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What is the best free PDF reader for large documents?
[1] PDF format is popularly known as print document format. This creates a virtual printer within operating system to print the document. For offline scanning of document, the PDF format is popular. The importance attached with these program is that you need to have PDFsoftware installed to run these files. If someone sends you PDF file and your computer do not have such software installed then that file is not to be read from there.There are so many PDF softwires available and this article aims to find out the mostly free software or freeware to help readers to choose from variety of options. More and more operating systems are providing built-in facilities for such products. Now-a-days everything comes with PDF formats beginning from circulars, bank statement, insurance statement, tax statement and e-books.That is why there immense important to have the free PDF software installed on computer but the thousand question is which one is to choose from the variety of resources available.Sumatra PDF:Sumatra PDF is available for download to Windows since the times of Windows XP. This program has very low foot print, light on system resources and fast. It is going to perform simple task as well as it is going to perform complex task depending upon you choose from PDFfiles. It is available with installed version as well as standalone portable version in which it does not write to registry.It is available in 64 bit version on Windows. It is available for Windows XP, Vista, 7, 8, 8.1 and 10. It is available for Windows operating system only.signNow Reader DC:It is from signNow and signNow is available for free for users. While installing this software do check for installation of MCAfee security and safe connect.it is a big download of nearing to 120 MB. Yours antivirus software might stop this installation so allow to install it. This software for high=end computing processes.Many features are included with it and for some features you might need it and if you want to have these features then it is better to choose this software. It has mobile version of android and apple operating system. With it you are going to synchronize documents with clouds and yours signature too and everything is going to stay with cloud to access from each and every device.When you first download signNow on Windows, a download manager first downloads and it is small in size and then by opening that download manager signNow software is installed and this is nearer to 120 MB.PDF-Xchange Editor:PDF-Xchange Editor is a smart PDF tools and most functions are free except some complex ones. It is a PDF reader, pdf editor and pdf tools. It can print PDFs, fill the forms created with signNow and can extract images from PDF files. There are some advanced features included in this free version but most of these are not free one is that watermarking of PDFsoftware which is not free.Foxit Reader:Foxit Reader is fast, simple and is there for years. It is available for Windows, Apple and android versions. It can fill forms and save data. Can include and validate electronic signatures. During installation user need to be cautioned not to install so many verities of other software. In order to keep the size of download minimal, the user manual is available for separate download.It is faster than PDF-Xchange Editor. If you are not interested in OCR facilities then Foxit reader is best suited for yours work. Multiple PDF documents when opened all these are opened in tab format and shifting from one tab to the other is easier. From time to time it introduces some new features in order to provide dynamic software development.It allows adding up of multimedia files easier. Collaboration with social media accounts becomes easier with Fixit Reader because of the ease to synchronize with Twitter, Facebook, Evernote and SharePoint. One caution is that Foxit Reader comes bundled with so many other software and toolbar and it is important to not to allow installations of such software during its installation.MuPDF Reader:It is very lightweight PDF Reader. On its first launch it will ask you about to choose from files instead of showing its interface and when the PDF is opened then it shows the exact documents and no toolbar and other interfaces are present. In order to see the interface of MuPDF reader you are going to click on the top left of the visible windows to find it. It provides a cleaner interface and superior look for PDF files.Google Chrome PDF viewer:While browsing for internet whenever you see any PDF and click on it and it will slowly open in another tab of Chrome and you can read it from there or download by clicking the downloadsymbol available there. This setting can be turned and changed out there easily, go to settings of chrome and then advanced and then content settings and then pdf documents, Scroll down and click on PDF documents and from there switch on ‘Download PDF files instead of opening automatically opening them in Chrome’ and this will download PDF files from net to computer.If you want to read PDF files that are stored inside computer, then right click on that files and then open with chrome and your chrome reader will automatically, open pdf files and for this you will not have to install pdf viewers. Similarly, with android if you install Google Drive then you will not need any other third-party PDF apps as Google Drive act as PDF viewer and make it default while opening the first PDF and that is going to make it default.TinyPDF:TinyPDF as the name suggests has very small foot print of PDF reader and it has no string attached. It is only 586k as it is less than one MB. It does not contain no malware, adware, watermarks and no pop Global Home: UPS is completely free. JPEG compression is supported. No ghost script and third-party software included with the installer version. The downside is that it is partially supported on 64-bit computer. Automatic font management is there.There are so many alternatives to use for PDF viewer and if your computer is 64 bit then you can download the 64 bit version of Sumatra PDF and if you want to insert electronic signature then opt for Foxit PDF reader and if you want to have the old and classic PDF reader which is heavier in file composition and not for low end computing purposes then go for signNow and lastly if you do not want to install PDF readers at all then it is better to open it with Google Chrome built in PDF viewer.So, there are many large numbers of option to choose from and if you want to have some complex PDF functions besides the presence of PDF reader you need pdf tools and others then it is best to have PDF-Xchange viewer and so many other option listed here you can choose it from. There are some other alternatives are available which are there to search ad find in internet.This entry was posted in Android Apps on Google Play, Apple Inc., Computer Information Technology, Google, Google Chrome, Information Technology, Internet, Windows 10, Windows 8, Windows XP and tagged signNow, Apple, doPDF, FOXIT READER, free PDF converter, google chrome, image to pdf converter, PDF Password Remover, pdf printer, pdf-xchange, Sumatra PDF A PDF Viewer for Windows, WINDOWS, Windows 8, WINDOWS VISTA, WINDOWS XP, Windows XP SP3 onFootnotes[1] Best Free PDF Writer and Reader
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Is wave-particle duality an illusion?
"Illusion" is an interesting choice of words. To acquire the kind of understanding I think you're after, let's back up a bit and see if we can excavate the foundation of this question. Let me start with a quote. “The voyage of discovery lies not in seeking new horizons, but in seeing with new eyes.” ~ Marcel Proust An examination of the double-slit experiment will give us a good introduction to the mystery you have singled out. But to make that examination worthwhile, we need to make sure that we are familiar with an important effect known as interference. [i]Interference applies universally to all interacting waves. A water wave, for instance, can be described as a disturbance in the shape of the water’s surface. This disturbance produces regions where the water level is higher and regions where it is lower than the undisturbed value. The highest part of each ripple is called a peak and the lowest part is called a trough. Typically waves involve periodic succession, peak followed by trough followed by peak and so on. In general, we can define a wavelength as the distance between identical parts of adjacent waves. Measurements from peak to peak, or trough to trough, for example, give the same value for wavelength.Figure 1 Peaks and troughs of wavesWhen waves interact in a medium, they interfere. For example, if we drop two rocks into spatially separated parts of a pond, their waves will interfere when they cross. (Figure 2) When a peak of one wave and a peak of another wave come together, the height of the water rises to a height equal to the sum of the two peaks. Similarly, when a trough of one wave and a trough of another wave cross, the depression of the water's surface dips to the sum of the two depressions. And when a peak of one wave crosses with a trough of another, the (at least partially) cancel each other out. The peak of one wave contributes a positive displacement while the trough of the other wave contributes a negative displacement. If the two waves have equal magnitude, then there will be perfect cancelation and the water's surface will be flat, just as it was before any wave existed.Figure 12-2 Constructive and destructive interference Keeping these rules of interference in mind, let’s turn our attention to light. If we take a laser emitting a single wavelength—a single color, and shine it on a screen that has a slit etched into it (Figure 3), what image should we expect to see on the wall behind the screen? [ii] Classically speaking, we would expect to see a stripe of light on the wall. (Classically means according to our four-dimensional intuition, or the rules of Euclidean geometry.) It turns out that this is what we see. In this sense light’s behavior correlates perfectly with our Euclidean intuition.Figure 12-3 Expected single slit projectionWhat image should we expect to see on the wall if we etch a second slit on our screen and cover the first slit with a black piece of tape? Well, our classical intuitions tell us to expect a line of light projected on the wall, just like we did before, except this line of light should be offset from the first. Again, this is exactly what we see when we perform the experiment. So far all of this is straightforward and conceptually trivial. But as it turns out, we are only one step away from a profound mystery. We discover this mystery by removing the piece of tape. To understand the impact of this mystery, ask yourself: What sort of projection do we expect to see on the wall when both slits are open?Classical intuition tells us that we should see two parallel bands of light on the wall (Figure 4).Figure 4 Expected double slit projectionBut this is where our classical training (our Euclidean intuition) lets us down. This is also where classical mechanics breaks down. When we perform this experiment, something completely counterintuitive happens, contradicting our Euclidean intuitions. A distinct interference pattern is projected on the wall (Figure 5).Figure 5 Actual double slit projection The bright and dark bands produced in this double-slit experiment are telltale signs that light propagates as a wave. [iii] Interference patterns are key signatures of waves. The problem is that this wavelike characteristic directly clashes with our observations of light’s particulate behavior. After all, photons are always found in point-like regions rather than spread out like a wave, and individual photons are always found to have very discrete amounts of energy. When measuring a wave, you would expect to find its energy spread out over a region instead of being concentrated in one location. So how are we supposed to make sense of this observation? What is going on?These diametrically opposed properties of light are verified facts. Contradictory as they may seem, they are here to stay. They have forced us to the seemingly paradoxical conclusion that light is both a wave and a particle. But how can this be? How can it be both? Although many scientists have found thewave-particle duality of light to be conceptually vague and schizophrenic, this description has persisted. In fact, after the wave-particle concept was adopted as an accurate description of light, it was extended to describe electrons and, eventually, all of matter. This transition was nothing short of a revolution.Up until 1910, atoms were simplistically viewed as miniature solar systems with the nucleus making up the “central star” and orbiting electrons being “planets”. [iv] The wave-particle duality of light and matter rejected this view and pointed to a signNowly different architecture for atoms. Of course, this conceptual transition did not take hold over night.In 1924, Prince Louis de Broglie found that in addition to their particle like character, [v] electrons also possessed a wavelike character. In 1927, Clinton Davisson and Lester Germer followed this up by firing a beam of electrons at a piece of nickel crystal, which acted as a barrier analogous to the one used in the double-slit experiment. A phosphor screen recorded the resultant pattern of electrons. [vi] When they examined the screen, they observed an interference pattern just like the one produced in the double-slit experiment, showing that even electrons have wavelike properties.These experiments shook the foundation of physics by threatening the structure of classical mechanics and destroying humanity’s intuitive framework of reality. But it didn’t stop there. The next step was to tune the beam of electrons down so that the electron gun fired just a single electron at a time. Similar experiments were later used with lasers wherein individual photons were fired seconds apart from each other. The results were mind-bending.Completely against expectation these experiments also produced interference patterns over time as the collection of electrons (or photons) continued to build (Figure 6).Figure 12-6 Over time individual photons construct an interference patternThese observations only added to the confusion. Waves are supposed to be a collective property—something that has no meaning when applied to separate, particulate ingredients. (A water wave, for example, involves a large number of water molecules.) So how can a single electron, or a single photon, be a wave? Furthermore, wave interference requires a wave from one place to interact with a wave from another place. So how can interference be relevantly applied to a single electron or photon? While we are considering such questions, we should also ask, if a single electron or photon is a wave, then what is it that is “waving”? [vii]To answer these questions, Erwin Schrödinger proposed that the stuff that makes up electrons might be smeared out in space and that this smeared electron essence might be what waves. If this idea was correct then we would expect to find all of the electron’s properties, spread out over a distance, but we never do. Every time we locate an electron, we find all of its mass and all of its charge concentrated in one tiny, point-like region. Max Born came up with a different idea. He suggested that the wave is actually a probability wave. [viii] Einstein tinkered with a similar idea when he hypothesized that these waves were optical observations that refer to time averages rather than instantaneous values. Inserting a probability wave (also called a state vector, or a wave function) as a fundamental aspect of Nature delivers another blow to our common-sense ideas about how things truly operate. It suggests that experiments with identical starting conditions do not necessarily lead to identical results because it claims that you can never predict exactly where an electron will be in a single instant. You can only define a probability that we will find it over here, or over there, at any given moment. Two situations with the same probabilistic starting conditions, say of a single particle, might not produce the same results, because the particle can be anywhere within that probability distribution. From a classical perspective, the discovery that the microscopic universe behaves this way is absolutely baffling. Nevertheless, it is how we have observed Nature to be.This leads us to a rather interesting precipice. It seems that the map we have been using to chart physical reality somehow dissolves when we look closely at it. The rules of four-dimensional geometry simply fail to accurately map Nature when we examine the smallest scales. Nature doesn’t strictly behave as our old Euclidean map dictates. Stumbling upon this discovery forces us to face a vital question. Is Nature ultimately and fundamentally probabilistic in a way that we may never understand, as many modern physicists have chosen to believe; or, is this probabilistic quality a byproduct of our reduced dimensional representation of Nature?After pondering these questions long and hard, some physicists have come to believe that the tapestry of spacetime is analogous to water: that the smooth appearance of space and time is only an approximation that must yield to a more fundamental framework when considering ultramicroscopic scales. As far as I can tell, however, up until now this point has only been entertained abstractly. Geometrically resolving a molecular structure for space might resolve our greatest quantum mechanical mysteries, but as of yet, no one has taken that final step. No one has developed a self-consistent picture from this geometric insight. No one has moved beyond the mathematical suggestion that spacetime is analogous to water, or interpreted the theoretical quanta of space as being physically real. Consequently, a framework that enables conceptualization of what is meant by the “molecules” or “atoms” of spacetime has not been developed.Eight decades of meticulous experiments have confirmed the predictions of quantum mechanics based on this wave function, or probability wave, description with amazing precision. “Yet there is still no agreed-upon way to envision what quantum mechanical probability waves actually are. Whether we should say that an electron’s probability wave is the electron, or that it’s associated with the electron, or that it’s a mathematical device for describing the electron’s motion, or that it’s the embodiment of what we can know about the electron is still debated.” [ix]Although quantum mechanics describes the universe as having an inherently probabilistic character, we don’t experience the effects of this character in our day-to-day lives. Why is this? The answer, according to quantum mechanics, is that we don't see quantum events like a chair being here now and then across the room in the next instant, because the probability of that occurring, although not zero, is absurdly miniscule. But what exactly makes the probability for large things to act, as electrons do, so small? At what scales do such effects become important? And, why should the macroscopic universe be so different from the microscopic universe?As if these newly uncovered characteristics of reality weren’t obscure enough, quantum physicists conceptually fuddle things further by suggesting that without observation things have no reality. They claim that until the position of an electron is actually measured the electron has no definite position. Before it is measured, the position exists only as a probability, and then suddenly, through the act of measuring, the electron miraculously acquires the property of position.Einstein acutely recognized the absurdity of this claim. When approached with this conjecture, he famously quipped, “Do you really believe that the moon is not there unless we are looking at it?” [x] To him everything in the physical world had a reality independent of our observations. Measurements that suggested otherwise were mere reflections of the incompleteness by which we currently map and comprehend physical reality. To many quantum physicists, however, the unobserved Moon’s existence became a matter of probability. To them, a discoverable, complete map of physical reality, with the ability to resolve an underlying determinism, became nothing more than a myth—a romantic dream.The mathematical projection of quantum mechanics can be statistically matched with our four-dimensional observations, but when it comes to a conceptual explanation of those observations, it completely lets us down. Intuitive explanations cannot be gleaned from a framework of physical reality that is assumed to be fundamentally probabilistic. By definition, randomness blurs causality. This vague description of physical reality keeps us from grasping a deeper truth by allowing what should be the most basic of concepts to drip into a realm of nonsense.As an example of the confusion that stems from swallowing the standard quantum mechanical interpretation “guts, feathers, and all,” consider the fact that a probabilistic treatment of quantum mechanics leads us to the conclusion that the double-slit experiment can be explained by assuming that a photon actually takes both paths. We can combine the two probability waves emerging from both slits to statistically determine where a photon will land on a screen. The result mimics an interference pattern.According to this, we can explain interference patterns by assuming that one photon somehow always manages to go through both slits, but is this really what is going on? Does a photon really travel along both paths? Can this count as an explanation if we have no coherent sense of what it means? You might notice that if we were to design our experiment with three slits, then we would have to consider whether or not the photon really travels all three routes. This question can be extended for as many slits as you like, but the fundamental conceptual problem remains the same.In order to solve this mystery, you may suggest that we place detectors in front of the slits to determine if the photons are actually going through both slits, or just one. When we do this, we always find that individual photons pass through one slit or the other—never both. But, when we measure the position of individual photons we no longer get an interference pattern and so the question retains its ambiguity. Some have taken this to mean that the act of observation forces wave properties to collapse into a particle, but how and why this theoretical collapse occurs still lacks explanation.Because probability waves are not directly observable and because photons (and electrons) are always found in one place or another when measured, we might be tempted to think that probability waves might not be real—that they were never really there. If that is true, then how are the interference patterns created? Surely these probability waves exist, but in what sense? What are they referencing? Why is it that whenever we know which path the photon takes, we get a classical image instead of an interference pattern? How does the detection of a photon, or an electron, change its behavior?To date, these questions have yet to be resolved. In fact, more clever experiments designed to solve these questions have only deepened the mystery. For example, let’s perform the double-slit experiment again, but this time let’s place devices in front of the slits, which mark (but do not stop or detect) the photons before they pass through the slits. This marking allows us to examine the photons that strike the screen and subsequently determine which slit they passed through. Thus we only gain knowledge of which path the photon takes after the path has been completed. For some reason, however, when we do this we find that the photons do not build up an interference pattern. They form a classical image (Figure 4).Once again, it seems that “which-path” information inhibits us from probing these ghostly waves. But is it really the fact that we gain the ability to determine which path a photon goes through—independent of when we gain that information—that disrupts the interference pattern? Or does our marking of the photon somehow disrupt its interference potential?To explore this question, we perform what’s known as the quantum eraser experiment. We start with the same set up we just described. Then we place another device between each slit and the screen, which completely removes the mark from the photon. We already know that the marked photons project a classical image. Will an interference pattern reemerge if we remove the effects of this mark—if we lose the ability to extract the which-path information?When we perform this experiment the interference pattern does return (Figure 7). Does this mean that photons somehow choose how to act, based on our knowledge of them? Or does it imply something even stranger—that the photons are always both particles and waves simultaneously? How are we to understand either conclusion?Figure 12-7 An interference pattern Another curiosity of Nature is known as the photoelectric effect. Philipp Lenard first discovered this effect through controlled experiments in 1900. When light shines on a metal surface, it causes electrons to be knocked loose and emitted. Knowing this, Lenard designed an experiment that allowed him to control the frequencyof the incoming light. During the experiment, he increased the frequency of the light—moving from infrared heat and red light to violet and ultraviolet. Greater frequencies caused the emitted electrons to speed away with more kinetic energy. After discovering this, Lenard reconfigured his experiment to allow him to control the intensity of the incoming light. He used a carbon arc light that could be made brighter by a factor of 1,000.Because both experiments involved increasing the amount of incoming light energy he expected to have identical results. In other words, because the brighter, more intense light had more energy, Lenard expected that the electrons emitted would have more energy and speed away faster. But that’s not what happened. Instead, the more intense light produced more electrons, but the energy of each electron remained the same. [xi]In response to these experiments Einstein suggested that light is composed of discrete packets called photons. Under this assumption, light with higher frequency would cause electrons to be emitted with more energy, and light with higher intensity, that is, a higher quantity of photons, would result in emission of more electrons—just as we observe.The problem with this solution (a solution that is now universally accepted among physicists) is that it doesn’t provide us with a clear description for what the light quanta are. Why does light come in quantized packets? Near the end of his life Einstein lamented over this problem in a letter to his dear friend Michele Besso. He wrote, “All these fifty years of pondering have not brought me any closer to answering the question, what are light quanta?” [xii] It’s been another fifty years and we seem as confused as ever over how it is that light is quantized into little discrete packets called photons.In the midst of these enigmas lies the uncertainty principle, which states that knowledge of certain properties inhibits knowledge of other complimentary properties. For example, the more accurately we determine the position of an electron, the less we can determine its momentum, and vise versa.Heisenberg tried to explain the uncertainty principle by appealing to the observer effect; claiming that it was simply an observational effect of the fact that measurements of quantum systems cannot be made without affecting those systems. [xiii] Since then, the uncertainty principle has regularly been confused with the observer effect. [xiv] But the uncertainty principle is not a statement about the observational success of current technology. It has nothing to do with the observer effect. It highlights a fundamental property of quantum systems, a property that turns out to be inherent in all wave-like systems. [xv] Uncertainty is an aspect of quantum mechanics because of the wave nature it ascribes to all quantum objects.If our current description of quantum mechanics is fundamental, if there is nothing beneath the state vector—a claim that defines the heart of the standard interpretation of quantum mechanics—then this uncertainty principle may be a sharp enough dagger to kill our quest for an intuitive understanding of physical reality. The corrosive power of the uncertainty principle, when mixed with our current paradigm, is poignantly illustrated by an old story involving Niels Bohr. According to the story, Bohr was once asked what the complementary quality to truth is. After some thought he answered—“clarity.” [xvi] Unlike classical mechanics, which describes systems by specifying the positions and velocities of its components, quantum mechanics uses a complex mathematical object called a state vector (also called the wave function [xvii]) to map physical systems. Interjecting this state vector into the theory enables us to match its predictions to our observations of the microscopic world, but it also generates a relatively indirect description that is open to many equally valid interpretations. This creates a sticky situation, because to “really understand” quantum mechanics we need to be able to specify the exact status of and to have some sort of justification for that specification. At the present, we only have questions. Does the state vector describe physical reality itself, or only some (partial) knowledge that we have of reality? “Does it describe ensembles of systems only (statistical description), or one single system as well (single events)? Assume that indeed, is affected by an imperfect knowledge of the system, is it then not natural to expect that a better description should exist, at least in principle?” [xviii] If so, what would this deeper and more precise description of reality be?To explore the role of the state vector, consider a physical system made of Nparticles with mass, each propagating in ordinary three-dimensional space. In classical mechanics we would use Npositions and N velocities to describe the state of the system. For convenience we might also group together the positions and velocities of those particles into a single vector V, which belongs to a real vector space with 6N dimensions, called phase space. [xix]The state vector can be thought of as the quantum equivalent of this classical vector V. The primary difference is that, as a complex vector, it belongs to something called complex vector space, also known as space of states, or Hilbert space. In other words, instead of being encoded by regular vectors whose positions and velocities are defined in phase space, the state of a quantum system is encoded by complex vectors whose positions and velocities live in a space of states. [xx]The transition from classical physics to quantum physics is the transition from phase space to space of states to describe the system. In the quantum formalism each physical observable of the system (position, momentum, energy, angular momentum, etc.) has an associated linear operator acting in the space of states. (Vectors belonging to the space of states are called “kets.”) The question is, is it possible to understand space of states in a classical manner? Could the evolution of the state vector be understood classically (under a projection of local realism) if, for example, there were additional variables associated with the system that were ignored completely by our current description/understanding of it?While that question hangs in the air, let’s note that if the state vector is fundamental, if there really isn’t a deeper-level description beneath the state vector, then the probabilities postulated by quantum mechanics must also be fundamental. This would be a strange anomaly in physics. Statistical classical mechanics makes constant use of probabilities, but those probabilistic claims relate to statistical ensembles. They come into play when the system under study is known to be one of many similar systems that share common properties, but differ on a level that has not been probed (for any reason). Without knowing the exact state of the system we can group all the similar systems together into an ensemble and assign that ensemble state to our system. This is done as a matter of convenience. Of course, the blurred average state of the ensemble is not as clear as any of the specific states the system might actually have. Beneath that ensemble there is a more complete description of the system’s state (at least in principle), but we don’t need to distinguish the exact state in order to make predictions. Statistical ensembles allow us to make predictions without probing the exact state of the system. But our ignorance of that exact state forces those predictions to be probabilistic.Can the same be said about quantum mechanics? Does quantum theory describe an ensemble of possible states? Or does the state vector provide the most accurate possible description of a single system? [xxi]How we answer that question impacts how we explain unique outcomes. If we treat the state vector as fundamental, then we should expect reality to always present itself in some sort of smeared out sense. If the state vector were the whole story, then our measurements should always record smeared out properties, instead of unique outcomes. But they don’t. We always measure well-defined properties that correspond to specific states. Sticking with the idea that the state vector is fundamental, von Neumann suggested a solution called state vector reduction (also called wave function collapse). [xxii] The idea was that when we aren’t looking, the state of a system is defined as a superposition of all its possible states (characterized by the state vector) and evolves according to the Schrödinger equation. But as soon as we look (or take a measurement) all but one of those possibilities collapse. How does this happen? What mechanism is responsible for selecting one of those states over the rest? To date there is no answer. Despite this, von Neumann’s idea has been taken seriously because his approach allows for unique outcomes.The problem that von Neumann was trying to address is that the Schrödinger equation itself does not select single outcomes. It cannot explain why unique outcomes are observed. According to it, if a fuzzy mix of properties comes in (coded by the state vector), a fuzzy mix of properties comes out. To fix this, von Neumann conjured up the idea that the state vector jumps discontinuously (and randomly) to a single value. [xxiii] He suggested that unique outcomes occur because the state vector retains only the “component corresponding to the observed outcome while all components of the state vector associated with the other results are put to zero, hence the name reduction.” [xxiv]The fact that this reduction process is discontinuous makes it incompatible with general relativity. It is also irreversible, which makes it stand out as the only equation in all of physics that introduces time-asymmetry into the world. If we think that the problem of explaining uniqueness of outcome eclipses these problems, then we might be willing to take them in stride. But to make this trade worthwhile we need to have a good story for how state vector collapse occurs. We don’t. The absence of this explanation is referred to as the quantum measurement problem.Many people are surprised to discover that the quantum measurement problem still stands. It has become popular to explain state vector reduction (wave function collapse) by appealing to the observer effect, asserting that measurements of quantum systems cannot be made without affecting those systems, and that state vector reduction is somehow initiated by those measurements. [xxv] This may sound plausible, but it doesn’t work. Even if we ignore the fact that this ‘explanation’ doesn’t elucidate howa disturbance could initiate state vector reduction, this isn’t an allowed answer because “state vector reduction can take place even when the interactions play no role in the process.” [xxvi] This is illustrated by negative measurements or interaction free measurements in quantum mechanics.To explore this point, consider a source, S, that emits a particle with a spherical wave function, which means its values are independent of the direction in space. [xxvii] In other words, it emits photons in random directions, each direction having equal probability. Let’s surround the source by two detectors with perfect efficiency. The first detector D1should be set up to capture the particle emitted in almost all directions, except a small solid angle θ, and the second detector D2 should be set up to capture the particle if it goes through this solid angle (Figure 8).Figure 8 An interaction-free measurement When the wave packet describing the wave function of the particle signNowes the first detector, it may or may not be detected. (The probability of detection depends on the ratio of the subtended angles of the detectors.) If the particle is detected by D1 it disappears, which means that its state vector is projected onto a state containing no particle and an excited detector. In this case, the second detector D2will never record a particle. If the particle isn’t detected by D1 then D2 will detect the particle later. Therefore, the fact that the first detector has not recorded the particle implies a reduction of the wave function to its component contained within θ, implying that the second detector will always detect the particle later. In other words, the probability of detection by D2 has been greatly enhanced by a sort of “non-event” at D1. In short, the wave function has been reduced without any interaction between the particle and the first measurement apparatus.Franck Laloë notes that this illustrates that “the essence of quantum measurement is something much more subtle than the often invoked ‘unavoidable perturbations of the measurement apparatus’ (Heisenberg microscope, etc.).” [xxviii] If state vector reduction really takes place, then it takes place even when the interactions play no role in the process, which means that we are completely in the dark about how this reduction is initiated or how it unfolds. Why then is state vector reduction still taken seriously? Why would any thinking physicist uphold the claim that state vector reduction occurs, when there is no plausible story for how or why it occurs, and when the assertion that it does occur creates other monstrous problems that contradict central tenets of physics? The answer may be that generations of tradition have largely erased the fact that there is another way to solve the quantum measurement problem.Returning to the other option at hand, we note that if we assume that the state vector is a statistical ensemble, if we assume that the system does have a more exact state, then the interpretation of this thought experiment becomes straightforward; initially the particle has a well-defined direction of emission, and D2records only the fraction of the particles that were emitted in its direction.Standard quantum mechanics postulates that this well-defined direction of emission does not exist before any measurement. Assuming that there is something beneath the state vector, that a more accurate state exists, is tantamount to introducing additional variables to quantum mechanics. It takes a departure from tradition, but as T. S. Eliot said in The Sacred Wood, “tradition should be positively discouraged.” [xxix] The scientific heart must search for the best possible answer. It cannot flourish if it is constantly held back by tradition, nor can it allow itself to ignore valid options. Intellectual journeys are obliged to forge new paths.So instead of asking whether of not wave-particle duality is an illusion, perhaps we should ask whether wave-particle duality implies that the state vector is the most fundamental description of a quantum mechanical system, or if a deeper level description exists? That's an open question, and at the moment there are many possible answers — interpretations of quantum mechanics that are equally aligned with the empirical evidence. What's your answer?For more on this topic, and to discover how pilot-wave theory is elucidated by the assumption that the vacuum is a superfluid, see Einstein's Intuition, available in black and white softcover, full color softcover, full color hardcover, an iBook, and as an audiobook.[i] The discussion on interference and the double-slit experiment that follows is further developed by Brian Greene, (2004). The Fabric of the Cosmos: Space, Time and the Texture of Reality. New York: Knopf, pp. 84–84. Greene’s discussion was used as a general guide here.[ii] In order to show diffraction (a fuzzy border of light on the projected image) the slit must have a width that does not greatly exceed the wavelength of the color of the light that we have chosen.[iii] Light’s wave nature was first revealed in the mid-seventeenth century through experiments performed by the Italian scientist Francesco Maria Grimaldi, and was later expanded upon by experiments performed in 1803 by the physician and physicist Thomas Young. (1807). Interference of Light; Alan Lightman. A Sense Of The Mysterious. pp. 51–52, 71.[iv] Before the “planetary model” of the atom, physicists pictured the atom being a plum-shaped blob (the nucleus) with tiny protruding springs that each had an electron stuck to its end. When the atom absorbed energy it was thought that these electrons would jiggle (oscillate) on the ends of their springs. Consequently, any atom that was above its ground state of energy was understood to be an “excited atomic oscillator,” This depiction of the atom wasn’t overthrown until 1900. At that point in history the physical existence of atoms was still controversial. It was replaced by the planetary model, which in turn was replaced by the electron cloud model we use today—a model that was initiated in 1910 and was secured by 1930. Gary Zukav. The Dancing Wu Li Masters, pp. 49–50.[v] Electrons can be individually counted and you can individually place them on a drop of oil and measure their electric charge. Richard Feynman. (1988). QED, The Strange Theory of Light and Matter. Princeton University Press, p. 84.[vi] According to de Broglie’s doctoral thesis all matter has corresponding waves. The wavelength of the “matter waves” that “correspond” to matter depends upon the momentum of the particle. Specifically, , which falls into an important group of equations along with Planck’s equation ) and the ever famous . (λ, pronounced “lambda,” stands for wavelength, h is Planck’s constant, and pronounced ‘nu’ represents the frequency of a photon) From this equation we are told to expect that when we send a beam of electrons (something we might traditionally think of as a stream of particles) through tiny openings, like the spacing between atoms in a piece of nickel crystal, the beam will diffract, just like light diffracts. The only requirement here is that the spacing between the atoms of the material must be as small, or smaller, than the electron’s corresponding wavelength—just like the slits in our double-slit experiment. When we perform the experiment, diffraction and therefore interference, occurs exactly as wave mechanics predicts.[vii] Part of the problem here is that in keeping with our four-dimensional intuition we tend to assume a particle aspect in the double-slit experiment without accounting for nonlocality. By doing this we are technically violating Heisenberg’s uncertainty principle and missing the bigger picture.[viii] M. Born. (1926). Quantenmechanik der Stossvorgänge. Zeitschrift für Physik 38, 803–827; (1926). Zur Wellenmechanik der Stossvorgänge. Göttingen Nachrichten 146–160.[ix] Brian Greene. (2004), p. 91.[x] Albert Einstein quoted in Einstein by Walter Isaacson.[xi] Walter Isaacson. Einstein, pp. 96–97.[xii] Ibid.[xiii] Werner Heisenberg. The Physical Principles of the Quantum Theory, p. 20.[xiv] Masano Ozawa. (2003). Universally valid reformulation of the Heisenberg uncertainty principle on noise and disturbance in measurement. Physical Review A 67 (4), arXiv:quant-ph/0207121; Aya Furuta. (2012). One Thing Is Certain: Heisenberg’s Uncertainty Principle Is Not Dead. Scientific American.[xv] L. A. Rozema, A. Darabi, D. H. Mahler, A. Hayat, Y, Soudagar, & A. M. Steinberg. (2012). Violation of Heisenberg’s Measurement—Disturbance Relationship by Weak Measurements. Physical Review Letters 109 (10).[xvi] Steven Weinberg. Dreams Of A Final Theory, p. 74.[xvii] For a system of spinless particles with masses, the state vector is equivalent to a wave function, but for more complicated systems this is not the case. Nevertheless, conceptually they play the same role and are used in the same way in the theory, so that we do not need to make a distinction here. Franck Laloë. Do We Really Understand Quantum Mechanics?, p. 7.[xviii] Franck Laloë. Do We Really Understand Quantum Mechanics?, p. xxi.[xix] There are 6N dimensions in this phase space because there are N particles in the system and each particle comes with 6 data points (3 for its spatial position (x, y, z) and 3 for its velocity, which has x, y, zcomponents also).[xx] The space of states (complex vector space or Hilbert space) is linear, and therefore, conforms to the superposition principle. Any combination of two arbitrary state vectors and within the space of states is also a possible state for the system. Mathematically we write where & are arbitrary complex numbers.[xxi] Franck Laloë. Do We Really Understand Quantum Mechanics?, p. 19.[xxii] Chapter VI of J. von Neumann. (1932). Mathematische Grundlagen der Quantenmechanik, Springer, Berlin; (1955). Mathematical Foundations of Quantum Mechanics, Princeton University Press.[xxiii] It might be useful to challenge the logical validity of the claim that something can “cause a random occurrence.” By definition, causal relationships drive results, while “random” implies that there is no causal relationship. Deeper than this, I challenge the coherence of the idea that genuine random occurrences can happen. We cannot coherently claim that there are occurrences that are completely void of any causal relationship. To do so is to wisk away what we mean by “occurrences.” Every occurrence is intimately connected to the whole, and ignorance of what is driving a system is no reason to assume that it is randomly driven. Things cannot be randomly driven. Cause cannot be random.[xxiv] Franck Laloë. Do We Really Understand Quantum Mechanics?, p. 11.[xxv] Bohr preferred another point of view where state vector reduction is not used. D. Howard. (2004). Who invented the Copenhagen interpretation? A study in mythology. Philos. Sci. 71, 669–682.[xxvi] Franck Laloë. Do We Really Understand Quantum Mechanics?, p. 28.[xxvii] This example was inspired by section 2.4 of Franck Laloë’s book, Do We Really Understand Quantum Mechanics?, p. 27–31.[xxviii] Franck Laloë. Do We Really Understand Quantum Mechanics?, p. 28.[xxix] T. S. Eliot. (1921). The Sacred Wood. Tradition and the Individual Talent.
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What are smart contracts?
Smart contracts are programs with contract clauses, determined by the parties and written into the lines of code. While each network participant has access to all the data, they automatically trace agreements’ completion and remove any intermediaries.In fact, an Ethereum smart contract represents an ordinary contract, but the fixing goes not legally, but technically. So, there is no need for a notary or any other authorized administrator, recognized by both parties.In Blockchain, smart contracts are responsible for data manipulation. Each smart contract has a small database and provides methods for changing its data.Since contracts are replicated across all nodes, their databases also are. Every time a user calls a method from a contract, thus changing the data, this command is replicated and repeated by the entire network. This process enables to create a distributed consensus to fulfill agreements.Noteworthy that Ethereum smart contracts describe what data to store in the ledger as well as a set of functions for performing operations on these data.Functions’ execution is carried out through the interface, provided by each contract and generated from the source code separately from the compilation. Also, the interface allows executing of the binary code.Data changes occur via transactions, that require such 3 essential elements as transaction sender, transaction recipient, and the amount of currency.The execution of transactions needs the efforts of internal currency (ether – ETH) and waiting when another block (created by the miner) with your transaction is included in the chain.The contract code is executed on the miner’s computer in the Ethereum virtual machine (EVM), and the minor receives a commission in return (gas).When sending a transaction you define the amount of ETH you would pay for each gas unit as well as the maximum amount of gas you are ready to pay.As the payment for gas is the payment for miners’ work, the more you set, the more priority your transaction has. Now, let’s get insight in smart contract development.Find out more useful information about Ethereum and smart contract development.Also, check out how to create a Hello, World contract on the Ethereum command line.
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What are the laws - Data Protection, Data Transmission and Export and Data Encryption in India to operate a technology platform
The Information Technology Act, 2000 came into force on 17.10.2000 vide G.S.R No. 788(E) dated 17.10.2000 and for the first time, a legal definition of “Computer”, “Data”, “electronic record”, “Information” et al were provided. The said Act gave a legal recognition to the electronic records and digital signatures and in Chapter IX thereof provided for penalty and adjudication. Section 43 of the Act interalia provided that in case of unauthorised access, download or copying or damage to data etc, the person responsible shall be liable to pay damages by way of compensation not exceeding one crore rupees to the person affected.Apart from civil liability provided under Section 43, Chapter XI (Sections 63 to 78) of the Act of 2000 provided for criminal liability in cases of Tampering, Hacking, publishing or transmitting obscene material, misrepresentation etc. Apart from the same, Section 72 of the Act provided for penalty in case of bsignNow of confidentiality and privacy and laid that in case any person who has secured access to any electronic record, Data or information, discloses the same to any other person without obtaining the consent of the person concerned, he shall be punished with imprisonment upto two years or with fine upto Rupees one lakh or with both.However, the provisions of the Information Technology Act, 2000 were not adequate and the need for more stringent data protection measures were felt, the Information Technology (Amendment) Act, 2008 was enacted which came into force on 27.10.2009. The said Amendment Act brought in the concepts like cyber security in the statute book and widened the scope of digital signatures by replacing the words “electronic signature”. The amendment act also provided for secure electronic signatures and enjoined the central government to prescribe security procedures and practices for securing electronic records and signatures (Sections 15-16) The amendment Act also removed the cap of Rupees One Crore as earlier provided under Section 43 for damage to computer and computer systems and for unauthorised downloading/ copying of data. The said Amendment Act also introduced Section 43A which provides for compensation to be paid in case a body corporate fails to protect the data. Section 46 of the Act prescribes that the person affected has to approach the adjudicating officer appointed under Section 46 of the Act in case the claim for injury or damage does not exceed Rupees Five crores and the civil court in case, the claim exceeds Rupees Five crores. The amendment act also brought/ introduced several new provisions which provide for offenses such as identity theft, receiving stolen computer resource/ device, cheating, violation of privacy, cyber terrorism, pornography (Section 66A-F & 67A-C). The amendment act also brought in provisions directing intermediaries to protect the data/information and penalty has been prescribed for disclosure of information of information in bsignNow of lawful contract (Section 72A)With the enactment of the Amendment Act of 2008, India for the first time got statutory provisions dealing with data protection. However, as the ingredients of “sensitive personal data and information” as well as the “reasonable security practices and procedures” were yet to be prescribed by the Central Government, the Ministry of Communications and Information Technology vide Notification No. GSR 313 (E) dated 11th April 2011 made the Information Technology (Reasonable Security Practices and Procedures and Sensitive Personal Data or Information ) Rules, 2011 (the said rules). Rule 3 of the said rules defines personal sensitive data or information and provides that the same may include information relating to password, financial information such as bank account or credit card details, health condition, medical records etc. Rule 4 enjoins every body corporate which receives or deals with information to provide a privacy policy. Rule 5 prescribes that every body corporate shall obtain consent in writing from the provider of the sensitive information regarding purpose of usage before collection of such information and such body corporate will not collect such information unless it is collected for a lawful purpose connected with the function or activity of such body corporate and collection of such information or data is necessary and once such data is collected, it shall not be retained for a period longer than what is required. Rule 6 provides that disclosure of the information to any third party shall require prior permission from the provider unless such disclosure has been agreed to in the contract between the body corporate and the provider or where the disclosure is necessary for compliance of a legal obligation. The Body corporate has been barred to publish sensitive information and the third parties receiving such information have been barred to disclose it further. Rule 7 lays down that the body corporate may transfer such information to any other body corporate or person in India or outside, that ensure the same level of data protection and such transfer will be allowed only if it is necessary for performance of lawful contract between the body corporate and provider of information or where the provider has consented for data transfer. Rule 8 of the said rules further provide reasonable security practises and procedures and lays down that international standard IS/ISO/IEC 27001 on “Information Technology- Security Techniques- Information Security Management System- requirements “ would be one such standard.The Ministry of Communication and Information Technology further issued a press note dated 24th August 2011 and clarified that the said rules are applicable to the body corporate or any person located within India. The press note further provides that any body corporate providing services relating to collection or handling of sensitive personal data or information under contractual obligation with any other legal entity located within India or outside is not subject to requirements of Rules 5 &6 as mentioned hereinabove. A body corporate providing services to the provider of information under a contractual obligation directly with them however has to comply with Rules 5 &6. The said press note also clarifies that privacy policy mentioned in Rule 4 relates to the body corporate and is not with respect to any particular obligation under the contract. The press note at the end provides that the consent mentioned in Rule 5 includes consent given by any mode of electronic communication.Data Protection relates to issues relating to the collection, storage, accuracy and use of data provided by net users in the use of the World Wide Web. Visitors to any website want their privacy rights to be respected when they engage in e-Commerce. It is part of the confidence-creating role that successful e-Commerce businesses have to convey to the consumer. If industry doesn't make sure it's guarding the privacy of the data it collects, it will be the responsibility of the government and it's their obligation to enact legislation.Any transaction between two or more parties involves an exchange of essential information between the parties. Technological developments have enabled transactions by electronic means. Any such information/data collected by the parties should be used only for the specific purposes for which they were collected. The need arose, to create rights for those who have their data stored and create responsibilities for those who collect, store and process such data. The law relating to the creation of such rights and responsibilities may be referred to as ‘data protection’ law.The world’s first computer specific statute was enacted in the form of a Data Protection Act, in the German state of Hesse, in 1970.The misuse of records under the Nazi regime had raised concerns among the public about the use of computers to store and process large amounts of personal data.The Data Protection Act sought to heal such memories of misuse of information. A different rationale for the introduction of data protection legislation can be seen in the case of Sweden which introduced the first national statute in 1973.Here, data protection was seen as fitting naturally into a two hundred year old system of freedom of information with the concept of subject access (such a right allows an individual to find out what information is held about him) being identified as one of the most important aspects of the legislation.In 1995, the European Union adopted its Directive (95/46/EC) of the European Parliament and of the Council of 24 October 1995 on the protection of individuals with regard to the processing of personal data and on the free movement of such data (hereinafter, the Directive), establishing a detailed privacy regulatory structure. The Directive is specific on the requirements for the transfer of data. It sets down the principles regarding the transfer of data to third countries and states that personal data of EU nationals cannot be sent to countries that do not meet the EU “adequacy” standards with respect to privacy.In order to meet the EU “adequacy” standards, US developed a ‘Safe Harbour’ framework, according to which the US Department of Commerce would maintain a list of US companies that have self-certified to the safe harbor framework. An EU organization can ensure that it is sending information to a U.S. organization participating in the safe harbor by viewing the public list of safe harbor organizations posted on the official website.Data protection has emerged as an important reaction to the development of information technology. In India data protection is covered under the Information Technology Act, 2000 (hereinafter, the Act). The Act defines ‘data’ as, “‘data’ means a representation of information, knowledge, facts, concepts or instructions which are being prepared or have been prepared in a formalized manner, and is intended to be processed, is being processed or has been processed in a computer system or computer network, and may be in any form (including computer printouts magnetic or optical storage media, punched cards, punched tapes) or stored internally in the memory of the computer”. Protection of such data and privacy are covered under specific provisions in the Act. In the recent past, the need for data protection laws has been felt to cater to various needs. The following analyses the position of data protection law with respect to some of the needs.Data Protection Law In Respect of Information Technology Enabled Services (ITES)India started liberalizing its economy in the 1990’s and since then a huge upsurge in the IT business process outsourcing may be witnessed. Financial, educational, legal, marketing, healthcare, telecommunication, banking etc are only some of the services being outsourced into India. This upsurge of outsourcing of ITES into India in the recent past may be attributed to the large English-speaking unemployed populace, cheap labour, enterprising and hardworking nature of the people etc. Statistics have shown that the outsourcing industry is one of the biggest sources of employment. In a span of four years, the number of people working in call centers in the country supporting international industries has risen from 42,000 to 3,50,000. Exports were worth $5.2 billion in 2004-2005 and are expected to grow over 40% this fiscal year. US is currently the biggest investor in Indian ITES, taking advantage of cheap labour costs. Statistics indicate that software engineers with two-years experience in India are being paid about 1/5th of an equivalent US employee.Concerns about adequacy of lawBPO FraudsWith globalization and increasing BPO industry in India, protection of data warrants legislation. There are reasons for this. Every individual consumer of the BPO Industry would expect different levels of privacy from the employees who handle personal data. But there have been situations in the recent past where employees or systems have given away the personal information of customers to third parties without prior consent. So other countries providing BPO business to India expect the Indian government and BPO organizations to take measures for data protection. Countries with data protection law have guidelines that call for data protection law in the country with whom they are transacting.For instance, in, the European Union countries according to the latest guidelines, they will cease to part with data, which are considered the subject matter of protection to any third country unless such other country has a similar law on data protection. One of the essential features of any data protection law would be to prevent the flow of data to non-complying countries and such a provision when implemented may result in a loss of "Data Processing" business to some of the Indian companies.In the recent past, concerns have been raised both within the country as well as by customers abroad regarding the adequacy of data protection and privacy laws in the country. A few incidents have questioned the Indian data protection and privacy standards and have left the outsourcing industry embarrassed. In June 2005, ‘The Sun’ newspaper claimed that one of its journalists bought personal details including passwords, addresses and passport data from a Delhi IT worker for £4.25 each. Earlier BPO frauds in India include New York-based Citibank accounts being looted from a BPO in Pune and a call-center employee in Bangalore peddling credit card information to fraudsters who stole US$398,000 from British bank accounts.UK's Channel 4 TV station ran broadcast footage of a sting operation exposing middlemen hawking the financial data of 200,000 UK citizens. The documentary has prompted Britain's Information Commissioner's Office to examine the security of personal financial data at Indian call centers.In the absence of data protection laws, the kind of work that would be outsourced to India in the future would be limited. The effect of this can be very well seen in the health-care BPO business, which is estimated to be worth close to $45 billion. Lack of data protection laws have left Indian BPO outfits still stagnating in the lower end of the value chain, doing work like billing, insurance claims processing and of course transcription. Besides healthcare, players in the retail financial sector are also affected. Financial offshoring from banks is limited because of statutory compliance requirements and data privacy laws protecting sensitive financial information in accounts. In the Human Resource (HR) domain, there are many restrictions on sharing of personal information. In the medical domain, patient history needs to be protected. In credit card transactions, identity theft could be an issue and needs to be protected. Companies in the banking, financial services and insurance (BFSI) sector and healthcare have excluded applications/processes which use sensitive information from their portfolio for offshoring till they are comfortable about the data protection laws prevalent in the supplier country.Since there is lack of data protection laws in India, Indian BPO outfits are trying to deal with the issue by attempting to adhere to major US and European regulations. MNCs have to comply with foreign Regulations so that they don’t lose on their international partners. There are problems involved in this. Efforts by individual companies may not count for much if companies rule out India as a BPO destination in the first place in the absence of data protection law.Today, the largest portion of BPO work coming to India is low-end call centre and data processing work. If India has to exploit the full potential of the outsourcing opportunity, then we have to move up the value chain. Outsourced work in Intellectual Property Rights (IPR)-intensive areas such as clinical research, engineering design and legal research is the way ahead for Indian BPO companies. The move up the value chain cannot happen without stringent laws. Further, weak laws would act as deterrents for FDI, global business and the establishment of research and development parks in the pharmaceutical industry.Looking to the above scenario, we can say that for India to achieve heights in BPO industry stringent laws for data protection and intellectual property rights have to be made. . Thus, a law on data protection on India must address the following Constitutional issues on a "priority basis" before any statutory enactment procedure is set into motion:(1) Privacy rights of interested persons in real space and cyber space.(2) Mandates of freedom of information U/A 19 (1) (a).(3) Mandates of right to know of people at large U/A 21.Once the data protection rules are enforced in India, companies outsourcing to India are unlikely to dismantle the systems they have in place straightaway, and move data more freely to India. Hence ,the need for data protection laws would win over the confidence of international business partners; protect abuse of information; protection of privacy and personal rights of individuals would be ensured; there would be more FDI inflows, global business and the establishment of research and development parks in the pharmaceutical industry & impetus to the sector of e-Commerce at national and international levels would be provided.Data protection law in India (Present status):-Data Protection law in India is included in the Act under specific provisions. Both civil and criminal liabilities are imposed for violation of data protection.(1) Section 43 deals with penalties for damage to computer, computer system etc.(2) Section 65 deals with tampering with computer source documents.(3) Section 66 deals with hacking with computer system.(4) Section 72 deals with penalty for bsignNow of confidentiality and privacy. Call centers can be included in the definition of ‘intermediary’and a ‘network service provider’ and can be penalized under this section.These developments have put the Indian government under pressure to enact more stringent data protection laws in the country in order to protect the lucrative Indian outsourcing industry. In order to use IT as a tool for socio-economic development, employment generation and to consolidate India’s position as a major player in the IT sector,amendments to the IT Act, 2000 have been approved by the cabinet and are due to be tabled in the winter session of the Parliament.Proposed amendments:-The amendments relate to the following[22]:(i) Proposal at Sec. 43 (2) related to handling of sensitive personal data or information with reasonable security practices and procedures.(ii) Gradation of severity of computer related offences under Section 66, committed dishonestly or fraudulently and punishment thereof.(iii) Proposed additional Section 72 (2) for bsignNow of confidentiality with intent to cause injury to a subscriber.It is hoped that these amendments will strengthen the law to suffice the need.Data Protection Laws In Order To Invite ‘Data Controllers’.There has been a strong opinion that if India strengthens its data protection law, it can attract multi-national corporations to India. India can be home to such corporations than a mere supplier of services.In fact, there is an argument that the EU’s data protection law is sufficient to protect the privacy of its people and thus lack of strong protection under Indian law is not a hindrance to the outsourcing industry. To enumerate, consider a company established in EU (called the ‘data controller’) and the supplier of call center services (‘data processor’) in India. If the data processor makes any mistake in the processing of personal data or there are instances of data theft, then the data controller in the EU can be made liable for the consequences. The Indian data processor is not in control of personal data and can only process data under the instructions of the data controller. Thus if a person in EU wants to exercise rights of access and retrieve personal data, the data controller has to retrieve it from the data processor, irrespective of where the data processor is located. Thus a strong data protection law is needed not only to reinforce the image of the Indian outsourcing industry but also to invite multi-national corporations to establish their corporate offices here.Data Protection And TelemarketingIndia is faced with a new phenomenon-telemarketing. This is facilitated, to a large extent, by the widespread use of mobile telephones. Telemarketing executives, now said to be available for as low as US $70 per month, process information about individuals for direct marketing. This interrupts the peace of an individual and conduct of work. There is a violation of privacy caused by such calls who, on behalf of banks, mobile phone companies, financial institutions etc. offer various schemes. The right to privacy has been read into Article 21, Constitution of India, but this has not afforded enough protection. A PIL against several banks and mobile phone service providers is pending before the Supreme Court alleging inter alia that the right to privacy has been infringed.The EC Directive confers certain rights on the people and this includes the right to prevent processing for direct marketing. Thus, a data controller is required not to process information about individuals for direct marketing if an individual asks them not to. So individuals have the right to stop unwanted marketing offers. It would be highly beneficial that data protection law in India also includes such a right to prevent unsolicited marketing offers and protect the privacy of the people.Data Protection With Regard To Governance And PeopleThe Preamble to the Act specifies that, the IT Act 2000, inter alia, will facilitate electronic filing of documents with the Government agencies. It seeks to promote efficient delivery of Government services by means of reliable electronic records. Stringent data protection laws will thus help the Government to protect the interests of its people.Data protection law is necessary to provide protection to the privacy rights of people and to hold cyber criminals responsible for their wrongful acts. Data protection law is not about keeping personal information secret. It is about creating a trusted framework for collection, exchange and use of personal data in commercial and governmental contexts. It is to permit and facilitate the commercial and governmental use of personal data.The Data Security Council of India (DSCI) and Department of Information Technology(DIT) must also rejuvenate its efforts in this regard on the similar lines. However, the best solution can come from good legislative provisions along with suitable public and employee awareness. It is high time that we must pay attention to Data Security in India. Cyber Security in India is missing and the same requires rejuvenation. When even PMO's cyber security is compromised for many months we must at least now wake up. Data bsignNowes and cyber crimes in India cannot be reduced until we make strong cyber laws. We cannot do so by mere declaring a cat as a tiger. Cyber law of India must also be supported by sound cyber security and effective cyber forensics.Indian companies in the IT and BPO sectors handle and have access to all kinds of sensitive and personal data of individuals across the world, including their credit card details, financial information and even their medical history. These Companies store confidential data and information in electronic form and this could be vulnerable in the hands of their employees. It is often misused by unsurplous elements among them. There have been instances of security bsignNowes and data leakages in high profile Indian companies. The recent incidents of data thefts in the BPO industry have raised concerns about data privacy.There is no express legislation in India dealing with data protection. Although the Personal Data Protection Bill was introduced in Parliament in 2006, it is yet to see the light of day. The bill seems to proceed on the general framework of the European Union Data Privacy Directive, 1996. It follows a comprehensive model with the bill aiming to govern the collection, processing and distribution of personal data. It is important to note that the applicability of the bill is limited to ‘personal data’ as defined in Clause 2 of the bill.The bill applies both to government as well as private enterprises engaged in data functions. There is a provision for the appointment of, “Data Controllers”, who have general superintendence and adjudicatory jurisdiction over subjects covered by the bill. It also provides that penal sanctions may be imposed on offenders in addition to compensation for damages to victims.The stringency of data protection law, whether the prevailing law will suffice such needs, whether the proposed amendments are a welcome measure, whether India needs a separate legislation for data protection etc are questions which require an in-depth analysis of the prevailing circumstances and a comparative study with laws of other countries. There is no consensus among the experts regarding these issues. These issues are not in the purview of this write-up. But there can be no doubt about the importance of data protection law in the contemporary IT scenario and are not disputable.
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What is signature edition in laptop?
Where can you buy a PC without the bloatware, shovelware, or adware ? Microsoft has an answer for you: its little-known Signature Edition laptops.For only a few dollars more than what you’d pay for a laptop from Asus, Dell, Lenovo, or other manufacturers, Microsoft offers a stripped-down notebook with just the latest version of Windows on board, which it claims is “tuned for performance.”“When you buy a new PC at Microsoft Store, we ensure there’s no third-party junkware or trialware installed,” Microsoft’s Signature Edition Web site says.Toolbars, spyware, utilities and other unwanted apps reside on your hard drive in typical boxed computers, periodically popping up ads and/or enticements for you to subscribe to their services. They also can slow down your PC with hidden processes that run in the background.Microsoft’s Signature Editions fill an odd niche in the computing universe, offering a product that the computer manufacturers themselves don’t deliver: a “clean,” optimized PC. In effect, the Signature Edition is the Google Nexus brand of the PC world, presenting Microsoft’s operating system in the best possible light. But instead of one or two Nexus phones or tablets, Microsoft handpicks some of the best PCs: We counted sixteen mainstream laptops and eight additional gaming PCs on the site. Microsoft’s Surface PCs also ship without bloatware installed.A clean PC, a competitive priceEven better, Microsoft offers a competitive price for its services. For example, Dell charges $799 for a Inspiron 13 7000 Series 2-in-1 PC, while Microsoft charges $829 for the same laptop with identical specs. Microsoft support staff say that PCs they sell come with a one-year manufacturer warranty, and a Microsoft Complete service package extends that for an additional two years, complete with Answer Desk support and protection from accidental damage.Rather than bundling in time-limited free trial for third-party antivirus solution, Signature Edition PCs ship with Windows Defender, Microsoft's own antivirus/antispyware software—which admittedly falls woefully behind other free antivirus offerings. Windows Defender is enabled by default in Windows 8, but hardware vendors have the option to disable it to include AV trialware. (And if you’re concerned that a Lenovo PC purchased through Microsoft might have Superfish installed—which it doesn’t—Windows Defender now removes it, anyway.)Microsoft’s Signature Edition laptops have actually been sold since May of 2012—almost three years. You can buy them online or in physical Microsoft Stores, meaning that you can test-drive that new PC yourself, just like at a Best Buy or other computer store. Microsoft used to offer a service where you could bring in a Windows 7 PC and have them essentially convert it to a “Signature Edition” PC for $99; a Microsoft Store representative said that policy is not formally in place, but that in-store techs will also assist with removing bloatware as well as viruses.Why this matters: Let’s face it: Buying a computer in an electronics store stinks. Not only will you be pressured into buying a service contract, but you’ll need to weed out all the unwanted programs that your new PC ships with. Microsoft doesn’t offer very many budget PCs, and its physical stores aren’t that easily found. Still, the Signature Edition laptops offer a shopping experience that’s pretty darn appealing.
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What are the illnesses that can be reliably detected by odor?
Just analyze someone's breath, mucus, saliva, sweat or urine and diagnose whether they have diabetes, cancer, COPD, IBD, Clostridium difficile infection (CDI), Tuberculosis (TB), or any other disease for that matter. Now that would be a seismic revolution in medicine. For one, fully non-invasive in complete contrast to the present-day staples, needles and blood draws, and the pain and fear they entail. Could also be done as often as possible, even when asleep or anesthetized during surgery, even in real-time, as point-of-care, i.e., truly portable and thus truly mobile. Underlying idea is the body's physiological emanations reliably communicate unique signatures of underlying diseases in the form of singular mixes of volatile organic compounds (VOCs), i.e., the human 'volatilome'. The reality, OTOH, is a sharp, painful thud since the ground reality is one where most of these possibilities remain not even remotely feasible in the near future.Volatilome historians point to the French chemist, Antoine Lavoisier, as the modern inspiration for diagnosis using exhaled breath (1). He showed the body produces and exhales carbon dioxide. In turn this became the basis for Capnography, monitoring the concentration pressure or partial pressure of carbon dioxide in respiratory gases, the most common breath test. Antiquated roots notwithstanding, using unique signatures from breath and other emanations for disease diagnosis still remains deep in research mode and far from much practical utility. A 2014 review lists a total of only 7 US FDA-approved breath-related tests (see below from 2).Obstacles To Widespread Non-invasive Sampling of Body Emanations For Disease DiagnosisI. Unlike Animal Olfaction, Human Technology's Remained Too Constrained In Choice Of What To AnalyzeDefault, standard analytical approach to sampling and analyzing compounds present in emanations is to rely on 'headspace' analysis (3, see below from 4), jargon that means sampling what is already in the gas phase, i.e., already volatile in the material, rather than attempt to extract compounds of interest from it.Problem is this can cut off too thin a slice of the pie. This shows up in the results since technical approaches continue to fail to mimic what animals do so effortlessly when they use smell to communicate, forage and assess the health of those around them. This brings us to animals and their remarkable capacity to sniff out disease so much so that anecdotal reports suggest they can even be far more accurate in diagnosing human diseases compared to human technologies.Two diseases with substantial research on animals successfully sniffing them out in humans are Skin Cancers by dogs and TB by Giant African pouched rats.IA. Dogs Can Spontaneously Detect Human Skin Cancer & Can Also Be Trained To Detect Clostridium difficile infection (CDI)In 1989, the Lancet published what is perhaps the first modern report of a dog sniffing out its owner's melanoma (See below from 5)In 2001, a follow-up anecdotal study (6) added two other case reports of dogs accurately sniffing out skin cancer lesions,One, a London, UK report on Parker, a pet labrador who sniffed it out on a 66 year old man's left thigh. The patient had developed an eczema patch there. Treated unsuccessfully by topical steroids and antifungals, it grew slowly over 18 years. In 1994, Parker became a family member. Around 1999, Parker started to persistently push his nose against the patient's trouser leg and sniff the lesion beneath it, i.e., could smell something about the lesion even through clothing. This induced the patient to re-consult his family physician. The lesion was excised in September 2000 and histology showed it to be a fully excised basal cell carcinoma. Once lesion was fully removed, Parker no longer showed interest in that area.The other, by George, a Florida, USA, K-9 unit schnauzer trained by his retired handler to recognize in vitro malignant melanoma samples. A local dermatologist had read the original 1989 Lancet case report and teamed up with the handler to see if such a result was repeatable with another dog. When George was introduced to a patient with several moles considered cancer-free, he went 'crazy' over one particular mole, which when excised confirmed 'early malignant disease'.Authors of this second case report speculated dogs might also be able to detect odors associated with specific diseases such as TB and Ebola.In 2012, The BMJ published a proof of principle study on Cliff, a 2 year old beagle trained to sniff out human Clostridium difficile infection (CDI) remarkably accurately (7).Such reports have provoked more systematic studies, which conclude that dogs could detect unique odors emanating from human melanoma and other cancers (8, 9, 10).Problem is clinical scope for using dogs to diagnose diseases is limited given the costs, effort, space and time required to train sniffer dogs to detect various diseases (11).IB. Giant African Pouched Rats Can Be Trained To Reliably Detect Human Tuberculosis (TB)Used to diagnose lung TB in resource-poor settings, the antiquated microscopic Ziehl–Neelsen stain is a standard method for detecting Mycobacterium tuberculosis in Sputum (coughed up mucus). A few studies suggest trained Giant pouched rat are not just as sensitive and accurate but also able to process >50 times more samples per day compared to a lab technician, i.e., much more economical (12). The WHO recommends microscopists not analyze more than an average of 20 samples per day to minimize misdiagnoses (13) while two trained giant African pouched rats could signNow a total of 70 consensus results in 32 minutes over 2 sessions each. This means trained rats could screen larger populations in a much shorter time meaning faster TB diagnoses and hence potential for reduced TB transmission, i.e., a potentially enormous public health benefit.The video below shows how the Belgian social enterprise APOPO trains these rats in Tanzania to accurately diagnose TB from human samples.II. Inadequate Research Efforts To Deconstruct The Human VolatilomeClearly animals are able to smell broader, more complex mix of volatile chemicals that the most sophisticated chemical extraction techniques used in volatilome analysis miss (3). In order for technologies to be able to replicate what animals seem to do so effortlessly, research needs to systematically unravel the human volatilome and establish a reference base of what that looks like in health in order to be able to discern and diagnose cause of ill-health simply from analyzing someone's emanations.What compounds are present in normal breath, urine, skin emanations, saliva, blood and feces? A compendium of the healthy human volatilome was first described only in 2014 (14), meaning a foundational study has come along only in the very recent past. This study is foundational for the following reasons,It identified compounds in breath (874), urine (279), skin emanations (504), saliva (353), blood (130), feces (381).It classified these compounds by their CAS Registry Number (CAS), unique numerical identifier assigned to every chemical substance described in the published scientific literature.Hundreds of peer-reviewed scientific papers are routinely published on the human volatilome. Problem is there is as yet no standardization of procedures or data reporting. As a result, the literature is awash in duplicates.Does exhaled breath really have ~3000 different compounds? Umm, looks like it's less than a fourth of that.This 2014 paper (14) is thus the first step in the right direction, namely to consolidate, synthesize and whittle down published information into a potentially universal 'megatable' of compounds present in healthy human emanations.III. Too Much Technical Sensitivity Can Sometimes Be Too Much Of A Good ThingIterations over decades have vastly improved sensitivity of state-of-the-art volatilome analysis methods like Gas chromatography–mass spectrometry (GC-MS) and Proton-transfer-reaction mass spectrometry (PTR-TOF-MS), Selected-ion flow-tube mass spectrometry (SIFT-MS) and other techniques such that they can easily measure ~1000 compounds.Problem is most volatilome studies investigate a handful of subjects, not the thousands necessary to validate variables that are different between those with or without diseases.One review (1) suggests number of subjects should be >5X the number of analytes measured, clearly something that adds prohibitive cost to such studies but not doing so increases chances for what they call 'voodoo correlations', an issue compounded by dividing test populations further into sub-groups.Volatilome data are also not standardized, neither are the procedures (1, 3, 14, 15, 16, 17, 18). This makes meta-analyses, i.e., comparison of data across multiple studies, well-nigh impossible.As with so many topics in biomedical research, human volatilome studies have heretofore paid scant attention to human Microbiota (19), how it shapes the human volatilome and how that process not only differs between health and disease but also yields different outcomes, i.e., different volatile signatures (1, 3).That said, there are several diseases with candidate volatile biomarkers that await final validation (see tables below from 20). The sky's very much the limit for diagnosing diseases through their distinctive odors.Bibliography1. Amann, Anton, et al. "The human volatilome: volatile organic compounds (VOCs) in exhaled breath, skin emanations, urine, feces and saliva." Journal of breath research 8.3 (2014): 034001.2. Amann, Anton, et al. "Analysis of exhaled breath for disease detection." Annual Review of Analytical Chemistry 7 (2014): 455-482.3. Kimball, Bruce A. "Volatile metabolome: problems and prospects." (2016). http://www.future-science.com/do...4. Restek, A. "Technical Guide for Static Headspace Analysis Using GC." Restek Corp (2000): 11-12. http://www.restek.com/pdfs/59895...5. Williams, Hywel, and Andres Pembroke. "Sniffer dogs in the melanoma clinic?." The Lancet 333.8640 (1989): 734.6. Church, John, and Hywel Williams. "Another sniffer dog for the clinic?." The Lancet 358.9285 (2001): 930. http://www.thelancet.com/pdfs/jo...7. Bomers, Marije K., et al. "Using a dog’s superior olfactory sensitivity to identify Clostridium difficile in stools and patients: proof of principle study." (2012): e7396. http://www.bmj.com/content/bmj/3...8. Pickel, Duane, et al. "Evidence for canine olfactory detection of melanoma." Applied Animal Behaviour Science 89.1 (2004): 107-116. http://sniffoutcancer.org/images...9. Moser, Emily, and Michael McCulloch. "Canine scent detection of human cancers: a review of methods and accuracy." Journal of Veterinary Behavior: Clinical Applications and Research 5.3 (2010): 145-152. https://www.researchgate.net/pro...10. Jezierski, Tadeusz, et al. "Study of the art: canine olfaction used for cancer detection on the basis of breath odour. Perspectives and limitations." Journal of breath research 9.2 (2015): 027001. https://www.researchgate.net/pro...11. Buljubasic, Fanis, and Gerhard Buchbauer. "The scent of human diseases: a review on specific volatile organic compounds as diagnostic biomarkers." Flavour and Fragrance Journal 30.1 (2015): 5-25.12. Mgode, Georgies F., et al. "Diagnosis of tuberculosis by trained African giant pouched rats and confounding impact of pathogens and microflora of the respiratory tract." Journal of clinical microbiology 50.2 (2012): 274-280. Diagnosis of Tuberculosis by Trained African Giant Pouched Rats and Confounding Impact of Pathogens and Microflora of the Respiratory Tract13. World Health Organization, et al. "Management of tuberculosis: training for district TB coordinators." (2005). http://apps.who.int/iris/bitstre...14. de Lacy Costello, Ben, et al. "A review of the volatiles from the healthy human body." Journal of breath research 8.1 (2014): 014001. https://www.researchgate.net/pro...15. Pereira, Jorge, et al. "Breath analysis as a potential and non-invasive frontier in disease diagnosis: an overview." Metabolites 5.1 (2015): 3-55. Breath Analysis as a Potential and Non-Invasive Frontier in Disease Diagnosis: An Overview16. Boots, Agnes W., et al. "Exhaled molecular fingerprinting in diagnosis and monitoring: validating volatile promises." Trends in molecular medicine 21.10 (2015): 633-644. https://www.breathcloud.org/wp-c...17. Bikov, Andras, Zsófia Lázár, and Ildiko Horvath. "Established methodological issues in electronic nose research: how far are we from using these instruments in clinical settings of breath analysis?." Journal of breath research 9.3 (2015): 034001.18. Scarlata, Simone, et al. "Exhaled breath analysis by electronic nose in respiratory diseases." Expert review of molecular diagnostics 15.7 (2015): 933-956.19. Dietert, Rodney Reynolds, and Ellen Kovner Silbergeld. "Biomarkers for the 21st century: listening to the microbiome." Toxicological Sciences (2015): kfv013. Listening to the Microbiome20. Kataoka, Hiroyuki, et al. "Noninvasive analysis of volatile biomarkers in human emanations for health and early disease diagnosis." Bioanalysis 5.11 (2013): 1443-1459. https://www.researchgate.net/pro...Thanks for the R2A, Jonathan Brill.
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What phrase will instantly clear out a room of people from your profession?
Mr SandsThe code phrase "Mr. Sands" was used in theatres, where sand buckets were used to put out fires, as a code for fire. The word "fire" backstage would cause alarm to either performers or the audience.I worked in a cinema in Edinburgh and I heard this, no one had ever told me what it was for, but the place cleared out.There are quite a few other interesting code your may or may not know about:Cruise ship codes"Operation Bright Star" -signals a medical emergency."Operation Rising Star" means a passenger has passed away.“PVI", which stands for "public vomiting incident", or "30-30", which is used by some cruise lines to ask for staff to assist with cleaning up a mess.Code Red - Outbreak of norovirus or illness. It means the ship must undergo deep cleaning and sick passengers should stay in their rooms. Code Green and Code Yellow indicate less severe problems.Mr Skylight; Alpha, Alpha, Alpha; Code Blue; or Star Code, Star Code, Star Code - Medical emergencyMr Mob or Oscar, Oscar, Oscar - Man overboardCharlie, Charlie, Charlie - Security threatEcho, Echo, Echo - Possible collision with another ship, or in other cases a warning of high winds.Red Parties, Red Parties, Red Parties; Alpha Team, Alpha Team, Alpha Team or Priority 1 - Possible fire on boardBravo, Bravo, Bravo - Fire or other serious incident.Delta - Damage to the ship.Papa - Pollution or oil spill.Priority 2 - Leak.Kilo - all staff to report to emergency posts.A fire or emergency may simply be indicated by a ringing of the general alarm bell. Seven or more short blast of the ship's whistle, followed by one long blast, means passengers should assemble at their muster stations.London Underground announcementsThe best known code is "Inspector Sands", or simply "Mr Sands", which refers to a potential emergency such as a fire or bomb scare. It is used on the Tube, as well as the wider UK rail network and at theatres ("Sands" because buckets of sand would be used to put out the fire).The numbered codes are nothing to be alarmed about, and simply refer to cleaning jobs.Code 1 - BloodCode 2 - Urine/FaecesCode 3 - VomitCode 4 - SpillageCode 5 - Broken GlassCode 6 - LitterCode 7 - Anything that doesn't fit into these categoriesAirport emergenciesCode Bravo - general security alert at an airport. Security officials will typically yell it at travellers, and may order them to "freeze!", to deliberately scare them and make it easier to pinpoint the source of the threat. More often than not, it will probably be a drill - as this amusing account explains.Code Adam may be used to alert staff of a missing child.Aircraft emergenciesMayday - which means an aircraft or ship is facing imminent danger. Fewer will know about pan-pan (from the French:panne, meaning a breakdown), which refers to a slightly less grave danger.7500 is a transponder code which means an aircraft has been, or is threatened with, hijacking.7700 is a more general emergency code; 7600 indicated a radio failure.Cabin crew jargonNot emergencies, but might be interesting:Arm and crosscheck - Prior to departure, the plane exits are put into emergency mode. If an "armed" door is opened, the emergency slide will inflate. The cabin crew will "crosscheck" to ensure that the opposite doors have been armed. Upon arrival, you're likely to hear "doors to manual".Debrief - Every little detail of every flight is recorded on the “debrief” - including medical situation, disruptive passengers or a catering problem.Hat bin - Another term for the overhead bins ("Why are these called hatbins? Surely they’re not used for hats? Well, in the 1960s, when flying was extremely glamorous, they actually were.")Hot bit - The heated part of an in-flight meal.Gash bag - The rubbish bag. ("Another military term, apparently if you were the gash man in the navy you got all the rubbish jobs").Landing lips - "That last slick of lippie we apply to look fresh as a daisy before we land."Plonkey kits - A bag of essentials carried by flight attendants. ("Apparently this originates from the ships’ galleys. Ours tend to contain ice tongs, oven gloves, small clippers, a sewing kit and a clothes brush".)Starburst - "You’ll see this happen when a service is started in the middle of the cabin and the trolleys work out towards the galleys."Pilot speakAll-call - "A request that each flight attendant report via intercom from his or her station - a sort of flight attendant conference call."Last-minute paperwork - "The flight is ready for pushback - then comes the wait for 'last minute paperwork'. Usually it’s something to do with the weight-and-balance record, a revision to the flight plan, or waiting for the maintenance guys to deal with a write-up and get the logbook in order."Flight level - "A fancy way of telling you how many thousands of feet you are above sea level. Just add a couple of zeroes. Flight level three-three zero is 33,000 feet."Thanks to Jim Lux for a better explanation:Flight Level is slightly different than altitude with a couple zeros removed. For altitude, you set the altimeter to the current barometric pressure, so it’s the actual heigh above sea level. FL is always done with the altimeter set to 29.92″, so the actual altitude(e.g. reported by GPS) will be a bit different. The actual term is “pressure altitude”.As long as everyone does the same thing, nobody runs into each other.Ground stop - "This is when departures to one or more destination are curtailed by air traffic control, usually due to a traffic backlog."EFC time - "The expect further clearance time, sometimes called a release time, is the point at which a crew expects to be set free from a holding pattern."Deadhead - "A deadheading pilot or flight attendant is one repositioning as part of an on-duty assignment. This is not the same as commuting to work or engaging in personal travel."Gatehouse - "An idiosyncratic way of saying the gate area or boarding lounge."Ramp - The aircraft parking zones.Alley - A taxiway.Apron - "Any expanse of tarmac that is not a runway or taxiway - areas where planes park or are otherwise serviced."At this time - "Example: 'At this time, we ask that you please put away all electronic devices'. Meaning: now, or presently. This is air travel's signature euphemism."
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