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Convert eSignature Form Computer. Discover by far the most consumer-pleasant exposure to airSlate SignNow. Manage all of your papers handling and sharing method digitally. Range from hand-held, paper-structured and erroneous workflows to computerized, computerized and perfect. You can easily generate, produce and indication any documents on any system everywhere. Be sure that your important company circumstances don't move overboard.
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FAQs
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How do you collect data?
Data collection is a method of gathering information in a way that allows businesses to address questions and predict future trends to make more effective decisions. Data collection is essential for credible research and business decisions.Data collection is a method of gathering information in a way that allows businesses to address questions and predict future trends to make more effective decisions. Data collection is essential for credible research and business decisions.Methods:Primary data collection:Quantitative: mathematical calculations, etc.Ex: black-and-white answer questionnaires; mean, median, mode, etc.Qualitative: use of non-quantifiable information (i.e. emotions, etc.)Ex: open-ended questionnaires, case studies, interviews, etc.Secondary data collection:Ex: publication date, depth of analyses, reliability of sources, etc.One type of data collection is market research. There are several data collection and market research analysis tools that you can use for online markets in particular. One great tool for online markets is Algopix. Algopix is a software that does product market research for Amazon, Walmart, & eBay Sellers. Using an algorithm, it analyzes market demand, possible margins, and shipping costs for current and future inventory. For consumers with large volume selling, Algopix has a bulk product analysis feature that allows the user to upload a spreadsheet with all the proper information of up to 3,000 products, which they then prepare a complete analysis for each product including shipping costs, possible revenues, demand, and much more. It saves time and makes it easy to manage your inventory as well as enter new markets.Algopix also has several tools that help sellers determine which market platform would be most beneficial to them. Such tools include an FBA fee calculator for Amazon, eBay category tree, online ASIN to ISBN converter, and a lot more. It is definitely one of the best market research analysis tools for online marketplaces.
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What is signNow used for?
Acrobat DC is the current incarnation of the venerable Acrobat line. signNow introduced PDF to the world way back in 1992. DC stands for “Document Cloud,” which is the larger set of tools related to PDF and business process that includes PDF. These tools include Acrobat DC and Acrobat Reader DC, signNow, and signNow Scan.Acrobat DC is the too that people use to create and manipulate PDF on their computers. Acrobat DC includes integrations with signNow Cloud Services that can enhance the reading experience, manage Reviews, store and sync documents across all of your reading surfaces, and more. It includes integration with MS Office on the desktop and can also be installed as an O365 extension online.Acrobat Reader DC is the tool on Mac, Windows, iOS and Android that lets you read PDF, convert some documents to PDF (if you also have a Document Cloud subscription), and participate in workflows such as Review or Forms.signNow Scan is a mobile application that lets you convert many types of documents to PDF by taking a photo of it. It uses signNow Sensei to determine the type and structure of the document, too.signNow is signNow’s e-signature platform. It integrates with many business solutions, including Salesforce, Ariba, Workday, and MS Dynamics. It offers robust workflow management for signature-based processes in an easy to use, easy to implement platform.
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Is there a preferred size for e in an RSA cryptosystem?
Better yet, there’s a preferred value: [math]e = 2^{16}+1 (65537)[/math].This “magic exponent” is enshrined in the OpenSSL genrsa(1) man page, along with another much smaller one:-F4|-3 the public exponent to use, either 65537 or 3. The default is 65537.It’s also found in at least one RSA-using RFC—RFC 4871: DomainKeys Identified Mail (DKIM) Signatures:3.3.1. The rsa-sha1 Signing AlgorithmThe rsa-sha1 Signing Algorithm computes a message hash as described in Section 3.7 below using SHA-1 [FIPS.180-2.2002] as the hash-alg. That hash is then signed by the signer using the RSA algorithm (defined in PKCS#1 version 1.5 [RFC3447]) as the crypt-alg and the signer's private key. The hash MUST NOT be truncated or converted into any form other than the native binary form before being signed. The signing algorithm SHOULD use a public exponent of 65537.In fact, it’s such a sacred constant, that if you choose any other exponent, your software could well fail to interoperate with other RSA-using software.But why treat this particular number as RSA magic?Simply put, it balances speed of operation with attack resistance, and therefore falls in the “good enough” category.To quote the introduction to chapter 4 of Dan Boneh’s Twenty years of attacks on the RSA cryptosystem:To reduce encryption or signature-verification time, it is customary to use a small public exponent [math]e[/math]. The smallest possible value for [math]e[/math] is [math]3[/math], but to defeat certain attacks the value [math]e = 2^{16} + 1 = 65537[/math] is recommended. When the value [math]2^{16} + 1[/math] is used, signature verification requires 17 multiplications, as opposed to roughly 1000 when a random [math]e \le \varphi(N)[/math] is used. Unlike the attack of the previous section, attacks that apply when a small e is used are far from a total break.and in section 4.4:When [math]e = 3[/math] the attack can be mounted as long as the pad length is less than [math]1 / 9 th[/math] the message length. This is an important result. Note that for the recommended value of [math]e = 65537[/math], the attack is useless against standard moduli sizes.
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What is the process to file ROC (tax filing) in india?
How to file ROC1) Why we file Return of Companies Because under Companies Act every company is required to file annual return.2) When and what information is required to file.Companies having Share Capital Companies having no share capital Section 159 of Companies Act,1956 Section 160 of Companies Act,1956 within sixty days from the day on which each of the annual general meetings within sixty days from the day on which each of the annual general meetings regarding - (a) its registered office, (b) the register of its members, (c) the register of its debenture holders, (d) its shares and debentures, (e) its indebtedness, (f) its members and debenture holders, past and present, and (g) its directors, managing directors, managers and secretaries, past and present (a) the address of the registered office of the company; (b) the names of members and the respective dates on which they became members and the names of persons who ceased to be members since the date of the annual general meeting of the immediately preceding year, and the dates on which they so ceased; (c) all such particulars with respect to the persons who, at the date of the return, were the directors of the company its manager and its secretary.4) What is annual return.The Companies Act, 1956 are required to e file the following documents with the Registrar of Companies (ROC): Document Form No Filled by Companies Other things With Share Capital Without Share Capital Balance Sheet 23AC Yes Yes Form 23AC-XBRL : For filing Balance Sheet in XBRL format Profit & Loss Account 23ACA Yes Yes Form 23ACA-XBRL : For filing Profit & Loss Account Annual Return 20B Yes -- Only for Company having Share Capital Annual Return 21A -- Yes Only for Company not having Share Capital Compliance Certificate 66 Yes -- Only for Company having Share Capital Having paid up capital of Rs. 10 lakh - Rs. 2 crore.5) What is XBRL format and who will select XBRL format XBRL stands for eXtensible Business Reporting Language.Mandatory for following:- - All companies listed with any Stock Exchange(s) in India and their Indian subsidiaries - All companies having paid up capital of Rupees five crore and above - All companies having turnover of Rupees one hundred crore and above - All companies who were required to file their financial statements for FY 2010-11 using XBRL. - Whose accounting year commences on or after 01.04.20116) Where to download the forms The forms can be downloaded from MCA site. The following link may be used to download the forms:-http://www.mca.gov.in/MCA21/dca/...7) Steps to how to fill the forms -Download the form - Must have an Internet Connection to fill the form - Enter the CIN and click the Pre Fill Button. Your computer should be connected to the Internet and then some of the fields will be automatically filled like company name, registered address etc. - Fill up the rest of the fields in the eForm and attach the applicable attachments. - The size of the e Form including all the attachments should not exceed 2.5 MB. If the file size of Form 23AC exceeds 2.5MB, please use Additional Attachment Sheet - After filling other required fields, use Check Form button. If you have not filled all the required data, the system will alert you about the same. - Click the signature box in the e-form and affix the digital signature certificate by using the 'Sign and Save As' option. - Click on the Pre-scrutiny button. Make sure that your computer is connected to the Internet. System shall alert you if there are any errors. - Once Pre Scrutiny is successful the system will lock the form. Pre Scrutiny will not be successful if the size of the form exceeds 2.5 MB. Any change after successful Pre Scrutiny can only be done after using Modify Button. - Whenever you make a rectification in the e Form, you are always required to do pre scrutiny again. Important Points to Remember while E Filling a. Balance Sheet and Profit & Loss Accounts are to be filed as two separate documents with different e-Forms b. Each e-Form along with the relevant attachment(s) should be less than 2.5 MB c. The Balance Sheet, Profit & Loss Account and Annual Return are filed as attachments to the respective e-Forms. A scanned copy considerably increases the size of the document besides being more expensive. You are therefore, advised to convert the Text file/ Excel sheets by using the PDF converter software (PDF conversion facility is also available on the MCA portal for business users) and upload these attachments as PDF documents d. The MCA database in respect of Authorized Capital and Paid-up Capital needs to be verified by the respective Companies, as it may not be correct. The Companies are requested to apply for correction of Master Data, should they find any discrepancies. In the meantime, the Companies can declare the correct amount of Authorized Capital and Paid-up Capital in the respective annual filing Forms.8) Revision of Annual E FillingYes, except Form 23AC and 23ACAhttp://wazzeer.com
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Where can we use class 2 and class 3 digital signature certificates?
Click here for Digital Signature CertificateDigital signature certificates or DSC are required for filing income tax returns, company filings, import export clearance and e-tenders.A Digital Signature is the equivalent of a physical signature in electronic format, as it establishes the identity of the sender of an electronic document in the Internet. Digital Signatures are used in India for online transactions such as Income Tax E-Filing, Company or LLP Incorporation, Filing Annual Return, E-Tenders, etc., There are three types of Digital Signatures, Class I, Class II and Class III Digital Signature. Class I type of Digital Signatures are only used for securing email communication. Class II type of Digital Signatures are used for Company or LLP Incorporation, IT Return E-Filing, Obtaining DIN or DPIN, and filing other forms with the Ministry of Corporate Affairs and Income Tax Department. Class III type Digital Signatures are used mainly for E-Tendering and for participating in E-Auctions. Digital Signatures come in the form of a USB E-Token, wherein the Digital Signature Certificate is stored in a USB Drive and can be accessed through a computer to sign documents electronically.With E-Return filing becoming mandatory for Income Tax Assesses with an income of over Rs.5 lakhs per annum, the requirement and prevalence of Digital Signatures has increased manifold. IndiaFilings can help you obtain your Digital Signature hassle-free online. IndiaFilings is a Registered Partner of SIFY and E-Mudhra.Class II Digital Signatures are used for Income Tax E-Filing, Company or LLP Incorporation, Annual Return Filing, etc., Class II Digital Signatures are required to file documents electronically with the Ministry of Corporate Affairs and Income Tax Department.Difference between Class 2 and Class 3 Digital Signature CertificatesIn this day and age of technology, physical signatures are increasingly being converted to digital media for security reasons. Digital Signature Certificates, (DSC) are simply the electronic equivalent of physical or paper certificates such as identity proofs, driver�s licenses, passports or PAN cards. These certificates can prove to be helpful for many online transactions that require digital proof of identities and to receive and send information on the web safely.Organizations and firms, today require digital signature certificate to better facilitate communication and transactions between them and the Ministry of Corporate Affairs. For companies that have a turnover of more than INR 60 Lakhs have to apply for these certifications mandatorily, and it is considered a legally admissible instrument. Besides, it is always wise to get a digital signature as it offers a high level of security for online transactions by ensuring absolute privacy of the information exchanged. These certificates can also be useful for encrypting information that only the intended recipient can have access to. You can digitally sign information to assure the recipient that it has not been changed in transit, and also verify your identity as the sender of the message.There are two main types of Digital Signature Certificates � Class 2 Certificates and Class 3 Digital Signature Certificate. A Class 2 Digital Signature Certificate is used by individuals and is available for download after verification based on a trusted and pre-verified database. A Class 3 Digital Signature Certificate, on the other hand, is of the highest level as it is issued only after the registrant�s identity verification has been carried out by a Registration Authority.Class 2 Digital Signature Certificates are generally used for filing documents Income Tax, Registrar of Companies and VAT, whereas Class 3 Digital Signature Certificates are needed for e-tendering, which is a procurement process that is conducted online. The aspects where this comes into play include: � Contract download� Evaluation of tenders (May or may not involve e-auctions)� Supplier registration/expression of interest� Submission of bid documentThe Ministry of Company Affairs, Government of India (GoI) has initiated MCA21 program, for easy and secure access to its services in a manner that best suits the businesses and citizens. The MCA21 application is designed to support Class 2 & 3 Digital Signature Certificates (DSC) issued by licensed signNowing Authority under Controller of signNowing Authorities.
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What is the difference between class 2 and class 2B digital signature?
Class 2 Digital Signature Certificate can be issued to individual or an authorized individual on the behalf of any organization. Class 2 Digital Signature Certificate is available for download after verification based on a trusted and pre-verified databaseWhereas Class 2B Digital signature certificates are issued to Organization for various purposes. Class 2B digital signatures for organization is personal certificate that provides second highest level of assurance within the RCAI hierarchy setup by CCA (Controller of signNowing Authorities) in India which is mainly used for e tender filing, E Procurement, E Bidding, Bank Auction and Document Signing.
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Is the cryptocurrency Bitcoin a good idea?
Yes.Here’s the problem: most people who know a lot about Bitcoin can only speak “tech”.I was at a conference recently. I was the keynote speaker but had zero talk prepared (as usual). It was a crowdfunding conference so I “crowdsourced” my talk.I asked the audience: I can talk about entrepreneurship or I can take fifteen minutes to explain Bitcoin without using any technical jargon. Clap for which one you want.Almost 100% of the people wanted to learn about Bitcoin without the technical jargon.People are hungry for this. They don’t want to hear about “crypto” or “blockchain”. They just want to know what all this Bitcoin stuff is about.Back in 2013, I thought Bitcoin was a scam. I was wrong.First, some credentials.In early 2013 I had my doubts. I started reading everything I could. Then I got my hands dirty.I’ve been a coder / programmer since 1985. I decided to code up a Bitcoin only store (maybe the first ever) and sell my book, “Choose Yourself” on it before it was released on Amazon.It was very hard. I had to develop the store from scratch since there were no easy tools to help me. There still isn’t (hint: business opportunity).Once I launched it, quite a few people bought my book. I sold a PDF of my book for 0.1 Bitcoin. Bitcoin was then $60 so I sold it for about $6 per PDF. Right now, it’s as if I sold each PDF for $1600. I sold many copies.I went on CNBC when they heard I was doing this. The anchor asked me, “Did you just do this for publicity?”I said, “Well, I’m on national TV so I guess it worked.”Another thing worth noting: Most of my customers came from one domain name (they had to submit their email addresses for me to process the sale): Amazon.com. Make of that what you will.A few months ago I started writing about cryptocurrencies again. I saw so many people getting involved in scams, I wanted to help.The other day I had an Uber driver who thanked me during the car ride for helping him “get it”.And last night at a restaurant, the waiter at the end of the meal shook my hand and thanked me for helping him “finally” begin to understand what Bitcoin was about.In order for crypto currencies to succeed, people need to understand at a basic level what they are. Nobody needs to learn complicated cryptography or blockchain.Just understand why now. Why this is important for us a society.TWO CRITICAL REASONS BITCOIN IS HISTORICALLY IMPORTANT AND HERE TO STAYJust understand these two reasons. Then you will know the potential for Bitcoin. And you will be popular at cocktail parties.A) THE HISTORY OF MONEYEvery new style of money solves the major problems of the last style of money.BarterIf I have a bag of rice and I need shoes, what if you make shoes but you only need 1/2 bag of rice. Do I get 1/2 a pair of shoes?Barter has a lot of problems. In the above, coming up with the rice to shoes exchange rate is difficult.Then coming up with 1000s of exchange rates just to go out and buy groceries is almost impossible.PLUS, what if you have to move (your kingdom is attacked). How are you going to carry all that rice? All of those shoes?Money has two purposes:as a store of wealth / savingsto make transactionsThere’s a third, which Ray Dalio, the head of the largest hedge fund in the world, Brigewater, told me the other day. But we’ll get to that later.Barter is horrible as a store of wealth. And for transactions, best case it’s very difficult.But problems lead to opportunities. Which leads to…2. PRECIOUS METALS / COINSGold and silver are scarce. It’s hard to mine them.But it’s hard to forge them because you can measure by weight.So the scarcity combined with the lack of forgery makes them good choices for money. I can convert my rice into gold coins, you can convert your shoes into gold coins, and now we can trade and now we can buy whatever we want.(Marcus Aurelius on a gold coin)As a store of wealth, it’s not great but not horrible.If my kingdom is attacked and I have to move, gold and silver are easily stored and carried as designed jewelry.BUT, two problems.One: what if you live in a country that doesn’t have any gold mines. Now you either have to trade for gold or start attacking countries: (this did not work out so well for the Aztecs).Two: What if you wanted to buy a house right now: are you really going to bring a truck of gold bars to the closing? Or if you have to move to another country and you have a lifetime worth of savings: are you going to ship all of your gold bars to your new home?People say that gold is “real” as opposed to (later) paper money and cryptocurrencies.This is not really true. Gold is a rock. But it does have industrial uses (silver is better for this because of price but still…). Gold and silver are great electric conductors, can be used as SILVERware. Can be used as antibiotics (hence great for fillings on teeth).So we can say that gold money is “backed” by something that has real use with value associated with it.But we still have to solve the problems above.3) PAPER MONEY BACKED BY GOLD AND…PAPER MONEYCountries made paper money that was like a contract with the government that all of that money can be converted into gold.This was great for transactions (easy to carry paper money).This was great for store of wealth (put the money in a bank and you can go anywhere). The first banks for paper money backed by gold helped fund every war in Europe in the 1800s. Good job!When paper money is backed by gold it also puts a clamp on inflation. You only have as much paper money in a country as there is gold in that country.(yes, there is a 100,000 dollar bill in the US. Woodrow Wilson is on it).So you can trust the government to not go crazy printing money that is not backed by gold (like German in the 1920s when trillions of Marks were printed and Germany went into an inflationary death spiral that was at least one cause for World War II).BUT, why benefit the countries where gold is easy to mine and punish the countries where gold is hard to mine.Also, the world is expanding in every way: more people, more technology, more innovation, more THINGS.I’m not sure this is a good thing or a bad thing (see: Germany above) but sometimes countries need to balance debt with money printing to manage their fiscal policy.The US went off of gold in the early 70s in order to fund the financial needs of both the Vietnam War and the social improvement programs of Lyndon Johnson.This created inflation.Paper money will often lead to this situation. Someone will say: why do we need the gold part?Again, might be good or bad. There’s a lot of debate. Did money printing save the US in 2008 and 2009? Maybe. Or will their be future problems caused by this? Maybe.Nevertheless, there are other problems with paper money that need to be solved:a. No privacy.If I’m making a sizable (greater than $1000) transaction I’m usually not using cash but either a credit card or a money wire.So that means your bank knows. Other banks know (the bank you are sending money to, the Federal Reserve, the local Reserve bank, etc).Government agencies know (the IRS, the NSA, etc etc).Potentially sites like Google and Amazon know depending on what payment services you use and what you are buying.So you have no privacy on your transactions with paper money.b. Fees.If I send a friend in Korea money, I go through my bank (fee), local reserve bank (fee), Federal Reserve (fee), International wiring system (fee), their central bank (fee), their local reserve bank (fee), their local bank (fee).That’s a lot of fees. Those fees help create inflation because every transaction needs to have a profit on top of those fees.c. Forgery. Something like $200 billion in forged money is circulating right now.d. Human error. This is a CRITICAL problem. There are so many opportunities for human error. When you transfer money, they can send to the wrong account. Or a bank’s software can be hacked and you lose all of your money.Or, most importantly, the Federal Reserve in the US can decide to print another trillion (Like 2009) and, without your permission, the value of your dollar has gone down.In the US we’ve been lucky. But all of South America hasn’t been so lucky (all of their currencies crashed in the 80s. Most of Asia wasn’t so lucky in the 90s (their currencies wiped them out). Russia in 1997 was wiped out.Many countries have relied on humans to print (or not print) money and the slightest human error can wipe out an entire country’s economy.The United States has been lucky. For now. But this is a HUGE error we risk every day.These are the basic problems. There are more (theft, for instance).e. What is backing paper money?Only our trust. I don’t want to be a conspiracy theorist. But the reality is: a dollar is a piece of paper. Just like gold is just a rock.How do they make us trust that the money has value?They put “In God We Trust” on it. They put George Washington. They put the signature of the Secretary of Treasury (pretending it’s a contract.).And, for the weirdos, they even put a pyramid with an eye on it.And that’s supposed to be why we trust it. I don’t trust it.4) BITCOIN (and, btw, Bitcoin is not the end. There will be a “5”).Bitcoin solves the problems above.a. Human error: there is no printing of money. There is a fixed supply of 21,000,000 coins.How do I know this? I’m a skeptic. So I read the software behind Bitcoin. I read it over and over until I could figure it out. In one part of the code they clearly define how many coins can be “mined” / printed (printed is the wrong word but I’m using it here to make the connection with paper money). And there’s another part of the code which “enforces” the first part.(part of the code that limits the total # of bitcoins to 21,000,000. I found this by reading ALL of the code for bitcoin).b. Theft. Like with every other form of currency, an exchange (like a bank) that stores your Bitcoin can be hacked and money stolen.BUT, I only keep a small amount of money in an exchange. You can get a storage drive, store your money, and put it in a safety deposit box. So even if the exchange is attacked, you still have your money.ALL theft can be prevented this way with Bitcoin. You can’t do this with paper dollars because if you have too many dollars, how will you store it? Ditto for gold.c. Forgery. The software guarantees that Bitcoins can’t be forged.d. Privacy. I can send you a Bitcoin and nobody knows who is sending it, who is receiving it, and no government institutions are aware of it.e. Fees.Some bitcoin transactions have small fees. But it’s nothing like the fees of going through six banks in the transaction described above.What’s backing it?There’s about 1000 man-years of science backing Bitcoin.The underlying technology of Bitcoin which involves heavy amounts of cryptography, financial know-how, and basics of contract law, plus the “blockchain” have 100s of use-cases that we have only just begun to play with.EVEN IF Bitcoin is never used as a coin (although note: it’s being used every day as money) there are 100s or 1000s of other uses for Bitcoin that have nothing to do with the basic money use.I won’t get into the weeds here: but suffice to say that ALL of contract law can be (and will be) eventually replaced by Bitcoin.And ALL of logistics will be replaced by Bitcoin (e.g. UPS is replacing all of their internal logistics (tracking millions of packages every day going from millions of locations to millions of other locations) by Bitcoin technology.There’s nothing behind paper money or gold like this.Now…Bitcoin has problems also.Hence the need for other cryptocurrencies. But that’s ok and not the topic for here. Suffice to say, Bitcoin solves all the basic problems of paper money, which solves the problems of gold, which solves the problems of barter.HOWEVER, there is another reason why Bitcoin is here to stay and it’s so compelling.——EVOLUTION OF EVERY INDUSTRYEverything in life evolves. Not only species but ideas.Let’s look at some industries.MEDICINETheism: 500 years ago if you got sick, you’d either pray to a god to get better, go to a shaman, make a sacrifice, or assume you committed a sin that made you sick and would try to undo the sin.Humanism: Post-rennaissance, we had human “experts” called doctors who would either leech us to death, perform horrible surgeries that would kill us, or would pat us on the back, hammer our knee and say, “take two aspirin”.Doctors aren't bad. They’ve saved many many lives. But Humanism has it’s limits. A known fact is that, on average, the moment when a doctor is most effective is his or her first year out of medical school. After that, statistically downhill.Data-ism:Now when if you go to a doctor, you get tests. You get blood work, you get an MRI, an EEG, an X-Ray, the X-Ray might go into a database and an AI algorithm matches it against other X-rays (does it match a tumor X-ray or a non-tumor X-ray?). We even get genetic testing to see if our illness is in our chromosomes.Then, armed with data, often a computer will tell us the correct solution (and even a computer can do the robotic surgery needed), or a human will help interpret the data (but there’s room for human error here).(source: National Genome Research Institute)So Medicine has evolved fromTheism → Humanism → DataismLet’s pick another industry:WARTheism: 3000 years ago if two countries went to war, the kings would perform massive sacrifices to their gods the day before.In the Bible, whosever God was stronger (Baal versus Yahweh being a notable Hebrew battle), that group would win the war.Fragments of this exist right now: May the Force Be With You, said to Luke before he flies out to fight the Death Star.Humanism: For the past 500 years, whoever had the most humans on the ground, the most bullets, then the most planes, then the most bombs. ,would win the war.Data-ism:War is being fought every day now. EVERY SINGLE DAY. Every day, some country tries to bring down the electric grid of Poland.Every day, every Fortune 500 company is attacked by “bot armies” coming from…nobody knows.I’ve been involved in the cyber security space for 25 years or more.I once was talking to a company who helps Fortune 500 companies fight “bot armies”. All of the employees were top Phds who were the experts in their fields.One guy told me, “No matter how smart we are, they are smarter.”Who are “they?” The people making the bot armies. Where do they come from? We don’t know. They come from everywhere. They are just smarter than us.Elections are rigged. Companies are attacked. Information is stolen.We have been in World War III for at least 20 years and it will never end. Dataism has taken over war.Ok…MONEYTheism: “In God We Trust”Humanism: “George Washington”. A picture of Independence Hall. Or the White House. Anything. Anything at all so that we trust humans with what we are given in exchange for the hard labor we do every single day.Do we trust humans? I tend to trust humans. But that is maybe not so smart all of the time. Humans make a lot of mistakes and that’s been the downfall of so many companies, so many families, and so many…everything.Data-ism. Bitcoin and now other cryptocurrencies.1000s of man-years of science. 100,000s of lines of code that has been checked by 10,000s of the best programmers.Data-ism prevents forgery, keeps privacy, re-creates all contract law, avoids fees, avoids theft. And this is just a small sample of what data does for money.“In Data We Trust” for better or worse. But it works.The natural evolution of money has arrived. And it’s not only Bitcoin but other cryptocurrencies.FAQ:Why do we need other Cryptocurrencies?Why do we need more than one currency at all? Why is there a US dollar and a Canadian dollar.FOR NO REASON. Just an artificial border created in 1770 and we have two different currencies.Cryptocurrencies have what I call are “problem borders”.One coin is better than Bitcoin for making contracts (Ethereum).Another coin is better for privacy ((Zcash. A problem with Bitcoin is that although there are no names on a transaction, I can see the size and the time. So privacy is still a slight problem).Another coin might be better for solving a problem of decentralized storage (as opposed to storing all of your photos on one centralizes spot that can be hacked like Google Drive). Bitcoin doesn’t address this problem.Problem Borders create new currencies.Is it too late to invest in Bitcoin and other cryptocurrencies?Right now, this reminds me of the Internet in 1995–6. There’s a bit of irrational exuberance in new coins. Prices are going crazy.There will be a massive pullback. BUT, the legitimate coins are here to stay and will keep going.Amazon, of course, pulled back, when the Internet pulled back. Now it will eventually be a trillion dollar company. Many companies that started in the 90s have survived and thrived and were great long-term investments that have paid off.Cryptocurrencies are the “internet of money”. The internet is here to stay and so is the internet of money.We are only in inning one of the cryptocurrency shift in our money.Will cryptocurrencies replace paper money?Yes. Eventually. It might not be Bitcoin although Bitcoin will always exist.But each country, to solve the problems of paper money, will eventually switch. Countries that are debating it include: Israel, Estonia, Venezuela, Argentina.Countries that will use some aspects of cryptocurrency technology in their central bank will soon include China, Korea, Russia, and yes, the United States.And many countries will reject cryptocurrencies but their population will shift en masse to cryptocurrencies in order to avoid corruption, human error, theft, etc. First on my list for this is Argentina.What will the value of cryptocurrencies be?When I first wrote about this, all cryptocurrencies added up was about $200 BILLION. Now it’s around $750 Billion. Although I do view many of the currencies as scams so the number is really less.That’s the “SUPPLY” of cryptocurrencies.The DEMAND is the amount of paper money + gold that exists.That number is $200 TRILLION.So in order to go from ONE TRILLION to 200 TRILLION that’s a 200x gain. In other words, $10,000 turns into $2,000,000.And if you focus on the legitimate currencies, the gains are much greater.So, again, we are very much in the beginning of this. There is no other investment opportunity in our lifetime greater than this. And we ARE at the beginning.What are the legitimate cryptocurrencies?There are many. I don’t want to get into the weeds here and discuss all the technology.And I also don’t like all the speculative trading that is going on in cryptocurrencies. Speculation leads to scams and bubbles.But just like there were Internet companies that survived the bust and became the companies we use every day, there are cryptocurrencies that exist now that we will use every day ten years from now.You said on CNBC that Bitcoin will go to a $1,000,000? Were you kidding?No.Bitcoin hit $20,000 recently. We just said it could go at least as much as 200x higher. That’s $4,000,000. So even at $1,000,000, Bitcoin will be a buy.How else can one make money in the Bitcoin sector?You don’t have to be a software developer.When the gold rush hit in the 1800s, Levis Jeans became the big winner. And the companies that sold “picks” and “shovels”.There will be many picks and shovels companies in the Bitcoin space.Sites that have the latest bitcoin news and analysis will do well. Exchanges will do well. Companies that help integrate traditional companies with the deeper parts of Bitcoin technology will do well (like whoever is helping UPS integrate blockchain tech into their logistics).Companies that help new cryptocurrencies launch will do well.And on and on.Someone said you called “Bitcoin is a Ponzi scheme” in early 2013. Why should we trust you now?First, I’m always a believer that the best investment is in yourself. This will provide greater than 200x returns.That said, I was wrong in early 2013.I’ve been a software guy for 25+ years. I’m able to do my research. Which I did.By May 2013 I had already done enough research to build my own bitcoin store, go on CNBC and discuss Bitcoin, and be an advocate when it was just $60. This is all public info.But, for me, focusing on my physical health, emotional health, creative health, and spiritual health, will always be the most valuable “Currency” I can develop and trade in.Could Bitcoin be just a fad?No.Paper money DOES have the problems described above. Someone has to solve those problems. Bitcoin and other cryptocurrencies solve them.And every industry evolves. Cryptocurrencies are the “In Data We Trust” way in which money is evolving.And $750 BILLION believes in me on this.Who is Satoshi?Satoshi is the secretive founder of Bitcoin. He is worth many many billions in Bitcoin right now. He is anonymous and reporters, governments, etc have never figured out who he is.That said, a number of people know who he is. I read his blog every day, He is a secretive person and nobody wants to blow his cover.Well, what should I do now?Don’t listen to me.a. Get an account on Coinbase (or wherever). Buy $10 worth of Bitcoin just to taste and feel it.b. Then read. Read a lot.Here’s some books not about Bitcoin that are worth reading:Sapiens by Yuval HurariThe Evolution of Everything by Matt RidleyThe Ascent of Money by Niall Ferguson.Antifragile by Naseem TalebThere’s a lot of discussion of cryptocurrencies on Reddit and Twitter. DO NOT read those. Most of those discussions are filled with trolls although there are some decent sources there.Blogs / Sites: start with Coindesk and CoinTelegraph. You'll find the rest as you read more.
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What's an explanation of dark matter in details, with very high accuracy?
To fulfill your stated requirements would require (1) a post the length of a book, and (2) a deeper understanding than I personally have. However, given that Quora is not the right place to write a book anyway, I may know enough to take a reasonable crack at this. With that said, though, if you're an actual expert on one of these areas and catch something I've explained incorrectly, please let me know in the comments so that I can fix it!Yes, it's still quite long, but keep in mind that this is the short version.What is Dark Matter (DM)?Dark Matter is just matter that doesn't interact via the Electromagnetic (EM) or Strong Nuclear forces. No EM interactions means that it can't give off light, or absorb light, or reflect, refract, or scatter light in any way. This, naturally, makes it rather difficult to see (thus "dark" matter, although I suppose it's more "transparent" than "dark"). Our current best measurements indicate that something like 85% of the matter in our observable Universe (about a quarter of the total mass-energy content) is Dark Matter.Isn't Dark Matter weird/spooky?Not at all. Neutrinos, for example, satisfy the definition of Dark Matter, they just represent such a tiny fraction of the total DM in the Universe that people tend to neglect them when they ask, "what is Dark Matter made of?"There is nothing at all strange or unusual about certain particles not interacting in certain ways. Neutrons have no electric charge (although they do have EM properties, but that's neither here nor there), and electrons don't interact via the Strong Force, so why shouldn't there be particles that interact with neither, like the neutrinos? Saying that interacting with light is "normal" is purely human bias, because we rely so much on sight. Having lots of DM in the Universe is in no way "weird"; it just means that the Universe doesn't revolve around what humanity finds convenient!Why are we confident that DM exists?This is by no means a complete list, but it should give a sense of the kinds of evidence we have. Each of these would take at least a chapter of a book to explain properly, but hopefully this will give the general idea.Galactic rotation curves.When one object orbits another, the orbiting object has to be constantly accelerating towards the central object (or, more precisely, they both accelerate towards their combined center of mass). Without that acceleration, the orbiting body would just fly off. The faster the orbiting body is moving, the more acceleration is needed to keep it in its orbit. Since in this case the acceleration is due to gravity, this means that the central mass has to be bigger. For a circular orbit of a small object [math]m[/math] at distance [math]r[/math] and velocity [math]v[/math] around a large (and assumed stationary) object [math]M[/math], the acceleration requirement gives[math]\frac{v^2}{r} = \frac{GM}{r^2}[/math]which in turn gives us the relation[math]v = \sqrt{\frac{GM}{r}}[/math].(I'm doing this with Newtonian gravity for simplicity; to do it with full rigor would require General Relativity. In this situation, the Newtonian approximation is actually generally pretty good.)For a more complicated object than just two point particles, as long as there's enough symmetry, the gravitational version of Gauss's law says that the relevant [math]M[/math] is the total mass of everything in the galaxy that's at a distance less than [math]r[/math] from the center. [Edited to note: For this to be exactly right, the matter distribution would have to be spherically symmetric, which galaxies aren't. As a result, actual calculations are a bit more complicated than shown here.]This allows us to "weigh" different parts of the galaxy, by measuring the relationship between [math]r[/math] and [math]v[/math]. (We can measure the rotational velocities by comparing redshifts on the approaching and receding sides of the galaxy.) This image from Wiki shows the result of this measurement:The "expected from visible disk" line is determined by adding up the masses of all the parts of the galaxy that we can see. (How we measure that mass is a whole different discussion.)Gravitational Lensing.In General Relativity, whenever light passes through a gravitational field, that field bends its path slightly. This acts like a Gravitational lens, and can produce, for example, "Einstein Rings", like this image from Wiki:The "ring" is a distorted image of a single blue galaxy located behind the red galaxy at the center. Light from the blue galaxy goes out in all directions, but is bent by the red galaxy's gravity. This means that the light that starting out on a "direct path" to us never signNowes us, but light that was originally missing us by a specific amount (in any direction) gets bent back towards us, which makes it look like it's coming from a bunch of different directions, resulting in the ring image seen here.This is a highly dramatic example of gravitational lensing, but there are much more subtle effects that can still be useful. In Weak gravitational lensing, statistical analysis of distortions in the light we receive allows us to "map out" the gravitational field between us and distant galaxies. Often, this just shows more mass than we know how to account for, but that could be explained away by just assuming that our understanding of gravity is off. There's something else, however, that's a lot harder to explain away in that manner: the Bullet Cluster.(Image from A Matter of Fact on nasa.gov)What's going on here? Well, two galaxy clusters collided with each other, and this is the aftermath. The red coloring represents where the visible matter is, while the blue coloring represents where the dark matter is, as inferred by gravitational lensing. Why are they separated so much? Well, most of the luminous matter in a galaxy cluster is in the Intracluster medium, a hot, dense, plasma. When these plasmas collide with each other, a signNow amount of the matter slows down. However, since Dark Matter interacts only very weakly, the DM components of the two clusters were free to pass through each other unimpeded, resulting in a separation (as seen here). Not only is there "not enough" luminous matter... it's in the wrong place! A small number of scientists remain committed to finding ways to explain this without DM, and they have had partial success, but only by including as-of-yet-unmeasured things that are far stranger than DM (for example, a rank-3 tensor field, which, while possible, would be the first tensor field of such a high rank ever found).Effect on the Cosmic Microwave Background.For the first few hundred thousand years after the Big Bang, The Universe was hot enough that it was highly ionized, which made it more or less opaque to light; photons were pinballing around just like any other particle. However, once things cooled down enough, signNow amounts of the protons and electrons combined into neutral Hydrogen, which is (more or less) transparent to most of the light that was around at the time. This happened fairly quickly (in terms of cosmological time), and so it was as if all of the light pinballing around all over the Universe were suddenly released all at once, effectively capturing a snapshot of the Universe at that moment in its evolution. Since this light was released everywhere in the Universe, we can point our radio telescopes in any direction we like, and there it is: the Cosmic microwave background (CMB). It's almost the same temperature in every direction, but there are small differences (generally around one part in [math]10^5[/math]), and we have measured these tiny variations with extraordinary accuracy: first via the COBE satellite, which was then replaced by the more advanced WMAP, which was then replaced by the more advanced Planck (spacecraft), which is currently in operation.These tiny variations can tell us a lot about the early universe. For example, statistical analyses of these variations show the distinct signature of pressure waves propagating through that early plasma, and the nature of these Baryon acoustic oscillations can tell us a lot about what kinds of things were around. Specifically, the protons and electrons would be dragged along by the (dominant) photons, becoming part of the wave, but Dark Matter wouldn't, and would only be indirectly affected by the resulting small changes in gravity. The presence and abundance of Dark Matter therefore affects how these waves impact the temperature variations in the CMB.The formation of large-scale structure.The standard story given in popular science explanations goes like this: the Universe started out hot and dense and more or less uniform, then it expanded and cooled and clumped into stars and galaxies. However, this story is incomplete, in a way that means that galaxies wouldn't exist without dark matter.At a surface level, the story makes sense; heck, I got almost half-way through a Ph.D. in Physics without noticing any problem with it! It sounds so plausible because of how gravity works: if matter is distributed more or less evenly, but some places are a tiny bit more dense than others, gravity will tend to make those overdensities bigger and bigger. Why? Well, even if a region is just a little denser than its neighbors, it's still going to win the gravitational tug-of-war and gradually accumulate more and more mass. Of course, once it has more mass, it wins the tug-of-war by even more, and so it's a run-away process that ends in big gravitationally-bound clumps.So, what's the problem? Well, consider the air in the room with you right now. Are there tiny density variations? Of course, since perfect uniformity is impossible. But, is it forming into exponentially denser clumps? Certainly not! The reason for this is that, under these kinds of conditions, when the density of a gas goes up, so does its pressure. That pressure makes the over-dense region expand outwards again, returning the density back to average!Now, of course, the scales and temperatures involved are totally different. A huge region of gas will have more gravitational attraction than a tiny pocket of denser air in your room, and gas in space has no need to be at room temperature, either. So, if the gas can cool down enough, that can reduce the pressure enough for gravity to win. But, the more it compresses, the more it heats up, because it's converting gravitational energy into thermal energy, and so the pressure goes up again. This means that forming a galaxy is a very gradual process, during which it has to constantly be getting rid of tremendous amounts of energy. If it were just a cloud of gas, without any outside interference, this process wouldn't be nearly fast enough, and we wouldn't have galaxies today.But, as you know, hot things give off heat much faster than cold things. So, if we want galaxies to form by the present day (or, indeed, before the expansion of space makes matter too dilute to form galaxies at all), something has to be forcing the gas to compress and become denser and hotter than it would be able to under its own gravity. Enter: Dark Matter. Because it interacts only weakly, Dark Matter doesn't have pressure like gas does. So, the argument about the run-away gravitational process actually works for Dark Matter. DM can't get rid of energy very easily, and so conservation of energy and angular momentum mean that it can only collapse to about 200 times the background density, but the resulting Dark matter halo provides enough of a gravity well to "seed" the formation of visible galaxies. So, it's not a coincidence that the galactic rotational curves showed large amounts of dark matter... the galaxies wouldn't have formed there without it!As a result of this DM "seeding" process, theoretical models and computer simulations of the formation of DM structures have been fairly successful in describing the statistical properties of how galaxies are distributed now, as well as how they were distributed earlier in the history of the Universe (which we can measure by looking at very distant galaxies).Okay, so that's why we think Dark Matter exists. But, the next obvious question is... well... what is it? What's it actually made of? What are its properties? Here, we have only very partial knowledge, and multiple different theories, any combination of which could be correct (or, perhaps, none of them). This leads us to:What do we know about the properties of Dark Matter?Again, this is in no way exhaustive, but it should give you a decent idea.It's "cold".This is why the current dominant model of cosmology is called the Lambda-CDM model: "Lambda" ([math]\Lambda[/math]) stands for the Cosmological constant, and "CDM" stands for "Cold Dark Matter".When an astrophysicist describes something as "cold", they generally mean that the associated thermal velocity is much less than the speed of light. By this standard, the air in Death Valley is "cold". But, then again, to cosmologists, galaxies are basically point-particles, so everything's a matter of scale and perspective!So, why does DM need to be "cold"? Well, remember that DM clumping together was integral to the formation of structures like galaxies. However, if DM were very hot (and therefore the particles were moving very fast), this would prevent it from clumping properly. I have explained it in very vague terms, but the effects are actually well-understood mathematically. In fact, it's similar to something that does happen, with photons: Diffusion damping (or "Silk damping"). However, in the case of Dark Matter, the result would be a signNow delay (or even outright prevention) of the formation of galaxies, to the extent that "warm" Dark Matter can be observationally ruled out.Incidentally, this is how we know that it's not all just neutrinos: given what we know about the early Universe, they would be far too hot!It interacts only very weakly.This is somewhat part of the definition of Dark Matter, but it's good to see observational confirmation. I know fewer of the details on this, but I do know that there are observational bounds in the "interaction cross-section" of Dark Matter, both in terms of its interactions with luminous matter and for its theorized self-annihilation processes (in which two DM particles could interact and annihilate each other). Also, as discussed before, the Bullet Cluster shows giant dark matter halos more or less just passing through each other, which suggests very weak interactions.So... given those properties,What might Dark Matter be made of?There are two leading theories (as far as I'm aware) that suggest the existence of specific types of new particles. Both are well-motivated theoretically (as in, we have good reasons for suspecting that particles with those particular properties might exist), but neither has been experimentally confirmed yet. Interestingly, the two predicted particles are totally different from one another, not slight variations on the same theme.At the end of the day, either of these theories could be right, or both (given the existence of neutrinos, there's no need for all the rest of the DM to be a single type of particle), or, of course, neither.So, what are the theories?Axions.I feel morally obliged to put this one first, even though the other one is more popular at the moment, because my university is heavily involved in the Axion Dark Matter Experiment (ADMX), and so of course I'm rooting for my colleagues!The existence of Axions has been theorized since the 1970s, but we only recently have the technology to even properly start to try to measure them in the lab. Axions are extremely tiny particles (unlike WIMPs, the other leading option), and so they would have to exist in truly huge quantities. Still, because they interact so weakly, it's hard to detect them, even with billions of them passing through your detector in a tiny fraction of a second. The linked wiki articles do a better job of explaining the theoretical motivation and experimental search than I could. It's really quite elegant, and would solve a lot of outstanding mysteries in particle physics (like the Strong CP Problem), but I can't do it justice.Weakly Interacting Massive Particles (WIMPs)(Wiki reference: Weakly interacting massive particles)To explain why WIMPs are theoretically attractive, I have to take a little detour into "relic abundance", i.e., how many particles of a given type were left over after the Universe cooled down and generally became a more stable place.In the early universe, everything was very dense, and many different kinds of particles were "tightly coupled" (i.e., they interacted with each other frequently). However, as the universe got larger and cooler, these interaction rates slowed down, more or less to a stop, a phenomenon known as "freezing out". The time at which something "freezes out" depends on a number of things, including its mass and how strongly it interacts with other things. This "freezing out" has a huge effect on the abundances of various particles in the Universe. For example, consider the process[math]n \Leftrightarrow p + e^- + \overline{\nu_e}[/math],in which a neutron can turn into a proton, electron, and electron anti-neutrino (or vice versa). If you go back far enough, this reaction will be in thermodynamic equilibrium, just like with any chemical reaction that can go either direction. However, once the neutrinos "freeze out", equilibrium can't be maintained anymore (although other processes, like beta decay, can still happen). The relative abundance of protons and neutrons at the moment of freeze-out is determined by two factors: the mass difference [math]\Delta m[/math] between the two particles, and the temperature of the Universe when freeze-out occurred. These factors combine to determine by how much the lighter particle is thermodynamically favored, with an exponential dependence:[math] \frac{N_n}{N_p} \propto e^{-\Delta m c^2 / k T}[/math]where [math]k[/math] is Boltzmann's constant.This clearly impacts the "relic abundance" of the particles involved (here, protons and neutrons). So, in general, the abundance of a given particle in the Universe today is signNowly influenced by the mass of that particle and how strongly it interacts (since that affects freeze-out time and thus freeze-out temperature). This brings us to the so-called "WIMP miracle": a particle that interacts predominantly via the Weak Nuclear Force, and that has a mass near the mass scale associated with Weak interactions ([math]\sim 100 \text{ GeV}/c^2[/math]), would have a relic abundance that would match the measured abundance of Dark Matter in the Universe. Given that such a particle was already speculated to exist (in the context of Supersymmetry), this was very theoretically attractive to a lot of people, although our inability to find it so far has damped some of their spirits.So, there you have it: my summary of Dark Matter. Hope it was worth the time it took to read! (Let alone write...)
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