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FAQs
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How did Brian Roemmele become a payments expert?
Warning: I Am Not An Expert In Anything. I Am And Always Will Be A Student.My Payments Experience Is Completely And Utterly An Accident. I know not how to say this in a few words but it may be an interesting journey to share with you.A Nerd, A Geek And The Dreams Of Being A ScientistIt was all an accident while I was on my way to becoming a scientist. That dream got delayed. I was studying Quantum Physics and on the other end Astro Physics. This started as a university level course while a sophomore in High School. At the same time I was rather excited by electronics that start...
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Computer Science: How do digital signatures work?
Note:The terms ‘electronic signature’ and ‘digital signature’ are often used interchangeably. However, the primary differences between ‘electronic signature’ and ‘digital signature’ are linked with signature laws and regulatory requirements.How do digital signatures work?The signature software leverages a public key algorithm to generate two keys that are mathematically linked: one private and one public. In order to create a digital signature, the software then creates a one-way hash of the electronic data to be signed.When a user signs a document online, he/she leverages the private key to create a signature. On a general basis, the private key remains under the sole control of the owner. This private key is used to encrypt the hash.The encrypted hash, along with other information, such as the hashing algorithm, together forms a digital signature.How digital signatures help validate integrityThe value of the hash is unique to the hashed data. Any change in the data, even by a single character, will result in a different value. This attribute enables users to validate the integrity of the data by leveraging the signer's public key to decrypt the hash.If the decrypted hash matches a second computed hash of the same data, it proves that the data hasn't changed since it was signed.If the two hashes don't match, then it is a clear indication of the fact that either:(i) the data has either been tampered with in some way (integrity) or(ii) the signature was created with a private key that doesn't correspond to the public key presented by the signer (authentication).
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How was Balaji Viswanathan's overall experience attending the Global Entrepreneurship Summit 2017 held in Hyderabad, Where his I
Honestly, it was overwhelming. Things went truly viral and we were completely unprepared. We were so unprepared that we left the arena while there were important dignitaries trying to talk to us. Thanks to all of you for making this magical and thanks for your wonderful compliments.I was just a few feet from Mr.Modi as we entered the place and it was an amazing feeling. Someday I will get to talk with him. And Ivanka was probably the most beautiful woman I have met. We just joke that even our robot went giddy infront of these amazing personalities. Top entrepreneurs like Ritesh Aggarwal [founder of Oyo] walked up to us to congratulate and it was a magical feeling.The highlight of the whole thing was Amul making its signature billboard with our robot. I feel humbled by these billboards.We were truly excited by Shri Modi’s and Ms. Ivanka’s expression and the thousands of snaps that were taken along with hundreds of media coverage we got. The PM tweeted about it and his office featured the bot in their homepage.Yesterday in Finland at the Slush event a founder of a European company building robots walked up to me after recognizing the Mitra and talked about partnership in taking our robots to the European market. That felt elating [inspite of the fact that the product was not in the perfect shape especially after disassembling for the flight]. Many Finnish people took selfies with the robot to put it on their timeline and that was great.We also had a delegation from Japan’s Olympics committee visit our office to explore robots for the upcoming Tokyo Olympics. These sales might or might not happen in reality, but it felt amazing to imagine that Europe and Japan could buy products from India not for cost, but for uniqueness.To our well wishers:I’m humbled by your comments and it comes as a great boost for my team that has been tired and dazzled from months of hard work. Everyone in my team come from humble backgrounds and are out to prove something big and this comes as a shot in their arm.They worked day in and night to get the models going. We faced a number of setbacks. A model made in China never came home as it is stuck in Chennai customs for 2 months. A clay model we made had several inaccuracies and could never be completed. An android device we planned didn’t support our code base and we had to go for a quick fix with another tablet. Logistics went crazy and so did a million things.There were many hands that went in. Our CTO Bharath built the overall mechanics and everything to get it moving. He was helped by our production engineer Ram and Salman who helped in the structure. Our BDM Kaundinya pulled off this event and got our robot in after our COO Mahalakshmi was invited as a delegate for the event. Mahalakshmi and her brother Sudarshan did the whole supply chain and logistics for getting all the components. Her father helped us secure funding resources to sustain the R&D.Our electronics engineers Murali, Raushan and our new hire Spandana helped in building the circuit boards and making the electronics work. Our software engineers Ashwin, Anand and Sreejit made the entire stack. Our project manager Amit made sure the things went on schedule. and Our clay modeller Mr. Angappan helped us prepare the final fibreglass body. Our designers Vinay Rao and others at Bang Design helped us design the body. And journalists like Ranjani Ayyar and Nilesh Christopher spent time understanding the product to build an accurate story.And a special thanks to Kishlay Raj and his team at Sumeru. Their CEO and CTO gave their team’s personal time to finetune the underlying product. While we couldn’t showcase Hindi language NLP in the limited time it is a part of the product that we would sell.It took the whole village to put up this show.To the general public:Just to clarify, it was not any approval from the Indian government for being best startup or anything. And it didn’t involve me using any connections or favours. The event organisers were looking at something unique for the event. They were set on a large, humanoid robot to move around and greet the dignitaries and ours was the only one in the market - not just Indian - that could do so. We have done many events across India with our robots and we had worked with the event organisers before.A few days before the event, our robot was even cancelled for the event due to security reasons etc. Then we got back in the game once the senior leadership Wizcraft [the organisers] realised this was Made in India and they wanted to encourage such a product. And being a poor bootstrapped startup, they recognized the need to encourage entrepreneurship of all kinds. We got to this place without any angel/VC money.We have had many successes so far this year. Nasscom put us in a number of top events - including letting us pitch to the Japanese delegation at the Ministry of IT earlier this month. We were among the top 50 startups chosen by them and were in almost every top Nasscom event this year. We were also invited as a part of the Indian delegation to China and close to closing a big order there.We have also worked with Thub and had the honour of presenting a PoC to the global leadership of Novartis who came to Hyderabad earlier this year.To our critics:A few people on the Internet trolled us saying this looks like 70s toys, 90s toys, children’s project etc. I’m used to getting trolled and don’t mind criticism on me. But, since you guys were abusing the work of a group, I’m forced to respond in kind.I just ask them if it were that easy to make our product, why was there never a robot in a major Indian event so far? Why didn’t they make it and take all the honours? Why are you reading about an Indian robot doing such a thing for the first time? And why are there no global product companies from India, if making hardware is a child’s game? Think about it.People who never make things are usually the ones who underestimate the complexity that goes into a product. If you have never made things, you won’t know the pain of making.People said I pulled my connections. The event organizers don’t know anything about me and neither does anyone at BJP’s top brass or the US government that sponsored the event. Our event participation was pulled off by our excellent BDM and I had little to do with it. The event organizers would draw a blank if you ask them who Balaji is.Some people said I should learn from Elon Musk and Steve Jobs in how not to make shitty product. With due respect, I studied business history more than most of my critics. Jobs and Musk are geniuses. But even the geniuses start with more achievable targets. Elon Musk started with a product like this: Yellow Pages. Steve Jobs started with a product like this: Apple I. Honda’s Asimo started this way: Honda E1. Benz started this way: karl benz. Our own amazing ISRO guys started like this: The Story of How ISRO Defied All Odds To Put SatellitesGreat looking products don’t sprout in thin air. They are a result of years of work, starting with more modest looking creations. You cannot become an adult without starting as a fetus.We are trying to prove that there is a mass market for humanoids. It would be suicidal for a company of our stage to worry about a perfect product. Ours is more like a fetus and we are trying to keep it nourished and nurtured for a grand future.A few more critics said we should have been embarrassed to put such a product. Predictably none of those are entrepreneurs or someone who have created something. Because, real creators and entrepreneurs don’t worry about breaking things. Taking risk is what we do. Rather than an embarrassment, I would feel elated for my team even if it had not even started moving.The challenges:Try moving a 50kg, 5 feet tall object through varying terrain in a noiseless, smooth way without tripping and you will understand the physics behind the design. And with a battery life to last hours of rehearsals. It is a non-trivial piece of engineering with suspension systems that my team created. From the fiberglass body to the internal structure, everything was made here.We built the hardware, software and electronics for this. We built 9 prototypes this year. We are bootstrapped and have done all this hardware investment without any external funding. And while we didn’t show its real capabilities in the GES event [too risky to try] our robots can move autonomously and that what the funky head antenna is for. We integrated NLP tools and face recognition APIs and those are non-trivial things. And over the years we iterated a million times to get things better and better.Of course, there are plenty of inaccuracies and faults. This was handmade and in a very short span of time. But, the team has gone through enormous things to get this far, from where we started earlier this year.Developing product in India is hard. Making everything in India is hard. Making such a large object is hard as the mould costs multiply and the complexity goes as a square of that. Talk is easy, getting the stuff work on the floor is hard and why these don’t happen often.I’m not saying that our product is perfect. I’m saying the product is perfected and we will get there someday. If we keep worrying about breaking things, we are not a startup.In conclusion:I’m not saying we are India’s best product or even India’s best robotics company. The GES event was not about that. They wanted to showcase entrepreneurship at an early stage and a product that fit their needs. Large finished products come from large companies, startups backed by billionaires or at least startups with large venture funding. GES thought having a product from a company that didn’t fit any of these categories above and supported by no one was worth doing.Hardware in India will sprout only when difficulties of building hardware is understood and its complexities appreciated. Everyone says they or their grandmother or their child could have our product. But, they didn’t. Only our team did. And it is much easy imagining doing a product than doing it.Is the product overhyped? Maybe. Was there luck involved. Yes. But hey for a bootstrapped startup that has been teetering on brink of bankruptcy and has had more than its share of misfortune this year, I would not mind a little luck. Would you? Peace!
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What is the new instantaneous payment system being used at Target?
This is a great question! I have some direct and indirect knowledge of this program. The way Target has crafted the retail transaction experience I think portends to the direction I believe a vast majority of retail experiences will migrate to. I will digress with a bit of background.Target And TechnologyTarget has always been on the leading edge of technology on front end systems and back end systems. Most of the technology is not seen and operating in the background. For example, the POS and Inventory management software is so well tuned, that it does an incredible job in predicting demand for a particular item up to the not only the day, hour or minute, but to the second.They also have a great deal of foresight in branding most customer facing technology in the store's iconic color of Red. And look to the finest detail on how to improve the entire check out experience. Not just optimized for speed (see Walmart) but optimized for the best possible experience. This is one of the largest forces driving the company's adoption of technology and perhaps the high wisdom that is seen in the way they deploy this technology. There is a great deal of study in retail psychology that most of us are not aware of that plays out when you are completing a purchase. You and I want to get through the checkout line in a very efficient manner. We want the experience to be fast, but perhaps not too fast. The 10 feet that surrounds a checkout line has some of the highest profitability for most retailers and we as consumers love this little area. So Target thought very long and hard about the entire process and signNowed out to a number of industry experts over the last 15 years to help craft the best possible experience we see today.Electronic Signatures. Swipe And Sign Before The Final Barcode ScanTarget was one of the first national retailers to embrace electronic signature pads instead of signing a paper receipt. They did this not so much for how it allowed the company to not need to manage and store the customer's signed receipts, that was important, but more so on how much faster the check out process was conducted. The new technology allowed for a new concept in retail, the early presentation and authorization of the transaction, prior to the final barcode scan. It allows the customer to swipe their Payment Card and sign the receipt all before the last product was bagged. Target was one of the first retailers to implement this very new experience. It sure seems simple and logical today, but it was anything but that when the ideas were being hashed out.Over the years. Target has experimented with a number of customer facing systems from IBM, Verifone and Hypercom. The most recent standardization is with a customized version of the Hypercom Optimum L4150 High-Performance Multi-Lane Payment and Advertising Terminal.Hypercom L4150How Does Target Speed Up Payment Card Acceptance?There are many parts that go into creating the very speedy Payment Card experience at most Target stores. As mentioned above the customized L4150 is the point of interaction and allowed for much of the changes we see in the checkout experience. But there is a lot going on in the background. The L4150 is connected to the POS system usually and IBM SurePOS 500 or 700 and routed through custom software that is connected to the Payment Card Authorization systems. All of this tech has been optimized by and for Target. The process starts when the customer swipes the Payment card and this can be the moment the first item is scanned by the cashier. Once the card is swiped there is an immediate request for a signature. When the last item is scanned the system completes the transaction and prints the last lines of the receipt and this can be as fast as 2 seconds. If one waits to the end of the last scan to swipe the credit card and the transaction is below $50 there will be no prompt for a signature and this is equally as fast. A Pleasant Surprise The entire process is designed to be highly efficient and very simple for the consumer to translate. It comes as a pleasant surprise to just about all of us, even when when have experienced the process before. It is in stark contrast to most Payment Card transaction experiences. This well thought out process is combined with one of the fastest Payment Card Authorization network connections, at a major retailer, using M-Dex ((Merchant Direct Exchange) established by Visa to process at 1mb+ speeds for very large retailers (500,000+ transaction/month). The entire backend is driven by a 5mb-25mb connection to the Target's VPN (Virtual Private Network) using Microsoft's Virtualization solution— Hyper-V. The system is run on Dell R710 servers for the hosts running Hyper-V and Dell MD1000 storage units. There are 15,000 virtual guests running on more than 3,600 Hyper-V hosts across the entire store network. This supports updates to more than 300,000 endpoints across the network, including servers, virtual machines, mobile devices, PCs, and POS registers. Target, with about 1,768 stores, usually has no IT personnel on-site and has found the Hyper-V virtualization allows a vast majority of issues to be solved at the data center and not locally. Microsoft has a great case study of some aspects of Target’s backend technology with the use of the Hyper-V product here: Microsoft Case Study: Microsoft Services - Target Corporation.This system shows a rather huge commitment to technology and a desire to create the most optimal consumer experience. To see how the same set of circumstances is translated with other national retailers, visit Walmart or Kmart and judge the experience. In Walmart's case, they have a profound, "If it was not invented here, it is not relevant" attitude with its study of the retail experience, and one can surmise if this translates to a richer experience for its customers. By contrast, Target is more than willing to continue to test and experiment and to signNow outside of the company for experts that have studied these processes. I personally think Target is the best example one can find in balancing all important aspects and crafts into one of the top 5 best retail experiences and I feel strongly that wise retailers can gain great insights by studying Target and the way they see its customers.
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Laws in Singapore: is email a legal document?
The answer to your question “is an email a legal document”, is yes, if the essential elements of a legally binding contract are present, and these are:offer and acceptanceconsiderationthe intention to create legal relationsclear and certain terms.Under Singapore law (see the the Electronic Transactions Act), an electronic record or signature satisfies any rule of law requiring “writing” or a “signature”, and emails can constitute such electronic record or signature. The Singapore High Court (SM Integrated Transware Pte Ltd v Schenker Singapore (Pte) Ltd) has confirmed this, so there’s no doubt that emails can constitute legal documents, in the right circumstances.However, in your case, the Company may not be bound by the CTO’s statements if the agreement you are asked to sign, contains an “entire agreement” or “no reliance” clause, so check for this.This clause is commonly found in contracts, and provide that the contract forms the whole agreement between the parties signing it, and that the parties cannot rely on any previous agreements, negotiations, discussions or statements that are not found in the agreement.So, check that there isn’t an IP assignment clause that has that effect, and see that the entire agreement clause does not apply to the CTO’s statement. If the company really wants you on board, they may agree to the exception.Hope this helps, and best of luck with your gig.
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What are the most popular sales and marketing tools used by hot SaaS companies?
Well, I cannot speak for other SaaS companies, but we are in the space and we consider ourselves to be fairly hot so I’ll just tell you about some stuff we use.SalesflareYes, we use our own product. Salesflare is a sales CRM aimed at automating most of the sales flow. It automatically fills out our address book with data it pulls from sources like social media, company databases and email signatures. It keeps track of interactions of leads towards us (phone, email, calendar), including email and website tracking. All of that is automated in a nice timeline so we have all the information we need at our fingertips at all times. From the data it collects it will tell and remind you what to do about specific leads. It’s not a robot yet, but it does do most of the working and thinking for us.There’s a desktop and a mobile app, but I mostly use it straight from my Gmail, where it gives me everything I need on a customer from an integrated sidebar.You can grab a free trial from the website http://salesflare.comLinkedIn Sales NavigatorAt $79,99 a month (a little less when you take if for a year) it’s not exactly the cheapest tool from this list, however it’s a great source of lead generation for us. Sales Navigator features a wide arrange of useful filters that allow you to effectively search for potential clients. It offers analytics, insights and recommendations so you can stay updated and focus on the right people.We automate this lead generation process with Dux-Soup, which is a Chrome-plugin that acts as robot you can issue to visit LinkedIn profiles and collect its data. Just set your filters to target your ideal customers and tell Dux-Soup to go visit the whole list. Not only will you have all kinds of useful data on them, it will also you on their profiles that you visited them, which counts for visibility already. You can export this data in .CSV lists and then go nuts on these, for which we also use some tools (see below).Hunter.ioPreviously EmailHunter, this is a great tool to help you find email addresses. We give first and last names plus their company domains of leads we scraped from LinkedIn with Dux-Soup to Hunter and it gives us their email addresses back. It won’t find everything, return rate is about 70% but that’s a long way already.Rapportive One of my other favourite Chrome plugins. Rapportive acts as a sidebar in your Gmail and shows you LinkedIn profiles associated with the email address you have an email open from or are typing one to. It’s a great way to find out email addresses Hunter wasn’t able to give you. Just start typing some reasonable guesses in a draft email and whenever a LinekdIn profile pops up in Rapportive, you’ll know it’s the right one.I don’t currently use Rapportive anymore as Salesflare does the same, but if you don’t need a full-fledged CRM, this is solid, free alternative.Kimono LabsYou can use Dux-Soup for LinkedIn, but the web has more useful data to offer beyond LinkedIn. Kimono is the best data scraper out there, in our experience. Or was. Since it was bought by Palantir last year, the service has been discontinued. It used to work via a Chrome plugin connected to their server, but that server is not among us anymore and the plugin has been removed from the Play Store.There’s a workaround though. You can install the Kimono desktop app, which will act as a server. The Chrome plugin you can download here. On the house ;).If you’re looking for an alternative, you can check out Import.io, which is not as good though.MailChimpWe use MailChimp for email campaigns. Obvious choice, it allows for effective email campaigns that won’t end up in your recipient’s spam box. Other than that: powerful analytics, email tracking, great resources on email templates and easy to integrate with our other tools.MixMaxMixMax is the tool to turbocharge your Gmail. We use it alongside MailChimp because it sends emails from your Gmail and not from the MailChimp server. This makes it better for personal emails, as they won’t end up in the ‘Promotions’ tab of your recipient’s Gmail account. It also gives you more power in setting up email sequences; it allows you for example to break off a sequence when a recipient has responded to your first email. Other than that, it’s filled with cool features to spice up emails: slash commands, email templates, email and click tracking, embedded surveys/polls and an awesome meeting scheduler.AhrefsYou can use Ahrefs for organic traffic research. It will show you the backlinks (including URL and domain rating, as well as data of the link and other stuff) of every website out there, which makes it great to dig into the SEO strategy of your competitors. It also features a keyword explorer, which can be a great in helping you to determine the keywords you should be targeting. When you’ve identified your keywords, Ahrefs’ rank tracking tool can give you day-to-day updates on your ranking for your keywords.Another great tool for SEO is definitely Moz.com. It also features a keyword explorer, keyword rank tracker, web explorer to find link building opportunities and several tools to improve the SEO of your website.Google AnalyticsNo-brainer. Everyone uses it.Hemingway App Hemingway App will analyse a piece of text and grade it on readability. It does so by taking into account stuff like complex sentences, use of adverbs, use of passive voice and common spelling errors. Very useful to make sure your text is easy on the eye and suited for publication.ZapierLast but for sure not least. Pretty much the holy grail of sales, marketing and project management tools because it can make them all work together. You can pretty much pick out your favourite tool for every job and then tell Zapier to streamline them into an effective suite that is perfect for your business. Workflow automation done right.
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What is it like to have ADD or ADHD?
Wow. So many awesome answers. I share much of what has already been described:* Brighter than almost everyone around me* Learn new things incredibly fast when engaged* See deeply into problems--develop an abstract understanding of a new area so much faster than others* Very, very good at anticipating problems and making a plan. Very, very bad at executing against it.* Terribly easily distracted, always starting and abandoning projects* Information junky LOVE to learn new things* Incredibly verbal and charming when I want to be. Witty and funny.* Viciously self-critical and sometimes viciously critical of others* Hate to wait, always late, procrastinate.* Finish people's sentences for them* Only care about getting the information I need. Please don't tell me why that task isn't done. I don't care. I asked a yes or no question: Is it done? * Being mistaken for a dick because my irritation over delay and distraction is mistaken for judgment about another's behavior or their output.* C student in high school, didn't graduate college. Sometimes spent more time helping others with their homework than doing my own.* Hated to attend lecture. The information came too slowly. Detested listening to others ask questions of the teacher. Why are they so stupid? This is a waste of my time. Learned on my own time in my own way.* Undisciplined about health. Don't take care of my health for years at a time. Then flip-flop to hyperfocused. Eat carefully, exercise every day, drop 40 pounds or more, then peter out and back to sloth.* No self-control around foods. Can't eat one cookie. The only way I can eat better is to not have the cookies around.* Tried drugs as a teenager but didn't like them. I literally didn't get what others thought was exciting about being drunk or stoned. Would 100X rather waste time reading a fascinating history book or playing a strategy game than feel impaired.* TV calms me if it is engaging. Enrages me when it isn't. Commercials usually make me want to tear my eyes out. Poorly written comedy makes me want to kill somebody. I can more-or-less only watch PBS and cable TV because the programs are commercial free. Documentaries are the BOMB. Who knew earth worms were so fascinating? And I feel so much calmer while I watch...* Radio calms me if it is engaging, Enrages me when it isn't. The increased volume of radio commercials and makes me want to firebomb car dealers and other radio advertisers. I am engaged only when I get a constant stream of just the right music or engaging information from people I respect. I can pretty much only listen to PBS and internet radio today.* Movies often bore me, unless they hit the right psychological note. Can't stand to watch shoot-em-ups, blow-em-ups, superpower-them-ups, hack-em-ups. Have to watch movies that show me nuance and psychological realities. When I do have to watch silly movies with my children, have to analyze the symbolism to death. * Always felt different. Always knew there was something wrong with me. Always felt lonely. Couldn't put my finger on the problem with me.* Couldn't achieve my potential. Couldn't even come close.* Verbally Impulsive. Have great trouble concealing a negative emotional reaction.* Will freely express a negative opinion of an idea. Can't understand why that would bother the other person. After all, I was only trying to help improve the idea... * Am not strongly attached to my own ideas. They come and go fast anyways. If you shoot it down, I'll go back to the drawing board and comeback with another.* Consistently underestimate the time I need to complete tasks.The only real thing I can add to what others have written is the depression and self-doubt. If you allow it to get to you, it can be so demoralizing to lose your wallet, phone or keys every morning. To once again leave the house without remembering that form you were supposed to return to the kids school. It sucks to constantly feel you are disappointing others. It sucks to feel you don't know how to love other people because your attention wanders the moment their needs don't require your focused attention. It sucks to know you set a bad example for your children. It sucks to know in the moment you are becoming obsessed over something inconsequential and have pursued it far beyond the point of behaving productively. It sucks to feel that you are self-centered because your need to have your anxiety reassured is so important you often can't suspend it when you should.ADD is the best of times and the worst of times. Sometimes I feel so powerful because it is so easy to put that blowhard in his place by pointing out the myriad flaws in his argument. Sometimes I feel so self-confident because I don't give a fuck what people think of me so I can say what I want. Sometimes I feel so awesome because I can do things with my brain others find incredible. Sometimes I feel hopeless because I can't get up off the couch to do the simple things that must get done today.
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What does stealth actually mean in fighter jets?
The best knowledge is gained when encapsulated in a story....— The UpanishadsThe stealth story actually began in July 1975. An exceptional thirty-six-year-old Skunk Works mathematician and radar specialist named Denys Overholser decided to drop by the office of Ben Rich, Skunk Works chief, one April afternoon and presented him with the Rosetta Stone breakthrough for stealth technology.The gift he handed to Rich over a cup of decaf instant coffee would make an attack airplane so difficult to detect that it would be invulnerable against the most advanced radar systems yet invented, and survivable even against the most heavily defended targets in the world.Denys had discovered this nugget deep inside a long, dense technical paper on radar written by one of Russia’s leading experts and published in Moscow nine years earlier. That paper was a sleeper in more ways than one: called “Method of Edge Waves in the Physical Theory of Diffraction,” it had only recently been translated by the Air Force Foreign Technology Division from the original Russian language. The author was Pyotr Ufimtsev, chief scientist at the Moscow Institute of Radio Engineering. As Denys admitted, the paper was so obtuse and impenetrable that only a nerd’s nerd would have waded through it all — underlining yet! The nuggets Denys unearthed were found near the end of its forty pages. As he explained it, Ufimtsev had revisited a century-old set of formulas derived by Scottish physicist James Clerk Maxwell and later refined by the German electromagnetics expert Arnold Johannes Sommerfeld. These calculations predicted the manner in which a given geometric configuration would reflect electromagnetic radiation. Ufimtsev had taken this early work a step further.“Ben, this guy has shown us how to accurately calculate radar cross sections across the surface of the wing and at the edge of the wing and put together these two calculations for an accurate total.”Radar cross section calculations were a branch of medieval alchemy as far as the non-initiated were concerned. Making big objects appear tiny on a radar screen was probably the most complicated, frustrating, and difficult part of modern warplane designing. A radar beam is an electromagnetic field, and the amount of energy reflected back from the target determines its visibility on radar. For example, the B-52, the mainstay long-range bomber of the Strategic Air Command for more than a generation, was the equivalent of a flying dairy barn when viewed from the side on radar. The F-15 tactical fighter was as big as a two-story Cape Cod house with a carport. It was questionable whether the F-15 or the newer B-70 bomber would be able to survive the ever-improving Soviet defensive net. The F-111 tactical fighter-bomber, using terrain-following radar to fly close to the deck and “hide” in ground clutter, wouldn’t survive either. Operating mostly at night, the airplane’s radar kept it from hitting mountains, but as the US discovered in Vietnam, it also acted like a four-alarm siren to enemy defenses that picked up the F-111 radar from two hundred miles away. America desperately needed new answers, and Ufimtsev had provided them with an “industrial-strength” theory that now made it possible to accurately calculate the lowest possible radar cross section and achieve levels of stealthiness never before imagined.“Ufimtsev has shown us how to create computer software to accurately calculate the radar cross section of a given configuration, as long as it’s in two dimensions,” Denys told Rich. “We can break down an airplane into thousands of flat triangular shapes, add up their individual radar signatures, and get a precise total of the radar cross section.”The Skunk Works would be the first to try to design an airplane composed entirely of flat, angular surfaces, and that became the F-117A.It’s August 1979 on the scorching Nevada desert, where Marines armed with ground-to-air Hawk missiles are trying to score a “kill” against my new airplane, an experimental prototype code-named Have Blue. We in the Skunk Works have built the world’s first pure stealth fighter, which is designed to evade the Hawk’s powerful radar tracking. The Marines hope to find Have Blue from at least fifty miles away and push all the right buttons so that the deadly Hawks will lock on. To help them, I’ve actually provided Have Blue’s flight plan to the missile crew, which is like pointing my finger at a spot in the empty sky and saying, “Aim right here.” All they’ve got to do is acquire the airplane on radar, and the homing system inside the Hawk missile will do the rest. Under combat conditions, that airplane would be blasted to pieces. If that defensive system locks on during this test, our experimental airplane flunks the course.But I’m confident that our stealth technology will prove too elusive for even this Hawk missile’s powerful tracking system (capable of detecting a live hawk riding on the thermals from thirty miles away). What makes this stealth airplane so revolutionary is that it will deflect radar beams like a bulletproof shield, and the missile battery will never electronically “see” it coming. On the Hawk’s tracking system, our fighter’s radar profile would show up as smaller than a hummingbird’s. At least, that’s what I’m betting. If I’m wrong, I’m in a hell of a bind.Half the Pentagon’s radar experts think we at the Skunk Works have achieved a stealth technology breakthrough that will revolutionize military aviation as profoundly as the first jets did. The other half thinks we are deluding ourselves and everyone else with our radar test claims. Those cynics insist that we are trying to pull a fast one—that we’ll never be able to duplicate on a real airplane the spectacular low visibility we achieved on a forty-foot wooden model of Have Blue, sitting atop a pole on a radar test range. Those results blew away most of the Air Force command staff. So this demonstration against the Hawk missile is the best way I know to shut up the nay-sayers definitively. This test is “In your face, buddy,” to those bad-mouthing our technology and our integrity. My test pilot teased me that Vegas was giving three to two odds on the Hawk over Have Blue. “But what do those damned bookies know?” he added with a smirk, patting my back reassuringly.Because our stealth test airplane has been under the tightest security, we’ve had to deceive the Marines into thinking that the only thing secret about our airplane is a black box it’s supposed to be carrying in its nose that emits powerful beams to deflect incoming radar. Of course, that’s all bogus. No such black box aboard, no beams involved. The invisibility comes entirely from the airplane’s shape and its radar-absorbing composite materials.The missile crew will monitor the test on their radar scope inside their windowless command van, but a young sergeant standing beside me will be able to verify that, despite the blank screen, an airplane indeed flew overhead. God knows what he will think seeing our airplane in the sky, a weird diamond-shaped UFO, looking as if it escaped from a trailer for a new George Lucas Star Wars epic.I check my watch. Eight in the morning. The temperature already in the nineties, heading toward a predicted high of one-twenty F. Have Blue should be well inside the missile’s radar track, heading for us. And in a few moments I spot a distant speck growing ever larger in the milky blue sky. I watch Have Blue through my binoculars as it flies at eight thousand feet. The T-38 chase plane, which usually flies on its wing in case Have Blue develops problems and needs talking down to a safe landing, is purposely following miles behind for this test. The radar dish atop the van hasn’t moved, as if the power has been turned off. The cluster of missiles, which normally would be swiveling in the launcher, locked on by radar to the approaching target, are instead pointing aimlessly (and blindly) toward distant mountains. The young sergeant stares in disbelief at the sightless missiles, then gapes as the diamond-shaped aircraft zips by directly above us. “God almighty,” he exclaims, “whatever that thing was, sir, it sure is carrying one hell of a powerful black box. You jammed us dead.”“Looks that way.” I say and grin.I head to the command van, and a cold blast of the air-conditioning greets me as I step inside. The Marine crew is still seated around their electronic gear with stolid determination. Their scope screen is empty. They’re waiting. As far as they know, nothing has yet flown into their radar net. Suddenly a blip appears. It’s moving quickly west to east in the exact coordinates of Have Blue.“Bogie acquired, sir,” the radar operator tells the young captain in charge.For a moment I’m startled, watching a moving blip that should not be. And it is big, unmistakable.“Looks like a T-38, sir,” says the operator.I exhale. The T-38 chase plane is being acquired by their radar detection. The radar operator has no idea that two airplanes should be on his scope—not one—and that he never did pick up Have Blue as it flew overhead.“Sorry, sir,” the young captain says to me with a smug sneer.“Looks like your gizmo isn’t working too good.” Had this been a combat situation, the stealth fighter could have used high-precision, laser-guided bombs against the van and that smug captain would never have known what hit him. Might have taught him a lesson in good grammar too.The van door opens and the young sergeant steps into the dark coolness, still looking as if he had hallucinated in the desert heat—seeing with his own eyes a strange diamond apparition that his missiles failed to lock onto.“Captain,” he began, “you won’t believe this…”— first flight of the F-117A stealth tactical fighter developed at Lockheed’s “Skunk Works,” formally known as Advanced Development Projects.Ben R Rich succeeded the legendary Kelly Johnson at Lockheed Skunk works and directed the secret development of the first stealth aircraft, the F-117A.
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