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cybersecurity_181328 | cybersecurity | Did I just get DNS Hijacked? | I went online on my Macbook today and noticed my iTunes complaining that it couldn't connect to Apple, I tried logging out and in of my account but weirdly it said it couldn't log in; I didn't think much of it at first as I thought maybe it was iTunes just being more buggy than usual. However then I noticed something r... | 140 | [
"dns",
"router"
] | {
"A": "Yes, your router's primary DNS entry was pointed to a rogue DNS server to make devices in your network resolve apple.com and other domains to phishing sites instead. The router possibly got compromised through an unpatched vulnerability in its firmware. I have an Asus AC87U, FW Version 3.0.0.4.380.7743 (1 rel... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/181328/did-i-just-get-dns-hijacked |
law_84309 | law | Can Prince Harry wear the uniforms of his former units? | It's been in the news recently that Prince Harry has been banned from wearing a military uniform at the events surrounding the late Queen's funeral, since he was stripped of his honorary military titles when he stopped being a working royal. However, he is a veteran who served ten years in the British military and was ... | 34 | [
"united-kingdom",
"military"
] | {
"A": "By Army regulations, no, he's not allowed to wear that uniform. Prince Harry technically isn't a \"retired officer\". Rather, he resigned his commission in the Army, effective 19 June 2015. See the London Gazette for 11 August 2015, Supplement 61319, page 14838 , under \"Captain H. C. A. D. WALES 564673\". Ac... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/84309/can-prince-harry-wear-the-uniforms-of-his-former-units |
law_78970 | law | Can I get reimbursed if police shot the window of my car during a standoff? | My car was parked in the parking lot of a large chain grocery store, upon returning to my car I found the police in a standoff with a suspect with my vehicle right at the center. I asked if I could move my car but the officers got angry and started ignoring me. SWAT team got called in and it ended with them firing and ... | 35 | [
"police",
"property",
"texas",
"vehicle",
"governmental-liability"
] | {
"A": "Most leases have a provision allowing a landlord to make entry without notice in an emergency, but the better course of action, as noted in a comment by @BlueDogRanch, is to call the police and ask them to make a \"welfare check.\" You would ordinarily be permitted to cooperate with police by unlocking doors ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/78970/can-i-get-reimbursed-if-police-shot-the-window-of-my-car-during-a-standoff |
finance_8843 | finance | What are modern algorithms for trade classification? | When dealing with trade data, for example from TAQ, a common problem is that of determining whether a trade was a buy or a sell . The most commonly used classifier is the Lee-Ready algorithm ( Inferring trade direction from intraday data , 1991). Unfortunately, this method is known to be inaccurate: Lee and Radhakrishn... | 26 | [
"market-microstructure"
] | {
"A": "The risk-neutral measure $\\mathbb{Q}$ is a mathematical construct which stems from the law of one price , also known as the principle of no riskless arbitrage and which you may already have heard of in the following terms: \"there is no free lunch in financial markets\". This law is at the heart of securitie... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/8843/what-are-modern-algorithms-for-trade-classification |
law_683 | law | USA: Is "I am not a lawyer" disclaimer generally necessary? | Is it legally necessary to disclaim "I am not a lawyer" when engaging in casual conversation, writing Internet posts, etc. to avoid civil or criminal liability for one's comments? Specifically, in the absence of: claims to be a lawyer or implied claims (i.e. posing) accepting payment or other compensation for legal adv... | 39 | [
"united-states",
"liability",
"unlicensed-practice"
] | {
"A": "Short Answer Applicants are required by military regulation to have a percentile score on a standardized test called the ASVAB that is 31 or more, which is roughly comparable to an IQ score on the Stanford-Binet scale of a little bit less than 92, for high school graduates seeking to enter the Army or Navy (o... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/683/usa-is-i-am-not-a-lawyer-disclaimer-generally-necessary |
cybersecurity_183658 | cybersecurity | 4-dial combination padlock: Is it more secure to zero it out or to blindly spin the dials after locking? | I am partially responsible for some resources protected by a 4-dial combination lock like this one : There are two things that people will usually do after they've locked it: reset all the digits to 0, so that the combination reads 0000, or mash around on the dials a bit so that the combination reads something else. I ... | 156 | [
"physical",
"locks",
"padlocks"
] | {
"A": "TL;DR - You can store the salt in plaintext without any form of obfuscation or encryption, but don't just give it out to anyone who wants it. The reason we use salts is to stop precomputation attacks, such as rainbow tables . These attacks involve creating a database of hashes and their plaintexts, so that ha... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/183658/4-dial-combination-padlock-is-it-more-secure-to-zero-it-out-or-to-blindly-spin |
medicine_357 | medicine | Do vaccines cause autism? | It seems the question of vaccine harm has been around at least as long as vaccines 1 . Specifically, the claim that vaccines can cause or contribute to autism has been hotly debated in the last decade. Many claim that there is a dangerous (possibly hidden) link. What is the current state of medical research on this top... | 41 | [
"vaccination",
"autism"
] | {
"A": "I believe that those lines are craze lines. \"Craze lines are merely cracks in the enamel that do not extend into the dentin.\" They occur because of stress in your teeth, ie: grinding your teeth, biting your nails, and even routine use of your teeth. What you've said also matches up with craze lines in that ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/357/do-vaccines-cause-autism |
cybersecurity_32917 | cybersecurity | How is an ATM secure? | I'm curious why an ATM computer is considered secure. The general adage of "If an attacker has physical access to my machine, all bets are off," seems to not apply in this circumstance (since everyone has physical access to the machine). Why is this? I thought of the fact that many have security cameras placed over the... | 182 | [
"attack-prevention",
"physical",
"atm"
] | {
"A": "I think the assumption here is wrong. They don't have physical access to the machine. They have supervised access to a very limited control panel for a machine which is built into a bomb-proof safe, bolted to the ground and hooked up to an alarm system with an armed response force. Get the machine out of the ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/32917/how-is-an-atm-secure |
cybersecurity_159331 | cybersecurity | How is the "WannaCry" Malware spreading and how should users defend themselves from it? | There's a new strain of attacks which is affecting a lot of systems around the world (including the NHS in the UK and Telefonica in Spain) which is being called "WannaCry" amongst other names. It seems to be a both a standard phishing/ransomware attack but it's also spreading like a worm once it gets into a target netw... | 250 | [
"malware",
"ransomware",
"wannacry"
] | {
"A": "What do I do now? How do I get rid of the virus? The best option is what is referred to as \" nuke it from orbit .\" The reference is from Aliens : The idea behind this is that you wipe your hard drive and reinstall your OS. Before you do this, you should make sure you have the following: A way to boot your c... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/159331/how-is-the-wannacry-malware-spreading-and-how-should-users-defend-themselves-f |
cybersecurity_20129 | cybersecurity | How and when do I use HMAC? | I was reading HMAC on wikipedia and I was confused about a few points. Where do I use HMAC? Why is the key part of the hash? Even if someone successfully used a "length-extension attack", how would that be useful to the attacker? | 191 | [
"hmac"
] | {
"A": "This attack is supposed to be presented 10 days from now, but my guess is that they use compression . SSL/TLS optionally supports data compression. In the ClientHello message, the client states the list of compression algorithms that it knows of, and the server responds, in the ServerHello , with the compress... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/20129/how-and-when-do-i-use-hmac |
finance_44 | finance | What methods do you use to improve expected return estimates when constructing a portfolio in a mean-variance framework? | One of the main problems when trying to apply mean-variance portfolio optimization in practice is its high input sensitivity. As can be seen in ( Chopra , 1993) using historical values to estimate returns expected in the future is a no-go, as the whole process tends to become error maximization rather than portfolio op... | 31 | [
"modern-portfolio-theory",
"mean-variance",
"expected-return",
"estimation"
] | {
"A": "Wavelets are just one form of \"basis decomposition\". Wavelets in particular decompose in both frequency and time and thus are more useful than fourier or other purely-frequency based decompositions. There are other time-freq decompositions (for instance the HHT) which should be explored as well. Decompositi... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/44/what-methods-do-you-use-to-improve-expected-return-estimates-when-constructing-a |
engineering_7344 | engineering | Why is Mach 0.3 the threshold separating compressible and incompressible flow? | I've read that Mach 0.3 is pretty much the upper limit for treating air as an incompressible fluid. The sources I've read seem to treat this as a given, without proof or justification. Why is this the limit? Is there a mathematical justification for this? Also, does this limit only apply to air? If not, then what does ... | 14 | [
"fluid-mechanics"
] | {
"A": "Water meets the low compressibility requirement, but there are many other considerations in the design of a hydraulic system: Boiling point/vapor pressure: If the system warms up during operation, the fluid may boil, which results in high compressibility and thus decreased effectiveness of the hydraulic syste... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/7344/why-is-mach-0-3-the-threshold-separating-compressible-and-incompressible-flow |
engineering_89 | engineering | Additional jacking force to overcome stiction/dry friction | It is common to lift bridges to replace bearings, etc. In an ideal world the lifting capacity required of the jacks would be the self-weight of the bridge divided by the number of jacks (+ allowances for wind/snow, etc.). From my (limited) experience, however, bridges begin to 'stick' to their bearings, and an addition... | 13 | [
"civil-engineering",
"structures",
"bridges",
"maintenance",
"friction"
] | {
"A": "So there's an incorrect assumption underlying your question. In an ideal world the lifting capacity required of the jacks would be the self-weight of the bridge divided by the number of jacks (+ allowances for wind/snow, etc.). And the assumption there is that the lifting capacity is equivalent only to the we... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/89/additional-jacking-force-to-overcome-stiction-dry-friction |
engineering_7536 | engineering | Why would you launch a large ship by dropping it sideways? | I'm referring to the process shown in this video: https://youtu.be/Quyr5R1Rbfw?t=20 Or this image from Wikipedia: In it, a large warship is launched into the water by essentially dropping it sideways down some ramps and off of a pier. The ship rolls hard to one side, and then oscillates back to the other, making the pr... | 25 | [
"mechanical-engineering",
"structural-engineering",
"safety",
"naval-engineering",
"ships"
] | {
"A": "Some ideas: Wheel Load Distribution : The load is greater on the rear wheels providing the power; more force on the front ones bring no benefit and would provide less traction. Better manoeuvrability from having a shorter wheelbase. Better Ground Clearance in some conditions, especially for bumps and or up a ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/7536/why-would-you-launch-a-large-ship-by-dropping-it-sideways |
engineering_207 | engineering | How do engineers really use numerical simulation? | Disclaimer I'm an applied mathematician by training, not an engineer. My work research primarily focuses on creating new "methods" to solve different PDE's related to solid deformation (elasticity) and fluid mechanics. In this sense, i know how to solve a pde problem computationally. From my perspective, engineers use ... | 21 | [
"modeling"
] | {
"A": "Biggest advantage is that when connecting to trailers, there are no bleeding issues. Imagine having to connect hydraulic pipes and remove the air bubbles... As for the amount of air - the compressor and receiving tanks are designed for normal use. However if you wish to accompany AC/DC with the air brakes you... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/207/how-do-engineers-really-use-numerical-simulation |
engineering_49207 | engineering | What is the lowest point below sealevel that we have built where a human can go? | According to google searches, the Jinping Underground Laboratories are the "deepest" building or buildings constructed, reaching 7900 feet (2400 metre) below the surface.... However, the surface in question is a mountain. While that does classify as underground, it highlights a flaw in the question of the deepest under... | 31 | [
"civil-engineering",
"architecture"
] | {
"A": "Trees increase the turbulence of the air that reaches the turbines. That creates all sorts of uneven, rapidly-shifting loads on the blades and structure. That increases the maintenance costs, decreases availability, decreases the capacity factor, and decreases the life expectancy of the turbine. So, higher co... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/49207/what-is-the-lowest-point-below-sealevel-that-we-have-built-where-a-human-can-go |
cybersecurity_200243 | cybersecurity | All 0s (zeros) in a bank card's CVC code | My bank card recently expired. I got a new one and this one turned out to be "lucky": its CVC code was 000 . For a few months I used it extensively, both online and offline, without any difficulties - until the day when I entered my card details on Booking.com. I filled in the form, clicked "submit" - only to see the p... | 239 | [
"credit-card"
] | {
"A": "I was curious about the same thing, so I put Gbt3fC79ZmMEFUFJ into Google, and lo! and behold it found something that wasn't just a paraphrase of \"Don't use this password\" advice — the password itself was embedded in example source code that showed how you could send a password to a server! ( link to page ,... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/200243/all-0s-zeros-in-a-bank-cards-cvc-code |
medicine_6 | medicine | What should I consider when deciding to remove a blister or not? | While playing indoor soccer a couple days ago, I was fouled and fell forwards so that my hand skidded across the court a bit. It left the blister as you see in the image here: What should I consider when deciding to remove this blister? I could open and drain this blister, removing the excess skin afterwards, or leave ... | 26 | [
"wound",
"removal"
] | {
"A": "In the blister shown, the likelihood of rupture is decreased because of the thickness of the epidermis on the palm of the hand, so you can leave it alone until the underlying area re-epithelializes. You'll know this is happening because of the decreased pain and the slow reabsorption of the fluid. Eventually ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/6/what-should-i-consider-when-deciding-to-remove-a-blister-or-not |
law_43764 | law | What if a restaurant suddenly cannot accept credit cards, and the customer has no cash? | If a restaurant normally accepts credit cards, and a customer eats a meal there, then tries to pay with his valid credit card, and the cashier says the credit card system is down and they can only accept cash today, and the customer has no cash, and no easy way to get cash, can the customer legally leave without ever p... | 39 | [
"united-states",
"debt"
] | {
"A": "There is no intention to commit theft, so there is no criminal act on the part of the customer. Even if there was a criminal act, the ability of the restaurant to detain the cusomer (citizen's arrest) is very limited in most jurisdictions. The restaurant can ask the customer for his name and address, but ther... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/43764/what-if-a-restaurant-suddenly-cannot-accept-credit-cards-and-the-customer-has-n |
finance_8274 | finance | How to estimate real-world probabilities | In the world of finance, Risk-neutral pricing allow us to estimate the fair value of derivatives using the risk free rate as the expected return of the underlyings. However, the behavior of financial assets in the real-world might be substantially different to the evolution used in a risk-neutral context. For instance,... | 42 | [
"derivatives",
"risk-neutral-measure",
"forecasting",
"stochastic-discount",
"real-world-measure"
] | {
"A": "In general there are two basic ways to make money out of your option pricing models: Sell side (market maker, risk neutral): You use these models to calculate your greeks to hedge your portfolio, so that you live on the spread. Buy side (market/risk taker): You use your model to find mispriced options in the ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/8274/how-to-estimate-real-world-probabilities |
medicine_26258 | medicine | Is SM-102 a safe ingredient in the Moderna vaccine, despite these safety warnings? | I recently saw a post online which called into question the safety of the Moderna vaccine through an interesting argument. One of the ingredients in the Moderna COVID-19 vaccine is the ionizable amino lipid SM-102. [Source] Information about this chemical can be found on this website . As expected, the description of t... | 21 | [
"covid-19",
"vaccination",
"safety",
"lipids"
] | {
"A": "The MSDS linked to is for a product sold as a solution of 10% SM-102 in 90% chloroform. It's listed as \"SM-102\" because that's the interesting/useful thing that the company is selling. It's common for chemicals to be sold packaged with solvents to make a solution. Sometimes that solvent is just water, but i... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/26258/is-sm-102-a-safe-ingredient-in-the-moderna-vaccine-despite-these-safety-warning |
finance_3284 | finance | Is "eoddata" a good data source? | Not sure if this is a relevant question for site, but I am looking to move to www.eoddata.com as my data source. If anyone has used it, can you tell me how the data quality is ? I am currently parsing yahoo for my prices but its not a very efficient process. What are the other sources of equity data out there ( afforda... | 24 | [
"data",
"market-data"
] | {
"A": "Yahoo rounds the adjusted price to 2 decimals even though dividend amounts often have 3 decimal places. Since they apply the adjustment formula to adjusted prices, if you go far enough back in time, the value they give for Adjusted Price will be different than it would be if there were no rounding. edit: For ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/3284/is-eoddata-a-good-data-source |
engineering_5570 | engineering | How was Volkswagen able to trick the lab pollution test? | The recent Volkswagen pollution test cheating scandal has shocked many people with its widespread extent as well as how it was hidden for so many years. Last year, the International Council on Clean Transportation (ICCT) in Washington DC contracted scientists from the Center for Alternative Fuels Engines and Emissions ... | 52 | [
"automotive-engineering",
"product-testing",
"air-quality",
"emissions"
] | {
"A": "After the 2014 ICCT report revealed that these light-duty passenger diesel vehicles were emitting too much NOx and US regulators confronted VW about the results, VW did some testing and proposed a voluntary software recall to recalibrate the various emissions control devices on the affected vehicles. From the... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/5570/how-was-volkswagen-able-to-trick-the-lab-pollution-test |
medicine_120 | medicine | Why do doctors prescribe steroid tablets even though they know the side effects? | Sometimes doctors prescribe steroid tablets to suppress pain for diseases, such as arthritis . Why do they prescribe it even though they know the side effects? | 29 | [
"medications",
"steroids",
"side-effects"
] | {
"A": "I think a missing bit of information that might help you get a better sense of this practice is: steroids are miracle drugs. OK, that was in jest - no miracles here. Truth be told, though, if there is a single class of drugs that has added more quality-adjusted life-years to human history than any other, ster... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/120/why-do-doctors-prescribe-steroid-tablets-even-though-they-know-the-side-effects |
finance_334 | finance | Does mean-variance portfolio optimization provide a real edge to those who use it? | Mean-variance optimization (MVO) is a 50+ year concept, and perhaps the first seminal idea of quantitative finance. Still, as far as I know, less than 25% of AUM in the US is quantitatively managed. While a small minority of fundamental managers use MVO, that is counterbalanced by statistical arbitrage and HF strategie... | 24 | [
"mean-variance",
"optimization"
] | {
"A": "I would offer the distinctions are i) pure statistical approach, ii) equilibrium based approach, and iii) empirical approach. The statistical approach includes data mining. Its techniques originate in statistics and machine learning. In its extreme there is no a priori theoretical structure imposed on asset r... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/334/does-mean-variance-portfolio-optimization-provide-a-real-edge-to-those-who-use-i |
law_2223 | law | Why does browser cache not count as copyright infringement? | My browser is saving a copy of the web pages I visit on my computer. How is that not copyright infringement? in this answer I read: I would hazard a guess that displaying an HTML webpage online is implicitly allowing others to read that code How does that imply that you can make a local copy, when a web page includes a... | 40 | [
"united-states",
"copyright",
"european-union"
] | {
"A": "If you are not a member of the Bar of Maryland, you may not \"practice, attempt to practice, or offer to practice law in the State unless admitted to the Bar.\" Maryland Business Occupations and Professions § 10-601 . \"Practicing law\" includes \"representing another person before a unit of the State governm... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/2223/why-does-browser-cache-not-count-as-copyright-infringement |
medicine_4058 | medicine | Are there any side effects to cracking knuckles? | I constantly crack (or pop) my knuckles. Are there any negative (or positive) side effects to it? I like to crack my knuckles, but I want to stop if it can have negative effects. What have scientific studies said about this subject? | 16 | [
"musculoskeletal-system"
] | {
"A": "A common medical myth is that cracking your knuckles causes arthritis, but is has been shown that cracking your knuckles, and popping your joints in general, will not raise your risk for developing arthritis. 1 It has also been shown to not cause degenerative joint disease in your hand joints in old age. 2 Ho... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/4058/are-there-any-side-effects-to-cracking-knuckles |
engineering_531 | engineering | What is a reason that handlebars fit to a motorcycle and steering wheel fit to a car? | What is the reason that handlebars are installed on motorcycles and steering wheels are installed on cars? Notice that the way to use both handlebars and steering wheels are quite similar, but a steering wheel allows for much more rotation than a handle bar when you control a vehicle. Please give me a reason why a mass... | 22 | [
"mechanical-engineering"
] | {
"A": "The turbulence model can make a big difference in your simulation . There are many turbulence models around. It becomes a tough job to select one out of them. There is no perfect turbulence model. It all depends on several parameters like Reynold's number, whether the flow is separated, pressure gradients, bo... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/531/what-is-a-reason-that-handlebars-fit-to-a-motorcycle-and-steering-wheel-fit-to-a |
law_87343 | law | Does Elon Musk have any grounds for legal action against people who track his plane? | Most airplanes, including Elon Musk's private jet, are required by law to broadcast their location throughout a flight in a well-documented, unencrypted digital format called ADS-B. This system is a critical part of aviation safety infrastructure. Several services, such as FlightAware, FlightRadar24, and ADS-B Exchange... | 41 | [
"united-states",
"privacy",
"freedom-of-speech",
"first-amendment",
"air-travel"
] | {
"A": "Specifically, the threatened action is about stalking and implicit threats to his family. I'm not suggesting that there is a lot of merit to the claim, but that is how he is presenting the argument. The question would be where there is an intentional, repeated following of a person for the purpose of harassin... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/87343/does-elon-musk-have-any-grounds-for-legal-action-against-people-who-track-his-pl |
cybersecurity_185908 | cybersecurity | Why is Mother’s Maiden Name still used as a security question? | From time to time, some web sites asks to enter a security question and an answer for it. The question list is standard and it usually includes "What is your mother's maiden name?". Some people use their mother's real maiden name so that they are sure they can remember what to provide when asked (e.g. as part of the pr... | 164 | [
"authentication",
"secret-questions"
] | {
"A": "Diffie-Hellman is a way of generating a shared secret between two people in such a way that the secret can't be seen by observing the communication. That's an important distinction: You're not sharing information during the key exchange, you're creating a key together. This is particularly useful because you ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/185908/why-is-mother-s-maiden-name-still-used-as-a-security-question |
law_85905 | law | Why does it matter that a group of January 6 rioters went to Olive Garden for dinner after the riot? | CNN has an article pointing out that the rioters went to Olive Garden for dinner and spent $400 after the riot. The article implies that where they went for dinner, and how much they spent, is relevant to their trial. Why does it matter where they go for dinner and how much they spend? What they did at the Capitol was ... | 35 | [
"united-states",
"jan-6"
] | {
"A": "Legally speaking, very many nations grant asylum, and religious persecution is one of the most basic grounds for granting asylum, following the 1951 Refugee Convention . This newspaper article compares asylum statistics in Ireland versus other parts of Europe. The Irish immigration authorities spell out the d... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/85905/why-does-it-matter-that-a-group-of-january-6-rioters-went-to-olive-garden-for-di |
cybersecurity_49234 | cybersecurity | Why are chips safer than magnetic stripes? | After the recent Target hack there has been talk about moving from credit cards with magnetic stripes to cards with a chip. In what ways are chips safer than stripes? | 183 | [
"credit-card",
"smartcard"
] | {
"A": "I was curious about the same thing, so I put Gbt3fC79ZmMEFUFJ into Google, and lo! and behold it found something that wasn't just a paraphrase of \"Don't use this password\" advice — the password itself was embedded in example source code that showed how you could send a password to a server! ( link to page ,... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/49234/why-are-chips-safer-than-magnetic-stripes |
cybersecurity_116139 | cybersecurity | What is DROWN and how does it work? | There is a new recent attack "on TLS" named "DROWN" . I understand that it appears to use bad SSLv2 requests to recover static (certificate) keys. My question is: How? How can you recover static encryption or signature keys using SSLv2? Bonus questions: How can I prevent the attack from applying to me as a server admin... | 161 | [
"tls",
"openssl",
"attack-prevention"
] | {
"A": "This is commonly known as a capability URL / secret URL. It's secure in modern websites but not suitable for all applications and requires significant care to use . You can find an excellent overview of their advantages, risks and best practices in this page by W3C . It's meaningless to talk about security wi... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/116139/what-is-drown-and-how-does-it-work |
law_91096 | law | Can you make the police department pay for damage done to your property if you get swatted? | For purposes of conjecture, say some nameless online troll decides that they hate you. Perhaps you said you don't worship the members of a K-Pop band they like. As a result, they do some research and find your address. They then proceed to call your local police department, reporting a (fictional) hostage situation / h... | 39 | [
"united-states"
] | {
"A": "There is precedent for the idea that double jeopardy need not apply when the initial trial was a sham because the judge and/or jury had been bribed. See Aleman v. Judges of Cook County Circuit Court , 138 F.3d 302 (7th Cir. 1998) . This case was very similar to your hypothetical: Aleman was initially acquitte... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/91096/can-you-make-the-police-department-pay-for-damage-done-to-your-property-if-you-g |
law_80245 | law | Can I use my own Stack Exchange answer in a book? | I’ve seen some similar questions, but was wondering about a more specific case. I wrote a Stack Exchange answer, and would like to use it in one section of a book I’m writing (which will be commercially sold). I also modified the answer, and added to it, but some original passages remain. I’m wondering if, as the autho... | 37 | [
"united-states",
"copyright"
] | {
"A": "Through the legal doctrine of \"transferred intent\", wherein if one intends to murder A, and undertake actions to kill A, but one's actions kill B, one has murdered B. Whatever crimes one would have committed, had one performed them on one's intended target, are considered committed against the individual on... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/80245/can-i-use-my-own-stack-exchange-answer-in-a-book |
cybersecurity_50878 | cybersecurity | ECDSA vs ECDH vs Ed25519 vs Curve25519 | Among the Elliptic Curve Cryptography (ECC) algorithms available in OpenSSH (ECDH, ECDSA, Ed25519, Curve25519), which offers the best level of security, and (ideally) why? | 198 | [
"encryption",
"ssh",
"ecc"
] | {
"A": "Chrome not only stores your password text, it will show it to you. Under settings -> advanced -> manage passwords you can find all your passwords for all your sites. Click show on any of them and it will appear in the clear. Hashed passwords work for the site authenticating you. They are not an option for pas... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/50878/ecdsa-vs-ecdh-vs-ed25519-vs-curve25519 |
finance_10359 | finance | Is there an intuitive explanation for the Feynman-Kac-Theorem? | The Feynman-Kac theorem states that for an Ito-process of the form $$dX_t = \mu(t, X_t)dt + \sigma(t, X_t)dW_t$$ there is a measurable function $g$ such that $$g_t(t,x) + g_x(t, x) \mu(t,x) + \frac{1}{2} g_{xx}(t,x)\sigma(t,x)^2 = 0$$ with an appropriate boundary condition $h$: $g(T,x) = h(x)$. We also know that $g(t,x... | 37 | [
"brownian-motion",
"differential-equations"
] | {
"A": "There are some cases where you can blend your portfolios using weights directly. One case involves corner portfolios . In this case a linear combination of weights is also efficient. Another case is where you can treat the two separate weights you have produced each as distinct portfolio under the assumption ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/10359/is-there-an-intuitive-explanation-for-the-feynman-kac-theorem |
law_4755 | law | What if I say "this statement is false" while under oath? | Let's say I am in a court proceeding, and then make swear to tell the truth, the whole truth, and nothing but the truth. I tell the judge I would like to make an opening remark, he says yes, and I say "My opening remark is a false statement." What happens to me? If they claim that my statement is false and try to prose... | 38 | [
"rules-of-court"
] | {
"A": "This aspect (and many others) of contract law is applicable in the US and various countries of the EU. can they renege after the candidate has begun their journey, thus saddling the candidate with the travel cost? No. The company would incur breach of contract. There is no need for a formal contract. The cand... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/4755/what-if-i-say-this-statement-is-false-while-under-oath |
cybersecurity_988 | cybersecurity | Is BASIC-Auth secure if done over HTTPS? | I'm making a REST-API and it's straight forward to do BASIC auth login. Then let HTTPS secure the connection so the password is protected when the api is used. Can this be considered secure? | 457 | [
"tls",
"authentication",
"web-application",
"http",
"http-basic-auth"
] | {
"A": "The reason password expiration policies exist, is to mitigate the problems that would occur if an attacker acquired the password hashes of your system and were to break them. These policies also help minimize some of the risk associated with losing older backups to an attacker. For example, if an attacker wer... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/988/is-basic-auth-secure-if-done-over-https |
engineering_1785 | engineering | Why doesn't a lightning strike destroy the lightning rod? | Lightning strikes have been known to cause massive amounts of damage . The stats on a lightning bolt are: current levels sometimes in excess of 400 kA, temperatures to 50,000 degrees F., and speeds approaching one third the speed of light These are massive numbers, but lightning protection systems are designed to draw ... | 25 | [
"electrical-engineering"
] | {
"A": "As it happens, I just recently went through that calculation myself for a different site. Given the following facts from a quick web search, it isn't difficult to work out the numbers. The maximum efficiency of a (large) windmill is about 40%. The density of air is 1.225 kg/m 3 You need about 50 mW (10 mA at ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/1785/why-doesnt-a-lightning-strike-destroy-the-lightning-rod |
law_42984 | law | Is it legal for a supermarket to refuse to sell an adult beer if an adult with them doesn’t have their ID? | Today I went with my dad grocery shopping at a supermarket in New York (ShopRite) and he put a six-pack of beer in the cart. They then wouldn’t let him buy the beer because they couldn’t ID me (21, but I dress for work so I look more like 25). Even when I left the store to wait in the car they made him check out at a d... | 44 | [
"united-states",
"new-york-state",
"alcohol",
"is-x-legal",
"identification"
] | {
"A": "Technically anyone can sit on a jury. Lawyers are not automatically excluded from juries anymore, as being called for jury duty is a right and a duty that the law abhors automatically excluding people from. That is the official line on this. However, in reality, lawyers will always be stricken from serving by... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/42984/is-it-legal-for-a-supermarket-to-refuse-to-sell-an-adult-beer-if-an-adult-with-t |
cybersecurity_21168 | cybersecurity | How does Amazon bill me without the CVC / CVV / CVV2? | The card in question is a VISA, if that's of any importance. I've noticed this only on Amazon. All other sites I've purchased something from, ever , have needed the CVC code for the card. However, I know I never entered the CVC on Amazon when I added my card to it, and this has been bugging me ever since. How do they s... | 167 | [
"credit-card"
] | {
"A": "General SSL (and its successor, TLS ) is a protocol that operates directly on top of TCP (although there are also implementations for datagram based protocols such as UDP). This way, protocols on higher layers (such as HTTP) can be left unchanged while still providing a secure connection. Underneath the SSL l... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/21168/how-does-amazon-bill-me-without-the-cvc-cvv-cvv2 |
finance_11556 | finance | Why is the VIX futures market usually in a state of contango? | I'm a VIX newbie and I'm trying to understand why the VIX futures market is usually in a state of contango. All I can figure is that the sellers of VIX futures contracts demand high "prices" (because the seller is the holder of the short position and makes money when the price falls), and since there are willing buyers... | 28 | [
"volatility",
"futures",
"vix"
] | {
"A": "Your questions about contango in VIX futures have close analogies in options too. The Black & Scholes model suggests that all time frames and all strikes should have the same implied volatility, but they don't. I think one of the reasons is that the B&S model assumes that stock returns are distributed in a no... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/11556/why-is-the-vix-futures-market-usually-in-a-state-of-contango |
engineering_18806 | engineering | What limits the speed of a car? | From an engineering perspective, what limits the maximum speed you can reach with a regular car? I understand that some of the faster cars are for safety reasons limited to not run faster than say 250 km/h, but that's not my question. I can think of several reasons, but not sure which of these is relevant: Is the limit... | 17 | [
"mechanical-engineering",
"car"
] | {
"A": "Water meets the low compressibility requirement, but there are many other considerations in the design of a hydraulic system: Boiling point/vapor pressure: If the system warms up during operation, the fluid may boil, which results in high compressibility and thus decreased effectiveness of the hydraulic syste... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/18806/what-limits-the-speed-of-a-car |
cybersecurity_180561 | cybersecurity | Is "Have I Been Pwned's" Pwned Passwords List really that useful? | My understanding of Have I Been Pwned is that it checks your password to see if someone else in the world has used it. This really doesn't seem that useful to me. It seems equivalent to asking if anyone in the world has the same front door key as me. Statistically, I would assume yes, but without knowing where I live..... | 159 | [
"passwords",
"have-i-been-pwned"
] | {
"A": "Let's hope and assume that Facebook stores only hashes of current password (and potentially previous passwords). Here is what they can do: user sets first password to \"first\" and fb stores hash(\"first\"). later on, users resets password and is asked to provide new password \"First2\" Facebook can generate ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/180561/is-have-i-been-pwneds-pwned-passwords-list-really-that-useful |
medicine_1253 | medicine | Can an antipyretic (I.e. Aspirin) lower normal body temperature? | Is it possible for an antipyretic medication taken when not experiencing fever to cause a person's body temperature to drop below normal? I found one article that seems to say yes, but only for large doses (in mg/kg) in mice. | 14 | [
"medications",
"body-temperature",
"anti-inflammatory"
] | {
"A": "Assuming the person is not taking anticoagulants, it's actually quite difficult to bleed to death from dismemberment of small members (hands, feet, penis, ears, nose, etc). Even large members such as arms and legs are often survivable because the body is very good at protecting itself from blood loss. For exa... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/1253/can-an-antipyretic-i-e-aspirin-lower-normal-body-temperature |
finance_1177 | finance | Why is volatility mean-reverting? | We all know it does mean revert. The question is why. What's making volatility mean-revert? Is it some sort of cyclical behaviour of option traders? The way it's calculated? Why? | 27 | [
"volatility"
] | {
"A": "One starts with the Black-Scholes equation $$\\frac{\\partial C}{\\partial t}+\\frac{1}{2}\\sigma^2S^2\\frac{\\partial^2 C}{\\partial S^2}+ rS\\frac{\\partial C}{\\partial S}-rC=0,\\qquad\\qquad\\qquad\\qquad\\qquad(1)$$ supplemented with the terminal and boundary conditions (in the case of a European call) $... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1177/why-is-volatility-mean-reverting |
cybersecurity_188208 | cybersecurity | Do I need to encrypt connections inside a corporate network? | Provided that I have a decent level of physical security in the office, I monitor the physical addresses of devices connected to the network and only give VPN access to trusted parties, do I need to encrypt access to intranet resources over HTTP? There is an employee complaining that he doesn't like sending his credent... | 149 | [
"encryption",
"credentials",
"identity-theft",
"intranet"
] | {
"A": "Yes encrypt, it is easy. Plus according to a 2014 Software Engineering Institute study 1 in 4 hacks was from someone inside the company with an average damage 50% higher than an external threat actor. Link to source: https://insights.sei.cmu.edu/insider-threat/2017/01/2016-us-state-of-cybercrime-highlights.ht... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/188208/do-i-need-to-encrypt-connections-inside-a-corporate-network |
medicine_3658 | medicine | Risks of blood donation with autoimmune diseases | People with autoimmune diseases are generally either forbidden or discouraged from donating blood. Example: People who have autoimmune diseases (such as autoimmune thyroid disease, ankylosing spondylitis) are advised not to donate blood. This is because there is a small risk of causing immune system disturbance and sym... | 15 | [
"blood",
"autoimmune-disease",
"blood-donation"
] | {
"A": "I think a missing bit of information that might help you get a better sense of this practice is: steroids are miracle drugs. OK, that was in jest - no miracles here. Truth be told, though, if there is a single class of drugs that has added more quality-adjusted life-years to human history than any other, ster... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/3658/risks-of-blood-donation-with-autoimmune-diseases |
engineering_121 | engineering | Determining Drill Speed | How are spindle speeds calculated for a drill bit? I've seen dozens of charts that highlight the rpm that should be used for specific drill bit types, bit diameter, and material. However, what if my chart doesn't have the particular type of material or bit that I am using? I'd also like to have some intuition to know i... | 12 | [
"machining",
"mechanical-engineering"
] | {
"A": "For long freight trains and those that will be climbing to stations at higher altitudes, an extra or two locomotives are attached to the front. I've always wondered why. As usual there are multiple issues. Most important is landscape. If more power than a single locomotive can provide is not needed for the wh... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/121/determining-drill-speed |
engineering_226 | engineering | How different are dc motor designs from dc generator designs? | Some dc motors can be used as generators as well by applying mechanical torque to the output shaft to induce a current. However, even if a dc motor can do this, I imagine they were not designed for this purpose and thus perform less efficiently when used as a generator rather than as a motor. In my admittedly naive und... | 13 | [
"mechanical-engineering",
"electrical-engineering"
] | {
"A": "The current limit specification for a wire is limited by the heat that current will produce, and how much heat the wire can dissipate before getting too hot. \"Too hot\" depends on the circumstances. You will see higher current ratings for the same type of wire in chassis wiring applications than the electric... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/226/how-different-are-dc-motor-designs-from-dc-generator-designs |
medicine_21337 | medicine | How accurate are coronavirus tests? | As of time of writing it's quite common to see headlines about so-and-so who have tested positive for Covid-19, e.g. Canadian PM Justin Trudeau's wife, Sophie, tests positive for coronavirus, officials say However, these articles don't usually say how reliable the testing is. I couldn't find any recent information on i... | 20 | [
"covid-19"
] | {
"A": "Short answer: Sophie Trudeau's positive test may still mean 3 : 1 odds of not having contracted Covid-19, but the odds could also be far more towards having Covid-19. Justin Trudeau's negative test almost certainly means he was negative when tested. Of course, should Sophie be positive, that may have changed ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/21337/how-accurate-are-coronavirus-tests |
law_268 | law | What is the legal status of "warrant canaries"? | A warrant canary is a repeated claim by an individual or organization that they have not been served any warrants with an attached gag order. The idea is that you can say whatever you like if you have not been served such a warrant, but if you are ever served a warrant you simply stop publishing your warrant canary. At... | 40 | [
"united-states",
"freedom-of-speech"
] | {
"A": "The question actually asked, \"what legal theories would support or harm...\", is somewhat unclear. But what the questioner seems to be asking is, basically, what would happen if you tried it? The answer, it seems to me, is pretty straightforward. In the hypothetical case, you have been publishing a notice fo... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/268/what-is-the-legal-status-of-warrant-canaries |
engineering_5325 | engineering | If aircraft are pressurised, why do our ears pop during liftoff and landing? | Something hit me during my last flight: our ears feel that the pressure around us changes quickly during liftoff and landing, they hurt more and more until we make them pop. However, the cabin must maintain a level of oxygen higher than outside the aircraft because it isn't dense enough at ~10km to breathe normally. Do... | 17 | [
"pressure",
"aircraft-design"
] | {
"A": "The picture, below, of the exaggerated long section of the Channel Tunnel was taken from Wikipedia . Full-sized image here . Some of the limiting factors for the Channel Tunnel are: Railways don't like steep gradients The tunnels comprising the Channel Tunnel were excavated using tunnel boring machines (TBMs)... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/5325/if-aircraft-are-pressurised-why-do-our-ears-pop-during-liftoff-and-landing |
engineering_6 | engineering | What is the process of transferring an engineering license from the United States to Germany? | The United States have different rules about exactly how one obtains an engineering license, but the general process is the FE exam, a few years of work, and the PE exam. Suppose one then wishes to practice engineering in Germany. What are the legal requirements for doing so? | 12 | [
"licensure",
"international"
] | {
"A": "Unlike within the United States and the PE license , it doesn't appear that it's possible to receive an EUR ING license by direct comity . EU Engineering licensing is handled by FEANI , and on their EUR ING page they state: Application is open only to individuals if they are members of an engineering associat... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/6/what-is-the-process-of-transferring-an-engineering-license-from-the-united-state |
cybersecurity_36198 | cybersecurity | How to find live hosts on my network? | I am trying to find the live hosts on my network using nmap. I am scanning the network in Ubuntu using the command sudo nmap -sP 192.168.2.1/24 . However, I am unable to find the live hosts. I just get the network address of my own PC as live. When I see the DHCP client list through my browser (my router can be accesse... | 316 | [
"nmap",
"host-discovery"
] | {
"A": "General SSL (and its successor, TLS ) is a protocol that operates directly on top of TCP (although there are also implementations for datagram based protocols such as UDP). This way, protocols on higher layers (such as HTTP) can be left unchanged while still providing a secure connection. Underneath the SSL l... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/36198/how-to-find-live-hosts-on-my-network |
law_11565 | law | Pokémon Go hot spots and private property | As we all know Pokémon Go is all the rage. There have been reports that police stations are common hot spots for gyms and collections. Churches have also been a common hot spot. I think there is also a story where a man bought an old church and now that is his residence. Regardless of whether that story is true it made... | 43 | [
"privacy",
"property",
"trespass"
] | {
"A": "What is the legality of someone putting a virtual hot spot on your property without permission? I know we are in uncharted territory but how would this compare to setting up a contest that would require going on your property without permission? The existence of a game does not authorise entrance to private p... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/11565/pok%c3%a9mon-go-hot-spots-and-private-property |
engineering_150 | engineering | Do solar cells age? Why, and how? | As I heard, the life expectancy of photovoltaic cells is normally some decades, as so. This is very long, regarding their high cost, it has significant (negative) effect on the total costs. Why do they age? I can see the only possibility which could damage their atomic structure, and this is the very high energetic ult... | 14 | [
"photovoltaics"
] | {
"A": "The current limit specification for a wire is limited by the heat that current will produce, and how much heat the wire can dissipate before getting too hot. \"Too hot\" depends on the circumstances. You will see higher current ratings for the same type of wire in chassis wiring applications than the electric... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/150/do-solar-cells-age-why-and-how |
cybersecurity_202902 | cybersecurity | Is single quote filtering nonsense? | Penetration testers found out that we allow single quotes in submitted data fields, and want us to apply rules (input validation) to not allow them in any value. While I'm aware that single quotes are popular for SQL injection attacks, I strongly disagree that they should not be allowed as valid input. I am advocating ... | 239 | [
"penetration-test",
"sql-injection",
"validation"
] | {
"A": "Note: This answer was written in 2013. Many things have changed in the following years, which means that this answer should primarily be seen as how best practices used to be in 2013. The Theory We need to hash passwords as a second line of defence. A server which can authenticate users necessarily contains, ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/202902/is-single-quote-filtering-nonsense |
cybersecurity_6141 | cybersecurity | Amount of simple operations that is safely out of reach for all humanity? | Cryptographic primitives usually assert some security level given as number of operations to mount an attack. Hash functions, for example, give different security levels for collision attacks, preimage attacks and second preimage attacks. From these, "safe" key sizes are derived for different primitives. There are many... | 208 | [
"cryptography",
"research",
"theory"
] | {
"A": "In some circumstances, peppers can be helpful. As a typical example, let's say you're building a web application. It consists of webapp code (running in some webapp framework, ASP.NET MVC, Pyramid on Python, doesn't matter) and a SQL Database for storage. The webapp and SQL DB run on different physical server... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/6141/amount-of-simple-operations-that-is-safely-out-of-reach-for-all-humanity |
finance_2079 | finance | Skew arbitrage: How can you realize the skewness of the underlying? | It's not clear to me how to realize skewness. In other words, how do you implement skew arbitrage? There seems to be no well-known recipe like in volatility arbitrage . Volatility arbitrage (or vol arb) is a type of statistical arbitrage implemented by trading a delta neutral portfolio of an option and its underlier. T... | 37 | [
"options",
"volatility",
"trading",
"hedging",
"option-strategies"
] | {
"A": "I have worked on this topic extensively (pricing and calculating IV in production) and believe can offer an informed opinion. First of all Mathworks - the company that creates Matlab is not a trading firm so you should probably not rely on their advice so much. There are few closed form options pricing models... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/2079/skew-arbitrage-how-can-you-realize-the-skewness-of-the-underlying |
engineering_2125 | engineering | How is a mechanical system designed and tested without building a physical model? | I am new to mechanical engineering, although I have a scientific background (postgrad in Mathematics), and I (mostly) code for a living. I have an idea about creating a mechanical device; I envisage it will entail gears, linkages and actuators. I have a rough idea where things will fit but I would like to be able to te... | 13 | [
"mechanical-engineering",
"systems-design",
"computer-aided-design"
] | {
"A": "In the video you've linked to, the spheres are seen on both the leading and trailing edges of the propeller: I expect they are intentional - there are a number of ways to attach a propeller without having to disturb that surface, or using flush caps. Cavitation is caused by a drop in pressure. This would be s... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/2125/how-is-a-mechanical-system-designed-and-tested-without-building-a-physical-model |
cybersecurity_117605 | cybersecurity | What to do if stuck with website that has poor security? | I have a student loan account with a company, not the biggest company but big enough to where they should have their act together. Today I couldn't remember my password to log into my account dashboard. I clicked "forgot password" and they prompted me with 5 questions. First Name, Last Name, last 4-digit SSN, birthday,... | 150 | [
"passwords",
"account-security",
"web"
] | {
"A": "This is actually an interesting new field in infosec— reputation management . Employers, Law Enforcement and other government agencies, legal professionals, the press, criminals and others with an interest in your reputation will be observing all online activity associated with your real name. These \"interes... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/117605/what-to-do-if-stuck-with-website-that-has-poor-security |
law_38347 | law | Can I sign legal documents with a smiley face? | The signature on my driver's license is a unique and identifiable smiley face :-) I use this signature to sign all legally binding documents. A lot of the time, people reject it, and request an "actual signature". I then show them that it is the same signature as my driver's license, and they usually, (but not always,)... | 57 | [
"united-states",
"contract-law",
"signature"
] | {
"A": "Can I sign legal documents with a smiley face? Yes, that is lawful. A person's signature does not necessarily have to include the person's name or initials. What matters is that the signature reliably and unequivocally identifies the person who produces it, which apparently you have been able to prove by show... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/38347/can-i-sign-legal-documents-with-a-smiley-face |
engineering_6435 | engineering | Why does the Channel Tunnel enter the ground around 10 km from the coast? | I know that digging tunnels is always much more costly than building ways or train above ground. Why doesn't the Channel Tunnel start around the coastline? Why does it have an around 10 km long portion under land on the British side? | 21 | [
"civil-engineering",
"geotechnical-engineering",
"rail",
"tunnels"
] | {
"A": "From the point of view of the driver of a car, impacting another car is about as bad as crashing against an ideal wall (a wall with zero deformation whatsoever). If there were a plane reflection between the two cars, then vs. Car would be exactly equal to vs. Wall (the contact points between both cars would a... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/6435/why-does-the-channel-tunnel-enter-the-ground-around-10-km-from-the-coast |
cybersecurity_102873 | cybersecurity | How can USB sticks be dangerous? | We all know the story of the USB drive left outside a power plant which was found by a worker and inserted into a computer to see the contents which then allowed a hack to ensue. Here is my question, how? I get that code is executed but how? I would really like to be able to do this (for my own curiosity of course). I ... | 160 | [
"malware",
"virus",
"usb-drive"
] | {
"A": "This attack is supposed to be presented 10 days from now, but my guess is that they use compression . SSL/TLS optionally supports data compression. In the ClientHello message, the client states the list of compression algorithms that it knows of, and the server responds, in the ServerHello , with the compress... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/102873/how-can-usb-sticks-be-dangerous |
law_63838 | law | What is the legal distinction between Twitter banning Trump and Trump blocking individuals? | For reference, this recent NPR article contains all of the information that inspired this question. The lawsuits referenced in the above article center on then-President Trump blocking individual users on Twitter from interacting with or seeing his tweets. Lower courts apparently ruled that Trump's twitter feed is esse... | 39 | [
"constitutional-law",
"freedom-of-speech",
"us-federal-government",
"first-amendment",
"social-media"
] | {
"A": "Most leases have a provision allowing a landlord to make entry without notice in an emergency, but the better course of action, as noted in a comment by @BlueDogRanch, is to call the police and ask them to make a \"welfare check.\" You would ordinarily be permitted to cooperate with police by unlocking doors ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/63838/what-is-the-legal-distinction-between-twitter-banning-trump-and-trump-blocking-i |
law_5139 | law | Do I have legal rights against a company that offered me a raise to not leave, and then promptly fired me after turning down the other offer? | I was just informed of this situation that occurred somewhere by a co-worker, and was wondering what the legal ramifications are (U.S. Law). To be clear, the scenario is as follows: I tell my boss I've been offered a position at another company. My boss later comes to me with a counter offer of a raise, if I choose to ... | 40 | [
"united-states",
"employment"
] | {
"A": "Legally speaking, very many nations grant asylum, and religious persecution is one of the most basic grounds for granting asylum, following the 1951 Refugee Convention . This newspaper article compares asylum statistics in Ireland versus other parts of Europe. The Irish immigration authorities spell out the d... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/5139/do-i-have-legal-rights-against-a-company-that-offered-me-a-raise-to-not-leave-a |
law_73561 | law | Why isn't a draft (conscription) slavery? | The 13th Amendment bans all slavery except for "a punishment for crime whereof the party shall have been duly convicted." It doesn't appear to contain any language about military service or national security. A draft is involuntary work that there is no way to opt out of. They can send you anywhere in the world and for... | 55 | [
"united-states",
"military",
"slavery"
] | {
"A": "Yes, that’s allowed. Under the Stack Exchange terms of service , content you upload is licensed to Stack Exchange Inc. on a non-exclusive basis under CC-BY-SA 4.0. The terms of service do not give Stack Exchange the copyright to your contributions, and a non-exclusive license means you are not promising Stack... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/73561/why-isnt-a-draft-conscription-slavery |
law_58103 | law | Is it a real legal principle that any ambiguity in a contract is interpreted to the benefit of the side that did not write the contract? | I have heard that there is a legal principle where any ambiguity in the contract is interpreted to the benefit of the side that did not draw up or suggest the contract text . This was presented to me somewhat anecdotally, but sounded reasonable - so I'm not sure what to make of it. Is there any such or similar thing, f... | 39 | [
"civil-law",
"common-law",
"legal-concepts"
] | {
"A": "Technically anyone can sit on a jury. Lawyers are not automatically excluded from juries anymore, as being called for jury duty is a right and a duty that the law abhors automatically excluding people from. That is the official line on this. However, in reality, lawyers will always be stricken from serving by... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/58103/is-it-a-real-legal-principle-that-any-ambiguity-in-a-contract-is-interpreted-to |
cybersecurity_127092 | cybersecurity | Hardening Linux desktop machine against people from my household | I am looking to make a clean install of a Debian system on my home desktop. To clarify, I am switching from Windows and wish to use it as my day-to-day home OS - I'm not going to be running any servers or anything like that. I also have reason to believe that some members of my household (who have physical access to my... | 160 | [
"linux",
"privacy",
"physical-access"
] | {
"A": "Disclaimer: I am the author, creator, owner and maintainer of Have I Been Pwned and the linked Pwned Passwords service. Let me clarify all the points raised here: The original purpose of HIBP was to enable people to discover where their email address had been exposed in data breaches. That remains the primary... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/127092/hardening-linux-desktop-machine-against-people-from-my-household |
law_28180 | law | How does SE's arbitration clause hold up under the GDPR? | Today the new Terms of Service of Stack Exchange have been released, sparking a lot of unrest about its arbitration clause; see the comments and answers on the linked meta above, and also this question . Does the GDPR prevent Stack Exchange from using the arbitration clause against EU citizens? In the sense that when t... | 64 | [
"european-union",
"gdpr",
"arbitration"
] | {
"A": "Yes you can, and you can even include \"editorials or subjective content\". However, if you include factual statements, or words that imply factual statements, the company could claim that they are false, and therefore defamatory. Indeed they might claim that in any case. If you make no false statements of fa... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/28180/how-does-ses-arbitration-clause-hold-up-under-the-gdpr |
cybersecurity_78621 | cybersecurity | Which elliptic curve should I use? | I am currently renewing an SSL certificate, and I was considering switching to elliptic curves. Per Bernstein and Lange , I know that some curves should not be used but I'm having difficulties selecting the correct ones in OpenSSL: $ openssl ecparam -list_curves secp112r1 : SECG/WTLS curve over a 112 bit prime field se... | 128 | [
"openssl",
"ecc"
] | {
"A": "Note: This answer was written in 2013. Many things have changed in the following years, which means that this answer should primarily be seen as how best practices used to be in 2013. The Theory We need to hash passwords as a second line of defence. A server which can authenticate users necessarily contains, ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/78621/which-elliptic-curve-should-i-use |
finance_17859 | finance | Why dynamics of local volatility is wrong? | In Dupire's local volatility model, the volatility is is a deterministic function of the underlying price and time, chosen to match observed European option prices. To be more specific, given a smooth surface $(K,T)\mapsto C(K,T)$ where K is the strike and T is time to maturity. Dupire equation implies that there exits... | 25 | [
"local-volatility",
"dynamic"
] | {
"A": "I've worked at a hedge fund that allowed GA-derived strategies. For safety, it required that all models be submitted long before production to make sure that they still worked in the backtests. So there could be a delay of up to several months before a model would be allowed to run. It's also helpful to separ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/17859/why-dynamics-of-local-volatility-is-wrong |
medicine_15061 | medicine | Is it advisable for a healthy male in his early 40s to take the influenza vaccine? | Influenza vaccines do not have satisfactory effective rates of preventing flu. Flu vaccination reduces the risk of flu illness by between 40% and 60% among the overall population during seasons when most circulating flu viruses are well-matched to the flu vaccine, according to the CDC . This is not considered highly ef... | 24 | [
"vaccination",
"influenza",
"mercury"
] | {
"A": "People could develop antibodies from natural exposure to the virus. The vaccine is trying to cause antibodies to exist in more people (and/or more strongly) than would express them naturally, therefore a good comparison group is a sample taken randomly in the same way as those getting the vaccine: a placebo g... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/15061/is-it-advisable-for-a-healthy-male-in-his-early-40s-to-take-the-influenza-vaccin |
law_2163 | law | How is it possible for millions to use pirated software at home and never get arrested? | It's not like talking about using weeds that you tell your friends about but you don't go in public shouting about it. Instead people go to online forums sometimes posting with their real names- bragging about using pirated software. What is exactly stopping the police from having them arrested? | 49 | [
"copyright"
] | {
"A": "You're allowed to make backups of copyrighted software, as long as you are authorized to use the software, the backups are not distributed, and they are destroyed when/if you are no longer authorized to use the software. 17 USC §117(a): (a) Making of Additional Copy or Adaptation by Owner of Copy. -- Notwiths... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/2163/how-is-it-possible-for-millions-to-use-pirated-software-at-home-and-never-get-ar |
engineering_435 | engineering | What makes suspension bridges unsuitable for railways? | I recall reading in an old issue of Model Railroader an article about railroad bridges. In it, the author mentioned that you shouldn't have a model suspension bridge for a railroad track on your layout because no such arrangement would be prototypical. In his own words, "suspension bridges and trains don't mix." I real... | 21 | [
"civil-engineering",
"bridges",
"rail"
] | {
"A": "There are a few main reasons why suspension bridges aren't used for railroads. The main reason is that suspension bridges are typically used where very long spans are needed. Trains are very heavy, especially when compared to lanes of highway traffic. This means that long spans require very strong support str... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/435/what-makes-suspension-bridges-unsuitable-for-railways |
engineering_7080 | engineering | Is it possible for a bicycle chainwheel to have a fractional number of teeth? | Background In the world of bicycle motocross, also known as BMX racing , gearing is a hotly-debated topic. Since the bikes are all single-speed, gear ratio is a fixed number defined as chainwheel / cog (front gear divided by rear gear). Altering your gear ratio is understood as an immediately-noticeable tradeoff betwee... | 47 | [
"mechanical-engineering",
"gears",
"measurements"
] | {
"A": "My first thought is that it might be intended to be a wing nut driver of some sort, but those are usually hollow cylinders with slots for the wings. Ah ... sure enough, it's described as such in this Ebay ad :",
"B": "I suspect that the answer to this is that, ultimately the gear ratio comes from the ratio ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/7080/is-it-possible-for-a-bicycle-chainwheel-to-have-a-fractional-number-of-teeth |
engineering_22848 | engineering | Why are truss bridges the way they are? | Just by taking a train ride across my home city I can see truss bridges like the one in above picture everywhere. There are numerous variations, but the most common design seems to be this. But why are they built specifically this way? I can intuitively kind-of see why such a design probably is strong, but is there any... | 19 | [
"structural-engineering",
"civil-engineering"
] | {
"A": "Those are counterweights . They work exactly the same as those lead counterbalance weights on the wheels of your automobile. If they left those out, then those connecting rods and bearings would create an out-of-balance condition, and the wheels would vibrate at higher speeds. That could very well damage the ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/22848/why-are-truss-bridges-the-way-they-are |
law_596 | law | What legal liability does one's participation on Stack Exchange carry? | This question is motivated by a question which came up recently on engineering.SE: Cracks on the wall . It may be closed in the future so I will summarize. The user posted pictures of (very large) cracks in the wall of his house and asked the community "could you please advice to do continue the construction as per pro... | 40 | [
"internet",
"liability"
] | {
"A": "I imagine that under English and Welsh law, the relevant tort would negligent misstatement, as there is no contract between the parties. From Practical Law : A claim for negligent misstatement may arise whether or not a contractual relationship exists between the parties. However, if there is a contractual re... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/596/what-legal-liability-does-ones-participation-on-stack-exchange-carry |
cybersecurity_202026 | cybersecurity | Does pressing a car remote many times offer denial of service attack for rolling codes? | My understanding of remote car key fobs, and similar security devices with rolling codes, is that the key device is a transmitter that, each time the button is pressed, sends the next secret in a known sequence that is unique to the key. It does not contain a receiver. Meanwhile, the receiver in the car tracks (for eac... | 156 | [
"wireless",
"locks",
"vehicle"
] | {
"A": "No, Docker containers are not more secure than a VM. Quoting Daniel Shapira : In 2017 alone, 434 linux kernel exploits were found , and as you have seen in this post, kernel exploits can be devastating for containerized environments. This is because containers share the same kernel as the host, thus trusting ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/202026/does-pressing-a-car-remote-many-times-offer-denial-of-service-attack-for-rolling |
cybersecurity_49782 | cybersecurity | Is Telegram secure? | There is a new WhatsApp-killer application called Telegram . They said that it's open source and that it has a more secure encryption . But they store all the messages in their servers and WhatsApp doesn't store any messages in any server, only a local copy in the phones. Is Telegram more secure than WhatsApp ? | 245 | [
"encryption",
"cryptography",
"smartphone",
"instant-messaging",
"telegram"
] | {
"A": "It typically works like this: Say your password is \"baseball\". I could simply store it raw, but anyone who gets my database gets the password. So instead I do an SHA1 hash on it, and get this: $ echo -n baseball | sha1sum a2c901c8c6dea98958c219f6f2d038c44dc5d362 Theoretically it's impossible to reverse a SH... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/49782/is-telegram-secure |
law_48515 | law | Who is supposed to teach the law to the citizens? | As I understand, in general, not knowing the law does not excuse violating it . That should apply to most if not all jurisdictions in most cases with very few exceptions . From personal experience, never in my life has school, family or anyone ever actually taught me any laws or showed me where I could consult them mys... | 129 | [
"human-rights",
"legal-concepts"
] | {
"A": "The answer from @user6726 is a good one. But, I'd like to add to it by pointing out that the body of law applicable to an individual is usually much, much smaller than the entire body of law. I'm a lawyer who has been in private practice for almost 25 years with an extremely diverse practice compared to the a... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/48515/who-is-supposed-to-teach-the-law-to-the-citizens |
medicine_1320 | medicine | Why is it so much harder to swallow pills than it is to swallow food? | I don't have any real trouble swallowing pills, and I do it several times a day. But when I try to swallow a pill without food or water in my mouth, it is a bit tricky. We're not talking about huge horse pills either, just regular, relatively small pills. I can swallow a whole raw oyster, which is the size of hundreds ... | 13 | [
"medications"
] | {
"A": "It is not possible. The regulation of human body temperature (thermoregulation) is very subtle. Wikipedia article about thermoregulation contains a very nice graph about that mechanism. The labels are not described in the text in detail and the reference in the caption does not include this picture. Picture i... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/1320/why-is-it-so-much-harder-to-swallow-pills-than-it-is-to-swallow-food |
finance_1685 | finance | Why do high frequency traders use rapidly cancelled limit orders? | In reading about the various practices and strategies of high frequency traders, one of the most mysterious to me is "fleeting orders," or orders that are cancelled almost immediately after they are sent (see Hasbrouck and Saar (2011) ). Why do HFTs use these orders? Some of those trying to explain the practice claim i... | 30 | [
"high-frequency",
"market-making"
] | {
"A": "The lead paper in the January 2011 Journal of Finance ( Hendershott, Jones, and Menkveld ) addresses algorithmic trading (AT). In short, they find that AT improves liquidity as measured by bid-offer spreads. Taking the econometrics as correct (it is in the Journal of Finance) the next question is if bid-offer... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1685/why-do-high-frequency-traders-use-rapidly-cancelled-limit-orders |
cybersecurity_52115 | cybersecurity | Don't understand how my mum's Gmail account was hacked | My mum (on Gmail, using Chrome) received an email from a friend's Hotmail address. She opened the email (very obviously a phishing email) and clicked a link in it. This opened a webpage with loads of medical ads on. She closed the page and deleted the email. She did not notice anything else happen when she clicked the ... | 201 | [
"email",
"phishing"
] | {
"A": "It is not. This is a FUD ( fear, uncertainty, and doubt ) campaign by GMX because they want to display their ads. There is absolutely no security risk from the mentioned ad blockers. They added some crapware to the list to make it look more legitimate. Of course such campaigns are very unusual, especially fro... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/52115/dont-understand-how-my-mums-gmail-account-was-hacked |
engineering_48864 | engineering | How do ball bearings not crack from a load concentrated on an infinitesimally small point? | How do ball bearings last? Most bearings in a standard hub (bottom of the image) are not actually taking a load. Only the single ball that happens to be at a particular location while spinning takes 100% of the load. If the bearings were cylindrical (top of the image) supporting a rolling plate, it would be slightly be... | 25 | [
"stresses",
"bearings"
] | {
"A": "Nothing is rigid, the raceways and the ball in a ball-bearing are no exception. The contact area deflects and accommodates the ball in a small contact surface, not a point. Also, the balls take the load in groups. The digrams are from SKF ball-bearings. '",
"B": "Some ideas: Wheel Load Distribution : The lo... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/48864/how-do-ball-bearings-not-crack-from-a-load-concentrated-on-an-infinitesimally-sm |
medicine_583 | medicine | How effective was the 2014-2015 influenza vaccination? | I’m aware that the CDC released this abysmal report on the effectiveness of this year’s influenza vaccination, including data collected through Jan 30, 2015. In practical terms, this means the flu vaccine reduced a person’s risk of having to seek medical care at a doctor’s office for flu illness by 19%. However, this i... | 12 | [
"vaccination",
"infection",
"influenza"
] | {
"A": "I think a missing bit of information that might help you get a better sense of this practice is: steroids are miracle drugs. OK, that was in jest - no miracles here. Truth be told, though, if there is a single class of drugs that has added more quality-adjusted life-years to human history than any other, ster... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/583/how-effective-was-the-2014-2015-influenza-vaccination |
law_30098 | law | Course of action in a criminal case when there is no conceivable defense | I am not a lawyer or a law student; my work is in mathematics, but I like to learn about criminal law as a hobby. I have spent some time googling and searching to find an answer to my question but have found no results. Here is what I am interested in knowing: Suppose a public defender is assigned a criminal case — let... | 54 | [
"united-states",
"criminal-law"
] | {
"A": "There is precedent for the idea that double jeopardy need not apply when the initial trial was a sham because the judge and/or jury had been bribed. See Aleman v. Judges of Cook County Circuit Court , 138 F.3d 302 (7th Cir. 1998) . This case was very similar to your hypothetical: Aleman was initially acquitte... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/30098/course-of-action-in-a-criminal-case-when-there-is-no-conceivable-defense |
medicine_22937 | medicine | Would the human seasonal coronaviruses be just as deadly as COVID-19 in a population with no prior immunity? | Presuming that we were able to find a person who was never exposed to any of the human seasonal coronaviruses (part of the viruses that cause the common cold), would the virus be just as deadly for that person as the SARS-CoV-2 currently circulating around the world? Or is SARS-CoV-2 uniquely dangerous? | 29 | [
"covid-19",
"infection",
"common-cold",
"coronavirus",
"sars-cov-2"
] | {
"A": "It turns out the answer to this is fairly simple, and but not terribly easy to find. In the 1800s a Belgian named Adolphe Quetelet (1796–1874) performed some statistics on the weights and heights of people in Europe and Britain (chiefly France and Britain) and published his seminal work, Sur l'homme et le dév... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/22937/would-the-human-seasonal-coronaviruses-be-just-as-deadly-as-covid-19-in-a-popula |
cybersecurity_4781 | cybersecurity | Do any security experts recommend bcrypt for password storage? | On the surface bcrypt, an 11 year old security algorithm designed for hashing passwords by Niels Provos and David Mazieres, which is based on the initialization function used in the NIST approved blowfish algorithm seems almost too good to be true. It is not vulnerable to rainbow tables (since creating them is too expe... | 674 | [
"passwords",
"cryptography",
"hash",
"bcrypt"
] | {
"A": "I was one of the implementers of JScript and on the ECMA committee in the mid to late 1990s, so I can provide some historical perspective here. The JavaScript Math.random() function is designed to return a floating point value between 0 and 1. It is widely known (or at least should be) that the output is not ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/4781/do-any-security-experts-recommend-bcrypt-for-password-storage |
engineering_51347 | engineering | Why is this bridge thickest above the support pillars instead of the mid-span where the bending stress is highest? | Why is a bridge designed like this? The depth of the section at pillars is more than the depth at middle. If I model this as a simply supported beam having load at mid span then the bending moment will be maximized at the middle and the area is also less at the middle. So, this will lead to higher bending stress. So, w... | 17 | [
"mechanical-engineering",
"structural-engineering",
"civil-engineering",
"beam",
"bridges"
] | {
"A": "A specific reason for doing this is simply when there isn't enough room to do a bow or stern first launch. This is often the case when a ship or boat is built in a yard on a river or canal either because the hull is especially long or the channel it is being launched into is narrow. There is also the consider... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/51347/why-is-this-bridge-thickest-above-the-support-pillars-instead-of-the-mid-span-wh |
engineering_12984 | engineering | How should I position two shelf supports for the best distribution of load? | I'd like to mount a shelf on the wall. I have two shelf supports to do so, like this: Relative to the shelf, where do I place the (blue) supports to achieve the best distribution of load? | 19 | [
"mechanical-engineering",
"statics"
] | {
"A": "When a reactor is shut down the core produces much less heat, but they do still produce heat through a mechanism known as decay heat . The fact that the core is producing less heat means that the coolant temperature is going to drop, but how far that temperature drops depends on the decay heat generation rate... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/12984/how-should-i-position-two-shelf-supports-for-the-best-distribution-of-load |
medicine_21481 | medicine | Why do corticosteroids harm COVID-19 patients? | This Science Daily article states that steroids could do more harm than good in treating coronavirus (COVID-19), referring to this The Lancet article . Understanding the evidence for harm or benefit from corticosteroids in 2019-nCoV is of immediate clinical importance. It's unclear to me how exactly the use of corticos... | 16 | [
"covid-19",
"asthma",
"virus",
"steroids",
"corticosteroids"
] | {
"A": "One of the primary purposes of corticosteroids is to suppress immune activity and inflammation: that's exactly why they are used in asthma. Of course the immune system has an actual job besides causing nuisance inflammation: fighting infection. For some infections, the harm to the infected person caused by th... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/21481/why-do-corticosteroids-harm-covid-19-patients |
law_3636 | law | Is it illegal to throw away the previous tenant's mail? | Say I move into an apartment. And over the next months and years, I keep receiving mail for the previous tenant, whom I do not know. This is understandably annoying. The easiest and most convenient approach for me is to just throw away his mail – but would I be breaking any law if I did so? | 34 | [
"united-states",
"mail"
] | {
"A": "Trump was an officer of the government, and Twitter wasn't. The First Amendment forbids the government and its agents from viewpoint discrimination, but private companies are not bound by it and can discriminate as much as they please. (There was a question as to whether such discrimination might affect wheth... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/3636/is-it-illegal-to-throw-away-the-previous-tenants-mail |
cybersecurity_103805 | cybersecurity | How do organizations check *what* has been hacked? | In the UK, the company TalkTalk was recently hacked . It was later discovered, after 'investigation' that the hack was not as serious as it could have been (and less than expected). I'm wondering: How do organizations (not necessarily TalkTalk -- that's just what prompted me to ask) check what has been hacked? I'm sure... | 148 | [
"incident-response"
] | {
"A": "Facebook is allowing you to make a handful of mistakes to ease the login process. A Facebook engineer explained the process at a conference . The gist of it is that Facebook will try various permutations of the input you submitted and see if they match the hash they have in their database. For example, if you... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/103805/how-do-organizations-check-what-has-been-hacked |
cybersecurity_137418 | cybersecurity | How does Google know where I am? | Whenever I open the Google Maps app on my Android mobile phone, Google always seems to know my location, and it is very accurate (usually it places me on the map even in the correct room). Also, this happens even if both WiFi adapter and GPS are off. I know WiFi adapter off doesn't really mean anything, and I have hear... | 297 | [
"google",
"geolocation",
"google-apps"
] | {
"A": "I was curious about the same thing, so I put Gbt3fC79ZmMEFUFJ into Google, and lo! and behold it found something that wasn't just a paraphrase of \"Don't use this password\" advice — the password itself was embedded in example source code that showed how you could send a password to a server! ( link to page ,... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/137418/how-does-google-know-where-i-am |
engineering_1864 | engineering | How should the public raise questions about unsafe structures in the United States? | In a program on NPR that I was listening to, there was a bit about a bridge that from the description sounded to a layman as unsound and is still in use. The program described it as an old wooden railway (and I'm aware that has its own set of challenges) bridge with rotting timbers. In the United Sates, if a member of ... | 15 | [
"civil-engineering",
"bridges",
"regulations"
] | {
"A": "I can understand your concern. This is going to be difficult for two reasons: Finding out the agency that is responsible for the maintenance may be next to impossible for a layperson. Note that I said \"maintenance\", because this might be a different entity than the owner due to agreements. Due to the number... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/1864/how-should-the-public-raise-questions-about-unsafe-structures-in-the-united-stat |
cybersecurity_192535 | cybersecurity | Should I let my child's school have access to my kid's personal laptop? | My kid is starting 6th grade and the school requires him to get a laptop and bring it to school. Now the school IT department wants to install some software on the laptop and is asking for administrative access. They want to install Office, Outlook, an AV and some site certificates. I feel that on principle this is not... | 313 | [
"privacy",
"corporate-policy",
"windows-permissions"
] | {
"A": "No, Docker containers are not more secure than a VM. Quoting Daniel Shapira : In 2017 alone, 434 linux kernel exploits were found , and as you have seen in this post, kernel exploits can be devastating for containerized environments. This is because containers share the same kernel as the host, thus trusting ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/192535/should-i-let-my-childs-school-have-access-to-my-kids-personal-laptop |
cybersecurity_191460 | cybersecurity | Why did I have to wave my hand in front of my ID card? | I recently had to authenticate myself online to use an internet-based service. The authentication process was done via video call with me holding my ID card in front of my laptop camera beside my face. I also had to wiggle the ID card so the person on the other end of the video call could see the security features that... | 235 | [
"authentication",
"security-theater"
] | {
"A": "Disclaimer: I am the author, creator, owner and maintainer of Have I Been Pwned and the linked Pwned Passwords service. Let me clarify all the points raised here: The original purpose of HIBP was to enable people to discover where their email address had been exposed in data breaches. That remains the primary... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/191460/why-did-i-have-to-wave-my-hand-in-front-of-my-id-card |
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