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engineering_1880 | engineering | I have inherited a product with inconsistent designs sharing the same part number. What do I do? | I am now in charge of a product line my company has been shipping for a decade. One of the previous product engineers was... shall we say, less than conscientious about sustainability and proper documentation. We have shipped hundreds of units, of multiple design variants, under the exact same part number . The manual ... | 13 | [
"project-management",
"documentation",
"product-support"
] | {
"A": "I don't think there is any formal standard way out of this mess. The good news is that at least tracked the changes by serial number. Inventing different models after fact seems pointless because the customers won't know what models they have. From the customer view, these are all one model but vary by serial... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/1880/i-have-inherited-a-product-with-inconsistent-designs-sharing-the-same-part-numbe |
law_49367 | law | Is it legal to crack MD5 hashes? | I saw a website that involves programming problems. One problem asks to write a program that finds a string whose MD5 hash is given. Is it criminal to crack the MD5 hash by finding those strings? | 36 | [
"software",
"hacking"
] | {
"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/49367/is-it-legal-to-crack-md5-hashes |
cybersecurity_184391 | cybersecurity | Received a set of SMS/MMS containing 2 photos, a voice message, and a text "I need help" with Google Maps link from a known contact. Is it spam? | My girlfriend (let's call her Jane) just got a set of SMS or MMS messages coming from a friend of her (let's call her Hellen). These messages contain: Two photos of Hellen A voice message A text that says "I need help" followed by a Google Maps link. And according to the messaging application, they where sent to 5 peop... | 137 | [
"spam",
"sms"
] | {
"A": "They're probing your site. First, whether the comment will be published. Second, note how they use several popular syntaxes for links - it's an attempt to check which of them will result in an actual HTML link. If your site lets those posts through, expect more spam, this time more malicious.",
"B": "This i... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/184391/received-a-set-of-sms-mms-containing-2-photos-a-voice-message-and-a-text-i-ne |
law_85325 | law | Can I legally include a line break in my child's name? | Ethics aside, is it legal (or even possible) to include a line break (newline) in my child's name? Preferably at the end of the child's first name, directly after the last letter. So instead of (for example) the name "John Doe", the name would always be written out "John Doe". And then when the first name only is writt... | 66 | [
"name",
"birth-certificate"
] | {
"A": "Public nudity is illegal in New York as it is in almost every U.S. jurisdiction. And, if the police had arrested the nude protesters, the arrests probably would have been upheld in court, because a ban on nudity in public would probably be viewed as a time, place and manner restriction on the freedom of speec... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/85325/can-i-legally-include-a-line-break-in-my-childs-name |
law_4559 | law | Why are lawyers typically excluded from juries? | At least in the United States practicing lawyers are called to serve on juries. But my understanding is at least one side will always remove them before trial. Why would it always be the case that at least one side would not want someone with legal training on a jury? | 72 | [
"united-states",
"jury",
"lawyer"
] | {
"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... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/4559/why-are-lawyers-typically-excluded-from-juries |
finance_4160 | finance | Discrete returns versus log returns of assets | There have been similar posts here already but nevertheless I find the question worth posting: why do some people claim that log returns of assets are more suitable for statistics than discrete returns. E.g. in the ESMA CESR guidliens about SSRI log returns are used. I personally think that discrete returns are as good... | 26 | [
"asset-returns",
"log-returns"
] | {
"A": "Arithmetic returns allow for easier cross-sectional aggregation and log returns allow for easier time-aggregation. The reason people use log returns (for equities) is that they are approximately invariant and hence easier to work with in estimating distributions. Meucci does better justice in describing invar... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/4160/discrete-returns-versus-log-returns-of-assets |
law_43175 | law | Is it legal for private citizens to "impound" e-scooters? | This recent article from The Verge claims that two men in San Diego have create a repo company that impounds e-scooters from companies like Lime, Bird, Lyft, Uber and Razor. However as far as I can tell these guys are doing this entirely on their own accord. They don't have a license from the city. They write "tickets"... | 63 | [
"california",
"theft",
"trespass",
"extortion"
] | {
"A": "Your question is the subject of longstanding and ongoing debate that has generated countless articles and books and dissertations, so you're probably not going to get a fully satisfactory answer here. But here's the short version: Different systems operate on different assumptions. Your question suggests you ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/43175/is-it-legal-for-private-citizens-to-impound-e-scooters |
engineering_42598 | engineering | Why not put servers in a refrigerator? | Recently I was thinking about home improvement, and one idea that is haunting me is that I could use some kind of refrigerator for gaming consoles and laptops. The obvious benefit is that it maintains a constant low temperature. Also, the doors usually can be closed firmly and it won't let dust come inside, so there is... | 23 | [
"airflow",
"cooling",
"computer-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 ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/42598/why-not-put-servers-in-a-refrigerator |
cybersecurity_209448 | cybersecurity | GitLab account hacked and repo wiped | I was working on a project, a private repo , and suddenly all the commits disappeared and were replaced with a single text file saying To recover your lost code and avoid leaking it: Send us 0.1 Bitcoin (BTC) to our Bitcoin address 1ES14c7qLb5CYhLMUekctxLgc1FV2Ti9DA and contact us by Email at admin@gitsbackup.com with ... | 171 | [
"account-security",
"ransomware",
"intrusion",
"github"
] | {
"A": "There are a few issues with HTTP Basic Auth: The password is sent over the wire in base64 encoding (which can be easily converted to plaintext). The password is sent repeatedly, for each request. (Larger attack window) The password is cached by the webbrowser, at a minimum for the length of the window / proce... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/209448/gitlab-account-hacked-and-repo-wiped |
medicine_67 | medicine | Are essential oils good disinfectants? | This study seems to indicate that some plant essential oils have antibacterial properties: In vitro antibacterial activity of some plant essential oils (BMC Complementary and Alternative Medicine) Out of 21 essential oils tested, 19 oils showed antibacterial activity against one or more strains. Cinnamon, clove, gerani... | 12 | [
"bacteria",
"essential-oil"
] | {
"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... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/67/are-essential-oils-good-disinfectants |
cybersecurity_106855 | cybersecurity | How should I set up emergency access to business-critical secrets in case I am "hit by a bus"? | I work as the primary developer and IT administrator for a small business. I want to ensure that business can continue even if I suddenly become unavailable for some reason. Much of what I do requires access to a number of servers, (through key-based ssh), cloud services, and other secure infrastructure of applications... | 145 | [
"physical",
"credentials",
"business-risk",
"secret-sharing"
] | {
"A": "Always have your slip with you! This is the golden rule of Red Teaming! If you don't have your Permission to Attack with you, it's like driving without a driver's license. That said, if you are caught during an engagement, I recommend the following: Present a forged Permission to Attack. This way, you can see... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/106855/how-should-i-set-up-emergency-access-to-business-critical-secrets-in-case-i-am |
law_17059 | law | Can illegal aliens claim sanctuary in a church? | This tweet (as quoted in a Washington Post article ), seems to suggest that illegal aliens can claim sanctuary in a church: #GuadalupeGarcia attorney says @ICEgov has lied to him and he will advise future clients to seek sanctuary in churches. (For context, Guadalupe Garcia was living in the US without documentation an... | 47 | [
"united-states",
"police",
"immigration",
"arrest",
"religion"
] | {
"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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/17059/can-illegal-aliens-claim-sanctuary-in-a-church |
medicine_13735 | medicine | Why should I avoid milk when on antibiotics? | I'm taking antibiotics (specifically, amoxicillin clavulanate ) to fight off an ear infection. As she prescribed my antibiotics, my doctor told me not to eat milk products for a few days, then only eat yogurt until I was off the antibiotics altogether. To be honest, I'm thinking about ignoring this advice and just redu... | 27 | [
"medications",
"gastroenterology",
"antibiotics",
"milk",
"gut-microbiota-flora"
] | {
"A": "Overall, there has been inconsistent data on the effects of using zinc lozenges to treat the common cold. Most studies have also been done on children, which may lead to more uncertainty about its effects on adults, but some of the studies I will mention have been tested on adults. One study showed the effect... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/13735/why-should-i-avoid-milk-when-on-antibiotics |
finance_545 | finance | How useful is the genetic algorithm for financial market forecasting? | There is a large body of literature on the "success" of the application of evolutionary algorithms in general, and the genetic algorithm in particular, to the financial markets. However, I feel uncomfortable whenever reading this literature. Genetic algorithms can over-fit the existing data. With so many combinations, ... | 59 | [
"quant-trading-strategies",
"forecasting",
"algorithm"
] | {
"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... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/545/how-useful-is-the-genetic-algorithm-for-financial-market-forecasting |
cybersecurity_18556 | cybersecurity | How do ASLR and DEP work? | How do Address Space Layout Randomisation (ASLR) and Data Execution Prevention (DEP) work, in terms of preventing vulnerabilities from being exploited? Can they be bypassed? | 130 | [
"exploit",
"aslr",
"dep",
"shellcode"
] | {
"A": "Address Space Layout Randomisation (ASLR) is a technology used to help prevent shellcode from being successful. It does this by randomly offsetting the location of modules and certain in-memory structures. Data Execution Prevention (DEP) prevents certain memory sectors, e.g. the stack, from being executed. Wh... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/18556/how-do-aslr-and-dep-work |
finance_3934 | finance | Portfolio optimisation with VaR or CVaR constraints using linear programming | I would like to optimize a portfolio allocation (maximizing the exposure or the expected return), but with VaR or CVaR contraints. (some parts of my portfolio cannot exceed a certain VaR) How can I achieve that? Is there a way to turn the problem into a linear programming problem? or to approximate the results? Any lin... | 23 | [
"portfolio-management",
"portfolio-optimization",
"optimization",
"value-at-risk"
] | {
"A": "In my experience, a VaR or CVaR portfolio optimization problem is usually best specified as minimizing the VaR or CVaR and then using a constraint for the expected return. As noted by Alexey, it is much better to use CVaR than VaR. The main benefit of a CVaR optimization is that it can be implemented as a lin... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/3934/portfolio-optimisation-with-var-or-cvar-constraints-using-linear-programming |
law_36546 | law | Why would someone get a fine when using a disabled parking space when the disabled person is not in the car? | An article in LA Times about someone parking on a disabled parking space without the disabled person being in the car: (...) I saw a woman pull into a disabled parking space and begin to exit her car. Two men in plain clothes flashed badges as they approached the car. One of them asked to see the registration slip that... | 36 | [
"united-states",
"driving",
"france",
"disabilities"
] | {
"A": "There isn't any indication in that news story that the disabled son was anywhere nearby. I agree the situation you describe sounds like a legitimate use of the placard, but it seems in this situation, the placard was being used in a manner totally unrelated to the transport of a disabled person. My guess is t... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/36546/why-would-someone-get-a-fine-when-using-a-disabled-parking-space-when-the-disabl |
medicine_435 | medicine | Does the usage of sunscreen cause skin cancer? | I have heard that usage of sunscreen products causes skin cancer. Is this true, and if so, what are the ingredients in it that are reason for such a medical condition. Are there any safe products or methods of application that they don't harm skin. | 14 | [
"dermatology",
"cancer"
] | {
"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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/435/does-the-usage-of-sunscreen-cause-skin-cancer |
law_60445 | law | If I'm the CEO and largest shareholder of a public company, would taking anything from my office be considered as a theft? | To summarize it, I'll give an example: I'm Bill Gates. I own Microsoft. On a desk, there's a Microsoft Surface that is branded by my company. I decide to take it home and never bring it back, although I didn't buy it personally, and the company's budget was spent on it. Would that be a theft? | 44 | [
"united-states",
"business",
"property"
] | {
"A": "Yes. Let's assume this anecdote takes place while Gates was CEO. Bill Gates doesn't own all of Microsoft, and as an officer of the company, he owes a fiduciary duty to act in the best interests of the company and its shareholders as a whole. Taking the company's property for personal use breaches that fiducia... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/60445/if-im-the-ceo-and-largest-shareholder-of-a-public-company-would-taking-anythin |
finance_219 | finance | What is the intuition behind cointegration? | What is the intuition behind cointegration? What does the Dickey-Fuller test do to test for it? Ideally, a non-technical explanation would be appreciated. Say you need to explain it to an investor and justify why your pairs trading strategy should make him rich! | 32 | [
"time-series",
"statistics",
"cointegration",
"intuition"
] | {
"A": "This isn't really an answer, but it's too long to add as a comment. I've always had a real problem with the correlation/covariance of price . To me, it means nothing. I realize that it gets used (abused) in many contexts, but I just don't get anything out of it (over time, price has to generally go up, go dow... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/219/what-is-the-intuition-behind-cointegration |
finance_2303 | finance | What does the VIX formula measure and how does it work? | I have read the CBOE's white paper on the VIX and a lot of other things, but I need to honestly say, I don't really get it, or I am missing something important. In semi-layman's terms, is the VIX simply the a measurement of the volume of protective options bought? That is, individual contract volatility increases when ... | 27 | [
"options",
"volatility",
"implied-volatility",
"vix"
] | {
"A": "VIX is a measure of implied volatility , specifically, model-free implied volatility , a concept originally developed by Demeterfi et. al. at Goldman Sachs in the 1990s . One of my recent questions, How to extrapolate implied volatility for out of the money options? , addressed some aspects of MFIV, and the p... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/2303/what-does-the-vix-formula-measure-and-how-does-it-work |
engineering_46922 | engineering | Why do heavy trucks use air brakes? | I was having a discussion today, which led to the question why do heavy trucks still use air brakes? To my knowledge, it has been used for at least 40 years (I remember that as a kid), and apparently (I was told today but I haven't gotten around to verify it) they are still widely used. From what I remember, one of the... | 18 | [
"mechanical-engineering",
"automotive-engineering",
"braking"
] | {
"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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/46922/why-do-heavy-trucks-use-air-brakes |
cybersecurity_40050 | cybersecurity | Best Practice: ”separate ssh-key per host and user“ vs. ”one ssh-key for all hosts“ | Is it better to create a separate SSH key for each host and user or just using the id_rsa key for all hosts to authenticate? Could one id_rsa be malpractice for the privacy/anonymity policies? having one ssh-key for all hosts: ~/.ssh/id_rsa ~/.ssh/id_rsa.pub in comparison to separate ssh-keys: ~/.ssh/user1_host1 ~/.ssh... | 240 | [
"privacy",
"ssh",
"key-management",
"anonymity",
"key-generation"
] | {
"A": "From what I heard earlier today, https/ssl flows correctly through your borders. You should hence check out Corkscrew . Similarly to netcat , it's used to wrap ssh in https to allow the use of https proxies. Another solution would be to use LSH which, by having a different signature than ssh, works from Iran ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/40050/best-practice-separate-ssh-key-per-host-and-user-vs-one-ssh-key-for-all-hos |
finance_3368 | finance | Why is an inverted yield curve a problem? | Immediately preceding the worst of the financial crisis, my professors all pointed out to me that the yield curve had inverted -- short-term yields were more risky than 20-year or 30-year Treasury securities. My professors all seemed nervous about this. Aside from such a situation being generally counter-intuitive, why... | 28 | [
"theory",
"yield-curve"
] | {
"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/3368/why-is-an-inverted-yield-curve-a-problem |
cybersecurity_3936 | cybersecurity | Is a rand from /dev/urandom secure for a login key? | Lets say I want to create a cookie for a user. Would simply generating a 1024 bit string by using /dev/urandom , and checking if it already exists (looping until I get a unique one) suffice? Should I be generating the key based on something else? Is this prone to an exploit somehow? | 221 | [
"cryptography",
"web-application",
"authentication",
"linux",
"random"
] | {
"A": "The short answer is yes. The long answer is also yes. /dev/urandom yields data which is indistinguishable from true randomness, given existing technology. Getting \"better\" randomness than what /dev/urandom provides is meaningless, unless you are using one of the few \"information theoretic\" cryptographic a... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/3936/is-a-rand-from-dev-urandom-secure-for-a-login-key |
cybersecurity_24195 | cybersecurity | How do you explain the necessity of "nuke it from orbit" to management and users? | When a machine has been infected with malware, most of us here immediately identify the appropriate action as "nuke it from orbit" - i.e. wipe the system and start over. Unfortunately, this is often costly for a company, especially if backups are configured in a less-than-optimal fashion. This can produce resistance fr... | 167 | [
"malware",
"antivirus",
"risk-management",
"user-education",
"system-compromise"
] | {
"A": "WannaCry attacks are initiated using an SMBv1 remote code execution vulnerability in Microsoft Windows OS. The EternalBlue exploit has been patched by Microsoft on March 14 and made publicly available through the \"Shadowbrokers dump\" on April 14th, 2017. However, many companies and public organizations have... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/24195/how-do-you-explain-the-necessity-of-nuke-it-from-orbit-to-management-and-users |
cybersecurity_131106 | cybersecurity | Is there any reason to disable paste password on login? | Today I logged in to pay my cellphone bill, and I found that the site has disabled paste functionality in password field. I'm a webdev and I know how to fix this, but for regular user is REALLY annoying having to type a random password like o\&$t~0WE'kL . I know that is normal to make users write the password when crea... | 238 | [
"passwords",
"web-application",
"password-management"
] | {
"A": "As a starting point, we will consider that each elementary operation implies a minimal expense of energy; Landauer's principle sets that limit at 0.0178 eV, which is 2.85×10 -21 J. On the other hand, the total mass of the Solar system, if converted in its entirety to energy, would yield about 1.8×10 47 J (act... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/131106/is-there-any-reason-to-disable-paste-password-on-login |
finance_1937 | finance | How to identify technical analysis chart patterns algorithmically? | I'm working on a small application that will provide some charts and graphs to be used for technical analysis. I'm new to TA but I'm wondering if there is a way to algorithmically identify the formation of certain patterns. In most of the TA literature I've read the authors explain how to identify these patterns visual... | 36 | [
"algorithm",
"technicals",
"indicator"
] | {
"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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1937/how-to-identify-technical-analysis-chart-patterns-algorithmically |
finance_955 | finance | Separating the wheat from the chaff: What quant methods separate skillful managers from lucky ones? | Fund managers are acting in a highly stochastic environment. What methods do you know to systematically separate skillful fund managers from those that were just lucky? Every idea, reference, paper is welcome! Thank you! | 30 | [
"performance-evaluation"
] | {
"A": "Larry Harris has a chapter on performance evaluation in Trading and Exchanges . He states that over a long period of time, a skilled asset manager will consistently have excess returns whereas a lucky one will be expected to have random and unpredictable returns. Thus, we start with the portfolio's market-adj... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/955/separating-the-wheat-from-the-chaff-what-quant-methods-separate-skillful-manage |
engineering_2133 | engineering | If the emergency brake in a train is broken, do the passenger car brakes still work? | Scenario: Suppose the emergency brake button in the cab of a train is not working. Would the emergency brake cords / buttons in the passenger cars still work? This question is inspired by this question on the SciFi StackExchange , asking why the passengers in the train fight scene from the movie SpiderMan 2 did not sim... | 14 | [
"mechanical-engineering",
"rail"
] | {
"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... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/2133/if-the-emergency-brake-in-a-train-is-broken-do-the-passenger-car-brakes-still-w |
law_53442 | law | Suppose someone kills more people than they intended. Did they murder the extra people? | If a person sets a bomb in a music festival. Based on previous attendance numbers, they expected 60,000 people to show up. 120,000 people showed up and were killed by their bomb. Legally, did they murder 60,000 people, or all 120,000? Also, suppose they set up the bomb just to kill the production crew, and they end up ... | 40 | [
"criminal-law",
"california",
"murder"
] | {
"A": "An essential component of your contract with them is that they will provide you with food free of animal stuff (the exact nature of \"vegan approved\" may be up for debate, but actual meat should not be included). So they breached their contract with you, and you might sue them for breach of contract. The cas... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/53442/suppose-someone-kills-more-people-than-they-intended-did-they-murder-the-extra |
medicine_20970 | medicine | Does COVID-19 have a case fatality rate of 41%? Is this formula correct? | According to the data on the Johns Hopkins Coronavirus Tracker , as of 3rd February 2020 there were 17491 confirmed cases of COVID-19 globally, 536 total recoveries and 362 deaths. From my non-expert calculation this implies a mortality rate of: (Nd / (Nd + Nr)) * 100 = 41% where: Nd is the total number of deaths, Nr i... | 35 | [
"virus",
"infectious-diseases",
"death",
"covid-19"
] | {
"A": "This event occurred in the US. In the US, enzootic (dog-to-dog) canine rabies virus has been virtually eliminated through vaccination and stray control programs, making wild animals the primary concern. It is quite true, as @EMT_Jedi stated, that rabies is usually caused by an animal's saliva, usually introdu... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/20970/does-covid-19-have-a-case-fatality-rate-of-41-is-this-formula-correct |
medicine_23323 | medicine | A cheap and easy inactivated vaccine for COVID-19 | Suppose a person with COVID-19 coughs into a bag. Let the bag sit in the sun for, say, 72 hours -- so as to make the virus inactive . Could a healthy person breathe in the inactivated virus from the bag (perhaps done multiple times) to (eventually) trigger an antibody response to the virus? Is this a known way to make ... | 14 | [
"covid-19",
"virus",
"vaccination",
"infectious-diseases",
"antibodies"
] | {
"A": "The only approved inhaled vaccine is the flu vaccine delivered intra-nasally. It uses a live attenuated virus. There are a whole list of people who should not receive it because it's a live virus, and it works better for children, but only is 40% effective for adults. The main issue is The intranasal LAIV, re... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/23323/a-cheap-and-easy-inactivated-vaccine-for-covid-19 |
engineering_63 | engineering | What are the pros and cons of a traffic circle versus a traffic light intersection? | The debate of traffic circles (also called roundabouts or rotaries) versus traffic light intersections has been in progress for a while. Those in favor of traffic circles say that , among other things, that they are safer than traffic light intersections. This claim has been scientifically proven. On the other hand, tr... | 36 | [
"traffic-light",
"highway-engineering"
] | {
"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)... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/63/what-are-the-pros-and-cons-of-a-traffic-circle-versus-a-traffic-light-intersecti |
engineering_15798 | engineering | What's wrong with transporting a refrigerator on its side? | I tried to deliver a refrigerator and the customer saw that the refrigerator was lying down in the truck instead of standing up. He refused to accept it, claiming that the compressor would be damaged by having it on its side. I tried to explain that that made no sense, but his friend came to me and also said the same t... | 22 | [
"refrigeration"
] | {
"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... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/15798/whats-wrong-with-transporting-a-refrigerator-on-its-side |
engineering_19758 | engineering | Transmitting power over long distances what is better AC or DC? | I found this answer to a related question. The part of the answer that's confusing me is: Transmitting DC power over a long distance is inefficient. Thus AC supply is a far more efficient to transmit power. According to Siemens it's quite the opposite : Whenever power has to be transmitted over long distances, DC trans... | 43 | [
"power-transmission"
] | {
"A": "I'm going to set aside the potential legal liability aspects of your question. In part because you didn't ask about them, but also because liability will vary based upon jurisdiction. Obviously, consult an attorney familiar with the relevant law. Ethically, I think you've done everything that you're obligated... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/19758/transmitting-power-over-long-distances-what-is-better-ac-or-dc |
medicine_30864 | medicine | Why is BMI related to the square of height? | I'm aware that the U.S. CDC defines BMI (Body Mass Index) as mass (in kg) divided by height squared (in meters squared.) The CDC then defines what ranges are considered underweight, healthy, or overweight broadly based on BMI (with different ranges by gender.) My question is: Why the square ? As any mechanical or civil... | 15 | [
"anatomy",
"body-mass-index-bmi"
] | {
"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 ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/30864/why-is-bmi-related-to-the-square-of-height |
engineering_44701 | engineering | Why exactly does a washer help distribute the stress around a bolt? | Usually the reason for having a washer under a bolt head is stated to be that it helps to evenly distribute the stress to the clamped material surface. But why is this? I would understand if the washer was significantly larger than the bolt head. Then there would understandably be more surface area. But for a bolt like... | 24 | [
"mechanical-engineering",
"civil-engineering",
"stresses",
"fasteners",
"machine-elements"
] | {
"A": "Car wheels have holes mostly due to weight and cost considerations. Each hole is a chunk of material that you aren't wasting and weighing down the wheel with. As another bonus, the holes help with cooling the brakes by allowing airflow between the inside and outside. The shape and size of the holes are calcul... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/44701/why-exactly-does-a-washer-help-distribute-the-stress-around-a-bolt |
finance_2332 | finance | How to combine multiple trading algorithms? | Is it possible to combine different algorithms so as to improve trading performance? In particular, I have read that social media sentiment tracking, digital signal processing and neural networks all can be used for trading algorithms. Would it be possible to create a trading algorithm that combines elements from these... | 23 | [
"trading",
"algorithmic-trading",
"quant-trading-strategies",
"performance"
] | {
"A": "In order to answer your question (for you) you would need something to compare to . You would need numbers to know if it is slower/faster, how much, and if it will impact your system overall. Also knowing your performance goals could narrow down the options. My advice is to take a look at your overall archite... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/2332/how-to-combine-multiple-trading-algorithms |
cybersecurity_18666 | cybersecurity | Is there any technical security reason not to buy the cheapest SSL certificate you can find? | While shopping for a basic SSL cert for my blog, I found that many of the more well-known Certificate Authorities have an entry-level certificate (with less stringent validation of the purchaser's identity) for approximately $120 and up. But then I found that Network Solutions offers one of these lower-end certs for $2... | 144 | [
"encryption",
"tls",
"certificates",
"certificate-authority",
"trust"
] | {
"A": "For the purposes of this discussion there are only a couple differences between web signing certificates: Extended vs standard validation (green bar). Number of bits in a certificate request (1024/2048/4096). Certificate chain. It is easier to set up certificates with a shorter trust chain but there are inexp... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/18666/is-there-any-technical-security-reason-not-to-buy-the-cheapest-ssl-certificate-y |
finance_946 | finance | What type of investor is willing to be short gamma? | As far as I understand, most investors are willing to buy options (puts and calls) in order to limit their exposure to the market in case it moves against them. This is due to the fact that they are long gamma. Being short gamma would mean that the exposure to the underlying becomes more long as the underlying price dr... | 38 | [
"options",
"hedging",
"portfolio-management",
"greeks",
"investing"
] | {
"A": "Here couple pointers that may make it clearer: Drift can be replaced by the risk-free rate through a mathematical construct called risk-neutral probability pricing. Why can we get away with that without introducing errors? The reason lies in the ability to setup a hedge portfolio, thus the market will not com... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/946/what-type-of-investor-is-willing-to-be-short-gamma |
cybersecurity_169642 | cybersecurity | Is Docker more secure than VMs or bare metal? | I recently had a discussion with a Docker expert about the security of Docker vs. virtual machines. When I told that I've read from different sources that it's easier for code running within a Docker container to escape from it than for a code running in a virtual machine, the expert explained that I'm completely wrong... | 313 | [
"virtualization",
"docker",
"isolation"
] | {
"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 ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/169642/is-docker-more-secure-than-vms-or-bare-metal |
law_53481 | law | Why is murder considered a more serious crime than attempted murder? | By its sentencing guidelines (the world over?), murder is considered a more serious crime than attempted murder. If intent to kill has indeed been proven, does the latter crime reward incompetence with leniency? Shouldn’t the incarceration of such a criminal be intended to either rehabilitate them, or to protect the pu... | 73 | [
"criminal-law",
"murder",
"sentencing",
"comparative-law",
"theory-of-law"
] | {
"A": "Your question is the subject of longstanding and ongoing debate that has generated countless articles and books and dissertations, so you're probably not going to get a fully satisfactory answer here. But here's the short version: Different systems operate on different assumptions. Your question suggests you ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/53481/why-is-murder-considered-a-more-serious-crime-than-attempted-murder |
law_90806 | law | Do the Ohio sheriffs suing Afroman have any legal standing in their claim of "invasion of privacy and misappropriation of their likenesses" lawsuit? | From this article “Afroman Sued by Sheriffs for Allegedly Profiting from Raid on his Home . Afroman is reportedly being sued by a number of Ohio sheriff deputies for allegedly profiting off the raid they conducted on his home last summer. The Adams County Sheriff’s Department ran up on Afroman’s home last August, where... | 39 | [
"united-states",
"privacy",
"first-amendment",
"ohio",
"right-of-publicity"
] | {
"A": "The deputies have standing, but they're probably going to lose. \"Standing\" is just a legal principle that limits the legal process to people who have suffered certain types of injuries. Jen's answer offers a good explanation of why the answer is yes, they do have standing. But I assume you're less intereste... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/90806/do-the-ohio-sheriffs-suing-afroman-have-any-legal-standing-in-their-claim-of-in |
engineering_38991 | engineering | Why are engine blocks so robust apart from containing high pressure? | Lately, I've been pondering why some engine blocks are so bulky, I always thought intuitively it was because they had to last a long time whilst containing thousands of combustion cycles but the more, I look into the reality of engine design that understanding doesn't always hold up to the design of an engine. It seems... | 27 | [
"mechanical-engineering",
"structural-engineering",
"structural-analysis",
"automotive-engineering",
"vibration"
] | {
"A": "If you were going to turn left 90 degrees, without turning the wheels, then you wind up dragging the wheels sideways while you turn. 16 seconds into this video shows exactly what I'm talking about . So every time you try to back out of your driveway, or a parking spot, or turn into a parking spot, or turn any... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/38991/why-are-engine-blocks-so-robust-apart-from-containing-high-pressure |
medicine_1263 | medicine | Safety of using a luggage with the prop. 65 warning | I recently bought a luggage set from Nautica and it came with a "California 65 warning: This product contains chemicals known to the state of California to cause cancer and/or birth defects or other reproductive harm." Is it safe to use? I won't "eat" the luggage or anything similar, but is it possible to be affected j... | 13 | [
"cancer"
] | {
"A": "There is evidence that neonatal circumcision saying that the benefits of circumcision outweigh the risks. According to a study done on neonatal circumcision [1] , the lifetime benefits of being circumcised outweighed the risks 100 to 1. Some of the risks people may associate with circumcision are very unlikel... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/1263/safety-of-using-a-luggage-with-the-prop-65-warning |
medicine_874 | medicine | How do I know if I'm flossing correctly? | I recently started flossing regularly. However, I'm not sure if I'm doing it right because sometimes my gums bleed. If I floss the right way, should it never bleed? Aside from bleeding, how can I know if flossing makes a positive effect? What should I notice in 2 weeks time? How about 4 weeks? 3 months? 1 year? | 22 | [
"dentistry"
] | {
"A": "There is evidence that neonatal circumcision saying that the benefits of circumcision outweigh the risks. According to a study done on neonatal circumcision [1] , the lifetime benefits of being circumcised outweighed the risks 100 to 1. Some of the risks people may associate with circumcision are very unlikel... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/874/how-do-i-know-if-im-flossing-correctly |
finance_25942 | finance | Why aren't econometric models used more in Quant Finance? | There is a big body of literature on econometric models like ARIMA , ARIMAX or VAR . Yet to the best of my knowledge practically nobody is making use of that in Quantitative Finance. Yes, there is a paper here and there and sometimes you find an example where stock prices are being used for illustrative purposes but th... | 41 | [
"modeling",
"forecasting",
"econometrics",
"models",
"arima"
] | {
"A": "Because of: The (extreme) dominance of noise over signal The prevalence of non-repeating patterns (many of which we know are not going to repeat) A pathetic sample size for cross-validation Regime changes due to exogenous events. These are typically in the cross-val window which makes it even worse. (GFC, fin... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/25942/why-arent-econometric-models-used-more-in-quant-finance |
cybersecurity_57909 | cybersecurity | Why would you not permit Q or Z in passwords? | Jetblue's password requirements specify that, among other stringent requirements: Cannot contain a Q or Z I can't fathom a logical reason for this, unless it were say, extremely common for the left side of keyboards to break, but then you wouldn't allow 'A' either :) What would be the reason for this security requireme... | 232 | [
"passwords",
"password-policy"
] | {
"A": "It's a leftover from the time when keypads didn't have the letters Q and Z . Security-wise, there's no reason. It's just because of old systems. To clarify: You used to be able to enter your password over the phone. Some phones didn't have the letters Q or Z, like the one on the picture below. Image courtesy:... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/57909/why-would-you-not-permit-q-or-z-in-passwords |
engineering_1903 | engineering | What happens when you put the wrong type of fuel in an internal combustion engine? | What happens to the working of petrol engine when it is emptied and filled with diesel or to a diesel engine emptied and filled with petrol? Will the engine be able to operate and, if not, why not? | 14 | [
"mechanical-engineering",
"automotive-engineering",
"combustion"
] | {
"A": "If you were going to turn left 90 degrees, without turning the wheels, then you wind up dragging the wheels sideways while you turn. 16 seconds into this video shows exactly what I'm talking about . So every time you try to back out of your driveway, or a parking spot, or turn into a parking spot, or turn any... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/1903/what-happens-when-you-put-the-wrong-type-of-fuel-in-an-internal-combustion-engin |
cybersecurity_68122 | cybersecurity | What is a specific example of how the Shellshock Bash bug could be exploited? | I read some articles ( article1 , article2 , article3 , article4 ) about the Shellshock Bash bug ( CVE-2014-6271 reported Sep 24, 2014) and have a general idea of what the vulnerability is and how it could be exploited. To better understand the implications of the bug, what would be a simple and specific example of an ... | 213 | [
"linux",
"exploit",
"known-vulnerabilities",
"bash",
"shellshock"
] | {
"A": "It is the magic of public-key cryptography . Mathematics are involved. The asymmetric key exchange scheme which is easiest to understand is asymmetric encryption with RSA. Here is an oversimplified description: Let n be a big integer (say 300 digits); n is chosen such that it is a product of two prime numbers... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/68122/what-is-a-specific-example-of-how-the-shellshock-bash-bug-could-be-exploited |
law_28856 | law | Is requesting waiving the right to deletion of contributions against GDPR? | I just got one of those GDPR mails from gitlab.com, which pointed me to a Web page where I had to accept some terms and conditions. The same as everywhere, except this passage: (For GitLab Contributors Only) As part of my voluntary contribution to any GitLab project, I acknowledge and agree that my name and email addre... | 51 | [
"privacy",
"gdpr"
] | {
"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/28856/is-requesting-waiving-the-right-to-deletion-of-contributions-against-gdpr |
finance_3667 | finance | Skewness and Kurtosis under aggregation | Returns possess non-zero skewness and excess kurtosis. If these assets are temporally aggregated both will disappear due to the law of large numbers. To be exact, if we assume IID returns skewness scales with $\frac{1}{\sqrt{n}}$ and kurtosis with $\frac{1}{n}$. I'm interested in a concise, clear and openly accessible ... | 23 | [
"statistics",
"returns",
"volatility-skew",
"kurtosis"
] | {
"A": "Just to be painfully clear, it only seems to make sense to consider the logarithm of returns, i.e. $X=\\log (1+\\frac r{100})$ for a simple return of $r\\%$ in an arbitrary period because this is what sums when returns are temporally aggregated. A basic property of cumulants is that cumulants of all orders ar... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/3667/skewness-and-kurtosis-under-aggregation |
cybersecurity_20706 | cybersecurity | What is the difference between authorized_keys and known_hosts file for SSH? | I am learning the basics of SSH protocol. I am confused between the contents of the following 2 files: ~/.ssh/authorized_keys : Holds a list of authorized public keys for servers. When the client connects to a server, the server authenticates the client by checking its signed public key stored within this file ~/.ssh/k... | 260 | [
"authentication",
"linux",
"ssh"
] | {
"A": "If you hash on the client side, the hashed password becomes the actual password (with the hashing algorithm being nothing more than a means to convert a user-held mnemonic to the actual password). This means that you will be storing the full \"plain-text\" password (the hash) in the database, and you will hav... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/20706/what-is-the-difference-between-authorized-keys-and-known-hosts-file-for-ssh |
finance_4589 | finance | How to simulate stock prices with a Geometric Brownian Motion? | I want to simulate stock price paths with different stochastic processes. I started with the famous geometric brownian motion. I simulated the values with the following formula: $$R_i=\frac{S_{i+1}-S_i}{S_i}=\mu \Delta t + \sigma \varphi \sqrt{\Delta t}$$ with: $\mu= $ sample mean $\sigma= $ sample volatility $\Delta t... | 36 | [
"equities",
"simulations",
"stochastic-processes",
"brownian-motion"
] | {
"A": "I know that I have seen things like this in the past. Wasn't there something recently that used Twitter? Here are a few recent papers as examples, although I will be brutally honest that I don't know if they speak to your decent quality requirement: \"Trading Strategies to Exploit Blog and News Sentiment\" (Z... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/4589/how-to-simulate-stock-prices-with-a-geometric-brownian-motion |
finance_14 | finance | What is the "delta" option quoting convention about? | At my work I often see option prices or vols quoted against deltas rather than against strikes. For example for March 2013 Zinc options I might see 5 quotes available for deltas as follows: ZINC MARCH 2013 OPTION DELTA -10 POINTS ZINC MARCH 2013 OPTION DELTA -25 POINTS ZINC MARCH 2013 OPTION DELTA +10 POINTS ZINC MARCH... | 23 | [
"options",
"greeks"
] | {
"A": "Delta is the partial derivative of the value of the option with respect to the value of the underlying asset. An option with a delta of 0.5 (here listed as +50 points) goes up \\$0.50 if the underlying asset goes up \\$1.00. Or goes down \\$0.50 if the underlying asset goes down \\$1.00. Keep in mind that del... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/14/what-is-the-delta-option-quoting-convention-about |
engineering_1706 | engineering | Does a roadway bridge experience more load when vehicles are parked or when they are moving? | Bridges are designed for the loads that come from the vehicles that are expected to cross them. This includes the weight the vehicle and any dynamic loads that may be introduced from movement of the vehicle. Dynamic loads may be from "bouncing" or from hitting a joint or pothole. Initially it would seem obvious that mo... | 20 | [
"civil-engineering",
"bridges",
"structural-engineering"
] | {
"A": "Electricity production optimization is a very complex subject. It is also affected by many parameters , which I will try to outline below. TL;DR: Demand is constantly monitored and supply is constantly adjusted TL;DR 2: Lshaver's excellent post is a suggested reading after reading this, because it expands and... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/1706/does-a-roadway-bridge-experience-more-load-when-vehicles-are-parked-or-when-they |
law_71149 | law | HOA Prohibits "Large Families" | My wife and I have found a vacant lot (this is in Utah, BTW) where we would like to build a house. However, the HOA that the lot belongs to does not allow more than four occupants, regardless of the size of the home. The CCR actually says (community name) is designed and intended to be for a specific lifestyle. Neither... | 59 | [
"real-estate",
"hoa",
"utah",
"fair-housing-acts"
] | {
"A": "Your question is the subject of longstanding and ongoing debate that has generated countless articles and books and dissertations, so you're probably not going to get a fully satisfactory answer here. But here's the short version: Different systems operate on different assumptions. Your question suggests you ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/71149/hoa-prohibits-large-families |
finance_1027 | finance | How are correlation and cointegration related? | In what ways (and under what circumstances) are correlation and cointegration related, if at all? One difference is that one usually thinks of correlation in terms of returns and cointegration in terms of price. Another issue is the different measures of correlation (Pearson, Spearman, distance/Brownian) and cointegrat... | 64 | [
"time-series",
"statistics",
"correlation",
"cointegration"
] | {
"A": "This isn't really an answer, but it's too long to add as a comment. I've always had a real problem with the correlation/covariance of price . To me, it means nothing. I realize that it gets used (abused) in many contexts, but I just don't get anything out of it (over time, price has to generally go up, go dow... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1027/how-are-correlation-and-cointegration-related |
medicine_23059 | medicine | If a SARS-CoV-2 asymptomatic infected individual is exposed to a high viral load, could they develop COVID-19 disease? | I would add my own research if I could to respect site rules, but I can't. There are no studies on SARS-CoV-2, all I can find is for SARS-CoV-1 and some Chinese information based studies. My government is planning to do massive testing (when tests are available) and transfer and isolate every asymptomatic person in bui... | 14 | [
"covid-19",
"infection",
"virus",
"infectious-diseases",
"sars-cov-2"
] | {
"A": "What your government is proposing is a lot less than what was actually done in China. There, and perhaps that is still the case, large numbers of asymptomatic infected people were housed together in halls with only social separation between them, and masks to prevent others from infecting others. Your governm... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/23059/if-a-sars-cov-2-asymptomatic-infected-individual-is-exposed-to-a-high-viral-load |
law_56782 | law | Is it a crime to take my own package from a delivery truck before it has reached my home? | Not that I would ever do this, but I'm curious: if I were to go into a stopped delivery truck and remove from it an item that is addressed to me, would this be a crime? If so what crime would it be? It seems to me that I would not be stealing anything since it's my own property that I'm taking. I might even have a reas... | 42 | [
"united-states",
"property",
"postal-service"
] | {
"A": "There is a history of \"giving away patents\", which allows the original grantor to foster innovation instead of stifle it. Here are some examples: Sealand Industries - ISO Shipping Container Patented the standard shipping container, then gave away the patent royalty free, allowing a revolution in ocean going... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/56782/is-it-a-crime-to-take-my-own-package-from-a-delivery-truck-before-it-has-reached |
law_78272 | law | Legality of penalising Russian Oligarchs | What is the legal basis for penalising individual Russian Oligarchs? Having ill-gotten wealth and dubious friends is hardly unique to Russia, and whilst I can understand with the desire of the Western / European powers to been seen to be doing something I can't see the legal basis of confiscating their assets. If they ... | 39 | [
"united-kingdom",
"european-union"
] | {
"A": "In the UK Armed Forces, conscientious objection is grounds for a refusal at the admission stage and has been since the end of conscription in 1963. Where a person develops an objection to military service during their term of service, they have the option to appeal for a discharge. Interestingly there's no pr... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/78272/legality-of-penalising-russian-oligarchs |
cybersecurity_143599 | cybersecurity | Can someone take down Wi-Fi signal? | Is it possible that someone made an attack (DoS or something else) to my Wi-Fi router (without knowing of the password) and make my router's signal unavailable? 1) How it can be done? 2) What are remedies? | 153 | [
"wifi",
"denial-of-service"
] | {
"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/143599/can-someone-take-down-wi-fi-signal |
law_92750 | law | Why did this US prosecutor keep asking whether documents would refresh a witness's memory? | Background I served on a jury during a criminal trial in the United States several years ago. There was a strangely formal interaction that repeated itself a few times during the trial. The prosecutor, while holding some document, would ask a question which required the witness to recall some specific detail. The witne... | 40 | [
"united-states",
"court",
"criminal-procedure"
] | {
"A": "Your question is the subject of longstanding and ongoing debate that has generated countless articles and books and dissertations, so you're probably not going to get a fully satisfactory answer here. But here's the short version: Different systems operate on different assumptions. Your question suggests you ... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/92750/why-did-this-us-prosecutor-keep-asking-whether-documents-would-refresh-a-witness |
finance_140 | finance | What are the popular methodologies to minimize data snooping? | Are there common procedures prior or posterior backtesting to ensure that a quantitative trading strategy has real predictive power and is not just one of the thing that has worked in the past by pure luck? Surely if we search long enough for working strategies we will end up finding one. Even in a walk forward approac... | 37 | [
"backtesting",
"strategy"
] | {
"A": "The minimum variance solution loads up on securities that have low variances and co-variances. Theoretically you are correct that this should have a low expected return profile. However, it turns out - in contradiction to modern portfolio theory - that securities that have low-volatility or low-beta experienc... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/140/what-are-the-popular-methodologies-to-minimize-data-snooping |
engineering_43112 | engineering | What unit of weight is that? | Recently I was weighting stuff with my dad and as I was playing with one of the old 2 kg weights I felt with my fingers number "5". After cleaning and upon further inspection it turned out the writing on the weight says "5Φ". We checked and it indeed weights 2 kg as my dad remembered. It was done with a simple balance ... | 15 | [
"measurements",
"unit"
] | {
"A": "As other have pointed out, the main utility is to allow easier cleaning of the tank cars from sediment (solid precipitates). Usually, there is a drain in the lowest point. The reason that it is in the middle is that in this way, you can allow double the incline compared to if you had the drain at one of the e... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/43112/what-unit-of-weight-is-that |
finance_2076 | finance | How to interpret the eigenmatrix from a Johansen cointegration test? | I ran a Johansen cointegration test on 3 instruments, A B and C. The results that I got are: R 36.7 18.9 21.1 25.8 r=1 --> 8.4 12.29 14.26 18.52 r=2 --> 0.21 2.7 3.8 6.6 EigenValues EigenMatrix 0.03 --> 0.25 | 0.512 |-0.79 0.007 --> -0.96 | -0.618 | 0.14 0.00017 --> 0.05 | 0.59 | 0.59 My question is how I interpret the... | 29 | [
"statistics",
"cointegration"
] | {
"A": "I can only talk about quantitative trading. As a rule of thumb, the lower frequency you work in, the more econometrics is important, whereas for a higher frequency, the more econometrics becomes useless . (I would still recommend a top econometrician for HFT since they have what it takes to succeed, it's just... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/2076/how-to-interpret-the-eigenmatrix-from-a-johansen-cointegration-test |
finance_1565 | finance | How do I graphically represent the evolution of a covariance matrix over time? | I am working with a set of covariance matrices evaluated at various points in time over some history. Each covariance matrix is $N\times N$ for $N$ financial time-series over $T$ periods. I would like to explore some of the properties of this matrix's evolution over time, particularly whether correlation as a whole is ... | 51 | [
"time-series",
"correlation",
"covariance"
] | {
"A": "Representing time series (esp. tick data) using elaborate data structures may be not the best idea. You may want to try to use two arrays of the same length to store your time series. The first array stores values (e.g. price) and the second array stores time. Note that the second series is monotonically incr... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1565/how-do-i-graphically-represent-the-evolution-of-a-covariance-matrix-over-time |
cybersecurity_30403 | cybersecurity | Should SSL be terminated at a load balancer? | When hosting a cluster of web application servers it’s common to have a reverse proxy (HAProxy, Nginx, F5, etc.) in between the cluster and the public internet to load balance traffic among app servers. In order to perform deep packet inspection, SSL must be terminated at the load balancer (or earlier), but traffic bet... | 135 | [
"tls",
"network",
"firewalls"
] | {
"A": "OpenSSL s_client To check if you have disabled the SSLv3 support, then run the following openssl s_client -connect example.com:443 -ssl3 which should produce something like 3073927320:error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure:s3_pkt.c:1258:SSL alert number 40 3073927320:error:1... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/30403/should-ssl-be-terminated-at-a-load-balancer |
cybersecurity_222839 | cybersecurity | Why is the OS obfuscation defense against "It's a Unix system!" not widely implemented? | The Jurassic Park scene referenced in the title is infamous for how ludicrous it sounds to those who are tech literate. But it also illustrates what seems to me to be a glaringly huge hole in web security, particularly IoT devices--as soon as attackers find out a server or camera or baby monitor is running linux, they ... | 154 | [
"attack-prevention",
"operating-systems"
] | {
"A": "There are a few issues with HTTP Basic Auth: The password is sent over the wire in base64 encoding (which can be easily converted to plaintext). The password is sent repeatedly, for each request. (Larger attack window) The password is cached by the webbrowser, at a minimum for the length of the window / proce... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/222839/why-is-the-os-obfuscation-defense-against-its-a-unix-system-not-widely-imple |
engineering_32376 | engineering | What are the engineering principles for a train to get electricity from the railway | How many general methods are there for transferring electricity from the railway to a train? I could see that some trains are connected by a pantograph and some have a third rail. Are there any other methods? What is the general engineering principle behind each? What are the basic differences (pros and cons) of each m... | 20 | [
"rail"
] | {
"A": "Please note : I'm not a building designer by trade, but I have had to investigate related questions for other reasons. I'll let you in on a dirty secret about sanitation lines within buildings - The biggest concern is not about how fast things are flying, it's about maintaining air pressure and providing adeq... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/32376/what-are-the-engineering-principles-for-a-train-to-get-electricity-from-the-rail |
medicine_815 | medicine | Can being cold or wet be a significant influence in getting the common cold? | As most people know, it's a common thing to say something like "better wear a sweater, otherwise I'll get the cold tomorrow." In my limited understanding, the common cold is caused by a virus. How does being cold affect this? Can being cold and/or wet be a significant influence in your chances of 'catching' the common ... | 22 | [
"immune-system",
"infection",
"common-cold"
] | {
"A": "Overall, there has been inconsistent data on the effects of using zinc lozenges to treat the common cold. Most studies have also been done on children, which may lead to more uncertainty about its effects on adults, but some of the studies I will mention have been tested on adults. One study showed the effect... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/815/can-being-cold-or-wet-be-a-significant-influence-in-getting-the-common-cold |
engineering_47905 | engineering | How can I tell if I got counterfeit aluminum? | I recently received an order of extruded aluminum strip 3/32" thick that supposed to be 6061 hardened to specification ASTM B221. However, when we tried to bend it, it broke and the interior looked like cast zinc coated with aluminum. Is 6061 supposed to look that way and be unable to bend 90-degrees? How can I verify ... | 13 | [
"metallurgy"
] | {
"A": "I figured out a simple test. Since the density of 6061 is 2.5 g/cm3 and the density of zinc is over 7 g/cm3, all I had to do was measure the density of the material. This showed that indeed it was aluminum. So, its brittleness is probably just because it was hardened.",
"B": "The current limit specification... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/47905/how-can-i-tell-if-i-got-counterfeit-aluminum |
law_41261 | law | Is it legal to have an abortion in another state or abroad? | Alabama passed new laws recently, making abortion a very limited option. In that context is it legal for a US national who lives in Alabama to have an abortion in another state where it is legal in the circumstances she in in? have an abortion abroad, in circumstances which are illegal in the US? Does the "US national"... | 39 | [
"united-states",
"abortion"
] | {
"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... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/41261/is-it-legal-to-have-an-abortion-in-another-state-or-abroad |
medicine_13545 | medicine | Why is thalidomide a current drug on the market? | Given the thalidomide birth defect disaster of the 1960s, why was it later approved by the U.S. FDA for treatment of leprosy (1996) and of multiple myeloma (2006)? Presumably, the teratogenic issues and problems with permanent nerve damage didn't go away, as the liver can convert the "good" enantiomer to the "bad." Tha... | 17 | [
"medications",
"drug-metabolism"
] | {
"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... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://medicalsciences.stackexchange.com/questions/13545/why-is-thalidomide-a-current-drug-on-the-market |
cybersecurity_136379 | cybersecurity | Is there any reason to not show users incorrectly entered passwords after a successful login? | Our client has come up with the requirement that in case the username in question has had multiple failed login attempts, the incorrectly entered password(s) must be shown once a successful login is performed. Correctly entered information, including previous passwords, will not be shown in any case. Our lead dev has t... | 221 | [
"authentication",
"passwords"
] | {
"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 ... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/136379/is-there-any-reason-to-not-show-users-incorrectly-entered-passwords-after-a-succ |
cybersecurity_46569 | cybersecurity | Is it bad practice to use your real name online? | On some accounts I use my real name on-line (Google+/Facebook/Wikipedia/personal blog), others (Q&A/Gaming) I use an alias. My question is: Security and privacy wise, what can people do with my real name? What are the dangers of using your real name on-line. | 453 | [
"privacy",
"anonymity",
"opsec",
"persec"
] | {
"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... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/46569/is-it-bad-practice-to-use-your-real-name-online |
law_3572 | law | If someone's record has been expunged, can they legally say that they have not been arrested? | If someone applies for a job and the application asks whether they've ever been arrested, can they legally say on the application that they have not been arrested before? Note: Case was dismissed with no finding of fact. | 34 | [
"new-york-city",
"charge-dismissed",
"expungement"
] | {
"A": "Public nudity is illegal in New York as it is in almost every U.S. jurisdiction. And, if the police had arrested the nude protesters, the arrests probably would have been upheld in court, because a ban on nudity in public would probably be viewed as a time, place and manner restriction on the freedom of speec... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/3572/if-someones-record-has-been-expunged-can-they-legally-say-that-they-have-not-b |
engineering_50946 | engineering | Why do wooden gate designs recommend a brace under compression instead of tension? | Looking at guides for building wooden frame gates I almost always find the following design recommendation: The idea is that the cross brace will distribute load from the top outside corner into the bottom of the hinge bracket. I understand this logic and am sure it works but wouldn't it be preferred to use a tension b... | 22 | [
"structural-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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/50946/why-do-wooden-gate-designs-recommend-a-brace-under-compression-instead-of-tensio |
finance_1274 | finance | How can we reverse engineer a market-making algorithm (HFT)? | Consider a market participant $A$ who is mechanically following an automated liquidity providing algorithm (HFT) in a number of large cap stocks on a specific exchange. Assume furthermore that we are able to observe all orders placed by $A$ and that we know that the algorithm used by $A$ takes only public market data a... | 50 | [
"trading",
"algorithmic-trading",
"high-frequency",
"market-microstructure"
] | {
"A": "I'll take a stab at it, but this is a really broad question. A direct answer: Bayesian models often use \"probability that the counter-party is informed.\" Indirect answers: I think your assumption is that the algorithm operates on each stock individually, and has no knowledge of what it's doing in any other ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/1274/how-can-we-reverse-engineer-a-market-making-algorithm-hft |
engineering_2873 | engineering | Why do car wheels have holes? | If you have a look at the car's wheels, you'll notice that they have holes which can be of different forms (mostly circular or rectangular). Why do they have such holes? Doesn't that reduce the stiffness of the wheels? | 22 | [
"mechanical-engineering",
"automotive-engineering",
"wheels"
] | {
"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... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/2873/why-do-car-wheels-have-holes |
law_31015 | law | Can I forbid the government from using my patented invention? | (this is a purely hypothetical situation, for literary research) I've filed a patent on a certain technology for facial recognition/analysis, and as the patent holder I want to use my exclusivity to ensure it's not used to harm anyone. Unfortunately, the nature of the invented technique can be easily misused for what I... | 46 | [
"united-states",
"patents",
"texas"
] | {
"A": "Think through the logical combinations of two questions: The government is tyrannical or just, the revolution is successful or not. Tyrannical government, revolution successful: The revolutionaries will congratulate each other, and of course they are not persecuted by the new government they install . Just go... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/31015/can-i-forbid-the-government-from-using-my-patented-invention |
engineering_8064 | engineering | What is the difference between the Polar Moment of Inertia, $ I_P $ and the torsional constant, $ J_T $ of a cross section? | This question is so fundamentally basic that I am almost embarrassed to ask but it came up at work the other day and and nearly no one in the office could give me a good answer. I was calculating the shear stress in a member using the equation, $\frac{Tr}{J_T}$ and noticed, that for a shaft with a circular cross sectio... | 13 | [
"mechanical-engineering",
"structural-engineering",
"applied-mechanics",
"stresses"
] | {
"A": "This is to make sure they know what the foundation is made of. For all they knew there may have been an old tunnel underneath that would have collapsed when the new building is put on top. London is built on top of an old marsh, this type of soil is very prone to sinking and uneven settling, digging down and ... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/8064/what-is-the-difference-between-the-polar-moment-of-inertia-i-p-and-the-tors |
engineering_6257 | engineering | From an engineering standpoint, what is the purpose of the indent in a coffee lid? | I've see the same lids every day but I never really thought about their construction. There is an indent in a "Solo Travel Lid" for coffee cups that is just above the hole that you drink the coffee from. You can see the crescent shaped indent in the image. What is it for? Does it somehow increase fluid flow? Is it just... | 13 | [
"design",
"applied-mechanics"
] | {
"A": "If the receiver does not detect the sub-carrier for the \"colour burst\" signal which is transmitted during the horizontal blanking period the receiver switches on the \"colour-killer\" circuit so the set reverts to black and white mode. The colour-burst signal - 8 to 10 cycles of 3.85 MHz - is unlikely to be... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/6257/from-an-engineering-standpoint-what-is-the-purpose-of-the-indent-in-a-coffee-li |
law_33084 | law | I fancy myself an amateur lawyer. Can I represent someone in court, in the state of Maryland? | I live in Montgomery County Maryland. I am not a lawyer. But I have significant legal experience. I have successfully sued people, watched many trials, I have successfully won dozens of trials for my own traffic violations. And I'm a former state legislator. So I have read and argued about lots of legislation. Sometime... | 38 | [
"united-states",
"maryland",
"unlicensed-practice",
"legal-representation"
] | {
"A": "Yes, it's illegal You are missing something terribly important: The package might not be your property [yet]. In any way, it is not in your possession, while it is in the hands of the postal service! The contents of the package started fully owned by the sender and were entrusted to the postal service to deli... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/33084/i-fancy-myself-an-amateur-lawyer-can-i-represent-someone-in-court-in-the-state |
cybersecurity_11493 | cybersecurity | How hard is it to intercept SMS (two-factor authentication)? | A lot of two-factor authentication mechanisms use SMS to deliver single-use passphrase to the user. So how secure is it? Is it hard to intercept the SMS message containing the passphrase? Do mobile networks use any kind of encryption on SMS? I found an interesting article regarding two-factor authentication and the way... | 141 | [
"authentication",
"mobile",
"multi-factor",
"phone",
"sms"
] | {
"A": "GSM includes some protection through cryptography. The mobile phone and the provider (i.e. the base station which is part of the provider's network) authenticate each other relatively to a shared secret, which is known to the provider and stored in the user's SIM card. Some algorithms known under the code nam... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://security.stackexchange.com/questions/11493/how-hard-is-it-to-intercept-sms-two-factor-authentication |
law_38013 | law | Virginia employer terminated employee and wants signing bonus returned | A Virginia employee was terminated within 1 year of hiring because the on-site customer felt he was "too negative". Offer Letter: Along with this offer, you are receiving a $10,000.00 signing bonus, which includes $3,000.00 to be paid directly to you in your first company paycheck and the remaining $7,000.00 to be paid... | 44 | [
"employment",
"virginia"
] | {
"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... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/38013/virginia-employer-terminated-employee-and-wants-signing-bonus-returned |
engineering_28610 | engineering | What is the purpose of building foundations? | According to many sources, one of the purposes of building's foundations is "To distribute the weight of the structure over large area so as to avoid over-loading of the soil beneath." (Wikipedia) On the Wikipedia page on foundations, there is the following picture: So the foundation seems to consist of some type of "l... | 19 | [
"structural-engineering",
"foundations"
] | {
"A": "That looks like a Pratt truss . These trusses have diagonals which go from the outer-top nodes to the inner-bottom nodes (i.e. they connect to the top chord on the node furthest from the center of the span, and to the bottom chord on the node closest to the center). This design means that the diagonals are un... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/28610/what-is-the-purpose-of-building-foundations |
engineering_2114 | engineering | How to calculate lever force when lever has uniformed distributed load? | We have a simple class 1 lever: $$\begin {array}{c} \text {5,000 kg} \\ \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow \, \downarrow... | 12 | [
"mechanical-engineering",
"statics"
] | {
"A": "Answer: Yes , this is exactly how it is done in the real world. What you have described is what I do in my job to check systems in CAD. Since you indicated you would like me to step through my design process, I have detailed it below. Note that most of this does not involve CAD. CAD is invaluable, but only if... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/2114/how-to-calculate-lever-force-when-lever-has-uniformed-distributed-load |
finance_2707 | finance | How do you mix quantitative asset allocation with qualitative views? | Usually in asset allocation you have a quantitative approach (which can be from example mean-variance), but you (or you and your firm) also have a more qualitative approach given market-conditions, economic outlooks, or tactical indicators. Hence, you will eventually come up with 2 allocations, the ones strictly dictat... | 32 | [
"asset-allocation"
] | {
"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 ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/2707/how-do-you-mix-quantitative-asset-allocation-with-qualitative-views |
law_36259 | law | If a company agrees to pay travel cost for a job interview, is the promise binding and enforceable? | There is a question on workplace.SE about a company which offered to pay travel costs for a job interview, but canceled the return ticket after ending the interview - Potential Employer Cancels Return Flight . Generally, when arranging a job interview which requires the candidate to travel, it is common for the potenti... | 231 | [
"contract-law",
"employment"
] | {
"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... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/36259/if-a-company-agrees-to-pay-travel-cost-for-a-job-interview-is-the-promise-bindi |
law_3519 | law | Consent to searches: Who wins "my-word-against-yours?" | Hypothetical Officer testifies citizen consented to be searched. Citizen denies consenting to be searched. There is no other evidence (that weighs net in favor of either party). Question Whom does the judge believe? Clarifying Discussion from previous comments... Point The testimony of the officer and the citizen would... | 40 | [
"police",
"search-and-seizure"
] | {
"A": "Assuming U.S. Jurisdiction: In the case of The People vs. Hansel and Gretel Holzfaller: Ms. Gretel Holzfaller is charged with the following: 1 Count of Murder in the First Degree (Murder of Ms. Witch Hazel) 1 Count of Grand Larceny (Theft of precious metals and jewels from Ms. Hazel) 1 Count Petty Theft (Thef... | C | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/3519/consent-to-searches-who-wins-my-word-against-yours |
law_26950 | law | Can I sue a restaurant for serving me meat in vegetarian dish? | I am a vegetarian for religious reasons. I was at Chipotle on Saturday and ordered a sofritas rice bowl which is "vegan approved". To my surprise, I found a chunk of chicken in my bowl when I was halfway through eating it. Made me feel sick to the stomach realizing that I may have eaten chicken already. Went back to th... | 46 | [
"civil-law",
"food"
] | {
"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/26950/can-i-sue-a-restaurant-for-serving-me-meat-in-vegetarian-dish |
engineering_3547 | engineering | How much clearance does a car need when turning a corner? | I am contemplating buying a new car. However, the approach to the underground garage in my apartment has a 90 degree frustrating turn. Given the dimensions of the approach and car, what is the max turn circle for the car to fit the garage and turn? given Ackerman steering and the overhanging front part of the car I bel... | 13 | [
"automotive-engineering"
] | {
"A": "Please note : I'm not a building designer by trade, but I have had to investigate related questions for other reasons. I'll let you in on a dirty secret about sanitation lines within buildings - The biggest concern is not about how fast things are flying, it's about maintaining air pressure and providing adeq... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/3547/how-much-clearance-does-a-car-need-when-turning-a-corner |
law_97381 | law | Would it be legal to supply an item that deliberately stops working after the guarantee expires? | I have TV that failed about a week after the 3 year guarantee expired. Obviously this is annoying, and I'm back to using a 15 year old TV that I dug out from the attic. Realistically, this failure so close to expiry of the guarantee is probably just a co-incidence, but it did get me thinking, the TV is a 'smart TV' wit... | 35 | [
"united-kingdom",
"consumer-protection",
"is-x-legal"
] | {
"A": "australia Deliberately rendering the TV non-operational through software would appear to be malicious damage. Under the Australian Consumer Law, one of the statutory guarantees is that a product must be “durable”. Manufacturer’s can offer explicit warranties in addition but these in no way impact on the statu... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/97381/would-it-be-legal-to-supply-an-item-that-deliberately-stops-working-after-the-gu |
engineering_193 | engineering | What is the most efficient means of warming a building with a high ceiling? | Consider a large auditorium, a church, or some other very large, essentially one roomed building with a high ceiling. Suppose that the building has many entrances which enable cold air in/hot air out and traffic in and out of the building is unavoidably large. I would imagine that any attempts to control the temperatur... | 16 | [
"civil-engineering",
"building-physics",
"energy",
"hvac"
] | {
"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... | D | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://engineering.stackexchange.com/questions/193/what-is-the-most-efficient-means-of-warming-a-building-with-a-high-ceiling |
medicine_1879 | medicine | Laptops in the dark and miscalculating bats: how dangerous is that for rabies? | A few nights ago, during a township-wide power failure, I was using my laptop outside in the dark. Because mine was one of very few lights for many acres, a more than usual number of moths and other insects were flying around in the light it was emitting, but unfortunately I didn't think anything about this from a bat'... | 14 | [
"infectious-diseases",
"rabies"
] | {
"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/1879/laptops-in-the-dark-and-miscalculating-bats-how-dangerous-is-that-for-rabies |
engineering_48467 | engineering | How did mechanical engineers work before SolidWorks? | I am studying a bunch of stuff related to mechanical engineering and am considering an eventual switch to the field after taking the necessary classes. I'm older, and I took drafting classes in high school and part of college. I'm familiar with the standard drafting procedure with paper, as well as AutoCAD , and these ... | 18 | [
"cad",
"drafting",
"software",
"engineering-history"
] | {
"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/48467/how-did-mechanical-engineers-work-before-solidworks |
finance_5981 | finance | What are the advantages/disadvantages of these approaches to deal with volatility surface? | I would like to know if someone could provide a summarized view of the advantages and disadvantages of the approaches on the volatility surface issues, such as: Local vol Stochastic Vol (Heston/SVI) Parametrization (Carr and Wu approach) | 32 | [
"volatility"
] | {
"A": "The volatiltiy surface is just a representation of European option prices as a function of strike and maturity in a different \"unit\" - namely implied volatility (while the term implied volatility has to be made precise by the model used to convert prices (quotes) into implied volatilities - for example: we ... | A | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://quant.stackexchange.com/questions/5981/what-are-the-advantages-disadvantages-of-these-approaches-to-deal-with-volatilit |
law_38356 | law | Do Legal Documents Require Signing In Standard Pen Colors? | I have a question as to whether or not legal documents signed in non standard pen colors (Anything other than blue or black) are valid. I carry a purple pen around that use for everyday writing tasks, and when I was going to sign a document, someone told me that writing in purple is not valid on legal documents. If the... | 35 | [
"united-states",
"contract-law",
"new-york-state",
"signature"
] | {
"A": "at what point can you just leave? Is it always technically illegal in the UK to leave without paying the bill? Probably depends on what you mean with just leaving. If just leaving translates I haven't paid and I won't pay (because of the hassle with the card) then that's probably Making Off Without Payment, s... | B | same_domain_answer_pool | stackexchange | CC-BY-SA 4.0 | https://law.stackexchange.com/questions/38356/do-legal-documents-require-signing-in-standard-pen-colors |
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