How to best keep a bunch of coriander fresh?
How to Store Fresh Herbs
Is it possible to get a decimal output from doing division in Bash? Basically in Bash, what I'm trying to do is take a input of seconds from a user and find the hours. So basically if the user enter 35 the output should be 0.00972222.  But bash gives me is a zero.  heres the command I have:  echo "Enter the seconds you wish to convert to hours: " &amp;&amp; read sec &amp;&amp; echo " $((sec/3600)) is the amount of hours "   Is there a way I can make it so it prints out 0.00972222 if I enter 35.  Thanks! What are the assumptions for applying a quantile regression model? The question has been asked (one time) on CV before, but the answer is really imprecise and does not really answer the question in my opinion.  So: What are the assumptions for estimating a linear regression model via quantile regression?  To my understanding (and as several CV users have mentioned), quantile regression does not assume any specific distribution of the error terms - does that mean that, in a time series model, autocorrelation and heteroscedasticity do not have to be accounted for?  What about the other Gauss-Markov assumptions? I would assume that the assumption of no perfect multicollinearity has to be met when applying quantile regression, but do the parameters have to be linear? The linearity assumption only has to hold for the specific quantile I would assume.  Anyways - I do not find any backup for any of my thoughts in the scientific literature and I would appreciate a comprehensive answer. Thank you! Beryllium Vacuum Sphere Boat/Aircraft Is it possible to make a solid rigid evacuated "balloon" out of Beryllium or other elements or alloys?  The critical buckling pressure at which an evacuated sphere is given as $$ P_1=\frac{2E\cdot\left(h/R\right)^2}{\sqrt{3\left(1-\nu^2\right)}} $$ where $E$ is , $h$ the shell's thickness, $R$ the radius to the midsurface shell, and $\nu$ is .  Of course this is theoretical and experimental and literature values for submersibles hover around 1/4 of the theoretical pressure.  Beryllium has the following properties:   Density=1.85 g/cm$^3$ Young's Modulus=287*10$^9$ Pa Poisson Ratio=0.032   Calculating the upward force, buoyancy at 101.3 kPa atmospheric pressure and Radius of 10m gives 4.24*10$^8$ N. The weight of this sphere with shell thickness 1mm has 2.32*10$^7$ N downward force of Beryllium material, so it will theoretically float at ground level.   Calculating the critical buckling stress of this beryllium sphere is 331.57 kPa, which is 3.27 times the atmospheric pressure of 101.3 kPa, so theoretically it won't buckle. But in experimentation done in earlier experiments as stated before, due to construction/material non-ideal situations, the critical buckling formula predicts about 4 times stronger than actual, so it would need about 400 kPa, not 331 kPa as Beryllium sphere with this specification would hold. Increasing the strength capability also increases weight and therefore lowers it's ability to float, but Beryllium is the closest element with this situation I have calculated that could work if ideal (I have only been using periodic table elements and household materials)  Is it possible with an alloy of elements? Using the equations for buckling and buoyancy, the following is needed. What alloys/materials come to your mind?  Material considerations:   Material with larger Poisson ratio Material with larger Young's Modulus Less dense material Construction (is it possible)   Material considerations affect on lift   Thickness can be larger, increases strength by the squared. But also increases weight. If a material with lower density with similar structural properties as Beryllium is used, it would help. Radius can be lower for same reason, but also lowers buoyancy (volume)   My other designs (don't worry about these just yet, just if you are curious is a vacuum sphere with a pressurized "outer tube" with spokes in tension (carbon fiber nanotubes maybe) to keep the 2 spheres in position. Another is a spherical truss out of carbon fiber nanotubes with a light membrane around. The truss prevents the outer membrane from collapsing due to the atmospheric pressure  The "point" of this if you ask, as to why not use a traditional balloon is it can be used as a boat by filling the sphere with air, and then used as a aircraft at will by evacuating the sphere. An alternative mode of transportation for sea vessels etc. Accessing derived class property members from base class object in CSharp Searching for a tag across all Stack Exchange meta sites I want to find all questions tagged  on the meta sites of . Is there a better way than searching manually on each individual site? Why don't metals glow from red to yellow to green to blue etc.? Why only red, then yellow and then white? Shouldn't all wavelengths be emitted one by one as the temperature of the metal increases?   If some metals do glow at with different colours, could you give me examples of such metals and the reason why this happens in specific cases? Variance of Wilcoxon Rank-Sum Test (no ties) $\newcommand{\E}[1]{\mathbb{E}\left[#1\right]} \newcommand{\r}[1]{r\left(#1\right)} \newcommand{\P}[1]{\mathbb{P}\left(#1\right)} \newcommand{\Var}[1]{\text{Var}\left[#1\right]}$  Given two sets of data $X$ with $m$ points and $Y$ with $n$ points, unioned (keeping duplicates) to create a data set $Z = \{Z_i\}$ with $m + n = N$ data points, the Wilcoxon Rank-Sum Test Statistic is given by \begin{equation*} T = \sum\limits_{i=1}^{N}r(Z_i)\cdot \mathbb{I}(Z_i \in X)\text{,} \end{equation*} where $\mathbb{I}(Z_i \in X)$ is $1$ if $Z_i \in X$, $0$ otherwise. ($r(\cdot)$ denotes the rank of the data point.)  Suppose there are no ties. Then  \begin{align*} \E{T} = \sum\limits_{i=1}^{N}\r{Z_i}\cdot \E{\mathbb{I}(Z_i \in X)} &amp;= \sum\limits_{i=1}^{N}\r{Z_i}\cdot\P{Z_i \in X} \\ &amp;= \dfrac{m}{N}\sum\limits_{i=1}^{N}\r{Z_i} \\ &amp;= \dfrac{mN(N+1)}{2N} \\ &amp;= \dfrac{m(N+1)}{2}\text{.} \end{align*} This comes out to what it says in the book Nonparametric Statistical Inference, 5th ed., by Gibbons and Chakraborti.  Now for $\Var{T}$: \begin{align*} \Var{T} &amp;= \Var{\sum\limits_{i=1}^{N}\r{Z_i}\mathbb{I}(Z_i \in X)}\\ &amp;= \sum\limits_{i=1}^{N}\left[\r{Z_i}\right]^2\Var{\mathbb{I}(Z_i \in X)} \\ &amp;= \sum\limits_{i=1}^{N}\left[\r{Z_i}\right]^2\P{Z_i \in X}\left[1-\P{Z_i \in X}\right]\\ &amp;= \left(\dfrac{m}{N}\right)\left(1-\dfrac{m}{N}\right)\sum\limits_{i=1}^{N}\left[\r{Z_i}\right]^2 \\ &amp;= \left(\dfrac{m}{N}\right)\left(1-\dfrac{m}{N}\right)\left[\dfrac{N(N+1)(2N+1)}{6}\right] \\ &amp;= \left(\dfrac{m}{N}\right)\left(\dfrac{N-m}{N}\right)\left[\dfrac{N(N+1)(2N+1)}{6}\right] \\ &amp;= \left(\dfrac{m}{N}\right)\left(\dfrac{n}{N}\right)\left[\dfrac{N(N+1)(2N+1)}{6}\right] \\ &amp;= \dfrac{2N+1}{N}\left[\dfrac{mn(N+1)}{6}\right] \end{align*} The answer should be $\dfrac{mn(N+1)}{12}$. What did I do wrong? When I am using Tor, and not using the Tor bundle there is a possibility of DNS leaks in certain situations.   What can be done to minimize it? Is it possible to resolve DNS via Tor? Second law of Newton for variable mass systems Frequently I see the expression  $$F = \frac{dp}{dt} = \frac{d}{dt}(mv) = \frac{dm}{dt}v + ma,$$ which can be applied to variable mass systems.  But I'm wondering if this derivation is correct, because the second law of Newton is formulated for point masses.   Furthermore if i change the inertial frame of reference, only $v$ on the right side of the formula $F = \frac{dm}{dt}v+ma$ will change, meaning that $F$ would be dependent of the frame of reference, which (according to me) can't be true.   I realize there exists a formula for varying mass systems, that looks quite familiar to this one, but isn't exactly the same, because the $v$ on the right side is there the relative velocity of mass expulsed/accreted. The derivation of that formula is also rather different from this one.   So my question is: is this formula, that I frequently encounter in syllabi and books, correct? Where lies my mistake. sed delete option change of delimiter The following are two methods of building a link that has the sole purpose of running JavaScript code. Which is better, in terms of functionality, page load speed, validation purposes, etc.?    function myJsFunc() {     alert("myJsFunc"); } &lt;a href="#" onclick="myJsFunc();"&gt;Run JavaScript Code&lt;/a&gt;     or    function myJsFunc() {     alert("myJsFunc"); }  &lt;a href="javascript:void(0)" onclick="myJsFunc();"&gt;Run JavaScript Code&lt;/a&gt; How can I prove that the set of all functions from $\mathbb{N} \to \{0, 1\}$ is uncountable?  Edit:  This answer came to mind.  Is it correct?  This answer just came to mind.  By contradiction suppose the set is $\{f_n\}_{n \in \mathbb{N}}$.  Define the function $f: \mathbb{N} \to \{0,1\}$ by $f(n) \ne f_n(n)$.  Then $f \notin\{f_n\}_{n \in \mathbb{N}}$. Relation between intensity of light and refractive index I want to enable telnet on Windows 10.  I only see a telnet client but not a telnet server.  There is a web page telling me to open server manager and do a lot of stuff.  But, I don't have a server manager.  Please help!  I want to enable telnet. Maintaining the final state at end of a CSS3 animation I came across the following problem in a book:  Give a combinatorial proof of  $$ {n \choose 0} + {n \choose 2} + {n \choose 4} + \, \, ... \, = {n \choose 1} + {n \choose 3} + {n \choose 5} + \, \, ...$$ using the "weirdo" method (i.e., where one of the elements is chosen as special and included-excluded -- I'm sure you get the idea).  After days of repeated effort, the proof has failed to strike me. Because every time one of the elements is excluded, the term would be ${n-1 \choose k}$ and not $ {n \choose k}$, which is not the case in either of the sides of the equation. Case expressions in Access How can I disable the "Welcome, Name!" banner notification for Game Center? I'm trying to recall the title of a young adult-targeted book. It was probably published by Scholastic, or at least sold through their take-home pamphlets, which means it was probably published before I started high school in 1996. It's about a group of teenagers who receive invitations to play a game at an invitation-only arcade. When they go there, they are put in an immersive VR game in which they must learn to survive on an alien planet. I believe the game ends and they wake up back in the real world after they fall asleep on the alien one. They are invited back the the game a couple times, and then it turns out…      …they go to play the game again, but they are unable to exit it. Eventually they realize that they actually are on an alien planet now, and that the previous game-playing sessions were just training for the real thing. I believe the epilogue states that all of the players have coupled up and the females have become pregnant, and they are optimistic about populating the new planet.   I think it was told in the first-person perspective of a female player. I don't think there was a real protagonist or strong conflict; just the group of players learning how to survive in the game. One of the other players had a photographic memory and used it to map the planet's surface. I think the cover art featured of a girl wearing a VR headset over her eyes, with her hair being blown back and her mouth open in surprise. As a mod when should I vote to close content that is not flagged?