Platform: OS X: Yosemite 10.10.4; MacbookPro 15" Retina (mid-2015). Fact: There is aging for battery in any case - using or not. But while using - there is difference of how to use. My questions - in order to minimize battery degradation:    How often should I totally discharge battery ? Is degradation rate is a matter of full cycles or it doesn't matter to what highest and lowest level I charge or discharge laptop ? Most (99%) of the time I am connected to power - which leads to 100% charge level always. But many sites say, like following link:  say, that better to keep battery 40% charged than 100%. How to achieve that (there is no ability, as far as I know, to manually limit charging battery level) ? Do you have empirical evidences to prove or disapprove this expectations ? I ask this since to replace battery in Macbook Pro is hard to be done - many screw types, many modules do disassembly, using glue to grasp components without moving inside. And therefore I prefer doing this rarest I can. How much time (how many years) it typically takes upon your experience to get to buttery degradation of 40% capacity compared to Day-1 of using your Macbook Pro ? After 2 minutes of laptop using - the internal temperature (CPU, RAM, Battery) gets to 85-90 degrees (Celsius) and stays so till I turn off (sleep) laptop - for 12 working hours every day. Is there something I can do about heat (both in general, and regarding battery especially)?   What else should I do or know to not be frustrated later ?
How do you maximize the cycle count of your battery?  There seems to be a debate between:   Leave plugged in 24/7 but do a full cycle once a month Charge to ~100%, drain to ~10%, repeat.   NOTE: Taking your   Which method is better and why? How much of a difference does it really make?  Here are some of the better sources I've found about battery behavior so far. Even still I feel they don't conclusively answer the question above. See my elaborations below:           Elaborating on Option 1  Now IF Apple engineers were smart and optimized for AC draw when plugged in to not use up your charge cycles, then it seem logical to assume that you are using effectively none of your 1000 charge cycles while plugged in. If that's the case, it would seem that the LiPo drop from holding at 100% would be vastly outweighed by the fact you're not using any charge cycles.  However, this is a purely speculative assumption and I could find no evidence to either confirm or deny.  If this is NOT true, and the AC adapter only goes to charging the battery, then there would be no difference. Your battery would drain to 99%, then back up to 100%, then back down to 99%, etc. Those micro-charge cycles would add up at the same rate as 100% -> 0% -> 100%, and you would get no gain. In this case the negative effect of holding LiPo batteries at 100% would outweigh everything else.  Elaborating on Option 2  There are lots of good reasons why Option 2 is the way it is:   Because of known LiPo chemistry issues, holding a 100% charge for a long time causes the battery to degrade Apple specifically recommends not to leave it plugged in all the time  Draining a battery all the way to zero all the time is bad for the cell (Which is why ~10% is used) Heat is a killer, and when plugged in AND charging, you get extra heat that causes damage.   There are a couple reasons why I'm challenging Option 2:   It seems silly that the most intuitive use case for thousands of people that use their macs as primary computers is wrong. If the hypothesis in option 1 is true, you're just burning unnecessarily through your finite charge cycles. It's a pain to have to remember to keep plugging in and plugging out and be worried about whether or not your device is plugged in.
Import curly brackets from MathDesign (Utopia) I am using Fourier maths fonts with Utopia text (\usepackage{fourier}) for a book project, but I'm not satisfied with the curly brackets \{ and \}. They are too slim, and barely distinguishable from other brackets in font size 10. Utopia with MathDesign (\usepackage[utopia]{mathdesign}) seems to have better-looking curly brackets.  Is there a way of importing just the curly brackets from MathDesign to my document, sticking to Fourier otherwise. And are the curly brackets defined by the maths fonts even if they are used outside math mode, since with MathDesign you get better-looking brackets in normal text, too.    Following egreg's answer I added the suggested lines, but the sizes of the bigger brackets are incorrect. When I load type $\{\bigl\{\Bigl\{\biggl\{\Biggl\{$, this is what I get:    After a bit of research, I've found that the cause seems to be the amsmath package. I'm relying on amsmath quite heavily, so it would be nice to find a fix. Unfortunately, I have almost no experience in working with fonts in LaTeX myself.  Below is a working example:  \documentclass{article}  \usepackage{amsmath} \usepackage{fourier}  \DeclareSymbolFont{mdsymbols}     {OMS}{mdput}{m}{n} \DeclareSymbolFont{mdlargesymbols}{OMX}{mdput}{m}{n} \DeclareMathDelimiter{\lbrace}    {\mathopen}{mdsymbols}{"66}{mdlargesymbols}{"08} \DeclareMathDelimiter{\rbrace}    {\mathclose}{mdsymbols}{"67}{mdlargesymbols}{"09} \renewcommand{\textbraceleft}{%   {\fontfamily{mdput}\fontencoding{OMS}\selectfont\char"66}} \renewcommand{\textbraceright}{%   {\fontfamily{mdput}\fontencoding{OMS}\selectfont\char"67}}  \begin{document} $\{\bigl\{\Bigl\{\biggl\{\Biggl\{$ \end{document} What does a Terminator do after its mission is accomplished? A Terminator is essentially given a mission or an objective ("Go back in time and kill Sarah Connor" or something of the like).  What does a Terminator do once its mission is accomplished?  We see in Terminator 2: Judgment Day (the live-action movie) that the  (played by Arnold Terminator Schwarzenegger) completed its mission of protecting the Connors, and then sort-of just melted itself into nothingness (presumably to protect the world from discovering Terminators again).  But what would the  or the  (in Terminator 3) have done?   Are they given multiple directives ("Go kill Sarah Connor, then go kill Robert Baratheon, and then have a nice hot bath; you've earned it")?  This question is related, but not a dupe: Why Changing Permissions For Some Systems Files is Not Allowed? Evaluation of $\sum_{k=0}^n{n\choose k}^2u^k$ I am trying to evaluate the finite sum \begin{equation} f(u)=\sum_{k=0}^n{n\choose k}^2u^k,\quad 0&lt;u\le1 \end{equation}  In an first attempt, I think of the generating function \begin{equation} (1+x)^n(u+x)^n = \sum_{k\ge0}{n\choose k}x^k\sum_{k\ge0}{n\choose k}u^kx^{n-k}=\cdots+x^n\sum_{k\ge0}{n\choose k}^2u^k+\cdots \end{equation}  which means that $f(u)$ is the coefficients of the term $x^n$.  Expanding $(1+x)^n(u+x)^n$ into $[1+(1+u)x+x^2]^n$, and using the multinomial expansion, I get an expression for the coefficient of $x^n$. However, such an expression is more complicated than $f(u)$. It seems I am making the problem even more difficult.  Can someone help me find the value of $f(u)$.  Thank you. Play YouTube videos with MPMoviePlayerController instead of UIWebView In C#/VB.NET/.NET, which loop runs faster, for or foreach?  Ever since I read that a for loop works faster than a foreach loop a  I assumed it stood true for all collections, generic collections, all arrays, etc.  I scoured Google and found a few articles, but most of them are inconclusive (read comments on the articles) and open ended.  What would be ideal is to have each scenario listed and the best solution for the same.  For example (just an example of how it should be):   for iterating an array of 1000+ strings - for is better than foreach for iterating over IList (non generic) strings - foreach is better than for   A few references found on the web for the same:               [Edit]  Apart from the readability aspect of it, I am really interested in facts and figures. There are applications where the last mile of performance optimization squeezed do matter. I'm granted a one-entry Schengen visa and now I can't go. Will having an unused visa in my travel passport have any consequences like future visas refusal? Do I need to do anything special? Evaluating $\int \frac{\sin\left(x\right)}{1+x^2}dx$ $$\int \frac{\sin\left(x\right)}{1+x^2}dx$$  I have tried to integrate by parts but it doesn't work. How do I evaluate it? Any advice, hint or well-thought solution will be appreciated. SEDE should pick up on changes to community metadata It appears that site meta data isn't updated in SEDE. As an example, Moderators.SE was  to  in December 2014. It is still listed in SEDE as Moderators.SE, as of July 2015.  To search for Community Building data, we need to search the "Moderators" community:    It is not listed as Community Building: What’s (not) spam? Somebody asked the following :    Clearly this is just a troll post so I (and other users) flagged it as spam. The spam flag was subsequently disputed (which I think simply means that a moderator rejected it):    Huh? Puzzled, I took another look at the list of possible flagging reasons:     I am flagging this question because         it is spam   This question is effectively an advertisement with no disclosure. It is not useful or relevant, but promotional.   it is offensive, abusive, or hate speech   This question contains content that a reasonable person would deem inappropriate for   respectful discourse.   it is a duplicate...   This question has been asked before and already has an answer.   it should be closed for another reason...   This question does not meet this site's standards and should be closed.   it is very low quality   This question has severe formatting or content problems. This question is unlikely to be salvageable through editing, and might need to be removed.   other (needs ♦ moderator attention)   This question needs a moderator's attention. Please describe exactly what's wrong.      Of these, only a few are applicable at all: “spam”, “should be closed for another reason”, “low quality” and “requires moderator attention”.  But:   it shouldn’t be closed (it has no value – it should be deleted), it’s not “low quality” (the description seems to fit actual, albeit bad, questions), and it doesn’t require moderator attention (I certainly didn’t want to bother a mod with this worthless post).   So I still think “spam” is the most fitting reason. Maybe it would help to have a more apt reason “troll post”, or maybe we could explicitly subsume this under one of the other points? Why do we use AC for long distance transmission? Why do we use AC (Alternating Current) for long distance transmission of electrical power?  I know that AC is such a current that changes polarity (magnitude and direction) and has fixed poles. Raise all windows with a specific title I'm trying to find a way to raise all the windows that have one, specific title.  For example, I have two windows named superconky (yes, you guessed it, I'm trying to get conky running in lubuntu).  I have a command I got from the LXDE forums: sh -c 'wmctrl -k on; wmctrl -a superconky;'  I use it to show the desktop, except conky. It works perfectly, but only if you have one conky. If you have two or more, you get left with one and all the others minimized.  So, what should I do to raise all the windows?  Thanks in advance. How to change boot splash screen in 18.04 I have done this in the past in 16.04 and 17.10 but in 18.04 I can not get plymouth manager to work.  Downloaded it from the software center but it doesn't work.  Is there a guide available that will let me do it in terminal? Validation Rule on picklist under opportunities There are 2 requirements:    standard users can’t update the status of a record beyond “open won” (so that only SF Admins or auto processes update “registered” and the stages beyond registration. Validation rule for this:    ~   AND(       $Profile.Name &lt;&gt; "System Administrator",      ISCHANGED(StageName),      OR(TEXT(StageName) = "Registered",     TEXT(StageName) = "Pre-Certified",     TEXT(StageName) = "Documentation, Submission",     TEXT(StageName) = "Performance verified",     TEXT(StageName) = "Appeals",     TEXT(StageName) = "Certification/ Closed Won")      )   Requirement 2: Standard users cannot update the status of a record that is already Registered (or post-registered phase). For us, some Opp was already “Registered” but some standard user  was able to change the record to “Open Won.”    I am looking for the validation rule of requirement 2 and which should align with first requirement also.  Thanks, Please guide. Alt-click for edge loop Hi I am a complete newcomer to blender and am following this tutorial, where he says to alt+click to select an entire row or "edge loop". I have followed all instructions exactly up to this point (3 times to make sure!). Alt-click does nothing. Thank you for your help. p.s. If possible, please keep answers in simple layman's language. I see some similar posts about alt click and loop select but had trouble following since the explanations were too advanced. Thank you! Video starts where he demonstrates alt+click: How do I size a UITextView to its content? Is there a good way to adjust the size of a UITextView to conform to its content? Say for instance I have a UITextView that contains one line of text:  "Hello world"   I then add another line of text:  "Goodbye world"   Is there a good way in Cocoa Touch to get the rect that will hold all of the lines in the text view so that I can adjust the parent view accordingly?  As another example, look at the notes' field for events in the Calendar application - note how the cell (and the UITextView it contains) expands to hold all lines of text in the notes' string. Why are SMD LEDs shipped in a sealed bag containing desiccant? I had a selection of 0805 LEDs in my last Mouser order and was a bit surprised to discover they arrived in heat-sealed (rather than folded and taped with sticker) bags containing a desiccant bag and some sort of litmus-esque paper indicator saying something about baking them if the dots on it went pink (instead of blue).    A quantity of through-hole LEDs I had in the same order just came in the regular ESD-protective bag, folded over with a sticker.  What's up with SMD LEDs that they work so hard to keep them dry? Surely their dryness can't be assured once they're installed. Does it have to do with their solderability or something? Why would that be different than other SMD parts? Which is correct?     How much is the two fares?      How much are the two fares? The temperature of an electron Does an electron have a temperature, if so, what is it?  Imagine an electron (Ke = 1 eV) in a tube at room temperature (300 K)    what is its temperature?   Imagine now same electron in space (3 K) with same Ke, is it any different from the other?  What is the influence of external temperature on electrons?  Do those electrons have electric energy, or do we have such energy only when the electron hits something and discharges its Ke? can anybody tell me which one of these is the correct one? I have been searching all over the internet but I have still got no answer.  Types of books Types of book