Very grateful to the comunity and this post  which I think is the product of many invisible works, so thanks. I will not be posting this question if I didn't think it could be useful, regardless of the simplicity or complexity, and ignoring that maybe it was posted previously; if this is the case excuse in advance.  The title practically describes the entire issue, to clarify I checked in both OS that the wifi-card drivers are installed and actualized. I can see other wifi nets but not my own.  When reseted the router a re-configuration was made, lowering the WiFi standard from 802.11g to 802.11 b (I guess this is correct, which I'm sure is that the change was made from higher to lower hierarchy standard). After this change I was able to detect and connect to the wireless in both Ubuntu and Windows, but now once I reboot I can not see my wireless account anymore.  Below the output of   wget -N -t 5 -T 10 https://github.com/UbuntuForums/wireless-info/raw/master/wireless-info &amp;&amp; \ chmod +x wireless-info &amp;&amp; \ ./wireless-info    And a caption of the modem specs
I'm having serious problems installing the Broadcom drivers for Ubuntu. It worked perfectly on my previous version, but now, it is impossible.   What are the steps to install Broadcom wireless drivers for a BCM43xx card?  I'm a user with no advance knowledge in Linux, so I would need clear explanations on how to make, compile, etc.    lspci -vnn | grep Network showed:   Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b]      iwconfig showed:  lo        no wireless extensions. eth0      no wireless extensions.   NOTE: Answer below is updated every time new information is added and confirmed working.
How can I underline a single word with LaTeX? Given a simple paragraph, how do I underline a word in that paragraph?  (Note: I post this here because it wasn't really obvious using google or this site and my TexNicCenter is somehow missing this highlighting option.) Is it a good practice to ask before exiting an application (with nothing to save)? Every now and then, I come across applications that, when clicking on the main window's "X", ask me whether I'm sure that I want to quit the application.    I'm not talking about asking me to save unsaved documents, but about applications that aren't document related at all.  This always bothers me, since I feel totally interrupted in my workflow. I was already thinking two steps ahead of what I want to do next, and this message box abruptly pulls 100% of my attention.  My question:  Are there any valid use cases where a non-document-centric application should ask me whether I'm sure that I want to exit the application? String manipulation with & or + in VB.NET Mods folder missing from .minecraft folder I have Windows 10 and when I go to look in my .minecraft folder in the AppData folder, the mods folder is not there.    How can I find the mods folder? Conceptual half-life Question So I have this word problem and I’m a bit confused about it. I have the answer and explanation but I still don’t understand: The half-life of carbon-14 is approximately 5730 years, while the half-life of carbon-12 is essentially infinite. If the ratio of carbon-14 to carbon-12 in a certain sample is 25% less than the normal ratio in nature, how old is the sample?     A. Less than 5730 years      B. Approximately 5730 years      C. Significantly greater than 5730 years, but less than 11460 years      D. Approximately 11460 years  Correct Answer: A Explanation: Because the half-life of carbon-12 is essentially infinite, a 25 percent decrease in the ratio of carbon-14 to carbon-12 means the same as a 25 percent decrease in the amount of carbon-14. If less than half of the carbon-14 has deteriorated, then less than one half-life has elapsed. Therefore, the sample is less than 5730 years old. Be careful with the wording here—the question states that the ratio is 25% less than the ratio in nature, not 25% of the ratio in nature, which would correspond to choice (D). How is the ratio of the carbon isotopes relevant to half-lives? What is the purpose of saying the half-life of an isotope is infinite? What is meant by “the normal ratio in nature”? Just based on the answer, it seems like the question said “25% of a carbon sample decayed, how old is this sample?” Obviously it’s younger than 5,730 years (the time for its first half life) because if only 25% decayed that means half a half-life has passed. I don’t see how isotopes and ratios would change this problem at all. Edit: Every answer here was very informative and helpful. It was tough to pick a best answer. I picked Cosma’s because it clicked with me. If you’re reading this and want to understand radiocarbon dating, look at every answer because there is some useful information in every answer How do I implement a retro-style password-based "savegame" system? find spectrum matrix A Let $A = \left[ \begin{array}{*{20}{c}} 0&amp;b&amp;0&amp;0&amp;0&amp;0\\ c&amp;0&amp;b&amp;0&amp;0&amp;0\\ 0&amp;c&amp;0&amp;b&amp;0&amp;0\\ 0&amp;0&amp;c&amp;0&amp;b&amp;0\\ 0&amp;0&amp;0&amp;c&amp;0&amp;b\\ 0&amp;0&amp;0&amp;0&amp;c&amp;0 \end{array} \right]_{n \times n}$.  Why does matrix $A$ have spectrum $\sigma (A) = \left\{ 2\sqrt {bc} \cos \left(\frac{\pi k}{n + 1}\right):k = 1,2,\ldots,n \right\}$? The runtime arguments are as follows: $1 is the path to the file containing the list of files $2 is the path to the directory containing the files What I want to do is check that each file listed in $1 exists in the $2 directory  I'm thinking something like:  for f in 'cat $1' do if (FILEEXISTSIN$2DIRECTORY) then echo '$f exists in $2' else echo '$f is missing in $2' sleep 5 exit fi done   As you can see, I want it so that if any of the files listed in $1 don't exist in the directory $2, the script states this then closes. The only part I can't get my head around is the (FILEEXISTSIN$2DIRECTORY) part. I know that you can do [ -e $f ] but I don't know how you can make sure its checking that it exists in the $2 directory. How can you construct the bijection between real numbers and functions over naturals? What is this rhetorical scheme or literary device called? I can't recall the name of the rhetorical scheme or literary device involved with using the same word more than once within the same sentence but with different meanings:  "The only thing we have to fear is fear itself."    fear - verb fear - noun   "Turn right right here."   right - adv. directional right - adv. in this place   "My feet are but feet away."   feet - noun lower appendage feet - noun distance Typing at symbol (shift+2) displays double quote (") and Typing at symbol (shift+') attherate (@) in ubuntu 16.04 I am working with ubuntu16.04. While working with terminal i had seen that my keyboard keys typing different signs. For example   Typing at symbol (shift+2) displays double quote (")  Typing at symbol (shift+') atTheRate (@)  Typing at symbol (shift+3) Euro (£)   .  I restarted my system but still it's showing same. Horizontal overflow on my profile page I have heard a few times that one way of describing quantum computers is that they essentially use the computing power of their counterparts in alternate realities that they access through superposition. My first question is, of course,    is this actually an accurate description of how quantum computers work, or just a misrepresentation?   Also, if it were to be assumed true and taken literally, then presumably all the possible outcomes of any given computation done would be experienced by each of these alternate realities. I have a few questions regarding the implications of this:   Would it be correct to say that our universe essentially "spawns" these alternate realities to use for each computation, or that they all exist simultaneously in a higher dimension and only come into contact via the initiation of superposition by each computer at the same time? Would it be possible to create contact between universes via this connection? I'd expect that, if it was, it would be entirely random, and so not only would not cause any information transfer, it also would be completely undetectable, because the deviations would be within the expected probabilities of error rates - but is there any way to circumvent this? Why was my flag declined? I've recently flagged the following , which I got in the flag queue.   The answer does not seem to attempt to address the question at all. It looks like a comment on one of the other answers (probably Luca's).  It got rejected with the following reason:  declined - flags should not be used to indicate technical inaccuracies,            or an altogether wrong answer   I did not flag this because I thought it was wrong, I flagged it because I didn't think it was an attempt to answer the question. For what it's worth, I don't get what the guy who provided that answer even tried to say.  Was I wrong to flag it? If so why? Symbol for “such that” (not in set) How exactly does curved space-time describe the force of gravity? Duplicate questions that use different words to describe the same problem are important for people to find the content via search engines. But the user experience when an anonymous user arrives at a duplicate is less than ideal.  They have to notice the duplicate link and understand that the answer they are looking for is likely behind that link. I don't think this is all that obvious to someone without experience with an SE site.  I propose to just redirect users to the duplicate automatically if the closed duplicate has zero answers. In that case they need to follow the link to the duplicate in any case, so we might as well redirect them to it in the first place.  I could imagine this being problematic with search engines, as we would be displaying different content than what the search engines see. If that is too problematic I would suggest to show a very obvious link to the duplicate in the answers section for anonymous users. When and where was “portfolio career“ first used? The expression  meaning:  the fact of having several part-time jobs at once, rather than one full-time job:    A portfolio career is suitable for people who want to have a variety in their work life.   (Cambridge Dictionary) Etymonline has no information about the origin of the above expression, can anyone tell me when and where it was first used? Access Javascript variable inside of an Apex:repeat I am currently trying to add some customer markers to a map. I can add a single marker to the map but when I move that same logic inside of an Apex:repeat I no longer have access to the map variable.  My Javascript:  &lt;script type="text/javascript"&gt;      function initialize() {       var mapProp = {         center:new google.maps.LatLng(52.634092,-0.148315),         zoom:10,         mapTypeId:google.maps.MapTypeId.ROADMAP       };                  var map=new google.maps.Map(document.getElementById("googleMap"),mapProp);            }     google.maps.event.addDomListener(window, 'load', initialize); &lt;/script&gt;   My VP page:     &lt;apex:repeat value="{!Locations}" var="local" id="mapMarkers" &gt;     &lt;script type="text/javascript"&gt;          var lat = '{!Locations[0].Geolocation__Latitude__s}';         var lng = '{!Locations[0].Geolocation__Longitude__s}';         var marker=new google.maps.Marker({             position: new google.maps.LatLng(lat, lng)             });                   marker.setMap(map);      &lt;/script&gt; &lt;/apex:repeat&gt;   The !Locations list is in my controller and just pulls the latitude and longitude from my Tree__c object:     public List&lt;Tree__c&gt; getLocations() {     List&lt;Tree__c&gt; locations = Database.query('SELECT Geolocation__Latitude__s, Geolocation__Longitude__s FROM Tree__c WHERE Geolocation__Latitude__s !=null AND Geolocation__Longitude__s !=null ');     return locations; } Is it correct to use that/which in the relative clause when it is referring to the place as an object pronoun? I was teaching an ESL class and came across this sentence which confused me a lot:  &quot;The Queen Alice is the place that I go to the most&quot; &quot;Isn't that the place which kids under 12 can't enter?&quot;  Are these 2 sentences correct? Shouldn't &quot;where&quot; be used for both sentences when it's referring to the place and replacing the object?