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• Is my sequence diagram correct?

  - by Dummy Derp

  NOTE: I am self studying UML so I have nobody to verify my diagrams and hence I am posting here, so please bear with me. This is the problem I got from some PDF available on Google that simply had the following problem statement: Problem Statement: A library contains books and journals. The task is to develop a computer system for borrowing books. In order to borrow a book the borrower must be a member of the library. There is a limit on the number of books that can be borrowed by each member of the library. The library may have several copies of a given book. It is possible to reserve a book. Some books are for short term loans only. Other books may be borrowed for 3 weeks. Users can extend the loans. Draw a use case diagram for a library. I already drew the Use Case diagram and had it checked by a community member. This time I drew sequence diagrams for borrowing a book and extending the date of return. Please let me know if they are correct. I drew them using Visual Paradigm and I dont know how to keep a control of the sequence numbers. If you do, please let me know :) Diagrams

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• Unable to copy files previously extracted from archives created on a Mac, even after claiming ownership

  - by Maxim Zaslavsky

  I reinstalled Windows on my computer today, and backed up my music to a USB drive. Now, I'm trying to copy the files onto my fresh Windows partition, but I'm unable to copy files that I obtained within my previous Windows installation from zip archives created on Macs. When I try to copy those previously-extracted files, I get an error saying that I need permission from S-1-5-21-...-1000 (a bizarre long ID). The first thing I tried was to take ownership of the files by setting my new user account as the owner, but that resulted in errors saying that I need permission from myself! Some Googling suggested adding antivirus suggestions, so I excluded the relevant folders from Microsoft Security Essentials, but the issue persists. For what it's worth, it seems that some program (so far I've only installed Chrome, Microsoft Security Essentials, and the latest Windows updates) created an empty folder named 601c8c7f0e0c03f725 at the root of my external USB hard drive. What gives?

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• Can I switch input methods while Caps Lock is being held down on Windows?

  - by Syzygy

  On my Linux computer, my keyboard switches from English to Serbian when I hold the Caps Lock key. For example, to write c all I have to do is hold Caps Lock, and press the key where c is on the Serbian keyboard (in this case, they key is ; on the English keyboard). When I release Caps Lock, the keyboard "switches back" to English, so that if I press ; I get ; as desired. Super useful. Please note that I know how to change the keyboard layout. I want to use Caps Lock as a modifier key to change the language only while being held down! Is there a way to replicate this behavior on Windows 7 or Windows 8?

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• Black GUI with minimal desktop icons appeared after powering on my desktop PC

  - by Christopher Chipps

  My computer powered on fine but after POST, a dialog box appeared with a red "X" and it gave some sort of warning. It had a long file name, I cannot recollect the entirety of it but it was something like C:/system32/desktop....After clicking ok, the GUI was totally black with only the Recycle Bin icon in the Desktop, and the Taskbar was there as well. I restarted it, and the GUI was back to normal with the icons and wallpaper in their proper place. I'm sure if I knew more of that file name in the dialog box, that would be helpful to those reading this but should I be concerned that this happened?

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• Windows 7 - Ubuntu 10.10 Dual Boot Partitioning Recommendation for HP Laptop OEM

  - by Denja

  Hi Linux Community, After been temporary impressed with the newb Windows 7 and after intensly using it I find my self struggling with the ever slow and buggy windows OS once again. It's Time to go with the Ubuntu/Linux way for a better and faster tomorrow. Unfortunately in my country most Users/Business use Windows based Systems. As a Computer technician i want to learn and use both Systems and possibly introduce New users to more affordable Linux Based Systems. For now I want to create dual-boot or even triple boot layouts on my laptop machine Here's the layout in use now: * (C:) Windows 7 system partition NTFS - 284,89GB (Primary,Boot,Pagefile,Dump) * HP_TOOLS system partition FAT32 - 99MB (Primary) * (D:) RECOVERY partition NTFS - 12,90GB (Primary) * SYSTEM partition NTFS 199MB (Primary) Here's the layout I want to make. * (C:) Windows 7 system partition NTFS - 60GB (Primary) (sda1) * (D:) Windows data partition (user files) NTFS - 60GB(Extended or Primary)(sda2);wanna share with Linux * Linux root Ext4 - 10GB (Primary)(sda3) * Linux swap swap- RAM size, 3GB (sda4) * Linux home Ext4- 164,9GB (Extended)(sda5) Question 1: Is the layout that i want to make correct as the Primary and Extended Partition concerns ? Question 2: Can I definitely get rid of SYSTEM Boot loader of windows? Question 3: If I get rid of HP_TOOLS and RECOVERY partition will it be a problem? Question 4: Based on my layout what is your suggestion for a Triple Boot layout for OSX or Puppy Linux? Thank you in advance for your advises and suggestions.

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• SQL Server 2012 Memory Manager KB articles

  - by SQLOS Team

  Since the release of SQL Server 2012 with a redesigned memory manager, a steady stream of KB articles have been produced by CSS to provide guidance on the new or changed options, as well as fixes that have been published..   How has memory sizing changed in SQL 2012? 2663912 Memory configuration and sizing considerations in SQL Server 2012 - http://support.microsoft.com/default.aspx?scid=kb;EN-US;2663912     Setting "locked pages" to avoid SQL Server memory pages getting swapped has been simplified, particularly for Standard Edition, the details can be found here: 2659143 How to enable the "locked pages" feature in SQL Server 2012 - http://support.microsoft.com/default.aspx?scid=kb;EN-US;2659143   Note the following deprecation (particularly relevant for 32-bit installations): 2644592 The "AWE enabled" SQL Server feature is deprecated - http://support.microsoft.com/default.aspx?scid=kb;EN-US;2644592   Note the following fixes available: 2708594 FIX: Locked page allocations are enabled without any warning after you upgrade to SQL Server 2012 - http://support.microsoft.com/kb/2708594/EN-US 2688697 FIX: Out-of-memory error when you run an instance of SQL Server 2012 on a computer that uses NUMA - http://support.microsoft.com/kb/2688697/EN-US Originally posted at http://blogs.msdn.com/b/sqlosteam/

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• Avast Antivirus downloading data from net even when told not to update.

  - by Nathan W

  Hi all, This is a strange problem that I have never seen before. I have two machines, both running Win 7 and running the latest version of Avast, both seem to be downloading large amounts of data. I noticed it when we were using more data for our monthly limit then normal, 2gb+ in a couple of days when really only browsing. I installed NetLimiter and let it run for couple of hours and this is the result for the avast! Service (c:\program files\alwil software\avast5\avastsvc.exe ). The other computer downloaded twice as much data in the same amount of time. Both installs of avast have their automatic updates (turned off at 4:00pm), for both program and definitions. Does anyone know what might be going on here.

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• Netbook with Windows 7 Starter - Can I upgrade to Professional or Ultimate?

  - by Andrew J. Brehm

  There are finally Windows 7 netbooks available, but they come with Windows 7 "Starter". Can I upgrade "Starter" to Windows 7 Ultimate using a normal retail DVD (and its new licence key)? What about special netbook drivers? Will they be replaced by an in-place upgrade? Does Windows 7 even have a way to upgrade to another edition or will I have to delete and re-install? If I delete and re-install, how will I get the special netbook drivers to install again? In my case it will probably be a HP netbook (HP Mini 110-1115SA). Can I just install the drivers from the HP CD that comes with the computer? Any ideas?

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• Can't SSH to remote server,how to avoid this

  - by snow8261

  From time to time,we suffer problems like we can not remote connect to our server via ssh.So we have to send someone on site to restart the computer for this problem.It causes a lot of pain.The situation is we have to remote connect to our server,which are very important like database server and application server and etc.We have met problems like ssh hang,like command ssh [email protected] with no response. when using ssh -v debug mode, it says : debug1: Connection established. debug1: identity file /.ssh/identity type -1 debug1: identity file /.ssh/id_rsa type -1 debug1: identity file /.ssh/id_dsa type -1 debug1: loaded 3 keys and we met this situation many times with no clue how to solve it.Is any log which can identify this problem? or Is there a tool for this problem? help needed!Any idea are appreciated.

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• Windows 7 laptop's volume with headphones way too loud

  - by jcao219

  I have two headphones, neither has any amps or volume control, and both have the same problem with this computer. I normally have the volume on 10%, and that is optimal. I'm still very afraid that someday it will be at 100% and i'll accidentally have my headphones on. I tested how loud it is at maximum volume -- it's earsplittingly loud! In fact, it's so loud that if I lay the headphones down on the table, I can listen to a song perfectly clearly from meters away. Is there any way to make the volume control more safe for the ears?

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• No win 7 users available for login after dell datasafe factory reset

  - by user897052

  I created install discs using the Dell datasafe 2.0 backup utility in order to re-install windows on a friend's laptop (dell inspiron n5110). I ran the discs to do a factory reset. after the whole process, it booted, started loading windows 7, displayed the messages "setup is preparing your computer for first use" and "setup is checking video performance," and showed the login screen. However, there don't seem to be any active users on the machine - I opened a command prompt window to check the users on the machine. Using the command prompt (again, from the login window), i activated/enabled the administrator account, and even created another admin account, and upon logging in received several errors, couldn't load any mmc's, etc. any help would be appreciated.

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• Semi-random clicking sound from Macbook Pro

  - by Justin Love

  There is an occasional click sound coming from my Macbook Pro (17", 2.2 Ghz Core 2 Duo) I upgraded to Snow Leopard recently, but the computer was also in for service about week before that, so I can't be certain the OS upgrade is related. The sound has no set interval and frequency varies from rare to every few seconds. I can alleviate the sound by turning up the fan speed with smcFanControl. Turning the right fan up about half way seems to be sufficient. Unfortunately, turning up the left fan also causes the right to turn on, because the sound seems to be slightly more to the left. The cause seems to be either a fan or heat-related.

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• How to Attach Sticky-Note Reminders to Windows and Applications

  - by Erez Zukerman

  Some applications come with a boatload of keyboard shortcuts; these can make you very fast, but can be difficult to remember, especially if you customized some of them. What if you could have your own little cheat sheet that would pop up next to the application every time your ran it? Read on to see how you can make one. We’re going to be using an excellent (and free) application called Stickies. If you don’t have it yet, go to the Stickies homepage, download it, and install it. Latest Features How-To Geek ETC How to Get Amazing Color from Photos in Photoshop, GIMP, and Paint.NET Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? Get the MakeUseOf eBook Guide to Hacker Proofing Your PC Sync Your Windows Computer with Your Ubuntu One Account [Desktop Client] Awesome 10 Meter Curved Touchscreen at the University of Groningen [Video] TV Antenna Helper Makes HDTV Antenna Calibration a Snap Turn a Green Laser into a Microscope Projector [Science] The Open Road Awaits [Wallpaper]

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• Problems with chip fan and CPU fan

  - by JS Bangs

  I have a five-year-old ASUS motherboard that has been working fine for me for years, until I attempted to power it on yesterday and got a CPU fan speed and chip fan speed warning. Cracking open the case and powering the computer on, I can see the chip fan working, but it appears to be hitting something as it makes a very loud buzzing noise. The CPU fan, meanwhile, starts up when I power on, but slows down and stops after a few seconds! How can I address these problems? Is there any way to fix these sort of fan speed issues without just replacing the fan (which in the case of the chip fan, probably means replacing the whole motherboard)?

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• Could we build a mega-processor out of superconductors?

  - by Carson Myers

  A superconductor, once cooled below a critical temperature, loses all of its electrical resistance and therefore becomes 100% efficient. This means that when a current flows through a superconductor, none of the energy is lost to heat or light. Theoretically, could we build a processor out of superconductive materials, that could effectively run at, oh I don't know, say, 300ghz? or 5,000ghz? Since a superconductive circuit is 100% efficient, this means that once supplied with electricity, the source of power could be completely removed from the circuit and the current would continue to flow forever. So if we made all the components inside a computer out of superconductive materials, could we get away with only supplying power to the peripherals and save a-whole-lot on energy, while dramatically increasing computing speed? Might this be one of the next big breakthroughs in computing? What do you think?

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• Lack of Virtual Memory - confusion

  - by Wesley

  Specs ahead of time: AMD Athlon XP 2400+ @ 2.00 GHz / 1 GB PC-3200 DDR RAM / 160 GB IDE HDD / 128 MB GeForce 6200 AGP / FIC AM37 / 350W PSU / Windows XP Pro SP3 So, XP has pop-ups saying that I am low on virtual memory. However, I have a program called SmartRAM (part of Advanced SystemCare by IObit) and it displays CPU & Page File Usage and Free Physical and Virtual Memory. That program shows that I have at least 2000 MB free virtual memory on my machine when the XP pop-ups say that I'm low on virtual memory. First off, would a complete lack of virtual memory cause my computer to freeze? Secondly, how can I solve this lack of virtual memory? (A complete reformat is possible but can't be done immediately...) Thanks in advance.

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• Apache rewrite rules not causes a download dialog of the PHP file

  - by Shaihi

  I have Apache 2.2.17 using the WAMPServer 2.1 installation. I am debugging a website fully local on my computer. I have the following rule in the .htaccess: # Use PHP5 Single php.ini as default AddHandler application/x-httpd-php5s .php Options +FollowSymlinks RewriteEngine on Rewritebase / RewriteRule ^bella/(.*)/(.*)$ beauty.php?beauty_id=$1 [L] RewriteRule ^(argentina|brasil|chile|colombia|espana|mexico|rep_dominicana|uruguay|venezuela|peru|bolivia|cuba|ecuador|panama|paraguay|puerto_rico)/$ country.php?name=$1 [L] RewriteRule ^(argentina|brasil|chile|colombia|espana|mexico|rep_dominicana|uruguay|venezuela|peru|bolivia|cuba|ecuador|panama|paraguay|puerto_rico)/(hi5|facebook|twitter|orkut)/$ socialnetw.php?country=$1&category=$2 [L] The problem When I enable this rule and try to access http://localhost/index.php using FF I get a download dialog for the PHP file. If I comment the Rewrite* part in the .htaccess file then the index.php file loads fine, but navigation in the page is broken...

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• How to keep the function key locked on Lenovo E431?

  - by Bob

  For the Lenovo e431, how do you keep the function key locked. Right now, the default is when you press F1-F12, he multimedia controls are active. To get to the standard F1-F12, you have to hold down Fn+the function key. This used to available in bios, but for this laptop model, it no longer is available. You can press Fn+esc, and it locks it for that session, but when the computer reboots, this is reset back to the default. Is there a way so that the default is not the multimedia function keys, but just the standard, legacy function keys? Thanks.

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• PSU requirement question for my PC setup.

  - by user69474

  I understand that sometimes there may be a situation where the PSU is way more than required but in this case of mine, I'm not too sure. Sometimes when I play games, my computer will crash and restarts itself, 10 mins into the game. Once I received a message that says something like the power is overheating or something like that. Ok, so I have a 500W PSU. I have: 1x Internal DVD writer 1x SATA 250GB HD 1x Nvidia 8500 GT 2GB RAM. As I'm planning to get an additional 250GB SATA HD, I wonder if I need to increase my PSU as well -- in full knowledge of the previous crashes experienced before. Should I upgrade my PSU to 650W perhaps, or is that excessive?

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• how to print labels from UPS printer on UPS website

  - by paynes_bay

  I have several computers, in my office, that have UPS printers attached to them. On most of these computers if you go to ups.com, login, and print a shipping label out, it prints out just fine. The website somehow selects the appropriate printer and prints to it. It doesn't present a prompt, asking you to select the printer, the number of pages, etc - it just prints it. Only problem: there's one computer on which it's not doing this and I don't know why. I can see the printer in Printers and Faxes and can print out test pages from the Properties tab, so the printer clearly works - it just isn't printing out from UPS's website. Any ideas?

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• Multiple User VPN

  - by Aaron

  I am looking for a cheap or free solution to be able to connect multiple people via VPN to a host computer. Each person should not be able to see what the others are doing while logged in. Is this possible and if so where do I start my hunt? Aaron Update: I was not sure what server, was just thinking of doing it on say a win7 desktop. Just looking into having 2-3 users have access to a program without each seeing each other. Basically, I know nothing and want to know if this is a possibility for me. lol

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• ASP.NET Connections Spring 2012 Talks and Code

  - by Stephen.Walther

  Thank you everyone who attended my ASP.NET Connections talks last week in Las Vegas. I’ve attached the slides and code for the three talks that I delivered:   Using jQuery to interact with the Server through Ajax – In this talk, I discuss the different ways to communicate information between browser and server using Ajax. I explain the difference between the different types of Ajax calls that you can make with jQuery. I also discuss the differences between the JavaScriptSerializer, the DataContractJsonSerializer, and the JSON.NET serializer.   ASP.NET Validation In-Depth – In this talk, I distinguish between View Model Validation and Domain Model Validation. I demonstrate how you can use the validation attributes (including the new .NET 4.5 validation attributes), the jQuery Validation library, and the HTML5 input validation attributes to perform View Model Validation. I then demonstrate how you can use the IValidatableObject interface with the Entity Framework to perform Domain Model Validation.   Using the MVVM Pattern with JavaScript Views – In this talk, I discuss how you can create single page applications (SPA) by taking advantage of the open-source KnockoutJS library and the ASP.NET Web API.   Be warned that the sample code is contained in Visual Studio 11 Beta projects. If you don’t have this version of Visual Studio, then you will need to open the code samples in Notepad. Also, I apologize for getting the code for these talks posted so slowly. I’ve been down with a nasty case of the flu for the past week and haven’t been able to get to a computer.

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• Accessing localhost on my iPhone

  - by mohabitar

  I've found similarly titled questions, but none that directly address my issue. I'm running Google App Engine server on my Macbook, and it was configured to use port 8080 on localhost. And so anytime I wanted to run my site, I'd just go to localhost:8080/saveuser and everything worked fine. Now, I want to access this same site on my iPhone. I can't just do localhost on my iPhone, so I set up Web Sharing on my mac, and it's set up to http://192.168.1.106/~mohabitar. I can access this from my iPhone, but it only displays a directory of my files, and doesn't actually run the Python script. The only way my Python scripts actually run is if I do localhost:8080 on my computer. What can I do about this?

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• Removing a custom vim configuration

  - by Hovercouch

  I've added a lot of small mappings to my vimrc that help me work, like noremap H ^ and inoremap jk <esc>. It's diverged enough from vanilla vim that other people at work have trouble coding on my computer. This has been making it harder to pair program with people and get help reviewing code. What I'd like is a way to quickly toggle on/off all of my custom mappings and switch between my vim config and a more 'conventional' one (like relative vs absolute numbering). What would be the best way to do this?

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• How share internet connection between two laptops

  - by danielgratzz

  I have what appears to be a cable modem plugged into the wall with only ONE ethernet port on it. Therefore i can only connect one computer to it. Also, it has no wireless capability. I have to dialup the connection and enter a username and password on my laptop. But how can i share this internet connection between two laptops running windows 7 ultimate? I have spare ethernet cables if that would help... Please help, thank You.

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