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  • Evaluating mean and std as simulations are added

    - by Luca Cerone
    I have simulations that evaluate a certain value X. I run the simulations several times and save the value of X in a vector V. When all the runs have finished I evaluate the mean and standard deviation for the vector V. This approach works, but implies saving all the values for X. As my computer is quite old and with limited ram, I was wondering if there is a way to update the mean value M and the standard deviation S, knowing the value of X at the (n+1)-th run, and the values of M and S after n runs. How can I update the mean value and the standard deviation as simulations are added to the set? Please note that this is just a conceptual example, I don't save only one number X but thousands at each simulations, so I really have problems running a big number of runs if I have to keep all the past values into the memory.

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  • A view from the call center for the Nashville Flood telethon

    - by Rob Foster
    I want to break away from my usual topic of something technical and talk about what I experienced tonight while working in the call center for the Nashville Flood telethon, which was broadcast on WSMV, CNN, and The Weather Channel.  We started receiving calls about 7pm local time and to be honest, I had no idea what to expect when going into this.  I mean, I'm a pretty good talker, but this is different...We had a good script of what to say and how we were supposed to say it, as well as paper forms and pens that we used to collect information from people who wanted to donate their money to help.  I took my first few calls pretty easily and it went pretty quick and easy.  Everyone was upbeat and happy to be in the call center as well as people happy to be donating money. Pizza, snacks, and soft drinks were flowing well.  Everyone is smiling and happy.  :) About 3 or 4 calls into my night, I got a call from a lady that had lost 2 family members in West Nashville who drowned in the floods.  She was crying when she called and I of course tried to console her.  She told me how bad her situation was, losing family members and much of her neighborhood.  After all this, she still just wanted to help other people.  She was donating all the money that she could to the telethon and I want to share a direct quote from her: "I want to donate this instead of buying flowers for my family members' funeral because people out there need help.". Please let me pause while I get myself together <again>.  That caught me so off guard (and still does). I had kids calling wanting to donate their allowance, open their piggy banks, whatever they could do.  These are kids.  Kids not much older than my boys.  Kids who should be focused on buying the next cool video game or toy or whatever but wanted to do something.  Everyone just seemed to want to help. I took calls from as far away as British Columbia as well and pretty much coast to coast.  how cool is that? Yet another thing that caught me off guard.  This kind lady that called from British Columbia told me how much she loved visiting Nashville and just hated to see this happen.  I belive that she said that she will be attending the CMA Fest this year too.  I was sure to tell her not to cancel her plans!  :) It felt like every call I took (and I took A LOT, as did everyone else) was very personal and heartfelt.  I've never had the privelage to do anything like this and fell lucky to have been able to help out with answering phones and logging donations.  Nashville will bounce back very quickly, people are out there day and night helping each other, and the spirits are very high here.  I hope that one day, my kids read this blog and better understand who they are, where they come from, and what the human spirt is and can be.  I love this city, I love the people here, I love the culture and even more than ever am proud to say that this is me.  This is us.  We are Nashville!

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  • Is there a constant for "end of time"?

    - by Nick Rosencrantz
    For some systems, the time value 9999-12-31 is used as the "end of time" as the end of the time that the computer can calculate. But what if it changes? Wouldn't it be better to define this time as a builtin variable? In C and other programming languages there usually is a variable such as MAX_INT or similar to get the largest value an integer could have. Why is there not a similar function for MAX_TIME i.e. set the variable to the "end of time" which for many systems usually is 9999-12-31. To avoid the problem of hardcoding to a wrong year (9999) could these systems introduce a variable for the "end of time"?

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  • Hard drive and DVD drive are not being detected by the BIOS

    - by Shah Nsd
    My hard drive and DVD drive are not being detected by the BIOS when I go in to the boot option menu by pressing F12. When I put the hard drive in a different computer it's being detected. I am assuming it's either the mother board or the BIOS. Since the HDD is not being detected I have installed Ubuntu on a flash drive, but even that has become so slow, that it takes around 5 minutes for it to boot. I want to flash the BIOS before I think of changing the motherboard. I have downloaded the updated file and it has a flash.bat and a afudos.exe. I have to run the .bat file. I downloaded the Dos in a box and went to the DOS directory where the .bat file is and tried to run it, but it gives me the error message "This program cannot run under this operating system" Any help would be appreciated

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  • Absolutely Nothing Apearing in "Additional Drivers"

    - by Joshua Arroyo
    OK so I just got Ubuntu the other month or so. I'm running the 11.04 version currently and trying to install drivers for a Nvidia graphics card (it's my brother's computer and he currently cannot find the number of the card right now). I read that, to install the proper drivers for gaming, I would need to go into "Additional Drivers" and choose them myself. I clicked to go into "Additional Drivers" and it searched "for available drivers", then opened the additional drivers list. Lo and Behold, there was nothing, simply the message "No proprietary drivers are in use on this system" and the Help and Close buttons. Sorry if there's some silly simple answer to all of this, I'm new to this sort of thing (used to Windows simplicity, lol) and I really don't know what to do. Help would be much appreciated. Also, I should mention that the graphics card was installed and ran fine before switching from Windows XP to Ubuntu.

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  • Is Information Technology really Engineering?

    - by RPK
    While travelling I met a mathematician who was sitting near me. In a discussion he said: "...there is nothing like engineering in IT or rather programming". A true engineering is what Architecture is, what Electrical and Mechanical is. It made me think and I was puzzled. A percent of my brain agreed also because in Indian Army, there is no subject like Computer Engineering in the Engineering Corps. They don't consider programming as engineering. This is what I heard few years back, I don't know what Indian Army thinks now. What are your views?

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  • Strategies to Defeat Memory Editors for Cheating - Desktop Games

    - by ashes999
    I'm assuming we're talking about desktop games -- something the player downloads and runs on their local computer. Many are the memory editors that allow you to detect and freeze values, like your player's health. How do you prevent cheating via memory-modifiation? What strategies are effective to combat this kind of cheating? For reference, I know that players can: - Search for something by value or range - Search for something that changed value - Set memory values - Freeze memory values I'm looking for some good ones. Two I use that are mediocre are: Displaying values as a percentage instead of the number (eg. 46/50 = 92% health) A low-level class that holds values in an array and moves them with each change. (For example, instead of an int, I have a class that's an array of ints, and whenever the value changes, I use a different, randomly-chosen array item to hold the value)

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  • How do I mount this HDD?

    - by Casval Deikun
    I have a Windows HDD attached to an external docking bay on my Ubuntu System, but the HDD brings up an error message: Mounting exited with exit code 14:windows is hibernated, refused to mount. Failed to mount '/dev/sde2':Operation not permitted. The NTFS partition is hibernated. Please resume and shutdown windows properly or mount the volume read-only with the 'ro' mount option, or mount the volume read-write with the 'remove_hiberfile' mount option. For example type in command line: mount -t ntfs-3g-o remove_hiberfile/dev/sde2/media/FE46D60C46D5C615 I am at a loss for exactly how to remove the hiberfile, or even mount it as read-only or read-write. I tried directly copy and pasting that exact command into my terminal, but it said: mount:only root can do that I do not know what to do at this point. I do need to get the information off of this drive, but I do not have a computer to put it in. Does anyone know what I should do from here?

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  • Settings for multiple monitors are not stored

    - by JJD
    I am running Ubuntu 12.04. on a Lenovo Thinkpad T400. I connected an external monitor as a second display. The laptop stands under the external screen. The laptop has a native resolution of 1440x900 (16:10), the external monitor 1280x1024 (5:4). There are two graphic adapters: one internal Intel GMA 4500 MHD and an discrete ATI card. Currently, the integrated Intel is enabled. I use the Display application to arrange the position of the monitors so it look like this: The problem: Whenever I restart my computer the configuration gets lost. First, the displays are mirrored instead of extended. I have to press Fn + F7 two times to switch to extended mode. Second, the Display settings still look like this: I know this worked once when I was running Ubuntu 10.10. I cannot tell since when it does not work. Do you know how I can permanently store the settings?

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  • The Basics of Project Management / Software Development

    - by Sam
    It suddenly struck me today that I have never developed any large application or worked with a team of programmers, and so am missing out a lot - both in terms of technical knowledge and the social-fun part of it. And I would like to rectify that - an idea is to start an open source group by training college students (for no charge) and developing some open source application with them. Please give me some basic advice on the whole process of how to (1) plan and (2) manage projects in a team. What new skill sets would you recommend? (I have read joel on software and 37 Signals, and got many insightful tips from them. But I'd like a little more technical knowledge ...) Background (freelancer, past 4+ years) - Computer engineer graphic / web designer online marketing moved on to programming in PHP, Perl, Python did Oracle DBA OCP training to understand DB's current self-assigned title - web application developer.

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  • Peaceful Alpine River on a Sunny Day [Wallpaper]

    - by Asian Angel
    Lull [DesktopNexus] 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? Peaceful Alpine River on a Sunny Day [Wallpaper] Fast Society Creates Mini and Mobile Temporary Social Networks Page Zipper Unpacks Multi-Page Articles for Single-Page Display Minty Bug: Build an FM Bug Inside a Mint Container Get the MakeUseOf eBook Guide to Hacker Proofing Your PC Sync Your Windows Computer with Your Ubuntu One Account [Desktop Client]

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  • Qt Certification Exams

    - by karlphillip
    I'm wondering about doing a Qt Certification Exam this year, but I'm not 100% sure the investment is worth. I'm considering it because I think it could be a nice + on my resume, and as you know, I'm all for improving my software engineer persona. As I already earn a BSc and MSc degrees in computer stuff, I guess I see the certification process as some kind of adventure. Anyway, I know I'll spend a lot of time preparing myself for the exam and I just wanted to know if a Qt certification is worth the effort. Apparently there are 2 certificates that you can get in the Qt world: Nokia Certified Qt Developer (basic) Nokia Certified Qt Specialist (advanced) Nowadays I build cross-platform software in C++ and this exam would fit beautifully in my resume. My main concern is that, given the obscure future of Qt, I might be throwing time and money out the window. I'm looking for some advice regarding the usefulness of such certifications.

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  • Do programmers at non-software companies need the same things as at software companies?

    - by Michael
    There is a lot of evidence that things like offices, multiple screens, administration rights of your own computer, and being allowed whatever software you want is great for productivity while developing. However, the studies I've seen tend toward companies that sell software. Therefore, keeping the programmers productive is paramount to the company's profitability. However, at companies that produce software simply to support their primary function, programming is merely a support role. Do the same rules apply at a company that only uses the software they produce to support their business, and a lot of a programmer's work is maintainence?

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  • Installation automation

    - by Denis Gorbachev
    Use case: When I install Ubuntu on another computer, I need to: install all the packages that I use; make some config changes; svn checkout some projects; git clone some projects; setup .ssh/config; download a custom Eclipse build; download some additional Eclipse plugins; make many other tweaks. So, I want to run a script, like sudo install-everything-needed, that would execute these predefined actions. Is there any package that provides the backbone for such system?

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  • Rosegarden don't work

    - by Brallan Aguilar
    I recently installed Rosegarden. When it had ran for the first time, it worked excellent. After, I had to restart my computer and when I ran it for the second time, something strange was occurred: according to the System Monitor, Rosegarden was running, in spite of I couldn't see the application, sometimes it's opened at other desktop and also Unity always has some instability problems like disappear the title bar of other programs or a zone is marked (for example, when we drag a window to the right side, we can see an "orange" area and the window's size is reduced to distribute at the middle of the desktop) at the left side of the screen and isn't hidden.

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  • What is the *correct* term for a program that makes use of multiple hardware processor cores?

    - by Ryan Thompson
    I want to say that my program is capable of splitting some work across multiple CPU cores on a single system. What is the simple term for this? It's not multi-threaded, because that doesn't automatically imply that the threads run in parallel. It's not multi-process, because multiprocessing seems to be a property of a computer system, not a program. "capable of parallel operation" seems too wordy, and with all the confusion of terminology, I'm not even sure if it's accurate. So is there a simple term for this?

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  • SharePoint 2010 Hosting :: HTTP Error 503. The Service in Unavailable.

    - by mbridge
    Error Message: HTTP Error 503. The service in unavailable. The application pool is shutdown and the Event Viewer indicates: Log Name:      Application Source:        Microsoft-Windows-User Profiles Service Date:          4/24/2010 4:58:28 PM Event ID:      1500 Task Category: None Level:         Error Keywords: User:          GUERILLA\spapppool Computer:      SPS2010RTM.guerilla.local Description: Windows cannot log you on because your profile cannot be loaded. Check that you are connected to the network, and that your network is functioning correctly. DETAIL – Unspecified error Solution: Option 1 – Log on locally with the service account once to create a local profile for it. Option 2 - Modify the application pool by going into IIS > Application Pools > Right-Click offending app pool > Advanced Settings > Set “Load User Profile” to False. Give it try!! Good luck!!

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  • How To Set Different Speeds for Your Trackpad and External Mouse

    - by YatriTrivedi
    Your laptop’s got a trackpad, you use a mouse for gaming, and you’re tired of manually switching settings constantly. Here’s how to separate both devices and how to set up a hotkey to switch between two settings on one device. 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? Peaceful Alpine River on a Sunny Day [Wallpaper] Fast Society Creates Mini and Mobile Temporary Social Networks Page Zipper Unpacks Multi-Page Articles for Single-Page Display Minty Bug: Build an FM Bug Inside a Mint Container Get the MakeUseOf eBook Guide to Hacker Proofing Your PC Sync Your Windows Computer with Your Ubuntu One Account [Desktop Client]

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  • Can't connect to Wireless Access Point after installing proprietary drivers

    - by user6554
    I had Windows Vista Basic installed on my computer and I replaced it with Ubuntu 10.10. I then preceded to do the following: I downloaded the wireless driver from 'additional drivers' I enabled my wireless card And now it won't connect to my router but my game systems will. Then I downloaded WiFi-Radar  which did not seem to fix the problem. I still cannot connect to the Internet. I have done an exhaustive search of the Internet and turned up nothing.

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  • Basic Form Properties and Modality in VB.NET

    Creating your First VB.NET Form 1. Launch Microsoft Visual Basic 2008 Express Edition. If you do not have this program, then you cannot create VB.NET forms. You can read an introductory tutorial on how to install Visual Basic on your computer: http://www.aspfree.com/c/a/VB.NET/Visual-Basic-for-Beginners/ 2. Go to File - gt; New Project. 3. Since you will be creating a form, select Windows Forms Application. 4. Select a name for your form project, e.g. MyFirstForm. 5. Hit OK to get started. 6. You will then see an empty form -- just like an empty canvas when you paint. It looks like th...

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  • How To Access the Developer Options Menu and Enable USB Debugging on Android 4.2

    - by Chris Hoffman
    In Android 4.2, the Developer Options menu and USB Debugging option have been hidden. If you need to enable USB Debugging, you can access the Developer Options menu with a quick trick. The developer options aren’t just used by developers. USB Debugging is required by adb, which is used for rooting an Android device, backing it up, installing a custom ROM, taking screenshots from a computer, or doing many other things. Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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  • How can I break out of ssh when it locks?

    - by Wayne Werner
    Hi, I frequently ssh into my box at home from school, but usually when I change classes and my computer suspends, the pipe will be broken. However, ssh simply locks up - ^c, ^z and ^d have no effect. It's annoying to have to restart my terminal, and even more annoying to have to close and re-create a new screen window. So my question, is there an easy way to make ssh die properly (i.e. when the pipe fails "normally" it will exit with a message about a broken pipe)? Or do I have to figure out what the PID is and manually kill it? Thanks!

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  • Nautilus is really slow

    - by david
    Nautilus used to be lightning fast.Now it's dead slow. I have tried upgrading the video card but that does not seem to be the problem. Also I found that there was a problem with the Dropbox uninstall, finally I replace it with pcmanfm which appears to be much faster but the down side is that I no longer have the gwibber social client and a lot of stuff don't work like they use to. Also I completely removed nautilus and couldn't even login to ubuntu to install again nautilus.How can I remove or repair nautilus, and use pcmanfm instead? I have a dell inspiron 1440 3gb ram / disk 300gb / Additionally, why does nautilus run fast when I run it as root? There are no USB devices attached to my computer. Thanks in advance

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  • How To Create a Portable USB Version of Microsoft Office Starter 2010

    - by Taylor Gibb
    Microsoft Office 2010 Starter edition is a free, ad-supported version of Office 2010 meant to be included on new PCs. It only includes Word and Excel with a subset of features—but it does let you make a portable version. Here’s how to do it. Note: The download link provided in the following article is not exactly a “Microsoft Approved” link and may stop working at any time. Still, the Starter version of Office is meant to be ad-supported freeware, and they haven’t pulled the download despite widespread use of it online. How to See What Web Sites Your Computer is Secretly Connecting To HTG Explains: When Do You Need to Update Your Drivers? How to Make the Kindle Fire Silk Browser *Actually* Fast!

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  • Download the Mountain Views from Romania Theme for Windows 7 and 8

    - by Asian Angel
    Are you ready to add some serene and beautiful mountain scenery to your desktop? Then you will definitely want to grab a copy of the Mountain Views from Romania Theme for Windows 7 and 8. The theme comes with five wonderful images from photographer Mihai Despan to add a peaceful mood to your favorite computer. Special Note: The photos in the theme do not contain the black strip shown in the image above. Those were ‘added’ during the image editing process for our post. Uncovering Artists Through Windows Themes – Mihai Despan [7 Tutorials] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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