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  • Algorithm for calculating indefinite integrals

    - by mbac32768
    Suppose I have an integral that's bounded on one (or both) ends by (-)infinity. AFAICT, I can't analytically solve this problem, it takes brute force (e.g. using a Left Riemann Sum). I'm having trouble generalizing the algorithm so that it sets the proper subdivisions; I'll either do far too much work to calculate something trivial, or not do nearly enough and have huge aliasing errors. Answering in any language is cool, but maybe someone with better google-fu can end this quickly. :) Is what I'm looking for as impossible as trying to measure the British coastline?

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  • Indefinite loops where the first time is different

    - by George T
    This isn't a serious problem or anything someone has asked me to do, just a seemingly simple thing that I came up with as a mental exercise but has stumped me and which I feel that I should know the answer to already. There may be a duplicate but I didn't manage to find one. Suppose that someone asked you to write a piece of code that asks the user to enter a number and, every time the number they entered is not zero, says "Error" and asks again. When they enter zero it stops. In other words, the code keeps asking for a number and repeats until zero is entered. In each iteration except the first one it also prints "Error". The simplest way I can think of to do that would be something like the folloing pseudocode: int number = 0; do { if(number != 0) { print("Error"); } print("Enter number"); number = getInput(); }while(number != 0); While that does what it's supposed to, I personally don't like that there's repeating code (you test number != 0 twice) -something that should generally be avoided. One way to avoid this would be something like this: int number = 0; while(true) { print("Enter number"); number = getInput(); if(number == 0) { break; } else { print("Error"); } } But what I don't like in this one is "while(true)", another thing to avoid. The only other way I can think of includes one more thing to avoid: labels and gotos: int number = 0; goto question; error: print("Error"); question: print("Enter number"); number = getInput(); if(number != 0) { goto error; } Another solution would be to have an extra variable to test whether you should say "Error" or not but this is wasted memory. Is there a way to do this without doing something that's generally thought of as a bad practice (repeating code, a theoretically endless loop or the use of goto)? I understand that something like this would never be complex enough that the first way would be a problem (you'd generally call a function to validate input) but I'm curious to know if there's a way I haven't thought of.

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  • Indefinite hang when restoring SQL 2005 database on a SQL 2008 server in EC2

    - by erinloy
    I'm trying to restore a 25 GB database backup taken from a Windows 2003/SQL 2005 machine to a Windows 2008/SQL 2008 machine in the Amazon EC2 cloud, using a .bak file and the SQL Management Studio. SQL Management Studio reports the restore reaches 100% complete, and then just hangs indefinitely (24+ hours) using a lot of CPU, until I restart the SQL Server service. Upon restart, SQL again uses a lot of CPU activity for what seems to be an indefinite amount of time, but the DB never comes online. Here are some details: - I have created two EBS volumes, one for DATA and one for LOGS, and I have set the default directories in SQL Server to the \DATA and \LOG directory on these respective volumes. (I wonder if the issue could be related to this, but the DB is too big to restore on the root drive.) - I have given the SQL Server user group full access to these directories. - The server can create a new empty test DB in these directories just fine, and can backup and restore the test DB. - I have tried both restoring of a .bak file and attaching directly to copies of the original .mdf/.ldf files, and the result is the same in both cases. - Both the .bak restore and the .mdf/.ldf attach occur from/to the EBS volumes. - I've also tried the above via SQL script, and "WITH RECOVERY", with no difference in the result, just less UI. - The backup contains two full text indexes. - I have to use "WITH MOVE" for most of the files in the backup. - There's nothing wrong with the backup or .mdf/.ldf files, as this works just fine on a Windows 2003/SQL 2005 machine in the Amazon EC2, but not Windows 2008/SQL 2008. - The DB is NOT marked as "Restoring" in the SQL Management Studio - it is just listed as a normal database, but throws errors when I try to do anything with it (expand the object browser tree, view properties, etc.) Any ideas?

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  • library to determine indefinite article of a noun

    - by Andrew Bullock
    Are there any libraries for .NET that deal with determining the Indefinite Article of a noun? My crude attempt is below, which will probably work for 99% of my usage (which is acceptable) just wondering if there are any established alternatives? public static string GetIndefinateArticle(string noun) { if(string.IsNullOrEmpty(self)) return self; var first = noun[0]; if(first == 'a' || first == 'e' || first == 'i' || first == 'o') return "a " + self; return "an " + self; }

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  • PHP - MySQL - Select runs indefinitely

    - by John
    I have three tables listings: id, pid, beds, baths, etc, etc, etc, db locations: id, pid, zip, lat, lon, etc, etc, etc, db images id, pid, height, width, raw, etc, etc, db id, pid & db are indexed. db just references the mls provider a particular item came from. in images the raw column holds raw image data there are about 15k rows in listings/locations, and about 120k rows in images so there are multiple rows that have the same pid. when i do "select pid from listings" or "select pid from locations" the query completes successfully in about 100ms. when i do "select pid from images" it just hangs in sqlyog and never completes... i was thinking since the raw column contains alot of information that it might be trying to select that too, but my query doesn't try to select that so I can't imagine why it's taking so long... any idea why this is happening??

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  • How to change the color of a indefinite ProgressBar?

    - by Janusz
    I have a progressbar with the following style: style="?android:attr/android:progressBarStyleSmall" Sadly the bar is nearly white and in my case displayed on a white background. The progressbar is nearly invisible because of that. How can I change the color of the progressbar? A darker grey would be great.

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  • The premier support for Sun Cluster 3.1 ended

    - by JuergenS
    In October 2011 the premier support for Sun Cluster 3.1 ended. See details in Oracle Lifetime Support Policy for Oracle and Sun System Software document. There no 'Extended Support' and the 'Sustaining Support Ends' is indefinite. But for indefinite 'Sustaining Support' I like to point out from the mentioned document (version Sept. 2011) on page 5: Sustaining Support does NOT include: * New program updates, fixes, security alerts, general maintenance releases, selected functionality releases and documentation updates or upgrade tools * Certification with most new third-party products/versions and most new Oracle products * 24 hour commitment and response guidelines for Severity 1 service requests *Previously released fixes or updates that Oracle no longer supports This means Solaris 10 9/10 update9 is the last qualified release for Sun Cluster 3.1. So, Sun Cluster 3.1 is not qualified on Solaris 10 8/11 Update10. Furthermore there is an issue around with SVM patch 145899-06 or higher. This SVM patch is part of Solaris 10 8/11 Update10. The 145899-06 is the first released patch of this number, therefore the support for Sun Cluster 3.1 ends with the previous SVM patches 144622-01 and 139967-02. For details about the known problem with SVM patch 145899-06 please refer to doc 1378828.1. Further this means you should freeze (no patching, no upgrade) your Sun Cluster 3.1 configuration not later than Solaris 10 9/10 update9. Or even better plan an upgrade to Solaris Cluster 3.3 now to get back to full support.

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  • Advanced cell selection in Excel

    - by Supuhstar
    I am new to this flavor of StackExchange, so if this belongs elsewhere, please move it; I figured this would be the best place, though. I am making an Excel Worksheet that simply stores basic financial data in 5 columns (Check Number, Date of Transaction, Description, Profit from Transaction, and Balance After Transaction) and indefinite rows. Each worksheet represents one month, and each Workbook represents a year. As I make or receive a payment, I store it as a new row, which, inherently, makes the number of rows per month indefinite. Each transaction's Balance cell is the sum of the Balance cell of the row above it and the Profit cell of its row. I want each month to start off with a special row (first one after column headers) that displays a summary of the last month's transactions. For instance, the Balance After Transaction cell would display the last row's balance, and the Profit from Transaction cell would display the overall profits of the month) I know that if I knew every month had exactly 100 expenses, I could achieve this for March with the following formulas for profit and balance, respectively: =February!E2 - February!E102 =February!E102 However, I do NOT know how many rows will be in each month's table, and I'd like to automate this as much as possible (for instance, if I find a missed or duplicated expense in January, I don't want to have to update all the formulas that point to the ending January balance). How can I have Excel automatically use the last entered value in a column, in any given Excel spreadsheet, in a formula?

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  • MySQL server with website hosting with managed hosting

    - by BlackSheep
    I work for a small business, and I am the "IT Department". I also happen to be a summer intern, so after I leave the number of IT staff will be 0 for an indefinite period of time. I need a place where I can reliably put up the company's website as well as the mySQL+PHP backend. Good redundancy is a plus, as well as easy administration for my IT-challenged colleagues. Managed hosting would be good, so the PHP versions can update without my company having to hire an admin. EDIT: The company already has a mySQL+PHP server running locally which hosts the existing website. My assignment is to find a remote server where the latest versions of mySQL+PHP will be maintained and where there is a very small chance of unintended downtime. Can you recommend anything?

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  • Purple Screen then Black Screen while Booting from CD or Windows Install

    - by Tyler
    Whenever I try to run Ubuntu from my internal CD drive, I see this screen minus the Ubuntu Text: Then the screen goes black, not even the internal light stays on. Sometimes it restarts itself, other times the black screen is indefinite until I restart the laptop myself. I'm on an HP Quad-Core AMD A8-3500M APU with 8 GB RAM and a Radeon AMD 6620g Discrete-Graphics Card. (HP dv6-6145dx) This is my first time using Linux, I am not too technically-inclined so any simplification would be welcomed. I am good at following technical instructions though which is how I was able to partition my hard drive and change the boot order to allow the internal CD drive first. Thanks in advance!

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  • Ubuntu One isn't syncing in Windows 7

    - by tuxtu
    Ubuntu One was working just fine in friend's computer on Windows 7. Problem is that, suddenly it has stopped syncing. I want to share some observation regarding this problem. Hope this could be helpful to solve the problem. If I upload any file directly on web (using browser), the amount of file size (KB/GB) changed in both places, Web dashboard and Ubuntu One control panel on Windows 7, but I can't find the file on PC. "File sync in progress" hangs on the U1 control panel on windows for indefinite time. If I keep any file in the U1 synced folder, that's not available on the PC and the total amount of file size isn't changed anywhere. "File sync in progress" dialogue is always there, since the starting of the PC. User using the PC with administrative previlage. Hope this problem will be solved quickly.

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  • Sharepoint site continuously propmting for username and password

    - by Priya
    Hi, A particular sharepoint web application(site collection) is continuously prompting for username and password indefinite times and not letting the users to view the application properly. But when we add the users to Farm Administrators, the web application(site collection) is working fine. But ideally, we can’t add all users to Farm Administrators. Please help me in resolving this issue. Regards, Priya

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  • How to version control data stored in mysql

    - by Shawn
    I'm trying to use a simple mysql database but tweak it so that every field is backed up up to an indefinite number of versions. The best way I can illustrate this is by replacing each and every field of every table with a stack of all the values this field has ever had (each of these values should be timestamped). I guess it's kind of like having customized version control for all my data.. Any ideas on how to do this?

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  • Weird graphical artefacts on OS X Snow Leopard.

    - by Debilski
    Since a couple of days I experience some strange graphical artefacts on Snow Leopard. Usually after a certain uptime, the background image would show some strange colours at some place. This could be reverted by reloading the background image. But the problem would appear again after rebooting (and waiting for an indefinite time). Sometimes, the shadow of windows would also have some artefacts; and this time the application switcher is completely distorted. Any ideas where I need to search for a solution of the problem? Edit: Model: MacBook Gen. 3.1 / all updates installed Update: After not having used Safari for a while, the problem has not occurred anymore (at least not after 20 days of uptime). Could well be that the problem had its origin in Safari or a Safari-related plugin. (Possibly Flash or Click-to-Flash as it did not happen with both deactivated, though the running time with this configuration might have been to short to be of any validity.)

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  • Tool for purging unneeded backups

    - by Dana the Sane
    I'm in the common situation where the one of the linux servers I use for storing backups is filling up. I'm wondering what tools are available for doing this. Ideally, what I would like is something that keeps nightlies for the previous month, weeklies for the 2nd to 5th preceding months and retains monthlies (well, every 3rd week) for an indefinite period. Everything that falls outside of that would be deleted after the backups are run. I could write a script to do this, but I feel like there must be a standard tool for this task.

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  • Recent update killed unity 3d launcher

    - by Steve
    I am scratching my head on this one, a lot of things are still new to me. I updated 126 packages just now through the update manager, and upon reboot everything works fine except the unity launcher. It's just a dark space. The dash still works, as does the top panel and docky. When I try: unity --replace I end up with this and then an indefinite hang: (compiz:3689): GConf-CRITICAL **: gconf_client_add_dir: assertion `gconf_valid_key (dirname, NULL)' failed WARN 2012-09-23 02:18:29 unity.favorites FavoriteStoreGSettings.cpp:139 Unable to load GDesktopAppInfo for 'ubiquity-gtkui.desktop' WARN 2012-09-23 02:18:30 unity.favorites FavoriteStoreGSettings.cpp:139 Unable to load GDesktopAppInfo for 'ubuntuone-installer.desktop' ERROR 2012-09-23 02:18:30 unity.launcher.trashlaunchericon TrashLauncherIcon.cpp:62 Could not create file monitor for trash uri: Operation not supported Initializing unityshell options...done WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-writer.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-calc.desktop' is using a deprecated format for its actions that will be dropped soon. WARN 2012-09-23 02:18:31 unity.libindicator <unknown>:0 Desktop file '/usr/share/applications/libreoffice-impress.desktop' is using a deprecated format for its actions that will be dropped soon. Setting Update "main_menu_key" Setting Update "run_key" Unfortunately I cannot make heads or tails of this. Anyone, please help?

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  • Recent 12.04 Upgrade Makes My System and Internet Run Extremely SLOW!

    - by Sterling
    I'm running a Dell Inspiron 1564 with Windows7/Ubuntu dual booting. I haven't logged into the Ubuntu OS partition for some time until recently (trying to force myself into a Linux environment to learn) and when I did, It asked me to upgrade to 12.04 and so I did, restarted and since, everything seems to run extremely slow (startup, opening applications, running applications, switching windows, etc., etc... Another thing is that the Internet cuts out intermittently on my browser. Some pages within my Firefox tabs I can access, some I cant. Almost always while running Skype or some other Internet using application. So I know that I'm getting Internet, I can chat with friends over Skype but certain pages wont load during my Skype calls; the pages just hang upon resfreshing... I can eventually get the page to load after an indefinite amount of waiting and refreshing but this is very annoying. I am extremely new to Linux so I apologize in advance for my absolute ignorance. I am willing to post whatever information you Linux gurus have me type into the terminal in hopes that you can help me =) Thanks in advance!

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  • How do I install the latest version of Mupen64?

    - by Uikri
    Alright, I can't figure out how to install Mupen64 on Ubuntu 12.04. I'm gonna be moving in ~2 days with no internet connection for an indefinite amount of time, so that's why I'm asking for answers here instead of figuring it out myself (I don't have time right now to sit and fiddle with figuring out emulators). I'd like to know how to properly install the latest version of Mupen64 (Stable. No beta or anything like that) and how to be able to use a controller with it. I've heard rumor that the latest version of M64 no longer has a GUI, but that there are ways to add a GUI to it after installation, so I'd also like to know how to add the Mupen64Py UI to it. I am not totally Ubuntu savvy. I do not know how to compile stuff from source, I don't necessarily know a lot of terminology, I'm not very handy with the terminal, etc. So it would be helpful if you explain each step in an easy to understand manner. Thanks in advance to anybody who helps out. EDIT: I've already seen How do I install mupen64plus?, just so you guys know. I just need instructions that are more detailed. Also, thanks for the edit, Jorge Castro! I guess I really should have properly formatted my question ^^;

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  • Ignoring 'A' and 'The' when sorting with XSLT

    - by ChrisV
    I would like to have a list sorted ignoring any initial definite/indefinite articles 'the' and 'a'. For instance: The Comedy of Errors Hamlet A Midsummer Night's Dream Twelfth Night The Winter's Tale I think perhaps in XSLT 2.0 this could be achieved along the lines of: <xsl:template match="/"> <xsl:for-each select="play"/> <xsl:sort select="if (starts-with(title, 'A ')) then substring(title, 2) else if (starts-with(title, 'The ')) then substring(title, 4) else title"/> <p><xsl:value-of select="title"/></p> </xsl:for-each> </xsl:template> However, I want to use in-browser processing, so have to use XSLT 1.0. Is there any way to achieve this in XLST 1.0?

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  • Relation between TCP/IP Keep Alive and HTTP Keep Alive timeout values

    - by Suresh Kumar
    I am trying to understand the relation between TCP/IP and HTTP timeout values. Are these two timeout values different or same? Most Web servers allow users to set the HTTP Keep Alive timeout value through some configuration. How is this value used by the Web servers? is this value just set on the underlying TCP/IP socket i.e is the HTTP Keep Alive timeout and TCP/IP Keep Alive Timeout same? or are they treated differently? My understanding is (maybe incorrect): The Web server uses the default timeout on the underlying TCP socket (i.e. indefinite) and creates Worker thread that counts down the specified HTTP timeout interval. When the Worker thread hits zero, it closes the connection.

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  • Neon toolkit and Gate Web Service

    - by blueomega
    I am trying to run any of the services from gate web service, in neon 2.3. Even Annie that runs so well in gate doesn't run, or better, it stay for indefinite time processing, a thing that should take no more than a couple of seconds. I run wizard, set input directory, leave file pattern as default and set a folder and name for the output ontology, shouldn't it be enough? Shouldn't i get something, even an error? I think its the location who's giving me problems. http://safekeeper1.dcs.shef.ac.uk/neon/services/sardine http://safekeeper1.dcs.shef.ac.uk/neon/services/sprat http://safekeeper1.dcs.shef.ac.uk/neon/services/annie http://safekeeper1.dcs.shef.ac.uk/neon/services/termraider How can i confirm it? Can i run it offline? Can anyone give me a hand? Also, i've seen sprat running on gate, on "SPRAT: a tool for automatic semantic pattern-based ontology population" Can anyone teach me how, and with what versions? Thx, Celso Costa

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  • Automation of testing using JUnit

    - by Vijay Selvaraj
    Hi, i am trying to automate manual testing of modules in my project. We are dealing with IBM Websphere Message queue software. We have a trigger component written in core java which when executed polls for availability of message in the configured queue. Its an indefinite while loop that keeps the trigger component running. I have written test cases in JUnit to put message in the queue and now will i be able to start/stop the trigger component on demand? Invoking the trigger component keeps it running and i am not getting the control back to check the expected output. If i start it in thread then the log files to which the trigger component is supposed to update when processing the message is not getting updated. How can i resolve this situation. Your suggestion and directions is highly appreciated. Thanks, -Vijay

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