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  • Virtual PC in Remote Desktop session runs very slowly??

    - by Michael Bray
    I have a VPN to my work which is quite fast... I Remote Desktop to my work PC, which is running a Microsoft Virtual PC. Working with the PC while I'm actually at work isn't too bad, but when I try to interact with it over the remote desktop, it is VERY slow to respond. Even simple typing can be slow, but screen painting and response time is painfully obvious. Any suggestions to help speed it up?

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  • I can't get through with my password on sudo, can anyone help me?

    - by Wellhellothere
    I know that the password doesn't show up on the screen that's all good. I just can't seem to get any further as I am typing my user password but this comes up: 2012-12-04 22:38:14.815 TextEdit[27507:4b0b] NSTrackPersistentURLs: LSSharedFileListInsertItemURL() failed at inserting URL file://localhost/etc/hosts (/etc/hosts) Why can't I use it? I don't really understand sudo but I do need to change some things around on my mac, can anyone help?

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  • SQL SERVER – Information Related to DATETIME and DATETIME2

    - by pinaldave
    I recently received interesting comment on the blog regarding workaround to overcome the precision issue while dealing with DATETIME and DATETIME2. I have written over this subject earlier over here. SQL SERVER – Difference Between GETDATE and SYSDATETIME SQL SERVER – Difference Between DATETIME and DATETIME2 – WITH GETDATE SQL SERVER – Difference Between DATETIME and DATETIME2 SQL Expert Jing Sheng Zhong has left following comment: The issue you found in SQL server new datetime type is related time source function precision. Folks have found the root reason of the problem – when data time values are converted (implicit or explicit) between different data type, which would lose some precision, so the result cannot match each other as thought. Here I would like to gave a work around solution to solve the problem which the developers met. -- Declare and loop DECLARE @Intveral INT, @CurDate DATETIMEOFFSET; CREATE TABLE #TimeTable (FirstDate DATETIME, LastDate DATETIME2, GlobalDate DATETIMEOFFSET) SET @Intveral = 10000 WHILE (@Intveral > 0) BEGIN ----SET @CurDate = SYSDATETIMEOFFSET(); -- higher precision for future use only SET @CurDate = TODATETIMEOFFSET(GETDATE(),DATEDIFF(N,GETUTCDATE(),GETDATE())); -- lower precision to match exited date process INSERT #TimeTable (FirstDate, LastDate, GlobalDate) VALUES (@CurDate, @CurDate, @CurDate) SET @Intveral = @Intveral - 1 END GO -- Distinct Values SELECT COUNT(DISTINCT FirstDate) D_DATETIME, COUNT(DISTINCT LastDate) D_DATETIME2, COUNT(DISTINCT GlobalDate) D_SYSGETDATE FROM #TimeTable GO -- Join SELECT DISTINCT a.FirstDate,b.LastDate, b.GlobalDate, CAST(b.GlobalDate AS DATETIME) GlobalDateASDateTime FROM #TimeTable a INNER JOIN #TimeTable b ON a.FirstDate = CAST(b.GlobalDate AS DATETIME) GO -- Select SELECT * FROM #TimeTable GO -- Clean up DROP TABLE #TimeTable GO If you read my blog SQL SERVER – Difference Between DATETIME and DATETIME2 you will notice that I have achieved the same using GETDATE(). Are you using DATETIME2 in your production environment? If yes, I am interested to know the use case. Reference: Pinal Dave (http://www.SQLAuthority.com) Filed under: Pinal Dave, SQL, SQL Authority, SQL DateTime, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Does Email Address Obfuscation Actually Prevent Spam?

    - by Jason Fitzpatrick
    Many people obfuscate their email addresses–typing out someguy (at) somedomain (dot) com, for example–to project themselves from SPAM bots. Do such obfuscation techniques actually work? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder?

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  • How to implement friction in a physics engine based on "Advanced Character Physics"

    - by paldepind
    I have implemented a physics engine based on the concepts in the classic text Advanced Character Physics by Thomas Jakobsen. Friction is only discussed very briefly in the article and Jakobsen himself notes how "other and better friction models than this could and should be implemented." Generally how could one implement a believable friction model on top of the concepts from the mentioned article? And how could the found friction be translated into rotation on a circle? I do not want this question to be about my specific implementation but about how to combine Jakobsens ideas with a great friction system more generally. But here is a live demo showing the current state of my engine which does not handle friction in any way: http://jsfiddle.net/Z7ECB/embedded/result/ Below is a picture showing and example on how collision detection could work in an engine based in the paper. In the Verlet integration the current and previous position is always stored. Based on these a new position is calculated. In every frame I calculate the distance between the circles and the lines. If this distance is less than a circles radius a collision has occurred and the circle is projected perpendicular out of the offending line according to the size of the overlap (offset on the picture). Velocity is implicit due to Verlet integration so changing position also changes the velocity. What I need to do know is to somehow determine the amount of friction on the circle and move it backwards parallel to the line in order to reduce its speed.

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  • Faq and Best tips Regarding Learning Database ?

    - by AdityaGameProgrammer
    For a programmer with no prior exposure to databases What would be a good database to learn Oracle vs SQLserver vs MySQLvs PostgreSQL? I have come across lot of discussion MySQL and PostgreSQL and frankly I am confused on which to start with. Are these very different, in the sense if one had to switch, would the exposure to one be counter-productive to learning the other? Is working with databases heavily platform dependent? What exactly do people mean by Data base programming vs. administration? Do people chose databases based on the programming language used for the application developed? In general, Working with databases is it implicit that we work with some server? Does the choice of databases differ when it comes to game development? If so what factors does it differ by? What are the Best Tips that you have found to be useful when learning databases Edit: Some FAQ i had and found the same on SO What should every developer know about databases? Which database if learning from scratch in 2010? For a beginner, is there much difference between MySQL and PostgreSQL What RDBMS should I learn/use? (MySql/SQL Server/Oracle etc.) To what extent should a developer learn database? How are database programmers different from other programmers? what kind of database are used in games?

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  • Python and Ruby in Tuxedo

    - by Maurice Gamanho
    With the release of SALT 11gR1, you can now develop Python/Ruby services/applications on Oracle Tuxedo platform. Python functions or Ruby classes can be invoked as Tuxedo services by other Tuxedo services or clients and, in addition, Python/Ruby applications can invoke existing Tuxedo services. SALT 11gR1 combines the proven scalability, reliability and performance of the Tuxedo runtime infrastructure with the agility provided by these dynamic scripting languages, providing a highly available and almost linearly scalable platform for Python and Ruby application development. Another benefit of developing Python and Ruby applications with Tuxedo is that services are SOA enabled from inception by virtue of Tuxedo's comprehensive integration options with J2EE app servers, mainframe applications, Web services, etc. Other interesting features are dynamic re-loading of scripts, where script changes are picked up automatically or when the administrator decides, and server-side typing, where Python functions and Ruby classes are given interfaces by way of the Tuxedo Metadata Repository. More information can be found on the Oracle SALT 11gR1 documentation page. See also SCA Python and Ruby Programming and Python and Ruby Data Type Mapping.

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  • Don’t learn SSDT, learn about your databases instead

    - by jamiet
    Last Thursday I presented my session “Introduction to SSDT” at the SQL Supper event held at the offices of 7 Digital (loved the samosas, guys). I did my usual spiel, tour of the IDE, connected development, declarative database development yadda yadda yadda… and at the end asked if there were any questions. One gentleman in attendance (sorry, can’t remember your name) raised his hand and stated that by attempting to evangelise all of the features I’d missed the single biggest benefit of SSDT, that it can tell you stuff about database that you didn’t already know. I realised that he was dead right. SSDT allows you to import your whole database schema into a new project and it will instantly give you a list of errors and/or warnings pertaining to the objects in your database. Invalid references (e.g a long-forgotten stored procedure that refers to a non-existent column), unnecessary 3-part naming, incorrect case usage, syntax errors…it’ll tell you about all of ‘em! Turn on static code analysis (this article shows you how) and you’ll learn even more such as any stored procedures that begin with “sp_”, WHERE clauses that will kill performance, use of @@IDENTITY instead of SCOPE_IDENTITY(), use of deprecated syntax, implicit casts etc…. the list goes on and on. I urge you to download and install SSDT (takes a few minutes, its free and you don’t need SQL Server or Visual Studio pre-installed), start a new project: right-click on your new project and import from your database: and see what happens: You may be surprised what you discover. Let me know in the comments below what results you get, total number of objects, number of errors/warnings, I’d be interested to know! @Jamiet

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  • How can I learn to effectively write Pythonic code?

    - by Matt Fenwick
    I'm tired of getting downvoted and/or semi-rude comments on my Python answers, saying things like "this isn't Pythonic" or "that's not the Python way of doing things". To clarify, I'm not tired of getting corrected and downvoted, and I'm not tired of being wrong: I'm tired of feeling like there's a whole field of Python that I know nothing about, and seems to be implicit knowledge of experienced Python programmers. Doing a google search for "Pythonic" reveals a wide range of interpretations. The wikipedia page says: A common neologism in the Python community is pythonic, which can have a wide range of meanings related to program style. To say that code is pythonic is to say that it uses Python idioms well, that it is natural or shows fluency in the language. Likewise, to say of an interface or language feature that it is pythonic is to say that it works well with Python idioms, that its use meshes well with the rest of the language. It also discusses the term "unpythonic": In contrast, a mark of unpythonic code is that it attempts to write C++ (or Lisp, Perl, or Java) code in Python—that is, provides a rough transcription rather than an idiomatic translation of forms from another language. The concept of pythonicity is tightly bound to Python's minimalist philosophy of readability and avoiding the "there's more than one way to do it" approach. Unreadable code or incomprehensible idioms are unpythonic. I suspect one way to learn the Pythonic way is just to program in Python a whole bunch. But I bet I could write a bunch of crap and not improve that much without some guidance, whereas a good resource might speed up the learning process significantly. PEP 8 might be exactly what I'm looking for, or maybe not. I'm not sure; on the one hand it covers a lot of ground, but on the other hand, I feel like it's more suited as a reference for knowledgeable programmers than a tutorial for fresh 'uns. How do I get my foot in the Pythonic/Python way of doing things door?

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  • How do I create a popup banner before login with Lightdm?

    - by Rich Loring
    When Ubuntu was using gnome I was able to create a popup banner like the banner below before the login screen using zenity in the /etc/gdm/Init/Default. The line of code would be like this: if [ -f "/usr/bin/zenity" ]; then /usr/bin/zenity --info --text="`cat /etc/issue`" --no-wrap; else xmessage -file /etc/issue -button ok -geometry 540X480; fi How can I accomplish this with Unity? NOTICE TO USERS This is a Federal computer system (and/or it is directly connected to a BNL local network system) and is the property of the United States Government. It is for authorized use only. Users (authorized or unauthorized) have no explicit or implicit expectation of privacy. Any or all uses of this system and all files on this system may be intercepted, monitored, recorded, copied, audited, inspected, and disclosed to authorized site, Department of Energy, and law enforcement personnel, as well as authorized officials of other agencies, both domestic and foreign. By using this system, the user consents to such interception, monitoring, recording, copying, auditing, inspection, and disclosure at the discretion of authorized site or Department of Energy personnel. Unauthorized or improper use of this system may result in administrative disciplinary action and civil and criminal penalties. By continuing to use this system you indicate your awareness of and consent to these terms and conditions of use. LOG OFF IMMEDIATELY if you do not agree to the conditions stated in this warning.

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  • We're Hiring! - Server and Desktop Virtualization Product Management

    - by adam.hawley
    There is a lot of exciting stuff going on here at Oracle in general but the server and desktop virtualization group in particular is deeply involved in executing on Oracle's strategy for delivering complete hardware-software solutions across the company, so we're expanding our team with several open positions. If you're interested and qualified, then please send us your resume. The three positions in Virtualization Product Management can be found by going here or going to the Employment Opportunities Job Search page, clicking on 'Advanced Search' and typing the job opening numbers (include 'IRC'... see below) in the 'Keywords' field. Click Search. Current openings are... IRC1457623: Oracle VM Product Management IRC1457626: Desktop Virtualization Application Solutions Product Management IRC1473577: Oracle VM Best Practices Implementation Engineer (Product Management) I look forward to hearing from you!

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  • What is the quickest way to indent a block of text with spaces for use within a web browser?

    - by ændrük
    I occasionally have the need to indent a block of text with spaces for use within a web browser, for example, when formatting a code block on this site or in a post on Launchpad. So far I've just done it by hand by copying four spaces to the clipboard and then mashing keys really fast: ?, Home, Ctrl+V (repeat) What is the quickest way to accomplish this? Copying and pasting to another program? (Which?) A Firefox or Chrome browser extension? A command to directly modify the clipboard contents? An auto-typing program?

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  • Add Firefox’s Awesome Bar Bookmark Search Function to Chrome and Iron

    - by Asian Angel
    Do you have a large number of bookmarks saved in your Chromium-based browser and need a quick way to search through them? Then see how easy it is to search through those bookmarks just like Firefox users do with the AwesomeBar extension. To engage the bookmark search function type “ab” in the Address Bar as seen above and press either Tab or the Space Bar. That will display the AwesomeBar prefix-bar as seen below. Enter the desired text to begin your search. For our example we decided to conduct a search for bookmarks related to the Ubuntu Twitter client Hotot. The results will continue to narrow down nicely as you type… Typing just a bit more finishes narrowing our search down the rest of the way for Hotot related items. Install the AwesomeBar Extension [Google Chrome Extensions] How to Enable Google Chrome’s Secret Gold IconHow to Create an Easy Pixel Art Avatar in Photoshop or GIMPInternet Explorer 9 Released: Here’s What You Need To Know

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  • How do I disable the touchpad using the upper left corner on an HP Pavilion dv6?

    - by William
    To disable the touchpad on an HP Pavilion dv6, you double tap on an area in the upper left hand corner of the touchpad. Then the blue indicator light around the border of the touchpad turns red, and the touchpad is disabled. Double tapping on this area again turns the touchpad turns back on. I do a lot of typing, and frequently bump the touchpad, messing up my work and annoying me. So, I would like to enable the ability to disable the touchpad by double-tapping on the area in the upper left hand corner. Unfortunately, there is no function key backup to disable the touchpad. This does not work in Ubuntu. I can turn it off using touchpad-indicator, but the program must be manually started and you have to disable using the key combination. Double-tapping the area is much easier. My computer is the HP Pavilion dv6-6135dx. Any help would be greatly appreciated.

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  • Problem with SLATEC routine usage with gfortran

    - by user39461
    I am trying to compute the Bessel function of the second kind (Bessel_y) using the SLATEC's Amos library available on Netlib. Here is the SLATEC code I use. Below I have pasted my test program that calls SLATEC routine CBESY. PROGRAM BESSELTEST IMPLICIT NONE REAL:: FNU INTEGER, PARAMETER :: N = 2, KODE = 1 COMPLEX,ALLOCATABLE :: CWRK (:), CY (:) COMPLEX:: Z, ci INTEGER :: NZ, IERR ALLOCATE(CWRK(N), CY(N)) ci = cmplx (0.0, 1.0) FNU = 0.0e0 Z = CMPLX(0.3e0, 0.4e0) CALL CBESY(Z, FNU, KODE, N, CY, NZ, CWRK, IERR) WRITE(*,*) 'CY: ', CY WRITE(*,*) 'IERR: ', IERR STOP END PROGRAM And here is the output of the above program: CY: ( 5.78591091E-39, 5.80327020E-39) ( 0.0000000 , 0.0000000 ) IERR: 4 Ierr = 4 meaning there is some problem with the input itself. To be precise, the IERR = 4 means the following as per the header info in CBESY.f file: ! IERR=4, CABS(Z) OR FNU+N-1 TOO LARGE - NO COMPUTA- ! TION BECAUSE OF COMPLETE LOSSES OF SIGNIFI- ! CANCE BY ARGUMENT REDUCTION Clearly, CABS(Z) (which is 0.50) or FNU + N - 1 (which is 1.0) are not too large but still the routine CBESY throws the error message number 4 as above. The CY array should have following values for the argument given in above code: CY(1) = -0.4983 + 0.6700i CY(2) = -1.0149 + 0.9485i These values are computed using Matlab. I can't figure out what's the problem when I call CBESY from SLATEC library. Any clues? Much thanks for the suggestions/help. PS: if it is of any help, I used gfortran to compile, link and then create the SLATEC library file ( the .a file ) which I keep in the same directory as my test program above. shell command to execute above code: gfortran -c BesselTest.f95 gfortran -o a *.o libslatec.a a GD.

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  • Problem while installing amd driver on ubuntu 12.10 on my dell inspiron 5520

    - by Arun
    I have a dell inspiron 5520 which has switchable graphics mode with amd radeon hd 7600m. I have recently installed ubuntu 12.10 alongside windows. But i can't install the driver for grahics card. While typing "sudo apt-get install fglrx-installer" it says unable to locate the package. While adding the repository ubuntu-x-swat/x-updates it shows error that "The requested URL /ubuntu-x-swat/x-updates/ubuntu/dists/quantal/main/binary- i386/Packages was not found on this server." In another attempt i download driver from amd-driver site, and then installing from terminal it shows that some errors come while installing and I get the blank screen only. So how to install the amd driver on my laptop.

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  • How to create a "shutdown user" or "shutdown account"

    - by pcapademic
    Red Hat had a feature useful to me at the present time. There was an account, generally called "shutdown", and when you logged in with the account, the system shut down. In my specific case, I have Ubuntu Server running in a VM on my local system. The VM is running a web app, and when I'm done doing work, I want to shut down the VM. Unfortunately, I can't install VMware tools to get the "power button" based shutdown. Currently I login then sudo shutdown -h now, then type my password again, and things shutdown. Really, it's getting annoying all that waiting around and typing things. How do I replicate the "shutdown account" functionality in Ubuntu? A related question, were there any security gotchas that motivated people to stop using this kind of account?

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  • KISS and Tell - MVVM and the ViewModelLocator

    - by Bobby Diaz
    A popular topic that comes up when talking about MVVM is the use of a ViewModelLocator and the many different ways one can be implemented.  Rather than getting into the pros and cons on when or why you should use it, I decided I would just post my version of a simple ViewModelLocator and let those who like it use it, and those who don’t, well you know…  :) First, a disclaimer.  I have not used this code in a production application, it is just something I was tossing around while reading others’ posts on the subject. 1. MainView.xaml   2. MainViewModel.cs 3. ViewModelLocator.cs   I have a codepaste of the ViewModelLocator.cs file if you are interested but don’t feel like re-typing the 50 lines of code! Enjoy! Additional Resources Simple ViewModel Locator for MVVM: The Patients Have Left the Asylum - by John Papa ViewModel binding with the Managed Extensibility Framework - by Jeremy Likness MVVM Light Toolkit - by Laurent Bugnion

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  • keyboard layout switching on restart

    - by zidarsk8
    I have two keyboard layouts that I use, My default keyboard is an USA layout, with a secondary Slovenian layout. I use the Slovenian layout only when I need some special characters when writing emails and such. But my problem is this: Every time I reboot my computer, the layout indicator shows I am on the USA layout, but the actual keyboard layout is Slovenian. Then I normally have to switch from USA to Slovenian and back, to get the layout I want. Is there anything I can do about this? I don't restart my computer often, but when I do I forget about that, and typing the passwords like that doesn't work.

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  • How to Print or Save a Directory Listing to a File

    - by Lori Kaufman
    Printing a directory listing is something you may not do often, but when you need to print a listing of a directory with a lot of files in it, you would rather not manually type the filenames. You may want to print a directory listing of your videos, music, ebooks, or other media. Or, someone at work may ask you for a list of test case files you have created for the software you’re developing, or a list of chapter files for the user guide, etc. If the list of files is small, writing it down or manually typing it out is not a problem. However, if you have a lot of files, automatically creating a directory listing would get the task done quickly and easily. This article shows you how to write a directory listing to a file using the command line and how to use a free tool to print or save a directory listing in Windows Explorer. Amazon’s New Kindle Fire Tablet: the How-To Geek Review HTG Explains: How Hackers Take Over Web Sites with SQL Injection / DDoS Use Your Android Phone to Comparison Shop: 4 Scanner Apps Reviewed

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  • Login screen restarts while entering password

    - by Shane L
    I am having a problem that only occurred after installing the fglrx proprietary driver through the additional drivers app. The exact same issue is described in this question, however it's closed. Must login twice before entering Unity; first login screen has graphical anomalies When I boot up my computer, once I get to lightdm login screen I will start typing my password, and upon the entering of two of my password characters "n2" the screen will start displaying some corruption in the very top edge of the screen, then after I hit the number 2, lightdm seems to crash and it will restart and everything is fine, I can login from that point. So the issue is, every time I reboot, I have to login once, allow lightdm to crash and restart, then login as normal. The issue did not occur prior to installing fglrx, and has happened through several reinstalls.

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  • Runaway version store in tempdb

    - by DavidWimbush
    Today was really a new one. I got back from a week off and found our main production server's tempdb had gone from its usual 200MB to 36GB. Ironically I spent Friday at the most excellent SQLBits VI and one of the sessions I attended was Christian Bolton talking about tempdb issues - including runaway tempdb databases. How just-in-time was that?! I looked into the file growth history and it looks like the problem started when my index maintenance job was chosen as the deadlock victim. (Funny how they almost make it sound like you've won something.) That left tempdb pretty big but for some reason it grew several more times. And since I'd left the file growth at the default 10% (aaargh!) the worse it got the worse it got. The last regrowth event was 2.6GB. Good job I've got Instant Initialization on. Since the Disk Usage report showed it was 99% unallocated I went into the Shrink Files dialogue which helpfully informed me the data file was 250MB.  I'm afraid I've got a life (allegedly) so I restarted the SQL Server service and then immediately ran a script to make the initial size bigger and change the file growth to a number of MB. The script complained that the size was smaller than the current size. Within seconds! WTF? Now I had to find out what was using so much of it. By using the DMV sys.dm_db_file_space_usage I found the problem was in the version store, and using the DMV sys.dm_db_task_space_usage and the Top Transactions by Age report I found that the culprit was a 3rd party database where I had turned on read_committed_snapshot and then not bothered to monitor things properly. Just because something has always worked before doesn't mean it will work in every future case. This application had an implicit transaction that had been running for over 2 hours.

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  • How do you KISS ?

    - by Conor
    The KISS principal is a highly quoted design mantra. The aim of this principle is to stamp out unnecessary complexity on a project. This is a good thing, saving time, energy and money. It can lead to a relatively stress free implementation and a simple, elegant, maintainable end product. A lot of discussion on KISS provides mechanisms to simplify requirements, design and implementation. Things that spring to mind include: avoid scope creep; simple obvious design and code; minimal run-time dependencies; refactoring to maintain simplicity; etc. However there are a lot of implicit things that we do to KISS. Examples: small team sizes; minimal management layers; tidy desk; mastery of a single IDE; clear concise error messages; scripts to automate/encapsulate tasks; etc The purpose of this question is to derive a checklist of KISS items. I'm especially interested in non-obvious items.

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  • How do I install pepper-flash on Chromium?

    - by user209900
    I have Chromium web browser on my Lubuntu 13.04 (pre-installed). I use LX Terminal (pre-installed) to write commands. I am trying to download flash player on Chromium using instructions on this site : sudo add-apt-repository ppa:skunk/pepper-flash After typing in my password, this worked. Now sudo apt-get update I didn't need to type in my password, as I continued on the same terminal, but got W:/ and E:/ fetch file errors sudo apt-get install pepflashplugin-installer I continued on the same terminal despite the fetch file errors... and they said pepflashplugin-installer could not be found. Is the last error because of fetch file errors, or because I need to download pepflash-plugin-installer somewhere? Or is it because of something else? I cannot download the Chrome browser, and not looking to use flash player on my Firefox web browser (installed using lubuntu software centre).

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