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  • What is a Histogram, and How Can I Use it to Improve My Photos?

    - by Eric Z Goodnight
    What’s with that weird graph with all the peaks and valleys? You’ve seen it when you open Photoshop or go to edit a camera raw file. But what is that weird thing called a histogram, and what does it mean? The histogram is one of the most important and powerful tools for the digital imagemaker. And with a few moments reading, you’ll understand a few simple rules can make you a much more powerful image editor, as well as helping you shoot better photographs in the first place. So what are you waiting for? Read on!  What is a Histogram, and How Can I Use it to Improve My Photos?How To Easily Access Your Home Network From Anywhere With DDNSHow To Recover After Your Email Password Is Compromised

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  • VirtualBox and Ubuntu Mount Error

    - by skaz
    I have Ubuntu 10 as the guest OS on a Windows 7 machine. I have been trying to setup shares through VirtualBox, but nothing is working. First, I create the share in VirtualBox and point it to a Windows folder. Then I try to mount the drive in Linux, but I keep getting /sbin/mount.vboxsf: mounting failed with the error: Protocol error I have read so many solutions to this, but none seem to work. I have tried: Using the mount.vboxsf syntax Reinstalling VBox additions Rebooting Enabling and trying as root account Any other ideas? In case I am doing something dumb, here are more details: I made a share called "Test" in VBox Shared folders. Then I made a directory in ubuntu named "test2". Then I tried to execute this command: sudo mount -t vboxsf Test /mnt/test2 Thank you!

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  • Google Chrome side by side stable beta unstable. How to approach?

    - by sobi3ch
    I have the stable version of Google Chrome on my box. And each time I'm trying to install beta or/and unstable versions then I run into the same problem: The following packages will be REMOVED google-chrome-stable The following NEW packages will be installed google-chrome-beta 0 upgraded, 1 newly installed, 1 to remove and 0 not upgraded. Need to get 34.5 MB of archives. After this operation, 3,109 kB of additional disk space will be used. Do you want to continue [Y/n]? I need to remove the first version before installing another. How can I install stable and beta (and maybe unstable as well) next to each other?

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  • Why don't 8.04 panel launchers work on 10.04

    - by Android Eve
    I copied my panel launchers verbatim from 8.04 to 10.04, residing in both systems in the same path: $HOME/.gnome2/panel2.d/default/launchers However, for some reason, they are not visible on 10.04's GNOME panel. Why? In my attempts to troubleshoot the problem I: Verified that copied 8.04 launchers have same permissions as manually created 10.04 launchers (-rwxr-xr-x). Added the first line as: #!/usr/bin/env xdg-open Logged off, then logged on. Rebooted. None of the above helped. So the question remains: Why? And how do I make them work?

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  • Confusion about Rotation matrices from Euler Angles

    - by xEnOn
    I am trying to learn more about Euler Angles so as to help myself in understanding how I can control my camera better in the game. I came across the following formula that converts Euler Angles to rotation matrices: In the equation, I could see that the first matrix from the left is the rotation matrix about x-axis, the second is about y-axis and the third is about z-axis. From my understanding about ordinary matrix transformations, the later transformation is always applied to the right hand side. And if I'm right about this, then the above equation should have a rotation order starting from rotating about z-axis, y-axis, then finally x-axis. But, from the symbols it seems that the rotation order start rotating about x-axis, then y-axis, then finally z-axis. What should the actual order of the rotation be? Also, I am confuse about if the input vector, in this case, would be a row vector on the left, or a column vector on the right?

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  • How do I start working as a programmer - what do I need?

    - by giorgo
    i am currently learning Java and PHP as I have some projects from university, which require me to apply both languages. Specifically, a Java GUI application, connecting to a MySQL database and a web application that will be implemented in PHP/MySQL. I have started learning the MVC pattern, Struts, Spring and I am also learning PHP with zend. My first question is: How can I find employment as a programmer/software engineer? The reason I ask is because I have sent my CV into many companys, but all of them stated that I required work experience. I really need some guidance on how to improve my career opportunites. At present, I work on my own and haven't worked in collaboration with anyone on a particular project. I'm assuming most people create projects and submit them along with their CVs. My second question is: Everyone has to make a start from somewhere, but what if this somewhere doesn't come? What do I need to do to create the circumstances where I can easily progress forward? Thanks

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  • Handle HTTPS Request in Proxy Server by C#

    - by Masoud Zohrabi
    I'm trying to write a Home Proxy Server in C# and I almost succeeded but I have problem to handle HTTPS requests (CONNECT). I don't know really how to handle this type of requests. In my studies I realized that for this requests we must to connect client to target host directly. Steps for these requests (that I realized): Receive first request from client (CONNECT https://www.example.ltd:443 HTTP/1.1) and send that to target host Send HTTP/1.1 200 Connection Established\r\n\r\n to client Listen to both sockets (client and target host) and send receives from each other to each other Listen until one of sockets disconnected Is this correct? If it is, how?

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  • Build an ASP.NET 3.5 Guestbook using MS SQL Server and VB.NET

    One of the most important website features is a guest book. This is particularly useful if you need to know the responses and reactions of your website s visitors. With the release of ASP.NET 3.5 and Visual Web Developer Express 2 8 several web controls make it possible to create an ASP.NET application without the need to hard manually code everything including database scripts server side scripts etc. You can see how that would be helpful to writing a guest book. This is the first part of a multi-part series.... SW Deployment Automation Best Practices Free Guide for IT Leaders: Overcoming Software Distribution & Mgmt Challenges.

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  • How to Remotely Shut Down or Restart Windows PCs

    - by Chris Hoffman
    Windows includes Shutdown.exe, a simple utility for remotely shutting down or restarting Windows computers on your local network. To use Shutdown.exe, you must first configure the PCs you want to shut down or restart remotely. Once you’ve configured the PCs, you can use a graphical user interface or command to restart the PCs from another Windows system. You can even remotely shut down or restart the PCs from a Linux system. How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume Make Your Own Windows 8 Start Button with Zero Memory Usage

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  • How to save one role implementing a client/server pattern in Azure?

    - by Alfredo Delsors
    Sometimes you need to have an instance performing a server role when other instances are playing the client role. An example can be a file sharing like in this great post: http://blogs.msdn.com/b/mariok/archive/2011/02/11/sharing-folders-in-azure.aspx, one instance shares a folder that all other instances are using to write files that the server processes. The problem is that there is not discovering mechanism in Azure that allows one instance to know where the instance acting as a server is located. A first approach can be having a server role and a client role like in the previous post. This means more instances, more money. A solution to save this "server" role is to use Instance 0, always available, to act as a server. An instance can know that it should act as the server checking RoleEnvironment.CurrentRoleInstance.Id.EndsWith(".0"). Other instances can iterate the RoleEnvironment Instances collection to find the instance whose name ends with ".0", getting its endpoints and acting as its clients.

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  • Bring the Windows 8 'Start Menu' back!

    - by ihaynes
    I've been using the the Windows 8 RTM from MSDN for a week but the more of my normal software I load onto the machine the more awkward it becomes using the new 'Metro' (yes I know that name is now not used) 'Start' screen. Yes, you can oraganise your programs in groups, or you can add them to the Quick Launch bar, or you can create alphabetic folders on the desktop but sorry Microsoft, none of these are as logical as the alphabetic Start menu of previous Windows versions.Fortunately the good people at Stardock have a solution in 'Start8', which brings the Start Menu we know and love back to Windows 8. It's still in Beta and the current one runs out in October. I'm looking forward to the final release and like lots of other users, I'll be happy to pay for this.Lets hope Microsoft either reinstate the Start Menu in the first service pack or gives us a usable alternative. In the meantime, here's an excellent solution.http://www.stardock.com/products/start8/

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  • Bzr to git migration

    - by Sardathrion
    I am planning to do two things on several large (several gigs) and old (several years) repositories: Move from bzr to git without losing the commit history. Restructure all the repositories either using bzr or git. This will involve moving files/directories from one repository to another with its change history. Doing both at once would be foolish (I think!) but I am not sure which one should be done first. Any suggestions? Anything I should watch out for when migrating/restructuring?

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  • Split a partition with GParted

    - by Eray
    These are my current disk partitions. /yedek is for some personal backup files. As you can see there is only Ubuntu on my PC. I will install Windows, too. Because of this I want to shrink /dev/sda3 . It currently 546GB and I want to split it: 300GB for / and 246GB for Windows (NTFS) is OK for me. I'm using GParted for the first time. How can I shrink /? I don't want to lose any datas from Ubuntu.

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  • How do I get the Grub menu back after installing Windows on a separate disk?

    - by Shazzner
    Tried sudo grub-install on sda1 but it complained about being a BAD IDEA. I had to install windows for a work related issue so I used a separate disk (I had used it for ubuntu on this computer, but bought a bigger disk so installed ubuntu on that and left the old one in in case I needed an old file). Windows installed fine but overwrote Grub. So if I choose the Ubuntu disk to boot first in BIOS I get a blank screen. I googled and followed this advice: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows However, when I get down to this section: sudo grub-install --root-directory=/media/0d104aff-ec8c-44c8-b811-92b993823444 /dev/sda1 I get this: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea… --recheck does nothing. Any ideas?

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  • PeopleSoft Mobile Company Directory

    - by Nancy Estell Zoder
    Oracle is pleased to announce the posting of our latest feature, Mobile Company Directory (click here for press release).  Our continued investment in innovation is demonstrated with the first release of our mobile solution. Now, from your tablet or smartphone, the PeopleSoft 9.1 Company Directory feature enables you to search for people, obtain contact details, reporting structure and personal information. The PeopleSoft Mobile solution enables you to email people in your organization, make phone calls as well as send text messages.   Both the tablet and smart phone provide quick and easy access to contact information to allow users to directly communicate with people in the organization while on the go.  Watch the Video Feature Overview on YouTube here:   PeopleSoft Mobile Company Directory For more information, please check out the datasheet available on oracle.com or contact your sales representative.   

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  • Would security be comprimised if I install a gui (e.g. zPanel) for LAMP?

    - by Kirk
    I am an Ubuntu/Linux noob. There are many questions I have regarding the use of my system as a server. First and foremost is security. I want to install a simple GUI (zPanel appears the most user friendly) that will allow others to log into the server and database with ease, similar to a hosting service, though my intent is for the development of one site. Upon looking at the instructions of numerous GUI's, they require installation as root. This makes me uneasy, as my thoughts spiral to the possibilities of the developers creating the elusive 'back-door', thereby giving them root access to my entire system. Am I just being paranoid or is that theoretically possible? If it is possible, what steps are necessary to ensure security?

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  • 3D Texture Mapping (Atlas)

    - by Tim Hatch
    This is a pretty simple question. If I was to use multiple images in a single texture for a 3D cube, how would I go about re-using each vertex (having 8 total vs 24)? With a single buffer of 8 vertices, I don't see how I'd properly reuse the UV values. Any help on that? I know it's not terribly clear, but I figured it was a simple question. The 2D method is pretty easy, the next coordinates would be the same as the first (0,0 and 0,1 respectively). However, the above 3D version has me quite befuddled.

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  • Why are interfaces useful?

    - by Pankaj Upadhyay
    I have been studying and coding in C# for some time now. But still, I can't figure the usefulness of Interfaces. They bring too little to the table. Other than providing the signatures of function, they do nothing. If I can remember the names and signature of the functions which are needed to be implemented, there is no need for them. They are there just to make sure that the said functions(in the interface) are implemented in the inheriting class. C# is a great language, but sometimes it gives you the feeling that first Microsoft creates the problem (not allowing multiple inheritance) and then provides the solution, which is rather a tedious one. That's my understanding which is based on limited coding experience. What's your take on interfaces? How often you make uses of them and what makes you do so?

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  • How do you break down a new project with an existing mega PHP site?

    - by Caveatrob
    I've got to dive into a very large PHP site and have my first client meeting today. All they gave me so far was the URL. How do you guys go about gathering/structuring/documenting and preparing for a new project in a PHP environment? What things do you ask for up front? PS - I know there are other general questions about this but I want a PHP-flavored one, including tools (even if universal) and approaches. Thanks!! I'm excited but also scared.

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  • Install a Mirror without downloading all packages from official repository

    - by Sam
    I first gonna explain the situation: I have a Laptop which is connected to a wifi connection, and a Desktop which can not be connected to Internet (the modem is too far from it), and i want to install some software on the last one. (The two PCs are running Ubuntu 12.04, and are connected with an Ethernet cable) I've already searched for a solution, but all I've found was the use of some softwares that should have been already installed on the "Internet-less PC". ( Keryx, APTonCD ... ) What I want to do is to create a mirror in my laptop which contain the packages i have in this one ( situated in /var/cache/apt/archive ) and i don't want to download all the packages from the official repository, I actually don't need them. Can someone tell me if it is possible to do that ? Thanks,

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  • Windows Phone 8 Announcement

    - by Tim Murphy
    As if the Surface announcement on Monday wasn’t exciting enough, today Microsoft announce that Windows Phone 8 will be coming this fall.  That itself is great news, but the features coming were like confetti flying in all different directions.  Given this speed I couldn’t capture every feature they covered.  A summary of what I did capture is listed below starting with their eight main features. Common Core The first thing that they covered is that Windows Phone 8 will share a core OS with Windows 8.  It will also run natively on multiple cores.  They mentioned that they have run it on up to 64 cores to this point.  The phones as you might expect will at least start as dual core.  If you remember there were metrics saying that Windows Phone 7 performed operations faster on a single core than other platforms did with dual cores.  The metrics they showed here indicate that Windows Phone 8 runs faster on comparable dual core hardware than other platforms. New Screen Resolutions Screen resolution has never been an issue for me, but it has been a criticism of Windows Phone 7 in the media.  Windows Phone 8 will supports three screen resolutions: WVGA 800 x 480, WXGA 1280 x 768, and 720 1280x720.  Hopefully this makes pixel counters a little happier. MicroSD Support This was one of my pet peeves when I got my Samsung Focus. With Windows Phone 8 the operating system will support adding MicroSD cards after initial setup.  Of course this is dependent on the hardware company on implementing it, but I think we have seen that even feature phone manufacturers have not had a problem supporting this in the past. NFC NFC has been an anticipated feature for some time.  What Microsoft showed today included the fact that they didn’t just want it to be for the phone.  There is cross platform NFC functionality between Windows Phone 8 and Windows 8.  The demos , while possibly a bit fanciful, showed would could be achieved even in a retail environment.  We are getting closer and closer to a Minority Report world with these technologies. Wallet Windows Phone 8 isn’t the first platform to have a wallet concept.  What they have done to differentiate themselves is to make it sot that it is not dependent on a SIM type chip like other platforms.  They have also expanded the concept beyond just banks to other types of credits such as airline miles. Nokia Mapping People have been envious of the Lumia phones having the Nokia mapping software.  Now all Windows Phone 8 devices will use NavTeq data and will have the capability to run in an offline fashion.  This is a major step forward from the Bing “touch for the next turn” maps. IT Administration The lack of features for enterprise administration and deployment was a complaint even before the Windows Phone 7 was released.  With the Windows Phone 8 release such features as Bitlocker and Secure boot will be baked into the OS. We will also have the ability to privately sign and distribute applications. Changing Start Screen Joe Belfiore made a big deal about this aspect of the new release.  Users will have more color themes available to them and the live tiles will be highly customizable. You will have the ability to resize and organize the tiles in a more dynamic way.  This allows for less important tiles or ones with less information to be made smaller.  And There Is More So what other tidbits came out of the presentation?  Later this summer the API for WP8 will be available.  There will be developer events coming to a city near you.  Another announcement of interest to developers is the ability to write applications at a native code level.  This is a boon for game developers and those who need highly efficient applications. As a topper on the cake there was mention of in app payment. On the consumer side we also found out that all updates will be available over the air.  Along with this came the fact that Microsoft will support all devices with updates for at least 18 month and you will be able to subscribe for early updates.  Update coming for Windows Phone 7.5 customers to WP7.8.  The main enhancement will be the new live tile features.  The big bonus is that the update will bypass the carriers.  I would assume though that you will be brought up to date with all previous patches that your carrier may not have released. There is so much more, but that is enough for one post.  Needless to say, EXCITING! del.icio.us Tags: Windows Phone 8,WP8,Windows Phone 7,WP7,Announcements,Microsoft

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  • Black screen after installing Ubuntu 11.10

    - by Abbas
    I downloaded Ubuntu 11.10 one week ago and burned it to a CD. I installed it on my system which has a 1.5 TB hard. It installed successfully and I clicked on the restart button. The computer restarted and I chose the first option, which was to load Ubuntu. A black screen would appear with a cursor in top left hand side and I think the system was hung. I repeated this process by erasing the last Ubuntu install but I faced a similar problem. Can anybody help me?

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  • Xamarin Wins Funding, Microsoft Builds Repair Tool

    Let's focus on the Xamarin news first. Xamarin is a young company with a phoenix-like history. Founded in May of 2011 by Miguel de Icaza and the rest of the team that created Mono, Xamarin got its start, effectively, as Ximian (de Icaza's previous company). Ximian was founded way back in 1999, and created Mono, which TechCrunch describes as an open source project that brings Microsoft's .NET development framework to non-Microsoft operating systems like Android, iOS and Linux. Novell acquired Ximian inn 2003, and continued to fund Mono's development. But apparently, when Attachmate bought No...

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  • How quickly does the Java language get outdated?

    - by Dummy Derp
    I started learning Java recently. I started learning it using books that I picked up from the library, some that I bought, and here and there from Java documentation. The book that I use for Java was published in the year 2011. In 2012, Java8 will be released followed by Java9 in the year 2013. The questions are: How do I keep myself updated about developments in Java without having to buy a tome for Java8 and/or Java9 Is a book published in 2008 an outdated book for studying JSP and Servelets? I'm talking about Head First Servlets and JSP

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  • Skype on 12.04 x64 does not start even after purging and reinstalling it

    - by Zevaka
    I am wondering if there's anyone here who managed to use Skype on 12.04. It used to work (ever since I first tried Ubuntu 10.04) flawlessly, but after upgrading to 12.04, it just doesn't start. If I start Skype from terminal, it just says Segmentation fault (core dumped). I tried to remove Skype and installed it from different locations: Skype website (did not install at all, "package error") From official Ubuntu repository (doesn't start at all, segmentation fault) From repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner" (doesn't start at all, segmentation fault) Interesting thing: even if I remove / purge Skype from the system, it still shows up in Unity menu (of course doesn't start). Any help here?

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