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• (Possibly) Corrupted DDCrypt self-decrypting file

  - by sca

  I recently discovered some files I had encrypted and archived on a CD using DDCrypt 2.0, which is a small encryption utility from back in the day. One of its functions is to create self-decrypting files, which are essentially EXE files that you can enter a password and then have the file extracted onto your filesystem. Unfortunately, I can't seem to get them to do this properly. They appear to be decrypting and then at the last moment I get the error: Error opening encrypted file C:\users\username\Temp\dde3cfa.tmp Reason: Success and then another dialog immediately says Error extracting ddc file. I'm not really sure what this means (certainly not success), but I've checked out the temporary file and it appears to be garbage data (although of the right file size). I don't know if anyone has an idea what might be done here to extract the files, or has dealt with a similar situation before. Any ideas are appreciated! Thank you in advance for your time and any help you can provide.

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• How can I make sure my evening project code is mine?

  - by Sebastian

  I'm a physicist with a CS degree and just started my PhD at a tech company (wanted to do applied research). It deals with large scale finite element simulations. After reviewing their current approach, I think that a radically different method has to be applied (they are using a commercial tool which is very limited). I'd rather base my research on an open source finite element solver and write a program which makes use of it. I'd like to develop this idea in the evenings, because that's the time that best suits me for programming (during the day I prefer reading and maths) and use it at a late stage of my PhD. I'd like to have the option to release my program as open source on my website as a reference, for future personal or even commercial (e.g. consulting) use. How can I make sure that my company doesn't claim the code ownership? I don't really I thought that a version control system could help (check out only in the evening). This would document that I programmed not during regular office hours (documented elsewhere). But these data can be easily manufactured. Any other ideas? I want to stress that I'm not interested in selling software. Jurisdiction is EU, if that matters. Thank you.

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• No text in working indicator-messages after enabling different icons depending on the status

  - by user106750

  My indicator-messages has some problems. As you can see in the image, there appears no text. The indicator is working correctly, if there is some income, a number will appear in its proper place or I will be able to see the minutes passed after I got an email, but still no information. As you can see in the picture, I changed the envelope icon for the status one. I configured it as is indicated in http://www.omgubuntu.co.uk/2012/08/ubuntu-add-new-message-indicator-icons, with the indicator changing depending on the status. But I modified it so I see the bubble. The bubble gets the arrow when I'm absent, for example, or an "X" of I'm disconnected, and also turns blue if there an income. I believe the problem is related with this new indicator. The first days, it was working fine, but then the text dissapeared. I've tried uninstalling and reinstalling the packet, with no success. I'm using ubuntu 12.10 64bits with Unity. Someone has an idea how to fix this? I would prefer conserving the characteristic of having different icons. Thanks a lot!!! Image here: http://i.stack.imgur.com/Ucgi4.png

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• what are the rules for SLI ( GTX 550 Ti )

  - by equivalent8

  I got ASUS GTX 550 Ti and I want to SLI it with another graphic card. I heard that not all graphic cards are good idea to SLI, (or not all combinations) because sometimes the final performance could be even worse that with one graphic card. Is that true? What are the rules ? ( maybe chip-set needs to be same or something ? ) I was wondering if you can recommend me what Graphic card should I use as with mine. Should I use same one (GTX 550 Ti) ?

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• Issue with Banshee

  - by Jordan March

  I went to install Banshee using Ubuntu tweak's App button. I clicked the stable ppa, and installed. When it was done, i tried to launch it, it shows up for a split second then closes. So I though it might be having issues with Rhythmbox's associations or something. So I uninstalled Rhythmbox. But same issue. So I try to uninstall Banshee, and it won't, it fails. I thought, well maybe if I tried installing it from the terminal, adding the ppa first (sudo add-apt-repository ppa:banshee-team/ppa) updating apt-get, then sudo apt-get install banshee. But it fails. So now I can't run it, uninstall it, re install it.. or anything. I'm new to linux so I don't know how to go about rebuilding the files. But if anyone has seen this issue before, or has any idea on how to fix this, I would really appreciate the help. Thanks guys

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• What kinds of languages would be most useful for this kind of webapp?

  - by Caedar

  I've had some experience with programming in the past (2-3 years of C++ self-teaching), so I'm no stranger to the programming process, but there are so many languages out there that I'm lost when thinking about this project idea that's been floating around my head: I would like to create a webapp that would be used for helping somebody figure out what kinds of productivity tools would suit them. The first part of the app would basically be a survey with a variety of questions that would help weed out tools that wouldn't be useful for them. (Slider bar between minimalist and maximizer, slider bar between all free apps and no cost limit, checkboxes on what platforms are required, etc.) While the person is filling out the survey, they will see a web of applications, webapps, and other tools forming on the screen with links showing the relationships the programs have with eachother (syncing supported, good combinations of apps, etc.), along with a list of applications below sorted by general use (notetaking, document organization, storage, etc.) I would imagine that each program entered into the database that will be accessed would have a certain set of characteristics, ie. price, user friendliness, platforms supported, general uses, etc. and the survey would be designed to correlate to those elements and remove programs that don't match the criteria set. The difficult part of this entire process would be getting the web of applications to arrange itself and render properly. Now that I've finished mind-dumping, onto my question: What kinds/combinations of programming languages would you imagine being useful for this kind of project, and why? I learn best by setting up a project for myself like this one and tinkering with the languages, so I don't mind if the end product is out of reach from my current skill level. I'd just like some guidance so I don't fumble in the dark for too long.

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• Amazon EC2 as load balanced/failover solution

  - by sugiggs

  Hi All, I'm thinking of an idea but not sure the pros/cons of it. At the moment, we are hosting our website on a dedicated server. As a failover/load balanced solution, I'm thinking to use Amazon EC2+EBS. The files can be rsync and mysql can be setup as master-master replication When the load is high, I can up the machine, given sometime to "sync" and load balanced the traffic there. is it do-able? any link I can read more on this?

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• Rectangular Raycasting?

  - by igrad

  If you've ever played The Swapper, you'll have a good idea of what I'm asking about. I need to check for, and isolate, areas of a rectangle that may intersect with either a circle or another rectangle. These selected areas will receive special properties, and the areas will be non-static, since the intersecting shapes themselves will also be dynamic. My first thought was to use raycasting detection, though I've only seen that in use with circles, or even ellipses. I'm curious if there's a method of using raycasting with a more rectangular approach, or if there's a totally different method already in use to accomplish this task. I would like something more exact than checking in large chunks, and since I'm using SDL2 with a logical renderer size of 1920x1080, checking if each pixel is intersecting is out of the question, as it would slow things down past a playable speed. I already have a multi-shape collision function-template in place, and I could use that, though it only checks if sides or corners are intersecting; it does not compute the overlapping area, or even find the circle's secant line, though I can't imagine it would be overly complex to implement. TL;DR: I need to find and isolate areas of a rectangle that may intersect with a circle or another rectangle without checking every single pixel on-screen.

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• mysql does not start properly

  - by Erik Svenson

  Hi I am using XAMPP on Windows XP. Since I changed the version from 1.73 to 1.77 MySQL does not start properly. That means that the status says, it is started, but the safety check says it is not . Because of that I cannot set any password, which is unacceptable. Any idea? That's mysql_error.log: 111007 9:42:56 [Note] Plugin 'FEDERATED' is disabled. 111007 9:42:56 InnoDB: The InnoDB memory heap is disabled 111007 9:42:56 InnoDB: Mutexes and rw_locks use Windows interlocked functions 111007 9:42:56 InnoDB: Compressed tables use zlib 1.2.3 111007 9:42:56 InnoDB: Initializing buffer pool, size = 16.0M 111007 9:42:56 InnoDB: Completed initialization of buffer pool 111007 9:42:57 InnoDB: highest supported file format is Barracuda. 111007 9:42:57 InnoDB: Waiting for the background threads to start 111007 9:42:58 InnoDB: 1.1.8 started; log sequence number 1595675 111007 9:42:58 [Note] Event Scheduler: Loaded 0 events 111007 9:42:58 [Note] mysql\bin\mysqld.exe: ready for connections. Version: '5.5.16' socket: '' port: 3306 MySQL Community Server (GPL)

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• Launch script after SFTP disconnect

  - by Mates

  I'm currently using Caja (basically the same as Nautilus) to connect using SSH to my server and work with files. What I'm looking for is a way to launch a simple script when I disconnect - I can launch a script after disconnecting from the TTY by putting it into ~/.bash_logout file, but that is not executed when disconnecting from a file manager. The only idea I have is to set up a cronjob which would be checking for existing sftp-server or sshd processes periodicaly and launched the script when there's no such process running. Is there any easier way to do this?

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• High-level description of how experimental C++ features are developed?

  - by Praxeolitic

  Herb Sutter in a video answers a question about the concepts proposal considered for C++11 and from his remarks it sounds like multiple groups offered prototype implementations but all of them left concerns about slow compile times. The comment surprised me because it suggests that, at least in some cases, the prototypes being developed are not just proofs of concept -- they're even expected to perform. All the work that must take has me curious. For mature languages, especially C++, how are experimental language features developed? Is it much different from developing a compiler that implements a standard? Does a developer have a sense of if it will work and perform or even if it ever could? What are the most time consuming parts and are any parts surprisingly easier than one might expect? The question is not what does the C++ standards committee do, but rather the part that comes before. When an experimental implementation for a proposal is being put together and there aren't any completely solidified rules, how is the sausage made? I'm not a professional compiler developer nor do I expect answers with step by step accounts. I'd like a high-level idea of how this would be done or if there are any general patterns at all. I don't know what to expect from the answers but even if there are no rules to the process and the small number of people who do this just cowboy it and then, for stuff that worked out, write up the "official version" as a proposal, that answer would still be informative.

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• Which are the best ways to organize view hierarchies in GUI interfaces?

  - by none

  I'm currently trying to figure out the best techniques for organizing GUI view hierarchies, that is dividing a window into several panels which are in turn divided into other components. I've given a look to the Composite Design Pattern, but I don't know if I can find better alternatives, so I'd appreciate to know if using the Composite is a good idea, or it would be better looking for some other techniques. I'm currently developing in Java Swing, but I don't think that the framework or the language can have a great impact on this. Any help will be appreciated. ---------EDIT------------ I was currently developing a frame containing three labels, one button and a text field. At the button pressed, the content inside the text field would be searched, and the results written inside the three labels. One of my typical structure would be the following: MainWindow | Main panel | Panel with text field and labels. | Panel with search button Now, as the title explains, I was looking for a suitable way of organizing both the MainPanel and the other two panels. But here came problems, since I'm not sure whether organizing them like attributes or storing inside some data structure (i.e. LinkedList or something like this). Anyway, I don't really think that both my solution are really good, so I'm wondering if there are really better approaches for facing this kind of problems. Hope it helps

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• Which LAN driver should I use for Asus F5Z ?

  - by Radek

  A friend of mine asked me to re-install his Asus F5Z notebook with Windows XP. I installed successfully all drivers from Asus driver download site. Everything is working fine but the Ethernet driver. The installation of Lan Driver for Windows XP finishes with strange message "Please shutdown & plug Realtech PCI-e card to complete the installation. Not sure if it matters but OnChip SATA is in 'Native IDE' mode . The original one with Vista was 'IDE - AHCI mode'. Any idea how I can make the LAN adapter to work under Windows XP?

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• Problem in domain name of site in google search [on hold]

  - by Jayadratha Mondal

  My domain provider dont supports advanced DNS at this moment. So I have used iframe to forward to my webserver. Suppose my domain abc.com have a simple html which is opening xyz.com via Iframe. Google was showing abc.com on the search. But from last two days it is showing xyz.com, other things like description, name of the site are ok only the domain changed to xyz.com, but I want to show abc.com. When I'm typing the full domain then google showing the domain as I want. But If I type a part or any keyword then it showing that xyz.com. Anyone have any idea how to show abc.com again? EDIT: I dont know the domain name provider because its not mine. When I'm trying to set new A record its showing that "you need advanced dns to do this currently you are using simple DNS". I'm doing this from cpanel. Normally as per I know there are 3 sections. 1 domain name 2 A record 3Cname. But I dont have any domain name section.

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• xen virtual machines get to many porcentages of cpus

  - by ki0

  Hi everyone, This is my question. I have one Xen server with 8 CPU's and 6 virtual machine running, each virtual hard disk are running in diferent physical hardisk. Everything worked fine but sometimes one virtual machine get almost whole CPU, if the Domain-0 is 90% that is normal, the virtual machine is 500% usage of CPU. I have improved that it is not depends who are working with the VM even when nobody are working with the server this still happens. I dont know what happen. Anyone have any idea?¿ or anyone have happened the same?¿

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• Client and Server game update speed

  - by user20686

  I am working on a simple two player networked asteroids game using XNA and the Lidgren networking library. For this set up I have a Lidgren server maintaining what I want to be the true state of the game, and the XNA game is the Lidgren client. The client sends key inputs to the server, and the server process the key inputs against game logic, sending back updates. (This seemed like a better idea then sending local positions to the server.) The client also processes the key inputs on its own, so as to not have any visible lag, and then interpolates between the local position and remote position. Based on what I have been reading this is the correct way to smooth out a networked game. The only thing I don’t get is what value to use as the time deltas. Currently every message the server sends it also sends a delta-time update with it, which is time between the last update. The client then saves this delta time to use for its local position updates, so they can be using roughly the same time deltas to calculate position updates. I know the XNA game update gets called 60 times a second, so I set my server to update the game state at the same speed. This will probably only work as long as the game is working on a fixed time step and will probably cause problems if I want to change that in the future. The server sends updates to clients on another thread, which runs at 10 updates per second to cut down on bandwidth. I do not see noticeable lag in movement and over time if no user input is received the local and remote positions converge on each other as they should. I am also not currently calculating for any latency as I am trying to go one step at a time. So my question is should the XNA client be using its current game time to update the local game state and not being using time deltas sent by the server? If I should be using the clients time delta between updates how do I keep it in-line with how fast the server is updating its game state?

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• Does connecting to the default host via public IP from within its subnet cause any issues?

  - by username

  I'm setting up a small office network with a single public IP (let's say it's 69.16.230.117). I've configured NAT on the router with incoming traffic forwarded to the server (say the server has a private IP of 192.168.0.2). Is it okay to configure the client machines on the same subnet to access the server via the router's public IP (69.16.230.117)? In practice it's never caused me problems, but I've heard, here and there, that it is a bad idea, and one should use the private IP (192.168.0.2). Does connecting to the default host via public IP from within its subnet cause any issues? Please refrain from writing "never! it breaks the intranet!" ;-)

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• In C++ Good reasons for NOT using symmetrical memory management (i.e. new and delete)

  - by Jim G

  I try to learn C++ and programming in general. Currently I am studying open source with help of UML. Learning is my hobby and great one too. My understanding of memory allocation in C++ is that it should be symmetrical. A class is responsible for its resources. If memory is allocated using new it should be returned using delete in the same class. It is like in a library you, the class, are responsibility for the books you have borrowed and you return them then you are done. This, in my mind, makes sense. It makes memory management more manageable so to speak. So far so good. The problem is that this is not how it works in the real world. In Qt for instance, you create QtObjects with new and then hand over the ownership of the object to Qt. In other words you create QtObjects and Qt destroys them for you. Thus unsymmetrical memory management. Obviously the people behind Qt must have a good reason for doing this. It must be beneficial in some kind of way, My questions is: What is the problem with Bjarne Stroustrups idea about a symmetrical memory management contained within a class? What do you gain by splitting new and delete so you create an object and destroy it in different classes like you do in Qt. Is it common to split new and delete and why in such case, in other projects not involving Qt? Thanks for any help shedding light on this mystery!

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• All browsers hang on windows 7 in tab says 'Waiting for...' need restart

  - by Lakshmila

  I'm having a frustrating problem with browsers on OS windows 7 home premium. IE 10: My web browsing works ok for a while and then pages freeze and tab at top says "Waiting for ...' and never loads. Strangely I can still get to Google search results but if I click anything it freezes. Chrome freezes too and says 'The page has become unresponsive ...kill page' Safari stops also. I have tried clearing cookies, cache, turning off Bitdefender firewall and nothing apart from a restart fixes it. consequently I am forced to restart my computer several times a day to stop this browser hang. I have no idea what could be causing this ..any help greatly appreciated.

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• Managing game objects/components

  - by Xeon06

  Good day everyone, By far the biggest problem that has always dawned on my when programming games is how to structure my code. It just becomes an incredible mess after a while. The reason for that is because I have no idea how different classes should interact with each other. Let's have an example. Say I have a class Player, a class PlayerInput and a class Map. The player class contains information as to the location of the player, whereas the player input class handles changing that location, but by first making sure it's within a walkable area from the map class. How to structure this? My usual approach is to pass those components as parameters in the constructors of the parameters that need them, like so: var map = new Map(); var player = new Player(); var input = new PlayerInput(player, map); The problem with that is that it quickly gets messy, when you add new components you have to go through your constructors and update them, and it doesn't work well if you have mirroring references: var physics = new Physics(input); //Oops, doesn't work var input = new Input(physics); So, how do you guys usually manage this? Thanks.

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• Can't set up printer

  - by Jason Swett

  I'm trying to set up an HP OFficejet Pro 8500 A909a on my Windows XP machine over the network. I know the IP address of the printer but it's unclear to me how to set it up based on that. I have no idea how to troubleshoot this problem. I've tried installing the drivers but when I do that it tells me the printer is on a different gateway from my workstation, which is not true. Also, other people in the office are able to connect to this printer just fine, although the driver apparently didn't work for them, either.

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• Random generation of interesting puzzle levels?

  - by monsterfarm

  I'm making a Sokoban-like game i.e. there's a grid that has some crates on it you can push and you have to get the crates on crosses to win the level (although I'm going to add some extra elements to it). Are there any general algorithms or reading material I can look at for how I could go about generating interesting (as in, not trivial to solve) levels for this style of game? I'm aware that random level generators exist for Sokoban but I'm having trouble finding the algorithm descriptions. I'm interested in making a game where the machine can generate lots of levels for me, sorted by difficulty. I'm even willing to constrain the rules of the game to make the level generation easier (e.g. I'll probably limit the grid size to about 7x7). I suspect there are some general ways to do level generation here as I've seen e.g. Traffic Jam-like games (where you have to move blocks around the free some block) with 1000s of levels where each one has a unique solution. One idea I had was to generate a random map in its final state (i.e. where all crates are on top of their crosses) and then the computer would pull (instead of push) these crates around to create a level. The nice property here is that we know the level is solvable. However, I'd need some heuristics to ensure the level was interesting.

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• How to join a Windows Domain an Map NEtwork Drives on Ubuntu Partition

  - by AgainstClint

  I just installed the current build for Ubuntu on a partition for my work computer. I am a novice when it comes to Linux/Ubuntu, which is why I installed it along side windows. I want to learn how to operate and use Ubuntu much more than I do now, so I figured installing it and trying to do day to day functions here would be a "Thrown into the pool with sharks" way to do it, and I like that way. I did however have a few questions: We are on a Domain in Windows, is there any way to join that domain using the Ubuntu partition? We Also have 16 mapped network drives. I don't actually need ALL of them mapped for Ubuntu, but is there a way to Map at least one of them to see/use here in Ubuntu. Outlook Corporate email, how can I sign in/use it while...well, you get the idea. As I said earlier, I am VERY new to Ubuntu, i've only played around with it a bit at home and never at the office. If you could simplify it down for me a bit, that would be great.

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• Copy an Amazon EC2 Instance to use locally

  - by Excolo

  Ok, so we have a spare server I have installed Debian Wheezy on, and setup Xen on for virtual machines. It has better performance than all our ec2 instances combined, and will cost less to run (for a few various reasons) I would like to get the EC2 instances downloaded to my server, and converted to run for Xen, but im having difficulty finding anything specific. I did not setup the EC2 instances myself, and am not very familiar with them. Everything I have found (which isnt much) just says "Do XYZ" and I have no idea how to do those. So being as specific as possible would be helpful. Also, confusingly I see people writing in forums saying you can only export linux images (which mine are, Ubuntu images) but then I see on amazons export tool saying you can only export Windows server? Am I missing something here? Is that not the right place to be looking? Thanks

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• SSL encryption standards by browser

  - by hfidgen

  Hiya, Does anyone have a table of the default levels of encryption which the various browsers out there support? For instance I know that IE5 and lower struggle even to cope with 40 bit encryption but the latest browsers easily do 256 and beyond. The reason I ask is that I'm looking to get a wildcard certificate for my domain and the price difference is huge between a server gated certificate (where it enforces a minimum of 128bit) and a non-gated certificate (where the browser sets the encryption level). Obviously I like the idea of paying £300 less for the non-gated certificate, but only if I can be sure that the majority of my users (FF3 / Opera / Chrome / IE7+) are going to get good encryption.

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