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• Netbook recomendations for a developer

  - by Joe

  I am thinking about getting a netbook for a secondary laptop. Ideally it would mainly be used for surfing/email/travel, but I would like it to be good enough to be able to run Visual Studio for when I am at conferences and the like. I as thinking it would be nice to be able to put a 16-32GB SSD in it, as well as 2GB of memory. Do you have any recomendations? Will a netbook even suffice, or should I upgrade to a small-form laptop? Edit: I don't need to be able to build software on it. It would just be nice to occasionally be able to try out new tools, APIs, or what have you without getting frustrated due to limited computing power.

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• Algorithm to zoom a plotted function

  - by astinx

  I'm making a game in android and I need plot a function, my algorithm is this: @Override protected void onDraw(Canvas canvas) { float e = 0.5f; //from -x axis to +x evaluate f(x) for (float x = -z(canvas.getWidth()); x < z(canvas.getWidth()); x+=e) { float x1,y1; x1 = x; y1 = f(x); canvas.drawPoint((canvas.getWidth()/2)+x1, (canvas.getHeight()/2)-y1, paintWhite); } super.onDraw(canvas); } This is how it works. If my function is, for example f(x)=x^2, then z(x) is sqrt(x). I evaluate each point between -z(x) to z(x) and then I draw them. As you can see I use the half of the size of the screen to put the function in the middle of the screen. The problem isn't that the code isn't working, actually plots the function. But if the screen is of 320*480 then this function will be really tiny like in the image below. My question is: how can I change this algorithm to scale the function?. BTW what I'm really wanting to do is trace a route to later display an animated sprite, so actually scale this image doesnt gonna help me. I need change the algorithm in order to draw the same interval but in a larger space. Any tip helps, thanks! Current working result Desired result UPDATE: I will try explain more in detail what the problem is. Given this interval [-15...15] (-z(x) to z(x)) I need divide this points in a bigger interval [-320...320] (-x to x). For example, when you use some plotting software like this one. Although the div where is contain the function has 640 px of width, you dont see that the interval is from -320 to 320, you see that the interval is from -6 to 6. How can I achieve this?

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• Is there a way to undo deletion of registry keys while the machine is still running?

  - by Oliver Giesen

  [ also posted from a programmer's POV at http://stackoverflow.com/questions/3299230 ] I messed up big time and deleted a large portion of my registry during a programming experiment: As a result most of the contents of HKEY_CURRENT_USER\Software\ are gone. I haven't logged off or shutdown since this happened. The applications that were already running seem to be coping fine so far but I suspect that after the next reboot there won't be much happiness left... Also, System Restore tells me there are no restore points even though I'm pretty sure there should have been. Could this be another symptom of the purged registry? I wouldn't have expected this information to be stored under HKCU, though... Does anybody know of a technique or utility that can possibly restore some or all of the deleted entries? I'm on Windows 7 Enterprise 32bit. I'm not really holding my breath but you can always hope, can't you?

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• Linux virtual disk stripping or multi-path samba share?

  - by wachpwnski

  I am trying to build a file storage box for media. It needs to span two or more directories or partitions as one share. There are a few solutions but reasons why I want to avoid them, among these are: Using LVM2 for stripping. I don't really have the resources to back up everything on the volumes incase one HDD goes south. I would end up loosing everything. Maybe there is a better option for this to prevent data loss with hot swappable drives or some kind of raid. Using symbolic links in the share. This will get tedious every time a new sub-directory is added. Is there some kind of software raid I can use to merge two directories virtually? I am aware of the issue where /dev/hda1/media/file.1 and /dev/hdb1/media/file.1 both exist. But I'm sure there are some creative solutions for this.

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• Does programmable hardware exist to allow hardware to be programmed by computers?

  - by agentbanks217

  I am a programmer and I have never really dealt with the hardware of anything, only software. I want to start building things that I can control from my computer using programming. My question is are there such devices on the market that have a programmable interface or API? For example, I want to build a automated window blinds opening/closing device, and I would like to be able to control it from my computer e.g. writing an app or some code to schedule them when to open and close. I would like to know if there are any devices that can be programmed to do that (the computer part)? Thanks!

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• Do HTTP reverse proxies typically enable HTTP Keep-Alive on the client side of the proxied connection and not on the server side?

  - by LostInComputer

  HAProxy has the ability to enable HTTP keep-alive on the client side (client <- HAProxy) but disable it on the server side (HAProxy <- server). Some of our clients connect to our web service via satellite so the latency is ~600ms and I think that by enabling keep-alive, it will speed things up a bit. Am I right? Is this supported by Nginx? Is this a widely implemented feature in other software and hardware load balancers? What else besides HAProxy?

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• good books about server architecture?

  - by ajsie

  when the traffic for a website grows i dont think one apache server in a vps is the way to go. i would like to know more about how i then should set up the server side architecture. im not that much into hardware stuff (what kind of cables to use, different cpu architectures etc), but interested in the software architecture: what servers (apache, nginx, squid, varnish etc) to use and how they interact with each other one server in one machine? how many mysql servers. how many apache, nginx servers and so on. how the "machine court" looks like. are there any good books about this area?

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• Can I use Distant tv server with xbmc?

  - by Chiyou

  I want to use distant tv server with xbmc because it seems to work better then mediaportal. I have tried mediaportal only for 1-2 days but I get already a couple of problems. The Pinnacle software that comes with my usb stick and distant tv server is a superior solution. How can I get it work with xbmc? Or How can I map a remote control key to pctv and a remote control key to xbmc? I want to watch TV and browse my video files?

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• What does it mean for a computer to be an "IBM Compatible PC"?

  - by Jon

  A couple questions about this: 1) Is this term even relevant any more? 2) Does this mean anything from a developer's stand point? It is not exactly clear to me if this is a BIOS, architecture, bus or a combination. A piece of software I'm working on expects to see a "Description" of the system and currently windows machines report "AT/AT Compatible". Having been tasked to port this to Mac, I really don't know what a proper "Description" would be - this will most likely be omitted but I was wondering if anyone could provide some insight on the modern usage of this term.

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• Hylafax with serial over IP modem

  - by zero_r

  I'm looking into virtualizing a Hylafax server which currently runs on a dedicated hardware running CentOS with a Divalogic card. The main issue obviously is, how to connect the modem to the VM. There are serial over IP devices available at digi.com. Maybe there are others? Regarding digi.com devices, as far as I understood one can install the RealPort software and then have a /dev/ttySx device presented to the Linux server. This device then can be used as serial connection to the modem. Does someone have such a configuration in place? Or does someone have another idea to virtualize a Hylafax server (outbound faxes only). Thank you in advance

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• Will installing an Ultra ATA cable backwards affect performance?

  - by GMMan

  I've recently purchased a hard drive upgrade for my Xbox 320GB WD Caviar Blue WD3200AAJB and StarTech.com Ultra ATA/66/100/133 cable IDE66 yes I'm crazy When it came to installing the cable, it was too short (my fault), and there wasn't enough space between the master and slave ends to reach both the DVD drive and the hard drive. The only thing I could do was install the cable backwards and twisting it quite a bit to make it fit. The upgrade works, but reading the manual for the hard drive I replaced (10GB Seagate U Series 5), apparently there is a specific way you have to connect the cable. I don't have that option, so the question comes down to, will my drive performance be at Ultra ATA levels, or is it still performing at original ATA speeds? Is there any way I can test this (benchmarking software for Xbox)?

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• Windows xp media center, iTunes, Home sharing problem with app Remote and Apple tv2

  - by Amador

  Hello everybody, greetings from Mexico, sorry about my english but here it goes: I recently bought and apple tv 2nd generation it works just fine, i can see you tube videos but i cant see my library. My pc is conected to the same wi-fi than my apple tv. I have the latest software. I have my firewall off. I turned off and on my router. Search for iphone, ipad remotes on, sharing my library on my local network on, in itunes. Ive checked that my id was the same. On top of that the Remote app doesnt seem to work either. Please help, im kinda loosing my mind over this

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• Searching Objects on SonicWALL (NSA 2600, SonicOS 6.1)

  - by Justin Scott

  Ok, this may sound like a dumb question, but does the SonicOS web interface not have a search option for object definitions? One of my clients recently decided to replace their Astaro Security Gateways with SonicWALL firewalls. These sit in front of a small data center full of servers and we have several hundred custom service and address definitions that need to be ported. The SonicOS interface provides a basic list for service and address definitions but no search option to be found. To make it worse, there is no option to list them all on one page (they're paginated 50 at a time) so I can't use the text search on the web browser either. The Astaro units have a nice search option on their definitions so perhaps I just got spoiled by their software. Am I missing something or is there some way to search for an object without paging through the list and finding an entry manually?

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• How to make my display Grayscale?

  - by Oldarney

  I want to reduce the saturation of my laptop monitor to the point that it is almost grayscale. That's the goal. Intel and Asus don't have an answer. Asus Splendid and the intel graphics control panel can increase the saturation, but not lower it. I would prefer a software solution, although I DIY'ed a vga grayscale adapter for my desktop. I have an Asus UL30A with an Intel GMA 4500MHD. I know that the latest ATI cards, windotosh's and high end nvidia cards all support control panel desaturation. Why? black and white makes me 3 times more productive.

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• Backup Mongodb on EC2 through EBS snapshots - timing issue

  - by DmitrySemenov

  I'm following this guidance http://docs.mongodb.org/ecosystem/tutorial/backup-and-restore-mongodb-on-amazon-ec2/ I have 4 EBS 1000 IOPS volumes assigned to instance These 4 volumes through MDADM assembled into software RAID10 array. I want to do backups through EBS Snapshots as explained in the article above Question: Mongodb says - that I need to mongo shelldb.runCommand({fsync:1,lock:1}); -- this will lock the db for writing ....run snapshot creation... mongo shell db.$cmd.sys.unlock.findOne(); -- this will unlock the db for writing so do I need to unlock the DB for writing after I issued the comand ec2-create-snapshot or after it's finished and the actual snapshot is created thanks, Dmitry

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• why can't i delete this file on my pc

  - by ooo

  i am trying to install some software and it requires removing the following file: cd %SYSTEMROOT%\assembly\GAC rename Microsoft.Office.Interop.Outlook Microsoft.Office.Interop.Outlook.Old the problem is when i do the rename it looks like its successful but it doesn't seem to actually delete Microsoft.Office.Interop.Outlook i tried to explicitally do: del Microsoft.Office.Interop.Outlook and again it looks like it works but then when i do a "dir" i still see that file. Do you have any suggestions on why this wouldn't allow me to delete this file. I have outlook closed when i am doing this so i wouldn't think outlook is locking the file.

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• Why can't I access the WebUI of my DNS-323 NAS after a firmware upgrade?

  - by anonymous2

  Hi Everyone, I just bought a D-Link DNS-323 NAS Enclosure, and have run into a problem. I read that the firmware that had shipped with (1.07) did not support 2TB drives, so I downloaded firmware 1.08. Turned on the device for thwe first time and went straight to the WebUI (everything looked/worked fine) Proceeded with the firmware update, completed successfully. Rebooted and I cannot access the WebUI. I can see the NAS connected via my router interface I can also ping the ip adress assigned, but I cannot access the WebUI or find it via D-Link easy search software. I have tried the factory reset button, but that does not seem to be doing anything, the square blue light just keeps flashing from the moment the unit is powered on, whether I press the reset button or not, and the symptoms remain the same... PS. I did/do not have any drives installed yet. Please help?

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• Sharing RAM resources between 2 or more computers

  - by davee44

  I know there was a somewhat similar question before: How to share CPU or RAM? But, let me just specify it a little more... When Microsoft Windows requires more RAM capacity than available it uses a swap-file to temporarily store the data there, this is actually something like a hard-drive-based RAM. This technology is used for many years. Theoretically, it shouldn't be too hard to implement a similar technology that uses the RAM of different computer(s) in the network for temporary data storage. This just requires a software that runs on computers in the network that accepts and returns data from/to the main computer and keep that data in the RAM; plus the operation system of the main computer must have the ability to use computers in the network instead of (or in addition to) the swap-file. I wonder, are there any implementations of this idea? This would allow users to build RAM clusters using all of their home or office computers, that will boost the performance of a single computer for some development/gaming/video tasks, etc.

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• wmp12 refuses to convert files when syncing

  - by Carbonara

  I have quite a large music collection of MP3s at 320kbps and some WMA files at various bitrates. I'm trying to sync some of them to my HTC Desire and am quickly running out of space. WMP12 has options to set, per device you wish to sync, to auto convert to a lower bitrate whilst syncing. I have set this to auto convert files to a maximum bitrate of 192kbps, that way I can fit more music on the device but keep the files on my PC at the higher rate. See these screens to see that it's set up correctly. Only problem is, surprise surprise for a Microsoft product, it doesn't actually work. Any file that is greater than 192kbps, MP3 or WMA simply fails, doesn't get converted or copied to the device. The message in the sync log displays the rather unhelpful message "error" and that's it. Any help would be appreciated. I'm not really looking for alternative software solutions I'd like to get this working since that's what it's supposed to do.

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• Conficker keeps coming back

  - by PHLiGHT

  I hadn't run into anyone who actually got this virus until recently when dealing with a new client that didn't believe in patching their systems and consquently have been hit with this pest. I was under the impression that if you have KB958644 installed and ran the latest malicious software removal tool that conficker would be squashed. I have several systems that are fully patched, MSRT has removed the virus yet the bugger keeps coming back. This has even happened to a file server and a Domain Controller. What am I missing here? They are running AVG which I used to recommend but I have been doubting it's effectiveness over the past year or so.

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• Is this a good implementation of a loop in Prolog?

  - by Carles Araguz

  First of all, let me tell you that this happens to be the first time I ask something here, so if it's not the right place to do so, please forgive me. I'm developing a rather complex software that has a Prolog core implementing a FSM. Since I don't want it to stop (ever), I'm trying to write a good loop-like predicate that would work using Prolog's recursion. After a few unsuccessful tries (mainly because of stack problems) I ended up having something similar to this: /* Finite State Transition Network */ transition(st0,evnt0,st1). transition(st1,evnt1,st2). transition(st2,evnt2,st0). fsm_state(state(st0),system(Energy,ActivePayloads),[]) :- /* ... */ transition(st0,evnt0,NextState), !, fsm_state(state(NextState),system(Energy,ActivePayloads),[]). fsm_state(state(st1),system(Energy,ActivePayloads),[]) :- /* ... */ transition(st1,evnt1,NextState), !, fsm_state(state(NextState),system(Energy,ActivePayloads),[0,1,2]). fsm_state(state(st2),system(Energy,ActivePayloads),[P|Params]) :- /* ... */ transition(st2,evnt2,NextState), !, fsm_state(state(NextState),system(Energy,ActivePayloads),[]). start :- Sys = system(10,[]), fsm_state(state(s0),Sys,[]). Is this a good approach?

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• Fresh install of 12.04 using USB stick booted into tty1

  - by croc

  I just installed 12.04 Alternate for the first time to give it a try using a USB stick burned with UnetBootIn. It installed without a problem. But it booted into a tty1 console without booting into a GUI. After logging into the tty1 console, I typed unity. It appeared that the system doesn't have unity desktop. How can it be solved? My installation didn't show any error. Something worth mentioning: During installation, I had to choose an option saying 'customize the system to your needs' something like that I don't remember correctly with options 'SSH server','Mail Server', 'Ubuntu Desktop',.....,'Manual selection of packages' etc. I chose 'Ubuntu Desktop'. I haven't encountered something like this in 11.04. To do an installation of Alternate iso using UnetBootIn, i used '12.04_Hdmedia' option of that software and had to change file extension of .ude to .udeb in /pool/main/l/linux that i found in Alternate ubuntu cdrom detect to go around with the cdrom detection problem. I have a 945G intel graphics.

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• Keeping folder of files in sync over 3 machines

  - by Wizzard

  Morning, Got 3 machines that have user content on them, which I need to keep in sync. This is a 3 way sync. Currently I run rsync but we just don't handle deletes. Have looked at something like gluster, but that seems a little over the top Any other software out there to do a 3 way sync, or a good network file system...? There is for web servers so we don't want a slow / IO hungry process. 3 servers... user content could be added to 1 and needs to be moved to other two.

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• Getting a Non-Genuine windows message on a Genuin Windows 7

  - by user36257

  I have a Genuin Win7 enterprise on my Laptop. A few hours ago when I wanted to log into windows it did not accept my Password. I used the safe mode and it accepted the password I was using before this new password. It is the laptop for work and we have a changing password policy for every three months, so the pasword that I could use in SAFE MODE was the password I had for the last previous threee months. ... after that I used SYSTEM RESTORE and it reveretd it back to Yesterday ... so this time I could loging successfully with my current password. BUT It shows me a message that I am a victim of software counterfeiting and when I restarted the windows again and logged into windows, this time it is just a black desktop. weird...any ideas?

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• Outlook Public Calendar

  - by Mike

  Hello, I have a pretty big problem. My son just moved back to work for me in my firm. We set his computer up and installed Outlook03 connected to an Exchange 2000 server. All emails work, (internal/external) but I cannot for the life of me get his outlook to see the public shared calendar. Please let me know if you need any more info. OS is XP SP3, Office03 is SP3. Only other software that's installed are QuickBooks03-09 and Lacerte00-08. Edit: The calendar is in the public folder

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