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  • Power function in prolog

    - by NHans
    Exactly what's the prolog definition for power function. I wrote this code and it give some errors I wanna know exact code for the power function. pow(X,0,1). pow(X,Y,Z):-Y1=Y-1,pow(X,Y1,Z1),Z1=Z*X. Anything wrong with this code?

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  • Printing to Power point

    - by Manoj
    Hi, Similar to a print to pdf option, where we can choose PDF to be the output format when printing something, I am searching for something which can print to a power point file from a file. Is there any such plugin or tool? Also link to a relilable print to pdf tool would be helpful. This essentially would eliminate the export to power point option that the users are asking for. Thanks...

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  • Why Does Wireless Gear Degrade Over Time?

    - by bahamat
    I saw this originally posted on slashdot, but their comment format is not conducive to actually getting a correct answer. Having directly experienced this phenomenon myself, I'm now asking here where I think I can actually get an educated answer. Here's the original question verbatim: Lately I have replaced several home wireless routers because the signal strength has been found to be degraded. These devices, when new (2+ years ago) would cover an entire house. Over the years, the strength seems to decrease to a point where it might only cover one or two rooms. Of the three that I have replaced for friends, I have not found a common brand, age, etc. It just seems that after time, the signal strength decreases. I know that routers are cheap and easy to replace but I'm curious what actually causes this. I would have assumed that the components would either work or not work; we would either have a full signal or have no signal. I am not an electrical engineer and I can't find the answer online so I'm reaching out to you. Can someone explain how a transmitter can slowly go bad? Common (incorrect, but repeated) answers from slashdot include: Back then your neighbors didn't have wifi, now they do. They drowning you out. I don't think this is likely because replacing the access point with a new one and using the same frequencies solves the problem. Older devices had low transmit power. Crank that baby. As mentioned by a FreeBSD wireless developer this violates regulations and can physically damage the equipment. It was also mentioned that higher power in one direction is not necessarily reciprocated. This shows higher bars, but not necessarily a better connection. Manufacturers make cheap crap designed to wear out. This one actually may be legitimate although it is overly broad. What specifically causes damage over time? Heat? Excessive power? So can anyone provide an informed answer on this? Is there any way to fix these older access points?

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  • iMac goes black, makes clicking sound... thoughts?

    - by Josh
    This is the second time this has happened. The display on my Apple iMac (20-inch Late 2006) just went black, system was completely unresponsive to mouse/keyboard input, I could not SSH into nor ping the machine, and it didn't show up in ARD. I could hear a fairly loud clicking noise from inside which sounded like the DVD drive trying to seek -- but there is no disc in the drive. It could possibly be the hard drive... I pressed the power button and the system powered off, and now will not power on again. Thoughts / suggestions as to next course of action?

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  • Dell Dimension 2400 problem

    - by murgatroid99
    I have a new problem with a Dell Dimension 2400 PC. Until yesterday or the day before, it was working fine, but today when I press the power button the light on the power button turns yellow instead of green, the fan behind the processor increases speed until it sounds like a jet engine, and the computer does not boot up. I cleaned out the dust in the computer so that is not the problem. Also, the fan was blowing cold air. Do any of you know what might be causing this and how I might be able to fix it?

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  • Old notebook internal display randomly not recognized

    - by jfcfar
    I have an old Acer TM4001 notebook. If the laptop is powered-off, with the lid closed, when I power it on, it generally works. Then, without touching anything, if I reboot the computer the internal display wil not work anymore. To make it working again I need to shut down the pc, close and reopen the lid and then turn it on. If I close and reopen the lid if it is not working after power the pc on, it won't work. When the screen is working, closing and opening it has no effect (the data cable seems ok). The external monitor always works as expected: If the internal display is not detected, the external will be the main (and only) display. This is not OS-related. When the screen is not working I cannot see the POST. What could be the cause for this?

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  • SEAGATE Barracuda 7200.11 HDD not running

    - by Dane411
    After a huge research, I'm stuck at the beggining of getting my HDD data back. Whats happening to me is that in the moment when I plug the power wire to my external 1TB SEAGATE Barracuda 7200.11 ST31000333AS HDD Fw LC15, it makes the sound like it's spinning to almost full speed and then shuts down and spins up again, and so on. It's well known that those HDDs have a bad firmware that someday randomly fails. There are like 2 main problems identified, BSY (busy) state, and LBA0 error. Last time I connected it to power nothing happened, it didnt try to start at all, is it that so called bricked state? I guess my HDDs error is the first one, but I dont really know if what I described is that BSY state or not, neither I know how to check it. How could I know it? Thank you so much!

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  • Laptop goes black after a minute or so

    - by ZEDA-NL
    I have a laptop that is behaving strangely. When I turn it on, it does everything what it is supposed to do, but after a minute or so I hear a Click and all goes black. It's like it turns off the power. It doesn't matter what the laptop is doing. It also happens when it's just waiting in the Bios setup menu. Has someone experienced this before? Can it be the power supply? Can it be a cooling problem? Any ideas? By the way, it's a Compaq Presario Laptop, maybe 3 years old already.

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  • Computer hanged in the middle of bios flashing process

    - by Stalker
    I have a laptop: Toshiba Satellite c660-17j, today I decided to update BIOS. I've downloaded bios updater from manufacturer's web site, and in the middle of flashing process computer hanged. I was waiting more than 30 minutes, but nothing was changed on the screen, i've tryed to PRESS MORE BUTTONS, but there were no reactions, so i've turned it off by removing battery (all other methods failed, even pressing power button for ~10 secs). After that computer can't start. I understand, that there's MESS in BIOS chip, and it's possible to re-flash it with hardware programmer, but I don't have it. I remember, that on some PCs (even on my eeepc) there was possibility to re-flash bios by inserting usb flash-disk (with .dat file on it, which contained BIOS), and power on PC, while holding some keys combination, then PC was switching to BIOS programming mode and re-flashed BIOS, after that it was possible to boot up normaly. Is there a way to recover computer without hardware programming BIOS chip? p.s. sorry for my english.

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  • Notebook display not working properly

    - by jfcfar
    I have an old Acer TM4001 notebook. If the laptop is powered-off, with the lid closed, when I power it on, it generally works. Then, without touching anything, if I reboot the computer the internal display wil not work anymore. To make it working again I need to shut down the pc, close and reopen the lid and then turn it on. If I close and reopen the lid if it is not working after power the pc on, it won't work. When the screen is working, closing and opening it has no effect (the data cable seems ok). The external monitor always works as expected: If the internal display is not detected, the external will be the main (and only) display. This is not OS-related. When the screen is not working I cannot see the POST. What could be the cause for this?

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  • Smart Array P400 battery failure

    - by RobIII
    The P400 Smart Array controller in my HP DL380G5 is indicating: Battery Status: Failed, Replace Battery 1 in the System Management Homepage. Also the IML indicates: POST Error: 1794-Drive Array - Array Accelerator Battery Charge Low I do have several replacement batteries (actually, several controllers including batteries) lying around at work but never had to actually replace one. I am wondering if the battery replacement (swap) could be done hot or if I need to take down my server to do the battery replacement. I have replaced other spare parts like fans and drives before and all those can be replaced hot. I just don't know about the battery of the P400 Smart Array controller. Any help would be appreciated. EDIT1 For those interested: straight from the horse's mouth: With thanks to Frands Hansen pointing it out here. EDIT2 In the end I did just power down, to be on the safe side and because the manual says so, and replace the battery. Couldn't be easier. Unplugged the old one of the end of the cable (not the end connected to the controller) and reconnected a spare one. The replaced battery is now in the server for about an hour and currently (still) recharging. I'm assuming all will end wel.

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  • After RAID failure SBS 2008 issues logging in and Exchange store does not mount

    - by Josh R
    today has been one of those days. Yesterday a hard drive in our Dell Poweredge 2900 server failed and the RAID array didn't degrade gracefully, so I called Dell (Server still under warranty) and got an engineer to work though the RAID issues with me. He was a nice guy but didn't do too much. We tried to put the RAID in a state where it was bootable and even though we only lost one disk there are still issues with the server. Once we got the server to boot there was an error message saying that the logonui.exe was corrupted and we needed to run chkdsk. I clicked through the error messages and the login screen never came up. So I power cycled the server and it chkdsk automatically but the login screen didn't appear. I tried safe mode, no difference there either. So the issues I am currently having are: 1) The server boots up, the loading windows screen comes up then it dumps me into a black screen where I can only see my mouse cursor. Ctrl+Esc doesn't work Ctrl+Alt+Del doesn't work 2) Some of the services come up: DHCP, DNS, DFS, and Print come up 3) The exchange information store and transport service don't start - I tried using mmc to connect to services.msc on the computer and start them but they throw an error message of "Can't start because group or dependency failed" Has anyone had a problem like this? Can anyone offer some guidance? Thanks a bunch!

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  • How to get wireless (Alfa) operate in full power and speed up wireless Internet?

    - by MahboobeAlam
    I am using Wireless to connect to the internet (router). My laptop has Atheros wireless (AR 242x/542x) adapter but the router is a little bit far-away from my room so I have to use an external wireless adapter i.e. Alfa (Realtek 8187) for connectivity. However, since I have started using Ubuntu I noticed that Alfa is not working in full power, internet speed in Ubuntu is much slower than in Windows on my laptop. When I am using Windows 7 the LED (bulb) on Alfa blinks as it should, but when in Ubuntu, it doesn't blink rather it is on but very dim. Connection using Atheros adapter is also the same (slow)... I have tried 4 methods (I found on the Internet) to troubleshoot this matter but no success. It seems to me that Ubuntu/Linux is not letting these wireless adapters to operate in full strength. iwconfig shows that power management is off for both. So what's the problem? Details: ifconfig eth0 Link encap:Ethernet HWaddr 00:1f:16:1e:36:ec UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:45 Base address:0x6000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1657 errors:0 dropped:0 overruns:0 frame:0 TX packets:1657 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:241697 (241.6 KB) TX bytes:241697 (241.6 KB) wlan0 Link encap:Ethernet HWaddr 00:22:5f:9b:24:b5 inet6 addr: fe80::222:5fff:fe9b:24b5/64 Scope:Link UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:715460 errors:0 dropped:0 overruns:0 frame:0 TX packets:694246 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:493539292 (493.5 MB) TX bytes:235159393 (235.1 MB) wlan1 Link encap:Ethernet HWaddr 00:c0:ca:42:14:62 inet addr:192.168.100.102 Bcast:192.168.100.255 Mask:255.255.255.0 inet6 addr: fe80::2c0:caff:fe42:1462/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:171053 errors:0 dropped:0 overruns:0 frame:0 TX packets:181363 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:74094659 (74.0 MB) TX bytes:59474204 (59.4 MB) iwconfig lo no wireless extensions. eth0 no wireless extensions. wlan0 IEEE 802.11bg ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off wlan1 IEEE 802.11bg ESSID:"Zia" Mode:Managed Frequency:2.412 GHz Access Point: 00:0D:F0:9C:A6:18 Bit Rate=54 Mb/s Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Power Management:off Link Quality=70/70 Signal level=-31 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:204 Invalid misc:6610 Missed beacon:0

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  • Is it possible to power up ports on a USB hub from Ubuntu?

    - by James Henstridge
    I have a D-Link DUB-H7 powered USB 2.0 hub connected to my computer. Occasionally when I reboot the system, I've noticed that some of the ports on the hub get powered down: the green light next to the port is turned off, and the device attached to that port is not visible to lsusb or similar commands. Devices attached to the other ports on the hub function as normal. I am able to restore the ports by disconnecting power to the hub temporarily (from the computer, AC adapter and any devices that might provide any power such as my phone), but this is a bit of a hassle. It seems like something that might be related to power management, so is there some way you can tell the USB hub to power up through software?

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  • why would you use textures that are not a power of 2?

    - by Will
    In the early days of OpenGL and DirectX, it was required that textures were powers of two. This meant that interpolation of float values could be done very quickly using shifting and such. Since OpenGL 2.0, and preceding that via an extension, non-power-of-two texture dimensions has been supported. Are there performance advantages to sticking to power-of-two textures on modern integrated and discrete GPUs? What advantages do non-power-of-two textures have, if any? Are there large populations of desktop users who don't have cards that support non-power-of-two textures?

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  • How to set Fn+F2 to show battery's status throug OSD and not power statistics?

    - by papukaija
    In natty pressing Fn+F2 on my Samsung NC10 opened a new notification with the remaining battery power. After upgrading to Oneiric, it opens the power statistics. Is the a way to revert this change? Checking the battery status with the notification is much faster than finding it from the power statistics. I know that the remaining battery time can be set to be shown on the panel but I'm used to Fn+F2.

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  • problem booting crusty old windows XP

    - by Carson Myers
    I have an acer aspire laptop running Windows XP home. I believe I have some virus on it, I'm not sure--I mostly just run linux in a VM on it so I wasn't too worried. I'm not sure if that virus caused this problem. The laptop wasn't recognizing my USB hard drive for some reason so I decided to restart it. When it started up, it got past the memory test, past the boot screen, (but it paused right here on a blank screen for awhile) and flashed the desktop once (like it does just before the login screen) and then crashed. I got a quick BSOD and then it restarted. Then it tried to boot again, etc etc infinite loop of failure. Well, before trying safe mode, I disabled automatic restart on system crash so I could read the blue screen. There wasn't anything important on it, it said *** STOP: 0x00000000 (0xC0000000 0x,.... ) beginning physical memory dump physical memory dump complete That's not verbatim (obviously) but it didn't help me. so I booted in safe mode, and it stopped on the driver gagp30kx.sys and then restarted (and infinite loop of failure again). I burned a recovery CD and tried that. It loaded it, and I went into repair mode. I ran chkdsk and then disabled the AGP driver. Same thing on booting in safe mode except it stopped at mup.sys instead. I enabled the AGP driver again, and ran chkdsk again from the CD. It said it found problems but didn't say it fixed them. So I ran it a second time, and it said "performing additional checking or recovery" lots of times (I can't tell how many, they went above the screen top). I tried booting again and no luck. Every time I run chkdsk after trying to boot again it says it found and fixed more errors. I think it might be whatever driver is after the AGP driver, but I don't know what it is or how to find out. Can anyone help me fix this?

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  • Error when installing Lync Server, "Installing OcsCore.msi(Feature_LocalMgmtStore)...failure code 1603"

    - by Trikks
    Im battling to install Lync Server in a test environment and are at the "Install Local Configuration Store" step. The prerequisites seems alright but bombs when installing the OcsCore.msi ... Checking prerequisite SqlNativeClient...prerequisite satisfied. Checking prerequisite SqlBackcompat...prerequisite satisfied. Checking prerequisite UcmaRedist...prerequisite satisfied. Installing OcsCore.msi(Feature_LocalMgmtStore)...failure code 1603 Error returned while installing OcsCore.msi(Feature_LocalMgmtStore), code 1603. Please consult log at C:\Users\Administrator.HAWC\AppData\Local\Temp\1\Add-OcsCore.msi-Feature_LocalMgmtStore-[2012_07_08][12_00_27].log The logfile doesn't really help me either, this is the end of it Property(S): Privileged = 1 Property(S): USERNAME = Windows User Property(S): DATABASE = C:\Windows\Installer\9525f.msi Property(S): OriginalDatabase = C:\ProgramData\Microsoft\Lync Server\Deployment\cache\4.0.7577.0\setup\OcsCore.msi Property(S): UILevel = 2 Property(S): Preselected = 1 Property(S): ACTION = INSTALL Property(S): WIX_ACCOUNT_LOCALSYSTEM = NT AUTHORITY\SYSTEM Property(S): WIX_ACCOUNT_LOCALSERVICE = NT AUTHORITY\LOCAL SERVICE Property(S): WIX_ACCOUNT_NETWORKSERVICE = NT AUTHORITY\NETWORK SERVICE Property(S): WIX_ACCOUNT_ADMINISTRATORS = BUILTIN\Administrators Property(S): WIX_ACCOUNT_USERS = BUILTIN\Users Property(S): WIX_ACCOUNT_GUESTS = BUILTIN\Guests Property(S): ROOTDRIVE = C:\ Property(S): CostingComplete = 1 Property(S): OutOfDiskSpace = 0 Property(S): OutOfNoRbDiskSpace = 0 Property(S): PrimaryVolumeSpaceAvailable = 0 Property(S): PrimaryVolumeSpaceRequired = 0 Property(S): PrimaryVolumeSpaceRemaining = 0 Property(S): INSTALLLEVEL = 1 Property(S): SOURCEDIR = C:\ProgramData\Microsoft\Lync Server\Deployment\cache\4.0.7577.0\setup\ Property(S): SourcedirProduct = {9521B708-9D80-46A3-9E58-A74ACF4E343E} === Logging stopped: 2012-07-08 12:01:46 === MSI (s) (98:F8) [12:01:46:354]: Note: 1: 1729 MSI (s) (98:F8) [12:01:46:354]: Product: Microsoft Lync Server 2010, Core Components -- Configuration failed. MSI (s) (98:F8) [12:01:46:354]: Windows Installer reconfigured the product. Product Name: Microsoft Lync Server 2010, Core Components. Product Version: 4.0.7577.0. Product Language: 1033. Manufacturer: Microsoft Corporation. Reconfiguration success or error status: 1603. MSI (s) (98:F8) [12:01:46:356]: Deferring clean up of packages/files, if any exist MSI (s) (98:F8) [12:01:46:356]: MainEngineThread is returning 1603 MSI (s) (98:84) [12:01:46:362]: RESTART MANAGER: Session closed. MSI (s) (98:84) [12:01:46:362]: No System Restore sequence number for this installation. MSI (s) (98:84) [12:01:46:363]: User policy value 'DisableRollback' is 0 MSI (s) (98:84) [12:01:46:363]: Machine policy value 'DisableRollback' is 0 MSI (s) (98:84) [12:01:46:363]: Incrementing counter to disable shutdown. Counter after increment: 0 MSI (s) (98:84) [12:01:46:364]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 MSI (s) (98:84) [12:01:46:364]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2 MSI (s) (98:84) [12:01:46:364]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1 MSI (s) (98:84) [12:01:46:364]: Restoring environment variables MSI (s) (98:84) [12:01:46:373]: Destroying RemoteAPI object. MSI (s) (98:D4) [12:01:46:373]: Custom Action Manager thread ending. MSI (c) (20:64) [12:01:46:379]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1 MSI (c) (20:64) [12:01:46:380]: MainEngineThread is returning 1603 === Verbose logging stopped: 2012-07-08 12:01:46 === Any advice where to start in this? Thanks

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  • What are some SMART Criteria I can use when comparing "green" datacenters?

    - by makerofthings7
    I'm looking to reduce my carbon footprint and want to find a "green" datacenter. There are so many ways to define a "green datacenter' I'm looking for examples of SMART Criteria such as 20% of power from renewable resources Low Power Usage Effectiveness When it comes to running a green datacenter, what are additional key factors I need to look for? What key words or technologies might those energy efficient datacenters be using?

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  • What PSU would be needed for a mid-range computer?

    - by iconiK
    I am building a mid-range computer primarily for gaming and graphic design. With the following components, what power supply unit would be good, in terms of having ample power for future expansion, with good efficiency and quiet operation, but most important, reliability in the long (5+ years) run? Gigabyt GA-H67MA-UD2H LGA 1155 Intel Core i5 2300 2.8GHz Crucial CT2KIT51264BA1339 2x4GB Kit ASUS HD 6850 DirectCU Intel X25-V 40GB SSD 2xSeagate 7200.12 1TB HDD RAID 1 Antec NSK-3480 µATX Case

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  • Possible capacitor plague - need help identifying

    - by cornjuliox
    I've been having some PC power issues lately, and I think I've tracked it down to a bad power supply. Lately, when I'm on my PC it will often restart without warning, displaying "Hypertransport sync flood error occurred last boot." once POST finishes. I've googled the error, but can't come to a definitive conclusion as to what's causing it. I've seen posts suggesting that it might be a power supply issue, but nothing conclusive. Here's what I've done so far: -I haven't installed anything suspect within the last 3 months. -I do overclock just a tiny bit, so I tried raising the voltages a little. That didn't work so I brought both CPU multiplier and voltages all back to their default settings, but that didn't solve the problem either. The problem still occurs. -AV scanned the whole system, nothing suspect. -I suspected that it might be a bad power supply so I cracked that open and found the following: I think it might be cap plague, but I'm not sure. It looks more like glue TBH. Could someone help me figure out what might be wrong with this PC? EDIT: Sometimes, after these restarts, I noticed that the GPU fan doesn't spin up, and the single rear case fan that just happens to be connected to the same molex Y-cable as the GFX card doesn't spin up either. Anything to that? EDIT 2: I do use the system quite heavily, but I don't know how that will factor into this. I often play Diablo 3 and EVE Online at the same time, frequently alt-tabbing between the two. I also have Firefox open in the background, sometimes with several tabs, and if I feel like it, I'll mute the in-game sound and open foobar2000 for better music. Could it be that I'm just pushing this thing too hard? EDIT 3: I also noticed something odd. Right before I experience these restarts, my monitor would suffer from very faint lines of static moving across the screen. The monitor is still very much useable, but it is very annoying. Following the restart it disappears, and then would gradually re-appear over the next few days, and then restarts again. I find it to be very odd. System specs for good measure: Orion 600 W PSU AMD Athlon II X3 440 (overclocked to 3.14 ghZ, raised the CPU multiplier to x13 from x10) MSI G40-775 motherboard 1 GB inno3D GTX 550 ti 4 GB DDR3 RAM 500 GB Samsung SATA HD

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  • Grounded outlet on external hard drive.

    - by goathens
    Is there any value in getting an external hard drive with a grounded power supply? Would grounding the drive protect it from a static jolt from my hand when I pick it up? I've only really ever used the huge 5.25" external housings (they usually have an integrated power supply and use the standard heavy PSU cable with ground), and I need some more but noticed while shopping that the current trend is towards smaller enclosures with the external brick (and hardly ever grounded).

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