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• Calculating Utilization in a Stop-And-Wait Protocol

  - by AlanTuring

  So theres this question in my book and it doesn't state exactly how to go about actually calculating utilization anywhere, and i'm not being able to find any substantial information regarding everything i need to solve this question.(My mid term is next week). Anyway, here's the question: The distance from earth to a distant planet is approximately 9 × 10^10 m. What is the channel utilization if a stop-and-wait protocol is used for frame transmission on a 64 Mbps point-to-point link? Assume that the frame size is 32 KB and the speed of light is 3 × 10^8 m/s. Suppose a sliding window protocol is used instead. For what send window size will the link utilization be 100%? You may ignore the protocol processing times at the sender and the receiver. thanks to anyone who has any idea.

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• How do I stop apps trying to use a dial-up connection?

  - by ProfKaos

  Every now and again, I might have to use a dial-up internet connection via another tethered phone, i.e. Bluetooth connection to the GPRS modem. Now I am back on 'ops normal', i.e. using a shared internet connection on my own phone, or on my 3G stick, but some apps, especially IE9, keep popping up a 'dialup connection' dialogue, which I cannot dismiss enough times ever, to make to stay away. How can I tell these idiot applications that I no longer need a dial-up connection?

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• Biztalk Server 2006 64bit problem

  - by WtFudgE

  Hi, I am trying to install a 64-bit biztalk server 2006. However when I start my installation it asks if I want to get my .cab file from the internet or install it manually etc. Because of internet security issues here at our work we can't get it from the internet directly. So I downloaded it manually: BtsRedistW2k3EN64.cab, to be exact. However when I try to install this it complains about: This installation package is not supported by this processor type. Contact your product vendor. I opened the cab file and found out that the file: SQLServer2005_ADOMD.msi was apparently the problem. So I thought I'd install the 64bit version of this msi then: SQLServer2005_ADOMD_x64.msi, however I get the same error. So atm I'm pretty stuck. Anyone have any ideas? Thanks a lot

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• Google Chrome does not launch after some months without using it in Windows XP/Seven

  - by kokbira

  Well, I have in computers I use with Windows XP or Seven more than one browser installed on them, generally Internet Explorer 8, Firefox 4, Opera 11 and Google Chrome. I often use Firefox, but I want to use Google Chrome sometimes because I have a lot of addons and webapps on it. The issue is: when I try to execute Chrome after some months without using it, it does not function. Using Proccess Explorer or Task Manager, I can see that there is not any Google proccesses running. Then I reinstall it and all functions. But if I do not use it for some months again, it will not function... Is it an update problem? Must I use Chrome everyday or is there another way to avoid that issue? PS: I installed English and Portuguese last versions (how to get the version numbers when it does not execute?), not at the same time, and it continues to do not launch... PS2: There is a running Google Update proccess that is launched in startup: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run    Name:            Google Update    Type:            REG_SZ    Data:            "C:\Users\Ubirajara\AppData\Local\Google\Update\GoogleUpdate.exe" /c

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• Acer Aspire One getting extremely hot

  - by ascom

  I have an Acer Aspire One D250-1197. I really better type fast before it overheats again... For some reason, I'm having a problem with heat on my netbook only when I run Joli OS (Ubuntu 9.10 LTS?). When I leave it idle, with nothing running (other than the regular Joli OS desktop and a couple of doing-nothing terminals), heat slowly builds up to the point where the netbook is burning hot to the touch. I have never had this problem when running Windows 7 Starter (even though it gives me plenty of other headaches). It seems that the fan is spinning, but not fast enough to keep up with the heat buildup. Is there something wrong with the fan drivers? The computer doesn't seem to recognize that it is overheating. What can I do to solve this problem (other than shut it off or use Windows)? I'm currently on the wrong side of Earth (I mean, on vacation), so I just need a temporary fix, such as a driver I can install. Also, I have to use Linux, because I have to share out the wired connection in hotels wirelessly to the iPhones. EDIT: I'm switching from Joli OS to a more "proper" and up to date distribution (Xubuntu 13.04). I'll see if it still has the heat problem and try @nod's cpufreq idea.

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• HD video in Ubuntu?

  - by user33144

  I have video card ATI Radeon 2600 XT. Operating system: Ubuntu. Question: how to enable HD video acceleration for ati card in Ubuntu? Thanks.

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• Windows 7 does not recognise second display output

  - by gilles27

  I've got a PC with dual BenQ G2222HDL monitors and an ATI Radeon HD 4650 video card. I've been running both monitors at 1920x1080 for some months now but last week the second monitor switched to a lower resolution and won't let me go back to 1920x1080. If I right click the Desktop and choose Screen Resolution from the menu, I get two items in the Display: drop down list BenQ G2222HDL D-SUB Display device on: VGA In the past 2 was always the same as 1. If I click Detect a third item appears Available display output on: ATI Radeon HD 4650 but if I use the Multiple displays: drop down list to use it says "No display detected" and then lets me choose from either "Connect anyway on S-Video" or "Connect anyway on Component", neither of which help. It seems like Windows 7 recognises the card is dual-head, and knows I have got two monitors, but can't link it all together. I have checked and all my drivers are up-to-date. Does anyone have any suggestions as to how I can get the second monitor working properly again?

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• Performance hit with new hard drive?

  - by aaaidan

  I've recently upgraded my laptop's internal hard drive from a 160GB to 1TB drive. I cloned the drive, then installed it. The general system performance seems appreciably slower. In particular application launches seem to take much longer. Is this possible, or am I just expecting too much from the new drive? It's running a Macbook Pro which is a couple of years old. Any ideas? 160 GB 7MB cache 5400 rpm NCQ (Hitachi HTS545016B9SA02) -- original drive 1 TB 8MB cache 5400 rpm SATA300 NCQ (Western Digital WD10TPVT-00HT5T0) Sisoftware links: Hitachi HTS545016B9SA02 Western Digital WD10TPVT-00HT5T0

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• Sharing laptop's internal optical drive running windows XP Media Center Edition with Netbook running

  - by Col

  just got a new HP netbook with no optical drive and guide said I should be able to share the optical drive of another windows computer. The netbook is running Windows 7 and the laptop, also HP, with the internal optical drive is running Windows XP Media Center Edition. I have wireless network that both the laptop and netbook access without a problem. The instructions did not seem to work in my case. When I right clicked on Properties of the optical drive and went to the Sharing tab, there was no selction for Advanced Sharing as the instructions said. XP made me go to Network wizard and set up a network, (which I already had). After doing that I could not access the drive from Windows 7. Has anyone benn able to do this?

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• Can my laptop run dual 1080p (Sony Vaio - Nvidia 330M)

  - by Charlino

  I am looking to buy a monitor to setup dual monitors for my laptop and was wondering if my laptop could handle 2 x 1080p. I have a Sony Vaio VPCF116FG which has a Nvidia GeForce 330M chip and 1GB dedicated graphics memory. The laptop also has a Intel® Core™ i7-720QM Processor (1.60 GHz with Turbo Boost up to 2.80 GHz) but I don't know if that's relevant(?). The laptop screen has a native resolution of 1080p (1920 x 1080) so I'll be looking at buying a external monitor with 1080p to connect up using a HDMI cable. So, the question is, will my laptop be able to handle it's own 1080p screen AND an external 1080p screen? TIA, Charles

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• The visual effects in Windows 7 turns off after reboot.

  - by Jagannath

  I have Windows 7 64-bit Professional on my PC. When using English language, the visual effects are turned on. When I use Telugu LIP (India), the visual effects are turned off every time I reboot my PC. When I say visual effects, I don't mean the aero effects. The maximize and minimize effects are not felt. The effects don't show up though the check boxes are checked. Find the image showing the check boxes are checked but the effects not being showed up p. UPDATE: I recreated the account and now the effects are restored properly. UPDATE: Yes it is. This is a standard account. The surprising thing is,the check boxes are checked but still no animations. Once I make the apply button enable, the animations show up again.

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• Safari corrupting downloads?

  - by Kaji

  First off, a bit of background: I had to do an erase and install about 2-3 weeks ago, so this is a fresh, up-to-date installation of Snow Leopard we're dealing with. That said, I decided recently to branch out from simply programming PHP in a text editor and explore some of the other technologies I keep hearing about, and picked up Drupal, Joomla, and the Zend Framework from their respective official sites. Latest complete, stable builds for all 3. Drupal and Joomla downloaded without a problem, but when I put them in my /~username/Sites folder, XAMPP pretends they're not there, even if I restart Apache or the laptop itself. Zend's archive won't open at all. Is Safari corrupting the downloads, or are there other issues in play that can be investigated?

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• Using Windows 8 with Bootcamp?

  - by Farhad Yusufali

  I am trying to install Windows 8 using Bootcamp on OSX Mountain Lion. I need a bootable CD. Does the bootable CD have to be the size of the ISO image or can it be smaller (since it only contains the installer)? If it does not in fact have to be the size of the ISO image, what's the minimum required size of the CD I insert into my drive to create a bootable CD? (i.e. the minimum size of a bootable USB is 8GB)

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• ClearType setting ignored in Windows Virtual PC with Windows XP Pro

  - by Yadyn

  I have a VM set up through Windows Virtual PC for Windows XP Pro and I have been completely unable to get ClearType to work. I have turned it on in the Display - Appearance - Effects dialog but it seems like it completely ignores this. All text is still without any anti-aliasing. Even setting it to normal smoothing doesn't work. If I disable Integration Features, it seems to work, but then I lose a lot of nice features. What's weirder, is that the Windows XP Mode installed with Windows Virtual PC (this is separate from my XP Pro VM) works with both ClearType and Integration Features just fine. I turned it on the same way and it works like a charm, no problems. I'm running Windows 7 Professional 64-bit as the host OS and have the latest (to my knowledge) Windows Virtual PC installed. The only funny business I can think of is that I've enabled 24-bit color via the Group Policy setting inside each XP virtual machine (both Pro and the stripped down XP mode copy). This is a fairly well-known trick documented all over the web, but here's a typical post about it.

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• Gmail & yahoo - offline mail viewer for mac osx

  - by sagar

  Hello ! Every one. My question are divided into two parts ----------------------- 1 ---------------------------- I am having a difficulty regarding receiving my mails. I have 3 gmail accounts & 1 yahoo account. In windows, I use Microsoft outlook or microsoft outlook express. But In mac is there any inbuilt software for it ? If not, is that any freely available mail client for mac osx ? ----------------------- 2 ---------------------------- One more thing, My system administrators has banned regular gmail & yahoo sites. Means I can't use gmail or yahoo site for mailing. Ok. I don't want to break my office rules - but what about my mails on gmail & yahoo, they are really very important for me. Means that - I just want to access incoming mails nothing more than that.

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• eSATA hotswap using Jmicron JMB363 controller

  - by Stephen

  I have tried both IDE and AHCI modes in the BIOS. Also tried many different driver revisions. I can't seem to hot swap an external SATA drive. I can use the wizard to safely remove it, but reconnecting doesn't do anything unless I reboot. I use a thermaltake dock, and I would like to swap in my backup drive sometimes to do images (they take all day over USB). I can reboot, but I'd like to use hot swap. The controller is a Jmicron JMB363. I'm using the latest BIOS on my motherboard, as well.

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• Bonjour/DNS Service Discovery queries

  - by senloe

  I'm trying to implement dns service discovery in my application (no, I'm not asking for a programmatic answer). What I believe is one of my big pain points is generating the query. I know I need to send out a multicast broadcast on port 5353 and want to look for devices of type _ipp._tcp and _print._tcp, but I don't know what the question section needs to look like. For example, in SSDP I sent out a query that looks like the following: "M-SEARCH * HTTP/1.1\r\n" "HOST: 239.255.255.250:1900\r\n" + "MAN: \"ssdp:discover\"\r\n" "ST: urn:schemas-upnp-org:device:Printer:1\r\n" "MX: 5000\r\n\r\n" From what I know about a DNS query I need to send something like: "_ipp.tcp,all,all" but I know there needs to be more. Any pointers to documentation, etc would be greatly appreciated! update rfc1035 appears to contain promising information re the message structure.

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• Removing an OTF macro from a Razer Deathstalker

  - by Herpeslurpee

  I recently bought a Razer Deathstalker, and the other day I managed to activate the OTF macro recorder by accident, so now I have random gibberish and key presses bound to regular keys, so typing anything ends up being a pain, considering the backspace key prints "allallallallall", and so on. The only way I've found of fixing this is reconnecting the keyboard or disabling Synapse, but that's only temporary, as it comes right back the next time I turn my PC on. Razer support mentions nothing related to removing them, and neither anywhere else I could imagine, and nothing shows up in Synapse (god I hate Synapse). But anyways, I'd appreciate it if anyone could help. Thanks

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• 'ttest' function not working in Matlab

  - by Harpreet

  When I am using this statement in Matlab in my computer then its giving error as follow: [h,p,ci]=ttest(randn(100,1),0.1) Error: ??? Error using ==> nanmean Too many input arguments. Error in ==> ttest at 104 xmean = nanmean(x,dim); However if I use the same statement in Matlab in another computer, then its working fine and giving results. Do you know what could be the problem? I am posting this question here suspecting it to be some software problem with Matlab. Correct me if I am wrong.

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• mercurial .hgrc notify hook

  - by Eeyore

  Could someone tell me what is incorrect in my .hgrc configuration? I am trying to use gmail to send a e-mail after each push and/or commit. .hgrc [paths] default = ssh://www.domain.com/repo/hg [ui] username = intern <[email protected]> ssh="C:\Program Files (x86)\Mercurial\plink.exe" -ssh -i "C:\Program Files (x86)\Mercurial\key.pub" [extensions] hgext.notify = [hooks] changegroup.notify = python:hgext.notify.hook incoming.notify = python:hgext.notify.hook [email] from = [email protected] [smtp] host = smtp.gmail.com username = [email protected] password = sure port = 587 tls = true [web] baseurl = http://dev/... [notify] sources = serve push pull bundle test = False config = /path/to/subscription/file template = \ndetails: {baseurl}{webroot}/rev/{node|short}\nchangeset: {rev}:{node|short}\nuser: {author}\ndate: {date|date}\ndescription:\n{desc}\n maxdiff = 300 Error Incoming comand failed for P/project. running ""C:\Program Files (x86)\Mercurial\plink.exe" -ssh -i "C:\Program Files (x86)\Mercurial\key.pub" [email protected] "hg -R repo/hg serve --stdio"" sending hello command sending between command remote: FATAL ERROR: Server unexpectedly closed network connection abort: no suitable response from remote hg! , error code: -1 running ""C:\Program Files (x86)\Mercurial\plink.exe" -ssh -i "C:\Program Files (x86)\Mercurial\key.pub" [email protected] "hg -R repo/hg serve --stdio"" sending hello command sending between command remote: FATAL ERROR: Server unexpectedly closed network connection abort: no suitable response from remote hg!

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• Cron Tips for not running cron jobs on holidays (the monday of a three day weekend)

  - by Poul

  We have about a one hundred machine set-up with each machine running cron jobs like starting and stopping services and archiving these services' log files at the end of the day to a centralized repository. One headache we have is the three-day weekend (we're closed on holidays). We don't want the services starting up on those days and connecting to our business partner's machines. We currently do this by manually commenting out the most critical jobs and letting a bunch of errors happen all day. Not ideal. Basically if a job has '1-5' set in the day field we want this to mean 'work days' and not Monday to Friday'. We have a database that keeps track of which days are indeed 'work days' So, is it possible to override Cron's day-matching algorithm, or is there some other way to easily set a cron setting to avoid things starting up on a Monday holiday? Thanks!

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• How to access VMWare localhost from my mac?

  - by Abe Miessler

  I have developed a asp.net application on my VMWare virtual machine that I can access (on my VM) by going to http://localhost:1044 How can I access this from safari on my Mac that is running the VM? I tried running ipconfig on my VM and then using the IP address that was given for "Ethernet adapter Local Area Connection", something like this: http://192.168.179.139:1044/ but this throws a not found error. I am currently using NAT. How can I get to localhost on my VM from my mac?

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• can't listen to tips on bill Jelen podcast disc

  - by Bob

  Hi all, appreciate any suggestions you can offer. Am using windows 7-64 bit--have the bill Jelen disc with his podcasts on it. Can open the disc, select the podcast I want to listen to -it shows up on my screen but there seems to be no place to click to have the podcast acutally start running. Have used this disc before with xp and windows-not 64- and had no problem- would just click on the podcast and it would start to play. Would try on my other computer that it worked on but that computer is dead. Any ideas?? thanks

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• Forcing specific resolution on a specific monitor on Mac OS X

  - by ufk

  I have Snow Leopard (Mac OS X 10.6) installed with 2 monitors. Main: a 24 inch Dell monitor that Mac OS X detects and displays on 1920x1200 Secondary: a 19 inch Chimei monitor that supports resolution 1440x900 but Mac OS X detects it as 1344x1008. How can I force a 1400x900 resolution on my secondary monitor?

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• How to configure Remote desktop on window server 2008 R2?

  - by Abdullah BaMusa

  I’m trying to connect over internet to my home workstation which has Windows Server 2008 R2 (Web Edition) installed from my PC at work (Windows 7 installed on it) via Remote Desktop. I configure the workstation to accept remote desktop and I can connect to it from my laptop if I’m within same Home LAN but I can’t establish the connection from my PC at work . My question is: Is possible to connect to my workstation over internet using remote desktop? Is there any step by step resource the setup this feature?

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