Search Results

Search found 5287 results on 212 pages for 'physical computing'.

Page 135/212 | < Previous Page | 131 132 133 134 135 136 137 138 139 140 141 142  | Next Page >

• Mahout Recommendations on Binary data

  - by Pranay Kumar

  Hi, I'm a newbie to mahout.My aim is to produce recommendations on binary user purchased data.So i applied item-item similarity model in computing top N recommendations for movie lens data assuming 1-3 ratings as a 0 and 4-5 ratings as a 1.Then i tried evaluating my recommendations with the ratings in the test-data but hardly there have been two or three matches from my top 20 recommendations to the top rated items in test data and no match for most users. So are my recommendations totally bad by nature or do i need to go for a different measure for evaluating my recommendations ? Please help me ! Thanks in advance. Pranay, 2nd yr ,UG student.

  Read the article

• Why does my netbook have more USB controllers than ports?

  - by yodaj007

  My netbook has three USB ports, but when I look in the device manager: Five are listed. Does this matter in the least (or, why are five listed)? The reason I bring this up: See, if I know that two of the devices in the device manager don't actually have physical ports, I can disable then and up that percentage on the other three, correct? I'm constantly being told that my devices can perform faster if I connect them to a USB 2.0 port, but this netbook is less than a year old. Thanks.

  Read the article

• Flow of packets in network

  - by user58859

  I can't visualize in my mind the network traffic flow. eg. If there are 15 pc's in a LAN When packet goes from router to local LAN, do it passes all the computers? Does it go to the ethernet card of every computer and those computers accept the packet based on their physical address? To which pc the packet will go first? To the nearest to the router? What happens if that first pc captures that packet(though it is not for it)? What happens when a pc broadcast a message? Do it have to generate 14 packets for all the pc's or only one packet reach to all pc's? If it is one packet and captured by first pc, how other pc's can get that? I can't imagine how this traffic is exactly flows? May be my analogy is completely wrong. Can anybody explain me this?

  Read the article

• starting 64 Bit Windows Application Development

  - by user173438

  I intend to start writing a 64 Bit Scientific Computing Application (signal processing) for Windows using Microsoft Visual Studio 2008. What should I have ready as far as a development platform is concerned? How would it be different from 32 Bit development? What could be the porting issues for a 32 Bit version that I already have (ok - this might too early to ask.. even before I start compiling)? As you might have guessed, I am looking for general directions. All pointers would be much appreciated! :) Thanks in advance..

  Read the article

• VMware virtual network adapters and Windows Firewall

  - by anonymous

  I am running VMware Workstation 7.1.4 on Windows 7 Enterprise SP1-U (x64). Aside from the physical network adapter, I have created a single virtual network adapter (VMware Virtual Ethernet Adapter for VMnet1) which is connected to (can be seen by) the host and the guests. My problem is, even after applying the "*NdisDeviceType = 1" tweak to the virtual adapter, making it disappear from the Network and Sharing Center, I still can't connect to programs running in the host from the guests, unless I specifically "allowed the program to communicate with the public network" using the Windows Firewall (which I don't want to do). This happens to all the programs and services running in the host (File and Printer Sharing, Database server, HTTP proxy, etc.) I am getting the impression that applying the "*NdisDeviceType = 1" tweak only hides a network from the Network and Sharing Center but not actually making it private. Any hints and suggestions?

  Read the article

• Move the ESXi service console from eth0 to eth1.123

  - by Mircea Vutcovici

  I have an VMware ESXi 4.0.0 with 2 physical network cards. First one, eth0, has only the Service Console and the other one, eth1, is a trunk with all VLANs (including the management VLAN used by the Service Console). I would like to free eth0 port to be able to connect a network storage and I would like to move the management IP from eth0 to eth1/VLAN123. Can I do this remotely? Is it possible from vSphere client? Should I do it from the ESXi console?

  Read the article

• Algorithm to distribute objects in a box (like InDesign, Illustrator, Draw!)

  - by Rafael Almeida

  I have a set of rectangles with their corresponding positions and a big rectangle which serves as the 'bounding box' for these rectangles. I would like to know of an algorithm that would 'distribute the free space' evenly among the rectangles. Some of you may be familiar with the Distribute Spacing option in Adobe InDesign and similar layout-oriented apps. That would be what I'm looking for. I did try looking it up, but I'm not familiar with 'graphical' algorithms terminology and trying only terms relating to 'distribute' mainly yields results about Distributed Computing. So, even the names of the algorithms or better terms to look up would be a big help. Finally, the algorithm doesn't need to be rigorously the same as InDesign's one: pretty much any algorithm that 'distributes' objects inside a region will work fine. In fact, since I'm striving for visual appeal mainly, the more suggestions the better. =D

  Read the article

• LVM, Soft RAID1, and Replication?

  - by mtkoan

  Hi all, I am practicing putting together a HA file server. It is a linux server with 2 1.5TB Hard drives. My plan is to use LVM to manage the physical volumes into logical volumes for /, /home, and /var. Then use md (soft RAID 1) to mirror the image onto the second HDD, THEN use DRDB to mirror the entire setup another server. Is this overkill? Would I just be okay with just md and DRDB? The system will serve user's homedirs (~100) and probably some groupware or other local intranet. On my own machines I've always separated root and /home partitions in case I break something, I can easily reinstall the OS. Should I follow that same theory here? If so I need LVM, because I really can't predict where we'll need more space, /var or /home.

  Read the article

• How to disable 3G USB Modem internal storage from being loaded by linux kernel?

  - by Krystian

  Hi, I've got a problem with my 3G modem [Huawei E122]. It has internal storage and kernel assigns a device [/dev/sdX] to it. Because of that, every second time my machine will not boot - kernel panic - as my usb hdd gets assigned /dev/sdb instead of /dev/sda. I cannot use LABEL nor UUID in root= kernel parameter, as it is only available when using initrd, and I can't use it - I am using Debian on my router - mips architecture machine. I have to prevent this from happening, as my router has to start everyday and I have to be sure it works ok. I don't have physical access to restart it when something goes wrong. I don't use my modem internal storage, there's no SD card inserted. However kernel detects the reader and loads it. I can not prevent loading od usb drivers since my hdd is on USB as well. I will appreciate any ideas.

  Read the article

• Simple Ubuntu Server - Expanding disk space - adding a new drive LVM, RAID0 existing setup - how?

  - by NightWolf

  I have a 1TB ext4 partition mounted at / with all my data and Ubuntu 11.04 (natty) installed. Now this drive is almost full (I used it as a database server for some processing). RAID0 is ok, I can take a failure (touch wood). But I need a way to grow this partition. I have a new 1TB drive I want to add, however as my Ubuntu boot and all data is on the one partition I'm not sure how I can go about setting up a RAID0 or LVM array without loosing all my data. So the question is how can I extend my existing ext4 partition over two physical drives without losing data? Thanks!

  Read the article

• Efficiently compute the row sums of a 3d array in R

  - by Gavin Simpson

  Consider the array a: > a <- array(c(1:9, 1:9), c(3,3,2)) > a , , 1 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 , , 2 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 How do we efficiently compute the row sums of the matrices indexed by the third dimension, such that the result is: [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 ?? The column sums are easy via the 'dims' argument of colSums(): > colSums(a, dims = 1) but I cannot find a way to use rowSums() on the array to achieve the desired result, as it has a different interpretation of 'dims' to that of colSums(). It is simple to compute the desired row sums using: > apply(a, 3, rowSums) [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 but that is just hiding the loop. Are there other efficient, truly vectorised, ways of computing the required row sums?

  Read the article

• What is the best way to back up dedicated web server? (Amanda versus Rsync)

  - by Scott

  Hello everyone, I am trying to establish valid back ups for my web server. It is a linux box on CentOS. I have asked around and "rsync" was suggested by some of the server fault community. However, my coworker at work says that this is really only moving over the physical files and isn't really a usable "snapshot." He suggested using "amanda" and that this did full server snapshots that are more what I am accustomed to. I know at my company we have virtual machines that we take snapshots of and we can restore everything back to just as they were with little effort and little downtime. Is this possible with rsync? Or would I need to create a new server and then migrate the files back and do various configurations? I think I prefer being able to just reset everything to a point in time. Forgive my ignorance, Back ups are something that I have never really had to worry about before.

  Read the article

• How to fight off against a government's internet censorship?

  - by Fellknight

  I live in a country where the left-wing totalitarian regime that it's our government has begun the procedures (legal and physical) to restrict the internet access of it's citizens following the footsteps of China and Cuba. I believe that free access to information is a human right and should not be under any circumstances restricted or sanctioned, i don't want to live in country that does otherwise. Unfortunately leaving for good for the time being it's not an alternative. What I (and all the people that think like me) need to know is; if there are ways of bypassing the possible protections that will be implemented soon?, like the Chinese do . I'm afraid that even proxys might not suffice in the long term since our ISP will be implementing the regulation. Any information or explanation on this will be deeply appreciate it.

  Read the article

• JFFS2 poor mount performance

  - by Marcin Polkowski

  I run multiple ARM boards with Debian Linux installed. Board is equipped with 512 MB of NAND memory. I've observed that after ~3 months of continuous run booting time increased significantly - it takes over 3 minutes to mount filesystem (JFFS2). System was using about 35% of available storage so I’ve removed unnecessary files (got to ~18%) but this didn't change anything. Then I realized that my software produces directories that are left empty so I’ve removed ~500 empty and unnecessary dirs. This didn’t help either. After system is started I see JFFS2 garbage collector (jffs2_gcd_mtd4) running and occupying over 90% of CPU. Now my question: is there a way to „optimize” JFFS2 filesystem for better performance - faster booting (my system have limited timid to boot up)? It would be great if this optimization could be done remotely - I have no physical access to boards.

  Read the article

• Why some recovery tools are still able to find deleted files after I purge Recycle Bin, defrag the disk and zero-fill free space?

  - by Ivan

  As far as I understand, when I delete (without using Recycle Bin) a file, its record is removed from the file system table of contents (FAT/MFT/etc...) but the values of the disk sectors which were occupied by the file remain intact until these sectors are reused to write something else. When I use some sort of erased files recovery tool, it reads those sectors directly and tries to build up the original file. In this case, what I can't understand is why recovery tools are still able to find deleted files (with reduced chance of rebuilding them though) after I defragment the drive and overwrite all the free space with zeros. Can you explain this? I thought zero-overwritten deleted files can be only found by means of some special forensic lab magnetic scan hardware and those complex wiping algorithms (overwriting free space multiple times with random and non-random patterns) only make sense to prevent such a physical scan to succeed, but practically it seems that plain zero-fill is not enough to wipe all the tracks of deleted files. How can this be?

  Read the article

• A simple algorithm for polygon intersection

  - by Elazar Leibovich

  I'm looking for a very simple algorithm for computing the polygon intersection/clipping. That is, given polygons P, Q, I wish to find polygon T which is contained in P and in Q, and I wish T to be maximal among all possible polygons. I don't mind the run time (I have a few very small polygons), I can also afford getting an approximation of the polygons' intersection (that is, a polygon with less points, but which is still contained in the polygons' intersection). But it is really important for me that the algorithm will be simple (cheaper testing) and preferably short (less code). edit: please note, I wish to obtain a polygon which represent the intersection. I don't need only a boolean answer to the question of whether the two polygons intersect.

  Read the article

• FastCgiModule Error 500 on Windows7 Ultimate + IIS 7.5

  - by user63179

  I'm running IIS 7.5 on Windows 7 Ultimate. I've installed PHP Version 5.2.14 using Microsoft Web Platform Installer. I've created a virtual directory and a file with which I can browse it and it returns all the PHP information just fine. I'm trying to install MantisBT, and when I copy all the file to my virtual directory and browse index.php I receive the following error detail: Error Summary HTTP Error 500.0 - Internal Server Error The page cannot be displayed because an internal server error has occurred. Detailed Error Information Module FastCgiModule Notification ExecuteRequestHandler Handler PHP_via_FastCGI Error Code 0x00000000 Requested URL http://localhost:80/mantisbt/index.php Physical Path V:\wwwroot\mantisbt\index.php Logon Method Anonymous Logon User Anonymous I've changed these in the php.ini file: fastcgi.impersonate = 1 fastcgi.logging = 0 cgi.fix_pathinfo=1 cgi.force_redirect = 0 The Handler Mappings have this information: Request path: *.php Module: FastCgiModule Executable: C:[Path to PHP installation]\php-cgi.exe Name: PHP_via_FastCGI Thank you for any advice on this!!

  Read the article

• How do I make a virtualised WAN?

  - by EnchantedEggs

  I want to create a virtualised WAN. As in, I want to have a couple of VMs (VBox) on one physical host machine, that exist on separate LANs, but that can talk to each other. Do I make the VMs, set them up with different IP addresses (e.g. 1.2.3.4 and 5.6.7.8) and then configure port forwarding between them somehow??? I've seen articles that set up port forwarding on port 2222, but I don't really understand why this works. How is setting up the VM to listen to port 2222 and then port forward from there to, say, port 80, any different from just telling the VM to listen on port 80 in the first place? FYI, the VMs run Ubuntu Desktop 14.x.

  Read the article

• How can I resolve this error when using net start / stop: "The service name is invalid" ?

  - by JosephStyons

  We have a server that hosts a service (I'll call it "tomato"). Up until now, a client pc has been able to start and stop this service. They just double-click a batch file, and inside that batch file is the command net stop tomato or net start tomato They recently got a new physical computer, and now those same commands fail with the error: C:\>net stop tomato The service name is invalid. More help is available by typing NET HELPMSG 2185. What do I need to do to let the client pc start and stop this service remotely? Edit: I mis-remembered the original commands. They were not using "net start" and "net stop" remotely. They were using sc \\server_name start tomato and sc \\server_name stop tomato And those commands to indeed still work.

  Read the article

• How to control remote access to Sonicwall VPN beyond passwords?

  - by pghcpa

  I have a SonicWall TZ-210. I want an extremely easy way to limit external remote access to the VPN beyond just username and password, but I do not wish to buy/deploy a OTP appliance because that is overkill for my situation. I also do not want to use IPSec because my remote users are roaming. I want the user to be in physical possession of something, whether that is a pre-configured client with an encrypted key or a certificate .cer/.pfx of some sort. SonicWall used to offer "Certificate Services" for authentication, but apparently discontinued that a long time ago. So, what is everyone using in its place? Beyond the "Fortune 500" expensive solution, how do I limit access to the VPN to only those users who have possession of a certificate file or some other file or something beyond passwords? Thanks.

  Read the article

• How to connect 2 virtual hosts running on the same machine?

  - by Gabrielle

  I have 2 virtual hosts running on my Windows XP laptop. One is Ubuntu running inside vmware player. The other is MS virtual PC (so I can test with IE6 ). The Ubuntu virtual host is running my web application with apache. I can point my browser on my laptop at the Ubuntu IP and view my web app. I read this post http://stackoverflow.com/questions/197792/how-to-connect-to-host-machine-from-within-virtual-pc-image and was able to get my Virtual PC to ping my physical machine using the loopback adapter. But I'm stuck on getting my Virtual PC to see my web application running in the Ubuntu vmware player host. I appreciate any suggestions.

  Read the article

• Changed array composition, mdadm --detail still shows the old array size

  - by Prody

  I have a machine with 8 disks. I installed it with my hoster's install automation (it's OVH, I don't have physical access to it). The machine installed correctly, but it made an array that I wanted to change. It created a raid5 array across 5/8 disks and I've changed it to raid10 across 8 disks. I've done this by first --stopping the old array and then --creating the new array. It warned me that a previous array was there, but I chose to continue. So it created the array, spent 10ish hours syncing it and now that it's ready I get this strange behavior: When I fdisk p on it, I see the correct size. But when I mdadm --detail it I see the old array's size even tho I get the new composition and level. When I try to pvcreate on it, i get the old size again for some reason. Did I have to do something else? Did I miss something?

  Read the article

• NTFS write speed really slow (<15MB/s)

  - by Zulakis

  I got a new Seagate 4TB harddrive formatted with ntfs using parted /dev/sda > mklabel gpt > mkpart pri 1 -1 mkfs.ntfs /dev/sda1 When copying files or testing writespeed with dd, the max writespeed I can get is about 12MB/s. The harddrive should be capable of atleast 100MB/s. top shows high cpu usage for the mount.ntfs process. The system has a AMD dualcore. This is the output of parted /dev/sda unit s print: Model: ATA ST4000DM000-1F21 (scsi) Disk /dev/sda: 7814037168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 2048s 7814035455s 7814033408s pri The used kernel is 3.5.0-23-generic. The ntfs-3g versions I tried are ntfs-3g 2012.1.15AR.1 (ubuntu 12.04 default) and the newest version ntfs-3g 2013.1.13AR.2. When formatted with ext4 I get good write speeds with about 140MB/s. How can I fix the writespeed?

  Read the article

• How do I swap audio output of the left and right speakers?

  - by Manga Lee

  I have two speakers stereo speakers but when I use the sound control panel applet to test my audio configuration I get sound in the right speaker when the user interface indicates the right speaker and vice versa. Is there a way to swap the audio output from left to right and right to left? UPDATE: The reason for this question is that I've recently rearranged my workspace and because of physical constraints the left speaker has to go on the right side and vice versa. I could of course solve this problem with a hardware solution but I'd rather use a software solution if one is available.

  Read the article

• How to create a VPN between a Host and VMWare VMs?

  - by Anindya Chatterjee

  I have a set of machines as follows My home laptop running Win7 Ultimate with internet connection. A vmware workstation vm running Windows Server 2003 Standard edition server in my laptop w/o internet connectivity Some of my peers' machines connected to internet I want to create a VPN with these machines, provided the VM will not have any direct internet connection and my peers should able to connect to the SVN server application running on this Win2003 server VM. Can anybody please suggest me how to setup this network, what software I need to install in both physical machine and vm, what kind of network connectivity should be there between vmware guest and host machine? EDIT: I deliberately don't want to connect the VM with internet. The host will work more of a gateway of the VPN connection for the VM.

  Read the article

< Previous Page | 131 132 133 134 135 136 137 138 139 140 141 142  | Next Page >