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• ASP.NET MVC WebService - Security for Industrial Android Clients

  - by Chris Nevill

  I'm trying to design a system that will allow a bunch of Android devices to securely log into an ASP.NET MVC REST Web service. At present neither side are implemented. However there is an ASP.NET MVC website which the web service will site along side. This is currently using forms authentication. The idea will be that the Android devices will download data from the web service and then be able to work offline storing data in their own local databases, where users will be able to make updates to that data, and then syncing updates back to the main server where possible. The web service will be using HTTPS to prevent calls being intercepted and reduce the risk of calls being intercepted. The system is an industrial system and will not be in used by the general Android population. Instead only authorized Android devices will be authorized by the Web Service to make calls. As such I was thinking of using the Android devices serial number as a username and then a generated long password which the device will be able to pick up - once the device has been authorized server side. The device will also have user logins - but these will not be to log into the web service - just the device itself - since the device and user must be able to work offline. So usernames and passwords will be downloaded and stored on the devices themselves. My question is... what form of security is best setup on the web service? Should it use forms Authentication? Should the username and password just be passed in with each GET/POST call or should it start a session as I have with the website? The Android side causes more confusion. There seems to be a number of options here Spring-Android, Volley, Retrofit, LoopJ, Robo Spice which seems to use the aforementioned Spring, Retrofit or Google HttpClient. I'm struggling to find a simple example which authenticates with a forms based authentication system. Is this because I'm going about this wrong? Is there another option that would better suite this?

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• Overcrowded Windows XP Folders

  - by BlairHippo

  I know that, technically, an individual Windows XP directory can hold an immense number of files (over 4.29 billion, according to a quick Google search). However, is there a practical ceiling where too many files in one directory starts having an impact on reads to those files? If so, what factors would exacerbate or help the issue? I ask because my employer has several hundred XP machines in the field at client sites, and the performance on some of the older ones is getting "sludgy." The machines download and display client-defined images, and my supervisor and I suspect that our slacktastic approach to cache management could be to blame. (Some of the directories have tens of thousands of images in them.) I'm trying to gather evidence to support or contest the theory before spending time on a coding fix.

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• Using HTML5 Today part 2&ndash;Fixing Semantic tags with a Shiv

  - by Steve Albers

  Semantic elements and the Shiv! This is the second entry in the series of demos from the “Using HTML5 Today” talk. For the definitive discussion on unknown elements and the HTML5 Shiv check out Mark Pilgrim’s Dive Into HTML5 online book at http://diveintohtml5.info/semantics.html#unknown-elements Semantic tags increase the meaning and maintainability of your markup, help make your page more computer-readable, and can even provide opportunities for libraries that are written to automagically enhance content using standard tags like <nav>, <header>,  or <footer>. Legacy IE issues However, new HTML5 tags get mangled in IE browsers prior to version 9.  To see this in action, consider this bit of HTML code which includes the new <article> and <header> elements: Viewing this page using the IE9 developer tools (F12) we see that the browser correctly models the hierarchy of tags listed above: But if we switch to IE8 Browser Mode in developer tools things go bad: Did you know that a closing tag could close itself?? The browser loses the hierarchy & closes all of the new tags.  The new tags become unusable and the page structure falls apart. Additionally block-level elements lose their block status, appearing as inline.    The Fix (good) The block-level issue can be resolved by using CSS styling.  Below we set the article, header, and footer tags as block tags. article, header, footer {display:block;} You can avoid the unknown element issue by creating a version of the element in JavaScript before the actual HTML5 tag appears on the page: <script> document.createElement("article"); document.createElement("header"); document.createElement("footer"); </script> The Fix (better) Rather than adding your own JS you can take advantage of a standard JS library such as Remy Sharp’s HTML5 Shiv at http://code.google.com/p/html5shiv/.  By default the Modernizr library includes HTML5 Shiv, so you don’t need to include the shiv code separately if you are using Modernizr.

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• Need a PCIe desktop graphics card for dual-monitor

  - by Graham

  I have a mid-2008 workstation with two HD monitors supporting HDMI and DVI inputs. Since Ubuntu 11.10, I have experienced no end of trouble with my NVidia Quadro NVS 290 in TwinView dual-monitor output. Others have similar desktop TwinView woes. I want a new graphics card. Previously I asked for a graphics card recommendation and response was Nvidia Geforce GTS 450... but really I'm looking for someone who has actually got a working dual-monitor desktop to tell me what card they use so I can get something that is known to work. So please, people who have no-issues with their 64-bit Ubuntu 12.04 Unity 3D desktop spread across two HD-resolution external monitors (either DVI or HDMI connector), and who also run Google Chrome (which throws a spanner due to its own GPU compositing)... please let me know what graphics card you have so I can buy one. Gathering Options These seem to be the Nvidia cards featuring dual DVI. But they all seem to be gaming cards - what has dual-DVI, good support, but is not a massive gaming card? Nvidia GTS 450 (previously recommended) - 2x DVI Nvidia GTX 550 Ti (used by System76) - 2x DVI Nvidia GT 430 (used by System76) - 1xDVI, 1xHDMI Nvidia GT 640 (found on NVidia site) - 1xDVI, 1xHDMI (also GT 620, GT 630) Has anyone had a good desktop dual-monitor Unity 3D experience with ATI cards?

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• I'm a student learning C++ and I've recently found out about Ruby. Would learning (some of) Ruby help me with C++ or would it just confuse me?

  - by Von32

  Hi! As the title says, I'm a student that will be starting my second year of C++ very soon. I've discovered Ruby, however. While I've heard much buzz about the language before, I've disregarded it because I always thought it wasn't something that would be useful. However, I've found a number of FANTASTIC tutorials on ruby and am interested in learning it (probably because it seems so straightforward). Would playing around with ruby be a good or bad idea? I understand that there's not such thing as bad knowledge, but I'm afraid that Ruby will only confuse me when dealing with C++. How different from C++ is it? I've read it's based on C in some way, but my google-fu seems to be horrible today. How useful is Ruby in the real world? I'm not specifically asking about jobs- I'm more interested in what sort of applications may come from this language. Any specific examples worth looking at? Going back to Question two- I've read some posts on here that Ruby and C++ can hold hands once in a while. How flexible is this relationship? Is it rarely that this would work? Thank you Very much for your time! EDIT: This has to be the one community on the internet that doesn't suck. Why have I never posted before? You guys are awesome!

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• Installing ethernet drivers with no install package

  - by Josh

  I recently got my new Sony Vaio laptop and formatted it into Windows 7 Ultimate. I would like to use the Windows Easy Transfer Tool over a network connection to transfer some of my files over from my desktop PC. Before I do this though, I need to install the ethernet LAN drivers (I'm currently using the built in Wifi). I downloaded the original LAN driver that came with my Vaio originally from the Sony website: http://support.vaio.sony.eu/computing/vaio/downloads/preinstalled/index.aspx?l=en_GB&m=VPCEB1Z0E_B [Scroll down to the 450KB Ethernet driver] When I unzip the package, these files are inside: yk62x64.cat yk62x64.dll yk62x64.inf yk62x64.sys As you can see, no installer. Can anyone guide me through how to properly install these drivers? I have thought of using Google but I'm clueless as to what query to use. Thanks.

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• Fedora12 Slow USB 2.0 Write Speed, ehci_hcd module is missing

  - by MA1

  I am using Fedora 12, the problem I am facing is USB 2.0 write speed. I have a dual boot system with Windows XP and Fedora 12. USB 2.0 write speed in Windows XP is much faster then what I am getting in Fedora 12. After searching Google I came to know that ehci_hcd module is missing/not present in my system. ehci_hcd module is neither loaded nor it is present in the available list of modules. Can someone guide me how to fix this issue? Does ehci_hcd have something to do with USB 2.0 write speed? Do I have to recompile the kernel and add/enable the ehci_hcd module?

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• Can web apps allow fast data-typists to "type-ahead"?

  - by user61852

  In some data entry contexts, I've seen data typists, type really fast and know so well the app they use, and have a mechanic quality in their work so that they can "type ahead", ie continue typing and "tab-bing" and "enter-ing" faster than the display updates, so that in many occasions they are typing in the data for the next form before it draws itself. Then when this next entry form appears, their keystrokes fill the text boxes and they continue typing, selecting etc. In contexts like this, this speed is desirable, since this persons are really productive. I think this "type ahead of time" is only possible in desktop apps, but I may be wrong. My question is whether this way of handling the keyboard buffer (which in desktop apps require no extra programming) is achievable in web apps, or is this impossible because of the way web apps work, handle sessions, etc (network latency and the overhead of generating new web pages ) ? Edit: By "type ahead" I mean "keyboard type ahead" (typing faster than the next entry form can load), not suggets-as-you-type-like-google type ahead. Typeahead is a feature of computers and software (and some typewriters) that enables users to continue typing regardless of program or computer operation—the user may type in whatever speed he or she desires, and if the receiving software is busy at the time it will be called to handle this later. Often this means that keystrokes entered will not be displayed on the screen immediately. This programming technique for handling user what is known as a keyboard buffer.

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• fedora13 mouse change -I Beam

  - by tom smith

  hi. sorry to have to ask such a basic question!! i've got fedora 13, trying to figure out how to change the "I Beam" pointer. earlier, i had a "thin" "I Beam" pointer in my gedit/term windows. now, I have a "thicker/shadow" kind of "I Beam" pointer when i move the mouse over the gedit/term windows. obviously, i've made some change, but i can't figure out what I changed, or where this attribute is set. i've checked google/irc, as well as looked through the "system-preferences-appearance" with no luck.. i saw the customize part of the gui, and could resize the "arrow" but nothing for the "I-Beam". this isn't critical, but it is anoying!! any thoughts/pointers would be helpful. thanks

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• fedora13 mouse change -I Beam

  - by tom smith

  hi. sorry to have to ask such a basic question!! i've got fedora 13, trying to figure out how to change the "I Beam" pointer. earlier, i had a "thin" "I Beam" pointer in my gedit/term windows. now, I have a "thicker/shadow" kind of "I Beam" pointer when i move the mouse over the gedit/term windows. obviously, i've made some change, but i can't figure out what I changed, or where this attribute is set. i've checked google/irc, as well as looked through the "system-preferences-appearance" with no luck.. i saw the customize part of the gui, and could resize the "arrow" but nothing for the "I-Beam". this isn't critical, but it is anoying!! any thoughts/pointers would be helpful. thanks

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• My Mac is slow but don't know what's slowing it down

  - by duality_

  My Mac (Macbook Pro) is sometimes slow doing basic tasks, like browsing the web or something like that. If I open Activity Monitor, I have (maybe) one program that is about 10 % CPU, others are below 1 %. My CPU usage is not full. I still have more than 2 GB of free memory (out of 5 GB). There is no heavy I/O activity like copying files. My open programs are Google Chrome (6 tabs, none of which are in some way (flash, many DOM objects, Javascript) have IMO, except maybe Gmail), Activity Monitor, Finder, Sublime Text 2 (text editor) and iTerm (terminal). What is causing the slowdown? "Slow" being: taking time to write these characters (I press the keyboard keys but there is a delay before I see them on the screen), changing tabs or programs, etc.

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• 3ds Max error dialog: "Instancing not supported for this action"

  - by monsto

  "Instancing not supported for this action” is the dialog I get. My favorite part is that, according to google and yahoo, apparently i am the only person in the history of mankind to experience these words together in this order, let along get this message from Max. Thanks, autodesk, for putting this dialog in special for me! So I’ve created my model (nws) and was setting up a Skin Wrap. Selected "Face Deformation", added the base-skin for weight, checked “weight all points”. . . clicked “convert to skin” and got that dialog. My model doesn’t have a whole lot of elements to it, I had a left and right appendage that came from a base model (skyrim). so, i did a clonecopy of all 3 of my elements, just to be sure nothing was instanced… and VOILA! Same error message. the only other elements are an imported NIF mesh and skeleton. Any idea where this is coming from or how I can make it go away so that I can export my mesh?

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• RTL8168B/8111B Lan card is not detected in RHEL5.1..Not finding Lan card driver for this particular

  - by Deepak Narwal

  Hello friends... In My computer Lan card model is Realtek RTL8168B/8111B PCI-E GIGABIT ETHERNET NIC (NDIS 6.20) My system is dual boot windows 7 and redhat 5.1 Now windows 7 automatically detected this lan card but in redhat lan card is not detected.I have tried to through evrywhere like network or through neat-tui but it is not showing lan card.. I tried google also but all of them providing windows software for this lan card . So please anyone can tell me the link so that i can download drivers for this and can use internet there.. Thanks a lot in advance Deepak Narwal

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• Is there such a thing as "server sliding" (or similar), and if so, what is it?

  - by mahoke

  I am not a network engineer, but rather a translator, so I apologize in advance if this is a rather obvious question to some of you. Normally Google can answer my questions, but in this case I'm coming up blank. If I'm asking this in the wrong forum, please let me know. The text is talking about RADIUS accounting functionality. It says that when there are many (more than 200) authenticated terminals, if a command is issued to forcibly clear the terminals, "sliding to the next RADIUS accounting server may occur" -- the original text literally says "RADIUS accounting server-slide". I think I can basically understand what they are getting at in terms of meaning, but I would like to know whether this is the correct expression to use. I get the impression from my inability to find it simply by Googling that perhaps it's described differently in English.

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• GoogleTest C++ Framework Incompatible With XCode 4.5.2 and OSX 10.8.2

  - by eb80

  I am trying to follow the instructions mentioned here for setting up Google's C++ framework in XCode Version 4.5.2 (4G2008a). First, I got "The run destination My Mac 64-bit is not valid for Running the scheme 'gtest-framework'". The answers here Xcode 4 - The selected run destination is not valid for this action are not working for me. I was able to change the build SDK following the instructions here Unable to build using Xcode 4 - The selected run destination is not valid for this action, except this resulted in many build failures such as "Unsupported compiler '4.0' selected for architecture 'x86_64'" and "Unsupported compiler '4.0' selected for architecture 'i386'" I've changed nothing out of the box, so this is very frustrating that I cannot seem to get this to build. Details of Machine: 64bit Mac OSX 10.8.2 Build 12C3006 Details of XCode: Version 4.5.2 (4G2008a)

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• Why am I unable to turn off recursion in ISC BIND?

  - by nbolton

  Here's my named.conf.options file: options { directory "/var/cache/bind"; dnssec-enable yes; auth-nxdomain no; # conform to RFC1035 listen-on-v6 { any; }; # disable recursion recursion no; }; I've tried adding allow-recursion { "none"; } before recursion but this also has no effect; I'm testing it by using nslookup on Windows, and using google.com. as the query (and it returns an IP, so I assume recursion is on). This issue occurs on two servers with similar setups.

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• JZ0SJ: Metadata accessor information was not found on this database.

  - by Anthony Kong

  The complete message is: (JZ0SJ: Metadata accessor information was not found on this database. Please install the required tables as mentioned in the jConnect documentation The server is Adaptive Server Enterprise/15.5/EBF 18380 SMP ESD#3/P/x86_64/Enterprise Linux/asear155/2531/64-bit/FBO/Fri Jan 14 07:04:05 2011 Google search does not turn up definite answer to the problem. A lof of result are rather dated too. I checked the documentation but it does not mention any tables. What is the root cause of this problem? At the very least I would like to see a list of the required tables somewhere?

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• Virtual box - How to add disks and move var, opt and home to them?

  - by Jarrod Roberson

  I created a CentOS 5.6 Guest OS Virtual Machine. I made the first disk 10GB, I am rapidly outgrowing it. It was suggested that I make disks for my /var, /opt and /home directories and move them so I can better manage the disks for backing up and what not. This sounds like a good idea. I know how to create the disks in Virtual Box. I have dug around Google and the internet in general and all my attempts at doing this have failed. Snapshots are awesome! I can get the drives fdisked, and I have had limited success mounting them to /mnt/var, /mnt/home and /mnt/opt, but even in single user mode ( init 1 ) I can't get the entire contents of the directories to move over, and then the machine won't reboot correctly. cd /var cp * -ax /mnt/var The /var directory in particular is not wanting to move everything to the new location. How do I format, mount and move the /var, /opt and /home to my new disks?

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• LameUser trying - apache2 webserver authentication - IP range to access without pass prompt others with it

  - by Mikee

  I have (maybe silly) question regarding the apache2 webserver and security - I am trying to archieve this: Users connecting from 192.168.1.24 not to be prompted for password and allowed Others asked for username and password if correct then connect. I am trying to do this for the whole directory /var/www No matter whether I put the code into .htaccess file or in httpd.conf it doesn't work for me. Order deny,allow Deny from all AuthName "PassRequest" AuthType Basic AuthUserFile /var/.htpasswd Require valid-user Allow from 192.168.1.24 Satisfy Any If I try to connect to the page I am allowed from both the allowed IP or any other, If I remove the satisfy any line then I am prompted for password, if I remove the password too and try to connect from different IP I am NOT REFUSED ... is there some module that needs to be activated or why is the IP directive skipped ? It needs to be put in every folder or /var/www/.htaccess is enough ? can I just put it in httpd.conf instead or not ?? I spend last 4 hours trying to google up why it is acting like that, Any help will be highly appreciated :-))

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• pthread-stubs for CentOS

  - by Rodnower

  Hello, I try to install Mesa 7.8 for CentOS 5. During installation of Mesa I required to install librdm, and during librdm (v. 2.4.19) installing I got error about missing pthread-stubs: checking for PTHREADSTUBS... configure: error: Package requirements (pthread-stubs) were not met: When I try: yum provides *pthread-stubs* I get nothing In other place I found that libxcb-devel is what I need, but yum not find this too. During searching in Google, I found rpm's for Fedora only. Any one know whether there is some packege which provides pthread-stubs for CentOS, or other, less expensive way to install Mesa? Thank you for ahead.

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• FreeType2 Crash on FT_Init_FreeType

  - by JoeyDewd

  I'm currently trying to learn how to use the FreeType2 library for drawing fonts with OpenGL. However, when I start the program it immediately crashes with the following error: "(Can't correctly start the application (0xc000007b))" Commenting the FT_Init_FreeType removes the error and my game starts just fine. I'm wondering if it's my code or has something to do with loading the dll file. My code: #include "SpaceGame.h" #include <ft2build.h> #include FT_FREETYPE_H //Freetype test FT_Library library; Game::Game(int Width, int Height) { //Freetype FT_Error error = FT_Init_FreeType(&library); if(error) { cout << "Error occured during FT initialisation" << endl; } And my current use of the FreeType2 files. Inside my bin folder (where debug .exe is located) is: freetype6.dll, libfreetype.dll.a, libfreetype-6.dll. In Code::Blocks, I've linked to the lib and include folder of the FreeType 2.3.5.1 version. And included a compiler flag: -lfreetype My program starts perfectly fine if I comment out the FT_Init function which means the includes, and library files should be fine. I can't find a solution to my problem and google isn't helping me so any help would be greatly appreciated.

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• Keeping Aspect Screen Ratio While Stays in Center

  - by David Dimalanta

  I sqw and I tried this suggestion on PISTACHIO BRAINSTORMIN* on how to make a good and adaptive screen ration. For every different screen size, let's say I put the perfect circle as a Texture in LibGDX and played it on screen. Here's the blueberry image example and it's perfectly rounded: When I played it on the Google Nexus 7, the circle turn into a slightly oblonng shape, resembling as it was being flatten a bit. Please observe this snapshot below and you can see the blueberry is almost but slightly not perfectly rounded: Now, when I tried the suggested code for aspect ratio, the perfect circle retained but another problem is occured. The problem is that I expecting for a view on center but instead it's been moved to the right offset leaving with a half black screen. This would be look like this: Here is my code using the suggested screen aspect ratio code: Class' Field // Ingredients Needed for Screen Aspect Ratio private static final int VIRTUAL_WIDTH = 720; private static final int VIRTUAL_HEIGHT = 1280; private static final float ASPECT_RATIO = ((float) VIRTUAL_WIDTH)/((float) VIRTUAL_HEIGHT); private Camera Mother_Camera; private Rectangle Viewport; render() // Camera updating... Mother_Camera.update(); Mother_Camera.apply(Gdx.gl10); // Reseting viewport... Gdx.gl.glViewport((int) Viewport.x, (int) Viewport.y, (int) Viewport.width, (int) Viewport.height); // Clear previous frame. Gdx.gl.glClearColor(0, 0, 0, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); show() Mother_Camera = new OrthographicCamera(VIRTUAL_WIDTH, VIRTUAL_HEIGHT); Was this code useful for screen aspect ratio-proportion fixing or it is statically dependent on actual device's width and height? *see http://blog.acamara.es/2012/02/05/keep-screen-aspect-ratio-with-different-resolutions-using-libgdx/#comment-317

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• Which problem(s) do YOU want to see solved?

  - by buu700

  My team and I are meeting tonight to come up with a business plan and some community input would be amazing. I've been mulling over this issue for the past few months and bouncing ideas off of others, and now I'd finally like some input from the community. I have come up with a fair selection of ideas, but most of those amount to either fun projects which could potentially be profitable, or otherwise solid business models that have one or two major hurdles (usually related to resources or legality). For our team meeting tonight, my idea is to take inventory of our available skills, resources, and compelling problems which interest us. The last is where I would greatly appreciate some community input. Hell, even entire business ideas/plans would be appreciated. No matter how big or small your thoughts, any input would be appreciated. We're a team of computer scientists, so our business will be primarily based around software/technology/Web solutions. Among my relevant available resources (entire Internet aside), I have the following: A pretty reliable connection to an SEO company a large production company. A stash of fairly powerful server hardware. A fast network with static IPs. The backend for Hackswipe, which includes credit card payment processing and a Google Voice-based SMS gateway. This work in progress design for something completely unrelated but which is backed by some fairly decent infrastructure. Direct access to the experts in just about any relevant field (on-campus Carnegie Mellon professors). A sexual relationship with the baron of a small nation. For further down the line, some investor relationships. Not likely to be so relevant, but a decent social media presence (Stack Overflow reputation, modship in some major reddits, various tech forums). The source code for Eugene fucking McCabe. Pooled with the other team members, the list of projects we can build off of would be longer (including an Android app). So, what are your thoughts? Crossposted to reddit

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• How can I find the shortest path between two subgraphs of a larger graph?

  - by Pops

  I'm working with a weighted, undirected multigraph (loops not permitted; most node connections have multiplicity 1; a few node connections have multiplicity 2). I need to find the shortest path between two subgraphs of this graph that do not overlap with each other. There are no other restrictions on which nodes should be used as start/end points. Edges can be selectively removed from the graph at certain times (as explained in my previous question) so it's possible that for two given subgraphs, there might not be any way to connect them. I'm pretty sure I've heard of an algorithm for this before, but I can't remember what it's called, and my Google searches for strings like "shortest path between subgraphs" haven't helped. Can someone suggest a more efficient way to do this than comparing shortest paths between all nodes in one subgraph with all nodes in the other subgraph? Or at least tell me the name of the algorithm so I can look it up myself? For example, if I have the graph below, the nodes circled in red might be one subgraph and the nodes circled in blue might be another. The edges would all have positive integer weights, although they're not shown in the image. I'd want to find whatever path has the shortest total cost as long as it starts at a red node and ends at a blue node. I believe this means the specific node positions and edge weights cannot be ignored. (This is just an example graph I grabbed off Wikimedia and drew on, not my actual problem.)

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• Startup/Shutdown time in Xubuntu is increasing!

  - by Ankit

  I am a novice Xubuntu user on a dual-boot machine. The other OS I have is Windows 7. When I first began using Xubuntu, I had really fast startup and shutdown (much much faster than Windows 7 :) ). However, as I started using it more and more for my work, these times started rising. I do not have any problems with execution speed of running applications. My main concern is the shutdown time. Now it has gone above Windows shutdown time [startup time has only partially increase compared to shutdown]. I checked some similar questions like this. However, they seem to not answer my concern as I feel that the concerned users there experience a long wait before the screen goes blue. In my case, the screen goes blue (desktop session ends a blue screen with a moving slider appears) pretty fast. However, it remains blue for a long time. Another answer that I saw on google was to use dmesg and then stopping some services that I do not want. However, me being a novice could not completely understand what it meant

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