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  • Installing Oracle11gr2 on redhat linux

    - by KItis
    I have basic question about installing applications on linux operating system. i am going to express my issue considering oracle db installation as a example. when installing oracle database , i created a user group called dba and and user in this group called ora112. so this users is allowed to install database. so my question is if ora112 uses umaks is set to 077, then no other uses will be able to configure oracle database. why do we need to follow this practice. is it a accepted procedure in application installation on Linux. please share your experience with me. thanks in advance for looking into this issue say i install java application on this way. then no other application which belongs to different user account won't be able use java running on this computer because of this access restriction.

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  • How to tell from what Ubuntu or Debian repository a package comes?

    - by gotgenes
    On a Debian-based system, including Ubuntu, how can one tell which repository a package will be downloaded from, without actually beginning the download? aptitude show and apt-cache info will show the section (e.g., metapackage, base, graphics), but not the repository to which a package belongs (e.g., http://ppa.launchpad.net/mactel-support/ppa/ubuntu or http://us.archive.ubuntu.com/ubuntu/). When installing the package, the actual repository appears during the download (it is printed out in the "downloading from ..." output from apt and similar programs), but how can one obtain information on the repository containing the package (or a specific version of a package) without downloading and installing it first? Additionally, how can one determine the source repository for a package that is already installed?

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  • What to do when you can not type a letter in Cygwin/bash

    - by Stenemo
    I had a very strange issue that happened as I was editing .bashrc or possible .profile, which made it impossible to press the letter "a" (it is not showing up on screen, although I am able to type it in all other programs as usual. I am not sure, but I was trying to get aliases to work on my computer at the time, so it is possible that I somehow aliased a to "", although I am not sure how that would have happened. I solved this by copying all the files in "cygwin\etc\skel\" (these are the backup starting files in case you ever need to replace them) into my home folder. Just leaving this question here so that other people which run into the same problem know what to do, not sure why I am unable to press "solve your question" at the moment, but I hope that someone who reads this knows how to edit this question so that the next person with this problem knows what to do. Also, not sure if this belongs in this forum or another one, but guess it is more of a unix question.

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  • Hard Disk recovery

    - by Shaihi
    I have 3 disks of the same type model and year of production. All the disks were used part of a generic solution of an IBM server solution. My problem is that all 3 disks suffered the same malfunction at the same exact time and are now dis-functional. I went to two different expert's laboratories and got the same answer: To recover the data they need another identical disk from which they can take spare parts. Can my case really be that clinical? Anyway, I am not sure if this question belongs to this forum, but I am looking to buy the following disk: IIBM ESERVER XSERIES IBM P/N 24P3707 IBM FRU 24P3708 146.8GB USCSI 10K RPM PART NOMBER 9V2005-027 I already bought a disk with the same part number, but the labs said that apparently I need a disk that was manufactured in the same factory. That means that all the numbers have to be exactly the same. If anybody know where I can purchase such a disk (the information on the lost disks is really important to me), please tell me the place.

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  • Missing subject field values in user certificate (Windows)

    - by nwang
    I am trying to enroll (on behalf of) a user certificate but certain fields appear to be missing in the subject field. Specifically, O and OU. Using ADSI, I see that the fields have the values I want but when I generate the certificate using Enroll on Behalf, certreq.exe, or certmgr.msc (run as different user) O does not appear at all and OU values are the AD containers the user account belongs to. This occurs despite my specifying the values in my .inf for certreq and setting the values in certificate properties when using certmgr.msc. Am I missing something or could I have configured something wrong? I am using an in internal CA.

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  • Unidentified Window OnStartup

    - by CMP
    Every time I start up windows vista lately, I see a random floating window. It is a tiny little window with no title, and only the resize, maximize and restore buttons. I'd post an image, but I don't have reputation here yet. I can close it, and it does indeed go away, but I would love to figure out what it is and stop it from popping up at all. I used Autohotkey's window spy on it and all I learned is that it is a swing window, which doesn't help me out a whole lot. Is there a good way to identify which process it belongs to and figure out how to kill it?

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  • Trac permission denied for SVN repo

    - by plesatejvlk
    I'm running Apache2,SVN & Trac on OpenSUSE. SVN works like a charm. I've initialized trac environment for one of my SVN repositories for trac to show source code in it's repo browser and I set the repository up in the Trac web admin. I also ran the trac-admin resync for that repo without problems. Trouble is when I open the Trac repo browser I get: "can't open file: /srv/svn/repos/myrepo/format, access denied)" error. I checked the permissions and: apache runs as wwwrun tracd runs as wwwrun the whole subtree /srv/svn/... belongs to svn group and the group has rw perms all the way down to the "format" file wwwrun is in the svn group I also did the perms check: $ sudo -u wwwrun cat /srv/svn/repos/myrepo/format and got it printed out without trouble. So in my opinion there shoud not be any permission conflict. Any idea what else to check? Thanks in advance!

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  • Is the console command cd a wildcard of sorts? [closed]

    - by Spiritios
    I was wondering while developing some application (though this is not a development question) if the cd command used in Windows is a wildcard or cross-platform command of sorts. I looked up on table with comands for Unix/Linux and MAC OS X and it turns out that it seems to be there. I am not a multi-os user, so I ask if anyone with experience in different OSes can tell me: If this command really exists and works If it has the same functionality (change directory) If there are any problems with its use If in any OS there is another command-line command that does the same in a better/more elaborate/more frequetly used way. Thanks in advance! (P.S.I am not 100% sure if this question belongs to this site or some other stackexchange site...) (P.P.S Any help in tagging this will be appreciated!)

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  • How to change memory for DomU runtime

    - by saffron
    I have a xen server with xen-4.1.3, linux-image-3.2.0-3-amd64, debian squeeze and 16Gb of RAM. The domain-0 has 1Gb of ram, the rest of memory belongs to the hypervisor. I want to start a guest domain with a minimal amount of memory and increase it runtime later. When I start a guest domain with 256Mb of ram and run xm mem-set domu 4Gb, I get ~3Gb only in domu and a guest domain free says: root@test:~# free total used free shared buffers cached Mem: 2830620 72868 2757752 0 2432 43504 -/+ buffers/cache: 26932 2803688 Swap: 1048572 0 1048572 And a guest domain dmesg says: [ 0.000000] Memory: 175912k/2883584k available (3527k kernel code, 448k absent, 2707224k reserved, 3210k data, 612k init) When I start a guest domain with 2Gb of ram I can run xm mem-set domu 7Gb and get ~7Gb of ram in a guest domain: root@test:~# free total used free shared buffers cached Mem: 6828228 74944 6753284 0 1328 12568 -/+ buffers/cache: 61048 6767180 Swap: 1048572 0 1048572 And a guest domain dmesg: [ 0.000000] Memory: 1674960k/16651264k available (3527k kernel code, 448k absent, 14975856k reserved, 3210k data, 612k init) How can I start a guest domain with a minimal amount of ram (256Mb) and increase it under 15Gb?

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  • how to trace an outlook mail not arriving to its destination when is sent to another domain?

    - by Alex. S.
    Hi, I have an domain account configured with Ipower.com. If I use an email client such as Evolution, the mails arrive as expected. However if I use Outlook 2007 (as everybody in this company) the mails only arrive if the destination belongs to the same domain. That means when the destination is a gmail address, for example, the test email falls into a sort of black hole... This is just a simple ipower setup, nothing of Exchange or something like that. What else can I do to isolate and fix this issue? This is driving me nuts because in other email client with the same exact configuration in the same machine, everything works well and I need to fix the thing in Outlook.

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  • Persistance JDO - How to query a property of a collection with JDOQL?

    - by Sergio del Amo
    I want to build an application where a user identified by an email address can have several application accounts. Each account can have one o more users. I am trying to use the JDO Storage capabilities with Google App Engine Java. Here is my attempt: @PersistenceCapable @Inheritance(strategy = InheritanceStrategy.NEW_TABLE) public class AppAccount { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; @Persistent private String companyName; @Persistent List<Invoices> invoices = new ArrayList<Invoices>(); @Persistent List<AppUser> users = new ArrayList<AppUser>(); // Getter Setters and Other Fields } @PersistenceCapable @EmbeddedOnly public class AppUser { @Persistent private String username; @Persistent private String firstName; @Persistent private String lastName; // Getter Setters and Other Fields } When a user logs in, I want to check how many accounts does he belongs to. If he belongs to more than one he will be presented with a dashboard where he can click which account he wants to load. This is my code to retrieve a list of app accounts where he is registered. public static List<AppAccount> getUserAppAccounts(String username) { PersistenceManager pm = JdoUtil.getPm(); Query q = pm.newQuery(AppAccount.class); q.setFilter("users.username == usernameParam"); q.declareParameters("String usernameParam"); return (List<AppAccount>) q.execute(username); } But I get the next error: SELECT FROM invoices.server.AppAccount WHERE users.username == usernameParam PARAMETERS String usernameParam: Encountered a variable expression that isn't part of a join. Maybe you're referencing a non-existent field of an embedded class. org.datanucleus.store.appengine.FatalNucleusUserException: SELECT FROM com.softamo.pelicamo.invoices.server.AppAccount WHERE users.username == usernameParam PARAMETERS String usernameParam: Encountered a variable expression that isn't part of a join. Maybe you're referencing a non-existent field of an embedded class. at org.datanucleus.store.appengine.query.DatastoreQuery.getJoinClassMetaData(DatastoreQuery.java:1154) at org.datanucleus.store.appengine.query.DatastoreQuery.addLeftPrimaryExpression(DatastoreQuery.java:1066) at org.datanucleus.store.appengine.query.DatastoreQuery.addExpression(DatastoreQuery.java:846) at org.datanucleus.store.appengine.query.DatastoreQuery.addFilters(DatastoreQuery.java:807) at org.datanucleus.store.appengine.query.DatastoreQuery.performExecute(DatastoreQuery.java:226) at org.datanucleus.store.appengine.query.JDOQLQuery.performExecute(JDOQLQuery.java:85) at org.datanucleus.store.query.Query.executeQuery(Query.java:1489) at org.datanucleus.store.query.Query.executeWithArray(Query.java:1371) at org.datanucleus.jdo.JDOQuery.execute(JDOQuery.java:243) at com.softamo.pelicamo.invoices.server.Store.getUserAppAccounts(Store.java:82) at com.softamo.pelicamo.invoices.test.server.StoreTest.testgetUserAppAccounts(StoreTest.java:39) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Any idea? I am getting JDO persistance totally wrong?

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  • How to do URL authentication in struts2

    - by Enrique Malhotra
    Hi, I am using struts2.1.6 + Spring 2.5 I have four modules in my application. Registration Module Admin Module Quote Module Location Module. In registration module the customer can register himself and only after registering he is supposed to have access of the remaining three modules. I want to implement something like if the action being called belongs to the registration module it will work as normal but if the action being called belongs to the rest of those three modules it first should check if the user is logged-in and session has not timed-out. if yes it should proceed normally otherwise it should redirect to the login page. Through research I have found out that interceptors could be used for this purpose but before proceeding I thought its better to get some feedback on it from experts. Please suggest how it should be done and If possible put some code suggestions. Here is my struts.xml file(The struts.xml contains four different config files belonging to each module): <struts> <include file="struts-default.xml" /> <constant name="struts.i18n.reload" value="false" /> <constant name="struts.objectFactory" value="spring" /> <constant name="struts.devMode" value="false" /> <constant name="struts.serve.static.browserCache" value="false" /> <constant name="struts.enable.DynamicMethodInvocation" value="true" /> <constant name="struts.multipart.maxSize" value="10000000" /> <constant name="struts.multipart.saveDir" value="C:/Temporary_image_location" /> <include file="/com/action/mappingFiles/registration_config.xml" /> <include file="/com/action/mappingFiles/admin_config.xml" /> <include file="/com/action/mappingFiles/quote.xml" /> <include file="/com/action/mappingFiles/location_config.xml" /> </struts> The sample registration_config.xml file is: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="registration" extends="struts-default" namespace="/my_company"> <action name="LoginView" class="registration" method="showLoginView"> <result>....</result> <result name="input">...</result> </action> </package> </struts> The sample admin_config.xml file is: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <package name="admin" extends="struts-default" namespace="/my_company"> <action name="viewAdmin" class="admin" method="showAdminView"> <result>....</result> <result name="input">...</result> </action> </package> </struts> Same code is there in the rest of two struts2 xml config files. I have used the same namespace in all the four config files with the different package names(As you can see)

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  • What approaches exist to setting up continent/country/city drop down menus?

    - by Dave
    How easy (or difficult) is it to have a Continent/Country/City drop down menu? Where one select from Drop Down Menus (for example): 1 - Europe 2 - UK 3 - London and then writes the Province/Area (for example: Essex). Realistically, how long should it take an experienced web developer to write the code of the above, as well as to link this selection to a Browse function and database storing? I do not have a geographical database yet and I am wondering what the fastest and cheapest way to add it to the drop down menu is. Is there any way to get that geographical database for free? I can see this type of geographical drop down menu in thousands of websites, but I am struggling as to how to implement it ASAP. Follow Up: Tks All x your answers and comments so far. I hear what you are saying. I understand that there are rare occasions of Countries with multiple (same) name Cities and that it might be disputable whether a Country belongs to a certain Continent/Region or not (see Russia x example, Europe or Asia?). Anyway, please take a look, for instance, at this website Sign UP screen http://www.couchsurfing.org/register.html My question then is: Where do I get that list (Country/Cities) and how do I create that _array? Manually copying it somewhere else (which would take me ages) or are there ready made lists that can be downloaded from somewhere for free?

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  • One More Solar Eclipse Hitting The Earth

    - by Suganya
    After the partial Solar eclipse that occurred on 01 July 2011, there is one another partial solar eclipse hitting the earth on 25 November 2011. This is the fourth and the final solar eclipse that is going to happen during this year. This eclipse is highly visible from the southern hemisphere, which means it can be witnessed from Southern South Africa, Antarctica , Tasmania and Many regions of New Zealand. The eclipse touches a greatest magnitude of 0.905 at 06:20:17 am Universal Time. This eclipse is the 53rd eclipse and belongs to Saros123 series. The details about the time and place from where this eclipse can be addressed are given below. All time mentioned here are local time of that location. S.No Place Eclipse Start Time Eclipse End Time Maximum Eclipse 1 Cape Town, South Africa 6:28:07 7:18:08 6:52:42 2 Port Elizabeth, SOUTH AFRICA 6:38:16 7:07:49 6:52:56 3 Christchurch, NEW ZEALAND 19:07:01 19:42 19:42 4 Wellington, NEW ZEALAND 19:10:22 19:26 19:26 5 Dunedin, NEW ZEALAND 19:03:13 19:58 19:40:40 This is the largest partial eclipse that is going to hit the earth this year and while at the maximum eclipse time, the lunar shadow will pass 330 kilometers above the earth’s surface near the coast of Antarctica. Source : NASA CC Image Credit : Joerg Weingrill This article titled,One More Solar Eclipse Hitting The Earth, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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  • A client wants us to screen work machines for pornography. Is it possible?

    - by Scant Roger
    A long-time client has asked us to help screen their work machines for pornography. They're worried about liability if sensitive materials were found. Their main concerns (for obvious reasons) are video, audio, and image files. If possible, they'd also like to scan text-based documents for inappropriate content. They have a hierarchy of not-for-work content starting with blatantly illegal (I don't have to list details), moving down to obviously offensive, and also including things that may be offensive to some - think lingerie ads, joke cards featuring butt cracks, and anything related to Howie Mandel. My questions are: Is this ethical? I think it is since every employee legally agrees that their work machine belongs to the company and is subject to search. The screenings are not to occur on personal machines brought to work. Is it feasible? I've done a lot of image processing/indexing but this seems like a whole new world of complexity. Any references to successful techniques for discovering porn? Is it appropriate for me to archive the results when something is discovered?

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  • Win a Free License for Windows 7 Ultimate or Silverlight Spy at Our West Palm Beach .Net User Group

    - by Sam Abraham
    Shervin Shakibi, Microsoft Regional Director, ASP.Net MVP and Microsoft Certified Trainer will be our speaker at our West Palm Beach .Net User Group May meeting,  Shervin founded the FlaDotNet Users Group Network to which our West Palm Beach .Net User Group belongs. Shervin will be talking to us about the new features of Silverlight 4.0. I am personally looking forward to attending this event as I have always found Shervin's talks fun and a great learning experience.   At the end of our meeting, we will be having a free raffle. We will be giving away 1 free Windows 7 Ultimate license and 2 free Silverlight Spy licenses as well as several books and other giveaways. Usually, everybody goes home with a freebie.  We will also continue having ample networking time while enjoying free pizza/soda sponsored by Sherlock Technology and SISCO Corporation who is a new sponsor of our group.   Koen Zwikstra, Silverlight MVP and Founder of First Floor Software has kindly offered the West Palm Beach .Net User Group several free licenses of Silverlight Spy to raffle during our meetings. We will start by raffling two copies during our May meeting.   Silverlight Spy is a very valuable tool in debugging Silverlight applications. It has been mentioned at MIX10 ( http://firstfloorsoftware.com/blog/silverlight-spy-at-mix10/) as well as by Microsoft Community Leaders (http://blogs.msdn.com/chkoenig/archive/2008/08/29/silverlight-spy.aspx)   I am using Silverlight Spy myself and will probably be using it to demonstrate Silverlight internals during my talks. I think Koen's gift to our group will bring great value to our fortunate members who end up winning the licenses. Thank you Koen for your kind gift and looking forward to meeting you all on May 25th 2010 6:30 PM at CompTec (http://www.fladotnet.com/Reg.aspx?EventID=462)   Sam Abraham Site Director - West Palm Beach .Net User Group

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  • Rails/Node.js interaction

    - by lpvn
    I and my co-worker are developing a web application with rails and node.js and we can't reach a consensus regarding a particular architectural decision. Our setup is basically a rails server working with node.js and redis, when a client makes a http request to our rails API in some cases our rails application posts the response to a redis database and then node.js transmits the response via websocket. Our disagreement occurs in the following point: my co-worker thinks that using node.js to send data to clients is somewhat business logic and should be inside the model, so in the first code he wrote he used commands of broadcast in callbacks and other places of the model, he's convinced that the models are the best place for the interaction between rails and node. I on the other hand think that using node.js belongs to the runtime realm, my take is that the broadcast commands and other node.js interactions should be in the controller and should only be used in a model if passed through a well defined interface, just like the situation when a model needs to access the current user of a session. At this point we're tired of arguing over this same thing and our discussion consists in us repeating to ourselves our same opinions over and over. Could anyone, preferably with experience in the same setup, give us an unambiguous response saying which solution is more adequate and why it is?

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  • Order of operations to render VBO to FBO texture and then rendering FBO texture full quad

    - by cyberdemon
    I've just started using OpenGL with C# via the OpenTK library. I've managed to successfully render my game world using VBOs. I now want to create a pixellated affect by rendering the frame to an offscreen FBO with a size half of my GameWindow size and then render that FBO to a full screen quad. I've been looking at the OpenTK example here: http://www.opentk.com/doc/graphics/frame-buffer-objects ...but the result is a black form. I'm not sure which parts of the example code belongs in the OnLoad event and OnRenderFrame. Can someone please tell me if the below code shows the correct order of operations? OnLoad { // VBO. // DataArrayBuffer GenBuffers/BindBuffer/BufferData // ElementArrayBuffer GenBuffers/BindBuffer/BufferData // ColourArrayBuffer GenBuffers/BindBuffer/BufferData // FBO. // ColourTexture GenTextures/BindTexture/TexParameterx4/TexImage2D // Create FBO. // Textures Ext.GenFramebuffers/Ext.BindFramebuffer/Ext.FramebufferTexture2D/Ext.FramebufferRenderbuffer } OnRenderFrame { // Use FBO buffer. Ext.BindFramebuffer(FBO) GL.Clear // Set viewport to FBO dimensions. GL.DrawBuffer((DrawBufferMode)FramebufferAttachment.ColorAttachment0Ext) // Bind VBO arrays. GL.BindBuffer(ColourArrayBuffer) GL.ColorPointer GL.EnableClientState(ColorArray) GL.BindBuffer(DataArrayBuffer) // If world changed GL.BufferData(DataArrayBuffer) GL.VertexPointer GL.EnableClientState(VertexArray) GL.BindBuffer(ElementArrayBuffer) // Render VBO. GL.DrawElements // Bind visible buffer. GL.Ext.BindFramebuffer(0) GL.DrawBuffer(Back) GL.Clear // Set camera to view texture. GL.BindTexture(ColourTexture) // Render FBO texture GL.Begin(Quads) // Draw texture on quad // TexCoord2/Vertex2 GL.End SwapBuffers }

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  • How best to handle ID3D11InputLayout in rendering code?

    - by JohnB
    I'm looking for an elegant way to handle input layouts in my directx11 code. The problem I have that I have an Effect class and a Element class. The effect class encapsulates shaders and similar settings, and the Element class contains something that can be drawn (3d model, lanscape etc) My drawing code sets the device shaders etc using the effect specified and then calls the draw function of the Element to draw the actual geometry contained in it. The problem is this - I need to create an D3D11InputLayout somewhere. This really belongs in the Element class as it's no business of the rest of the system how that element chooses to represent it's vertex layout. But in order to create the object the API requires the vertex shader bytecode for the vertex shader that will be used to draw the object. In directx9 it was easy, there was no dependency so my element could contain it's own input layout structures and set them without the effect being involved. But the Element shouldn't really have to know anything about the effect that it's being drawn with, that's just render settings, and the Element is there to provide geometry. So I don't really know where to store and how to select the InputLayout for each draw call. I mean, I've made something work but it seems very ugly. This makes me thing I've either missed something obvious, or else my design of having all the render settings in an Effect, the Geometry in an Element, and a 3rd party that draws it all is just flawed. Just wondering how anyone else handles their input layouts in directx11 in a elegant way?

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  • Stereo images rectification and disparity: which algorithms?

    - by alessandro.francesconi
    I'm trying to figure out what are currently the two most efficent algorithms that permit, starting from a L/R pair of stereo images created using a traditional camera (so affected by some epipolar lines misalignment), to produce a pair of adjusted images plus their depth information by looking at their disparity. Actually I've found lots of papers about these two methods, like: "Computing Rectifying Homographies for Stereo Vision" (Zhang - seems one of the best for rectification only) "Three-step image recti?cation" (Monasse) "Rectification and Disparity" (slideshow by Navab) "A fast area-based stereo matching algorithm" (Di Stefano - seems a bit inaccurate) "Computing Visual Correspondence with Occlusions via Graph Cuts" (Kolmogorov - this one produces a very good disparity map, with also occlusion informations, but is it efficient?) "Dense Disparity Map Estimation Respecting Image Discontinuities" (Alvarez - toooo long for a first review) Anyone could please give me some advices for orienting into this wide topic? What kind of algorithm/method should I treat first, considering that I'll work on a very simple input: a pair of left and right images and nothing else, no more information (some papers are based on additional, pre-taken, calibration infos)? Speaking about working implementations, the only interesting results I've seen so far belongs to this piece of software, but only for automatic rectification, not disparity: http://stereo.jpn.org/eng/stphmkr/index.html I tried the "auto-adjustment" feature and seems really effective. Too bad there is no source code...

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  • ASP.NET MVC: Moving code from controller action to service layer

    - by DigiMortal
    I fixed one controller action in my application that doesn’t seemed good enough for me. It wasn’t big move I did but worth to show to beginners how nice code you can write when using correct layering in your application. As an example I use code from my posting ASP.NET MVC: How to implement invitation codes support. Problematic controller action Although my controller action works well I don’t like how it looks. It is too much for controller action in my opinion. [HttpPost] public ActionResult GetAccess(string accessCode) {     if(string.IsNullOrEmpty(accessCode.Trim()))     {         ModelState.AddModelError("accessCode", "Insert invitation code!");         return View();     }       Guid accessGuid;       try     {         accessGuid = Guid.Parse(accessCode);     }     catch     {         ModelState.AddModelError("accessCode", "Incorrect format of invitation code!");         return View();                    }       using(var ctx = new EventsEntities())     {         var user = ctx.GetNewUserByAccessCode(accessGuid);         if(user == null)         {             ModelState.AddModelError("accessCode", "Cannot find account with given invitation code!");             return View();         }           user.UserToken = User.Identity.GetUserToken();         ctx.SaveChanges();     }       Session["UserId"] = accessGuid;       return Redirect("~/admin"); } Looking at this code my first idea is that all this access code stuff must be located somewhere else. We have working functionality in wrong place and we should do something about it. Service layer I add layers to my application very carefully because I don’t like to use hand grenade to kill a fly. When I see real need for some layer and it doesn’t add too much complexity I will add new layer. Right now it is good time to add service layer to my small application. After that it is time to move code to service layer and inject service class to controller. public interface IUserService {     bool ClaimAccessCode(string accessCode, string userToken,                          out string errorMessage);       // Other methods of user service } I need this interface when writing unit tests because I need fake service that doesn’t communicate with database and other external sources. public class UserService : IUserService {     private readonly IDataContext _context;       public UserService(IDataContext context)     {         _context = context;     }       public bool ClaimAccessCode(string accessCode, string userToken, out string errorMessage)     {         if (string.IsNullOrEmpty(accessCode.Trim()))         {             errorMessage = "Insert invitation code!";             return false;         }           Guid accessGuid;         if (!Guid.TryParse(accessCode, out accessGuid))         {             errorMessage = "Incorrect format of invitation code!";             return false;         }           var user = _context.GetNewUserByAccessCode(accessGuid);         if (user == null)         {             errorMessage = "Cannot find account with given invitation code!";             return false;         }           user.UserToken = userToken;         _context.SaveChanges();           errorMessage = string.Empty;         return true;     } } Right now I used simple solution for errors and made access code claiming method to follow usual TrySomething() methods pattern. This way I can keep error messages and their retrieval away from controller and in controller I just mediate error message from service to view. Controller Now all the code is moved to service layer and we need also some modifications to controller code so it makes use of users service. I don’t show here DI/IoC details about how to give service instance to controller. GetAccess() action of controller looks like this right now. [HttpPost] public ActionResult GetAccess(string accessCode) {     var userToken = User.Identity.GetUserToken();     string errorMessage;       if (!_userService.ClaimAccessCode(accessCode, userToken,                                       out errorMessage))     {                       ModelState.AddModelError("accessCode", errorMessage);         return View();     }       Session["UserId"] = Guid.Parse(accessCode);     return Redirect("~/admin"); } It’s short and nice now and it deals with web site part of access code claiming. In the case of error user is shown access code claiming view with error message that ClaimAccessCode() method returns as output parameter. If everything goes fine then access code is reserved for current user and user is authenticated. Conclusion When controller action grows big you have to move code to layers it actually belongs. In this posting I showed you how I moved access code claiming functionality from controller action to user service class that belongs to service layer of my application. As the result I have controller action that coordinates the user interaction when going through access code claiming process. Controller communicates with service layer and gets information about how access code claiming succeeded.

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  • Which shopping cart / ecommerce platform to choose?

    - by fabien7474
    I need to build an ecommerce website within a tight budget and schedule. Of course, I have never done that before, so I have googled out what my solutions are and I have concluded that the following were not valid candidates anymore : Magento : Steep learning curve osCommerce : old, bad design, buggy and not user-friendly Zencart, CRE Loaded, CubeCart : based on osCommerce Virtuemart, uberCart, eCart : based on CMS (Joomal, Drupal, WordPress) that is not necessary for my use-case So I finally narrowed down my choices to these solutions : PrestaShop : easy-to-use, great templating engine (smarty) but many modules are not free buy yet indispensable OpenCart : security issues and not a great support from the main developer. See here and here. So, as you can see, I am a little bit confused and if you can help me choosing an easy-to-use, lightweight and cheap (not-necessarily free) ecommerce solution, I would really appreciate. By the way, I am a Java/Grails programmer but I am also familiar with PHP and .NET. (not with Python or Ruby/Rails) EDIT: It seems that this question is more appropriate for the Webmaster StackExchange site. So please move this question to where it belongs (I cannot do that) instead of downvoting it. BTW, I have found out a question quite similar on SO (http://stackoverflow.com/questions/3315638/php-ecommerce-system-which-one-is-easiest-to-modify) which is quite popular.

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  • Security Goes Underground

    - by BuckWoody
    You might not have heard of as many data breaches recently as in the past. As you’re probably aware, I call them out here as often as I can, especially the big ones in government and medical institutions, because I believe those can have lasting implications on a person’s life. I think that my data is personal – and I’ve seen the impact of someone having their identity stolen. It’s a brutal experience that I wouldn’t wish on anyone. So with all of that it stands to reason that I hold the data professionals to the highest standards on security. I think your first role is to ensure the data you have, number one because it can be so harmful, and number two because it isn’t yours. It belongs to the person that has that data. You might think I’m happy about that downturn in reported data losses. Well, I was, until I learned that companies have realized they suffer a lowering of their stock when they report it, but not when they don’t. So, since we all do what we are measured on, they don’t. So now, not only are they not protecting your information, they are hiding the fact that they are losing it. So take this as a personal challenge. Make sure you have a security audit on your data, and treat any breach like a personal failure. We’re the gatekeepers, so let’s keep the gates. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • links for 2011-01-07

    - by Bob Rhubart
    Enterprise Software Development with Java: GlassFish 3 vs. JBoss 6 - Is the Web Profile ready for the Enterprise? (tags: ping.fm) Bay Area Coherence Special Interest Group (BACSIG) Jan 20 The Jan 20 meeting of the Bay Area Coherence Special Interest Group (BACSIG) features presentations by Rob Lee (Coherence 3.6 Clustering Features), Rao Bhethanabotla (Efficient Management and Update of Coherence Clusters to Reduce Down Time), and Christer Fahlgren (How To Build a Coherence Practice). (tags: oracle otn coherence sig) Michael T. Dinh: VirtualBox Command Line "I have manually configured VirtualBox Host-Only Ethernet Adapter for static IP. However, the IP can change after reboot which affects connectivity with the Guest with static IP." - Michael T. Dinh (tags: oracle virtualization virtualbox) Michel Schildmeijer: Oracle WebLogic - Configuring DyeInjection Monitor "A fairly unknown tool within WLDF (WebLogic Diagnostic Framework) is the DyeInjection Monitor. With this monitor configured one can track a  user or client address within a WebLogic system." - Michel Schildmeijer (tags: oracle weblogic) David Butler: Master Data Management Implementation Styles "Oracle MDM Solutions provide strong data federation and integration capabilities which are key to enabling the use of the Confederated Hub as a possible architectural style approach." - David Butler (tags: oracle otn softwarearchitecture) Kenneth Downs: Can You Really Create A Business Logic Layer? "Don't be afraid to use the database for what it is good for, and leave the arguments about "where everything belongs" to those with too much time on their hands." - Kenneth Downs (tags: businesslogic database softwarearchitecture) IASA Perspectives Magazine - Fall 2010 Fall 2010 edition of International Association of Software Architects (IASA) Perspectives magazine: (tags: softwarearchitecture iasi entarch) Using the DB Adapter in Oracle SOA Suite: returning status information "In this tutorial I will show you an example of how how can implement this within the Oracle SOA Suite (and because the DB Adapter can also be used within the Oracle Service Bus, the principles also apply to implementing it within the OSB)." - Henk Jan van Wijk (tags: oracle otn soa soasuite database) 4th International SOA Symposium + 3rd International Cloud Symposium by Thomas Erl - call for presentations (SOA Partner Community Blog) The International SOA and Cloud Symposium brings together lessons learned and emerging topics from SOA and Cloud projects, practitioners and experts. The two-day conference agenda will be organized into several tracks. (tags: oracle otn soa cloud)

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  • Aggregating Excel cell contents that match a label [migrated]

    - by Josh
    I'm sure this isn't a terribly difficult thing, but it's not the type of question that easily lends itself to internet searches. I've been assigned a project for work involving a complex spreadsheet. I've done the usual =SUM and other basic Excel formulas, and I've got enough coding background that I'm able to at least fudge my way through VBA, but I'm not certain how to proceed with one part of the task. Simple version: On Sheet 1 I have a list of people (one on each row, person's name in column A), on sheet 2 I have a list of groups (one on each row, group name in column A). Each name in Sheet 1 has its own row, and I have a "Data Validation" dropdown menu where you choose the group each person belongs to. That dropdown is sourced from Sheet 2, where each group has a row. So essentially the data validation source for Sheet 1's "Group" column is just "=Sheet2!$a1:a100" or whatever. The problem is this: I want each group row in Sheet 2 to have a formula which results in a list of all the users which have been assigned to that group on Sheet 1. What I mean is something the equivalent of "select * from PeopleTab where GROUP = ThisGroup". The resulting cell would just stick the names together like "Bob Smith, Joe Jones, Sally Sanderson" I've been Googling for hours but I can't think of a way to phrase my search query to get the results I want. Here's an example of desired result (Dash-delimited. Can't find a way to make it look nice, table tags don't seem to work here): (Sheet 1) Bob Smith - Group 1 (selected from dropdown) Joe Jones - Group 2 (selected from dropdown) Sally Sanderson - Group 1 (selected from dropdown) (Sheet 2) Group 1 - Bob Smith, Sally Sanderson (result of formula) Group 2 - Joe Jones (result of formula) What formula (or even what function) do I use on that second column of sheet 2 to make a flat list out of the members of that group?

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