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• Apache Virtualhost entry with Windows hostname

  - by gshauger

  I have a Windows Domain Controller and we use it for DNS for our internal network. I have an Ubuntu box with an IP address of 172.16.34.149. Within the Windows DNS I created the forward and reverse lookup entries for the name Endymion. Naturally when ever I FTP/SSH/HTTP/etc to the hostname Endymion it resolves correctly to my Ubuntu box. I wanted to do some web development on this box for an existing site. There were problems when I placed the website in a subfolder of /var/www/. Let's just say it was in folder /var/www/projectx/. The issue involved the incorrect resolution of non-relative urls. So I figure I could create a new DNS entry for the hostname projectx. Sure enough when I FTP/SSH/HTTP/etc to the hostname projectx it takes me to the same ubuntu box as the hostname Endymion...this is what I would expect. I now have two hostnames for the same box. I then create a Virtualhost entry in httpd.conf that looks like the following: <VirtualHost *:80> DocumentRoot /var/www/projectx ServerName projectx ServerAlias projectx </VirtualHost> Sure enough when I go to a browser and type in http://projectx/ it takes me to the correct subfolder. Everything works!!! Not so fast. I then go to http://endymion/ and instead of taking me to /var/www/ it takes me to /var/www/projectx/ Clearly I'm missing something. Help please! ;)

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• How to set up a server without a hosting control panel

  - by A4J

  I have always used a control panel on my dedicated servers - from cPanel to Plesk to Virtualmin, and I am now considering ditching a CP altogether and manually editing config files. My requirements are fairly simple, I will host multiple sites on the server; some Apache with PHP & Mysql and some Passenger with Rails & Postgres. All will require email smtp/pop. FTP/Stats will not be required. Could someone please give me a quick run-down of what I would need to do - in terms of installing software and configuration? My server will come with a base install of CentOS 6.4 minimal. My thoughts so far: Install/update latest versions of MySQL & Postgres (are they 'safe' out of the box? Or do I need to do anything else like set up root passwords etc?) Install Apache & PHP (again, are the base installs good to go or do they require security tweaks?) Set up nameservers/hostnames/reverse DNS etc (Any guides on how to do this please?) Install Rubygems Install and configure Dovecot and Postfix (any tips on doing this? Or links to how-tos that cover it please?) Set up each website - any links to guides on how to do this? Install/configure firewall (or is the default install good to go?) Any other tips or advice would be greatly appreciated, as would links to guides or how-tos.

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• mod_rewrite with AJAX applictions: possible?

  - by MrJackV

  I am trying to run Shell In a Box (link) through another server (the computer running shellinabox is not accessible from the internet) . Ideally I could use ProxyPass in the Apache config to have a reverse proxy. Problem is I can't access the conf file. So I tried using .htaccess and I discover that I cannot use ProxyPass in there. So I tried and used mod_rewrite to do the job. Currently I have the following on the .htaccess file RewriteEngine On RewriteRule ^$ http://10.1.13.236:4200/ [P] However while it displays the title correctly and if I open up the source code I can see there is something in the page, nothing is diplayed on the screen (it remains blank). My suspicion is that there are problems with AJAX and this kind of proxy. What I am trying to accomplish with the mod_rewrite as close as possible behaviour to ProxyPass (Mirorr a website in a subdirectory). Is this possible? Is there some other solution (I tried phproxy and khproxy but neither of them is able to display anything)? Thanks in advance

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• Duplicate forwarded messages in Blackberry when using BIS

  - by Avery Payne

  Our Setup External email arrives at a Postfix server, is scanned, and then forwarded via settings in transport (using the RELAY:[{ip-address}] for a given address) to an Exchange 2007 server. Some users are on Exchange, but a few are still on the Postfix server (they will be moved in the near future). IMAPS is provided for external connections via Dovecot; in-house, IMAP is provided for the Gateway and native MAPI is used for Exchange/Outlook. Blackberries are connected via BIS, which uses Dovecot as a reverse-proxy IMAPS service to connect to Exchange (when the mailbox exists on Exchange, otherwise it connects to the mailbox on the gateway). The Issue We have a user that, when they forward an email on their Outlook client, they get a duplicate of the original message on their Blackberry. When I say duplicate, I mean that they have a copy of the forwarded version of the message (i.e. their version of the message that they obtained hitting the forward button), and a copy of the original message that shows up at the same time. The expected behavior is to just see the forwarded message, not the forwarded message and a 2nd copy of the original message. We've only seen this with Outlook users that also have a Blackberry. Other IMAP clients, such as OS X Mail or Thunderbird, do not exhibit this behavior when connecting to the Exchange server; forwarded messages work as expected. The Questions what is causing this to happen? why does it only affect Outlook/Blackberry setups, and not TBird/Blackberry or OSX-Mail/Blackberry? how do we get it to stop, before people go insane and never forward messages again?

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• How is it possible to list all folders that a particular user/group has permissions on?

  - by Lord Torgamus

  Is it possible to list all folders/files that a given group has explicit permissions on, for a machine running Windows Server 2003? If so, how? It would be nice to see inherited permissions as well, but I could do with just explicit permissions. A little background: I'm trying to update groups/permissions on a test server. One of the groups, Devs, wasn't implemented correctly when it was created, and my goal is to remove it from the system. It has been replaced by LeadDevelopers, which has permissions on many — but naturally not all — of the same folders. I want to make sure that I don't accidentally orphan any folders or cause any other issues when I remove Devs. It did have some admin-level permissions. EDIT: The answers so far — at least *cacls and AccessEnum — provide a way to find out which groups/users have permissions on known directories/files. I actually want the reverse of this behavior: I know the group, and I'm looking for the directories/files for which the group has permissions. Also, as I noted in a comment, the Devs group is not itself a member of any other group.

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• Redirect without changing URL

  - by Coobadivin

  Here's the setup. We have a hardware load balancer with an http virtual cluster. Let's call this virtual cluster example1.com. This virtual cluster load balances between two squid reverse proxies which are also on the same physical servers as the web servers. Squid listens on 80 and points to itself as the cache_peer web server which listens on 81. We also have a standalone web server which we will call example2.com. What we are trying to do is create a subdirectory on example1.com called example1.com/example2. This will point to example2.com, but we want our users to stay at example1.com/example2 in their browser. So, it's like a redirect without actually being a redirect. How the hell do I go about doing this? Is this even possible? I'm looking at squid docs in the meantime. example1.com is running a proprietary web server - not Apache :( We can't host example2.com's content in example1.com's file system. These are two very different platforms.

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• very slow connection to ssh server from client (but not other servers)

  - by AntonOfTheWoods

  I have an Ubuntu 12.04 laptop that is taking so long to connect to various servers (in different data centres) that it seems like a bit of a lottery whether I'll actually get a connection. If I connect to the servers between themselves it's instantaneous, and I've set UseDNS no AddressFamily inet On the servers I'm connecting to (and rebooted for good measure). I also put in the reverse DNS+IP of the cable connection I'm connecting from. If I connect from the laptop via telnet: telnet my.server 22 Then the connection is also instantaneous, so it doesn't appear to be a problem with an intervening firewall. I have the same behaviour whether I connect with the IP, a short name in my hosts or the FQDN. I'm connecting with a 50mbps (cable, sync) connection so that doesn't appear to be the problem, and when I do finally get a connection then it's a good, quick, stable one. I have tried listening on another port (8000) and that makes no difference. Web and other connections from the laptop to the machine are also very good. Does anyone have any ideas here?

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• A duplicate name has been detected on the TCP network

  - by MSedm

  When I installed my domain controller and DNS, I had 2 NIC on the server. Both NIC has its own IP address. NICs are not teamed, they are seperate and ip address are in the same subnet. Both IP address are now registered in the DNS. i found them in Forward and reverse lookup zone. Everything working ok except the following error in the event log. "A duplicate name has been detected on the TCP network......" Now I have realized that this is because of the second NIC. My question is if i disable the second NIC, what happen to those DNS record assiciated with the second ip address? How do I remove all the DNS recored for the disabled NIC? There are A record, some record with the name (same as parent folder), PTR record and may be more. How do i disable second NIC and remove all the associated DNS recoreds? Please help.

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• Strategy to isolate multiple nginx ssl apps with single domain via suburi's?

  - by icpu

  Warning: so far I have only learnt how to use nginx to serve apps with their own domain and server block. But I think its time to dive a little deeper. To mitigate the need for multiple SSL certificates or expensive wildcard certificates I would like to serve multiple apps (e.g. rails apps, php apps, node.js apps) from one nginx server_name. e.g. rooturl/railsapp rooturl/nodejsapp rooturl/phpshop rooturl/phpblog I am unsure on ideal strategy. Some examples I have seen and or thought about: Multiple location rules, this seems to cause conflicts between the individual app config requirements, e.g. differing rewrite and access requirements Isolated apps by backend internal port, is this possible? Each port routing to its own config? So config is isolated and can be bespoke to app requirements. Reverse proxy, I am little ignorant of how this works, is this what I need to research? is this actually 2 above? Help online seems to always proxy to another server e.g apache What is an effective way to isolate config requirements for apps served from a single domain via sub uris?

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• How can I document and automate a system's configuration?

  - by Diomidis Spinellis

  Having a system's configuration represented by its current state is risky, inefficient, and opaque. At some point you may be left with an unsupported system and no upgrade path. Then configuring a new system compatible with the old is a process or trial and error. Furthermore, if at some point the system is damaged the only option is to go back to the most recent full backup, and try to remember what changes followed from that point. Also, the only way to create a system compatible with the original is through a complete dump/restore. Finally, in such a setup there's no way to know how you solved a particular problem; the only thing you can do is to look at the corresponding configuration files and try to guess what you changed to achieve the desired effect. Currently for each system I maintain, I keep a log file where I record all system administration activity, starting from the installation: installation options, added packages, changes in configuration files, updates, problem fixes etc. In theory this allows me to (manually) replay all changes to arrive at the current state, or to unroll an erroneous change by executing the reverse commands. However, this process is also inefficient, error-prone, and relies on human judgment. Another thing I've tried is to put /etc configuration files under version control with git. This helps me document the changes automatically and also apply them on a clean setup. But it's not without problems: git has to run under sudo, passwords and private keys may be stored in the repository, installed packages can't be meaningfully tracked, and git will have a fit if I try to extend this approach to all the system's directories. I've also thought about performing all changes through shell scripts or makefiles, but I think this process will require a lot of effort and will be fragile. Are there some better methods or tools that I'm missing?

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• What good technology podcasts are out there?

  - by Michael Stum

  Yes, Podcasts, those nice little Audiobooks I can listen to on the way to work. With the current amount of Podcasts, it's like searching a needle in a haystack, except that the haystack happens to be the Internet and is filled with too many of these "Hot new Gadgets" stuff :( Now, even though I am mainly a .NET developer nowadays, maybe anyone knows some good Podcasts from people regarding the whole software lifecycle? Unit Testing, Continous Integration, Documentation, Deployment... So - what are you guys and gals listening to? Please note that the categorizations are somewhat subjective and may not be 100% accurate as many podcasts cover several areas. Categorization is made against what is considered the "main" area. General Software Engineering / Productivity Stack Overflow TekPub (Requires Paid Subscription) SE Radio 43 Folders Perspectives Dr. Dobb's (now a video feed) The Pragmatic Podcast (Inactive) IT Matters Agile Toolkit Podcast The Stack Trace (Inactive) Parleys Techzing The Startup Success Podcast Berkeley CS class lectures FOSS Weekly .NET / Visual Studio / Microsoft Herding Code Hanselminutes .NET Rocks! Deep Fried Bytes Alt.Net Podcast Polymorphic Podcast Sparkling Client (The Silverlight Podcast) dnrTV! Spaghetti Code ASP.NET Podcast Channel 9 Radio TFS PowerScripting Podcast The Thirsty Developer Elegant Code ConnectedShow Crafty Coders Coding QA jQuery yayQuery The official jQuery podcast Java / Groovy The Java Posse Grails Podcast Java Technology Insider Ruby / Rails Railscasts Rails Envy The Ruby on Rails Podcast Rubiverse Web Design / JavaScript / Ajax WebDevRadio Boagworld The Rissington podcast Ajaxian YUI Theater Unix / Linux / Mac / iPhone Mac Developer Network Hacker Public Radio Linux Outlaws Mac OS Ken LugRadio Linux radio show (Inactive) The Linux Action Show! Linux Kernel Mailing List (LKML) Summary Podcast Stanford's iPhone programming class SysAdmin, Security or Infrastructure RunAs Radio Security Now! Crypto-Gram Security Podcast Hak5 VMWare VMTN Windows Weekly PaulDotCom Security The Register - Semi-Coherent Computing FeatherCast General Tech / Business Tekzilla This Week in Tech The Guardian Tech Weekly PCMag Radio Podcast Entrepreneurship Corner Manager Tools Other / Misc. / Podcast Networks IT Conversations Retrobits Podcast No Agenda Netcast Cranky Geeks The Command Line Freelance Radio IBM developerWorks The Register - Open Season Drunk and Retired Technometria Sod This Radio4Nerds Hacker Medley

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• Cannot get Correct month for a call from call log history

  - by Nishant Kumar

  I am trying to extract information from the call log of the android. I am getting the call date that is one month back from the actual time of call. I mean to say that the information extracted by my code for the date of call is one mont back than the actual call date. I have the following in the Emulator: I saved a contact. Then I made a call to the contact. Code: I have 3 ways of extracting call Date information but getting the same wrong result. My code is as follows: /* Make the query to call log content */ Cursor callLogResult = context.getContentResolver().query( CallLog.Calls.CONTENT_URI, null, null, null, null); int columnIndex = callLogResult.getColumnIndex(Calls.DATE); Long timeInResult = callLogResult.getLong(columnIndex); /* Method 1 to change the milliseconds obtained to the readable date formate */ Time time = new Time(); time.toMillis(true); time.set(timeInResult); String callDate= time.monthDay+"-"+time.month+"-"+time.year; /* Method 2 for extracting the date from tha value read from the column */ Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(time); String Month = calendar.get(Calendar.MONTH) ; /* Method 3 for extracting date from the result obtained */ Date date = new Date(timeInResult); String mont = date.getMonth() While using the Calendar method , I also tried to set the DayLight SAving Offset but it didnot worked, calendar.setTimeZone(TimeZone.getTimeZone("Europe/Paris")); int DST_OFFSET = calendar.get( Calendar.DST_OFFSET ); // DST_OFFSET Boolean isSet = calendar.getTimeZone().useDaylightTime(); if(isSet) calendar.set(Calendar.DST_OFFSET , 0); int reCheck = calendar.get(Calendar.DST_OFFSET ); But the value is not set to 0 in recheck. I am getting the wrong month value by using this also. Please some one help me where I am wrong? or is this the error in emulator ?? Thanks, Nishant Kumar Engineering Student

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• How good is Dotfuscator Community Edition? What is "good enough obfuscator"?

  - by zendar

  I plan to release one small, low priced utility. Since this is more hobby than business, I planned to use Dotfuscator Community Edition that is shipped with VS2008. How good is it? I could also use definition of "good enough obfuscator" - what features are missing from Dotfuscator Community Edition to make it good enough. Edit: I checked pricing on number of commercial obfuscators and they cost a lot. Is it worth it? Are commercial versions that much better protecting from reverse engineering? I'm not very afraid of my application being cracked (it will be disappointing if application is so bad that no one is interested in cracking it). It's not heavily protected anyway, not overly complex serial key and licence checks on few places in code. It just bugs me that without obfuscation, somebody can easily get source code, rebrand it and sell it as its own. Does this happens a lot? Edit 2: Can somebody recommend commercial obfuscator. I found lots of them, all of them are expensive, some even don't have price listed on web site. Feature wise, all products seem more or less similar. What is minimal set of features obfuscator should have?

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• LINQ to Entities exceptions (ElementAtOrDefault and CompareObjectEqual)

  - by OffApps Cory

  I am working on a shipping platform which will eventually automate shipping through several major carriers. I have a ShipmentsView Usercontrol which displayes a list of Shipments (returned by EntityFramework), and when a user clicks on a shipment item, it spawns a ShipmentEditView and passes the ShipmentID (RecordKey) to that view. I initially wrestled with trying to get the context from the parent (ShipmentsView) and finally gave up resolving to get to it later. I wanted to do this to keep a single instance of the context. anyhow, I now create a new instance of the context in my ShipmentEditViewModel, and query against it for the Shipment record. I know I could just pass the record, but I wanted to use the Ocean Framework that Karl Shifflett wrote and don't want to muck about writing new transition methods. So anyhow, I query and when stepping through, I can see that it returns a record, as soon as execution reached the point where it assigned the query result to the e.Result property, it throws up the following exception depending on the query I used. LINQToEntities Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = From ship In _Context.Shipment _ Where ship.ShipID = e.Argument _ Select ship Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select "LINQ to Entities does not recognize the method 'System.Object.CompareObjectEqual(System.Object, System.Object, Boolean)' method, and this method cannot be translated into a store expression. LINQToEntities via Method calls Dim RecordID As Decimal = CDec(e.Argument) Dim myResult = _Context.Shipment.Where(Function(s) s.ShipID = RecordID) Select Case myResult.Count Case 0 e.Result = New Shipment Case 1 e.Result = myResult(0) Case Else e.Result = Nothing End Select LINQ to Entities does not recognize the method 'SnazzyShippingDAL.Shipment ElementAtOrDefault[Shipment] (System.Linq.IQueryable`1[SnazzyShippingDAL.Shipment], Int32)' method, and this method cannot be translated into a store expression. I have been trying to get this thing to display a record for like three days. i am seriously thinking about going back and re=-engineering it without the MVVM pattern (which I realize I am only starting to learn and understand) if only to make the &$^%ed thing work. Any help will be muchly appreciated. Cory

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• What are common anti-patterns when using VBA

  - by Ahmad

  I have being coding a lot in VBA lately (maintenance and new code), specifically with regards to Excel automation etc. = macros. Typically most of this has revolved around copy/paste, send some emails, import some files etc. but eventually just ends up as a Big ball of mud As a person who values clean code, I find it very difficult to produce 'decent' code when using VBA. I think that in most cases, this is a direct result of the macro-recorder. Very helpful to get you started, but most times, there are one too many lines of code that achieve the end result. Edit: The code from the macro-recorder is used as a base to get started, but is not used in its entirety in the end result I have already created a common addin that has my commonly used subroutines and some utility classes in an early attempt to enforce some DRYness - so this I think is a step in the right direction. But I feel as if it's a constant square peg, round hole situation. The wiki has an extensive list of common anti-patterns and what scared me the most was how many I have implemented in one way or another. The question Now considering, that my mindset is OO design, what some common anti-patterns and the possible solutions when designing a solution (think of this - how would designing a solution using Excel and VBA be different from say a .net/java/php/.../ etc solution) ; and when doing common tasks like copying data, emailing, data importing, file operations... etc An anti-pattern as defined by Wikipedia is: In software engineering, an anti-pattern (or antipattern) is a pattern that may be commonly used but is ineffective and/or counterproductive in practice

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• Are there any decent free JAVA data plotting libraries out there?

  - by Kurt W. Leucht

  On a recent JAVA project, we needed a free JAVA based real-time data plotting utility. After much searching, we found this tool called the Scientific Graphics Toolkit or SGT from NOAA. It seemed pretty robust, but we found out that it wasn't terribly configurable. Or at least not configurable enough to meet our needs. We ended up digging very deeply into the JAVA code and reverse engineering the code and changing it all around to make the plot tool look and act the way we wanted it to look and act. Of course, this killed any chance for future upgrades from NOAA. So what free or cheap JAVA based data plotting tools or libraries do you use? Followup: Thanks for the JFreeChart suggestions. I checked out their website and it looks like a very nice data charting and plotting utility. I should have made it clear in my original question that I was looking specifically to plot real-time data. I corrected my question above to make that point clear. It appears that JFreeChart support for live data is marginal at best, though. Any other suggestions out there?

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• Computer science final year project ideas

  - by roul

  I'm a Computer Science undergraduate student in UK and should be deciding the subject of my final year project soon. The school is pretty flexible with the subject... "The topic can be any area of the subject which is of mutual interest to both the student and supervisor. Topics can range from purely theoretical studies to practical work building a system for some third party, although most projects aim to provide a balance between the theoretical and practical aspects of the subject." ...so I'm a bit lost since I want to do something in software engineering but have no idea what (subject) or with what (languages)! :) a) Languages: I've had experience with Java, C# and ASP.NET mostly but I would definitely be interested in learning new languages/frameworks. I'm kind of drawn by the idea of dynamic languages at the moment so IronPython seems likely. b) Subject: Anything that will keep me interested through the year and will give me the opportunity to learn a lot of stuff. Maybe something that has to do with music, or a fancy website, or a website about music :P anything really. Open to any thoughts/ideas, geeky or cool! Edit: Professors do usually supervise projects in their research areas but I currently have the choice to approach any of them according to my interest - whatever that is.

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• Team Foundation Server - A programmer's guide

  - by Filip Ekberg

  In addition to my Previous topic on How to use SVN, Branch? Tag? Trunk? I would like to get in-depth on how a programmer should/could use TFS. The things that are most interesting to me is not how to set up the server, rather how you use it on a daily basis. In the area of software engineering where your responsibility not only lies on code but achitecture, documentation and other fields, you need to have a collection of your work, prefferably on the same place. So these are my point of interest which I would like to get more knowledge about How would you strucuter a TFS Workspace / Project to support lots of different customers / projects and maybe different projects per customer? Splitting up the folder strucutre on the above project into different pieces such as, Code, Documents - Architecture, Requirements and other, what more could there be and what would be a nice commonly used folder structure? An easy to browse repository; Again the folder structure here is important however this point is more aimed at different Explorers for the repository, not only the built in Team Foundation Explorer. These are just a couple of the points that I would like to know more about, suggestions on Beginners guides, in-depth guides and links covering the above would be very much helpful, please feel free to add other important knowledge-points to this as well.

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• Problem connecting to Apache Derby using Hibernate configuration file in Netbeans (ERROR XSDB6)

  - by me_here

  I've created a local Apache Derby database in Netbeans, but am having problems when I try and autogenerate the POJO files, using the "Hibernate Reverse Engineering Wizard". My Hibernate configuration (generated by Netbeans from the database connection, then I added a few bits): <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Default Netbeans generated parameters --> <property name="hibernate.connection.driver_class">org.apache.derby.jdbc.EmbeddedDriver</property> <property name="hibernate.connection.url">jdbc:derby:C:/CerealDatabase</property> <property name="hibernate.connection.username">cerealuser</property> <property name="hibernate.connection.password">cerealpass</property> <!-- Additional parameters --> <property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.default_schema">CEREALUSER</property> </session-factory> </hibernate-configuration> When I try and generate the POJOs using this configuration file, I get the message to check my configuration file, and the derby.log gives the errors: java.sql.SQLException: Failed to start database 'C:/CerealDatabase', see the next exception for details. Caused by: java.sql.SQLException: Failed to start database 'C:/CerealDatabase', see the next exception for details. Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database C:\CerealDatabase. I've closed any other connections to the database before trying this, and there is no "db.lck" lock file at the time, which indicates there are no connections to the database as I understand it. Does anyone have any ideas? Help gratefully received.

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• Proper use of HTTP status codes in a "validation" server

  - by Romulo A. Ceccon

  Among the data my application sends to a third-party SOA server are complex XMLs. The server owner does provide the XML schemas (.xsd) and, since the server rejects invalid XMLs with a meaningless message, I need to validate them locally before sending. I could use a stand-alone XML schema validator but they are slow, mainly because of the time required to parse the schema files. So I wrote my own schema validator (in Java, if that matters) in the form of an HTTP Server which caches the already parsed schemas. The problem is: many things can go wrong in the course of the validation process. Other than unexpected exceptions and successful validation: the server may not find the schema file specified the file specified may not be a valid schema file the XML is invalid against the schema file Since it's an HTTP Server I'd like to provide the client with meaningful status codes. Should the server answer with a 400 error (Bad request) for all the above cases? Or they have nothing to do with HTTP and it should answer 200 with a message in the body? Any other suggestion? Update: the main application is written in Ruby, which doesn't have a good xml schema validation library, so a separate validation server is not over-engineering.

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• Beginner video capture and processing/Camera selection

  - by mattbauch

  I'll soon be undertaking a research project in real-time event recognition but have no experience with the programming aspect of video capture (I'm an upperclassman undergraduate in computer engineering). I want to start off on the right foot so advice from anyone with experience would be great. The ultimate goal is to track events such as a person standing up/sitting down, entering/leaving a room, possibly even shrugging/slumping in posture, etc. from a security camera-like vantage point. First of all, which cameras/companies would you recommend? I'm looking to spend ~$100, more if necessary but not much. Great resolution isn't a must, but is desirable if affordable. What about IP network cameras vs. a USB type webcam? Webcams are less expensive, but IP cameras seem like they'd be much less work to deal with in software. What features should I look for in the camera? Once I've selected a camera, what does converting its output to a series of RGB bitmaps entail? I've never dealt with video encoding/decoding so a starting point or a tutorial that will guide me up to this point would be great if anyone has suggestions. Finally, what is the best (least complicated/most efficient) way to display video from the camera plus my own superimposed images (boxes around events in progress, for instance) in a GUI application? I can work on any operating system in any language. I have some experience with win32 GUIs and Java GUIs. The focus of the project is on the algorithm and so I'm trying to get the video capture/display portion of the app done cleanly and quickly. Thanks for any responses!!

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• How important is PhD research topic to getting a job?

  - by thornate

  EDIT: This has been closed and I realise that I may not have been specific enough with the original title. I ask two questions here: The general one (Does a PhD help get a job?) which has been asked elsewhere, and the specific one (Is it possible to get work outside of the specific research field?). Assume I've already decided going to do the phd. I'm just stressing about the research topic. Well, I'm one year out of university (Mechatronics engineering and Software Eng double bachelors), worked for a few months then got retrenched (yay economy!). It's looking less and less likely that I'll get a job worth having with the job market as it is, so I'm thinking about going back to uni to do a PhD. I figure that by the time I'm done, the job market will have improved and hopefully I'll have something on my resume that is more attractive than spending three years doing customer support for accounting software. So, my question is to people who've done PhD's. Would you say that they were worth the effort? How important is the research topic to future job-seeking success? The idea I have is a computer-sciencey/neural-networks/data-mining thing which I think is very interesting, but not a field I want to be in forever. My potential supervisor claims that employers don't care so much about the topic of the research but rather the peripheral skills that are developed through a PhD; time managment, self-restraint, planning and whatnot. How does this mesh with people's real world experience? I'd appreciate any advice before signing my life on the line for the next three years. See also: Should developers go to grad school? Best reason not to hire a PhD? How to find an entry-level job after you already have a graduate degree?

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• Printing from web pages (reports especially) with greater precision.

  - by Kabeer

  Hello. I am re-engineering a windows application to be ported to web. One area that has been worrying is 'printing'. The application is data intensive and complex reports need to be generated. The erstwhile windows application takes advantage of printer APIs and extends sophisticated control to the users. It supports functions like page break, avoiding printing on printed parts of the sheet (like letterhead), choice of layouts and orientation, etc. Please note that these setting are not done only while printing, they are part of report definition sometimes. From what I know, we cannot have this kind of control while printing web pages. I am in a process of identifying options at my disposal. While I prefer to first look into something that will help me print from raw web pages, following are other thoughts: Since reports can also be exported to .xls & .pdf versions, let user download one and print directly. This however limits my solution to the area of application that have export feature. Use Silverlight (4.0) for report layout definition and print. I think Silverlight 4.0 (in beta right now) provides adequate control over the printer. I have so far been avoiding the need of any RIA plugin. Meticulously generate reports on web with fixed dimensions. I am not sure how far this will go. Please share practices that can be applied easily in my scenario.

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• search dataset from xml file

  - by Anelim

  Hi, I need to filter the results I obtain when I load my xml file. For example I need to search the xml data for items with keyword "Chemistry" for example. The below xml example is a summary of my xml file. The data is loaded in a gridview. Could you help? Thanks! Xml File (summary): <CONTRACTS> <CONTRACT> <CONTRACTID>779</CONTRACTID> <NAME>ContractName</NAME> <KEYWORDS>Chemistry, Engineering, Chemical</KEYWORDS> <CONTRACTSTARTDATE>1/8/2005</CONTRACTSTARTDATE> <CONTRACTENDDATE>31/7/2008</CONTRACTENDDATE> <COMMODITIES><COMMODITY><COMMODITYCODE>CHEM</COMMODITYCODE> <COMMODITYNAME>Chemicals</COMMODITYNAME></COMMODITY></COMMODITIES> </CONTRACT></CONTRACTS> My code behind code is: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim ds As DataSet = New DataSet() ds.ReadXml(AppDomain.CurrentDomain.BaseDirectory + "/testxml.xml") Dim dtContract As DataTable = ds.Tables(0) Dim dtJoinCommodities As DataTable = ds.Tables(1) Dim dtCommodity As DataTable = ds.Tables(2) dtContract.Columns.Add("COMMODITYCODE") dtContract.Columns.Add("COMMODITYNAME") Dim count As Integer = 0 Dim commodityCode As String = Nothing Dim commodityName As String = Nothing Dim dRowJoinCommodity As DataRow Dim trimChar As Char() = {","c, " "c} Dim textboxstring As String = "KEYWORDS like 'pencil'" For Each dRow As DataRow In dtContract.Select(textboxstring) commodityCode = "" commodityName = "" count = dtContract.Rows.IndexOf(dRow) dRowJoinCommodity = dtJoinCommodities.Rows(count) For Each dRowCommodities As DataRow In dtCommodity.Rows If dRowCommodities("COMMODITIES_Id").ToString() = dRowJoinCommodity("COMMODITIES_ID").ToString() Then commodityCode = commodityCode + dRowCommodities("COMMODITYCODE").ToString() + ", " commodityName = commodityName + dRowCommodities("COMMODITYNAME").ToString() + ", " End If Next commodityCode = commodityCode.TrimEnd(trimChar) commodityName = commodityName.TrimEnd(trimChar) dRow("COMMODITYCODE") = commodityCode dRow("COMMODITYNAME") = commodityName Next GridView1.DataSource = dtContract GridView1.DataBind() End Sub

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• What are the best open-source software non-profits for making financial contributions and/or facilitating useful work?

  - by Jason S

  I'm not a great programmer myself (my main job is more electrical engineering) and have never really helped out with any open source projects, but I've benefited greatly from free and/or open-source software (MySQL, OpenOffice, Firefox, Apache, PHP, Java, etc.) and at some point would like to make some modest financial contributions to help keep this stuff going. I'm wondering, what are the best non-profits to make financial contributions? I'm aware of: Open Source Initiative (founded 10 years ago by several prominent figures including programmer and "The Cathedral and the Bazaar" author Eric S. Raymond) Free Software Foundation Mozilla Foundation Apache Foundation Anyone have a particular favorite? Ideally I'd like to give money to a non-profit that would foster some of the smaller but promising open-source and/or free software projects. The big projects like Firefox and Apache are already well-established. There are a few small individual shareware programs I've already paid for directly. But it's those middle-ground projects that I would really like my contributions to support. (one that comes to mind is a good GUI for Subversion or Mercurial.) It's one thing for a single person to donate a little $$ to a small project. It's another for a foundation or something to give larger grants to projects that give a good bang for the buck. Conservation organizations like The Nature Conservancy, or the Trust for Public Lands, have really honed this approach, but I'm not really sure if there's an equivalent model in software-land.

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