http://www.dcon.com.br/jd.comment/ http://www.dcon.com.br/jd.comment/img/logo000.png http://www.dcon.com.br/jd.comment/ pt-br Jose Damico Creative Commons #comments Hi guys, I would like to share with you my first results writing my own Operating System in ASM. <img src='img/damix.png' alt='my own os' border='0'> DamIX, is a 16bit OS, runs in a floppy disk, in a 64KB segment and a FAT12 fs. Damico 2012-01-10 #comments Hi all, Studying the basics of cryptography using XOR I've decided to to design some XOR graphical representation, as several that we can find in the Web (<a href='http://en.wikipedia.org/wiki/Xor'>http://en.wikipedia.org/wiki/Xor</a>). The result can be seen bellow. It is very interesting to see the symmetry of result. <a href = 'http://github.com/damico/XorGraphicSymmetry/raw/gh-pages/img/xor-symmetry.png' ><img src = 'http://github.com/damico/XorGraphicSymmetry/raw/gh-pages/img/xor-symmetry.png' alt='graphic xor' width='500' border = '0' > </a> Also the source code is available at: <a href = 'http://damico.github.com/XorGraphicSymmetry/' >http://damico.github.com/XorGraphicSymmetry/</a> See you. Damico 2012-01-10 #comments Através da criação do "Identity Protection Technology", IPT, a Intel passa a oferecer em seus processadores i3, i5 e i7 (2a. geração) e posteriormente nos Ultrabooks uma série de recursos de segurança. Tais recursos estão embarcados em uma área do processador chamada de Management Engine (ME). Essa área pode ser acessível através do bus PCI por meio de um Firmware embarcado na BIOS e um driver. Dessa forma diversos algoritimos de gerenciamento de senhas, proteção de identidade e autenticação de transações, que normalmente são feitos via software dependentes do sistema operacional, podem agora ser transferidos para para execução interna no ME dentro do processador e assim garantir a inviolabilidade desses algoritmos. Além disso somente algoritmos assinados por certificados reconhecidos pela Intel poderão rodar nessa área do processador. Para que os usuários comuns possam se beneficiar dessa tecnologia em acesso a bancos, lojas eletrônicas, redes sociais, etc, essas empressas precisarão que seus sistemas de segurança e autenticação sejam atualizados para funcionar nesse novo padrão. Para isso a Intel estabeleceu parceria com a InfoSERVER S/A para o desenvolvimento de soluções que permitam a integração do mercado. Para maiores informações: *http://www.infoserver.com.br/olhar_digital/olhar_digital.asp* *http://www.infoserver.com.br/idf.asp* *http://www.infoserver.com.br/ipt/default2.asp* Damico 2012-01-10 #comments Create a filter like this: ip.addr==10.1.1.2 && ip.addr==10.1.1.3 and http and xml It will trace all http/xml conversation between 10.1.1.2 and 10.1.1.3 both as src and destination. See you! Damico 2012-01-10 http://dcon.com.br/jd.comment/java-nio-docs.7z http://dcon.com.br/jd.comment/java-nio-docs.7z http://dcon.com.br/jd.comment/java-nio-docs.7z#comments A friend of mine asked me for Java NIO PDF Documents, Presentations and Books references. Here is what I have: - Advanced JavaTM NIO Technology-Based Applications Using the Grizzly Framework - A Programmer’s Tutorial on Event-Driven Programming, Asynchronous Input/Output, and the Bamboo DHT - A Study of Java Networking Performance on a Linux Cluster - Getting started with NIO - How to Build a Scalable Multiplexed Server With NIO Mark II - Improving Java Network Programming - Introduction to NIO: New I/O - Java NIO - JAVA NIO FRAMEWORK Introducing a high-performance I/O framework for Java - Multiple Client Server and Java New-IO (nio) classes - New I/O in JDK 7 - Scalable IO in Java - Using the new Java I/O interface in parallel computing All files are inside this compressed file: *http://dcon.com.br/jd.comment/java-nio-docs.7z* See you... Damico 2012-01-10 http://dcon.com.br/jd.comment/chronosImpressControl.txt http://dcon.com.br/jd.comment/chronosImpressControl.txt http://dcon.com.br/jd.comment/chronosImpressControl.txt#comments Hi all, This is a small implementation of OpenOffice/LibreOffice Impress remote control by Texas Instruments ez430 Chronos Clock in Linux environment. It was written in Python and also uses xdotool. All steps were commented. *http://dcon.com.br/jd.comment/chronosImpressControl.txt* Feel free to use, distribute and modify. Best Regards, Damico Damico 2012-01-10 #comments The situation: <br><br> db2 => connect to dbname<br> <font color="RED"><b>SQL1084C Shared memory segments cannot be allocated. SQLSTATE=5</b></font> <br><br> <b>In Linux, increase the number of following kernel parameters:</b> <br><br> <b>kernel.shmmax=15099494000 </b>#Almost the total of RAM Memory, in this case 16GB <br> <b>kernel.shmall=8099494000 </b>#Half of total of RAM Memory<br> <br> These parameter must be set at: <font color="GREEN"><b>/etc/sysctl.conf</b></font> file. <br><br> To test if the parameters were accepted issue the command: <br><br> <b>#sysctl -p</b> <br><br> The response should be something like this: <br><br><b> kernel.sem = 1024<br> kernel.msgmni = 1024<br> kernel.shmmax = 15099494000<br> kernel.shmall = 8099494000 </b><br><br> See you!<br><br> Damico 2012-01-10 #comments Some urls to clarify your decision: *http://maratux.blogspot.com/2009/03/microsoft-uses-git-for-version-control.html* *http://amplicate.com/hate/git* *http://markmcb.com/2008/10/18/3-reasons-to-switch-to-git-from-subversion/* *http://thinkvitamin.com/code/why-you-should-switch-from-subversion-to-git/* *http://markwaite.blogspot.com/2009/11/was-our-switch-to-git-mistake.html* *http://joemaller.com/907/switching-to-git/* *http://ellislab.com/blog/comments/ellislab_switches_to_git_moves_to_github* *http://blog.extracheese.org/2010/05/why-i-switched-to-git-from-mercurial.html* *http://blogs.enterprisedb.com/2010/10/28/why-postgres-switched-to-git/* Damico 2012-01-10 #comments Conforme solicitado pelos alunos, segue o link com o exemplo do Exemplo de Lambda Expression Tree em C# (C sharp) *http://dcon.com.br/jd.comment/csharp/ExpressionTreeLambda.zip* Damico 2012-01-10 #comments Java Implementation: *http://dcon.com.br/jd.comment/c-sharp-railfence.cs* C# Implementation: *http://dcon.com.br/jd.comment/java-railfence.java* Damico 2012-01-10