Slides from the talk I did at OpenSolaris Day in Porto Alegre.
Download: hpc_and_OpenSolaris.odp
Silveira Neto Posts
You should know that variable values are cyclic in Java.
public class Test{
public static void main(String args[]){
System.out.println(Integer.MAX_VALUE);
System.out.println(Integer.MIN_VALUE);
int x = Integer.MAX_VALUE + 1;
System.out.println(x);
}
}
This produces:
2147483647
-2147483648
-2147483648
Gregg Sporar, evangelista do Netbeans pela Sun Microsystems, estará essa segunda-feira (14/Abril/2008) em Fortaleza para participar do NetBeans Day Fortaleza.
O evento será essa segunda-feira a partir das 13 horas no auditório da Pró-Reitoria de Graduação, no prédio da Biblioteca Central no Campus do Pici. Dê uma olhada no mapa. Os assentos são limitados, chegue cedo e garanta seu lugar.
No NetBeans Day eu também vou fazer uma apresentação mostrando a palestra que eu vou apresentar no FISL, Netbeans 6: indo além do Java na trilha de Ruby.
Em seguida ele partirá para BrasÃlia e depois para Porto Alegre onde ele apresentará sua palestra no FISL intitulada Memory Leaks in Java Applications – Different Tools for Different Types of Leaks.
Espero vocês lá!
E esse sábado tem o nosso tradicional Café com Tapioca, não esqueçam de ir!
Nós fizemos. Agora temos a placa de formatura mais legal de todos os tempos bem aqui no nosso departamento de Computação. 🙂 A placa de formatura do tux!
Eu ouvi rumores que a próxima turma vai fazer uma placa com algum outro mascote de Software Livre. 😀
We had our third JEG (Java Education Group?) meeting today about Java certifications. We changed our approach and now we are just solving certification questions in group. As we are without projector today we used just my laptop. Today our host was Joselito who solved some section 1 questions.
Joselito’s slides are also available to download here.
More photos in this album.
Was a great meeting, next week another one.
We are meeting every Thursday to talk about Java and certifications (and sometimes about local projects at an operational level). In this moment we are talking about the firsts sections of SCJA and solving mock exams in group.
Our approach is, each week a certification topic, each topic and different person talking. Meetings are free and anyone can join. I’m trying to keep those meeting linked with CEJUG and take we all to the monthly CEJUG meetings.
So next Thursday I’ll not talk. Those slides I used aren’t finished yet so I’ll not share them now, but as soon as possible I’ll do that. More photos here.
Boris Wilson, my girlfriend’s pet, a siamese cat. He loves play in a new box.
Revirando algumas coisas antigas topei com o Manual dos Bixus que nós fizemos em 2005!
Download: Manual_dos_bixus_da_computacao_2005.pdf
Quando os novos alunos da Computação da UFC vão entrar no curso, nós fazemos um livrinho chamado Manual dos Bixus. É uma compilação de piadas sacaneando os calouros mas também algumas dicas realmente úteis como mapas e linhas de ônibus.Este foi a terceira edição do manual, na época eu era do CA (Centro Acadêmico) e foi uma das primeiras coisas que nós fizemos. Eu havia me conhecido o conceito de Wiki a pouco tempo e havia colocado de pé um Wiki para os alunos do curso usando o Dokuwiki, um motor de wikis em PHP que na época era bem limitado, usávamos só um usuário.
Nós começamos a escrever o livrinho usando Wiki. Ia ser a primeira vez que eu via um conteúdo do mundo real, impresso, tocável, construÃdo de maneira dinâmica, colaborativa e distribuÃda. Algo como uma revista colaborativa.
Eu divulguei a idéia na nossa lista de alunos, a idéia foi pra frente, as pessoas foram colaborando e aos poucos foi tomando conteúdo. No final eu peguei o conteúdo, dei uma revisada no texto e fiz as páginas usando o Gimp. Imprimimos uma tiragem de 60 exemplares, com o dinheiro do CA, exatamente os 60 alunos calouros. Infelizmente eu não tive o cuidado de me incluir nesse número. 🙁
Quem sabe não podemos repetir esse ano esse modelo de desenvolvimento.
Sometimes we just need an good template for organizing a OpenSolaris event, I didn’t found a good one in a reusable format so I did this empty OpenSolaris SVG Poster.
Download the svg file: opensolaris_poster.svg
But why an SVG poster? SVG means Scalable Vector Graphics, an XML specification and file format for describing two-dimensional vector graphics. If you use a typical bitmap format like png, gif or jpg and need to scale the image you will loss image quality.
Using a vector graphics format you can scaled the image indefinitely without loss of image quality.
Additionally is a free and open format and also very reusable. You can edit and use it in a broad set of tools, from a scalable image editor like Inkscape to, believe it or not, Netbeans!
Vending Machines, Creative Commons photo by Abuckingham
Those days I was walking in a college to a tech demo and saw a lot of vending machines for soft drinks, coffees and snacks. So I thought “For a college student can be easier get a soda than a free software copy, like opensolaris”. Wouldn’t be nice if we have an OpenSolaris vending machine?
I sketched this idea:
OSVM, Open Solaris Vending MachineBut notice that is not just an CD/DVD vending machine. The OSVM could deliver the newest version of the OpenSolaris distributions to places where internet connections aren’t easy or cheap enough to download entire DVD images. A way to deliver open software to people who would have otherwise not been able to acquire it! Just choose, pay and get your free software.Press button, Receive bacon OpenSolaris.
Inside the machine:
- Switch
- External Internet connection
- Touch screen monitor
- Coolers
- Coolers
- Uninterruptible power supply
- External power source
- DVDs supply
- Money chest
- Paper money recognition device
- DVD Recorder
- OpenSolaris computer
Main challenges:
- It’s necessary an broad internet connection (item 2) so the vending machine can have allways the last builds of each distribution (Indiana, Nevada, Nexenta, Solaris Express, etc). In places where this connection is not available someone should periodically supply the vending machine with more iso images.
- The idea of using an touch screen monitor (item 3) is having a very usable and rich user interface.
- The user should pay for using a paper money recognition device (item 10). I don’t know much about those devices but I guess you just buy an money recognition box that do this for you. After payed the money goes to some kind of chest (item 9).
- The media should come from the supply (item 8 ) to the recorder (item 10) and so be delivered for the user. But how?
- An technology such LightScribe would just fits perfectly in this machine.
- The OpenSolaris computer (item 12) should be capable to store and manage all dvd iso images from each distributions. A reliable filesystem like ZFS would help.
- A software to manage the downloading of each distribution periodically.
- A software to provide a rich user interface, easy and nice to use. JavaFX should fits well.
Haven’t I see this before?
Someho, yes, some similar idea. IBM did a similar project some year ago and there’s too the cool Freedom Toaster that is similar in some points.
What is all about?
Is just a open idea. You can comment, suggest and I’d love to see that implemented.
Update 20.Out.2008: Thanks for those who are helping this idea and giving more ideas. Specially thanks for Everton Rodrigues. Maybe in some time we have an prototype.