gedex’s blog

Gw masih inget jaman awal kuliah dulu, dimana gw sering ke kampus cibinong (rumah om gw). Gile bet dah.. niat ke kampus depok, yang waktu itu jadwal kuliah seminggu penuh + praktikum, eh malah keterusan sampai kampus cibinong. Tas gw juga dulu isinya bukan buku kuliah, tapi HDD. Cuma untuk satu alasan, berinternet ria sebebas-bebasnya dimana makanan dan minuman gratis (klo asep buat ngopi peterpan) . ADSL unlimited buat penghuni rumah pada saat tahun 2002 termasuk mewah apalagi jika sampai bisa gonta-ganti account tak terpakai :D. Beberapa tahun kemudian gw mulai melihat iklan speedy di TV. Kalau gw perhatiin harga layanan dari telkom ini harganya terus menurun, sampai akhirnya abang gw pasang speedy di rumah. Ya, setelah itu gw jadi jarang ke kampus depok & cibinong. Tapi karena kebiasaan buruk gw yang suka download xxx yang sizenya ratusan mega, alhasil selalu melampaui batas quota di dua minggu awal.

Cuih.. terpaksa kembali seperti dulu untuk mengejar bis kota skripsi ku yang membutuhkan banyak referensi, library, contoh aplikasi, database wajah dsb untuk didownload. Jadi untuk fans-fans & penggemar setia ku, untuk beberapa hari ini daku berada di cibinong. Jangan khawatir, kisanak masih bisa konsultasi lewat tilpun or Y!M.

Kalau bisa sih gw pengen ganti ke unlimited kayak kumiz, cuma tetangga gak ada yang punya Sk guru. Tapi kalau 750rb di bagi 5 bisa menekan pengeluaran. Ntar gw survey dulu dah ke tempat kumiz.

Fyuh.. My friends came again to me asking for help, then i guest “it must be their PI related to electronic”. But, nevermind i like to do that :D. As could as possible, the task should be solderless. Damn.. im so f*ck*ng lazy soldering IC’s pin. It could be nice to buy development board for your project dude. So i recommend my friends to buy the devboard. Electronic hobbyist tend to build the board by himself, but i think it is wasting time. There is one way as electronic hobbyist to press budget and time, IMHO, yeah.. find your friend who needs her/his project done ASAP, he/she will give tools, kits & components needed by you and probably a tip. In my case, i don’t need to find them, they come to me already. Last project was digital temperature, using AVR’s ADC, which controls two fans and monitored via LCD. Now, same thing in using LCD, digital clock with alarm and stopwatch. For you, who is familiar with electronic might blame my friend as a foolish. Ya.. ya.. there are many many application note, articles, tutorials strip this project. So who is wrong when someone has money to help hobbyist kill their boring day.

So what you gonna build today, gedex? Just like i said “digital clock with alarm & stopwatch feature”. In addition, other friend also request me to change his already apps, just minor modification. For this digital clock, i use AT89S51/52 as controller, DS1302 for RTC, 93C66 for EEPROM. For you who is interested, here is the code written in assembler (1600 lines). Use new firmware for ‘no reset’ on RTC below.

Happy debugging
To get my digital clock schematic just drop me a message.

Update new firmware here. This time, the program doesn’t reset the clock each time you unplug the power. But for saving alarm time, i still got problem when writing to EEPROM. Anyone can help??

Note : Hari’s program here, based on this app, which i wrote the program in assembler plus added swicth connected to INT0 for switching startup (20,30,40, and 60).

Now i wonder why is so hard to accomplish two totally different area projects. For example, you are noobs in signal processing and you’ve to build apps based on voice recognition. In the same time, you are a top guy in developing web apps where you get money from there. But you are also a nice guy who helps your friends finishing their tasks, say microcontroller projects (this will never hurt you in case you’re happy to do that). But, i felt this situation makes myself being trapped. So i decide not to develop some apps from scratch. OK, sorry too much bullshit here.. lets move ahead.

If you trying to build Computer Vision apps, these libraries will shorten your project time :

• OpenCV (Open Source Computer Vision Library). This libray covers large areas of computer vision. Some demos (apps that come with the library) are included. The only reason why i use this library for my face recognition project is the community where i can get answer from annoying problems. OpenCV Wiki is a good start to get answer, then you can go to OpenCV Forums at Yahoo Groups.
• Torch3vision (The Vision Package of Torch), a machine vision library based on Torch (a machine learning library written in simple C++ and developed at IDIAP). Sebastien Marcel, one of the developers, gives some demos based on real-time face detection & recognition using Torch3vision available on his homepage. It’s awesome dude. He also gives information in comparison between OpenCV face detector and IDIAP face detector.
• MPT (Machine Perception Toolbox) which is developed at machine perception laboratory of UCSD. It supplies cross-platform libraries for real-time perception primitives, including face detection, eye detection, blink detection, color tracking. Soon it will also include expression recognition, predictive color tracking, and tracking based on multisensor fusion. You should see some examples (screenshoots of application) which use this library.
• Collection of computer vision software (with source code) at School of Computer Science / CMU.

So why you should build code which already built by top guys? If you have suggestions to be listed above just tell me, or you maybe interested to join with me in my face recognition project

After a long time using 2.0.5, finally, i decided to upgrade to 2.2 (latest stable released on May 15, 2007). Nothing changes if you look from the cover (themes), but as an admin or registered user you’ll see a new stylish login box at wp-login and some changed options in administration page. Actually, holly things are changed inside (scripts). It was easy to upgrade to 2.2, just follow instructions available on wp documentation’s page, section Upgrading Wordpress. I felt glad that all plugins i’ve used before still work in 2.2. There are some reasons why i do upgrading to 2.2, but mostly comes from bug issue. Whilst googling to search vulners in old wp, i found some interesting sites which share exploit to compromise with wp (For your convenience please see wp trac). Here they are :

• Wordpress 2.2 (xmlrpc.php) Remote SQL Injection Exploit by Alexander Concha. Actually I’ve not tested this exploit yet. OK here what is as explained from by alex (translated from spanish) :
  The error comes from wp_suggestCategories() function in xmlrpc.php file. As it is possible to be observed in that function, a conversion to whole number doesn’t become the value of $max_results, reason why user_login is possible to send values of the type 0 UNION ALL SELECT, user_pass FROM wp_users. Alex gives the exploit which gives back the list of users with his respective passwords in MD5, in addition it also includes the cookies of authentication for each user. In order to correct this problem is to change line $max_results = $args [] of the function wp_suggestCategories() by $max_results = (int) $args [4]. See Changeset 5570. This exploit just viable for blog with user registration enabled
  CMIIW
• Wordpress Template.PHP HTML Injection Vulnerability by David Kierznowski
  A kind of CSRF vulnerability. See Changeset 4665
• WordPress Persistent XSS by David Kierznowski which affects the latest version v2.0.5. See Changeset 4665
• Wordpress 2.1.3 admin-ajax.php SQL Injection Blind Fishing Exploit by Janek Vind a.k.a waraxe. This is a critical security for 2.1.3
  

And much more for old version. See also :

• Wordpress Trac
• All vulnerabilities archieve at SecurityFocus, sort vendor to Wordpress
• WP Exploits and Vulners at milw0rm
• David Kierznowski’s blog
• Buayacorp’s blog (Spanish)

Maaf desain saya masih cupu, hanya untuk ngomporin rekan-rekan yang lain untuk ikut berkontribusi. Saya lampirkan source psd (Photoshop CS) nya, mungkin bisa diutak-atik bagi yang berminat :p. Untuk font-font yang digunakan bisa di download disini. [Klik untuk memperbesar]

• Contoh 1. Gambar ditengah merepresentasikan membership function yang dibangun pada kurva distribusi Gaussian. Disebelah kanan dan kiri terdapat jaringan neural sederhana.
  File psdnya
• Contoh 2. Yang saya buat mencolok hanya bentuk triangular membership function
  File psdnya

Maaf hanya bisa dua dulu, jika ada masukan silahkan tinggalkan pesan :D.