Fazlamesai Galaksi

Emre Sevinç: Shops selling game of GO equipment in Belgium and Netherlands

2010-09-01T17:30:10+00:00

I did a little research in order to find out GO shops in Belgium and Netherlands. Apparently there 2 shops in Brussels and an impressive one in Amsterdam, very close to the central train station. Below you can find the relevant information: - http://www.schaakengo.nl/ - http://www.amsterdam.info/shopping/chess/ - http://www.marchand.be/ - http://www.schaakengo.nl/www_schaakengo2/goshops.html

Emre Sevinç: Some more NLP articles related to Turkish

2010-09-01T08:13:41+00:00

Thanks to Ahmet A. Akın, here is a list of three articles: - Text Summarization of Turkish Texts using Latent Semantic Analysis (Makbule Gülçin Ozsoy, Ilyas Ciçekli, Ferda Nur Alpaslan) - Named Entity Recognition Experiments on Turkish Texts (Dilek Küçük ve Adnan Yazıcı) - Pronoun Resolution in Turkish Using Decision Tree and Rule-Based Learning Algorithms [...]

Emre Sevinç: Adventures in the world of multi boot USB sticks

2010-08-31T19:43:09+00:00

I’m in the process of creating the ultimate USB multi boot stick for personal and professional uses, so far I experimented a little bit with Parted Magic, Clonezilla and grml. I want to note down the useful sites so far: - Create your own save-your-ass multi-boot USB stick - Boot Multiple ISO from USB (MultiBoot [...]

Emre Sevinç: Turkish Deasciifier: Firefox add-on version statistics

2010-08-28T10:12:06+00:00

I’m happy to see that Turkish Deasciifier Firefox add-on is being downloaded every day and used regularly by people who like / need it. I plan to add some features but currently I’m waiting for Jetpack SDK developers to solve some technical problems. PS: Those fancy graphics are part of the Mozilla add-on management pages [...]

Emre Sevinç: Some recent NLP articles for Turkish processing

2010-08-28T09:55:33+00:00

Here’s a short list compiled by Ahmet A. Akın: - Unsupervised Search for The Optimal Segmentation for Statistical Machine Translation (Coşkun Mermer – Ahmet Akın) - Syntax-to-Morphology Mapping in Factored Phrase-Based Statistical Machine Translation from English to Turkish (Reyyan Yeniterzi, Kemal Oflazer) - Annotating Subordinators in the Turkish Discourse Bank (Deniz Zeyrek, Ümit Turan, Cem [...]

Emre Sevinç: TRmorph: a relatively complete morphological analyzer for Turkish (under GPL)

2010-08-25T08:50:22+00:00

“TRmorph is a relatively complete morphological analyzer for Turkish. It is implemented using SFST, and uses a lexicon based on (but heavily modified) the word list from Zemberek spell checker. The morphological analyzer is distributed under the GPL. To use the analyzer you need SFST. As well as the full source code, a compiled fsa, [...]

Emre Sevinç: Hamsi can become more than a type of fish due to a Turkish mathematician

2010-08-21T15:56:17+00:00

One of the most famous type of fish in Turkey, namely Hamsi can now become very famous in the world of cryptography and security. A Turkish mathematician who is pursuing a Ph.D. at K.U. Leuven proposed a cryptographic hashing algorithm to NIST. Özgül Küçük‘s Hamsi cryptographic hashing algorithm is one of the 15 algorithms that [...]

Emre Sevinç: fail2ban: Defending Apache against brute force attacks to digest authentication protected pages

2010-08-21T14:34:19+00:00

I’ve just realized that the default filters installed with fail2ban in Ubuntu GNU/Linux does not help you when you use Digest Authentication with Apache. In order to have the most basic measure against brute force attacks to a digest authentication enabled web service you need to modify /etc/fail2ban/filter.d/apache-auth.conf. I have tried the suggestion given at [...]

Emre Sevinç: Getting ready for the CALL conference at UA – ANTWERP CALL 2010: Motivation and beyond

2010-08-17T12:54:33+00:00

I’ll try to attend to international CALL (Computer Assisted Language Learning) at University of Antwerp for the next three days: Keynote speakers Antonie Alm (University of Otago, New Zealand), Maarten Vansteenkiste (Ghent University, Belgium) and Ema Ushioda (Warwick University, United Kingdom) will provide an overview of literature on motivation, an introduction to Self-Determination Theory and [...]

Serbülent Ünsal

Nightwalker — 2010-08-16T16:53:34+00:00

Take the Supernatural Character Quiz

Emre Sevinç: Live Carillon Performance from Ghent

2010-08-15T15:04:03+00:00

Some more live carillon performances, this time from Ghent. Close your eyes in order to stay away from the distraction of videos and enjoy the exciting rich timbre of the bells:

Emre Sevinç: Ancient Symbols, Computational Linguistics, and the Reviewing Practices of the General Science Journals

2010-08-15T10:57:41+00:00

The strongest criticism comes after and against one of the most controversial and recently popular research which made use of computers to understand ancient symbols. The issue was made famous by WIRED’s “Artificial Intelligence Cracks Ancient Mystery” article. Richard Sproat’s strong criticism of mis-using statistical methods in order to detect if a sequence of symbols [...]

Emre Sevinç: Back from London

2010-08-14T17:01:45+00:00

Emre Sevinç: turkish-deasciifier: Firefox add-on went public

2010-08-14T16:53:55+00:00

I received the following e-mail from the Mozilla Add-on team: “Congratulations! Your nominated add-on, Turkish Deasciifier, has been reviewed by a Mozilla Add-ons editor who approved your add-on to be public. Your most recent version (0.2) has also been made public. You can view your public add-on now at: http://addons.mozilla.org/addon/204311 Review Information: Reviewer: Jorge Villalobos [...]

Emre Sevinç: Asus Eee PC + Ubuntu Netbook Edition

2010-08-09T20:45:34+00:00

I finally have my Asus Eee PC 1008P up and running with Ubuntu Netbook Edition without any major issues (but I had to install older Ubuntu Netbook Remix first, then do a dist-upgrade). Here are some useful links: - https://help.ubuntu.com/community/EeePC/Using - https://help.ubuntu.com/community/EeePC/Fixes - https://wiki.ubuntu.com/HardwareSupport/Machines/Netbooks#Asus%20Eee%20PC%201008HA - http://wiki.debian.org/DebianEeePC/Model/1005pe - http://wiki.debian.org/DebianEeePC/TipsAndTricks

Emre Sevinç: turkish-deasciifier: Firefox add-on version 0.2 is available

2010-08-07T20:16:27+00:00

Turkish Deasciifier Firefox add-on v. 0.2 is out, this is a bug fix release for problems like “yok -> yök”, “oldu -> öldü” You can update your add-on by visiting https://addons.mozilla.org/en-US/firefox/addon/204311/ and clicking on ‘Add to Firefox’ button. You need to update your add-on manually because it is not yet reviewed by Mozilla add-on team, [...]

Emre Sevinç: turkish-deasciifier: Java version is available

2010-08-06T14:35:21+00:00

Ahmet Alp Balkan created the Java version of my Python implementation of turkish-deasciifier (originally by Deniz Yüret in Emacs Lisp). The source code as well as the .jar file is available at http://code.google.com/p/turkish-deasciifier/. You can read his blog entry here. For web based version visit http://turkceyap.appspot.com/ To install Firefox add-on visit https://addons.mozilla.org/en-US/firefox/addon/204311/ Ton install Chrome [...]

Emre Sağlam: Voting abroad and document distribution chaos.

2010-08-04T16:54:58+00:00

In Turkey we are approaching a referendum for a major constitutional change. I’m not going to write about what the change is and how it impacts citizens’ lives, that’s my father’s job Instead I’m going to write about how voting abroad for Turkish ex-pats is handled.

I’m only living abroad for ten years and I know before I left Turkey, there was a concept of voting on the border (which includes consulates and physical borders.) About ten years ago us, the Turkish ex-pats, were not allowed to vote anymore for any elections or referendums in Turkey. It looks like this is changing now for better I hope.

For the last few months emails are being forwarded between ex-pats, some major Turkish political, cultural organizations, web sites are spreading the word about this new right to be able to vote abroad. But the way this “spreading the word” is done in such a weird way that I am feeling very uncomfortable to follow what is really going on.

So far I got 4 different emails pointing to 4 different web sites and none of them are official government web sites. When I go and read the content of the news about this, none of the articles are pointing to an official governmental word about voting abroad. Instead they unanimously talk about filling a form, and mailing it to your local consulate or the General Directorate of Civil Registration and Nationality of Turkey.

The distribution of that form is the main issue here. You are filling a National Form that requests every bits of your identity. Especially this form has to be distributed by only Turkish Government. How can I trust a form that I download from any site?

All the sites I mentioned above, host the form and link to their version of the form. One site hosts it in MS Word format as a .doc file, the other hosts it in Adobe Acrobat format as a .pdf file. One site has a version with pretty graphics, the other one with straight text format… Come on!

(When I was trying to find different versions of the form on different web sites I realized one of those web sites was already hacked by a Turkish hacker group. Now can you trust this?)

I worked pretty much 4 years of my life trying to fix that type of issues with the Turkish government between 2000-2004, it looks like nobody learned anything on electronic government practices.

It’s time for Turkish government to create a central, secure repository for documents, and standardize all government related paperwork. Anything close to this is e-Konsolosluk web site (which was down when I was writing this entry) and that is only for consular services. How to do this is another topic which I will be writing in the near future.

Emre Sevinç: Lisp: A Space Odyssey

2010-08-04T14:58:21+00:00

A funny magazine cover from good ol’ days: For more info: - http://kazimirmajorinc.blogspot.com/2010/07/cover-of-byte-1979-lisp-issue.html - http://xahlee.org/funny/byte_mag_lisp.html - http://groups.google.com/group/comp.lang.lisp/browse_frm/thread/516417684a3e8f69#

Emre Başar: Catch-22

2010-08-04T10:54:18+00:00

- 'I'm not joking,' Clevinger persisted.
- 'They're trying to kill me,' Yossarian told him calmly.
- 'No one's trying to kill you,' Clevinger cried.
- 'Then why are they shooting at me?' Yossarian asked.
- 'They're shooting at *everyone*,' Clevinger answered.
  'They're trying to kill everyone.'
- 'And what difference does that make?'

Joseph Heller - Catch-22

Emre Sevinç: Comic Sans from the British Consulate General

2010-08-03T18:37:14+00:00

I recently applied for a family permit from British consulate in Brussels so that I could go to London and spend a few nice days. Their information e-mail (that said I can come and get my passport back) was lovely in terms of fonts. It seems like they didn’t hear about the latest news regarding [...]

Emre Sevinç: Asus Eee PC + Ubuntu Netbook Remix: Solving the flaky wireless problem

2010-08-03T17:44:59+00:00

I’ve managed to install Ubuntu 9.04 Netbook Remix to my Asus Eee PC 1008P but the wireless turned out to be rather flaky, connecting and disconnecting all the time. Fortunately this forum post was helpful: http://ubuntuforums.org/showthread.php?t=1388511 and the following command solved my wireless problem: sudo apt-get install linux-backports-modules-wireless-karmic-generic

Emre Sevinç: Is it easy to become bilingual? The case of Turkish and Moroccan children in Netherlands

2010-08-03T14:58:37+00:00

I’ve recently learned about the research of Anna Scheele from Utrecht University on the topic of bilingualism in children, particularly the children in Netherlands. Her thesis is titled “Home language and mono-and bilingual children?s emergent academic language: A longitudinal study of Dutch, Moroccan-Dutch, and Turkish-Dutch 3-to 6-year-olds“. Below is some excerpts from an English press [...]

Emre Sevinç: Asus Eee PC + Ubuntu Netbook Edition: Missing Operating System

2010-08-01T21:13:29+00:00

WARNING: Some commands mentioned below can damage your system if used in a careless manner. Recently I was trying to boot my Asus Eee PC 1008P (Karim Rashid Collection) with Ubuntu Netbook Edition but no matter how I tried to set up the BIOS settings, the system did not boot from my USB stick, always [...]

Emre Sevinç: Turkish Deasciifier: Google App Engine version ready

2010-07-31T09:52:54+00:00

The Google App Engine version of Turkish Deasciifier is ready. You can try it at http://turkceyap.appspot.com/ This is version 0.1 and is the actual Python implementation. I have created this so that people who doesn’t want to install a Firefox add-on or Google Chrome extension can give it a try, too. For related news and [...]

Emre Sevinç: turkish-deasciifier: Google Chrome browser extension

2010-07-26T07:38:27+00:00

Mustafa Emre Acer has recently published the Google Chrome extension of the Turkish Deasciifier. The Firefox add-on version is also available here. For Turkish Deasciifier related posts please keep an eye on http://ileriseviye.org/blog/?tag=turkish-deasciifier

Emre Sevinç: turkish-deasciifier: Firefox add-on

2010-07-24T16:40:48+00:00

I have just finished developing the initial version of the Turkish Deasciifier add-on for Firefox. You can see the add-on at https://addons.mozilla.org/en-US/firefox/addon/204311/. I’ve prepared it using Jetpack SDK and the source code is available at http://github.com/emres/jetpack-turkish-deasciifier. The add-on is still not reviewed by Mozilla team, I plan to apply for review after some users try [...]

Emre Sevinç: turkish-deasciifier: Added to Softpedia

2010-07-24T10:49:03+00:00

I’ve just received an e-mail from Softpedia Editorial Team about my Python implementation of Deniz Yüret’s Turkish deasciifier: Congratulations, Turkish Deasciifier, one of your products, has been added to Softpedia’s database of software programs for Linux. It is featured with a description text, screenshots, download links and technical details on this page: http://linux.softpedia.com/get/Text-Editing-Processing/Others/Turkish-Deasciifier-58739.shtml The description [...]

Emre Sevinç: turkish deasciifier: Added to Python Package Index

2010-07-24T10:45:51+00:00

I’ve recently added my Python implementation of Turkish deasciifier to the Python Package Index (PyPI). You can see the details at: http://pypi.python.org/pypi/Turkish Deasciifier/ Now I’m in the process of creating a Firefox plug-in using Jetpack SDK. This will make it much easier for end users. For turkish-deasciifier related posts please visit http://ileriseviye.org/blog/?tag=turkish-deasciifier PS: One of [...]

Emre Sevinç: Turkish deasciifier in Python and state of the art in deasciification

2010-07-19T20:05:10+00:00

I have recently finished converting Deniz Yüret’s Turkish deasciifier, turkish-mode (that was implemented in Emacs Lisp) into Python. The source code is available at http://github.com/emres/turkish-deasciifier. For those who are a little bit puzzled at the term ‘deasciification’: It is the process of converting a Turkish text that is written using only ASCII letters into a [...]

Emre Sevinç: Are we engineers, like John Roebling?

2010-07-12T19:50:52+00:00

“Most of you”, says Vyssotksy, “probably recall pictures of ‘Galloping Gertie‘, the Tacoma Narrows Bridge which tore itself apart in a windstorm in 1940. Well, suspension bridges had been ripping themselves apart that way for eighty years or so before Galloping Gertie. It’s an aerodynamic lift phenomenon, and to do a proper engineering calculation of [...]

Serbülent Ünsal: Özgür Kuşlar Üzerine...

Nightwalker — 2010-07-12T09:29:33+00:00

Aslında Gürer'in blog girdisine yorum olarak yazmaya başlamıştım ama laf çok uzayınca bir ayrı bir girdi olarak yazmaya karar verdim.

Sesli düşünmeye çalışacağım. Öncelikle Pardus, Debian ve benzeri dağıtımlardan farklı olarak belirli bir sponsor tarafından finanse edilen, belirli bir büyüklüğe ulaşmış (kanımca kritik eşiği aşmış) ve finanse edilmeye devam edecek bir proje. Bu bağlamda gönüllü geliştiricilerin ayrılması iş gücü olarak ciddi bir kayıp yaratmaz bence.

Hatta bugün bütün gönüllü geliştiriciler ayrılsa dahi projede çok önemsenecek bir değişim yaşanmaz. Projenin kullanıcıları zaten bu tip tartışmaların dışındalar çoğunlukla. Özellikle kurumsal kullanıcılar genel olarak tamamen habersizler camia ve topluluk süreçlerinden.

Eğer ayrılanlar gönüllü geliştiricilerin içerisinde kaliteli bir topluluksa bir süre boyunca gönüllü geliştiricilerin genel kalitesi düşer ancak kritik eşik aşıldığı için durum bir süre sonra normale döner.

Kaybedilecek olan büyüme ölçeklenebilirlik vs. değildir bana göre. İşe bu kavramlardan girilirse, proje yönetimi bunun aksini rakamlarla kısa süre içinde ispat edecektir muhtemelen.

Ama kaybedilen daha değerli bir şeymiş gibi geliyor bana. Maddi olmayan, öyle grafikle tabloyla falan gösterilemeyecek birşeyler. Projeye katkı verirken yaptığı işten zevk alan, bunu yaparken temel motivasyonu özgürlük olan geliştiricilerin kaybedilmesi demek, projenin her durumda ona doğruları çekinmeden söyleyen ve onun özgürlüğünü karşılığında hiçbirşey beklemeden savunan dostlarını kaybetmesi demektir bence.

Hele ayrılanların ardından "Biz süreçlerimizi başkalarına göre mi belirleyeceğiz" ve "Giden gider kalan sağlar bizimdir" türünden yaklaşımlar kalan geliştiricilerle bağları zayıflatmaktan başka bir sonuç doğurmaz. Bu durum değişmediği takdirde bunun sonuçları bugünden yarına da çıkmayacaktır ortaya .

Yalnız kamu ( Başbakanlık, UEKAE, DPT ne dediğiniz fark etmez ) tarafından fonlanan bir proje olduğunu da unutmamak gerekir Pardus'un. Malum devlet de genel olarak sahip olduğu otoriteyi bulabildiği her boşlukta arttırmaya çalışan bir yapıya sahip ülkemizde.

Bu gün özgürlüğü savunan gönüllüler bu projeden kopmaya devam ederse ve projenin büyüklüğüne güvenilip bu durumu değiştirmek için gerekenler yapılmazsa, yarın bu günkü yönetim kadar özgürlük kaygısı olmayan başka birileri bu projenin büyüklüğüne güvenerek ayrılacak 3-5 kişiyi önemsemeyip onu kendi tekellerine aldığında, Pardus'un yalnızca adı ve kodları kalır geriye ve sizin özgürlüğünüzü savunacak kimse kalmamış olabilir ortalıkta. Üstelik bu vaka ilk de olmaz, son da olmaz yalnız ve güzel ülkemde.

Emre Sevinç: Heuristics for Life

2010-07-05T09:00:39+00:00

Below is the answer given to the question “What are some of your life heuristics?”. They belong to ACM Fellow and A.M. Turing Award recipient Edward A. Feigenbaum, a pioneer in the field of expert systems. This excerpt is from this interview. * Pay a lot of attention to empirical data, because in empirical data [...]

Emre Sevinç: Bloggen in het Nederlands

2010-07-04T16:57:46+00:00

(Automatic English translation. Otomatik Türkçe çeviri.) Mijn uitdaging vandaag is bloggen in het Nederlands om een verjaardag te vieren. Vandaag precies één jaar geleden, ben ik naar België gekomen om met mijn vrouw samen te wonen. In het begin maakte ik me zorgen over wonen in Antwerpen omdat ik wist dat de stad kleiner dan [...]

Emre Sevinç: A question for Bentley: Can robots read a book?

2010-07-02T08:04:23+00:00

I have just finished reading Jon Bentley’s famous programming book: Programming Pearls (2nd Edition). I plan to summarize my impressions soon but before that I’d like to draw attention to an interesting sentence from the book (Strings of Pearls, (Column 15 of Programming Pearls)): Extremely long strings represented by the letters A, C, G and [...]

Emre Sağlam: Lotus Notes 8.5 on Ubuntu 10.04

2010-06-30T15:22:16+00:00

If you need to run native Linux client for Lotus Notes 8.5 on Ubuntu 10.04:

1) After installing your ibm_lotus_notes*.deb files, drop the following files under /opt/ibm/lotus/notes

libgdk-x11-2.0.so.0
libgtk-x11-2.0.so.0
libgdk_pixbuf_xlib-2.0.so.0
libgdk_pixbuf-2.0.so.0

You can get the files here.

2) Install msttcorefonts package: sudo apt-get install msttcorefonts

3) Go to File -> Preferences and choose Windows and Themes on the left pane. For Theme, choose Operating System Theme. This way most of the fonts in the UI look much better.

Emre Sevinç: NLP Links of The Day

2010-06-24T11:13:05+00:00

Using The Wisdom Of Crowds To Translate Language: “There are aspects to the translation problem that are undeniably, unavoidably human,” says Philip Resnik, who teaches linguistics at the University of Maryland. Resnik says computer translators like Babelfish and Google Translate work best when they have lots of translation data to learn from. And we only [...]

Emre Sevinç: Devuvuzelator: Download and install to filter the annoying vuvuzela noise in World Cup

2010-06-24T08:03:34+00:00

Sick of the vuvuzela? Me too. If you’re watching the game on your computer like I am, just download and run this program to filter your live World Cup broadcast in real-time (ESPN3, BBC, etc), choosing which level of de-vuvuzela’ing filtering you find most suitable. No installation required, just download and run! Developed by Jeff [...]

Emre Sevinç: Micro Men: The Story of a Golden Age

2010-06-20T14:18:41+00:00

Micro Men: In 1979 Clive Sinclair, British inventor of the pocket calculator, frustrated by the lack of home investment in his project,the electric car, also opposes former assistant Chris Curry’s belief that he can successfully market a micro-chip for a home computer. A parting of the ways sees Curry, in partnership with the Austrian Hermann [...]

Emre Sevinç: Word Frequencies and Language Resources (different sets of corpus)

2010-06-18T09:26:23+00:00

Recently I’m searching for non-lemmatized word frequency tables compiled for various languages such as German, French, Spanish, Dutch, etc. So far it seems a better idea to construct such tables from different sets of corpus. Here are some relevant links. 2 outstanding examples: - Wortschatz: 57 Corpus-Based Monolingual Dictionaries: http://corpora.uni-leipzig.de/ and http://corpora.uni-leipzig.de/download.html - negr@corpus: A [...]

Emre Sevinç: SentiWordNet: Sentiment Analysis and Opinion Mining with WordNet

2010-06-16T13:51:27+00:00

SentiWordNet is a lexical resource for opinion mining which is publicly available. SentiWordNet assigns to each synset of WordNet three sentiment scores: positivity, negativity, objectivity. SentiWordNet is described in details in the papers: SentiWordNet: A Publicly Available Lexical Resource for Opinion Mining SentiWordNet 3.0: An Enhanced Lexical Resource for Sentiment Analysis and Opinion Mining A [...]

Emre Sevinç: Readability Analyzer for Dutch: t-scan

2010-06-15T11:38:20+00:00

Another interesting project related to Readability tests and metrics from Utrecht University: t-scan: A software for complexity analysis of Dutch texts. The automatic English translation is available. There is a log in screen at http://languagelink.let.uu.nl/tscan/login/?next=/tscan/app/ but no register link, so I guess one has to contact the researchers / developers in order to examine the [...]

Emre Sevinç: Memory Improved By Saying Words Aloud

2010-06-10T15:03:30+00:00

New study finds memory improved by vocalising or sub-vocalising words: http://www.spring.org.uk/2010/06/memory-improved-by-saying-words-aloud.php Committing words to memory is a notoriously hit-and-miss business. Over the last forty years psychologists have found three methods which consistently improve memory for words: 1. Imagery: recall is aided by creating an image of what you want to remember. 2. Elaboration: thinking of [...]

Emre Sevinç: Intel, IMEC and Five Flemish Universities Open Flanders ExaScience Lab

2010-06-10T10:06:37+00:00

Intel, IMEC, the Flemish Agency for Innovation by Science and Technology (IWT) and five Flemish universities announced the opening of the ExaScience Lab in Leuven, Belgium. IMEC is Europe?s largest independent research center in nanoelectronics and nano-technology. Its staff of more than 1,750 people includes over 550 industrial residents and guest researchers. Imec?s research is [...]

Emre Sevinç: TÜBİTAK matematikçi Prof. Dr. Ali Nesin’i sözlüye kaldırmış!

2010-06-09T09:09:46+00:00

Kaynak: http://www.birgun.net/edus_index.php?news_code=1275812260&year=2010&month=06&day=06 Türkiye’nin en önemli matematikçilerinden, gençler için Matematik Köyü’nün kurucusu, Prof. Dr. Ali Nesin, Matematik Köyü kapsamında liseliler için hazırlanan bir projeyi TÜBİTAK’a sunar. TÜBİTAK’ın projeye, Matematik Köyü’ne ve bizzat Ali Nesin’e yaklaşımı ise Aziz Nesin’in hikayelerini aratmaz. Ali Nesin’in başına gelenleri, TÜBİTAK Başkanı Nüket Yetiş’e yazdığı 5 Haziran tarihli mektubundan aktarıyoruz: İstanbul, 5 [...]

Emre Sağlam: The Beast

2010-06-04T20:01:25+00:00

The Beast, originally uploaded by Emre Saglam.

Heavy HDR. Picture of the evil clown thingy in Seattle.

Emre Sevinç: Access To Certain Google Services Blocked From Turkey

2010-06-04T11:32:25+00:00

Statement by Dr. Yaman Akdeniz, Associate Professor, Human Rights Law Research Center, Faculty of Law, Istanbul Bilgi University, and Director of Cyber-Rights.Org. (lawya@cyber-rights.org): The situation in terms of Internet censorship has moved from BAD to WORSE in Turkey as the Telecommunications Communication Presidency (TIB) asked the Turkish Internet Service Providers to block access to certain [...]

Emre Sevinç: Natural Language Processing for Dutch

2010-06-03T13:41:02+00:00

Some links in the intersection of Dutch and NLP: - Dutch corpora in NLTK: http://code.google.com/p/nltk/wiki/Corpora - The Alpino Treebank: This treebank contains syntactically annotated Dutch sentences. The treebank (more than 150,000 words) includes the full cdbl (newspaper) part of the Eindhoven corpus. http://www.let.rug.nl/vannoord/trees/ - LASSY (Large Scale Syntactic Annotation of written Dutch) is a STEVIN [...]

Emre Sevinç: Endangered Languages in Turkey and Belgium

2010-06-01T12:53:40+00:00

“Half of the 6,700 languages spoken today are in danger of disappearing before the century ends, a process that can be slowed only if urgent action is taken by governments and speaker communities. UNESCO?s Endangered Languages Programme mobilizes international cooperation to focus attention on this grave situation and to promote innovative solutions from communities, experts [...]

Emre Sevinç: Readability tests and metrics

2010-05-31T11:56:37+00:00

“Readability tests, readability formulas, or readability metrics are formulae for evaluating the readability of text, usually by counting syllables, words, and sentences. Readability tests are often used as an alternative to conducting an actual statistical survey of human readers of the subject text (a readability survey). Word processing applications often have readability tests in-built, [...]

Emre Sevinç: Piano 2010 – First Prize: Denis Kozhukhin

2010-05-31T07:52:46+00:00

According to Wikipedia, The Queen Elisabeth Music Competition, a founding member of the World Federation of International Music Competitions (1957) has been, since its foundation, considered to be one of the most prestigious and most difficult competitions in existence. It is devoted to violin (since 1951), piano (since 1952), to composition (since 1953) and [...]

Serbülent Ünsal: Kod Kalite Ölçümleri ve Sık Kullanılan Metrikler

Nightwalker — 2010-05-29T20:06:41+00:00

Bütün programcılar yazdıkları kodun iyi olmasını ister ancak iyinin neye karşılık geldiğini bulmak zordur genelde. Bu noktada günlük hayattan aldığımız birtakım dersler vardır aklımızda kalan.

Örneğin yazdığımız kodda mümkün olduğunca az hata çıksın isteriz, eğer hata çıkarsa da en kısa zamanda bizim veya başka bir programcının hatayı çözebilmesini isteriz, ürünümüzde bir değişiklik yapacaksak bunu ürünümüzün diğer bileşenlerini mümkün olduğunca az etkilemesiniz isteriz.

Bütün bunlar kurumsal dilde, yazdığımız kodun hatasız, esnek, kararlı, anlaşılır, düşük bakım maliyetine sahip olması demektir. Ancak normal şartlarda bunları ancak yazdığımız kod ürün haline gelip piyasaya çıktığında görebiliyoruz.

İşte tam bu noktada yazılım metrikleri devreye giriyor. Geliştirme esnasında sürekli ölçüm ve iteratif düzeltmeler ile yazılım metriklerini geliştirme sürecinin bir parçası haline getirdiğimizde tasarım ve geliştirme sırasında bize ileride daha büyük maliyetler getirecek pek çok hatadan kurtuluyoruz.

Yazılım mühendisliği ve yazılım kalitesinin ölçümü başlığı altında pek çok kod ölçüm metodu bulunuyor. Bunların hepsini uygulamak pratik olarak çok olası değil, öyleyse bizde piyasada en çok kullanılan metrikleri dikkate alarak bir orta yol bulabiliriz.

Koda dayalı ölçümler

1- Code Coverage
     Yazılan testlerin kodun ne kadarını kapsadığını ölçer. Code coverage için %80 gibi bir oran oldukça iyi görünse de aslında az sayıda basit test yazarak dahi bu orana ulaşılabildiği gözlemlendiği için hedeflenen oranın %100 olması önerilir. (Oran hakkında detaylı bilgi için [1] )

2- Cohesion
    Bu ölçüm sınıfın sorumlu olduğu işlerin kendi içindeki uyumluluğunu ölçer. Her sınıfın tek bir sorumluluğu olmalıdır. [3] [4]. Uyumluluk LCOM (Lack of Cohesion in Methods) adı verilen ölçüt ile bulunur. Değişik türleri bulunan LCOM sınıfta yer alan alanlara metodların ortak erişim sayısını temel alan bir ölçümdür. LCOM3 için bu değer 0 ile 2 arasında değişir ve 1'in üzerindeyse sınıf bölünmelidir. [5]

3- Coupling
    Bir nesnenin diğeri ile etkileşime girmesine denir. Program içerinde mutlaka etkileşim olacaktır, ancak bu ilişkinin nesnelerin implementasyon detaylarından mümkün olduğunca bağımsız olması istenir. Farklı ilişki türleri üzerinden ölçülebilir. En çok kullanılanlardan birisi CBO'dur.
Coupling Between Objects (CBO): Miras alınan sınıflar hariç, sınıfın çalışmak için ihtiyaç duyduğu sınıf sayısıdır. (kısaca importları say :)) Kütüphanelerde bu sayı yüksek olabilir ancak çalıştırılabilir sınıflarda 6 ile 10 arası makul kabul edilebir. [6][9]

4- Cyclomatic Complexity
    Bir metodun içerisinde yer alan karar noktalarının (if, else vb.) sayısıdır. Kabul edilen eşik değer 10'dur.[6] [7] Bunun yanı sıra Essential Complexty denilen bir metrik daha mevcuttur ancak Cyclomatic Complexity'nin daha etkili bir metrik olduğu belirtilmektedir. [8]

5- Cyclomatic Density
   Koddaki karar noktalarının toplam çalıştırılabilir koda oranıdır. 0.14 ile 0.42 arasındaki değerler için kodun basit ve anlaşılabilir olduğu kabul edilir.[6]

6- Response For Class (RFC)
    Bir sınıfta yazılan ve çağırılan toplam metotların sayısıdır. Bu değer yükseldikçe kodun bakımı zorlaşır. Önerilen eşik değer 55 dir. [9]

7- Weighted Methods for Class (WMC)
    Bir sınıfta yazılan toplam metot sayısıdır. Eşik değeri olarak 6 ile 33 arasında değişik rakamlar önerilmektedir. Ancak Cohesion değeri WMC'ye kıyasla daha önemlidir. [6] [9]

8- Class Hierarchy Level veya Depth of Inheritance Tree (DIT)
   Miras ilişkisinde sınıfın üzerinde kaç tane atası olduğunu gösterir. 6'nın üzerinde ise test edilebilirliği çok düşük olduğunu, 2 nin altında ise OO ilkerinin fazla kullanılmadığına işaret eder. Uygulamanın genelinde 2 ve 3 düzeyinde olması hedeflenmelidir. [6]

9- Number of Methods in Class (NOM)
   İdeal değerler 6 ile 20 arasında değişse de 40'ın üzerinde sınıf kesinlikle bölünmelidir. [6] Ancak tek başına bir gösterge olmaktan çok LCOM ile birlikte değerlendirilmelidir.

10- Specialization Index (SIX)
      Kod karmaşıklığını ve bakım maliyetlerini arttırmasından dolayı overload edilmiş fonksiyon sayısının mümkün olduğunca az olması istenir. Bundan dolayı SIX = (Overload Edilmiş Metot Sayısı * DIT) / NOM şeklinde hesaplanır. 1.2 (veya %120)'ye kadar normal kabul edilir.

* Bunların dışındaki ölçülerden metot başına düşen satır sayısının 7-9 arasında olması tavsiye edilse de Cyclomatic Complexty'nin bundan daha önemli olduğu belirtilmektedir. ([2])

Dizayna dayalı ölçümler [11]

1- Afferent Couplings (Ca)
İncelenen paketin dışında yer aldığı halde söz konusu pakete bağımlı paketlerin sayısıdır. Paketin değişmesi halinde etkilenecek paket sayısını gösterir. Bunu paketin sorumluluğun ölçüsü olarak da düşünebiliriz.

2- Efferent Couplings (Ce)
İncelenen paketin kendi dışında kaç tane pakete bağımlı olduğunu gösterir. Paketin yeniden kullanılabilirliğinin ölçüsüdür.

3- Abstractness (A)
İncelenen pakette yer alan soyut sınıfların ve arayüzlerin sayısının paketteki toplam sınıf sayısına oranıdır. 0 ile 1 arasında değişen bu oran 1'e yaklaştıkça paketin esnekliği artar.

4- Instability (I)
I = Ce / (Ce + Ca) şeklinde hesaplanır. 0 ile 1 arasında değişen bu oran 1'e yaklaştıkça paketin kararlılığı azalır. (Yani paketin değişimi sistemdeki başka pek çok paket üzerinde değişiklik yapmayı gerektirir.)

Devam etmeden küçük bir not girelim araya. Karalılık genelde iyi yönde yorumlansa da bir paketin tamamen kararlı olması demek paketin değiştirilebilirliğinin de minimum düzeyde olması anlamına gelir. Bu durumda hangi paketlerin esnek hangi paketlerin daha az esnek ama kararlı yapıda olmasını istediğimizi sorgulamalıyız. Bu konuda cevabı bize "Open/Closed Principle" veriyor. Buna göre yazılımı oluşturan birimler geliştirilmeye açık ancak değiştirilmeye kapalı olmalıdır. Bu noktada hangi tür sınıflar geliştirilmeye açık diye bakarsak soyut sınıfları ve arayüzleri görürüz.

Sonuca bakarsak; Abstractness = 1 ve Instability = 0 olduğu durumda hem kararlı hem de değiştirilebilir paketleri buluruz. Aynı biçimde Abstractness = 0 ve Instability = 1 olduğu durumda ise kararsız ancak değişime kapalı (ve böylece başka paketlerin değişimini gerektirmeyecek) durumdaki paketleri buluruz.

Ancak incelediğimiz paketler her zaman bu iki ideal durumdan birinde olmazlar. Bu durumda bu iki değerin dengede olması yani ;(A,I) = (1,0) dan (0,1) e gittikçe aynı miktarda değişmesi tasarımımız için optimal çözüm olarak görülebilir. Bunu grafiksel olarak ifade edersek;

Main Sequence denilen bu çizgi üzerinde yer alan bütün noktaları ideal noktalar kabul ettiğimize göre bunların dışında elde ettiğimiz değerleri bu çizgiye olan uzaklıklarına göre değerlendirebiliriz. Tasarım veya yeniden yapılandırma sırasındaki amacımız paketlerimizin bu çizgi üzerinde ve çizgiye en yakın durumda olmasıdır.

5- Distance from the Main Sequence (D)
D = |A+I-1| ile hesaplanır ve 0 ile 1 arasında değişir. 0 olması analiz edilen pakete ait değerin Main Sequence çizgisinin üzerinde olması demektir.

Bunların yanı sıra kod tekrar sayısı ile dizayn ve kod izlenebilirliği de dikkate alınması gereken unsurlardır. Kod tekrarı için bütün proje içerisinde kod tekrarı yapılan bölümler tesbit edilerek uygun biçimde (ortak sınıflar, soyut sınıflar, arayüzler) yeniden tasarlanmalıdır. Dizayn ve Kod izlenebilirliği ise (Tasarım belgelerinde yer alan birimlerin, uygulamadaki birimlere (sınıf,modül vb.) oranı) de yazılımın kalitesini belirleyenbir unsur olarak görülebilir.

[1] http://codebetter.com/blogs/patricksmacchia/archive/2009/06/07/high-test-coverage-ratio-is-a-good-thing-anyway.aspx

[2] http://stackoverflow.com/questions/312642/how-many-classes-per-package-methods-per-class-lines-per-method

[3] http://www.cihataltuntas.com/?p=111

[4] http://en.wikipedia.org/wiki/Single_responsibility_principle

[5] http://javaboutique.internet.com/tutorials/coupcoh/

[6] http://www.mccabe.com/pdf/McCabeCodeQualityMetrics-OutsourcedDev.pdf

[7] http://javaboutique.internet.com/tutorials/metrics/

[8] http://www.nasa.gov/centers/ivv/ppt/172536main_Mike_Chapman_The_Relationship_of_Cyclomatic_Complexity_Essential_Complexity_and_Error_Rates.ppt

[9] http://www.issre2009.org/archive/2006_supplemental/student_papers/An_Investigation_of_CK_Metrics_Thresholds.pdf

[10] http://support.objecteering.com/objecteering6.1/help/us/metrics/metrics_in_detail/specialization_index.htm

[11] http://www.objectmentor.com/resources/articles/oodmetrc.pdf

Emre Sağlam: Gnome and the glslideshow screensaver setup.

2010-05-25T20:23:00+00:00

First of all, setting up screensaver configurations in gnome is a total mess. I don’t know why they decided to release and use gnome-screensaver instead of using xscreensaver. And I don’t want to know either.

My ubuntu setup is an archaic one. It’s an upgrade over an upgrade over an upgrade. I probably upgraded 4 or 5 times. So my config files might be overwritten, wrongly upgraded, etc… But I was having this horrible issue of not being able to setup my glslideshow settings.

You can search this online. Mainly people are complaining about how to setup the directory from where glslideshow reads the images, also how to set it up so that it doesn’t idiotically show the same images 5 times over and over again. Well I’ll repeat these in this blog post and some more which are not covered.

Initial Setup:

First of all to setup the directory to read the images go to your home directory and create/edit file .xscreensaver like the one below:

imageDirectory: /home/username/Pictures/Slideshow/or/wherever

This sets up your screensavers that are using images, to use this directory instead of /usr/share/backgrounds (the default directory). Some people on the internet tells you to symlink it to your directory, but I think this is a far better way of doing it.

If you read the glslideshow manual (RTFM), it tells you that by default glslideshow pans an image for 6 seconds (Ken Burns/Pan Scale effect) and displays it for 30 seconds. This means that the glslideshow will idiotically display the same image 5 times. (30/6=5)

In order to fix this issue, you will need to tell it to pan it n seconds and display it also n seconds. So the command should be:

/usr/lib/xscreensaver/glslideshow -root -pan 6 -duration 6

(-root means display on the root window which is the way screensavers work)

The configuration for this resides at: /usr/share/applications/screensavers/glslideshow.desktop

Go ahead and edit that file as root and change the line that reads:

Exec=/usr/lib/xscreensaver/glslideshow -root

Exec=/usr/lib/xscreensaver/glslideshow -root -pan 6 -duration 6

Now you are ready to have a slideshow that displays with pan/scale each image for 6 seconds.

And it all doesn’t work…

This is where the shit hit the fan for me. No matter what I did, my glslideshow was still running as /usr/lib/xscreensaver/glslideshow -root (ps aux | grep glslideshow)

After a stubborn and painful few hours I discovered that these settings were being cached in a file called: /usr/share/applications/desktop.en_US.utf8.cache (This is WTF number one)

If you look at this file, it’s a 56 KB cache file of all the settings gnome is reading for all of it’s applications!! I guess it should have been setup to delete it on restart but for some reason it never got deleted…

After renaming this file (never delete them, always rename them ) the slideshow started to run as I wanted it to be.

WTF number two was that when I tried to add new images to my slideshow directory, glslideshow never picked them up. At the end of another painful search I found that the list of images are actually cached in a file called .xscreensaver-getimage.cache under /home/username/tmp/ (username is your username). I got rid of that file…

So now, it looks like I have a slideshow screensaver which kind of works. And hopefully you too…

Emre Sevinç: Comparing top 100 Dutch words to Zipf’s law

2010-05-23T10:54:19+00:00

Recently I was involved with a project that was related to the website of the Universiteit Antwerpen (UA). As a result of my task I developed a system in Python to count the frequencies of all the words that occur throughout the UA website. After spending a few days playing with the data my system [...]

Emre Sağlam: Fire jumping

2010-05-21T04:00:20+00:00

Fire man, originally uploaded by Emre Saglam.

This is a street performer jumping a fire rope while standing on a ball @ the Baltimore Harbor.

Emre Sağlam: White squirrel?

2010-05-19T15:22:54+00:00

White squirrel?, originally uploaded by Emre Saglam.

Emre Sevinç: Matematik ve bilişsel bilim

2010-05-16T10:54:19+00:00

BU CogSci haberleşme grubuna Semih Özlem’den gelen bir iletiyi buraya not etmek istedim, 18 Mayıs Salı günü bir etkinlikle ilgili: Sevgili bilişsel bilimciler, Öncelikle size Boğaziçi Elektronik bölümünde Yağmur Denizhan’ın pazartesi akşamları düzenlediği Chaos toplantıları kapsamında 18 Mayıs 2010 salı günü saat 17:00 da EE Lounge’da, son zamanlarda matematiğin bilişsel yönleriyle ilgilenen matematikçi Alexander Borovik’in ağırlanacağını [...]

Emre Sevinç: Concept Game: A game with a purpose (human-powered AI)

2010-05-11T08:40:07+00:00

A fellow researcher, Amaç Herdağdelen has created an interesting game for his Ph.D. studies and I hope you will have fun playing it. According to him: “Concept Game is a simple yet immersive game where a slot machine generates random assertions and you decide if they make sense or not. Each meaningful assertion is a winning [...]

Emre Sevinç: Security tip of the day: Use htdigest instead of htpasswd for phpMyAdmin and other sensitive stuff

2010-05-11T08:26:41+00:00

I just realized that there was a better alternative to basic authentication for Apache 2.2. According to http://httpd.apache.org/docs/2.1/howto/auth.html: “The most common method is Basic, and this is the method implemented by mod_auth_basic. It is important to be aware, however, that Basic authentication sends the password from the client to the server unencrypted. This method should [...]

Emre Sevinç: Statistical Analysis and the Illusion of Objectivity

2010-05-06T08:00:01+00:00

I have recently found an article written by James O. Berger and Donald A. Berry, and its title is “Statistical Analysis and the Illusion of Objectivity“. It was published in American Scientist, Mar-Apr 1988 issue, Vol. 76 Issue 2, p. 159-165. I think I discovered this article in a blog entry written by Andrew Gelman [...]