Ahmet Sayar

Image Compression and Secure Transmitting System Over Internet

ahmet — Thu, 17 May 2012 21:22:53 +0000

In recent years, many rapid developments in remote sensing and computer security have been made. Especially in the last 15 years, commercially using satellites for remote sensing has been increased intensively due to the decrease in the resolution of satellite images to half a meter and reduction in costs.

The existing security solutions for security related issues produced by several big companies for recent years are not adequate today. Now the big companies and research institutions have begun to come together to produce joint solutions. One of the common security solutions produced is in the field of trusted computing.

Processing and analyzing the images obtained by remote sensing is used increasingly in a wide range of places. As the internet is becoming popular and widespread all around the world, the transmission of digital images has become one of the important issues today. In order to send an image over a certain bandwidth capacity networks, digital images are compressed with image compression algorithms to increase the transmission rate.

In this thesis, secure and fast transmission of compressed images over the internet has been made. For this purpose, a secure image transmission application has been developed. In the secure transmission of images over the internet, new developing technologies such as digital certificates and trusted computing are used. By using “Principal Component Analysis” and “Wavelet Based Transformation” for compression of image, the disk usage of the image has been reduced which enables us to transmit these images over the internet faster.

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Oracle Java Certificate Program (Oracle Java Sertifika Programi)

ahmet — Mon, 14 May 2012 22:30:17 +0000

The Sun Certified Java Associate certification has been replaced by the Oracle Certified Java Associate Programmer I certificate exam

Ucret: 300$ Oracle dan brosur aliyorsunuz.

Soru sayisi ve sure: 60 soru Sure 150 dk

Gecme Notu: Gecmek icin enaz 37 dogru cevaplamaniz gerekir. %61 alan gecer

Baslica Konular: (Ozellikle programla dan girecekseniz OCPJP): access control, object orientation, assignments, operators, flow control, assertions, string handling, I/O, parsing, formatting, generics, collections, inner classes, threads and the JDK tools.

Sinav Dili: Testler cesitli dillerde olabiliyor: Ingilizce, Japonca, Cince, Almanca, Korece, Portekizce, Rusca ve Ispanyolca.

Detayli Bilgiye Wiki sayfasindan ulasabilirsiniz:

http://en.wikipedia.org/wiki/Sun_Certified_Professional

Ornek sorulara asagidaki linklerden bakabilirsiniz.

http://www.jchq.net/mockexams/exam1.htm

http://www.akgupta.com/Java/mock_exam.htm

http://certification.about.com/od/certifications/l/blscjp14q1.htm

http://www.javacoffeebreak.com/articles/certification/index.html

http://home-1.tiscali.nl/~bmc88/java/javacert/

http://www.javaprepare.com/quests/test.html

Sinava Hazirlik icin Kitaplar:

Java 2 Certification Training Guide By Jamie Jaworski

Java 2 Exam Cram By Brogan & Brogan

The Complete Java 2 Certification Study Guide By various authors

A Programmer’s Guide to Java SCJP Certification By Khalid Mughal, Rolf Rasussen

ancuez

ahmet — Sun, 19 Feb 2012 18:00:47 +0000

Ancuez hamsi yada sardalya dan yapilan zeytinyagli balik ezmesidir.

Hamsi nin sadece karadeniz’de oldugunu dusunup hic arastirmadan Amerikda’da 3 yil bu taddan mahrum kaldim.

Daha sonra bunun pizzasinin bile yapildigini gordum.

My favorite movies – Favori filmlerim

ahmet — Sat, 18 Feb 2012 14:47:30 +0000

About Schmidt (Schmidt Hakkinda) – 2002

One day (Bir gun) – 2011

The curious Case of Benjamin Button (Benjamin Button’ın Tuhaf Hikayesi ) – 2008
Gladiator (Gladyator) – 2000
The Shawshank Redemption (Esaretin Bedeli) – 1994
Pulp Fiction (Ucuz Roman) – 1994
Schindler’s List (Schindler in Listesi) – 1993
The Dark Knight (Kara Sovalye) – 2008
The Matrix (Matrix) – 1999
The Usual Suspects (Olagan Supheliler) – 1995
Se7en (7) – 1995
Léon – 1994
Memento (Akil defteri) – 2000
The Pianist (Piyanist) – 2002
Back to the Future (Gelecege Donus) – 1985
Eternal Sunshine of the Spotless Mind (Sil Bastan) – 2004
The Green Mile (Yesil Yol) – 1999
Braveheart (Cesur Yurek) – 1995
Batman Begins (Batman Basliyor) – 2005
Jaws (Kopek Baligi) – 1975
Black Swan (Siyah Kugu) – 2010
Big Fish (Buyuk Balik) – 2003
Mystic River (Gizemli Nehir) – 2003
A Beautiful Mind (Akil Oyunlari) – 2001
The Truman Show – 1998
The Exorcist (Seytan) – 1973
Network – 1976
The Bourne Ultimatum (son ultimatom) – 2007
Ben-Hur – 1959
Groundhog Day (Bugun aslinda dundu) – 1993
I am lagend (Ben efsaneyim) – 2007
I robot (Ben robot) – 2004
Robin Hood – 2010
The Good, the Bad and the Ugly (Iyi, kotu ve cirkin) – 1966
Inception (Baslangic) – 2010
Goodfellas (Siki dostlar) – 1990
The Silence of the Lambs (Kuzularin sessizligi) – 1991
Snatch (Kapisma) – 2000
The wizard of Oz (Oz buyucusu) – 1939
The Gold Rush (Altina hucum) – 1925
Magnolia (Manolya) – 1999
The Sixth Sense (6. his) – 1999
Reservoir Dogs (Rezervuar kopekleri) – 1992
The Godfather (Baba) – 1972
The Lord of the Rings (Yuzuklerin efendisi) – 2001

ford ve yetkili servisleri

ahmet — Thu, 09 Feb 2012 10:53:07 +0000

Ford ‘un yetkili servisleri LPG yani tuplu araclara hicbirsekilde hizmet sunmamaktadir.

Araba alacaklara FORD almamalarini tavsiye ederim.

Daha oncesinde servis icin gittigimde “tupu araclarin motor aksamina bakmiyoruz” derlerken, gecen gun gittigimde egsoz degisimi de yaptiramadim.

Ben Izmit civarinda oturuyorum ve yetkili servis ESOTO.

Grid Computing ve Cloud Computing karşılaştırması

ahmet — Fri, 26 Aug 2011 15:17:48 +0000

Cloud computing, Grid computing’in ihtiyaclar doğrultusunda doğal evriminin bir sonucudur.

Karşılaştırma:

1) Çok basit temel terimler ile

-Grid şöyle söyler: Domainimize ve çalişmalarımıza, daha fazla hesaplama gücü alabilmek için kaynaklarını paylaşarak katıl.

-Cloud şöyle söyler: İhtiyacından bile daha fazla hesaplama gücü sağlayabiliriz. Sadece bize ne istediğini söyle biz sana veririz.

2) Daha teknik terimler ile

-Grid computing bircok dağıtık bilgisayarın bir ptoblemin çözümü için aynı anda uygulamasıdır. Bu problem genelde cok büyük hesaplama gücü gerektiren ve/veya cok büyük veri kümelerine ulaşıp işleyen scientific veya teknik problemdir. Genellikle, kullanıcıların bu servisleri kullanabilmesi için teknoloji altyapısı ile ilgili bilgiye ihtiyaçları vardır.

-Cloud computing ise bilgisayar teknolojilerinin internet tabanlı kullanımıdır. Bu bir dağıtık hesaplama sistemidir. Bu sistem içersinde scalable ve virtual kaynaklar inmternet üzerinden birer sermiş gibi sunulur. Kullanıcıların bu servisleri kullanabilmesi için, cloud teknoloji altyapısı ile ilgili bilgi ve uzmanlığa ihtiyacları yoktur.

Grid Computing vs Cloud Computing

ahmet — Fri, 26 Aug 2011 14:58:43 +0000

Cloud computing is a natural evolution of concepts in Grid computing.

Comparison:

With very basic terms:

Grid says: “Let’s join our domains and efforts by shaing your resurces in order to get more computational power”.

Cloud says: “We can provide you more computational power than what you need. Just tell us what you want and we will give it to you”.

With more technical terms:

-Grid computing (computational grid) is the application of several computers to a single problem at the same time — usually to a scientific or technical problem that requires a great number of computer processing cycles or access to large amounts of data. Users mostly need to have knowledge of technology infrastructure to utilize the Grid services.

-Cloud computing is Internet (“cloud”) based development and use of computer technology (“computing”). It is a style of computing in which dynamically scalable and often virtualised resources are provided as a service over the Internet. Users need not have knowledge of, expertise in, or control over the technology infrastructure “in the cloud” that supports them.

Information Services for Grid/Web Service Oriented Architecture (SOA) Based Geospatial Applications

ahmet — Sun, 08 May 2011 21:31:28 +0000

Geographical Information Systems (GIS) presents data-intensive environment for
acquiring, processing and sharing geo-data among interested parties. In order to serve
geographical information to users in such environment, Service Oriented Architecture
(SOA) principles have gained great importance. In SOA-based systems, Information
Services support the discovery and handling of these geospatial services.
Some options for Information Services in SOA-based GIS systems include a) the Open
GIS Consortium (OGC) Web Registry Service (WRS) and b) the Universal Description,
Discovery, and Integration (UDDI). WRS is an OGC standard to discover/publish service
information of geospatial services. It presents a domain-specific registry capability for
geospatial information. UDDI is domain-independent standardized method for
publishing/discovering information about Web Services. As it is WS-Interoperability
(WS-I) compatible, UDDI has the advantage being interoperable with most existing
Grid/Web Service standards.
This study presents an approach combining domain-specific registry capabilities of WRS
and WS-I compatible UDDI Specifications. We extend UDDI Information Model to
support geospatial services. Our approach supports not only quasi-static, stateless
metadata, but also more extensive metadata requirements of rich interacting systems. The
implementation of our approach is being used to support a GIS workflow system which is
a part of NASA Solid Earth Virtual Observatory (SERVO) Grid project.

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OGC Compatible Geographical Information Systems Web Services

ahmet — Sun, 08 May 2011 21:26:49 +0000

The Open Geospatial Consortium (OGC) defines a number of standards, both for data models
and for online services, that has been widely adopted in the Geographical Information System
(GIS) community. This has lead to a number of software development efforts, online data
archives, and application communities. We survey these in the first part of this report. We
furthermore find that the OGC standards are very compatible with Web Services standards,
although they are not technically implemented this way. We therefore, in the second part of
this report, describe our group’s efforts to reimplement OGC standard services as web
services. We focus particularly on the Web Map Service.
We also have built bridging services that allow our Web Service compatible WMS to interact
with non-Web Service versions of WMS. Cascading WMS is the key point in our proposed
solution for the interoperability problems in the GIS WMS services. Since Web Service
oriented WMS has different request response paradigm from non-Web Service versions, we
have extended cascading WMS by adding request handler functionality. This kind of WMS
behaves like both a cascading WMS and a proxy to handle different types of requests to
overcome interoperability problems between different WMS systems.

Implementing GIS Grid Services for the International Solid Earth Research Virtual Observatory

ahmet — Sun, 08 May 2011 21:23:59 +0000

We describe our continuing work on implementing Open GIS Consortium (OGC) compatible Grid
Services for the International Solid Earth Research Virtual Observatory. Our initial efforts focused
on collecting Earthquake and GPS data from various sources, converting them to GML and
enabling query capabilities using pure Web Services approach. We have extended this work by
creating Web Services implementations of OGC-Web Feature Service and OGC-Web Map Service
for serving GML-formatted data. We also describe a Fault Tolerant High Performance Information
System (FTHPIS) to tie these services together.

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