Baki Koyuncu

Vibration isolation for laser light scattering from liquid surfaces

Light scattering studies of thermally excited capillary waves at fluid interfaces are peculiarly susceptible to disturbance by external vibration even with a vibration-isolated optical table. The simple expedient of freely suspending the sample cell above the stable is shown to substantially reduce the sensitivity of the system to such perturbation.

A Scenario Based Virtual Military Sandbox Implementation Using Web Services

In this paper, a tactical military software, called “Sand-box”, which was implemented using .NET framework, was presented. The tool enables commanders to visualize the battlefield and obtain recent information about the operations in order to give efficient decisions. The system extensively uses XML based data in order to provide a flexible structure and ease the transmission of data between distributed decision makers or intelligence agents. Graphical features, used in the system, presents a better view of the battlefield using real terrain data obtained from USGS DEM format.

Using Lanchester Combat Models to aid battlefield visualization

A menu driven software application was developed in order to visualize military battlefields in a virtual environment. Military units were drawn on real terrain data. Some animation features were also introduced. Developed system used Lanchester Combat Model which was developed for evaluating which of the two forces will be victorious after the battle and how the system will reveal the fog of war.

A laser quadrant detection technique for capillary wave measurements

Abstract A new laser detection technique was introduced to measure the height, slope and frequency of wind-driven capillary waves in a water tank. A quadrant detector was used to detect the wave heights in the range of 0.20mm to 12.1 mm for wind speeds of 2.4 m/s–8.8 m/s. The highest measurable wave slope angle was around 40 °. The frequency of the waves was dependent on the wind speeds and the majority of high-frequency waves occurred at higher wind speeds.

Semi-automatic determination of scattering vector in small-angle light scattering

An electronic system is described for semiautomatic determination of the scattering vector in small-angle light-scattering experiments. The method is simple and capable of complete automation. It has been applied to photon correlation spectroscopy of light scattered at the liquid surfaces and typical results are presented.

Photoacoustic imaging of subsurface features in metals

Abstract Photoacoustic signals as a function of the sample coordinates were recorded by using laser beam scanning techniques. Examples of subsurface imaging are presented for nondestructive evaluation of the samples.

Resonant characteristics of PZT-4 transducers for photoacoustic signal detection

Abstract Rectangular and circular types of PZT-4 transducers have been studied. Their resonant frequencies were determined in different media and related to the photoacoustic signal generation. Recommendations were made for maximum signal detection with these transducers.

Intelligent Hospital Management System (IHMS)

An intelligent hospital information management system was developed to assist the patient at the front desk of a hospital. The patient will be able to learn about the doctors, appointment times, relevant departments, laboratory tests and the specific medicine about his/her medical situation. System will provide an intelligent front desk information service for the patients at the hospital entrance. It will also provide software assistance for the doctors to diagnose easily and rapidly by using the programs decision mechanism.

Reconstruction of an Archeological Site in Real Time Domain by Using Software Techniques

A Roman temple named Temple of Augustus is reconstructed in real time by using virtual reality techniques and programming. The temple in ruins in its present form is considered. Reconstruction of the temple is animated in slow speed in front of the onlookers and it is brought to its former glory. Special effects of movements, lighting and rendering are deployed to make the final appearance of the temple real life like. Unity game engine is included during the reconstruction and visitors are provided with movement around the temple.

Üç Boyutlu Lazer Tarayıcı ve Bilgisayar Teknikleri ile Cisimlerin Sanal Ortama Aktarılması

Bu projede ana amac belirli buyukluklerdeki nesnelerin makul bir sure zarfinda 3 boyutlu (3B) modellerini cikarabilecek, dusuk maliyetli bir 3B tarayici insa etmektir. Boyle bir sistemin yapimi sirasindaki degerlendirmelerde maliyet, isabetlilik, nesne buyuklukleri, nesne ozellikleri ve zaman konulariyla ilgili odunlesimler (tradeoffs) acikca belirmektedir. Dolayisiyla, tasarim surecinde bu odunlesimler degerlendirilerek, laboratuar ortamina getirilebilecek buyuklukte, yuzeyleri saydam veya parlak olmayan, hassas nitelikli kulturel degere sahip tarihi eserlerin ya da sanat eserlerinin, orta-yuksek derecede isabetli 3B modellerini olusturabilecek, mumkun oldugunca dusuk maliyetli, bicimli isik kullanan optik bir tarayici yapilmasina karar verilmistir.Yapilan tarayici dogrusal bir Helyum-Neon (HE-NE) lazer isik vericisi, iki standart web kamera, bir adim motoru, motor kontrol karti ve bir kisisel bilgisayar kullanmaktadir. Nesneler, adim motoru ile bilgisayardan hareket ettirilen yuvarlak bir doner platform uzerine yerlestirilerek uzerlerine lazer isik dusurulmekte ve kameralar bu sekilde goruntu almaktadir. Goruntulerde nesne yuzeyine dusen ve yansiyan isigin gozlemlendigi resim ogesi (piksel) pozisyonlari kullanilarak bilgisayar vasitasiyla 3B sanal modeller olusturulmaktadir. Bazi ornek nesneler uzerinde bu adimlar uygulanmis ve sonuc olarak olusturulan 3B modellerin isabetliligi incelenmistir. Oncelikle, 3B tarayicilar ile ilgili yapilan arastirmalar incelenmis ve incelemeler sonucunda ortaya konan bir 3B tarayicilar siniflandirmasi Amac ve Kapsam bolumunde verilmistir. Bu bolumde daha sonra kulturel miras nesnelerinin taranmasi ile ilgili buyuk projeler ozetlenmistir. Materyal ve Yontem bolumunde, ortaya konan tasarima dayanarak ihtiyac duyulacak kuramlar, algoritmalar ve teknikler anlatilmistir. Temin edilen donanimin ve anlatilan tekniklerin uygulamada nasil kullanildigi yine bu bolumunde irdelenmistir. Analiz ve Bulgular bolumu bazi erken tarama sonuclari inceleyerek varilan kararlari belirtmektedir. Son olarak Sonuc ve Oneriler kisminda sistem olusturulurken karsilasilan problemler, olusturulan sistemin degerlendirilmesi ve daha da gelistirilmesi icin yapilabilecek calismalar irdelenmektedir.