This thesis focuses on a Multileaf Collimator design that can shape the beam contour to fit the shape of target geometry and its design improvements. Main purpose of this design is lowering the number of leaves on the multileaf collimator and making the system easier to be controlled. As the Collimator devices undertake the most important point of the beam shaping procedure, ease of control and precision of collimator devices are the major points of operation.
As the radiation therapy is one of the most complex and vital medical operations, this thesis started with the deep literature survey ...Daha fazlası
In this study, the necessary data obtained from the databases (such as MSSQL, Mysql, Postgre SQL, etc.) of the softwares like ETA and NETSİS that are used for preaccountancy of the local and global companies were read, some of the data were written to the databases, and this data was used by the end user by using mobile phones or tablets carrying Android operating systems and working with Internet and cloud technology. In addition, new data sets that are collected on a cloud system from the accounting data while the company is on was studied by genetic algorithms which are one of the artificia ...Daha fazlası
Today, tissue transplant applications are widely used for repair of damaged hard tissue. Despite the gold standard of autografts, interest in synthetic bone grafts produced by tissue engineering techniques is increasing day by day, due to limiting factors such as damage to the tissue site and limited graft availability in allografts, and the risk of developing an immune system response in allografts.Many bioceramic materials, including β-tricalcium phosphate (β-TCP), hydroxyapatite (HA) and calcium sulfate, are widely used in bone tissue engineering. β-TCP has been the most preferred biocerami ...Daha fazlası
The goal of this study is developing custom designed optical tweezer which uses two
He-Ne lasers (λ=632.8 nm) parallel to each other to trap yeast cells. The
characteristic specs of this optical tweezer determined by Brownian Motion of
polystyrene beads in water. Stiffness and trapping forces of optical tweezer
calculated for laser 1, laser 2 and when both lasers used simultaneously. Laser 2 can
trap and move particle to laser 1 and multiple particles can be trapped by the laser 1.
After determination of specs of optical tweezer, yeast cells in yogurt culture medium
were trapped by lase ...Daha fazlası
3D (Dimensional) microtissues are commonly used in regenerative medicine, medicine design, toxicology studies and advance cancer research. Microtissues which are constructed by this technique mimic natural in vivo condition and it stands for shifting form between in vitro studies and in vivo research. Scaffold-free microtissues produce own extracellular matrix and cells proliferate faster. However microtissue is used in vitro experiments, they mimic in vivo condition by producing own matrix.
Recently, RGD peptides which are commonly used biomaterials consist of GRGDS sequences and it has acti ...Daha fazlası
In this work, the effect of temperature on the pressure loss of Newtonian fluid in a fully eccentric annulus with pipe rotation is investigated. For this purpose, initially comprehensive experimental study has been conducted at Izmir Katip Celebi University (IKCU), Fluid Mechanics and Hydraulics Laboratory of Civil Engineering Department. Effect of temperature has been observed for flow velocities from 0.7 m/s to 3.4 m/s, for pipe rotations from 0 rpm to 120 rpm, and for temperatures is from 20 °C to 65 °C. The pressure loss within the test section is recorded. An increase in the liquid temper ...Daha fazlası
Kullanım dışı kalmış olan elektrikli ve elektronik ürünlerin oluşturduğu e-atıklar,
dünyada olduğu kadar ülkemizde de en zorlu ve en önemli atık yönetimi
başlıklarından biri olarak öne çıkmaktadır. Bu tez çalışmasında; e-atıkların geri
dönüşümü hakkında dünyada ve Türkiye’de yapılan çalışmalar, dönüşüm
faaliyetlerinde ilk günden başlayarak günümüze kadar yaşanan gelişmeler ve
e-atıkların çevre ve insan sağlığına verdiği zararlar anlatılmıştır.
Tez çalışması kapsamında, çevre ve insan sağlığını tehdit eden e-atıkların olumsuz
etkilerinden korunmak için e-atık dönüşüm faaliyetlerinin önem ...Daha fazlası
ÖZETBu çalışmada, levrek ve gökkuşağı alabalık filetolarından alternatif bir ürün olarak deneysel balık salamı üretilmiştir. Balık eti kıyma haline getirilmiş ve içerikler uygun oranlarda eklenmiş, akabinde salam hamuru sentetik salam kılıfına doldurulmuştur. Salamlar buzdolabı koşullarında (4 ± 2 ºC) 5 ay boyunca depolanıp analiz edilmiştir.Salamların raf ömrünü belirlemek için kimyasal ve mikrobiyolojik analizler gerçekleştirilmiştir. Kimyasal kompozisyonun belirlenmesi için protein, yağ, nem, kül ve karbonhidrat analizleri yapılmıştır. Depolama periyodunda, kimyasal kalitenin belirlenmesi i ...Daha fazlası
ABSTRACTBulletproof composite armor models are investigated using finite element software ANSYS/AUTODYN. A composite plate is modelled with Kevlar 29/epoxy, analysed, and the results obtained by this model are confirmed with the results available in the literature. Different materials are tested as secondary materials in the composite plate. The results obtained by these materials for unit weight and for residual velocities of the projectile are compared. A new stacking sequence study is conducted with the Kevlar 29/epoxy as primary material and Ultra High Molecular Weight Polyethylene (UHMWPE ...Daha fazlası
ABSTRACTThis thesis includes design, implementation and polymer nanocomposite mixing application of chaotic system based robust delta robot. Blending fluids is a vital process while preparing coating materials. The most commonly used the coating materials are polymeric materials which need to be blended in non-Newtonian fluids. This process is very critical and harder to achieve a perfectly prepared coating material.To achieve superior blending performance, two different and independent chaotic systems were used to chaotify delta robot-based blender system. One of them was used for chaotificat ...Daha fazlası
Bu çalışmada 190 adet, ortalama 1,21±0,69 g ağırlığında olan portakal çiklet (Maylandia estherae) balığı 12 adet akvaryuma 49,6±0,01-54,5±0,02 biyomas aralığında ve eşit sayıda (15 adet) yerleştirilmiştir. Gruplar karotenoid ilavesiz grup (AK), 50 mg/kg oranında total karotenoid içeren astaksantin ilaveli grup (AA), aynı oranda pancar kökü kırmızısı içeren grup (AP) ve aynı oranda kına içeren grup (AI) olarak gruplandırılmıştır. 50 gün süren çalışmada sabah ve akşam olmak üzere günde iki kez elle besleme yapılmıştır. Denemenin sonunda balıklardaki FCR, SGR, YTO ve yaşama oranlarına, spektrofot ...Daha fazlası
ABSTRACTIt is not possible to produce steel without inclusions as the process for steel production requires. Based on this fact, the researches on clean steel are concentrated on the reduction of inclusions and transformation of inclusions into harmless state by modification. The definition of steel cleanness is related to final product application. Non-metallic inclusion, in the liquid steel, causing many problems and production lost in steel production process and final application. Aluminum killed steels mostly contain Al2O3 and MnS inclusions. Al2O3 inclusions are formed during de-oxidatio ...Daha fazlası
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.