Development of microstructural and mechanical properties of aluminum alloys by equal channel angular pressing (ECAP) process Eş kanal açılı presleme (EKAP) yöntemiyle aluminyum alaşımlarının mikroyapı ve mekanik özelliklerinin geliştirilmesi

Yeşil, Mehmet Mahsun

ABSTRACTSevere Plastic Deformation (SPD), applying extreme force to alterate and refine the structures of materials permanently, have a huge potential to improve the mechanical and structural properties of materials superiously. ECAP is a kind of SPD techniques to produce submicron or nano sized grains in the material structure by applying stress to the sample passing through two angular intersected channels have the same diameters. ECAP has recently been becoming one of the most favourable candidate method in the production of nanostructured materials.One of the main objectives of this study ...Daha fazlası

Examination of Spiritual Care Needs of Oncology Patients and Spiritual Care Competencies of Oncology Nurses

Objective: The study aimed to investigate the spiritual needs of oncology patients and spiritual care competencies of oncology nurses caring for the oncology patients. Material and Method: The study has a descriptive and cross-sectional design. The study was carried out with oncology patients (n=324) and oncology nurses (n=17) who were caring for them in oncology unit of a hospital in the city of İzmir, Turkey. The study data were collected using the Spiritual Needs Scale for the patients and the Spiritual Care Competency Scale-T for the nurses. In statistical analysis, number, percentile, mea ...Daha fazlası

Smart business accounting software as an android mobile application using artificial imtelligence

Okyay, Muhammet Serhat

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

Printed Circuit Board Coil Based Electromagnetic Actuator Design For Micro/Milliscale Manipulation

Erdem Doguş AKKUŞ

Trends in nano and micro technologies have directed researchers' concern towards designing small-scale functional systems, i.e., MEMS, NEMS, etc. This study represents a design and implementation scheme for a class of small-scale actuators. Electromagnetic actuators currently used have disadvantages in small-scale applications since they cannot be produced in the desired sizes and compactness due to complex components. Using printed circuit board (PCB) based design strategies, scalable actuators can be produced in a smaller form factor and at a lower cost. The study aims to produce planar PCB ...Daha fazlası

The Current Situation of the Internationalization of Higher Education Institutions In Europe: Case of Türkiye, Belgium, Bulgaria, Czech Republic, Romania and Spain

As the editor of this book, I am honored to present the output of Multicultural Classrooms: Inclusive Learning and Teaching in Higher Education Erasmus+ project. This project, set against the ever-evolving landscape of higher education, stands as a guiding light for academic exploration. It underscores our collective commitment to understanding and promoting diversity within educational settings. In a world that's more interconnected than ever, multicultural classrooms are not just a part of higher education; they are at its very core. This project takes us on a journey across several European ...Daha fazlası

OPG and RANKL levels around miniscrew implants during orthodontic tooth movement

İLKNUR VELİ | ŞÜKRÜ ENHOŞ

Introduction: The aim of this study was to determine the peri-miniscrew implant crevicular fluid receptor activator of nuclear factor-lB ligand (RANKL) and osteoprotegerin (OPG) levels around loaded and unloaded miniscrew implants at different time intervals. Methods: Twenty loaded and 16 unloaded miniscrew implants were included in this study. All miniscrew implants were placed bilaterally between the maxillary second premolars and first molars as anchorage units for canine distalization. Peri-miniscrew implant crevicular fluid was taken from the mesiobuccal aspects of the loaded and unl ...Daha fazlası

Comparison of turbulence models for single and multiphase flows Tek ve çok fazlı akışlar için türbülans modellerinin karşılaştırılması

İlker, Pelin

ÖZETHidrolik mühendisliğinde, çoğu akış rejimi türbülanslıdır. Bu nedenle, türbülans mekanizmasını anlamak ve analiz etmek büyük önem taşımaktadır. Türbülans analizinde en sık kullanılan yöntemlerden biri modellemedir. Bu noktada, doğru türbülans modelini seçmek önemli bir husustur. Bu çalışma, çeşitli türbülans modellerinin performansını incelemeyi ve basınçlı boru sistemlerinde tek fazlı sıvı akışı ve sediment taşınımının türbülans mekanizmasını anlamayı amaçlamaktadır. Bu amaçla, literatürde en çok kullanılan yedi türbülans modeli karşılaştırmalı olarak incelenmiştir.SUMMARYIn hydraulic eng ...Daha fazlası

Simulation of three-dimensional slender droplet motion with adaptive mesh refinement Uyarlanabilir ağ yapısı ile üç boyutlu ince damla hareketi simülasyonu

Özdoğan, Mert

ABSTRACTWhile droplet moves over surfaces, various structures are observed cusp and corner formation, pearling, pinning/depinning, to name a few. We develop a finite element method (FEM) based solver to analyze three-dimensional motion of slender droplets over several substrates. To get accurate results within a feasible computation time, an adaptive mesh refinement (AMR) based on non-conformal, balanced and preload quadtree mesh structure is embedded within our quadratic FEM solver to focus our computational power on specific regions like contact lines. We validate our solver with the power-l ...Daha fazlası

Simulation of immiscible displacement of petroleum via second and third order finite differencing techniques İkinci ve üçüncü dereceden sonlu farklılaştırma yöntemleriyle petrolün karışmadan ötelenmesinin sayısal benzetimi

Ünal, Osman

Özet:Konveksiyonun egemen olduğu akışların sonlu fark yöntemi ile simülasyonu ve gözenekli ortamlarda taşınım, önemli sayısal dağılım ve fiziksel olmayan salınım problemlerine sahiptir. Leonard, taşınım teriminin geri besleme duyarlılığı açısından farklılıklarını kapsamlı bir şekilde araştırmıştır. Geri besleme duyarlılığına göre, kararlı sayısal çözümler alabilmek için negatif geri besleme duyarlılığı elde edilmesi gerekmektedir. Geri besleme hassasiyet katsayısı ne kadar büyük olursa, salınımları baskılayan şema o kadar etkindir. Konveksiyon teriminin ikinci dereceden merkezi farkı, potansiy ...Daha fazlası

Control of rotary inverted pendulum system with learning feedback linearization based stable robust adaptive controller Öğrenen geri beslemeli doğrusallaştırma tabanlı kararlı gürbüz uyarlanır denetleyici ile dönel ters sarkaç sisteminin kontrolü

Soydemir, Mehmet Uğur

73 sayfa 29 cm. 1 CD

Experimental Investigation and Numerical Modeling of Fiber Reinforced Concrete Beams for Different Failure Modes

Marwan AL SAMAN

Bu çalışma temel olarak, Beton Plastikleşme Hasar modelinin (ing. Concrete Damaged Plasticity CDP) ve Değiştirilmiş Basınç Alanları Teorisi (ing. Modified Compression Field Theory, MCFT) formülasyonlarının doğrusal olmayan sonlu elemanlar yöntemine uygulanmasının etkinliğini değerlendirmeyi amaçlamaktadır. Farklı boyutlar, kullanılan çelik lif miktarı, beton dayanımı ve çekme donatısı oranı gibi geniş ölçekli değişkenleri kapsayan iki kiriş grubu üzerinde incelemeler gerçekleştirilmiştir. Birinci grup kirişler literatürden alınmış, ikinci grup kirişler ise İzmir Katip Çelebi Üniversites ...Daha fazlası

Control and simulation of swarm mobile robots

Şen, Hayrettin

This thesis presents both control of mobile robots that can move by using collective motion algorithm and simulation of the robots during the motion. The orientation of the robots was controlled remotely by one user during the collective motion. The transmission of orientation data from the remote controller to the robots was done by using XBee modules. The control algorithm of collective motion was developed by using individual-based model. Two modes are considered during the control. These modes are search and swarm mode. The collective motion was performed by robots that are moving with re ...Daha fazlası