TOBB ETU GCRIS Database
Not a member yet
9778 research outputs found
Sort by
Anatomical Evaluation and Preparation Procedure of a Cross- Sectioned Kidney Plastination of a Thoroughbred Horse With Local Polyester Resin
No full textThis study aimed to develop a protocol for the thin section plastination of the kidney with local polyester resin and examine the anatomical details of this specimen. The sample was fixed with 10% formalin fixation solution and then sectioned into 3 mm slices. The four stages of the polyester plastination technique were used. Firstly, the samples were kept in 99.5% acetone baths at-25oC for the dehydration. After this process, the sections were placed in polyester resin and the impregnation process was started at room temperature (20oC) under vacuum. Following the forced impregnation, the curing chambers were constructed and the curing process was continued under ultraviolet light. The data of each applied stage were recorded carefully and the protocol for polyester plastination of kidney sections was successfully established. The specimens were observed from a different point of view with a thin cross-sectional appearance. The anatomical morphology and the structures of the sections of the kidney such as renal parenchyma and circulatory components were preserved well. The final products could be used as educational samples for cross-sectional anatomical training of kidneys
The Role of International Organizations on Building State Capacity for Environmental Migration Management: a Case Study of Kenya
No full textThis thesis investigates the environmental migration management capacity-building strategies and initiatives of the International Organization for Migration (IOM) and their impact on state capacity in Kenya. The case of Kenya is considered suitable for environmental migration management due to its vulnerability to climate change and environmental degradation, leading to frequent natural disasters and population displacement. The country has a significant number of internally displaced persons (IDPs) due to environmental factors. Kenya has collaborated with international organizations (IOs) to strengthen its environmental migration management capacity. The research conducted utilizes a combination of qualitative and mixed methods approaches, incorporating process tracing and semi-structured interviews. This study shows that the IOM's efforts to enhance institutional capacity in Kenya have a positive impact on institutional capacity and result in improved and more efficient methods of managing environmental migration. The study also indicates that the presence of IOs and IOM strengthens the state's environmental migration governance and the state's capacity to address migration caused by environmental factors. However, the study also identifies areas for improvement, such as policy change and climate change awareness.Bu tez, Uluslararasi Göç Örgütü'nün (IOM) çevresel göç yönetimi kapasite gelistirme stratejilerini ve girisimlerini ve bunlarin Kenya'daki devlet kapasitesi üzerindeki etkisini arastirmaktadir. Kenya örnegi, sik sik dogal afetlere ve nüfusun yerinden edilmesine yol açan iklim degisikligi ve çevresel bozulmaya karsi savunmasizligi nedeniyle çevresel göç yönetimini arastirmak için uygun görülmektedir. Ülkede çevresel faktörler nedeniyle önemli sayida ülke içinde yerinden edilmis kisi bulunmaktadir. Kenya, çevresel göç yönetimi kapasitesini güçlendirmek için uluslararasi kuruluslarla is birligi yapmistir. Arastirma, süreç takibi ve yari yapilandirilmis görüsmeleri içeren nitel ve karma yöntem yaklasimlarinin bir kombinasyonunu kullanmaktadir. Bu çalisma, IOM'nin Kenya'daki kurumsal kapasiteyi gelistirme çabalarinin kurumsal kapasite üzerinde olumlu bir etkiye sahip oldugunu ve çevresel göçün yönetilmesinde daha gelismis ve daha etkili yöntemlerle sonuçlandigini göstermektedir. Çalisma ayrica Uluslararasi örgütlerin ve IOM'nin varliginin devletin çevresel göç yönetisimini ve devletin çevresel faktörlerden kaynaklanan göçü ele alma kapasitesini güçlendirdigini göstermektedir. Bununla birlikte çalisma, politika degisikligi ve iklim degisikligi farkindaligi gibi iyilestirilmesi gereken alanlari da tanimlamaktadir
Memristörün Devre İçi Kullanımı ve Grafen Üst Elektrotlu Memristif Biyosensörler
No full textBu proje kapsamında memristörlerin davranışları incelenmiş, analiz edilmiş, modellenmiş ve bu özelliklerden faydalanan biyo-esinli devrelerin simülasyon ve analizleri yapılmıştır. Ayrıca yine aynı memristif özelliklerden faydalanan grafen üst elektrotlu memristif, hassas, seçici, düşük alan ve güç sarfiyatlı biyosensörler geliştirmek için çalışmalar yapılmıştır. Memristör halen genç bir teknolojidir. Basit ve genelleştirilebilir bir modelinin olmaması sebebiyle simulasyon programlarında kullanılan standart bir devre elemanı modeli bulunmamaktadır. Bu proje kapsamında genelleştirilebilir bir model geliştirme konusuna katkı sağlamak amacıyla hem mevcut modeller analiz edilmiş, hem memristörler üretilip, karakterize edilerek, özgün modeller geliştirilmiş, hem de mevcut modellerin ifadeleri üretilmiş memristörlere uyarlanarak devre simülasyonlarında kullanılmıştır. Bu sayede aygıtların davranışını sadık olarak taklit eden ve simülasyon programlarında kullanmaya uygun modeller saptanmış ve geliştirilmiştir. Memristörün doğrusal olmayan davranışı biyolojik sistem dinamiklerine benzediği gibi aynı zamanda eşik altında çalışan Metal-Oxide-Semiconductor (MOS) transistör dinamiklerine de benzemektedir. Bu biçimde çalışan MOS devreler kullandıkları düşük voltaj ve akım değerleri sebebiyle güç sarfiyatı bakımından çok verimlidirler. Bu proje kapsamında Half-Centre Oscillator (HCO) devrelerinden oluşan Central Pattern Generator (CPG) adlı biyo-esinli devrelerdeki osilasyon ritimlerini ve genliklerini kontrol edebilme amaçlı, kendi ürettiğimiz memristörlerin davranışlarını modelleyerek analizler yaptık. Literatürde de artarak görülen memristör+CMOS devre tasarımları memristörün doğrusal olmayan özelliklerini kullanırken devrelerin alan ve güç sarfiyatını minimize etmek için artarak kullanılmaktadır. Eşik altı MOS ve memristörlerin dinamiklerinin doğal uyumu ve verimliliği dolayısıyla bu alanda çalışmalar yapmak nöromorfik sistemlerin gelişimine katkı sağlamıştır. Grafenin biyosensörlerde kullanımı yüksek alan-hacim oranı sayesinde numunenin hareketsiziliğini sağlaması, grafenden numuneye yabancı madde sızmaması ve grafenin yüksek iletkenliği sayesinde elektrot olarak kullanabilinmesi bakımından çok avantajlıdır. Memristör ise zamanla değişen direnci sebebiyle oluşan histeresis özelliği sayesinde hassas bir cihazdır. Bu projeyle grafen üst elektrotlu memristif bir yapılar (mikro ve makro) üretilmiş. Karakterizasyonları gerçekleştirmiş ve makro yapılarda sensör davranışı gözlemlenmiştir. Hassas ve seçici biyosensörler elde etmek için önemli ilerlemeler katedilmiştir. Bu proje disiplinlerarası bir çalışmadır. Proje kapsamında üç yüksek lisans öğrencisi yetiştirilmiş, bir STAR bursiyeri desteklenmiştir. Proje kapsamında yapılan çalışmalar sayesinde hem bulunduğum kurum içerisinde, hem ulusal hem de uluslararsı işbirlikleri sağlanmış ve güçlendirilmiştir
İnsani Yardım Barınma Alanında İç Mimarlık: “shelter Projects” Örnekleri
No full textIn emergency situations where people have to move away from their secure environment, one of the most basic needs that arise in crisis management is shelter. Every year, these types of crises arise due to both natural and human-made disasters. In order to meet the basic needs of displaced people, various sheltering projects are put forward. Disaster sheltering is a field of study that needs to be mastered on its own. Interior architecture is not only a discipline for luxury consumption but also reveals the main field of work that aims to increase the quality of life and to find solutions to the need for accommodation. This study aims to reveal the relationship between the design criteria expressed in the projects and the interior design criteria in disaster sheltering by evaluating the shelter projects implemented in different locations worldwide. The eighth booklet of the “Shelter Projects” reports published by the Global Shelter Cluster (GSC) platform is taken as an example of the study. Interior design criteria for disaster sheltering were read from the analysis data of 15 projects in the report. Using descriptive content analysis, the conducted qualitative research examines the relationship between the literature of the interior architecture discipline and disaster sheltering practice. The study has resulted in an effort to determine the position and significance of interior architectural design practice within the discipline.Yaşanan herhangi bir acil durum insanları yaşadıkları yerlerden uzaklaşmak durumunda bırakıyorsa, kriz yönetiminde ortaya çıkan en temel gereksinimlerden biri barınma olmaktadır. Her yıl gerek doğal afetlerden gerek insani felaketlerden kaynaklı bu tip krizler doğmaktadır. Yerinden edilmiş insanların temel gereksinimlerini karşılamak amacıyla çeşitli barınma projeleri ortaya konmaktadır. Acil durum ve barınma kendi başına uzmanlaşması gereken bir çalışma alanıdır. İç mimarlık sadece lüks tüketime yönelik bir disiplin değil, yaşam kalitesini artırmaya çalışan, barınma gereksinimine çözüm üretmeyi amaçlayan temel çalışma alanını ortaya koymaktadır. Bu çalışmada, dünyadaki aktif sahalardan gelen acil durum barınma projeleri incelenerek, raporlarda ifade edilen tasarım ölçütleri ile acil durum barınma alanında iç mekan tasarım kriterleri arasındaki ilişkinin ortaya konması amaçlanmıştır. Araştırma acil durum barınma alanı ile iç mimarlık disiplininin çalışma sahasının kesiştiğini ortaya koymaya yöneliktir. Global Shelter Cluster (GSC) platformu tarafından yayımlanan “Shelter Projects” raporlarının sekizinci kitapçığı çalışmanın örneği olarak ele alınmıştır. Raporda yer alan 15 projenin analiz verileri, acil durum barınma alanında mekan tasarımına yönelik kriterler üzerinden okunmuştur. Yürütülen nitel araştırma betimleyici içerik analizi kullanarak, iç mimarlık disiplininin literatür ile acil durum barınma pratiği arasındaki bağını irdelemektedir. Yapılan değerlendirme ile iç mimarlık tasarım pratiğinin alandaki yeri ve önemi belirlenmeye çalışılmıştır
Plasma-Assisted Surface Modification and Heparin Immobilization: Dual-Functionalized Blood-Contacting Biomaterials With Improved Hemocompatibility and Antibacterial Features
No full textThe inferior hemocompatibility or antibacterial properties of blood-contacting materials and devices are restraining factors that hinder their successful clinical utilization. To highlight these, a plasma-enhanced modification strategy is favored for surface tailoring of an extensively used biomaterial, polypropylene (PP). The surface activation of the PPs is achieved by oxygen plasma etching and subsequent surface functionalization through amine-rich precursor mediated coating by plasma glow discharge. After optimum plasma processing parameters are decided, heparin (anticoagulant and antithrombic drug) is either attached or covalently conjugated on the PPs' surfaces. The aminated films produced at 75 W plasma power with 15 min exposure time are highly hydrophilic (34.72 +/- 5.92 degrees) and surface active (65.91 mJ m(-2)), facilitating high capacity heparin immobilization (approximate to 440 mu g cm(-2)) by covalent linkage. The kinetic-blood coagulation rate and protein adhesion amount on the plasma-mediated heparinized PPs are decreased about tenfold and 15-fold, and platelet adhesion is markedly lowered. In addition, heparinized-PP surfaces comprise superior antibacterial activity against gram-positive/-negative bacteria conveyed particularly by contact-killing (99%). The heparin-coating did not cause cytotoxicity on fibroblast cells, instead enhanced their proliferation, as shown by the (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) assay. Overall, this simple methodology is highly proficient in becoming a universal strategy for developing dual-functionalized blood-contacting materials
Scheduling a Dual Gripper Material Handling Robot With Energy Considerations
No full textRobotic cells are serial production systems that consist of a number of machines and a material handling robot that transfers parts between the machines. Energy consumption of a robot during its move between two machines can be decreased by carefully selecting its speed. This paper presents models and algorithms that make robot speed and robot activity sequencing decisions together for a dual-gripper robot that can handle two parts simultaneously. We consider both robot energy consumption and cycle time objectives so that a decision maker can observe the trade off between energy cost and throughput rate of the system, and select the best solution among alternatives. Computational experiments demonstrate that proposed approaches can generate efficient solutions for practical size instances, and speed control can significantly conserve energy.Scientific and Technological Research Council of T?rkiye (TUBITAK) [215M845]This study is supported by the Scientific and Technological Research Council of T?rkiye (TUBITAK) , grant #215M845
The Fuel Cell Electric Vehicles: The Highlight Review
No full textTransportation sector is the important sector and consumed the most fossil fuel in the world. Since COVID-19 started in 2019, this sector had become the world connector because every country relies on logistics. The transportation sector does not only deal with the human transportation but also relates to logistics. Research in every country has searched for alternative transportation to replace internal combustion engines using fossil fuel, one of the most prominent choices is fuel cells. Fuel cells can use hydrogen as fuel. Hydrogen can be fed to the fuel cells to provide electric power to drive vehicles, no greenhouse gas emission and no direct combustion required. The fuel cells have been developed widely as the 21st century energy-conservation devices for mobile, stationary, and especially vehi-cles. The fuel cell electric vehicles using hydrogen as fuel were also called hydrogen fuel cell vehicles or hydrogen electric vehicles. The fuel cells were misconceived by several people that they were batteries, but the fuel cells could provide electric power continuously if their fuel was provided continuously. The batteries could provide electric power as their only capacities, when all ions are released, no power could be provided. Because the fuel cell vehicles play important roles for our future transportation, the overall review for these vehicles is significantly interesting. This overall review can provide general and technical information, variety of readers; vehicle users, manufacturers, and scientists, can perceive and understand the fuel cell vehicles within this review. The readers can realize how important the fuel cell technologies are and support research around the world to drive the fuel cell vehicles to be the leading vehicles in our sustainable developing world.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.Faculty of Science and Engineering, Kasetsart University; Chalermphrakiat Sakon Nakhon Province Campus; Kasetsart University Research and Development Institute; Office of the Ministry of Higher Education, Science, Research and Innovation; Thailand Science Research and Innovation through the Kasetsart University Reinventing University Program 2021; Turkish Academic of Science (Turkiye Bilimler Akademisi; TUBA); TOBB University of Economics and TechnologyThis work was financially supported by Faculty of Science and Engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Province Campus, Kasetsart University Research and Development Institute, the Office of the Ministry of Higher Education, Science, Research and Innovation; and the Thailand Science Research and Innovation through the Kasetsart University Reinventing University Program 2021, Turkish Academic of Science (Turkiye Bilimler Akademisi; TUBA) and TOBB University of Economics and Technology
Measurement of the B0s → Μμ Effective Lifetime With the Atlas Detector
No full textThis paper reports the first ATLAS measurement of the B-s(0) -> mu mu effective lifetime. The measurement is based on the data collected in 2015-2016, amounting to 26.3 fb(-1) of 13TeV LHC proton-proton collisions. The proper decay-time distribution of 58 +/- 13 background-subtracted signal candidates is fit with simulated signal templates parameterised as a function of the B-s(0) effective lifetime, with statistical uncertainties extracted through a Neyman construction. The resulting effective measurement of the B-s(0) -> mu mu lifetime is 0.99(-0.07)(+0.42) (stat.) +/- 0.17 (syst.) ps and it is found to be consistent with the Standard Model.We thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently.; We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZS, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Turkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST, ERC, ERDF, Horizon 2020 and Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom.; The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers. Major contributors of computing resources are listed in ref. [23].ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW, Austria; FWF, Austria; ANAS, Azerbaijan; CNPq, Brazil; FAPESP, Brazil; NSERC, Canada; NRC, Canada; CFI, Canada; CERN; ANID, Chile; CAS, China; MOST, China; NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF, Denmark; DNSRC, Denmark; IN2P3-CNRS, France; CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, Germany; HGF, Germany; MPG, Germany; GSRI, Greece; RGC, China; Hong Kong SAR, China; ISF, Israel; Benoziyo Center, Israel; INFN, Italy; MEXT, Japan; JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS, Slovenia; MIZS, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SERI, Switzerland; SNSF, Switzerland; Canton of Bern, Switzerland; Canton of Geneva, Switzerland; MOST, Taiwan; TENMAK, Turkiye; STFC, United Kingdom; DOE, United States of America; NSF, United States of America; BCKDF, Canada; CANARIE, Canada; Compute Canada, Canada; CRC, Canada; PRIMUS, Czech Republic [21/SCI/017]; UNCE, Czech Republic [SCI/013]; COST, European Union; ERC, European Union; ERDF, European Union; Horizon 2020, European Union; Marie Sklodowska-Curie Actions, European Union; Investissements d'Avenir Labex, France; Investissements d'Avenir Idex, France; ANR, France; DFG, Germany; AvH Foundation, Germany; Herakleitos programme - EU-ESF, Greece; Thales programme - EU-ESF, Greece; Aristeia programme - EU-ESF, Greece; Greek NSRF, Greece; BSF-NSF, Israel; MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN, Poland; NAWA, Poland; La Caixa Banking Foundation, Spain; CERCA Programme Generalitat de Catalunya, Spain; PROMETEO Programme Generalitat Valenciana, Spain; GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society, United Kingdom; Leverhulme Trust, United Kingdo
