1,011 research outputs found
ENGIN-X- instrument for materials science and engineering research
No full textEngin-X is a leading neutron diffractometer for materials science and engineering, with high resolution and versatile capabilities at the ISIS spallation source, UK. Over the past 10 years Engin-X has continually redefined the frontier of stress characterisation capability through investment in state-of-the-art equipment, attracting academic and industrial users from 24 countries. Measurements are typically carried out in collaborative experiments between universities, industry and ISIS to address a wide range of engineering problems: manufacturing challenges surrounding magnesium alloys for the automotive industry, creep deformation of nickel-base superalloys for aero engines, structural integrity of welds for nuclear power plants, residual stresses in a range of samples from complex aerospace components to ancient steel making manufacturing techniques
Zaman pencereli çok işlemcili hibrit akış tipi çizelgeleme probleminin memetik algoritma ile çözümü
No full textEsnek Akış Tipi çizelgeleme problemlerinin herhangi bir aşamada işlerin birden çok işlemcide aynı anda işlenmesine imkan sağlayan yapıya genişletilmesi yeni bir araştırma konusu sunmuştur. NP-Zor olan Çok işlemcili esnek akış tipi çizelgeleme problemi (ÇİEAÇ) k-aşamalı akış tipi üretimde işlenmesi gereken n adet işten (J∈{1,2,…,n}) oluşmaktadır. Her bir aşamada mi özdeş paralel makinenin bulunduğu ve i. işin j. aşamada, sizeij değişkeniyle belirtilen sayıda işlemciye gereksinim duyduğu ve aynı anda işlendiği bir iş çizelgeleme problemidir. Bu çalışmada, ÇİEAÇ probleminin çözümü için Memetik algoritma geliştirilmiş ve en iyi parametre seçimi için deney tasarımı yapılmıştır. Ayrıca, ÇİEAÇ problemine işlerin ortak teslimat süresine sahip olduğu özellik de eklenerek, daha önce literatürde bulunmayan bir problem türü (Zaman pencereli çok işlemcili esnek akış tipi çizelgeleme - ZSÇİEAÇ) geliştirilmiştir. ZSÇİEAÇ problemi çözümünde amaç fonksiyonu, işlerin tamamlanma sürelerine göre erken/geç tamamlanma durumunda ortaya çıkan ceza fonksiyonu olarak alınmış ve problem sonuçları literatüre kazandırılmıştır.Coupling Hybrid Flow Shop (HFS) with multiprocessor task (HFSMT) brought out a new challenging research topic that drew attention among the researchers recently. HFSMT, which is known to be NP-Hard, contains a set of n jobs (J∈{1,2,…,n}) to be processed on k-stage flow shop. There are mi identical parallel processors at each stage and the number of processor that job i requires at stage j is denoted by sizeij. Memetic algorithm in which a global search algorithm is accompanied with local search mechanism is developed to solve HFSMT along with experimental design to determine the best parameter set for each problem set. Also, HFSMT extended by adding a common due window to the problem in which the total penalty incurred by earliness and tardiness of jobs is to be minimized are presented for the first time with this study
Çok kıymetli ve sevgili hocam Prof. Dr. Zeyyat Hatiboğlu
No full textEren, Erol (Dogus Author)Bu satırlarda içimden ne geliyorsa ve ne gibi duygular içindeysem onları yazıyorum. Değerli hocamın sağlığında çıkarmaya çalıştığımız bu armağan kitabında yer almasını arzu ettiğim düşünce ve duygularım kendisiyle yüz yüze kaldığımızda dahi söylemediğim şeylerdir
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Author Correction: Bimetallic synergy in cobalt–palladium nanocatalysts for CO oxidation
No full textIn the version of this Article originally published, the author Baran Eren was mistakenly affiliated with the Harbin Institute of Technology, China; it has now been corrected to Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
Author's response: Ocular photodynamic therapy with verteporfin in pigmented and amelanotic choroidal melanoma
No full textBaudelaire, Ikbal ve Asya’da Insanin Yaratilisa ve Verili Olana Müdahalesi
No full textsame nation or the same author in terms of subject, motivation, and form. It is also possible that the studies in this discipline, whose exact boundaries cannot be mentioned, can address these three items together, or two or only one of them. This discipline, which emphasizes the similar and different sides of the texts, also emphasizes the causes of differences and similarities. This branch of science, which sees literature as a whole, aims to find all possible affinities of intercultural and intertextual relations and their reasons in works of different or the same period. In this context, the main criterion is that suitable motifs or thoughts can be handled in a common context in terms of comparability. In this study, Les Fleurs du Mal of Charles Baudelaire; The poem titled a Conversation Between God and Man by Muhammed Ikbal and the art poem of Arif Nihat Asya was primarily studied thematically. Different and common aspects of the texts were emphasized. The 'Pluralist Method' used in comparative literature science was taken as the basis.Karsilastirmali edebiyat bilimi, farkli uluslara ya da ayni ulus veya ayni yazara ait en az iki eserin konu, düsünce ve biçim açisindan incelenmesini esas alir. Kesin sinirlarindan söz edilemeyen bu bilim dalindaki çalismalarin bu üç maddeyi birlikte veya ikisini ya da tekini konu edinmesi de mümkündür. Metinlerin, ortak, benzer ve farkli yanlarini açik etmeyi hedefleyen bu disiplin özellikle metinlerdeki farklilik ve benzerliklerin nedenleri üzerinde durur. Farkli veya ayni zaman dilimindeki eserlerde, kültürlerarasi ve metinlerarasi iliskilerin olasi tüm yakinliklarini ve bunlarin nedenlerini açik etme de bu hedefler arasindadir. Bu baglamda temel kriter, mukayese edilebilirlik açisindan uygun motif ya da düsüncelerin ortak baglamda ele alinabilmesidir. Bu çalismada, Charles Baudelaire’in Sonsöz Tasarisi adli siiri, Muhammed Ikbal’in Allah ile Insan Arasinda bir Konusma baslikli siiri ile Arif Nihat Asya’nin Sanat baslikli siiri, öncelikle tematik açidan incelendi. Metinlerin ortak, benzer ve farkli yanlari üzerinde duruldu. Çalismada karsilastirmali edebiyat biliminde kullanilan yöntemlerden ‘Çogulcu Yöntem’ esas alindi
A secure and efficient inventory management system for disasters
No full textOver the last three decades, disasters worldwide claimed more than 3 million lives and adversely affected the lives of at least 1 billion people (Noji, 1997). Regarding the threats posed by these disasters, emergency disaster management has emerged as a vital tool to reduce the harm and alleviate the suffering these disasters can cause to their victims. A significant task of planners involved in emergency disaster management is planning for and satisfying the vital needs of the people located in emergency shelters such as the Superdome in New Orleans. This thesis proposes a novel and comprehensive framework for the development of a humanitarian emergency inventory management system based on the real-time tracking of emergency supplies and demands through the integration of emerging technologies such as Radio Frequency Identification Devices (RFID) for commodity tracking and logistics. The novelty of this thesis is that, for the first time in the emergency inventory management field, the proposed approach combines an offline planning strategy with online control techniques in a unified framework. Within this framework, the offline planning problem is solved by the stochastic humanitarian inventory management approach, whereas the online modeling strategies include the application of neural network-based functional approximation, simultaneous perturbation stochastic approximation (SPSA), and continuous time model predictive control (CMPC) techniques. Unlike previous studies, the flexibility of the proposed inventory management and control model allows the application of the developed mathematical model to extreme events making online real-time tracking possible. Realistic case studies built using information available from past disasters are used to examine the differences in inventory strategies for different types of disasters based on the impact area and duration of the extreme event. The proposed methodology is also capable of representing and understanding real-life cases where uncertainty and limitations on the inventory levels and flow of supplies can be modeled by introducing different levels of stochasticity and real-life constraints. The overall findings of this thesis have pointed out that the proposed integrated framework can be efficiently used for emergency inventory planning and inventory control during disaster relief operations without ignoring the real-world uncertainties, fluctuations, and constraints of disaster conditions.Ph. D.Includes bibliographical referencesIncludes vitaby Eren Erman Ozguve
Biomechanical comparison of dynamic hip screw, proximal femoral nail, cannulated screw, and monoaxial external fixation in the treatment of basicervical femoral neck fractures
No full text: PURPOSE OF THE STUDY The objective of this study was to establish relative fixation strengths of proximal femoral nail (PFN), dynamic hip screw (DHS), monolateral external fixator (EF), and cannulated screw (CS) in basicervical hip fracture model. MATERIAL AND METHODS The study involved four groups of implanted composite proximal femoral synthetic bones of eight specimens per group; nailing with PFN, DHS, fixation with three cannulated screws, and EF. 70 ̊ osteotomy was performed to simulate a Pauwels Type 3 basicervical fracture. Minimum preload of 100 N was applied before loading to failure. The constructs were subjected to cyclic loading with 16 ̊ to midline from 100 N to 1,000 N for 10,000 cycles at 3Hz. Axial loading was applied at 10 mm/min until failure. Failure load, failure mode, and displacement were documented. RESULTS Mean failure load was 2182.5 ± 377.9 N in PFN group, 2008.75 ± 278.4 N in DHS group, 1941.25 ± 171.6 N in EF group, and 1551.6 ± 236.2 N in CS group. Average displacement was 15.6 ± 4.5 mm, 15.5 ± 6.7 mm, 11.7 ± 1.9 mm, and 15 ± 1.7 mm, respectively. No significant difference was noted among groups for fixation strength except CS group. All CS constructs failed during cyclic loading. CONCLUSION Our findings suggest that PFN, DHS and EF achieved higher fixation strengths than CS in basicervical fracture. PFN has higher failure loads and possesses biomechanical benefits for fixation of unstable basicervical fractures compared with DHS and EF. Key words: basicervical fracture, internal fixation, biomechanics
PDF constraints and results from CMS experiment
No full textWe present and discuss the impact of the most recent CMS data on the precision measurement of and parton density functions
Determination of the Parton Distribution Functions and Strong Coupling by Using Measurement of Jet Cross Sections at = 13 TeV with the CMS detector with a combined QCD Analysis
No full textIn this thesis, a measurement of inclusive jet production is presented as a function of thetransverse momentum pT and the absolute rapidity |y| of jets. The data was recorded inthe CMS experiment at LHC during 2016 and corresponds to 35 fb−1 at the center-ofmassenergy of 13 TeV. The measured cross sections agree with recent perturbative QCDpredictions in next-to-leading-order (NLO) complemented with next-to-leading logarithmresummation accuracy, while the fixed-order predictions at next-to-next-to-leading order(NNLO) accuracy overshoot the data at low pT, for jet cone size of R=0.4. The data are usedin a QCD analysis in order to determine the parton distribution functions (PDFs) and strongcoupling constant, as(MZ), simultaneously. Constraints on gluon distribution and the strongcoupling have been quantified. In addition, the impact of existing measurements of jet and Wboson production and at the center-of-mass energy of 8 TeV, as well as the top quark pairproduction at the center-of-mass energy of 5.02 TeV at the LHC on PDFs are quantified viaincluding them in a QCD analysis
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