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ON SOFT ERRORS IN THE CONJUGATE GRADIENT METHOD: SENSITIVITY AND ROBUST NUMERICAL DETECTION
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Publisher and Date:(SIAM PUBLICATIONS, 2020)The conjugate gradient (CG) method is the most widely used iterative scheme for the solution of large sparse systems of linear equations when the matrix is symmetric positive definite. Although more than 60 years old, it is still a serious candidate for extremescale computations on large computing platforms. On the technological side, the continuous shrinking of transistor geometry and the increasing complexity of these devices affect dramatically their sensitivity to natural radiation and thus ...

On the Classification of Fifth Order Quasilinear Nonconstant Separant Scalar Evolution Equations of the KdVType
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Publisher and Date:(Physical Soc Japan, 2012)Fifth order, quasilinear, nonconstant separant evolution equations are of the form u(t) = A(partial derivative(5)u/partial derivative x(5)) + (B) over tilde, where A and (B) over tilde are functions of x, t, u and of the derivatives of u with respect to x up to order 4. We use the existence of a "formal symmetry'', hence the existence of "canonical conservation laws'' rho((i)), i = 1, . . . , 5 as an integrability test. We define an evolution equation to be of the KdVType, if all odd numbered ...

On the classification of scalar evolution equations with nonconstant separant
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Publisher and Date:(IOP Publishing Ltd, 2017)The ` separant' of the evolution equation u(t) = F where F is some differentiable function of the derivatives of u up to order m is the partial derivative partial derivative F/partial derivative u(m) where um u(m) = partial derivative(m)u/partial derivative x(m). As an integrability test we use the formal symmetry method of MikhailovShabatSokolov which is based on the existence of a recursion operator as a formal series. The solvability of its coefficients in the class of local functions gives ...

On the crossroads of ethics and form: The dialectical image in Krzysztof Kieslowski's Decalogue / Etik ve biçimin kavşağında: Krzysztof Kieslowski'nin Dekalog'unda diyalektik imge
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Publisher and Date:(2021)Leon Battista Alberti, On Painting'de (1435), resim, fotoğraf ve sinemada çerçevelemenin zeminini oluşturan dikdörtgen çerçeveyi "açık bir pencere" (aperta finestra) olarak tanımlar. Bu metafor göz önünde bulundurularak ve Amatör'ün (1979) 'çerçeveleme jesti' başlangıç noktası kabul edilerek, bu çalışmada Kieslowski'nin eserlerinin çerçeveyle ilişkisi ve Alberti'nin finestra modeliyle potansiyellerinin Dekalog'da (1989) nasıl ele alındığı araştırılmaktadır. Kieslowski'nin sinematografik imgenin ...

On the inverse pointsource problem of the poisson equation
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Publisher and Date:(Istanbul University, 2005)In this work a basic inverse heat conduction problem of a simple 2D model with steady state heat source is taken into view. The physical problem is for a square region with uniform thermophysical properties and a point heat source of unit magnitude. To obtain boundary data temperature probes are placed at the midpoints of the sides of the square domain. The objective of the inverse problem is to estimate the coordinates of the point source with the least amount of data. Initially the inverse ...

On the selection of ınterpolation points for rational Krylov Methods
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Publisher and Date:(SpringerVerlag Berlin, 2012)We suggest a simple and an efficient way of selecting a suitable set of interpolation points for the wellknown rational Krylov based model order reduction techniques. To do this some sampling points from the frequency response of the transfer function are taken. These points correspond to the places where the sign of the numerical derivation of transfer function changes. The suggested method requires a set of linear system's solutions several times. But they can be computed concurrently by different ...

On the Time Shift Phenomena in Epidemic Models
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Publisher and Date:(Frontiers Media Sa, 2020)In the standard SusceptibleInfectedRemoved (SIR) and SusceptibleExposedInfectedRemoved (SEIR) models, the peak of infected individuals coincides with the inflection point of removed individuals. Nevertheless, a survey based on the data of the 2009 H1N1 epidemic in Istanbul, Turkey displayed a time shift between the hospital referrals and fatalities. An analysis of recent COVID19 data and the records for Spanish flu (19181919) and SARS (20022004) epidemics confirm this observation. We use ...

On the uniqueness of epidemic models fitting a normalized curve of removed individuals
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Publisher and Date:(Springer Heidelberg, 2015)The susceptibleinfectedremoved (SIR) and the susceptibleexposedinfectedremoved (SEIR) epidemic models with constant parameters are adequate for describing the time evolution of seasonal diseases for which available data usually consist of fatality reports. The problems associated with the determination of system parameters starts with the inference of the number of removed individuals from fatality data, because the infection to death period may depend on health care factors. Then, one ...

On the uniqueness of the octonionic instanton solution on conformally flat 8manifolds
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Publisher and Date:(IOP Publishing Ltd, 2016)Let M be an 8manifold and E be an SO(8) bundle on M. In a previous paper [F. Ozdemir and A.H. Bilge, "Selfduality in dimensions 2n > 4: equivalence of various definitions and the derivation of the octonionic instanton solution", ARI (1999) 51:247253], we have shown that if the second Pontrjagin number p(2) of the bundle E is minimal, then the components of the curvature 2form matrix F with respect to a local orthonormal frame are Fij = c(ij)omega(ij), where c(ij)'s are certain functions and ...

OnLine Transient Stability Assessment Using Matlab Parallel Programming Environment
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Publisher and Date:(IEEE, 2010)Transient Stability Assessment (TSA) is the major part of Dynamic Security Assessment (DSA) in an electric power system. Online TSA has gained more importance for power system security in last two decades. The decreasing costs of hardware and advanced package programs and techniques encourage researchers to apply parallel programming to the problems that are either too much time consuming or impossible to solve using serial computers. The realtime evaluation of TSA is now almost possible thanks ...

Online transient stability assessment using Matlab parallel programming environment
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Publisher and Date:(IEEE, 2009)Transient Stability Assessment (TSA) is the major part of Dynamic Security Assessment (DSA) in an electric power system. Online TSA has gained more importance for power system security in last two decades. The decreasing costs of hardware and advanced package programs and techniques encourage researchers to apply parallel programming to the problems that are either too much time consuming or impossible to solve using serial computers. The realtime evaluation of TSA is now almost possible thanks ...

Ondansetron hydrochloride for the treatment of delirium after coronary artery surgery
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Publisher and Date:(Mosby Inc, 2001)

One Battle and Two Accounts: The Turkish Brigade at Kunuri in November 1950
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Publisher and Date:(Soc Military History, 2016)The recent revival of academic and popular interest in the Korean War in Turkey has played an important role in instigating the production of new books and documentaries. In Turkish accounts the Battle of Kunuri (November 1950) figures more prominently than any other event during the entire conflict. However the Turkish Brigade's performance at this battle remains controversial. This paper assesses the impact of U.S. military assistance on Turkish military's transformation compares and contrasts ...

Onestage surgical correction of congenital thoracic lordosis  report of 2 cases
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Publisher and Date:(Taylor & Francis, 2001)

Ontologybased data acquisition model development for agricultural open data platforms and implementation of OWL2MVC tool
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Publisher and Date:(Elsevier, 2020)In the open data world, it is difficult to collect data in compliance with a certain data model that is of interest to different types of stakeholders within a domain like agriculture. Ontologies that provide broad vocabularies and metadata with respect to a given domain can be used to create various data models. We consider that while creating data acquisition forms to gather data related to an agricultural product, which is hazelnut in this study, from stakeholders of the relevant domain, the ...

Open data in agriculture: Sustainable model development for hazelnut farms using semantics
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Publisher and Date:(Institute of Electrical and Electronics Engineers Inc., 2018)Turkey accounts for 75% of the global hazelnut production and 7075% of the exportation. Taking into account the socioeconomic importance of hazelnut, the stakeholders of hazelnut domain still have problems such as availability, meaningful, accuracy of the hazelnut related data. Providing data to stakeholders is crucial for sustainable agricultural activities. This data should be freely available to everyone to use and republish. With the aforementioned reasons "Open Data" is an efficient way in ...

Open data platform for agriculture: Multi layers perspective / Tarım için açık veri platformu: Çok katmanlı bakışaçısı
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Publisher and Date:(Kadir Has Üniversitesi, 2020)Son yıllarda, daha hassas tarımsal faaliyetler gerçekleştirebilmek amacıyla bilgi ve iletişim teknolojileri (BİT) tarafından desteklenen çeşitli projeler geliştirilmekte ve tarım alanında oldukça yoğun bir şekilde kullanılmaktadır. Bu projeler, nesnelerin interneti (IoT), kablosuz sensörler ağları (WSN), bulut bilişim (CC) ve anlamsal ağ gibi farklı temel BİT terimlerini içine alan yenilikçi ve akıllı araçlarla desteklenmektedirler. Bu projelerin başarıyla uygulanması, çeşitli paydaşların farklı ...

Opportunities for Improvements of the Intermodal Transportation Chain A Case Study of Intermodal Freight Operation Between Turkey and Serbia
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Publisher and Date:(Scientific Research Center Ltd Belgrade, 2014)In order to reduce the external costs of transportation parties of logistics and transportation such as international organizations governments local authorities transporters and users have been promoting the solutions which will be created more efficient results. Within this framework opportunities related to rail transportation and reducing the rate of use of road freight transportation are very important factors in a green environment. This paper focus on the economic and environmental impacts ...

The optical and electrical characteristics of ZnO / MoS2 transparent oxide composite films / ZnO / MoS2 şeffaf oksi̇ti̇n opti̇k ve elektri̇ksel özelli̇kleri̇kompozi̇t fi̇lmler
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Publisher and Date:(Kadir Has Üniversitesi, 2021)Optoelektronikte saydam iletken oksit kullanımı, verimliliği düşürmeden veya maliyeti artırmadan esneklik, dayanıklılık ve taşınabilirlik becerisinin elde edildiği bir devrim yaratmaktadır. ZnO / MoS2 saydam iletken kompozit filmi basit bir süreç oluşu ve düşük maliyeti nedeniyle en önemli yöntem olarak kabul edilen soljel yöntemi ile üretilmiştir. ZnO / MoS2'nin kristal yapı özellikleri, XIşını kırınım modeli (XRD) ile karakterize edilmiştir. XRD spektroskopisi ile, farklı miktarlarda MoS2 ...

Optical and structural properties of solgel made Ce/Ti/Zr mixed oxide thin films as transparent counter electrode for electrochromic devices
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Publisher and Date:(Elsevier Science Bv, 2008)Ce/Ti/Zr mixed oxide thin films were prepared using solgel process with mole ratios from 45/5 to 5/45 of Ti/Zr and 50 of Cc and deposited by dip coating technique. Optical electrochromic and structural properties of such films were investigated. The thickness refractive index and extinction coefficient of the films were calculated through transmission and reflection measurement by an nkd spectrophotometer. The surface morphology and structural behaviors of the films were characterized by atomic ...