Mühendislik ve Doğa Bilimleri Fakültesi / Faculty of Engineering and Natural Sciences
Bu bölümdeki koleksiyonlar

Bilgisayar Mühendisliği / Computer Engineering [177]
Bilgisayar Mühendisliği Bölümüne ait koleksiyonunu listeler. 
Biyoinformatik ve Genetik / Bioinformatics and Genetics [211]
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ElektrikElektronik Mühendisliği / Electrical  Electronics Engineering [316]
ElektrikElektronik Mühendisliği Bölümüne ait koleksiyonunu listeler. 
Endüstri Mühendisliği / Industrial Engineering [127]
Endüstri Mühendisliği Bölümüne ait koleksiyonunu listeler. 
Enerji Sistemleri Mühendisliği / Energy Systems Engineering [25]
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Güncel Gönderiler

Surfactantfree onestep fabrication of gelatin/PAAm/MWCNT composites for biomedical applications
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Yayıncı ve Tarih:(Springer, 2021)Welldispersed multiwalled carbon nanotube (MWCNT) and gelatinenhanced polyacrylamide (PAAm) composites were synthesized via a freeradical copolymerization method. MWCNTs were added to the composite mixture in various amounts (0.5 mg, 1.0 mg, 1.5 mg, and 2.0 mg) during the nucleation process in order to increase the conductivity. Gelatin/PAAm/MWCNT composites containing different amounts of MWCNTs were then characterized using the ultravioletvisible (UVvis) spectroscopic technique to illuminate ...

Power transfer networks at RF frequencies "New design procedures with implementation roadmap"
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Yayıncı ve Tarih:(IEEE, 2006)The purpose of this work is to provide the necessary background to design wideband power transfer twoports, or socalled broadband matching networks, at radio frequencies for wireless communication systems. The importance of the topic stems from the recent advances in the conceptual design and manufacturing technologies of the nextgeneration wireless and mobile communication systems, which will operate over ultrawide frequency bands. In fact, for all communication systems, construction of ...

Analysis and Optimization of Matching NetworksII Getting Started with Microwave Office
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Yayıncı ve Tarih:(SpringerVerlag Berlin, 2008)

Analysis and Optimization of Matching NetworksI Getting Started with ADS
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Yayıncı ve Tarih:(SpringerVerlag Berlin, 2008)

A memetic randomkey genetic algorithm for a symmetric multiobjective traveling salesman problem
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Yayıncı ve Tarih:(PergamonElsevier Science Ltd, 2008)This paper proposes a methodology to find weakly Pareto optimal solutions to a symmetric multiobjective traveling salesman problem using a memetic randomkey genetic algorithm that has been augmented by a 2opt local search. The methodology uses a targetvector approach" in which the evaluation function is a weighted Tchebycheff metric with an ideal point and the local search is randomly guided by either a weighted sum of the objectives or a weighted Tchebycheff metric. The memetic algorithm has ...

Design and Implementation of a Cellular Neural Network Based Oscillator Circuit
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Yayıncı ve Tarih:(World Scientific and Engineering Acad and Soc, 2009)In this paper, a novel inductorless oscillator circuit with negative feedbacks, based on a simple version of a "Cellular Neural Network" (CNN) called "CNN with an Opposite Sign Template" (CNNOST) is designed and implemented. The system is capable of generating quasisine oscillations with tuneable amplitude and frequency which can't be provided at the same time in the conventional oscillator circuits.

Conductivity Percolation of Carbon Nanotubes in Polyacrylamide Gels
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Yayıncı ve Tarih:(Intech Europe, 2011)

A heuristic approach for allocation of data to RFID tags: A data allocation knapsack problem (DAKP)
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Yayıncı ve Tarih:(PergamonElsevier Science Ltd, 2012)Durable products and their components are increasingly being equipped with one of several forms of automatic identification technology such as radio frequency identification (RFID). This technology enables data collection, storage, and transmission of product information throughout its life cycle. Ideally all available relevant information could be stored on RFID tags with new information being added to the tags as it becomes available. However, because of the finite memory capacity of RFID tags ...

Maximal linear subspaces of strong selfdual 2forms and the Bonan 4form
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Yayıncı ve Tarih:(Elsevier Science Inc, 2011)The notion of selfduality of 2forms in 4dimensions plays an eminent role in many areas of mathematics and physics, but although the 2forms have a genuine meaning related to curvature and gaugefieldstrength in higher dimensions also, their "selfduality" is something which is almost avoided above 4dimensions. We show that selfduality of 2forms is a very natural notion in higher (even) dimensions also and we prove the equivalence of some scattered and rarely used definitions in the literature. ...

Application of epidemic models to phase transitions
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Yayıncı ve Tarih:(Taylor & Francis Ltd, 2012)The SusceptibleInfectedRecovered (SIR) and SusceptibleExposedInfectedRecovered (SEIR) models describe the spread of epidemics in a society. In the typical case, the ratio of the susceptible individuals fall from a value S0 close to 1 to a final value Sf, while the ratio of recovered individuals rise from 0 to Rf = 1  Sf. The sharp passage from the level zero to the level Rf allows also the modeling of phase transitions by the number of "recovered" individuals R(t) of the SIR or SEIR ...

On the Classification of Fifth Order Quasilinear Nonconstant Separant Scalar Evolution Equations of the KdVType
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Yayıncı ve Tarih:(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 ...

Sorption and Desorption of PVAPyrene Chains in and out of Agarose Gel
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Yayıncı ve Tarih:(Springer/Plenum Publishers, 2012)In situ steadystate fluorescence (SSF) measurement technique was applied to investigation of pyrene labeled Poly(vinyl alcohol) (PVAPy) molecules diffusion in and out of agarose gels. Gel samples with four different concentration of agarose were prepared. PVAPy was synthesized by "click" chemistry method and dissolved in water to use in diffusion experiments. The results were analyzed by using Fickian type diffusion model, and it was found that sorption and desorption processes of PVAPy molecules ...

GELATION MECHANISMS
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Yayıncı ve Tarih:(World Scientific Publ Co Pte Ltd, 2012)In this paper, we survey the gelation mechanisms for various polymeric systems which are classified by the type and the strength of the crosslinkages. These are the "irreversible" gels that are crosslinked chemically by covalent bonds and the "reversible" gels that are crosslinked physically by hydrogen or ionic bonds and by the physical entanglement of polymer chains. Some of the natural polymer gels fall into the class of physical gels, among which the red algae that has attracted attention ...

A MATHEMATICAL DESCRIPTION OF THE CRITICAL POINT IN PHASE TRANSITIONS
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Yayıncı ve Tarih:(World Scientific Publ Co Pte Ltd, 2013)Let y(x) be a smooth sigmoidal curve, y((n)) be its nth derivative and {x(m,i)} and {x(a,i)}, i = 1, 2, ... , be the set of points where respectively the derivatives of odd and even order reach their extreme values. We argue that if the sigmoidal curve y(x) represents a phase transition, then the sequences {x(m,i)} and {x(a,i)} are both convergent and they have a common limit x(c) that we characterize as the critical point of the phase transition. In this study, we examine the logistic growth curve ...

Optimal OnOff Transmission Schemes for Full Duplex Wireless Powered Communication Networks
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Yayıncı ve Tarih:(IEEE, 2020)In this paper, we consider a full duplex wireless powered communication network where multiple users with radio frequency energy harvesting capability communicate to an energy broadcasting hybrid access point. We investigate the minimum length scheduling and sum throughput maximization problems considering onoff transmission scheme in which users either transmit at a constant power or remain silent. For minimum length scheduling problem, we propose a polynomialtime optimal scheduling algorithm. ...

On the Time Shift Phenomena in Epidemic Models
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Yayıncı ve Tarih:(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 ...

Sparse Channel Estimation with Clipping Noise in DCOOFDM Based VLC Systems
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Yayıncı ve Tarih:(IEEE, 2020)In this paper a new computationally efficient and high performance channel estimation algorithm is proposed for DCbiased optical OFDM (DCOOFDM) systems in indoor visible light communications (VLC) in the presence of a clipping noise. The sparse structure of the channel is taken into consideration in the channel estimation algorithm. The algorithm has an iterative structure and aims at reducing the effect of the clipping noise, inevitably generated by the DCOOFDM systems. In te algorithm, the ...

A hesitant fuzzy linguistic terms setbased AHPTOPSIS approach to evaluate ERP software packages
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Yayıncı ve Tarih:(Emerald Group Publishing Ltd, 2020)Purpose In this paper, two popular multiplecriteria decisionmaking (MCDM) methods with hesitant fuzzy logic approach; hesitant fuzzy analytic hierarchy process (hesitant FAHP) and hesitant fuzzy the technique for order preference by similarity to ideal solution (HFTOPSIS) are integrated as HFAHPTOPSIS to evaluating a set of enterprise resource planning (ERP) alternatives and rank them by weight to reach to the ultimate one that satisfies the needs and expectations of a company. Design/meth ...

Audience Tracking and Cheering Content Control in Sports Events
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Yayıncı ve Tarih:(IEEE, 2020)Swearing cheers encountered in sports competitions do not comply with sports ethics and morals. Even if this kind of cheering is a group, the entire tribune block is penalized in accordance with the current rules. This method is not preventive and individual punishment should be used. The aim of this study is to determine the individuals who cheer with swearing content. In this study, the person detection is made with the multitask cascaded convolutional neural network. Moreover, facial landmarks ...

Smart Stethoscope
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Yayıncı ve Tarih:(IEEE, 2020)In this study, a device named smart stethoscope that uses digital sensor technology for sound capture, active acoustics for noise cancellation and artificial intelligence (AI) for diagnosis of heart and lung diseases is developed to help the health workers to make accurate diagnoses. Furthermore, the respiratory diseases are classified by using Deep Learning and Long ShortTerm Memory (LSTM) techniques whereas the probability of these diseases are obtained.