Browsing by Keywords "Efficiency"
Now showing items 1-20 of 62
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Accuracy and efficiency considerations in the solution of extremely large electromagnetics problems
(IEEE, 2011)This study considers fast and accurate solutions of extremely large electromagnetics problems. Surface formulations of large-scale objects lead to dense matrix equations involving millions of unknowns. Thanks to recent ... -
Capacity analysis of a PMR system with DAB downlink
(IEEE, 2003)Several trunked private mobile radio (PMR) systems have been designed over the last decade, most of which have symmetric downlink and uplink channel capacities. These systems may not be spectrally efficient in case of group ... -
A charge inverter for III-nitride light-emitting diodes
(American Institute of Physics Inc., 2016)In this work, we propose a charge inverter that substantially increases the hole injection efficiency for InGaN/GaN light-emitting diodes (LEDs). The charge inverter consists of a metal/electrode, an insulator, and a ... -
The comparative performance of the public enterprise sector in Turkey: a Malmquist productivity index approach
(Academic Press, 1997)The public enterprise sector in Turkey has grown appreciably since the 1950's and has made a marked impact on aggregate production, employment, and saving. However, since the early 1980's, public enterprises have been ... -
Comparative study of optically activated nanocomposites with photocatalytic TiO2 and ZnO nanoparticles for massive environmental decontamination
(S P I E - International Society for Optical Engineering, 2007)Nanocomposites that incorporate TiO2 and ZnO nanoparticles separately in three-dimensional solgel matrices through full chemical integration are prepared to perform highly efficient photocatalytic activities for applications ... -
Comparative study of thin film n-i-p a-Si: H solar cells to investigate the effect of absorber layer thickness on the plasmonic enhancement using gold nanoparticles
(Elsevier Ltd, 2015)In this paper, the effect of gold nanoparticles on n-i-p a-Si:H solar cells with different intrinsic layer (i-layer) thicknesses has been studied. 100nm and 500nm i-layer based n-i-p a-Si:H solar cells were fabricated and ... -
Contests over joint production on networks
(Wiley, 2020)We consider a network of heterogeneous agents where each edge represents a two‐player contest between the respective nodes. In these bilateral contests, agents compete over an endogenous prize jointly produced using their ... -
Coupling and power transfer efficiency enhancement of modular and array of planar coils using in-plane ring-shaped inner ferrites for inductive heating applications
(American Institute of Physics Inc., 2017)We propose and demonstrate a highly effective method of enhancing coupling and power transfer efficiency in inductive heating systems composed of planar coils. The proposed method is based on locating ring-shaped ferrites ... -
Delegation in a duopolistic differentiated goods market with Bertrand competition
(Bilkent University, 1995)The impact of delegation in a firm has been observed by many modern authors. Vickers(1985), Fershtman and Judd(1987), Sklivas(1987) considered the problem as part of positive economic theory whereas Koray and Sertel(1989) ... -
Delegation in a duopolistic differentiated goods market with Cournot competition
(Bilkent University, 1995)We consider the impact of delegation in a Cournotic duopoly with differentiated goods upon the firms’ profit maximization behavior. In an oligopoly, delegation in each firm can be modeled through a specific non-cooperative ... -
Design and analysis of mechanisms for decentralized joint replenishment
(Elsevier B.V., 2017)We consider jointly replenishing multiple firms that operate under an EOQ like environment in a decentralized, non-cooperative setting. Each firm's demand rate and inventory holding cost rate are private information. We ... -
Dynamic power supply design for varying envelope signals using envelope tracking method
(Bilkent University, 2012)In modern communication systems, demand for higher data-rate is consistently growing. Higher data-rate within a limited bandwidth tends to require more amplitude modulation (AM) to increase number of symbols per ... -
Effect of discrete batch WIP transfer on the efficiency of production lines
(Taylor & Francis, 1993)In this paper, the effect of discrete batch transfer of WIP between workstations on the efficiency of asynchronous production lines is analysed via a simulation model. The processing times are assumed to be random variables ... -
The effects of privatization on efficiency: how does privatization work?
(Pergamon Press, 2006)Uncovering the effects of privatization is difficult, because privatization of a particular firm usually is not an accident. This paper tests the effects of privatization on productive and allocative (market) efficiency ... -
Efficiency and stability of probabilistic assignments in marriage problems
(Academic Press, 2016)We study marriage problems where two groups of agents, men and women, match each other and probabilistic assignments are possible. When only ordinal preferences are observable, stochastic dominance efficiency (sd-efficiency) ... -
Efficiency of the Turkish stock exchange with respect to monetary variables: a cointegration analysis
(Elsevier BV, 1996)In this study, we test the semistrong form of the efficient market hypothesis in Turkey by using the recently developed techniques in time series econometrics, namely unit roots and cointegration. The long run relationship ... -
An efficient non-Lambertian organic light-emitting diode using imprinted submicron-size zinc oxide pillar arrays
(AIP, 2013)We report phosphorescent organic light-emitting diodes with a substantially improved light outcoupling efficiency and a wider angular distribution through applying a layer of zinc oxide periodic nanopillar arrays by pattern ... -
Efficient ownership patterns: three examples
(Bilkent University, 1994)This stud\^ provides three exanpdes in whicli llie ownership structure of productive assets affects efhciency oF the economic outcome. We show how the incompleteness of contracts and the s])ecificit y of investments ... -
Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer
(Pergamon Press, 2015)In this paper, the effect of angstrom-thick atomic layer deposited (ALD) ZnO embedded layer on photovoltaic (PV) performance of Nanowire-Based All-TiO2 solar cells has been systematically investigated. Our results indicate ... -
Enhancement of polycrystalline silicon solar cells efficiency using indium nitride particles
(Institute of Physics Publishing Ltd., 2015)In this work, we present a hybrid indium nitride particle/polycrystalline silicon solar cell based on 230 nm size indium nitride particles (InN-Ps) obtained through laser ablation. The solar cell performance measurements ...
