Electronic & Electrical Eng: Recent submissions
Now showing items 421-440 of 750
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Field-induced transformations in the biaxial order of non-tilted phases in a bent-core smectic liquid crystal
(Institute of Physics, 2010)The structural and electro-optic investigations of an achiral bent-core molecule in SmAPA phase, in which the polar directors in the neighboring layers are arranged anti-ferroelectrically, show that it undergoes transformation ... -
Micro-Raman and spreading resistance analysis on bevelled implanted germanium for layer transfer applications
(2011)Raman and spreading resistance profiling have been used to analyze defects in germanium caused by hydrogen and helium implants, of typical fluences used in layer transfer applications. Beveling has been used to facilitate ... -
Design of three-component one-dimensional photonic crystals for alteration of optical contrast and omni-directional reflection
(2010)In this study, three-component One-Dimensional (1D) Photonic Crystal (PC) structures were investigated by modeling them as two-component PCs with an additional regular layer. The Gap Map approach and the Transfer Matrix ... -
Design, fabrication and optical characterization of Fabry-Pérot tunable resonator based on microstructured Si and liquid crystal
(2010)The results of a simulation of the optical properties of a silicon Fabry-Perot resonator (with liquid crystal filler in the cavity), operated on the shift of the interference bands in the infrared range are presented. The ... -
Development of polar order in liquid crystalline phases of a banana compound with a unique sequence of three orthogonal phases
(Royal Society of Chemistry, 2010)Alkyl substituted 4-cyanoresorcinol 1,3-bisbenzoates with terephthalate based rod-like wings show a series of three orthogonal smectic phases SmA?SmAPR?SmAPA. -
Composition and strain in thin Si1-xGex virtual substrates measured by micro-Raman spectroscopy and X-ray diffraction
(2011)Micro-Raman spectroscopy was employed for the determination of the germanium content, x and strain, , in ultrathin SiGe virtual substrates grown directly on Si by molecular beam epitaxy. The growth of highly relaxed ... -
Inertial and bias effects in the rotational brownian motion of rodlike molecules in a uniaxial potential.
(2011)Inertial effects in the rotational Brownian motion in space of a rigid dipolar rotator (needle) in a uniaxial potential biased by an external field giving rise to asymmetry are treated via the infinite hierarchy of ... -
Damping dependence of the reversal time of the magnetization of single-domain ferromagnetic particles for the Neel-Brown model: Langevin dynamics simulations versus analytic results
(American Physical Society, 2010)The damping dependence of the thermally activated reversal time of the magnetization of noninteracting uniaxial single-domain ferromagnetic particles is determined using Langevin dynamics simulations and the analytic ... -
The resonance decay function method in the determination of the pre-factor of the neel relaxation time of single-domain nanoparticles
(Elsevier, 2011)In its simple form, the relaxation time of the Neel relaxation process of the magnetic moment of single-domain particles is given by ?N=?0Nexp(?), ? being the ratio of the anisotropy energy to thermal energy. The pre-factor, ... -
On Selfish and Altruistic Coalition Formation in Cognitive Radio Networks
(IEEE, 2010)We formulate the sensing-throughput tradeoff problem for distributed cognitive radio (CR) networks as a coalition formation game. Formation of coalitions enables the CRs to increase their achievable throughput, under the ... -
On Resource Reuse for Cellular Networks with Femto- and Macrocells Coexistence
(2010)This paper studies downlink resource reuse schemes for cellular networks with coexisting femtocells and macrocells. We examine two reuse schemes, termed split reuse and shared reuse. In this paper, we develop an analytical ... -
A Comparison of Channel Assignment Techniques with Power Control in Ad Hoc Networks
(2009)Multi-channel operation in an ad hoc network can improve robustness and reliability by ef?ciently managing interference and reducing contention. In this paper, we model four dynamic channel assignment techniques under the ... -
Adaptation of Reputation Management Systems to Dynamic Network Conditions in Ad Hoc Networks
(2010)Reputation management systems have been proposed as a cooperation enforcement solution in ad hoc networks. Typically, the functions of reputation management (evaluation, detection, and reaction) are carried out homogeneously ... -
The Price of Ignorance: Distributed Topology Control in Cognitive Networks
(2010)In a cognitive network, autonomous and adaptive radios select their operating parameters to achieve individual and network-wide goals. The effectiveness of these adaptations depends on the amount of knowledge about the ... -
Rendezvous for Cognitive Radios
(2011)Cognitive radios have been touted as a solution to communicating in a Dynamic Spectrum Access environment. This paper examines how cognitive radios initially find one another among the expanse of ever-changing open spectrum, ... -
The MANIAC Challenge: Exploring MANETs through Competition
(2010-05)In this paper we discuss the MANIAC Challenge, a cooperative and competitive approach to MANET networking research. Our goal was to create an opportunity for researchers to come together and compete in a MANET-based ... -
Experiences from the Iris Testbed in Dynamic Spectrum Access and Cognitive Radio Experimentation
(2010)The focus of this paper is an experimentation platform known as Iris that has a runtime reconfigurable software radio at its core. We have employed this platform to enable a wide variety of tests and experimentation in the ... -
Channel Assignment Based on Routing Decisions (CARD): Traffic-Dependent Topology Control for Multi-Channel Networks
(2009-06)Dynamic spectrum access (DSA) holds the promise for more efficient utilization of the spectrum, while requiring greater cooperation between PHY, MAC, and NET layers to allocate resources and dynamically react to changing ... -
The Me31B DEAD-Box Helicase Localizes to Postsynaptic Foci and Regulates Expression of a CaMKII Reporter mRNA in Dendrites of Drosophila Olfactory Projection Neurons.
(2010)mRNP granules at adult central synapses are postulated to regulate local mRNA translation and synapse plasticity. However, they are very poorly characterized in vivo. Here, in Drosophila olfactory synapses, we present early ... -
Throughput-Efficient Dynamic Coalition Formation in Distributed Cognitive Radio Networks
(2010)We formulate the problem of distributed throughput-efficient sensing in cognitive radio (CR) networks as a dynamic coalition formation game based on a Markovian model. The proposed coalition formation enables the CRs to ...
