Relay Models
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. A Wideband and Wide Axial Ratio Bandwidth Circularly Polarized Antenna Loaded with Circular Ring Slot
Abstract The presented model for wideband circularly polarized microstrip antenna is an improved version of the previous models which is widely applicable to satellite, microwave relay and radar. The designed circularly polarized antenna having overall volume of 20× 20 × 1.6 mm3 actively works at the impedance bandwidth of 9000 MHz (4.0–12.9 GHz) having
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Desenvolvimento de dobras e falhas em ambiente distensional: Aplicação da modelagem física
The geological modeling allows, at laboratory scaling, the simulation of the geometric and kinematic evolution of geological structures. The importance of the knowledge of these structures grows when we consider their role in the creation of traps or conduits to oil and water. In the present work we simulated the formation of folds and faults in extensional
Publicado em: 2010
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3. Modelagem e analise dinamica de sistemas de proteção de redes de distribuição de energia eletrica na presença de geradores sincronos / Modeling and dynamic analysis of distribution network protection systems in the presence of synchronous generators
Recently, the need for the development of protection device dynamic models for analysis of distribution network protection systems has increased due to the usage of distributed generators. Therefore, the objective of this dissertation is to develop a dynamic model library torepresent the main relays used in the subtransmission and distribution network protec
Publicado em: 2007
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4. Modeling and dynamic analysis of distribution network protection systems in the presence of synchronous generators / Modelagem e analise dinamica de sistemas de proteção de redes de distribuição de energia eletrica na presença de geradores sincronos
Recently, the need for the development of protection device dynamic models for analysis of distribution network protection systems has increased due to the usage of distributed generators. Therefore, the objective of this dissertation is to develop a dynamic model library torepresent the main relays used in the subtransmission and distribution network protec
Publicado em: 2007
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5. Sustaibability in a structure of integrated systems / Sustentabilidade em uma estrutura de sistemas integrados
Decisions related to the sustainable development involve the following: what to sustain and how to sustain. In general, these decisions are based on assumptions about the permanence of certain characteristics of the systems involved, be them natural or socio-economic. Moreover, these decisions can be only of ethical character or may involve formulations that
Publicado em: 2005
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6. EFFECTS OF ATMOSPHERIC MULTIPATH IN LINE-OF -SIGHT MICROWAVE SYSTEMS / EFEITOS DE MULTIPERCURSOS ATMOSFÉRICOS EM ENLACES DE MICROONDAS EM VISIBILIDADE
The variations which happen in the troposphere layers throughout the time in relation to the median condition of the signal cause various phenomena that change the received signal level at digital radio relay systems randomly. The random changes are named fading. Fading is normally classified as fast or slow. The former is normally associated with the atmosp
Publicado em: 2004
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7. Molecular orbital studies of enzyme activity: I: Charge relay system and tetrahedral intermediate in acylation of serine proteinases.
The charge relay ststem and its role in the acylation of serine proteinases is studied using the partial retention of diatomic differential overlap (PRDDO) technique to perform approximate ab initio molecular orbital calculations on a model of the enzyme-substrate complex. The aspartate in the charge relay system is seen to act as the ultimate proton accepto
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8. Proton shuttle in green fluorescent protein studied by dynamic simulations
As a direct simulation of a multistep proton transfer reaction involving protein residues, the proton relay shuttle between A and I forms of green fluorescent protein (GFP) is simulated in atomic detail by using a special molecular dynamics simulation technique. Electronic excitation of neutral chromophore in wild-type GFP is generally followed by excited-st
The National Academy of Sciences.
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9. Ionic mechanisms for intrinsic slow oscillations in thalamic relay neurons.
The oscillatory properties of single thalamocortical neurons were investigated by using a Hodgkin-Huxley-like model that included Ca2+ diffusion, the low-threshold Ca2+ current (lT) and the hyperpolarization-activated inward current (lh). lh was modeled by double activation kinetics regulated by intracellular Ca2+. The model exhibited waxing and waning oscil
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10. Smelling the difference: controversial ideas in insect olfaction
In animals, the sense of smell is often used as a powerful way to attract potential mates, to find food and to explore the environment. Different animals evolved different systems to detect volatile odorants, tuned to the specific needs of each species. Vertebrates and nematodes have been used extensively as models to study the mechanisms of olfaction: t
Company of Biologists.
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11. Accuracy of DNA polymerase-alpha in copying natural DNA.
The fidelity of DNA polymerase-alpha from calf thymus (9S enzyme) in copying bacteriophage phi174am16 DNA in vitro has been determined from the frequency of production of different revertants. In the self-priming reaction we were able to measure the frequencies of base pairing mismatches during the course of replication on biasing the ratios of deoxynucleosi
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12. Computer-Aided Resolution of an Experimental Paradox in Bacterial Chemotaxis
Escherichia coli responds to its environment by means of a network of intracellular reactions which process signals from membrane-bound receptors and relay them to the flagellar motors. Although characterization of the reactions in the chemotaxis signaling pathway is sufficiently complete to construct computer simulations that predict the phenotypes of mutan
American Society for Microbiology.