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Mixed Pole Machines
ISBN: 9783659181870 / Angielski / Miękka / 312 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The idea of the mixed-pole machine is to have two electrically connected and mechanically coupled machines in one frame. The stator of this machine comprises two windings each with a different number of pole pairs, p1 and p2. Machine operation relies on the interaction between the two stator fields due to the especially designed rotor. The mixed pole machine has many applications in low cost adjustable speed drives and variable speed generators. It has also shown promise in the generating mode of operation, especially in the field of electrical generation from wind energy. This work presents...
The idea of the mixed-pole machine is to have two electrically connected and mechanically coupled machines in one frame. The stator of this machine co...
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cena:
353,37 |
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Transient Diffraction Efficiency and Switched Phase Conjugation
ISBN: 9783659185038 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Photorefarctive materials are by far the most suitable medium to generate optical phase conjugation. In particular, BaTiO3 is an attractive one among the candidates of photorefractive materials because of its large electrooptic coefficient that leads to strong coupling for two- and four-wave mixing. High phase conjugate reflectivity is always desired as well as diffraction efficiency for their different potential applications. This book contains the experimental observations of a unique enhancement of the transient diffraction efficiency and phase conjugate reflectivity with steady-state...
Photorefarctive materials are by far the most suitable medium to generate optical phase conjugation. In particular, BaTiO3 is an attractive one among ...
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cena:
219,18 |
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Dynamic Modeling and Control of VSC-based Multi-terminal DC Networks
ISBN: 9783659192463 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. In the next years, several offshore wind farms will be installed all over Europe. Due to the technologic advantages that voltage-source converters have when compared to other available options, there is a strong possibility that this will be the technology chosen to connect offshore wind farms. Such assumption intensifies the need of studying and simulating the control methods for these systems. Therefore, the purpose of this work is to present and explain all the models that are needed to simulate, with the necessary detail, the electric systems of the offshore wind farms, the high-voltage...
In the next years, several offshore wind farms will be installed all over Europe. Due to the technologic advantages that voltage-source converters hav...
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cena:
219,18 |
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Respuesta Optica No Lineal de Tercer Orden En Peliculas Organicas
ISBN: 9783659023040 / Hiszpański / Miękka / 64 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Sergio Augusto Romero Servin aborda la caracterizacion optica lineal y no lineal de tercer orden de una serie de colorantes organicos. Se abordan las consideraciones teoricas de las ecuaciones de Maxwell y se discuten dos tipos de respuestas opticas, la de tipo dipolar y la de tipo octopolar y sus implicaciones. En la caracterizacion lineal se estudia el indice de refraccion y el coeficiente de absorcion para los colorantes organicos en vias de la longitud optima para lograr la generacion del tercer armonico optico. En lo que respecta a la caracterizacion no lineal de tercer orden se emplea...
Sergio Augusto Romero Servin aborda la caracterizacion optica lineal y no lineal de tercer orden de una serie de colorantes organicos. Se abordan las ...
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cena:
129,72 |
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Estudio Comparativo de Pigmentos Empleando Colorimetria Diferencial
ISBN: 9783659031045 / Hiszpański / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. En este trabajo, se estudiaron muestras coloreadas con acuarelas de pigmentos rojo, azul, verde y amarillo a diferentes concentraciones, empleando tecnicas de colorimetria diferencial. Luego de la evaluacion y ajustes preliminares, un colorimetro Klett - Summerson modelo 800-3 y un digitalizador de imagenes HP, fueron colocados como equipos operativos para el analisis de muestras por absorcion y por reflexion, respectivamente. Se elaboro un programa computacional denominado "colorimetria" el cual fue escrito en MATLAB(r) 6.5, dicho programa contiene cuatro modulos los cuales se emplean para...
En este trabajo, se estudiaron muestras coloreadas con acuarelas de pigmentos rojo, azul, verde y amarillo a diferentes concentraciones, empleando tec...
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cena:
174,45 |
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Simulacion Holografica de Axicones Birrefringentes
ISBN: 9783659031137 / Hiszpański / Miękka / 76 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. El principal objetivo de este trabajo es simular experimentalmente, por medio de holografia, un novedoso elemento optico que consiste en dos axicones birrefringentes con el fin de explorar cambios en la profundidad focal de un sistema optico. Basicamente, una rejilla difractiva de amplitud y fase continuas, que representa al axicon, es creada a partir de una rejilla binaria por medio de tecnicas opticas como la foto-reduccion y el filtraje de frecuencias espaciales. La distribucion de amplitud compleja producida por la rejilla continua es grabada holograficamente de tal manera que en la etapa...
El principal objetivo de este trabajo es simular experimentalmente, por medio de holografia, un novedoso elemento optico que consiste en dos axicones ...
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cena:
129,72 |
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Porous Barium Titanate Ceramics
ISBN: 9783659158292 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Significant electrical resistance change due to gas and humidity absorbtion on metal oxide semiconductor surface has been known for long. Pure BaTiO3, which is an insulator at room temperature, could be made semiconductor by incorporation of low amount of donor ion oxides.The aim of the present study is to fabricate BaTiO3 with desired properties by investigating relationship between defect chemistry and characteristics. BaTiO3 based bulk ceramics were produced enhancing the porosity percentage by addition of different amounts of graphite and PMMA powders into La+3 doped BaTiO3 ceramics. For...
Significant electrical resistance change due to gas and humidity absorbtion on metal oxide semiconductor surface has been known for long. Pure BaTiO3,...
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cena:
219,18 |
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Guided Modes in Solid Dielectric Horn Antenna
ISBN: 9783659194375 / Angielski / Miękka / 112 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Here, an analytical theory has been developed for finding out the modal characteristics of a solid dielectric pyramidal horn. The dispersion characteristics have been solved numerically by varying various parameters, such as, axial length, flare angle and relative dielectric constant of the horn to investigate the modal characteristics which is crucial to include or avoid higher order modes in dielectric horn antenna design.
Here, an analytical theory has been developed for finding out the modal characteristics of a solid dielectric pyramidal horn. The dispersion character...
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cena:
219,18 |
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Electromagnetic Theory without the Lorentz Transformations
ISBN: 9783659196454 / Angielski / Miękka / 72 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. We prove as Newton's 3rd law holds in static aspects of Electromagnetism it holds also in dynamic aspects of it. Force on current-carrying wire in external magnetic field and force on magnetic needle in Oersted's experiment are action-reaction forces. By considering point magnetic charges, mutual effects of electric and magnetic charges on themselves and on each other are presented in the forms of vectorial relations. Using these relations, incorrectness of a usual manner which eventually leads to the deviation from the classical physics and to the rejection of the Galilean transformations...
We prove as Newton's 3rd law holds in static aspects of Electromagnetism it holds also in dynamic aspects of it. Force on current-carrying wire in ext...
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cena:
219,18 |
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Terahertz Plasmonic Metamaterials with Perfect Transmission
ISBN: 9783847321149 / Angielski / Miękka / 172 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book presents transmission properties in one- and two-dimensional plasmonic metamaterials with periodically and randomly structured arrays of various shaped perforated-apertures on metallic surfaces in the terahertz region. At a specific frequency at which the plasmonic metamaterials are perfectly transparent, the metal materials become essentially invisible. In the case of one-dimensional arrays of slits, Fabry-Perot like shape resonance enhances transmission of nearby horizontal surface resonance by the periodicity. Whereas in the case of two-dimensional arrays of various shaped holes,...
This book presents transmission properties in one- and two-dimensional plasmonic metamaterials with periodically and randomly structured arrays of var...
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cena:
304,16 |
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Clear-Air Modeling for Terrestrial and Satellite Communication Systems
ISBN: 9783848493470 / Angielski / Miękka / 276 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book has investigated radioclimatological study in a clear-air environment as applicable to terrestrial line of sight link design problems. Radioclimatological phenomena are adequately reviewed both for the precipitation effect and clear-air effect. The research focuses more on the clear-air effect of radioclimatological studies. Two Southern African countries chosen for case study in the report are Botswana and South Africa. To this end, radiosonde data gathered in Maun, Botswana and Durban, South Africa are used for model formulation and verification. The data used in the book ranges...
This book has investigated radioclimatological study in a clear-air environment as applicable to terrestrial line of sight link design problems. Radio...
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cena:
353,37 |
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Amorphous Semiconductors
ISBN: 9781107019348 / Angielski / Twarda / 160 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Understanding the structural unit of crystalline solids is vital in determining their optical and electronic properties. However, the disordered nature of amorphous semiconductors, where no long-range order is retained, makes it difficult to determine their structure using traditional methods. This book shows how computer modelling can be used to overcome the difficulties that arise in the atomic scale identification of amorphous semiconductors. The book explains how to generate a random structure using computer modelling, providing readers with the techniques to construct realistic material...
Understanding the structural unit of crystalline solids is vital in determining their optical and electronic properties. However, the disordered natur...
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cena:
474,94 |
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Campos Electromagneticos y Voltajes Inducidos Por Rayos En Edificios
ISBN: 9783659016844 / Hiszpański / Miękka / 128 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Los campos electromagneticos y los voltajes inducidos al interior de estructuras impactadas por rayos son una de las principales causas de dano de los equipos electronicos afectan los procesos y ponen en riesgo la seguridad de las personas. Por lo tanto, para la seleccion adecuada de las medidas de proteccion contra rayos asi como para el diseno de los sistemas de proteccion debe utilizarse una herramienta computacional suficientemente eficiente y precisa que permita evaluar los campos electromagneticos y los voltajes inducidos en diferentes zonas al interior de la estructura donde podria...
Los campos electromagneticos y los voltajes inducidos al interior de estructuras impactadas por rayos son una de las principales causas de dano de los...
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cena:
174,45 |
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Laser-Induced Reflectance Transient Gratings Method
ISBN: 9783659177262 / Angielski / Miękka / 68 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The results of theoretical and experimental studies of thermal and acoustic gratings excited at two media interface have been presented in the work. One medium is highly absorbing substance whereas another is transparent one at the spectral range of excitation and probing beams used. All the investigations have been conducted under reflecting configuration of probe beam. Aim of the work is to elaborate and experimentally implement the methods for thermal characterization and temperature remote sensing of metal and narrow band gap semiconductor surfaces, thin films as well as adjacent...
The results of theoretical and experimental studies of thermal and acoustic gratings excited at two media interface have been presented in the work. O...
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cena:
219,18 |
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Low- field microwave absorption in magnetic thin films
ISBN: 9783659197529 / Angielski / Miękka / 88 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The magnetic behavior of cubic B20 crystal structure FeSi thin film has been previously probed at macroscopic level using a magnetometer. The results revealed ferromagnetic state with significant hysteresis. This is contrary to the bulk with the same cubic B20 crystal structure that is paramagnetic. The origin of ferromagnetism in thin films in contrast to paramagnetism in the bulk is unclear and unexplained. Electron spin resonance technique (ESR) was used as a tool to characterize the magnetic behavior of FeSi thin films at microscopic level. With ESR technique, B20 crystalline FeSi show...
The magnetic behavior of cubic B20 crystal structure FeSi thin film has been previously probed at macroscopic level using a magnetometer. The results ...
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cena:
219,18 |
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Design of High Voltage Pulse Power Supply for Table Top Tokamak
ISBN: 9783659199813 / Angielski / Miękka / 76 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The most extensively investigated toroidal confinement concept is the Tokamak (Toroidal magnetic confinement). The Table Top Tokamak (TTT) is pulsed plasma device, which produces and confines plasma for few milliseconds.The objective of this Tokamak is to study basic plasma behavior under different set of conditions. Different basic plasma experiments will be carried out from the students of different universities to explore new facts and technologies in plasma science and technology field.Researches in controlled thermonuclear synthesis are actively conducted in many countries all over the...
The most extensively investigated toroidal confinement concept is the Tokamak (Toroidal magnetic confinement). The Table Top Tokamak (TTT) is pulsed p...
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cena:
219,18 |
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Investigacion de Fibras Opticas Microestructuradas Con Nanoparticulas
ISBN: 9783659034046 / Hiszpański / Miękka / 60 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. En este trabajo se presenta la investigacion experimental de las fibras LMA-16, LMA-20 y LMA-25 microestructuradas de nucleo solido rellenas de esferas de poliestireno de una micra de diametro diluidas en agua destilada y nanotubos de carbono. Se caracterizan las fibras por medio de pruebas de polarizacion, se comparan y analizan los resultados de las pruebas obtenidas al llenar las fibras. Se muestra que la polarizacion para periodos cortos de exposicion a las micro-esferas y los nanotubos no cambia, pero cambia la fase y para periodos largos de exposicion a las particulas si existe cambio...
En este trabajo se presenta la investigacion experimental de las fibras LMA-16, LMA-20 y LMA-25 microestructuradas de nucleo solido rellenas de esfera...
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cena:
129,72 |
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Polymer Nanocomposites
ISBN: 9783659164620 / Angielski / Miękka / 168 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Polymer Nanocomposites are now recognized as the most promising materials for various engineering applications. This new class of materials has shown enhanced magnetic, dielectic, thermal, optical and electrical properties. The study of polymer nanocomposites requires a multidisciplinary approach with impressive technological promise, involving novel synthesis techniques and an understanding of nanotechnology, physics, chemistry and surface science. This book incorporates the latest technical accomplishments in the area of polymer nanocomposites, focusing on their fabrication,...
Polymer Nanocomposites are now recognized as the most promising materials for various engineering applications. This new class of materials has shown ...
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cena:
304,16 |
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Experimental and theoretical study for the effect of EMW on tissues
ISBN: 9783659202223 / Angielski / Miękka / 108 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. |
cena:
219,18 |
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Three-Dimensional Shape Recovery from Image Focus
ISBN: 9783659210150 / Angielski / Miękka / 120 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Inferring three-dimensional (3D) shape of real objects from visual information belongs to the main domain of the computer vision applications. Shape From Focus (SFF) is one of the passive methods that uses focus as a cue to infer the 3D structure of the object. In SFF, the objective is to find out the depth by measuring the distance of well-focused position of each object point from the camera lens. A sequence of images is acquired either by displacing the object in small steps or by changing the focal length of the lens in the camera. First, a focus measure, which is a criterion that can...
Inferring three-dimensional (3D) shape of real objects from visual information belongs to the main domain of the computer vision applications. Shape F...
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cena:
219,18 |
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