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Development and Evaluation of Novel FDTD Methods
ISBN: 9783838339016 / Angielski / Miękka / 188 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. |
cena:
304,16 |
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Microwave Imaging of Biological Structures
ISBN: 9783838368061 / Angielski / Miękka / 144 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Over the past several years, microwave imaging has grown as a promising technique for the imaging of biological structures. Thanks to the high sensitivity, simplicity, low cost and the use of non-ionizing radiations, it seems to be a valid complement to the more traditional techniques, such as radiography, magnetic resonance and ultrasound. In this work, the capability of the microwave imaging technique to detect early stage breast cancer and lesions of the knee (in particular meniscal tears and lesions of the tendons) is analysed. For both the applications, a preliminary numerical study is...
Over the past several years, microwave imaging has grown as a promising technique for the imaging of biological structures. Thanks to the high sensiti...
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cena:
263,91 |
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Electromagnetic Modeling with Wave Tilt and Reflection Coefficient
ISBN: 9783838377421 / Angielski / Miękka / 380 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This work aims at formulating models based on the Maxwell equations, using earth parameters such as conductivity, permeability, permittivity and surface wave impedance. Three measurable field parameters; Amplitude of the correction factor to the wave tilt, Q; phase of Q, and reflection coefficient were calculated from the model with various conductivity contrasts over a layered media. Two cases of a top layer overlying a more resistive basement and a conductive top layer overlying a resistive basement were considered with a radio frequency of 125kHz and a VLF of 20kHz, which are within the...
This work aims at formulating models based on the Maxwell equations, using earth parameters such as conductivity, permeability, permittivity and surfa...
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cena:
353,37 |
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A New Approach for Wire Antennas Design
ISBN: 9783838341538 / Angielski / Miękka / 272 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Nowadays, Navy ship decks are more and more 'crowded' with antennas. Often, in the design stage, brass scale models are used by the Navies of many countries to evaluate radiators' impedances and their layout. This approach may suffer from inaccuracies due to scalability and can be quite time consuming and costly. A possible different approach is the one pursued in this work, where accurate modeling of radiators (wires, loaded wires, loaded wires on ground planes, etc.) has been combined with efficient global optimization techniques. As bees in a swarm looking for the best flower, global...
Nowadays, Navy ship decks are more and more 'crowded' with antennas. Often, in the design stage, brass scale models are used by the Navies of many cou...
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cena:
353,37 |
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Advanced Optimization Techniques in Electromagnetics
ISBN: 9783838373263 / Angielski / Miękka / 224 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This work is relevant to the electromagnetic area. Two advanced optimization techniques have been developed and applied to solve problems in both antennas and space applications fields. In the former case a Genetic Algorithm (GA) has been used to optimize high-impedance surfaces aimed to improve antennas performance. In the second application, an ad-hoc Particle Swarm Optimization (PSO) has been implemented to solve multiple dipole modelling problems for spacecraft magnetostatic cleanliness design drivers.
This work is relevant to the electromagnetic area. Two advanced optimization techniques have been developed and applied to solve problems in both ante...
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cena:
353,37 |
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Numerical Methods for Simulation of Diffusion and Wave Propagation
ISBN: 9783838387314 / Angielski / Miękka / 140 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Development of numerical methods to solve partial differential equations is extremely important as most of the real life physical systems can be formulated in the form of these. By solving partial differential equations, the characteristics of a physical system can be simulated even without performing laboratory experiments. This book discusses the development of few efficient numerical tools to solve diffusion and wave equation. Methods for treating diffusion of atoms, molecules, ions and charge carriers in solid state and optoelectronic structures are presented. Additionally, split-step...
Development of numerical methods to solve partial differential equations is extremely important as most of the real life physical systems can be formu...
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cena:
263,91 |
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PROPAGATION OF SEVEN NEW SH-SAWs IN PIEZOELECTROMAGNETICS OF CLASS 6mm
ISBN: 9783843364034 / Angielski / Miękka / 84 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This book addresses to theoretical investigations of shear-horizontal surface acoustic waves (SH-SAWs) propagating in composites of class 6 mm which can possess piezoelectric and piezomagnetic phases. Applying different electrical and magnetic boundary conditions in the theoretical treatments, wave characteristics of seven new SH-SAWs are obtained in explicit forms. It was found that the new SH-SAWs can have both piezoelectric and piezomagnetic properties. Also, the analytically obtained exact formulae for the new SH-SAW velocities can demonstrate dependencies on the squared speed of light in...
This book addresses to theoretical investigations of shear-horizontal surface acoustic waves (SH-SAWs) propagating in composites of class 6 mm which c...
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cena:
219,18 |
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Validation of Remotely Sensed Soil Moisture Observations
ISBN: 9783843358187 / Angielski / Miękka / 208 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Soil moisture controls the physical processes that exchange mass and energy between the atmosphere and the land surface in the hydrologic cycle.Improved observations of soil moisture may lead to improvements in weather forecasting,seasonal climate prediction,and our understanding of the physical,chemical and biological processes that occur within the soil.Recent advances in remote sensing have shown that microwave radiometry is a suitable approach to retrieve soil moisture.However,the quantitative aspects of remotely sensed soil moisture observations are not well-known,and...
Soil moisture controls the physical processes that exchange mass and energy between the atmosphere and the land surface in the hydrologic cycle.Impr...
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353,37 |
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Dispersive Saws in Layered Systems Consisting of Cubic Piezoelectrics
ISBN: 9783843375238 / Angielski / Miękka / 72 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This work studies propagation of different SH-SAWs treating various configurations using the cubic crystals Bi12SiO20 and Bi12GeO20, which possess strong piezoelectric effect. Possible cuts for the wave propagation are treated when an even-order symmetry axis of a crystal is perpendicular to the sagittal plane, and when some analytical solutions can be obtained studying propagation direction [101] in the crystals. Calculations of the phase velocity and the CEMC versus the layer thickness were carried out. Numerical results on propagation of the seven-partial Love type waves were also...
This work studies propagation of different SH-SAWs treating various configurations using the cubic crystals Bi12SiO20 and Bi12GeO20, which possess str...
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cena:
219,18 |
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The Dipole Radiation
ISBN: 9783844307566 / Angielski / Miękka / 80 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The theory of physical phenomena called "the dipole radiation" is full of surprises. The book starts with one of them. Let a particle does not produce any electric or magnetic field due to lack of charge and dipole moment, but at some moment of time $t=0$, it polarizes and since this moment on, produces a stationary dipole field. Due to the causality principle, the filed is cut at the distance $ct$. Then its lines of force have endpoints which signify presence of electric charge. On one hand, this picture follows straightforwardly from the theory of retarded potentials, on the...
The theory of physical phenomena called "the dipole radiation" is full of surprises. The book starts with one of them. Let a particle does not produ...
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cena:
89,01 |
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Atmospheric Profiling by GPS Radio Occultation
ISBN: 9783844308716 / Angielski / Miękka / 80 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. GPS RO is a global sounding technique providing atmospheric profiles useful for numerical weather prediction and climate studies. The system sounds the Earth's atmosphere evaluating the delay affecting the passing radio signal. Such a delay is processed to retrieve profiles of refractivity at global scale, and subsequently temperature, pressure and humidity. In the lower atmosphere the classical retrieval schemes need of additional information, e.g. of the knowledge of temperature from independent observations at each GPS occultation. This book proposes a method based on neural networks to...
GPS RO is a global sounding technique providing atmospheric profiles useful for numerical weather prediction and climate studies. The system sounds th...
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cena:
219,18 |
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Mutual Coupling in Patch Antennas
ISBN: 9783844309324 / Angielski / Miękka / 84 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. With the drive towards better and faster communication systems, wireless communications has assumed a new significance in todays world. In this context, it becomes all the more important to increase the efficiency of the antennas involved with these systems. Patch antennas are used because of their popularity arising from their adaptability and unobtrusive nature. Here we have tried to look at an optimum design for a patch antenna and also the best possible feed network for the same which would enhance its radiation properties as has been shown through the results obtained here. Furthermore,...
With the drive towards better and faster communication systems, wireless communications has assumed a new significance in todays world. In this contex...
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cena:
219,18 |
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Gigabit Wireless at 60 GHz
ISBN: 9783838335025 / Angielski / Miękka / 228 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The world-wide availability of the huge amount of license-free spectral space in the 60 GHz band provides wide room for Gb/s wireless applications. A commercial (read: low-cost) 60-GHz transceiver will, however, provide limited system performance due to the stringent link budget and the substantial RF imperfections. This book comprises research into the characteristics of typical 60-GHz channels, the influence of directional antenna patterns, the evaluation of the wideband transmission quality as well as the development of suitable baseband algorithms in the context of 60-GHz radios. A...
The world-wide availability of the huge amount of license-free spectral space in the 60 GHz band provides wide room for Gb/s wireless applications. A ...
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cena:
353,37 |
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Electromagnetic Wave Propagation in Turbulence : Evaluation and Application of Meliin Transforms
ISBN: 9780819467287 / Angielski Termin realizacji zamówienia: ok. 5-8 dni roboczych. At first glance, Mellin transforms can look formidable and complicated. With this book, Dr. Richard Sasiela invites readers to overcome these fears and see just how useful they can be. The book is aimed at two audiences: those interested in problems surrounding electromagnetic wave propagation in turbulence, and those interested in evaluating integrals. The author takes a systematic and in-depth approach to answering both audiences, separately and jointly, by demonstrating a way to obtain analytic answers, the integration method, and by developing a way to express solutions to electromagnetic...
At first glance, Mellin transforms can look formidable and complicated. With this book, Dr. Richard Sasiela invites readers to overcome these fears an...
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cena:
396,71 |
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A Handbook for EMC Testing and Measurement
ISBN: 9780863417566 / Angielski / Miękka / 304 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. During the 1980s, the worldwide interest in electromagnetic compatibility (EMC) grew rapidly with the introduction of legislation to control the growing interference problems generated by the increased use of electronic equipment in industry and in the home. The European directive harmonizing EMC measurements gave particular impetus to manufacturers and importers of electrical and electronic equipment in Europe to understand EMC design techniques and verification procedures. This book explains how equipment can be verified by testing. It discusses the nature of EMC standards world wide and...
During the 1980s, the worldwide interest in electromagnetic compatibility (EMC) grew rapidly with the introduction of legislation to control the growi...
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cena:
490,09 |
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Bi2Sr2CaCu2O8+x React Wind Sinter Experiments
ISBN: 9783838300269 / Angielski / Miękka / 64 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Manufacturing solenoids from Ag-clad Bi2Sr2CaCu2O8+x (Bi2212) conductors is complicated by the difficult thermo-mechanical processing. The two approaches usually used for winding coils are React-and-Wind (R&W) and Wind-and-React (W&R). React Wind Sinter (RWS) presents two alternative approaches that avoid the pitfalls of R&W and W&R. In the first RWS approach, the conductor is taken through the partial melt stage of the heat treatment, cooled to room temperature, and wound into its final coil form. It is then taken through growth and sinter steps to complete the heat treatment and heal...
Manufacturing solenoids from Ag-clad Bi2Sr2CaCu2O8+x (Bi2212) conductors is complicated by the difficult thermo-mechanical processing. The two approac...
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cena:
219,18 |
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Analysis and Modeling of High-Impedance Surfaces
ISBN: 9783838365893 / Angielski / Miękka / 168 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The thesis deals with the analysis and modeling of high-impedance surfaces. High-impedance surfaces are resonant cavities synthesized by printing a periodic frequency selective surface on the top of a grounded dielectric slab. The first part of the thesis is dedicated to the modeling of high-impedance surfaces and frequency selective surfaces which constitute the key element of the HIS structures. High-impedance surfaces are then analyzed when employed in the design of low-profile antennas and ultra-thin electromagnetic absorbers. The last part of the thesis deals with the so-called...
The thesis deals with the analysis and modeling of high-impedance surfaces. High-impedance surfaces are resonant cavities synthesized by printing a pe...
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cena:
304,16 |
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PIC Simulations of Ultrashort-Pulse Laser Solid-Target Interactions
ISBN: 9783838342047 / Angielski / Miękka / 216 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The book is based on a theoretical study of short-pulse laser interactions with solid targets and related phenomena. Relativistic electromagnetic code based on the Particle-in-Cell method is utilized to describe laser interaction with target and subsequent transport of fast charged particles in plasma. The code is one-dimensional in space and three-dimensional in velocity and it is improved here by incorporating ionization physics and revision of binary collisional algorithm. The theories of collisional ionization, electric field ionization and elastic collisions in plasma are reviewed and...
The book is based on a theoretical study of short-pulse laser interactions with solid targets and related phenomena. Relativistic electromagnetic code...
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cena:
353,37 |
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Light Propagation in Ultracold Atomic Gases
ISBN: 9783838372662 / Angielski / Miękka / 140 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Laser and atomic gases allow to study radiation-matter interaction at its fundamental level. After the development of laser sources, atomic gases have been successfully used to study non-linear processes. Later on, light has been demonstrated as a very powerful tool not only to study atoms but also to manipulate them. The achievement of ultracold gases (1997 and 2001 Nobel prizes) is the most remarkable among many. Starting from an optical point of view, we theoretically investigate the features of ultracold atomic gases as an extremely dispersive and tunable medium. We first discuss the...
Laser and atomic gases allow to study radiation-matter interaction at its fundamental level. After the development of laser sources, atomic gases have...
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cena:
263,91 |
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The Dark Hollow Gaussian Laser Beams in Aberrated Optical Systems
ISBN: 9783838393179 / Angielski / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. We derived the radial intensity distribution of the HGB analytical based on Collins integral for aberration-free lens by two methods one of them is new "in the best of our knowledge." A numerical solution of a two dimensional generalized Collins diffraction integral equation for a HGB propagating through an apertured paraxial ABCD optical system is derived and investigated. The properties of the radial intensity distribution, dark spot size DSS and width-radius ratio WRR parameters of the HGB throughout the geometrical focal plane are studied and an optimum value for each is calculated. And...
We derived the radial intensity distribution of the HGB analytical based on Collins integral for aberration-free lens by two methods one of them is ne...
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cena:
263,91 |
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