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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:
221,75 |
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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:
90,06 |
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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:
221,75 |
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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:
221,75 |
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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:
357,51 |
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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:
392,44 |
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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:
503,06 |
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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:
221,75 |
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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:
307,73 |
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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:
357,51 |
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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:
267,00 |
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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:
267,00 |
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Multiple Domain Basis Functions and Other Recent Advances in Mom
ISBN: 9783838361338 / Angielski / Miękka / 268 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The work discusses several extentions to the method of moments (MoM), considered in the context of electromagnetics. The topics include the interpolating multiple domain basis functions (MDBF), and improvement to the condition number of the impedance matrix. The main focus in the work is on a realization of the novel composite multiple domain basis functions (MDBF), enabling an efficient treatment for curved structures, which is backward compatible with most of the existing MoM codes. The MDBF is a profiled linear combination of common basis functions (BF), such as piecewise linear...
The work discusses several extentions to the method of moments (MoM), considered in the context of electromagnetics. The topics include the interpo...
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cena:
357,51 |
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Effect of Induction on Capacitor Bank Protection Schemes
ISBN: 9783843350884 / Angielski / Miękka / 84 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Overall, capacitors have many applications in power systems: they can be used in series to compensate the inductance of transmission lines to transmit more power. They can also be used as surge capacitors, starting motors, and SVC. Capacitor banks installed in power substations are vital in the sense that they provide the reactive power needed for the power system, which in turn improves the voltage profile of the system. There is always the option of grounding the banks or leaving them ungrounded. Each of the above configurations has its own advantages and disadvantages; to name a...
Overall, capacitors have many applications in power systems: they can be used in series to compensate the inductance of transmission lines to transm...
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cena:
218,74 |
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Ferrite Nanoparticles
ISBN: 9783838362243 / Angielski / Miękka / 132 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Synthesis of advanced materials as nanopartciles is currently gaining widespread interest in material processing technology. Cobalt ferrite nanoparticles attract great research interests due to their potential application in ferrofluids, data storage, absorbing materials, magnetic fluids, magnetic recording media and magnetic resonance imaging. The structural stability of the cobalt ferrite nanoparticles is essential in all technical applications. In order to achieve highly homogeneous cobalt ferrite nanoparticles and to avoid using the milling process, various techniques, such as...
Synthesis of advanced materials as nanopartciles is currently gaining widespread interest in material processing technology. Cobalt ferrite nanopart...
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cena:
267,00 |
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Tunable Microcavities in Photonic Bandgap Yarns and Optical Fibers
ISBN: 9783843361644 / Angielski / Miękka / 148 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The vision behind this work is the fabrication of high performance innovative fiber-based optical components over kilometer length-scales. Their optical properties derive from their multilayer dielectric photonic band-gap structure that exhibits omnidirectional reflectivity. The theoretical tools needed to design, analyze and optimize such structures are introduced. We show that defect layers in these otherwise periodic structures act as micro-cavities that enable precise design of the fibers spectral response. Two structures are explored: fibers for external reflection and hollow-...
The vision behind this work is the fabrication of high performance innovative fiber-based optical components over kilometer length-scales. Their op...
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cena:
267,00 |
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A low frequency of induction heating for continues welded rails
ISBN: 9783843364614 / Angielski / Miękka / 124 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. The main objective of the dissertation was to analyze theoretically and confirm experimentally possibility of employment of a low frequency induction heating for continuous welded rails (CWR) under track laying. Therefore, the thesis of the dissertation has been formulated as below: The low frequency induction heating (50Hz-450Hz) can be successfully used for continuous welded rails under track laying provided it is properly selected and controlled.
The main objective of the dissertation was to analyze theoretically and confirm experimentally possibility of employment of a low frequency induction ...
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cena:
267,00 |
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Metamaterials in a Mobile Phone
ISBN: 9783844306071 / Angielski / Miękka / 116 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This thesis focuses on the use of metamaterials in mobile phone devices in order to improve antenna performances, e.g. to investigate if they can reduce the peak of SAR in the human head. The purpose is to present metamaterials in a general way as many researches do not provide general background and knowledge, and focus on very specific uses and topics. As many researches focus on the use of metamaterials with antennas, the second objective is to analyze if they could possibly improve the performances of antennas. Thanks to FDTD simulations, several configurations have been investigated. The...
This thesis focuses on the use of metamaterials in mobile phone devices in order to improve antenna performances, e.g. to investigate if they can redu...
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cena:
221,75 |
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Modelling Hyperfine Interaction
ISBN: 9783844317848 / Angielski / Miękka / 80 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. Computer simulations have become an important part of spectroscopic studies. Not only do they help experimenters analyse results, they are also important for data collection and information management. The use of computer simulation becomes especially important in the study of hyperfine interactions within atoms and ions where there are many levels to be managed. The study of hyperfine splitting is of special importance in Astrophysics and Stellar Spectroscopy. Consequently, the classification of hyperfine structures with atomic and ionic energy levels is of crucial importance. The motivation...
Computer simulations have become an important part of spectroscopic studies. Not only do they help experimenters analyse results, they are also import...
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cena:
221,75 |
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Diluted Magnetic Semiconductors
ISBN: 9789810201760 / Angielski / Twarda / 672 str. Termin realizacji zamówienia: ok. 5-8 dni roboczych. This review volume presents both basic and applied aspects of diluted magnetic semiconductors (DMS). The term DMS applies generally to semiconductors in which a fraction of its constituent ions are replaced by magnetic ions. This book is only the second to review DMS materials. It presents a detailed treatment of the current state of knowledge of the established properties of DMS in the form of single crystals, quantum wells and superlattices. It also brings together recent work on new DMS materials and presents discussions on a wide range of possible DMS applications. This review volume presents both basic and applied aspects of diluted magnetic semiconductors (DMS). The term DMS applies generally to semiconducto... |
cena:
1068,03 |
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