für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray As electronics get increasingly small it becomes critically important to control processes and interactions on the level of single electrons and holes. Ultimately, future generations of electronics may store information in the spins of single confined electrons and holes. Quantum dots provide an ideal material for locally confining these single charges. To control interactions between spins in separate quantum dots, the dots will need to be located close to one another and the coupling between the dots must be turned on and off in situ. Vertically stacked quantum dots provide an ideal test bed for studying these interactions because molecular beam epitaxy techniques allow for precise control over the dimensions and spatial proximity of the dots. Ultimately, however, it will be impossible to access individual QDs in a vertically stacked column. Laterally ordered dots will enable the deposition of electrical gates that can individually control each dot and the coupling between them. In this book we are looking at the fundamental mechanisms of coupling between laterally ordered dots and how the coupling depends on material structure. ····· 10361114853
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with the study of quantum communication protocols with Continuous Variable (CV) systems. Continuous Variable systems are those described by canonical conjugated coordinates x and p endowed with infinite dimensional Hilbert spaces, thus involving a complex mathematical structure. A special class of CV states, are the so-called Gaussian states. With them, it has been possible to implement certain quantum tasks as quantum teleportation, quantum cryptography and quantum computation with fantastic experimental success. The importance of Gaussian states is two- fold firstly, its structural mathematical description makes them much more amenable than any other CV system. Secondly, its production, manipulation and detection with current optical technology can be done with a very high degree of accuracy and control. Nevertheless, it is known that in spite of their exceptional role within the space of all Continuous Variable states, in fact, Gaussian states are not always the best candidates to perform quantum information tasks. Thus non-Gaussian states emerge as potentially good candidates for communication and computation purposes. ····· 10361114789
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Recently an increased amount of research work has been focused on negative refractive index mediums or Metamaterials. Hence, this book is aimed at presenting the possible applications of plasma as a medium for negative/positive refraction of electromagnetic waves. In the reference of composite metamaterials, this book brings models to achieve negative refraction using plasma. In another approach, study is conducted on hybrid plasma photonic crystal, which reveals that positive and negative refraction can be achieved by switching ON and OFF the plasma. Therefore, this book invokes the concept that plasma can be used to enhance the tunability/controllability of composite metamaterials and photonic crystals. ····· 10361114659
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray 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 for this work was the ongoing research in hyperfine spectroscopy at University of Karachi. The aim of the simulation was to help the researchers model hyperfine splittings under different parameters and their classification. It also provides efficient method for managing classification data and information of energy level. ····· 10361114634
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray THE PRACTICAL KNOWLEDGE OF THE STUDENTS IS VERY ESSENTIAL AS THEORY AND EXPERIMENTS IN ENGINEERING AND TECHNOLOGY GO HAND IN HAND. THE BOOK IS WRITTEN IN A SIMPLE AND LUCID LANGUAGE WITH A GREAT EMPHASIS ON THE EXPERIMENTAL RATHER THAN THE THEORETICAL ASPECT TO EACH EXPERIMENT. OF COURSE, THE THEORY AND THE PRINCIPLE OF EACH EXPERIMENT NECESSARY FOR ITS SUCCESSFUL PERFORMANCE HAS BEEN DULY DESCRIBED AND DISCUSSED. A BRIEF DESCRIPTION OF THE ASSEMBLAGE OF THE ACTUAL APPARATUS ALONG WITH THEIR ACCESSORIES HAS BEEN GIVEN WITH SELF EXPLANATORY OBSERVATION TABLE WHICH ALSO ILLUSTRATE THE SEQUENCE OF METHOD AND OTHER IN WHICH STUDENT HAS TO RECORD THEIR OBSERVATIONS IN A PROPER SCIENTIFIC MANNER. THE VARIOUS PRECAUTIONS WHICH ARE TO BE FOLLOWED BY THE STUDENTS DURING THE PERFOEMANCE OF EXPERIMENT ARE GIVEN IN SIMPLE LANGUAGE. A SPECIAL FEATURE OF THE BOOK IS THAT AT THE END OF EACH EXPERIMENT A SERIES OF QUESTIONS WITH THEIR ANSWERS BASED ON INSTRUMENTATION AND THEORETICAL ASPECT FOR PROPER UNDERSTANDING OF THE EXPERIMENT ARE GIVEN ····· 10361114568
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray X-ray observations of active galactic nuclei and black-hole binaries offer a unique laboratory for testing general relativity in the strong-gravity regime, for studying accretion physics around black holes, and for constraining properties of accreting black holes. This book represents the author`s Doctoral Thesis. It contains a brief introduction to the black-hole physics and X-ray astronomy as well as the original scientific results. A special attention is focused on black hole spin measurements employing the relativistic iron line profiles in the X-ray domain. ····· 10361114561
für 59.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this work we give an introduction to automorphic forms in string theory by examining a well-known case in ten-dimensional Type IIB superstring theory. An automorphic form, constructed as a non-holomorphic Eisenstein series, is known to encode all perturbative and non-perturbative quantum corrections in the genus expansion for the R^4-term included in the asymptotic string expansion for the effective action. Furthermore, we study Type IIA superstring theory compactified on a rigid Calabi-Yau threefold. Here a discrete group, the Picard modular group, is believed to be a preserved symmetry of the quantum theory, and an automorphic form is conjectured to encode the quantum corrections to the metric of the hypermultiplet moduli space, which classically is a coset space. To read off the loop corrections arising from the string coupling, as well as the non- perturbative instanton corrections, we rewrite the Eisenstein series as a Fourier series. The Fourier series is decomposed into a constant, abelian and non-abelian part. The main complication arises when trying to identify the coefficients in the non- abelian part. We try to bring some clarity to this issue. ····· 10361114546
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A new 14.5 GHz all permanent magnet ECR ion source has been developed and investigated at the Institut für Allgemeine Physik, Vienna University of Technology. A new experimental setup for the measurement of total single electron capture cross sections has been designed, simulated and used for some collision experiment. Measurements of resonance charge exchange (single electron capture) cross sections for Ar+-Ar and Ne+- Ne collisions at low impact energy (0.1 1 keV) have been carried out in order to test the reliability and accuracy of the new apparatus, since accurate calculated and measured data for the respective cross sections are readily available from the literature. Our data were found in good agreement with earlier published data in this energy range. ····· 10361114532
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The present work aims, primarily, at studying the problem of two bodies with varying mass which has important practical and astrophysical applications. The ejection of mass from any body depends on many parameters, amongst the most important of which are the central condensation (which means, more or less, the degree of rigidity of the body) and the velocity of rotation which provides the external layers with the angular momentum that activates the process of ejection of mass.The procedure followed is developed in the Hamiltonian framework, and is expressed explicitly in terms of the coordinates using Lie series. ····· 10361114442
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In order to further our understanding of the instabilities which develop in numerical relativity codes, I study vacuum solutions of the cosmological type (T^3 topology). Specifically, I focus on the 3+1 ADM formulation of Einsteins equations. This involves testing the numerical code using the following non-trivial periodic solutions, Kasner, Gowdy, Bondi and non-linear gauge waves. I look for constraint violating and gauge mode instabilities as well as numerical effects such as convergence, dissipation and dispersion. I will discuss techniques developed to investigate the stability properties of the numerical code. ····· 10361114309
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book studies the evolution of scalar cosmological perturbations in the 1+3 Covariant Gauge-Invariant formalism for generic f(R) theories of gravity. It provides with a complete set of equations describing the evolution of matter and curvature fluctuations for a multi-fluid cosmological medium. It also deals with a specific model of a radiation-dust fluid universe described by barotropic equations of state where the perturbation equations are applied around a background solution of a specific toy model of gravity and looks at exact solutions for scales much smaller and much larger than the Hubble radius. ····· 10361114269
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The aim of this book was to develop an effective system to improve the sound transmission loss of lightweight partition walls. Effective in this context means that the system would be lightweight, economical,and readily installed with current site practice. The accepted wisdom in the area of sound reduction is to drape the entire area of the partition with a sound absorbing membrane material and the work of this book proceeded on this premise. However during the course of the experiments it was found that the assembly detail at the stud had a much more significant effect than the membrane material on sound reduction. It transpired that the main effect of the membrane material was to provide damping under the screws at the stud and if the material was compressed too much the damping was compromised. The book reports on the introduction of a new sacrificial layer which, when incorporated into the stud assembly allows the full damping effect of the membrane material to manifest itself.The book therefore proposes a strip or wad consisting of layers of membrane material and sacrificial layer to be mounted on the stud prior to the plasterboard. ····· 10361114253
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents the physical, optical and microwave properties of the Bi1.5Zn1.0Nb1.5O7 and Bi2Zn2/3Nb4/3O7 ceramics and thin films in the Bi2O3-ZnO-Nb2O5 based pyrochlore system. The increasing demand for the microwave dielectric materials with improved properties suitable for modern integrated circuits was the major motivation for investigating these ceramics materials both in bulk and thin film forms. Bismuth zinc niobate based pyrochlore ceramics and thin films are being considered for many applications ranging from ceramic capacitors to frequency agile microwave devices. So this presents the study of the BZN ceramics and thin films in an inter disciplinary perspective which include aspects of physics, material science and microwave engineering. ····· 10361114220
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Liquid Crystals are partially ordered system without a rigid, long ranged structure, are beautiful and mysterious. In symmetry and structure, they are intermediate between the solid crystalline state and isotropic liquid state. The study of liquid crystalline materials covers a wide area: chemical structure, physical properties and technical applications. Due to their dual nature anisotropic physical properties of solids and rheological properties and easy response to external perturbations (electric field, magnetic field etc.), liquid crystals are of greatest potential of scientific and technological applications. The subject of liquid crystal, in its experimental aspect, has come of age and has achieved the status of being a very exciting interdisciplinary field of scientific and industrial research. However, theoretical understanding falls far behind and is awaited to answer many basic questions. In the present monograph we addressed some of these problems within the framework of Landau de Gennes formulation and by using the unified molecular theory based on weighted density functional approach. ····· 10361114111
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray SWNTs are potential materials for future nanoelectronics. Since the electronic and optical properties of SWNTs strongly depend on their diameter and chiral angle, the selective synthesis of SWNTs with desired chiralities is one of the major challenges in nanotube science and applications. Here, we demonstrated a selective growth of (6,5) rich SWNTs from the Au catalyst. Electrical characteristics of thin films consisting of SWNTs produced under the different combinations of catalyst types and CVD methods are also investigated, which indicated the SWNTs grown from the nonmagnetic catalyst with PCVD showed the best device performance. The Au synthesized SWNTs displayed ferromagnetic features, which is believed it belongs to the intrinsic SWNTs properties. These nonmagnetic synthesized SWNTs can be useful for the fundamental study of the intrinsic magnetic properties and the chirality dependence of magnetism in the SWNTs. Also these ferromagnetic SWNTs without including toxic nanoparticles such as iron group catalysts can be used for the medical applications. ····· 10361114064
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In present book: Relativity replaced - Ether found around Earth ,the reader will be confronted with the most serious and unanswered problems of Einstein`s Relativity Theories thus the reader will see:(1)The numerous reasons why these theories have to be excluded entirely from Physics,(2)It explains entire the phenomenology of both Special and General Relativity Theories without any need of introduction of these Einstein`s theories,and (3)It reveals theoretically and experimentally the existence of Stokes`(1845) luminiferous ether found around Earth. The student of Physics can easily prove the existense of (gravitational) `Black-Holes` in the chapter of `Improved Newtonian Gravity` Additionally the book proves that we may live in a Stationary Non-Expanding Universe which due of some friction, -by the existent ether- on the travelling photon (along in the cosmic distances of galaxies), it has an effect to create a `tired photon` and thus the photon losses a part of its original energy this has erroneously been interpreted, by astronomers and cosmologists, as a Doppler - red shift from an ...`Expanding Universe` A.N.A. ····· 10361113991
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray With the drive towards better and faster communication systems, wireless communications has assumed a new significance in today`s 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, the mutual coupling between antennae in a 2 x 2 array when the antennae are linearly, non-linearly and circularly polarized is studied and compared. During this process, the frequency variation produced is also noted. The data from the variation of the mutual coupling between adjacent antennae and the resonant frequency of the antennae themselves, its dependence on polarization, feed direction and distance can be used in designing an array. ····· 10361113825
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray 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 retrieve atmospheric profiles from RO refractivity. Once trained, the neural networks provide a suited transfer function able to obtain atmospheric profiles overcoming the requirement for additional information at each GPS occultation. The analysis should be useful to shed some light on GPS RO data at different stages and to develop smart and simple retrieval algorithms handling tricky data sets ····· 10361113765
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The increasing interest in tungsten and tungsten alloys for the application as plasma facing materials in future fusion facilities like ITER and DEMO requires thorough investigation of the materials performance under fusion relevant conditions. Among others this includes the damage analysis in correlation with the response to high transient thermal loads and the determination of the thermal shock resistance. In order to launch numerical simulations that will help to verify and understand test results and to predict the behavior of the material a reliable database on a reference tungsten grade has to be established. In the course of this work a newly developed pure reference tungsten grade was investigated in its stress relieved and recrystallized state under ELM relevant conditions. This comprises multiple (x100) thermal shock loading in the electron beam facility JUDITH I at different power densities and base temperatures as well as subsequent analysis of the material damage related to the materials microstructure. ····· 10361113730
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last few decades, Nuclear Magnetic Resonance (NMR) spectroscopy is popular as an analytical, major diagnosing tool in the name of MRI in thehealth care industry. However, basic researchregarding phase transition, quantum tunneling,molecular dynamics and structure is still a evergreen topic for Solid State NMR. Though commercial high-resolution NMR spectrometers are popular, they arevery expensive to procure and maintain. However, low-resolution NMR spectrometers (few MHz range) are more appropriate to understand slow molecular motions insolids. Thus, for those interested in time domainexperiments, it is appropriate to develop/build their own SSNMR spectrometers. This book describes withgreat details about the assembling and development of wide line and pulsed NMR spectrometers (withtemperature variation assembly), and 1H/19F NMRinvestigations (wide temperature range 400-4.2 K) ontechnologically important ammonium and methylsubstituted ammonium metal halides like super-ionic compounds as evident in our publications. Thefundamental and advanced instrumentation microdetails provided in this book help the reader tobuild and use their own spectrometers. ····· 10361113579
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray 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 effective reduction of the fields thanks to metamaterials is investigated because improving user`s safety compliance and handset performances is a major interest of mobile phone designers. ····· 10361113510
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Bulk GaP is an indirect-gap (2.26 eV) semiconductor and is a poor light emitter. Therefore, the crystalline size reduction in the formation of porous GaP is the crucial step towards opto- electronic device applications. Porous GaP based structures possess high luminescence efficiency across the wide range from green-blue to UV spectrum. The laser-induced etching process has the added advantage of a control of size and optical properties without needing the use of electrodes. The laser-induced etching process is a promising technique for fabricating many optoelectronic devices including: light emitter devices, detectors, sensors and large-scale integrated circuits. The surface phonon frequency depends on the nanocrystalline size, shape and dielectric constant of the surrounding medium.The average crystallite size was estimated to be 3nm. The broadening of Raman line is caused by the size distribution, which is dependent on the etching parameters. ····· 10361113419
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book consists of two parts. In the first part, we investigate the superconducting proximity effect in a clean magnetic structure consisting of two ferromagnetic layered domains with antiparallel magnetizations in contact with a superconductor. Within the quasiclassical Green`s function approach we find that the penetration of the superconducting correlations into the magnetic domains can be enhanced as compared to the corresponding single domain structure. This enhancement depends on an effective exchange field which is determined by the thicknesses and exchange fields of the two domains. In the second part, we study the superconducting proximity effect in a clean nonmagnetic metal in contact with a ferromagnetic superconductor which has a nonunitary f-wave triplet order parameter. Using the quasiclassical Green`s function approach, we solve the Eilenberger equation analytically in a non-self-consistent form. The density of states is obtained in the bulk of the ferromagnetic superconductor and it is plotted versus the energy. We have compared energy-dependence of density of states with the corresponding dependences for s-wave and d-wave superconductors. ····· 10361113245
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book the author explores the hypothesis that quantum effects of spacetime may manifest through the non-commutativity of the spacetime itself at short distances. The focus is on the two most studied examples of quantum-non-commutative spacetimes: canonical spacetime and k-Minkowski spacetime. In the first part of the book the author analyzes issues related to the propagation of classical waves on these quantum spacetimes. In the second part of the book the author discusses quantum field theory on canonical spacetime focusing on issues, related to the so-called IR/UV mixing, which are relevant for the phenomenology. ····· 10361113244· 1 · ::::: · 8 ·· 9 ·· 10 ·· 11 ·· 12 ·· 13 ·· 14 · ::::: · 27 ·
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