für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Radio wave propagating between and earth-space links are adversely affected by atmospheric gases, rain, clouds,and tropospheric scintillation. The problems become more acute for countries located in the tropics. The effects of the troposphere on microwave signals due to high rain intensities lead to severe signal attenuation and outage.The objective of this work is to estimate propagation impairments on earth-space links in Nigeria, by using current meteorological (In-situ) ground data and satellite data. The telecommunication market is driven by increasing demand for multimedia services, which require wide bandwidths for high data rates available at Ka and V-band. Therefore the estimated propagation parameters such as cloud, rain, scintillation and gaseous attenuation among others,are very useful for satellite communication system designer. The database of this work will help in Planning, budgeting, and predicting transmission and reception of radio waves signals and maintain a high quality of radiowave reception during tropical rainfall. The choice of appropriate satellite equipments for Uplink and down link budget control in reception to efficient all year round transmissions. ····· 10361100867
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It is almost 100 years since the very first electron scattering experiments were performed by Ramsauer and Kollath in 1930, but today the need to obtain reliable electron impact excitation and ionization cross sections at intermediate and high energies remains as essential part of modern atomic and molecular physics. In particular there is a growing need for cross section data on more complex systems, e.g. larger organic compounds, bio-molecules and free radicals. At such energies it is necessary to account for the loss of flux into collision channels coupled to high-lying bound and continuum states of the target atom or molecule. In the last few years many important approaches have been developed to take account of this difficulty. In this book I will describe a unique technique that uses complex optical potential to compute the various total cross sections. ····· 10361100806
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book presents technologically important four organic NLO crystals particularly, HA, 2A-5CB, LAA and LTN.It explains the various methods of crystal growth in detail. A literature survey on various NLO crystals is provided with references. Also explains the various tools and techniques for characterizing the crystals. The optimized growth conditions and physico chemical properties of pure and Acetanilide, Benzamide and Urea doped Hippuric Acid (HA), pure and Benzophenone, Benzoic acid and Paratoluidine doped 2-Amino-5-Chloro Benzophenone (2A-5CB), pure and Cu2+ and Mg2+ doped L-Arginine Acetate (LAA) and pure and Cu2+ and Zn2+ doped L-Tartaric Acid Nicotinamide (LTN) NLO single crystals. The variation of growth parameters and physico chemical properties of these crystals were compared and reported in detail. ····· 10361100780
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work describes the terahertz (THz), optical and electrical properties of GaSb, InSb, AlSb, GaInSb, and AlInSb alloy crystals grown by vertical Bridgman technique. Theoretical analysis using the ConwellWeisskopf and Brooks-Herring approaches indicate the transport and optical properties of highly compensated GaSb substrates are dominated by ionized impurity scattering. Also, enhanced emission of terahertz (THz) radiation has been observed from impurity compensated GaSb substrates. Time domain THz emission spectroscopy (TDTES) measurements show strong emission of THz radiation for the highest tellurium compensated samples of either p or n type conductivity. Theoretical analysis show that both mechanisms, the photo Dember effect and the surface field effect, are responsible for the enhanced THz generation in the tellurium compensated GaSb substrates. Depending on the electrical properties of the semiconductor material, either one of the two mechanisms is dominant. For instance, the photo Dember effect is responsible for THz generation p type samples, and the surface field effect is responsible for THz generation in n type samples. ····· 10361100711
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis focuses on fabricating and studying (p-channel, n-channel and bilayer) field effect transistor devices under dark, steady state and transient illumination conditions. This thesis probes injection barrier at metal-semiconducting polymer interface that determine the overall charge injection property of the device. FET`s consisting on n-channel acceptor with a coating of optically active donor polymers is studied. Presence of D-A interface in FET showing n-channel transport is used to study the process of charge separation and charge transport occurring in bulk of the acceptor upon photoexciting the donor polymer. ····· 10361100690
····· lezzter Preis 17.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Quest opera (edizione rilegata) fa parte della collana di libri TREDITION CLASSICS. La casa editrice tredition di Amburgo pubblica nell`ambito della collana TREDITION CLASSICS opere datate più di 2000 anni. Queste opere erano in gran parte esaurite o reperibili solo come pezzi d`antiquariato. La serie di libri contribuise a preservare la letteratura e a promuovere la cultura. Essa aiuta inoltre ad evitare che migliaia di opere cadano nel dimenticatoio. L`obiettivo della serie è di ripubblicare migliaia di classici della letteratura mondiale in diverse lingue... in tutto il mondo! ····· 10361100515
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Kniga soderzhit glavu fundamental`noy kvantovoy mekhaniki i kvantovoy teorii polya - o vremeni kak kvantovoy nablyudaemoy, kanonicheski sopryazhyennoy energii, dlya sistem s nepreryvnymi i diskretnymi spektrami energii. Eta glava v zakonchennom vide do sikh por nikem ne mogla byt` napisana iz-za ryada matematicheskikh problem.Reshenie etikh problem v oblasti teorii operatorov v gil`bertovykh prostranstvakh dlya sistem s nepreryvnym spektrom energiy uzhe davno znali nekotorye matematiki, no ikh reshenie bylo neizvestno fizikam, krome avtora i ego druzey. Preodolenie etikh i drugikh matematicheskikh problem pozvolilo, nakonets, razvit` i primenit` metody vremennogo analiza kvantovykh protsessov i napisat` etu knigu. Krome togo, v ney izlozhen ryad primeneniy po vremennomu analizu kvantovykh protsessov i paradoksov tunnelirovaniya i stolknoveniy (yadernykh reaktsiy), razrabotannykh na protyazhenii ryada let avtorom, chastichno sovmestno s sotrudnikami ego laboratorii i s ego kollegami iz raznykh stran. Prednaznachena dlya nauchnykh sotrudnikov i professorov po kvantovoy mekhanike i kvantovoy teorii stolknoveniy, aspirantov, studentov i vsekh interesuyushchikhsya kvantovoy mekhanikoy, kvantovoy teoriey polya i yadernoy fizikoy. ····· 10361100422
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Semiconducting chalcogenides in various nanoforms have gained importance in recent years due to their size and shape dependent physical properties. Amongst them Cadmium Sulfide (CdS) has gained recognition as a promising material for light emitting diodes, solar cells and photoconductive devices by virtue of its photosensitive properties. So far, field emission studies on CdS nanostructures have been aimed towards the synthesis of various morphologies by a variety of routes, the attainment of lower turn on voltages, higher current densities at lower fields, and better stability. Present book deals with the literature survey in regards to the synthesis and field emission studies of CdS. Controlled synthesis of CdS nanostructures as well as their detailed optical, structural characterization and also field emission investigations are summarized in the book. Since CdS exhibits intrinsic photoconductivity, it is of scientific and technological interest to explore the photo-enhanced field emission behaviour of its nanostructures which is basic intend of the book. Possible reasons behind the observed photo-sensitive field emission behaviour are also discussed in detailed. ····· 10361100376
für 64.71€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A quarter of a century on from the discovery of high- superconductivity in Cuprates, there is still no agreed mechanism for the pairing of carriers. Both the pairing mechanism and phase diagram of Cuprates are far from being completely understood. In the present work, an attempt has been made to explain various aspects of Cuprates superconductors based on photo induced effect in two band model.The model explains some of the observed properties of and similar systems. The theory conclusively demonstrates that photo excitation induces and enhances superconductivity in Cuprates.This book will prove invaluable for students and scientists contemplating research in this field. ····· 10361100350
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray During the past few years, the high pressure structural phase transition in Rare Earth Compounds has been studied extensively. These materials are mostly ionic in nature crystallize in the rock salt structures at ambient pressure. In the rare earth compounds, the electrons hybridized between two states, which have nearly equal energy. These properties have been correlated with existence of unfilled f electron shell of RE ions, which therefore interact strongly with the lattice. In the present book a theoretical model has been used in order to understand the effect of f- electrons on phase transition, elastic, mechanical and lattice dynamical properties. The necessity of the development of present two body ineriionic potential model and various interactions required essentially for a complete account of the cohesion in RE compound have been described. We have also discussed Breathing Shell Model (BSM) theory to calculate complete phonon spectrum, density of states and specific heat of Neptunium Chalcogenides in this book. ····· 10361100335
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is about theoretical physics especially Mathematical Physics in Dynamic. This means the trajectory for any system and its behavior in nature. So, when we know position or trajectory at any time, we can determine everything for this system, e.g. velocity, energy, momentum, pressure, etc. All physical or natural systems are constrained system, except free particles. Newtonian, classically and Quantum Mechanics have Hamiltonian and Lagrangian approach which depend on the energy of the system. From action principle we can arrive to equations of motion from which we can obtain the position or trajectory in any time. It is not an easy task. We can apply this approach for several branches of physics, Electromagnetic, Einstein Gravitational and Field Theory, etc. This book tackles some systems in an approach which is based on Hamilton-Jacobi approach, examine the equation of motion and find out the solution in real physical system. It also tests the validity of this approach on real physical system because its author tests his approach on mathematical models. This book also quantizes the system, since any classical system can be quantized to obtain eigenvalues or energy level. ····· 10361100306
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Scanning gate microscopy (SGM), developed in the late 1990`s, has become a powerful tool to investigate the local electronic properties in semiconductor nano devices. SGM is based on the AFM technique but the metallic tip is used as a movable gate capacitively coupled to the device, and the electron transport property is studied on influence of this gate, providing spatial information with high resolution. This thesis presents the SGM measurement results on various nano devices, all of which are fabricated from InGaAs/InAlAs heterostructures containing a high mobility 2DEG located a few tens of nanometers below the surface. In a work on Braess paradox, with the help of numerical simulations, we discover a Braess paradox effect by modulating a channel width in a `double-ring` shaped mesoscopic device in analogy with the one that occurs in a classical network. By a detailed study of the conductance changes, we discover several charge traps from the SGM map, and propose a model to interpret the conductance change with the presence of charge traps. We develop a method to directly image the charge traps by transconductance measurements with a voltage modulation on the tip. ····· 10361100156
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book,we study the dynamics of thin fluid films and drops, driven by external forces, including gravity and surface tension in a variety of situations. The motion of these fluids are investigated on both hard(silicon) and soft(gel) surfaces. We explore a variety of issues related to the propagation of the fluid front and the contact line through a number of experiments along with numerical simulations whenever possible. This book will appeal to the growing community of soft matter scientists. ····· 10361100144
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the natural world, people have discovered four kinds of forces: electromagnetic force, gravitation, weak force, and strong force. Although the gravitation has been discovered more than three hundred years, its mechanism of origin is unclear until today. While investigating the origin of gravitation, I do some experiments discover the moving photons produce gravitation. This discovery shows the origin of gravitation. Meanwhile I do some experiments discover the light interference fringes are produced by the gravitation which moving photons produce: my discovery demonstrated that light is a particle, but is not a wave-particle duality. Furthermore, applications of this discovery to other moving particles show a similar effect. In a word: the micro particle moving produce gravitation and electromagnetic force. Then I do quantity experiment get a general formula in nature: Reveal the essence of gravitational mass and the essence of electric charge reveal the origin of gravitation and the essence of matter wave. Along this way, I unify the gravitation and electromagnetic force. Namely I find a natural law that from atomic world to star world play in moving track. ····· 10361100042
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Atomic coherence is induced in the multilevel atomic system via strong control field that alters the response of medium to a weak probe laser field. This involves quantum interference in the amplitudes of optical transitions and causes the cancellation of absorption i.e. electromagnetically induced transparency (EIT). reducing the absorption via EIT can be employed to enhance the performance of waveguides that are extensively used in communication to transport electromagnetic waves from one point to another. ····· 1036199910
für 50.31€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Most power applications today rely on copper wire to conduct electricity. However, with the rapid progress of HTS technology in the last decade, superconducting wire promises to become a viable copper alternative for advanced power systems. HTS wire carries more than one hundred times the current of an equivalent size of copper wire and also has zero resistance to direct current electricity. These attributes can translate into significant reductions of cost, size and weight for motors, generators, and power cables. This book is a practical work to prepared High Temperature Superconductor Bi2-xHgxSr2-yBayCaCu2O8 and Bi 2-xHgxSr2-yBayCa2Cu3O10 compounds were prepared with (0 ,0.05 ,0.1 ) Hg and Ba substation instead of Bi and Sr respectively by solid state reaction and then ground to fine powder of about ( 0.3 and 0.4) m average particle size using Powder In Tube Method(PIT). ····· 1036199777
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Analytical spectroscopic techniques have been extremely useful and results oriented in terms of environment assessment. This book deals with the techniques like energy dispersive x-ray fluorescence (EDXRF), x-ray diffraction (XRD), scanning electron microscope (SEM), induced coupled plasma mass spectroscopy (ICP-MS), atomic absorption spectroscopy (AAS) and their applications on soil, plants and water samples. The basic theory, provided along with the all experimental details is a key feature of this book. Various sample preparation methods have been used and studied, as well. The proper use of different multivariate statistical methods, applied on the large data, enable us to comprehend the results and to interpret them. Statistical methods like PCA, Ridge Regression, PCR regression, etc. are employed in the book, in a detailed manner. ····· 1036199741
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The atomic system drived by a strong coherent field at resonance or near resonance is excited and de-excited repeatedly at Rabi frequency. Inside a cavity or waveguide, the spectrum of the electromagnetic field modes is strongly modified for wavelengths that are comparable with or longer than the physical dimensions. Within a cavity of high quality factor (high-Q) the atoms are coupled to very few cavity modes and the radiation can survive long enough in the cavity to re-excite the atoms, making the spontaneous emission reversible and nonperturbative. Mesoscopic Multistability phenomenon results from the interaction of a beam of N Rydberg atoms, flying through a high-Q cavity and drived by a coherent field, with an excited single cavity mode at steady state. The term Multistability means that for certain input (driving) field intensity there may exist multiple values for the output (intracavity) field intensity. ····· 1036199648
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In 1982, a novel phase known as quasicrystal possessing a long-range orientational but quasiperiodic translational order was discovered in a rapidly solidified Al Mn alloy (Shechtman et al. Phys. Rev. Lett. 53 (1984: year of publication)). Quasicrystals are orientationally-ordered structures with classically forbidden rotation symmetries (e.g. fivefold and tenfold rotation axes) which are incompatible with the periodic translational ordering and this discovery has completely changed the understanding of crystallography. For this discovery, the 2011 Nobel Prize for Chemistry has been awarded to Professor Danny Shectman. Prof. Shechtman himself is said to have cried `Eyn chaya kazo`, which translates from the Hebrew as `there can be no such creature`. Over the last 25 years, quasicrystals have become the subject of intense experimental and theoretical studies. The present book is divided into seven chapters including introductory literature survey, review of classification, synthesis, structures, stability, properties and applications of quasicrystalline materials. ····· 1036199642
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The complexity of quantum chromodynamics in the non-perturbative domain forces physicist to resort to models in order to describe the phenomena of intermediate energy physics and hence this book develops three different quark models to study light and some heavy mesons: a non relativistic quark model with one-gluon-exchange potential(OGEP) and Instanton-Induced Interaction (III) a semi-relativistic quark model with OGEP and III where the confinement of the quark is modeled with the relativistic harmonic model a relativistic model where the features of the two previous models are supplemented with the introduction of gluon confinement and thus confined one-gluon-exchange potential (COGEP). Both tensor and spin-orbit parts of the interactions are taken into account in all the three models. It begins with an introduction to the quark model of hadrons covering the SU(3) symmetry in chapter 1 and it discusses in detail the constituent quark models in chapter 2. The three models and a description on decays are developed in chapters 3 and 4. The results and conclusions are presented in chapters 5 and 6. This book predicts mass spectra and certain decays of light and some heavy mesons. ····· 1036199577
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Fe-based compounds exhibit a rich diversity of magnetic phenomena, such as magnetovolume and magnetocaloric effects, which makes them very promising for basic studies as well as for a large number of applications. The magnetocaloric effect is the key for magnetic refrigeration, which could replace conventional gas compression technology. Magnetocaloric materials must display large temperature variations under an adiabatic magnetic field change and a large isothermal entropy response. The shape and behavior of the isothermal entropy change or the adiabatic temperature change can vary notoriously from one material to another depending on the character of the magnetic phase transition. R2Fe17 (R = rare earth) and Nanoperm Fe-based alloys exhibit a caret shape characterized by a broad peak related mainly with second order phase transitions. Moreover, these materials have magnetovolume anomalies which produce anomalous temperature dependence of their volume, having a minimum close to the magnetic phase transition temperature. This is a desirable feature for a magnetic refrigerant, as it would reduce the degradation of the refrigerant material as a consequence of the working cycles. ····· 1036199520
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Science is an art of living being and engineering are sub-branches of science.By the use of scientific knowledge at the nano-scale phenomenon and by the application of engineering at the nano-scale we are able to design nano-devices, nano-machines etc. In earlier days biology was applicable only in medicine field. Today there is a need to start the program from biological and engineering students to take active part in nano-science. By the application of nano-science we can save human life. From few years there is an great achievement in the living and educational standard in society by the implications of Nano-science and Nano-Technology. Nano-science is in great demand due to an interdisciplinary area, inter and intra engineering, physics , medicine and basic sciences. Is it really a connection between nano-science engineering and human being.Applications of nano-science and nanotechnology are in every area of daily life. ····· 1036199506
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis captures the progress on Fractional Quantum Hall Effect based on the Ginsburg-Landau Chern-Simons field theoretical approach, i.e. theory that proceed from microscopic electronic Hamiltonian to the final solution via a sequence of transformations and approximations. The detailed theoretical review of the fractional quantised Hall Effect includes both the trial wave function approaches which were forwarded by Laughlin and Jian, and the field theoretical approaches which were forwarded by Lopez and Fradkin. The Ginsburg-Landau Chiron-Simons field theoretical approach, in which electrons are converted to Chiron-Simons composite bosons that carry attached flux tubes, is considered as a better theoretical approach to explain different phenomena of fractional quantum Hall effect. ····· 1036199502
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Coating uniform thin films on inner surfaces of tubular objects for strategic and commercial applications like barrels is a challenge. Among the several techniques being employed presently for the large area coatings and coatings on tubular objects, cylindrical magnetron cathodes are being used widely. Though there are several designs presently in use, large scope exists for improvements in the design of cylindrical magnetron cathodes. Hence in the present book, design aspects of cylindrical magnetron cathodes useful for coating inner or outer surfaces of planar or tubular surfaces were discussed and arrived at improved (performance) R C-Magnetron cathode geometry. As the tantalum and tantalum based nitride coatings have wide applications in biological, electrical, surface engineering, etc. the same were developed using R C-Magnetron cathodes with different deposition parameters and results pertaining to arriving at the best possible deposition parameters for Ta based hard coatings were presented. ····· 1036199490· 1 · ::::: · 12 ·· 13 ·· 14 ·· 15 ·· 16 ·· 17 ·· 18 · ::::: · 27 ·
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