für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The construction of the PolarDARN radars at Rankin Inlet and Inuvik, completed in December, 2007, allowed polar cap convection to be measured at high latitudes. Because the Interplanetary Magnetic Field (IMF) is important in reconnection, studies of the IMF components Bx, By and Bz and solar magnetic sector boundary were done. Several PolarDARN studies are represented to show convection for different IMF clock angles and seasons. For conditions when the IMF clock angle was in the range 0° to +30°, or -30° to 0°, the convection can be driven strictly by the two types of interchange reconnection (Russell and Tanaka), resulting in a `reciprocal cell` on closed field lines and an `interchange merging cell` surrounding an interior lobe cell, as predicted by the new 3D topological `null-separator` formulation led by Dr. M. Watanabe. Anyone interested in space physics, especially magnetic reconnection and convection, the radar ACF technique and Twin - Terminated Folded Dipole Antenna (TTFD), and recent deep sunspot minimum and space weather may utilize this book. ····· 10361101760
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Friction Stir Welding (FSW) is known to result in a complex microstructural development, with features that remain unexplained, such as: the formation of the onion rings structure. Moreover, various microstructural factors have been suggested to control the strength in Al-Mg AA5xxx welds, without identifying their relative contribution. Furthermore, the influence of the basemetal microstructural parameters (e.g. grains, intermetallic particles, stored energy) on the microstructure-property development has not been previously investigated. These issues are addressed in the present study. ····· 10361101751
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cold Dark Matter is believed to constitute almost a quarter of the Universe, most likely in the form of Weakly Interacting Massive Particles (WIMPs), predicted by supersymmetry. This thesis describes the simulation methods, analysis techniques, and results for the calibration of the DRIFT-IIA directional dark matter detector. This is the first module in an array of gas time projection chambers capable of searching for WIMPs with directional sensitivity, located in the Boulby mine. Future operation, development and expansion of the DRIFT-II array will lead to increased potential for directional dark matter detection. ····· 10361101742
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray That our present understanding of the birth of massive stars is lacking is without doubt. This is because of the existing acrimony between observations and theory. Sharply, theory predicts that at ten times the mass of the Sun, the radiation field of the nascent massive star should be powerful enough to cause in-fall reversal on a global scale the corollary of which is that massive stars should not exist. Unfortunately, this is not what we see when our telescopes are pointed to the heavens. Observations thereof, indicate that stars with mass well in excess of this, do exist. Because observations take precedence over all our understanding, clearly, our theories must be at fault somehow. We revisit our understanding of the radiation problem at its most fundamental and basic level and demonstrate that indeed, we have misunderstood the matters at hand. We show that if we use the Azimuthally Symmetric Theory of Gravitation (ASTG), this problem is solved. We also show that the ASTG-model can in principle explain outflows and as-well, the fragmentation of clouds leading to the rise of the Initial Mass Function. ····· 10361101713
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work has been mostly motivated by the work of Dijkgraaf and Vafa, who wrote a series of papers in the summer of 2002, where they made a connection between topological string theory and large N random matrix models on the one hand, and showed a way to calculate the effective superpotential of N = 1 supersymmetric gauge theories from topological strings on the other hand. These three subjects, topological strings, random matrices and N = 1 supersymmetric gauge theories, are by themselves vast areas where one can get lost very easily. This thesis attempts to give an idea of these areas, first separately, with always in mind that they will be connected to each other, and then continues to some specific calculations that confirm the conjecture in one way or another. ····· 10361101563
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Shorttitle In this work a simultaneous determination of caffeine content was performed in sample of Sidama (Ethiopia) coffee, before and after roasting at either different temperature (140-2100c) or different exposure time (4-10min). A UV/VIS spectrophotometer method is used. A modest loss of caffeine was verified both in the roasting time and roasting temperature. Rate constant for chemical reactions at 2000 c were determined. The result shows weight loss increases during roasting. For pure caffeine molar decadic absorption coefficient and translational dipole moment were calculated. ····· 10361101552
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents an overview of jerk dynamical systems (involving time-rate of change of acceleration) which constitute an important class of time-continuous dynamical systems. It particularly deals with the various asymptotic dynamical behaviours of these systems with a special emphasis on chaotic behaviour. The recent analytical and numerical results of the bifurcation analysis, control and synchronization of chaos in these dynamical systems have also been discussed in detail. ····· 10361101530
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the last few decades, vanadium dioxide thin films have been synthesized using various methods/equipments. The quality of results coming out from these methods are different. But yet no one has done a comparative study on the quality of the films prepared using at least two or more of these methods/equipments. This book reports about the quality of vanadium dioxide thin films prepared using Inverted cylindrical magnetron sputtering and pulsed laser deposition. ····· 10361101465
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This doctoral thesis reports analytical and numerical results for the electrostatic response of a dusty plasma to a moving test charge. Two important physical aspects of dusty plasmas, namely grain size distribution and grain charging dynamics were taken into account. It appears that the dynamical charging of the grains in a dusty plasma enhances the shielding of a test charge. To clarify the physics, a separate study is made where the charging is approximated by using a time delay. The resulting potential shows the delayed shielding effect explicitly. was observed that the grain charging dynamics leads to a spatial damping and a phase shift in the potential response. Finally, combining these two physical aspects, generalized results for the electrostatic potential were found incorporating the terms from both grain size distribution and grain charging dynamics. The generalized results contain the previous work where these two effects were studied separately and which can now be found as special limiting cases. This kind of work has relevance both in space and astrophysical plasmas. ····· 10361101378
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Carbon nanotubes (CNTs) are one of the most interesting new materials discovered in recent years. Considerable theoretical and experimental efforts have already focused on predicting and measuring the properties of various classes of tubes. In this book, the electronic transport of CNT networks is studied by two techniques, scanning-tunnelling microscope (STM) and mechanically controllable break junction (MCBJ). The effect of contact potential on the conductivity of CNTs is investigated using different metallic substrates at ambient conditions by an STM method. The effect of electric field on electronic transport of CNT networks is investigated by MCBJ method. The conductance histograms of CNTs show that the features close to integer values of quantum conductance are independent of contact potential, electric field, and measurement technique. Hence, the electronic transport of CNTs is quantized and ballistic. The non-integer peaks are measured by the two methods in different ambient conditions. A possible explanation for these non-integer peaks is elastic scattering of the electrons at defects. These features are interpreted by series connection model. ····· 10361101361
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book introduces the revolutionary perspective of integrating science and religiousness. From a psychological point of view the presented concept brings a dramatic change into understanding perception and especially in understanding cognition of the reality. I highly recommend the reading of this book because it offers our mind and our soul the chance to explore the core of the reality. Katarina Habe, PhD, assistant professor Srecko Sorli Nirvikar unfolds an essential fact: the consciousness as a fundamental scientific research tool!, ... to reveal the sacred nature of the Universe. I recommend this book. Prof. José Luis López-Bonilla, theoretical physicist, PhD The main message/teaching of this fascinating book is how to realize Cosmic Religiousness as envisioned by Einstein by first understanding and then being actually aware of the timeless nature of the Universe. Whether one agrees or not with the ideas and teachings of the author, one thing is very clear that the book will open one`s eyes and heart to great possibilities in this age of Science and at this crucial moment in human history. Huping Hu, Ph.D., J.D., Editor of Scientific GOD Journal ····· 10361101280
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray 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 introduced for different electrical boundary conditions: metallized and non-metallized surfaces. Also, new dispersive SAW possessing single mode was discovered concerning direction [101] in various layered systems consisting of the cubic crystals. It is thought that the obtained results can be also useful in the application of inter-digital transducers for excitation of different SAWs in structural health monitoring. In addition, a theoretical study of three-layer structures consisting of widely-used weak piezoelectrics (GaAs/GaP/GaAs and GaAs/GaP/ZnTe) was also carried out. ····· 10361101232
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work evaluates the suitability of the distorted wave method (where the initial state distorted wave is due to static potential of helium atom in the initial state (11S) and the final state distorted wave is generated by the average of the initial state static potential and final state (23S or 23P) static potential of helium atom), for 11S-23S and 11S-23P excitations of helium atom by electron impact since they occur through exchange when spin dependent interactions are neglected. The differential and total cross sections for these excitations have been calculated and compared with other available theoretical and experimental results. ····· 10361101226
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is dedicated to the study of identities observed at the interface between integrable models in statistical physics and combinatorics. The story begins in the 80s when Mills, Robbins and Rumsey found a surprising relation between Alternating Sign Matrices and Totally Symmetric Self-Complementary Plane Partitions: they are equal in number, which was later proved by Zeilberger. Shortly after, Kuperberg used quantum integrability (concept coming from statistical physics), to gave a simpler and more elegant proof. Years after, Razumov and Stroganov conjectured one intriguing relation between the Alternating Sign Matrices and the XXZ chain spin model, also integrable. This conjecture was proved by Cantini and Sportiello in 2010. This work should shed some light on the role of integrability in this story, notably, the role played by the quantum Knizhnik-Zamolodchikov equation. Moreover, the interested reader will find here the proof of several delightful conjectures and some new ones. ····· 10361101208
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Di usion-reaction processes are ubiquitous in nature: they border and bridge diverse research areas such as physics, chemistry, biology and sociology. This book addresses systems where the transport properties of the reactants largely control the kinetics of the process. In this context, the need to account for the role played by the underlying, possibly complex, topology as well as by many-body effects prompts us to go over standard reaction-diffusion equations and to develop proper techniques able to work out the interplay between such features. Applications considered span a vast range of interdisciplinary fields and the systems analyzed can be as different as diffusion of charge carriers, virus spreading within a population, chemical reactions, or marketing strategies. ····· 10361101196
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Si-based microelectronic community is experiencing a sort of revolution, in order to meet the scaling rate demanded by high-tech industries. Shallow p-type junctions with high active dopant concentrations are needed. The F capability in helping the B confinement in Si is widely recognized, even if there is not a general consensus on the physical mechanisms acting. Different mechanisms have been proposed: a chemical bonding between F and B or a F interaction with point defects, through the formation of F-I (interstitial) or F-V (vacancy) complexes. This thesis investigates the F behaviour in pre-amorphized Si, opening a new route towards the F profile engineering. F is shown to strongly modify Is and Vs population, inducing an Is undersaturation or a Vs supersaturation. Such effect is transient, because strictly correlated to the transient presence of F in the Si samples. Our results allow a point defect engineering by means of F, ruling out the F-B chemical bonding as the responsible for B diffusion reduction by F, and suggesting the F-V bonding as the key mechanism governing the F behaviour in pre-amorphized Si and its capability in controlling the point defect population. ····· 10361101126
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The partitioning of interface fracture energy into bond breaking energy and plastic energy in ductile layer(s) constituting the interface is a central problem in fracture mechanics. A new approach to partition the fracture energy of a metal-ceramic interface into work of adhesion and plasticity is introduced, unveiling the nanomechanics of interfacial deformation and fracture. The crack path uncertainties are obviated by constraining fracture to occur in an interfacial molecular layer through fissure of a single bond type whose strength is varied by adjusting the chemical environment. This approach is adaptable for studying interfacial fracture and related phenomena in diverse materials systems in different thermochemical environments. ····· 10361101109
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, we investigate observable consequences of active and sterile neutrinos, in galactic, cluster, and cosmological scales. We assume that sterile neutrnos with masses of order 10`s eV, 10`s keV, and MeV were formed by oscillation of active neutrinos in the early universe. If sterile neutrinos with mass about 30 eV exist, they affect the structure of galaxies and explain the flatness of their rotation curves. Also, the existence of decaying sterile neutrinos with mass 16-18 keV can simultaneously be the cause of heating at the Milky Way center, the supermassive blackhole mass and velocity dispersion relation, the lack of cooling flow in clusters, and reionization in the universe. Lastly, we make use of the observed 511 keV annihilation flux line at the Milky Way center to constrain properties of sterile neutrinos of MeV mass scale. We also derive a relation among several cluster observables assuming the existence of an active neutrino halo, which agrees with the observational data in 103 clusters. ····· 10361101071
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The use of the observational properties of the Cosmic Microwave Background radiation (CMB) to constrain the presence of different components in the universe, which perturb the background metric, is nowadays a well-established methodology in Cosmology. In this thesis the methodology is applied to three cases: primordial magnetic fields, a hypothetical electric charge asymmetry in the universe, and the inflaton field. The main part of the thesis deals with the problem of cosmic magnetic fields: assuming that they were formed in the early universe, we derive upper bounds on their intensity and analyse the imprint of a helical magnetic field on the CMB. We also study the effect of a global electric charge asymmetry, and deduce upper limits on the charge of some fundamental particles, partly improving the current ones from laboratory experiments. The first chapters of the thesis are dedicated to the review of the theoretical framework at the basis of the treated topics: we give an overview of the physics of cosmic magnetic fields, from observations to the theory of their generation, of cosmological linear perturbation theory and of the formalism of CMB anisotropies and polarisation. ····· 10361101041
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Chapter-I presents a brief summary of the various thin film deposition techniques, their merits and demerits. The various reports on the electrodeposition of elemental, binary and ternary semiconductors have also been surveyed in this chapter. A review of the basic principles involved in the electrodeposition of the semiconductors is also given Chapter-II and III deal with the development of electrodeposition technique for CuInSe2 films.An alternative route to fabricate CuInSe2 films are explored. This consisted of electroplating a binary system comprising of Cu and In and vacuum evaporating thick selenium film over it for further selenisation treatment. Electrodeposition characteristics of Cu,In and Cu-In in the nonaqueous bath employing ethylene glycol as the solvent are discussed in chapter II. The compositional, structural and morphological analysis of the electrodeposits was also performed and the results have been presented in this chapter. Chapter III deals with the development of rapid thermal annealing technique for the preparation of CuInSe2 films from the Cu-In/Se layers. ····· 10361100984
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Energy crisis is a bottle neck in the supply of resources to any economy and issues surrounding energy supply are of paramount importance to governments world over.The present scenario of increasing shortages in the energy sector, depleting natural resources, ever increasing pollution and resulting eco-degradation and increasing stress on sustainable development programmes,have directed the scientists,technologists and administrators to hunt for alternate energy resources that are cost free and pollution free.Solar energy is a promising source for substantial future contribution to growing energy demands.This book presents a novel design of a hybrid solar oven with multiple reflectors and experimentation for its optimisation with innovative materials for maximum energy capture.This oven is unique in the sense that it can be used for cooking, roasting and baking purposes.Also this can be tracked and kept in two adjustable modes to face the sun in the F.N and A.N .Two meals /day can be prepared in this specially designed oven and is very useful for cooking. ····· 10361100943
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book discusses two approaches used as the tools to study atom lithography. The book begins with theoretical descriptions of the light force as the key element to understand how the neutral atoms can be controlled by using light. From the view point of Newtonian mechanics, the neutral atoms feel the dipole force while interacting with the standing wave. The trajectory of the atoms can be computed from Newton`s second law. On the other hand, the neutral atoms can be viewed as a wave described by a wavefunction and hence can be perturbed by a standing wave. While the wavefunction propagates through the standing wave, its phase is altered and the new wavefunction is generated. Using the concept of Feynman`s path integral, the perturbed wavefunction and its interference pattern can then be calculated. ····· 10361100931
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· 1 · ::::: · 11 ·· 12 ·· 13 ·· 14 ·· 15 ·· 16 ·· 17 · ::::: · 27 ·
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