für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It has become exactly 51 years since the first laser was realized. The Light amplification by stimulated emission of radiation (laser) emits coherent electromagnetic radiation.Since its invention, it has been assumed to have tremendous importance in the fields of science, engineering, and technology.Moire Techniques have been used for a number of testing applications. Righi(1887) first noticed that the relative displacement of two gratings could be determined by observing the movement of the moire fringes. The next significant advance in the use of moire was presented by Weller and Shepherd (1948). They used moire to measure the deformation of an object under applied stress-by looking at the differences in a grating pattern before and after the applied stress. In this book, fringe spacings, for different grating angle separation, are determined using FORTRAN written program. The strain stress behavior of a rubber using fringe projection technique is also showed. ····· 1036188344
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is presented in five chapters. A brief summary of these chapters is given below: Chapter one presents a brief introduction and enunciates the objectives of our investigations: Chapter two presents a review of the techniques that employed to produced porous silicon nanostructures and the rapid thermal processes to enhanced characteristics of porous silicon . Chapter three describes the experimental work and presents all instruments and devices employed in this work. Chapter four presents the results and discussions of the surface morphology of the and the results with discussion of the electrical properties and other studies. Finally, Chapter five presents the conclusions and the suggested future work. ····· 1036188106
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work covers two goals: 1-The first goal is to design and construct a simple broad beam ion source with its utilization in different applications. The beam characteristics are investigated by measuring the extracted ion current under different experimental conditions. Magnetic field, gas pressure, discharge voltage and extraction potential are variable parameters. Optimization of the ion source parameters is followed for associated studies. 2-The second goal is to achieve certain applications using the beams extracted from our developed broad beam ion source. Therefore, it considers the interaction processes of the beams with the nominated targets. Hence, it includes .Adhesion improvement of PTFE by low energy ion beam irradiation. .Metalization of PTFE by ion beam sputtering process. .Surface modification of PET by low energy ion beam irradiation. ····· 1036188038
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The study of precession-driven flows in ellipsoidal containers has excited over the years a great although not constant interest. The first investigations related to this matter date back to Poincare` (1910). After Poincare`, geophysics was the main motivation for further investigations on precession driven flows in connection with the origin of the Earth`s magnetic field (Bullard, 1949). Nowadays it is generally accepted that the Earth`s magnetic field is generated by motions in the liquid outer core, but the details of this process are still matter of investigation. The generation of magnetic fields by motions in an electrically conducting fluid is called dynamo action. Most geophysicists regard convection driven by thermal or chemical buoyancy as the most likely source of energy for the geodynamo, but the possibility of a dynamo driven by the Earth`s precession cannot be rejected. The research work presented in this book intends to examine the fluid motions existing in precessing ellipsoidal cavities and eventually investigate whether the generated velocity fields are suitable to support dynamo action. ····· 1036188007
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Nanocomposite thin films of amorphous hydrogenated carbon (a-C:H) doped with noble transition metals of 1B group (gold, silver and copper) are studied. Composite materials are obtained by combined magnetron sputtering of a metal target by argon, and plasma-assisted chemical vapor deposition of methane under vacuum conditions. In low metal-content samples, the metallic inclusions have a form of isolated nanoclusters. The objective was to reveal surface cluster arrangement, i.e. to see whether topmost metallic nanoclusters are covered with a layer of a-C:H or are bald on the surface and hence exposed to the surrounding environment. The differences encountered between samples deposited onto substrates kept on the ground potential and on the negative dc bias voltage offer a possible answer to this question. From the applicative point of view, the principle mechanism that may be employed to tailor the coverage/exposure of the topmost metallic clusters embedded in the a-C:H matrix is described. ····· 1036187925
für 35.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Manganese based multiferroics, such as BiMnO3, YMnO3, HoMnO3, TbMnO3, etc, have received an attention due to fundamental physics underlying and their potential for various spintronic application such in READ and WRITE heads, field and temperature sensors, spin valves, spin filters, tunnel junctions, p-n junction diodes, non-volatile random access memory devices,etc.In order to explore various applications of doped and un-doped manganite multiferroic, at nanoscale regime, sintering temperature during the synthesis process, is the key factor. This book covers the effect of crystallite size on the dielectric behavior of Ca-doped YMnO multiferroic and study the sintering temperature induced effect of oxygen vacancies on the dielectric permittivity and relaxation mechanism. ····· 1036187855
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work has been done as a partial fulfillment for my second degree study in applied Physics. The book describes a potentially useful technique for studying the D region ionosphere, which is difficult to study with most well known instruments like ionosonde, using lightning generated VLF waves. In this work the lightning generated Very Low Frequency (VLF) waves that are reflected by the D-region ionosphere have been recorded using Stanford AWESOME VLF receiver.From this data the night time electron density profile , reflection height (altitude) of Low Latitude night time D-region ionosphere, characteristics of tweek atmospherics that reached the receiver and the lightning source distance from Bahir Dar were studied. ····· 1036187842
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cold light such as that emitted by a fluorescent lamp, surrounds us and aids our comfortable life. Nevertheless, a shadow of extinction has been cast over present fluorescent lamps. Waste electrical and electric equipment (WEEE) and restriction of the use of certain hazardous substances in electrical and electric equipment (RoHS) directives restrict the use of hazardous substances (lead, mercury, cadmium and chromium, etc.) in the manufacture of electrical and electronic equipment. After July 2006, electrical and electronic equipment containing such harmful chemicals can not be introduced to the European market. Although fluorescent lamps, which are based on a mercury-discharge, were not the object of the present restrictions, their use of mercury will be prohibited in the near future. Consequently, demand for new mercury free lamp materials for modern illuminating engineering have therefore increased recently. In concern to this issue, we had focused on synthesis of some selected rare earth activated light emitting materials (phosphors) from halosulphate, phosphate, halophosphate, oxides and fluoride materials. Aim of these materials for mercury free lamps applications. ····· 1036187801
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Large-mode-area (LMA) all-silica photonic crystal fibers (PCFs), which are specially designed with a limited number of air channels in cladding, are presented. An optimal value of relative channel diameter in the cladding of these fibers has been found (both theoretically and experimentally) that provides a single-mode regime of light propagation (at wavelength 633, 1330 and 1550 nm), low transmission and macrobending losses. Fabrication and theoretical modeling of special miniature LMA PCF tapers with selective transmission manufactured on a base of developed LMA PCFs were described. Application of these tapers for sensing with a high resolution of liquids refractive index, for sensing of high temperature in the 200-1000°C range, for temperature-insensitive measuring (in the 0-180°C range) of microstrain, for fast detection of hydrogen concentrations between 0-5.6 volume %, and for detection of organic vapors was presented. ····· 1036187737
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Superconductor materials are able to conduct current without any energy losses. These materials have remarkable and highly desirable feature for applications. Superconductivity is a quantum mechanical phenomenon and we apply quantum field theory to explain this phenomenon. Readers with some prior knowledge of condensed matter physics will find it very interesting. This monograph is intended to show the mechanism of superconductivity in A3C60(A=K, Rb and Cs) superconductors. The first part of this monograph shows exclusive excitonic mechanism of superconductivity in A3C60(A=K, Rb and Cs) superconductors. Then, we explain mechanism of superconductivity in these compounds by phonon-exciton combined mechanism. This monograph will serve both as an instructive introduction for graduate students and reference work for those already active in this exciting field and related area. ····· 1036187708
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray MRI has been an active research area during the past decade. The feasibility of detecting neuronal currents by utilizing magnetic resonance imaging (MRI) is a topic that is still under debate. The direct detection of dendrite activation with MRI would allow the active mapping of the human brain. Neuronal mapping with MRI would provide a noninvasive procedure for mapping the active neural pathways in the human brain. This book provides insight into the expected MRI signal feedback projections that can be created by dendrite chain activation. Along with the fundamental theory of MRI, multiple models of sampling techniques covering the total signal strengths are presented. Thus this book can be implemented as a starting point for future research. ····· 1036187643
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last few years experimental research has grown beyond the limit with adequate infrastructure. Research in nanotechnology is one of the major area in this context which is realized all the time in our day-to-day life. So nanoscience or nanoengineering has developed tremendous interest on young researchers in fabricating new materials with distinct morphology with useful applications. Transition metal oxides have claimed to be on the front row in this direction with variety of applications with new properties in low dimension. These materials are often studied by using different spectroscopic techniques in order to understand the inherent properties and in this project we have used Mossbauer spectroscopy to study iron oxide based nanocomposites. The intention of publication of this work is to grow motivation among graduate students especially from Indian Universities towards experimental research. ····· 1036187627
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polycrystalline thin film solar cells based on CuInGaSe2 (CIGS) and CdTe as absorber layers have been developed with efficiencies 15% using CdS as the buffer layer. However, the usage of CdS in these devices is harmful to the environment and has the potential to cause the manufacture problems due to the toxicity of Cd . Further, the collection efficiency of these solar cells is limited due to the narrow band gap of CdS (2.42 eV). Therefore, in order to improve the collection efficiency, to enhance the feasibility of manufacturing and to avoid environmental problems, it is desirable to replace CdS with a wide band gap material with appropriate properties. In this direction, novel materials have been proposed to replace the conventional CdS and In2S3 is one of the prominent alternatives. In this study, In2S3 films were grown by close spaced evaporation. The physical and chemical properties were investigated in relation to substrate temperature, film thickness and annealing in order to study the behavior of these films for their application as a buffer layer in solar cells. ····· 1036187619
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Transparent conducting oxides (TCOs) consisting of semiconducting oxides viz tin, indium, zinc, and cadmium, and metals such as silver, gold, and titanium nitride have been known and employed technologically for more than 50 years, primarily in the form of doped single-cation oxides like indium and tin. When doped with appropriate dopants these oxide films shows superior electrical and optical performance and can be widely used in the varieties of fields of science and technology. Now a days they are utilized in number of applications viz. flat-screen high-definition televisions, high-resolution screens on portable computers, electrochromic windows, hand-held new smart displays, optoelectronics, flat panel displays (FPD), solar cells, gas sensors, photo-catalysts, photoelectric-catalysis and so on. The properties of a TCO layer are found to depend on its chemical composition as well as the method used for its preparation. The quality of the thin films is judged in terms of figure of merit for which high transparency and low sheet resistance are the vital parameters. ····· 1036187535
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Transparent conducting oxides (TCO`s) have drawn great attention owing to their high electrical conductivity (10,000 S/cm) and high transparency (80-90%) in the visible region. This combination of properties makes them suitable for a number of applications such as solar cells, LCD display, OPV devices and even transparent electronics. The TCO nanostructures even showed better transparent contact than TCO thin film. High surface-to-volume ratio of nanostructures have demonstrated high sensitivity towards various target gases like NH3, CO, H2 and H2S and for NO2, which is one of the most dangerous air pollutants that causes acid rain and holes in ozone layer. To realize these applications, a basic understanding of the growth mechanism of nanostructures is a key requirement. Here, the main focus is given for tunable growth of indium oxide nanostructures and their applications. The indium metal filled indium oxide nanotube based nanorocket and indium mass transport in indium oxide nanotubes is demonstrated with the help of high-resolution transmission electron microscopy. ····· 1036187444
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The discovery of antimatter in the early 1930s posed a new puzzle: at some point in the past, the universe contained equal amounts of matter and antimatter, which should have annihilated each other completely. However, the existence of galaxies, planets, and our own bodies demonstrates that some of the matter survived this primordial annihilation, while the antimatter did not. This indicates that there must be a small matter-antimatter asymmetry in the laws of physics. Understanding these laws involves measuring the parameters governing them. The best way to measure a matter-antimatter asymmetry parameter called gamma is with particular radioactive decays of short-lived particles created in dedicated particle accelerators. This thesis describes the 1998 discovery of these decays, which constituted the first step toward the subsequent measurement of gamma. The thesis opens with a layperson-friendly introduction, using a simple analogy between particle physics and poetry. With this basic understanding at hand, the reader is led through the details of the measurement and its hi-tech apparatus, obtaining an insider`s view of how cutting-edge particles-physics experiments are performed ····· 1036187433
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Seyfert galaxies are a subclass of active galaxies and are categorized as nearby, low luminosity, radio-quiet Active Galactic Nuclei (AGN) hosted in spiral or lenticular galaxies. Seyfert galaxies are classified mainly into two subclasses named as `type 1` and `type 2` based on the presence and absence of broad permitted emission lines in their optical spectra, respectively. Seyfert unification scheme hypothesizes that Seyfert type 1s and type 2s belong to the same parent population and appear different solely due to the differing orientations of the obscuring material having a torus-like geometry around the AGN. The primary objective of this work is to examine the validity and limitations of the orientation and obscuration based Seyfert unification scheme using multiwavelength (mainly X-ray and radio) observations. It has been emphasized that the key issue in testing the Seyfert unification scheme is acquiring a well defined Seyfert sample. The statistical comparisons of X-ray, radio and IR properties of the two Seyfert subtypes have been discussed in the framework of the unification scheme. ····· 1036187415
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dimensional analysis is a simple and intuitive method for determining the functional dependence of physical quantities relevant to a certain process. In other words, it is one of the powerful, widely applicable theoretical tools to reduce a complex physical system to a simpler form before their quantitative analysis or experimental investigations. This book (containing 10 chapters) attempts to provide a basic understanding of various problems in science through dimensional analysis (DA). There are some uncommon and interesting problems which have been attempted by DA. DA also can be helpful to obtain some scaling relation without solving the differential equation. DA has been applied suitably to discuss some quantum mechanical bound state and astrophysics problems that are not often highlighted in a text book. A chapter has been devoted to discuss the breakdown of this method to classic problems in physics. This book is suitable for Under Graduate Students, Post Graduate Students and Researchers in Natural Sciences. We have included 200 exercises and 200 multiple choice questions (MCQ) for the students to test their understanding and motivate them to pursue estimation and modeling. ····· 1036187393
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray From the perspective of moduli stabilization and physics of D-branes, we consider the role of the real intrinsic Riemannian geometry and describe the statistical nature of vacuum fluctuations. The issue of the wall (in)stabilities is analysed for the marginal and threshold like vacua for arbitrary component moduli configurations breaking down to finitely many U(1)`s. From the notion of the statistical fluctuation theory, we find for both the mariginal and threshold configurations that the Gaussian fluctuations over a given equilibrium vacuum yield a well-defined, non-degenerate, curved and regular intrinsic Riemannian manifold as a function of the vacuum expectation values of the moduli. For a finite component system, we have shown that the global ensemble stability and phase transition of the underlying vaccum configuration algebraically reduce to a finite polynomial as the moduli coupling(s). The perspective study includes local and global stability domains of Higgs moduli, Coulomb branch, Calabi-Yau moduli, heterotic moduli, instanton moduli and the moduli pertaining to topological strings and an ensemble of D and M-particles. ····· 1036187365
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The study of cellular adhesion and growth on solid state substrates is a prerequisite for the evaluation of material bio-compatibility. The knowledge of the effects of topographical and chemical features of the surface on cell viability is pivotal for the development of cell-based bio-sensors, as the interface seriously influences the optical/electrical cellular signal transduction. In this book I present our contribution for the assessment of Nanocrystalline Diamond (NCD) bio-compatibility in terms of cellular adhesion and viability. Nanocrystalline diamond samples deposited on quartz substrates and a reference homoepitaxial CVD diamond sample, were used as transparent substrates to plate cultured primary neuroendocrine cells and GT1-7 clonal cell line. Surface topography at the nanoscale by AFM, composition by XPS and electro/optical features were evaluated to qualify the sample surfaces after plasma hydrogenation, different exposures to UV and wet oxidation. In order to correlate the surface topography and chemistry to cell growth and viability, calcium imaging with fluorescent dyes was used to evaluate cell excitability. ····· 1036187354
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In the present work, we study the statistics of wavefields obtained from non-linear phase-resolved simulations. The numerical model used to generate the waves models wave-wave interactions based on the fully nonlinear Zakharov equations. We vary the simulated wavefield`s input spectral properties: directional spreading function, Phillips parameter and peak shape parameter. We then investigate the relationships between a wavefield`s input spectral properties and its output physical properties via statistical analysis. We investigate surface elevation distribution, wave definition methods in a nonlinear wavefield with a two-dimensional wavenumber, defined waves` distributions, and the occurrence and spacing of large wave events. ····· 1036187287
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is a reference for researchers working in the field of phosphors. The central focus of this book is the luminescence studies of strontium sulphide based powder, thin film and nano phosphors for display applications. The first part of the book is a review of literature covering the basics of electroluminescent phosphors, ac thin film electroluminescent (ACTFEL) device operation, and experimental techniques for preparation and characterization of the samples discussed in this work. The second part covers the synthesis of some strontium sulphide based phosphors and their structural, optical and electrical characterization. Fabrication of an SrS:Cu,F ACTFEL device is also discussed. ····· 1036187282
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work deals with the study of metallic systems by using photoemission spectroscopy (laboratory and synchrotron radiation sources) and low energy electron diffraction techniques. Nano scale materials currently attract considerable attention since they offer variety of novel features. For this purpose, we grow the rare gas nano bubbles in Al(111) surface and studied core-level binding energy shift and plasmon excitation as a function of different implantation conditions. Another important system studied here is the ferromagnetic shape memory alloys, which attracted a lot of interest in recent years due to their potential technological importance and interesting physical properties. We have also studied the CuZn alloy by using inverse photoemission. We have also performed band structure calculation to understand the electronic properties of these materials. ····· 1036187231
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This project is an approach towards the synthesis and characterization of liquid Gallium filled Indium Oxide nanothermometer by using resistive chemical vapor deposition technique. All the measurements and microscopical studies has been presented by using the concepts of different microscopies like XRD/SEM/EDX/HRTEM and related sample characterization software like Pcpdfwin (XRD-Analysis), Origin (Plotting graphs), Image Tool (SEM Images Analysis) and Digital Micrograph (TEM/HRTEM Images Analysis). The growth methods such as resistive heating chemical vapor deposition (RH-CVD) and growth mechanisms such as vapor-liquid-solid (VLS) and vapor solid (VS) of growing nanotubular structures have been discussed in this report. The HRTEM-EDX measurement along the radial direction of an Indium Oxide nanotubular structure explore the in depth knowledge of the flow of liquid Gallium. These similar observations have not been reported by other authors. The synthesis of metal filled Oxide nanotubular structures may have potential applications in future nanofluid devices. It could be ideal for the semiconductor industry and bio medical fields. ····· 1036186955· 1 · ::::: · 16 ·· 17 ·· 18 ·· 19 ·· 20 ·· 21 ·· 22 · ::::: · 27 ·
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