für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray One-dimensional nanostructures are of great interest because of their potential application in many areas, such as high-density perpendicular magnetic recording media and nanosensors. The synthesis and precise control of such a magnetic nanostructure on a large scale is a challenging issue in material science. One strategy is to electrode posit magnetic nanowires into nanochannels of porous anodic aluminum oxide (AAO) templates. In this work we focused on Fe-nanowire arrays with diameters of about 30 nm, using the shape anisotropy and the crystalline anisotropy. In the present paper, we report a unique dynamically controlled growth method to prepare Fe nanowire with preferred (110) orientation along the wire. The effects of pH, symmetry/asymmetry electrodeposition voltage and frequency on magnetic properties of nenowires were investigated. Computing the samples magnetization proved that by increasing the non symmetric voltage, magnetization of nanowires increased. On the other hand, the values of coercive field and squareness of samples showed that 1000 Hz is the optimum system frequency which reveals special properties of Fe nanowires discussed in this book. ····· 10361102884
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray From the popular science media, we learn that Einstein spent the last 30 years of his life on a fruitless search for a theory that would bring all the forces of nature into one giant theoretical scheme. In this mini-monograph, which is an effort to try and achieve Einstein`s seemingly elusive dream, we improve on Weyl`s brilliant but failed geometry. We bring all the forces of nature into a unified theoretical scheme. Our scheme not only brings all forces together, but also quantum physics and gravitation under one unified theoretical framework. What is unique about the theoretical scheme that we have discovered, is that, all the forces of nature together with gravity and quantum mechanics, are all unified on a four dimensional continuum of spacetime. ····· 10361102824
für 44.91€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Organic-inorganic hybrid (OIH) semiconductors have been under extensive investigations for the past two decades due to their interesting structure, optical and electric properties. OIH materials represent a creative alternative for the design of new materials and compounds for academic research, and improvement of their physical properties and possible application in optics, electronics, ionic, mechanics, energy, environment, biology and medicine. Applications include smart membranes and separation devices, functional smart coatings, a new generation of photovoltaic and fuel cells, photocatalysts, new catalysts, sensors, smart microelectronics, micro-optical and photonic. OIH are actually composite materials formed by the combination of inorganic materials and organic polymers, however, they are not simply physical mixtures. They can be broadly defined as molecular or nano-composites with organic (or bio) and inorganic components, intimately mixed where at least one of the component domains has a dimension ranging from a few Å to several nanometers. ····· 10361102790
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Shorttitle There is peculiar similarity between equations of Einstein, Newton and Archimedes that we get indeterminate form i.e. 0/0, under some conditions. It means at one point the equations breakdown, it has been pointed out for first time. Also derivation of Einstein`s mass energy equation, which is a basis for atom bomb, contradicts the law of conservation of matter /energy under various conditions. Thus generalized equation is derived and applied in various phenomena. In some nuclear phenomena, Einstein`s equation has not been confirmed. An attempt has been made to answer the basic question, how first particle of universe was created What is the cause of gravitation These aspects are explained on the basis of generalized form of equation. Further 2265 years old Archimedes principle has been generalized, so that it may account for the eluded factors like shape of body, viscosity, surface tension, magnitude of medium etc. Also an alternate theory on rising, falling and floating bodies is developed. Thus this book deals with basic aspects of science. ····· 10361102643
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Classical electronics exploits the electron charge to designate binary information, whereas spintronics is an emerging field in which the spin of the electron is used for switching purposes and to communicate information. Spin-dependent effects may arise from interactions of the electron with an external magnetic field or with magnetic properties of the conduction material. Our work considers solid-state Quantum Dots (QD`s) in an Aharonov-Bohm (AB) ring interferometer, with externally applied magnetic fields. Computational analysis of the spin-polarized electron transport through the device illustrates the principles and promise of such devices in spintronics. Device applications of an AB-ring interferometer with externally controlled QD`s include spin-polarizers and spin-filters, used to generate and select electric currents consisting primarily of a single spin state, and for use as sensors in hard drives or spin-based circuit elements. The detailed background descriptions of the AB and Zeeman effects and their computational analysis in nano-electronic circuits will be very helpful to researchers initiating investigations into this cutting-edge field. ····· 10361102598
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cosmology the branch of astronomy which studies the formation and evolution of the structure of the entire universe on the largest scales. Recent observations seem to indicate the presence of magnetic fields on all scales of the universe. It is possible that magnetic fields have existed since very early times while the mechanisms exist to generate these fields in the late universe. Here in our research we studied the velocity perturbation scenario as a dynamo amplification of the primordial seeds field. We describe the early universe stage as multifluid, consisting of charge-neutral two-component matter and radiation fluids, linearised around the Friedmann-Lemaître-Robertson-Walker models. The oscillatory behaviour of the electromagnetic field with a new weakly damped mode is identified in addition to the standard gravitational instability picture. Vertical velocity perturbations are further found to generate magnetic fields of sufficient strength to provide a seed for the galactic dynamo. Subsequent amplification in such a way could easily lead to the observed magnetic fields in galaxies. ····· 10361102466
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book deals with study of the properties, advantages and disadvantages of organic, semi-organic and inorganic with broad perspective in detail. Growth single crystals of 4-hydroxy 3-methoxy benzaldehyde (vanillin), an excellent molecular NLO material, from melt by Bridgman technique is reported for the first time. Precise temperature profile plot of the resistive furnace was measured using a simple PC based time-temperature data logging system. Vanillin is a potential candidate for a blue light generator from IR diode laser light. New single crystals of L-Histidine mono hydrochloride (LHMHCL), L-Histidine di hydrochloride(LHDHCL), bis thiourea zinc Acetate (BTZA) and KDP:La are grown from aqueous solution. For growth of bulk crystals of La:KDP, accelerated seed rotation method was employed and rotated on both direction using a stepper motor driven by microcontroller. UV-Vis spectra show excellent transmission through the visible region up to 1100 nm. Laser damage threshold values were determined using Q-switched Nd:YAG laser operating at 1064 nm and with 25 ns pulses in single shot mode. The powder SHG efficiency was better than materials like KDP and CTA. ····· 10361102421
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book compiles experiments on polarization of light. The necessary theories, e.g. wave theory in chapter 1, electromagnetic theory in chapter 3, and quantum theory in chapter 5 are discussed at length. The second chapter determines the optical activity of transparent cellophane film using ordinary white light. The fourth chapter verifies Fresnel`s equations using sodium source. In the sixth chapter laws of reflection and refraction using a rectangular glass slab and a laser source are verified along with the variation of reflectance and transmittance of laser beam with angle of incidence. ····· 10361102400
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The Nature of Dark Matter is still a mystery many theoretical models were proposed but they have problems in explaining the small or large scale structures.A model independent approach by considering dark matter as a fluid is presented in the work which try to find out the binding energy of galaxies.The vortex formation in the Dark Matter fluid can also explain the asymptotic behavior of velocity dispersion curves of spiral shape galaxies.Analysis of theoretical and Experimental approach for search of Dark Matter is presented. ····· 10361102377
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Zinc oxide has attracted considerable attention due to its good optical, electrical, and piezoelectric properties and its potential applications in diverse areas. The novel functions of ZnO nanostructures arrays have been revealed successfully in the solar cells, gas sensors, piezoelectric, photodetectcors, LED, field emitters and so on. Films with well-aligned ZnO nanorods or nanowires may exhibit much larger surface areas than ZnO films prepared from randomly oriented nanoparticles. A plethora of physical and chemical methods have been used for the synthesis of ZnO nanostructures including physical and chemical techniques. Electrodeposition is of particular interest due to low cost, environmental friendly, and feasibility of room temperature growth. The central idea of this work is to test the applicability of simple and inexpensive electrodeposition technique as an update on previously studied methods for the synthesis of nanocrystalline ZnO thin films for solar cell. In this direction the attempts were made to fabricate zinc oxide nanocrystalline thin films by varying various process parameters and by using novel approaches, as well. ····· 10361102345
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The propagation characteristics of a step-index and graded-index optical planar waveguides with arbitrary refractive index profile have been analyzed by using different techniques: Transfer Matrix Method (TMM), Characteristic Matrix Method (CMM), Modified Transfer Matrix Method (MTMM) and the effective index method (EIM). These methods has been suggested and applied to a single mode LiNbO3 surface planar waveguide sample. Modal analysis of multilayer slab waveguides is studied and the applications are made for 2-channel Directional Coupler. We proposed analytical expressions of the dispersion equations for both TE and TM polarization modes. This method is a simplified form of TMM, which is allowed us to distinct modes by its order. Also, the applications are made, for comparison propose, to the multi-channel directional couplers. The results obtained from MTMM are fit with results obtained by TMM and CMM. Finally, the effective index method (EIM) was used together with the three methods TMM, CMM and MTMM to determine the mode propagation constants and the field profiles to a number of more complex structures. ····· 10361102306
für 49.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Since the middle of the 20th century our knowledge of elementary particles and their nature has been expanding at a tremendous rate. Series of experiments at collider centres such as at CERN or BNL have helped in probing the subatomic particle interiors and have progressed in expanding our knowledge regarding the involved interactions. This present monograph deals with the study of the spectrum of the strongly interacting particles i.e. hadrons. The procedural approach which we have utilised is the Regge trajectory phenomenology and we have tried to connect it to various distinctive features of QCD. We have formulated and solved a number of problems in this regard with the purpose of better understanding of the hadron spectrum and the dynamics involved in the hadron interior. This monograph gives a concise account of the theoretical or the experimental facet of the hadronic world. At certain stages we have obtained a clear coherence between the experimental and theoretical fronts and this substantially confirms the validity of our approach. This monograph will prove out to be beneficiary for the scientific community pursuing research in the field of strong interactions. ····· 10361102226
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is for those people who are in their under graduation or Post graduation studies and are interested in anomalous behaviour of transition metal oxide. Colossal Magnetoresistance is one such mysterious behaviour where their will be huge change in the resistance of the materials. This book is written in such a way that it will be useful for both experimental and theoretical understanding of the topic.I hope this book will give an enormous insight among students on anomalous nature and behavior of transition metal oxide. ····· 10361102219
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It is a well established result of Stellar Dynamics that the density profile in the inner galactic regions plays a considerable role in constraining the amount of orbital anisotropy admissible in stellar systems. This book focuses on the unexplored effects of the density profile at large radii on the dynamical consistency, that is non-negativity of the distribution function associated to each density component in two-component galaxy models. The case in which the second component is a massive central black hole is also addressed. By constructing a family of models characterized by free internal and external density slopes, the role of the density profile in the external galactic regions is extensively investigated, and it is found that both externally and internally steeper density profiles offer the possibility to sustain more radial anisotropy. Remarkably, the very heart of this result is contained in a general yet simple necessary condition for model consistency, which is both interesting and useful for people who work on galaxy modelling. ····· 10361102108
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Hot-pressed polymer electrolytes: Synthesis and Characterization, is mainly focused on the objectives: to develop some new Ag+ and Na+ ion conducting solid polymer and nano-composite polymer electrolytes using a novel hot-press method in place of traditional solution-cast technique to characterize their materials using various models and experimental techniques to understand the ion transport properties subsequently, to employ them as solid electrolytes in the fabrication of solid state batteries and study the cell performances under different load conditions. This book is also provide the basic ideas of ion conduction mechanism in polymer electrolytes and various models has also been explained for teansport phenomenon. ····· 10361102075
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis is an attempt to study the nonlinear optical(NLO) properties of different nanoparticles (NPs)for optical limiting, optical switching, and fluorescence applications. NLO properties of three different types of NPs are studied. These NPs show typical NLO properties due to their different energy level systems. Semiconductor NPs: Bandgap energy between the valance and conduction bands is responsible for all optical properties in semiconductor NPs. Bandgap of these NPs is tuned by changing the size. The size dependent multi-photon absorption of these NPs were studied. Metal NPs: Surface plasmon resonance band absorption plays key role in optical properties of metal NPs. Tuning surface plasmon resonance band, we have observed interesting changes in NLO properties of these NPs. Phthalocyanine NPs: Optical properties of these NPs depend on the high energy B (Soret) band and the low energy Q band(s). These NPs exhibit an increase and a blue shift in the B-band, and quenching of the Q-band compared to ordinary phthalocyanines molecules. Due to quenching of the Q-band and enhanced B-band, these NPs show NLO behaviors similar to semiconductor NPs. ····· 10361101979
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An introductory analysis of the most prominent theory for the early stages of the universe: cosmological inflation. The theory explores the dynamics of a universe that undergoes an early stage of rapid, exponential expansion, known as inflation. This answers the big problems plaguing big bang cosmology, while also providing an origin for the large-scale structure of the cosmos. The expansion itself relies heavily on the presence of scalar fields, whose energy density dominates that of the universe. To study the important implications of inflation, one must consider the effects of primordial perturbations to the spacetime, and the subsequent evolution of the universe during inflation. This analysis requires a detailed study of gauge transformations, as only gauge invariant quantities will be physically observable. Specically, this book aims at deriving the full expressions for the second order, gauge invariant Einstein equations, from which the time evolution of the primordial density perturbations may be calculated, bringing us one step closer to a deeper understanding of the cosmos. ····· 10361101940
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A new mechanism of generating electromagnetic radiation from high density magnetized plasma has been studied theoretically and experimentally. In this radiation scheme, a large amplitude plasma wakefield is generated by an intense laser pulse or a relativistic electron bunch in the presence of a modest perpendicular dc magnetic field. The initial motion of plasma electrons due to the laser ponderomotive force make them rotate around the magnetic field lines and generate the electromagnetic (EM) part in the wake with a nonzero group velocity. The magnetized wakefield propagates through the plasma and couples to vacuum at the plasma-vacuum boundary. ····· 10361101936
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray With the vast advancement in electronic devices, there have been more and more demands to go down to smaller and smaller sizes for the sake of compactness. It is interesting to see how the properties of these so-called nanoparticles differ from those of the bulk and how some novel beneficial aspects arise out of them, by virtue of their small size effects. In this dissertation, we have attempted to understand three different aspects of nanoparticle applications, namely (a) photocatalysis, (b) luminescence and (c) alloying. ····· 10361101933
····· lezzter Preis 49.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The flow in a lid driven cavity with a rotating rod has been studied by numerical simulations. The flow is suitable for studying vortex breaksdown. Breakdowns bubbles of the steady flow and unsteady flow can be controlled by the rotation of the rod. Transition of the flow was studied and the frequencies appearing in the time varying flow were determined by applying a Fast Fourier Transform (FFT). By applying Proper Orthogonal Decomposition (POD) and the newly developed Sequential POD (SPOD), one can extract a limited amount of data characterizing the flow. The modes resulting from the decomposition form a basis in the phase space on which a Galerkin projection of the equations of motion can be performed. One obtains a low-dimensional model consisting of a reduced set of Ordinary Differential Equations (ODE). This set of equations has been used for analyzing bifurcations. A method has been developed for contructing low- dimensional models with more than one free parameter. The resulting model allows one of the free parameters to appear in the inhomogeneous boundary conditions without the addition of any constraints. ····· 10361101876
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book, synthesis of metal and metal oxide nanostructures through the novel, simple and inexpensive electrical arc discharge in liquids presented. Important functional metal and semiconductor nanostructures such as ZnO, WO3, ZrO2, TiO2, Ag and Au were successfully produced. Also Ag-codoped TiO2 nanoparticles using a combination of top down arc discharge and bottom up sol-gel methods have synthesized. XRD and XPS results indicated formation of ZnO, WO3 and ZrO2 phase. TEM images revealed cubic WO3 and rod-like as well as semi spherical ZnO nanostructures. The particle size was found to increase with an increase in the arc current. Photocatalytic activity of produced nanostructures demonstrated that by increasing UV illumination time, the maximum absorption peak and concentration of Rh. B decreases in the presence of metal oxide nanostructures. In fact, decrease of concentration for ZrO2 was found to be more pronounced than the ZnO and WO3 which was due to increased surface to volume ratio. The present method can be used for the synthesis of various kinds of nanostructures from metal to metal oxide and compound nanomaterials. ····· 10361101870
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It has been more than 50 yrs Strontium-90 been used as a source to treat benign,malignant diseases and superficial disorders of the eye. This was accomplished by using the applicators.Recently, the Physicians and Medical physists world wide had a problem of accesing this applicators. The available applicators, especially Strontium-90 Ophthalmic applicators are more than 20 yrs old and are no longer manufactured.Due to the recurrence in pterygium prevention, glaucoma surgery enhancement, treatment of conjuctivae and etc, applicators have become clinically relevent again.Hence, Department of Med Physics in University of Limpopo has proposed a new model of Sr-90 eye applicator named: Teflon-Encased Eye Applicator.This book, therefore, forcus on the dosimetry of this newly proposed model, the source dimensions, geometries and applicator geometries.The results analysis showed that this applicator is effective, has similar dosimetric results as standard eye applicator and is ready to be manufactured for clinical treatment purposes.This book will be very helpful for Medical physicists and Physicians in Ophthalmology and Brachytherapy centers. ····· 10361101782
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· 1 · ::::: · 10 ·· 11 ·· 12 ·· 13 ·· 14 ·· 15 ·· 16 · ::::: · 27 ·
Affiliate Marketing
AdHoc MeldungenAffiliate & PublisherAdvertiser & MerchantAcademyAntwortenArtikelsucheAdventskalender
AffilitivProduktdatenPreisvergleich
