für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the last decade, the research on III-Nitrides semiconductor materials has increased exponentially, and engineering the III-Nitrides semiconductor materials for energy efficient laser and solid-state lighting are among the most exciting activities in nitride-based research and development area. Conventional methods of producing nitride-based laser are complicated and lack of viable approach for large scale production. Regarding existing technologies for solid-state white light sources, especially, white and color-tunable LEDs, they are suffered from severe patent issues. This book, therefore, provides new methods of engineering nitride-based materials for novel microdisk lasers and solid-state white and color-tunable light sources, with a simple, fast and mass production process. Three separate, distinctly different approaches of fabricating novel nitride-based devices are outlined. This study should help shed some light on these new and exciting nitride-based semiconductor materials, and should be especially useful to professionals in solid-state lighting fields, or anyone else who may be considering as newcomers in the GaN field. ····· 10361102059
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work aims at investigating the causes of chipping on the engobe/glaze interface found on ceramic floor coating. This defect is found at the end of the production line and, in some cases, at the consumer`s final part of a Braziliam Ceramic Company. To achieve the research`s goal, the performance of the different structural layers of ceramic floor coating (substrate, engobe and glaze) were studied individually as a more precise appoach to accurate conclusions. ····· 10361102058
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The first objective of this book is the analysis of the dominant mechanisms involved in the removal of particles using a Sieving Electrostatic Precipitator (SEP). The second objective concerns the study of the SEP pressure drop. The main collecting mechanisms in the SEP prevent the release of the bulk of the toxic substances passing through it into the ambient air. The influence of those mechanisms is studied separately in this thesis. This is accomplished by calculating the effect of Coulomb forces on the particle coagulation rate, collision frequency for particles in the laminar shear flow, collision frequency for particles in Brownian motion, and the collection of particles on a cylindrical obstacle. An important feature of this dust removal device, pressure drop, is simulated and analyzed for different screen configurations and different inlet velocities. This is carried out by utilizing the software FLUENT. In addition, user defined function (UDF) is used to enhance the FLUENT simulation resulting in more realistic results. ····· 10361102031
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Metal carbides possess unusual properties that make them desirable and useful engineering materials for many industrial applications. Here a systematic investigation is made with respect to the preparation in bulk, characterization and utilization of carbides. Three industrially important carbides viz., cementite, silicon carbide and titanium carbide were synthesized from elemental constituents by reaction milling which shows that it is highly viable and cost effective alternative. These are synthesized up to 1 kg in batch from their corresponding elemental constituents by reaction milling in a specially built dual drive planetary mill. The process is engineered at room temperature that obviates the need for expensive high temperature reaction equipments. Another advantage is that the final powder product is fine, homogeneous, and nano crystalline that can then be easily shaped and consolidated using conventional powder metallurgy processes. There is plenty of scope for improved design of the milling system with enhanced energy efficiency to make reaction milling a viable commercial technique for bulk carbide production. ····· 10361102028
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Obstructive Sleep Apnea Syndrome (OSAS) is a very common sleep disorder that is associated with cardiovascular and neurocognitive impairments. The pathophysiological mechanisms underlying the morbidity of OSAS are not completely understood, which make the research on the OSAS an important issue. Obstructive sleep apnea episodes were carefully selected and segmented in three parts, the OSA event and a certain period immediately preceding and following the event, in order to assess the dynamic electroencephalographic (EEG) power changes, in four frequency bands: delta, theta, alpha and beta. Autonomic Nervous System activity was also assessed through the spectral analysis of heart rate variability components in the three mentioned periods. Continuous wavelet transform was the elected spectral analysis technique. To better visualize the EEG spectral changes during OSA episodes across the whole brain, topographic EEG brain mapping was carried out. This research should be especially useful to health professionals, who are focused on sleep disorders, or to engineers interested in the analysis of biomedical signals. ····· 10361102004
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In India power generation is carried out through coal based power plants. The efficiency of coal power plants depends on coal combustion phenomenon. Hence there is need for understanding of coal combustion. Study of coal combustion through experimentation is tedious and expensive. This leads to use modeling techniques for understanding coal combustion. Therefore present book explains about the development of a model to describe coal combustion. The model presented in this work couples the heat transfer equation with the chemical kinetics equations. The combustion rate has been modeled by considering the first order reaction. The dependence of the convective and radiative heat transfer coefficient on Nusselt number is incorporated in present work. A finite volume method is used for solving heat transfer equation and Runge- Kutta fourth order method for the chemical kinetics equations. The model explained in present book is useful in power generation domain. The present work is helpful for research scholars and professionals who believe power of modeling. ····· 10361101992
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Geo spatial data and information are increasingly being used by different professionals to analyze and model different phenomena. This book looks at spatial analysis and modeling of urban growth using Cellular Automata, Remote Sensing, and Geographical Information System, with a particular emphasis on cities experiencing rapid spatial expansions. The book takes a critical look at the dynamics of spatial-temporal patterns of land use/land cover, and discusses urban growth issues and the need for urban management tools that can provide different perspective scenarios. Urban growth geosimulation that integrates social-economic and biophysical factors with dynamic spatial modeling is described. This is necessary for monitoring urban development processes, planning for urban service provision and managing urban planning information. This book illustrates through case studies, how spatial analysis and modeling built around GIS, can be used to identify ways in which cities may be better planned and managed.The book will be valuable reading for researchers, regional analysts, planners, policy makers, business analysts and geodemographers among many other professionals. ····· 10361101988
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Cellular wireless communication systems, based on the 3rd Generation Partnership Project (3GPP) termed as Long Term Evolution (LTE) are characterized by high mobility, efficient use of channel capacity even approaching Shannon Capacity and finally high potential to increase the cell coverage. Orthogonal Frequency Division Multiplex Access (OFDM) is a fundamental modulation technique considered in the LTE downlink transmission, while Single Carrier Frequency Division Multiplexing (SC-FDMA) is used in the uplink. To further improve the system performance provided by LTE, Multiple-Input Multiple-Output (MIMO) systems are also employed in this standard. However, the imperfections of the High Power Amplifier (HPA) have increasingly become the major bottleneck in the drive toward faster and more reliable system performance.Specially, the nonlinear amplification remains the key design issue to be solved in order to get improved overall performance. In this thesis, we give an comprehensive discussion concerning the nonlinear amplification in the multicarrier systems and state some important conclusions regarding SC-FDMA and MIMO-OFDM nonlinear detection. ····· 10361101987
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Weather radar is one of equipments that can provide real time meteorological data covering large area. A lot of activities in the capital of Thailand, Bangkok depend on the rainfall information in advance. Therefore, forecasting rainfall information is helpful for flood mitigation in the region. The Window Correlation Matching Method (WCMM) is used to determine Z-R relationship for radar calibration and it takes into account the wind effecting to rain measurement and the average reflectivity of different number of pixels in radar image. In this study, the calibration of radar is obtained with fairly satisfactory values for 60 kilometers radar range. Critical Success Index (CSI) is found to be 65 % when translation model is developed to forecast five minute time interval of rainfall over all selected fifteen areas in Bangkok. The present study proposed forecasting algorithm which can provide information of rainfall direction, time duration of rainfall. The new indicator, Critical Success Index by Time (CSIT) has been introduced to determine the accuracy of forecast at a particular location. The forecasted result shows that CSIT is about 67% on average. ····· 10361101951
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Is called enveloping of a curves family (C ) a curve CS which accomplish the conditions: for each point which belongs to the CS curve, is possible to find a unique curve from family which contain this point as ordinary point and which have in that point a contact of first order with CS for each (C ) family`s curve is possible to find an ordinary point of this curve which belongs to the CS curve too nor of the (C ) family`s curves don`t have a common arc with the CS curve. ····· 10361101935
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Injection molding is one of the well known plastic parts production method. The technology for injection molds and molding machines is quite developed and the new research is now focusing on plastic parts processing. In this book the effect of processing parameters on injection molds with different runner systems have been studied analytically and through software analysis. Experimental results have also been discussed. A chapter on designing of injection molds with hot and cold runner systems is also included. The material presented in this book is helpful in understanding the role of hot and cold runner systems in injection molds processing. ····· 10361101916
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It is possible to estimate the elastic properties of underwater sediments using single-channel seismic profiling. The task is greatly simplified if the data are recorded using a geometry that minimizes the horizontal distance between seismic source and hydrophone receiver. This produces signal ray paths that are approximately perpendicular to sediment interfaces and thereby promotes a significant reduction in mathematical complexity. It also promotes well-developed sequences of seismic wavelets that reverberate between interfaces. The amplitudes and phases of individual wavelets in such sequences encode values of propagation parameters such as bulk densities and reflection/absorption coefficients. By analyzing amplitudes and phases, it is possible to remotely estimate sediment properties. Such estimates are often useful for engineering purposes such as dredging and pile driving. ····· 10361101903
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The brake pads generally consist of asbestos fibres embedded in polymeric matrix along with several other ingredients. The use of asbestos fibre is been avoided due to its carcinogenic nature. Therefore a new asbestos free friction material and brake pads has been developed. It is envisioned that future developments in the tend of brake friction materials will closely mimic the current trends of the automotive industry. In this book, a review of the materials and constituents currently used in automotive brake friction material after the phasing- out of asbestos is presented The need to develop a new material (i.e asbestos) replacement in this area as friction material and yet maintaining the same mechanical properties still remains a bone of contention. The purpose of this book hence, is to develop a new asbestos-free brake pad using bagasse (sugar cane waste). Since bagasse is readily available and very cheap to obtain. The authors hope that this book will spring-up more research in this area and also be a useful material to the automotive industry. ····· 10361101869
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Laser machining encompasses laser drilling, laser marking, laser grooving and laser engraving, which is broadly used in industries for its extensive machining potential flexibility, high accuracy, precise, and can cut almost any materials. It works by directing the output of a high power laser beam onto the materials to be cut where, the materials then either melts, burns or vaporizes away leaving an edge with a high quality surface finish of the desired shape and geometry. In this empirical research investigation, the EN-32 mild steel with nominal thickness of 2.5mm and 5.0 mm were profiled using four by eight feet CO2 laser cutting machine. The significant effect of design parameters was investigated to produce almost perfect and clean cutting of end product. This process was then analyzed and set in order to achieve satisfactory part quality of a locally established metal cutting industry. Quality examinations in the aspects of geometrical / dimensional errors (kerf width) and cut quality (surface roughness) have been investigated. The findings can be widely used and benefited by metal cutting industries or researchers of relevant field. ····· 10361101837
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The traditional control including the classical feedback control, modern control and large-scale system theories has encountered many difficulties in its applications. Intelligent control has been a great value both for practical and potential applications in wide areas. The advanced robots, automatic manufacturing systems, industrial production process, and space system are typical application areas of intelligent control. Intelligent control is one of the newest and most important areas where the computers are used to simulate human intelligence. ····· 10361101748
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The accomplishment of the objectives of achieving a high safety level and reducing the cost through the reliance on Natural Circulation (NC) mechanisms requires a methodical understanding of those mechanisms and more particularly the instability phenomena. Instabilities occur generally due to external and internal disturbances. External disturbances include fluctuations in mass flow rate, fluctuations in inlet enthalpy, fluctuations in heat supply rate, etc. Internal disturbances include generally flow regime transitions. This requires specification of stable operating procedures, which in turn requires deeper understanding of the parametric trends. Therefore, the level of knowledge for the thermal-hydraulic phenomena for the specific geometric conditions and governing heat transfer conditions should be deeper when NC is involved. ····· 10361101699
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Intrinsically conducting polymers (ICPs) have attracted great attention because of their tunable properties and potential applications in multidisciplinary areas. Among the available ICPs, polyaniline (PANI) has found to be the most promising because of its ease of synthesis, low cost monomer, tunable properties, wide range of application possibilities and higher thermal stability compared to other ICPs. This book covers a detailed discussion on the different methods for the synthesis of PANI, different important properties of PANI and the experimental methods requires for the determination of those properties, mechanism of electrical conduction in PANI and the factors those influence the electrical conduction, problems of effective utilization of PANI and the methods adopted to overcome those problems and different applications of PANI due to its special properties with simple diagrams of device fabrication. ····· 10361101697
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents the study and development of sensing systems for the remote detection of gases with the use of microstructured optical fibres of the hollow-core type (HC-PCF) and the use of signal processing techniques usually associated with absorption spectroscopy. Photonic Crystal Fibres (PCF) arose as an exceptionally interesting player in the field of gas sensing since they promote the creation of short and direct interaction paths between light and gas and can be tuned to address any specific gas. Thus, their principle of operation and main optical properties were studied and described. The diffusion time of gases inside of microstructured fibres is a subject of special importance. As a consequence of its theoretical study and experimental analysis, fruitful results for the planning of a new configuration for a sensing head were achieved. Light coupling between standard optical fibres and hollow-core photonic crystal fibres is a practical issue that was also evaluated in the aim of the work here presented. Wavelength Modulation Spectroscopy is also presented and described in this book as it is a powerful and sensitive technique suitable for gas detection. ····· 10361101688
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray As high cost of spray grade coating powders limits the adoption of thermal spray techniques in industries, exploring low cost coating materials has become the need of the hour. This book is an exploration onto the coating potential of such a novel and cheap material called Red Mud that does not belong to the so called plasma sprayable category. Red mud is the major waste generated during the production of alumina from bauxite and it comprises of oxides of iron, titanium, aluminium and silica along with some other minor constituents. Plasma is used for deposition of red mud coatings on metal substrates. Plasma spray coating is a technique that combines particle melting, rapid solidification and consolidation in a single process. This book gives a detailed account of all these. ····· 10361101687
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book deals with the numerical and experimental study of oscillations in laminar free and impinging jets. A finite volume algorithm based on non-orthogonal cells has been used to solve the transient, incompressible Navier-Stokes equations for two dimensional flow. The code has been employed for the prediction of flow and thermal oscillations in isothermal and non-isothermal jets. For free jets, the effects of parameters such as Reynolds number, inlet temperature and jet orientation on oscillations have been studied. For impinging jet flow, the effects of stand-off distance, Reynolds number and inlet temperature on mean flow as well as jet oscillations have been studied. ····· 10361101686
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Under certain conditions Iterative Feedback Tuning (IFT) may produce a controller that cancels the poles of the process and as a result can give a closed loop that has poor internal performance. The disadvantage of this is that the closed loop will have poor input disturbance rejection. Four methods are proposed for avoiding pole-zero cancellation by concentrating on the input disturbance. These methods are using: a model for input disturbance rejection, time-weighted IFT for disturbance rejection, a setpoint-tracking model with overshoot and approximate pole placement IFT. Approximate pole placement IFT was chosen as the best method because the dynamics of the closed loop can be specified with the choice of characteristic equation. This method was then investigated further to establish its feasibility on a physical system. After the evaluation of this method, it was applied on a DC motor for speed control to show that it is viable in practice. Multiple experiments were done to show that this method does not produce a controller that cancels the process poles, confirming it as a good solution to prevent poor internal performance. ····· 10361101681
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The real human arm is a complex kinematics system. It works according to instructions calculated by a highly accurate method, and has a moving system working by deity manner. The design and simulation analysis of arm moving system model with 7-Degree of Freedom (DOF) are presented. The electromyography (EMG) signal is the activation signal for muscles in human arm and accordingly the arm will have a certain movement. The arm dynamic system in real environment simulation was implemented using the inverse kinematics problem (IKP) analytical solution. The computation time of this simulation is very fast and has the ability to include any real constrain. The finite recurrent back propagation neural network ( FRBP-NN ) is used with the simulated system for identification, classification, and human arm movements recognition with respect to a specific EMG signal. Virtual Reality Toolbox, which is interfaced with the Simulink MATLAB. Satisfactory results are obtained, which give the solution of the forward and inverse kinematic human arm and the usefulness of using FRBP-NN to recognize the movements of human arm. ····· 10361101658
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In this book wavelength division multiplexing (WDM) and dense WDM (DWDM) systems are designed. The practical components of WDM system models have been simulated through software to understand the behavior of these components and overall system considerations because of the role played by these components in the transmission processes (e.g., optical fiber, continuous wave laser diode (CW) and multiplexer (MUX)). Two types of amplifiers (Raman Amplifiers and Erbium Doped Fiber Amplifiers) are studied that are used to amplify the optical signals. Ultra wideband WDM system is proposed in this book. The total 3-dB spectral range obtained is equal to 83-nm as compared with 75-nm that is obtained today. An improved gain-flatness (7 dB as compared with the same value that is obtained today but with short distance) of a Raman amplifier with wide gain-bandwidth and a high gain-output power is obtained by using multipump configuration. 96 channels are simulated with channel spacing equal to 100 GHz (0.8 nm) distance more than 700 km and with more than distance between amplifiers 71.75 km (as compared with 50 km that is used today). ····· 10361101634
für 79.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The central problem addressed is how when an emulsion is used as a lubricant, an oil droplet may be brought to steel substrate to provide microhydrodynamic lubrication. This happens by disjoining a thin water film adhered to steel substrate separating oil from substrate. Quantum mechanical and thermodynamic insights are considered to build a model. The model may be manipulated by selection surfactants and substrates of different chemical potentials to create situations, which enable the disjoining of water film. Different types of forces using atomic force microscopy and physic-chemical methods to validate the model and come to the conclusion, that for a given chemical potential only when the droplet size is controlled by surfactant chemistry and concentration to remain below a critical size it is possible to create a strongly attractive regime between the oil and the steel to bring about the disjoining process. The author demonstrates experimentally for a range of substrates, surfactants and their concentrations in the media, that there is a combination, as suggested by his theoretical model, for which the coefficient friction, in steel on steel sliding experiment, is optimum. ····· 10361101608· 1 · ::::: · 37 ·· 38 ·· 39 ·· 40 ·· 41 ·· 42 ·· 43 · ::::: · 83 ·
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