für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents the modelling, simulation and DSP based implementation of fuzzy logic controller (FLC) based interior permanent magnet synchronous (IPMSM) motor drive. The closed loop vector control technique is used for the complete drive. The FLC is used as an intelligent speed controller. A current controlled voltage source inverter fed IPMSM drive is developed and implemented in real-time. The performance of various current controllers, particularly, hysteresis and ramp comparator controllers for the IPMSM drive, are investigated and compared both theoretically and experimentally. The control of IPMSM above rated speed is also investigated utilizing the flux weakening control (FWC) by the d-axis component of stator current, id. Below the rated speed the maximum torque per ampere (MTPA) technique is developed to utilize the reluctance torque. Finally, the performance of FLC based IPMSM drive is investigated in both simulation and experiment at different conditions. To the best of the author s knowledge this is one of the early real-time applications of FLC for motor drives. The detail implementation procedure utilizing the DSP board DS1102 is also presented in the book. ····· 10361119409
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray An effective stabilizing system for PVC/clay composites has been established in this work. Different grades of Cloisite nano-clays supplied by Southern Clay Products Inc. were investigated. The effects of processing conditions on PVC/clay composite structure were investigated. The composite structure was characterized by both TEM and XRD. The particulate structure of PVC resin affected the distribution of clay, which could be improved by increasing the processing temperature. Almost fully exfoliated PVC/Cloisite 30B nano-composites were successfully prepared by a solution process in tetrahydrofuran, and the plasticizer migration resistance of this composite was significantly improved. Other commercial fillers for PVC such as calcium carbonate and hydrotalcite were compared with Cloisite 30B. It is interesting to find that PVC crystallization in the clay galleries can occur during annealing that increased the clay gallery spacing. There seemed to be orientation of the newly formed crystallites, and two types of orientation have been proposed. ····· 10361119322
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The purpose of this thesis was to study what are the material requirements for wind power units. It was also studied how external influences, such as weather conditions, alter these requirements. In addition to ordinary weather conditions, it was studied what kind of particles and other impurities are in the air, and how the-se might affect a wind power unit. The main focus of this thesis was to study the different materials used in the con-struction of wind power units and the requirements each main section (tower, na-celle and blades) have for the materials used. It was also studied how these re-quirements changed when the unit was constructed in or near a body of water. In addition to the above, the materials commonly used at the time to writing were studied in this thesis. A small part of this thesis is given to the study of next gener-ation materials. The material for this study was searched from libraries and from databases in the internet. The study revealed that the use of old materials, such as steel, is very common. Also, different kinds of composite materials are commonly used. ····· 10361119287
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray There are numerous possible applications for redundant manipulators. Since current industrial robots have a maximum of 6 degrees of freedom, their capability of using work space is rather limited. This could be enhanced by means of extra DOF of redundant manipulators. Besides, countless applications in space and any place where maintenance, repair inspection are very difficult benefit the dexterity that redundant manipulators offers. However, there are a number of problems to be solved with redundant manipulators from kinematic control to mechanical design. Satisfactory solutions have not been obtained for path planning and obstacle avoidance problems specifically for redundant manipulators. The algorithms presented in this book offer solutions that enhance path planning and obstacle avoidance capabilities of redundant manipulators. ····· 10361119272
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Relaying is a potencial solution to improve the coverage and capacity in LTE-Networks. In this book is studied the radio resource management (RRM) in a case centralized for Relayed Enhacement LTE-Network for uplink considering the channel effects and the interferences provide by others UEs in the system. For this study are compared several aspects like SINR or the throughtput between a scenario with relaying and another without relaying, considering a LTE-Uplink Fractional Power Control and a RRM based on a matrix algorithm which use a priority metric based on Time Domain Proportional-Fair (TD-PF). ····· 10361119143
für 68.00€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book introduced the Energy Sustainability Accelerator (ESA), an informed protocol for energy participatory planning that was developed by the author and tested within a research process context. The book examined the emerging role of active participation in `planning for sustainability` in the context of energy planning in Sudan. It explored the value of integrating participatory planning and education for sustainability. The Energy Sustainability Accelerator (ESA), an informed protocol for energy participatory planning was developed by the author and tested within the research process, as a mechanism for engaging stakeholder participation in energy planning, informing sustainability socio-economic and environmental benefits of SED. The ESA process involves provision of leadership skills, technical support, and planning and design expertise to guide the participants and ensure that they are fully informed of all relevant energy sustainability ground-rules, including planning considerations, constraints, and potential options. ····· 10361119142
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Current research in tissue engineering indicates the need to investigate the effects of mechanical and hydrodynamic forces on the development of engineered-tissues cultivated in bioreactors. The unique geometry of the wavy-walled bioreactor provided various flow environments for tissue cultivation and the elucidation of cause-and-effect relationships between hydrodynamic parameters and tissue properties. These studies revealed that shear stress, as well as axial and radial flow affected tissue size, spatial distribution of cells within the scaffolds, and formation of a dedifferentiated layer of chondrocytes around tissue. A kinetic tissue-growth model was developed that predicts chondrocyte proliferation and extracellular matrix deposition in constructs cultivated in bioreactors. Using artificial neural network models, these kinetic constants were correlated with the hydrodynamic parameters. Finally, a dynamic optimization tool was developed in order to predict the bioreactor operating conditions and hydrodynamic parameters that yield tissues with desired properties. ····· 10361119052
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Product Life Cycle management (PLM) signify 21st century paradigm in the field of product development. This is strategic approach for the management of a product from cradle to grave. Made up of two major parts, authoring tools and collaborative product definition management, PLM mainly target structuring and alignment of enterprise processes. In this book fundamental concepts of PLM have been researched as perceived by the professionals and experts. PLM fundamental needs and framework has been detailed for common general understanding of common manager. The steps and approaches that can be adopted in implementation of PLM have been specified along with future directions and solutions that are shaping up for the future. This book goes a step further introducing a new RFID based net work to extend the reach of PLM beyond manufacturing phase. ····· 10361119018
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Natural convection shell and coil heat exchanger, which is the primary application of the subject of this book has been relatively less explored than most heat exchanger types and yet has potential application in a wide variety of industries including solar water heating. This book provides empirical correlations that would permit rational design of these relatively new heat exchangers and thereby lower the cost of development. Although further work may be required to widen the range of flow parameters, the results presented in this book are scalable and the correlations can be applied in designing similar exchangers with reasonable accuracy. Originally written as a thesis in partial fulfilment of the author`s doctoral degree in the Department of Mechanical Engineering, DalTech (formerly Technical University of Nova Scotia), Halifax, NS Canada, this book provides the basis for designing and rating natural convection shell and coil heat exchangers employing one to four coils. ····· 10361119002
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book very useful for beginners in the field of thin films. In this book all aspects PVD coating techniques are described, particularly sputter coating.In this two separate Si and Ti targets are with the power variations or 50,100,150 and 200 watts.The structural. electrical, optical and corrosion studies in various artificial biological solutions.The coatings shows low wear rate and good mechanical properties. ····· 10361118837
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book addresses imaging of the heart with retrospectively gated helical cone beam computed tomography (CT). It includes a chapter on the theory of CT reconstruction, familiarising the reader with the problem of cone beam reconstruction. The Extended Cardiac Reconstruction (ECR) framework is presented for heart-rate-adaptive gated helical cardiac CT reconstruction. Reconstruction assessment criteria such as the temporal resolution, the homogeneity in terms of the cardiac phase and the smoothness at cycle-to-cycle transitions are developed. Several novel reconstruction optimisation approaches are described: An approach for the heart-rate-adaptive optimisation of the temporal resolution is presented. Streak artifacts at cycle-to-cycle transitions can be minimised by using an improved cardiac weighting scheme. The optimal quiescent cardiac phase for the reconstruction can be determined automatically with the motion map technique. Results for all optimisation procedures applied to ECR are presented and discussed based on patient and phantom data. An extensive simulation study evaluates the ECR performance for systems with larger detectors. ····· 10361118809
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray `Clara` was the code name for this work. The word itself is a scientific name for a kind of ant species. In this work, we present a framework to support parallel computations, such as the one performed by the Seti@Home project, in which the workload may be subdivided in a large number of independent tasks. Unlike Seti@Home, however, Clara is not based on the master-slave paradigm, in which a well-known centralized master is responsible for supplying slave machines with computing tasks. In Clara, every node of the network is enabled to produce new tasks and introduce them in the network for computation. A swarm of Clara agents (ANTs) are responsible for exploring the network and balancing the workload by dispersing the tasks among all reachable nodes. Once computed, results are sent back to the originator node that may use appropriate mechanisms based on lease techniques to keep track of task assignments. Peculiarity of Clara comes from its ability of self-organization, adaptation and resilience which is not present in today s distributed computing paradigm. ····· 10361118805
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Many elements have been used as sacrificial anodes in protecting mild steel in seawater such elements include magnesium and zinc. The disadvantages of using magnesium and zinc as compared to Aluminium is that: they have low current conductivity, wastefully consumed in chloride environment, and supply small number of electrons per unit mass. With these advantages of aluminium over other metals as sacrificial anode, aluminium has the problem of forming a passive film on its surface in chloride environment and this prevents direct contact between the metal and its environment. Many researches have been carried out on aluminium based sacrificial anode, but the theoretical current carrying capacity of the anode is inadequate where many where using the theoretical current carrying capacity of pure aluminium instead of the alloy produced. In addition, traditional reference electrodes used for electrochemical measurements, such as the calomel and silver/silver chloride electrodes, have a limited range of applicability compared to platinum electrode. This research aimed at investigating the optimum addition of zinc and magnesium that will give the best efficiency and polarized potential ····· 10361118803
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Biometric security will play a central role in the future security system, biometric security is concerned with the assurance of confidentiality, integrity, and availability of information in all forms, biometric information is very sophisticated in terms of all, so it is needed to secure firstly the biometric information, cryptography is one of the technique to secure biometric information but The implementation of cryptographic systems presents several requirements and challenges. for example the performance of algorithm often crucially, and guaranteeing security is a formidable change, one needs encryption algorithms to run at the transmission rates of the communication links at the speed that are achieve through to designing a cryptographic algorithm . In this dissertation work the main focus is on the data pattern along with all security assurance ····· 10361118794
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Changing social needs, upgrading of design standards, increasing in loading and deterioration has to an increasing need for assessment of existing masonry arch bridges. European Union directives requiring all highway bridges to have the capacity to carry 40 tonne vehicles have served to heighten awareness of the need for effective and efficient analysis & assessment methods for masonry arch bridges. The purpose of this book is to provide a comprehensive description on theoretical background on masonry arch bridges, analytical techniques and examples that can be useful when analysing and assessing masonry arch bridges. This book has been written for the undergraduates, postgraduates and practising engineers. ····· 10361118785
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Two major problems are facing human life on earth namely, environmental pollution and the near future depletion of conventional fuel. Solutions are being sought for these problems.Many techniques are being used successfully to tackle pollution problem such as improving engine design, exhaust gas treatment, looking for non polluting fuels. Also many research are carried out and applied in the area of clean and renewable energy sources. Solar energy, wind energy, geothermal energy, tidal energy etc.Hydrogen is a non polluting and renewable fuel when used in internal combustion engines. Its combustion products are water and nitrogen oxides. The nitrogen oxides can treated by many available techniques. Hydrogen can be produced from electrolysis of water, metal hydrides, plant crops. However, there are still practical difficulties in using hydrogen purely as a fuel in internal combustion engines. It is simpler to use it blended with other hydrocarbon fuels.This book is an attempt to shedding light on using hydrogen blending technique in compression ignition engines. The book is an M.Sc. thesis prepared at Babylon University in IRAQ. ····· 10361118782
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Highly advanced math models are presented as proof validation of Micromechanics for predicting overall properties with fibers in composite materials in addition to accurate comprehensive mechanical test methods. An extension of material properties for fiber-reinforced composites readily applies to Cell Biology at the micrometer level for the cytoskeleton and surrounding extracellular matrix fibers. Advanced understanding of free radicals needed in providing exact cure conditions for polymer matrix composites can then be easily applied to free-radical theory in Biology and Medicine. Computational Chemistry is developed to explain a new field of mechanomolecular theory based on bond rotations and inversions to understand the nonpolar lipid/polar biologic fluid interface for active membrane transport, cell recognition/signaling, and chemotaxis cell movement. Pathological details for major medical conditions involving cancer and atherosclerosis are described in subsequent details never-before-presented with NIH consensus figures and diagrams. Stem-cell theory is further presented at the leading edge of understanding with basics derived from bone-marrow mesenchymal stem-cell histology. ····· 10361118708
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray E-learning has become popular amongst educationistsbecause of the inherent strengths and advantages itprovides to the instructional process. However,universities have been slow to bring e-learning intothe main stream and maximize the potential benefitsin the classroom. Many students may lack thenecessary skills to use e-learning effectively andare therefore handicapped . Yet colleges anduniversities continue to invest large sums of moneyin automation and electronic communicationfacilities. The study of student s attitude towardse-learning can in many ways help managers betterprepare in light of e-learning for the future. On theother hand , attitudes towards computer knowledgeassociated with a concept known as computer self efficacy and computer anxiety. This book , therefore, provides a beneficial tool to study students`attitude towards e-learning through different lensesof variables . Moreover , The effect of computerself-efficacy and anxiety on students` attitudetoward e-learning are studied . ····· 10361118701
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The problem of feeding the increasing world population has been treated by policy makers and researches in two dimensions: world population and production of food materials. A third problem is the protection of already produced grain. About 900 million tons of grain are currently in storage throughout the world at any given time, properly engineered and managed systems for preserving harvested grain provide whole- some food free of insect damage, live insects and mites, insects fragments and pesticides, reduce the pressure on the environment by requiring less farmland, and reduce food related illnesses in domestic animals and humans.Among the natural fibers, jute fiber is considered to be most promising material because of its wide commercial availability in the required form and at a low cost. Jute based composites have already been proved to be a potential material for various structural and non structural low load bearing applications. ····· 10361118644
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Organizations have become more dependent on information technology (IT) in the 21st century. But IT implementation and use is resisted in certain sectors of Tanzania, particularly in government-run enterprises. The purpose of this study was to investigate the causes and consequences of resistance to IT development and implementation in the Tanzanian public sector. Research questions focused on finding out which social and environmental factors might explain this resistance and how it might be affecting job performance and organizational operations. The study shows that the development and implementation of IT in the Tanzanian public sector has been negatively impacted by internal and external social and environmental factors and that the employees expect the government of Tanzania to correct this situation by involving them in the IT procurement and implementation processes. The social change implications of this study include better understanding of the role of IT in employee job performance and how to develop and implement IT more effectively in the Tanzanian public sector undertakings. ····· 10361118634
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Exploration gathers information about the unknown. This information can come in many forms, from knowledge of new terrain, to rock geology, to lifeforms. The value of these different information forms is determined by a set of information metrics, one for each form of information, that depend on the goal of the exploration task. As explorations become more complex, increasing numbers of information metrics must be considered simultaneously during exploration and often conflict with each other to compete for the finite resources of the explorer.This book introduces a new exploration technique which actively considers how much information can be gained from taking sensor readings as well as the cost of collecting this information. The methodology can consider multiple metrics of information simultaneously, and these information metrics can be changed to perform new exploration tasks. Exploration plans are produced which maximize the utility, information gain minus exploration costs, to the exploring robot. ····· 10361118542
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Over the past three decades, Radio-frequency identification (RFID) technologies have evolved to become central components of many diverse systems and applications. Recently, RFID has attracted extensive attention both from the business and the academic community. Every year many new, previously potential uses of RFID technology turn out to have efficient applications for society and industry. In this book, Ba c investigates current RFID technology and its applications, and he proposes two innovative potential uses of the technogy: An RFID Based Payment Control System for Stores, and an RFID Based Employee Control System for Multi-Plant/Multi- Location Companies. For each potential application, Ba c propses a detailed systems design, including the system components, business processes, data flows and key performance measures. The systems are then evaluated with a simulation model. A detailed performance measurement and comparison with the current system is provided along with the basic financial feasibility study necessary for launching the proposed systems. In conclusion, this book shows that the proposed systems are highly promising for real life applications. ····· 10361118258
····· lezzter Preis 44.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Globalization has drastically increased the amount of trade between different nations and this has lead to an exponential growth in shipping activities around the world. As a result, many container terminals are struggling to cope with this new surge of containers moving through their yards. Numerous container terminals are looking at the possibility of automating their container terminal so as to dramatically provide their operational efficiency and hence be able to handle higher container traffic at their terminals. There are currently a few automated container terminal designs which have been proposed and implemented in the industry. In this work, a detailed literature review was conducted on current automated container terminals to understand the limitations of current automated container terminal concepts and to better capture the needs and requirements of container terminals around the world. Based on the information gathered as well as from the analysis of each automated container terminal concept, a new automated container terminal termed the Linear Motor Automated Storage and Retrieval System (LM-AS/RS-ACT) was conceptualized. ····· 10361118256
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Polymer-clay nanocomposites have emerged as a new class of materials which have attracted considerable interest in research and development since polymer-clay nanocomposites have attained some enhancement compared to pure polymers.These new materials will enable the circumvention of classical material performance trade-offs by accessing new properties and exploiting unique synergism between materials that only occur when the length-scale of morphology and the fundamental physics associated with a property coincide on the nanoscale.Polymer-clay nanocomposites exhibit remarkable improvement in materials properties such as high dimensional stability,increased heat resistance,increased strength and modulus and deceased gas permeability compared to pure polymers.This book investigates the value-added properties of polymer-clay nanocomposites compared to pure polymers. The value-added properties for polymer-clay nanocomposites make them useful in industries such as:Automobiles,Construction, Aerospace,Electrical and Electronics and Food Packing or for everyone in academia to explore through research the usefulness of these properties enhancement of polymer-clay nanocomposites to industry ····· 10361118237· 1 · ::::: · 10 ·· 11 ·· 12 ·· 13 ·· 14 ·· 15 ·· 16 · ::::: · 47 ·
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