Vdm verlag dr müller jun 2010 (12 risultati)

Taschenbuch. Condizione: Neu. Neuware - In most cases polymers initiate or propagate fires because they decompose to volatile combustible products when they are exposed to heat. However, in many fields such as electrical, transport and building the use of polymers is restricted by their flammability. The current use of synthetic polymers has greatly increased the 'fire risk' and the 'fire hazard'.To fulfil the legal requirements flame retardants need to be added into the polymer. The role of these additives is to slow down polymer combustion and degradation (fire extinction), reduce smoke emission and avoid dripping in order to increase the escape time for people. The objectives in flame retarding polymers is double; first, to increase ignition resistance and second, to reduce the rate of flame spread. This book, therefore,study a range of inorganic/organic hybrid polymers containing pendant vinyl groups and their uses as possible fire retardants. The book should be useful to anyone interested in polymers and research the concept of fire retandancy.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Verilog HDL is now emerged as the most efficient solution for the design of VLSI chip as well as implementation of any complex digital design in the FPGA technology. There are a number of books available in the market on Verilog HDL. But they are very much descriptive and burdensome for the beginners to learn Verilog HDL in the short time. With a view to learn Verilog HDL in an easy approach, ¿Learn by Examples¿ method is adapted in this book. Special features of this book are: ¿A number of verified Verilog Design Examples ¿Showing design examples from simple to complex digital system ¿Finite state machine design ¿Circuits with bidirectional input and outputs ¿Efficient Verilog coding styles ¿FPGA simulation and implementation of digital design This book is proved the best handy book for the undergraduate and postgraduate students and hardware design engineer. The reader of this book having a basic background of digital circuits is expected to learn the Verilog HDL within the shortest possible time even in a day.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 112 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Information has become an indispensable resource that is used in all walks of life. It is transmitted in various ways such as printed books, magazines, websites, audio and video media, etc. As the extent of information is immense, it is not an easy job for one to find his/her specific need. In such cases building and maintaining an index is a worthwhile process. Back of book indexes and table of contents have been the two most important means for accessing specific information in books. Automatic procedures have been in use for the generation of back of book indexes. However, automatic back of indexing has not been used for Amharic books. Only a few Amharic books which are getting published nowadays try to constitute a manually constructed back of book index. Table of contents does not do much for the reader in search of specific information from a book. It will be highly time taking or even unsuccessful to retrieve the information sought. This research work presents design, development and performance evaluation of the statistical book indexing approach for the case of Amharic books.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 124 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Tissue damage in the liver and intestine of viper snake by nematodes and in the intestine of cobra by an acanthocephala is described here. These snakes were naturally infected with the parasites. Study of tissue sections revealed that the nematodes in the liver of viper cause severe damage including destruction of general architecture, atrophy and fibrosis. Lobular configuration of liver was disturbed, coagulated necrosis has occurred, melanomacrophage centers appeared. Bile duct hyperplasia with marked colangiohepatitis was observed. In the intestine the nematode caused fusion and destruction of mucosa with deformed villi, formation of granulomas in mucosa and submucosa was a common finding with large numbers of fibrous elements. The acanthocephala in the intestine of cobra caused severe tissue injury involving the whole thickness of its wall. Penetration of spiny proboscis caused severe tissue reactions, shrinkage of muscles, atrophy, necrosis and degeneration. This information is of value to research workers in this field, snake breeders and traders as well as to students and teachers of parasitology.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 160 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In this book, I have optimized the growth of n- and p-GaN films, and high quality InGaN/GaN multiple quantum wells (MQWs) on sapphire (0001) substrate by a low pressure metal-organic chemical vapour deposition and have fabricated high brightness InGaN/GaN MQW light-emitting diodes (LEDs) under optimum conditions. To improve quantum efficiency which is generally poor in the conventional rectangular-shaped QWs due to spatial indirect recombination induced by internal piezoelectric field, we proposed a possibility of quantum dot (QD) engineering with triangular-shaped band structure in the InGaN/GaN QWs. The structural and optical properties of the InGaN/GaN MQWs with different threading dislocation densities were also investigated. The effects of Si-doped n-GaN and Mg-doped p-GaN layers on the electrical and optical properties of the InGaN/GaN MQW LEDs were investigated and optimized under various growth parameters.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 156 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -A comparative analysis on the nutrient contents of six different parts of hilsa fish was performed. Most of the nutrient contents of different parts were varied remarkably. The moisture and ash content of the different parts of hilsa fish were found in the ranges of 13.00¿54.87% and 1.7¿3.8% respectively. The ranges in the values of oil, protein, free sugar and polysaccharide composition of hilsa fish were 9.61¿22.78%, 5.5¿23.18%, 0.053¿0.09%, and 0.03¿ 0.065% respectively. The minerals such as iron, calcium and phosphorus were found to be varied from 199¿212 mg%, 160¿ 180 mg% and 259¿278 mg% while the vitamins such as B1 and B2 contents were varied in the ranges of 0.35¿0.48 mg% and 2.44¿2.98 mg% respectively. The oils extracted from different parts of hilsa fish were also characterized with respect to its physicöchemical properties such as specific gravity, refractive index, saponification value, iodine value, peroxide value and acid value. The specific gravity and refractive index of oil were varied from 0.920 to 0.932 and 1.4700 to 1.4722 respectively.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 148 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The book in hand provides base-line information on the chemical constituents of Primula macrophylla D. Don like isolation and characterization of nine compounds namely ¿-sitosterol, flavone, 2¿-methoxy flavone, 3¿-methoxy flavone, 3.3¿-dihydroxy chalcone, ¿-sitosterol glucoside, 2¿-hydroxy 7-O- ¿- D-glucoside ¿macrophylloside¿ and two triterpenoid saponins, PM-F and PM-F2 . Four compounds namely 3.3¿-dihydroxy chalcone, macrophylloside, PM-F and PM-F2 were new while 2¿-methoxy flavone and 3¿- methoxy flavone are reported for the first time from the family Primulaceae and are very rare. ¿- sitosterol, ¿-sitosterol glucoside and flavone are reported for the first time from this plant in this part of the world. The book will certainly help the graduate, post-graduate students, pharmacologists and researchers as useful guideline in their respective fields.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 164 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In recent years, there have been many studies in which tailored heuristics and meta-heuristics have been applied to specific optimisation problems. These algorithms can be extremely efficient, but may also lack generality. In contrast, the research outlined in this monograph focuses on building a general-purpose combinatorial optimisation problem solver using a variety of meta-heuristic algorithms including Simulated Annealing and Tabu Search. The work is novel because it uses a modelling environment in which the solution is stored in dense dynamic list structures, unlike a more conventional sparse vector notation. Because of this, it incorporates a number of neighbourhood search operators that are normally only found in tailored algorithms and it performs well on a range of problems. The general nature of the outlined system allows a model developer to rapidly prototype different problems. The results indicate that the system achieves good performance in terms of solution quality and runtime on a range of combinatorial problems.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 216 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -The present day world is energy-hungry. Energy efficient techniques are required for sustainable development. Less energy consuming equipment and appliances are very much needed, in industry as well as in homes and offices, in manufacturing sector as well as in service sector. Heat transfer enhancement techniques with minimum additional fluid pumping power requirement are aid to energy savings. Different types of twisted-tape inserts in internal flow through ducts of different cross-sectional geometry are one such passive heat transfer technique, passive in the sense that it does not require additional expenditure of external energy. This book, therefore, provides distinctly different instances of using variants of twisted tapes, either alone or in combination with other enhancement techniques such as ribs and corrugations. The book is tailored to provide the professional engineers essential tools, heat transfer and pressure drop characteristics and correlations to design more energy-efficient and less costly heat exchangers. Researchers and academics will also find the book very useful for further research in heat transfer enhancement.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 284 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -A possibility of co-existence anti-ferromagnetism and superconductivity in oxide high temperature superconductors (HTSC) is studied. Also these studies established that the Ferro-magnetism and superconductivity can co-exist in HTSC. The magnitude of superconductivity increases with enhanced carrier's density in Cu0.5Tl0.5Ba2Can-1- zMzCun-yZnyO2n+4-d (M=Mg,Be; n=3,4; y=0,1,2,3) systems. FTIR absorption measurements of Zn and Cd- doped Cu0.5Tl0.5Ba2Ca2Cu3-yMyO10-d (M=Zn, Cd; y=0, 0.5, 1.0, 1.5, 2.0) samples have shown that electron phonon mechanism different from the BCS is essential in HTSC. By carrying out excess conductivity analyses, the coherence length, inter-plane coupling strength, exponent and dimensionality of fluctuations have been studied. The coherence length along the c-axis and interlayer coupling strength J are found to increase with increases Mg and Be doping at the Ca sites. The values of these parameters are improved after post-annealing of the samples in oxygen atmosphere which showed the intrinsic role of the optimized carrier's concentration in conducting CuO2 planes in the mechanism of HTSC.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 328 pp. Englisch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Die Arthroplastik des Ellbogens hat sich zu einer verbreiteten Behandlungsmethode für schwierig und komplex zu behandelnde Ellbogen-Erkrankungen entwickelt. Moderne Implantate, versprechen die natürliche Kinematik des Ellbogens wiederherzustellen und geben vor, durch ihre Optimierung eine große Nähe zur menschlichen Anatomie zu erreichen. Um die Qualität gängiger Totalendoprothesen des Ellbogengelenkes festzustellen, wurde die Bewegung im Ellbogengelenk an gesunden ProbandInnen und an Armen von Leichenspendern, denen eine routinemäßig verwendete Totalendoprothese des Ellbogens eingesetzt worden ist, verglichen. Für diese Untersuchung wurde erstmals ein 3-D Bewegungsanalysesystem verwendet und somit war es möglich, alle Bewegungsumfänge genauestens zu berechnen und kleinste pathologische Abweichungen objektiv festzustellen. Neue Aspekte zum operativen Einbau von semiconstrained Ellbogenendoprothesen sind zu Tage gekommen und es konnten Verbesserungsvorschläge zur Operationstechnik erarbeitet werden.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 104 pp. Deutsch.…

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Diese Arbeit hat das Ziel ein modulares Konzept und einen Prototyp für digitale mehrsprachige Gehegebeschilderungen zu entwickeln. Nach repräsentativer interner Erhebung des Zoo Berlins sind knapp ein Drittel der Besucher nicht deutschsprachig. Die fehlende Mehrsprachigkeit der Gehegebeschriftung war die Hauptmotivation für diese Arbeit. Die Grundlagen für die Konzeption waren Besucherumfragen im Zoo Berlin, die Anforderungen aus zoologischer und pädagogischer Sicht sowie ein Vergleich mit Beschilderungen anderer Zoos. Die Anforderungsdefinition sieht die Visualisierung in insgesamt acht Sprachen, die Strukturierung der Inhalte mit entsprechenden Überschriften, die Hervorhebung des Bedrohungsstatus sowie die Verwendung möglichst vieler grafischer Elemente vor. Durch den Einsatz moderner Technologien und die Trennung von tierspezifischen Daten, Strukturierung und Layout wurden mehrsprachige digitale Gehegebeschriftungen am Beispiel der Schilder für zehn Tierarten erstellt. Der Prototyp wurde am Touchscreenmonitor erfolgreich evaluiert. Die Applikation ist modular und lässt sich auf andere Beschilderungen im Bereich Freizeiteinrichtungen der Bildung und Erholung übertragen.VDM Verlag, Dudweiler Landstraße 99, 66123 Saarbrücken 128 pp. Deutsch.…