A critical issue with generating pseudo-random sequences for any cryptographic application is security. One of the common techniques used to generate pseudo-random sequences has been the use of Congruential Generators (CGs). One of the well-known forms of these generators is called the Linear Congruential Generator (LCG). However these generators are known to be cryptographically weak. A highly secure pseudo-random bit sequence generation scheme (Hex-Coupled System) using coupled LCGs is proposed in this book. This book introduces other schemes of coupling CGs that generate pseudo-random sequences and two novel algorithms to generate parameters for LCGs and QCGs (Quadratic Congruential Generators). It also includes the results for the...
ISBN: 978-3-6392-7830-9
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Книга по требованию
Дата выхода: июль 2011
As the demand for higher and more sophisticated security solutions has dramatically increased, a trustworthy and a more intelligent authentication technology has to takeover. That is biometric authentication. Although biometrics provides promising solutions, it is still a pattern recognition and artificial intelligence grand challenge. More importantly, biometric data in itself are vulnerable and requires comprehensive protection that ensures their security at every stage of the authentication procedure including the processing stage. Without this protection biometric authentication cannot replace traditional authentication methods. This protection however cannot be accomplished using conventional cryptographic methods due to the nature...
ISBN: 978-3-8383-8397-2
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Книга по требованию
Дата выхода: июль 2011
The emergence of quad-play services (i.e., voice, video, data, and mobility) leads to a stronger integration of optical and wireless networks. The resultant bimodal fiber-wireless (FiWi) access networks aim at providing wired and wireless services over the same infrastructure simultaneously, thus potentially leading to major cost savings. Ethernet passive optical network (EPON) is a promising technology to increase the per-user bit rate for bandwidth hungry-applications in fiber-to- the-home (FTTH) networks. Similarly, next-generation WLAN supports users with mobility in wireless networks. Until now, however, security has been mostly discussed separately either in wireless or optical networks. No profound research activity has been...
ISBN: 978-3-6392-9581-8
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Книга по требованию
Дата выхода: июль 2011
Dams are among the largest and most important projects in civil engineering. About thirty-five percents of earth dams failed because seepage through and under dam bodies. In December 4, 1991, the left side embankment of west Nubaria drain at Zawiat Abdoul Kadder village, Egypt, was failed. That failure which may be returned to the blockage effect through the dam material and/or through the filter material on the seepage forces through the embankment. In this study the effect of blockage on seepage characteristics through earth dams has been studied numerically, using a finite element based model (SWICHA), and experimentally, using a viscous flow model (Hele-Shaw), for three cases of earth dams as follows: 1-Earth dam without filter,...
ISBN: 978-3-6392-1945-6
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Книга по требованию
Дата выхода: июль 2011
This book provides details of the lateral load resistance behavior of a full scale unreinforced masonry model building subjected to contained underground explosions. The explosions were designed to simulate a high amplitude short duration seismic ground motion. Test results indicate that as an alternate to expensive and small scale shake table tests, adequately designed underground explosions can be very conveniently used for testing full scale short period structures in an actual field environment. The book also provides valuable input on the seismic hazard zoning of the city of Peshawar in Pakistan, correlation between experimental and finite element based numerical model results, and the seismic performance of low rise unreinforced...
ISBN: 978-3-6392-7803-3
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Книга по требованию
Дата выхода: июль 2011
Optical methods are increasingly used for measurement of surface texture, particularly for real measurements where the optical methods are generally faster. In the evaluation of surface roughness by machine vision technique, the scattered light pattern reflected from the machined surface is generally captured and optical surface finish parameters from the images are correlated with the actual roughness. Capturing of the image at appropriate conditions is required for the good correlation of the optical parameters with the roughness. Lighting conditions is a major factor that influences the image pattern and hence the optical parameters. In this work the lighting conditions like light source angle to the workpiece, and the angle of the...
ISBN: 978-3-8383-7567-0
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Книга по требованию
Дата выхода: июль 2011
The traditional approach for thermal insulation of cold piping is specifying either vapour-impermeable insulation material and/or a continuous vapour retarder on the warm side of the insulation to minimise vapour flow to the cold surface. In theory, these materials limit the rate of water vapour ingress to a level so low that the amount of condensed water is negligible. In practice, however, this approach requires that the vapour retarding system must be continuous at all the joints, elbows, valves and fittings present in real installation. The degree of success therefore depends heavily on both the installation and the degree of maintenance provided after installation. Even with the careful installation of vapour retarders, in...
ISBN: 978-3-8433-7062-2
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Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Selfridge Air National Guard Base or Selfridge ANGB is an Air National Guard installation located in Harrison Township, Michigan, near Mount Clemens. The host organization is the 127th Wing (127 WG) of the Michigan Air National Guard, but a variety of Air Force, Navy, Marine Corps, Coast Guard and Army reservists and national guardsmen use the facility as well. In 1971, Selfridge ANG Base became the largest and most complex Reserves Forces base in the United States. It was named for Lieutenant Thomas Selfridge, the first U.S. military officer to die in an aviation accident. The airfield was named for Lieutenant Thomas Selfridge, the first U.S. military officer to die in an aviation accident...
ISBN: 978-6-1308-9008-7
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Книга по требованию
Дата выхода: июль 2011
Semiactive control using MR dampers begins with a model development that can describe the dampers' hysteretic characters properly and control algorithms that consider the nonlinear damper voltage to force map. This book develops an efficient MR damper model from experiments. Further an intelligent optimal fuzzy logic control, a nonlinear integral backstepping and a dynamic inversion control algorithms are developed in connection to MR dampers. Experiments and benchmark applications are presented for the control algorithms. The book is with recent research as goal. It can be used as a reference for structural control courses. The applications shown here are benchmark and practical. Which make this book very useful to industry and...
ISBN: 978-3-6392-9380-7
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Книга по требованию
Дата выхода: июль 2011
Diese Arbeit befasst sich mit der Sensitivitat und der Parameteroptimierung eines Mehrkopersystem-Fahrzeugmodells. Ein Forschungsprojekt der Robert Bosch GmbH beschaftigt sich mit den Moglichkeiten und Grenzen der numerischen Simulation bei der Zuverlassigkeitsabsicherung von Kraftfahrzeugkomponenten. Im Rahmen dieses Projektes wurden zahlreiche Fahrversuche auf verschiedenen Teststrecken durchgefuhrt. Ausgangspunkt dieser Arbeit ist eine Versuchsfahrt uber eine Schlechtwegstrecke, der so genannten Wachbrettstrecke und ein bestehendes MKS-Fahrzeugmodell. Ausgehend von dem Viertelfahrzeug vorne und hinten werden fur die bekannte Prufstrecke einflussreiche Parameter identifiziert sowie deren Sensitivitat uberpruft. Die dabei gewonnen...
ISBN: 978-3-8364-8912-6
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Книга по требованию
Дата выхода: июль 2011
Rajamani Doraiswami, Lahouari Cheded, Haris M. Khalid
As the complexity of engineering systems is constantly increasing, their design calls for the sustainability and reliability of their high performance. Fault diagnosis (FD) is a vital system tool that addresses this critically-important issue. This book presents a clear and easy introduction to the sequential integration of the two major approaches to FD with application, namely model-free and model-based and draws on the power of the two approaches vitally for the detection of incipient faults which are hard to uncover by a single approach alone. In the model-free approach, this book explores from the intuitive approach of plausibility checks to the more sophisticated learning approaches (ANN, FL, Genetic algorithms, etc.) and their...
ISBN: 978-3-6392-2438-2
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Книга по требованию
Дата выхода: июль 2011
Substantial research efforts have been spent over the last two decades on improving the modelling, control, and design of pneumatic systems, which resulted in a potential growth for their market. This increasing acceptance for pneumatic technology is due to their economy and simplicity compared to other technologies of equivalent performance in terms of robustness, simplicity, and cost-effectiveness. However, servo-pneumatic applications are still limited compared to their electric and hydraulic counterparts. One of the restricting factors preventing wider applications of pneumatic systems arises from the highly nonlinear dynamic behaviours associated with such systems. This book, therefore, presents an overview on the modelling...
ISBN: 978-3-8383-5789-8
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Книга по требованию
Дата выхода: июль 2011
Cellulose Acetate Butyrate (CAB) is a transparent plastics material with a huge potential in various optical applications. In this book, a research was carried out to determine and optimize the quality of extruded sheets of Cellulose Acetate Butyrate, for use in optical applications. Different levels of plasticizers were used to improve the quality of extruded sheets, and their effects analyzed to determine the optimal levels. The research compared and investigated the four commonly used grades i.e. CAB with 5%, 8%, 10% and 12% plasticizer content. CAB 8% showed balanced properties that are desirable for optical applications. The result of the research is very useful to manufacturers, process engineers, R Данное издание...
ISBN: 978-3-6392-8923-7
Издательство:
Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! Marshal of the Royal Air Force William Sholto Douglas, 1st Baron Douglas of Kirtleside, GCB, MC, DFC (23 December 1893 – 29 October 1969) was a senior figure in the Royal Air Force up to and during World War II. Douglas was born in Headington, Oxfordshire, the son of Professor Robert Langton Douglas and his wife Margaret Jane. He was educated at Tonbridge School and Lincoln College, Oxford. At the outbreak of World War I he was commissioned in the Royal Field Artillery. In 1915, following a disagreement with his Commanding Officer, he transferred to the Royal Flying Corps joining 2 Squadron as an observer. He soon trained as a pilot and earned Royal Aero Club certificate No 1301. By September...
ISBN: 978-6-1308-9042-1
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Книга по требованию
Дата выхода: июль 2011
„Roller Coaster“ sind beliebte Achterbahnen fur Vergnugungsparks. Mit ihren monstrosen Dimensionen und hohen Geschwindigkeiten bis zu 135 km/h bieten sie viel aufregenden Fahrspass. Gleichzeitig verlangen sie hohe Anforderungen an die Betriebssicherheit. Unglucklicherweise sind Risse an den Fahrwerken verschiedener „Roller Coaster" aufgetreten. Vermutlich wurden bei der Konstruktion extreme Fahrsituationen, welche zu Uberbeanspruchung gefuhrt haben, nicht vollstandig oder mangelhaft erfasst. Im Rahmen der vorliegenden, preisgekronten Arbeit wurde die Belastung des Fahrwerkes untersucht und der aktuelle Schadensfall verifiziert. Es konnten uberraschende Feststellungen gemacht werden! Schwachstellen der jetzigen Konstruktion wurden...
ISBN: 978-3-6390-9978-2
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Книга по требованию
Дата выхода: июль 2011
Einsatzkrafte der Rettungsdienste arbeiten oft unter sehr hohem Zeitdruck. Durch die emotionale Fokusierung auf den Patienten und/oder das Ereignis, werden Sicherheitsuberlegungen oftmals in den Hintergrund gedrangt. In diesem Buch werden sicherheitsrelevante Aspekte bei Einsatzen des Rettungsdienstes aufgezeigt. Die vorliegende Arbeit soll einen Uberblick uber die rechtliche Situation und das tatsachliche Ausmass von Gefahrdungen fur das Rettungsdienstpersonal geben. Weiters werden auch Moglichkeiten der didaktischen Umsetzung fur den Ausbildungsbereich von Rettungs- und Notfallsanitatern beschrieben. Durch die Gegenuberstellung der Rechtsgrundlagen, der vorhandenen Statistiken sowie einer Erhebung des Ist-Zustands im Bereich der...
ISBN: 978-3-6392-4293-5
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Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
High Quality Content by WIKIPEDIA articles! The Sikorsky S-61R is a twin-engine helicopter used in transport or search and rescue roles. A developed version of the S-61/SH-3 Sea King, the S-61R was also built under license by Agusta as the AS-61R. The S-61R served in the United States Air Force as the CH-3C/E Sea King and the HH-3E Jolly Green Giant, and with the United States Coast Guard as the HH-3F "Pelican". The Sikorsky S-61R was developed as a derivative of their S-61/SH-3 Sea King model. It features a substantially-revised fuselage with a rear loading ramp, a conventional though water-tight hull instead of the S-61's boat-hull, and retractable tricycle landing gear. The fuselage layout was used by Sikorsky for the larger CH-53...
ISBN: 978-6-1308-9045-2
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Книга по требованию
Дата выхода: июль 2011
Lambert M. Surhone, Mariam T. Tennoe, Susan F. Henssonow
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Silica gel is a granular, vitreous, highly porous form of silica made synthetically from sodium silicate. Despite its name, silica gel is a solid. It is a naturally occurring mineral that is purified and processed into either granular or beaded form. As a desiccant, it has an average pore size of 24 angstroms and has a strong affinity for moisture molecules. Silica gel is most commonly encountered in everyday life as beads packed in a vapor-permeable plastic. In this form, it is used as a desiccant to control local humidity in order to avoid spoilage or degradation of some goods. Because of poisonous dopants (see below) and their very high absorption...
ISBN: 978-6-1314-3212-5
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Книга по требованию
Дата выхода: июль 2011
In vehicle design and evaluation, crashworthiness is one of the most important criteria. In order to save time and expense, the real vehicle crash tests have been simulated and performed through computer using finite element method since late 1980's. As the vehicle structure becomes more complicated, the size of the respective finite element vehicle model highly increases. The computer simulation therefore consumes a larger amount of computer resources and takes much longer time when using a detailed finite element model. This book provides a new methodology of developing simplified finite element models for the vehicle crashworthiness analysis. The simplified models presented in this book significantly increase the efficiency of the...
ISBN: 978-3-6390-0671-1
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Книга по требованию
Дата выхода: июль 2011
This booklet presents an organized, proven method - always helpful. We have found this process to be highly effective for first-time network planners, for those invited to be involved in the planning but don't know how, and for those who may be skilled at applying network analysis tools but need a clear guide on how to successfully complete a network planning project. This booklet includes six specific steps. It tells how to conduct a successful network planning project. It provides a carry-through case example. It gives you working forms to use. And it gives numerous other explanations and specific cases. SNP is particularly helpful when Network planning is new for you or your company and you need a standard process; Your project is...
ISBN: 978-3-6390-2546-0
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Книга по требованию
Дата выхода: июль 2011
The Turkish Straits, which are comprised of the Strait of Istanbul, the Strait of Canakkale and the Sea of Marmara, are one of the most strategically important waterway systems in the world. The Straits have a very narrow and winding shape that gives them the semblance of a river. In fact, they are one of the most hazardous and difficult to navigate waterways in the world. Together with these geographical properties, especially regarding the Strait of Istanbul, local meteorological conditions, dense and increasing transit and local traffic, vessel and cargo characteristics and a city with immense cultural heritage and 10 million plus population surrounding it, greatly increase the risks associated with maritime activities. This study...
ISBN: 978-3-8383-5836-9
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Книга по требованию
Дата выхода: июль 2011
Floods can play great havoc including loss of life, damage to property and agricultural crops, health hazards and disruption of human. The information such as peak flow and its volume are required in the design phase of irrigation, hydro-power and flood control projects. Hydrological models are widely used for the computation of flows in response of precipitation in the catchment and help to understand the characteristics behavior of a stream over a long period of time. The inputs for such models include long term records of stream flow, meteorological data and catchment characteristics. This book includes hydrological analysis of the Kanshi River catchment in Pakistan using TOPMODEL. The model predicts catchment water discharge and...
ISBN: 978-3-6393-0780-1
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Книга по требованию
Дата выхода: июль 2011
The hot and humid weather countries across the world are facing the problem of comfort living due to extreme hot climates during summer arising year by year due to emission of Green House gases. Global warming is showing its impact on every nook and cranny of the planet in one way or the other. The hot climate situation is difficult to overcome mainly when the humidity is not at the comfort levels. So the use of air conditioners had started in all most all the developing countries and the industry is growing at a rapid speed. But the use of air conditioners has unnoticeable adverse effect on the climate. The use of Air conditioners requires lot of energy and most of the times it is observed that the energy is being wasted due to poor...
ISBN: 978-3-6392-3164-9
Издательство:
Книга по требованию
Дата выхода: июль 2011