für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Validation is the subjective process that determines the accuracy with which the mathematical model describes the actual physical phenomenon. This research was conducted in order to validate the use of finite element analysis for springback compensation in 3D scanning of sheet metal objects. The measurement uncertainty analysis was used to compare the digitized 3D model of deformed sheet metal product with the 3D model obtained by simulated deformation. The influence factors onto 3D scanning and numerical simulation processes are identified and analyzed. It is shown that major contribution to measurement uncertainty comes from scanning method and deviations of parts due to manufacturing technology. The analysis results showed that numerical methods, such as finite element method, can successfully be used in computer-aided quality control and automated inspection of manufactured parts. ····· 1036118535
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The main focus of my research was to look at the relationship between seated posture, specifically lower back curvature or lordosis, biofeedback control, and lower back pain. There were initially three main objectives with this project: The first objective was to develop a device that would be capable of measuring and recording the curvature of the lower back. The second main objective of the project was to see if there was any correlation between biofeedback and seated posture. Furthermore, could biofeedback from the device be used to control this posture. The last objective of the project was to determine if controlling seated posture utilizing biofeedback, from the device, had any effect on low back pain. ····· 1036118514
····· lezzter Preis 53.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Grinding is characterised by high specific energy and high grinding temperature that often leads to thermal damages and poor surface integrity, particularly induction of tensile residual stress. Residual stress on ground component can be reliably assessed by x-ray diffraction (XRD) technique, but the same is basically a laboratory based procedure and time consuming. Micro-magnetic technique like Barkhausen Noise (BN) provides much faster in-situ measurement of residual stress but is restricted to ferromagnetic work material and it needs calibration. The main aim of the current work is to evaluate applicability of BN technique to assess surface integrity aspects, with emphasis on residual stress, in grinding. The study encompasses two work materials ground using three grinding techniques to cover a wide experimental domain. The experimental results indicate successful application of BN technique in assessing surface integrity of ground components despite simultaneous change in state of stress, hardness and grain size of the work material. The present work introduced the novel signal processing technique for work materials exhibiting poor BN response. ····· 1036118492
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book provides information on Aluminium based raw material consumption, production, and availability in the Kenyan Industry. Specific processes at each stage were considered in order to shade light on the cost and how much is held at that particular stage. This was done by looking at the Material Flow and Value Chain Analysis of aluminium based raw materials in the Kenyan Industry.. Annual collective data on aluminium consumption, production and efficiency was considered in the analysis. The years from 2003 to 2007 were considered as the study period, and the raw materials covered included: local bauxite, imported bauxite, imported billets, coils and ingots, imported semi fabrications, and castings, imported scrap and local scrap. This will help potential investors to forecast market trends of the material. ····· 1036118472
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Wave Power: how to produce clean electric energy from sea waves. Thousands of patents have been filed, hundreds of devices have been studied and tested in labs, and dozens of prototypes of Wave Energy Converters (WECs) have been deployed to the sea successfully harvesting wave energy. The main research work has been carried out for the oceans, the most relevant source of wave power. Closed seas, such as the Mediterranean Sea, have smaller energy availability, but they have a particular feature: short waves. Short waves have higher frequency and can activate a WEC in a very effective way. For instance, a WEC carrying a gyroscopic system produces electric power proportionally to the square of the wave frequency. Gyroscopic effects can keep a spinning top in a quasi vertical position, guide airplanes, stabilize ships and, with a slightly adjusted design and strategy, harvest energy from sea waves! ····· 1036118466
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Squeeze casting is a pressure casting process in which molten metal is solidified under the direct action of a pressure. In squeeze casting, the relationship between the process parameters and the quality of the squeeze cast components is not fully understood thus the need for more studies in this area of technology for better understanding of the process. The present work encompasses studying the effect of direct squeeze casting process parameters on the production of (3 and 20 ) volume fraction carbon fibers (CF) reinforced Al-Si matrix composites and 12 volume fraction graphite particles (GP) reinforced Al-Si matrix composites. The evaluated process parameters are squeeze pressure in the range (7.5-53) MPa, die preheating temperature (100,200,300)°C, pouring temperature (700,780)°C for the CF/Al-Si composites and (620,700,780)°C for the GP/Al-Si composites, squeeze time (30 sec.), and delay time (5 sec.). A detailed microstructure was examined for the two types of composites. Density, porosity, hardness, tensile strength and wear rate are also evaluated to reach the better combination of process parameters that give the better properties. ····· 1036118406
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Surface quality of polymers has gained attention for applications such as automotive, bioengineering and optics industries. Although scratch is one of the common phenomena in polymer application, little effort existed before the 1980s. With the recent establishment of the ASTM/ISO polymer scratch test standard, the systematic study of fundamental understanding of polymer scratch is possible. This work focuses on both experimental and numerical study of polymer scratch behaviors, with an emphasis on the mechanical understanding of the formation of scratch damage. Upon investigation of a broad range of polymers, various scratch damage features have been identified and correlated with the polymer mechanical properties. A generalized polymer scratch damage map is presented. The finite element method is also employed to analyze the stress-strain fields and deformation mechanisms. The phenomenological deduction of the scratch damage based on the stick-slip mechanism is established. This work makes it possible to establish the correlation between the scratch phenomena and material properties, thus providing the guidelines for the development of scratch resistant polymers. ····· 1036118254
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The evolution of 21st century has witnessed the revolutionary developments in the engineering materials. The innovations of advanced materials have been the mainstay of industrial exploitations. Foamed metals innovations are no doubt momentous wings of these exploitations. Hence the topic of relevance in this case will be the investigations of these metal foams. In this investigation, various experimentations regarding the properties of metal foams and their findings are studied. Various inferences are stated from the findings. Challenges among the processing methodolgies of metal foams and their solutions are also discussed. ····· 1036118249
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The results obtained from this work have shown that the high strength steel produced by thermomechanical treatment exhibited reduced corrosion rate than that those produced by hot rolling techniques. The degree of corrosion resistance varied from one cooling condition to another. The results correlate with obtained microstructures to a great extent. Also this work shows that the selection of the cooling process parameter should consider the corrosion factor as the rebars subjected to different treatments showed different general corrosion rates in the current test conditions. ····· 1036118243
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This study investigates opportunities and constraints in relation to the operation of marine Diesel engines in a dual fuel mode with diesel and hydrogen. Increasing costs of fuel place an additional burden on the marine industry and in some sectors, such as the fishing industry, the long term viability of ongoing operations at high fuel costs is no longer given. Indications are that it is possible to produce hydrogen at competitive costs from renewable energy sources, and approaches of how hydrogen can be used to reduce the fossil fuel requirements in the marine sector are identified. Findings presented in this book are the results of a research activity based at Lews Castle College, UHI, on the Isle of Lewis, Outer Hebrides of Scotland. ····· 1036118215
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The manifestations of life limiting phenomena in structural materials largely dictates the technological options which can be implemented in power plants. An understanding of these phenomena are therefore critical to set-up power plants based on sustainable technologies. This monograph compiles the research on the three phenomena that degrade the technological properties of steels used for thermal and nuclear power plants. It is therefore relevant to practicing engineers, material scientists and designers needing to know the effect of dynamic strain aging, ratcheting and creep on low alloyed and heat resistant steels used for pressure boundary applications in nuclear and thermal power plants. ····· 1036118157
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The current research done on the application of Multi-Agent technology for the flow of information between various departments within the organization. After highlighting the overall frame work for information sharing, it discusses about the development of agents in the form of autonomous software that concentrate on purchasing activities. Each agent is capable of communicating with other agents to share the information. The new features are designed against existing functions in purchasing activities which are running in current industries. SCM works within and out of the organization also . By concentrating this point in mind the software has designed in such way that both within and out of the organization users can utilize. ····· 1036118119
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Vehicle exterior aerodynamics directly influences the performance, safety as well as passenger comfort of a road vehicle. Of the various kinds of trailers that can be attached to a car, caravans are most frequently employed. Caravan towing can represent a significant part of the annual mileage, hence a detailed study of the flow structure of the car and caravan combination becomes inevitable. In this work, a steady three-dimensional simulation of the flow-field around a car-caravan combination with and without a drag reduction device has been carried out. Changes in the flow structure brought in by the attachment of a caravan to a car have been studied in detail. The flow phenomenon was investigated using the general-purpose commercially available CFD code Fluent . Conclusions are drawn based on the analysis and a drag reduction device was incorporated as a design modification. ····· 1036118106
für 12.95€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dieses Buch ist ein Tutorial für Autodesk® Inventor® 2013. Anhand eines komplexen Übungsbeispiels lernt der Leser den Umgang mit dem Programm. In kleinen, nachvollziehbaren Schritten werden Skizzen gezeichnet, Bauteile erzeugt und Baugruppen zusammengefügt.Kurze, prägnante Befehlsfolgen in Kombination mit übersichtlichen Grafiken ermöglichen ein schnelles, unkompliziertes Arbeiten. Der Leser erfährt nützliche Hinweise zum Umgang mit dem Programm und kann die Theorie in kleinen Schritten umsetzen.Die folgenden Bereiche werden in diesem Buch behandelt:Einzelbenutzer-Projekt erzeugen 2D- und 3D-Skizzen erstellen Geometrische Elemente zeichnen und bearbeiten 2D-Elemente mit Maßen und Abhängigkeiten versehen Arbeitselemente erzeugen 2D-Elemente in Volumen- und Flächenkörper konvertieren Volumenkörper bearbeiten, kopieren und anordnen Bauteile in Baugruppen einfügen und voneinander abhängig machen Vorhandene Bauteile austauschen Neue Bauteile aus Baugruppen heraus erzeugen Bauteile spiegeln, kopieren und modifizieren Baugruppen rendern ····· 1036114527
für 49.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Die Qualität der Notfallversorgung im Rettungsdienst ist durch den demografischen Wandel und einen zunehmenden Mangel an erfahrenen Notärzten gefährdet. Telematische Rettungsassistenzsysteme (TRAS) können hier zur Verbesserung der Versorgung vor Ort beitragen. Sie verbinden mithilfe der Telekommunikation einen zentral vorgehaltenen erfahrenen Telenotarzt mit dem Rettungsteam an der Einsatzstelle. Eine Online-Übertragung von Sprachdaten, Vitalparametern, Patientendokumentation, (bewegten) Bildern u. a. ermöglicht dem Telenotarzt eine realistische Einschätzung der Notfallsituation und eine gezielte logistische und medizinische Unterstützung des Teams vor Ort. Hierbei können Fehlfunktionen im TRAS allerdings schwerwiegende Folgen für den Patienten haben. Derzeit gibt es noch keine Methodik, um diese technikbedingten Produktrisiken von TRAS zu reduzieren.Gegenstand der Arbeit ist die Entwicklung und Erprobung einer Methodik zur Reduktion dieser Risiken. Aufbauend auf einer Untersuchung der Teilsysteme eines TRAS und ihrer Wechselwirkungen werden die technikbedingten Produktrisiken identifiziert, bewertet, priorisiert und schließlich reduziert. Der Nachweis der Anwendbarkeit der Methodik wurde durch eine Erprobung innerhalb des BMWi-geförderten Forschungsprojekts Med-on-@ix erbracht. In naher Zukunft dürften zuverlässige TRAS ein wichtiger Baustein in der kontinuierlichen Verbesserung und Sicherstellung der präklinischen Notfallversorgung in Deutschland sein. ····· 1036114473
für 62.01€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Monografiya posvyashchena probleme sozdaniya analiticheskogo kompleksa nauchno-programmnykh sredstv issledovaniya kachestva i nadezhnosti sistemy elektrooborudovaniya sovremennykh avtomobiley v ekspluatatsionnyy period zhiznennogo tsikla. V rabote predstavleny matematicheskie i imitatsionnye modeli osnovnykh komponentov sistemy elektrooborudovaniya avtomobiley. V ramkakh sozdaniya analiticheskogo kompleksa, provedena razrabotka i realizatsiya instrumentov vskrytiya klyuchevykh problem kachestva, ranzhirovaniya po vesomosti ikh vliyaniya na bezotkaznost` i remontoprigodnost`, a takzhe prognozirovaniya pokazateley kachestva sovremennykh avtomobiley pri vnedrenii meropriyatiy po uluchsheniyu nadezhnosti sistemy elektrooborudovaniya. Rabota predstavlyaet interes dlya analitikov, inzhenerov, a takzhe spetsialistov zanimayushchikhsya resheniem problem v oblasti upravleniya kachestvom i nadezhnost`yu slozhnykh tekhnicheskikh sistem i v pervuyu ochered` v avtomobilestroenii. ····· 103615357
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray V monografii dana klassifikatsiya ftorsoderzhashchikh ingibitorov iznashivaniya po kriteriyam molekulyarnoy massy i strukturnogo urovnya organizatsii. Pokazana tselesoobraznost` i effektivnost` podkhoda k sozdaniyu ftorsoderzhashchikh tribokompozitov, optimizirovannykh na molekulyarnom, nadmolekulyarnom, nano- i makrofaznom urovnyakh, opredelyayushchikh mekhanizmy razrusheniya, treniya i iznashivaniya. Razrabotany effektivnye napravleniya sozdaniya tribotekhnicheskikh materialov na osnove ftorsoderzhashchikh matrits razlichnoy molekulyarnoy massy i stroeniya, osnovannye na upravlenii mekhanizmom i kinetikoy tribokhimicheskikh, teplofizicheskikh, deformatsionnykh i drugikh kontaktnykh protsessov. Osushchestvlena aprobatsiya razrabotok v uzlakh treniya avtotraktornoy tekhniki, germetiziruyushchikh ustroystv i tekhnologicheskoy osnastki. Monografiya prednaznachena dlya spetsialistov v oblasti tribotekhnicheskogo materialovedeniya, budet polezna studentam, magistrantam i aspirantam, spetsializiruyushchimsya v oblasti materialovedeniya i tekhnologii materialov. ····· 103615280
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