Download or read book Characterization of Terahertz Emission from High Resistivity Fe doped Bulk Ga0 69In0 31As Based Photoconducting Antennas written by Suranjana Sengupta and published by Springer Science & Business Media. This book was released on 2011-06-07 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terahertz science and technology is attracting great interest due to its application in a wide array of fields made possible by the development of new and improved terahertz radiation sources and detectors. This book focuses on the development and characterization of one such source - namely the semi-large aperture photoconducting (PC) antenna fabricated on Fe-doped bulk Ga0.69In0.31As substrate. The high ultrafast carrier mobility, high resistivity, and subpicosecond carrier lifetime along with low bandgap make Ga0.69In0.31As an excellent candidate for PC antenna based THz emitter that can be photoexcited by compact Yb-based multiwatt laser systems for high power THz emission. The research is aimed at evaluating the impact of physical properties of a semi-large aperture Ga0.69In0.31As PC antenna upon its THz generation efficiency, and is motivated by the ultimate goal of developing a high-power terahertz radiation source for time-domain terahertz spectroscopy and imaging systems.
Download or read book 15th Nordic Baltic Conference on Biomedical Engineering and Medical Physics written by Kim Dremstrup and published by Springer Science & Business Media. This book was released on 2011-06-17 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the Proceedings of the 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics. NBC 2011 brought together science, education and business under the motto “Cooperation for health”. The topics covered by the Conference Proceedings include: Imaging, Biomechanics, Neural engineering, Sport Science, Cardio-pulmonary engineering, Medical Informatics, Ultrasound, Assistive Technology, Telemedicine, and General Biomedical Engineering.
Download or read book Adaptive and Natural Computing Algorithms written by Andrej Dobnikar and published by Springer. This book was released on 2011-04-09 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The two-volume set LNCS 6593 and 6594 constitutes the refereed proceedings of the 10th International Conference on Adaptive and Natural Computing Algorithms, ICANNGA 2010, held in Ljubljana, Slovenia, in April 2010. The 83 revised full papers presented were carefully reviewed and selected from a total of 144 submissions. The first volume includes 42 papers and a plenary lecture and is organized in topical sections on neural networks and evolutionary computation.
Download or read book A Cultural Historical Perspective on Mathematics Teaching and Learning written by Wolff-Michael Roth and published by Springer Science & Business Media. This book was released on 2011-11-22 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eighty years ago, L. S. Vygotsky complained that psychology was misled in studying thought independent of emotion. This situation has not significantly changed, as most learning scientists continue to study cognition independent of emotion. In this book, the authors use cultural-historical activity theory as a perspective to investigate cognition, emotion, learning, and teaching in mathematics. Drawing on data from a longitudinal research program about the teaching and learning of algebra in elementary schools, Roth and Radford show (a) how emotions are reproduced and transformed in and through activity and (b) that in assessments of students about their progress in the activity, cognitive and emotional dimensions cannot be separated. Three features are salient in the analyses: (a) the irreducible connection between emotion and cognition mediates teacher-student interactions; (b) the zone of proximal development is itself a historical and cultural emergent product of joint teacher-students activity; and (c) as an outcome of joint activity, the object/motive of activity emerges as the real outcome of the learning activity. The authors use these results to propose (a) a different conceptualization of the zone of proximal development, (b) activity theory as an alternative to learning as individual/social construction, and (c) a way of understanding the material/ideal nature of objects in activity. Wolff-Michael Roth is Lansdowne Professor at the University of Victoria, Canada. He researches scientific and mathematical cognition along the life span from cultural-historical and phenomenological perspectives. He has conducted research in science and mathematics classrooms as well as having realized multi-year ethnographic studies of science and mathematics in workplaces and scientific research. Luis Radford is full professor at Laurentian University in Canada. His research interests include the investigation of mathematics thinking and knowing from a cultural-semiotic embodied perspective and the historical and cultural roots of cognition. For many years he has been conducting classroom research with primary and high-school teachers about the teaching and learning of mathematics.
Download or read book Activity Recognition in Pervasive Intelligent Environments written by Liming Chen and published by Atlantis Press. This book was released on 2011-05-12 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book consists of a number of chapters addressing different aspects of activity recognition, roughly in three main categories of topics. The first topic will be focused on activity modeling, representation and reasoning using mathematical models, knowledge representation formalisms and AI techniques. The second topic will concentrate on activity recognition methods and algorithms. Apart from traditional methods based on data mining and machine learning, we are particularly interested in novel approaches, such as the ontology-based approach, that facilitate data integration, sharing and automatic/automated processing. In the third topic we intend to cover novel architectures and frameworks for activity recognition, which are scalable and applicable to large scale distributed dynamic environments. In addition, this topic will also include the underpinning technological infrastructure, i.e. tools and APIs, that supports function/capability sharing and reuse, and rapid development and deployment of technological solutions. The fourth category of topic will be dedicated to representative applications of activity recognition in intelligent environments, which address the life cycle of activity recognition and their use for novel functions of the end-user systems with comprehensive implementation, prototyping and evaluation. This will include a wide range of application scenarios, such as smart homes, intelligent conference venues and cars.
Download or read book A CMOS Self Powered Front End Architecture for Subcutaneous Event Detector Devices written by Jordi Colomer-Farrarons and published by Springer Science & Business Media. This book was released on 2011-02-17 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: A CMOS Self-Powered Front-End Architecture for Subcutaneous Event-Detector Devices presents the conception and prototype realization of a Self-Powered architecture for subcutaneous detector devices. The architecture is designed to work as a true/false (event detector) or threshold level alarm of some substances, ions, etc... that are detected through a three-electrodes amperometric BioSensor approach. The device is envisaged as a Low-Power subcutaneous implantable application powered by an inductive link, one emitter antenna at the external side of the skin and the receiver antenna under the skin. The sensor is controlled with a Potentiostat circuit and then, a post-processing unit detects the desired levels and activates the transmission via a backscattering method by the inductive link. All the instrumentation, except the power module, is implemented in the so called BioChip. Following the idea of the powering link to harvest energy of the magnetic induced link at the implanted device, a Multi-Harvesting Power Chip (MHPC) has been also designed.
Download or read book A Basis Theory Primer written by Christopher Heil and published by Springer Science & Business Media. This book was released on 2011 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook is a self-contained introduction to the abstract theory of bases and redundant frame expansions and their use in both applied and classical harmonic analysis. The four parts of the text take the reader from classical functional analysis and basis theory to modern time-frequency and wavelet theory. Extensive exercises complement the text and provide opportunities for learning-by-doing, making the text suitable for graduate-level courses. The self-contained presentation with clear proofs is accessible to graduate students, pure and applied mathematicians, and engineers interested in the mathematical underpinnings of applications.
Download or read book A Feature Centric View of Information Retrieval written by Donald Metzler and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercial Web search engines such as Google, Yahoo, and Bing are used every day by millions of people across the globe. With their ever-growing refinement and usage, it has become increasingly difficult for academic researchers to keep up with the collection sizes and other critical research issues related to Web search, which has created a divide between the information retrieval research being done within academia and industry. Such large collections pose a new set of challenges for information retrieval researchers. In this work, Metzler describes highly effective information retrieval models for both smaller, classical data sets, and larger Web collections. In a shift away from heuristic, hand-tuned ranking functions and complex probabilistic models, he presents feature-based retrieval models. The Markov random field model he details goes beyond the traditional yet ill-suited bag of words assumption in two ways. First, the model can easily exploit various types of dependencies that exist between query terms, eliminating the term independence assumption that often accompanies bag of words models. Second, arbitrary textual or non-textual features can be used within the model. As he shows, combining term dependencies and arbitrary features results in a very robust, powerful retrieval model. In addition, he describes several extensions, such as an automatic feature selection algorithm and a query expansion framework. The resulting model and extensions provide a flexible framework for highly effective retrieval across a wide range of tasks and data sets. A Feature-Centric View of Information Retrieval provides graduate students, as well as academic and industrial researchers in the fields of information retrieval and Web search with a modern perspective on information retrieval modeling and Web searches.
Download or read book A Clumsy Encounter written by Claire Penketh and published by Springer Science & Business Media. This book was released on 2011-11-16 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Clumsy Encounter offers an interrogation of inclusive education by exploring the point at which dyspraxia and drawing from observation meet within formal learning environments. Drawing on stories of individual experience, this book seeks to promote the interrogation of implicit educational practices. Here the complexity of observational drawing is examined not within a closed community of art education but within the social and cultural domain of other critical debates within education, specifically those related to inclusion. Pupils do not experience inclusion and exclusion in the abstract but through discipline-based and situated practices. This book aims to explore this complexity and disrupt approaches that might seek to rationalise and compartmentalise educational experience. A Clumsy Encounter reflects a cross-disciplinary perspective and will be of interest to academics, professionals and practitioners interested in the nature, role and value of art education as well as those with a particular interest in dyspraxia. It will also be of particular relevance to those concerned with hearing the voices of pupil experience of inclusive and exclusive educational practices.
Download or read book A Hybrid Deliberative Layer for Robotic Agents written by Ronny Hartanto and published by Springer. This book was released on 2011-07-18 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Hybrid Deliberative Layer (HDL) solves the problem that an intelligent agent faces in dealing with a large amount of information which may or may not be useful in generating a plan to achieve a goal. The information, that an agent may need, is acquired and stored in the DL model. Thus, the HDL is used as the main knowledge base system for the agent. In this work, a novel approach which amalgamates Description Logic (DL) reasoning with Hierarchical Task Network (HTN) planning is introduced. An analysis of the performance of the approach has been conducted and the results show that this approach yields significantly smaller planning problem descriptions than those generated by current representations in HTN planning.
Download or read book Adaptive Multimodal Interactive Systems written by Matthias Bezold and published by Springer Science & Business Media. This book was released on 2011-07-12 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adaptive Multimodal Interactive Systems introduces a general framework for adapting multimodal interactive systems and comprises a detailed discussion of each of the steps required for adaptation. This book also investigates how interactive systems may be improved in terms of usability and user friendliness while describing the exhaustive user tests employed to evaluate the presented approaches. After introducing general theory, a generic approach for user modeling in interactive systems is presented, ranging from an observation of basic events to a description of higher-level user behavior. Adaptations are presented as a set of patterns similar to those known from software or usability engineering.These patterns describe recurring problems and present proven solutions. The authors include a discussion on when and how to employ patterns and provide guidance to the system designer who wants to add adaptivity to interactive systems. In addition to these patterns, the book introduces an adaptation framework, which exhibits an abstraction layer using Semantic Web technology.Adaptations are implemented on top of this abstraction layer by creating a semantic representation of the adaptation patterns. The patterns cover both graphical interfaces as well as speech-based and multimodal interactive systems.
Download or read book A Life Course Perspective on Migration and Integration written by Matthias Wingens and published by Springer Science & Business Media. This book was released on 2011-07-14 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last four decades the sociological life course approach with its focus on the interplay of structure and agency over time life course perspective has become an important research perspective in the social sciences. Yet, while it has successfully been applied to almost all fields of social inquiry it is much less used in research studying migrant populations and their integration patterns. This is puzzling since understanding immigrants’ integration requires just the kind of dynamic research approach this approach puts forward: any integration theory actually refers to life course processes. This volume shows fruitful cross-linkages between the two research traditions. A range of studies are presented that all apply sociological life course concepts to research on migrants and migrant groups in Europe. The book is organized thematically, indicating different important domains in the life course. Using a wide variety of methodological approaches, it covers both quantitative studies based on population census data and survey material as well as qualitative studies based on interviews. Attention is paid to the life courses of those who migrated themselves as well as their offspring. The studies cover different European countries, relating to one national context or a particular local setting in a city as well as cross-country comparisons. Overall the book shows that applying the sociological life course approach to migration and integration research may advance our understanding of immigrant settlement patterns as well as further develop the life course perspective
