Digital Geometry Klette, Reinhard; Rosenfeld, Azriel
2004, 2004-09-04
eBook
Digital geometry is about deriving geometric information from digital pictures. The field emerged from its mathematical roots some forty-years ago through work in computer-based imaging, and it is ...used today in many fields, such as digital image processing and analysis (with applications in medical imaging, pattern recognition, and robotics) and of course computer graphics. Digital Geometry is the first book to detail the concepts, algorithms, and practices of the discipline. This comphrehensive text and reference provides an introduction to the mathematical foundations of digital geometry, some of which date back to ancient times, and also discusses the key processes involved, such as geometric algorithms as well as operations on pictures. *A comprehensive text and reference written by pioneers in digital geometry, image processing and analysis, and computer vision *Provides a collection of state-of-the-art algorithms for a wide variety of geometrical picture analysis tasks, including extracting data from digital images and making geometric measurements on the data *Includes exercises, examples, and references to related or more advanced work.
An overview of the art historical antecedents to virtual reality and the impact of virtual reality on contemporary conceptions of art.
Although many people view virtual reality as a totally new ...phenomenon, it has its foundations in an unrecognized history of immersive images. Indeed, the search for illusionary visual space can be traced back to antiquity. In this book, Oliver Grau shows how virtual art fits into the art history of illusion and immersion. He describes the metamorphosis of the concepts of art and the image and relates those concepts to interactive art, interface design, agents, telepresence, and image evolution. Grau retells art history as media history, helping us to understand the phenomenon of virtual reality beyond the hype.
Grau shows how each epoch used the technical means available to produce maximum illusion. He discusses frescoes such as those in the Villa dei Misteri in Pompeii and the gardens of the Villa Livia near Primaporta, Renaissance and Baroque illusion spaces, and panoramas, which were the most developed form of illusion achieved through traditional methods of painting and the mass image medium before film. Through a detailed analysis of perhaps the most important German panorama, Anton von Werner's 1883 The Battle of Sedan, Grau shows how immersion produced emotional responses. He traces immersive cinema through Cinerama, Sensorama, Expanded Cinema, 3-D, Omnimax and IMAX, and the head mounted display with its military origins. He also examines those characteristics of virtual reality that distinguish it from earlier forms of illusionary art.
His analysis draws on the work of contemporary artists and groups ART+COM, Maurice Benayoun, Charlotte Davies, Monika Fleischmann, Ken Goldberg, Agnes Hegedues, Eduardo Kac, Knowbotic Research, Laurent Mignonneau, Michael Naimark, Simon Penny, Daniela Plewe, Paul Sermon, Jeffrey Shaw, Karl Sims, Christa Sommerer, and Wolfgang Strauss. Grau offers not just a history of illusionary space but also a theoretical framework for analyzing its phenomenologies, functions, and strategies throughout history and into the future.
5,10,15,20-tetrakis(4-carboxylphenyl)-porphyrin functionalized NiCo2S4 yolk-shell nanospheres (Por-NiCo2S4) with excellent peroxidase activity, ascribed to the synergistic effect between superoxide ...free radicals (O2−) and of holes (h+). A fast cascade reaction sensing platform on the basis of Por-NiCo2S4 has been constructed to quantitatively determine cholesterol concentration in human serums.
Display omitted
•The as-prepared Por-NiCo2S4 yolk-shell nanospheres possessed the excellent peroxidase-like activity.•The Por-NiCo2S4 yolk-shell nanospheres catalyzed the oxidation of TMB by H2O2 in less than 10 s.•The Por-NiCo2S4 yolk-shell nanospheres were used to detect H2O2 and cholesterol with a very low detection limit.•● The colorimetric sensor possessed superior sensitivity and selectivity for total cholesterol in serum samples.
5,10,15,20-tetrakis (4-carboxylphenyl) porphyrin functionalized NiCo2S4 yolk-shell nanospheres (Por-NiCo2S4) were fabricated by a facile and efficient solvothermal strategy and demonstrated to possess excellent peroxidase-like activity. Compared with pure NiCo2S4 nanospheres, Por-NiCo2S4 exhibits the superior peroxidase activity, which was evaluated by the fast oxidation of 3,3′,5,5′-tetramethylbenzidine (a chromogenic substrate, TMB) by H2O2 to form the blue product (oxTMB) only in 10 s. The systematic studies including radical scavenger, fluorescence probe, and electrochemical experiments confirm that superoxide free radicals (O2−) play a key role in catalytic reactions, in addition to the synergistic effect of holes (h+). Based on the developed peroxidase activity of Por-NiCo2S4, and combined with cholesterol oxidase (Chox), a fast cascade reaction sensing platform has been constructed to quantitatively determination cholesterol in a wide linear range of 0.1−9.0 mM with the detection limit of 19.36 μM. The Por-NiCo2S4 based colorimetric biosensing platform has been used for determining the levels of total cholesterol in serum samples, indicating Por-NiCo2S4 is expected to be used as the promising materials for fast visual colorimetry in clinical medical detection.
Moving Objects Databases is the first uniform treatment of moving objects databases, the technology that supports GPS and RFID. It focuses on the modeling and design of data from moving objects — ...such as people, animals, vehicles, hurricanes, forest fires, oil spills, armies, or other objects — as well as the storage, retrieval, and querying of that very voluminous data.It includes homework assignments at the end of each chapter, exercises throughout the text that students can complete as they read, and a solutions manual in the back of the book.This book is intended for graduate or advanced undergraduate students. It is also recommended for computer scientists and database systems engineers and programmers in government, industry and academia; professionals from other disciplines, e.g., geography, geology, soil science, hydrology, urban and regional planning, mobile computing, bioterrorism and homeland security, etc.Focuses on the modeling and design of data from moving objects--such as people, animals, vehicles, hurricanes, forest fires, oil spills, armies, or other objects--as well as the storage, retrieval, and querying of that very voluminous data.Demonstrates through many practical examples and illustrations how new concepts and techniques are used to integrate time and space in database applications.Provides exercises and solutions in each chapter to enable the reader to explore recent research results in practice.
