The crossing number of a graph is the minimum number of edge crossings in any drawing of the graph into the plane. This very basic property has been studied extensively in the literature from a theoretic point of view...
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Recent studies have shown that through a careful combination of multiple sensory channels, so called multisensory binding effects can be achieved that can be beneficial for collision detection and texture recognition ...
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ISBN:
(纸本)1595933212
Recent studies have shown that through a careful combination of multiple sensory channels, so called multisensory binding effects can be achieved that can be beneficial for collision detection and texture recognition feedback. During the design of a new pen-input device called Tactylus, specific focus was put on exploring multisensory effects of audiotactile cues to create a new, but effective way to interact in virtual environments with the purpose to overcome several of the problems noticed in current devices. Copyright 2006 ACM.
It has long been known that ancient temples were frequently oriented along the cardinal directions or to certain points along the horizon where the Sun or the Moon rises or sets on special days of the year. In the las...
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It has long been known that ancient temples were frequently oriented along the cardinal directions or to certain points along the horizon where the Sun or the Moon rises or sets on special days of the year. In the last decades, archaeologists have found evidence of even older building structures buried in the soil, with doorways that also appear to have distinct *** paper presents a novel diagram combining archaeological maps with a folded-apart, flattened view of the whole sky, showing the local horizon and the daily paths of the Sun, Moon and brighter stars. By use of this diagram, interesting groupings of astronomical orientation directions, for example, to certain sunrise and sunset points could be identified, which were evidently used to mark certain days of the year. Orientations towards rising and setting points of a few significant stars very likely indicated the beginning of the agricultural year in the middle neolithic period.
After an introduction to related research in the field of spatial coating layer formation, a new analysis method, based on a fully automated microtomy process and light microscopy combined with advanced image analysis...
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After an introduction to related research in the field of spatial coating layer formation, a new analysis method, based on a fully automated microtomy process and light microscopy combined with advanced image analysis algorithms, is presented. The concept offers both, a high spatial resolution and a significantly larger sample size than conventional SEM techniques. The concept is based on a light microscope which is attached to a rotary microtome. An embedded paper sample is digitized by means of serial sectioning. Repeatedly, slices are cut off the embedded paper sample and the cut block surface is scanned fully automated. Image analysis software was developed to automatically detect the coating layer. Segmentation of the coating layer is realized by a 3D color segmentation process in the RGB color space instead of a threshold based algorithm. The approach itself is a three-dimensional concept, meaning that for the detection of the coating layer in one slice image also data from the neighboring slices is incorporated. Thus, the algorithm delivers both, detailed and robust coating layer recognition. Single coated LWC papers from a pilot coater were analyzed to compare coating layer formation for blade and curtain coating. Local correlation was used to study the relation between the obtained thickness and topography values of the base paper and the coating layers for both coating methods. The results showed, as expected, in tendency a leveling coat behavior for blade coating and a contour coat behavior for curtain coating. However, especially the curtain coated sample, but also the blade coated sample, was away from the idealized characteristics of a contour or a leveling coat respectively. Studies regarding the effect of calendering on these samples showed that calendering predominantly influences the base sheet topography under the coating layer with a less pronounced effect on the coating layer thickness.
In this paper, a new approach named focal region-based volume rendering for visualizing internal structures of volumetric data is presented. This approach presents volumetric information through integrating context in...
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In this paper we present a novel embedded platform, dedicated especially to the surveillance of remote locations under harsh environmental conditions, featuring various video and audio compression algorithms as well a...
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The shape of a NURBS curve or surface is defined by the location of its control points, the control points' weights, and the knot vectors. Most of the curve and surface design tried to modify the control points. H...
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ISBN:
(纸本)0769526063
The shape of a NURBS curve or surface is defined by the location of its control points, the control points' weights, and the knot vectors. Most of the curve and surface design tried to modify the control points. However, it is still impossible to obtained accurate control points for a reconstructed NURBS curve or surface. The fitness of these surfaces is generally considered a subjective notion depending on the judgment of the designers (eg. visually pleasing, devoid of unnecessary bumps or wiggles, satisfying certain continuity requirements). One of the restriction in ship hull design is that the existing details of a ship design on paper or a ship that already been constructed physically couldn't be reconstructed accurately and concisely in a ship hull design software. This research strives to solve this problem by creating fair ship hull surface using NURBS. An optimized NURBS ship hull fitting approach using simulated annealing is developed. Evaluation and analysis (accuracy, fairness and speed of processing) on the proposed approach is done.
The need for high performance computing continues to grow in the coming years. Such needs are no longer limited to highly advanced scientific organizations. Today, many educational and business communities also desire...
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The need for high performance computing continues to grow in the coming years. Such needs are no longer limited to highly advanced scientific organizations. Today, many educational and business communities also desire high computational power to expand their activities and maintain their services. However, the high cost of a single supercomputer with massive multi-processing power makes them infeasible for many such users. An alternative approach to high performance computing is computer clustering, which provides practical and feasible infrastructure to accommodate high computational power. The key concept in computer clustering is to unify available computing resources. Recently, many different organizations, including corporations and universities, have been implementing the cluster computing. Consequently, learning and understanding the basics of cluster computing can be considered as a valuable academic investment for IT and technology students. The main purpose of this paper is to present a practical demonstration of computer clustering. We introduce a simple and easy-to-use Windows-based graphical software toolkit, called Paloma (Parallel Local Message-passing Adaptor), which was developed by Advanced Internet technology Lab at CCSU. Paloma allows students to easily create a computer cluster using multiple PCs interconnected to each other via LAN or Ethernet. Through Paloma's integrated GUI and its performance monitoring capacity, the students will understand the motivation for high performance computing, advantages of computer clustering, as well as, the challenges and limitations of a cluster system. Flexibility of Paloma allows students to use it outside the classroom environment and develop their own what-if scenarios. In this paper we describe a number of test cases for laboratory experiments, which appeared to be very attractive to our students. Furthermore, we discuss possible extensions to these demonstrations and briefly outline our future plans for
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