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Large-Area Industrial-Scale Identification and Quality Control of Graphene

MRS Online Proceedings Library 2011年第1期1344卷 1-6页

作者： Craig M. Nolen Giovanni Denina Desalegne Teweldebrhan Bir Bhanu Alexander A. Balandin Nano-Device Laboratory Department of Electrical Engineering and Materials Science and Engineering Program Bourns College of Engineering University of California – Riverside Riverside USA Visualization and Intelligent Systems Laboratory Department of Electrical Engineering Bourns College of Engineering University of California – Riverside Riverside USA

A large-area graphene layer identification technique was developed for research and industrial applications. It is based on the analysis of optical microscopy images using computational image processing algorithms. The initial calibration is performed with the micro-Raman spectroscopy. The method can be applied to the wafer-scale graphene samples. The technique has the potential to be the gateway in the development of fully automated statistical process control methods for the next generation thin-film materials used by the semiconductor industry. The proposed technique can be applied to graphene on arbitrary substrates and used for other atomically thin materials.

关键词： electronic material optical properties layered

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A novel way to conduct human studies and do some good

A novel way to conduct human studies and do some good

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28th Annual CHI Conference on Human Factors in Computing Systems, CHI 2010

作者： Buddharaju, Pradeep Fujiki, Yuichi Pavlidis, Ioannis Akleman, Ergun Dept. of Computer Science University of Houston Houston TX 77204 United States Visualization Sciences Program Texas A and M University College Station TX 77843 United States

ISBN: (纸本)9781605589312

In this paper the authors describe a novel way to conduct large-scale human studies achieving the maximum outreach and impact with the minimum cost. An iPhone health application, 'Walk n' Play', was developed and released for free in the App Store. The application measures calories spent due to walking activities through the iPhone's accelerometer. It is a real-time awareness tool that helps people to keep their sedentariness in check. Furthermore, it uses motivational mechanisms based on buddy support/competition and social networking to increase daily physical activity. The anonymous data gathered from thousands of users around the world, reveal patterns of human behavior at a resolution and scale not feasible before. © 2010 Copyright is held by the author/owner(s).

关键词： Smartphones

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An optical technique for the large-scale graphene recognition and quality control

An optical technique for the large-scale graphene recognitio...

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Frontiers in Optics, FiO 2010

作者： Nolen, Craig M. Teweldebrhan, Desalegne Denina, Giovanni Bhanu, Bir Balandin, Alexander A. Nano-Device Laboratory Department of Electrical Engineering and Materials Science and Engineering Program Bourns College of Engineering University of California-Riverside Riverside CA 92521 United States Visualization and Intelligent Systems Laboratory Department of Electrical Engineering and Materials Science and Engineering Program Bourns College of Engineering University of California-Riverside Riverside CA 92521 United States

We describe a fast and efficient method for recognition and quality control of the largearea graphene layers based on image processing algorithms. Results show that our technique is accurate and has potential for indu... 详细信息

关键词： Quality control

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Ecological research can augment restoration practice in urban areas degraded by invasive species-examples from Chicago Wilderness

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Urban Ecosystems 2009年第1期12卷 63-77页

作者： Heneghan, Liam Umek, Lauren Bernau, Brad Grady, Kevin Iatropulos, Jamie Jabon, David Workman, Margaret Environmental Science Program DePaul University Chicago IL 60614 2325 North Clifton Avenue United States Scientific Data Analysis and Visualization Program DePaul University Chicago United States

Urban biodiversity conservation needs a firm scientific foundation, one that draws upon active and regionally calibrated research programs. Until recently this foundation has not existed. In this paper we examine the way in which the emerging discipline of restoration ecology in an urban context can learn from the experiences of ongoing restoration projects and in turn how novel insights from research of urban soils can help these projects define and reach their goals. Limitations on collaboration between academic researchers and practitioners continues be problematic. We discuss a model whereby this impediment may be removed. A case study of Rhamnus cathartica, an invader of Midwestern woodlands which modifies some important soil ecosystem properties will be used to illustrate the potential for engagement between research and practice. © 2008 Springer science+Business Media, LLC.

关键词： Buckthorn Ecology and management Interdisciplinary research Invasive species Restoration Rhamnus cathartica Soil restoration Urban ecology

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Cataclysmic Variables and Other Compact Binaries in the Globular Cluster NGC 362: Candidates from Chandra and HST

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AIP Conference Proceedings 2010年第1期1314卷 163-168页

作者： B. Margon B. Beck‐Winchatz L. Homer D. Pooley C. G. Bassa S. F. Anderson W. H. G. Lewin F. Verbunt A. K. H. Kong R. M. Plotkin aDepartment of Astronomy & Astrophysics University of California Santa Cruz CA 95064 USA bScientific Data Analysis and Visualization Program DePaul University Chicago IL 60614 USA cDepartment of Astronomy University of Washington Box 351580 Seattle WA 98195 USA dEureka Scientific 5248 Valley View Road El Sobrante CA 94803 USA eJodrell Bank Centre for Astrophysics School of Physics and Astronomy University of Manchester Manchester M13 9PL UK fKavli Institute for Astrophysics and Space Research Massachusetts Institute of Technology Cambridge MA 02139 USA gAstronomical Institute Utrecht University PO Box 80000 3508 TA Utrecht The Netherlands hInstitute of Astronomy and Department of Physics National Tsing Hua University Hsinchu 30013 Taiwan iAstronomical Institute “Anton Pannekoek ” University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands

Highly sensitive and precise X‐ray imaging from Chandra, combined with the superb spatial resolution of HST optical images, dramatically enhances our empirical understanding of compact binaries such as cataclysmic variables and low mass X‐ray binaries, their progeny, and other stellar X‐ray source populations deep into the cores of globular clusters. Our Chandra X‐ray images of the globular cluster NGC 362 reveal 100 X‐ray sources, the bulk of which are likely cluster members. Using HST color‐magnitude and color‐color diagrams, we quantitatively consider the optical content of the NGC 362 Chandra X‐ray error circles, especially to assess and identify the compact binary population in this condensed‐core globular cluster. Despite residual significant crowding in both X‐rays and optical, we identify an excess population of Hα‐emitting objects that is statistically associated with the Chandra X‐ray sources. The X‐ray and optical characteristics suggest that these are mainly cataclysmic variables, but we also identify a candidate quiescent low mass X‐ray binary. A potentially interesting and largely unanticipated use of observations such as these may be to help constrain the macroscopic dynamic state of globular clusters.

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Automatic beam path analysis of laser wakefield particle acceleration data

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Computational science and Discovery 2009年第1期2卷

作者： Rübel, Oliver Geddes, Cameron G R. Cormier-Michel, Estelle Wu, Kesheng Prabhat Weber, Gunther H. Ushizima, Daniela M. Messmer, Peter Hagen, Hans Hamann, Bernd Bethel, Wes Computational Research Division Lawrence Berkeley National Laboratory Berkeley CA 94720 One Cyclotron Road United States 'Visualization of Large and Unstructured Data Sets - Applic. in Geospatial Plan. Modeling and Eng. 'Technische Universität Kaiserslautern D-67653 Kaiserslautern Erwin-Schrödinger-Straße Germany Institute for Data Analysis and Visualization (IDAV) Department of Computer Science University of California Davis CA 95616 Davis One Shields Avenue United States LOASIS Program of Lawrence Berkeley National Laboratory Berkeley CA 94720 One Cyclotron Road United States Tech-X Corporation Boulder CO 80303 5621 Arapahoe Avenue United States

Numerical simulations of laser wakefield particle accelerators play a key role in the understanding of the complex acceleration process and in the design of expensive experimental facilities. As the size and complexity of simulation output grows, an increasingly acute challenge is the practical need for computational techniques that aid in scientific knowledge discovery. To that end, we present a set of data-understanding algorithms that work in concert in a pipeline fashion to automatically locate and analyze high-energy particle bunches undergoing acceleration in very large simulation datasets. These techniques work cooperatively by first identifying features of interest in individual timesteps, then integrating features across timesteps, and based on the information-derived perform analysis of temporally dynamic features. This combination of techniques supports accurate detection of particle beams enabling a deeper level of scientific understanding of physical phenomena than has been possible before. By combining efficient data analysis algorithms and state-of-the-art data management we enable high-performance analysis of extremely large particle datasets in 3D. We demonstrate the usefulness of our methods for a variety of 2D and 3D datasets and discuss the performance of our analysis pipeline. © 2009 IOP Publishing Ltd.

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Regular Mesh Construction Algorithms using Regular Handles

Regular Mesh Construction Algorithms using Regular Handles

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International Conference on Shape Modeling and Applications

作者： E. Akleman Jianer Chen Visualization Sciences Program Department of Architecture Texas A and M University College Station TX USA Department of Computer Science Texas A and M University College Station TX USA

This paper presents our recent theoretical results on high genus modeling. We introduce a new concept called regular handles. Using regular handles it is possible to increase genus without increasing the number of vertices. Using regular handles a wide variety of mesh structures can be constructed. One of the usages of regular handles is to construct families of regular meshes, which is useful to create a wide variety of high genus mesh structures

关键词： visualization Computer architecture Computer science Solids Shape

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Regular meshes 05

Regular meshes

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SPM 2005 - ACM Symposium on Solid and Physical Modeling

作者： Akleman, Ergun Chen, Jianer Visualization Sciences Program Texas A and M University Computer Science Department Texas A and M University Visualization Sciences Program Department of Architecture College of Architecture 418 Langford Center C College Station TX 77843-3137

ISBN: (纸本)9781595930156

This paper presents our preliminary results on regular meshes in which all faces have the same size and all vertices have the same valence. A regular mesh is denoted by (n, m, g) where n is the number of the sides of faces, m is the valence of vertices and g is the genus of the mesh. For g = 0, regular meshes include regular platonic solids, all two sided polygons. For g = 1 regular meshes include regular tilings of infinite plane. Our work shows that there exist infinitely many regular meshes for g > 1. Moreover, we have constructive proofs that describe how to create high genus regular meshes that consist of triangles and quadrilaterals (3,m,g) and (4,m,g). Copyright © 2005 by the Association for Computing Machinery, Inc.

关键词： Image segmentation

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Local mesh operators: extrusions revisited

Local mesh operators: extrusions revisited

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International Conference on Shape Modeling and Applications

作者： E. Landreneau E. Akleman Vinod Srinivasan Computer Science Department USA Visualization Sciences Program Texas A and M University USA

In this paper, we present a set of generalized "local" mesh operators. Local operators are those that operate on a single face without affecting the rest of the mesh. Boundary edges of the chosen face also stay the same. We have identified two types of local operators: (1) Extrusions that create generalized pipes in which bottom and top polygons have the same number of sides, and (2) Stellations that create generalized pyramids, where there is a top vertex instead of top polygon. Our operators can create extrusions that are regular polyhedra including dodecahedron, icosa-hedron, octahedron and tetrahedron. The tetrahedron is created using the stellation operator, which is also useful to create generalized versions of Kepler and Poinsot solids.

关键词： visualization Solids Shape Computer science Application software

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Gesture and response in field-based performance

Gesture and response in field-based performance

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Creativity and Cognition Proceedings 2005

作者： Wei, Sha Xin Gill, Satinder Topological Media Lab Graphics Visualization and Usability Center Georgia Institute of Technology Cambridge United Kingdom Program in Science Technology and Society Massachusetts Institute of Technology Cambridge United Kingdom Interaction Design Centre School of Computing Science Middlesex University London United Kingdom Centre for Music and Science Cambridge United Kingdom

ISBN: (纸本)1595930256

Ambience and immersive technological environments allow us to explore some basics of human pragmatics that lie beyond linguistics, intentionality and the subject-agency perspectives of human interaction. We focus on gesture and the body in sense-making and propose a discussion drawing on a non-dualist and agent-free account of embodied, material experience. By agent-free we mean an approach that does not presume a monolithic subject. Moreover, we deal with the problem of intersubjectivity by studying the human coordination of activity without appealing to a transmission theory of communication. [6] We achieve this by considering how gesture spans multiple bodies and how aesthetic design works with this and facilitates it. The paper is in two parts, the first part covers movement studies, focusing on gesture and body movement, drawing on the acting and pragmatics, and the second part develops this with the example of the TGarden, a responsive play space for experimental performance augmented by gesturally nuanced computational media. Copyright 2005 ACM.

关键词： Gesture recognition

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