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rMSI: an R package for MS imaging data handling and visualization

BIOINFORMATICS 2017年第15期33卷 2427-2428页

作者： Rafols, Pere Torres, Sonia Ramirez, Noelia del Castillo, Esteban Yanes, Oscar Brezmes, Jesus Correig, Xavier Rovira & Virgili Univ Dept Elect Engn IISPV Tarragona 43007 Spain Spanish Biomed Res Ctr Diabet & Associated Metab Madrid 28029 Spain

R platform provides some packages that are useful to process mass spectrometry imaging (MSI) data;however, none of them provide an easy to use graphical user interface (GUI). Here, we introduce rMSI, an R package for MSI data analysis focused on providing an efficient way to manage MSI data together with a GUI integrated in R environment. MS data is loaded in rMSI custom format optimized to minimize the memory footprint yet maintaining a fast spectra access. The rMSI GUI is designed for simple and effective data exploration and visualization. Moreover, rMSI is designed to be integrated in the R environment through a library of functions that can be used to share MS data across others R packages. The release of rMSI for R environment establishes a novel and flexible platform for MSI data analysis, completely free and open-source.

关键词： IMAGING systems in biology GRAPHICAL user interfaces (computer systems) computer graphics software DATA analysis software

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A numerical simulation tool for multilayer grounding analysis integrated in an open-source CAD interface

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INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 2013年第1期45卷 353-361页

作者： Colominas, I. Paris, J. Fernandez, D. Navarrina, F. Casteleiro, M. Univ A Coruna Grp Numer Methods Engn Dept Appl Math Sch Civil Engn La Coruna 15071 Spain

In this paper we present TOTBEM: a simulation tool for grounding systems based on the open-source platform SALOME. The package TOTBEM includes all the preprocessing, computing and postprocessing stages necessary to perform a complete earthing analysis. The kernel of TOTBEM is a numerical formulation based on the Boundary Element Method for uniform and stratified soil models proposed by the authors in the last years. Furthermore, in this work we show the main highlights of an efficient technique based on the Aitken delta(2)-process in order to improve the rate of convergence of the involved series expansions in multilayer soil models. (c) 2012 Elsevier Ltd. All rights reserved.

关键词： Grounding Numerical analysis Convergence of numerical methods computer aided analysis computer graphics software Open-source platform

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Comparing and evaluating computer graphics and visualization software

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software-PRACTICE & EXPERIENCE 2008年第7期38卷 735-760页

作者： Laramee, Robert S. Univ Coll Swansea Dept Comp Sci Visual & Interact Comp Grp Swansea SA2 8PP W Glam Wales

When starting a new computer graphics or visualization software project, students, researchers, and businesses alike must decide whether or not to start from scratch or with third-party software. Since computer graphics and visualization applications are typically quite large, developers often build upon existing software libraries in order to take advantage of the tens of thousands of hours worth of development and testing already invested. Thus, developers and managers must face the decision of which library to build on. We present a side-by-side comparison and evaluation of four popular, state-of-the-art visualization and computer graphics libraries, namely the Visualization Toolkit (VTK), Open Inventor, Coin3D, and Hoops 31). The evaluation is based on the feature set, ease of installation, development of a benchmark application, documentation, and technical support for each package. The results of our comparison and evaluation are described and recommendations are given as for whom the libraries are best suited. The VTK prevails on top in many of the aspects we compared and evaluated. Copyright (C) 2007 John Wiley & Sons, Ltd.

关键词： computer graphics software visualization software graphics API visualization API

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software Environment for Learning and Knowledge Assessment Based on Graphical Gadgets

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INTERNATIONAL JOURNAL OF ENGINEERING EDUCATION 2012年第5期28卷 1127-1140页

作者： Mihajlovic, Zeljka Cupic, Marko Univ Zagreb Fac Elect Engn & Comp Dept Elect Microelect Comp & Intelligent Syst Zagreb 10000 Croatia

In this paper we present a successful implementation of a new software environment for learning and knowledge assessment. We introduce a new kind of gadget that is appropriate for inclusion in learning environments. The proposed gadgets are based on individualized interactive graphics tasks that are similar to educational Java applets. However, the usual graphical applets are not individualized: they do not have a defined goal for the learner and they do not evaluate the solution to a given graphical task. Using several examples, we present the development of the gadgets. The development of gadgets must address two problems: how to create and present an individualized task to the student and how to evaluate the student's solution, especially when multiple solutions are possible or solutions can be partially correct. The tasks that are described in this paper are intended for learning and knowledge assessment in computer graphics courses. However, the proposed concept is applicable to many other courses and educational activities. To study the influence of the proposed software environment on student learning and performance, we provide experimental results from several years of student use of different gadgets in preparation for mid-term and final exams and we analyze and discuss the findings. In addition, each year a selected group of students was given the opportunity to develop and implement several gadgets that were then used by their peers for learning and knowledge assessment. We discuss the results obtained and the experience gained.

关键词： educational technology computer graphics software unsupervised learning programming environments

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Possibilities of computer Simulation in Power Engineering and Environmental Engineering

Possibilities of Computer Simulation in Power Engineering an...

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International Joint Conference on computer, Information, Systems Sciences and Engineering

作者： Nohacova, Lucie Nohac, Karel Univ W Bohemia Plzen 30614 Czech Republic

ISBN: (纸本)9789048136575

This article concerns on overview of today software products for ordinary personal computers and small workstations, gives list of important features relevant to solution of environmental foresighting. For this branch of problems are important not only usual advantages of software packages like computing power, simplicity of use, number of prepared models, but in the first place multidisciplinarity and reliability of gained output. This time there are many software packages prepared for instant use in many branches, this paper describes only few of them and concerns on most known and accessible systems for simulation with partial focus on systems for power engineering problems, which are one of most complex and important problems to be solved. Especially in environmental foresighting there is very high level of complexity of possible systems influence with direct and indirect way. For that reasons there are in this branch many chances to use computer simulations of systems to gain exact overview of future conditions of systems depending of various factors.

关键词： Power engineering Engineering computer graphics software computer science education

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Wrinkling Captured Garments Using Space-Time Data-Driven Deformation

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computer graphics FORUM 2009年第2期28卷 427-435页

作者： Popa, T. Zhou, Q. Bradley, D. Kraevoy, V. Fu, H. Sheffer, A. Heidrich, W. Univ British Columbia Vancouver BC V5Z 1M9 Canada

The presence of characteristic fine folds is important for modeling realistic looking virtual garments. While recent garment capture techniques are quite successful at capturing the low-frequency garment shape and motion over time, they often fail to capture the numerous high-frequency folds, reducing the realism of the reconstructed space-time models. In our work we propose a method for reintroducing fine folds into the captured models using data-driven dynamic wrinkling. We first estimate the shape and position of folds based on the original video footage used for capture and then wrinkle the surface based on those estimates using space-time deformation. Both steps utilize the unique geometric characteristics of garments in general, and garment folds specifically, to facilitate the modeling of believable folds. We demonstrate the effectiveness of our wrinkling method on a variety of garments that have been captured using several recent techniques.

关键词： Clothing & dress -- software Digital image processing software computer-aided imagery software computer graphics research computer graphics software Three-dimensional imaging -- software

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Optimistic Parallelism Requires Abstractions

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COMMUNICATIONS OF THE ACM 2009年第9期52卷 89-97页

作者： Kulkarni, Milind Pingali, Keshav Walter, Bruce Ramanarayanan, Ganesh Bala, Kavita Chew, L. Paul Univ Texas Austin Austin TX 78712 USA Cornell Univ Ithaca NY USA

The problem of writing software for multicore processors is greatly simplified if we could automatically parallelize sequential programs. Although auto-parallelization has been studied for many decades, it has succeeded only in a few application areas such as dense matrix computations. In particular, auto-parallelization of irregular programs, which are organized around large, pointer-based data structures like graphs, has seemed intractable. The Galois project is taking a fresh look at auto-parallelization. Rather than attempt to parallelize all programs no matter how obscurely they are written, we are designing programming abstractions that permit programmers to highlight opportunities for exploiting parallelism in sequential programs, and building a runtime system that uses these hints to execute the program in parallel. In this paper, we describe the design and implementation of a system based on these ideas. Experimental results for two real-world irregular applications, a Delaunay mesh refinement application and a graphics application that performs agglomerative clustering, demonstrate that this approach is promising.

关键词： Data structures (computer science) computer algorithms Data mining Parallel logic programming Abstract thought Microprocessors computer logic software architecture Sequential processing (computer science) Program transformation (computer programming) computer graphics software Abstract data types (computer science) Java (computer program language) Data parsing

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Enabling Users to Create and Document 3D Content for Heritage

Enabling Users to Create and Document 3D Content for Heritag...

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Computation World - Future Computing, Service Computation, Cognitive, Adaptive, Content, Patterns Conference

作者： Rodriguez-Echavarria, Karina Morris, David Arnold, David Univ Brighton Fac Management & Informat Sci Brighton BN2 4AT E Sussex England

ISBN: (纸本)9781424451661

This paper presents research on developing processes for content creation of 3D assets of public monuments and sculptures in towns and cities in the Sussex area of the United Kingdom. This type of heritage is usually located in neighbourhoods among the public, who live and interact with them on a day to day basis. The paper recognises the challenges involved in requiring non-experts to use software and hardware for 3D graphics, which are not yet of common use. Hence, the research has been focused from early stages to gather feedback in order to lower the threshold of 3D technologies. Specifically, this paper addresses the development and use of tools to allow users to create 3D content and integrate it with semantic information. The information is disseminated in a web based format. As a result, the public sculptures and monuments database supports scholar and public dissemination by presenting a variety of integrated documentation on the project website: http://***

关键词： User generated content computer graphics software Knowledge acquisition User interfaces

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A new direction in computational electromagnetics: Solving large problems using the parallel FDTD on the BlueGene/L superconductor providing teraflop-level performance

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IEEE ANTENNAS AND PROPAGATION MAGAZINE 2008年第2期50卷 26-44页

作者： Yu, Wenhua Yang, Xiaoling Liu, Yongjun Ma, Lai-Ching Su, Tao Huang, Neng-Tien Mittra, Raj Maaskant, Rob Lu, Yongquan Che, Qing Lu, Rui Su, Zhiwu Penn State Univ EMC Lab University Pk PA 16802 USA Netherlands Fdn Res Dwingeloo Astron ASTRON Dwingeloo Netherlands Commun Univ China Beijing 100024 Peoples R China

Rapid developments in high-performance supercomputers, with upward of 65,536 processors and 32 terabytes of memory, have dramatically changed the landscape in computational electromagnetics. The IBM BlueGene/L supercomputer are examples. They have recently made it possible to solve extremely large problems efficiently. For instance, they have reduced 52 days of simulation on a single Pentium 4 processor to only about 10 minutes on 4000 processors in a BlueGene/L supercomputer. In this article, we investigate the performance of a parallel Finite-Difference Time-Domain (FDTD) code on a large BlueGene/L system. We show that the efficiency of the code is excellent, and can reach up to 90%. The code has been used to simulate a number of electrically large problems, including a 100 x 100 patch antenna array, a 144-element dual-polarized Vivaldi array, a 40-element helical antenna array, and an electronic packaging problem. The results presented serve to demonstrate the efficiency of the parallelization of the code on the BlueGene/L system. In addition, we also introduce the development of the high-performance Beowulf clusters for simulation of electrically large problems.

关键词： FDTD parallel algorithms parallel processing parallel machines antennas antenna arrays packaging computer graphics software graphical user interfaces microstrip arrays Vivaldi antennas helical antennas

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Modelling and Control in Biomedical Systems 2006

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丛书名： IPV - IFAC Proceedings Volume

2006年

作者： Zaytoon, Janan Feng, David Dagan

ISBN: (数字)9780080479491

ISBN: (纸本)9780080445304

Modelling and Control in Biomedical Systems (including Biological Systems) was held in Reims, France, 20-22 August 2006. This Symposium was organised by the University of Reims Champagne Ardenne and the Societe de l'Electricite, de l'Electronique et des TIC (SEE). The Symposium attracted practitioners in engineering, information technology, mathematics, medicine and biology, and other related disciplines, with authors from 24 countries. Besides the abstracts of the four plenary lectures, this volume contains the 92 papers that were presented by their authors at the Symposium. The papers included two invited keynote presentations given by internationally prominent and well-recognised research leaders: Claudio Cobelli, whose talk is titled 'Dynamic modelling in diabetes: from whole body to genes'; and Irving J. Bigio, whose talk is titled 'Elastic scattering spectroscopy for non-invasive detection of cancer'. Two prestigious industrial speakers were also invited to give keynote presentations: Terry O'Brien from LIDCO, whose talk is titled 'LIDCO: From the laboratory to protocolized goal directed therapy'; and Lorenzo Quinzio of Philips, whose talk is titled 'Clinical decision support in monitoring and information systems'. The title includes a valuable source of information on the state-of- the-art in Modelling and Control in Biomedical Systems.

关键词： biomedical engineering mathematical modelling computer modelling computer graphics software

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