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1

An introductory course in computer communication and networks  

Microsoft Academic Search

This paper reports on the curriculum contents and experience obtained in the teaching of a semester-long introductory course in computer communication networks. The course is aimed at first year graduate and senior undergraduate students and covers a broad survey of networking issues. We focus on all seven layers of the OSI reference model and assign four major programming projects to

Thomas Narten; Raj Yavatkar

1992-01-01

2

A Model Computer Literacy Course.  

ERIC Educational Resources Information Center

Designed to address the varied computer skill levels of college students, this proposed computer literacy course would be modular in format, with modules tailored to address various levels of expertise and permit individualized instruction. An introductory module would present both the history and future of computers and computing, followed by an…

Orndorff, Joseph

3

Computer Networks As Social Networks  

Microsoft Academic Search

Computer networks are inherently social networks, linking people, organizations, and knowledge. They are social institutions that should not be studied in isolation but as integrated into everyday lives. The proliferation of computer networks has facilitated a deemphasis on group solidarities at work and in the community and afforded a turn to networked societies that are loosely bounded and sparsely knit.

Barry Wellman

2001-01-01

4

Training Courses by Japanese Computer Manufacturers.  

ERIC Educational Resources Information Center

Discusses the status of training courses conducted by computer manufacturers for their employees, including types of training, trainee classification, course arrangement, fees, examples of courses provided by manufacturers, trends, and future expectations. (MBR)

Hanaoka, Sho

1985-01-01

5

A Position on a Computer Literacy Course.  

ERIC Educational Resources Information Center

A position is put forth on the appropriate content of a computer literacy course and the role of computer literacy in the community college. First, various definitions of computer literacy are examined, including the programming, computer awareness, and comprehensive approaches. Next, five essential components of a computer literacy course are…

Self, Charles C.

6

Course continuity in the Computer Science curriculum  

Microsoft Academic Search

The Computer Science curriculum partitions the subject matter into discrete courses. This division, however, is artificial and arbitrary, and, when exacerbated by a number of additional factors, leads to an apparent lack of continuity among Computer Science courses. As a result, students never perceive Computer Science as an integral discipline, nor understand and appreciate the close interrelationships that link the

Richard Connelly; Haldun Hadimioglu; David Herscovici; Lubomir Ivanov; Mark Hoffman

2005-01-01

7

Integrated online courseware for computer science courses  

Microsoft Academic Search

Computer Science CourseWare (CSCW) is a Web-based in- tegrated online courseware system for the management of computer science courses developed by the Miami Univer- sity Department of Computer Science and Systems Analysis. The system is designed to support a unified student expe- rience for content delivery and programming (and general) assignment management. CSCW promotes incremental de- velopment through rapid feedback

Michael T. Helmick

2007-01-01

8

Integrated online courseware for computer science courses  

Microsoft Academic Search

Computer Science CourseWare (CSCW) is a Web-based integrated online courseware system for the management of computer science courses developed by the Miami University Department of Computer Science and Systems Analysis. The system is designed to support a unified student experience for content delivery and programming (and general) assignment management. CSCW promotes incremental development through rapid feedback for students with its

Michael T. Helmick

2007-01-01

9

Survey of Computer Networks.  

National Technical Information Service (NTIS)

The paper presents the results of a survey of state-of-the-art computer networks. It identifies ten major networks: ARPA, COINS, CYBERNET, the Distributed Computer Systems, DLS, MERIT, Network/440, Octopus, TSS, and TUCC and outlines their capabilities an...

J. J. Peterson S. A. Veit

1971-01-01

10

Computational thinking in high school courses  

Microsoft Academic Search

The number of undergraduates entering computer science has declined in recent years. This is paralleled by a drop in the number of high school students taking the CS AP exam and the number of high schools offering computer science courses. The declines come at a time when career opportunities in CS continue to grow and computer science graduates are seen

Vicki H. Allan; Valerie Barr; Dennis Brylow; Susanne E. Hambrusch

2010-01-01

11

A course in Computational Physics  

NASA Astrophysics Data System (ADS)

This course, taught at UConn, has several objectives: 1) To make the students comfortable in using MATLAB; 2) To reveal the existence of unavoidable inaccuracies due to numerical roundoff errors and algorithm inaccuracies; 3) to introduce modern spectral expansion methods [1], and compare them with conventional finite difference methods. Some of the projects assigned in the course will be described, such as the motion of a falling parachute, and the vibrations of an inhomogeneous vibrating string [2]. [4pt] [1] Lloyd N. Trefethen, "Spectral Methods in MATLAB (SIAM, Philadelphia, PA, 2000)"; John P. Boyd, "Chebyshev and Fourier Spectral Methods," (Dover Publications, Inc. Mineola, New York, Second revised edition, 2001). [2] G. Rawitscher and J. Liss, "The vibrating inhomogeneous string," Am. J. of Phys., to be published; and arXiv:1006,1913v1 [physics.comp-ph

Rawitscher, George

2011-03-01

12

Action Research in the Educational Computing Course.  

ERIC Educational Resources Information Center

The instructor of the educational computing course at the University of Houston used action research to address the following questions and improve the course: "How could I formalize the process of action, reflection, and feedback?" and "Do certain types of learners do better with certain types of activities and certain structures for activities?"…

Bump, Wren M.

13

The Educational Computing Course. [SITE 2002 Section].  

ERIC Educational Resources Information Center

This document contains the following papers on the educational computing course from the SITE (Society for Information Technology & Teacher Education) 2002 conference: (1) "Integrating Media Literacy into a Technology Course for Preservice Secondary Teachers" (Gregg Brownell and Nancy Brownell); (2) "From Video Tutors to Electronic Portfolios:…

Bump, Wren, Ed.

14

Designing Computer-Accented Courses.  

ERIC Educational Resources Information Center

Explains a systematic process for integrating computers into college coursework. Computer support for traditional learning delivery modes including lectures, cases, and simulation is described; new teaching methods emphasizing the amount of structure and instructor involvement are discussed; and a four stage learning process based on behavioral…

Rao, Ashok

1988-01-01

15

Ada in Introductory Computer Science Courses.  

National Technical Information Service (NTIS)

Sacred Heart University's current computer science curriculum has been modified in the 1992-1993 school year after receiving an ARPA Grant(Advanced Research Project Agency) for Undergraduate Curriculum and Course Development in Software Engineering and th...

S. H. Adams

1993-01-01

16

Plagiarism in computer science courses  

Microsoft Academic Search

Plagiarism of computer programs has long been a problem in higher education. Ease of electronic copying, vague understanding by students as to what constitutes plagiarism, increasing acceptance of plagiarism by students, lack of enforcement by instructors and school adminstrators, and a whole host of other factors contribute to plagiarism. The first step in curbing plagiarism is prevention, the second (and

James K. Harris

1994-01-01

17

Using Computers in Introductory Astronomy Courses  

Microsoft Academic Search

Computer literacy is fast becoming a focal point in undergraduate education. Scientific literacy has been a continuing goal of undergraduate programs across the nation and a course in introductory astronomy is often used to satisfy such science requirements. At U. MD an introduction to computer skills is being integrated into our astronomy curriculum for non-science majors. The campus is adequately

Grace L. Deming

1995-01-01

18

Modelling computer networks  

NASA Astrophysics Data System (ADS)

Traffic models in computer networks can be described as a complicated system. These systems show non-linear features and to simulate behaviours of these systems are also difficult. Before implementing network equipments users wants to know capability of their computer network. They do not want the servers to be overloaded during temporary traffic peaks when more requests arrive than the server is designed for. As a starting point for our study a non-linear system model of network traffic is established to exam behaviour of the network planned. The paper presents setting up a non-linear simulation model that helps us to observe dataflow problems of the networks. This simple model captures the relationship between the competing traffic and the input and output dataflow. In this paper, we also focus on measuring the bottleneck of the network, which was defined as the difference between the link capacity and the competing traffic volume on the link that limits end-to-end throughput. We validate the model using measurements on a working network. The results show that the initial model estimates well main behaviours and critical parameters of the network. Based on this study, we propose to develop a new algorithm, which experimentally determines and predict the available parameters of the network modelled.

Max, G.

2011-01-01

19

Guest Editor's Introduction: Computation in Physics Courses  

NSDL National Science Digital Library

You know one if you see one, but can you define a computational physics course in general? Even more fundamentally, can you specify what role numerical computations should have in any standard physics course? The quest to address such questions was the motivation for a project that has culminated in the publication of this special issue. I believe and hope that our non-physicist readers will regard this special issue as an opportunity to gather information and learn lessons that extend beyond physics to other disciplines.

Winch, David

2008-07-23

20

A Survey of Computer Science Capstone Course Literature  

ERIC Educational Resources Information Center

In this article, we surveyed literature related to undergraduate computer science capstone courses. The survey was organized around course and project issues. Course issues included: course models, learning theories, course goals, course topics, student evaluation, and course evaluation. Project issues included: software process models, software…

Dugan, Robert F., Jr.

2011-01-01

21

Stochastic Networked Computation  

Microsoft Academic Search

In this paper, the stochastic networked computation (SNC) paradigm for designing robust and energy-efficient systems-on-a-chip in nanoscale process technologies, where robust computation is treated as a statistical estimation problem is presented. The benefits of SNC are demonstrated by employing it to design an energy-efficient and robust pseudonoise-code acquisition system for the wireless CDMA2000 standard (http:\\/\\/www.3gpp2.org). Simulations in IBM's 130-nm CMOS

Girish Vishnu Varatkar; Shrikanth S. Narayanan; Naresh R. Shanbhag; Douglas L. Jones

2010-01-01

22

K-12 Computer Networking.  

ERIC Educational Resources Information Center

The "ERIC Review" is published three times a year and announces research results, publications, and new programs relevant to each issue's theme topic. This issue is intended to help teacher educators, administrators, librarians, adult educators, and individual teachers introduce others to education resources on computer networks. There are nine…

ERIC Review, 1995

1995-01-01

23

Virtual Network Computing  

NSDL National Science Digital Library

The Virtual Network Computing software package, a product of AT&T Laboratories Cambridge, is one of the more useful and decidedly different utilities than generally appears in our Network Tools section. This software, although it is complex in nature and has a technical-sounding moniker, allows one to use just about any computer remotely across a local area network or even the Internet. To accomplish this remote use, the system actually displays the entire desktop of the remote computer in a window on the local computer. Amazingly, you can display and use a Macintosh desktop, for example, on your Win95/98/NT system or a Win95/98/NT desktop on your Unix system or any other combination of these possibilities. The system is simple to install and works quite well. Although minor bugs are noticeable, the system is complete enough to allow, for example, the remote use of many popular Windows programs on a Unix system. The VNC system is free to download and use and runs on Win95/98/NT, SPARC Solaris, Linux, and DEC Alpha OSF1. Beta versions of the software are also available for the Macintosh and Windows CE 2.x.

24

Review of Computer Networking Technology.  

National Technical Information Service (NTIS)

The report gives a descriptive summary of the technical characteristics of existing computer networks, including data communication technology and configuration related to support of resource sharing services for a computer network. Included are discussio...

R. P. Blanc

1974-01-01

25

A Computer-based Course in Classical Mechanics.  

ERIC Educational Resources Information Center

Describes and illustrates the tutorial and homework exercise lessons, student routing, course organization, administration, and evaluation of a PLATO computer-based course in classical mechanics. An appendix lists 41 lessons developed for the course. (CMV)

Kane, D.; Sherwood, B.

1980-01-01

26

Toward Understanding Student Differences in a Computer Skills Course.  

ERIC Educational Resources Information Center

Describes a study that examined various characteristics of undergraduate students enrolled in a computer skills course. Variables considered include gender, college major, high school computer courses, other prior computer experience, computer self-efficacy, computer attitude, computer anxiety, and cognitive style. (Author/LRW)

Houle, Philip A.

1996-01-01

27

The Effects of Course Structure on Students' Computer Attitudes.  

ERIC Educational Resources Information Center

This study investigated the effects of course structure variables on the computer anxiety, confidence, and attitudes of college students. Course structure variables include the number of weeks the course met (course length) and the number of meetings per week (course frequency). The effects of differences in instructors' use of anxiety reducing…

Bohlin, Roy M.; Hunt, Nancy P.

28

Computer and Software Use in Teaching the Beginning Statistics Course.  

ERIC Educational Resources Information Center

Surveys the extent of computer usage in the beginning statistics course and the variety of statistics software used. Finds that 69% of the psychology departments used computers in beginning statistics courses and 90% used computer-assisted data analysis in statistics or other courses. (CMK)

Bartz, Albert E.; Sabolik, Marisa A.

2001-01-01

29

Computer Networks and Networking: A Primer.  

ERIC Educational Resources Information Center

Provides a basic introduction to computer networks and networking terminology. Topics addressed include modems; the Internet; TCP/IP (Transmission Control Protocol/Internet Protocol); transmission lines; Internet Protocol numbers; network traffic; Fidonet; file transfer protocol (FTP); TELNET; electronic mail; discussion groups; LISTSERV; USENET;…

Collins, Mauri P.

1993-01-01

30

A CAD (Classroom Assessment Design) of a Computer Programming Course  

ERIC Educational Resources Information Center

This paper presents a CAD (classroom assessment design) of an entry-level undergraduate computer programming course "Computer Programming I". CAD has been the product of a long experience in teaching computer programming courses including teaching "Computer Programming I" 22 times. Each semester, CAD is evaluated and modified for the subsequent…

Hawi, Nazir S.

2012-01-01

31

Resources for instructors of capstone courses in computing  

Microsoft Academic Search

Most computing programs now have some form of integrative or capstone course in which students undertake a significant project under supervision. There are many different models for such courses and conducting these courses is a complex task. This report is intended to assist instructors of capstone courses, particularly those new to the model of teaching and learning inherent in the

Tony Clear; Michael Goldweber; Frank H. Young; Paul M. Leidig; Kirk Scott

2001-01-01

32

Using Virtualization and Automatic Evaluation: Adapting Network Services Management Courses to the EHEA  

ERIC Educational Resources Information Center

This paper outlines the adaptation of a course on the management of network services in operating systems, called NetServicesOS, to the context of the new European Higher Education Area (EHEA). NetServicesOS is a mandatory course in one of the official graduate programs in the Faculty of Computer Science at the Universidad Nacional de Educacion a…

Ros, S.; Robles-Gomez, A.; Hernandez, R.; Caminero, A. C.; Pastor, R.

2012-01-01

33

Augmenting computer networks  

NASA Technical Reports Server (NTRS)

Three methods of augmenting computer networks by adding at most one link per processor are discussed: (1) A tree of N nodes may be augmented such that the resulting graph has diameter no greater than 4log sub 2((N+2)/3)-2. Thi O(N(3)) algorithm can be applied to any spanning tree of a connected graph to reduce the diameter of that graph to O(log N); (2) Given a binary tree T and a chain C of N nodes each, C may be augmented to produce C so that T is a subgraph of C. This algorithm is O(N) and may be used to produce augmented chains or rings that have diameter no greater than 2log sub 2((N+2)/3) and are planar; (3) Any rectangular two-dimensional 4 (8) nearest neighbor array of size N = 2(k) may be augmented so that it can emulate a single step shuffle-exchange network of size N/2 in 3(t) time steps.

Bokhari, S. H.; Raza, A. D.

1984-01-01

34

Information visualization courses for students with a computer science background.  

PubMed

Linnaeus University offers two master's courses in information visualization for computer science students with programming experience. This article briefly describes the syllabi, exercises, and practices developed for these courses. PMID:24807935

Kerren, A

2013-01-01

35

Expanding security awareness in introductory computer science courses  

Microsoft Academic Search

Information Security is typically reserved for upper division courses in Computer Science (CS) and Computer Information System (IS) programs. It is often an elective or graduate level course. Information Security is an important topic that can be introduced early and often throughout the undergraduate curriculum. Security is pervasive in all disciplines of computer-related fields and early introduction not only would

Stefanie A. Markham

2009-01-01

36

Redesigning and revitalizing two networking courses in an undergraduate information technology degree program  

Microsoft Academic Search

Information technology is a fast changing discipline and is being conceived as a practical discipline. Information technology graduates are expected to possess relevant, practical experience when dealing with many facets of computing systems, especially in the areas of data communication, network design and administration. An information technology program of a mid-sized state university redesigned and revitalized two networking courses. They

Kam Fui Lau

2010-01-01

37

Computing spin networks  

SciTech Connect

We expand a set of notions recently introduced providing the general setting for a universal representation of the quantum structure on which quantum information stands. The dynamical evolution process associated with generic quantum information manipulation is based on the (re)coupling theory of SU (2) angular momenta. Such scheme automatically incorporates all the essential features that make quantum information encoding much more efficient than classical: it is fully discrete; it deals with inherently entangled states, naturally endowed with a tensor product structure; it allows for generic encoding patterns. The model proposed can be thought of as the non-Boolean generalization of the quantum circuit model, with unitary gates expressed in terms of 3nj coefficients connecting inequivalent binary coupling schemes of n + 1 angular momentum variables, as well as Wigner rotations in the eigenspace of the total angular momentum. A crucial role is played by elementary j-gates (6j symbols) which satisfy algebraic identities that make the structure of the model similar to 'state sum models' employed in discretizing topological quantum field theories and quantum gravity. The spin network simulator can thus be viewed also as a Combinatorial QFT model for computation. The semiclassical limit (large j) is discussed.

Marzuoli, Annalisa [Dipartimento di Fisica Nucleare e Teorica, Universita degli Studi di Pavia, Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via A. Bassi 6, 27100 Pavia (Italy)]. E-mail: annalisa.marzuoli@pv.infn.it; Rasetti, Mario [Dipartimento di Fisica, Istituto Nazionale di Fisica della Materia, Politecnico di Torino, corso Duca degli Abruzzi 24, 10129 Torino (Italy)]. E-mail: rasetti@isi36a.isi.it

2005-08-01

38

Fortran and the first course in computer science  

Microsoft Academic Search

The purpose of this paper is to assess realistically andpractically the merits and demerits of Fortran as the language tobe used in a first course in computer science. To do this computerscience education is first considered as a process in whichsuccessive courses should aim at increasingly greater depth ofunderstanding as in, for example, mathematics education. Then theaims of first courses

Anthony Ralston

1971-01-01

39

Pervasive Computing on Active Networks  

Microsoft Academic Search

Pervasive computing is the next generation computing environment with information and communication technology everywhere, for everyone, at any time. There are many methods proposed to reach the ultimate design goals of pervasive computing. Most of them are still at the hypothesis and early stages. In this paper, an initial investigation has been carried out to use active networks as the

Ka Lun Eddie Law; Sunny So

2004-01-01

40

Integrating Emerging Topics through Online Team Design in a Hybrid Communication Networks Course: Interaction Patterns and Impact of Prior Knowledge  

ERIC Educational Resources Information Center

An important challenge in the introductory communication networks course in electrical and computer engineering curricula is to integrate emerging topics, such as wireless Internet access and network security, into the already content-intensive course. At the same time it is essential to provide students with experiences in online collaboration,…

Reisslein, Jana; Seeling, Patrick; Reisslein, Martin

2005-01-01

41

Social networks generate interest in computer science  

Microsoft Academic Search

For forty years programming has been the foundation of introductory computer science. Despite exponential increases in computational power during this period, examples used in introductory courses have remained largely unchanged. The incredible growth in statistics courses at all levels, in contrast with the decline of students taking computer science courses, points to the potential for introducing computer science at many

Casey Alt; Owen Astrachan; Jeffrey Forbes; Richard Lucic; Susan Rodger

2006-01-01

42

Computing Systems and Networks Division.  

National Technical Information Service (NTIS)

This brochure describes the mission and workings of the Computing Systems and Networks Division of the Naval Surface Warfare Center (NAVSWC) in Dahlgren, Virginia. The Division works towards the following objectives: (1) to provide and maintain Center-wid...

1991-01-01

43

Quantitative Risk Assessment of Computer Virus Attacks on Computer Networks  

Microsoft Academic Search

This paper discusses the various types of malicious software, particularly computer viruses, which threaten computer network dependability, including such attributes as reliability, availability, safety and security of computer systems. Quantitative risk assessment of computer virus attacks on computer networks is investigated. To this end, an analytical model to study computer virus propagation in a typical network is developed and the

Ben Soh; Tharam S. Dillon; Phil County

1995-01-01

44

Course Content for a Telecommunication Course in an End-User Computing Support Program.  

ERIC Educational Resources Information Center

A modified Delphi panel of telecommunications educators developed a list of specific content topics for a business telecommunications course. Major content areas were recommended: local and wide area networks, media, hardware, e-mail, emerging technologies, network topologies, data signals, conceptual foundations, and social and ethical issues.…

Crews, Tena B.; Ray, Charles M.

1998-01-01

45

Oral business english network course design in secondary vocational school  

Microsoft Academic Search

Oral Business English is a required course for E- commerce major students of secondary vocational school. This paper describes the design of Oral Business English network course of secondary vocational school on the aspects of the general design concept, basic structure, modules design and technology application, to explore the efficient use of the various teaching resources based on websites, the

Huang Xingyun; Ou Qizhong

2011-01-01

46

Wireless Computational Networking Architectures.  

National Technical Information Service (NTIS)

Motivated by the need of providing on-demand local computing resources over a wireless computing and communication infrastructure, we will begin to face over the next decade very large sensor-generated datasets on the order of zettabytes or even yottabyte...

B. W. Suter

2013-01-01

47

Social networks generate interest in computer science  

Microsoft Academic Search

For forty years programming has been the foundation of in- troductory computer science. Despite exponential increases in computational power during this period, examples used in introductory courses have remained largely unchanged. The incredible growth in statistics courses at all levels, in contrast with the decline of students taking computer sci- ence courses, points to the potential for introducing com- puter

Casey Alt; Owen L. Astrachan; Jeffrey Forbes; Richard Lucic; Susan H. Rodger

2006-01-01

48

Addressing Small Computers in the First OS Course  

ERIC Educational Resources Information Center

Small computers are emerging as important components of the contemporary computing scene. Their operating systems vary from specialized software for an embedded system to the same style of OS used on a generic desktop or server computer. This article describes a course in which systems are classified by their hardware capability and the…

Nutt, Gary

2006-01-01

49

Laboratories for a Liberal Education Computer Science Course.  

ERIC Educational Resources Information Center

Computer science and other computer related fields are faced with the high velocity of change in technology. Far more important than the knowledge of a particular software package is the liberal education skills that are learned in the process. This paper reviews the laboratory component of a new computer science course offered at Miami University…

Kiper, James D.; Bishop-Clark, Cathy

50

Time-course of cortical networks involved in working memory.  

PubMed

Working memory (WM) is one of the most studied cognitive constructs. Although many neuroimaging studies have identified brain networks involved in WM, the time course of these networks remains unclear. In this paper we use dense-array electroencephalography (dEEG) to capture neural signals during performance of a standard WM task, the n-back task, and a blend of principal components analysis and independent components analysis (PCA/ICA) to statistically identify networks of WM and their time courses. Results reveal a visual cortex centric network, that also includes the posterior cingulate cortex, that is active prior to stimulus onset and that appears to reflect anticipatory, attention-related processes. After stimulus onset, the ventromedial prefrontal cortex, lateral prefrontal prefrontal cortex, and temporal poles become associated with the prestimulus network. This second network appears to reflect executive control processes. Following activation of the second network, the cortices of the temporo-parietal junction with the temporal lobe structures seen in the first and second networks re-engage. This third network appears to reflect activity of the ventral attention network involved in control of attentional reorientation. The results point to important temporal features of network dynamics that integrate multiple subsystems of the ventral attention network with the default mode network in the performance of working memory tasks. PMID:24523686

Luu, Phan; Caggiano, Daniel M; Geyer, Alexandra; Lewis, Jenn; Cohn, Joseph; Tucker, Don M

2014-01-01

51

The Course as Token: A Construction of/by Networks.  

ERIC Educational Resources Information Center

Describes the way in which a new applied-physics course introduced in British Columbia as part of a program in applied academics can be seen to construct different networks in different contexts. Employs actor network theory (ANT). Contains 20 references. (DDR)

Gaskell, Jim; Hepburn, Gary

1998-01-01

52

Computer Technology and Student Preferences in a Nutrition Course  

ERIC Educational Resources Information Center

This study assessed learner preferences for using computer-based technology in a distance education course. A questionnaire was posted to students who had taken an undergraduate nutrition course at Athabasca University, Canada. The response rate was 57.1% (176 returned out of 308). Subjects were predominately female (93.7%) and nursing students…

Temple, Norman J.; Kemp, Wendy C.; Benson, Wendy A.

2006-01-01

53

Development of a Computer Communications Course Plus Laboratory.  

ERIC Educational Resources Information Center

Describes a computer communication course (and its associated laboratory) developed for electrical engineering students at the University of Florida. The course teaches seniors and graduate students the theoretical limits that affect the implementation of serial digital communications and surveys the interface standards, data link protocols, and…

Couch, Leon W.; Shaffer, Charles V.

1985-01-01

54

A Computer-Guided, General-Education Physics Course  

ERIC Educational Resources Information Center

Describes the development of an autonomous computer-Assisted-Instruction general physics course for liberal-arts students at Florida State University. The course utilizes an IBM 1500 Instructional System to guide the student through a self-paced program of textbook reading assignments and homework problems, audiotaped lectures, PSSC movies, and…

Kromhout, Ora M.; and others

1969-01-01

55

Computer Analysis of Networks Via Inversion of Network Equations.  

National Technical Information Service (NTIS)

The report describes the operation and use of CANINE (Computer Analysis of Networks via Inversion of Network Equations), a time-domain analysis program, for linear time-invariant networks. The networks may contain dependent and independent sources of all ...

P. M. Russo

1968-01-01

56

Numerical Computations in US Undergraduate Physics Courses  

NSDL National Science Digital Library

A recent study using email and Web surveys gathered responses from physics faculty members across the US about their use of numerical computations in the classroom. Responses showed a strong commitment to computational activities from some physics faculty, and a frustration over the lack of such activities from others.

Fuller, Robert G.

2008-06-07

57

Computer-Managed Correspondence in Large Lecture Courses.  

National Technical Information Service (NTIS)

The effects of computer managed personal correspondence from instructor to students in three large lecture sections of an introductory educational psychology course are examined. One section received no correspondence while the second received two and the...

L. W. Sherman

1979-01-01

58

Micro Computer Technician Course. Course Design, Course Curricula, Learning Units, Resource Requirements. InfoTVE 14.  

ERIC Educational Resources Information Center

This guide to the core curricula for the training of microcomputer technicians is designed for school leavers after 10 or more years of general/vocational education with a science and mathematics background. The 2-year course is to be administered in four semesters. An introductory outline of course design and curricula provides the rationale,…

Royal Melbourne Inst. of Tech. (Australia).

59

Collective network for computer structures  

DOEpatents

A system and method for enabling high-speed, low-latency global collective communications among interconnected processing nodes. The global collective network optimally enables collective reduction operations to be performed during parallel algorithm operations executing in a computer structure having a plurality of the interconnected processing nodes. Router devices ate included that interconnect the nodes of the network via links to facilitate performance of low-latency global processing operations at nodes of the virtual network and class structures. The global collective network may be configured to provide global barrier and interrupt functionality in asynchronous or synchronized manner. When implemented in a massively-parallel supercomputing structure, the global collective network is physically and logically partitionable according to needs of a processing algorithm.

Blumrich, Matthias A. (Ridgefield, CT); Coteus, Paul W. (Yorktown Heights, NY); Chen, Dong (Croton On Hudson, NY); Gara, Alan (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Takken, Todd E. (Brewster, NY); Steinmacher-Burow, Burkhard D. (Wernau, DE); Vranas, Pavlos M. (Bedford Hills, NY)

2011-08-16

60

Computational acceleration using neural networks  

NASA Astrophysics Data System (ADS)

The author's recent participation in the Small Business Innovative Research (SBIR) program has resulted in the development of a patent pending technology that enables the construction of very large and fast artificial neural networks. Through the use of UNICON's CogniMax pattern recognition technology we believe that systems can be constructed that exploit the power of "exhaustive learning" for the benefit of certain types of complex and slow computational problems. This paper presents a theoretical study that describes one potentially beneficial application of exhaustive learning. It describes how a very large and fast Radial Basis Function (RBF) artificial Neural Network (NN) can be used to implement a useful computational system. Viewed another way, it presents an unusual method of transforming a complex, always-precise, and slow computational problem into a fuzzy pattern recognition problem where other methods are available to effectively improve computational performance. The method described recognizes that the need for computational precision in a problem domain sometimes varies throughout the domain's Feature Space (FS) and high precision may only be needed in limited areas. These observations can then be exploited to the benefit of overall computational performance. Addressing computational reliability, we describe how existing always-precise computational methods can be used to reliably train the NN to perform the computational interpolation function. The author recognizes that the method described is not applicable to every situation, but over the last 8 months we have been surprised at how often this method can be applied to enable interesting and effective solutions.

Cadaret, Paul

2008-05-01

61

Computer networks in communication survey research  

Microsoft Academic Search

The paper explores the feasibility of using computer networks as communication survey research instruments. Also covered are the use of computers and computer networks in survey studies; a listing of the advantages and disadvantages of network surveys as compared with mail, phone, and fax surveys; a description of the development steps of network surveys; and a comparison of differences in

Chien Chou

1997-01-01

62

Initial experience with a computational thinking course for computer science students  

Microsoft Academic Search

Experience with the first offering of a computational thinking course for computer science (CT4CS) students is reported. The course is grounded in student interaction with fundamental, recurring concepts suggested by comparison with two sets of computer science principles. By using specialized, freely available tools and physical simulations it is possible to provide concrete, tangible learning experiences that neither require knowledge

Dennis Kafura; Deborah Tatar

2011-01-01

63

Integration of Computers into a Course on Biostatistics  

ERIC Educational Resources Information Center

The biostatistics course for undergraduate medical and dental students at the University of Connecticut Health Center is taught by the Keller Plan, and students can use computers to analyze data sets and to score their unit tests. The computer is an essential tool for data analysis and an attractive option for test scoring. (LBH)

Gjerde, Craig L.

1977-01-01

64

A Computer Course for Business Students: Teacher's Guide.  

ERIC Educational Resources Information Center

This teacher's guide is for a course designed to teach business students the fundamentals of the BASIC language and computer programming using a series of business-oriented programs. Each lesson contains an introduction, flow charts, and computer programs. The six lesson topics are print-out and format control, count-average, withholding tax…

Waterhouse, Ann

65

Correlates of Effectiveness of Learning Networks: The Effects of Course Level, Course Type, and Gender on Outcomes  

Microsoft Academic Search

Data for almost 2000 students allow us to contrast learning outcomes for courses in three different modes of delivery (completely online, mixed, and completely on campus). The analyses are based on three different factors: course level (graduate vs. undergraduate), course type (more technical computer science and engineering courses vs. less technical courses in CIS, humanities, and management), and gender. In

Raquel Benbunan-fich; Starr Roxanne Hiltz

2002-01-01

66

Computer technology and student preferences in a nutrition course  

Microsoft Academic Search

This study assessed learner preferences for using computer?based technology in a distance education course. A questionnaire was posted to students who had taken an undergraduate nutrition course at Athabasca University, Canada. The response rate was 57.1% (176 returned out of 308). Subjects were predominately female (93.7%) and nursing students (61.7%). Most students favoured having a web page with frequently asked

Norman J. Temple; Wendy C. Kemp; Wendy A. Benson

2006-01-01

67

Computer networking at SLR stations  

NASA Astrophysics Data System (ADS)

There are several existing communication methods to deliver data from the satellite laser ranging (SLR) station to the SLR data center and back: telephonmodem, telex, and computer networks. The SLR scientific community has been exploiting mainly INTERNET, BITNET/EARN, and SPAN. The total of 56 countries are connected to INTERNET and the number of nodes is exponentially growing. The computer networks mentioned above and others are connected through E-mail protocol. The scientific progress of SLR requires the increase of communication speed and the amount of the transmitted data. The TOPEX/POSEIDON test campaign required to deliver Quick Look data (1.7 kB/pass) from a SLR site to SLR data center within 8 hours and full rate data (up to 500 kB/pass) within 24 hours. We developed networking for the remote SLR station in Helwan, Egypt. The reliable scheme for data delivery consists of: compression of MERIT2 format (up to 89 percent), encoding to ASCII Me (files); and e-mail sending from SLR station--e-mail receiving, decoding, and decompression at the center. We do propose to use the ZIP method for compression/decompression and the UUCODE method for ASCII encoding/decoding. This method will be useful for stations connected via telephonemodems or commercial networks. The electronics delivery could solve the problem of the too late receiving of the FR data by SLR data center.

Novotny, Antonin

1993-06-01

68

Computer networking at SLR stations  

NASA Technical Reports Server (NTRS)

There are several existing communication methods to deliver data from the satellite laser ranging (SLR) station to the SLR data center and back: telephonmodem, telex, and computer networks. The SLR scientific community has been exploiting mainly INTERNET, BITNET/EARN, and SPAN. The total of 56 countries are connected to INTERNET and the number of nodes is exponentially growing. The computer networks mentioned above and others are connected through E-mail protocol. The scientific progress of SLR requires the increase of communication speed and the amount of the transmitted data. The TOPEX/POSEIDON test campaign required to deliver Quick Look data (1.7 kB/pass) from a SLR site to SLR data center within 8 hours and full rate data (up to 500 kB/pass) within 24 hours. We developed networking for the remote SLR station in Helwan, Egypt. The reliable scheme for data delivery consists of: compression of MERIT2 format (up to 89 percent), encoding to ASCII Me (files); and e-mail sending from SLR station--e-mail receiving, decoding, and decompression at the center. We do propose to use the ZIP method for compression/decompression and the UUCODE method for ASCII encoding/decoding. This method will be useful for stations connected via telephonemodems or commercial networks. The electronics delivery could solve the problem of the too late receiving of the FR data by SLR data center.

Novotny, Antonin

1993-01-01

69

Molecular Networks and Genetic Computing  

NASA Astrophysics Data System (ADS)

We discuss limitations of the ``regulated recruitment'' model presented in the previous talk, and supplement it with long-range activation or repression mechanisms, e.g., DNA looping. With this additional mechanism, we show the implementability of a very broad range of complex logic functions involving multiple inputs. We discuss the general design principles that emerge, and show that the transcription control architecture maps directly onto the conjunctive or disjunctive normal form of logic to which any Boolean function can be reduced. Thus, the transcription control system is a natural ``molecular computer'', which is programmable through the evolution or design of regulatory DNA sequences. The capability of this computer can be appreciated by a mapping of our transcription regulation model to a class of neural networks known as the ``Boltzmann machine'' which are known for powerful computations.

Buchler, Nicolas E.; Gerland, Ulrich; Hwa, Terence

2003-03-01

70

Computed Tomography-Enhanced Anatomy Course Using Enterprise Visualization  

ERIC Educational Resources Information Center

Rapid changes in medical knowledge are forcing continuous adaptation of the basic science courses in medical schools. This article discusses a three-year experience developing a new Computed Tomography (CT)-based anatomy curriculum at the Sackler School of Medicine, Tel Aviv University, including describing the motivations and reasoning for the…

May, Hila; Cohen, Haim; Medlej, Bahaa; Kornreich, Liora; Peled, Nathan; Hershkovitz, Israel

2013-01-01

71

Evaluating Computer Lab Modules for Large Biology Courses.  

ERIC Educational Resources Information Center

This paper describes the first phase of a study to investigate students' evaluations of computer laboratory modules in a university-level, non-majors biology course. The National Science Foundation-funded project has two primary goals: (1) to develop programmable, multifunctional Bio LabStations for data collection and analysis, lab extensions,…

Eichinger, David C.; And Others

72

The Use of Blackboard in Computer Information Systems Courses.  

ERIC Educational Resources Information Center

This paper focuses on the rationale for incorporating Blackboard, a Web-authoring software package, as the knowledge construction tool in computer information system courses. The authors illustrate previous strategies they incorporated in their classes, and they present their uses of Blackboard. They point out their reactions as teachers, and the…

Figueroa, Sandy; Huie, Carol

73

Area Converage Displays and Course Line Computers Experimentation.  

National Technical Information Service (NTIS)

Pictorial displays and course-line computers, driven by VORTAC receivers, were tested to appraise the value of area navigation in the Air Traffic Control System. Technical and operational aspects were tested in fixed-wing aircraft and by simulation in the...

G. Adams D. Brandewie R. Harter

1965-01-01

74

Computer-Oriented Calculus Courses Using Finite Differences.  

ERIC Educational Resources Information Center

The so-called discrete approach in calculus instruction involves introducing topics from the calculus of finite differences and finite sums, both for motivation and as useful tools for applications of the calculus. In particular, it provides an ideal setting in which to incorporate computers into calculus courses. This approach has been…

Gordon, Sheldon P.

75

A Term Project for a Course on Computer Forensics  

ERIC Educational Resources Information Center

The typical approach to creating an examination disk for exercises and projects in a course on computer forensics is for the instructor to populate a piece of media with evidence to be retrieved. While such an approach supports the simple use of forensic tools, in many cases the use of an instructor-developed examination disk avoids utilizing some…

Harrison, Warren

2006-01-01

76

Computer network development to achieve resource sharing  

Microsoft Academic Search

In this paper a computer network is defined to be a set of autonomous, independent computer systems, interconnected so as to permit interactive resource sharing between any pair of systems. An overview of the need for a computer network, the requirements of a computer communication system, a description of the properties of the communication system chosen, and the potential uses

Lawrence G. Roberts; Barry D. Wessler

1970-01-01

77

Delayed commutation in quantum computer networks.  

PubMed

In the same way that classical computer networks connect and enhance the capabilities of classical computers, quantum networks can combine the advantages of quantum information and communication. We propose a nonclassical network element, a delayed commutation switch, that can solve the problem of switching time in packet switching networks. With the help of some local ancillary qubits and superdense codes, we can route a qubit packet after part of it has left the network node. PMID:17025870

García-Escartín, Juan Carlos; Chamorro-Posada, Pedro

2006-09-15

78

Software For Monitoring A Computer Network  

NASA Technical Reports Server (NTRS)

SNMAT is rule-based expert-system computer program designed to assist personnel in monitoring status of computer network and identifying defective computers, workstations, and other components of network. Also assists in training network operators. Network for SNMAT located at Space Flight Operations Center (SFOC) at NASA's Jet Propulsion Laboratory. Intended to serve as data-reduction system providing windows, menus, and graphs, enabling users to focus on relevant information. SNMAT expected to be adaptable to other computer networks; for example in management of repair, maintenance, and security, or in administration of planning systems, billing systems, or archives.

Lee, Young H.

1992-01-01

79

Networking Course Syllabus in Accredited Library and Information Science Programs: A Comparative Analysis Study  

ERIC Educational Resources Information Center

The study investigated networking courses offered in accredited Library and Information Science schools in the United States in 2009. The study analyzed and compared network syllabi according to Course Syllabus Evaluation Rubric to obtain in-depth understanding of basic features and characteristics of networking courses taught. The study embraced…

Abouserie, Hossam Eldin Mohamed Refaat

2009-01-01

80

An Infrared Network for Mobile Computers  

Microsoft Academic Search

The PARCTAB infrared network provides a flexible infrastructure for research into wireless mobile computing. The network consists of a collection of room-sized cells each wired with a base station transceiver. Mobile computers communicate with transceivers through a carrier sense multiple access (CSMA) protocol and act as terminals for applications executing on remote hosts. Each mobile computer is represented by a

Norman Adams; Bill N. Schilit; Michael M. Tso; Roy Want

1993-01-01

81

Code 672 observational science branch computer networks  

NASA Technical Reports Server (NTRS)

In general, networking increases productivity due to the speed of transmission, easy access to remote computers, ability to share files, and increased availability of peripherals. Two different networks within the Observational Science Branch are described in detail.

Hancock, D. W.; Shirk, H. G.

1988-01-01

82

Computational construction of specialized biological networks.  

PubMed

Today we have access to more than 1500 molecular database systems inside the internet. Based on these databases and information systems, computer scientists developed and implemented different methods for the automatic integration and prediction of biological networks. The idea is to use such methods for the automatic prediction and expansion of rudimentary molecular knowledge. However, the inherent data deficiency problem concerning the properties of specialized network hampers the database- and text-mining-based network construction. This paper presents the concept concerning the computational network expansion, namely for the specific biological network-thiol-disulfide redox regulatory network. Besides, a network-contexted document retrieval system (ncDocReSy) is also introduced to assist the network reduction by providing indirectly relevant literature for user's manual curation. NcDocReSy combines literature search with biological network and ranks the retrieved literature according to the network topology. NcDocReSy is implemented as a Cytoscape plugin. PMID:23427985

Lee, Hang-Mao; Dietz, Karl-Josef; Hofestädt, Ralf

2013-02-01

83

Networks of Machines for Distributed Recursive Computations.  

National Technical Information Service (NTIS)

Distributed computation viewed as a communicating processes is considered. A class of processor networks that admits a homogeneous distribution of processes and trivial routing is described. The problem of implementing a distributed computation is solved ...

A. J. Martin J. L. A. Vandesnepscheut

1985-01-01

84

Neural networks for shortest path computation and routing in computer networks  

Microsoft Academic Search

The application of neural networks to the optimum routing problem in packet-switched computer networks, where the goal is to minimize the network-wide average time delay, is addressed. Under appropriate assumptions, the optimum routing algorithm relies heavily on shortest path computations that have to be carried out in real time. For this purpose an efficient neural network shortest path algorithm that

Mustafa K. Mehmet Ali; Faouzi Kamoun

1993-01-01

85

Computing in context: integrating an embedded computing project into a course on ethical and societal issues  

Microsoft Academic Search

A hands-on embedded computing project is introduced into an undergraduate social sciences course. In the pilot module, nine student teams created working prototypes, using the technology to address social, ecological and ethical issues. The teams included freshman to senior level computer science majors, other technical majors, and non-technical students. Most students became highly engaged in the activity, developed exciting ideas,

Fred G. Martin; Sarah Kuhn

2006-01-01

86

Role of Computer Assisted Instruction (CAI) in an Introductory Computer Concepts Course.  

ERIC Educational Resources Information Center

Discusses the role of computer assisted instruction (CAI) in undergraduate education via a survey of related literature and specific applications. Describes an undergraduate computer concepts course and includes appendices of instructions, flowcharts, programs, sample student work in accounting, COBOL instructional model, decision logic in a…

Skudrna, Vincent J.

1997-01-01

87

The French communicable diseases computer network  

Microsoft Academic Search

The authors give a brief review of a seven-year experiment of national surveillance of communicable diseases in France using computer networking technology. The information system (IS), developed by the French Communicable Diseases Computer Network (FCDN), provides the large amount of epidemiological information needed for surveillance activities and permits the information exchanges necessary for efficient decision making. Besides the surveillance of

Philippe Garnerin; A.-J. Valleron

1992-01-01

88

Aspects of networking in multiplayer computer games  

Microsoft Academic Search

Distributed, real-time multiplayer computer games (MCGs) are in the vanguard of utilizing the networking possibilities. Although related research has been done in military simulations, virtual reality systems, and computer supported cooperative working, the suggested solutions diverge from the problems posed by MCGs. With this in mind, this paper provides a concise overview of four aspects affecting networking in MCGs. First,

Jouni Smed; Timo Kaukoranta; Harri Hakonen

2002-01-01

89

Computing Boolean Functions on Anonymous Networks.  

National Technical Information Service (NTIS)

The bit complexity of computing boolean functions on anonymous networks is studied. Let N be the number of nodes, delta the diameter and d the maximal node degree of the network. For arbitrary, unlabeled networks a general algorithm of polynomial bit comp...

E. Kranakis D. Krizanc J. Vandenberg

1990-01-01

90

A Survey Report on Computer Networks.  

National Technical Information Service (NTIS)

The paper first defines what is meant by a computer network and then looks at the useful user services that can be provided through such a network. It then reviews the design alternatives, both logical and physical, that are available to a network researc...

M. Schneider

1973-01-01

91

Network Based Immunization Against Computer Virus  

Microsoft Academic Search

Different from immunization strategy of single-chipped computer, this paper proposes the network-based immune system which takes the entire network as integrated one by the advantage of collaboration of the network. To grasp the main factors that effect the virus' spreading, the paper first constructs a discrete model for the virus. Based on the model, the paper presents two immune strategies:

Lansheng Han; Fan Hong; Bing Peng

2006-01-01

92

Super-speed computer interfaces and networks  

SciTech Connect

This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Research into super-speed computer interfaces has been directed towards identifying networking requirements from compute-intensive applications that are crucial to DOE programs. In particular, both the DOE Energy Research High Performance Computing Research Centers (HPCRC) and the DOE Defense Programs Accelerated Strategic Computing Initiative (ASCI) have planned applications that will require large increases in network bandwidth. This project was set up to help network researchers identify those networking requirements and to plan the development of such networks. Based on studies, research, and LANL-sponsored workshops, this project helped forge the beginnings for multi-gigabit/sec network research and developments that today is being lead by Los Alamos in the American National Standards Institute (ANSI) 6.4 gigabit/sec specification called HIPPI-6400.

Tolmie, D.E.; St. John, W.; DuBois, D.H. [and others

1997-10-01

93

Airlines Network Optimization using Evolutionary Computation  

NASA Astrophysics Data System (ADS)

In recent years, various networks have come to exist in our surroundings. Not only the internet and airline routes can be thought of as networks: protein interactions are also networks. An “economic network design problem” can be discussed by assuming that a vertex is an economic player and that a link represents some connection between economic players. In this paper, the Airlines network is taken up as an example of an “economic network design problem”, and the Airlines network which the profit of the entire Airlines industry is maximized is clarified. The Airlines network is modeled based on connections models proposed by Jackson and Wolinsky, and the utility function of the network is defined. In addition, the optimization simulation using the evolutionary computation is shown for a domestic airline in Japan.

Inoue, Hiroki; Kato, Yasuhiko; Sakagami, Tomoya

94

Early Adolescent Social Networks and Computer Use.  

ERIC Educational Resources Information Center

A research project was conducted to examine the interactions between the social networks of young adolescents and their computer usage. Particular attention was focused upon whether computers tend to isolate youthful users. Adult anxiety regarding the damaging effects of computers on children was assessed. Parental involvement, orientation to…

Orleans, Myron; Laney, Margaret C.

95

MVNC: A Multiview Network Computer Architecture  

Microsoft Academic Search

In this paper, MVNC, a multiview network computer system for a high usability thin-client computing environment, is introduced. MVNC uses a revised SBC model to offer a new framework for thin client computing. MVNC can be used as a full functional Windows machine, or used as a Linux workstation, or a graphic terminal. Its multiview work style is achieved by

Hongliang Yu; Weimin Zheng; Meiming Shen

2005-01-01

96

Computer network environment planning and analysis  

NASA Technical Reports Server (NTRS)

The GSFC Computer Network Environment provides a broadband RF cable between campus buildings and ethernet spines in buildings for the interlinking of Local Area Networks (LANs). This system provides terminal and computer linkage among host and user systems thereby providing E-mail services, file exchange capability, and certain distributed computing opportunities. The Environment is designed to be transparent and supports multiple protocols. Networking at Goddard has a short history and has been under coordinated control of a Network Steering Committee for slightly more than two years; network growth has been rapid with more than 1500 nodes currently addressed and greater expansion expected. A new RF cable system with a different topology is being installed during summer 1989; consideration of a fiber optics system for the future will begin soon. Summmer study was directed toward Network Steering Committee operation and planning plus consideration of Center Network Environment analysis and modeling. Biweekly Steering Committee meetings were attended to learn the background of the network and the concerns of those managing it. Suggestions for historical data gathering have been made to support future planning and modeling. Data Systems Dynamic Simulator, a simulation package developed at NASA and maintained at GSFC was studied as a possible modeling tool for the network environment. A modeling concept based on a hierarchical model was hypothesized for further development. Such a model would allow input of newly updated parameters and would provide an estimation of the behavior of the network.

Dalphin, John F.

1989-01-01

97

Women Who Learn Computing Like Men: Different Gender Positions on Basic Computer Courses in Adult Education  

ERIC Educational Resources Information Center

This article argues that research on gender and adult learning too often regards men and women as unified and separate groups, and does not take intra-gender variation into account. It presents one possible approach to address this problem, in a study of 142 women and 35 men attending basic computer courses in Swedish municipal adult education…

Salminen-Karlsson, Minna

2009-01-01

98

Interval Computing in Neural Networks: One Layer Interval Neural Networks  

Microsoft Academic Search

\\u000a Several applications need a guaranty of the precision of their numerical data. Important tools which allow control of the\\u000a numerical errors are dealing these data as intervals. This work presents a new approach to use with Interval Computing in Neural Networks, studying the particular case of one layer interval neural networks, which extend Punctual One Layer Neural Networks, and\\u000a try

Raquel Patiño-Escarcina; Benjamín Callejas Bedregal; Aarão Lyra

99

Computer Networking: Approaches to Quality Service Assurance.  

National Technical Information Service (NTIS)

The problem of quality service assurance in a (generalized) computer networking environment is addressed. In the absence of any direct, well-defined, quantitative measure of service quality and reliability, error collection and analysis is the only basis ...

R. B. Stillman

1974-01-01

100

Bringing a large computer network into FOCUS  

SciTech Connect

The development and implementation of the Facility for Operations Control and Utilization Statistics (FOCUS), a new centralized node in the Integrated Computing Network of the Los Alamos National Laboratory is described. FOCUS consists of production control, performance measurement, and network information subsystems. The software engineering practices on which the development was based are discussed, with emphasis on the application of those practices to network systems development.

Morse, N.R.; Thompson, J.L.

1982-01-01

101

COMPRESSIBLE FLOW NETWORK COMPUTER PROGRAM (ANP-622)  

Microsoft Academic Search

BS>The bulk of the analysis and all of the coding (mostly Fortran) are ; presented for the Compressible Flow Network program for the IBM 7O4 and IBM 7090 ; digital computers. Thls program will calculate the flow distribution in non-; isothermal networks containing up to 55 branches, up to 40 internal junctions ; where two or more branches combine, and

Skirvin

1961-01-01

102

Systematic computational prediction of protein interaction networks  

Microsoft Academic Search

Determining the network of physical protein associations is an important first step in developing mechanistic evidence for elucidating biological pathways. Despite rapid advances in the field of high throughput experiments to determine protein interactions, the majority of associations remain unknown. Here we describe computational methods for significantly expanding protein association networks. We describe methods for integrating multiple independent sources of

J. G. Lees; J. K. Heriche; I. Morilla; J. A. Ranea; C. A. Orengo

2011-01-01

103

Computer Generated Holograms for Optical Neural Networks  

Microsoft Academic Search

While numerous artificial neural network (ANN) models have been electronically implemented and simulated by conventional computers, optical technology provides a far superior mechanism for the implementation of large-scale ANNs. The properties of light make it an ideal carrier of data signals. With optics, very large and high speed neural network architectures are possible. Because light is a predictable phenomenon, it

K. Kaikhah; F. Loochan

2001-01-01

104

Neural networks applications to control and computations  

NASA Technical Reports Server (NTRS)

Several interrelated problems in the area of neural network computations are described. First an interpolation problem is considered, then a control problem is reduced to a problem of interpolation by a neural network via Lyapunov function approach, and finally a new, faster method of learning as compared with the gradient descent method, was introduced.

Luxemburg, Leon A.

1994-01-01

105

Computer Based Collaborative Problem Solving for Introductory Courses in Physics  

NASA Astrophysics Data System (ADS)

We discuss collaborative problem solving computer-based recitation style. The course is designed by Lee [1], and the idea was proposed before by Christian, Belloni and Titus [2,3]. The students find the problems on a web-page containing simulations (physlets) and they write the solutions on an accompanying worksheet after discussing it with a classmate. Physlets have the advantage of being much more like real-world problems than textbook problems. We also compare two protocols for web-based instruction using simulations in an introductory physics class [1]. The inquiry protocol allowed students to control input parameters while the worked example protocol did not. We will discuss which of the two methods is more efficient in relation to Scientific Discovery Learning and Cognitive Load Theory. 1. Lee, Kevin M., Nicoll, Gayle and Brooks, Dave W. (2004). ``A Comparison of Inquiry and Worked Example Web-Based Instruction Using Physlets'', Journal of Science Education and Technology 13, No. 1: 81-88. 2. Christian, W., and Belloni, M. (2001). Physlets: Teaching Physics With Interactive Curricular Material, Prentice Hall, Englewood Cliffs, NJ. 3. Christian,W., and Titus,A. (1998). ``Developing web-based curricula using Java Physlets.'' Computers in Physics 12: 227--232.

Ilie, Carolina; Lee, Kevin

2010-03-01

106

The Networked Computer Science Technical Report Library  

Microsoft Academic Search

The Networked Computer Science Technical Report Library (NCSTRL 1 ) is a distributed digital library of research results from computer science departments and laboratories in the USA and abroad. NCSTRL benefits readers, authors, and departments. Researchers throughout the world can use familiar Internet tools (the World Wide Web) to search for, browse, read, and download technical reports from participating institutions.

James R. Davis; Carl Lagoze

1996-01-01

107

Computer Networks as a New Data Base.  

ERIC Educational Resources Information Center

Communication via computer networks is becoming more common each day. The differences between computer-mediated communication and face-to-face communication fall into three categories: (1) temporal factors (asynchronous versus synchronous); (2) spatial factors (geographical context and distance); and (3) social factors (participants, their…

Beals, Diane E.

108

Optimization of an interactive distributive computer network  

NASA Technical Reports Server (NTRS)

The activities under a cooperative agreement for the development of a computer network are briefly summarized. Research activities covered are: computer operating systems optimization and integration; software development and implementation of the IRIS (Infrared Imaging of Shuttle) Experiment; and software design, development, and implementation of the APS (Aerosol Particle System) Experiment.

Frederick, V.

1985-01-01

109

An Advanced Sequence of Computer Courses for Humanities Students: The Penn State Program.  

ERIC Educational Resources Information Center

A series of computer science courses at Pennsylvania State University is designed to meet the needs of undergraduate humanities students who wish to use computers. The first of three integrated courses exposes the student to the range of computer applications in the humanities and teaches him to write nontrivial programs in the PL/1 Programing…

Smith, John B.

110

Evaluating the Effectiveness of Collaborative Computer-Intensive Projects in an Undergraduate Psychometrics Course  

ERIC Educational Resources Information Center

Undergraduate psychometrics classes often use computer-intensive active learning projects. However, little research has examined active learning or computer-intensive projects in psychometrics courses. We describe two computer-intensive collaborative learning projects used to teach the design and evaluation of psychological tests. Course

Barchard, Kimberly A.; Pace, Larry A.

2010-01-01

111

Blackboard as the Learning Management System of a Computer Literacy Course  

Microsoft Academic Search

This study reports the evaluation results of using a learning management system (LMS) in a computer literacy course. The goal of the present study was to explore the usefulness of content delivery and how it helped students in learning computing skills. Using Blackboard as the LMS, 145 undergraduate college students enrolled in a computer literacy course in a large southwestern

Florence Martin

2008-01-01

112

Using Microcomputer Simulations in the Classroom: Examples from Undergraduate and Faculty Computer Literacy Courses.  

ERIC Educational Resources Information Center

Examples of the use of computer simulations in two undergraduate courses, (American Foreign Policy and Introduction to International Politics), and a faculty computer literacy course on simulations and artificial intelligence, are provided in this compilation of various instructional items. A list of computer simulations available for various…

Hart, Jeffrey A.

113

Customizing Network Functions for High Performance Cloud Computing  

Microsoft Academic Search

A new cloud computing architecture introducing customization of network functions based on active network is studied. To flexibly reconfigure the network functions depending on the requirement of each cloud computing environment, network functions are deployed on a virtual machine. Customizable sequences of network functions are essential for cloud computing environments. The content-based packet marking mechanism is introduced to transfer packets

Takahiro Miyamoto; Michiaki Hayashi; Hideaki Tanaka

2009-01-01

114

Profiles of Motivated Self-Regulation in College Computer Science Courses: Differences in Major versus Required Non-Major Courses  

NASA Astrophysics Data System (ADS)

The goal of the present study was to utilize a profiling approach to understand differences in motivation and strategic self-regulation among post-secondary STEM students in major versus required non-major computer science courses. Participants were 233 students from required introductory computer science courses (194 men; 35 women; 4 unknown) at a large Midwestern state university. Cluster analysis identified five profiles: (1) a strategic profile of a highly motivated by-any-means good strategy user; (2) a knowledge-building profile of an intrinsically motivated autonomous, mastery-oriented student; (3) a surface learning profile of a utility motivated minimally engaged student; (4) an apathetic profile of an amotivational disengaged student; and (5) a learned helpless profile of a motivated but unable to effectively self-regulate student. Among CS majors and students in courses in their major field, the strategic and knowledge-building profiles were the most prevalent. Among non-CS majors and students in required non-major courses, the learned helpless, surface learning, and apathetic profiles were the most prevalent. Students in the strategic and knowledge-building profiles had significantly higher retention of computational thinking knowledge than students in other profiles. Students in the apathetic and surface learning profiles saw little instrumentality of the course for their future academic and career objectives. Findings show that students in STEM fields taking required computer science courses exhibit the same constellation of motivated strategic self-regulation profiles found in other post-secondary and K-12 settings.

Shell, Duane F.; Soh, Leen-Kiat

2013-12-01

115

Conference on Computers in Undergraduate Science Education: A Computer-Assisted and Managed Course in Physical Sciences.  

ERIC Educational Resources Information Center

An autonomous multimedia computer-assisted instruction (CAI) general-education physics course was developed and evaluated at Florida State University (FSU). Based on a one-term conventional lecture course which had been given successfully at FSU for several years, the CAI course made use of an IBM 1500 instructional system to guide the student…

Kromhout, O. M.; and Others

116

Program Predicts Time Courses of Human/Computer Interactions  

NASA Technical Reports Server (NTRS)

CPM X is a computer program that predicts sequences of, and amounts of time taken by, routine actions performed by a skilled person performing a task. Unlike programs that simulate the interaction of the person with the task environment, CPM X predicts the time course of events as consequences of encoded constraints on human behavior. The constraints determine which cognitive and environmental processes can occur simultaneously and which have sequential dependencies. The input to CPM X comprises (1) a description of a task and strategy in a hierarchical description language and (2) a description of architectural constraints in the form of rules governing interactions of fundamental cognitive, perceptual, and motor operations. The output of CPM X is a Program Evaluation Review Technique (PERT) chart that presents a schedule of predicted cognitive, motor, and perceptual operators interacting with a task environment. The CPM X program allows direct, a priori prediction of skilled user performance on complex human-machine systems, providing a way to assess critical interfaces before they are deployed in mission contexts.

Vera, Alonso; Howes, Andrew

2005-01-01

117

Integrating psychoeducation in a basic computer skills course for people suffering from social anxiety: participants' experiences  

PubMed Central

We describe a psychoeducational program integrated in a basic computer skills course for participants suffering from social anxiety. The two main aims of the course were: that the participants learn basic computer skills, and that the participants learn to cope better with social anxiety. Computer skills were taught by a qualified teacher. Psychoeducation and cognitive therapy skills, including topics such as anxiety coping, self-accept, and self-regulation, were taught by a clinical psychologist. Thirteen of 16 participants completed the course, which lasted 11 weeks. A qualitative analysis was performed, drawing on observations during the course and on interviews with the participants. The participants were positive about the integration of psychoeducation sessions in the computer course, and described positive outcomes for both elements, including improved computer skills, improved self-esteem, and reduced social anxiety. Most participants were motivated to undertake further occupational rehabilitation after the course.

Lohr, Hildegard D; Rosenvinge, Jan H; Wynn, Rolf

2011-01-01

118

Computing with structured connections networks. Technical report  

SciTech Connect

Rapid advances both in the neurosciences and in computer science are beginning to lead to a new interest in computational models linking animal brains and behavior. In computer science, there is a large and growing body of knowledge about parallel computation and another, largely separate, science of artificial intelligence. The idea of looking directly at massively parallel realizations of intelligent activity promises to be fruitful for the study of both natural and artificial computations. Much attention has been directed towards the biological implications of this interdisciplinary effort, but there are equally important relations with computational theory, hardware and software. This article focuses on the design and use of massively parallel computational models, particularly in artificial intelligence. Much of the recent work on massively parallel computation has been carried out by physicists and examines the emergent behavior of large, unstructured collections of computing units. We are more concerned with how one can design, realize and analyze networks that embody the specific computational structures needed to solve hard problems. Adaptation and learning are treated as ways to improve structured networks, not as a replacement for analysis and design.

Feldman, J.A.; Fanty, M.A.; Goddard, N.; Lynne, K.

1987-04-01

119

Computing matrix inversion with optical networks.  

PubMed

With this paper we bring about a discussion on the computing potential of complex optical networks and provide experimental demonstration that an optical fiber network can be used as an analog processor to calculate matrix inversion. A 3x3 matrix is inverted as a proof-of-concept demonstration using a fiber network containing three nodes and operating at telecomm wavelength. For an NxN matrix, the overall solving time (including setting time of the matrix elements and calculation time of inversion) scales as O(N(2)), whereas matrix inversion by most advanced computer algorithms requires ~O(N(2.37)) computational time. For well-conditioned matrices, the error of the inversion performed optically is found to be around 3%, limited by the accuracy of measurement equipment. PMID:24514991

Wu, Kan; Soci, Cesare; Shum, Perry Ping; Zheludev, Nikolay I

2014-01-13

120

Integrating Wireless Sensor Networks with Computational Grids  

Microsoft Academic Search

Wireless sensor networks (WSNs) have been greatly developed and emerged their significance in a wide range of important applications\\u000a such as ac quisition and process in formation from the physical world. The evolvement of Grid computing has been based on\\u000a coordination of distributed and shared re sources. A Sensor Grid network can integrate these two leading technologies enabling\\u000a real-time sensor

Nikolaos Preve

2010-01-01

121

Systematic computational prediction of protein interaction networks.  

PubMed

Determining the network of physical protein associations is an important first step in developing mechanistic evidence for elucidating biological pathways. Despite rapid advances in the field of high throughput experiments to determine protein interactions, the majority of associations remain unknown. Here we describe computational methods for significantly expanding protein association networks. We describe methods for integrating multiple independent sources of evidence to obtain higher quality predictions and we compare the major publicly available resources available for experimentalists to use. PMID:21572181

Lees, J G; Heriche, J K; Morilla, I; Ranea, J A; Orengo, C A

2011-06-01

122

Meteorological Monitoring And Warning Computer Network  

NASA Technical Reports Server (NTRS)

Meteorological monitoring system (MMS) computer network tracks weather conditions and issues warnings when weather hazards are about to occur. Receives data from such meteorological instruments as wind sensors on towers and lightning detectors, and compares data with weather restrictions specified for outdoor activities. If weather violates restriction, network generates audible and visible alarms to alert people involved in activity. Also displays weather and toxic diffusion data and disseminates weather forecasts, advisories, and warnings to workstations.

Evans, Randolph J.; Dianic, Allan V.; Moore, Lien N.

1996-01-01

123

Interface Message Processors for the ARPA Computer Network.  

National Technical Information Service (NTIS)

The ARPA computer network is a packet-switching store-and-forward communications system designed for use by computers and computer terminals. This report describes aspects of the work in network operation; Terminal IMP access control and accounting; Priva...

1975-01-01

124

Distributed dynamic groups on network computers  

SciTech Connect

Many distributed applications can be solved using mechanisms for selective broadcast communication and data replication within specified subsets of computing hosts, called groups. This dissertation deals with the problem of efficiently organizing dynamic groups on computer networks, especially netcomputers (network computers). Dynamic groups are more effective for large, unreliable communication networks than are static groups. They can be created when required; their membership sets can vary to fit changing needs. Dynamic groups are harder to organize because mechanisms are needed for group creation and termination, and for member recruitment and dismissal. Dynamic groups should be supported by distributed operating systems. Moreover, in distributed systems with a large number of hosts interconnected by an asynchronous communication network, dynamic groups are essential. An architectural framework for a netcomputer is developed here. A netcomputer consists of a large number of hosts embedded in a network of interconnected broadcast media. Its addressing conventions support logical addressing of communication resources over the entire network. The key notion in the uniform netcomputer framework is the importance of the broadcast media as the major communication resource. A netcomputer is an effective distributed system architecture for the support of groups and multicast communication.

Frank, A.J.

1985-01-01

125

Developing a Reliable Methodology for Assessing the Computer Network Operations Threat of North Korea.  

National Technical Information Service (NTIS)

Computer network operations (CNO) can be considered a relatively new phenomenon being encount modern warfare. Computer network operation is comprised of three components, computer network attack computer network exploitation (CNE) , and computer network d...

C. Brown

2004-01-01

126

Techniques for Developing a Syllabus/Website for a Computer Mediated Learning (CML) Course.  

ERIC Educational Resources Information Center

Computer mediated learning (CML) courses can overcome the temporal and spatial obstacles of isolated commuter students with busy schedules. Whether presented online or as an add-on to an on-campus course, the CML course needs a good syllabus. This paper discusses components of a CML syllabus and online activities for students. Typical components…

Bull, Kay Sather; Kimball, Sarah; Stansberry, Susan

127

Enhancing Basic Course Values and Reducing Problems with a Computer-Assisted Student Assessment Center.  

ERIC Educational Resources Information Center

To alleviate problems with course content, procedure, and philosophy identified by basic communication skills students and faculty, the University of Oklahoma developed a computer assisted Student Assessment Center (SAC) as a basic communication course adjunct. The SAC allows students from all sections of the course to take each of the four unit…

Babich, Roger M.

128

Integrated Computer Network for Acute Patient Care  

PubMed Central

Care of the acutely ill hospitalized patient places unusual demands on the practicing physician. Large amounts of physiologic, laboratory and other patient related data must be quickly and efficiently obtained and acted upon. The therapy for these patients is complex and time dependent and must be accurately documented. To help meet these demands an integrated computer network has been established to speed data communications, provide integrated data reporting and assist in medical decision-making. Experience with this computer network and its impact on patient care are discussed.

Gardner, Reed M.; Pryor, T. Allan; Clayton, Paul D.; Evans, R. Scott

1984-01-01

129

Computation of signal delays in RC networks  

NASA Technical Reports Server (NTRS)

A model for signal delay computation in RC networks is presented. The strength of the paradigm is its generality and simplicity. The definition of delay is applicable to RC meshes with potential resistive attenuating paths to ground. The algorithms can also be applied to undriven circuits (static charge sharing) and circuits with initial charge. To compute the delays, each node in the network is explored locally to derive a system of sparse linear equations. The solutions of the system are delay values based on the Elmore time constant at each point in the circuit.

Hidalgo, Juan Carlos; Narendran, Paliath; Chaiken, Seth

1993-01-01

130

On computer vision in wireless sensor networks.  

SciTech Connect

Wireless sensor networks allow detailed sensing of otherwise unknown and inaccessible environments. While it would be beneficial to include cameras in a wireless sensor network because images are so rich in information, the power cost of transmitting an image across the wireless network can dramatically shorten the lifespan of the sensor nodes. This paper describe a new paradigm for the incorporation of imaging into wireless networks. Rather than focusing on transmitting images across the network, we show how an image can be processed locally for key features using simple detectors. Contrasted with traditional event detection systems that trigger an image capture, this enables a new class of sensors which uses a low power imaging sensor to detect a variety of visual cues. Sharing these features among relevant nodes cues specific actions to better provide information about the environment. We report on various existing techniques developed for traditional computer vision research which can aid in this work.

Berry, Nina M.; Ko, Teresa H.

2004-09-01

131

Proceedings of workshop on distributed computing and network.  

National Technical Information Service (NTIS)

'Distributed Computing and Network' is one of hot topics in the field of computing. Recent progress in the computer technology is providing new paradigm for computing even in High Energy Physics. Particularly the workstation based computer system is openi...

F. Abe F. Yuasa

1993-01-01

132

Network virtualization for cloud computing  

Microsoft Academic Search

Cloud computing enables a transparent access to information technology (IT) services such that the users do not need to know\\u000a the location and characteristics of the relevant resources. While IT resource virtualization and service abstraction have\\u000a been widely investigated, data transport within the cloud and its efficient control have not received much attention in the\\u000a technical literature. In fact, connectivity

Fabio Baroncelli; Barbara Martini; Piero Castoldi

2010-01-01

133

Pixel Cinematography: A Lighting Approach for Computer Graphics (SIGGRAPH 96 - Course 30)  

NSDL National Science Digital Library

A set of course notes that teaches aspects of cinematography for computer graphics. It includes topics on scene composition, camera placement and movement, and methods of lighting for creating computer graphics images and animations.

2002-02-28

134

Anonymous Transactions in Computer Networks  

NASA Astrophysics Data System (ADS)

We present schemes for providing anonymous transactions while privacy and anonymity are preserved, providing user anonymous authentication in distributed networks such as the Internet. We first present a practical scheme for anonymous transactions while the transaction resolution is assisted by a Trusted Authority. This practical scheme is extended to a theoretical scheme where a Trusted Authority is not involved in the transaction resolution. Given an authority that generates for each player hard to produce evidence EVID (e. g., problem instance with or without a solution) to each player, the identity of a user U is defined by the ability to prove possession of said evidence. We use Zero-Knowledge proof techniques to repeatedly identify U by providing a proof that U has evidence EVID, without revealing EVID, therefore avoiding identity theft.

Dolev, Shlomi; Kopeetsky, Marina

135

On Pair Rotation in the Computer Science Course  

Microsoft Academic Search

In a course environment, pairing a student with one partner for the entire semester is beneficial, but may not be optimal. The authors conducted a study in two undergraduate level courses to observe the advantages and disadvantages of pair rotation whereby a student pairs with several different students throughout the semester. This paper summarizes teaching staff and student perceptions on

Hema Srikanth; Laurie A. Williams; Eric Wiebe; Carol Miller; Suzanne Balik

2004-01-01

136

Computational Tools for Teaching Graduate Courses in Geotechnical Engineering  

Microsoft Academic Search

The Bologna Process assigns new challenges in higher education and in geotechnical engineering courses in particular. The ECTS (European Credit Transfer System), based on the student workload required to achieve the objectives of a program study, implies reduction of contact hours between teacher and student. In the graduate courses of Civil Engineering and Geological Engineering, at Faculdade de Ciências e

Teresa Santana; Pedro Lamas

137

Computational capabilities of random automata networks for reservoir computing.  

PubMed

This paper underscores the conjecture that intrinsic computation is maximal in systems at the "edge of chaos". We study the relationship between dynamics and computational capability in random Boolean networks (RBN) for reservoir computing (RC). RC is a computational paradigm in which a trained readout layer interprets the dynamics of an excitable component (called the reservoir) that is perturbed by external input. The reservoir is often implemented as a homogeneous recurrent neural network, but there has been little investigation into the properties of reservoirs that are discrete and heterogeneous. Random Boolean networks are generic and heterogeneous dynamical systems and here we use them as the reservoir. A RBN is typically a closed system; to use it as a reservoir we extend it with an input layer. As a consequence of perturbation, the RBN does not necessarily fall into an attractor. Computational capability in RC arises from a tradeoff between separability and fading memory of inputs. We find the balance of these properties predictive of classification power and optimal at critical connectivity. These results are relevant to the construction of devices which exploit the intrinsic dynamics of complex heterogeneous systems, such as biomolecular substrates. PMID:23679474

Snyder, David; Goudarzi, Alireza; Teuscher, Christof

2013-04-01

138

Analytic and simulation methods in computer network design  

Microsoft Academic Search

The Seventies are here and so are computer networks! The time sharing industry dominated the Sixties and it appears that computer networks will play a similar role in the Seventies. The need has now arisen for many of these time-shared systems to share each others' resources by coupling them together over a communication network thereby creating a computer network. The

Leonard Kleinrock

1970-01-01

139

A study to identify predictors of achievement in an introductory computer science course  

Microsoft Academic Search

In the study reported on here, 65 prospective computer or information science majors (47 male, 18 female) worked through a tutorial on the basics of Perl. All actions were recorded and time-stamped, allowing us to investigate the relationship between six factors that we believed would predict performance in an introductory computer science (CS) course (as measured by course grade) and

Sandra Katz; John M. Aronis; David Allbritton; Christine Wilson; Mary Lou Soffa

2003-01-01

140

A concept map approach for introduction to Computer Engineering course curriculum  

Microsoft Academic Search

As in any discipline, in Computer Engineering, students start learning the basic concepts of the discipline in their first year through an Introduction to Computer Engineering course. The topics toughed in this course can be grouped into two. The first group includes simple concepts like binary numbering system, hard disk, memory, and I\\/O devices. In the second group, an introduction

G. Tokdemir; N. E. Cagiltay

2010-01-01

141

THE DEVELOPMENT AND PRESENTATION OF FOUR COLLEGE COURSES BY COMPUTER TELEPROCESSING. FINAL REPORT.  

ERIC Educational Resources Information Center

THIS IS A FINAL REPORT ON THE DEVELOPMENT AND PRESENTATION OF FOUR COLLEGE COURSES BY COMPUTER TELEPROCESSING FROM APRIL 1964 TO JUNE 1967. IT OUTLINES THE PROGRESS MADE TOWARDS THE PREPARATION, DEVELOPMENT, AND EVALUATION OF MATERIALS FOR COMPUTER PRESENTATION OF COURSES IN AUDIOLOGY, MANAGEMENT ACCOUNTING, ENGINEERING ECONOMICS, AND MODERN…

MITZEL, HAROLD E.

142

Happenstance and Compromise: A Gendered Analysis of Students' Computing Degree Course Selection  

ERIC Educational Resources Information Center

The number of students choosing to study computing at university continues to decline this century, with an even sharper decline in female students. This article presents the results of a series of interviews with university students studying computing courses in Australia that uncovered the influence of happenstance and compromise on course

Lang, Catherine

2010-01-01

143

Linking Communication and Software Design Courses for Professional Development in Computer Science  

Microsoft Academic Search

Linked communication and software design courses promote a more intensive and realistic learning environment for computer science stu- dents, especially when they work on real projects for real clients. Our students created web-based, educational software for middle-school math classes. We link communication and software design courses in an attempt to offer computer science students a useful and realistic professional development

W. J. Williamson; Philip H. Sweany

144

A Program of Computational Chemistry Exercises for the First-Semester General Chemistry Course  

ERIC Educational Resources Information Center

The computer systems available for molecular modeling are described, along with a discussion of a molecular modeling program created and supported by computational techniques for the first-semester general chemistry course. Various exercises are listed, which direct the learner from a beginner's course in software practice to more complex…

Feller, Scott E.; Dallinger, Richard F.; McKinney, Paul Caylor

2004-01-01

145

A Survey and Evaluation of Simulators Suitable for Teaching Courses in Computer Architecture and Organization  

ERIC Educational Resources Information Center

Courses in Computer Architecture and Organization are regularly included in Computer Engineering curricula. These courses are usually organized in such a way that students obtain not only a purely theoretical experience, but also a practical understanding of the topics lectured. This practical work is usually done in a laboratory using simulators…

Nikolic, B.; Radivojevic, Z.; Djordjevic, J.; Milutinovic, V.

2009-01-01

146

Computer Networks and Advanced Communications: Weighing the Pros and Cons  

Microsoft Academic Search

One main method for optimizing computer usage is networking. However, for those who are contemplating a change from stand-alone computers to a network system, investigation of actual networks in use presents a paradox: network systems can be highly productive and beneficial, but they can create many complex, frustrating problems. The issue becomes a question of whether the benefits of networking

W. L. Koederitz; B. S. Macon

1993-01-01

147

Water Level Measurement Network Computer File.  

National Technical Information Service (NTIS)

A computer system has been developed to manage the water level measurement network used for hydrologic studies of specific plant areas and the region. Water level data for 150 wells has been entered with a time span ranging from one to 20 years of monthly...

C. W. Krapp L. D. McClain

1982-01-01

148

Water level measurement network computer file  

Microsoft Academic Search

A computer system has been developed to manage the water level measurement network used for hydrologic studies of specific plant areas and the region. Water level data for 150 wells has been entered with a time span ranging from one to 20 years of monthly measurements. Using the flexibility of the Statistical Analysis System (SAS), the data can be retrieved

C. W. Krapp; L. D. McClain

1982-01-01

149

Advanced networks and computing in healthcare  

PubMed Central

As computing and network capabilities continue to rise, it becomes increasingly important to understand the varied applications for using them to provide healthcare. The objective of this review is to identify key characteristics and attributes of healthcare applications involving the use of advanced computing and communication technologies, drawing upon 45 research and development projects in telemedicine and other aspects of healthcare funded by the National Library of Medicine over the past 12?years. Only projects publishing in the professional literature were included in the review. Four projects did not publish beyond their final reports. In addition, the authors drew on their first-hand experience as project officers, reviewers and monitors of the work. Major themes in the corpus of work were identified, characterizing key attributes of advanced computing and network applications in healthcare. Advanced computing and network applications are relevant to a range of healthcare settings and specialties, but they are most appropriate for solving a narrower range of problems in each. Healthcare projects undertaken primarily to explore potential have also demonstrated effectiveness and depend on the quality of network service as much as bandwidth. Many applications are enabling, making it possible to provide service or conduct research that previously was not possible or to achieve outcomes in addition to those for which projects were undertaken. Most notable are advances in imaging and visualization, collaboration and sense of presence, and mobility in communication and information-resource use.

Ackerman, Michael

2011-01-01

150

Computation of Signal Delays in RC Networks.  

National Technical Information Service (NTIS)

A model for signal delay computation in RC networks is presented. The strength of the paradigm is its generality and simplicity. The definition of delay is applicable to RC meshes with potential resistive attenuating paths to ground. The algorithms can al...

J. C. Hidalgo P. Narendran S. Chaiken

1993-01-01

151

Critical Thinking about Literature through Computer Networking.  

ERIC Educational Resources Information Center

A computer-oriented, classroom-based research project was conducted at Thomas Nelson Community College in Hampton, Virginia, to explore the ways in which students in a composition and literature class might use a local area network (LAN) as a catalyst to critical thinking, to construct a decentralized classroom, and to use various forms of…

Long, Thomas L.; Pedersen, Christine

152

Neural networks for computer virus recognition  

Microsoft Academic Search

We have developed a neural network for generic detection of a particular class of computer viruses-the so called boot sector viruses that infect the boot sector of a floppy disk or a hard drive. This is an important and relatively tractable subproblem of generic virus detection. Only about 5% of all known viruses are boot sector viruses, yet they account

G. J. Tesauro; J. O. Kephart; G. B. Sorkin

1996-01-01

153

Reducing the diameters of computer networks  

NASA Technical Reports Server (NTRS)

Three methods of reducing the diameters of computer networks by adding additional processor to processor links under the constraint that no more than one I/O port be added to each processor are discussed. This is equivalent to adding edges to a given graph under the constraint that the degree of any node be increased, at most, by one.

Bokhari, S. H.; Raza, A. D.

1986-01-01

154

Teaching Earth Science through a Computer Network.  

ERIC Educational Resources Information Center

Students at the Lexington School for the Deaf (New York) were immersed in a print environment devoted to the study of earth science, using computers linked into a local area network. Students used databases, a text editor, and electronic mail to receive and submit assignments and messages and to keep logs of daily activities. (JDD)

Reich, Carol F.; And Others

1991-01-01

155

Accelerating commutation circuits in quantum computer networks  

NASA Astrophysics Data System (ADS)

In a high speed and packet-switched quantum computer network, a packet routing delay often leads to traffic jams, becoming a severe bottleneck for speeding up the transmission rate. Based on the delayed commutation circuit proposed in Phys. Rev. Lett. 97, 110502 (2006), we present an improved scheme for accelerating network transmission. For two more realistic scenarios, we utilize the characteristic of a quantum state to simultaneously implement a data switch and transmission that makes it possible to reduce the packet delay and route a qubit packet even before its address is determined. This circuit is further extended to the quantum network for the transmission of the unknown quantum information. The analysis demonstrates that quantum communication technology can considerably reduce the processing delay time and build faster and more efficient packet-switched networks.

Jiang, Min; Huang, Xu; Chen, Xiaoping; Zhang, Zeng-ke

2012-12-01

156

Computational classifiers for predicting the short-term course of Multiple sclerosis  

PubMed Central

Background The aim of this study was to assess the diagnostic accuracy (sensitivity and specificity) of clinical, imaging and motor evoked potentials (MEP) for predicting the short-term prognosis of multiple sclerosis (MS). Methods We obtained clinical data, MRI and MEP from a prospective cohort of 51 patients and 20 matched controls followed for two years. Clinical end-points recorded were: 1) expanded disability status scale (EDSS), 2) disability progression, and 3) new relapses. We constructed computational classifiers (Bayesian, random decision-trees, simple logistic-linear regression-and neural networks) and calculated their accuracy by means of a 10-fold cross-validation method. We also validated our findings with a second cohort of 96 MS patients from a second center. Results We found that disability at baseline, grey matter volume and MEP were the variables that better correlated with clinical end-points, although their diagnostic accuracy was low. However, classifiers combining the most informative variables, namely baseline disability (EDSS), MRI lesion load and central motor conduction time (CMCT), were much more accurate in predicting future disability. Using the most informative variables (especially EDSS and CMCT) we developed a neural network (NNet) that attained a good performance for predicting the EDSS change. The predictive ability of the neural network was validated in an independent cohort obtaining similar accuracy (80%) for predicting the change in the EDSS two years later. Conclusions The usefulness of clinical variables for predicting the course of MS on an individual basis is limited, despite being associated with the disease course. By training a NNet with the most informative variables we achieved a good accuracy for predicting short-term disability.

2011-01-01

157

Piping network model program for small computers  

SciTech Connect

A model of fluid piping networks was developed to aid in solving problems in the recirculating water coolant system at the Portsmouth Gaseous Diffusion Plant. The piping network model can be used to solve steady state problems in which water flow rates and temperatures are to be determined, or in which temperature is an important factor in determining pressure losses. The model can be implemented on desktop computers to perform these calculations as needed to track changing process conditions. The report includes a description of the coolant system, the mathematical development f the computer model, a case study utilizing the model and a listing and sample run of the computer codes. 2 figs., 1 tab.

Kruckenberg, N.E.

1986-07-01

158

Musicomputation: a pilot course exploring a pre-college computer science curriculum  

Microsoft Academic Search

Computer Science and Computational Approaches to Music for Middle School and High School Students, also known as Musicomputation (http:\\/\\/musicomputation.com\\/) was a highly successful course sponsored by the National Science Foundation (IIS-0834034) and first held in June 2008 at New York University. Two NYU professors and two doctoral candidates developed curriculum, gave lectures, and supervised labs introducing computer science and computer

Marilyn C. Cole; Evan Korth; Adam Meyers; Sam Pluta

2009-01-01

159

Experiences with a personal computer network in electrical engineering education  

Microsoft Academic Search

At the ESAT (Electronics, Systems, Automation, Technology) laboratory of the Katholieke Universiteit Leuven in Belgium extensive efforts have been made on the implementation of exercise sessions on a PC network. Since 1986, 13 different exercise sessions of eight different courses take place on the network for 300 students in the last three years of electrical engineering. The courses cover several

J. Vandewalle; D. Reniers; B. De Moor

1990-01-01

160

Parallel Computation of Unsteady Flows on a Network of Workstations  

NASA Technical Reports Server (NTRS)

Parallel computation of unsteady flows requires significant computational resources. The utilization of a network of workstations seems an efficient solution to the problem where large problems can be treated at a reasonable cost. This approach requires the solution of several problems: 1) the partitioning and distribution of the problem over a network of workstation, 2) efficient communication tools, 3) managing the system efficiently for a given problem. Of course, there is the question of the efficiency of any given numerical algorithm to such a computing system. NPARC code was chosen as a sample for the application. For the explicit version of the NPARC code both two- and three-dimensional problems were studied. Again both steady and unsteady problems were investigated. The issues studied as a part of the research program were: 1) how to distribute the data between the workstations, 2) how to compute and how to communicate at each node efficiently, 3) how to balance the load distribution. In the following, a summary of these activities is presented. Details of the work have been presented and published as referenced.

1997-01-01

161

Computational Inference of Neural Information Flow Networks  

PubMed Central

Determining how information flows along anatomical brain pathways is a fundamental requirement for understanding how animals perceive their environments, learn, and behave. Attempts to reveal such neural information flow have been made using linear computational methods, but neural interactions are known to be nonlinear. Here, we demonstrate that a dynamic Bayesian network (DBN) inference algorithm we originally developed to infer nonlinear transcriptional regulatory networks from gene expression data collected with microarrays is also successful at inferring nonlinear neural information flow networks from electrophysiology data collected with microelectrode arrays. The inferred networks we recover from the songbird auditory pathway are correctly restricted to a subset of known anatomical paths, are consistent with timing of the system, and reveal both the importance of reciprocal feedback in auditory processing and greater information flow to higher-order auditory areas when birds hear natural as opposed to synthetic sounds. A linear method applied to the same data incorrectly produces networks with information flow to non-neural tissue and over paths known not to exist. To our knowledge, this study represents the first biologically validated demonstration of an algorithm to successfully infer neural information flow networks.

Smulders, Tom V; Hartemink, Alexander J; Jarvis, Erich D

2006-01-01

162

Fault Tolerant Self-Routing Computer Network Topology.  

National Technical Information Service (NTIS)

This thesis reports on the development and analysis of a new, easily, expandable, highly fault tolerant self-routing computer network topology. The topology applies equally to any general purpose computer networking environment, whether local, metropolita...

T. L. Mitchell

1988-01-01

163

Highly reliable computer network for real time system.  

National Technical Information Service (NTIS)

Many of computer networks have been studied different trends regarding the network architecture and the various protocols that govern data transfers and guarantee a reliable communication among all a hierarchical network structure has been proposed to pro...

F. A. Mohammed A. A. Omar N. M. A. Ayad M. A. I. Madkour M. K. Ibrahim

1988-01-01

164

Parallel drainage network computation on CUDA  

NASA Astrophysics Data System (ADS)

Drainage networks determination from digital elevation models (DEM) has been a widely studied problem in the last three decades. During this time, satellite technology has been improving and optimizing digitalized images, and computers have been increasing their capabilities to manage such a huge quantity of information. The rapid growth of CPU power and memory size has concentrated the discussion of DEM algorithms on the accuracy of their results more than their running times. However, obtaining improved running times remains crucial when DEM dimensions and their resolutions increase. Parallel computation provides an opportunity to reduce run times. Recently developed graphics processing units (GPUs) are computationally fast not only in Computer Graphics but in General Purpose Computation, the so-called GPGPU. In this paper we explore the parallel characteristics of these GPUs for drainage network determination, using the C-oriented language of CUDA developed by NVIDIA. The results are simple algorithms that run on low-cost technology with a high performance response, obtaining CPU improvements of up to 8×.

Ortega, L.; Rueda, A.

2010-02-01

165

An Investigation of Student Practices in Asynchronous Computer Conferencing Courses  

ERIC Educational Resources Information Center

This study investigated the online practices of students enrolled in graduate-level distance education courses. Using interviews and a questionnaire as data sources, the study sought to: (a) identify common practices that students adopt in asynchronous discussions, and (b) gain an understanding of why students adopt them. An analysis of the data…

Peters, Vanessa L.; Hewitt, Jim

2010-01-01

166

Computer Networks teaching by microlearning principles  

NASA Astrophysics Data System (ADS)

In nowadays there are many kinds of problems in the system of higher education. One of them is: everyday students get very huge amount of information. All of them take very big amount of time for a student to understand lesson and it is very hard for him/her to do everything in time. This paper explains a study of work microlearning application for computer networks. It consists of general introduction and purpose.

A, Zhamanov; M, Zhamapor

2013-04-01

167

Presentation and major design aspects of the CYCLADES computer network  

Microsoft Academic Search

A computer network is being developed in France, under government sponsorship, to link about twenty heterogeneous computers located in universities, research and D.P. Centers. Goals are to set up a prototype network in order to foster experiment in various areas, such as: data communications, computer interaction, cooperative research, distributed data bases. The network is intended to be both, an object

Louis Pouzin

1973-01-01

168

Genetic-algorithm-based reliability optimization for computer network expansion  

Microsoft Academic Search

This paper explains the development and implementation of a new methodology for expanding existing computer networks. Expansion is achieved by adding new communication links and computer nodes such that reliability measures of the network are optimized within specified constraints. A genetic algorithm-based computer network expansion methodology (GANE) is developed to optimize a specified objective function (reliability measure) under a given

Anup Kumar; Rakesh M. Pathak; Yash P. Gupta

1995-01-01

169

An Experimental Analysis of Computer-Mediated Instruction and Student Attitudes in a Principles of Financial Accounting Course.  

ERIC Educational Resources Information Center

Accounting students received either traditional instruction (n=46) or used computer-mediated communication and WebCT course management software. There were no significant differences in attitudes about the course. However, computer users were more positive about course delivery and course management tools. (Contains 17 references.) (SK)

Basile, Anthony; D'Aquila, Jill M.

2002-01-01

170

Research on Application Data Mining to Teaching of Basic Computer Courses in Universities  

Microsoft Academic Search

With the rapid development of information technology, computer technology has been getting more widely used in daily life, thus, it is necessary for each university graduates grasp basic technical skills of computers. However, usually a teacher will be responsible for teaching many college students basic computer courses, so it is difficult to ensure the quality of the teaching with the

Ye Zhiwei; Hu Zhengbing; Chen Hongwei; Liu Wei

2010-01-01

171

Restructuring Classroom Interaction with Networked Computers: Effects on Quantity and Characteristics of Language Production.  

ERIC Educational Resources Information Center

This study examined the use of Daedalus InterChange, a local area computer network application, to facilitate communicative language use among college students in two elementary French courses. It found that students had more turns and used a greater variety of discourse functions when working in InterChange than they did in their oral…

Kern, Richard G.

1995-01-01

172

Performamatics: Experiences with Connecting a Computer Science Course to a Design Arts Course  

Microsoft Academic Search

Our work is based on a partnership betweenthe a Computer Science(CS) and Art, Music, and English departments in the area of exhibition and performance technologies. We define these areas broadly to encompass all CS applications in the creative and performing arts. These areas not only resonate with today's media-rich culture, but reinforce the fact that virtually all computer applications now

Jesse M. Heines; Jim Jeffers; Sarah Kuhn

173

Neural network computer simulation of medical aerosols.  

PubMed

Preliminary investigations have been conducted to assess the potential for using artificial neural networks to simulate aerosol behaviour, with a view to employing this type of methodology in the evaluation and design of pulmonary drug-delivery systems. Details are presented of the general purpose software developed for these tasks; it implements a feed-forward back-propagation algorithm with weight decay and connection pruning, the user having complete run-time control of the network architecture and mode of training. A series of exploratory investigations is then reported in which different network structures and training strategies are assessed in terms of their ability to simulate known patterns of fluid flow in simple model systems. The first of these involves simulations of cellular automata-generated data for fluid flow through a partially obstructed two-dimensional pipe. The artificial neural networks are shown to be highly successful in simulating the behaviour of this simple linear system, but with important provisos relating to the information content of the training data and the criteria used to judge when the network is properly trained. A second set of investigations is then reported in which similar networks are used to simulate patterns of fluid flow through aerosol generation devices, using training data furnished through rigorous computational fluid dynamics modelling. These more complex three-dimensional systems are modelled with equal success. It is concluded that carefully tailored, well trained networks could provide valuable tools not just for predicting but also for analysing the spatial dynamics of pharmaceutical aerosols. PMID:8832491

Richardson, C J; Barlow, D J

1996-06-01

174

Evaluation of the Effectiveness of a Web-Based Learning Design for Adult Computer Science Courses  

ERIC Educational Resources Information Center

This paper reports on work undertaken within a pilot study concerned with the design, development, and evaluation of online computer science training courses. Drawing on recent developments in e-learning technology, these courses were structured around the principles of a learner-oriented approach for use with adult learners. The paper describes a…

Antonis, Konstantinos; Daradoumis, Thanasis; Papadakis, Spyros; Simos, Christos

2011-01-01

175

Discussing Course Literature Online: Analysis of Macro Speech Acts in an Asynchronous Computer Conference  

ERIC Educational Resources Information Center

This paper presents a macro speech act analysis of computer-mediated conferencing on a university course on language pedagogy. Students read scholarly articles on language learning and discussed them online, in order to make sense of them collaboratively in preparation for a reflective essay. The study explores how the course participants made use…

Kosunen, Riitta

2009-01-01

176

Educational Impact of Digital Visualization Tools on Digital Character Production Computer Science Courses  

ERIC Educational Resources Information Center

Digital character production courses have traditionally been taught in art departments. The digital character production course at the University of Utah is centered, drawing uniformly from art and engineering disciplines. Its design has evolved to include a synergy of computer science, functional art and human anatomy. It gives students an…

van Langeveld, Mark Christensen

2009-01-01

177

Development of a Traditional/Computer-aided Graphics Course for Engineering Technology.  

ERIC Educational Resources Information Center

Describes a two-semester-hour freshman course in engineering graphics which uses both traditional and computerized instruction. Includes course description, computer graphics topics, and recommendations. Indicates that combining interactive graphics software with development of simple programs gave students a better foundation for upper-division…

Anand, Vera B.

1985-01-01

178

A Computational-Modeling Course for Undergraduate Students in Chemical Technology  

ERIC Educational Resources Information Center

The PC-based software technology, a computational-modeling course, for undergraduate chemistry students helps them to understand the molecular modeling in a better way. This course would be able to accommodate a wider array of topics and a greater depth of theory as the modeling is increasingly incorporated into the chemistry curriculum.

Hessley, Rita K.

2004-01-01

179

Affective Learning in Online Multimedia and Lecture Versions of an Introductory Computing Course  

ERIC Educational Resources Information Center

This study evaluated students' affective learning in an introductory computing course that was taught in Hong Kong once in a lecture format and twice in a rich interactive multimedia online format to 414 college students in all. A simplified experience sampling method was used to assess affective learning at the midterm and end of each course in…

Moneta, Giovanni B.; Kekkonen-Moneta, Synnove S.

2007-01-01

180

A Matched-Pairs Study of Interactive Computer Laboratory Activities in a Liberal Arts Math Course  

ERIC Educational Resources Information Center

This paper details the culmination of a large, multi-year study on the effects of an interactive computer laboratory component in a large liberal arts math course at a state university. After several semesters of piloting these laboratory activities in the course, one of two sections, taught by the same senior instructor, was randomly selected to…

Butler, Frederick; Butler, Melanie

2011-01-01

181

Writing to Learn, Writing to Think in a Computer Course for Preservice Teachers.  

ERIC Educational Resources Information Center

Reviews literature on writing across the curriculum and describes its application in a computers for teachers course at the College of Charleston (South Carolina). The article describes the course requirements and purpose, writing assignments, the exam essay, and the relationship of writing assignments to teaching techniques. (SM)

Coleman, Eve B.

1992-01-01

182

Learning Motivation in E-Learning Facilitated Computer Programming Courses  

ERIC Educational Resources Information Center

Computer programming skills constitute one of the core competencies that graduates from many disciplines, such as engineering and computer science, are expected to possess. Developing good programming skills typically requires students to do a lot of practice, which cannot sustain unless they are adequately motivated. This paper reports a…

Law, Kris M. Y.; Lee, Victor C. S.; Yu, Y. T.

2010-01-01

183

Computational drug repositioning through heterogeneous network clustering  

PubMed Central

Background Given the costly and time consuming process and high attrition rates in drug discovery and development, drug repositioning or drug repurposing is considered as a viable strategy both to replenish the drying out drug pipelines and to surmount the innovation gap. Although there is a growing recognition that mechanistic relationships from molecular to systems level should be integrated into drug discovery paradigms, relatively few studies have integrated information about heterogeneous networks into computational drug-repositioning candidate discovery platforms. Results Using known disease-gene and drug-target relationships from the KEGG database, we built a weighted disease and drug heterogeneous network. The nodes represent drugs or diseases while the edges represent shared gene, biological process, pathway, phenotype or a combination of these features. We clustered this weighted network to identify modules and then assembled all possible drug-disease pairs (putative drug repositioning candidates) from these modules. We validated our predictions by testing their robustness and evaluated them by their overlap with drug indications that were either reported in published literature or investigated in clinical trials. Conclusions Previous computational approaches for drug repositioning focused either on drug-drug and disease-disease similarity approaches whereas we have taken a more holistic approach by considering drug-disease relationships also. Further, we considered not only gene but also other features to build the disease drug networks. Despite the relative simplicity of our approach, based on the robustness analyses and the overlap of some of our predictions with drug indications that are under investigation, we believe our approach could complement the current computational approaches for drug repositioning candidate discovery.

2013-01-01

184

Videoteletraining Delivery of a Quality Assurance Course with a Computer Laboratory.  

National Technical Information Service (NTIS)

A Quality Assurance (QA) course containing a student computer laboratory was delivered by videoteletraining (VTT). Two primary treatment groups were compared during four class convenings with a total of 100 students: (1) a VTT local classroom with an inst...

C. D. Wetzel H. L. Pugh N. VanMatre S. W. Parchman

1996-01-01

185

Computer-Managed Instruction Produces Better Learning in an Introductory Psychology Course.  

National Technical Information Service (NTIS)

An experiment in an introductory psychology course investigated whether gains in final exam performance, similar to those reported in the personalized system of instruction (PSI) literature, could be obtained by substituting a computer for human proctors....

J. H. Roll R. M. Pasen

1977-01-01

186

Analysis and implementation of cloud computing network structure  

NASA Astrophysics Data System (ADS)

Cloud computing network is a comprehensive network system with high performance and super service capability, which mainly integrated with several relative low-cost network entities through cloud computing technology. Through research of technology of network task classification scheduling and network load balance cluster, we integrate effectively with this two kinds of technologies and meet the basic requirement of cloud computing network preliminary. System test result shows that task classification scheduling is more efficient and stable. Load balance cluster, which implemented by virtual VIP technology, can bear a large number of concurrent network access and access more efficiently.

Ju, Hongyao; Wang, Rui

2010-12-01

187

Assessing Activity-Based Learning for a Networked Course.  

ERIC Educational Resources Information Center

Describes a qualitative study of student and tutor perspectives on the assessment of an innovative undergraduate course at the Open University (United Kingdom), which has employed an activity-based approach. Discusses the relationship between assessment, student participation, and the development of skills, and outlines the priorities for the…

McDonald, Janet; Twining, Peter

2002-01-01

188

The Effects of Cognitive Learning Style and Prior Computer Experience on Taiwanese College Students' Computer Self-Efficacy in Computer Literacy Courses  

ERIC Educational Resources Information Center

This study examines the influences of learners' characteristics on the development of computer self-efficacy using the GOMS (goal, operators, methods, and selection rules) model. Students' learning style, prior computer course experience, and computer self-efficacy were measured in the pretest, and computer self-efficacy was measured in the…

Shiue, Ya-Ming

2003-01-01

189

Interface Message Processors for the ARPA Computer Network.  

National Technical Information Service (NTIS)

The basic function of the IMP computer network is to allow large existing time-shared (Host) computers with different system configurations to communicate with each other. Each IMP (Interface Message Processor) computer accepts messages for its Host from ...

F. E. Heart

1970-01-01

190

Neural networks for convex hull computation.  

PubMed

Computing convex hull is one of the central problems in various applications of computational geometry. In this paper, a convex hull computing neural network (CHCNN) is developed to solve the related problems in the N-dimensional spaces. The algorithm is based on a two-layered neural network, topologically similar to ART, with a newly developed adaptive training strategy called excited learning. The CHCNN provides a parallel online and real-time processing of data which, after training, yields two closely related approximations, one from within and one from outside, of the desired convex hull. It is shown that accuracy of the approximate convex hulls obtained is around O[K(-1)(N-1/)], where K is the number of neurons in the output layer of the CHCNN. When K is taken to be sufficiently large, the CHCNN can generate any accurate approximate convex hull. We also show that an upper bound exists such that the CHCNN will yield the precise convex hull when K is larger than or equal to this bound. A series of simulations and applications is provided to demonstrate the feasibility, effectiveness, and high efficiency of the proposed algorithm. PMID:18255663

Leung, Y; Zhang, J S; Xu, Z B

1997-01-01

191

Using Type II Computer Network Technology To Reach Distance Students.  

ERIC Educational Resources Information Center

This article, in a series on computer technology and distance education, focuses on "Type II Technology," courses using textbooks and course guides for primary delivery, but enhancing them with computer conferencing as the main vehicle of instructional communication. Discusses technology proficiency, maximizing learning in conferencing…

Eastmond, Dan; Granger, Dan

1998-01-01

192

Artificial Kohonen's neural networks for computer capillarometry  

NASA Astrophysics Data System (ADS)

Analysis of disorders in microhemocirculation appearing during development of various genesis pathological processes allows to manifest their start-up and pathogenic mechanisms. Numerical estimation of capillary and arteriolar-veinular bed parameters gives a possibility to predict development of these states. Automatically controlled estimation of even simple parameters of microhemocirculation bed, such as vessel length in the eye conjuctiva, their amount, size, winding, etc., allows to speak about a new method in the express diagnostics of computer capillarometry. The present work is devoted to the methods of automated determination of microvessel length. The problem is solved by application of one-dimension Kohonen's networks for adaptive uniform piecewise approximation of capillary images. Kohonen's units are the approximation points, and their position is set during the self-organization of the neural network.

Doncow, Sergey; Orbachevskyi, Leonid; Birukow, Valentin; Stepanova, Nina V.

1998-04-01

193

A programming course in bioinformatics for computer and information science students.  

PubMed

We have created a course entitled "Representations and Algorithms for Computational Molecular Biology" with three specific goals in mind. First, we want to provide a technical introduction for computer science and medical information science students to the challenges of computing with molecular biology data, particularly the advantages of having easy access to real-world data sets. Second, we want to equip the students with the skills required of productive research assistants in molecular biology computing research projects. Finally, we want to provide a showcase for local investigators to describe their work in the context of a course that provide adequate background information. In order to achieve these goals, we have created a programming course, in which three major projects and six smaller assignments are assigned during the quarter. We stress fundamental representations and algorithms during the first part of the course in lectures given by the core faculty, and then have more focused lectures in which faculty research interests are highlighted. The course stressed issues of structural molecular biology, in order to better motivate the critical issues in sequence analysis. The culmination of the course was a challenge to the students to use a version of protein threading to predict which members of a set of unknown sequences were globins. The course was well received, and has been made a core requirement in the Medical Information Sciences program. PMID:9390224

Altman, R B; Koza, J

1996-01-01

194

Visualizing trends in student performance across computer science courses  

Microsoft Academic Search

ABSTRACT Student retention is an important topic in Computer Science departments across the country. Keeping strong students and helping struggling students perform better are two fun- damental components,of improving retention. Isolating the cause(s) of students leaving the major is an important area of research. We endeavor to explore this problem using a vi- sualization tool to probe student data within

Dana Wortman; Penny Rheingans

2007-01-01

195

Visualizing trends in student performance across computer science courses  

Microsoft Academic Search

Student retention is an important topic in Computer Science departments across the country. Keeping strong students and helping struggling students perform better are two fundamental components of improving retention. Isolating the cause(s) of students leaving the major is an important area of research. We endeavor to explore this problem using a visualization tool to probe student data within the beginning

Dana Wortman; Penny Rheingans

2007-01-01

196

Matrix Transformations in Lower Level Computer Graphics Course.  

ERIC Educational Resources Information Center

Presents computer programs (Applesoft Basic) for: (1) 2-D rotation about any point through any angle; (2) matrix transformation for 2-D rotation; (3) 3-D translation; (4) 3-D rotation; and (5) hyperboloid rotated in 2-D space. Includes background information and sample output for the matrix transformation subroutines. (JN)

Ying, Dao-ning

1982-01-01

197

Effective Tutoring in a PSI Course. Person vs. Computer.  

ERIC Educational Resources Information Center

The use of student proctors or tutors for a Personalized System of Instruction (PSI) has been considered essential; however, the cost of tutorial training programs may be prohibitive. In an attempt to develop an equivalent but less expensive alternative, students (N=219) participated in an evaluation of the use of a VAX computer system as a…

Herrmann, Thom

198

Instructional Material Development for Computer Applications in Adult Business Education Courses. Final Report.  

ERIC Educational Resources Information Center

The goal of this special demonstration project was to develop adult secondary business education courses related to the computer. An additional phase focused on the development of a microcomputer-based program providing the needed computer literacy and applications for its use. An advisory committee identified five areas of instructional need:…

Fort Wayne Community Schools, IN.

199

Design and Delivery of Multiple Server-Side Computer Languages Course  

ERIC Educational Resources Information Center

Given the emergence of service-oriented architecture, IS students need to be knowledgeable of multiple server-side computer programming languages to be able to meet the needs of the job market. This paper outlines the pedagogy of an innovative course of multiple server-side computer languages for the undergraduate IS majors. The paper discusses…

Wang, Shouhong; Wang, Hai

2011-01-01

200

Computer, Video, and Rapid-Cycling Plant Projects in an Undergraduate Plant Breeding Course.  

ERIC Educational Resources Information Center

Studies the perceived effectiveness of four student projects involving videotape production, computer conferencing, microcomputer simulation, and rapid-cycling Brassica breeding for undergraduate plant breeding students in two course offerings in consecutive years. Linking of the computer conferencing and video projects improved the rating of the…

Michaels, T. E.

1993-01-01

201

Effects of types of active learning activity on two junior-level computer engineering courses  

Microsoft Academic Search

In several computer engineering and computer science courses, it has been observed that active learning activities (ALAs) aid the students in better understanding of the technical material. In this paper, we explore the influence of the type of the ALA and the academic quality of the student on the effectiveness of the technique. We perform the study in two junior

Saurabh Bagchi; Mark C. Johnson; Somali Chaterji

2008-01-01

202

A Novel Use of Computer Simulation in an Applied Pharmacokinetics Course.  

ERIC Educational Resources Information Center

The use of a package of interactive computer programs designed to simulate pharmacokinetic monitoring of drug therapy in a required undergraduate applied pharmacokinetics course is described. Students were assigned the problem of maintaining therapeutic drug concentrations in a computer generated "patient" as an adjunct to classroom instruction.…

Sullivan, Timothy J.

1982-01-01

203

Cloud Computing Services for Seismic Networks  

NASA Astrophysics Data System (ADS)

This thesis describes a compositional framework for developing situation awareness applications: applications that provide ongoing information about a user's changing environment. The thesis describes how the framework is used to develop a situation awareness application for earthquakes. The applications are implemented as Cloud computing services connected to sensors and actuators. The architecture and design of the Cloud services are described and measurements of performance metrics are provided. The thesis includes results of experiments on earthquake monitoring conducted over a year. The applications developed by the framework are (1) the CSN---the Community Seismic Network---which uses relatively low-cost sensors deployed by members of the community, and (2) SAF---the Situation Awareness Framework---which integrates data from multiple sources, including the CSN, CISN---the California Integrated Seismic Network, a network consisting of high-quality seismometers deployed carefully by professionals in the CISN organization and spread across Southern California---and prototypes of multi-sensor platforms that include carbon monoxide, methane, dust and radiation sensors.

Olson, Michael

204

Visualization Techniques for Computer Network Defense  

SciTech Connect

Effective visual analysis of computer network defense (CND) information is challenging due to the volume and complexity of both the raw and analyzed network data. A typical CND is comprised of multiple niche intrusion detection tools, each of which performs network data analysis and produces a unique alerting output. The state-of-the-practice in the situational awareness of CND data is the prevalent use of custom-developed scripts by Information Technology (IT) professionals to retrieve, organize, and understand potential threat events. We propose a new visual analytics framework, called the Oak Ridge Cyber Analytics (ORCA) system, for CND data that allows an operator to interact with all detection tool outputs simultaneously. Aggregated alert events are presented in multiple coordinated views with timeline, cluster, and swarm model analysis displays. These displays are complemented with both supervised and semi-supervised machine learning classifiers. The intent of the visual analytics framework is to improve CND situational awareness, to enable an analyst to quickly navigate and analyze thousands of detected events, and to combine sophisticated data analysis techniques with interactive visualization such that patterns of anomalous activities may be more easily identified and investigated.

Beaver, Justin M [ORNL; Steed, Chad A [ORNL; Patton, Robert M [ORNL; Cui, Xiaohui [ORNL; Schultz, Matthew A [ORNL

2011-01-01

205

Visualization techniques for computer network defense  

NASA Astrophysics Data System (ADS)

Effective visual analysis of computer network defense (CND) information is challenging due to the volume and complexity of both the raw and analyzed network data. A typical CND is comprised of multiple niche intrusion detection tools, each of which performs network data analysis and produces a unique alerting output. The state-of-the-practice in the situational awareness of CND data is the prevalent use of custom-developed scripts by Information Technology (IT) professionals to retrieve, organize, and understand potential threat events. We propose a new visual analytics framework, called the Oak Ridge Cyber Analytics (ORCA) system, for CND data that allows an operator to interact with all detection tool outputs simultaneously. Aggregated alert events are presented in multiple coordinated views with timeline, cluster, and swarm model analysis displays. These displays are complemented with both supervised and semi-supervised machine learning classifiers. The intent of the visual analytics framework is to improve CND situational awareness, to enable an analyst to quickly navigate and analyze thousands of detected events, and to combine sophisticated data analysis techniques with interactive visualization such that patterns of anomalous activities may be more easily identified and investigated.

Beaver, Justin M.; Steed, Chad A.; Patton, Robert M.; Cui, Xiaohui; Schultz, Matthew

2011-05-01

206

Causal Attributions of Success and Failure Made by Undergraduate Students in an Introductory-Level Computer Programming Course  

ERIC Educational Resources Information Center

The purpose of this research is to identify the causal attributions of business computing students in an introductory computer programming course, in the computer science department at Notre Dame University, Louaize. Forty-five male and female undergraduates who completed the computer programming course that extended for a 13-week semester…

Hawi, N.

2010-01-01

207

Hydraulic analysis of piping networks using PIPF computer program  

Microsoft Academic Search

A method to evaluate the flow distribution and pressure balance of hydraulic piping networks is presented. Given a piping network, the PIPF computer program evaluates the fluid flow and velocity in each branch of the network and the pressure at specified points in the network. The program notes all branches to which the system cannot supply a specified flow. The

R. F. Jr

1976-01-01

208

Email networks and the spread of computer viruses  

Microsoft Academic Search

Many computer viruses spread via electronic mail, making use of computer users'email address books as a source for email addresses of new victims. These address books form a directed social network of connections between individuals over which the virus spreads. Here we investigate empirically the structure of this network using data drawn from a large computer installation, and discuss the

M. E. J. Newman; Stephanie Forrest; Justin Balthrop

2002-01-01

209

Mobile Computing and Ubiquitous Networking: Concepts, Technologies and Challenges.  

ERIC Educational Resources Information Center

Analyzes concepts, technologies and challenges related to mobile computing and networking. Defines basic concepts of cellular systems. Describes the evolution of wireless technologies that constitute the foundations of mobile computing and ubiquitous networking. Presents characterization and issues of mobile computing. Analyzes economical and…

Pierre, Samuel

2001-01-01

210

Computer Network Topology Design in Limelight of Pascal Graph Property  

Microsoft Academic Search

Constantly growing demands of high productivity and security of computer\\u000asystems and computer networks call the interest of specialists in the\\u000aenvironment of construction of optimum topologies of computer mediums. In\\u000aearliest phases of design, the study of the topological influence of the\\u000aprocesses that happen in computer systems and computer networks allows to\\u000aobtain useful information which possesses a

Sanjay Kumar Pal; Samar Sen Sarma

2010-01-01

211

Communications Training Courses Across the Leopold Leadership Network  

NASA Astrophysics Data System (ADS)

For nearly fifteen years, the Leopold Leadership Program has provided science communication training and support to mid-career academic environmental researchers from across North America. There has been an emphasis throughout on effective communication to non-scientific audiences. Increasingly, Leopold fellows have been developing communications courses for their own students, responding to the need for future scientists to be able to communicate well with the public, the media, policy makers and other audiences. At a June 2012 reunion meeting, a group of past fellows and communications trainers conducted a curriculum exchange, sharing experiences and ideas for successful inclusion of communications training in environmental science curricula. This presentation will present case studies from several institutions, including the use of podcasting, web columns, social media, in-person presentation and other presentation styles for connecting general audiences. We will share best practices, challenges and recommendations for curriculum development and institutional acceptance.

Hayden, T.; Gerber, L. R.; Silver, W. L.

2012-12-01

212

Computational functions in biochemical reaction networks.  

PubMed Central

In prior work we demonstrated the implementation of logic gates, sequential computers (universal Turing machines), and parallel computers by means of the kinetics of chemical reaction mechanisms. In the present article we develop this subject further by first investigating the computational properties of several enzymatic (single and multiple) reaction mechanisms: we show their steady states are analogous to either Boolean or fuzzy logic gates. Nearly perfect digital function is obtained only in the regime in which the enzymes are saturated with their substrates. With these enzymatic gates, we construct combinational chemical networks that execute a given truth-table. The dynamic range of a network's output is strongly affected by "input/output matching" conditions among the internal gate elements. We find a simple mechanism, similar to the interconversion of fructose-6-phosphate between its two bisphosphate forms (fructose-1,6-bisphosphate and fructose-2,6-bisphosphate), that functions analogously to an AND gate. When the simple model is supplanted with one in which the enzyme rate laws are derived from experimental data, the steady state of the mechanism functions as an asymmetric fuzzy aggregation operator with properties akin to a fuzzy AND gate. The qualitative behavior of the mechanism does not change when situated within a large model of glycolysis/gluconeogenesis and the TCA cycle. The mechanism, in this case, switches the pathway's mode from glycolysis to gluconeogenesis in response to chemical signals of low blood glucose (cAMP) and abundant fuel for the TCA cycle (acetyl coenzyme A). Images FIGURE 3 FIGURE 4 FIGURE 5 FIGURE 7 FIGURE 10 FIGURE 12 FIGURE 13 FIGURE 14 FIGURE 15 FIGURE 16

Arkin, A; Ross, J

1994-01-01

213

Computational Method Speeds Mapping of Cell Signaling Networks  

NSF Publications Database

... Release 05-062Computational Method Speeds Mapping of Cell Signaling Networks Method helps decode ... cell signaling networks are so complex that mapping them has been a slow, arduous process. Now, a ...

214

Computer Aids for the Design of Electric Distribution Networks.  

National Technical Information Service (NTIS)

A set of computer aids for the planning of distribution networks is described. The networks are allowed to contain dispersed generation, and dispersed storage. Direct-control-load-management techniques are also allowed as are indirect techniques such as t...

P. C. Constantopoulos M. Golibersuch V. Kalyan M. McNitt T. E. Morton

1981-01-01

215

A comparison of the functional modules identified from time course and static PPI network data  

PubMed Central

Background Cellular systems are highly dynamic and responsive to cues from the environment. Cellular function and response patterns to external stimuli are regulated by biological networks. A protein-protein interaction (PPI) network with static connectivity is dynamic in the sense that the nodes implement so-called functional activities that evolve in time. The shift from static to dynamic network analysis is essential for further understanding of molecular systems. Results In this paper, Time Course Protein Interaction Networks (TC-PINs) are reconstructed by incorporating time series gene expression into PPI networks. Then, a clustering algorithm is used to create functional modules from three kinds of networks: the TC-PINs, a static PPI network and a pseudorandom network. For the functional modules from the TC-PINs, repetitive modules and modules contained within bigger modules are removed. Finally, matching and GO enrichment analyses are performed to compare the functional modules detected from those networks. Conclusions The comparative analyses show that the functional modules from the TC-PINs have much more significant biological meaning than those from static PPI networks. Moreover, it implies that many studies on static PPI networks can be done on the TC-PINs and accordingly, the experimental results are much more satisfactory. The 36 PPI networks corresponding to 36 time points, identified as part of this study, and other materials are available at http://bioinfo.csu.edu.cn/txw/TC-PINs.

2011-01-01

216

Computation and control with neural networks  

NASA Astrophysics Data System (ADS)

As energies have increased exponentially with time, so have the size and complexity of accelerators and control systems. Neural networks (NNs) may offer the kinds of improvements in computation and control that are needed to maintain acceptable functionality. For control, their associative characteristics could provide signal conversion or data translation. Because they can do any computation such as least-squares, they can close feedback loops autonomously to provide intelligent control at the point of action rather than at a central location that requires transfers, conversions, hand-shaking and other costly repetitions like input protection. Both computation and control can be integrated on a single chip, a printed circuit or an optical equivalent that is also inherently faster through full parallel operation. For such reasons one expects lower costs and better results. Such systems could be optimized by integrating sensor and signal-processing functions. Distributed nets of such hardware could communicate and provide global monitoring and multiprocessing in various ways, e.g. via token, slotted or parallel rings (or Steiner trees), for compatibility with existing systems. Problems and advantages of this approach, such as an optimal, real-time Turing machine, are discussed. Simple examples are simulated and hardware implemented using discrete elements that demonstrate some basic characteristics of learning and parallelism. Future "microprocessors" are predicted and requested on this basis.

Corneliusen, A.; Terdal, P.; Knight, T.; Spencer, J.

1990-08-01

217

A Short Course in Computational Science and Engineering  

NASA Astrophysics Data System (ADS)

1. Introduction; 2. Octave programming; 3. Installing and running the Dev-C++ programming environment; 4. Introduction to computer and software architecture; 5. Fundamental concepts; 6. Procedural programming basics; 7. An introduction to object-oriented analysis; 8. C++ object-oriented programming syntax; 9. Arrays and matrices; 10. Input and output stream; 11. References; 12. Pointers and dynamic memory allocation; 13. Memory management; 14. The static keyword, multiple and virtual inheritance, templates and the STL library; 15. Creating a Java development environment; 16. Basic Java programming constructs; 17. Java classes and objects; 18. Advanced Java features; 19. Introductory numerical analysis; 20. Linear algebra; 21. Fourier transforms; 22. Differential equations; 23. Monte-Carlo methods; 24. Parabolic partial differential equation solvers; Index.

Yevick, David

2012-05-01

218

A Computer Network Protocol for Library and Information Science Applications. NCLIS/NBS Task Force on Computer Network Protocol.  

ERIC Educational Resources Information Center

This document describes a proposed computer to computer protocol for electronic communication of digital information over a nationwide library bibliographic network. The protocol allows application tasks at one site on the network to converse with application tasks at any other site, regardless of differences in computer architecture or operating…

National Commission on Libraries and Information Science, Washington, DC.

219

Mississippi Curriculum Framework for Computer Information Systems Technology. Computer Information Systems Technology (Program CIP: 52.1201--Management Information Systems & Business Data). Computer Programming (Program CIP: 52.1201). Network Support (Program CIP: 52.1290--Computer Network Support Technology). Postsecondary Programs.  

ERIC Educational Resources Information Center

This document, which is intended for use by community and junior colleges throughout Mississippi, contains curriculum frameworks for two programs in the state's postsecondary-level computer information systems technology cluster: computer programming and network support. Presented in the introduction are program descriptions and suggested course

Mississippi Research and Curriculum Unit for Vocational and Technical Education, State College.

220

Interactive knowledge networks for interdisciplinary course navigation within Moodle  

NSDL National Science Digital Library

Web-based hypermedia learning environments are widely used in modern education and seem particularly well suited for interdisciplinary learning. Previous work has identified guidance through these complex environments as a crucial problem of their acceptance and efficiency. We reasoned that map-based navigation might provide straightforward and effortless orientation. To achieve this, we developed a clickable and user-oriented concept map-based navigation plugin. This tool is implemented as an extension of Moodle, a widely used learning management system. It visualizes inner and interdisciplinary relations between learning objects and is generated dynamically depending on user set parameters and interactions. This plugin leaves the choice of navigation type to the user and supports direct guidance. Previously developed and evaluated face-to-face interdisciplinary learning materials bridging physiology and physics courses of a medical curriculum were integrated as learning objects, the relations of which were defined by metadata. Learning objects included text pages, self-assessments, videos, animations, and simulations. In a field study, we analyzed the effects of this learning environment on physiology and physics knowledge as well as the transfer ability of third-term medical students. Data were generated from pre- and posttest questionnaires and from tracking student navigation. Use of the hypermedia environment resulted in a significant increase of knowledge and transfer capability. Furthermore, the efficiency of learning was enhanced. We conclude that hypermedia environments based on Moodle and enriched by concept map-based navigation tools can significantly support interdisciplinary learning. Implementation of adaptivity may further strengthen this approach.

Peter M Thule (Emory University/Atlanta VA Medical Center); Kathrin Dethleffsen (Ludwig-Maximilians-Universität); Michael Meyer (Ludwig-Maximilians-Universität)

2012-12-01

221

Continuing Dental Education via an Interactive Video Network: Course Development, Implementation and Evaluation.  

ERIC Educational Resources Information Center

Describes the development of a continuing dental education program at the University of Iowa offered via the Iowa Communications Network. Discusses advantages of distance education, including lessening travel time and expense; interactive audio and video technology; participant evaluation; and future possibilities, including offering courses over…

Johnson, Lynn A.; Lohman, Margaret C.; Sharp, Jamie D.; Krenz, T. Scott

2000-01-01

222

Design of a Competitive and Collaborative Learning Strategy in a Communication Networks Course  

ERIC Educational Resources Information Center

In this paper, an educational methodology based on collaborative and competitive learning is proposed. The suggested approach has been successfully applied to an undergraduate communication networks course, which is part of the core curriculum of the three-year degree in telecommunications engineering at the University of Valladolid in Spain. This…

Regueras, L. M.; Verdu, E.; Verdu, M. J.; de Castro, J. P.

2011-01-01

223

Life-Course Events, Social Networks, and the Emergence of Violence among Female Gang Members  

ERIC Educational Resources Information Center

Using data gathered from a multi-year field study, this article identifies specific life-course events shared by gang-affiliated women. Gangs emerge as a cultural adaptation or pro-social community response to poverty and racial isolation. Through the use of a social-network approach, data show that violence dramatically increases in the period…

Fleisher, Mark S.; Krienert, Jessie L.

2004-01-01

224

Quantum Random Networks for Type 2 Quantum Computers.  

National Technical Information Service (NTIS)

Random boolean networks (RBNs) have been studied theoretically and computationally in order to be able to use their remarkable self-healing and large basins of altercation properties as quantum computing architectures, especially focused on problems of ph...

B. Hasslacher, D. L. Allara

2006-01-01

225

Email networks and the spread of computer viruses  

NASA Astrophysics Data System (ADS)

Many computer viruses spread via electronic mail, making use of computer users' email address books as a source for email addresses of new victims. These address books form a directed social network of connections between individuals over which the virus spreads. Here we investigate empirically the structure of this network using data drawn from a large computer installation, and discuss the implications of this structure for the understanding and prevention of computer virus epidemics.

Newman, M. E.; Forrest, Stephanie; Balthrop, Justin

2002-09-01

226

Computer Networks as Social Networks: Collaborative Work, Telework, and Virtual Community  

Microsoft Academic Search

When computer networks link people as well as machines, they become social networks. Such computer-supported social networks (CSSNs) are becoming im- portant bases of virtual communities, computer-supported cooperative work, and telework. Computer-mediated communication such as electronic mail and com- puterized conferencing is usually text-based and asynchronous. It has limited social presence, and on-line communications are often more uninhibited, cre- ative,

Barry Wellman; Janet Salaff; Dimitrina Dimitrova; Laura Garton; Milena Gulia; Caroline Haythornthwaite

1996-01-01

227

Theory VI. Computational Materials Sciences Network (CMSN)  

SciTech Connect

The Computational Materials Sciences Network (CMSN) is a virtual center consisting of scientists interested in working together, across organizational and disciplinary boundaries, to formulate and pursue projects that reflect challenging and relevant computational research in the materials sciences. The projects appropriate for this center involve those problems best pursued through broad cooperative efforts, rather than those key problems best tackled by single investigator groups. CMSN operates similarly to the DOE Center of Excellence for the Synthesis and Processing of Advanced Materials, coordinated by George Samara at Sandia. As in the Synthesis and Processing Center, the intent of the modest funding for CMSN is to foster partnering and collective activities. All CMSN proposals undergo external peer review and are judged foremost on the quality and timeliness of the science and also on criteria relevant to the objective of the center, especially concerning a strategy for partnering. More details about CMSN can be found on the CMSN webpages at: http://cmpweb.ameslab.gov/ccms/CMSN-homepage.html.

Zhang, Z Y

2008-06-25

228

Creation of a Course in Computer Methods and Modeling for Undergraduate Earth Science Programs  

NASA Astrophysics Data System (ADS)

In recent years computer modeling has gained importance in geological research as a means to generate and test hypotheses and to allow simulation of processes in places inaccessible to humans (e.g., outer core fluid dynamics), too slow to permit observation (e.g., erosionally-induced uplift of topography), or too large to facilitate construction of physical models (e.g., faulting on the San Andreas). Entire fields within the Earth sciences now exist in which computer modeling has become the core work of the discipline. Undergraduate geology/Earth science programs have been slow to adapt to this change, and computer science curricular offerings often do not meet geology students' needs. To address these problems, a course in Computer Methods and Modeling in the Earth Sciences is being developed at Vassar College. The course uses the STELLA iconographical box modeling software developed by High Performance Systems, Inc. to teach students the fundamentals of dynamical systems modeling and then builds on the knowledge students have constructed with STELLA to teach introductory computer programming in Fortran. Fully documented and debugged STELLA and Fortran models along with reading lists, answer keys, and course notes are being developed for distribution to anyone interested in teaching a course such as this. Modeling topics include U-Pb concordia/discordia dating techniques, the global phosphorus cycle, Earth's energy balance and temperature, the impact of climate change on a chain of lakes in eastern California, heat flow in permafrost, and flow of ice in glaciers by plastic deformation. The course has been taught twice at Vassar and has been enthusiastically received by students who reported not only that they enjoyed learning the process of modeling, but also that they had a newfound appreciation for the role of mathematics in geology and intended to enroll in more math courses in the future.

Menking, K. M.; Dashnaw, J. M.

2003-12-01

229

A Computer Virus Propagation Model in P2P Networks  

Microsoft Academic Search

Computer viruses are great threats to the operating system and the computer network. In order to handle those emergent situations might appear in the future and make corresponding policies immediately; thorough researches of computer virus propagation are very important and urgently needed. But the spreading methods of computer viruses are different; one simple model is unable to describe all the

Ming Liu; Lansheng Han; Fan Hong; Mengsong Zou

2009-01-01

230

Network Patch Cables Demystified: A Super Activity for Computer Networking Technology  

ERIC Educational Resources Information Center

This article de-mystifies network patch cable secrets so that people can connect their computers and transfer those pesky files--without screaming at the cables. It describes a network cabling activity that can offer students a great hands-on opportunity for working with the tools, techniques, and media used in computer networking. Since the…

Brown, Douglas L.

2004-01-01

231

Measuring Computer Science Knowledge Level of Hungarian Students Specialized in Informatics with Romanian Students Attending a Science Course or a Mathematics-Informatics Course  

ERIC Educational Resources Information Center

An analysis of Information Technology knowledge of Hungarian and Romanian students was made with the help of a self developed web based Informatics Test. The goal of this research is an analysis of the Computer Science knowledge level of Hungarian and Romanian students attending a Science course or a Mathematics-Informatics course. Analysed was…

Kiss, Gabor

2012-01-01

232

Routing Techniques Used in Computer Communication Networks  

Microsoft Academic Search

An overview is provided in this paper of the routing procedures used in a number of operating networks, as well as in two commercial network architectures. The networks include TYMNET, ARPANET, and TRANSPAC. The network architectures discussed are the IBM SNA and the DEC DNA. The routing algorithms all tend to fall in the shortest path class. In the introductory

MISCHA SCHWARTZ; THOMSS E. STERN

1980-01-01

233

MIT OpenCourseWare: Introduction to Computer Science and Programming  

NSDL National Science Digital Library

For those individuals who have yet to experience one of MIT's OpenCourseWare offerings, this is a great place to start. This site provides access to the spring 2011 version of Professor John Guttag's popular "Introduction to Computer Science and Programming." This course is aimed at students with "little or no programming experience," and its goal is to help students feel "justifiably confident of their ability to write small programs that allow them to accomplish useful goals." The materials here include a complete set of lecture videos, resources for each video (such as handouts and slides), recitation videos by the course teaching assistants, and homework problems with sample student solutions. The site also includes self-assessment tools and a Further Study area, which includes collection of links to supplement the course materials.

Guttag, John

2012-05-25

234

An application of a computational ecology model to a routing method in computer networks  

Microsoft Academic Search

The paper proposes a network routing method based on a computational ecology model. The computational ecology model is a mathematical model proposed by B.A. Huberman and T. Hogg (1988), which represents a macro action of multi-agent systems. We formulate routing on a computer network as a resource allocation problem, where packets and links are regarded as agents and resources, respectively.

Tatsushi Yamasaki; Toshimitsu Ushio

2002-01-01

235

Constraint methods for neural networks and computer graphics  

Microsoft Academic Search

Both computer graphics and neural networks are related, in that they model natural phenomena. Physically-based models are used by computer graphics researchers to create realistic, natural animation, and neural models are used by neural network researchers to create new algorithms or new circuits. To exploit successfully these graphical and neural models, engineers want models that fulfill designer-specified goals. These goals

J. Platt

1989-01-01

236

Disruptive technology for private networks and computer backbone  

NASA Astrophysics Data System (ADS)

Optical communication is invading short distance communication (e.g. private networks etc.) as well as the digital computer backplane. Many optical devices have already been developed for these applications and many other newer devices are emerging. Possible optical devices for private networks and computer backplane are reviewed, and their deployment in different applications are also cited.

Awwal, Abdul Ahad S.; Dutta, Achyut K.

2001-12-01

237

Computational Intelligence in Wireless Sensor Networks: A Survey  

Microsoft Academic Search

Wireless sensor networks (WSNs) are networks of distributed autonomous devices that can sense or monitor physical or environmental conditions cooperatively. WSNs face many challenges, mainly caused by communication failures, storage and computational constraints and limited power supply. Paradigms of computational intelligence (CI) have been successfully used in recent years to address various challenges such as data aggregation and fusion, energy

Raghavendra V. Kulkarni; Anna Forster; Ganesh Kumar Venayagamoorthy

2011-01-01

238

JPARSS: A Java Parallel Network Package for Grid Computing  

Microsoft Academic Search

The emergence of high speed wide area networks makes grid computing a reality. However grid applications that need reliable data transfer still have difculties to achieve optimal TCP performance due to network tuning of TCP window size to improve bandwidth and to reduce la- tency on a high speed wide area network. This paper presents a Java package called JPARSS

Jie Chen; Walter Akers; Ying Chen; William A. Watson III

2002-01-01

239

A Study on the Korean Educational Computer Network.  

ERIC Educational Resources Information Center

Future development and operations of the Korean Educational Computer Network are discussed and possible network layout and cost implications are studied. The Aloha System radio communication, telephone lines and satellite systems are considered as possible alternatives to the present network. The availability of telecommunication facilities and…

Ahn, Moon-Suk

240

An Assessment of the "Diploma in Computer Engineering" Course in the Technical Education System in Nepal  

ERIC Educational Resources Information Center

The purpose of this study was to assess the Diploma in Computer Engineering (DCE) courses offered at affiliated schools of the Council for Technical Education and Vocational Training (CTEVT) with a focus on the goals of the curriculum and employment opportunities. Document analysis, questionnaires, focus group discussions and semi-structured…

Basnet, Kul Bahadur; Kim, Jinsoo

2010-01-01

241

The role of hardware courses in the computer science curriculum at small colleges  

Microsoft Academic Search

The purpose of this panel is to examine the role hardware courses play in the Computer Science Curriculum at a Small College. The selected panelists come from different educational backgrounds, represent different types of schools, and outline contrasting points of view on the topic. The goals of the panel are to start a discussion on the relevance and place of

L. Ivanov; J. Mallozzi; R. Nunna; J. Stephan

2002-01-01

242

An evaluation of a required computer-applications course for psychology majors.  

PubMed

This study describes and evaluates a psychology course specifically focused on computer skills for undergraduate psychology majors. Learning by 136 undergraduates was evaluated on a 57-item objective test. Mean posttest scores were significantly higher than the mean pretest scores in all classes across all topic areas. PMID:12061581

Perkins, David; Cozby, P Chris; Cassens, Michael R; Eddy, Rebecca M

2002-04-01

243

Enhancing Learning in Introductory Computer Science Courses through SCALE: An Empirical Study  

ERIC Educational Resources Information Center

The work presented in this paper aims to support and promote the learning process in introductory computer science courses through the Web-based, adaptive, activity-oriented learning environment known as Supporting Collaboration and Adaptation in a Learning Environment (SCALE). The environment engages students actively in the learning process and…

Verginis, I.; Gogoulou, A.; Gouli, E.; Boubouka, M.; Grigoriadou, M.

2011-01-01

244

Development of Online Cognitive and Algorithm Tests as Assessment Tools in Introductory Computer Science Courses  

ERIC Educational Resources Information Center

This paper presents the online cognitive and algorithm tests, which were developed in order to determine if certain cognitive factors and fundamental algorithms correlate with the performance of students in their introductory computer science course. The tests were implemented among Management Information Systems majors from the Philippines and…

Avancena, Aimee Theresa; Nishihara, Akinori; Vergara, John Paul

2012-01-01

245

Synchronous Collaboration in Distance Education: A Case Study on a Computer Science Course  

Microsoft Academic Search

This paper describes our experience with introduction of synchronous collaborative problem solving activities in the frame of a distance learning computer science undergraduate course of the Hellenic Open University (HOU). Groups of students worked collaboratively at a distance in order to build a flowchart of an algorithm to a given problem. The technological and organization issues involved, the first findings

Michalis Nik Xenos; Nikolaos M. Avouris; Vassilis Komis; Dimitris Stavrinoudis; Meletis Margaritis

2004-01-01

246

A Self-Study of Teaching Reform in a University Business Computing Course.  

ERIC Educational Resources Information Center

The author recounts a qualitative investigation of the influence of an open-discourse reform effort on technicism in a college-level computing course which was discontinued when the study was seen to be unethical. A psychology-oriented heuristic inquiry into the causes of this failure resulted in a growing awareness of the importance of art,…

Williams, Mark Campbell

2000-01-01

247

Community College Uses a Video-Game Lab to Lure Students to Computer Courses  

ERIC Educational Resources Information Center

A computer lab has become one of the most popular hangouts at Northern Virginia Community College after officials decided to load its PCs with popular video games, install a PlayStation and an Xbox, and declare it "for gamers only." The goal of this lab is to entice students to take game-design and other IT courses. John Min, dean of business…

Young, Jeffrey R.

2007-01-01

248

Assessing the Impact of a Computer-Based College Algebra Course  

ERIC Educational Resources Information Center

USM piloted the Math Zone in Spring 2007, a computer-based program in teaching MAT 101 and MAT 099 in order to improve student performance. This research determined the effect of the re-design of MAT 101 on student achievements in comparison to a traditional approach to the same course. Meanwhile, the study investigated possible effects of the…

Ye, Ningjun

2010-01-01

249

Applying Computer-Assisted Musical Instruction to Music Appreciation Course: An Example with Chinese Musical Instruments  

ERIC Educational Resources Information Center

This study aims to explore the effectiveness of computer-assisted musical instruction (CAMI) in the Learning Chinese Musical Instruments (LCMI) course. The CAMI software for Chinese musical instruments was developed and administered to 228 students in a vocational high school. A pretest-posttest non-equivalent control group design with three…

Lou, Shi-Jer; Guo, Yuan-Chang; Zhu, Yi-Zhen; Shih, Ru-Chu; Dzan, Wei-Yuan

2011-01-01

250

A Treatment of Computational Precision, Number Representation, and Large Integers in an Introductory Fortran Course  

ERIC Educational Resources Information Center

Computational precision is sometimes given short shrift in a first programming course. Treating this topic requires discussing integer and floating-point number representations and inaccuracies that may result from their use. An example of a moderately simple programming problem from elementary statistics was examined. It forced students to…

Richardson, William H., Jr.

2006-01-01

251

Preliminary experiences with a tablet PC based system to support active learning in computer science courses  

Microsoft Academic Search

There has been much research on the benefits of active and collaborative learning and on its use in computer science courses. As classroom technology becomes more prevalent it is natural to develop systems that support the use of these techniques. We have developed such a system as an extension to Classroom Presenter [2], a Tablet PC-based presentation system. In our

Beth Simon; Ruth E. Anderson; Crystal Hoyer; Jonathan Su

2004-01-01

252

Integration of Major Computer Program Packages into Experimental Courses: A Freshman Experience.  

ERIC Educational Resources Information Center

Describes the use of the Gaussian 70 computer programs to carry out quantum chemical calculations, including single calculations, geometry, optimization, and potential surface scans. Includes a summary of student activities and benefits for students in an honors freshman chemistry course. (SK)

Lipschitz, Irving

1981-01-01

253

Effects of Multidimensional Concept Maps on Fourth Graders' Learning in Web-Based Computer Course  

ERIC Educational Resources Information Center

This study explores the effect of multidimensional concept mapping instruction on students' learning performance in a web-based computer course. The subjects consisted of 103 fourth graders from an elementary school in central Taiwan. They were divided into three groups: multidimensional concept map (MCM) instruction group, Novak concept map (NCM)…

Huang, Hwa-Shan; Chiou, Chei-Chang; Chiang, Heien-Kun; Lai, Sung-Hsi; Huang, Chiun-Yen; Chou, Yin-Yu

2012-01-01

254

Maintaining Pedagogical Integrity of a Computer Mediated Course Delivery in Social Foundations  

ERIC Educational Resources Information Center

Transforming a face to face course to a computer mediated format in social foundations (interdisciplinary field in education), while maintaining pedagogical integrity, involves strategic collaboration between instructional technologists and content area experts. This type of planned partnership requires open dialogue and a mutual respect for prior…

Stewart, Shelley; Cobb-Roberts, Deirdre; Shircliffe, Barbara J.

2013-01-01

255

A Survey of Knowledge Management Skills Acquisition in an Online Team-Based Distributed Computing Course  

ERIC Educational Resources Information Center

This paper investigates students' perceptions of their acquisition of knowledge management skills, namely thinking and team-building skills, resulting from the integration of various resources and technologies into an entirely team-based, online upper level distributed computing (DC) information systems (IS) course. Results seem to indicate that…

Thomas, Jennifer D. E.

2007-01-01

256

Active and Collaborative Learning in an Introductory Electrical and Computer Engineering Course  

ERIC Educational Resources Information Center

Active and collaborative learning instruments were introduced into an introductory electrical and computer engineering course. These instruments were designed to assess specific learning objectives and program outcomes. Results show that students developed an understanding comparable to that of more advanced students assessed later in the…

Kotru, Sushma; Burkett, Susan L.; Jackson, David Jeff

2010-01-01

257

Computer network security management and authentication of smart grids operations  

Microsoft Academic Search

Operations of electricity power systems have recently become more intricate due to development of microgrids, execution of open access competition, and use of network-controlled devices, etc. Computer networks therefore turn into an integral component of modern power-grid operations. This paper proposes a new utility computer network security management and authentication for actions \\/ commands requests in smart-grid operations. This management

Alexander Hamlyn; Helen Cheung; Todd Mander; Lin Wang; Cungang Yang; Richard Cheung

2008-01-01

258

Teacher's Guide to Using Computer Networks for Written Interaction: Classroom Activities for Collaborative Learning with Networked Computers.  

ERIC Educational Resources Information Center

Intended for a broad spectrum of teachers using or considering using computers networks for written interaction, this teacher's guide presents techniques and behaviors that encourage and support learning on a computer classroom environment. The 21 essays that make up the book are written by people involved in the ENFI (Electronic Networks For…

Beil, Don, Ed.

259

Biomolecular Computing by In Vitro Transcriptional Networks.  

National Technical Information Service (NTIS)

This grant supported the initial development of a novel biochemical system, in vitro transcriptional networks, that can be programmed to construct arbitrary circuits. These systems are a simplification of genetic regulatory networks. The foundational theo...

E. Winfree J. Kim S. Lee S. Mohanty K. Shantz

2004-01-01

260

A Computer Network for Social Scientists.  

ERIC Educational Resources Information Center

Describes a microcomputer-based network developed at the University of California Los Angeles to support education in the social sciences. Topics discussed include technological, managerial, and academic considerations of university networking; the use of the network in teaching macroeconomics, social demographics, and symbolic logic; and possible…

Gerber, Barry

1989-01-01

261

Designing Biological Computers: Systemic Computation and Sensor Networks  

Microsoft Academic Search

Biological computation may or may not be Turing Complete, but it is clearly organized differently from traditional von Neumann\\u000a architectures. Computation (whether in a brain or an ant colony) is distributed, self-organising, autonomous and embodied\\u000a in its environments. Systemic computation is a model of computation designed to follow the “biological way” of computation:\\u000a it relies on the notion that systems

Peter J. Bentley

2007-01-01

262

Dynamic computation of network statistics via updating schema.  

PubMed

Given a large network, computing statistics such as clustering coefficient, or modularity, is costly for large networks. When one more edge or vertex is added, traditional methods require that the full (expensive) computation be redone on this slightly modified graph. Alternatively, we introduce here a new approach: under modification to the graph, we update the statistics instead of computing them from scratch. In this paper we provide update schemes for a number of popular statistics, to include degree distribution, clustering coefficient, assortativity, and modularity. Our primary aim is to reduce the computational complexity needed to track the evolving behavior of large networks. As an important consequence, this approach provides efficient methods which may support modeling the evolution of dynamic networks to identify and understand critical transitions. Using the updating scheme, the network statistics can be computed much faster than re-calculating each time that the network evolves. We also note that the update formula can be used to determine which edge or node will lead to the extremal change of network statistics, providing a way of predicting or designing network evolution rules that would optimize some chosen statistic. We present our evolution methods in terms of a network statistics differential notation. PMID:19392027

Sun, Jie; Bagrow, James P; Bollt, Erik M; Skufca, Joseph D

2009-03-01

263

A Novel College Network Resource Management Method using Cloud Computing  

NASA Astrophysics Data System (ADS)

At present information construction of college mainly has construction of college networks and management information system; there are many problems during the process of information. Cloud computing is development of distributed processing, parallel processing and grid computing, which make data stored on the cloud, make software and services placed in the cloud and build on top of various standards and protocols, you can get it through all kinds of equipments. This article introduces cloud computing and function of cloud computing, then analyzes the exiting problems of college network resource management, the cloud computing technology and methods are applied in the construction of college information sharing platform.

Lin, Chen

264

Semantic P2P Networks: Future Architecture of Cloud Computing  

Microsoft Academic Search

When more and more nodes and users are connected in the Internet in the cases of Cloud computing , centralized computing modes will be failed with the limit band width and privacies. P2P technologies may be the future architecture of Cloud computing . This paper introduces a different P2P technology: semantic P2P Network– Virtual Hierarchical Tree Gird Organizations (VIRGO), which

Lican Huang

2011-01-01

265

Using high-performance networks to enable computational aerosciences applications  

NASA Technical Reports Server (NTRS)

One component of the U.S. Federal High Performance Computing and Communications Program (HPCCP) is the establishment of a gigabit network to provide a communications infrastructure for researchers across the nation. This gigabit network will provide new services and capabilities, in addition to increased bandwidth, to enable future applications. An understanding of these applications is necessary to guide the development of the gigabit network and other high-performance networks of the future. In this paper we focus on computational aerosciences applications run remotely using the Numerical Aerodynamic Simulation (NAS) facility located at NASA Ames Research Center. We characterize these applications in terms of network-related parameters and relate user experiences that reveal limitations imposed by the current wide-area networking infrastructure. Then we investigate how the development of a nationwide gigabit network would enable users of the NAS facility to work in new, more productive ways.

Johnson, Marjory J.

1992-01-01

266

Design and Development of a Sample "Computer Programming" Course Tool via Story-Based E-Learning Approach  

ERIC Educational Resources Information Center

This study introduces a story-based e-learning oriented course tool that was designed and developed for using within "computer programming" courses. With this tool, students can easily adapt themselves to the subjects in the context of computer programming principles, thanks to the story-based, interactive processes. By using visually…

Kose, Utku; Koc, Durmus; Yucesoy, Suleyman Anil

2013-01-01

267

Improving Student Performance in a First-Year Geography Course: Examining the Importance of Computer-Assisted Formative Assessment  

ERIC Educational Resources Information Center

The main objective of this paper is to examine the effectiveness of computer-assisted formative assessment in a large, first-year undergraduate geography course. In particular, the paper evaluates the impact of computer-assisted multiple-choice practice tests on student performance in the course as well as student opinions of this type of…

Wilson, Kathi; Boyd, Cleo; Chen, Liwen; Jamal, Sarosh

2011-01-01

268

The Use of a PDP-11/20 Computer in a Non-Calculus General Physics Course.  

ERIC Educational Resources Information Center

Computer-assisted instruction supplements traditional methods in a non-calculus physics course offered at Seattle Pacific College. Thirty-five science majors enrolled in the first quarter and 32 continued in the second term. The hardware for the course consists of a PDP-11/20 computer and eight teletype terminals; additional peripheral equipment…

Yu, David U. L.

269

A One-Credit Hands-On Introductory Course in Electrical and Computer Engineering Using a Variety of Topic Modules  

ERIC Educational Resources Information Center

This paper describes a one-credit laboratory course for freshmen majoring in electrical and computer engineering (ECE). The course is motivational in nature and exposes the students to a wide range of areas of electrical and computer engineering. The authors believe it is important to give freshmen a broad perspective of what ECE is all about, and…

Pierre, J. W.; Tuffner, F. K.; Anderson, J. R.; Whitman, D. L.; Ula, A. H. M. S.; Kubichek, R. F.; Wright, C. H. G.; Barrett, S. F.; Cupal, J. J.; Hamann, J. C.

2009-01-01

270

Syntactic Computations in the Language Network: Characterizing Dynamic Network Properties Using Representational Similarity Analysis  

PubMed Central

The core human capacity of syntactic analysis involves a left hemisphere network involving left inferior frontal gyrus (LIFG) and posterior middle temporal gyrus (LMTG) and the anatomical connections between them. Here we use magnetoencephalography (MEG) to determine the spatio-temporal properties of syntactic computations in this network. Listeners heard spoken sentences containing a local syntactic ambiguity (e.g., “… landing planes …”), at the offset of which they heard a disambiguating verb and decided whether it was an acceptable/unacceptable continuation of the sentence. We charted the time-course of processing and resolving syntactic ambiguity by measuring MEG responses from the onset of each word in the ambiguous phrase and the disambiguating word. We used representational similarity analysis (RSA) to characterize syntactic information represented in the LIFG and left posterior middle temporal gyrus (LpMTG) over time and to investigate their relationship to each other. Testing a variety of lexico-syntactic and ambiguity models against the MEG data, our results suggest early lexico-syntactic responses in the LpMTG and later effects of ambiguity in the LIFG, pointing to a clear differentiation in the functional roles of these two regions. Our results suggest the LpMTG represents and transmits lexical information to the LIFG, which responds to and resolves the ambiguity.

Tyler, Lorraine K.; Cheung, Teresa P. L.; Devereux, Barry J.; Clarke, Alex

2013-01-01

271

Computational models, programming languages and algorithms for sensor networks: towards a paradigm shift in computer science  

Microsoft Academic Search

Physical devices are increasingly regulated by embedded computers rather than analog controllers. Embedded computers are essentially computational engines capable of sensing the environment, actuating physical devices, carrying out data analysis and planning actions. Embedded computers can thus enable machines to become intelligent and autonomous. The next technological revolution will follow from the ability of intelligent machines to network with other

G. Agha

2006-01-01

272

Modeling Computations in a Semantic Network  

Microsoft Academic Search

Semantic network research has seen a resurgence from its early history in the cognitive sciences with the inception of the Semantic Web initiative. The Semantic Web e ort has brought forth an array of technologies that support the encoding, storage, and querying of the semantic network data structure at the world stage. Currently, the popular conception of the Semantic Web

Marko A. Rodriguez; Johan Bollen

2007-01-01

273

1\\/f noise in computer network traffic  

Microsoft Academic Search

A huge number of compum connected together form an international network (Intemet). As a mult of their communication, uains of data packages travel through this network: due to the limited bmsfer rate and the behaviour of data source agents, the aaRc fluctuates. Our measurements show that the power spectrum of the roundaip time tetwem two points on Intemet is llf-like

Istvin Csabai

1994-01-01

274

Phoebus: Network Middleware for Next-Generation Network Computing  

SciTech Connect

The Phoebus project investigated algorithms, protocols, and middleware infrastructure to improve end-to-end performance in high speed, dynamic networks. The Phoebus system essentially serves as an adaptation point for networks with disparate capabilities or provisioning. This adaptation can take a variety of forms including acting as a provisioning agent across multiple signaling domains, providing transport protocol adaptation points, and mapping between distributed resource reservation paradigms and the optical network control plane. We have successfully developed the system and demonstrated benefits. The Phoebus system was deployed in Internet2 and in ESnet, as well as in GEANT2, RNP in Brazil and over international links to Korea and Japan. Phoebus is a system that implements a new protocol and associated forwarding infrastructure for improving throughput in high-speed dynamic networks. It was developed to serve the needs of large DOE applications on high-performance networks. The idea underlying the Phoebus model is to embed Phoebus Gateways (PGs) in the network as on-ramps to dynamic circuit networks. The gateways act as protocol translators that allow legacy applications to use dedicated paths with high performance.

Martin Swany

2012-06-16

275

Gifted Students' Individual Dierences in Computer-Based Algebra and Precalculus Courses  

Microsoft Academic Search

In this article we summarize data from mathematically gifted middle school students working through home-computer-based rst-year algebra, second-year algebra, and precalculus courses. Although these students represented only the extreme upper end of the full range of mathematical ability, they nevertheless dis- played considerable individual variation on all observed outcomes with little relation to psat score, sex or age. About equal

Constance Stillinger; Patrick Suppes

276

Evaluating a Web Lecture Intervention in a Human–Computer Interaction Course  

Microsoft Academic Search

Research using Web lectures to enhance the classroom learning experience in an introductory human-computer interaction course is presented. By using Web lectures to present lecture material before class, more in-class time can be spent engaging students with hands-on learning activities-using class time for more learning by doing, less learning by listening. A quasi-experiment was conducted over a 15-week semester with

Jason A. Day; James D. Foley

2006-01-01

277

Congestion Avoidance in Computer Networks With a Connectionless Network Layer: Concepts, Goals and Methodology  

Microsoft Academic Search

Congestion occurs ill a computer uetwork when the resource demandsexceed the capacity. Packets may be lost due to too lnuch queuingin the uetwork. During cougestion, the network throughput lnay dropand the path delay may become very high. A congestion control scheme}mlps the network to recover froln the congestion state. A congestionavoidance scheme allows a network to operate in the region

Raj Jain; K. K. Ramakrishnan

1987-01-01

278

Computers, Electronic Networking and Education: Some American Experiences.  

ERIC Educational Resources Information Center

Describes new developments in distributed educational computing at Massachusetts Institute of Technology (MIT, "Athena"), Carnegie Mellon University ("Andrew"), Brown University "Intermedia"), Electronic University Network (California), Western Behavioral Sciences Institute (California), and University of California, Irvine. Topics discussed…

McConnell, David

1991-01-01

279

Spreadsheet Analysis Of Queuing In A Computer Network  

NASA Technical Reports Server (NTRS)

Method of analyzing responses of computer network based on simple queuing-theory mathmatical models via spreadsheet program. Effects of variations in traffic, capacities of channels, and message protocols assessed.

Galant, David C.

1992-01-01

280

Annotated Bibliography of the Literature on Resource Sharing Computer Networks.  

National Technical Information Service (NTIS)

The bibliography consists of references with critical annotations to the literature on computer networks. A classification scheme has been developed to place each annotation in a category reflective of its content. Five indexes to the bibliography are inc...

R. P. Blanc I. W. Cotton T. N. Pyke S. W. Watkins

1973-01-01

281

Fuzzy Logic, Neural Networks, and Soft Computing.  

National Technical Information Service (NTIS)

The past few years have witnessed a rapid growth of interest in a cluster of modes of modeling and computation which may be described collectively as soft computing. The distinguishing characteristic of soft computing is that its primary aims are to achie...

L. A. Zadeh

1994-01-01

282

Timestep Stochastic Simulation of Computer Networks using Diffusion Approximation  

Microsoft Academic Search

Timestep stochastic simulation (TSS) is a novel method for generating sample paths of computer networks, with low computation cost independent of packet rates. It has accu- racy adequate to evaluate general network and ow con- gur ations, including arbitrary ow start times and dura- tions, drop-tail queuing (i.e., does not require RED), and arbitrary state-dependent control mechanisms for conges- tion

Andrzej Kochut; A. Udaya Shankar

2006-01-01

283

Electrooptical adaptive switching network for the hypercube computer  

NASA Technical Reports Server (NTRS)

An all-optical network design for the hyperswitch network using regular free-space interconnects between electronic processor nodes is presented. The adaptive routing model used is described, and an adaptive routing control example is presented. The design demonstrates that existing electrooptical techniques are sufficient for implementing efficient parallel architectures without the need for more complex means of implementing arbitrary interconnection schemes. The electrooptical hyperswitch network significantly improves the communication performance of the hypercube computer.

Chow, E.; Peterson, J.

1988-01-01

284

‘CloudCop’: Putting network-admin on cloud nine towards Cloud Computing for Network Monitoring  

Microsoft Academic Search

Computer Network Monitoring is an evergreen field of challenges. The recent advent of Cloud Computing, in the realm of `New Generation Networks', opens a whole new field of envisaging and implementing at least two of its aspects, namely `Software as a Service(SaaS)'and `Platform as a Service(PaaS)' in the field of Network Management(NM). In this paper, we present the design and

Mydhili K Nair; V. Gopalakrishna

2009-01-01

285

The Role of Computer Networks in Aerospace Engineering.  

ERIC Educational Resources Information Center

Presents selected results from an empirical investigation into the use of computer networks in aerospace engineering based on data from a national mail survey. The need for user-based studies of electronic networking is discussed, and a copy of the questionnaire used in the survey is appended. (Contains 46 references.) (LRW)

Bishop, Ann Peterson

1994-01-01

286

The University of Michigan's Computer-Aided Engineering Network.  

ERIC Educational Resources Information Center

Presents an overview of the Computer-Aided Engineering Network (CAEN) of the University of Michigan. Describes its arrangement of workstations, communication networks, and servers. Outlines the factors considered in hardware and software decision making. Reviews the program's impact on students. (ML)

Atkins, D. E.; Olsen, Leslie A.

1986-01-01

287

Computer networks and political participation: Santa Monica's teledemocracy project  

Microsoft Academic Search

New communication technologies have been touted as a way to improve political participation by facilitating the flow of political information and opinion between citizens and their leaders. A project in Santa Monica, California, broke new ground for teledemocracy experiments with Public Electronic Network (PEN), the first government?sponsored computer network intended as a supplemental channel of communication between a city government

Patrick B. OSullivan

1995-01-01

288

Stochastic Estimation and Control of Queues within a Computer Network.  

National Technical Information Service (NTIS)

An extended Kalman filter is used to estimate size and packet arrival rate of network queues. These estimates are used by a LQG steady state linear perturbation PI controller to regulate queue size within a computer network. This paper presents the deriva...

N. C. Stuckey

2007-01-01

289

Scalable SNMP-based monitoring systems for network computing  

Microsoft Academic Search

Traditional centralized monitoring systems (MS) do not scale to emerging large network computing systems (NCS) with varying participating nodes, sizable network distances and unpredictable delays. The manager, a single point of control and information gathering, becomes a bottleneck resulting in increased delays and overheads. ^ In this research, the scalability problem is addressed using an architectural approach within the SNMP

Rajesh Subramanyan

2002-01-01

290

Self-organized criticality in a computer network model  

Microsoft Academic Search

We study the collective behavior of computer network nodes by using a cellular automaton model. The results show that when the load of network is constant, the throughputs and buffer contents of nodes are power-law distributed in both space and time. Also the feature of 1\\/f noise appears in the power spectrum of the change of the number of nodes

Jian Yuan; Yong Ren; Xiuming Shan

2000-01-01

291

Hybrid Technique for Simulating High Bandwidth Delay Computer Networks  

Microsoft Academic Search

Researchers evaluate and contrast new network routing, admission control, congestion control and flow control algorithms through simulation. Analytically de-rived arguments justifiably lack credibility because, in the attempt to model the underlying physical system, the analyst is forced to make compromising approximations. However, unlike analytical techniques like Jackson Queueing Networks, simulations require significant computation and a simulation's state can consume a

Jong-suk Ahn; Peter B. Danzig; Deborah Estrin; Brenda Timmerman

1993-01-01

292

Student performance in computer modeling and problem solving in a modern introductory physics course  

NASA Astrophysics Data System (ADS)

Matter & Interactions, an innovative introductory physics curriculum developed by Ruth Chabay and Bruce Sherwood, emphasizes computer modeling and fundamental physical principles. Two think-aloud protocol studies were conducted to investigate the performance of students from this curriculum in solving physics problems that require computer modeling. Experiment 1 examined whether Matter & Interactions students would, given the choice, use computer modeling to solve difficult problems that required predicting motion, and how their solution approaches differed from those of students from a traditional introductory physics course. Though they did not overwhelmingly choose computer modeling, some M&I students did write computer models successfully or apply the iterative algorithm by hand. The solution approaches of M&I students and traditional course students differed qualitatively in their use of the momentum principle and pre-derived special case formulas. In experiment 2, Matter & Interactions students were observed while they wrote programs in the VPython language in order to examine their difficulties with computer modeling. Areas of difficulty included determining initial conditions, distinguishing between simulated time and the time step, and updating momentum and position. Especially troublesome for students was the multistep procedure for calculating a force that changes with time. Students' understanding of the structure of a computer model improved by the end of the semester as shown by their performance on a line sorting task. Students with fewer difficulties proceeded through the computer model in a more linear, straightforward fashion. Instruction was revised based on initial findings from the first phase of the experiment. Students in the second phase of the experiment, who had used the revised instruction, had fewer difficulties on the same tasks, though other factors may have been involved in the improvement.

Kohlmyer, Matthew Adam

293

Topological properties of robust biological and computational networks.  

PubMed

Network robustness is an important principle in biology and engineering. Previous studies of global networks have identified both redundancy and sparseness as topological properties used by robust networks. By focusing on molecular subnetworks, or modules, we show that module topology is tightly linked to the level of environmental variability (noise) the module expects to encounter. Modules internal to the cell that are less exposed to environmental noise are more connected and less robust than external modules. A similar design principle is used by several other biological networks. We propose a simple change to the evolutionary gene duplication model which gives rise to the rich range of module topologies observed within real networks. We apply these observations to evaluate and design communication networks that are specifically optimized for noisy or malicious environments. Combined, joint analysis of biological and computational networks leads to novel algorithms and insights benefiting both fields. PMID:24789562

Navlakha, Saket; He, Xin; Faloutsos, Christos; Bar-Joseph, Ziv

2014-07-01

294

Applications of bio-inspired computational intelligence in optical networks  

NASA Astrophysics Data System (ADS)

Computational intelligence techniques have appeared as efficient alternatives to solve complex problems, such as in optimization of multi-objective problems. These techniques have been used to solve hard problems in optical networks, such as the impairment-aware routing and wavelength assignment problem, the design of the physical and the logical topology, and the placement of high cost devices along the network where necessary, such as regenerators and wavelength converters. This paper presents some examples of the use of evolutionary computation, swarm intelligence and neurocomputing to solve these optical network problems.

Martins Filho, Joaquim F.; Bastos Filho, Carmelo J. A.; Chaves, Daniel A. R.

2012-12-01

295

Perceptions of teaching and learning automata theory in a college-level computer science course  

NASA Astrophysics Data System (ADS)

This dissertation identifies and describes student and instructor perceptions that contribute to effective teaching and learning of Automata Theory in a competitive college-level Computer Science program. Effective teaching is the ability to create an appropriate learning environment in order to provide effective learning. We define effective learning as the ability of a student to meet instructor set learning objectives, demonstrating this by passing the course, while reporting a good learning experience. We conducted our investigation through a detailed qualitative case study of two sections (118 students) of Automata Theory (CS 341) at The University of Texas at Austin taught by Dr. Lily Quilt. Because Automata Theory has a fixed curriculum in the sense that many curricula and textbooks agree on what Automata Theory contains, differences being depth and amount of material to cover in a single course, a case study would allow for generalizable findings. Automata Theory is especially problematic in a Computer Science curriculum since students are not experienced in abstract thinking before taking this course, fail to understand the relevance of the theory, and prefer classes with more concrete activities such as programming. This creates a special challenge for any instructor of Automata Theory as motivation becomes critical for student learning. Through the use of student surveys, instructor interviews, classroom observation, material and course grade analysis we sought to understand what students perceived, what instructors expected of students, and how those perceptions played out in the classroom in terms of structure and instruction. Our goal was to create suggestions that would lead to a better designed course and thus a higher student success rate in Automata Theory. We created a unique theoretical basis, pedagogical positivism, on which to study college-level courses. Pedagogical positivism states that through examining instructor and student perceptions of teaching and learning, improvements to a course are possible. These improvements can eventually develop a "best practice" instructional environment. This view is not possible under a strictly constructivist learning theory as there is no way to teach a group of individuals in a "best" way. Using this theoretical basis, we examined the gathered data from CS 341. (Abstract shortened by UMI.)

Weidmann, Phoebe Kay

296

Policy Issues in Computer Networks: Multi-Access Information Systems.  

ERIC Educational Resources Information Center

As computer databases become more publicly accessible through public networks, there is a growing need to provide effective protection for proprietary information. Without adequate assurances that their works will be protected, authors and other copyright owners may be reluctant to allow the full text of their works to be accessed through computer

Lyons, Patrice A.

297

Modeling computer and web attitudes using neural networks  

Microsoft Academic Search

The paper aims to suggest models for predicting computer and Web attitudes using artificial neural networks with an additional support of standard statistics in data preparation and feature selection. Based on previously confirmed statistical instruments CAS and WAS, three models were designed. The first two models observed computer and Web attitudes separately, while both attitudes were observed in the third

Marijana Zekic-Susac; Jasna Horvat

2005-01-01

298

BECUN. The Educational Computer User's Network at Battelle.  

ERIC Educational Resources Information Center

The Educational Computer User's Network at Battelle Columbus Laboratories is a cooperative computer center effort between a group of Ohio colleges, secondary schools, and a large research-oriented organization. This description of the program includes the historical background, program concept, data processing development, hardware and software,…

Battelle Memorial Inst., Columbus, OH.

299

The organization of computer resources into a packet radio network  

Microsoft Academic Search

In this paper, we describe the use of packet radio communication for organizing computer resources into a computer communications network. A system to demonstrate the packet radio concept is being developed by the Advanced Research Projects Agency with initial testing in the San Francisco area beginning in 1975. The attributes of this system are presented and its application to mobile

Robert E. Kahn

1975-01-01

300

TCP computational energy cost within wireless Mobile Ad Hoc Network  

Microsoft Academic Search

In this paper, we present the results from a detailed energy measurement study of different TCP variants when used in Mobile Ad hoc Network environments. More precisely, we focus on the node-level cost of the TCP protocol; also know as the computational energy cost. In fact, the computational energy consumption is the most important part of TCP energy consumption. This

Alaa SEDDIK-GHALEB; Yacine GHAMRI-DOUDANE; Sidi-Mohammed SENOUCI

2009-01-01

301

Optical interconnection networks for high-performance computing systems.  

PubMed

Enabled by silicon photonic technology, optical interconnection networks have the potential to be a key disruptive technology in computing and communication industries. The enduring pursuit of performance gains in computing, combined with stringent power constraints, has fostered the ever-growing computational parallelism associated with chip multiprocessors, memory systems, high-performance computing systems and data centers. Sustaining these parallelism growths introduces unique challenges for on- and off-chip communications, shifting the focus toward novel and fundamentally different communication approaches. Chip-scale photonic interconnection networks, enabled by high-performance silicon photonic devices, offer unprecedented bandwidth scalability with reduced power consumption. We demonstrate that the silicon photonic platforms have already produced all the high-performance photonic devices required to realize these types of networks. Through extensive empirical characterization in much of our work, we demonstrate such feasibility of waveguides, modulators, switches and photodetectors. We also demonstrate systems that simultaneously combine many functionalities to achieve more complex building blocks. We propose novel silicon photonic devices, subsystems, network topologies and architectures to enable unprecedented performance of these photonic interconnection networks. Furthermore, the advantages of photonic interconnection networks extend far beyond the chip, offering advanced communication environments for memory systems, high-performance computing systems, and data centers. PMID:22790508

Biberman, Aleksandr; Bergman, Keren

2012-04-01

302

Home Care Nursing via Computer Networks: Justification and Design Specifications  

PubMed Central

High-tech home care includes the use of information technologies, such as computer networks, to provide direct care to patients in the home. This paper presents the justification and design of a project using a free, public access computer network to deliver home care nursing. The intervention attempts to reduce isolation and improve problem solving among home care patients and their informal caregivers. Three modules comprise the intervention: a decision module, a communications module, and an information data base. This paper describes the experimental evaluation of the project, and discusses issues in the delivery of nursing care via computers.

Brennan, Patricia Flatley

1988-01-01

303

Computational Intelligence in Visual Sensor Networks: Improving Video Processing Systems  

Microsoft Academic Search

In this chapter we will describe several approaches to develop video analysis and segmentation systems based on visual sensor\\u000a networks using computational intelligence. We review the types of problems and algorithms used, and how computational intelligence\\u000a paradigms can help to build competitive solutions. computational intelligence is used here from an “engineering” point of\\u000a view: the designer is provided with tools

Miguel A. Patricio; F. Castanedo; A. Berlanga; O. Pérez; J. García; José Molina

304

Advanced Queue Management Algorithms for Computer Networks  

Microsoft Academic Search

The use of the Internet for time-sensitive services, such as voice and video applications, requires a predictable quality of service. The TCP\\/IP differentiated services architecture was introduced to achieve such performance. Network congestion control, however, still remains a critical and high priority issue and a number of alternative schemes such as random early detection (RED) and its variants were proposed

Jalal Al-Frihat

2005-01-01

305

Network Decomposition and Locality in Distributed Computation  

Microsoft Academic Search

The authors introduce a concept of network decomposition, a partitioning of an arbitrary graph into small-diameter connected components, such that the graph created by contracting each component into a single node has low chromatic number. They present an efficient distributed algorithm for constructing such a decomposition and demonstrate its use for design of efficient distributed algorithms. The method yields new

Baruch Awerbuch; Andrew V. Goldbergt; Michael Luby; Serge A. Plotkin

1989-01-01

306

A Framework for Measuring Student Learning Gains and Engagement in an Introductory Computing Course: A Preliminary Report of Findings  

ERIC Educational Resources Information Center

This paper describes a framework for measuring student learning gains and engagement in a Computer Science 1 (CS 1) / Information Systems 1 (IS 1) course. The framework is designed for a CS1/IS1 course as it has been traditionally taught over the years as well as when it is taught using a new pedagogical approach with Web services. It enables the…

Lim, Billy; Hosack, Bryan; Vogt, Paul

2012-01-01

307

Is It Ethical for Patents to Be Issued for the Computer Algorithms that Affect Course Management Systems for Distance Learning?  

ERIC Educational Resources Information Center

This article discusses the impact of patents for computer algorithms in course management systems. Referring to historical documents and court cases, the positive and negative aspects of software patents are presented. The key argument is the accessibility to algorithms comprising a course management software program such as Blackboard. The…

Moreau, Nancy

2008-01-01

308

The Effect of Prior Experience with Computers, Statistical Self-Efficacy, and Computer Anxiety on Students' Achievement in an Introductory Statistics Course: A Partial Least Squares Path Analysis  

ERIC Educational Resources Information Center

A Partial Least Squares Path Analysis technique was used to test the effect of students' prior experience with computers, statistical self-efficacy, and computer anxiety on their achievement in an introductory statistics course. Computer Anxiety Rating Scale and Current Statistics Self-Efficacy Scale were administered to a sample of 64 first-year…

Abd-El-Fattah, Sabry M.

2005-01-01

309

Computer-Assisted, Programmed Text, and Lecture Modes of Instruction in Three Medical Training Courses: Comparative Evaluation.  

National Technical Information Service (NTIS)

This report contains a comparative analysis of the differential effectiveness of computer-assisted instruction (CAI), programmed instructional text (PIT), and lecture methods of instruction in three medical courses--Medical Laboratory, Radiology, and Dent...

G. M. Deignan

1980-01-01

310

Cloud computing in Aircraft Data Network  

Microsoft Academic Search

The introduction of data networks within an aircraft has created several service opportunities for the air carriers. Using the available Internet connectivity, the carriers could offer services like Video-on-Demand (VoD), Voice-over-IP (VoIP), and gaming-on-demand within the aircraft. One of the major road blocks in implementing any of these services is the additional hardware and software requirements. Each service requires dedicated

Amarnath Jasti; Surya Mohapatra; Bhargav Potluri; Ravi Pendse

2011-01-01

311

Teaching the cloud - experiences in designing and teaching an undergraduate-level course in cloud computing at the Carnegie Mellon University in Qatar  

Microsoft Academic Search

Cloud computing is a disruptive technology, one that embodies a major conceptual shift and is rapidly changing the way users, developers, and organizations work with computing infrastructure. Carnegie Mellon University in Qatar offered a one-semester undergraduate course to introduce students to cloud computing. In this paper we describe our approach and experiences in designing the course. We describe course elements

M. Suhail Rehman; Majd F. Sakr

2011-01-01

312

Six networks on a universal neuromorphic computing substrate.  

PubMed

In this study, we present a highly configurable neuromorphic computing substrate and use it for emulating several types of neural networks. At the heart of this system lies a mixed-signal chip, with analog implementations of neurons and synapses and digital transmission of action potentials. Major advantages of this emulation device, which has been explicitly designed as a universal neural network emulator, are its inherent parallelism and high acceleration factor compared to conventional computers. Its configurability allows the realization of almost arbitrary network topologies and the use of widely varied neuronal and synaptic parameters. Fixed-pattern noise inherent to analog circuitry is reduced by calibration routines. An integrated development environment allows neuroscientists to operate the device without any prior knowledge of neuromorphic circuit design. As a showcase for the capabilities of the system, we describe the successful emulation of six different neural networks which cover a broad spectrum of both structure and functionality. PMID:23423583

Pfeil, Thomas; Grübl, Andreas; Jeltsch, Sebastian; Müller, Eric; Müller, Paul; Petrovici, Mihai A; Schmuker, Michael; Brüderle, Daniel; Schemmel, Johannes; Meier, Karlheinz

2013-01-01

313

Six Networks on a Universal Neuromorphic Computing Substrate  

PubMed Central

In this study, we present a highly configurable neuromorphic computing substrate and use it for emulating several types of neural networks. At the heart of this system lies a mixed-signal chip, with analog implementations of neurons and synapses and digital transmission of action potentials. Major advantages of this emulation device, which has been explicitly designed as a universal neural network emulator, are its inherent parallelism and high acceleration factor compared to conventional computers. Its configurability allows the realization of almost arbitrary network topologies and the use of widely varied neuronal and synaptic parameters. Fixed-pattern noise inherent to analog circuitry is reduced by calibration routines. An integrated development environment allows neuroscientists to operate the device without any prior knowledge of neuromorphic circuit design. As a showcase for the capabilities of the system, we describe the successful emulation of six different neural networks which cover a broad spectrum of both structure and functionality.

Pfeil, Thomas; Grubl, Andreas; Jeltsch, Sebastian; Muller, Eric; Muller, Paul; Petrovici, Mihai A.; Schmuker, Michael; Bruderle, Daniel; Schemmel, Johannes; Meier, Karlheinz

2013-01-01

314

Research toward a heterogeneous networked computing cluster.  

National Technical Information Service (NTIS)

Over the last year the Systems Development Group, SDG, has been involved in a number of projects. The primary projects include extending the UNIX version of DQS, a DCE version of DQS, a Java based queuing system, a Computer Aided Learning and Instruction ...

D. W. Duke T. P. Green

1998-01-01

315

Distributed computation of graphics primitives on a transputer network  

NASA Technical Reports Server (NTRS)

A method is developed for distributing the computation of graphics primitives on a parallel processing network. Off-the-shelf transputer boards are used to perform the graphics transformations and scan-conversion tasks that would normally be assigned to a single transputer based display processor. Each node in the network performs a single graphics primitive computation. Frequently requested tasks can be duplicated on several nodes. The results indicate that the current distribution of commands on the graphics network shows a performance degradation when compared to the graphics display board alone. A change to more computation per node for every communication (perform more complex tasks on each node) may cause the desired increase in throughput.

Ellis, Graham K.

1988-01-01

316

Network performance model for TCP\\/IP based cluster computing  

Microsoft Academic Search

A new communication model, called the PlogPT model, is proposed to predict communication performance in a commodity cluster where computing nodes communicate using TCP\\/IP. This model extends the PlogP model in order to consider the variation of bandwidth brought about by bottleneck links in network switches and the delay of packet retransmission by TCP\\/IP handling. Network switches are modeled as

Akihiro Nomura; Hiroya Matsuba; Yutaka Ishikawa

2007-01-01

317

Energy-Latency Tradeoff for In-Network Function Computation in Random Networks  

Microsoft Academic Search

The problem of designing policies for in-network function computation with\\u000aminimum energy consumption subject to a latency constraint is considered. The\\u000ascaling behavior of the energy consumption under the latency constraint is\\u000aanalyzed for random networks, where the nodes are uniformly placed in growing\\u000aregions and the number of nodes goes to infinity. The special case of sum\\u000afunction computation

Paul N. Balister; Béla Bollobás; Animashree Anandkumar; Alan S. Willsky

2011-01-01

318

Neuronal and network computation in the brain  

NASA Astrophysics Data System (ADS)

The concepts and methods of non-linear dynamics have been a powerful tool for studying some gamow aspects of brain dynamics. In this paper we show how, from time series analysis of electroencepholograms in sick and healthy subjects, chaotic nature of brain activity could be unveiled. This finding gave rise to the concept of spatiotemporal cortical chaotic networks which in turn was the foundation for a simple brain-like device which is able to become attentive, perform pattern recognition and motion detection. A new method of time series analysis is also proposed which demonstrates for the first time the existence of neuronal code in interspike intervals of coclear cells.

Babloyantz, A.

1999-03-01

319

The relationship among self-regulation, internet use, and academic achievement in a computer literacy course  

NASA Astrophysics Data System (ADS)

This research was a correlational study of the relationship among self-regulation, students' nonacademic internet browsing, and academic achievement in an undergraduate computer literacy class. Nonacademic internet browsing during class can be a distraction from student academic studies. There has been little research on the role of self-regulation on nonacademic internet browsing in influencing academic achievement. Undergraduate computer literacy classes were used as samples (n= 39) for measuring these variables. Data were collected during three class periods in two sections of the computer literacy course taught by one instructor. The data consisted of a demographic survey, selected and modified items from the GVU 10th WWW User Survey Questionnaire, selected items of the Motivated Strategies for Learning Questionnaire, and measures of internet use. There were low correlations between self-regulation and academic grades (r= .18, p > .05) and self-regulation and internet use (r= -.14, p > .05). None of the correlations were statistically significant. Also, there was no statistically significant correlation between internet use and academic achievement (r= -.23, p >.05). Self-regulation was highly correlated to self-efficacy (r= .53, p < .05). Total internet access was highly correlated to nonacademic related internet browsing (r= .96, p < .01). Although not statistically significant, the consistent negative correlations between nonacademic internet use with both self-regulation and achievement indicate that the internet may present an attractive distraction to achievement which may be due to lack of self-regulation. The implication of embedded instruction of self-regulation in the computer literacy course was discussed to enhance self-regulated internet use. Further study of interaction of self-regulated internet use and academic achievement is recommended.

YangKim, SungHee

320

Use of Physical Simulation, Computer Simulation, and a Common Product in a Series of Courses to Illu  

NSDL National Science Digital Library

Use of Physical & Computer Simulation and a Standard Product in a Series of Courses to Illustrate Industrial and Manufacturing Engineering Technology Principles This presentation will explain the use of Physical Three-Dimensional Simulation and Computer Simulation coupled with a simple, standard product to teach various principles of Industrial and Manufacturing Engineering Technology throughout several different courses. This product (a simple model wagon), along with a variety of options, is threaded through several courses, allowing students to keep a common frame of reference, while seeing how the various principles within the courses tie together. Every course has a team oriented lab project which allows the students to build their team work and communication skills. This teaching methodology also allows the use of active, hands-on learning for the purpose of process improvement and leadership development. As the courses progress, the students will experience the transformation of the product assembly process from rudimentary assembly, to the effective use of fixtures and workstation design to reduce operator effort and improve productivity. It culminates with the course on Lean Manufacturing which also introduces the use of production simulation using in-house designed and manufactured equipment that allows us to integrate component manufacturing along with product assembly. The presentation will include video clips of the various course projects and principles, a computer simulation and samples of the products. The use of these concepts presented allows students to experience real life examples in the classroom that closely mimic what they will see in industry.

Carlisle, Tom; Winarchick, Charlie

2010-02-22

321

Microcosm to Cosmos: The Growth of a Divisional Computer Network  

PubMed Central

In 1982, we reported the deployment of a network of microcomputers in the Division of Gastroenterology[1]. This network was based upon Corvus Systems Omninet®. Corvus was one of the very first firms to offer networking products for PC's. This PC development occurred coincident with the planning phase of the Johns Hopkins Hospital's multisegment ethernet project. A rich communications infra-structure is now in place at the Johns Hopkins Medical Institutions[2,3]. Shortly after the hospital development under the direction of the Operational and Clinical Systems Division (OCS) development began, the Johns Hopkins School of Medicine began an Integrated Academic Information Management Systems (IAIMS) planning effort. We now present a model that uses aspects of all three planning efforts (PC networks, Hospital Information Systems & IAIMS) to build a divisional computing facility. This facility is viewed as a terminal leaf on then institutional network diagram. Nevertheless, it is noteworthy that this leaf, the divisional resource in the Division of Gastroenterology (GASNET), has a rich substructure and functionality of its own, perhaps revealing the recursive nature of network architecture. The current status, design and function of the GASNET computational facility is discussed. Among the major positive aspects of this design are the sharing and centralization of MS-DOS software, the high-speed DOS/Unix link that makes available most of the our institution's computing resources.

Johannes, R.S.; Kahane, Stephen N.

1987-01-01

322

Computational analysis of light scattering from collagen fiber networks  

NASA Astrophysics Data System (ADS)

Neoplastic progression in epithelial tissues is accompanied by structural and morphological changes in the stromal collagen matrix. We used the Finite-Difference Time-Domain (FDTD) method, a popular computational technique for full-vector solution of complex problems in electromagnetics, to establish a relationship between structural properties of collagen fiber networks and light scattering, and to analyze how neoplastic changes alter stromal scattering properties. To create realistic collagen network models, we acquired optical sections from the stroma of fresh normal and neoplastic oral cavity biopsies using fluorescence confocal microscopy. These optical sections were then processed to construct three-dimensional collagen networks of different sizes as FDTD model input. Image analysis revealed that volume fraction of collagen fibers in the stroma decreases with neoplastic progression, and statistical texture features computed suggest that fibers tend to be more disconnected in neoplastic stroma. The FDTD modeling results showed that neoplastic fiber networks have smaller scattering cross-sections compared to normal networks of the same size, whereas high-angle scattering probabilities tend to be higher for neoplastic networks. Characterization of stromal scattering is expected to provide a basis to better interpret spectroscopic optical signals and to develop more reliable computational models to describe photon propagation in epithelial tissues.

Arifler, Dizem; Pavlova, Ina; Gillenwater, Ann; Richards-Kortum, Rebecca

2007-07-01

323

Implementation of neural network-based nonlinear adaptive model predictive control over a service-oriented computer network  

Microsoft Academic Search

This paper presents a new neural network-based nonlinear adaptive model predictive control algorithm and its implementation over a service-oriented computer network. The computer network is based on the device profile for web services. At each sampling instant, the algorithm identifies a nonlinear process model using a recurrent neural network. On the basis of the identified model, the nonlinear adaptive model

Vincent A. Akpan; Ioakeim K. Samaras; George D. Hassapis

2010-01-01

324

Cardiac mitochondrial network excitability: insights from computational analysis  

PubMed Central

In the heart, mitochondria form a regular lattice and function as a coordinated, nonlinear network to continuously produce ATP to meet the high-energy demand of the cardiomyocytes. Cardiac mitochondria also exhibit properties of an excitable system: electrical or chemical signals can spread within or among cells in the syncytium. The detailed mechanisms by which signals pass among individual elements (mitochondria) across the network are still not completely understood, although emerging studies suggest that network excitability might be mediated by the local diffusion and autocatalytic release of messenger molecules such as reactive oxygen species and/or Ca2+. In this short review, we have attempted to described recent advances in the field of cardiac mitochondrial network excitability. Specifically, we have focused on how mitochondria communicate with each other through the diffusion and regeneration of messenger molecules to initiate and propagate waves or oscillations, as revealed by computational models of mitochondrial network.

O'Rourke, Brian

2012-01-01

325

Quantum computer networks with the orbital angular momentum of light  

NASA Astrophysics Data System (ADS)

Inside computer networks, different information processing tasks are necessary to deliver the user data efficiently. This processing can also be done in the quantum domain. We present simple optical quantum networks where the orbital angular momentum (OAM) of a single photon is used as an ancillary degree of freedom which controls decisions at the network level. Linear optical elements are enough to provide important network primitives such as multiplexing and routing. First we show how to build a simple multiplexer and demultiplexer which combine photonic qubits and separate them again at the receiver. We also give two different self-routing networks where the OAM of an input photon is enough to make it find its desired destination.

Garcia-Escartin, Juan Carlos; Chamorro-Posada, Pedro

2012-09-01

326

A local area computer network expert system framework  

NASA Technical Reports Server (NTRS)

Over the past years an expert system called LANES designed to detect and isolate faults in the Goddard-wide Hybrid Local Area Computer Network (LACN) was developed. As a result, the need for developing a more generic LACN fault isolation expert system has become apparent. An object oriented approach was explored to create a set of generic classes, objects, rules, and methods that would be necessary to meet this need. The object classes provide a convenient mechanism for separating high level information from low level network specific information. This approach yeilds a framework which can be applied to different network configurations and be easily expanded to meet new needs.

Dominy, Robert

1987-01-01

327

Three-dimensional courses of zygomaticofacial and zygomaticotemporal canals using micro-computed tomography in Korean.  

PubMed

The zygomatic nerve (ZN), which originates from the maxillary nerve at the pterygopalatine fossa, enters the orbit through the inferior orbital fissure. Within the lateral region of the orbit, the ZN divides into the zygomaticofacial (ZF) and zygomaticotemporal (ZT) nerves. The ZF and ZT nerves then pass on to the face and temporal region through the zygomaticoorbital foramen and enter their own bony canals within the zygomatic bone. However, multiple zygomaticofacial and zygomaticotemporal canals (ZFCs and ZTCs, respectively) can be observed, and their detailed intrabony courses are unknown. The aim of this study was clarify the three-dimensional intrabony courses and running patterns of the ZFCs and ZTCs, both to obtain a detailed anatomical description and for clinical purposes. Fourteen sides of the zygomatic bones were scanned as two-dimensional images using a micro-computed tomography (CT), with 32-?m slice thickness. Intrabony structures of each canals were three-dimensionally reconstructed and analyzed using Mimics computer software (Version 10.01; Materialise, Leuven, Belgium). We found that some ZTC was originated from ZFC. In 71.4% of the specimens, the ZTC(s) divided from the intrabony canal along the course of the ZFC(s). In other cases, 28.6% of ZTCs were opened through each corresponding ZT foramen. Zygomaticofacial canal originates from zygomaticoorbital foramen, divided into some of ZTCs, and is finally opened as ZF foramen. This new anatomical description of the intrabony structures of the ZFC(s) and ZTC(s) within the zygomatic bone by micro-CT technology provided helpful information to surgeons performing clinical procedures such as Le Fort osteotomy and reconstructive surgeries in the midface region. PMID:24036727

Kim, Hong-San; Oh, Jin-Ho; Choi, Da-Yae; Lee, Jae-Gi; Choi, Jong-Hoon; Hu, Kyung-Seok; Kim, Hee-Jin; Yang, Hun-Mu

2013-09-01

328

Computer aided nonlinear electrical networks analysis  

NASA Technical Reports Server (NTRS)

Techniques used in simulating an electrical circuit with nonlinear elements for use in computer-aided circuit analysis programs are described. Elements of the circuit include capacitors, resistors, inductors, transistors, diodes, and voltage and current sources (constant or time varying). Simulation features are discussed for dc, ac, and/or transient circuit analysis. Calculations are based on the model approach of formulating the circuit equations. A particular solution of transient analysis for nonlinear storage elements is described.

Slapnicar, P.

1977-01-01

329

Accurate and Precise Computation Using Analog VLSI, with Applications to Computer Graphics and Neural Networks  

Microsoft Academic Search

This thesis develops an engineering practice and design methodology to enable us to use CMOS analog VLSI chips to perform more accurate and precise computation. These techniques form the basis of an approach that permits us to build computer graphics and neural network applications using analog VLSI. The nature of the design methodology focuses on defining goals for circuit behavior

David Blair Kirk

1993-01-01

330

Overview of the human brain as a distributed computing network  

SciTech Connect

The hierarchically organized human brain is viewed as a prime example of a massively parallel, adaptive information processing and process control system. A brief overview of the human brain is provided for computer architects, in hopes that the principles of massive parallelism, dense connectivity and self-organization of assemblies of processing elements will prove relevant to the design of fifth generation VLSI computing networks. 6 references.

Gevins, A.S.

1983-01-01

331

Performance Evaluation in Network-Based Parallel Computing  

NASA Technical Reports Server (NTRS)

Network-based parallel computing is emerging as a cost-effective alternative for solving many problems which require use of supercomputers or massively parallel computers. The primary objective of this project has been to conduct experimental research on performance evaluation for clustered parallel computing. First, a testbed was established by augmenting our existing SUNSPARCs' network with PVM (Parallel Virtual Machine) which is a software system for linking clusters of machines. Second, a set of three basic applications were selected. The applications consist of a parallel search, a parallel sort, a parallel matrix multiplication. These application programs were implemented in C programming language under PVM. Third, we conducted performance evaluation under various configurations and problem sizes. Alternative parallel computing models and workload allocations for application programs were explored. The performance metric was limited to elapsed time or response time which in the context of parallel computing can be expressed in terms of speedup. The results reveal that the overhead of communication latency between processes in many cases is the restricting factor to performance. That is, coarse-grain parallelism which requires less frequent communication between processes will result in higher performance in network-based computing. Finally, we are in the final stages of installing an Asynchronous Transfer Mode (ATM) switch and four ATM interfaces (each 155 Mbps) which will allow us to extend our study to newer applications, performance metrics, and configurations.

Dezhgosha, Kamyar

1996-01-01

332

Logical Networks: Towards Foundations for Programmable Overlay Networks and Overlay Computing Systems  

Microsoft Academic Search

We propose and discuss foundations for programmable over- lay networks and overlay computing systems. Such overlays are built over a large number of distributed computational individuals, virtually organized in colonies, and ruled by a leader (broker) who is elected or imposed by system administrators. Every individual asks the broker to log in the colony by declaring the resources that can

Luigi Liquori; Michel Cosnard

2007-01-01

333

A computational study of routing algorithms for realistic transportation networks  

SciTech Connect

The authors carry out an experimental analysis of a number of shortest path (routing) algorithms investigated in the context of the TRANSIMS (Transportation Analysis and Simulation System) project. The main focus of the paper is to study how various heuristic and exact solutions, associated data structures affected the computational performance of the software developed especially for realistic transportation networks. For this purpose the authors have used Dallas Fort-Worth road network with very high degree of resolution. The following general results are obtained: (1) they discuss and experimentally analyze various one-one shortest path algorithms, which include classical exact algorithms studied in the literature as well as heuristic solutions that are designed to take into account the geometric structure of the input instances; (2) they describe a number of extensions to the basic shortest path algorithm. These extensions were primarily motivated by practical problems arising in TRANSIMS and ITS (Intelligent Transportation Systems) related technologies. Extensions discussed include--(i) time dependent networks, (ii) multi-modal networks, (iii) networks with public transportation and associated schedules. Computational results are provided to empirically compare the efficiency of various algorithms. The studies indicate that a modified Dijkstra`s algorithm is computationally fast and an excellent candidate for use in various transportation planning applications as well as ITS related technologies.

Jacob, R.; Marathe, M.V.; Nagel, K.

1998-12-01

334

US computer research networks: Current and future  

NASA Technical Reports Server (NTRS)

During the last decade, NASA LeRC's Communication Program has conducted a series of telecommunications forecasting studies to project trends and requirements and to identify critical telecommunications technologies that must be developed to meet future requirements. The Government Networks Division of Contel Federal Systems has assisted NASA in these studies, and the current study builds upon these earlier efforts. The current major thrust of the NASA Communications Program is aimed at developing the high risk, advanced, communications satellite and terminal technologies required to significantly increase the capacity of future communications systems. Also, major new technological, economic, and social-political events and trends are now shaping the communications industry of the future. Therefore, a re-examination of future telecommunications needs and requirements is necessary to enable NASA to make management decisions in its Communications Program and to ensure the proper technologies and systems are addressed. This study, through a series of Task Orders, is helping NASA define the likely communication service needs and requirements of the future and thereby ensuring that the most appropriate technology developments are pursued.

Kratochvil, D.; Sood, D.; Verostko, A.

1989-01-01

335

Identifying failure in a tree network of a parallel computer  

DOEpatents

Methods, parallel computers, and products are provided for identifying failure in a tree network of a parallel computer. The parallel computer includes one or more processing sets including an I/O node and a plurality of compute nodes. For each processing set embodiments include selecting a set of test compute nodes, the test compute nodes being a subset of the compute nodes of the processing set; measuring the performance of the I/O node of the processing set; measuring the performance of the selected set of test compute nodes; calculating a current test value in dependence upon the measured performance of the I/O node of the processing set, the measured performance of the set of test compute nodes, and a predetermined value for I/O node performance; and comparing the current test value with a predetermined tree performance threshold. If the current test value is below the predetermined tree performance threshold, embodiments include selecting another set of test compute nodes. If the current test value is not below the predetermined tree performance threshold, embodiments include selecting from the test compute nodes one or more potential problem nodes and testing individually potential problem nodes and links to potential problem nodes.

Archer, Charles J. (Rochester, MN); Pinnow, Kurt W. (Rochester, MN); Wallenfelt, Brian P. (Eden Prairie, MN)

2010-08-24

336

Challenges for High-Performance Networking for Exascale Computing  

Microsoft Academic Search

Achieving the next three orders of magnitude performance increase to move from petascale to exascale computing will require a significant advancements in several fundamental areas. Recent studies have outlined many of the challenges in hardware and software that will be needed. In this paper, we examine these challenges with respect to high-performance networking. We describe the repercussions of anticipated changes

Ron Brightwell; Brian W. Barrett; K. Scott Hemmert; Keith D. Underwood

2010-01-01

337

Research of Security Vulnerability in the Computer Network  

Microsoft Academic Search

In order to solve the problem of security vulnerability in the computer network radically, it was studied for the cause of vulnerability. Solving scheme was put forward aim at one kind of vulnerability, that is, by the special scan and encryption techniques, it makes attacker can't bypass its access control. In this way, it can avoid the vulnerability caused by

Cuijiao Fu

2010-01-01

338

A Network Flow Computation for Project Cost Curves  

Microsoft Academic Search

A network flow method is outlined for solving the linear programming problem of computing the least cost curve for a project composed of many individual jobs, where it is assumed that certain jobs must be finished before others can be started. Each job has an associated crash completion time and normal completion time, and the cost of doing the job

D. R. Fulkerson

1961-01-01

339

Virtual networks and QoS for cluster computing  

Microsoft Academic Search

Exploiting clusters of workstations as a single computational resource is an attractive alternative to conventional multiprocessor technologies. However, the class of parallel applications that can benefit from clusters is restricted due to their relatively high latency and low throughput-consequences of conventional networking. LANs offer the best performance but also limit the scope for effective clustering to a single room or

C. Allision

1998-01-01

340

Computer-mediated interactions through English for Elite Police Network  

Microsoft Academic Search

The objective of English for Elite Police Network program is to provide an interactive platform for trainees, instructors, police experts and other participants so as to enhance interests as well as efficiency in professional English learning and training. Computer-mediated interactions are strengthened in both police English learning and policing skills training through role-playing, discussing and interacting in scenarios which enable

Zhongwen Liu

2011-01-01

341

ThreadMarks: Shared Memory Computing on Networks of Workstations  

Microsoft Academic Search

TreadMarks supports parallel computing on networks of workstations by providing the applicationwith a shared memory abstraction. Shared memory facilitates the transition from sequential toparallel programs. After identifying possible sources of parallelism in the code, most of the datastructures can be retained without change, and only synchronization needs to be added to achieve acorrect shared memory parallel program. Additional transformations may

Cristiana Amza; Alan L. Cox; Sandhya Dwarkadas; Peter J. Keleher; Honghui Lu; Ramakrishnan Rajamony; Weimin Yu; Willy Zwaenepoel

1996-01-01

342

Computer-aided stepwise service creation environment for intelligent network  

Microsoft Academic Search

A computer-aided service creation environment (CSCE) which supports easier graphical and stepwise specification descriptions corresponding to various skill levels of service designers and generates service logic programs (SLPs) for the intelligent network is presented. CSCE is mainly composed of a stepwise service specification description conversion system, intelligent editors (IEDs), and an automatic specification verification system. The service specification is described

Yoshihiro NIITSU; Osamu MIZUNO; Mitsuhiro OKAMOTO

1992-01-01

343

Controlling Networked Devices in Ubiquitous Computing Environments using Biofeedback  

Microsoft Academic Search

With the advent of service oriented computing, device miniaturisation and wireless communications, it is evident that common household appliances are becoming more ubiquitous and pervasive. We are experiencing a transition from dedicated electrical appliances to devices designed to publish the functions they have as independent network-enabled services. Devices and the services they offer will be seamlessly integrated within the environment

P. Fergus; M. Merabti; M. B. Hanneghan; A. Taleb-Bendiab

2004-01-01

344

A neural network regression model for relative dose computation  

Microsoft Academic Search

This paper describes a neural network (NN) regression model for relative dose computation. The input signal of the NN model includes depths and field sizes and the output is the relative dose, for example, percentage depth dose (%DD) or tissue-air ratio (TAR) in this paper. After a functional link has been created, the expressing ability of input patterns and the

Xingen Wu; Yunping Zhu

2000-01-01

345

The analogies of highway and computer network traffic  

Microsoft Academic Search

In this study we compare the characteristics of highway and computer network traffic in a simple topology. The goal is to extract some common features and to find out to which degree these systems can be regarded as analogous so that powerful tools developed for the description of highway traffic, such as cellular automata models could be applied for the

Simon Gábor; István Csabai

2002-01-01

346

On the basic computational structure of gene regulatory networks  

Microsoft Academic Search

Gene regulatory networks constitute the first layer of the cellular computation for cell adaptation and surveillance. In these webs, a set of causal relations is built up from thousands of interactions between transcription factors and their target genes. The large size of these webs and their entangled nature make difficult to achieve a global view of their internal organisation. Here,

Carlos Rodriguez-Caso; Bernat Corominas-Murtra; Ricard V. Solé

2009-01-01

347

Efficient Immunization Strategies for Computer Networks and Populations  

Microsoft Academic Search

We present an effective immunization strategy for computer networks and populations with broad and, in particular, scale-free degree distributions. The proposed strategy, acquaintance immunization, calls for the immunization of random acquaintances of random nodes (individuals). The strategy requires no knowledge of the node degrees or any other global knowledge, as do targeted immunization strategies. We study analytically the critical threshold

Reuven Cohen; Shlomo Havlin; Daniel Ben-Avraham

2003-01-01

348

Business Computer Network--A "Gateway" to Multiple Databanks.  

ERIC Educational Resources Information Center

Business Computer Network (BCN) employs automatic calling and logon, multiple database access, disk search capture, and search assistance interfaces to provide single access to 15 online services. Telecommunications software (SuperScout) used to reach BCN and participating online services offers storage and message options and is accompanied by…

O'Leary, Mick

1985-01-01

349

Network-Centric Computing: A New Paradigm for the Military.  

National Technical Information Service (NTIS)

This paper discusses technology known as ultra-thin clients (UTCs) and how to make information delivery more reliable and less expensive through the use of 'display appliances' using a network-centric computing (NCC) architecture. The NCC approach is targ...

L. J. Brachfeld

2001-01-01

350

Computer program for network synthesis by frequency response fit  

NASA Technical Reports Server (NTRS)

Computer program synthesizes a passive network by minimizing the difference in desired and actual frequency response. The program solves for the critical points of the error function /weighted least squares fit between calculated and desired frequency response/ by the multivariable Newton-Raphson method with components constrained to an admissible region.

Green, S.

1967-01-01

351

Computational Templates, Neural Network Dynamics, and Symbolic Logic  

Microsoft Academic Search

This paper looks at the relationship between subsymbolic neural networks and symbolic logical systems from a philosophy of science perspective. More specifically, the point of view is that of Paul Humphreys' philosophical account of the organization of scientific knowledge (Humphreys, Paul. Extending Ourselves - Computational Science, Empiricism and the Scientific Method. Oxford: Oxford University Press, 2004.) Humphreys considers the units

Otto Lappi

2007-01-01

352

TCP computational energy cost within wireless Mobile Ad Hoc Network  

Microsoft Academic Search

In this paper, we present the results of a detailed measurement study of the computational energy cost of different TCP variants when used in mobile ad hoc networks. The studied TCP variants are TCP New-Reno, Vegas, SACK, and Westwood. We used a hybrid approach using simulation and emulation, through SEDLANE emulation tool. This study investigates different packet loss models (congestion,

Alaa Seddik-ghaleb; Yacine Ghamri-doudane; Sidi-mohammed Senouci

2008-01-01

353

Biological network analyses: computational genomics and systems approaches  

Microsoft Academic Search

The complex responses of cells to stimuli are the aggregate of alterations at the genetic, protein, metabolic and cellular levels. The immense quantities of data now available from high-throughput genomic, proteomic and metabolomic sources require specialized analytical approaches. The integration of such data for the computational elucidation and analysis of cellular pathways and networks is an area of considerable current

S. P. Walton; Z. Li; C. Chan

2006-01-01

354

Computational Neuropsychiatry - Schizophrenia as a Cognitive Brain Network Disorder  

PubMed Central

Computational modeling of functional brain networks in fMRI data has advanced the understanding of higher cognitive function. It is hypothesized that functional networks mediating higher cognitive processes are disrupted in people with schizophrenia. In this article, we review studies that applied measures of functional and effective connectivity to fMRI data during cognitive tasks, in particular working memory fMRI studies. We provide a conceptual summary of the main findings in fMRI data and their relationship with neurotransmitter systems, which are known to be altered in individuals with schizophrenia. We consider possible developments in computational neuropsychiatry, which are likely to further our understanding of how key functional networks are altered in schizophrenia.

Dauvermann, Maria R.; Whalley, Heather C.; Schmidt, Andre; Lee, Graham L.; Romaniuk, Liana; Roberts, Neil; Johnstone, Eve C.; Lawrie, Stephen M.; Moorhead, Thomas W. J.

2014-01-01

355

The computational core and fixed point organization in Boolean networks  

NASA Astrophysics Data System (ADS)

In this paper, we analyse large random Boolean networks in terms of a constraint satisfaction problem. We first develop an algorithmic scheme which allows us to prune simple logical cascades and underdetermined variables, returning thereby the computational core of the network. Second, we apply the cavity method to analyse the number and organization of fixed points. We find in particular a phase transition between an easy and a complex regulatory phase, the latter being characterized by the existence of an exponential number of macroscopically separated fixed point clusters. The different techniques developed are reinterpreted as algorithms for the analysis of single Boolean networks, and they are applied in the analysis of and in silico experiments on the gene regulatory networks of baker's yeast (Saccharomyces cerevisiae) and the segment-polarity genes of the fruitfly Drosophila melanogaster.

Correale, L.; Leone, M.; Pagnani, A.; Weigt, M.; Zecchina, R.

2006-03-01

356

Computational modeling of signal transduction networks: a pedagogical exposition.  

PubMed

We give a pedagogical introduction to computational modeling of signal transduction networks, starting from explaining the representations of chemical reactions by differential equations via the law of mass action. We discuss elementary biochemical reactions such as Michaelis-Menten enzyme kinetics and cooperative binding, and show how these allow the representation of large networks as systems of differential equations. We discuss the importance of looking for simpler or reduced models, such as network motifs or dynamical motifs within the larger network, and describe methods to obtain qualitative behavior by bifurcation analysis, using freely available continuation software. We then discuss stochastic kinetics and show how to implement easy-to-use methods of rule-based modeling for stochastic simulations. We finally suggest some methods for comprehensive parameter sensitivity analysis, and discuss the insights that it could yield. Examples, including code to try out, are provided based on a paper that modeled Ras kinetics in thymocytes. PMID:23361987

Prasad, Ashok

2012-01-01

357

Hazard Communication Project: computer-based training course (for microcomputers). Software  

SciTech Connect

The software is computer-based training with the following course objectives: to inform employees of their employer's requirements under the OSHA Hazard Communication Standard (29 CFR 1910.1200); to instruct employees on the procedures for obtaining and using information on hazardous materials, including understanding labeling systems and understanding the material safety data sheet (MSDS) information; to provide information on 11 classes of chemicals, including their common uses, potential physical and health hazards, detection methods, and safety measures to follow. There are 14 lessons, ranging in length from 30 minutes to 1 (one) hour. Software Description: The software is written in the UNISON language for use on an IBM PC or compatible machines using MS DOS operating system. It requires 378K of memory. Special requirements are an EGA graphics card and monitor. The program will not run on monochrome or CGA systems.

Fisher, S.

1989-03-01

358

Reduction of dynamical biochemical reactions networks in computational biology.  

PubMed

Biochemical networks are used in computational biology, to model mechanistic details of systems involved in cell signaling, metabolism, and regulation of gene expression. Parametric and structural uncertainty, as well as combinatorial explosion are strong obstacles against analyzing the dynamics of large models of this type. Multiscaleness, an important property of these networks, can be used to get past some of these obstacles. Networks with many well separated time scales, can be reduced to simpler models, in a way that depends only on the orders of magnitude and not on the exact values of the kinetic parameters. The main idea used for such robust simplifications of networks is the concept of dominance among model elements, allowing hierarchical organization of these elements according to their effects on the network dynamics. This concept finds a natural formulation in tropical geometry. We revisit, in the light of these new ideas, the main approaches to model reduction of reaction networks, such as quasi-steady state (QSS) and quasi-equilibrium approximations (QE), and provide practical recipes for model reduction of linear and non-linear networks. We also discuss the application of model reduction to the problem of parameter identification, via backward pruning machine learning techniques. PMID:22833754

Radulescu, O; Gorban, A N; Zinovyev, A; Noel, V

2012-01-01

359

Reduction of dynamical biochemical reactions networks in computational biology  

PubMed Central

Biochemical networks are used in computational biology, to model mechanistic details of systems involved in cell signaling, metabolism, and regulation of gene expression. Parametric and structural uncertainty, as well as combinatorial explosion are strong obstacles against analyzing the dynamics of large models of this type. Multiscaleness, an important property of these networks, can be used to get past some of these obstacles. Networks with many well separated time scales, can be reduced to simpler models, in a way that depends only on the orders of magnitude and not on the exact values of the kinetic parameters. The main idea used for such robust simplifications of networks is the concept of dominance among model elements, allowing hierarchical organization of these elements according to their effects on the network dynamics. This concept finds a natural formulation in tropical geometry. We revisit, in the light of these new ideas, the main approaches to model reduction of reaction networks, such as quasi-steady state (QSS) and quasi-equilibrium approximations (QE), and provide practical recipes for model reduction of linear and non-linear networks. We also discuss the application of model reduction to the problem of parameter identification, via backward pruning machine learning techniques.

Radulescu, O.; Gorban, A. N.; Zinovyev, A.; Noel, V.

2012-01-01

360

A data mining course for computer science: primary sources and implementations  

Microsoft Academic Search

An undergraduate elective course in data mining provides a strong opportunity for students to learn research skills, practice data structures, and enhance their understanding of algorithms. I have developed a data mining course built around the idea of using research-level papers as the primary reading material for the course, and implementing data mining algorithms for the assignments. Such a course

David R. Musicant

2006-01-01

361

An Ethnographic, Controlled Study of the Use of a Computer-based Histology Atlas during a Laboratory Course  

Microsoft Academic Search

ObjectiveTo evaluate the use and effect of a computer-based histology atlas during required laboratory sessions in a medical school histology course.DesignEthnographic observation of students' interactions in a factorial, controlled setting.MeasurementsEthnographer's observations; student and instructor self-report survey after each laboratory session with items rated from 1 (least) to 7 (best); microscope practicum scores at the end of the course.ResultsBetween groups assigned

Harold P Lehmann; Joan A Freedman; John Massad; Renee Z Dintzis

1999-01-01

362

Analysis of Intrusion Detection and Attack Proliferation in Computer Networks  

NASA Astrophysics Data System (ADS)

One of the popular models to describe computer worm propagation is the Susceptible-Infected (SI) model [1]. This model of worm propagation has been implemented on the simulation toolkit Network Simulator v2 (ns-2) [2]. The ns-2 toolkit has the capability to simulate networks of different topologies. The topology studied in this work, however, is that of a simple star-topology. This work introduces our initial efforts to learn the relevant quantities describing an infection given synthetic data obtained from running the ns-2 worm model. We aim to use Bayesian methods to gain a predictive understanding of how computer infections spread in real world network topologies. This understanding would greatly reinforce dissemination of targeted immunization strategies, which may prevent real-world epidemics. The data consist of reports of infection from a subset of nodes in a large network during an attack. The infection equation obtained from [1] enables us to derive a likelihood function for the infection reports. This prior information can be used in the Bayesian framework to obtain the posterior probabilities for network properties of interest, such as the rate at which nodes contact one another (also referred to as contact rate or scan rate). Our preliminary analyses indicate an effective spread rate of only 1/5th the actual scan rate used for a star-type of topology. This implies that as the population becomes saturated with infected nodes the actual spread rate will become much less than the scan rate used in the simulation.

Rangan, Prahalad; Knuth, Kevin H.

2007-11-01

363

Selected Problems of Determining the Course of Railway Routes by Use of GPS Network Solution  

NASA Astrophysics Data System (ADS)

The main problem related to railroad surveying design and its maintenance is the necessity to operate in local geodetic reference systems caused by the long rail sections with straight lines and curvatures of the running edge. Due to that reason the geodetic railroad classical surveying methods requires to divide all track for a short measurement section and that caused additional errors. Development of the Global Navigational Satellite Systems (GNSS) positioning methods operating in the standardized World Geodetic System (WGS-84) allowed verification of capability of utilization GPS measurements for railroad surveying. It can be stated that implemented satellite measurement techniques opens a whole new perspective on applied research and enables very precise determination of data for railway line determining, modernization and design. The research works focused on implementation GNSS multi-receivers measurement positioning platform for projecting and stock-taking working based on polish active geodesic network ASG-EUPOS, as a reference frame. In order to eliminate the influence of random measurement errors and to obtain the coordinates representing the actual shape of the track few campaigns were realized in 2009 and 2010. Leica GPS Total station system 1200 SmartRover (with ATX1230 GG antennas) receivers were located in the diameter of the measurement platform. Polish Active Geodetic Network ASG-EUPOS was used as a reference network transmitted Real Time Kinematic Positioning Service according to RTCM 3.1 standard. Optimum time period were selected for GNSS campaign and testing area was chosen without large obstructions. The article presents some surveying results of the measurement campaigns and also discusses the accuracy of the course determination. Analyzes and implementation of results in railroad design process are also discussed.

Koc, W?adys?aw; Specht, Cezary

2011-09-01

364

Evaluation of the Markov Models in Computer Networks Simulation  

NASA Astrophysics Data System (ADS)

This paper is about the application of Discrete Markov models [1], [2] for the simulation of computer networks where the number of clients remains unchanged. Two numerical methods [3] have been used, the Power simulation method and the P-simulation method. Two network models have been used: the Gordan-Newell and the Cox-Cox models. In simulating those two models, the asymptotic performance of the simulation has been compared, in term of the convergence criteria toward the stationary state of the model.

Sinno, Nisrine; Youssef, Hussein; Ghaddar, Ahmad

2010-06-01

365

Prediction of Student Course Selection in Online Higher Education Institutes Using Neural Network  

ERIC Educational Resources Information Center

Students are required to choose courses they are interested in for the coming semester. Due to restrictions, including lack of sufficient resources and overheads of running several courses, some universities might not offer all of a student's desirable courses. Universities must know every student's demands for every course prior to each semester…

Kardan, Ahmad A.; Sadeghi, Hamid; Ghidary, Saeed Shiry; Sani, Mohammad Reza Fani

2013-01-01

366

Blogging within a Social Networking Site as a Form of Literature Response in a Teacher Education Course  

ERIC Educational Resources Information Center

The purpose of this qualitative study was to document how pre-service teachers in a children's literature course experienced blogging on a social networking site as a form of literature response. Understanding how pre-service teachers experience these tools can inform the ways we instruct them to integrate Web 2.0 tools into their teaching.…

Hutchison, Amy; Wang, Wei

2012-01-01

367

PVM system: Supercomputer level concurrent computation on a network of IBM RS/6000 power stations.  

National Technical Information Service (NTIS)

The PVM (Parallel Virtual Machine) system enables supercomputer level concurrent computations to be performed on interconnected networks of heterogeneous computer systems. Specifically, a network of 13 IBM RS/6000 powerstations has been successfully used ...

V. S. Sunderam G. A. Geist

1991-01-01

368

A Distributed Algorithm for Constructing Minimal Spanning Trees in Computer-Communication Networks.  

National Technical Information Service (NTIS)

This paper presents a distributed algorithm for constructing minimal spanning trees in computer-communication networks. The algorithm can be executed concurrently and asynchronously by the different computers of the network. This algorithm is also suitabl...

Y. K. Dalal

1976-01-01

369

Cellular computational networks--a scalable architecture for learning the dynamics of large networked systems.  

PubMed

Neural networks for implementing large networked systems such as smart electric power grids consist of multiple inputs and outputs. Many outputs lead to a greater number of parameters to be adapted. Each additional variable increases the dimensionality of the problem and hence learning becomes a challenge. Cellular computational networks (CCNs) are a class of sparsely connected dynamic recurrent networks (DRNs). By proper selection of a set of input elements for each output variable in a given application, a DRN can be modified into a CCN which significantly reduces the complexity of the neural network and allows use of simple training methods for independent learning in each cell thus making it scalable. This article demonstrates this concept of developing a CCN using dimensionality reduction in a DRN for scalability and better performance. The concept has been analytically explained and empirically verified through application. PMID:24300549

Luitel, Bipul; Venayagamoorthy, Ganesh Kumar

2014-02-01

370

Brain Network Evolution after Stroke Based on Computational Experiments  

PubMed Central

Stroke is a frequently-occurring disease threatening the human nervous system. As a serious debilitation affecting a large-scale, hierarchical, and vastly complex electrochemical system, stroke remains relatively misunderstood. Rehabilitation mechanisms and means have suffered from this lack of systematic understanding. Here we propose an evolution model to simulate the dynamic actual evolvement process of functional brain networks computationally in an effort to address current shortcomings in the state of the field. According to simulation results, we conclude that the brain networks of patients following acute stroke were characterized by lower small worldness and lower quantity of long-distance connections compared with the healthy condition. Moreover, distance penalization may be used to describe the general mechanism of brain network evolution in the acute period after stroke.

Li, Wei; Huang, Yue; Li, Yapeng; Chen, Xi

2013-01-01

371

Brain network evolution after stroke based on computational experiments.  

PubMed

Stroke is a frequently-occurring disease threatening the human nervous system. As a serious debilitation affecting a large-scale, hierarchical, and vastly complex electrochemical system, stroke remains relatively misunderstood. Rehabilitation mechanisms and means have suffered from this lack of systematic understanding. Here we propose an evolution model to simulate the dynamic actual evolvement process of functional brain networks computationally in an effort to address current shortcomings in the state of the field. According to simulation results, we conclude that the brain networks of patients following acute stroke were characterized by lower small worldness and lower quantity of long-distance connections compared with the healthy condition. Moreover, distance penalization may be used to describe the general mechanism of brain network evolution in the acute period after stroke. PMID:24376592

Li, Wei; Huang, Yue; Li, Yapeng; Chen, Xi

2013-01-01

372

Review of efforts combining neural networks and evolutionary computation  

NASA Astrophysics Data System (ADS)

Since the widespread recognition of the capacity for neural networks to perform general function approximation, a variety of such mapping functions have been used to address difficult problems in pattern recognition, time series forecasting, automatic control, image compression, and other engineering applications. Although these efforts have met with considerable success, the design and training of neural networks have remained much of an art, relying on human expertise, trial, and error. More recently, methods in evolutionary computation, including genetic algorithms, evolution strategies, and evolutionary programming, have been used to assist in and automate the design and training of neural networks. This presentation offers a review of these efforts and discusses the potential benefits and limitations of such combinations.

Fogel, David B.; Angeline, Peter J.

1995-04-01

373

Computation-Communication Overlap on Network-of-Workstation Multiprocessors  

Microsoft Academic Search

This paper describes and evaluates a compiler trans- formation that improves the performance of parallel programs on Network-of-Workstation (NOW) shared- memory multiprocessors. The transformation overlaps the communication time resulting form non-local mem- ory accesses with the computation time in parallel loops to effectively hide the latency of the remote accesses. The transformation peels from a parallel loop iterations that access

Gary Liu; Tarek S. Abdelrahman

1998-01-01

374

A unified prediction of computer virus spread in connected networks  

NASA Astrophysics Data System (ADS)

We derive two models of viral epidemiology on connected networks and compare results to simulations. The differential equation model easily predicts the expected long term behavior by defining a boundary between survival and extinction regions. The discrete Markov model captures the short term behavior dependent on initial conditions, providing extinction probabilities and the fluctuations around the expected behavior. These analysis techniques provide new insight on the persistence of computer viruses and what strategies should be devised for their control.

Billings, Lora; Spears, William M.; Schwartz, Ira B.

2002-05-01

375

A data mining course for computer science: primary sources and implementations  

Microsoft Academic Search

An undergraduate elective course in data mining provides a strong opportunity for students to learn research skills, practice data structures, and enhance their understanding of algorithms. I have developed a data mining course built around the idea of using research-level papers as the primary reading material for the course, and implementing data min- ing algorithms for the assignments. Such a

David R. Musicant

2006-01-01

376

The Educational Potential of Computer Networking. Interactive Technology Laboratory Report #16.  

ERIC Educational Resources Information Center

The educational potential of computer networks will be realized only when educators stop focusing on technical connections and start asking how educational activities that are supported on computer networks can make a significant contribution to education. Computer networks can contribute to accomplishing educational goals in language arts (by…

Riel, Margaret M.

377

Deep Space Network (DSN), Network Operations Control Center (NOCC) computer-human interfaces  

NASA Technical Reports Server (NTRS)

The Network Operations Control Center (NOCC) of the DSN is responsible for scheduling the resources of DSN, and monitoring all multi-mission spacecraft tracking activities in real-time. Operations performs this job with computer systems at JPL connected to over 100 computers at Goldstone, Australia and Spain. The old computer system became obsolete, and the first version of the new system was installed in 1991. Significant improvements for the computer-human interfaces became the dominant theme for the replacement project. Major issues required innovating problem solving. Among these issues were: How to present several thousand data elements on displays without overloading the operator? What is the best graphical representation of DSN end-to-end data flow? How to operate the system without memorizing mnemonics of hundreds of operator directives? Which computing environment will meet the competing performance requirements? This paper presents the technical challenges, engineering solutions, and results of the NOCC computer-human interface design.

Ellman, Alvin; Carlton, Magdi

1993-01-01

378

A New Method for Computing Attention Network Scores and Relationships between Attention Networks  

PubMed Central

The attention network test (ANT) is a reliable tool to detect the efficiency of alerting, orienting, and executive control networks. However, studies using the ANT obtained inconsistent relationships between attention networks due to two reasons: on the one hand, the inter-network relationships of attention subsystems were far from clear; on the other hand, ANT scores in previous studies were disturbed by possible inter-network interactions. Here we proposed a new computing method by dissecting cue-target conditions to estimate ANT scores and relationships between attention networks as pure as possible. The method was tested in 36 participants. Comparing to the original method, the new method showed a larger alerting score and a smaller executive control score, and revealed interactions between alerting and executive control and between orienting and executive control. More interestingly, the new method revealed unidirectional influences from alerting to executive control and from executive control to orienting. These findings provided useful information for better understanding attention networks and their relationships in the ANT. Finally, the relationships of attention networks should be considered with more experimental paradigms and techniques.

Wang, Yi-Feng; Cui, Qian; Liu, Feng; Huo, Ya-Jun; Lu, Feng-Mei; Chen, Heng; Chen, Hua-Fu

2014-01-01

379

Research on the Student-Oriented Role-Shift Teaching Model in the Computer Information Technology Course  

Microsoft Academic Search

With the advancement of information technology and the further popularization of computer education, the undergraduate education of computer information technology is facing a new challenge. Taking into consideration the current teaching situation of this course, the student-oriented role-shift teaching model is constructed. Taking Carl Rogerspsila non-directive teaching theory as the theoretical foundation, the teaching model partly shifts the center of

Nanli Zhu; Suling Yang; Wumei Ye

2009-01-01

380

An effective method for computing the noise in biochemical networks  

NASA Astrophysics Data System (ADS)

We present a simple yet effective method, which is based on power series expansion, for computing exact binomial moments that can be in turn used to compute steady-state probability distributions as well as the noise in linear or nonlinear biochemical reaction networks. When the method is applied to representative reaction networks such as the ON-OFF models of gene expression, gene models of promoter progression, gene auto-regulatory models, and common signaling motifs, the exact formulae for computing the intensities of noise in the species of interest or steady-state distributions are analytically given. Interestingly, we find that positive (negative) feedback does not enlarge (reduce) noise as claimed in previous works but has a counter-intuitive effect and that the multi-OFF (or ON) mechanism always attenuates the noise in contrast to the common ON-OFF mechanism and can modulate the noise to the lowest level independently of the mRNA mean. Except for its power in deriving analytical expressions for distributions and noise, our method is programmable and has apparent advantages in reducing computational cost.

Zhang, Jiajun; Nie, Qing; He, Miao; Zhou, Tianshou

2013-02-01

381

Report on Computing and Networking in the Space Science Laboratory by the SSL Computer Committee  

NASA Technical Reports Server (NTRS)

The Space Science Laboratory (SSL) at Marshall Space Flight Center is a multiprogram facility. Scientific research is conducted in four discipline areas: earth science and applications, solar-terrestrial physics, astrophysics, and microgravity science and applications. Representatives from each of these discipline areas participate in a Laboratory computer requirements committee, which developed this document. The purpose is to establish and discuss Laboratory objectives for computing and networking in support of science. The purpose is also to lay the foundation for a collective, multiprogram approach to providing these services. Special recognition is given to the importance of the national and international efforts of our research communities toward the development of interoperable, network-based computer applications.

Gallagher, D. L. (editor)

1993-01-01

382

Comparison of Self-Perceptions of Computer Literacy and Skills Proficiency Assessment of College Students in Entry Level Technology Courses  

ERIC Educational Resources Information Center

This study was designed to compare perceived computer literacy with skills proficiency assessment of given skill sets with a second purpose to investigate the impact of certain variables on perceptions and skills proficiency of students enrolled in an introductory college level technology course. Implementation of survey research and hands-on…

Cammack, Nancy

2008-01-01

383

Computer-Based and Paper-and-Pencil Administration Mode Effects on a Statewide End-of-Course English Test  

ERIC Educational Resources Information Center

The current study compared student performance between paper-and-pencil testing (PPT) and computer-based testing (CBT) on a large-scale statewide end-of-course English examination. Analyses were conducted at both the item and test levels. The overall results suggest that scores obtained from PPT and CBT were comparable. However, at the content…

Kim, Do-Hong; Huynh, Huynh

2008-01-01

384

Computer-Mediated Word-of-Mouth Communication: The Influence of Mixed Reviews on Student Perceptions of Instructors and Courses  

ERIC Educational Resources Information Center

The purpose of this experiment was to test the influence of mixed reviews appearing as computer-mediated word-of-mouth communication (WOM) on student perceptions of instructors (attractiveness and credibility) and attitudes toward learning course content (affective learning and state motivation). Using the heuristic-systematic processing model, it…

Edwards, Autumn; Edwards, Chad

2013-01-01

385

Reflective Behaviors under a Web-Based Portfolio Assessment Environment for High School Students in a Computer Course  

ERIC Educational Resources Information Center

This research attempted to categorize reflection in a Web-based portfolio assessment using the Chinese Word Segmenting System (CWSS). Another aim of this research was to explore reflective performance in which individual differences were further examined. Participants were 45 eight-grade students from a junior high school taking a computer course.…

Chang, Chi-Cheng; Chen, Cheng-Chuan; Chen, Yi-Hui

2012-01-01

386

A Multi-Year Investigation of the Relationship between Pedagogy, Computer Use and Course Effectiveness in Postsecondary Education  

ERIC Educational Resources Information Center

This study investigated the change in the relationship between pedagogy, computer-use and students' perceptions about course-effectiveness over time. Students from a Canadian university completed a questionnaire in two different years (2003 = 1,834 participants and 2007 = 1,866 participants). Of greatest interest were characteristics of technology…

Tamim, Rana M.; Lowerison, Gretchen; Schmid, Richard F.; Bernard, Robert M.; Abrami, Philip C.

2011-01-01

387

A replicated experiment of pair-programming in a 2nd-year software development and design computer science course  

Microsoft Academic Search

This paper presents the results of a replicated pair programming experiment conducted at the University of Auckland (NZ) during the first semester of 2005. It involved 190 second year Computer Science students attending a software design and construction course. We replicated the experiment described in (18), investigating similar issues to those reported in (32) and employing a subset of the

Emilia Mendes; Lubna Basil Al-fakhri; Andrew Luxton-reilly

2006-01-01

388

Natural Course of Spontaneous Pneumothorax without Bullae or Blebs under High-Resolution Computed Tomography.  

PubMed

Background The cause of primary spontaneous pneumothorax (PSP) is known as rupture of some bullae or blebs.Objective The aim of this study is to clarify the natural course of spontaneous pneumothorax in the absence of bullae or blebs under high-resolution chest computed tomography (HRCT).Patients and Method From January 2006 to December 2010, 854 patients with PSP were enrolled in the study group. All subjects received a chest CT scan and were reviewed retrospectively.Result There were 56 PSP cases (6.5%) without bullae or blebs under HRCT. Treatments included oxygen therapy in 16 (28.5%) cases, arrow catheter insertion in 22 (39.2%) cases, closed thoracostomy in 17 (30.3%) cases, and 1 (1.7%) case received a video-assisted thoracoscopic surgery (VATS) operation. There were nine recurrent cases (16%). Of the nine cases, eight cases were treated with VATS operation. Several bullae or blebs were found in five of those nine operated cases, and there were severe inflammatory fibrotic changes on the apex of one of the nine operated cases.Conclusion Several bullae and blebs were revealed upon operation of PSP without previously detected bullae and blebs on HRCT. We cautiously recommend operating on PSP regardless of whether bullae and blebs are detected by HRCT as long as there are no contraindications to the operation. PMID:23775414

Kim, Jung Tae; Oh, Tae Yoon; Chang, Woon Ha; Kong, Joon Hyuk; Baek, Kang Seok; Lee, Won Jin; Bang, Yun Yi

2013-06-17

389

Line-plane broadcasting in a data communications network of a parallel computer  

DOEpatents

Methods, apparatus, and products are disclosed for line-plane broadcasting in a data communications network of a parallel computer, the parallel computer comprising a plurality of compute nodes connected together through the network, the network optimized for point to point data communications and characterized by at least a first dimension, a second dimension, and a third dimension, that include: initiating, by a broadcasting compute node, a broadcast operation, including sending a message to all of the compute nodes along an axis of the first dimension for the network; sending, by each compute node along the axis of the first dimension, the message to all of the compute nodes along an axis of the second dimension for the network; and sending, by each compute node along the axis of the second dimension, the message to all of the compute nodes along an axis of the third dimension for the network.

Archer, Charles J. (Rochester, MN); Berg, Jeremy E. (Rochester, MN); Blocksome, Michael A. (Rochester, MN); Smith, Brian E. (Rochester, MN)

2010-11-23

390

Hacking Social Networks: Examining the Viability of Using Computer Network Attack Against Social Networks.  

National Technical Information Service (NTIS)

Social Network Analysis (SNA) has been proposed as a tool to defeat transnational terrorist groups such as Al Qaeda. However, SNA is an descriptive tool that is a product of sociology and not an offensive tool used to attack a social network. SNA was not ...

I. R. Schuhart

2007-01-01

391

An efficient network for interconnecting remote monitoring instruments and computers  

SciTech Connect

Remote monitoring instrumentation must be connected with computers and other instruments. The cost and intrusiveness of installing cables in new and existing plants presents problems for the facility and the International Atomic Energy Agency (IAEA). The authors have tested a network that could accomplish this interconnection using mass-produced commercial components developed for use in industrial applications. Unlike components in the hardware of most networks, the components--manufactured and distributed in North America, Europe, and Asia--lend themselves to small and low-powered applications. The heart of the network is a chip with three microprocessors and proprietary network software contained in Read Only Memory. In addition to all nonuser levels of protocol, the software also contains message authentication capabilities. This chip can be interfaced to a variety of transmission media, for example, RS-485 lines, fiber topic cables, rf waves, and standard ac power lines. The use of power lines as the transmission medium in a facility could significantly reduce cabling costs.

Halbig, J.K.; Gainer, K.E.; Klosterbuer, S.F.

1994-08-01

392

Universal quantum computation with ordered spin-chain networks  

NASA Astrophysics Data System (ADS)

It is shown that anisotropic spin chains with gapped bulk excitations and magnetically ordered ground states offer a promising platform for quantum computation, which bridges the conventional single-spin-based qubit concept with recently developed topological Majorana-based proposals. We show how to realize the single-qubit Hadamard, phase, and ?/8 gates as well as the two-qubit controlled-not (cnot) gate, which together form a fault-tolerant universal set of quantum gates. The gates are implemented by judiciously controlling Ising exchange and magnetic fields along a network of spin chains, with each individual qubit furnished by a spin-chain segment. A subset of single-qubit operations is geometric in nature, relying on control of anisotropy of spin interactions rather than their strength. We contrast topological aspects of the anisotropic spin-chain networks to those of p-wave superconducting wires discussed in the literature.

Tserkovnyak, Yaroslav; Loss, Daniel

2011-09-01

393

Universal quantum computation with ordered spin-chain networks  

SciTech Connect

It is shown that anisotropic spin chains with gapped bulk excitations and magnetically ordered ground states offer a promising platform for quantum computation, which bridges the conventional single-spin-based qubit concept with recently developed topological Majorana-based proposals. We show how to realize the single-qubit Hadamard, phase, and {pi}/8 gates as well as the two-qubit controlled-not (cnot) gate, which together form a fault-tolerant universal set of quantum gates. The gates are implemented by judiciously controlling Ising exchange and magnetic fields along a network of spin chains, with each individual qubit furnished by a spin-chain segment. A subset of single-qubit operations is geometric in nature, relying on control of anisotropy of spin interactions rather than their strength. We contrast topological aspects of the anisotropic spin-chain networks to those of p-wave superconducting wires discussed in the literature.

Tserkovnyak, Yaroslav [Department of Physics and Astronomy, University of California, Los Angeles, California 90095 (United States); Loss, Daniel [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)

2011-09-15

394

[Forensic evidence-based medicine in computer communication networks].  

PubMed

As an important component of judicial expertise, forensic science is broad and highly specialized. With development of network technology, increasement of information resources, and improvement of people's legal consciousness, forensic scientists encounter many new problems, and have been required to meet higher evidentiary standards in litigation. In view of this, evidence-based concept should be established in forensic medicine. We should find the most suitable method in forensic science field and other related area to solve specific problems in the evidence-based mode. Evidence-based practice can solve the problems in legal medical field, and it will play a great role in promoting the progress and development of forensic science. This article reviews the basic theory of evidence-based medicine and its effect, way, method, and evaluation in the forensic medicine in order to discuss the application value of forensic evidence-based medicine in computer communication networks. PMID:24665620

Qiu, Yun-Liang; Peng, Ming-Qi

2013-12-01

395

Symbolic dynamics and computation in model gene networks  

NASA Astrophysics Data System (ADS)

We analyze a class of ordinary differential equations representing a simplified model of a genetic network. In this network, the model genes control the production rates of other genes by a logical function. The dynamics in these equations are represented by a directed graph on an n-dimensional hypercube (n-cube) in which each edge is directed in a unique orientation. The vertices of the n-cube correspond to orthants of state space, and the edges correspond to boundaries between adjacent orthants. The dynamics in these equations can be represented symbolically. Starting from a point on the boundary between neighboring orthants, the equation is integrated until the boundary is crossed for a second time. Each different cycle, corresponding to a different sequence of orthants that are traversed during the integration of the equation always starting on a boundary and ending the first time that same boundary is reached, generates a different letter of the alphabet. A word consists of a sequence of letters corresponding to a possible sequence of orthants that arise from integration of the equation starting and ending on the same boundary. The union of the words defines the language. Letters and words correspond to analytically computable Poincaré maps of the equation. This formalism allows us to define bifurcations of chaotic dynamics of the differential equation that correspond to changes in the associated language. Qualitative knowledge about the dynamics found by integrating the equation can be used to help solve the inverse problem of determining the underlying network generating the dynamics. This work places the study of dynamics in genetic networks in a context comprising both nonlinear dynamics and the theory of computation.

Edwards, R.; Siegelmann, H. T.; Aziza, K.; Glass, L.

2001-03-01

396

Neural network computation with DNA strand displacement cascades.  

PubMed

The impressive capabilities of the mammalian brain--ranging from perception, pattern recognition and memory formation to decision making and motor activity control--have inspired their re-creation in a wide range of artificial intelligence systems for applications such as face recognition, anomaly detection, medical diagnosis and robotic vehicle control. Yet before neuron-based brains evolved, complex biomolecular circuits provided individual cells with the 'intelligent' behaviour required for survival. However, the study of how molecules can 'think' has not produced an equal variety of computational models and applications of artificial chemical systems. Although biomolecular systems have been hypothesized to carry out neural-network-like computations in vivo and the synthesis of artificial chemical analogues has been proposed theoretically, experimental work has so far fallen short of fully implementing even a single neuron. Here, building on the richness of DNA computing and strand displacement circuitry, we show how molecular systems can exhibit autonomous brain-like behaviours. Using a simple DNA gate architecture that allows experimental scale-up of multilayer digital circuits, we systematically transform arbitrary linear threshold circuits (an artificial neural network model) into DNA strand displacement cascades that function as small neural networks. Our approach even allows us to implement a Hopfield associative memory with four fully connected artificial neurons that, after training in silico, remembers four single-stranded DNA patterns and recalls the most similar one when presented with an incomplete pattern. Our results suggest that DNA strand displacement cascades could be used to endow autonomous chemical systems with the capability of recognizing patterns of molecular events, making decisions and responding to the environment. PMID:21776082

Qian, Lulu; Winfree, Erik; Bruck, Jehoshua

2011-07-21

397

Innovative Teaching: An Empirical Study of Computer-Aided Instruction in Quantitative Business Courses  

ERIC Educational Resources Information Center

We investigate business undergraduate mathematics-based courses in a blended environment of online assignments and exams and offline lectures, and report the impact on academic performance of factors such as classroom attendance, web-based course supplements, and homework. We present results from both ordinary least squares and fixed effects,…

Gonul, Fusun F.; Solano, Roger A.

2013-01-01

398

Using Blogging and Laptop Computers to Improve Writing Skills on a Vocational Training Course  

ERIC Educational Resources Information Center

The action research project described in this paper was part of an initiative to bring about change in the way courses are delivered in the vocational trades area at UNITEC New Zealand. We decided to focus on students' writing on a new Level 3 course--the Certificate in Automotive and Mechanical Engineering (C.A.M.E.) in which all participants had…

Marsden, Nick; Piggot-Irvine, Eileen

2012-01-01

399

Distributed process manager for an engineering network computer  

SciTech Connect

MP is a manager for systems of cooperating processes in a local area network of engineering workstations. MP supports transparent continuation by maintaining multiple copies of each process on different workstations. Computational bandwidth is optimized by executing processes in parallel on different workstations. Responsiveness is high because workstations compete among themselves to respond to requests. The technique is to select a master from among a set of replicates of a process by a competitive election between the copies. Migration of the master when a fault occurs or when response slows down is effected by inducing the election of a new master. Competitive response stabilizes system behavior under load, so MP exhibits realtime behaviors.

Gait, J.

1987-08-01

400

Determination of time-course change rate for arterial xenon using the time course of tissue xenon concentration in xenon-enhanced computed tomography  

SciTech Connect

In calculating tissue blood flow (TBF) according to the Fick principle, time-course information on arterial tracer concentration is indispensable and has a considerable influence on the accuracy of calculated TBF. In TBF measurement by xenon-enhanced computed tomography (Xe-CT), nonradioactive xenon gas is administered by inhalation as a tracer, and end-tidal xenon is used as a substitute for arterial xenon. There has been the assumption that the time-course change rate for end-tidal xenon concentration (Ke) and that for arterial xenon concentration (Ka) are substantially equal. Respiratory gas sampling is noninvasive to the patient and Ke can be easily measured by exponential curve fitting to end-tidal xenon concentrations. However, it is pointed out that there would be a large difference between Ke and Ka in many cases. The purpose of this work was to develop a method of determining the Ka value using the time course of tissue xenon concentration in Xe-CT. The authors incorporated Ka into the Kety autoradiographic equation as a parameter to be solved, and developed a method of least-squares to obtain the solution for Ka from the time-course changes in xenon concentration in the tissue. The authors applied this method of least-squares to the data from Xe-CT abdominal studies performed on 17 patients; the solution for Ka was found pixel by pixel in the spleen, and its Ka map was created for each patient. On the one hand, the authors obtained the average value of the Ka map of the spleen as the calculated Ka (Ka{sub calc}) for each patient. On the other hand, the authors measured Ka (Ka{sub meas}) using the time-course changes in CT enhancement in the abdominal aorta for each patient. There was a good correlation between Ka{sub calc} and Ka{sub meas} (r=0.966, P<0.0001), and these two Ka values were close to each other (Ka{sub calc}=0.935xKa{sub meas}+0.089). This demonstrates that Ka{sub calc} would be close to the true Ka value. Accuracy of TBF by Xe-CT can be improved with use of the average value of the Ka map of an organ like the spleen that has a single blood supply (only arterial inflow)

Sase, Shigeru; Takahashi, Hideaki; Ikeda, Hiroki; Kobayashi, Minoru; Matsumoto, Nobuyuki; Suzuki, Michihiro [Anzai Medical Co., Ltd., 3-9-15 Nishi-Shinagawa, Shinagawa-ku, Tokyo 141-0033 (Japan); Department of Internal Medicine, Division of Gastroenterology and Hepatology, School of Medicine, St. Marianna University, 2-16-1 Miyamae-ku, Sugao, Kawasaki 216-5811 (Japan)

2008-06-15

401

Application of a distributed network in computational fluid dynamic simulations  

NASA Technical Reports Server (NTRS)

A general-purpose 3-D, incompressible Navier-Stokes algorithm is implemented on a network of concurrently operating workstations using parallel virtual machine (PVM) and compared with its performance on a CRAY Y-MP and on an Intel iPSC/860. The problem is relatively computationally intensive, and has a communication structure based primarily on nearest-neighbor communication, making it ideally suited to message passing. Such problems are frequently encountered in computational fluid dynamics (CDF), and their solution is increasingly in demand. The communication structure is explicitly coded in the implementation to fully exploit the regularity in message passing in order to produce a near-optimal solution. Results are presented for various grid sizes using up to eight processors.

Deshpande, Manish; Feng, Jinzhang; Merkle, Charles L.; Deshpande, Ashish

1994-01-01

402

NML Computation Algorithms for Tree-Structured Multinomial Bayesian Networks  

PubMed Central

Typical problems in bioinformatics involve large discrete datasets. Therefore, in order to apply statistical methods in such domains, it is important to develop efficient algorithms suitable for discrete data. The minimum description length (MDL) principle is a theoretically well-founded, general framework for performing statistical inference. The mathematical formalization of MDL is based on the normalized maximum likelihood (NML) distribution, which has several desirable theoretical properties. In the case of discrete data, straightforward computation of the NML distribution requires exponential time with respect to the sample size, since the definition involves a sum over all the possible data samples of a fixed size. In this paper, we first review some existing algorithms for efficient NML computation in the case of multinomial and naive Bayes model families. Then we proceed by extending these algorithms to more complex, tree-structured Bayesian networks.

2007-01-01

403

Application of a distributed network in computational fluid dynamic simulations  

NASA Astrophysics Data System (ADS)

A general-purpose 3-D, incompressible Navier-Stokes algorithm is implemented on a network of concurrently operating workstations using parallel virtual machine (PVM) and compared with its performance on a CRAY Y-MP and on an Intel iPSC/860. The problem is relatively computationally intensive, and has a communication structure based primarily on nearest-neighbor communication, making it ideally suited to message passing. Such problems are frequently encountered in computational fluid dynamics (CDF), and their solution is increasingly in demand. The communication structure is explicitly coded in the implementation to fully exploit the regularity in message passing in order to produce a near-optimal solution. Results are presented for various grid sizes using up to eight processors.

Deshpande, Manish; Feng, Jinzhang; Merkle, Charles L.; Deshpande, Ashish

404

Predicting success of a beginning computer course using logistic regression (abstract only)  

Microsoft Academic Search

Enrollment in computer science classes have grown at an alarming rate despite often inadequate university resources and a shortage of trained computer science faculty. While the number of computer science faculty. While the number of computer science majors may now be leveling off or even declining, many other disciplines are requiring students to possess computer skills. An all too high

Ashraful A. Chowdhury; C. Van Nelson; Clinton P. Fuelling; Roy L. McCormick

1987-01-01

405

The research of Cloud Computing based on service plane over optical networks  

Microsoft Academic Search

The implementation of Cloud Computing over optical networks faces many challenges and opportunities. A cloud computing architecture over optical networks is proposed based on the service plane. And the validity of the architecture we proposed was experimentally demonstrated in our Adaptive Multi-Service Optical Network testbed.

Zhen Li; Dahai Han; Jie Zhang; Xiuzhong Chen; Wanyi Gu; Yuefeng Ji

2009-01-01

406

Providing Network Performance Isolation in VDE-Based Cloud Computing Systems  

Microsoft Academic Search

In a cloud computing system, virtual machines owned by different clients are co-hosted on a single physical machine. It is vital to isolate network performance between the clients for ensuring fair usage of the constrained and shared network resources of the physical machine. Unfortunately, the existing network performance isolation techniques are not effective for cloud computing systems because they are

Vijeta Rathore; Jonghun Yoo; Jaesoo Lee; Seongsoo Hong

2011-01-01

407

Finding and Analyzing Social Collaboration Networks in the Mexican Computer Science Community  

Microsoft Academic Search

Collaboration of peers is rather common in some scientific communities and is being facilitated with the advances in telecommunication and computer networking technologies. In this paper, we analyze the collaboration networks formed among Mexican computer science scholars, using social network analysis techniques. A series of measurements are performed to identify some patterns of collaboration both among individuals and among Mexican

L. Garcia-Bauelos; Alberto Portilla; A. Chavez-Aragon; O. F. Reyes-Galaviz; H. Ayanegui-Santiago

2009-01-01

408

Wireless broadband application technology investigation of IPv6 optical network cloud computing  

Microsoft Academic Search

With the development of 3G network and internet technology, the rapid upgrading of internet users. It is a trend that IPv6 supersedes IPv4 and the optical network becomes more widely. Integrating a number of hotspot advanced technologies, the “wireless broadband application system for IPV6 optical network cloud computing” is a novel system with practical research importance. The cloud computing platform

Gu Cai-dong; Li Jing-Xiang; Wu Jian-ping; Fu Ying-li; Lu Kan; Si Mao-xin

2010-01-01

409

Accurate and Precise Computation Using Analog VLSI, with Applications to Computer Graphics and Neural Networks.  

NASA Astrophysics Data System (ADS)

This thesis develops an engineering practice and design methodology to enable us to use CMOS analog VLSI chips to perform more accurate and precise computation. These techniques form the basis of an approach that permits us to build computer graphics and neural network applications using analog VLSI. The nature of the design methodology focuses on defining goals for circuit behavior to be met as part of the design process. To increase the accuracy of analog computation, we develop techniques for creating compensated circuit building blocks, where compensation implies the cancellation of device variations, offsets, and nonlinearities. These compensated building blocks can be used as components in larger and more complex circuits, which can then also be compensated. To this end, we develop techniques for automatically determining appropriate parameters for circuits, using constrained optimization. We also fabricate circuits that implement multi-dimensional gradient estimation for a gradient descent optimization technique. The parameter-setting and optimization tools allow us to automatically choose values for compensating our circuit building blocks, based on our goals for the circuit performance. We can also use the techniques to optimize parameters for larger systems, applying the goal-based techniques hierarchically. We also describe a set of thought experiments involving circuit techniques for increasing the precision of analog computation. Our engineering design methodology is a step toward easier use of analog VLSI to solve problems in computer graphics and neural networks. We provide data measured from compensated multipliers built using these design techniques. To demonstrate the feasibility of using analog VLSI for more quantitative computation, we develop small applications using the goal-based design approach and compensated components. Finally, we conclude by discussing the expected significance of this work for the wider use of analog VLSI for quantitative computation, as well as qualitative.

Kirk, David Blair

410

Complex network problems in physics, computer science and biology  

NASA Astrophysics Data System (ADS)

There is a close relation between physics and mathematics and the exchange of ideas between these two sciences are well established. However until few years ago there was no such a close relation between physics and computer science. Even more, only recently biologists started to use methods and tools from statistical physics in order to study the behavior of complex system. In this thesis we concentrate on applying and analyzing several methods borrowed from computer science to biology and also we use methods from statistical physics in solving hard problems from computer science. In recent years physicists have been interested in studying the behavior of complex networks. Physics is an experimental science in which theoretical predictions are compared to experiments. In this definition, the term prediction plays a very important role: although the system is complex, it is still possible to get predictions for its behavior, but these predictions are of a probabilistic nature. Spin glasses, lattice gases or the Potts model are a few examples of complex systems in physics. Spin glasses and many frustrated antiferromagnets map exactly to computer science problems in the NP-hard class defined in Chapter 1. In Chapter 1 we discuss a common result from artificial intelligence (AI) which shows that there are some problems which are NP-complete, with the implication that these problems are difficult to solve. We introduce a few well known hard problems from computer science (Satisfiability, Coloring, Vertex Cover together with Maximum Independent Set and Number Partitioning) and then discuss their mapping to problems from physics. In Chapter 2 we provide a short review of combinatorial optimization algorithms and their applications to ground state problems in disordered systems. We discuss the cavity method initially developed for studying the Sherrington-Kirkpatrick model of spin glasses. We extend this model to the study of a specific case of spin glass on the Bethe lattice at zero temperature and then we apply this formalism to the K-SAT problem defined in Chapter 1. The phase transition which physicists study often corresponds to a change in the computational complexity of the corresponding computer science problem. Chapter 3 presents phase transitions which are specific to the problems discussed in Chapter 1 and also known results for the K-SAT problem. We discuss the replica method and experimental evidences of replica symmetry breaking. The physics approach to hard problems is based on replica methods which are difficult to understand. In Chapter 4 we develop novel methods for studying hard problems using methods similar to the message passing techniques that were discussed in Chapter 2. Although we concentrated on the symmetric case, cavity methods show promise for generalizing our methods to the un-symmetric case. As has been highlighted by John Hopfield, several key features of biological systems are not shared by physical systems. Although living entities follow the laws of physics and chemistry, the fact that organisms adapt and reproduce introduces an essential ingredient that is missing in the physical sciences. In order to extract information from networks many algorithm have been developed. In Chapter 5 we apply polynomial algorithms like minimum spanning tree in order to study and construct gene regulatory networks from experimental data. As future work we propose the use of algorithms like min-cut/max-flow and Dijkstra for understanding key properties of these networks.

Cojocaru, Radu Ionut

411

Universal quantum computation in a semiconductor quantum wire network  

SciTech Connect

Universal quantum computation (UQC) using Majorana fermions on a two-dimensional topological superconducting (TS) medium remains an outstanding open problem. This is because the quantum gate set that can be generated by braiding of the Majorana fermions does not include any two-qubit gate and also no single-qubit {pi}/8 phase gate. In principle, it is possible to create these crucial extra gates using quantum interference of Majorana fermion currents. However, it is not clear if the motion of the various order parameter defects (vortices, domain walls, etc.), to which the Majorana fermions are bound in a TS medium, can be quantum coherent. We show that these obstacles can be overcome using a semiconductor quantum wire network in the vicinity of an s-wave superconductor, by constructing topologically protected two-qubit gates and any arbitrary single-qubit phase gate in a topologically unprotected manner, which can be error corrected using magic-state distillation. Thus our strategy, using a judicious combination of topologically protected and unprotected gate operations, realizes UQC on a quantum wire network with a remarkably high error threshold of 0.14 as compared to 10{sup -3} to 10{sup -4} in ordinary unprotected quantum computation.

Sau, Jay D.; Das Sarma, S. [Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States); Tewari, Sumanta [Condensed Matter Theory Center and Joint Quantum Institute, Department of Physics, University of Maryland, College Park, Maryland 20742-4111 (United States); Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634 (United States)

2010-11-15

412

Online Courses: MSU National Teachers Enhancement Network: The Dirt on Soil Science  

NSDL National Science Digital Library

The Dirt on Soil Science is a 1 credit graduate course for K-6 elementary school teachers who are interested in understanding the basic principles of soil science. This online course lasts 6-weeks and includes conversing with your instructor and classmat

1900-01-01

413

A Comparison of Mainframe and Personal Computer Based Bulletin Board Systems for Computer-Mediated Communications in Distance Education Courses.  

ERIC Educational Resources Information Center

At the University of Victoria (British Columbia), computer mediated communications have been used since 1988 in the delivery of distance education in the Certificate Program in Computer Based Information Systems. From 1988 to 1990, a university mainframe computer was used as the host for communications, but since 1990, the host has been a personal…

Muzio, Jeanette A.

414

Computer-Based and Paper-and-Pencil Administration Mode Effects on a Statewide End-of-Course English Test  

Microsoft Academic Search

The current study compared student performance between paper-and-pencil testing (PPT) and computer-based testing (CBT) on a large-scale statewide end-of-course English examination. Analyses were conducted at both the item and test levels. The overall results suggest that scores obtained from PPT and CBT were comparable. However, at the content domain level, a rather large difference in the reading comprehension section suggests

Do-Hong Kim; Huynh Huynh

2008-01-01

415

ASSESSMENT OF THE PEDAGOGICAL UTILIZATION OF THE STATISTICS ONLINE COMPUTATIONAL RESOURCE IN INTRODUCTORY PROBABILITY COURSES: A QUASI-EXPERIMENT  

Microsoft Academic Search

Java-applets have proved to be effective in different settings to demonstrate statistical concepts. The NSF-funded Statistics Online Computational Resource (SOCR) provides a number of interactive tools for enhancing instruction in various undergraduate and graduate courses in probability and statistics. In this paper, we present the results of a quasi-experiment aimed at assessing the effect of moderate use of SOCR on

Ivo Dinov; Juana Sanchez

2006-01-01

416

Computer-mediated communication and the linking of students, text, and author on an ESL writing course listserv  

Microsoft Academic Search

This paper addresses an issue of interest to many first- (L1) and second-language (L2) writing theorists and teachers: the role(s) that computer-mediated communication (CMC) can play in making writing instruction more effective and more meaningful, particularly in the highly technological early years of the twenty-first century. This paper explores the use of CMC in the form of a writing course

Alan Hirvela

2007-01-01

417

Games as motivation in computer design courses: I\\/O is the key  

Microsoft Academic Search

The design of computer games can be a powerful motivator as students learn about computer architecture and design. Students in classes where computer designs are developed and implemented (usually on Field Programmable Gate Arrays (FPGAs)) seem much more highly motivated if their computer design can be used for something visual and interactive when the project is complete. However, ensuring that

Erik Brunvand

2011-01-01

418

A personal computer network system for equitable allocation of cadaver organs.  

PubMed

We developed a personal computer network system for the equitable allocation of cadaveric organs. This network consists of a host computer (IBM PS55 model 5570 T) and various kinds of personal computers manufactured by many different computer makers in Japan. The merits of our personal computer network include lower cost and an easy access to the host computer from all the centres participating in this network while using their own favourite personal computers. Among the programs made for allocating cadaveric organs, we present in this paper the program for livers. This program was developed with a modified version of the logic developed by Starzl et al. The grade modification for the United Network for Organ Sharing (UNOS) in the United States was used as the basis for classification of medical urgency. Our program weighed the factors of medical urgency, compatibility of blood group and waiting time. Distance factors were omitted because of the smaller area of the network compared to that of UNOS. This computer network would be linked to other computer networks in creating a national organ procurement and transplant network in Japan, in order to help them to catch up with other advanced transplant countries. Such an equal and objective computer system should allow organ transplantation to become more widely accepted. PMID:1758219

Shimada, M; Akazawa, K; Moriguchi, S; Odaka, T; Nose, Y

1991-01-01

419

Computing with geometry as an undergraduate course: a three-year experience  

Microsoft Academic Search

Computing with geometry is a rapidly evolving interdis-ciplinary field involving computer science, engineering and mathematics. It has relationships to many other ar-eas within computer science (e. g., computational geom-etry, graphics, information\\/scientific visualization and computer vision) and serves as a vehicle for engineering students to approach product design and manufactur-ing processes. Moreover, this is a geometric world! Un-fortunately, in a typical

John L. Lowther; Ching-Kuang Shene

2001-01-01

420

Using an Instructional LAN to Teach a Statistics Course.  

ERIC Educational Resources Information Center

Discusses a computer assisted learning system for engineering statistics based on personalized system of instruction methods. Describes the system's network, development, course structure, programing, and security. Lists the benefits of the system. (MVL)

Barnes, J. Wesley; And Others

1988-01-01

421

Computer-Controller Ophthalmic Refraction. Analysis of a Computer Network versus a Central Computer.  

National Technical Information Service (NTIS)

This paper studies the projected organization and cost of a prototype computer-assisted eye clinic designed to supply one optometrist with an optimal flow of patients by freeing him/her from all tasks which do not require the professional skills of the op...

E. Marg J. Braswell I. Lee

1977-01-01

422

Identification of optimal drug combinations targeting cellular networks: integrating phospho-proteomics and computational network analysis  

PubMed Central

Targeted therapeutics hold tremendous promise in inhibiting cancer cell proliferation. However, targeting proteins individually can be compensated for by bypass mechanisms and activation of regulatory loops. Designing optimal therapeutic combinations must therefore take into consideration the complex dynamic networks in the cell. In this study, we analyzed the insulin-like growth factor (IGF-1) signaling network in the MDA-MB231 breast cancer cell line. We used reverse phase protein array to measure the transient changes in the phosphorylation of proteins after IGF-1 stimulation. We developed a computational procedure that integrated mass-action modeling with particle swarm optimization to train the model against the experimental data and infer the unknown model parameters. The trained model was used to predict how targeting individual signaling proteins altered the rest of the network and identify drug combinations that minimally increased phosphorylation of other proteins elsewhere in the network. Experimental testing of the modeling predictions showed that optimal drug combinations inhibited cell signaling and proliferation, while non-optimal combination of inhibitors increased phosphorylation of non-targeted proteins and rescued cells from cell death. The integrative approach described here is useful for generating experimental intervention strategies that could optimize drug combinations and discover novel pharmacologic targets for cancer therapy.

Iadevaia, Sergio; Lu, Yiling; Morales, Fabiana C.; Mills, Gordon B.; Ram, Prahlad T.

2010-01-01

423

Instructional Strategies for Achieving a Positive Impression in Computer-Mediated Communication (CMC) Distance Education Courses.  

ERIC Educational Resources Information Center

With the rapid development of computer technology in recent years, distance education, and especially computer-mediated communication (CMC), has expanded very quickly. The application of computer technology in education presents many unanswered questions, including issues related to impression formation and impression management in…

Liu, Yuliang; Ginther, Dean W.

424

An Introductory Course on Service-Oriented Computing for High Schools  

ERIC Educational Resources Information Center

Service-Oriented Computing (SOC) is a new computing paradigm that has been adopted by major computer companies as well as government agencies such as the Department of Defense for mission-critical applications. SOC is being used for developing Web and electronic business applications, as well as robotics, gaming, and scientific applications. Yet,…

Tsai, W. T.; Chen, Yinong; Cheng, Calvin; Sun, Xin; Bitter, Gary; White, Mary

2008-01-01

425

Reduction -- an abstract thinking pattern: the case of the computational models course  

Microsoft Academic Search

Abstraction has been the focus of many researches in mathematics education and to some extent in computer science education. Abstract thinking characterizes the theoretical foundations of computer science, where reduction is one important abstract thinking pattern. In a previous work, we discussed the issue of reductive thinking among high school students in relation to computational models -- a theoretical unit.

Michal Armoni; Judith Gal-Ezer

2006-01-01

426

A Computational Drug-Target Network for Yuanhu Zhitong Prescription  

PubMed Central

Yuanhu Zhitong prescription (YZP) is a typical and relatively simple traditional Chinese medicine (TCM), widely used in the clinical treatment of headache, gastralgia, and dysmenorrhea. However, the underlying molecular mechanism of action of YZP is not clear. In this study, based on the previous chemical and metabolite analysis, a complex approach including the prediction of the structure of metabolite, high-throughput in silico screening, and network reconstruction and analysis was developed to obtain a computational drug-target network for YZP. This was followed by a functional and pathway analysis by ClueGO to determine some of the pharmacologic activities. Further, two new pharmacologic actions, antidepressant and antianxiety, of YZP were validated by animal experiments using zebrafish and mice models. The forced swimming test and the tail suspension test demonstrated that YZP at the doses of 4?mg/kg and 8?mg/kg had better antidepressive activity when compared with the control group. The anxiolytic activity experiment showed that YZP at the doses of 100?mg/L, 150?mg/L, and 200?mg/L had significant decrease in diving compared to controls. These results not only shed light on the better understanding of the molecular mechanisms of YZP for curing diseases, but also provide some evidence for exploring the classic TCM formulas for new clinical application.

Lu, Peng; Zhang, Fangbo; Yuan, Yuan; Wang, Songsong

2013-01-01

427

WaveJava: Wavelet-based network computing  

NASA Astrophysics Data System (ADS)

Wavelet is a powerful theory, but its successful application still needs suitable programming tools. Java is a simple, object-oriented, distributed, interpreted, robust, secure, architecture-neutral, portable, high-performance, multi- threaded, dynamic language. This paper addresses the design and development of a cross-platform software environment for experimenting and applying wavelet theory. WaveJava, a wavelet class library designed by the object-orient programming, is developed to take advantage of the wavelets features, such as multi-resolution analysis and parallel processing in the networking computing. A new application architecture is designed for the net-wide distributed client-server environment. The data are transmitted with multi-resolution packets. At the distributed sites around the net, these data packets are done the matching or recognition processing in parallel. The results are fed back to determine the next operation. So, the more robust results can be arrived quickly. The WaveJava is easy to use and expand for special application. This paper gives a solution for the distributed fingerprint information processing system. It also fits for some other net-base multimedia information processing, such as network library, remote teaching and filmless picture archiving and communications.

Ma, Kun; Jiao, Licheng; Shi, Zhuoer

1997-04-01

428

An Investigative Laboratory Course in Human Physiology Using Computer Technology and Collaborative Writing  

ERIC Educational Resources Information Center

Active investigative student-directed experiences in laboratory science are being encouraged by national science organizations. A growing body of evidence from classroom assessment supports their effectiveness. This study describes four years of implementation and assessment of an investigative laboratory course in human physiology for 65…

FitzPatrick, Kathleen A.

2004-01-01

429

Using a Modular Construction Kit for the Realization of an Interactive Computer Graphics Course.  

ERIC Educational Resources Information Center

Recently, platform independent software components, like JavaBeans, have appeared that allow writing reusable components and composing them in a visual builder tool into new applications. This paper describes the use of such models to transform an existing course into a modular construction kit consisting of components of teaching text and program…

Klein, Reinhard; Hanisch, Frank

430

Telecommunications network design using modeling and simulation  

Microsoft Academic Search

This paper is intended to help instructors integrate the use of computer simulation methodologies in senior and graduate level courses in telecommunications and computer networks design. It outlines how the course and its laboratory can be organized, and recommends a set of projects, textbooks, and articles that could be used in the course. This paper reviews the obstacles that for

Miguel Angel Olabe; Juan Carlos Olabe

1998-01-01

431

Providing full point-to-point communications among compute nodes of an operational group in a global combining network of a parallel computer  

DOEpatents

Methods, apparatus, and products are disclosed for providing full point-to-point communications among compute nodes of an operational group in a global combining network of a parallel computer, each compute node connected to each adjacent compute node in the global combining network through a link, that include: receiving a network packet in a compute node, the network packet specifying a destination compute node; selecting, in dependence upon the destination compute node, at least one of the links for the compute node along which to forward the network packet toward the destination compute node; and forwarding the network packet along the selected link to the adjacent compute node connected to the compute node through the selected link.

Archer, Charles J; Faraj, Ahmad A; Inglett, Todd A; Ratterman, Joseph D

2013-04-16

432

Conference on Computers in Undergraduate Science Education: A Computer-Assisted and Managed Course in Physical Sciences.  

National Technical Information Service (NTIS)

Computer-based approches to physics instruction have been explored at a number of research and development centers throughout the world. The presentation briefly reviews some university efforts in this area, mainly the development of an autonomous multi-m...

O. M. Kromhout D. N. Hansen G. Schwarz

1970-01-01

433

A review on the computational approaches for gene regulatory network construction.  

PubMed

Many biological research areas such as drug design require gene regulatory networks to provide clear insight and understanding of the cellular process in living cells. This is because interactions among the genes and their products play an important role in many molecular processes. A gene regulatory network can act as a blueprint for the researchers to observe the relationships among genes. Due to its importance, several computational approaches have been proposed to infer gene regulatory networks from gene expression data. In this review, six inference approaches are discussed: Boolean network, probabilistic Boolean network, ordinary differential equation, neural network, Bayesian network, and dynamic Bayesian network. These approaches are discussed in terms of introduction, methodology and recent applications of these approaches in gene regulatory network construction. These approaches are also compared in the discussion section. Furthermore, the strengths and weaknesses of these computational approaches are described. PMID:24637147

Chai, Lian En; Loh, Swee Kuan; Low, Swee Thing; Mohamad, Mohd Saberi; Deris, Safaai; Zakaria, Zalmiyah

2014-05-01

434

Multiple Case Studies to Enhance Project-Based Learning in a Computer Architecture Course  

Microsoft Academic Search

The IEEE\\/Association for Computing Machinery (ACM) Computing Curricula and the Accreditation Board of Engineering and Technology (ABET) Evaluation Criteria 2000 emphasize the use of recurrent concepts and system design\\/evaluation through projects and case studies in the curriculum of Computer and Electrical Engineering. In addition, efficient teamwork, autonomy, and initiative are commonly required qualifications for a professional in this field. Project-based

Alejandra Martínez-Monés; Eduardo Gómez-Sánchez; Yannis A. Dimitriadis; Iván M. Jorrín-Abellán; Bartolomé Rubia-Avi; Guillermo Vega-Gorgojo

2005-01-01

435

Role of personal desktop computers in the Argonne integrated heterogeneous file transfer network  

Microsoft Academic Search

This presentation described the computing environment at Argonne National Laboratory and the actions underway to integrate personal desktop computers into a coherent hierarchy of computing systems connected through a heterogeneous file transfer network. We regard the arrival of personal desktop computers as both inevitable and benign, and we are pursuing policies to ensure that they are compatible with and complementary

1984-01-01

436

Description and computational modeling of the whole course of status epilepticus induced by low dose lithium-pilocarpine in rats.  

PubMed

The main purposes of this study were (1) to describe the whole course of status epilepticus induced by a low dose lithium-pilocarpine model in rats, including depth-EEG from the hippocampus, ECoG from cortex and gross behaviors, and (2) to investigate the possible changes of the intrinsic neural network in the hippocampus during the status epilepticus by model simulation. The course of the induced status epilepticus was divided into baseline, pre-ictal, episodic, onset, continuous, and convalescence stages. At the pre-ictal stage, the main component of the spectrum of the depth-EEG shifted before seizure activity first appeared in the hippocampus at the episodic stage and propagated to the cortex at the onset stage. Model simulation indicated that the changes of depth-EEG of the whole course could be simulated by changes of the loop gains and the inputs of the neural network. The excitatory and inhibitory loops were first enhanced in the pre-ictal stage. The isolated seizures in the episodic stage were caused by variations of inputs from other pyramidal cells. The gain of slow inhibitory loop gradually decreased, leading to the onset of status epilepticus. Different types of waveforms in the status epilepticus corresponded to the different ratio of excitatory and inhibitory influence, caused by different levels of inhibition. Finally, in the convalescence stage, the gains of the excitatory loop and the inhibitory loop both changed toward the base line, recovering the balance. The changes of the parameters in the model were compatible with the experimental results in the literature. PMID:21911214

Chiang, Chia-Chu; Ju, Ming-Shaung; Lin, Chou-Ching K

2011-10-12

437

SHORT COURSE PROCEEDINGS, APPLICATIONS OF COMPUTER PROGRAMS IN THE PRELIMINARY DESIGN OF WASTEWATER TREATMENT FACILITIES. SECTION II. USERS' GUIDE AND PROGRAM LISTING  

EPA Science Inventory

This document contains a portion of the material used for the Short Course on the Applications of Computer Programs in Preliminary Design of Wastewater Treatment Facilities. The short course lectures appear in Section I of the report which is under separate cover. Section II, con...

438

INTERACT-CANCER. The Development and Evaluation of a Computer-Assisted Course on Communication Skills for Medical Specialists in Oncology.  

ERIC Educational Resources Information Center

An interactive, computer-assisted communications skills course, which can fit easily into the busy schedule of medical specialists is presented. A new training method was developed and tested for its appeal to the target group (N=33). Course was evaluated for its relevance, value, and attraction. Results are included and discussed. (EMK)

Hulsman, Robert L.; Ros, Wynand J. G.; Janssen, Miriam; Winnubst, Jacques A. M.

1997-01-01

439

Computer simulation of the segmental neural network generating locomotion in lamprey by using populations of network interneurons  

Microsoft Academic Search

Realistic computer simulations of the experimentally established local spinal cord neural network generating swimming in the lamprey have been performed. Populations of network interneurons were used in which cellular properties, like cell size and membrane conductance including voltage dependent ion channels were randomly distributed around experimentally obtained mean values, as were synaptic conductances (kainate\\/AMPA, NMDA, glycine) and delays. This population

Jeanette Hellgren; Sten Grillner; Anders Lansner

1992-01-01

440

Investigating Patterns of Interaction in Networked Learning and Computer-Supported Collaborative Learning: A Role for Social Network Analysis  

ERIC Educational Resources Information Center

The focus of this study is to explore the advances that Social Network Analysis (SNA) can bring, in combination with other methods, when studying Networked Learning/Computer-Supported Collaborative Learning (NL/CSCL). We present a general overview of how SNA is applied in NL/CSCL research; we then go on to illustrate how this research method can…

de Laat, Maarten; Lally, Vic; Lipponen, Lasse; Simons, Robert-Jan

2007-01-01

441

An accelerated introductory computer science course sequence for non-traditional Master's students  

Microsoft Academic Search

All Computer Science Departments that offer graduate degrees share a common problem---many students, with degrees in other disciplines, apply to pursue a Master's degree in Computer Science, but have to make up a large number of undergraduate deficiencies before taking graduate classes. These students are typically above traditional age, have jobs and families, and cannot easily afford to make the

J. Denbigh Starkey; Ray S. Babcock; Anne S. DeFrance

1997-01-01

442

A Series of Molecular Dynamics and Homology Modeling Computer Labs for an Undergraduate Molecular Modeling Course  

ERIC Educational Resources Information Center

As computational modeling plays an increasingly central role in biochemical research, it is important to provide students with exposure to common modeling methods in their undergraduate curriculum. This article describes a series of computer labs designed to introduce undergraduate students to energy minimization, molecular dynamics simulations,…

Elmore, Donald E.; Guayasamin, Ryann C.; Kieffer, Madeleine E.

2010-01-01

443

A first course in computational science: (why a math book isn't enough)  

Microsoft Academic Search

There is a change underway in the CS curriculum that reflects a renewed emphasis upon solving applications. Computational science applies solution methods to various scientific models. However, following a computational science approach means more than just using formulas out of a math book. It means having a scientific mindset, understanding and using a scientific approach, thoroughly testing both the theoretical

James L. Noyes

2002-01-01

444

An Instructor's Guide to Collaborative Writing with CECE Talk: A Computer Network Tool.  

ERIC Educational Resources Information Center

Describing a computer network communication tool which allows users to communicate concurrently across networked, advanced-function workstations, this guide presents information on how to use the Center for Educational Computing in English (CECE) Talk in the writing classroom. The guide focuses on three topics: (1) introducing CECE Talk to…

Neuwirth, Christine M.; And Others

445

Design and implementation of a distributed virtual machine for networked computers  

Microsoft Academic Search

This paper describes the motivation, architecture and performance of a distributed virtual machine (DVM) for networked computers. DVMs rely on a distributed service architecture to meet the manageability, security and uniformity requirements of large, heterogeneous clusters of networked computers. In a DVM, system services, such as verification, security enforcement, compilation and optimization, are factored out of clients and located on

Emin Gün Sirer; Robert Grimm; Arthur J. Gregory; Brian N. Bershad

1999-01-01

446

Factor Analytic Approach to Computer Network\\/Information Security Awareness in South-Western Nigeria  

Microsoft Academic Search

This study was designed to investigate Computer Network Security awareness using a factor analytic approach with Principal factoring method. The principal objective of the study principally was to determine and identify how many latent constructs actually influence Computer Network Security usage and the underlying relationship among them. The work also sought to investigate whether there exists any regularity and order

B. K. Alese; O. J. Olojo; O. S. Adewale; A. A. Adetunmbi

2007-01-01

447

Fluid Centrality: A Social Network Analysis of Social-Technical Relations in Computer-Mediated Communication  

ERIC Educational Resources Information Center

In this article, centrality is explored as a measure of computer-mediated communication (CMC) in networked learning. Centrality measure is quite common in performing social network analysis (SNA) and in analysing social cohesion, strength of ties and influence in CMC, and computer-supported collaborative learning research. It argues that measuring…

Enriquez, Judith Guevarra

2010-01-01

448

Predicting FDDI computer network performance using a calibrated software simulation model  

Microsoft Academic Search

This report discusses two related activities. The first is the development of a software simulation that predicts the performance of a computer network under different loading conditions. The second is the validation of that simulation. The simulation model is configured to match a laboratory computer network, and each is subjected to similar traffic. The goal of these activities is to

Stephen Dempsey; William J. Reilly; Michael Teter; Leonard Weinberg

1997-01-01

449

NASF transposition network: A computing network for unscrambling p-ordered vectors  

NASA Technical Reports Server (NTRS)

The viewpoints of design, programming, and application of the transportation network (TN) is presented. The TN is a programmable combinational logic network that connects 521 memory modules to 512 processors. The unscrambling of p-ordered vectors to 1-ordered vectors in one cycle is described. The TN design is based upon the concept of cyclic groups from abstract algebra and primitive roots and indices from number theory. The programming of the TN is very simple, requiring only 20 bits: 10 bits for offset control and 10 bits for barrel switch shift control. This simple control is executed by the control unit (CU), not the processors. Any memory access by a processor must be coordinated with the CU and wait for all other processors to come to a synchronization point. These wait and synchronization events can be a degradation in performance to a computation. The TN application is for multidimensional data manipulation, matrix processing, and data sorting, and can also perform a perfect shuffle. Unlike other more complicated and powerful permutation networks, the TN cannot, if possible at all, unscramble non-p-ordered vectors in one cycle.

Lim, R. S.

1979-01-01

450

Using IP networks as a deviceless storage for future portable computers  

Microsoft Academic Search

In this paper we propose a generic architecture for a small powerful mobile computer that relies on network and its servers for majority of its activities. Since the network is located in middle of this architecture, we discuss the feasibility and capacity of using the network as a temporary dynamic storage in the form of cache for limited and frequently

S. R. K. Tabbakh; B. M. Ali; S. Khatun

2010-01-01

451

Pacific Educational Computer Network Study; Results of the Second Planning and Review Meeting, January 9, 1974.  

ERIC Educational Resources Information Center

A special subconference on Computer Networks featured a number of status reports from institutions represented at the planning meeting. Among the topics discussed were: the possibility of connecting the ARPA network to Pacific network nodes, the use of satellites for international data transmission, the implications of the broadcast mode of…

Mai, Karen Ah

452

The time course of alerting effect over orienting in the attention network test  

Microsoft Academic Search

In the present experiment we used a version of the attention network test (ANT) similar to that of Callejas et al. (Exp Brain\\u000a Res 167:27–37, 2005) to assess the Posner’s attention networks (alerting, orienting and conflict), and their interactions. We observed shorter\\u000a reaction times with alerting tone than with no alerting tone trials (the alerting effect); with cued than with

Luis J. Fuentes; Guillermo Campoy

2008-01-01

453

Design and implementation of a distributed virtual machine for networked computers  

Microsoft Academic Search

Abstract This paper describes the motivation, architecture and performance,of a ,distributed virtual machine ,(DVM) for networked,computers. DVMs rely on a ,distributed service architecture to meet the manageability, security and uniformity requirements of large, heterogeneous clusters of networked computers. In a DVM, system services, such as verification, security enforcement, compilation and optimization, are factored out of clients and located on powerful,network

Emin Gün Sirer; Robert Grimm; Arthur J. Gregory; Brian N. Bershad

2000-01-01

454

Using computers to overcome math-phobia in an introductory course in musical acoustics  

NASA Astrophysics Data System (ADS)

In recent years, the desktop computer has acquired the signal processing and visualization capabilities once obtained only with expensive specialized equipment. With the appropriate A/D card and software, a PC can behave like an oscilloscope, a real-time signal analyzer, a function generator, and a synthesizer, with both audio and visual outputs. In addition, the computer can be used to visualize specific wave behavior, such as superposition and standing waves, refraction, dispersion, etc. These capabilities make the computer an invaluable tool to teach basic acoustic principles to students with very poor math skills. In this paper I describe my approach to teaching the introductory-level Physics of Musical Sound at Central Washington University, in which very few science students enroll. Emphasis is placed on how vizualization with computers can help students appreciate and apply quantitative methods for analyzing sound.

Piacsek, Andrew A.

2002-11-01

455

Delivering Continuing Education to the Pharmacist: Correspondence Course versus Computer-Assisted Instruction.  

ERIC Educational Resources Information Center

A study of the effectiveness of two teaching methods, correspondence study and computer-assisted instruction, for professional continuing education in pharmacokinetics found that both were effective methods. (AUTHOR/MSE)

Knoll, K. Richard; And Others

1988-01-01

456

Navigation Maps in a Computer-Networked Hypertext Learning System.  

ERIC Educational Resources Information Center

A study of first-year college students (n=121) in Taiwan investigated the effects of navigation maps and learner cognitive styles on performance in searches for information, estimation of course scope, and the development of cognitive maps within a hypertext learning course. Students were tested to determine level of perceptual field dependence…

Chou, Chien; Lin, Hua

457

A prototype computer network service for occupational therapists.  

PubMed

Due to recent reforms, the demands on the people working in community-oriented health care service are increasing. The individual providers need professional knowledge and skills to perform their tasks quickly and safely. The individuals are also confronted with new tasks and situations of which they lack experience. At the same time, the resources for education and development are decreasing. The aim of this paper is to describe the implementation of a prototype computer network service to support occupational therapists in their daily work. A customized Quality Function Deployment (QFD) model, including participatory design elements, was used for: (a) identification of the occupational therapists' needs; and (b) for the transformation of these needs to prioritized design attributes. The main purpose of the prototype was to improve the visualization of the design attributes that were found to support the occupational therapists. An additional purpose was to be able to evaluate the design attributes and further improve them. The specific aim of this article is to describe the initial prototype with respect both to the tools and the information content. PMID:10215176

Hallberg, N; Johansson, M; Timpka, T

1999-04-01

458

Honey characterization using computer vision system and artificial neural networks.  

PubMed

This paper reports the development of a computer vision system (CVS) for non-destructive characterization of honey based on colour and its correlated chemical attributes including ash content (AC), antioxidant activity (AA), and total phenolic content (TPC). Artificial neural network (ANN) models were applied to transform RGB values of images to CIE L*a*b* colourimetric measurements and to predict AC, TPC and AA from colour features of images. The developed ANN models were able to convert RGB values to CIE L*a*b* colourimetric parameters with low generalization error of 1.01±0.99. In addition, the developed models for prediction of AC, TPC and AA showed high performance based on colour parameters of honey images, as the R(2) values for prediction were 0.99, 0.98, and 0.87, for AC, AA and TPC, respectively. The experimental results show the effectiveness and possibility of applying CVS for non-destructive honey characterization by the industry. PMID:24767037

Shafiee, Sahameh; Minaei, Saeid; Moghaddam-Charkari, Nasrollah; Barzegar, Mohsen

2014-09-15

459

Adaptive Management of Computing and Network Resources for Spacecraft Systems  

NASA Technical Reports Server (NTRS)

It is likely that NASA's future spacecraft systems will consist of distributed processes which will handle dynamically varying workloads in response to perceived scientific events, the spacecraft environment, spacecraft anomalies and user commands. Since all situations and possible uses of sensors cannot be anticipated during pre-deployment phases, an approach for dynamically adapting the allocation of distributed computational and communication resources is needed. To address this, we are evolving the DeSiDeRaTa adaptive resource management approach to enable reconfigurable ground and space information systems. The DeSiDeRaTa approach embodies a set of middleware mechanisms for adapting resource allocations, and a framework for reasoning about the real-time performance of distributed application systems. The framework and middleware will be extended to accommodate (1) the dynamic aspects of intra-constellation network topologies, and (2) the complete real-time path from the instrument to the user. We are developing a ground-based testbed that will enable NASA to perform early evaluation of adaptive resource management techniques without the expense of first deploying them in space. The benefits of the proposed effort are numerous, including the ability to use sensors in new ways not anticipated at design time; the production of information technology that ties the sensor web together; the accommodation of greater numbers of missions with fewer resources; and the opportunity to leverage the DeSiDeRaTa project's expertise, infrastructure and models for adaptive resource management for distributed real-time systems.

Pfarr, Barbara; Welch, Lonnie R.; Detter, Ryan; Tjaden, Brett; Huh, Eui-Nam; Szczur, Martha R. (Technical Monitor)

2000-01-01

460

An Ethnographic, Controlled Study of the Use of a Computer-based Histology Atlas during a Laboratory Course  

PubMed Central

Objective: To evaluate the use and effect of a computer-based histology atlas during required laboratory sessions in a medical school histology course. Design: Ethnographic observation of students' interactions in a factorial, controlled setting. Measurements: Ethnographer's observations; student and instructor self-report survey after each laboratory session with items rated from 1 (least) to 7 (best); microscope practicum scores at the end of the course. Results: Between groups assigned the atlas and those not, the ethnographer found qualitative differences in the semantic categories used by students in communicating with each other and with the faculty. Differences were also found in the quality of the interactions and in the learning styles used with and without the computer present in the laboratory. The most interactive learning style was achieved when a pair of students shared a computer and a microscope. Practicum grades did not change with respect to historical controls. Students assigned the atlas, compared with those not assigned, reported higher overall satisfaction (a difference in score of 0.1, P = 0.003) and perceived their fellow students to be more helpful (a difference of 0.11, P = 0.035). They rated the usefulness of the microscope lower (a difference of 0.23, P < 0.001). Conclusion: A computer-based histology atlas induces qualitative changes in the histology laboratory environment. Most students and faculty reacted positively. The authors did not measure the impact on learning, but they found that there are aspects of using the atlas that instructors must manipulate to make learning optimal. Ethnographic techniques can be helpful in delineating the context and defining what the interventions might be.

Lehmann, Harold P.; Freedman, Joan A.; Massad, John; Dintzis, Renee Z.

1999-01-01

461

Reference Uses of Campus Computer Networks: A Bibliographic Guide.  

ERIC Educational Resources Information Center

Discusses the application of new generation, external broadband telecommunications networks to academic library reference services. Several of the prominent networks are described, a selected bibliography of 20 recent publications is provided, and addresses for obtaining further information are listed. (CLB)

Rockman, Ilene F.

1990-01-01

462

Computer generation of symbolic network functions - A new theory and implementation.  

NASA Technical Reports Server (NTRS)

A new method is presented for obtaining network functions in which some, none, or all of the network elements are represented by symbolic parameters (i.e., symbolic network functions). Unlike the topological tree enumeration or signal flow graph methods generally used to derive symbolic network functions, the proposed procedure employs fast, efficient, numerical-type algorithms to determine the contribution of those network branches that are not represented by symbolic parameters. A computer program called NAPPE (for Network Analysis Program using Parameter Extractions) and incorporating all of the concepts discussed has been written. Several examples illustrating the usefulness and efficiency of NAPPE are presented.

Alderson, G. E.; Lin, P.-M.

1972-01-01

463

System and method for providing a high performance network connection service for distributed computing applications  

US Patent & Trademark Office Database

A system and method are disclosed for providing a high performance network connection service (HPNCS) for distributed computing applications. The HPNCS provides a network abstraction layer to the distributed applications and provides an interface to the underlying high performance on-demand dynamic circuit network (DCN). The HPNCS may relieve performance bottleneck problems encountered by the distributed applications due to the limited available networking bandwidth. The HPNCS may be used by distributed applications that need to access dedicated high performance network connection resources, such as DCN circuits, on an as-needed basis without over consuming expensive network resources.

2014-05-20

464

The time course of task-specific memory consolidation effects in resting state networks.  

PubMed

Previous studies have reported functionally localized changes in resting-state brain activity following a short period of motor learning, but their relationship with memory consolidation and their dependence on the form of learning is unclear. We investigate these questions with implicit or explicit variants of the serial reaction time task (SRTT). fMRI resting-state functional connectivity was measured in human subjects before the tasks, and 0.1, 0.5, and 6 h after learning. There was significant improvement in procedural skill in both groups, with the group learning under explicit conditions showing stronger initial acquisition, and greater improvement at the 6 h retest. Immediately following acquisition, this group showed enhanced functional connectivity in networks including frontal and cerebellar areas and in the visual cortex. Thirty minutes later, enhanced connectivity was observed between cerebellar nuclei, thalamus, and basal ganglia, whereas at 6 h there was enhanced connectivity in a sensory-motor cortical network. In contrast, immediately after acquisition under implicit conditions, there was increased connectivity in a network including precentral and sensory-motor areas, whereas after 30 min a similar cerebello-thalamo-basal ganglionic network was seen as in explicit learning. Finally, 6 h after implicit learning, we found increased connectivity in medial temporal cortex, but reduction in precentral and sensory-motor areas. Our findings are consistent with predictions that two variants of the SRTT task engage dissociable functional networks, although there are also networks in common. We also show a converging and diverging pattern of flux between prefrontal, sensory-motor, and parietal areas, and subcortical circuits across a 6 h consolidation period. PMID:24623776

Sami, Saber; Robertson, Edwin M; Miall, R Chris

2014-03-12

465

The Time Course of Task-Specific Memory Consolidation Effects in Resting State Networks  

PubMed Central

Previous studies have reported functionally localized changes in resting-state brain activity following a short period of motor learning, but their relationship with memory consolidation and their dependence on the form of learning is unclear. We investigate these questions with implicit or explicit variants of the serial reaction time task (SRTT). fMRI resting-state functional connectivity was measured in human subjects before the tasks, and 0.1, 0.5, and 6 h after learning. There was significant improvement in procedural skill in both groups, with the group learning under explicit conditions showing stronger initial acquisition, and greater improvement at the 6 h retest. Immediately following acquisition, this group showed enhanced functional connectivity in networks including frontal and cerebellar areas and in the visual cortex. Thirty minutes later, enhanced connectivity was observed between cerebellar nuclei, thalamus, and basal ganglia, whereas at 6 h there was enhanced connectivity in a sensory-motor cortical network. In contrast, immediately after acquisition under implicit conditions, there was increased connectivity in a network including precentral and sensory-motor areas, whereas after 30 min a similar cerebello-thalamo-basal ganglionic network was seen as in explicit learning. Finally, 6 h after implicit learning, we found increased connectivity in medial temporal cortex, but reduction in precentral and sensory-motor areas. Our findings are consistent with predictions that two variants of the SRTT task engage dissociable functional networks, although there are also networks in common. We also show a converging and diverging pattern of flux between prefrontal, sensory-motor, and parietal areas, and subcortical circuits across a 6 h consolidation period.

Sami, Saber; Robertson, Edwin M.

2014-01-01

466

Novel photonic bandgap based architectures for quantum computers and networks  

NASA Astrophysics Data System (ADS)

All of the approaches for quantum information processing have their own advantages, but unfortunately also their own drawbacks. Ideally, one would merge the most attractive features of those different approaches in a single technology. We envision that large-scale photonic crystal (PC) integrated circuits and fibers could be the basis for robust and compact quantum circuits and processors of the next generation quantum computers and networking devices. Cavity QED, solid-state, and (non)linear optical models for computing, and optical fiber approach for communications are the most promising candidates to be improved through this novel technology. In our work, we consider both digital and analog quantum computing. In the digital domain, we first perform gate-level analysis. To achieve this task, we solve the Jaynes-Cummings Hamiltonian with time-dependent coupling parameters under the dipole and rotating-wave approximations for a 3D PC single-mode cavity with a sufficiently high Q-factor. We then exploit the results to show how to create a maximally entangled state of two atoms and how to implement several quantum logic gates: a dual-rail Hadamard gate, a dual-rail NOT gate, and a SWAP gate. In all of these operations, we synchronize atoms, as opposed to previous studies with PCs. The method has the potential for extension to N-atom entanglement, universal quantum logic operations, and the implementation of other useful, cavity QED-based quantum information processing tasks. In the next part of the digital domain, we study circuit-level implementations. We design and simulate an integrated teleportation and readout circuit on a single PC chip. The readout part of our device can not only be used on its own but can also be integrated with other compatible optical circuits to achieve atomic state detection. Further improvement of the device in terms of compactness and robustness is possible by integrating with sources and detectors in the optical regime. In the analog domain, we consider a quantum simulation problem. We show that the Klein paradox for the Klein-Gordon equation of a spin-zero particle manifests exactly the same kind of wave propagation and negative refraction phenomenon as the scattering of a transverse-electric-polarized electromagnetic wave incident on a negative index medium. Using this peculiar feature of negative index materials, we show that real time control and processing of some quantum experiments related with Klein paradox can be achieved by an optoelectronic simulator designed according to certain transformations and approximations.

Guney, Durdu

467

Optimized fast handover scheme in Mobile IPv6 networks to support mobile users for cloud computing  

Microsoft Academic Search

In the future cloud computing, users will heavily use mobile devices. Mobile networks for cloud computing should be managed\\u000a efficiently as well as support seamless services to mobile users regardless of their locations and movements. Hence, in mobile\\u000a networks for cloud computing, it is important to support seamless mobility management to mobile users who request real-time\\u000a services such as VoIP,

Seonggeun Ryu; Kyunghye Lee; Youngsong Mun

468

Theoretical Computer Science special issue on Complex Networks  

Microsoft Academic Search

Notice that the above networks are very di erent in nature. Some are sub-mitted to physical constraints (e. g., the internet or the brain) while others are purely virtual (e. g., social friendship networks); some come from natural sciences (e. g., biological networks) and others arise from technology (e. g., the internet); some are explicitly optimized with a notion of

Ravi Kumar; Matthieu Latapy

469

The Global Computer Network: Indications of Its Use Worldwide.  

ERIC Educational Resources Information Center

Discusses the use of global computerized information networks through statistics and examples of the involvement of various countries. Topics addressed include growth of the global network; countries that lack any connections; the value of information; librarians and the network; and exploring the Internet, including gopher sites. (Contains 29…

Brown, Jeanne M.

1994-01-01

470

Secure cloud computing with brokered trusted sensor networks  

Microsoft Academic Search

We propose a model for large-scale smartphone based sensor networks, with sensor information processed by clouds and grids, with a mediation layer for processing, filtering and other mashups done via a brokering network. Final aggregate results are assumed to be sent to users through traditional cloud interfaces such as browsers. We conjecture that such a network configuration will have significant

Apu Kapadia; Steven Myers; XiaoFeng Wang; Geoffrey Fox

2010-01-01

471

Computational models reduce complexity and accelerate insight into cardiac signaling networks  

PubMed Central

Cardiac signaling networks exhibit considerable complexity in size and connectivity. The intrinsic complexity of these networks complicates the interpretation of experimental findings and motivates new methods for investigating the mechanisms regulating cardiac signaling networks and the consequences these networks have on cardiac physiology and disease. Next-generation experimental techniques are also generating a wealth of genomic and proteomic data which can be difficult to analyze or interpret. Computational models are poised to play a key role in addressing these challenges. Computational models have a long history in contributing to the understanding of cardiac physiology and are useful for identifying biological mechanisms, inferring multi-scale consequences to cell signaling activities and reducing the complexity of large data sets. Models also integrate well with experimental studies to explain experimental observations and generate new hypotheses. Here, we review the contributions computational modeling approaches have made to the analysis of cardiac signaling networks and forecast opportunities for computational models to accelerate cardiac signaling research.

Yang, Jason H.; Saucerman, Jeffrey J.

2010-01-01

472

Computational Chemistry in the First Organic Chemistry Course: Applications in an Active Learning Situation  

Microsoft Academic Search

This paper offers a possible solution to the Feynman effect by combining the formative, summative, and supplemental features in first year organic chemistry. The maximum effect of this method occurs with the inclusion of meta tasks to aid interpreting the meaning of what organic chemistry should lead one to do when problem-solving. The effect of including computer exercises within a

Dana L. Delaware; K. R. Fountain

1996-01-01

473

An Evaluation of Computer-Aided Instruction in an Introductory Biostatistics Course.  

ERIC Educational Resources Information Center

Evaluates the effectiveness of computer assisted instruction for teaching biostatistics to first year students at the UCLA School of Dentistry. Results do not demonstrate the superiority of CAI but do suggest that CAI compares favorably to conventional lecture and programed instruction methods. (RAO)

Forsythe, Alan B.; Freed, James R.

1979-01-01

474

Computer Security in the Introductory Business Information Systems Course: An Exploratory Study of Textbook Coverage  

ERIC Educational Resources Information Center

The authors conducted an evaluation of Management Information Systems (MIS) textbooks and found that computer security receives very little in-depth coverage. The textbooks provide, at best, superficial treatment of security issues. The research results suggest that MIS faculty need to provide material to supplement the textbook to provide…

Sousa, Kenneth J.; MacDonald, Laurie E.; Fougere, Kenneth T.

2005-01-01

475

Computer-Assisted Techniques to Enhance Transformative Learning in First-Year Literature Courses.  

ERIC Educational Resources Information Center

Illustrates techniques to foster transformative learning in computer-assisted literature classes: (1) a lesson plan on John Donne's "A Valediction: Forbidding Mourning"; (2) a plan to analyze "Oedipus Rex" using the "Daedalus" Interactive Writing Environment; and (3) a demonstration of how students engage in "meta-reflection" as they explore…

Jamieson, Marguerite; Kajs, Rebecca; Agee, Anne

1996-01-01

476

Pattern of Non-Task Interactions in Asynchronous Computer-Supported Collaborative Learning Courses  

ERIC Educational Resources Information Center

Despite the importance of the non-task interactions in computer-supported collaborative learning (CSCL) environments as emphasized in the literature, few studies have investigated online behavior of people in the CSCL environments. This paper studies the pattern of non-task interactions among postgraduate students in an Australian university. The…

Abedin, Babak; Daneshgar, Farhad; D'Ambra, John

2014-01-01

477

Evaluation of Computer-Aided Instruction in a Gross Anatomy Course: A Six-Year Study  

ERIC Educational Resources Information Center

Web-based computer-aided instruction (CAI) has become increasingly important to medical curricula. This multi-year study investigated the effectiveness of CAI and the factors affecting level of individual use. Three CAI were tested that differed in specificity of applicability to the curriculum and in the level of student interaction with the CAI.…

McNulty, John A.; Sonntag, Beth; Sinacore, James M.

2009-01-01

478

Student Attrition in a Computer-Managed Course and Cognitive Attributes. Summary.  

ERIC Educational Resources Information Center

The incorporation of computer-managed instruction into an academic program made it necessary to identify those cognitive styles, abilities, and aptitudes which were relevant to the success or failure of trainees in the Navy's Basic Electricity and Electronics (BE/E) School in order to minimize the attrition rate. Measures of 6 styles, 6 abilities,…

Federico, Pat-Anthony; Landis, David B.

479

Mobile cloud computing service based on heterogeneous wireless and mobile P2P networks  

Microsoft Academic Search

In this paper, an investigation toward mobile P2P architecture brings a new insight to realize future mobile cloud computing systems. Although mobile devices capacity in storing data and running computational process is very limited, the main problem for implementing mobile cloud computing environment is still motivated by the classic issue of information proper- ties query process. Heterogeneous wireless networks (HWNs)

Yanuarius Teofilus Larosa; Jiann-Liang Chen; Der-Jiunn Deng; Han-Chieh Chao

2011-01-01

480

Research of trust model in P2P network based on trusted computing  

NASA Astrophysics Data System (ADS)

In order to strengthen the security of P2P networks, it is necessary to build trust relationships between nodes of networks. However, the traditional trust evaluation models can't resist the attacks of Pseudospoofing and Pseudostheft effectively. To resolve the problems, in this paper, the trusted computing method is introduced into P2P networks, and an idea of group trust model based on trusted computing methods is proposed. In the process of trust evaluation, the model can realize the anonymous attestation of the node body, which improves the creditability of trust relationships between nodes and resolves the security problems of P2P networks.

Li, Rong; Li, Lei

2013-03-01

481

Efficient computation of aerodynamic influence coefficients for aeroelastic analysis on a transputer network  

NASA Technical Reports Server (NTRS)

Aeroelastic analysis is multi-disciplinary and computationally expensive. Hence, it can greatly benefit from parallel processing. As part of an effort to develop an aeroelastic capability on a distributed memory transputer network, a parallel algorithm for the computation of aerodynamic influence coefficients is implemented on a network of 32 transputers. The aerodynamic influence coefficients are calculated using a 3-D unsteady aerodynamic model and a parallel discretization. Efficiencies up to 85 percent were demonstrated using 32 processors. The effect of subtask ordering, problem size, and network topology are presented. A comparison to results on a shared memory computer indicates that higher speedup is achieved on the distributed memory system.

Janetzke, David C.; Murthy, Durbha V.

1991-01-01

482

Effect of anti-virus software on infectious nodes in computer network: A mathematical model  

NASA Astrophysics Data System (ADS)

An e-epidemic model of malicious codes in the computer network through vertical transmission is formulated. We have observed that if the basic reproduction number is less than unity, the infected proportion of computer nodes disappear and malicious codes die out and also the malicious codes-free equilibrium is globally asymptotically stable which leads to its eradication. Effect of anti-virus software on the removal of the malicious codes from the computer network is critically analyzed. Analysis and simulation results show some managerial insights that are helpful for the practice of anti-virus in information sharing networks.

Mishra, Bimal Kumar; Pandey, Samir Kumar

2012-07-01

483

Pattern of non-task interactions in asynchronous computer-supported collaborative learning courses  

Microsoft Academic Search

Despite the importance of the non-task interactions in computer-supported collaborative learning (CSCL) environments as emphasized in the literature, few studies have investigated online behavior of people in the CSCL environments. This paper studies the pattern of non-task interactions among postgraduate students in an Australian university. The CSCL environment in this study includes separate online spaces called the Seminar Room and

Babak Abedin; Farhad Daneshgar; John DAmbra

2012-01-01

484

Creation of a Course in Computer Methods and Modeling for Undergraduate Earth Science Programs  

Microsoft Academic Search

In recent years computer modeling has gained importance in geological research as a means to generate and test hypotheses and to allow simulation of processes in places inaccessible to humans (e.g., outer core fluid dynamics), too slow to permit observation (e.g., erosionally-induced uplift of topography), or too large to facilitate construction of physical models (e.g., faulting on the San Andreas).

K. M. Menking; J. M. Dashnaw

2003-01-01

485

Reviews of computing technology: Securing network applications, Kerberos and RSA  

SciTech Connect

This paper will focus on the first step in establishing network security, authentication, and describe the basic function of both RSA and Kerberos as used to provide authentication and confidential data transfer services. It will also discuss the Digital Signature Standard and the market acceptance of each. Proper identification of the principals involved in a network dialog is a necessary first step in providing network-wide security comparable to that of stand-alone systems.

Johnson, S.M.

1992-06-01

486

Interactive computer-graphics network monitor for a tactical communications network. Master's thesis  

Microsoft Academic Search

In order to apply modern networking technology, either circuit- or packet-switched, to tactical communications networks, network designers must develop (1) robust link-level protocols to handle broadcast media and node mobility, and (2) distributed, adaptive routing protocols to handle the rapid reconfigurations required by node mobility and mortality. In addition, from the network manager's point of view, combat imposes electronic order

1987-01-01

487

TTN: A High Performance Hierarchical Interconnection Network for Massively Parallel Computers  

NASA Astrophysics Data System (ADS)

Interconnection networks play a crucial role in the performance of massively parallel computers. Hierarchical interconnection networks provide high performance at low cost by exploring the locality that exists in the communication patterns of massively parallel computers. A Tori connected Torus Network (TTN) is a 2D-torus network of multiple basic modules, in which the basic modules are 2D-torus networks that are hierarchically interconnected for higher-level networks. This paper addresses the architectural details of the TTN and explores aspects such as node degree, network diameter, cost, average distance, arc connectivity, bisection width, and wiring complexity. We also present a deadlock-free routing algorithm for the TTN using four virtual channels and evaluate the network's dynamic communication performance using the proposed routing algorithm under uniform and various non-uniform traffic patterns. We evaluate the dynamic communication performance of TTN, TESH, MH3DT, mesh, and torus networks by computer simulation. It is shown that the TTN possesses several attractive features, including constant node degree, small diameter, low cost, small average distance, moderate (neither too low, nor too high) bisection width, and high throughput and very low zero load latency, which provide better dynamic communication performance than that of other conventional and hierarchical networks.

Rahman, M. M. Hafizur; Inoguchi, Yasushi; Sato, Yukinori; Horiguchi, Susumu

488

Optical binary de Bruijn networks for massively parallel computing: design methodology and feasibility study  

NASA Astrophysics Data System (ADS)

The interconnection network structure can be the deciding and limiting factor in the cost and the performance of parallel computers. One of the most popular point-to-point interconnection networks for parallel computers today is the hypercube. The regularity, logarithmic diameter, symmetry, high connectivity, fault tolerance, simple routing, and reconfigurability (easy embedding of other network topologies) of the hypercube make it a very attractive choice for parallel computers. Unfortunately the hypercube possesses a major drawback, which is the links per node increases as the network grows in size. As an alternative to the hypercube, the binary de Bruijn (BdB) network has recently received much attention. The BdB not only provides a logarithmic diameter, fault tolerance, and simple routing but also requires fewer links than the hypercube for the same network size. Additionally, a major advantage of the BdB edges per node is independent of the network size. This makes it very desirable for large-scale parallel systems. However, because of its asymmetrical nature and global connectivity, it poses a major challenge for VLSI technology. Optics, owing to its three-dimensional and global-connectivity nature, seems to be very suitable for implementing BdB networks. We present an implementation methodology for optical BdB networks. The distinctive feature of the proposed implementation methodology is partitionability of the network into a few primitive operations that can be implemented efficiently. We further show feasibility of the

Louri, Ahmed; Sung, Hongki

1995-10-01

489

Enhancing Human Computer Interaction in Networked Hapto-Acoustic Virtual Reality Environments on the CeNTIE Network  

Microsoft Academic Search

\\u000a We discuss some recent advances made to our Virtual Reality system which includes touch feedback in a networked environment.\\u000a Some issues which affect the realisation and implementation of the Hapto-Acoustic Virtual Reality Environment and human-computer\\u000a interaction (HCI) are mentioned, as well as networking issues. Our system is called a “haptic workbench” which combines 3D\\u000a graphics visualisation, touch (haptics) and audio

Tony Adriaansen; Alex Krumm-heller; Chris Gunn

2004-01-01

490

Investigating patterns of interaction in networked learning and computer-supported collaborative learning: A role for Social Network Analysis  

Microsoft Academic Search

The focus of this study is to explore the advances that Social Network Analysis (SNA) can bring, in combination with other\\u000a methods, when studying Networked Learning\\/Computer-Supported Collaborative Learning (NL\\/CSCL). We present a general overview\\u000a of how SNA is applied in NL\\/CSCL research; we then go on to illustrate how this research method can be integrated with existing\\u000a studies on NL\\/CSCL,

Maarten De Laat; Vic Lally; Lasse Lipponen; Robert-Jan Simons

2007-01-01

491

Securing the mobile enterprise with network-based security and cloud computing  

Microsoft Academic Search

This paper proposes a new security architecture for the mobile enterprise which uses network-based security and cloud computing to both simplify and enhance the security of enterprises, and reinstate the currently disappearing security perimeter.

Gustavo de los Reyes; Sanjay Macwan; Deepak Chawla; Cristina Serban

2012-01-01

492

Multi-Vehicles, Wireless Testbed for Networked Control, Communications and Computing.  

National Technical Information Service (NTIS)

We have constructed a testbed consisting of 4 mobile vehicles (with 4 additional vehicles being completed), each with embedded computing and communications capability for use in testing new approaches for command and control across dynamic networks. The s...

R. Murray J. Doyle M. Effros J. Hickey S. Low

2002-01-01

493

Computing and Communications Infrastructure for Network-Centric Warfare: Exploiting COTS, Assuring Performance.  

National Technical Information Service (NTIS)

In network centric warfare (NCW), the effectiveness of warfighters and their platforms is enhanced by rapid and effective information flow. This requires a robust and flexible computing and communications software infrastructure, and a degree of system in...

J. P. Richardson L. Graba M. Agrawal

2004-01-01

494

Using Web-Based Technology to Teach a Computer Network Course  

Microsoft Academic Search

This paper looks at the techniques involve in implementing a web technology in teaching. There is a need to develop a multimedia teaching class these days since the technology is moving so fast toward new discovery everyday. This is the first phase of a research and development project to determine the effectiveness of the web-based teaching. As part of this

Hamid R. MAJLESEIN; Ahmet TAN

495

Learning nonlinear multiregression networks based on evolutionary computation.  

PubMed

This paper describes a novel knowledge discovery and data mining framework dealing with nonlinear interactions among domain attributes. Our network-based model provides an effective and efficient reasoning procedure to perform prediction and decision making. Unlike many existing paradigms based on linear models, the attribute relationship in our framework is represented by nonlinear nonnegative multiregressions based on the Choquet