These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Information communication on complex networks  

NASA Astrophysics Data System (ADS)

Since communication networks such as the Internet, which is regarded as a complex network, have recently become a huge scale and a lot of data pass through them, the improvement of packet routing strategies for transport is one of the most significant themes in the study of computer networks. It is especially important to find routing strategies which can bear as many traffic as possible without congestion in complex networks. First, using neural networks, we introduce a strategy for packet routing on complex networks, where path lengths and queue lengths in nodes are taken into account within a framework of statistical physics. Secondly, instead of using shortest paths, we propose efficient paths which avoid hubs, nodes with a great many degrees, on scale-free networks with a weight of each node. We improve the heuristic algorithm proposed by Danila et. al. which optimizes step by step routing properties on congestion by using the information of betweenness, the probability of paths passing through a node in all optimal paths which are defined according to a rule, and mitigates the congestion. We confirm the new heuristic algorithm which balances traffic on networks by achieving minimization of the maximum betweenness in much smaller number of iteration steps. Finally, We model virus spreading and data transfer on peer-to-peer (P2P) networks. Using mean-field approximation, we obtain an analytical formulation and emulate virus spreading on the network and compare the results with those of simulation. Moreover, we investigate the mitigation of information traffic congestion in the P2P networks.

Igarashi, Akito; Kawamoto, Hiroki; Maruyama, Takahiro; Morioka, Atsushi; Naganuma, Yuki

2013-02-01

2

COMMUNICATION NETWORKS AND THE RISE OF AN INFORMATION ELITE  

E-print Network

COMMUNICATION NETWORKS AND THE RISE OF AN INFORMATION ELITE CAN COMMUNICATION HELP THE INFORMATION shared. Thus universal access policies that provide only communication channels but do not also establish of communication channels and the levels of learning and sharing that take place, the model rigorously explains how

3

Analysis of informal communication networks - a case study  

E-print Network

The structure and dynamics of informal communication networks are of central importance for the functionality of enterprise workflows and for performance and innovation of knowledge-centric organizations. While most ...

Schoder, Detlef

4

Role of information and communication networks in malaria survival  

PubMed Central

Background Quite often symptoms of malaria go unrecognized or untreated. According to the Multilateral Initiative on Malaria, 70% of the malaria cases that are treated at home are mismanaged. Up to 82% of all malaria episodes in sub-Saharan Africa are treated outside the formal health sector. Fast and appropriate diagnosis and treatment of malaria is extremely important in reducing morbidity and mortality. Method Data from 70 different countries is pooled together to construct a panel dataset of health and socio-economic variables for a time span of (1960–2004). The generalized two-stage least squares and panel data models are used to investigate the impact of information and communication network (ICN) variables on malaria death probability. The intensity of ICN is represented by the number of telephone main lines per 1,000 people and the number of television sets per 1,000 people. Results The major finding is that the intensity of ICN is associated with reduced probability of deaths of people that are clinically identified as malaria infected. The results are robust for both indicators i.e. interpersonal and mass communication networks and for all model specifications examined. Conclusion The results suggest that information and communication networks can substantially scale up the effectiveness of the existing resources for malaria prevention. Resources spent in preventing malaria are far less than needed. Expanded information and communication networks will widen the avenues for community based "participatory development", that encourages the use of local information, knowledge and decision making. Timely information, immediate care and collective knowledge based treatment can be extremely important in reducing child mortality and achieving the millennium development goal. PMID:17927831

Mozumder, Pallab; Marathe, Achla

2007-01-01

5

Information\\/communication and dispatching strategies for networks with mobile servers  

Microsoft Academic Search

The dispatch problem for a network with a general number of nonstationary service units is discussed. The possibility of dispatching a service unit to a call for service while the unit is in motion depends on the quality of the information\\/communication system available. Three information\\/communication systems are investigated: two extreme cases in which only stationary units can be dispatched from

O. Berman; M. R. Rahnama

1990-01-01

6

Information communication  

E-print Network

Codes November 30, 2005 Erasure Channels 1 . In many practical communication systems, information, HDTV and in communication with Voyager, Gallileo and other space satellites. Luby Transform (LT) Codes

Roweis, Sam

7

Communicating Immunization Science: The Genesis and Evolution of the National Network for Immunization Information  

Microsoft Academic Search

For 10 years, the National Network for Immunization Information (NNii) has pursued its goal to “provide the public, health professionals, policy makers, and the media with up-to-date, scientifically valid information related to immunizations to help them understand the issues and to make informed decisions.” This investigation provides a critical evaluation of the strategic communication planning and implementation of NNii from

Christy J. W. Ledford; Kristen L. Willett; Gary L. Kreps

2012-01-01

8

ENERGY-AWARE SECURE MULTICAST COMMUNICATION IN AD-HOC NETWORKS USING GEOGRAPHIC LOCATION INFORMATION  

E-print Network

ENERGY-AWARE SECURE MULTICAST COMMUNICATION IN AD-HOC NETWORKS USING GEOGRAPHIC LOCATION INFORMATION Loukas Lazos, Radha Poovendran Network Security and Cryptography Laboratory University by NSF grant ANI-0093187 and ARO grant DAAD-190210242 ABSTRACT The problem of securing multicast

Lazos, Loukas

9

Information communication  

E-print Network

Codes November 22, 2006 Erasure Channels 1 . In many practical communication systems, information, HDTV and in communication with Voyager, Galileo and other space satellites. Luby Transform (LT) Codes 5

Roweis, Sam

10

Biomass Program Outreach and Communication The Bioenergy Feedstock Information Network (BFIN)  

E-print Network

+ Biomass Program Outreach and Communication The Bioenergy Feedstock Information Network (BFIN) About ten years ago ORNL launched BFIN providing a gateway to a wealth of biomass feedstock information by ORNL. Regional partnership workshops The Regional Biomass Energy Feedstock Partnership is comprised

11

Public versus Private Domain: Knowledge and Information in the Global Communications Network  

Microsoft Academic Search

It goes without saying that knowledge and information are the most valuable commodities in the new economy. Though knowledge\\u000a and information as private goods could provide great business opportunities for rights holders in the global communications\\u000a network, they exhibit the distinctive characteristics of public goods (Samuelson 1954, pp. 387–389; Stiglitz 1999, pp. 308–325).\\u000a Therefore, the commodification of knowledge and information

Laszlo Fekete

12

Sensor Networks Communication strategies  

E-print Network

Outline Sensor Networks Communication strategies Follow on Distributed estimation in sensor@dsi.unifi.it February 1, 2007 A. Benavoli Fully Decentralized Networks #12;Outline Sensor Networks Communication strategies Follow on Outline 1 Sensor Networks An introduction to Sensor Networks Network architectures

Chisci, Luigi

13

To construct a communications network over the whole of Hokkaido - Vitality from an information network : NF212 plan -  

NASA Astrophysics Data System (ADS)

Hokkaido finds itself confronted with certain problems-how to strengthen the constitution of its industrial structure and how to build up wealthy local communities without regional differences. We think that information-orientation is indispensable for this purpose. What we now see materializing is a government policy of establishing information-oriented communities, and information allied businesses promoted by private industrial firms. If, however, these high-tech start-up ventures are carried out without any cooperation with each other, it would be impossible to realize an effective communication network-with each individual venture, for example, probably selecting a different kind of terminal. The Hokkaido government has searched for what information-oriented society should be in Hokkaido along with the private industrial firms, and also to make things ready for an information communication system. That means finding a way to apply this plan to the whole of Hokkaido. The Hokkaido government calls this plan NF212.

Ishiko, Michimasu

14

Information & Communications  

E-print Network

ändert sich in Abhängigkeit von der Zeit und der Hirnaktivität (,,LTP, LTD".....) #5 ! ' #12;© Siemens AG IC 4, 2003 Information & Communications Neural Computation EmotionLong Term Memory Working Memory Attentional Filtering Object/Spatial Memory Rule Memory Attention Object-Based Attention, Spatial Attention

Popeea, Corneliu - Chair for Foundations of Software Reliability and Theoretical Computer Science

15

The Impact of Information and Communication Technologies on Inter-organisational Routines and Activities of Learning Networks  

Microsoft Academic Search

This paper uses the conceptual tools of technology-in-practice and the enacted structures to examine the impact of Information and Communication Technologies on the activities of learning networks, that is inter-firm networks specifically formed to enable their members to share and increase their knowledge. The basic assumption is that the measurement of the real impact of Information and Communication Technologies on

George Tsekouras; Despina Kanellou

16

Informing the network: Improving communication with interface communities during wildland fire  

USGS Publications Warehouse

An interagency research team studied fire communications that took place during different stages of two wildfires in southern California: one small fire of short duration and one large fire of long duration. This "quick- response" research showed that pre-fire communication planning was particularly effective for smaller fire events and parts of that planning proved invaluable for the large fire event as well. Information seeking by the affected public relied on locally convenient sources during the small fire. During the large fire, widespread evacuations disrupted many of the local informal communication networks. Residents' needs were for "real-time, " place-specific information: precise location, severity, size, and direction of spread of the fires. Fire management agencies must contribute real-time, place-specific fire information when it is most needed by the affected public, as they try to make sense out of the chaos of a wildland fire. Disseminating fire information as broadly as possible through multiple pathways will maximize the probability of the public finding the information they need. ?? Society for Human Ecology.

Taylor, J. G.; Gillette, S. C.; Hodgson, R. W.; Downing, J. L.; Burns, M. R.; Chavez, D. J.; Hogan, J. T.

2007-01-01

17

Computer Communication Networks and Their Use for Information Retrieval and Dissemination: Basic Tutorial and Current Scenario of Networks in India.  

ERIC Educational Resources Information Center

Offers a tutorial on telecommunications that covers the basic concepts, types, techniques, and protocols of data communications. Current scenarios for computer communications networks, their connectivity to global telecommunication environments, and global online retrieval services are discussed. Ten data communication networks and seven online…

Arora, Jagdish; And Others

1992-01-01

18

Communicating immunization science: the genesis and evolution of the National Network for Immunization Information.  

PubMed

For 10 years, the National Network for Immunization Information (NNii) has pursued its goal to "provide the public, health professionals, policy makers, and the media with up-to-date, scientifically valid information related to immunizations to help them understand the issues and to make informed decisions." This investigation provides a critical evaluation of the strategic communication planning and implementation of NNii from conception to present day. The study uses a case study methodology, developing a systematic analysis of organizational documents, the media environment, and in-depth interviews by applying Weick's model of organizing as an interpretive framework. Iterative data analysis included open coding, axial coding, and thematic saturation. Themes were compared with phases of strategic communication and present study propositions. Major themes identified included the organization's informative nature, funding credibility, nonbranding, reflective evaluation, collaborative partnerships, and media strategy. NNii meets the requirements of requisite variety, nonsummativity, and organizational flexibility proposed by Weick's model of organizing. However, a lack of systematic evaluation of organization goals prevents it from adapting communication tactics and strategies. In addition, the authors recommend that NNii, while maintaining its informative nature, adopt persuasive strategies to attract and retain the attention of its target audiences. PMID:22026482

Ledford, Christy J W; Willett, Kristen L; Kreps, Gary L

2012-01-01

19

Information and Communication Technology  

NSDL National Science Digital Library

Communication is a central aspect of all our lives. Today, our modes of communication are highly dependent on technologies such as the internet, wireless networks, phones, and computers. This issue of Topic in Depth explores the ways these forms of communication are part of our lives and highlights some new directions in communication technology.WordIQ Dictionary and Encyclopedia (1) offers this definition: "Communication is the process of exchanging information usually via a common system of symbols." The website explains some of the key process involved in communication and describes different forms of communication, such as animal communication, interpersonal communication, and computer-mediated communication. Also taking a broad view on communication, this world history website (2) provides some background on the mathematical theories that are used in designing telecommunications systems. The articles highlighted on this website from the Center for the Study of Technology and Society (4) attest to the far reaching influence of communication technology. As research on the MediaLab Europe website suggests (5), we have moved into not just developing technology that mediates interpersonal communication (such as phones) but also creating "intimate and personal connections with and through new technologies." This NSF website (6) also highlights some recent discoveries in Computer Information Science and Engineering. Finally, this article from First Monday (7) discusses the far-reaching effects these new developments in technology and globalization are having on language and learning.

20

Resourcesharing computer communications networks  

Microsoft Academic Search

The development of resource-sharing networks can facilitate the provision of a wide range of economic and reliable computer services. Computer-communication networks allow the sharing of specialized computer resources such as data bases, programs, and hardware. Such a network consists of both the computer resources and a communications system interconnecting them and allowing their full utilization to be achieved. In addition,

ROBERT E. KAHN

1972-01-01

21

A universal quantum information processor for scalable quantum communication and networks  

PubMed Central

Entanglement provides an essential resource for quantum computation, quantum communication, and quantum networks. How to conveniently and efficiently realize the generation, distribution, storage, retrieval, and control of multipartite entanglement is the basic requirement for realistic quantum information processing. Here, we present a theoretical proposal to efficiently and conveniently achieve a universal quantum information processor (QIP) via atomic coherence in an atomic ensemble. The atomic coherence, produced through electromagnetically induced transparency (EIT) in the ?-type configuration, acts as the QIP and has full functions of quantum beam splitter, quantum frequency converter, quantum entangler, and quantum repeater. By employing EIT-based nondegenerate four-wave mixing processes, the generation, exchange, distribution, and manipulation of light-light, atom-light, and atom-atom multipartite entanglement can be efficiently and flexibly achieved in a deterministic way with only coherent light fields. This method greatly facilitates the operations in quantum information processing, and holds promising applications in realistic scalable quantum communication and quantum networks. PMID:25316514

Yang, Xihua; Xue, Bolin; Zhang, Junxiang; Zhu, Shiyao

2014-01-01

22

A universal quantum information processor for scalable quantum communication and networks.  

PubMed

Entanglement provides an essential resource for quantum computation, quantum communication, and quantum networks. How to conveniently and efficiently realize the generation, distribution, storage, retrieval, and control of multipartite entanglement is the basic requirement for realistic quantum information processing. Here, we present a theoretical proposal to efficiently and conveniently achieve a universal quantum information processor (QIP) via atomic coherence in an atomic ensemble. The atomic coherence, produced through electromagnetically induced transparency (EIT) in the ?-type configuration, acts as the QIP and has full functions of quantum beam splitter, quantum frequency converter, quantum entangler, and quantum repeater. By employing EIT-based nondegenerate four-wave mixing processes, the generation, exchange, distribution, and manipulation of light-light, atom-light, and atom-atom multipartite entanglement can be efficiently and flexibly achieved in a deterministic way with only coherent light fields. This method greatly facilitates the operations in quantum information processing, and holds promising applications in realistic scalable quantum communication and quantum networks. PMID:25316514

Yang, Xihua; Xue, Bolin; Zhang, Junxiang; Zhu, Shiyao

2014-01-01

23

Communication network survivability  

NASA Astrophysics Data System (ADS)

A communication network is composed of communication links and processing nodes. The effective design of a survivable communication network requires a means of determining the structural connectivity of the network both as a whole and with respect to individual resources: links and nodes. In this thesis we represent the connectivity evaluation from two perspectives. The first pertains to considerations applicable to the design schema of the network, and the second deals with an improvement of connectivity in an existing network. We then present and analyze a practical synthetic approach to a communications network's survivability profile by using the example of SACS (the Saudi Arabian Communication System). Finally, we evaluate the difference between the theoretical and practical approaches to survivability.

Soliman, Al-Amro

1991-03-01

24

Network information flow  

Microsoft Academic Search

We introduce a new class of problems called network information flow which is inspired by computer network applica- tions. Consider a point-to-point communication network on which a number of information sources are to be mulitcast to certain sets of destinations. We assume that the information sources are mu- tually independent. The problem is to characterize the admissible coding rate region.

Rudolf Ahlswede; Ning Cai; Shuo-yen Robert Li; Raymond W. Yeung

2000-01-01

25

Extracting information from informal communication  

E-print Network

This thesis focuses on the problem of extracting information from informal communication. Textual informal communication, such as e-mail, bulletin boards and blogs, has become a vast information resource. However, such ...

Rennie, Jason D. M. (Jason Daniel Malyutin), 1976-

2007-01-01

26

Architecting space communication networks  

E-print Network

Reliable communication and navigation services are critical to robotic and human space missions. NASA currently provides them through three independent and uncoordinated network that consist of both Earth-based and space-based ...

Sanchez Net, Marc

2014-01-01

27

Out of sight but not out of mind?: Informal networks, communication and media use in global software teams  

Microsoft Academic Search

In an effort to reduce costs and improve staffing options, companies are going offshore to staff software projects. Although advances in communication technologies make it easier to share information, a growing number of studies have highlighted the disadvantages and hidden costs of distributed teams. This paper reports the results of a study that used social network analysis to study the

Klarissa T. Chang; Kate Ehrlich

2007-01-01

28

INFORMATION & COMMUNICATION  

E-print Network

.00/£23.95 · 978-0-262-01813-5 VENTURE LABOR Work and the Burden of Risk in Innovative Industries Gina Neff Why series GOOD FAITH COLLABORATION The Culture of Wikipedia Joseph Michael Reagle Jr. Foreword by Lawrence Network SURVEILLANCE OR SECURITY? The Risks Posed by New Wiretapping Technologies Susan Landau 2012 · 400

Jackson, Daniel

29

Natural communication with information systems  

Microsoft Academic Search

Pervasive networking and sophisticated computing open opportunities for collaborative information processing independent of time and space. In this instance the information system becomes an enhancer of human intellect, as well as a mediator for communication among participants. The human user favors the sensory dimensions of sight, sound, and touch as primary channels of communication. Machines that can accommodate these modes

IVAN MARSIC; ATTILA MEDL; JAMES FLANAGAN

2000-01-01

30

College of Communication and Information COM Communication  

E-print Network

.Itisalsodesignedtoimprovecommunicationskillswithandamong physicians, nurses, and allied health professionals. COM 312 LEARNING INTERCULTURAL COMMUNICATION THROUGHCollege of Communication and Information COM Communication KEY: # = new course * = course changed TO COMMUNICATIONS. (3) Anintroductiontotheprocessofcommunicationasacriticalelementinhumaninteractionandinsociety

MacAdam, Keith

31

Energy-aware secure multicast communication in ad-hoc networks using geographic location information  

Microsoft Academic Search

The problem of securing multicast communications in an energy-constrained ad-hoc network requires the efficient management of cryptographic quantities. We show that existing efficient key distribution techniques for wired networks that rely on logical hierarchies are extremely energy inefficient. We also show that the consideration of the physical location of the members is critical for developing energy-efficient key distribution schemes. By

Loukas Lazos; Radha Poovendran

2003-01-01

32

Hyperswitch Communication Network Computer  

NASA Technical Reports Server (NTRS)

Hyperswitch Communications Network (HCN) computer is prototype multiple-processor computer being developed. Incorporates improved version of hyperswitch communication network described in "Hyperswitch Network For Hypercube Computer" (NPO-16905). Designed to support high-level software and expansion of itself. HCN computer is message-passing, multiple-instruction/multiple-data computer offering significant advantages over older single-processor and bus-based multiple-processor computers, with respect to price/performance ratio, reliability, availability, and manufacturing. Design of HCN operating-system software provides flexible computing environment accommodating both parallel and distributed processing. Also achieves balance among following competing factors; performance in processing and communications, ease of use, and tolerance of (and recovery from) faults.

Peterson, John C.; Chow, Edward T.; Priel, Moshe; Upchurch, Edwin T.

1993-01-01

33

Terminal-oriented computer-communication networks.  

NASA Technical Reports Server (NTRS)

Four examples of currently operating computer-communication networks are described in this tutorial paper. They include the TYMNET network, the GE Information Services network, the NASDAQ over-the-counter stock-quotation system, and the Computer Sciences Infonet. These networks all use programmable concentrators for combining a multiplicity of terminals. Included in the discussion for each network is a description of the overall network structure, the handling and transmission of messages, communication requirements, routing and reliability consideration where applicable, operating data and design specifications where available, and unique design features in the area of computer communications.

Schwartz, M.; Boorstyn, R. R.; Pickholtz, R. L.

1972-01-01

34

COMMUNICATION, INFORMATION AND  

E-print Network

419 SCHOOL OF COMMUNICATION, INFORMATION AND LIBRARY STUDIES (SCILS) General Information 420:189:101 Introduction to Communication and Information Systems and Processes 04:189:102 Introduction to Media Systems and Processes 04:189:103 Information Technology and Informatics Applicants to the communication major must

Garfunkel, Eric

35

Simulator of Space Communication Networks  

NASA Technical Reports Server (NTRS)

Multimission Advanced Communications Hybrid Environment for Test and Evaluation (MACHETE) is a suite of software tools that simulates the behaviors of communication networks to be used in space exploration, and predict the performance of established and emerging space communication protocols and services. MACHETE consists of four general software systems: (1) a system for kinematic modeling of planetary and spacecraft motions; (2) a system for characterizing the engineering impact on the bandwidth and reliability of deep-space and in-situ communication links; (3) a system for generating traffic loads and modeling of protocol behaviors and state machines; and (4) a system of user-interface for performance metric visualizations. The kinematic-modeling system makes it possible to characterize space link connectivity effects, including occultations and signal losses arising from dynamic slant-range changes and antenna radiation patterns. The link-engineering system also accounts for antenna radiation patterns and other phenomena, including modulations, data rates, coding, noise, and multipath fading. The protocol system utilizes information from the kinematic-modeling and link-engineering systems to simulate operational scenarios of space missions and evaluate overall network performance. In addition, a Communications Effect Server (CES) interface for MACHETE has been developed to facilitate hybrid simulation of space communication networks with actual flight/ground software/hardware embedded in the overall system.

Clare, Loren; Jennings, Esther; Gao, Jay; Segui, John; Kwong, Winston

2005-01-01

36

Timely redistribution of information for epidemiological surveillance and alert: the experience from the French communicable diseases network.  

PubMed Central

Since 1984 the French Communicable Disease Network (FCDN) collects and analyses epidemiological information obtained online from a team of "Sentinel General Practitioners" (SGPs). It redistributes this information in the form of standardised weekly incidence estimates. These weekly estimates now appear on the Internet and are the basis for issuing alerts of influenza epidemics. We postulate that day to day estimations would be highly desirable to achieve timely detection of the actual onset of the epidemic, a need dramatically underscored by the emergence of bioterrorism. The present paper suggests the feasibility of reconstructing daily epidemiological information using local smoothing with a suitable spline function to obtain short latency alert messages. PMID:12463941

Valleron, Alain-Jacques; Vidal, Jaques J.

2002-01-01

37

Modeling the socially intelligent communication of health information to a patient's personal social network  

Microsoft Academic Search

This study examined how emotional proximity and gender affect people's information requirements when someone that they know is chronically or critically ill. In an online study, participants were asked what information they would want to receive about members of their social network in three categories: someone who was very close, someone who was not so close, and someone who was

Wendy Moncur; Ehud Reiter; Judith Masthoff; Alex Carmichael

2010-01-01

38

Social network analysis and dual rover communications  

NASA Astrophysics Data System (ADS)

Social network analysis (SNA) refers to the collection of techniques, tools, and methods used in sociometry aiming at the analysis of social networks to investigate decision making, group communication, and the distribution of information. Human factors engineers at the National Aeronautics and Space Administration (NASA) conducted a social network analysis on communication data collected during a 14-day field study operating a dual rover exploration mission to better understand the relationships between certain network groups such as ground control, flight teams, and planetary science. The analysis identified two communication network structures for the continuous communication and Twice-a-Day Communication scenarios as a split network and negotiated network respectfully. The major nodes or groups for the networks' architecture, transmittal status, and information were identified using graphical network mapping, quantitative analysis of subjective impressions, and quantified statistical analysis using Sociometric Statue and Centrality. Post-questionnaire analysis along with interviews revealed advantages and disadvantages of each network structure with team members identifying the need for a more stable continuous communication network, improved robustness of voice loops, and better systems training/capabilities for scientific imagery data and operational data during Twice-a-Day Communications.

Litaker, Harry L.; Howard, Robert L.

2013-10-01

39

Quantum network communication -- the butterfly and beyond  

E-print Network

We study the k-pair communication problem for quantum information in networks of quantum channels. We consider the asymptotic rates of high fidelity quantum communication between specific sender-receiver pairs. Four scenarios of classical communication assistance (none, forward, backward, and two-way) are considered. (i) We obtain outer and inner bounds of the achievable rate regions in the most general directed networks. (ii) For two particular networks (including the butterfly network) routing is proved optimal, and the free assisting classical communication can at best be used to modify the directions of quantum channels in the network. Consequently, the achievable rate regions are given by counting edge avoiding paths, and precise achievable rate regions in all four assisting scenarios can be obtained. (iii) Optimality of routing can also be proved in classes of networks. The first class consists of directed unassisted networks in which (1) the receivers are information sinks, (2) the maximum distance from senders to receivers is small, and (3) a certain type of 4-cycles are absent, but without further constraints (such as on the number of communicating and intermediate parties). The second class consists of arbitrary backward-assisted networks with 2 sender-receiver pairs. (iv) Beyond the k-pair communication problem, observations are made on quantum multicasting and a static version of network communication related to the entanglement of assistance.

Debbie Leung; Jonathan Oppenheim; Andreas Winter

2006-08-29

40

The Physics of Communicability in Complex Networks  

E-print Network

A fundamental problem in the study of complex networks is to provide quantitative measures of correlation and information flow between different parts of a system. To this end, several notions of communicability have been introduced and applied to a wide variety of real-world networks in recent years. Several such communicability functions are reviewed in this paper. It is emphasized that communication and correlation in networks can take place through many more routes than the shortest paths, a fact that may not have been sufficiently appreciated in previously proposed correlation measures. In contrast to these, the communicability measures reviewed in this paper are defined by taking into account all possible routes between two nodes, assigning smaller weights to longer ones. This point of view naturally leads to the definition of communicability in terms of matrix functions, such as the exponential, resolvent, and hyperbolic functions, in which the matrix argument is either the adjacency matrix or the graph Laplacian associated with the network. Considerable insight on communicability can be gained by modeling a network as a system of oscillators and deriving physical interpretations, both classical and quantum-mechanical, of various communicability functions. Applications of communicability measures to the analysis of complex systems are illustrated on a variety of biological, physical and social networks. The last part of the paper is devoted to a review of the notion of locality in complex networks and to computational aspects that by exploiting sparsity can greatly reduce the computational efforts for the calculation of communicability functions for large networks.

Ernesto Estrada; Naomichi Hatano; Michele Benzi

2011-09-13

41

Communication Algorithms for Wireless Ad Hoc Networks  

E-print Network

time maintain local neighborhood information. In the last part of this dissertation we look at the distributed trigger counting problem in the wireless ad hoc network setting. We present a deterministic algorithm for this problem which is communication...

Viqar, Saira

2012-10-19

42

The social network and the geo-hydrological information: the CNR IRPI Facebook page as example of communication.  

NASA Astrophysics Data System (ADS)

Good communication is a fundamental step for the spread of news and knowledge. The effectiveness and persuasiveness of a message is a function of the interaction of characteristics of the audience, the source of the message, and content of the message. Italian Research Institute for the Hydrogeological Protection (CNR-IRPI) has been publishing information on geo-hydrological events using the Internet (http://sici.irpi.cnr.it/, http://webmap.irpi.cnr.it/, http://geomorphology.irpi.cnr.it/, http://polaris.irpi.cnr.it/, http://giida.irpi.cnr.it/, http://events.irpi.cnr.it/ ). Our websites are mainly visited by experts and the information are used for technical purposes. The contents and the interface of the websites are designed for this type of users. Our intention is to increase the type of users, and we are testing the use of social network to catch the wide public's attention. Social networks have emerged as critical factor in information dissemination, search, marketing expertise and influence discovery, and are an important channel for people to share information. Social scientist have long recognized the importance of social networks in the spread of information. Facebook and Twitter are the most widely used social networking services. They make it simpler to communicate with multiple people at one time. Social media may also make it easier for users to monitor activities of people (friends or followers). An official Facebook page of the Italian Research Institute for the Hydrogeological Protection (CNR-IRPI, https://www.facebook.com/CNR.IRPI ), was created and linked to a Twitter account. The purpose of this page is to disseminate information on flood and landslide events and on our research activities, in order to raise awareness of geo-hydrological matters among users. This page publishes news on current or historical landslide and flood events involving the Italian territory, or news from around the world collected on the network. The news are published as text or links to videos or photos collected from the network. Facebook provides statistics regarding access the page and the interactions that users have with the news published. These statistics make it possible to quantify the interest of the users to the content of the news (post events, new publication institute, etc.). The way the news are published (only in text mode, with photographic or video images), the novelty (current event or historical) and the location (events in Italy or abroad) are all messages characteristic's that increase the audience attention. This work has highlighted the significance of the characteristics that can draw the attention of the public regarding landslide and flood information.

Fiorucci, Federica; Bianchi, Cinzia; Marchesini, Ivan; Salvati, Paola; Fugnoli, Federico; Guzzetti, Fausto

2014-05-01

43

NASA technology transfer network communications and information system: TUNS user survey  

NASA Technical Reports Server (NTRS)

Applied Expertise surveyed the users of the deployed Technology Utilization Network System (TUNS) and surveyed prospective new users in order to gather background information for developing the Concept Document of the system that will upgrade and replace TUNS. Survey participants broadly agree that automated mechanisms for acquiring, managing, and disseminating new technology and spinoff benefits information can and should play an important role in meeting NASA technology utilization goals. However, TUNS does not meet this need for most users. The survey describes a number of systematic improvements that will make it easier to use the technology transfer mechanism, and thus expedite the collection and dissemination of technology information. The survey identified 26 suggestions for enhancing the technology transfer system and related processes.

1992-01-01

44

Acoustic energy conversion for mobile nanosensor network communication  

Microsoft Academic Search

Communication is fundamental capability of nanosesnor in medical and nanomedicine application. Communication by acoustic wave is most useful in nanosesnor mobile network. Acoustic communication between nanosensors in the mobile network has been favorable potential utilization in nanonmedicine, especially in health care, drug delivery and information processing. In this paper, we present the acoustic energy conversion between nanosensor communications that can

Mohammadjavad Abbasi Abandankeshi; Muhammad Shafie Abd Latiff

2011-01-01

45

Switch for serial or parallel communication networks  

DOEpatents

A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination. 9 figs.

Crosette, D.B.

1994-07-19

46

Switch for serial or parallel communication networks  

DOEpatents

A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination.

Crosette, Dario B. (DeSoto, TX)

1994-01-01

47

3rd KICS International Conference on Information and Communications  

E-print Network

and their papers will be recommended to be published on the Journal of KICS. General information : Contact by e3rd KICS International Conference on Information and Communications 3rd KICS International Communications Communication Software Network Security Optical Communications Communication Theory & Systems

Toh, C-K.

48

HIGH PERFORMANCE INTEGRATED NETWORK COMMUNICATIONS ARCHITECTURE -(INCA)  

E-print Network

HIGH PERFORMANCE INTEGRATED NETWORK COMMUNICATIONS ARCHITECTURE - (INCA) Klaus Schug1 , Anura communications architecture (INCA) is presented that is interoperable with all existing programs, computers and networks, and scales with network and CPU speeds. The INCA architecture minimizes internal system

Jayasumana, Anura P.

49

Covert Communication Networks  

E-print Network

sites, or chat with acquaintances do so assuming that their communications will never be observed by anyone other than their intended recipient. For most people, a sense of privacy is assured by simply using the Internet in a way that is legal... they are uninteresting to a potential adversary. Thus, the Internet provides only the illusion of privacy. We see this demonstrated again and again in cases when people lose jobs, relationships, or worse from the revelation of communication intended to remain private...

Nix, Timothy Glen

2013-08-02

50

Security in Advanced Optical Communication Networks  

Microsoft Academic Search

The increased demand of data services within the last few years has prompted a commensurate explosion in transportable bandwidth, most of which contain sensitive information, personal data, bank accounts, credit card numbers, proprietary documents, and more. As a result, there are two types of security in communications, securing user data and securing the physical network. The first is addressed with

Stamatios V. Kartalopoulos

2009-01-01

51

Communication environments for local networks  

NASA Astrophysics Data System (ADS)

This report studies the problem of providing high performance communication services to computers on a local network, or other high-speed network, without sacrificing compatibility with existing communication protocols. The focus of the investigation is the network interface, the I/O controller which interfaces computers to the network medium. The network interface proposed in this report contains a novel processing element called the filter, in addition to a fairly common microprocessor based architecture. The filter is a high-speed custom processor and a memory which holds programmable descriptions of packet formats and connection records for the protocols supported by the interface. The filter could be implemented using VLSI or a small amount of readily available bit-slice components. The filter enables the interface to process most transmissions as they arrive on the communications medium. Filter processing adds negligible delay to the overall communication path and, in most cases, replaces processing which is conventionally performed in the software of the interface microprocessor or the host. Thus, communications systems built with the new interface are limited by the speed of the medium and not by processing delays. The filter interface is shown to be practical for a 10 Mbps medium and several protocols, including the Internet Protocol (IP) and the Transmission Control Protocol(TCP).

Mockapetris, P. V.

1982-12-01

52

Hubless satellite communications networks  

NASA Technical Reports Server (NTRS)

Frequency Comb Multiple Access (FCMA) is a new combined modulation and multiple access method which will allow cheap hubless Very Small Aperture Terminal (VSAT) networks to be constructed. Theoretical results show bandwidth efficiency and power efficiency improvements over other modulation and multiple access methods. Costs of the VSAT network are reduced dramatically since a hub station is not required.

Robinson, Peter Alan

1994-01-01

53

An ad hoc networking scheme in hybrid networks for emergency communications  

Microsoft Academic Search

This paper describes an ad hoc networking scheme and routing protocol for emergency communications. The objec- tive of the network is to collect damage assessment information quickly and stably in a disaster. The network is con- figured with a hybrid wireless network, combining ad hoc networks and a cellular network to maintain connectivity between a base station (BS) and nodes

Takahiro Fujiwara; Takashi Watanabe

2005-01-01

54

Information Horizons in Complex Networks  

NASA Astrophysics Data System (ADS)

We investigate how the structure constrain specific communication in social-, man-made and biological networks. We find that human networks of governance and collaboration are predictable on teat-a-teat level, reflecting well defined pathways, but globally inefficient (1). In contrast, the Internet tends to have better overall communication abilities, more alternative pathways, and is therefore more robust. Between these extremes are the molecular network of living organisms. Further, for most real world networks we find that communication ability is favored by topology on small distances, but disfavored at larger distances (2,3,4). We discuss the topological implications in terms of modularity and the positioning of hubs in the networks (5,6). Finally we introduce some simple models which demonstarte how communication may shape the structure of in particular man made networks (7,8). 1) K. Sneppen, A. Trusina, M. Rosvall (2004). Hide and seek on complex networks [cond-mat/0407055] 2) M. Rosvall, A. Trusina, P. Minnhagen and K. Sneppen (2004). Networks and Cities: An Information Perspective [cond-mat/0407054]. In PRL. 3) A. Trusina, M. Rosvall, K. Sneppen (2004). Information Horizons in Networks. [cond-mat/0412064] 4) M. Rosvall, P. Minnhagen, K. Sneppen (2004). Navigating Networks with Limited Information. [cond-mat/0412051] 5) S. Maslov and K. Sneppen (2002). Specificity and stability in topology of protein networks Science 296, 910-913 [cond-mat/0205380]. 6) A. Trusina, S. Maslov, P. Minnhagen, K. Sneppen Hierarchy Measures in Complex Networks. Phys. Rev. Lett. 92, 178702 [cond-mat/0308339]. 7) M. Rosvall and K. Sneppen (2003). Modeling Dynamics of Information Networks. Phys. Rev. Lett. 91, 178701 [cond-mat/0308399]. 8) B-J. Kim, A. Trusina, P. Minnhagen, K. Sneppen (2003). Self Organized Scale-Free Networks from Merging and Regeneration. nlin.AO/0403006. In European Journal of Physics.

Sneppen, Kim

2005-03-01

55

NASA Integrated Space Communications Network  

NASA Technical Reports Server (NTRS)

The NASA Integrated Network for Space Communications and Navigation (SCaN) has been in the definition phase since 2010. It is intended to integrate NASA s three existing network elements, i.e., the Space Network, Near Earth Network, and Deep Space Network, into a single network. In addition to the technical merits, the primary purpose of the Integrated Network is to achieve a level of operating cost efficiency significantly higher than it is today. Salient features of the Integrated Network include (a) a central system element that performs service management functions and user mission interfaces for service requests; (b) a set of common service execution equipment deployed at the all stations that provides return, forward, and radiometric data processing and delivery capabilities; (c) the network monitor and control operations for the entire integrated network are conducted remotely and centrally at a prime-shift site and rotating among three sites globally (a follow-the-sun approach); (d) the common network monitor and control software deployed at all three network elements that supports the follow-the-sun operations.

Tai, Wallace; Wright, Nate; Prior, Mike; Bhasin, Kul

2012-01-01

56

Information and Communication  

E-print Network

the Bachelor of Information Technology entry on page10. Showcase your cyber-security skills Each year Swinburne ICT students compete in Cyber Security Challenge Australia (CySCA), a government-sponsored cyber actions to enhance its network security. The teams were assessed by federal government and Telstra cyber-security

Liley, David

57

Multiple-Ring Digital Communication Network  

NASA Technical Reports Server (NTRS)

Optical-fiber digital communication network to support data-acquisition and control functions of electric-power-distribution networks. Optical-fiber links of communication network follow power-distribution routes. Since fiber crosses open power switches, communication network includes multiple interconnected loops with occasional spurs. At each intersection node is needed. Nodes of communication network include power-distribution substations and power-controlling units. In addition to serving data acquisition and control functions, each node acts as repeater, passing on messages to next node(s). Multiple-ring communication network operates on new AbNET protocol and features fiber-optic communication.

Kirkham, Harold

1992-01-01

58

Data communication network at the ASRM facility  

NASA Astrophysics Data System (ADS)

This report describes the simulation of the overall communication network structure for the Advanced Solid Rocket Motor (ASRM) facility being built at Yellow Creek near Iuka, Mississippi as of today. The report is compiled using information received from NASA/MSFC, LMSC, AAD, and RUST Inc. As per the information gathered, the overall network structure will have one logical FDDI ring acting as a backbone for the whole complex. The buildings will be grouped into two categories viz. manufacturing intensive and manufacturing non-intensive. The manufacturing intensive buildings will be connected via FDDI to the Operational Information System (OIS) in the main computing center in B_1000. The manufacturing non-intensive buildings will be connected by 10BASE-FL to the OIS through the Business Information System (BIS) hub in the main computing center. All the devices inside B_1000 will communicate with the BIS. The workcells will be connected to the Area Supervisory Computers (ASCs) through the nearest manufacturing intensive hub and one of the OIS hubs. Comdisco's Block Oriented Network Simulator (BONeS) has been used to simulate the performance of the network. BONeS models a network topology, traffic, data structures, and protocol functions using a graphical interface. The main aim of the simulations was to evaluate the loading of the OIS, the BIS, and the ASCs, and the network links by the traffic generated by the workstations and workcells throughout the site.

Moorhead, Robert J., II; Smith, Wayne D.

1993-08-01

59

Mathematical Foundations of Complex Networked Information Systems  

E-print Network

Mathematical Foundations of Complex Networked Information Systems CIME school/ Newcom++ school. The complexity is then a consequence of the interactions architecture described by a network and the solutions complex networks (e.g. internet, wireless communication networks, sensor networks). Randomness enter

Ceragioli, Francesca

60

Information and communication technology  

NASA Technical Reports Server (NTRS)

NASA and the National Science Foundation (NSF) commissioned a panel of U.S. experts to study the international status of satellite communications systems and technology. The study covers emerging systems concepts, applications, services, and the attendant technologies. The panel members traveled to Europe, Japan, and Russia to gather information firsthand. They visited 17 sites in Europe, 20 in Japan, and 4 in Russia. These included major manufacturers, government organizations, service providers, and associated research and development facilities. The panel's report was reviewed by the sites visited, by the panel, and by representatives of U.S. industry. The report details the information collected and compares it to U.S. activities.

Edelson, Burton I.; Pelton, Joseph N.; Bostian, Charles W.; Brandon, William T.; Chan, Vincent W. S.; Hager, E. Paul; Helm, Neil R.; Jennings, Raymond D.; Kwan, Robert K.; Mahle, Christoph E.

1994-01-01

61

Secure Network Communication Using Biometrics  

Microsoft Academic Search

In this paper we propose an architecture for secure access of computers inside an organization from a remote location. We use biometrics features and a one-time password mechanism on top of secure socket layer (SSL) for authentication. We also provide three layers of security levels for network communication, and also a mechanism for secure file accesses based on the security

Mahfuzur Rahman; Prabir Bhattacharya

2001-01-01

62

Communication in automation, including networking and wireless  

E-print Network

Communication in automation, including networking and wireless Nicholas Kottenstette and Panos J and networking in automation is given. Digital communication fundamentals are reviewed and networked control are presented. 1 Introduction 1.1 Why communication is necessary in automated systems Automated systems use

Antsaklis, Panos

63

The Structure of Online Consumer Communication Networks  

Microsoft Academic Search

In this paper we study the structure of the bilateral communication links within Online Consumer Communication Networks (OCCNs), such as virtual communities. Compared to the offline world, consumers in online networks are highly flexible to choose their communication partners and little is known about how this affects communication exchange structures. We analyze these structures by using a general approach from

Marjolein J. W. Harmsen-van Hout; P. Jean-Jacques Herings; Benedict G. C. Dellaert

2006-01-01

64

Communications for unattended sensor networks  

NASA Astrophysics Data System (ADS)

The future model of the US Army's Future Combat Systems (FCS) and the Future Force reflects a combat force that utilizes lighter armor protection than the current standard. Survival on the future battlefield will be increased by the use of advanced situational awareness provided by unattended tactical and urban sensors that detect, identify, and track enemy targets and threats. Successful implementation of these critical sensor fields requires the development of advanced sensors, sensor and data-fusion processors, and a specialized communications network. To ensure warfighter and asset survivability, the communications must be capable of near real-time dissemination of the sensor data using robust, secure, stealthy, and jam resistant links so that the proper and decisive action can be taken. Communications will be provided to a wide-array of mission-specific sensors that are capable of processing data from acoustic, magnetic, seismic, and/or Chemical, Biological, Radiological, and Nuclear (CBRN) sensors. Other, more powerful, sensor node configurations will be capable of fusing sensor data and intelligently collect and process data images from infrared or visual imaging cameras. The radio waveform and networking protocols being developed under the Soldier Level Integrated Communications Environment (SLICE) Soldier Radio Waveform (SRW) and the Networked Sensors for the Future Force Advanced Technology Demonstration are part of an effort to develop a common waveform family which will operate across multiple tactical domains including dismounted soldiers, ground sensor, munitions, missiles and robotics. These waveform technologies will ultimately be transitioned to the JTRS library, specifically the Cluster 5 requirement.

Nemeroff, Jay L.; Angelini, Paul; Orpilla, Mont; Garcia, Luis; DiPierro, Stefano

2004-07-01

65

Adoption of information and communication technology (ICT) in academic libraries: A strategy for library networking in Nigeria  

Microsoft Academic Search

Purpose – This study aims to investigate the extent of adoption of information and communication technology (ICT) in university libraries in Nigeria. Design\\/methodology\\/approach – Postal survey was the instrument used for data collection. Almost 60 per cent of the University Librarians out of the 29 university libraries surveyed completed their questionnaires. Findings – The results of the survey show that

Okon E. Ani; Jacob E. Esin; Nkoyo Edem

2005-01-01

66

Network design for information networks  

Microsoft Academic Search

We define a new class of network design problems motivated by designing information networks. In our model, the cost of transporting flow for a set of users (or servicing them by a facility) depends on the amount of information requested by the set of users. We assume that the aggregation cost follows economies of scale, that is, the incremental cost

Ara Hayrapetyan; Chaitanya Swamy; Éva Tardos

2005-01-01

67

Design and performance evaluation of a communication protocol for an information communication processing system  

Microsoft Academic Search

The problem of how to manage communication networks and network construction systems that are diverse and complex is discussed. The authors consider the necessity of network management systems which can supply information users with enhanced information services as well as monitoring and controlling network resources. The International Standard Organization (ISO) and ITU-T have been actively executing special studies on the

Won Ryu; Jae-Ho You; Dong-Won Kim; Tae-Joon Kim; Byeong-Nam Yoon

1994-01-01

68

Communication devices for network-hopping communications and methods of network-hopping communications  

DOEpatents

Wireless communication devices include a software-defined radio coupled to processing circuitry. The system controller is configured to execute computer programming code. Storage media is coupled to the system controller and includes computer programming code configured to cause the system controller to configure and reconfigure the software-defined radio to operate on each of a plurality of communication networks according to a selected sequence. Methods for communicating with a wireless device and methods of wireless network-hopping are also disclosed.

Buttles, John W

2013-04-23

69

Communication devices for network-hopping communications and methods of network-hopping communications  

DOEpatents

Wireless communication devices include a software-defined radio coupled to processing circuitry. The processing circuitry is configured to execute computer programming code. Storage media is coupled to the processing circuitry and includes computer programming code configured to cause the processing circuitry to configure and reconfigure the software-defined radio to operate on each of a plurality of communication networks according to a selected sequence. Methods for communicating with a wireless device and methods of wireless network-hopping are also disclosed.

Buttles, John W. (Idaho Falls, ID)

2011-12-20

70

Data communication network at the ASRM facility  

NASA Technical Reports Server (NTRS)

This three-year project (February 1991 to February 1994) has involved analyzing and helping to design the communication network for the Advanced Solid Rocket Motor (ASRM) facility at Yellow Creek, near Iuka, MS. The principal concerns in the analysis were the bandwidth (both on average and in the worst case) and the expandability of the network. As the communication network was designed and modified, a careful evaluation of the bandwidth of the network, the capabilities of the protocol, and the requirements of the controllers and computers on the network was required. The overall network, which was heterogeneous in protocol and bandwidth, needed to be modeled, analyzed, and simulated to obtain some degree of confidence in its performance capabilities and in its performance under nominal and heavy loads. The results of our analysis did have an impact on the design and operation of the ASRM facility. During 1993 we analyzed many configurations of this basic network structure. The analyses are described in detail in Section 2 and 3 herein. Section 2 reports on an analysis of the whole network. The preliminary results of that research indicated that the most likely bottleneck as the network traffic increased would be the hubs. Thus a study of Cabletron hubs was initiated. The results of that study are in Section 3. Section 4 herein reports on the final network configuration analyzed. When the ASRM facility was mothballed in December of 1993, this was basically the planned and partially installed network. A briefing was held at NASA/MSFC on December 7, 1993, at which time our final analysis and conclusions were disseminated. This report contains a written record of most of the information disseminated at that briefing.

Moorhead, Robert J., III; Smith, Wayne D.; Nirgudkar, Ravi; Dement, James

1994-01-01

71

Data communication network at the ASRM facility  

NASA Astrophysics Data System (ADS)

The main objective of the report is to present the overall communication network structure for the Advanced Solid Rocket Motor (ASRM) facility being built at Yellow Creek near Iuka, Mississippi. This report is compiled using information received from NASA/MSFC, LMSC, AAD, and RUST Inc. As per the information gathered, the overall network structure will have one logical FDDI ring acting as a backbone for the whole complex. The buildings will be grouped into two categories viz. manufacturing critical and manufacturing non-critical. The manufacturing critical buildings will be connected via FDDI to the Operational Information System (OIS) in the main computing center in B 1000. The manufacturing non-critical buildings will be connected by 10BASE-FL to the Business Information System (BIS) in the main computing center. The workcells will be connected to the Area Supervisory Computers (ASCs) through the nearest manufacturing critical hub and one of the OIS hubs. The network structure described in this report will be the basis for simulations to be carried out next year. The Comdisco's Block Oriented Network Simulator (BONeS) will be used for the network simulation. The main aim of the simulations will be to evaluate the loading of the OIS, the BIS, the ASCs, and the network links by the traffic generated by the workstations and workcells throughout the site.

Moorhead, Robert J., II; Smith, Wayne D.; Nirgudkar, Ravi; Zhu, Zhifan; Robinson, Walter

1993-02-01

72

Data communication network at the ASRM facility  

NASA Technical Reports Server (NTRS)

The main objective of the report is to present the overall communication network structure for the Advanced Solid Rocket Motor (ASRM) facility being built at Yellow Creek near Iuka, Mississippi. This report is compiled using information received from NASA/MSFC, LMSC, AAD, and RUST Inc. As per the information gathered, the overall network structure will have one logical FDDI ring acting as a backbone for the whole complex. The buildings will be grouped into two categories viz. manufacturing critical and manufacturing non-critical. The manufacturing critical buildings will be connected via FDDI to the Operational Information System (OIS) in the main computing center in B 1000. The manufacturing non-critical buildings will be connected by 10BASE-FL to the Business Information System (BIS) in the main computing center. The workcells will be connected to the Area Supervisory Computers (ASCs) through the nearest manufacturing critical hub and one of the OIS hubs. The network structure described in this report will be the basis for simulations to be carried out next year. The Comdisco's Block Oriented Network Simulator (BONeS) will be used for the network simulation. The main aim of the simulations will be to evaluate the loading of the OIS, the BIS, the ASCs, and the network links by the traffic generated by the workstations and workcells throughout the site.

Moorhead, Robert J., II; Smith, Wayne D.; Nirgudkar, Ravi; Zhu, Zhifan; Robinson, Walter

1993-01-01

73

Network and Index Coding with Application to Robust and Secure Communications  

E-print Network

Since its introduction in the year 2000 by Ahlswede et al., the network coding paradigm has revolutionized the way we understand information flows in networks. Traditionally, information transmitted in a communication network was treated as a...

El Rouayheb, Salim Y.

2011-02-22

74

Space network support for lunar communications  

NASA Technical Reports Server (NTRS)

The space network can provide high data rate lunar communications as an alternative or adjunct to an expansion of the deep space network. Use of a space-based system can provide continuous coverage for lunar users and reduce terrestrial communication costs by delivering data directly to a single domestic location. Adapting the space network for lunar communications support would also maximize the use of the existing and planned space network and Space Station infrastructure. Several alternative architectures are evaluated.

Jordan, Michael A.

1991-01-01

75

Congenital Heart Information Network  

MedlinePLUS

... heart defects. Important Notice The Congenital Heart Information Network website is temporarily out of service. Please join ... and Uwe Baemayr for The Congenital Heart Information Network Exempt organization under Section 501(c)3. Copyright © ...

76

Communication through resonance in spiking neuronal networks.  

PubMed

The cortex processes stimuli through a distributed network of specialized brain areas. This processing requires mechanisms that can route neuronal activity across weakly connected cortical regions. Routing models proposed thus far are either limited to propagation of spiking activity across strongly connected networks or require distinct mechanisms that create local oscillations and establish their coherence between distant cortical areas. Here, we propose a novel mechanism which explains how synchronous spiking activity propagates across weakly connected brain areas supported by oscillations. In our model, oscillatory activity unleashes network resonance that amplifies feeble synchronous signals and promotes their propagation along weak connections ("communication through resonance"). The emergence of coherent oscillations is a natural consequence of synchronous activity propagation and therefore the assumption of different mechanisms that create oscillations and provide coherence is not necessary. Moreover, the phase-locking of oscillations is a side effect of communication rather than its requirement. Finally, we show how the state of ongoing activity could affect the communication through resonance and propose that modulations of the ongoing activity state could influence information processing in distributed cortical networks. PMID:25165853

Hahn, Gerald; Bujan, Alejandro F; Frégnac, Yves; Aertsen, Ad; Kumar, Arvind

2014-08-01

77

TO APPEAR IN JOURNAL OF COMMUNICATIONS AND NETWORKS, 1999 1 An Unsupervised Hybrid Network for Blind  

E-print Network

TO APPEAR IN JOURNAL OF COMMUNICATIONS AND NETWORKS, 1999 1 An Unsupervised Hybrid Network.i.d. non�Gaussian sequences. We present an un� supervised hybrid network (a linear feedback network University, KOREA, Email: schoi@engine.chungbuk.ac.kr . A. Cichocki is with Lab for Open Information Systems

Choi, Seungjin

78

77 FR 36305 - Stream Communications Network & Media, Inc.; Order of Suspension of Trading  

Federal Register 2010, 2011, 2012, 2013

...EXCHANGE COMMISSION [File No. 500-1] Stream Communications Network & Media, Inc.; Order of Suspension of Trading June...information concerning the securities of Stream Communications Network & Media, Inc. because it has not filed any...

2012-06-18

79

Networked UAV Command, Control and Communication  

E-print Network

Networked UAV Command, Control and Communication Jack Elston , Eric Frew , Brian Argrow University of Colorado, Boulder, CO, 80309, USA The networked UAV command, control, and communication project for UAVs. The system utilizes an existing ad-hoc network to demonstrate the ability of UAVs to make mission

Frew, Eric W.

80

PIPELINES AS COMMUNICATION NETWORK LINKS  

SciTech Connect

This report presents the results of an investigation into two methods of using the natural gas pipeline as a communication medium. The work addressed the need to develop secure system monitoring and control techniques between the field and control centers and to robotic devices in the pipeline. In the first method, the pipeline was treated as a microwave waveguide. In the second method, the pipe was treated as a leaky feeder or a multi-ground neutral and the signal was directly injected onto the metal pipe. These methods were tested on existing pipeline loops at UMR and Batelle. The results reported in this report indicate the feasibility of both methods. In addition, a few suitable communication link protocols for this network were analyzed.

Kelvin T. Erickson; Ann Miller; E. Keith Stanek; C.H. Wu; Shari Dunn-Norman

2005-03-14

81

Communication via Quantum Neural Network  

E-print Network

In this study, the partially entangled neural networks is used to transfer information between two neurons, where the original teleportation protocol is employed this for this purpose. The effect of the network strength on the fidelity of the transported information is investigated. We show that as the strength of the network increases, the accuracy of the transformed information increases. As a practical application, we consider the spread of swine flu virus between two equivalent tranches of the community. In this treatment two factors are considered, one for humanity and the other for influence factor. The likelihood of infection between different age group is investigated, where we show that the strength of the neural network and the degree of infection plays an important role on transferring infection between different age group. From theoretical point of view, we show that it is possible to control the spread of the virus by controlling the network parameter. Also, by using local rotation, one can decrease the rate of infection between the young.

A. Al- Segher; Nasser Metwally

2009-12-13

82

On traffic analysis in anonymous communication networks  

E-print Network

In this dissertation, we address issues related to traffic analysis attacks and the engineering in anonymous communication networks. Mixes have been used in many anonymous communication systems and are supposed to provide countermeasures that can...

Zhu, Ye

2009-06-02

83

The Lower Saxony research network design of environments for ageing: towards interdisciplinary research on information and communication technologies in ageing societies.  

PubMed

Worldwide, ageing societies are bringing challenges for independent living and healthcare. Health-enabling technologies for pervasive healthcare and sensor-enhanced health information systems offer new opportunities for care. In order to identify, implement and assess such new information and communication technologies (ICT) the 'Lower Saxony Research Network Design of Environments for Ageing' (GAL) has been launched in 2008 as interdisciplinary research project. In this publication, we inform about the goals and structure of GAL, including first outcomes, as well as to discuss the potentials and possible barriers of such highly interdisciplinary research projects in the field of health-enabling technologies for pervasive healthcare. Although GAL's high interdisciplinarity at the beginning slowed down the speed of research progress, we can now work on problems, which can hardly be solved by one or few disciplines alone. Interdisciplinary research projects on ICT in ageing societies are needed and recommended. PMID:21133766

Haux, Reinhold; Hein, Andreas; Eichelberg, Marco; Appell, Jens-E; Appelrath, Hans-Jürgen; Bartsch, Christian; Bisitz, Thomas; Bitzer, Jörg; Blau, Matthias; Boll, Susanne; Buschermöhle, Michael; Büsching, Felix; Erdmann, Birte; Fachinger, Uwe; Felber, Juliane; Fleuren, Tobias; Gietzelt, Matthias; Goetze, Stefan; Gövercin, Mehmet; Helmer, Axel; Heuten, Wilko; Hohmann, Volker; Huber, Rainer; Hülsken-Giesler, Manfred; Jacobs, Gerold; Kayser, Riana; Kerling, Arno; Klingeberg, Timo; Költzsch, Yvonne; Künemund, Harald; Kunze, Jennifer; Ludwig, Wolfram; Marschollek, Michael; Martens, Birger; Meis, Markus; Meyer, Eike Michael; Meyer, Jochen; Nebel, Wolfgang; Neyer, Franz J; Okken, Petra-Karin; Remmers, Hartmut; Rölker-Denker, Lars; Rohdenburg, Thomas; Schilling, Meinhard; Schulze, Gisela C; Song, Bianying; Spehr, Jens; Steinhagen-Thiessen, Elisabeth; Tegtbur, Uwe; Thoben, Wilfried; Van Hengel, Peter; Wabnik, Stefan; Wahl, Friedrich; Wegel, Sandra; Wilken, Olaf; Winkelbach, Simon; Wist, Thorben; Wittrock, Manfred; Wolf, Klaus-Hendrik; Wolf, Lars; Zokoll-Van Derlaan, Melanie

2010-01-01

84

Computing, Information and Communications Technology (CICT) Website  

NASA Technical Reports Server (NTRS)

The Computing, Information and Communications Technology Program (CICT) was established in 2001 to ensure NASA's Continuing leadership in emerging technologies. It is a coordinated, Agency-wide effort to develop and deploy key enabling technologies for a broad range of mission-critical tasks. The NASA CICT program is designed to address Agency-specific computing, information, and communications technology requirements beyond the projected capabilities of commercially available solutions. The areas of technical focus have been chosen for their impact on NASA's missions, their national importance, and the technical challenge they provide to the Program. In order to meet its objectives, the CICT Program is organized into the following four technology focused projects: 1) Computing, Networking and Information Systems (CNIS); 2) Intelligent Systems (IS); 3) Space Communications (SC); 4) Information Technology Strategic Research (ITSR).

Hardman, John; Tu, Eugene (Technical Monitor)

2002-01-01

85

Ground Communications Networks for Aeronautical Operations  

Microsoft Academic Search

Three digital communications networks of the FAA performing essential services in support of the National Air Space System (NAS) are described and discussed. Designated as the Aeronautical Fixed Telecommunications Network (AFTN), the combined Weather Teletypewriter Networks A, C, and O, and the Service B Teletypewriter Network, respectively, these systems carry national and international digital message traffic in support of air

R. Decker

1973-01-01

86

Information and Communication  

E-print Network

-Wide-Web, the ubiqui- tous use of computers, cellular multimedia and wireless communications, robots in factories and pro- grammers. The hallmark of such smart systems is their integration of technologies from analogue

Henkel, Werner

87

A Community Information Network.  

ERIC Educational Resources Information Center

The possibility of creating in Canada a non-profit community information network (a set of linked data banks containing information for use by the general public) should be explored. A network to link together a set of data banks containing information for general public use would have the following merits: (1) By its effect on household…

Consumers' Association of Canada, Ottawa (Ontario).

88

[Impact of new information and communication technologies (NTIC) on hospital administration and patient management. Care Network for Diagnosing and Treating Neurologic Emergencies].  

PubMed

The combination of specialised in-patient management, the development of diagnostic and therapeutic tools, the standardisation of procedures and organisation of the dies will allow for improving the prognosis of neurological patients seen in emergency situations. In order to achieve this objective, the Networks for Diagnosing and Treating Neurological Emergencies (RAIDS-UN) in Franche-Comté (FC) aim to better the quality of in-patient management for emergency on-set neurological pathologies such as traumatic brain injuries and strokes, the preparation and structuring of the dies for diagnosis and treatment, and assistance in neurology decision making. Based upon the needs of networks which approach the problem from two different directions--the RAIDS-UN/FC network (for neurological emergencies) and the RAIDS-UN/AVC network (for prevention and treatment of strokes)--they should both be able to benefit from new information and communication technologies (ICTs) in order to promote and support innovations in practice and contribute to the improvement in quality and health promotion effectiveness. In light of these developments, one may better understand the significance of the School of Medicine's role in training experts, advisors and supervisors as well as in providing a high level of quality and effective continuing education. Since 2001, the expansion of the RAIDS-UN networks has emphasised the need for the development of new professional specialties arising on the border between technology and medicine. The operation of these networks requires a strong partnership with health professionals and strategically relies upon a regional dynamic interaction which includes the hospitals, the city, the institutions and the university. It is in this manner that the RAIDS-UN networks will support other initiatives such as the Towards Unity for Health project. PMID:12784495

Moulin, T; Retel, O; Chavot, D

2003-04-01

89

Information, Network & Cyber Security School COMSC  

E-print Network

260 Number of Credits 20 Level M Module Leader Pete Burnap Module offered on a free- standing basis for risk assessments and information security policies, standards, legal and ethical aspects of information for protecting communications between networks, types of network intrusion, types of malicious software

Martin, Ralph R.

90

Information Gap in Communicative Classrooms.  

ERIC Educational Resources Information Center

In traditional, grammar-oriented second language classrooms, the most common classroom procedure is for the teacher to ask the student a question for which the answer is already known to both. Because no real information is exchanged, this is not a communicative practice. It is alien to the real communicative needs of students, involves no…

Liao, Xiaoqing

91

Research Priorities in Networking and Communications.  

ERIC Educational Resources Information Center

A workshop focused on major research issues in networking and communications. This report defines the context for research priorities and initiatives and deals with issues in networking and communications. Fifteen major research priorities and four research specific initiatives were identified by participants as areas that should be pursued over…

National Science Foundation, Washington, DC.

92

Communications network design and costing model users manual  

NASA Technical Reports Server (NTRS)

The information and procedures needed to exercise the communications network design and costing model for performing network analysis are presented. Specific procedures are included for executing the model on the NASA Lewis Research Center IBM 3033 computer. The concepts, functions, and data bases relating to the model are described. Model parameters and their format specifications for running the model are detailed.

Logan, K. P.; Somes, S. S.; Clark, C. A.

1983-01-01

93

Optimized Flow Allocation for Anonymous Communication in Multipath Wireless Networks  

E-print Network

Optimized Flow Allocation for Anonymous Communication in Multipath Wireless Networks Chouchang Yang Arabia Abstract--In anonymous networks, a subset of nodes is chosen to act as covert relays to hide timing information from unau- thorized observers. While such covert relays increase anonymity, they cause

Poovendran, Radha

94

Effective Protocols for Mobile Communications and Networking  

SciTech Connect

This report examines methods of mobile communications with an emphasis on mobile computing and wireless communications. Many of the advances in communications involve the use of Internet Protocol (IP), Asynchronous Transfer Mode (ATM), and ad hoc network protocols. However, many of the advances in these protocols have been focused on wired communications. Recently much focus has been directed at advancing communication technology in the area of mobile wireless networks. This report discusses various protocols used in mobile communications and proposes a number of extensions to existing protocols. A detailed discussion is also included on desirable protocol characteristics and evaluation criteria. In addition, the report includes a discussion on several network simulation tools that maybe used to evaluate network protocols.

Espinoza, J.; Sholander, P.; Van Leeuwen, B,

1998-12-01

95

Wireless Network Communications Overview for Space Mission Operations  

NASA Technical Reports Server (NTRS)

The mission of the On-Board Wireless Working Group (WWG) is to serve as a general CCSDS focus group for intra-vehicle wireless technologies. The WWG investigates and makes recommendations pursuant to standardization of applicable wireless network protocols, ensuring the interoperability of independently developed wireless communication assets. This document presents technical background information concerning uses and applicability of wireless networking technologies for space missions. Agency-relevant driving scenarios, for which wireless network communications will provide a significant return-on-investment benefiting the participating international agencies, are used to focus the scope of the enclosed technical information.

Fink, Patrick W.

2009-01-01

96

Analyzing and Communicating Scientific Information  

NSDL National Science Digital Library

Using collaborative techniques, case studies, and extensive assessment, students in the Towson Transition Course at Towson University learned to access, evaluate, and communicate scientific information. A statistically significant increase in the average

Clements, James; Boucher, Laurence; Mangurian, Luz; Feldman, Susannah

2001-05-01

97

Communication delay analysis based on network calculus  

Microsoft Academic Search

Network calculus is a promising theory for analyzing and modeling networks based on min-plus algebra. Using network calculus theory, we propose formulas of arrival curve and service curve for end-to-end communication, build the corresponding time model, and derive the communication delay formulas for two scenarios of the model respectively. Then we take fat tree topology, which is widely used in

Yufei Lin; Xinhai Xu; Yisong Lin

2010-01-01

98

Rural Information Network.  

ERIC Educational Resources Information Center

This report describes the National Public Telecomputing Network's (NPTN) development of free, public-access, community computer systems throughout the United States. It also provides information on how to initiate a "Free-Net" through the Rural Information Network. Free-Nets are multi-user systems with some of the power and sophistication of…

National Public Telecomputing Network, Cleveland, OH.

99

ECE 333: Introduction to Communication Networks Lecture 2: Network Architectures  

E-print Network

for layer N+1. Service Interface: Rules for communicating about services. Protocol Stack: The set of a layer consists of two parts: 1) A standard protocol for the peer processes (entities) at that layer1 ECE 333: Introduction to Communication Networks Fall 2001 Lecture 2: Network Architectures

Berry, Randall

100

Intelligent Network Communications for Distributed Database Systems  

Microsoft Academic Search

Customizing network sites have become an increasingly important issue in distributed database systems. This will improve the network system performance by reducing the number of communications required for query processing in terms of retrieval and update transactions. This paper presents an intelligent clustering method for distributed database system that provides a structure for organizing large number of network sites into

Ismail Omar Hababeh

2010-01-01

101

The Future School Manager: Information and Communication Technology Aspects.  

ERIC Educational Resources Information Center

Argues that the competence demands of the future school manager in a decentralized system of local management of schools imply proficiency of the manager in the use of ICT (Information and Communications Technology). Discusses communication habits, information processing, networking, the promotion of shared values, and leadership development.…

Slenning, Kah

2000-01-01

102

Communication network activity: Network attributes of the young and elderly  

Microsoft Academic Search

This manuscript details a study aimed at preliminary exploration of the relationship between aging and changes in communication network composition and quality. Two age groups (young and elderly) were asked to recall their interpersonal communication for two days. Subjects also completed a relational assessment instrument for each person they communicated with. The results suggest that the elderly, as compared to

Brian R. Patterson

1995-01-01

103

75 FR 49870 - Effects on Broadband Communications Networks of Damage to or Failure of Network Equipment or...  

Federal Register 2010, 2011, 2012, 2013

...Network Equipment or Severe Overload AGENCY: Federal Communications...submitting comments and additional information on the notice process, see the SUPPLEMENTARY INFORMATION section of this document. FOR FURTHER INFORMATION CONTACT: Jeffery...

2010-08-16

104

Information and Communications Technologies (ICT) Center Print Publications  

NSDL National Science Digital Library

This website from the Information and Communication Technology (ICT) Center provides a list of print publications from the ICT Center Delmar Learning Series, created by Delmar Learning and the ICT Center. Titles include Introduction to Telecommunications Networks, Basic Telecommunications: The Physical Layer, Fiber Optic Communications and Network Security. The listings for each book include links to information and sample chapters on Delmar Learning's website, as well as links to order the titles on Amazon.com.

2012-10-29

105

Fishery management as a governance network: Examples from the Gulf of Maine and the potential for communication network analysis research  

E-print Network

for communication network analysis research in fisheries Troy W. Hartley Ã? Virginia Institute of Marine Sciences management Governance network Communication network analysis a b s t r a c t It has been suggested that the fisheries management process with multiple, informed stakeholders and socio-economic, political

Newman, Michael C.

106

The Geospatial Characteristics of a Social Movement Communication Network  

PubMed Central

Social movements rely in large measure on networked communication technologies to organize and disseminate information relating to the movements’ objectives. In this work we seek to understand how the goals and needs of a protest movement are reflected in the geographic patterns of its communication network, and how these patterns differ from those of stable political communication. To this end, we examine an online communication network reconstructed from over 600,000 tweets from a thirty-six week period covering the birth and maturation of the American anticapitalist movement, Occupy Wall Street. We find that, compared to a network of stable domestic political communication, the Occupy Wall Street network exhibits higher levels of locality and a hub and spoke structure, in which the majority of non-local attention is allocated to high-profile locations such as New York, California, and Washington D.C. Moreover, we observe that information flows across state boundaries are more likely to contain framing language and references to the media, while communication among individuals in the same state is more likely to reference protest action and specific places and times. Tying these results to social movement theory, we propose that these features reflect the movement’s efforts to mobilize resources at the local level and to develop narrative frames that reinforce collective purpose at the national level. PMID:23483885

Conover, Michael D.; Davis, Clayton; Ferrara, Emilio; McKelvey, Karissa; Menczer, Filippo; Flammini, Alessandro

2013-01-01

107

Optimizing secure communication standards for disadvantaged networks  

E-print Network

We present methods for optimizing standardized cryptographic message protocols for use on disadvantaged network links. We first provide an assessment of current secure communication message packing standards and their ...

Okano, Stephen Hiroshi

2009-01-01

108

Supporting fault-tolerant communication in networks  

E-print Network

OF SCIENCE Approved by: Co-Chairs of Committee, Jennifer Welch Alexander Sprintson Committee Member, Anxiao Jiang Head of Department, Valerie E. Taylor December 2008 Major Subject: Computer Engineering iii ABSTRACT Supporting Fault-Tolerant Communication... in Networks. (December 2008) Khushboo Kanjani, B.Tech., Indian Institute of Technology Roorkee, India Co?Chairs of Advisory Committee: Dr. Jennifer Welch Dr. Alex Sprintson We address two problems dealing with fault-tolerant communication in networks...

Kanjani, Khushboo

2009-05-15

109

Fractal Point Process and Queueing Theory and Application to Communication Networks.  

National Technical Information Service (NTIS)

In the past year, our broad program of research has continued to explore efficient solutions fundamental problems of communication for wireless and wired networks, exploiting interrelated perspectives from communication theory, information theory, signal ...

G. W. Wornell

1998-01-01

110

Quantum secure direct communication network with hyperentanglement  

NASA Astrophysics Data System (ADS)

We propose a quantum secure direct communication protocol with entanglement swapping and hyperentanglement. Any two users, Alice and Bob, can communicate with each other in a quantum network, even though there is no direct quantum channel between them. The trust center, Trent, who provides a quantum channel to link them by performing entanglement swapping, cannot eavesdrop on their communication. This protocol provides a high channel capacity because it uses hyperentanglement, which can be generated using a beta barium borate crystal.

Chang, Ho Hong; Jino, Heo; Jong In, Lim; Hyung, Jin Yang

2014-09-01

111

Information Dissemination and Information Assurance in Vehicular Networks: A Survey  

Microsoft Academic Search

Vehicular networks aimed toward providing roadside services such as traffic alerts, estimated time to reach a destination, alternative routes, and in general improve the efficiency and safety on the road are emerging in both the United States and Europe. Information exchange in such networks occurs between vehicles (inter-vehicle communications) in an ad hoc manner and also with roadside base stations

Prashant Krishnamurthy

112

Space Station Information System integrated communications concept  

NASA Technical Reports Server (NTRS)

This paper presents a model for integrated communications within the Space Station Information System (SSIS). The SSIS is generally defined as the integrated set of space and ground information systems and networks which will provide required data services to the Space Station flight crew, ground operations personnel, and customer communities. This model is based on the International Standards Organization (ISO) layered model for Open Systems Interconnection (OSI). The requirements used to develop the model are presented, and the various elements of the model described.

Muratore, J.; Bigham, J.; Whitelaw, V.; Marker, W.

1987-01-01

113

Information & Communication Technology Emergency Instructions  

E-print Network

Information & Communication Technology Emergency Instructions In the event of an EMERGENCY dial 403-220-5333 for Campus Security or dial 9-1-1 for Police, Fire or Ambulance Additional emergency instructions is found the area for Campus Security or emergency services to arrive Evacuation Procedures Activate the NEAREST

de Leon, Alex R.

114

Stress Testing of Data-Communication Networks  

NASA Technical Reports Server (NTRS)

NetStress is a computer program that stress-tests a data-communication network and components thereof. NetStress comprises two components running, respectively, in a transmitting system and a receiving system connected to a network under test

Leucht, Kurt; Bedette, Guy

2006-01-01

115

Laser satellite communication network-vibration effect and possible solutions  

Microsoft Academic Search

A number of serious consortiums develop satellite communication networks. The objective of these communication projects is to service personal communication users almost everywhere on Earth. The intersatellite links in those projects use microwave radiation as the carrier. Free-space optical communication between satellites networked together can make possible high-speed communication between different places on Earth. Some advantages of an optical communication

SHLOMI ARNON; N. S. Kopeika

1997-01-01

116

Multicriteria Steiner Tree Problem for Communication Network  

E-print Network

This paper addresses combinatorial optimization scheme for solving the multicriteria Steiner tree problem for communication network topology design (e.g., wireless mesh network). The solving scheme is based on several models: multicriteria ranking, clustering, minimum spanning tree, and minimum Steiner tree problem. An illustrative numerical example corresponds to designing a covering long-distance Wi-Fi network (static Ad-Hoc network). The set of criteria (i.e., objective functions) involves the following: total cost, total edge length, overall throughput (capacity), and estimate of QoS. Obtained computing results show the suggested solving scheme provides good network topologies which can be compared with minimum spanning trees.

Levin, Mark Sh

2011-01-01

117

An On-Chip CDMA Communication Network  

Microsoft Academic Search

An on-chip packet-switched communication network which applies code-division multiple access (CDMA) technique has been developed and implemented in register-transfer level (RTL) using VHDL. In order to support globally-asynchronous locally-synchronous (GALS) communication scheme, the proposed CDMA on-chip network combines both synchronous and asynchronous circuits together. In a packet-switched network-on-chip (NoC) which applies point-to-point connection scheme, the data transfer latency varies largely

Xin Wang; J. Nurmi

2005-01-01

118

Information Diffusion in Overlaying Social-Physical Networks  

E-print Network

information spreads amongst people through conventional communication media (e.g., face-to-face communication that conjoining the physical network with online social networks can have a dramatic impact on the speed and scale. Motivation and Background Modern society relies on basic physical network infrastruc- tures, such as power

Yagan, Osman

119

Blended Learning Networks Supported by Information and Communication Technology: An Intervention for Knowledge Transformation within Family Care of Older People  

ERIC Educational Resources Information Center

Purpose: This article describes an innovative practice called Blended Learning Networks (BLNs) whose aim is to enable older people, their families, and care providers to exchange knowledge, learn together, and support each other in local development work so that care is improved for older people. BLNs were established in 31 municipalities, headed…

Hanson, Elizabeth; Magnusson, Lennart; Sennemark, Eva

2011-01-01

120

Information transfer among widely spaced individuals: latrines as a basis for communication networks in the swift fox?  

Microsoft Academic Search

In species where individuals are widely spaced instantaneous signals cannot readily form the basis of com- munication networks, that is several individuals within signalling range of each other. However, markings, signals that remain in the environment after the signaller has left, may fulfil this role. In this study, we have investigated the possible function of swift fox, Vulpes velox, latrines,

Safi K. Darden; Lise K. Steffensen; Torben Dabelsteen

2008-01-01

121

Child Rights Information Network Newsletter, 1996.  

ERIC Educational Resources Information Center

These two newsletter issues communicate activities of the newly formed Child Rights Information Network (CRIN) and report on emerging information resources and activities concerning children and child rights. The January 1996 issue describes the history of CRIN, provides updates on the activities of projects linked to CRIN, and summarizes…

Purbrick, Becky, Ed.

1996-01-01

122

Networks, Information and Choice  

Microsoft Academic Search

\\u000a We focus on information sharing in collaboration networks and discuss a feedback model for situational awareness, that combines\\u000a exogenously given characteristics of nodes with their positioning within the network topology. Here, situational awareness\\u000a is generally understood to mean “knowing what is going on”, implying the possession of knowledge and understanding to achieve\\u000a a certain goal. Using this feedback model, we

René Janssen; Herman Monsuur

2010-01-01

123

The Lymphoma Information Network  

NSDL National Science Digital Library

The Lymphoma Information Network website strives to "put a bit of humanity and understanding to this disease, to gather lymphoma information and resources in one place, and to present information in an easy to understand and logical format." The award-winning site offers information sections on Hodgkin's Lymphoma, Non-Hodgkin's Lymphoma, Fighting Lymphoma, and Surviving Lymphoma. The site also offers a special resource section for kids and teenagers, and information about childhood lymphoma. In addition, the site contains an extensive Glossary of Lymphoma Terms, The Lymphoma Blog, resources for independent research, book lists, and related links.

124

SpecialNet. A National Computer-Based Communications Network.  

ERIC Educational Resources Information Center

"SpecialNet," a computer-based communications network for educators at all administrative levels, has been established and is managed by National Systems Management, Inc. Users can send and receive electronic mail, share information on electronic bulletin boards, participate in electronic conferences, and send reports and other documents to each…

Morin, Alfred J.

1986-01-01

125

Multiple communication networks for a radiological PACS  

NASA Astrophysics Data System (ADS)

The authors have implemented a communication network connecting multiple buildings for their picture archiving and communication system (PACS) in the Radiology Department at UCLA. The network consists of three types of local area networks (LANs) and a 1.0-km fiber-optic link connecting the outpatient and inpatient facilities. Images from radiologic imaging devices (4 CT scanners, 5 MR scanners, 4 CR units and 5 film digitizers) are transmitted to the acquisition computers via the Ethernet LAN. The fiber distributed data interface (FDDI) LAN then provides data communication among the cluster controllers, the acquisition computers, and the database servers. A 1-gigabit UltraNet LAN is used to route images from the cluster controllers to remote display workstations. All inter-building connections are through fiber-optic cables. Among these multiple networks, Ethernet offers multi-access to the multimodal PACS in image acquisition, FDDI controls a fast data flow so that all acquired images have a shorter residence time on local disks, and UltraNet provides high-speed transfer of images from the cluster controllers to the display workstations. The three-tiered functionality of Ethernet, FDDI, and UltraNet eliminates network traffic bottlenecks and hence provides high performance in image communication. The delay time of a 2K X 2K X 8-bit CR image (4 MBytes) from acquisition to display is less than 5 minutes. In addition, the standard Ethernet serves as a backup to guarantee network connectivity of the entire PACS.

Wong, Albert W. K.; Stewart, Brent K.; Lou, Shyhliang A.; Chan, Kelby K.; Huang, H. K.

1991-07-01

126

EECS 122EECS 122 Communications NetworksCommunications Networks  

E-print Network

@kfall@cscs..berkeleyberkeley..eduedu Spring, 1999Spring, 1999 Course InformationCourse Information ·· Instructor: Kevin Fall (kfall Soda HallSoda Hall ·· Home Page:Home Page: ­­ http 21, 12:30-3:30 [19]Final Exam: May 21, 12:30-3:30 [19] #12;TA InformationTA Information ·· Wilson So

Fall, Kevin R.

127

Earth System Science Informal Education Network (ESSIEN)  

NSDL National Science Digital Library

The Earth System Science Informal Education Network (ESSIEN) is dedicated to improving Earth system literacy through increased communication and collaboration among providers of informal Earth system education. The collection is designed for museum professionals (educators, exhibits designers, developers) as a resource of ideas, tools, traveling exhibits and online materials. The resources are web portals to organizations providing substantial informal Earth system science education. They describe educational programming, resources and exhibits that are pertinent to an informal educator.

2007-04-03

128

The NASA Space Communications Data Networking Architecture  

NASA Technical Reports Server (NTRS)

The NASA Space Communications Architecture Working Group (SCAWG) has recently been developing an integrated agency-wide space communications architecture in order to provide the necessary communication and navigation capabilities to support NASA's new Exploration and Science Programs. A critical element of the space communications architecture is the end-to-end Data Networking Architecture, which must provide a wide range of services required for missions ranging from planetary rovers to human spaceflight, and from sub-orbital space to deep space. Requirements for a higher degree of user autonomy and interoperability between a variety of elements must be accommodated within an architecture that necessarily features minimum operational complexity. The architecture must also be scalable and evolvable to meet mission needs for the next 25 years. This paper will describe the recommended NASA Data Networking Architecture, present some of the rationale for the recommendations, and will illustrate an application of the architecture to example NASA missions.

Israel, David J.; Hooke, Adrian J.; Freeman, Kenneth; Rush, John J.

2006-01-01

129

Global Communications Network 2.9.1  

NSDL National Science Digital Library

More and more individuals are turning to the Internet to communicate with colleagues, friends, and relatives and there are a number of helpful programs currently available for general use. This edition of the Global Communications Network application allows visitors to engage in video and voice chat and administer their own chat rooms, all within a secure format. This version is compatible with Windows 95 or newer.

130

Reliability and survivability of communication networks  

Microsoft Academic Search

We assume that we have an (n,m)-graph with n vertices and m edges, representing a communications network with each vertex representing a processor and each edge a communications link. We have begun our work by concentrating on the cutting number\\/pair-connected reliability measure and have initially assumed that each vertex will always remain operable and that each edge has the same

Peter J. Slater; Ashok T. Amin; Kyle T. Siegrist

1987-01-01

131

Exponential Separation of Information and Communication  

E-print Network

Exponential Separation of Information and Communication Anat Ganor Gillat Kol Ran Raz Abstract We show an exponential gap between communication complexity and information complexity, by giving an explicit example for a communication task (relation), with information complexity O(k), and distributional

Raz, Ran

132

EECS 122EECS 122 Communications NetworksCommunications Networks  

E-print Network

@kfall@cscs..berkeleyberkeley..eduedu 2 Course InformationCourse Information ··Instructor: Kevin Fall (kfall@Instructor: Kevin Fall (kfall@cscs)) ··Office Hours: Thursdays 10-11am in 741 Soda HallOffice Hours: Thursdays 10-11am in 741 Soda Hall ··Home:30-3:30 [19]Final Exam: May 21, 12:30-3:30 [19] 3 TA InformationTA Information ··Wilson SoWilson So ­­ Office

Fall, Kevin R.

133

College of Communication and Information ISC Integrated Strategic Communication  

E-print Network

strategic communication and its role in contemporary business and society. Includes an historical and socio) Acomparisonofthecommunicationsmediaindifferentcountriesoftheworldandthetheoriesusedtojustifythem.Howvariouspolitical and social systems affect the media and how the media affect the societiesCollege of Communication and Information ISC Integrated Strategic Communication KEY: # = new course

MacAdam, Keith

134

A Communications Network for Cislunar Operations  

NASA Technical Reports Server (NTRS)

Reliable and efficient communications will be critical to the success of commercial flight operations in cislunar space. The Internet is not well-suited to meeting this requirement. But the Delay-Tolerant Networking (DTN) architecture is. The DTN protocols are well-documented and implementations are mature. We think DTN will be ready to support low-cost, low-risk cislunar networking by the time the vehicles are in place.

Burleigh, Scott

2012-01-01

135

Communication Options for Network RTK \\/ SAPOS® Realization  

Microsoft Academic Search

Real-Time Kinematic (RTK) service providers compute RTK corrections based on the observations of networks of GNSS (Global Navigation Satellite Systems like GPS or GLON- ASS) reference stations with station distances of about 50 to 80 kilometres. This correction data enables Network RTK users to position themselves with centimetre accuracy in real-time using a single GNSS-receiver. The selection of appropriate communication

Volker WEGENER; Lambert WANNINGER

136

Social Networking and Smart Technology: Viable Environmental Communication Tools…?  

NASA Astrophysics Data System (ADS)

To what extent do popular social networking channels represent a viable means for disseminating information regarding environmental change to the general public? Are new forms of communication such as YouTube™, Facebook™, MySpace™ and Twitter™ and smart devices such as iPhone™ and BlackBerry™ useful and effective in terms motivating people into social action and behavioural modification; or do they simply pay ‘lip service’ to these pressing environmental issues? This project will explore the background connections between social networking and environmental communication and education; and outline why such tools might be an appropriate way to connect to a broad audience in an efficient and unconventional manner. Further, research will survey the current prevalence of reliable environmental change information on social networking Internet-based media; and finally, suggestions for improved strategies and new directions will be provided.

Montain, J.; Byrne, J. M.

2010-12-01

137

Hybrid Mobile Communication Networks for Planetary Exploration  

NASA Technical Reports Server (NTRS)

A paper discusses the continuing work of the Mobile Exploration System Project, which has been performing studies toward the design of hybrid communication networks for future exploratory missions to remote planets. A typical network could include stationary radio transceivers on a remote planet, mobile radio transceivers carried by humans and robots on the planet, terrestrial units connected via the Internet to an interplanetary communication system, and radio relay transceivers aboard spacecraft in orbit about the planet. Prior studies have included tests on prototypes of these networks deployed in Arctic and desert regions chosen to approximate environmental conditions on Mars. Starting from the findings of the prior studies, the paper discusses methods of analysis, design, and testing of the hybrid communication networks. It identifies key radio-frequency (RF) and network engineering issues. Notable among these issues is the study of wireless LAN throughput loss due to repeater use, RF signal strength, and network latency variations. Another major issue is that of using RF-link analysis to ensure adequate link margin in the face of statistical variations in signal strengths.

Alena, Richard; Lee, Charles; Walker, Edward; Osenfort, John; Stone, Thom

2007-01-01

138

Computer and information networks.  

PubMed

The most basic conclusion coming out of the EDUCOM seminars is that computer networking must be acknowledged as an important new mode for obtaining information and computation (15). It is a real alternative that needs to be given serious attention in current planning and decision-making. Yet the fact is that many institutions are not taking account of networks when they confer on whether or how to replace their main computer. Articulation of the possibilities of computer networks goes back to the early 1960's and before, and working networks have been in evidence for several years now, both commercially and in universities. What is new, however, is the unmistakable recognition-bordering on a sense of the inevitable-that networks are finally practical and here to stay. The visionary and promotional phases of computer networks are over. It is time for hard-nosed comparative analysis (16). Another conclusion of the seminars has to do with the factors that hinder the fuller development of networking. The major problems to be overcome in applying networks to research and education are political, organizational, and economic in nature rather than technological. This is not to say that the hardware and software problems of linking computers and information systems are completely solved, but they are not the big bottlenecks at present. Research and educational institutions must find ways to organize themselves as well as their computers to work together for greater resource sharing. The coming of age of networks takes on special significance as a result of widespread dissatisfactions expressed with the present computing situation. There is a feeling that the current mode of autonomous, self-sufficient operation in the provision of computing and information services is frequently wasteful, deficient, and unresponsive to users' needs because of duplication of effort from one installation to another, incompatibilities, and inadequate documentation, program support, and user assistance. Complaints about the relative lack of uniform standards and the paucity of information on what programs and data are available and how to get and use them are commonplace. The human tendency, when beset by problems such as these, is to seek a savior in the next new technology-networks in this case. But networking does not in and of itself offer a solution to current deficiencies. What it does offer is a promising vehicle with which to bring about important changes in user practices, institutional procedures, and government policy that can lead to effective solutions. Thus more critical than whether networking is developed and applied is how it is developed and applied. For example, networking emphasizes the need for standards and good documentation. Unless effective mechanisms are developed and strong measures taken in networking to ensure that suitable standards and documentation are developed, present inadequacies could get worse, not better. PMID:4730053

Greenberger, M; Aronofsky, J; McKenney, J L; Massy, W F

1973-10-01

139

Interactive Weather Information Network  

NSDL National Science Digital Library

Offered by the National Oceanic and Atmospheric Administration (NOAA), the Interactive Weather Information Network (IWIN) is a collection of interactive weather maps and satellite images that is updated every five seconds. Visitors can see cloud cover animation loops, NEXRAD Radar images of precipitation, a map of all current weather fronts, and an interactive national map to see information about any particular state. Other information on the site includes a listing of any active weather warnings, a link for world weather data, and more, making this a must-see site for all those users interested in the most current weather happenings anywhere.

2002-01-01

140

Universities Water Information Network  

NSDL National Science Digital Library

The Universities Water Information Network (UWIN), located at Southern Illinois University in Carbondale, Illinois, "disseminates information of interest to the water resources community and all concerned with our water resources." Although much of the site is accessed by paid subscription only, several resources are offered free to anyone. A database of water related consulting firms contains contact information, including name, acronym, postal address, phone, fax, email, and contact person. Another helpful resource, the organizations database, lists water resource agencies, organizations, and institutions in the US, Caribbean, and Central America. Other items of interest include job listings, press releases, and more.

2001-01-01

141

The Cancer Information Network  

NSDL National Science Digital Library

The Cancer Information Network is a noncommercial website that was "founded to provide support and information to cancer patients and their caregivers." The site offers access to a plethora of resources that can help patients and others find current high-quality information on many types of cancer. Resource links are provided for many specific cancer subject areas including Breast Cancer, Colorectal Cancer, Esophageal Cancer, Lung Cancer, and many more. The site includes sections on News & Features, Support, and Prevention as well. The site also offers lists of relevant websites, support organizations, and a dictionary of cancer-related terms.

142

The Automated Digital Network System (ADNS) Interface to Transformational Satellite Communications System (TSAT)  

Microsoft Academic Search

The U. S. Department of Defense (DoD) is in the initial phase of building the Global Information Grid (GIG), a private secure internetwork connecting a number of its joint and service-specific IP networks. Two of these networks are the Automated Digital Network System (ADNS) and the Transformational Satellite Communications System (TSAT). ADNS provides network services and entry into the Defense

Joanna N. Ptasinski; Yenchi Congtang

2007-01-01

143

Graphene-enabled Wireless Communication Networks  

E-print Network

Graphene-enabled Wireless Communication Networks at the Nanoscale 1 Ignacio Llatser Nanonetworking;Graphene Honeycomb lattice of carbon atoms 2-dimensional material Discovered by A. K. Geim and K. S. Novoselov 9 Graphene G. Liu, W. Stillman, S. Rumyantsev, Q. Shao, M. Shur, A. A. Balandin, "Low

Politècnica de Catalunya, Universitat

144

Name of Module: Communication Network Security  

E-print Network

skills 5% social skills 15% 2. Content Introduction (Attacks, Services, Mechanisms) Classical Encryption Reading, Lecture Notes Lecture notes available in paper form? yes X no Lecture notes in paper form and solutions for communications networks. Lecture supported by the project will enable students to analyse

Wichmann, Felix

145

Protocol for Communication Networking for Formation Flying  

NASA Technical Reports Server (NTRS)

An application-layer protocol and a network architecture have been proposed for data communications among multiple autonomous spacecraft that are required to fly in a precise formation in order to perform scientific observations. The protocol could also be applied to other autonomous vehicles operating in formation, including robotic aircraft, robotic land vehicles, and robotic underwater vehicles. A group of spacecraft or other vehicles to which the protocol applies could be characterized as a precision-formation- flying (PFF) network, and each vehicle could be characterized as a node in the PFF network. In order to support precise formation flying, it would be necessary to establish a corresponding communication network, through which the vehicles could exchange position and orientation data and formation-control commands. The communication network must enable communication during early phases of a mission, when little positional knowledge is available. Particularly during early mission phases, the distances among vehicles may be so large that communication could be achieved only by relaying across multiple links. The large distances and need for omnidirectional coverage would limit communication links to operation at low bandwidth during these mission phases. Once the vehicles were in formation and distances were shorter, the communication network would be required to provide high-bandwidth, low-jitter service to support tight formation-control loops. The proposed protocol and architecture, intended to satisfy the aforementioned and other requirements, are based on a standard layered-reference-model concept. The proposed application protocol would be used in conjunction with conventional network, data-link, and physical-layer protocols. The proposed protocol includes the ubiquitous Institute of Electrical and Electronics Engineers (IEEE) 802.11 medium access control (MAC) protocol to be used in the datalink layer. In addition to its widespread and proven use in diverse local-area networks, this protocol offers both (1) a random- access mode needed for the early PFF deployment phase and (2) a time-bounded-services mode needed during PFF-maintenance operations. Switching between these two modes could be controlled by upper-layer entities using standard link-management mechanisms. Because the early deployment phase of a PFF mission can be expected to involve multihop relaying to achieve network connectivity (see figure), the proposed protocol includes the open shortest path first (OSPF) network protocol that is commonly used in the Internet. Each spacecraft in a PFF network would be in one of seven distinct states as the mission evolved from initial deployment, through coarse formation, and into precise formation. Reconfiguration of the formation to perform different scientific observations would also cause state changes among the network nodes. The application protocol provides for recognition and tracking of the seven states for each node and for protocol changes under specified conditions to adapt the network and satisfy communication requirements associated with the current PFF mission phase. Except during early deployment, when peer-to-peer random access discovery methods would be used, the application protocol provides for operation in a centralized manner.

Jennings, Esther; Okino, Clayton; Gao, Jay; Clare, Loren

2009-01-01

146

The Deep Space Network. [tracking and communication functions and facilities  

NASA Technical Reports Server (NTRS)

The objectives, functions, and organization of the Deep Space Network are summarized. The Deep Space Instrumentation Facility, the Ground Communications Facility, and the Network Control System are described.

1974-01-01

147

Communication Networks in the Brain  

PubMed Central

Nerve cells (i.e., neurons) communicate via a combination of electrical and chemical signals. Within the neuron, electrical signals driven by charged particles allow rapid conduction from one end of the cell to the other. Communication between neurons occurs at tiny gaps called synapses, where specialized parts of the two cells (i.e., the presynaptic and postsynaptic neurons) come within nanometers of one another to allow for chemical transmission. The presynaptic neuron releases a chemical (i.e., a neurotransmitter) that is received by the postsynaptic neuron’s specialized proteins called neurotransmitter receptors. The neurotransmitter molecules bind to the receptor proteins and alter postsynaptic neuronal function. Two types of neurotransmitter receptors exist—ligand-gated ion channels, which permit rapid ion flow directly across the outer cell membrane, and G-protein–coupled receptors, which set into motion chemical signaling events within the cell. Hundreds of molecules are known to act as neurotransmitters in the brain. Neuronal development and function also are affected by peptides known as neurotrophins and by steroid hormones. This article reviews the chemical nature, neuronal actions, receptor subtypes, and therapeutic roles of several transmitters, neurotrophins, and hormones. It focuses on neurotransmitters with important roles in acute and chronic alcohol effects on the brain, such as those that contribute to intoxication, tolerance, dependence, and neurotoxicity, as well as maintained alcohol drinking and addiction. PMID:23584863

Lovinger, David M.

2008-01-01

148

Performance analysis for gigabit Ethernet communication network under various data rates and switching structures  

NASA Astrophysics Data System (ADS)

This paper reports recent work on gigabit Ethernet interconnection communication traffic analysis. We proposed and demonstrated the system concept of gigabit Ethernet communication. 1.25Gbps, 10Gpbs and 40Gpbs gigabit Ethernet interconnection networks are considered for computer communications. Various switching structures, such as crossbar, double crossbar (Dcrossbar), Modified Dilated Benes (MDB), General MDB (GMDB), Benes, Dilated Benes (Dbenes), Tree architecture, Simplified tree (Stree), Extended baseline network (Ebaseline) are analyzed for searching the optimal performance of gigabit Ethernet communication. The numerical results for computation information transferring can be applied to search a best strategy for gigabit Ethernet communication networks interconnections.

Tsao, Shyh-Lin; Wu, Jun-Yi

2004-11-01

149

Estimating computer communication network performance using network simulations  

SciTech Connect

A generalized queuing model simulation of store-and-forward computer communication networks is developed and implemented using Simulation Language for Alternative Modeling (SLAM). A baseline simulation model is validated by comparison with published analytic models. The baseline model is expanded to include an ACK/NAK data link protocol, four-level message precedence, finite queues, and a response traffic scenario. Network performance, as indicated by average message delay and message throughput, is estimated using the simulation model.

Garcia, A.B.

1985-01-01

150

Topology design and performance analysis of an integrated communication network  

NASA Technical Reports Server (NTRS)

A research study on the topology design and performance analysis for the Space Station Information System (SSIS) network is conducted. It is begun with a survey of existing research efforts in network topology design. Then a new approach for topology design is presented. It uses an efficient algorithm to generate candidate network designs (consisting of subsets of the set of all network components) in increasing order of their total costs, and checks each design to see if it forms an acceptable network. This technique gives the true cost-optimal network, and is particularly useful when the network has many constraints and not too many components. The algorithm for generating subsets is described in detail, and various aspects of the overall design procedure are discussed. Two more efficient versions of this algorithm (applicable in specific situations) are also given. Next, two important aspects of network performance analysis: network reliability and message delays are discussed. A new model is introduced to study the reliability of a network with dependent failures. For message delays, a collection of formulas from existing research results is given to compute or estimate the delays of messages in a communication network without making the independence assumption. The design algorithm coded in PASCAL is included as an appendix.

Li, V. O. K.; Lam, Y. F.; Hou, T. C.; Yuen, J. H.

1985-01-01

151

Networked sensor communications for the objective force  

NASA Astrophysics Data System (ADS)

The US Army's Future Combat Systems (FCS) and Objective Force will rely heavily on the use of unattended sensor networks to detect, locate and identify enemy targets in order to survive with less armor protection on the future battlefield. Successful implementation of these critical communication networks will require the collection of the sensor data, processing and collating it with available intelligence, then transporting it in a format conducive to make quick and accurate command decisions based on the latest tactical situational awareness. The networked communications must support both static deployed and mobile ground and air robotic sensors with secure, stealthy, and jam resistant links for sensor fusion and command and control. It is envisioned for broadest application that sensor networks can be deployed in a two-tiered architecture. The architecture includes a lower sensor sub- layer consisting of mixes of acoustic, magnetic and seismic detectors and an upper sub-layer consisting of infrared or visual imagers. The upper sub-layer can be cued by the lower sub-layer and provides a gateway link to the higher echelon tactical maneuver layer networks such as the Tactical Internet. The sensor deployments, networking constraints and reach back distances to Command and Control (C2) nodes will be mission scenario specific, however, the architecture will also apply to tactical unattended sensor, munition and robotic application. Technologies from the Army Research Laboratory, Defense Research Projects Agency (DARPA), and commercial will be leveraged for this effort.

Nemeroff, Jay L.; Garcia, Luis; Hampel, Daniel; DiPierro, Stefano

2002-08-01

152

Networked sensor communications for the objective force  

NASA Astrophysics Data System (ADS)

The US Army's Future Combat Systems (FCS) and Objective Force will rely heavily on the use of unattended sensor networks to detect, locate and identify enemy targets in order to survive with less armor protection on the future battlefield. Successful implementation of these critical communication networks will require the collection of the sensor data, processing and collating it with available intelligence, then transporting it in a format conducive to make quick and accurate command decisions based on the latest tactical situational awareness. The networked communications must support both static deployed and mobile ground and air robotic sensors with secure, stealthy, and jam resistant links for sensor fusion and command and control. It is envisioned for broadest application that sensor networks can be deployed in a two-tiered architecture. The architecture includes a lower sensor sub-layer consisting of mixes of acoustic, magnetic and seismic detectors and an upper sub-layer consisting of infrared or visual imagers. The upper sub-layer can be cued by the lower sub-layer and provides a gateway link to the higher echelon tactical maneuver layer networks such as the Tactical Internet. The sensor deployments, networking constraints and reach back distances to Command and Control (C2) nodes will be mission scenario specific, however, the architecture will also apply to tactical unattended sensor, munition and robotic applications. Technologies from the Army Research Laboratory, Defense Advance Research Projects Agency (DARPA), and commercial will be leveraged for this effort.

Nemeroff, Jay L.; Garcia, Luis; Hampel, Daniel; Di Pierro, Stefano

2002-08-01

153

Communicability Graph and Community Structures in Complex Networks  

E-print Network

Communicability Graph and Community Structures in Complex Networks Ernesto Estrada,1-4* Naomichi communities in a complex network. The communities are defined as the cliques of a "communicability graph". The communicability graph is defined here as the graph having the same set of vertices as the complex network

Mottram, Nigel

154

Information diffusion epidemics in social networks  

E-print Network

The dynamics of information dissemination in social networks is of paramount importance in processes such as rumors or fads propagation, spread of product innovations or "word-of-mouth" communications. Due to the difficulty in tracking a specific information when it is transmitted by people, most understanding of information spreading in social networks comes from models or indirect measurements. Here we present an integrated experimental and theoretical framework to understand and quantitatively predict how and when information spreads over social networks. Using data collected in Viral Marketing campaigns that reached over 31,000 individuals in eleven European markets, we show the large degree of variability of the participants' actions, despite them being confronted with the common task of receiving and forwarding the same piece of information. This have a profound effect on information diffusion: Firstly, most of the transmission takes place due to super-spreading events which would be considered extraord...

Iribarren, Jose Luis

2007-01-01

155

10 Security in RFID Networks and Communications  

E-print Network

a wire- less channel for communication, and can be read without line-of-sight, increasing the read whether these RFID tags pose any security risk. For example, consider an RFID tag affixed to clothing, this type of tag contains information such as the brand and model of the clothing. This type of information

Wu, Jie

156

Southwest Environmental Information Network  

NSDL National Science Digital Library

The Southwest Environmental Information Network (SEINet) is a series of linked databases and accompanying web software helpful in using those databases, which will be of interest to the environmental research community in Arizona, the Southwest, and elsewhere. SEINet allows users to locate, access, and work with a variety of data, including biological collections, ecological research data, GIS data, taxonomic information, bibliographies, and research protocols. Searchable databases include herbaria; pollen, fruit and seed collections; and mammal, bird, reptile, and amphibian collections. There is also a library of plant and lichen images; links to identification keys and species checklists from various research projects; information on NaviKey (a Java applet and application for accessing descriptive data); and Symbiota web tools (which integrate biological community knowledge and data in order to help identify plants).

157

Performance management of multiple access communication networks  

NASA Astrophysics Data System (ADS)

This paper focuses on conceptual design, development, and implementation of a performance management tool for computer communication networks to serve large-scale integrated systems. The objective is to improve the network performance in handling various types of messages by on-line adjustment of protocol parameters. The techniques of perturbation analysis of Discrete Event Dynamic Systems (DEDS), stochastic approximation (SA), and learning automata have been used in formulating the algorithm of performance management. The efficacy of the performance management tool has been demonstrated on a network testbed. The conceptual design presented in this paper offers a step forward to bridging the gap between management standards and users' demands for efficient network operations since most standards such as ISO (International Standards Organization) and IEEE address only the architecture, services, and interfaces for network management. The proposed concept of performance management can also be used as a general framework to assist design, operation, and management of various DEDS such as computer integrated manufacturing and battlefield C(sup 3) (Command, Control, and Communications).

Lee, Suk; Ray, Asok

1993-12-01

158

Position estimation of transceivers in communication networks  

SciTech Connect

This invention provides a system and method using wireless communication interfaces coupled with statistical processing of time-of-flight data to locate by position estimation unknown wireless receivers. Such an invention can be applied in sensor network applications, such as environmental monitoring of water in the soil or chemicals in the air where the position of the network nodes is deemed critical. Moreover, the present invention can be arranged to operate in areas where a Global Positioning System (GPS) is not available, such as inside buildings, caves, and tunnels.

Kent, Claudia A. (Pleasanton, CA); Dowla, Farid (Castro Valley, CA)

2008-06-03

159

An FPGA-based Torus Communication Network  

E-print Network

We describe the design and FPGA implementation of a 3D torus network (TNW) to provide nearest-neighbor communications between commodity multi-core processors. The aim of this project is to build up tightly interconnected and scalable parallel systems for scientific computing. The design includes the VHDL code to implement on latest FPGA devices a network processor, which can be accessed by the CPU through a PCIe interface and which controls the external PHYs of the physical links. Moreover, a Linux driver and a library implementing custom communication APIs are provided. The TNW has been successfully integrated in two recent parallel machine projects, QPACE and AuroraScience. We describe some details of the porting of the TNW for the AuroraScience system and report performance results.

Marcello Pivanti; Sebastiano Fabio Schifano; Hubert Simma

2011-02-11

160

EECE 569 -UBC ECE -Outline Outline-1 Mobile Communications Networks  

E-print Network

of wireless communications Cellular wireless networks 2G, 2.5G, 3G and 4G, ... cellular networks Mobility. Glisic, Advanced Wireless Networks: 4G Technologies, 2 ed. Wiley, 2009. #12;Outline-10 Course Materials

Pulfrey, David L.

161

Mitigating the Hospital Area Communication's Interference using Cognitive Radio Networks  

E-print Network

Mitigating the Hospital Area Communication's Interference using Cognitive Radio Networks Dramane to control the interferences. Cognitive Radio Networks (CRNs) seem to be suitable for delivering high. The Cognitive Radio Networks [1] (CRNs) have recently become the forefront of wireless research

Paris-Sud XI, Université de

162

Communication Networks from the Enron Email Corpus \\  

Microsoft Academic Search

The Enron email corpus is appealing to researchers because it represents a rich temporal record of internal communication\\u000a within a large, real-world organization facing a severe and survival-threatening crisis. We describe how we enhanced the original\\u000a corpus database and present findings from our investigation undertaken with a social network analytic perspective. We explore\\u000a the dynamics of the structure and properties

Jana Diesner; Terrill L. Frantz; Kathleen M. Carley

2005-01-01

163

Coding for spread-spectrum communications networks  

Microsoft Academic Search

The multiple-access capability of a frequency-hopp packet radio network is investigated from a coding point of view. The achievable region of code rate and channel traffic and the normalized throughput are considered as performance measures. We model the communication system from the modulator input to the demodulator output as an I-user interference channel, and evaluate the asymptotic performance of various

Bal G. Kim

1987-01-01

164

Generalized hypercube structures and hyperswitch communication network  

NASA Technical Reports Server (NTRS)

This paper discusses an ongoing study that uses a recent development in communication control technology to implement hybrid hypercube structures. These architectures are similar to binary hypercubes, but they also provide added connectivity between the processors. This added connectivity increases communication reliability while decreasing the latency of interprocessor message passing. Because these factors directly determine the speed that can be obtained by multiprocessor systems, these architectures are attractive for applications such as remote exploration and experimentation, where high performance and ultrareliability are required. This paper describes and enumerates these architectures and discusses how they can be implemented with a modified version of the hyperswitch communication network (HCN). The HCN is analyzed because it has three attractive features that enable these architectures to be effective: speed, fault tolerance, and the ability to pass multiple messages simultaneously through the same hyperswitch controller.

Young, Steven D.

1992-01-01

165

Cooperative Communication-Aware Spectrum Leasing in Cognitive Radio Networks  

Microsoft Academic Search

In this paper, we focus on the dynamic spectrum access of two infrastructure-based cognitive radio networks, primary network and secondary network, which are collocated with each other. To improve network performance of two networks, we propose a cooperative communication-aware spectrum leasing framework, in which, primary network leverages secondary users as cooperative relays, and decides the optimal strategy on the relay

Youwen Yi; Jin Zhang; Qian Zhang; Tao Jiang; Jietao Zhang

2010-01-01

166

Information Systems and Business Communication.  

ERIC Educational Resources Information Center

Intended to provide orientation about the integration of business communication, business systems, and the researching and teaching of business communication, this books offers articles on a variety of topics concerning business communication. Titles of the articles and their authors are as follows: (1) "Office Technology: Voice Store-and-Forward"…

Beswick, Raymond W., Ed.; Williams, Alfred B., Ed.

167

Community detection based on network communicability  

NASA Astrophysics Data System (ADS)

We propose a new method for detecting communities based on the concept of communicability between nodes in a complex network. This method, designated as N-ComBa K-means, uses a normalized version of the adjacency matrix to build the communicability matrix and then applies K-means clustering to find the communities in a graph. We analyze how this method performs for some pathological cases found in the analysis of the detection limit of communities and propose some possible solutions on the basis of the analysis of the ratio of local to global densities in graphs. We use four different quality criteria for detecting the best clustering and compare the new approach with the Girvan-Newman algorithm for the analysis of two "classical" networks: karate club and bottlenose dolphins. Finally, we analyze the more challenging case of homogeneous networks with community structure, for which the Girvan-Newman completely fails in detecting any clustering. The N-ComBa K-means approach performs very well in these situations and we applied it to detect the community structure in an international trade network of miscellaneous manufactures of metal having these characteristics. Some final remarks about the general philosophy of community detection are also discussed.

Estrada, Ernesto

2011-03-01

168

Geoscience Information Network  

NASA Astrophysics Data System (ADS)

Geological surveys in the USA have an estimated 2,000-3,000 databases that represent one of the largest, long- term information resources on the geology of the United States and collectively constitute a national geoscience data "backbone" for research and applications. An NSF-supported workshop in February, 2007, among representatives of the Association of American State Geologists (AASG) and the USGS, recommended that "the nation's geological surveys develop a national geoscience information framework that is distributed, interoperable, uses open source standards and common protocols, respects and acknowledges data ownership, fosters communities of practice to grow, and develops new web services and clients." The AASG and USGS have formally endorsed the workshop recommendations and formed a joint Steering Committee to pursue design and implementation of the Geoscience Information Network (GIN). GIN is taking a modular approach in assembling the network: 1. Agreement on open-source standards and common protocols through the use of Open Geospatial Consortium (OGC) standards. 2. A data exchange model utilizing the geoscience mark-up language GeoSciML, an OGC GML-based application. 3. A prototype data discovery tool (National Digital Catalogue - NDC) developing under the National Geological and Geophysical Data Preservation Program run by the USGS. 4. Data integration tools developed or planned by a number of independent projects. A broader NSF-sponsored workshop in March 2007 examined what direction the geoinformatics community in the US should take towards developing a National Geoinformatics System. The final report stated that, "It was clear that developing such a system should involve a partnership between academia, government, and industry that should be closely connected to the efforts of the U. S. Geological Survey and the state geological surveys..." The GIN is collaborating with 1-G Europe, a coalition of 27 European geological surveys in the OneGeology initiative that is designing a continental network comparable to GIN. GIN members are also heavily involved in the IUGS-CGI Interoperability Working Group, and the NDC project, further ensuring the network will have broad involvement, be globally connected, and be readily accessible.

Allison, M. L.; Gundersen, L. C.

2007-12-01

169

Structural changes in data communication in wireless sensor networks  

NASA Astrophysics Data System (ADS)

Wireless sensor networks are an important technology for making distributed autonomous measures in hostile or inaccessible environments. Among the challenges they pose, the way data travel among them is a relevant issue since their structure is quite dynamic. The operational topology of such devices can often be described by complex networks. In this work, we assess the variation of measures commonly employed in the complex networks literature applied to wireless sensor networks. Four data communication strategies were considered: geometric, random, small-world, and scale-free models, along with the shortest path length measure. The sensitivity of this measure was analyzed with respect to the following perturbations: insertion and removal of nodes in the geometric strategy; and insertion, removal and rewiring of links in the other models. The assessment was performed using the normalized Kullback-Leibler divergence and Hellinger distance quantifiers, both deriving from the Information Theory framework. The results reveal that the shortest path length is sensitive to perturbations.

da Silva Cabral, Raquel; Aquino, Andre L. L.; Frery, Alejandro C.; Rosso, Osvaldo A.; Ramírez, Jaime A.

2013-12-01

170

The Refugee Health Information Network  

Microsoft Academic Search

The Refugee Health Information Network is an electronic resource designed to make accessible culturally and linguistically appropriate health and medical information in order to improve health services for refugees and asylees. Much of this information will clearly be of value to immigrants as well. This is also a network designed to facilitate collaboration and sharing among state refugee health coordinators

Gale A. Dutcher; John C. Scott; Stacey J. Arnesen

2008-01-01

171

Analyzing the Dynamics of Communication in Online Social Networks  

NASA Astrophysics Data System (ADS)

This chapter deals with the analysis of interpersonal communication dynamics in online social networks and social media. Communication is central to the evolution of social systems. Today, the different online social sites feature variegated interactional affordances, ranging from blogging, micro-blogging, sharing media elements (i.e., image, video) as well as a rich set of social actions such as tagging, voting, commenting and so on. Consequently, these communication tools have begun to redefine the ways in which we exchange information or concepts, and how the media channels impact our online interactional behavior. Our central hypothesis is that such communication dynamics between individuals manifest themselves via two key aspects: the information or concept that is the content of communication, and the channel i.e., the media via which communication takes place. We present computational models and discuss large-scale quantitative observational studies for both these organizing ideas. First, we develop a computational framework to determine the "interestingness" property of conversations cented around rich media. Second, we present user models of diffusion of social actions and study the impact of homophily on the diffusion process. The outcome of this research is twofold. First, extensive empirical studies on datasets from YouTube have indicated that on rich media sites, the conversations that are deemed "interesting" appear to have consequential impact on the properties of the social network they are associated with: in terms of degree of participation of the individuals in future conversations, thematic diffusion as well as emergent cohesiveness in activity among the concerned participants in the network. Second, observational and computational studies on large social media datasets such as Twitter have indicated that diffusion of social actions in a network can be indicative of future information cascades. Besides, given a topic, these cascades are often a function of attribute homophily existent among the participants. We believe that this chapter can make significant contribution into a better understanding of how we communicate online and how it is redefining our collective sociological behavior.

de Choudhury, Munmun; Sundaram, Hari; John, Ajita; Seligmann, Doree Duncan

172

Personal Mobility in the ICEBERG Integrated Communication Network  

E-print Network

Personal Mobility in the ICEBERG Integrated Communication Network Bhaskaran Raman Randy H. Katz in the ICEBERG Integrated Communication Network Bhaskaran Raman Randy H. Katz Anthony D. Joseph fbhaskar communication services in a personalized, unified, and clean fashion across these devices. The Iceberg Project

Joseph, Anthony D.

173

Architecting Communication Network of Networks for Space System of Systems  

NASA Technical Reports Server (NTRS)

The National Aeronautics and Space Administration (NASA) and the Department of Defense (DoD) are planning Space System of Systems (SoS) to address the new challenges of space exploration, defense, communications, navigation, Earth observation, and science. In addition, these complex systems must provide interoperability, enhanced reliability, common interfaces, dynamic operations, and autonomy in system management. Both NASA and the DoD have chosen to meet the new demands with high data rate communication systems and space Internet technologies that bring Internet Protocols (IP), routers, servers, software, and interfaces to space networks to enable as much autonomous operation of those networks as possible. These technologies reduce the cost of operations and, with higher bandwidths, support the expected voice, video, and data needed to coordinate activities at each stage of an exploration mission. In this paper, we discuss, in a generic fashion, how the architectural approaches and processes are being developed and used for defining a hypothetical communication and navigation networks infrastructure to support lunar exploration. Examples are given of the products generated by the architecture development process.

Bhasin, Kul B.; Hayden, Jeffrey L.

2008-01-01

174

On cost-effective communication network designing  

E-print Network

How to efficiently design a communication network is a paramount task for network designing and engineering. It is, however, not a single objective optimization process as perceived by most previous researches, i.e., to maximize its transmission capacity, but a multi-objective optimization process, with lowering its cost to be another important objective. These two objectives are often contradictive in that optimizing one objective may deteriorate the other. After a deep investigation of the impact that network topology, node capability scheme and routing algorithm as well as their interplays have on the two objectives, this letter presents a systematic approach to achieve a cost-effective design by carefully choosing the three designing aspects. Only when routing algorithm and node capability scheme are elegantly chosen can BA-like scale-free networks have the potential of achieving good tradeoff between the two objectives. Random networks, on the other hand, have the built-in character for a cost-effective design, especially when other aspects cannot be determined beforehand.

Guoqiang Zhang

2009-10-12

175

Global Legal Information Network  

NSDL National Science Digital Library

Legal scholars and those with an interest in the law will definitely want to take a look at the Global Legal Information Network (GLIN) website. Here visitors can search official full text legal documents, including judicial decisions, legislation, and laws. The database is provided courtesy of the Law Library of the United States Congress, and it draws from countries from around the world who wish to provide access to their own legal documents. Some of the countries who participate in the program include Brazil, Costa Rica, Kuwait, Peru, and Romania. Visitors will find that the ways to search the database are extremely helpful. Options include searching by jurisdiction, publication date, subject terms, and language. The site is rounded out by a section that provides answers to frequently asked questions about using the database.

2005-01-01

176

Ubiquitous Interpersonal Communication Ad-Hoc Networks and the Internet  

E-print Network

Ubiquitous Interpersonal Communication over Ad-Hoc Networks and the Internet Edoardo Biagioni), and over ad-hoc and delay-tolerant networks composed of the mobile devices themselves. This network-limited broadcast and Delay Tolerant Networking (DTN) within the ad-hoc network. Each device has a policy

Biagioni, Edoardo S.

177

Information Communication Highways in the 1990s: An Analysis of Their Potential Impact on Library Automation.  

ERIC Educational Resources Information Center

Discussion of the potential effects of fiber optic-based communication technology on information networks and systems design highlights library automation. Topics discussed include computers and telecommunications systems, the importance of information in national economies, microcomputers, local area networks (LANs), national computer networks,…

Kibirige, Harry M.

1991-01-01

178

Delay Sensitive Communications over Cognitive Radio Networks  

E-print Network

Supporting the quality of service of unlicensed users in cognitive radio networks is very challenging, mainly due to dynamic resource availability because of the licensed users' activities. In this paper, we study the optimal admission control and channel allocation decisions in cognitive overlay networks in order to support delay sensitive communications of unlicensed users. We formulate it as a Markov decision process problem, and solve it by transforming the original formulation into a stochastic shortest path problem. We then propose a simple heuristic control policy, which includes a threshold-based admission control scheme and and a largest-delay-first channel allocation scheme, and prove the optimality of the largest-delay-first channel allocation scheme. We further propose an improved policy using the rollout algorithm. By comparing the performance of both proposed policies with the upper-bound of the maximum revenue, we show that our policies achieve close-to-optimal performance with low complexities...

Wang, Feng; Zhao, Yuping

2012-01-01

179

'The Tsukuba Network' as a new medium for promoting research communications in Tsukuba  

NASA Astrophysics Data System (ADS)

The Science and Technology Agency constructed a PC-based communication network system named 'The Tsukuba Network' as a new medium for promoting the research communication in, and with, the Tsukuba City. For about a year prior to full operation, a pilot system was operated with the cooperation of some monitoring users to gain skill and experience for managing the PC-based communication network. The main service functions of the system are : bulletin board service; electronic mail ; construction of, and access to, the databases involving research information in Tsukuba City ; electronic conference; common use of softwares ; connection to other communication networks ( e.g., university and local network). The host computer is a work station EWS4800 and the network processor is a personal computer PC-9801 . These two computers are connected with LAN.

Taguchi, Masamichi

180

Global Raptor Information Network  

NSDL National Science Digital Library

The Global Raptor Information Network includes newly compiled species accounts for 331 species of diurnal raptors (hawks, eagles, falcons, vultures). These are linked to homepages of raptor researchers from 66 countries, and the site also offers a searchable bibliographic database (with nearly 39,000 records) on birds of prey. Other features include a species database, which includes distributional information and conservation status for raptors in 260 countries and island groups, links to raptor organizations, hawkwatches, database resources, and homepages of over 200 ornithological journals. There is also a bulletin board with notices of upcoming raptor meetings, recent raptor news, and appeals for assistance. The site is maintained by The Peregrine Fund in Boise, Idaho in an effort to create a global community of raptor researchers and to make its research library, which contains one of the largest collections of ornithological references (now about 21,000 titles) in the world, accessible to researchers in any locality. A free PDF service is maintained to provide researchers in library-poor areas with access to the technical literature.

Fund, The P.

181

Child Rights Information Network  

NSDL National Science Digital Library

Established in 1995 and based in London, the Children's Rights Information Network (CRIN) uses the United Nations Convention on the Rights of the Child (CRC) as their inspiration. Visitors unfamiliar with the reasons for the need for a group that advocates for the rights of children should check out the "Issues" tab. The CRIN Quiz section is a good place for visitors to learn about some of the specifics of children's rights in various countries, such as the "African Committee on the Rights and the Welfare of the Child" from 15/03/2010 and "Child Rights and the United States" from 05/11/2008. There are quizzes on some specific issues that involve children, such as "Child Slavery" from 28/03/2007 and "Quiz on Children Affected by Armed Conflict" from 24/11/2006. The "Information By Country", which can be accessed on the left hand side of the homepage, features International Law, National Law, and Regional Law related to the country, as well as the "Latest Resources", which include such valuable guides as the "Human Rights Watch: Global Report 2010".

182

Personal Mobility in the ICEBERG Integrated Communication Network  

E-print Network

Personal Mobility in the ICEBERG Integrated Communication Network Bhaskaran Raman bhaskar communication services in a personalized, unified, and clean fashion across these devices. The Iceberg Project as defined by Iceberg are much richer than the corresponding concepts in traditional telephony

Raman, Bhaskaran

183

Assessment of communication protocols in the EPC Network - replacing textual SOAP and XML with binary google protocol buffers encoding  

Microsoft Academic Search

The diffusion of RFID technology continues using the Electronic Product Code (EPC) as unique identifier for physical objects. The EPC Network enables companies to share information about read events by defining EPC Information Services (EPCIS). The communication protocols in the EPC Network are defined to be XML and SOAP. We claim that a binary encoded communication protocol is more appropriate

Jiirgen Muller; Martin Lorenz; Felix Geller; Alexander Zeier; Hasso Plattner

2010-01-01

184

The International Coral Reef Information Network  

NSDL National Science Digital Library

This extensive site was originally created to support coral reef conservation by the International Coral Reef Initiative (ICRI). The site serves to provide general coral reef information, tools and resources, and a central coral reef communications and network hub. The site also provides a library which houses descriptions of brochures, books, videos and other items suitable for coral reef awareness and education efforts. Some publications are available for download directly from this site, while others are available for purchase.

International Coral Reef Action Network (ICRAN)

185

An Interdisciplinary Network Making Progress on Climate Change Communication  

NASA Astrophysics Data System (ADS)

Public understanding of climate change continues to lag far behind the scientific consensus not merely because the public lacks information, but because there is in fact too much complex and contradictory information available. Fortunately, we can now (1) build on careful empirical cognitive and social science research to understand what people already value, believe, and understand; and then (2) design and test strategies for translating complex science so that people can examine evidence, make well-informed inferences, and embrace science-based solutions. Informal science education institutions can help bridge the gap between climate scientists and the public. In the US, more than 1,500 informal science venues (science centers, museums, aquariums, zoos, nature centers, national parks, etc.) are visited annually by 61% of the population. Extensive research shows that these visitors are receptive to learning about climate change and trust these institutions as reliable sources. Ultimately, we need to take a strategic approach to the way climate change is communicated. An interdisciplinary approach is needed to bring together three key areas of expertise (as recommended by Pidgeon and Fischhoff, 2011): 1. Climate and decision science experts - who can summarize and explain what is known, characterize risks, and describe appropriate mitigation and adaptation strategies; 2. Social scientists - who can bring to bear research, theory, and best practices from cognitive, communication, knowledge acquisition, and social learning theory; and 3. Informal educators and program designers - who bring a practitioner perspective and can exponentially facilitate a learning process for additional interpreters. With support from an NSF CCEP Phase I grant, we have tested this approach, bringing together Interdisciplinary teams of colleagues for a five month "study circles" to develop skills to communicate climate change based on research in the social and cognitive sciences. In 2011, social scientists, Ph.D. students studying oceanography, and staff from more than 20 institutions that teach science to the public came together in these learning groups. Most participants were motivated to create new or revised training or public programs based on lessons learned together. The success of this program rests on a twofold approach that combines collaborative learning with a cognitive and social sciences research based approach to communications. The learning process facilitated trust and experimentation among co-learners to practice applications for communications that has continued beyond the study circle experience through the networks established during the process. Examples drawn from the study circle outputs suggest that this approach could have a transformative impact on informal science education on a broad scale. Ultimately, we envision informal science interpreters as "vectors" for effective science communication, ocean and climate scientists with enhanced communication skills, and increased public demand for explanation and dialogue about global issues.

Spitzer, W.; Anderson, J. C.; Bales, S.; Fraser, J.; Yoder, J. A.

2012-12-01

186

Disaster Information Network by Cognitive Radio LANs  

Microsoft Academic Search

In this paper, we introduce a mobile network for disaster communication network by combination of different wireless LANs and mobile network. Currently available wireless LANs such as IEEE802.11b,g,j,n, IEEE802.16, cellular network are combined with a mobile router and loaded on a car to build a cognitive radio LAN node. Using multiple mobile network nodes, a large disaster communication network is

Goshi Sato; Daisuke Asahizawa; Yasuhiro Kawano; Yoshitaka Shibata

2009-01-01

187

Cooperative UAV-Based Communications Backbone for Sensor Networks  

SciTech Connect

The objective of this project is to investigate the use of unmanned air vehicles (UAVs) as mobile, adaptive communications backbones for ground-based sensor networks. In this type of network, the UAVs provide communication connectivity to sensors that cannot communicate with each other because of terrain, distance, or other geographical constraints. In these situations, UAVs provide a vertical communication path for the sensors, thereby mitigating geographic obstacles often imposed on networks. With the proper use of UAVs, connectivity to a widely disbursed sensor network in rugged terrain is readily achieved. Our investigation has focused on networks where multiple cooperating UAVs are used to form a network backbone. The advantage of using multiple UAVs to form the network backbone is parallelization of sensor connectivity. Many widely spaced or isolated sensors can be connected to the network at once using this approach. In these networks, the UAVs logically partition the sensor network into sub-networks (subnets), with one UAV assigned per subnet. Partitioning the network into subnets allows the UAVs to service sensors in parallel thereby decreasing the sensor-to-network connectivity. A UAV services sensors in its subnet by flying a route (path) through the subnet, uplinking data collected by the sensors, and forwarding the data to a ground station. An additional advantage of using multiple UAVs in the network is that they provide redundancy in the communications backbone, so that the failure of a single UAV does not necessarily imply the loss of the network.

Roberts, R S

2001-10-07

188

Real-time communication in FDDI-based networks  

E-print Network

network with the synchronous transmission mode. This study addresses the issues in implementing real-time communications on an FDDI network using synchronous mode transmission, and guaranteeing the apphcation-to-application deadlines of multiple message...

Kumar, Amit Virendra

2012-06-07

189

Aquaculture Network Information Center  

NSDL National Science Digital Library

Given the declining schools of fish in many of the world's oceans, interest in aquaculture has grown exponentially in the past few years. The Aquaculture Network Information Center (ANIC) serves as an electronic gateway to thousands of online aquaculture-related resources, and is hosted by Purdue University and the University of Illinois through the Illinois - Indiana Sea Grant College Program. ANIC was started in 1994, and currently contains links to hundreds of aquaculture publications from around the globe, visual media (such as Power Point presentations), calendars of germane conferences and events, and specialty sections for species and production systems. From the ANIC home page, visitors may join discussion groups about aquaculture (organized by species), learn about different aquaculture cultivation systems, and peruse recent and archive publications from the relevant federal, state, and international agencies. For aquaculture neophytes, a FAQ section will answer ever quandary possible about the world of pond management, the perplexity of pond construction, and the inevitable debates surrounding which form of aquaculture production is most appropriate for different regions of the world.

190

Link search algorithms for a spread-spectrum mobile communication network with directive\\/adaptive antennas  

Microsoft Academic Search

A non-centralized fully distributed mobile communication network with directive or adaptive antennas is proposed. Every node uses directive or adaptive antennas for transmitting and receiving communication signals. The spatial and temporal synchronization of the transmitting and receiving antenna beams is accomplished by employing the Global Positioning System (GPS) information and a double-ended spatial search algorithm. This research focuses on the

Tien-Yow Liu; Robert A. Scholtz

1998-01-01

191

Computationally Private Information Retrieval with Polylogarithmic Communication  

Microsoft Academic Search

We present a single-database computationally private information retrieval scheme with poly- logarithmic communication complexity. Our construction is based on a new, but reasonable intractability assumption, which we call the -Hiding Assumption (HA): essentially the di-

Christian Cachin; Silvio Micali; Markus Stadler

1999-01-01

192

Information and Communication in Lean Product Development  

E-print Network

In this thesis, the implications and influences that information and communication impose on lean product development in general, as well as the development of a lean Product Development Value Stream Display (lean PDVSD) ...

Graebsch, Martin

193

Communicating health information to disadvantaged populations.  

PubMed

Interest in the communication of health information among disadvantaged populations has increased in recent years with the shift from a model of patient-provider communication to one of a more empowered healthcare consumer; with the use of new communication technologies that increase the number of channels through which health information may be accessed; and with the steadily increasing number of people without health insurance. Three separate research literatures contribute to our current understanding of this issue. In the medicine and public health literature, disparities in health access and outcomes among socioeconomic, ethnic, and racial groups are now well documented. In the information sciences literature, scholars note that on a continuum of health information behaviors, ranging from information avoidance and nonseeking to active seeking, nonseeking behaviors are associated with disadvantaged populations. In the communication literature, enthusiasm over the technology-driven growth of online health information seeking is tempered by evidence supporting the knowledge gap hypothesis, which indicates that as potential access to health information increases, systematic gaps in health knowledge also increase as groups with higher socioeconomic status acquire this information at a faster rate than those with lower socioeconomic status. A number of diverse strategies show promise in reducing information and health disparities, including those that focus on technology, such as programs to increase computer and Internet access, skills, and comprehension; those that focus on interpersonal communication, such as the community health worker model; and those that focus on mass media channels, such as entertainment education. PMID:20216358

Beacom, Amanda M; Newman, Sandra J

2010-01-01

194

A Hybrid Satellite-Terrestrial Approach to Aeronautical Communication Networks  

NASA Technical Reports Server (NTRS)

Rapid growth in air travel has been projected to continue for the foreseeable future. To maintain a safe and efficient national and global aviation system, significant advances in communications systems supporting aviation are required. Satellites will increasingly play a critical role in the aeronautical communications network. At the same time, current ground-based communications links, primarily very high frequency (VHF), will continue to be employed due to cost advantages and legacy issues. Hence a hybrid satellite-terrestrial network, or group of networks, will emerge. The increased complexity of future aeronautical communications networks dictates that system-level modeling be employed to obtain an optimal system fulfilling a majority of user needs. The NASA Glenn Research Center is investigating the current and potential future state of aeronautical communications, and is developing a simulation and modeling program to research future communications architectures for national and global aeronautical needs. This paper describes the primary requirements, the current infrastructure, and emerging trends of aeronautical communications, including a growing role for satellite communications. The need for a hybrid communications system architecture approach including both satellite and ground-based communications links is explained. Future aeronautical communication network topologies and key issues in simulation and modeling of future aeronautical communications systems are described.

Kerczewski, Robert J.; Chomos, Gerald J.; Griner, James H.; Mainger, Steven W.; Martzaklis, Konstantinos S.; Kachmar, Brian A.

2000-01-01

195

Communication Efficiency and Congestion of Signal Traffic in Large-Scale Brain Networks  

PubMed Central

The complex connectivity of the cerebral cortex suggests that inter-regional communication is a primary function. Using computational modeling, we show that anatomical connectivity may be a major determinant for global information flow in brain networks. A macaque brain network was implemented as a communication network in which signal units flowed between grey matter nodes along white matter paths. Compared to degree-matched surrogate networks, information flow on the macaque brain network was characterized by higher loss rates, faster transit times and lower throughput, suggesting that neural connectivity may be optimized for speed rather than fidelity. Much of global communication was mediated by a “rich club” of hub regions: a sub-graph comprised of high-degree nodes that are more densely interconnected with each other than predicted by chance. First, macaque communication patterns most closely resembled those observed for a synthetic rich club network, but were less similar to those seen in a synthetic small world network, suggesting that the former is a more fundamental feature of brain network topology. Second, rich club regions attracted the most signal traffic and likewise, connections between rich club regions carried more traffic than connections between non-rich club regions. Third, a number of rich club regions were significantly under-congested, suggesting that macaque connectivity actively shapes information flow, funneling traffic towards some nodes and away from others. Together, our results indicate a critical role of the rich club of hub nodes in dynamic aspects of global brain communication. PMID:24415931

Misic, Bratislav; Sporns, Olaf; McIntosh, Anthony R.

2014-01-01

196

Statistical characterizers of transport in communication networks  

NASA Astrophysics Data System (ADS)

We identify the statistical characterizers of congestion and decongestion for message transport in model communication lattices. These turn out to be the travel time distributions, which are Gaussian in the congested phase, and logarithmic normal in the decongested phase. Our results are demonstrated for two-dimensional lattices, such the Waxman graph, and for lattices with local clustering and geographic separations, gradient connections, as well as for a one-dimensional ring lattice with random assortative connections. The behavior of the distribution identifies the congested and decongested phase correctly for these distinct network topologies and decongestion strategies. The waiting time distributions of the systems also show identical signatures of the congested and decongested phases. The distributions are explained using a stochastic differential equation to model the transport.

Mukherjee, Satyam; Gupte, Neelima; Mukherjee, Gautam

2010-04-01

197

Statistical characterizers of transport in communication networks.  

PubMed

We identify the statistical characterizers of congestion and decongestion for message transport in model communication lattices. These turn out to be the travel time distributions, which are Gaussian in the congested phase, and logarithmic normal in the decongested phase. Our results are demonstrated for two-dimensional lattices, such the Waxman graph, and for lattices with local clustering and geographic separations, gradient connections, as well as for a one-dimensional ring lattice with random assortative connections. The behavior of the distribution identifies the congested and decongested phase correctly for these distinct network topologies and decongestion strategies. The waiting time distributions of the systems also show identical signatures of the congested and decongested phases. The distributions are explained using a stochastic differential equation to model the transport. PMID:20481788

Mukherjee, Satyam; Gupte, Neelima; Mukherjee, Gautam

2010-04-01

198

International Research Network in European Political Communications  

NSDL National Science Digital Library

EurPolCom was initially established in 2000, by Professor Paul Statham, and located at the University of Leeds. In 2007, it was re-launched as a 'network' which advances research in the fields of political communications, the public sphere and social movements and is now located at the University of Bristol. On their website visitors can learn more about this organization and their various research projects. In addition, there are a number of working papers available to the public including "Constitutionalism of the European Public Sphere" and "The Politics of Immigration and Asylum Policy in Western Europe" to name only a few. After getting acquainted, visitors may want to learn more about their grants and awards available as well as upcoming events. Lastly, a set of related links is provided for those interested in a specific aspect of the site.

199

Communication and Coordination in Wireless Sensor and Actor Networks  

E-print Network

Communication and Coordination in Wireless Sensor and Actor Networks Tommaso Melodia, Student. Akyildiz, Fellow, IEEE Abstract--In this paper, coordination and communication problems in Wireless Sensor and Actor Networks (WSANs) are jointly addressed in a unifying framework. A sensor-actor coordination model

Melodia, Tommaso

200

Interplant Communication of Tomato Plants through Underground Common Mycorrhizal Networks  

E-print Network

Interplant Communication of Tomato Plants through Underground Common Mycorrhizal Networks Yuan Yuan, plants can also communicate with each other through underground common mycorrhizal networks (CMNs movement and there is no evidence that defense signals can be exchanged through such mycorrhizal hyphal

Bruns, Tom

201

The analysis of network transmission method for welding robot information  

NASA Astrophysics Data System (ADS)

On the asis of User Datagram Protocol (UserDatagram Protocol, UDP), to do some improvement and design a welding robot network communication protocol (welding robot network communicate protocol: WRNCP), working on the fields of the transport layer and application layer of TCP / IP protocol. According to the characteristics of video data, to design the radio push-type (Broadcast Push Model, BPM) transmission method, improving the efficiency and stability of video transmission.and to designed the network information transmission system, used for real-time control of welding robot network.

Cheng, Weide; Zhang, Hua; Liu, Donghua; Wang, Hongbo

2011-12-01

202

The analysis of network transmission method for welding robot information  

NASA Astrophysics Data System (ADS)

On the asis of User Datagram Protocol (UserDatagram Protocol, UDP), to do some improvement and design a welding robot network communication protocol (welding robot network communicate protocol: WRNCP), working on the fields of the transport layer and application layer of TCP / IP protocol. According to the characteristics of video data, to design the radio push-type (Broadcast Push Model, BPM) transmission method, improving the efficiency and stability of video transmission.and to designed the network information transmission system, used for real-time control of welding robot network.

Cheng, Weide; Zhang, Hua; Liu, Donghua; Wang, Hongbo

2012-01-01

203

Whether Information Network Supplements Friendship Network  

E-print Network

Homophily is a significant mechanism for link prediction in complex network, of which principle describes that people with similar profiles or experiences tend to tie with each other. In a multi-relationship network, friendship among people has been utilized to reinforce similarity of taste for recommendation system whose basic idea is similar to homophily, yet how the taste inversely affects friendship prediction is little discussed. This paper contributes to address the issue by analyzing two benchmark datasets both including user's behavioral information of taste and friendship based on the principle of homophily. It can be found that the creation of friendship tightly associates with personal taste. Especially, the behavioral information of taste involving with popular objects is much more effective to improve the performance of friendship prediction. However, this result seems to be contradictory to the finding in [Q.M. Zhang, et al., PLoS ONE 8(2013)e62624] that the behavior information of taste involvi...

Miao, Lili; Nie, Da-Chen; Cai, Shi-Min

2014-01-01

204

Design Considerations of Fiber Optic Communication System for a Community Area Networks (CANs)  

Microsoft Academic Search

Now a days, a number of CANs have been launched in developed countries. Dissimilar to other telecommunication infrastructures, these networks are sponsored and financed by the local authority. The communication engineers have always dreamt of higher information bandwidth with low attenuation and cost. Thus they prefer optical fiber for network purposes as transmission medium and over the high bit rate

Masud Rana; Saiful Islam; Shariful Islam; D. M. Motiur Rahaman

205

Communication Inequalities and Public Health Implications of Adult Social Networking Site Use in the United States  

Microsoft Academic Search

Social media, and specifically social networking sites (SNSs), are emerging as an important platform for communication and health information exchange. Yet, despite the increase in popularity and use, only a limited number of empirical studies document which segments of the adult population are and are not using social networking sites and with what, if any, affect on health. The purpose

Emily Z. Kontos; Karen M. Emmons; Elaine Puleo; K. Viswanath

2010-01-01

206

CollegeofCommunicationandInformation CJT Communication, Journalism, Telecommunications  

E-print Network

IN INTERNATIONAL/INTERCULTURAL COMMUNICATION. (3) Examines important issues in communication from a globalCollegeofCommunicationandInformation CJT Communication, Journalism, Telecommunications (Graduate Bulletin 1 CJT 601 PROSEMINAR IN COMMUNICATION. (3) Introduction to graduate study; theory and systems

MacAdam, Keith

207

Opportunistic Information Retrieval in Sparsely Connected Ad Hoc Networks  

NASA Astrophysics Data System (ADS)

With the advancement in technology, many users carry wireless computing de-vices e.g., PDAs, cell-phones etc. Such devices can form mobile ad hoc networks and communicate with one another via the help of intermediate nodes. Such ad hoc networks are very useful in several scenarios e.g., battlefield operations, vehicular ad hoc networks and disaster response scenarios. The ability to access important information in these scenarios is highly critical. Many ad hoc routing schemes have been designed for ad hoc networks but such routing schemes are not useful in some challenging network scenarios where the nodes have intermittent connectivity and suffer frequent partitioning. Recently, disruption tolerant network technologies [5, 12] have been proposed to allow nodes in such extreme network-ing environment to communicate with one another. Several DTN routing schemes [4, 14] have been proposed.

Chuah, Mooi-Choo; Han, Jian-Bin

208

Illinois Library and Information Network.  

ERIC Educational Resources Information Center

This theme issue discusses the Illinois Library and Information Network (ILLINET). Topics addressed include network components, the interlibrary loan code, the resource sharing union catalog, the OCLC users' group, OCLC's EPIC service, access to indexing services, SILO (Serials of Illinois Libraries Online) members, and excerpts from the…

Allen, Barbara McFadden, Ed.; And Others

1993-01-01

209

A power line communication network infrastructure for the smart home  

Microsoft Academic Search

Low voltage electrical wiring has largely been dismissed as too noisy and unpredictable to support high-speed communication signals. Advances in communication and modulation methodologies as well as in adaptive digital signal processing and error detection and correction have spawned novel protocols capable of supporting power line communication networks at speeds comparable to wired LANs. We motivate the use of power

Yu-Ju Lin; H. A. Latchman; Minkyu Lee; S. Katar

2002-01-01

210

Communication Performance in Network-on-Chips Axel Jantsch  

E-print Network

August 2003 #12;Stringent Summer School, ¨Orebro, August 2003 Communication Performance In NoCs - 1 School, ¨Orebro, August 2003 Communication Performance In NoCs - 2 Introduction Interconnection Network of the message over time A. Jantsch, KTH #12;Stringent Summer School, ¨Orebro, August 2003 Communication

Jantsch, Axel

211

Information security in networked supply chains: impact of network vulnerability and supply chain integration on incentives to invest  

Microsoft Academic Search

Recent supply chain reengineering efforts have focused on integrating firms’ production, inventory and replenishment activities\\u000a with the help of communication networks. While communication networks and supply chain integration facilitate optimization\\u000a of traditional supply chain functions, they also exacerbate the information security risk: communication networks propagate\\u000a security breaches from one firm to another, and supply chain integration causes breach on one

Tridib Bandyopadhyay; Varghese Jacob; Srinivasan Raghunathan

2010-01-01

212

Personal communication in traditional cellular networks  

NASA Astrophysics Data System (ADS)

The purpose of this paper is to describe the flow of calls through the mobile network as it applies to the operation of Basic and Enhanced Services. Included in the discussion is the overall network layout, the physical connections between the network entities, and the signaling protocols which allow the entities to be integrated. The specific functionality of the applications and services are not detailed as the specific implementation varies from vendor to vendor and from service provider to service provider. The Enhanced Services Platform is installed in a service providers network in order to offer mobile subscribers services and applications which would otherwise not be available. The service providers' objective is to increase revenue/subscriber, increase subscriber loyalty/decrease churn, and build competitive advantages through differentiation. The services provided on the Enhanced Services platform can be viewed as either Basic or Enhanced. For the purpose of this paper, Basic Services refers to Numeric Paging, Call Answering, and Voice Messaging while Enhanced Services refers to FAX Messaging, One Number Service, Voice Dialing and other Voice Recognition applications, Information Services including FAX on Demand, and Automated Call Routing.

Neuer, Ellwood I.

1996-01-01

213

Citations among communication journals and other disciplines: a network analysis  

Microsoft Academic Search

This article describes the results of a network analysis based on the citation among Communication journals and those academic\\u000a disciplines that are cited by those journals labeled as “Communication” by the Web of Science. The results indicate that the\\u000a journals indexed solely as Communication rather than those also tagged as another social science are more central in the citation\\u000a network.

George A. Barnett; Catherine Huh; Youngju Kim; Han Woo Park

214

Distributed communications and control network for robotic mining  

NASA Technical Reports Server (NTRS)

The application of robotics to coal mining machines is one approach pursued to increase productivity while providing enhanced safety for the coal miner. Toward that end, a network composed of microcontrollers, computers, expert systems, real time operating systems, and a variety of program languages are being integrated that will act as the backbone for intelligent machine operation. Actual mining machines, including a few customized ones, have been given telerobotic semiautonomous capabilities by applying the described network. Control devices, intelligent sensors and computers onboard these machines are showing promise of achieving improved mining productivity and safety benefits. Current research using these machines involves navigation, multiple machine interaction, machine diagnostics, mineral detection, and graphical machine representation. Guidance sensors and systems employed include: sonar, laser rangers, gyroscopes, magnetometers, clinometers, and accelerometers. Information on the network of hardware/software and its implementation on mining machines are presented. Anticipated coal production operations using the network are discussed. A parallelism is also drawn between the direction of present day underground coal mining research to how the lunar soil (regolith) may be mined. A conceptual lunar mining operation that employs a distributed communication and control network is detailed.

Schiffbauer, William H.

1989-01-01

215

[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

216

Medical information networking and standardization  

Microsoft Academic Search

There are few environments that generate and manage as much information as the hospital. Although computers are used extensively\\u000a to manage this information, their application has been opportunistic rather than strategic. This has led to a multi-vendor\\u000a information processing environment in many hospitals.\\u000a \\u000a Hospitals today have financial systems, order-entry communication systems, ADT systems, and clinical systems such as laboratory,\\u000a pharmacy,

Ben L. Holmes

1987-01-01

217

Information flow in interaction networks.  

PubMed

Interaction networks, consisting of agents linked by their interactions, are ubiquitous across many disciplines of modern science. Many methods of analysis of interaction networks have been proposed, mainly concentrating on node degree distribution or aiming to discover clusters of agents that are very strongly connected between themselves. These methods are principally based on graph-theory or machine learning. We present a mathematically simple formalism for modelling context-specific information propagation in interaction networks based on random walks. The context is provided by selection of sources and destinations of information and by use of potential functions that direct the flow towards the destinations. We also use the concept of dissipation to model the aging of information as it diffuses from its source. Using examples from yeast protein-protein interaction networks and some of the histone acetyltransferases involved in control of transcription, we demonstrate the utility of the concepts and the mathematical constructs introduced in this paper. PMID:17985991

Stojmirovi?, Aleksandar; Yu, Yi-Kuo

2007-10-01

218

Essays on social networks and information worker productivity by Lynn Wu.  

E-print Network

In this thesis, I examine how information, information technology, and social networks affect information worker productivity. The work is divided into three essays based on tracking detailed communication patterns of ...

Wu, Lynn, 1981-

2011-01-01

219

Local Data Communications Network for the Wilford Hall USAF Medical Center  

PubMed Central

Data Communication technology has progressed to the point that dissimilar computer systems conforming to a common communications protocol can effectively communicate with each other. Until recently this technology has been used in networks that cover a large geographic area. The requirement for local networks is currently coming into focus. Data automation support for the Wilford Hall USAF Medical Center (WHMC) will be provided by off-the-shelf systems under the Tri-Service Medical Information System (TRIMIS) program. A local network (cable bus) is one way to effectively interface these dissimilar computer systems. The MITRI Corporation is functioning as systems engineer to install a cable bus at WHMC. The need for local data communication networks is increasing, and the cable bus offers a potentially effective method to interface multiple dissimilar computers on a cost effective basis.

Jackson, Thames F.; Workman, Billy J.

1980-01-01

220

NETWORKING AND INFORMATIONAL INTERVIEWING  

E-print Network

Networking is the process of building relationships and alliances. It is a powerful tool in beginning as well: Relatives: Parents, siblings, aunts and uncles, extended family. Friends and Acquaintances: From high at home and in Binghamton. Friends of Parents: Both locally and nationally. Parents of Friends: They can

Suzuki, Masatsugu

221

New communication network protocol for a data acquisition system  

Microsoft Academic Search

An event builder based on communication networks has been used in high-energy physics experiments, and various networks have been adopted, for example, IEEE 802.3 (Ethernet), asynchronous transfer mode (ATM), and so on. In particular, Ethernet is widely used because its infrastructure is very cost effective. Many systems adopt standard protocols that are designed for a general network. However, in the

Tomohisa Uchida; Hirofumi Fujii; Yasushi Nagasaka; Manobu Tanaka

2006-01-01

222

Social Networks in Health Care: Communication, collaboration and insights  

E-print Network

Social Networks in Health Care: Communication, collaboration and insights Foreword At Chirp and explore its current and potential impacts on the health care industry. We believe that social networking and leverage other consumers' knowledge before making health care decisions.3 Social networks hold considerable

Klein, Ophir

223

Environmental-friendly underwater acoustic communications and networks  

E-print Network

Environmental-friendly underwater acoustic communications and networks S.M. Jesus, LARSys and UAN.siplab.fct.ualg.pt September 14, 2012 S.M. Jesus, LARSys and UAN Environmental-friendly ucomms and networks #12;Motivation.M. Jesus, LARSys and UAN Environmental-friendly ucomms and networks #12;The environmental challenge (from

Jesus, Sérgio M.

224

Low power radio communication platform for wireless sensor network  

Microsoft Academic Search

Wireless sensor networks are predicted to be the most versatile, popular and useful technology in the near future. A large number of applications are targeted which will hugely benefit from a network of tiny computers with few sensors, radio communication platform, intelligent networking and controller programs. Few of these applications which look very attractive at this point of time are

R. Dutta; M. J. Bentum; Zee van der R. A. R; A. B. J. Kokkeler

2009-01-01

225

A hybrid wireless network enhanced with multihopping for emergency communications  

Microsoft Academic Search

This paper proposes a hybrid wireless network scheme enhanced with ad hoc networking for disaster damage assessment and emergency communications. The network aims to maintain the connection between a base station (BS) and nodes by way of multihopping. In the event that a direct link between BS and a node is disconnected, the node switches modes from cellular to ad

Takahiro Fujiwara; Noboru Iida; Takashi Watanabe

2004-01-01

226

TYMNET - A tutorial survey of a computer communications network  

Microsoft Academic Search

Describes the special features of TYMNET, a computer communications network developed in 1970 by Tymshare, Inc., of Cupertino, CA. Although originally developed for time-shared purposes, TYMNET has taken on a network function as well, much like the GE network [I]. In addition to providing connection to its own computer systems for interactive processing, remote job entry (RJE), and other user

M. Schwartz

1976-01-01

227

A Semantic Network Analysis of the International Communication Association  

Microsoft Academic Search

This article examines the structure of the International Communication Association (ICA) through semantic network analysis. Semantic network analysis examines the relationships among a system's components based on the shared meanings of symbols. Galileo analysis and Quadratic Analysis Procedure revealed that the semantic network for ICA based on paper titles presented to its divisions and interest groups at its 2992 conference

MARYA L. DOERFEL; GEORGE A. BARNETT

1999-01-01

228

A novel impulse radio network for tactical military wireless communications  

Microsoft Academic Search

Two of the major concerns in tactical military wireless communication networks are covertness and throughput. Impulse radio is an ultra-wideband code division multiple access (UWB-CDMA) technique being considered as the physical layer for future networks. Impulse radio exhibits low power spectral density and relatively high immunity to fading but suffers from relatively long acquisition times. In traditional packet radio networks

Santosh S. Kolenchery; J. K. Townsend; J. A. Freebersyser

1998-01-01

229

77 FR 21996 - Certain Equipment for Communications Networks, Including Switches, Routers, Gateways, Bridges...  

Federal Register 2010, 2011, 2012, 2013

...Equipment for Communications Networks, Including Switches, Routers, Gateways, Bridges, Wireless Access Points, Cable Modems...equipment for communications networks, including switches, routers, gateways, bridges, wireless access points, cable...

2012-04-12

230

Evaluations of gestural animations to convey feelings in asynchronous network communication  

Microsoft Academic Search

The paper deals with nonverbal communication in asynchronous networks. It is well known that nonverbal communication plays an important role in interpersonal communication. However, nonverbal communication has not been used in traditional character based network communication until now, yet the need for conveying feelings has increased. Due to the development of multimedia networks, it is thought that nonverbal communication can

Tomoo Inoue; Ken-ichi Okada; Y. Matsushita

1995-01-01

231

Statistically validated mobile communication networks: Evolution of motifs in European and Chinese data  

E-print Network

Big data open up unprecedented opportunities to investigate complex systems including the society. In particular, communication data serve as major sources for computational social sciences but they have to be cleaned and filtered as they may contain spurious information due to recording errors as well as interactions, like commercial and marketing activities, not directly related to the social network. The network constructed from communication data can only be considered as a proxy for the network of social relationships. Here we apply a systematic method, based on multiple hypothesis testing, to statistically validate the links and then construct the corresponding Bonferroni network, generalized to the directed case. We study two large datasets of mobile phone records, one from Europe and the other from China. For both datasets we compare the raw data networks with the corresponding Bonferroni networks and point out significant differences in the structures and in the basic network measures. We show eviden...

Li, Ming-Xia; Jiang, Zhi-Qiang; Kaski, Kimmo; Kertész, Janos; Miccichè, Salvatore; Tumminello, Michele; Zhou, Wei-Xing; Mantegna, Rosario N

2014-01-01

232

Facilitating networks of information.  

PubMed Central

In this paper we describe an approach to respond to a request for information with the identification and location of the appropriate person as a source of information for answering the question. The expertise of a person is characterized using a weighted profile that has been derived from a series of documents describing the expert's activities. Having these profiles, requests for information can be matched with these profiles. The best matches correspond with the people that are experts for providing information on the request. PMID:11080008

van Mulligen, E. M.; Diwersy, M.; Schmidt, M.; Buurman, H.; Mons, B.

2000-01-01

233

Statistically validated mobile communication networks: the evolution of motifs in European and Chinese data  

NASA Astrophysics Data System (ADS)

Big data open up unprecedented opportunities for investigating complex systems, including society. In particular, communication data serve as major sources for computational social sciences, but they have to be cleaned and filtered as they may contain spurious information due to recording errors as well as interactions, like commercial and marketing activities, not directly related to the social network. The network constructed from communication data can only be considered as a proxy for the network of social relationships. Here we apply a systematic method, based on multiple-hypothesis testing, to statistically validate the links and then construct the corresponding Bonferroni network, generalized to the directed case. We study two large datasets of mobile phone records, one from Europe and the other from China. For both datasets we compare the raw data networks with the corresponding Bonferroni networks and point out significant differences in the structures and in the basic network measures. We show evidence that the Bonferroni network provides a better proxy for the network of social interactions than the original one. Using the filtered networks, we investigated the statistics and temporal evolution of small directed 3-motifs and concluded that closed communication triads have a formation time scale, which is quite fast and typically intraday. We also find that open communication triads preferentially evolve into other open triads with a higher fraction of reciprocated calls. These stylized facts were observed for both datasets.

Li, Ming-Xia; Palchykov, Vasyl; Jiang, Zhi-Qiang; Kaski, Kimmo; Kertész, János; Miccichè, Salvatore; Tumminello, Michele; Zhou, Wei-Xing; Mantegna, Rosario N.

2014-08-01

234

Models, Entropy and Information of Temporal Social Networks  

NASA Astrophysics Data System (ADS)

Temporal social networks are characterized by heterogeneous duration of contacts, which can either follow a power-law distribution, such as in face-to-face interactions, or a Weibull distribution, such as in mobile-phone communication. Here we model the dynamics of face-to-face interaction and mobile phone communication by a reinforcement dynamics, which explains the data observed in these different types of social interactions. We quantify the information encoded in the dynamics of these networks by the entropy of temporal networks. Finally, we show evidence that human dynamics is able to modulate the information present in social network dynamics when it follows circadian rhythms and when it is interfacing with a new technology such as the mobile-phone communication technology.

Zhao, Kun; Karsai, Márton; Bianconi, Ginestra

235

Molecular Communication: Modeling Noise Effects on Information Rate  

Microsoft Academic Search

Molecular communication is a new paradigm for communication between biological nanomachines over a nano- and microscale range. As biological nanomachines (or nanomachines in short) are too small and simple to communicate through traditional communication mechanisms (e.g., through sending and receiving of radio or infrared signals), molecular communication provides a mechanism for a nanomachine (i.e., a sender) to communicate information by

Michael John Moore; Tatsuya Suda; Kazuhiro Oiwa

2009-01-01

236

(CICT) Computing, Information, and Communications Technology Overview  

NASA Technical Reports Server (NTRS)

The goal of the Computing, Information, and Communications Technology (CICT) program is to enable NASA's Scientific Research, Space Exploration, and Aerospace Technology Missions with greater mission assurance, for less cost, with increased science return through the development and use of advanced computing, information and communications technologies. This viewgraph presentation includes diagrams of how the political guidance behind CICT is structured. The presentation profiles each part of the NASA Mission in detail, and relates the Mission to the activities of CICT. CICT's Integrated Capability Goal is illustrated, and hypothetical missions which could be enabled by CICT are profiled. CICT technology development is profiled.

VanDalsem, William R.

2003-01-01

237

HOW LOCALITY, FREQUENCY OF COMMUNICATION AND INTERNET USAGE AFFECT MODES OF COMMUNICATION WITHIN CORE SOCIAL NETWORKS  

Microsoft Academic Search

The number of ways that people communicate with their social networks has changed dramatically in the last 50 years. Traditionally, the local community was the basis for people's social interactions; most of people's closest friends resided locally and face-to-face communication was the predominant mode of communication. Yet, today face-to-face meetings are no longer the primary way to communicate as one

Michael J. Stern

2008-01-01

238

Automatic Generation of Social Network Data from Electronic-Mail Communications  

Microsoft Academic Search

Most organizations have formal and informal elements. Formal structures are usually documented in organizational charts showing chain of command, levels of authority, and personnel resources. The actual effectiveness of the organization or specific ind ividuals may actually depend on informal structures and internal communication networks. These are by definition personality-dependent and may provide significant insight into how work actually gets

Jason Yee; Robert F. Mills; Gilbert L. Peterson; Summer E. Bartczak

239

Child Rights Information Network Newsletter, 2000-2002.  

ERIC Educational Resources Information Center

These five newsletter issues communicate activities of the Child Rights Information Network (CRIN) and report on information resources and world-wide activities concerning children and child rights. The March 2000 issue focuses on children's right to education, assessing the matter form a range of differing perspectives, at international and…

Khan, Andrea, Ed.; Greenwood, Laura, Ed.

240

Medical information metropolitan area network  

NASA Astrophysics Data System (ADS)

A joint project by Shands Hospital, the College of Medicine at the University of Florida, and the Gainesville Regional Utilities (GRU) has produced the design and partial completion of a comprehensive Metropolitan Area Network (MAN). The purpose of this MAN is to supply an integrated medical information network to a number of remote clinical sites both existing and planned. The joint cooperation with GRU will allow the replacement of the current power distribution intercommunications with reliable high speed optical paths.

Frost, Meryll M.; Brown, Rich; Honeyman-Buck, Janice C.; Staab, Edward V.

1994-05-01

241

Information Evolution in Social Networks  

E-print Network

Social networks readily transmit information, albeit with less than perfect fidelity. We present a large-scale measurement of this imperfect information copying mechanism by examining the dissemination and evolution of thousands of memes, collectively replicated hundreds of millions of times in the online social network Facebook. The information undergoes an evolutionary process that exhibits several regularities. A meme's mutation rate characterizes the population distribution of its variants, in accordance with the Yule process. Variants further apart in the diffusion cascade have greater edit distance, as would be expected in an iterative, imperfect replication process. Some text sequences can confer a replicative advantage; these sequences are abundant and transfer "laterally" between different memes. Subpopulations of the social network can preferentially transmit a specific variant of a meme if the variant matches their beliefs or culture. Understanding the mechanism driving change in diffusing informat...

Adamic, Lada A; Adar, Eytan; Ng, Pauline C

2014-01-01

242

Space Station Information System requirements for integrated communications  

NASA Technical Reports Server (NTRS)

Space Station Information System (SSIS) requirements for integrated end-to-end communications are presented. The SSIS is defined as the integrated set of space and ground data and information systems and networks which will provide required data services to the Space Station flight crew, ground operations personnel, and customer communities. This model is based on the International Standards Organization (ISO) layered model for Open System Interconnection (OSI). These SSIS requirements include grades of service, priority classifications, systems management, flow control, bandwidth allocation, and standard SSIS data services.

Marker, W.; Whitelaw, V.; Muratore, J.; Bigham, J., Jr.

1987-01-01

243

TYMNET: a terminal oriented communication network  

Microsoft Academic Search

The past few years have seen many applications of the mini-computer in digital communications. They have been used as interfaces to larger computers. They have been used as terminal drivers and data multiplexors. They have been used to connect computer centers for intercomputer communication. TYMNET* is a communication net that encompasses all of these features at relatively low cost.

La Roy Tymes

1971-01-01

244

Epidemic and information co-spreading in adaptive social networks  

NASA Astrophysics Data System (ADS)

We model simultaneous evolution of an epidemic and information about the epidemic on an adaptive social network. The classical Susceptible-Infectious-Susceptible (SIS) model is extended. Susceptible and infectious nodes are each divided into informed and uninformed types. Informed nodes affect the network structure by rewiring their network connections adaptively to avoid disease exposure. The impacts of mass media information and communication on the disease spreading and network structure are explored, and stochastic simulations are compared with a moment closure approximation. When the rewiring rate is high, the infection and information levels of the population show periodic oscillations for certain ranges of contact rate, and the moment closure approximation predicts similar dynamics. The epidemic threshold in the presence of rewiring and information is considered. Our results indicate that information can play a significant role in minimizing disease spread.

Long, Yunhan

2012-02-01

245

10 CFR 75.12 - Communication of information to IAEA.  

Code of Federal Regulations, 2010 CFR

...false Communication of information to IAEA. 75.12 Section 75.12 Energy...NUCLEAR MATERIAL-IMPLEMENTATION OF US/IAEA AGREEMENT Facility and Location Information...12 Communication of information to IAEA. (a) Except as otherwise...

2010-01-01

246

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

247

Power-law behavior in complex organizational communication networks during crisis  

NASA Astrophysics Data System (ADS)

Communication networks can be described as patterns of contacts which are created due to the flow of messages and information shared among participating actors. Contemporary organizations are now commonly viewed as dynamic systems of adaptation and evolution containing several parts, which interact with one another both in internal and in external environment. Although there is limited consensus among researchers on the precise definition of organizational crisis, there is evidence of shared meaning: crisis produces individual crisis, crisis can be associated with positive or negative conditions, crises can be situations having been precipitated quickly or suddenly or situations that have developed over time and are predictable etc. In this research, we study the power-law behavior of an organizational email communication network during crisis from complexity perspective. Power law simply describes that, the probability that a randomly selected node has k links (i.e. degree k) follows P(k)?k, where ? is the degree exponent. We used social network analysis tools and techniques to analyze the email communication dataset. We tested two propositions: (1) as organization goes through crisis, a few actors, who are prominent or more active, will become central, and (2) the daily communication network as well as the actors in the communication network exhibit power-law behavior. Our preliminary results support these two propositions. The outcome of this study may provide significant advancement in exploring organizational communication network behavior during crisis.

Uddin, Shahadat; Murshed, Shahriar Tanvir Hasan; Hossain, Liaquat

2011-08-01

248

Information, entropy and fidelity in visual communication  

NASA Technical Reports Server (NTRS)

This paper presents an assessment of visual communication that integrates the critical limiting factors of image gathering and display with the digital processing that is used to code and restore images. The approach focuses on two mathematical criteria, information and fidelity, and on their relationships to the entropy of the encoded data and to the visual quality of the restored image.

Huck, Friedrich O.; Fales, Carl L.; Alter-Gartenberg, Rachel; Rahman, Zia-Ur

1992-01-01

249

How information systems communicate as documents  

E-print Network

the mechanism of voice may work to persuasively communicate a point of view on the materials being collected and described by the information system. Design/methodology/approach ­ The paper synthesizes a conceptual is shown to function as a persuasive element by enabling identification, the rhetorical construct defined

Feinberg, Melanie

250

SCHOOL LEADERSHIP AND INFORMATION COMMUNICATION TECHNOLOGY  

Microsoft Academic Search

Leadership is an important component in guiding the teaching-learning process. Principal as school leaders have a major responsibility for initiating and implementing school change through the use of Information and Communication Technology (ICT) and can facilitate complex decision to integrate it into learning, teaching and school administration. Hence, educational leaders must understand, promote and implement the notion that technology integration

Mojgan AFSHARI; Kamariah Abu BAKAR; Wong Su LUAN; Bahaman Abu SAMAH; Foo Say FOOI

2008-01-01

251

Information and Communications Technologies Center Video Library  

NSDL National Science Digital Library

The Information and Communications Technologies Center (ICT) presents this collection of useful videos. Most of the clips are from conferences such as the 2010 CTC Winter Retreat and feature talks given at the conferences. Several other clips involve discussions of ICT academics and technology. The clips vary in length.

2011-08-09

252

NEW INFORMATION COMMUNICATION TECHNOLOGIES AND GRASSROOTS MOBILIZATION  

Microsoft Academic Search

In much of the recent literature on contemporary social movements there is call for a re-conceptualization of the definition and understanding of political struggle given the impact of new emerging information communication technologies (ICTs), and the Internet in particular, on social movement organizing, contentious politics, and the electoral political process. This paper undertakes an analysis of MoveOn within a critical

Victoria Carty

2010-01-01

253

A cooperative communication protocol for wireless ad-hoc networks  

E-print Network

This thesis presents the design and implementation of a communication protocol that utilizes local cooperation among nodes to efficiently transfer data. Multi-hop routing in ad-hoc wireless networks realizes some scalability ...

Silber, Jeremy I. (Jeremy Isaac), 1980-

2002-01-01

254

Computational Intelligence in Multimedia Networking and Communications: Trends and  

E-print Network

Computational Intelligence in Multimedia Networking and Communications: Trends and Future multimedia researchers in recent times have developed computational intelligence (CI) based methods. From these applications, it appears that the various computa- tional intelligence frameworks

Guturu, Parthasarathy

255

Scaling behaviors in the communication network between cities  

E-print Network

Researchers have been unable to predict the large-scale features of aggregate social networks. We analyze the anonymous communications patterns of 2.5 million customers of a Belgian mobile phone operator. With these ...

Ratti, Carlo

256

Predictive Compensation for Communication Outages in Networked Control Systems  

E-print Network

Predictive Compensation for Communication Outages in Networked Control Systems Erik Henriksson Henrik Sandberg Karl Henrik Johansson Abstract-- A predictive outage compensator co for Strategic Research. E. Henriksson, H. Sandberg and K. H. Johansson are with the AC- CESS Linnaeus Center

Johansson, Karl Henrik

257

Light Communications, Inc. Job Title: Network and Software Applications Specialist  

E-print Network

Design and Implementation, Building Relationships, Resolving Conflict, Project Management, ProjectLight Communications, Inc. Job Title: Network and Software Applications Specialist Position Type conflict; developing and implementing documentation requirements for problem resolution. Improves quality

Ravikumar, B.

258

Anomaly Detection Approaches for Communication Networks  

Microsoft Academic Search

\\u000a In recent years, network anomaly detection has become an important area for both commercial interests as well as academic\\u000a research. Applications of anomaly detection typically stem from the perspectives of network monitoring and network security.\\u000a In network monitoring, a service provider is often interested in capturing such network characteristics as heavy flows, flow\\u000a size distributions, and the number of distinct

Marina Thottan; Guanglei Liu; Chuanyi Ji

2010-01-01

259

Providing ordered message delivery in communication network systems  

E-print Network

PROVIDING ORDERED MESSAGE DELIVERY IN COMMUNICATION NETWORK SYSTEMS A Thesis by JULI0 A. RIVERA-HERNANDEZ Submitted to the Oflice of Graduate Studies of Texas AkM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1995 Major Subject: Computer Science PROVIDING ORDERED MESSAGE DELIVERY IN COMMUNICATION NETWORK SYSTEMS A Thesis by JULIO A. RIVERA-HERNANDEZ Submitted to Texas ARM University in partial fulfillment of the requirements for the degree...

Rivera-Hernandez, Julio A

2012-06-07

260

Finding Quasi-Optimal Network Topologies for Information Transmission in Active Networks  

PubMed Central

This work clarifies the relation between network circuit (topology) and behaviour (information transmission and synchronization) in active networks, e.g. neural networks. As an application, we show how one can find network topologies that are able to transmit a large amount of information, possess a large number of communication channels, and are robust under large variations of the network coupling configuration. This theoretical approach is general and does not depend on the particular dynamic of the elements forming the network, since the network topology can be determined by finding a Laplacian matrix (the matrix that describes the connections and the coupling strengths among the elements) whose eigenvalues satisfy some special conditions. To illustrate our ideas and theoretical approaches, we use neural networks of electrically connected chaotic Hindmarsh-Rose neurons. PMID:18941516

Baptista, Murilo S.; de Carvalho, Josue X.; Hussein, Mahir S.

2008-01-01

261

Extensible Networked Information Retrieval  

E-print Network

ves the precision of the index, because summarizers carefully select keywords to reflect a file's contents. Finally, the index size is reduced (by an order of magnitude [1]), because Essence extracts fewer keywords on average than full-text. To use WAIS, users first select a source of static, textual documents to search. In response, WAIS returns brief descriptions ("headlines") of any documents matching the user-supplied keywords. Users then select among the headlines to retrieve entire documents. Dynamic WAIS extends this paradigm, allowing users to query remote information services, such as the Netfind Internet user location service, and the Archie Internet file location service. To support these gateways, Dynamic WAIS establishes mappings between the WAIS search-and-retrieve operations, and the underlying operations supported by remote information servers. In the case of Netfind, for example, when the Dynamic WAIS user requests to search the dynamicnetfind. src WA

Darren Hardy And

262

Design of Hybrid Mobile Communication Networks for Planetary Exploration  

NASA Technical Reports Server (NTRS)

The Mobile Exploration System Project (MEX) at NASA Ames Research Center has been conducting studies into hybrid communication networks for future planetary missions. These networks consist of space-based communication assets connected to ground-based Internets and planetary surface-based mobile wireless networks. These hybrid mobile networks have been deployed in rugged field locations in the American desert and the Canadian arctic for support of science and simulation activities on at least six occasions. This work has been conducted over the past five years resulting in evolving architectural complexity, improved component characteristics and better analysis and test methods. A rich set of data and techniques have resulted from the development and field testing of the communication network during field expeditions such as the Haughton Mars Project and NASA Mobile Agents Project.

Alena, Richard L.; Ossenfort, John; Lee, Charles; Walker, Edward; Stone, Thom

2004-01-01

263

Coalitional Game Theory for Communication Networks: A Tutorial  

Microsoft Academic Search

Game theoretical techniques have recently become prevalent in many engineering applications, notably in communica- tions. With the emergence of cooperation as a new communication paradigm, and the need for self-organizing, decentralized, and autonomic networks, it has become imperative to seek suitable game theoretical tools that allow to analyze and study the behavior and interactions of the nodes in future communication

Walid Saad; Zhu Han; Mérouane Debbah; Are Hjørungnes; Tamer Basar

2009-01-01

264

Wireless Adhoc Networks for Inter-Vehicle Communication  

Microsoft Academic Search

Future enhancements in automobile technology will cope - besides tradi- tional aspects, like security and driving conditions or comfort aspects of passengers - especially with the ability of vehicles to communicate. The aspirated enhance- ments in the ability of communication of vehicles should not only focus on the use of existing wireless (cellular) networks, but should also concentrate on totally

Michael Meincke; Peter Tondl; María Dolores Pérez Guirao; Klaus Jobmann

2002-01-01

265

A Power Line Communication Network Infrastructure for The Smart Home  

E-print Network

A Power Line Communication Network Infrastructure for The Smart Home Yu-Ju Lin, Haniph A. Latchman's as a basic infrastructure for building integrated "smart homes," wherein infor- mation appliances (IA guarantee QoS for real-time communications, supporting delay sensitive data streams for "Smart Home

Latchman, Haniph A.

266

Accent: A Communication Oriented Network Operating System Kernel  

Microsoft Academic Search

Accent is a communication oriented operating system kernel being built at Carnegie-Mellon University to support the distributed personal computing project, Spice, and the development of a fault-tolerant distributed sensor network (DSN). Accent is. built around a single, powerful abstraction of communication between processes, with all kernel functions, such as device access and virtual memory management accessible through messages and distributable

Richard F. Rashid; George G. Robertson

1981-01-01

267

H? control for networked systems with random communication delays  

Microsoft Academic Search

This note is concerned with a new controller design problem for networked systems with random communication delays. Two kinds of random delays are simultaneously considered: i) from the controller to the plant, and ii) from the sensor to the controller, via a limited bandwidth communication channel. The random delays are modeled as a linear function of the stochastic variable satisfying

Fuwen Yang; Zidong Wang; Y. S. Hung; Mahbub Gani

2006-01-01

268

UNIX kernal networking support and the LINCS communications architecture  

SciTech Connect

This paper describes the UNIX kernel networking suppport developed to allow the LINCS communication architecture to be integrated into the Berkeley 4.2 operating system. It also describes the interaction between LINCS and UNIX when remote interprocess communication occurs. Features added to UNIX include lightweight system tasks, process interrupt tasks, task scheduling and multithreading within processes.

Requa, J.E.

1984-12-12

269

User Character and Communication Pattern Detecting on Social Network Site  

Microsoft Academic Search

As a newly emergent interpersonal communication media, social network site has been attracting researchers' attention world wide. Aiming at disclosing user characters and interpersonal communication pattern, an empirical study based on xiaonei.com is conducted. User's profile data of a typical university has been crawled based on which four types of interaction are identified. Then, these types are used as each

Lailei Huang; Zhengyou Xia

2009-01-01

270

System integration: Development of a global network communication protocol  

Microsoft Academic Search

In the era of globalization and standardization, in the perspective of industrial system integration, the implementation of a network framework able to interconnect any type of device and supporting both real-time (RT) and time-uncritical communication is becoming a must. This paper proposes an original entirely software-based communication framework to support RT communication over standard Ethernet, and compares it with the

Sarah Cosentino; Massimiliano Zecca

2010-01-01

271

77 FR 39239 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...C. section 276 of the Communications Act of 1934, as amended...BOC would publicly disclose technical information about a new service...services or changing network technical specifications to the advantage...and 204(a)(3) of the Communications Act of 1934, as...

2012-07-02

272

Technology Developments Integrating a Space Network Communications Testbed  

NASA Technical Reports Server (NTRS)

As future manned and robotic space explorations missions involve more complex systems, it is essential to verify, validate, and optimize such systems through simulation and emulation in a low cost testbed environment. The goal of such a testbed is to perform detailed testing of advanced space and ground communications networks, technologies, and client applications that are essential for future space exploration missions. We describe the development of new technologies enhancing our Multi-mission Advanced Communications Hybrid Environment for Test and Evaluation (MACHETE) that enable its integration in a distributed space communications testbed. MACHETE combines orbital modeling, link analysis, and protocol and service modeling to quantify system performance based on comprehensive considerations of different aspects of space missions. It can simulate entire networks and can interface with external (testbed) systems. The key technology developments enabling the integration of MACHETE into a distributed testbed are the Monitor and Control module and the QualNet IP Network Emulator module. Specifically, the Monitor and Control module establishes a standard interface mechanism to centralize the management of each testbed component. The QualNet IP Network Emulator module allows externally generated network traffic to be passed through MACHETE to experience simulated network behaviors such as propagation delay, data loss, orbital effects and other communications characteristics, including entire network behaviors. We report a successful integration of MACHETE with a space communication testbed modeling a lunar exploration scenario. This document is the viewgraph slides of the presentation.

Kwong, Winston; Jennings, Esther; Clare, Loren; Leang, Dee

2006-01-01

273

Information and Communications Technologies (ICT) Center  

NSDL National Science Digital Library

The National Center for Information and Communications Technologies, an Advanced Technology Education (ATE) resource center, aims to "contribute to scientific and technological innovation in telecommunications education" as well as to "provide appropriately skilled technicians and technologists" to information and communication technologies (ICT) businesses, industry, and users. In the "Publications" section of this site, visitors will find links to ICT textbooks and a helpful glossary of telecommunications terms. In the "Resources" section, there are a number of ICT workforce development presentations and Flash simulations on topics such as shift keying and Ethernet switching. Also in this section, there is a web tutorial on designing accessible web pages. This site has a great deal of information to assist students and technologists in telecommunications fields, as well as ready-to-use instructional materials for educators.

2007-08-20

274

Exponential Random Graph (p*) Models as a Method for Social Network Analysis in Communication Research  

Microsoft Academic Search

Since the 1970s, communication researchers have utilized social network analysis to understand mass, health, organizational, and interpersonal communication. This article introduces communication researchers to a new class of social network analysis methods, exponential random graph (p*) models. This new method represents the latest advancement in social network methodology and will enhance the trajectory of social network research in the communication

Michelle Shumate; Edward T. Palazzolo

2010-01-01

275

Scheduling algorithms for arbitrary communication networks  

E-print Network

We consider the problem of designing scheduling schemes for networks with arbitrary topology and scheduling constraints. We address the optimality of scheduling schemes for packet networks in terms of throughput, delay and ...

Jagabathula, Srikanth

2008-01-01

276

10 CFR 73.54 - Protection of digital computer and communication systems and networks.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 false Protection of digital computer and communication systems and networks...Sites § 73.54 Protection of digital computer and communication systems and networks...shall provide high assurance that digital computer and communication systems and...

2013-01-01

277

10 CFR 73.54 - Protection of digital computer and communication systems and networks.  

...2014-01-01 false Protection of digital computer and communication systems and networks...Sites § 73.54 Protection of digital computer and communication systems and networks...shall provide high assurance that digital computer and communication systems and...

2014-01-01

278

10 CFR 73.54 - Protection of digital computer and communication systems and networks.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 false Protection of digital computer and communication systems and networks...Sites § 73.54 Protection of digital computer and communication systems and networks...shall provide high assurance that digital computer and communication systems and...

2012-01-01

279

10 CFR 73.54 - Protection of digital computer and communication systems and networks.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 false Protection of digital computer and communication systems and networks...Sites § 73.54 Protection of digital computer and communication systems and networks...shall provide high assurance that digital computer and communication systems and...

2011-01-01

280

10 CFR 73.54 - Protection of digital computer and communication systems and networks.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Protection of digital computer and communication systems and networks...Sites § 73.54 Protection of digital computer and communication systems and networks...shall provide high assurance that digital computer and communication systems and...

2010-01-01

281

Avoiding Communication HotSpots in Interconnection Networks  

Microsoft Academic Search

In creating interconnection networks for parallel computers an efficient design is crucial because of its impact on the performance. A high speed routing scheme that minimises contention and avoids the formation of hot-spots should be included. We have developed a new method to uniformly balance communication traffic over the interconnection network called Distributed Routing Balancing (DRB) based on limited and

D. Franco; I. Garcés; Emilio Luque

1999-01-01

282

Management of Virtual Private Networks for Integrated Broadband Communication  

Microsoft Academic Search

Management of Virtual Private Networks (VPNs) is becoming an increasingly important issue in the context of integrated broadband communication (IBC). In the near future corporate customers may want to subscribe to broadband VPN services offered by globally operating service providers to replace most of their leased line services that are used today to build their corporate networks. The concepts historically

Jürgen M. Schneider; T. Preuß; P. S. Nielsen

1993-01-01

283

Scheduling and Control of Mobile Communications Networks with Randomly Time  

E-print Network

02912 USA hjk@dam.brown.edu Abstract-- Consider a communications network consisting of mobiles, some are weakened, and the distributions of the in- put file lengths can be heavy tailed. The resulting controls with randomly varying links, routing in ad-hoc networks, perturbed stochastic Liapunov functions, heavy tailed

284

Communications network design and costing model programmers manual  

NASA Technical Reports Server (NTRS)

Otpimization algorithms and techniques used in the communications network design and costing model for least cost route and least cost network problems are examined from the programmer's point of view. All system program modules, the data structures within the model, and the files which make up the data base are described.

Logan, K. P.; Somes, S. S.; Clark, C. A.

1983-01-01

285

A correctness proof of a topology information maintenance protocol for a distributed computer network  

Microsoft Academic Search

In order for the nodes of a distributed computer network to communicate, each node must have information about the network's topology. Since nodes and links sometimes crash, a scheme is needed to update this information. One of the major constraints on such a topology information scheme is that it may not involve a central controller. The Topology Information Protocol that

William D. Tajibnapis; D. Siewiorek

1977-01-01

286

College of Communication & Information 1345 Circle Park Drive | Suite 302  

E-print Network

OF COMMUNICATION & INFORMATION The four schools of CCI · Advertising and Public Relations · Communication Studies half of the faculty. UTSchoolOfADandPR @UTAdvPR School of Communication Studies (CS) · NationalCollege of Communication & Information 1345 Circle Park Drive | Suite 302 Knoxville, TN 37996

Grissino-Mayer, Henri D.

287

Novel technology for enhanced security and trust in communication networks  

NASA Astrophysics Data System (ADS)

A novel technology that significantly enhances security and trust in wireless and wired communication networks has been developed. It is based on integration of a novel encryption mechanism and novel data packet structure with enhanced security tools. This novel data packet structure results in an unprecedented level of security and trust, while at the same time reducing power consumption and computing/communication overhead in networks. As a result, networks are provided with protection against intrusion, exploitation, and cyber attacks and posses self-building, self-awareness, self-configuring, self-healing, and self-protecting intelligence.

Milovanov, Alexander; Bukshpun, Leonid; Pradhan, Ranjit; Jannson, Tomasz

2011-06-01

288

Crossbar Switches For Optical Data-Communication Networks  

NASA Technical Reports Server (NTRS)

Optoelectronic and electro-optical crossbar switches called "permutation engines" (PE's) developed to route packets of data through fiber-optic communication networks. Basic network concept described in "High-Speed Optical Wide-Area Data-Communication Network" (NPO-18983). Nonblocking operation achieved by decentralized switching and control scheme. Each packet routed up or down in each column of this 5-input/5-output permutation engine. Routing algorithm ensures each packet arrives at its designated output port without blocking any other packet that does not contend for same output port.

Monacos, Steve P.

1994-01-01

289

A Wavelength Division Multiple Access Network for Computer Communication  

Microsoft Academic Search

A first-generation design, called Rainbow, for optical wavelength division multiaccess (WDMA) computer networks is described. The Rainbow research prototype takes the form of a direct detection, circuit-switched metropolitan-area-network (MAN) backbone consisting of 32 IBM PD\\/2's as gateway stations, communicating with each other at 200-Mb\\/s data rates and submillisecond switching times. The prototype architectural options for realizing WDMA networks are discussed,

Nicholas R. Dono; Paul E. Green Jr.; Karen Liu; Rajiv Ramaswami; Franklin Fuk-Kay Tong

1990-01-01

290

Migration and Diaspora in the Age of Information and Communication Technologies  

Microsoft Academic Search

‘Migration and the Internet: Social Networking and Diasporas’ is an interdisciplinary collection that explores new emerging media and technological networks—developed by individual and family migrants—which help to construct transnational and diasporic communities. Despite the fact that there is an increasing interest in ‘migration’ and in ‘information and communication technology’ studies, this Special Issue of JEMS goes beyond mere description of

Pedro J. Oiarzabal; Ulf-Dietrich Reips

2012-01-01

291

Integrating emerging topics through online team design in a hybrid communication networks course: Interaction patterns and impact  

E-print Network

Integrating emerging topics through online team design in a hybrid communication networks course to an emerging communication networks topic. The online team design project was evaluated with a thematic. All rights reserved. Keywords: Asynchronous communication; Communication networks course; Emerging

Reisslein, Martin

292

Predicting Communication Intention in Social Networks Charalampos Chelmis  

E-print Network

advertising campaigns. Link prediction in social networks is a challenging prob- lem, as social networking link prediction, but this information is not well struc- tured, and is often misleading or ambiguous

Prasanna, Viktor K.

293

Information needs for risk management/communication  

SciTech Connect

The hazardous waste cleanup program under the Comprehensive Environmental Response, Compensation, and Liability Act (Superfund) is delegated to the ten Regions of the US Environmental Protection Agency (EPA) and has, to date, identified more than 33,000 sites for consideration. The size and complexity of the program places great demands on those who would provide information to achieve national consistency in application of risk assessment while meeting site-specific needs for risk management and risk communication.

Bennett, D.A. [Environmental Protection Agency, Washington, DC (United States)

1990-12-31

294

Dynamics of information spread on networks  

E-print Network

.S. Government Asks Twitter to Stay Up for #IranElection 2: Western Corporations Helped Censor Iranian Internet information spread on networks? · How far and how fast does information flow? · How does the network structure is the structure of the network? · Who are the influential users and communities? · How does network structure

Lerman, Kristina

295

NASCOM network ground communications availability report  

NASA Technical Reports Server (NTRS)

A performance analysis of NASCOM Network circuits is presented. An objective of 99.80 percent availability has been established for all network circuits and an acceptable level of 99.50. A network narrative summary for the current month includes changes in network configurations, current month's totals for modes of service and trouble category losses, a discussion of trends, and significant losses that affected the performance indexes of individual or groups of circuits. A table and narrative summary of those circuits that failed to meet the objective of 99.80% availability for all network circuits and an acceptable level of 99.50. Lost time and interruption tables showing all circuits affected by outages, by trouble category, with their total time and events, scheduled operating hours, and individual availability indexes also are included. Selected circuits whose availabilities have or continue to affect the overall network availability are also analyzed.

1983-01-01

296

Exploring the Potential of Social Network Sites in Relation to Intercultural Communication  

ERIC Educational Resources Information Center

This article reports on the results of a project which used a social network site to support students on a year abroad and foster informal learning, particularly in the area of intercultural communication. The project employed a peer-mentoring structure to solve the problem of role conflict, in which users of these sites may feel some tension as…

Lang, Anouk

2012-01-01

297

Family Health History Communication Networks of Older Adults: Importance of Social Relationships and Disease Perceptions  

ERIC Educational Resources Information Center

Older individuals play a critical role in disseminating family health history (FHH) information that can facilitate disease prevention among younger family members. This study evaluated the characteristics of older adults and their familial networks associated with two types of communication ("have shared" and "intend to share…

Ashida, Sato; Kaphingst, Kimberly A.; Goodman, Melody; Schafer, Ellen J.

2013-01-01

298

Control of communication networks: welfare maximization and multipath transfers.  

PubMed

We discuss control strategies for communication networks such as the Internet. We advocate the goal of welfare maximization as a paradigm for network resource allocation. We explore the application of this paradigm to the case of parallel network paths. We show that welfare maximization requires active balancing across paths by data sources, and potentially requires implementation of novel transport protocols. However, the only requirement from the underlying 'network layer' is to expose the marginal congestion cost of network paths to the 'transport layer'. We further illustrate the versatility of the corresponding layered architecture by describing transport protocols with the following properties: they welfare maximization, each communication may use an arbitrary collection of paths, where paths may be from an overlay, and paths may be combined in series and parallel. We conclude by commenting on incentives, pricing and open problems. PMID:18325871

Key, Peter B; Massoulié, Laurent

2008-06-13

299

Communicating Centrality in Policy Network Drawings  

E-print Network

applied in the social sciences. Policy network analysis is an approach to study policy making structures decade, the policy network approach has become particularly prominent in the analysis of public policies policy making than private actors or that national actors are more important than local actors. Thus

Brandes, Ulrik

300

CSCE 3030: Parallel Programming Communication Network Topologies  

E-print Network

Bus based (shared medium) networks Hypercube networks CSCE 3030: Feb. 08, 2011 1 Homework #1 2.4, 2.11, 2.15 Will meet in F 218 on Thu 2/10/11 #12;CSCE 3030: Parallel. 08, 2011 3 Chapter 3. Task/Channel Model Task Channel Synchronous vs Asynchronous

Kavi, Krishna

301

college of mass communications & information studies college of mass communications & information studies  

E-print Network

Communications, and Library and Information Science ­the college prepares its graduates to collect, synthesize of Library and Information Science provides students with undergraduate through graduate-level education Creative Strategy and Advertising Campaigns ­ along with her Honors College seminar course on Super Bowl

Almor, Amit

302

Novel Quantum Virtual Private Network Scheme for PON via Quantum Secure Direct Communication  

NASA Astrophysics Data System (ADS)

Two quantum secure direct communication (QSDC) protocols with quantum identification (QI) based on passive optical network (PON) architecture are proposed. One QSDC protocol can be implemented between two different optical network units just with simple configurations of PON by optical line terminal when they are in the same virtual private network after optical line terminal performing QI to the optical network units in the given PON architecture. The other QSDC protocol is also implemented between any two legitimated users in the virtual private network but with considerable reduction of workload of the optical line terminal. The security analysis shows that the proposed QSDC schemes with quantum identification are unconditionally secure and allow the legitimate users to exchange their secret information efficiently and to realize a quantum virtual private network in the PON networks ultimately.

Gong, Li-Hua; Liu, Ye; Zhou, Nan-Run

2013-09-01

303

Efficient data communication protocols for wireless networks  

NASA Astrophysics Data System (ADS)

In this dissertation, efficient decentralized algorithms are investigated for cost minimization problems in wireless networks. For wireless sensor networks, we investigate both the reduction in the energy consumption and throughput maximization problems separately using multi-hop data aggregation for correlated data in wireless sensor networks. The proposed algorithms exploit data redundancy using a game theoretic framework. For energy minimization, routes are chosen to minimize the total energy expended by the network using best response dynamics to local data. The cost function used in routing takes into account distance, interference and in-network data aggregation. The proposed energy-efficient correlation-aware routing algorithm significantly reduces the energy consumption in the network and converges in a finite number of steps iteratively. For throughput maximization, we consider both the interference distribution across the network and correlation between forwarded data when establishing routes. Nodes along each route are chosen to minimize the interference impact in their neighborhood and to maximize the in-network data aggregation. The resulting network topology maximizes the global network throughput and the algorithm is guaranteed to converge with a finite number of steps using best response dynamics. For multiple antenna wireless ad-hoc networks, we present distributed cooperative and regret-matching based learning schemes for joint transmit beanformer and power level selection problem for nodes operating in multi-user interference environment. Total network transmit power is minimized while ensuring a constant received signal-to-interference and noise ratio at each receiver. In cooperative and regret-matching based power minimization algorithms, transmit beanformers are selected from a predefined codebook to minimize the total power. By selecting transmit beamformers judiciously and performing power adaptation, the cooperative algorithm is shown to converge to pure strategy Nash equilibrium with high probability throughout the iterations in the interference impaired network. On the other hand, the regret-matching learning algorithm is noncooperative and requires minimum amount of overhead. The proposed cooperative and regret-matching based distributed algorithms are also compared with centralized solutions through simulation results.

Zeydan, Engin

304

The deep space network, volume 18. [Deep Space Instrumentation Facility, Ground Communication Facility, and Network Control System  

NASA Technical Reports Server (NTRS)

The objectives, functions, and organization of the Deep Space Network are summarized. The Deep Space Instrumentation Facility, the Ground Communications Facility, and the Network Control System are described.

1973-01-01

305

Signaling communication events in a computer network  

DOEpatents

A method, apparatus and program product for detecting a communication event in a distributed parallel data processing system in which a message is sent from an origin to a target. A low-level application programming interface (LAPI) is provided which has an operation for associating a counter with a communication event to be detected. The LAPI increments the counter upon the occurrence of the communication event. The number in the counter is monitored, and when the number increases, the event is detected. A completion counter in the origin is associated with the completion of a message being sent from the origin to the target. When the message is completed, LAPI increments the completion counter such that monitoring the completion counter detects the completion of the message. The completion counter may be used to insure that a first message has been sent from the origin to the target and completed before a second message is sent.

Bender, Carl A. (Highland, NY); DiNicola, Paul D. (Hurley, NY); Gildea, Kevin J. (Bloomington, NY); Govindaraju, Rama K. (Poughkeepsie, NY); Kim, Chulho (Poughkeepsie, NY); Mirza, Jamshed H. (Woodstock, NY); Shah, Gautam H. (Wappingers Falls, NY); Nieplocha, Jaroslaw (Richland, WA)

2000-01-01

306

Local repair mechaism for reliable multicast in Integrated Communication and Broadcast Networks with scalability  

Microsoft Academic Search

With the rapid growth of bandwidth requirement for mobile multimedia services, broadcast communication infrastructure is desired as one of the best solutions for avoiding communication congestion. Integrated Communication and Broadcast Network (ICBN), consisting of broadcast network and communication network, is one of the solutions. However, in reliable multicast service over ICBN, feedbacks from receivers cause feedback implosion problem. Also, because

Hideya Yoshiuchi; Jiping Lu; Satoshi Yoshizawa; Zhisheng Niu

2010-01-01

307

A repair mechanism for reliable multicast in Integrated Communication and Broadcast Networks  

Microsoft Academic Search

With the rapid growth of bandwidth requirement for mobile multimedia services, broadcast communication infrastructure is desired as one of the best solutions for avoiding communication congestion. Integrated communication and broadcast network (ICBN), consisting of broadcast network and communication network, is one of the solutions. However, in reliable multicast service over ICBN, feedbacks from receivers cause feedback implosion problem. Also, because

Hideya Yoshiuchi; Jiping Lv; Satoshi Yoshizawa; Zhisheng Niu

2009-01-01

308

Doubly Optimal Secure Multicasting: Hierarchical Hybrid Communication Network : Disaster Relief  

E-print Network

Recently, the world has witnessed the increasing occurrence of disasters, some of natural origin and others caused by man. The intensity of the phenomenon that cause such disasters, the frequency in which they occur, the number of people affected and the material damage caused by them have been growing substantially. Disasters are defined as natural, technological, and human-initiated events that disrupt the normal functioning of the economy and society on a large scale. Areas where disasters have occurred bring many dangers to rescue teams and the communication network infrastructure is usually destroyed. To manage these hazards, different wireless technologies can be launched in the area of disaster. This paper discusses the innovative wireless technologies for Disaster Management. Specifically, issues related to the design of Hierarchical Hybrid Communication Network (arising in the communication network for disaster relief) are discussed.

Garimella, Rama Murthy; Singhal, Deepti

2011-01-01

309

NASCOM network: Ground communications reliability report  

NASA Technical Reports Server (NTRS)

A reliability performance analysis of the NASCOM Network circuits is reported. Network performance narrative summary is presented to include significant changes in circuit configurations, current figures, and trends in each trouble category with notable circuit totals specified. Lost time and interruption tables listing circuits which were affected by outages showing their totals category are submitted. A special analysis of circuits with low reliabilities is developed with tables depicting the performance and graphs for individual reliabilities.

1973-01-01

310

Communication synthesis for on chip networks  

E-print Network

logic overheads, area per bit of storage, frequency of network and bus operations, number of allowed buses inside a cluster and signaling overheads (in terms of number of wires per data wire) for the physical layer. Conneolon Fle Implementat on File... logic overheads, area per bit of storage, frequency of network and bus operations, number of allowed buses inside a cluster and signaling overheads (in terms of number of wires per data wire) for the physical layer. Conneolon Fle Implementat on File...

Swaminathan, Narayanan

2012-06-07

311

A Mobile Multimedia Communication Framework for IP based Convergence Networks  

Microsoft Academic Search

We propose an efficient mobile multimedia communication protocol, mobile terminal software platform and mobile VoIP application for IP-based convergence networks. The proposed mobile multimedia communication protocol is called as ST-MRSVP (split tunnel based mobile resource reservation protocol) which integrates split tunnel based mobile IP and RSVP. Since mobile multimedia terminal platform should support seamless QoS level, mobile QoS modules for

Won-Tae Kim

2006-01-01

312

A congestion avoidance communication protocol for network on chip  

Microsoft Academic Search

A good communication protocol can ensure the quality of services and balance the flexibility and performance in the on-chip network. This paper presents an on-chip congestion avoidance communication protocol, and introduces a deadlock-free, adaptive routing algorithm. In order to meet the needs of a wide range of applications, the protocol provides differentiated services, which offer different levels of service quality

Li Zi-di; Jiang Lin

2010-01-01

313

Analyzing the Dynamics of Communication in Online Social Networks  

Microsoft Academic Search

\\u000a This chapter deals with the analysis of interpersonal communication dynamics in online social networks and social media. Communication\\u000a is central to the evolution of social systems. Today, the different online social sites feature variegated interactional affordances,\\u000a ranging from blogging, micro-blogging, sharing media elements (i.e., image, video) as well as a rich set of social actions\\u000a such as tagging, voting, commenting

Munmun De Choudhury; Hari Sundaram; Ajita John; Doree Duncan Seligmann

2010-01-01

314

Analysis of adaptive algorithms for an integrated communication network  

NASA Technical Reports Server (NTRS)

Techniques were examined that trade communication bandwidth for decreased transmission delays. When the network is lightly used, these schemes attempt to use additional network resources to decrease communication delays. As the network utilization rises, the schemes degrade gracefully, still providing service but with minimal use of the network. Because the schemes use a combination of circuit and packet switching, they should respond to variations in the types and amounts of network traffic. Also, a combination of circuit and packet switching to support the widely varying traffic demands imposed on an integrated network was investigated. The packet switched component is best suited to bursty traffic where some delays in delivery are acceptable. The circuit switched component is reserved for traffic that must meet real time constraints. Selected packet routing algorithms that might be used in an integrated network were simulated. An integrated traffic places widely varying workload demands on a network. Adaptive algorithms were identified, ones that respond to both the transient and evolutionary changes that arise in integrated networks. A new algorithm was developed, hybrid weighted routing, that adapts to workload changes.

Reed, Daniel A.; Barr, Matthew; Chong-Kwon, Kim

1985-01-01

315

Secure Communication among Cell Phones and Sensor Networks  

Microsoft Academic Search

Numerous applications, ranging from disaster management to smart buildings, have been proposed for sensor networks. The practicality of these applications depends on the ability of users to interact with these networks, in many cases in real time. In this paper we propose that cell phones interact with sensor networks and obtain the relevant information in real time. Cell phones can

Arjan Durresi; Vamsi Paruchuri

2009-01-01

316

On Writing, Technical Communication, and Information Technology: The Core Competencies of Technical Communication.  

ERIC Educational Resources Information Center

Argues that working professionals and academics in technical communication should participate in activities that makes the core expertise of technical communication explicit. Discusses why technical communication needs theory. Outlines core competencies of technical communicators and argues that they have a central role to play in Information

Hart-Davidson, William

2001-01-01

317

Network Communication as a Service-Oriented Capability  

SciTech Connect

In widely distributed systems generally, and in science-oriented Grids in particular, software, CPU time, storage, etc., are treated as"services" -- they can be allocated and used with service guarantees that allows them to be integrated into systems that perform complex tasks. Network communication is currently not a service -- it is provided, in general, as a"best effort" capability with no guarantees and only statistical predictability. In order for Grids (and most types of systems with widely distributed components) to be successful in performing the sustained, complex tasks of large-scale science -- e.g., the multi-disciplinary simulation of next generation climate modeling and management and analysis of the petabytes of data that will come from the next generation of scientific instrument (which is very soon for the LHC at CERN) -- networks must provide communication capability that is service-oriented: That is it must be configurable, schedulable, predictable, and reliable. In order to accomplish this, the research and education network community is undertaking a strategy that involves changes in network architecture to support multiple classes of service; development and deployment of service-oriented communication services, and; monitoring and reporting in a form that is directly useful to the application-oriented system so that it may adapt to communications failures. In this paper we describe ESnet's approach to each of these -- an approach that is part of an international community effort to have intra-distributed system communication be based on a service-oriented capability.

Johnston, William; Johnston, William; Metzger, Joe; Collins, Michael; Burrescia, Joseph; Dart, Eli; Gagliardi, Jim; Guok, Chin; Oberman, Kevin; O'Conner, Mike

2008-01-08

318

Intrinsically secure communication in large-scale wireless networks  

E-print Network

The ability to exchange secret information is critical to many commercial, governmental, and military networks. Information-theoretic security - widely accepted as the strictest notion of security - relies on channel coding ...

Pinto, Pedro C. (Pedro Correia)

2010-01-01

319

Universities Water Information Network (UWIN)  

NSDL National Science Digital Library

Based at Southern Illinois University in Carbondale, Illinois, the Universities Water Information Network (UWIN) is a USGS-funded meta-resource that centralizes water information on the WWW. The heart of the site is the searchable WRSIC (Water Resources Scientific Information Center) research abstracts bibliographic database, containing over 265,000 research abstracts and citations covering "a wide variety of (international) topics that span the time period from 1967 to October, 1993." Research abstracts in the database include "the life, physical, and social sciences, as well as engineering and legal issues." In addition to the database, UWIN offers tips for finding Water Resources on the Web (see the WetList section), as well as professional announcements, directories, and employment-related tips.

320

Non-line-of-sight underwater optical wireless communication network.  

PubMed

The growing need for ocean observation systems has stimulated considerable interest within the research community in advancing the enabling technologies of underwater wireless communication and underwater sensor networks. Sensors and ad hoc sensor networks are the emerging tools for performing extensive data-gathering operations on land, and solutions in the subsea setting are being sought. Efficient communication from the sensors and within the network is critical, but the underwater environment is extremely challenging. Addressing the special features of underwater wireless communication in sensor networks, we propose a novel non-line-of-sight network concept in which the link is implemented by means of back-reflection of the propagating optic signal at the ocean-air interface and derive a mathematical model of the channel. Point-to-multipoint links can be achieved in an energy efficient manner and broadcast broadband communications, such as video transmissions, can be executed. We show achievable bit error rates as a function of sensor node separation and demonstrate the feasibility of this concept using state-of-the-art silicon photomultiplier detectors. PMID:19252651

Arnon, Shlomi; Kedar, Debbie

2009-03-01

321

78 FR 66704 - Information Collections Being Reviewed by the Federal Communications Commission  

Federal Register 2010, 2011, 2012, 2013

...or program guide) with accurate information...76.127, Satellite Sports Blackout Rules. Form...339 and 340 of the Communications Act of 1934, as amended...need for confidentiality with this collection of information...network, syndicated, and sports programming in the...

2013-11-06

322

Risk management communication system between a local government and residents using several network systems and terminal devices  

NASA Astrophysics Data System (ADS)

Most of Japan's local governments utilize municipal disaster-management radio communications systems to communicate information on disasters or terrorism to residents. The national government is progressing in efforts toward digitalization by local governments of these systems, but only a small number (approx. 10%) have introduced such equipment due to its requiring large amounts of investment. On the other hand, many local governments are moving forward in installation of optical fiber networks for the purpose of eliminating the "digital divide." We herein propose a communication system as an alternative or supplement to municipal disaster-management radio communications systems, which utilizes municipal optical fiber networks, the internet and similar networks and terminals. The system utilizes the multiple existing networks and is capable of instantly distributing to all residents, and controlling, risk management information. We describe the system overview and the field trials conducted with a local government using this system.

Ohyama, Takashi; Enomoto, Hiroyuki; Takei, Yuichiro; Maeda, Yuji

2009-05-01

323

Human Communication and Information Science Division Introductory L e c t u r e s Seminars and Thesis Programs EducationVerbal Communication Human CommunicationInformation Technology  

E-print Network

processing and storage and utilize those skills #12;Intercultural Communication Division Introductory L e c#12;#12;#12;Human Communication and Information Science Division Introductory L e c t u r e s Seminars and Thesis Programs EducationVerbal Communication Human CommunicationInformation Technology

Banbara, Mutsunori

324

Stabilizing control of networks with uncertain time varying communication delays  

Microsoft Academic Search

Building a real-time (RT) control network using standard TCP\\/IP and Ethernet is often difficult, because the communication protocols usually have unpredictable time delays. When RT packets are transported within an ordinary Ethernet network, there may be a significant time delay before receiving them. This sometimes causes loop instability and performance degradation. A compensation scheme that consists of a fuzzy-PID controller

Chun-Liang Lin; Chun-Hsiung Chen; Hsin-Chang Huang

2008-01-01

325

Basics of perfect communication through quantum networks  

SciTech Connect

Perfect transfer of a quantum state through a one-dimensional chain is now well understood, allowing one not only to decide whether a fixed Hamiltonian achieves perfect transfer but to design a suitable one. We are particularly interested in being able to design, or understand the limitations imposed upon, Hamiltonians subject to various naturally arising constraints such as a limited coupling topology with low connectivity (specified by a graph) and type of interaction. In this paper, we characterize the necessary and sufficient conditions for transfer through a network and describe some natural consequences such as the impossibility of routing between many different recipients for a large class of Hamiltonians and the limitations on transfer rate. We also consider some of the trade-offs that arise in uniformly coupled networks (both Heisenberg and XX models) between transfer distance and the size of the network as a consequence of the derived conditions.

Kay, Alastair [Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, and Keble College, Parks Road, Oxford OX1 3PG (United Kingdom)

2011-08-15

326

Networks information in the civil wars  

Microsoft Academic Search

The aim of this paper is to interpret the relationships between information networks and the civil wars (Colombia). Over a period of paramilitary violence networks of informants were used with a strategic purpose. In fact, the paramilitaries were preparing each slaughter counting information previously learned between the inhabitants of the town. For these reasons, it is shown that information is

Estrada Fernando

2010-01-01

327

High speed laser communication network for satellite systems  

NASA Astrophysics Data System (ADS)

Using optical links in space and building high speed laser communications network has proven to be an extremely complicated task and many such schemes were tried without success in the past. However, in the last few years, there has been impressive progress made to bring the concept to fruition in civilian and government-non classified projects. In this paper we will focus on the requirements of the space-based lasers and optics used for beam forming, as well as receiver antenna gain and detectors used in free space communications. High data rate, small antenna size, narrow beam divergence, and a narrow field of view are characteristics of laser communications that offer a number of potential advantages for system design. Space-based optical communications using satellites in low earth orbit (LEO) and Geo-synchronous orbits (GEO) hold great promise for the proposed Internet in the Sky network of the future. Also discussed are the critical parameters in the transmitter, channel, receiver, and link budget that are employed in successful inter-satellite communications system. We cover that Laser Communications offer a viable alternative to established RF communications for inter-satellite links and other applications where high performance links are a necessity.

Panahi, Allen; Kazemi, Alex A.

2011-06-01

328

Hybrid Communications Network Simulation-Independent Toolkit.  

National Technical Information Service (NTIS)

Net-centric warfare requires information superiority to enable decision superiority, culminating in insurmountable combat power against our enemies on the battlefield. Information superiority must be attained and retained for success in today's joint/coal...

D. M. Dines

2008-01-01

329

The Networkers Network: A Study of the Impact of a New Communications Medium on Sociometric Structure.  

National Technical Information Service (NTIS)

Forty social scientists and mathematicians, all concerned with problems in the study of social networks, were linked together by means of a computer to facilitate their interpersonal communication. The present paper presents the early results of this expe...

S. C. Freeman, L. C. Freeman

1981-01-01

330

Harnessing the Swarm Communications Policy in an Era of Ubiquitous Networks and Disruptive Technologies (*)  

Microsoft Academic Search

This paper examines the prospects and limits of policies on information and communications technologies (ICTs) that enable knowledge-based societies. Its main argument is that the co-evolution of technological, economic, and political factors, which unfolded during the past three decades, has transformed the information network infrastructure from a closed to an open system. This fundamental change has far-reaching implications for the

Johannes M. BAUER

331

SIA: secure information aggregation in sensor networks  

Microsoft Academic Search

Sensor networks promise viable solutions to many monitoring problems. However, the practical deployment of sensor networks faces many challenges imposed by real-world demands. Sensor nodes often have limited computation and communication resources and battery power. Moreover, in many applications sensors are deployed in open environments, and hence are vulnerable to physical attacks, potentially compromising the sensor's cryptographic keys.One of the

Bartosz Przydatek; Dawn Xiaodong Song; Adrian Perrig

2003-01-01

332

Predicting Network Response Times Using Social Information  

Microsoft Academic Search

Social networks and discussion boards have become a significant outlet where people communicate and express their opinion freely. Although the social networks themselves are usually well-provisioned, the participating users frequently point to external links to substantiate their discussions. Unfortunately, the sudden heavy traffic load imposed on the external, linked web sites causes them to become unresponsive leading to the \\

Chen Liang; Sharath Hiremagalore; Angelos Stavrou; Huzefa Rangwala

2011-01-01

333

Space-based Networking Technology Developments in the Interplanetary Network Directorate Information Technology Program  

NASA Technical Reports Server (NTRS)

Described recent development of communications protocols, services, and associated tools targeted to reduce risk, reduce cost and increase efficiency of IND infrastructure and supported mission operations. Space-based networking technologies developed were: a) Provide differentiated quality of service (QoS) that will give precedence to traffic that users have selected as having the greatest importance and/or time-criticality; b) Improve the total value of information to users through the use of QoS prioritization techniques; c) Increase operational flexibility and improve command-response turnaround; d) Enable new class of networked and collaborative science missions; e) Simplify applications interfaces to communications services; and f) Reduce risk and cost from a common object model and automated scheduling and communications protocols. Technologies are described in three general areas: communications scheduling, middleware, and protocols. Additionally developed simulation environment, which provides comprehensive, quantitative understanding of the technologies performance within overall, evolving architecture, as well as ability to refine & optimize specific components.

Clare, Loren; Clement, B.; Gao, J.; Hutcherson, J.; Jennings, E.

2006-01-01

334

Information-Seeking Behavior in Intercultural and Intergroup Communication.  

ERIC Educational Resources Information Center

Reviews the current state of information-seeking research and theory in the field of intercultural communication. Draws distinctions between different types of intercultural communication research. Discusses how information seeking might be relevant across types and different between types of intercultural communication. Recommends directions for…

Baldwin, John R.; Hunt, Stephen K.

2002-01-01

335

The Effect of Information Overlap on Communication Effectiveness  

ERIC Educational Resources Information Center

It makes sense that the more information people share, the better they communicate. To evaluate the effect of knowledge overlap on the effectiveness of communication, participants played a communication game where the "director" identified objects to the "addressee". Pairs either shared information about most objects' names (high overlap), or…

Wu, Shali; Keysar, Boaz

2007-01-01

336

Computational Inference of Neural Information Flow Networks  

E-print Network

Computational Inference of Neural Information Flow Networks V. Anne Smith1[¤ , Jing Yu1,2[¤ , Tom V, Hartemink AJ, Jarvis ED (2006) Computational inference of neural information flow networks. PLoS Comput Biol connectivity networks. But traffic congestion, power blackouts, packet routing, computation, and animal

Jarvis, Erich D.

337

Time Allocation in Social Networks: Correlation Between Social Structure and Human Communication Dynamics  

NASA Astrophysics Data System (ADS)

Recent research has shown the deep impact of the dynamics of human interactions (or temporal social networks) on the spreading of information, opinion formation, etc. In general, the bursty nature of human interactions lowers the interaction between people to the extent that both the speed and reach of information diffusion are diminished. Using a large database of 20 million users of mobile phone calls we show evidence this effect is not homogeneous in the social network but in fact, there is a large correlation between this effect and the social topological structure around a given individual. In particular, we show that social relations of hubs in a network are relatively weaker from the dynamical point than those that are poorer connected in the information diffusion process. Our results show the importance of the temporal patterns of communication when analyzing and modeling dynamical process on social networks.

Miritello, Giovanna; Lara, Rubén; Moro, Esteban

338

Optimizing Secure Communication Standards for Disadvantaged Networks  

E-print Network

, we offer a few extensions to the Extensible Messaging and Presence Protocol (XMPP) to wrap secure group messages for chat on disadvantaged networks and to reduce XMPP message overhead in secure group that these optimizations have on message overhead, extensibility, and usability of both CMS and XMPP. We have developed

339

Network Nation: Human Communication via Computer  

E-print Network

, and the elderly and handicapped are released from the confines of their infirmities to skim the electronic terrain, whose dissertation topic was "gratitude" end up reading a techie book like Network Nation? I owe-up reading, including Murray Turoff's (1972) paper on Delphi anonymous online decision making. The federal

Kiesler, Sara

340

Information and communication technologies in support of sustainable human development  

Microsoft Academic Search

Information and communication technologies (ICTs) have the potential for addressing many of the informational needs of human beings. Information is knowledge and knowledge creates power. Knowledge propels and sustains human development and can promote a healthy, growing equitable economy -- an economy where the benefits and opportunities are shared equitably among women, minorities, poor, immigrants and the handicapped. Information communication

El-Tayeb Amna Musa

1999-01-01

341

[Information and communication technologies in nursing].  

PubMed

The application of information and communication technologies (ICT) in nursing is an integral part of the educational curriculum at the university graduate level of nursing, but also part of scientific and professional meetings on nursing informatics. As part of seminars, students are obliged to choose e-health topics from their working environment, to show them and discuss with colleagues. The same is happening at meeting on nursing informatics. Selected papers on the issue are chosen to cover information literacy of nurses, examples of e-nursing, ICT infrastructure, the possible future developments and organizational aspects of e-health at healthcare institutions. Among others, special attention is paid to improving the quality of work in nursing. PMID:24979889

Kern, Josipa

2014-03-01

342

Latin American Network Information Center  

NSDL National Science Digital Library

Started in 1992 and affiliated with the Lozano Long Institute of Latin American Studies at the University of Texas at Austin, the Latin American Network Information Center (LANIC) is designed to "facilitate access to Internet-based information to, from, or on Latin America." Their site was redesigned in the spring of 2008, and currently their various directories contain over 12,000 unique URLs for use by the general public. These links can be browsed by subject headings or by country, and visitors can look into more discrete topical headings like "food", "political science", and "social work". Along with these high-quality links, visitors can then click on over to their "Digital Initiatives" area. Here they will find digital collections that cover documents from the New Mexican Revolution and the full-text Fidel Castro Speech database. Visitors will also appreciate that many of the site's resources are available in Spanish and Portuguese.

343

SECURITY AND COMMUNICATION NETWORKS Security Comm. Networks. (2010)  

E-print Network

and wireless networks are being attacked and hacked on continuous basis. One of the critical piecesIntrusionDetectionSystem(IDS)isanautomated system designed to detect malicious attacks on computer systems through the Internet. The main aim of IDS

Aloul, Fadi

344

Progress on the Development of Future Airport Surface Wireless Communications Network  

NASA Technical Reports Server (NTRS)

Continuing advances in airport surface management and improvements in airport surface safety are required to enable future growth in air traffic throughout the airspace, as airport arrival and departure delays create a major system bottleneck. These airport management and safety advances will be built upon improved communications, navigation, surveillance, and weather sensing, creating an information environment supporting system automation. The efficient movement of the digital data generated from these systems requires an underlying communications network infrastructure to connect data sources with the intended users with the required quality of service. Current airport surface communications consists primarily of buried copper or fiber cable. Safety related communications with mobile airport surface assets occurs over 25 kHz VHF voice and data channels. The available VHF spectrum, already congested in many areas, will be insufficient to support future data traffic requirements. Therefore, a broadband wireless airport surface communications network is considered a requirement for the future airport component of the air transportation system. Progress has been made on defining the technology and frequency spectrum for the airport surface wireless communications network. The development of a test and demonstration facility and the definition of required testing and standards development are now underway. This paper will review the progress and planned future work.

Kerczewski, Robert J.; Budinger, James M.; Brooks, David E.; Franklin, Morgan; DeHart, Steve; Dimond, Robert P.; Borden, Michael

2009-01-01

345

Emerging information technology and the expanding role of technical communicators  

E-print Network

Emerging information technology is expanding the role of technical communicators. Functionality present in software tools contributes to a re-definition of what tasks technical communicators currently perform and how they will use object management...

McGuire, Richard Charles

2012-06-07

346

Informal Communication in an Online Volunteer Community: Implications for  

E-print Network

Relationships Susan R. Fussell and Leslie D. Setlock Human-computer Interaction Institute, Carnegie Mellon in which proximity benefits informal communication and relationship development and how technologies can opportunities for interpersonal communication and relationship development and then examine how dimensions

Fussell, Susan R.

347

Swarm Intelligence for Routing in Communication Networks I. Kassabalidis*  

E-print Network

Swarm Intelligence for Routing in Communication Networks I. Kassabalidis* , M.A. El-Sharkawi* , R.J.Marks II* , P. Arabshahi , A.A. Gray ,_ Abstract ­ Swarm intelligence, as demonstrated by natural analytically understanding and extending the design principles and operations exhibited by intelligent

Arabshahi, Payman

348

Practical Voice Communications in Challenged Networks Md. Tarikul Islam1  

E-print Network

Practical Voice Communications in Challenged Networks Md. Tarikul Islam1 , Anssi Turkulainen1-talkie" fashion. PTT services have become increasingly popular due to proliferation of personal handheld devices environments in the walkie-talkie fashion. Complete voice messages are captured at the source and encapsulated

Ott, Jörg

349

Considerations on communications network protocols in deep space  

NASA Technical Reports Server (NTRS)

Communications supporting deep space missions impose numerous unique constraints that impact the architectural choices made for cost-effectiveness. We are entering the era where networks that exist in deep space are needed to support planetary exploration. Cost-effective performance will require a balanced integration of applicable widely used standard protocols with new and innovative designs.

Clare, L. P.; Agre, J. R.; Yan, T.

2001-01-01

350

Using recurrent neural networks for adaptive communication channel equalization  

Microsoft Academic Search

Nonlinear adaptive filters based on a variety of neural network models have been used successfully for system identification and noise-cancellation in a wide class of applications. An important problem in data communications is that of channel equalization, i.e., the removal of interferences introduced by linear or nonlinear message corrupting mechanisms, so that the originally transmitted symbols can be recovered correctly

G. Kechriotis; E. Zervas; E. S. Manolakos

1994-01-01

351

Adaptive MAC Protocol for UAV Communication Networks Using Directional Antennas  

E-print Network

Adaptive MAC Protocol for UAV Communication Networks Using Directional Antennas Abdel Ilah Alshbatat and Liang Dong, Senior Member, IEEE Abstract-- Unmanned aerial vehicle (UAV) has been used inspection and range extension. Moreover, UAVs are suited for situations that are too dangerous for direct

Dong, Liang

352

Generating UAV Communication Networks for Monitoring and Surveillance  

E-print Network

Generating UAV Communication Networks for Monitoring and Surveillance Per-Magnus Olsson, Jonas, especially when smaller UAVs are used. Both problems can be solved to creating relay chains for surveillance different trade-offs between the number of UAVs in the chain and the chain's cost. We also show new results

Doherty, Patrick

353

Electronic Communication Systems and Social Networking Employee Social Media Policy  

E-print Network

Electronic Communication Systems and Social Networking Employee Social Media Policy The Fogelman impact. Beware of comments that could reflect poorly on you and the College. Social media sites/or bullying apply to content posted online. Violating any University policy while using social media could

Dasgupta, Dipankar

354

An Application Dependent Communication Protocol for Wireless Sensor Networks  

Microsoft Academic Search

A wireless sensor network consists of a number of sensors spread across a geographical area. These battery powered sensors have limited source of energy. Hence, energy efficiency becomes a key design issue. We propose an Application Dependent Communication Protocol (ADCP) based on the concept of Aggregation-aware Minimum Spanning Tree (AMST) which takes into account the aggregation capabilities of sensors and

Tarun Bansal; Pankaj Ghanshani; Ramesh Chandra Joshi

2006-01-01

355

Performance of power electronic interfaced DERs integrated with communication network  

Microsoft Academic Search

In this paper, the performance of power elec- tronic interfaced distributed energy resources (DERs) operating with communication network is investigated. The application of power electronic interface is required, for system operation and control while achieving a stable system with high power quality. In a smart grid scenario, due to the dependency of data acquisi- tion, protection and control, an integrated

Ritwik Majumder; Gargi Bag; Saikat Chakrabarti

2011-01-01

356

CSE/EE 458: Data Communication (Wide-Area Networks)  

E-print Network

@cse.psu.edu) Circuit Switching · Dedicated communication path between two stations · Three phases ­ Establish, Transfer is wasted · Connection setup takes time, once connected, transfer is transparent, developed for voice & Engineering 310 Pond Lab gcao@cse.psu.edu 2 Switching Networks · End devices are stations ­ Computer, terminal

Cao, Guohong

357

ICEBERG: an Internet core network architecture for integrated communications  

Microsoft Academic Search

In the ICEBERG project at UC Berkeley, we are developing an Internet-based integration of telephony and data services spanning diverse access networks. Our primary goals are extensibility, scalability, robustness, and personalized communication. We leverage the Internet's low cost of entry for service creation, provision, deployment, and integration. We present our solutions to signaling, easy service creation, resource reservation, admission control,

Helen J. Wang; Bhaskaran Raman; Chen-Nee Chuah; Rahul Biswas; Ramakrishna Gummadi; Barbara Hohlt; Xia Hong; Emre Kiciman; Zhuoqing Mao; Jimmy S. Shih; L. Subraimanian; B. Y. Zhno; Anthony D. Joseph; Randy H. Katz

2000-01-01

358

Economics of logarithmic Quality-of-Experience in communication networks  

Microsoft Academic Search

Utility functions, describing the value of a good or a resource from an end user's point of view, are widely used as an important ingredient for all sorts of microeconomic models. In the context of resource allocation in communication networks, a logarithmic form of utility usually serves as the standard example due to its simplicity and mathematical tractability, with the

Peter Reichl; Bruno Tuffin; Raimund Schatz

2010-01-01

359

Congestion Pricing and Noncooperative Games in Communication Networks  

Microsoft Academic Search

We consider congestion pricing as a mechanism for sharing bandwidth in communication networks, and model the interaction among the users as a game. We propose a decentralized algorithm for the users that is based on the history of the price process, where user response to congestion prices is analogous to \\

Ayalvadi J. Ganesh; Koenraad Laevens; Richard Steinberg

2007-01-01

360

Compensating for Unreliable Communication Links in Networked Control Systems  

E-print Network

Compensating for Unreliable Communication Links in Networked Control Systems ERIK HENRIKSSON, Kungliga Tekniska högskolan, Osquldas väg 6, Stockholm. © Erik Henriksson, september 2009 Tryck main advisor Karl Henrik Johansson for taking me on as his Ph.D. student. Your enthusiasm is contagious

Johansson, Karl Henrik

361

Role of Communication Networks in Behavioral Systems Analysis  

ERIC Educational Resources Information Center

This article provides an overview of communication networks and the role of verbal behavior in behavioral systems analysis. Our discussion highlights styles of leadership in the design and implementation of effective organizational contingencies that affect ways by which coordinated work practices are managed. We draw upon literature pertaining to…

Houmanfar, Ramona; Rodrigues, Nischal Joseph; Smith, Gregory S.

2009-01-01

362

Workshop on Wireless Networks & Communication Dhaka, Bangladesh, 2013  

E-print Network

WNC 2013 Workshop on Wireless Networks & Communication Dhaka, Bangladesh, 2013 Proceedings Department of Computer Science and Engineering Bangladesh University of Engineering and Technology (BUET) #12 Project, Bangladesh Parliament) 4:00pm ­ 4:30pm Prayer and Tea break 4:30pm ­ 6:00pm Poster Session 6.00pm

Rahman, A.K.M. Ashikur

363

Energy-Efficient Communication Protocol for Wireless Microsensor Networks  

Microsoft Academic Search

Wireless distributed microsensor systems will enable the reliable monitoring of a variety of environments for both civil and military applications. In this paper, we look at communication protocols, which can have significant im- pact on the overall energy dissipation of these networks. Based on our findings that the conventional protocols of direct transmission, minimum-transmission-energy, multi- hop routing, and static clustering

Wendi Rabiner Heinzelman; Anantha Chandrakasan; Hari Balakrishnan

2000-01-01

364

Responder Communication Networks in the World Trade Center Disaster: Implications for Modeling of Communication Within Emergency Settings  

Microsoft Academic Search

Using archival materials obtained from the Port Authority of New York and New Jersey, we analyze networks of communication and interaction among responders to the World Trade Center disaster. Our findings indicate substantial variability in individual radio communication system usage, with both communication volume and number of partners exhibiting distributions with long upper tails. Responder communication patterns are well-described by

CARTER T. BUTTS; MIRUNA PETRESCU-PRAHOVA; B. REMY CROSS

2007-01-01

365

Complex Dynamics of Autonomous Communication Networks and the Intelligent Communication Paradigm  

E-print Network

Dynamics of arbitrary communication system is analysed as unreduced interaction process. The applied generalised, universally nonperturbative method of effective potential reveals the phenomenon of dynamic multivaluedness of competing system configurations forced to permanently replace each other in a causally random order, which leads to universally defined dynamical chaos, complexity, fractality, self-organisation, and adaptability (physics/9806002, physics/0211071, physics/0405063). We demonstrate the origin of huge, exponentially high efficiency of the unreduced, complex network dynamics and specify the universal symmetry of complexity (physics/0404006) as the fundamental guiding principle for creation and control of such qualitatively new kind of networks and devices. The emerging intelligent communication paradigm and its practical realisation in the form of knowledge-based networks involve the features of true, unreduced intelligence and consciousness (physics/0409140) appearing in complex (multivalued) network dynamics and results.

Andrei P. Kirilyuk

2004-12-09

366

Wavelength Assignment in Optical Networks with Imprecise Network State Information  

E-print Network

Wavelength Assignment in Optical Networks with Imprecise Network State Information Satyajeet Ahuja The University of Arizona {ahuja, krunz, srini}@ece.arizona.edu Abstract-- Efficient routing and wavelength assignment (RWA) in wavelength-routed all-optical networks is critical for achieving high efficiency over

Ramasubramanian, Srinivasan

367

Sustainable patient information network (SPaIN) for primary care health center in Indonesia  

Microsoft Academic Search

Sustainable patient information network for primary care health center is needed for Indonesia. There are many of remote, isolated or urban area, which causes transportation problems and telecommunication problems, for example: necessity of wireless infrastructure. The Internet and its free software is the main agent for this system combining with information and communication technology. We develop low speed communication system

I. T. Pambudi; T. Hayasaka; T. Tsubota; S. Wada; T. Yamaguchi

2003-01-01

368

Communications, Navigation, and Network Reconfigurable Test-bed Flight Hardware Compatibility Test S  

NASA Technical Reports Server (NTRS)

Communications, Navigation, and Network Reconfigurable Test-bed Flight Hardware Compatibility Test Sets and Networks Integration Management Office Testing for the Tracking and Data Relay Satellite System

2010-01-01

369

Securing against fraud in mobile communications : system design and development in 3G mobile networks  

E-print Network

Network security ensures the consistency, integrity, and reliability of telecommunications systems. Authorized network access prevents fraudulent communications and maintains the availability of the systems. However, limited ...

Mochizuki, Yujiro, 1973-

2006-01-01

370

Tuning computer communications networks and protocols  

SciTech Connect

Current computer network protocols are very robust and capable of being used in a variety of different environments. Typically, the implementations of these protocols come to the user with preset parameters that provide reasonable performance for low delay- bandwidth product environments with low error rates, but these defaults do not necessarily provide optimal performance for high delay-bandwidth, high error rate environments. To provide optimal performance from the user's perspective, which is application to application, all equivalent layers of the protocol must be tuned. The key to tuning protocols is reducing idle time on the links caused by various protocol layers waiting for acknowledgments. The circuit bandwidth, propagation delay, error rate, number of outstanding packets, buffer length, number of buffers, and buffer size can all affect the observed idle time. Experiments have been conducted on test bed systems, and on live satellite and terrestrial circuits. Observations from these experiments led the authors to draw conclusions about the locations of common bottlenecks. Various aspects of network tuning and certain specific issues relating to the tuning of three protocols (DECnet, TCP/IP, NETEX) over various media types (point-to-point and broadcast) under several different conditions (terrestrial and satellite) are examined in this paper. Also described are the lessons learned about protocol and network tuning. 3 refs., 2 tabs.

Witzke, E.L. (Proteus Corp., Albuquerque, NM (USA)); Pierson, L.G. (Sandia National Labs., Albuquerque, NM (USA))

1991-01-01

371

Next generation information communication infrastructure and case studies for future power systems  

NASA Astrophysics Data System (ADS)

As power industry enters the new century, powerful driving forces, uncertainties and new functions are compelling electric utilities to make dramatic changes in their information communication infrastructure. Expanding network services such as real time measurement and monitoring are also driving the need for more bandwidth in the communication network. These needs will grow further as new remote real-time protection and control applications become more feasible and pervasive. This dissertation addresses two main issues for the future power system information infrastructure: communication network infrastructure and associated power system applications. Optical networks no doubt will become the predominant data transmission media for next generation power system communication. The rapid development of fiber optic network technology poses new challenges in the areas of topology design, network management and real time applications. Based on advanced fiber optic technologies, an all-fiber network is investigated and proposed. The study will cover the system architecture and data exchange protocol aspects. High bandwidth, robust optical networks could provide great opportunities to the power system for better service and efficient operation. In the dissertation, different applications are investigated. One of the typical applications is the SCADA information accessing system. An Internet-based application for the substation automation system will be presented. VLSI (Very Large Scale Integration) technology is also used for one-line diagrams auto-generation. High transition rate and low latency optical network is especially suitable for power system real time control. In the dissertation, a new local area network based Load Shedding Controller (LSC) for isolated power system will be presented. By using PMU (Phasor Measurement Unit) and fiber optic network, an AGE (Area Generation Error) based accurate wide area load shedding scheme will also be proposed. The objective is to shed the load in the limited area with minimum disturbance.

Qiu, Bin

372

Variable-Base Tacit Communication: A New Energy Efficient Communication Scheme for Sensor Networks  

E-print Network

]). Such a scheme of Communication through Silence (CtS), while reducing energy consumption for sensor nodes National Natural Science Foundation of China. Communication through Silence (CtS). In CtS, instead of using of a period of time to convey information. For example, in order to transmit value 97 between, a 7-bit string

Chen, Yuanzhu Peter

373

Test experience on an ultrareliable computer communication network  

NASA Technical Reports Server (NTRS)

The dispersed sensor processing mesh (DSPM) is an experimental, ultrareliable, fault-tolerant computer communications network that exhibits an organic-like ability to regenerate itself after suffering damage. The regeneration is accomplished by two routines - grow and repair. This paper discusses the DSPM concept for achieving fault tolerance and provides a brief description of the mechanization of both the experiment and the six-node experimental network. The main topic of this paper is the system performance of the growth algorithm contained in the grow routine. The characteristics imbued to DSPM by the growth algorithm are also discussed. Data from an experimental DSPM network and software simulation of larger DSPM-type networks are used to examine the inherent limitation on growth time by the growth algorithm and the relationship of growth time to network size and topology.

Abbott, L. W.

1984-01-01

374

Test experience on an ultrareliable computer communication network  

NASA Technical Reports Server (NTRS)

The dispersed sensor processing mesh (DSPM) is an experimental, ultra-reliable, fault-tolerant computer communications network that exhibits an organic-like ability to regenerate itself after suffering damage. The regeneration is accomplished by two routines - grow and repair. This paper discusses the DSPM concept for achieving fault tolerance and provides a brief description of the mechanization of both the experiment and the six-node experimental network. The main topic of this paper is the system performance of the growth algorithm contained in the grow routine. The characteristics imbued to DSPM by the growth algorithm are also discussed. Data from an experimental DSPM network and software simulation of larger DSPM-type networks are used to examine the inherent limitation on growth time by the growth algorithm and the relationship of growth time to network size and topology.

Abbott, L. W.

1984-01-01

375

The 30/20 GHz communications satellite trunking network study  

NASA Technical Reports Server (NTRS)

Alternative transmission media for a CONUS-wide trunking network in the years 1990 and 2000 are examined. The alternative technologies comprised fiber optic cable, conventional C- and Ku-band satellites, and 30/20 GHz satellites. Three levels of implementation were considered - a 10-city network, a 20-city network, and a 40-city network. The cities selected were the major metropolitan areas with the greatest communications demand. All intercity voice, data, and video traffic carried more than 40 miles was included in the analysis. In the optimized network, traffic transmitted less than 500 miles was found to be better served by fiber optic cable in 1990. By the year 2000, the crossover point would be down to 200 miles, assuming availability of 30/20 GHz satellites.

Kolb, W.

1981-01-01

376

Satellite communications for the next generation telecommunication services and networks  

NASA Technical Reports Server (NTRS)

Satellite communications can play an important role in provisioning the next-generation telecommunication services and networks, provided the protocols specifying these services and networks are satellite-compatible and the satellite subnetworks, consisting of earth stations interconnected by the processor and the switch on board the satellite, interwork effectively with the terrestrial networks. The specific parameters and procedures of frame relay and broadband integrated services digital network (B-ISDN) protocols which are impacted by a satellite delay. Congestion and resource management functions for frame relay and B-ISDN are discussed in detail, describing the division of these functions between earth stations and on board the satellite. Specific onboard and ground functions are identified as potential candidates for their implementation via neural network technology.

Chitre, D. M.

1991-01-01

377

A Queueing Network Analysis of Computer Communication Networks with Window Flow Control  

Microsoft Academic Search

A computer communication network with window flow control is modeled by a closed multichain queueing network. The severe computational limitation of previous solution algorithms is overcome with a heuristic derived from the recently found mean value analysis. A large numerical example is given.

MARTIN REISER

1979-01-01

378

Networked sensors for the future force (NSFF) advanced technology demonstration (ATD) communications systems  

NASA Astrophysics Data System (ADS)

The U.S. Army"s Future Combat Systems (FCS) and Future Force Warrior (FFW) will rely on the use of unattended, tactical sensors to detect and identify enemy targets in order to avoid enemy fires and enable precise networked fire to survive on the future battlefield with less armor protection. Successful implementation of these critical sensor fields requires the development of a specialized communications network infrastructure needed to disseminate sensor data to provide relevant, timely and accurate situational awareness information to the tactical common operating picture. The sensor network communications must support both static deployed and mobile ground and air robotic sensor arrays with robust, secure, stealthy, and jam resistant links. It is envisioned that tactical sensor networks can be deployed in a two tiered communications architecture that includes a lower sensor sub-layer consisting of acoustic, magnetic, Chemical/Biological and seismic detectors and an upper sub-layer consisting of infrared or visual imaging cameras. The upper sub-layer can be cued by the lower sub-layer and provides a seamless gateway link to higher echelon backbone tactical networks. The NSFF Advanced Technology Demonstration (ATD) communications effort focuses on providing Future Force systems such as the FCS and the Future Force Warrior with critical situational awareness data needed for survivability. The communications systems supporting this functionality must be designed such that unattended ground sensor data can flow seamlessly from the lowest unattended tactical sensor echelons into the Army"s tactical backbone networks while also allowing the "fusing" of the data with other intelligence information for correlation within a tactical command and control node. NSFF is realizing this capability by using advanced communications technologies developed under the Soldier Level Integrated Communications Environment (SLICE) Soldier Radio Waveform (SRW) project. These technologies include robust, self-organizing/healing networking protocols, energy management techniques, and stealthy, secure, jam resistant radio equipment for a significantly enhanced communications capability for the Joint Tactical Radio System (JTRS). CERDEC laboratory and field demonstrations in 2004 will be reviewed to show early SRW development in preparation for the NSFF ATD as well as development of affordable systems for disposable sensor applications

Nemeroff, Jay; DiPierro, Stefano

2005-05-01

379

On the Capacity of Information Networks  

Microsoft Academic Search

We present the rst non-trivial outer bound on the rate region of general information networks, answering a question of Song, Yeung and Cai. This outer bound combines properties of entropy with a strong information inequality derived from the structure of the network. This blend of information theoretic and graph theoretic arguments generates many interesting results. For example, we exactly characterize

380

Multimedia Information Networks in Social Media  

NASA Astrophysics Data System (ADS)

The popularity of personal digital cameras and online photo/video sharing community has lead to an explosion of multimedia information. Unlike traditional multimedia data, many new multimedia datasets are organized in a structural way, incorporating rich information such as semantic ontology, social interaction, community media, geographical maps, in addition to the multimedia contents by themselves. Studies of such structured multimedia data have resulted in a new research area, which is referred to as Multimedia Information Networks. Multimedia information networks are closely related to social networks, but especially focus on understanding the topics and semantics of the multimedia files in the context of network structure. This chapter reviews different categories of recent systems related to multimedia information networks, summarizes the popular inference methods used in recent works, and discusses the applications related to multimedia information networks. We also discuss a wide range of topics including public datasets, related industrial systems, and potential future research directions in this field.

Cao, Liangliang; Qi, Guojun; Tsai, Shen-Fu; Tsai, Min-Hsuan; Pozo, Andrey Del; Huang, Thomas S.; Zhang, Xuemei; Lim, Suk Hwan

381

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.

382

"I'll See You on IM, Text, or Call You": A Social Network Approach of Adolescents' Use of Communication Media  

ERIC Educational Resources Information Center

This study explores some possibilities of social network analysis for studying adolescents' communication patterns. A full network analysis was conducted on third-grade high school students (15 year olds, 137 students) in Belgium. The results pointed out that face-to-face communication was still the most prominent way for information to flow…

Van Cleemput, Katrien

2010-01-01

383

Protocol for a Delay-Tolerant Data-Communication Network  

NASA Technical Reports Server (NTRS)

As its name partly indicates, the Delay-Tolerant Networking (DTN) Bundle Protocol is a protocol for delay-tolerant transmission of data via communication networks. This protocol was conceived as a result of studies of how to adapt Internet protocols so that Internet-like services could be provided across interplanetary distances in support of deep-space exploration. The protocol, and software to implement the protocol, is being developed in collaboration among experts at NASA's Jet Propulsion Laboratory and other institutions. No current Internet protocols can accommodate long transmission delay times or intermittent link connectivity. The DTN Bundle Protocol represents a departure from the standard Internet assumption that a continuous path is available from a host computer to a client computer: It provides for routing of data through networks that may be disjointed and may be characterized by long transmission delays. In addition to networks that include deepspace communication links, examples of such networks include terrestrial ones within which branches are temporarily disconnected. The protocol is based partly on the definition of a message-based overlay above the transport layers of the networks on which it is hosted.

Torgerson, Jordan; Hooke, Adrian; Burleigh, Scott; Fall, Kevin

2004-01-01

384

Communicating Cancer Risk Information: The Challenges of Uncertainty.  

ERIC Educational Resources Information Center

Accurate and sensitive communication of cancer-risk information is important. Based on a literature review of 75 research reports, expert opinion papers, and clinical protocols, a synthesis of what is known about the communication of cancer-risk information is presented. Relevance of information to those not tested is discussed. (Author/EMK)

Bottorff, Joan L.; Ratner, Pamela A.; Johnson, Joy L.; Lovato, Chris Y.; Joab, S. Amanda

1998-01-01

385

Communication networks and loser effects interact to influence the outcome of aggressive interactions in  

E-print Network

Communication networks and loser effects interact to influence the outcome of aggressive. Specifically, loser effects have a greater influence on fight dynamics than elements of communication networks social history may be masking any effects that visual communication networks have on agonistic behaviour

Moore, Paul A.

386

Distributed Average Consensus in Sensor Networks with Random Link Failures and Communication Channel Noise  

Microsoft Academic Search

In this paper we study distributed average consensus type algorithms in sensor networks with random network link failures and communication channel. Specifically, the network links fail randomly across iterations, and communication through an active link incurs additive stochastic noise. We consider the A - ND algorithm for distributed average consensus under such imperfect communication scenario. Using results from the theory

S. Kar; J. M. F. Moura

2007-01-01

387

Communications and Networking for Smart Grid: Technology and Practice , HossamS. Hassanein2  

E-print Network

Editorial Communications and Networking for Smart Grid: Technology and Practice Chi Zhou1 , Hossam for Smart Grid research and development, so the communications networks in Smart Grid must facilitate communications protocols, and provide secure and reliable communications for the smart grid. Many open issues

Qiu, Robert Caiming

388

Enabling information management systems in tactical network environments  

NASA Astrophysics Data System (ADS)

Net-Centric Information Management (IM) and sharing in tactical environments promises to revolutionize forward command and control capabilities by providing ubiquitous shared situational awareness to the warfighter. This vision can be realized by leveraging the tactical and Mobile Ad hoc Networks (MANET) which provide the underlying communications infrastructure, but, significant technical challenges remain. Enabling information management in these highly dynamic environments will require multiple support services and protocols which are affected by, and highly dependent on, the underlying capabilities and dynamics of the tactical network infrastructure. In this paper we investigate, discuss, and evaluate the effects of realistic tactical and mobile communications network environments on mission-critical information management systems. We motivate our discussion by introducing the Advanced Information Management System (AIMS) which is targeted for deployment in tactical sensor systems. We present some operational requirements for AIMS and highlight how critical IM support services such as discovery, transport, federation, and Quality of Service (QoS) management are necessary to meet these requirements. Our goal is to provide a qualitative analysis of the impact of underlying assumptions of availability and performance of some of the critical services supporting tactical information management. We will also propose and describe a number of technologies and capabilities that have been developed to address these challenges, providing alternative approaches for transport, service discovery, and federation services for tactical networks.

Carvalho, Marco; Uszok, Andrzej; Suri, Niranjan; Bradshaw, Jeffrey M.; Ceccio, Philip J.; Hanna, James P.; Sinclair, Asher

2009-05-01

389

Information sharing in quantum complex networks  

NASA Astrophysics Data System (ADS)

We introduce the use of entanglement entropy as a tool for studying the amount of information shared between the nodes of quantum complex networks. By considering the ground state of a network of coupled quantum harmonic oscillators, we compute the information that each node has on the rest of the system. We show that the nodes storing the largest amount of information are not the ones with the highest connectivity, but those with intermediate connectivity, thus breaking down the usual hierarchical picture of classical networks. We show both numerically and analytically that the mutual information characterizes the network topology. As a by-product, our results point out that the amount of information available for an external node connecting to a quantum network allows one to determine the network topology.

Cardillo, Alessio; Galve, Fernando; Zueco, David; Gómez-Gardeñes, Jesús

2013-05-01

390

Good Communication: The Other Social Network for Successful IT Organizations  

ERIC Educational Resources Information Center

Social networks of the electronic variety have become thoroughly embedded in contemporary culture. People have woven these networks into their daily routines, using Facebook, Twitter, LinkedIn, online gaming environments, and other tools to build and maintain complex webs of professional and personal relationships. Chief Information Officers…

Trubitt, Lisa; Overholtzer, Jeff

2009-01-01

391

Photon information efficient communication through atmospheric turbulence  

E-print Network

High photon-efficiency (many bits/photon) optical communication is possible with pulse-position modulation and direct detection, and high spectral efficiency (many bits/sec-Hz) optical communication is possible with ...

Chandrasekaran, Nivedita

392

[Research on Zhejiang blood information network and management system].  

PubMed

This research was aimed to develop the first level blood information centralized database and real time communication network at a province area in China. Multiple technology like local area network database separate operation, real time data concentration and distribution mechanism, allopatric backup, and optical fiber virtual private network (VPN) were used. As a result, the blood information centralized database and management system were successfully constructed, which covers all the Zhejiang province, and the real time exchange of blood data was realised. In conclusion, its implementation promote volunteer blood donation and ensure the blood safety in Zhejiang, especially strengthen the quick response to public health emergency. This project lays the first stone of centralized test and allotment among blood banks in Zhejiang, and can serve as a reference of contemporary blood bank information systems in China. PMID:17490550

Yan, Li-Xing; Xu, Yan; Meng, Zhong-Hua; Kong, Chang-Hong; Wang, Jian-Min; Jin, Zhen-Liang; Wu, Shi-Ding; Chen, Chang-Shui; Luo, Ling-Fei

2007-02-01

393

COMMUNICATION SKILLS USED BY INFORMATION SYSTEMS GRADUATES  

Microsoft Academic Search

Communication skills are consistently ranked as the most important skills for success by top executives. Effective communication is an essential component of organizational success. One estimate is that employees spend more than 75 percent of their time communicating in interpersonal situations, as well as on a variety of other levels within the organization and externally (7). Crucial to the future

Nancy Csapo; Richard D. Featheringham

394

Sailor: Maryland's Online Public Information Network  

NSDL National Science Digital Library

Sailor - Maryland's Information Network - provides general Maryland government information and a wide variety of Internet jump-points. The gopher is run by the Pratt Free Library and also has local dialup numbers in Maryland.

1999-01-01

395

Progress Toward Standards for the Seamless Interoperability of Broadband Satellite Communication Networks  

NASA Technical Reports Server (NTRS)

The realization of the full potential of the National Information Infrastructure (NH) and Global Information Infrastructure (GII) requires seamless interoperability of emerging satellite networks with terrestrial networks. This requires a cooperative effort between industry, academia and government agencies to develop and advocate new, satellite-friendly communication protocols and modifications to existing communication protocol standards. These groups have recently come together to actively participating in a number of standards making bodies including: the Internet Engineering Task Force (IETF), the Asynchronous Transfer Mode (ATM) Forum, the International Telecommunication Union (ITU) and the Telecommunication Industry Association MA) to ensure that issues regarding efficient use of these protocols over satellite links are not overlooked. This paper will summarize the progress made toward standards development to achieve seamless integration and accelerate the deployment of multimedia applications.

Ivancic, William D.; Glover, Daniel R.; vonDeak, Thomas C.; Bhasin, Kul B.

1998-01-01

396

Practical issues in picture archiving and communication system and networking  

PubMed Central

Picture Archiving and Communication System (PACS) is a key workflow tool in the functioning of radiology departments worldwide, today, and its utilization is rapidly growing in India. The key challenges in PACS implementation are related to vendor and feature selection, integration with the existing HIS, user training, maintenance and scalability to meet increasing demands. Additionally, the networking requirements that PACS imposes on hospital networks are not insignificant. This article attempts to review these issues from the standpoint of what a prospective or new user needs to know. PMID:20351983

Kalyanpur, Arjun; Singh, Jasbir; Bedi, Ricky

2010-01-01

397

College of Engineering, Boston University Spring 2013 EC541 Computer Communication Networks  

E-print Network

College of Engineering, Boston University Spring 2013 EC541 Computer Communication Networks of fundamental concepts in computer networking o Queueing and delay models in communication networks o Little references: · S. Keshav, An engineering approach to computer networking, Addison-Wesley 1997 · L. Kleinrock

Goldberg, Bennett

398

GRASP WITH PATH-RELINKING FOR THE COOPERATIVE COMMUNICATION PROBLEM ON AD-HOC NETWORKS  

E-print Network

GRASP WITH PATH-RELINKING FOR THE COOPERATIVE COMMUNICATION PROBLEM ON AD-HOC NETWORKS C of maximizing the connection time between a set of mobile agents in an ad-hoc network. Given a network and a set COMMUNICATION ON AD-HOC NETWORKS is known to be NP-hard. We look for heuristic algorithms that are able

Resende, Mauricio G. C.

399

Tufts academic health information network: concept and scenario.  

PubMed Central

Tufts University School of Medicine's new health sciences education building, the Arthur M. Sackler Center for Health Communications, will house a modern medical library and computer center, classrooms, auditoria, and media facilities. The building will also serve as the center for an information and communication network linking the medical school and adjacent New England Medical Center, Tufts' primary teaching hospital, with Tufts Associated Teaching Hospitals throughout New England. Ultimately, the Tufts network will join other gateway networks, information resource facilities, health care institutions, and medical schools throughout the world. The center and the network are intended to facilitate and improve the education of health professionals, the delivery of health care to patients, the conduct of research, and the implementation of administrative management approaches that should provide more efficient utilization of resources and save dollars. A model and scenario show how health care delivery and health care education are integrated through better use of information transfer technologies by health information specialists, practitioners, and educators. PMID:3708191

Stearns, N S

1986-01-01

400

Tufts academic health information network: concept and scenario.  

PubMed

Tufts University School of Medicine's new health sciences education building, the Arthur M. Sackler Center for Health Communications, will house a modern medical library and computer center, classrooms, auditoria, and media facilities. The building will also serve as the center for an information and communication network linking the medical school and adjacent New England Medical Center, Tufts' primary teaching hospital, with Tufts Associated Teaching Hospitals throughout New England. Ultimately, the Tufts network will join other gateway networks, information resource facilities, health care institutions, and medical schools throughout the world. The center and the network are intended to facilitate and improve the education of health professionals, the delivery of health care to patients, the conduct of research, and the implementation of administrative management approaches that should provide more efficient utilization of resources and save dollars. A model and scenario show how health care delivery and health care education are integrated through better use of information transfer technologies by health information specialists, practitioners, and educators. PMID:3708191

Stearns, N S

1986-04-01

401

Junior / Community College Students with Learning Disabilities and Their Use of Information and Communication Technologies (ICTs)  

ERIC Educational Resources Information Center

Junior / community college students who have learning disabilities (LD), such as dyslexia, often do not maximize their use of information and communication technologies (ICTs) for school work. They do not use many of these technologies nor do they know as much about them as other students. These are the results of an Adaptech Research Network

Nguyen, Mai Nhu; Fichten, Catherine; King, Laura; Barile, Maria; Mimouni, Zohra; Havel, Alice; Raymond, Odette; Juhel, Jean-Charles; Jorgensen, Shirley; Chauvin, Alexandre; Gutberg, Jennifer; Budd, Jillian; Hewlett, Maureen; Heiman, Tali; Gaulin, Chris; Asuncion, Jennison

2013-01-01

402

Employing Ad-Hoc Networking with Aerial Communications Nodes for Wireless Tactical Experimentation  

Microsoft Academic Search

Today's COTS (commercial off-the-shelf) technologies possess the functionality to support the information and knowledge needs of the military. Text messaging, voice over IP (VoIP), portals and collaboration tools such as video conferencing, are relatively mature and widely used in the commercial arena. Broadband communications such as WiFi and WiMAX, coupled with technologies like mobile ad-hoc networking (MANET), are also likely

Yuen-Chong Chim; Kwang-Wee Seah; Soon-Lian Sim; K.-L. Khoo; Y.-S. Lee; Yu.-C. Foo; YIng-Cheung Lai

2006-01-01

403

Informational Benefits via Knowledge Networks among Farmers  

ERIC Educational Resources Information Center

Purpose: This research aimed to obtain insights into how farmers on small and medium-sized farms perceived the benefits of the information they receive from their interpersonal networks and other sources. Design/methodology/approach: Farmers' information environments were explored using socio-spatial knowledge networks, diaries and in-depth…

Sligo, F. X.; Massey, Claire; Lewis, Kate

2005-01-01

404

Complexity classification of network information flow problems  

Microsoft Academic Search

We address the network information flow problem, in which messages available to a set of sources must be passed through a network to a set of sinks with specified demands. This differs from traditional multicommodity flow, because information can be duplicated and encoded. Previous work has focused on the special case of multicasting using linear coding. In this paper, we

April Rasala Lehman; Eric Lehman

2004-01-01

405

Influence of a network structure on the network effect in the communication service market  

NASA Astrophysics Data System (ADS)

In this study, we analyze the network effect in a model of a personal communication market, by using a multi-agent based simulation approach. We introduce into the simulation model complex network structures as the interaction patterns of agents. With complex network models, we investigate the dynamics of a market in which two providers are competing. We also examine the structure of networks that affect the complex behavior of the market. By a series of simulations, we show that the structural properties of complex networks, such as the clustering coefficient and degree correlation, have a major influence on the dynamics of the market. We find that the network effect is increased if the interaction pattern of agents is characterized by a high clustering coefficient, or a positive degree correlation. We also discuss a suitable model of the interaction pattern for reproducing market dynamics in the real world, by performing simulations using real data of a social network.

Uchida, Makoto; Shirayama, Susumu

2008-09-01

406

Gigabit Satellite Network for NASA's Advanced Communication Technology Satellite (ACTS)  

NASA Technical Reports Server (NTRS)

The advanced communication technology satellite (ACTS) gigabit satellite network provides long-haul point-to-point and point-to-multipoint full-duplex SONET services over NASA's ACTS. at rates up to 622 Mbit/s (SONET OC-12), with signal quality comparable to that obtained with terrestrial fiber networks. Data multiplexing over the satellite is accomplished using time-division multiple access (TDMA) techniques coordinated with the switching and beam hopping facilities provided by ACTS. Transmissions through the satellite are protected with Reed-Solomon encoding. providing virtually error-free transmission under most weather conditions. Unique to the system are a TDMA frame structure and satellite synchronization mechanism that allow: (a) very efficient utilization of the satellite capacity: (b) over-the-satellite dosed-loop synchronization of the network in configurations with up to 64 ground stations: and (c) ground station initial acquisition without collisions with existing signalling or data traffic. The user interfaces are compatible with SONET standards, performing the function of conventional SONET multiplexers and. as such. can be: readily integrated with standard SONET fiber-based terrestrial networks. Management of the network is based upon the simple network management protocol (SNMP). and includes an over-the-satellite signalling network and backup terrestrial internet (IP-based) connectivity. A description of the ground stations is also included.

Hoder, Douglas; Bergamo, Marcos

1996-01-01

407

Traffic management of a satellite communication network using stochastic optimization.  

PubMed

The performance of nonhierarchical circuit switched networks at moderate load conditions is improved when alternate routes are made available. Alternate routes, however, introduce instability under heavy and overloaded conditions, and under these load conditions network performance is found to deteriorate. To alleviate this problem, a control mechanism is used where, a fraction of the capacity of each link is reserved for direct routed calls. In this work, a traffic management scheme is developed to enhance the performance of a mesh-connected, circuit-switched satellite communication network. The network load is measured and the network is continually adapted by reconfiguring the map to suit the current traffic conditions. The routing is performed dynamically. The reconfiguration of the network is done by properly allocating the capacity of each link and placing an optimal reservation on each link. The optimization is done by using two neural network-based optimization techniques: simulated annealing and mean field annealing. A comparative study is done between these two techniques. The results from the simulation study show that this method of traffic management performs better than the pure dynamic routing with a fixed configuration. PMID:18263468

Ansari, N; Arulambalam, A; Balasekar, S

1996-01-01

408

Developing a Conceptual Unmanned Aerial Vehicle Communications Mobile AD Hoc Network Simulation Model.  

National Technical Information Service (NTIS)

A growing demand for increased networking interoperability has spawned a requirement for ad hoc networking. One proposal to satisfy the need is development of Unmanned Aerial Vehicle (UAV) communications Mobile Ad Hoc Networks (NANET) . In order to establ...

H. L. Blackshear

2002-01-01

409

TeCFlow - A Temporal Communication Flow Visualizer for Social Network Analysis  

Microsoft Academic Search

This paper introduces an approach for organizational redesign and optimization of communication flows based on temporal analysis of communication patterns in groups of people. Our Temporal Communication Flow Visualizer automatically generates interactive movies of communication flows among individuals by mining e- mail log files and other communication archives. Combining those movies with measures of social network analysis such as the

Peter A. Gloor; Yan Zhao

410

Failure restoration of mobility databases for personal communication networks  

Microsoft Academic Search

This paper studies failure restoration of mobilitydatabases for personal communication networks(specifically, VLRs and HLRs). We model the VLRrestoration with and without checkpointing. The optimalVLR checkpointing interval is derived to balancethe checkpointing cost against the paging cost. Wealso model GSM periodic location updating (locationconfirmation) to quantify the relationship between thelocation confirmation frequency and the number oflost calls.The HLR failure restoration...

Yi-bing Lin

1995-01-01

411

Wavelets in Source Coding, Communications, and Networks: An Overview  

Microsoft Academic Search

The use of wavelets in the broad areas of source coding, communications, and networks is surveyed. Specifically, the impact of wavelets and wavelet theory in image coding, video coding, image interpolation, image-adaptive lifting transforms, multiple-description coding, and joint source-channel coding is overviewed. Recent contributions in these areas arising in the subsequent papers of the present special issue are described. I.

James E. Fowler

412

Fault-tolerant control of process systems using communication networks  

Microsoft Academic Search

A methodology for the design of fault-tolerant control systems for chemical plants with distributed interconnected processing units is presented. Bringing together tools from Lyapunov-based nonlinear control and hybrid systems theory, the approach is based on a hierarchical architecture that integrates lower-level feedback control of the individual units with upper-level logic-based supervisory control over communication networks. The local control system for

Nael H. El-Farra; Adiwinata Gani; Panagiotis D. Christofides

2005-01-01

413

Technology developments integrating a space network communications testbed  

NASA Technical Reports Server (NTRS)

As future manned and robotic space explorations missions involve more complex systems, it is essential to verify, validate, and optimize such systems through simulation and emulation in a low cost testbed environment. The goal of such a testbed is to perform detailed testing of advanced space and ground communications networks, technologies, and client applications that are essential for future space exploration missions. We describe the development of new technologies enhancing our Multi-mission Advanced Communications Hybrid Environment for Test and Evaluation (MACHETE) that enables its integration in a distributed space communications testbed. MACHETE combines orbital modeling, link analysis, and protocol and service modeling to quantify system performance based on comprehensive considerations of different aspects of space missions.

Kwong, Winston; Jennings, Esther; Clare, Loren; Leang, Dee

2006-01-01

414

Freshmen Engagement Through Communication: Predicting Friendship Formation Strategies and Perceived Availability of Network Resources From Communication Skills  

Microsoft Academic Search

First-time freshmen completed communication skills questionnaires at the beginning of a fall semester. Approximately 6 weeks later they completed another questionnaire regarding friendship formation strategies and the perceived availability of resources from their new social network. Results suggest that different profiles of communication skills predicted how much freshmen reported using group involvement, online social networking, disclosure, responsiveness, and invitations as

Bree McEwan; Laura K. Guerrero

2010-01-01

415

Cooperative Planning for UAS-based Sensor Networks In Realistic Communication Environments  

NASA Astrophysics Data System (ADS)

This dissertation develops a unified, tractable algorithm for distributed planning for multiple unmanned aircraft based sensor networks with performance bounds. An information-theoretic objective function is derived that incorporates sensing and communication to guide a cooperative team of unmanned aircraft. The communication is modelled with packet erasure channels for each link in a multi-hop mesh network. This objective is shown to be intractable and assumptions are made to find a tractable formulation. This tractable formulation is then distributed using the chain rule of mutual information and optimization algorithms are designed with performance bounds for different scenarios and compared against the fully centralized mutual information approach. This comparison is done analytically using submodularity under certain assumptions and Monte Carlo simulations to evaluate the algorithms when these assumptions break down. A novel unmanned aircraft system platform was developed to facilitate experiments with multiple unmanned aircraft utilizing sensing and multi-hop mesh networking. This system was used to perform localization experiments of radio frequency emitters based on the received signal strength measurement. The planning algorithms were demonstrated with multiple aircraft to show there validity and tractability on a real world scenario. These experiments were used to asses the algorithms performance showing the improvement in sensing is appreciable and specifically the benefits of utilizing multi-hop communication.

Stachura, M.

416

Modern Aspects of Communication in Education of Teachers Using New Information and Communication Technologies (ICT)  

ERIC Educational Resources Information Center

This work deals with the need of introducing modern aspects of communication on higher education of future teachers using information and communication technologies. The emphasis is put on the importance for future teachers to have basic information science knowledge and skills and their preparations for using ICT. A growth of the number of…

Tatkovic, Nevenka; Sehanovic, Jusuf; Ruzic, Maja

2005-01-01

417

Quantum Key Distribution in Large Scale Quantum Network Assisted by Classical Routing Information  

NASA Astrophysics Data System (ADS)

Recently, small-scale Quantum Key Distribution (QKD) networks have been demonstrated and continuously operated in field environment. However, nodes of these QKD networks are less than 10 nodes. When the scale and structure of these networks becomes large and complex, such networks will subject to problem of intractable routing selection and limited transmission distance. We present a novel quantum network model and the corresponding protocol to solve these problems. The proposed quantum network model integrates classical communication network with quantum key distribution layer. Nodes in this quantum network model are divided into communication nodes for classical communication and quantum nodes for quantum key distribution. We use atomic ensembles to create entangled photons inside quantum nodes. Quantum repeaters are used to establish entanglement between remote quantum nodes so the maximum distribution distance of entangled photons can be extended. The main idea is to establish an appropriate key distribution path in the quantum key distribution layer based on the routing information obtained by the upper classical communication network. After the entanglement has been established between remote quantum nodes, these nodes will use the Ekert91 or BBM92 protocol to generate secret keys shared between each other. Then, these keys can be used to ensure the security of communication in the classical communication network.

Wu, Diance; Yu, Wanrong; Zhao, Baokang; Wu, Chunqing

2014-10-01

418

Computing, Information, and Communications Technology (CICT) Program Overview  

NASA Technical Reports Server (NTRS)

The Computing, Information and Communications Technology (CICT) Program's goal is to enable NASA's Scientific Research, Space Exploration, and Aerospace Technology Missions with greater mission assurance, for less cost, with increased science return through the development and use of advanced computing, information and communication technologies

VanDalsem, William R.

2003-01-01

419

Fading Channels: Information-Theoretic and Communication Aspects  

Microsoft Academic Search

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Both single-user and

Ezio Biglieri; John G. Proakis; Shlomo Shamai

1998-01-01

420

Fading channels: information-theoretic and communications aspects  

Microsoft Academic Search

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Both single-user and

Ezio Biglieri; John Proakis; Shlomo Shamai

1998-01-01

421

Information and Communications Technologies Center (ICT) YouTube Channel  

NSDL National Science Digital Library

This page presents the YouTube channel of the National Center for Information and Communications Technologies (ICT Center). There is a growing collection of videos - focusing on information and communication technologies - on topics such as Second Life, the oscilloscope, digital media production, games and gaming, as well as a number of interviews with others in the telecommunications technology field.

2008-09-08

422

SECURITY AND COMMUNICATION NETWORKS Security Comm. Networks (2013)  

E-print Network

; security engineering; security ontology; domain-specific modelling; embedded systems; smart metering is represented in the form of an adapted information security ontology. Further, the elements of the ontology system engineer. A tool is developed to support the steps supporting this methodology and help to bridge

423

Noise enhances information transfer in hierarchical networks  

PubMed Central

We study the influence of noise on information transmission in the form of packages shipped between nodes of hierarchical networks. Numerical simulations are performed for artificial tree networks, scale-free Ravasz-Barabási networks as well for a real network formed by email addresses of former Enron employees. Two types of noise are considered. One is related to packet dynamics and is responsible for a random part of packets paths. The second one originates from random changes in initial network topology. We find that the information transfer can be enhanced by the noise. The system possesses optimal performance when both kinds of noise are tuned to specific values, this corresponds to the Stochastic Resonance phenomenon. There is a non-trivial synergy present for both noisy components. We found also that hierarchical networks built of nodes of various degrees are more efficient in information transfer than trees with a fixed branching factor. PMID:23390574

Czaplicka, Agnieszka; Holyst, Janusz A.; Sloot, Peter M. A.

2013-01-01

424

Information Spread of Emergency Events: Path Searching on Social Networks  

PubMed Central

Emergency has attracted global attentions of government and the public, and it will easily trigger a series of serious social problems if it is not supervised effectively in the dissemination process. In the Internet world, people communicate with each other and form various virtual communities based on social networks, which lead to a complex and fast information spread pattern of emergency events. This paper collects Internet data based on data acquisition and topic detection technology, analyzes the process of information spread on social networks, describes the diffusions and impacts of that information from the perspective of random graph, and finally seeks the key paths through an improved IBF algorithm. Application cases have shown that this algorithm can search the shortest spread paths efficiently, which may help us to guide and control the information dissemination of emergency events on early warning. PMID:24600323

Hu, Hongzhi; Wu, Tunan

2014-01-01

425

CISE Reorganization Information  

NSF Publications Database

... Foundation Home National Science Foundation - Computer Information Science Engineering (CISE) Search ... Computing & Communication Foundations (CCF) Computer & Network Systems (CNS) Information & ...

426

Center for Networked Information Discovery and Retrieval  

NSDL National Science Digital Library

The prototype AIDS patent library is a system designed by MCNC's Clearinghouse for Networked Information Discovery and Retrieval (CNIDR) for the U.S. Patent and Trademark Office (PTO) and will serve as a model for storing and disseminating government and other public documents in the future. The system uses CNIDR-developed information retrieval software and supports direct access to patents through a variety of popular network information services such as Z39.50, World Wide Web and electronic mail.

1994-01-01

427

Destination-directed, packet-switched architecture for a geostationary communications satellite network  

NASA Technical Reports Server (NTRS)

A major goal of the Digital Systems Technology Branch at the NASA Lewis Research Center is to identify and develop critical digital components and technologies that either enable new commercial missions or significantly enhance the performance, cost efficiency, and/or reliability of existing and planned space communications systems. NASA envisions a need for low-data-rate, interactive, direct-to-the-user communications services for data, voice, facsimile, and video conferencing. The network would provide enhanced very-small-aperture terminal (VSAT) communications services and be capable of handling data rates of 64 kbps through 2.048 Mbps in 64-kbps increments. Efforts have concentrated heavily on the space segment; however, the ground segment has been considered concurrently to ensure cost efficiency and realistic operational constraints. The focus of current space segment developments is a flexible, high-throughput, fault-tolerant onboard information-switching processor (ISP) for a geostationary satellite communications network. The Digital Systems Technology Branch is investigating both circuit and packet architectures for the ISP. Destination-directed, packet-switched architectures for geostationary communications satellites are addressed.

Ivancic, William D.; Shalkhauser, Mary JO; Bobinsky, Eric A.; Soni, Nitin J.; Quintana, Jorge A.; Kim, Heechul; Wager, Paul; Vanderaar, Mark

1993-01-01

428

The World Information Network on Biodiversity  

NSDL National Science Digital Library

The World Information Network on Biodiversity (REMIB) is organized and provided by Mexico's National Commission for the Knowledge and Use of the Biodiversity. REMIB is a network of shared biological information databases from research centers in Mexico, the US, Costa Rica, and Spain. The databases contain "curatorial, taxonomic, ecological, cartographic, bibliographic, ethno-biological type, use of catalogues on natural resources and other subject matters." Currently, REMIB gathers information on taxonomic groups of plants, as well as terrestrial and aquatic vertebrates, and invertebrates. The network contains information on over 6 million specimens from over 200 countries, and will be soon be incorporating collections from additional sources, such as the Smithsonian Institution and the Kew Herbarium. Users must first click on Access to the Information and accept the conditions for data use before reaching the network's search engine. The main page includes links to the home pages of partner institutions.

1969-12-31

429

78 FR 17418 - Rural Health Information Technology Network Development Grant  

Federal Register 2010, 2011, 2012, 2013

...Administration Rural Health Information Technology Network Development Grant AGENCY: Health Resources...the Rural Health Information Technology Network Development Grant (RHITND) to Grace...the Rural Health Information Technology Network Development (RHITND) Grant to the...

2013-03-21

430

Secure End-to-End Communication over GSM and PSTN Networks  

Microsoft Academic Search

GSM (Global System for Mobiles) is the most widely spread mobile communication system in the world. An important objective in mobile communication systems is secure speech communication. GSM suffers from various security weaknesses. The GSM voice traffic is secure outside the core network but it has no security over the core network. This system can be made thoroughly secure by

Saad Islam; Fatima Ajmal; Salman Ali; Jawad Zahid; Adnan Rashdi

2009-01-01

431

Communication Cost, Belief Development, and Structural Change: A Dynamic Model of Networked Communities of Practice  

E-print Network

. The choice of communication infrastructure affects the development of communities of practice. Face-to-faceCommunication Cost, Belief Development, and Structural Change: A Dynamic Model of Networked/10/00 Communication Cost, Belief Development, and Structural Change: A Dynamic Model of Networked Communities

Sadeh, Norman M.

432

Eavesdropping and communication networks revealed through playback and an acoustic location system  

Microsoft Academic Search

Our understanding of animal communication is expanding from a dyadic framework of one signaler and one receiver to a broader communication network model, yet empirical studies of communication networks are scarce. To investigate whether territorial males eavesdrop on interactions occurring outside of their territory boundaries and to quantify the neighborhood-level effects of song contests, we simulated diurnal dyadic countersinging exchanges

Lauren P. Fitzsimmons; Jennifer R. Foote; Laurene M. Ratcliffe; Daniel J. Mennill

2008-01-01

433

77 FR 8256 - Information Collection Being Reviewed by the Federal Communications Commission  

Federal Register 2010, 2011, 2012, 2013

...the Federal Communications Commission...created an Emergency Contact Information...and other emergency and defense...have effective communications services available...everyday and emergency communications needs,...

2012-02-14

434

76 FR 67451 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2011-11-01

435

78 FR 28215 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice;...

2013-05-14

436

76 FR 49476 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2011-08-10

437

78 FR 66929 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2013-11-07

438

78 FR 36185 - Information Collection(s) Being Reviewed by the Federal Communications Commission, Comments...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection(s) Being Reviewed by the Federal Communications Commission, Comments Requested AGENCY: Federal Communications Commission. ACTION: Notice;...

2013-06-17

439

76 FR 61699 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2011-10-05

440

78 FR 6102 - Information Collection(s) Being Reviewed by the Federal Communications Commission, Comments...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection(s) Being Reviewed by the Federal Communications Commission, Comments Requested AGENCY: Federal Communications Commission. ACTION: Notice;...

2013-01-29

441

78 FR 55254 - Information Collection Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2013-09-10

442

77 FR 55838 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2012-09-11

443

77 FR 66838 - Information Collection Being Reviewed by the Federal Communications Commission for Extension...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collection Being Reviewed by the Federal Communications Commission for Extension Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice;...

2012-11-07

444

78 FR 8528 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2013-02-06

445

78 FR 18338 - Information Collections Being Reviewed by the Federal Communications Commission, Comments Requested  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission, Comments Requested AGENCY: Federal Communications Commission. ACTION: Notice; request...

2013-03-26

446

78 FR 34097 - Information Collections Being Reviewed by the Federal Communications Commission Under Delegated...  

Federal Register 2010, 2011, 2012, 2013

...FEDERAL COMMUNICATIONS COMMISSION Information Collections Being Reviewed by the Federal Communications Commission Under Delegated Authority AGENCY: Federal Communications Commission. ACTION: Notice and...

2013-06-06

447

Mixed Integer Programming and Heuristic Scheduling for Space Communication Networks  

NASA Technical Reports Server (NTRS)

We developed framework and the mathematical formulation for optimizing communication network using mixed integer programming. The design yields a system that is much smaller, in search space size, when compared to the earlier approach. Our constrained network optimization takes into account the dynamics of link performance within the network along with mission and operation requirements. A unique penalty function is introduced to transform the mixed integer programming into the more manageable problem of searching in a continuous space. The constrained optimization problem was proposed to solve in two stages: first using the heuristic Particle Swarming Optimization algorithm to get a good initial starting point, and then feeding the result into the Sequential Quadratic Programming algorithm to achieve the final optimal schedule. We demonstrate the above planning and scheduling methodology with a scenario of 20 spacecraft and 3 ground stations of a Deep Space Network site. Our approach and framework have been simple and flexible so that problems with larger number of constraints and network can be easily adapted and solved.

Cheung, Kar-Ming; Lee, Charles H.

2012-01-01

448

Evolution of communication protocols using an artificial regulatory network.  

PubMed

Abstract I describe the Utrecht Machine (UM), a discrete artificial regulatory network designed for studying how evolution discovers biochemical computation mechanisms. The corresponding binary genome format is compatible with gene deletion, duplication, and recombination. In the simulation presented here, an agent consisting of two UMs, a sender and a receiver, must encode, transmit, and decode a binary word over time using the narrow communication channel between them. This communication problem has chicken-and-egg structure in that a sending mechanism is useless without a corresponding receiving mechanism. An in-depth case study reveals that a coincidence creates a minimal partial solution, from which a sequence of partial sending and receiving mechanisms evolve. Gene duplications contribute by enlarging the regulatory network. Analysis of 60,000 sample runs under a variety of parameter settings confirms that crossover accelerates evolution, that stronger selection tends to find clumsier solutions and finds them more slowly, and that there is implicit selection for robust mechanisms and genomes at the codon level. Typical solutions associate each input bit with an activation speed and combine them almost additively. The parents of breakthrough organisms sometimes have lower fitness scores than others in the population, indicating that populations can cross valleys in the fitness landscape via outlying members. The simulation exhibits back mutations and population-level memory effects not accounted for in traditional population genetics models. All together, these phenomena suggest that new evolutionary models are needed that incorporate regulatory network structure. PMID:25148549

Mitchener, W Garrett

2014-01-01

449

Information Security with Formal Immune Networks  

Microsoft Academic Search

We propose a biological approach to information security based on a rigorous mathematical notion of formal immune network.\\u000a According to our previous developments, such networks possess all the main capabilities of artificial intelligence system,\\u000a and could be considered as an alternative to the wide spread artificial neural networks or intelligent agents. We consider\\u000a also the main distinctions of our approach

Alexander O. Tarakanov

2001-01-01

450

The Teen Health Information Network (THINK).  

ERIC Educational Resources Information Center

Discusses the Teen Health Information Network (THINK), a grant-funded partnership of Aurora, Illinois, public libraries, schools, and community agencies to provide materials, information, and programming on issues related to teen health. Seven appendixes provide detailed information on survey results, collection evaluation and development,…

Kuzel, Judith; Erickson, Su

1995-01-01

451

Inferring Private Information Using Social Network Data  

E-print Network

Inferring Private Information Using Social Network Data Jack Lindamood and Murat Kantarcioglu that can guarantee the privacy of the individuals that consent to the release. · Private Information or hide their details in order to keep sensitive information private and still get the benefits of being

Kantarcioglu, Murat

452

Ohio Valley Community Health Information Network.  

ERIC Educational Resources Information Center

The Ohio Valley Community Health Information Network (OVCHIN) works to determine the efficacy of delivering health information to residents of rural southern Ohio and the urban and suburban Cincinnati area. OVCHIN is a community-based, consumer-defined demonstration grant program funded by the National Telecommunications and Information

Guard, Roger; And Others

453

Deep Space Network and Lunar Network Communication Coverage of the Moon  

NASA Technical Reports Server (NTRS)

In this article, we describe the communication coverage analysis for the lunar network and the Earth ground stations. The first part of this article focuses on the direct communication coverage of the Moon from the Earth's ground stations. In particular, we assess the coverage performance of the Moon based on the existing Deep Space Network (DSN) antennas and the complimentary coverage of other potential stations at Hartebeesthoek, South Africa and at Santiago, Chile. We also address the coverage sensitivity based on different DSN antenna scenarios and their capability to provide single and redundant coverage of the Moon. The second part of this article focuses on the framework of the constrained optimization scheme to seek a stable constellation six relay satellites in two planes that not only can provide continuous communication coverage to any users on the Moon surface, but can also deliver data throughput in a highly efficient manner.

Lee, Charles H.; Cheung, Kar-Ming

2006-01-01

454

Online Social Networking by Patients with Diabetes: A Qualitative Evaluation of Communication with Facebook  

Microsoft Academic Search

Background  Several disease-specific information exchanges now exist on Facebook and other online social networking sites. These new sources\\u000a of knowledge, support, and engagement have become important for patients living with chronic disease, yet the quality and\\u000a content of the information provided in these digital arenas are poorly understood.\\u000a \\u000a \\u000a \\u000a \\u000a Objective  To qualitatively evaluate the content of communication in Facebook communities dedicated to diabetes.

Jeremy A. Greene; Niteesh K. Choudhry; Elaine Kilabuk; William H. Shrank

2011-01-01

455

Visual Communications for Heterogeneous Networks/Visually Optimized Scalable Image Compression. Final Report for September 1, 1995 - February 28, 2002  

SciTech Connect

The authors developed image and video compression algorithms that provide scalability, reconstructibility, and network adaptivity, and developed compression and quantization strategies that are visually optimal at all bit rates. The goal of this research is to enable reliable ''universal access'' to visual communications over the National Information Infrastructure (NII). All users, regardless of their individual network connection bandwidths, qualities-of-service, or terminal capabilities, should have the ability to access still images, video clips, and multimedia information services, and to use interactive visual communications services. To do so requires special capabilities for image and video compression algorithms: scalability, reconstructibility, and network adaptivity. Scalability allows an information service to provide visual information at many rates, without requiring additional compression or storage after the stream has been compressed the first time. Reconstructibility allows reliable visual communications over an imperfect network. Network adaptivity permits real-time modification of compression parameters to adjust to changing network conditions. Furthermore, to optimize the efficiency of the compression algorithms, they should be visually optimal, where each bit expended reduces the visual distortion. Visual optimality is achieved through first extensive experimentation to quantify human sensitivity to supra-threshold compression artifacts and then incorporation of these experimental results into quantization strategies and compression algorithms.

Hemami, S. S.

2003-06-03

456

Evolutionary algorithms applied to reliable communication network design  

NASA Astrophysics Data System (ADS)

Several evolutionary algorithms (EAs) applied to a wide class of communication network design problems modelled under the generalized Steiner problem (GSP) are evaluated. In order to provide a fault-tolerant design, a solution to this problem consists of a preset number of independent paths linking each pair of potentially communicating terminal nodes. This usually requires considering intermediate non-terminal nodes (Steiner nodes), which are used to ensure path redundancy, while trying to minimize the overall cost. The GSP is an NP-hard problem for which few algorithms have been proposed. This article presents a comparative study of pure and hybrid EAs applied to the GSP, codified over MALLBA, a general purpose library for combinatorial optimization. The algorithms were tested on several GSPs, and asset efficient numerical results are reported for both serial and distributed models of the evaluated algorithms.

Nesmachnow, Sergio; Cancela, Hector; Alba, Enrique

2007-10-01

457

A Prototype Chemical Substances Information Network.  

National Technical Information Service (NTIS)

A concept for a prototype Chemical Substances Information Network (CSIN) is presented in this report, which covers usage, alternative system architectures, recommended capabilities, and system design. The proposed prototype will deliver significant utilit...

1979-01-01

458

MODERN AGRICULTURAL DIGITAL MANAGEMENT NETWORK INFORMATION  

E-print Network

MODERN AGRICULTURAL DIGITAL MANAGEMENT NETWORK INFORMATION SYSTEM OF HEILONGJIANG RECLAMATION AREA the First Reclamation Land University, Daqing, Heilongjiang Province, P. R. China 163319 * Corresponding author, Address: Engineering Collage, Heilongjiang August the First Reclamation Land University, Daqing

459

BOULDER AREA SUSTAINABILITY INFORMATION NETWORK (BASIN)  

EPA Science Inventory

The primary goal of the Boulder Area Sustainability Information Network (BASIN) is to help citizens make meaningful connections between environmental data and their day-to-day activities and facilitate involvement in public policy development. Objectives include: ...

460

Managing information security in a business network of machinery maintenance services business - Enterprise architecture as a coordination tool  

Microsoft Academic Search

Today, technologies enable easy access to information across organizational boundaries, also to systems of partners in business networks. This raises, however, several complex research questions on privacy, information security and trust. The study reported here provides motivation and a roadmap for approaching integrated security management solutions in a business network of partners with heterogeneous information and communication technologies (ICT): Systems,

Mirja Pulkkinen; Anton Naumenko; Kari Luostarinen

2007-01-01

461

Telemedicine in Australia. 2: The Health Communication Network.  

PubMed

The Health Communication Network (HCN) in Australia is reviewed. Early interest from both the government and the medical community led to the establishment of a number of pilot services. Because of the community interest in privacy issues, determined efforts to understand and build structures to cope with privacy have been made. The first HCN services began to be tested in 1995, and progressive expansion is planned. The HCN, while supported by the government, is a separate, commercial entity, and much early work has thus focused on corporate governance, so that it will be able to do what it was designed for. PMID:9375035

Alexander, M

1996-01-01

462

Cooperative Localization and Mapping in Sparsely-Communicating Robot Networks  

NASA Astrophysics Data System (ADS)

This thesis examines the use of multiple robots in cooperative simultaneous localization and mapping (SLAM), where each robot must estimate the poses of all robots in the team, along with the positions of all known landmarks. The robot team must operate under the condition that the communication network between robots is never guaranteed to be fully connected. Under this condition, a novel algorithm is derived that allows each robot to obtain the centralized-equivalent estimate in a decentralized manner, whenever possible. The algorithm is then extended to a decentralized and distributed approach where robots share the computational burden in considering different data association hypotheses in generating the centralized-equivalent consensus estimate.

Leung, Keith Yu Kit

463

The Deep Space Network: A Radio Communications Instrument for Deep Space Exploration  

NASA Technical Reports Server (NTRS)

The primary purpose of the Deep Space Network (DSN) is to serve as a communications instrument for deep space exploration, providing communications between the spacecraft and the ground facilities. The uplink communications channel provides instructions or commands to the spacecraft. The downlink communications channel provides command verification and spacecraft engineering and science instrument payload data.

Renzetti, N. A.; Stelzried, C. T.; Noreen, G. K.; Slobin, S. D.; Petty, S. M.; Trowbridge, D. L.; Donnelly, H.; Kinman, P. W.; Armstrong, J. W.; Burow, N. A.

1983-01-01

464

Including communication success in the estimation of information gain  

E-print Network

Including communication success in the estimation of information gain for multi-robot exploration a hypothetical disaster site with a small team of robots. The challenge faced by the robot team is to coordinate can only be optimal when the robots share the same map. With a limited communication range the map

Visser, Arnoud

465

Ethical dilemmas in communicating medical information to the public  

Microsoft Academic Search

This paper examines arguments for and against objective communication between health-care experts (HCEs) and the public concerning matters of health and disease. It argues that HCEs should have neither a purely objective approach nor a paternalistic approach to communications with the public. The informed consent model is the best way to promote public health, prevent disease, respect individual autonomy, and

David B. Resnik

2001-01-01

466

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. PMID:17121460

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

2006-01-01

467

Preliminary Measurement of Communication Rates on the Cray T3D Interprocessor Network  

NASA Technical Reports Server (NTRS)

None given.(from task description): Objectives: test the communication network, determine how communication rates scale with message size, test the effect of contention, show the effect of contention.

Springer, Paul; Peterson, John; Numrich, Robert

1993-01-01

468

Title: Digital Infrastructure: Reducing Energy Cost and Environmental Impacts of Information Processing and Communications Systems  

E-print Network

Title: Digital Infrastructure: Reducing Energy Cost and Environmental Impacts of Information Processing and Communications Systems Abstract: Creating a Sustainable Information and Communication Infrastructure Modern society's dependence on information and communication infrastructure (ICI) is so deeply

469

Propagation, cascades, and agreement dynamics in complex communication and social networks  

NASA Astrophysics Data System (ADS)

Many modern and important technological, social, information and infrastructure systems can be viewed as complex systems with a large number of interacting components. Models of complex networks and dynamical interactions, as well as their applications are of fundamental interests in many aspects. Here, several stylized models of multiplex propagation and opinion dynamics are investigated on complex and empirical social networks. We first investigate cascade dynamics in threshold-controlled (multiplex) propagation on random geometric networks. We find that such local dynamics can serve as an efficient, robust, and reliable prototypical activation protocol in sensor networks in responding to various alarm scenarios. We also consider the same dynamics on a modified network by adding a few long-range communication links, resulting in a small-world network. We find that such construction can further enhance and optimize the speed of the network's response, while keeping energy consumption at a manageable level. We also investigate a prototypical agent-based model, the Naming Game, on two-dimensional random geometric networks. The Naming Game [A. Baronchelli et al., J. Stat. Mech.: Theory Exp. (2006) P06014.] is a minimal model, employing local communications that captures the emergence of shared communication schemes (languages) in a population of autonomous semiotic agents. Implementing the Naming Games with local broadcasts on random geometric graphs, serves as a model for agreement dynamics in large-scale, autonomously operating wireless sensor networks. Further, it captures essential features of the scaling properties of the agreement process for spatially-embedded autonomous agents. Among the relevant observables capturing the temporal properties of the agreement process, we investigate the cluster-size distribution and the distribution of the agreement times, both exhibiting dynamic scaling. We also present results for the case when a small density of long-range communication links are added on top of the random geometric graph, resulting in a "small-world"-like network and yielding a significantly reduced time to reach global agreement. We construct a finite-size scaling analysis for the agreement times in this case. When applying the model of Naming Game on empirical social networks, this stylized agent-based model captures essential features of agreement dynamics in a network of autonomous agents, corresponding to the development of shared classification schemes in a network of artificial agents or opinion spreading and social dynamics in social networks. Our study focuses on the impact that communities in the underlying social graphs have on the outcome of the agreement process. We find that networks with strong community structure hinder the system from reaching global agreement; the evolution of the Naming Game in these networks maintains clusters of coexisting opinions indefinitely. Further, we investigate agent-based network strategies to facilitate convergence to global consensus.

Lu, Qiming

470

Place-Based Attributes Predict Community Membership in a Mobile Phone Communication Network  

PubMed Central

Social networks can be organized into communities of closely connected nodes, a property known as modularity. Because diseases, information, and behaviors spread faster within communities than between communities, understanding modularity has broad implications for public policy, epidemiology and the social sciences. Explanations for community formation in social networks often incorporate the attributes of individual people, such as gender, ethnicity or shared activities. High modularity is also a property of large-scale social networks, where each node represents a population of individuals at a location, such as call flow between mobile phone towers. However, whether or not place-based attributes, including land cover and economic activity, can predict community membership for network nodes in large-scale networks remains unknown. We describe the pattern of modularity in a mobile phone communication network in the Dominican Republic, and use a linear discriminant analysis (LDA) to determine whether geographic context can explain community membership. Our results demonstrate that place-based attributes, including sugar cane production, urbanization, distance to the nearest airport, and wealth, correctly predicted community membership for over 70% of mobile phone towers. We observed a strongly positive correlation (r?=?0.97) between the modularity score and the predictive ability of the LDA, suggesting that place-based attributes can accurately represent the processes driving modularity. In the absence of social network data, the methods we present can be used to predict community membership over large scales using solely place-based attributes. PMID:23451034

Caughlin, T. Trevor; Ruktanonchai, Nick; Acevedo, Miguel A.; Lopiano, Kenneth K.; Prosper, Olivia; Eagle, Nathan; Tatem, Andrew J.

2013-01-01

471

Growth and development of information and communication technologies in Bangladesh  

Microsoft Academic Search

Purpose – The purpose of this paper is to highlight the present status of information and communication technology (ICT) in Bangladesh and to represent the scenario of growth and development of ICT in relation to the evolution of the information explosion with the aim of providing better library and information services in Bangladesh. Design\\/methodology\\/approach – Documentary sources and direct observation

Anwarul Islam; Anisur Rahman

2006-01-01

472

Communicating genetic risk information within families: a review  

Microsoft Academic Search

This review of family communication of genetic risk information addresses questions of what the functions and influences on\\u000a communication are; what, who and how family members are told about genetic risk information; what the impact for counsellee,\\u000a relative and relationships are; whether there are differences by gender and condition; and what theories and methodologies\\u000a are used. A systematic search strategy

Mel Wiseman; Caroline Dancyger; Susan Michie

2010-01-01

473

Networks on the Edge of Forever: Examining the Feasibility of using Meteor Burst (MB) Communication Networks on Mars  

Microsoft Academic Search

The envisioned future may include continuous operating outposts and networks on other worlds supporting human and robotic exploration. Given this possibility, a feasibility analysis is performed of a communications architecture based upon reflection of ion trails from meteors in planetary atmospheres. Meteor Burst (MB) communication systems use meteoritic impacts on planetary atmospheres as two-way, short burst communication nodes. MB systems

A. Charania

2002-01-01

474

Brief Communications Efficiency of Functional Brain Networks and Intellectual Performance  

E-print Network

Our brain is a complex network in which information is continuously processed and transported between spatially distributed but functionally linked regions. Recent studies have shown that the functional connections of the brain network are organized in a highly efficient small-world manner, indicating a high level of local neighborhood clustering, together with the existence of more long-distance connectionsthatensureahighlevelofglobalcommunicationefficiencywithintheoverallnetwork.Suchanefficientnetworkarchitecture of our functional brain raises the question of a possible association between how efficiently the regions of our brain are functionally connected and our level of intelligence. Examining the overall organization of the brain network using graph analysis, we show a strong negative association between the normalized characteristic path length ? of the resting-state brain network and intelligence quotient (IQ). This suggests that human intellectual performance is likely to be related to how efficiently our brain integrates information between multiple brain regions. Most pronounced effects between normalized path length and IQ were found in frontal and parietal regions. Our findings indicate a strong positive association between the global efficiency of functional brain networks and intellectual performance.

Martijn P. Van Den Heuvel; Cornelis J. Stam; René S. Kahn; Hilleke E. Hulshoff Pol

475

A survey on intrabody communications for body area network applications.  

PubMed

The rapid increase in healthcare demand has seen novel developments in health monitoring technologies, such as the body area networks (BAN) paradigm. BAN technology envisions a network of continuously operating sensors, which measure critical physical and physiological parameters e.g., mobility, heart rate, and glucose levels. Wireless connectivity in BAN technology is key to its success as it grants portability and flexibility to the user. While radio frequency (RF) wireless technology has been successfully deployed in most BAN implementations, they consume a lot of battery power, are susceptible to electromagnetic interference and have security issues. Intrabody communication (IBC) is an alternative wireless communication technology which uses the human body as the signal propagation medium. IBC has characteristics that could naturally address the issues with RF for BAN technology. This survey examines the on-going research in this area and highlights IBC core fundamentals, current mathematical models of the human body, IBC transceiver designs, and the remaining research challenges to be addressed. IBC has exciting prospects for making BAN technologies more practical in the future. PMID:23542945

Seyedi, MirHojjat; Kibret, Behailu; Lai, Daniel T H; Faulkner, Michael

2013-08-01

476

Online Communication and Information Technology Education  

ERIC Educational Resources Information Center

Blended Learning, a learning facilitation that incorporates different modes of delivery, models of teaching, and learning styles, introduces multiple media to the dialog between the learner and the facilitator. This paper examines online communication as the link between established theory of learning and literature on e-learning in order to…

Heinze, Aleksej; Procter, Chris

2006-01-01

477

Direct Information Exchange in Wireless Networks: A Coding Perspective  

E-print Network

the problem and reduce the stress on the wireless networks. One strategy to reduce the strain on the wireless networks is to utilize cooperative communication. The purpose of this thesis is to provide more efficient and reliable solutions for direct...

Ozgul, Damla

2011-10-21

478

Identifying Information Spreaders in Twitter Follower Networks  

E-print Network

Identifying Information Spreaders in Twitter Follower Networks Xufei Wang, Huan Liu, Peng Zhang.wang, huan.liu, pzhang41, baoxin.li}@asu.edu ABSTRACT A number of research efforts on Twitter have been con between analyzing retweetbility and understanding information diffusion. Using a large scale Twitter data

Sukthankar, Gita Reese

479

Modeling Information Diffusion in Implicit Networks  

Microsoft Academic Search

Social media forms a central domain for the production and dissemination of real-time information. Even though such flows of information have traditionally been thought of as diffusion processes over social networks, the underlying phenomena are the result of a complex web of interactions among numerous participants. Here we develop the Linear Influence Model where rather than requiring the knowledge of

Jaewon Yang; Jure Leskovec

2010-01-01

480

Information Network Technology in Higher Education Teaching  

Microsoft Academic Search

With the popularization of computer technology in the period of rapid development of higher education, including artificial intelligence technology becomes more widely used. Based on the analysis of the status of education and information network technology application situation, by the theory of artificial intelligence and the study of hot issues, analysis of information technology in education and the necessity of

Xiaojin Xu

2011-01-01

481

Protecting Personal Information on Social Networking Sites  

ERIC Educational Resources Information Center

Almost everyone uses social networking sites like Facebook, MySpace, and LinkedIn. Since Facebook is the most popular site in the history of the Internet, this article will focus on how one can protect his/her personal information and how that extends to protecting the private information of others.

Gallant, David T.

2011-01-01

482