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1

Animal Communication  

NSDL National Science Digital Library

The focus of this Science NetLinks lesson is threefold. First, to expose students to the fact that all species have a capacity for communication. Second, to enlighten students to the fact that communication abilities range from very simple to extremely complex, depending upon the species. Third, to realize that communication is influenced by a species' genetic makeup, its environment, and the numerous ways by which animals and humans respond to and adapt to their surroundings.

Science Netlinks

2003-09-09

2

Development of a CG-animation system for sign language communication between different languages  

Microsoft Academic Search

We developed a system to display animation of sign language for communication between different languages using the lifo language where computer graphics (CG) animations are displayed corresponding to the words of sign language. The demonstration confirmed the validity of the developed system. Since one of the authors is now conducting research in Germany, we are investigating sign language communication using

Yoshinao Aoki; Shin Tanahasi; Alexander Burger; Hiroyuki Hattori; Hidemasa Wakoh

1997-01-01

3

Quantitative tools for comparing animal communication systems: information theory applied to bottlenose dolphin whistle repertoires  

Microsoft Academic Search

Comparative analysis of nonhuman animal communication systems and their complexity, particularly in comparison to human language, has been generally hampered by both a lack of sufficiently extensive data sets and appropriate analytic tools. Information theory measures provide an important quantitative tool for examining and comparing communication systems across species. In this paper we use the original application of information theory,

SEAN F. HANSER; LAURANCE R. DOYLE

1999-01-01

4

The Animal Communication Project  

NSDL National Science Digital Library

This streamlined website is very accessible to the lay reader, while it also has enough references to scientific studies to appeal to teachers, researchers, and students of animal communication and biology in general. The site contains the full-text of the (now out-of-print) book, The Language of Animals, in addition to "Research News" and some multimedia features. The type of animal communication this website refers to is not that between animals and humans, but among animals. Visitors with pet dogs or cats might enjoy the section on "Cats and Dogs" that explains how lions communicate, and why the domesticated dog barks, but other members of the dog family, such as wolves and coyotes, do not.

5

Information Theory Applied to Animal Communication Systems and Its Possible Application to SETI  

NASA Astrophysics Data System (ADS)

Information theory, as first introduced by Claude Shannon (Shannon &Weaver 1949) quantitatively evaluates the organizational complexity of communication systems. At the same time George Zipf was examining linguistic structure in a way that was mathematically similar to the components of the Shannon first-order entropy (Zipf 1949). Both Shannon's and Zipf's mathematical procedures have been applied to animal communication and recently have been providing insightful results. The Zipf plot is a useful tool for a first estimate of the characterization of a communication system's complexity (which can later be examined for complex structure at deeper levels using Shannon entropic analysis). In this paper we shall discuss some of the applications and pitfalls of using the Zipf distribution as a preliminary evaluator of the communication complexity of a signaling system.

Hanser, Sean F.; Doyle, Laurance R.; McCowan, Brenda; Jenkins, Jon M.

2004-06-01

6

Animal Communication: What Do Animals Say?  

ERIC Educational Resources Information Center

Discusses the nature of animal communication, including possible relationships between the physical structure of vocalizations and their functions in communicating. Provides tables of mammalian and avian sounds (by species/family) used in hostile and friendly appeasing contexts. (JN)

Morton, Eugene S.

1983-01-01

7

Animal Communications Through Seismic Vibrations  

SciTech Connect

Substrate vibration has been important to animals as a channel of communication for millions of years, but our literature on vibration in this context of biologically relevant information is only decades old. The jaw mechanism of the earliest land vertebrates allowed them to perceive substrate vibrations as their heads lay on the ground long before airborne sounds could be heard. Although the exact mechanism of vibration production and the precise nature of the wave produced are not always understood, recent development of affordable instrumentation to detect and measure vibrations has allowed researchers to answer increasingly sophisticated questions about how animals send and receive vibration signals. We now know that vibration provides information used in predator defense, prey detection, recruitment to food, mate choice, intrasexual competition, and maternal/brood social interactions in a variety of insect orders, spiders, crabs, scorpions, chameleons, frogs, golden moles, mole rats, kangaroos rats, wallabies, elephants and bison.

Hill, Peggy (University of Tulsa) [University of Tulsa

2001-05-02

8

All about Animal Behavior & Communication. Animal Life for Children. [Videotape].  

ERIC Educational Resources Information Center

Why do animals do what they do? What is the difference between instinct and learned behavior? How do animals communicate? These questions are answered as children examine animal behaviors that help them find food, protect themselves, and care for their young. This videotape correlates to the following National Science Education Standards for Life…

2000

9

Song type matching is an honest early threat signal in a hierarchical animal communication system.  

PubMed

Aggressive encounters between animals often involve significant amounts of signalling before or in lieu of physical fights. When, as is often the case, these apparent threat signals are neither inherently costly nor inherently indicative of fighting ability, we should ask whether they are in fact honest signals, i.e. do they predict that escalation is imminent? While signalling theories have indicated that such 'conventional' threat signals can honestly predict escalation, attempts to gather supporting empirical evidence have mostly failed. For example, recent studies in songbirds of song type matching (replying to an opponent's song with the same song type he has just sung) have failed to confirm that it predicts an eventual attack by the signaller. In the present study of song sparrows (Melospiza melodia), we tested the hypothesis that song type matching is an early threat signal in a hierarchical signalling system. We used an improved model-playback design that simulated an escalating intrusion onto the subject's territory: the simulated opponent first sang in hiding from the boundary before moving to the centre of the territory, where he revealed himself and continued to sing. We found that type matching beginning in the boundary phase and continuing into the escalation phase, or beginning immediately after the escalation, reliably predicted both subsequent escalated signalling (soft songs and wing waves) and subsequent attack on the model, supporting the hypothesis that type matching is a reliable early threat signal. PMID:23378665

Akçay, Ça?lar; Tom, Mari E; Campbell, S Elizabeth; Beecher, Michael D

2013-04-01

10

Meaning in animal and human communication.  

PubMed

What is meaning? While traditionally the domain of philosophy and linguistics, this question, and others related to it, is critical for cognitive and comparative approaches to communication. This short essay provides a concise and accessible description of how the term meaning can and should be used, how it relates to 'intentional communication', and what would constitute good evidence of meaning in animal communication, in the sense that is relevant for comparisons with human language. PMID:25647173

Scott-Phillips, Thomas C

2015-05-01

11

Bi-Directional Communication: Growth and Immunity in Domestic Animals  

Technology Transfer Automated Retrieval System (TEKTRAN)

Evidence continues to mount supporting the existence of bi-directional communication pathways between the animal’s growth axis and immune system. For more than three decades, researchers have sought, and identified, linkages between the somatotrophic axis and health in domestic livestock. Early inve...

12

The use of network analysis to study complex animal communication systems: a study on nightingale song.  

PubMed

The singing of song birds can form complex signal systems comprised of numerous subunits sung with distinct combinatorial properties that have been described as syntax-like. This complexity has inspired inquiries into similarities of bird song to human language; but the quantitative analysis and description of song sequences is a challenging task. In this study, we analysed song sequences of common nightingales (Luscinia megarhynchos) by means of a network analysis. We translated long nocturnal song sequences into networks of song types with song transitions as connectors. As network measures, we calculated shortest path length and transitivity and identified the 'small-world' character of nightingale song networks. Besides comparing network measures with conventional measures of song complexity, we also found a correlation between network measures and age of birds. Furthermore, we determined the numbers of in-coming and out-going edges of each song type, characterizing transition patterns. These transition patterns were shared across males for certain song types. Playbacks with different transition patterns provided first evidence that these patterns are responded to differently and thus play a role in singing interactions. We discuss potential functions of the network properties of song sequences in the framework of vocal leadership. Network approaches provide biologically meaningful parameters to describe the song structure of species with extremely large repertoires and complex rules of song retrieval. PMID:24807258

Weiss, Michael; Hultsch, Henrike; Adam, Iris; Scharff, Constance; Kipper, Silke

2014-06-22

13

Information theory, animal communication, and the search for extraterrestrial intelligence  

Microsoft Academic Search

We present ongoing research in the application of information theory to animal communication systems with the goal of developing additional detectors and estimators for possible extraterrestrial intelligent signals. Regardless of the species, for intelligence (i.e., complex knowledge) to be transmitted certain rules of information theory must still be obeyed. We demonstrate some preliminary results of applying information theory to socially

Laurance R. Doyle; Brenda McCowan; Simon Johnston; Sean F. Hanser

2011-01-01

14

Video animation system  

SciTech Connect

A video animation system is being used at Sandia Laboratories in Albuquerque to record computer generated images directly onto 3/4'' videocassettes. The system serves as a quick turn around process for previewing sequences prior to sending them to a Dicomed film recorder. It is also used when videocassette is appropriate for final output. The video animation system in place at Sandia is described. The system consists of a medium resolution graphics display system, a 3/4'' professional quality videocassette recorder, and a controller that allows single frame recording of computer generated images to be performed under program control. Examples of output produced using this system are presented which will include animated sequences of scientific data produced by DISSPLA programs.

Mareda, J.

1985-01-01

15

Communication Systems Chair of Communication Systems  

E-print Network

of GSM overview ­ GSM interfaces ­ GSM network components Mobile switching center,visitor location;3 | 36 Communication Systems GSM interfaces and components #12;4 | 36 Communication Systems GSM (HLR) #12;5 | 36 Communication Systems GSM interfaces and components The several MSC

Schindelhauer, Christian

16

Communication across the curriculum in animal science.  

PubMed

The growing movement toward the integration of communications in science-based courses has been taken to the heart of the curriculum at Berea College. New college-wide general education requirements initiated a review of student abilities, departmental expectations, and the use of writing and speaking skills in all courses. Agriculture graduates require highly developed reading and speaking skills as well as fundamental control of language to succeed in industry today. Depending only on the English department to teach students writing and speaking skills can lead to graduates ill-prepared for communication in their chosen profession. The inclusion of communication skills in an animal science course not only improves such skills, but it also increases the ability of students to apply and use animal science concepts. The benefits of broadening the teaching curriculum to include reading, writing, speaking, and listening skills can provide improved academic achievement, attitude, confidence levels, and self-images. Students can become active participants rather than note-takers. Curriculum changes of such magnitude require faculty development opportunities and administrative support. PMID:8923197

Orr, C L

1996-11-01

17

Information theory, animal communication, and the search for extraterrestrial intelligence  

NASA Astrophysics Data System (ADS)

We present ongoing research in the application of information theory to animal communication systems with the goal of developing additional detectors and estimators for possible extraterrestrial intelligent signals. Regardless of the species, for intelligence (i.e., complex knowledge) to be transmitted certain rules of information theory must still be obeyed. We demonstrate some preliminary results of applying information theory to socially complex marine mammal species (bottlenose dolphins and humpback whales) as well as arboreal squirrel monkeys, because they almost exclusively rely on vocal signals for their communications, producing signals which can be readily characterized by signal analysis. Metrics such as Zipf's Law and higher-order information-entropic structure are emerging as indicators of the communicative complexity characteristic of an "intelligent message" content within these animals' signals, perhaps not surprising given these species' social complexity. In addition to human languages, for comparison we also apply these metrics to pulsar signals—perhaps (arguably) the most "organized" of stellar systems—as an example of astrophysical systems that would have to be distinguished from an extraterrestrial intelligence message by such information theoretic filters. We also look at a message transmitted from Earth (Arecibo Observatory) that contains a lot of meaning but little information in the mathematical sense we define it here. We conclude that the study of non-human communication systems on our own planet can make a valuable contribution to the detection of extraterrestrial intelligence by providing quantitative general measures of communicative complexity. Studying the complex communication systems of other intelligent species on our own planet may also be one of the best ways to deprovincialize our thinking about extraterrestrial communication systems in general.

Doyle, Laurance R.; McCowan, Brenda; Johnston, Simon; Hanser, Sean F.

2011-02-01

18

Communicating Emotions in Online Chat Using Physiological Sensors and Animated Text  

E-print Network

use of animated text occurred in films and TV advertising. They used animated text becauseCommunicating Emotions in Online Chat Using Physiological Sensors and Animated Text Hua Wang We present a chat system that uses animated text associated with emotional information to show

Igarashi, Takeo

19

The Communicative Functions of Animation in User Interfaces  

E-print Network

The Communicative Functions of Animation in User Interfaces David Novick The University of Texas@gmail.com ABSTRACT To develop a model that relates the purpose of the communication to the nature of the animation, we surveyed existing user interfaces that use animation, analyzed these uses with respect to type

Novick, David G.

20

Automated interactive video playback for studies of animal communication.  

PubMed

Video playback is a widely-used technique for the controlled manipulation and presentation of visual signals in animal communication. In particular, parameter-based computer animation offers the opportunity to independently manipulate any number of behavioral, morphological, or spectral characteristics in the context of realistic, moving images of animals on screen. A major limitation of conventional playback, however, is that the visual stimulus lacks the ability to interact with the live animal. Borrowing from video-game technology, we have created an automated, interactive system for video playback that controls animations in response to real-time signals from a video tracking system. We demonstrated this method by conducting mate-choice trials on female swordtail fish, Xiphophorus birchmanni. Females were given a simultaneous choice between a courting male conspecific and a courting male heterospecific (X. malinche) on opposite sides of an aquarium. The virtual male stimulus was programmed to track the horizontal position of the female, as courting males do in the wild. Mate-choice trials on wild-caught X. birchmanni females were used to validate the prototype's ability to effectively generate a realistic visual stimulus. PMID:21339726

Butkowski, Trisha; Yan, Wei; Gray, Aaron M; Cui, Rongfeng; Verzijden, Machteld N; Rosenthal, Gil G

2011-01-01

21

Secure video communications system  

DOEpatents

A secure video communications system having at least one command network formed by a combination of subsystems. The combination of subsystems to include a video subsystem, an audio subsystem, a communications subsystem, and a control subsystem. The video communications system to be window driven and mouse operated, and having the ability to allow for secure point-to-point real-time teleconferencing.

Smith, Robert L. (Idaho Falls, ID)

1991-01-01

22

Communication System and Method  

NASA Technical Reports Server (NTRS)

A communication system for communicating over high-latency, low bandwidth networks includes a communications processor configured to receive a collection of data from a local system, and a transceiver in communication with the communications processor. The transceiver is configured to transmit and receive data over a network according to a plurality of communication parameters. The communications processor is configured to divide the collection of data into a plurality of data streams; assign a priority level to each of the respective data streams, where the priority level reflects the criticality of the respective data stream; and modify a communication parameter of at least one of the plurality of data streams according to the priority of the at least one data stream.

Sanders, Adam M. (Inventor); Strawser, Philip A. (Inventor)

2014-01-01

23

Alert signals enhance animal communication in “noisy” environments  

PubMed Central

Environmental noise that reduces the probability that animals will detect communicative signals poses a special challenge for long-range communication. The application of signal-detection theory to animal communication lead to the prediction that signals directed at distant receivers in noisy environments will begin with conspicuous “alerting” components to attract the attention of receivers, before delivery of the information-rich portion of the signal. Whether animals actually adopt this strategy is not clear, despite suggestions that alerts might exist in a variety of taxa. By using a combination of behavioral observations and experimental manipulations with robotic lizard “playbacks,” we show that free-living territorial Anolis lizards add an “alert” to visual displays when communicating to distant receivers in situations of poor visibility, and that these introductory alerts in turn enhance signal detection in adverse signaling conditions. Our results show that Anolis lizards are able to evaluate environmental conditions that affect the degradation of long-distance signals and adjust their behavior accordingly. This study demonstrates that free-living animals enhance the efficiency of long-range communication through the modulation of signal design and the facultative addition of an alert. Our findings confirm that alert signals are an important strategy for communicating in “noisy” conditions and suggest a reexamination of the existence of alerts in other animals relying on long-range communication. PMID:19033197

Ord, Terry J.; Stamps, Judy A.

2008-01-01

24

Child's Modes of Communication with the Animal.  

ERIC Educational Resources Information Center

The paper reviews ways in which animals have been used in a therapeutic way with disturbed persons and suggests that animals may help to reduce anxiety and reestablish the socialization process with autistic children and their parents. An etiological study is described of the verbal and nonverbal behavior of four disturbed children (9-11 years…

Salomon, Anne; Comeau, Judith

25

A Facial Sketch Animation Generator for Mobile Communication  

Microsoft Academic Search

The ability to analyze and reproduce specific-person facial expression is an important multimedia content service for mobile communication. In this paper, a novel three-layer facial animation model is presented for generating the personalized facial sketch animation, and the three layers are motion sequence layer, the reference shape layer, and the painting shape layer. Based on the model, a facial sketch

Yuehu Liu; Yuanqi Su; Yang Yang; Fengjuan Wang; Maojun Yuan; Zhen Ren

2007-01-01

26

Binary and Communication Systems  

NSDL National Science Digital Library

Students are introduced to the concept of binary coding as a language and its practical applications in digital and communication systems.This project gives students a deeper appreciation for communication systems and an understanding of how binary symbols are used to transmit information.

2012-06-21

27

Communication system modeling  

NASA Technical Reports Server (NTRS)

This report presents the results of work on communications systems modeling and covers three different areas of modeling. The first of these deals with the modeling of signals in communication systems in the frequency domain and the calculation of spectra for various modulations. These techniques are applied in determining the frequency spectra produced by a unified carrier system, the down-link portion of the Command and Communications System (CCS). The second modeling area covers the modeling of portions of a communication system on a block basis. A detailed analysis and modeling effort based on control theory is presented along with its application to modeling of the automatic frequency control system of an FM transmitter. A third topic discussed is a method for approximate modeling of stiff systems using state variable techniques.

Holland, L. D.; Walsh, J. R., Jr.; Wetherington, R. D.

1971-01-01

28

Animal Communication and Its Cognitive Indications.  

ERIC Educational Resources Information Center

Various examples of communication in species ranging from bumble bees to dolphins are examined in this paper. Focus is directed to indications of the cognitive ability of each species. The signals of cognition include evidence of: adaptability to a new situation; long term memory; and the property of displacement. Most of the sources reviewed…

McLean, Laura L.

29

Improving Communications Systems  

NASA Technical Reports Server (NTRS)

The Space Shuttle has many communications systems which are used throughout a typical mission. Given that the radio spectrum has become increasingly congested, the ability to hear extremely weak signals requires greater receiver sensitivity. Dryden Flight Research Center approached Angle Linear, a manufacturer of linear radio frequency products and peripherals for communications, to solve the problem. The solution was a receiving preamplifier specially crafted for NASA. Communications with the Space Shuttle are now more reliable,with Dryden being able to also support local missions without purchasing additional equipment. The work has carried over into the Mir Space Station communication support effort and is under evaluation by other NASA centers. The company's preamplifier line was greatly expanded to cover a broader range of frequencies, providing the same sensational improvement to other areas of communication including business, government, trucking, land mobile, cellular and broadcast.

1997-01-01

30

Behaviour Computer Animation, Communicability and Education for All  

Microsoft Academic Search

\\u000a We are making a heuristic study to determine the benefits of computer animation to improve communicability in the educational\\u000a processes. A diachronic analysis allows to research the influence of the design of the first animations of the 20th century\\u000a on the current 2D and\\/or 3D characters. We are also examining the existing link between the artistic and technical context\\u000a at

Francisco V. Cipolla Ficarra; Jacqueline Alma; Miguel Cipolla-Ficarra

31

The risk communication challenges of mass animal destruction.  

PubMed

Mass animal destruction strategies present a major risk communication challenge. While mass culling, stamping out, and depopulation may be scientifically and economically justified during emergency response to exotic disease incursions and eradication programmes, their use may be limited in the future due to public concerns over animal welfare, environmental contamination and unintended social consequences. To address this dilemma, official veterinary services must move from unidirectional communications strategies to active engagement of all potentially affected stakeholders. Case studies of recent disease outbreaks demonstrate the critical role that communications play in influencing public reaction to disease management strategies. An evaluation of these case studies provides support for the implementation of risk communication best practices: incorporating risk communications into the policy-development process, conducting pre-event planning, fostering partnerships with the public, collaborating with credible sources, meeting the needs of the media, listening to and addressing public concerns, communicating with compassion and empathy, demonstrating honesty and openness, acknowledging uncertainty and providing messages that give people meaningful things to do. Implementing the risk communication best practices requires veterinary services to move from a more technocratic approach to a participatory model where the potentially affected public play an active role in risk assessment and policy making. PMID:20411519

Hueston, William D

2007-01-01

32

Alert signals enhance animal communication in "noisy" environments  

E-print Network

Alert signals enhance animal communication in "noisy" environments Terry J. Orda,b,1 and Judy A with conspicuous "alerting" components to attract the attention of receivers, before delivery of the information that alerts might exist in a variety of taxa. By using a combination of behavioral observations

Ord, Terry

33

Video animation system operators manual  

SciTech Connect

This document describes the components necessary to put together a video animation system. It is primarily intended for use at Sandia National Laboratories as it describes the components used in systems at Sandia. The main document covers the operation of the equipment in some detail and is intended for either the system maintainer or an advanced user. There is an appendix for each of the three systems in use by the Engineering Sciences Directorate which contain instructions for the general user.

Mareda, J.F.

1992-09-01

34

Airborne wireless communication systems, airborne communication methods, and communication methods  

DOEpatents

An airborne wireless communication system includes circuitry configured to access information describing a configuration of a terrestrial wireless communication base station that has become disabled. The terrestrial base station is configured to implement wireless communication between wireless devices located within a geographical area and a network when the terrestrial base station is not disabled. The circuitry is further configured, based on the information, to configure the airborne station to have the configuration of the terrestrial base station. An airborne communication method includes answering a 911 call from a terrestrial cellular wireless phone using an airborne wireless communication system.

Deaton, Juan D. (Menan, ID); Schmitt, Michael J. (Idaho Falls, ID); Jones, Warren F. (Idaho Falls, ID)

2011-12-13

35

Neural communication systems Pter Andrs  

E-print Network

Neural communication systems Péter András School of Computing Science University of Newcastle communication systems. Such systems use pattern languages formulated as probabilistic continuation rules that determine which communications follow other communications. We apply this framework to define neural

Andras, Peter

36

A system for algorithm animation  

Microsoft Academic Search

A software environment is described which provides facilities at a variety of levels for “animating” algorithms: exposing properties of programs by displaying multiple dynamic views of the program and associated data structures. The system is operational on a network of graphics-based, personal workstations and has been used successfully in several applications for teaching and research in computer science and mathematics.

Marc H. Brown; Robert Seclgewick

1984-01-01

37

Environmental influences on acoustic and electric animal communication.  

PubMed

Animal communication in any sensory modality is influenced by environmental constraints on signal transmission and detection. Acoustic signals are subject to frequency-dependent attenuation, temporal degradation, and masking by environmental noise; these factors constrain the spectral and temporal structures of long-range sound signals. Signals produced by electric fish are largely free of such physical environmental constraints on their spectral and temporal structures, but experience severe attenuation due to geometrical spreading. This effectively limits electric communication to short ranges, whereas acoustic signals are more flexible in the range over which they are effective. PMID:3567539

Brenowitz, E A

1986-01-01

38

Communication Systems last lecture  

E-print Network

, power control and hand-over ­ Authentication and security #12;3 | 70 Communication Systems GSM of main GSM components ­ Authentication, Authorization, Access - Security issues will be handled ­ Authentication, Authorization, Access · In a public network like GSM the triple-A of authentication

Schindelhauer, Christian

39

Communication Systems. Laboratory Activities.  

ERIC Educational Resources Information Center

This communication systems guide provides teachers with learning activities for secondary students. Introductory materials include an instructional planning outline and worksheet, an outline of essential elements, a list of objectives, a course description, and a content outline. The guide contains 32 modules on the following topics: story…

Sutherland, Barbara, Ed.

40

SHORT COMMUNICATION Open Access Testing the VEMCO Positioning System: spatial  

E-print Network

SHORT COMMUNICATION Open Access Testing the VEMCO Positioning System: spatial distribution animals over long periods of time with regular fine-scale positions. The VEMCO Positioning System (VPS Positioning System, Probability of location, Positioning error, Spatial distribution Findings Background

41

Facial Sketch Rendering and Animation for Fun Communications  

Microsoft Academic Search

The ability to analyze a human’s facial expressions and reproduce them is important for fun communication. In this paper,\\u000a a novel model is presented for generating the facial sketch of pen-and-ink style and reproducing facial expressions in facial\\u000a sketch animation. Facial sketch rendering is implemented by combing the painting path and line template, in which personalized\\u000a painting path ensures the

Yuanqi Su; Yuehu Liu; Yunfeng Zhu; Zhen Ren

2006-01-01

42

Animal models of systemic vasculitis.  

PubMed

Necrotizing leucocytoclastic vasculitis is the histopathological hallmark of the small vessel systemic vasculitides (SV), a group of human diseases commonly associated with anti-neutrophil cytoplasm autoantibodies (ANCA). Necrotizing vasculitis is seen in a number of experimental systems, but none of these provide an ideal animal model for human SV. Vasculitis occurs in serum sickness reactions; in murine models of systemic lupus erythematosus; in association with infection, particularly chronic viral infections; and after treatment with certain drugs or inflammatory mediators. 'Spontaneous' vasculitis has been reported in specific mouse strains, especially with ageing, and in some larger species. The size of vessel involved and the type of inflammatory cells predominating are variable in these experimental situations, and none of these models feature antibodies analogous to ANCA. We have recently reported that Brown Norway rats treated with mercuric chloride (HgCl2) develop necrotizing leucocytoclastic vasculitis, especially in the gut, and also develop antibodies to myeloperoxidase (MPO) which recognize similar determinants on MPO to those bound by a subset of ANCA. Transfer of serum from HgCl2-treated rats to naive animals does not induce tissue injury. Preliminary experiments using pooled immunoglobulin or an anti-CD4 monoclonal antibody did not show useful therapeutic benefit from these treatments. HgCl2-induced vasculitis has weaknesses as an animal model of human SV, but is the only experimental model in which anti-MPO autoantibodies have so far been demonstrated, and therefore may be of particular relevance to ANCA-associated SV. PMID:8388693

Mathieson, P W; Qasim, F J; Esnault, V L; Oliveira, D B

1993-04-01

43

Insat communication system  

NASA Astrophysics Data System (ADS)

The Insat-1 domestic satellite system has been planned as a cost-effective multipurpose system for providing long distance telecommunications, direct TV broadcasting, to rural areas, and meteorological services, and is due to be operational in early 1982. The system will consist of two body-stabilized satellites in geostationary orbit and 34 earth stations, operating in the 6/4 GHz band for telecommunications. This paper describes the salient features of the Insat system. The domestic telecommunication requirements are presented, and the main characteristics of the spacecraft communication subsystem and earth stations are given. The transmission parameters of the Insat carriers are discussed, and the features of network operation and the control center are examined.

Nayak, U. V.; Matapurkar, K. G.

44

Digital and analog communication systems  

NASA Technical Reports Server (NTRS)

The book presents an introductory treatment of digital and analog communication systems with emphasis on digital systems. Attention is given to the following topics: systems and signal analysis, random signal theory, information and channel capacity, baseband data transmission, analog signal transmission, noise in analog communication systems, digital carrier modulation schemes, error control coding, and the digital transmission of analog signals.

Shanmugam, K. S.

1979-01-01

45

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.

46

Communication using Synchronized Chaotic Systems  

E-print Network

Communication using Synchronized Chaotic Systems Rachel Kramer Adam Cohen Bhargava Ravoori Thomas E attention for uses in secure CommunicationIntroduction Adaptive Synchronization The phenomenon sequence is transmitted over a time-varying communication channel. We examine cases with and without

Anlage, Steven

47

Crises Communication Systems at UCAR  

E-print Network

Crises Communication Systems at UCAR Presented to the UCAR Board of Trustees- Audit and Finance Committee By Stephen Sadler, UCAR Director Safety and Site Services #12;Types of Crises Communication or Program Emergency · Natural Event · Political #12;Communication Issues During A Crises · May occur during

48

Sign language communication between Japanese-Korean and Japanese-Portuguese using CG animation  

Microsoft Academic Search

We propose a sign language communication between different languages such as Japanese-Korean and Japanese-Portuguese using computer graphics (CG) animation of sign language based on the intelligent image communication method. For this purpose sign language animation is produced using gesture or text data expressing sign language. In the production process of CG animation of sign language, MATLAB and LIFO language are

Yoshinao Aoki; Ricardo Mitsumori; Jincan Li; Alexander Burger

1998-01-01

49

Security for Industrial Communication Systems  

Microsoft Academic Search

Modern industrial communication networks are increasingly based on open protocols and platforms that are also used in the office IT and Internet environment. This reuse facilitates development and deployment of highly connected systems, but also makes the communication system vulnerable to electronic attacks. This paper gives an overview of IT security issues in industrial automation systems which are based on

DACFEY DZUNG; MARTIN NAEDELE; THOMAS P. VON HOFF; MARIO CREVATIN

2005-01-01

50

General data base driven graphic animation system  

SciTech Connect

Most attempts at the graphic animation of data involve rather large and expensive development of problem-specific systems. This paper discusses a general graphics animation system designed to be a tool for the development of a wide variety of animated simulations. By incorporating device-independent graphics procedures and using relational database storage of graphics and control information, considerable flexibility in the design and development of animated displays is achieved. 6 refs., 4 figs.

Not Available

1986-01-01

51

ToonFace: A System for Creating and Animating Interactive Cartoon Faces  

Microsoft Academic Search

The majority of facial animation work has focused on realistic rendering, often with complex underlying models of muscles and sometimes of facial tissue. A system for facial animation is described that takes a simpler, more artistic aproach. A face animated in this system is an effective vehicle for emotional and communicative expression. The scheme emplyed divides the face into seven

52

Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture  

DOEpatents

Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture are described. In one aspect, a communications device identification method includes providing identification information regarding a group of wireless identification devices within a wireless communications range of a reader, using the provided identification information, selecting one of a plurality of different search procedures for identifying unidentified ones of the wireless identification devices within the wireless communications range, and identifying at least some of the unidentified ones of the wireless identification devices using the selected one of the search procedures.

Steele, Kerry D [Kennewick, WA; Anderson, Gordon A [Benton City, WA; Gilbert, Ronald W [Morgan Hill, CA

2011-02-01

53

Communications systems checkout study  

NASA Technical Reports Server (NTRS)

The results and conclusions of an engineering study of Space Station communications subsystem checkout are reported. The primary purpose of the study is to recommend specific guidelines and constraints for the design and utilization of the communications subsystem leading to a practical and effective means of onboard checkout implementation. Major study objectives are as follows: (1) identify candidate communications subsystem checkout concepts, (2) determine implementation impacts of feasible concepts, (3) evaluate practicality and effectiveness of alternative concepts, (4) propose baseline modifications to accommodate preferred concepts, and (5) recommend areas for additional investigation. In addition, study results are interpreted, where appropriate, in terms of their applicability to checkout of Shuttle-Orbiter communications subsystem.

Ginter, W. G.

1972-01-01

54

Satellite personal communications system  

NASA Technical Reports Server (NTRS)

Voice channel communication between low power mobile stations dispersed over a large area is provided by a system which includes a geostationary satellite utilizing a large UHF antenna that can receive a transmission from a caller and retransmit it over any one beam of a matrix of narrow beams, so the chosen beam covers an area in which a designated called party is located. A single up-link control channel occupying a narrow frequency band, can be utilized to receive dial up signals from a caller, and another single down link control channel can be utilized to ring up the called party located anywhere within the continental United States. The satellite antenna includes a matrix of feed horns that not only direct the beams in a controlled matrix onto the area of the continental United States, but also permit detection of the region from which the caller's signal is transmitted and the region from which the called party's answer is received, to enable the interconnection of signals received from these two regions. The system is particularly useful for rural areas.

Reilly, N. B.; Smith, J. G. (inventors)

1980-01-01

55

Constraint-based animation: temporal constraints in the Animus systems  

SciTech Connect

Algorithm animation has a growing role in computer-aided algorithm design documentation and debugging, since interactive graphics is a richer channel than text for communication. Most animation is currently done laboriously by hand, and it often has the character of canned demonstrations with restricted user interaction. Animus is a system that allows easy construction of an animation with minimal concern for lower-level graphics programming. Constraints are used to describe the appearance and structure of a picture as well as how those pictures evolve in time. The implementation and support of temporal constraints is a substantive extension to previous constraint languages which had only allowed specification of static state. Use of the Animus system is demonstrated in the creation of animations of dynamic mechanical and electrical-circuit simulations, sorting algorithms, problems in operating systems, and geometric curve-drawing algorithms.

Duisberg, R.A.

1986-01-01

56

Communication Systems Chair of Communication Systems  

E-print Network

from last lecture? What is the difference in fragmentation in IPv4 and IPv6? ­ Why a new system of fragmentation was introduced? ­ What is the minimum MTU in IPv6 networks? Which header fields were removed compared to IPv4? ­ What was changed for QoS handling? ­ How does the protocol stack knows which header

Schindelhauer, Christian

57

Communication Systems Chair of Communication Systems  

E-print Network

problems We talked of "how switches secure Ethernets" in the beginning ­ Promiscuous mode of the hosts and switch? Does a switch increase network security? Why (not)? Why don't we get perfect load equalization Internet) and an arbitrary end system in a switched Ethernet is not visible to third party ­ But what to do

Schindelhauer, Christian

58

Ultramicrowave communications system, phase 3  

NASA Technical Reports Server (NTRS)

The ultramicrowave communications system program investigated the feasibility of a solid state system that meets the projected space to space requirements, while using the advantages of the 100 to 200 GHz band. The program successfully demonstrated a laboratory model of a high frequency communications system operating between 100 to 200 GHz. In the process, vendor claims for performance specifications of discrete components were evaluated, and a window was provided into system design and integration problems.

1981-01-01

59

33 CFR 127.111 - Communications systems.  

Code of Federal Regulations, 2011 CFR

...Waterfront Facilities Handling Liquefied Natural Gas § 127.111 Communications systems. (a) The marine transfer area for LNG must have a ship-to-shore communication system and a separate emergency ship-to-shore communication system....

2011-07-01

60

33 CFR 127.111 - Communications systems.  

Code of Federal Regulations, 2012 CFR

...Waterfront Facilities Handling Liquefied Natural Gas § 127.111 Communications systems. (a) The marine transfer area for LNG must have a ship-to-shore communication system and a separate emergency ship-to-shore communication system....

2012-07-01

61

33 CFR 127.111 - Communications systems.  

Code of Federal Regulations, 2014 CFR

...Waterfront Facilities Handling Liquefied Natural Gas § 127.111 Communications systems. (a) The marine transfer area for LNG must have a ship-to-shore communication system and a separate emergency ship-to-shore communication system....

2014-07-01

62

Communication, Work Systems and HRD  

ERIC Educational Resources Information Center

Purpose: The purpose of this article is to show the foundational place that communication theory and its practice occupies in functioning work systems. Design/methodology/approach: This paper defines the word communication in terms of the creation and interpretation of displays, describes what it means to have a theoretical foundation for a…

Pace, R. Wayne

2013-01-01

63

Implementation of VRML\\/Java Web-based Animation and Communications for the Next Generation Inspection System (NGIS) Real-time Controller  

Microsoft Academic Search

The Next Generation Inspection System (NGIS) project is a testbed that consists of a Cordax Coordinate Measuring Machine (CMM), advanced sensors, and the National Institute of Standards and Technology (NIST) Real-Time Control System (RCS) open architecture controller. The RCS controller permits real-time processing of sensor data for feedback control of the inspection probe. The open architecture controller permits external access

William Shackleford; Keith Stouffer

64

Designing complementary communication systems  

E-print Network

We have long assumed that being face to face is the best environment for social interaction. But is "being there" the best we can aspire to? One common approach to improving face-to-face contexts is to add new communication ...

Harry, Drew

2012-01-01

65

Research Summary Assessing and communicating animal disease risks for countryside users  

E-print Network

Research Summary Assessing and communicating animal disease risks for countryside users Many, including the possibility of acquiring a disease from wild animals (known as a zoonotic disease, or zoonosis). Little is known about how best to warn users about animal-related diseases and encourage appropriate

66

The Jeliot 2000 program animation system  

Microsoft Academic Search

Jeliot 2000 is a program animation system intended for teaching introductory computer science to high school students.A program animation system is a system that displays a dynamic graphical representation of the execution of a program.The goal is to help novices understand basic concepts of algorithms and programming like assignment, I\\/O and control flow, whose dynamic aspects are not easily grasped

Ronit Ben-Bassat Levy; Mordechai Ben-Aria; Pekka A. Uronen

67

Patient Communication: A Multidisciplinary Approach Using Animated Cartoons  

ERIC Educational Resources Information Center

Communication is a major problem in the management of patients. Miscommunication occurs frequently in populations with low reading skills, illiteracy does not completely account for the observed low rates of recall of communicated information. Transmission of the message also plays an important role. Successful strategies to improve communication

Leiner, Marie; Handal, Gilbert; Williams, Darryl

2004-01-01

68

Patient communication: a multidisciplinary approach using animated cartoons  

Microsoft Academic Search

Communication is a major problem in the man- agement of patients. Miscommunication occurs frequentlyinpopulationswithlowreadingskills, illiteracy does not completely account for the observed low rates of recall of communicated information. Transmission of the message also plays an important role. Successful strategies to improve communication with patients include the use of videotapes, videotape modeling or cartoon illustrations. Do these products commu- nicate

Marie Leiner; Gilbert Handal; Darryl Williams

2004-01-01

69

A Model of Internal Communication in Adaptive Communication Systems.  

ERIC Educational Resources Information Center

A study identified and categorized different types of internal communication systems and developed an applied model of internal communication in adaptive organizational systems. Twenty-one large organizations were selected for their varied missions and diverse approaches to managing internal communication. Individual face-to-face or telephone…

Williams, M. Lee

70

Core systems of geometry in animal minds  

PubMed Central

Research on humans from birth to maturity converges with research on diverse animals to reveal foundational cognitive systems in human and animal minds. The present article focuses on two such systems of geometry. One system represents places in the navigable environment by recording the distance and direction of the navigator from surrounding, extended surfaces. The other system represents objects by detecting the shapes of small-scale forms. These two systems show common signatures across animals, suggesting that they evolved in distant ancestral species. As children master symbolic systems such as maps and language, they come productively to combine representations from the two core systems of geometry in uniquely human ways; these combinations may give rise to abstract geometric intuitions. Studies of the ontogenetic and phylogenetic sources of abstract geometry therefore are illuminating of both human and animal cognition. Research on animals brings simpler model systems and richer empirical methods to bear on the analysis of abstract concepts in human minds. In return, research on humans, relating core cognitive capacities to symbolic abilities, sheds light on the content of representations in animal minds. PMID:22927577

Spelke, Elizabeth S.; Lee, Sang Ah

2012-01-01

71

Three Corner Sat Communications System  

NASA Technical Reports Server (NTRS)

Three Corner Satellite is a constellation of three nanosatellites designed and built by students. New Mexico State University has taken on the design of the communications system for this constellation. The system includes the forward link, return link, and the crosslink. Due to size, mass, power, and financial constraints, we must design a small, light, power efficient, and inexpensive communications system. This thesis presents the design of a radio system to accomplish the data transmission requirements in light of the system constraints. In addition to the hardware design, the operational commands needed by the satellite's on-board computer to control and communicate with the communications hardware will be presented. In order for the hardware to communicate with the ground stations, we will examine the link budgets derived from the radiated power of the transmitters, link distance, data modulation, and data rate for each link. The antenna design for the constellation is analyzed using software and testing the physical antennas on a model satellite. After the analysis and testing, a combination of different systems will meet and exceed the requirements and constraints of the Three Corner Satellite constellation.

Anderson, Bobby; Horan, Stephen

2000-01-01

72

A Knowledge-Based Computer Animation System  

E-print Network

This paper reproduces part of a doctoral thesis proposal describing the design of a system capable of generating animated drawings in response to a simple story. The representation and interaction of the various sources ...

Kahn, Kenneth M.

73

Wireless Communications Systems, I Cellular Telephone System  

E-print Network

Standards 2nd Generation Digital Systems, 2G 1990: Global System for Mobile Comms (GSM) (66% of world at 1.9 GHz for cellular systems IS-95b, IS-95 was modified to provide data services GSM with dataWireless Communications Systems, I · Cellular Telephone System ­ US AMPS: Tx: 869-894 MHz, Rx: 824

Cetiner, Bedri A.

74

Animal Behavior & Communication. Animal Life in Action[TM]. Schlessinger Science Library. [Videotape].  

ERIC Educational Resources Information Center

This 23-minute videotape for grades 5-8, presents the myriad of animal life that exists on the planet. Students can view and perform experiments and investigations that help explain animal traits and habits. The way an animal acts or behaves helps it get what it needs to survive. Students find out why some animal behaviors are instinctive while…

2000

75

Video Communications Systems 2 LifeSize Video Communications Systems User Guide  

E-print Network

LifeSize® Video Communications Systems User Guide #12;2 LifeSize Video Communications Systems User-9301 #12;LifeSize Video Communications Systems User Guide 3 Welcome to LifeSize Video Communications Systems LifeSize high definition video communications systems enable anyone with dispersed colleagues

76

Degree project in Communication Systems  

E-print Network

A N O V A SIP Based Approach Green VoIP KTH Information and Communication Technology #12;. Green VoIP, examines, designs, implements, and evaluates with respect to energy efficiency a secure and robust VoIP system. This system utilizes a Session Initiation Protocol (SIP) infras- tructure assisted by a cloud

Maguire Jr., Gerald Q.

77

Communication Concepts for Mobile Agent Systems  

Microsoft Academic Search

Driven by the question how to identify potential communication partners and the need for well-suited communication schemes in agent-based systems, we discuss two communication concepts: sessions and global event management.

Joachim Baumann; Fritz Hohl; Nikolaos Radouniklis; Kurt Rothermel; Markus Straßer

1997-01-01

78

Advanced satellite communication system  

NASA Technical Reports Server (NTRS)

The objective of this research program was to develop an innovative advanced satellite receiver/demodulator utilizing surface acoustic wave (SAW) chirp transform processor and coherent BPSK demodulation. The algorithm of this SAW chirp Fourier transformer is of the Convolve - Multiply - Convolve (CMC) type, utilizing off-the-shelf reflective array compressor (RAC) chirp filters. This satellite receiver, if fully developed, was intended to be used as an on-board multichannel communications repeater. The Advanced Communications Receiver consists of four units: (1) CMC processor, (2) single sideband modulator, (3) demodulator, and (4) chirp waveform generator and individual channel processors. The input signal is composed of multiple user transmission frequencies operating independently from remotely located ground terminals. This signal is Fourier transformed by the CMC Processor into a unique time slot for each user frequency. The CMC processor is driven by a waveform generator through a single sideband (SSB) modulator. The output of the coherent demodulator is composed of positive and negative pulses, which are the envelopes of the chirp transform processor output. These pulses correspond to the data symbols. Following the demodulator, a logic circuit reconstructs the pulses into data, which are subsequently differentially decoded to form the transmitted data. The coherent demodulation and detection of BPSK signals derived from a CMC chirp transform processor were experimentally demonstrated and bit error rate (BER) testing was performed. To assess the feasibility of such advanced receiver, the results were compared with the theoretical analysis and plotted for an average BER as a function of signal-to-noise ratio. Another goal of this SBIR program was the development of a commercial product. The commercial product developed was an arbitrary waveform generator. The successful sales have begun with the delivery of the first arbitrary waveform generator.

Staples, Edward J.; Lie, Sen

1992-01-01

79

Communication synthesis for distributed embedded systems  

Microsoft Academic Search

Abstract: Communication synthesis is an essential step in hardware-software co-synthesis: many embedded systems use custom communication topologies and the communication links are often a significant part of the system cost. This paper describes new techniques for the analysis and synthesis of the communication requirements of embedded systems during co-synthesis. Our analysis algorithm derives delay bounds on communication in the system

Ti-Yen Yen; Wayne Wolf

1995-01-01

80

The ORBCOMM data communications system  

NASA Astrophysics Data System (ADS)

The ORBCOMM system is designed to provide low-cost, two-way data communications for mobile and remote users. The communications system is ideally configured for low data rate applications where communicating devices are geographically dispersed and two-way communications through terrestrial means is cumbersome and not cost effective. The remote terminals use VHF frequencies which allow for the use of very small, low-cost terminals. ORBCOMM has entered into joint development agreements with several large manufacturers of both consumer and industrial electronics to design and build the remote terminals. Based on prototype work, the estimated retail cost of these units will range from $50 to $400 depending on the complexity of the design. Starting in the fall of 1993, ORBCOMM will begin service with a demonstration network consisting of two operating satellites. By the end of 1994, a full operating network of 26 satellites, four Gateway Earth Stations, and a Network Control Center will be in place. The full constellation will provide full coverage of the entire world with greater than 94 percent communications availability for the continental U.S. This paper describes the ORBCOMM system, the technology used in its implementation, and its applications.

Schoen, David C.; Locke, Paul A.

81

The ORBCOMM data communications system  

NASA Technical Reports Server (NTRS)

The ORBCOMM system is designed to provide low-cost, two-way data communications for mobile and remote users. The communications system is ideally configured for low data rate applications where communicating devices are geographically dispersed and two-way communications through terrestrial means is cumbersome and not cost effective. The remote terminals use VHF frequencies which allow for the use of very small, low-cost terminals. ORBCOMM has entered into joint development agreements with several large manufacturers of both consumer and industrial electronics to design and build the remote terminals. Based on prototype work, the estimated retail cost of these units will range from $50 to $400 depending on the complexity of the design. Starting in the fall of 1993, ORBCOMM will begin service with a demonstration network consisting of two operating satellites. By the end of 1994, a full operating network of 26 satellites, four Gateway Earth Stations, and a Network Control Center will be in place. The full constellation will provide full coverage of the entire world with greater than 94 percent communications availability for the continental U.S. This paper describes the ORBCOMM system, the technology used in its implementation, and its applications.

Schoen, David C.; Locke, Paul A.

1993-01-01

82

Ultramicrowave communications system, phase 2  

NASA Technical Reports Server (NTRS)

Communications system design was completed and reviewed. Minor changes were made in order to make it more cost effective and to increase design flexibility. System design activities identified the techniques and procedures to generate and monitor high data rate test signals. Differential bi-phase demodulation is the proposed method for this system. The mockup and packaging designs were performed, and component layout and interconnection constraints were determined, as well as design drawings for dummy parts of the system. The possibility of adding a low cost option to the transceiver system was studied. The communications program has the advantage that new technology signal processing devices can be readily interfaced with the existing radio frequency subsystem to produce a short range radar.

1980-01-01

83

Cell-to-cell communication in plants, animals, and fungi: a comparative review  

NASA Astrophysics Data System (ADS)

Cell-to-cell communication is a prerequisite for differentiation and development in multicellular organisms. This communication has to be tightly regulated to ensure that cellular components such as organelles, macromolecules, hormones, or viruses leave the cell in a precisely organized way. During evolution, plants, animals, and fungi have developed similar ways of responding to this biological challenge. For example, in higher plants, plasmodesmata connect adjacent cells and allow communication to regulate differentiation and development. In animals, two main general structures that enable short- and long-range intercellular communication are known, namely gap junctions and tunneling nanotubes, respectively. Finally, filamentous fungi have also developed specialized structures called septal pores that allow intercellular communication via cytoplasmic flow. This review summarizes the underlying mechanisms for intercellular communication in these three eukaryotic groups and discusses its consequences for the regulation of differentiation and developmental processes.

Bloemendal, Sandra; Kück, Ulrich

2013-01-01

84

Degree project in Communication Systems  

E-print Network

A R A D O G A N Evaluating WebSocket and WebRTC in the Context of a Mobile Internet of Things Gateway KTH Information and Communication Technology #12;Evaluating WebSocket and WebRTC in the Context of a Mobile Internet of Things Gateway Gunay Mert Karadogan Master of Science Thesis Embedded Systems School

Maguire Jr., Gerald Q.

85

Communications satellite systems capacity analysis  

NASA Technical Reports Server (NTRS)

Analog and digital modulation techniques are compared with regard to efficient use of the geostationary orbit by communications satellites. Included is the definition of the baseline systems (both space and ground segments), determination of interference susceptibility, calculation of orbit spacing, and evaluation of relative costs. It is assumed that voice or TV is communicated at 14/11 GHz using either FM or QPSK modulation. Both the Fixed-Satellite Service and the Broadcasting-Satellite Service are considered. For most of the cases examined the digital approach requires a satellite spacing less than or equal to that required by the analog approach.

Browne, L.; Hines, T.; Tunstall, B.

1982-01-01

86

The HTV Proximity Communication System  

NASA Astrophysics Data System (ADS)

National Space Development Agency of Japan (NASDA) is developing the H-II Transfer Vehicle (HTV) as an unmanned logistic support vehicle for the International Space Station (ISS). The HTV, which is launched by the H-IIA rocket, transports both pressurized and un-pressurized cargoes to the ISS, reloads disposal items from the ISS and performs destructive reentry over ocean area. NASDA plans the first flight of HTV in 2005 for demonstration. The HTV will contribute the ISS assembly and logistic re-supply operations with international commonality. For unmanned vehicle operation, communication link is critical with commanding and control, especially in proximity region to the ISS. As for the HTV operation, NASDA is developing dedicated communication system installed on the Japanese Experiment Module (JEM) of the ISS, which is called the Proximity Communication System (PROX). The HTV receives commands and transmits telemetry data through the PROX in its proximity operation to the ISS. To achieve this, the PROX can communicate with the HTV on its nominal trajectory within 23km of the ISS. Especially within 3km of the ISS, the PROX has capability to perform omni-directional communication to the HTV. The PROX also has GPS receiver and send GPS data to the HTV to support the HTV navigation for relative GPS navigation used in "far" range (500m away from the ISS). In addition to the above fundamental functions, the PROX has a capability of range and range-rate measurement between the ISS and the HTV by the pseudo noise (PN) code epoch and the Doppler shift frequency. This provides a reference data independent of "main" navigation methods (rendezvous sensor navigation or GPS navigation) of the HTV. The PROX also assists the ISS crew with its commanding device, called the Hardware Command Panel (HCP), to issue time-dependent safety-related critical commands for HTV berthing/un-berthing operation. When a failure occurs somewhere on "communication path" from the PROX Base Band Processor (BBP) to the HTV Guidance and Control Computer (GCC) including data handling and communication equipments, the PROX detects it by monitoring interruption of the "heartbeat" signal and conducts automatic redundancy switching of all the equipments on that "communication path" including those of the HTV. This paper describes the PROX functions such as communication, data handling and GPS navigation and some unique functions for the HTV proximity operation to the ISS.

Harada, Motoyuki; Takahashi, Tetsuo; Tanaka, Tetsuo

2002-01-01

87

Time reversal communication system  

DOEpatents

A system of transmitting a signal through a channel medium comprises digitizing the signal, time-reversing the digitized signal, and transmitting the signal through the channel medium. The channel medium may be air, earth, water, tissue, metal, and/or non-metal.

Candy, James V. (Danville, CA); Meyer, Alan W. (Danville, CA)

2008-12-02

88

Creating Automated Interactive Video Playback for Studies of Animal Communications  

E-print Network

-time animations with video tracking software. This method may be used to conduct interactive playback experiments. To demonstrate this method, a prototype was created and used to conduct automated mating choice trials on female swordtail fish. The results...

Butkowski, Trisha

2010-01-16

89

Laser communication via atmosphere system  

NASA Astrophysics Data System (ADS)

By using light as a carrier, the information of voice and data is sent to a receiver through atmosphere, so this system with computer via some interfaces can be applied to link computers into network. This system has shown many advantages on volume weight flexibility, convenience, security and anti- interference. In this paper, firstly, the principle of a laser communication system is introduced, then the performance of LOC, GaAs, AlGaAs semiconductor lasers are presented; moreover, the basis of choosing photo-detector, the characteristic and usage of silicon avalanche photo-detectors, and the threshold detection and false-alarm ratio of the system are presented in detail.

Lu, Dong; Xiang, Yang; Zhang, Guangwei; Li, Shu

2000-10-01

90

46 CFR 130.440 - Communications system.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.440 Communications system. (a) Each OSV must have a communications...

2010-10-01

91

49 CFR 193.2519 - Communication systems.  

Code of Federal Regulations, 2012 CFR

...193.2519 Communication systems. (a) Each LNG plant must have a primary communication system that...all operating personnel at their work stations in the LNG plant. (b) Each LNG plant in excess of 70,000 gallons...

2012-10-01

92

49 CFR 193.2519 - Communication systems.  

Code of Federal Regulations, 2014 CFR

...193.2519 Communication systems. (a) Each LNG plant must have a primary communication system that...all operating personnel at their work stations in the LNG plant. (b) Each LNG plant in excess of 70,000 gallons...

2014-10-01

93

49 CFR 193.2519 - Communication systems.  

Code of Federal Regulations, 2011 CFR

...193.2519 Communication systems. (a) Each LNG plant must have a primary communication system that...all operating personnel at their work stations in the LNG plant. (b) Each LNG plant in excess of 70,000 gallons...

2011-10-01

94

49 CFR 193.2519 - Communication systems.  

Code of Federal Regulations, 2013 CFR

...193.2519 Communication systems. (a) Each LNG plant must have a primary communication system that...all operating personnel at their work stations in the LNG plant. (b) Each LNG plant in excess of 70,000 gallons...

2013-10-01

95

46 CFR 130.440 - Communications system.  

Code of Federal Regulations, 2011 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.440 Communications system. (a) Each OSV must have a communications...

2011-10-01

96

46 CFR 130.440 - Communications system.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.440 Communications system. (a) Each OSV must have a communications...

2012-10-01

97

46 CFR 130.440 - Communications system.  

Code of Federal Regulations, 2013 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.440 Communications system. (a) Each OSV must have a communications...

2013-10-01

98

46 CFR 130.440 - Communications system.  

Code of Federal Regulations, 2014 CFR

...DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.440 Communications system. (a) Each OSV must have a communications...

2014-10-01

99

Communicating Open Systems  

E-print Network

Just as conventional institutions are organisational structures for coordinating the activities of multiple interacting individuals, electronic institutions provide a computational analogue for coordinating the activities of multiple interacting software agents. In this paper, we argue that open multi-agent systems can be effectively designed and implemented as electronic institutions, for which we provide a comprehensive computational model. More specifically, the paper provides an operational semantics for electronic institutions, specifying the essential data structures, the state representation and the key operations necessary to implement them. We specify the agent workflow structure that is the core component of such electronic institutions and particular instantiations of knowledge representation languages that support the institutional model. In so doing, we provide the first formal account of the electronic institution concept in a rigorous and unambiguous way.

Mark d& apos; Inverno; Michael Luck; Pablo Noriega; Juan Rodriguez-Aguilar; Carles Sierra

2012-01-01

100

21 CFR 890.3700 - Nonpowered communication system.  

Code of Federal Regulations, 2010 CFR

... false Nonpowered communication system. 890.3700...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED...3700 Nonpowered communication system. (a) Identification. A nonpowered communication system is a...

2010-04-01

101

Short-range communication system  

NASA Technical Reports Server (NTRS)

A short-range communication system includes an antenna, a transmitter, and a receiver. The antenna is an electrical conductor formed as a planar coil with rings thereof being uniformly spaced. The transmitter is spaced apart from the plane of the coil by a gap. An amplitude-modulated and asynchronous signal indicative of a data stream of known peak amplitude is transmitted into the gap. The receiver detects the coil's resonance and decodes same to recover the data stream.

Alhorn, Dean C. (Inventor); Howard, David E. (Inventor); Smith, Dennis A. (Inventor)

2012-01-01

102

Trends in Automotive Communication Systems  

Microsoft Academic Search

The use of networks for communications between the electronic control units (ECU) of a vehicle in production cars dates from the beginning of the 1990s. The specific requirements of the different car domains have led to the development of a large number of automotive networks such as Local Interconnect Network, J1850, CAN, TTP\\/C, FlexRay, media-oriented system transport, IDB1394, etc. This

NICOLAS NAVET; YEQIONG SONG; FRANÇOISE SIMONOT-LION; CÉDRIC WILWERT

2005-01-01

103

Introduction The structure and function of animal communication signals, like  

E-print Network

structures may entail other nutritional or developmental costs (Andersson, 2000; Fitzpatrick, 1998; Mc of the animal's energy budget. Where the interests of signaler and receiver are strategically aligned (Searcy, the proportion of the energy budget allocated to signal production ranges from almost nothing for many signals

Stoddard, Philip

104

Complex biological memory conceptualized as an abstract communication system -human  

E-print Network

, Newcastle upon TYne, NE1 7RU, UK 1.1 Summary Biological memory in humans and other animals with a central1 Complex biological memory conceptualized as an abstract communication system -human long term memories grow in complexity during sleep and undergo selection while awake Bruce G Charlton and Peter

Newcastle upon Tyne, University of

105

Advances in Small Animal Imaging Systems  

SciTech Connect

The rapid growth in genetics and molecular biology combined with the development of techniques for genetically engineering small animals has led to an increased interest in in vivo laboratory animal imaging during the past few years. For this purpose, new instrumentation, data acquisition strategies, and image processing and reconstruction techniques are being developed, researched and evaluated. The aim of this article is to give a short overview of the state of the art technologies for high resolution and high sensitivity molecular imaging techniques, primarily positron emission tomography (PET) and single photon emission computed tomography (SPECT). The basic needs of small animal imaging will be described. The evolution in instrumentation in the past two decades, as well as the commercially available systems will be overviewed. Finally, the new trends in detector technology and preliminary results from challenging applications will be presented. For more details a number of references are provided.

Loudos, George K. [Department of Medical Instrumentation Technology, Technological Educational Institute of Athens (Greece)

2007-11-26

106

Communication System Architecture for Planetary Exploration  

NASA Technical Reports Server (NTRS)

Future human missions to Mars will require effective communications supporting exploration activities and scientific field data collection. Constraints on cost, size, weight and power consumption for all communications equipment make optimization of these systems very important. These information and communication systems connect people and systems together into coherent teams performing the difficult and hazardous tasks inherent in planetary exploration. The communication network supporting vehicle telemetry data, mission operations, and scientific collaboration must have excellent reliability, and flexibility.

Braham, Stephen P.; Alena, Richard; Gilbaugh, Bruce; Glass, Brian; Norvig, Peter (Technical Monitor)

2001-01-01

107

Adapting the Laban Effort System to Design Affect-Communicating Locomotion Path for a  

E-print Network

Adapting the Laban Effort System to Design Affect-Communicating Locomotion Path for a Flying Robot Affect-Communicating Locomotion Path for a Flying Robot Abstract People and animals use various kinds this locomotion-style communication channel for com- municating their states to people. One problem in leveraging

108

Animal communication: ideas derived from Tiribergen’s activities  

Microsoft Academic Search

When I was a new research student in the late 1960s, four things struck me about Niko Tinbergen. The first was the breadth\\u000a of his approach. I personally benefited greatly from this because I wanted to study a problem in population ecology and I\\u000a ended up in his Animal Behaviour Group. Niko quite rightly saw no real distinction between the

John R. Krebs

109

Communications Systems for Mobile Robotics  

SciTech Connect

Performance Confirmation is the activity by which the Yucca Mountain Project confirms that the engineered and natural containment barriers of this national nuclear waste repository are performing as predicted, so that an eventual decision to close the repository can be made. This activity involves systems that must be inspected and, in some cases, serviced by mobile robots. This paper discusses systems for underground mobile robot communications, including requirements, environments, options, issues, and down-select criteria. We reviewed a variety of systems, including Slotted Waveguide, Powerline Carrier, Leaky Feeder, Photonic Bandgap Fiber, Free-Space Optics, Millimeter Waves, Terahertz Systems, and RF Systems (including IEEE 802.11 a,b, and g, and Ultra-Wideband radio).

Futterman, J A; Pao, H

2003-12-08

110

Ris Energy Report 4 System control and communication 4 9 System control and communication  

E-print Network

Risø Energy Report 4 System control and communication 4 9 System control and communication HENRIK b rooms. Robustness in communication and information systems is very important and decen- tralised control and balance markets. To operate successfully, all these markets require a good communication infrastructure

111

33 CFR 127.1111 - Communication systems.  

Code of Federal Regulations, 2010 CFR

...possess a communication system that enables continuous two way voice communication between the person in charge of transfer aboard...intrinsically safe by Underwriters Laboratories, Inc., Factory Mutual Research Corporation, or other independent laboratory recognized...

2010-07-01

112

33 CFR 127.1111 - Communication systems.  

Code of Federal Regulations, 2011 CFR

...possess a communication system that enables continuous two way voice communication between the person in charge of transfer aboard...intrinsically safe by Underwriters Laboratories, Inc., Factory Mutual Research Corporation, or other independent laboratory recognized...

2011-07-01

113

47 CFR 90.465 - Control of systems of communication.  

Code of Federal Regulations, 2011 CFR

... false Control of systems of communication. 90.465 Section 90.465 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...465 Control of systems of communication. (a) Depending on...

2011-10-01

114

47 CFR 90.465 - Control of systems of communication.  

Code of Federal Regulations, 2010 CFR

... false Control of systems of communication. 90.465 Section 90.465 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...465 Control of systems of communication. (a) Depending on...

2010-10-01

115

47 CFR 90.465 - Control of systems of communication.  

Code of Federal Regulations, 2013 CFR

... false Control of systems of communication. 90.465 Section 90.465 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...465 Control of systems of communication. (a) Depending on...

2013-10-01

116

47 CFR 90.465 - Control of systems of communication.  

Code of Federal Regulations, 2012 CFR

... false Control of systems of communication. 90.465 Section 90.465 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY...465 Control of systems of communication. (a) Depending on...

2012-10-01

117

The Anima Animation System, Version 2.0  

E-print Network

in the film and game industries. Animation software has become an important Canadian industry, dueThe Anima Animation System, Version 2.0 Danielle Sauer, Jared Gabruch, Cara Gibbs, Howard Hamilton...........................................................................................................2 2. Animation Software

Hamilton, Howard J.

118

Study of the neural dynamics for understanding communication in terms of complex hetero systems.  

PubMed

The purpose of the research project was to establish a new research area named "neural information science for communication" by elucidating its neural mechanism. The research was performed in collaboration with applied mathematicians in complex-systems science and experimental researchers in neuroscience. The project included measurements of brain activity during communication with or without languages and analyses performed with the help of extended theories for dynamical systems and stochastic systems. The communication paradigm was extended to the interactions between human and human, human and animal, human and robot, human and materials, and even animal and animal. PMID:25455742

Tsuda, Ichiro; Yamaguchi, Yoko; Hashimoto, Takashi; Okuda, Jiro; Kawasaki, Masahiro; Nagasaka, Yasuo

2015-01-01

119

Wireless augmented reality communication system  

NASA Technical Reports Server (NTRS)

The system of the present invention is a highly integrated radio communication system with a multimedia co-processor which allows true two-way multimedia (video, audio, data) access as well as real-time biomedical monitoring in a pager-sized portable access unit. The system is integrated in a network structure including one or more general purpose nodes for providing a wireless-to-wired interface. The network architecture allows video, audio and data (including biomedical data) streams to be connected directly to external users and devices. The portable access units may also be mated to various non-personal devices such as cameras or environmental sensors for providing a method for setting up wireless sensor nets from which reported data may be accessed through the portable access unit. The reported data may alternatively be automatically logged at a remote computer for access and viewing through a portable access unit, including the user's own.

Devereaux, Ann (Inventor); Jedrey, Thomas (Inventor); Agan, Martin (Inventor)

2006-01-01

120

Wireless Augmented Reality Communication System  

NASA Technical Reports Server (NTRS)

The system of the present invention is a highly integrated radio communication system with a multimedia co-processor which allows true two-way multimedia (video, audio, data) access as well as real-time biomedical monitoring in a pager-sized portable access unit. The system is integrated in a network structure including one or more general purpose nodes for providing a wireless-to-wired interface. The network architecture allows video, audio and data (including biomedical data) streams to be connected directly to external users and devices. The portable access units may also be mated to various non-personal devices such as cameras or environmental sensors for providing a method for setting up wireless sensor nets from which reported data may be accessed through the portable access unit. The reported data may alternatively be automatically logged at a remote computer for access and viewing through a portable access unit, including the user's own.

Devereaux, Ann (Inventor); Jedrey, Thomas (Inventor); Agan, Martin (Inventor)

2014-01-01

121

Spacecraft Multiple Array Communication System Performance Analysis  

NASA Technical Reports Server (NTRS)

The Communication Systems Simulation Laboratory (CSSL) at the NASA Johnson Space Center is tasked to perform spacecraft and ground network communication system simulations, design validation, and performance verification. The CSSL has developed simulation tools that model spacecraft communication systems and the space and ground environment in which the tools operate. In this paper, a spacecraft communication system with multiple arrays is simulated. Multiple array combined technique is used to increase the radio frequency coverage and data rate performance. The technique is to achieve phase coherence among the phased arrays to combine the signals at the targeting receiver constructively. There are many technical challenges in spacecraft integration with a high transmit power communication system. The array combining technique can improve the communication system data rate and coverage performances without increasing the system transmit power requirements. Example simulation results indicate significant performance improvement can be achieved with phase coherence implementation.

Hwu, Shian U.; Desilva, Kanishka; Sham, Catherine C.

2010-01-01

122

Designing the Communications Infrastructure of Groupware Systems  

Microsoft Academic Search

In the development of groupware systems a well designed communications infrastructure is required, due to the high complexity of the communication scenario. Also, the design and implementation of coordination and collaboration mechanisms depends on the communications infrastructure. Actually there are no well known guidelines to design this infrastructure. Therefore, this paper proposes an architectural pattern that helps carry out the

Sergio F. Ochoa; Luis A. Guerrero; David A. Fuller; Oriel A. Herrera

2002-01-01

123

The Aerospace Corporation 2009 Communication Satellite Systems  

E-print Network

© The Aerospace Corporation 2009 Communication Satellite Systems Trends and Network Aspects Paul://www.aero.org/ Lee Center, Caltech 13 April 2009 #12;22 Communication Satellites · Brief History by Decade · Trends: ­ Communication Satellites, fifth edition, by D. Martin, P. Anderson, L. Bartamian, Aerospace / AIAA Press, 2006

Low, Steven H.

124

Considerations for lunar colony communications systems  

NASA Technical Reports Server (NTRS)

This paper addresses system aspects of communications for a lunar colony. Human factors are particularly noted. The practical aspects of communications infrastructure are emphasized rather than specific technologies. Communications needs for mission support and morale are discussed along with potential means of satisfying them. Problem areas are identified and some possible solutions are considered.

Dowling, Richard P.

1992-01-01

125

Montana State University 1 Animal Systems Option  

E-print Network

be taken in the spring. Recommended Electives ANSC 320 Animal Nutrition 4 ANSC 321 Physiology of Animal Microbial Physiology 3 BIOO 310 Comparative Vertebrate Anatomy 4 BIOO 412 Animal Physiology 3 EQUS 327

Maxwell, Bruce D.

126

COMMANIMATION : a speech-controlled animation system  

E-print Network

In order to make the task of animation creation easy, a different approach should be presented to the user. This thesis describes a new approach to animation creation. In this approach, the representation of animation is ...

Kho, Nancy Ellen, 1981-

2004-01-01

127

Tools for studying animal behaviour: validation of dive profiles relayed via the Argos satellite system  

E-print Network

Tools for studying animal behaviour: validation of dive profiles relayed via the Argos satellite satellite system (http://www.argosinc.com). Behavioural data relayed remotely via the Argos satellite system of their time submerged, further limiting the time available for communication with satel- lites. The problem

Hays, Graeme

128

Software-defined Quantum Communication Systems  

SciTech Connect

We show how to extend the paradigm of software-defined communication to include quantum communication systems. We introduce the decomposition of a quantum communication terminal into layers separating the concerns of the hardware, software, and middleware. We provide detailed descriptions of how each component operates and we include results of an implementation of the super-dense coding protocol. We argue that the versatility of software-defined quantum communication test beds can be useful for exploring new regimes in communication and rapidly prototyping new systems.

Humble, Travis S [ORNL] [ORNL; Sadlier, Ronald J [ORNL] [ORNL

2013-01-01

129

Animals  

NSDL National Science Digital Library

Explore the wonderful world of animals Listen to the animal sound. See if you can identify the animal.Animal sounds. Explore and find out about different animals.Kids Planet Create a animal report using one of the animals found in the web site.Kids Planet,SeaWorld/animals Create a picture of your animal examples are found...Your big backyard ...

Mrs. Unsworth

2005-03-31

130

Transition From NASA Space Communication Systems to Commerical Communication Products  

NASA Technical Reports Server (NTRS)

Transitioning from twenty-five years of space communication system architecting, engineering and development to creating and marketing of commercial communication system hardware and software products is no simple task for small, high-tech system engineering companies whose major source of revenue has been the U.S. Government. Yet, many small businesses are faced with this onerous and perplexing task. The purpose of this talk/paper is to present one small business (LinCom) approach to taking advantage of the systems engineering expertise and knowledge captured in physical neural networks and simulation software by supporting numerous National Aeronautics and Space Administration (NASA) and the Department of Defense (DoD) projects, e.g., Space Shuttle, TDRSS, Space Station, DCSC, Milstar, etc. The innovative ingredients needed for a systems house to transition to a wireless communication system products house that supports personal communication services and networks (PCS and PCN) development in a global economy will be discussed. Efficient methods for using past government sponsored space system research and development to transition to VLSI communication chip set products will be presented along with notions of how synergy between government and industry can be maintained to benefit both parties.

Ghazvinian, Farzad; Lindsey, William C.

1994-01-01

131

Software-defined Quantum Communication Systems  

E-print Network

Quantum communication systems harness modern physics through state-of-the-art optical engineering to provide revolutionary capabilities. An important concern for quantum communication engineering is designing and prototyping these systems to evaluate proposed capabilities. We apply the paradigm of software-defined communication for engineering quantum communication systems to facilitate rapid prototyping and prototype comparisons. We detail how to decompose quantum communication terminals into functional layers defining hardware, software, and middleware concerns, and we describe how each layer behaves. Using the super-dense coding protocol as an example, we describe implementations of both the transmitter and receiver, and we present results from numerical simulations of the behavior. We conclude that software-defined quantum communication provides a robust framework in which to explore the large design space offered by this new regime of communication.

Travis S. Humble; Ronald J. Sadlier

2014-10-20

132

Apollo experience report: Lunar module communications system  

NASA Technical Reports Server (NTRS)

The development of the lunar module communications system is traced from the initial concept to the operational system used on manned lunar missions. The problems encountered during the development, the corrective actions taken, and recommendations for similar equipment in future programs are included. The system was designed to provide communications between the lunar module and the manned space flight network, between the lunar module and the command and service module, and between the lunar module and the extravehicular crewmen. The system provided the equipment necessary for voice, telemetry, and television communications; ranging information; and various communications links.

Dietz, R. H.; Rhoades, D. E.; Davidson, L. J.

1972-01-01

133

Smart Grid Communications System Blueprint  

NASA Astrophysics Data System (ADS)

Telecommunications operators are well versed in deploying 2G and 3G wireless networks. These networks presently support the mobile business user and/or retail consumer wishing to place conventional voice calls and data connections. The electrical power industry has recently commenced transformation of its distribution networks by deploying smart monitoring and control devices throughout their networks. This evolution of the network into a `smart grid' has also motivated the need to deploy wireless technologies that bridge the communication gap between the smart devices and information technology systems. The requirements of these networks differ from traditional wireless networks that communications operators have deployed, which have thus far forced energy companies to consider deploying their own wireless networks. We present our experience in deploying wireless networks to support the smart grid and highlight the key properties of these networks. These characteristics include application awareness, support for large numbers of simultaneous cell connections, high service coverage and prioritized routing of data. We also outline our target blueprint architecture that may be useful to the industry in building wireless and fixed networks to support the smart grid. By observing our experiences, telecommunications operators and equipment manufacturers will be able to augment their current networks and products in a way that accommodates the needs of the emerging industry of smart grids and intelligent electrical networks.

Clark, Adrian; Pavlovski, Chris

2010-10-01

134

Rugged Video System For Inspecting Animal Burrows  

NASA Technical Reports Server (NTRS)

Video system designed for examining interiors of burrows of gopher tortoises, 5 in. (13 cm) in diameter or greater, to depth of 18 ft. (about 5.5 m), includes video camera, video cassette recorder (VCR), television monitor, control unit, and power supply, all carried in backpack. Polyvinyl chloride (PVC) poles used to maneuver camera into (and out of) burrows, stiff enough to push camera into burrow, but flexible enough to bend around curves. Adult tortoises and other burrow inhabitants observable, young tortoises and such small animals as mice obscured by sand or debris.

Triandafils, Dick; Maples, Art; Breininger, Dave

1992-01-01

135

A Future of Communication Theory: Systems Theory.  

ERIC Educational Resources Information Center

Concepts of general systems theory, cybernetics and the like may provide the methodology for communication theory to move from a level of technology to a level of pure science. It was the purpose of this paper to (1) demonstrate the necessity of applying systems theory to the construction of communication theory, (2) review relevant systems

Lindsey, Georg N.

136

Communication architecture of an early warning system  

NASA Astrophysics Data System (ADS)

This article discusses aspects of communication architecture for early warning systems (EWS) in general and gives details of the specific communication architecture of an early warning system against tsunamis. While its sensors are the "eyes and ears" of a warning system and enable the system to sense physical effects, its communication links and terminals are its "nerves and mouth" which transport measurements and estimates within the system and eventually warnings towards the affected population. Designing the communication architecture of an EWS against tsunamis is particularly challenging. Its sensors are typically very heterogeneous and spread several thousand kilometers apart. They are often located in remote areas and belong to different organizations. Similarly, the geographic spread of the potentially affected population is wide. Moreover, a failure to deliver a warning has fatal consequences. Yet, the communication infrastructure is likely to be affected by the disaster itself. Based on an analysis of the criticality, vulnerability and availability of communication means, we describe the design and implementation of a communication system that employs both terrestrial and satellite communication links. We believe that many of the issues we encountered during our work in the GITEWS project (German Indonesian Tsunami Early Warning System, Rudloff et al., 2009) on the design and implementation communication architecture are also relevant for other types of warning systems. With this article, we intend to share our insights and lessons learned.

Angermann, M.; Guenther, M.; Wendlandt, K.

2010-11-01

137

Wireless Augmented Reality Communication System  

NASA Technical Reports Server (NTRS)

A portable unit is for video communication to select a user name in a user name network. A transceiver wirelessly accesses a communication network through a wireless connection to a general purpose node coupled to the communication network. A user interface can receive user input to log on to a user name network through the communication network. The user name network has a plurality of user names, at least one of the plurality of user names is associated with a remote portable unit, logged on to the user name network and available for video communication.

Devereaux, Ann (Inventor); Jedrey, Thomas (Inventor); Agan, Martin (Inventor)

2015-01-01

138

EXPOSURE SYSTEMS AND ASSESSMENT FOR SEVERAL ANIMAL EXPERIMENTS IN JAPAN  

Microsoft Academic Search

Possible health effects of exposure to electromagnetic field (EMF) have become a great concern of the general public. Therefore, many animal experiments have been conducted. For the animal experiments, the development of desirable exposure system and precise exposure assessment are important. We developed several exposure systems for animal experiments in Japan. The head localized microwave exposure systems for rats with

Kanako Wake; Masahiro Hanazawa; Soichi Watanabe; Osamu Fujiwara; Masao Taki

139

Human Factors Aspects of Power System Flow Animation  

E-print Network

Human Factors Aspects of Power System Flow Animation Douglas A. Wiegmann, Gavin R. Essenberg experimental results associated with human factors aspects of using animation to display electric power system at Urbana-Champaign using electric power system students. The results indicate that animated motion of power

140

MUAN: A Stop Motion Animation System Margareth Catoia Varela1  

E-print Network

MUAN: A Stop Motion Animation System Margareth Catoia Varela1 , Luiz Velho1 , Bruno Madeira1,lvelho,madeira,hedlena }@impa.br, marcos@animamundi.com.br Abstract. MUAN is a Stop Motion Animation System for Education. The MUAN system allows animation movie production offering an integrated kit of hardware and software

Paris-Sud XI, Université de

141

A high sensitivity small animal SPECT system  

PubMed Central

Medical imaging using single gamma ray emitting radionuclides typically makes use of parallel hole collimators or pinholes in order to achieve good spatial resolution. However, a tradeoff in sensitivity is inherent in the use of a collimator, and modern preclinical SPECT (single photon emission computed tomography) systems detect a very small fraction of emitted gamma rays, often less than 0.1%. A system for small animal SPECT imaging which uses no collimators could potentially achieve very high sensitivity—several tens of percent—with reasonably sized detectors. This would allow two significant improvements in preclinical studies: images could be obtained more rapidly, allowing higher throughput for screening applications, or for dynamic processes to be observed with very good time resolution; and images could be obtained with less radioactive tracer, making possible the in vivo imaging of low-capacity receptor systems, aiding research into new tracer compounds, and reducing the cost and easing the regulatory burden of an experiment. Of course, a system with no collimator will not be able to approach the sub-millimeter spatial resolutions produced by the most advanced pinhole and collimated systems, but a high sensitivity system with resolution of order one centimeter could nonetheless find significant and new use in the many molecular imaging applications which do not require good spatial resolution—for example, screening applications for drug development or new imaging agents. Rather than as an alternative to high resolution SPECT systems, the high sensitivity system is proposed as a radiotracer alternative to optical imaging for small animals. We have developed a prototype system for mouse imaging applications. The scanner consists of two large, thin, closely spaced scintillation detectors. Simulation studies indicate that a FWHM spatial resolution of 7 mm is possible. In an in vivo mouse imaging study using the 99mTc labeled tracer MAG-3, the sensitivity of the system is measured to be 40%. Simple projection images created by analytically combining the two detectors' data show sufficient resolution to observe the dynamic distribution of the radiotracer in the mouse. PMID:19190360

Mitchell, Gregory S; Cherry, Simon R

2009-01-01

142

Scripting Affective Communication with Life-Like Characters in Web-Based Interaction Systems  

Microsoft Academic Search

In this paper, we discuss scripting tools that aim at facilitating the design of web-based interactions with animated characters capable of afiective communication. Speciflcally, two systems are developed. The SCREAM system is a scripting tool that enables au- thors to create emotionally and socially appropriate responses of animated characters. Content authors may design the mental make-up of a character by

Helmut Prendinger; Sylvain Descamps; Mitsuru Ishizuka

2002-01-01

143

Animal biocalorimeter and waste management system  

NASA Technical Reports Server (NTRS)

A biocalorimeter and waste management system is provided for making metabolic heat release measurements of animals or humans in a calorimeter (enclosure) using ambient air as a low velocity source of ventilating air through the enclosure. A shroud forces ventilating air to pass over the enclosure from an end open to ambient air at the end of the enclosure opposite its ventilating air inlet end and closed around the inlet end of the enclosure in order to obviate the need for regulating ambient air temperature. Psychrometers for measuring dry- and wet-bulb temperature of ventilating air make it possible to account for the sensible and latent heat additions to the ventilating air. A waste removal system momentarily recirculates high velocity air in a closed circuit through the calorimeter wherein a sudden rise in moisture is detected in the ventilating air from the outlet.

Poppendiek, Heinz F. (Inventor); Trimailo, William R. (Inventor)

1995-01-01

144

Systems and Methods for Radar Data Communication  

NASA Technical Reports Server (NTRS)

A radar information processing system is operable to process high bandwidth radar information received from a radar system into low bandwidth radar information that may be communicated to a low bandwidth connection coupled to an electronic flight bag (EFB). An exemplary embodiment receives radar information from a radar system, the radar information communicated from the radar system at a first bandwidth; processes the received radar information into processed radar information, the processed radar information configured for communication over a connection operable at a second bandwidth, the second bandwidth lower than the first bandwidth; and communicates the radar information from a radar system, the radar information communicated from the radar system at a first bandwidth.

Bunch, Brian (Inventor); Szeto, Roland (Inventor); Miller, Brad (Inventor)

2013-01-01

145

A Wireless Communications Systems Laboratory Course  

ERIC Educational Resources Information Center

A novel wireless communications systems laboratory course is introduced. The course teaches students how to design, test, and simulate wireless systems using modern instrumentation and computer-aided design (CAD) software. One of the objectives of the course is to help students understand the theoretical concepts behind wireless communication

Guzelgoz, Sabih; Arslan, Huseyin

2010-01-01

146

System Design for Cognitive Radio Communications  

E-print Network

System Design for Cognitive Radio Communications Mustafa E. S¸ahin and H¨useyin Arslan Electrical about an increasing demand for frequency spectrum. Cognitive radio offers a tempting solution radio communications. In this paper, a comprehensive system design for cognitive radio is presented

Arslan, Hüseyin

147

Organization of Communication in Information Systems.  

ERIC Educational Resources Information Center

Organization of communication between the center of an automated system of information exchange and the subscribers to the system is described. The three requirements are: (1) those technical communication means must be chosen which will provide effective and convenient avenues for calls from the subscribers to the center, (2) the required…

Datsenko, V. P.; Zaytsev, N. G.

148

How do communication systems emerge?  

PubMed Central

Communication involves a pair of behaviours—a signal and a response—that are functionally interdependent. Consequently, the emergence of communication involves a chicken-and-egg problem: if signals and responses are dependent on one another, then how does such a relationship emerge in the first place? The empirical literature suggests two solutions to this problem: ritualization and sensory manipulation; and instances of ritualization appear to be more common. However, it is not clear from a theoretical perspective why this should be the case, nor if there are any other routes to communication. Here, we develop an analytical model to examine how communication can emerge. We show that: (i) a state of non-interaction is evolutionarily stable, and so communication will not necessarily emerge even when it is in both parties' interest; (ii) the conditions for sensory manipulation are more stringent than for ritualization, and hence ritualization is likely to be more common; and (iii) communication can arise by a third route, when the intention to communicate can itself be communicated, but this may be limited to humans. More generally, our results demonstrate the utility of a functional approach to communication. PMID:22217724

Scott-Phillips, Thomas C.; Blythe, Richard A.; Gardner, Andy; West, Stuart A.

2012-01-01

149

SRS Computer Animation and Drive Train System  

NASA Technical Reports Server (NTRS)

The spinning rocket simulator (SRS) is an ongoing project at Oral Roberts University. The goal of the SRS is to gather crucial data concerning a spinning rocket under thrust for the purpose of analysis and correction of the coning motion experienced by this type of spacecraft maneuver. The computer animation simulates a virtual, scale model of the component of the SRS that represents the spacecraft itself. This component is known as the (VSM), or virtual spacecraft model. During actual physical simulation, this component of the SRS will experience a coning. The goal of the animation is to cone the VSM within that range to accurately represent the motion of the actual simulator. The drive system of the SRS is the apparatus that turns the actual simulator. It consists of a drive motor, motor mount and chain to power the simulator into motion. The motor mount is adjustable and rigid for high torque application. A digital stepper motor controller actuates the main drive motor for linear acceleration. The chain transfers power from the motor to the simulator via sprockets on both ends.

Arthun, Daniel; Schachner, Christian

2001-01-01

150

TANGO: A FRAMEWORK AND SYSTEM FOR ALGORITHM ANIMATION  

Microsoft Academic Search

Algorithm animation is the process of abstracting the data, operations, and semantics of computer programs, and then creating animated graphical views of those abstractions. Although a handful of algorithm animation systems have been developed in recent years, relatively little work has been done on the theoretical foundations of such systems. In this work we develop a conceptual framework with formal

John T. Stasko

1990-01-01

151

Real-Time Location Estimation System for Wild Animals  

Microsoft Academic Search

It is a very serious problem that many kinds of development projects threaten the ecosystem of wild animals. Before and after the projects, it is required to assess the change of the ecosystem. An animal location estimation system has been developed for this purpose. The system consists of small transmitters which are attached to the wild animals, and receiver stations

Jun-ichi Abe; Jun-ichi Takada

152

Roadside-based communication system and method  

NASA Technical Reports Server (NTRS)

A roadside-based communication system providing backup communication between emergency mobile units and emergency command centers. In the event of failure of a primary communication, the mobile units transmit wireless messages to nearby roadside controllers that may take the form of intersection controllers. The intersection controllers receive the wireless messages, convert the messages into standard digital streams, and transmit the digital streams along a citywide network to a destination intersection or command center.

Bachelder, Aaron D. (Inventor)

2007-01-01

153

Satellite Communication Hardware Emulation System (SCHES)  

NASA Technical Reports Server (NTRS)

Satellite Communication Hardware Emulator System (SCHES) is a powerful simulator that emulates the hardware used in TDRSS links. SCHES is a true bit-by-bit simulator that models communications hardware accurately enough to be used as a verification mechanism for actual hardware tests on user spacecraft. As a credit to its modular design, SCHES is easily configurable to model any user satellite communication link, though some development may be required to tailor existing software to user specific hardware.

Kaplan, Ted

1993-01-01

154

A Distant Solar System (Artist's Concept Animation)  

NASA Technical Reports Server (NTRS)

This animation portrays an artist's concept of a distant hypothetical solar system, about the same age as our own. It begins close to the star, and then moves out past a number of planets. Though 'extrasolar' planets are too small to be seen with telescopes, astronomers have detected more than 100 gas giants like Jupiter via their gravitational tug on their parent stars.

The view pulls back to reveal the outer fringes of the system and a ring of dusty debris that circles the star. This debris is all that remains of the planet-forming disk from which the planets evolved.

Planets are formed when dusty material in a large disk surrounding a young star clumps together. Leftover material is eventually blown out by solar wind or pushed out by gravitational interactions with planets. Billions of years later, only an outer disk of debris remains.

These outer debris disks are too faint to be imaged directly by visible-light telescopes. They are washed out by the glare of the Sun. However, NASA's Spitzer Space Telescope can detect their heat, or excess thermal emission, in infrared light. This allows astronomers to study the aftermath of planet building in distant solar systems like our own.

2004-01-01

155

Planning animation cinematography and shot structure to communicate theme and mood  

Microsoft Academic Search

Standard techniques, such as soundtrack recording, storyboarding and key-framing, are used to create animation adaptations of narratives. Many aspects of the narrative, such as moods, themes, character motivations and plot, must he captured in the audio-visual medium. Our work focusses on achieving the communication of moods and themes solely through the application of well-known cinematography techniques. We present a planning

Kevin Kennedy; Robert E. Mercer

2002-01-01

156

Data-base driven graphics animation and simulation system  

SciTech Connect

Most attempts at the graphics animation of data involve rather large and expensive development of problem-specific systems. This paper discusses a general graphics animation system created to be a tool for the design of a wide variety of animated simulations. By using relational data base storage of graphics and control information, considerable flexibility in the design and development of animated displays is achieved.

Stewart, H.D.; Curtis, J.N.

1985-01-01

157

21 CFR 890.3710 - Powered communication system.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Powered communication system. 890.3710...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED...890.3710 Powered communication system. (a) Identification. A powered communication system is an...

2010-04-01

158

29 CFR 1915.85 - Vessel radar and communication systems.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Vessel radar and communication systems. 1915.85...Working Conditions § 1915.85 Vessel radar and communication systems. (a) The employer shall service each vessel's radar and communication systems in...

2014-07-01

159

29 CFR 1915.85 - Vessel radar and communication systems.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Vessel radar and communication systems. 1915.85...Working Conditions § 1915.85 Vessel radar and communication systems. (a) The employer shall service each vessel's radar and communication systems in...

2013-07-01

160

29 CFR 1915.85 - Vessel radar and communication systems.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Vessel radar and communication systems. 1915.85...Working Conditions § 1915.85 Vessel radar and communication systems. (a) The employer shall service each vessel's radar and communication systems in...

2012-07-01

161

Degree project in Communication Systems  

E-print Network

IPv6 networks KTH Information and Communication Technology #12;KTH Royal Institute of Technology critical. With ipv6 comes new security threats (while still old threats remain) that requires................................................................................................................................... iv List of Figures

Maguire Jr., Gerald Q.

162

How to Bootstrap a Human Communication System  

ERIC Educational Resources Information Center

How might a human communication system be bootstrapped in the absence of conventional language? We argue that motivated signs play an important role (i.e., signs that are linked to meaning by structural resemblance or by natural association). An experimental study is then reported in which participants try to communicate a range of pre-specified…

Fay, Nicolas; Arbib, Michael; Garrod, Simon

2013-01-01

163

Communication Issues in Pervasive Healthcare Systems and  

E-print Network

Chapter 10 Communication Issues in Pervasive Healthcare Systems and Applications Demosthenes provides a systematic analysis of the communication technologies used in healthcare and homecare, their applications and the utilization of the mobile technologies in the healthcare sector by using in addition case

Vouyioukas, Demosthenes

164

Preliminary Thoughts on Netted Cable Communication Systems.  

ERIC Educational Resources Information Center

There are five categories of cable communication systems: Conventional Community Antenna Television (CATV), Pay-TV, Subscriber Response Systems, Electronic Information Handling Systems, and Two-Way Audio/Visual Systems. CATV and Pay-TV systems are designed for the one-way transmission of programs, the former providing for better quality…

Eldridge, Frank; Mason, William

165

Development of a sign language communication system between Japanese and Korean  

Microsoft Academic Search

In this paper, we propose a method of sign language communication between different languages using computer graphics (CG) animation. A CG animation system for representing sign languages was developed using MATLAB. We focused on translation between Japanese and Korean, since these two languages have several similarities. The sign languages used in Japan and Korea are also similar in several aspects.

Jincan Li; Y. Aoki; Sang Woon Kim

1998-01-01

166

SWINE PRODUCTION SYSTEMS: ANIMAL WELFARE CONSIDERATIONS  

Technology Transfer Automated Retrieval System (TEKTRAN)

A general public perception is that it is easy to visualize when an animals welfare is adequate. Scientifically, this determination is quite difficult. The difficulty resides in our ability to objectively assess the animals physical and psychological state; as well as to determine the difference b...

167

Economics of satellite communications systems  

NASA Astrophysics Data System (ADS)

This paper is partly a tutorial, telling systematically how one goes about calculating the total annual costs of a satellite communications system, and partly the expression of some original ideas on the choice of parameters so as to minimize these costs. The calculation of costs can be divided into two broad categories. The first is technical and is concerned with estimating what particular equipment will cost and what will be the annual expense to maintain and operate it. One starts in the estimation of any new system by listing the principal items of equipment, such as satellites, earth stations of various sizes and functions, telemetry and tracking equipment and terrestrial interfaces, and then estimating how much each item will cost. Methods are presented for generating such estimates, based on a knowledge of the gross parameters, such as antenna size, coverage area, transmitter power and information rate. These parameters determine the system performance and it is usually possible, knowing them, to estimate the costs of the equipment rather well. Some formulae based on regression analyses are presented. Methods are then given for estimating closely related expenses, such as maintenance and operation, and then an approximate method is developed for estimating terrestrial interconnection costs. It is pointed out that in specific cases when tariff and geographical information are available, it is usually better to work with specific data, but nonetheless it is often desirable, especially in global system estimating, to approximate these interconnect costs without recourse to individual tariffs. The procedure results in a set of costs for the purchase of equipment and its maintenance, and a schedule of payments. Some payments will be incurred during the manufacture of the satellite and before any systems operation, but many will not be incurred until the system is no longer in use, e.g. incentives. In any case, with the methods presented in the first section, one arrives at a schedule of costs and payments for all the items and the years in which they will be incurred. The second category of costing problems is one of financing or engineering economics. All the costs are first "present valued" to some reference period using rates of return appropriate to the particular situation. One finally arrives at sets of annual costs which can be used as the basis for setting lease costs or revenue requirements and tariffs. The correspondence between methods using discounted rates of return and capital recovery formulae on one hand and those using various depreciation schedules, such as is typical of regulated industries on the other hand, is discussed. The remainder of the paper is devoted to discussing the relationship between critical parameters, such as replacement schedules, design lifetime, satellite power and Earth station antenna size, and the overall costs. It is shown that optima for these parameters may exist and can be calculated. In particular, the optimization of satellite replacement schedules to minimize the present value of total investment over a very long period is presented, along with simplified versions of the theory suitable for system planning. The choice of EIRP is also discussed and a procedure for choosing the value that minimizes the costs is shown.

Pritchard, Wilbur L.

168

Development of an Automated Tracking System of Tagged Wild Animals  

E-print Network

Development of an Automated Tracking System of Tagged Wild Animals Mariya Ishutkina1 Timothy Chan2 and there are about a hundred of them living in the wild. For tracking purposes, each animal is outfitted remaining animals and established a captive-breeding program to restore red wolves in the wild. As pointed

169

A COLOR ANIMATION SYSTEM BASED ON THE MULTIPLANE TECHNIQUE  

E-print Network

animation technique to produce depth and motion illusions. Real-time film previewing, utilizing an onA COLOR ANIMATION SYSTEM BASED ON THE MULTIPLANE TECHNIQUE Marc Levoy Program of Computer Graphics Cornell University Abstract This paper describes an animation package currently under development

Stanford University

170

Walk to here: a voice driven animation system  

Microsoft Academic Search

We present a novel interface for directing the actions of computer animated characters and camera movements. Our system takes spoken input in combination with mouse pointing to generate desired character animation based on motion capture data. The aim is to achieve a more natural animation interfac e by supporting the types of di- alogue and pointing that might be used

Z. Wang; M. Van De Panne

2006-01-01

171

Outlining a Conception of Animal Welfare for Organic Farming Systems  

Microsoft Academic Search

The concept of animal welfare refersto the animal's quality of life. The choice ofdefinition always reflects some basicvaluation. This makes a particular conceptionof welfare value-dependent. Also, the animalhusbandry system reflects certain values oraims. The values reflected in the chosenconception of animal welfare ought tocorrespond to values aimed for in the husbandrysystem. The IFOAM Basic Standards and otherwritings dealing with organic

Vonne Lund; Helena Röcklinsberg

2001-01-01

172

Automobile inspection system based on wireless communication  

NASA Astrophysics Data System (ADS)

This paper aims to research the Automobile Inspection System based on Wireless Communication, and suggests an overall design scheme which uses GPS for speed detection and Bluetooth and GPRS for communication. The communication between PDA and PC was realized by means of GPRS and TCP/IP; and the hardware circuit and software for detection terminal were devised by means of JINOU-3264 Bluetooth Module after analyzing the Bluetooth and its communication protocol. According to the results of debugging test, this system accomplished GPRS based data communication and management as well as the real-time detection on auto safety performance parameters in crash test via PC, whereby the need for mobility and reliability was met and the efficiency and level of detection was improved.

Miao, Changyun; Ye, Chunqing

2010-07-01

173

Systems Theory and Communication. Annotated Bibliography.  

ERIC Educational Resources Information Center

This annotated bibliography presents annotations of 31 books and journal articles dealing with systems theory and its relation to organizational communication, marketing, information theory, and cybernetics. Materials were published between 1963 and 1992 and are listed alphabetically by author. (RS)

Covington, William G., Jr.

174

Acoustical Communications for Wireless Downhole Telemetry Systems  

E-print Network

of acoustic waves over production pipes. The wireless communication system was built using an acoustic transmitter, five connected segments of seven inch production pipes, and an acoustic receiver. The propagation experiments that were conducted...

Farraj, Abdallah

2012-08-22

175

EDUCATIONAL COMMUNICATIONS SYSTEM--PHASE III.  

ERIC Educational Resources Information Center

MULTIPURPOSE COMMUNICATIONS SYSTEM MODELS WERE DEVELOPED FOR APPLICATION TO HIGHER EDUCATION. THREE MODEL SYSTEMS - INTRASTATE, INTERSTATE, AND EDUCATIONAL RESOURCES - WERE DESIGNED. THESE SYSTEM DESIGNS WERE ESTABLISHED FOR EASY EVALUATION AND MAXIMUM FLEXIBILITY, WITH A MINIMUM OF PRESET AUTOMATIC EQUIPMENT. TWO ALTERNATIVE TRANSMISSION SYSTEMS

WITHERSPOON, JOHN P.; AND OTHERS

176

Communication in production animal medicine: modelling a complex interaction with the example of dairy herd health medicine  

PubMed Central

Background The importance of communication skills in veterinary medicine is increasingly recognised. Appropriate communication skills towards the client are of utmost importance in both companion animal practice and production animal field and consultancy work. The need for building a relationship with the client, alongside developing a structure for the consultation is widely recognised and applies to both types of veterinary practice. Results Veterinary advisory practice in production animal medicine is, however, characterised by a more complex communication on different levels. While the person-orientated communication is a permanent process between veterinarian and client with a rather personal perspective and defines the roles of interaction, the problem-orientated communication deals with emerging difficulties; the objective is to solve an acute health problem. The solution - orientated communication is a form of communication in which both veterinarian and client address longstanding situations or problems with the objective to improve herd health and subsequently productivity performance. All three forms of communication overlap. Conclusions Based on this model, it appears useful for a veterinary practice to offer both a curative and an advisory service, but to keep these two separated when deemed appropriate. In veterinary education, the strategies and techniques necessary for solution orientated communication should be included in the teaching of communication skills. PMID:21777495

2011-01-01

177

Towards an interactive high visual complexity animation system  

Microsoft Academic Search

A computer animation system is discussed which employs interactive techniques and presents a unified approach to the graphical display of complex three dimensional data. The system facilitates the generation, manipulation and display of highly detailed data with the aid of interactive devices and a video interface to a standard color TV monitor. The system enables the animator to create a

C. Csuri; R. Hackathorn; R. Parent; W. Carlson; M. Howard

1979-01-01

178

Reactive animation: From piecemeal experimentation to reactive biological systems  

E-print Network

Reactive animation: From piecemeal experimentation to reactive biological systems ODED VAINAS1 approach, termed Reactive Animation (RA) for simulating such complex biological systems. RA is an approach of biological systems, has been a focus point for the biomedical community. We have developed a computational

Harel, David

179

Television animation store: Control system operation and implementation  

NASA Astrophysics Data System (ADS)

Described is the computer control system of the electronic rostrum camera animation system developed to enable picture sequences to be generated directly as television signals, instead of using cine film. The ergonomics of the control system are described, together with some of the more demanding aspects of its implementation, which allow complex animated sequences to be generated and replayed in real time.

Kirby, D. G.

1988-05-01

180

A NETWORK-BASED MANAGEMENT INFORMATION SYSTEM FOR ANIMAL  

E-print Network

A NETWORK-BASED MANAGEMENT INFORMATION SYSTEM FOR ANIMAL HUSBANDRY IN FARMS Jing Han1 , Xi Wang ,*2 of the management information system is studied. The security strategy model of the MIS is proposed: management information system, ASP, animal husbandry information, network technology Currently, the economy

Boyer, Edmond

181

Animation  

NSDL National Science Digital Library

Animation is making a splash with the recent box office hit, Shrek 2. This Topic in Depth explores how animation works, it's history and the entertaining as well as academic applications of animation. The first website provides a basic overview of digital cinema (1). More information on animation can be found on the second website (2). Digital Media FX provides this history (3 ) of animation. The Library of Congress has also put together a nice website (4 ) with some historical artifacts that for demonstrating a "a variety of elements that go into the creative process of developing and interpreting animated motion pictures." The fourth website provides an extensive list of online resources and academic uses for animation such as Chemistry, Evolution, Genetics, and Physics. (5 ). This fifth website posts the winners of the 2004 Character Animation Technologies competition (6 ). And finally, Slashdot has a nice expose on the Mathematics of Futurama (7).

182

Degree project in Communication Systems  

E-print Network

B R A M A N I A N Security as a Service in Cloud for Smartphones KTH Information and Communication Technology #12;Security as a Service in Cloud for Smartphones Master Thesis Lakshmi Subramanian 28th June computers. Cloud computing is a new computing paradigm and a breakthrough technology of recent times. Its

Maguire Jr., Gerald Q.

183

Degree project in Communication Systems  

E-print Network

Technology #12;Spectrum sensing based on specialized microcontroller based white space sensors Measuring these white spaces and thus to reduce the radio spectrum inefficiency. In this thesis, we study spectrum based on specialized microcontroller based white space sensors KTH Information and Communication

Maguire Jr., Gerald Q.

184

Degree project in Communication Systems  

E-print Network

, a conventional discrete event simulator cannot meet with increasing demands of computational or the structural Technology #12;HydraNetSim: a Parallel Discrete Event Simulator Muhammad Fahd Azeemi mfahad@kth.se Master. and Christof Leng School of Information and Communication Technology KTH Royal Institute of Technology

Maguire Jr., Gerald Q.

185

Tags, wireless communication systems, tag communication methods, and wireless communications methods  

DOEpatents

Tags, wireless communication systems, tag communication methods, and wireless communications methods are described. In one aspect, a tag includes a plurality of antennas configured to receive a plurality of first wireless communication signals comprising data from a reader, a plurality of rectifying circuits coupled with. respective individual ones of the antennas and configured to provide rectified signals corresponding to the first wireless communication signals, wherein the rectified signals are combined to produce a composite signal, an adaptive reference circuit configured to vary a reference signal responsive to the composite signal, a comparator coupled with the adaptive reference circuit and the rectifying circuits and configured to compare the composite signal with respect to the reference signal and to output the data responsive to the comparison, and processing circuitry configured to receive the data from the comparator and to process the data.

Scott; Jeff W. (Pasco, WA), Pratt; Richard M. (Richland, WA)

2006-09-12

186

Software-defined Quantum Communication Systems  

SciTech Connect

Quantum communication systems harness modern physics through state-of-the-art optical engineering to provide revolutionary capabilities. An important concern for quantum communication engineering is designing and prototyping these systems to prototype proposed capabilities. We apply the paradigm of software-defined communica- tion for engineering quantum communication systems to facilitate rapid prototyping and prototype comparisons. We detail how to decompose quantum communication terminals into functional layers defining hardware, software, and middleware concerns, and we describe how each layer behaves. Using the super-dense coding protocol as a test case, we describe implementations of both the transmitter and receiver, and we present results from numerical simulations of the behavior. We find that while the theoretical benefits of super dense coding are maintained, there is a classical overhead associated with the full implementation.

Humble, Travis S [ORNL; Sadlier, Ronald J [ORNL

2014-01-01

187

Data analysis using a data base driven graphics animation system  

SciTech Connect

A graphics animation system has been developed at the Idaho National Engineering Laboratory (INEL) to assist engineers in the analysis of large amounts of time series data. Most prior attempts at computer animation of data involve the development of large and expensive problem-specific systems. This paper discusses a generalized interactive computer animation system designed to be used in a wide variety of data analysis applications. By using relational data base storage of graphics and control information, considerable flexibility in design and development of animated displays is achieved.

Schwieder, D.H.; Stewart, H.D.; Curtis, J.N.

1985-01-01

188

Iterative design of video communication systems  

Microsoft Academic Search

This paper reviews the design and implementation of several video telephony systems at Bellcore as a case study in iterative design. In contrast to single user compuer applications, communication systems consists of both the interconnection technology and the people who are interconnected. From a user’s point of view, the capabilities provided by the system, the rules for its use, and

Colleen Cool; Robert S. Fish; Robert E. Kraut; C. M. Lowery

1992-01-01

189

Degree project in Communication Systems  

E-print Network

K U R I Y O a n d M O H A M M A D A B D U L L A Toward a Network Based 3D Printing Service KTH Information and Communication Technology #12;Toward a Network Based3D Printing Service Laurier Ndikuriyo realized and is left as future work. Keywords: 3D-printing, MakerBot Thing-o-Matic, Replicatorg, LAMP, Open

Maguire Jr., Gerald Q.

190

Full-duplex optical communication system  

NASA Technical Reports Server (NTRS)

A method of full-duplex electromagnetic communication wherein a pair of data modulation formats are selected for the forward and return data links respectively such that the forward data electro-magnetic beam serves as a carrier for the return data. A method of encoding optical information is used wherein right-hand and left-hand circular polarizations are assigned to optical information to represent binary states. An application for an earth to low earth orbit optical communications system is presented which implements the full-duplex communication and circular polarization keying modulation format.

Shay, Thomas M. (Inventor); Hazzard, David A. (Inventor); Horan, Stephen (Inventor); Payne, Jason A. (Inventor)

2004-01-01

191

Early Communication System (ECOMM) for ISS  

NASA Technical Reports Server (NTRS)

The International Space Station (ISS) Early Communications System (ECOMM) was a Johnson Space Center (JSC) Avionic Systems Division (ASD) in-house developed communication system to provide early communications between the ISS and the Mission Control Center-Houston (MCC-H). This system allows for low rate commands (link rate of 6 kbps) to be transmitted through the Tracking and Data Relay Satellite System (TDRSS) from MCC-H to the ISS using TDRSS's S-band Single Access Forward (SSA/) link service. This system also allows for low rate telemetry (link rate of 20.48 kbps) to be transmitted from ISS to MCC-H through the TDRSS using TDRSS's S-band Single Access Return (SSAR) link service. In addition this system supports a JSC developed Onboard Communications Adapter (OCA) that allows for a two-way data exchange of 128 kbps between MCC-H and the ISS through TDRSS. This OCA data can be digital video/audio (two-way videoconference), and/or file transfers, and/or "white board". The key components of the system, the data formats used by the system to insure compatibility with the future ISS S-Band System, as well as how other vehicles may be able to use this system for their needs are discussed in this paper.

Gaylor, Kent; Tu, Kwei

1999-01-01

192

Human Factor Aspects of Power System Flow Animation  

Microsoft Academic Search

This paper presents experimental results associated with human factor aspects of using animation to display electric power system flow information, including transmission line megawatt flow and power transfer distribution factor (PTDF) values. The paper's results are based on two experiments performed at the University of Illinois at Urbana-Champaign using electric power system students. The results indicate that animated motion of

Douglas A. Wiegmann; Gavin R. Essenberg; Thomas J. Overbye; Yan Sun

2005-01-01

193

A silicon early visual system as a model animal  

Microsoft Academic Search

Examples that show the transfer of our basic knowledge of brain function into practical electronic models are rare. Here we present a user-friendly silicon model of the early visual system that contributes to animal welfare. The silicon chip emulates the neurons in the visual system by using analog Very Large Scale Integration (aVLSI) circuits. It substitutes for a live animal

Tobi Delbrück; Shih-Chii Liu

2004-01-01

194

RESTRAINING SYSTEM FOR PLETHYSMOGRAPHY IN SMALL ANIMALS  

EPA Science Inventory

A restraining technique for immobilizing awake guinea pigs and rats during physiological measurements is described. The basic device consists of an adjustable acrylic holder that supports the animal in a standing position while restricting movement of the four legs. The holder al...

195

Using Multimedia and Cooperative Learning for Online Teaching of Signal Processing Techniques in Communication Systems  

Microsoft Academic Search

The manuscript describes how the multimedia technology and cooperative learning were used to teach an online course, Signal Processing techniques in Communication Systems (SP\\/CS). Students study online presentations enhanced by multimedia animations and perception quizzes, discuss prob- lems using an asynchronous conferencing system, and complete cooperative laboratory simulations based on Matlab. A locally designed course management system (CMS) provides access

Amir Asif

196

A video data base system for studying animal behavior.  

PubMed

Classification of farm animal behavior is based on oral or written descriptions of the activity in which the animal is engaged. The quantification of animal behavior for research requires that individuals recognize and code the behavior of the animal under study. The classification of these behaviors can be subjective and may differ among observers. Illustrated guides to animal behavior do not convey the motion associated with most behaviors. Video-based guides offer a method of quantifying behaviors with real-time demonstrations of the components that make up a behavior. An animal behavior encyclopedia has been developed to allow searching and viewing of defined (video-recorded) behaviors on the Internet. This video data base is being developed to initiate a system that automatically extracts animal motion information from an input animal activity video clip using a multiobject tracking and reasoning system. Eventually, the extracted information will be analyzed and described using standard animal behavior definitions (the behavior encyclopedia). The intended applications of the behavior encyclopedia and video tracking system are 1) an accessible data base for defining and illustrating behaviors for both research and teaching and 2) to further automate the collection of animal behavior data. PMID:9814900

Morrow-Tesch, J; Dailey, J W; Jiang, H

1998-10-01

197

21 CFR 890.3710 - Powered communication system.  

Code of Federal Regulations, 2014 CFR

...ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3710 Powered communication system. (a) Identification. A powered communication...

2014-04-01

198

ANIMAL CELLS AND SYSTEMS Vol. 13 No. 2 113 Animal Cells and Systems 13: 113-118, 2009  

E-print Network

ANIMAL CELLS AND SYSTEMS Vol. 13 No. 2 113 Animal Cells and Systems 13: 113-118, 2009 Keumsa in cellular migration potential was tested in vitro. At a concentration range below 1,000 µg/ mL, Linteusan blocked, in a dose dependent manner, the migration of cells through Matrigel as well as Boyden chamber

Lee, Won-Ha

199

Differential phase shift keyed communication system  

NASA Technical Reports Server (NTRS)

A communication system using differential phase-shift-keying (DPSK) transmits and receives binary data without requiring timing or phase reference signals. The system encodes and modulates the data at the transmitter, and decodes and demodulates the data at the receiver, without ambiguity as to the data content.

Hopkins, P. M.; Wallingford, W. M. (inventors)

1974-01-01

200

Animator  

ERIC Educational Resources Information Center

Art and animation work is the most significant part of electronic game development, but is also found in television commercials, computer programs, the Internet, comic books, and in just about every visual media imaginable. It is the part of the project that makes an abstract design idea concrete and visible. Animators create the motion of life in…

Tech Directions, 2008

2008-01-01

201

Emerging infectious diseases and animal social systems  

Microsoft Academic Search

Emerging infectious diseases threaten a wide diversity of animals, and important questions remain concerning disease emergence\\u000a in socially structured populations. We developed a spatially explicit simulation model to investigate whether—and under what\\u000a conditions—disease-related mortality can impact rates of pathogen spread in populations of polygynous groups. Specifically,\\u000a we investigated whether pathogen-mediated dispersal (PMD) can occur when females disperse after the resident

Charles L. Nunn; Peter H. Thrall; Kelly Stewart; Alexander H. Harcourt

2008-01-01

202

Communication Simulations for Power System Applications  

SciTech Connect

New smart grid technologies and concepts, such as dynamic pricing, demand response, dynamic state estimation, and wide area monitoring, protection, and control, are expected to require considerable communication resources. As the cost of retrofit can be high, future power grids will require the integration of high-speed, secure connections with legacy communication systems, while still providing adequate system control and security. While considerable work has been performed to create co-simulators for the power domain with load models and market operations, limited work has been performed in integrating communications directly into a power domain solver. The simulation of communication and power systems will become more important as the two systems become more inter-related. This paper will discuss ongoing work at Pacific Northwest National Laboratory to create a flexible, high-speed power and communication system co-simulator for smart grid applications. The framework for the software will be described, including architecture considerations for modular, high performance computing and large-scale scalability (serialization, load balancing, partitioning, cross-platform support, etc.). The current simulator supports the ns-3 (telecommunications) and GridLAB-D (distribution systems) simulators. Ongoing and future work will be described, including planned future expansions for a traditional transmission solver. A test case using the co-simulator, utilizing a transactive demand response system created for the Olympic Peninsula and AEP gridSMART demonstrations, requiring two-way communication between distributed and centralized market devices, will be used to demonstrate the value and intended purpose of the co-simulation environment.

Fuller, Jason C.; Ciraci, Selim; Daily, Jeffrey A.; Fisher, Andrew R.; Hauer, Matthew L.

2013-05-29

203

Communication Efficiency in Multi-agent Systems  

Microsoft Academic Search

ó Despite the growing number of multi-agent software systems, relatively few physical systems have adopted multi-agent systems technology. Agents that interact with a dynamic physical environment have requirements not shared by virtual agents, including the need to transfer information about the world and their interaction with it. The agent communication languages proven successful in software based multi-agent systems incur overheads

Mary Berna-koes; Illah R. Nourbakhsh; Katia P. Sycara

2004-01-01

204

Advanced Communication ESM System (ACES) design considerations  

NASA Astrophysics Data System (ADS)

This note outlines the proposed design and development of the Advanced Communication ESM System (ACES) testbed in the Communication Electronic Warfare (CEW) Section at DREO. The purpose of this testbed is to develop a high Probability of Intercept (POI) ESM system for use against various conventional and exotic HF and VHF communications signals. This work is being carried out in support of the army (D-Sigs-EM2) under Task 041XG. The ACES testbed will use wideband digital receivers and advanced digital signal processors to provide high POI, real-time signal detection and identification, high resolution DF, data fusion, analysis, and C3I functions. The aim is to produce a complete ESM system suitable for field trials in a real signal environment by March 1994.

Elsaesser, Derek; Kozminchuk, Brian

1991-12-01

205

Software-defined quantum communication systems  

NASA Astrophysics Data System (ADS)

Quantum communication (QC) systems harness modern physics through state-of-the-art optical engineering to provide revolutionary capabilities. An important concern for QC engineering is designing and prototyping these systems to evaluate the proposed capabilities. We apply the paradigm of software-defined communication for engineering QC systems to facilitate rapid prototyping and prototype comparisons. We detail how to decompose QC terminals into functional layers defining hardware, software, and middleware concerns, and we describe how each layer behaves. Using the superdense coding protocol as an example, we describe implementations of both the transmitter and receiver, and we present results from numerical simulations of the behavior. We conclude that the software-defined QC provides a robust framework in which to explore the large design space offered by this new regime of communication.

Humble, Travis S.; Sadlier, Ronald J.

2014-08-01

206

Distributed Satellite Communication System Design: First-Order Interactions between System and Network  

E-print Network

Distributed Satellite Communication System Design: First-Order Interactions between System to bankruptcy. The upfront capital required to implement a satellite communications system is staggering and performance of a system. Traditionally, the first step toward designing satellite communication systems

de Weck, Olivier L.

207

A small terminal for satellite communication systems  

NASA Technical Reports Server (NTRS)

A small portable, low-cost satellite communications terminal system incorporating a modulator/demodulator and convolutional-Viterbi coder/decoder is described. Advances in signal processing and error-correction techniques in combination with higher power and higher frequencies aboard satellites allow for more efficient use of the space segment. This makes it possible to design small economical earth stations. The Advanced Communications Technology Satellite (ACTS) was chosen to test the system. ACTS, operating at the Ka band incorporates higher power, higher frequency, frequency and spatial reuse using spot beams and polarization.

Xiong, Fuqin; Wu, Dong; Jin, Min

1994-01-01

208

Evolution of a radio communication relay system  

NASA Astrophysics Data System (ADS)

Providing long-distance non-line-of-sight control for unmanned ground robots has long been recognized as a problem, considering the nature of the required high-bandwidth radio links. In the early 2000s, the DARPA Mobile Autonomous Robot Software (MARS) program funded the Space and Naval Warfare Systems Center (SSC) Pacific to demonstrate a capability for autonomous mobile communication relaying on a number of Pioneer laboratory robots. This effort also resulted in the development of ad hoc networking radios and software that were later leveraged in the development of a more practical and logistically simpler system, the Automatically Deployed Communication Relays (ADCR). Funded by the Joint Ground Robotics Enterprise and internally by SSC Pacific, several generations of ADCR systems introduced increasingly more capable hardware and software for automatic maintenance of communication links through deployment of static relay nodes from mobile robots. This capability was finally tapped in 2010 to fulfill an urgent need from theater. 243 kits of ruggedized, robot-deployable communication relays were produced and sent to Afghanistan to extend the range of EOD and tactical ground robots in 2012. This paper provides a summary of the evolution of the radio relay technology at SSC Pacific, and then focuses on the latest two stages, the Manually-Deployed Communication Relays and the latest effort to automate the deployment of these ruggedized and fielded relay nodes.

Nguyen, Hoa G.; Pezeshkian, Narek; Hart, Abraham; Burmeister, Aaron; Holz, Kevin; Neff, Joseph; Roth, Leif

2013-05-01

209

Communication Theory of Secrecy Systems?  

Microsoft Academic Search

detailed study is made of the many standard types of codes and ciphers, and of the ways of breaking them. We will be more concerned with the general mathematical structure and properties of secrecy systems. The treatment is limited in certain ways. First, there are three general types of secrecy system: (1) concealment systems, including such methods as invisible ink,

C. E. SHANNON

210

ANIMAL DISEASE DIAGNOSES EXPERT SYSTEM BASED ON SVM  

E-print Network

ANIMAL DISEASE DIAGNOSES EXPERT SYSTEM BASED ON SVM Long Wan, Wenxing Bao Department of Computer distribute in remote areas, with relatively poor condition of disease diagnosis. Generally, it is hard to carry out disease diagnosis rapidly and accurately. But the farms can diagnose animal disease quickly

Boyer, Edmond

211

Animations  

NSDL National Science Digital Library

This collection contains animations of a nuclear chain reaction, nuclear fission and nuclear fusion. It also showcases interactive models of the first atomic bombs and simulation of the "Nuclear Winter" effect.

Christopher Griffith

212

WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST  

E-print Network

WIRELESS SENSOR NETWORK BASED CONTROL SYSTEM CONCIDERING COMMUNICATION COST Yutaka Iino* Takeshi for wireless sensor network based control system, minimizing communication energy consumption. Some control, wireless sensor network technology has been developed rapidly, and various applications to control system

213

Vocal Corollary Discharge Communicates Call Duration to Vertebrate Auditory System  

PubMed Central

Corollary discharge is essential to an animal's ability to filter self-generated from external stimuli. This includes acoustic communication, although direct demonstration of a corollary discharge that both conveys a vocal motor signal and informs the auditory system about the physical attributes of a self-generated vocalization has remained elusive for vertebrates. Here, we show the underlying synaptic activity of a neuronal vocal corollary discharge pathway in the hindbrain of a highly vocal species of fish. Neurons carrying the vocal corollary discharge are specifically adapted for the transmission of duration information, a predominant acoustic cue. The results reveal that vertebrates, like some insects, have a robust corollary discharge conveying call duration. Along with evidence for the influence of vocal duration on auditory encoding in mammals, these new findings suggest that linking vocal motor and corollary discharge pathways with pattern generating, call duration neurons is a shared network character across the animal kingdom. PMID:24285884

2013-01-01

214

Introduction Neuroethology abounds with examples of animals' sensory systems  

E-print Network

1814 Introduction Neuroethology abounds with examples of animals' sensory systems shaped by natural and evolution of sensory systems is also intimately tied to the functioning and evolution of motor systems is occurring, there must be rapid co-evolution of the sensory and motor systems for species-specific signals

Hillis, David

215

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

216

Trends in Automotive Communication Systems Nicolas Navet  

E-print Network

Trends in Automotive Communication Systems Nicolas Navet 1 , Françoise Simonot-Lion 2 May 29, 2008 of a large number of automotive networks such as LIN, J1850, CAN, FlexRay, MOST, etc.. This chap- ter rst is given. Next, the current eorts of the automotive industry on middleware technologies which may

Paris-Sud XI, Université de

217

Mobility of a Disaster Recover Communication System  

Microsoft Academic Search

What is the best platform to build a Disaster Management Communication System (DMCS)? There is a need to investigate how to best use a DMCS. The two most important uses of a DMCS for any size disaster, is the need for information and getting relief to those that need it. The DMCS needs to collect information from the people affected

Edward Sobanski; Barbara Nicolai

2011-01-01

218

GSM: Global System for Mobile communications  

E-print Network

GSM: Global System for Mobile communications Marco Moretti Università di Pisa #12;Sommario Introduzione Architettura di rete Tecnologia radio Canali GSM Procedure #12;Introduzione #12;Introduzione GSM è a livello Europeo GSM nasce come open standard architecure (OSA), seguendo il modello di Internet. Non è uno

Abrardo, Andrea

219

The FedSat Communications System  

Microsoft Academic Search

The Australian Cooperative Research Centre for Satellite Systems (CRCSS) was approved in mid 1997 and inaugurated in January 1998. The Centre's first major space mission is to develop an innovative research microsatellite, FedSat, for launch in late 2000 to commemorate the centenary of Australian Federation. Communications experiments between the satellite and the earth segment are to be carried out in

E. S. Seumahu; T. S. Bird; W. G. Cowley; A. J. Parfitt; S. Reisenfeld

220

Animation of the Origin of the Solar System  

NSDL National Science Digital Library

This animation depicts the solar system forming from an immense rotating cloud of gas and dust called the solar nebula and the planets forming by accumulating material within the swirling currents of the cloud.

TERC, Center for Earth and Space Science Education

221

System for synchronizing synthesizers of communication systems  

NASA Technical Reports Server (NTRS)

Frequency synthesizers at first and second stations that communicate with each other via a transmission link having a constant propagation delay time are started and synchronized by transmitting a tone from the first station to the second station via the link. The frequencies derived from the synthesizer at the second station are received at the first station and are combined with the frequencies derived from the synthesizer at the first station to derive a constant beat frequency as the two synthesizers are stepped.

Enriquez, E. A. (inventors); Gookin, R. E.

1979-01-01

222

Compact CT\\/SPECT small-animal imaging system  

Microsoft Academic Search

We have developed a dual-modality CT\\/SPECT imaging system for small-animal imaging applications. The X-ray system comprises a commercially available micro-focus X-ray tube and a CCD-based X-ray camera. X-ray transmission measurements are performed based on cone-beam geometry. Individual projections are acquired by rotating the animal about a vertical axis in front of the CCD detector. A high-resolution CT image is obtained

George A. Kastis; Lars R. Furenlid; Donald W. Wilson; Todd E. Peterson; H. Bradford Barber; Harrison H. Barrett

2004-01-01

223

A new bioreactor system for animal cell culture  

E-print Network

A NEW BIOREACTOR SYSTEM FOR ANIMAL CELL CULTURE A Thesis by PATRICK BERNARD MONAHAN Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August... 1989 Major Subject: Chemical Engineering A NEW BIOREACTOR SYSTEM FOR ANIMAL CELL CULTURE A Thesis by PATRICK BERNARD MONAHAN Approved as to style and content by: le C. Engler (Member) D. Hanson (Member) R. Flumer elt (Head of Department...

Monahan, Patrick Bernard

1989-01-01

224

Wideband heterodyne receiver for laser communication system  

NASA Technical Reports Server (NTRS)

A heterodyne receiver for laser communication is described which includes a front end having a cooled photomixer contained in a hermetically sealed spaced quality housing designed for wide bandwidth transmission. The photomixer is coupled through a wideband preamplifier to the receiver back end which includes a frequency tracking network and demodulating equipment. The receiver is capable of tracking a Doppler frequency shift of 750 MHz, positive or negative, and has an instantaneous intermediate frequency information bandwidth of 400 MHz. The receiver system is also capable of operating over a wide temperature range and is designed to be suitable for use in outer space communication.

Flattau, T.; Lange, R. A.; Mellars, B.; Peyton, J.; Wolczok, J. M. (inventors)

1977-01-01

225

Land-mobile satellite communication system  

NASA Technical Reports Server (NTRS)

A satellite communications system includes an orbiting communications satellite for relaying communications to and from a plurality of ground stations, and a network management center for making connections via the satellite between the ground stations in response to connection requests received via the satellite from the ground stations, the network management center being configured to provide both open-end service and closed-end service. The network management center of one embodiment is configured to provides both types of service according to a predefined channel access protocol that enables the ground stations to request the type of service desired. The channel access protocol may be configured to adaptively allocate channels to open-end service and closed-end service according to changes in the traffic pattern and include a free-access tree algorithm that coordinates collision resolution among the ground stations.

Yan, Tsun-Yee (Inventor); Rafferty, William (Inventor); Dessouky, Khaled I. (Inventor); Wang, Charles C. (Inventor); Cheng, Unjeng (Inventor)

1993-01-01

226

Energy efficiency in wireless communication systems  

DOEpatents

Wireless communication systems and methods utilize one or more remote terminals, one or more base terminals, and a communication channel between the remote terminal(s) and base terminal(s). The remote terminal applies a direct sequence spreading code to a data signal at a spreading factor to provide a direct sequence spread spectrum (DSSS) signal. The DSSS signal is transmitted over the communication channel to the base terminal which can be configured to despread the received DSSS signal by a spreading factor matching the spreading factor utilized to spread the data signal. The remote terminal and base terminal can dynamically vary the matching spreading factors to adjust the data rate based on an estimation of operating quality over time between the remote terminal and base terminal such that the amount of data being transmitted is substantially maximized while providing a specified quality of service.

Caffrey, Michael Paul; Palmer, Joseph McRae

2012-12-11

227

Degree project in Communication Systems  

E-print Network

energy resources are becoming scarcer and therefore more valuable. In conjunction with the population growth over last century, the need for finding new, more efficient, and sustainable methods are designing, building, and evaluating a system for precision agriculture which provides farmers with useful

Maguire Jr., Gerald Q.

228

Emerging mobile and personal communication systems  

Microsoft Academic Search

The market demand for wireless communications has been demonstrated by the rapid growth of different second-generation wireless technologies that are optimized for particular applications and environments. Obvious examples include: digital cellular systems like GSM, ADC, PDC,and DCS1800 for widespread vehicular and pedestrian services, and cordless telecommunication systems based on CT2, DECT, and PHS standards for residential, business, and public cordless

Raj Pandya

1995-01-01

229

Learning communication strategies in multiagent systems  

E-print Network

88]. Most research in Distributed Artificial Inteligence (DAI) and multiagent systems has tried to solve these problems by addresing the communication needs of an agent: what information to send, when, and to whom. Even research..., and neural network techniques are used to adjust the weights of the connections betwen the nodes. This is a fine grain distribution of a problem, and the nodes are so simple that they can not be considered inteligent agents. This type of system also...

Kinney, M.; Tsatsoulis, Costas

1998-07-01

230

CLASSIFICATION OF THE MGR SITE COMMUNICATIONS SYSTEM  

SciTech Connect

The purpose of this analysis is to document the Quality Assurance (QA) classification of the Monitored Geologic Repository (MGR) site communications system structures, systems and components (SSCs) performed by the MGR Safety Assurance Department. This analysis also provides the basis for revision of YMP/90-55Q, Q-List (YMP 1998). The Q-List identifies those MGR SSCs subject to the requirements of DOE/RW-0333P, ''Quality Assurance Requirements and Description'' (QARD) (DOE 1998).

J. Ziegler

1999-08-31

231

Tri-modality small animal imaging system  

SciTech Connect

Our group is developing a scanner that combines x-ray, single gamma, and optical imaging on the same rotating gantry. Two functional modalities (SPECT and optical) are included because they have different strengths and weaknesses in terms of spatial and temporal decay lengths in the context of in vivo imaging, and because of the recent advent of multiple reporter gene constructs. The effect of attenuation by biological tissue on the detected intensity of the emitted signal was measured for both gamma and optical imaging. Attenuation by biological tissue was quantified for both the bioluminescent emission of luciferace and for the emission light of the near infrared fluorophore cyanine 5.5, using a fixed excitation light intensity. Experiments were performed to test the feasibility of using either single gamma or x-ray imaging to make depth-dependent corrections to the measured optical signal. Our results suggest that significant improvements in quantitation of optical emission are possible using straightforward correction techniques based on information from other modalities. Development of an integrated scanner in which data from each modality are obtained with the animal in a common configuration will greatly simplify this process.

Kundu, B.K.; Stolin, A.V.; Pole, J.; Baumgart, L.; Fontaine, M.; Wojcik, R.; Kross, B.; Zorn, C.; Majewski, S.; Williams, M.B.

2006-02-01

232

COMMUNICATION SYSTEMS AND STUDY METHOD FOR ACTIVE DISTRIBUTION POWER SYSTEMS  

E-print Network

to the distribution power system with active renewable energy based generation units is discussed. Subsequently is configured and studied by the OPNET, and the performance of an active distribution power system integrated1 COMMUNICATION SYSTEMS AND STUDY METHOD FOR ACTIVE DISTRIBUTION POWER SYSTEMS Mu Wei, Zhe Chen

Chen, Zhe

233

A conceptual model for particle systems animation  

E-print Network

interface. Other visu- al characteristics of a particle, such as radius, are used by the particle renderer for image generation, 13 Finally, there are parameters which contain information about a particle's life-span, and connectivity to other particles.... The life-span of a particle can be used to remove it from the system using a death constraint. Removing particles which have been in the system for a given amount of time allows memory to be reused for new particles entering the system and causes...

Flaherty, Eric Wayne

1992-01-01

234

Space Launch System Animation - Duration: 70 seconds.  

NASA Video Gallery

NASA is ready to move forward with the development of the Space Launch System -- an advanced heavy-lift launch vehicle that will provide an entirely new national capability for human exploration be...

235

RFID for Cattle Traceability System at Animal Checkpoint  

Microsoft Academic Search

Healthy living style generates the demand for high quality of food. However, traceability system across the supply chain is still facing many challenges from technical perspectives. This paper aims to study the feasibility of traceability system at the government animal checkpoint and how UHF-radio frequency identification (RFID) technology can be deployed for enabling such system. UHF-RFID technical approach faces many

U. Ketprom; C. Mitrpant; P. Makhapun; S. Makwimanloy; S. Laokok

2011-01-01

236

Security alarm communication and display systems development  

SciTech Connect

Sandia National Laboratories has developed a variety of alarm communication and display systems for a broad spectrum of users. This paper will briefly describe the latest systems developed for the Department of Energy (DOE), the Department of Defense (DoD), and the Department of State (DOS) applications. Applications covered will vary from relatively small facilities to large complex sites. Ongoing system developments will also be discussed. The concluding section will summarize the practical, implementable state-of-the-art features available in new systems. 6 figs.

Waddoups, I.G.

1990-01-01

237

Communications and tracking expert systems study  

NASA Technical Reports Server (NTRS)

The original objectives of the study consisted of five broad areas of investigation: criteria and issues for explanation of communication and tracking system anomaly detection, isolation, and recovery; data storage simplification issues for fault detection expert systems; data selection procedures for decision tree pruning and optimization to enhance the abstraction of pertinent information for clear explanation; criteria for establishing levels of explanation suited to needs; and analysis of expert system interaction and modularization. Progress was made in all areas, but to a lesser extent in the criteria for establishing levels of explanation suited to needs. Among the types of expert systems studied were those related to anomaly or fault detection, isolation, and recovery.

Leibfried, T. F.; Feagin, Terry; Overland, David

1987-01-01

238

Acoustic system for communication in pipelines  

DOEpatents

A system for communication in a pipe, or pipeline, or network of pipes containing a fluid. The system includes an encoding and transmitting sub-system connected to the pipe, or pipeline, or network of pipes that transmits a signal in the frequency range of 3-100 kHz into the pipe, or pipeline, or network of pipes containing a fluid, and a receiver and processor sub-system connected to the pipe, or pipeline, or network of pipes containing a fluid that receives said signal and uses said signal for a desired application.

Martin, II, Louis Peter (San Ramon, CA); Cooper, John F. (Oakland, CA)

2008-09-09

239

A passive integrated transponder system for tracking animal movements  

USGS Publications Warehouse

We describe an automated system that uses passive integrated transponder (PIT) tags to track movements of animals past specific locations. The system was designed to operate maintenance free for several months, be secure from vandalism and environmental damage, and record the identity, date, and time of passage of animals past a 2.4-m wide area. We used the system to monitor effectively the movements of 172 desert tortoises (Gopherus agassizii) through 2 storm drain culverts that pass beneath a state highway in the Mojave Desert, California. Four tortoises entered or passed through the culverts on 60 occasions. The system can be easily adapted to other species.

Boarman, W.I.; Beigel, M.L.; Goodlett, G.C.; Sazaki, M.

1999-01-01

240

Communications and control for electric power systems  

NASA Technical Reports Server (NTRS)

The first section of the report describes the AbNET system, a hardware and software communications system designed for distribution automation (it can also find application in substation monitoring and control). The topology of the power system fixes the topology of the communications network, which can therefore be expected to include a larger number of branch points, tap points, and interconnections. These features make this communications network unlike any other. The network operating software has to solve the problem of communicating to all the nodes of a very complex network in as reliable a way as possible even if the network is damaged, and it has to do so with minimum transmission delays and at minimum cost. The design of the operating protocols is described within the framework of the seven-layer Open System Interconnection hierarchy of the International Standards Organization. Section 2 of the report describes the development and testing of a high voltage sensor based on an electro-optic polymer. The theory of operation is reviewed. Bulk fabrication of the polymer is discussed, as well as results of testing of the electro-optic coefficient of the material. Fabrication of a complete prototype sensor suitable for use in the range 1-20 kV is described. The electro-optic polymer is shown to be an important material for fiber optic sensing applications. Appendix A is theoretical support for this work. The third section of the report presents the application of an artificial neural network, Kohonen's self-organizing feature map, for the classification of power system states. This classifier maps vectors of an N-dimensional space to a 2-dimensional neural net in a nonlinear way preserving the topological order of the input vectors. These mappings are studied using a nonlinear power system model.

Kirkham, H.; Goettsche, A.; Niebur, D.; Friend, H.; Johnston, A.

1991-01-01

241

Talk to the Virtual Hands: Self-Animated Avatars Improve Communication in Head-Mounted Display Virtual Environments  

PubMed Central

Background When we talk to one another face-to-face, body gestures accompany our speech. Motion tracking technology enables us to include body gestures in avatar-mediated communication, by mapping one's movements onto one's own 3D avatar in real time, so the avatar is self-animated. We conducted two experiments to investigate (a) whether head-mounted display virtual reality is useful for researching the influence of body gestures in communication; and (b) whether body gestures are used to help in communicating the meaning of a word. Participants worked in pairs and played a communication game, where one person had to describe the meanings of words to the other. Principal Findings In experiment 1, participants used significantly more hand gestures and successfully described significantly more words when nonverbal communication was available to both participants (i.e. both describing and guessing avatars were self-animated, compared with both avatars in a static neutral pose). Participants ‘passed’ (gave up describing) significantly more words when they were talking to a static avatar (no nonverbal feedback available). In experiment 2, participants' performance was significantly worse when they were talking to an avatar with a prerecorded listening animation, compared with an avatar animated by their partners' real movements. In both experiments participants used significantly more hand gestures when they played the game in the real world. Conclusions Taken together, the studies show how (a) virtual reality can be used to systematically study the influence of body gestures; (b) it is important that nonverbal communication is bidirectional (real nonverbal feedback in addition to nonverbal communication from the describing participant); and (c) there are differences in the amount of body gestures that participants use with and without the head-mounted display, and we discuss possible explanations for this and ideas for future investigation. PMID:22022442

Dodds, Trevor J.; Mohler, Betty J.; Bülthoff, Heinrich H.

2011-01-01

242

Parallel processing spacecraft communication system  

NASA Technical Reports Server (NTRS)

An uplink controlling assembly speeds data processing using a special parallel codeblock technique. A correct start sequence initiates processing of a frame. Two possible start sequences can be used; and the one which is used determines whether data polarity is inverted or non-inverted. Processing continues until uncorrectable errors are found. The frame ends by intentionally sending a block with an uncorrectable error. Each of the codeblocks in the frame has a channel ID. Each channel ID can be separately processed in parallel. This obviates the problem of waiting for error correction processing. If that channel number is zero, however, it indicates that the frame of data represents a critical command only. That data is handled in a special way, independent of the software. Otherwise, the processed data further handled using special double buffering techniques to avoid problems from overrun. When overrun does occur, the system takes action to lose only the oldest data.

Bolotin, Gary S. (Inventor); Donaldson, James A. (Inventor); Luong, Huy H. (Inventor); Wood, Steven H. (Inventor)

1998-01-01

243

Integrated communications and optical navigation system  

NASA Astrophysics Data System (ADS)

The Integrated Communications and Optical Navigation System (ICONS) is a flexible navigation system for spacecraft that does not require global positioning system (GPS) measurements. The navigation solution is computed using an Unscented Kalman Filter (UKF) that can accept any combination of range, range-rate, planet chord width, landmark, and angle measurements using any celestial object. Both absolute and relative orbit determination is supported. The UKF employs a full nonlinear dynamical model of the orbit including gravity models and disturbance models. The ICONS package also includes attitude determination algorithms using the UKF algorithm with the Inertial Measurement Unit (IMU). The IMU is used as the dynamical base for the attitude determination algorithms. This makes the sensor a more capable plug-in replacement for a star tracker, thus reducing the integration and test cost of adding this sensor to a spacecraft. Recent additions include an integrated optical communications system which adds communications, and integrated range and range rate measurement and timing. The paper includes test results from trajectories based on the NASA New Horizons spacecraft.

Mueller, J.; Pajer, G.; Paluszek, M.

2013-12-01

244

Trends in Global Nitrous Oxide Emissions from Animal Production Systems  

Microsoft Academic Search

Wastes from animal production systems contribute as much as 30–50% to the global N2O emissions from agriculture, but relatively little attention has been given on improving the accuracy of the estimates and on developing mitigation options. This paper discusses trends and uncertainties in global N2O emission from animal waste and discusses possible mitigation strategies, on the basis of literature data

Oene Oenema; Nicole Wrage; Gerard L. Velthof; Jan Willem van Groenigen; Jan Dolfing; Peter J. Kuikman

2005-01-01

245

Hybrid power system for remote communications stations  

NASA Astrophysics Data System (ADS)

The U.S. Coast Guard is upgrading communications equipment at remote sites in Alaska in support of the Coastal Voice Distress Network. The VHF-FM Search and Rescue sites are powered by a primary power system consisting of a thermoelectric generator. Thermoelectric generators are very inefficient devices which consume vast quantities of propane to create electricity. The upgrade necessitates added power requirements on the power supply system at the remote sites. These requirements compel the redesign and/or upgrade of the power system. If thermoelectric generators continue to be utilized as the primary power system, additional helicopter visits to the sites to deliver propane will be required. These helicopter flights are costly and sometimes hazardous due to severe weather. This thesis investigates a variety of power system options capable of providing electrical power to the communications sites. Specifically, this thesis addresses three objectives. The first is a discussion of current alternative energy source technology available to supply the required power. The second is an analysis of the specific power system requirements and constraints. The third objective and major thrust of the research is the design of a reliable hybrid power system for this application, capable of utilizing the inexhaustible natural energy available at the remote sites. The engineering parameters for a hybrid power system were studied and calculations made based on commercially available components. The difficulties in the design due to extreme weather conditions and unavailability of natural power resource information at specific sites are addressed. This thesis presents the groundwork associated with hybrid power system designs for use at remote communications sites.

Pietras, Christopher R.

1993-09-01

246

Accountable Anonymous Service Usage in Mobile Communication Systems \\Lambda  

E-print Network

Accountable Anonymous Service Usage in Mobile Communication Systems \\Lambda Levente Butty Introduction 1.1 Background Mobile communication systems allow their users to access a large set of traditional to one particular physical location. From a technology perspective, mobile communication systems have

Bencsáth, Boldizsár

247

Power variations of wireless communication systems.  

PubMed

The use of wireless digital communication devices like GSM, WCDMA, HSPA, DECT, and WiFi changes the exposure of electromagnetic waves toward the user. Concentrating on the power variations on a slow and fast time scale, these new systems are discussed. Experimental results for both uplink and downlink are included for a sample of systems. The spectrum of the power fluctuations is seen as a convenient and compact way of describing very complex system behavior. The results are of interest for scientific studies of epidemiology and biological effects, and for general electromagnetic compatibility (EMC) aspects. PMID:20112260

Andersen, J B; Mogensen, P E; Pedersen, G F

2010-05-01

248

Expression Systems and Species Used for Transgenic Animal Bioreactors  

PubMed Central

Transgenic animal bioreactors can produce therapeutic proteins with high value for pharmaceutical use. In this paper, we compared different systems capable of producing therapeutic proteins (bacteria, mammalian cells, transgenic plants, and transgenic animals) and found that transgenic animals were potentially ideal bioreactors for the synthesis of pharmaceutical protein complexes. Compared with other transgenic animal expression systems (egg white, blood, urine, seminal plasma, and silkworm cocoon), the mammary glands of transgenic animals have enormous potential. Compared with other mammalian species (pig, goat, sheep, and cow) that are currently being studied as bioreactors, rabbits offer many advantages: high fertility, easy generation of transgenic founders and offspring, insensitivity to prion diseases, relatively high milk production, and no transmission of severe diseases to humans. Noticeably, for a small- or medium-sized facility, the rabbit system is ideal to produce up to 50?kg of protein per year, considering both economical and hygienic aspects; rabbits are attractive candidates for the mammary-gland-specific expression of recombinant proteins. We also reviewed recombinant proteins that have been produced by targeted expression in the mammary glands of rabbits and discussed the limitations of transgenic animal bioreactors. PMID:23586046

Wang, Yanli; Zhao, Sihai; Bai, Liang; Fan, Jianglin; Liu, Enqi

2013-01-01

249

A smart system for surveillance of animal welfare during transport.  

PubMed

New welfare regulations will impose surveillance systems so that information on the quality of transport conditions is available. Moreover a route description is useful for optimisation of transport logistics, but also in relation to estimating of sanitary risk and food safety, including traceability of individual animals. Therefore a transport surveillance system has been developed which is integrating the following information: individual identification of animals, (un)loading place and time, air quality (temperature, relative humidity, emissions), vibration and behaviour of the animals. These data are collected by telemetry and GPS, and are transmitted to a dispatch centre by GSM. Hence, information is available on-line and on disk, so that the driver can be informed and corrected at the spot. Dynamic route optimization of cattle collection from farms and logistical activities of abattoirs are considered in relation to animal welfare. Another instrumentation package that comprises sensors of heart rate and vibration on the animal has been integrated. These sensors can be mounted on animals and the data is transferred to a database through a wireless network. Comprehensive field measurement has been made to evaluate the system and found that the package performs well. Hence, advice will be generated for vehicle manufacturers, hauliers, farmers, slaughterhouses and retailers. PMID:14746056

Gebresenbet, G; Wikner, I; Van de Water, G; Freson, L; Geers, R

2003-12-01

250

Note on antenna design in UWB wireless communication systems  

Microsoft Academic Search

Requirements for the antennas in wireless communication systems are presented, from a systems point of view. Differences between narrowband and ultrawideband systems in assessing system performance are discussed. Several parameters are introduced for the antennas in ultra-wideband wireless communication systems, to evaluate the performance of antennas based on the system requirements. As an example, a transmitting\\/receiving antenna system comprising two

Xuan Hui Wu; Zhi Ning Chen; M. Y. W. Chia

2003-01-01

251

Gas Main Sensor and Communications Network System  

Microsoft Academic Search

Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the Northeast Gas Association (NGA), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. This projected was completed in April 2006, and culminated in the installation of more than 2 dozen GasNet nodes in both low- and

Hagen Schempf

2006-01-01

252

Issues in satellite personal communication systems  

Microsoft Academic Search

In the paper various issues in personal satellite communications are addressed. Basic geostationary and non?geostationary\\u000a satellite constellations are considered. The narrowband and wideband characterization of the mobile satellite channel and\\u000a related system implications are discussed. Satellite diversity is presented as a measure to overcome signal shadowing. The\\u000a capacity of TDMA and CDMA multiple access is estimated, taking into account co?channel

Erich Lutz

1998-01-01

253

The interactive evolution of human communication systems.  

PubMed

This paper compares two explanations of the process by which human communication systems evolve: iterated learning and social collaboration. It then reports an experiment testing the social collaboration account. Participants engaged in a graphical communication task either as a member of a community, where they interacted with seven different partners drawn from the same pool, or as a member of an isolated pair, where they interacted with the same partner across the same number of games. Participants' horizontal, pair-wise interactions led "bottom up" to the creation of an effective and efficient shared sign system in the community condition. Furthermore, the community-evolved sign systems were as effective and efficient as the local sign systems developed by isolated pairs. Finally, and as predicted by a social collaboration account, and not by an iterated learning account, interaction was critical to the creation of shared sign systems, with different isolated pairs establishing different local sign systems and different communities establishing different global sign systems. PMID:21564217

Fay, Nicolas; Garrod, Simon; Roberts, Leo; Swoboda, Nik

2010-04-01

254

Integrated Energy and Communications System Architecture  

NSDL National Science Digital Library

A consortium of the Electricity Innovation Institute is developing an "an open, standards-based systems architecture for the data communications and distributed computing infrastructure that will enable the integration of a wide variety of intelligent electric power system components." Citing the overloaded U.S. power grid and changing trends in electricity demand, the consortium is advocating new technologies such as a self-healing grid and advanced monitoring capabilities. This Web site outlines the scope of the project and the motivation for conducting the work. Additionally, a white paper is provided that discusses the finer technical and implementation details of the proposed changes.

255

Multi-frequency communication system and method  

DOEpatents

A multi-frequency RFID remote communication system is provided that includes a plurality of RFID tags configured to receive a first signal and to return a second signal, the second signal having a first frequency component and a second frequency component, the second frequency component including data unique to each remote RFID tag. The system further includes a reader configured to transmit an interrogation signal and to receive remote signals from the tags. A first signal processor, preferably a mixer, removes an intermediate frequency component from the received signal, and a second processor, preferably a second mixer, analyzes the IF frequency component to output data that is unique to each remote tag.

Carrender, Curtis Lee; Gilbert, Ronald W.

2004-06-01

256

Animating an interactive conversational character for an educational game system  

Microsoft Academic Search

Within the framework of the project NICE (Natural Interactive Communication for Edutainment) [2], we have been developing an educational and entertaining computer game that allows children and teenagers to interact with a conversational character impersonating the fairy tale writer H.C. Andersen (HCA). The rationale behind our system is to make kids learn about HCA's life, fairy tales and historical period

Andrea Corradini; Manish Mehta; Niels-Ole Bernsen; Marcela Charfuelan

2005-01-01

257

Emergency Communication for Electric Power System Based on Airship  

Microsoft Academic Search

The problems facing the communication for electric power system safety were recently highlighted by ice disaster in southern China and Wenchuan earthquake. The existing communication systems in the Yunnan power grid are far from adequate. Terrestrial networks are disabled by serious natural disaster. Satellite communication network is deficient in bandwidth, and has high propagation delay, which cannot satisfy the demand

Ming Huang; Jiang Yu; Jinsong Hu; Ling Zhao; Rong Zong

2009-01-01

258

Dynamic communication models in embedded system co-simulation  

Microsoft Academic Search

Many co-simulation techniques either suffer from poor performancewhen simulating communications intensive systems, or theyrepresent communications with a uniformly low level of detail.This paper presents a technique which allows communication tobe represented at multiple levels of detail and which gives a designerthe ability to dynamically choose the appropriate level fordifferent parts of the system. This paper also presents a tool whichuses

Ken Hines; Gaetano Borriello

1997-01-01

259

Open MultiAgent Systems: Agent Communication and Integration  

E-print Network

have been proposed that facilitate the communication process in a multi­agent system. These agentsOpen Multi­Agent Systems: Agent Communication and Integration Rogier M. van Eijk, Frank S. de Boer is on the issues of agent communication and integration. We define an abstract programming lan­ guage for open

Utrecht, Universiteit

260

Communicating Research to Small Drinking Water Systems: Dissemination by Researchers  

EPA Science Inventory

This talk discusses the challenges of disseminating research relevant to small systems. The presentation discusses efforts by the U.S. EPA’s Office of Research and Development to effectively communicating drinking water information. In particular, communication approaches ...

261

ISS Update: High Rate Communications System - Duration: 9:26.  

NASA Video Gallery

ISS Update Commentator Pat Ryan interviews Diego Serna, Communications and Tracking Officer, about the High Rate Communications System. Questions? Ask us on Twitter @NASA_Johnson and include the ha...

262

Risk communication strategy development using the aerospace systems engineering process  

NASA Technical Reports Server (NTRS)

This paper explains the goals and challenges of NASA's risk communication efforts and how the Aerospace Systems Engineering Process (ASEP) was used to map the risk communication strategy used at the Jet Propulsion Laboratory to achieve these goals.

Dawson, S.; Sklar, M.

2004-01-01

263

Crew/computer communications study. Volume 1: Final report. [onboard computerized communications system for spacecrews  

NASA Technical Reports Server (NTRS)

Techniques, methods, and system requirements are reported for an onboard computerized communications system that provides on-line computing capability during manned space exploration. Communications between man and computer take place by sequential execution of each discrete step of a procedure, by interactive progression through a tree-type structure to initiate tasks or by interactive optimization of a task requiring man to furnish a set of parameters. Effective communication between astronaut and computer utilizes structured vocabulary techniques and a word recognition system.

Johannes, J. D.

1974-01-01

264

Wavelength selection for optical wireless communications systems  

NASA Astrophysics Data System (ADS)

Eye safety, link performance, and technology infrastructure issues related to Optical Wireless (OW), also known as Free Space Optics (FSO), communication systems are examined relative to wavelength dependence. It is found that 1550 nm systems have compelling advantages over 800nm systems in the areas of laser eye safety, reduced solar background radiation, and existing technology infrastructure. 1550nm has somewhat better receiver sensitivity for PIN detectors, while 800nm has somewhat better sensitivity for APDs. Overall, the factor of 50 greater eye-safe laser power at 1550 nm provides up to 17 dB additional margin for higher data rates or penetrating fog at longer ranges. The availability of high power, low cost semiconductor lasers at 1550 nm allows these advantages to be exploited in commercially available systems.

Rockwell, David A.; Mecherle, G. Stephen

2001-11-01

265

Training Sessions Provide Working Knowledge of National Animal Identification System  

ERIC Educational Resources Information Center

One in-service and two train-the-trainer workshops were conducted by University of Idaho Extension faculty, Idaho State Department of Agriculture personnel, and allied industry representatives to increase Extension educators' knowledge and awareness of the National Animal Identification System (NAIS) and related topics. Training sessions included…

Glaze, J. Benton, Jr.; Ahola, Jason K.

2010-01-01

266

Small Animal PET: A Review of Commercially Available Imaging Systems  

Microsoft Academic Search

More than ten years ago, several research groups started to develop Positron Emission Tomography (PET) systems dedicated to animal studies. The growing interest in pre-clinical imaging studies, both in biological and medical basic research, and in pharmaceutica l industry, has recently induced the world-leading manufacturers of medical image equipment to invest in this market. Some of the proposed scanner prototypes

Michele Larobina; Arturo Brunetti; Marco Salvatore

2006-01-01

267

DESIGN PARAMETERS FOR ANIMAL WASTE TREATMENT SYSTEMS - NITROGEN CONTROL  

EPA Science Inventory

The objectives of this study were to: (a) Develop design criteria for nitrogen and odor control in animal waste stabilization systems; (b) demonstrate the feasibility of nitrogen control using the oxidation ditch; (c) determine the rate, form, and time of manure application permi...

268

Globular dynamics: A connected particle system for animating viscous fluids  

Microsoft Academic Search

Connected particle systems can depict many objects difficult to model in any other fashion. We present a method for animating viscous fluids by simulating the forces of such particles interacting with each other. This method allows for collision detection between the particles and obstacles, both stationary and mobile, and it allows solid objects to break and melt. An approximate method

Gavin S. P. Miller; Andrew Pearce

1989-01-01

269

A Simple Fiber-Optic Communications System  

NSDL National Science Digital Library

In this video adapted from the ICT Center, students will "learn how rise-time analysis is performed to determine the maximum data range of a fiber optic communications system." The video also demonstrates how a transmitter, fiber, and receiver work together. The material is intended for students in grades 11-12. Running time for the video is 5:31.The lesson is accompanied by discussion questions, teaching tips and state educational standards. Users who sign up for a free account can save the resource and download the video as well.

270

Antenna technology for advanced mobile communication systems  

NASA Technical Reports Server (NTRS)

The onboard antenna front end is the key subsystem conditioning configuration and performance of mobile communication satellites. The objectives of this paper are to demonstrate this key role and to review L-band satellite antenna technology for earth coverage and regional applications. Multibeam arrays are first discussed, then unfurlable and inflatable reflector antennas are described. These technologies are now qualified in Europe for future mobile systems, for which the optimum choice of antenna technology has been found to be the key to efficient use of spectrum and power resources.

Rammos, Emmanuel; Roederer, Antoine; Rogard, Roger

1988-01-01

271

Synchronization of APIIS based farm animal biodiversity systems  

PubMed Central

One of the major problems in the management of farm animal and biodiversity information is the exchange of data and keeping it up-to-date, an issue that is very common with distributed information systems consisting of number of databases. This article describes the synchronization protocol developed in APIIS (adaptable platform independent information system) framework and reviews the basic considerations required when building distributed information system that has to exchange information in a network of APIIS based systems. The protocol is designed to synchronize a common part of different database structures. It is developed without any intended use of proprietary database engine and can work with a variety of RDBMS (relational database management system). The main targets of the protocol are animal biodiversity information systems without permanently connected nodes. The EFABIS (European farm animal biodiversity information system) is reviewed as an example of the implementation. Availability The synchronization protocol is integrated as a part of the APIIS framework, which is freely available from the authors. PMID:17597877

Duchev, Zhivko; Groeneveld, Eildert

2006-01-01

272

GAS MAIN SENSOR AND COMMUNICATIONS NETWORK SYSTEM  

SciTech Connect

Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the New York Gas Group (NYGAS), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. A prototype system was built for low-pressure cast-iron mains and tested in a spider- and serial-network configuration in a live network in Long Island with the support of Keyspan Energy, Inc. The prototype unit combined sensors capable of monitoring pressure, flow, humidity, temperature and vibration, which were sampled and combined in data-packages in an in-pipe master-slave architecture to collect data from a distributed spider-arrangement, and in a master-repeater-slave configuration in serial or ladder-network arrangements. It was found that the system was capable of performing all data-sampling and collection as expected, yielding interesting results as to flow-dynamics and vibration-detection. Wireless in-pipe communications were shown to be feasible and valuable data was collected in order to determine how to improve on range and data-quality in the future.

Hagen Schempf, Ph.D.

2003-02-27

273

Laser Communication Demonstration System (LSCS) and Future Mobile Satellite Services  

NASA Technical Reports Server (NTRS)

The Laser Communications Demonstration System (LCDS) is a proposed in-orbit demonstration of high data rate laser communications technology conceived jointly by NASA and U.S. industry. The program objectives are to stimulate industry development and to demonstrate the readiness of high data rate optical communications in Earth Orbit. For future global satellite communication systems using intersatellite links (ISLs), laser communications technology can offer reduced mass , reduced power requirements, and increased channel bandwidths without regulatory restraint. This paper provides comparisons with radio systems and status of the program.

Chen, C. -C.; Lesh, J. R.

1995-01-01

274

The ERTS wideband image communication system.  

NASA Technical Reports Server (NTRS)

The ERTS payload includes a three camera return beam vidicon (RBV) television system and a four channel multispectral scanner system (MSS). The communications system described includes spacecraft wideband equipment plus unique payload processing equipment located at three NASA tracking stations. The RBV information, transmitted as analog FM with a baseband response of dc to 3.2 MHz, is telemetered, processed and recorded on a wideband video recorder. The MSS data, consisting of 24 analog sensor outputs, is digitized and encoded as 15 megabit per second PCM. The MSS data is then transmitted as analog FM, demultiplexed, and recorded on a 25 channel recorder. It is shown that bit error rate is an excellent indicator of MSS link performance while signal-to-noise ratio and distortion vs frequency adequately define RBV link performance.

Pandelides, J.; Popowski, W. J.; Vanvleet, R. N.

1972-01-01

275

Random digital encryption secure communication system  

NASA Technical Reports Server (NTRS)

The design of a secure communication system is described. A product code, formed from two pseudorandom sequences of digital bits, is used to encipher or scramble data prior to transmission. The two pseudorandom sequences are periodically changed at intervals before they have had time to repeat. One of the two sequences is transmitted continuously with the scrambled data for synchronization. In the receiver portion of the system, the incoming signal is compared with one of two locally generated pseudorandom sequences until correspondence between the sequences is obtained. At this time, the two locally generated sequences are formed into a product code which deciphers the data from the incoming signal. Provision is made to ensure synchronization of the transmitting and receiving portions of the system.

Doland, G. D. (inventor)

1982-01-01

276

ECS - The European Communication Satellite system  

NASA Astrophysics Data System (ADS)

The evolution of the European Communication Satellite system (ECS) is traced from feasibility studies in 1970 to the development and launch in 1978 of the Orbital Test Satellite (OTS) by the European Space Agency to prove the new satellite and radio transmission technology being used on ECS. This was followed by the establishment of 'Interim EUTELSAT' in 1979 as the organization to operate ECS. The satellite, which operates at 11/14 GHz, covers all the capitals in Europe via three spot beam antennas, supplemented by a 'Eurobeam' regional coverage antenna which extends the range to cover all of Europe and the Mediterranean basin. Telephony channels are transmitted digitally using time division multiple access (TDMA) with digital speech interpolation (DSI) to optimize satellite capacity. Television transmission is by analog FM over the Eurobeam antenna to North African as well as European capitals. System implications of TDMA operation are discussed, and the EUTELSAT policy for Special Services or satellite business systems is discussed.

Wooster, C. B.

1981-09-01

277

Animated phase portraits of nonlinear and chaotic dynamical systems  

E-print Network

The aim of this section is to present programs allowing to high- light the slow-fast evolution of the solutions of nonlinear and chaotic dynamical systems such as: Van der Pol, Chua and Lorenz models. These programs provide animated phase portraits in dimension two and three, i.e. integration step by step" which are useful tools enabling to understand the dynamic of such systems.

Jean-Marc Ginoux

2014-08-17

278

GAS MAIN SENSOR AND COMMUNICATIONS NETWORK SYSTEM  

SciTech Connect

Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the New York Gas Group (NYGAS), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. In Phase II of this three-phase program, an improved prototype system was built for low-pressure cast-iron and high-pressure steel (including a no-blow installation system) mains and tested in a serial-network configuration in a live network in Long Island with the support of Keyspan Energy, Inc. The experiment was carried out in several open-hole excavations over a multi-day period. The prototype units (3 total) combined sensors capable of monitoring pressure, flow, humidity, temperature and vibration, which were sampled and combined in data-packages in an in-pipe master-repeater-slave configuration in serial or ladder-network arrangements. It was verified that the system was capable of performing all data-sampling, data-storage and collection as expected, yielding interesting results as to flow-dynamics and vibration-detection. Wireless in-pipe communications were shown to be feasible and the system was demonstrated to run off in-ground battery- and above-ground solar power. The remote datalogger access and storage-card features were demonstrated and used to log and post-process system data. Real-time data-display on an updated Phase-I GUI was used for in-field demonstration and troubleshooting.

Hagen Schempf

2004-09-30

279

Human Communication, Semiotics, and General Systems: Personal and Social Communication.  

ERIC Educational Resources Information Center

Questions as to the nature of sign and symbol processes and the functions and behavioral consequences of human significant phenomena are of central concern in semiotics and communication. These matters continue to be of critical importance and are still largely unresolved. Scholars in both areas of inquiry have sought unification of scientific…

Ruben, Brent D.

280

Communication System for Controlling Smart Appliances using Power Line Communication  

Microsoft Academic Search

Microcontroller-based master and slave units are designed with serial ports for communication with a computer and a transmission port to couple the signal to modems at both ends. The programming of the microcontrollers at either end for formatting the data bits before they are sent down the power line and the development of software for putting in place the required

Sheroz Khan; Rafiqul Islam; O. O. Khalifa; J. Omar; A. Hassan; I. Adam

2006-01-01

281

Food for thought: food systems, livestock futures and animal health.  

PubMed

Global food security, livestock production and animal health are inextricably bound. However, our focus on the future tends to disaggregate food and health into largely separate domains. Indeed, much foresight work is either food systems or health-based with little overlap in terms of predictions or narratives. Work on animal health is no exception. Part of the problem is the fundamental misunderstanding of the role, nature and impact of the modern futures tool kit. Here, I outline three key issues in futures research ranging from methodological confusion over the application of scenarios to the failure to effectively integrate multiple methodologies to the gap between the need for more evidence and power and control over futures processes. At its core, however, a better understanding of the narrative and worldview framing much of the futures work in animal health is required to enhance the value and impact of such exercises. PMID:23988197

Wilkinson, Angela

2013-12-01

282

A digital transmission system for global maritime satellite communications  

Microsoft Academic Search

A digital transmission system for global maritime satellite communications has been designed, and experimental communications equipment has been developed, taking account of its potential application to the Inmarsat system where analog modulation is currently used for telephone signal transmission. This paper discusses possible digital technologies to realize an efficient digital transmission system, and presents a concept for the designed system.

Y. Hirata; Y. Yasuda; H. Okinaka; K. Kashiki

1984-01-01

283

Application of the Iridium Satellite System to Aeronautical Communications  

NASA Technical Reports Server (NTRS)

The next generation air transportation system will require greater air-ground communications capacity to accommodate more air traffic with increased safety and efficiency. Communications will remain primarily terrestrially based, but satellite communications will have an increased role. Inmarsat s aeronautical services have been approved and are in use for aeronautical safety communications provided by geostationary satellites. More recently the approval process for the Iridium low earth orbit constellation is nearing completion. The current Iridium system will be able to provide basic air traffic services communications suitable for oceanic, remote and polar regions. The planned second generation of the Iridium system, called Iridium NEXT, will provide enhanced capabilities and enable a greater role in the future of aeronautical communications. This paper will review the potential role of satellite communications in the future of air transportation, the Iridium approval process and relevant system testing, and the potential role of Iridium NEXT.

Kerczewski, Robert J.; Meza, Mike; Gupta, Om

2008-01-01

284

Communications technology guidelines for EMS\\/SCADA systems  

Microsoft Academic Search

The purpose of this Guideline Technical Paper is to provide a summary of the different communications technologies available for use or application with EMS\\/SCADA system projects. All of the various communication media are addressed with a brief description along with tables of the advantages and disadvantages of each and recommendations for choosing the most appropriate communication technology. The technologies discussed

Donald J. Marihart

2001-01-01

285

Shared Communications: Volume 2. In-Depth Systems Research  

SciTech Connect

This report is the second of two documents that examine the literature for actual examples of organizations and agencies that share communications resources. While the primary emphasis is on rural, intelligent transportation system (ITS) communications involving transit, examples will not be limited to rural activities, nor to ITS implementation, nor even to transit. In addition, the term ''communication'' will be broadly applied to include all information resources. The first document of this series, ''Shared Communications: Volume I. A Summary and Literature Review'', defines the meaning of the term ''shared communication resources'' and provides many examples of agencies that share resources. This document, ''Shared Communications: Volume II. In-Depth Systems Research'', reviews attributes that contributed to successful applications of the sharing communication resources concept. A few examples of each type of communication sharing are provided. Based on the issues and best practice realworld examples, recommendations for potential usage and recommended approaches for field operational tests are provided.

Truett, LF

2004-09-22

286

Ultrasonic speech translator and communications system  

DOEpatents

A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original audio signal. The ultrasonic speech translator and communication system (20) includes an ultrasonic transmitting device (100) and an ultrasonic receiving device (200). The ultrasonic transmitting device (100) accepts as input (115) an audio signal such as human voice input from a microphone (114) or tape deck. The ultrasonic transmitting device (100) frequency modulates an ultrasonic carrier signal with the audio signal producing a frequency modulated ultrasonic carrier signal, which is transmitted via acoustical pressure waves across a carrier medium such as gases, liquids or solids. The ultrasonic receiving device (200) converts the frequency modulated ultrasonic acoustical pressure waves to a frequency modulated electronic signal, demodulates the audio signal from the ultrasonic carrier signal, and conditions the demodulated audio signal to reproduce the original audio signal at its output (250).

Akerman, M. Alfred (Knoxville, TN); Ayers, Curtis W. (Clinton, TN); Haynes, Howard D. (Knoxville, TN)

1996-01-01

287

Ultrasonic speech translator and communications system  

DOEpatents

A wireless communication system undetectable by radio frequency methods for converting audio signals, including human voice, to electronic signals in the ultrasonic frequency range, transmitting the ultrasonic signal by way of acoustical pressure waves across a carrier medium, including gases, liquids, or solids, and reconverting the ultrasonic acoustical pressure waves back to the original audio signal. The ultrasonic speech translator and communication system includes an ultrasonic transmitting device and an ultrasonic receiving device. The ultrasonic transmitting device accepts as input an audio signal such as human voice input from a microphone or tape deck. The ultrasonic transmitting device frequency modulates an ultrasonic carrier signal with the audio signal producing a frequency modulated ultrasonic carrier signal, which is transmitted via acoustical pressure waves across a carrier medium such as gases, liquids or solids. The ultrasonic receiving device converts the frequency modulated ultrasonic acoustical pressure waves to a frequency modulated electronic signal, demodulates the audio signal from the ultrasonic carrier signal, and conditions the demodulated audio signal to reproduce the original audio signal at its output. 7 figs.

Akerman, M.A.; Ayers, C.W.; Haynes, H.D.

1996-07-23

288

Using Sequence Diagrams to Detect Communication Problems Between Systems  

NASA Technical Reports Server (NTRS)

Many software systems are evolving complex system of systems (SoS) for which inter-system communication is both mission-critical and error-prone. Such communication problems ideally would be detected before deployment. In a NASA-supported Software Assurance Research Program (SARP) project, we are researching a new approach addressing such problems. In this paper, we show that problems in the communication between two systems can be detected by using sequence diagrams to model the planned communication and by comparing the planned sequence to the actual sequence. We identify different kinds of problems that can be addressed by modeling the planned sequence using different level of abstractions.

Lindvall, Mikael; Ackermann, Chris; Stratton, William C.; Sibol, Deane E.; Ray, Arnab; Yonkwa, Lyly; Kresser, Jan; Godfrey, Sally H.; Knodel, Jens

2008-01-01

289

Attacks on Inter Vehicle Communication Systems - an Analysis  

Microsoft Academic Search

Abstract—Inter-vehicle communication,systems are a new paradigm,of networking.,Largely related to mobile,ad hoc networks and their distributed, self-organizing structure, they also introduce,new,threats. In order,to assess these threats we introduce,a model,of attacks on an inter-vehicle communication,system in this paper. This model,is used to re- fine the system model of the NoW communication,system and to find potential weaknesses,during,the specification phase of the NoW communication,system.

Amer Aijaz; Bernd Bochow; Andreas Festag; Matthias Gerlach; Rainer Kroh

290

A silicon early visual system as a model animal.  

PubMed

Examples that show the transfer of our basic knowledge of brain function into practical electronic models are rare. Here we present a user-friendly silicon model of the early visual system that contributes to animal welfare. The silicon chip emulates the neurons in the visual system by using analog Very Large Scale Integration (aVLSI) circuits. It substitutes for a live animal in experiment design and lecture demonstrations. The neurons on this chip display properties that are central to biological vision: receptive fields, spike coding, adaptation, band-pass filtering, and complementary signaling. Unlike previous laboratory devices whose complexity was limited by the use of discrete components on printed circuit boards, this battery-powered chip is a self-contained patch of the visual system. The realistic responses of the chip's cells and the self-contained adjustment-free correct operation of the chip suggest the possibility of implementation of similar circuits for visual prosthetics. PMID:15149839

Delbrück, Tobi; Liu, Shih-Chii

2004-01-01

291

A real-time photoacoustic tomography system for small animals  

PubMed Central

A real-time 512-element photoacoustic tomography system for small animal imaging using a ring ultrasound array has been developed. The system, based upon a 5 MHz transducer array formed along a 50 mm circular aperture, achieves sub-200 micron lateral resolution over a 2 cm disk-shaped region. Corresponding elevation resolutions of 0.6 to 2.5 mm over the central volume enable depth-resolved 3D tomographic imaging with linear translation. Using 8:1 electronic multiplexing, imaging at up to 8 frame/sec is demonstrated for both dynamic phantoms and in vivo mouse and brain samples. The real-time, full 2D tomographic capability of the system paves the way for functional photoacoustic tomographic imaging studies in small animals with sub-second time frame. PMID:19550444

Gamelin, John; Maurudis, Anastasios; Aguirre, Andres; Huang, Fei; Guo, Puyun; Wang, Lihong V.; Zhu, Quing

2009-01-01

292

A Shuttle based laser system for space communication  

NASA Technical Reports Server (NTRS)

A key element of NASA-Goddard's plan for future laser space communications is the Space Shuttle-based Laser Technology Experiments Facility (LTEF), which will be designed to communicate with a cooperative laser system under development for the Advanced Communication Technology Satellite (ACTS) and will conduct a comprehensive set of acquisition, tracking, and communication experiments. Attention is presently given to the challenges faced by designers in achieving LTEF acquisition of the ACTS downlink beacon laser.

Fitzmaurice, Michael W.; Bruno, Ronald C.

1988-01-01

293

SAW based systems for mobile communications satellites  

NASA Technical Reports Server (NTRS)

Modern mobile communications satellites, such as INMARSAT 3, EMS, and ARTEMIS, use advanced onboard processing to make efficient use of the available L-band spectrum. In all of these cases, high performance surface acoustic wave (SAW) devices are used. SAW filters can provide high selectivity (100-200 kHz transition widths), combined with flat amplitude and linear phase characteristics; their simple construction and radiation hardness also makes them especially suitable for space applications. An overview of the architectures used in the above systems, describing the technologies employed, and the use of bandwidth switchable SAW filtering (BSSF) is given. The tradeoffs to be considered when specifying a SAW based system are analyzed, using both theoretical and experimental data. Empirical rules for estimating SAW filter performance are given. Achievable performance is illustrated using data from the INMARSAT 3 engineering model (EM) processors.

Peach, R. C.; Miller, N.; Lee, M.

1993-01-01

294

Fast massive preventive security and information communication systems  

Microsoft Academic Search

We present a fast massive information communication system for data collection from distributive sources such as cell phone users. As a very important application one can mention preventive notification systems when timely notification and evidence communication may help to improve safety and security through wide public involvement by ensuring easy-to-access and easy-to-communicate information systems. The technology significantly simplifies the response

David Akopian; Philip Chen; Susheel Miryakar; Abhinav Kumar

2008-01-01

295

NASA Workshop on Animal Gravity-Sensing Systems  

NASA Technical Reports Server (NTRS)

The opportunity for space flight has brought about the need for well-planned research programs that recognize the significance of space flight as a scientific research tool for advancing knowledge of life on Earth, and that utilize each flight opportunity to its fullest. For the first time in history, gravity can be almost completely eliminated. Thus, studies can be undertaken that will help to elucidate the importance of gravity to the normal functioning of living organisms, and to determine the effects microgravity may have on an organism. This workshop was convened to organize a plan for space research on animal gravity-sensing systems and the role that gravity plays in the development and normal functioning of these systems. Scientists working in the field of animal gravity-sensing systems use a wide variety of organisms in their research. The workshop presentations dealt with topics which ranged from the indirect gravity receptor of the water flea, Daphnia (whose antennal setae apparently act as current-sensing receptors as the animal moves up and down in water), through specialized statocyst structures found in jellyfish and gastropods, to the more complex vestibular systems that are characteristic of amphibians, avians, and mammals.

Corcoran, M. L. (editor)

1986-01-01

296

OBJECT RECOGNITION IN THE ANIMATION SYSTEM Peter L. Stanchev, Boyan Dimitrov, Vladimir Rykov  

E-print Network

OBJECT RECOGNITION IN THE ANIMATION SYSTEM Peter L. Stanchev, Boyan Dimitrov, Vladimir Rykov This work is devoted to analyzing the syntax contents of an animation. In the paper we present the ANIMATION system ­ a system for animation scene and contents creation, retrieval and display. The object

Stanchev, Peter

297

Tone-activated, remote, alert communication system  

NASA Technical Reports Server (NTRS)

Pocket sized transmitter, frequency modulated by crystal derived tones, with integral loop antenna provides police with easy operating alert signal communicator which uses patrol car radio to relay signal. Communication channels are time shared by several patrol units.

Baker, C. D.; Couvillon, L. A.; Hubbard, W. P.; Kollar, F. J.; Postal, R. B.; Tegnelia, C. R.

1971-01-01

298

A platform for ultra wideband communication systems  

E-print Network

In this thesis, a web interface for sending and receiving data across an actual UWB channel was designed. In addition, a platform for Ultra Wideband (UWB) communication development was implemented. The UWB communication ...

Ackerman, Nathan (Nathan Joseph)

2005-01-01

299

21 CFR 890.3700 - Nonpowered communication system.  

Code of Federal Regulations, 2012 CFR

...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3700 Nonpowered communication system. (a) Identification....

2012-04-01

300

21 CFR 890.3710 - Powered communication system.  

Code of Federal Regulations, 2011 CFR

...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3710 Powered communication system. (a) Identification....

2011-04-01

301

21 CFR 890.3710 - Powered communication system.  

Code of Federal Regulations, 2012 CFR

...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3710 Powered communication system. (a) Identification....

2012-04-01

302

21 CFR 890.3700 - Nonpowered communication system.  

Code of Federal Regulations, 2014 CFR

...AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3700 Nonpowered communication system. (a) Identification....

2014-04-01

303

16.36 Communication Systems Engineering, Spring 2003  

E-print Network

Introduces the fundamentals of digital communications and networking. Topics covered include elements of information theory, sampling and quantization, coding, modulation, signal detection and system performance in the ...

Modiano, Eytan H.

304

Free space quantum system based on quantum secure direct communication  

NASA Astrophysics Data System (ADS)

A new practical free space quantum communication system is proposed, it is based on the principle of quantum secure direct communication. Quantum cryptography is a practical method to realize free space optical communication. Different from the existing free space quantum key distribution communication system, the free space quantum secure direct communication is deterministic and the system is more simple. In this paper, a new structure of four transmitting channels is prensented, this structure could increase the security and capacity of system. The setup of transmitter and receiver of each transmitting channel is discussed in detail, and the communication process is analyzed. The result shows that this free space quantum system could be realized and can work over long distance.

Ge, Hua; Liu, Wenyu

2007-11-01

305

Group Support Systems and Deceptive Communication  

Microsoft Academic Search

Electronic communication is becoming more pervasive worldwide with the spread of the Internet, especially through the World Wide Web and electronic mail. Yet, as with all human communication, electronic communication is vulnerable to deceit on the part of senders, and to the less than stellar performance of most people at defecting deceit aimed at them. Despite considerable research over the

Joey F. George; John R. Carlson

1999-01-01

306

Communication in reactive multiagent robotic systems  

Microsoft Academic Search

Multiple cooperating robots are able to complete many tasks more quickly and reliably than one robot alone. Communication between the robots can multiply their capabilities and effectiveness, but to what extent? In this research, the importance of communication in robotic societies is investigated through experiments on both simulated and real robots. Performance was measured for three different types of communication

Tucker R. Balch; Ronald C. Arkin

1994-01-01

307

Digital Autonomous Terminal Access Communication (DATAC) system  

NASA Technical Reports Server (NTRS)

In order to accommodate the increasing number of computerized subsystems aboard today's more fuel efficient aircraft, the Boeing Co. has developed the DATAC (Digital Autonomous Terminal Access Control) bus to minimize the need for point-to-point wiring to interconnect these various systems, thereby reducing total aircraft weight and maintaining an economical flight configuration. The DATAC bus is essentially a local area network providing interconnections for any of the flight management and control systems aboard the aircraft. The task of developing a Bus Monitor Unit was broken down into four subtasks: (1) providing a hardware interface between the DATAC bus and the Z8000-based microcomputer system to be used as the bus monitor; (2) establishing a communication link between the Z8000 system and a CP/M-based computer system; (3) generation of data reduction and display software to output data to the console device; and (4) development of a DATAC Terminal Simulator to facilitate testing of the hardware and software which transfer data between the DATAC's bus and the operator's console in a near real time environment. These tasks are briefly discussed.

Novacki, Stanley M., III

1987-01-01

308

Optimum Design for Optical Antenna of Space Laser Communication System  

Microsoft Academic Search

A new aspheric surface pre-collimation lenses system for the optical antenna of space laser communication has been optimum designed by optical design software CODE-V. Meanwhile, a Cassegrain antenna with aspheric surface has been designed. By the use of Visual C++, an optical system design software has been set up to analyze optical antenna for the space laser communication system, and

Huajun Yang; Yu Hu; Chenghong Li; Kang Xie; Jin Fu; Hu Wei

2006-01-01

309

The Picture Exchange Communication System: Digital Photographs versus Picture Symbols  

ERIC Educational Resources Information Center

The Picture Exchange Communication System (PECS) is an augmentative and alternative system (AAC) used to improve and increase communication for children with Autism Spectrum Disorder (ASD) and other developmental disorders. Research addressing the efficacy of this system is increasing; however, there is limited information published that evaluates…

Jonaitis, Carmen

2011-01-01

310

A Signal Processing System for Underwater Acoustic ROV Communication  

Microsoft Academic Search

A high performance system for communication with untethered underwater vehicles is presented. The system is centered around multiple digital processors which perform a variety of signal processing tasks. The processors are combined into an array using a flexible architecture designed for communication prcessing. A basic system has been tested at 5 kbit\\/sec over the Rayleigh-fading multipath channel in Woods Hole

Lee E. Freitag; J. A. Catipovic

1989-01-01

311

Risk communication for critical civil infrastructure systems Jack Baker1  

E-print Network

1 Risk communication for critical civil infrastructure systems Jack Baker1 , Jason Coray2 , Paul De for communicating risk within the context of infrastructure management decision support systems. A generic model of a risk-based infrastructure management system is presented to illustrate important relationships of key

Baker, Jack W.

312

77 FR 28797 - Redundancy of Communications Systems: Backup Power Private Land Mobile Radio Services: Selection...  

Federal Register 2010, 2011, 2012, 2013, 2014

...FEDERAL COMMUNICATIONS COMMISSION 47 CFR Parts 12 and 90 [DA 11-1838] Redundancy of Communications Systems: Backup Power Private...EA Licensing AGENCY: Federal Communications Commission. ACTION:...

2012-05-16

313

Bioluminescent system for dynamic imaging of cell and animal behavior  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer We combined a yellow variant of GFP and firefly luciferase to make ffLuc-cp156. Black-Right-Pointing-Pointer ffLuc-cp156 showed improved photon yield in cultured cells and transgenic mice. Black-Right-Pointing-Pointer ffLuc-cp156 enabled video-rate bioluminescence imaging of freely-moving animals. Black-Right-Pointing-Pointer ffLuc-cp156 mice enabled tracking real-time drug delivery in conscious animals. -- Abstract: The current utility of bioluminescence imaging is constrained by a low photon yield that limits temporal sensitivity. Here, we describe an imaging method that uses a chemiluminescent/fluorescent protein, ffLuc-cp156, which consists of a yellow variant of Aequorea GFP and firefly luciferase. We report an improvement in photon yield by over three orders of magnitude over current bioluminescent systems. We imaged cellular movement at high resolution including neuronal growth cones and microglial cell protrusions. Transgenic ffLuc-cp156 mice enabled video-rate bioluminescence imaging of freely moving animals, which may provide a reliable assay for drug distribution in behaving animals for pre-clinical studies.

Hara-Miyauchi, Chikako [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan) [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan); Laboratory for Cell Function Dynamics, Brain Science Institute, RIKEN, Saitama 351-0198 (Japan); Department of Biophysics and Biochemistry, Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo 113-8510 (Japan); Tsuji, Osahiko [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan) [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan); Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo 160-8582 (Japan); Hanyu, Aki [Division of Biochemistry, The Cancer Institute of the Japanese Foundation for Cancer Research, Tokyo 135-8550 (Japan)] [Division of Biochemistry, The Cancer Institute of the Japanese Foundation for Cancer Research, Tokyo 135-8550 (Japan); Okada, Seiji [Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582 (Japan)] [Department of Advanced Medical Initiatives, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582 (Japan); Yasuda, Akimasa [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan) [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan); Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo 160-8582 (Japan); Fukano, Takashi [Laboratory for Cell Function Dynamics, Brain Science Institute, RIKEN, Saitama 351-0198 (Japan)] [Laboratory for Cell Function Dynamics, Brain Science Institute, RIKEN, Saitama 351-0198 (Japan); Akazawa, Chihiro [Department of Biophysics and Biochemistry, Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo 113-8510 (Japan)] [Department of Biophysics and Biochemistry, Graduate School of Health Care Sciences, Tokyo Medical and Dental University, Tokyo 113-8510 (Japan); Nakamura, Masaya [Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo 160-8582 (Japan)] [Department of Orthopedic Surgery, Keio University School of Medicine, Tokyo 160-8582 (Japan); Imamura, Takeshi [Department of Molecular Medicine for Pathogenesis, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295 (Japan) [Department of Molecular Medicine for Pathogenesis, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295 (Japan); Core Research for Evolutional Science and Technology, The Japan Science and Technology Corporation, Tokyo 135-8550 (Japan); Matsuzaki, Yumi [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan)] [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan); Okano, Hirotaka James, E-mail: hjokano@jikei.ac.jp [Department of Physiology, Keio University School of Medicine, Tokyo 160-8582 (Japan); Division of Regenerative Medicine Jikei University School of Medicine, Tokyo 150-8461 (Japan); and others

2012-03-09

314

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

315

Physical constraints on acoustic communication in the atmosphere: Implications for the evolution of animal vocalizations  

Microsoft Academic Search

1.Acoustic communication requires not only detection of the signal but also discrimination of differences among signals by the receiver. Attenuation and degradation of acoustic signals during transmission through the atmosphere will impose limits on acoustic communication. Attenuation of sound during atmospheric transmission results primarily from atmospheric absorption, ground attenuation, scattering of a sound beam, and deflection of sound by stratified

R. Haven Wiley; Douglas G. Richards

1978-01-01

316

Suitability of ANSI standards for quantifying communication satellite system performance  

NASA Technical Reports Server (NTRS)

A study on the application of American National Standards X3.102 and X3.141 to various classes of communication satellite systems from the simple analog bent-pipe to NASA's Advanced Communications Technology Satellite (ACTS) is discussed. These standards are proposed as means for quantifying the end-to-end communication system performance of communication satellite systems. An introductory overview of the two standards are given followed by a review of the characteristics, applications, and advantages of using X3.102 and X3.141 to quantify with a description of the application of these standards to ACTS.

Cass, Robert D.

1988-01-01

317

MSFC Skylab instrumentation and communication system mission evaluation  

NASA Technical Reports Server (NTRS)

An evaluation of the in-orbit performance of the instrumentation and communications systems installed on Skylab is presented. Performance is compared with functional requirements and the fidelity of communications. In-orbit performance includes processing engineering, scientific, experiment, and biomedical data, implementing ground-generated commands, audio and video communication, generating rendezvous ranging information, and radio frequency transmission and reception. A history of the system evolution based on the functional requirements and a physical description of the launch configuration is included. The report affirms that the instrumentation and communication system satisfied all imposed requirements.

Adair, B. M.

1974-01-01

318

Optical wireless communications within fourth-generation wireless systems [Invited  

NASA Astrophysics Data System (ADS)

Feature Issue on Optical Wireless Communications (OWC) It is commonly agreed that the next generation of wireless communication systems, usually referred to as fourth-generation (4G) systems, will not be based on a single access technique but will encompass a number of different complementary access technologies. We outline some of the radio frequency (RF) standards that will be used and assess where optical wireless (OW) communications may play a role. Further, we outline some future research challenges and opportunities.

O'Brien, Dominic C.; Katz, Marcos

2005-06-01

319

A Molecular Communication System Model for Particulate Drug Delivery Systems.  

PubMed

The goal of a Drug Delivery System (DDS) is to convey a drug where the medication is needed, while, at the same time, preventing the drug from affecting other healthy parts of the body. Drugs composed of micro or nano-sized particles (particulate DDS) that are able to cross barriers which prevent large particles from escaping the bloodstream are used in the most advanced solutions.Molecular Communication (MC) is used as an abstraction of the propagation of drug particles in the body. MC is a new paradigm in communication research where the exchange of information is achieved through the propagation of molecules. Here, the transmitter is the drug injection, the receiver is the drug delivery and the channel is realized by the transport of drug particles, thus enabling the analysis and design of a particulate DDS using communication tools. This is achieved by modeling the MC channel as two separate contributions, namely, the cardiovascular network model and the drug propagation network. The cardiovascular network model allows to analytically compute the blood velocity profile in every location of the cardiovascular system given the flow input by the heart. The drug propagation network model allows the analytical expression of the drug delivery rate at the targeted site given the drug injection rate. Numerical results are also presented to assess the flexibility and accuracy of the developed model. The study of novel optimization techniques for a more effective and less invasive drug delivery will be aided by this model, while paving the way for novel communication techniques for Intra-Body communication Networks (IBN). PMID:23807425

Chahibi, Youssef; Pierobon, Massimiliano; Song, Sang Ok; Akyildiz, Ian

2013-06-27

320

Mobile satellite communications systems: Toward global personal communications  

Microsoft Academic Search

The constraints imposed by the RF environment are reviewed. An overview of present and planned mobile satellite systems is given. Present systems refer to those already in operation, while planned systems refer to those that have authority to offer the services and have either a satellite in orbit or one being built to support the systems. Future directions for mobile

John H. Lodge

1991-01-01

321

Reactive animation: from piecemeal experimentation to reactive biological systems.  

PubMed

Over the past decade, multi-level complex behavior and reactive nature of biological systems, has been a focus point for the biomedical community. We have developed a computational approach, termed Reactive Animation (RA) for simulating such complex biological systems. RA is an approach for describing the dynamic characteristics of biological systems based on facts collected from experiments. These data are integrated bottom-up by computational tools and methods for reactive systems development and are simulated concomitantly to a front-end user friendly visualization and reporting systems. Using RA, the experimenter may intervene mid-simulation, suggest new hypotheses for cellular and molecular interactions, apply them to the simulation and observe their resulting outcomes "on-line". Several RA models have been developed including models of T cell activation, thymocyte development and pancreatic organogenesis, which are describe in the in this review. PMID:21244340

Vainas, Oded; Harel, David; Cohen, Irun R; Efroni, Sol

2011-06-01

322

Multi-Agent System Dynamics: Bifurcation and Behavior of Animal Groups  

E-print Network

Multi-Agent System Dynamics: Bifurcation and Behavior of Animal Groups Naomi Ehrich Leonard of collective animal behavior. Animals in groups, from bird flocks to fish schools, employ decentralized: Multi-agent systems, Coordinated control, Nonlinear dynamics, Collective animal behavior, Social

Leonard, Naomi

323

Communication Systems for Grid Integration of Renewable Energy Resources  

E-print Network

There is growing interest in renewable energy around the world. Since most renewable sources are intermittent in nature, it is a challenging task to integrate renewable energy resources into the power grid infrastructure. In this grid integration, communication systems are crucial technologies, which enable the accommodation of distributed renewable energy generation and play extremely important role in monitoring, operating, and protecting both renewable energy generators and power systems. In this paper, we review some communication technologies available for grid integration of renewable energy resources. Then, we present the communication systems used in a real renewable energy project, Bear Mountain Wind Farm (BMW) in British Columbia, Canada. In addition, we present the communication systems used in Photovoltaic Power Systems (PPS). Finally, we outline some research challenges and possible solutions about the communication systems for grid integration of renewable energy resources.

Yu, F Richard; Xiao, Weidong; Choudhury, Paul

2011-01-01

324

Neuropathic Pain in Animal Models of Nervous System Autoimmune Diseases  

PubMed Central

Neuropathic pain is a frequent chronic presentation in autoimmune diseases of the nervous system, such as multiple sclerosis (MS) and Guillain-Barre syndrome (GBS), causing significant individual disablement and suffering. Animal models of experimental autoimmune encephalomyelitis (EAE) and experimental autoimmune neuritis (EAN) mimic many aspects of MS and GBS, respectively, and are well suited to study the pathophysiology of these autoimmune diseases. However, while much attention has been devoted to curative options, research into neuropathic pain mechanisms and relief has been somewhat lacking. Recent studies have demonstrated a variety of sensory abnormalities in different EAE and EAN models, which enable investigations of behavioural changes, underlying mechanisms, and potential pharmacotherapies for neuropathic pain associated with these diseases. This review examines the symptoms, mechanisms, and clinical therapeutic options in these conditions and highlights the value of EAE and EAN animal models for the study of neuropathic pain in MS and GBS. PMID:23737643

Tian, David H.; Perera, Chamini J.; Moalem-Taylor, Gila

2013-01-01

325

Bonneville Power Administration Communication Alarm Processor expert system:  

SciTech Connect

This report describes the Communications Alarm Processor (CAP), a prototype expert system developed for the Bonneville Power Administration by Oak Ridge National Laboratory. The system is designed to receive and diagnose alarms from Bonneville's Microwave Communications System (MCS). The prototype encompasses one of seven branches of the communications network and a subset of alarm systems and alarm types from each system. The expert system employs a backward chaining approach to diagnosing alarms. Alarms are fed into the expert system directly from the communication system via RS232 ports and sophisticated alarm filtering and mailbox software. Alarm diagnoses are presented to operators for their review and concurrence before the diagnoses are archived. Statistical software is incorporated to allow analysis of archived data for report generation and maintenance studies. The delivered system resides on a Digital Equipment Corporation VAX 3200 workstation and utilizes Nexpert Object and SAS for the expert system and statistical analysis, respectively. 11 refs., 23 figs., 7 tabs.

Goeltz, R.; Purucker, S.; Tonn, B. (Oak Ridge National Lab., TN (USA)); Wiggen, T. (Oak Ridge Associated Universities, Inc., TN (USA)); MacGregor, D. (MacGregor-Bates, Inc., Eugene, OR (USA))

1990-06-01

326

Social media and its dual use in biopreparedness: communication and visualization tools in an animal bioterrorism incident.  

PubMed

This article focuses on social media and interactive challenges for emergency organizations during a bioterrorism or agroterrorism incident, and it outlines the dual-use dilemma of social media. Attackers or terrorists can use social media as their modus operandi, and defenders, including emergency organizations in law enforcement and public and animal health, can use it for peaceful purposes. To get a better understanding of the uses of social media in these situations, a workshop was arranged in Stockholm, Sweden, to raise awareness about social media and animal bioterrorism threats. Fifty-six experts and crisis communicators from international and national organizations participated. As a result of the workshop, it was concluded that emergency organizations can collect valuable information and monitor social media before, during, and after an outbreak. In order to make use of interactive communication to obtain collective intelligence from the public, emergency organizations must adapt to social networking technologies, requiring multidisciplinary knowledge in the fields of information, communication, IT, and biopreparedness. Social network messaging during a disease outbreak can be visualized in stream graphs and networks showing clusters of Twitter and Facebook users. The visualization of social media can be an important preparedness tool in the response to bioterrorism and agroterrorism. PMID:23971817

Sjöberg, Elisabeth; Barker, Gary C; Landgren, Jonas; Griberg, Isaac; Skiby, Jeffrey E; Tubbin, Anna; von Stapelmohr, Anne; Härenstam, Malin; Jansson, Mikael; Knutsson, Rickard

2013-09-01

327

C. T. Lin, S. P. Shieh / Chain Authentication in Mobile Communication Systems Chain Authentication in Mobile Communication  

E-print Network

C. T. Lin, S. P. Shieh / Chain Authentication in Mobile Communication Systems 1 Chain Authentication in Mobile Communication Systems Chern-Tang Lin, Shiuh-Pyng Shieh Department of Computer Science parties and the confidentiality of communication channels, must be embedded into mobile communication

Shieh, Shiuhpyng Winston

328

Advanced integrated WDM system for POF communication  

NASA Astrophysics Data System (ADS)

Polymer Optical Fibres (POFs) show clear advantages compared to copper and glass fibres. In essence, POFs are inexpensive, space-saving and not susceptible to electromagnetic interference. Thus, the usage of POFs have become a reasonable alternative in short distance data communication. Today, POFs are applied in a wide number of applications due to these specific advantages. These applications include automotive communication systems and in-house-networks. State-of-the-art is to transmit data with only one channel over POF, this limits the bandwidth. To solve this problem, an integrated MUX/DEMUX-element for WDM over POF is designed and developed to use multiple channels. This integration leads to low costs, therefore this component is suitable for mass market applications. The fundamental idea is to separate the chromatic parts of the light in its monochromatic components by means of a grating based on an aspheric mirror. Due to the high NA of the POF the setup has to be designed in a 3D-approach. Therefore this setup cannot be compared with the planar solutions available on market, they would result high losses in the 3rd dimension. To achieve a fast and optimized design an optical simulation program is used. Particular attention has to be paid to the design of the POF as a light source in the simulation program and the optimisation of the grating. The following realization of the demultiplexer is planed to be done with injection molding. This technology offers easy and very economical processing. These advantages make this technology first choice for optical components in the low-cost array.

Haupt, M.; Fischer, U. H. P.

2009-01-01

329

Iridium{reg_sign} worldwide personal communication system  

SciTech Connect

The IRIDIUM system is a personal worldwide communication system designed to support portable, low power subscriber units through the use of a constellation of satellites in low earth polar orbit. The satellites are networked together to form a system which provides continuous line-of-sight communications between the IRIDIUM system and any point within 30 km of the earth{close_quote}s surface. The system architecture and operation are described. {copyright} {ital 1997 American Institute of Physics.}

Helm, J. [Senior Systems Engineer Motorola Mobile Satellite Systems Division 1600 W. Chandler Blvd., Suite 150 Chandler, Arizona85224 (United States)

1997-01-01

330

Antigone: Policy-based Secure Group Communication System  

E-print Network

Antigone: Policy-based Secure Group Communication System and AMirD: Antigone-based Secure File Patrick McDaniel AT&T Labs - Research P.O. Box 971 Florham Park, NJ 07932-0971 Project web site: http://antigone.eecs.umich.edu This demonstration gives examples of how the Antigone policy-based secure group communication system supports

Prakash, Atul

331

Underground Mine Communication and Tracking Systems : A Survey  

E-print Network

-ordination of tasks, a communication and tracking system is one of the more important infrastructures that needs level of risk involved in underground mining operation as compared to any other industry. Underground, a communication and tracking system is one of the more important infrastructures that needs to be deployed

New South Wales, University of

332

Low earth orbit satellite based communication systems — Research opportunities  

Microsoft Academic Search

Telecommunication systems are undergoing revolutionary changes that are transforming society, changing the way in which industrial and service organizations operate, and are having a profound effect on the daily life of individuals. Low earth orbit satellite (LEOS) based communication systems are a new and exciting endeavor in reshaping the global communication network and the services that it provides. Huge investments

Bezalel Gavish

1997-01-01

333

Multiple-User Adaptive-Array Communication System  

NASA Technical Reports Server (NTRS)

Weights for K-beam system computed K/6 times faster. In single-frequency adaptive-array communication system in whick K mobile users communicate with central station equipped with n-antenna array. Each K signal recoverable by taking specific weighted sum of n complex antenna voltages.

Zohar, S.

1985-01-01

334

DOLPHIN for inter-vehicle communications system  

Microsoft Academic Search

Inter-vehicle communications (IVC) technology for group cooperative driving has been studied by the Association of Electronic Technology for Automobile Traffic and Driving (JSK) since 1980 in Japan. The study of the IVC technology has been focussed on the communication protocol. This paper proposes DOLPHIN (dedicated omni-purpose inter-vehicle communication linkage protocol for highway automation) and presents its performance evaluation results

K. Tokuda; M. Akiyama; H. Fujii

2000-01-01

335

Technology Evaluation of Programmable Communicating Thermostats with Radio Broadcast Data System Communications  

SciTech Connect

Programmable Communicating Thermostats are thermostats that can be programmed by the user to respond to signals indicating a grid-level system emergency or pricing event. The California Energy Commission is considering standards that would include a requirement for Programmable Communicating Thermostats in residential and small commercial applications. The current specification for Programmable Communicating Thermostats requires Radio Data System communications to Programmable Communicating Thermostats. This study tested the signal strength and reliability of Radio Data System signals at 40 customer sites within the Sacramento Municipal Utility District, which is serviced by 17 radio stations that already transmit Radio Data System signals. The study also tested the functionality of a commercially available Programmable Communicating Thermostat for compliance with California Energy Commission design standards. Test results demonstrated that Radio Data System is capable of reliably sending price and emergency signals. This study also provides evidence that existing Programmable Communicating Thermostats, on receiving a Radio Data System pricing or event signal, are capable of automatically increasing set points to a customer-determined or utility-determined level, thus providing air-conditioning demand response within seconds or just a few (less than 5) minutes.

Herter, Karen; Wayland, Seth

2008-10-31

336

Development of the optical biopsy system for small experimental animals  

NASA Astrophysics Data System (ADS)

Development of the optical biopsy system for experimental small animals is in progress. A prototype of the system which consists of a miniaturized gastro endoscope unit and Raman probes has been completed by now. The system is developed to study a gastric cancer rat model. The endoscope is 2.5 mm in diameter and is equipped an imaging bundle fiber, illumination fibers, a channel and a mechanism to angle the probe head. The head of the Raman probe comes out through the channel and it is possible to aim the probe to the target watching on the monitor. The endoscope was inserted into the anaesthetized healthy rat under the breathing support. It was successfully observed inside of the stomach of the living rat and measured Raman spectra. The spectrum of blood vessels contains the strong contribution from lipids. The present results demonstrate high potential of the system in the in vivo Raman study using the rat model.

Sato, Hidetoshi; Hattori, Yusuke; Oshima, Yusuke; Komachi, Yuichi; Katagiri, Takashi; Asakura, Toru; Shimosegawa, Toru; Matsuura, Yuji; Miyagi, Mitsunobu; Kanai, Gen'ichi; Ura, Nobuo; Masutani, Koji; Tashiro, Hideo

2006-02-01

337

Space Shuttle program communication and tracking systems interface analysis  

NASA Technical Reports Server (NTRS)

The Space Shuttle Program Communications and Tracking Systems Interface Analysis began April 18, 1983. During this time, the shuttle communication and tracking systems began flight testing. Two areas of analysis documented were a result of observations made during flight tests. These analyses involved the Ku-band communication system. First, there was a detailed analysis of the interface between the solar max data format and the Ku-band communication system including the TDRSS ground station. The second analysis involving the Ku-band communication system was an analysis of the frequency lock loop of the Gunn oscillator used to generate the transmit frequency. The stability of the frequency lock loop was investigated and changes to the design were reviewed to alleviate the potential loss of data due the loop losing lock and entering the reacquisition mode. Other areas of investigation were the S-band antenna analysis and RF coverage analysis.

Dodds, J. G.; Holmes, J. K.; Huth, G. K.; Iwasaki, R. S.; Nilsen, P. W.; Polydoros, A.; Sampaio, D. R.; Udalov, S.

1984-01-01

338

Communications and control for electric power systems  

NASA Technical Reports Server (NTRS)

A long-term strategy for the integration of new control technologies for power generation and delivery is proposed: the industry would benefit from an evolutionary approach that would adapt to its needs future technologies as well as those that it has so far not heeded. The integrated operation of the entire system, including the distribution system, was proposed as a future goal. The AbNET communication protocols are reviewed, and additions that were made in 1991 are described. In the original network, traffic was controlled by polling at the master station, located at the substation, and routed by a flooding algorithm. In a revised version, the polling and flooding are modified. The question of interfacing low-energy measurement transducers or instrument transformers is considered. There is presently little or no agreement on what the output of optical current transducers (CT's) should be. Appendices deal with the calibration of current transducers; with Delta modulation, a simple means of serially encoding the output of an OCT; and with noise shaping, a method of digital signal processing that trades off the number of bits in a digital sample for a higher number of samples.

Kirkham, H.

1992-01-01

339

Defense satellite communications system - Past, present, and future  

NASA Astrophysics Data System (ADS)

This is a critical point in the long history of the Defense Satellite Communications System. This workhorse communications system has developed from the humble beginnings in the 1960s into today's highly capable backbone of U.S. Government Communications. After a long delay these satellites are being launched again and plan to quickly rebuild this critical national asset which has been held together by determination and sweat following the Challenger disaster. The critical issue is what services shall DSCS provide in the future. The process of defining the SHF communications capability of the next generation of these satellites to support the military needs of the next century is under way.

Cook, Robert G.

1992-03-01

340

Gas Main Sensor and Communications Network System  

SciTech Connect

Automatika, Inc. was contracted by the Department of Energy (DOE) and with co-funding from the Northeast Gas Association (NGA), to develop an in-pipe natural gas prototype measurement and wireless communications system for assessing and monitoring distribution networks. This projected was completed in April 2006, and culminated in the installation of more than 2 dozen GasNet nodes in both low- and high-pressure cast-iron and steel mains owned by multiple utilities in the northeastern US. Utilities are currently logging data (off-line) and monitoring data in real time from single and multiple networked sensors over cellular networks and collecting data using wireless bluetooth PDA systems. The system was designed to be modular, using in-pipe sensor-wands capable of measuring, flow, pressure, temperature, water-content and vibration. Internal antennae allowed for the use of the pipe-internals as a waveguide for setting up a sensor network to collect data from multiple nodes simultaneously. Sensor nodes were designed to be installed with low- and no-blow techniques and tools. Using a multi-drop bus technique with a custom protocol, all electronics were designed to be buriable and allow for on-board data-collection (SD-card), wireless relaying and cellular network forwarding. Installation options afforded by the design included direct-burial and external polemounted variants. Power was provided by one or more batteries, direct AC-power (Class I Div.2) and solar-array. The utilities are currently in a data-collection phase and intend to use the collected (and processed) data to make capital improvement decisions, compare it to Stoner model predictions and evaluate the use of such a system for future expansion, technology-improvement and commercialization starting later in 2006.

Hagen Schempf

2006-05-31

341

Picture archiving and communications systems (PACS).  

PubMed

Although there has been a recent increase in interest in picture archiving and communications systems (PACS) topics, little has been published to assist the non-technical person in understanding the complexities of the technologies required for a PACS implementation. This issue of Current Problems in Radiology defines each PACS component and explains why each is important in a system design. PACS installations at the University of Florida are used as examples to tie the concepts together. The infrastructure required for PACS consists of the information system interfaces, networks, and databases. Information system interfaces guarantee consistent patient data across all platforms and reduce labor requirements by eliminating duplicate data entry. Data networks move information from the originating location to users around the hospital, clinic, campus, city, or world. In the PACS environment, the data consist of patient and study information as well as images and information about these images. Databases organize the data from multiple sources into a coherent package that can be queried for many different purposes, such as retrieving images, reviewing patient and study information, studying practice statistics, and performing outcomes analysis. PACS components consist of acquisition nodes, archives, and output devices. Acquisition nodes may include "digital modalities" such as CT, MRI, nuclear medicine, and computed radiography (CR), along with devices to convert from analog to digital, such as digitizers and frame grabbers. Options for archives are discussed along with configuration schemes. Output devices include both hard copy (film and paper prints) and soft copy (workstations for display and diagnosis). Finally, a description of the PACS installations at the University of Florida is presented, with comments on some of the difficulties and complexities encountered. A discussion of the cost and benefits of PACS is included, along with a forecast of the future of PACS. PMID:7924419

Honeyman, J C; Frost, M M; Huda, W; Loeffler, W; Ott, M; Staab, E V

1994-01-01

342

Developing an Approach for Analyzing and Verifying System Communication  

NASA Technical Reports Server (NTRS)

This slide presentation reviews a project for developing an approach for analyzing and verifying the inter system communications. The motivation for the study was that software systems in the aerospace domain are inherently complex, and operate under tight constraints for resources, so that systems of systems must communicate with each other to fulfill the tasks. The systems of systems requires reliable communications. The technical approach was to develop a system, DynSAVE, that detects communication problems among the systems. The project enhanced the proven Software Architecture Visualization and Evaluation (SAVE) tool to create Dynamic SAVE (DynSAVE). The approach monitors and records low level network traffic, converting low level traffic into meaningful messages, and displays the messages in a way the issues can be detected.

Stratton, William C.; Lindvall, Mikael; Ackermann, Chris; Sibol, Deane E.; Godfrey, Sally

2009-01-01

343

An optical system for line-of-sight communication  

E-print Network

We design and implement a system for short and medium range directional two-way wireless communication. The system uses infrared radiation to transmit and receive voice data digitally. We utilize narrow angle infrared light ...

Mehta, Agustya R

2009-01-01

344

Human body communication system with FSBT  

Microsoft Academic Search

There are some leakage radiations from human body depending on incoming signals to it. As there are many noises in the frequency band spanning several MHz, human body communication (HBC), which is a technique to transfer various information through the human body as a communication channel, requires a limitation of frequencies and data rates to support a reliable network that

Hyung-il Park; In-gi Lim; Sungweon Kang; Whan-woo Kim

2010-01-01

345

Long-haul atmospheric laser communication systems  

Microsoft Academic Search

Optical communications provides an attractive means of achieving wideband data transfer over long distances. We review perceived challenges and enabling technology developments that promise to facilitate a new era of free-space laser communications. OCIS codes: (060.2605) Free-space optical comm.; (060.4510) Optical comm..; (010.1300) Atmospheric propagation

S. A. Hamilton; R. S. Bondurant; D. M. Boroson; J. W. Burnside; D. O. Caplan; E. A. Dauler; A. S. Fletcher; S. Michael; R. J. Murphy; B. S. Robinson; J. J. Scozzafava; N. W. Spellmeyer; T. G. Ulmer; F. G. Walther

2011-01-01

346

Single Switch Chinese Phonetic Communication System  

Microsoft Academic Search

Morse code, with its single switch operation, has been shown to be an excellent adaptive communication device for the disabled, especially those with impaired hand coordination and dexterity. Because a stable typing rate is required for an accurate rec- ognition of Morse code, it presents a major hindrance to disabled persons in applying Morse code as a useful communication tool.

Cheng-hong Yang; Cheng-huei Yang; Li-yeh Chuang; Ching-hsing Luo

2002-01-01

347

Effects on Communicative Requesting and Speech Development of the Picture Exchange Communication System in Children with Characteristics of Autism  

Microsoft Academic Search

Few studies on augmentative and alternative communication (AAC) systems have addressed the potential for such systems to impact word utterances in children with autism spectrum disorders (ASD). The Picture Exchange Communication System (PECS) is an AAC system designed specifically to minimize difficulties with communication skills experienced by individuals with ASD. The current study examined the role of PECS in improving

Jennifer B. Ganz; Richard L. Simpson

2004-01-01

348

A Time Domain Fluorescence Tomography System for Small Animal Imaging  

PubMed Central

We describe the application of a time domain diffuse fluorescence tomography system for whole body small animal imaging. The key features of the system are the use of point excitation in free space using ultrashort laser pulses and noncontact detection using a gated, intensified charge-coupled device (CCD) camera. Mouse shaped epoxy phantoms, with embedded fluorescent inclusions, were used to verify the performance of a recently developed asymptotic lifetime-based tomography algorithm. The asymptotic algorithm is based on a multiexponential analysis of the decay portion of the data. The multiexponential model is shown to enable the use of a global analysis approach for a robust recovery of the lifetime components present within the imaging medium. The surface boundaries of the imaging volume were acquired using a photogrammetric camera integrated with the imaging system, and implemented in a Monte-Carlo model of photon propagation in tissue. The tomography results show that the asymptotic approach is able to separate axially located fluorescent inclusions centered at depths of 4 and 10 mm from the surface of the mouse phantom. The fluorescent inclusions had distinct lifetimes of 0.5 and 0.95 ns. The inclusions were nearly overlapping along the measurement axis and shown to be not resolvable using continuous wave (CW) methods. These results suggest the practical feasibility and advantages of a time domain approach for whole body small animal fluorescence molecular imaging, particularly with the use of lifetime as a contrast mechanism. PMID:18672432

Raymond, Scott B.; Dunn, Andrew K.; Bacskai, Brian J.; Boas, David A.

2010-01-01

349

An ethanol vapor chamber system for small animals.  

PubMed

Ethanol vapor chambers have been utilized widely in alcohol research since their introduction in 1971, and implementations of these systems are now available commercially. Here, we present a modification of the chamber that can be built at lower cost and greater simplicity of operation. The six-chamber system for rats has multiple air pumps. Ethanol vapor levels are adjusted with the air flow rate, ethanol drip rate, and dilution with room air, without a heater or fans. Ethanol vapor concentrations are measured with a breathalyzer, using room air to dilute the vapor chamber output into the range of the breathalyzer. Multiple pumps provide backup to ensure animal survival in the case of failure of the primary air pump. Tests in animals demonstrated comfortable and stable elevation of blood ethanol, with tight control of the ethanol vapor concentrations and the ability to select from a broad range of levels. The ethanol vapor measurement was rapid and efficient. The parts cost was a few thousand U.S. dollars. This vapor chamber system features low cost, ease of use, and convenient and inexpensive measurement of ethanol vapor concentrations. The lack of a heater and electrical components that could come into contact with ethanol in our case facilitated institutional approval. PMID:22575431

Wang, Jie; Jiang, Lihong; Du, Hongying; Mason, Graeme F

2012-06-30

350

Realization of Robot Communication System Based on Linux  

Microsoft Academic Search

Based on Linux, the focus on this paper is how to realize long-distance and short-distance duplex control mode of robot system. The communications system is made of two parts: terminal of embedded Linux system and robot system. Using the technology of GSM\\/GPPS expander board and Qt\\/embedded software, through GPRS network and serial communication separately, realizing long-distance or short-distance duplex control

Bao Man; Guo pei-yuan

2009-01-01

351

Coded error probability evaluation for antijam communication systems  

NASA Technical Reports Server (NTRS)

We present a general union-Chernoff bound on the bit error probability for coded communication systems and apply it to examples of antijam systems. The key feature of this bound is the decoupling of the coding aspects of the system from the remaining part of the communication system which includes jamming, suboptimum detectors, and arbitrary decoding metrics which may or may not use jammer state knowledge

Omura, J. K.; Levitt, B. K.

1982-01-01

352

INTRODUCTION As one of the most common forms of communication in animals  

E-print Network

imparted from a loudspeaker onto a substrate. However, the pickup of airborne signals by the substrate by repositioning each plant to the loudspeaker. Fourth, we look at how vibrationally signaling animals interact

Rodríguez, Rafael Lucas

353

Communication and remote control approaches to road surface carrying system  

NASA Astrophysics Data System (ADS)

In this paper, we present a novel control approach which is fusion techniques of factory automation/management and functions of hardware for computer communication. We describe the communication techniques between computer and programmable logic controller based on special system protocols. The developed controller innovated prior knowledge from some files, is considered as guides for the relevant controller designers and programmers, and a reference on establishing practical database for intelligent agents and on communication tasks.

Wang, Xin; Wang, Jin

2013-07-01

354

PM: An Operating System Coordinated High Performance Communication Library  

Microsoft Academic Search

. We have developed a new communication library, called PM,for the Myrinet gigabit LAN card, that has a dedicated processor andon-board memory to handle a communication protocol. In order to obtainhigh performance communication and support a multi-user environment,we have co-desgined PM, an operating system realized by adaemon process, and the run-time routine for a programming language.Several unique features, e.g., network

Hiroshi Tezuka; Atsushi Hori; Yutaka Ishikawa; Mitsuhisa Sato

1997-01-01

355

VoIP communication QoS analysis system  

Microsoft Academic Search

In the last years we are witnessing a merging trend towards unified communication systems over IP protocols from desktop to handheld devices. However, current IP communication protocols are based on best-effort services with limited or no QoS control. The lack of cost-effective or power-aware QoS strategies is felt negatively directly by the end user in terms of both communication quality

N. Ghiata; M. Marcu

2010-01-01

356

A silicon early visual system as a model animal Tobi Delbruck *, Shih-Chii Liu  

E-print Network

A silicon early visual system as a model animal Tobi Delbruck *, Shih-Chii Liu Institute-friendly silicon model of the early visual system that contributes to animal welfare. The silicon chip emulates

Delbruck, Tobi

357

Systems nutrition: an innovation of a scientific system in animal nutrition.  

PubMed

The traditional scientific system of animal nutrition has existed for over 100 years, but substantial changes are yet to take place. With the lapse of time, limitations of this traditional scientific system have been more and more evident and such a system should be dramatically revised with innovations. Beginning in the late 1980s, our group started to use system-science principles and approaches in animal nutrition research. The author published a book entitled "An Introduction to Systems-Nutrition of Animals", which marked the birth of a new scientific system in animal nutrition to stimulate further development of this discipline. System-nutrition is defined as a branch of biological sciences that concerns system-level studies of the integrative picture of flux, metabolism, utilization and regulation of nutrients (e.g., proteins and amino acids) from dietary and endogenous origin in the whole animal system at organism, organs, tissues, cells and molecules levels to achieve such goals as nutritional manipulation and prediction, as well as optimum feeding decision and optimum nutritional engineering programs for animal feeding. PMID:24389141

Lu, De-Xun

2014-01-01

358

Theoretical analysis of parallel combinatory spread-spectrum communication system for optical wireless communications  

Microsoft Academic Search

In this paper, an N-CSK (N parallel Codes Shift Keying) using modified pseudo orthogonal M-sequence sets (MPOMS) for applying the parallel combinatory spread-spectrum (PC\\/SS) communication system to the optical communication is presented. Moreover, the bit error rate (BER) performance and the data transmission rate of the proposed system are evaluated through theoretical analysis by taking into account the scintillation, background-noise,

Yusuke Kozawa; Hiromasa Habuchi

2011-01-01

359

Communication technology is integral to most aerospace systems. Communication satel-lites bring us live coverage of events from around the world, deep-space communication  

E-print Network

#12;Communication technology is integral to most aerospace systems. Communication satel- lites bring us live coverage of events from around the world, deep-space communication links offer vivid images from outer space, and aircraft rely on communications for com- mand and control. In many locations

Peraire, Jaime

360

Lessons Learned from Designing a Programming System to Support Middle School Girls Creating Animated Stories  

E-print Network

of creating Pixar-style animated 3D movies (i.e. storytelling) will help moti- vate girls to learn to program animated stories. In this paper, we present a case study in designing a version of the Alice programming specifically designed for storytelling. In the programming systems for 2D animation, children create animations

Kelleher, Caitlin

361

Multi-Agent System Dynamics: Bifurcation and Behavior of Animal Groups  

E-print Network

Multi-Agent System Dynamics: Bifurcation and Behavior of Animal Groups Naomi Ehrich Leonard of collective animal behavior. Animals in groups, from bird flocks to fish schools, employ decentralized-performing dynamics drawn from observations and understanding of collective behavior in animal groups. The study

Leonard, Naomi

362

MotionMontage: A System to Annotate and Composite Motion Takes for 3D Animations  

E-print Network

animation, a director may ask the animator to per- form multiple takes in order to test different stylesMotionMontage: A System to Annotate and Composite Motion Takes for 3D Animations Ankit Gupta-based performance capture setup that allows anima- tors to create 3D animations by tracking the motion of a rigid

California at Irvine, University of

363

Relating Communications Mode Choice and Teamwork Quality: Conversational versus Textual Communication in IT System and Software Development Teams  

ERIC Educational Resources Information Center

This cross-sectional study explored how IT system and software development team members communicated in the workplace and whether teams that used more verbal communication (and less text-based communication) experienced higher levels of collaboration as measured using the Teamwork Quality (TWQ) scale. Although computer-mediated communication tools…

Smith, James Robert

2012-01-01

364

75 FR 8400 - In the Matter of Certain Wireless Communications System Server Software, Wireless Handheld...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Wireless Communications System Server Software, Wireless Handheld Devices and Battery...wireless communications system server software, wireless handheld devices and battery...wireless communications system server software, wireless handheld devices or...

2010-02-24

365

49 CFR 1242.79 - Communication systems operations (account XX-55-77).  

Code of Federal Regulations, 2012 CFR

...Communication systems operations (account XX-55-77). 1242.79 Section 1242...Communication systems operations (account XX-55-77). Separate common expenses...separation of Communication Systems (account XX-19-20), §...

2012-10-01

366

49 CFR 1242.79 - Communication systems operations (account XX-55-77).  

Code of Federal Regulations, 2010 CFR

...Communication systems operations (account XX-55-77). 1242.79 Section 1242...Communication systems operations (account XX-55-77). Separate common expenses...separation of Communication Systems (account XX-19-20), §...

2010-10-01

367

49 CFR 1242.79 - Communication systems operations (account XX-55-77).  

Code of Federal Regulations, 2011 CFR

...Communication systems operations (account XX-55-77). 1242.79 Section 1242...Communication systems operations (account XX-55-77). Separate common expenses...separation of Communication Systems (account XX-19-20), §...

2011-10-01

368

49 CFR 1242.79 - Communication systems operations (account XX-55-77).  

Code of Federal Regulations, 2013 CFR

...Communication systems operations (account XX-55-77). 1242.79 Section 1242...Communication systems operations (account XX-55-77). Separate common expenses...separation of Communication Systems (account XX-19-20), §...

2013-10-01

369

49 CFR 1242.79 - Communication systems operations (account XX-55-77).  

Code of Federal Regulations, 2014 CFR

...Communication systems operations (account XX-55-77). 1242.79 Section 1242...Communication systems operations (account XX-55-77). Separate common expenses...separation of Communication Systems (account XX-19-20), §...

2014-10-01

370

14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.  

Code of Federal Regulations, 2013 CFR

...Establishment of the NASA Unified Visual Communications System. 1221.108 Section...the Agency's Unified Visual Communications System § 1221.108 Establishment of the NASA Unified Visual Communications System. (a) The NASA...

2013-01-01

371

14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.  

Code of Federal Regulations, 2011 CFR

...Establishment of the NASA Unified Visual Communications System. 1221.108 Section...the Agency's Unified Visual Communications System § 1221.108 Establishment of the NASA Unified Visual Communications System. (a) The NASA...

2011-01-01

372

14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.  

Code of Federal Regulations, 2012 CFR

...Establishment of the NASA Unified Visual Communications System. 1221.108 Section...the Agency's Unified Visual Communications System § 1221.108 Establishment of the NASA Unified Visual Communications System. (a) The NASA...

2012-01-01

373

14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.  

Code of Federal Regulations, 2014 CFR

...Establishment of the NASA Unified Visual Communications System. 1221.108 Section...the Agency's Unified Visual Communications System § 1221.108 Establishment of the NASA Unified Visual Communications System. (a) The NASA...

2014-01-01

374

14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.  

Code of Federal Regulations, 2010 CFR

...Establishment of the NASA Unified Visual Communications System. 1221.108 Section...the Agency's Unified Visual Communications System § 1221.108 Establishment of the NASA Unified Visual Communications System. (a) The NASA...

2010-01-01

375

78 FR 31576 - Enforcement Proceeding; Certain Two-Way Global Satellite Communication Devices, System and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Two-Way Global Satellite Communication Devices, System and Components...certain two-way global satellite communication devices, system and components...importation any two-way global satellite communication devices, system,...

2013-05-24

376

77 FR 58579 - Certain Two-Way Global Satellite Communication Devices, System and Components Thereof...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Two-Way Global Satellite Communication Devices, System and Components...certain two-way global satellite communication devices, system and components...certain two-way global satellite communication devices, system and...

2012-09-21

377

A high-sensitivity small animal SPECT system.  

PubMed

Medical imaging using single gamma-ray-emitting radionuclides typically makes use of parallel hole collimators or pinholes in order to achieve good spatial resolution. However, a tradeoff in sensitivity is inherent in the use of a collimator, and modern preclinical single photon emission computed tomography (SPECT) systems detect a very small fraction of emitted gamma rays, often less than 0.1%. A system for small animal SPECT imaging which uses no collimators could potentially achieve very high sensitivity-several tens of percent-with reasonably sized detectors. This would allow two significant improvements in preclinical studies: images could be obtained more rapidly, allowing higher throughput for screening applications, or for dynamic processes to be observed with very good time resolution; and images could be obtained with less radioactive tracer, making possible the in vivo imaging of low-capacity receptor systems, aiding research into new tracer compounds, and reducing the cost and easing the regulatory burden of an experiment. Of course, a system with no collimator will not be able to approach the submillimeter spatial resolutions produced by the most advanced pinhole and collimated systems, but a high-sensitivity system with resolution of order 1 cm could nonetheless find significant and new use in the many molecular imaging applications which do not require good spatial resolution-for example, screening applications for drug development or new imaging agents. Rather than as an alternative to high-resolution SPECT systems, the high-sensitivity system is proposed as a radiotracer alternative to optical imaging for small animals. We have developed a prototype system for mouse imaging applications. The scanner consists of two large, thin, closely spaced scintillation detectors. Simulation studies indicate that a FWHM spatial resolution of 7 mm is possible. In an in vivo mouse imaging study using the (99m)Tc labeled tracer MAG-3, the sensitivity of the system is measured to be 40%. Simple projection images created by analytically combining the two detectors' data show sufficient resolution to observe the dynamic distribution of the radiotracer in the mouse. PMID:19190360

Mitchell, Gregory S; Cherry, Simon R

2009-03-01

378

A high-sensitivity small animal SPECT system  

NASA Astrophysics Data System (ADS)

Medical imaging using single gamma-ray-emitting radionuclides typically makes use of parallel hole collimators or pinholes in order to achieve good spatial resolution. However, a tradeoff in sensitivity is inherent in the use of a collimator, and modern preclinical single photon emission computed tomography (SPECT) systems detect a very small fraction of emitted gamma rays, often less than 0.1%. A system for small animal SPECT imaging which uses no collimators could potentially achieve very high sensitivity—several tens of percent—with reasonably sized detectors. This would allow two significant improvements in preclinical studies: images could be obtained more rapidly, allowing higher throughput for screening applications, or for dynamic processes to be observed with very good time resolution; and images could be obtained with less radioactive tracer, making possible the in vivo imaging of low-capacity receptor systems, aiding research into new tracer compounds, and reducing the cost and easing the regulatory burden of an experiment. Of course, a system with no collimator will not be able to approach the submillimeter spatial resolutions produced by the most advanced pinhole and collimated systems, but a high-sensitivity system with resolution of order 1 cm could nonetheless find significant and new use in the many molecular imaging applications which do not require good spatial resolution—for example, screening applications for drug development or new imaging agents. Rather than as an alternative to high-resolution SPECT systems, the high-sensitivity system is proposed as a radiotracer alternative to optical imaging for small animals. We have developed a prototype system for mouse imaging applications. The scanner consists of two large, thin, closely spaced scintillation detectors. Simulation studies indicate that a FWHM spatial resolution of 7 mm is possible. In an in vivo mouse imaging study using the 99mTc labeled tracer MAG-3, the sensitivity of the system is measured to be 40%. Simple projection images created by analytically combining the two detectors' data show sufficient resolution to observe the dynamic distribution of the radiotracer in the mouse.

Mitchell, Gregory S.; Cherry, Simon R.

2009-03-01

379

Limitation to Communication of Fermionic System in Accelerated Frame  

NASA Astrophysics Data System (ADS)

In this article, we investigate communication between an inertial observer and an accelerated observer, sharing fermionic system, when they use classical and quantum communication using single rail or dual rail encoding. The purpose of this work is to understand the limit to the communication between an inertial observer and an accelerated observer, with single rail or dual rail encoding of fermionic system. We observe that at the infinite acceleration, the coherent information of single(or double) rail quantum channel vanishes, but those of classical ones may have finite values. In addition, we see that even when considering a method beyond the single-mode approximation, for the communication between Alice and Bob, the dual rail entangled state seems to provide better information transfer than the single rail entangled state, when we take a fixed choice of the Unruh mode. Moreover, we find that the single-mode approximation may not be sufficient to analyze communication of fermionic system in an accelerated frame.

Chang, Jinho; Kwon, Younghun

2015-03-01

380

Limitation to Communication of Fermionic System in Accelerated Frame  

NASA Astrophysics Data System (ADS)

In this article, we investigate communication between an inertial observer and an accelerated observer, sharing fermionic system, when they use classical and quantum communication using single rail or dual rail encoding. The purpose of this work is to understand the limit to the communication between an inertial observer and an accelerated observer, with single rail or dual rail encoding of fermionic system. We observe that at the infinite acceleration, the coherent information of single(or double) rail quantum channel vanishes, but those of classical ones may have finite values. In addition, we see that even when considering a method beyond the single-mode approximation, for the communication between Alice and Bob, the dual rail entangled state seems to provide better information transfer than the single rail entangled state, when we take a fixed choice of the Unruh mode. Moreover, we find that the single-mode approximation may not be sufficient to analyze communication of fermionic system in an accelerated frame.

Chang, Jinho; Kwon, Younghun

2014-09-01

381

[Animals (Animalia) in system of organisms. 2. Phylogenetic understanding of animals].  

PubMed

The development of systematics in last decade has shown that typological classifications of five-six Kingdoms is not adequate for describing the diversity of organisms. Information from the sequences of small subunit rRNA is not sufficient to reconstruct the position of eukaryotes on the phylogenetic tree due to the effect of long branches. Totally new reconstruction of eukaryotic phylogeny was built upon the analysis of many new molecular markers. Evolution of eukaryotes had two mainstreams. One has been connected with diversification of ancestral biciliate forms (Bikonta). Sister-group of Bikonta (Unikonta) includes some originally uniciliate amoebae and moulds (Amoebozoa), and uniciliate eukaryotes with posterior cilium (Opisthokonta). The taxon Opisthokonta unites Fungi, Nuclearimorpha, Mesomycetozoa, Choanozoa and Metazoa. The latter three groups or only Metazoa are attributes to animals. The following differentiation of the groups used in systematic for the description of diversity of organisms is proposed. (1) Taxon is a group which is defined on the basis of ancestry: taxon includes all species descended from one ancestor. Taxon differs from logic classes of typology at an ontologic level. Taxon arises and exists, and its composition and occupied niches can constantly change; taxon can flourish or, on the contrary, fade up to full disappearance. Thus, the predicative characteristic of taxon, including characters which are considered significant, are not absolute. It is significant only at the moment of consideration. But characters (synapomorphies) are important as the practical tool for discerning taxa at given time period. Taxa unite species into unique classification. This understanding of taxon corresponds to monophyletic group sensu Willi Hennig. (2) Class of organisms is a group which is defined on the basis of characters: class includes all species having the given character. The class is only a logic object. Unlike taxa grouping species into classes may be through different and crossed classifications. Inside the given category of groups it is possible to distinguish: (2.1) Level of the organization (grade) described by the differences on the levels of organization: for example prokaryotic and eukaryotic levels of the organization. Eukaryotes can be divided into unicellular (Protoctista, Protista) and multicelluar (tissue-specific-Histonia) forms. (2.2) Types of the organization distinguishing groups of one level: for example, amoedoid type (Sarcodina), naked (Gymnamoebia), and testate (Testacea) amoebas. (2.3) Taxonomic groups as set-theoretical approximations of taxa. (2.4) Groups of the mixed nature. For example, Haeckel has recognized Protophyta and Protozoa describing the unicellular level of the organization inside plants and animals accordingly. Protozoa in Cavalier-Smith's system (2002, 2004) is also an example of groups of the mixed nature. PMID:16245570

Shatalkin, A I

2005-01-01

382

Impedance matching techniques for ethernet communication systems  

E-print Network

In modern local area networks, the communication signals sent from one computer to another across the lines of transmission are degraded because of reflection at the receiver. This reflection can be characterized through the impedances...

Kamprath, Richard Alan

2007-09-17

383

Measuring long-term location privacy in vehicular communication systems  

Microsoft Academic Search

Vehicular communication systems are an emerging form of communication that enables new ways of cooperation among vehicles, traffic operators, and service providers. However, many vehicular applications rely on continuous and detailed location information of the vehicles, which has the potential to infringe the users’ location privacy. A multitude of privacy-protection mechanisms have been proposed in recent years. However, few efforts

Zhendong Ma; Frank Kargl; Michael Weber

2010-01-01

384

Study and design on USB wireless laser communication system  

Microsoft Academic Search

We give the definition of USB wireless laser communication system (WLCS) and the brief introduction to the protocol of USB, the standard of hardware is also given. The paper analyses the hardware and software of USB WLCS. Wireless laser communication part and USB interface circuit part are discussed in detail. We also give the periphery design of the chip AN2131Q,

Aihua Wang; Jiansheng Zheng; Yong Ai

2004-01-01

385

Satellite communications systems and technology. Volume 2; Site Reports  

NASA Technical Reports Server (NTRS)

Volume 2 of the final report of the NASA/NSF Panel on Satellite Communications Systems and Technology is presented. It consists of the site reports from the panel's visits to satellite communications facilities and laboratories in Europe, Japan, and Russia.

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

1993-01-01

386

An Experimental Study of the Emergence of Human Communication Systems  

ERIC Educational Resources Information Center

The emergence of human communication systems is typically investigated via 2 approaches with complementary strengths and weaknesses: naturalistic studies and computer simulations. This study was conducted with a method that combines these approaches. Pairs of participants played video games requiring communication. Members of a pair were…

Galantucci, Bruno

2005-01-01

387

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

388

The mobile radio extension of the SOTRIN Area Communication System  

Microsoft Academic Search

The concept of the SOTRIN SCRA (single-channel radio access), the mobile radio extension of the SOTRIN Area Communication System that is fully compliant with EUROCOM specifications, is described. IT provides full duplex VHF radio communications to mobile users, with TRANSEC and COMSEC protection, offering the same numbering scheme and services as for the static subscribers. The SCRA can also work

Angelo BRIGANTE; Giovanni GUIDOTTI

1992-01-01

389

Safety guaranteeing method & tool development in railway communication system  

Microsoft Academic Search

Safety-critical systems related to the railway communications are currently undergoing changes. Mechanical and electro-mechanical devices are being replaced by programmable electronics that are often controlled remotely via communication networks. Therefore designers and operators now not only have to contend with component failures and user errors, but also with the possibility that malicious entities are seeking to disrupt the services provided

Hyun-Jeong Jo; Jong-Gyu Hwang; Seung-Kwon Shin; Yong-Kyu Kim

2009-01-01

390

Adaptive Beamforming in Mobile, Massively Multiuser Satellite Communications: A System  

E-print Network

Adaptive Beamforming in Mobile, Massively Multiuser Satellite Communications: A System Perspective Xiao Lei, Laura Cottatellucci, Samah A. M. Ghanem Mobile Communications Department, Eurecom, France Email: {xiao.lei; laura.cottatellucci; samah.ghanem}@eurecom.fr Abstract--We consider a Mobile Satellite

Gesbert, David

391

Communication satellite system beyond the year 2000  

NASA Astrophysics Data System (ADS)

The primary evolutionary factors of satellite communications technologies are reviewed based on the results of a study of novel satellite developments. A critical evaluation of the viability and availability of the technologies is utilized in conjunction with market forecasts to determine promising commercial strategies. Modern technologies are almost prepared for the development of a class of communications satellites and include bandwidth utilization, spacecraft bus modularity, and functional integration.

Robertson, G. J.; Fourquet, J. M.

1991-10-01

392

Transport System Architectures for High-Performance Communications Subsystems  

Microsoft Academic Search

Providing end-to-end gigabit communication support for bandwidth-intensive distributed applications requires h igh- performance transport systems. This paper describes and classifies transport system mechanisms that integrate oper - ating system resources (such as CPU(s), virtual memory, and network adapters) together with communication pro- tocols (such as TCP\\/IP and XTP) to support applications running on local and wide area networks. A taxonomy

Douglas C. Schmidt; Tatsuya Suda

1993-01-01

393

Secure electronic commerce communication system based on CA  

NASA Astrophysics Data System (ADS)

In this paper, we introduce the situation of electronic commercial security, then we analyze the working process and security for SSL protocol. At last, we propose a secure electronic commerce communication system based on CA. The system provide secure services such as encryption, integer, peer authentication and non-repudiation for application layer communication software of browser clients' and web server. The system can implement automatic allocation and united management of key through setting up the CA in the network.

Chen, Deyun; Zhang, Junfeng; Pei, Shujun

2001-07-01

394

Safety Monitoring System by Autonomous Mobile Sensors Utilizing Pheromone Communication  

Microsoft Academic Search

Highly reliable safety monitoring systems are indispensable for operating large-scale systems, such as nuclear power plants. This paper proposes anew type of reliable safety monitoring system employing a small number of autonomous decentralized mobile sensors. The new system is called ant-like sensor system (ALSS), and consists of autonomous sensors utilizing pheromone communication. Each sensor moves around, leaving the markings of

Kenji Tanaka; Yo Ishigaki; Hiroyulu Inoue; Makoto Itoh

2005-01-01

395

A satellite system for land-mobile communications in Europe  

NASA Technical Reports Server (NTRS)

There exists a great unsatisified demand for land mobile communications in Europe, particularly in sectors of business activity such as the road transport industry. This demand could best be satisfied by means of satellite-based private networks providing voice and data communications in a hub configuration. The potential market is estimated to encompass several hundred thousand road vehicles and the transmission capacity required would be several thousand channels. ESA is currently demonstrating the potential of satellite communications for this type of application, using a system called PRODAT. System studies are being performed with the aim of defining the architecture of a regional satellite system for Europe.

Bartholome, P.; Rogard, R.

1988-01-01

396

High capacity satellite communication system and key technologies  

NASA Astrophysics Data System (ADS)

A high-capacity satellite communication system for Japan, with multiple beams and key technologies for onboard equipment, is described. The system will provide trunk transmission, digital business communication, and mobile communication. Advantages of the multibeam system include increased transmission capacity, reduction in earth-station antenna diameter, and frequency reuse. Onboard technologies discussed include cluster-feed horn design, reflector deployment, antenna pointing control (accurate to 0.015 degree with 0.3-degree spot width for the 12 beams), satellite switch, and onboard receiver and transmitter.

Nagai, Y.; Okasaka, S.; Nakagawa, K.

397

ATCOM: Automatically Tuned Collective Communication System for SMP Clusters  

SciTech Connect

Conventional implementations of collective communications are based on point-to-point communications, and their optimizations have been focused on efficiency of those communication algorithms. However, point-to-point communications are not the optimal choice for modern computing clusters of SMPs due to their two-level communication structure. In recent years, a few research efforts have investigated efficient collective communications for SMP clusters. This dissertation is focused on platform-independent algorithms and implementations in this area. There are two main approaches to implementing efficient collective communications for clusters of SMPs: using shared memory operations for intra-node communications, and overlapping inter-node/intra-node communications. The former fully utilizes the hardware based shared memory of an SMP, and the latter takes advantage of the inherent hierarchy of the communications within a cluster of SMPs. Previous studies focused on clusters of SMP from certain vendors. However, the previously proposed methods are not portable to other systems. Because the performance optimization issue is very complicated and the developing process is very time consuming, it is highly desired to have self-tuning, platform-independent implementations. As proven in this dissertation, such an implementation can significantly out-perform the other point-to-point based portable implementations and some platform-specific implementations. The dissertation describes in detail the architecture of the platform-independent implementation. There are four system components: shared memory-based collective communications, overlapping mechanisms for inter-node and intra-node communications, a prediction-based tuning module and a micro-benchmark based tuning module. Each component is carefully designed with the goal of automatic tuning in mind.

Meng-Shiou Wu

2005-12-17

398

Integrated system of white LED visible-light communication and power-line communication  

Microsoft Academic Search

White LED offers advantageous properties such as high brightness, reliability, lower power consumption and long lifetime. Indoor optical wireless communication systems employing white LED lighting have been proposed. This system will enable high quality of service by the high radiation power from this lighting equipment. And, this system does not cause or suffer from radio or electromagnetic interference. But, it

Toshihiko Komine; Masao Nakagawa

2003-01-01

399

A Systems Approach to Scaffold Communication Skills Development  

PubMed Central

Objectives To implement a communication skills development (CSD) system and evaluate its effectiveness in a clinical communications course. Design Students conducted baseline interviews and wrote SOAP notes, and based on faculty, patient, self- and peer assessments, set goals for improvement of their communication skills. Students participated in various activities to scaffold their learning, several of which took place in a web-based environment to enhance access and function for both students and faculty members. Quantitative and qualitative analyses were performed. Assessment Students' communication skills improved as evidenced by assessment scores. Student and faculty comments offered additional evidence of the effectiveness of standardized patient interviews, learning strategies, and assessment methods. Conclusion The CSD system effectively integrated various types of learning activities and feedback processes. The use of scaffolding strategies appeared to enhance the development of students' communication skills. PMID:18483601

Er, Nelson L.

2008-01-01

400

Towards communication network development (structural systems issues, combinatorial models)  

Microsoft Academic Search

This paper focuses on systems development issues (i.e., improvement, extension) for composite (modular) systems. First, systems approaches are considered: (a) improvement of systems components and\\/or their interconnections, (b) improvement\\/extension of a system structure, (c) “space” (e.g., geographical) extension of a system as designing an additional system part, and (d) combined system improvement\\/extension. Communication networks are examined as a basic applied

M. S. Levin; Russian Acad

2010-01-01

401

Engineering multicellular systems by cell-cell communication  

PubMed Central

Synthetic biology encompasses the design of new biological parts and systems as well as the modulation of existing biological networks to generate novel functions. In recent years, increasing emphasis has been placed on the engineering of population-level behaviors using cell-cell communication. From the engineering perspective, cell-cell communication serves as a versatile regulatory module that enables coordination among cells in and between populations and facilitates the generation of reliable dynamics. In addition to exploring biological “design principles” via the construction of increasingly complex dynamics, communication-based synthetic systems can be used as well-defined model systems to study ecological and social interactions such as competition, cooperation and predation. Here we discuss the dynamic properties of cell-cell communication modules, how they can be engineered for synthetic circuit design, and applications of these systems. PMID:19733047

Pai, Anand; Tanouchi, Yu; Collins, Cynthia; You, Lingchong

2009-01-01

402

Predictive Compensation for Communication Outages in Networked Control Systems  

E-print Network

Predictive Compensation for Communication Outages in Networked Control Systems Erik Henriksson if the current is lost) are special cases of the more general compensation scheme presented. The predictive Henrik Sandberg Karl Henrik Johansson Abstract-- A predictive outage compensator co

Johansson, Karl Henrik

403

Studying Gestures: The Iconic Roots of Human Communication Systems   

E-print Network

This paper tests the hypothesis that the iconicity inherent in human gestures can be a key element in the creation and evolution of communication systems. An interactive experiment based on playing charades was conducted modelling a situation where...

Ioannou, Charis

2011-11-23

404

80. Survivable lowfrequency communications system receiver, teletypewriter set, radio, teleprinter, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

80. Survivable low-frequency communications system receiver, teletypewriter set, radio, teleprinter, south side - Ellsworth Air Force Base, Delta Flight, Launch Control Facility, County Road CS23A, North of Exit 127, Interior, Jackson County, SD

405

Communication Support System in Emergency Considering Dynamic Connection of Organization  

NASA Astrophysics Data System (ADS)

It is frequently observed in emergent situation that important information does not reach to an right person or department in the organization because of the confusion after the emergency or in some case because of lack of knowledge on contact address. This phenomenon happens especially when different organizations are connected dynamically in emergency and it is very important to support communication in emergent situations. This paper deals with a communication support system considering dynamic organizational connection in emergency. The system is based on the communication model that considers human related factors such as “competence", “duty", “responsibility" and “knowledge" in organization. On the basis of the model, a communication support system to give contact address depending on the situation is designed and a prototype system with GUI is developed.

Morimoto, Yasumasa; Nakatani, Mie; Nishida, Shogo

406

Circuit-aware system design techniques for wireless communication  

E-print Network

When designing wireless communication systems, many hardware details are hidden from the algorithm designer, especially with analog hardware. While it is difficult for a designer to understand all aspects of a complex ...

Huang, Everest W. (Everest Wang)

2006-01-01

407

7. Survivable low frequency communication system pathway, looking east ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. Survivable low frequency communication system pathway, looking east - Ellsworth Air Force Base, Delta Flight, Launch Control Facility, County Road CS23A, North of Exit 127, Interior, Jackson County, SD

408

21 CFR 892.2050 - Picture archiving and communications system.  

Code of Federal Regulations, 2013 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.2050 Picture archiving and communications system. (a)...

2013-04-01

409

21 CFR 892.2050 - Picture archiving and communications system.  

Code of Federal Regulations, 2012 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.2050 Picture archiving and communications system. (a)...

2012-04-01

410

21 CFR 892.2050 - Picture archiving and communications system.  

Code of Federal Regulations, 2014 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES RADIOLOGY DEVICES Diagnostic Devices § 892.2050 Picture archiving and communications system. (a)...

2014-04-01

411

Simulation of models and algorithms for wireless communication systems  

E-print Network

The thesis presents a set of simulations of models and algorithms for wireless communication systems. The simulations are developed using graphical MATLAB interfaces, and cover the fundamentals of wireless channel modeling, ...

Jabbour, Imad W

2007-01-01

412

46 CFR 184.602 - Internal communications systems.  

Code of Federal Regulations, 2010 CFR

...the location where the means of controlling the propulsion machinery, required by § 184.620(a) of this part, is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2010-10-01

413

46 CFR 121.602 - Internal communications systems.  

Code of Federal Regulations, 2014 CFR

...station to the location where the means of controlling the propulsion machinery, required by § 121.620(a), is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2014-10-01

414

46 CFR 184.602 - Internal communications systems.  

Code of Federal Regulations, 2014 CFR

...the location where the means of controlling the propulsion machinery, required by § 184.620(a) of this part, is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2014-10-01

415

46 CFR 121.602 - Internal communications systems.  

Code of Federal Regulations, 2010 CFR

...station to the location where the means of controlling the propulsion machinery, required by § 121.620(a), is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2010-10-01

416

46 CFR 121.602 - Internal communications systems.  

Code of Federal Regulations, 2013 CFR

...station to the location where the means of controlling the propulsion machinery, required by § 121.620(a), is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2013-10-01

417

46 CFR 184.602 - Internal communications systems.  

Code of Federal Regulations, 2013 CFR

...the location where the means of controlling the propulsion machinery, required by § 184.620(a) of this part, is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2013-10-01

418

46 CFR 121.602 - Internal communications systems.  

Code of Federal Regulations, 2011 CFR

...station to the location where the means of controlling the propulsion machinery, required by § 121.620(a), is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2011-10-01

419

46 CFR 184.602 - Internal communications systems.  

Code of Federal Regulations, 2012 CFR

...the location where the means of controlling the propulsion machinery, required by § 184.620(a) of this part, is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2012-10-01

420

46 CFR 121.602 - Internal communications systems.  

Code of Federal Regulations, 2012 CFR

...station to the location where the means of controlling the propulsion machinery, required by § 121.620(a), is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2012-10-01

421

46 CFR 184.602 - Internal communications systems.  

Code of Federal Regulations, 2011 CFR

...the location where the means of controlling the propulsion machinery, required by § 184.620(a) of this part, is located. Twin screw vessels with pilothouse control for both engines are not required to have a fixed communications system. (b)...

2011-10-01

422

A simple integrated system for electrophysiologic recordings in animals  

PubMed Central

This technical note describes a modification to a fundus camera that permits simultaneous recording of pattern electroretinograms (pERGs) and pattern visual evoked potentials (pVEPs). The modification consists of placing an organic light-emitting diode (OLED) in the split-viewer pathway of a fundus camera, in a plane conjugate to the subject’s pupil. In this way, a focused image of the OLED can be delivered to a precisely known location on the retina. The advantage of using an OLED is that it can achieve high luminance while maintaining high contrast, and with minimal degradation over time. This system is particularly useful for animal studies, especially when precise retinal positioning is required. PMID:19137347

Slater, Bernard J.; Miller, Neil R.; Bernstein, Steven L.; Flower, Robert W.

2009-01-01

423

Communication integrity for slow-dynamic critical embedded systems  

E-print Network

Communication integrity for slow-dynamic critical embedded systems Amira Zammali (1),(2) (1) CNRS codes and targets slow-dynamic critical embedded systems. The novelty of this approach lies in the fact to the usual use of one unique control function. Keywords--slow-dynamic systems, critical embedded systems

Paris-Sud XI, Université de

424

Dreamweaver and Flash: Strategies for Updating Communication Systems Instruction  

ERIC Educational Resources Information Center

The rate of innovation and change impacting technology education communication systems instruction has been vigorous for longer than most people can remember. Trends have included analog systems being replaced by digital systems, integration of networks and system devices, computerization, optical storage, and wireless transmission of data. The…

Hill, Roger B.

2004-01-01

425

Applications of a global small animal tracking system Songbird movements as an example  

E-print Network

.02629 Commentary Going wild: what a global small-animal tracking system could do for experimental181 Applications of a global small animal tracking system Songbird movements as an example Imagine, 1989). Queleas can migrate long distances, sometimes more Tracking animals over large temporal

Thorup, Kasper

426

A system for analysis and classification of voice communications  

NASA Technical Reports Server (NTRS)

A method for analysis and classification of verbal communications typically associated with manned space missions or simulations was developed. The study was carried out in two phases. Phase 1 was devoted to identification of crew tasks and activities which require voice communication for accomplishment or reporting. Phase 2 entailed development of a message classification system and a preliminary test of its feasibility. The classification system permits voice communications to be analyzed to three progressively more specific levels of detail and to be described in terms of message content, purpose, and the participants in the information exchange. A coding technique was devised to allow messages to be recorded by an eight-digit number.

Older, H. J.; Jenney, L. L.; Garland, L.

1973-01-01

427

Validation of the communications link analysis and simulation system (CLASS)  

NASA Technical Reports Server (NTRS)

CLASS (Communication Link Analysis and Simulation System) is a software package developed for NASA to predict the communication and tracking performance of the Tracking and Data Relay Satellite System (TDRSS) services. The methods used to verify CLASS are described. The usefulness of a software tool such as CLASS depends strongly on the reliability and accuracy of the results it produces. For this reason, considerable attention was paid to validation throughout the CLASS development.

Braun, W. R.; Mckenzie, T. M.

1985-01-01

428

Communications protocol for RF-based indoor wireless localization systems  

Microsoft Academic Search

A novel application-specific communications scheme for RF-based indoor wireless localization networks is proposed. In such a system wireless badges, attached to people or objects, report positions to wireless router units. Badges have very limited communication, energy, and processing capabilities. Routers are responsible for propagating collected badge information hop-by-hop toward one central unit of the system and are significantly less constrained

Tamas Kasza; Mehdi M. Shahsavari; Veton Kepuska; Maria Pinzone

2006-01-01

429

Animation of multi-flexible body systems and its use in control system design  

NASA Technical Reports Server (NTRS)

Animation can greatly assist the structural dynamicist and control system analyst with better understanding of how multi-flexible body systems behave. For multi-flexible body systems, the structural characteristics (mode frequencies, mode shapes, and damping) change, sometimes dramatically with large angles of rotation between bodies. With computer animation, the analyst can visualize these changes and how the system responds to active control forces and torques. A characterization of the type of system we wish to animate is presented. The lack of clear understanding of the above effects was a key element leading to the development of a multi-flexible body animation software package. The resulting animation software is described in some detail here, followed by its application to the control system analyst. Other applications of this software can be determined on an individual need basis. A number of software products are currently available that make the high-speed rendering of rigid body mechanical system simulation possible. However, such options are not available for use in rendering flexible body mechanical system simulations. The desire for a high-speed flexible body visualization tool led to the development of the Flexible Or Rigid Mechanical System (FORMS) software. This software was developed at the Center for Simulation and Design Optimization of Mechanical Systems at the University of Iowa. FORMS provides interactive high-speed rendering of flexible and/or rigid body mechanical system simulations, and combines geometry and motion information to produce animated output. FORMS is designed to be both portable and flexible, and supports a number of different user interfaces and graphical display devices. Additional features have been added to FORMS that allow special visualization results related to the nature of the flexible body geometric representations.

Juengst, Carl; Stahlberg, Ron

1993-01-01

430

26 CFR 49.4253-9 - Exemption for certain interior communication systems.  

Code of Federal Regulations, 2013 CFR

... Exemption for certain interior communication systems. 49.4253-9 Section...FACILITIES AND SERVICES EXCISE TAXES Communications § 49.4253-9 Exemption for certain interior communication systems. (a) In...

2013-04-01

431

47 CFR 11.47 - Optional use of other communications methods and systems.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Optional use of other communications methods and systems. 11.47 ...47 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL EMERGENCY ALERT... § 11.47 Optional use of other communications methods and systems. (a)...

2010-10-01

432

47 CFR 11.47 - Optional use of other communications methods and systems.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Optional use of other communications methods and systems. 11.47 ...47 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL EMERGENCY ALERT... § 11.47 Optional use of other communications methods and systems. (a)...

2013-10-01

433

26 CFR 49.4253-9 - Exemption for certain interior communication systems.  

Code of Federal Regulations, 2011 CFR

... Exemption for certain interior communication systems. 49.4253-9 Section...FACILITIES AND SERVICES EXCISE TAXES Communications § 49.4253-9 Exemption for certain interior communication systems. (a) In...

2011-04-01

434

26 CFR 49.4253-9 - Exemption for certain interior communication systems.  

Code of Federal Regulations, 2010 CFR

... Exemption for certain interior communication systems. 49.4253-9 Section...FACILITIES AND SERVICES EXCISE TAXES Communications § 49.4253-9 Exemption for certain interior communication systems. (a) In...

2010-04-01

435

26 CFR 49.4253-9 - Exemption for certain interior communication systems.  

Code of Federal Regulations, 2012 CFR

... Exemption for certain interior communication systems. 49.4253-9 Section...FACILITIES AND SERVICES EXCISE TAXES Communications § 49.4253-9 Exemption for certain interior communication systems. (a) In...

2012-04-01

436

47 CFR 11.47 - Optional use of other communications methods and systems.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false Optional use of other communications methods and systems. 11.47 ...47 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL EMERGENCY ALERT... § 11.47 Optional use of other communications methods and systems. (a)...

2014-10-01

437

47 CFR 11.47 - Optional use of other communications methods and systems.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Optional use of other communications methods and systems. 11.47 ...47 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL EMERGENCY ALERT... § 11.47 Optional use of other communications methods and systems. (a)...

2012-10-01

438

47 CFR 11.47 - Optional use of other communications methods and systems.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Optional use of other communications methods and systems. 11.47 ...47 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL EMERGENCY ALERT... § 11.47 Optional use of other communications methods and systems. (a)...

2011-10-01

439

40 CFR 264.34 - Access to communications or alarm system.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Access to communications or alarm system. 264... § 264.34 Access to communications or alarm system. ...immediate access to an internal alarm or emergency communication device, either...

2010-07-01

440

40 CFR 265.34 - Access to communications or alarm system.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Access to communications or alarm system. 265... § 265.34 Access to communications or alarm system. ...immediate access to an internal alarm or emergency communication device, either...

2010-07-01

441

An all digital low data rate communication system  

NASA Technical Reports Server (NTRS)

The advent of digital hardwares has made it feasible to implement many communication system components digitally. With the exception of frequency down conversion, the proposed low data rate communication system uses digital hardwares completely. Although the system is designed primarily for deep space communications with large frequency uncertainty and low signal-to-noise ratio, it is also suitable for other low data rate applications with time-shared operation among a number of channels. Emphasis is placed on the fast Fourier transform receiver and the automatic frequency control via digital filtering. The speed available from the digital system allows sophisticated signal processing to reduce frequency uncertainty and to increase the signal-to-noise ratio. The practical limitations of the system such as the finite register length are examined. It is concluded that the proposed all-digital system is not only technically feasible but also has potential cost reduction over the existing receiving systems.

Chen, C.; Fan, M.

1973-01-01

442

Animals, Animals, Animals  

NSDL National Science Digital Library

Third grade students may use this page for additional resources for their animal research. Use these links as part of your animal research: Desert Biome What Swims Beneath: Creatures of the Sea Scaly Surprises (ScienceWorld) Manatees AnimalPlanet.com: Mammal Guide Endangered Species Picture Book MIKIDS!: Mammals ZOOM MAMMALS - EnchantedLearning.com Smithsonian National Zoological Park Enchanted Learning: Zoom Sharks Shark School Sharks: Did You Know? Sharks: Myth and Mystery The Secret World of Sharks and Rays ...

Mrs. Laz

2006-12-16

443

Communications of the Association for Information Systems  

E-print Network

and the individual levels, a lack of theoretical explanation of why and how social capital changes due to ICT and the individual levels, a lack of theoretical explanation of why and how social capital changes due to ICT and Communications Technology Research: Past, Present, and Future 184 Volume 25 Article 23 I. INTRODUCTION Social

Kurnia, Sherah

444

Modelling the heart as a communication system.  

PubMed

Electrical communication between cardiomyocytes can be perturbed during arrhythmia, but these perturbations are not captured by conventional electrocardiographic metrics. We developed a theoretical framework to quantify electrical communication using information theory metrics in two-dimensional cell lattice models of cardiac excitation propagation. The time series generated by each cell was coarse-grained to 1 when excited or 0 when resting. The Shannon entropy for each cell was calculated from the time series during four clinically important heart rhythms: normal heartbeat, anatomical reentry, spiral reentry and multiple reentry. We also used mutual information to perform spatial profiling of communication during these cardiac arrhythmias. We found that information sharing between cells was spatially heterogeneous. In addition, cardiac arrhythmia significantly impacted information sharing within the heart. Entropy localized the path of the drifting core of spiral reentry, which could be an optimal target of therapeutic ablation. We conclude that information theory metrics can quantitatively assess electrical communication among cardiomyocytes. The traditional concept of the heart as a functional syncytium sharing electrical information cannot predict altered entropy and information sharing during complex arrhythmia. Information theory metrics may find clinical application in the identification of rhythm-specific treatments which are currently unmet by traditional electrocardiographic techniques. PMID:25740854

Ashikaga, Hiroshi; Aguilar-Rodríguez, José; Gorsky, Shai; Lusczek, Elizabeth; Marquitti, Flávia Maria Darcie; Thompson, Brian; Wu, Degang; Garland, Joshua

2015-04-01

445

Communicating and Mobile Systems: The ?-calculus  

Microsoft Academic Search

The pi-calculus differs from other models of communicating behaviour mainly in its treatment of mobility. The movement of a piece of data inside a computer program is treated exactly the same as the transfer of a message - or indeed an entire computer program - across the internet. One can also describe networks which reconfigure themselves. The calculus is very

Robin Milner

1999-01-01

446

Consumer electronics bus, a robust communications system  

Microsoft Academic Search

The Electronic Industries Association (EIA) is completing its consumer electronics bus (CEBus) standard to establish a common communication network through which any consumer electronics devices may exchange control information and data. The authors present some of the unique problems and solutions encountered by the committee in designing the CEBus protocol

B. Markwalter; C. Russell

1988-01-01

447

Specifying Communication in Distributed Information Systems #  

E-print Network

­level logic. The latter corresponds with concepts incorporated in Troll3, a specification language research into a commercial product [Esp93]. In the academic realm, there are several related developments: Troll [JSHS96, HJ]. In the Oblog family, Troll3 [DH97] is the first to address problems of concurrency and communication

Lisboa, Universidade Técnica de

448

Televote; A New Civic Communication System.  

ERIC Educational Resources Information Center

A new method of rapid low-cost communication between government officials and citizens is proposed and outlined. Relevant facts and opposing views on an issue are sent to citizens, who then have a week to express their opinions by dialing a special televoter number which is different for every citizen. Votes are then counted by computer, and…

Campbell, Vincent; Santos, Janet

449

Communication-Garden System: Visualizing a computer-mediated communication process  

Microsoft Academic Search

Archives of computer-mediated communication (CMC) could be valuable organizational resources. Most CMC archive systems focus on presenting one of the three aspects of a CMC community: discussion content, participants' behavior, or social networks among participants. Very few CMC archive systems support the easy integration of these three aspects. This paper thus describes two-phase research to propose an automatic approach that

Bin Zhu; Hsinchun Chen

2008-01-01

450

Methods for operating parallel computing systems employing sequenced communications  

DOEpatents

A parallel computing system and method are disclosed having improved performance where a program is concurrently run on a plurality of nodes for reducing total processing time, each node having a processor, a memory, and a predetermined number of communication channels connected to the node and independently connected directly to other nodes. The present invention improves performance of the parallel computing system by providing a system which can provide efficient communication between the processors and between the system and input and output devices. A method is also disclosed which can locate defective nodes with the computing system. 15 figs.

Benner, R.E.; Gustafson, J.L.; Montry, G.R.

1999-08-10

451

A Study of Synchronization Techniques for Optical Communication Systems  

NASA Technical Reports Server (NTRS)

The study of synchronization techniques and related topics in the design of high data rate, deep space, optical communication systems was reported. Data cover: (1) effects of timing errors in narrow pulsed digital optical systems, (2) accuracy of microwave timing systems operating in low powered optical systems, (3) development of improved tracking systems for the optical channel and determination of their tracking performance, (4) development of usable photodetector mathematical models for application to analysis and performance design in communication receivers, and (5) study application of multi-level block encoding to optical transmission of digital data.

Gagliardi, R. M.

1975-01-01

452

Methods for operating parallel computing systems employing sequenced communications  

DOEpatents

A parallel computing system and method having improved performance where a program is concurrently run on a plurality of nodes for reducing total processing time, each node having a processor, a memory, and a predetermined number of communication channels connected to the node and independently connected directly to other nodes. The present invention improves performance of performance of the parallel computing system by providing a system which can provide efficient communication between the processors and between the system and input and output devices. A method is also disclosed which can locate defective nodes with the computing system.

Benner, Robert E. (Albuquerque, NM); Gustafson, John L. (Albuquerque, NM); Montry, Gary R. (Albuquerque, NM)

1999-01-01

453

Estimation of the demand for public services communications. [market research and economic analysis for a communications satellite system  

NASA Technical Reports Server (NTRS)

Market analyses and economic studies are presented to support NASA planning for a communications satellite system to provide public services in health, education, mobile communications, data transfer, and teleconferencing.

1976-01-01

454

Laser Communication Demonstration System (LCDS) and future mobile satellite services  

NASA Technical Reports Server (NTRS)

The Laser Communications Demonstration System (LCDS) is a proposed in-orbit demonstration of high data rate laser communications technology conceived jointly by NASA and U.S. industry. The program objectives are to stimulate industry development and to demonstrate the readiness of high data rate optical communications in Earth orbit. For future global satellite communication systems using intersatellite links, laser communications technology can offer reduced mass and power requirements and higher channel bandwidths without regulatory constraints. As currently envisioned, LCDS will consist of one or two orbiting laser communications terminals capable of demonstrating high data rate (greater than 750Mbps) transmission in a dynamic space environment. Two study teams led by Motorola and Ball Aerospace are currently in the process of conducting a Phase A/B mission definition study of LCDS under contracts with JPL/NASA. The studies consist of future application survey, concept and requirements definition, and a point design of the laser communications flight demonstration. It is planned that a single demonstration system will be developed based on the study results. The Phase A/B study is expected to be completed by the coming June, and the current results of the study are presented in this paper.

Chen, Chien-Chung; Wilhelm, Michael D.; Lesh, James R.

1995-01-01

455

DOE Integrated Security System (DISS) preliminary communication security analysis  

SciTech Connect

The purpose of this analysis is to document a technical approach to improve DOE Integrated Security System (DISS) dial-up communications security and the requirements to address them. This document is not intended as a comprehensive analysis of the security aspects of the DISS computer system but rather as an analysis of the dial-up communications security as it pertains to the use of the DISS database in the new DOE Automated Visitors Access Control System (DAVACS) procedures. Current access controls into the DISS will be discussed with emphasis on the DAVACS procedures. Recommendations will be provided for increasing the dial-up communications security into DISS as it relates to the automated visit procedures. Finally a design for an encrypted dial-up communication link to DISS will be given.

Sweeney, D.J.

1993-10-01

456

Integrated communication/environmental controller system for the physically disabled.  

PubMed

A wireless integrated communication/environmental controller system (ICECS) is described, which offers total communication as well as environmental control for the disabled person. The system is flexible and simple enough to be used from the wheelchair by patients with spinal cord injuries. The system has three parts: the mobile unit, the base unit, and a set of remote-control receiver modules. The mobile unit and the base unit are linked together by radio, while the base unit and the remote receiver modules communicate over a power line carrier. The telephone mode allows telephone calls to be placed and received. Different electrical devices are controlled by the environmental control mode. The intercom mode permits two-way communication with an attendant or the nursing station. The modes can be switched simply by pressing a button on the mobile unit. Sixteen soft-touch switches arranged in a 4 X 4 matrix allow operation by hand or mouthstick. PMID:2950838

Fatehi, M T; Balmaseda, M T; Koozekanani, S H

1987-03-01

457

Blood compatible microfluidic system for pharmacokinetic studies in small animals.  

PubMed

New radiotracer developments for nuclear medicine imaging require the analysis of blood as a function of time in small animal models. A microfluidic device was developed to monitor the radioactivity concentration in the blood of rats and mice in real time. The microfluidic technology enables a large capture solid angle and a reduction in the separation distance between the sample and detector, thus increasing the detection efficiency. This in turn allows a reduction of the required detection volume without compromising sensitivity, an important advantage with rodent models having a small total blood volume (a few ml). A robust fabrication process was developed to manufacture the microchannels on top of unpackaged p-i-n photodiodes without altering detector performance. The microchannels were fabricated with KMPR, an epoxy-based photoresist similar to SU-8 but with improved resistance to stress-induced fissuring. Surface passivation of the KMPR enables non-diluted whole blood to flow through the channel for up to 20 min at low speed without clotting. The microfluidic device was embedded in a portable blood counter with dedicated electronics, pumping unit and computer control software for utilisation next to a small animal nuclear imaging scanner. Experimental measurements confirmed model predictions and showed a 4- to 19-fold improvement in detection efficiency over existing catheter-based devices, enabling a commensurate reduction in sampled blood volume. A linear dose-response relationship was demonstrated for radioactivity concentrations typical of experiments with rodents. The system was successfully used to measure the blood input function of rats in real time after radiotracer injection. PMID:23000896

Convert, Laurence; Baril, Frédérique Girard; Boisselle, Vincent; Pratte, Jean-François; Fontaine, Réjean; Lecomte, Roger; Charette, Paul G; Aimez, Vincent

2012-11-21

458

Integrated source and channel encoded digital communication system design study  

NASA Technical Reports Server (NTRS)

The particular Ku-band carrier, PN despreading, and symbol synchronization strategies, which were selected for implementation in the Ku-band transponder aboard the orbiter, were assessed and evaluated from a systems performance viewpoint, verifying that system specifications were met. A study was performed of the design and implementation of tracking techniques which are suitable for incorporation into the Orbiter Ku-band communication system. Emphasis was placed on maximizing tracking accuracy and communication system flexibility while minimizing cost, weight, and system complexity of Orbiter and ground systems hardware. The payload communication study assessed the design and performance of the forward link and return link bent-pipe relay modes for attached and detached payloads. As part of this study, a design for a forward link bent-pipe was proposed which employs a residual carrier but which is tracked by the existing Costas loop.

Alem, W. K.; Huth, G. K.; Simon, M. K.

1978-01-01

459

Systems analysis of the space shuttle. [communication systems, computer systems, and power distribution  

NASA Technical Reports Server (NTRS)

Developments in communications systems, computer systems, and power distribution systems for the space shuttle are described. The use of high speed delta modulation for bit rate compression in the transmission of television signals is discussed. Simultaneous Multiprocessor Organization, an approach to computer organization, is presented. Methods of computer simulation and automatic malfunction detection for the shuttle power distribution system are also described.

Schilling, D. L.; Oh, S. J.; Thau, F.

1975-01-01

460

A 5.8 GHz Local Positioning and Communication System  

Microsoft Academic Search

In this paper, we present a hybrid local positioning and communication system under development within the scope of the EU funded RESOLUTION project. Very stringent requirements to positioning accuracy combined with tight bandwidth limitations demand innovative approaches to combat channel multipath effects. Closely spaced multipath components are the dominant cause of error in the system. Results of system simulations utilizing

R. Mosshammer; M. Huemer; R. Szumny; K. Kurek; J. Huttner; R. Gierlich

2007-01-01

461

Radioelectric compatibility of the future aeronautical communication system  

Microsoft Academic Search

The aeronautical community has recently decided to develop a new digital aeronautical communication system, named L-DACS, in order to fulfill the new air traffic requirements. This system, which will operate in the L frequency band (960 to 1164 MHz), would be internationally deployed from 2020. Many technologies were considered for this new aeronautical system but only two among them were

Najett Neji; R. De Lacerda; A. Azoulay; T. Letertre; O. Outtier

2009-01-01

462

A Digital Satellite Communications System for Corporate Telecommunications  

Microsoft Academic Search

A satellite communications system has been implemented by Citicorp to meet its present and future internal domestic telecommunications requirements. This system is currently being used for voice and data transmission and video teleconferencing between corporate facilities in New York, Los Angeles, San Francisco, and Sioux Falls, SD. Six additional cities will be served by the end of 1984. This system

KENNETH A. MILLER; ARNOLD SCHOEN

1984-01-01

463

Constructing reliable distributed communication systems with CORBA  

Microsoft Academic Search

Communication software and distributed services for next-generation applications must be reliable, efficient, flexible, and reusable. These requirements motivate the use of the Common Object Request Broker Architecture (CORBA). However, building highly available applications with CORBA is hard. Neither the CORBA standard nor conventional implementations of CORBA directly address complex problems related to distributed computing, such as real-time or high-speed quality

Silvano Maffeis; Douglas C. Schmidt

1997-01-01

464

Baseband system for human body channel communication  

Microsoft Academic Search

Biomedical sensor research is moving towards portable, wearable and implantable designs. Human body communication (HBC) is a promising data transmission method for low-power and high-speed biomedical sensors. Using the conductive human body as transmission medium, HBC trials has significant potential applications for personal healthcare and sports performance. The human body channel investigation identifies an optimum channel bandwidth of 1MHz to

Lin-hua Zhang; Xin-zhuo Liu; Jin Huang; Lei Wang

2010-01-01

465

Gigabit optical wireless communication system for indoor applications  

NASA Astrophysics Data System (ADS)

In this paper a novel high bandwidth optical wireless communication system for indoor personal area networking applications with both ubiquitous coverage and mobility feature is proposed and tradeoffs are studied. Gigabit-per-second optical wireless communication system with limited mobility provided to users has been demonstrated by proof-of- concept experiments for the first time. It has also been shown that when incorporating with the WiFi-based localization system, our proposed system can provide high-speed error-free operation with mobility over the entire room.

Wang, Ke; Nirmalathas, Ampalavanapillai; Lim, Christina; Skafidas, Efstratios

2010-12-01

466

Communications Solutions for Heterogeneous Systems Based on SOA  

NASA Astrophysics Data System (ADS)

In order to address the gaps which widely used in business application architecture and problems of heterogeneous system communication, this paper provides a standardized framework of SOA, built in the application of a loose coupling between systems "server + proxy" data exchange platform, to achieve heterogeneous data exchange and data sharing, and developed a business based on Web services platform, making full use of the Web service, which makes the system has good scalability and maintainability, to solve the problem of heterogeneous system communication and widely used to make up for the current architecture lack of business applications.

Wei, Xianmin

467

ANIMATION OF TALKING AGENTS  

Microsoft Academic Search

It i s envisioned that autonomous s oftware a gents that can communicate using speech and gesture will soon be on everybody's computer screen. This paper describes an architecture that can be used to d esign and animate c haracters capable of lip-synchronised synthetic speech as well as body gestures, for use in for example spoken d ialogue systems. A

Jonas Beskow

1997-01-01

468

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

469

How important is natural behaviour in animal farming systems?  

Microsoft Academic Search

It is often assumed and demanded that for a good welfare, farm animals should be given “the freedom to express their natural behaviour”. This demand is problematic for at least two reasons. First, natural behaviour is difficult to delineate because of its variability and flexibility. Second, some behavioural patterns that are clearly natural are in fact detrimental to animal welfare.

Marek Špinka

2006-01-01

470

Learning about Skeletons and Other Organ Systems of Vertebrate Animals.  

ERIC Educational Resources Information Center

Describes students' (n=175) understandings of the structure of animal (including human) skeletons and the internal organs found in them. Finds that older students have a better knowledge of animals' internal anatomies, although knowledge of human internal structure is significantly better than knowledge of rat, bird, and fish internal structure.…

Tunnicliffe, Sue Dale; Reiss, Michael

1999-01-01

471

Robust Framework for System Architecture and Hand-offs in Wireless and Cellular Communication Systems  

E-print Network

communications device from a first cell to a second cell in a cellular wireless communications system (GPRS, W-CDMA or OFDMA). This algorithm results in significant decrease in amount of power and/or result is a decrease of break in communications during...

Varma, Vishal V.

2010-01-14

472

Passive optical fast frequency-hop CDMA communications system  

Microsoft Academic Search

This paper proposes an all-fiber fast optical frequency-hop code division multiple access (FFH-CDMA) for high-bandwidth communications. The system does not require an optical frequency synthesizer allowing high communication bit rates. Encoding and decoding are passively achieved by Bragg gratings, Multiple Bragg gratings replace a frequency synthesizer, achieving a hopping rate in tens of GHz. A main lobe sine apodization can

Habib Fathallah; Leslie A. Rusch; Sophie Larochelle

1999-01-01

473

MLCD: overview of NASA's Mars laser communications demonstration system  

Microsoft Academic Search

NASA is presently overseeing a project to create the world's first free-space laser communications system that can be operated over a range much larger than the near-earth ranges that have been demonstrated to date. To be flown on the Mars Telecom Orbiter, planned for launch by NASA in 2009, it will demonstrate high-rate laser communications from Mars orbit to one

Don M. Boroson; Abhijit Biswas; Bernard L. Edwards

2004-01-01

474

Satellite communications systems and technology. Volume 2: Site reports  

NASA Technical Reports Server (NTRS)

This is volume 2 of the final report of the NASA/NSF Panel on Satellite Communications Systems and Technology. It consists of the site reports from the panel's visits to satellite communications facilities and laboratories in Europe, Japan, and Russia. The Executive Summary of the panel's final report is published separately. Volume 1, also published separately, consists of the panel's analytical chapters. Information on ordering the Executive Summary and Volume 1 from the National Technical Information Service is included.

Edelson, Burton I. (editor); Pelton, Joseph N. (editor); 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.

1993-01-01

475

MLCD: Overview of NASA's Mars Laser Communications Demonstration System  

Microsoft Academic Search

NASA is presently overseeing a project to create the world's first free-space laser communications system that can be operated over a range much larger than the near-earth ranges that have been demonstrated to date. To be flown on the Mars Telecom Orbiter, planned for launch by NASA in 2009, it will demonstrate high-rate laser communications from Mars orbit to one

D. M. Boroson; A. Biswas; B. L. Edwards

476

Real-time communication for distributed plasma control systems  

Microsoft Academic Search

Real-time control applications will benefit in the near future from the enhanced performance provided by multi-core processor architectures. Nevertheless real-time communication will continue to be critical in distributed plasma control systems where the plant under control typically is distributed over a wide area. At RFX-mod real-time communication is crucial for hard real-time plasma control, due to the distributed architecture of

A. Luchetta; A. Barbalace; G. Manduchi; A. Soppelsa; C. Taliercio

2008-01-01

477

Animals and the invention of the Phanerozoic Earth system.  

PubMed

Animals do not just occupy the modern biosphere, they permeate its structure and define how it works. Their unique combination of organ-grade multicellularity, motility and heterotrophic habit makes them powerful geobiological agents, imposing myriad feedbacks on nutrient cycling, productivity and environment. Most significantly, animals have 'engineered' the biosphere over evolutionary time, forcing the diversification of, for example, phytoplankton, land plants, trophic structure, large body size, bioturbation, biomineralization and indeed the evolutionary process itself. This review surveys how animals contribute to the modern world and provides a basis for reconstructing ancient ecosystems. Earlier, less animal-influenced biospheres worked quite differently from the one currently occupied, with the Ediacaran-Cambrian radiation of organ-grade animals marking a fundamental shift in macroecological and macroevolutionary expression. PMID:21190752

Butterfield, Nicholas J

2011-02-01

478

Secure Optical Communication System Based on Dynamic Strong Dispersion Control  

NASA Astrophysics Data System (ADS)

An novel solution for secure optical communication system based on dynamic strong dispersion control is proposed. Firstly, the theoretical principle of dynamic strong dispersion control and the system structure, especially the composition of encryption part and decryption part, are presented. Secondly, the feasibility and performance of the secure system are verified by numerical analyzing in a 40 Gb/s simulation system. Lastly, the huge application potential of this system in various fields is pointed out.

Cai, Ju; Bai, Qiujian; Ma, Wenying

2012-12-01

479

An inexpensive passive acoustic system for recording and localizing wild animal sounds  

E-print Network

An inexpensive passive acoustic system for recording and localizing wild animal sounds Sean A of the acoustic behavior and movements of vocalizing wild animals are challenged by economic, logis- tical, 00166 Roma, Italy Received 1 June 1999; accepted for publication 26 February 2000 An inexpensive animal

480

A Fast full-body fluorescence/bioluminescence imaging system for small animals  

E-print Network

, USA 10032 ABSTRACT Whole body in vivo optical imaging of small animals has widened its applicationsA Fast full-body fluorescence/bioluminescence imaging system for small animals Jong Hwan Lee of small animals. And for more accurate tomographic image reconstruction, additional data and information

Hielscher, Andreas

481

Ammonia Emissions and Animal Agriculture Susan W. Gay, Extension Engineer, Biological Systems Engineering, Virginia Tech  

E-print Network

Engineering, Virginia Tech Katharine F. Knowlton, Assistant Professor, Dairy Science, Virginia Tech Hygienists (ACGIH) has recommended a short-term (15-minute) exposure limit of 35 ppm. One strategy animal feeding operations. w.ext.vt.edu Produced by Communications and Marketing, College of Agriculture

Liskiewicz, Maciej

482

New laser communication and laser ranging of integration source system  

NASA Astrophysics Data System (ADS)

With the development of laser transmission technology, the laser ranging and communication technology integration, miniaturization has become an important research direction nowadays. Based on laser ranging and communication integration of the requirements, design the1064nm fiber laser system, to suffice laser communication, laser ranging and beacon beam of the requirements at the same time could be provide the coherent detection to signal beam. The simulation experiment the 1064nm of free space optical communication in the laboratory, the coherent detection sensitivity is higher than -22dBm, the bit error rate 10-7 laser communication system. Multiple laser ranging to build coherent beam experimental realization of the coupling efficiency is higher than 70%, the laser output power of greater than 21W. The light source system is designed in this paper can realize the previous several lasers to complete the task, not only has the advantage of integration and miniaturization, through the simulation experiment could satisfy the communication requirements of power laser ranging ,and it is ideal light for laser transmission integration technology.

Wen, Guan-yu; Wang, Shuang; Shi, Haodong; Fu, Qiang; Gao, Duo-rui

2014-12-01

483

An Isolated Working Heart System for Large Animal Models  

PubMed Central

Since its introduction in the late 19th century, the Langendorff isolated heart perfusion apparatus, and the subsequent development of the working heart model, have been invaluable tools for studying cardiovascular function and disease1-15. Although the Langendorff heart preparation can be used for any mammalian heart, most studies involving this apparatus use small animal models (e.g., mouse, rat, and rabbit) due to the increased complexity of systems for larger mammals1,3,11. One major difficulty is ensuring a constant coronary perfusion pressure over a range of different heart sizes – a key component of any experiment utilizing this device1,11. By replacing the classic hydrostatic afterload column with a centrifugal pump, the Langendorff working heart apparatus described below allows for easy adjustment and tight regulation of perfusion pressures, meaning the same set-up can be used for various species or heart sizes. Furthermore, this configuration can also seamlessly switch between constant pressure or constant flow during reperfusion, depending on the user’s preferences. The open nature of this setup, despite making temperature regulation more difficult than other designs, allows for easy collection of effluent and ventricular pressure-volume data. PMID:24962492

Schechter, Matthew A.; Southerland, Kevin W.; Feger, Bryan J.; Linder, Dean; Ali, Ayyaz A.; Njoroge, Linda; Milano, Carmelo A.; Bowles, Dawn E.

2014-01-01

484

Computer-aided communication satellite system analysis and optimization  

NASA Technical Reports Server (NTRS)

The capabilities and limitations of the various published computer programs for fixed/broadcast communication satellite system synthesis and optimization are discussed. A satellite Telecommunication analysis and Modeling Program (STAMP) for costing and sensitivity analysis work in application of communication satellites to educational development is given. The modifications made to STAMP include: extension of the six beam capability to eight; addition of generation of multiple beams from a single reflector system with an array of feeds; an improved system costing to reflect the time value of money, growth in earth terminal population with time, and to account for various measures of system reliability; inclusion of a model for scintillation at microwave frequencies in the communication link loss model; and, an updated technological environment.

Stagl, T. W.; Morgan, N. H.; Morley, R. E.; Singh, J. P.

1973-01-01

485

An all digital low data rate communication system  

NASA Technical Reports Server (NTRS)

The advent of digital hardwares has made it feasible to implement many communication system components digitally. With the exception of frequency down conversion, the proposed low data rate communication system uses digital hardware completely. Although the system is designed primarily for deep space communications with large frequency uncertainty and low signal-to-noise ratio, it is also suitable for other low data rate applications with time-shared operation among a number of channels. Emphasis is placed on the fast Fourier transform receiver and the automatic frequency control via digital filtering. The speed available from the digital system allows sophisticated signal processing to reduce frequency uncertainty and to increase the signal-to-noise ratio.

Chen, C.-H.; Fan, M.

1973-01-01

486

Communications satellite systems operations with the space station, volume 2  

NASA Technical Reports Server (NTRS)

A financial model was developed which described quantitatively the economics of the space segment of communication satellite systems. The model describes the economics of the space system throughout the lifetime of the satellite. The expected state-of-the-art status of communications satellite systems and operations beginning service in 1995 were assessed and described. New or enhanced space-based activities and associated satellite system designs that have the potential to achieve future communications satellite operations in geostationary orbit with improved economic performance were postulated and defined. Three scenarios using combinations of space-based activities were analyzed: a spin stabilized satellite, a three axis satellite, and assembly at the Space Station and GEO servicing. Functional and technical requirements placed on the Space Station by the scenarios were detailed. Requirements on the satellite were also listed.

Price, K.; Dixon, J.; Weyandt, C.

1987-01-01

487

Fixed and mobile satellite communication systems for ETS-VI  

NASA Astrophysics Data System (ADS)

Recent advances in launch vehicle technology have made multibeam communication satellites realistic. The Japanese national project to launch a 2-ton class geostationary satellite, ETS-VI (Engineering Test Satellite-VI), is in progress. NTT involves the development of on-board equipment for fixed and mobile multibeam satellite communication systems using Ka, S and C bands. Key technologies to be flight-verified are: large-diameter, high-precision reflectors, a low sidelobe cluster feeder, precise antenna pointing control system, monolithic IC satellite switch, monolithic IC transponder, Multi-Port Amplifier, and distributed supervisory and control system.

Nakagawa, Kazuo; Kawai, Makoto; Tanaka, Masayoshi

488

Marco (Medical Record Communications) - System Concept, Design and Evaluation  

PubMed Central

MARCO, an interfacility communication system, has been designed to promote safe relevant health care delivery to the inner city pediatric patient receiving care in a network consisting of Boston City Hospital and its affiliated Neighborhood Health Centers. This application of computer technology to communication of medical information compiled on an individual patient in multiple locations has implications for private group practice as well as other urban networks similar to our own. This paper provides the MARCO system concept, the system design and evaluation of its success after two years of operation.

Moffatt, P. H.; Heisler, B. D.; Mela, W. D.; Alpert, J. J.; Goldstein, H.M.

1978-01-01

489

A fast full-body fluorescence/bioluminescence imaging system for small animals  

NASA Astrophysics Data System (ADS)

Whole body in vivo optical imaging of small animals has widened its applications and increased the capabilities for preclinical researches. However, most commercial and prototype optical imaging systems are camera-based systems using epi- or trans- illumination mode, with limited views of small animals. And for more accurate tomographic image reconstruction, additional data and information of a target animal is necessary. To overcome these issues, researchers have suggested several approaches such as maximizing the detection area or using the information of other highresolution modalities such as CT, MRI or Ultrasound, or using multi-spectral signals. As one of ways to maximizing the detection area of a target animal, we present a new fluorescence and bioluminescence imaging system for small animals, which can image entire surface of a target animal simultaneously. This system uses double mirror reflection scheme and it consists of input unit, imaging unit with two conical mirrors, the source illumination part and the surface scanner, and the detection unit with an intensified CCD camera system. Two conical mirrors are configured that a larger size mirror captures a target animal surface, and a smaller size mirror projects this captured image onto a CCD camera with one acquisition. With this scheme, we could capture entire surface of a target animal simultaneously and improve back reflection issue between a mirror and an animal surface of a single conical mirror scheme. Additionally, we could increase accessibility to an animal for multi-modality integration by providing unobstructed space around a target animal.

Lee, Jong Hwan; Kim, Hyun Keol; Jia, Jingfei; Fong, Christopher; Hielscher, Andreas H.

2013-03-01

490

The effects of hands-free communication device systems: communication changes in hospital organizations  

Microsoft Academic Search

Objective To analyze the effects that hands-free communication device (HCD) systems have on healthcare organizations from multiple user perspectives. Design This exploratory qualitative study recruited 26 subjects from multiple departments in two research sites located in Portland, Oregon: an academic medical center and a community hospital. Interview and observation data were gathered January through March, 2007. Measurements Data were analyzed

Joshua E Richardson; Joan S Ash

2010-01-01

491

Automatic real-time pair-feeding system for animals  

NASA Technical Reports Server (NTRS)

A pair feeding method and apparatus are provided for experimental animals wherein the amount of food consumed is immediately delivered to a normal or control animal so that there is a qualitative, quantitative and chronological correctness in the pair feeding of the two animals. This feeding mechanism delivers precisely measured amounts of food to a feeder. Circuitry is provided between master and slave feeders so that there is virtually no chance of a malfunction of the feeding apparatus, causing erratic results. Recording equipment is also provided so that an hourly record is kept of food delivery.

Leon, H. A.; Connolly, J. P.; Hitchman, M. J.; Humbert, J. E. (inventors)

1974-01-01

492

Reverberation and frequency attenuation in forests-implications for acoustic communication in animals  

NASA Astrophysics Data System (ADS)

Rates of reverberative decay and frequency attenuation are measured within two Australian forests. In particular, their dependence on the distance between a source and receiver, and the relative heights of both, is examined. Distance is always the most influential of these factors. The structurally denser of the forests exhibits much slower reverberative decay, although the frequency dependence of reverberation is qualitatively similar in the two forests. There exists a central range of frequencies between 1 and 3 kHz within which reverberation varies relatively little with distance. Attenuation is much greater within the structurally denser forest, and in both forests it generally increases with increasing frequency and distance, although patterns of variation differ between the two forests. Increasing the source height generally reduces reverberation, while increasing the receiver height generally reduces attenuation. These findings have considerable implications for acoustic communication between inhabitants of these forests, particularly for the perching behaviors of birds. Furthermore, this work indicates the ease with which the general acoustic properties of forests can be measured and compared.

Padgham, Mark

2004-01-01

493

Systems for Anonymous Communication George Danezis  

E-print Network

: semi- trusted relays, mix systems, remailers, robust & verifiable mixes, and onion routing systems. We.2 Provable security for mix-networks . . . . . . . . . . . . . . . . . 30 5 Onion routing 32 5.1 Early onion routing systems . . . . . . . . . . . . . . . . . . . . . 32 5.2 Tor's Onion Routing

Syverson, Paul

494

77 FR 6000 - Airworthiness Directives; Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and Collision Avoidance System (TCAS) Units AGENCY: Federal...Aviation Communication & Surveillance Systems (ACSS) traffic alert and collision avoidance system (TCAS) units with part...

2012-02-07

495

Short communication Hedgehog structure in nematic and magnetic systems  

E-print Network

1097 Short communication Hedgehog structure in nematic and magnetic systems N. Schopohl and T structure of hedgehog point disclinations in magnetic and nematic liquid crystal systems is investigated. In the nematic hedgehog the solution is uniaxial everywhere. Nematic hedgehogs are very much larger than magnetic

Paris-Sud XI, Université de

496

Kansas Communication and Instruction System through Fiber-Optic Transmission.  

ERIC Educational Resources Information Center

Schools and communities will restructure as they move into the next decade. The success of this restructuring will be dependent upon access to and sharing of quality teaching and information through an expanded communication system. One of the major two-way interactive technologies is the fiber-optic cable: a delivery system that will provide…

Kansas State Dept. of Education, Topeka.

497

Polling in a multidrop communication system: Waiting line analysis  

Microsoft Academic Search

A communication system is considered which consists of buffered input terminals linked by means of a multidrop line to an output device. Data enters the system through the terminals and the service operation is the transfer of data units to the output device. The terminals are sequentially polled; each terminal holds the channel until its buffer is emptied. The input

Alan G. Konheim; Bernd Meister

498

Wireless communications based system to monitor performance of rail vehicles  

Microsoft Academic Search

This paper describes a recently developed remote monitoring system, based on a combination of embedded computing, digital signal processing, wireless communications, GPS, and GIS technologies. The system includes onboard platforms installed on each monitored vehicle and a central station located in an office. Each onboard platform detects various events onboard a moving vehicle, tags them with time and location information,

B. Nejikovsky; E. Keller

2000-01-01

499

Simulation of optical communication systems using direct and external modulation  

Microsoft Academic Search

In this work we present an analysis of the performance of optical communication systems using two types of modulation: direct and external. The analysis was based on mathematical models., which was implemented by using of PC SIMFO, a packet of simulation of optical systems developed by Photonic Technology Lab (LTF-UNICAMP). We used a nonlinear dispersive optical fiber and we optimized

M. I. B. de Maizman; L. C. Kakimoto; E. Moschim

2002-01-01

500

Timing requirements for the Sanguine ELF communications system  

NASA Technical Reports Server (NTRS)

The development of an extremely low frequency (ELF) communications system for command and control of naval forces is discussed. The basic requirements for the system are defined. Emphasis is placed on the clock requirements based on phase or time rather than frequency. The time and frequency requirements at the transmitter stations are tabulated.

Kruger, B.

1972-01-01