Sample records for animal communication systems

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

    Microsoft Academic Search

    SEAN F. HANSER; LAURANCE R. DOYLE

    1999-01-01

    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,

  2. Communication support for systems engineering - process modelling and animation with APRIL

    Microsoft Academic Search

    Stephan Philippi; Hermann Josef Hill

    2007-01-01

    The most important task in the early stages of systems engineering is the building of models which capture the relevant knowledge of a given application domain. A working communication with domain experts who possess this knowledge is crucial, since misunderstandings almost always lead to expensive system redesigns in later development stages. In this context, especially the modelling of systems behaviour

  3. Animal Communications Through Seismic Vibrations

    SciTech Connect

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

    2001-05-02

    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.

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

    PubMed Central

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

    2014-01-01

    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

  5. The Communicative Functions of Animation in User Interfaces

    E-print Network

    Novick, David G.

    The Communicative Functions of Animation in User Interfaces David Novick The University of Texas of animation communicate to the user? When should a designer consider introducing animation into an interface. In this paper we claim that the key communicative functions of animation in user interfaces can be characterized

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

    Microsoft Academic Search

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

    2011-01-01

    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

  7. New Waves in Marine Science Symposium: Marine Animal Communication.

    ERIC Educational Resources Information Center

    Allen, Betty, Comp.

    1989-01-01

    Presented are the abstracts from three research projects on marine social systems which were a part of a marine science symposium. Five sets of activities on marine animal communication are included, one each for grades K-2, 3-5, 6-8 and 9-12, and informal education. (CW)

  8. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    1 | 27 Communication Systems 21st lecture Chair of Communication Systems Department of Applied NATed and proxied HTTP connection of a client? Communication Systems Q&A #12;3 | 27 3rd and last part of the communication systems lecture: digital telephony For a rather long time telephone and data networks were

  9. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    ;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 (Operation and Maintenance Center) ­ Network Administration #12;6 | 36 Communication Systems GSM interfaces

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

    NASA Astrophysics Data System (ADS)

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

    2011-02-01

    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.

  11. Creating Automated Interactive Video Playback for Studies of Animal Communications

    E-print Network

    Butkowski, Trisha

    2010-01-16

    Video playback is a technique used to study the visual communication and behaviors of animals. While video playback is a useful tool, most experiments lack the ability for the visual stimulus to interact with the live animal. The limited number...

  12. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    of businesses directly depend on this network (online shops, auctions, b2b, multiplayer games, advertisements, porn sites, web services, ... :-)) #12;8 | 28 Communication Systems network insecurity Inner and intra and leaving them at half past nine (no mail and online communication was available ­ most MS operated networks

  13. Specificationand Animation of Reactive Systems

    Microsoft Academic Search

    K. J. Turner; A. McClenaghan; C. Chan

    1996-01-01

    S OLVE (Specification using an Object-based, L OTOS -defined, Visual language) is de- signed to allow formal requirements capture, particularly for reactive systems. The S OLVE language is object-based, and formally definedusing L OTOS (Language Of Temporal Or- dering Specification). S OLVE is supported by tools that allow direct visual animation of systems specifiedin this language. Animation is supported by

  14. Child's Modes of Communication with the Animal.

    ERIC Educational Resources Information Center

    Salomon, Anne; Comeau, Judith

    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…

  15. Secure video communications system

    DOEpatents

    Smith, Robert L. (Idaho Falls, ID)

    1991-01-01

    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.

  16. The IRIDIUM communications system

    Microsoft Academic Search

    R. J. Leopold; A. Miller

    1993-01-01

    A description is given of the IRIDIUM communication system, so-called because the system design originally consisted of 77 networked satellites, and the element iridium has the atomic number 77. The goal is to make instant global communications a reality. The system design now consists of 60 satellites, a system control facility, gateways, and subscriber units. Each of these components is

  17. Communication System and Method

    NASA Technical Reports Server (NTRS)

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

    2014-01-01

    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.

  18. Animal breeding systems

    Microsoft Academic Search

    John D. Reynolds

    1996-01-01

    The study of breeding systems explores relationships between mating behaviour and parental care. Recent findings have shown that in many birds, fishes, anurans, and insects, females play a more active role than previously thought, by engaging in mate choice, mating with more than one male, and selecting genetic partners separately from social partners. Theoretical advances have improved our understanding of

  19. Patient communication: a multidisciplinary approach using animated cartoons.

    PubMed

    Leiner, Marie; Handal, Gilbert; Williams, Darryl

    2004-10-01

    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 with patients include the use of videotapes, videotape modeling or cartoon illustrations. Do these products communicate effectively because they overcome illiteracy or because they also transmit a very clear message? Can good transmission of messages overcome illiteracy? In this study, we compared the effectiveness of a printed message about polio vaccinations with the same message converted into a production of animated cartoons using marketing and advertising techniques. The production that resulted from using this strategy showed that in the setting of this study, a well-designed animated cartoon is more effective in delivering a message than the same information provided in written instructional materials. PMID:15150139

  20. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    Sciences University of Freiburg 2009 #12;2 | 18 Communication Systems Organization Exam: Please do register with the exam office (10 BA and 5 Masters by now), so we could decide/announce as early as possible which part to offer (BA is oral-only) Started into theory of securing network connections

  1. Satellite communications system 'Tyulpan'

    NASA Astrophysics Data System (ADS)

    Tchuyan, R. K.; Tarasov, E. V.; Belousov, A. P.; Balyk, V. M.; Kovtunenko, V. M.; Morozov, V. A.; Andreev, V. A.; v'yunenko, K. A.

    1993-10-01

    A concept of the satellite communication system called 'Tyulpan' (because or its tulip-resembling shape) is considered. This conception envisages the use of six satellites-retranslators installed on high-latitude elliptic orbits. Such a system can provide the communication for mean- and high-latitude region of Europe, Asia, and America. For the communication, super small ground stations of 0.4 m in diameter can be used. In the development of system conception, the already existing technical solutions and possibility of conversion or existing installations of military destination were taken into account. Therefore, the system considered can be realized at the earliest possible date.

  2. Communication Systems (Systeme III)

    E-print Network

    Schindelhauer, Christian

    Lecture earns 6 credit points (ECTS) Different exams for bachelor and master/diploma students ­ Oral exam (directly after the end of term or within the official exam period) ­ Or written exam if the number selected topics of ­ I. Data and voice communication in IP networks ­ II. Security issues in networking

  3. An architecture for integrating logical and physical animations for general-purpose graphical simulation systems

    Microsoft Academic Search

    Kow C. Chang; Robert F. Gordon; Edward A. MacNair

    1994-01-01

    Animation of the logical model is important for debugging the model, and animation of the physical system is important for communicating the results to others. To assure accuracy and consistency between these two animation views of the system, it is necessary to integrate the model building with the production of each animation. This paper describes a new architecture for developing

  4. The FEP communications system

    Microsoft Academic Search

    David R. McElroy

    1988-01-01

    The Fltsatcom EHF experimental military satellite communications packages carried aboard the Fltsatcom satellites F7 and F8 are discussed. These packages use EHF signals in addition to spread-spectrum and on-board signal processing and traffic-routing methods in order to provide robust satellite communications to small stationary and mobile terminals. Signaling formats and protocols are compatible with those of the DOD Milstar system,

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

    DOEpatents

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

    2011-12-13

    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.

  6. The Picture Exchange Communication System

    Microsoft Academic Search

    Andy Bondy; Lori Frost

    2001-01-01

    The Picture Exchange Communication System (PECS) is an alternative\\/augmentative communication system that was developed to teach functional communication to children with limited speech. The approach is unique in that it teaches children to initiate communicative interactions within a social framework. This article describes the advantages to implementing PECS over traditional approaches. The PECS training protocol is described wherein children are

  7. Communication Systems. Laboratory Activities.

    ERIC Educational Resources Information Center

    Sutherland, Barbara, Ed.

    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…

  8. You talkin' to me? Interactive playback is a powerful yet underused tool in animal communication research.

    PubMed

    King, Stephanie L

    2015-07-01

    Over the years, playback experiments have helped further our understanding of the wonderful world of animal communication. They have provided fundamental insights into animal behaviour and the function of communicative signals in numerous taxa. As important as these experiments are, however, there is strong evidence to suggest that the information conveyed in a signal may only have value when presented interactively. By their very nature, signalling exchanges are interactive and therefore, an interactive playback design is a powerful tool for examining the function of such exchanges. While researchers working on frog and songbird vocal interactions have long championed interactive playback, it remains surprisingly underused across other taxa. The interactive playback approach is not limited to studies of acoustic signalling, but can be applied to other sensory modalities, including visual, chemical and electrical communication. Here, I discuss interactive playback as a potent yet underused technique in the field of animal behaviour. I present a concise review of studies that have used interactive playback thus far, describe how it can be applied, and discuss its limitations and challenges. My hope is that this review will result in more scientists applying this innovative technique to their own study subjects, as a means of furthering our understanding of the function of signalling interactions in animal communication systems. PMID:26136047

  9. An Interactive Facial Animation System Ugur Gudukbay

    E-print Network

    Güdükbay, Ugur

    animation system developed by Keith Waters, which uses a muscle-based face model. We built an interactive facial animation system on top of it to produce keyframe animations of a synthetic face model. The user to the face by moving the muscle vectors de ned on the face model. The user might also change the orientation

  10. 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

  11. Walkthrough using Animation Database System MOVE

    Microsoft Academic Search

    Susumu Kuroki; Katsuhiko Kikkawa; Kunihiko Kaneko; Akifumi Makinouchi

    1993-01-01

    This paper discusses walkthrough as an advanced application of the object-oriented animation database system MOVE, which is developed so as to make producing computer animation easier. Since MOVE offers computer animation facilities as well as data management facilities in encapsulated form, users can use them without knowing the details. We introduce a graphics model in MOVE. Using this, we produced

  12. Expressive Animated Agents for Affective Dialogue Systems

    Microsoft Academic Search

    Jonas Beskow; Loredana Cerrato; Björn Granström; David House; Mikael Nordenberg; Magnus Nordstrand; Gunilla Svanfeldt

    2004-01-01

    We present our current state of development regarding animated agents applicable to affective dialogue systems. A new set of tools are under development to support the creation of animated characters compatible with the MPEG-4 facial animation standard. Furthermore, we have collected a multimodal expressive speech database including video, audio and 3D point motion registration. One of the objectives of collecting

  13. Health & National Animal Identification System

    Microsoft Academic Search

    Susan L. McClanahan

    The health of cattle is most vulnerable during the period after arrival in a new environment. It is at this time that a combination of animal husbandry and animal science bring the greatest success. The Oklahoma fact sheet on stocker cattle referenced in this lesson and Lesson 3 of the \\

  14. Availability analysis of systems with suspended animation

    Microsoft Academic Search

    Duane Huffman; Robert Bergman; Suprasad V. Amari; Ming J. Zuo

    2008-01-01

    In many practical cases, during a system failure or downtime, all non-failed components are kept idle to eliminate further damage to the system. This phenomenon is known as suspended animation (SA) because the aging process of the non-failed components is suspended. Suspended animation introduces dependencies among the component states. Therefore, we cannot calculate the system availability using the methods that

  15. Insat communication system

    NASA Astrophysics Data System (ADS)

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

    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.

  16. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    special "packet too big" ICMP message ­ Minimum MTU in IPv4 was 576 for IPv6 1280 Byte ­ Host has to do are replaced with traffic class, payload length, hop limit and next header (type) #12;7 | 27 Communication headers All optional information moved to extension headers Put in between IP v6 header and payload

  17. Communication using Synchronized Chaotic Systems

    E-print Network

    Anlage, Steven

    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

  18. Survey of Interlibrary Communications Systems.

    ERIC Educational Resources Information Center

    Kenney, Brigitte L.

    The growth and development of library networks increased the need for more rapid interlibrary communication. This survey describes the history, costs and recent developments of various means of interlibrary communication. Extensive references are provided for each area. The communications systems discussed are: surveys, mail, telephone, facsimile,…

  19. Information Systems and Business Communication.

    ERIC Educational Resources Information Center

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

    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"…

  20. The Picture Exchange Communication System

    Microsoft Academic Search

    Andrew S. Bondy; Lori A. Frost

    1994-01-01

    A variety of strategies have been used to help children with autism acquire functional communication skills. The Picture Exchange Communication System (PECS) is a unique communication training program that was developed as a means of circumventing some shortcomings associatd with these strategies. A description of the steps within PECS is provided. Long-term group data have indicated that a large proportion

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

    DOEpatents

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

    2011-02-01

    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.

  2. Core systems of geometry in animal minds

    PubMed Central

    Spelke, Elizabeth S.; Lee, Sang Ah

    2012-01-01

    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

  3. Communications systems checkout study

    NASA Technical Reports Server (NTRS)

    Ginter, W. G.

    1972-01-01

    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.

  4. A conceptual model for particle systems animation 

    E-print Network

    Flaherty, Eric Wayne

    1992-01-01

    Particle systems represent a technique for creating a special class of computer generated images. This class of imagery would be difficult or impossible to create using traditional surface based representations found in current computer animation...

  5. A conceptual model for particle systems animation

    E-print Network

    Flaherty, Eric Wayne

    1992-01-01

    Particle systems represent a technique for creating a special class of computer generated images. This class of imagery would be difficult or impossible to create using traditional surface based representations found in current computer animation...

  6. A Knowledge-Based Computer Animation System

    E-print Network

    Kahn, Kenneth M.

    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 ...

  7. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    Bachelor's thesis Mentor and examiner: Prof. Gerald Q. Maguire Jr. Communication Systems School apparater är därför mångdubbelt fler än antalet hem som är kopplade till systemet. Det finns flera system

  8. Communications Systems Driven by Software Agent Technology Communications Systems Driven by

    E-print Network

    Poslad, Stefan

    Communications Systems Driven by Software Agent Technology Communications Systems Driven to communications systems and surveys recent developments. Recent work using distributed network management communications systems. For example, another important factor in achieving inter-operability of transmissions

  9. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    Internet) and an arbitrary end system in a switched Ethernet is not visible to third party ­ But what to do questions from last lecture? We were dealing with Ethernet extensions last lecture: Why CSMA/CD was dropped in the 10 GbE and 100 GbE standards? What is the major difference between an Ethernet hub

  10. Communication Systems Chair of Communication Systems

    E-print Network

    Schindelhauer, Christian

    -in address like MAC (layer 2 in Ethernets, WLAN, BlueTooth, TokenRing) IP has no mechanism for avoiding / protocol introduced? Special IP addresses: Which IPv4 addresses could be assigned to end systems routable world wide? Which special addresses do you know? #12;4 | 26 IP does not implement any automatic address

  11. INMARSAT's personal communicator system

    NASA Technical Reports Server (NTRS)

    Hart, Nick; Haugli, HANS-C.; Poskett, Peter; Smith, K.

    1993-01-01

    Inmarsat has been providing near global mobile satellite communications since 1982 and Inmarsat terminals are currently being used in more than 130 countries. The terminals have been reduced in size and cost over the years and new technology has enabled the recent introduction of briefcase sized personal telephony terminals (Inmarsat-M). This trend continues and we are likely to see Inmarsat handheld terminals by the end of the decade. These terminals are called Inmarsat-P and this paper focuses on the various elements required to support a high quality service to handheld terminals. The main system elements are: the handheld terminals; the space segment with the associated orbits; and the gateways to terrestrial networks. It is both likely and desirable that personal handheld satellite communications will be offered by more than one system provider and this competition will ensure strong emphasis on service quality and cost of ownership. The handheld terminals also have to be attractive to a large number of potential users, and this means that the terminals must be small enough to fit in a pocket. Battery lifetime is another important consideration, and this coupled with radiation safety requirements limits the maximum radiated EIRP. The terminal G/T is mainly constrained by the gain of the omnidirectional antenna and the noise figure of the RF front end (including input losses). Inmarsat has examined, with the support of industry, a number of Geosynchronous (GSO), Medium Earth Orbit (MEO) and Low Earth Orbit (LEO) satellite options for the provision of a handheld mobile satellite service. This paper describes the key satellite and orbit parameters and tradeoffs which affect the overall quality of service and the space segment costing. The paper also stresses not only the importance of using and sharing the available mobile frequency band allocations efficiently, but also the key considerations affecting the choice of feeder link bands. The design of the gateways and the terrestrial network is critical to the overall viability of the service, and this paper also examines the key technical parameters associated with the Land Earth Stations (LES), which act as gateways into the Public Switched Telephone Network (PSTN). These not only include the design tradeoffs associated with the LES, but also the different terrestrial network interface options. The paper concludes with a brief description of the satellite propagation conditions associated with the use of handheld terminals. It describes how the handheld results in a number of propagation impairments which are not common to the previous measurements associated with vehicle mounted antennas. These measurements indicate that there is a complex tradeoff between link margin and the elevation angle to the satellite which has a significant impact on the space segment requirements and costing.

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

    ERIC Educational Resources Information Center

    2000

    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…

  13. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    : Professor Gerald Q. Maguire Jr. Communication Systems (CoS) School of Information and Communication experiment visar att det finns en potential f¨or betydande energibesparing n¨ar du anv¨ander den f Professor Gerald Q. Maguire Jr, who has supported me throughout my thesis with his patience and knowledge

  14. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    Degree project in Communication Systems Second level, 30.0 HEC Stockholm, Sweden M O Z H D E H K A M E L Synchronizing radio base stations Extending the precision time protocol to a metropolitan area network KTH Information and Communication Technology #12;Extending the precision time protocol

  15. Communication, Work Systems and HRD

    ERIC Educational Resources Information Center

    Pace, R. Wayne

    2013-01-01

    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…

  16. C. elegans ciliated sensory neurons release extracellular vesicles that function in animal communication.

    PubMed

    Wang, Juan; Silva, Malan; Haas, Leonard A; Morsci, Natalia S; Nguyen, Ken C Q; Hall, David H; Barr, Maureen M

    2014-03-01

    Cells release extracellular vesicles (ECVs) that play important roles in intercellular communication and may mediate a broad range of physiological and pathological processes. Many fundamental aspects of ECV biogenesis and signaling have yet to be determined, with ECV detection being a challenge and obstacle due to the small size (100 nm) of the ECVs. We developed an in vivo system to visualize the dynamic release of GFP-labeled ECVs. We show here that specific Caenorhabdidits elegans ciliated sensory neurons shed and release ECVs containing GFP-tagged polycystins LOV-1 and PKD-2. These ECVs are also abundant in the lumen surrounding the cilium. Electron tomography and genetic analysis indicate that ECV biogenesis occurs via budding from the plasma membrane at the ciliary base and not via fusion of multivesicular bodies. Intraflagellar transport and kinesin-3 KLP-6 are required for environmental release of PKD-2::GFP-containing ECVs. ECVs isolated from wild-type animals induce male tail-chasing behavior, while ECVs isolated from klp-6 animals and lacking PKD-2::GFP do not. We conclude that environmentally released ECVs play a role in animal communication and mating-related behaviors. PMID:24530063

  17. The central importance of information in studies of animal communication Robert M. Seyfarth a,*, Dorothy L. Cheney b

    E-print Network

    The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. The conceptEssay The central importance of information in studies of animal communication Robert M. Seyfarth a Available online 21 May 2010 MS. number: AE-09-00802 Keywords: animal communication animal signal

  18. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    system is required to facilitate data management throughout this collaborative process. In addition this PLM system is a specialized distributed system. Maintaining data consistency can be challengingDegree project in Communication Systems Second level, 30.0 HEC Stockholm, Sweden J U L I O VA R G

  19. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    of Science Thesis Examiner: Professor Gerald Q. Maguire Jr. Academic supervisor: Professor Gerald Q. Maguire Jr. Industrial supervisor: Kenneth Andersson, The Mobile Life Communication Systems School till en mognande bransch, med nya växande affärs- och intäktsmodeller. Som apputvecklare finns

  20. Automotive Communication Systems : 1) Introduction to AUTOSAR communication stack

    E-print Network

    Navet, Nicolas

    Picture from [5] LIN : Local Interconnect Network MOST : Media Oriented Systems Transport Ethernet1 Automotive Communication Systems : 1) Introduction to AUTOSAR communication stack 2;2 AUTOSAR Communication Stack © 2010 N. Navet INRIA / RTaW - 3 AUTOSAR at a glance Automotive Open System

  1. Computerised animal house management system (CAMS)

    Microsoft Academic Search

    P. Hempel; R. Merx; M. Schulz; U. Zillmann

    2000-01-01

    Data processing systems for the management of animal houses are available as individually tailored solutions to meet the specific requirements of different institutions in various sectors. After four years of use, a “proprietary system” (originally used by Boehringer\\/Mannheim), which was based on UNIFACE and ORACLE database software and consisted of a VAX station with eight terminals, was replaced by a

  2. Designing complementary communication systems

    E-print Network

    Harry, Drew

    2012-01-01

    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 ...

  3. Creating Automated Interactive Video Playback for Studies of Animal Communications 

    E-print Network

    Butkowski, Trisha

    2010-01-16

    -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...

  4. Neural communication systems Pter Andrs

    E-print Network

    Andras, Peter

    Neural communication systems Péter András School of Computing Science University of Newcastle Newcastle upon Tyne, NE1 7RU, UK peter.andras@ncl.ac.uk Abstract ­ Understanding how biological neural systems work needs appropriate models that focus on relevant features of neural activities and ignore

  5. Communication system for industrial automation

    Microsoft Academic Search

    Brahim Maaref; Salem Nasri; Pascal Sicard

    1997-01-01

    The authors main concern is to efficiently integrate video and audio devices alongside robots, programmable logic controllers (PLCs), numerical control (NC), manufacturing computers and process control systems. They present an experimental platform that implements their manufacturing communication system. This platform has been developed in the laboratory for the support of high bandwidth and real-time distributed applications. In this paper, they

  6. ANIMATION a system for animation scene and contents creation, retrieval and display

    E-print Network

    Stanchev, Peter

    of the current animation software tools are described by Richard Parent in [5]. The driving ideas behindANIMATION ­ a system for animation scene and contents creation, retrieval and display Peter L. Stanchev Kettering University ABSTRACT There is an increasing interest in the computer animation. The most

  7. Advanced satellite communication system

    NASA Technical Reports Server (NTRS)

    Staples, Edward J.; Lie, Sen

    1992-01-01

    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.

  8. Communication synthesis for distributed embedded systems

    Microsoft Academic Search

    Ti-Yen Yen; Wayne Wolf

    1995-01-01

    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

  9. The Anima Animation System, Version 2.0

    E-print Network

    Hamilton, Howard J.

    ...........................................................................................................2 2. Animation Software in the film and game industries. Animation software has become an important Canadian industry, due% of the US$146-million world market for professional 3-D animation software packages in 2001. Their systems

  10. Arguments for the Integration of the Non-Zero-Sum Logic of Complex Animal Communication with Information Theory

    Microsoft Academic Search

    Vincenzo Penteriani

    2010-01-01

    The outstanding levels of knowledge attained today in the research on animal communication, and the new available technologies to study visual, vocal and chemical signalling, allow an ever increasing use of information theory as a sophisticated tool to improve our knowledge of the complexity of animal communication. Some considerations on the way information theory and intraspecific communication can be linked

  11. Speech Communication Systems

    Microsoft Academic Search

    WINSTON E. KOCKt

    1962-01-01

    Telephone, radio broadcasting, public-address and bandwidth conserving systems are discussed with particular attention being given to the latter two. The relation of certain properties of hearing (e.g., the Haas effect) to public address system design is reviewed along with several bandwidth conserving techniques including speech interpolation systems and vocoders.

  12. How plant–animal interactions signal new insights in communication

    Microsoft Academic Search

    H. Martin Schaefer; Veronika Schaefer; Douglas J. Levey

    2004-01-01

    Fundamental concepts about the diversity and evolution of signals have been developed mainly in the context of sexual selection. Here, we review the functional ecology of signals in a different context, that of plant-animal interactions. The visual signals of fruits and flowers are relatively constant and clear in the message that they convey. Thus, plant signals present a particularly suitable,

  13. Acoustical Communications for Wireless Downhole Telemetry Systems 

    E-print Network

    Farraj, Abdallah

    2012-08-22

    This dissertation investigates the use of advanced acoustical communication techniques for wireless downhole telemetry systems. Using acoustic waves for downhole telemetry systems is investigated in order to replace the wired communication systems...

  14. Ultramicrowave communications system, phase 2

    NASA Technical Reports Server (NTRS)

    1980-01-01

    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.

  15. Printed Near Field Communication System

    Microsoft Academic Search

    Karin Weigelt; Arved C. Hübler

    2008-01-01

    This paper presents a printed near field communication system that can be integrated into everyday objects, like paper products or plastic parts. The inter- face is realised by high-volume production technologies, like printing and injection moulding, as they allow for the integration of \\

  16. Redefining animal signaling: influence versus information in communication

    Microsoft Academic Search

    Michael J. OwrenDrew; Drew Rendall; Michael J. Ryan

    2010-01-01

    Researchers typically define animal signaling as morphology or behavior specialized for transmitting encoded information from a signaler to a perceiver. Although intuitively appealing, this conception is inherently metaphorical and leaves concepts\\u000a of both information and encoding undefined. To justify relying on the information construct, theorists often appeal to Shannon\\u000a and Weaver’s quantitative definition. The two approaches are, however, fundamentally at

  17. Communications satellite systems capacity analysis

    NASA Technical Reports Server (NTRS)

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

    1982-01-01

    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.

  18. The HTV Proximity Communication System

    NASA Astrophysics Data System (ADS)

    Harada, Motoyuki; Takahashi, Tetsuo; Tanaka, Tetsuo

    2002-01-01

    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.

  19. Communication technologies for exascale systems

    NASA Astrophysics Data System (ADS)

    Kash, J. A.; Pepeljugoski, P.; Doany, F. E.; Schow, C. L.; Kuchta, D. M.; Schares, L.; Budd, R.; Libsch, F.; Dangel, R.; Horst, F.; Offrein, B. J.; Vlasov, Y.; Green, W.; Xia, F.; Baks, C. W.; Kwark, Y. H.; Kam, D. G.; Ritter, M. B.

    2009-02-01

    Scaling computing systems to Exaflops (1018 floating point operations per second) will require tremendous increases in communications bandwidth but with greatly reduced power consumption per communicated bit as compared to today's petaflop machines. Reaching the required performance in both density and power consumption will be extremely challenging. Electrical and optical interconnect technologies that may be part of the solution are summarized, including advanced electrical printed circuit boards, VCSEL-array based optical interconnects over multimode fibers or waveguides, and singlemode silicon photonics. The use of optical interconnects will play an ever-larger role in intrasystem communications. Although optics is used today primarily between racks, it will gradually migrate into backplanes, circuit cards, and eventually even on-chip. Keywords: optical interconnects, supercomputers, exascale,

  20. COMMANIMATION : a speech-controlled animation system

    E-print Network

    Kho, Nancy Ellen, 1981-

    2004-01-01

    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 ...

  1. 33 CFR 127.111 - Communications systems.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 2010-07-01 false Communications systems. 127.111 Section...FACILITIES HANDLING LIQUEFIED NATURAL GAS AND LIQUEFIED HAZARDOUS...Facilities Handling Liquefied Natural Gas § 127.111 Communications systems. (a) The...

  2. 46 CFR 130.440 - Communications system.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...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...

  3. 46 CFR 130.440 - Communications system.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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...

  4. 46 CFR 130.440 - Communications system.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...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...

  5. 46 CFR 130.440 - Communications system.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...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...

  6. 46 CFR 130.440 - Communications system.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...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...

  7. 49 CFR 193.2519 - Communication systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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...

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

    E-print Network

    Hays, Graeme

    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

  9. Cognitive radio: Emerging trend of next generation communication system

    Microsoft Academic Search

    Ashwini Dalvi; Pamu Kumar Swamy; B. B. Meshram

    2011-01-01

    The 4 G communication systems are expected to become intelligent enough for communication between different entities. The idea is to extend Shannon's idea of perfect communication system to artificial agent for wireless communication. The internetworking of 3G communication system, cognitive radio, and software defined radio are candidate of 4G communication system. The difference in performance of 4G communication system is

  10. Communication System Architecture for Planetary Exploration

    NASA Technical Reports Server (NTRS)

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

    2001-01-01

    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.

  11. [A wireless communication system for interventional MRI].

    PubMed

    Güttler, F V; Rump, J; Seebauer, C; Teichgräber, U

    2011-01-01

    The available MR-compatible communication systems, which are typically designed for diagnostic exams, are mostly based on tubular sound transmission. In other settings, modern commercially available communication systems with ear protection allow wireless communication in noisy environments. The application of MR-compatible wireless headsets in interventional radiology precludes tube contact with sterile surfaces and hindrance of the interventionalist's range of motion. The system introduced here allows wireless communication within the scanner room without influencing MR image quality. PMID:20972934

  12. Animal Inspired Peripheral Interaction Evaluating a Dog-Tail Interface for Communicating Robotic States

    E-print Network

    -inspired interfaces (e.g., dog ears and tails). Zoological research tells us that dogs can convey a broad rangeAnimal Inspired Peripheral Interaction Evaluating a Dog-Tail Interface for Communicating Robotic they feel, e.g., cats arch their back and dogs show their teeth when angry. We believe that allowing robots

  13. An authorisation procedure for mass-produced farm animal housing systems with regard to animal welfare

    Microsoft Academic Search

    Beat Wechsler

    2005-01-01

    In 1981, an authorisation procedure regarding animal welfare was introduced in Switzerland for mass-produced housing systems and equipment for farm animals. When asking for an authorisation, the manufacturer or importer of a housing system or equipment must send detailed documentation (plans, measures, technical data) to the Federal Veterinary Office. The authorisation can only be given if the housing system or

  14. Animal biocalorimeter and waste management system

    NASA Technical Reports Server (NTRS)

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

    1995-01-01

    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.

  15. PVS0071 Quality assurance and communication on Animal Welfare web-based teaching material, 3.0 credits

    E-print Network

    the quality of online education programs. In: Mc Cracken H (ed) Focus on adult learning...innovation throughPVS0071 Quality assurance and communication on Animal Welfare web- based teaching material, 3 materials; · Communicate on animal welfare issues to central administrations as well as to the young average

  16. Shuttle Communication Systems Compatibility and Performance Testing

    Microsoft Academic Search

    J. Seyl; A. Travis

    1978-01-01

    The Shuttle communications system consists of major space and ground elements. The space elements include the Orbiter, Tracking and Data Relay Satellite, payload and extravehicular astronaut communications subsystems. The Spaceflight Tracking and Data Network, relay satellite ground segment, and the Air Force Satellite Control Facility make up the major ground elements of the communications system. The compatibility and performance of

  17. System Design for Cognitive Radio Communications

    E-print Network

    Arslan, Hüseyin

    System Design for Cognitive Radio Communications Mustafa E. S¸ahin and H¨useyin Arslan Electrical radio communications. In this paper, a comprehensive system design for cognitive radio is presented into the spectrum holes. In cognitive radio communications, one of the major issues is how to share the spectrum

  18. Incentive Constraints and Optimal Communication Systems

    Microsoft Academic Search

    Roger B. Myerson

    1988-01-01

    An example of a sender-receiver game, due to Farrell, is studied to illustrate the role of incentive constraints in the design of optimal communication systems between rational individuals whose interests are not the same. Some noise in the communication system is essential for substantive communication. Informational and strategic incentive constraints are linear, so finding an optimal incentive-compatible mediation plan is

  19. 47 CFR 90.465 - Control of systems of communication.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 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...

  20. [Animals (Animalia) in the system of organisms. 1. Typological systems].

    PubMed

    Shatalkin, A I

    2005-01-01

    Since times of Aristotle animals were considered as a group, opposing to plants. The last were distinguished by two characters. Plants as distinct from animals live the attached way of a life and all nutrients receive from a substratum on which live and from the surrounding air. Animals live an active way of life and exist due to digestion. Fungi at such definition belong to plants. Only in second half of XX centuries due to works of Whittaker and of Tachtadjan fungi have received the separate status equally with plants and animals. In this new system of a plant embraced either oxygenic phototrophs, or photosynthetic eukaryotes. The traditional characters distinguishing animals from plants and fungi are in detail analysed. Many of them appeared formal, not reflecting the structure of relationship. Comparing heterotrophs some authors saw in absorptive nutrition the main difference of fungi from animals. However on mechanisms of receipt of substances in a cell fungi, animals and plants do not differ. Phagocytosis and pinocytosis (clathrin-mediated endocytosis), considered as the most characteristic feature of animals, are revealed both in fungi, and in plants. On photosynthetic activity plants form heterogeneous group, differing on primary and secondary plastids. The last besides have the various origin connected to symbiogenesis of the host cell with red or green algae. Heterotrophy cannot be considered as a uniting attribute of fungi and animals. It is essentially different and focused on diverse food sources. Evolution of animals is connected to perfection of structure of a plasmatic membrane and saturation by its molecules allowing a cell, and through it all organism to be guided in an environment and adequally to be up to external irritants. At a cellular level animals use the various mechanisms of cellular activity connected to moving of cells, their combination in aggregates and complexes or, on the contrary, separation in new cellular configurations. The complex of cellular adaptations connected to the analysis of external signals and adequate response to them of cells, underlies the phenomenon of irritability. At a cellular level irritability is mediated through work of the actin apparatus. Lamarck in "Philosophie zoologique" considered irritability as the main distinctive feature of animals. Evolution of plants and fungi went in a direction of development of a secondary metabolism. The secondary metabolism, concerning synthesis of protective substances, is peculiar to all sedentary organisms, including the animals. PMID:16212279

  1. SRS Computer Animation and Drive Train System

    NASA Technical Reports Server (NTRS)

    Arthun, Daniel; Schachner, Christian

    2001-01-01

    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.

  2. Generic Reactive Animation: Realistic Modeling of Complex Natural Systems

    E-print Network

    Harel, David

    the Rhapsody tool, with its statechart model of the system, to a Flash animation front-end, and enabledGeneric Reactive Animation: Realistic Modeling of Complex Natural Systems David Harel and Yaki their complexity, we developed a technique called reactive animation (RA), which smoothly connects a reactive

  3. Data warehouse for assessing animal health, welfare, risk management and -communication.

    PubMed

    Nielsen, Annette Cleveland

    2011-01-01

    The objective of this paper is to give an overview of existing databases in Denmark and describe some of the most important of these in relation to establishment of the Danish Veterinary and Food Administrations' veterinary data warehouse. The purpose of the data warehouse and possible use of the data are described. Finally, sharing of data and validity of data is discussed. There are databases in other countries describing animal husbandry and veterinary antimicrobial consumption, but Denmark will be the first country relating all data concerning animal husbandry, -health and -welfare in Danish production animals to each other in a data warehouse. Moreover, creating access to these data for researchers and authorities will hopefully result in easier and more substantial risk based control, risk management and risk communication by the authorities and access to data for researchers for epidemiological studies in animal health and welfare. PMID:21999393

  4. Public perception and risk communication in regard to bioterrorism against animals and plants.

    PubMed

    Pearson, G S

    2006-04-01

    This paper examines the total international prohibition on the use of disease to attack humans, animals and plants, noting that in the past several countries had developed programmes for attacks on animals and plants as well as humans. Current activities undertaken by intergovernmental organisations - the World Health Organization (WHO), Food and Agricultural Organization (FAO) and World Organisation for Animal Health (OIE)--to counter the threat of attacks on humans, animals and plants are examined. Effective countermeasures to deliberate attacks need to be developed in harmony with existing measures to control natural or accidental outbreaks of disease. Finally the paper assesses the risk and the public perception of it, and considers what risk communication is needed and to whom. Clear mandates are needed for the FAO and OIE to be prepared to deal with outbreaks of disease, and with contamination of the food supply chain, whether accidental or intentional. PMID:16796037

  5. Microbes and animal olfactory communication: Where do we go from here?

    PubMed

    Ezenwa, Vanessa O; Williams, Allison E

    2014-09-01

    We know that microbes contribute to the production of odors that some animals use to communicate, but how common is this phenomenon? Recent studies capitalizing on new molecular technologies are uncovering fascinating associations between microbes and odors of wild animals, but causality is difficult to ascertain. Fundamental questions about the nature of these unique host-microbe interactions also remain unanswered. For instance, do microbes benefit from signaling associations with hosts? How does microbial community structure influence signal production? How do hosts regulate microbes in order to generate appropriate signals? Here, we review the current state of knowledge on microbially produced signals in animals and discuss key research foci that can advance our understanding of microbial-based signaling in the animal world. PMID:24986361

  6. Dust inhalation system for small laboratory animals.

    PubMed

    Negishi, T; Nishimura, I

    1993-04-01

    In order to stabilize the dust concentration for animal inhalation studies, two feedback systems were introduced. Dusts generated were passed through two cyclone separators and stored first in a storage chamber. Then they were aspirated into an ejector by compressed carrier air, mixed with filtered room air in a mixing box, and introduced into an exposure chamber. The first feedback system was for dust generation. Dusts were reaerosolized by on-off control using the output signals from a light-scattering dust detector connected to a storage chamber. The second system was for the control of compressed carrier air flow into an ejector. Compressed air flow was automatically regulated by a PID-controller in combination with a mass flow controller. The PID-controller processed continuous signals from another dust detector connected to an exposure chamber and fed control signals to a mass flow controller for regulation of the compressed air flow. This automatic control system could not only reduce hunchings of dust concentration following on-off control of a dust generator but also reduce overshooting of dust concentration in the exposure chamber following the detachment and dispersion of dusts adhering to the inner walls of the dust-supplying route. The system could also maintain a desired dust concentration in the exposure chamber for up to 180 days (20 hr/day, 7 days/week). In addition, this system could simultaneously introduce different doses of dust to other exposure chambers stably while maintaining similar size distribution of the dusts if additional identical exposure units were used. These results indicate that this dust inhalation system is suitable both for long-term studies and for investigating a dose-response relationship. PMID:8519290

  7. A Reconfigurable Communications System for Small Spacecraft

    NASA Technical Reports Server (NTRS)

    Chu, Pong P.; Kifle, Muli

    2004-01-01

    Two trends of NASA missions are the use of multiple small spacecraft and the development of an integrated space network. To achieve these goals, a robust and agile communications system is needed. Advancements in field programmable gate array (FPGA) technology have made it possible to incorporate major communication and network functionalities in FPGA chips; thus this technology has great potential as the basis for a reconfigurable communications system. This report discusses the requirements of future space communications, reviews relevant issues, and proposes a methodology to design and construct a reconfigurable communications system for small scientific spacecraft.

  8. Wireless Augmented Reality Communication System

    NASA Technical Reports Server (NTRS)

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

    2014-01-01

    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.

  9. The Aerospace Corporation 2009 Communication Satellite Systems

    E-print Network

    Low, Steven H.

    © 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

  10. A communications interface for systems application architecture

    Microsoft Academic Search

    JACK P. SANDERS; MEL R. JONES; J. E. Fetvedt; MARSHA E. FERREE

    1989-01-01

    The requirements for program-to-program communication that prompted the creation of the communications interface for IBM's Systems Application Architecture (SAA), the considerations that went into the design of its function, and the basic concepts of the interface are discussed. An example of two programs using the Communications Interface is also included. The authors conclude that the evolving SAA Common Programming Interface

  11. A new device for communication systems

    NASA Technical Reports Server (NTRS)

    Beck, R. R.

    1972-01-01

    A communication device and modulation capability were developed for the transmission of digital data or voices from point to point. This device is a fast-switching phase coherent frequency synthesizer. When this synthesizer is appropriately incorporated in a communication system it can provide interference resistance, multiple-user capability, user identification, ranging, navigation, Doppler correction, and digitized communication (voice and data). The application of this device to aircraft/airport complex and law enforcement communications is discussed.

  12. Software-defined Quantum Communication Systems

    SciTech Connect

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

    2013-01-01

    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.

  13. A review of mobile satellite communication systems

    NASA Astrophysics Data System (ADS)

    Kondo, Kimio

    1990-03-01

    This article describes mobile satellite systems in the planning or development stage such as MSAT, AMSC and Geostar and mobile satellite communication experiments such as PRODAT. Studies on the system such as T-SAT are also reviewed. In addition, Japanese ETS-V and ETS-VI are described. The development of mobile-satellite communication systems is promoted along with those of communication and satellite technologies.

  14. Software-defined Quantum Communication Systems

    E-print Network

    Travis S. Humble; Ronald J. Sadlier

    2014-10-20

    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.

  15. 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...

  16. Apollo experience report: Lunar module communications system

    NASA Technical Reports Server (NTRS)

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

    1972-01-01

    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.

  17. Application of RAM to Communication Systems

    Microsoft Academic Search

    Peter J. Kennedy

    1976-01-01

    This paper presents the results achieved by applying Reliability, Availability, Maintainability (RAM) techniques to communication systems over the period 1968-1972. The objective of this program was to guide development of Ground Communication systems and evaluation after deployment. These systems, after field deployment, went through the normal debugging activity. By detection and proper recognition of potential problem areas, corrective action was

  18. Smart Grid Communications System Blueprint

    NASA Astrophysics Data System (ADS)

    Clark, Adrian; Pavlovski, Chris

    2010-10-01

    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.

  19. Animal voice recognition for identification (ID) detection system

    Microsoft Academic Search

    Che Yong Yeo; S. A. R. Al-Haddad; Chee Kyun Ng

    2011-01-01

    Voice recognition systems have become the important applications for speech recognition technology. In this paper, an animal identification (ID) detection system based on animal voice pattern recognition algorithm has been developed. The developed animal voice recognition system uses the zero-cross-rate (ZCR), Mel-Frequency Cepstral Coefficients (MFCC) and Dynamic Time Warping (DTW) joint algorithms as the tools for recognizing the voice of

  20. Communication architecture of an early warning system

    NASA Astrophysics Data System (ADS)

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

    2010-11-01

    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.

  1. AGRICULTURAL WATER USE ASSOCIATED WITH ANIMAL PRODUCTION SYSTEMS IN GEORGIA

    Microsoft Academic Search

    G. L. Newton; J. F. Baker; C. R. Dove; J. K. Bernard; M. D. McCranie; V. J. Boken; D. L. Thomas; G. Hoogenboom

    Agricultural waters use normally centers on the large cross-section of irrigation withdrawals by cropping systems. However, animal production systems are also a significant component of water use in the state of Georgia. These production systems are therefore directly affected by the continuing drought and limited availability of water. Many animal production facilities, such as dairies, poultry houses, processing plants, and

  2. Reactive animation: From piecemeal experimentation to reactive biological systems

    E-print Network

    Harel, David

    Reactive animation: From piecemeal experimentation to reactive biological systems ODED VAINAS1 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

  3. Educational systems need appropriate animations and simulations Ruddy LELOUCHE

    E-print Network

    Paris-Sud XI, Université de

    . Besides games, another important use of animations is educational systems, where they have a widerEducational systems need appropriate animations and simulations Ruddy LELOUCHE Département d contends that, in educational systems, these should be used only if they are related to the subject

  4. COSMOS: a codesign approach for communicating systems

    Microsoft Academic Search

    Tarek Ben Ismail; Mohamed Abid; Ahmed Amine Jerraya

    1994-01-01

    This paper presents COSMOS, a method for modeling and synthesis of complex communicating systems. COSMOS starts from a system-level specification based on an extended finite state machine model allowing for the specification of complex protocols. System-level synthesis is composed of three tasks: partitioning systems into inter-dependent sub-systems, inter-sub-system communication synthesis and architecture generation. The output is a flexible architecture model

  5. Hierarchical implementation of a wireless communications system

    E-print Network

    Mayhugh, Terry L

    2000-01-01

    in this thesis can assist the mixed-signal system designer in determining engineering requirements and verifying proper system operation. V TABLE OF CONTENTS Volume I I INTRODUCTION . . Page 1. 1 Wireless Communications Systems. 1. 2 Hierarchical... Implementafion Method. 1. 3 Literature Survey. 2 9 11 II TRANSCEIVER SYSTEM-LEVEL DESIGN AND MODELING. . . . . . 15 2. 1 2. 2 2. 3 2. 4 The Personal Communications System. System Specifications . 15 19 Wireless Communicafions Channel Description...

  6. Wireless Augmented Reality Communication System

    NASA Technical Reports Server (NTRS)

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

    2015-01-01

    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.

  7. Systems and Methods for Radar Data Communication

    NASA Technical Reports Server (NTRS)

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

    2013-01-01

    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.

  8. Computer Animation System Based on Rough Sets and Fuzzy Logic

    Microsoft Academic Search

    Piotr Szczuko

    2010-01-01

    \\u000a A fuzzy logic inference system was created, based on the analysis of animated motion features. The objective of the system\\u000a is to facilitate the creation of high quality animation by analyzing personalized styles contained in numerous animations.\\u000a Sequences portraying a virtual character acting with a differentiating personalized style (natural or exaggerated) and various\\u000a levels of fluidity were prepared and subjectively

  9. EHF satellite communication systems for mobile users

    Microsoft Academic Search

    R. E. Eaves

    1979-01-01

    The large amounts of spectrum available in the EHF and upper SHF region offer the potential to provide secure satellite communications to large numbers of users. However, the cost-effective realization of this potential requires the development of satellite communication system architectures which will serve small and relatively inexpensive terminals. Conventional transponder systems are inadequate both in the security they provide

  10. Architectural trends in military satellite communications systems

    Microsoft Academic Search

    P. C. Jain

    1990-01-01

    A historical overview of military communications by satellites and a detailed description of current systems are provided. The capabilities of present systems are reviewed in relation to user requirements and threats. It is concluded that use of satellite communications by a large number of small-terminal users (aircraft, ships, submarines, and land mobiles) still requires major technological innovations to meet needs

  11. An Overview of SDMA in Communications Systems

    Microsoft Academic Search

    Iclia Villordo-Jimenez; Ignacio E. Zaldivar-Huerta; G. M. Galvan-Tejada

    2006-01-01

    Space Division Multiple Access (SDMA) is a technology that permits the increase of capacity and performance of communications systems. In this paper, the main characteristics, advantages, disadvantages and the effects of the use of SDMA on a communication system are showed. Additionally an overview of smart antenna technology is given.

  12. How do communication systems emerge?

    PubMed Central

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

    2012-01-01

    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

  13. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    . Maguire Jr School of Information and Communication Technology Royal Institute of Technology (KTH forskningsprojekt har undersökt detta område finns det fortfarande några utmaningar som återstår, framför allt i

  14. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    of Information and Communication Technology Stockholm, Sweden Examiner: Professor Gerald Q. Maguire Jr. NTNU som krävs. Trots att det finns många olika automatiserade verktyg för penetrationstestning, väljer

  15. Using multiple attractor chaotic systems for communication.

    PubMed

    Carroll, T. L.; Pecora, L. M.

    1999-06-01

    In recent work with symmetric chaotic systems, we synchronized two such systems with one-way driving. The drive system had two possible attractors, but the response system always synchronized with the drive system. In this work, we show how we may combine two attractor chaotic systems with a multiplexing technique first developed by Tsimring and Suschick to make a simple communications system. We note that our response system is never synchronized to our drive system (not even in a generalized sense), but we are still able to transmit information. We characterize the performance of the communications system when noise is added to the transmitted signal. PMID:12779841

  16. An advanced, low cost, GPS-based animal tracking system

    Technology Transfer Automated Retrieval System (TEKTRAN)

    An improved GPS-based animal tracking system is needed to meet quickly-evolving ecological research and natural resource management demands. Commercially-available tracking systems lack the data storage capacity needed to frequently collect animal location data (e.g., at less than 5-minute interval...

  17. Development of a Small-Animal PET System

    Microsoft Academic Search

    SIBYLLE I. ZIEGLER

    2005-01-01

    Developments in small-animal positron emission tomography (PET) technology aim at reaching spatial resolution in the submillimeter range and increasing the system sensitivity. Various detector schemes have been implemented in complete tomographic systems for in vivo animal imaging. These include small scintillation crystals read out by multichannel-photomultiplier tubes with optical fibers to guide the light, phoswich detectors, and direct coupling of

  18. ETS-VI multibeam satellite communications systems

    NASA Astrophysics Data System (ADS)

    Kawai, Makoto; Tanaka, Masayoshi; Ohtomo, Isao

    1989-10-01

    The fixed and mobile satellite communications systems of the Japanese Engineering Test Satellite-VI (ETS-VI) are described. The system requirements are outlined along with the system configuration. The ETS-VI multibeam system employs three frequency bands. When used for Ka-band fixed communications, it covers the Japanese main islands with thirteen 0.3-degree-wide spot beam. Four of the beams are active for ETS-VI. When used for S-band mobile communications, five beams cover the area within 200 nautical miles from the Japanese coast. The C-band beam for fixed communications covers the central area of the Japanese main islands with a single beam. The onboard antenna system is described along with the transponders and their associated onboard systems. A discussion of the system technology follows, covering the TDMA transmisssion system, the relay function, rainfall compensation, and the antenna and propagation performance.

  19. Animator

    ERIC Educational Resources Information Center

    Tech Directions, 2008

    2008-01-01

    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…

  20. Simultaneous use of different communication mechanisms leads to spatial sorting and unexpected collective behaviours in animal groups.

    PubMed

    Eftimie, Raluca

    2013-11-21

    Communication among individuals forms the basis of social interactions in every animal population. In general, communication is influenced by the physiological and psychological constraints of each individual, and in large aggregations this means differences in the reception and emission of communication signals. However, studies on the formation and movement of animal aggregations usually assume that all individuals communicate with neighbours in the same manner. Here, we take a new approach on animal aggregations and use a nonlocal mathematical model to investigate theoretically the simultaneous use of two communication mechanisms by different members of a population. We show that the use of multiple communication mechanisms can lead to behaviours that are not necessarily predicted by the behaviour of subpopulations that use only one communication mechanism. In particular, we show that while the use of one communication mechanism by the entire population leads to deterministic movement, the use of multiple communication mechanisms can lead in some cases to chaotic movement. Finally, we show that the use of multiple communication mechanisms leads to the sorting of individuals inside aggregations: individuals that are aware of the location and the movement direction of all their neighbours usually position themselves at the centre of the groups, while individuals that are aware of the location and the movement direction of only some neighbours position themselves at the edges of the groups. PMID:23938233

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

    PubMed Central

    2011-01-01

    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

  2. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    with an NFC interface Smart Door Lock KTH Information and Communication Technology #12;Smart Door Lock A first prototype of a networked power lock controller with an NFC interface Rafid Karim and Haidara Al-Fakhri 2013 cell phone manufacturers have been releasing cell phones equipped with Near Field Communication (NFC

  3. Non-verbal Communication System Using Pictograms

    Microsoft Academic Search

    Makiko Okita; Yuki Nakaura; Hidetsugu Suto

    2009-01-01

    A system is described that uses pictograms to support interactive non-verbal communication. While pictograms are typically\\u000a used with objects, this system uses them for events as well. Moreover, whereas communication systems using pictograms are\\u000a generally designed for people with disabilities, this system is designed for people in general. It can thus be used between\\u000a a non-disabled person and a person

  4. Roadside-based communication system and method

    NASA Technical Reports Server (NTRS)

    Bachelder, Aaron D. (Inventor)

    2007-01-01

    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.

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

    E-print Network

    -mounted display virtual reality is useful for researching the influence of body gestures in communication; and (b, the studies show how (a) virtual reality can be used to systematically study the influence of body gesturesTalk to the Virtual Hands: Self-Animated Avatars Improve Communication in Head-Mounted Display

  6. Heparin clearance during excitation of the anticlotting system in animals

    Microsoft Academic Search

    A. M. Ul'yanov

    1978-01-01

    During excitation of the anticlotting system (by means of thrombin) in animals the clearance of [35S]heparin from the blood is delayed. The half-life of [35S]heparin increases under these circumstances from 1.6 h in control animals to 2.35 h in animals receiving intravenous injections of threshold doses of thrombin. The slowing of [35S]heparin clearance from the blood during excitation of the

  7. Animations

    NSDL National Science Digital Library

    Christopher Griffith

    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.

  8. Electromagnetic Characterization of MIMO Communication Systems

    E-print Network

    Heath Jr., - Robert W.

    electromagnetic simulation method­ ology is proposed that accounts for both near­field and far­field interactionsElectromagnetic Characterization of MIMO Communication Systems Kapil R. Dandekar, Sumant Kawale communication has fueled interest in spectrum­ e#cient multiple­input multiple­output (MIMO) wireless

  9. Electromagnetic Characterization of MIMO Communication Systems

    E-print Network

    Dong, Liang

    electromagnetic simulation method- ology is proposed that accounts for both near-field and far-field interactionsElectromagnetic Characterization of MIMO Communication Systems Kapil R. Dandekar, Sumant Kawale communication has fueled interest in spectrum- efficient multiple-input multiple-output (MIMO) wireless

  10. How to Bootstrap a Human Communication System

    ERIC Educational Resources Information Center

    Fay, Nicolas; Arbib, Michael; Garrod, Simon

    2013-01-01

    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…

  11. Fractional chaos based communication systems —an introduction

    Microsoft Academic Search

    Juebang Yu

    2008-01-01

    As one of secure communication means, chaotic communication systems has been well-developed during the past three decades. Technical papers, both for theoretical and practical investigations, have reached a huge amount in number. On the other hand, fractional chaos, as a parallel ongoing research topic, also attracts many researchers to investigate. As far as the IT field is concerned, the research

  12. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    . Gerald Q. Maguire Jr. KTH Royal Institute of Technology School of Information and Communication.11, Smartphone, Battery life #12;#12;iii Sammanfattning Enligt beräkningar så finns det nu mer än 1.08 miljarder

  13. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    and Examiner: Professor Gerald Q. Maguire Jr. School of Information and Communication Technology KTH Royal spektrumet. Därför finns det ett behov av att uppskatta användningen av radiospektrum i flera platser och i

  14. Emerging infectious diseases and animal social systems

    Microsoft Academic Search

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

    2008-01-01

    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

  15. 21 CFR 890.3700 - Nonpowered communication system.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... PHYSICAL MEDICINE DEVICES Physical Medicine Prosthetic Devices § 890.3700 Nonpowered communication system. (a) Identification. A nonpowered communication system is a mechanical device intended for...

  16. GraphAEL: Graph Animations with Evolving Layouts (System Demo)

    E-print Network

    Kobourov, Stephen G.

    GraphAEL: Graph Animations with Evolving Layouts (System Demo) C. Erten, P. J. Harding, S. G,harding,kobourov,wamplerk,gyee}@cs.arizona.edu Abstract. GraphAEL extracts three types of evolving graphs from the Graph Draw- ing literature and creates 2D and 3D animations of the evolutions. We study cita- tion graphs, topic graphs, and collaboration

  17. Satellite multiple access systems for mobile communication

    NASA Technical Reports Server (NTRS)

    Lewis, J. L.

    1979-01-01

    This paper considers multiple access techniques for a mobile radio system which incorporates a geosynchronous orbiting satellite repeater through which mobile terminals communicate. The communication capacities of FDMA, TDMA and CDMA systems are examined for a 4 MHz bandwidth system to serve up to 10,000 users. An FDMA system with multibeam coverage is analyzed in detail. The system includes an order-wire network for demand-access control and reassignment of satellite channels. Satellite and terminal configurations are developed to a block diagram level and system costs and implementation requirements are discussed.

  18. Satellite communication system integrated into terrestrial ISDN

    Microsoft Academic Search

    TORU OTSU; KAZUHIRO NAGAYAMA; AKIRA KUROKAWA; HIROSHI NAKASHIMA; MASAHIRO UMEHIRA

    2000-01-01

    This paper presents an advanced satellite communication system named DYANET II. This system uses satellite channels as subscriber lines for ISDN customers as well as trunk circuits for overflow traffic. The system can offer the same ISDN services to satellite customers as those available to terrestrial subscribers in terms of numbering, signaling, and charging systems as well as user-network interfaces.

  19. EDUCATIONAL COMMUNICATIONS SYSTEM--PHASE III.

    ERIC Educational Resources Information Center

    WITHERSPOON, JOHN P.; AND OTHERS

    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

  20. Systems Theory and Communication. Annotated Bibliography.

    ERIC Educational Resources Information Center

    Covington, William G., Jr.

    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)

  1. Design for communications center monitor & control system

    Microsoft Academic Search

    Zhigang Lv; Cuixia Liu

    2010-01-01

    Communications center monitor & control system, including power supply sub-system, environment sub-system, fire sub-system, security sub-system and so on, is widely used in school, enterprise, government and other areas. The control system designed by this paper can get temperature and humidity information from RS485 sensor of temperature-humidity. From measuring gate sensor, smoke sensor and leak-water senor, the control system can

  2. 47 CFR 90.465 - Control of systems of communication.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...of systems of communication. 90.465...Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED...SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Transmitter...of systems of communication. (a)...

  3. Graphics and animation in expert systems for language tutoring

    Microsoft Academic Search

    G. Sampath

    1988-01-01

    The use of artificial intelligence in language tutoring systems is in its present state largely based on syntax and semantics processing. In the work reported here, an attempt has been made to use animated graphics in such systems. Such an extended system uses a combination of objects and motions in a manner resembling the primitives in Schank's conceptual system. Graphics

  4. Animation of the Origin of the Solar System

    NSDL National Science Digital Library

    TERC, Center for Earth and Space Science Education

    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.

  5. Space Station Freedom communications systems compatibility and performance testing

    Microsoft Academic Search

    T. P. Kelly; J. S. Grimes

    1993-01-01

    Communication systems play an essential role in all long duration space missions. Because of this essential role, a spacecraft's communication system must be tested. The Electronic Systems Test Laboratory (ESTL) at the Johnson Space Center provides a facility for verifying the operation of spacecraft communications systems. This paper discusses the ESTL test plans for the Space Station Freedom communications systems

  6. Mitochondria and Chloroplasts Shared in Animal and Plant Tissues: Significance of Communication

    PubMed Central

    Snyder, Christopher; Stefano, George B.

    2015-01-01

    Mitochondria have long been recognized as the main source of energy production for the eukaryotic cell. Recent studies have found that the mitochondria have a variety of dynamic functions aside from the production of energy. It communicates bidirectionally with other organelles in order to modulate its energy balance efficiently, as well as maintain homeostasis, ultimately prolonging its own and the cell’s longevity. The mitochondria achieves this level of regulation via specific and common bidirectional chemical messengers, especially involving the endoplasmic/sarcoplasmic reticulum (ER/SR), deoxyribonucleoside triphosphates (dNTP’s), ATP and the generation of reactive oxygen species (ROS). Its communication network is also involved in stress associated events. In this regard, the activation of the Bax family proteins and the release of cytochrome c occurs during cellular stress. The communication can also promote apoptosis of the cell. When mitochondrial abnormalities cannot be dealt with, there is an increased chance that major illnesses like type 2 diabetes, Alzheimer’s disease, and cancer may occur. Importantly, functioning chloroplasts can be found in animals, suggesting conserved chemical messengers during its evolutionary path. The dynamic capacity of mitochondria is also noted by their ability to function anaerobically. Indeed, this latter phenomenon may represent a return to an earlier developmental stage of mitochondria, suggesting certain disorders result from its untimely appearance. PMID:26005853

  7. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    H A M Security of NFC applications KTH Information and Communication Technology #12;Aalto University School of Science Degree Programme in Security and Mobile Computing Thi Van Anh Pham Security of NFC Computing ABSTRACT OF MASTER'S THESIS Author: Thi Van Anh Pham Title: Security of NFC applications Date

  8. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    and Examiner: Gerald Q. Maguire Jr. School of Information and Communication Technology KTH Royal InstituteIP traffik. Det finns många faktorer att bejaka för både IP leverantörer och telecom carriers för att supervisor Prof. Gerald Q. Maguire Jr. for guiding and assisting me from the beginning of my thesis till its

  9. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    . Gerald Q. Maguire Jr. School of Information and Communication Technologies KTH Royal Institute breda tillgången på Röst över IP (VoIP) tjänster dessa tjänster används av nästan alla. Idag finns det många VoIP-applikationer som finns på marknaden, men de flesta av dem saknar grundläggande

  10. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    and Examiner: Prof. Gerald Q. Maguire Jr School of Information and Communications Technology Royal Institute-adresser är den största anledningen till att IPv6 behövs så finns det andra faktorer som också spelar in. IPv6 of many people. We would like to express our gratitude towards Professor Gerald Q. Maguire Jr

  11. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    to users who want to use and control sensors. Those users can flexibly use their web browser to access Server for Sensors KTH Information and Communication Technology #12;A Web Server for Sensors Ye Tian 2011 This thesis describes the project "A new Web Server for sensors". The project has created a demonstration web

  12. Software-defined Quantum Communication Systems

    SciTech Connect

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

    2014-01-01

    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.

  13. Vessel movement influences offshore communications system design

    SciTech Connect

    Holcomb, S.R. [Brown and Root Inc., Houston, TX (United States); Burger, S.D. [Amoco Orient Production Co., Chiwan (China)

    1996-05-27

    Communications links for the Liuhua 11-1 oil production project, offshore China, required a system that would function with vessel movement under typhoon conditions of heavy rainfall and extreme wave action. The system includes a microwave path between two floating production facilities and a satellite connection between the offshore facilities and onshore China. The system provides multiple local-area-network (LAN) linkages, and voice with fax in English and Chinese. The satellite link has a geostabilized platform offshore and a China National Offshore Oil Corp. master earth station onshore. System operations started in mid-1995. This paper reviews the design and performance of this communications network.

  14. Early Communication System (ECOMM) for ISS

    NASA Technical Reports Server (NTRS)

    Gaylor, Kent; Tu, Kwei

    1999-01-01

    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.

  15. Degree project in Communication Systems

    E-print Network

    Maguire Jr., Gerald Q.

    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

  16. Full-duplex optical communication system

    NASA Technical Reports Server (NTRS)

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

    2004-01-01

    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.

  17. Modelling and Evaluating Verbal and Non-Verbal Communication in Talking Animated Interface Agents

    Microsoft Academic Search

    Björn Granström; David House

    The use of animated talking agents is a novel feature of many multimodal experimental spoken dialogue systems. The addition\\u000a and integration of a virtual talking head has direct implications for the way in which users approach and interact with such\\u000a systems. Established techniques for evaluating the quality, efficiency, and other impacts of this technology have not yet\\u000a appeared in standard

  18. COMPUTER VIRUS EDUCATIONAL SYSTEM USING ANIMATED PEDAGOGICAL AGENT TECHNOLOGY

    Microsoft Academic Search

    Zasriati Azla Sabot; Abdul Razak; Iznora Aini Zolkifly; Tan Teik Lew

    This paper describes a framework for practical application of interface agent technology as means of solving some persistent problems in educational environments. The system has been developed is called a Computer Virus Educational System Using Animated Pedagogical Agent or CAPA. CAPA will cover range of subjects from learning the basics computer virus to handling and management of computer system in

  19. RFID for Cattle Traceability System at Animal Checkpoint

    Microsoft Academic Search

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

    2011-01-01

    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

  20. Animal eyes in homeland security systems

    NASA Astrophysics Data System (ADS)

    Jannson, Tomasz; Kostrzewski, Andrew; Gertsenshteyn, Michael; Grubsky, Victor; Shnitser, Paul; Agurok, Ilya; Bennahmias, Mark; Lee, Kang; Savant, Gajendra

    2007-04-01

    In this paper, biologically-inspired optical imaging systems, including fish eye, bug eye, lobster eye, and RGB color vision, are discussed as new lensing systems for military and homeland security applications. This new area of interest includes UV, VIS, IR, and X-ray part of electromagnetic spectrum. In particular, recent progress at Physical Optics Corporation will be discussed, including such applications as hyperspectral/multi-spectral imagery, video surveillance, and X-ray inspection.

  1. An Investigation of the Impact of Electronic Communication Systems on Organizational Communication Patterns

    Microsoft Academic Search

    Robert B. Mitchell; Marian C. Crawford; R. Burt Madden

    1985-01-01

    This article presents the results of a study designed to determine the effects of computerized electronic communication systems on organizational communication and the concepts and competencies which should be stressed in preparing students for an electronic communication environment. Data were collected from Association for Business Communication members and Office Systems Research Association members. Analyses resulted in the development of a

  2. LA PLATEFORME DE COMMUNICATION ALTERNATIVE : UN SYSTEME D'AIDE A LA COMMUNICATION

    E-print Network

    Boyer, Edmond

    logiciel d'aide à la communication verbale et non-verbale caractérisé par l'homogénéité de son utilisation the user in verbal and non-verbal communication. The homogeneity of the system warrants a comfortableLA PLATEFORME DE COMMUNICATION ALTERNATIVE : UN SYSTEME D'AIDE A LA COMMUNICATION POUR PERSONNES

  3. Telecom 1: French domestic communications satellite system

    NASA Astrophysics Data System (ADS)

    1981-05-01

    Services supplied by TELECOM 1, the components of the TELECOM 1 system, the industrial organization, and the project schedule are described. The TELECOM 1 system: provides broadband digital links between companies in France and neighboring states; routes telephone communications and television broadcasts between France and its overseas territories; and handles government communications. A ground control and monitoring station operates the TDMA system and supervises ground station performance, synchronizes the bursts from each station, surveys the repeaters and provides the billing. Three satellites, including one spare, developed from OTS, MARECS and ECS designs, are launched by Ariane.

  4. Animal Disease Diagnoses Expert System Based on SVM

    Microsoft Academic Search

    Long Wan; Wenxing Bao

    2009-01-01

    \\u000a Livestock breeding farms usually distribute in remote areas, with relatively poor condition of disease diagnosis. Generally,\\u000a it is hard to carry out disease diagnosis rapidly and accurately. But the farms can diagnose animal disease quickly and accurately\\u000a by the animal disease diagnoses expert system. It could ensure a sound development of the stockbreeding industry. This paper\\u000a proved the practicality of

  5. Modulation scaling for Energy Aware Communication Systems

    Microsoft Academic Search

    Curt Schurgers; Olivier Aberthorne; Mani B. Srivastava

    2001-01-01

    In systems that require low energy consumption, voltage scaling is an invaluable circuit technique. It also offers energy awareness, trading off energy and performance. In wireless handheld devices, the communication portion of the system is a major power hog. We introduce a new technique, called modulation scaling, which exhibits benefits similar to those of voltage scaling. It allows us to

  6. State Restoration in Systems of Communicating Processes

    Microsoft Academic Search

    David L. Russell

    1980-01-01

    In systems of asynchronous processes using messagelists with SEND–RECEIVE primitives for interprocess communication recovery primitives are defined to perform state restoration: MARK saves a particular point in the execution of the program; RESTORE resets the system state to an earlier point (saved by MARK); and PURGE discards redundant information when it is no longer needed for possible state restoration.

  7. Liquid crystal devices for optical communication systems

    Microsoft Academic Search

    V. G. Chigrinov; E. P. Pozhidaev; D. A. Yakovlev; H. S. Kwok

    2003-01-01

    Liquid crystals (LCs) prove to be the basic material for various applications in electronic imaging and displays as well as optoelectronics. We will review the following LC optoelectronic devices for optical communication systems. 1. Fast reliable low power optical switches. We shall demonstrate the new possible configurations of the fast LC shutters for fiber-optical system, based on (i) STN-LCD cell

  8. Expert system to design communications circuits

    SciTech Connect

    Tolendino, L.F.; Vahle, M.O.

    1986-07-01

    An expert system has been created to aid the design of fiber optic based communications circuits. The design system is based on an Apollo workstation, LISP and CPSL, an in-house developed expert system language. The optical circuit is taken from design specification through hardware selection and circuit routing to the production of detailed schematics and routing guides. A database containing the entire fiber optic trunk system is also maintained.

  9. A 1000+ Channel Bionic Communication System

    Microsoft Academic Search

    Joseph H. Schulman; J. Phil Mobley; James Wolfe; Howard Stover; Adrian Krag

    2006-01-01

    The wireless electronic nervous system interface known as the functional electrical stimulation-battery powered bionreg system is being developed at the Alfred Mann Foundation. It contains a real-time propagated wave micro-powered multichannel communication system. This system is designed to send bi-directional messages between an external master controller unit (MCU), and each one of a group of injectable stimulator-sensor battery powered bionreg

  10. Wideband CDMA system for personal radio communications

    Microsoft Academic Search

    A. Fukasawa; T. Sato; Y. Takizawa; T. Kato; N. Kawabe; R. E. Fisher

    1996-01-01

    This article describes a wideband spread code-division multiple access (W-CDMA) system for high-capacity and high-quality personal radio communication. This system has been authorized as an EIA\\/TIA Interim Standard IS-665, T1P1 Trial Use Standard J-STD-015, and ITU-R Recommendation M 1073. The system uses wideband spreading to accomplish good interference immunity, high-quality speech, and high-speed data transmission. The system uses coherent detection

  11. MCPC system and terminal equipment for satellite communication

    Microsoft Academic Search

    T. Saruwatari; K. Yamada; T. Takahashi; S. Isobe; M. Iguchi; H. Ohashi; I. Nishiyama; S. Tsuchiya

    1982-01-01

    In a domestic satellite communication system, small capacity communication links using small-sized earth stations are required for thin routes. At Radio Research Laboratories, the Multi-Channel Per Carrier (MCPC), a small capacity satellite communication system, has been proposed and successfully developed in the Medium Capacity Communications Satellite for Experimental Purposes (CS) experimental project. The operation of the MCPC system is similar

  12. Communication Simulations for Power System Applications

    SciTech Connect

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

    2013-05-29

    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.

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

    E-print Network

    de Weck, Olivier L.

    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

  14. Optical System in Laser Inter-Satellites Communication

    Microsoft Academic Search

    Zhou Li; Wen Chuanhua; Liu Baoming

    2008-01-01

    We know that Inter-satellites communication is a very important to us. However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network. The traditional satellites communication and inter-satellites links are built by microwave. Recent years, laser links for inter-satellites communication are becoming more and more important.

  15. A combined optical wireless indoor communication system

    NASA Astrophysics Data System (ADS)

    Berceli, Tibor

    2007-10-01

    This new combined optical-wireless indoor communication system provides an economic and flexible approach for local area networks mainly in large buildings or in a group of several buildings. The radiation from the radio base stations of mobile networks cannot penetrate into large buildings completely. That problem is more serious at higher frequencies. The present approach offers a good solution to this problem. In this approach the wireless communication serves small picocells which are interconnected by an optical backbone. The performance of the system is enhanced by assigning a specific radio frequency for each picocell which enables the transmission of the wireless channels without altering their modulation formats. This method allows for a simple, and low-cost indoor communication system.

  16. Molecular Communication - A Biochemically-Engineered Communication System

    Microsoft Academic Search

    Yuki Moritani; Satoshi Hiyama; Tatsuya Suda

    2007-01-01

    Molecular communication uses molecules (i.e., chemical signals) as an information carrier and allows biological and artificially-created nano- or cell-scale devices to communicate over a short distance. It is a new communication paradigm and is different from the existing communication paradigm that uses electromagnetic waves (i.e., electronic and optical signals) as an information carrier. Key research challenges in molecular communication include

  17. Nigari System Environment where Students Learn Programming by Creating Animations

    Microsoft Academic Search

    Shinya Cho

    2003-01-01

    There are too many things to learn when novice students develop programs in well-known languages, such as Java or C. To support learning programming languages, we developed Nigari System, a programming environment. The language is simpler than usual ones, and the developing environment enables students make attractive applications, animations or games. As an experiment, we applied Nigari System for a

  18. SQUID-Based Low Field MRI System for Small Animals

    Microsoft Academic Search

    Junichi Hatta; Masakazu Miyamoto; Yoshiaki Adachi; Jun Kawai; Gen Uehara; Hisashi Kado

    2011-01-01

    Low field MRI and MEG are based on the ability of SQUID sensors to detect femtotesla magnetic fields. We are now developing a low field MRI system which can be integrated with the MEG system for small animals. The fast switching of the po- larizing field inherently induces large transient signals in low field MRI experiments. We have optimized our

  19. A real-time photoacoustic tomography system for small animals

    E-print Network

    Wang, Lihong

    , M. Jaeger, R. Lemor, P. Weber, and M. Frenz, "Combined ultrasound and optoacoustic system for real-element photoacoustic tomography system for small animal imaging using a ring ultrasound array has been of the microvasculature with a high-frequency ultrasound array transducer," J. Biomed. Opt. 12(1), 010501 (2007). 3. X

  20. Communication Capacity Optimization for Broadband Satellite Communication Systems

    NASA Astrophysics Data System (ADS)

    Nakasuga, Yoshinori; Mitsugi, Jin; Ueba, Masazumi; Mizuno, Hideki

    2002-01-01

    ground-based access systems, such as FTTH, ADSL and even terrestrial cellular systems, are only available within limited geographical areas, broadband satellite communication systems that can cover unlimited service area have attracted wide interest. However, the success of broadband satellite communication depends heavily on the cost of user terminals and satellite circuits. and frequency bandwidth, which involves design parameters. For such parameters, we must consider modulation, coding, the number of radiating beams and the number of areas in which frequency bandwidth can be reused. These parameters should be chosen such that maximum communication capacity can be provided with minimum system resources under a designated rain attenuation and interference environment. The difficulty in optimization stems from the number of design parameters and the interactions between them. The optimization also has to be done in a manner such that the service provider can determine the relation between the service cost and the service grade. The service grade can be expressed in terms of the available user information rate, return link as well as forward link, and the number of available communication channels, while the system cost can be expressed in terms of required satellite power and the bandwidth. power and bandwidth parameters. In the method, the number of spot beams, the number of repeated bandwidth areas and the type of modulation are separately determined for the return and forward link. From the selected design parameters, the relationship between bandwidth capacity and power capacity is derived assuming they are linear. The power and bandwidth required for the return and forward link are then integrated by applying a linear programming method. The constraints in linear programming are power and bandwidth. To denote the system resource management proficiency, we introduce an index called power-utilization efficiency, which is a ratio of the maximum capacity to the required power. systems that have 15 or 35 spot beams. Since circuit quality degradation in Ku band systems due to the propagation environments is less than that in Ka band systems, the power-utilization efficiency of the Ku band is 1.25 times more that of the Ka band. On the other hand, the total capacity of the Ka band is 3.5 times that of the Ku band since the allocated bandwidth in the Ku band is narrower than that of the Ka band. Bandwidth reuse is an effective way to increase total available bandwidth. For the same service area and the same number of reused bandwidths, increasing the number of spot beams can reduce the interference between different areas assigned the same frequency, since the distance between those areas widens. This enables total capacity and power-utilization efficiency for a 35-spot-beam system to be more than 2.2 and 2.75 times greater, respectively, than for a 15-spot-beam system. limited transmission power of the user terminal. Therefore, the return link transponder requires a higher transmission power level to compensate for this limitation. On the other hand, a high-quality downlink is also required for the forward link because of the small size of the user terminal antenna. However, the quality of the forward link can be maintained since it is possible to increase uplink quality by improving hub-station performance. This makes it possible to suppress the increase in the transmission power of the forward link transponder in comparison with that of the return link transponder. As an example, we compared two cases, in one of which the capacity ratio (forward link capacity divided by the return link capacity) was 2.0 and in the other of which it was 10.0. We found that the amount of capacity and power utilization efficiency were, respectively, 33% and 50% greater for the latter case than for the former case. applications.

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

    PubMed Central

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

    2011-01-01

    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

  2. Optical communication systems for satellite applications

    NASA Astrophysics Data System (ADS)

    Suter, Joseph J.

    1999-07-01

    In conventional satellites, the RF and microwave signal transmissions between electronic modules are accomplished using waveguide or coaxial lines. Advances in fiber-optic technology have made it possible to modulate low-noise RF and microwave signal on fiber-optic distribution lines, resulting in weight and space savings. These optical communication systems enable intrasatellite communications among the electronic modules like transmitters, receivers, and clocks. This paper summarizes findings from several studies on the use of fiber-optic lines for RF/microwave signal transmission on-board satellites. It will also update some experimental results of prototype systems developed previously for intrasatellite signal distribution.

  3. Communication Theory of Secrecy Systems?

    Microsoft Academic Search

    C. E. SHANNON

    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,

  4. Evolution of a radio communication relay system

    NASA Astrophysics Data System (ADS)

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

    2013-05-01

    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.

  5. Integrated Formation Optical Communication and Estimation System

    NASA Technical Reports Server (NTRS)

    Scharf, Daniel; Kuhnert, Andreas; Kovalik, Joseph; Hadaegh, Fred; Shaddock, Daniel

    2008-01-01

    An architecture has been designed that integrates formation estimation methodologies, precision formation sensing, and high-bandwidth formation communication into a robust, strap-on system that meets knowledge and communication requirements for the majority of planned, precision formation missions. Specifically, the integrated system supports (a) sub-millimeter metrology, (b) multiple greater than 10 Mbps communication channels over a large, 10 deg field-of-view (FOV), and (c) generalized formation estimation methodologies. The sensing sub-system consists of several absolute, metrology gauges with up to 0.1 mm precision that use amplitude-modulated lasers and a LISA-heritage phase meter. Since amplitude modulation is used, inexpensive and robust diode lasers may be used instead of complex, frequency-stabilized lasers such as for nanometer-level metrology. The metrology subsystem laser transceivers consist of a laser diode, collecting optics, and an avalanche photo diode (APD) for detecting incoming laser signals. The APD is necessary since received power is small due to the large (for optical applications) FOV. The phase meter determines the phase of the incoming amplitude modulations as measured by the APD. This phase is equivalent to time-of-flight and, therefore, distance. By placing three laser transceivers on each spacecraft, 18 clock-offset-corrupted distances are calculated. These measurements are communicated and averaged to obtain nine correct distances between the transceivers. From these correct distances, the range and bearing between spacecraft and their relative attitude are determined. Next, communication is integrated on the laser carrier through spectral separation. Metrology amplitude modulations are limited to the 45-50 MHz band, leaving 0-45 MHz for communication. Through careful design of coding scheme, error correction, and filters, six independent 10 Mbps receive channels are possible. Hence, a spacecraft can simultaneously broadcast at 10 Mbps and listen to six other spacecraft. The integrated sensing and communication architecture has been developed, as have formation estimation methodologies that allow the sensing topology to reconfigure as spacecraft maneuver. A bench-top implementation of the integrated sensing and communication architecture is in progress. The final, multiple sensing/communication systems will be tied together via formation estimation algorithms that are also undergoing further development.

  6. How do animals communicate in complex hydrodynamic environments? Linking hydraulics and ecology in rivers.

    NASA Astrophysics Data System (ADS)

    Johnson, Matthew; Rice, Stephen

    2015-04-01

    Animals make decisions about the suitability of habitat and their reaction to other organisms based on the sensory information that they first obtain from the environment and other organisms within that environment. Sensory information, such as sounds, scents, vibrations and visual cues, is transported, transmitted, masked and filtered by fluvial processes, such as turbulent flow. Despite the fundamental importance of this information in dictating how animals interact with the environment, only limited attention has been paid to the environmental controls on the propagation of sensory signals and cues through fluvial systems. Aquatic animals use and respond to hydraulic characteristics when navigating their environment and selecting habitat. There is evidence that some animals can also sense the presence of other organisms from the hydraulic characteristics of their wake. This implies that at least some aquatic animals can differentiate between the turbulent flow generated by the presence of living organisms and ambient turbulence generated by the environment. We investigate whether there are specific flow characteristics, distinct from the ambient environment, that potentially flag the presence of organisms to other animals. Acoustic Doppler and Particle Image Velocimetry measurements in a series of laboratory flume experiments quantified the flow around living Signal Crayfish (Pacifastacus leniusculus) and two inanimate objects of equivalent shape and size. Experiments were repeated across a gradient of turbulence intensities generated over nine combinations of flow velocity and relative submergence. Flows downstream of living crayfish were distinct from inanimate objects, with greater turbulent intensities, higher energy in low- to intermediate frequencies, and flow structures that were less coherent in comparison to those measured downstream of inanimate objects. However, the hydrodynamic signature of crayfish became masked as the intensity of ambient turbulence exceeded that generated by living crayfish. This was particularly the case at low relative submergence. These results demonstrate the importance of the fluvial environment in controlling the transmission of sensory information and suggest that the ability of organisms to sense the presence of crayfish from their hydraulic signature is likely to be limited in many situations in rivers. Thus, animals in rivers may have to rely on other senses, such as sight or hearing, especially where depth is low relative to substrate roughness and where velocities are relatively high.

  7. ANIMATION - a system for animation scene and contents creation, retrieval and display

    Microsoft Academic Search

    Peter L. Stanchev

    2002-01-01

    There is an increasing interest in the computer animation. The most of the current animation software tools are described by Richard Parent in (5). The driving ideas behind animation in general and computer animation in particular are presented in (6). More and more animations are available in various places on the Internet. The increasing availability of potentially interesting materials makes

  8. ANIMATION: a system for animation scene and contents creation, retrieval, and display

    Microsoft Academic Search

    Peter L. Stanchev

    2001-01-01

    There is an increasing interest in the computer animation. The most of the current animation software tools are described by Richard Parent in [5]. The driving ideas behind animation in general and computer animation in particular are presented in [6]. More and more animations are available in various places on the Internet. The increasing availability of potentially interesting materials makes

  9. Systems Engineering in Electronic Warfare and Battlefield Communications Systems

    Microsoft Academic Search

    George M. Elias

    2005-01-01

    Battlefield Communications have been used since ancient times, and have undergone rapid improvements in recent years. The earliest known battlefield communication techniques over long distances used messengers, smoke signals, carrier pigeons, and flags. In the last 75 years, there have been great improvements through the use of copper wire, then again in the use of wireless systems and optical fiber.

  10. Nuclear Effects on Communications Systems

    Microsoft Academic Search

    Bernard R. Tolmie

    1986-01-01

    A portable EMP surge arrestor test set can assure the EMP protection level at the pin level on hardened systems. EMP protection devices are susceptible to degradation caused by lightning and man-made EMI transients. Devices such as Zeners, MOV's, Gas Tubes and Filters are benign passive devices that protect electronic systems from EMP transients at the pin level. Degradation of

  11. Proceedings of the Military Communications System Control Symposium

    NASA Astrophysics Data System (ADS)

    Harris, S.; Heller, J.

    1980-11-01

    Contents: Perspective on Communications System Control, Navy Force Coordination and the Requirements for Communications Network Management, On the Functions of a Network Management Agency, Improved Control and Technical Management of DCS Theater Assets Under Crisis and Wartime Conditions, Survivability Performance of MX Communication System, System Control for the Tactical/Strategic Interface, Tactical Circuit-Switched Network Control, Systems Control in Tactical Digital Communications Systems - a Study in Distributed Control, the NATO III Satellite Communications Control System, Network Control in NATO Integrated Communications Systems - Stage I, Evolution of Control in the Defense Satellite Communication System, System Control Considerations for Next Generation DCS Switches, Evolving Approaches to System control in the Defense Communications Systems(DCS), and Network control and the CRM Make Possible Automated Digital Patching.

  12. SMART ANTENNAS FOR WIRELESS COMMUNICATION SYSTEMS

    Microsoft Academic Search

    Mustafa KARAKOÇ; Adnan KAVAK

    2004-01-01

    Smart antennas are considered to be promising technology for increasing the performance of wireless communication systems. A smart antenna consists of several antenna elements, whose signals are processed adaptively in order to exploit the spatial domain of the mobile radio channel (1). Usually, the signals received at the different antenna elements are multiplied with complex weights w, and then summed

  13. A Subjectively Adapted Image Communication System

    Microsoft Academic Search

    HERBERT LOHSCHELLER

    1984-01-01

    An interactive image communication system is described transmitting image information stored in a central database over low-bitrate channels. To shorten the transmission time, a data compression technique is applied in combination with a progressive image transmission procedure. Furthermore, human interaction is implemented in order to select specific areas for picture buildup or to reject additional image sharpening completely. The mean

  14. Trends in Automotive Communication Systems Nicolas Navet

    E-print Network

    Paris-Sud XI, Université de

    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

  15. High speed integrated electronics for communications systems

    Microsoft Academic Search

    JOSEPH E. BERTHOLD

    1990-01-01

    The functions necessary in broadband communications systems at speeds above 50 Mb\\/s are discussed. The types of components and functionality that are needed for access to networks and for the transmission and routing of traffic within networks are identified. Integrated circuit components used for customer-network access, network multiplexing, and switching are reviewed. It is shown that currently available digital VLSI

  16. On a reliable data communication broadcast system

    Microsoft Academic Search

    K. F. CHIANG; Y. Y. SUN; J. Y. LEE

    1988-01-01

    This paper describes the design and implementation of a 3 KHz band HF data broadcast communication system, using a quantized frequency modulation, adaptive lattice equalizer together with forward error correcting code (FEC) to obtain a high link reliability and low error rate. A frequency diversity approach is also used in the selection of the timely best carrier frequency, and a

  17. Propagation prediction models for wireless communication systems

    Microsoft Academic Search

    Magdy F. Iskander; Zhengqing Yun

    2002-01-01

    A comprehensive review of the propagation prediction models for terrestrial wireless communication systems is presented in this paper. The classic empirical models are briefly described and the focus is placed on the application of ray-tracing techniques to the development of deterministic propagation models. Schemes to increase the computational efficiency and accuracy are discussed. Traditional statistical models are also briefly reviewed

  18. Radio propagation for space communications systems

    Microsoft Academic Search

    L. J. Ippolito

    1981-01-01

    This paper presents a review of the most recent information on the effects of the earth's atmosphere on space communications systems. Models and techniques used in the prediction of atmospheric effects as influenced by frequency, geography, elevation angle, and type of transmission are discussed. Recent data on performance characteristics obtained from direct measurements on satellite links operating to above 30

  19. Europe's communications satellite system takes shape

    NASA Astrophysics Data System (ADS)

    1981-10-01

    Europe's current satellite system and impending additions are discussed, with emphasis on improvements in Europe's communications service. The first transponder for the ECS has been recently delivered from AEG-Telefunken to the French space flight center for the assembly of the AEG solar generator and integration into the satellite body. The communications satellite will be stationed at a height of 36,000 km in the spring of 1982, which should result in 24,500 new telephone connections and two new television channels for the people of Europe.

  20. Recent advances in coherent fiber communication systems

    NASA Astrophysics Data System (ADS)

    Okoshi, Takanori

    1987-01-01

    Research and development of coherent optical fiber communications have been accelerated, mainly because of the possibility of receiver sensitivity improvement reaching 20 dB, and partly because of the possibility of frequency-division multiplexing (FDM) with very fine frequency separation. In this paper, recent advances in the research on coherent optical fiber communication systems are reviewed, with emphasis on those reported in the past two years. The bit-error rate measurements so far reported are classified and investigated in four categories: PCM-ASK, PCM-FSK, PCM-PSK, and PCM-DPSK. The states-of-the-art of polarization-state stabilization techniques are also discussed.

  1. Animating an interactive conversational character for an educational game system

    Microsoft Academic Search

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

    2005-01-01

    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

  2. DECISION SUPPORT SYSTEMS IN ANIMAL PRODUCTION : A BAYESIAN FUTURE

    Microsoft Academic Search

    E. JØRGENSEN

    2001-01-01

    Within decision theory the use of Bayesian methodology is well established. However, primarily due to complexity problems the use in applied Decision Support Systems within animal production has been very limited. Recently, methodological developments have removed many of these problems, and the time seems to be ripe for wide-scale applications. Bayesian methods handles decision making under uncertainty especially in situations,

  3. Training Sessions Provide Working Knowledge of National Animal Identification System

    ERIC Educational Resources Information Center

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

    2010-01-01

    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…

  4. Animal Bites Causing Central Nervous System Injury in Children

    Microsoft Academic Search

    Paul Steinbok; Olof Flodmark; D. Walton Scheifele

    1986-01-01

    Three cases of animal bites causing central nervous system injury in children are reported. Two infants suffered compound depressed skull fractures as a result of dog bites to the head. An older child suffered direct injury to the spinal cord from a tiger bite. In 2 cases, Pasteurella meningitis occurred. Pitfalls in the management of this type of problem are

  5. College students򠰥rceptions of the national animal identification system 

    E-print Network

    Long, Jeanie Marie

    2009-05-15

    The purpose of this study was to determine awareness, knowledge, and perceptions of the National Animal Identification System (NAIS) among college students in the College of Agriculture and Life Sciences at Texas A&M University. Since the issue of a...

  6. 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...

  7. ELEC6014 (EZ412/612) Radio Communications Networks and Systems S Chen ELEC6014 Radio Communications Networks and Systems

    E-print Network

    Chen, Sheng

    , Fundamentals of Wireless Communication. Cambridge University Press, 2005. 1 #12;ELEC6014 (EZ412/612) Radio;ELEC6014 (EZ412/612) Radio Communications Networks and Systems S Chen Channel Fundamentals · IdealELEC6014 (EZ412/612) Radio Communications Networks and Systems S Chen ELEC6014 Radio Communications

  8. Land-mobile satellite communication system

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

    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.

  9. Aircraft communication via telefacsimile system

    NASA Technical Reports Server (NTRS)

    Brown, R. L., Sr.

    1972-01-01

    Based on reading rate of between 500-1000 words/minute, transmitting typewritten matter only, system uses lowest possible bandwidth to avoid overcrowding, while furnishing data as fast as it can be absorbed by pilot. Bandwidth requirements are less than 150 kHz, a considerable saving over conventional television.

  10. Enhancing Communication of Climate Impacts Assessments: Examples of Local Stories, Animations and Video.

    NASA Astrophysics Data System (ADS)

    Fitzpatrick, M. F.; Grigholm, B. O.

    2014-12-01

    Comprehensive climate impacts assessments are important vehicles for conveying salient information to the public and policy makers. However, over the last few decades communication of this important information has been hampered for a number of reasons. Firstly, we have a rapidly changing social media landscape, where there are fewer opportunities for in-depth treatment of issues. To compete in this arena, climate information needs to be packaged in sound bites, and much of the nuance and complexity may be lost. Secondly, scientific literacy among the general U.S. population is not particularly high, which creates a barrier to understanding and limits the audiences that can be reached. Thirdly, climate science has been undermined by misinformation over many years often funded by fossil fuel interests. While this latter obstacle is clearly diminishing - largely in the face of evidence from the undeniable climate impacts that are already being seen by communities - there has been much confusion generated to date. Despite the fact that 97% of active climate scientists agree that the planet is warming as a result of human greenhouse gas emission, only 42% of the U.S. population agrees (Pew Research, 2013). In the face of these challenges, much of the work that the Union of Concerned Scientists does to translate climate impacts assessments has shifted to visuals, animations, and videos that people can relate to and connect with more readily. In this session we will share some of the general design features, discuss target audiences, and outline production limitations of several local stories involving videos and animations, as well as present some recent infographics. One example of this work are case studies that focus on sea level rise and involve a local personality who can speak to climate impacts at the community level. We understand the power of visual images and stories in creating messages that stick, and we use this in designing animations that explain the technical findings of climate impacts assessments. We aim to provide the public and policy makers with accessible information to encourage responsible choices regarding both mitigation and adaptation choices to deal with climate change.All of our material is freely available for use from our website - www.ucsusa.org.

  11. Compositional Memory Systems for Multimedia Communicating Tasks

    E-print Network

    Molnos, A M; Cotofana, S D; Van Eijndhoven, J T J

    2011-01-01

    Conventional cache models are not suited for real-time parallel processing because tasks may flush each other's data out of the cache in an unpredictable manner. In this way the system is not compositional so the overall performance is difficult to predict and the integration of new tasks expensive. This paper proposes a new method that imposes compositionality to the system?s performance and makes different memory hierarchy optimizations possible for multimedia communicating tasks when running on embedded multiprocessor architectures. The method is based on a cache allocation strategy that assigns sets of the unified cache exclusively to tasks and to the communication buffers. We also analytically formulate the problem and describe a method to compute the cache partitioning ratio for optimizing the throughput and the consumed power. When applied to a multiprocessor with memory hierarchy our technique delivers also performance gain. Compared to the shared cache case, for an application consisting of two jpeg ...

  12. Security aspects of RFID communication systems

    NASA Astrophysics Data System (ADS)

    Bîndar, Valeric?; Popescu, Mircea; B?rtu?ic?, R?zvan; Craciunescu, Razvan; Halunga, Simona

    2015-02-01

    The objective of this study is to provide an overview of basic technical elements and security risks of RFID communication systems and to analyze the possible threats arising from the use of RFID systems. A number of measurements are performed on a communication system including RFID transponder and the tag reader, and it has been determined that the uplink signal level is 62 dB larger than the average value of the noise at the distance of 1m from the tag, therefore the shielding effectiveness has to exceed this threshold. Next, the card has been covered with several shielding materials and measurements were carried, under similar conditions to test the recovery of compromising signals. A very simple protection measure to prevent unauthorized reading of the data stored on the card has been proposed, and some electromagnetic shielding materials have been proposed and tested.

  13. Multiuser Wireless Communication Systems Ashutosh Sabharwal and Behnaam Aazhang

    E-print Network

    Sabharwal, Ashutosh

    Multiuser Wireless Communication Systems Ashutosh Sabharwal and Behnaam Aazhang Department of Electrical and Computer Engineering Rice University Houston TX 77005 Abstract Wireless cellular systems have high speed wireless networks. Keywords : Wireless communications, channel estimation, multiuser

  14. Integration of optimization by genetic algorithms into an L-system-based animation system

    Microsoft Academic Search

    Hansrudi Noser; Peter Stucki; Hans-Peter Walser

    2001-01-01

    In computer graphics L-systems represent a powerful rule-based language for modeling complex objects and their animation. However, designing objects and animations by rules is a difficult task because designers often cannot foresee the consequences of rules. This is especially true for non-experts in the domain. Therefore, we propose to enhance an L-system based animation system with evolutionary features based on

  15. Communications and control for electric power systems

    NASA Technical Reports Server (NTRS)

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

    1991-01-01

    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.

  16. Parallel processing spacecraft communication system

    NASA Technical Reports Server (NTRS)

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

    1998-01-01

    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.

  17. Laser communication requirements imposed by high resolution sensor systems

    Microsoft Academic Search

    J. P. Gamon; M. L. Belcher; R. L. Muse

    1988-01-01

    Long-range, wideband data-rate, satellite communication is necessary to support the command-and-control architectures evolving for a number of strategic, tactical, and remote sensing systems. Laser communications system is particularly attractive for intersatellite crosslink applications where the communications system must be incorporated into spaceborne platform designs without major operational impact. System trade-offs and technology issues involved in devising a laser communications crosslink

  18. A Shuttle based laser system for space communication

    Microsoft Academic Search

    Michael W. Fitzmaurice; Ronald C. Bruno

    1988-01-01

    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

  19. Integrated communications and optical navigation system

    NASA Astrophysics Data System (ADS)

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

    2013-12-01

    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.

  20. Advanced nurse-patient communication system.

    PubMed

    Unluturk, Mehmet S

    2012-08-01

    Effective communication is the most important part of any healthcare organization. For many years, hospital nurse call solutions had been stand-alone systems with occasional integration to pocket paging for outputting patient call alerts to mobile staff. In the late 1990's, technology enabled in-building wireless phones to supplement or replace paging systems as a means of not only sending alerts, but also enabling voice communication between mobile staff and patients. Today's nurse call market requires integration of additional information from location and ADT (admit, discharge, transfer) systems into what have traditionally been nurse call applications. This system information is required not only at the nursing station, pagers, and phones, but also at PC's placed on each patient care floor in hallways, nurse stations, and offices, and at areas away from the patients, including administrator and clinical engineering offices. It is crucial that nurses have the latest patient information in their hand wherever they go in the hospital. In this paper, MatchMaker.NET has been developed to integrate all these technologies into the hospital's LAN to improve nurse-patient communication. PMID:21541690

  1. System Test Pattern Language Copyright 1996 AG Communication Systems Corporation

    E-print Network

    Schmidt, Douglas C.

    System Test Pattern Language Copyright Ó 1996 AG Communication Systems Corporation Permission, the role of a System Tester has become vital in the lifecycle of product development. This pattern language modify it, but it is this common context that helps focus these patterns into a pattern language

  2. Power Allocation Based on System Capacity under Cooperative Communication Systems

    Microsoft Academic Search

    Wenkai Liu; Congcong Lao; Menglong Wu

    2011-01-01

    Different effects of power allocation between the source node and all the relay nodes on the system capacity are taken into consideration in an amplify-and-forward cooperative communication system. An optimum power allocation algorithm based on harmonic mean of relay channel strength to increase the system capacity was proposed. Furthermore, exact formulations of s p , r p and i p

  3. Personalized Unit Selection for an Image-based Facial Animation System

    E-print Network

    Personalized Unit Selection for an Image-based Facial Animation System Axel Weissenfeld, Kang Liu-realistic facial animation can be generated. Index Terms-- Facial Animation, Unit Selection, Image-based Rendering without [1] [2]. Nowadays animation techniques range from animating 3D models to image-based rendering

  4. Multi-access laser communications transceiver system

    NASA Technical Reports Server (NTRS)

    Ross, Monte (Inventor); Lokerson, Donald C. (Inventor); Fitzmaurice, Michael W. (Inventor); Meyer, Daniel D. (Inventor)

    1993-01-01

    A satellite system for optical communications such as a multi-access laser transceiver system. Up to six low Earth orbiting satellites send satellite data to a geosynchronous satellite. The data is relayed to a ground station at the Earth's surface. The earth pointing geosynchronous satellite terminal has no gimbal but has a separate tracking mechanism for tracking each low Earth orbiting satellite. The tracking mechanism has a ring assembly rotatable about an axis coaxial with the axis of the field of view of the geosynchronous satellite and a pivotable arm mounted for pivotal movement on the ring assembly. An optical pickup mechanism at the end of each arm is positioned for optical communication with one of the orbiting satellites by rotation of the ring.

  5. Building intelligent communication systems for handicapped aphasiacs.

    PubMed

    Fu, Yu-Fen; Ho, Cheng-Seen

    2010-01-01

    This paper presents an intelligent system allowing handicapped aphasiacs to perform basic communication tasks. It has the following three key features: (1) A 6-sensor data glove measures the finger gestures of a patient in terms of the bending degrees of his fingers. (2) A finger language recognition subsystem recognizes language components from the finger gestures. It employs multiple regression analysis to automatically extract proper finger features so that the recognition model can be fast and correctly constructed by a radial basis function neural network. (3) A coordinate-indexed virtual keyboard allows the users to directly access the letters on the keyboard at a practical speed. The system serves as a viable tool for natural and affordable communication for handicapped aphasiacs through continuous finger language input. PMID:22315546

  6. Grey systems theory applications to wireless communications

    Microsoft Academic Search

    Ashwin AmannaMatthew; Matthew J. Price; Ratchaneekorn Thamvichai

    This paper discusses grey systems theory (GST) applications in wireless communications and highlights its potential to cognitive\\u000a radio. GST consists of information theory concepts and practical algorithms developed to address situations where information\\u000a is incomplete and affected by random uncertainties. Two GST concepts, grey relational analysis (GRA) and grey model (GM) prediction\\u000a theory are discussed. GRA provides a method to

  7. Specifying communicative multi-agent systems

    Microsoft Academic Search

    Steven Shapiro; Yves Lespérance; Hector J. Levesque

    In this paper, we describe a framework for specifying communicative multi-agent systems, using a theory of action based on\\u000a the situation calculus to describe the effects of actions on the world and on the mental states of agents; and the concurrent,\\u000a logic programming language ConGolog to specify the actions performed by each agent. Since ConGolog has a well-defined semantics,\\u000a the

  8. Issues in satellite personal communication systems

    Microsoft Academic Search

    Erich Lutz

    1998-01-01

    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

  9. SLCSAT (Submarine Laser Communication Satellite) communication system design study

    Microsoft Academic Search

    S. L. Bernstein; R. S. Bondurant; E. A. Bucher; V. W. Chan; F. G. Walther

    1989-01-01

    This report summarizes the results of a Lincoln Laboratory study of issues affecting Submarine Laser Communication Satellite (SLCSAT) implementation. The study compares alternative SLCSAT downlink implementations using semiconductor and solid-state lasers in terms of the satellite transmitter power required to provide a given level of communication service. Signal coding is applied to increase transmitter design flexibility by accommodating a wider

  10. Satellite communications systems move into the twenty-first century

    Microsoft Academic Search

    Leonard S. Golding

    1998-01-01

    This paper discusses the evolution of communication satellite systems and communications satellite technology from the 1960's\\u000a to the 1990's. The paper identifies the key attributes of satellite communications that has driven this evolution and now\\u000a drives the future directions such systems will take. The paper then discusses the future direction of communication satellite\\u000a systems including DBS, MSS, FSS and hybrid

  11. A Smart Communication System for Avatar Agents in Virtual Environment

    Microsoft Academic Search

    Soo-Hyun Park; Seung-Hyun Ji; Dong-Sung Ryu; Hwan-Gue Cho

    2008-01-01

    This paper propose a virtual communication system for avatar agents using geometry topology. Current virtual communication systems have several problems and limitations since they use only 2-dimensional dialog box and word balloons though they provide 3-dimensional virtual environment to communicate in virtual space. To solve these problems, modern virtual communication systems have developed artificial chatting techniques such as 'One-to-One Chatting'

  12. Bioluminescent system for dynamic imaging of cell and animal behavior

    SciTech Connect

    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

    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.

  13. Satellite communications systems and technology. Executive Summary

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

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

  14. A Data-driven 3D Animation System for Tele-Rehabilitation

    E-print Network

    Hu, Huosheng

    A Data-driven 3D Animation System for Tele-Rehabilitation Shumei Zhang1) , Huosheng Hu2-driven 3D animation system is developed for stroke patients to use remotely at home environments to recover analysis diagram, data-driven arm animation, and text-driven speech animation. It also contains an expert

  15. A new frequency synthesizer for coherent communication in frequency hopping spread spectrum multiple access communication systems

    Microsoft Academic Search

    Hisayoshi Sugiyama; Yoshifumi Amemiya

    1983-01-01

    In Spread Spectrum Multiple Access (SSMA) communications systems, the narrow band information spectrum is uniformly spread over the communication bandwidth, and plural communication parties share the same frequency band at the same time. Frequency-Hopping SSMA (FH-SSMA) involves the generation of pseudonoise signals, for spectrum spreading of the information signal, by means of a frequency synthesizer. Conventional frequency synthesizers, howewver, cannot

  16. On requirements specifications for a power system communications system

    Microsoft Academic Search

    Göran N. Ericsson

    2005-01-01

    This paper elucidates and discusses some aspects of requirements specifications of a power system communication system. The results are based on applied research and procurement work in both academia and industry. Requirements regarding functionality, availability, and classification are treated mainly from a customer's viewpoint. Specification of unavailability instead of availability is proposed. Two concepts of classification and ranking of requirements

  17. An Architecture for Real-Time Multimedia Communication Systems

    Microsoft Academic Search

    Cosmos Nicolaou

    1990-01-01

    A multimedia communication system includes both the communication protocols used to transport the real-time data and the distributed computing system (DCS) within which any applications using the protocols must execute. The architecture presented attempts to integrate these communications protocols with the DCS in a smooth fashion in order to ease the writing of multimedia applications. Two issues are identified as

  18. Joint Optimization of Communication Rates and Linear Systems

    E-print Network

    limitations.We focus on finding the allocation of communication resources such as transmission powers. In the first, we assume that the linear system is fixed and address the problem of allocating communicationJoint Optimization of Communication Rates and Linear Systems Lin Xiao1 Mikael Johansson2 Haitham

  19. Active Sensing by Unmanned Aircraft Systems in Realistic Communication

    E-print Network

    Frew, Eric W.

    Active Sensing by Unmanned Aircraft Systems in Realistic Communication Environments Eric W. Frew-theoretic framework for active sensing by unmanned aircraft systems in realistic communication environments. The position dependency of wireless networked communication is modeled using the standard empirical radio model

  20. Optical communication system expands CORK seafloor observatory's bandwidth

    Microsoft Academic Search

    N. Farr; J. Ware; C. Pontbriand; T. Hammar; M. Tivey

    2010-01-01

    An important aspect of deploying scientific sensors in the deep sea is reliable underwater communication. We have developed an optical communication system that complements and integrates with an acoustic system to provide underwater communications that is capable of high data-rates and low latency in clear water combined with long range and robustness in the presence of high turbidity. This combined

  1. An open animation tool: application to telecommunication systems

    Microsoft Academic Search

    Pierre Combes; Fabrice Dubois; Béatrice Renard

    2002-01-01

    This paper presents an animation environment based on an open and flexible architecture. Its flexible architecture allows animating different animation sources (formal and executable language like SDL or scenario languages like MSC or UML sequence diagrams). The animation multimedia user interface allows integrating different multimedia objects and different types of representations.This animation environment has been intensively used for telecommunication applications

  2. ELEC3028 Digital Transmission MODEM S Chen Digital Communication System

    E-print Network

    Chen, Sheng

    ELEC3028 Digital Transmission ­ MODEM S Chen Digital Communication System · Purpose: communicate: rate, quality spectral bandwidth requirement · Major components: CODEC, MODEM and channel modulation input output CODEC MODEM Medium 1 #12;ELEC3028 Digital Transmission ­ MODEM S Chen Digital

  3. 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 ...

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

    NASA Technical Reports Server (NTRS)

    Johannes, J. D.

    1974-01-01

    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.

  5. FM-SCPC system and equipments for satellite communication

    Microsoft Academic Search

    S. Isobe; T. Saruwatari; M. Iguchi; H. Ohashi; S. Tsuchiya; I. Nishiyama; T. Takahashi

    1982-01-01

    It is planned that one of the K-band transponders of a Japanese communications satellite will be used for small traffic communications. In order to establish the small capacity communications system, the Signal Channel per Carrier (SCPC) system operating in 30\\/20 GHz band is being considered as part of the Medium Capacity Communications Satellite for Experimental Purposes (CS), and small-size earth

  6. Implementation and assessment of an animal management system for small-animal micro-CT \\/ micro-SPECT imaging

    Microsoft Academic Search

    David W. Holdsworth; Sarah A. Detombe; Chris Chiodo; Stanley T. Fricke; Maria Drangova

    2011-01-01

    Advances in laboratory imaging systems for CT, SPECT, MRI, and PET facilitate routine micro-imaging during pre-clinical investigations. Challenges still arise when dealing with immune-compromised animals, biohazardous agents, and multi-modality imaging. These challenges can be overcome with an appropriate animal management system (AMS), with the capability for supporting and monitoring a rat or mouse during micro-imaging. We report the implementation and

  7. Development of the optical biopsy system for small experimental animals

    NASA Astrophysics Data System (ADS)

    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

    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.

  8. A dual micro-CT system for small animal imaging

    PubMed Central

    Badea, C.T.; Johnston, S.; Johnson, B.; Lin, M.; Hedlund, L.W.; Johnson, G. Allan

    2011-01-01

    Micro-CT is a non-invasive imaging modality usually used to assess morphology in small animals. In our previous work, we have demonstrated that functional micro-CT imaging is also possible. This paper describes a dual micro-CT system with two fixed x-ray/detectors developed to address such challenging tasks as cardiac or perfusion studies in small animals. A two-tube/detector system ensures simultaneous acquisition of two projections, thus reducing scanning time and the number of contrast injections in perfusion studies by a factor of two. The system is integrated with software developed in-house for cardio-respiratory monitoring and gating. The sampling geometry was optimized for 88 microns in such a way that the geometric blur of the focal spot matches the Nyquist sample at the detector. A geometric calibration procedure allows one to combine projection data from the two chains into a single reconstructed volume. Image quality was measured in terms of spatial resolution, uniformity, noise, and linearity. The modulation transfer function (MTF) at 10% is 3.4 lp/mm for single detector reconstructions and 2.3 lp/mm for dual tube/detector reconstructions. We attribute this loss in spatial resolution to the compounding of slight errors in the separate single chain calibrations. The dual micro-CT system is currently used in studies for morphological and functional imaging of both rats and mice. PMID:22049304

  9. 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.

  10. GAS MAIN SENSOR AND COMMUNICATIONS NETWORK SYSTEM

    SciTech Connect

    Hagen Schempf, Ph.D.

    2003-02-27

    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.

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

    NASA Technical Reports Server (NTRS)

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

    1995-01-01

    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.

  12. The principle of the positioning system based on communication satellites

    Microsoft Academic Search

    Guoxiang Ai; Huli Shi; Haitao Wu; Zhigang Li; Ji Guo

    2009-01-01

    It is a long dream to realize the communication and navigation functionality in a satellite system in the world. This paper\\u000a introduces how to establish the system, a positioning system based on communication satellites called Chinese Area Positioning\\u000a System (CAPS). Instead of the typical navigation satellites, the communication satellites are configured firstly to transfer\\u000a navigation signals from ground stations, and

  13. Additional Communication System Services for Safety Critical Applications

    Microsoft Academic Search

    Colin Ryan; Donal Heffernan; Gabriel Leen

    2005-01-01

    Current and emerging safety-critical applications such as the automotive X-by-wire systems require a high degree of reliability. These dependable embedded distributed systems require an ultra-reliable communication system to communicate data between the distributed components. In addition to guaranteeing a high level of reliability these communication systems should facilitate the development of fault-tolerant applications. This paper briefly reviews the key emerging

  14. GAS MAIN SENSOR AND COMMUNICATIONS NETWORK SYSTEM

    SciTech Connect

    Hagen Schempf

    2004-09-30

    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.

  15. Panoramic alignment system for optical wireless communication systems

    NASA Astrophysics Data System (ADS)

    Shen, Thomas C.; Drost, Robert J.; Rzasa, John; Sadler, Brian M.; Davis, Christopher C.

    2015-03-01

    Free space optical communication may provide a viable adjunct to radio frequency (RF) technology for mobile communications, especially in "RF-denied" settings in which RF-based communication may be prohibited or impractical. These settings may include military tactical environments or settings which suffer from RF jamming or interference. Unlike many RF communication systems, point-to-point optical communications between mobile nodes typically require establishing and maintaining alignment, which requires each node to have awareness of the locations of neighboring nodes. We propose a method to create this situational awareness between nodes using purely optical means. This method uses a camera that is focused on a hyperboloidal mirror, thus providing a 360-degree view of the surrounding environment. The camera and mirror are used to detect light emitted from the beacon transmitters from neighboring nodes, with the location of the beacon image in the sensor plane of the camera yielding elevation and azimuth information of the beacon. The beacon transmitter itself is modulated, allowing it to be distinguished from the environment. In discussing our experimental realization of this system, we assess its performance.

  16. Integrated source and channel encoded digital communication system design study

    Microsoft Academic Search

    G. K. Huth; S. Udalov

    1974-01-01

    This study investigated the configuration and integration of a wideband communication system with a Ku-band rendezvous radar system. The goal of the study was to provide as much commonality between the two systems as possible. The antenna design was described with the only change being the requirement for dual polarization (linear for the radar system and circular for the communication

  17. Design of an embedded multi-function communications control system

    Microsoft Academic Search

    Min Liu; Jin Tan

    2010-01-01

    An embedded multi-function communications control system is designed for data acquisition and processing in this paper. It consists of two parts by hardware and software. The main applications of the system are monitoring the environment of base station for mobile communications and telecommunications terminal board room. This system can deal the data acquisition and processing for Entrance guard system, Fire

  18. A digital transmission system for global maritime satellite communications

    Microsoft Academic Search

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

    1984-01-01

    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.

  19. Solar heating of integrated greenhouse-animal shelter systems

    SciTech Connect

    Ben-Abdallah, N.

    1983-01-01

    An analytical procedure to determine the effectiveness of greenhouses as solar collectors was presented. This procedure was used to predict the effect of several construction parameters on solar radiation input to greenhouses. The orientation of the greenhouse was found to be the most effective construction parameter controlling solar radiation input to greenhouses. The effective albedo of the plant canopy was also found to be a significant factor. A new solar greenhouse design, suitable for high latitude regions was developed. The results showed that an internal solar collector could be incorporated as an integral part of the greenhouse design. The concept developed could be used as a free-standing greenhouse or in a combination with livestock building. The efficiency of the solar input was investigated for the conventional and the shed greenhouses, both as a free-standing unit and a greenhouse-animal shelter system, using computer simulation analyses. The results indicated that the efficiency of solar input is highly dependent on location; the effect of location on the shed type design is more profound. A typical case of a greenhouse-hog barn production system was investigated using computer simulation analyses. The results showed that such a food production system achieves a significant reduction in conventional fuel consumption due to both animal waste heat recovery and solar energy utilization.

  20. An Ethanol Vapor Chamber System for Small Animals

    PubMed Central

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

    2012-01-01

    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

  1. Towards the computerized animal house: the Newcastle University Animal House Management System

    Microsoft Academic Search

    R. Wootton; P. A. Flecknell

    1986-01-01

    Summary A suite of computer programs (available from the Laboratory Animal Science Association) has been written to carry out much of the routine administra· tion of a central animal house facility. Principal functions include stock control and accounting. The programs are fully portable and can be implemented on almost any microcomputer. They are protected against data-entry errors and can be

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

    PubMed

    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

    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

  3. Application of the Iridium Satellite System to Aeronautical Communications

    NASA Technical Reports Server (NTRS)

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

    2008-01-01

    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.

  4. A General Systems Approach to Transnational Environmental Communication (TEC) Networks.

    ERIC Educational Resources Information Center

    Horn, B. Ray

    Human societies are beginning to direct many of their communication activities toward developing and maintaining a healthy global system. This paper focuses on two areas: (1) communication and eco-development problems, and (2) a worldwide assessment of environmental communication and education resource needs. Current research to develop and…

  5. Application of WSN in Mine Emergency Communication System

    Microsoft Academic Search

    Junxuan Wang; Yanyan Zhang; Guangyue Lu

    2008-01-01

    A scheme based on wireless sensor networks (WSN) which combined with mobile communications technology using in mines emergence communications was researched. Any safety parameters of coal mines - such as gas concentration and co concentration - were obtained by WSN systems in emergency or coal disaster, and then data were collected and transmitted to data processing center with mobile communication

  6. A Hybrid Radio Frequency and Broadcast Visible Light Communication System

    E-print Network

    A Hybrid Radio Frequency and Broadcast Visible Light Communication System Michael B. Rahaim , Anna and applications. Deployed networks using Radio Frequency (RF) communications are characterized by a shared medium, limited available spectrum and limited ability to scale with increasing demand. Directional communications

  7. Message Broadcast using Optical Orthogonal Codes in Vehicular Communication Systems

    E-print Network

    Valaee, Shahrokh

    1 Message Broadcast using Optical Orthogonal Codes in Vehicular Communication Systems Farzad-mail:{frd,behnam,valaee}@comm.utoronto.ca Abstract--Broadcast communication is considered to be es- pecially important in delivering safety messages on repetition. The proposed method uses optical orthogonal codes in vehicular broadcast communications

  8. Establishing conventional communication systems: Is common knowledge necessary?

    Microsoft Academic Search

    Dale J. Barr

    2004-01-01

    How do communities establish shared communication systems? The Common Knowledge view assumes that symbolic conventions develop through the accumulation of common knowledge regarding communication practices among the members of a community. In contrast with this view, it is proposed that coordinated communication emerges a by-product of local interactions among dyads. A set of multi-agent computer simulations show that a population

  9. Establishing Conventional Communication Systems: Is Common Knowledge Necessary?

    ERIC Educational Resources Information Center

    Barr, Dale J.

    2004-01-01

    How do communities establish shared communication systems? The Common Knowledge view assumes that symbolic conventions develop through the accumulation of common knowledge regarding communication practices among the members of a community. In contrast with this view, it is proposed that coordinated communication emerges a by-product of local…

  10. Affective Dialogue Communication System with Emotional Memories for Humanoid Robots

    Microsoft Academic Search

    M. S. Ryoo; Yong-ho Seo; Hye-won Jung; Hyun S. Yang

    2005-01-01

    Memories are vital in human interactions. To interact sociably with a human, a robot should not only recognize and express emotions like a human, but also share emotional experience with humans. We present an affective hu- man-robot communication system for a humanoid robot, AMI, which we de- signed to enable high-level communication with a human through dialogue. AMI communicates with

  11. Biological pathways as communicating computer systems.

    PubMed

    Kwiatkowska, Marta Z; Heath, John K

    2009-08-15

    Time and cost are the enemies of cell biology. The number of experiments required to rigorously dissect and comprehend a pathway of even modest complexity is daunting. Methods are needed to formulate biological pathways in a machine-analysable fashion, which would automate the process of considering all possible experiments in a complex pathway and identify those that command attention. In this Essay, we describe a method that is based on the exploitation of computational tools that were originally developed to analyse reactive communicating computer systems such as mobile phones and web browsers. In this approach, the biological process is articulated as an executable computer program that can be interrogated using methods that were developed to analyse complex software systems. Using case studies of the FGF, MAPK and Delta/Notch pathways, we show that the application of this technology can yield interesting insights into the behaviour of signalling pathways, which have subsequently been corroborated by experimental data. PMID:19657015

  12. SAW based systems for mobile communications satellites

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

    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.

  13. Dimensioning of communication links for base-station and MSC interconnection in CDMA mobile communication systems

    Microsoft Academic Search

    Khaled M. F. Elsayed

    1997-01-01

    In CDMA mobile communication systems, voice is encoded and packaged in variable length packets that are transported between the mobile station and the switching center. While the packetization provides great flexibility in resource allocation, it poses a QOS challenge on voice. We discuss link dimensioning for a typical CDMA system. We consider a communication link connecting a CDMA base-station and

  14. Animating TLA Specifications

    Microsoft Academic Search

    Yassine Mokhtari; Stephan Merz

    1999-01-01

    TLA (the Temporal Logic of Actions) is a linear temporal logic for specifying and reasoning about reactive systems. We define a subset of TLA whose formulas are amenable to validation by animation, with the intent to fa- cilitate the communication between domain and solution experts in the design of reactive systems. The Temporal Logic of Actions (TLA) has been proposed

  15. National airspace system air-ground communications operational concept

    NASA Astrophysics Data System (ADS)

    Trent, William; Kuhn, Rodney; Pickerell, Thomas

    1990-02-01

    A requirement for the National Airspace System (NAS) is to provide for air-ground communications, as identified in the NAS System Requirement Specification, NAS-SR-1000. A concept of operations for air-ground communications is presented. Air-ground communications capabilities are described and the relationships are shown between subsystems, facilities, information, and operators/users. A common perspective is provided for personnel involved in air-ground communication activities. Assistance is provided for determining whether air-ground communications meet formal requirements and also for coordinating the organizations involved.

  16. 46 CFR 31.35-5 - Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... false Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.-TB/ALL. 31...35-5 Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.—TB/ALL....

  17. 46 CFR 31.35-5 - Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... false Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.-TB/ALL. 31...35-5 Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.—TB/ALL....

  18. 46 CFR 31.35-5 - Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... false Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.-TB/ALL. 31...35-5 Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.—TB/ALL....

  19. 46 CFR 31.35-5 - Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... false Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.-TB/ALL. 31...35-5 Communications; alarm systems, telephone and voice tube systems, engine telegraph systems, etc.—TB/ALL....

  20. A single-frequency duplex\\/multiplex security communication system

    Microsoft Academic Search

    Po-Lain Chang; Yuan-Hsi Hsu; Hong-Kuang Hwang

    1991-01-01

    A full duplex\\/multiplex security communication system with single radio carrier frequency is described. Totally different from traditional simplex or double-frequency-full-duplex radio techniques, this novel communication system utilizes time compression and expansion techniques and uses the idea of time slot allocation for multiplexing. By this scheme, full-duplex\\/multiplex communication system can be established on a single carrier frequency. With conventional radio techniques,

  1. 21 CFR 890.3710 - Powered communication system.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...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....

  2. 21 CFR 890.3700 - Nonpowered communication system.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...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....

  3. 21 CFR 890.3710 - Powered communication system.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...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)...

  4. 21 CFR 890.3700 - Nonpowered communication system.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...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)...

  5. 21 CFR 890.3710 - Powered communication system.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...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)...

  6. 21 CFR 890.3710 - Powered communication system.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...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)...

  7. 21 CFR 890.3700 - Nonpowered communication system.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...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)...

  8. 21 CFR 890.3700 - Nonpowered communication system.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...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)...

  9. A platform for ultra wideband communication systems

    E-print Network

    Ackerman, Nathan (Nathan Joseph)

    2005-01-01

    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 ...

  10. Tone-activated, remote, alert communication system

    NASA Technical Reports Server (NTRS)

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

    1971-01-01

    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.

  11. Capacity performance of an inductively coupled near field communication system

    Microsoft Academic Search

    H. C. Jing; Y. E. Wang

    2008-01-01

    The capacity performance of the inductively coupled near field communication system in free space is analyzed based on the equivalent circuit model of the system and the information theory. The analytical results provide good guidelines about the estimation of the capacity performance and the antenna design for an inductively coupled near field communication system.

  12. EHF space systems: Experimental missions for broadband communications

    Microsoft Academic Search

    Marina Ruggieri; E rnestina Cianca; Tommaso Rossi; Marco Lucente; Cosimo Stallo; Giuseppe Codispoti; Lamberto Zuliani

    2009-01-01

    In the last years scientific community has been witness of the growing interest in global EHF satellite systems for broadband communications; these systems can help national and regional telecommunications service operators to provide broadband communications in areas not adequately served by terrestrial systems. In this paper main EHF satellite missions are presented, outlining challenges and future perspectives.

  13. Developments in the use of wavelets in communication systems

    Microsoft Academic Search

    Heather M. Newlin

    1998-01-01

    Research into the use of wavelets in communication systems has become an `established' field within the last five years. Decent progress has been made in a short period of time, including finding wavelet applications, whose performance match current systems, in nearly every part of the typical communication system. This paper provides an overview of these developments by presenting wavelet implementations

  14. Desiderata for Personal Electronic Communication in Clinical Systems

    Microsoft Academic Search

    Indra Neil Sarkar; Justin Starren

    2002-01-01

    Electronic communication among clinicians and patients is becoming an essential part of medical practice. Evaluation and selection of these electronic systems, called personal clinical electronic communication (PCEC) systems, can be a difficult task in institutions that have no prior experience with such systems. It is particularly difficult in the clinical context. To directly address this point, the authors consulted a

  15. COSMO: a communication scheme for cooperative knowledge-based systems

    Microsoft Academic Search

    Stephen T. C. Wong

    1993-01-01

    The purpose of this paper is to present the design principles and features of a communication scheme that has been used to support cooperative problem solving within a network of knowledge-based systems. In presenting this account, we attempt to answer a set of critical yet unsettled questions of cooperative systems communication, such as when and how a knowledge-based system knows

  16. A Communication-Centric Embedded System Architecture (ACCESA)

    Microsoft Academic Search

    Radha Guha

    2009-01-01

    In the era of application convergence, the embedded systems are required to support multiple applications with different traffic patterns and quality of service (QoS) requirements. But continual process technology's shrinking trend makes the communication network of the embedded system the performance bottleneck for its increased latency. To ameliorate this problem, a communication-centric embedded system architecture (ACCESA) is proposed in this

  17. Carrier Planning Issues for TDMA Personal Communication System

    Microsoft Academic Search

    Jyh-Horng Wen; Jenn-Kaie Lain

    2001-01-01

    Radio spectrum is the most valuable resource for wireless communication, thus high spectrum utilization is mostly desired to increase system economy. With an efficient frequency allocation method and an effective handoff procedure, a personal communication system can be operated with minimal number of carriers while maintaining an acceptable level of system performance, and thereby leading to a better spectrum utilization.

  18. Energy-quality system design for in-body communication

    Microsoft Academic Search

    Yuwei Zhang; Ye Li; Dengyu Qiao; Yuanting Zhang

    2009-01-01

    With the explosive development of wireless communication technology, more and more implanted medical devices appear in everyday life. Because of the limited energy resource in implanted devices, the energy-quality wireless system design is the biggest challenge. In this paper, we update our former system level energy model and make it suitable for implantable medical communication system. In the new model,

  19. The Picture Exchange Communication System: Digital Photographs versus Picture Symbols

    ERIC Educational Resources Information Center

    Jonaitis, Carmen

    2011-01-01

    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…

  20. Digital Autonomous Terminal Access Communication (DATAC) system

    NASA Technical Reports Server (NTRS)

    Novacki, Stanley M., III

    1987-01-01

    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.

  1. 77 FR 28797 - Redundancy of Communications Systems: Backup Power Private Land Mobile Radio Services: Selection...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-05-16

    ...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:...

  2. THE DEVELOPMENT OF A GENERAL AUXILIARY DIAGNOSIS SYSTEM FOR COMMON DISEASE OF ANIMAL

    Microsoft Academic Search

    Jianhua Xiao; Hongbin Wang; Ru Zhang; Peixian Luan; Lin Li; Danning Xu

    2009-01-01

    \\u000a In order to development one expert system for animal disease in china, and this expert system can help veterinary surgeon\\u000a diagnose all kinds of disease of animal. The design of an intelligent medical system for diagnosis of animal diseases is presented\\u000a in this paper. The system comprises three major parts: a disease case management system (DCMS), a Knowledge management system

  3. On delay-sensitive communication over wireless systems

    E-print Network

    Liu, Lingjia

    2009-05-15

    -antenna systems. Based on the proposed framework, we find that delay constraints significantly influence how system resources should be allocated. Channel correlation has a major impact on the performance of wireless communication systems. Sophisticated power...

  4. Method and apparatus for animal positioning in imaging systems

    DOEpatents

    Hadjioannou, Arion-Xenofon; Stout, David B.; Silverman, Robert W.

    2013-01-01

    An apparatus for imaging an animal includes a first mounting surface, a bed sized to support the animal and releasably secured to or integral with the first mounting surface. The apparatus also includes a plurality of straps, each having a first end in a fixed position relative to the bed and a second end for tightening around a limb of the animal. A method for in-vivo imaging of an animal includes providing an animal that has limbs, providing a first mounting surface, and providing a bed removably secured to or integral with the mounting surface and sized to support the animal as well as being coupled to a plurality of straps. The method also includes placing the animal on the bed between the plurality of straps and tightening at least two of the plurality of straps around at least two of the limbs such that the animal is substantially secured in place relative to the bed.

  5. Method and system for pipeline communication

    SciTech Connect

    Richardson; John G. (Idaho Falls, ID)

    2008-01-29

    A pipeline communication system and method includes a pipeline having a surface extending along at least a portion of the length of the pipeline. A conductive bus is formed to and extends along a portion of the surface of the pipeline. The conductive bus includes a first conductive trace and a second conductive trace with the first and second conductive traces being adapted to conformally couple with a pipeline at the surface extending along at least a portion of the length of the pipeline. A transmitter for sending information along the conductive bus on the pipeline is coupled thereto and a receiver for receiving the information from the conductive bus on the pipeline is also couple to the conductive bus.

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

    E-print Network

    Thorup, Kasper

    biologists may find a global small-animal tracking system helpful in testing, validating and expanding181 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

  7. NPOESS McMurdo Multimission Communications System

    NASA Astrophysics Data System (ADS)

    Paciaroni, J.; Higgins, C.; Jamilkowski, M. L.

    2010-12-01

    The National Oceanic & Atmospheric Administration (NOAA), Dept. of Defense (DoD), and National Aeronautics & Space Administration (NASA) are jointly acquiring the next-generation weather/environmental satellite system - the National Polar-orbiting Operational Environmental Satellite System (NPOESS). NPOESS replaces the current NOAA Polar-orbiting Operational Environmental Satellites (POES) and DoD Defense Meteorological Satellite Program (DMSP). NPOESS sensors will collect meteorological, oceanographic, climatological and solar-geophysical data of the earth, atmosphere and space. Northrop Grumman Aerospace Systems (NGAS), NPOESS’ prime contractor, provides the Space Segment (SS). The NPOESS command & data distribution part known as the Command, Control & Communications Segment (C3S), developed by Raytheon Intelligence & Information Systems, manages the overall mission from control & status of the space & ground assets to ensuring delivery of timely, high-quality data from the SS to the Interface Data Processing Segment (IDPS). A C3S data-delivery system key feature is SafetyNetTM (a NGAS trademark), 15 globally-distributed ground receptors developed by Raytheon. These antennae will collect up to 5X as much environmental data about 4X faster than current polar-orbiting weather satellites. These data will then be forwarded nearly at once to US weather centrals via the global fiber optic network for processing & production of data records for use in environmental prediction models. McMurdo Antarctica is a significant SafetyNetTM antenna site due to its high-latitude location. C3S, working with the National Science Foundation to upgrade & expand the existing off-continent satellite communications (SATCOM) link at McMurdo, will provide 60 Mbps of bandwidth outbound from McMurdo and 20 Mbps inbound to those missions. The 1st major upgrade milestone (2008) increased the bandwidth from 3 Mbps to/from Antarctica to 10 Mbps. Additionally, Raytheon’s C3S is upgrading the network infrastructure at both McMurdo and the Belrose Earth Station, Australia SATCOM site to provide routing support for several missions, as well as expansion capabilities to support future missions at McMurdo. The upgrade completes in early 2011 to support new downlink capabilities called the ‘McMurdo Multimission Communications System.’ The big increase of available bandwidth to/from McMurdo allows more polar-orbiting environmental/weather satellite missions to use McMurdo as a 2nd downlink site. Two added missions, European Organisation for the Exploitation of Meteorological Satellites’ (EUMETSAT) MetOp polar system and the NOAA-operated DMSP, will downlink mission data to McMurdo. The NASA McMurdo Ground Station antenna will support the EUMETSAT mission. The NPOESS receptor at McMurdo will be a special dual-band antenna receiving both a NPOESS Ka-Band downlink and DMSP S-Band downlink. These upgrades will support routing data from Antarctica and distribution to each mission’s processing facility via the NPOESS Wide Area Network. The resulting acceleration across the SATCOM link allows each mission’s bandwidth use to vary based on the link usage and requirements. This flexibility ultimately allows the SATCOM link to handle more missions compared to static bandwidth allocations to each individual mission.

  8. Design and Simulation for a Reformative Transform Domain Communication System

    Microsoft Academic Search

    Xiong Jin-shi; Ren Qing-hua; Li Zheng-gang; Liu Yun-jiang

    2009-01-01

    With the excellent ability of anti-jamming, the traditional transform domain communication system (TDCS) is limited in wide application due to the same electromagnetic environment between the transmitter and the receiver. Based on the traditional TDCS, a long-distance aviation transform domain communication system (LDA-TDCS) is presented to realize the aviation communication under complex electromagnetic environment. The scheme and function model of

  9. RF data communications considerations in advanced driver information systems

    Microsoft Academic Search

    Allan M. Kirson

    1991-01-01

    Advanced Driver Information Systems (ADIS)P, a subset of Intelligent Vehicle Highway Systems (IVHS), are considered. Some of the communications technologies that may be considered for IVHS\\/ADIS implementation are described, with an emphasis on wide-area RF data communications. The discussion covers communications between the infrastructure and the vehicle fleet, and not the connections between the roadside equipment and the traffic management

  10. THE ALOHA SYSTEM: another alternative for computer communications

    Microsoft Academic Search

    Norman Abramson

    1970-01-01

    In September 1968 the University of Hawaii began work on a research program to investigate the use of radio communications for computer-computer and console-computer links. In this report we describe a remote-access computer system---THE ALOHA SYSTEM---under development as part of that research program and discuss some advantages of radio communications over conventional wire communications for interactive users of a large

  11. Increasing the Social Communication of a Boy With Autism Using Animal-assisted Play Therapy: A Case Report.

    PubMed

    Fung, Suk Chun

    2015-01-01

    Context • Although research has shown that animal-assisted play therapy (AAPT) is associated with increased positive social behaviors in children with autism, the related literature on AAPT and autism is very limited. Objectives • The study tested the effectiveness of AAPT in increasing the social communication of a boy with autism. The treatment's effects on specific types of social communication were also investigated. Design • An A-B-A single-subject design was adopted to examine treatment effectiveness. Follow-up assessments were made at 1 mo posttreatment. Setting • The videotaped treatment sessions were held in the multipurpose room of the participant's school. Participant • A 7-y-old boy who had a diagnosis of autism and mild-grade intellectual disability participated in the study. Intervention • AAPT was implemented in 20-min sessions held 3 ×/wk. The 14 AAPT sessions occurred in 4 phases, covering child-dog relationship building and interaction in the presence of the therapist, with the diminishing presence of the dog occurring in phase 4.Outcome Measures • Naturally occurring social behaviors were measured in 3 baseline sessions, during the 14 AAPT sessions, during 3 posttreatment sessions, and again during 3 follow-up sessions. Momentary time sampling was used to estimate the frequency of target behaviors, using a 15-s interval. Behavioral categories were checked at every interval during each 20-min session in all 23 sessions. Results • The study showed that the boy's social communication increased during treatment and remained higher than baseline at follow-up. An analysis of specific types of social communication showed that the benefits of AAPT were most apparent in the joint-attention and waiting behaviors. Conclusions • The findings provide support for using AAPT as an intervention to facilitate the social communication of children with autism. PMID:26026154

  12. Curved array photoacoustic tomographic system for small animal imaging

    PubMed Central

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

    2008-01-01

    We present systematic characterization of a photoacoustic imaging system optimized for rapid, high-resolution tomographic imaging of small animals. The system is based on a 128-element ultrasonic transducer array with a 5-MHz center frequency and 80% bandwidth shaped to a quarter circle of 25 mm radius. A 16-channel data-acquisition module and dedicated channel detection electronics enable capture of a 90-deg field-of-view image in less than 1 s and a complete 360-deg scan using sample rotation within 15 s. Measurements on cylindrical phantom targets demonstrate a resolution of better than 200 ?m and high-sensitivity detection of 580-?m blood tubing to depths greater than 3 cm in a turbid medium with reduced scattering coefficient ?s?=7.8cm?1. The system is used to systematically investigate the effects of target size, orientation, and geometry on tomographic imaging. As a demonstration of these effects and the system imaging capabilities, we present tomographic photoacoustic images of the brain vasculature of an ex vivo mouse with varying measurement aperture. For the first time, according to our knowledge, resolution of sub-200-?m vessels with an overlying turbid medium of greater than 2 cm depth is demonstrated using only intrinsic biological contrast. PMID:18465970

  13. Mobile satellite communications systems: Toward global personal communications

    Microsoft Academic Search

    John H. Lodge

    1991-01-01

    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

  14. Fractional Fourier domain communication system: System structure and signal modeling

    Microsoft Academic Search

    Yonggang Chi; Shengyu Zhang; Jun Shi

    2011-01-01

    In Transform Domain Communication System (TDCS), the traditional methods of spectrum sensing and interference mitigation have some unavoidable shortcomings in the non-stationary scenarios. On this consideration, fractional Fourier transform is introduced into TDCS to obtain a better performance in processing the non-stationary signals, like linear chirp signals. By rotating a certain angle in time-frequency plane, chirp signal will concentrate in

  15. Communication architecture tuners: a methodology for the design of high-performance communication architectures for systems-on-chips

    Microsoft Academic Search

    Kanishka Lahiri; Anand Raghunathan; Ganesh Lakshminarayana; Sujit Dey

    2000-01-01

    In this chapter, we present a general methodology for the design of custom system-on-chip communication architectures. Our technique is based on the addition of a layer of circuitry, called the Communication Architecture Tuner (CAT), around any existing communication architecture topology. The added layer enhances the ability of the system to adapt to changing communication needs of its constituent components. For

  16. Data communications-Oriented Production System Language (CPSL)

    NASA Astrophysics Data System (ADS)

    Tolendino, L. F.; Vahle, M. C.

    1985-05-01

    The growing need for data communications support and the limited manpower available prompted research into the benefits of expert systems. A LISP-based production system language, CPSL is described which was designed to expedite the development of expert systems. While CPSL has been used to develop an expert system for the design of fiber optic-based communications circuits, it is certainly not limited to such applications. CPSL is applicable to many expert system implementations.

  17. Iridium{reg_sign} worldwide personal communication system

    SciTech Connect

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

    1997-01-01

    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.}

  18. Future proofing your system with power, control and communication cables

    Microsoft Academic Search

    L. King; J. Pryma; G. Spisak; W. D. Wilkens

    1990-01-01

    The latest trends and anticipated future developments in power, control, and communication cables that are expected to impact the design, construction, and maintenance of power distribution systems in rural areas are discussed. Developments relating to medium-voltage power cable, control and instrumentation cables, communication wire and cable, and supervisory control and data acquisition systems are considered. The probable impact of optical

  19. Silex - The first European optical space communications system

    Microsoft Academic Search

    B. Laurent; J. P. Camus; E. Sein

    1989-01-01

    Silex (Semiconductor Laser Intersatellite Link Experiment), an experimental space communication system aimed at demonstrating in orbit, and in full scale, the feasibility and performances of optical communications between satellites, is discussed. The baseline system configuration comprises a GEO terminal aboard the ESA SAT 2 satellite and a LEO terminal aboard the French SPOT IV remote-sensing satellite. Silex uses semiconductor laser

  20. Secure electronic commerce communication system based on CA

    Microsoft Academic Search

    Deyun Chen; Junfeng Zhang; Shujun Pei

    2001-01-01

    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

  1. Quality Management using RFID and Third Generation Mobile Communications Systems

    Microsoft Academic Search

    Ng Hon; Wilton Fok; Edward Wong; Zongwei Luo

    2006-01-01

    Quality management, radio frequency identification (RFID) and third generation mobile communications systems (3G) are increasing attracting the attention of corporate managers. This paper illustrates the convergence of the three seemingly independent initiatives. RFID provides data inputs into the company's quality improvement systems, such as Six Sigma, while 3G supports realtime data communications between remote RFID devices and enterprise applications. RFID

  2. Secure Optical Communication Systems based on Chaotic Carriers

    E-print Network

    Kouroupetroglou, Georgios

    different encoding techniques are employed and the performance of an optical chaotic communications system in this study. Finally, the effects of transmission in optical fiber are studied for a chaotic communications of the system's performance due to fiber transmission impairments is confronted by the employment of various

  3. Low earth orbit satellite based communication systems — Research opportunities

    Microsoft Academic Search

    Bezalel Gavish

    1997-01-01

    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

  4. A process for free-space laser communications system design

    Microsoft Academic Search

    Frederick G. Walther; John D. Moores; Robert J. Murphy; Steven Michael; George A. Nowak

    2009-01-01

    We present a design methodology for free-space laser communications systems. The first phase includes a characterization through numerical simulations of the channel to evaluate the range of extinction and scintillation. The second phase is the selection of fade mitigation schemes, which would incorporate pointing, acquisition, tracking, and communication system parameters specifically tailored to the channel. Ideally, the process would include

  5. Radio-wave propagation for space communications systems

    Microsoft Academic Search

    L. J. Ippolito

    1981-01-01

    The most recent information on the effects of Earth's atmosphere on space communications systems is reviewed. The design and reliable operation of satellite systems that provide the many applications in space which rely on the transmission of radio waves for communications and scientific purposes are dependent on the propagation characteristics of the transmission path. The presence of atmospheric gases, clouds,

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

    SciTech Connect

    Herter, Karen; Wayland, Seth

    2008-10-31

    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.

  7. DOLPHIN for inter-vehicle communications system

    Microsoft Academic Search

    K. Tokuda; M. Akiyama; H. Fujii

    2000-01-01

    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

  8. Superconductors and cryogenics for future communication systems

    Microsoft Academic Search

    Matthias Klauda; T. Kasser; B. Mayer; C. Neumann; F. Schnell; B. Aminov; A. Baumfalk; H. Chaloupka; S. Kolesov; H. Piel; N. Klein; S. Schornstein; M. Bareiss

    2000-01-01

    In the framework of a German research program on “superconductors and ceramics for future communication technology”, efforts are undertaken to demonstrate the feasibility of cryogenic and high-temperature superconductor technology for applications in communication satellites and base transceiver stations (BTS's) for terrestrial mobile communication. For the receiver front end of C-band satellites, noise reduction filters as well as input-multiplexer channel filters

  9. Space Shuttle program communication and tracking systems interface analysis

    NASA Technical Reports Server (NTRS)

    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

    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.

  10. Communications and control for electric power systems

    NASA Technical Reports Server (NTRS)

    Kirkham, H.

    1992-01-01

    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.

  11. Rapid Polarization Activity in Optical Communication Systems

    NASA Astrophysics Data System (ADS)

    Yevick, David; Reimer, Michael; Soliman, George

    2010-03-01

    We have recently analyzed the high-speed polarization and polarization-mode-dispersion (PMD) transients associated with mechanical impacts on a dispersion compensation module consisting of several km of optical fiber. These generate in our experiments rotational frequencies of up to several hundred radians/sec on the Poincare sphere that can severely degrade the performance of both standard and non-conventional communications systems. Accordingly, we implemented several procedures for performing high-speed polarization measurements, employed these to analyze small and large amplitude excitations and compared the results with a heuristic fiber model. Theoretically, we extended our previous work on applying the Magnus expansion to the analysis of the dependence of the PMD and polarization-dependent-loss (PDL) on frequency. From these, we obtained simple procedures for modeling polarization behavior over a wide frequency range from a small number of experimental measurements. Finally, we analyzed the applicability of various models of stochastic time-dependent refractive index variations to system outage prediction.

  12. Gas Main Sensor and Communications Network System

    SciTech Connect

    Hagen Schempf

    2006-05-31

    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.

  13. Design of high performance frequency synthesizers in communication systems

    E-print Network

    Moon, Sung Tae

    2005-08-29

    Frequency synthesizer is a key building block of fully-integrated wireless communication systems. Design of a frequency synthesizer requires the understanding of not only the circuit-level but also of the transceiver system-level considerations...

  14. An optical system for line-of-sight communication

    E-print Network

    Mehta, Agustya R

    2009-01-01

    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 ...

  15. Developing an Approach for Analyzing and Verifying System Communication

    NASA Technical Reports Server (NTRS)

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

    2009-01-01

    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.

  16. Communication.

    ERIC Educational Resources Information Center

    Strauss, Andre

    The following essays on communication are presented: communication as a condition of survival, communication for special purposes, the means of transmission of communication, communication within social and economic structures, the teaching of communication through the press, the teaching of modern languages, communication as a point of departure,…

  17. Anomaly Detection in Animal-Related Failures in Overhead Distribution Systems

    Microsoft Academic Search

    Min Gui; A. Pahwa; S. Das

    2007-01-01

    Occurrences of faults in overhead distribution systems are a significant factor in distribution system reliability. Analysis of animal-related failures has a practical value since animals cause large number of faults in overhead distribution systems. The artificial immune system approach for self-nonself discrimination and its application to anomaly detection problems in engineering is showing great promise. This paper presents a method

  18. Yamal satellite communication and broadcast system

    Microsoft Academic Search

    V. V. Remizov; B. V. Budzuliak; V. I. Rostenko; N. N. Sevastianov; N. I. Nagorny

    1998-01-01

    Management of such a large company as Gasprom is a complex task requiring permanent broadening of the sphere of application and updating of the information technologies. Having this in mind, since the 1990s Gasprom's top managers have been working towards modernization and updating of its technological communication network (TCN) on a modern technical basis. Gasprom communications network, one of the

  19. Communication protocol evaluation for embedded systems

    Microsoft Academic Search

    Jean-charles Tournier; Jean-philippe Babau

    2003-01-01

    Modern automotive applications become more and more complex: they are implemented over distributed architectures that include several electronic control units (ECUs) communicating via a local communication network which is event triggered (e.g. CAN, controller area network) or time triggered (e.g. TTCAN, time triggered CAN). These ECUs exchange data or messages in two possible modes: push or pull. A key design

  20. Single Switch Chinese Phonetic Communication System

    Microsoft Academic Search

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

    2002-01-01

    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.

  1. An integrated, underwater optical \\/acoustic communications system

    Microsoft Academic Search

    N. Farr; A. Bowen; J. Ware; C. Pontbriand; M. Tivey

    2010-01-01

    Communication underwater is severely limited when compared to communications in air because water is essentially opaque to electromagnetic radiation except in the visible band. Even in the visible band, light penetrates only a few hundred meters in the clearest waters and much less in waters made turbid by suspended sediment or high concentrations of marine life. Consequently, acoustic techniques have

  2. Fiber Optic Broad Band Communications Systems-Design And Realizations

    NASA Astrophysics Data System (ADS)

    Kreutzer, Heinrich W.; Hermes, Thomas

    1982-01-01

    The paper will discuss individual parameters of fiber optic broadband communications system design and will review systems being installed or projected around the world, regarding the feasibilities of fiber optics. Emphasis will be given to the application of distributed control switching. Finally the experimental communications system of the Heinrich-Hertz-Institut, Berlin, a fiber optic system with distributed control at high bandwidth will be presented and discussed.

  3. Communications Satellite System by Using Moon Orbit Satellite Constellation

    Microsoft Academic Search

    Sang-Uk Lee; Jae-Hoon Kim; Seong-Pal Lee

    2003-01-01

    A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in this paper. LEO satellite constellation has been another choice of communications system. The proposed system which is alternatives of limited geostationary orbit resources, has some weak points such as long distance from the Earth, relatively expensive launch

  4. Development of A General Principle Solution Forisoagrinet Compliant Networking System Components in Animal Husbandry

    NASA Astrophysics Data System (ADS)

    Kuhlmann, Arne; Herd, Daniel; Rö?ler, Benjamin; Gallmann, Eva; Jungbluth, Thomas

    In pig production software and electronic systems are widely used for process control and management. Unfortunately most devices on farms are proprietary solutions and autonomically working. To unify data communication of devices in agricultural husbandry, the international standard ISOagriNET (ISO 17532:2007) was developed. It defines data formats and exchange protocols, to link up devices like climate controls, feeding systems and sensors, but also management software. The aim of the research project, "Information and Data Collection in Livestock Systems" is to develop an ISOagriNET compliant IT system, a so called Farming Cell. It integrates all electronic components to acquire the available data and information for pig fattening. That way, an additional benefit to humans, animals and the environment regarding process control and documentation, can be generated. Developing the Farming Cell is very complex; in detail it is very difficult and long-winded to integrate hardware and software by various vendors into an ISOagriNET compliant IT system. This ISOagriNET prototype shows as a test environment the potential of this new standard.

  5. Queuing and routing in a hierarchical powerline communication system

    Microsoft Academic Search

    Filipe PACHECO; Luis Miguel PINHO; Eduardo TOVAR

    2005-01-01

    Although power-line communication (PLC) is not a new technology, its use to support data communication with timing requirements is still the focus of ongoing research. A new infrastructure intended for communication using power lines from a central location to dispersed nodes using inexpensive devices was presented recently. This new infrastructure uses a two-level hierarchical power-line system, together with an IP-based

  6. Interference analysis for an Aeronautical Mobile Airport Communications System

    Microsoft Academic Search

    Jeffrey D. Wilson; Robert J. Kerczewski

    2011-01-01

    The next generation of aeronautical communications for airport surface applications has been identified through a NASA research program and an international collaborative future communications study. The result, endorsed by both the United States and European regulatory agencies is called AeroMACS (Aeronautical Mobile Airport Communications System) and is based upon the IEEE 802.16e mobile wireless standard. Coordinated efforts to develop appropriate

  7. PM: An Operating System Coordinated High Performance Communication Library

    Microsoft Academic Search

    Hiroshi Tezuka; Atsushi Hori; Yutaka Ishikawa; Mitsuhisa Sato

    1997-01-01

    . 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

  8. Complex Biological Memory Conceptualized as an Abstract Communication System–Human Long Term Memories Grow in Complexity during Sleep and Undergo Selection while Awake

    Microsoft Academic Search

    Bruce G. Charlton; Peter Andras

    Biological memory in humans and other animals with a central nervous system is often extremely complex in its organization\\u000a and functioning.A description of memory from the perspective of complex systems may therefore be useful to interpret and understand\\u000a existing neurobiological data and to plan future research. We define systems in terms of communications.A system does not\\u000a include the communication units

  9. Family: Family: Function Broadcast Communications Publications and Production Function: Applications Programming Information Systems

    E-print Network

    Westerling, Anthony L.

    : ·Applications Programming ·Information Systems ·Electronic Communications ·Visual Communications ·AV IT ·IT Training ·Health Education ·Admissions/Recruitment ·Student Academic Advising ·Counseling Architecture ·General Communications ·Written Communications ·AV IT Engineering ·IT Security ·Media

  10. AN EXPERT SYSTEM FOR WEATHER PREDICTION BASED ON ANIMAL BEHAVIOUR

    Microsoft Academic Search

    Najat O. Alsaiari

    Long before technology was developed, people had to rely on observations, patterns and their experience to predict the weather. Observers reported that the animals have senses that warned them of weather by several hours or just seconds, which allowed animals and people to heed those warnings for the chance to find safety. People sometimes are out of touch with weather

  11. AN EXPERT SYSTEM FOR WEATHER PREDICTION BASED ON ANIMAL BEHAVIOUR

    Microsoft Academic Search

    Najat O. Alsaiari

    2012-01-01

    Long before technology was developed, people had to rely on observations, patterns and their experience to predict the weather. Observers reported that the animals have senses that warned them of weather by several hours or just seconds, which allowed animals and people to heed those warnings for the chance to find safety. People sometimes are out of touch with weather

  12. Satellite communications systems and technology. Volume 1: Analytical chapters

    NASA Technical Reports Server (NTRS)

    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

    This is Volume 1 (Analytical Chapters) of the final report of the NASA/NSF Panel Satellite Communications Systems and Technology. The panel surveyed advanced technology being developed for commercial use in the satellite communications field in Europe, Japan, and Russia. All aspects of satellite communications were considered, including fixed, broadcast, mobile, personal communications, navigation, low earth orbit, and small satellites. The focus was on experimental and advanced technology being developed in R&D and demonstration programs rather than on today's production capabilities. Focus was on commercial satellite technology, and does not review defense-related or other confidential satellite communications capabilities. The NASA/NSF panel concluded that the United States has lost its leading position in many critical satellite communications technologies. Although U.S. industry retains a leading position in today's marketplace for satellite communications systems and services, this position is largely founded on technologies and capabilities developed in the 1960's and 1970's. Because the United States is losing ground with respect to a wide range of technologies and systems that will be key to future communications markets, the market share of the U.S. satellite communications industry is at risk.

  13. Satellite communications systems and technology. Volume 1; Analytic Chapters

    NASA Technical Reports Server (NTRS)

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

    1993-01-01

    Volume 1 (Analytical Chapters) of the final report of the NASA/NSF Panel Satellite Communications Systems and Technology is presented. The panel surveyed advanced technology being developed for commercial use in the satellite communications field in Europe, Japan, and Russia. All aspects of satellite communications were considered, including fixed, broadcast, mobile, personal communications, navigation, low earth orbit, and small satellites. The focus of the study was on experimental and advanced technology being developed in R&D and demonstration programs rather than on today's production capabilities. The report focuses on commercial satellite technology, and does not review defense-related or other confidential satellite communications capabilities. The NASA/NSF panel concluded that the United States has lost its leading position in many critical satellite communications technologies. Although U.S. industry retains a leading position in today's marketplace for satellite communications systems and services, this position is largely founded on technologies and capabilities developed in the 1960s and 1970s. Because the United States is losing ground with respect to a wide range of technologies and systems that will be key to future communications markets, the market share of the U.S. satellite communications industry is at risk.

  14. Animals and the invention of the Phanerozoic Earth system.

    PubMed

    Butterfield, Nicholas J

    2011-02-01

    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

  15. The transmission link of CAPS navigation and communication system

    NASA Astrophysics Data System (ADS)

    Cui, Junxia; Shi, Huli; Chen, Jibin; Pei, Jun

    2009-03-01

    The Chinese Area Positioning System (CAPS) is based on communication satellites with integrated capability, which is different from the Global Positioning System (GPS), the International Maritime Satellite Organization (Inmarsat) and so on. CAPS works at C-band, and its navigation information is not directly generated from the satellite, but from the master control station on the ground and transmitted to users via the satellite. The slightly inclined geostationary-satellite orbit (SIGSO) satellites are adopted in CAPS. All of these increase the difficulty in the design of the system and terminals. In this paper, the authors study the CAPS configuration parameters of the navigation master control station, information transmission capability, and the selection of the antenna aperture of the communication center station, as well as the impact of satellite parameters on the whole communication system from the perspective of the transmission link budget. The conclusion of availability of the CAPS navigation system is achieved. The results show that the CAPS inbound communication system forms a new low-data-rate satellite communication system, which can accommodate mass communication terminals with the transmission rate of no more than 1 kbps for every terminal. The communication center station should be configured with a large-aperture antenna (about 10-15 m); spread spectrum communication technology should be used with the spreading gain as high as about 40 dB; reduction of the satellite transponder gain attenuation is beneficial to improving the signal-to-noise ratio of the system, with the attenuation value of 0 or 2 dB as the best choice. The fact that the CAPS navigation system has been checked and accepted by the experts and the operation is stable till now clarifies the rationality of the analysis results. The fact that a variety of experiments and applications of the satellite communication system designed according to the findings in this paper have been successfully carried out confirms the correctness of the study results.

  16. 14 CFR 1221.108 - Establishment of the NASA Unified Visual Communications System.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...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...

  17. Concepts for fast acquisition in optical communications systems

    NASA Astrophysics Data System (ADS)

    Wilkerson, Brandon L.; Giggenbach, Dirk; Epple, Bernhard

    2006-09-01

    As free-space laser communications systems proliferate due to improved technology and transmission techniques, optical communication networks comprised of ground stations, aircraft, high altitude platforms, and satellites become an attainable goal. An important consideration for optical networks is the ability of optical communication terminals (OCT) to quickly locate one another and align their laser beams to initiate the acquisition sequence. This paper investigates promising low-cost technologies and novel approaches that will facilitate the targeting and acquisition tasks between counter terminals. Specifically, two critical technology areas are investigated: position determination (which includes location and attitude determination) and inter-terminal communications. A feasibility study identified multiple-antenna global navigation satellite system (GNSS) systems and GNSS-aided inertial systems as possible position determination solutions. Personal satellite communication systems (e.g. Iridium or Inmarsat), third generation cellular technology (IMT-2000/UMTS), and a relatively new air traffic surveillance technology called Autonomous Dependent Surveillance-Broadcast (ADS-B) were identified as possible inter-terminal communication solutions. A GNSS-aided inertial system and an ADS-B system were integrated into an OCT to demonstrate their utility in a typical optical communication scenario. Testing showed that these technologies have high potential in future OCTs, although improvements can be made to both to increase tracking accuracy.

  18. An Isolated Working Heart System for Large Animal Models

    PubMed Central

    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

    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

  19. A polarization shift-keying system for underwater optical communications

    Microsoft Academic Search

    William C. Cox; Brian L. Hughes; John F. Muth

    2009-01-01

    A compact and simple setup for testing polarization modulation in the underwater channel is demonstrated. The results from this system compare favorably to a non-polarization modulation system utilizing on-off keying modulation. This system will allow future work to explore using polarization in optical communication systems underwater. The advantages of such systems include ability to monitor the water quality of the

  20. Affective communication system with multimodality for a humanoid robot, AMI

    Microsoft Academic Search

    Hye-Won Jung; Yong-Ho Scot; M. Sahngwon Ryoo; Hyun S. Yang

    2004-01-01

    Nonverbal communication plays a vital role in human interaction. To interact sociably with a human, a robot has to recognize and express emotions like a human. It also has to speak and determine its autonomous behavior while considering the emotional status of a human. In this paper, we present an affective human-robot communication system for a humanoid robot, AMI that

  1. Opportunistic Communications for Networked Controlled Systems of Autonomous Vehicles

    E-print Network

    Baras, John S.

    Opportunistic Communications for Networked Controlled Systems of Autonomous Vehicles Hua Chen of communication connectivity in networks of autonomous vehicles. It is difficult to overcome deep fading from time of autonomous vehicles with energy con- sumption and total operation time constraints in an adversarial

  2. A Dispatch-Mediated Communication Model for Emergency Response Systems

    E-print Network

    Upadhyaya, Shambhu

    2 A Dispatch-Mediated Communication Model for Emergency Response Systems ROHIT VALECHA and RAJ of emergency communication is dispatch-mediated (the messages from the scene are directed towards the responders and agencies through the dispatch agency). These messages are logged in electronic documents

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

    E-print Network

    Gesbert, David

    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

  4. Satellite communications systems and technology. Volume 2; Site Reports

    NASA Technical Reports Server (NTRS)

    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

    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.

  5. Standardized field bus would improve integrated computer system communications

    SciTech Connect

    Reif, D.R.

    1989-02-13

    A standardized communications protocol for the field bus between various components of a control system and main computer would allow better flexibility of the use of field device and communication methods. How the standard could be organized, and current work on standardization, are discussed in this article.

  6. Accent: A Communication Oriented Network Operating System Kernel

    Microsoft Academic Search

    Richard F. Rashid; George G. Robertson

    1981-01-01

    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

  7. The Use of Multiple Communication in Systemic Couples Therapy.

    ERIC Educational Resources Information Center

    Keeney, Bradford P.; Siegel, Stanley

    1986-01-01

    Presents a clinical technique for working with troubled couples based on a particular theory of multiple communication in therapy. The technique, a "systemic couples reversal," prescribes a way of managing the multiple communications of stability, change, and meaningful Rorschach. Provides a theoretical map, clinical procedure, and clinical case…

  8. A Study on Communication Issues for Systems-on-Chip

    Microsoft Academic Search

    Cesar A. Zeferino; Márcio E. Kreutz; Luigi Carro; Altamiro A. Susin

    2002-01-01

    Present days cores composing a System-on-Chip might be interconnected by means of both dedicated channels or shared buses. Nevertheless, future systems will have strong requirements on reusability and communication performance, which will constrain the use of such interconnect systems. An emerging approach, the Networks-on-Chip (NOCs), will potentially fulfill those requirements, because NOCs are reusable and their communication performance gracefully scales

  9. 60GHz Monolithic LTCC Module for Wireless Communication Systems

    Microsoft Academic Search

    T. Seki; K. Nishikawa; Y. Suzuki; I. Toyoda; K. Tsunekawa

    2006-01-01

    A highly integrated RF module, the so-called system-on-package module, which employs a multi-layer structure, is effective in achieving high-speed wireless communication systems that have a transmission rate higher than 1 Gb\\/s at millimeter-wave frequencies. We present a 12times12times1.2 mm3 compact monolithic low temperature co-fired ceramic (LTCC) transmitter module for 60-GHz wireless communication systems. The MMIC includes the power amplifier circuit,

  10. 60GHz Monolithic LTCC Module for Wireless Communication Systems

    Microsoft Academic Search

    T. Seki; K. Nishikawa; Y. Suzuki; I. Toyoda; K. Tsunekawa

    2006-01-01

    A highly integrated RF module, the so-called system-on-package module, which employs a multi-layer structure, is effective in achieving high-speed wireless communication systems that have a transmission rate higher than 1 Gb\\/s at millimeter-wave frequencies. We present a 12 times 12 times 1.2 mm compact monolithic low temperature co-fired ceramic (LTCC) transmitter module for 60-GHz wireless communication systems. The MMIC includes

  11. A satellite system for land-mobile communications in Europe

    NASA Astrophysics Data System (ADS)

    Bartholome, P.; Rogard, R.

    1988-05-01

    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.

  12. Ad-Hoc Communication and Localization System for Mobile Robots

    NASA Astrophysics Data System (ADS)

    Neuwinger, Bernd; Witkowski, Ulf; Rückert, Ulrich

    Robots exploring unknown territory cannot rely on fixed infrastructure for communication and localization purposes. Therefore an ad-hoc communication and localization system is required to provide such facilities. In this paper a solution for a radio based localization system is presented using a 2.4 GHz wireless radio transceiver based on Chirp Spread Spectrum (CSS) modulation, which allows distance measurements by evaluating the signal propagation delay. Using odometry data as additional information source a communication and positioning system is developed fulfilling ad-hoc demands.

  13. Communication-based positioning systems: past, present and prospects

    NASA Astrophysics Data System (ADS)

    Ma, Guan-Yi; Wan, Qing-Tao; Gan, Tong

    2012-06-01

    This paper reviews positioning systems in the context of communication systems. First, the basic positioning technique is described for location based service (LBS) in mobile communication systems. Then the high integrity global positioning system (iGPS) is introduced in terms of aspects of what it is and how the low Earth orbit (LEO) Iridium telecommunication satellites enhance the global positioning system (GPS). Emphasis is on the Chinese Area Positioning System (CAPS) which is mainly based on commercial geostationary (GEO) communication satellites, including decommissioned GEO and inclined geosynchronous communication satellites. Characterized by its low cost, high flexibility, wide-area coverage and ample frequency resources, a distinctive feature of CAPS is that its navigation messages are generated on the ground, then uploaded to and forwarded by the communication satellites. Fundamental principles and key technologies applied in the construction of CAPS are presented in detail from the CAPS validation phase to its experimental system setup. A prospective view of CAPS has concluded it to be a seamless, high accuracy, large capacity navigation and communication system which can be achieved by expanding it world wide and enhancing it with LEO satellites and mobile base stations. Hence, this system is a potential candidate for the next generation of radio navigation after GPS.

  14. ATCOM: Automatically Tuned Collective Communication System for SMP Clusters

    SciTech Connect

    Meng-Shiou Wu

    2005-12-17

    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.

  15. Patient Instructions to complete the Animal Contact Risk Questionnaire for UHS An online system has been created to allow you to complete the Animal Contact Risk

    E-print Network

    Wisconsin at Madison, University of

    been created to allow you to complete the Animal Contact Risk Questionnaire. This is a mandatoryPatient Instructions to complete the Animal Contact Risk Questionnaire for UHS An online system has requirement for all UW staff, students, and visitors having access to animals in the course of their work

  16. Effect of latrogenic trauma on the bone scintigram: an animal study. Concise communication. [Rabbits

    SciTech Connect

    Alazraki, N.; Moitoza, J.; Heaphy, J.; Taylor, A. Jr.

    1984-09-01

    An animal study was performed to assess the effect on the Tc-99m phosphate bone scintigram of injury by needle aspiration or drill hole to metaphyseal and diaphyseal areas in immature and mature bones. Results showed that in 12 immature rabbits such trauma to metaphyseal regions had no effect on the bone image. Similar metaphyseal trauma in two mature dogs showed definite abnormalities on the bone image, but in one mature rabbit, no abnormality could be identified by scintigram. Diaphyseal trauma always gave a definitely abnormal bone image. Extrapolation of these results to humans should be cautious, but it suggests that needling or drilling in metaphyseal regions in neonates or young children probably does not affect later bone images.

  17. Vocal performance affects metabolic rate in dolphins: implications for animals communicating in noisy environments.

    PubMed

    Holt, Marla M; Noren, Dawn P; Dunkin, Robin C; Williams, Terrie M

    2015-06-01

    Many animals produce louder, longer or more repetitious vocalizations to compensate for increases in environmental noise. Biological costs of increased vocal effort in response to noise, including energetic costs, remain empirically undefined in many taxa, particularly in marine mammals that rely on sound for fundamental biological functions in increasingly noisy habitats. For this investigation, we tested the hypothesis that an increase in vocal effort would result in an energetic cost to the signaler by experimentally measuring oxygen consumption during rest and a 2 min vocal period in dolphins that were trained to vary vocal loudness across trials. Vocal effort was quantified as the total acoustic energy of sounds produced. Metabolic rates during the vocal period were, on average, 1.2 and 1.5 times resting metabolic rate (RMR) in dolphin A and B, respectively. As vocal effort increased, we found that there was a significant increase in metabolic rate over RMR during the 2 min following sound production in both dolphins, and in total oxygen consumption (metabolic cost of sound production plus recovery costs) in the dolphin that showed a wider range of vocal effort across trials. Increases in vocal effort, as a consequence of increases in vocal amplitude, repetition rate and/or duration, are consistent with behavioral responses to noise in free-ranging animals. Here, we empirically demonstrate for the first time in a marine mammal, that these vocal modifications can have an energetic impact at the individual level and, importantly, these data provide a mechanistic foundation for evaluating biological consequences of vocal modification in noise-polluted habitats. PMID:25852069

  18. The design of static and mobile HF communication systems

    NASA Astrophysics Data System (ADS)

    Darnell, M.

    1986-03-01

    The lecture deals with more specific aspects of HF communication system design arising from a previous lecture entitled HF system design principles presented as part of AGARD Lecture Series 127 in 1983. The major topics considered are: (1) the design of point-to-point systems; (2) the design of systems involving mobile terminals; (3) system control and frequency management; (4) resistance to interception and disruption. The lecture is intended to provide a technical framework for later lectures covering the more detailed aspects of HF communication system design.

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

    PubMed Central

    Richardson, Joshua E; Ash, Joan S

    2010-01-01

    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 using a grounded theory approach. Because this study was exploratory, data were coded and patterns identified until overall themes ‘emerged’. Results Five themes arose: (1) Communication access—the perception that HCD systems provide fast and efficient communication that supports workflow; (2) Control—social and technical considerations associated with use of an HCD system; (3) Training—processes that should be used to improve use of the HCD system; (4) Organizational change—changes to organizational design and behavior caused by HCD system implementation; and (5) Environment and infrastructure—HCD system use within the context of physical workspaces. Conclusion HCD systems improve communication access but users experience challenges integrating the system into workflow. Effective HCD use depends on how well organizations train users, adapt to changes brought about by HCD systems, and integrate HCD systems into physical surroundings. PMID:20064808

  20. Smart Data Node in the Sky (SDNITS): communications system

    NASA Technical Reports Server (NTRS)

    Kantak, A.; Lansing, F.

    2003-01-01

    In this paper we will discuss: the steps for adequately designing such a complex telecommunications system 'Smart Data Node In The Sky (SDNITS)'; algorithm development for this process; specifications to be levied on the interfacing subsystems; type of the system e.g., the usual Radio Frequency system or a laser communications system.

  1. 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

  2. Studying Gestures: The Iconic Roots of Human Communication Systems 

    E-print Network

    Ioannou, Charis

    2011-11-23

    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...

  3. Vital Signs Acquisition and Communication System Board Implementation

    E-print Network

    Jantsch, Axel

    Acquisition and Communication System (VACS), is a bio-signal processing platform. It consists of vital signs implementation work mainly focuses on ECG signal processing and makes some basic investigations on the remaining

  4. Simulation of models and algorithms for wireless communication systems

    E-print Network

    Jabbour, Imad W

    2007-01-01

    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, ...

  5. 46 CFR 121.602 - Internal communications systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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)...

  6. 46 CFR 184.602 - Internal communications systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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)...

  7. Circuit-aware system design techniques for wireless communication

    E-print Network

    Huang, Everest W. (Everest Wang)

    2006-01-01

    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 ...

  8. Cultural selection drives the evolution of human communication systems

    PubMed Central

    Tamariz, Monica; Ellison, T. Mark; Barr, Dale J.; Fay, Nicolas

    2014-01-01

    Human communication systems evolve culturally, but the evolutionary mechanisms that drive this evolution are not well understood. Against a baseline that communication variants spread in a population following neutral evolutionary dynamics (also known as drift models), we tested the role of two cultural selection models: coordination- and content-biased. We constructed a parametrized mixed probabilistic model of the spread of communicative variants in four 8-person laboratory micro-societies engaged in a simple communication game. We found that selectionist models, working in combination, explain the majority of the empirical data. The best-fitting parameter setting includes an egocentric bias and a content bias, suggesting that participants retained their own previously used communicative variants unless they encountered a superior (content-biased) variant, in which case it was adopted. This novel pattern of results suggests that (i) a theory of the cultural evolution of human communication systems must integrate selectionist models and (ii) human communication systems are functionally adaptive complex systems. PMID:24966310

  9. Research of a portable atmospheric laser communication system

    NASA Astrophysics Data System (ADS)

    Zeng, Wen-feng; Li, Dong; Li, Shen-peng; Tan, Wei; Yi, Zhigang

    2013-08-01

    A kind of portable atmosphere laser communication system based on fiber technology is designed by using Ethernet transceiver terminal and video-audio transceiver terminal with diode laser module and PIN diode, while a flexible connection is built between the terminal and the optical antenna connected by laser fiber. The application of EDFA technology, which realizes the amplification of the power of the 1550nm laser diode module, brings forth a more stable structure and easier deployment and testing in wild environment, and the communication distance can reach 2 kilometers with a transmission bandwidth of 100 MBit/s. Prototype experiments prove the good communication performance of this system.

  10. A system for analysis and classification of voice communications

    NASA Technical Reports Server (NTRS)

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

    1973-01-01

    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.

  11. An adaptive narrow band frequency modulation voice communication system

    NASA Technical Reports Server (NTRS)

    Wishna, S.

    1972-01-01

    A narrow band frequency modulation communication system is described which provides for the reception of good quality voice at low carrier-to-noise ratios. The high level of performance is obtained by designing a limiter and phase lock loop combination as a demodulator, so that the bandwidth of the phase lock loop decreases as the carrier level decreases. The system was built for the position location and aircraft communication equipment experiment of the ATS 6 program.

  12. Installation of the fiber optic communications underwater system (FOCUS)

    Microsoft Academic Search

    R. Polley; P. B. Yinger

    1993-01-01

    The fiber optic communication underwater system (FOCUS) replaces the microwave communication system linking the Naval Air Warfare Center-Weapons Division Point Mugu facility with their San Nicolas Island (SNI) facility. The MariPro operation of Science Applications International Corporation (SAIC\\/MariPro) was the prime contractor and performed all engineering; furnishing of equipment and installation (EF&I) tasks. The FOCUS will eventually consist of additional

  13. Hardware Implementation of Chaos-Secured Optical Communication Systems

    Microsoft Academic Search

    Apostolos Argyris

    \\u000a In the present chapter, the implementation and performance of contemporary chaotic optical communication systems is presented,\\u000a focusing on the physical layer encryption methods proposed so far. In communication systems that encrypt high-speed data within\\u000a broadband chaotic carriers, authorized users share identical chaotic oscillators that are capable – after synchronization\\u000a – of emitting exactly the same broadband chaotic optical signal. Several

  14. IRECIN Nano-satellite communication system and ground segment

    Microsoft Academic Search

    M. Ferrante; M. Povia; L. Di Ciolo; A. Ortenzi; M. Petrozzi

    2005-01-01

    On board resources necessary to perform the mission tasks are very limited in nano-satellites. This paper proposes a real-time multi-processing system for the communication system between ground segment and IRECIN nano-satellite.The first microprocessor is devoted to interface to the rice-transceiver subsystem decoding packet information and the second one is in charge to communicate with the other subsystems through I2C bus.

  15. Assessment of communication system susceptibility to the PAVE PAWS radar

    NASA Astrophysics Data System (ADS)

    Donaldson, Ernest E., Jr.; Burdett, Robert P., Jr.

    This paper summarizes the results of a program directed to an assessment of the potential for interference to Georgia Power Company communications systems from the PAVE PAWS radar at Robins Air Force Base, GA. Susceptibility data were recorded on selected UHF and microwave receivers and compared to predicted PAVE PAWS field strength levels to identify potential interference problems. Several potential problems were identified which must be addressed to preclude PAVE PAWS related interference effects on communication system performance.

  16. Inter-processor Communication Interface Design in Complementary Multiprocessor Systems

    Microsoft Academic Search

    Pei Ke; Zhang Gang

    2009-01-01

    The latest multiprocessor platforms are ideal for implementing multi-OS embedded applications. IPC (inter-processor communication) interface makes it possible for a multiprocessor system to easily support multiple subsystems parallel processing. In this paper, we propose a new type of OS-level communication interface designing based-on CMPS (complementary multiprocessor system) and present the primary principles and corresponding driver structure of HP I (host-port

  17. HTTP Performance Analysis over Multi-Hops Satellite Communication System

    Microsoft Academic Search

    Hiroyasu Obata; Kenji Ishida; Junichi Funasaka; Satoru Takeuchi; Kouichi Hirose; Katsuyuki Yamazaki

    2004-01-01

    In order to provide a long distance communication such as the one between two nodes separated by about halfway around the earth, a multi-hops satellite communication system which goes through multiple satellites is attractive. Furthermore, in case of disasters, the system is useful as the alternative to submarine optical fiber links. HTTP1.1 (HyperText Transfer Protocol version 1.1) is one of

  18. A nuclear radiation detector system with integrated readout for SPECT\\/MR small animal imaging

    Microsoft Academic Search

    Suleyman Azman; J. Gjaerum; D. Meier; L. T. Muftuler; G. Maehlum; O. Nalcioglu; B. E. Patt; B. Sundal; M. Szawlowski; B. M. W. Tsui; D. J. Wagenaar; Yuchuang Wang

    2007-01-01

    We have developed and constructed an MR-compatible single photon emission computed tomography (SPECT) system for small animal molecular imaging applications. The system consists of identical radiation imaging modules and a multi-pinhole collimator sleeve. The modular design results in a very compact system which allows for easy insertion into state-of-the-art small animal MRI systems. This development leads to a multi-modality system

  19. 26 CFR 49.4253-9 - Exemption for certain interior communication systems.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 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...

  20. 26 CFR 49.4253-9 - Exemption for certain interior communication systems.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 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...

  1. 47 CFR 11.47 - Optional use of other communications methods and systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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)...

  2. 26 CFR 49.4253-9 - Exemption for certain interior communication systems.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 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...

  3. An adaptive digital beamforming network for satellite communication systems

    NASA Astrophysics Data System (ADS)

    Barrett, M.; Fernandez, J.; Lagunas, M. A.; Coromina, F.

    1991-10-01

    The use of adaptive digital beamforming techniques has, until recently, been largely restricted to high performance military radar systems. Recent advances in digital technology, however, have enabled the design of single chip digital beamforming networks. This, coupled with advances in digital signal processor technology, enables complete beamforming systems to be constructed at a lower cost, thus making the application of these techniques to commercial communications systems attractive. The design and development of such an adaptative digital beamforming network are described. The system is being developed as a proof of concept laboratory based demonstrator to enable the feasibility of adaptive digital beamforming techniques for communication systems to be determined. Ultimately, digital beamforming could be used in conjunction with large array antennas for communication satellite systems. This will enable the simultaneous steering of high gain antenna beams in the direction of ground based users and the nulling of unwanted interference sources, such as radar systems, to be performed.

  4. Research of STBC in free space optical communications system

    NASA Astrophysics Data System (ADS)

    Deng, Tianping; Peng, Kai; Lu, Yimin

    2009-12-01

    Free Space Optical (FSO) communication is a communication pattern in which laser is used as the information carrier in atmosphere environment. FSO system has been widely applied in the fields of satellite communication and ground sight distance communication, with a promising application prospect and tremendous market potential. And space-time processing (using multiple antennas) is now recognized as a key to achieving reliable high data rate wireless communications and is being incorporated into the physical layer of many wireless standards. In this letter, error rate performance for space-time block coding (STBC) in FSO communication systems with direct detection operating over strong atmospheric turbulence channels is analyzed. The purpose of the paper is: (i) to determine the channel capacity of FSO system in the presence of atmospheric turbulence, (ii) to see how much this limit can be approached using the best known STBC techniques. In this paper, we use mathematics tool to establish the channel model of FSO system, and then apply the STBC to the FSO system, research the decoding method and simulate the performance using MATLAB tools. The mathematics analysis and simulation results show the great application expectation of STBC in the OOK channel of the FSO system.

  5. Communication architecture tuners: a methodology for the design of high-performance communication architectures for system-on-chips

    Microsoft Academic Search

    Kanishka Lahiri; Anand Raghunathan; Ganesh Lakshminarayana; Sujit Dey

    2000-01-01

    In this paper, we present a general methodology for the design of custom system-on-chip communication architectures. Our technique is based on the addition of a layer of circuitry, called the Communica- tion Architecture Tuner (CAT), around any existing communication architecture topology. The added layer enhances the ability of the system to adapt to changing communication needs of its constituent components.

  6. 298 IEEE COMMUNICATIONS LETTERS, VOL. 2, NO. 11, NOVEMBER 1998 Capacity of DS/CDMA Communication Systems

    E-print Network

    Kim, Sang W.

    298 IEEE COMMUNICATIONS LETTERS, VOL. 2, NO. 11, NOVEMBER 1998 Capacity of DS/CDMA Communication Abstract--We consider frequency overlapped DS/CDMA (FO/ CDMA) communication systems where a number of DS the interference from adjacent bands negligible. When DS/CDMA systems are overlapped, the interference from

  7. ESAT: A Tool for Animating Logic-Based Specifications of Evolvable Component Systems

    E-print Network

    Rydeheard, David

    ESAT: A Tool for Animating Logic-Based Specifications of Evolvable Component Systems Djihed Afifi design methodology and to prototype systems. Furthermore, the animation of logical models enables of the component, and programs over the actions. In this logical framework, compo- nents are specified by first

  8. Emulation of the animal muscular actuation system in an experimental platform

    Microsoft Academic Search

    F. Garcia-Cordova; A. Guerrero-Gonzalez; J. L. Pedreno-Molina; J. C. Moran

    2001-01-01

    This research work involves the design and implementation of an efficient biomechanical model of the animal muscular actuation system. In order to build the biomechanical system to have mechanical properties as close as possible to the human or animal arm, auto-reversible DC motors with appropriate planetary gearboxes and multi-radial flexible couplings (in order to pull and to be pushed), force

  9. Programmable modular joint tactical radio in a communications system environment

    NASA Astrophysics Data System (ADS)

    Dyson, Richard M.; Newman, Alfred V.; Noll, Bruce T.; Russell, Victor C.

    1998-08-01

    The Joint Tactical Radio System (JTRS) is a software programmable and modular communications system that will be interoperable with legacy waveforms. It will also be capable of satisfying new communication system requirements for a multitude of military and civilian land, air, and maritime platforms. A Systems Reference Model has been developed to guide a systems architecture design that will use families of common hardware and software configurations to support requirements of different users. The JTRS is a cost-effective approach that allows users to dynamically change capability by reinitializing application software.

  10. Methods for operating parallel computing systems employing sequenced communications

    DOEpatents

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

    1999-08-10

    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.

  11. Tunnel radio communications system at Stanford Linear Accelerator Center

    SciTech Connect

    Struven, W.C.

    1980-07-01

    A unique single frequency, dual daisy chain tunnel radio communication system has been developed for use in our new Positron-Electron Storage Ring. Communications are possible between portables in the underground ring and between a portable in the ring and all control rooms on the site. The system is designed as a wide band facility and therefore can carry many simplex and duplex transmissions. This system utilizes TV twinlead as a distributed antenna and repeater amplifiers to cover more than 7000 feet of underground tunnel. The design philosophy, tests and initial design are discussed and contrasted with the final implementation of the system. Future uses of the system are discussed.

  12. Communicating and Mobile Systems: The ?-calculus

    Microsoft Academic Search

    Robin Milner

    1999-01-01

    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

  13. Optical Solitons in Fibers for Communication Systems

    Microsoft Academic Search

    M. F. Ferreira; M. V. Facão; S. V. Latas; M. H. Sousa

    2005-01-01

    A brief history of attempts to use solitons for optical fiber communications and of the technical developments toward making soliton transmission practical is reviewed. The main problems affecting long-distance soliton transmission, as well as techniques to solve them, are described. Recent developments concerning the use of dispersion management and some of the remarkable properties of dispersion managed solitons are also

  14. Modelling the heart as a communication system.

    PubMed

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

    2015-04-01

    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

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

    NASA Technical Reports Server (NTRS)

    1976-01-01

    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.

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

    NASA Technical Reports Server (NTRS)

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

    1995-01-01

    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.

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

    Microsoft Academic Search

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

    2008-01-01

    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

  18. Communications for a Picture Archiving Communications System with a parallel operating image data base

    Microsoft Academic Search

    Gerard L. Reijns; Alfred Kayser

    1993-01-01

    In cooperation with BAZIS (Support Group Hospital Information Systems at Leiden, The Netherlands), we started the design of\\u000a a Picture Archiving and Communications System (PACS) a few years ago that contains a centralized image data base. By means\\u000a of system modeling and measuring some performance parameters, we have discovered that such a system cannot provide the required\\u000a response times. This

  19. Study and design of laser communications system for space shuttle

    NASA Technical Reports Server (NTRS)

    1973-01-01

    The design, development and operation are described of the laser communications system developed for potential space shuttle application. A brief study was conducted to identify the need, if any, for narrow bandwidth space-to-space communication on the shuttle vehicles. None have been specifically identified that could not be accommodated with existing equipments. The key technical features developed in this hardware are the conically scanned tracker for optimized track while communicating with a single detector, and the utilization of a common optical carrier frequency for both transmission and detection. This latter feature permits a multiple access capability so that several transceivers can communicate with one another. The conically scanned tracker technique allows the received signal energy to be efficiently divided between the tracking and communications functions within a common detector.

  20. Deformable MEMS mirrors in secure optical communication system

    NASA Astrophysics Data System (ADS)

    Ziph-Schatzberg, Leah; Bifano, Thomas; Cornelissen, Steven; Stewart, Jason; Bleier, Zvi

    2009-05-01

    An optical communication system suitable for voice communication, data retrieval from remote sensors and identification had been designed, built and tested. The system design allows operation at ranges of several hundred meters. The heart of the system is a modulated MEMS mirror that is electrostatically actuated and changes between a flat reflective state and a corrugated diffractive state. A process for mass producing these mirrors at low cost was developed and implemented. The mirror was incorporated as a facet in a hollow retro-reflector, allowing temporal modulation of an interrogating beam and the return of the modulated beam to the interrogator. This modulator unit thus consists of a low power, small and light communication node with large (about 60°) angular extent. The system's range and pointing are determined by the interrogator /detector / demodulator unit (the transceiver), whereas the communicating node remains small, low power and low cost. This transceiver is comprised of a magnified optical channel to establish line of sight communication, an interrogating laser at 1550nm, an avalanche photo diode to detect the return signal and electronics to drive the laser and demodulate the returned signal and convert it to an audio signal. Voice communication in free space was demonstrated at ranges larger than 200 meters. A new retro-reflector design, incorporating more modulated mirrors had been constructed. This configuration was built and tested. Its performance and advantages as compared to the single mirror retro-reflector are discussed. An alternative system design that allows higher bandwidth data transmission is described

  1. Integrated source and channel encoded digital communication system design study

    NASA Technical Reports Server (NTRS)

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

    1978-01-01

    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.

  2. Silicon integration of digital user-end mobile communication systems

    Microsoft Academic Search

    L. Philips; I. Bolsens; A. Rabaeijs; B. Vanhoof; J. Vanhoof; H. De Man

    1993-01-01

    An approach to single-chip integration of digital user-end mobile communication systems is presented. The characteristics of this class of DSP (digital signal processing) systems define the requirements of the proposed system architecture and system design environment. A distributed control approach has been chosen. The system design environment provides high-level system synthesis towards mixed architectural styles and silicon assembly in mixed

  3. Affective Communication in Online Chat Using Physiological Sensors and Animated Text

    E-print Network

    Igarashi, Takeo

    messenger client that measures a user's GSR (galvanic skin response) and reflects that information physiological sensors, the system uses the user's manual control to indicate the valence of the current

  4. Development of a radiative transport based, fluorescence-enhanced, frequency-domain small animal imaging system

    E-print Network

    Rasmussen, John C.

    2009-05-15

    Herein we present the development of a fluorescence-enhanced, frequency-domain radiative transport reconstruction system designed for small animal optical tomography. The system includes a time-dependent data acquisition instrument, a radiative...

  5. The introduction of expert systems in animal husbandry

    Microsoft Academic Search

    J. F. Schreinemakers; M. L. Vos; A. Brand; D. S. Brée; J. H. M. Verheijden

    1988-01-01

    The intensive nature of modern animal husbandry has changed the environmental conditions, so that protection against diseases, especially those caused by secondary pathogenic organisms, becomes an increasing concern. Production inefficiencies become more and more important. Because of their complex nature, many associated problems cannot be solved by farmers alone. With the introduction of information technology in the form of expert

  6. Antioxidant system of Black Sea animals in early development

    Microsoft Academic Search

    I. I. Rudneva

    1999-01-01

    Activities of lipoxygenase, catalase, superoxide dismutase, peroxidase, glutathione reductase and content of low molecular weight antioxidants were determined in eggs and larvae of some molluscs, crustaceans, elasmobranchs and teleost fish of the Black Sea. The enzyme activities and concentrations of low molecular weight antioxidants showed marked interspecies differences, depending on specific developmental peculiarities. During marine animal embryogenesis the activities of

  7. N 2O EMISSIONS FROM ANIMAL WASTE MANAGEMENT SYSTEMS

    Microsoft Academic Search

    Barbara Amon; John van Aardenne; Robert Hoppaus; Thomas Martinsen; Carolien Kroeze

    Livestock and poultry excrements (dung and urine) contain nitrogen that is substrate for microbial nitrification and denitrification processes. A gaseous nitrogen species that is released from these processes into the atmosphere is nitrous oxide (N2O). This paper provides some background information for the proper estimation of N2O emissions from animal waste (produced by livestock and poultry) during storage and treatment

  8. RFID for poultry traceability system at animal checkpoint

    Microsoft Academic Search

    W. Chansud; J. Wisanmongkol; U. Ketprom

    2008-01-01

    Since the first outbreak of avian flu, the ability to discover the origin of the disease as soon as possible is highly required. To trace back to the origin, it is necessary to identify and verify the source of information. Radio Frequency Identification or RFID is a popular tool to identify animal and automatically collect information for traceability purpose. In

  9. The biological action of saponins in animal systems: a review

    Microsoft Academic Search

    George Francis; Zohar Kerem; Harinder P. S. Makkar; Klaus Becker

    2002-01-01

    Saponins are steroid or triterpenoid glycosides, common in a large number of plants and plant products that are important in human and animal nutrition. Several biological effects have been ascribed to saponins. Extensive research has been carried out into the membrane-permeabilis- ing, immunostimulant, hypocholesterolaemic and anticarcinogenic properties of saponins and they have also been found to significantly affect growth, feed

  10. Designing an Algorithm Animation System To Support Instructional Tasks.

    ERIC Educational Resources Information Center

    Hamilton-Taylor, Ashley George; Kraemer, Eileen

    2002-01-01

    The authors are conducting a study of instructors teaching data structure and algorithm topics, with a focus on the use of diagrams and tracing. The results of this study are being used to inform the design of the Support Kit for Animation (SKA). This article describes a preliminary version of SKA, and possible usage scenarios. (Author/AEF)

  11. Remote Laboratory and Animal Behaviour: An Interactive Open Field System

    ERIC Educational Resources Information Center

    Fiore, Lorenzo; Ratti, Giovannino

    2007-01-01

    Remote laboratories can provide distant learners with practical acquisitions which would otherwise remain precluded. Our proposal here is a remote laboratory on a behavioural test (open field test), with the aim of introducing learners to the observation and analysis of stereotyped behaviour in animals. A real-time video of a mouse in an…

  12. RESEARCH OF ANIMAL DISEASE INFORMATION SYSTEM BASED ON GIS

    E-print Network

    Boyer, Edmond

    -occurring disease with regional feature, and the animal husbandry and veterinary health institutions are all closely Dong, Danning Xu, Jing Li College of Veterinary Medicine, NorthEast Agricultural University, Harbin,Heilongjiang Province, P. R. China, 150030 Corresponding author, Address: College of Veterinary Medicine, North

  13. Optical Wireless Communications: System Model, Capacity Li (Tiffany) Murat Uysal

    E-print Network

    Li, Tiffany Jing

    long­distance optical wireless communication intensity modulation detection. channel under atmospheric to the capacity through­ under (relatively) strong turbulence. SYSTEM MODEL Long­distance Optical Wireless Systems Using IM/DD outdoor long­distance optical wireless system consists three parts: transmitter, propagation

  14. Event storm detection and identification in communication systems

    Microsoft Academic Search

    Mouayad Albaghdadi; Bruce Briley; Martha Evens

    2006-01-01

    Event storms are the manifestation of an important class of abnormal behaviors in communication systems. They occur when a large number of nodes throughout the system generate a set of events within a small period of time. It is essential for network management systems to detect every event storm and identify its cause, in order to prevent and repair potential

  15. Human Neural Systems for Face Recognition and Social Communication

    E-print Network

    Bucci, David J.

    Human Neural Systems for Face Recognition and Social Communication James V. Haxby, Elizabeth A a dissociation between neural systems that mediate face and object recognition. The lesions that cause. Hoffman, and M. Ida Gobbini Face perception is mediated by a distributed neural system in humans

  16. Dependability of Communications in Critical Real-Time Control Systems

    Microsoft Academic Search

    Anis Youssef; Agnan de Bonneval; Yves Crouzet

    2001-01-01

    With the increasing interest in Micro-Electro-Mechanical Systems (MEMS) it is likely that they will be massively deployed in future control systems. Their use raises many new chal- lenges: generic ones and more specific ones depending on the field of application. Considering control systems made of calculators and passive components (actuators and sensors), we have started investigating dependable communication allowing to

  17. Modular Interconnection System for Optical PCB and Backplane Communication

    Microsoft Academic Search

    Sacki Agelis; Sofia Jacobsson; Magnus Jonsson; Arne Alping; Per Ligander

    2002-01-01

    This paper presents a way of building modular systems with a powerful optical interconnection network. Each module, placed on a Printed Circuit Board (PCB), has a generic optical communication interface with a simple electronic router. Together with optical switching using micro-electromechanical system (MEMS) technology, packet switching over reconfigurable topologies is possible. The interconnection system gives the possibility to integrate electronics

  18. Communicating with Virtual Humans.

    ERIC Educational Resources Information Center

    Thalmann, Nadia Magnenat

    The face is a small part of a human, but it plays an essential role in communication. An open hybrid system for facial animation is presented. It encapsulates a considerable amount of information regarding facial models, movements, expressions, emotions, and speech. The complex description of facial animation can be handled better by assigning…

  19. Use of low orbital satellite communications systems for humanitarian programs

    NASA Technical Reports Server (NTRS)

    Vlasov, Vladimir N.; Gorkovoy, Vladimir

    1991-01-01

    Communication and information exchange play a decisive role in progress and social development. However, in many parts of the world the communication infrastructure is inadequate and the capacity for on-line exchange of information may not exist. This is true of underdeveloped countries, remote and relatively inaccessible regions, sites of natural disasters, and of all cases where the resources needed to create complex communication systems are limited. The creation of an inexpensive space communications system to service such areas is therefore a high priority task. In addition to a relatively low-cost space segment, an inexpensive space communications systems requires a large number of ground terminals, which must be relatively inexpensive, energy efficient (using power generated by storage batteries, or solar arrays, etc.), small in size, and must not require highly expert maintenance. The ground terminals must be portable, and readily deployable. Communications satellites in geostationary orbit at altitudes of about 36,000 km are very expensive and require complex and expensive ground stations and launch vehicles. Given current technology, it is categorically impossible to develop inexpensive satellite systems with portable ground terminals using such satellites. To solve the problem of developing an inexpensive satellite communications system that can operate with relatively small ground stations, including portable terminals, we propose to use a system with satellites in low Earth orbit, at an altitude of 900-1500 km. Because low orbital satellites are much closer to the Earth than geostationary ones and require vastly less energy expenditure by the satellite and ground terminals for transmission of messages, a system using them is relatively inexpensive. Such a system could use portable ground terminals no more complex than ordinary mobile police radios.

  20. Central projections of sensory systems involved in honey bee dance language communication.

    PubMed

    Brockmann, Axel; Robinson, Gene E

    2007-01-01

    Honey bee dance language is a unique and complex form of animal communication used to inform nest mates in the colony about the specific location of food sources or new nest sites. Five different sensory systems have been implicated in acquiring and communicating the information necessary for dance language communication. We present results from neuronal tracer studies identifying the central projections from four of the five. Sensory neurons of the dorsal rim area of the compound eyes, involved in acquiring sun-compass based information, project to the dorsal-most part of the medulla. Sensory neurons of the neck hair plates, required to transpose sun-compass based information to gravity-based information in the dark hive, project to the dorsal labial neuromere of the subesophageal ganglion. Sensory neurons from the antennal joint hair sensilla and the Johnston's organ, which perceive information on dance direction and distance from mechanostimuli generated by abdomen waggling and wing vibration, project to the deutocerebral dorsal lobe and the subesophageal ganglion, and the posterior protocerebrum, respectively. We found no 'dance-specific' projections relative to those previously described for drone and queen honey bees and other insect species that do not exhibit dance communication. We suggest that the evolution of dance language communication was likely based on the modification of central neural pathways associated with path integration, the capability to calculate distance, and directional information during flight. PMID:17519525

  1. A Joint Power and Subchannel Allocation Scheme Maximizing System Capacity in Indoor Dense Mobile Communication Systems

    Microsoft Academic Search

    Juyeop Kim; Dong-Ho Cho

    2010-01-01

    Indoor mobile communication systems (or simply indoor systems) are expected to yield significant improvement of capacity and coverage at low cost on mobile communication systems. However, the indoor system will likely be in dense environments, in which many cells exist in a small region, and a great portion of the coverage of a cell is overlapped by that of other

  2. HandMove: a system for creating animated user interface components by direct manipulation

    Microsoft Academic Search

    Dan Vodislav

    1995-01-01

    We describe HandMove (Human ANimation by Direct Manipulation of Objects and VisualElements), a highly interactive system for building animated scenes by direct manipulation. Itsunderlying model is based on concurrent evolution of graphical objects, position and attributeconstraints, trajectory-based motion, event synchronization. Animation may be produced bytime signals, user input or application values. Our objective is twofold: first, to present ananimation model

  3. A dual RF resonator system for high-field functional magnetic resonance imaging of small animals

    Microsoft Academic Search

    R. Ludwig; G. Bodgdanov; J. King; A. Allard; C. F. Ferris

    2004-01-01

    A new apparatus has been developed that integrates an animal restrainer arrangement for small animals with an actively tunable\\/detunable dual radio-frequency (RF) coil system for in vivo anatomical and functional magnetic resonance imaging of small animals at 4.7T. The radio-frequency coil features an eight-element microstrip line configuration that, in conjunction with a segmented outer copper shield, forms a transversal electromagnetic

  4. Study of vulnerability of electronic communication systems to electronic interception, volume 1

    Microsoft Academic Search

    C. W. Sanders; G. F. Sandy; J. F. Sawyer; A. Schneider

    1977-01-01

    The vulnerability of commonly available electronic communications to unauthorized interception was investigated. Common and specialized carrier and privately owned communications systems were studied. Various forms of communication such as analog and digital communications carried by dedicated service and switched service systems were analyzed. The transmission modes considered were terrestrial and satellite microwave systems, mobile radio systems and wire and cable

  5. A Seamless Handoff Scheme for Train-Ground Communication Systems in CBTC

    Microsoft Academic Search

    Li Zhu; F. Richard Yu; Bing Ning

    2010-01-01

    Communication-based train control (CBTC) system is an automated control system for railways that ensures the safe operation of rail vehicles using wireless data communications. The train-ground communication system is one of the key subsystem of CBTC. CBTC systems have stringent requirements for wireless communication availability and latency. In this paper, we propose a seamless handoff scheme based on stream control

  6. Integrated source and channel encoded digital communications system design study

    NASA Technical Reports Server (NTRS)

    Huth, G. K.

    1974-01-01

    Studies on the digital communication system for the direct communication links from ground to space shuttle and the links involving the Tracking and Data Relay Satellite (TDRS). Three main tasks were performed:(1) Channel encoding/decoding parameter optimization for forward and reverse TDRS links,(2)integration of command encoding/decoding and channel encoding/decoding; and (3) modulation coding interface study. The general communication environment is presented to provide the necessary background for the tasks and to provide an understanding of the implications of the results of the studies.

  7. Pose measurement and tracking system for motion-correction of unrestrained small animal PET\\/SPECT imaging

    Microsoft Academic Search

    J. S. Goddard; S. S. Gleason; M. J. Paulus; R. Kerekes; S. Majewski; V. Popov; M. Smith; A. Weisenberger; B. Welch; R. Wojcik

    2003-01-01

    An optical landmark-based pose measurement and tracking system is under development to provide in-scan animal position data for a new SPECT imaging system for unrestrained laboratory animals. The animal position and orientation data provides motion correction during image reconstruction. This paper describes new developments and progress using landmark markers placed on the animal along with strobed infrared lighting with improvements

  8. Satellite communications systems and technology. Volume 2: Site reports

    NASA Technical Reports Server (NTRS)

    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

    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.

  9. A detailed MPI communication model for distributed systems

    Microsoft Academic Search

    Thuy T. Le; Jalel Rejeb

    2006-01-01

    Message Passing Interface (MPI) is the most popular communication interface used in today PC clusters and other cluster-type parallel\\/distributed computers. Up-to-date the most popular analytical MPI communication performance model for parallel\\/distributed machines is the LogGP model, which is mostly based on system hardware parameters. Due to the popularity of MPI, the improvements of connection network in the past few years,

  10. Passive optical fast frequency-hop CDMA communications system

    Microsoft Academic Search

    Habib Fathallah; Leslie A. Rusch; Sophie Larochelle

    1999-01-01

    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

  11. A new communication mechanism for enhanced embedded training system

    Microsoft Academic Search

    Kun Su Yoon; Han Sang Jo; Keugyeol Bang

    2009-01-01

    This paper proposes a new communication mechanism for enhanced embedded training system (ETS) using the embedded virtual avionics (EVA). In the proposed mechanism, EVA card is a point-to-point TCP\\/IP communication directly interfaced with mission computer (MC) not via MIL-STD 1553B card. To support real-time embedded training (ET), data messages such as air-to-air, air-to-ground weapons and targets are integrated. The test

  12. Real-time communication for distributed plasma control systems

    Microsoft Academic Search

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

    2008-01-01

    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

  13. Animated Historical Cancer Atlas - Geographic Information Systems & Science

    Cancer.gov

    Users may select to display a map of the continental U.S. or an individual state. This option is provided to focus attention on one specific state during animation. The data and Color-Groups are the same for a state, whether it is shown individually or as part of the entire United States. Alaska and Hawaii are not included in this atlas because the spatial data smoothing method employed is more reliable on contiguous areas.

  14. A resistive heating system for homeothermic maintenance in small animals

    PubMed Central

    Kersemans, Veerle; Gilchrist, Stuart; Allen, Philip D.; Beech, John S.; Kinchesh, Paul; Vojnovic, Borivoj; Smart, Sean C.

    2015-01-01

    Purpose To develop an MR-compatible resistive heater for temperature maintenance of anaesthetized animals. Materials and Methods An MR-compatible resistive electrical heater was formed from a tightly-wound twisted pair wire, interfaced to a homeothermic maintenance controller. Fat-suppressed images and localized spectra were acquired with the twisted pair heater and a near-identical single strand heater during operation at maximum power. Data were also acquired in the absence of heating to demonstrate the insensitivity of MR to distortions arising from the passage of current through the heater elements. The efficacy of temperature maintenance was examined by measuring rectal temperature immediately following induction of general anesthesia and throughout and after the acquisition of a heater artifact-prone image series. Results Images and spectra acquired in the presence and absence of DC current through the twisted pair heater were identical whereas the passage of current through the single strand wire created field shifts and lineshape distortions. Temperature that is lost during anesthesia induction was recovered within approximately 10–20 minutes of induction, and a stable temperature is reached as the animal's temperature approaches the set target. Conclusion The twisted pair wire heater does not interfere with MR image quality and maintains adequate thermal input to the animal to maintain body temperature. PMID:25863135

  15. New laser communication and laser ranging of integration source system

    NASA Astrophysics Data System (ADS)

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

    2014-12-01

    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.

  16. MOAB: a spatially explicit, individual-based expert system for creating animal foraging models

    USGS Publications Warehouse

    Carter, J.; Finn, John T.

    1999-01-01

    We describe the development, structure, and corroboration process of a simulation model of animal behavior (MOAB). MOAB can create spatially explicit, individual-based animal foraging models. Users can create or replicate heterogeneous landscape patterns, and place resources and individual animals of a goven species on that landscape to simultaneously simulate the foraging behavior of multiple species. The heuristic rules for animal behavior are maintained in a user-modifiable expert system. MOAB can be used to explore hypotheses concerning the influence of landscape patttern on animal movement and foraging behavior. A red fox (Vulpes vulpes L.) foraging and nest predation model was created to test MOAB's capabilities. Foxes were simulated for 30-day periods using both expert system and random movement rules. Home range size, territory formation and other available simulation studies. A striped skunk (Mephitis mephitis L.) model also was developed. The expert system model proved superior to stochastic in respect to territory formation, general movement patterns and home range size.

  17. Rodent Scope: A User-Configurable Digital Wireless Telemetry System for Freely Behaving Animals

    PubMed Central

    Ball, David; Kliese, Russell; Windels, Francois; Nolan, Christopher; Stratton, Peter; Sah, Pankaj; Wiles, Janet

    2014-01-01

    This paper describes the design and implementation of a wireless neural telemetry system that enables new experimental paradigms, such as neural recordings during rodent navigation in large outdoor environments. RoSco, short for Rodent Scope, is a small lightweight user-configurable module suitable for digital wireless recording from freely behaving small animals. Due to the digital transmission technology, RoSco has advantages over most other wireless modules of noise immunity and online user-configurable settings. RoSco digitally transmits entire neural waveforms for 14 of 16 channels at 20 kHz with 8-bit encoding which are streamed to the PC as standard USB audio packets. Up to 31 RoSco wireless modules can coexist in the same environment on non-overlapping independent channels. The design has spatial diversity reception via two antennas, which makes wireless communication resilient to fading and obstacles. In comparison with most existing wireless systems, this system has online user-selectable independent gain control of each channel in 8 factors from 500 to 32,000 times, two selectable ground references from a subset of channels, selectable channel grounding to disable noisy electrodes, and selectable bandwidth suitable for action potentials (300 Hz–3 kHz) and low frequency field potentials (4 Hz–3 kHz). Indoor and outdoor recordings taken from freely behaving rodents are shown to be comparable to a commercial wired system in sorting for neural populations. The module has low input referred noise, battery life of 1.5 hours and transmission losses of 0.1% up to a range of 10 m. PMID:24587144

  18. 5 Traditional Communication Architectures Existing multiprocessor systems do not provide a communication architecture in the sense that they do

    E-print Network

    von Eicken, Thorsten

    107 5 Traditional Communication Architectures Existing multiprocessor systems do not provide a communication architecture in the sense that they do not offer a well-defined layer of abstraction to which-defined low-level communication "layer" which is considered to be "close to the hardware" (or implemented

  19. Personalized Unit Selection for an Image-based Facial Animation System

    Microsoft Academic Search

    A. Weissenfeld; Kang Liu; S. Klomp; J. Ostermann

    2005-01-01

    This paper describes an image-based facial animation system, which consists of the audiovisual analysis of a human subject and the synthesis of a photo-realistic facial animation. The unit selection algorithm selects for a given audio output the best mouth samples from the database by assigning two costs, the phonetic context and the visual distance between two consecutive samples. Here a

  20. Systems Biology in Animal Breeding: Identifying relationships among markers, genes, and phenotypes

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The Breeding and Genetics Symposium titled “Systems Biology in Animal Breeding: Identifying relationships among markers, genes, and phenotypes” was held at the Joint Annual Meeting of the American Dairy Science Association and the American Society of Animal Science in Phoenix, AZ, July 15 to 19, 201...

  1. A logic programming based specification animation tool for real-time systems

    Microsoft Academic Search

    S. Mitra; G. Bhattacharyya; T. K. Ghoshal; K. Datta; R. Sengupta

    1989-01-01

    During the elicitation and verification of the specification for real-time control systems, the sequential-temporal aspects need to be treated separately. These aspects also require animation for verification and incremental refinement of the specification. An automated tool kit can be used to mechanize animation of specification. An augmented Petri net modeling tool is adopted to capture the logical, sequential and timing

  2. COMMUNITY-BASED ANIMAL HEALTH DELIVERY SYSTEMS: IMPROVING THE QUALITY OF VETERINARY SERVICE DELIVERY

    Microsoft Academic Search

    Tim Leyland; Andy Catley

    This paper aims to give a brief introduction to community-based animal health workers (CAHW). It will refer the reader to sources of more detailed information not only on the modalities of establishing quality community-based animal health worker delivery systems but also on those CAHW issues that veterinary policy makers should appreciate in order to make rational decisions on improving the

  3. LOTUS 1-2-3-BASED SYSTEM FOR RECORDING AND MAINTAINING BODY WEIGHT OF LABORATORY ANIMALS

    EPA Science Inventory

    Body weight maintenance is required in a variety of behavioral and physiological studies. C-based animal weighing system is described which features automated data collection and allows for accurate control of body weight in test animals via manipulation of food intake. ajor syst...

  4. 77 FR 6000 - Airworthiness Directives; Aviation Communication & Surveillance Systems (ACSS) Traffic Alert and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-07

    ...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...

  5. Improving Literacy Skills in Students with Complex Communication Needs Who Use Augmentative/Alternative Communication Systems

    ERIC Educational Resources Information Center

    Bailey, Rita L.; Angell, Maureen E.; Stoner, Julia B.

    2011-01-01

    A structured intervention package including direct, scaffolded, instructional lessons was implemented using an error correction learning system and a picture book-based phonological and phonemic awareness activity for four participants with complex communication needs, ranging from 12 to 15 years, in a junior high school setting. Although…

  6. Traditional Animation Keyframe Animation

    E-print Network

    Treuille, Adrien

    #12;Traditional Animation: The Process · Story board ­ Sequence of drawings with descriptions ­ Story board ­ Animatic ­ Final Animation #12;Traditional Animation: The Process · Key Frames ­ Draw a fewAnimation Traditional Animation Keyframe Animation Interpolating Rotation Forward

  7. A Maintenance System Based on Near Field Communication

    Microsoft Academic Search

    Stephan Karpischek; Florian Michahelles; Albrecht Bereuter; Elgar Fleisch

    2009-01-01

    Maintenance of critical emergency infrastructure is potentially lifesaving, but also expensive and tedious to document and track. In this paper we demonstrate a maintenance system based on Near Field Communication (NFC). NFC-enabled mobile phones and NFC tags are used to improve recurring maintenance processes: the maintenance task itself becomes more efficient; and the system facilitates real-time documentation, central process control

  8. A System Perspective on Cognition for Autonomic Computing and Communication

    Microsoft Academic Search

    Arjan J. H. Peddemors; Ignas G. Niemegeers; Henk Eertink; Johan De Heer

    2005-01-01

    In this paper we present a conceptual view on the incorporation of cognitive processing capabilities in future generation computer systems. We argue that cognition is at the heart of autonomic behavior, and therefore a necessary ingredient for autonomic computing and communication. We introduce a bio- inspired cognitive engine that interacts with and has control over major operating system components, and

  9. MOST network system supporting full-duplexing communication

    Microsoft Academic Search

    Sang-Yub Lee; Sang-Hyun Park; Hyo-Sub Choi; Chul Dong Lee

    2012-01-01

    Increasing network reliability and reducing the fault tolerance of Media Oriented System Transport (MOST) network which has been adopted by major car maker such as BMW, AUDI, as in-vehicle backbone network has to be employed the full duplexing configuration. In this paper, proposed MOST network system is applied to two communication ports which enable to provide redundant path. Thus proposed

  10. Channel simulation for direct detection optical communication systems

    NASA Technical Reports Server (NTRS)

    Tycz, M.; Fitzmaurice, M. W.

    1974-01-01

    A technique is described for simulating the random modulation imposed by atmospheric scintillation and transmitter pointing jitter on a direct detection optical communication system. The system is capable of providing signal fading statistics which obey log normal, beta, Rayleigh, Ricean or chi-squared density functions. Experimental tests of the performance of the Channel Simulator are presented.

  11. Influence of Interference in MIMO Power Line Communication systems

    E-print Network

    Brest, Université de

    ] suggested that the PLC capacity is increased by a factor of around 2 when a MIMO technique is used. Firstly simulation results for SINR and capacity in MIMO-PLC systems. In particular, we study the impact1 Influence of Interference in MIMO Power Line Communication systems Thanh Nhan VO1, Karine AMIS1

  12. An overview of limited feedback in wireless communication systems

    Microsoft Academic Search

    David James Love; Robert W. Heath Jr.; Vincent K. N. Lau; David Gesbert; Bhaskar D. Rao; Matthew Andrews

    2008-01-01

    It is now well known that employing channel adaptive signaling in wireless communication systems can yield large improvements in almost any performance metric. Unfortunately, many kinds of channel adaptive techniques have been deemed impractical in the past because of the problem of obtaining channel knowledge at the transmitter. The transmitter in many systems (such as those using frequency division duplexing)

  13. Advanced laser diode structures for space communication systems

    Microsoft Academic Search

    D. L. Begley; D. K. Wagner; D. S. Hill

    1987-01-01

    Single quantum well (SQW) lasers have recently been shown to offer superior performance compared with conventional double heterostructures. These devices have demonstrated very low threshold current densities, high efficiency, and high output powers. The application of SQW laser diodes to free-space laser communication systems is expected to have significant impact on total system performance and increase the utility and viability

  14. Short communication Hedgehog structure in nematic and magnetic systems

    E-print Network

    Paris-Sud XI, Université de

    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

  15. Spread spectrum synchronization for a LEO personal communications satellite system

    Microsoft Academic Search

    D. E. Dodds; M. Moher

    1995-01-01

    This paper investigates required signal structure and receiver code synchronization techniques for satellite based CDMA personal communications systems. A signal structure is proposed in which different CDMA codes are used to differentiate each satellite (as in the GPS system) and different phases of one code (as in the IS-95 standard) to differentiate spot beams on one satellite. Due to satellite

  16. Computer-Aided Communication Satellite System Analysis and Optimization.

    ERIC Educational Resources Information Center

    Stagl, Thomas W.; And Others

    Various published computer programs for fixed/broadcast communication satellite system synthesis and optimization are discussed. The rationale for selecting General Dynamics/Convair's Satellite Telecommunication Analysis and Modeling Program (STAMP) in modified form to aid in the system costing and sensitivity analysis work in the Program on…

  17. Channel simulation for direct-detection optical communication systems

    NASA Technical Reports Server (NTRS)

    Tycz, M.; Fitzmaurice, M. W.

    1974-01-01

    A technique is described for simulating the random modulation imposed by atmospheric scintillation and transmitter pointing jitter on a direct-detection optical communication system. The system is capable of providing signal fading statistics which obey log-normal, beta, Rayleigh, Ricean, or chi-square density functions. Experimental tests of the performance of the channel simulator are presented.

  18. Overview of a wideband communications EMC analysis system

    NASA Astrophysics Data System (ADS)

    Lustgarten, M. N.; Maiuzzo, M. A.; Rockway, J. W.; Li, S. T.

    This paper outlines the previously unpublished portion of a topside EMC analysis program applicable to a wideband HF communications system. That portion consists of procedures for predicting antenna-to-antenna coupling loss (including mismatch effects) and nonlinear effects in the preamplifier, associated with the receiving antenna and in receiving system multicouplers.

  19. Analysis of submarine cable and communication satellite systems reliabilities

    Microsoft Academic Search

    G. S. Li

    1977-01-01

    The performance of AT&T's overseas message telephone circuits for the years 1970-1975 was the basis for ana analysis of the reliability of submarine cables and communication satellite systems. Data presented in 24 tables is devided into three categories: (1) over cable and satellite system outage statistics for each of the six years and the six year average, (2) detailed cable

  20. MULTIUSER DETECTION FOR COHERENT OPTICAL CDMA COMMUNICATION SYSTEMS

    E-print Network

    Brandt-Pearce, Maite

    , 7]. Also, a formulation of the optimal multiuser detector for a coherent optical system has beenMULTIUSER DETECTION FOR COHERENT OPTICAL CDMA COMMUNICATION SYSTEMS MaË? �tâ?? e Brandt­Pearce Department of Electrical Engineering University of Virginia, Charlottesville, VA 22903 Abstract Optical