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Sample records for packet radio service

  1. Packet Radio Communications Project

    DTIC Science & Technology

    1974-12-01

    init.ate any pending DMA channel I/O now possible as a result of the completed DMA I/O operation. For example, if the packet transmision has been...keyboard and printer b. Binary data record I/O fo/from the tape media c. Scan for unsolicited keyboard input 2-12 Software description of experimental...the station and transmit to the station packets input on the radio receivers. The goal is to provide a transparent packet transfer media to

  2. Packet Radio for Library Automation.

    ERIC Educational Resources Information Center

    Brownrigg, Edwin B.; And Others

    1984-01-01

    This tutorial on packet radio (communication system using radio and digital packet-switching technology) highlights radio transmission of data, brief history, special considerations in applying packet radio to library online catalogs, technology, defining protocol at physical and network levels, security, geographic coverage, and components. (A…

  3. Packet Radio: An Alternative Way to Connect.

    ERIC Educational Resources Information Center

    Lucas, Larry W.

    1995-01-01

    Explains packet radio as a form of telecomputing in which digital data is transported via radio waves instead of telephone lines or other cabling, and describes how it can be used by students to access the Internet. Highlights include packet bulletin board systems and equipment needed for a packet radio station. (LRW)

  4. Coding for spread spectrum packet radios

    NASA Technical Reports Server (NTRS)

    Omura, J. K.

    1980-01-01

    Packet radios are often expected to operate in a radio communication network environment where there tends to be man made interference signals. To combat such interference, spread spectrum waveforms are being considered for some applications. The use of convolutional coding with Viterbi decoding to further improve the performance of spread spectrum packet radios is examined. At 0.00001 bit error rates, improvements in performance of 4 db to 5 db can easily be achieved with such coding without any change in data rate nor spread spectrum bandwidth. This coding gain is more dramatic in an interference environment.

  5. Measurement and Evaluation Studies of Packet Radio Telecommunications Systems

    DTIC Science & Technology

    2014-01-07

    and to perform, evaluation of Packet Radio Network In support of the evolution of packet radio technology . The (continued) DD ,: FORM AN 71 1473...by the PRNET investi- gation efforts in support of the continuing evolution of packet radio technology . The reliance on simulation and measurement...potentials of such technology . The PRNET Project has involved the efforts of a number of contracting institution. As one of the major participants, this

  6. Continuing Development of California State Packet Radio Project.

    ERIC Educational Resources Information Center

    Brownrigg, Edwin

    1992-01-01

    Provides background on the California State Library Packet Radio project, which will use packet radios to deploy a wireless, high-speed, wide-area network of 600 nodes, including 100 libraries, in the San Francisco Bay Area. Project goals and objectives, plan of operation, equipment, and evaluation plans are summarized. (MES)

  7. Experimental Packet Radio System Design Plan

    DTIC Science & Technology

    1974-03-13

    series of step functions. Rather, it must be viewed as having an irregular shape. The situation at any particular point in time ’ s determined by...it waits a sufficient time to allow devices tudt receive the packet to repeat It. When any of these repeats the packet and the packet is...keeping heat input to any or all burners at a safe level at all times . CLEAN Complete, flameless combustion of the gas results in no soot formation, no

  8. Radio's Changing Environment. Info. Packets No. 22.

    ERIC Educational Resources Information Center

    Bailey, George

    The purpose of this report is to identify changes in the radio environment, especially those which affect public radio's ability to compete. In Boston and other markets around the country, most formats have subdivided into targeted niches. The effect has been to even out station shares, so that rather than trying to reach mass audiences,…

  9. DBS Radio: Deathstar or Dud? Info. Packets No. 24.

    ERIC Educational Resources Information Center

    Pizzi, Skip

    The Federal Communications Commission (FCC) has been progressing over the past 5 years toward the institution of Direct Broadcast Satellite Radio (DBS-R) which would institute a new type of radio service. The FCC refers to the service as Satellite DARS (Digital Audio Radio Service), and it would provide reliable, high-fidelity satellite-delivered…

  10. A Practical Terrestrial Packet Radio Network.

    DTIC Science & Technology

    1983-11-01

    tested during a 1977 demonstration. The prototype network, made up of ZPRs operated both fixed and mobile radios. After only two years of daily...the error detec- tion and retransmission techniques used in ZPR ) --Slotted and nonslotted transmission capability --Reception of two successive

  11. Radio determination satellite service

    NASA Astrophysics Data System (ADS)

    Briskman, Robert D.

    1990-07-01

    The capabilities and measured performance of a geosynchronous satellite-based service called the radio determination satellite service (RDSS), which operates at radio frequencies allocated by the International Telecommunications Union (ITU) and is licensed in the United States by the Federal Communications Commission (FCC), are discussed. Plans for both improvement in capability and expansion to nearly global coverage are described. Since RDSS can also provide radio navigation, some comparisons of this service with the Global Positioning System (GPS) are made.

  12. Simulation of satellite-supported packet radio networks in the laboratory - Modular experimental system simplifies the design of packet radio networks for land-mobile applications

    NASA Astrophysics Data System (ADS)

    Boettcher, Axel; Dippold, Michael; Jahn, Axel; Schaefer, Wolfgang

    1992-05-01

    A modular simulation system with hardware and software components is described which can be used for planning and testing land-mobile packet radio data networks. The system is shown to be simple, robust, and suitable for inner city environment.

  13. Wide-band packet radio for multipath environments

    NASA Astrophysics Data System (ADS)

    Fischer, Jeffrey H.; Cafarella, John H.; Bouman, Charles A.; Flynn, Gerard T.; Dolat, Victor S.

    1988-05-01

    A direct-sequence spread-spectrum packet radio is described that has versatile signal-processing and local-control capabilities designed to support the functions required of a robust mobile communications network. Noteworthy capabilities include eleven selectable data rates with accurate range measurements in a fading multipath channel. The radio uses a hybrid analog/digital signal processor and nonrepeating spreading codes for suppression of intersymbol interference and jamming. It incorporates two sets of monolithic surface-acoustic-wave convolvers as programmable matched filters with time-bandwidth products of 64 and 2000. The analog matched filters are coupled with binary postprocessing for the functions of detection, RAKE demodulation, and ranging measurements over a wide multipath spread. The data rate can be varied in response to channel conditions from 1.45 Mb/s down to 44 b/s with an almost ideal tradeoff in signal-processing gain from 18 dB up to 61 dB prior to multipath combining.

  14. Quality of service in optical packet switched DWDM transport networks

    NASA Astrophysics Data System (ADS)

    Bjornstad, Steinar; Stol, Norvald; Hjelme, Dag R.

    2002-09-01

    For support of multimedia applications in Internet, at least four service classes are normally outlined. We expect optical packet switching to be of special interest in terabit capacity networks with a high number of wavelengths. Our analysis shows that when the wavelength dimension is used for contention resolution, and number of wavelengths is 32 or higher, node-delay is negligible. However buffering in optical packet switches is a scarce resource which use should be minimized. Based on the requirement of the future network, and on our packet switch performance analysis, we suggest reducing the number of service classes to two: A normal class (NCT) with medium low packet loss and a low need for buffering, and a high class (HCT) with a minimum of packet loss. Performance of a buffer reservation scheme is analyzed by simulation. Assuming the network of today with 10 % HCT traffic, assigning four buffer inputs to the HCT traffic, a difference in optical packet loss ratio of three orders of magnitude can be obtained. The same difference in optical packet loss ratio can be obtained if 50 % HCT traffic is assumed (network of tomorrow), by assigning a higher number of buffer inputs.

  15. Safety and Special Radio Services.

    ERIC Educational Resources Information Center

    Federal Communications Commission, Washington, DC.

    Numerous radio stations across the nation perform nonbroadcast services in areas ranging from aviation, forestry protection, and telephone maintenance to amateur and citizen radio. These services can be grouped in four general categories: (1) safety, (2) industry, (3) land transportation, and (4) miscellaneous purposes. This bulletin briefly…

  16. Collision Avoidance Techniques for Packet-Radio Networks

    DTIC Science & Technology

    1998-06-01

    results for various con gurations . . . . . . . . . . . . . . . . . 114 4.2 Throughput comprison of FAMA-NCS, IEEE 802.11 and MACAW . . . . . 116 5.1...Kar90] and its modi ed version MACAW (MACA for Wireless) [BDSZ94] were proposed to operate with hidden terminal using a simple three-way dialogue...interference free packets, and does not detect any other type of activity on the channel). However, the performance of MACA and MACAW degrade to

  17. Radio-Parameter Selection Algorithm for Receiver-Directed Packet-Radio Networks (SRNTN-73)

    DTIC Science & Technology

    1990-01-01

    errors are overcome to some extent by the interleaving capabilities of the LPRs operating in FEC mode . FEC In the SURAP environment a link implements FEC...blocking or channel noise. In contention situations the appropriate action is to minimize packet overlap at the transceiver, and to minimize transmission...receiving node and/or the packet overhead due to coding and channel bit rate. In the second situation the appropriate action is to increase channel gain

  18. Bispectral Analysis of a Langmuir Wave Packet Associated with a Solar Type III Radio Burst

    NASA Astrophysics Data System (ADS)

    Golla, T.; MacDowall, R. J.; Bergamo, M.

    2012-12-01

    We present the observations of an intense localized wave packet, obtained by the STEREO spacecraft in the source region of a solar type III radio burst. The FFT spectrum of this wave packet contains a primary peak at the local electron plasma frequency, fpe (Langmuir waves), and two secondary peaks, one at 2fpe (second harmonic) and a second one at 3fpe (third harmonic). The wavelet based time-frequency spectrogram indicates that these spectral peaks are coincident in time. It is found that the bicoherence spectrum, computed using the wavelet based bispectral analysis technique contains two peaks, one at (fpe, fpe) and a second one at (2fpe, fpe). The high values of the bicoherences of these spectral peaks, which quantify the phase coherences amongst the harmonic components provide unambiguous evidence for the three wave interactions L + L' -> T2f{pe}, and L + T2f{pe} -> T3f{pe} in the waveform data, where L and L' are the oppositely propagating Langmuir waves, and T2f{pe} and T3f{pe} are the second and third harmonic electromagnetic waves, respectively. The peak intensity and short duration of this wave packet, which indicate that it is probably a collapsing soliton formed as a result of oscillating two stream instability (OTSI), strongly suggest that the L and L' probably correspond to the OTSI excited oppositely propagating Langmuir waves.

  19. Observational evidence for the collapsing Langmuir wave packet in a solar type III radio burst

    NASA Astrophysics Data System (ADS)

    Thejappa, G.; MacDowall, R. J.; Bergamo, M.

    2013-07-01

    High time resolution observations from the STEREO spacecraft show that in solar type III radio bursts, Langmuir waves often occur as very intense one-dimensional magnetic field aligned field structures. One of these events represents the most intense Langmuir wave packet with WLneTe~7.2×10-3 ever detected in a type III radio burst until now (WL is the peak energy density, and ne and Te are the electron density and temperature, respectively). The detailed analysis of this wave packet indicates that (1) its peak intensity is well above the threshold for the oscillating two-stream instability (OTSI) and supersonic collapse; (2) its peak intensity and spatial scale satisfy the criterion for it to be a collapsing envelope soliton; (3) its low-frequency components provide evidence for a density cavity, whose depth, width, and temporal coincidence indicate that probably it is the ponderomotive force generated density cavity; and (4) its spectrum contains harmonic peaks at 2fpe and 3fpe (in addition to the main Langmuir wave peak at the electron plasma frequency, fpe), which, as indicated by the bispectral analysis, probably are of the electromagnetic waves generated as a result of coalescence of two oppositely propagating Langmuir waves, and a Langmuir wave and a second harmonic electromagnetic wave, respectively. These characteristics strongly suggest that this wave packet and its associated density cavity represent the collapsing envelope soliton-caviton pair formed as a result of OTSI, and in the present case, the strong turbulence processes probably play key roles in the beam stabilization as well as conversion of Langmuir waves into escaping radiation at 2fpe and 3fpe.

  20. Fast packet switch architectures for broadband integrated services digital networks

    NASA Technical Reports Server (NTRS)

    Tobagi, Fouad A.

    1990-01-01

    Background information on networking and switching is provided, and the various architectures that have been considered for fast packet switches are described. The focus is solely on switches designed to be implemented electronically. A set of definitions and a brief description of the functionality required of fast packet switches are given. Three basic types of packet switches are identified: the shared-memory, shared-medium, and space-division types. Each of these is described, and examples are given.

  1. Spatial Reuse through Dynamic Power and Routing Control in Common-Channel Random-Access Packet Radio Networks

    DTIC Science & Technology

    1988-08-01

    environment and the thoughtful discussions about packet radio networks. In addition, many thoughtful comments were provided by Mel Bebee , Dr. Ray Bittel, and...the AT&T Network IEEE International Conference on Communications (ICC), June 1987, pages 19B.5.1-19B.5.7 Bebee88 Mel Bebee Personal Communications

  2. Non-intrusive Packet-Layer Model for Monitoring Video Quality of IPTV Services

    NASA Astrophysics Data System (ADS)

    Yamagishi, Kazuhisa; Hayashi, Takanori

    Developing a non-intrusive packet-layer model is required to passively monitor the quality of experience (QoE) during service. We propose a packet-layer model that can be used to estimate the video quality of IPTV using quality parameters derived from transmitted packet headers. The computational load of the model is lighter than that of the model that takes video signals and/or video-related bitstream information such as motion vectors as input. This model is applicable even if the transmitted bitstream information is encrypted because it uses transmitted packet headers rather than bitstream information. For developing the model, we conducted three extensive subjective quality assessments for different encoders and decoders (codecs), and video content. Then, we modeled the subjective video quality assessment characteristics based on objective features affected by coding and packet loss. Finally, we verified the model's validity by applying our model to unknown data sets different from training data sets used above.

  3. Radio and Television Servicing. Intermediate Course.

    ERIC Educational Resources Information Center

    Campbell, Guy; And Others

    Several intermediate performance objectives and corresponding criterion measures are listed for each of 32 terminal objectives for an intermediate (second year) radio/TV servicing course. This 1-year course (3 hours daily) was designed to provide the student with the basic skills and knowledges necessary for entry level employment in the Radio/TV…

  4. 47 CFR 20.9 - Commercial mobile radio service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Commercial mobile radio service. 20.9 Section... COMMERCIAL MOBILE RADIO SERVICES § 20.9 Commercial mobile radio service. (a) The following mobile services shall be treated as common carriage services and regulated as commercial mobile radio...

  5. Experimental evaluation of the impact of packet capturing tools for web services.

    SciTech Connect

    Choe, Yung Ryn; Mohapatra, Prasant; Chuah, Chen-Nee; Chen, Chao-Chih

    2011-10-01

    Network measurement is a discipline that provides the techniques to collect data that are fundamental to many branches of computer science. While many capturing tools and comparisons have made available in the literature and elsewhere, the impact of these packet capturing tools on existing processes have not been thoroughly studied. While not a concern for collection methods in which dedicated servers are used, many usage scenarios of packet capturing now requires the packet capturing tool to run concurrently with operational processes. In this work we perform experimental evaluations of the performance impact that packet capturing process have on web-based services; in particular, we observe the impact on web servers. We find that packet capturing processes indeed impact the performance of web servers, but on a multi-core system the impact varies depending on whether the packet capturing and web hosting processes are co-located or not. In addition, the architecture and behavior of the web server and process scheduling is coupled with the behavior of the packet capturing process, which in turn also affect the web server's performance.

  6. 47 CFR 20.9 - Commercial mobile radio service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 2 2011-10-01 2011-10-01 false Commercial mobile radio service. 20.9 Section... COMMERCIAL MOBILE SERVICES § 20.9 Commercial mobile radio service. (a) The following mobile services shall be treated as common carriage services and regulated as commercial mobile radio services (including any...

  7. 47 CFR 20.9 - Commercial mobile radio service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Commercial mobile radio service. 20.9 Section... COMMERCIAL MOBILE SERVICES § 20.9 Commercial mobile radio service. (a) The following mobile services shall be treated as common carriage services and regulated as commercial mobile radio services (including any...

  8. 47 CFR 20.9 - Commercial mobile radio service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Commercial mobile radio service. 20.9 Section... COMMERCIAL MOBILE SERVICES § 20.9 Commercial mobile radio service. (a) The following mobile services shall be treated as common carriage services and regulated as commercial mobile radio services (including any...

  9. 47 CFR 20.9 - Commercial mobile radio service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 2 2012-10-01 2012-10-01 false Commercial mobile radio service. 20.9 Section... COMMERCIAL MOBILE SERVICES § 20.9 Commercial mobile radio service. (a) The following mobile services shall be treated as common carriage services and regulated as commercial mobile radio services (including any...

  10. 47 CFR 90.185 - Multiple licensing of radio transmitting equipment in the mobile radio service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Multiple licensing of radio transmitting equipment in the mobile radio service. 90.185 Section 90.185 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES...

  11. 47 CFR 90.185 - Multiple licensing of radio transmitting equipment in the mobile radio service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Multiple licensing of radio transmitting equipment in the mobile radio service. 90.185 Section 90.185 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES...

  12. 47 CFR 90.185 - Multiple licensing of radio transmitting equipment in the mobile radio service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Multiple licensing of radio transmitting equipment in the mobile radio service. 90.185 Section 90.185 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES...

  13. 47 CFR 90.185 - Multiple licensing of radio transmitting equipment in the mobile radio service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Multiple licensing of radio transmitting equipment in the mobile radio service. 90.185 Section 90.185 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES...

  14. 47 CFR 90.185 - Multiple licensing of radio transmitting equipment in the mobile radio service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Multiple licensing of radio transmitting equipment in the mobile radio service. 90.185 Section 90.185 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES...

  15. 47 CFR 97.407 - Radio amateur civil emergency service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Radio amateur civil emergency service. 97.407 Section 97.407 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AMATEUR RADIO SERVICE Providing Emergency Communications § 97.407 Radio amateur civil...

  16. 47 CFR 97.407 - Radio amateur civil emergency service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Radio amateur civil emergency service. 97.407 Section 97.407 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AMATEUR RADIO SERVICE Providing Emergency Communications § 97.407 Radio amateur civil...

  17. 47 CFR 97.407 - Radio amateur civil emergency service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Radio amateur civil emergency service. 97.407 Section 97.407 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AMATEUR RADIO SERVICE Providing Emergency Communications § 97.407 Radio amateur civil...

  18. 47 CFR 97.407 - Radio amateur civil emergency service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Radio amateur civil emergency service. 97.407 Section 97.407 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AMATEUR RADIO SERVICE Providing Emergency Communications § 97.407 Radio amateur civil...

  19. 47 CFR 97.407 - Radio amateur civil emergency service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Radio amateur civil emergency service. 97.407 Section 97.407 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES AMATEUR RADIO SERVICE Providing Emergency Communications § 97.407 Radio amateur civil...

  20. Parametric Packet-Layer Model for Evaluation Audio Quality in Multimedia Streaming Services

    NASA Astrophysics Data System (ADS)

    Egi, Noritsugu; Hayashi, Takanori; Takahashi, Akira

    We propose a parametric packet-layer model for monitoring audio quality in multimedia streaming services such as Internet protocol television (IPTV). This model estimates audio quality of experience (QoE) on the basis of quality degradation due to coding and packet loss of an audio sequence. The input parameters of this model are audio bit rate, sampling rate, frame length, packet-loss frequency, and average burst length. Audio bit rate, packet-loss frequency, and average burst length are calculated from header information in received IP packets. For sampling rate, frame length, and audio codec type, the values or the names used in monitored services are input into this model directly. We performed a subjective listening test to examine the relationships between these input parameters and perceived audio quality. The codec used in this test was the Advanced Audio Codec-Low Complexity (AAC-LC), which is one of the international standards for audio coding. On the basis of the test results, we developed an audio quality evaluation model. The verification results indicate that audio quality estimated by the proposed model has a high correlation with perceived audio quality.

  1. 77 FR 1661 - Private Land Mobile Radio Service Regulations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-11

    ... COMMISSION 47 CFR Part 90 Private Land Mobile Radio Service Regulations AGENCY: Federal Communications... affect small businesses that manufacture aviation radio equipment. The Commission has not developed a definition of small entities applicable to aviation radio equipment manufacturers. Therefore, the...

  2. 77 FR 32900 - Radio Broadcasting Services; Llano, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-04

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Llano, TX AGENCY: Federal Communications Commission... Congressional Review Act, see U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting...: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for part 73 continues to read as...

  3. 78 FR 266 - Radio Broadcasting Services; Maysville, GA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-03

    ...-270; RM-11676; DA 12-2024] Radio Broadcasting Services; Maysville, GA AGENCY: Federal Communications... Review Act, see 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting...: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for part 73 continues to read as...

  4. 77 FR 64946 - Radio Broadcasting Services; Maysville, Georgia

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-24

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Maysville, Georgia AGENCY: Federal Communications... Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio... proposes to amend 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 1. The authority...

  5. 75 FR 52649 - Radio Broadcasting Services; DeBeque, Colorado

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-27

    ... COMMISSION 47 CFR Part 73 . Radio Broadcasting Services; DeBeque, Colorado AGENCY: Federal Communications... Congressional Review Act, see 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio... follows: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for part 73 continues to read...

  6. 77 FR 59882 - Radio Broadcasting Services; Tignall, GA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-01

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Tignall, GA AGENCY: Federal Communications Commission... Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio... proposes to amend 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 1. The authority...

  7. 75 FR 63431 - Radio Broadcasting Services; Willow Creek, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-15

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Willow Creek, CA AGENCY: Federal Communications... 47 CFR Part 73 Radio, Radio broadcasting. For the reasons discussed in the preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 1....

  8. 76 FR 67397 - Radio Broadcasting Services; Llano, Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-01

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Llano, Texas AGENCY: Federal Communications Commission... 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant... Communications Commission proposes to amend 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 1....

  9. 78 FR 25591 - Radio Broadcasting Services; Crownpoint, New Mexico

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-02

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Crownpoint, New Mexico AGENCY: Federal Communications... Act, see U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR part 73 Radio, Radio broadcasting. Federal...--RADIO BROADCAST SERVICES 0 1. The authority citation for Part 73 continues to read as follows:...

  10. 78 FR 4078 - Radio Broadcasting Services; Hebbronville, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-18

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Hebbronville, TX AGENCY: Federal Communications... Review Act, see 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting...: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for part 73 continues to read as...

  11. 78 FR 26739 - Radio Broadcasting Services; Ehrenberg, Arizona

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-08

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Ehrenberg, Arizona AGENCY: Federal Communications... Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez... Communications Commission proposes to amend 47 CFR Part 73 as follows: PART 73--RADIO BROADCAST SERVICES 0 1....

  12. 78 FR 32 - Radio Broadcasting Services; Westley, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-02

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Westley, CA AGENCY: Federal Communications Commission.... 8. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission... Federal Communications Commission amends 47 CFR Part 73 as follows: PART 73--RADIO BROADCAST SERVICES 0...

  13. 78 FR 12622 - Radio Broadcasting Services; Greenup, IL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-25

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Greenup, IL AGENCY: Federal Communications Commission... a first and/or second NCE radio service to 67.5 percent (21,149 persons) of the total population of... 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. ]...

  14. 75 FR 76294 - Radio Broadcasting Services; Fairbanks, AK

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-08

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Fairbanks, AK AGENCY: Federal Communications... Review Act, see U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. 0 For... follows: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for Part 73 continues to read...

  15. 77 FR 50630 - Radio Broadcasting Services; Westfield, NY

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Westfield, NY AGENCY: Federal Communications... Review Act, see 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting...: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for part 73 continues to read as...

  16. 75 FR 76293 - Radio Broadcasting Services; Peach Springs, AZ

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-08

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Peach Springs, AZ AGENCY: Federal Communications... CFR Part 73 Radio, Radio broadcasting. 0 As stated in the preamble, the Federal Communications Commission amends 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 0 1. The authority...

  17. 47 CFR 95.201 - (R/C Rule 1) What is the Radio Control (R/C) Radio Service?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false (R/C Rule 1) What is the Radio Control (R/C) Radio Service? 95.201 Section 95.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Radio Control (R/C) Radio Service...

  18. 47 CFR 95.201 - (R/C Rule 1) What is the Radio Control (R/C) Radio Service?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false (R/C Rule 1) What is the Radio Control (R/C) Radio Service? 95.201 Section 95.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Radio Control (R/C) Radio Service...

  19. 47 CFR 95.201 - (R/C Rule 1) What is the Radio Control (R/C) Radio Service?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false (R/C Rule 1) What is the Radio Control (R/C) Radio Service? 95.201 Section 95.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Radio Control (R/C) Radio Service...

  20. 47 CFR 95.201 - (R/C Rule 1) What is the Radio Control (R/C) Radio Service?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false (R/C Rule 1) What is the Radio Control (R/C) Radio Service? 95.201 Section 95.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Radio Control (R/C) Radio Service...

  1. 47 CFR 95.201 - (R/C Rule 1) What is the Radio Control (R/C) Radio Service?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false (R/C Rule 1) What is the Radio Control (R/C) Radio Service? 95.201 Section 95.201 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Radio Control (R/C) Radio Service...

  2. Phase Coupling in Langmuir Wave Packets: Evidence for Four Wave Interactions in Solar Type III Radio Bursts

    NASA Technical Reports Server (NTRS)

    Thejappa, G.; MacDowall, R. J.; Bergamo, M.

    2012-01-01

    The four wave interaction process, known as the oscillating two stream instability (OTSI) is considered as one of the mechanisms responsible for stabilizing the electron beams associated with solar type III radio bursts. It has been reported that (1) an intense localized Langmuir wave packet associated with a type III burst contains the spectral characteristics of the OTSI: (a) a resonant peak at the local electron plasma frequency, f(sub pe), (b) a Stokes peak at a frequency slightly lower than f(sub pe), (c) anti-Stokes peak at a frequency slightly higher than f(sub pe), and (d) a low frequency enhancement below a few hundred Hz, (2) the frequencies and wave numbers of these spectral components satisfy the resonance conditions of the OTSI, and (3) the peak intensity of the wave packet is well above the thresholds for the OTSI as well as spatial collapse of envelope solitons. Here, for the first time, applying the trispectral analysis on this wave packet, we show that the tricoherence, which measures the degree of coherent four-wave coupling amongst the observed spectral components exhibits a peak. This provides an additional evidence for the OTSI and related spatial collapse of Langmuir envelope solitons in type III burst sources.

  3. 75 FR 71044 - Radio Broadcasting Services; Onekama, MI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-11-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Onekama, MI AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division, at the request of Northern Radio of Michigan, Inc., in... CFR Part 73 Radio, Radio broadcasting. 0 For the reasons discussed in the preamble, the...

  4. 76 FR 27296 - Private Land Mobile Radio Service Regulations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-11

    ... COMMISSION 47 CFR Part 90 Private Land Mobile Radio Service Regulations AGENCY: Federal Communications... implementation of Terrestrial Trunked Radio (TETRA) technology in the United States. We also seek comment on our... United States of land mobile radio equipment utilizing Terrestrial Trunked Radio (TETRA)...

  5. Enhancing In-Flight Transoceanic Communications Using Swift-64 Packet Mode Service

    NASA Technical Reports Server (NTRS)

    Slywczak, Richard A.

    2004-01-01

    Current aeronautical communications can be divided into two segments. The first provides state of the art, packet switched technology to the cabin passengers so that they have access to e-mail and web services. The second provides basic circuit switch communication technology to the cockpit, which does not use bandwidth as efficiently as packet switching nor promotes resource sharing. This paper explores the research efforts currently being conducted by the NASA/Glenn Research Center (GRC) for transoceanic communications. The goal is to bring packet mode services to both the cabin and the cockpit of the aircraft and be able to attain benefits by sharing the data link with cabin services. First, this paper will outline the goals of the program and detail the benefits and issues related to this research. We will explain our current laboratory setup and show an architecture implemented in the testbed. Finally, we will present a work plan that will show the progression of research over the next year. This plan will describe a complete cycle from conceptual design and laboratory implementation to the final flight testing.

  6. Can Public Radio Replace Federal Funds with Audience-Sensitive Income? Info. Packets No. 16.

    ERIC Educational Resources Information Center

    Giovannoni, David

    Public radio can survive cutbacks in federal subsidies, but only if these funds are reduced no more rapidly than public radio can replace them with newly-generated audience-sensitive revenues (listener support and underwriting). A model developed in this analysis suggests a three-to-five year "glide path" to zero federal support. Public…

  7. 76 FR 70904 - Commission Organization; Practice and Procedure; Radio Broadcast Services; and Experimental Radio...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-16

    ... COMMISSION 47 CFR Parts 0, 1, 73, and 74 Commission Organization; Practice and Procedure; Radio Broadcast Services; and Experimental Radio, Auxiliary, Special Broadcast and Other Program Distributional Services... obsolete. Section 1.805 of the Commission's rules requires common carriers engaged in public radio...

  8. 76 FR 69222 - Radio Broadcasting Services; Altamont, OR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-08

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Altamont, OR AGENCY: Federal Communications Commission... 47 CFR Part 73 Radio. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio... Commission proposes to amend 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 1. The...

  9. 78 FR 37474 - Radio Broadcasting Services; Dove Creek, Colorado

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-21

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Dove Creek, Colorado AGENCY: Federal Communications..., allots FM Channel 229C3 as a first local transmission service at Dove Creek, Colorado. Channel 229C3 can... CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Chief,...

  10. 76 FR 42573 - Radio Broadcasting Services; Oklahoma and Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-19

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Oklahoma and Texas AGENCY: Federal Communications... Review filed by Rawhide Radio, LLC, Capstar TX Limited Partnership, Clear Channel Broadcasting...

  11. A Rate-Based Congestion Control Algorithm for the SURAP 4 Packet Radio Architecture (SRNTN-72)

    DTIC Science & Technology

    1990-01-01

    resourcc Ihoe rluniher of oiitrofl 1.ms iteriton’, required to culsll’, Ihrotlihni K.,n the frder the 4lrithn 1 ofthe ntnih r of1 floss , n_ lum the...because it is easy to compute and yields acceptable values. although it tends to underestimate slightl the number of transmissions attributable to...in the figure. We have preferred to only plot this range to allow easy comparison between bits-per-second rations and packets-per-second rations. Both

  12. 47 CFR 95.401 - (CB Rule 1) What are the Citizens Band Radio Services?

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false (CB Rule 1) What are the Citizens Band Radio... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service General Provisions § 95.401 (CB Rule 1) What are the Citizens Band Radio Services? The Citizens Band Radio Services are:...

  13. 47 CFR 95.401 - (CB Rule 1) What are the Citizens Band Radio Services?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false (CB Rule 1) What are the Citizens Band Radio... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service General Provisions § 95.401 (CB Rule 1) What are the Citizens Band Radio Services? The Citizens Band Radio Services are:...

  14. 47 CFR 95.401 - (CB Rule 1) What are the Citizens Band Radio Services?

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false (CB Rule 1) What are the Citizens Band Radio... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service General Provisions § 95.401 (CB Rule 1) What are the Citizens Band Radio Services? The Citizens Band Radio Services are:...

  15. 47 CFR 95.401 - (CB Rule 1) What are the Citizens Band Radio Services?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false (CB Rule 1) What are the Citizens Band Radio... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service General Provisions § 95.401 (CB Rule 1) What are the Citizens Band Radio Services? The Citizens Band Radio Services are:...

  16. 77 FR 62481 - Radio Broadcasting Services; Crownpoint, NM

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-15

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Crownpoint, NM AGENCY: Federal Communications....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR Part 73 as follows: PART...

  17. 75 FR 41381 - Private Land Mobile Radio Services

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-16

    ... COMMISSION 47 CFR Part 90 Private Land Mobile Radio Services AGENCY: Federal Communications Commission... private land mobile radio licensees in the 150-174 MHz and 421-512 MHz bands. The Commission denied relief... land mobile radio licensees in the 150-174 MHz and 421-512 MHz bands. The full text of ] this...

  18. 78 FR 61251 - Radio Broadcasting Services; Heber Springs, Arkansas.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-03

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Heber Springs, Arkansas. AGENCY: Federal....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR Part 73 as follows: PART...

  19. 78 FR 3877 - Radio Broadcasting Services; Peach Springs, AZ

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-17

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Peach Springs, AZ AGENCY: Federal Communications... filing procedures for comments, see 47 CFR 1.415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio...

  20. 76 FR 13579 - Radio Broadcasting Services; Hebbronville, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-14

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Hebbronville, TX AGENCY: Federal Communications... filing procedures for comments, see 47 CFR 1.415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. For the reasons discussed in the preamble, the Federal Communications...

  1. 77 FR 52292 - Radio Broadcasting Services; Greenup, IL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-29

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Greenup, IL AGENCY: Federal Communications Commission....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART...

  2. 78 FR 12010 - Radio Broadcasting Services; Pearsall, Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-21

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Pearsall, Texas AGENCY: Federal Communications....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART...

  3. 77 FR 43216 - Radio Broadcasting Services; Randsburg, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-24

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Randsburg, CA AGENCY: Federal Communications....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART...

  4. 77 FR 16800 - Radio Broadcasting Services; Westfield, NY

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Westfield, NY AGENCY: Federal Communications... filing procedures for comments, see 47 CFR 1.415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio...

  5. 78 FR 27342 - Radio Broadcasting Services; Moran, Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Moran, Texas AGENCY: Federal Communications Commission... filing procedures for comments, see 47 CFR 1.415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief, Audio...

  6. 77 FR 64792 - Radio Broadcasting Services; Pike Road, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Pike Road, AL AGENCY: Federal Communications....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting. Federal Communications... preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART...

  7. 77 FR 64758 - Radio Broadcasting Services; Randsburg, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-23

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Randsburg, CA AGENCY: Federal Communications... application for Station KSSI (FM), requesting to upgrade the facilities of the FM station from Channel 274A to... Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez, Assistant Chief,...

  8. 76 FR 13524 - Radio Broadcasting Services; Willow Creek, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-14

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Willow Creek, CA AGENCY: Federal Communications... FM Channel 258A at Willow Creek, California. Channel 258A can be allotted at Willow Creek, consistent... Congressional Review Act, see U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio...

  9. 77 FR 50053 - Radio Broadcasting Services; Westley, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-20

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Westley, CA AGENCY: Federal Communications Commission... subsequent order. Accordingly, we are amending the FM Table of Allotments by removing the NCE ``asterisk... 73 Radio, Radio broadcasting. Federal Communications Commission. Peter H. Doyle, Chief,...

  10. 78 FR 25861 - Radio Broadcasting Services; Peach Springs, Arizona

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-03

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Peach Springs, Arizona AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division, at the request of The Hualapai Tribe, allots FM....S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Radio, Radio broadcasting....

  11. 78 FR 69629 - Revitalization of the AM Radio Service

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-20

    ... COMMISSION 47 CFR Part 73 Revitalization of the AM Radio Service AGENCY: Federal Communications Commission... broadcast radio service, and to ease regulatory burdens on existing AM broadcasters. The Commission also solicits further comments and suggestions designed to foster the revitalization of the AM broadcast...

  12. 75 FR 47141 - Review of Personal Radio Services Rules

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-04

    ...In this document, the Commission proposes to update, reorganize, simplify and streamline its Personal Radio Services rules to reflect technological advances and other changes in the way the American public uses the Personal Radio Services. In addition to improving the clarity of the rules, this document includes proposals intended to reduce unnecessary regulatory burdens on users, improve......

  13. 47 CFR 27.1217 - Competitive bidding procedures for the Broadband Radio Service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Broadband Radio Service. 27.1217 Section 27.1217 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1217 Competitive bidding procedures for the Broadband...

  14. 47 CFR 27.1217 - Competitive bidding procedures for the Broadband Radio Service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Broadband Radio Service. 27.1217 Section 27.1217 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1217 Competitive bidding procedures for the Broadband...

  15. 47 CFR 27.1217 - Competitive bidding procedures for the Broadband Radio Service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Broadband Radio Service. 27.1217 Section 27.1217 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1217 Competitive bidding procedures for the Broadband...

  16. 47 CFR 27.1217 - Competitive bidding procedures for the Broadband Radio Service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Broadband Radio Service. 27.1217 Section 27.1217 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1217 Competitive bidding procedures for the Broadband...

  17. 47 CFR 27.1217 - Competitive bidding procedures for the Broadband Radio Service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Broadband Radio Service. 27.1217 Section 27.1217 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio Service and Educational Broadband Service § 27.1217 Competitive bidding procedures for the Broadband...

  18. Transistor Radio Receivers; Radio and Television Service, Intermediate: 9785.04.

    ERIC Educational Resources Information Center

    Dade County Public Schools, Miami, FL.

    The course outlined is one of the required courses in the Radio and Television Service Curriculum. Mastery of the skills in Basic Radio Circuits and Vacuum Tube AM Troubleshooting (9785.03) is a prerequisite. Eight blocks of instruction are divided into several units each. The instruction blocks are: orientation, fundamentals of transistor…

  19. 77 FR 2242 - Radio Broadcasting Services; Pike Road, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-17

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Pike Road, AL AGENCY: Federal Communications....415 and 1.420. List of Subjects in 47 CFR Part 73 Radio. Federal Communications Commission. Nazifa... preamble, the Federal Communications Commission proposes to amend 47 CFR part 73 as follows: PART...

  20. 75 FR 52872 - Radio Broadcasting Services; Blythe, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-30

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Blythe, CA AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division, at the request of Prescott Valley Radio Broadcasting Company, Inc., substitutes FM Channel 247B for Channel 239B at Blythe, California. Channel 247B can...

  1. An Efficient Shared Adaptive Packet Loss Concealment Scheme through 1-Port Gateway System for Internet Telephony Service

    NASA Astrophysics Data System (ADS)

    Kim, Jinsul; Lee, Hyunwoo; Ryu, Won; Lee, Byungsun; Hahn, Minsoo

    In this letter, we propose a shared adaptive packet loss concealment scheme for the high quality guaranteed Internet telephony service which connects multiple users. In order to recover packet loss efficiently in the all-IP based convergence environment, we provide a robust signal recovery scheme which is based on the shared adaptive both-side information utilization. This scheme is provided according to the average magnitude variation across the frames and the pitch period replication on the 1-port gateway (G/W) system. The simulated performance demonstrates that the proposed scheme has the advantages of low processing times and high recovery rates in the all-IP based ubiquitous environment.

  2. 77 FR 38761 - Radio Broadcasting Services; Pike Road, AL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-29

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Pike Road, AL AGENCY: Federal Communications Commission. ACTION: Proposal rule; dismissal. SUMMARY: The Audio Division dismisses the petition...

  3. 78 FR 11987 - Radio Broadcasting Services; Avalon, California

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-21

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Avalon, California AGENCY: Federal Communications Commission. ACTION: Final rule; announcement of effective date. SUMMARY: This document announces...

  4. 47 CFR 95.1 - The General Mobile Radio Service (GMRS).

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false The General Mobile Radio Service (GMRS). 95.1 Section 95.1 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.1 The General Mobile...

  5. 47 CFR 95.1 - The General Mobile Radio Service (GMRS).

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false The General Mobile Radio Service (GMRS). 95.1 Section 95.1 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.1 The General Mobile...

  6. 47 CFR 95.1 - The General Mobile Radio Service (GMRS).

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false The General Mobile Radio Service (GMRS). 95.1 Section 95.1 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.1 The General Mobile...

  7. 47 CFR 95.1 - The General Mobile Radio Service (GMRS).

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false The General Mobile Radio Service (GMRS). 95.1 Section 95.1 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.1 The General Mobile...

  8. 47 CFR 95.1 - The General Mobile Radio Service (GMRS).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false The General Mobile Radio Service (GMRS). 95.1 Section 95.1 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.1 The General Mobile...

  9. 78 FR 71557 - Radio Broadcasting Services; Tohatchi, New Mexico

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-29

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Tohatchi, New Mexico AGENCY: Federal Communications... filed by the Navajo Nation to amend the FM Table of Allotments, Section 73.202(b) of the Commission's Rules, by allotting FM Channel 268C2, Tohatchi, New Mexico, as a first local service under the...

  10. 78 FR 36683 - Radio Broadcasting Services; Summit, Mississippi

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-19

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Summit, Mississippi AGENCY: Federal Communications... Broadcasting, allots FM Channel 228A ] as a first local service at Summit, Mississippi. To accommodate that allotment, the Audio Division reclassifies Station WQUE-FM, New Orleans, Louisiana, to specify operation...

  11. 76 FR 36384 - Radio Broadcasting Services; Brackettville, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Brackettville, TX AGENCY: Federal Communications... request of RF Services, Inc., licensee of a new FM station at Rocksprings, Texas, that requests the... Rocksprings, to Brackettville, Texas, and modification of the new FM station authorization. See File No....

  12. 75 FR 59645 - Radio Broadcast Services and Multichannel Video and Cable Television Service; Clarification...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-28

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Parts 73 and 76 Radio Broadcast Services and Multichannel Video and Cable Television... number of requirements related to Radio Broadcast Services and Multichannel Video and Cable...

  13. STRS Radio Service Software for NASA's SCaN Testbed

    NASA Technical Reports Server (NTRS)

    Mortensen, Dale J.; Bishop, Daniel Wayne; Chelmins, David T.

    2012-01-01

    NASAs Space Communication and Navigation(SCaN) Testbed was launched to the International Space Station in 2012. The objective is to promote new software defined radio technologies and associated software application reuse, enabled by this first flight of NASAs Space Telecommunications Radio System(STRS) architecture standard. Pre-launch testing with the testbeds software defined radios was performed as part of system integration. Radio services for the JPL SDR were developed during system integration to allow the waveform application to operate properly in the space environment, especially considering thermal effects. These services include receiver gain control, frequency offset, IQ modulator balance, and transmit level control. Development, integration, and environmental testing of the radio services will be described. The added software allows the waveform application to operate properly in the space environment, and can be reused by future experimenters testing different waveform applications. Integrating such services with the platform provided STRS operating environment will attract more users, and these services are candidates for interface standardization via STRS.

  14. STRS Radio Service Software for NASA's SCaN Testbed

    NASA Technical Reports Server (NTRS)

    Mortensen, Dale J.; Bishop, Daniel Wayne; Chelmins, David T.

    2013-01-01

    NASA's Space Communication and Navigation(SCaN) Testbed was launched to the International Space Station in 2012. The objective is to promote new software defined radio technologies and associated software application reuse, enabled by this first flight of NASA's Space Telecommunications Radio System (STRS) architecture standard. Pre-launch testing with the testbed's software defined radios was performed as part of system integration. Radio services for the JPL SDR were developed during system integration to allow the waveform application to operate properly in the space environment, especially considering thermal effects. These services include receiver gain control, frequency offset, IQ modulator balance, and transmit level control. Development, integration, and environmental testing of the radio services will be described. The added software allows the waveform application to operate properly in the space environment, and can be reused by future experimenters testing different waveform applications. Integrating such services with the platform provided STRS operating environment will attract more users, and these services are candidates for interface standardization via STRS.

  15. 47 CFR 73.6020 - Protection of stations in the land mobile radio service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Protection of stations in the land mobile radio... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6020 Protection of stations in the land mobile radio service. An application for digital operation of an existing Class A...

  16. 47 CFR 73.6020 - Protection of stations in the land mobile radio service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Protection of stations in the land mobile radio... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6020 Protection of stations in the land mobile radio service. An application for digital operation of an existing Class A...

  17. 47 CFR 73.6020 - Protection of stations in the land mobile radio service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Protection of stations in the land mobile radio... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6020 Protection of stations in the land mobile radio service. An application for digital operation of an existing Class A...

  18. 47 CFR 73.6020 - Protection of stations in the land mobile radio service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Protection of stations in the land mobile radio... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6020 Protection of stations in the land mobile radio service. An application for digital operation of an existing Class A...

  19. 75 FR 20951 - Amendment of the Commission's Rules Regarding Amateur Radio Service Communications During...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-22

    ..., the National Weather Service, and the American Red Cross. Amateur radio stations provided urgently... COMMISSION 47 CFR Part 97 Amendment of the Commission's Rules Regarding Amateur Radio Service Communications... amend the Commission's amateur radio service rules with respect to amateur radio operations...

  20. 47 CFR 73.6020 - Protection of stations in the land mobile radio service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Protection of stations in the land mobile radio... RADIO SERVICES RADIO BROADCAST SERVICES Class A Television Broadcast Stations § 73.6020 Protection of stations in the land mobile radio service. An application for digital operation of an existing Class A...

  1. 76 FR 45491 - Creation of a Low Power Radio Service; Amendment of Service and Eligibility Rules for FM...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-29

    ... limited FM spectrum in a manner which promotes the ``fair, efficient, and equitable distribution of radio... permanent LPFM service in larger markets. In this regard, we believe that the NCE FM service, the radio... COMMISSION 47 CFR Part 74 Creation of a Low Power Radio Service; Amendment of Service and Eligibility...

  2. 77 FR 2916 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-20

    ... Commission adopted procedures designed to promote the initiation of commercial FM radio service by and to... provide commercial FM radio service to their Tribal Lands and members. The Tribal bidding credit was... the commercial FM service on the same footing as other radio services with regard to the...

  3. 77 FR 58800 - Radio Broadcasting Services; Knox City, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-24

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Knox City, TX AGENCY: Federal Communications... Allotments by substituting Channel 277A for vacant Channel 291A, at Knox City, Texas. The proposal is part of... at Knox City, Texas, in compliance with the Commission's minimum distance separation requirements...

  4. 76 FR 12292 - Radio Broadcasting Services; Kualapuu, HI

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-07

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Kualapuu, HI AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division, at the request of Kemp Communications, Inc., allots...

  5. 77 FR 75946 - Radio Broadcasting Services; Dove Creek, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-26

    ... COMMISSION 47 CFR Part 73 . Radio Broadcasting Services; Dove Creek, CO AGENCY: Federal Communications Commission. ACTION: Proposed rule. SUMMARY: This document sets forth a proposal to amend the FM Table of... by Cochise Media Licenses, LLC, proposing to amend the Table of Allotments by allotting FM...

  6. 78 FR 73793 - Radio Broadcasting Services; Evart and Ludington, Michigan

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-09

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Evart and Ludington, Michigan AGENCY: Federal... Lakeshore Licenses, LLC (``Synergy''), licensee of Station WMLQ(FM), Manistee, Michigan, the deletion of vacant FM Channel 274A at Evart, Michigan. The document also proposes the return of Stations...

  7. 76 FR 37049 - Radio Broadcasting Services; Bastrop, LA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-24

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Bastrop, LA AGENCY: Federal Communications Commission... Kenneth W. Diebel, licensee of FM Station KGGM, Channel 228A, Delhi, Louisiana, proposing the substitution of FM Channel 228A for vacant FM Channel 230A at Bastrop, Louisiana. The proposed substitution...

  8. 76 FR 79113 - Radio Broadcasting Services; Bastrop, LA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-21

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Bastrop, LA AGENCY: Federal Communications Commission...''), deletes FM Channel 230A and allots FM Channel 228A at Bastrop, Louisiana. The purpose of the proposed channel substitution is to accommodate Petitioner's pending application to upgrade FM Station KGGM,...

  9. 75 FR 76294 - Radio Broadcasting Services: Pacific Junction, IA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-08

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services: Pacific Junction, IA AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The staff deletes FM Channel 299C2 at Pacific Junction, Iowa... landing system configurations and the Commission's spacing requirements Further, there are no other...

  10. 78 FR 42700 - Radio Broadcasting Services; Matagorda, Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-17

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Matagorda, Texas AGENCY: Federal Communications..., allots FM Channel 291A and deletes FM Channel 252A at Matagorda, Texas. This allotment change is part of a hybrid rule making and FM application proposal. Channel 291A can be allotted at...

  11. 78 FR 21337 - Radio Broadcasting Services; Matagorda, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-10

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Matagorda, TX AGENCY: Federal Communications... filed by Tejas Broadcasting Ltd., LLP (``Petitioner''), licensee of FM Station KMJR, Channel 252C2, Odem, Texas. Petitioner proposes to amend the FM Table of Allotments by substituting Channel 291A for...

  12. 77 FR 76936 - Radio Broadcasting Services; Tignall, GA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-31

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Tignall, GA AGENCY: Federal Communications Commission..., LLC, allots FM Channel 287A and deletes FM Channel 244A at Tignall, Georgia. The allotment change is part of a hybrid rule making and FM application proposal. Channel 287A can be allotted at...

  13. 76 FR 79112 - Radio Broadcasting Services; Milford, UT

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-21

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Milford, UT AGENCY: Federal Communications Commission. ACTION: Final Rule. SUMMARY: The Audio Division, at the request of Canyon Media Group, LLC, allots FM Channel 288C and deletes FM Channel 285C at Milford, Utah. The allotment change is part of a hybrid...

  14. An Analysis of the Television and Radio Service Occupation.

    ERIC Educational Resources Information Center

    Pomeroy, James W.; And Others

    The general purpose of the occupational analysis is to provide workable, basic information dealing with the many and varied duties performed in the television and radio service occupation. The document opens with a brief introduction followed by a job description. The bulk of the document is presented in table form. Eight duties are broken down…

  15. 78 FR 42700 - Radio Broadcasting Services; Various Locations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-17

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Various Locations AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division updates the FM Table of Allotments to reinstate five vacant FM allotments in various communities in Maryland, Oregon, Texas, Virginia, and Wyoming...

  16. 75 FR 3694 - Radio Broadcasting Services, Peach Springs, Arizona

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services, Peach Springs, Arizona AGENCY: Federal Communications... Media Licenses, LLC, proposing the allotment of FM Channel 281C3 at Peach Springs, Arizona. The...), Cochise Media Licenses, the tentative selectee in Auction 79 and applicant for a new FM station on...

  17. 76 FR 67375 - Radio Broadcasting Services; Various Locations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-01

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Various Locations AGENCY: Federal Communications Commission. ACTION: Final rule. SUMMARY: The Audio Division, on its own motion, updates the FM Table of Allotments to reinstate certain vacant FM allotments. Formerly, the FM Table listed all vacant FM...

  18. 77 FR 23203 - Radio Broadcasting Services; Summit, MS

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-18

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Summit, MS AGENCY: Federal Communications Commission. ACTION: Proposed rule. SUMMARY: This document sets forth a proposal to amend the FM Table of Allotments... Table of Allotments by allotting FM Channel 228A at Summit, Mississippi, as that community's first...

  19. 75 FR 41123 - Radio Broadcasting Services; Gearhart, OR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-15

    ... COMMISSION 47 CFR Part 73 . Radio Broadcasting Services; Gearhart, OR AGENCY: Federal Communications Commission. ACTION: Proposed rule. SUMMARY: This document sets forth a proposal to amend the FM Table of... comment on a petition filed by Black Hills Broadcasting, L.P. proposing the allotment of FM Channel...

  20. 76 FR 49364 - Radio Broadcasting Services; Gearhart, Madras, and Manzanita, OR

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-10

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Gearhart, Madras, and Manzanita, OR AGENCY: Federal... CFR Part 73 Radio, Radio broadcasting. Federal Communications Commission. James D. Bradshaw, Deputy... Communications Commission amends 47 CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 0 1. The...

  1. 76 FR 15857 - Radio Broadcasting Services; Early and Lake Brownwood, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-22

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Early and Lake Brownwood, TX AGENCY: Federal... the Congressional Review Act, see U.S.C. 801(a)(1)(A). List Of Subjects in 47 CFR Part 73 Radio, Radio... CFR part 73 as follows: PART 73--RADIO BROADCAST SERVICES 0 1. The authority citation for Part...

  2. Reliability aspects of the future hybrid optical network and quality of service issues for real time and packet traffic

    NASA Astrophysics Data System (ADS)

    Marciniak, Marian

    2004-09-01

    While Internet traffic increases dramatically and now it exceeds the almost stable voice traffic, new efficient solutions for network architecture are sought. One of the main problems to be resolved is the basic concept of the future network performance. While actual networks are based on 'circuit switching' connection networks with IP packets forwarded given the network offers some free resources, a number of researchers foresee the future network as a 'packet switched' connectionless network which would support also the traditional real time services with phone calls as the most representative example. This is driven by the growing use of voice over IP services. Unfortunately, the Quality of Service is actually not sufficient for wide acceptance of that technique. In fact, Internet is based on the 'best-effort' principle in what it fudamentally differs from circuit-switched network which has been developed uniquely to provide excellent voice quality during last century. Moreover, the reliability of the network is a crucial factor in emergency communications, what has recently became a subject of intense activity at national and international scale. As a consequence, the idea of dropping the converged network with voice-over-IP concept is hard to accept for a great majority and those expressing it are usually looked as strange or even dangerous individuals. Nevertheless, those fundamental difficulties become obvious for a growing number of people who approach the future network evolution more fundamentally, and try to trace reasonable and economic ways of the future network development. The author of this paper has extensively developed a concept of a "hybrid network" which consists of real-time subnetwork and packet network separated in the optical frequency domain that will be discussed in detail in this paper. This optimized network concept is intended to guarantee both reliability of the network and Quality of Service as well.

  3. 78 FR 70499 - An Inquiry Into the Commission's Policies and Rules Regarding AM Radio Service Directional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-26

    ... AM Radio Service Directional Antenna Performance Verification AGENCY: Federal Communications... Broadcast Station Antenna Patterns * * * * * Federal Communications Commission. Marlene H. Dortch,...

  4. A Study of Quality of Service Communication for High-Speed Packet-Switching Computer Sub-Networks

    NASA Technical Reports Server (NTRS)

    Cui, Zhenqian

    1999-01-01

    In this thesis, we analyze various factors that affect quality of service (QoS) communication in high-speed, packet-switching sub-networks. We hypothesize that sub-network-wide bandwidth reservation and guaranteed CPU processing power at endpoint systems for handling data traffic are indispensable to achieving hard end-to-end quality of service. Different bandwidth reservation strategies, traffic characterization schemes, and scheduling algorithms affect the network resources and CPU usage as well as the extent that QoS can be achieved. In order to analyze those factors, we design and implement a communication layer. Our experimental analysis supports our research hypothesis. The Resource ReSerVation Protocol (RSVP) is designed to realize resource reservation. Our analysis of RSVP shows that using RSVP solely is insufficient to provide hard end-to-end quality of service in a high-speed sub-network. Analysis of the IEEE 802.lp protocol also supports the research hypothesis.

  5. Private land mobile radio services; amendment of the Commission's rules concerning general eligibility in the industrial radio services: Federal Communications Commission. Final rule.

    PubMed

    1982-02-10

    This document adopts a rule amendment to permit the licensing of non-profit corporations and associations of eligible users in the Business and Special Industrial Radio Services in the bands below 512 MHz. The FCC now permits the licensing of non-profit corporations and associations of eligible users in each of the Industrial Radio Services except the Business and Special Industrial Radio Services below 800 MHz and permits it in all Industrial Radio Services including Business and Special Industrial above 800 MHz. The amendment will eliminate this exception.

  6. 78 FR 27306 - Radio Broadcasting Services; Dermott, Arkansas, and Cleveland, Mississippi

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Dermott, Arkansas, and Cleveland, Mississippi AGENCY... Delta Radio Network, LLC, substitutes FM Channel 224A for 289A at Dermott, Arkansas, and substitutes FM... CFR part 73 Radio, Radio broadcasting. Federal Communications Commission. Nazifa Sawez,...

  7. A Study of Public Radio Stations' Educational Services, 1978-79.

    ERIC Educational Resources Information Center

    Corporation for Public Broadcasting, Washington, DC.

    This second national survey of public radio stations' involvement in educational services to schools, colleges, and universities was conducted by the Corporation for Public Broadcasting (CPB) for use by individual public radio stations, educational agencies, and other organizations interested and involved in planning public radio's services to…

  8. 47 CFR 2.1060 - Equipment for use in the amateur radio service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Equipment for use in the amateur radio service... ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Equipment Authorization Procedures Certification § 2.1060 Equipment for use in the amateur radio service. (a) The general provisions of §§ 2.925,...

  9. 47 CFR 0.482 - Application for waiver of wireless radio service rules.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 1 2014-10-01 2014-10-01 false Application for waiver of wireless radio... Taking Examinations § 0.482 Application for waiver of wireless radio service rules. All requests for waiver of the rules (see § 1.925 of this chapter) governing the Wireless Radio Services (see § 1.907...

  10. 47 CFR 2.1060 - Equipment for use in the amateur radio service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Equipment for use in the amateur radio service... ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Equipment Authorization Procedures Certification § 2.1060 Equipment for use in the amateur radio service. (a) The general provisions of §§ 2.925,...

  11. 47 CFR 2.1060 - Equipment for use in the amateur radio service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Equipment for use in the amateur radio service... ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Equipment Authorization Procedures Certification § 2.1060 Equipment for use in the amateur radio service. (a) The general provisions of §§ 2.925,...

  12. 47 CFR 0.482 - Application for waiver of wireless radio service rules.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 1 2013-10-01 2013-10-01 false Application for waiver of wireless radio... Taking Examinations § 0.482 Application for waiver of wireless radio service rules. All requests for waiver of the rules (see § 1.925 of this chapter) governing the Wireless Radio Services (see § 1.907...

  13. 47 CFR 0.482 - Application for waiver of wireless radio service rules.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Application for waiver of wireless radio... Taking Examinations § 0.482 Application for waiver of wireless radio service rules. All requests for waiver of the rules (see § 1.925 of this chapter) governing the Wireless Radio Services (see § 1.907...

  14. 47 CFR 2.1060 - Equipment for use in the amateur radio service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Equipment for use in the amateur radio service... ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Equipment Authorization Procedures Certification § 2.1060 Equipment for use in the amateur radio service. (a) The general provisions of §§ 2.925,...

  15. 76 FR 44279 - Radio Broadcasting Services; Clinchco, VA, and Coal Run, KY

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-25

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Clinchco, VA, and Coal Run, KY AGENCY: Federal... the Radio Broadcast Services, Report and Order, 71 FR 76208 (December 20, 2006). This document is not...) because no changes are being made to 47 CFR 73.202(b)). List of Subjects in 47 CFR Part 73 Radio,...

  16. 47 CFR 0.482 - Application for waiver of wireless radio service rules.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 1 2012-10-01 2012-10-01 false Application for waiver of wireless radio... Taking Examinations § 0.482 Application for waiver of wireless radio service rules. All requests for waiver of the rules (see § 1.925 of this chapter) governing the Wireless Radio Services (see § 1.907...

  17. 47 CFR 0.482 - Application for waiver of wireless radio service rules.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 1 2011-10-01 2011-10-01 false Application for waiver of wireless radio... Taking Examinations § 0.482 Application for waiver of wireless radio service rules. All requests for waiver of the rules (see § 1.925 of this chapter) governing the Wireless Radio Services (see § 1.907...

  18. 75 FR 43423 - 1998 Biennial Regulatory Review-Private Land Mobile Radio Services

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-26

    ... COMMISSION 47 CFR Part 95 1998 Biennial Regulatory Review--Private Land Mobile Radio Services AGENCY: Federal... Commission denies the petition filed by the Personal Radio Steering Group (PRSG) regarding certain Multi-Use Radio Service (MURS) rules. In essence, the Commission finds that PRSG has not demonstrated that...

  19. 76 FR 18942 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-06

    ... COMMISSION 47 CFR Parts 73 and 74 Policies To Promote Rural Radio Service and To Streamline Allotment and... American tribes, and to promote the initiation and retention of radio service in and to smaller communities... Tribe or Tribal-owned entity proposing a new radio station qualifying for the Tribal Priority must...

  20. An economic systems analysis of land mobile radio telephone services

    NASA Technical Reports Server (NTRS)

    Leroy, B. E.; Stevenson, S. M.

    1980-01-01

    This paper deals with the economic interaction of the terrestrial and satellite land-mobile radio service systems. The cellular, trunked and satellite land-mobile systems are described. Parametric equations are formulated to allow examination of necessary user thresholds and growth rates as functions of system costs. Conversely, first order allowable systems costs are found as a function of user thresholds and growth rates. Transitions between satellite and terrestrial service systems are examined. User growth rate density (user/year/km squared) is shown to be a key parameter in the analysis of systems compatibility. The concept of system design matching the price demand curves is introduced and examples are given. The role of satellite systems is critically examined and the economic conditions necessary for the introduction of satellite service are identified.

  1. Coordination procedure for radio relay and communication satellite services

    NASA Technical Reports Server (NTRS)

    Eckerman, J.

    1973-01-01

    A global rain rate statistic model is used to link microwave propagation statistics to measurable rain statistics in order to develop international telecommunication site criteria for radio relay and communication satellite services that minimize interference between receivers and transmitters. This rain coordination procedure utilizes a rain storm cell size, a statistical description of the rainfall rate within the cell valid for most of the earth's surface, approximations between Raleigh scatter and constancy of precipitation with altitude, and an analytic relation between radar reflectivity and rain rate.

  2. 47 CFR 64.402 - Policies and procedures for the provision of priority access service by commercial mobile radio...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... priority access service by commercial mobile radio service providers. 64.402 Section 64.402... Policies and procedures for the provision of priority access service by commercial mobile radio service providers. Commercial mobile radio service providers that elect to provide priority access service...

  3. 78 FR 63228 - Determination That Potassium Citrate, 10 Milliequivalents/Packet and 20 Milliequivalents/Packet...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-23

    ... HUMAN SERVICES Food and Drug Administration Determination That Potassium Citrate, 10 Milliequivalents...) has determined that Potassium Citrate, 10 milliequivalents/packet (mEq/packet) and 20 mEq/ packet, was... approve abbreviated new drug applications (ANDAs) for Potassium Citrate, 10 mEq/packet and 20...

  4. 76 FR 74721 - Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers and Other...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-01

    ... COMMISSION 47 CFR Part 20 Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers... Roaming Obligations of Commercial Mobile Radio Service Providers and Other Providers of Mobile Data...-based providers of commercial mobile data services to offer data roaming arrangements to other...

  5. Throughput and delay characteristics for a slow-frequency hopped aircraft-to-aircraft packet radio network

    NASA Astrophysics Data System (ADS)

    Harrison, Scott Russell

    1990-03-01

    Current lack of data transfer capability between tactical aircraft results in decreased mission effectiveness or the need to equip every aircraft with all the sensors and data processing equipment to perform each task expected of them. In the Air Force, these developments established the need for aircraft-to-aircraft data communications so that navigation, threat and targeting information could be shared within a flight and so that digital voice communications could also be maintained. Data rates within a flight of fighter aircraft to support these requirements will need to be between 100 and 250 kilobits/second (KBPS) and between 2.4 KBPS and 16 KBPS between the flight and a command and control aircraft. Other sources place the former figure as high as 512 KBPS. To increase the security of these radio channels, against both jamming and intrusion, anti-jam and low probability of interception (LPI) techniques must be used. One method of achieving these capabilities is to use spread spectrum techniques such as frequency hopping. The Air Force is currently concentrating its efforts around the Joint Tactical Information Distribution System (JTIDS).

  6. 76 FR 14362 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-16

    ... American Tribes and Alaska Native Villages (Tribes) in obtaining commercial FM radio station authorizations... commercial FM radio channel allotments that were added to the Table of Allotments using the Tribal Priority... commercial FM radio service to their Tribal Lands and members. The Tribal bidding credit was...

  7. Private Land Mobile Radio Services--Federal Communications Commission. Final rule.

    PubMed

    1982-09-16

    The Commission adopts a Second Report and Order releasing reserved radio spectrum in the 806-821/851-866 MHz bands for Private Land Mobile Radio Service use. The rules adopted provide enhanced flexibility in radio system design and user options. The action is necessary to satisfy land mobile spectrum needs across the country.

  8. 77 FR 21002 - Creation of a Low Power Radio Service; Amendment of Service and Eligibility Rules for FM...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-09

    ... COMMISSION 47 CFR Part 74 Creation of a Low Power Radio Service; Amendment of Service and Eligibility Rules for FM Broadcast Translator Stations AGENCY: Federal Communications Commission. ACTION: Final rule... the Local Community Radio Act (``LCRA''). The LCRA requires the FCC to balance the competing...

  9. Automation of servicibility of radio-relay station equipment

    NASA Astrophysics Data System (ADS)

    Uryev, A. G.; Mishkin, Y. I.; Itkis, G. Y.

    1985-03-01

    Automation of the serviceability of radio relay station equipment must ensure central gathering and primary processing of reliable instrument reading with subsequent display on the control panel, detection and recording of failures soon enough, advance enough warning based on analysis of detertioration symptoms, and correct remote measurement of equipment performance parameters. Such an inspection will minimize transmission losses while reducing nonproductive time and labor spent on documentation and measurement. A multichannel automated inspection system for this purpose should operate by a parallel rather than sequential procedure. Digital data processing is more expedient in this case than analog method and, therefore, analog to digital converters are required. Spepcial normal, above limit and below limit test signals provide means of self-inspection, to which must be added adequate interference immunization, stabilization, and standby power supply. Use of a microcomputer permits overall refinement and expansion of the inspection system while it minimizes though not completely eliminates dependence on subjective judgment.

  10. Further Analyses of the Test of Paid Radio Advertising for Armed Services Recruitment. Volume IV,

    DTIC Science & Technology

    1977-03-01

    During Fall 1975, a test was designed and executed to determine the effectiveness of paid radio as an addition to the advertising media mix in...support of military recruiting. A number of markets were matched on the basis of factors related to contracts for accession. Markets were subdivided, some...receiving radio for only a single service, other markets using radio for three different services, and remaining markets serving as controls. The

  11. 75 FR 22263 - Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-28

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 20 Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers... commercial mobile radio service (CMRS carriers), subject to Sections 201 and 202 of the Communications...

  12. 75 FR 46854 - Amendment of the Commission's Rules Regarding Amateur Radio Service Communications During...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-04

    ... volunteered to support many agencies, such as the Federal Emergency Management Agency, the National Weather... COMMISSION 47 CFR Part 97 Amendment of the Commission's Rules Regarding Amateur Radio Service Communications... drills or exercises. 2. One of the fundamental principles underlying the amateur radio service is...

  13. 78 FR 16816 - Radio Broadcasting Services; Ehrenberg, First Mesa, Kachina Village, Munds Park, Wickenburg, and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-19

    ... filed by Univision Radio License Corporation for an increase in existing service by Station KHOV-FM... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Ehrenberg, First Mesa, Kachina Village, Munds Park... Media Bureau grants a Counterproposal filed by Grenax Broadcasting II, LLC, for a new FM allotment...

  14. 75 FR 9856 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-04

    ... Services, LLC, MEDIA Access Pro Database on March 17, 2009, 10,884 (95%) of 11,404 commercial radio... COMMISSION 47 CFR Part 73 Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment... Tribes and Alaska Native Villages (Tribes) should receive a bidding credit in auctions for new...

  15. Proposal for Implementation of Office of Educational Radio Services.

    ERIC Educational Resources Information Center

    Petrizzi, David M.; Wright, A. J.

    Auburn University's radio station is being faced with providing quality public radio programing with inadequate resources, including money, personnel, and university support. This proposal is directed to the university community and discusses the university radio station's problems at three levels. At the federal level, concerns relate to…

  16. 47 CFR 101.135 - Shared use of radio stations and the offering of private carrier service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101... Operational Fixed Point-to-Point Microwave radio stations may share the use of their facilities on a...

  17. 47 CFR 101.135 - Shared use of radio stations and the offering of private carrier service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101... Operational Fixed Point-to-Point Microwave radio stations may share the use of their facilities on a...

  18. 47 CFR 101.135 - Shared use of radio stations and the offering of private carrier service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101... Operational Fixed Point-to-Point Microwave radio stations may share the use of their facilities on a...

  19. 47 CFR 101.135 - Shared use of radio stations and the offering of private carrier service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101... Operational Fixed Point-to-Point Microwave radio stations may share the use of their facilities on a...

  20. 47 CFR 101.135 - Shared use of radio stations and the offering of private carrier service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Technical Standards § 101... Operational Fixed Point-to-Point Microwave radio stations may share the use of their facilities on a...

  1. GUIDANCE PACKET.

    ERIC Educational Resources Information Center

    Modern Language Association of America, New York, NY.

    THIS PACKET PROVIDES VOCATIONAL AND ACADEMIC ADVICE TO THE LANGUAGE LEARNER AND USEFUL INFORMATION ABOUT LANGUAGE LEARNING TO TEACHERS, COUNSELORS, AND ADMINISTRATORS. THE DOCUMENTS, PUBLISHED FROM 1963 TO 1967, ARE--(1) "VOCATIONAL OPPORTUNITIES FOR FOREIGN LANGUAGE STUDENTS" BY GILBERT C. KETTELKAMP, (2) "ADVICE TO THE LANGUAGE LEARNER" BY…

  2. Information Packet.

    ERIC Educational Resources Information Center

    Cable Television Information Center, Washington, DC.

    Documents included in the packet are Federal Communications Commission (FCC) releases dealing with cable television and similar notices from other organizations. Among these are an interpretation of the FCC local origination decision of Dec. 9, 1974, explaining the repeal of the requirement that small cable systems originate programing while…

  3. 78 FR 44029 - Establishment of Rules and Policies for the Digital Audio Radio Satellite Service in the 2310...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-23

    ... COMMISSION 47 CFR Part 25 Establishment of Rules and Policies for the Digital Audio Radio Satellite Service... for Satellite Digital Audio Radio Service (SDARS) terrestrial repeaters adopted in an Order on... GHz Band; Establishment of Rules and Policies for the Digital Audio Radio Satellite Service in...

  4. A Distributed Datacube Analysis Service for Radio Telescopes

    NASA Astrophysics Data System (ADS)

    Mahadevan, V.; Rosolowsky, E.

    2011-07-01

    Current- and next-generation radio telescopes are poised to produce data at an unprecedented rate. We are developing the cyberinfrastructure to enable distributed processing and storage of FITS data cubes from these telescopes. In this contribution, we will present the data storage and network infrastructure that enables efficient searching, extraction and transfer of FITS datacubes. The infrastructure combines the iRODS distributed data management with a custom spatially-enabled PostgreSQL database. The data management system ingests FITS cubes, automatically populating the metadata database using FITS header data. Queries to the metadata service return matching records using VOTable format. The iRODS system allows for a distributed network of fileservers to store large data sets redundantly with a minimum of upkeep. Transfers between iRODS data sites use parallel I/O streams for maximum speed. Files are staged to the optimal host for download by an end user. The service can automatically extract subregions of individual or adjacent cubes registered to user-defined astrometric grids using the Montage package. The data system can query multiple surveys and return spatially registered data cubes to the user. Future development will allow the data system to utilize distributed processing environment to analyze datasets, returning only the calculation results to the end user. This cyberinfrastructure project combines many existing, open-source packages into a single deployment of a data system. The codebase can also function on two-dimensional images. The project is funded by CANARIE under the Network-Enabled Platforms 2 program.

  5. Broadcasting-satellite and fixed-satellite service considerations after the 1979 World Administrative Radio Conference

    NASA Astrophysics Data System (ADS)

    Akima, H.

    1981-04-01

    The revisions of World Administrative Radio Conference (WARC) of the inter-national radio regulations of the International Telecommunication Union (ITU) including the international table of frequency allocations are reviewed. The revised Radio Regulations will govern internationally the use of the radiofrequency spectrum and the geostationary satellite orbit for the rest of this century. Restricting its scope to the topics related to the broadcasting satellite and fixed satellite services in ITU Region 2 are reported.

  6. 78 FR 53054 - Radio Broadcasting Services; Chillicothe, Dublin, Hillsboro, and Marion, Ohio

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-28

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Chillicothe, Dublin, Hillsboro, and Marion, Ohio... document denies an Application for Review filed by the Committee for Competitive Columbus Radio... argued that the reallotment to Dublin could not be implemented because it would violate the local...

  7. 78 FR 41062 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-09

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...-20130509ABB, From SMITHS GROVE, KY, To HISEVILLE, KY; HOG RADIO, INC., Station KCYT, Facility ID 51098,...

  8. 76 FR 55388 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-07

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License. AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change the community of license: CBS Radio East Inc., Station WLZL, Facility ID 72177,...

  9. 78 FR 55075 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-09

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...-20120731AAA, From CONROE, TX, To BAYTOWN, TX; DALHART RADIO, INC., Station NEW, Facility ID 191569,...

  10. 77 FR 62512 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-10-15

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License. AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM..., OK; COMMUNITY RADIO PROJECT, Station KZET, Facility ID 173810, BPED-20120914AEF, From CORTEZ, CO,...

  11. 77 FR 38631 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-28

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...-20120515ABA, From FRANKLIN, LA, To BELLE ROSE, LA; CBS RADIO STATIONS INC., Station WMSF, Facility ID...

  12. 76 FR 14394 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-16

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. ] SUMMARY: The following applicants filed AM or FM proposals to change... GREENE, Station KOYD, Facility ID 166015, BMPH-20110128ABF, From GACKLE, ND, To TOWER CITY, ND; RADIO...

  13. 76 FR 65192 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-20

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...., Station NEW, Facility ID 166079, BNPH-20060310AEF, from Burke, SD, to Wagner, SD; Kona Coast Radio,...

  14. 75 FR 6395 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-09

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...-20100126AFU, From MERIDIAN, MS, To DECATUR, MS; AUTAUGAVILLE RADIO, INC., Station WKXN, Facility ID 73194,...

  15. 76 FR 2382 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-13

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change the community of license: Educational Radio for the Public of the New Millennium, Station...

  16. 75 FR 66098 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-27

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change the community of license: GRACE PUBLIC RADIO, Station KFKB, Facility ID 174471,...

  17. 76 FR 31961 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-02

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., AZ, To APACHE JUNCTION, AZ; LA NUEVA CADENA RADIO LUZ, INC., Station KLIT, Facility ID 86722,...

  18. 75 FR 1621 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-12

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change... ELDON, MO, To ST. THOMAS, MO; COX RADIO, INC., Station WALR-FM, Facility ID 48728, BPH-20091124ABA,...

  19. 78 FR 9915 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-12

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., From GOSHEN, AL, To BRANTLEY, AL; AZALEA RADIO CORPORATION, Station NEW, Facility ID 183371,...

  20. 77 FR 8869 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-15

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., BMPED-20120131ALI, From RIDGEVILLE, SC, To ST. GEORGE, SC; RADIO LICENSE HOLDING II, LLC, Station...

  1. 77 FR 45352 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-31

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change...-20120530AFQ, From ROCKY MOUNT, NC, To ELM CITY, NC; SIERRA RADIO, INC., Station KVXX, Facility ID 31618,...

  2. 76 FR 72705 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-25

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change... 90498, BPED-20111103AGS, From LOWELL, IN, To WANATAH, IN; RADIO LICENSE HOLDING CBC, LLC, Station...

  3. 77 FR 24954 - Radio Broadcasting Services; AM or FM Proposals to Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-26

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals to Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change... 17227, BPH-20120327ALB, From HUDSON, IA, To EVANSDALE; HOG RADIO, INC., Station KLYR-FM, Facility...

  4. 76 FR 22704 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-04-22

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., BMPED-20110302ABD, From DANBURY, NC, To MADISON, NC; COX RADIO, INC., Station WHIO-FM, Facility ID...

  5. 77 FR 75434 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-20

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change... ABERDEEN, WA; MCC RADIO, LLC, Station KDUX-FM, Facility ID 52676, BPH-20121114AGF, From ABERDEEN, WA,...

  6. 77 FR 66839 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License AGENCY: Federal Communications Commission. ACTION: Notice. ] SUMMARY: The following applicants filed AM or FM proposals to change... MCCALL, ID, To HUNTINGTON, OR; GATEWAY RADIO WORKS, INC., Station WKYN, Facility ID 23345,...

  7. 78 FR 69086 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-18

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change the community of license: CBS RADIO ANNAPOLIS LLC, Station WLZL, Facility ID 20983,...

  8. Computer simulation and performance assessment of the packet-data service of the Aeronautical Mobile Satellite Service (AMSS)

    NASA Technical Reports Server (NTRS)

    Ferzali, Wassim; Zacharakis, Vassilis; Upadhyay, Triveni; Weed, Dennis; Burke, Gregory

    1995-01-01

    The ICAO Aeronautical Mobile Communications Panel (AMCP) completed the drafting of the Aeronautical Mobile Satellite Service (AMSS) Standards and Recommended Practices (SARP's) and the associated Guidance Material and submitted these documents to ICAO Air Navigation Commission (ANC) for ratification in May 1994. This effort, encompassed an extensive, multi-national SARP's validation. As part of this activity, the US Federal Aviation Administration (FAA) sponsored an effort to validate the SARP's via computer simulation. This paper provides a description of this effort. Specifically, it describes: (1) the approach selected for the creation of a high-fidelity AMSS computer model; (2) the test traffic generation scenarios; and (3) the resultant AMSS performance assessment. More recently, the AMSS computer model was also used to provide AMSS performance statistics in support of the RTCA standardization activities. This paper describes this effort as well.

  9. 78 FR 56170 - Radio Broadcasting Services; Magnolia, Arkansas; and Oil City, Louisiana

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-12

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Magnolia, Arkansas; and Oil City, Louisiana AGENCY: Federal Communications Commission. ACTION: Final rule; denial of application for review. SUMMARY: In...

  10. 47 CFR 95.401 - (CB Rule 1) What are the Citizens Band Radio Services?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... for personal or business activities of the general public. The CB Radio Service may also be used for... service providing auditory assistance to persons with disabilities, persons who require language... functions involving implanted and body-worn medical devices. The rules for this service are contained...

  11. A Media Mix Test of Paid Radio Advertising for Armed Services Recruitment. Volume II.

    DTIC Science & Technology

    1976-05-01

    This was a test of the effectiveness of paid radio recruiting advertising . The four active military services (Army, Navy, Air Force, Marine Corps...service, awareness and knowledge of specific programs and benefits offered by individual services and awareness of armed forces advertising . (Author)

  12. 77 FR 20555 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-05

    ... existing FM radio service,'' the Commission adopted separation requirements for LPFM stations operating on... channel FM station that broadcasts a radio reading service via a subcarrier frequency. 14. The Commission..., while the Commission did not delete the protections specific to FM stations providing radio...

  13. 76 FR 57923 - Establishment of Rules and Policies for the Satellite Digital Audio Radio Service in the 2310...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-19

    ... COMMISSION 47 CFR Part 25 Establishment of Rules and Policies for the Satellite Digital Audio Radio Service... requirements contained in the Satellite Digital Audio Radio Service (SDARS) Second Report and Order. The... document to announce the effective date of these rule sections. See Satellite Digital Audio Radio...

  14. Space radio services and WARC-MOB-87

    NASA Astrophysics Data System (ADS)

    Withers, D. J.

    1988-03-01

    A recent conference of the ITU has agreed upon worldwide frequency allocations near 1600 MHz for communication by satellite with mobile stations on land, and has permitted the use of some aeronautical mobile-satellite frequency bands for passengers' in-flight telephone calls to the ground. Frequencies for systems for locating mobile stations by radio, using satellites, were allocated.

  15. Extensible packet processing architecture

    DOEpatents

    Robertson, Perry J.; Hamlet, Jason R.; Pierson, Lyndon G.; Olsberg, Ronald R.; Chun, Guy D.

    2013-08-20

    A technique for distributed packet processing includes sequentially passing packets associated with packet flows between a plurality of processing engines along a flow through data bus linking the plurality of processing engines in series. At least one packet within a given packet flow is marked by a given processing engine to signify by the given processing engine to the other processing engines that the given processing engine has claimed the given packet flow for processing. A processing function is applied to each of the packet flows within the processing engines and the processed packets are output on a time-shared, arbitered data bus coupled to the plurality of processing engines.

  16. Radio Information Services for the Print Handicapped; a Handbook for Local Use.

    ERIC Educational Resources Information Center

    Holt, Samuel C. O., Ed.

    This handbook discusses radio services delivered to the blind and to other individuals with restricted access to print materials. It consists of four sections: management issues, including planning and finance; programing and outreach services, including recruitment and utilization of volunteers; and technical considerations for using the…

  17. Analysis of QoS Requirements for e-Health Services and Mapping to Evolved Packet System QoS Classes

    PubMed Central

    Skorin-Kapov, Lea; Matijasevic, Maja

    2010-01-01

    E-Health services comprise a broad range of healthcare services delivered by using information and communication technology. In order to support existing as well as emerging e-Health services over converged next generation network (NGN) architectures, there is a need for network QoS control mechanisms that meet the often stringent requirements of such services. In this paper, we evaluate the QoS support for e-Health services in the context of the Evolved Packet System (EPS), specified by the Third Generation Partnership Project (3GPP) as a multi-access all-IP NGN. We classify heterogeneous e-Health services based on context and network QoS requirements and propose a mapping to existing 3GPP QoS Class Identifiers (QCIs) that serve as a basis for the class-based QoS concept of the EPS. The proposed mapping aims to provide network operators with guidelines for meeting heterogeneous e-Health service requirements. As an example, we present the QoS requirements for a prototype e-Health service supporting tele-consultation between a patient and a doctor and illustrate the use of the proposed mapping to QCIs in standardized QoS control procedures. PMID:20976301

  18. Estimating the size of a radio quiet zone for the radio astronomy service

    NASA Astrophysics Data System (ADS)

    Peng, Bo; Han, Wenjun

    2009-12-01

    The size of a radio quiet zone (RQZ) is largely determined by transmission losses of interfering signals, which can be divided into free space loss and diffraction loss. The free space loss is dominant. The diffraction loss presented in this paper is described as unified smooth spherical and knife edge diffractions, which is a function of minimum path clearance. We present a complete method to calculate the minimum path clearance. The cumulative distribution of the lapse rate of refractivity ( g n ), between the earth surface and 1 km above, is studied by using Chinese radio climate data. Because the size of an RQZ is proportional to g n , the cumulative distribution of g n can be used as an approximation for the size of the RQZ. When interference originates from mobile communication or television transmissions at a frequency of 408 MHz, and overline {g_n } is 40 N/km, where the refractivity N=left( {n-1} right) × 10^6, the size of the RQZ would be 180 km for a mobile source or 210 km for a television source, with a probability in the range of 15-100% in different months and for different stations. When speaking of the size of an RQZ, the radius in the case of a circular zone is implied. It results that a size of an RQZ is mainly influenced by transmission loss rather than effective radiated power. In the case where the distance between an interfering source and a radio astronomical observatory is about 100 km, at a frequency of 408 MHz, the allowable effective radiated power of the interfering source should be less than -30 dBW with a probability of about 85% for overline {g_n } equals 40 N/km, or -42 dBW with a probability less than 1 % for overline {g_n } equals 80 N/km.

  19. Precise Interval Timer for Software Defined Radio

    NASA Technical Reports Server (NTRS)

    Pozhidaev, Aleksey (Inventor)

    2014-01-01

    A precise digital fractional interval timer for software defined radios which vary their waveform on a packet-by-packet basis. The timer allows for variable length in the preamble of the RF packet and allows to adjust boundaries of the TDMA (Time Division Multiple Access) Slots of the receiver of an SDR based on the reception of the RF packet of interest.

  20. Bridging Early Services: Interagency Transition Planning Community Transition Workshop. Facilitator's Manual, Participant's Manual, [and] Preconference Packet. Bridging Early Services Transition Project.

    ERIC Educational Resources Information Center

    Rosenkoetter, Sharon; Shotts, Cynthia

    This manual is a guide for facilitating a 3-hour community interagency planning workshop on the transition of young children with disabilities and is comprised of a facilitator's manual, a participant's manual, and a preconference packet. The facilitator's manual provides a listing of necessary materials, a general workshop process checklist, a…

  1. Reliable Location-Based Services from Radio Navigation Systems

    PubMed Central

    Qiu, Di; Boneh, Dan; Lo, Sherman; Enge, Per

    2010-01-01

    Loran is a radio-based navigation system originally designed for naval applications. We show that Loran-C’s high-power and high repeatable accuracy are fantastic for security applications. First, we show how to derive a precise location tag—with a sensitivity of about 20 meters—that is difficult to project to an exact location. A device can use our location tag to block or allow certain actions, without knowing its precise location. To ensure that our tag is reproducible we make use of fuzzy extractors, a mechanism originally designed for biometric authentication. We build a fuzzy extractor specifically designed for radio-type errors and give experimental evidence to show its effectiveness. Second, we show that our location tag is difficult to predict from a distance. For example, an observer cannot predict the location tag inside a guarded data center from a few hundreds of meters away. As an application, consider a location-aware disk drive that will only work inside the data center. An attacker who steals the device and is capable of spoofing Loran-C signals, still cannot make the device work since he does not know what location tag to spoof. We provide experimental data supporting our unpredictability claim. PMID:22163532

  2. Reliable location-based services from radio navigation systems.

    PubMed

    Qiu, Di; Boneh, Dan; Lo, Sherman; Enge, Per

    2010-01-01

    Loran is a radio-based navigation system originally designed for naval applications. We show that Loran-C's high-power and high repeatable accuracy are fantastic for security applications. First, we show how to derive a precise location tag--with a sensitivity of about 20 meters--that is difficult to project to an exact location. A device can use our location tag to block or allow certain actions, without knowing its precise location. To ensure that our tag is reproducible we make use of fuzzy extractors, a mechanism originally designed for biometric authentication. We build a fuzzy extractor specifically designed for radio-type errors and give experimental evidence to show its effectiveness. Second, we show that our location tag is difficult to predict from a distance. For example, an observer cannot predict the location tag inside a guarded data center from a few hundreds of meters away. As an application, consider a location-aware disk drive that will only work inside the data center. An attacker who steals the device and is capable of spoofing Loran-C signals, still cannot make the device work since he does not know what location tag to spoof. We provide experimental data supporting our unpredictability claim.

  3. Effect of the 24 September 2011 solar radio burst on precise point positioning service

    NASA Astrophysics Data System (ADS)

    Sreeja, V.; Aquino, M.; Jong, Kees; Visser, Hans

    2014-03-01

    An intense solar radio burst occurred on 24 September 2011, which affected the tracking of Global Navigation Satellite Systems' (GNSS) signals by receivers located in the sunlit hemisphere of the Earth. This manuscript presents for the first time the impacts of this radio burst on the availability of Fugro's real-time precise point positioning service for GNSS receivers and on the quality of the L band data link used to broadcast this service. During the peak of the radio burst (12:50-13:20 UT), a reduction in the L band signal-to-noise ratio (SNR) is observed. For some receiver locations, a reset in the position filter is observed, which can be either due to the reduction in the L band SNR or the reduction in the number of tracked GNSS satellites. This reset in the position filter is accompanied by degradation in the positioning accuracy, which is also discussed herein.

  4. 47 CFR 27.1255 - Relocation Criteria for Broadband Radio Service Licensees in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION (CONTINUED) COMMON CARRIER SERVICES MISCELLANEOUS WIRELESS COMMUNICATIONS SERVICES Broadband Radio... co-channel to the 2150-2160/62 MHz band, must relocate any incumbent BRS system that is within...

  5. 43 CFR 2806.35 - How will BLM calculate rent for private mobile radio service (PMRS), internal microwave, and...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... mobile radio service (PMRS), internal microwave, and âotherâ category uses? 2806.35 Section 2806.35... mobile radio service (PMRS), internal microwave, and “other” category uses? If an entity engaged in a PMRS, internal microwave, or “other” use is: (a) Using space in a facility owned by either a...

  6. 43 CFR 2806.35 - How will BLM calculate rent for private mobile radio service (PMRS), internal microwave, and...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... mobile radio service (PMRS), internal microwave, and âotherâ category uses? 2806.35 Section 2806.35... mobile radio service (PMRS), internal microwave, and “other” category uses? If an entity engaged in a PMRS, internal microwave, or “other” use is: (a) Using space in a facility owned by either a...

  7. 43 CFR 2806.35 - How will BLM calculate rent for private mobile radio service (PMRS), internal microwave, and...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... mobile radio service (PMRS), internal microwave, and âotherâ category uses? 2806.35 Section 2806.35... MANAGEMENT ACT Rents Communication Site Rights-Of-Way § 2806.35 How will BLM calculate rent for private mobile radio service (PMRS), internal microwave, and “other” category uses? If an entity engaged in...

  8. 78 FR 23854 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-23

    ... COMMISSION 47 CFR Part 73 Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility Rules for Low Power FM Stations AGENCY: Federal Communications Commission. ACTION: Final rule... with the Commission's Local Community Radio Act of 2010; Revision of Service and Eligibility Rules...

  9. 43 CFR 2806.35 - How will BLM calculate rent for private mobile radio service (PMRS), internal microwave, and...

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... mobile radio service (PMRS), internal microwave, and âotherâ category uses? 2806.35 Section 2806.35... mobile radio service (PMRS), internal microwave, and “other” category uses? If an entity engaged in a PMRS, internal microwave, or “other” use is: (a) Using space in a facility owned by either a...

  10. 77 FR 66743 - Radio Broadcasting Services; Crowell, Knox City, Quanah, and Rule, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Crowell, Knox City, Quanah, and Rule, TX AGENCY... of Allotments by substituting Channel 293A for vacant Channel 291A at Knox City, Texas; Channel 288C2.... Channel 293A can be allotted to Knox City, Texas at reference coordinates 33-25-55 NL and 99-47-43 WL,...

  11. Television Sweep Circuits and Picture Signal Path; Radio and Television Service--Advanced: 9787.02.

    ERIC Educational Resources Information Center

    Dade County Public Schools, Miami, FL.

    This course outline is designed to give students a working knowledge of radio and television theory and servicing techniques. Course content includes goals, specific block objectives, resistance-capacitance circuit characteristics, sawtooth generators sawtooth generator control and production of scanning waveforms, deflection systems, composite…

  12. 76 FR 50732 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-16

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., LLC, Station KOMO-FM, Facility ID 51167, BMPH-20110630AGT, From OAKVILLE, WA, To BELFAIR,...

  13. 75 FR 31437 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-03

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., BPH-20100406AAZ, From SOUTH BEND, WA, To COSMOPOLIS, WA; MOUNT WILSON FM BROADCASTERS, INC.,...

  14. 77 FR 33217 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-05

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to...

  15. 75 FR 36393 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-25

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to...

  16. 75 FR 74732 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-01

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., BPH-20101108AAZ, from Elizabethtown, NC, to Rennert, NC; Entravision Holdings, LLC, Station...

  17. 77 FR 18815 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-03-28

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to...

  18. 75 FR 47596 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-06

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., BMPED- 20100707GWD, From SALIDA, CO, To SNOWMASS VILLAGE, CO; DELTA MEDIA CORPORATION, Station...

  19. 75 FR 9797 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-04

    ... COMMISSION 47 CFR Part 73 Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment..., and to streamline processing of AM and FM auction applications. DATES: Effective April 5, 2010. FOR...)), when proposing FM allotments, and when filing AM and noncommercial educational (NCE) FM filing...

  20. 75 FR 20597 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-20

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., From RESERVE, NM, To CONCHO, AZ; DAILEY CORPORATION, Station WETZ-FM, Facility ID 18534,...

  1. 76 FR 7848 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-11

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License Correction In notice document 2011-2764 appearing on pages 6788-6789 in the issue of Tuesday, February 8, 2011,...

  2. 77 FR 4817 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-31

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to...

  3. 75 FR 51812 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-23

    ...] [FR Doc No: 2010-20912] FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM.... SUMMARY: The following applicants filed AM or FM proposals to change the community of license: BRYAN... STATION, TX; CUMULUS LICENSING LLC, Station KNRQ-FM, Facility ID 12501, BMPH-20100805AKO, From...

  4. 77 FR 57086 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-17

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License. AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change the community of license: ALEXANDRA COMMUNICATIONS, INC., Station KRKZ- FM, Facility...

  5. 76 FR 9249 - Radio Broadcasting Services; Enfield, NH; Hartford, VT; Keeseville and Morrisonville, NY; White...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-17

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Enfield, NH; Hartford, VT; Keeseville and... reallotting FM Channel 231A to Morrisonville, New York, and reinstating the allotment of Channel 231A at... document also affirms the Report and Order in all other respects. Finally, the document modifies the...

  6. 78 FR 13670 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-28

    ... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to...

  7. 75 FR 13761 - Radio Broadcasting Services; AM or FM Proposals To Change the Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-23

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change the Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change... BROADCASTING CORPORATION, Station KFFF-FM, Facility ID 6417, BPH-20100126AGR, From BOONE, IA, To JOHNSTON,...

  8. 75 FR 63475 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-15

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM proposals to change..., From CRAIGSVILLE, WV, To WEBSTER SPRINGS, WV; ENTRAVISION HOLDINGS, LLC, Station KVVA-FM, Facility...

  9. 78 FR 48625 - Radio Broadcasting Services; Centerville, Lovelady, Midway, and Oakwood, Texas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-09

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Centerville, Lovelady, Midway, and Oakwood, Texas... Petition for Rule Making filed by Katherine Pyeatt by allotting alternate FM Channel 251A at Midway, Texas... filed counterproposal in an FM allotment proceeding may be amended to cure a conflict with a...

  10. 76 FR 6788 - Radio Broadcasting Services; AM or FM Proposals To Change The Community of License.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-08

    ... COMMISSION Radio Broadcasting Services; AM or FM Proposals To Change The Community of License. AGENCY: Federal Communications Commission. ACTION: Notice. SUMMARY: The following applicants filed AM or FM...-FM, Facility ID 32386, BPH-20101222ABO, From GREAT FALLS, MT, To HIGHWOOD, MT; THE MONTANA...

  11. Private land mobile radio services; bio-medical telemetry operations--Federal Communications Commission. Final rule.

    PubMed

    1981-04-20

    This action changes rules in the Special Emergency Radio Service to permit the limited use of bio-medical telemetry systems on certain medical services VHF frequencies. The operation is to be allowed only beyond fifty miles from the center of urbanized areas of 600,000 or more population (U.S. Census of 1970). The bio-medical telemetry system is used to send electrocardiograms from patients to hospitals.

  12. An economics systems analysis of land mobile radio telephone services

    NASA Technical Reports Server (NTRS)

    Leroy, B. E.; Stevenson, S. M.

    1980-01-01

    The economic interaction of the terrestrial and satellite systems is considered. Parametric equations are formulated to allow examination of necessary user thresholds and growth rates as a function of system costs. Conversely, first order allowable systems costs are found as a function of user thresholds and growth rates. Transitions between satellite and terrestrial service systems are examined. User growth rate density (user/year/sq km) is shown to be a key parameter in the analysis of systems compatibility. The concept of system design matching the price/demand curves is introduced and examples are given. The role of satellite systems is critically examined and the economic conditions necessary for the introduction of satellite service are identified.

  13. A Study of Quality of Service Communication for High-Speed Packet-Switching Computer Sub-Networks

    NASA Technical Reports Server (NTRS)

    Cui, Zhenqian

    1999-01-01

    With the development of high-speed networking technology, computer networks, including local-area networks (LANs), wide-area networks (WANs) and the Internet, are extending their traditional roles of carrying computer data. They are being used for Internet telephony, multimedia applications such as conferencing and video on demand, distributed simulations, and other real-time applications. LANs are even used for distributed real-time process control and computing as a cost-effective approach. Differing from traditional data transfer, these new classes of high-speed network applications (video, audio, real-time process control, and others) are delay sensitive. The usefulness of data depends not only on the correctness of received data, but also the time that data are received. In other words, these new classes of applications require networks to provide guaranteed services or quality of service (QoS). Quality of service can be defined by a set of parameters and reflects a user's expectation about the underlying network's behavior. Traditionally, distinct services are provided by different kinds of networks. Voice services are provided by telephone networks, video services are provided by cable networks, and data transfer services are provided by computer networks. A single network providing different services is called an integrated-services network.

  14. Packet QoS level classifier based on optical binary priority comparison.

    PubMed

    Song, Seoksu; Nguyen, Vancanh; Park, Jinwoo

    2010-07-19

    Next generation High-Speed optical packet switching networks require components capable of classifying incoming packet into the appropriate priority queue according to the service class of the packet. For the first time, we proposed an all-optical packet QoS (Quality of Service) level classifier employing a sequential binary packet priority comparator, which is implemented using the SOA-based optical logic gates. The performance of the optical binary packet priority comparator was verified experimentally at 1 Gbit/s showing that the proposed scheme can operate higher data rates. These packet level classifier structures are attractive for all-optical network and applications.

  15. 77 FR 73545 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-11

    ... for FM translators, both to rebroadcast AM stations and to rebroadcast HD radio streams. However, we... No. 99-25; FCC 12-144] Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility Rules for Low Power FM Stations AGENCY: Federal Communications Commission....

  16. 77 FR 20756 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-06

    ... COMMISSION 47 CFR Part 73 Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility Rules for Low Power FM Stations AGENCY: Federal Communications Commission. ACTION: Proposed rule... provisions of the Local Community Radio Act of 2010 (``LCRA'') that are not already the subject of...

  17. 78 FR 67310 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-12

    ... COMMISSION 47 CFR Part 73 Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility Rules for Low Power FM Stations AGENCY: Federal Communications Commission. ACTION: Final rule... Communications Commission (Commission) grants in part and denies in part Prometheus Radio Project's Petition...

  18. 47 CFR 25.214 - Technical requirements for space stations in the satellite digital audio radio service and...

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... the satellite digital audio radio service and associated terrestrial repeaters. 25.214 Section 25.214... Technical Standards § 25.214 Technical requirements for space stations in the satellite digital audio radio.... The term “frequency assignment” refers to the authorization given by the Commission for a...

  19. 76 FR 7847 - Glenn A. Baxter, Application To Renew License for Amateur Radio Service Station K1MAN

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-11

    ... interfering with radio communications; (b) To determine whether Glenn A. Baxter willfully and/or repeatedly... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION Glenn A. Baxter, Application To Renew License for Amateur Radio Service Station K1MAN...

  20. Cascaded neural networks for sequenced propagation estimation, multiuser detection, and adaptive radio resource control of third-generation wireless networks for multimedia services

    NASA Astrophysics Data System (ADS)

    Hortos, William S.

    1999-03-01

    A hybrid neural network approach is presented to estimate radio propagation characteristics and multiuser interference and to evaluate their combined impact on throughput, latency and information loss in third-generation (3G) wireless networks. The latter three performance parameters influence the quality of service (QoS) for multimedia services under consideration for 3G networks. These networks, based on a hierarchical architecture of overlaying macrocells on top of micro- and picocells, are planned to operate in mobile urban and indoor environments with service demands emanating from circuit-switched, packet-switched and satellite-based traffic sources. Candidate radio interfaces for these networks employ a form of wideband CDMA in 5-MHz and wider-bandwidth channels, with possible asynchronous operation of the mobile subscribers. The proposed neural network (NN) architecture allocates network resources to optimize QoS metrics. Parameters of the radio propagation channel are estimated, followed by control of an adaptive antenna array at the base station to minimize interference, and then joint multiuser detection is performed at the base station receiver. These adaptive processing stages are implemented as a sequence of NN techniques that provide their estimates as inputs to a final- stage Kohonen self-organizing feature map (SOFM). The SOFM optimizes the allocation of available network resources to satisfy QoS requirements for variable-rate voice, data and video services. As the first stage of the sequence, a modified feed-forward multilayer perceptron NN is trained on the pilot signals of the mobile subscribers to estimate the parameters of shadowing, multipath fading and delays on the uplinks. A recurrent NN (RNN) forms the second stage to control base stations' adaptive antenna arrays to minimize intra-cell interference. The third stage is based on a Hopfield NN (HNN), modified to detect multiple users on the uplink radio channels to mitigate multiaccess

  1. 47 CFR 25.144 - Licensing provisions for the 2.3 GHz satellite digital audio radio service.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 2 2010-10-01 2010-10-01 false Licensing provisions for the 2.3 GHz satellite... (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space Stations § 25.144 Licensing provisions for the 2.3 GHz satellite digital audio radio service. (a)...

  2. Low-Cost Packet Radio Decoders

    DTIC Science & Technology

    1982-05-30

    Continuous Mode Decoding Interface Proceedure The continuous mode decoding interface is varies, depending on the decoder mode, BPSK, QPSK, and OQPSK . All the...respectively. In both cases, the output clock is output at DDENB and the data is output at DDATA. 38 In OQPSK mode, the decoder has the capability of...ADDRESS SIZE 2 States 10 BPSK (ab) (bc) 0 1024 2 States 01 QPSK (ab) (Ba) 2 States Single 4096 00 Clock (a’b) (6a) OQPSK 0 128 11 BLOCK None 1 256

  3. A Routing Protocol for Packet Radio Networks

    DTIC Science & Technology

    1995-01-01

    table of node K is a matrix containing, for each destination L and each neighbor of K (say M ), the distance to L ( NEOPRQ ) and the predecessor ( S OP Q...identifier T The distance to the destination ( N OP ) T The predecessor of the shortest path chosen toward L ( S OP ) T The successor ( U OP ) of the shortest...P and the predecessor is updated as S OP À ¾ S Q P . Thus, a node can determine whether or not an update received from M affects its other distance

  4. Evaluation of solar radio bursts' effect on GPS receiver signal tracking within International GPS Service network

    NASA Astrophysics Data System (ADS)

    Chen, Zhiyu; Gao, Yang; Liu, Zhizhao

    2005-06-01

    The direct interference from solar radio bursts (SRB) has not usually been considered as a potential threat to global positioning system (GPS) signal tracking, since the flux densities of most bursts are below 40,000 solar flux units (sfu), a threat threshold to GPS L1 frequency proposed by Klobuchar et al. (1999). Recent analysis indicated that a much lower threshold should be adopted for codeless or semicodeless dual-frequency GPS receivers. In this investigation, severe signal corruptions were found at dayside International GPS Service GPS receiver stations during a large solar radio burst that accompanied the super flare of 28 October 2003. Almost no GPS L2 signals were tracked during the solar flux peak time for areas near the subsolar point. Correlation analysis was performed between the rate of loss of lock on GPS L2 frequency and solar radio flux density at different bands, and a correlation index as high as 0.75 is revealed in the 1415 MHz solar radiation band, which is located between the two GPS operating frequencies L2 (1227.60 MHz) and L1 (1575.42 MHz). The correlation analysis indicates that GPS signal losses of lock were primarily caused by microwave in-band interference and that the threat threshold of SRB effects on the GPS system should be re-evaluated, since the flux density of the burst at 1415 MHz was just 4,000-12,000 sfu, which is far below the previously proposed threat threshold. The signal-tracking performance of different types of GPS receivers during such a super flare event is also presented.

  5. Experimental demonstration of multi-dimensional resources integration for service provisioning in cloud radio over fiber network

    NASA Astrophysics Data System (ADS)

    Yang, Hui; Zhang, Jie; Ji, Yuefeng; He, Yongqi; Lee, Young

    2016-07-01

    Cloud radio access network (C-RAN) becomes a promising scenario to accommodate high-performance services with ubiquitous user coverage and real-time cloud computing in 5G area. However, the radio network, optical network and processing unit cloud have been decoupled from each other, so that their resources are controlled independently. Traditional architecture cannot implement the resource optimization and scheduling for the high-level service guarantee due to the communication obstacle among them with the growing number of mobile internet users. In this paper, we report a study on multi-dimensional resources integration (MDRI) for service provisioning in cloud radio over fiber network (C-RoFN). A resources integrated provisioning (RIP) scheme using an auxiliary graph is introduced based on the proposed architecture. The MDRI can enhance the responsiveness to dynamic end-to-end user demands and globally optimize radio frequency, optical network and processing resources effectively to maximize radio coverage. The feasibility of the proposed architecture is experimentally verified on OpenFlow-based enhanced SDN testbed. The performance of RIP scheme under heavy traffic load scenario is also quantitatively evaluated to demonstrate the efficiency of the proposal based on MDRI architecture in terms of resource utilization, path blocking probability, network cost and path provisioning latency, compared with other provisioning schemes.

  6. Experimental demonstration of multi-dimensional resources integration for service provisioning in cloud radio over fiber network

    PubMed Central

    Yang, Hui; Zhang, Jie; Ji, Yuefeng; He, Yongqi; Lee, Young

    2016-01-01

    Cloud radio access network (C-RAN) becomes a promising scenario to accommodate high-performance services with ubiquitous user coverage and real-time cloud computing in 5G area. However, the radio network, optical network and processing unit cloud have been decoupled from each other, so that their resources are controlled independently. Traditional architecture cannot implement the resource optimization and scheduling for the high-level service guarantee due to the communication obstacle among them with the growing number of mobile internet users. In this paper, we report a study on multi-dimensional resources integration (MDRI) for service provisioning in cloud radio over fiber network (C-RoFN). A resources integrated provisioning (RIP) scheme using an auxiliary graph is introduced based on the proposed architecture. The MDRI can enhance the responsiveness to dynamic end-to-end user demands and globally optimize radio frequency, optical network and processing resources effectively to maximize radio coverage. The feasibility of the proposed architecture is experimentally verified on OpenFlow-based enhanced SDN testbed. The performance of RIP scheme under heavy traffic load scenario is also quantitatively evaluated to demonstrate the efficiency of the proposal based on MDRI architecture in terms of resource utilization, path blocking probability, network cost and path provisioning latency, compared with other provisioning schemes. PMID:27465296

  7. 47 CFR 25.214 - Technical requirements for space stations in the Satellite Digital Audio Radio Service and...

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 2 2013-10-01 2013-10-01 false Technical requirements for space stations in... Technical Standards § 25.214 Technical requirements for space stations in the Satellite Digital Audio Radio... the purpose of its use by one or more terrestrial or space radiocommunication services under...

  8. 78 FR 73109 - Radio Broadcasting Services; Benjamin and Cisco, TX; De Beque, CO; Port Lions, AK; Rule and...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-05

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Benjamin and Cisco, TX; De Beque, CO; Port Lions, AK... Commission amends the Table of FM Allotments by removing Channel 221C0 at Port Lions, Alaska; Channel 247C3... two or more FM auctions. No bids were entered for these allotments in Auction 94. It is...

  9. 78 FR 42036 - Radio Broadcasting Services; Port Lions, AK, De Beque, CO, Benjamin, Cisco, Rule, and Shamrock, TX

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-15

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Port Lions, AK, De Beque, CO, Benjamin, Cisco, Rule...-held permits that have been offered in two FM auctions. No bids were entered for these allotments in the recently completed FM Auction 94 and these allotments are now considered unsold permits....

  10. 77 FR 42672 - Radio Broadcasting Services; Alberton, MT; Crystal Falls, MI; Saint Paul, AR; and Waitsburg, WA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-20

    ... COMMISSION 47 CFR Part 73 Radio Broadcasting Services; Alberton, MT; Crystal Falls, MI; Saint Paul, AR; and... allotments from the FM Table, because there were no bona fide expressions of interest filed to retain these... communities for new FM allotments or upgrades of existing stations. We conclude that the deletion of...

  11. 77 FR 2242 - Radio Broadcasting Services; Ehrenberg, First Mesa, Kachina Village, Wickenburg, and Williams, AZ...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-17

    ... COMMISSION 47 CFR Part 73 [MB Docket No. 08-85; RM-11427, RM-11517, RM-11518, RM-11519; DA 11- 2059] Radio... dismisses a Petition for Rule Making filed by Michael Cusinato proposing the allotment of FM Channel 287B1... Radio, Inc. (RM-11517) and Univision Radio License Corporation (RM-11518), which are mutually...

  12. 77 FR 2241 - Radio Broadcasting Services; Ehrenberg, First Mesa, Kachina Village, Wickenburg, and Williams, AZ...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-17

    ..., and Williams, AZ; and Application of Univision Radio License Corporation, KHOV-FM, Wickenburg, AZ... by Rocket Radio, Inc., proposes the allotment of FM Channel 287C2 at Williams, Arizona, as the... and hybrid application, filed by Univision Radio License Corporation, licensee of Station...

  13. Wireless Roadside Inspection Phase II Tennessee Commercial Mobile Radio Services Pilot Test Final Report

    SciTech Connect

    Franzese, Oscar; Lascurain, Mary Beth; Capps, Gary J; Siekmann, Adam

    2011-05-01

    The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (WRI) Program is researching the feasibility and value of electronically assessing truck and bus driver and vehicle safety at least 25 times more often than is possible using only roadside physical inspections. The WRI program is evaluating the potential benefits to both the motor carrier industry and to government. These potential benefits include reduction in accidents, fatalities and injuries on our highways and keeping safe and legal drivers and vehicles moving on the highways. WRI Pilot tests were conducted to prototype, test and demonstrate the feasibility and benefits of electronically collecting safety data message sets from in-service commercial vehicles and performing wireless roadside inspections using three different communication methods. This report summarizes the design, conduct and results of the Tennessee CMRS WRI Pilot Test. The purpose of this Pilot test was to demonstrate the implementation of commercial mobile radio services to electronically request and collect safety data message sets from a limited number of commercial vehicles operating in Tennessee. The results of this test have been used in conjunction with the results of the complimentary pilot tests to support an overall assessment of the feasibility and benefits of WRI in enhancing motor carrier safety (reduction in accidents) due to increased compliance (change in motor carrier and driver behavior) caused by conducting frequent safety inspections electronically, at highway speeds, without delay or need to divert into a weigh station

  14. Packet-Based Protocol Efficiency for Aeronautical and Satellite Communications

    NASA Technical Reports Server (NTRS)

    Carek, David A.

    2005-01-01

    This paper examines the relation between bit error ratios and the effective link efficiency when transporting data with a packet-based protocol. Relations are developed to quantify the impact of a protocol s packet size and header size relative to the bit error ratio of the underlying link. These relations are examined in the context of radio transmissions that exhibit variable error conditions, such as those used in satellite, aeronautical, and other wireless networks. A comparison of two packet sizing methodologies is presented. From these relations, the true ability of a link to deliver user data, or information, is determined. Relations are developed to calculate the optimal protocol packet size forgiven link error characteristics. These relations could be useful in future research for developing an adaptive protocol layer. They can also be used for sizing protocols in the design of static links, where bit error ratios have small variability.

  15. Wireless Avionics Packet to Support Fault Tolerance for Flight Applications

    NASA Technical Reports Server (NTRS)

    Block, Gary L.; Whitaker, William D.; Dillon, James W.; Lux, James P.; Ahmad, Mohammad

    2009-01-01

    In this protocol and packet format, data traffic is monitored by all network interfaces to determine the health of transmitter and subsystems. When failures are detected, the network inter face applies its recover y policies to provide continued service despite the presence of faults. The protocol, packet format, and inter face are independent of the data link technology used. The current demonstration system supports both commercial off-the-shelf wireless connections and wired Ethernet connections. Other technologies such as 1553 or serial data links can be used for the network backbone. The Wireless Avionics packet is divided into three parts: a header, a data payload, and a checksum. The header has the following components: magic number, version, quality of service, time to live, sending transceiver, function code, payload length, source Application Data Interface (ADI) address, destination ADI address, sending node address, target node address, and a sequence number. The magic number is used to identify WAV packets, and allows the packet format to be updated in the future. The quality of service field allows routing decisions to be made based on this value and can be used to route critical management data over a dedicated channel. The time to live value is used to discard misrouted packets while the source transceiver is updated at each hop. This information is used to monitor the health of each transceiver in the network. To identify the packet type, the function code is used. Besides having a regular data packet, the system supports diagnostic packets for fault detection and isolation. The payload length specifies the number of data bytes in the payload, and this supports variable-length packets in the network. The source ADI is the address of the originating interface. This can be used by the destination application to identify the originating source of the packet where the address consists of a subnet, subsystem class within the subnet, a subsystem unit

  16. PROGRAMMED LEARNING PACKET.

    ERIC Educational Resources Information Center

    Modern Language Association of America, New York, NY.

    MATERIALS CONCERNING PROGRAMED INSTRUCTION IN FOREIGN LANGUAGES, PUBLISHED FROM 1960 TO 1967, ARE COLLECTED IN THIS PACKET FOR LANGUAGE TEACHERS AND PERSONS INTERESTED IN THE FUTURE USES OF THE LANGUAGE LABORATORY. INCLUDED ARE--(1) "PROGRAMED LEARNING OF A SECOND LANGUAGE" BY HARLAN LANE, (2) "A PRIMER OF PROGRAMED INSTRUCTION IN FOREIGN LANGUAGE…

  17. Amelia Earhart Learning Packet.

    ERIC Educational Resources Information Center

    Civil Air Patrol, Maxwell AFB, AL.

    The feats of individuals who have made history in the aerospace world are often misunderstood and soon ignored or forgotten after the first notoriety has been achieved. Amelia Earhart was selected as the subject for this learning packet because of her brilliant accomplishments on the world of flight, a persistent desire to determine what really…

  18. Hoover Dam Learning Packet.

    ERIC Educational Resources Information Center

    Bureau of Reclamation (Dept. of Interior), Washington, DC.

    This learning packet provides background information about Hoover Dam (Nevada) and the surrounding area. Since the dam was built at the height of the Depression in 1931, people came from all over the country to work on it. Because of Hoover Dam, the Colorado River was controlled for the first time in history and farmers in Nevada, California, and…

  19. Computer Accessibility Technology Packet.

    ERIC Educational Resources Information Center

    Department of Education, Washington, DC.

    This technology information packet includes information about the technical aspects of access to technology, legal obligations concerning technology and individuals with disabilities, and a list of resources for further information and assistance. A question and answer section addresses: barriers to educational technology for students with…

  20. Regulatory policies and procedures for the Domestic Public Land Mobile Radio Service--Federal Communications Commission. Second report and order.

    PubMed

    1982-05-19

    This Order eliminates the requirement that applicants in the Domestic Public Land Mobile Radio Service requesting one initial two-way frequency demonstrate a public need for the proposed service. This action will serve the public interest by making frequencies available for use by the public in a more timely manner, by reducing the costs associated with filing applications and by relieving the staff of an unnecessary processing burden. This action is necessary to speed service to the public and to reduce staff resources necessary to process applications.

  1. High-speed IP packet forwarding over Internet using ATM technology

    NASA Astrophysics Data System (ADS)

    Esaki, Hiroshi

    1995-10-01

    Framework of IP packet delivery with high throughput and small latency using ATM technology in large scaled internets is proposed, while keeping the current subnet model. Router has the mapping functionality between flow-identifier (e.g. in IPv6 header) and VPI/VCI value to forward IP packets cell-by-cell, rather than the conventional packet-by- packet forwarding. By using this cut-thru IP packet forwarding, both resource reservation oriented IP packet flows (i.e. IP packet flow provided by RSVP) and nonresource reservation oriented IP packet flows (i.e. best effort service) experience less packet delivery latency and obtain higher throughput, compared to the conventional hop-by-hop packet forwarding does. In order to perform the cut-thru IP packet forwarding using cell relaying capability in the router, routers exchange the information how the IP packet flows are aggregated into ATM- VCC. This information exchanging is hop-by-hop base, and the cut-thru decision is a matter of every router's local decision. With the hop-by-hop cut-thru IP packet forwarding, soft-state oriented and scalable QoS-ed high speed communication platform can be provided.

  2. Estimate of Interference from the Aeronautical Mobile Services of the Cities of Glendale and Pasadena to Goldstone Radio Astronomy Stations at 4.9 Gigahertz

    NASA Astrophysics Data System (ADS)

    Ho, C.; Sue, M.; Manshadi, F.

    2006-05-01

    The Federal Communications Commission (FCC) recently allocated the 4.9-GHz band to public safety telecommunications services. Radio Astronomy Services (RAS) also has been using this frequency. NASA will primarily use Deep Space Station 28 (DSS 28) at Goldstone, California, for radio astronomy services that are sensitive to radio-frequency interference (RFI). This study is to determine the RFI potential of airborne transmission from two cities to radio astronomy sites in Goldstone. Propagation losses over the terrain between both cities and Goldstone are estimated using the Trans-Horizon Interference Propagation Loss (THIPL) software recently developed at JPL and high-resolution terrain data. The necessary coordination area for protecting the Goldstone radio astronomy station has been defined based on the minimum propagation loss required. Study results and suggestions for modification to the airborne areas proposed by both cities' police departments are presented.

  3. 75 FR 17874 - Digital Audio Broadcasting Systems and Their Impact on the Terrestrial Radio Broadcast Service

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-08

    ... adopts changes in the digital audio broadcasting (DAB) rules to permit FM radio stations to voluntarily... regulatory impediments to FM digital radio's ability to realize its full potential and deliver its promised... of 18 broadcasters that operate over 1200 commercial and noncommercial educational (NCE) FM...

  4. Optical packet switching

    NASA Astrophysics Data System (ADS)

    Shekel, Eyal; Ruschin, Shlomo; Majer, Daniel; Levy, Jeff; Matmon, Guy; Koenigsberg, Lisa; Vecht, Jacob; Geron, Amir; Harlavan, Rotem; Shfaram, Harel; Arbel, Arnon; McDermott, Tom; Brewer, Tony

    2005-02-01

    We report here a scalable, multichassis, 6.3 terabit core router, which utilizes our proprietary optical switch. The router is commercially available and deployed in several customer sites. Our solution combines optical switching with electronic routing. An internal optical packet switching network interconnects the router"s electronic line cards, where routing and buffering functions take place electronically. The system architecture and performance will be described. The optical switch is based on Optical Phased Array (OPA) technology. It is a 64 x 64, fully non-blocking, optical crossbar switch, capable of switching in a fraction of a nanosecond. The basic principles of operation will be explained. Loss and crosstalk results will be presented, as well as the results of BER measurements of a 160 Gbps transmission through one channel. Basic principles of operation and measured results will be presented for the burst-mode-receivers, arbitration algorithm and synchronization. Finally, we will present some of our current research work on a next-generation optical switch. The technological issues we have solved in our internal optical packet network can have broad applicability to any global optical packet network.

  5. 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

    ..., Communications common carriers, Communications equipment, Radio, Telecommunications, Telephone, Television... From the Federal Register Online via the Government Publishing Office FEDERAL COMMUNICATIONS COMMISSION 47 CFR Parts 12 and 90 Redundancy of Communications Systems: Backup Power Private Land...

  6. Controlled Quantum Packets

    NASA Technical Reports Server (NTRS)

    DeMartino, Salvatore; DeSiena, Silvio

    1996-01-01

    We look at time evolution of a physical system from the point of view of dynamical control theory. Normally we solve motion equation with a given external potential and we obtain time evolution. Standard examples are the trajectories in classical mechanics or the wave functions in Quantum Mechanics. In the control theory, we have the configurational variables of a physical system, we choose a velocity field and with a suited strategy we force the physical system to have a well defined evolution. The evolution of the system is the 'premium' that the controller receives if he has adopted the right strategy. The strategy is given by well suited laboratory devices. The control mechanisms are in many cases non linear; it is necessary, namely, a feedback mechanism to retain in time the selected evolution. Our aim is to introduce a scheme to obtain Quantum wave packets by control theory. The program is to choose the characteristics of a packet, that is, the equation of evolution for its centre and a controlled dispersion, and to give a building scheme from some initial state (for example a solution of stationary Schroedinger equation). It seems natural in this view to use stochastic approach to Quantum Mechanics, that is, Stochastic Mechanics [S.M.]. It is a quantization scheme different from ordinary ones only formally. This approach introduces in quantum theory the whole mathematical apparatus of stochastic control theory. Stochastic Mechanics, in our view, is more intuitive when we want to study all the classical-like problems. We apply our scheme to build two classes of quantum packets both derived generalizing some properties of coherent states.

  7. Charles A. Lindbergh Learning Packet.

    ERIC Educational Resources Information Center

    Rodriguez, Charley

    This aerospace education learning packet contains information about the famous pilot, Charles A. Lindbergh. Posters, recommended teaching methods, tests with keys, and task cards are also included. (KHR)

  8. Packet utilisation definitions for the ESA XMM mission

    NASA Technical Reports Server (NTRS)

    Nye, H. R.

    1994-01-01

    XMM, ESA's X-Ray Multi-Mirror satellite, due for launch at the end of 1999 will be the first ESA scientific spacecraft to implement the ESA packet telecommand and telemetry standards and will be the first ESOC-controlled science mission to take advantage of the new flight control system infrastructure development (based on object-oriented design and distributed-system architecture) due for deployment in 1995. The implementation of the packet standards is well defined at packet transport level. However, the standard relevant to the application level (the ESA Packet Utilization Standard) covers a wide range of on-board 'services' applicable in varying degrees to the needs of XMM. In defining which parts of the ESA PUS to implement, the XMM project first considered the mission objectives and the derived operations concept and went on to identify a minimum set of packet definitions compatible with these aspects. This paper sets the scene as above and then describes the services needed for XMM and the telecommand and telemetry packet types necessary to support each service.

  9. Use of Radio Frequency Identification to Establish Emergency Medical Service Offload Times.

    PubMed

    Steer, Sheila; Bhalla, Mary C; Zalewski, Jon; Frey, Jennifer; Nguyen, Victor; Mencl, Francis

    2016-01-01

    Emergency medical services (EMS) crews often wait for emergency department (ED) beds to become available to offload their patients. Presently there is no national benchmark for EMS turnaround or offload times, or method for objectively and reliably measuring this. This study introduces a novel method for monitoring offload times and identifying variance. We performed a descriptive, observational study in a large urban community teaching hospital. We affixed radio frequency identification (RFID) tags (Confidex Survivor™, Confidex, Inc., Glen Ellyn, IL) to 65 cots from 19 different EMS agencies and placed a reader (CaptureTech Weatherproof RFID Interpreter, Barcoding Inc., Baltimore, Maryland) in the ED ambulance entrance, allowing for passive recording of traffic. We recorded data for 16 weeks starting December 2009. Offload times were calculated for each visit and analyzed using STATA to show variations in individual and cumulative offload times based on the time of day and day of the week. Results are presented as median times, confidence intervals (CIs), and interquartile ranges (IQRs). We collected data on 2,512 visits. Five hundred and ninety-two were excluded because of incomplete data, leaving 1,920 (76%) complete visits. Average offload time was 13.2 minutes. Median time was 10.7 minutes (IQR 8.1 minutes to 15.4 minutes). A total of 43% of the patients (833/1,920, 95% CI 0.41-0.46) were offloaded in less than 10 minutes, while 27% (513/1,920, 95% CI 0.25-0.29) took greater than 15 minutes. Median times were longest on Mondays (11.5 minutes) and shortest on Wednesdays (10.3 minutes). Longest daily median offload time occurred between 1600 and 1700 (13.5 minutes), whereas the shortest median time was between 0800 and 0900 (9.3 minutes). Cumulative time spent waiting beyond 15 minutes totaled 72.5 hours over the study period. RFID monitoring is a simple and effective means of monitoring EMS traffic and wait times. At our institution, most squads are able to

  10. Radiotherapy DICOM packet sniffing.

    PubMed

    Ackerly, T; Gesoand, M; Smith, R

    2008-09-01

    The Digital Imaging and Communications in Medicine (DICOM) standard is meant to allow communication of medical images between equipment provided by different vendors, but when two applications do not interact correctly in a multi-vendor environment it is often first necessary to demonstrate non-compliance of either the sender or the receiver before a resolution to the problem can be progressed. Sometimes the only way to do this is to monitor the network communication between the two applications to find out which one is not complying with the DICOM standard. Packet sniffing is a technique of network traffic analysis by passive observation of all information transiting a point on the network, regardless of the specified sender or receiver. DICOM packet sniffing traps and interprets the network communication between two DICOM applications to determine which is non compliant. This is illustrated with reference to three examples, a radiotherapy planning system unable to receive CT data from a particular CT scanner, a radiotherapy simulator unable to print correctly on a DICOM printer, and a PACS unable to respond when queried about what images it has in its archive by a radiotherapy treatment planning system. Additionally in this work it has been proven that it is feasible to extract DICOM images from the intercepted network data. This process can be applied to determine the cause of a DICOM image being rendered differently by the sender and the receiver.

  11. Packet Switching Networks: An Introduction with Some Attention to Selected Vendors.

    ERIC Educational Resources Information Center

    Sanchez, James Joseph

    The purpose of this paper is to provide an overview of the history, development, and services of the packet switching network services that currently exist in the United States. The character of packet switching, a computerized method of transmitting data, is used as the basis for tracing the development of the industry itself. Contending that the…

  12. New packet scheduling algorithm in wireless CDMA data networks

    NASA Astrophysics Data System (ADS)

    Wang, Yu; Gao, Zhuo; Li, Shaoqian; Li, Lemin

    2002-08-01

    The future 3G/4G wireless communication systems will provide internet access for mobile users. Packet scheduling algorithms are essential for QoS of diversified data traffics and efficient utilization of radio spectrum.This paper firstly presents a new packet scheduling algorithm DSTTF under the assumption of continuous transmission rates and scheduling intervals for CDMA data networks . Then considering the constraints of discrete transmission rates and fixed scheduling intervals imposed by the practical system, P-DSTTF, a modified version of DSTTF, is brought forward. Both scheduling algorithms take into consideration of channel condition, packet size and traffic delay bounds. The extensive simulation results demonstrate that the proposed scheduling algorithms are superior to some typical ones in current research. In addition, both static and dynamic wireless channel model of multi-level link capacity are established. These channel models sketch better the characterizations of wireless channel than two state Markov model widely adopted by the current literature.

  13. Vocational and Industrial Arts Packets.

    ERIC Educational Resources Information Center

    Maine Audubon Society, Falmouth.

    This book is a teacher's guide to energy alternatives. It is divided into seven informational packets on the following topics: parabolic solar concentrators, solar flat plate collectors, wood as fuel, heat loss, bio-gas, wind, and water. Each packet contains background information for the teachers and learning activities for the students. The…

  14. Tropical Animal Tour Packet. Metro.

    ERIC Educational Resources Information Center

    Metro Washington Park Zoo, Portland, OR. Educational Services Div.

    This packet is designed to assist teachers in creating a tropical animals lesson plan that centers around a visit to the zoo. A teacher packet is divided into eight parts: (1) goals and objectives; (2) what to expect at the zoo; (3) student activities (preparatory activities, on-site activities, and follow-up activities); (4) background…

  15. B-ISBN Onboard Processing Fast Packet Switch Developed

    NASA Technical Reports Server (NTRS)

    1995-01-01

    Future satellite communications applications will require a packet-switched onboard satellite processing system to route packets at very high speeds from uplink beams to different downlink beams. The rapid emergence of point-to-multipoint services, and the important role of satellites in a national and global information infrastructure, makes the multicast function essential to a fast packet switch (FPS). NASA Lewis Research Center's Digital System Technology Branch has been studying possible architectures for high-speed onboard-processing satellite systems. As part of this research, COMSAT Laboratories developed a broadband integrated services digital network (B-ISDN) fast packet switch for Lewis that was delivered on December 1994. The fast packet switch consists of eight inputs and eight outputs that can receive and transmit data, respectively, at a rate of 155 Mbps. The switch features multiple priorities (three) and multiple-size (three) satellite virtual cells that are similar to ATM cells in length (52 bytes). In addition, the fast packet switch features a congestion-control algorithm that allows users to set different thresholds for individual destination ports, thus throttling back the traffic from the transmitting port.

  16. 78 FR 66288 - An Inquiry Into the Commission's Policies and Rules Regarding AM Radio Service Directional...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-05

    ...-800-378-3160. This document is available in alternative formats (computer diskette, large print, audio... ad hoc technical group of radio broadcasters, equipment manufacturers, and broadcast consulting... multiple towers, which may be several hundred meters apart. The relatively large spacing...

  17. 47 CFR 2.1060 - Equipment for use in the amateur radio service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    .... 2.1060 Section 2.1060 Telecommunication FEDERAL COMMUNICATIONS COMMISSION GENERAL FREQUENCY ALLOCATIONS AND RADIO TREATY MATTERS; GENERAL RULES AND REGULATIONS Equipment Authorization Procedures... transmitted bandwidth shall be within the operating frequency band by an amount equal to 50 percent of...

  18. Experience with the EURECA Packet Telemetry and Packet Telecommand system

    NASA Technical Reports Server (NTRS)

    Sorensen, Erik Mose; Ferri, Paolo

    1994-01-01

    The European Retrieval Carrier (EURECA) was launched on its first flight on the 31st of July 1992 and retrieved on the 29th of June 1993. EURECA is characterized by several new on-board features, most notably Packet telemetry, and a partial implementation of packet telecommanding, the first ESA packetised spacecraft. Today more than one year after the retrieval the data from the EURECA mission has to a large extent been analysed and we can present some of the interesting results. This paper concentrates on the implementation and operational experience with the EURECA Packet Telemetry and Packet Telecommanding. We already discovered during the design of the ground system that the use of packet telemetry has major impact on the overall design and that processing of packet telemetry may have significant effect on the computer loading and sizing. During the mission a number of problems were identified with the on-board implementation resulting in very strange anomalous behaviors. Many of these problems directly violated basic assumptions for the design of the ground segment adding to the strange behavior. The paper shows that the design of a telemetry packet system should be flexible enough to allow a rapid configuration of the telemetry processing in order to adapt it to the new situation in case of an on-board failure. The experience gained with the EURECA mission control should be used to improve ground systems for future missions.

  19. Public mobile radio services; regulatory policies and procedures for the Domestic Public Land Mobile Radio Service--Federal Communications Commission. Final rule.

    PubMed

    1983-02-25

    Final policies and procedures concerning objective need showings are being adopted for applications requesting multiple new two-way channels and applications requesting additional channels for an existing system. The policies and procedures we had in the past were vague and did not provide applicants with sufficient information as to what was required in need showings before various types of applications could be granted. Thus, applicants requesting multiple new two-way frequencies or additional two-way channels for an existing system must show that the existing, projected or expected grade of service for the proposed facilities is .25 or greater, this will determine the number of new or additional channels granted.

  20. Design of a Multicast Optical Packet Switch Based on Fiber Bragg Grating Technology for Future Networks

    NASA Astrophysics Data System (ADS)

    Cheng, Yuh-Jiuh; Yeh, Tzuoh-Chyau; Cheng, Shyr-Yuan

    2011-09-01

    In this paper, a non-blocking multicast optical packet switch based on fiber Bragg grating technology with optical output buffers is proposed. Only the header of optical packets is converted to electronic signals to control the fiber Bragg grating array of input ports and the packet payloads should be transparently destined to their output ports so that the proposed switch can reduce electronic interfaces as well as the bit rate. The modulation and the format of packet payloads may be non-standard where packet payloads could also include different wavelengths for increasing the volume of traffic. The advantage is obvious: the proposed switch could transport various types of traffic. An easily implemented architecture which can provide multicast services is also presented. An optical output buffer is designed to queue the packets if more than one incoming packet should reach to the same destination output port or including any waiting packets in optical output buffer that will be sent to the output port at a time slot. For preserving service-packet sequencing and fairness of routing sequence, a priority scheme and a round-robin algorithm are adopted at the optical output buffer. The fiber Bragg grating arrays for both input ports and output ports are designed for routing incoming packets using optical code division multiple access technology.

  1. Routing in circuit and Packet Switched Networks: An Annotated Bibliography.

    DTIC Science & Technology

    1981-09-14

    papers. These reviews focus on parts of the papers relevant to the DSN. 2. INDEX TO SELECTED TOPICS 2.1 Circuit-Switched Networks 2.1.1 Routing Bernas and...engineering - Bell System. 2.1.3 Event-by-Event Simulations Bernas and Grieco (1978) POLYGRID vs. adaptive vs. flood search routing - AUTOVON simula- tion...Enhance Survivability Bernas and Grieco (1978) POLYGRID, adaptive and flood search routing. Gafni and Bertsekas (1981) Distributed routing for packet radio

  2. 75 FR 22338 - Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-28

    ... to data services that are provided without interconnection to the public switched network--including... the development and deployment of data network facilities and services, competition for mobile... requirement that the requesting provider offer the services on its own network for which it is requesting...

  3. High speed packet switching

    NASA Technical Reports Server (NTRS)

    1991-01-01

    This document constitutes the final report prepared by Proteon, Inc. of Westborough, Massachusetts under contract NAS 5-30629 entitled High-Speed Packet Switching (SBIR 87-1, Phase 2) prepared for NASA-Greenbelt, Maryland. The primary goal of this research project is to use the results of the SBIR Phase 1 effort to develop a sound, expandable hardware and software router architecture capable of forwarding 25,000 packets per second through the router and passing 300 megabits per second on the router's internal busses. The work being delivered under this contract received its funding from three different sources: the SNIPE/RIG contract (Contract Number F30602-89-C-0014, CDRL Sequence Number A002), the SBIR contract, and Proteon. The SNIPE/RIG and SBIR contracts had many overlapping requirements, which allowed the research done under SNIPE/RIG to be applied to SBIR. Proteon funded all of the work to develop new router interfaces other than FDDI, in addition to funding the productization of the router itself. The router being delivered under SBIR will be a fully product-quality machine. The work done during this contract produced many significant findings and results, summarized here and explained in detail in later sections of this report. The SNIPE/RIG contract was completed. That contract had many overlapping requirements with the SBIR contract, and resulted in the successful demonstration and delivery of a high speed router. The development that took place during the SNIPE/RIG contract produced findings that included the choice of processor and an understanding of the issues surrounding inter processor communications in a multiprocessor environment. Many significant speed enhancements to the router software were made during that time. Under the SBIR contract (and with help from Proteon-funded work), it was found that a single processor router achieved a throughput significantly higher than originally anticipated. For this reason, a single processor router was

  4. Modelling and performance of packet synchronization in a data communications system

    NASA Astrophysics Data System (ADS)

    Boettcher, Axel

    1992-12-01

    This paper deals with some problems of packet synchronization in a slotted packet-radio communications system. The problems considered are bit-synchronization and unique word detection for bursty systems. The necessary overhead for synchronization purposes is dimensioned for applications in land-mobile satellite communication systems. The performance of synchronization is evaluated using hardware measurement equipment, including a commercial bit-synchronizer. Using these results, the performance loss of communication systems due to packet synchronization effects can be estimated. This is done for the additive white Gaussian noise channel and the class of land-mobile satellite channels.

  5. IEEE 802.16 Packet Scheduling with Traffic Prioritization and Cross-Layer Optimization

    NASA Astrophysics Data System (ADS)

    Monteiro, João; Sargento, Susana; Gomes, Álvaro; Fontes, Francisco; Neves, Pedro

    WiMAX is emerging as a broadband wireless access technology to satisfy end user expectations, containing a new set of advantages in terms of throughput, coverage and QoS support at the MAC level which allows convergence of several different types of applications and services. For that reason, the allocation of resources or scheduling becomes of greater importance. This paper focuses on a cross-layer scheduling optimization solution for IEEE 802.16. The relevant features of the proposed packet scheduling optimization scheme consist: of prioritization of users within the same traffic class, allowing for example to an operator, differentiated treatment among users, for instance distinguishing between premium or gold users and silver users; and also cross layer optimization which implies radio resource optimization and a more effective scheduler decision. Simulation scenarios are presented to demonstrate how the scheduling solution allocates resources through particular WiMAX MAC layer implementation in the NS-2 simulator. Results show that the new mechanism implementation results in an improvement to the simple Round Robin fashion present in the original simulation model, being able to increase differentiation between different classes and decrease packets delay, due to its cross-layer processing and traffic prioritization.

  6. Threatened and Endangered Species: Tour Packet.

    ERIC Educational Resources Information Center

    Coats, Victoria; Samia, Cory

    This resource unit contains a teacher information packet and a middle school student activity packet to be used in creating a threatened and endangered species unit. The packet of student activities is designed to help maximize a field trip to the zoo and build on students' zoo experience in the classroom. The teacher information packet covers the…

  7. Wavelet Packets in Wideband Multiuser Communications

    DTIC Science & Technology

    2004-11-01

    developed doubly orthogonal CDMA user spreading waveforms based on wavelet packets. We have also developed and evaluated a wavelet packet based ...inter symbol interferences. Compared with the existing DFT based multicarrier CDMA systems, better performance is achieved with the wavelet packet...23 3.4 Over Loaded Waveform Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4. Wavelet Packet Based Time-Varying

  8. Packet flow monitoring tool and method

    DOEpatents

    Thiede, David R [Richland, WA

    2009-07-14

    A system and method for converting packet streams into session summaries. Session summaries are a group of packets each having a common source and destination internet protocol (IP) address, and, if present in the packets, common ports. The system first captures packets from a transport layer of a network of computer systems, then decodes the packets captured to determine the destination IP address and the source IP address. The system then identifies packets having common destination IP addresses and source IP addresses, then writes the decoded packets to an allocated memory structure as session summaries in a queue.

  9. Bohmian trajectories of Airy packets

    SciTech Connect

    Nassar, Antonio B.; Miret-Artés, Salvador

    2014-09-15

    The discovery of Berry and Balazs in 1979 that the free-particle Schrödinger equation allows a non-dispersive and accelerating Airy-packet solution has taken the folklore of quantum mechanics by surprise. Over the years, this intriguing class of wave packets has sparked enormous theoretical and experimental activities in related areas of optics and atom physics. Within the Bohmian mechanics framework, we present new features of Airy wave packet solutions to Schrödinger equation with time-dependent quadratic potentials. In particular, we provide some insights to the problem by calculating the corresponding Bohmian trajectories. It is shown that by using general space–time transformations, these trajectories can display a unique variety of cases depending upon the initial position of the individual particle in the Airy wave packet. Further, we report here a myriad of nontrivial Bohmian trajectories associated to the Airy wave packet. These new features are worth introducing to the subject’s theoretical folklore in light of the fact that the evolution of a quantum mechanical Airy wave packet governed by the Schrödinger equation is analogous to the propagation of a finite energy Airy beam satisfying the paraxial equation. Numerous experimental configurations of optics and atom physics have shown that the dynamics of Airy beams depends significantly on initial parameters and configurations of the experimental set-up.

  10. The throughput of packet broadcasting channels

    NASA Technical Reports Server (NTRS)

    Abramson, N.

    1977-01-01

    A unified presentation of packet broadcasting theory is presented. Section II introduces the theory of packet broadcasting data networks. Section III provides some theoretical results on the performance of a packet broadcasting network when users have a variety of data rates. Section IV deals with packet broadcasting networks distributed in space, and in Section V some properties of power-limited packet broadcasting channels are derived, showing that the throughput of such channels can approach that of equivalent point-to-point channels.

  11. 77 FR 72237 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-05

    ... interference-free (NIF) service. For most stations, the daytime 2.0 mV/m groundwave contour completely encompasses the NIF contour, thus the NIF contour constitutes the full-time service area for such stations. Where the daytime 2.0 mV/m groundwave and NIF contours neither completely encompass nor are...

  12. Precise radio Doppler and interferometric tracking of spacecraft in service of planetary science

    NASA Astrophysics Data System (ADS)

    Duev, Dmitry; PRIDE Team

    2016-10-01

    The Planetary Radio Interferometry and Doppler Experiments (PRIDE) project is designed as a multi-purpose, multidisciplinary enhancement of the space missions science return by means of Doppler and phase-referenced Very Long Baseline Interferometry (VLBI) tracking of spacecraft. These measurements can be used in a multitude of scientific applications, both fundamental and applied, where an accurate estimate of the spacecraft state vector is essential. In particular, the gravitational field of planetary moons can be sampled with close spacecraft flybys, allowing to probe the moons' interior.In this presentation, we will describe the principles of PRIDE data collection, processing, and analysis. We will present the results of demonstrational observations of a Phobos flyby conducted by ESA's Mars Express spacecraft.

  13. Radio Galaxies.

    ERIC Educational Resources Information Center

    Downes, Ann

    1986-01-01

    Provides background information on radio galaxies. Topic areas addressed include: what produces the radio emission; radio telescopes; locating radio galaxies; how distances to radio galaxies are found; physics of radio galaxies; computer simulations of radio galaxies; and the evolution of radio galaxies with cosmic time. (JN)

  14. Research on the key technology and application of the packet transmission network

    NASA Astrophysics Data System (ADS)

    Yun, Xiang; Wang, Zhong

    2009-08-01

    In proportion to the rapid development of telecommunication service, Telecom Operators already have made a strategic transition from "Network, Communication Operators" into "integrated information service provider" to provide customer with varied information service, such as the BT "21st century plan", "Next" plan proposed by France Telecom, FNE and BMS plan by Australia Telstra, RANE Programs by NTT. Domestic Carries also made strategic transition plans. And the priority of network transition is to find the way to build a unified and integrated network supporting carrier-grade Ethernet service also compatible with the conventional network service. The division of the service results in the Packet transmission, namely packet technology, makes Packet-based Transmission Network keeping the virtues of transmission network. The virtues are good scalability, varied operation and maintenance, high-speed protection switching, connection-oriented feature, and building up connection with NMS. At the same time, it adds some characteristics to adapt the statistical multiplexing in the packet service, for instance: connection-oriented label switching, QoS mechanism, dynamic and flexible control plane. The Packet Transmission Network (PTN) can be divided into four layers: packet transmission channel layer (PTC), packet transmission path layer (PTP), and optional packet transmission section Layer (PTS) and physical layer. The key technologies of PTN are as follows: the connection-oriented based label transmission and the statistical multiplexing on packet switching. The use of layer and sub-domain is to provide good scalability. Supporting for fault detection and performance testing and other Operation, Management and Maintenance (OAM) function, linear protection switching, ring protection, dynamics survival technology of pre-placed re-route, QoS, circuit emulation for TDM service, ATM based on PWE3 technique, and MAC layer or physical layer based packet clock synchronization

  15. 76 FR 42574 - Policies To Promote Rural Radio Service and To Streamline Allotment and Assignment Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-19

    ... principal community contour over 50 percent or more of an Urbanized Area. In the case of an FM station, the... applicants to consider widely-used techniques, such as directional antennas and contour protection, when... fifth reception service, and the percentage of the population in the station's current protected...

  16. 76 FR 63561 - Reexamination of Roaming Obligations of Commercial Mobile Radio Service Providers and Other...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-13

    ... Other Providers of Mobile Data Services; Public Information Collection Approved by Office of Management... received Office of Management and Budget (OMB) approval for public information collection 3060-0411, which is associated with the new complaint mechanism for resolving data roaming disputes with...

  17. Self-Interfering Wave Packets

    NASA Astrophysics Data System (ADS)

    Colas, David; Laussy, Fabrice P.

    2016-01-01

    We study the propagation of noninteracting polariton wave packets. We show how two qualitatively different concepts of mass that arise from the peculiar polariton dispersion lead to a new type of particlelike object from noninteracting fields—much like self-accelerating beams—shaped by the Rabi coupling out of Gaussian initial states. A divergence and change of sign of the diffusive mass results in a "mass wall" on which polariton wave packets bounce back. Together with the Rabi dynamics, this yields propagation of ultrafast subpackets and ordering of a spacetime crystal.

  18. Sports Medicine. Clinical Rotation. Instructor's Packet and Student Study Packet.

    ERIC Educational Resources Information Center

    Texas Univ., Austin. Extension Instruction and Materials Center.

    The materials in this packet are for a course designed to provide individualized classroom study for a specific area of clinical rotation--sports medicine. The instructor's manual describes the learning objectives together with a list of reference materials that should be provided for completion of the student worksheets, and lists suggested…

  19. Environment Resource Packets Get Wide Use

    ERIC Educational Resources Information Center

    Chemical and Engineering News, 1974

    1974-01-01

    Announces the availability of the resource packet entitled "Noise Pollution," the third in the series prepared by the University of Maryland, and the main topics which will be covered in the remaining three packets. (CC)

  20. A robust coding scheme for packet video

    NASA Technical Reports Server (NTRS)

    Chen, Yun-Chung; Sayood, Khalid; Nelson, Don J.

    1992-01-01

    A layered packet video coding algorithm based on a progressive transmission scheme is presented. The algorithm provides good compression and can handle significant packet loss with graceful degradation in the reconstruction sequence. Simulation results for various conditions are presented.

  1. Dynamics of quantum wave packets

    SciTech Connect

    Gosnell, T.R.; Taylor, A.J.; Rodriguez, G.; Clement, T.S.

    1998-11-01

    This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The objective of this project was to develop ultrafast laser techniques for the creation and measurement of quantum vibrational wave packets in gas phase diatomic molecules. Moreover, the authors sought to manipulate the constitution of these wave packets in terms of harmonic-oscillator basis wavefunctions by manipulating the time-dependent amplitude and phase of the incident ultrashort laser pulse. They specifically investigated gaseous diatomic potassium (K{sub 2}), and discovered variations in the shape of the wave packets as a result of changing the linear chirp in the ultrashort preparation pulse. In particular, they found evidence for wave-packet compression for a specific degree of chirp. Important ancillary results include development of new techniques for denoising and deconvolution of femtosecond time traces and techniques for diagnosing the phase and amplitude of the electric field of femtosecond laser pulses.

  2. Science and Art, Learning Packet.

    ERIC Educational Resources Information Center

    Singer, Carla Michalove

    Science and art have much in common. Artists as well as scientists carefully observe and communicate their subjects. Throughout time, artists have been involved in experimentation, an important scientific method which can lead to new discoveries. Both scientific developments and the ongoing history of art are cumulative. This learning packet is an…

  3. Recycling Study Guide [Resource Packet].

    ERIC Educational Resources Information Center

    Wisconsin State Dept. of Natural Resources, Madison.

    This resource packet contains six documents developed by the Wisconsin Department of Natural Resources in order to help teachers infuse the environmental education topics of recycling and solid waste into social studies, art, English, health, mathematics, science, and environmental education classes. "Recycling Study Guide" contains 19…

  4. Homelessness: A General Information Packet.

    ERIC Educational Resources Information Center

    Homelessness Exchange, Washington, DC.

    This packet contains documents that provide general information about homelessness and the need for both Federal and local action to help the homeless people in America. Sections 1 and 2 contain the following articles released by the Homelessness Information Exchange: (1) "The Problem of Homelessness Nationwide"; and "Alternative Family Housing…

  5. Information Packet on Surrogate Parents.

    ERIC Educational Resources Information Center

    Moore, Jean J.; Mason, Doris M.

    The information packet focuses on the role of the surrogate parent with emphasis on the rights of the handicapped child as mandated by P.L. 94-142, the Education for All Handicapped Children Act. Included are the following: a discussion of 10 surrogate parent issues identified through a literature search and survey of five states (Connecticut,…

  6. Dissection & Science Fairs. [Information Packet.

    ERIC Educational Resources Information Center

    National Anti-Vivisection Society, Chicago, IL.

    This collection of pamphlets and articles reprinted from other National Anti-Vivisection Society (NAVS) publications was compiled to address the issues of classroom laboratory dissection and the use of animals in science fair projects. Three of the pamphlets contained in this packet are student handbooks designed to help students of elementary,…

  7. Hunger and Development [Issue Packet].

    ERIC Educational Resources Information Center

    American Freedom from Hunger Foundation, Washington, DC.

    A variety of informational materials is compiled in this issue packet concentrating on hunger and development. They have been assembled to understand the issues associated with the facts of world hunger and to try to invent new forms of action and thought necessary to find the possibilities hidden in the hunger issue. Items include: (1) a fact and…

  8. Population and Development [Issue Packet].

    ERIC Educational Resources Information Center

    American Freedom from Hunger Foundation, Washington, DC.

    A variety of informational materials is compiled in this issue packet concentrating on population and development. The materials have been assembled to understand the issues associated with the facts of the world's population and to try to invent new forms of action and thought necessary to find the possibilities hidden in the population issue.…

  9. Ancient Chinese Bronzes: Teacher's Packet.

    ERIC Educational Resources Information Center

    Smithsonian Institution, Washington, DC. Arthur M. Sackler Gallery.

    The focus of this teacher's packet is the bronze vessels made for the kings and great families of the early Chinese dynasties between 1700 B.C. and 200 A.D. The materials in the guide are intended for use by teachers and students visiting the exhibition, "The Arts of China," at the Arthur M. Sackler Gallery of the Smithsonian Institution…

  10. [KIND Worksheet Packet: Wild Animals (Junior).

    ERIC Educational Resources Information Center

    National Association for Humane and Environmental Education, East Haddam, CT.

    This packet is the junior part of a series of worksheet packets available at both junior (grades 3-4) and senior (grades 5-6) levels that covers a variety of humane and environmental topics. Each packet includes 10 worksheets, all of which originally appeared in past issues of the annual teaching magazine "KIND (Kids in Nature's Defense)…

  11. [KIND Worksheet Packet: Wild Animals (Senior).

    ERIC Educational Resources Information Center

    National Association for Humane and Environmental Education, East Haddam, CT.

    This packet is the senior part of a series of worksheet packets available at both junior (grades 3-4) and senior (grades 5-6) levels that covers a variety of humane and environmental topics. Each packet includes 10 worksheets, all of which originally appeared in past issues of the annual teaching magazine "KIND (Kids in Nature's Defense)…

  12. Trade Related Reading Packets for Disabled Readers.

    ERIC Educational Resources Information Center

    Davis, Beverly; Woodruff, Nancy S.

    Six trade-related reading packets for disabled readers are provided for these trades: assemblers, baking, building maintenance, data entry, interior landscaping, and warehousing. Each packet stresses from 9 to 14 skills. Those skills common to most packets include context clues, fact or opinion, details, following directions, main idea,…

  13. Radio broadcasting via satellite

    NASA Astrophysics Data System (ADS)

    Helm, Neil R.; Pritchard, Wilbur L.

    1990-10-01

    Market areas offering potential for future narrowband broadcast satellites are examined, including international public diplomacy, government- and advertising-supported, and business-application usages. Technical issues such as frequency allocation, spacecraft types, transmission parameters, and radio receiver characteristics are outlined. Service and system requirements, advertising revenue, and business communications services are among the economic issues discussed. The institutional framework required to provide an operational radio broadcast service is studied, and new initiatives in direct broadcast audio radio systems, encompassing studies, tests, in-orbit demonstrations of, and proposals for national and international commercial broadcast services are considered.

  14. An Efficient Conflict Detection Algorithm for Packet Filters

    NASA Astrophysics Data System (ADS)

    Lee, Chun-Liang; Lin, Guan-Yu; Chen, Yaw-Chung

    Packet classification is essential for supporting advanced network services such as firewalls, quality-of-service (QoS), virtual private networks (VPN), and policy-based routing. The rules that routers use to classify packets are called packet filters. If two or more filters overlap, a conflict occurs and leads to ambiguity in packet classification. This study proposes an algorithm that can efficiently detect and resolve filter conflicts using tuple based search. The time complexity of the proposed algorithm is O(nW+s), and the space complexity is O(nW), where n is the number of filters, W is the number of bits in a header field, and s is the number of conflicts. This study uses the synthetic filter databases generated by ClassBench to evaluate the proposed algorithm. Simulation results show that the proposed algorithm can achieve better performance than existing conflict detection algorithms both in time and space, particularly for databases with large numbers of conflicts.

  15. Fast Packet Classification Using Multi-Dimensional Encoding

    NASA Astrophysics Data System (ADS)

    Huang, Chi Jia; Chen, Chien

    Internet routers need to classify incoming packets quickly into flows in order to support features such as Internet security, virtual private networks and Quality of Service (QoS). Packet classification uses information contained in the packet header, and a predefined rule table in the routers. Packet classification of multiple fields is generally a difficult problem. Hence, researchers have proposed various algorithms. This study proposes a multi-dimensional encoding method in which parameters such as the source IP address, destination IP address, source port, destination port and protocol type are placed in a multi-dimensional space. Similar to the previously best known algorithm, i.e., bitmap intersection, multi-dimensional encoding is based on the multi-dimensional range lookup approach, in which rules are divided into several multi-dimensional collision-free rule sets. These sets are then used to form the new coding vector to replace the bit vector of the bitmap intersection algorithm. The average memory storage of this encoding is Θ (L · N · log N) for each dimension, where L denotes the number of collision-free rule sets, and N represents the number of rules. The multi-dimensional encoding practically requires much less memory than bitmap intersection algorithm. Additionally, the computation needed for this encoding is as simple as bitmap intersection algorithm. The low memory requirement of the proposed scheme means that it not only decreases the cost of packet classification engine, but also increases the classification performance, since memory represents the performance bottleneck in the packet classification engine implementation using a network processor.

  16. Nonuniform spatially adaptive wavelet packets

    NASA Astrophysics Data System (ADS)

    Carre, Philippe; Fernandez-Maloigne, Christine

    2000-12-01

    In this paper, we propose a new decomposition scheme for spatially adaptive wavelet packets. Contrary to the double tree algorithm, our method is non-uniform and shift- invariant in the time and frequency domains, and is minimal for an information cost function. We prose some-restrictions to our algorithm to reduce the complexity and permitting us to provide some time-frequency partitions of the signal in agreement with its structure. This new 'totally' non-uniform transform, more adapted than Malvar, Packets or dyadic double-tree decomposition, allows the study of all possible time-frequency partitions with the only restriction that the blocks are rectangular. It permits one to obtain a satisfying Time-Frequency representation, and is applied for the study of EEG signals.

  17. Cooperative use and multiple licensing of stations in the private land mobile radio services--Federal Communications Commission. Final rule; report and order.

    PubMed

    1982-05-06

    The Federal Communications Commission is adopting rules to govern the cooperative sharing and multiple licensing of facilities in its private land mobile radio services. The rules which are adopted define the types of arrangements which will and will not be allowed. These rules have been adopted: (1) To remove certain procedural burdens heretofore required ot licensees and user eligibles; (2) To assure adequate licensee control; and (3) To codify permissible licensee and user practices relating to multiple licensed and cooperatively shared systems.

  18. Optical node for fast packet-switching networks in the KEOPS project: structure and performance aspects

    NASA Astrophysics Data System (ADS)

    Chiaroni, Dominique; Lavigne, Bruno; Tran, Tri; Hamon, Laure; Jourdan, Amaury

    1998-10-01

    The future telecommunication network will have to face the dramatic increase of subscribers as well as the increase of the user bandwidth through new services. All-optical packet switching techniques can become a strategic objective to offer on an unique technology a service-transparent network. In this paper, we will describe in detail the structure of an optical packet switching node developed in the framework of the ACTS 043 KEOPS project. An analysis of the key functions will be reported to fulfill system requirements including cascadability. In particular the input synchronization, the Broadcast-and-select switching matrix and the output regenerative interface will be described and physical performance will be assessed through theoretical analysis: quality of the signal, packet jitter and packet power fluctuation. The electronic circuitry for the control of the components of each sub-block will be described. Finally, experimental validations of a 160 Gbit/s throughput node will be reported. In order to complete the analysis, the logical performance in a Bernoulli-type traffic will be regarded. In particular an optimized buffer including a recirculation loop will be studied. Logical performance exhibiting a packet loss rate lower than 10-9 for a 0.8 load and mean packet delay as low as 3 packet slots will be illustrated, thereby demonstrating full compatibility with ATM constraints. Finally, new perspectives in terms of throughput potential through cascading will be drawn.

  19. Wavelet-based compression with ROI coding support for mobile access to DICOM images over heterogeneous radio networks.

    PubMed

    Maglogiannis, Ilias; Doukas, Charalampos; Kormentzas, George; Pliakas, Thomas

    2009-07-01

    Most of the commercial medical image viewers do not provide scalability in image compression and/or region of interest (ROI) encoding/decoding. Furthermore, these viewers do not take into consideration the special requirements and needs of a heterogeneous radio setting that is constituted by different access technologies [e.g., general packet radio services (GPRS)/ universal mobile telecommunications system (UMTS), wireless local area network (WLAN), and digital video broadcasting (DVB-H)]. This paper discusses a medical application that contains a viewer for digital imaging and communications in medicine (DICOM) images as a core module. The proposed application enables scalable wavelet-based compression, retrieval, and decompression of DICOM medical images and also supports ROI coding/decoding. Furthermore, the presented application is appropriate for use by mobile devices activating in heterogeneous radio settings. In this context, performance issues regarding the usage of the proposed application in the case of a prototype heterogeneous system setup are also discussed.

  20. Hop Reservation Multiple Access (HRMA) for Multichannel Packet Radio Networks

    DTIC Science & Technology

    1998-01-01

    protocols as FAMA [4][7] and MACAW [5]. To simplify our analysis, a non-persistent policy is used for hop reser- vations; persistent versions of HRMA are...and SPARROW Project. http://www.cse.ucsc.edu/research/ccrg/, Santa Cruz, CA, 1998. [5] V. Bharghavan, A. Demers, S. Shenker, and L. Zhang. Macaw : A

  1. Side Information in Spread-Spectrum Packet Radio Networks

    DTIC Science & Technology

    1991-06-21

    coaft~ biof nf ormaion. $an C40tf~i rgading th. bwdieft eistat ofy Aŕ auti o fIII"IIII w to IInoq -Saaunf Sw-f OW90rtfo o I ns ovn atii j ntml..dii W...probabilities listed in Table 2 are not changed . Recall that these are the probabilities that a symbol is in error given the type of interference present...interval. So,pj,p are not changed and ais taken to be a’andflis taken to be 3’. To be able to compare the side information schemes, certain precautions must

  2. Command and Control Related Computer Technology. Part 1. Packet Radio

    DTIC Science & Technology

    1975-03-01

    such an interpolation is expensive. But, let us leave that problem aside. For simplicity consider a spectrum with one formant (i.e., a pair of...should also have one formant that lies in between the peaks of the given two spectra. However, use of spectral int .-rpolation results in a spectrum...8217«.*..V«V-. v .• .- . •. -. IM 11 !■ example), it seems that the formant frequencies should be used for . ,_•, interpolation. This is

  3. SDN architecture for optical packet and circuit integrated networks

    NASA Astrophysics Data System (ADS)

    Furukawa, Hideaki; Miyazawa, Takaya

    2016-02-01

    We have been developing an optical packet and circuit integrated (OPCI) network, which realizes dynamic optical path, high-density packet multiplexing, and flexible wavelength resource allocation. In the OPCI networks, a best-effort service and a QoS-guaranteed service are provided by employing optical packet switching (OPS) and optical circuit switching (OCS) respectively, and users can select these services. Different wavelength resources are assigned for OPS and OCS links, and the amount of their wavelength resources are dynamically changed in accordance with the service usage conditions. To apply OPCI networks into wide-area (core/metro) networks, we have developed an OPCI node with a distributed control mechanism. Moreover, our OPCI node works with a centralized control mechanism as well as a distributed one. It is therefore possible to realize SDN-based OPCI networks, where resource requests and a centralized configuration are carried out. In this paper, we show our SDN architecture for an OPS system that configures mapping tables between IP addresses and optical packet addresses and switching tables according to the requests from multiple users via a web interface. While OpenFlow-based centralized control protocol is coming into widespread use especially for single-administrative, small-area (LAN/data-center) networks. Here, we also show an interworking mechanism between OpenFlow-based networks (OFNs) and the OPCI network for constructing a wide-area network, and a control method of wavelength resource selection to automatically transfer diversified flows from OFNs to the OPCI network.

  4. Causal evolution of wave packets

    NASA Astrophysics Data System (ADS)

    Eckstein, Michał; Miller, Tomasz

    2017-03-01

    Drawing from the optimal transport theory adapted to the relativistic setting we formulate the principle of a causal flow of probability and apply it in the wave-packet formalism. We demonstrate that whereas the Dirac Hamiltonian impels a causal evolution of probabilities, even in the presence of interactions, the relativistic-Schrödinger model is acausal. We quantify the causality breakdown in the latter model and argue that, in contrast to the popular viewpoint, it is not related to the localization properties of the states.

  5. On-board B-ISDN fast packet switching architectures. Phase 2: Development. Proof-of-concept architecture definition report

    NASA Technical Reports Server (NTRS)

    Shyy, Dong-Jye; Redman, Wayne

    1993-01-01

    For the next-generation packet switched communications satellite system with onboard processing and spot-beam operation, a reliable onboard fast packet switch is essential to route packets from different uplink beams to different downlink beams. The rapid emergence of point-to-point services such as video distribution, and the large demand for video conference, distributed data processing, and network management makes the multicast function essential to a fast packet switch (FPS). The satellite's inherent broadcast features gives the satellite network an advantage over the terrestrial network in providing multicast services. This report evaluates alternate multicast FPS architectures for onboard baseband switching applications and selects a candidate for subsequent breadboard development. Architecture evaluation and selection will be based on the study performed in phase 1, 'Onboard B-ISDN Fast Packet Switching Architectures', and other switch architectures which have become commercially available as large scale integration (LSI) devices.

  6. Greedy data transportation scheme with hard packet deadlines for wireless ad hoc networks.

    PubMed

    Lee, HyungJune

    2014-01-01

    We present a greedy data transportation scheme with hard packet deadlines in ad hoc sensor networks of stationary nodes and multiple mobile nodes with scheduled trajectory path and arrival time. In the proposed routing strategy, each stationary ad hoc node en route decides whether to relay a shortest-path stationary node toward destination or a passing-by mobile node that will carry closer to destination. We aim to utilize mobile nodes to minimize the total routing cost as far as the selected route can satisfy the end-to-end packet deadline. We evaluate our proposed routing algorithm in terms of routing cost, packet delivery ratio, packet delivery time, and usability of mobile nodes based on network level simulations. Simulation results show that our proposed algorithm fully exploits the remaining time till packet deadline to turn into networking benefits of reducing the overall routing cost and improving packet delivery performance. Also, we demonstrate that the routing scheme guarantees packet delivery with hard deadlines, contributing to QoS improvement in various network services.

  7. Radios in the Classroom: Curriculum Integration and Communication Skills.

    ERIC Educational Resources Information Center

    Ninno, Anton

    2000-01-01

    Describes radio applications for education and summarizes radio activities for elementary and secondary school classrooms. Discusses teaching the history of radio communications; AM-FM radio; international shortwave broadcasts; NOAA (National Oceanic and Atmospheric Administration) weather service broadcasts; scanner radios; and amateur radios.…

  8. Archaeology: Smithsonian Institution Teacher's Resource Packet.

    ERIC Educational Resources Information Center

    National Museum of Natural History, Washington, DC.

    This archaeology resource packet provides information on frequently asked questions of the National Museum of Natural History (Smithsonian Institution), including the topics of: (1) career information; (2) excavation; (3) fieldwork opportunities; (4) artifact identification; and (5) preservation. The packet is divided into six sections. Section 1…

  9. Energy Conservation Activity Packet, Grade 5.

    ERIC Educational Resources Information Center

    Bakke, Ruth

    This activity packet for grade 5 is one of a series developed in response to concern for energy conservation. It contains activities that stress an energy conservation ethic and includes many values clarification activities for grade five. The packet is divided into two parts and provides the teacher with background information, concepts and…

  10. German Cultural Packets 13 and 14.

    ERIC Educational Resources Information Center

    Atlanta Public Schools, GA.

    These German culture packets are designed to accompany A-LM Level II and include a statement of the rationale behind the unit, the objectives of the packet, the activities themselves, and a brief evaluation by the student. The activities involve the use of the basic text, the student workbook, corresponding tapes, and fellow students as partners…

  11. Power-Aware Cognitive Packet Networks

    DTIC Science & Technology

    2005-04-01

    Power-Aware Cognitive Packet Networks Erol Gelenbe Dennis Gabor Chair Ricardo Lent Research Fellow Department of Electrical and Electronic...intelligent distribution of energy consumption in the network Power-Aware Cognitive Packet Networks Erol Gelenbe Dennis Gabor Chair Ricardo Lent

  12. Jamestown Settlement Museum Teacher Resource Packet.

    ERIC Educational Resources Information Center

    Jamestown-Yorktown Foundation, Williamsburg, VA. Education Dept.

    This teacher's packet provides background materials for teachers to incorporate the study of Jamestown, Virginia, into their classroom. The packet includes the following background essays: (1) "A Short History of Jamestown"; (2) "The Fort"; (3) "Life in an Indian Village"; (4) "Recommended Reading and…

  13. Program and Product Evaluation: An Information Packet.

    ERIC Educational Resources Information Center

    Ewy, Robert W.; Chase, Cheryl

    This is one of a series of information packets developed as part of Project ACCESS to aid Colorado teachers, educational administrators, and school board members in implementing local educational improvement plans as mandated by Colorado's Educational Accountability Act of 1971. This particular information packet provides a framework for…

  14. Oral Hygiene. Instructor's Packet. Learning Activity Package.

    ERIC Educational Resources Information Center

    Hime, Kirsten

    This instructor's packet accompanies the learning activity package (LAP) on oral hygiene. Contents included in the packet are a time sheet, suggested uses for the LAP, an instruction sheet, final LAP reviews, a final LAP review answer key, suggested activities, additional resources (student handouts), student performance checklists for both…

  15. 47 CFR 25.214 - Technical requirements for space stations in the Satellite Digital Audio Radio Service and...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 2 2014-10-01 2014-10-01 false Technical requirements for space stations in... Technical Standards § 25.214 Technical requirements for space stations in the Satellite Digital Audio Radio... licensee is potentially affected if it is authorized to operate a base station in the 2305-2315 MHz or...

  16. History, Policy, and Universal Service: Does the Educational Radio and Television Experience Foreshadow What Is To Come?

    ERIC Educational Resources Information Center

    Arafeh, Sousan

    Struggles over educational access to new communications technologies in the age of U.S. radio and television provide insights into current struggles of educational access to the "information superhighway." Findings from an historical analysis of these earlier periods show that educational access to new communications technologies is…

  17. Bad data packet capture device

    DOEpatents

    Chen, Dong; Gara, Alan; Heidelberger, Philip; Vranas, Pavlos

    2010-04-20

    An apparatus and method for capturing data packets for analysis on a network computing system includes a sending node and a receiving node connected by a bi-directional communication link. The sending node sends a data transmission to the receiving node on the bi-directional communication link, and the receiving node receives the data transmission and verifies the data transmission to determine valid data and invalid data and verify retransmissions of invalid data as corresponding valid data. A memory device communicates with the receiving node for storing the invalid data and the corresponding valid data. A computing node communicates with the memory device and receives and performs an analysis of the invalid data and the corresponding valid data received from the memory device.

  18. Multidimensional signaling via wavelet packets

    NASA Astrophysics Data System (ADS)

    Lindsey, Alan R.

    1995-04-01

    This work presents a generalized signaling strategy for orthogonally multiplexed communication. Wavelet packet modulation (WPM) employs the basis functions from an arbitrary pruning of a full dyadic tree structured filter bank as orthogonal pulse shapes for conventional QAM symbols. The multi-scale modulation (MSM) and M-band wavelet modulation (MWM) schemes which have been recently introduced are handled as special cases, with the added benefit of an entire library of potentially superior sets of basis functions. The figures of merit are derived and it is shown that the power spectral density is equivalent to that for QAM (in fact, QAM is another special case) and hence directly applicable in existing systems employing this standard modulation. Two key advantages of this method are increased flexibility in time-frequency partitioning and an efficient all-digital filter bank implementation, making the WPM scheme more robust to a larger set of interferences (both temporal and sinusoidal) and computationally attractive as well.

  19. Private Land Mobile Radio Services; amendment of the commission's rules concerning mobile station, control point and control system authorization procedures for common user systems for a certain MHz frequency--Federal Communications Commission. Final rule.

    PubMed

    1982-05-05

    The Commission is amending its rules and regulations in Part 90--Private Land Mobile Radio Service, by adopting a new temporary licensing procedure for special mobile radio systems (SMRS's) and multiple licensed mobile relay stations operating in the 806-821 and the 851-866 megahertz (MHz) bands. This new system of licensing will benefit radio users by enabling them to begin operations more quickly than in the past, and will not in any way lessen the ability of the Commission to determine whether an applicant is eligible and otherwise possesses the necessary qualifications to be permanently licensed to operate in these bands. This new system is a part of the Commission's on-going program for reviewing its rules and regulations and eliminating unnecessary burdens on licensees to facilitate the administration of the Private Land Mobile Radio Service.

  20. 75 FR 66709 - Commercial Radio Operators Rules

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-10-29

    ... COMMISSION 47 CFR Parts 0, 1, 13, 80, and 87 Commercial Radio Operators Rules AGENCY: Federal Communications... radio operator licenses for maritime and aviation radio stations who perform certain functions performed within the commercial radio operators service, to determine which rules can be clarified, streamlined,...

  1. Experiments examining drag in linear droplet packets

    NASA Astrophysics Data System (ADS)

    Nguyen, Q. V.; Dunn-Rankin, D.

    1992-01-01

    This paper presents an experimental study of vertically traveling droplet packets, where the droplets in each packet are aligned linearly, one behind another. The paper describes in detail, an experimental apparatus that produces repeatable, linearly aligned, and isolated droplet packets containing 1 6 droplets per packet. The apparatus is suitable for examining aerodynamic interactions between droplets within each packet. This paper demonstrates the performance of the apparatus by examining the drag reduction and collision of droplets traveling in the wake of a lead droplet. Comparison of a calculated single droplet trajectory with the detailed droplet position versus time data for a droplet packet provides the average drag reduction experienced by the trailing droplets due to the aerodynamic wake of the lead droplet. For the conditions of our experiment (4 droplet packet, 145 μm methanol droplets, 10 m/s initial velocity, initial droplet spacing of 5.2 droplet diameters, Reynolds number approx. 80) the average drag on the first trailing droplet was found to be 75% of the drag on the lead droplet.

  2. 47 CFR 27.1255 - Relocation Criteria for Broadband Radio Service Licensees in the 2150-2160/62 MHz band.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... co-channel to the 2150-2160/62 MHz band, must relocate any incumbent BRS system that is within the... to Enable Multipoint Distribution Service and Instructional Television Fixed Service Licensees...

  3. Interconnecting network for switching data packets and method for switching data packets

    SciTech Connect

    Benner, Alan Frederic; Minkenberg, Cyriel Johan Agnes; Stunkel, Craig Brian

    2010-05-25

    The interconnecting network for switching data packets, having data and flow control information, comprises a local packet switch element (S1) with local input buffers (I(1,1) . . . I(1,y)) for buffering the incoming data packets, a remote packet switch element (S2) with remote input buffers (I(2,1) . . . I(2,y)) for buffering the incoming data packets, and data lines (L) for interconnecting the local and the remote packet switch elements (S1, S2). The interconnecting network further comprises a local and a remote arbiter (A1, A2) which are connected via control lines (CL) to the input buffers (I(1,1) . . . I(1,y), I(2,1) . . . I(2,y)), and which are formed such that they can provide that the flow control information is transmitted via the data lines (L) and the control lines (CL).

  4. Architectures and Design for Next-Generation Hybrid Circuit/Packet Networks

    NASA Astrophysics Data System (ADS)

    Vadrevu, Sree Krishna Chaitanya

    Internet traffic is increasing rapidly at an annual growth rate of 35% with aggregate traffic exceeding several Exabyte's per month. The traffic is also becoming heterogeneous in bandwidth and quality-of-service (QoS) requirements with growing popularity of cloud computing, video-on-demand (VoD), e-science, etc. Hybrid circuit/packet networks which can jointly support circuit and packet services along with the adoption of high-bit-rate transmission systems form an attractive solution to address the traffic growth. 10 Gbps and 40 Gbps transmission systems are widely deployed in telecom backbone networks such as Comcast, AT&T, etc., and network operators are considering migration to 100 Gbps and beyond. This dissertation proposes robust architectures, capacity migration strategies, and novel service frameworks for next-generation hybrid circuit/packet architectures. In this dissertation, we study two types of hybrid circuit/packet networks: a) IP-over-WDM networks, in which the packet (IP) network is overlaid on top of the circuit (optical WDM) network and b) Hybrid networks in which the circuit and packet networks are deployed side by side such as US DoE's ESnet. We investigate techniques to dynamically migrate capacity between the circuit and packet sections by exploiting traffic variations over a day, and our methods show that significant bandwidth savings can be obtained with improved reliability of services. Specifically, we investigate how idle backup circuit capacity can be used to support packet services in IP-over-WDM networks, and similarly, excess capacity in packet network to support circuit services in ESnet. Control schemes that enable our mechanisms are also discussed. In IP-over-WDM networks, with upcoming 100 Gbps and beyond, dedicated protection will induce significant under-utilization of backup resources. We investigate design strategies to loan idle circuit backup capacity to support IP/packet services. However, failure of backup circuits will

  5. Protocol Software for a Packet Voice Terminal

    DTIC Science & Technology

    1983-11-16

    III satellite. The PVTs with their attached telephone instrument serve as the interface with the voice user. The PVTs prepare speech for transmission...through a packet network by digitizing the speech, preparing speech data packets, and sending speech data messages. The PVT handles the speech coming...TOTALKin. Thes Foori alControle wilno trani speech message s unlTreessin ithas note rcenie s speehdfr ao sufficentpo toefl erAcofitt cdng atei t pfres

  6. Missions of the French Defense Radiation Protection Service Concerning The Medical Management of Radio-contaminated Patients.

    PubMed

    Gagna, G; Pégorié, A; Entine, F; Michel, X; Dondey, M; Amabile, J-C

    2016-08-01

    The French Defense Radiation Protection Service (SPRA) is an institution of the French Armed Forces (SSA) that provides technical support in radiation protection matters for French military units. It provides services for the armed forces and when necessary for the national public health system. The aim of this note is to describe the variety of services provided by the SPRA in France and abroad, not only in a military context but also in the broader field of radiation protection.

  7. Detecting the BAO using Discrete Wavelet Packets

    NASA Astrophysics Data System (ADS)

    Garcia, Noel Anthony; Wu, Yunyun; Kadowaki, Kevin; Pando, Jesus

    2017-01-01

    We use wavelet packets to investigate the clustering of matter on galactic scales in search of the Baryon Acoustic Oscillations. We do so in two ways. We develop a wavelet packet approach to measure the power spectrum and apply this method to the CMASS galaxy catalogue from the Sloan Digital Sky Survey (SDSS). We compare the resulting power spectrum to published BOSS results by measuring a parameter β that compares our wavelet detected oscillations to the results from the SDSS collaboration. We find that β=1 indicating that our wavelet packet methods are detecting the BAO at a similar level as traditional Fourier techniques. We then use wavelet packets to decompose, denoise, and then reconstruct the galaxy density field. Using this denoised field, we compute the standard two-point correlation function. We are able to successfully detect the BAO at r ≈ 105 h-1 Mpc in line with previous SDSS results. We conclude that wavelet packets do reproduce the results of the key clustering statistics computed by other means. The wavelet packets show distinct advantages in suppressing high frequency noise and in keeping information localized.

  8. Moving the boundary between wavelength resources in optical packet and circuit integrated ring network.

    PubMed

    Furukawa, Hideaki; Miyazawa, Takaya; Wada, Naoya; Harai, Hiroaki

    2014-01-13

    Optical packet and circuit integrated (OPCI) networks provide both optical packet switching (OPS) and optical circuit switching (OCS) links on the same physical infrastructure using a wavelength multiplexing technique in order to deal with best-effort services and quality-guaranteed services. To immediately respond to changes in user demand for OPS and OCS links, OPCI networks should dynamically adjust the amount of wavelength resources for each link. We propose a resource-adjustable hybrid optical packet/circuit switch and transponder. We also verify that distributed control of resource adjustments can be applied to the OPCI ring network testbed we developed. In cooperation with the resource adjustment mechanism and the hybrid switch and transponder, we demonstrate that automatically allocating a shared resource and moving the wavelength resource boundary between OPS and OCS links can be successfully executed, depending on the number of optical paths in use.

  9. Comparison of Ring-Buffer-Based Packet Capture Solutions

    SciTech Connect

    Barker, Steven Andrew

    2015-10-01

    Traditional packet-capture solutions using commodity hardware incur a large amount of overhead as packets are copied multiple times by the operating system. This overhead slows sensor systems to a point where they are unable to keep up with high bandwidth traffic, resulting in dropped packets. Incomplete packet capture files hinder network monitoring and incident response efforts. While costly commercial hardware exists to capture high bandwidth traffic, several software-based approaches exist to improve packet capture performance using commodity hardware.

  10. A Two-Phase Survey of the Impact of Radio and Television Public Service Announcements. Final Report.

    ERIC Educational Resources Information Center

    Market Facts, Washington, DC.

    This evaluation was designed to assess the effectiveness of an information campaign conducted in seven selected areas of the country to promote public awareness and use of services provided by the National Library Service for the Blind and Handicapped (NLS) for individuals with reading difficulties. The principal campaign medium consisted of…

  11. Radio Days.

    ERIC Educational Resources Information Center

    Sanderson, Neil

    1998-01-01

    Thousands of today's high school students run FM radio stations at school, carrying on a tradition that began 50 years ago. Radio helps students learn to work with others and develop a strong sense of responsibility. A sidebar gives advice on starting a high school radio station. (MLF)

  12. Design and implementation considerations of a MSAT packet data network

    NASA Astrophysics Data System (ADS)

    Karam, Fouad G.; Hearn, Terry; Rohr, Doug; Guibord, Arthur F.

    The Mobile Data System, which is intended to provide for packet switched data services is currently under development. The system is based on a star network topology consisting of a centralized Data Hub (DH) serving a large number of mobile terminals. Through the Data Hub, end-to-end connections can be established between terrestrial users on public or private data networks and mobile users. The MDS network will be capable of offering a variety of services some of which are based on the standard X.25 network interface protocol, and others optimized for short messages and broadcast messages. A description of these services and the trade-offs in the DH design are presented.

  13. Design and implementation considerations of a MSAT packet data network

    NASA Technical Reports Server (NTRS)

    Karam, Fouad G.; Hearn, Terry; Rohr, Doug; Guibord, Arthur F.

    1993-01-01

    The Mobile Data System, which is intended to provide for packet switched data services is currently under development. The system is based on a star network topology consisting of a centralized Data Hub (DH) serving a large number of mobile terminals. Through the Data Hub, end-to-end connections can be established between terrestrial users on public or private data networks and mobile users. The MDS network will be capable of offering a variety of services some of which are based on the standard X.25 network interface protocol, and others optimized for short messages and broadcast messages. A description of these services and the trade-offs in the DH design are presented.

  14. Good Grooming. Cooperative Work Experience Learning Activity Packet: Series on Job Entry and Adjustment; Packet Four.

    ERIC Educational Resources Information Center

    Herschbach, Dennis R.; And Others

    This student booklet is fourth in an illustrated series of eleven learning activity packets for use in teaching job hunting and application procedures and the management of wages to secondary students. Two units are included in this packet, one covering proper dress and grooming for the interview, and the other appearance on the job. Suggestions…

  15. Radiology/Imaging. Clinical Rotation. Instructor's Packet and Student Study Packet.

    ERIC Educational Resources Information Center

    Texas Univ., Austin. Extension Instruction and Materials Center.

    The instructor's packet, the first of two packets, is one of a series of materials designed to help students who are investigating the activities within a radiology department or considering any of the imaging technologies as a career. The material is designed to relate training experience to information studied in the classroom. This packet…

  16. Dynamics of Attosecond Electron Wave Packets

    NASA Astrophysics Data System (ADS)

    Mauritsson, Johan

    2005-05-01

    We present results from some of the first experimental studies of attosecond electron wave packets created via the absorption of ultrashort extreme ultraviolet (XUV) light pulses [1]. The pulses, made via high harmonic generation, form an attosecond pulse train (APT) whose properties we can manipulate by a combination of spatial and spectral filtering. For instance, we show that on-target attosecond pulses of 170 as duration, which is close to the single cycle limit, can be produced [2]. The electron wave packets created when such an APT is used to ionize an atom are different from the tunneling wave packets familiar from strong field ionization. We show how to measure the dynamics of these wave packets in a strong infrared (IR) field, where the absorption of energy above the ionization threshold is found to depend strongly on the APT-IR delay [3]. We also demonstrate that altering the properties of the initial electron wave packet by manipulating the APT changes the subsequent continuum electron dynamics. Finally, we show how the phase of a longer, femtosecond electron wave packet can be modulated by a moderately strong IR pulse with duration comparable to or shorter than that of the electron wave packet. This experiment reveals how the normal ponderomotive shift of an XUV ionization event is modified when the IR pulse is shorter than the XUV pulse.[1] The experiments were done at Lund Institute of Technology, Sweden.[2] R. López-Martens, et al., Phys. Rev. Lett. 94, 033001 (2005)[3] P. Johnsson, et al., submitted to Phys. Rev. Lett.

  17. Atomic Electron Wave Packet Interference and Control

    NASA Astrophysics Data System (ADS)

    Noel, Michael W.

    We have used a train of picosecond laser pulses to excite an atomic electron into a coherent superposition of radially localized wave packets. Such superpositions were used in three separate experiments to study interference and control of atomic electron wave packets. The first experiment is an analog of Young's double -slit interferometer using an atomic electron instead of light. The superposition for this experiment consists of two wave packets coherently excited on opposite sides of a common Kepler orbit, which mimic the pair of slits used in Young's experiment. The two wave packets propagate and spread until they completely overlap, then a third laser pulse probes the resulting fringe pattern. The relative phase of the two wave packet can be varied so that the interference produces a single localized electron wave packet on one side of the orbit or the other. In the second experiment we study the same superposition of two separated wave packets, but this time in an analogy to Schrodinger's coherent superposition of live and dead cat. State selective field ionization is used to verify that only every other atomic level is populated in the cat state, and a Ramsey fringe measurement is used to demonstrate the coherence of the superposition. In the third experiment we have made use of the interference studied in the first two in an effort to control the radial distribution of the electron. This is done by controlling the quantum state distribution that is excited with a train of laser pulses. We have developed this control theory for the weak field case to show the simple and unique solutions that result. We have also demonstrated this type of control by showing how the state distribution can be modified for the simple case of a train of three pulses.

  18. 78 FR 2077 - Implementation of the Local Community Radio Act of 2010; Revision of Service and Eligibility...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-09

    ... bona fide complaints should state the nature and location of the alleged interference, the call letters... complainants to specify: (1) The call signs of the LPFM station and the affected full-service FM, FM...

  19. 47 CFR 95.33 - Cooperative use of radio stations in the GMRS.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Cooperative use of radio stations in the GMRS... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.33 Cooperative use of radio stations in the GMRS. (a) Licensees (a licensee is the entity to which the license is...

  20. 47 CFR 95.33 - Cooperative use of radio stations in the GMRS.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Cooperative use of radio stations in the GMRS... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.33 Cooperative use of radio stations in the GMRS. (a) Licensees (a licensee is the entity to which the license is...

  1. 47 CFR 95.33 - Cooperative use of radio stations in the GMRS.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Cooperative use of radio stations in the GMRS... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.33 Cooperative use of radio stations in the GMRS. (a) Licensees (a licensee is the entity to which the license is...

  2. 47 CFR 95.33 - Cooperative use of radio stations in the GMRS.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Cooperative use of radio stations in the GMRS... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES General Mobile Radio Service (GMRS) § 95.33 Cooperative use of radio stations in the GMRS. (a) Licensees (a licensee is the entity to which the license is...

  3. Firefighters' Radios

    NASA Technical Reports Server (NTRS)

    1976-01-01

    Public Technology Inc. asked for NASA assistance to devise the original firefighter's radio. Good short-range radio communications are essential during a fire to coordinate hose lines, rescue victims, and otherwise increase efficiency. Useful firefighting tool is lower cost, more rugged short range two-way radio. Inductorless electronic circuit replaced inductances and coils in radio circuits with combination of transistors and other low-cost components. Substitution promises reduced circuit size and cost. Enhanced electrical performance made radio more durable and improved maintainability by incorporating modular construction.

  4. 47 CFR 95.628 - MedRadio transmitters.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false MedRadio transmitters. 95.628 Section 95.628 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.628 MedRadio transmitters. (a) Frequency...

  5. 47 CFR 95.628 - MedRadio transmitters.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false MedRadio transmitters. 95.628 Section 95.628 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.628 MedRadio transmitters. (a) Frequency...

  6. Memo to All Young People Interested in Radio.

    ERIC Educational Resources Information Center

    Federal Communications Commission, Washington, DC.

    Unlicensed radio operation may interfere with regular broadcast reception and radio communication for safety services. In this bulletin, the Federal Communications Commission (FCC) advises teenagers not to violate the law, but to pursue their interest in radio broadcast by joining the Amateur Radio Service or qualifying for a commercial permit.…

  7. An overview of packet-switching communications

    NASA Astrophysics Data System (ADS)

    Heggestad, H. M.

    1984-04-01

    A brief introduction is provided to an alternative computer-based technique for connecting a source to a destination, one which is not an evolutionary improvement in circuit switching but a radical departure from traditional techniques, namely packet switching. It is noted that this mechanism is becoming firmly established as a method for communicating digital data. Advances are also being made rapidly in the transmission of voice by this means, and packet switching may in fact be ideal for some future systems in which voice and data are fully integrated. The distinguishing feature of a packet-switched system is that a computer organizes outgoing digital information into segments which make their way independently to the receiving stations. Here, other computers reassemble them into replicas of the original message. One of the objectives conveniently achieved by packet systems is robustness with respect to blockage on particular links in the network. It is pointed out that two significant limitations affect the design and use of packet-switched systems; one is the need for substantial computer processing and bit manipulation at the network nodes, the other is accumulation of delay for real-time traffic.

  8. 78 FR 10263 - Proposed Collection; Comment Request for ADA Accommodations Request Packet

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-13

    ... Internal Revenue Service Proposed Collection; Comment Request for ADA Accommodations Request Packet AGENCY... U.S.C. 3506(c)(2)(A)). Currently, the IRS is soliciting comments concerning the ADA Accommodations... through the Internet, at Martha.R.Brinson @irs.gov. SUPPLEMENTARY INFORMATION: Title: ADA...

  9. Investigation of a Neural Network Implementation of a TCP Packet Anomaly Detection System

    DTIC Science & Technology

    2004-05-01

    as the range 1024–65535. Some types of port scans may be detected through this attribute, as well as trojans and distributed denial of service (DDoS...Summary of DARPA 1999 week 5 detects. Date Attack Classifier Details 04/05/99 Portsweep Flags Lone FIN packets Sequence # SEQ=ACK=0 04/05/99 Neptune DoS IP...port (final stage of attack) 04/06/99 Neptune DoS IP Private IP address 10.20.30.40 Flags SYN packets with low source ports Ports Low ports to low

  10. Packet Testing in Free-Space Optical Communication Links Over Water

    DTIC Science & Technology

    2006-01-01

    performance over the 16 km one-way range at the LCTF. There are several methods to determine the link quality in FSO lasercom. Bit- error -rate (BER...testing and packet testing are two possible methods. Since errors generally tend to occur in bursts in FSO channels, packet testing may offer a...determine how to best describe the quality of service (QoS) of a FSO lasercom link because of the burst nature of the errors in FSO channels. The LCTF

  11. Digital transceiver implementation for wavelet packet modulation

    NASA Astrophysics Data System (ADS)

    Lindsey, Alan R.; Dill, Jeffrey C.

    1998-03-01

    Current transceiver designs for wavelet-based communication systems are typically reliant on analog waveform synthesis, however, digital processing is an important part of the eventual success of these techniques. In this paper, a transceiver implementation is introduced for the recently introduced wavelet packet modulation scheme which moves the analog processing as far as possible toward the antenna. The transceiver is based on the discrete wavelet packet transform which incorporates level and node parameters for generalized computation of wavelet packets. In this transform no particular structure is imposed on the filter bank save dyadic branching, and a maximum level which is specified a priori and dependent mainly on speed and/or cost considerations. The transmitter/receiver structure takes a binary sequence as input and, based on the desired time- frequency partitioning, processes the signal through demultiplexing, synthesis, analysis, multiplexing and data determination completely in the digital domain - with exception of conversion in and out of the analog domain for transmission.

  12. 47 CFR 25.144 - Licensing provisions for the 2.3 GHz satellite digital audio radio service.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space Stations § 25... station or begin space station construction; (2) Two years: If applied for, complete contracting for construction of second space station or begin second space station construction; (3) Four years: In...

  13. 47 CFR 25.144 - Licensing provisions for the 2.3 GHz satellite digital audio radio service.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space Stations § 25... station or begin space station construction; (2) Two years: If applied for, complete contracting for construction of second space station or begin second space station construction; (3) Four years: In...

  14. 47 CFR 25.144 - Licensing provisions for the 2.3 GHz satellite digital audio radio service.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space Stations § 25... authorization: (1) One year: Complete contracting for construction of first space station or begin space station construction; (2) Two years: If applied for, complete contracting for construction of second space station...

  15. 47 CFR 25.144 - Licensing provisions for the 2.3 GHz satellite digital audio radio service.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... (CONTINUED) COMMON CARRIER SERVICES SATELLITE COMMUNICATIONS Applications and Licenses Space Stations § 25... station or begin space station construction; (2) Two years: If applied for, complete contracting for construction of second space station or begin second space station construction; (3) Four years: In...

  16. 47 CFR 1.1152 - Schedule of annual regulatory fees and filing locations for wireless radio services.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... COMMISSION GENERAL PRACTICE AND PROCEDURE Schedule of Statutory Charges and Procedures for Payment § 1.1152... (per license) Fee amount 1 Address 1. Land Mobile (Above 470 MHz and 220 MHz Local, Base Station & SMRS.... Louis, MO 63197-9000. 4. Shared Use Services Land Mobile (Frequencies Below 470 MHz—except 220 MHz)...

  17. A versatile model for packet loss visibility and its application to packet prioritization.

    PubMed

    Lin, Ting-Lan; Kanumuri, Sandeep; Zhi, Yuan; Poole, David; Cosman, Pamela C; Reibman, Amy R

    2010-03-01

    In this paper, we propose a generalized linear model for video packet loss visibility that is applicable to different group-of-picture structures. We develop the model using three subjective experiment data sets that span various encoding standards (H.264 and MPEG-2), group-of-picture structures, and decoder error concealment choices. We consider factors not only within a packet, but also in its vicinity, to account for possible temporal and spatial masking effects. We discover that the factors of scene cuts, camera motion, and reference distance are highly significant to the packet loss visibility. We apply our visibility model to packet prioritization for a video stream; when the network gets congested at an intermediate router, the router is able to decide which packets to drop such that visual quality of the video is minimally impacted. To show the effectiveness of our visibility model and its corresponding packet prioritization method, experiments are done to compare our perceptual-quality-based packet prioritization approach with existing Drop-Tail and Hint-Track-inspired cumulative-MSE-based prioritization methods. The result shows that our prioritization method produces videos of higher perceptual quality for different network conditions and group-of-picture structures. Our model was developed using data from high encoding-rate videos, and designed for high-quality video transported over a mostly reliable network; however, the experiments show the model is applicable to different encoding rates.

  18. Packet radar spectrum recovery for physiological signals.

    PubMed

    Yavari, Ehsan; Padasdao, Bryson; Lubecke, Victor; Boric-Lubecke, Olga

    2013-01-01

    Packet Doppler radar is investigated for extracting physiological signals. System on Chip is employed as a signal source in packet mode, and it transmits signals intermittently at 2.405 GHz to save power. Reflected signals are demodulated directly by spectral analysis of received pulses in the baseband. Spectral subtraction, using data from an empty room, is applied to extract the periodic movement. It was experimentally demonstrated that frequency of the periodic motion can be accurately extracted using this technique. Proposed approach reduces the computation complexity of the signal processing part effectively.

  19. Wavelet and wavelet packet compression of electrocardiograms.

    PubMed

    Hilton, M L

    1997-05-01

    Wavelets and wavelet packets have recently emerged as powerful tools for signal compression. Wavelet and wavelet packet-based compression algorithms based on embedded zerotree wavelet (EZW) coding are developed for electrocardiogram (ECG) signals, and eight different wavelets are evaluated for their ability to compress Holter ECG data. Pilot data from a blind evaluation of compressed ECG's by cardiologists suggest that the clinically useful information present in original ECG signals is preserved by 8:1 compression, and in most cases 16:1 compressed ECG's are clinically useful.

  20. Ray Curvature and Refraction of Wave Packets.

    DTIC Science & Technology

    1978-09-01

    1!~~~~~ _ ‘ AD AOM 302 FLORIDA STATE UNIV TALLAHASSEE DEPT OF OCEANOGRAPHY FIG B/3 RAY CURVATURE AND REFRACTION OF WAVE PACKETS. (U) SEP 78 .J E...BREEDING N00014—77—C—0329 UNCLASSIFIED TR JE6 3 NL _ _ _ rwii__ _ ~iU ir!I I -~~ RAYOJR\\1L~[UREAND REFRACI ION OF WAVE F1~\\CKET~S ~y J. Ernest Breeding...01 29 014 -~ Technical Report No. JEB-3 Department of Oceanography • Florida State University RAY CURVATURE AND REFRACTION OF WAVE PACKETS b O G • J

  1. Radio frequency spectrum management

    NASA Astrophysics Data System (ADS)

    Sujdak, E. J., Jr.

    1980-03-01

    This thesis is a study of radio frequency spectrum management as practiced by agencies and departments of the Federal Government. After a brief introduction to the international agency involved in radio frequency spectrum management, the author concentrates on Federal agencies engaged in frequency management. These agencies include the National Telecommunications and Information Administration (NTIA), the Interdepartment Radio Advisory Committee (IRAC), and the Department of Defense (DoD). Based on an analysis of Department of Defense frequency assignment procedures, recommendations are given concerning decentralizing military frequency assignment by delegating broader authority to unified commanders. This proposal includes a recommendation to colocate the individual Service frequency management offices at the Washington level. This would result in reduced travel costs, lower manpower requirements, and a common tri-Service frequency management data base.

  2. Allocations by the 1992 World Administrative Radio Conference

    NASA Technical Reports Server (NTRS)

    Heyward, Ann O.

    1992-01-01

    An overview of the 1992 World Administrative Radio Conference is presented with viewgraphs. Allocations of radio frequency spectrum are addressed. Mobile satellite service, broadcast satellite service, and uplink power control beacons are also addressed.

  3. All-optical packet header and payload separation for un-slotted optical packet switched networks

    NASA Astrophysics Data System (ADS)

    Ji, Wei; Zhang, Min; Ye, Peida

    2005-11-01

    A novel all-optical header and payload separation technique that can be utilized in un-slotted optical packet switched networks is presented. The technique uses a modified TOAD for packet header extraction with differential modulation scheme and two SOAs that perform a simple XOR operation between the packet and its self-derived header to get the separated payload. The main virtue of this system is simple structure and need not any additional continuous pulses. Through numerical simulations, the operating characteristics of the scheme are illustrated. In addition, the parameters of the system are discussed and designed to optimize the operation performance.

  4. Nanotube Radio

    NASA Astrophysics Data System (ADS)

    Jensen, Kenneth; Weldon, Jeff; Garcia, Henry; Zettl, Alex

    2008-03-01

    We have constructed a fully functional, fully integrated radio receiver from a single carbon nanotube. The nanotube serves simultaneously as all essential components of a radio: antenna, tunable band-pass filter, amplifier, and demodulator. A direct current voltage source, as supplied by a battery, powers the radio. Using carrier waves in the commercially relevant 40-400 MHz range and both frequency and amplitude modulation techniques, we demonstrate successful music and voice reception.

  5. Radio Science

    NASA Technical Reports Server (NTRS)

    1984-01-01

    Radio science experiments use electromagnetic waves to probe or study the solar system. Three major research areas were identified within this discipline: radio astronomy, radar astronomy, and celestial mechanics. Radio astronomy (or radiometry) is the detection and measurement of naturally produced radio frequency emissions. Sources include surfaces, atmospheres, rings, and plasmas. Radar astronomy is the observation of man-made signals after their interaction with a target. Both imaging and non-imaging results. Celestial mechanics includes all studies related to the motions of (and gravity fields of) bodies within the solar system. These should not be considered rigid separations, but aid in the discussion of the data sets.

  6. Towards secondary use of heterogeneous radio-oncological data for retrospective clinical trials: service-oriented connection of a central research database with image analysis tools

    NASA Astrophysics Data System (ADS)

    Bougatf, Nina; Bendl, Rolf; Debus, Jürgen

    2015-03-01

    Our overall objective is the utilization of heterogeneous and distributed radio-oncological data in retrospective clinical trials. Previously, we have successfully introduced a central research database for collection of heterogeneous data from distributed systems. The next step is the integration of image analysis tools in the standard retrieval process. Hence, analyses for complex medical questions can be processed automatically and facilitated immensely. In radiation oncology recurrence analysis is a central approach for the evaluation of therapeutic concepts. However, various analysis steps have to be performed like image registration, dose transformation and dose statistics. In this paper we show the integration of image analysis tools in the standard retrieval process by connecting them with our central research database using a service-oriented approach. A concrete problem from recurrence analysis has been selected to prove our concept exemplarily. We implemented service-oriented data collection and analysis tools to use them in a central analysis platform, which is based on a work flow management system. An analysis work flow has been designed that, at first, identifies patients in the research database fulfilling the inclusion criteria. Then the relevant imaging data is collected. Finally the imaging data is analyzed automatically. After the successful work flow execution, the results are available for further evaluation by a physician. As a result, the central research database has been connected successfully with automatic data collection and image analysis tools and the feasibility of our service-oriented approach has been demonstrated. In conclusion, our approach will simplify retrospective clinical trials in our department in future.

  7. Amateur Radio on the International Space Station - the First Operational Payload on the ISS

    NASA Astrophysics Data System (ADS)

    Bauer, F. H.; McFadin, L.; Steiner, M.; Conley, C. L.

    2002-01-01

    on three Shuttle flights and one Progress flight. The initial educational outreach system supports voice and packet (computer-to-computer radio link) capabilities. In addition, two Extra Vehicular Activities (EVAs) have been completed to install two antenna systems. These antenna systems were designed to be shared between the amateur radio equipment and a Russian EVA television system. These new antenna systems will ultimately enable a key facet of the amateur radio station to move into the Service Module living quarters, providing a more comfortable station set up for the ISS crew. In the future, ARISS hopes to fly a Slow Scan Television system on board the ISS as well as developing new systems for external mounting on the ISS. This paper will discuss the development, qualification, installation and operation of the ARISS amateur radio system. It will also discuss some of the challenges that the ARISS- international team of volunteers overcame to bring its first phase of equipment on ISS to fruition.

  8. Opportunistic Packet Scheduling in Cellular Networks with Base Station Antenna Arrays

    DTIC Science & Technology

    2006-01-01

    ORGANIZATION NAME(S) AND ADDRESS(ES) University of Maryland, College Park,Department of Electrical & Computer Engineering,College Park,MD,20742 8...Department of Electrical & Computer Engineering University of Maryland, College Park rtm,hyongla@eng.umd.edu Abstract We study the issue of designing a...transition from the traditional circuit switched voice services to packet switched data services during the past decade. Increasing demand for fast wireless

  9. Regulatory policies and procedures for the Domestic Public Land Mobile Radio Service--Federal Communications Commission. Proposed rule.

    PubMed

    1983-03-03

    Policies and procedures concerning objective need showings for applications requesting an additional one-way frequency for one-way signaling stations are being proposed. The present rules do not provide applicants with sufficient information as to what is required in need showings before applications can be granted. Applicants requesting an additional one-way frequency must show that the existing or projected grade of service is .50 before an additional channel is granted. The proposed standards are concurrently being adopted as an interim rule.

  10. The Air We Breathe. Activity Packet.

    ERIC Educational Resources Information Center

    Connecticut State Dept. of Environmental Protection, Hartford.

    This packet of materials is intended to provide teachers with an interdisciplinary approach to integrating air quality education into the existing curriculum of Connecticut schools. The unit is designed to complement the student booklet "The Air We Breathe," which is included. A major portion of the document is comprised of teaching…

  11. Cashier/Checker Learning Activity Packets (LAPs).

    ERIC Educational Resources Information Center

    Oklahoma State Dept. of Vocational and Technical Education, Stillwater. Curriculum and Instructional Materials Center.

    Twenty-four learning activity packets (LAPs) are provided for six areas of instruction in a cashier/checker program. Section A, Orientation, contains an LAP on exploring the job of cashier-checker. Section B, Operations, has nine LAPs, including those on operating the cash register, issuing trading stamps, and completing the cash register balance…

  12. Yorktown Victory Center Museum Teacher Resource Packet.

    ERIC Educational Resources Information Center

    Jamestown-Yorktown Foundation, Williamsburg, VA. Education Dept.

    This resource packet provides information and activities for teaching abut the historical significance of Yorktown, Virginia in the American Revolution. Teachers' materials include brief background essays on: (1) "Summary of the American Revolution in Virginia"; (2) "Life in the Army"; (3) "Life in Revolutionary…

  13. Peninsula Humane Society Teacher's Packet. Secondary Level.

    ERIC Educational Resources Information Center

    Peninsula Humane Society, San Mateo, CA.

    Activities in this teacher's packet are designed to familiarize secondary school students with the responsibilities involved in pet ownership. Teaching plans are provided for a total of 12 lessons grouped under social studies, language arts, math, and health sciences. Activities focus on pet overpopulation, expressions of social responses in…

  14. Queueing Analysis For Packet Switched Video

    NASA Astrophysics Data System (ADS)

    Sen, Prodip; Rikli, Nasser; Maglaris, Basil

    1987-10-01

    Packet switching of variable bit-rate real-time video sources is a means for the efficient sharing of communication resources, while maintaining a uniform picture quality. Performance analyses for the statistical multiplexing of such video sources are required as a first step towards assessing the feasibility of packet switched video. This paper extends our earlier work in modelling video sources which have been coded using inter-frame coding schemes, and in carrying out buffer queueing analyses for the multiplexing of several such sources. Our previous models and analysis were suitable for relatively uniform activity scenes. Here we consider models and queueing analysis for more realistic scenes with multiple activity levels where the coder output bit-rates may change violently. We present correlated Markov source models for the corresponding sources, and using a flow-equivalent queueing analysis, obtain common buffer queue distributions and probabilities of packet loss. Our results demonstrate efficient resource sharing of packetized video on a single link, due to the smoothing effect of multiplexing several variable-rate video sources.

  15. The Nutcracker--Theater Activity Packet.

    ERIC Educational Resources Information Center

    New York City Board of Education, Brooklyn, NY. Div. of Curriculum and Instruction.

    A part of the New York City Board of Education Early Stages educational program, this activity packet was developed to assist teachers in preparing students for viewing the American Ballet Theatre's production of "The Nutcracker." The guide begins with a section on preparing for the performance, and includes information on the Early…

  16. Humane Education Teachers' Packet (Preschool & Kindergarten).

    ERIC Educational Resources Information Center

    Sammut-Tovar, Dorothy

    Designed to sensitize preschoolers and kindergartners to the responsibilities involved in caring for living things, this teacher's packet provides a variety of student worksheets and activity suggestions. Teaching plans are provided for a total of nine lessons, which can be easily integrated into other learning areas such as numbers, colors,…

  17. The World Around You. Environmental Education Packet.

    ERIC Educational Resources Information Center

    Garden Club of America, New York, NY.

    The Garden Club of America has compiled this environmental education packet of informational materials to help teachers educate their students for survival. The "Study Guide" contains essays by ten authorities on topics of population, soil, air, water, power and energy, solid waste management, open space, public lands, oceans, and wildlife. Each…

  18. Student Problems. Adult Literacy Independent Learning Packet.

    ERIC Educational Resources Information Center

    Koefer, Ann M.

    This independent learning packet, which is designed for administrators, teachers, counselors, and tutors in Pennsylvania's Region 7 Tri-Valley Literacy Staff Development area as well as for their adult students, examines the following seven problems encountered by students: the job market, child care, single parenting/parenting skills, divorce,…

  19. Biological Diversity. Global Issues Education Packet.

    ERIC Educational Resources Information Center

    Holm, Amy E.

    Biological diversity, also commonly called genetic diversity, refers to the variety of organisms on Earth. Scientists are concerned that many species will become extinct because of extensive development in the tropical regions. This packet is designed to increase student's awareness about direct and indirect causes of extinction, endangered…

  20. Solid Waste Activity Packet for Teachers.

    ERIC Educational Resources Information Center

    Illinois Univ., Urbana. Cooperative Extension Service.

    This solid waste activity packet introduces students to the solid waste problem in Illinois. Topics explore consumer practices in the market place, packaging, individual and community garbage generation, and disposal practices. The activities provide an integrated approach to incorporating solid waste management issues into subject areas. The…

  1. Metro College for Living. Workshop Packet.

    ERIC Educational Resources Information Center

    Kreps, Alice Roelofs

    This packet contains information and materials for conducting a training workshop for working with adults who are developmentally disabled. The materials are specifically designed to train volunteer teachers in the College for Living (CFL) program, which supplements residential programs in and around Denver and aids institutions in orienting…

  2. PROJECT SUCCESS: Art. (Introductory Packet, Drawing, Claywork, Painting).

    ERIC Educational Resources Information Center

    Petersen, Nancy

    Four packets comprise the art component of an enrichment program for gifted elementary students. The introduction packet reviews identification of children gifted in art through pre and post measures. A drawing packet reviews techniques for such activities as human figure drawing, shading, crayon rubbinqs, experimenting with perspective, and…

  3. College Radio.

    ERIC Educational Resources Information Center

    Sauls, Samuel J.

    As with commercial stations, the underlying premise of the college radio station is to serve the community, whether it be the campus community or the community at large, but in unique ways often geared to underserved niches of the population. Much of college radio's charm lies in its unpredictable nature and constant mutations. The stations give…

  4. Radio astronomy

    NASA Technical Reports Server (NTRS)

    Taylor, R. M.; Manchester, R. N.

    1980-01-01

    The activities of the Deep Space Network in support of radio and radar astronomy operations during July and August 1980 are reported. A brief update on the OSS-sponsored planetary radio astronomy experiment is provided. Also included are two updates, one each from Spain and Australia on current host country activities.

  5. Radio stars.

    PubMed

    Hjellming, R M; Wade, C M

    1971-09-17

    Up to the present time six classes of radio stars have been established. The signals are almost always very faint and drastically variable. Hence their discovery has owed as much to serendipity as to the highly sophisticated equipment and techniques that have been used. When the variations are regular, as with the pulsars, this characteristic can be exploited very successfully in the search for new objects as well as in the detailed study of those that are already known. The detection of the most erratically variable radio stars, the flare stars and the x-ray stars, is primarily a matter of luck and patience. In the case of the novas, one at least knows where and oughly when to look for radio emission. A very sensitive interferometer is clearly the best instrument to use in the initial detection of a radio star. The fact that weak background sources are frequently present makes it essential to prove that the position of a radio source agrees with that of a star to within a few arc seconds. The potential of radio astronomy for the study of radio stars will not be realized until more powerful instruments than those that are available today can be utilized. So far, we have been able to see only the most luminous of the radio stars.

  6. Segregation of helicity in inertial wave packets

    NASA Astrophysics Data System (ADS)

    Ranjan, A.

    2017-03-01

    Inertial waves are known to exist in the Earth's rapidly rotating outer core and could be important for the dynamo generation. It is well known that a monochromatic inertial plane wave traveling parallel to the rotation axis (along positive z ) has negative helicity while the wave traveling antiparallel (negative z ) has positive helicity. Such a helicity segregation, north and south of the equator, is necessary for the α2-dynamo model based on inertial waves [Davidson, Geophys. J. Int. 198, 1832 (2014), 10.1093/gji/ggu220] to work. The core is likely to contain a myriad of inertial waves of different wave numbers and frequencies. In this study, we investigate whether this characteristic of helicity segregation also holds for an inertial wave packet comprising waves with the same sign of Cg ,z, the z component of group velocity. We first derive the polarization relations for inertial waves and subsequently derive the resultant helicity in wave packets forming as a result of superposition of two or more waves. We find that the helicity segregation does hold for an inertial wave packet unless the wave numbers of the constituent waves are widely separated. In the latter case, regions of opposite color helicity do appear, but the mean helicity retains the expected sign. An illustration of this observation is provided by (a) calculating the resultant helicity for a wave packet formed by superposition of four upward-propagating inertial waves with different wave vectors and (b) conducting the direct numerical simulation of a Gaussian eddy under rapid rotation. Last, the possible effects of other forces such as the viscous dissipation, the Lorentz force, buoyancy stratification, and nonlinearity on helicity are investigated and discussed. The helical structure of the wave packet is likely to remain unaffected by dissipation or the magnetic field, but can be modified by the presence of linearly stable stratification and nonlinearity.

  7. Capacity allocation mechanism based on differentiated QoS in 60 GHz radio-over-fiber local access network

    NASA Astrophysics Data System (ADS)

    Kou, Yanbin; Liu, Siming; Zhang, Weiheng; Shen, Guansheng; Tian, Huiping

    2017-03-01

    We present a dynamic capacity allocation mechanism based on the Quality of Service (QoS) for different mobile users (MU) in 60 GHz radio-over-fiber (RoF) local access networks. The proposed mechanism is capable for collecting the request information of MUs to build a full list of MU capacity demands and service types at the Central Office (CO). A hybrid algorithm is introduced to implement the capacity allocation which can satisfy the requirements of different MUs at different network traffic loads. Compared with the weight dynamic frames assignment (WDFA) scheme, the Hybrid scheme can keep high priority MUs in low delay and maintain the packet loss rate less than 1% simultaneously. At the same time, low priority MUs have a relatively better performance.

  8. 47 CFR 95.627 - MedRadio transmitters in the 401-406 MHz band.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false MedRadio transmitters in the 401-406 MHz band... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.627 MedRadio transmitters in the 401-406 MHz band. The following provisions apply only to MedRadio transmitters operating...

  9. 47 CFR 95.627 - MedRadio transmitters in the 401-406 MHz band.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false MedRadio transmitters in the 401-406 MHz band... SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Technical Regulations Technical Standards § 95.627 MedRadio transmitters in the 401-406 MHz band. The following provisions apply only to MedRadio transmitters operating...

  10. Effect of Coulomb interaction on multi-electronwave packet dynamics

    SciTech Connect

    Shiokawa, T.; Takada, Y.; Konabe, S.; Hatsugai, Y.; Muraguchi, M.; Endoh, T.; Shiraishi, K.

    2013-12-04

    We have investigated the effect of Coulomb interaction on electron transport in a one-dimensional nanoscale structure using a multi-electron wave packet approach. To study the time evolution, we numerically solve the time-dependent Hartree-Fock equation, finding that the electron wave packet dynamics strongly depends on the Coulomb interaction strength. When the Coulomb interaction is large, each electron wave packet moves separately in the presence of an electric field. With weak Coulomb interaction, however, the electron wave packets overlap, forming and moving as one collective wave packet.

  11. On Best-Effort Packet Reordering for Mitigating the Effects of Out-of-Order Delivery on Unmodified TCP

    NASA Astrophysics Data System (ADS)

    Lane, John Russell; Nakao, Akihiro

    Multipath routing and the ability to simultaneously use multiple network paths has long been proposed as a means for meeting the reliability and performance improvement goals of a next generation Internet. However, its use causes out-of-order packet delivery, which is well known to hinder TCP performance. While next-generation transport protocols will no doubt better cope with this phenomenon, a complete switch to these new protocols cannot be made on all devices “overnight” the reality is that we will be forced to continue using TCP on such multipath networks well after deployment of a future Internet is complete.In this paper, we investigate the use of best-effort packet reordering — an optional network layer service for improving the performance of any TCP session in the presence of out-of-order packet delivery. Such a service holds the promise of allowing unmodified TCP to take advantage of the reliability and performance gains offered by a future multipath-enabled Internet without suffering the adverse performance effects commonly associated with out-of-order packet delivery. Our experiments test the performance of two common TCP variants under packet dispersion with differing numbers of paths and amounts of inter-path latency variance. They were conducted using multipath network and packet reorderer implementations implemented within the Emulab testbed. Our results demonstrate that a simple best-effort reordering service can insulate TCP from the type of reordering that might be expected from use of packet dispersion over disjoint paths in a wide-area network, and is capable of providing significant performance benefits with few ill side-effects.

  12. Transporting live video over high packet loss networks

    NASA Astrophysics Data System (ADS)

    Werdin, Dave

    2013-05-01

    Transport of live video requires a robust backbone as live video decoders are subject to dropouts and buffer starvation. A short duration packet loss will many times cause a decoder to go black for many seconds as it reacquires the stream and clock. IP networks due to their connectionless approach and support for variable length packets, inherently display packet delivery variability. These characteristics most typically include packet loss, packet delay variation, and packets being delivered out of order. Deep Packet Recovery (DPR) techniques provide correction to IP network induced errors and issues. DPR can provide a much broader and stronger protection than traditional Forward Error Correction techniques enabling transport of live video across severely impaired networks.

  13. Silicon-Germanium Fast Packet Switch Developed for Communications Satellites

    NASA Technical Reports Server (NTRS)

    Quintana, Jorge A.

    1999-01-01

    Emerging multimedia applications and future satellite systems will require high-speed switching networks to accommodate high data-rate traffic among thousands of potential users. This will require advanced switching devices to enable communication between satellites. The NASA Lewis Research Center has been working closely with industry to develop a state-of-the-art fast packet switch (FPS) to fulfill this requirement. Recently, the Satellite Industry Task Force identified the need for high-capacity onboard processing switching components as one of the "grand challenges" for the satellite industry in the 21st century. In response to this challenge, future generations of onboard processing satellites will require low power and low mass components to enable transmission of services in the 100 gigabit (1011 bits) per second (Gbps) range.

  14. Steering attosecond electron wave packets with light.

    PubMed

    Kienberger, R; Hentschel, M; Uiberacker, M; Spielmann, Ch; Kitzler, M; Scrinzi, A; Wieland, M; Westerwalbesloh, Th; Kleineberg, U; Heinzmann, U; Drescher, M; Krausz, F

    2002-08-16

    Photoelectrons excited by extreme ultraviolet or x-ray photons in the presence of a strong laser field generally suffer a spread of their energies due to the absorption and emission of laser photons. We demonstrate that if the emitted electron wave packet is temporally confined to a small fraction of the oscillation period of the interacting light wave, its energy spectrum can be up- or downshifted by many times the laser photon energy without substantial broadening. The light wave can accelerate or decelerate the electron's drift velocity, i.e., steer the electron wave packet like a classical particle. This capability strictly relies on a sub-femtosecond duration of the ionizing x-ray pulse and on its timing to the phase of the light wave with a similar accuracy, offering a simple and potentially single-shot diagnostic tool for attosecond pump-probe spectroscopy.

  15. A packet switched communications system for GRO

    NASA Technical Reports Server (NTRS)

    Husain, Shabu; Yang, Wen-Hsing; Vadlamudi, Rani; Valenti, Joseph

    1993-01-01

    This paper describes the packet switched Instrumenters Communication System (ICS) that was developed for the Command Management Facility at GSFC to support the Gamma Ray Observatory (GRO) spacecraft. The GRO ICS serves as a vital science data acquisition link to the GRO scientists to initiate commands for their spacecraft instruments. The system is ready to send and receive messages at any time, 24 hours a day and seven days a week. The system is based on X.25 and the International Standard Organization's (ISO) 7-layer Open Systems Interconnection (OSI) protocol model and has client and server components. The components of the GRO ICS are discussed along with how the Communications Subsystem for Interconnection (CSFI) and Network Control Program Packet Switching Interface (NPSI) software are used in the system.

  16. Particlelike wave packets in complex scattering systems

    NASA Astrophysics Data System (ADS)

    Gérardin, Benoît; Laurent, Jérôme; Ambichl, Philipp; Prada, Claire; Rotter, Stefan; Aubry, Alexandre

    2016-07-01

    A wave packet undergoes a strong spatial and temporal dispersion while propagating through a complex medium. This wave scattering is often seen as a nightmare in wave physics whether it be for focusing, imaging, or communication purposes. Controlling wave propagation through complex systems is thus of fundamental interest in many areas, ranging from optics or acoustics to medical imaging or telecommunications. Here, we study the propagation of elastic waves in a cavity and a disordered waveguide by means of laser interferometry. From the direct experimental access to the time-delay matrix of these systems, we demonstrate the existence of particlelike wave packets that remain focused in time and space throughout their complex trajectory. Due to their limited dispersion, their selective excitation will be crucially relevant for all applications involving selective wave focusing and efficient information transfer through complex media.

  17. Radio Pulsars

    NASA Astrophysics Data System (ADS)

    Beskin, V. S.; Chernov, S. V.; Gwinn, C. R.; Tchekhovskoy, A. A.

    2015-10-01

    Almost 50 years after radio pulsars were discovered in 1967, our understanding of these objects remains incomplete. On the one hand, within a few years it became clear that neutron star rotation gives rise to the extremely stable sequence of radio pulses, that the kinetic energy of rotation provides the reservoir of energy, and that electromagnetic fields are the braking mechanism. On the other hand, no consensus regarding the mechanism of coherent radio emission or the conversion of electromagnetic energy to particle energy yet exists. In this review, we report on three aspects of pulsar structure that have seen recent progress: the self-consistent theory of the magnetosphere of an oblique magnetic rotator; the location, geometry, and optics of radio emission; and evolution of the angle between spin and magnetic axes. These allow us to take the next step in understanding the physical nature of the pulsar activity.

  18. Internet Resources for Radio Astronomy

    NASA Astrophysics Data System (ADS)

    Andernach, H.

    A subjective overview of Internet resources for radio-astronomical information is presented. Basic observing techniques and their implications for the interpretation of publicly available radio data are described, followed by a discussion of existing radio surveys, their level of optical identification, and nomenclature of radio sources. Various collections of source catalogues and databases for integrated radio source parameters are reviewed and compared, as well as the web interfaces to interrogate the current and ongoing large-area surveys. Links to radio observatories with archives of raw (uv-) data are presented, as well as services providing images, both of individual objects or extracts (``cutouts'') from large-scale surveys. While the emphasis is on radio continuum data, a brief list of sites providing spectral line data, and atomic or molecular information is included. The major radio telescopes and surveys under construction or planning are outlined. A summary is given of a search for previously unknown optically bright radio sources, as performed by the students as an exercise, using Internet resources only. Over 200 different links are mentioned and were verified, but despite the attempt to make this report up-to-date, it can only provide a snapshot of the situation as of mid-1998.

  19. Creating and Transporting Trojan Wave Packets

    NASA Astrophysics Data System (ADS)

    Wyker, B.; Ye, S.; Dunning, F. B.; Yoshida, S.; Reinhold, C. O.; Burgdörfer, J.

    2012-01-01

    Nondispersive localized Trojan wave packets with ni˜305 moving in near-circular Bohr-like orbits are created and transported to localized near-circular Trojan states of higher n, nf˜600, by driving with a linearly polarized sinusoidal electric field whose period is slowly increased. The protocol is remarkably efficient with over 80% of the initial atoms being transferred to the higher n states, a result confirmed by classical trajectory Monte Carlo simulations.

  20. Teleportation of nonclassical wave packets of light.

    PubMed

    Lee, Noriyuki; Benichi, Hugo; Takeno, Yuishi; Takeda, Shuntaro; Webb, James; Huntington, Elanor; Furusawa, Akira

    2011-04-15

    We report on the experimental quantum teleportation of strongly nonclassical wave packets of light. To perform this full quantum operation while preserving and retrieving the fragile nonclassicality of the input state, we have developed a broadband, zero-dispersion teleportation apparatus that works in conjunction with time-resolved state preparation equipment. Our approach brings within experimental reach a whole new set of hybrid protocols involving discrete- and continuous-variable techniques in quantum information processing for optical sciences.

  1. Issues in Satellite Packet Video Communication.

    DTIC Science & Technology

    1983-07-01

    i.o . .. . . _ _: .. ,: -t - .. . ..:’, • ... . . . ... . . . j.. - . ". 4 ISSUES IN SATELLITE PACKET VIDEO COMMUNICATIO \\ For the transmitter: 1. Get...120B, which is interfaced to a Digital Equipment Corporation PDP ," 11/45 minicomputer host. The effects of varying xy and z can be simulated on the AP...plus an encoder/decoder for forward error correction, supplied by Linkabit Corporation - the earth station transmitter, receiver, and antenna supplied by

  2. Relativistic Electron Wave Packets Carrying Angular Momentum

    NASA Astrophysics Data System (ADS)

    Bialynicki-Birula, Iwo; Bialynicka-Birula, Zofia

    2017-03-01

    There are important differences between the nonrelativistic and relativistic description of electron beams. In the relativistic case the orbital angular momentum quantum number cannot be used to specify the wave functions and the structure of vortex lines in these two descriptions is completely different. We introduce analytic solutions of the Dirac equation in the form of exponential wave packets and we argue that they properly describe relativistic electron beams carrying angular momentum.

  3. Radio Astronomy

    NASA Technical Reports Server (NTRS)

    Wolken, P. R.; Shaffer, R. D.

    1983-01-01

    Deep Space Network (DSN) 26- and 64-meter antenna stations were utilized in support of Radio Astronomy Experiment Selection Panel experiments. Within a time span of 10 days, in May 1983 (267.75 hours total), nine RAES experiments were supported. Most of these experiments involved multifacility interferometry using Mark 3 data recording terminals and as many as six non-DSN observatories. Investigations of black holes, quasars, galaxies, and radio sources are discussed.

  4. 47 CFR 80.1075 - Radio records.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Radio records. 80.1075 Section 80.1075 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1075...

  5. 47 CFR 80.1075 - Radio records.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Radio records. 80.1075 Section 80.1075 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1075...

  6. 47 CFR 80.1075 - Radio records.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Radio records. 80.1075 Section 80.1075 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1075...

  7. 47 CFR 80.1075 - Radio records.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Radio records. 80.1075 Section 80.1075 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1075...

  8. 47 CFR 80.1075 - Radio records.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Radio records. 80.1075 Section 80.1075 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Global Maritime Distress and Safety System (GMDSS) General Provisions § 80.1075...

  9. Spectral Modulation by Rotational Wave Packets

    NASA Astrophysics Data System (ADS)

    Baertschy, Mark; Hartinger, Klaus

    2005-05-01

    Periodic rephasing of molecular rotational wave packets can create rapid fluctuations in the optical properties of a molecular gas which can be used to manipulate the temporal phase and spectral content of ultrashort light pulses. We have demonstrated spectral control of a time-delayed ultrafast probe pulse propagating through the rotational wave packet prepared by a pump laser pulse. The spectrum of the probe pulse can be either broadened or compressed, depending on the relative sign of the temporal phase modulation and the initial chirp of the probe pulse. Adjustment of the spectral phase at the output of the interaction region allows controlled temporal pulse streching^1 and compression^2. The degree to which the spectrum of an ultrafast pulse can be modified depends on the strength and shape of the rotational wavepacket. We are studying the optimization of the rotational wave packet excitation with complex, shaped pump laser pulses for the purpose of optimizing probe pulse spectra modulation. ^1 Klaus Hartinger and Randy A. Bartels, Opt. Lett., submitted (2005). ^2 R.A. Bartels, T.C. Weinacht, N. Wagner, M. Baertschy, Chris H. Greene, M.M. Murnane, and H.C. Kapteyn , Phys. Rev. Lett., 88, 013903 (2002). This work was supported by the NSF.

  10. DCFRN: a radio network for small farmers.

    PubMed

    Amt, W

    1986-01-01

    The Developing Countries Farm Radio Network (DCFRN), a media group founded in 1979, is committed to assisting small farmers to increase their food supplies by using established radio stations along with other local communication channels to spread agricultural information. The success of this effort is evident in the fact that over 500 broadcasters or organizations in over 100 countries disseminate DCFRN information to an estimated 100,000,000 listeners in about 100 languages. 9 packets have been produced and distributed thus far. Information is gathered on appropriate and inexpensive technologies grassroots level farmers use in developing countries to increase food production, decrease post harvest losses and to make more efficient use of food. The source of this information is on-site interviews with small farmers, farm broadcasters, extension workers, health workers, scientists, and university and government officials; printed materials; and feedback from questionnaires that are included in each information packet. Information on agricultural or nutritional innovations must be developed, tested, and proven in the developing world and must be adaptable in other developing countries in order to be put on tape and then be disseminated by DCFRN. The radio scripts are prepared in a culturally and religiously neutral style. The scripts cover a wide variety of agricultural or health and nutrition issues. Each packet contains "The Blue Sheet," DCFRN's newsletter for participants in the Network. It provides current information about the Network and also covers other development issues not included in the radio scripts. DCFRN information also has been used in newspaper articles, posters, classroom teaching, video tapes, television shows, loudspeaker broadcasts, and puppet shows.

  11. An On-Demand Emergency Packet Transmission Scheme for Wireless Body Area Networks

    PubMed Central

    Al Ameen, Moshaddique; Hong, Choong Seon

    2015-01-01

    The rapid developments of sensor devices that can actively monitor human activities have given rise to a new field called wireless body area network (BAN). A BAN can manage devices in, on and around the human body. Major requirements of such a network are energy efficiency, long lifetime, low delay, security, etc. Traffic in a BAN can be scheduled (normal) or event-driven (emergency). Traditional media access control (MAC) protocols use duty cycling to improve performance. A sleep-wake up cycle is employed to save energy. However, this mechanism lacks features to handle emergency traffic in a prompt and immediate manner. To deliver an emergency packet, a node has to wait until the receiver is awake. It also suffers from overheads, such as idle listening, overhearing and control packet handshakes. An external radio-triggered wake up mechanism is proposed to handle prompt communication. It can reduce the overheads and improve the performance through an on-demand scheme. In this work, we present a simple-to-implement on-demand packet transmission scheme by taking into considerations the requirements of a BAN. The major concern is handling the event-based emergency traffic. The performance analysis of the proposed scheme is presented. The results showed significant improvements in the overall performance of a BAN compared to state-of-the-art protocols in terms of energy consumption, delay and lifetime. PMID:26690161

  12. 40-Gbps optical backbone network deep packet inspection based on FPGA

    NASA Astrophysics Data System (ADS)

    Zuo, Yuan; Huang, Zhiping; Su, Shaojing

    2014-11-01

    In the era of information, the big data, which contains huge information, brings about some problems, such as high speed transmission, storage and real-time analysis and process. As the important media for data transmission, the Internet is the significant part for big data processing research. With the large-scale usage of the Internet, the data streaming of network is increasing rapidly. The speed level in the main fiber optic communication of the present has reached 40Gbps, even 100Gbps, therefore data on the optical backbone network shows some features of massive data. Generally, data services are provided via IP packets on the optical backbone network, which is constituted with SDH (Synchronous Digital Hierarchy). Hence this method that IP packets are directly mapped into SDH payload is named POS (Packet over SDH) technology. Aiming at the problems of real time process of high speed massive data, this paper designs a process system platform based on ATCA for 40Gbps POS signal data stream recognition and packet content capture, which employs the FPGA as the CPU. This platform offers pre-processing of clustering algorithms, service traffic identification and data mining for the following big data storage and analysis with high efficiency. Also, the operational procedure is proposed in this paper. Four channels of 10Gbps POS signal decomposed by the analysis module, which chooses FPGA as the kernel, are inputted to the flow classification module and the pattern matching component based on TCAM. Based on the properties of the length of payload and net flows, buffer management is added to the platform to keep the key flow information. According to data stream analysis, DPI (deep packet inspection) and flow balance distribute, the signal is transmitted to the backend machine through the giga Ethernet ports on back board. Practice shows that the proposed platform is superior to the traditional applications based on ASIC and NP.

  13. Radio Nutricion: A Program for Nutrition Education with the Hispanic Community. Service Provider's Guide = Radio Nutricion: Un Programa de Educacion para la Nutricion para la Comunidad Hispana. Guia del Proveeidor de Servicios.

    ERIC Educational Resources Information Center

    Association of Farmworker Opportunity Program, Arlington, VA.

    The set of materials was designed to provide nutrition instruction to Spanish-speaking farm workers using radio broadcasts. It includes audiocassette tapes of four novellas (mini-dramas) on nutrition-related topics (diabetes, heart disease and high blood pressure, pregnancy, smart shopping), talk shows on the same topics, a public service…

  14. A Medley of Radio Winners.

    ERIC Educational Resources Information Center

    Raley, Nancy

    1984-01-01

    The potential for college use and development of radio stations is explored, and innovative and effective ideas from colleges' current efforts are presented. Topics covered include news services, phone-in features, student staff, college program highlights, foreign language programs, paid advertising, and public service announcements. (MSE)

  15. Feasibility study on radio communications using high altitude radio platform in the stratosphere - Applicability to mobile radio and coverage performance

    NASA Astrophysics Data System (ADS)

    Saruwatari, Taiji

    1991-11-01

    It is possible that a platform, powered by microwaves beamed from the earth, carrying radio equipment and flying in the stratosphere, could be used for radio relay such as satellite communications, terrestrial microwave radio relay, land mobile base stations. In the Communication Research Laboratory, feasibility studies were started in 1989 on application of the high altitude radio platform (HARP) to telecommunications and remote sensing. In this paper, features of mobile radio using the HARP, service coverage of the HARP and cellular configurations are described.

  16. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  17. 47 CFR 80.1151 - Voluntary radio operations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Voluntary radio operations. 80.1151 Section 80.1151 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1151 Voluntary...

  18. 47 CFR 80.157 - Radio officer defined.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Radio officer defined. 80.157 Section 80.157 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements Ship Station Operator Requirements § 80.157 Radio officer...

  19. 47 CFR 80.157 - Radio officer defined.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Radio officer defined. 80.157 Section 80.157 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements Ship Station Operator Requirements § 80.157 Radio officer...

  20. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  1. 47 CFR 90.179 - Shared use of radio stations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Shared use of radio stations. 90.179 Section 90.179 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.179 Shared use...

  2. 47 CFR 90.179 - Shared use of radio stations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Shared use of radio stations. 90.179 Section 90.179 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.179 Shared use...

  3. 47 CFR 80.157 - Radio officer defined.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Radio officer defined. 80.157 Section 80.157 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements Ship Station Operator Requirements § 80.157 Radio officer...

  4. 47 CFR 80.1151 - Voluntary radio operations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Voluntary radio operations. 80.1151 Section 80.1151 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1151 Voluntary...

  5. 47 CFR 90.179 - Shared use of radio stations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Shared use of radio stations. 90.179 Section 90.179 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.179 Shared use...

  6. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  7. 47 CFR 80.1151 - Voluntary radio operations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Voluntary radio operations. 80.1151 Section 80.1151 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1151 Voluntary...

  8. 47 CFR 80.1151 - Voluntary radio operations.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Voluntary radio operations. 80.1151 Section 80.1151 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1151 Voluntary...

  9. 47 CFR 90.179 - Shared use of radio stations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Shared use of radio stations. 90.179 Section 90.179 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.179 Shared use...

  10. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  11. 47 CFR 80.157 - Radio officer defined.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Radio officer defined. 80.157 Section 80.157 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements Ship Station Operator Requirements § 80.157 Radio officer...

  12. 47 CFR 80.1151 - Voluntary radio operations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Voluntary radio operations. 80.1151 Section 80.1151 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1151 Voluntary...

  13. 47 CFR 90.179 - Shared use of radio stations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Shared use of radio stations. 90.179 Section 90.179 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.179 Shared use...

  14. 47 CFR 80.157 - Radio officer defined.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Radio officer defined. 80.157 Section 80.157 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements Ship Station Operator Requirements § 80.157 Radio officer...

  15. 47 CFR 80.1153 - Station log and radio watches.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Station log and radio watches. 80.1153 Section 80.1153 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES STATIONS IN THE MARITIME SERVICES Voluntary Radio Installations General § 80.1153 Station log...

  16. Destination directed packet switch architecture for a geostationary communication satellite network

    NASA Technical Reports Server (NTRS)

    Ivancic, W. D.; Shalkhauser, M. J.; Bobinsky, E. A.; Soni, N. J.; Quintana, J. A.; Kim, H.; Wagner, P.; Vanderaar, M.

    1992-01-01

    A major effort at NASA/Lewis is to identify and develop critical digital technologies and components that enable new commercial missions or significantly improve the performance, cost efficiency, and/or reliability of existing and planned space comunications systems. NASA envisions the need for low data rate, direct to the user communications services, for data, facsimile, voice, and video conferencing. A report that focuses on destination directed packet switching architectures for geostationary communication satellites is presented.

  17. Destination directed packet switch architecture for a geostationary communication satellite network

    NASA Astrophysics Data System (ADS)

    Ivancic, W. D.; Shalkhauser, M. J.; Bobinsky, E. A.; Soni, N. J.; Quintana, J. A.; Kim, H.; Wagner, P.; Vanderaar, M.

    1992-08-01

    A major effort at NASA/Lewis is to identify and develop critical digital technologies and components that enable new commercial missions or significantly improve the performance, cost efficiency, and/or reliability of existing and planned space comunications systems. NASA envisions the need for low data rate, direct to the user communications services, for data, facsimile, voice, and video conferencing. A report that focuses on destination directed packet switching architectures for geostationary communication satellites is presented.

  18. Full Duplex, Spread Spectrum Radio System

    NASA Technical Reports Server (NTRS)

    Harvey, Bruce A.

    2000-01-01

    The goal of this project was to support the development of a full duplex, spread spectrum voice communications system. The assembly and testing of a prototype system consisting of a Harris PRISM spread spectrum radio, a TMS320C54x signal processing development board and a Zilog Z80180 microprocessor was underway at the start of this project. The efforts under this project were the development of multiple access schemes, analysis of full duplex voice feedback delays, and the development and analysis of forward error correction (FEC) algorithms. The multiple access analysis involved the selection between code division multiple access (CDMA), frequency division multiple access (FDMA) and time division multiple access (TDMA). Full duplex voice feedback analysis involved the analysis of packet size and delays associated with full loop voice feedback for confirmation of radio system performance. FEC analysis included studies of the performance under the expected burst error scenario with the relatively short packet lengths, and analysis of implementation in the TMS320C54x digital signal processor. When the capabilities and the limitations of the components used were considered, the multiple access scheme chosen was a combination TDMA/FDMA scheme that will provide up to eight users on each of three separate frequencies. Packets to and from each user will consist of 16 samples at a rate of 8,000 samples per second for a total of 2 ms of voice information. The resulting voice feedback delay will therefore be 4 - 6 ms. The most practical FEC algorithm for implementation was a convolutional code with a Viterbi decoder. Interleaving of the bits of each packet will be required to offset the effects of burst errors.

  19. Radio astronomy

    NASA Technical Reports Server (NTRS)

    Kellermann, Kenneth I.; Heeschen, David; Backer, Donald C.; Cohen, Marshall H.; Davis, Michael; Depater, Imke; Deyoung, David; Dulk, George A.; Fisher, J. R.; Goss, W. Miller

    1991-01-01

    The following subject areas are covered: (1) scientific opportunities (millimeter and sub-millimeter wavelength astronomy; meter to hectometer astronomy; the Sun, stars, pulsars, interstellar masers, and extrasolar planets; the planets, asteroids, and comets; radio galaxies, quasars, and cosmology; and challenges for radio astronomy in the 1990's); (2) recommendations for new facilities (the millimeter arrays, medium scale instruments, and small-scale projects); (3) continuing activities and maintenance, upgrading of telescopes and instrumentation; (4) long range programs and technology development; and (5) social, political, and organizational considerations.

  20. Development of optical packet and circuit integrated ring network testbed.

    PubMed

    Furukawa, Hideaki; Harai, Hiroaki; Miyazawa, Takaya; Shinada, Satoshi; Kawasaki, Wataru; Wada, Naoya

    2011-12-12

    We developed novel integrated optical packet and circuit switch-node equipment. Compared with our previous equipment, a polarization-independent 4 × 4 semiconductor optical amplifier switch subsystem, gain-controlled optical amplifiers, and one 100 Gbps optical packet transponder and seven 10 Gbps optical path transponders with 10 Gigabit Ethernet (10GbE) client-interfaces were newly installed in the present system. The switch and amplifiers can provide more stable operation without equipment adjustments for the frequent polarization-rotations and dynamic packet-rate changes of optical packets. We constructed an optical packet and circuit integrated ring network testbed consisting of two switch nodes for accelerating network development, and we demonstrated 66 km fiber transmission and switching operation of multiplexed 14-wavelength 10 Gbps optical paths and 100 Gbps optical packets encapsulating 10GbE frames. Error-free (frame error rate < 1×10(-4)) operation was achieved with optical packets of various packet lengths and packet rates, and stable operation of the network testbed was confirmed. In addition, 4K uncompressed video streaming over OPS links was successfully demonstrated.

  1. Packet Forwarding Scheme Based on Interworking Architecture for Future Internet

    NASA Astrophysics Data System (ADS)

    Kim, Seokhoon; Ryoo, Intae

    This paper introduces a packet forwarding scheme based on interworking architecture that can provide quite a good QoS by minimizing processing delay which is the major part of the timeliness factor in New Generation IP-based networks. Based on path and resource reservation mechanism, the POSIA makes routers on the packet forwarding path synchronize with each other and then forward packets. We have shown that the POSIA outperforms the existing packet forwarding schemes like IntServ, DiffServ and MPLS through computer simulations using OPNET.

  2. Square-integrability of multivariate metaplectic wave-packet representations

    NASA Astrophysics Data System (ADS)

    Ghaani Farashahi, Arash

    2017-03-01

    This paper presents a systematic study for harmonic analysis of metaplectic wave-packet representations on the Hilbert function space {{L}2}≤ft({{{R}}d}\\right) . The abstract notions of symplectic wave-packet groups and metaplectic wave-packet representations will be introduced. We then present an admissibility condition on closed subgroups of the real symplectic group \\text{Sp}≤ft({{{R}}d}\\right) , which guarantees the square-integrability of the associated metaplectic wave-packet representation on {{L}2}≤ft({{{R}}d}\\right) .

  3. Ship-Shore Packet Switched Communications System.

    DTIC Science & Technology

    1986-06-01

    AD-RU74 638 SHIP-SHORE PACKET SWITCHED COMMUNICATIONdS SYSTE(U) 1 JUN 86NAVAL POSTGRADUATE SCHOOL MONTEREY CA R A BUDDENLERI UNLSSIFIED F/G 71...FORM 1473,84 MAR 83 APR edition may be used until exhausted SECURITY CLASSIFICATION OF THIS PAGE All other editions are obsolete l iI nl I r .. I I I...UNCLASSIFIED SECUMITV CLASSIICATIOs Or TMI# PAS g% "a s r 19. Abstract (cont’d) 3) HF communications are characterized by low capacity and high

  4. Controlling plasmonic wave packets in silver nanowires.

    SciTech Connect

    Cao, L.; Nome, R.; Montgomery, J. M.; Gray, S. K.; Scherer, N. F.

    2010-09-01

    Three-dimensional finite-difference time-domain simulations were performed to explore the excitation of surface plasmon resonances in long silver (Ag) nanowires. In particular, we show that it is possible to generate plasmonic wave packets that can propagate along the nanowire by exciting superpositions of surface plasmon resonances. By using an appropriately chirped pulse, it is possible to transiently achieve localization of the excitation at the distal end of the nanowire. Such designed coherent superpositions will allow realizing spatiotemporal control of plasmonic excitations for enhancing nonlinear responses in plasmonic 'circuits'.

  5. Audio-Visual/Communications Teaching Aids Packet. Supplementary Materials. Packet P-8.

    ERIC Educational Resources Information Center

    Peace Corps, Washington, DC. Information Collection and Exchange Div.

    This packet contains three handouts on training theory and the use of audiovisual aids, as well as a section on materials and presentation techniques for use by community development workers concerned with exchanging information and working with the people in a community. The first handout, "Communication in Development," briefly…

  6. 47 CFR 73.646 - Telecommunications Service on the Vertical Blanking Interval and in the Visual Signal.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Television Broadcast Stations § 73... applicable to the particular service. (d) Television licensees are authorized to lease their VBI and...

  7. 47 CFR 73.646 - Telecommunications Service on the Vertical Blanking Interval and in the Visual Signal.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES Television Broadcast Stations § 73... applicable to the particular service. (d) Television licensees are authorized to lease their VBI and...

  8. 47 CFR 95.424 - (CB Rule 24) How do I have my CB station transmitter serviced?

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service Other Things You Need to Know § 95.424 (CB Rule 24) How do I have my CB station transmitter serviced? (a) You...

  9. 47 CFR 95.424 - (CB Rule 24) How do I have my CB station transmitter serviced?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...) SAFETY AND SPECIAL RADIO SERVICES PERSONAL RADIO SERVICES Citizens Band (CB) Radio Service Other Things You Need to Know § 95.424 (CB Rule 24) How do I have my CB station transmitter serviced? (a) You...

  10. Scattering of wave packets with phases

    NASA Astrophysics Data System (ADS)

    Karlovets, Dmitry V.

    2017-03-01

    A general problem of 2 → N f scattering is addressed with all the states being wave packets with arbitrary phases. Depending on these phases, one deals with coherent states in (3 + 1) D, vortex particles with orbital angular momentum, the Airy beams, and their generalizations. A method is developed in which a number of events represents a functional of the Wigner functions of such states. Using width of a packet σ p /< p> as a small parameter, the Wigner functions, the number of events, and a cross section are represented as power series in this parameter, the first non-vanishing corrections to their plane-wave expressions are derived, and generalizations for beams are made. Although in this regime the Wigner functions turn out to be everywhere positive, the cross section develops new specifically quantum features, inaccessible in the plane-wave approximation. Among them is dependence on an impact parameter between the beams, on phases of the incoming states, and on a phase of the scattering amplitude. A model-independent analysis of these effects is made. Two ways of measuring how a Coulomb phase and a hadronic one change with a transferred momentum t are discussed.

  11. Classical Hamiltonian structures in wave packet dynamics

    NASA Astrophysics Data System (ADS)

    Gray, Stephen K.; Verosky, John M.

    1994-04-01

    The general, N state matrix representation of the time-dependent Schrödinger equation is equivalent to an N degree of freedom classical Hamiltonian system. We describe how classical mechanical methods and ideas can be applied towards understanding and modeling exact quantum dynamics. Two applications are presented. First, we illustrate how qualitative insights may be gained by treating the two state problem with a time-dependent coupling. In the case of periodic coupling, Poincaré surfaces of section are used to view the quantum dynamics, and features such as the Floquet modes take on interesting interpretations. The second application illustrates computational implications by showing how Liouville's theorem, or more generally the symplectic nature of classical Hamiltonian dynamics, provides a new perspective for carrying out numerical wave packet propagation. We show how certain simple and explicit symplectic integrators can be used to numerically propagate wave packets. The approach is illustrated with an application to the problem of a diatomic molecule interacting with a laser, although it and related approaches may be useful for describing a variety of problems.

  12. Wavelet Packet Entropy for Heart Murmurs Classification

    PubMed Central

    Safara, Fatemeh; Doraisamy, Shyamala; Azman, Azreen; Jantan, Azrul; Ranga, Sri

    2012-01-01

    Heart murmurs are the first signs of cardiac valve disorders. Several studies have been conducted in recent years to automatically differentiate normal heart sounds, from heart sounds with murmurs using various types of audio features. Entropy was successfully used as a feature to distinguish different heart sounds. In this paper, new entropy was introduced to analyze heart sounds and the feasibility of using this entropy in classification of five types of heart sounds and murmurs was shown. The entropy was previously introduced to analyze mammograms. Four common murmurs were considered including aortic regurgitation, mitral regurgitation, aortic stenosis, and mitral stenosis. Wavelet packet transform was employed for heart sound analysis, and the entropy was calculated for deriving feature vectors. Five types of classification were performed to evaluate the discriminatory power of the generated features. The best results were achieved by BayesNet with 96.94% accuracy. The promising results substantiate the effectiveness of the proposed wavelet packet entropy for heart sounds classification. PMID:23227043

  13. Radio for Education and Development: Case Studies, Volume II. World Bank Staff Working Paper No. 266.

    ERIC Educational Resources Information Center

    Spain, Peter L.; And Others

    Use of radio for nonformal education and development communications and the technical and economic considerations related to radio services are covered in this second volume of case studies on use of radio for education and development. Under radio and nonformal education are: an evaluation of radio schools as part of the popular promotion…

  14. Modified weighted fair queuing for packet scheduling in mobile WiMAX networks

    NASA Astrophysics Data System (ADS)

    Satrya, Gandeva B.; Brotoharsono, Tri

    2013-03-01

    The increase of user mobility and the need for data access anytime also increases the interest in broadband wireless access (BWA). The best available quality of experience for mobile data service users are assured for IEEE 802.16e based users. The main problem of assuring a high QOS value is how to allocate available resources among users in order to meet the QOS requirement for criteria such as delay, throughput, packet loss and fairness. There is no specific standard scheduling mechanism stated by IEEE standards, which leaves it for implementer differentiation. There are five QOS service classes defined by IEEE 802.16: Unsolicited Grant Scheme (UGS), Extended Real Time Polling Service (ertPS), Real Time Polling Service (rtPS), Non Real Time Polling Service (nrtPS) and Best Effort Service (BE). Each class has different QOS parameter requirements for throughput and delay/jitter constraints. This paper proposes Modified Weighted Fair Queuing (MWFQ) scheduling scenario which was based on Weighted Round Robin (WRR) and Weighted Fair Queuing (WFQ). The performance of MWFQ was assessed by using above five QoS criteria. The simulation shows that using the concept of total packet size calculation improves the network's performance.

  15. 47 CFR 90.655 - Special licensing requirements for Specialized Mobile Radio systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Mobile Radio systems. 90.655 Section 90.655 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.655 Special licensing requirements for Specialized Mobile Radio systems. End users...

  16. 47 CFR 90.656 - Responsibilities of base station licensees of Specialized Mobile Radio systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Specialized Mobile Radio systems. 90.656 Section 90.656 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.656 Responsibilities of base station licensees of Specialized Mobile Radio systems. (a)...

  17. 47 CFR 90.655 - Special licensing requirements for Specialized Mobile Radio systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Mobile Radio systems. 90.655 Section 90.655 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.655 Special licensing requirements for Specialized Mobile Radio systems. End users...

  18. 47 CFR 90.655 - Special licensing requirements for Specialized Mobile Radio systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Mobile Radio systems. 90.655 Section 90.655 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.655 Special licensing requirements for Specialized Mobile Radio systems. End users...

  19. 47 CFR 90.655 - Special licensing requirements for Specialized Mobile Radio systems.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Mobile Radio systems. 90.655 Section 90.655 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.655 Special licensing requirements for Specialized Mobile Radio systems. End users...

  20. 47 CFR 90.656 - Responsibilities of base station licensees of Specialized Mobile Radio systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Specialized Mobile Radio systems. 90.656 Section 90.656 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Regulations Governing... Bands § 90.656 Responsibilities of base station licensees of Specialized Mobile Radio systems. (a)...