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Sample records for uhf satcom dama

  1. Integration of IP-Packet Data Transfers Within UHF DAMA

    National Research Council Canada - National Science Library

    Huckell, Gary

    1998-01-01

    ...). The existing military standards for UHF DAMA do not provide for efficient UHF resource utilization among users wanting WWW type data access characterized by dynamically changing data rate needs for each user...

  2. Satcom access in the Evolved Packet Core

    NARCIS (Netherlands)

    Cano Soveri, M.D.; Norp, A.H.J.; Popova, M.P.

    2011-01-01

    Satellite communications (Satcom) networks are increasingly integrating with terrestrial communications networks, namely Next Generation Networks (NGN). In the area of NGN the Evolved Packet Core (EPC) is a new network architecture that can support multiple access technologies. When Satcom is

  3. Satcom access in the evolved packet core

    NARCIS (Netherlands)

    Cano, M.D.; Norp, A.H.J.; Popova, M.P.

    2012-01-01

    Satellite communications (Satcom) networks are increasingly integrating with terrestrial communications networks, namely Next Generation Networks (NGN). In the area of NGN the Evolved Packet Core (EPC) is a new network architecture that can support multiple access technologies. When Satcom is

  4. Nuclear spinner for SATCOM applications

    International Nuclear Information System (INIS)

    Karlin, J.J.; Raab, B.

    1976-01-01

    In order to avoid the power limitations of the solar-powered spinner satellites, operators of commercial communications spacecraft have turned to three-axis-stabilized designs. Nuclear-powered spacecraft can avoid this limitation, while retaining the desirable weight, stability, and cost advantages of the spinner approach. A nuclear spinner satellite launched on a Delta-3914 can provide enough weight and volume capacity for both C- and Ku-band operation, with a total capacity exceeding 40,000 one-way circuits, almost twice the capacity of present-day solar-three-axis designs. It is shown that, based on the criterion of cost-per-satellite-circuit in orbit, a nuclear spinner Satcom is superior to any present day solar-powered satellite in the Delta-launched class. However, in order to retain this superiority in the face of anticipated advances in solar power technology, a nuclear power system of at least 4 watts (e)/lb specific power is required

  5. Highlights of DAMA/LIBRA

    Directory of Open Access Journals (Sweden)

    Bernabei R.

    2016-01-01

    Full Text Available The DAMA project develops and uses new/improved low background scintillation detectors to investigate the Dark Matter (DM particle component(s in the galactic halo and rare processes deep underground at the Gran Sasso National Laboratory (LNGS of the I.N.F.N.. Here some highlights of DAMA/LIBRA (Large sodium Iodide Bulk for Rare processes as a unique apparatus in direct DM investigation for its full sensitive mass, target material, intrinsic radio-purity, methodological approach and all the controls performed on the experimental parameters are outlined. The DAMA/LIBRA–phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles have reached a model-independent evidence at 9.3 σ C.L. for the presence of DM particles in the galactic halo exploiting the DM annual modulation signature with highly radio-pure NaI(Tl target. Some of the perspectives of the presently running DAMA/LIBRA–phase2 are summarised and the powerful tools offered by a model independent strategy of DM investigation are pointed out.

  6. Link Analysis of Shipboard SATCOM Phased-Array Antennas

    National Research Council Canada - National Science Library

    Major, R

    1998-01-01

    ...) project funded by Space and Naval Warfare Systems Command, PMW 133. The objective of the MMBA project is to demonstrate the capability of a multibeam, multiband satellite communications (SATCOM...

  7. Particle Dark Matter and DAMA/LIBRA

    International Nuclear Information System (INIS)

    Bernabei, R.; Nozzoli, F.; Belli, P.; Cappella, F.; D'Angelo, A.; Prosperi, D.; Cerulli, R.; Dai, C. J.; He, H. L.; Ma, X. H.; Sheng, X. D.; Wang, R. G.; Incicchitti, A.; Montecchia, F.; Ye, Z. P.

    2010-01-01

    The DAMA/LIBRA set-up (about 250 kg highly radiopure NaI(Tl) sensitive mass) is running at the Gran Sasso National Laboratory of the I.N.F.N.. The first DAMA/LIBRA results confirm the evidence for the presence of a Dark Matter particle component in the galactic halo, as pointed out by the former DAMA/NaI set-up; cumulatively the data support such evidence at 8.2 σ C.L. and satisfy all the many peculiarities of the Dark Matter annual modulation signature. The main aspects and prospects of this model independent experimental approach will be outlined.

  8. The Amtex DAMA Project: The Brookhaven contribution

    Energy Technology Data Exchange (ETDEWEB)

    Peskin, A.M.

    1995-01-01

    The Amtex Partnership organized in 1993 as a Technology Transfer Collaboration among members of the integrated textile industry, the DOE National Laboratories, a number of universities, and several research/education/technology transfer organizations (RETTs). Under the Amtex umbrella organization, a number of technology areas were defined and individual projects were launched addressing various aspects of improving the health and competitiveness of the American textile industry. The first and, to date, the largest of these has been the computer-based Demand Activated Manufacturing Architecture (DAMA) project. Brookhaven National Laboratory became involved in DAMA beginning in March of 1993 and remained an active participant through January of 1995. It was staffed almost exclusively with personnel of the Computing and Communications Division. This document summarizes the activities and accomplishments of the Brookhaven team in working with the larger collaboration. Detailed information about the Amtex Partnership, the DAMA Project, and specific BNL contributions are documented elsewhere.

  9. SatCom Systems for Health and Medical Care

    Science.gov (United States)

    Diez, Hubert

    2002-01-01

    Convinced since 1997 that the satellite was capable of providing a real added value either autonomously or as a complement to terrestrial infrastructures, CNES (the French Space Agency) began a determined study, validation and demonstration procedure for new satellite services. At a national but also European and worldwide level, several experiments or projects have been set-up. In each of them (tele-consultations, distant education, tele-epidemiology, tele-echography, assistance to people, training and therapeutic assistance, disaster telemedicine, etc...) well suited satcoms are used. (telecommunications for broadcasting, multicasting, downloading,...- localization, positioning, - low medium and high data rate bidirectional systems,). Medical reference people are associated in each pilot projects first to define the needs but also to manage the medical validation aspects. Our aim is always to test, validate and adapt these new services to bring them into line with the users' expectations. The value added of these technologies in sustainable healthcare services are systematically demonstrated in real situations, with real users, both in terms of quality of service and of economic validity. For several projects CNES has developed typical hardware, or technical on as technical platform. The main projects and their relevant satcom systems will be presented and discussed : - Tele-consultation, - Distance learning and training, - Assistance to people, - Tele-epidemiology, - Disaster telemedicine.

  10. Dama annual modulation from electron recoils

    OpenAIRE

    Foot, R.

    2018-01-01

    Plasma dark matter, which arises in dissipative dark matter models, can give rise to large annual modulation signals from keV electron recoils. Previous work has argued that the DAMA annual modulation signal might be explained in such a scenario. Detailed predictions are difficult due to the inherent complexities involved in modelling the halo plasma interactions with Earth bound dark matter. Here, we consider a simplified phenomenological model for the dark matter density and temperature nea...

  11. UHF RFID technologies for identification and traceability

    CERN Document Server

    Laheurte, Jean-Marc; Paret, Dominique; Loussert, Christophe

    2014-01-01

    UHF Radio Frequency Identification (RFID) is an electronic tagging technology that allows an object, place or person to be automatically identified at a distance without a direct line-of-sight using a radio wave exchange. Applications include inventory tracking, prescription medication tracking and authentication, secure automobile keys, and access control for secure facilities. This book begins with an overview of UHF RFID challenges describing the applications, markets, trades and basic technologies. It follows this by highlighting the main features distinguishing UHF (860MHz-960MHz) and HF

  12. Flight distance in roe deer Capreolus capreolus and fallow deer Dama dama as related to hunting and other factors

    NARCIS (Netherlands)

    Boer, de H.Y.; Breukelen, van L.; Hootsmans, M.J.M.; Wieren, van S.E.

    2004-01-01

    Flight distances in roe deer Capreolus capreolus and fallow deer Dama dama with respect to a human observer on foot were measured in four nature reserves in the Netherlands: two dune reserves in the western part (the Amsterdam Water Supply Dunes (AWD) and Kennemerduinen (KD)) and two forested areas

  13. Boxelder tree (Acer negundo) intoxication in fallow deer (Dama dama) and Dutch Landrace goats (Capra aegagrus hircus)

    NARCIS (Netherlands)

    Bos, Jan Herman; Kik, Marja J.L.; van der Kolk, Johannes H.; IJzer, Jooske

    2017-01-01

    Within 10 days of ingesting boxelder tree (Acer negundo) cuttings, seven fallow deer (Dama dama) died (n=2) or were euthanased (n=5) after showing signs of colic, anorexia and severe depression. Another fallow deer and two Dutch Landrace goats (Capra aegagrus hircus) simultaneously displayed colic

  14. A CoGeNT confirmation of the DAMA signal

    International Nuclear Information System (INIS)

    Foot, R.

    2010-01-01

    The CoGeNT Collaboration has recently reported a rising low energy spectrum in their ultra low noise Germanium detector. This is particularly interesting as the energy range probed by CoGeNT overlaps with the energy region in which DAMA has observed their annual modulation signal. We show that the mirror dark matter candidate can simultaneously explain both the DAMA annual modulation signal and the rising low energy spectrum observed by CoGeNT. This constitutes a model dependent confirmation of the DAMA signal and adds weight to the mirror dark matter paradigm.

  15. Particle dark matter signal in DAMA/LIBRA

    International Nuclear Information System (INIS)

    Bernabei, R.; Belli, P.; Di Marco, A.; Montecchia, F.; Cappella, F.; D'Angelo, A.; Incicchitti, A.; Prosperi, D.; Cerulli, R.; Dai, C.J.; He, H.L.; Ma, X.H.; Sheng, X.D.; Wang, R.G.; Ye, Z.P.

    2012-01-01

    The DAMA/LIBRA experiment, running at LNGS, has a sensitive mass of about 250 kg highly radiopure NaI(Tl) and it is mainly devoted to the investigation of Dark Matter (DM) particles in the Galactic halo by exploiting the model independent DM annual modulation signature. The present DAMA/LIBRA experiment and the former DAMA/NaI one have released so far results corresponding to a total exposure of 1.17 ton×yr over 13 annual cycles. They provide a model independent evidence of the presence of DM particles in the galactic halo at 8.9σ C.L.

  16. Searching for the dark universe by the DAMA experiment

    International Nuclear Information System (INIS)

    Bernabei, R.; Amato, M.; Belli, P.; Cappella, F.; Cerulli, R.; Dai, C.J.; Ignesti, G.; Incicchitti, A.; Kuang, H.H.; Ma, J.M.; Montecchia, F.; Nozzoli, F.; Ye, Z.P.; Prosperi, D.

    2003-01-01

    DAMA is searching for rare processes by developing and using several kinds of radiopure scintillators. In particular, here the results released so far on the WIMP annual modulation signature are discussed and next perspectives are shortly addressed

  17. Leveraging an SNMP Agent in Terminal Equipment for Network Monitoring of U.S. Navy SATCOM

    Science.gov (United States)

    2011-09-01

    Network Topology TWT Traveling-wave Tube TX Transmitter UCD Uplink Channel Descriptor UDP User Datagram Protocol UFO UHF Follow-On UHF Ultra High...through DSCS III, UFO , and Milstar” (Martin, n.d.a).  “Capabilities have grown dramatically with the development of satellite and electronics...Communication Systems (DSCS) II and III and the Global Broadcast Service (GBS) payload on the UHF Follow-On ( UFO ) satellite  In 1971, the DSCS II

  18. 47 CFR 74.733 - UHF translator signal boosters.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false UHF translator signal boosters. 74.733 Section... Translator, and TV Booster Stations § 74.733 UHF translator signal boosters. (a) The licensee of a UHF television broadcast translator station may be authorized to operate one or more signal boosters for the...

  19. RTD application in low power UHF rectifiers

    International Nuclear Information System (INIS)

    Sinyakin, V Yu; Makeev, M O; Meshkov, S A

    2016-01-01

    In the current work, the problem of UHF RFID passive tag sensitivity increase is considered. Tag sensitivity depends on HF signal rectifier efficiency and antenna-rectifier impedance matching. Possibility of RFID passive tag sensitivity increase up to 10 times by means of RTD use in HF signal rectifier in comparison with tags based on Schottky barrier diode is shown. (paper)

  20. DAMA/LIBRA results and perspectives of the second stage

    International Nuclear Information System (INIS)

    Bernabei, R.; Belli, P.; Di Marko, A.; Cappella, F.; D'Angelo, A.; Incicchitti, A.; Caracciolo, V.; Cerulli, R.; Dai, C.J.; He, H.L.; Ma, X.H.; Sheng, X.D.; Wang, R.G.; Montecchia, F.; Ye, Z.P.

    2012-01-01

    The DAMA/LIBRA experiment is mainly dedicated to the investigation on DM particles in the Galactic halo by exploiting the model independent Dark Matter (DM) annual modulation signature. The present DAMA/LIBRA and the former DAMA/NaI (exposed masses: about 250 kg and about 100 kg of highly radiopure NaI(Tl), respectively) experiments have released so far a total exposure of 1.17 ton x yr collected over 13 annual cycles; they provide a model independent evidence of the presence of DM particles in the galactic halo at 8.9 σ C.L.. The data of another annual cycle in the same DAMA/LIBRA running conditions are at hand. After the substitution (at fall 2010) of all the photomultipliers (PMTs) with new ones, having higher quantum efficiency, DAMA/LIBRA has entered the phase 2; that substitution has allowed to lower the software energy threshold of the experiment in the present data taking. Future perspectives are mentioned

  1. DAMA/LIBRA results and perspectives of phase 2

    Energy Technology Data Exchange (ETDEWEB)

    Bernabei, R. [Dip. di Fisica, Univ. “Tor Vergata”, I-00133 Rome (Italy); INFN, sez. Roma “Tor Vergata”, I-00133 Rome (Italy); Belli, P., E-mail: pierluigi.belli@roma2.infn.it [Dip. di Fisica, Univ. “Tor Vergata”, I-00133 Rome (Italy); INFN, sez. Roma “Tor Vergata”, I-00133 Rome (Italy); Cappella, F. [Dip. di Fisica, Univ. di Roma “La Sapienza”, I-00185 Rome (Italy); INFN, sez. Roma, I-00185 Rome (Italy); Caracciolo, V.; Cerulli, R. [Laboratori Nazionali del Gran Sasso, I.N.F.N., Assergi (Italy); Dai, C.J. [IHEP, Chinese Academy, P.O. Box 918/3, Beijing 100039 (China); D' Angelo, A. [Dip. di Fisica, Univ. di Roma “La Sapienza”, I-00185 Rome (Italy); INFN, sez. Roma, I-00185 Rome (Italy); D' Angelo, S.; Di Marco, A. [Dip. di Fisica, Univ. “Tor Vergata”, I-00133 Rome (Italy); INFN, sez. Roma “Tor Vergata”, I-00133 Rome (Italy); He, H.L. [IHEP, Chinese Academy, P.O. Box 918/3, Beijing 100039 (China); Incicchitti, A. [Dip. di Fisica, Univ. di Roma “La Sapienza”, I-00185 Rome (Italy); INFN, sez. Roma, I-00185 Rome (Italy); Ma, X.H. [IHEP, Chinese Academy, P.O. Box 918/3, Beijing 100039 (China); Montecchia, F. [Dip. di Fisica, Univ. “Tor Vergata”, I-00133 Rome (Italy); INFN, sez. Roma “Tor Vergata”, I-00133 Rome (Italy); Dip. di Ingegneria Civile e Ingegneria Informatica, Univ. “Tor Vergata”, I-00133 Rome (Italy); and others

    2014-04-01

    The DAMA/LIBRA experiment, running at the Gran Sasso National Laboratory of the INFN, has a sensitive mass of about 250 kg highly radiopure NaI(Tl). It is mainly devoted to the investigation of Dark Matter (DM) particles in the Galactic halo by exploiting the model independent DM annual modulation signature. The present DAMA/LIBRA experiment and the former DAMA/NaI one (the first generation experiment having an exposed mass of about 100 kg) have released so far results corresponding to a total exposure of 1.17 ton×year over 13 annual cycles. They provide a model independent evidence of the presence of DM particles in the galactic halo at 8.9σ C.L. After the upgrade at fall 2010 when all the PMTs have been replaced with new ones having higher quantum efficiency, the feasibility to decrease the software energy threshold has been demonstrated and the set-up is running in this new configuration, named DAMA/LIBRA–phase2. The perspectives of DAMA/LIBRA–phase2 will be shortly summarized.

  2. DAMA/LIBRA results and perspectives of phase 2

    International Nuclear Information System (INIS)

    Bernabei, R.; Belli, P.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Dai, C.J.; D'Angelo, A.; D'Angelo, S.; Di Marco, A.; He, H.L.; Incicchitti, A.; Ma, X.H.; Montecchia, F.

    2014-01-01

    The DAMA/LIBRA experiment, running at the Gran Sasso National Laboratory of the INFN, has a sensitive mass of about 250 kg highly radiopure NaI(Tl). It is mainly devoted to the investigation of Dark Matter (DM) particles in the Galactic halo by exploiting the model independent DM annual modulation signature. The present DAMA/LIBRA experiment and the former DAMA/NaI one (the first generation experiment having an exposed mass of about 100 kg) have released so far results corresponding to a total exposure of 1.17 ton×year over 13 annual cycles. They provide a model independent evidence of the presence of DM particles in the galactic halo at 8.9σ C.L. After the upgrade at fall 2010 when all the PMTs have been replaced with new ones having higher quantum efficiency, the feasibility to decrease the software energy threshold has been demonstrated and the set-up is running in this new configuration, named DAMA/LIBRA–phase2. The perspectives of DAMA/LIBRA–phase2 will be shortly summarized

  3. Designing gondola using satcom services and solar cell energy

    Science.gov (United States)

    Cau, M.; Dezen, P.

    Introduction of compact, and lightweight terminals for mobile satellite communication, opens up many opportunities to design new telecommunication systems for balloons. Architecture of this gondola, named Narcisse, is built around a control process unit able to support interface with all Inmarsat services, and Iridium or Thuraya satellite network as well. A first technological gondola was launched from Brazil in February 2001, under a Infra Red Mongolfiere (hot air balloon). This gondola used an Inmarsat terminal C which can support in two ways , store and forward messages at a data rate of 600 bits per second. During the 3 turns around the earth, the system worked well, and demonstrated its ability to handle change over from one geostationary spacecraft to the next, when balloon changes ocean region. Moreover this system provides high telemetry rate (Mbits) or telecommand capability, and greatly increase the performances of the scientific payloads . On the other hand, such types of gondola can be useful to operate long duration flight (days) with large stratospheric balloons, currently limited to range capability of UHF ground station . When line of sight of view is lost, between ground station and gondola, the switch would be made from UHF to the Inmarsat or iridium system to complete the mission. In this case, the TM/TC system has no range or altitude limitation, and the gondola descent trajectory can be followed until the ground improving the localization of landing which will be helpful for recovery operation. So, using a real time duplex mini M Inmarsat terminal, the Narcisse gondola has been operationally involved early 2002 in Archeops project. Launched from Kiruna, Narcisse provided a full duplex 2400bits per second link, all along the flight across Russia. Narcisse has been again involved in march 2003 in Mipas project, using Iridium as a cold redundancy to secure Inmarsat mini M not working at extreme polar regions (latitude more than 80°). During this

  4. Investigating Earth shadowing effect with DAMA/LIBRA-phase1

    Energy Technology Data Exchange (ETDEWEB)

    Bernabei, R.; Belli, P.; D' Angelo, S.; Di Marco, A. [Universita di Roma ' ' Tor Vergata' ' , Dipt. di Fisica, Rome (Italy); INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Montecchia, F. [Universita di Roma ' ' Tor Vergata' ' , Dipt. di Fisica, Rome (Italy); INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Universita di Roma ' ' Tor Vergata' ' , Dipt. di Ingegneria Civile e Ingegneria Informatica, Rome (Italy); D' Angelo, A.; Incicchitti, A. [Universita di Roma ' ' La Sapienza' ' , Dipt. di Fisica, Rome (Italy); INFN, sez. Roma, Rome (Italy); Cappella, F.; Caracciolo, V.; Cerulli, R. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G. [Chinese Academy of Sciences, Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Beijing (China); Ye, Z.P. [Chinese Academy of Sciences, Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Beijing (China); University of Jing Gangshan, Ji' an, Jiangxi (China)

    2015-05-15

    In the present paper the results obtained in the investigation of possible diurnal effects for low-energy single-hit scintillation events of DAMA/LIBRA-phase1 (1.04 ton x year exposure) have been analysed in terms of an effect expected in case of dark matter (DM) candidates inducing nuclear recoils and having high cross-section with ordinary matter, which implies low DM local density in order to fulfill the DAMA/LIBRA DM annual modulation results. This effect is due to the different Earth depths crossed by those DM candidates during the sidereal day. (orig.)

  5. L'exil irakien à Damas

    Directory of Open Access Journals (Sweden)

    Mohamed Kamel Doraï

    2009-03-01

    Full Text Available Depuis la chute du régime de Saddam Hussein, le conflit en Irak perdure et des centaines de milliers d'Irakiens ont été contraints de quitter leur pays pour se diriger en grand nombre vers la Syrie. Pour la plupart venus des principales agglomérations irakiennes, et surtout de Bagdad, ils se sont installés dans les faubourgs de la capitale syrienne. Ni la Syrie, ni le Haut Commissariat aux Réfugiés des Nations Unies n'ont ouverts de camps pour accueillir les réfugiés, qui forment aujourd'hui l'une des plus importantes populations de réfugiés urbains à travers le monde. Cet article analyse les modes d'installation des Irakiens à Damas, et le rôle que joue la ville dans les parcours migratoires des exilés.Since the fall of Saddam Hussein regime, the conflict in Iraq is still ongoing and hundreds of thousands of Iraqis have been constrained to leave their country to move in great number towards Syria. The vast majority comes from the main cities in Iraq, and especially from Baghdad, and they settled in the suburbs of the Syrian capital. Neither Syria, nor the United Nations High Commissioner for Refugees have opened camps to accommodate the refugees, who are today one of the most important group of urban refugees throughout the world. This article analyzes the modes of settlement of the Iraqis in Damascus, and the role played by the city in the migratory dynamics of the Iraqi Diaspora.

  6. Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus) and fallow deer (Dama dama)

    OpenAIRE

    Wiklund, Eva; Manley, Timothy R.; Littlejohn, Roger P.

    2004-01-01

    The ultimate pH value of meat (measured at approx. 24 hours post slaughter) gives information about the technological quality, i.e. shelf life, colour, water-holding properties and tenderness and is a direct consequence of muscle glycogen (energy) levels at slaughter. It may therefore also indicate whether or not the animal has been exposed to stressful energy depleting events prior to slaughter. In the present study, 141 animals (130 red deer (Cervus elaphus) and 11 fallow deer (Dama dama) w...

  7. Examining the time dependence of DAMA's modulation amplitude

    Science.gov (United States)

    Kelso, Chris; Savage, Christopher; Sandick, Pearl; Freese, Katherine; Gondolo, Paolo

    2018-03-01

    If dark matter is composed of weakly interacting particles, Earth's orbital motion may induce a small annual variation in the rate at which these particles interact in a terrestrial detector. The DAMA collaboration has identified at a 9.3σ confidence level such an annual modulation in their event rate over two detector iterations, DAMA/NaI and DAMA/LIBRA, each with ˜ 7 years of observations. This data is well fit by a constant modulation amplitude for the two iterations of the experiment. We statistically examine the time dependence of the modulation amplitudes, which "by eye" appear to be decreasing with time in certain energy ranges. We perform a chi-squared goodness of fit test of the average modulation amplitudes measured by the two detector iterations which rejects the hypothesis of a consistent modulation amplitude at greater than 80, 96, and 99.6% for the 2-4, 2-5 and 2-6 keVee energy ranges, respectively. We also find that among the 14 annual cycles there are three ≳ 3σ departures from the average in our estimated data in the 5-6 keVee energy range. In addition, we examined several phenomenological models for the time dependence of the modulation amplitude. Using a maximum likelihood test, we find that descriptions of the modulation amplitude as decreasing with time are preferred over a constant modulation amplitude at anywhere between 1σ and 3σ , depending on the phenomenological model for the time dependence and the signal energy range considered. A time dependent modulation amplitude is not expected for a dark matter signal, at least for dark matter halo morphologies consistent with the DAMA signal. New data from DAMA/LIBRA-phase2 will certainly aid in determining whether any apparent time dependence is a real effect or a statistical fluctuation.

  8. Pediatrician’s perspectives on discharge against medical advice (DAMA among pediatric patients: a qualitative study

    Directory of Open Access Journals (Sweden)

    Macrohon Bernadette C

    2012-06-01

    Full Text Available Abstract Background The phenomenon of discharge against medical advice (DAMA among pediatric patients places pediatricians in a dilemma between respect for the parent’s decision and the desire to provide complete care for the vulnerable child-patient. Little has been written about factors that affect a pediatrician’s decision to allow a parent to discharge his child against medical advice. This qualitative study aims to answer the question of how pediatric residents in a tertiary government hospital perceive and decide on a DAMA request from a parent or primary caregiver. Methods Using a focus group discussion approach, 11 pediatric residents from a government-run tertiary hospital were recruited for the study. The session was digitally recorded and dominant themes were coded and identified. Results There were three prominent themes that arose in the discussion: variability of definitions of DAMA, factors considered before “allowing” the patient to be DAMA, and the implications of a DAMA request on their performance as pediatricians. Definitions vary from one resident to another based on the main reason for DAMA (terminal, cultural, or financial. A conflict was noted in the definition of Home per Request (HPR versus DAMA. Factors that influence a pediatrician to sign out a case as DAMA include: their ability to do something about the reason given for the DAMA request, the condition of the patient when the DAMA request was given, their impression of the kind of care that the parents provide, and their legal liabilities. Pediatric residents generally maintain a positive attitude towards the parents who request for DAMA and in the event of readmission, accept the patient into their care again. The occurrence of a variety of definitions and subcategories for DAMA may cause confusion among the pediatricians and should be clarified. The familiarity with cultural traditions contributes to their ability to handle situations that may lead to DAMA

  9. Ionospheric Impacts on UHF Space Surveillance

    Science.gov (United States)

    Jones, J. C.

    2017-12-01

    Earth's atmosphere contains regions of ionized plasma caused by the interaction of highly energetic solar radiation. This region of ionization is called the ionosphere and varies significantly with altitude, latitude, local solar time, season, and solar cycle. Significant ionization begins at about 100 km (E layer) with a peak in the ionization at about 300 km (F2 layer). Above the F2 layer, the atmosphere is mostly ionized but the ion and electron densities are low due to the unavailability of neutral molecules for ionization so the density decreases exponentially with height to well over 1000 km. The gradients of these variations in the ionosphere play a significant role in radio wave propagation. These gradients induce variations in the index of refraction and cause some radio waves to refract. The amount of refraction depends on the magnitude and direction of the electron density gradient and the frequency of the radio wave. The refraction is significant at HF frequencies (3-30 MHz) with decreasing effects toward the UHF (300-3000 MHz) range. UHF is commonly used for tracking of space objects in low Earth orbit (LEO). While ionospheric refraction is small for UHF frequencies, it can cause errors in range, azimuth angle, and elevation angle estimation by ground-based radars tracking space objects. These errors can cause significant errors in precise orbit determinations. For radio waves transiting the ionosphere, it is important to understand and account for these effects. Using a sophisticated radio wave propagation tool suite and an empirical ionospheric model, we calculate the errors induced by the ionosphere in a simulation of a notional space surveillance radar tracking objects in LEO. These errors are analyzed to determine daily, monthly, annual, and solar cycle trends. Corrections to surveillance radar measurements can be adapted from our simulation capability.

  10. 47 CFR 73.4195 - Political advertising by UHF translators.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Political advertising by UHF translators. 73.4195 Section 73.4195 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO... advertising by UHF translators. See Public Notice, FCC 76936, dated October 8, 1976. 62 FCC 2d 896; 41 FR...

  11. Special Semaphore Scheme for UHF Spacecraft Communications

    Science.gov (United States)

    Butman, Stanley; Satorius, Edgar; Ilott, Peter

    2006-01-01

    A semaphore scheme has been devised to satisfy a requirement to enable ultrahigh- frequency (UHF) radio communication between a spacecraft descending from orbit to a landing on Mars and a spacecraft, in orbit about Mars, that relays communications between Earth and the lander spacecraft. There are also two subsidiary requirements: (1) to use UHF transceivers, built and qualified for operation aboard the spacecraft that operate with residual-carrier binary phase-shift-keying (BPSK) modulation at a selectable data rate of 8, 32, 128, or 256 kb/s; and (2) to enable low-rate signaling even when received signals become so weak as to prevent communication at the minimum BPSK rate of 8 kHz. The scheme involves exploitation of Manchester encoding, which is used in conjunction with residual-carrier modulation to aid the carrier-tracking loop. By choosing various sequences of 1s, 0s, or 1s alternating with 0s to be fed to the residual-carrier modulator, one would cause the modulator to generate sidebands at a fundamental frequency of 4 or 8 kHz and harmonics thereof. These sidebands would constitute the desired semaphores. In reception, the semaphores would be detected by a software demodulator.

  12. On the DAMA and CoGeNT Modulations

    DEFF Research Database (Denmark)

    Frandsen, Mads Toudal; Kahlhoefer, Felix; March-Russell, John

    2011-01-01

    DAMA observes an annual modulation in their event rate, as might be expected from dark matter scatterings, while CoGeNT has reported evidence for a similar modulation. The simplest interpretation of these findings in terms of dark matter-nucleus scatterings is excluded by other direct detection...... constraints, while inelasticity enhances the annual modulation fraction of the signal, bringing the CoGeNT and CDMS results into better agreement....

  13. Inelastic dark matter at DAMA, CDMS and Future Experiments

    OpenAIRE

    Smith, David R.; Weiner, Neal

    2002-01-01

    The DAMA annual modulation signature, interpreted as evidence for a spin-independent WIMP coupling, seems in conflict with null results from CDMS. However, in models of ``inelastic dark matter'', the experiments are compatible. Inelastic dark matter can arise in supersymmetric theories as the real component of a sneutrino mixed with a singlet scalar. In contrast with ordinary sneutrino dark matter, such particles can satisfy all experimental constraints while giving the appropriate relic abun...

  14. Final model independent result of DAMA/LIBRA-phase1

    Energy Technology Data Exchange (ETDEWEB)

    Bernabei, R.; D' Angelo, S.; Di Marco, A. [Universita di Roma ' ' Tor Vergata' ' , Dipartimento di Fisica, Rome (Italy); INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Belli, P. [INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Cappella, F.; D' Angelo, A.; Prosperi, D. [Universita di Roma ' ' La Sapienza' ' , Dipartimento di Fisica, Rome (Italy); INFN, sez. Roma, Rome (Italy); Caracciolo, V.; Castellano, S.; Cerulli, R. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G. [Chinese Academy, IHEP, Beijing (China); Incicchitti, A. [INFN, sez. Roma, Rome (Italy); Montecchia, F. [INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Universita di Roma ' ' Tor Vergata' ' , Dipartimento di Ingegneria Civile e Ingegneria Informatica, Rome (Italy); Ye, Z.P. [Chinese Academy, IHEP, Beijing (China); University of Jing Gangshan, Jiangxi (China)

    2013-12-15

    The results obtained with the total exposure of 1.04 ton x yr collected by DAMA/LIBRA-phase1 deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles (i.e. adding a further 0.17 ton x yr exposure) are presented. The DAMA/LIBRA-phase1 data give evidence for the presence of Dark Matter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation signature by using highly radio-pure NaI(Tl) target, at 7.5{sigma} C.L. Including also the first generation DAMA/NaI experiment (cumulative exposure 1.33 ton x yr, corresponding to 14 annual cycles), the C.L. is 9.3{sigma} and the modulation amplitude of the single-hit events in the (2-6) keV energy interval is: (0.0112{+-}0.0012) cpd/kg/keV; the measured phase is (144{+-}7) days and the measured period is (0.998{+-}0.002) yr, values well in agreement with those expected for DM particles. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade. (orig.)

  15. DAMA RESULTS: DARK MATTER IN THE GALACTIC HALO

    Directory of Open Access Journals (Sweden)

    R. Bernabei

    2013-12-01

    Full Text Available Experimental efforts and theoretical developmens support that most of the Universe is Dark and a large fraction of it should be made of relic particles; many possibilities are open on their nature and interaction types. In particular, the DAMA/LIBRA experiment at Gran Sasso Laboratory (sensitive mass: ~250 kg is mainly devoted to the investigation of Dark Matter (DM particles in the Galactic halo by exploiting the model independent DM annual modulation signature with higly radiopure Na I(Tl targets. DAMA/LIBRA is the succesor of the first generation DAMA/NaI (sensitive mass: ~100 kg; cumulatively the two experiments have released so far the results obtained by analyzing an exposure of 1.17 t yr, collected over 13 annual cycles. The data show a model independent evidence of the presence of DM particles in the galactic halo at 8.9σ confidence level (C.L.. Some of the already achieved results are shortly reminded, the last upgrade occurred at fall 2010 is mentioned and future perspectives are sumarized.

  16. Using the SLAC VHF and UHF radio systems

    International Nuclear Information System (INIS)

    Struven, W.

    1987-02-01

    The use of the SLAC VHF and UHF Radio Systems and the Tunnel Antenna Systems as they are presently configured is described. The original radio system was built in 1966 and has grown in scope over the years. The Tunnel Antenna Systems were developed for, and first installed in, the PEP ring, and later added to other tunnels and redesigned to cover the UHF range, as well as VHF. The UHF radio system was designed and built for SLC use, and was first used in the SLC Arcs. The three radio systems will be described and the capabilities of each system will be defined

  17. Environmental/Noise Effects on VHF/UHF UWB SAR

    National Research Council Canada - National Science Library

    Ralston, James

    1998-01-01

    This paper presents a straightforward approach to estimating the impact of natural environmental noise on an overall system noise temperature for very high frequency/ultrahigh frequency synthetic aperture radar (VHF/UHF SAR...

  18. Assessment of Multipath and Shadowing Effects on UHF Band in ...

    African Journals Online (AJOL)

    Sultan

    bands are used for television broadcasting, mobile cellular systems, Wi-Fi, satellite communications and many others. Effective communication link in the UHF band requires direct line of sight ..... ad-hoc 802.11 wireless LAN (WLAN) devices.

  19. Evita en España: máscaras de una Primera Dama

    OpenAIRE

    Diez-Puertas, E. (Emeterio)

    2014-01-01

    El viaje a España de la esposa del Presidente de Argentina es todo un evento mediático y las imágenes que se generan en aquel momento pasan a formar parte fundamental del mito de Evita. En realidad, esas imágenes sufren todo un proceso de borrado, atribución, apropiación y hasta de confrontación. Los medios enfrentan distintas concepciones de lo que debe ser o no debe ser la esposa de un presidente: la dama-pródiga, la dama-artista, la dama-nación, la dama-corazón y hasta la dama-libertad, pu...

  20. Inelastic dark matter in light of DAMA/LIBRA

    International Nuclear Information System (INIS)

    Chang, Spencer; Weiner, Neal; Kribs, Graham D.; Tucker-Smith, David

    2009-01-01

    Inelastic dark matter, in which weakly interacting massive particle (WIMP)-nucleus scatterings occur through a transition to an excited WIMP state ∼100 keV above the ground state, provides a compelling explanation of the DAMA annual modulation signal. We demonstrate that the relative sensitivities of various dark matter direct detection experiments are modified such that the DAMA annual modulation signal can be reconciled with the absence of a reported signal at CDMS-Soudan, XENON10, ZEPLIN, CRESST, and KIMS for inelastic WIMPs with masses O(100 GeV). We review the status of these experiments, and make predictions for upcoming ones. In particular, we note that inelastic dark matter leads to highly suppressed signals at low energy, with most events typically occurring between 20 and 45 keV (unquenched) at xenon and iodine experiments, and generally no events at low (∼10 keV) energies. Suppressing the background in this high-energy region is essential to testing this scenario. The recent CRESST data suggest seven observed tungsten events, which is consistent with expectations from this model. If the tungsten signal persists at future CRESST runs, it would provide compelling evidence for inelastic dark matter, while its absence should exclude it.

  1. The design and simulation of UHF RFID microstrip antenna

    Science.gov (United States)

    Chen, Xiangqun; Huang, Rui; Shen, Liman; Liu, Liping; Xiong, Dezhi; Xiao, Xiangqi; Liu, Mouhai; Renheng, Xu

    2018-02-01

    At present, China has delineated UHF RFID communicating frequency range which is 840 ∼ 845 MHz and 920 ∼ 925 MHz, but most UHF microstrip antenna don’t carry out this standard, that leads to radio frequency pollution. In order to solve the problems above, a method combining theory and simulation is adopted. Combining with a new ceramic material, a 925.5 MHz RFID microstrip antenna is designed, which is optimized and simulated by HFSS software. The results show that the VSWR of this RFID microstrip antenna is relatively small in the vicinity of 922.5 MHz, the gain is 2.1 dBi, which can be widely used in China’s UHF RFID communicating equipments.

  2. DAMA/LIBRA-phase1 results and perspectives of the phase2

    Directory of Open Access Journals (Sweden)

    Bernabei R.

    2015-01-01

    Full Text Available The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA–phase1 deep underground at the Gran Sasso National Laboratory (LNGS of the I.N.F.N. during 7 annual cycles are summarized. The DAMA/LIBRA–phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles give evidence at 9.3 σ C.L. for the presence of Dark Matter (DM particles in the galactic halo, on the basis of the exploited model independent DM annual modulation signature by using highly radio-pure NaI(Tl target. No systematic or side reaction able to mimic the exploited DM signature has been found or suggested by anyone over more than a decade. The same data of DAMA/LIBRA–phase1 have also been analyzed searching for possible DM second-order diurnal effect; at present, the DM diurnal modulation amplitude – expected because of the Earth diurnal motion – evaluated on the basis of the DAMA Dark Matter annual modulation results is below the reached experimental sensitivity. Some of the perspectives of the presently running DAMA/LIBRA–phase2 are outlined.

  3. Fattori influenzanti la distribuzione del Daino (Dama dama in un'area dell'Appennino settentrionale

    Directory of Open Access Journals (Sweden)

    Enrico Merli

    2003-10-01

    Full Text Available Abstract Factors affecting the distribution of fallow deer (Dama dama in an area of the northern Apennines (Italy A wild population of fallow deer (Dama dama, originated in the Seventies from accidental release, has been monitored from 1996 to 2000 in the hilly and mountainous habitat of the Pavia county (Northern Apennines. Sightings and signs of presence on 34 transects (total length of 163.2 km were collected twice a year in spring. The distribution of the species in the study area (732 km² was defined on the basis of a grid of 215 4-km² sample units. The species occupied the 28% and 22% of the study area respectively in 1997 and 2000. The relative abundance of the population, estimated as mean of sightings-signs/km varied from 0.50 (S.E. = 0.27 in 1997 to 0.03 (S.E. = 0.03 in 1998. Discriminant Function and Logistic Regression Analysis were performed to investigate the influence of 23 habitat variables on the distribution of fallow deers in 1997. Both statistical techniques identified the length of the edge between woods and crops as the main variable affecting fallow deer distribution. The analysis also pointed out that the area potentially suitable for the species raised up to 388 km² (53.0% of the study area. Riassunto Una popolazione di Daino presente nella zona collinare e montana della provincia di Pavia (732 km², originatasi da una fuga di animali da un allevamento negli anni 70, è stata monitorata dal 1996 al 2000. Per la definizione della distribuzione è stato predisposto un sistema di 34 transetti (163,2 km in totale percorsi 2 volte l'anno, in primavera, annotando e mappando tutti i segni di presenza e le osservazioni dirette della specie. L'area di studio è quindi stata suddivisa in maglie quadrate di 400 ha ciascuna (Unità di Campionamento, a cui è stata associata, per ogni anno la presenza o l'assenza della specie. La superficie interessata dalla

  4. The effect of gender on meat (Longissimus lumborum muscle quality characteristics in the fallow deer (Dama dama L.

    Directory of Open Access Journals (Sweden)

    Natalia Piaskowska

    2015-07-01

    Full Text Available The aim of this study was to determine the quality of meat (Longissimus lumborum muscle from male (11 bucks and female (10 does fallow deer (Dama dama L. aged 17-18 months, hunter-harvested in north-eastern Poland during one hunting season. Muscle samples collected from the carcasses of male fallow deer were characterized by a higher (P≤0.01 content of dry matter, protein, fat and energy, and a lower (P≤0.01 water/protein ratio than male counterparts. An analysis of the fatty acid profile revealed that the intramuscular fat of male fallow deer contained higher concentrations of C12:0, C20:0, C18:2 and C20:1 fatty acids (P≤0.01, and C16:1, C18:1 and C18:3 fatty acids (P≤0.05, whereas the intramuscular fat of female fallow deer contained higher levels of C16:0 and C17:1 fatty acids (P≤0.01, and C14:0, C17:0 and C20:4 fatty acids (P≤0.05, and higher (P≤0.01 amounts of saturated fatty acids. The fat extracted from the carcasses of bucks had a higher (P≤0.01 ratio of polyunsaturated fatty acids to saturated fatty acids. An analysis of the physicochemical properties of meat indicated that samples of the Longissimus lumborum muscle collected from the carcasses of male fallow deer were characterized by a lower (P≤0.01 pH and greater (P≤0.01 drip loss, and their colour had a higher (P≤0.01 contribution of redness, yellowness, and higher saturation. The effect of gender on meat quality was also confirmed by a sensory analysis, in which meat from bucks received higher scores for juiciness (P≤0.05, and meat from does for tenderness (P≤0.01.

  5. Assessment of multipath and shadowing effects on UHF band in ...

    African Journals Online (AJOL)

    In this work, the multi-path and shadowing effects on signal impairment were investigated through the use of empirical and semi-empirical path loss models analysis in built-up environments. Electromagnetic field strength measurements were conducted using four television transmitters at UHF bands along four major routes ...

  6. Increased operational range for implantable UHF RFID antennas

    NARCIS (Netherlands)

    Dubok, A.; Smolders, A.B.

    2014-01-01

    This paper discusses the main design challenges of implantable UHF RFID antennas in lossy environments. A novel cylindrical implantable antenna concept is presented. The proposed antenna shows good performance inside lossy environments, like a human body. The RFID tag is able to work in a range up

  7. From VHF to UHF CMOS-MEMS Monolithically Integrated Resonators

    DEFF Research Database (Denmark)

    Teva, Jordi; Berini, Abadal Gabriel; Uranga, A.

    2008-01-01

    This paper presents the design, fabrication and characterization of microresonators exhibiting resonance frequencies in the VHF and UHF bands, fabricated using the available layers of the standard and commercial CMOS technology, AMS-0.35mum. The resonators are released in a post-CMOS process cons...

  8. Gastrointestinal Strongyle Egg Output and its Relationship with Tick Burden in Gambian N'dama and Gobra Zebu Cattle

    Directory of Open Access Journals (Sweden)

    Mattioli, RC.

    1995-01-01

    Full Text Available Fortnightly quantitative analysis of rectal faecal samples for the presence of strongyle eggs were carried out from May 1992 to April 1993 on 11 Gambian N'dama Bos taurus and 11 Gobra zebu Bos indicus cattle. Significantly (P <0.001 lower strongyle egg outputs were found in N'dama in comparison with zebu cattle. No correlation was found between individual cumulative tick burden and strongyle egg output in either breed, although individual variations in parasite burdens were lower in N'dama than in zebu cattle. This study strenghtens the evidence for the presence of a natural resistant trait to strongyle infection in N'dama cattle.

  9. Anaplasma phagocytophilum and Babesia spp. in roe deer (Capreolus capreolus), fallow deer (Dama dama) and mouflon (Ovis musimon) in Germany.

    Science.gov (United States)

    Kauffmann, Melanie; Rehbein, Steffen; Hamel, Dietmar; Lutz, Walburga; Heddergott, Mike; Pfister, Kurt; Silaghi, Cornelia

    2017-02-01

    Infections with the tick-borne pathogens Anaplasma phagocytophilum and Babesia spp. can cause febrile disease in several mammalian species, including humans. Wild ruminants in Europe are suggested to serve as reservoir hosts for particular strains or species of these pathogens. The aims of this study were to investigate the occurrence of A. phagocytophilum and Babesia spp. in roe deer (Capreolus capreolus), fallow deer (Dama dama) and mouflon (Ovis musimon orientalis) in Germany, and the diversity and host association of genetic variants of A. phagocytophilum and Babesia species. From 2009 to 2010, 364 spleen samples from 153 roe deer, 43 fallow deer and 168 mouflon from 13 locations in Germany were tested for DNA of A. phagocytophilum and Babesia spp. by real-time PCR or conventional PCR, respectively. Variants of A. phagocytophilum were investigated with a nested PCR targeting the partial 16S rRNA gene, and species of piroplasms were identified by sequencing. DNA of A. phagocytophilum was detected in 303 (83.2%) samples: roe deer, 96.1% (147/153); fallow deer, 72.1% (31/43); and mouflon, 74.4% (125/168). Sequence analysis of 16S rRNA-PCR products revealed the presence of nine different genetic variants. DNA of Babesia spp. was found in 113 (31.0%) samples: roe deer, 62.8% (96/153); fallow deer, 16.3% (6/43); and mouflon, 6.5% (11/168). Babesia capreoli, Babesia sp. EU1 (referred to also as B. venatorum), B. odocoilei-like and a Theileria species were identified. Co-infections with A. phagocytophilum and Babesia spp. were detected in 30.0% of the animals which were tested positive for A. phagocytophilum and/or Babesia spp. Roe deer had a significantly higher percentage of co-infections (60.8%), followed by fallow deer (14.0%) and mouflon (6.5%). Thus, the results suggest that roe deer plays a key role in the endemic cycles of the pathogens investigated. Copyright © 2016 Elsevier Ltd. All rights reserved.

  10. Inelastic dark matter, non-standard halos and the DAMA/LIBRA results

    International Nuclear Information System (INIS)

    March-Russell, John; McCabe, Christopher; McCullough, Matthew

    2009-01-01

    The DAMA collaboration have claimed to detect particle dark matter (DM) via an annual modulation in their observed recoil event rate. This appears to be in strong disagreement with the null results of other experiments if interpreted in terms of elastic DM scattering, while agreement for a small region of parameter space is possible for inelastic DM (iDM) due to the altered kinematics of the collision. To date most analyses assume a simple galactic halo DM velocity distribution, the Standard Halo Model, but direct experimental support for the SHM is severely lacking and theoretical studies indicate possible significant differences. We investigate the dependence of DAMA and the other direct detection experiments on the local DM velocity distribution, utilizing the results of the Via Lactea and Dark Disc numerical simulations. We also investigate effects of varying the solar circular velocity, the DM escape velocity, and the DAMA quenching factor within experimental limits. Our data set includes the latest ZEPLIN-III results, as well as full publicly available data sets. Due to the more sensitive dependence of the inelastic cross section on the velocity distribution, we find that with Via Lactea the DAMA results can be consistent with all other experiments over an enlarged region of iDM parameter space, with higher mass particles being preferred, while Dark Disc does not lead to an improvement. A definitive test of DAMA for iDM requires heavy element detectors.

  11. Music Is Not Our Enemy, but Noise Should Be Regulated: Thoughts on Shooting/Conflicts Related to Dama Square Dance in China

    Science.gov (United States)

    Zhou, Lijun

    2014-01-01

    While Dama square dance is gaining popularity in China, especially with middle-aged and older-adult women--hence the "Dama" (Chinese for "big mamas") moniker--there have been conflicts due to the loud music played for the activity. After a brief explanation of Dama square dance and a description of the context of the conflicts,…

  12. Glycolytic potential and ultimate muscle pH values in red deer (Cervus elaphus and fallow deer (Dama dama

    Directory of Open Access Journals (Sweden)

    Eva Wiklund

    2004-04-01

    Full Text Available The ultimate pH value of meat (measured at approx. 24 hours post slaughter gives information about the technological quality, i.e. shelf life, colour, water-holding properties and tenderness and is a direct consequence of muscle glycogen (energy levels at slaughter. It may therefore also indicate whether or not the animal has been exposed to stressful energy depleting events prior to slaughter. In the present study, 141 animals (130 red deer (Cervus elaphus and 11 fallow deer (Dama dama were included to investigate the relationship between ultimate pH and residual glycogen concentration in red deer and fallow deer M. longissimus. In addition, the muscle glycogen content and ultimate pH values in three red deer muscles (Mm. triceps brachii, longissimus and biceps femoris were studied. M. triceps brachii had higher ultimate pH and lower glycogen content compared with the other two studied muscles. The frequency of intermediate DFD (5.8≤ pH<6.2 was 5.4% in red deer M. longissimus, compared with 9.1% in fallow deer, while the frequency of DFD (pH≥ 6.2 was much lower in red deer (3.8% than in fallow deer (54.5%. A curvilinear relationship between ultimate pH and total glucose concentration (glycogen and glucose 30 min post slaughter in red deer and fallow deer M. longissimus was found. The relationship between muscle pH and lactic acid concentration however, was indicated to be linear. A significant variation in total glucose concentration at ultimate pH below 5.80 was observed, including values in the range from 18 to 123 mmol/kg wet tissue. It was concluded that further studies are needed to further explore the relationship between muscle glycogen content and technological and sensory quality attributes of meat from different deer species.Abstract in Swedish / Sammanfattning:Köttets pH-värde (mätt ca 24 timmar efter slakt har stor betydelse för den teknologiska kvaliteten som t. ex. hållbarhet, färg, vattenhållande förmåga och m

  13. Scintillation efficiency measurement of Na recoils in NaI(Tl) below the DAMA/LIBRA energy threshold

    Energy Technology Data Exchange (ETDEWEB)

    Xu, Jingke; Shields, Emily; Calaprice, Frank; Westerdale, Shawn; Froborg, Francis; Suerfu, Burkhant; Alexander, Thomas; Aprahamian, Ani; Back, Henning O.; Casarella, Clark; Fang, Xiao; Gupta, Yogesh K.; Ianni, Aldo; Lamere, Edward; Lippincott, W. Hugh; Liu, Qian; Lyons, Stephanie; Siegl, Kevin; Smith, Mallory; Tan, Wanpeng; Kolk, Bryant Vande

    2015-07-01

    The dark matter interpretation of the DAMA modulation signal depends on the NaI(Tl) scintillation efficiency of nuclear recoils. Previous measurements for Na recoils have large discrepancies, especially in the DAMA/LIBRA modulation energy region. We report a quenching effect measurement of Na recoils in NaI(Tl) from 3 to 52 keVnr, covering the whole DAMA/LIBRA energy region for dark matter-Na scattering interpretations. By using a low-energy, pulsed neutron beam, a double time-of-flight technique, and pulse-shape discrimination methods, we obtained the most accurate measurement of this kind for NaI(Tl) to date. The results differ significantly from the DAMA reported values at low energies but fall between the other previous measurements. We present the implications of the new quenching results for the dark matter interpretation of the DAMA modulation signal.

  14. Halo-independence with quantified maximum entropy at DAMA/LIBRA

    Energy Technology Data Exchange (ETDEWEB)

    Fowlie, Andrew, E-mail: andrew.j.fowlie@googlemail.com [ARC Centre of Excellence for Particle Physics at the Tera-scale, Monash University, Melbourne, Victoria 3800 (Australia)

    2017-10-01

    Using the DAMA/LIBRA anomaly as an example, we formalise the notion of halo-independence in the context of Bayesian statistics and quantified maximum entropy. We consider an infinite set of possible profiles, weighted by an entropic prior and constrained by a likelihood describing noisy measurements of modulated moments by DAMA/LIBRA. Assuming an isotropic dark matter (DM) profile in the galactic rest frame, we find the most plausible DM profiles and predictions for unmodulated signal rates at DAMA/LIBRA. The entropic prior contains an a priori unknown regularisation factor, β, that describes the strength of our conviction that the profile is approximately Maxwellian. By varying β, we smoothly interpolate between a halo-independent and a halo-dependent analysis, thus exploring the impact of prior information about the DM profile.

  15. Wind turbine clutter mitigation in coastal UHF radar.

    Science.gov (United States)

    Yang, Jing; Pan, Chao; Wang, Caijun; Jiang, Dapeng; Wen, Biyang

    2014-01-01

    Coastal UHF radar provides a unique capability to measure the sea surface dynamic parameters and detect small moving targets, by exploiting the low energy loss of electromagnetic waves propagating along the salty and good conducting ocean surface. It could compensate the blind zone of HF surface wave radar at close range and reach further distance than microwave radars. However, its performance is susceptible to wind turbines which are usually installed on the shore. The size of a wind turbine is much larger than the wavelength of radio waves at UHF band, which results in large radar cross section. Furthermore, the rotation of blades adds time-varying Doppler frequency to the clutter and makes the suppression difficult. This paper proposes a mitigation method which is based on the specific periodicity of wind turbine clutter and performed mainly in the time-frequency domain. Field experimental data of a newly developed UHF radar are used to verify this method, and the results prove its effectiveness.

  16. Model independent result on possible diurnal effect in DAMA/LIBRA-phase1

    Energy Technology Data Exchange (ETDEWEB)

    Bernabei, R.; D' Angelo, S.; Di Marco, A. [Universita di Roma ' ' Tor Vergata' ' , Dipt. di Fisica, Rome (Italy); INFN, Sezione Roma ' ' Tor Vergata' ' , Rome (Italy); Belli, P. [INFN, Sezione Roma ' ' Tor Vergata' ' , Rome (Italy); Cappella, F.; D' Angelo, A.; Prosperi, D. [Universita di Roma ' ' La Sapienza' ' , Dipt. di Fisica, Rome (Italy); INFN, Sezione Roma, Rome (Italy); Caracciolo, V.; Castellano, S.; Cerulli, R. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G. [Chinese Academy of Sciences, Institute of High Energy Physics, Beijing (China); Incicchitti, A. [INFN, Sezione Roma, Rome (Italy); Montecchia, F. [INFN, Sezione Roma ' ' Tor Vergata' ' , Rome (Italy); Universita di Roma ' ' Tor Vergata' ' , Dipt. di Ingegneria Civile e Ingegneria Informatica, Rome (Italy); Ye, Z.P. [Chinese Academy of Sciences, Institute of High Energy Physics, Beijing (China); University of Jing Gangshan, Jiangxi (China)

    2014-03-15

    The results obtained in the search for possible diurnal effect in the single-hit low energy data collected by DAMA/LIBRA-phase1 (total exposure 1.04 ton x year) deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN are presented. At the present level of sensitivity the presence of any significant diurnal variation and of diurnal time structures in the data can be excluded for both the cases of solar and sidereal time. In particular, the diurnal modulation amplitude expected, because of the Earth diurnal motion, on the basis of the DAMA dark matter annual modulation results is below the present sensitivity. (orig.)

  17. Further results on the WIMP annual modulation signature by DAMA/NaI

    International Nuclear Information System (INIS)

    Bernabei, R.; Belli, P.; Cappella, F.

    2005-01-01

    The ≅ 100 kg highly radiopure NaI(Tl) set-up of the DAMA project (DAMA/NaI) has investigated the model- independent WIMP annual modulation signature over seven annual cycles for a total exposure of 107731 kg x day, obtaining a model-independent evidence for the presence of a dark matter particle component in the galactic halo at 6.3 σ C.L.. Some of the many possible corollary model-dependent quests for the candidate particle have been investigated with the total exposure as well

  18. Model independent result on possible diurnal effect in DAMA/LIBRA-phase1

    International Nuclear Information System (INIS)

    Bernabei, R.; D'Angelo, S.; Di Marco, A.; Belli, P.; Cappella, F.; D'Angelo, A.; Prosperi, D.; Caracciolo, V.; Castellano, S.; Cerulli, R.; Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G.; Incicchitti, A.; Montecchia, F.; Ye, Z.P.

    2014-01-01

    The results obtained in the search for possible diurnal effect in the single-hit low energy data collected by DAMA/LIBRA-phase1 (total exposure 1.04 ton x year) deep underground at the Gran Sasso National Laboratory (LNGS) of the INFN are presented. At the present level of sensitivity the presence of any significant diurnal variation and of diurnal time structures in the data can be excluded for both the cases of solar and sidereal time. In particular, the diurnal modulation amplitude expected, because of the Earth diurnal motion, on the basis of the DAMA dark matter annual modulation results is below the present sensitivity. (orig.)

  19. RAPD fingerprinting: use in the analysis of mediterranean populations of European fallow deer, Dama dama Linnaeus, 1758 (Mammalia, Artiodactyla

    Directory of Open Access Journals (Sweden)

    Marco Masseti

    1996-12-01

    Full Text Available Abstract The aim of the present paper is to present a preliminary genetic survey of the fallow deer (Dama dama L., 1758 population of the island of Rhodes (Greece in order to verify its genetic variability. Italian population specimens were chosen as a control group because, as can be ascertained from literature, they have a very low level of variability. The analysis was carried out on hair samples obtained from each population. It was performed on a PCR modified method called RAPD which is based on the amplification of genomic DNA by using a single oligonucleotide of random sequence as a primer. The results of the analysis of the Rhodian specimens show clearly the presence of polymorphic individuals, absent in the Italian deer sampled.

  20. Results with the DAMA/NaI(Tl) experiment at LNGS

    International Nuclear Information System (INIS)

    Bernabei, R.; Amato, M.; Belli, P.; Cappella, F.; Cerulli, R.; Dai, C.J.; He, H.L.; Ignesti, G.; Incicchitti, A.; Kuang, H.H.; Ma, J.M.; Montecchia, F.; Nozzoli, F.; Prosperi, D.

    2002-01-01

    DAMA experiment is an observatory for rare events mainly devoted to WIMP search at the Gran Sasso National Laboratory of the I.N.F.N.. In this paper, the results obtained with the ≅ 100 kg NaI(Tl) set-up will be summarized, pointing out in particular those regarding the investigation of the WIMP annual modulation signature

  1. DamaGIS: a multisource geodatabase for collection of flood-related damage data

    Science.gov (United States)

    Saint-Martin, Clotilde; Javelle, Pierre; Vinet, Freddy

    2018-06-01

    Every year in France, recurring flood events result in several million euros of damage, and reducing the heavy consequences of floods has become a high priority. However, actions to reduce the impact of floods are often hindered by the lack of damage data on past flood events. The present paper introduces a new database for collection and assessment of flood-related damage. The DamaGIS database offers an innovative bottom-up approach to gather and identify damage data from multiple sources, including new media. The study area has been defined as the south of France considering the high frequency of floods over the past years. This paper presents the structure and contents of the database. It also presents operating instructions in order to keep collecting damage data within the database. This paper also describes an easily reproducible method to assess the severity of flood damage regardless of the location or date of occurrence. A first analysis of the damage contents is also provided in order to assess data quality and the relevance of the database. According to this analysis, despite its lack of comprehensiveness, the DamaGIS database presents many advantages. Indeed, DamaGIS provides a high accuracy of data as well as simplicity of use. It also has the additional benefit of being accessible in multiple formats and is open access. The DamaGIS database is available at https://doi.org/10.5281/zenodo.1241089" target="_blank">https://doi.org/10.5281/zenodo.1241089.

  2. Damaška and the faces of international criminal justice

    NARCIS (Netherlands)

    Swart, B.

    2008-01-01

    Mirjan Damaška 's scholarly publications provide important insights for the analysis of systems of criminal justice at the international level. This is particularly true for his major book: The Faces of Justice and State Authority - A Comparative Approach to the Legal Process. The book develops

  3. Results with the DAMA/NaI(Tl) experiment at LNGS

    CERN Document Server

    Bernabei, R; Belli, P; Cappella, F; Cerulli, R; Dai, C J; He, H L; Ignesti, G; Incicchitti, A; Kuang Hao Huai; Ma, J M; Montecchia, F; Nozzoli, F; Prosperi, D

    2002-01-01

    DAMA experiment is an observatory for rare events mainly devoted to WIMP search at the Gran Sasso National Laboratory of the I.N.F.N.. In this paper, the results obtained with the approx = 100 kg NaI(Tl) set-up will be summarized, pointing out in particular those regarding the investigation of the WIMP annual modulation signature.

  4. The reproductive performance of N'dama and Muturu cattle in ...

    African Journals Online (AJOL)

    Twelve primiparous cycling N'dama and Muturu cows comprising 8 Ndama and 4 Muturu Cows were subjected to three hour continous observations twice daily at 0630 - 0930hrs and 1500 - 1800 hrs for a period of 9 months during which oestrous behaviour and oestrous cycle characteristics of the cows were monitored.

  5. PREFACE: 11th International Conference on Damage Assessment of Structures (DAMAS 2015)

    Science.gov (United States)

    Wahab, M. A.

    2015-07-01

    This volume contains the proceedings of the 11th International Conference on Damage Assessment of Structures (DAMAS) 2015. DAMAS has a long history of almost 20 years. The first DAMAS conference took place in 1995 (Pescara, Italy), followed by a biannual meeting in 1997 (Sheffield, UK), 1999 (Dublin, Ireland), 2001 (Cardiff, UK), 2003 (Southampton, UK), 2005 (Gdansk, Poland), 2007 (Torino, Italy), 2009 (Beijing, China), 2011 (Oxford, UK) and 2013 (Dublin, Ireland). The eleventh edition of DAMAS conference series, DAMAS 2015, is hosted by Ghent University, Belgium, and is held at the congress center Het Pand in Ghent city. Ghent is the capital and the largest city of the East Flanders province of the Flemish region of Belgium. Het Pand is the culture and congress center of Ghent University and is a historical monument. The conference is established as a major international forum for research topics relevant to damage assessment of engineering structures and systems including numerical simulations, signal processing of sensor measurements and theoretical techniques as well as experimental case studies. The presentations of DAMAS 2015 are divided into 6 main sessions, namely 1) Structural Health and Condition Monitoring, 2) Damage in Civil Engineering, 3) Damage in Machineries, 4) Damage in Composite Materials, 5) Sensing and Sensors and 6) Signal Processing. The organising committee is grateful to keynote speakers; Professor Guido De Roeck, Head of Structural Mechanics Division, KULeuven, Belgium, for his keynote lecture entitled 'Structural Health Monitoring: highlights and challenges', Professor Weidong Zhu, Department of Mechanical Engineering, University of Maryland, USA, for his keynote lecture entitled 'Vibration-based Structural Damage Detection: Theory and Applications' and Professor Wieslaw Ostachowicz, Head of the Laboratory of Active Materials and Smart Structures, Polish Academy of Sciences, Poland, for his keynote lecture entitled 'Damage Assessment and

  6. RFID antenna design for circular polarization in UHF band

    Science.gov (United States)

    Shahid, Hamza; Khan, Muhammad Talal Ali; Tayyab, Umais; Irshad, Usama Bin; Alkhazraji, Emad; Javaid, Muhammad Sharjeel

    2017-05-01

    A miniature half cross dipole antenna for defense and aerospace RFID applications in UHF band is presented. The dipole printed line arms are half crossed shape on top of dielectric substrate backed by reactive impedance surface. The antenna fed by a coaxial cable at the gap separating the dipole arms. Our design is intended to work at 2.42 GHz for RFID readers. The radiation pattern obtained has HPBW of 112, return loss of 22.24 dB and 90 MHz bandwidth.

  7. Copper thin film for RFID UHF antenna on flexible substrate

    International Nuclear Information System (INIS)

    Tran, Nhan Ai; Tran, Huy Nam; Dang, Mau Chien; Fribourg-Blanc, Eric

    2010-01-01

    A process flow using photolithography and sputtering was studied for copper antenna fabrication on thin poly(ethylene terephthalate) (PET) substrate. The lift-off route was chosen for its flexibility at laboratory scale. It was clarified that the cleaning of PET is an important step that necessitates mild oxygen plasma etching. Then copper is sputter deposited after photolithographic definition of the antenna. Care is necessary since PET, as a very flexible substrate, is temperature sensitive. The temperature increase generated by the impact of deposited copper should be maintained below the glass transition temperature of the polymer to avoid detrimental deformation. dc power of 40 to 50 W was found to be the maximum possible sputtering power for commercial PET. It was found that the resistivity of the thin film is below two times the bulk resistivity of copper for a deposition pressure below 4×10 −3  mbar and thickness above 450 nm. These results enable the reliable fabrication of copper RFID UHF antennae on a PET substrate for further testing of new tag designs. The present paper summarizes the effort to test new designs of antennae for RadioFrequency IDentification (RFID) Ultra High Frequency (UHF) tags, for use in various applications (e.g. object tracking and environment monitoring) in Vietnam

  8. Detection of moving humans in UHF wideband SAR

    Science.gov (United States)

    Sjögren, Thomas K.; Ulander, Lars M. H.; Frölind, Per-Olov; Gustavsson, Anders; Stenström, Gunnar; Jonsson, Tommy

    2014-06-01

    In this paper, experimental results for UHF wideband SAR imaging of humans on an open field and inside a forest is presented. The results show ability to detect the humans and suggest possible ways to improve the results. In the experiment, single channel wideband SAR mode of the UHF UWB system LORA developed by Swedish Defence Research Agency (FOI). The wideband SAR mode used in the experiment was from 220 to 450 MHz, thus with a fractional bandwidth of 0.68. Three humans walking and one stationary were available in the scene with one of the walking humans in the forest. The signature of the human in the forest appeared on the field, due to azimuth shift from the positive range speed component. One human on the field and the one in the forest had approximately the same speed and walking direction. The signatures in the SAR image were compared as a function of integration time based on focusing using the average relative speed of these given by GPS logs. A signal processing gain was obtained for the human in forest until approximately 15 s and 35 s for the human on the field. This difference is likely explained by uneven terrain and trees in the way, causing a non-straight walking path.

  9. Comportement alimentaire de la gazelle dama mhorr (Nanger dama mhorr, Pallas, 1766 en semi-liberté dans la Réserve de Faune du Ferlo Nord de Ranérou, Sénégal

    Directory of Open Access Journals (Sweden)

    Sarr, SM.

    2018-01-01

    Full Text Available Feeding Behavior of the Dama Mhorr Gazelle (Nanger dama mhorr, Pallas, 1766 in Semi-free Range in the North Ferlo of Ranerou Wildlife Reserve, Senegal. Gazelle dama mhorr (Nanger dama mhorr, Pallas, 1766 is a Sahelo-Saharan antelope that once inhabited northern Senegal. The combination of several natural and anthropogenic factors contributed to its extinction by the 1970s. Today, it lives in semi-free range in a 1200 ha enclosure in the North Ferlo Wildlife Reserve (NFWR. This study aims at a better understanding of its feeding behavior in order to improve its management. To achieve this objective, an ecological monitoring was carried out between February and May 2016, for one week per month, giving a total of four weeks of monitoring. The results of this monitoring showed that the gazelle dama mhorr consumes tree species, mainly Leptadenia hastata, Boscia senegalensis, Guiera senegalensis for their leaves, and Acacia seyal for its flowers. It also consumes dry grass. No results were noted regarding drinking frequency. The obtained results can be used to monitor the dynamics of the populations of Nanger dama mhorr.

  10. No role for neutrons, muons and solar neutrinos in the DAMA annual modulation results

    Energy Technology Data Exchange (ETDEWEB)

    Bernabei, R.; D' Angelo, S.; Di Marco, A. [Universita di Roma ' ' Tor Vergata' ' , Dipt. di Fisica, Rome (Italy); INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Belli, P. [INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Cappella, F.; Caracciolo, V.; Cerulli, R. [INFN, Laboratori Nazionali del Gran Sasso, Assergi (Italy); Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G. [Chinese Academy of Sciences, Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, P.O. Box 918/3, Beijing (China); D' Angelo, A.; Incicchitti, A. [Universita di Roma ' ' La Sapienza' ' , Dipt. di Fisica, Rome (Italy); INFN, sez. Roma, Rome (Italy); Montecchia, F. [INFN, sez. Roma ' ' Tor Vergata' ' , Rome (Italy); Universita di Roma ' ' Tor Vergata' ' , Dipt. di Ingegneria Civile e Ingegneria Informatica, Rome (Italy); Ye, Z.P. [Chinese Academy of Sciences, Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, P.O. Box 918/3, Beijing (China); University of Jing Gangshan, Ji' an, Jiangxi (China)

    2014-12-01

    This paper summarizes in a simple and intuitive way why the neutrons, the muons and the solar neutrinos cannot give any significant contribution to the DAMA annual modulation results. A number of these elements have already been presented in individual papers; they are recalled here together with few simple considerations which demonstrate the incorrectness of the claim reported in Davis (PRL 113:081302, 2014). (orig.)

  11. No role for neutrons, muons and solar neutrinos in the DAMA annual modulation results

    International Nuclear Information System (INIS)

    Bernabei, R.; D'Angelo, S.; Di Marco, A.; Belli, P.; Cappella, F.; Caracciolo, V.; Cerulli, R.; Dai, C.J.; He, H.L.; Kuang, H.H.; Ma, X.H.; Sheng, X.D.; Wang, R.G.; D'Angelo, A.; Incicchitti, A.; Montecchia, F.; Ye, Z.P.

    2014-01-01

    This paper summarizes in a simple and intuitive way why the neutrons, the muons and the solar neutrinos cannot give any significant contribution to the DAMA annual modulation results. A number of these elements have already been presented in individual papers; they are recalled here together with few simple considerations which demonstrate the incorrectness of the claim reported in Davis (PRL 113:081302, 2014). (orig.)

  12. Halo-independent determination of the unmodulated WIMP signal in DAMA: the isotropic case

    Energy Technology Data Exchange (ETDEWEB)

    Gondolo, Paolo [Department of Physics, University of Utah, 115 South 1400 East #201, Salt Lake City, Utah 84112-0830 (United States); Scopel, Stefano, E-mail: paolo.gondolo@utah.edu, E-mail: scopel@sogang.ac.kr [Department of Physics, Sogang University, Seoul 121-742 (Korea, Republic of)

    2017-09-01

    We present a halo-independent determination of the unmodulated signal corresponding to the DAMA modulation if interpreted as due to dark matter weakly interacting massive particles (WIMPs). First we show how a modulated signal gives information on the WIMP velocity distribution function in the Galactic rest frame from which the unmodulated signal descends. Then we describe a mathematically-sound profile likelihood analysis in which the likelihood is profiled over a continuum of nuisance parameters (namely, the WIMP velocity distribution). As a first application of the method, which is very general and valid for any class of velocity distributions, we restrict the analysis to velocity distributions that are isotropic in the Galactic frame. In this way we obtain halo-independent maximum-likelihood estimates and confidence intervals for the DAMA unmodulated signal. We find that the estimated unmodulated signal is in line with expectations for a WIMP-induced modulation and is compatible with the DAMA background+signal rate. Specifically, for the isotropic case we find that the modulated amplitude ranges between a few percent and about 25% of the unmodulated amplitude, depending on the WIMP mass.

  13. Implications of the DAMA and CRESST experiments for mirror matter-type dark matter

    International Nuclear Information System (INIS)

    Foot, R.

    2004-01-01

    Mirror atoms are expected to be a significant component of the galactic dark matter halo if mirror matter is identified with the nonbaryonic dark matter in the Universe. Mirror matter can interact with ordinary matter via gravity and via the photon-mirror photon kinetic mixing interaction--causing mirror charged particles to couple to ordinary photons with an effective electric charge εe. This means that the nuclei of mirror atoms can elastically scatter off the nuclei of ordinary atoms, leading to nuclear recoils, which can be detected in existing dark matter experiments. We show that the dark matter experiments most sensitive to this type of dark matter candidate (via the nuclear recoil signature) are the DAMA/NaI and CRESST/Sapphire experiments. Furthermore, we show that the impressive annual modulation signal obtained by the DAMA/NaI experiment can be explained by mirror matter-type dark matter for vertical bar ε vertical bar ∼5x10 -9 and is supported by DAMA's absolute rate measurement as well as the CRESST/Sapphire data. This value of vertical bar ε vertical bar is consistent with the value obtained from various solar system anomalies including the Pioneer spacecraft anomaly, anomalous meteorite events and lack of small craters on the asteroid Eros. It is also consistent with standard big bang nucleosynthesis

  14. Rencontres de Moriond EW 2012: Theorists disprove one claim against DAMA/LIBRA

    CERN Multimedia

    Pauline Gagnon

    2012-01-01

    Josef Pradler, a theorist from the Perimeter Institute in Canada presented today at the Moriond conference new calculations that could disprove the main criticism of the DAMA oscillation data: the phenomenon cannot be produced by cosmic muons.   For more than 13 annual cycles, the DAMA experiment has been accumulating data in the Gran Sasso laboratory, looking for signs of dark matter. The ~250 kg NaI detector has revealed a 8-sigma modulated signal that stands unchallenged. Lately, though, several people have questioned the results, suggesting that the observed modulation could be due to cosmic muons. Josef Pradler and his colleagues Spencer Chang (University of Oregon) and Itay Yavin (McMaster University and Perimeter Institute) just published a new analysis that shows in fact that the DAMA/LIBRA data is inconsistent with the cosmic muon hypothesis with 99% CL. They compared the amplitude, phase, spectral power and correlation of cosmic muon data taken with the LVD (Large Volume Detector) exp...

  15. Generalized spin-dependent WIMP-nucleus interactions and the DAMA modulation effect

    Energy Technology Data Exchange (ETDEWEB)

    Scopel, Stefano; Yoon, Kook-Hyun; Yoon, Jong-Hyun, E-mail: scopel@sogang.ac.kr, E-mail: koreasds@naver.com, E-mail: pledge200@gmail.com [Department of Physics, Sogang University, Seoul (Korea, Republic of)

    2015-07-01

    Guided by non-relativistic Effective Field Theory (EFT) we classify the most general spin-dependent interactions between a fermionic Weakly Interacting Massive Particle (WIMP) and nuclei, and within this class of models we discuss the viability of an interpretation of the DAMA modulation result in terms of a signal from WIMP elastic scatterings using a halo-independent approach. We find that, although several relativistic EFT's can lead to a spin-dependent cross section, in some cases with an explicit, non-negligible dependence on the WIMP incoming velocity, three main scenarios can be singled out in the non-relativistic limit which approximately encompass them all, and that only differ by their dependence on the transferred momentum. For two of them compatibility between DAMA and other constraints is possible for a WIMP mass below 30 GeV, but only for a WIMP velocity distribution in the halo of our Galaxy which departs from a Maxwellian. This is achieved by combining a suppression of the WIMP effective coupling to neutrons (to evade constraints from xenon and germanium detectors) to an explicit quadratic or quartic dependence of the cross section on the transferred momentum (that leads to a relative enhancement of the expected rate off sodium in DAMA compared to that off fluorine in droplet detectors and bubble chambers). For larger WIMP masses the same scenarios are excluded by scatterings off iodine in COUPP.

  16. Carcass and meat characteristics from farm-raised and wild fallow deer (Dama dama) and red deer (Cervus elaphus): A review.

    Science.gov (United States)

    Kudrnáčová, Eva; Bartoň, Luděk; Bureš, Daniel; Hoffman, Louwrens C

    2018-07-01

    Deer species are utilised for food, hunting and other products throughout the world. Consumers are typically exposed to venison derived predominantly from both farm-raised or wild fallow (Dama dama) and red deer (Cervus elaphus). The production of venison under farm conditions, compared to the meat of deer hunted in the wild, allows for a regular supply of a consistently good meat. It is lean, tasty, and rich in proteins and minerals, with a low content of fat and cholesterol. Overall, the worldwide demand for meat is still growing, and both the potential of farming deer species and their use as meat producers have led to an increased interest in venison. The current knowledge about various factors (e.g. nutrition, age, sex, condition, season) affecting venison and game meat has significantly increased during past decades but information regarding the interaction between production system or pre- and post-slaughter handling and ultimate deer meat quality are still very limited. Copyright © 2018 Elsevier Ltd. All rights reserved.

  17. Different functional modulation by heterotropic ligands (2,3-diphosphoglycerate and chlorides) of the two haemoglobins from fallow-deer (Dama dama).

    Science.gov (United States)

    Angeletti, M; Pucciarelli, S; Priori, A M; Canofeni, S; Barra, D; Fioretti, E; Coletta, M

    2001-02-01

    Two haemoglobin components have been identified and purified from fallow-deer (Dama dama) erythrocytes. They are present in similar amounts and the two tetrameric molecules share the same alpha chain, while two different beta chains are detected in the two components. The beta chains differ by 14 residues, even though they both have 145 amino-acid residues, which account for a molecular mass of 16,023 and 16,064 Da, respectively, while alpha chain has 141 residues, yielding a molecular mass of 15,142 Da. Compared with human Hb, the N-terminal region of both beta chains shows deletion of Val beta 1 and the replacement of His beta 2 by a methionyl residue, a modification which is common to most ruminant haemoglobins. Although both isolated components show a low intrinsic affinity for oxygen, meaningful differences between the two haemoglobins have been found with respect to the effect of heterotropic effectors, such as 2,3-diphosphoglycerate and chloride ions. In view of the high sequence homology between the two components, the different effect of heterotropic ligands has been tentatively correlated to possible localized structural variations between beta chains of the two haemoglobin components.

  18. GPM GROUND VALIDATION NOAA UHF 449 PROFILER RAW DATA SPC FORMAT MC3E V1

    Data.gov (United States)

    National Aeronautics and Space Administration — The NOAA UHF 449 Profiler Raw SPC foramt data was collected during the NASA supported Midlatitude Continental Convective Clouds Experiment (MC3E). The Ultra High...

  19. GPM GROUND VALIDATION NOAA UHF 449 PROFILER RAW DATA SPC FORMAT MC3E V1

    Data.gov (United States)

    National Aeronautics and Space Administration — The GPM Ground Validation NOAA UHF 449 Profiler Raw Data SPC Format MC3E dataset was collected during the NASA supported Midlatitude Continental Convective Clouds...

  20. A Numerical Estimation of a RFID Reader Field and SAR inside a Blood Bag at UHF

    Directory of Open Access Journals (Sweden)

    Alessandro Fanti

    2016-11-01

    Full Text Available In this paper, the effects of UHF electromagnetic fields produced by a RFID reader on a blood bag are evaluated numerically in several configurations. The results of the simulation, field level and distribution, specific absorption rate (SAR, and heating time show that an exposure to a typical reader field leads to a temperature increase smaller than 0.1 C and to a SAR smaller than 1 W/kg. As a consequence, no adverse biological effects occur during a typical UHF RFID reading cycle on a blood bag. Therefore, the blood contained in a bag traced using UHF-RFID is as safe as those traced using barcodes. The proposed analysis supports the use of UHF RFID in the blood transfusion supply chain.

  1. Colour stability and water-holding capacity of M. longissimus and carcass characteristics in fallow deer (Dama dama grazed on natural pasture or fed barley

    Directory of Open Access Journals (Sweden)

    Eva Wiklund

    2005-03-01

    Full Text Available The effects of feeding regimen on carcass characteristics, meat colour and water-holding capacity of M. longissimus were studied in 24 female fallow deer (Dama dama. All animals were farm raised; twelve were grazed on pasture and twelve were fed barley and a small amount of hay prior to slaughter. The animals were slaughtered at two occasions (during the Southern Hemisphere spring; after 19 weeks of feeding (n=12; 6 grazing and 6 barley fed animals; group 1 and after 24 weeks of feeding (n=12; 6 grazing and 6 barley fed animals; group 2. The barley/hay-fed deer had significantly higher body condition scores and carcass weights than the pasture raised group. No difference in meat ultimate pH values between the treatment groups was recorded. The meat from the pasture raised deer had significantly longer colour display life after 2 and 3 weeks of refrigerated storage (+ 2.0 ºC in vacuum bags. There was no difference in drip loss between the two treatment groups. However, significantly lower drip losses were found in meat from the animals in group 2 compared with the ones in group 1 (P ≤ 0.001. It was concluded that the feeding regimen of the animals is an important factor that contributes to the variation in quality of fresh chilled deer meat (venison, mainly the colour stability and display life of vacuum packaged meat.Abstract in Swedish / Sammanfattning: I denna undersökning ingick 24 dovhjortshindar (Dama dama för att studera effekterna av olika typer av foder (bete och korn på slaktkroppskvalitet samt färg och vattenhållande förmåga i köttet (M. longissimus. Alla djur var uppfödda på en hjortfarm, 12 betade gräs och 12 utfodrades med korn och en liten mängd hö före slakt. Djuren slaktades vid två olika tillfällen (under våren på det södra halvklotet; efter 19 veckors utfodring (n=12; 6 betesdjur och 6 kornfodrade djur; grupp 1 och efter 24 veckors utfodring (n=12; 6 betesdjur och 6 kornfodrade djur; grupp 2. De dovhjortar

  2. Dama roberti, a new species of deer from the early Middle Pleistocene of Europe, and the origins of modern fallow deer

    Science.gov (United States)

    Breda, Marzia; Lister, Adrian M.

    2013-06-01

    The ancestry of the modern fallow deer, Dama dama, has been tentatively traced back to Pliocene/Early Pleistocene forms referred to 'Pseudodama', characterized by unpalmated three- or four-point antlers. By the late Middle Pleistocene, Dama with palmated antlers appears, as Dama dama clactoniana. However, fallow deer from the interim period, the early Middle Pleistocene, are poorly-known. A new specimen from Pakefield (Suffolk, UK), represented by a portion of cranium with a substantial part of both antlers plus a mandible and scapula, is the most complete medium-sized deer specimen from the British early Middle Pleistocene (ca 700 ka). The position and orientation of the basal tine, together with dental characters and mandibular morphology, are typical of fallow deer. The narrow palmation is reminiscent of D. dama clactoniana, but the lack of palmation tines is unique. Moreover, the lack of second (and third) tines in an adult specimen differs from both D. dama dama and D. d. clactoniana, being a primitive character shared with the last representatives of 'Pseudodama' which, on the other hand, has a circular beam lacking any palmation. This combination of features justifies the erection of a new species provisionally placed within the genus Dama, Dama roberti n. sp. Another specimen, from Soleilhac (Auvergne, France), represented by portions of the two antlers, a mandible and a tibia, shares antler morphology with the Pakefield specimen and can be ascribed to the same new species. Isolated antler and dental remains from coeval British sites are tentatively ascribed to D. roberti n. sp. The new species has implications for the ancestry of modern fallow deer.

  3. Exploring the mirror matter interpretation of the DAMA experiment: Has the dark matter problem been solved?

    OpenAIRE

    Foot, R.

    2004-01-01

    The self consistency between the impressive DAMA annual modulation signal and the differential energy spectrum is an important test for dark matter candidates.Mirror matter-type dark matter passes this test while other dark matter candidates, including standard (spin-independent) WIMPs and mini-electric charged particle dark matter, do not do so well.We argue that the unique properties of mirror matter-type dark matter seem to be just those required to fully explain the data, suggesting that ...

  4. Juan Mayorga's adaptations of Lope: La dama boba in the 21st century

    Directory of Open Access Journals (Sweden)

    Mónica Molanes

    2012-12-01

    Full Text Available The adaptations made by one of today’s most eminent playwrights, Juan Mayorga, on the texts by Lope de Vega which were represented during the first decade of the 21st century allow us to analyse some of the most relevant aspects in the reception, canonization and theatrical interpretation of 17th century theatre. This study will thus focus on Lope’s La Dama Boba and the adaptation offered by Juan Mayorga for the Compañía Nacional de Teatro Clásico, directed by Helena Pimenta in 2002.

  5. LA LIGA DE DAMAS CHILENAS: DE LA CRUZADA MORALIZADORA AL SINDICALISMO FEMENINO CATOLICO, 1912-1918

    OpenAIRE

    ROBLES PARADA, ANDREA ISOLINA

    2013-01-01

    INTRODUCCION A comienzos del siglo XX la representación de la mujer de la clase alta chilena se vio envuelta en la convergencia entre imaginarios tradicionales y experiencias nuevas. A partir de este supuesto estudiamos la particularidad de los cambios que suscitó la modernidad en las mujeres católicas de la elite que organizaron La Liga de Damas Chilenas. A través de esta asociación, fundada en 1912, las mujeres católicas comenzaron a int...

  6. HF RFID versus UHF RFID--Technology for Library Service Transformation at City University of Hong Kong

    Science.gov (United States)

    Ching, Steve H.; Tai, Alice

    2009-01-01

    Since libraries first used RFID systems in the late 1990s, more and more libraries have identified the advantages of the technology. With advances in HF and UHF RFID, both alternatives are now viable in library applications. While some librarians are still skeptical towards UHF RFID as unproven in the library arena, the City University of Hong…

  7. Modeling and analysis of power extraction circuits for passive UHF RFID applications

    International Nuclear Information System (INIS)

    Fan Bo; Dai Yujie; Zhang Xiaoxing; Lue Yingjie

    2009-01-01

    Modeling and analysis of far field power extraction circuits for passive UHF RF identification (RFID) applications are presented. A mathematical model is derived to predict the complex nonlinear performance of UHF voltage multiplier using Schottky diodes. To reduce the complexity of the proposed model, a simple linear approximation for Schottky diode is introduced. Measurement results show considerable agreement with the values calculated by the proposed model. With the derived model, optimization on stage number for voltage multiplier to achieve maximum power conversion efficiency is discussed. Furthermore, according to the Bode-Fano criterion and the proposed model, a limitation on maximum power up range for passive UHF RFID power extraction circuits is also studied.

  8. Experimental Study on Inkjet-Printed Passive UHF RFID Tags on Versatile Paper-Based Substrates

    Directory of Open Access Journals (Sweden)

    Han He

    2016-01-01

    Full Text Available We present the possibilities and challenges of passive UHF RFID tag antennas manufactured by inkjet printing silver nanoparticle ink on versatile paper-based substrates. The most efficient manufacturing parameters, such as the pattern resolution, were determined and the optimal number of printed layers was evaluated for each substrate material. Next, inkjet-printed passive UHF RFID tags were fabricated on each substrate with the optimized parameters and number of layers. According to our measurements, the tags on different paper substrates showed peak read ranges of 4–6.5 meters and the tags on different cardboard substrates exhibited peak read ranges of 2–6 meters. Based on their wireless performance, these inkjet-printed paper-based passive UHF RFID tags are sufficient for many future wireless applications and comparable to tags fabricated on more traditional substrates, such as polyimide.

  9. The Anti-RFI Design of Intelligent Electric Energy Meters with UHF RFID

    Science.gov (United States)

    Chen, Xiangqun; Huang, Rui; Shen, Liman; chen, Hao; Xiong, Dezhi; Xiao, Xiangqi; Liu, Mouhai; Xu, Renheng

    2018-03-01

    In order to solve the existing artificial meter reading watt-hour meter industry is still slow and inventory of common problems, using the uhf radio frequency identification (RFID) technology and intelligent watt-hour meter depth fusion, which has a one-time read multiple tags, identification distance, high transmission rate, high reliability, etc, while retaining the original asset management functions, in order to ensure the uhf RFID and minimum impact on the operation of the intelligent watt-hour meter, proposed to improve the stability of the electric meter system while working at the same time, this paper designs the uhf RFID intelligent watt-hour meter radio frequency interference resistance, put forward to improve intelligent watt-hour meter electromagnetic compatibility design train of thought, and introduced its power and the hardware circuit design of printed circuit board, etc.

  10. Compact broadband circularly polarised slot antenna for universal UHF RFID readers

    DEFF Research Database (Denmark)

    Xu, Bo; Zhang, Shuai; Liu, Yusha

    2015-01-01

    A compact broadband circularly polarised (CP) slot antenna is designed for universal ultra-high-frequency (UHF) radio frequency identification (RFID) readers. The antenna consists of an L-shaped metal strip and a square-slot-loaded ground plane with four tuning stubs. The total size is 100 mm×100mm......×1.6 mm. The measured –10 dB impedance bandwidth is 40.7% (772–1166 MHz) and the measured 3 dB axial ratio (AR) bandwidth is 13.9% (840–965 MHz). Both the impedance and AR bandwidth cover the worldwide UHF RFID band....

  11. Analysis strategies for high-resolution UHF-fMRI data.

    Science.gov (United States)

    Polimeni, Jonathan R; Renvall, Ville; Zaretskaya, Natalia; Fischl, Bruce

    2018-03-01

    Functional MRI (fMRI) benefits from both increased sensitivity and specificity with increasing magnetic field strength, making it a key application for Ultra-High Field (UHF) MRI scanners. Most UHF-fMRI studies utilize the dramatic increases in sensitivity and specificity to acquire high-resolution data reaching sub-millimeter scales, which enable new classes of experiments to probe the functional organization of the human brain. This review article surveys advanced data analysis strategies developed for high-resolution fMRI at UHF. These include strategies designed to mitigate distortion and artifacts associated with higher fields in ways that attempt to preserve spatial resolution of the fMRI data, as well as recently introduced analysis techniques that are enabled by these extremely high-resolution data. Particular focus is placed on anatomically-informed analyses, including cortical surface-based analysis, which are powerful techniques that can guide each step of the analysis from preprocessing to statistical analysis to interpretation and visualization. New intracortical analysis techniques for laminar and columnar fMRI are also reviewed and discussed. Prospects for single-subject individualized analyses are also presented and discussed. Altogether, there are both specific challenges and opportunities presented by UHF-fMRI, and the use of proper analysis strategies can help these valuable data reach their full potential. Copyright © 2017 Elsevier Inc. All rights reserved.

  12. Comparison of UHF measurements with the propagation model of Recommendation ITU-R P.1546

    NARCIS (Netherlands)

    Witvliet, B.A.; Wijninga, P.W.; van Maanen, E.; Smith, B.

    2010-01-01

    This report describes a radio propagation measurement campaign that has been performed along paths between the Netherlands and the United Kingdom. The campaign focused on UHF propagation on mixed land/sea paths. Special attention was given to calibration accuracy and validation of the measurement

  13. Inkjet printing of UHF antennas on corrugated cardboards for packaging applications

    Energy Technology Data Exchange (ETDEWEB)

    Sowade, Enrico, E-mail: enrico.sowade@mb.tu-chemnitz.de [Digital Printing and Imaging Technology, Technische Universität Chemnitz, Chemnitz (Germany); Göthel, Frank [Digital Printing and Imaging Technology, Technische Universität Chemnitz, Chemnitz (Germany); Zichner, Ralf [Department Printed Functionalities, Fraunhofer Institute for Electronic Nano Systems (ENAS), Chemnitz (Germany); Baumann, Reinhard R. [Digital Printing and Imaging Technology, Technische Universität Chemnitz, Chemnitz (Germany); Department Printed Functionalities, Fraunhofer Institute for Electronic Nano Systems (ENAS), Chemnitz (Germany)

    2015-03-30

    Highlights: • Inkjet printing of UHF antennas on cardboard substrates. • Development of primer layer to compensate the absorptiveness of the cardboard and the rough surface. • Manufacturing of UHF antennas in a fully digital manner for packaging applications. - Abstract: In this study, a method based on inkjet printing has been established to develop UHF antennas on a corrugated cardboard for packaging applications. The use of such a standardized, paper-based packaging substrate as material for printing electronics is challenging in terms of its high surface roughness and high ink absorption rate, especially when depositing very thin films with inkjet printing technology. However, we could obtain well-defined silver layers on the cardboard substrates due to a primer layer approach. The primer layer is based on a UV-curable ink formulation and deposited as well as the silver ink with inkjet printing technology. Industrial relevant printheads were chosen for the deposition of the materials. The usage of inkjet printing allows highest flexibility in terms of pattern design. The primer layer was proven to optimize the surface characteristics of the substrate, mainly reducing the surface roughness and water absorptiveness. Thanks to the primer layer approach, ultra-high-frequency (UHF) radio-frequency identification (RFID) antennas were deposited by inkjet printing on the corrugated cardboards. Along with the characterization and interpretation of electrical properties of the established conductive antenna patterns, the performance of the printed antennas were analyzed in detail by measuring the scattering parameter S{sub 11} and the antenna gain.

  14. A Broadband UHF Tag Antenna For Near-Field and Far-Field RFID Communications

    Directory of Open Access Journals (Sweden)

    M. Dhaouadi

    2014-12-01

    Full Text Available The paper deals with the design of passive broadband tag antenna for Ultra-High Frequency (UHF band. The antenna is intended for both near and far fields Radio Frequency Identification (RFID applications. The meander dipole tag antenna geometry modification is designed for frequency bandwidth increasing. The measured bandwidth of the proposed broadband Tag antenna is more than 140 MHz (820–960 MHz, which can cover the entire UHF RFID band. A comparison between chip impedance of datasheet and the measured chip impedance has been used in our simulations. The proposed progressive meandered antenna structure, with an overall size of 77 mm × 14 mm × 0.787 mm, produces strong and uniform magnetic field distribution in the near-field zone. The antenna impedance is matched to common UHF chips in market simply by tuning its capacitive and inductive values since a perfect matching is required in the antenna design in order to enhance the near and the far field communications. Measurements confirm that the designed antenna exhibits good performance of Tag identification for both near-field and far-field UHF RFID applications.

  15. The effects of single bit quantization on direction of arrival estimation of UHF RFID tags

    NARCIS (Netherlands)

    Huiting, J.; Kokkeler, Andre B.J.; Smit, Gerardus Johannes Maria

    2016-01-01

    Phased arrays can be used to estimate the direction-of-arrival (DOA) of UHF RFID tags. To save on energy consumption and hardware costs, in this paper we explore the possibility of using single bit analog-to-digital converters for our phased array setup. This setup consists of an off-the-shelf

  16. FSL based estimation of white space availability in UHF TV bands in Bergvliet, South Africa

    CSIR Research Space (South Africa)

    Lysko, AA

    2012-09-01

    Full Text Available in the UHF TV frequency bands. The free space loss (FSL) formula, together with a line of sight condition, are applied to the information about the location and power of TV transmitters around this area. The predictions show 61% correlation between...

  17. Filosofía para damas hoy: el mundo de Sofía

    Directory of Open Access Journals (Sweden)

    Mataix Loma, Carmen

    2005-12-01

    Full Text Available The author compares one of the philosophical best sellers, Sophia's World, with traditional «literature for Ladies», a very famous genre in the Enlightenment The book supports masculine-feminine duality as well as adult-child and reality- appearance dualities.

    La autora compara uno de los libros de divulgación filosófica de más éxito, El mundo de Sofía, con la tradicional «literatura para damas» desarrollada como género en la Ilustración. El libro mantiene la dualidad masculino-femenino, a la vez que la de adulto- niño y la tradicional filosófica, apariencia-realidad.

  18. Information flow in the DAMA project beyond database managers: information flow managers

    Science.gov (United States)

    Russell, Lucian; Wolfson, Ouri; Yu, Clement

    1996-12-01

    To meet the demands of commercial data traffic on the information highway, a new look at managing data is necessary. One projected activity, sharing of point of sale information, is being considered in the Demand Activated Manufacturing Project (DAMA) of the American Textile Partnership (AMTEX) project. A scenario is examined in which 100 000 retail outlets communicate over a period of days. They provide the latest estimate of demand for sewn products across a chain of 26 000 suppliers through the use of bill of materials explosions at four levels of detail. Enabling this communication requires an approach that shares common features with both workflows and database management. A new paradigm, the information flow manager, is developed to handle this situation, including the case where members of the supply chain fail to communicate and go out of business. Techniques for approximation are introduced so as to keep estimates of demand as current as possible.

  19. Dark matter with pseudoscalar-mediated interactions explains the DAMA signal and the galactic center excess.

    Science.gov (United States)

    Arina, Chiara; Del Nobile, Eugenio; Panci, Paolo

    2015-01-09

    We study a Dirac dark matter particle interacting with ordinary matter via the exchange of a light pseudoscalar, and analyze its impact on both direct and indirect detection experiments. We show that this candidate can accommodate the long-standing DAMA modulated signal and yet be compatible with all exclusion limits at 99(S)% C.L. This result holds for natural choices of the pseudoscalar-quark couplings (e.g., flavor universal), which give rise to a significant enhancement of the dark matter-proton coupling with respect to the coupling to neutrons. We also find that this candidate can accommodate the observed 1-3 GeV gamma-ray excess at the Galactic center and at the same time have the correct relic density today. The model could be tested with measurements of rare meson decays, flavor changing processes, and searches for axionlike particles with mass in the MeV range.

  20. UHF Signal Processing and Pattern Recognition of Partial Discharge in Gas-Insulated Switchgear Using Chromatic Methodology.

    Science.gov (United States)

    Wang, Xiaohua; Li, Xi; Rong, Mingzhe; Xie, Dingli; Ding, Dan; Wang, Zhixiang

    2017-01-18

    The ultra-high frequency (UHF) method is widely used in insulation condition assessment. However, UHF signal processing algorithms are complicated and the size of the result is large, which hinders extracting features and recognizing partial discharge (PD) patterns. This article investigated the chromatic methodology that is novel in PD detection. The principle of chromatic methodologies in color science are introduced. The chromatic processing represents UHF signals sparsely. The UHF signals obtained from PD experiments were processed using chromatic methodology and characterized by three parameters in chromatic space ( H , L , and S representing dominant wavelength, signal strength, and saturation, respectively). The features of the UHF signals were studied hierarchically. The results showed that the chromatic parameters were consistent with conventional frequency domain parameters. The global chromatic parameters can be used to distinguish UHF signals acquired by different sensors, and they reveal the propagation properties of the UHF signal in the L-shaped gas-insulated switchgear (GIS). Finally, typical PD defect patterns had been recognized by using novel chromatic parameters in an actual GIS tank and good performance of recognition was achieved.

  1. Experimental Investigation on Propagation Characteristics of PD Radiated UHF Signal in Actual 252 kV GIS

    Directory of Open Access Journals (Sweden)

    Tianhui Li

    2017-07-01

    Full Text Available For partial discharge (PD diagnostics in gas insulated switchgears (GISs based on the ultra-high-frequency (UHF method, it is essential to study the attenuation characteristics of UHF signals so as to improve the application of the UHF technique. Currently, the performance of UHF has not been adequately considered in most experimental research, while the constructive conclusions about the installation and position of UHF sensors are relatively rare. In this research, by using a previously-designed broadband sensor, the output signal is detected and analyzed experimentally in a 252 kV GIS with L-shaped structure and disconnecting switch. Since the relative position of the sensor and the defect is usually fixed by prior research, three circumferential angle positions of the defect in cross section are performed. The results are studied by time, statistics and frequency analyses. This identifies that the discontinuity conductor of DS will lead to a rise of both the peak to peak value (Vpp and the transmission rate of the UHF signal. Then, the frequency analysis indicates that the reason for the distinction of signal amplitude and transmission rate is that the mode components of the PD signal are distinctively affected by the special structure of GIS. Finally, the optimal circumferential angle position of the UHF Sensor is given based on the comparison of transmission rates.

  2. Abundancia, diversidad y categoría ecológica de los peces en estero damas y estero palo seco, Costa Rica

    Directory of Open Access Journals (Sweden)

    Hubert Araya

    2016-03-01

    Full Text Available Se trabajó de junio de 1986 a febrero de 1987 en una estación de muestreo en el estero Palo Seco y en dos en el estero Damas (Damas y San Bosco, Pacífico Central, Costa Rica. La temperatura del agua no presentó diferencias significativas entre las estaciones Damas y San Bosco, pero sí entre Damas-Palo Seco y San Bosco-Palo Seco. La salinidad varió significativamente entre las tres estaciones y el pH no mostró diferencias significativas. Se recolectaron representantes de 25 familias, 39 géneros y 54 especies. De las especies, 18 comparten los tres sitios de muestreo, siete se hallaron únicamente en Palo Seco, cinco en Damas y seis en San Bosco. De las especies recolectadas, el 7,41% es compartido entre Palo Seco y Damas; el 3,70% entre Palo Seco y San Bosco y el 22,22% entre Damas y San Bosco. El análisis de similitud determinó que las estaciones Damas y San Bosco comparten un 41,40% de las especies; mientras que Palo Seco solamente presento un 9,9% de especies comunes con el grupo Damas-San Bosco. La mayoría de las especies encontradas fueron de origen marino que utilizan estos dos esteros como área de crianza (42,59% y alimentación (40,74%; mientras que las de agua dulce, estuarinas y visitantes ocasionales están poco representadas. La mayor diversidad se encontró en San Bosco y se detectaron diferencias estadísticamente significativas en los valores de H' entre las estaciones. La mayor similitud de especies se presentó entre las estaciones Damas y San Bosco, lo que sugiere que estas áreas están bajo una mayor influencia de aguas continentales; lo que propicia que los peces estén más ampliamente distribuidos. Se deduce que la ictiofauna de los esteros estudiados es transitoria en los sitios de muestreo y que la misma se distribuye heterogéneamente.

  3. Miniaturized UHF, S-, and Ka-band RF MEMS Filters for Small Form Factor, High Performance EVA Radio, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — In Phase II of this SBIR, Harmonic Devices (HDI) proposes to develop miniaturized MEMS filters at UHF, S-band and Ka-band to address the requirements of NASA's...

  4. A Compact RFID Reader Antenna for UHF Near-Field and Far-Field Operations

    Directory of Open Access Journals (Sweden)

    Lai Xiao zheng

    2013-01-01

    Full Text Available A compact loop antenna is presented for mobile ultrahigh frequency (UHF radio frequency identification (RFID application. This antenna, printed on a 0.8 mm thick FR4 substrate with a small size of 31 mm × 31 mm, achieves good impedance bandwidth from 897 to 928 MHz, which covers USA RFID Band (902–928 MHz. The proposed loop configuration, with a split-ring resonator (SRR coupled inside it, demonstrates strong and uniform magnetic field distribution in the near-field antenna region. Its linearly polarized radiation pattern provides available far-field gain. Finally, the reading capabilities of antenna are up to 56 mm for near-field and 1.05 m for far-field UHF RFID operations, respectively.

  5. Investigating Feasibility of Multiple UHF Passive RFID Transmitters Using Backscatter Modulation Scheme in BCI Applications

    DEFF Research Database (Denmark)

    Al Ajrawi, Shams; Sarkar, Mahasweta; Mihovska, Albena

    Building a wireless body area network (WBAN) application including implantable transceivers placed inside the human brain to collect the data from the electrodes and transmit them wirelessly to a controller placed outside the brain on the scalp faced major challenges. The transmission...... using passive RFID as the implantable transmitters and letting them operate in the UHF range. Backscatter modulation has been used as a power transfer mechanism. Investigation on the feasibility and applicability of implantable UHF Passive RFID transmitters inside the brain is done for capturing multi......-channel ECoG signals when traversing through a phantom brain model as a transmission medium for the experiments at a high data transfer rate. Detailed analysis has been done on parameters such as Received Signal Strength Indication (RSSI), signal to noise ratio (SNR), Maximum number of electrodes, Path Loss...

  6. Characterization of inkjet-printing HF and UHF antennas for RFID applications

    Science.gov (United States)

    Tarapata, Grzegorz; Paczesny, Daniel; Kawecki, Krzysztof

    2013-10-01

    The aim of this work was to perform a set of RFID antennas on flexible plastic substrates designed for range of HF and UHF band. The samples was fabricated using inkjet printing technology and conductive material base on silver nanopartilces ink. Fabricated antennas have been characterized, and the results were compared with the parameters of antennas made with usage of classical PCB technology on FR4 laminate with copper metallization. The paper presents studies on the impact of elastic substrates and conductive materials on antennas electrical parameters, as well as the communication range of the resulting RFID tags. During the experiment two patterns of HF and three patterns of UHF antennas was examined and the antennas was realized on different types of substrates, such as PET, Kapton® and FR4.

  7. Calibration of ultra-high frequency (UHF) partial discharge sensors using FDTD method

    Science.gov (United States)

    Ishak, Asnor Mazuan; Ishak, Mohd Taufiq

    2018-02-01

    Ultra-high frequency (UHF) partial discharge sensors are widely used for conditioning monitoring and defect location in insulation system of high voltage equipment. Designing sensors for specific applications often requires an iterative process of manufacturing, testing and mechanical modifications. This paper demonstrates the use of finite-difference time-domain (FDTD) technique as a tool to predict the frequency response of UHF PD sensors. Using this approach, the design process can be simplified and parametric studies can be conducted in order to assess the influence of component dimensions and material properties on the sensor response. The modelling approach is validated using gigahertz transverse electromagnetic (GTEM) calibration system. The use of a transient excitation source is particularly suitable for modeling using FDTD, which is able to simulate the step response output voltage of the sensor from which the frequency response is obtained using the same post-processing applied to the physical measurement.

  8. Assessment of immunomodulating action of combined therapy with UHF-hyperthermia in children with osteogenic sarcoma

    International Nuclear Information System (INIS)

    Neprina, G.S.; Panteleeva, E.S.; Vatin, O.E.; Bizer, V.A.; Bojko, I.N.

    1989-01-01

    The paper is concerned with immunological evaluation of different stages of combined therapy with local UHF-hyperthermia in children with osteogenic sarcoma. Combined therapy (polychemo- and raditherapy) was shown to cause a decrease in the number of immunocompetent cells, to enhance dysbalance of immunoregulatory T-lymphocytes, to weaken T-lymphocyte function on PHA; immunosuppressive action of combined therapy did not depend on a tumor site. The incorporation of UHF-hyperthermia in the therapeutic scheme weakened the manifestations of secondary immunodeficiency, got back to normal structure of T-lymphocyte population. A favorable immunomodulating effect of hyperthermia was more frequently observed in patients with crural bone tumors. The effect of hyperthermia was revealed after direct influence of thermotherapy but it was absent in continuation of combined treatment

  9. UHF RFID tag implementation on cork substrate for wine bottle monitoring

    OpenAIRE

    Rima Martí, Sergi; Georgiadis, Apostolos

    2013-01-01

    Wine industry is starting to deploy RFID technology for production control, logistics or innovative marketing. However, identifying wine bottles is difficult due to the unfavorable material content for the operation of the antennas. The thesis consists on the implementation of a UHF RFID tag placed on cork substrate in order to provide a feasible way of identifying wine packaged bottle. The proposed RFID tag consists on a meandered line dipole antenna, designed to be conformed so that it can ...

  10. Un sistema RFID in banda UHF per l'autoprestito in Biblioteca

    OpenAIRE

    Ricci, Franco; Crisanti, Andrea

    2009-01-01

    Department of Physics and CASPUR have been starting, in the past 2 years, a collaborationin order to develop a new RFID (Radio Frequency IDentification) system for automaticlibrary loan procedures. These systems (generally known as self-checkequipments) uses radio signals in the UHF frequency range to interact with antennas(passive tags) used to identify books. Users identification is made through special cardswith an embedded tag. The entire loan process is completely managed by users throug...

  11. A signature correlation study of ground target VHF/UHF ISAR imagery

    Science.gov (United States)

    Gatesman, Andrew J.; Beaudoin, Christopher J.; Giles, Robert H.; Kersey, William T.; Waldman, Jerry; Carter, Steve; Nixon, William E.

    2003-09-01

    VV and HH-polarized radar signatures of several ground targets were acquired in the VHF/UHF band (171-342 MHz) by using 1/35th scale models and an indoor radar range operating from 6 to 12 GHz. Data were processed into medianized radar cross sections as well as focused, ISAR imagery. Measurement validation was confirmed by comparing the radar cross section of a test object with a method of moments radar cross section prediction code. The signatures of several vehicles from three vehicle classes (tanks, trunks, and TELs) were measured and a signature cross-correlation study was performed. The VHF/UHF band is currently being exploited for its foliage penetration ability, however, the coarse image resolution which results from the relatively long radar wavelengths suggests a more challenging target recognition problem. One of the study's goals was to determine the amount of unique signature content in VHF/UHF ISAR imagery of military ground vehicles. Open-field signatures are compared with each other as well as with simplified shapes of similar size. Signatures were also acquired on one vehicle in a variety of configurations to determine the impact of monitor target variations on the signature content at these frequencies.

  12. Minimal hidden sector models for CoGeNT/DAMA events

    International Nuclear Information System (INIS)

    Cline, James M.; Frey, Andrew R.

    2011-01-01

    Motivated by recent attempts to reconcile hints of direct dark matter detection by the CoGeNT and DAMA experiments, we construct simple particle physics models that can accommodate the constraints. We point out challenges for building reasonable models and identify the most promising scenarios for getting isospin violation and inelasticity, as indicated by some phenomenological studies. If inelastic scattering is demanded, we need two new light gauge bosons, one of which kinetically mixes with the standard model hypercharge and has mass <2 GeV, and another which couples to baryon number and has mass 6.8±(0.1/0.2) GeV. Their interference gives the desired amount of isospin violation. The dark matter is nearly Dirac, but with small Majorana masses induced by spontaneous symmetry breaking, so that the gauge boson couplings become exactly off-diagonal in the mass basis, and the small mass splitting needed for inelasticity is simultaneously produced. If only elastic scattering is demanded, then an alternative model, with interference between the kinetically mixed gauge boson and a hidden sector scalar Higgs, is adequate to give the required isospin violation. In both cases, the light kinetically mixed gauge boson is in the range of interest for currently running fixed target experiments.

  13. El caso de la Dama de Elche: más que una divergencia

    Directory of Open Access Journals (Sweden)

    Olmos, Ricardo

    1996-12-01

    Full Text Available A recent review of Karen D. Vitelli appeared in American Journal of Archaeology (1995, 775 on John F. Moffitt's Art Forgery. The case of the Lady of Elche, is the reason that make us to write this paper. It is discussed here both method and content of a book showing a scientific intention but inaceptable conclusions. The Lady of Elche deserves a better approach from the light of the new Iberian archaeological research.Una reciente recensión de Karen D. Vitelli aparecida en American Journal of Archaeology (1995, 775 sobre el libro de John F. Moffitt Art Forgery. The case of the Lady of Elche, es el motivo de nuestro escrito. Se discute aquí el método y contenido de un libro con intención científica y conclusiones inaceptables. La Dama de Elche merece una mejor aproximación desde la luz de la nueva investigación de la arqueología ibérica.

  14. A FD/DAMA network architecture for the first generation land mobile satellite services

    Science.gov (United States)

    Yan, T.-Y.; Wang, C.; Cheng, U.; Dessouky, K.; Rafferty, W.

    1989-01-01

    A frequency division/demand assigned multiple access (FD/DAMA) network architecture for the first-generation land mobile satellite services is presented. Rationales and technical approaches are described. In this architecture, each mobile subscriber must follow a channel access protocol to make a service request to the network management center before transmission for either open-end or closed-end services. Open-end service requests will be processed on a blocked call cleared basis, while closed-end requests will be processed on a first-come-first-served basis. Two channel access protocols are investigated, namely, a recently proposed multiple channel collision resolution scheme which provides a significantly higher useful throughput, and the traditional slotted Aloha scheme. The number of channels allocated for either open-end or closed-end services can be adaptively changed according to aggregated traffic requests. Both theoretical and simulation results are presented. Theoretical results have been verified by simulation on the JPL network testbed.

  15. Small Business Innovation Research (SBIR) Program, FY 1994. Program Solicitation 94.1, Closing Date: 14 January 1994

    Science.gov (United States)

    1994-01-01

    owned business, at least 51 % of its voting stock is owned 2.5 Funding Agreement by United States citizens or lawfully admitted permanent resident aliens ...Follow-On ( UFO ) satellites and existing Navy UHF SATCOM Terminal equipment. Phase If: Develop, test and operationally demonstrate a UHF SATCOM modem which

  16. Methodes d'amas quantiques a temperature finie appliquees au modele de Hubbard

    Science.gov (United States)

    Plouffe, Dany

    Depuis leur decouverte dans les annees 80, les supraconducteurs a haute temperature critique ont suscite beaucoup d'interet en physique du solide. Comprendre l'origine des phases observees dans ces materiaux, telle la supraconductivite, est l'un des grands defis de la physique theorique du solide des 25 dernieres annees. L'un des mecanismes pressentis pour expliquer ces phenomenes est la forte interaction electron-electron. Le modele de Hubbard est l'un des modeles les plus simples pour tenir compte de ces interactions. Malgre la simplicite apparente de ce modele, certaines de ses caracteristiques, dont son diagramme de phase, ne sont toujours pas bien etablies, et ce malgre plusieurs avancements theoriques dans les dernieres annees. Cette etude se consacre a faire une analyse de methodes numeriques permettant de calculer diverses proprietes du modele de Hubbard en fonction de la temperature. Nous decrivons des methodes (la VCA et la CPT) qui permettent de calculer approximativement la fonction de Green a temperature finie sur un systeme infini a partir de la fonction de Green calculee sur un amas de taille finie. Pour calculer ces fonctions de Green, nous allons utiliser des methodes permettant de reduire considerablement les efforts numeriques necessaires pour les calculs des moyennes thermodynamiques, en reduisant considerablement l'espace des etats a considerer dans ces moyennes. Bien que cette etude vise d'abord a developper des methodes d'amas pour resoudre le modele de Hubbard a temperature finie de facon generale ainsi qu'a etudier les proprietes de base de ce modele, nous allons l'appliquer a des conditions qui s'approchent de supraconducteurs a haute temperature critique. Les methodes presentees dans cette etude permettent de tracer un diagramme de phase pour l'antiferromagnetisme et la supraconductivite qui presentent plusieurs similarites avec celui des supraconducteurs a haute temperature. Mots-cles : modele de Hubbard, thermodynamique

  17. Partial Discharge Spectral Characterization in HF, VHF and UHF Bands Using Particle Swarm Optimization.

    Science.gov (United States)

    Robles, Guillermo; Fresno, José Manuel; Martínez-Tarifa, Juan Manuel; Ardila-Rey, Jorge Alfredo; Parrado-Hernández, Emilio

    2018-03-01

    The measurement of partial discharge (PD) signals in the radio frequency (RF) range has gained popularity among utilities and specialized monitoring companies in recent years. Unfortunately, in most of the occasions the data are hidden by noise and coupled interferences that hinder their interpretation and renders them useless especially in acquisition systems in the ultra high frequency (UHF) band where the signals of interest are weak. This paper is focused on a method that uses a selective spectral signal characterization to feature each signal, type of partial discharge or interferences/noise, with the power contained in the most representative frequency bands. The technique can be considered as a dimensionality reduction problem where all the energy information contained in the frequency components is condensed in a reduced number of UHF or high frequency (HF) and very high frequency (VHF) bands. In general, dimensionality reduction methods make the interpretation of results a difficult task because the inherent physical nature of the signal is lost in the process. The proposed selective spectral characterization is a preprocessing tool that facilitates further main processing. The starting point is a clustering of signals that could form the core of a PD monitoring system. Therefore, the dimensionality reduction technique should discover the best frequency bands to enhance the affinity between signals in the same cluster and the differences between signals in different clusters. This is done maximizing the minimum Mahalanobis distance between clusters using particle swarm optimization (PSO). The tool is tested with three sets of experimental signals to demonstrate its capabilities in separating noise and PDs with low signal-to-noise ratio and separating different types of partial discharges measured in the UHF and HF/VHF bands.

  18. Authenticity control of game meat products--a single method to detect and quantify adulteration of fallow deer (Dama dama), red deer (Cervus elaphus) and sika deer (Cervus nippon) by real-time PCR.

    Science.gov (United States)

    Druml, Barbara; Grandits, Stephanie; Mayer, Walter; Hochegger, Rupert; Cichna-Markl, Margit

    2015-03-01

    This contribution presents a single real-time PCR assay allowing the determination of the deer content (the sum of fallow deer (Dama dama), red deer (Cervus elaphus) and sika deer (Cervus nippon)) in meat products to detect food adulteration. The PCR assay does not show cross-reactivity with 20 animal species and 43 botanical species potentially contained in game meat products. The limit of quantification is 0.5% for fallow deer and red deer and 0.1% for sika deer. The deer content in meat products is determined by relating the concentration obtained with the deer PCR assay to that obtained with a reference system which amplifies mammals and poultry DNA. The analysis of binary meat mixtures with pork, a meat mixture containing equal amounts of fallow deer, red deer and sika deer in pork and a model game sausage showed that the quantification approach is very accurate (systematic error generally <25%). Copyright © 2014 Elsevier Ltd. All rights reserved.

  19. Effects of wind turbines on UHF television reception: field tests in Denmark

    International Nuclear Information System (INIS)

    Sorenson, B.

    1992-01-01

    As a result of a planning application for a windfarm comprising 20 wind turbines at Tynewydd Farm, Gilfach Goch in Mid Glamorgan, a report discussing any detrimental effects the proposal might have on u.h.f. television reception was produced. In order to make the report as definitive as possible, it was decided to carry out field tests on the exact model of wind turbine to be used at Tynewydd. This required a field trip to Denmark, and the opportunity was taken to make measurements on two other models of turbine at the same time. This report presents the analysis of the results for all three turbines. (author)

  20. Letter to the Editor UHF electromagnetic emission stimulated by HF pumping of the ionosphere

    Directory of Open Access Journals (Sweden)

    S. M. Grach

    2002-10-01

    Full Text Available UHF electromagnetic emission (with a frequency near 600 MHz from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth thermal noise emission off the plasma density irregularities, bremsstrahlung and excitation of high Rydberg states of the neutral particles by the accelerated electrons are discussed.Key words. Ionosphere (active experiments; wave-particle interactions – Solar physics, astrophysics, and astronomy (radio emissions

  1. Letter to the Editor UHF electromagnetic emission stimulated by HF pumping of the ionosphere

    Directory of Open Access Journals (Sweden)

    E. N. Sergeev

    Full Text Available UHF electromagnetic emission (with a frequency near 600 MHz from the F-region of the ionosphere pumped by an HF powerful radio wave is revealed. Possible mechanisms of the emission excitation, such as plasma mode con-version, scattering or Earth thermal noise emission off the plasma density irregularities, bremsstrahlung and excitation of high Rydberg states of the neutral particles by the accelerated electrons are discussed.Key words. Ionosphere (active experiments; wave-particle interactions – Solar physics, astrophysics, and astronomy (radio emissions

  2. Investigating Feasibility Of Multiple UHF Passive RFID Transmitters Using Backscatter Modulation Scheme In BCI Applications

    DEFF Research Database (Denmark)

    Al Ajrawi, Shams; Sarkar, Mahasweta; Rao, Ramesh

    simulatedbrain matter to a receiver located on the surface of a simulatedskull. These analyses are essential for building a brain computerinterface application. We showcase theoretical and experimentalresults based on a phantom model of the human brain usingpassive RFID as the implantable transmitter operating...... in UHFrange. Furthermore, we use backscatter modulation as a powertransfer mechanism. Investigation on the feasibility and appli-cability of implantable UHF Passive RFID transmitters insidethe brain is done for capturing multi-channel ECoG signals at ahigh data transfer rate. Detailed analysis have been done...

  3. A Novel Technology for Motion Capture Using Passive UHF RFID Tags

    DEFF Research Database (Denmark)

    Krigslund, Rasmus; Popovski, Petar; Pedersen, Gert Frølund

    2013-01-01

    Although there are several existing methods for human motion capture, they all have important limitations and hence there is the need to explore fundamentally new approaches. Here we present a method based on a Radio Frequency IDentification (RFID) system with passive Ultra High Frequency (UHF...... walking. The reference joint angles for the validation were obtained by an optoelectronic system. Although the method is in its initial phase of development, the results of the validation are promising and show that the movement information can be extracted from the RFID response signals....

  4. Investigation of particle reduction and its transport mechanism in UHF-ECR dielectric etching system

    International Nuclear Information System (INIS)

    Kobayashi, Hiroyuki; Yokogawa, Ken'etsu; Maeda, Kenji; Izawa, Masaru

    2008-01-01

    Control of particle transport was investigated by using a UHF-ECR etching apparatus with a laser particle monitor. The particles, which float at a plasma-sheath boundary, fall on a wafer when the plasma is turned off. These floating particles can be removed from the region above the wafer by changing the plasma distribution. We measured the distribution of the rotational temperature of nitrogen molecules across the wafer to investigate the effect of the thermophoretic force. We found that mechanisms of particle transport in directions parallel to the wafer surface can be explained by the balance between thermophoretic and gas viscous forces

  5. Effects of wind turbines on UHF television reception: field tests in Denmark, November 1991

    International Nuclear Information System (INIS)

    Wright, D.T.

    1992-01-01

    As a result of a planning application for a wind farm comprising 20 wind turbines at Tynewydd Farm, Gilfach Goch in Mid Glamorgan, it became necessary to produce a Report discussing any detrimental effects the proposal might have on UHF television reception. In order to make that Report as definitive as possible, it was decided to carry out field tests on the exact model of wind turbine to be used to Tynewydd. This required a field trip to Denmark, and the opportunity was taken to make measurements on two other models of turbine at the same time. This Report presents the analysis of the results for all three turbines. (Author)

  6. Towards Washable Electrotextile UHF RFID Tags: Reliability Study of Epoxy-Coated Copper Fabric Antennas

    Directory of Open Access Journals (Sweden)

    Shiqi Wang

    2015-01-01

    Full Text Available We investigate the impact of washing on the performance of passive UHF RFID tags based on dipole antennas fabricated from copper fabric and coated with protective epoxy coating. Initially, the tags achieved read ranges of about 8 meters, under the European RFID emission regulation. To assess the impact of washing on the performance of the tags, they were washed repeatedly in a washing machine and measured after every washing cycle. Despite the reliability challenges related to mechanical stress, the used epoxy coating was found to be a promising coating for electrotextile tags in moist conditions.

  7. The Process of Parents' Decision-Making to Discharge Their Child against Medical Advice (DAMA: A grounded theory study

    Directory of Open Access Journals (Sweden)

    Nikbakht Nasrabadi Alireza

    2016-05-01

    Full Text Available Discharge against medical advice (DAMA refers to the phenomenon that patient or the patient’s surrogate decides to leave the hospital before the attending physician confirms the patient is discharged. Children are much more vulnerable to such discharges. This process occurs with different mechanisms that identifying them can be helpful in reducing this phenomenon. We aimed to explore the process of parents' decision-making to discharge their child against medical advice. In-depth, semi-structured interviews were conducted with 10 fathers, 10 mothers, 6 nurses and 3 physician assistants and the data were collected to the point of saturation. Grounded theory methodology was adopted for data collection and analysis. The results of qualitative analysis in the field of the parents' decisionmaking on the DAMA revealed 4 main themes: "lack of family-centered care", "disruption of the parenting process", "distrust to the medical team and center" and "psychological strategy of shirk responsibility for child care and treatment ". By providing family-centered care, adopting measures to empowering the families, developing the trust of parents to the health care team and developing a discharge plan from the beginning of children hospitalization with the cooperation of health care team and parents and considering all factors such as child's special health condition and parent's health related perceptions and beliefs, children will not be discharged against medical advice and will experience better outcomes.

  8. SAR exposure from UHF RFID reader in adult, child, pregnant woman, and fetus anatomical models.

    Science.gov (United States)

    Fiocchi, Serena; Markakis, Ioannis A; Ravazzani, Paolo; Samaras, Theodoros

    2013-09-01

    The spread of radio frequency identification (RFID) devices in ubiquitous applications without their simultaneous exposure assessment could give rise to public concerns about their potential adverse health effects. Among the various RFID system categories, the ultra high frequency (UHF) RFID systems have recently started to be widely used in many applications. This study addresses a computational exposure assessment of the electromagnetic radiation generated by a realistic UHF RFID reader, quantifying the exposure levels in different exposure scenarios and subjects (two adults, four children, and two anatomical models of women 7 and 9 months pregnant). The results of the computations are presented in terms of the whole-body and peak spatial specific absorption rate (SAR) averaged over 10 g of tissue to allow comparison with the basic restrictions of the exposure guidelines. The SAR levels in the adults and children were below 0.02 and 0.8 W/kg in whole-body SAR and maximum peak SAR levels, respectively, for all tested positions of the antenna. On the contrary, exposure of pregnant women and fetuses resulted in maximum peak SAR(10 g) values close to the values suggested by the guidelines (2 W/kg) in some of the exposure scenarios with the antenna positioned in front of the abdomen and with a 100% duty cycle and 1 W radiated power. Copyright © 2013 Wiley Periodicals, Inc.

  9. Performance and Benchmarking of Multisurface UHF RFID Tags for Readability and Reliability

    Directory of Open Access Journals (Sweden)

    Joshua Bolton

    2017-01-01

    Full Text Available As the price of passive radio frequency identification (RFID tags continues to decrease, more and more companies are considering item-level tagging. Although the use of RFID is simple, its proper application should be studied to achieve maximum efficiency and utilization in the industry. This paper is intended to demonstrate the test results of various multisurface UHF tags from different manufacturers for their readability under varying conditions such as orientation of tags with respect to reader, distance of tag from the reader, and materials used for embedding tags. These conditions could affect the reliability of RFID systems used for varied applications. In this paper, we implement a Design for Six Sigma Research (DFSS-R methodology that allows for reliability testing of RFID systems. In this paper, we have showcased our results about the benchmarking of UHF RFID tags and have put forward an important observation about the blind spots observed at different distances and orientations along different surfaces, which is primarily due to the polarity of the antenna chosen.

  10. VHF/UHF radar observations of tropical mesoscale convective systems over southern India

    Directory of Open Access Journals (Sweden)

    K. Kishore Kumar

    2005-07-01

    Full Text Available Several campaigns have been carried out to study the convective systems over Gadanki (13.5° N, 79.2° E, a tropical station in India, using VHF and UHF radars. The height-time sections of several convective systems are investigated in detail to study reflectivity, turbulence and vertical velocity structure. Structure and dynamics of the convective systems are the main objectives of these campaigns. The observed systems are classified into single- and multi-cell systems. It has been observed that most of the convective systems at this latitude are multi-cellular in nature. Simultaneous VHF and UHF radar observations are used to classify the observed precipitating systems as convective, intermediary and stratiform regions. Composite height profiles of vertical velocities in these regions were obtained and the same were compared with the profiles obtained at other geographical locations. These composite profiles of vertical velocity in the convective regions have shown their peaks in the mid troposphere, indicating that the maximum latent heat is being released at those heights. These profiles are very important for numerical simulations of the convective systems, which vary significantly from one geographical location to the other.

    Keywords. Meteorology and atmospheric dynamics (Mesoscale meteorology; Convective processes – Radio science (Remote sensing

  11. VHF/UHF radar observations of tropical mesoscale convective systems over southern India

    Directory of Open Access Journals (Sweden)

    K. Kishore Kumar

    2005-07-01

    Full Text Available Several campaigns have been carried out to study the convective systems over Gadanki (13.5° N, 79.2° E, a tropical station in India, using VHF and UHF radars. The height-time sections of several convective systems are investigated in detail to study reflectivity, turbulence and vertical velocity structure. Structure and dynamics of the convective systems are the main objectives of these campaigns. The observed systems are classified into single- and multi-cell systems. It has been observed that most of the convective systems at this latitude are multi-cellular in nature. Simultaneous VHF and UHF radar observations are used to classify the observed precipitating systems as convective, intermediary and stratiform regions. Composite height profiles of vertical velocities in these regions were obtained and the same were compared with the profiles obtained at other geographical locations. These composite profiles of vertical velocity in the convective regions have shown their peaks in the mid troposphere, indicating that the maximum latent heat is being released at those heights. These profiles are very important for numerical simulations of the convective systems, which vary significantly from one geographical location to the other. Keywords. Meteorology and atmospheric dynamics (Mesoscale meteorology; Convective processes – Radio science (Remote sensing

  12. VHF/UHF imagery and RCS measurements of ground targets in forested terrain

    Science.gov (United States)

    Gatesman, Andrew J.; Beaudoin, Christopher J.; Giles, Robert H.; Waldman, Jerry; Nixon, William E.

    2002-08-01

    The monostatic VV and HH-polarized radar signatures of several targets and trees have been measured at foliage penetration frequencies (VHF/UHF) by using 1/35th scale models and an indoor radar range operating at X-band. An array of high-fidelity scale model ground vehicles and test objects as well as scaled ground terrain and trees have been fabricated for the study. Radar measurement accuracy has been confirmed by comparing the signature of a test object with a method of moments radar cross section prediction code. In addition to acquiring signatures of targets located on a smooth, dielectric ground plane, data have also been acquired with targets located in simulated wooded terrain that included scaled tree trunks and tree branches. In order to assure the correct backscattering behavior, all dielectric properties of live tree wood and moist soil were scaled properly to match the complex dielectric constant of the full-scale materials. The impact of the surrounding tree clutter on the VHF/UHF radar signatures of ground vehicles was accessed. Data were processed into high-resolution, polar-formatted ISAR imagery and signature comparisons are made between targets in open-field and forested scenarios.

  13. Production objectives, trait and breed preferences of farmers keeping N'Dama, Fulani Zebu and crossbred cattle and implications for breeding programs.

    Science.gov (United States)

    Traoré, S A; Markemann, A; Reiber, C; Piepho, H P; Valle Zárate, A

    2017-04-01

    Many local livestock breeds in developing countries are being replaced by exotic breeds, leading to a loss of genetic resources. In southern Mali, for the past two decades, a trend towards increasing crossbreeding between the trypanotolerant N'Dama cattle and the trypano-susceptible Fulani Zebu cattle has been taking place. A survey with 160 farmers owning a cattle herd was carried out in southern Mali to investigate their production objectives, as well as trait and breed preferences and correlated socio-economic determinants in order to understand farmers' breeding decisions and to identify comparative advantages of three breed groups (N'Dama, Fulani Zebu and crossbreds) raised in the study area. Data were analyzed using an exploded logit model. The reasons for raising cattle, as well as trait and breed preferences reflected the multiple objectives of the farmers. Draught power and savings were the most important production objectives. Productive traits were ranked highest; farmers reported large body size as the most preferred trait, followed by fertility, draught ability and milk yield. Crossbreds were the favored breed group. Breed preferences were mainly explained by 'resistance to disease' for N'Dama cattle and 'high market price' for Fulani Zebu and crossbred cattle. Production objectives, trait and breed preferences were mainly influenced by farmer group (local farmers and settled transhumants). Local farmers put comparatively more emphasis on livestock functions linked to crop production such as draught power. They had a higher preference for traction ability as a selection trait and preferred N'Dama over Fulani Zebu cattle. Settled transhumants emphasized milk yield as a selection trait and preferred Fulani Zebu over N'Dama. The results indicate that the trend towards more crossbreeding will continue putting the N'Dama breed under high risk of genetic dilution in southern Mali. The N'Dama cattle remain a valuable breed due to their adaptive traits such as

  14. Study of the frequency modulation of various U.H.F. signals occurring in a linear electron accelerator; Etude de la modulation de frequence de divers signaux U.H.F. existant dans un accelerateur lineaire d'electrons

    Energy Technology Data Exchange (ETDEWEB)

    Bergere, R; Veyssiere, A; Daujat, P [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1966-06-01

    This paper contains a digest of a series of studies on the frequency modulation of U.H.F. fields and signals associated with the linear electron accelerator at Saclay. We first consider the frequency modulation of a U. H. F. pulse before its injection into an accelerating structure and after its subsequent propagation when no accelerated electrons are present. We then apply a similar analysis to the frequency modulation due to the direct interaction of the electron beam itself, and the accelerating U.H.F. fields. Finally we consider the phase modulation of the elementary electron packet itself. This phase modulation can be correctly interpreted by considering the dynamics of the electron beam as such. This analysis moreover, gives a correct interpretation of the evolution of the phase modulation with time, as the elementary electron packets move along with the sinusoidal U.H.F. accelerating fields. (authors) [French] Cet article resume les etudes faites sur l'accelerateur lineaire d'electrons de Saclay a propos de la modulation de frequence des divers signaux U.H.F. presents autour de l'accelerateur. On etudie d'abord la modulation de frequence des impulsions U.H.F. entrant sur la structure acceleratrice ou transmises par cette structure en l'absence de faisceau d'electrons acceleres. On analyse ensuite la modulation de frequence resultant de l'interaction d'une de ces ondes avec le faisceau d'electrons acceleres. On etudie enfin, la modulation de phase des divers paquets elementaires constituant une impulsion d'electrons acceleres. On montre comment cette modulation de phase peut s'expliquer par des considerations sur la dynamique du faisceau et conduire a une representation dans les divers cas possibles de l'evolution de la phase d'accrochage des electrons sur l'onde sinusoidale progressive de champ accelerateur. (auteurs)

  15. Recent applications of UHF-MRI in the study of human brain function and structure : a review

    NARCIS (Netherlands)

    Van der Zwaag, W.; Schäfer, Andreas; Marques, José P; Turner, R.; Trampel, Robert

    The increased availability of ultra-high-field (UHF) MRI has led to its application in a wide range of neuroimaging studies, which are showing promise in transforming fundamental approaches to human neuroscience. This review presents recent work on structural and functional brain imaging, at 7 T and

  16. Design of a passive UHF RFID tag for the ISO18000-6C protocol

    International Nuclear Information System (INIS)

    Wang Yao; Wen Guangjun; Mao Wei; He Yanli; Zhu Xueyong

    2011-01-01

    This paper presents a new fully integrated wide-range UHF passive RFID tag chip design that is compatible with the ISO18000-6C protocol. In order to reduce the die area, an ultra-low power CMOS voltage regulator without resistors and an area-efficient amplitude shift keying demodulator with a novel adaptive average generator are both adopted. A low power clock generator is designed to guarantee the accuracy of the clock under ±4%. As the clock gating technology is employed to reduce the power consumption of the baseband processor, the total power consumption of the tag is about 14 μW with a sensitivity of -9.5 dBm. The detection distance can reach about 5 m under 4 W effective isotropic radiated power. The whole tag is fabricated in TSMC 0.18 μm CMOS technology and the chip size is 880 x 880 μm 2 . (semiconductor integrated circuits)

  17. CPW-Fed Wideband Circular Polarized Antenna for UHF RFID Applications

    Directory of Open Access Journals (Sweden)

    Sun-Woong Kim

    2017-01-01

    Full Text Available We propose a wide bandwidth antenna with a circular polarization for universal Ultra High Frequency (UHF radio-frequency identification (RFID reader applications. To achieve a wide 3 dB axial ratio (AR bandwidth, three T-shaped microstrip lines are inserted into the ground plane. The measured impedance bandwidth of the proposed antenna is 480 MHz and extends from 660 to 1080 MHz, and the 3 dB AR bandwidth is 350 MHz and extends from 800 to 1155 MHz. The radiation pattern is a bidirectional pattern with a maximum antenna gain of 3.67 dBi. The overall size of the proposed antenna is 114 × 114 × 0.8 mm3.

  18. Passive UHF RFID Tags with Specific Printed Antennas for Dielectric and Metallic Objects Applications

    Directory of Open Access Journals (Sweden)

    K. Siakavara

    2017-09-01

    Full Text Available Design process and respective results for the synthesis of specific Radiofrequency Identification(RFID tag antennas, suitable for dielectric and metallic objects, are presented. The antennas were designed for the UHF(865MHz-869MHz band and their basic configuration is that of the printed spiral type. Six modification steps to the classical spiral layout are proposed and it was proved that they can lead to tags with high readability and reading distances up to 10m when designed for dielectric object and up to 7m in the case of metallic objects. The results of the measurements of the fabricated tags are explained via theoretical evaluations which take into account reflection phenomena, that are present in a real environment at which the tags are used.

  19. Experimental Study on Strain Reliability of Embroidered Passive UHF RFID Textile Tag Antennas and Interconnections

    Directory of Open Access Journals (Sweden)

    Xiaochen Chen

    2017-01-01

    Full Text Available We present embroidered antennas and interconnections in passive UHF RFID textile tags and test their strain reliability. Firstly, we fabricate tag antennas on two different stretchable fabric substrates by five different embroidery patterns and choose the most stretchable ones for testing. Next, the tag ICs are attached by sewing and gluing, and the tag reliability during repeated stretching cycles is evaluated through wireless measurements. Initially, the chosen tags achieve read ranges of 6–8 meters and can strain up to 140–150% of their original length. After 100 stretching cycles to 80% of their maximum strain, the read ranges of the tags with glued interconnections are similar to the initial values. In addition, also the read ranges of the tags with sewed interconnections are still more than 70%–85% of their initial values. However, some challenges with the reproducibility need to be solved next.

  20. Design of a passive UHF RFID tag for the ISO18000-6C protocol

    Energy Technology Data Exchange (ETDEWEB)

    Wang Yao; Wen Guangjun; Mao Wei; He Yanli; Zhu Xueyong, E-mail: wangyao220597@yahoo.com.cn [RFIC Laboratory CICS, School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731 (China)

    2011-05-15

    This paper presents a new fully integrated wide-range UHF passive RFID tag chip design that is compatible with the ISO18000-6C protocol. In order to reduce the die area, an ultra-low power CMOS voltage regulator without resistors and an area-efficient amplitude shift keying demodulator with a novel adaptive average generator are both adopted. A low power clock generator is designed to guarantee the accuracy of the clock under {+-}4%. As the clock gating technology is employed to reduce the power consumption of the baseband processor, the total power consumption of the tag is about 14 {mu}W with a sensitivity of -9.5 dBm. The detection distance can reach about 5 m under 4 W effective isotropic radiated power. The whole tag is fabricated in TSMC 0.18 {mu}m CMOS technology and the chip size is 880 x 880 {mu}m{sup 2}. (semiconductor integrated circuits)

  1. Low-cost low-power UHF RFID tag with on-chip antenna

    Energy Technology Data Exchange (ETDEWEB)

    Xi Jingtian; Yan Na; Che Wenyi; Xu Conghui; Wang Xiao; Yang Yuqing; Jian Hongyan; Min Hao, E-mail: jtxi@fudan.edu.c [State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203 (China)

    2009-07-15

    This paper presents an EPC Class 1 Generation 2 compatible tag with on-chip antenna implemented in the SMIC 0.18 {mu}m standard CMOS process. The UHF tag chip includes an RF/analog front-end, a digital baseband, and a 640-bit EEPROM memory. The on-chip antenna is optimized based on a novel parasitic-aware model. The rectifier is optimized to achieve a power conversion efficiency up to 40% by applying a self-bias feedback and threshold compensation techniques. A good match between the tag circuits and the on-chip antenna is realized by adjusting the rectifier input impedance. Measurements show that the presented tag can achieve a communication range of 1 cm with 1 W reader output power using a 1 x 1 cm{sup 2} single-turn loop reader antenna.

  2. Design of an ultra-low-power digital processor for passive UHF RFID tags

    Energy Technology Data Exchange (ETDEWEB)

    Shi Wanggen; Zhuang Yiqi; Li Xiaoming; Wang Xianghua; Jin Zhao; Wang Dan, E-mail: wanggen_shi@163.co [Key Laboratory of the Ministry of Education for Wide Band-Gap Semiconductor Materials and Devices, Institute of Microelectronics, Xidian University, Xi' an 710071 (China)

    2009-04-15

    A new architecture of digital processors for passive UHF radio-frequency identification tags is proposed. This architecture is based on ISO/IEC 18000-6C and targeted at ultra-low power consumption. By applying methods like system-level power management, global clock gating and low voltage implementation, the total power of the design is reduced to a few microwatts. In addition, an innovative way for the design of a true RNG is presented, which contributes to both low power and secure data transaction. The digital processor is verified by an integrated FPGA platform and implemented by the Synopsys design kit for ASIC flows. The design fits different CMOS technologies and has been taped out using the 2P4M 0.35 mum process of Chartered Semiconductor.

  3. A passive UHF RFID tag with a dynamic-Vth-cancellation rectifier

    International Nuclear Information System (INIS)

    Shen Jinpeng; Wang Bo; Liu Shan; Wang Xin'an; Ruan Zhengkun; Li Shoucheng

    2013-01-01

    This paper presents a passive UHF RFID tag with a dynamic-V th -cancellation (DVC) rectifier. In the rectifier, the threshold voltages of MOSFETs are cancelled by applying gate bias voltages, which are dynamically changed according to the states of the MOSFETs. The DVC rectifier enables both low ON-resistance and small reverse leakage of the MOSFETs, resulting in high power conversion efficiency (PCE). An area-efficient demodulator with a novel average detector is also designed, which takes advantage of the rectifier's first stage as the envelope detector. The whole tag chip is implemented in a 0.18 μm CMOS process with a die size of 880 × 950 μm 2 . Measurement results show that the rectifier achieves a maximum PCE of 53.7% with 80 kΩ resistor load. (semiconductor integrated circuits)

  4. Extended post processing for simulation results of FEM synthesized UHF-RFID transponder antennas

    Directory of Open Access Journals (Sweden)

    R. Herschmann

    2007-06-01

    Full Text Available The computer aided design process of sophisticated UHF-RFID transponder antennas requires the application of reliable simulation software. This paper describes a Matlab implemented extension of the post processor capabilities of the commercially available three dimensional field simulation programme Ansoft HFSS to compute an accurate solution of the antenna's surface current distribution. The accuracy of the simulated surface currents, which are physically related to the impedance at the feeding point of the antenna, depends on the convergence of the electromagnetic fields inside the simulation volume. The introduced method estimates the overall quality of the simulation results by combining the surface currents with the electromagnetic fields extracted from the field solution of Ansoft HFSS.

  5. Design of an ultra-low-power digital processor for passive UHF RFID tags

    International Nuclear Information System (INIS)

    Shi Wanggen; Zhuang Yiqi; Li Xiaoming; Wang Xianghua; Jin Zhao; Wang Dan

    2009-01-01

    A new architecture of digital processors for passive UHF radio-frequency identification tags is proposed. This architecture is based on ISO/IEC 18000-6C and targeted at ultra-low power consumption. By applying methods like system-level power management, global clock gating and low voltage implementation, the total power of the design is reduced to a few microwatts. In addition, an innovative way for the design of a true RNG is presented, which contributes to both low power and secure data transaction. The digital processor is verified by an integrated FPGA platform and implemented by the Synopsys design kit for ASIC flows. The design fits different CMOS technologies and has been taped out using the 2P4M 0.35 μm process of Chartered Semiconductor.

  6. Wide-Range Adaptive RF-to-DC Power Converter for UHF RFIDs

    KAUST Repository

    Ouda, Mahmoud H.

    2016-07-27

    A wide-range, differential, cross-coupled rectifier is proposed with an extended dynamic range of input RF power that enables wireless powering from varying distances. The proposed architecture mitigates the reverse-leakage problem in conven- tional, cross-coupled rectifiers without degrading sensitivity. A prototype is designed for UHF RFID applications, and is imple- mented using 0.18 μ m CMOS technology. On-chip measurements demonstrate a sensitivity of − 18 dBm for 1 V output over a 100 k Ω load and a peak RF-to-DC power conversion efficiency of 65%. A conventional, fully cross-coupled rectifier is fabricated along- side for comparison and the proposed rectifier shows more than 2 × increase in dynamic range and a 25% boosting in output voltage than the conventional rectifier

  7. Small Size and Low Cost UHF RFID Tag Antenna Mountable on Metallic Objects

    Directory of Open Access Journals (Sweden)

    Sergio López-Soriano

    2015-01-01

    Full Text Available Reducing tag size while maintaining good performance is one of the major challenges in radio-frequency identification applications (RFID, in particular when labeling metallic objects. In this contribution, a small size and low cost tag antenna for identifying metal objects in the European UHF band (865–868 MHz is presented. The antenna consists of a transmission line mounted on an inexpensive thin dielectric which is proximity-coupled to a short-ended patch mounted on FR4 substrate. The overall dimensions of the tag are 33.5 × 30 × 3.1 mm. Experimental results show that, for an EIRP of 3.2 W (European regulations, such a small and cheap tag attains read ranges of about 5 m when attached to a metallic object.

  8. Long range ultra-high frequency (UHF) radio frequency identification (RFID) antenna design

    Science.gov (United States)

    Reynolds, Nathan D.

    There is an ever-increasing demand for radio frequency identification (RFID) tags that are passive, long range, and mountable on multiple surfaces. Currently, RFID technology is utilized in numerous applications such as supply chain management, access control, and public transportation. With the combination of sensory systems in recent years, the applications of RFID technology have been extended beyond tracking and identifying. This extension includes applications such as environmental monitoring and healthcare applications. The available sensory systems usually operate in the medium or high frequency bands and have a low read range. However, the range limitations of these systems are being overcome by the development of RFID sensors focused on utilizing tags in the ultra-high frequency (UHF) band. Generally, RFID tags have to be mounted to the object that is being identified. Often the objects requiring identification are metallic. The inherent properties of metallic objects have substantial effects on nearby electromagnetic radiation; therefore, the operation of the tag antenna is affected when mounted on a metallic surface. This outlines one of the most challenging problems for RFID systems today: the optimization of tag antenna performance in a complex environment. In this research, a novel UHF RFID tag antenna, which has a low profile, long range, and is mountable on metallic surfaces, is designed analytically and simulated using a 3-D electromagnetic simulator, ANSYS HFSS. A microstrip patch antenna is selected as the antenna structure, as patch antennas are low profile and suitable for mounting on metallic surfaces. Matching and theoretical models of the microstrip patch antenna are investigated. Once matching and theory of a microstrip patch antenna is thoroughly understood, a unique design technique using electromagnetic band gap (EBG) structures is explored. This research shows that the utilization of an EBG structure in the patch antenna design yields

  9. Meteor head echo polarization at 930 MHz studied with the EISCAT UHF HPLA radar

    Directory of Open Access Journals (Sweden)

    G. Wannberg

    2011-06-01

    Full Text Available The polarization characteristics of 930-MHz meteor head echoes have been studied for the first time, using data obtained in a series of radar measurements carried out with the tristatic EISCAT UHF high power, large aperture (HPLA radar system in October 2009. An analysis of 44 tri-static head echo events shows that the polarization of the echo signal recorded by the Kiruna receiver often fluctuates strongly on time scales of tens of microseconds, illustrating that the scattering process is essentially stochastic. On longer timescales (> milliseconds, more than 90 % of the recorded events show an average polarization signature that is independent of meteor direction of arrival and echo strength and equal to that of an incoherent-scatter return from underdense plasma filling the tristatic observation volume. This shows that the head echo plasma targets scatter isotropically, which in turn implies that they are much smaller than the 33-cm wavelength and close to spherically symmetric, in very good agreement with results from a previous EISCAT UHF study of the head echo RCS/meteor angle-of-incidence relationship. Significant polarization is present in only three events with unique target trajectories. These all show a larger effective target cross section transverse to the trajectory than parallel to it. We propose that the observed polarization may be a signature of a transverse charge separation plasma resonance in the region immediately behind the meteor head, similar to the resonance effects previously discussed in connection with meteor trail echoes by Herlofson, Billam and Browne, Jones and Jones and others.

  10. Disordered redox metabolism of brain cells in rats exposed to low doses of ionizing radiation or UHF electromagnetic radiation.

    Science.gov (United States)

    Burlaka, A P; Druzhyna, M O; Vovk, A V; Lukin, S М

    2016-12-01

    To investigate the changes of redox-state of mammalian brain cells as the critical factor of initiation and formation of radiation damage of biological structures in setting of continuous exposure to low doses of ionizing radiation or fractionated ultra high frequency electromagnetic radiation (UHF EMR) at non-thermal levels. The influence of low-intensity ionizing radiation was studied on outbred female rats kept for 1.5 years in the Chernobyl accident zone. The effects of total EMR in the UHF band of non-thermal spectrum were investigated on Wistar rats. The rate of formation of superoxide radicals and the rate of NO synthesis in mitochondria were determined by the EPR. After exposure to ionizing or UHF radiation, the levels of ubisemiquinone in brain tissue of rats decreased by 3 and 1.8 times, respectively. The content of NO-FeS-protein complexes in both groups increased significantly (р < 0.05). In the conditions of ionizing or EMR the rates of superoxide radical generation in electron-transport chain of brain cell mitochondria increased by 1.5- and 2-fold, respectively (р < 0.05). In brain tissue of rats kept in the Chernobyl zone, significant increase of NO content was registered; similar effect was observed in rats treated with UHFR (р < 0.05). The detected changes in the electron transport chain of mitochondria of brain cells upon low-intensity irradiation or UHF EMR cause the metabolic reprogramming of cell mitochondria that increases the rate of superoxide radical generation and nitric oxide, which may initiate the development of neurodegenerative diseases and cancer. This article is part of a Special Issue entitled "The Chornobyl Nuclear Accident: Thirty Years After".

  11. Development of two U.H.F. band resonators for application to CO2 laser electro-optical modulation

    International Nuclear Information System (INIS)

    Egan, M.G.; Blanc, P.; Sexton, M.C.

    1980-01-01

    The purpose of this report is to describe the design and testing of two U.H.F. band resonators destined for use in the linear electro-optical modulator of the CO 2 Laser Rapid Interferometer diagnostic at present under development for the WEGA Tokamak. The resonators take the form of a re-entrant coaxial line cavity and an interdigital line filter, both of which possess the regions of high electric field necessary to activate the linear electro-optical effect

  12. Meteor head echo altitude distributions and the height cutoff effect studied with the EISCAT HPLA UHF and VHF radars

    Directory of Open Access Journals (Sweden)

    A. Westman

    2004-04-01

    Full Text Available Meteor head echo altitude distributions have been derived from data collected with the EISCAT VHF (224MHz and UHF (930MHz high-power, large-aperture (HPLA radars. At the high-altitude end, the distributions cut off abruptly in a manner reminiscent of the trail echo height ceiling effect observed with classical meteor radars. The target dimensions are shown to be much smaller than both the VHF and the UHF probing wavelengths, but the cutoff heights for the two systems are still clearly different, the VHF cutoff being located several km above the UHF one. A single-collision meteor-atmosphere interaction model is used to demonstrate that meteors in the (1.3–7.2µg mass range will ionise such that critical electron density at 224MHz is first reached at or around the VHF cutoff altitude and critical density at 930MHz will be reached at the UHF cutoff altitude. The observed seasonal variation in the cutoff altitudes is shown to be a function of the seasonal variation of atmospheric density with altitude. Assuming that the electron density required for detection is in the order of the critical density, the abrupt altitude cutoffs can be explained as a consequence of the micrometeoroid joint size-speed distribution dropping off so fast at the large-mass, high-velocity end that above a certain altitude the number of detectable events becomes vanishingly small. Conversely, meteors at the low-mass end of the distribution will be gradually retarded such that the ionisation they generate never reaches critical density. These particles will remain unobservable.Key words. Radio science (instruments and techniques – Interplatery physics (interplanetary dust – General or miscellaneous (new fields

  13. Disturbances in VHF/UHF telemetry links as a possible effect of the 2003 Hokkaido Tokachi-oki earthquake

    Directory of Open Access Journals (Sweden)

    H. Nagamoto

    2008-08-01

    Full Text Available The data on radio telemetry links (for water information at VHF/UHF in Hokkaido are used to investigate the rate of disturbances on radio links (or connection failure and its association with a huge earthquake, Tokachi-oki earthquake on 26 September 2003. Especially, the telemetry links at the Tokachi region closest to the earthquake epicenter, showed a significant increase in disturbances on radio links two weeks to a few days before the earthquake on the basis of analysis during a long interval from 1 June 2002 to 3 November 2007 (over 5 years. We suggest that these severe disturbances in VHF/UHF telemetry links are attributed to the generation of seismogenic VHF/UHF radio noises (emissions. Based on this idea, we have estimated that the intensity of these seismogenic emissions is on the order of 10–19 dB μV/m. Finally, the present result was compared with other physical parameters already obtained for this earthquake.

  14. Vertical velocity and turbulence aspects during Mistral events as observed by UHF wind profilers

    Directory of Open Access Journals (Sweden)

    J.-L. Caccia

    2004-11-01

    Full Text Available The general purpose of this paper is to experimentally study mesoscale dynamical aspects of the Mistral in the coastal area located at the exit of the Rhône-valley. The Mistral is a northerly low-level flow blowing in southern France along the Rhône-valley axis, located between the French Alps and the Massif Central, towards the Mediterranean Sea. The experimental data are obtained by UHF wind profilers deployed during two major field campaigns, MAP (Mesoscale Alpine Program in autumn 1999, and ESCOMPTE (Expérience sur Site pour COntraindre les Modèles de Pollution atmosphériques et de Transports d'Emission in summer 2001. Thanks to the use of the time evolution of the vertical profile of the horizontal wind vector, recent works have shown that the dynamics of the Mistral is highly dependent on the season because of the occurrence of specific synoptic patterns. In addition, during summer, thermal forcing leads to a combination of sea breeze with Mistral and weaker Mistral due to the enhanced friction while, during autumn, absence of convective turbulence leads to substantial acceleration as low-level jets are generated in the stably stratified planetary boundary layer. At the exit of the Rhône valley, the gap flow dynamics dominates, whereas at the lee of the Alps, the dynamics is driven by the relative contribution of "flow around" and "flow over" mechanisms, upstream of the Alps. This paper analyses vertical velocity and turbulence, i.e. turbulent dissipation rate, with data obtained by the same UHF wind profilers during the same Mistral events. In autumn, the motions are found to be globally and significantly subsident, which is coherent for a dry, cold and stable flow approaching the sea, and the turbulence is found to be of pure dynamical origin (wind shears and mountain/lee wave breaking, which is coherent with non-convective situations. In summer, due to the ground heating and to the interactions with thermal circulation, the

  15. Vertical velocity and turbulence aspects during Mistral events as observed by UHF wind profilers

    Science.gov (United States)

    Caccia, J.; Guénard, V.; Benech, B.; Campistron, B.; Drobinski, P.

    2004-11-01

    The general purpose of this paper is to experimentally study mesoscale dynamical aspects of the Mistral in the coastal area located at the exit of the Rhône-valley. The Mistral is a northerly low-level flow blowing in southern France along the Rhône-valley axis, located between the French Alps and the Massif Central, towards the Mediterranean Sea. The experimental data are obtained by UHF wind profilers deployed during two major field campaigns, MAP (Mesoscale Alpine Program) in autumn 1999, and ESCOMPTE (Expérience sur Site pour COntraindre les Modèles de Pollution atmosphériques et de Transports d'Emission) in summer 2001. Thanks to the use of the time evolution of the vertical profile of the horizontal wind vector, recent works have shown that the dynamics of the Mistral is highly dependent on the season because of the occurrence of specific synoptic patterns. In addition, during summer, thermal forcing leads to a combination of sea breeze with Mistral and weaker Mistral due to the enhanced friction while, during autumn, absence of convective turbulence leads to substantial acceleration as low-level jets are generated in the stably stratified planetary boundary layer. At the exit of the Rhône valley, the gap flow dynamics dominates, whereas at the lee of the Alps, the dynamics is driven by the relative contribution of "flow around" and "flow over" mechanisms, upstream of the Alps. This paper analyses vertical velocity and turbulence, i.e. turbulent dissipation rate, with data obtained by the same UHF wind profilers during the same Mistral events. In autumn, the motions are found to be globally and significantly subsident, which is coherent for a dry, cold and stable flow approaching the sea, and the turbulence is found to be of pure dynamical origin (wind shears and mountain/lee wave breaking), which is coherent with non-convective situations. In summer, due to the ground heating and to the interactions with thermal circulation, the vertical motions are

  16. Vertical velocity and turbulence aspects during Mistral events as observed by UHF wind profilers

    Energy Technology Data Exchange (ETDEWEB)

    Caccia, J.L.; Guenard, V. [LSEET, CNRS/Univ. de Toulon, La Garde (France); Benech, B.; Campistron, B. [CRA/LA, CNRS/Obs. Midi-Pyrenees, Campistrous (France); Drobinski, P. [IPSL/SA, CNRS/Univ. de Paris VI, Paris (France)

    2004-07-01

    The general purpose of this paper is to experimentally study mesoscale dynamical aspects of the Mistral in the coastal area located at the exit of the Rhone-valley. The Mistral is a northerly low-level flow blowing in southern France along the Rhone-valley axis, located between the French Alps and the Massif Central, towards the Mediterranean Sea. The experimental data are obtained by UHF wind profilers deployed during two major field campaigns, MAP (mesoscale alpine program) in autumn 1999, and ESCOMPTE (Experience sur Site pour COntraindre les Modeles de Pollution atmospheriques et de Transports d'Emission) in summer 2001. Thanks to the use of the time evolution of the vertical profile of the horizontal wind vector, recent works have shown that the dynamics of the Mistral is highly dependent on the season because of the occurrence of specific synoptic patterns. In addition, during summer, thermal forcing leads to a combination of sea breeze with Mistral and weaker Mistral due to the enhanced friction while, during autumn, absence of convective turbulence leads to substantial acceleration as low-level jets are generated in the stably stratified planetary boundary layer. At the exit of the Rhone valley, the gap flow dynamics dominates, whereas at the lee of the Alps, the dynamics is driven by the relative contribution of ''flow around'' and ''flow over'' mechanisms, upstream of the Alps. This paper analyses vertical velocity and turbulence, i.e. turbulent dissipation rate, with data obtained by the same UHF wind profilers during the same Mistral events. In autumn, the motions are found to be globally and significantly subsident, which is coherent for a dry, cold and stable flow approaching the sea, and the turbulence is found to be of pure dynamical origin (wind shears and mountain/lee wave breaking), which is coherent with non-convective situations. In summer, due to the ground heating and to the interactions with

  17. Enhancing the power output of the VA-955 UHF-TV klystron

    International Nuclear Information System (INIS)

    Bowen, O.N.; Lawson, J.Q.

    1977-01-01

    The Varian VA-955 UHF-TV klystron is rated at 50 kW CW, and four of these klystrons were used to provide 200 kW of RF power for lower hybrid heating experiments on the ATC machine at 800 MHz. These proven, production-type tubes were wanted to generate more power for larger type machines, such as the PDX. Varian was asked whether the tubes were capable of higher-power operation in pulsed applications. They replied that they had no experimental data but felt that the tubes were capable of greatly enhanced performance under pulsed conditions. By using cathode modulation instead of modulating anode control of the klystron, and thus limiting the time that high voltage is applied to the cathode, it was shown that the tube is capable of an output power of 200 kW for tens of milliseconds compared to its normal CW rating of 50 kW. A description is given of the experimental results, the required modifications to the klystron and output transmission circuit, the details of operation of the regulating modulator used to perform the experiment. Upgrade kits are now being fabricated to allow 200 kW operation of the two 50 kW units which were lent to General Atomic for Doublet II experiments

  18. A low cost integrated transceiver for mobile UHF passive RFID reader applications

    International Nuclear Information System (INIS)

    Wang Jingchao; Zhang Chun; Chi Baoyong; Wang Ziqiang; Li Fule; Wang Zhihua

    2009-01-01

    A low cost integrated transceiver for mobile UHF passive RFID reader applications is implemented in a 0.18-μm CMOS process. The transceiver contains an OOK modulator and a power amplifier in the transmitter chain, an IQ direct-down converter, variable-gain amplifiers, channel-select filters and a 10-bit ADC in the receiver chain. The measured output P 1DB power of the transmitter is 17.6 dBm and the measured receiver sensitivity is -70 dBm. The on-chip integer N synthesizer achieves a frequency resolution of 200 kHz with a phase noise of -104 dBc/Hz at 100 kHz frequency offset and -120.83 dBc/Hz at 1 MHz frequency offset. The transmitter, the receiver and the frequency synthesizer consume 201.34, 25.3 and 54 mW, respectively. The chip has a die area of 4 x 2.5 mm 2 including pads.

  19. A low cost integrated transceiver for mobile UHF passive RFID reader applications

    Energy Technology Data Exchange (ETDEWEB)

    Wang Jingchao; Zhang Chun; Chi Baoyong; Wang Ziqiang; Li Fule; Wang Zhihua, E-mail: wangjc@gmail.co [Institute of Microelectronics, Tsinghua University, Beijing 100084 (China)

    2009-09-15

    A low cost integrated transceiver for mobile UHF passive RFID reader applications is implemented in a 0.18-{mu}m CMOS process. The transceiver contains an OOK modulator and a power amplifier in the transmitter chain, an IQ direct-down converter, variable-gain amplifiers, channel-select filters and a 10-bit ADC in the receiver chain. The measured output P{sub 1DB} power of the transmitter is 17.6 dBm and the measured receiver sensitivity is -70 dBm. The on-chip integer N synthesizer achieves a frequency resolution of 200 kHz with a phase noise of -104 dBc/Hz at 100 kHz frequency offset and -120.83 dBc/Hz at 1 MHz frequency offset. The transmitter, the receiver and the frequency synthesizer consume 201.34, 25.3 and 54 mW, respectively. The chip has a die area of 4 x 2.5 mm{sup 2} including pads.

  20. Design and implementation of an ultra-low power passive UHF RFID tag

    International Nuclear Information System (INIS)

    Shen Jinpeng; Wang Xin'an; Liu Shan; Zong Hongqiang; Huang Jinfeng; Yang Xin; Feng Xiaoxing; Ge Binjie

    2012-01-01

    This paper presents a fully integrated passive UHF RFID tag chip complying with the ISO18000-6B protocol. The tag chip includes an RF/analog front-end, a baseband processor, and a 512-bit EEPROM memory. To improve power conversion efficiency, a Schottky barrier diode based rectifier is adopted. A novel voltage reference using the peaking current source is discussed in detail, which can meet the low-power, low-voltage requirement while retaining circuit simplicity. Most of the analog blocks are designed to work under sub-1 V to reduce power consumption, and several practical methods are used to further reduce the power consumption of the baseband processor. The whole tag chip is implemented in a TSMC 0.18 μm CMOS process with a die size of 800 × 800 μm 2 . Measurement results show that the total power consumption of the tag chip is only 7.4 μW with a sensitivity of −12 dBm. (semiconductor integrated circuits)

  1. Coplanar UHF RFID tag antenna with U-shaped inductively coupled feed for metallic applications.

    Directory of Open Access Journals (Sweden)

    Karrar Naji Salman

    Full Text Available In this paper, we present a novel compact, coplanar, tag antenna design for metallic objects. Electrically small antenna has designed for a UHF RFID (860-960 MHz based on a proximity-coupled feed through. Furthermore, two symmetrical Via-loaded coplanar grounds fed by a U-shaped inductively coupled feed through an embedded transmission line. This configuration results in an antenna with dimensions of 31 × 19.5 × 3.065 mm3 at 915 MHz, and the total gain for the antenna is 0.12 dBi. The Via-loaded coplanar and U-shaped inductively coupled feeds allow the antenna to provide flexible tuning in terms of antenna impedance. In addition, a figure of merit is applied for the proposed tag antenna, and the results are presented. The read range is measured to be 4.2 m, which is very close to simulated values. This antenna measurement shows very good agreement with simulations.

  2. Design and implementation of a high sensitivity fully integrated passive UHF RFID tag

    International Nuclear Information System (INIS)

    Li Shoucheng; Wang Xin'an; Lin Ke; Shen Jinpeng; Zhang Jinhai

    2014-01-01

    A fully integrated passive UHF RFID tag complying with the ISO18000-6B protocol is presented, which includes an analog front-end, a baseband processor, and an EEPROM memory. To extend the communication range, a high efficiency differential-drive CMOS rectifier is adopted. A novel high performance voltage limiter is used to provide a stable limiting voltage, with a 172 mV voltage variation against temperature variation and process dispersion. The dynamic band-enhancement technique is used in the regulator circuit to improve the regulating capacity. A rail-to-rail hysteresis comparator is adopted to demodulate the signal correctly in any condition. The whole transponder chip is implemented in a 0.18 μm CMOS process, with a die size of 900 × 800 μm 2 . Our measurement results show that the total power consumption of the tag chip is only 6.8 μW, with a sensitivity of −13.5 dBm (semiconductor integrated circuits)

  3. Near Field UHF RFID Antenna System Enabling the Tracking of Small Laboratory Animals

    Directory of Open Access Journals (Sweden)

    Luca Catarinucci

    2013-01-01

    Full Text Available Radio frequency identification (RFID technology is more and more adopted in a wide range of applicative scenarios. In many cases, such as the tracking of small-size living animals for behaviour analysis purposes, the straightforward use of commercial solutions does not ensure adequate performance. Consequently, both RFID hardware and the control software should be tailored for the particular application. In this work, a novel RFID-based approach enabling an effective localization and tracking of small-sized laboratory animals is proposed. It is mainly based on a UHF Near Field RFID multiantenna system, to be placed under the animals’ cage, and able to rigorously identify the NF RFID tags implanted in laboratory animals (e.g., mice. Once the requirements of the reader antenna have been individuated, the antenna system has been designed and realized. Moreover, an algorithm based on the measured Received Signal Strength Indication (RSSI aiming at removing potential ambiguities in data captured by the multiantenna system has been developed and integrated. The animal tracking system has been largely tested on phantom mice in order to verify its ability to precisely localize each subject and to reconstruct its path. The achieved and discussed results demonstrate the effectiveness of the proposed tracking system.

  4. A UHF RFID system with on-chip-antenna tag for short range communication

    International Nuclear Information System (INIS)

    Peng Qi; Zhang Chun; Zhao Xijin; Wang Zhihua

    2015-01-01

    A UHF RF identification system based on the 0.18 μm CMOS process has been developed for short range and harsh size requirement applications, which is composed of a fully integrated tag and a special reader. The whole tag chip with the antenna takes up an area of 0.36 mm 2 , which is smaller than other reported tags with an on-chip antenna (OCA) using the standard CMOS process. A self-defined protocol is proposed to reduce the power consumption, and minimize the size of the tag. The specialized SOC reader system consists of the RF transceiver, digital baseband, MCU and host interface. Its power consumption is about 500 mW. Measurement results show that the system's reading range is 2 mm with 20 dBm reader output power. With an inductive antenna printed on a paper substrate around the OCA tag, the reading range can be extended from several centimeters to meters, depending on the shape and size of the inductive antenna. (paper)

  5. First UHF Implementation of the Incremental Scheme for Open-Shell Systems.

    Science.gov (United States)

    Anacker, Tony; Tew, David P; Friedrich, Joachim

    2016-01-12

    The incremental scheme makes it possible to compute CCSD(T) correlation energies to high accuracy for large systems. We present the first extension of this fully automated black-box approach to open-shell systems using an Unrestricted Hartree-Fock (UHF) wave function, extending the efficient domain-specific basis set approach to handle open-shell references. We test our approach on a set of organic and metal organic structures and molecular clusters and demonstrate standard deviations from canonical CCSD(T) values of only 1.35 kJ/mol using a triple ζ basis set. We find that the incremental scheme is significantly more cost-effective than the canonical implementation even for relatively small systems and that the ease of parallelization makes it possible to perform high-level calculations on large systems in a few hours on inexpensive computers. We show that the approximations that make our approach widely applicable are significantly smaller than both the basis set incompleteness error and the intrinsic error of the CCSD(T) method, and we further demonstrate that incremental energies can be reliably used in extrapolation schemes to obtain near complete basis set limit CCSD(T) reaction energies for large systems.

  6. A voltage regulator system with dynamic bandwidth boosting for passive UHF RFID transponders

    International Nuclear Information System (INIS)

    Shen Jinpeng; Wang Xin'an; Liu Shan; Li Shoucheng; Ruan Zhengkun

    2013-01-01

    This paper presents a voltage regulator system for passive UHF RFID transponders, which contains a rectifier, a limiter, and a regulator. The rectifier achieves power by rectifying the incoming RF energy. Due to the huge variation of the rectified voltage, a limiter at the rectifier output is used to clamp the rectified voltage. In this paper, the design of a limiter circuit is discussed in detail, which can provide a stable limiting voltage with low sensitivity to temperature variation and process dispersion. The key aspect of the voltage regulator system is the dynamic bandwidth boosting in the regulator. By sensing the excess current that is bypassed in the limiter during periods of excess energy, the bias current as well as the bandwidth of the regulator are increased, the output supply voltage can recover quickly from line transients during the periods of no RF energy to a full blast of RF energy. This voltage regulator system is implemented in a 0.18 μm CMOS process. (semiconductor integrated circuits)

  7. Design of planar electron gun for UHF range, CW power inductive output tube

    International Nuclear Information System (INIS)

    Kaushik, Meenu; Joshi, L.M.

    2015-01-01

    Inductive Output Tube (lOT) is an amplifier which is now-a-days in demand for scientific applications. For every vacuum tube, electron gun is an important part and in fact considered as the heart of the tube. Hence, designing of this component is very crucial for efficient operation of the device throughout its lifetime. This paper is all about the electromagnetic (EM) design of planar electron gun of 40 kV, 3.5 A beam voltage and beam current respectively, for a 100 kW CW power lOT operating in UHF range. The design considerations and basic equations involved in its design are included in the paper. The gun structure has been optimized for getting the desired beam characteristics. The simulation results including the beam profile along with the beam current are shown using two commercial codes namely TRAK and MAGIC code. Planar shape of electron beam reduces space charge forces in the beam itself and consequently beam energy spread for a given current. The magnetic focusing of planar beam is easier comparative to spherical beam hence, this structure has been adopted for this particular device design. (author)

  8. In situ occupational and general public exposure to VHF/UHF transmission for air traffic communication.

    Science.gov (United States)

    Joseph, Wout; Goeminne, Francis; Verloock, Leen; Vermeeren, Günter; Martens, Luc

    2012-09-01

    Occupational and general public exposure due to very high frequency (VHF)/ultra high frequency (UHF) transmission centres for verbal communication for air traffic control is investigated in situ for the first time. These systems are used for communication with aircraft, resulting in different human exposure from that of classical broadcasting. Measurement methods are proposed for the exposure assessment, and a measurement campaign is executed in three transmission centres. By investigating the temporal behaviour of the VHF signals for 6 d, a realistic worst-case duty cycle of 29 % is determined. Periods of high exposures corresponding with high aircraft traffic are from 7 a.m. to 1 p.m. and in the evening. All measured electric-field values satisfy the International Commission on Non-ionizing Radiation Protection guidelines. Fields vary from 0.2 to 21.1 V m(-1) for occupational exposure and from 0.007 to 8.0 V m(-1) for general public exposure. The average fields equal 5.2 V m(-1) for workers, and 0.7 V m(-1) for general public.

  9. In situ occupational and general public exposure to VHF/UHF transmission for air traffic communication

    International Nuclear Information System (INIS)

    Joseph, W.; Goeminne, F.; Verloock, L.; Vermeeren, G.; Martens, L.

    2012-01-01

    Occupational and general public exposure due to very high frequency (VHF)/ultra high frequency (UHF) transmission centres for verbal communication for air traffic control is investigated in situ for the first time. These systems are used for communication with aircraft, resulting in different human exposure from that of classical broadcasting. Measurement methods are proposed for the exposure assessment, and a measurement campaign is executed in three transmission centres. By investigating the temporal behaviour of the VHF signals for 6 d, a realistic worst-case duty cycle of 29 % is determined. Periods of high exposures corresponding with high aircraft traffic are from 7 a.m. to 1 p.m. and in the evening. All measured electric field values satisfy the International Commission on Non-ionizing Radiation Protection guidelines. Fields vary from 0.2 to 21.1 V m -1 for occupational exposure and from 0.007 to 8.0 V m -1 for general public exposure. The average fields equal 5.2 V m -1 for workers, and 0.7 V m -1 for general public. (authors)

  10. OSL-SAR dating of sediments from Brazilian aeolian system: Dama Branca, Rio de Janeiro, morphodynamic study

    International Nuclear Information System (INIS)

    Carmo, Lucas S. do; Watanabe, Shigueo; DeWitt, Regina

    2017-01-01

    It has been reported that the formation and stabilization of coastal dune fields in Brazil have a dependence on the climate changes and Relative Sea Level (RSL) variations. A few topics regarding the morphodynamics of coastal aeolian systems in Brazil can be the RSL variations in the Holocene and weather conditions. In this work, a dune field known as 'Dama Branca', located in the town of Cabo Frio, Rio de Janeiro, has been studied to understand its formation and stabilization. Dating by trapped charge dating techniques as Optically Stimulated Luminescence (OSL) using the Single Aliquot Regenerative protocol (SAR), help to understand the formation and dynamics of aeolian systems in Brazil. Samples from a dune were collected from different heights and points for dating. The results obtained by OSL-SAR showed that ages decrease as the height from the dune base increase and older samples are found in deeper horizontal positions. The ages for the base of the studied dunes indicated that its stabilization occurred during the recess of the sea level. (author)

  11. La dama fantasma y el monstruo del lago: Narración, ciencia y creencias en actuaciones discursivas

    Directory of Open Access Journals (Sweden)

    María Inés Palleiro

    2011-12-01

    Full Text Available En este artículo, examino la dinámica entre ficción e historia, ciencia y creencia, en versiones de dos matrices folklóricas de distintas latitudes: la dama fantasma en sus distintos nombres —desde Rufina Cambacères a Frederike von Grotes y Matilde de Canossa— y el monstruo del lago, conocido como el Nahuelito, en una versión local del monstruo de Loch Ness. Trabajo con relatos registrados en contextos diversos y en soportes diferentes, que incluyen los circuitos mediáticos. Examino en ellos la articulación retórica del mensaje, cuyo contenido semántico se relaciona con creencias colectivas, entendidas como enunciados cuyo valor de verdad depende de un acuerdo intersubjetivo. Analizo la dinámica entre el saber experto de las ciencias y la narrativa de creencias, que intenta dar una respuesta totalizadora a problemas tales como la finitud de la vida o el temor a lo desconocido, para los cuales la ciencia canónica no brinda una respuesta satisfactoria.

  12. Revistas, consumos, alimentación y saberes femeninos. La propuesta de Damas y Damitas, Argentina, 1939-1944

    Directory of Open Access Journals (Sweden)

    Paula Caldo

    2016-01-01

    Full Text Available El presente artículo aborda un aspecto puntual del abanico que se extiende en torno a la problemática de la transmisión de los saberes femeninos: la transmisión escrita del saber culinario y sus connotaciones teóricas, prácticas, performativas y económicas. Específicamente, nos concentraremos en la Argentina en el cruce de las décadas de los treinta y los cuarenta, recorte que coincide con la consolidación de la sociedad de consumo y con la irrupción en el mercado editorial de una revista femenina llamada Damas y Damitas, que tomaremos como referente empírico de nuestro análisis. En dicha publicación recuperamos el accionar de la ecónoma encargada de enseñar a cocinar pero también de prescribir un deber ser y un saber elegir (la marca a sus congéneres.

  13. OSL-SAR dating of sediments from Brazilian aeolian system: Dama Branca, Rio de Janeiro, morphodynamic study

    Energy Technology Data Exchange (ETDEWEB)

    Carmo, Lucas S. do; Watanabe, Shigueo, E-mail: lsatiro@usp.br, E-mail: lacifid@if.usp.br [Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), São Paulo, SP (Brazil); DeWitt, Regina, E-mail: dewittr@ecu.edu [East Carolina University (ECU), Greenville, NC (United States)

    2017-07-01

    It has been reported that the formation and stabilization of coastal dune fields in Brazil have a dependence on the climate changes and Relative Sea Level (RSL) variations. A few topics regarding the morphodynamics of coastal aeolian systems in Brazil can be the RSL variations in the Holocene and weather conditions. In this work, a dune field known as 'Dama Branca', located in the town of Cabo Frio, Rio de Janeiro, has been studied to understand its formation and stabilization. Dating by trapped charge dating techniques as Optically Stimulated Luminescence (OSL) using the Single Aliquot Regenerative protocol (SAR), help to understand the formation and dynamics of aeolian systems in Brazil. Samples from a dune were collected from different heights and points for dating. The results obtained by OSL-SAR showed that ages decrease as the height from the dune base increase and older samples are found in deeper horizontal positions. The ages for the base of the studied dunes indicated that its stabilization occurred during the recess of the sea level. (author)

  14. Cognitive Communications Protocols for SATCOM

    Science.gov (United States)

    2017-10-20

    communications protocols for satellite and space communications with possible broad applications in defense, homeland-security as well as consumer ...communications with possible broad applications in defense, homeland-security, and civilian as well as consumer telecommunications. Such cognitive...vulnerable against smart jammers that may attempt to learn the cognitive radios own behavior . In response, our second class of proposed algorithms

  15. Vertical velocity and turbulence aspects during Mistral events as observed by UHF wind profilers

    Directory of Open Access Journals (Sweden)

    J.-L. Caccia

    2004-11-01

    Full Text Available The general purpose of this paper is to experimentally study mesoscale dynamical aspects of the Mistral in the coastal area located at the exit of the Rhône-valley. The Mistral is a northerly low-level flow blowing in southern France along the Rhône-valley axis, located between the French Alps and the Massif Central, towards the Mediterranean Sea. The experimental data are obtained by UHF wind profilers deployed during two major field campaigns, MAP (Mesoscale Alpine Program in autumn 1999, and ESCOMPTE (Expérience sur Site pour COntraindre les Modèles de Pollution atmosphériques et de Transports d'Emission in summer 2001.

    Thanks to the use of the time evolution of the vertical profile of the horizontal wind vector, recent works have shown that the dynamics of the Mistral is highly dependent on the season because of the occurrence of specific synoptic patterns. In addition, during summer, thermal forcing leads to a combination of sea breeze with Mistral and weaker Mistral due to the enhanced friction while, during autumn, absence of convective turbulence leads to substantial acceleration as low-level jets are generated in the stably stratified planetary boundary layer. At the exit of the Rhône valley, the gap flow dynamics dominates, whereas at the lee of the Alps, the dynamics is driven by the relative contribution of "flow around" and "flow over" mechanisms, upstream of the Alps. This paper analyses vertical velocity and turbulence, i.e. turbulent dissipation rate, with data obtained by the same UHF wind profilers during the same Mistral events.

    In autumn, the motions are found to be globally and significantly subsident, which is coherent for a dry, cold and stable flow approaching the sea, and the turbulence is found to be of pure dynamical origin (wind shears and mountain/lee wave breaking, which is coherent with non-convective situations.

    A UHF RFID positioning system for use in warehouse navigation by employees with cognitive disability.

    Science.gov (United States)

    Gunther, Eric J M; Sliker, Levin J; Bodine, Cathy

    2017-11-01

    Unemployment among the almost 5 million working-age adults with cognitive disabilities in the USA is a costly problem in both tax dollars and quality of life. Job coaching is an effective tool to overcome this, but the cost of job coaching services sums with every new employee or change of employment roles. There is a need for a cost-effective, automated alternative to job coaching that incurs a one-time cost and can be reused for multiple employees or roles. An effective automated job coach must be aware of its location and the location of destinations within the job site. This project presents a design and prototype of a cart-mounted indoor positioning and navigation system with necessary original software using Ultra High Frequency Radio Frequency Identification (UHF RFID). The system presented in this project for use within a warehouse setting is one component of an automated job coach to assist in the job of order filler. The system demonstrated accuracy to within 0.3 m under the correct conditions with strong potential to serve as the basis for an effective indoor navigation system to assist warehouse workers with disabilities. Implications for rehabilitation An automated job coach could improve employability of and job retention for people with cognitive disabilities. An indoor navigation system using ultra high frequency radio frequency identification was proposed with an average positioning accuracy of 0.3 m. The proposed system, in combination with a non-linear context-aware prompting system, could be used as an automated job coach for warehouse order fillers with cognitive disabilities.

  16. UHF-RFID solutions for logistics units management in the food supply chain

    Directory of Open Access Journals (Sweden)

    Paolo Barge

    2013-09-01

    Full Text Available The availability of systems for automatic and simultaneous identification of several items belonging to a logistics unit during production, warehousing and delivering can improve supply chain management and speed traceability controls. Radio frequency identification (RFID is a powerful technique that potentially permits to reach this goal, but some aspects as, for instance, food product composition (e.g. moisture content, salt or sugar content and some peculiarities of the production environment (high moisture, high/low temperatures, metallic structures have prevented, so far, its application in food sector. In the food industry, composition and shape of items are much less regular than in other commodities sectors. In addition, a wide variety of packaging, composed by different materials, is employed. As material, size and shape of items to which the tag should be attached strongly influence the minimum power requested for tag functioning, performance improvements can be achieved only selecting suitable RF identifier for the specific combination of food product and packaging. When dealing with logistics units, the dynamic reading of a vast number of tags originates simultaneous broadcasting of signals (tag-to-tag collisions that could affect reading rates and the overall reliability of the identification procedure. This paper reports the results of an extensive analysis of the reading performance of UHF RFID systems for multiple dynamic electronic identification of food packed products in controlled conditions. Products were considered singularly or arranged on a logistics pallet. The effects on reading rate and reading zone of different factors, among which the type of product, the number and position of antennas, the field polarization, the reader RF power output, the interrogation protocol configuration as well as the transit speed, the number of tags and their interactions were analysed and compared.

  17. Scenarios and business models for mobile network operators utilizing the hybrid use concept of the UHF broadcasting spectrum

    Directory of Open Access Journals (Sweden)

    S. Yrjölä

    2016-09-01

    Full Text Available This paper explores and presents scenarios and business models for mobile network operators (MNOs in the novel hybrid use spectrum sharing concept of the Ultra High Frequency broadcasting spectrum (470-790 MHz used for Digital Terrestrial TV (DTT and Mobile Broadband (MBB. More flexible use of the band could lead to higher efficiency in delivering fast growing and converging MBB, media and TV content to meet changing consumer needs. On one hand, this could be beneficial for broadcasters (BC, e.g., by preserving the spectrum, by providing additional revenues, or by lowering cost of the spectrum and, on the other hand, for MNOs to gain faster access to new potentially lower cost, licensed, below 1GHz spectrum to cope with booming data traffic. As a collaborative benefit, the concept opens up new business opportunities for delivering TV and media content using MBB network with means to introduce this flexibly. This paper highlights the importance of developing sound business models for the new spectrum use concept, as they need to provide clear benefits to the key stakeholders to be adopted in real life. The paper applies a future and action oriented approach to the MBB using the concept to derive scenarios and business models for MNOs for accessing hybrid UHF bands. In order to address the convergence and transformation coming with the concept, business models are first developed for the current situation with separate exclusive spectrum bands. Novel business scenarios are then developed for the introduction of the new flexible hybrid UHF spectrum concept. The created business model indicates that the MNOs could benefit significantly from the new UHF bands, which would enable them to cope with increasing data traffic asymmetry, and to offer differentiation through personalized broadcasting and new media services. Moreover, it could significantly re-shape the business ecosystem around both the broadcasting and the mobile broadband by introducing

  18. Resonance of conductivity in UHF-range to the action of alternating current in La0.7Pb0.3MnO3 crystals

    International Nuclear Information System (INIS)

    Volkov, N.V.; Petrakovskij, G.A.; Sablina, K.A.

    1999-01-01

    The experimental results of the study on the effect of the low frequency transport current on the conductivity in UHF-range of the La 0.7 Pb 0.3 MnO 3 monocrystals are presented. In absence of the external magnetic field the UHF-conductivity response signal on the current impact has the form of the relaxation process. The peak of the amplitude resonance growth is observed in the external magnetic field in the response spectrum. The resonance response is of nonlinear character. The temperature and field dependences of the UHF-response basic parameters are in direct correlation with the magnetoresistance behaviour. The results obtained are analyzed within the frames of the oscillatory approximation. The mechanism of the phases electron separation is proposed as the possible mechanism of the current impact [ru

  19. El rol de las ONG de España en el internacionalización de la causa de las Damas de Blanco. Estudio de caso: Solidaridad Española con Cuba (2005-2012)

    OpenAIRE

    Tenjo Montes, Jineth Milena

    2014-01-01

    El interés de este estudio de caso es demostrar el rol de la ONG Solidaridad Española con Cuba en la creación de una red transnacional de defensa de las Damas de Blanco, un movimiento social cubano disidente. Esto, tras reconocer que el apoyo por parte de ésta y otras organizaciones e instituciones internacionales es de gran importancia para lograr las reivindicaciones sociales propuestas por las Damas de Blanco, a partir de los hechos ocurridos en la Primavera Negra en el año 2003. Tanto las...

  1. Cuentos medievales: "La dama del castillo del gavilán" y el "Ejemplo de las flechas" Juan de Mandevilla, Libro de las maravillas del mundo

    OpenAIRE

    María Mercedes Rodríguez Temperley

    2003-01-01

    A partir de los últimos estudios acerca de la cuentística medieval, tendientes a ampliar el corpus de relatos insertos no sólo en colecciones de cuentos sino en textos muy variados, se rastrean y clasifican los incluidos en el Libro de las maravillas del mundo de Juan de Mandevilla. Asimismo, se realiza el análisis puntual de dos cuentos: "La dama del castillo del gavilán" y el "Ejemplo de las flechas". Taking account of the last studies about medieval tales, which intend to enlarge the co...

  2. Study of the coastal atmospheric boundary layer during ESCOMPTE 2001. Evaluation and improvement of the efficiency of a UHF radar; Etude de la couche limite atmospherique cotiere durant ESCOMPTE 2001. Evaluation et amelioration des performances d'un radar UHF

    Energy Technology Data Exchange (ETDEWEB)

    Puygrenier, V

    2005-12-15

    Forecasting of pollution events was the main objective of the ESCOMPTE-2001 campaign, which took place in the Marseille/Fos/Berre heterogeneous area (southeastern France) in the early summer 2001. This goal requires good understanding and taking into account, by physico-chemical numerical models, of the physical processes in the Atmospheric Boundary Layer (ABL), in which pollutants are emitted, transported and diffused. In the ESCOMPTE-2001 campaign context, this work was devoted to study the low troposphere during sea breeze events, related to meteorological conditions responsible for poor air quality of coastal areas. It presents notably an oscillation of the sea breeze intensity and competitions of locals and regional sea breeze, which change the advective time of the marine air above the continental surface and thus influence the ABL development and its pollutants concentration. This study is based principally on the network of four UHF wind profilers radars set up on the coastal area of Marseille/Fos/Berre, allowing a continuous three-dimensional description of the sea breeze flow and the ABL. For the needs of this phenomenological work, methodological developments was realized to improve the measurement of ABL turbulent properties with UHF radars (terms of turbulent kinetic energy budget) and the use of wind profilers network for the study of pollutants plumes trajectory-graphy. (author)

  3. Comparative Method for Indirect Sensitivity Measurement of UHF RFID Reader with Respect to Interoperability and Conformance Requirements

    Directory of Open Access Journals (Sweden)

    Lukas Kypus

    2014-01-01

    Full Text Available There is never-ending race for the competitive advantage that forces RFID technology service integrators to focus more on used technology qualitative aspects and theirs impacts inside RFID ecosystem. This paper contributes to UHF RFID reader qualitative parameters evaluation and assessment problematic. It presents and describes in details indirect method and procedure of sensitivity measurement created for UHF RFID readers. We applied this method on RFID readers within prepared test environment and confirmed long term intention and recognized trend. Due to regulations limitations, there is not possible to increase output power over defined limits, but there are possibilities to influence reader sensitivity. Our proposal is to use customized comparative measurement method with insertion loss compensation for return link. Beside the main goal achievement, results show as well the qualitative status of development snapshot of reader. Method and following experiment helped us to gain an external view, current values of important parameters and motivation we want to follow up on as well as compared developed reader with its commercial competitors.

  4. Sismos, causas y efectos: recuento de los daños del Sismo de Damas, 20 de noviembre del 2004, Costa Rica

    Directory of Open Access Journals (Sweden)

    Méndez Herrera, Joanna

    2007-06-01

    Full Text Available El artículo contiene información concerniente al origen de los sismos y las principales características que presentó el Sismo de Damas del año 2004. También hace una descripción de los diferentes tipos de daños que se presentaron y el impacto que tuvo en algunas comunidades aledañas al epicentro. Por último, expone los efectos secundarios percibidos, un año después y sus consecuencias, a raíz de las fuertes precipitaciones que provocaron deslizamientos en laderas inestables por el sismo The article includes information related to the origin of seisms and the main characteristics of the Damas earthquake, 2004. It also describes the different types of damages presented and the impact in some of the communities close to the epicenter. Lastly, it exposes the secondary effect perceived a year later and its consequences due to the strong precipitations that caused landslides in unstable hillsides after the earthquake

  5. A margem e(m suas metáforas: exlusão e identidade em Dama da noite, de Caio Fernando Abreu

    Directory of Open Access Journals (Sweden)

    Santiago Bretanha Freitas

    2016-03-01

    Full Text Available Partindo dos conceitos de identidade e interdição alcunhados por Michel Foucault, objetivamos, no presente trabalho, analisar a obra Dama da noite, do autor gaúcho Caio Fernando Abreu. A dita obra se constitui pela voz da narradora-protagonista Dama da noite, em um monólogo endereçado ao “boy”, em uma boate; a fala da personagem gira ao redor de sua apreciação para com o movimento da roda-gigante, metáfora utilizada para retratar a sua cosmovisão. Por meio de tais afirmações, e delimitando o objetivo da análise, pretendemos, modestamente, analisar a metáfora da roda-gigante presente na obra, transpassando as identidades, a marginalidade e, de certa maneira, a interdição que norteiam o discurso da protagonista, entendendo-a como queer. Cremos haver trazido uma singela contribuição ao entendimento dos mecanismos de exclusão e normalização passíveis de serem desconstruídos na obra, bem como para a compreensão de como se realizam os discursos no palco das relações de poder.

  6. Consolidated Ground Segment Requirements for a UHF Radar for the ESSAS

    Science.gov (United States)

    Muller, Florent; Vera, Juan

    2009-03-01

    ESA has launched a nine months long study to define the requirements associated to the ground segment of a UHF (300-3000 MHz) radar system. The study has been awarded in open competition to a consortium led by Onera, associated to the Spanish companies Indra and its sub-contractor Deimos. After a phase of consolidation of the requirements, different monostatic and bistatic concepts of radars will be proposed and evaluated. Two concepts will be selected for further design studies. ESA will then select the best one, for detailed design as well as cost and performance evaluation. The aim of this paper is to present the results of the first phase of the study concerning the consolidation of the radar system requirements. The main mission for the system is to be able to build and maintain a catalogue of the objects in low Earth orbit (apogee lower than 2000km) in an autonomous way, for different sizes of objects, depending on the future successive development phases of the project. The final step must give the capability of detecting and tracking 10cm objects, with a possible upgrade to 5 cm objects. A demonstration phase must be defined for 1 m objects. These different steps will be considered during all the phases of the study. Taking this mission and the different steps of the study as a starting point, the first phase will define a set of requirements for the radar system. It was finished at the end of January 2009. First part will describe the constraints derived from the targets and their environment. Orbiting objects have a given distribution in space, and their observability and detectability are based on it. It is also related to the location of the radar system But they are also dependant on the natural propagation phenomenon, especially ionospheric issues, and the characteristics of the objects. Second part will focus on the mission itself. To carry out the mission, objects must be detected and tracked regularly to refresh the associated orbital parameters

  7. Design and Optimization of Passive UHF RFID Tag Antenna for Mounting on or inside Material Layers

    Science.gov (United States)

    Shao, Shuai

    There is great desire to employ passive UHF RFID tags for inventory tracking and sensing in a diversity of applications and environments. Owing to its battery-free operation, non-line-of sight detection, low cost, long read range and small form factor, each year billions of RFID tags are being deployed in retail, logistics, manufacturing, biomedical inventories, among many other applications. However, the performance of these RFID systems has not met expectations. This is because a tag's performance deteriorates significantly when mounted on or inside arbitrary materials. The tag antenna is optimized only for a given type of material at a certain location of placement, and detuning takes place when attached to or embedded in materials with dielectric properties outside the design range. Thereby, different customized tags may be needed for identifying objects even within the same class of products. This increases the overall cost of the system. Furthermore, conventional copper foil-based RFID tag antennas are prone to metal fatigue and wear, and cannot survive hostile environments where antennas could be deformed by external forces and failures occur. Therefore, it is essential to understand the interaction between the antenna and the material in the vicinity of the tag, and design general purpose RFID tag antennas possessing excellent electrical performance as well as robust mechanical structure. A particularly challenging application addressed here is designing passive RFID tag antennas for automotive tires. Tires are composed of multiple layers of rubber with different dielectric properties and thicknesses. Furthermore, metallic plies are embedded in the sidewalls and steel belts lie beneath the tread to enforce mechanical integrity. To complicate matters even more, a typical tire experiences a 10% stretching during the construction process. This dissertation focuses on intuitively understanding the interaction between the antenna and the material in the

  8. A current-mode voltage regulator with an embedded sub-threshold reference for a passive UHF RFID transponder

    International Nuclear Information System (INIS)

    Liu Zhongqi; Zhang Chun; Li Yongming; Wang Zhihua

    2010-01-01

    This paper presents a current-mode voltage regulator for a passive UHF RFID transponder. The passive tag power is extracted from RF energy through the RF-to-DC rectifier. Due to huge variations of the incoming RF power, the rectifier output voltage should be regulated to achieve a stable power supply. By accurately controlling the current flowing into the load with an embedded sub-threshold reference, the regulated voltage varies in a range of 1-1.3 V from -20 to 80 0 C, and a bandwidth of about 100 kHz is achieved for a fast power recovery. The circuit is fabricated in UMC 0.18 μm mixed-mode CMOS technology, and the current consumption is only 1 μA. (semiconductor integrated circuits)

  9. A current-mode voltage regulator with an embedded sub-threshold reference for a passive UHF RFID transponder

    Energy Technology Data Exchange (ETDEWEB)

    Liu Zhongqi [Department of Electronic Engineering, Tsinghua University, Beijing 100084 (China); Zhang Chun; Li Yongming; Wang Zhihua, E-mail: liu-zq04@mails.tsinghua.edu.c [Institute of Microelectronics, Tsinghua University, Beijing 100084 (China)

    2010-06-15

    This paper presents a current-mode voltage regulator for a passive UHF RFID transponder. The passive tag power is extracted from RF energy through the RF-to-DC rectifier. Due to huge variations of the incoming RF power, the rectifier output voltage should be regulated to achieve a stable power supply. By accurately controlling the current flowing into the load with an embedded sub-threshold reference, the regulated voltage varies in a range of 1-1.3 V from -20 to 80 {sup 0}C, and a bandwidth of about 100 kHz is achieved for a fast power recovery. The circuit is fabricated in UMC 0.18 {mu}m mixed-mode CMOS technology, and the current consumption is only 1 {mu}A. (semiconductor integrated circuits)

  10. Wearable Passive E-Textile UHF RFID Tag Based on a Slotted Patch Antenna with Sewn Ground and Microchip Interconnections

    Directory of Open Access Journals (Sweden)

    Johanna Virkki

    2017-01-01

    Full Text Available We present a wearable passive UHF RFID tag based on a slotted patch antenna comprising only textile materials (e-textile, textile substrate, and conductive yearn. As a novel manufacturing approach, we realize the patch-to-ground and antenna-to-IC interfaces using only conductive thread and a sewing machine. We outline the electromagnetic optimization of the antenna for body-worn operation through simulations and present a performance comparison between the e-textile tag and a tag produced using regular electronics materials and methods. The measured results show that the textile tag achieves the electrical performance required in practical applications and that the slotted patch type antenna provides stable electromagnetic performance in different body-worn configurations.

  11. CPW-fed Circularly Polarized Slot Antenna with Small Gap and Stick-shaped Shorted Strip for UHF FRID Readers

    Science.gov (United States)

    Pan, Chien-Yuan; Su, Chum-Chieh; Yang, Wei-Lin

    2018-04-01

    A new circularly polarized (CP) slot antenna with a small gap and a stick-shaped shorted strip is presented. The proposed antenna has a sufficient bandwidth for ultrahigh frequency (UHF) radio-frequency identification (RFID) reader applications. The antenna structure consists of a rectangular slot with a small gap, a stick-shaped shorted strip and a 50 Ω coplanar waveguide (CPW) feedline with an asymmetrical ground plane. By using the stick -shaped shorted strip to disturb magnetic current distribution on the slot, the CP radiation can be generated. The measured results demonstrate that the proposed antenna can reach a 10 dB return loss impedance bandwidth of 14.1 % (894-1030 MHz) and a 3 dB axial ratio (AR) bandwidth of 6.4 % (910-970 MHz). The whole antenna size is 80 × 80 × 1.6 mm3.

  12. On the Feasibility of Gap Detection of Power Transformer Partial Discharge UHF Signals: Gap Propagation Characteristics of Electromagnetic Waves

    Directory of Open Access Journals (Sweden)

    Xiaoxing Zhang

    2017-10-01

    Full Text Available This study analyzed the transformer electromagnetic gap propagation characteristics. The influence of gap size is also analyzed, and the results experimentally verified. The obtained results indicated that the gap propagation characteristics of electromagnetic wave signals radiated by the partial discharge (PD source in different directions are substantially different. The intensity of the electromagnetic wave in the gap reaches a maximum at a gap height of 1 cm; and inside the gap, the intensity of the electromagnetic wave depicted an increasing trend at the tail area of the gap. Finally, from the obtained results, some suggestions on where to install sensors in practical systems for ultra high frequency (UHF PD signal detection in the transformer gap are provided. The obtained results confirmed the feasibility of using this approach. These results can be seen as a benchmark and a challenge for further research in this field.

  13. THE DARK FACE OF ALEXANDRE HERCULANO: HISTORICAL VIEWS OF THE EVIL IN THE CONSTRUCTION OF THE SUPERNATURAL IN “A DAMA PÉ DE CABRA”

    Directory of Open Access Journals (Sweden)

    Ana Márcia Alves Siqueira

    2012-04-01

    Full Text Available Genre which evokes distinct interests in the history and in the literary cri­tic, the noir literature, as it is known the supernatural stories of the XIX century, presents various branches not yet explored. In Portugal, Alexan­dre Herculano consolidates himself as the precursor of historical novels, result of the harmony between his work collecting Portuguese historical sources and his romantic esthetic project. His works, however, reveal a dark side little studied, influenced by the French noir short stories, the English horror ballad, and the German macabre narratives. This work, therefore, proposes to investigate the processes of construction of dark atmosphere in short story “A Dama Pé de Cabra” as well as to investigate how the author conciliates the compression of medieval Evil in a romantic project. 

  14. Egeria, la Dama Peregrina

    Directory of Open Access Journals (Sweden)

    Pascual, Carlos

    2005-04-01

    Full Text Available En los últimos años del siglo IV, cuando el imperio romano está a punto de derrumbarse, una mujer hispana de alta alcurnia se pone en camino para conocer y venerar los Santos Lugares, recién «descubiertos» por santa Helena. Atravesando la «Vía Domitia» llega a la capital de la pars orientis del Imperio, Constantinopla, continúa hasta Jerusalén, recorre parajes bíblicos, incluido el Sinai y algunos lugares de Mesopotamia. Va narrando cuanto ve, con deliciosa frescura, en unas cartas dirigidas a las amigas que quedaron en la patria. Su relato, copiado por algún monje en el siglo XI, fue hallado en 1884 en una biblioteca italiana. Tras una investigación prolongada, se pudo poner nombre y rostro a esta matrona piadosa. Egeria, la primera viajera-escritora española de que tengamos noticia.…

  15. Egeria, la Dama Peregrina

    OpenAIRE

    Pascual, Carlos

    2005-01-01

    En los últimos años del siglo IV, cuando el imperio romano está a punto de derrumbarse, una mujer hispana de alta alcurnia se pone en camino para conocer y venerar los Santos Lugares, recién «descubiertos» por santa Helena. Atravesando la «Vía Domitia» llega a la capital de la pars orientis del Imperio, Constantinopla, continúa hasta Jerusalén, recorre parajes bíblicos, incluido el Sinai y algunos lugares de Mesopotamia. Va narrando cuanto ve, con deliciosa frescur...

  16. A dual-mode secure UHF RFID tag with a crypto engine in 0.13-μm CMOS

    Science.gov (United States)

    Tao, Yang; Linghao, Zhu; Xi, Tan; Junyu, Wang; Lirong, Zheng; Hao, Min

    2016-07-01

    An ultra-high-frequency (UHF) radio frequency identification (RFID) secure tag chip with a non-crypto mode and a crypto mode is presented. During the supply chain management, the tag works in the non-crypto mode in which the on-chip crypto engine is not enabled and the tag chip has a sensitivity of -12.8 dBm for long range communication. At the point of sales (POS), the tag will be switched to the crypto mode in order to protect the privacy of customers. In the crypto mode, an advanced encryption standard (AES) crypto engine is enabled and the sensitivity of the tag chip is switched to +2 dBm for short range communication, which is a method of physical protection. The tag chip is implemented and verified in a standard 0.13-μm CMOS process. Project supported by the National Science & Technology Pillar Program of China (No. 2015BAK36B01).

  17. Navy Network Dependability: Models, Metrics, and Tools

    Science.gov (United States)

    2010-01-01

    surveillance; TCDL = Tactical Common Data Link; UHF = ultra high frequency; UFO = ultra-high-frequency follow-on; WGS = Wideband Gapfiller Satellite. RAND...VOICE (DMR VALUES) UFO OE-82 UHF LOS VOICE (DMR VALUES) UHF SATCOM VOICE DMR UHF LOS VOICE DMR TVs ADMS KIV-7 COMSEC ADNS SW ADNS II HW ISNS SW ISNS HW...Data Link; UHF = ultra high frequency; UFO = ultra-high-frequency follow-on; WGS = Wideband Gapfiller Satellite. RAND MG1003-1.1 4 Navy Network

  18. Electromagnetic fields (UHF) increase voltage sensitivity of membrane ion channels; possible indication of cell phone effect on living cells.

    Science.gov (United States)

    Ketabi, N; Mobasheri, H; Faraji-Dana, R

    2015-03-01

    The effects of ultra high frequency (UHF) nonionizing electromagnetic fields (EMF) on the channel activities of nanopore forming protein, OmpF porin, were investigated. The voltage clamp technique was used to study the single channel activity of the pore in an artificial bilayer in the presence and absence of the electromagnetic fields at 910 to 990 MHz in real time. Channel activity patterns were used to address the effect of EMF on the dynamic, arrangement and dielectric properties of water molecules, as well as on the hydration state and arrangements of side chains lining the channel barrel. Based on the varied voltage sensitivity of the channel at different temperatures in the presence and absence of EMF, the amount of energy transferred to nano-environments of accessible groups was estimated to address the possible thermal effects of EMF. Our results show that the effects of EMF on channel activities are frequency dependent, with a maximum effect at 930 MHz. The frequency of channel gating and the voltage sensitivity is increased when the channel is exposed to EMF, while its conductance remains unchanged at all frequencies applied. We have not identified any changes in the capacitance and permeability of membrane in the presence of EMF. The effect of the EMF irradiated by cell phones is measured by Specific Absorption Rate (SAR) in artificial model of human head, Phantom. Thus, current approach applied to biological molecules and electrolytes might be considered as complement to evaluate safety of irradiating sources on biological matter at molecular level.

  19. Análisis mecánico por elementos finitos de una antena UHF en la órbita de Marte

    OpenAIRE

    Moreno García, Carlos

    2015-01-01

    El proyecto desarrolla el diseño mecánico de una antena helicoidal en banda UHF que será parte de un satélite cuyo destino final será Marte. Los principales objetivos de la misión son: Buscar trazas o evidencia de metano y otros gases atmosféricos que podrían manifestar signos de procesos biológicos o geológicos activos, es decir, buscar indicios de vida pasada en Marte Poner a prueba la tecnología necesaria para posteriores misiones europeas a Marte. El proyecto se centrará en la...

  20. Time-dependent resonant UHF CI approach for the photo-induced dynamics of the multi-electron system confined in 2D QD

    Energy Technology Data Exchange (ETDEWEB)

    Okunishi, Takuma; Clark, Richard; Takeda, Kyozaburo [Waseda University, Tokyo 169-8555 (Japan); Kusakabe, Kouichi [Osaka University, Osaka 560-8531 (Japan); Tomita, Norikazu [Yamagata University, Yamagata 960-8560 (Japan)

    2013-12-04

    We extend the static multi-reference description (resonant UHF) to the dynamic system in order to include the correlation effect over time, and simplify the TD Schrödinger equation (TD-CI) into a time-developed rate equation where the TD external field Ĥ′(t) is then incorporated directly in the Hamiltonian without any approximations. We apply this TD-CI method to the two-electron ground state of a 2D quantum dot (QD) under photon injection and study the resulting two-electron Rabi oscillation.

  1. Des monastères aux funérailles. La construction d’une relation ethnographique avec des chrétiennes de Damas (Syrie

    Directory of Open Access Journals (Sweden)

    Anna Poujeau

    2009-03-01

    Full Text Available Des monastères aux funérailles. La construction d’une relation ethnographique avec des chrétiennes de Damas (Syrie. En juillet 2004, j’ai assisté aux funérailles d’un jeune homme de la famille au sein de laquelle je vivais à Damas. À l’époque, l’intense émotion suscitée par cet événement empêcha que je m’y intéresse de plus près. Ce n’est que deux ans plus tard, en juillet 2006, que j’ai décidé d’enquêter sur l’un des aspects majeurs de la cérémonie : les lamentations funèbres féminines. Lors de ce dernier terrain, les femmes de la famille que j’interrogeais, que j’accompagnais aux funérailles et dont j’enregistrais les chants m’assignèrent alors une place tout à fait particulière. Puisque, moi aussi, « je m’habillais en noir et je venais aux funérailles », je ne pouvais plus être considérée comme une étrangère. Dès lors, elles firent de moi la fille d’une de leur sœur émigrée à Paris et mariée avec un Français. Ce statut me fut par ailleurs confirmé lorsqu’elles m’attribuèrent une place dans leurs plaisanteries entre sœurs, tantes et neveux matrilatéraux.Dans cet article, je souhaite engager une double réflexion : sur la position et l’implication de l’ethnologue sur un terrain où l’émotion est au premier plan, ainsi que sur la façon dont être assignée à une place dans la parenté de ses informateurs donne enfin toute liberté d’action à l’ethnologue sur son terrain.From monasteries to funerals. The construction of ethnographical relations with the Christians of Damascus (Syria. In July 2004, I attended the funeral of a young man from the family with whom I was staying in Damascus. At the time, the intense emotion provoked by that event prevented me from immediately examining it more closely. It was only two years later, in July 2006, that I decided to study one of the main features of the ceremony: the women’s lamentations. During this

  2. A fully integrated UHF RFID reader SoC for handheld applications in the 0.18 μm CMOS process

    International Nuclear Information System (INIS)

    Wang Jingchao; Zhang Chun; Wang Zhihua

    2010-01-01

    A low cost fully integrated single-chip UHF radio frequency identification (RFID) reader SoC for short distance handheld applications is presented. The SoC integrates all building blocks-including an RF transceiver, a PLL frequency synthesizer, a digital baseband and an MCU-in a 0.18 μm CMOS process. A high-linearity RX front-end is designed to handle the large self-interferer. A class-E power amplifier with high power efficiency is also integrated to fulfill the function of a UHF passive RFID reader. The measured maximum output power of the transmitter is 20.28 dBm and the measured receiver sensitivity is -60 dBm. The digital baseband including MCU core consumes 3.91 mW with a clock of 10 MHz and the analog part including power amplifier consumes 368.4 mW. The chip has a die area of 5.1 x 3.8 mm 2 including pads. (semiconductor integrated circuits)

  3. A fully integrated UHF RFID reader SoC for handheld applications in the 0.18 {mu}m CMOS process

    Energy Technology Data Exchange (ETDEWEB)

    Wang Jingchao; Zhang Chun; Wang Zhihua, E-mail: wangjc@gmail.co [Institute of Microelectronics, Tsinghua University, Beijing 100084 (China)

    2010-08-15

    A low cost fully integrated single-chip UHF radio frequency identification (RFID) reader SoC for short distance handheld applications is presented. The SoC integrates all building blocks-including an RF transceiver, a PLL frequency synthesizer, a digital baseband and an MCU-in a 0.18 {mu}m CMOS process. A high-linearity RX front-end is designed to handle the large self-interferer. A class-E power amplifier with high power efficiency is also integrated to fulfill the function of a UHF passive RFID reader. The measured maximum output power of the transmitter is 20.28 dBm and the measured receiver sensitivity is -60 dBm. The digital baseband including MCU core consumes 3.91 mW with a clock of 10 MHz and the analog part including power amplifier consumes 368.4 mW. The chip has a die area of 5.1 x 3.8 mm{sup 2} including pads. (semiconductor integrated circuits)

  4. A Tower-based Prototype VHF/UHF Radar for Subsurface Sensing: System Description and Data Inversion Results

    Science.gov (United States)

    Moghaddam, Mahta; Pierce, Leland; Tabatabaeenejad, Alireza; Rodriguez, Ernesto

    2005-01-01

    Knowledge of subsurface characteristics such as permittivity variations and layering structure could provide a breakthrough in many terrestrial and planetary science disciplines. For Earth science, knowledge of subsurface and subcanopy soil moisture layers can enable the estimation of vertical flow in the soil column linking surface hydrologic processes with that in the subsurface. For planetary science, determining the existence of subsurface water and ice is regarded as one of the most critical information needs for the study of the origins of the solar system. The subsurface in general can be described as several near-parallel layers with rough interfaces. Each homogenous rough layer can be defined by its average thickness, permittivity, and rms interface roughness assuming a known surface spectral distribution. As the number and depth of layers increase, the number of measurements needed to invert for the layer unknowns also increases, and deeper penetration capability would be required. To nondestructively calculate the characteristics of the rough layers, a multifrequency polarimetric radar backscattering approach can be used. One such system is that we have developed for data prototyping of the Microwave Observatory of Subcanopy and Subsurface (MOSS) mission concept. A tower-mounted radar makes backscattering measurements at VHF, UHF, and L-band frequencies. The radar is a pulsed CW system, which uses the same wideband antenna to transmit and receive the signals at all three frequencies. To focus the beam at various incidence angles within the beamwidth of the antenna, the tower is moved vertically and measurements made at each position. The signals are coherently summed to achieve focusing and image formation in the subsurface. This requires an estimate of wave velocity profiles. To solve the inverse scattering problem for subsurface velocity profile simultaneously with radar focusing, we use an iterative technique based on a forward numerical solution of

  5. Utilisation of the buffy coat technique and an antibody-detection ELISA as tools for assessing the impact of trypanosomosis on health and productivity of N'Dama cattle

    International Nuclear Information System (INIS)

    Faye, J.A.; Mattioli, R.C.

    2000-01-01

    The buffy coat technique (BCT), a parasitological test, and an indirect antibody ELISA (Ab-ELISA) were used to detect trypanosome infections in blood and serum samples, respectively, collected on N'Dama cattle exposed to natural high tsetse challenge. These two diagnostic tools were also utilized to assess trypanosomal status in sequentially collected blood and serum samples from two groups composed of 5 N'Dama cattle each experimentally challenged with Trypanosoma congolense and T. vivax, In both studies, packed red cell volume (PCV) and live weight were measured. The specificity of the Ab-ELISA was computed by testing approximately 70 serum samples obtained from a cattle population kept under zero tsetse challenge. The specificity was found to be 95.8% for T. vivax and 97. 1 % for T. congolense. In the field study, 3.9% (12/310) of blood samples was parasitologically positive. In corresponding serum samples the prevalence of positive trypanosome sero-reactors was 54.8% (170/310). However, antibodies against trypanosomes persisted in serum when blood samples were no longer parasitologically positive. In both blood and serum samples, T. vivax was found to be the main infecting species. The sensitivity of the Ab-ELISA for T. vivax was 81.8%. Due to the extremely low numbers of T. congolense infection (only one), as detected by BCT, the sensitivity for that trypanosome species was not computed. In the experimentally challenged cattle, 80% (24/30) and 33.3% (10/30) of blood samples were BCT positive for T. congolense and T. vivax, respectively. Antibodies in corresponding sera were present in 69% (20/29) and 96.3% (26/27) of animals challenged with T. congolense and T. vivax, respectively. The serological assay for T. congolense antibody detection exhibited high cross-reactivity with T. vivax antigens, as assessed in sera collected from T. vivax infected animals. In the field study, cattle showing the presence of antibodies against T. congolense and/or T. vivax had

  6. State of immune system of patients with infectious-allergic asthma subjected to transcerebral exposure to UHF electron field (27, 12 MHz)

    Energy Technology Data Exchange (ETDEWEB)

    Bogolyubov, V.M.; Malyavin, A.G.; Pershin, S.B.; Shubina, A.V.; Kubli, S.Kh.; Myshelova, K.P.

    An attempt was made to affect immunologic reactions in infectious-allergic asthma patients by subjecting them to transcerebral exposure to UHF electric field. Seventy-six patients, aged 23 to 69 years with varying duration of the disease, were studied. The treatment consisted of 25 exposures lasting from 5 to 15 min; a sham exposure was used on ten patients serving as controls. In all, 55/66 patients experienced clinical improvement lasting 6 to 12 months; only 2/10 control patients had any improvement. After the exposure, the level of T-lymphocytes increased along with blood histamine level; no significant changes were observed in case of B-lymphocytes. This immunologic correction was most effective in patients with atopy, with decreased levels of T-lymphocytes and elevated levels of B-lymphocytes. 12 references.

  7. Ionospheric modification induced by high-power HF transmitters: a potential for extended range VHF--UHF communications and plasma physics research

    International Nuclear Information System (INIS)

    Utlaut, W.F.

    1975-01-01

    When the ionized upper atmosphere of the earth is illuminated by high-power HF radio waves at appropriate frequencies, the temperature of electrons in the ionosphere can be raised substantially. In addition, radio waves with sufficient energy cause parametric instabilities that generate a spectrum of intense plasma waves. Observations of these phenomena have produced new understanding of plasma processes. One consequence of heating and plasma wave generation is that irregularities are formed in the electron distribution which are aligned with the earth's magnetic field. Because of this, a scatterer of large radar cross section is produced, which scatters HF through UHF communication signals over long distance paths, that would not otherwise be normally possible by ionospheric means. Results of radio, radar, communication, and photometric experiments that explored the characteristics of the volume of ionosphere which has been intentionally modified, temporarily, above facilities near Boulder (Platteville), Colo., and at Arecibo, Puerto Rico are summarized

  8. Brush-Painting and Photonic Sintering of Copper Oxide and Silver Inks on Wood and Cardboard Substrates to Form Antennas for UHF RFID Tags

    Directory of Open Access Journals (Sweden)

    Erja Sipilä

    2016-01-01

    Full Text Available Additive deposition of inks with metallic inclusions provides compelling means to embed electronics into versatile structures. The need to integrate electronics into environmentally friendly components and structures increases dramatically together with the increasing popularity of the Internet of Things. We demonstrate a novel brush-painting method for depositing copper oxide and silver inks directly on wood and cardboard substrates and discuss the optimization of the photonic sintering process parameters for both materials. The optimized parameters were utilized to manufacture passive ultra high frequency (UHF radio frequency identification (RFID tag antennas. The results from wireless testing show that the RFID tags based on the copper oxide and silver ink antennas on wood substrate are readable from ranges of 8.5 and 11 meters, respectively, and on cardboard substrate from read ranges of 8.5 and 12 meters, respectively. These results are well sufficient for many future wireless applications requiring remote identification with RFID.

  9. Study of the coastal atmospheric boundary layer during ESCOMPTE 2001. Evaluation and improvement of the efficiency of a UHF radar; Etude de la couche limite atmospherique cotiere durant ESCOMPTE 2001. Evaluation et amelioration des performances d'un radar UHF

    Energy Technology Data Exchange (ETDEWEB)

    Puygrenier, V.

    2005-12-15

    Forecasting of pollution events was the main objective of the ESCOMPTE-2001 campaign, which took place in the Marseille/Fos/Berre heterogeneous area (southeastern France) in the early summer 2001. This goal requires good understanding and taking into account, by physico-chemical numerical models, of the physical processes in the Atmospheric Boundary Layer (ABL), in which pollutants are emitted, transported and diffused. In the ESCOMPTE-2001 campaign context, this work was devoted to study the low troposphere during sea breeze events, related to meteorological conditions responsible for poor air quality of coastal areas. It presents notably an oscillation of the sea breeze intensity and competitions of locals and regional sea breeze, which change the advective time of the marine air above the continental surface and thus influence the ABL development and its pollutants concentration. This study is based principally on the network of four UHF wind profilers radars set up on the coastal area of Marseille/Fos/Berre, allowing a continuous three-dimensional description of the sea breeze flow and the ABL. For the needs of this phenomenological work, methodological developments was realized to improve the measurement of ABL turbulent properties with UHF radars (terms of turbulent kinetic energy budget) and the use of wind profilers network for the study of pollutants plumes trajectory-graphy. (author)

  10. La dama fantasma y el monstruo del lago: Narración, ciencia y creencias en actuaciones discursivas A dama fantasma e o monstro do lago: narrativa, ciência e crença em performances discursivas The Lady Ghost and The Loch Monster: narrative, science and beliefs in discursive performances

    Directory of Open Access Journals (Sweden)

    María Inés Palleiro

    2011-12-01

    Full Text Available En este artículo, examino la dinámica entre ficción e historia, ciencia y creencia, en versiones de dos matrices folklóricas de distintas latitudes: la dama fantasma en sus distintos nombres -desde Rufina Cambacères a Frederike von Grotes y Matilde de Canossa- y el monstruo del lago, conocido como el Nahuelito, en una versión local del monstruo de Loch Ness. Trabajo con relatos registrados en contextos diversos y en soportes diferentes, que incluyen los circuitos mediáticos. Examino en ellos la articulación retórica del mensaje, cuyo contenido semántico se relaciona con creencias colectivas, entendidas como enunciados cuyo valor de verdad depende de un acuerdo intersubjetivo. Analizo la dinámica entre el saber experto de las ciencias y la narrativa de creencias, que intenta dar una respuesta totalizadora a problemas tales como la finitud de la vida o el temor a lo desconocido, para los cuales la ciencia canónica no brinda una respuesta satisfactoria.Neste artigo, eu analiso os limites entre a ficção e a história, a ciência e a opinião, em versões orais de versões orais e em recreações virtuais de duas matrizes narrativas: "A dama antasma" em seus nomes diferentes - de Rufina Cambacères a Frederike von Grottes e a Matilde di Canossa- e "O monstro de Loch Ness" conhecido em Argentina como "o Nahuelito". O alvo desta análise é estudar a dinâmica entre conhecimento científico relacionado com episteme, e o saber narrativo relacionado com a e crença. Eu acredito as crenças como expressões modais, consideradas como verdadeiras por meio de um acordo intersubjective. Neste sentido, as aparições espectrais e os monstro do lago podem ser considerados como expressões metaforicas do sobrenatural. De facto, tais criaturas tendem a dar rudimentos explanatórios do sentido simbólico da experiência que a ciência moderna não pode fornecer.This article analyses the boundaries between fiction and history, science and belief, in

  11. Experimental trichinellosis in fallow-deer (Dama dama L.

    Directory of Open Access Journals (Sweden)

    Moretti A.

    2001-06-01

    Full Text Available Herbivora can play a very important role in spreading trichinellosis, as showed by the massive epidemics in man, caused by the consumption of horse meat in the last years. In this context, the present study has been undertaken to verify, through an experimental infection, the susceptibility, together with other biological parameters, of fallow-deer to Trichinella infection. The four animals, 8-9 months of age and 18-25 Kg body weight, were orally infected with low doses of Trichinella britovi and T. pseudospiralis (2,000 larvae/animal. After day 30 p.i,, the animals were necropsied and, using artificial digestion methods, larval burden of Trichinella in muscle tissues was determined. Histopathological, serological (lgG monoclonal blocking ELISA and biochemical data were assessed during the experiment. The results showed the susceptibility of fallow-deer to T. britovi and T. pseudospiralis infection; under the same inoculum size, the number of larvae/g was higher in group infected with T. britovi. The animals showed a higher immunological response to T. pseudospiralis infection. The results are discussed.

  12. A passive UHF RFID tag chip with a dual-resolution temperature sensor in a 0.18 μm standard CMOS process

    International Nuclear Information System (INIS)

    Feng Peng; Zhang Qi; Wu Nanjian

    2011-01-01

    This paper presents a passive EPC Gen-2 UHF RFID tag chip with a dual-resolution temperature sensor. The chip tag integrates a temperature sensor, an RF/analog front-end circuit, an NVM memory and a digital baseband in a standard CMOS process. The sensor with a low power sigma—delta (ΣΔ) ADC is designed to operate in low and high resolution modes. It can not only achieve the target accuracy but also reduce the power consumption and the sensing time. A CMOS-only RF rectifier and a single-poly non-volatile memory (NVM) are designed to realize a low cost tag chip. The 192-bit-NVM tag chip with an area of 1 mm 2 is implemented in a 0.18-μm standard CMOS process. The sensitivity of the tag is −10.7 dBm/−8.4 dBm when the sensor is disabled/enabled. It achieves a maximum reading/sensing distance of 4 m/3.1 m at 2 W EIRP. The inaccuracy of the sensor is −0.6 °C/0.5 °C (−1.0 °C/1.2 °C) in the operating range from 5 to 15 °C in high resolution mode (−30 to 50 °C in low resolution mode). The resolution of the sensor achieves 0.02 °C (0.18 °C) in high (low) resolution mode. (semiconductor integrated circuits)

  13. Investigation of inertia-gravity waves in the upper troposphere/lower stratosphere over Northern Germany observed with collocated VHF/UHF radars

    Directory of Open Access Journals (Sweden)

    A. Serafimovich

    2005-01-01

    Full Text Available A case study to investigate the properties of inertia-gravity waves in the upper troposphere/lower stratosphere has been carried out over Northern Germany during the occurrence of an upper tropospheric jet in connection with a poleward Rossby wave breaking event from 17-19 December 1999. The investigations are based on the evaluation of continuous radar measurements with the OSWIN VHF radar at Kühlungsborn (54.1 N, 11.8 E and the 482 MHz UHF wind profiler at Lindenberg (52.2 N, 14.1 E. Both radars are separated by about 265 km. Based on wavelet transformations of both data sets, the dominant vertical wavelengths of about 2-4 km for fixed times as well as the dominant observed periods of about 11 h and weaker oscillations with periods of  6 h for the altitude range between 5 and 8 km are comparable. Gravity wave parameters have been estimated at both locations separately and by a complex cross-spectral analysis of the data of both radars. The results show the appearance of dominating inertia-gravity waves with characteristic horizontal wavelengths of  300 km moving in the opposite direction than the mean background wind and a secondary less pronounced wave with a horizontal wavelength in the order of about 200 km moving with the wind. Temporal and spatial differences of the observed waves are discussed.

  14. Orientations pour l'intégration des TICE dans l'enseignement du français en Syrie. L'exemple du centre de documentation pédagogique de Damas.

    Directory of Open Access Journals (Sweden)

    Christelle Demange-Ducrot

    2005-09-01

    Full Text Available Le secteur éducatif syrien souhaite orienter son action vers les nouvelles technologies de l'information et la sensibilisation du public scolaire aux applications de l'informatique dans le domaine éducatif et en particulier dans le cadre de l'enseignement des langues. Dans l'enseignement-apprentissage des langues, les apports des TICE sont nombreux, mais là où elles apportent sans doute la plus grande plus-value, c'est lors de la mise en place de projets de classe motivants et valorisants, intégrés à des projets de communication authentique. Partant de ce constat, le Centre de Documentation Pédagogique de Damas forme les enseignants de français syriens à l'intégration des TICE dans des projets pédagogiques de classe mettant en œuvre des activités créatives et stimulantes pour communiquer en français. Jusqu'alors, les formations ont centré leurs efforts sur les bases de l'environnement informatique et de la bureautique, avec pour parti pris l'utilisation de logiciels libres. L'année 2005 marquera le lancement et l'expérimentation du dispositif de formation continue à distance destiné aux professeurs de français dans le domaine des TICE.

  15. Regards sur un grand chantier ayyoubide: les portes de la citadelle de Damas. L’apport de l’étude archéologique des élévations

    Directory of Open Access Journals (Sweden)

    Hartmann-Virnich, Andreas

    2005-12-01

    Full Text Available The author’s research on the gates of the citadel of Damascus give an exemplary insight into the approach of the architectural project by thorough archaeological analysis of the masonries and the relative chronology of the successive states of one of the major monuments of mediaeval military architecture in the Near East. Erected at the end of the 11th century AD, frequently modified and finally rebuilt at the beginning of the 13th century AD by the Ayyoubid sultan Al-’Adil who enshrined the older building in a much larger fortress, the citadel, residence of a prince as well as castle of exceptional size and strength, offers a great variety of aspects for the study of building techniques and the organization of the building process, which deepen the knowledge of the evolution of the concept of Islamic castle building during the crusades.Les recherches de l’auteur sur les portes de la citadelle de Damas offrent un exemple pour l’approche du projet architectural par l’étude archéologique fine des élévations et de la chronologie relative des états d’un des monuments majeurs de l’architecture militaire du Proche-Orient médiéval. Construite à la fin du XIe siècle, modifiée à de nombreuses reprises et enfin rebâtie entièrement par l’ajout d’une nouvelle enceinte plus large sous le souverain ayyoubide Al-’Adil, la citadelle, résidence princière et forteresse de grande envergure, permet d’étudier en détail les techniques et l’organisation de la construction et d’approfondir la connaissance de l’évolution de la conception de la fortification islamique du temps des croisades.

  16. Evaluación de la eficacia in vitro e in vivo del tratamiento antimicrobiano combinado por el tablero de damas Effectiveness of a combined antimicrobial treatment by means of the draughtboard. In vitro and in vivo assessment

    Directory of Open Access Journals (Sweden)

    María Espino Hernández

    2009-08-01

    Full Text Available El presente trabajo tuvo como objetivo, evaluar la eficacia clínica del tratamiento antimicrobiano combinado mediante pruebas de sinergismo in vitro y determinar la eficacia del procedimiento empleado para orientar la aplicación de estas formas de tratamiento en el paciente con sepsis por bacterias con resistencia variada. Se evaluó el tratamiento aplicado a 163 recién nacidos con sepsis corroborada por hemocultivo positivo en el Hospital Ginecobstétrico Universitario "América Arias", durante el periodo de enero de 1993 a diciembre de 2000, por el método tablero de damas (checkerboard en placas de microtitulación. Las combinaciones de fármacos sinérgicas in vitro presentaron una alta probabilidad de eficacia clínica, independiente del patrón de susceptibilidad del microorganismo aun frente a cepas resistentes a los 2 antimicrobianos utilizados en el tratamiento. Todos los resultados antagónicos in vitro se correspondieron con un fallo clínico terapéutico. El procedimiento utilizado puede constituir una valiosa herramienta para orientar la terapéutica en pacientes con sepsis por microorganismos resistentes.The aim of present paper was to evaluate clinical effectiveness of combined antimicrobial treatment by means of in vitro synergism tests and to determine effectiveness of used procedure to direct applications of these treatment strategies in patient presenting with sepsis from varied resistance bacteria. Treatment applied was assessed in 163 newborn patients presenting with sepsis from positive hemoculture in "America Arias" University Gynecology-Obstetrics Hospital from January 1993 to December 2000, by checkerboard method in microtritate plates. In vitro synergic drug combinations showed a high probability of clinical effectiveness, independently of susceptibility pattern of microorganism event versus resistant strains to both antimicrobials used in treatment. All in vitro antagonistic results correspond both with a

  17. "Muza - dama neverojatno kapriznaja" / Irina Butjajeva

    Index Scriptorium Estoniae

    Butjajeva, Irina

    2004-01-01

    Vene Draamateatri galerii korraldatud Mihhail Duhhomjonoki skulptuuride ja Valeri Bareta fotode ühisnäitus "Naabrid" Tallinna juveelikeskuses Bindes. Duhhomjonoki uued tööd jõuavad tehnilistel põhjustel galeriisse kahe nädala pärast. Skulptoriga tema loomingust ja loomeprotsessist

  18. "Pikovaja dama" rabotõ Benua

    Index Scriptorium Estoniae

    2006-01-01

    Näitusest "A. S. Pushkin. Padaemand illustratsioonides" Narva kunstigaleriis. Näha A. Benois ja V. Shuhhajevi illustratsioonide reprosid. Originaale hoitakse Ülevenemaalises Pushkini muuseumis Peterburis. Kunstnikest

  19. "Dama s sobatshkoi" v Monokle / Svetlana Jantshek

    Index Scriptorium Estoniae

    Jantshek, Svetlana

    1999-01-01

    Peterburi rahvusvahelisel mononäidendite festivalil "Monokkel 1999" käis ka Vene Draamateatri trupp lavastusega "Daam koerakesega" A. Tšehhovi jutustuse järgi. Etenduse tõid lavale lavastaja Eduard Toman, kunstnik Vladimir Anshon ja osatäitja Nikolai Hrustaljov. Lavastus ja kunstnikutöö märgiti ära eripreemiaga

  20. Precision Strike Technology Symposium (PSTS 09)

    Science.gov (United States)

    2009-10-29

    Control System) AUR (All-Up-Round) UHF SATCOM GPS JIC Threat and Target Data NGA Mapping, Charting & Geodesy 5 0 IRAQ SAU DI AR ABIA OM AN EM IRA TES JO...d M il it ary Ci ty Abu Dhabi qom Ahraz Shiraz Esfahan Yaz d Kerman Rafha 5 0 IRAQ SAU DI AR ABIA OM AN EM IRA TES JO RDAN SYRIA PAKI ST AN

  1. Quality traits of fallow deer (Dama dama dry-cured hams

    Directory of Open Access Journals (Sweden)

    E. Piasentier

    2011-03-01

    Full Text Available Meat processing by drying, after salting or fermentation and before a long ripening period, is an ancient and widespread process, used to preserve meat from spoilage. Among the wide variety of dry meat products made in Europe, the most famous ones are made from pork (Italian and Spanish dry-cured hams, fermented sausages, but other interesting products are obtained from meat of different species: i.e., the “bresaola”, from bovine, horse, goat, etc. (Paleari et al., 2002. Deer meat and meat products are interesting in this picture, since they include the high degree of consumers’ appreciation for dried products and considering the growing interest for food obtained by natural husbandry and technology...

  2. The fallow deer (dama dama) protection against parasites in the ecological meat breeding

    OpenAIRE

    JANUSZ KILAR; MARIA RUDA

    2014-01-01

    The aim of this study was to define the efficiency of Valbazen 10% against the parasites at the fallow deers bred on the ecological farm. The efficiency of Valbazen 10% for Eimeria spp, Bunostomum spp, Cooperia spp, Oesophagostomum spp, Toxocara vitulorum were found. The risk of Protostrongylus spp. decreased. The Valbazen 10% did not protect fallow deers from Trichostrongylus spp.

  3. Passive UHF RFID Tag for Multispectral Assessment

    Directory of Open Access Journals (Sweden)

    Pablo Escobedo

    2016-07-01

    Full Text Available This work presents the design, fabrication, and characterization of a passive printed radiofrequency identification tag in the ultra-high-frequency band with multiple optical sensing capabilities. This tag includes five photodiodes to cover a wide spectral range from near-infrared to visible and ultraviolet spectral regions. The tag antenna and circuit connections have been screen-printed on a flexible polymeric substrate. An ultra-low-power microcontroller-based switch has been included to measure the five magnitudes issuing from the optical sensors, providing a spectral fingerprint of the incident electromagnetic radiation from ultraviolet to infrared, without requiring energy from a battery. The normalization procedure has been designed applying illuminants, and the entire system was tested by measuring cards from a colour chart and sensing fruit ripening.

  4. Signals from dark Universe: DAMA/LIBRA at LNGS

    Indian Academy of Sciences (India)

    cycles of the model-independent DM annual modulation signature (exposure .... as well; thus, cautious upper limits (90% CL) on the possible contributions to the .... Noise. Efficient rejection. < 10−4 cpd/kg/keV. Energy scale Routine + intrinsic ...

  5. [Statin associated myopathy in clinical practice. Results of DAMA study].

    Science.gov (United States)

    Millán, Jesús; Pedro-Botet, Juan; Climent, Elisenda; Millán, Joaquín; Rius, Joan

    Muscle symptoms, with or without elevation of creatin kinase are one of the main adverse effects of statin therapy, a fact that sometimes limits their use. The aim of this study was to evaluate the clinical characteristics of patients treated with statins who have complained muscle symptoms and to identify possible predictive factors. A cross-sectional one-visit, non-interventional, national multicenter study including patients of both sexes over 18 years of age referred for past or present muscle symptoms associated with statin therapy was conducted. 3,845 patients were recruited from a one-day record from 2,001 physicians. Myalgia was present in 78.2% of patients included in the study, myositis in 19.3%, and rhabdomyolysis in 2.5%. Patients reported muscle pain in 77.5% of statin-treated individuals, general weakness 42.7%, and cramps 28.1%. Kidney failure, intense physical exercise, alcohol consumption (>30g/d in men and 20g/d in women) and abdominal obesity were the clinical situations associated with statin myopathy. Myalgia followed by myositis are the most frequent statin-related side effects. It should be recommended control environmental factors such as intense exercise and alcohol intake as well as abdominal obesity and renal function of the patient treated with statins. Copyright © 2016 Sociedad Española de Arteriosclerosis. Publicado por Elsevier España, S.L.U. All rights reserved.

  6. German, Pikovaja dama i jejo alter ego / Ksenia Repson

    Index Scriptorium Estoniae

    Repson, Ksenia

    2007-01-01

    Moskva Vahtangovi nim. Teatri näitlejad Ludmilla Maksakova, Jevgeni Knjazev ja Julia Rutberg räägivad Pjotr Fomenko "Padaemanda" lavastusest, mis etendub Tallinnas festivali "Kuldne mask Eestis" raames

  7. "Dama s sobatshkoi", "Stshastlivõi prints" i "Svidetel obvinenija"

    Index Scriptorium Estoniae

    2004-01-01

    25.-30. maini toimuvad Vene Draamateatris Moskva Noorsooteatri külalisetendused, esitatakse K. Ginkase lavastuses A. Tšehhovi "Daam koerakesega" ja O. Wilde'i "Õnnelik prints" ning H. Janovskaja lavastuses "Süüdistuse tunnistaja"

  8. Las damas de Shanghai. Doris Lessing visita a Elizabeth Costello

    Directory of Open Access Journals (Sweden)

    Izaguirre, Marian

    2009-06-01

    Full Text Available África. El ancestral país de los zimbabwe. una granja de tres mil acres. Lo primero que existe son las paredes de barro y los techos de paja que se levantan provisionalmente y que luego se convierten en un hogar que hay que rehacer cada año después de las lluvias torrenciales. una niña deambula por las selvas y sabanas, sola con su fusil y un perro. Y luego esa niña se convierte en la joven oficinista de un bufete de abogados de Salisbury. El mundo de los colonos blancos. Vienen después el marxismo y los matrimonios fallidos. Y más tarde la huida a Europa. Inglaterra. Dos baúles, un hijo y 150 libras. El feminismo y la lucha política. La vida es como esa granja de Zimbabwe que hay que reconstruir cada año. La mujer de accidentada vida que nació en Persia y vivió en África se convierte en una escritora reconocida. Viaja. Asiste a congresos. Lucha para erradicar las desigualdades, es enérgica, vehemente, incansable. Ahora es una mujer de ochenta y ocho años que cuida de su hijo Peter y que combate (todavía en diferentes lizas: la ecología, la defensa de los animales, la lucha contra las guerras, las invasiones… Y se enfrenta a todo (incluso al terrible esfuerzo que trae consigo la concesión del Premio nobel con una vehemencia lúcida, la que produce haber entrado y salido con pasión y coherencia de los grandes ismos del siglo xx.

  9. Sarcocystis spp. in red deer (Cervus elaphus, fallow deer (Dama dama, and pudu (Pudu pudu in southern Chile

    Directory of Open Access Journals (Sweden)

    Esteban Reyes Lobão-Tello

    Full Text Available ABSTRACT: Worldwinde, cervids are considered an important source of infection and dissemination of a wide variety of pathogens, both for farm animals and humans. Among this diseases is sarcosporidiosis, which is a parasitic disease caused by Sarcocystis spp. (Protozoa: Apicomplexa. Most frequent clinical signs are hemolytic anemia, weakness, weight loss and decrease of growth and some species of Sarcocystis might cause abortions. The clinical disease in ruminants is fairly rare but the infection is very frequent. Infections are accumulative and the parasite does not generate immunity in any of the hosts. Ovine sarcosporidiosis is a serious issue in the some regions of Chile due to the macrocysts located in the muscle which means condemnation of the whole carcass. Sarcocystis spp. has been widely reported in red deer and other cervid species but in Chile the situation remains unknown. Nowadays there is little to no evidence of Sarcocystis in foreign deer in Chile and there is only one report of the parasite on pudu. The main goal of this study is to demonstrate the presence of Sarcocystis spp. in myocardium of red deer and fallow deer in Chile, and confirm the presence of Sarcocystis spp. in pudu. All cervid cases from 1994 to 2013 of the Institute of Animal Pathology of the Universidad Austral de Chile were reviewed. The animals selected were those in which a myocardium sample was taken. From the histopathological samples observed, it was found that 5 of the 9 red deer, 1 of the 4 fallow deer and in 11 of the 23 pudu there were Sarcocystis cysts in the myocardium. This study represents the first record for Chile of Sarcocystis spp. in myocardium of red deer and fallow deer. Stablishing the red deer, fallow deer and pudu as hosts of Sarcocystis aids to have a better understanding of the parasite epidemiology in Chile and the role of wild and captive cervids in the maintenance and spread of these parasites.

  10. A luta entre a Dama de Negro e a Dama de Branco: cuidados de Enfermagem na terminalidade

    Directory of Open Access Journals (Sweden)

    Luã Gianine Moreira

    2016-07-01

    Full Text Available Trata-se de um estudo baseado no relato de experiência da percepção do acadêmico de enfermagem sobre os cuidados paliativos e terminalidade. Os objetivos foram relatar os conflitos vivenciados pelo autor deste estudo frente ao cuidado paliativo com um familiar e paciente oncológico; Descrever as contribuições deste cuidado para a família e paciente diante do sofrimento, tratamento da dor, alívio dos sintomas, apoio emocional e social; Descrever os dilemas vivenciados pelo autor diante da terminalidade do seu ente querido. O estudo utilizou um método qualitativo, descritivo, dividido em etapas: levantamento de referências bibliográficas com o propósito de embasar e nortear o relato a ser desenvolvido, contextualizando a experiência com as Teorias do Cuidado Humano de Jean Watson e Cecília Saunders, seguido de uma análise interpretativa do autor diante dos cuidados paliativos oferecidos ao seu familiar. Durante esta vivência, o autor enfrentou fatores que modificaram suas percepções do cuidado paliativo, incluindo a peregrinação em busca de respostas, turbulências e conflitos familiares referentes ao prognóstico médico e dificuldades de se tornar alicerce para os familiares em relação ao suporte emocional, socioeconômico e espiritual na reconstrução de paradigmas, repensando assim a terminalidade. Este estudo possibilitou um olhar diferenciado sobre a terminalidade e a existência da subjetividade presentes no processo morte-morrer, vinculado a humanização da assistência prestada.

  11. Dental Defects as a Potential Indicator of Chronic Malnutrition in a Population of Fallow Deer (Dama dama) from Northwestern Germany.

    Science.gov (United States)

    Kierdorf, Horst; Filevych, Olexander; Lutz, Walburga; Kierdorf, Uwe

    2016-10-01

    We studied enamel defects in mandibular cheek teeth of fallow deer from an enclosed population that had grown far beyond the carrying capacity of its habitat. Macroscopic inspection revealed a high frequency of pathological enamel alterations in the permanent premolars and the third molar, which form late during dental development, while earlier forming teeth (deciduous premolars and first molar) were generally not affected. Macroscopic enamel alterations comprised opacity and posteruptive discoloration, loss of occlusal enamel ridges, and presence of enamel surface lesions. Backscattered electron imaging in the SEM revealed a marked hypomineralization and related increased porosity of the outer compared to the central and inner enamel portions in the affected teeth. In contrast, the enamel of the unaffected first molars showed a homogeneous high degree of mineralization. Microindentation hardness testing demonstrated a significantly reduced and highly variable hardness of the outer enamel of the affected teeth. The recorded enamel alterations are indicative of a disturbance of enamel maturation. Based on findings of experimental studies by other authors that explored the effects of dietary deficiencies on the mineralization of dental hard tissues in different mammal species, we suggest a dietary calcium deficiency as the cause of the observed pathological enamel changes in the fallow deer. The supposed calcium deficiency only affected teeth whose crown mineralization takes place after weaning, while the deciduous premolars and the first molar, whose crown formation occurs prenatally or during the early postnatal period of intense milk feeding, were unaffected. Anat Rec, 299:1409-1423, 2016. © 2016 Wiley Periodicals, Inc. © 2016 Wiley Periodicals, Inc.

  12. B-2 Extremely High Frequency SATCOM and Computer Increment 1 (B-2 EHF Inc 1)

    Science.gov (United States)

    2015-12-01

    Confidence Level Confidence Level of cost estimate for current APB: 55% This APB reflects cost and funding data based on the B-2 EHF Increment I SCP...This cost estimate was quantified at the Mean (~55%) confidence level . Total Quantity Quantity SAR Baseline Production Estimate Current APB...Production Estimate Econ Qty Sch Eng Est Oth Spt Total 33.624 -0.350 1.381 0.375 0.000 -6.075 0.000 -0.620 -5.289 28.335 Current SAR Baseline to Current

  13. SATCOM Supply Versus Demand and the Impact on Remotely Piloted Aircraft ISR

    Science.gov (United States)

    2016-03-01

    General, Informational Pamphlet , “Far More than Satellite Bandwidth,” http://www.intelsatgeneral.com/ (accessed 9 Dec 2015). 13 Forest, Benjamin, “An...business/where-we-operate.html 16 Eultelsat, “Facts and Figures” Brochure , http://www.eutelsat.com/en/group/our-business/what-we-do.html 17 Air Combat...Primer, Chapter 14. Eultelsat, “Facts and Figures” Brochure , http://www.eutelsat.com/en/group/our-business/what- we-do.html. Eultelsat, “Our

  14. Sistema de adquisición de datos para la medición de parámetros radioeléctricos en antenas lineales en la banda de TV de VHF y UHF System of acquisition of information for measurement of radioelectric parameters in linear antennas in the band of VHF and UHF’s television

    Directory of Open Access Journals (Sweden)

    María del Pilar Celemín

    2007-06-01

    Full Text Available Este proyecto desarrolla un sistema de adquisición y procesamiento de datos para la medición y ajuste de parámetros radioeléctricos de antenas lineales en las bandas de VHF y UHF. Como señal de prueba se utilizan algunas de las señales de televisión que se encuentran en el espectro radioeléctrico, provenientes de los transmisores que radian señales de canales nacionales. El receptor implementado incluye un sintonizador comercial de televisión que toma como muestra la señal portadora de video. Esta señal es amplificada, filtrada, almacenada y acondicionada, para ser leída por el puerto serial de un computador personal y procesada empleando un programa en Visual Basic, con una interfaz gráfica que permite una interacción amigable con el usuario. Desde acá se interactúa con un microcontrolador que controla el mecanismo de posicionamiento de la antena receptora por medio de una estructura electromecánica, que le permite ejecutar movimientos en dos grados de libertad: en azimut y en elevación. Con esto se logra un sistema capaz de determinar automáticamente el apuntamiento óptimo de la antena de acuerdo al máximo nivel de recepción de señal. Así mismo, se determinan parámetros propios de la antena tales como: el patrón de radiación (tanto en el plano horizontal como vertical, la ganancia directiva de la antena, la ganancia en cada uno de los puntos que conforman el plano principal, y otros parámetros de interés para el análisis de las características reales de antenas lineales.This project develops a data acquisition and processing system for measuring and adjusting lineal-antenna radioelectric parameters in VHF and UHF. Television signals are used as test signal. They can be found in radio electric spectrum, as they come from commercial transmitters that broadcast signals of national channels. The achieved receptor includes a television commercial tuner for obtaining video signal. Later, this signal is conditioning to

  15. Experimental study of energy harvesting in UHF band

    International Nuclear Information System (INIS)

    Bernacki, Ł; Gozdur, R; Salamon, N

    2016-01-01

    A huge progress of down-sizing technology together with trend of decreasing power consumption and, on the other hand, increasing efficiency of electronics give the opportunity to design and to implement the energy harvesters as main power sources. This paper refers to the energy that can be harvested from electromagnetic field in the unlicensed frequency bands. The paper contains description of the most popular techniques and transducers that can be applied in energy harvesting domain. The overview of current research and commercial solutions was performed for bands in ultra-high frequency range, which are unlicensed and where transmission is not limited by administrative arrangements. During the experiments with Powercast’s receiver, the same bands as sources of electromagnetic field were taken into account. This power source is used for conducting radio-communication process and excess energy could be used for powering the extra electronic circuits. The paper presents elaborated prototype of energy harvesting system and the measurements of power harvested in ultra-high frequency range. The evaluation of RF energy harvesters for powering ultra-low power (ULP) electronic devices was performed based on survey and results of the experiments. (paper)

  16. Characteristics of ionospheric irregularities causing scintillations at VHF/UHF

    International Nuclear Information System (INIS)

    Vats, H.O.; Deshpande, M.R.; Rastogi, R.G.

    1978-01-01

    Some properties of ionization irregularities using amplitude scintillation records of radio beacons from ATS-6 (phase II) at Ootacamund, India have been investigated. For the estimation of scale-size and strength of the irregularities a simple diffraction model has been used which explains only weak and moderate equatorial scintillation observations. It was found that the scale sizes of day time E-region irregularities are smaller than those in the F-region during night time in addition, irregularities are generated initially at large scale sizes which later break up into smaller scale sizes

  17. Passive UHF RFID Tag with Multiple Sensing Capabilities

    Directory of Open Access Journals (Sweden)

    José Fernández-Salmerón

    2015-10-01

    Full Text Available This work presents the design, fabrication, and characterization of a printed radio frequency identification tag in the ultra-high frequency band with multiple sensing capabilities. This passive tag is directly screen printed on a cardboard box with the aim of monitoring the packaging conditions during the different stages of the supply chain. This tag includes a commercial force sensor and a printed opening detector. Hence, the force applied to the package can be measured as well as the opening of the box can be detected. The architecture presented is a passive single-chip RFID tag. An electronic switch has been implemented to be able to measure both sensor magnitudes in the same access without including a microcontroller or battery. Moreover, the chip used here integrates a temperature sensor and, therefore, this tag provides three different parameters in every reading.

  18. Gas Identification Using Passive UHF RFID Sensor Platform

    Directory of Open Access Journals (Sweden)

    Muhammad Ali AKBAR

    2015-11-01

    Full Text Available The concept of passive Radio Frequency Identification (RFID sensor tag is introduced to remove the dependency of current RFID platforms on battery life. In this paper, a gas identification system is presented using passive RFID sensor tag along with the processing unit. The RFID system is compliant to Electronics Product Code Generation 2 (EPC-Gen2 protocol in 902-928 MHz ISM band. Whereas the processing unit is implemented and analyzed in software and hardware platforms. The software platform uses MATLAB, whereas a High Level Synthesis (HLS tool is used to implement the processing unit on a Zynq platform. Moreover, two sets of different gases are used along with Principal Component Analysis (PCA and Linear Discriminant Analysis (LDA based feature reduction approaches to analyze in detail the best feature reduction approach for efficient classification of gas data. It is found that for the first set of gases, 90 % gases are identified using first three principal components, which is 7 % more efficient than LDA. However in terms of hardware overhead, LDA requires 50 % less hardware resources than PCA. The classification results for the second set of gases reveal that 91 % of gas classification is obtained using LDA and first four PCA, while LDA requires 52 % less hardware resources than PCA. The RFID tag used for transmission is implemented in 0.13 µm CMOS process, with simulated average power consumption of 2.6 µW from 1.2 V supply. ThingMagic M6e embedded reader is used for RFID platform implementation. It shows an output power of 31.5 dBm which allows a read range up to 9 meters.

  19. Exploring RSSI Dependency on Height in UHF for throughput optimisation

    CSIR Research Space (South Africa)

    Maliwatu, R

    2016-11-01

    Full Text Available in the area. When raised beyond 8.5 m further signal strength gain stifles, possibly due to effects of multi-path fading. The contribution of this paper is firstly, the implication of Received Signal Strength Indicator (RSSI) dependency on height and secondly...

  20. Performance of a high efficiency high power UHF klystron

    International Nuclear Information System (INIS)

    Konrad, G.T.

    1977-03-01

    A 500 kW c-w klystron was designed for the PEP storage ring at SLAC. The tube operates at 353.2 MHz, 62 kV, a microperveance of 0.75, and a gain of approximately 50 dB. Stable operation is required for a VSWR as high as 2 : 1 at any phase angle. The design efficiency is 70%. To obtain this value of efficiency, a second harmonic cavity is used in order to produce a very tightly bunched beam in the output gap. At the present time it is planned to install 12 such klystrons in PEP. A tube with a reduced size collector was operated at 4% duty at 500 kW. An efficiency of 63% was observed. The same tube was operated up to 200 kW c-w for PEP accelerator cavity tests. A full-scale c-w tube reached 500 kW at 65 kV with an efficiency of 55%. In addition to power and phase measurements into a matched load, some data at various load mismatches are presented

  1. Mixing height measurements from UHF wind profiling radar

    Energy Technology Data Exchange (ETDEWEB)

    Angevine, W.M.; Grimsdell, A.W. [CIRES, Univ. of Colorado, and NOAA Aeronomy Lab., Boulder, Colorado (United States)

    1997-10-01

    Mixing height in convective boundary layers can be detected by wind profiling radars (profilers) operating at or near 915 MHZ. We have made such measurements in a variety of settings including Alabama in 1992; Nova Scotia, Canada, during the North Atlantic Regional Experiment (NARE) 1993; Tennessee during the Southern Oxidant Study (SOS) 1994; near a 450 m tower in Wisconsin in 1995; and extensively in Illinois during the Flatland95, `96, and `97 experiments, as well as continuous operations at the Flatland Atmospheric Observatory. Profiler mixing height measurements, like all measurements, are subject to some limitations. The most important of these are due to rainfall, minimum height, and height resolution. Profilers are very sensitive to rain, which dominates the reflectivity and prevents the mixing height from being detected. Because the best height resolution is currently 60 m and the minimum height is 120-150 m AGL, the profiler is not suited for detecting mixing height in stable or nocturnal boundary layers. Problems may also arise in very dry or cold environments. (au) 12 refs.

  2. VHF/UHF filters and multicouplers application of air resonators

    CERN Document Server

    Piette, Bernard

    2013-01-01

    This book describes the various devices used in radio communication and broadcasting to achieve high selectivity filtering and coupling. After providing a background in the basics of microwave theory and more detailed material - including a special chapter on precision and errors in measurement - the reader will find detailed descriptions, manufacturing processes, and, for the most useful instances, a number of worked-through formulas, which will allow engineers and technicians to design circuits or components for filtering or coupling applications. Content is covered in this format across a b

  3. C-Band SATCOM Range Communications System for ELVs using ESAs and High Dynamics Modem, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — The development and implementation of passive phased array antennas (PAAs) offers significant performance benefits over the current active arrays. The keys to...

  4. Integration of Commercial Mobile Satellite Services into Naval Communications

    National Research Council Canada - National Science Library

    Stone, Cary

    1997-01-01

    Mobile Satellite Services (MSS) need to be integrated into Naval Communications. DoD SATCOM military owned systems fall well short of meeting DoD SATCOM requirements in general and mobile SATCOM specifically...

  5. Female preference and predation risk models can explain the maintenance of a fallow deer (Dama dama lek and its 'handy' location.

    Directory of Open Access Journals (Sweden)

    Marco Apollonio

    Full Text Available We tested the predictions of three models (female preference; hotspot; predator avoidance on lek formation in the fallow deer population of San Rossore, Tuscany. We collected behavioural observations in two leks and radiotracking data on 67 deer over 7 years. Two deer sub-populations were present in the northern and southern sides of the area, respectively, the two sectors being delimited by a river and including one lek each. Predictions were tested for one lek (SG, located in the south-side where we set up our 7-year radiotracking program. Data from a second lek (FO, north-side were used to test those predictions which imply the occurrence of multiple leks in the same population. We showed that the majority of females made one single visit to one lek, only during the rut. The lek was located outside areas of higher female traffic and home range overlap, and females increased home range sizes during the rut to reach it. Twilight routes of females never crossed the lek; instead, females walked atypical routes and at a faster pace to reach the lek and mate. The distance between the two leks was higher than the average diameter of female home ranges, and only one lek was present within female home ranges. Males reached the lek one month before the arrival of females, corroborating that lekking is a female-initiated process (females moving towards large clumped male aggregations rather than a male-initiated process (males moving towards female hotspots. Our results supported the female preference model, and rejected the predictions of the hotspot model. Also, leks were located far from areas with higher predation risk, supporting the predator avoidance model. The position of lek SG resulted 'handy' at the sub-population level because of the optimal trade-off between travel costs for females to reach it and avoidance of human predators.

  6. Female Preference and Predation Risk Models Can Explain the Maintenance of a Fallow Deer (Dama dama) Lek and Its ‘Handy’ Location

    Science.gov (United States)

    Apollonio, Marco; De Cena, Fabio; Bongi, Paolo; Ciuti, Simone

    2014-01-01

    We tested the predictions of three models (female preference; hotspot; predator avoidance) on lek formation in the fallow deer population of San Rossore, Tuscany. We collected behavioural observations in two leks and radiotracking data on 67 deer over 7 years. Two deer sub-populations were present in the northern and southern sides of the area, respectively, the two sectors being delimited by a river and including one lek each. Predictions were tested for one lek (SG), located in the south-side where we set up our 7-year radiotracking program. Data from a second lek (FO, north-side) were used to test those predictions which imply the occurrence of multiple leks in the same population. We showed that the majority of females made one single visit to one lek, only during the rut. The lek was located outside areas of higher female traffic and home range overlap, and females increased home range sizes during the rut to reach it. Twilight routes of females never crossed the lek; instead, females walked atypical routes and at a faster pace to reach the lek and mate. The distance between the two leks was higher than the average diameter of female home ranges, and only one lek was present within female home ranges. Males reached the lek one month before the arrival of females, corroborating that lekking is a female-initiated process (females moving towards large clumped male aggregations) rather than a male-initiated process (males moving towards female hotspots). Our results supported the female preference model, and rejected the predictions of the hotspot model. Also, leks were located far from areas with higher predation risk, supporting the predator avoidance model. The position of lek SG resulted ‘handy’ at the sub-population level because of the optimal trade-off between travel costs for females to reach it and avoidance of human predators. PMID:24599036

  7. Tissue mobilization rates in male fallow deer (Dama dama) as determined by computed tomography: the effects of natural and enforced food restriction

    International Nuclear Information System (INIS)

    Jopson, N.B.; Thompson, J.M.; Fennessy, P.F.

    1997-01-01

    The breeding season in temperate species of deer is characterized by the rut, a period of intense sexual activity when the male eats very little and competes for access to females. Males have been reported as losing proportionately up to 0.30 of live weight over a 6- to 8- week period. The majority of the live-weight loss is accounted for in loss of depot fat, with smaller losses in muscle reserves

  8. Individual Heterosis for Birth Weight of N'dama Crossbred Calves in ...

    African Journals Online (AJOL)

    Birth weight records of 1137 calves of which 94 were straight bred and 1043 were crossbred (545 males and 592 females) from crosses with two indigenous breeds Muturu and Keteku and seven breeds, Brahman, Angus, Charolais, German Brown, Hereford, Jersey and Santa Getrudis collected from Fasola Stock Farm ...

  9. Sustaining N'dama cattle for the resource-poor farmers in the Gambia

    African Journals Online (AJOL)

    This study assesses the genetic improvement, sustainable production, utilization and conservation of this breed of cattle in order to strengthen them through relevant technical strategies and policy measures. Review of relevant literature and policy documents, participatory group discussions were used while the information ...

  10. Pred Stud dictors of dents at A f emergen dama Univ ncy contr ...

    African Journals Online (AJOL)

    raoul

    Lack of knowledge, fear of being seen by others, and inconvenient service delivery ... friendly reproductive health services to promote preventive behavior. ... this project, EC was provided in a repackaged brand so it would appeal to adolescents and youth in several .... Necessary corrections and changes were made in time.

  11. Séptima Conferencia de "Primeras Damas" de las Américas

    Directory of Open Access Journals (Sweden)

    1998-06-01

    Full Text Available As has been done ever since 1990, when the First Conference of Wives of Presidents and Heads of State was held, first ladies and other women representing more than 30 countries as well as various national and international organizations met in Panama City on 8 and 9 October, 1997. The meeting was a forum for discussing how far the countries have come in the implementation of projects and programs for the benefit of the underprivileged and groups facing discrimination, such as women and children. Attention was brought to bear on the still existing gap between the protective legislation in existence and its enforcement, and there was a renewed commitment to continue to fight for greater equality and justice in the countries of the Americas. The meeting ended with the Panama Declaration, which summarizes the most pressing social goals and the action plan by means of which such goals will be pursued.

  12. Las otras primeras damas en la Argentina peronista: Elena Caporale de Mercante

    Directory of Open Access Journals (Sweden)

    Carolina Barry

    2016-07-01

    Full Text Available One of the most singular characteristics of peronism is the originality of holding within it a double charismatic leadership complementary to each other. The quintessential paradigm corresponds to Perón and Eva Perón, but there were other cases, more modest, that have served to cement the argentine political culture: the marriage at power. Those first ladies redefined its role, and built spaces of power and influence in government. In this paper I analyze the role of Elena Caporale de Mercante and her new political role as wife of the most important governor who had the first Peronist government.

  13. Information flow in the DAMA Project beyond database managers: Information flow managers

    Energy Technology Data Exchange (ETDEWEB)

    Russell, L. [Argonne National Lab., IL (United States); Wolfson, O.; Yu, C. [Illinois Univ., Chicago, IL (United States)

    1996-03-01

    To meet the demands of commercial data traffic on the information highway, a new look at managing data is necessary. One projected activity, sharing of point-of-sale information, is being considered in the Demand Activated Manufacturing Project of the American Textile Partnership project. A scenario is examined in which 100,000 retail outlets communicate over a period of days. They provide the latest estimate of demand for sewn products across a chain of 26,000 suppliers through the use of bill-of-materials explosions at four levels of detail. A new paradign the information flow manager, is developed to handle this situation, including the case where members of the supply chain fail to communicate and go out of business. Techniques for approximation are introduced to keep estimates of demand as current as possible.

  14. An analysis of military use of commercial satellite communications

    OpenAIRE

    Forest, Benjamin D.

    2008-01-01

    commercial SATCOM, evaluates current predictions for military use of commercial SATCOM, and describes measures of effectiveness that can be used to evaluate the various SATCOM options. In culmination, this thesis defines what constitutes an appropriate balance of military and commercial SATCOM usage using cost, technical, and policy compliance measures of effectiveness. The measures of effectiveness lead to a recommendation of a more deliberate, less ad hoc use of commercial SATCOM for the va...

  15. Design of a Super High Frequency (SHF) Extremely High Frequency (EHF) Satellite Communications (SATCOM) Terminal (SEST) for New Construction Naval Surface Ships using the systems engineering process

    OpenAIRE

    Harrell, Steven B.

    1996-01-01

    Alternative means of satisfying the high bandwidth and protected communications requirements for New Construction Naval Surface Ships in the midst of conflicting reduced radar cross section (RCS) requirements were investigated using the systems engineering process. Various antenna, ranging from parabolic dish antennas to Luneberg lens antennas to phased array antennas, and feed and amplifier combinations were considered to provide a dual-band Super High Frequency (SHF) and Extr...

  16. Investigation of a Biocompatible Polyurethane-Based Isotropically Conductive Adhesive for UHF RFID Tag Antennas

    Science.gov (United States)

    Yang, Cheng; Yuen, Matthew M. F.; Gao, Bo; Ma, Yuhui; Wong, C. P.

    2011-01-01

    As a candidate dispersant for silver-based isotropically conductive adhesives (ICAs), polyurethane (PU) is an environmentally benign material that can withstand a high deformation rate and that exhibits excellent reliability. In this work we investigated methyl ethyl ketoxime (MEKO) blocked isophorone diisocyanate (IPDI) and MEKO blocked hexamethylene diisocyanate (HDI) as dispersant materials, and we characterize the electrical conductivity, mechanical properties, and reliability of these PU-based ICAs with silver-flake filler content ranging from 30 wt.% to 75 wt.%. Results of temperature-humidity testing (THT) at 85°C and 85% relative humidity (RH) and thermal cycling testing (TCT) at -40°C to 125°C show that these ICAs have excellent reliability. Our experimental results suggest that the MEKO blocked PU dispersants are suitable for preparing ultralow-cost, flexible, high-performance ICAs for printing antennas for ultrahigh-frequency radiofrequency identification (RFID) tags. These tags can potentially be used for identifying washable items and food packaging.

  17. Low modulation index RF signal detection for a passive UHF RFID transponder

    International Nuclear Information System (INIS)

    Liu Zhongqi; Zhang Chun; Li Yongming; Wang Zhihua

    2009-01-01

    In a typical RFID system the reader transmits modulated RF power to provide both data and energy for the passive transponder. Low modulation index RF energy is preferable for an adequate tag power supply and increase in communication range but gives rise to difficulties for near-field conventional demodulation. Therefore, a novel ASK demodulator for minimum 20% modulation index RF signal detection over a range of 23 dB is presented. Thanks to the proposed innovative divisional linear conversion from the power into voltage signal, the detection sensitivity is ensured over a wide power range with low power consumption of 8.6 μW. The chip is implemented in UMC 0.18 μm mix-mode CMOS technology, and the chip area is 0.06 mm 2 .

  18. Ultra Low Power, Radiation Tolerant UHF Radio Technologies for In Situ Communication Applications

    Science.gov (United States)

    Lay, N. E.

    2001-01-01

    For future deep space missions, significant reductions in the mass and power requirements for short-range telecommunication systems will be critical in enabling a wide variety of new mission concepts. These possibilities include penetrators, gliders, miniature rovers, and sensor networks. Under joint funding from NASA's Cross Enterprise and JPL's Telecommunications and Mission technology programs, recent development activity has focused on the design of ultralow mass and power transceiver systems and subsystems suitable for operation in a flight environment. For these efforts, the functionality of the transceiver has been targeted towards a specific Mars communications scenario. However, the overall architecture is well suited to any short or medium range application where a remote probe will aperiodically communicate with a base station, possibly an orbiter, for the eventual purpose of relaying science information back to Earth. In 2001, these sponsors have been augmented with collaborative expertise and funding from JPL's Center for Integrated Space Microsystems in order to migrate existing concepts and designs to a System on a Chip (SOAC) solution. Additional information is contained in the original extended abstract.

  19. Conditions for sustaining low-pressure plasma columns by travelling electromagnetic UHF waves

    International Nuclear Information System (INIS)

    Benova, E.; Zhelyazkov, I.

    1997-01-01

    The paper considers the conditions for sustaining low-pressure plasma columns by travelling electromagnetic waves in symmetric and dipolar modes, respectively. The treatment is fully electrodynamic. It is shown that the wave energy flux along the plasma column determines the conditions for sustaining the discharge. In particular as the plasma is sustained by a symmetric wave whose flux depends mainly on the radial distribution of the wave electric field whilst for a dipolar wave sustained plasma the flux is specified by the magnitude of the axial wave field component at the plasma-dielectric interface. (orig.)

  20. UHF-plasma torch emission spectrometry for cadmium, lead and zinc by vaporization introduction

    International Nuclear Information System (INIS)

    Nakashima, Ryozo

    1978-01-01

    As the introduction technique of aerosol into the plasma torch, vaporization introduction of metals was studied. An aliquot of metal nitrates was pipetted in a graphite crucible and dried with a vacuum pump. The dried sample was heated in a high-frequency induction furnace under inert gas carrier such as argon or nitrogen (reduction introduction). Chlorination introduction with hydrogen chloride was also studied. High-purity grade of argon, nitrogen and hydrogen chloride was used as carrier. Intensities were based on the peak area of intensity-time curves at 228.8 nm (cadmium), 405.8 nm (lead), and 213.9 nm (zinc). In the reduction introduction, the minimum temperatures to attain a constant peak area, which means a complete vaporization were 700 0 C (cadmium), 1500 0 C (lead), and 1100 0 C (zinc), respectively. In the chlorination, this temperature was 500 0 C (cadmium), 700 0 C (lead), and 300 0 C (zinc) respectively. For two introduction techniques, the latter was more sensitive than the former for cadmium and zinc, while the former was more sensitive for lead. The optimum temperature, detection limits, and the coefficients of variance calculated from the measurements of 1.0 μg of metals were as follows: Cadmium: chlorination at 850 0 C, D.L. 5ng, C.V. 10%. Lead: reduction at 1600 0 C, D.L. 10ng, C.V. 15%. Zinc: chlorination at 850 0 C, D.L. 5ng, C.V. 9%. Linear calibration lines having 45 0 slope at log-log plots, were obtained over the range from 0.05 to 6 μg for cadmium and zinc, 0.06 to 6 μg for lead on the conditions above. These techniques were also applied for analyses of biological materials for three metals without prior separations. Although the sensitivity of the chlorination introduction technique for lead was rather poor compared with that of reduction technique, the chlorination technique was applied to minimize the introduction of coexisting materials such as alkali and alkaline earth metals. The analytical results agreed reasonably with the referred values. (auth.)

  1. UHF RiverSonde Observations of Water Surface Velocity at Threemile Slough, California

    National Research Council Canada - National Science Library

    Teague, Calvin C; Barrick, Donald E; Lilleboe, Peter M; Cheng, Ralph T; Ruhl, Catherine A

    2005-01-01

    .... The velocity is measured every 15 minutes by an ultrasonic velocity meter (UVM) which determines the water velocity from two-way acoustic propagation time-difference measurements made across the channel...

  2. Analytical and numerical study of a gaseous plasma dipole in the UHF frequency band

    NARCIS (Netherlands)

    Melazzi, Davide; Lancellotti, Vito; Capobianco, Antonio Daniele

    2017-01-01

    Gaseous plasma antennas are appealing in applications in which reconfigurability is desired, because the radiation properties can be changed by tuning the plasma parameters. In this paper, an analytical and numerical analysis of a gaseous plasma dipole that works in the 0.3-3 GHz frequency range is

  3. Low modulation index RF signal detection for a passive UHF RFID transponder

    Energy Technology Data Exchange (ETDEWEB)

    Liu Zhongqi [Department of Electronic Engineering, Tsinghua University, Beijing 100084 (China); Zhang Chun; Li Yongming; Wang Zhihua, E-mail: liu-zq04@mails.tsinghua.edu.c [Institute of Microelectronics, Tsinghua University, Beijing 100084 (China)

    2009-09-15

    In a typical RFID system the reader transmits modulated RF power to provide both data and energy for the passive transponder. Low modulation index RF energy is preferable for an adequate tag power supply and increase in communication range but gives rise to difficulties for near-field conventional demodulation. Therefore, a novel ASK demodulator for minimum 20% modulation index RF signal detection over a range of 23 dB is presented. Thanks to the proposed innovative divisional linear conversion from the power into voltage signal, the detection sensitivity is ensured over a wide power range with low power consumption of 8.6 {mu}W. The chip is implemented in UMC 0.18 {mu}m mix-mode CMOS technology, and the chip area is 0.06 mm{sup 2}.

  4. Testing the effects of temperature and humidity on printed passive UHF RFID tags on paper substrate

    Science.gov (United States)

    Linnea Merilampi, Sari; Virkki, Johanna; Ukkonen, Leena; Sydänheimo, Lauri

    2014-05-01

    This article is an interesting substrate material for environmental-friendly printable electronics. In this study, screen-printed RFID tags on paper substrate are examined. Their reliability was tested with low temperature, high temperature, slow temperature cycling, high temperature and high humidity and water dipping test. Environmental stresses affect the tag antenna impedance, losses and radiation characteristics due to their impact on the ink film and paper substrate. Low temperature, temperature cycling and high humidity did not have a radical effect on the measured parameters: threshold power, backscattered signal power or read range of the tags. However, the frequency response and the losses of the tags were slightly affected. Exposure to high temperature was found to even improve the tag performance due to the positive effect of high temperature on the ink film. The combined high humidity and high temperature had the most severe effect on the tag performance. The threshold power increased, backscattered power decreased and the read range was shortened. On the whole, the results showed that field use of these tags in high, low and changing temperature conditions and high humidity conditions is possible. Use of these tags in combined high-humidity and high-temperature conditions should be carefully considered.

  5. Solid state pulse master oscillator of UHF system for linac feeding

    International Nuclear Information System (INIS)

    Beloglazov, V.I.; Dovbnya, A.N.; Kutsevlyak, S.V.; Mosypan, P.I.

    1997-01-01

    Possibility of creation of solid state pulse generator which specifies necessary requirements and generates output pulses of several kilowatts and 2.8 Ghz carrier frequency is considered. A model of it was constructed which has parameters close to the needed

  6. Computer Investigation of VHF, UHF and SHF Frequencies for Marine Corps Packet Radio Usage.

    Science.gov (United States)

    1980-12-01

    a J ’A *z- $-- Zo ’A(-9 (A* J * w 4U oWL3 49 1-- .M 0 TJ 0 afJ ’At~ n - JOLI V97 *~p’At-OWu ’A - . t.3 j4c w..J Wm 3 LU 01). .JIAlUJ b-U).J(.0InT 0-.J...Measurements at Millimeter Wavelengths, by N. C. Currie, E. E. Martin and F. B. Dyer, December 1975. 122 INITIAL DISTRIBUTION LIST No. Copies 1. Defense

  7. Transmisor Outphasing en UHF con tecnología GaN HEMT

    OpenAIRE

    Mendiguchia Gutiérrez, Hugo

    2017-01-01

    La evolución hacia nuevas generaciones de sistemas de comunicación inalámbricas, el caso de 4G y 5G en sistemas móviles, ha venido acompañada por un incremento en la eficiencia espectral de los formatos de modulación digital seleccionados. A cambio, la señal paso-banda a transmitir experimenta una variación muy pronunciada en su envolvente, con valores elevados de relación potencia pico a potencia promedio (PAPR de sus siglas en inglés). Entre las arquitecturas más atractivas para una amplifi...

  8. AN/GRC-171 Rivet Switch Multichannel UHF/AM Transceiver

    Science.gov (United States)

    1975-03-01

    1879CS/LGMG Arellano, Cayetno A Chief, ATC Operations 1879CS/ FFA Capt Rucker, William C. CMSgt McCallum, Duncan Control Tower Chief Contractor...9/* zs L-f-ZO 7s. to ZJ-S’ 59.9s GENERAL PURPOSE FORM AFCS iaoot/io«i . o.^...,«.., ,,,,„ i ,„„„ lIBS^pnnwWWIW^ Bpp ^BWTWRPIP»^ 4.3.15 AN

  9. VHF and UHF radar observations of equatorial F region ionospheric irregularities and background densities

    Science.gov (United States)

    Towle, D. M.

    1980-02-01

    A series of measurements of the properties of equatorial ionospheric irregularities were made at Kwajalein, Marshall Islands (M.I.) in August 1977 and July-August 1978. These measurements, sponsored by the Defense Nuclear Agency (DNA), involved coordinated ground-based and in situ sensors. The ARPA Long-Range Tracking and Instrumentation Radar (ALTAIR), operated by Lincoln Laboratory, obtained backscatter and transmission data during five nights in August 1977 and eight nights in July-August 1978. This report describes the ALTAIR data from the night of August 11, 1978, which yield direct quantitative measurements of 1-m and 3/8-m irregularities and of plasma depleted regions. These plasma depleted regions, previously predicted on the basis of theoretical analysis and in situ data, were observed during the decay phase and not the generative phase of the field-aligned irregularities.

  10. Irradiation tests on bipolar front-end preamplifier using the Harris UHF1 technology

    Energy Technology Data Exchange (ETDEWEB)

    Goyot, M

    1997-09-01

    A low noise, low power, radiation hard, full custom integrated circuit has been studied for coupling with photodetectors of the CMS electromagnetic calorimeter. A new version of the prototype preamplifier has been designed with improved performances (noise, dynamic range, consumption). Irradiation tests on this monolithic circuit have been performed at CERN with a X ray SEIFERT RP149 generator up to 10 Mrad equivalent silicon oxide. Tests results are presented. (author) 5 refs.

  11. Secondary electrons monitor for continuous electron energy measurements in UHF linac

    International Nuclear Information System (INIS)

    Zimek, Zbigniew; Bulka, Sylwester; Mirkowski, Jacek; Roman, Karol

    2001-01-01

    Continuous energy measurements have now became obligatory in accelerator facilities devoted to radiation sterilization process. This is one of several accelerator parameters like dose rate, beam current, bean scan parameters, conveyer speed which must be recorded as it is a required condition of accelerator validation procedure. Electron energy measurements are rather simple in direct DC accelerator, where the applied DC voltage is directly related to electron energy. High frequency linacs are not offering such opportunity in electron energy measurements. The analyzing electromagnet is applied in some accelerators but that method can be used only in off line mode before or after irradiation process. The typical solution is to apply the non direct method related to control and measurements certain accelerator parameters like beam current and microwave energy pulse power. The continuous evaluation of electron energy can be performed on the base of calculation and result comparison with calibration curve

  12. Locatable-body temperature monitoring based on semi-active UHF RFID tags.

    Science.gov (United States)

    Liu, Guangwei; Mao, Luhong; Chen, Liying; Xie, Sheng

    2014-03-26

    This paper presents the use of radio-frequency identification (RFID) technology for the real-time remote monitoring of body temperature, while an associated program can determine the location of the body carrying the respective sensor. The RFID chip's internal integrated temperature sensor is used for both the human-body temperature detection and as a measurement device, while using radio-frequency communication to broadcast the temperature information. The adopted RFID location technology makes use of reference tags together with a nearest neighbor localization algorithm and a multiple-antenna time-division multiplexing location system. A graphical user interface (GUI) was developed for collecting temperature and location data for the data fusion by using RFID protocols. With a puppy as test object, temperature detection and localization experiments were carried out. The measured results show that the applied method, when using a mercury thermometer for comparison in terms of measuring the temperature of the dog, has a good consistency, with an average temperature error of 0.283 °C. When using the associated program over the area of 12.25 m2, the average location error is of 0.461 m, which verifies the feasibility of the sensor-carrier location by using the proposed program.

  13. Locatable-Body Temperature Monitoring Based on Semi-Active UHF RFID Tags

    Directory of Open Access Journals (Sweden)

    Guangwei Liu

    2014-03-01

    Full Text Available This paper presents the use of radio-frequency identification (RFID technology for the real-time remote monitoring of body temperature, while an associated program can determine the location of the body carrying the respective sensor. The RFID chip’s internal integrated temperature sensor is used for both the human-body temperature detection and as a measurement device, while using radio-frequency communication to broadcast the temperature information. The adopted RFID location technology makes use of reference tags together with a nearest neighbor localization algorithm and a multiple-antenna time-division multiplexing location system. A graphical user interface (GUI was developed for collecting temperature and location data for the data fusion by using RFID protocols. With a puppy as test object, temperature detection and localization experiments were carried out. The measured results show that the applied method, when using a mercury thermometer for comparison in terms of measuring the temperature of the dog, has a good consistency, with an average temperature error of 0.283 °C. When using the associated program over the area of 12.25 m2, the average location error is of 0.461 m, which verifies the feasibility of the sensor-carrier location by using the proposed program.

  14. Irradiation Tests on Bipolar Front-End Preamplifier Using the Harris UHF1 Technology

    CERN Document Server

    Goyot, Michel

    1997-01-01

    A low noise, low power, radiation hard, full custom integrated circuit has been studied for coupling with photodetectors of the CMS electromagnetic calorimeter. A new version of the prototype preamplifier has been designed with improved performances ( noise, dynamic range, consumption). Irradiation tests on this monolithic circuit have been performed at CERN with a Xray SEIFERT RP149 generator up to 10Mrad ( SiO2). Tests results are presented.

  15. A Determination of the Minimum Frequency Requirements for a PATRIOT Battalion UHF Communication System.

    Science.gov (United States)

    1982-12-01

    a computer program which simulates the PATRIOT battalion UH1F communication system. *.-.The detailed description of how the model performs this...the Degree of Master of Science .AI . j tf ti on-i by 5 , .... . :it Lard/or Gregory H. Swanson DLt Captain USA Graduate Computer Science I...5 Model Application..... . . . .. .. . . .. .. . . 6 Thesnis Overviev ....... o.000000000000000000000. .6 Previous Studies

  16. UHF coplanar-slot antenna for aircraft-to-satellite data communications

    Science.gov (United States)

    Myhre, R. W.

    1979-01-01

    The initiative for starting the Aircraft-to-Satellite Data Relay (ASDAR) Program came from a recognition that much of the world's weather originates in the data sparse area of the tropics which are primarily ocean. The ASDAR system consists of (1) a data acquisition and control unit to acquire, store and format these data; (2) a clock to time the data sampling and transmission periods; and (3) a transmitter and low-profile upper hemisphere coverage antenna to relay the formatted data via satellite to the National Weather Service ground stations, as shown schematically. The low-profile antenna is a conformal antenna based on the coplanar-slot approach. The antenna is circular polarized and has an on-axis gain of nearly 2.5 dB and a HPBW greater than 90 deg. The discussion covers antenna design, radiation characteristics, flight testing, and system performance.

  17. DAMAS NEGRAS : DE ISAURA A RITA BAIANA E BERTOLEZA A CONSTRUÇÃO DA PERSONAGEM FEMININA.

    OpenAIRE

    Santiago, Werianny

    2015-01-01

    Esta dissertação apresenta uma discussão sobre a imagem da mulher negra presente nas obras literárias brasileiras. Para objetos de análise foram selecionadas as obras A Escrava Isaura - escrita por Bernardo Guimarães e O Cortiço que é um romance de autoria do escritor Aluísio Azevedo. A dissertação teve como objetivo geral analisar a criação da imagem da mulher negra na literatura brasileira, a partir das obras mencionadas. Especificamente, pretendeu-se pesquisar as concepçõ...

  18. LE PLÉONASME COMME MÉTAPHORE DE L’IDÉOLOGIE CHEZ LÉON-GONTRAN DAMAS ET JEAN-MARIE ADIAFFI ADÉ / PLEONASM AS A METAPHOR FOR IDEOLOGY IN LEONGONTRAN DAMAS AND JEAN-MARIE ADIAFFI ADÉ / PLEONASMUL CA METAFORĂ A IDEOLOGIEI LA LEONGONTRAN DAMAS ŞI JEAN-MARIE ADIAFFI ADÉ

    Directory of Open Access Journals (Sweden)

    Youssouf Diawara

    2014-11-01

    Full Text Available Dans la mise en sens, un autre principe est venu perturber celui de la logique, c’est celui de l’association. C’est un processus où une idée, un mot, une image en appellent d’autres, selon les deux grands mécanismes de l’analogie et de la contiguïté. La présente réflexion s’attache à rendre compte de l’organisation syntaxique et sémantique du discours par lui-même et pour luimême, à partir d’actes d’inférence ou de langage indirect.

  19. An approach to effective UHF (S/L band) data communications for satellite Personal Communication Service (PCS)

    Science.gov (United States)

    Hayase, Joshua Y.

    1995-01-01

    Reliable signaling information transfer is fundamental in supporting the needs of data communication PCS via LMS (Land Mobile Service) SSs (satellite systems). The needs of the system designer can be satisfied only through the collection of media information that can be brought to bear on the pertinent design issues. We at ISI hope to continue our dialogue with fading media experts to address the unique data communications needs of PCS via LMS SSs.

  20. An MILP-Based Cross-Layer Optimization for a Multi-Reader Arbitration in the UHF RFID System

    Science.gov (United States)

    Choi, Jinchul; Lee, Chaewoo

    2011-01-01

    In RFID systems, the performance of each reader such as interrogation range and tag recognition rate may suffer from interferences from other readers. Since the reader interference can be mitigated by output signal power control, spectral and/or temporal separation among readers, the system performance depends on how to adapt the various reader arbitration metrics such as time, frequency, and output power to the system environment. However, complexity and difficulty of the optimization problem increase with respect to the variety of the arbitration metrics. Thus, most proposals in previous study have been suggested to primarily prevent the reader collision with consideration of one or two arbitration metrics. In this paper, we propose a novel cross-layer optimization design based on the concept of combining time division, frequency division, and power control not only to solve the reader interference problem, but also to achieve the multiple objectives such as minimum interrogation delay, maximum reader utilization, and energy efficiency. Based on the priority of the multiple objectives, our cross-layer design optimizes the system sequentially by means of the mixed-integer linear programming. In spite of the multi-stage optimization, the optimization design is formulated as a concise single mathematical form by properly assigning a weight to each objective. Numerical results demonstrate the effectiveness of the proposed optimization design. PMID:22163743

  1. Current state-of-the-art for the measurement of non-Maxwellian plasma parameters with the EISCAT UHF Facility

    Directory of Open Access Journals (Sweden)

    D. Hubert

    Full Text Available New results on the information that can be extracted from simulated non-Maxwellian incoherent radar spectra are presented. The cases of a pure ionosphere and of a composite ionosphere typical of a given altitude of the auroral F region are considered. In the case of a pure ionosphere of NO+ or O+ ions it has been shown that the electron temperature and the electron density can be derived from a Maxwellian analysis of radar spectra measured at aspect angles of 0° or 21° respectively; the ion temperature and ion temperature anisotropy can be derived from a non- constraining model such as the 1D Raman fitting of a complementary measurement made at an aspect angle larger than 0° for the NO+ ions, or at an aspect angle larger than 21° for the O+ ions. Moreover with such measurements at large aspect angles, the shape of the velocity ion distribution functions can simultaneously be inferred. The case of a composite ionosphere of atomic O+ and molecular NO+ ions is a difficult challenge which requires simultaneously a complementary measurement of the electron temperature to provide the ion composition and the electron density from the incoherent radar spectra at a specific aspect angle of 21°; hence, a model dependent routine is necessary to derive the ion temperatures and ion temperature anisotropies. In the case where the electron temperature is not given, a routine which depends on ion distribution models is required first: the better the ion distribution models are, the more accurately derived the plasma parameters will be. In both cases of a composite ionosphere, the 1D Raman fitting can be used to keep a check on the validity of the results provided by the ion distribution model dependent routine.

  2. On the Feasibility of Gap Detection of Power Transformer Partial Discharge UHF Signals: Gap Propagation Characteristics of Electromagnetic Waves

    OpenAIRE

    Xiaoxing Zhang; Guozhi Zhang; Yalong Li; Jian Zhang; Rui Huang

    2017-01-01

    This study analyzed the transformer electromagnetic gap propagation characteristics. The influence of gap size is also analyzed, and the results experimentally verified. The obtained results indicated that the gap propagation characteristics of electromagnetic wave signals radiated by the partial discharge (PD) source in different directions are substantially different. The intensity of the electromagnetic wave in the gap reaches a maximum at a gap height of 1 cm; and inside the gap, the inte...

  3. An RF Energy Harvester System Using UHF Micropower CMOS Rectifier Based on a Diode Connected CMOS Transistor

    Directory of Open Access Journals (Sweden)

    Mohammad Reza Shokrani

    2014-01-01

    Full Text Available This paper presents a new type diode connected MOS transistor to improve CMOS conventional rectifier's performance in RF energy harvester systems for wireless sensor networks in which the circuits are designed in 0.18 μm TSMC CMOS technology. The proposed diode connected MOS transistor uses a new bulk connection which leads to reduction in the threshold voltage and leakage current; therefore, it contributes to increment of the rectifier’s output voltage, output current, and efficiency when it is well important in the conventional CMOS rectifiers. The design technique for the rectifiers is explained and a matching network has been proposed to increase the sensitivity of the proposed rectifier. Five-stage rectifier with a matching network is proposed based on the optimization. The simulation results shows 18.2% improvement in the efficiency of the rectifier circuit and increase in sensitivity of RF energy harvester circuit. All circuits are designed in 0.18 μm TSMC CMOS technology.

  4. An MILP-Based Cross-Layer Optimization for a Multi-Reader Arbitration in the UHF RFID System

    Directory of Open Access Journals (Sweden)

    Chaewoo Lee

    2011-02-01

    Full Text Available In RFID systems, the performance of each reader such as interrogation range and tag recognition rate may suffer from interferences from other readers. Since the reader interference can be mitigated by output signal power control, spectral and/or temporal separation among readers, the system performance depends on how to adapt the various reader arbitration metrics such as time, frequency, and output power to the system environment. However, complexity and difficulty of the optimization problem increase with respect to the variety of the arbitration metrics. Thus, most proposals in previous study have been suggested to primarily prevent the reader collision with consideration of one or two arbitration metrics. In this paper, we propose a novel cross-layer optimization design based on the concept of combining time division, frequency division, and power control not only to solve the reader interference problem, but also to achieve the multiple objectives such as minimum interrogation delay, maximum reader utilization, and energy efficiency. Based on the priority of the multiple objectives, our cross-layer design optimizes the system sequentially by means of the mixed-integer linear programming. In spite of the multi-stage optimization, the optimization design is formulated as a concise single mathematical form by properly assigning a weight to each objective. Numerical results demonstrate the effectiveness of the proposed optimization design.

  5. Simulation of the passive UHF devices on the basis of high-temperature superconductors for planar multilayer anisotropic structures

    CERN Document Server

    Gashinova, M S; Kolmakov, Y A; Vendik, I B

    2002-01-01

    The electrodynamic analysis of the arbitrary multilayer medium, including the anisotropic layers and containing the arbitrary form conductors is carried out. Thin layers of the high-temperature superconductor (HTSC) are considered as conductors. Determination of the surface current density is a result of the numerical solution. Accounting for the losses in the HTSC is accomplished on the basis of determining the equivalent surface impedance and using the Leontovich boundary conditions. Anisotropy is accounted for in the determination of the Green spectral dyad for the structure with arbitrary number of the anisotropic or isotropic layers. Calculation of the surface current density distribution demonstrates the correctness of the proposed model

  6. An RF energy harvester system using UHF micropower CMOS rectifier based on a diode connected CMOS transistor.

    Science.gov (United States)

    Shokrani, Mohammad Reza; Khoddam, Mojtaba; Hamidon, Mohd Nizar B; Kamsani, Noor Ain; Rokhani, Fakhrul Zaman; Shafie, Suhaidi Bin

    2014-01-01

    This paper presents a new type diode connected MOS transistor to improve CMOS conventional rectifier's performance in RF energy harvester systems for wireless sensor networks in which the circuits are designed in 0.18  μm TSMC CMOS technology. The proposed diode connected MOS transistor uses a new bulk connection which leads to reduction in the threshold voltage and leakage current; therefore, it contributes to increment of the rectifier's output voltage, output current, and efficiency when it is well important in the conventional CMOS rectifiers. The design technique for the rectifiers is explained and a matching network has been proposed to increase the sensitivity of the proposed rectifier. Five-stage rectifier with a matching network is proposed based on the optimization. The simulation results shows 18.2% improvement in the efficiency of the rectifier circuit and increase in sensitivity of RF energy harvester circuit. All circuits are designed in 0.18 μm TSMC CMOS technology.

  7. A correlation between RSSI and height in UHF band and comparison of geolocation spectrum database view of TVWS

    CSIR Research Space (South Africa)

    Maliwatu, R

    2016-12-01

    Full Text Available antenna. Thus, the power incident onto the antenna, Pinc, may be estimated via the power entering the spectrum analyser, Psa, as Pinc = Psa + Lc −GA = Psa − 1.1, (dB). (1) 3.1 First set of spectrum scan measurements The first round of measurements...

  8. Monitoring dynamic reactions of red blood cells to UHF electromagnetic waves radiation using a novel micro-imaging technology.

    Science.gov (United States)

    Ruan, Ping; Yong, Junguang; Shen, Hongtao; Zheng, Xianrong

    2012-12-01

    Multiple state-of-the-art techniques, such as multi-dimensional micro-imaging, fast multi-channel micro-spetrophotometry, and dynamic micro-imaging analysis, were used to dynamically investigate various effects of cell under the 900 MHz electromagnetic radiation. Cell changes in shape, size, and parameters of Hb absorption spectrum under different power density electromagnetic waves radiation were presented in this article. Experimental results indicated that the isolated human red blood cells (RBCs) do not have obviously real-time responses to the ultra-low density (15 μW/cm(2), 31 μW/cm(2)) electromagnetic wave radiation when the radiation time is not more than 30 min; however, the cells do have significant reactions in shape, size, and the like, to the electromagnetic waves radiation with power densities of 1 mW/cm(2) and 5 mW/cm(2). The data also reveal the possible influences and statistical relationships among living human cell functions, radiation amount, and exposure time with high-frequency electromagnetic waves. The results of this study may be significant on protection of human being and other living organisms against possible radiation affections of the high-frequency electromagnetic waves.

  9. Towards Washable Wearable Antennas: A Comparison of Coating Materials for Screen-Printed Textile-Based UHF RFID Tags

    Directory of Open Access Journals (Sweden)

    Tiiti Kellomäki

    2012-01-01

    Full Text Available (Radio frequency identification RFID tags integrated into clothing enable monitoring of people without their conscious effort. This requires tags to be an unnoticeable part of clothing and comfortable to wear. In this study, RFID antennas were screen printed on two different fabrics, six different coating materials for the (integrated circuits ICs were applied, and the reliability of these RFID tags was tested with moisture and laundry tests. Generally, glue-type coating materials were easier to handle and could be spread precisely. All the tags were operational immediately after the coatings were applied, and five of the coating materials were seen to protect the IC from detaching in the laundry. It was found that the uneven fabric surface caused discontinuities and breaks in narrow conductors, and thus hard coatings may also be needed to keep the tag from breaking in laundry.

  10. Estimation of Relative Permittivity of Printed Circuit Board with Fiber Glass Epoxy as Dielectric for UHF Applications

    Directory of Open Access Journals (Sweden)

    Ronal D. Montoya-Montoya

    2013-11-01

    Full Text Available This paper presents the results of measuring relative permittivity of fiber glass printed circuit board (PCB’s, using a rectangular resonant cavity. The relative permittivity is presented as function of frequency. To obtain resonant frequencies, the return loss was measured using a network analyzer. Relative permittivity was calculated by finding frequencies of resonant cavity modes. The results are presented in a frequency span of 1 to 3.5GHz. It was clearly shown the nonlinear behavior of the relative permittivity for the dielectric laminate evaluated, even what happens respect to the frequency of the resonant modes below and above to frequency of 2 GHz.

  11. An Advanced VHF/UHF Short Range, Groundwave Propagation Model for Paths With Near-Earth Antennas

    National Research Council Canada - National Science Library

    Cross, Marshall W; Fung, Tat Y

    2006-01-01

    ... the earth such as: Unattended Ground Sensors (UGS) and Intelligent Munitions Systems (IMS), are attenuated above free space values by the lossy earth itself and any obstructions between a transmitter and receiver pair...

  12. Diurnal and seasonal variability of TKE dissipation rate in the ABL over a tropical station using UHF wind profiler

    CSIR Research Space (South Africa)

    Kalapureddy, MCR

    2007-04-01

    Full Text Available . The turbulent variance is related to e by the following equation given by White et al. (1999). � ¼ s3turbð4p=AÞ3=2J�3=2, (1) 0 and p=2 for both spherical coordinates j and f. J has to be solved numerically with an estimate of the mean wind speed provided...National Physical Laboratory, New Delhi, India fFrontier Observational Research System for Global Change, Yokohama, Japan Received 10 March 2006; received in revised form 30 October 2006; accepted 30 October 2006 Available online 16 January 2007 Abstract...

  13. Design of band-pass push-pull stages of power amplifiers for UHF transmitters of FM and TV broadcasting

    OpenAIRE

    Titov, A. A.

    2005-01-01

    The paper considers principles of construction, peculiarities of design, and techniques of network element calculation of push-pull amplification stages in linear bipolar microwave transistors. An example of calculation and results of experimental tests of an amplifier for transmitters of FM and TV broadcasting are presented.

  14. Uma dama argentina em terras yankees: os Recuerdos de viaje, de Eduarda Mansilla An argentinean lady in yankee land: the travel memoirs of Eduarda Mansilla

    Directory of Open Access Journals (Sweden)

    Stella Maris Scatena Franco

    2008-12-01

    Full Text Available Neste artigo analiso o relato de viagem da escritora argentina Eduarda Mansilla aos Estados Unidos, intitulado Recuerdos de viaje (1882. Integrante de uma camada social privilegiada e oriunda de uma família tradicional pertencente à elite política argentina, a autora expõe um ponto de vista particular sobre as condutas das norte-americanas com quem conviveu em sua viagem, mostrando com isso sua própria concepção sobre os papéis sociais femininos.In this article I analyze the account of a journey the Argentinean writer Eduarda Mansilla made to the United States, which she called Travel Memoirs (1882. Eduarda Mansilla was part of a privileged social class and came from a traditional family belonging to the political elite in Argentina, she exposed a particular point of view on the behavior of the North Americans who she lived with during her travel, unveiling her own conceptions on female social roles.

  15. Los promotores de la Orden del Císter en los reinos de Castilla y León: familias aristocráticas y damas nobles

    Directory of Open Access Journals (Sweden)

    Alonso Álvarez, Raquel

    2007-12-01

    Full Text Available The objective of this paper is the revision of the ways for those the Order of Císter in the Kingdoms of Castile and Leon was spread. With this purpose, a study of its promoters, and how the more important related with the Traba’s group are found, has been made. From this analysis it is deduced that the devotion to the new order was transmitted fundamentally through the aristocratic family nets. In adition, a new perspective to approach the knowledge of the medieval monasteries as conservatives of the family memoirs and the paper carried out by the noble women from Castile and Leon in this complex manorial net is proposed.

    El objetivo de este artículo es la revisión de los cauces por los que se difundió la Orden del Císter en los reinos de Castilla y León. Para ello, se ha hecho un estudio de sus promotores y de cómo se encuentran los más importantes relacionados con el grupo de los Traba. De este análisis se deduce que la devoción a la nueva orden fue transmitida fundamentalmente a través de las redes familiares aristocráticas. Además, se propone una nueva perspectiva para abordar el conocimiento de los monasterios medievales como conservadores de las memorias familiares y el papel desempeñado por las mujeres nobles castellano-leonesas en este complejo entramado señorial.

  16. Cuentos medievales: "La dama del castillo del gavilán" y el "Ejemplo de las flechas" Juan de Mandevilla, Libro de las maravillas del mundo

    Directory of Open Access Journals (Sweden)

    María Mercedes Rodríguez Temperley

    2003-11-01

    Full Text Available Taking account of the last studies about medieval tales, which intend to enlarge the corpus of stories standing not only in tale collections but in very different texts, those included in Juan de Mandevilla's Libro de las maravillas del mundo are here tracked and classified. Likewise, it is performed the punctual analysis of two tales: "The lady of the sparrowhawk castle" and the "Exemplum of the arrows".

  17. Séptima Conferencia de "Primeras Damas" de las Américas Seventh conference of wives of Presidents of the Americas

    Directory of Open Access Journals (Sweden)

    1998-06-01

    Full Text Available As has been done ever since 1990, when the First Conference of Wives of Presidents and Heads of State was held, first ladies and other women representing more than 30 countries as well as various national and international organizations met in Panama City on 8 and 9 October, 1997. The meeting was a forum for discussing how far the countries have come in the implementation of projects and programs for the benefit of the underprivileged and groups facing discrimination, such as women and children. Attention was brought to bear on the still existing gap between the protective legislation in existence and its enforcement, and there was a renewed commitment to continue to fight for greater equality and justice in the countries of the Americas. The meeting ended with the Panama Declaration, which summarizes the most pressing social goals and the action plan by means of which such goals will be pursued.

  18. Transmisión y exclusión del conocimiento en la Ilustración: Filosofía para Damas y Querelle des femmes

    Directory of Open Access Journals (Sweden)

    Roldán Panadero, Concha

    2008-06-01

    Full Text Available At the beginning of Modernity there was an increasing process of spreading, access, and popularization of knowledge. In this context, this paper stands two points: On the one hand, “philosophies for ladies”, made by men, in spite of their purpose of spreading scientific knowledge, represent the typical contradiction in Enlightment while pursuing the emancipation of humanity and the oppression of women. On the other hand, different essays about that “philosophies for ladies”, many of them due to women, show a “dispute of women” (querelle des femmes along the European republic of letters. This is the outcome of an early Enlightment and a counterpoint to the contradiction between the diffusion of knowledge to all mankind and the exclusion of women in this process. Taking into account someone “representative” of Enlightment ethics (Wolff, Kant, we explain the contradiction between theoria and praxis by means of the confrontation between ethics and anthropology. These querelle des femmes represents - as stressed by Celia Amorós - “an enlightment inside the enlightment” that rebuilds the link between theory and praxis, between ethics and anthropology.En el origen de la modernidad asistimos a un proceso creciente de difusión, accesibilidad y popularización de los saberes. En este contexto, el presente trabajo desarrolla dos tesis: Una, que las “filosofías para damas” escritas por varones al comienzo de la modernidad, al margen de su intención de difundir los conocimientos científicos, representan un buen ejemplo de las inconsecuencias de una Ilustración que persigue al mismo tiempo la emancipación de la humanidad y el dominio de las mujeres. Otra, que hay ensayos coetáneos de esas “filosofías para damas”, muchos de ellos escritos por mujeres, que muestran que hubo una “disputa de las mujeres” (querelle des femmes que surgió a la par que la república europea de las letras como efecto de una ilustración temprana y como contrapunto de sus contradicciones, al pretender al mismo tiempo la transmisión del conocimiento a todo el género humano y la exclusión de las mujeres de los cauces que se normalizaban para ello. Se mostrará, tomando fundamentalmente como ejemplo autores “modelo” de la ética ilustrada (Wolff, Kant, cómo el punto decisivo de esa contradicción entre theoria y praxis reside en el pulso que sostuvieron la ética y la antropología y cómo esa incipiente querelle representa –como ha subrayado Celia Amorós– “una ilustración dentro de la ilustración” que reconstruye ese puente entre teoría y práctica, entre ética y antropología

  19. Elisa Alicia Lynch: a Dama de Aço do Paraguai * Elisa Alicia Lynch: the Steel ‘S Lady of Paraguay

    OpenAIRE

    Frota, Luciara Silveira de Aragão e

    2015-01-01

    Este trabalho mostra uma nova visão da irlandesa Elisa Alicia Lynch, longe da figura de prostituta manipuladora que incitou o Marechal Solano López no começo da Guerra do Paraguai. Dentro de uma corrente revisionista histórica, apoiada em Marc Bloch, propõe uma nova análise de seu papel na vida de Solano López e do Paraguai, comentando a literatura sobre o assunto.

  20. Seasonal, annual and inter-annual features of turbulence parameters over the tropical station Pune (18°32' N, 73°51' E observed with UHF wind profiler

    Directory of Open Access Journals (Sweden)

    N. Singh

    2008-11-01

    Full Text Available The present study is specifically focused on the seasonal, annual and inter-annual variations of the refractive index structure parameter (Cn2 using three years of radar observations. Energy dissipation rates (ε during different seasons for a particular year are also computed over a tropical station, Pune. Doppler spectral width measurements made by the Wind Profiler, under various atmospheric conditions, are utilized to estimate the turbulence parameters. The refractive index structure parameter varies from 10−17.5 to 10−13 m−2/3 under clear air to precipitation conditions in the height region of 1.05 to 10.35 km. During the monsoon months, observed Cn2 values are up to 1–2 orders of magnitude higher than those during pre-monsoon and post-monsoon seasons. Spectral width correction for various non-turbulent spectral broadenings such as beam broadening and shear broadening are made in the observed spectral width for reliable estimation of ε under non-precipitating conditions. It is found that in the lower tropospheric height region, values of ε are in the range of 10−6 to 10−3 m2 s−3. In summer and monsoon seasons the observed values of ε are larger than those in post-monsoon and winter seasons in the lower troposphere. A comparison of Cn2 observed with the wind profiler and that estimated using Radio Sonde/Radio Wind (RS/RW data of nearby Met station Chikalthana has been made for the month of July 2003.

  1. Estudio de las mariposas en la Institución Educativa Las Damas del municipio de Calamar (Guaviare, Colombia, una estrategia en la búsqueda de conciencia ambiental.

    Directory of Open Access Journals (Sweden)

    Johan Gustavo Arenas Jaramillo (Página 79-95

    2009-07-01

    Full Text Available Este trabajo buscó generar una Conciencia Ambiental que mejorara las relaciones de los integrantes de la comunidad con su entorno, propiciando actitudes de responsabilidad, respeto y conservación del ambiente. Para ello, se propuso el estudio y cría de mariposas como estrategia en la Educación Ambiental de la escuela. Se utilizó la metodología de trabajo denominada cartografía social para identificar la forma en que los estudiantes se apropiaban de su entorno y se relacionaban con las mariposas. Durante el desarrollo de este estudio se logró poner en marcha procesos organizativos generando una dinámica de trabajo que posibilitó la sensibilización y constante participación de los diferentes actores que conforman la comunidad. Se realizaron salidas de campo las cuales fueron utilizadas como escenarios de aprendizaje donde se realizaron procesos de análisis y reflexión permitiendo a los niños, niñas y docentes reconocerse como actores principales, responsables de la transformación de su entorno, involucrando una mirada sistémica (cultural, social, política y económica.

  2. Dependent of electrical resistivity of thin wire on magnetic field and temperature; Vabastegi-ye moghavemat-e elekteriki-ye simha-ye barik be meidan-e meghnatisi va dama

    Energy Technology Data Exchange (ETDEWEB)

    Sadeghi, E [Yasouj University, Physics Department, Yasouj(Iran, Islamic Republic of); Zare, M [Shiraz Payam Noor University, shiraz(Iran, Islamic Republic of)

    2006-04-01

    Variation of electrical resistivity of Bismuth nano wire versus magnetic field the and temperature are considered. We study the size effect and surface scattering of the carrier in thin wire for systems with ellipsoidal Fermi surfaces. Results are in good agreement with experimental points.

  3. An Analysis of Military Use of Commercial Satellite Communications

    National Research Council Canada - National Science Library

    Forest, Benjamin D

    2008-01-01

    Since the Gulf War of 1991, United States military satellite communication (SATCOM) bandwidth demand has increased dramatically, as evidenced by recent usage rates in Operation Enduring Freedom and Operation Iraqi Freedom...

  4. A Short Take-Off/Vertical Landing (STOVL) Aircraft Carrier (S-CVX).

    Science.gov (United States)

    1998-05-01

    SHF ITP-Commercial SATCOM Voice, data & video to NCA GLOBIXS via GBS ITP-SHF ITP-Commercial SATCOM Table 4.4-2 S-CVX C4ISR Requirements 81...632 ZINC COATING 633 CATHODIC PROTECTION 634 DECK COVERINGS 635 HULL INSULATION 636 HULL DAMPING 637 SHEATHING 638 REFRIGERATION SPACES 639...633 CATHODIC PROTECTION 650 SERVICE SPACES 651 COMMISSARY SPACES 652 MEDICAL SPACES 655 LAUNDRY SPACES 656 TRASH DISPOSAL SPACES 660 WORKING

  5. Overview of NASA Glenn Aero/Mobile Communications Demonstrations

    Science.gov (United States)

    Brooks, David; Hoder, Doug; Wilkins, Ryan

    2004-01-01

    The Glenn Research Center at Lewis Field (GRC) has been involved with several other NASA field centers on various networking and RF communications demonstrations and experiments since 1998. These collaborative experiments investigated communications technologies new to aviation, such as wideband Ku satcom, L-band narrowband satcom, and IP (Internet Protocol), using commercial off-the-shelf (COTS) components These technologies can be used to distribute weather and hazard data, air traffic management and airline fleet management information, and passenger cabin Internet service.

  6. Overview of NASA Glenn Aero/Mobile Communication Demonstrations

    Science.gov (United States)

    Brooks, David; Hoder, Doug; Wilkins, Ryan

    2004-01-01

    The Glenn Research Center at Lewis Field (GRC) has been involved with several other NASA field centers on various networking and RF communications demonstrations and experiments since 1998. These collaborative experiments investigated communications technologies new to aviation, such as wideband Ku satcom, L-band narrowband satcom, and IP (Internet Protocol), using commercial off-the-shelf (COTS) components These technologies can be used to distribute weather and hazard data, air traffic management and airline fleet management information, and passenger cabin Internet service.

  7. Discharge against Medical Advice at Neonatal Intensive Care Unit in Gujarat, India.

    Science.gov (United States)

    Devpura, Bhanu; Bhadesia, Pranav; Nimbalkar, Somashekhar; Desai, Sandeep; Phatak, Ajay

    2016-01-01

    Objective . We explored reasons for discharged against medical advice (DAMA) of neonates from a neonatal intensive care unit (NICU) through in-depth interviews of the parents/guardians. Methods . Of 456 babies admitted to NICU during April 2014 to March 2015, 116 babies were DAMA. Parents of randomly selected 50 babies of these 116, residing within 50 kilometers, were approached for in-depth interviews at their homes. Audio recordings were done and manually transcribed, analyzed in detail to explore common threads leading to DAMA. Basic demographic information of the newborns was retrieved from hospital records. Results . The prevalence of DAMA was 25.4%. Of 50 parents approached, 41 in-depth interviews were completed. Nonaffordability (38.6%), no improvement (14.6%), poor prognosis (12%), and inappropriate behavior of the patient relation office personnel (10.6%) were major factors contributing to DAMA. Parents of 6.6% neonates wanted guarantee of survival and 5.3% parents reported poor behavior of nurses. No gender bias was observed related to DAMA. One-third of neonates (34.1%) were DAMA on first day of admission. Conclusions . The issue of DAMA needs attention. Besides nonaffordability and clinical characteristics of the baby, communication (breaking bad news, counseling, etc.) and lack of adequate infrastructure for relatives emerged as modifiable factors leading to DAMA.

  8. Discharge against Medical Advice at Neonatal Intensive Care Unit in Gujarat, India

    Directory of Open Access Journals (Sweden)

    Bhanu Devpura

    2016-01-01

    Full Text Available Objective. We explored reasons for discharged against medical advice (DAMA of neonates from a neonatal intensive care unit (NICU through in-depth interviews of the parents/guardians. Methods. Of 456 babies admitted to NICU during April 2014 to March 2015, 116 babies were DAMA. Parents of randomly selected 50 babies of these 116, residing within 50 kilometers, were approached for in-depth interviews at their homes. Audio recordings were done and manually transcribed, analyzed in detail to explore common threads leading to DAMA. Basic demographic information of the newborns was retrieved from hospital records. Results. The prevalence of DAMA was 25.4%. Of 50 parents approached, 41 in-depth interviews were completed. Nonaffordability (38.6%, no improvement (14.6%, poor prognosis (12%, and inappropriate behavior of the patient relation office personnel (10.6% were major factors contributing to DAMA. Parents of 6.6% neonates wanted guarantee of survival and 5.3% parents reported poor behavior of nurses. No gender bias was observed related to DAMA. One-third of neonates (34.1% were DAMA on first day of admission. Conclusions. The issue of DAMA needs attention. Besides nonaffordability and clinical characteristics of the baby, communication (breaking bad news, counseling, etc. and lack of adequate infrastructure for relatives emerged as modifiable factors leading to DAMA.

  9. Network Management System for Tactical Mobile Ad Hoc Network Segments

    Science.gov (United States)

    2011-09-01

    Protocol UFO UHF Follow-On UHF Ultra High Frequency USB Universal Serial Bus VHF Very High Frequency VIRT Valuable Information at the Right Time...military satellite system known as the UHF Follow-on system ( UFO ) only provides capacity for 600 concurrent users. DoD users also have commercial

  10. A Three Degrees of Freedom Test-Bed for Nanosatellite and CubeSat Attitude Dynamics, Determination, and Control

    Science.gov (United States)

    2009-12-01

    Tactical Imaging Nano-sat Yielding Small-Cost Operations and Persistent Earth-coverage UFO UHF Follow On UHF Ultra-High Frequency USCG United...replaced by UHF Follow On ( UFO ) satellites in the 1990s. The UFO satellites are being updated and scheduled for replacement by the Mobile User

  11. Calculations of Earth Penetrators Impacting Soils

    Science.gov (United States)

    1975-09-30

    time. In addition, the use of automatic rezoning permitted the problems to be run to completion without manually rezoning the computing grid. 2. THE...Department of t~w Army ATTN: 1. W. Apgar ATTN: DAMA-CSM-N, L.TC G. Ogden ATTN: Techical ILibrary Commander & Director ATTN: DAMA(CS) , MAJ A. (-leim I’S Army

  12. Ecological correlates of seed survival after ingestion by Fallow Deer

    NARCIS (Netherlands)

    Mouissie, AM; Van der Veen, CEJ; Veen, GF; Van Diggelen, R

    1. The survival and retention of seeds was studied by feeding known quantities of seeds of 25 species to four captive Fallow Deer (Dama dama L.). To test for ecological correlates, plant species were selected to represent large variation in seed size, seed shape, seed longevity and habitat

  13. Current information technology needs of small to medium sized apparel manufacturers and contractors

    Energy Technology Data Exchange (ETDEWEB)

    Wipple, C.; Vosti, E.

    1997-11-01

    This report documents recent efforts of the American Textile Partnership (AMTEX) Demand Activated Manufacturing Architecture (DAMA) Project to address needs that are characterized of small to medium sized apparel manufactures and contractors. Background on the AMTEX/DAMA project and objectives for this specific efforts are discussed.

  14. Pestivirus Exposure in Free-living and Captive Deer in Austria

    DEFF Research Database (Denmark)

    Krametter, Reinhild; Nielsen, Søren Saxmose; Loitsch, Angelika

    2004-01-01

    During the hunting season of 2001–02, blood and spleen samples from 59 red deer (Cervus elaphus), 77 roe deer (Capreolus capreolus), four fallow deer (Dama dama), and five chamois (Rupicapra rupicapra) were collected from nine hunting districts (n=133) and one deer farm (n=12) in southern Austria...

  15. Market opportunities in Canada for multimedia residential services in rural and small urban areas

    Science.gov (United States)

    Shariatmadar, Mehran; Narasimhan, Vasantha

    1995-01-01

    This paper reviews the studies which were undertaken jointly by Telesat and Industry Canada to provide an estimate of the market opportunities for residential multi-media services in the rural and small urban areas of Canada. This study is part of the Advanced Satcom program, a Ka-band satellite system proposal which is currently in the implementation proposal phase by the government and the Canadian space industry of which Telesat is an active member. Advanced Satcom extends the reach of terrestrial information highways to the remote and sparsely populated parts of the country in a cost-effective manner and thus provides a ubiquitous coverage of the information highways to all Canadians. Therefore, the rural and small urban markets are believed to be good opportunities for the Advanced Satcom. Although the results are primarily intended for fixed residential applications, they can also be used as input to market opportunity studies for wideband mobile applications.

  16. The Relationship Between Satisfaction with Complaint Handling and Repurchase Intentions: Detecting Moderating Influences in E-Tail

    Directory of Open Access Journals (Sweden)

    Mateus Nagel

    2017-01-01

    Full Text Available This paper examines which factors affect the relationship between consumers’ satisfaction with complaint handling and repurchase intentions. We present a conceptual framework that explains why satisfaction with complaint handling (SATCOM does not necessary lead to repurchase intention (RI for online shoppers. The authors test five moderating variables of the relationship between SATCOM and RI: relationship quality (relational factor, economic value, alternative attractiveness (marketplace factor, inferred motives and stability of the failure (failure-related factors. To test our hypotheses, we conducted an online survey with e-shoppers and used moderated regression analysis and a bootstrapping procedure. The findings show that all moderators help to explain the nonlinearity between SATCOM and RI. Hence, this study makes theoretical and managerial contributions related to failures in shopping experiences and repurchase intentions in e-tail.

  17. Proceedings of the Twentieth NASA Propagation Experimenters Meeting (NAPEX 20) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Miniworkshop

    Science.gov (United States)

    Golshan, Nasser (Editor)

    1996-01-01

    The NASA Propagation Experimenters (NAPEX) Meeting is convened each year to discuss studies supported by the NASA Propagation Program. Representatives from the satellite communications (satcom) industry, academia, and government who have an interest in space-ground radio wave propagation are invited to NAPEX meetings for discussions and exchange of information. The reports delivered at these meetings by program managers and investigators present recent activities and future plans. This forum provides an opportunity for peer discussion of work in progress, timely dissemination of propagation results, and close interaction with the satcom industry.

  18. Satellite communications network design and analysis

    CERN Document Server

    Jo, Kenneth Y

    2011-01-01

    This authoritative book provides a thorough understanding of the fundamental concepts of satellite communications (SATCOM) network design and performance assessments. You find discussions on a wide class of SATCOM networks using satellites as core components, as well as coverage key applications in the field. This in-depth resource presents a broad range of critical topics, from geosynchronous Earth orbiting (GEO) satellites and direct broadcast satellite systems, to low Earth orbiting (LEO) satellites, radio standards and protocols.This invaluable reference explains the many specific uses of

  19. Optimizing the Navy’s Investment in Space Professionals

    Science.gov (United States)

    2011-09-01

    UFO Ultra High Frequency Follow-On UHF Ultra High Frequency URL Unrestricted Line USA United States Army USAF United States Air Force USCYBERCOM...LEASAT), and eight UHF Follow-On ( UFO ) satellites all flying in geostationary orbit (GEO). NAVSOC is the principle Navy command that operates, manages...and maintains the DoD’s narrowband UHF capability from five different ground stations. The replacement satellite for the aging UFO system is the

  20. Toward cardiovascular MRI at 7 T: clinical needs, technical solutions and research promises

    International Nuclear Information System (INIS)

    Niendorf, Thoralf; Sodickson, Daniel K.; Krombach, Gabriele A.; Schulz-Menger, Jeanette

    2010-01-01

    To consider potential clinical needs, technical solutions and research promises of ultrahigh-field strength cardiovascular MR (CMR). A literature review is given, surveying advantages and disadvantages of CMR at ultrahigh fields (UHF). Key concepts, emerging technologies, practical considerations and applications of UHF CMR are provided. Examples of UHF CMR imaging strategies and their added value are demonstrated, including the numerous unsolved problems. A concluding section explores future directions in UHF CMR. UHF CMR can be regarded as one of the most challenging MRI applications. Image quality achievable at UHF is not always exclusively defined by signal-to-noise considerations. Some of the inherent advantages of UHF MRI are offset by practical challenges. But UHF CMR can boast advantages over its kindred lower field counterparts by trading the traits of high magnetic fields for increased temporal and/or spatial resolution. CMR at ultrahigh-field strengths is a powerful motivator, since speed and signal may be invested to overcome the fundamental constraints that continue to hamper traditional CMR. If practical challenges can be overcome, UHF CMR will help to open the door to new approaches for basic science and clinical research. (orig.)

  1. RFID技术在高校图书馆的应用与研究%RFID technology application and research in university library

    Institute of Scientific and Technical Information of China (English)

    王铁; 董四十九

    2012-01-01

    简要论述了RFID技术在高校图书馆的应用与研究,对UHF-RFID和HF-RFID技术在图书馆中的应用进行了比较,对UHF-RFID在未来图书馆发展中的作用进行了展望。%This paper briefly discussed the RFID technology application and research in university library, UHF-RFID and HF-RFID technology application in library were compared, put forward UHF-RFID development and its application prospects in future library.

  2. NJP VOLUME 40 No 1B

    African Journals Online (AJOL)

    Prof Ezechukwu

    2012-06-20

    Jun 20, 2012 ... which they pay outstanding bills before leaving hospital. Children who were DAMA in .... given to parental views and treatment moderated where possible but if conflict ... What make patients leave against medical advice? JTU.

  3. Results from PAMELA, ATIC and FERMI: Pulsars or dark matter?

    Indian Academy of Sciences (India)

    Historically, the first evidence for the unseen or dark matter was found in clusters of galaxies. ..... sensitivity to confirm/rule out the DAMA results. ... γ-ray flux sensitivity over previous experiments largely because of its superior rejection.

  4. Current information technology needs of small to medium sized apparel manufacturers and contractors

    Energy Technology Data Exchange (ETDEWEB)

    Wimple, C., LLNL

    1998-04-01

    This report documents recent efforts of the American Textile Partnership (AMTEX{sup TM}) Demand Activated Manufacturing Architecture (DAMA) Project to identify opportunities for cost effective enhanced information technology use by small to medium sized apparel manufacturers and contractors. Background on the AMTEX/DAMA project and objectives for the specific DAMA Small and Medium Enterprise (SME) effort are discussed in this section. The approach used to gather information about current opportunities or needs is outlined in Section 2 Approach, and relevant findings are identified and a brief analysis of the information gathered is presented in Section 3 Findings. Recommendations based on the analysis, are offered in Section 4 Recommendations, and plans are suggested for DAMA follow-on in Section 5 Future Plans. Trip reports for each of the companies visited are contained in Appendix E - Company Trip Reports. These individual reports contain the data upon which the analysis presented in Section 3 Findings is based.

  5. 77 FR 58084 - Endangered and Threatened Wildlife and Plants; 90-Day Findings on Petitions To Delist U.S...

    Science.gov (United States)

    2012-09-19

    ... mhorr) and Rio de Oro dama gazelle (G. d. lozanoi) were listed as endangered in their entirety, i.e... gazelle numbers fewer than 500. All three species are listed in Appendix I of the Convention on...

  6. Injection of Plasma Blobs into A Mirror Trap With Adiabatic Plasma Compression: ''ASPA'' Device; Injection d'Amas de Plasma dans un Piege a Miroirs avec Compression Adiaba Tique - Machine 'ASPA'; Inzhektsiya plazmennykh sgustkov v probochnuyu lovushku s adiabaticheskim szhatiem plazmy. Ustanovka ''ASPA''; Inyeccion de Plasmoides en una Trampa de Espejos con Compresion Adiabatica. La Instalacion 'ASPA'

    Energy Technology Data Exchange (ETDEWEB)

    Babichev, A. P.; Burjak, E. M.; Gorbunova, E. F.; Karchevskij, A. I.; Muromkin, Ju. A. [Institut Atomnoj Ehnergii, Im. I.V. Kurchatova, Moskva, SSSR (Russian Federation)

    1966-04-15

    The paper describes the main features of the ''ASPA'' device, designed for studies of the adiabatic compression of plasma in a magnetic mirror trap. The vacuum chamber is housed in a solenoid (4 m in length, 1 m in diameter) on whose axis there is a maximum quasi-stationary driving field of 5000 Oe. A titanium injector or co-axial plasma gun generates the deuterium plasma. The plasma blob is injected along the axis and enters the compression zone - a glass tube 10 cm in diameter. A pulsed mirror magnetic field is formed by two coils 20 cm apart (mirror ratio 1:2) ; the maximum pulsed mirror field is 40 kOe, its rise time approximately 40 {mu}s and decay time 350 {mu}s. The composition and energy distributions of the ion component of the plasma in the titanium and coaxial injectors were investigated by mass spectrometry. A microwave interferometer was used to measure , the density of the plasma blob as it moved from the injector to the compression zone. The authors also investigated the passage of the plasma blob through the magnetic mirrors at fields up to 20 kOe. In some experiments the mirror field was parallel to the driving magnetic field, whereas in others it was anti-parallel; in other words a field of the diverter type, with two regions of zero field, was formed. For both the titanium and the co-axial injectors, the injected plasma blob penetrated comparatively freely the magnetic mirror that was parallel to the guiding magnetic field, whereas it hardly penetrated at all when the field was of the diverter type. The authors have thus demonstrated the possibility of removing the heavy impurities from an injected blob by using a pulsed magnetic gate which forms regions of zero magnetic field and whose magnetic lines lead to the walls of the chamber. In provisional experiments on adiabatic plasma compression in a mirror trap, the authors found hard X-radiation (of 30 keV) and studied the effect of the initial magnetic field and the parameters of the plasma blob on the intensity and hardness of this radiation. (author) [French] Les auteurs decrivent les principales caracteristiques de la machine ASPA qui a ete construite en vue d'etudier la compression adiabatique du plasma dans un piege a miroirs magnetiques. La chambre a vide du dispositif se trouve dans un solenoiede (de 4 m de longueur et 1 m de diametre) sur l'axe duquel on peut creer un champ magnetique de guidage longitudinal quasi stationnaire d'une intensite maximum de 5 kOe. Pour produire le plasma, on a utilise un injecteur a.titane ou un canon a plasma coaxial. L'amas de plasma etait injecte le long de l'axe de l'installation et penetrait dans une zone de compression formee d'un tube en verre de 10 cm de diametre. Le champ magnetique a miroirs etait cree a l'aide de deux bobines distantes de 20. cm l'une de l'autre (rapport de miroir 1/2). Le champ magnetique puise maximum dans les miroirs s'elevait a 40 kOe, le temps de montee du champ a Tilde-Operator 40 {mu}s et son temps de chute a 350 {mu}s. La composition et la distribution selon l'energie de la composante ioniquedu plasma dans l'injecteur a titane et dans l'injecteur coaxial ont ete etudiees par spectroscopie de masse. A l'aide d'un interferometre a micro-ondes, ona mesure la densite de l'amasde plasma au cours de son deplacement de l'injecteur vers la zone de compression. On a egalement etudie le passage de cet amas a travers le piege a miroirs pour des champs de 20 kOe. Dans certaines experiences, le champ de miroir etait parallele au champ magnetique de guidage, alors que dans d'autres il etait antiparallele; en d'autres termes, un champ du type 'diverteur' se formait avec deux regions de champ nul. On montre que dans le cas de l'injecteur a titane, comme dans celui de l'injecteur coaxial, l'amas de plasma injecte passe assez facilement a travers le miroir magnetique lorsque la direction de celui-ci coincide avec celle du champ magnetique de guidage, alors qu'il ne le traverse pratiquement pas en presence d'un champ du type 'diverteur'. Sur la base de ces experiences, les auteurs montrent qu'il est possible d'eliminer les impuretes lourdes du plasma a l'aide d'une porte magnetique puisee qui cree des regions ou le champ magnetique est nul et ou les lignes de forces magnetiques rejoignent les parois de la chambre. Au cours des experiences preliminaires sur la compression adiabatique du plasma dans le piege a miroirs, les auteurs ont constate la presence de rayons X durs (de 30 keV) et etudie l'influence que le champ magnetique initial et les caracteristiques de l'amas de plasma exercent sur l'intensite et la durete de ces rayons. (author) [Spanish] En la memoria se explican las caracteristicas principales de la instalacion 'ASPA', construida para investigar la compresion adiabatica de un plasma en una trampa de espejo magnetico. La camara de vacio de la instalacion esta situada en un solenoide (4 m de longitud, 1 m de diametro)en cuyo eje puede crearse un campo magnetico cuasi estacionario longitudinal que actua de guia, de 5 kOe de intensidad maxima. Para generar el plasma de deuterio los autores utilizaron un inyector de titanio o un canon coaxial de plasma. Despues de ser inyectado a lo largo del eje de la instalacion, el plasmoide penetro en la region de compresion, formada por un tubo de vidrio de 10 cm de diametro. El campo magnetico pulsado, con una configuracion de espejo, se creo mediante dos bobinas situadas a 20 cm de distancia entre sf (la razon de espejo era de 1:2). La intensidad maxima del campo magnetico pulsado en los espejos era de 40 kOe, el tiempo de crecimiento del campo magnetico de Tilde-Operator 40 {mu}s, el tiempo de desintegracion del campo de 350 {mu}s. Los autores investigaron por espectrometria de masas la composicion y distribucion energetica del componente ionico del plasma en el. inyector de titanio y en el coaxial. Con ayuda de un interferometro de microondas midieron la densidad del plasmoide al pasar del inyector a la region de compresion. Investigaron tambien el paso del plasmoide a traves del espejo magnetico, para una intensidad del campo de 20 kOe como maximo. En algunos experimentos, el campo del espejo era paralelo al campo magnetico guia, en otros, antiparalelo, es decir, se creo un campo desviador con dos regiones de intensidad nula. Pudo comprobarse que el plasmoide inyectado (con un inyector de titanio o con uno coaxial) atraviesa con bastante facilidad el espejo magnetico cuando la direccion del campo del espejo coincide con la del campo magnetico guia, que no lo atraviesa cuando el campo es de tipo desviador. Basandose en estos experimentos, los autores demostraron la posibilidad de eliminar las impurezas pesadas de un plasma inyectado, utilizando una puerta magnetica pulsada que crea regiones en las que la intensidad del campo magnetico es nula y las lfneas.de fuerza magnetica se dirigen hacia las paredes de la camara. En los experimentos provisionales sobre compresion adiabatica del plasma en una trampa de espejo los autores observaron rayos X duros (de 30 keV de energia); investigaron la influencia ejercida por el campo magnetico inicial y los parametros del plasmoide sobre la intensidad y la dureza de estos rayos. (author) [Russian] Privedeny osnovnye harakteristiki ustanovki ''Aspa'', postroennoj dlja issledovanija adiabaticheskogo szhatija plazmy v lovushke s probochnoj-konfiguraciej magnitnogo polja. Vakuumnaja kamera ustanovki pomeshhaetsja v solenoide (dlina 4 metra, diametr 1 metr), na osi kotorogo mozhet sozdavat'sja prodol'noe vedushhee kvazistacionarnoe magnitnoe pole s naprjazhennost'ju do 5 kje. V kachestve istochnika dejterievoj plazmy ispol'zovalis' titanovyj inzhektor ili koaksial'naja plazmennaja pushka. Plazmennyj sgustok inzhektirovalsja vdol' osi ustanovki i postupal v rabochuju oblast' szhatija, kotoraja predstavljala soboj stekljannuju trubu diametrom 10 sm. Impul'snoe magnitnoe pole probochnoj konfiguracii sozdavalos' dvumja katushkami, rasstojanie mezhdu kotorymi 20 sm (probochnoe otnoshenie 1:2). Maksimal'naja naprjazhennost' impul'snogo magnitnogo polja v probkah sostavljaet 40 kje, vremja narastanija magnitnogo polja Tilde-Operator 40 mksek, a vremja spada polja 350 mksek. Provodilis' mass-spektrometricheskie issledovanija sostava i jenergeticheskih raspredelenij ionnoj komponenty plazmy v titanovom i koaksial'nom inzhektorah. S pomoshh'ju mikrovolnovogo interferometra izmerjalas' plotnost' plazmennogo sgustka pri ego dvizhenii ot inzhektora k rabochej oblasti szhatija. Issledovalos', takzhe, prohozhdenie plazmennogo sgustka cherez magnitnuju probku s naprjazhennost'ju polja do 20 kje. V odnih opytah pole probki bylo parallel'no vedushhemu magnitnomu polju, a v drugih - antiparallel'no, t.e. sozdavalos'' pole divertornogo tipa s dvumja oblastjami nulevoj naprjazhennosti polja. Pokazano, chto inzhektiruemyj plazmennyj sgustok (kak dlja titanovogo, tak i dlja koaksial'nogo inzhektorov) otnositel'no svobodno pronikaet cherez magnitnuju probku, kogda pole probki sovpadaet po napravleniju s vedushhim magnitnym polem; i prakticheski ne prohodit v sluchae polja divertornogo tipa. Na osnovanii jetih opytov pokazana vozmozhnost' otsechki tjazhelyh primesej inzhektiruemoj plazmy s pomoshh'ju impul'snogo magnitnogo zatvora, sozdajushhego oblasti s nulevoj naprjazhennost'ju magnitnogo polja i vyhodom magnitnyh silovyh linij na stenki kamery. V predvaritel'nyh jeksperimentah po adiabaticheskomu szhatiju plazmy v lovushke probochnoj konfiguracii zaregistrirovano zhestkoe rentgenovskoe izluchenie (jenergija 30 kjev) i issledovano vlijanie nachal'nogo magnitnogo polja i parametrov plazmennogo sgustka na intensivnost' i zhestkost' jetogo izluchenija. (author)

  7. GENIUS and the Genius TF: A New Observatory for WIMP Dark Matter and Neutrinoless Double Beta Decay

    OpenAIRE

    Klapdor-Kleingrothaus, H. V.; Majorovits, B.

    2001-01-01

    The GENIUS proposal is described and some of it's physics potential is outlined. Also in the light of the contradictive results from the DAMA and CDMS experiments the Genius TF, a new experimental setup is proposed. The Genius TF could probe the DAMA evidence region using the WIMP nucleus recoil signal and WIMP annual modulation signature simultaneously. Besides that it can prove the long term feasibility of the detector technique to be implemented into the GENIUS setup and will in this sense...

  8. Discharge against medical advice at a tertiary center in southeastern Nigeria: sociodemographic and clinical dimensions

    Directory of Open Access Journals (Sweden)

    Boniface Eze

    2010-09-01

    Full Text Available Boniface Eze1, Kenneth Agu2, Jones Nwosu31Department of Ophthalmology, 2Department of Surgery, 3Department of Otorhinolaryngology, University of Nigeria Teaching Hospital (UNTH, Ituku-Ozalla, Enugu, Enugu State, Nigeria Objective: To assess the sociodemographic and clinical characteristics of patients discharged against medical advice (DAMA at the University of Nigeria Teaching Hospital (UNTH, Enugu, Nigeria.Methods: The UNTH’s admission and discharge records between 1997 and 2006 were examined. Patients DAMA were identified; relevant sociodemographic and clinical data were extracted from their recalled clinical charts. Data were analyzed to generate rates, percentages, and proportions, and a level of P < 0.05 (one degree of freedom was considered statistically significant.Results: Of the 64,856 admissions (45.2% male, 54.8% female, 113 (0.002%; males: 54%, females: 46% were discharged against medical advice. DAMA rate was highest in Surgery (0.4%, and lowest in Obstetrics and Gynecology (0.1% and Pediatrics (0.1%. Infections (32.7%, trauma (29.2%, and cancer (16.8% were the leading diagnoses in patients DAMA. Financial constraints (37.2%, unsatisfactory response to treatment (17.7%, and dissatisfaction with hospital environment (15.0% were the main reasons for patients choosing to discharge themselves. DAMA was associated with a short admission period (P < 0.05, patients having high levels of formal education (P < 0.05, and those who had not been previously hospitalized (P < 0.05; but not with age (P = 0.398, gender (P = 0.489, or employment (P = 0.091.Conclusion: Comparatively, the rate of DAMA at UNTH is low. The causes of DAMA are preventable; for example, strengthening of the national health insurance scheme, enhancement of doctor-patient communication, and improvement of hospital environment would further reduce DAMA rate. Keywords: discharge against medical advice, tertiary center, sociodemographic characteristics, clinical

  9. DESIGNING A DATA GOVERNANCE MODEL BASED ON SOFT SYSTEM METHODOLOGY (SSM) IN ORGANIZATION

    OpenAIRE

    Hanung Nindito Prasetyo; Kridanto surendro

    2015-01-01

    Today, many emerging various models of data governance like DAMA, DGI and the latest is a model from IBM. Model DAMA International is a data governance model designed by industry associations. The model requires the fulfillment of the entire artifact in a matrix that has been determined that too many components that must be built in data governance in an organization. While the data governance model is built from the data DGI consulting organization which requires the development of data gove...

  10. An Analysis of Marine Corps Beyond Line of Sight Wideband Satellite Communications Requirements

    Science.gov (United States)

    2010-09-01

    Tactical SHF Satellite Terminal UFO ... what made it bearable. Stephen Musick: Thanks are due to my family and friends for their support and encouragement. I want to especially thank... what beyond LOS WB SATCOM capabilities the USMC requires in order to prepare for the future. A clear understanding of desired capabilities allows for

  11. Satellite Communications Industry

    Science.gov (United States)

    1993-04-01

    Ariane $loom SAJAC 1 Hughes Satellite Japan 06/94 $150m SAJAC 2 Hughes Satellite Japan -- (spare) $150m SatcomHl GE GE Americom /95 $50m SOLIDARIDAD ...1 Hughes SCT (Mexico) 11/93 Ariane $loom SOLIDARIDAD 2 Hughes SCT (Mexico) /94 $loom Superbird Al Loral Space Com Gp (Jap) 11/92 Ariane $175m

  12. NASA's Commercial Communication Technology Program

    Science.gov (United States)

    Bagwell, James W.

    1998-01-01

    Various issues associated with "NASA's Commercial Communication Technology Program" are presented in viewgraph form. Specific topics include: 1) Coordination/Integration of government program; 2) Achievement of seamless interoperable satellite and terrestrial networks; 3) Establishment of program to enhance Satcom professional and technical workforce; 4) Precompetitive technology development; and 5) Effective utilization of spectrum and orbit assets.

  13. 78 FR 72066 - 36(b)(1) Arms Sales Notification

    Science.gov (United States)

    2013-12-02

    ...-P [GRAPHIC] [TIFF OMITTED] TN02DE13.018 BILLING CODE 5001-06-C Transmittal No. 13-44 Notice of...), Identification Friend or Foe (IFF), Commercial Satellite Communications (SATCOM), Combined Enterprise Regional... Defense System Interrogator (ADSI), communications support equipment, information technology upgrades...

  14. 14 CFR 1.2 - Abbreviations and symbols.

    Science.gov (United States)

    2010-01-01

    ... instrument landing system. IM means ILS inner marker. INT means intersection. LDA means localizer-type... the touchdown zone area. SALS means short approach light system. SATCOM means satellite communications... configuration. V SWmeans speed at which onset of natural or artificial stall warning occurs. VTOSSmeans takeoff...

  15. System Architecture for Anti-Ship Ballistic Missile Defense (ASBMD)

    Science.gov (United States)

    2009-12-01

    Execute Search Search Function Link/SATCOM Info Operator Input Output Search Results D etect Function O rganic R esources Avail Receive Remote...Queue O rganic R esources N ot Avail Track Function D etect Function O rganic R esources Avail O rganic R esources N ot Avail Appendix C 153 4.1.2

  16. Suitability of Missions for the Air Force Reserve Components

    Science.gov (United States)

    2014-01-01

    Reporting System (RAIDRS), deploying transportable antennas worldwide to intercept and geolocate SATCOM jammers, electromagnetic interference, and...of providing space-related information to warfighters, enabling theater and reachback communications, geolocating space-system jammers or other...be reassigned anywhere other than as aircrew position indicator – aircraft commanders, pilots, and co-pilots ( API -1) pilots in operational units

  17. Frequency and causes of discharges against medical advice from hospital cardiac care units of East Azerbaijan, Iran

    Directory of Open Access Journals (Sweden)

    Saber Azami-Aghdash

    2016-05-01

    Full Text Available Introduction: Discharges against medical advice (DAMA is a common problem of hospitals that could lead increasing the complications and readmission. For this, the aim of this study is to investigate the frequency and effective factors of DAMA in patients with cardiovascular disease in hospital cardiac care units (CCU of East Azerbaijan, Iran. Methods: This cross-sectional study was performed, in 2013, in Tabriz University of Medical Sciences, Iran. Required information was extracted using valid and reliable forms of medical records of 2000 patients admitted to 20 CCU in 17 hospitals of East Azerbaijan, by two trained interviewers. Data analysis was performed using descriptive statistics (frequency, mean, percentage, etc., chi-square test, and linear regression model using the SPSS software. The tests were considered a statistically significant level of 0.05%. Results: The results showed that 272 patients (13.6% were DAMA from the hospital. The frequency of DAMA was in men more than women. The most frequency of discharge has occurred in the range of 40-80 years old. Results of linear regression showed that there was a significant correlation between DAMA and type of insurance, history of myocardial infarction (MI, comorbid disease, cause of hospitalization, location of hospital, and staying < 48 hours (P < 0.050. Conclusion: In this study, the rate of DAMA was relatively high compared with similar studies and it is considered as a concern problem that should study the reasons and its effective factors and plan effective interventions to reduce them.

  18. Army Communicator. Volume 37, Number 3, Fall 2012

    Science.gov (United States)

    2012-01-01

    today. From dismounted Special Operations Forces to the White House Communications Agency, UFO is used to provide reliable beyond line of sight...TCM-TR - Capability Manager for Tactical Radios TRADOC - U.S. Army Training and Doctrine Command UHF - Ultra High Frequency UFO - UHF Follow-On

  19. Benefits of a Space-Based Group System Architecture

    Science.gov (United States)

    2015-06-01

    Relay Satellite TRL Technology Readiness Level TT&C Telemetry, Tracking, and Control UFO UHF Follow-On xv ACKNOWLEDGMENTS I would like to...replacement with more advanced systems. An example of this addition was adding UHF Follow-On ( UFO ) satellite F11, as a gap filler between the UFO

  20. An Intelligent Sensor for the Ultra-High-Frequency Partial Discharge Online Monitoring of Power Transformers

    Directory of Open Access Journals (Sweden)

    Jian Li

    2016-05-01

    Full Text Available Ultra-high-frequency (UHF partial discharge (PD online monitoring is an effective way to inspect potential faults and insulation defects in power transformers. The construction of UHF PD online monitoring system is a challenge because of the high-frequency and wide-frequency band of the UHF PD signal. This paper presents a novel, intelligent sensor for UHF PD online monitoring based on a new method, namely a level scanning method. The intelligent sensor can directly acquire the statistical characteristic quantities and is characterized by low cost, few data to output and transmit, Ethernet functionality, and small size for easy installation. The prototype of an intelligent sensor was made. Actual UHF PD experiments with three typical artificial defect models of power transformers were carried out in a laboratory, and the waveform recording method and intelligent sensor proposed were simultaneously used for UHF PD measurement for comparison. The results show that the proposed intelligent sensor is qualified for the UHF PD online monitoring of power transformers. Additionally, three methods to improve the performance of intelligent sensors were proposed according to the principle of the level scanning method.

  1. Study on the Application of an Ultra-High-Frequency Fractal Antenna to Partial Discharge Detection in Switchgears

    Directory of Open Access Journals (Sweden)

    Chenguo Yao

    2013-12-01

    Full Text Available The ultra-high-frequency (UHF method is used to analyze the insulation condition of electric equipment by detecting the UHF electromagnetic (EM waves excited by partial discharge (PD. As part of the UHF detection system, the UHF sensor determines the detection system performance in signal extraction and recognition. In this paper, a UHF antenna sensor with the fractal structure for PD detection in switchgears was designed by means of modeling, simulation and optimization. This sensor, with a flat-plate structure, had two resonance frequencies of 583 MHz and 732 MHz. In the laboratory, four kinds of insulation defect models were positioned in the testing switchgear for typical PD tests. The results show that the sensor could reproduce the electromagnetic waves well. Furthermore, to optimize the installation position of the inner sensor for achieving best detection performance, the precise simulation model of switchgear was developed to study the propagation characteristics of UHF signals in switchgear by finite-difference time-domain (FDTD method. According to the results of simulation and verification test, the sensor should be positioned at the right side of bottom plate in the front cabinet. This research established the foundation for the further study on the application of UHF technique in switchgear PD online detection.

  2. Investigation of uranyl phosphite interaction with some amides

    International Nuclear Information System (INIS)

    Avduevskaya, K.A.; Ragulina, N.B.; Rozanov, I.A.; Mukhajlov, Yu.N.; Kanishcheva, A.S.; Grevtseva, T.G.

    1981-01-01

    Uranyl (amide) phosphitocomplexes of [UO 2 HPO 3 H 2 OAA]xH 2 O, [UO 2 HPO 3 (AA) 2 ], [UO 2 HPO 3 H 2 O DMC], [UO 2 HPO 3 H 2 ODMFA], [UO 2 HPO 3 DAMA] and UO 2 HPO 3 x2FAxH 2 O compositions, where AA-acetamide; DMC-N, N-dimetyl carbamide, DMFA-dimetyl formamide; DAMA-diamide of malonic acid; FA-formamide, are separated, identified and investigated. Derivatives of mono substituted uranyl phosphite of UO 2 (H 2 PO 3 ) 2 x2FA and [UO 2 (H 2 PO 3 ) 2 H 2 O]x2TMC composition (where TMC-tetramethyl carbamide), are synthesized. Structures of complexes with DAMA, TMC, DMFA and acid dimethyl-ammonium diphosphitouranylate-(CH 3 ] 2 NH 2 x[UO 2 (HPO 3 ) 3 (H 2 PO 3 )] are investigated [ru

  3. System architecture and operational analysis of medium displacement unmanned surface vehicle sea hunter as a surface warfare component of distributed lethality

    Science.gov (United States)

    2017-06-01

    systems would be easy to implement given that all they need is electrical power and a SATCOM feed so the human supervisor could arm the system and set...2 Figure 1. ACTUV during Initial Testing. Source: Jontz (2016). A. PURPOSE This thesis is a response to a general study topic request from the...based system engineering. For the purpose of this thesis , a specific system (the MDUSV) is presented as a solution. As such, there will not be the

  4. Mid-Latitude Mobile Wideband HF- NVIS Channel Analysis: Part 1

    Science.gov (United States)

    2017-09-14

    commercial satellite communications (SATCOM) for beyond line-of-sight (LOS) links. However, standard HF systems operating over a 3-kHz bandwidth do not...citation of trade names and names of names of manufacturers is not to be construed as official government endorsement or approval of commercial ...Division EXECUTIVE SUMMARY High frequency (HF) links (2 to 30 MHz) are an alternative to the cost and tactical fragility of commercial satellite

  5. Satellite and Ground Communication Systems: Space and Electronic Warfare Threats to the United States Army

    Science.gov (United States)

    2017-02-01

    as if SATCOM is guaranteed. This complacency is accompanied by the procurement of high-data communication and mission command systems that deny...threat. To overcome these significant vulnerabilities, the US Army must procure communications systems that maintain the information high ground, but...precious gift of our freedom.”1 A key element of remaining strong on the ground is maintaining the capability to effectively communicate on the ground. If

  6. VMLO: The Strategic, Operational and Tactical imperative for a Light Observation Squadron with the USMC

    Science.gov (United States)

    2012-06-01

    Improvised Explosive Device IFR Instrument Flight Rules IMC Instrument Meteorological Conditions IR Infrared ISAF International Security and...CAT 1 IFR Dual LOS/BLOS/USF/SATCOM Seaplane T/O < 2500 170 KIAS Cruise 25,000’ Service Ceiling Side Loading Cargo Door Minimum 8...overruns and uncertainty over what models of the F- 35 the Marines will use are jeopardizing their ability to provide organic CAS to units. 1. Rapid

  7. RF subsystem design for microwave communication receivers

    Science.gov (United States)

    Bickford, W. J.; Brodsky, W. G.

    A system review of the RF subsystems of (IFF) transponders, tropscatter receivers and SATCOM receivers is presented. The quantity potential for S-band and X-band IFF transponders establishes a baseline requirement. From this, the feasibility of a common design for these and other receivers is evaluated. Goals are established for a GaAs MMIC (monolithic microwave integrated circuit) device and related local oscillator preselector and self-test components.

  8. A Methodology For Measuring Resilience in a Satellite-Based Communication Network

    Science.gov (United States)

    2014-03-27

    Accessed 15 March 2013) Eremenko, P. & C. Roberts & O. Brown. “Cost Benefit Analysis of a Notional Fractionated SATCOM Architecture.” AIAA...http://www.dhs.gov/blog/2010/12/22/enhancing-critical-infrastructure- resilience (Accessed 15 March 2013) Keohane , Jonathan & Gail Rohrbach. “Ask an...rand/pubs/research_memoranda/2008/RM2778.pdf. (Accessed 5 August 2013) Miller, Robert D. “Computing the Area of a Spherical Polygon.” Graphic

  9. Original Research Original Research

    African Journals Online (AJOL)

    RAGHAVENDRA

    models over predicted the path losses, while Ericsson. However, Hata, Davidson ... planning tools, required by the radio network designer ... variability in VHF and UHF frequency band ...... Electronics and Computer Science (SCEECS), 2014.

  10. Functional screen printed radio frequency identification tags on flexible substrates, facilitating low-cost and integrated point-of-care diagnostics

    CSIR Research Space (South Africa)

    Smith, Suzanne

    2018-05-01

    Full Text Available This work explores the practical functionality of ultra-high frequency (UHF) radio frequency identification (RFID) tags screen printed onto various low-cost, flexible substrates. The need for integrated and automated low-cost point...

  11. GBS IOTE Feed Measurements

    National Research Council Canada - National Science Library

    Borge, T

    2001-01-01

    ...) package on UHF Follow-on (UFO) satellites, flights 8, 9, and 10. This terminal has been transferred to Lincoln Laboratory through the Milsatcom Joint Program Office at the USAF Space and Missile Center (AFSMC...

  12. ATBU Journal of Environmental Technology

    African Journals Online (AJOL)

    The journal of environmental technology is devoted to the publication of papers ... research results of both the natural; the technological; and the built environment. ... Assessment of multipath and shadowing effects on UHF band in built-up ...

  13. Global Broadcast Service Reach Back Via Satellite Tactical Digital Link J (S-TADIL J)

    National Research Council Canada - National Science Library

    Fenton, Sandra

    1999-01-01

    ...) to deployed forces via UHF Follow On (UFO) satellites during GBS Phase Two. The concept of Smart Push provides for most of the users' needs but cannot anticipate every need or emerging needs of the user...

  14. The Recording and Use of Off-Air French Television Programmes with Advanced Language Learners

    Science.gov (United States)

    Hill, J. K.

    1978-01-01

    Describes a program at the University of Kent in which UHF broadcasts on French television are taped on video cassettes for use in a variety of courses, including French language classes. Instructional uses of the video cassettes are discussed. (KM)

  15. Non-foster matching of an RFID antenna

    KAUST Repository

    Mohamed Hassan Salem, Nedime Pelin; Niver, Edip

    2011-01-01

    Novel designs of radio-frequency identification (RFID) tag antennas with better matching characteristics to achieve extended range for passive tags are investigated in ultra-high frequency (UHF) band. A microstrip dipole antenna with or without

  16. Nigerian Journal of Technology - Vol 32, No 2 (2013)

    African Journals Online (AJOL)

    Alternative First Principle Approach for Determination of Elements of Beam Stiffness ... Characterization of Propagation Path Loss at Vhf/Uhf Bands for Ilorin City, ... of Spatial Distribution Properties of Mid-Infrared Quantum Cascade Lasers at 7 ...

  17. Ja-nua-ry

    Indian Academy of Sciences (India)

    Hertz abbreviated Hz) experimentally produced electromag- netic waves .... factors. Radio waves with higher frequencies penetrate through ionosphere and escape from Earth. VHF/UHF ..... His Majesty, Edward VII, London, England. I n taking ...

  18. Multi-use Passive RFID Sensor Tag System for NASA, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — This proposal will provide NASA with a family of UHF RFID sensor tags and system components supporting very reliable, robust, convenient and economical deployment...

  19. Proceedings of the Twentieth NASA Propagation Experimenters Meeting (NAPEX XX) and the Advanced Communications Technology Satellite (ACTS) Propagation Studies Miniworkshop

    Science.gov (United States)

    Golshan, Nassar (Editor)

    1996-01-01

    The NASA Propagation Experimenters (NAPEX) Meeting and associated Advanced Communications Technology Satellite (ACTS) Propagation Studies Miniworkshop convene yearly to discuss studies supported by the NASA Propagation Program. Representatives from the satellite communications (satcom)industry, academia, and government with an interest in space-ground radio wave propagation have peer discussion of work in progress, disseminate propagation results, and interact with the satcom industry. NAPEX XX, in Fairbanks, Alaska, June 4-5, 1996, had three sessions: (1) "ACTS Propagation Study: Background, Objectives, and Outcomes," covered results from thirteen station-years of Ka-band experiments; (2) "Propagation Studies for Mobile and Personal Satellite Applications," provided the latest developments in measurement, modeling, and dissemination of propagation phenomena of interest to the mobile, personal, and aeronautical satcom industry; and (3)"Propagation Research Topics," covered a range of topics including space/ground optical propagation experiments, propagation databases, the NASA Propagation Web Site, and revision plans for the NASA propagation effects handbooks. The ACTS Miniworkshop, June 6, 1996, covered ACTS status, engineering support for ACTS propagation terminals, and the ACTS Propagation Data Center. A plenary session made specific recommendations for the future direction of the program.

  20. Cutter Connectivity Bandwidth Study

    Science.gov (United States)

    2002-10-01

    The goal of this study was to determine how much bandwidth is required for cutters to meet emerging data transfer requirements. The Cutter Connectivity Business Solutions Team with guidance front the Commandant's 5 Innovation Council sponsored this study. Today, many Coast Guard administrative and business functions are being conducted via electronic means. Although our larger cutters can establish part-time connectivity using commercial satellite communications (SATCOM) while underway, there are numerous complaints regarding poor application performance. Additionally, smaller cutters do not have any standard means of underway connectivity. The R&D study shows the most important factor affecting web performance and enterprise applications onboard cutters was latency. Latency describes the time it takes the signal to reach the satellite and come back down through space. The latency due to use of higher orbit satellites is causing poor application performance and inefficient use of expensive SATCOM links. To improve performance, the CC must, (1) reduce latency by using alternate communications links such as low-earth orbit satellites, (2) tailor applications to the SATCOM link and/or (3) optimize protocols used for data communication to minimize time required by present applications to establish communications between the user and the host systems.

  1. Bovine Tuberculosis in a Nebraska Herd of Farmed Elk and Fallow Deer: A Failure of the Tuberculin Skin Test and Opportunities for Serodiagnosis

    OpenAIRE

    Waters, W. Ray; Stevens, Gary E.; Schoenbaum, Mark A.; Orloski, Kathy A.; Robbe-Austerman, Suelee; Harris, N. Beth; Hall, S. Mark; Thomsen, Bruce V.; Wilson, Arach J.; Brannian, Roger E.; Nelson, Jeffrey T.; Schafer, Shawn; Esfandiari, Javan; Dutton, Meghan; Greenwald, Rena

    2011-01-01

    In 2009, Mycobacterium bovis infection was detected in a herd of 60 elk (Cervus elaphus) and 50 fallow deer (Dama dama) in Nebraska, USA. Upon depopulation of the herd, the prevalence of bovine tuberculosis (TB) was estimated at ∼71–75%, based upon histopathology and culture results. Particularly with elk, gross lesions were often severe and extensive. One year ago, the majority of the elk had been tested for TB by single cervical test (SCT), and all were negative. After initial detection of ...

  2. The AMTEX Partnership. Third quarterly report, FY 1995

    Energy Technology Data Exchange (ETDEWEB)

    Lemon, D.K.; Quisenberry, R.K. [AMTEX Partnership (United States)

    1995-06-01

    Key activities for the quarter were the initiation of tactical work on the OPCon Project, development of a draft of the AMTEX Policies and Procedures document, and a meeting of the Industry Technical Advisory Committee. A significant milestone was reached when a memorandum of understanding was signed between the DOE and The Department of Commerce. The agreement signified the official participation of the National Institute of Standards and Technology on the Demand Activated Manufacturing Architecture (DAMA) project in AMTEX. Project accomplishments are given for: computer-aided manufacturing, cotton biotechnology, DAMA, electronic embedded fingerprints, rapid cutting, sensors for agile manufacturing, and textile resource conservation.

  3. Cellular-based sea level gauge

    Digital Repository Service at National Institute of Oceanography (India)

    Desai, R.G.P.; Joseph, A.

    treaties with greater transparency. Among the various communication technologies used for real-time transmission of sea-level data are the wired telephone connection, VHF/UHF transceivers, satellite transmit terminals and cellular connectivity. Wired... telephone connections are severely susceptible to loss of connectivity during natural disasters such as storm surges, primarily because of telephone line breakage. Communication via VHF/UHF transceivers is limited by line-of-sight distance between...

  4. Unmanned Aircraft Systems Roadmap, 2005-2030

    Science.gov (United States)

    2005-01-01

    UCAV Unmanned Combat Air Vehicle ISS Integrated Sensor Suite UCS Unmanned Control System ITU International Telecommunications Union UFO UHF...RDC) at Groton, CT. These have included alien and drug interdiction along the Texas coast and in the Caribbean, UA launch and recovery systems...altitude aircraft and UA; and narrowband services to support mobile and handheld services as a replacement or follow-on for the UHF Follow-On ( UFO

  5. Mobile User Objective System (MUOS)

    Science.gov (United States)

    2015-12-01

    the current UHF Follow-On ( UFO ) constellation. MUOS includes the satellite constellation, a ground control and network management system, and a new...MUOS CAI. Each MUOS satellite carries a legacy payload similar to that flown on UFO -11. These legacy payloads will continue to support legacy...Antecedent Information The antecedent system to MUOS was the Ultra High Frequency (UHF) Follow-on ( UFO ) satellite communications program. Comparisons

  6. High Frontier: The Journal for Space and Missile Professionals. Volume 6, Number 2, February 2010

    Science.gov (United States)

    2010-02-01

    congressional testimony, MUOS, which was supposed to provide continuity for the nearly defunct ultrahigh frequency follow-on ( UFO ) satellites, is now about...of Leasat satellites provided UHF capac- ity in the period between FLTSATCOM’s end of life and the first UHF UFO system launch in 1993. The UFO ...Harris, the deputy chief of naval operations for communications Networks, told a Senate subcommittee this spring that by May 2010, the UFO

  7. Reasons Why Trauma Patients Request for Discharge against ...

    African Journals Online (AJOL)

    Conclusion: Cost of treatment and believe in traditional bone setters were the 2 main reasons why most patients with fracture DAMA. Measures to reduce the cost of treatment and patient's education about the dangers with unorthodox treatment of fractures and dislocations should help to reduce this behaviour.

  8. ISSN 2073-9990 East Cent. Afr. J. s East Cent. Afr. J. s

    African Journals Online (AJOL)

    dell

    Measures to reduce the cost of treatment and patient's education about the dangers with unorthodox treatment of fractures and dislocations should help to reduce this behaviour. Introduction. Discharge against medical advice (DAMA) describes a situation in which a patient chooses to leave the hospital before the treating ...

  9. The Bling Scandal

    DEFF Research Database (Denmark)

    Groes-Green, Christian

    2011-01-01

    a highly erotic concert performance in 2007 by the pregnant music star Dama Do Bling accentuated certain ideals of femininity and revealed a set of ideological contradictions concerning sexuality and femininity in Mozambique. ‘The Bling scandal’, as it was called, served as a can opener in terms of making...

  10. Browse Title Index

    African Journals Online (AJOL)

    O Diallo, D Kanikomo, M Camara, M Dama, O Coulibaly, B Kane, MS Diarra, Y Sogoba, H Traore, SB Badiane ... S Ghroubi, I Miladi, S Mefteh, O Kharrat, M Guermazi, E Turki, C Mhiri, M Elleuch .... VB Patel, A Motala, C Connally, IDP Burger.

  11. X-ray lines from dark matter: the good, the bad, and the unlikely

    DEFF Research Database (Denmark)

    Frandsen, Mads; Sannino, Francesco; M. Shoemaker, Ian

    2014-01-01

    are at the border of excluding this as an interpretation of the DAMA signal. The annihilating DM interpretation of the X-ray line is found to be in tension with CMB constraints. Lastly, a generalized version of decaying DM can account for the data with a lifetime exceeding the age of the Universe for masses...

  12. Discharge against medical advice in a pediatric emergency center in the State of Qatar

    Directory of Open Access Journals (Sweden)

    Hala Abdulateef

    2012-05-01

    Full Text Available Objective: The objective of this study was to analyze cases that had left the Pediatric Emergency Center Al Sadd, Doha (PEC against medical advice, with the aim of developing policies to help reduce this occurrence. Methodology: All patients that were admitted to the main PEC observation room for treatment and/or investigation and subsequently left against medical advice from February 18, 2007 to June 18, 2007, were followed by a phone call, and a questionnaire, which was completed by the departmental patient representative. Results: 99,133 patients attended the facility during the study period. Of those, 106 left the facility against medical advice. Ninety-four guardians were successfully contacted. 90% of the cases were in children below 2 years of age. In 87% of the cases the mother was the main decision maker for leaving against medical advice. Domestic obligations were the leading cause of DAMA (discharge against medical advice, reported in 45% of the cases. Respondents reported that the consequences of DAMA were well explained by medical staff before they left the facility however, they had not met with the departmental patient representative during their stay. Conclusion:As the majority of DAMA cases occurred in infants, medical staff should address the concerns of this group early on in the course of treatment. Maintaining communication and providing support, in particular for mothers of higher risk groups may help to reduce the rate of DAMA cases.

  13. Nigerian Journal of Animal Science - Vol 3, No 2 (2000)

    African Journals Online (AJOL)

    Cassava-poultry dropping block: A feed supplement for West African dwarf sheep · EMAIL FULL TEXT EMAIL FULL TEXT DOWNLOAD FULL TEXT ... Influence of lactation on some plasma biochemical parameters in N'dama and white Fulani cows · EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT ...

  14. Light Magnetic Dark Matter in Direct Detection Searches

    DEFF Research Database (Denmark)

    Del Nobile, Eugenio; Kouvaris, Christoforos; Panci, Paolo

    2012-01-01

    We study a fermionic Dark Matter particle carrying magnetic dipole moment and analyze its impact on direct detection experiments. In particular we show that it can accommodate the DAMA, CoGeNT and CRESST experimental results. Assuming conservative bounds, this candidate is shown not to be ruled out...

  15. About factors that determine trypanotolerance and prospects for ...

    African Journals Online (AJOL)

    Administrator

    resurgence of the disease has increased the imperative need for increasing trypanotolerance in livestock. ... estimated that 50 million cattle are at risk of becoming infected with ... nutritional status and stress of work as well as concurrent infections (Seck .... cross between N'Dama and Boran cattle could produce a synthetic ...

  16. The Gran Sasso muon puzzle

    CERN Document Server

    Fernandez-Martinez, Enrique

    2012-01-01

    We carry out a time-series analysis of the combined data from three experiments measuring the cosmic muon flux at the Gran Sasso laboratory, at a depth of 3800 m.w.e. These data, taken by the MACRO, LVD and Borexino experiments, span a period of over 20 years, and correspond to muons with a threshold energy, at sea level, of around 1.3 TeV. We compare the best-fit period and phase of the full muon data set with the combined DAMA/NaI and DAMA/LIBRA data, which spans the same time period, as a test of the hypothesis that the cosmic ray muon flux is responsible for the annual modulation detected by DAMA. We find in the muon data a large-amplitude fluctuation with a period of around one year, and a phase that is incompatible with that of the DAMA modulation at 5.2 sigmas. Aside from this annual variation, the muon data also contains a further significant modulation with a period between 10 and 11 years and a power well above the 99.9% C.L threshold for noise, whose phase corresponds well with the solar cycle: a s...

  17. ORF Alignment: NC_004307 [GENIUS II[Archive

    Lifescience Database Archive (English)

    Full Text Available NC_004307 gi|23466169 >1u94A 19 326 67 387 5e-28 ... ref|NP_696772.1| alkylation dama...ge repair protein [Bifidobacterium longum NCC2705] ... gb|AAN25408.1| alkylation damage repair protei

  18. ORF Alignment: NC_006087 [GENIUS II[Archive

    Lifescience Database Archive (English)

    Full Text Available NC_006087 gi|50955643 >1u94A 24 325 68 337 3e-32 ... ref|YP_062931.1| alkylation dama...ge DNA repair protein [Leifsonia xyli subsp. xyli ... str. CTCB07] gb|AAT89826.1| alkylation damage D

  19. Browse Title Index

    African Journals Online (AJOL)

    Items 401 - 450 of 591 ... Vol 12, No 1 (2014), Performance of weaner-calves of N'dama cattle fed varying levels of oil palm slurry as energy source, Abstract. MK Adewumi, JA Aderiye. Vol 4, No 1 (2006), Performance Of West African Dwarf Sheep Fed Diets Supplemented With Rare Earth Elements (Ree), Abstract. O A Adu ...

  20. Effects of enzyme additive on haematological and serum ...

    African Journals Online (AJOL)

    This study was conducted to determine the effects of an exogenous fibrolytic enzyme (ROXAZYME G®) on blood parameters of calves fed fresh grass and grass hay-based diets. Chemical composition of concentrate, fresh grass and grass-hay were determined. Sixteen crossbred (N'dama × Muturu) calves were subjected to ...

  1. Dark Matter Interference

    DEFF Research Database (Denmark)

    Del Nobile, Eugenio; Kouvaris, Christoforos; Sannino, Francesco

    2012-01-01

    We study different patterns of interference in WIMP-nuclei elastic scattering that can accommodate the DAMA and CoGeNT experiments via an isospin violating ratio $f_n/f_p=-0.71$. We study interference between the following pairs of mediators: Z and Z', Z' and Higgs, and two Higgs fields. We show ...

  2. 76 FR 5839 - Investigations Regarding Certifications of Eligibility To Apply for Worker Adjustment Assistance

    Science.gov (United States)

    2011-02-02

    ... Southfield, MI........ 01/10/11 12/20/10 80 (Workers). 75077 Dama Jewelry Technology, Johnston, RI 01/10/11...). 75079 Thomasville Furniture Appomattox, VA........ 01/11/11 01/07/11 Industries Inc. (Company). 75080 Esselte (State/One-Stop)... Mattoon, IL 01/11/11 01/07/11 75081 Crawford Furniture Jamestown, NY...

  3. Production porcine dans les fermes d'Etat à Ho-Chi-Minh Ville/Viet-nam

    Directory of Open Access Journals (Sweden)

    Franceschetto, ML.

    1983-01-01

    Full Text Available Pig production in State farms at Ho-Chi-Minh Ville. Vietnam. An inquiry carried out in Guinea has revealed that the disappearance of trypanotolerance within some local N'Dama cattle can not be attributed to the vaccination campaign initiated against infectious bovine pleuropneumonia but to diverse environmental and animal management factors prevalant in these areas.

  4. A Recommendation for a Professional Focus Area in Data Management for the IS2002 Information Systems Model Curriculum

    Science.gov (United States)

    Longenecker, Herbert E., Jr.; Yarbrough, David M.; Feinstein, David L.

    2010-01-01

    IS2002 has become a well defined standard for information systems curricula. The Data Management Association (DAMA 2006) curriculum framework defines a body of knowledge that points to a skill set that can enhance IS2002. While data management professionals are highly skilled individuals requiring as much as a decade of relevant experience before…

  5. Investigation of carrier mobility degradation effects on MOSFET leakage simulations

    CSIR Research Space (South Africa)

    Twala, B

    2016-01-01

    Full Text Available silicon germanium-on-insulator p-MOS FinFETs,” 72nd Device Research Conference 2014, pp. 183-184. [7] P. Damas, X. Le-Roux, D. Marris-Morini, E. Cassan, L.Vivien “Strained silicon for photonics applications,” 17th International Conference...

  6. Space Shuttle Underside Astronaut Communications Performance Evaluation

    Science.gov (United States)

    Hwu, Shian U.; Dobbins, Justin A.; Loh, Yin-Chung; Kroll, Quin D.; Sham, Catherine C.

    2005-01-01

    The Space Shuttle Ultra High Frequency (UHF) communications system is planned to provide Radio Frequency (RF) coverage for astronauts working underside of the Space Shuttle Orbiter (SSO) for thermal tile inspection and repairing. This study is to assess the Space Shuttle UHF communication performance for astronauts in the shadow region without line-of-sight (LOS) to the Space Shuttle and Space Station UHF antennas. To insure the RF coverage performance at anticipated astronaut worksites, the link margin between the UHF antennas and Extravehicular Activity (EVA) Astronauts with significant vehicle structure blockage was analyzed. A series of near-field measurements were performed using the NASA/JSC Anechoic Chamber Antenna test facilities. Computational investigations were also performed using the electromagnetic modeling techniques. The computer simulation tool based on the Geometrical Theory of Diffraction (GTD) was used to compute the signal strengths. The signal strength was obtained by computing the reflected and diffracted fields along the propagation paths between the transmitting and receiving antennas. Based on the results obtained in this study, RF coverage for UHF communication links was determined for the anticipated astronaut worksite in the shadow region underneath the Space Shuttle.

  7. 7T: Physics, safety, and potential clinical applications.

    Science.gov (United States)

    Kraff, Oliver; Quick, Harald H

    2017-12-01

    With more than 60 installed magnetic resonance imaging (MRI) systems worldwide operating at a magnetic field strength of 7T or higher, ultrahigh-field (UHF) MRI has been established as a platform for clinically oriented research in recent years. Profound technical and methodological developments have helped overcome the inherent physical challenges of UHF radiofrequency (RF) signal homogenization in the human body. The ongoing development of dedicated RF coil arrays was pivotal in realizing UHF body MRI, beyond mere brain imaging applications. Another precondition to clinical application of 7T MRI is the safety testing of implants and the establishment of safety concepts. Against this backdrop, 7T MRI and MR spectroscopy (MRS) recently have demonstrated capabilities and potentials for clinical diagnostics in a variety of studies. This article provides an overview of the immanent physical challenges of 7T UHF MRI and discusses recent technical solutions and safety concepts. Furthermore, recent clinically oriented studies are highlighted that span a broad application spectrum from 7T UHF brain to body MRI. 4 Technical Efficacy: Stage 1 J. Magn. Reson. Imaging 2017;46:1573-1589. © 2017 International Society for Magnetic Resonance in Medicine.

  8. Advanced Shipboard Communications Demonstrations with ACTS

    Science.gov (United States)

    Axford, Roy A.; Jedrey, Thomas C.; Rupar, Michael A.

    2000-01-01

    For ships at sea. satellites provide the only option for high data rate (HDR), long haul communications. Furthermore the demand for HDR satellite communications (SATCOM) for military and commercial ships. and other offshore platforms is increasing. Presently the bulk of this maritime HDR SATCOM connectivity is provided via C-band and X-band. However, the shipboard antenna sizes required to achieve a data rate of, say T 1 (1.544 Mbps) with present C-/X-band SATCOM systems range from seven to ten feet in diameter. This limits the classes of ships to which HDR services can be provided to those which are large enough to accommodate the massive antennas. With its high powered K/Ka-band spot beams, the National Aeronautics and Space Administration's (NASA) Advanced Communications Technology Satellite (ACTS) was able to provide T I and higher rate services to ships at sea using much smaller shipboard antennas. This paper discusses three shipboard HDR SATCOM demonstrations that were conducted with ACTS between 1996 and 1998. The first demonstration involved a 2 Mbps link provided to the seismic survey ship MN Geco Diamond equipped with a 16-inch wide, 4.5-inch tall, mechanically steered slotted waveguide array antenna developed by the Jet Propulsion Laboratory. In this February 1996 demonstration ACTS allowed supercomputers ashore to process Geco Diamond's voluminous oceanographic seismic data in near real time. This capability allowed the ship to adjust its search parameters on a daily basis based on feedback from the processed data, thereby greatly increasing survey efficiency. The second demonstration was conducted on the US Navy cruiser USS Princeton (CG 59) with the same antenna used on Geco Diamond. Princeton conducted a six-month (January-July 1997) Western Hemisphere solo deployment during which time T1 connectivity via ACTS provided the ship with a range of valuable tools for operational, administrative and quality-of-life tasks. In one instance, video

  9. Non-channel magnetron gun as the electron source for resonance linear accelerator

    International Nuclear Information System (INIS)

    Ivanov, G.M.; Makhnenko, L.A.; Cherenshchikov, S.A.

    1999-01-01

    Studies on the magnetron gun with a cold cathode being part of linear accelerator on the travelling wave are described. Two modes of the gun operation differing by presence of UHF field of the pre-buncher near the gun are observed. In the mode without UHF field the short (about 2 ns) pulses of accelerated electrons with amplitude up to 0.5 A at the gun current up to 20 A were obtained. The presence of UHF field near the gun makes it possible to obtain the beam of higher duration (up to 1.0 μs), but with current up to 20 mA at the accelerator outlet and up to 1 A at the gun outlet. The mechanism of the gun operation is concerned with the secondary-electron current increase and setting self-sustaining secondary emission. Gun characteristics under study are acceptable for the purposes of injection into accelerator [ru

  10. Comparison of multifrequency equatorial scintillation - American and Pacific sectors

    Science.gov (United States)

    Livingston, R. C.

    1980-08-01

    In this paper we examine the severity of radio wave amplitude scintillation measured at two stations near the equator but far separated in longitude: Kwajelein, Marshall Islands (167 E), and Ancon, Peru (-77 E). The data used are long-term observations of the Defense Nuclear Agency (DNA) Wideband satellite signal intensity at VHF, UHF, and L band frequencies. The seasonal behavior of the scintillation at the two stations is similar; each shows a broad 8- to 9-month disturbed season centered about local summer. There is short-term variability in the scintillation occurrence statistics but no clear equinoctial maxima. Little difference is observed in the occurrence or severity of L band scintillation at the two stations, although a systematic difference in the frequency dependence of the scintillation produces significantly stronger VHF and UHF scintillation at Ancon. The VHF and UHF latitudinal distributions of scintillation are asymmetric about the geomagnetic equator at both stations.

  11. Similarity transformed equation of motion coupled-cluster theory based on an unrestricted Hartree-Fock reference for applications to high-spin open-shell systems.

    Science.gov (United States)

    Huntington, Lee M J; Krupička, Martin; Neese, Frank; Izsák, Róbert

    2017-11-07

    The similarity transformed equation of motion coupled-cluster approach is extended for applications to high-spin open-shell systems, within the unrestricted Hartree-Fock (UHF) formalism. An automatic active space selection scheme has also been implemented such that calculations can be performed in a black-box fashion. It is observed that both the canonical and automatic active space selecting similarity transformed equation of motion (STEOM) approaches perform about as well as the more expensive equation of motion coupled-cluster singles doubles (EOM-CCSD) method for the calculation of the excitation energies of doublet radicals. The automatic active space selecting UHF STEOM approach can therefore be employed as a viable, lower scaling alternative to UHF EOM-CCSD for the calculation of excited states in high-spin open-shell systems.

  12. Status report on ECR stripped ion sources at CEN Grenoble

    International Nuclear Information System (INIS)

    Geller, R.; Jacquot, B.

    1980-12-01

    The MICROMAFIOS source described here is a small-scale version of SUPERMAFIOS; the confinement structure of the magnetic well of the stripper stage results from the superimposition of solenoidal magnetic fields upon a hexapolar magnetic field created by permanent SmCo 5 magnets. This innovation leads to a very compact ion source (approximatly 50 cm in length) which consumes < 100 kW of electric power (30 times less electricity than SUPERMAFIOS) and less than 2 kW of UHF power to create and heat the plasma. In addition, the coupling of the UHF waves to the plasma, has been simplified to the extreme. The incident wave is not polarised and the coupling is done in multimode cavities, whatever their shape. This eliminates the sophisticated technology of the profiled waveguides used in SUPERMAFIOS and the injection of the UHF power is made into the most convenient part of the multimode cavity

  13. Similarity transformed equation of motion coupled-cluster theory based on an unrestricted Hartree-Fock reference for applications to high-spin open-shell systems

    Science.gov (United States)

    Huntington, Lee M. J.; Krupička, Martin; Neese, Frank; Izsák, Róbert

    2017-11-01

    The similarity transformed equation of motion coupled-cluster approach is extended for applications to high-spin open-shell systems, within the unrestricted Hartree-Fock (UHF) formalism. An automatic active space selection scheme has also been implemented such that calculations can be performed in a black-box fashion. It is observed that both the canonical and automatic active space selecting similarity transformed equation of motion (STEOM) approaches perform about as well as the more expensive equation of motion coupled-cluster singles doubles (EOM-CCSD) method for the calculation of the excitation energies of doublet radicals. The automatic active space selecting UHF STEOM approach can therefore be employed as a viable, lower scaling alternative to UHF EOM-CCSD for the calculation of excited states in high-spin open-shell systems.

  14. ONR Far East Scientific Bulletin. Volume 12, Number 2, April-June 1987,

    Science.gov (United States)

    1987-06-01

    are oxidized strontium titanate as well as at least in part responsible for the out of TiO 2 . It appears that the TiO2 Japanese productivity. I saw...satcom equipment graduate students. There are 40 r.- at C and Ku bands; color TV transmit- specialists and 35 research institutes. - 4 ters; FM...RESOLUTION TEST CH4ART H~. AT AL BUREAU Of STANDARDS 1963 -A ’iwW -wW- % % . .*.. .. % - . . . . .* ** * ** * designed and built for a fishing 5 percent

  15. Space-based societal applications—Relevance in developing countries

    Science.gov (United States)

    Bhaskaranarayana, A.; Varadarajan, C.; Hegde, V. S.

    2009-11-01

    Space technology has the vast potential for addressing a variety of societal problems of the developing countries, particularly in the areas of communication, education and health sectors, land and water resources management, disaster management and weather forecasting. Both remote sensing and communication technologies can be used to achieve this goal. With its primary emphasis on application of space technology, on an end-to-end basis, towards national development, the Indian Space Programme has distinguished itself as one of the most cost-effective and development-oriented space programmes in the world. Developing nations are faced with the enormous task of carrying development-oriented education to the masses at the lower strata of their societies. One important feature of these populations is their large number and the spread over vast and remote areas of these nations, making the reaching out to them a difficult task. Satellite communication (Satcom) technology offers the unique capability of simultaneously reaching out to very large numbers, spread over vast areas, including the remote corners of the country. It is a strong tool to support development education. India has been amongst the first few nations to explore and put to use the Satcom technology for education and development-oriented services to the rural masses. Most of the developing countries have inadequate infrastructure to provide proper medical care to the rural population. Availability of specialist doctors in rural areas is a major bottleneck. Use of Satcom and information technology to connect rural clinics to urban hospitals through telemedicine systems is one of the solutions; and India has embarked upon an effective satellite-based telemedicine programme. Space technology is also useful in disaster warning and management related applications. Use of satellite systems and beacons for locating the distressed units on land, sea or air is well known to us. Indian Space Research Organisation

  16. Tunable Microwave Component Technologies for SatCom-Platforms

    Science.gov (United States)

    Maune, Holger; Jost, Matthias; Wiens, Alex; Weickhmann, Christian; Reese, Roland; Nikfalazar, Mohammad; Schuster, Christian; Franke, Tobias; Hu, Wenjuan; Nickel, Matthias; Kienemund, Daniel; Prasetiadi, Ananto Eka; Jakoby, Rolf

    2017-03-01

    Modern communication platforms require a huge amount of switched RF component banks especially made of different filters and antennas to cover all operating frequencies and bandwidth for the targeted services and application scenarios. In contrast, reconfigurable devices made of tunable components lead to a considerable reduction in complexity, size, weight, power consumption, and cost. This paper gives an overview of suitable technologies for tunable microwave components especially for SatCom applications. Special attention is given to tunable components based on functional materials such as barium strontium titanate (BST) and liquid crystal (LC).

  17. Infrared and millimeter waves v.15 millimeter components and techniques, pt.VI

    CERN Document Server

    Button, Kenneth J

    1986-01-01

    Infrared and Millimeter Waves, Volume 15: Millimeter Components and Techniques, Part VI is concerned with millimeter-wave guided propagation and integrated circuits. This book covers low-noise receiver technology for near-millimeter wavelengths; dielectric image-line antennas; EHF satellite communications (SATCOM) terminal antennas; and semiconductor antennas for millimeter-wave integrated circuits. A scanning airborne radiometer for 30 and 90 GHz and a self-oscillating mixer are also described. This monograph is comprised of six chapters and begins with a discussion on the design of low-n

  18. [The specific features of the development of metabolic and regenerative processes under the action of low-intensity electromagnetic radiation in radiation exposure conditions (an experimental study)].

    Science.gov (United States)

    Korolev, Yu N; Mihajlik, L V; Nikulina, L A; Geniatulina, M S

    The experiments on male white rats with the use of biochemical, photo-optical, and electron-microscopic techniques have demonstrated that the use of low-intensity electromagnetic radiation of ultrahigh frequency (EMR UHF) and low-intensity low-frequency magnetic field (MF) during the post-irradiation period (within 21 days after exposure to radiation) enhanced the metabolic and regenerative processes in the testes and liver. It was shown that the application of MF largely intensified the antioxidant activity whereas EMR UHF preferentially stimulated the biosynthetic processes as well as the processes of cellular and intracellular regeneration.

  19. Hole trapping at Al impurities in silica: A challenge for density functional theories

    DEFF Research Database (Denmark)

    Lægsgaard, Jesper; Stokbro, Kurt

    2001-01-01

    The atomic geometry and electronic structure around a neutral substitutional Al impurity in silica is investigated using either the unrestricted Hartree-Fock (UHF) approximation, or Beckes three-parameter hybrid functional (B3LYP). It is found that the B3LYP functional fails to describe...... the structural distortions around the Al impurity, while the UHF results are consistent with experimental information. We argue that the failure of the B3LYP functional is caused by the incomplete self-interaction cancellation usually present in density functional theories....

  20. The effect of materials properties on the Q of high Tc helical and coaxial resonators

    International Nuclear Information System (INIS)

    Peterson, G.E.; Fleming, D.A.; Johnson, D.W. Jr.; Rhodes, W.W.

    1990-01-01

    High T c helical and coaxial resonators have applications in U.H.F. radio receivers. We have employed a variety of techniques to study the superconducting materials used to form such resonators. These include, X-ray diffraction, SEM, density, dilatometry and sedigraph. We have correlated our data with resonator Q and frequency and have determined optimum conditions for highest Q. Our best resonators perform better than their all copper counterparts by a factor of 10 at 77K and at frequencies below 1,000 MHz. We have used these resonators in local oscillators and Butterworth filters in U.H.F. receivers

  1. Investigating a New Approach to Space-Based Information Networks

    Science.gov (United States)

    2012-09-01

    Tracking  and  Communications   UAV   Unmanned  Aerial  Vehicle   UFO   UHF  Follow  On   UHF   Ultra  High  Frequency   VBR...Follow on ( UFO ) and most recently the Mobile User Objective System (MUOS) Protected MILSATCOM is intended to support mobile users with very small...where it is needed. Ultra High Frequency Follow on ( UFO ) is currently the primary provider of narrowband communications for the military. The current

  2. Comparison of the efficacy of preoperative X-ray and thermoradiotherapy used for the treatment of breast cancer

    International Nuclear Information System (INIS)

    Muravskaya, G.V.; Pantyushenko, T.A.; Fradkin, S.Z.; Zhavrid, Eh.A.; Moiseenko, V.V.

    1984-01-01

    An experience of the first randomatized clinical investigation on the usage of different variants of preoperative X-ray (with simultaneous local UHF hyperthepmia and without it) action in the case of combined treatment of patients with breast cancer has been summarized. It has been shown that conventional values of preoperative X-ray therapy (about 30-45 G.) are optimum ones. An increase of complex thermoradiotherapy efficacy in the case of considered cancer forms may be achieved at the expense of a stre gthening of preoperative X-ray action by means of dose increase up to the cancerogenic level or preoperative irradiation under the conditions of local UHF-hyperthermia

  3. TV White spaces for wireless broadband in rural areas: the regulator, broadcaster and telecommunication(s) operator viewpoint

    CSIR Research Space (South Africa)

    Mfupe, LP

    2012-05-01

    Full Text Available Communications Authority of South Africa (ICASA) has recently conducted occupancy measurement audit of two Ultra High Frequency (UHF) radio spectrum bands: the 450 - 470 MHz and the 790- 862 MHz in major South African cities. The results from these audits..., such as 3GPP Long Term Evolution (LTE), to a possible operation in UHF TVWS bands is considered. In many cases, it is assumed that TVWS would be largely available in rural areas where broadband connectivity is rarely available. The LTE - Time Division...

  4. Inelastic dark matter

    International Nuclear Information System (INIS)

    Smith, David; Weiner, Neal

    2001-01-01

    Many observations suggest that much of the matter of the universe is nonbaryonic. Recently, the DAMA NaI dark matter direct detection experiment reported an annual modulation in their event rate consistent with a WIMP relic. However, the Cryogenic Dark Matter Search (CDMS) Ge experiment excludes most of the region preferred by DAMA. We demonstrate that if the dark matter can only scatter by making a transition to a slightly heavier state (Δm∼100 keV), the experiments are no longer in conflict. Moreover, differences in the energy spectrum of nuclear recoil events could distinguish such a scenario from the standard WIMP scenario. Finally, we discuss the sneutrino as a candidate for inelastic dark matter in supersymmetric theories

  5. Sluglett Peter with Weber Stefan (éd., Syria and Bilad al-Sham under Ottoman Rule. Essays in honour of Abdul-Karim Rafeq, Leyde, Brill, 2010, 633 p.

    Directory of Open Access Journals (Sweden)

    Catherine Mayeur-Jaouen

    2013-10-01

    Full Text Available Un an avant le printemps arabe de 2011 qui coïncida avec son quatre-vingtième annniversaire, le grand historien syrien Abdulkarim Rafeq s’était vu offrir en 2010 ce beau volume de Mélanges, fruit d’un colloque tenu en 2004 à Damas et à Beyrouth. La cohérence de l’œuvre de Rafeq (l’histoire du Bilād al-Shām ottoman à travers les archives dont il est un connaisseur hors pair comme le caractère bilingue de sa formation (Collège américain à Alep, Université syrienne à Damas, un doctorat à la SOA...

  6. Distribution of Arcanobacterium pluranimalium in animals examined in veterinary laboratories in the United Kingdom.

    Science.gov (United States)

    Foster, Geoffrey; Hunt, Brian

    2011-09-01

    Arcanobacterium pluranimalium was first reported in 2001 for 2 isolates, from a harbor porpoise (Phocoena phocoena) and a fallow deer (Dama dama). The same organism was subsequently reported from ovine material. A review of material submitted to veterinary laboratories in the United Kingdom from a range of domestic and wild animals during the following years revealed that A. pluranimalium had been recovered from ovine specimens on 33 occasions. Twenty ovine isolates came from abortion material, 5 from semen samples, 3 from abscesses, 3 from viscera, and 1 case each of navel ill and peritonitis. The only other A. pluranimalium isolate recovered during the period was from a milk sample collected from a cow with mastitis. The findings of the current study suggest that sheep were the host most frequently affected by infection with A. pluranimalium with recovery most commonly made from abortion material.

  7. Spectrum of antibody profiles in tuberculous elephants, cervids, and cattle.

    Science.gov (United States)

    Lyashchenko, Konstantin P; Gortázar, Christian; Miller, Michele A; Waters, W Ray

    2018-02-01

    Using multi-antigen print immunoassay and DPP ® VetTB Assay approved in the United States for testing captive cervids and elephants, we analyzed antibody recognition of MPB83 and CFP10/ESAT-6 antigens in Asian elephants (Elephas maximus) infected with Mycobacterium tuberculosis and in white-tailed deer (Odocoileus virginianus), fallow deer (Dama dama), elk (Cervus elaphus), and cattle (Bos taurus) infected with Mycobacterium bovis. Serum IgG reactivity to MPB83 was found in the vast majority of tuberculous cattle and cervid species among which white-tailed deer and elk also showed significant CFP10/ESAT-6 recognition rates with added serodiagnostic value. In contrast, the infected elephants developed antibody responses mainly to CFP10/ESAT-6 with MPB83 reactivity being relatively low. The findings demonstrate distinct patterns of predominant antigen recognition by different animal hosts in tuberculosis. Copyright © 2017 Elsevier B.V. All rights reserved.

  8. Global interpretation of direct Dark Matter searches after CDMS-II results

    International Nuclear Information System (INIS)

    Kopp, Joachim; Schwetz, Thomas; Zupan, Jure

    2010-01-01

    We perform a global fit to data from Dark Matter (DM) direct detection experiments, including the recent CDMS-II results. We discuss possible interpretations of the DAMA annual modulation signal in terms of spin-independent and spin-dependent DM-nucleus interactions, both for elastic and inelastic scattering. We find that for the spin-dependent inelastic scattering off protons a good fit to all data is obtained. We present a simple toy model realizing such a scenario. In all the remaining cases the DAMA allowed regions are disfavored by other experiments or suffer from severe fine tuning of DM parameters with respect to the galactic escape velocity. Finally, we also entertain the possibility that the two events observed in CDMS-II are an actual signal of elastic DM scattering, and we compare the resulting CDMS-II allowed regions to the exclusion limits from other experiments

  9. Halo-independent methods for inelastic dark matter scattering

    International Nuclear Information System (INIS)

    Bozorgnia, Nassim; Schwetz, Thomas; Herrero-Garcia, Juan; Zupan, Jure

    2013-01-01

    We present halo-independent methods to analyze the results of dark matter direct detection experiments assuming inelastic scattering. We focus on the annual modulation signal reported by DAMA/LIBRA and present three different halo-independent tests. First, we compare it to the upper limit on the unmodulated rate from XENON100 using (a) the trivial requirement that the amplitude of the annual modulation has to be smaller than the bound on the unmodulated rate, and (b) a bound on the annual modulation amplitude based on an expansion in the Earth's velocity. The third test uses the special predictions of the signal shape for inelastic scattering and allows for an internal consistency check of the data without referring to any astrophysics. We conclude that a strong conflict between DAMA/LIBRA and XENON100 in the framework of spin-independent inelastic scattering can be established independently of the local properties of the dark matter halo

  10. Dynamics of game from 65 Giera aria Forest District Lunca Timisului in 2009-2013 period

    Directory of Open Access Journals (Sweden)

    Dorel Dronca

    2014-10-01

    Full Text Available Integration of the Romania in the E.U., is imposing a special attention to game populations. The aim of the present paper was to study the quantitative evolution of the game for the 13 species during 2009-2013, on the hunting terrain 65 Giera, from Forest Domain – Lunca Timişului, with a total surface of 11,974 ha. The study shows that form the 13 species monitored, 3 were not identified on this hunting terrain Red Deer (Cervus elaphus L., Fallow Deer (Dama dama L, European Pine Marten (Martes martes L.. For the other species identified the population evolution in number demonstrated that there is a god correlation between the number of individuals and its biogenic capacity. We recommend careful monitoring of the natural selection and the efficient use of artificial breeding especially for the European hare (Lepus europaeus P. specie.

  11. Weber Stefan, Damascus. Ottoman Modernity and Urban Transformation, 1808-1918, Aarhus, Aarhus University Press, 2009, 2 volumes, 464 + 664 p., 7 planches.

    Directory of Open Access Journals (Sweden)

    Brigitte Marino

    2013-01-01

    Full Text Available Cet ouvrage monumental en deux volumes est issu d’une thèse de doctorat que Stefan Weber a élaborée alors qu’il était membre du Deutsche Archäologische Institut (DAI, à Damas, et soutenue à l’Université de Berlin en 2001. Comme ses prédécesseurs allemands –d’abord K. Wulzinger et C. Watzinger (1924, puis D. Sack (1989 –, l’auteur apporte une importante contribution à notre connaissance de la ville de Damas. Il s’interroge sur la modernité ottomane qui a transformé la ville au cours du xixe...

  12. Search for magnetic inelastic dark matter with XENON100

    Energy Technology Data Exchange (ETDEWEB)

    Aprile, E.; Anthony, M. [Physics Department, Columbia University, New York, NY 10027 (United States); Aalbers, J.; Breur, P.A.; Brown, A. [Nikhef and the University of Amsterdam, Science Park, 1098XG Amsterdam (Netherlands); Agostini, F.; Bruno, G. [INFN-Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, 67100 L' Aquila (Italy); Alfonsi, M. [Institut für Physik and Exzellenzcluster PRISMA, Johannes Gutenberg-Universität Mainz, 55099 Mainz (Germany); Amaro, F.D. [LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra (Portugal); Arneodo, F.; Benabderrahmane, M.L. [New York University Abu Dhabi, Abu Dhabi (United Arab Emirates); Barrow, P.; Baudis, L. [Physik-Institut, University of Zurich, 8057 Zurich (Switzerland); Bauermeister, B.; Calvén, J. [Oskar Klein Centre, Department of Physics, Stockholm University, AlbaNova, Stockholm SE-10691 (Sweden); Berger, T.; Brown, E. [Department of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180 (United States); Bruenner, S. [Max-Planck-Institut für Kernphysik, 69117 Heidelberg (Germany); Budnik, R. [Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 7610001 (Israel); Bütikofer, L., E-mail: lukas.buetikofer@lhep.unibe.ch, E-mail: xenon@lngs.infn.it [Physikalisches Institut, Universität Freiburg, 79104 Freiburg (Germany); and others

    2017-10-01

    We present the first search for dark matter-induced delayed coincidence signals in a dual-phase xenon time projection chamber, using the 224.6 live days of the XENON100 science run II. This very distinct signature is predicted in the framework of magnetic inelastic dark matter which has been proposed to reconcile the modulation signal reported by the DAMA/LIBRA collaboration with the null results from other direct detection experiments. No candidate event has been found in the region of interest and upper limits on the WIMP's magnetic dipole moment are derived. The scenarios proposed to explain the DAMA/LIBRA modulation signal by magnetic inelastic dark matter interactions of WIMPs with masses of 58.0 GeV/c{sup 2} and 122.7 GeV/c{sup 2} are excluded at 3.3 σ and 9.3 σ, respectively.

  13. Accumulation of polonium 210Po in tissues and organs of deer carvidae from Northern Poland.

    Science.gov (United States)

    Skwarzec, Bogdan; Prucnal, Malgorzata

    2007-01-01

    This study was undertaken to provide information on accumulation of polonium in tissues and organs of deer carvidae in order to assess the potential transport of this element via food-chain to game meat consumers. Livers, kidneys and muscles of large herbivorous animals belonging to three species: roe deer (Capreolus capreolus), red deer (Cervus elaphus) and fallow deer (Dama dama), collected in Northern Poland, were the subject of the present investigation. Activities of (210)Po were determined by means of alpha spectrometry along with relevant radiochemical procedures. The concentration of (210)Po in analyzed animals decreased in the order kidney > liver > muscle tissue. The average activity concentrations of (210)Po ranged between 0.02 +/- 0.01 Bq. kg(- 1) w.w. in muscles and 7.15 +/- 0.12 Bq. kg(- 1) w.w. in kidneys. Levels of polonium were not influenced by sampling location, sex, age and species of animals.

  14. The Effects of Tank Crew Turbulence on Tank Gunnery Performance

    Science.gov (United States)

    1978-09-01

    complete. Crewmen’s responses were converted to mouths for all itqms and tabulated for analysis. Because data was tabulated to two digits a maximum...two- digit data tabulation, mean and standard deviation statistics are somewhat conserva- tive for items 8, 9, and 10. There were 14-1S% of the TCs who...Benjamin Harrison. ATTN Libary I HQOA (DAMA-ARI I USAPACDC. Ft SBenjamuun Haritson, ATTN; ATCP-IHR I HOCIA OAPE HRE PO) IUSA Comrm- Elect Sch

  15. Evaluation of agronomic and fruit quality traits of fig tree varieties (Ficus carica L.) grown in Mediterranean conditions

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, C.; Serradilla, M.J.; Pérez-Gragera, F.; Martín, A.; Villalobos, M. C.; López-Corrales, M.

    2017-07-01

    In this work, the agronomic behaviour and fruit quality of ten varieties of common fig were evaluated for the establishment of new commercial orchards destined for fresh consumption. The following traits were measured: annual yield, cumulative yield, trunk cross sectional area (TCSA) and yield efficiency of each variety, as well as weight, width, total soluble solids (TSS), pH, titratable acidity (TA) and maturation index (MI) of brebas and figs. The results show that ‘Banane’ and ‘Brown Turkey’ were the earliest to enter into production, and ‘Banane’ showed the highest annual yield in the 7th green (2014), with 76 kg/tree, followed by ‘Brown Turkey’ (57.6 kg/tree), ‘Cuello Dama Blanco’ (52 kg/tree) and ‘Colar Elche’ (39 kg/tree). On the other hand, 'Cuello Dama Blanco' and 'De Rey' exhibited the better organoleptic traits, with TSS and MI values ranged from 18.7 ºBrix and 203.3 MI (‘Cuello Dama Blanco’) to 20.4 ºBrix and 187.1 MI (‘De Rey’) for brebas and from 21.4 ºBrix and 278.7 (‘Cuello Dama Blanco’) to 23.3 ºBrix and 255.6 (‘De Rey’) for figs. This study will allow the fruit grower to select the most interesting and appropriate range of varieties based on market needs taking into account the ripening season (early, middle or late) and fruit colour (green, purple or black).

  16. GENIUS-TF: a test facility for the GENIUS project

    OpenAIRE

    Baudis, L.; Dietz, A.; Heusser, G.; Majorovits, B.; Strecker, H.; Klapdor--Kleingrothaus, H. V.

    2000-01-01

    GENIUS is a proposal for a large scale detector of rare events. As a first step of the experiment, a small test version, the GENIUS test facility, will be build up at the Laboratorio Nazionale del Gran Sasso (LNGS). With about 40 kg of natural Ge detectors operated in liquid nitrogen, GENIUS-TF could exclude (or directly confirm) the DAMA annual modulation signature within about two years of measurement.

  17. Pituitary granulomatosis with polyangiitis

    OpenAIRE

    Slabu, Hannah; Arnason, Terra

    2013-01-01

    Granulomatosis with polyangiitis (GPA) is a small vessel vasculitis that can affect several organs, most commonly the respiratory tract and kidneys. Pituitary involvement is exceptionally rare. Most case reports of GPA of the pituitary gland have been described in middle-aged women who have concomitant ears, nose and throat involvement. The most frequent manifestation is diabetes insipidus due to a preponderance of posterior pituitary infiltration. The majority of cases sustain permanent dama...

  18. Exercise-Induced Muscle Damage and Hypertrophy: A Closer Look Reveals the Jury is Still Out

    OpenAIRE

    Schoenfeld, Brad; Contreras, Bret

    2018-01-01

    This letter is a response to the paper by Damas et al (2017) titled, “The development of skeletal muscle hypertrophy through resistance training: the role of muscle damage and muscle protein synthesis,” which, in part, endeavored to review the role of exercise-induced muscle damage on muscle hypertrophy. We feel there are a number of issues in interpretation of research and extrapolation that preclude drawing the inference expressed in the paper that muscle damage neither explains nor potenti...

  19. Refugee resettlement to the United States: recommendations for a new approach.

    Science.gov (United States)

    Westermeyer, Joseph John

    2011-08-01

    Hmong acculturation to the United States has involved high prevalence of several psychosocial challenges: acculturation failure, welfare dependency, psychiatric disorder, mistrust, malignant youth gangs, and violence. Conversely, resettlement of the Thai Dam-a tribal group, also from Laos-has gone remarkably well in comparison. Strategies used for resettlement of these two groups differed greatly. Based on these differences, the author recommends a refugee resettlement strategy aimed at improved mental health and optimal acculturation for future refugee groups.

  20. A combined wear-fatigue design methodology for fretting in the pressure armour layer of flexible marine risers

    OpenAIRE

    O'Halloran, S.M.; Shipway, P.H.; Connaire, A.D.; Leen, Sean B.; Harte, A.M.

    2017-01-01

    This paper presents a combined experimental and computational methodology for fretting wear-fatigue prediction of pressure armour wire in flexible marine risers. Fretting wear, friction and fatigue parameters of pressure armour material have been characterised experimentally. A combined fretting wear-fatigue finite element model has been developed using an adaptive meshing technique and the effect of bending-induced tangential slip has been characterised. It has been shown that a surface dama...

  1. Evaluation of agronomic and fruit quality traits of fig tree varieties (Ficus carica L.) grown in Mediterranean conditions

    International Nuclear Information System (INIS)

    Pereira, C.; Serradilla, M.J.; Pérez-Gragera, F.; Martín, A.; Villalobos, M. C.; López-Corrales, M.

    2017-01-01

    In this work, the agronomic behaviour and fruit quality of ten varieties of common fig were evaluated for the establishment of new commercial orchards destined for fresh consumption. The following traits were measured: annual yield, cumulative yield, trunk cross sectional area (TCSA) and yield efficiency of each variety, as well as weight, width, total soluble solids (TSS), pH, titratable acidity (TA) and maturation index (MI) of brebas and figs. The results show that ‘Banane’ and ‘Brown Turkey’ were the earliest to enter into production, and ‘Banane’ showed the highest annual yield in the 7th green (2014), with 76 kg/tree, followed by ‘Brown Turkey’ (57.6 kg/tree), ‘Cuello Dama Blanco’ (52 kg/tree) and ‘Colar Elche’ (39 kg/tree). On the other hand, 'Cuello Dama Blanco' and 'De Rey' exhibited the better organoleptic traits, with TSS and MI values ranged from 18.7 ºBrix and 203.3 MI (‘Cuello Dama Blanco’) to 20.4 ºBrix and 187.1 MI (‘De Rey’) for brebas and from 21.4 ºBrix and 278.7 (‘Cuello Dama Blanco’) to 23.3 ºBrix and 255.6 (‘De Rey’) for figs. This study will allow the fruit grower to select the most interesting and appropriate range of varieties based on market needs taking into account the ripening season (early, middle or late) and fruit colour (green, purple or black).

  2. Rivers, Rockets and Readiness: Army Engineers in the Sunbelt

    Science.gov (United States)

    1979-01-01

    at Proctor Lake. 138 Water sports are enjoyed at Benbrook Lake. 139 The powerhouse at Sam Rayburn Dam and Reservoir. 140 Amistad Dam - a...for the Fort Worth District. Th~ Fort Worth District designed the United States portion of the Amistad Dam--a cooperative effort with Mexico on the...Antonio Resident Office.17 Adding to the workload was the Amistad Dam located on the Rio Grande River about twelve miles above Del Rio, Texas. The

  3. Vigor of sunflower and soybean aging seed

    OpenAIRE

    Tatić M.; Balešević-Tubić S.; Ðorđević V.; Miklič V.; Vujaković M.; Ðukić V.

    2012-01-01

    Seed aging and deterioration affect seed vigor and viability. The characteristics of the chemical composition of oil crops seed are related to specific processes occurring in the seed during storage. This study was performed to examine the changes in seed vigor of different sunflower and soybean genotypes under controlled and conventional (uncontrolled) conditions of natural aging for six and twelve months. Obtained results show that the degree of seed dama...

  4. Archaeological and Historical Reconnaissance Survey of the Ugum River Valley, Guam, Mariana Islands,

    Science.gov (United States)

    1978-08-01

    important food plant in Micro- neisa; and betel nut (Areca catechu), chewed for its stimulant effect . Although feral yams (Dioscorea sp.) were not found...determining action required to mitigate the adverse effects of proposed dam construction and sub- sequent flooding of the upper Ugum River drainage. The dam...A:33). Plant identifications were made with reference to Stone (1970). Zone 1 is a mixed, broad- leafed , tropical forest (Fosberg’s Unit 2;. Tracey et

  5. Electron Pathways through Erythrocyte Plasma Membrane in Human Physiology and Pathology: Potential Redox Biomarker?

    OpenAIRE

    Matteucci, Elena; Giampietro, Ottavio

    2007-01-01

    Erythrocytes are involved in the transport of oxygen and carbon dioxide in the body. Since pH is the influential factor in the Bohr-Haldane effect, pHi is actively maintained via secondary active transports Na+/H+ exchange and HC3 -/Cl- anion exchanger. Because of the redox properties of the iron, hemoglobin generates reactive oxygen species and thus, the human erythrocyte is constantly exposed to oxidative damage. Although the adult erythrocyte lacks protein synthesis and cannot restore dama...

  6. Supplemental Grounding of Extended EMP Collectors.

    Science.gov (United States)

    1982-01-31

    G52AAXEX40602 H2590D as Contract DNA 001-80-C-0294. The program was monitored by Major Blair Williams, RAEE . The work described in this report was...ATTN: RAEE ATTN: DPOPM-COM-W-D ATTN RAAE ATTN: NATA Deputy Chief of Staff for Rsch Dev & Acq 4 cy ATTN: TITL ATTN: DAMA-CSS-N Defense Tech Info Ctr

  7. Contactless Diagnostics of Turbine Blade Vibration and Damage

    Czech Academy of Sciences Publication Activity Database

    Procházka, Pavel; Vaněk, František

    2011-01-01

    Roč. 305, č. 1 (2011), s. 1-11 E-ISSN 1742-6596. [International Conference on Damage Assessment of Structures (DAMAS 2011) /9./. Oxford, 11.07.2011-13.07.2011] Institutional research plan: CEZ:AV0Z20760514 Keywords : steam turbine * blade damage assessment * tip-timing method Subject RIV: JL - Materials Fatigue, Friction Mechanics http://iopscience.iop.org/1742-6596/305/1/012116

  8. Geological and Seismological Analysis of the 13 February 2001 Mw 6.6 El Salvador Earthquake: Evidence for Surface Rupture and Implications for Seismic Hazard

    OpenAIRE

    Canora Catalán, Carolina; Martínez Díaz, José J.; Villamor Pérez, María Pilar; Berryman, K.R.; Álvarez Gómez, José Antonio; Pullinger, Carlos; Capote del Villar, Ramón

    2010-01-01

    The El Salvador earthquake of 13 February 2001 (Mw 6.6) caused tectonic rupture on the El Salvador fault zone (ESFZ). Right-lateral strike-slip surface rupture of the east–west trending fault zone had a maximum surface displacement of 0.60 m. No vertical component was observed. The earthquake resulted in widespread landslides in the epicentral area, where bedrock is composed of volcanic sediments, tephra, and weak ignimbrites. In the aftermath of the earthquake, widespread dama...

  9. Foundations on Expansive Soils; A Review

    OpenAIRE

    Behzad Kalantari

    2012-01-01

    This study describes various types of foundation designs to be considered for structural engineering projects when the subsoil foundation consists of expansive or swelling soils. Among civil and architectural engineers expansive soils are known to be difficult foundation materials and problematic. These type of soils swell when they are subjected to moistures and shrink due to moisture loss. Because of this different behaviour upon wetting and drying, they cause minor to major structural dama...

  10. Search for dark matter by GENIUS-TF and GENIUS

    International Nuclear Information System (INIS)

    Klapdor-Kleingrothaus, H.V.

    2002-01-01

    The new project GENIUS will cover a wide range of the parameter space of predictions of SUSY for neutralinos as cold dark matter. Together with DAMA it will be the only experiment which can probe the seasonal modulation signal. Concerning hot dark matter GENIUS will be able to fix the (effective) neutrino mass with high accuracy. A GENIUS Test Facility has just been funded and will come into operation by end of 2002

  11. Understanding NaI(Tl) crystal background for dark matter searches

    Energy Technology Data Exchange (ETDEWEB)

    Adhikari, G.; Adhikari, P.; Kong, S.Y.; Oh, S.Y. [Sejong University, Department of Physics and Astronomy, Seoul (Korea, Republic of); Ha, C.; Jeon, E.J.; Kim, N.Y.; Lee, H.S.; Park, J.S.; Park, K.S. [Institute for Basic Science (IBS), Center for Underground Physics, Daejeon (Korea, Republic of); Kim, Y.D. [Institute for Basic Science (IBS), Center for Underground Physics, Daejeon (Korea, Republic of); Sejong University, Department of Physics and Astronomy, Seoul (Korea, Republic of)

    2017-07-15

    We have developed ultra-low-background NaI(Tl) crystals to reproduce the DAMA results with the ultimate goal of achieving purity levels that are comparable to or better than those of the DAMA/LIBRA crystals. Even though the achieved background level does not approach that of DAMA/LIBRA, it is crucial to have a quantitative understanding of the backgrounds. We have studied background simulations toward a deeper understanding of the backgrounds and developed background models for a 9.16-kg NaI(Tl) crystal used in the test arrangement. In this paper we describe the contributions of background sources quantitatively by performing Geant4 Monte Carlo simulations that are fitted to the measured data to quantify the unknown fractions of the background compositions. In the fitted results, the overall simulated background spectrum well describes the measured data with a 9.16-kg NaI(Tl) crystal and shows that the background sources are dominated by surface {sup 210}Pb and internal {sup 40}K in the 2-6-keV energy interval, which produce 2.4 counts/day/keV/kg (dru) and 0.5 dru, respectively. (orig.)

  12. Dipolar dark matter

    International Nuclear Information System (INIS)

    Masso, Eduard; Mohanty, Subhendra; Rao, Soumya

    2009-01-01

    If dark matter (DM) has nonzero direct or transition, electric or magnetic dipole moment then it can scatter nucleons electromagnetically in direct detection experiments. Using the results from experiments like XENON, CDMS, DAMA, and COGENT, we put bounds on the electric and magnetic dipole moments of DM. If DM consists of Dirac fermions with direct dipole moments, then DM of mass less than 10 GeV is consistent with the DAMA signal and with null results of other experiments. If on the other hand DM consists of Majorana fermions then they can have only nonzero transition moments between different mass eigenstates. We find that Majorana fermions with masses 38 χ < or approx. 100-200 GeV and mass splitting of the order of (150-200) keV can explain the DAMA signal and the null observations from other experiments and in addition give the observed relic density of DM by dipole-mediated annihilation. The absence of the heavier DM state in the present Universe can be explained by dipole-mediated radiative decay. This parameter space for the mass and for dipole moments is allowed by limits from L3 but may have observable signals at LHC.

  13. Porque Usía es condesa

    Directory of Open Access Journals (Sweden)

    Florentina Vidal Galache

    1998-01-01

    Full Text Available En el año 1840 los liberales destituyeron a la Real Junta de Damas de Honor y Mérito en la dirección de la Inclusa y del Colegio de Nuestra Señora de la Paz, donde se acogía a los expósitos de Madrid. Los liberales pensaban que el Estado se debía encargar de la ayuda a los necesitados y que la beneficencia no podía depender de la caridad privada, como venia sucediendo desde siglos atrás. Pero el intento de institucionalizar la beneficencia no obtuvo el éxito esperado y en 1848 los liberales repusieron a la Real Junta de Damas en la dirección de ambos orfelinatos.In 1840, the liberals dismissed the Real Junta de Damas de Honor y Mérito [Royal Board of Honor and Merit Ladies] from the management of ttie Inclusa [foundling hospital] and of the School of Our Lady of the Peace, where the foundlings of Madrid were given refuge. The liberals thought that the State should take charge of the assistance to those in need, and that the beneficence should not depend on the private charity, as it had happened during the previous centuries. But the attemp of institutionalizing the beneficence did not succeed as expected, so in 1848 the liberals reinstated the Royal Board of Ladies in the direction of the two orphanages.

  14. Comparison of Computational and Experimental Microphone Array Results for an 18%-Scale Aircraft Model

    Science.gov (United States)

    Lockard, David P.; Humphreys, William M.; Khorrami, Mehdi R.; Fares, Ehab; Casalino, Damiano; Ravetta, Patricio A.

    2015-01-01

    An 18%-scale, semi-span model is used as a platform for examining the efficacy of microphone array processing using synthetic data from numerical simulations. Two hybrid RANS/LES codes coupled with Ffowcs Williams-Hawkings solvers are used to calculate 97 microphone signals at the locations of an array employed in the NASA LaRC 14x22 tunnel. Conventional, DAMAS, and CLEAN-SC array processing is applied in an identical fashion to the experimental and computational results for three different configurations involving deploying and retracting the main landing gear and a part span flap. Despite the short time records of the numerical signals, the beamform maps are able to isolate the noise sources, and the appearance of the DAMAS synthetic array maps is generally better than those from the experimental data. The experimental CLEAN-SC maps are similar in quality to those from the simulations indicating that CLEAN-SC may have less sensitivity to background noise. The spectrum obtained from DAMAS processing of synthetic array data is nearly identical to the spectrum of the center microphone of the array, indicating that for this problem array processing of synthetic data does not improve spectral comparisons with experiment. However, the beamform maps do provide an additional means of comparison that can reveal differences that cannot be ascertained from spectra alone.

  15. Sadhana | Indian Academy of Sciences

    Indian Academy of Sciences (India)

    As a part of this facility, design of 20–30 kW UHF solid state power amplifiers is in progress. For this work, design procedure has been formulated for the development of solid state amplifier modules, radial combiner, divider and directional coupler; with specifications suited to RFM power system for particle accelerator.

  16. Fulltext PDF

    Indian Academy of Sciences (India)

    32 Our Footprints on the Sands of Time. Partha P Majumder and D Balasubramanian. ,>. 51 Transhorizon Radiowave Propagation due to. Evaporation Ducting. Inside Back Cover. The Effect of Tropospheric Weather Conditions on VHF and UHF Radio Paths Over the Sea. 5 D Gunashekar, D R Siddle and E M Warrington.

  17. Resonance – Journal of Science Education | Indian Academy of ...

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 1. Transhorizon Radiowave Propagation due to Evaporation Ducting - The Effect of Tropospheric Weather Conditions on VHF and UHF Radio Paths Over the Sea. Salil David Gunashekar D R Siddle E M Warrington. General Article Volume 11 ...

  18. Weekend Commercial Children's Television, 1975. A Study of Programming and Advertising to Children on Five Boston Stations.

    Science.gov (United States)

    Barcus, F. Earle

    Some 25-1/2 hours of Boston commercial television for children were monitored on a Saturday and Sunday in April 1975. The monitoring covered three network affiliated stations and two independent UHF stations. Monitoring, coding, and editing provided much statistical data, which was analyzed to yield findings in the areas of distribution of…

  19. 47 CFR 90.315 - Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16, 17...

    Science.gov (United States)

    2010-10-01

    ... in the 476-494 MHz band (TV Channels 15, 16, 17) in the Southern Louisiana-Texas Offshore Zone. 90... RADIO SERVICES PRIVATE LAND MOBILE RADIO SERVICES Authorization in the Band 470-512 MHz (UHF-TV Sharing) § 90.315 Special provisions governing use of frequencies in the 476-494 MHz band (TV Channels 15, 16...

  20. Introducing you to satellite operated data collection platforms (DCP).

    CSIR Research Space (South Africa)

    Stavropoulos, CC

    1977-09-01

    Full Text Available and operate in the VHF, UHF or microwave bands. By using a satellite as a repeater, large distances over land and sea can be covered with a single repeater in the sky. Trans-continental links for communication purposes have been operational for many years...

  1. HI absorption in 3C 49 and 3C 268.3 - Probing the environment of compact steep spectrum and GHz peaked spectrum sources

    NARCIS (Netherlands)

    Labiano, A; Vermeulen, RC; Barthel, PD; O'Dea, CP; Gallimore, JF; Baum, S; de Vries, W

    Aims. Localize and study the redshifted 21 cm H I absorption known to occur in the subgalactic sized compact steep spectrum galaxies 3C 49 and 3C 268.3. Methods. We carried out European VLBI Network UHF hand spectral line observations. Results. We have detected H I absorption towards the western

  2. High resolution anatomical and quantitative MRI of the entire human occipital lobe ex vivo at 9.4 T

    NARCIS (Netherlands)

    Sengupta, S.; Lagos Fritz, F.J.; Harms, R.L.; Hildebrand, S.; Tse, D.H.Y.; Poser, B.A.; Goebel, R.; Roebroeck, A.

    Several magnetic resonance imaging (MRI) contrasts are sensitive to myelin content in gray matter in vivo which has ignited ambitions of MRI-based in vivo cortical histology. Ultra-high field (UHF) MRI, at fields of 7 T and beyond, is crucial to provide the resolution and contrast needed to sample

  3. Self-Biased Differential Rectifier with Enhanced Dynamic Range for Wireless Powering

    KAUST Repository

    Ouda, Mahmoud H.; Khalil, Waleed; Salama, Khaled N.

    2016-01-01

    A self-biased, cross-coupled, differential rectifier is proposed with enhanced power-conversion efficiency over an extended range of input power. A prototype is designed for UHF 433MHz RF power-harvesting applications and is implemented using 0.18μm

  4. Compact printed two dipole array antenna with a high front-back ratio for ultra-high-frequency radio-frequency identification handheld reader applications

    DEFF Research Database (Denmark)

    Liu, Qi; Zhang, Shuai; He, Sailing

    2015-01-01

    A printed two-dipole array antenna with a high front-back ratio is proposed for ultra-high-frequency (UHF) radio-frequency identification handheld readers. The proposed antenna is a parasitic dual-element array with the ends of both elements folded back towards each other for additional coupling....

  5. Using NLDAS-2 for initializing integrated watershed models: Model spin-up for the AirMOSS Campaign

    Science.gov (United States)

    Airborne Microwave Observatory of Subcanopy and Subsurface (AirMOSS) investigation has been developed for high-resolution in time and space root-zone soil moisture and carbon estimation. AirMOSS will build an ultra-high frequency (UHF) synthetic aperture radar (SAR) that has the capability to penetr...

  6. A Simple Semaphore Signaling Technique for Ultra-High Frequency Spacecraft Communications

    Science.gov (United States)

    Butman, S.; Satorius, E.; Illott, P.

    2005-11-01

    For planetary lander missions such as the upcoming Phoenix mission to Mars, the most challenging phase of the spacecraft-to-ground communications is during the critical phase termed entry, descent, and landing (EDL). At 8.4 GHz (X-band), the signals received by the largest Deep Space Network (DSN) antennas can be too weak for even 1 bit per second (bps) and therefore not able to communicate critical information to Earth. Fortunately, the lander's ultra-high frequency (UHF) link to an orbiting relay can meet the EDL requirements, but the data rate needs to be low enough to fit the capability of the UHF link during some or all of EDL. On Phoenix, the minimum data rate of the as-built UHF radio is 8 kbps and requires a signal level at the Odyssey orbiter of at least minus 120 dBm. For lower signaling levels, the effective data rate needs to be reduced, but without incurring the cost of rebuilding and requalifying the equipment. To address this scenario, a simple form of frequency-shift keying (FSK) has been devised by appropriately programming the data stream that is input to the UHF transceiver. This article describes this technique and provides performance estimates. Laboratory testing reveals that input signal levels at minus 140 dBm and lower can routinely be demodulated with the proposed signaling scheme, thereby providing a 20-dB and greater margin over the 8-kbps threshold.

  7. Potential of RFID Systems to Detect Object Orientation

    DEFF Research Database (Denmark)

    Krigslund, Rasmus; Popovski, Petar; Pedersen, Gert Frølund

    2011-01-01

    In this paper we present a novel method for estimating the inclination of passive UHF RFID tags, for use in supply chains to monitor the handling of tagged items. Based on observations of the polarization, a Bayesian estimator of the tag inclination is constructed. The Bayesian estimator has been...

  8. Measuring the Interference at an RFID Tag: Where Does It Have an Impact?

    DEFF Research Database (Denmark)

    Krigslund, Rasmus; Popovski, Petar; Pedersen, Gert Frølund

    2011-01-01

    In this paper we consider reader collisions in an RFID system, especially how interference impacts the ability of a passive UHF tag to respond. We propose two innovative applications for using interference: 1) Blocking a tag response, and 2) cooperative reading of a tag. In order to investigate...

  9. The restricted Weyl group of the Cuntz algebra and shift endomorphism

    DEFF Research Database (Denmark)

    Conti, Roberto; Hong, Jeong Hee; Szymanski, Wojciech

    2012-01-01

    It is shown that, modulo the automorphisms which fix the canonical diagonal MASA point-wise, the group of those automorphisms of O_n which globally preserve both the diagonal and the core UHF-subalgebra is isomorphic, via restriction, with the group of those homeomorphisms of the full one-sided n...

  10. Adsorption of croconate dyes on TiO2 anatase (101) surface: A ...

    Indian Academy of Sciences (India)

    large amount of attention due to their potentially low- cost fabrication, easy ... which can be synthesized easily and possess features ... functions [6-311+G(d,p)] using the default integration ... the spin-projected UHF (PUHF) theory as. CD =.

  11. Calculation of vibrational excitation cross-sections in resonant ...

    Indian Academy of Sciences (India)

    WINTEC

    ample1–12 of enduring interest and the decay mechanism is popularly labeled as the ... sections in the e-CO scattering using a simple UHF. LCP for this system. ..... (DST), Government of India for partial financial support. References. 1.

  12. Spin contamination analogy, Kramers pairs symmetry and spin density representations at the 2-component unrestricted Hartree-Fock level of theory

    KAUST Repository

    Bučinský , Luká š; Malček, Michal; Biskupič, Stanislav; Jayatilaka, Dylan; Bü chel, Gabriel E.; Arion, Vladimir B.

    2015-01-01

    "Kramers pairs symmetry breaking" is evaluated at the 2-component (2c) Kramers unrestricted and/or general complex Hartree-Fock (GCHF) level of theory, and its analogy with "spin contamination" at the 1-component (1c) unrestricted Hartree-Fock (UHF

  13. Propagation predictions and verification for communication and radar

    CSIR Research Space (South Africa)

    Botha, L

    2006-02-01

    Full Text Available , but underestimates the loss at lower heights. As the terrain was covered with trees, it was suspected that at UHF frequencies, the effective ground height is the height of the tree tops. To test this theory, the height was changed to the tree top height and Figure...

  14. Atomic fusion, Gerrard atomic fusion

    International Nuclear Information System (INIS)

    Gerrard, T.H.

    1980-01-01

    In the approach to atomic fusion described here the heat produced in a fusion reaction, which is induced in a chamber by the interaction of laser beams and U.H.F. electromagnetic beams with atom streams, is transferred to a heat exchanger for electricity generation by a coolant flowing through a jacket surrounding the chamber. (U.K.)

  15. Exploiting phase measurements of EPC Gen2 RFID tags

    NARCIS (Netherlands)

    Huiting, J.; Flisijn, Hubert; Kokkeler, Andre B.J.; Smit, Gerardus Johannes Maria

    2013-01-01

    This paper presents a 2d localization system for UHF RFID tags. By measuring the phase between the transmitted continuous wave and received backscatter from the tag at different frequencies, it is possible to estimate the distance between the reader and tag. By determining distance estimates to

  16. Naval Space Forum. March-April 2010

    Science.gov (United States)

    2010-04-01

    UFO ) satellites reach the end of their on-orbit life. It also features a Lockheed Martin-built wideband code division multiple access payload that...variety of military satellite communications (milsatcom) programs, such as the UHF Follow-On ( UFO ) satellite network. Although the WGS satellites close

  17. Resonant Frequency Calculation and Optimal Design of Peano Fractal Antenna for Partial Discharge Detection

    Directory of Open Access Journals (Sweden)

    Jian Li

    2012-01-01

    Full Text Available Ultra-high-frequency (UHF approaches have caught increasing attention recently and have been considered as a promising technology for online monitoring partial discharge (PD signals. This paper presents a Peano fractal antenna for UHF PD online monitoring of transformer with small size and multiband. The approximate formula for calculating the first resonant frequency of the Peano fractal antenna is presented. The results show that the first resonant frequency of the Peano fractal antenna is smaller than the Hilbert fractal antenna when the outer dimensions are equivalent approximately. The optimal geometric parameters of the antenna were obtained through simulation. Actual PD experiments had been carried out for two typically artificial insulation defect models, while the proposed antenna and the existing Hilbert antenna were both used for the PD measurement. The experimental results show that Peano fractal antenna is qualified for PD online UHF monitoring and a little more suitable than the Hilbert fractal antenna for pattern recognition by analyzing the waveforms of detected UHF PD signals.

  18. Foliage penetration radar detection and characterization of objects under trees

    CERN Document Server

    Davis, Mark

    2011-01-01

    This book covers all aspects of foliage penetration (FOPEN) radar, concentrating on both airborne military radar systems as well as earth resource mapping radars. It is the first concise and thorough treatment of FOPEN, covering the results of a decade-long investment by DARPA in characterizing foliage and earth surface with ultrawideband UHF and VHF synthetic aperture radar (SAR).

  19. Communications During Critical Mission Operations: Preparing for InSight's Landing on Mars

    Science.gov (United States)

    Asmar, Sami; Oudrhiri, Kamal; Kurtik, Susan; Weinstein-Weiss, Stacy

    2014-01-01

    Radio communications with deep space missions are often taken for granted due to the impressively successful records since, for decades, the technology and infrastructure have been developed for ground and flight systems to optimize telemetry and commanding. During mission-critical events such as the entry, descent, and landing of a spacecraft on the surface of Mars, the signal's level and frequency dynamics vary significantly and typically exceed the threshold of the budgeted links. The challenge is increased when spacecraft shed antennas with heat shields and other hardware during those risky few minutes. We have in the past successfully received signals on Earth during critical events even ones not intended for ground reception. These included the UHF signal transmitted by Curiosity to Marsorbiting assets. Since NASA's Deep Space Network does not operate in the UHF band, large radio telescopes around the world are utilized. The Australian CSIRO Parkes Radio Telescope supported the Curiosity UHF signal reception and DSN receivers, tools, and expertise were used in the process. In preparation for the InSight mission's landing on Mars in 2016, preparations are underway to support the UHF communications. This paper presents communication scenarios with radio telescopes, and the DSN receiver and tools. It also discusses the usefulness of the real-time information content for better response time by the mission team towards successful mission operations.

  20. Development, test and flight results of the rf systems for the yes2 tether experiment

    NARCIS (Netherlands)

    Cucarella, Guillermina Castillejo; Cichocki, Andrzej; Burla, M.

    2008-01-01

    This paper highlights design, realization, testing and flight results of the Radio Frequency developments (RF) for ESA's second Young Engineers' Satellite (YES2), that included GPS systems, an intersatellite UHF link and a re-entry capsule telemetry and recovery system. The YES2 piggybacked on the

  1. Determination of the thermospheric neutral wind from incoherent scatter radar measurements

    International Nuclear Information System (INIS)

    Haeggstroem, I.; Murdin, J.; Rees, D.

    1984-11-01

    Measurements made by the EISCAT UHF incoherent scatter radar are used to derive thermospheric winds. The derived wind is compared to Fabry-Perot interferometer measurements of the neutral wind made simultaneously. The uncertainties in the radar derived wind are discussed. (author)

  2. A Systematic Software, Firmware, and Hardware Codesign Methodology for Digital Signal Processing

    Science.gov (United States)

    2014-03-01

    Division B.S., Fu-Jen Catholic University , 1979 M.S.E.E, California State University , Northridge, 1992 Submitted in partial fulfillment of the...Table 74. External trigger characteristics ......................................................................129 Table 75. DDC IP core...size weight and power UAV unmanned aerial vehicle UHF ultra-high frequency UML universal modeling language Verilog verify logic VHDL VHSIC

  3. Online calibration of high-frequency partial discharge signals in three-phase belted power cables

    NARCIS (Netherlands)

    Wouters, P.A.A.F.

    2005-01-01

    Partial discharge (PD) magnitudes from classical detection techniques are expressed in terms of apparent charges. Signals from HF/VHF/UHF techniques on substation components are often hard to express in this quantity because of complex signal excitation and propagation channels. A method to

  4. 77 FR 53184 - 36(b)(1) Arms Sales Notification

    Science.gov (United States)

    2012-08-31

    ... (C)] UHF/VHF secure radios with HAVE QUICK II are voice communications radio systems that can operate...): The CMDS is an integrated, threat-adaptive, software-programmable dispensing system capable of... missiles, and infrared (IR) guided missiles. The system is internally mounted and may be operated as a...

  5. Capstone Required System Characteristics

    OpenAIRE

    2004-01-01

    roll roll Interactive Media Element This interactive illustration provides information about the characteristics of satellite communication systems, and the characteristics associated with each of the four categories of space segment (constellation of communication satellites). The four categories are: Narrowband (UHF) , Wideband (SHF), Protected (EHF), CommercialSimple mouseover interactions are used to reveal individual pieces of information. SS3613 Military Satellite Communi...

  6. A pilot study of the efficacy of the POLARGEN® ultrahigh-frequency electric field (40.68 MHz) radiofrequency device in the treatment of facial contouring.

    Science.gov (United States)

    Kim, Miri; Lim, Jihong; Bae, Jung Min; Park, Hyun Jeong

    2017-11-01

    Various radiofrequency (RF) devices are used to treat skin laxity and face contouring, but few studies have examined ultrahigh-frequency (UHF) electric field (40.68 MHz) RF devices. To evaluate the efficacy and safety of a UHF electric field (40.68 MHz) RF device for skin tightening and face contouring. Ten patients each underwent four sessions of UHF electric field RF device treatment at 2-week intervals. Clinical improvement was evaluated with the patient satisfaction score using a six-point scale, and clinical photographs taken at every visit and 2 months after the RF treatment were assessed. Skin biopsies were obtained from one patient before the first treatment and immediately after the last treatment. Adverse reactions were recorded at every follow-up visit. All patients were women with a mean age of 51.7 ± 7.2 years. The mean satisfaction score was 4.5 ± 0.9 immediately after the last treatment session. Cheek, jawline, and neck enhancement and tightening were apparent in all patients. Side effects were minimal, and there were no burns or major complications. The UHF electric field RF device was effective for skin tightening and facial contouring, without significant adverse reactions.

  7. First principle calculations of effective exchange integrals: Comparison between SR (BS) and MR computational results

    Energy Technology Data Exchange (ETDEWEB)

    Yamaguchi, Kizashi [Institute for Nano Science Design Center, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka 560-8531, Japan and TOYOTA Physical and Chemical Research Institute, Nagakute, Aichi, 480-1192 (Japan); Nishihara, Satomichi; Saito, Toru; Yamanaka, Shusuke; Kitagawa, Yasutaka; Kawakami, Takashi; Yamada, Satoru; Isobe, Hiroshi; Okumura, Mitsutaka [Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)

    2015-01-22

    First principle calculations of effective exchange integrals (J) in the Heisenberg model for diradical species were performed by both symmetry-adapted (SA) multi-reference (MR) and broken-symmetry (BS) single reference (SR) methods. Mukherjee-type (Mk) state specific (SS) MR coupled-cluster (CC) calculations by the use of natural orbital (NO) references of ROHF, UHF, UDFT and CASSCF solutions were carried out to elucidate J values for di- and poly-radical species. Spin-unrestricted Hartree Fock (UHF) based coupled-cluster (CC) computations were also performed to these species. Comparison between UHF-NO(UNO)-MkMRCC and BS UHF-CC computational results indicated that spin-contamination of UHF-CC solutions still remains at the SD level. In order to eliminate the spin contamination, approximate spin-projection (AP) scheme was applied for UCC, and the AP procedure indeed corrected the error to yield good agreement with MkMRCC in energy. The CC double with spin-unrestricted Brueckner's orbital (UBD) was furthermore employed for these species, showing that spin-contamination involved in UHF solutions is largely suppressed, and therefore AP scheme for UBCCD removed easily the rest of spin-contamination. We also performed spin-unrestricted pure- and hybrid-density functional theory (UDFT) calculations of diradical and polyradical species. Three different computational schemes for total spin angular momentums were examined for the AP correction of the hybrid (H) UDFT. HUDFT calculations followed by AP, HUDFT(AP), yielded the S-T gaps that were qualitatively in good agreement with those of MkMRCCSD, UHF-CC(AP) and UB-CC(AP). Thus a systematic comparison among MkMRCCSD, UCC(AP) UBD(AP) and UDFT(AP) was performed concerning with the first principle calculations of J values in di- and poly-radical species. It was found that BS (AP) methods reproduce MkMRCCSD results, indicating their applicability to large exchange coupled systems.

  8. A Multibeam Dual-Band Orthogonal Linearly Polarized Antenna Array for Satellite Communication on the Move

    Directory of Open Access Journals (Sweden)

    Yi Liu

    2015-01-01

    Full Text Available The design and simulation of a 10 × 8 multibeam dual-band orthogonal linearly polarized antenna array operating at Ku-band are presented for transmit-receive applications. By using patches with different coupling methods as elements, both perpendicular polarization in 12.25–12.75 GHz band and horizontal polarization in 14.0–14.5 GHz band are realized in a shared antenna aperture. A microstrip Rotman lens is employed as the beamforming network with 7 input ports, which can generate a corresponding number of beams to cover −30°–30° with 5 dB beamwidth along one dimension. This type of multibeam orthogonal linearly polarized planar antenna is a good candidate for satellite communication (SatCom.

  9. Transcriptional profiling of cattle infected with Trypanosoma congolense highlights gene expression signatures underlying trypanotolerance and trypanosusceptibility

    Directory of Open Access Journals (Sweden)

    Naessens Jan

    2009-05-01

    Full Text Available Abstract Background African animal trypanosomiasis (AAT caused by tsetse fly-transmitted protozoa of the genus Trypanosoma is a major constraint on livestock and agricultural production in Africa and is among the top ten global cattle diseases impacting on the poor. Here we show that a functional genomics approach can be used to identify temporal changes in host peripheral blood mononuclear cell (PBMC gene expression due to disease progression. We also show that major gene expression differences exist between cattle from trypanotolerant and trypanosusceptible breeds. Using bovine long oligonucleotide microarrays and real time quantitative reverse transcription PCR (qRT-PCR validation we analysed PBMC gene expression in naïve trypanotolerant and trypanosusceptible cattle experimentally challenged with Trypanosoma congolense across a 34-day infection time course. Results Trypanotolerant N'Dama cattle displayed a rapid and distinct transcriptional response to infection, with a ten-fold higher number of genes differentially expressed at day 14 post-infection compared to trypanosusceptible Boran cattle. These analyses identified coordinated temporal gene expression changes for both breeds in response to trypanosome infection. In addition, a panel of genes were identified that showed pronounced differences in gene expression between the two breeds, which may underlie the phenomena of trypanotolerance and trypanosusceptibility. Gene ontology (GO analysis demonstrate that the products of these genes may contribute to increased mitochondrial mRNA translational efficiency, a more pronounced B cell response, an elevated activation status and a heightened response to stress in trypanotolerant cattle. Conclusion This study has revealed an extensive and diverse range of cellular processes that are altered temporally in response to trypanosome infection in African cattle. Results indicate that the trypanotolerant N'Dama cattle respond more rapidly and with a

  10. Exclusion limits on the WIMP-nucleon cross section from the Cryogenic Dark Matter Search

    International Nuclear Information System (INIS)

    Abrams, D.; Baudis, L.; Brink, P.L.; Cabrera, B.; Castle, J.P.; Chang, C.L.; Clarke, R.M.; Saab, T.; Akerib, D.S.; Bolozdynya, A.; Driscoll, D.; Kamat, S.; Perera, T.A.; Schnee, R.W.; Wang, G.; Armel-Funkhouser, M.S.; Golwala, S.R.; Hellmig, J.; Mandic, V.; Meunier, P.

    2002-01-01

    The Cryogenic Dark Matter Search (CDMS) employs low-temperature Ge and Si detectors to search for weakly interacting massive particles (WIMPs) via their elastic-scattering interactions with nuclei while discriminating against interactions of background particles. For recoil energies above 10 keV, events due to background photons are rejected with >99.9% efficiency, and surface events are rejected with >95% efficiency. The estimate of the background due to neutrons is based primarily on the observation of multiple-scatter events that should all be neutrons. Data selection is determined primarily by examining calibration data and vetoed events. Resulting efficiencies should be accurate to ∼10%. Results of CDMS data from 1998 and 1999 with a relaxed fiducial-volume cut (resulting in 15.8 kg days exposure on Ge) are consistent with an earlier analysis with a more restrictive fiducial-volume cut. Twenty-three WIMP candidate events are observed, but these events are consistent with a background from neutrons in all ways tested. Resulting limits on the spin-independent WIMP-nucleon elastic-scattering cross section exclude unexplored parameter space for WIMPs with masses between 10-70 GeV/c 2 . These limits border, but do not exclude, parameter space allowed by supersymmetry models and accelerator constraints. Results are compatible with some regions reported as allowed at 3σ by the annual-modulation measurement of the DAMA Collaboration. However, under the assumptions of standard WIMP interactions and a standard halo, the results are incompatible with the DAMA most likely value at >99.9% confidence level (C.L.), and are incompatible with the model-independent annual-modulation signal of DAMA at 99.99% C.L. in the asymptotic limit

  11. Analysis of Silver Ink Bow-Tie RFID Tag Antennas Printed on Paper Substrates

    Directory of Open Access Journals (Sweden)

    Sari Merilampi

    2007-01-01

    Full Text Available In this study, polymeric silver inks, paper substrates, and screen printing were used to produce prototype Bow-Tie tags. Because of increasing interest in applying passive UHF-RFID systems in paper industry, the Bow-Tie antenna used in this study was designed to work through paper. The maximum reliable read ranges of the tags were measured thorough stacked paper and also in air. The analysis and functioning of the antenna design are also discussed. All inks and paper substrates were suitable as antenna material and the prototype tag antennas had good reading performance. The maximum reliable read ranges were quite the same as for copper and aluminum tags studied elsewhere. This means that printed UHF tags are competitive solutions for the identification of simple mass products.

  12. Software Implementation of Secure Firmware Update in IoT Concept

    Directory of Open Access Journals (Sweden)

    Lukas Kvarda

    2017-01-01

    Full Text Available This paper focuses on a survey of secure firmware update in the Internet of Things, design and description of safe and secure bootloader implementation on RFID UHF reader, encryption with AES-CCM and versioning with use of external backup flash memory device. In the case of problems with HW compatibility or other unexpected errors with new FW version, it is possible to downgrade to previous FW image, including the factory image. Authentication is provided by the UHF RFID service tag used to extract unique initialization vector of the encryption algorithm for each update session. The results show slower update speed with this new upgrade method of approximately 27% compared to older one, using the only AES-CBC algorithm.

  13. Compact high efficiency, light weight 200-800 MHz high power RF source

    International Nuclear Information System (INIS)

    Shrader, M.B.; Preist, D.H.

    1985-01-01

    There has long been a need for a new more efficient less bulky high power RF power source to drive accelerators in the 200 to 800 MHz region. Results on a recent 5-year EIMAC sponsored R and D program which have lead to the introduction of the Klystrode for UHF television and troposcatter applications indicate that at power levels of 1MW or more efficiencies in excess of 75% can be obtained at 450 MHz. Efficiencies of this order coupled with potential size and weight parameters which are a fraction of those of existing high power UHF generators open up new applications which heretofore would have been impractical if not impossible. Measurements at 470 MHz on existing Klystrodes are given. Projected operating conditions for a 1MW 450 MHz Klystrode having an overall length of 60 inches and a total tube, circuit, and magnet weight of 250 pounds is presented

  14. Estimating the Permittivity of Rogers 4003C Substrate at Low Frequencies for Application in a Superdirective First-Order Probe for SNF Measurements

    DEFF Research Database (Denmark)

    Kim, Oleksiy S.

    2016-01-01

    The bulk permittivity of Rogers 4003C substrate is estimated in the lower UHF frequency band by comparing the simulated and measured return loss for a bandpass filter based on a coplanar waveguide and a capacitively loaded loop. The obtained value, which deviates from that specified by Rogers at ...... GHz, is subsequently utilized for accurate design of a new light-weight superdirective first-order probe for spherical near-field (SNF) antenna measurements at low frequencies.......The bulk permittivity of Rogers 4003C substrate is estimated in the lower UHF frequency band by comparing the simulated and measured return loss for a bandpass filter based on a coplanar waveguide and a capacitively loaded loop. The obtained value, which deviates from that specified by Rogers at 10...

  15. The investigation of the ionosphere using Eiscat radar

    International Nuclear Information System (INIS)

    Gerwin, R.

    1981-01-01

    Eiscat (European Incoherent Scatter Association) is a research organisation based in Kiruna (Sweden) with the support of several North European nations and has transmitters working in Tromsoe (Norway) and receivers situated in Tromsoe, Kiruna and Sodankylae (Finland), all near the Arctic Circle. Wavelengths used are 22 cm (UHF) and 134 cm (VHF). Scatter results have been obtained from free electrons in the ionosphere and in the magnetosphere. In the UHF (250 kw) system there is a four segment concave reflector occupying the area of a football field. The VHF (650 kW) system uses a four segment parabolic reflector. Both systems have been employed to investigate plasma phenomena and especially the ''Northern Lights''. (G.C.)

  16. Methodological aspects of hygienic standardization of complex radiation and non-radiation effects on human organizm

    International Nuclear Information System (INIS)

    Liberman, A.N.; Sanovskaya, M.S.; Bronshtejn, I.Eh.; Orobej, V.V.

    1978-01-01

    Considered are the necessary requirements for the methodics of substantiating the hygienic standards for a combined effect of radiation and nonradiation factors on workers engaged in electronic, radio engineering branches of industry and a number of nuclear-physical units. These approaches were used in planning and conducting of investigations on hygienic evaluation of a combined effect of ionizing radiation, electromagnetic UHF radiation, noise and other factors. Along with experimental investigations on small laboratory animals, clinico-physiological examinations of people affected by a combined or predominantely separate effect of the above-mentioned factors have been carried out for many years. The material obtaed has been subjected to mathematical treatment with the use of dispersion analysis. The results testify to the intensification of the effect under conditions of a combined action of X-ray and UHF radiations and noise

  17. Telecommunications Relay Support of the Mars Phoenix Lander Mission

    Science.gov (United States)

    Edwards, Charles D., Jr.; Erickson, James K.; Gladden, Roy E.; Guinn, Joseph R.; Ilott, Peter A.; Jai, Benhan; Johnston, Martin D.; Kornfeld, Richard P.; Martin-Mur, Tomas J.; McSmith, Gaylon W.; hide

    2010-01-01

    The Phoenix Lander, first of NASA's Mars Scout missions, arrived at the Red Planet on May 25, 2008. From the moment the lander separated from its interplanetary cruise stage shortly before entry, the spacecraft could no longer communicate directly with Earth, and was instead entirely dependent on UHF relay communications via an international network of orbiting Mars spacecraft, including NASA's 2001 Mars Odyssey (ODY) and Mars Reconnaissance Orbiter (MRO) spacecraft, as well as ESA's Mars Express (MEX) spacecraft. All three orbiters captured critical event telemetry and/or tracking data during Phoenix Entry, Descent and Landing. During the Phoenix surface mission, ODY and MRO provided command and telemetry services, far surpassing the original data return requirements. The availability of MEX as a backup relay asset enhanced the robustness of the surface relay plan. In addition to telecommunications services, Doppler tracking observables acquired on the UHF link yielded an accurate position for the Phoenix landing site.

  18. An ultra-high frequency boundary layer Doppler/interferometric profiler

    International Nuclear Information System (INIS)

    Van Baelen, J.S.

    1994-01-01

    The planetary boundary layer (PBL) is that portion of the earth's atmosphere that is directly influenced by the earth's surface. The PBL can be vigorously turbulent and range in depth from a few hundred meters to a few kilometers. Solar energy is primarily absorbed at the earth's surface and transmitted to the free atmosphere through boundary-layer processes. An accurate portrayal of these transfers within the PBL is crucial to understand and predict many atmospheric processes from pollutant dispersion to numerical weather prediction and numerical simulations of climate change. This paper describes and discusses wind profiling techniques, focusing on the newly developed radio acoustic sounding system (RASS), and reviews past efforts to measure flux within the PBL. A new UHF wind profiling radar, the UHF Doppler/Interferometric Boundary Layer Radar, for accurately measuring both mean and flux quantities, as well as wind divergence and acoustic wave propagation, is outlined

  19. Development of novel wireless sensor for food quality detection

    International Nuclear Information System (INIS)

    Son Nguyen, Dat; Le, Nguyen Ngan; Lam, Tan Phat; Fribourg-Blanc, Eric; Dang, Mau Chien; Tedjini, Smail

    2015-01-01

    In this paper we present a wireless sensor for the monitoring of food quality. We integrate sensing capability into ultrahigh frequency (UHF) radio-frequency identification (RFID) tags through the relationship between the physical read-range and permittivity of the object we label with the RFID tags. Using the known variations of food permittivity as a function of time, we can detect the contamination time at which a food product becomes unacceptable for consumption based on the measurement of read-range with the as-designed sensing tags. This low-cost UHF RFID passive sensor was designed and experimentally tested on beef, pork, and cheese with the same storage conditions as in supermarkets. The agreement between the experimental and simulation results show the potential of this technique for practical application in food-quality tracking. (paper)

  20. Effective arrangement of separated transmit-only/receive-only RF coil for improvement of B1 homogeneity at 7 Tesla

    Science.gov (United States)

    Im, Geun Ho; Seo, Jeong-Hoon; Kim, Kyoung-Nam; Heo, Phil; Chung, Julius Juhyun; Jang, Moon-Sun; Lee, Jung Hee; Kim, Jae-Hun; Kim, Sun I.

    2014-09-01

    This article presents an effective arrangement with shifted transmit (Tx)-only and receive (Rx)-only (TORO) radiofrequency (RF) coils in a single-channel surface coil for improving the magnetic flux ( B 1) homogeneity in an ultra-high field (UHF) magnetic resonance imaging (MRI) scanner. The proposed new methodology for the coil arrangement using the shifted TORO RF coils was demonstrated for coils with 50-mm, 100-mm, and 150-mm-square surfaces and the results were compared to those for general Tx/Rx surface coils with the same dimensions. The computational analysis indicated that a homogeneous B1 field was achieved when the Rx-only coil was shifted in the two-dimensional xy-plane away from the Tx-only coils. Because the proposed coil configuration provides a unique opportunity for increasing the B 1 homogeneity, this feature is likely to increase the feasibility via new coil arrangements of UHF surface design and fabrication.

  1. Novel “Enhanced-Cognition” RFID Architectures on Organic/Paper Low-Cost Substrates Utilizing Inkjet Technologies

    Directory of Open Access Journals (Sweden)

    Li Yang

    2007-01-01

    Full Text Available The purpose of this paper is to present an overview of novel design and integration approaches for improved performance “enhanced-cognition” UHF passive and active radio frequency identification (RFID tags. Antenna design rules are explained for a variety of applications. A strategy that is currently under development for embedding power sources and integration of sensors and integrated circuits (ICs on low-cost organic substrates, such as liquid crystal polymer (LCP and paper, enabling the use of inkjet-printing capability for the UHF frequency band, is discussed in the paper. The proposed technologies could potentially revolutionize RFID tags allowing for integrated sensing capabilities for various applications such as security, military, logistics, automotion, and pharmaceutics.

  2. Combined radar observations of equatorial electrojet irregularities at Jicamarca

    Directory of Open Access Journals (Sweden)

    D. L. Hysell

    2007-03-01

    Full Text Available Daytime equatorial electrojet plasma irregularities were investigated using five distinct radar diagnostics at Jicamarca including range-time-intensity (RTI mapping, Faraday rotation, radar imaging, oblique scattering, and multiple-frequency scattering using the new AMISR prototype UHF radar. Data suggest the existence of plasma density striations separated by 3–5 km and propagating slowly downward. The striations may be caused by neutral atmospheric turbulence, and a possible scenario for their formation is discussed. The Doppler shifts of type 1 echoes observed at VHF and UHF frequencies are compared and interpreted in light of a model of Farley Buneman waves based on kinetic ions and fluid electrons with thermal effects included. Finally, the up-down and east-west asymmetries evident in the radar observations are described and quantified.

  3. Network design consideration of a satellite-based mobile communications system

    Science.gov (United States)

    Yan, T.-Y.

    1986-01-01

    Technical considerations for the Mobile Satellite Experiment (MSAT-X), the ground segment testbed for the low-cost spectral efficient satellite-based mobile communications technologies being developed for the 1990's, are discussed. The Network Management Center contains a flexible resource sharing algorithm, the Demand Assigned Multiple Access scheme, which partitions the satellite transponder bandwidth among voice, data, and request channels. Satellite use of multiple UHF beams permits frequency reuse. The backhaul communications and the Telemetry, Tracking and Control traffic are provided through a single full-coverage SHF beam. Mobile Terminals communicate with the satellite using UHF. All communications including SHF-SHF between Base Stations and/or Gateways, are routed through the satellite. Because MSAT-X is an experimental network, higher level network protocols (which are service-specific) will be developed only to test the operation of the lowest three levels, the physical, data link, and network layers.

  4. First 10 kg of naked germanium detectors installed in liquid nitrogen in GENIUS Test-Facility in GRAN-SASSO

    Energy Technology Data Exchange (ETDEWEB)

    Klapdor-Kleingrothaus, H.V. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany)

    2004-07-01

    The GENIUS Test Facility has come into operation in Gran Sasso on May 5, 2003 with its first ten kg of naked Ge detectors in liquid nitrogen. This is the first time that this novel technique for extreme background reduction in search for rare decays is applied under the background conditions of an underground laboratory. GENIUS-TF has the potential to check the DAMA evidence for cold dark matter by modulation, and possibly, to improve the accuracy of the recently observed first signal for neutrinoless double beta decay. (orig.)

  5. The Dark Side of Strongly Coupled Theories

    DEFF Research Database (Denmark)

    Kouvaris, Christoforos

    2008-01-01

    We investigate the constraints of dark matter search experiments on the different candidates emerging from the minimal quasi-conformal strong coupling theory with fermions in the adjoint representation. For one candidate, the current limits of CDMS exclude a tiny window of masses around 120 GeV. We...... also investigate under what circumstances the newly proposed candidate composed of a -2 negatively charged particle and a $^4He^{+2}$ can explain the discrepancy between the results of the CDMS and DAMA experiments. We found that this type of dark matter should give negative results in CDMS, while...

  6. Supersymmetry and cosmology

    International Nuclear Information System (INIS)

    Feng, Jonathan L.

    2005-01-01

    Cosmology now provides unambiguous, quantitative evidence for new particle physics. I discuss the implications of cosmology for supersymmetry and vice versa. Topics include: motivations for supersymmetry; supersymmetry breaking; dark energy; freeze out and WIMPs; neutralino dark matter; cosmologically preferred regions of minimal supergravity; direct and indirect detection of neutralinos; the DAMA and HEAT signals; inflation and reheating; gravitino dark matter; Big Bang nucleosynthesis; and the cosmic microwave background. I conclude with speculations about the prospects for a microscopic description of the dark universe, stressing the necessity of diverse experiments on both sides of the particle physics/cosmology interface

  7. Course 6. dark matter: direct detection

    International Nuclear Information System (INIS)

    Chardin, G.

    2000-01-01

    Determining the precise nature of dark matter is one of the main open questions of contemporary physics. The search for non-baryonic dark matter is strongly motivated by present data and 3 particle candidates: wimps (weakly interactive massive particles), axions and massive neutrinos are actively searched by several experiments (GENIUS, HDMS, CDMS, EDELWEISS, LLNL, CARRACK, SOLAX, DAMA,...). In this course the author reviews and summarizes the experimental situation and analyzes the main detection strategies developed to identify the dark matter candidates. (A.C.)

  8. First 10 kg of naked germanium detectors installed in liquid nitrogen in GENIUS Test-Facility in GRAN-SASSO

    International Nuclear Information System (INIS)

    Klapdor-Kleingrothaus, H.V.

    2004-01-01

    The GENIUS Test Facility has come into operation in Gran Sasso on May 5, 2003 with its first ten kg of naked Ge detectors in liquid nitrogen. This is the first time that this novel technique for extreme background reduction in search for rare decays is applied under the background conditions of an underground laboratory. GENIUS-TF has the potential to check the DAMA evidence for cold dark matter by modulation, and possibly, to improve the accuracy of the recently observed first signal for neutrinoless double beta decay. (orig.)

  9. GENIUS-TF: a test facility for the GENIUS project

    International Nuclear Information System (INIS)

    Klapdor-Kleingrothaus, H.V.; Baudis, L.; Dietz, A.; Heusser, G.; Krivosheina, I.; Majorovits, B.; Strecker, H.

    2002-01-01

    GENIUS is a proposal for a large scale detector of rare events. As a first step of the experiment, a small test version, the Genius Test-Facility will be built at the Laboratori Nazionali del Gran Sasso. With about 40 kg of natural Ge detectors operated in liquid nitrogen, GENIUS-TF could exclude (or directly confirm) the DAMA annual modulation seasonal modulation signature within about 2 yr of measurement using both, signal and signature of the claimed WIMP Dark Matter. The construction of the experiment has already been started, and four 2.5 kg germanium detectors with an extreme low threshold of 500 eV have been produced

  10. Resolving astrophysical uncertainties in dark matter direct detection

    DEFF Research Database (Denmark)

    Frandsen, Mads Toudal; Kahlhoefer, Felix; McCabe, Christopher

    2012-01-01

    We study the impact of the assumed velocity distribution of galactic dark matter particles on the interpretation of results from nuclear recoil detectors. By converting experimental data to variables that make the astrophysical unknowns explicit, different experiments can be compared without...... implicit assumptions concerning the dark matter halo. We extend this framework to include the annual modulation signal, as well as multiple target elements. Recent results from DAMA, CoGeNT and CRESST-II can be brought into agreement if the velocity distribution is very anisotropic and thus allows a large...

  11. Consumer value creation in strategic marketing planning process by the example of kaunas fitness and wellness centers

    OpenAIRE

    Lukašenkinaitė, Monika

    2014-01-01

    Lietuvoje sunkmečio laikotarpiu kiekviena organizacija privalo įsigilinti į savo vartotojo poreikius bei efektyviai juos tenkinti, todėl strateginį marketingo planavimą nagrinėsime vertės vartotojui kurimo aspektu. Sporto paslaugas teikiančių įmonių sektoriuje per pastaruosius kelerius metus įvyko daug pokyčių, tarp jų: technologiniai pokyčiai, dalyvavimo sporto veikloje augimas ir kt. Kiekviena sporto sporto paslaugas teikianti įmonė, norėdama efektyviai vykdyti savo veiklą, privalo atsižvel...

  12. Type Classes for Lightweight Substructural Types

    Directory of Open Access Journals (Sweden)

    Edward Gan

    2015-02-01

    Full Text Available Linear and substructural types are powerful tools, but adding them to standard functional programming languages often means introducing extra annotations and typing machinery. We propose a lightweight substructural type system design that recasts the structural rules of weakening and contraction as type classes; we demonstrate this design in a prototype language, Clamp. Clamp supports polymorphic substructural types as well as an expressive system of mutable references. At the same time, it adds little additional overhead to a standard Damas-Hindley-Milner type system enriched with type classes. We have established type safety for the core model and implemented a type checker with type inference in Haskell.

  13. Historia del Hogar Casa Cuna de la ciudad de Mendoza: La institución que permanece

    OpenAIRE

    Farias Carracedo, Ana Carolina

    2017-01-01

    Este trabajo presenta la historia del Hogar Casa Cuna en la ciudad de Mendoza, Argentina,desde sus orígenes, a principios del siglo XX, hasta la actualidad enmarcando dicha historia enel contexto legislativo nacional y provincial.En sus orígenes, la Casa Cuna fue fundada por las Damas de la Caridad. En 1950 el Estado, pormedio de la Dirección Provincial del Menor, se hizo cargo de dicha institución aunque delegó elcuidado de los niños a las Hermanas de Nuestra Señora del Rosario que desempeña...

  14. Innovación en el sector cementero de Colombia: estudio de caso Cementos Tequendama

    OpenAIRE

    Jennifer Paola Peña Romero; Moisés Ari Zilber

    2015-01-01

    El objetivo de este trabajo es interpretar el significado que el personal de la empresa de Cementos Tequen- dama le otorga a la innovación tomando como guía de investigación el Modelo de Innovación del autor Allan Afuah, mediante el estudio de caso y la entrevista en profundidad a informantes clave representados por personal seleccionado en la empresa. Los resultados demuestran que los principales factores que la empresa tiene en cuenta al desarrollar sus procesos de innovación son el análisi...

  15. Characterization of purple and green photosynthetic bacteria isolated from the lagoon of Agatti Atoll (Lakshadweep Sea)

    Digital Repository Service at National Institute of Oceanography (India)

    LokaBharathi, P.A.; Chandramohan, D.

    , H. medicinalis. Lastly, the denticles are distinctly sharper and more acute-tipped than those of P. granulosa. The presence of such a denticular curvature and acute tip obviously adds to the sawing efficiency of the jaws of the land-leeches during... around the denticles. In short, a denticle not only pours saliva but is bathed by it also during microincision. A similar intra-denticular salivary discharge has been reported by Damas2 in H. medicinalis. The author is grateful to Dr V. K. Bajpai for help...

  16. Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with CsI(Tl) Crystal Detectors

    International Nuclear Information System (INIS)

    Lee, H. S.; Bhang, H. C.; Choi, J. H.; Kim, D. W.; Kim, S. C.; Kim, S. K.; Kwak, J. W.; Lee, J.; Lee, J. H.; Lee, M. J.; Lee, S. J.; Myung, S. S.; Ryu, S.; Dao, H.; Li, J.; Li, X.; Li, Y. J.; Yue, Q.; Zhu, J. J.; Hahn, I. S.

    2007-01-01

    The Korea Invisible Mass Search (KIMS) experiment presents new limits on the weakly interacting massive particle (WIMP)-nucleon cross section using data from an exposure of 3409 kg·d taken with low-background CsI(Tl) crystals at the Yangyang Underground Laboratory. The most stringent limit on the spin-dependent interaction for a pure proton case is obtained. The DAMA signal region for both spin-independent and spin-dependent interactions for the WIMP masses greater than 20 GeV/c 2 is excluded by the single experiment with crystal scintillators

  17. Lucrezia d’Alagno o la celebración literaria y pública de la consorte de facto de Alfonso el Magnánimo

    OpenAIRE

    Rodríguez Mesa, Francisco José

    2016-01-01

    Alfonso el Magnánimo, primer monarca napolitano de la Casa de Aragón, tuvo una relación en sus últimos años con la dama napolitana Lucrezia d’Alagno. Su entrada en la escena pública -y política- de Nápoles la situará habitualmente en celebraciones de la ciudad y la corte. Con testimonios literarios e históricos proponemos un análisis de su papel en los años finales del rey. The first Neapolitan monarch of the House of Aragon, Alfonso the Magnanimous, had an affair with the Neapolitan lady ...

  18. Sra. Clemencia Restrepo de Vergara

    Directory of Open Access Journals (Sweden)

    Efraím Otero Ruiz

    2006-06-01

    Fue una de tantas damas, la mayoría de las cuales aún nos acompañan, que han sabido darle a esta centenaria Academia un aire como de “gran familia” en la que nos sentimos acogidos, aunque ya no enciendan con la debida frecuencia una de sus cálidas y enormes chimeneas. Esa calidez es la que permanece en el espíritu de todos los que conocimos a Clemencia. Por eso van para Roberto, sus admirables hijos y todos sus familiares, nuestros votos de solidaridad y sincera condolencia...

  19. Dark matter search experiment with CaF2(Eu) scintillator at Kamioka Observatory

    International Nuclear Information System (INIS)

    Shimizu, Y.; Minowa, M.; Suganuma, W.; Inoue, Y.

    2006-01-01

    We report recent results of a WIMP dark matter search experiment using 310 g of CaF 2 (Eu) scintillator at Kamioka Observatory. We chose a highly radio-pure crystal, PMTs and radiation shields, so that the background rate decreased considerably. We derived limits on the spin dependent WIMP-proton and WIMP-neutron coupling coefficients, a p and a n . The limits excluded a part of the parameter space allowed by the annual modulation observation of the DAMA NaI experiment

  20. Algunas consideraciones sobre la sicopatía y el suicidio de Silva : obsesion de la locura y del suicidio; un caso complicado de sicopatologia

    Directory of Open Access Journals (Sweden)

    Benigno Acosta Polo

    1965-08-01

    Full Text Available Sin haber dejado sospechar lo mínimo respecto de su terrible decisión; sin haber escrito una sola línea sobre el particular ni haberse dejado traicionar por los nervios durante el día y la noche que antecedieron a la tragedia; sin haber dejado traslucir la más leve impaciencia ante los caballeros y las damas que hasta la media noche tertuliaron en su casa, José Asunción Silva preparó, serenamente, su viaje definitivo por el angosto túnel del cañón de una pistola.