• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 79
  • 52
  • 24
  • 15
  • 15
  • 8
  • 5
  • 4
  • 3
  • 3
  • 3
  • 3
  • 3
  • 2
  • 2
  • Tagged with
  • 243
  • 50
  • 30
  • 30
  • 28
  • 22
  • 22
  • 20
  • 20
  • 18
  • 18
  • 15
  • 14
  • 14
  • 14
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
41

Svensk Underrättelsetjänst inom COIN

Öfverholm, Ragnar January 2013 (has links)
Uppsatsens syfte är att titta på hur det svenska underrättelsereglementet från 2010 förhåller sig till kontemporära COIN teorier i en internationell miljö. Sverige saknar en egen COIN doktrin och nyttjar idag den amerikanska doktrinen FM 3-24 samtidigt som ett arbete sker för att anpassa reglementen mot NATO doktriner för ökad interoperabilitet. Undersölningen jämför därför FM UndR med underrättelsedoktriner samt COIN doktriner från USA och NATO. Uppsatsen utgår från David Kilcullens COIN teorier för underrättelsetjänst vilka operationaliserats i ett analysverktyg som anlagts på empirin. Resultatet av undersökningen visar att det svenska underrättelsereglementet har stora brister kopplat till det perspektiv som förespråkas inom COIN-sfären. Trots detta finns stora likheter till både amerikanska så väl som NATO doktrinerna 2.0 vilka rör underrättelsetjänst. Med detta som bakgrund kan slutsatsen dras att FM UndR utgör en tillräcklig grund för att svensk underrättelse personal ska kunna tillgodogöra sig av både amerikanska och NATO COIN doktrinerna.
42

O circuito sonoro : radiodifusão FM e produção fonografica em Campinas-SP / The sound circuit : radio FM and music production in Campinas-SP

Alves, Cristiano Nunes, 1981- 12 August 2018 (has links)
Orientador: Adriana Maria Bernardes da Silva / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias / Made available in DSpace on 2018-08-12T06:40:25Z (GMT). No. of bitstreams: 1 Alves_CristianoNunes_M.pdf: 4787468 bytes, checksum: 0a45b75d1274f8bc2035a479fc63a8a9 (MD5) Previous issue date: 2008 / Resumo: Esta pesquisa busca analisar as dinâmicas sócio-territoriais na cidade atual. Para tanto, pretendemos contribuir para o entendimento da conformação e da espessura dos circuitos de rádio FM e produção fonográfica em Campinas. O circuito FM em Campinas se insere no campo da indústria cultural desde a década de 1970, tendo se expandido no contexto de urbanização e metropolização crescentes no Brasil. Hoje este circuito integra um sistema maior, atrelado à estratégias verticais de uso do território. Observamos que em contrapartida ao circuito FM, certo componente musical residual nos lugares envolve, entre outros, a produção alternativa e as rádios livres. Envolvidos por uma divisão técnica e territorial do trabalho dinamizada por círculos ascendentes de informação, esses circuitos mais territorializados sobrevivem à cisão e fragmentação urbanas. Trata-se, pois, de um estudo de Campinas enquanto um lugar que abriga densidades técnica, informacional e comunicacional. Problematizamos as condições geográficas contemporâneas de vida nesta cidade, indagando sobre o componente comunicacional no uso do território. / Abstract: This research examines the dynamic socio-territorial in the city today. For this reason, we are looking forward to contribute to the understanding of the formation and the thickness of the circuits of radio FM and the music production in Campinas. The circuit FM in Campinas falls in the field of cultural industry since de decade of 1970, and has been expanding in the context of urbanization and metropolis growing in Brazil. Today this circuit incorporates a bigger system, coupled with the strategies of vertical use of the territory. We noticed that in contrast to the circuit FM, some residual musical component in places involves, among others, the alternative production and free radios. These circuits involved by a technically and territorial division of labor spurred by circuits upside of information, survive to the urban division and fragmentation. It is, therefore, a study of Campinas as a place that houses technical, informational and communicational densities. We analyzed geographical conditions of contemporary life in this city, inquiring about the communication component in the use of the territory. / Mestrado / Análise Ambiental e Dinâmica Territorial / Mestre em Geografia
43

Facility management v ČR - trh a podpora nástroji IS/ICT / Facility Management in Czech Republic - market overview and IT/ICT support

Apfelthaler, Jan January 2008 (has links)
Tato diplomová práce má za úkol poskytnout čtenáři ucelený přehled o Facility Managementu, jeho historii, současném stavu v České Republice a IT/ICT nástrojích jež se pro podporu Facility Managementu užívají. Trh Facility Managementu v České republice je analyzován ze tří úhlů pohledu. První částí je odhad regionálního objemu služeb Facility Managementu za pomocí vícekriteriálního hodnocení regionů dle makroekonomických a konkurenčních údajů získaných vesměs z Českého statistického úřadu. Metodika druhé části, jež se zabývá objemem služeb dle odvětvové struktury trhu, je obdobná. Třetí částí je analýza a definice služeb Facility Managementu a jejich přiřazení k jednotlivým poskytovatelům v České republice. Poslední částí této práce je přehled nástrojů IT/ICT podpory pokrývající Facility Management, jejich vzájemné porovnání a nalezení přidané hodnoty těchto systémů vedoucí k implementaci nad rámec standardních ERP řešení.
44

Dekódování RDS zpráv obvodem FPGA / The RDS decoder on the FPGA

Vedra, Lukáš January 2014 (has links)
This thesis deals with demodulation, decoding RDS messages and an FM receiver in FPGA. It is the processing of data after A/D conversion of radio stereo signal. This work contains detailed theoretical knowledge of the RDS system, of the individual types of messages, their demodulation and subsequent decoding of individual services. There is theoretically analyzed in FPGA platform and implementation of RDS System and FM receiver.
45

Normál vlnové délky pro optické komunikace v pásmu C / Wavelength Standard for Optical Communication in C Band

Růžička, Bohdan January 2008 (has links)
The thesis presents design, development and realization of laser system with stabilized optical frequency which could become the basis of an etalon of wavelength for the telecommunication band of the near-infrared spectral region. Semiconductor DFB laser diode is used as a tunable source of radiation with narrow linewidth. Its optimum operation is ensured by especially designed current and temperature controller. The laser is prestabilized using FM spectroscopy technique to the passive Fabry-Perot cavity. This fast feed-back loop is able to improve spectral characteristics of the laser. The center frequency of the F.-P. cavity - the laser optical frequency is locked by a slow second feed-back loop to the absorption spectral line of acetylene 13C2H2 gas. The slow control loop is based on the third derivative spectroscopy technique. Relative stability at the level of 10E-12 was achieved.
46

The Effects of Emotion on Acoustic Characteristics of Vocal Vibrato in Trained Singers

Holmes, Sharee Oakes 14 June 2013 (has links) (PDF)
The purpose of this study was to investigate the effects of emotion on several key acoustic features of vibrato including vibrato rate, extent, and steadiness (measured by FM rate COV and FM extent COV). We hypothesized that intensity of emotion would have a significant effect on vibrato rate, extent, and periodicity, although the direction of these changes was undetermined. There were 10 participants, including eight females and two males, who were graduate student singers with high competency ratings. Each participant completed a series of tasks including sustained vowels at several pitch and loudness levels, an assigned song that was determined to have neutral emotion, and a personal selection that was selected because it included sections of intense emotion. Vowel tokens were averaged for each task, and measurements of mean f0, mean dB, FM rate, FM extent, FM rate COV and FM extent COV were calculated by task for each participant. Contrast analyses were performed comparing each task against the personal selection (high emotion) task. The results suggest that FM rate and FM rate COV may have been influenced by level of emotion, and FM extent, FM rate COV and FM extent COV were likely influenced by the performance nature of the task.
47

ENHANCING THE PCM/FM LINK - WITHOUT THE MATH

Fewer, Colm, Wilmot, Sinbad 10 1900 (has links)
ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / Since the 1970s PCM/FM has been the dominant modulation scheme used for RF telemetry. However more stringent spectrum availability as well as increasing data rates means that more advanced transmission methods are required to keep pace with industry demands. ARTM Tier-I and Tier-II are examples of how the PCM/FM link can be enhanced. However these techniques require a significant increase in the complexity of the receiver/detector for optimal recovery. This paper focuses on a quantitative approach to improving the rate and quality of data using existing PCM/FM links. In particular ACRA CONTROL and BAE SYSTEMS set themselves the goal of revisiting the pre-modulation filter, diversity combiner and bit-sync. By implementing programmable adaptive hardware, it was possible to explore the various tradeoffs offered by modifying pulse shapes and spectral occupancy, inclusion of forward error correction and smart source selection. This papers looks at the improvements achieved at each phase of the evaluation.
48

SYNCHRONOUS COMMAND GENERATOR IN A SINGLE STANDALONE CHASSIS FOR SPINNING SATELLITES

Boulinguez, Marc, Carlier, Pierre-Marie 10 1900 (has links)
International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California / Designed for unattended 24 hours-a-day operation in automatic system environments, the 3801 TT&C Digital Processor Unit is the key communication unit for ground stations operating spacecraft, from integration to positioning phase and in-orbit operation. Its architecture and technology concept combine high performance, compactness and modularity. The 3801 TT&C Digital Processor Unit supports multiple formats in a single stand-alone chassis, and incorporates extensive interfacing and functional provisions to maximize effectiveness, reliability and dependability. It supports a number of configurations for satellite control applications and performs :* • Telemetry IF demodulation and transmission of data to a high-level communication interface, with time tagging and display of decommutated parameters, • Command generation, with FSK or PSK and FM or PM modulation at 70 MHz, • Ranging measurements and calibration using ESA, INTELSAT and major standards (tones and codes). In addition, the 3801 TT&C Digital Processor supports a Synchronous Command Generator for spinning satellite in a single stand-alone chassis and includes : • FM signal discrimination, for satellite spin reference information coming from the Telemetry Reception channel, • Synchronization Controller for providing the reference « top » for the transmission of the synchronous tones, • Tones Generation of frequency tones towards the PM/FM Modulator.
49

IRIG FQPSK-B STANDARDIZATION PROGRESS REPORT

Law, Eugene L. 10 1900 (has links)
International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / This paper will provide an overview of the process used to develop the bandwidth efficient modulation sections of the Inter-Range Instrumentation Group (IRIG) standard. The modulation method selected was Feher’s patented quadrature phase shift keying (FQPSK-B). The important characteristics of a bandwidth efficient modulation method for aeronautical telemetry will be presented first followed by a summary of the results of the research, laboratory test, and flight test efforts. Future plans will then be summarized followed by the FQPSK-B sections of the current IRIG Telemetry Standard (the standard is available online at: http://tecnet0.jcte.jcs.mil/RCC/oldoc.htm).
50

A Technical Study on Microwave FM Locked in Phase of Telemetry Transmitters

Banghua, Zhou, Shiwei, Xiao 10 1900 (has links)
International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This paper describes techniques on the microwave FM locked in phase of transmitters in the reentry telemetry system. A few scheme configurations on the microwave FM locked in phase, its circuit characteristics and applications are analyzed. Research results show that the two-point injection microwave FM locked in phase is suitable for the telemetry system, which code rate is higher, band of wide, and modulation response very well.

Page generated in 0.0684 seconds