5,673 research outputs found

    Spectrum Allocation, Spectrum Commons and Public Goods: the Role of the Market

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    The reallocation of radio spectrum to valuable new and emerging technologies and services is essential to achieving the next wave of productivity and consumer benefits driven by ICT. Currently spectrum is not allocated to the most valuable uses, particularly the large amount of spectrum held for government use, and command and control management cannot respond fully or quickly in reallocating spectrum. To achieve a more economically efficient allocation and the greatest overall benefit market mechanisms including trading and spectrum pricing must be introduced. Complementary reforms in areas other than spectrum management will be required, and the appropriate boundary between market and non-market allocation mechanisms need to be established. Setting clear principles regarding the market/non-market boundary will help in resisting the inevitable rent seeking by incumbents and potential entrants during the transition to market mechanisms. Countries that do not face up to these challenges and move quickly will see their citizens disadvantaged as spectrum becomes a key economic resource.spectrum policy, auctions, trading, spectrum pricing, digital switchover, real options, public sector use, licence exempt use, infrastructure, Competition Policy

    The Role of Satellite Systems in Future Aeronautical Communications

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    Materials scienc

    Spectrum Utilisation and Management in Cognitive Radio Networks

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    Guidelines for spaceborne microwave remote sensors

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    A handbook was developed to provide information and support to the spaceborne remote sensing and frequency management communities: to guide sensor developers in the choice of frequencies; to advise regulators on sensor technology needs and sharing potential; to present sharing analysis models and, through example, methods for determining sensor sharing feasibility; to introduce developers to the regulatory process; to create awareness of proper assignment procedures; to present sensor allocations; and to provide guidelines on the use and limitations of allocated bands. Controlling physical factors and user requirements and the regulatory environment are discussed. Sensor frequency allocation achievable performance and usefulness are reviewed. Procedures for national and international registration, the use of non-allocated bands and steps for obtaining new frequency allocations, and procedures for reporting interference are also discussed

    Future directions in aeropropulsion technology

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    Future directions in aeropropulsion technology that have been identified in a series of studies recently sponsored by the U.S. Government are discussed. Advanced vehicle concepts that could become possible by the turn of the century are presented along with some of their projected capabilities. Key building-block propulsion technologies that will contribute to making these vehicle concepts a reality are discussed along with projections of their status by the year 2000. Some pertinent highlights of the NASA aeropropulsion program are included in the discussion

    A Review of Aeronautical Fatigue Investigations in Finland May 2021 - April 2023

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    This document was prepared for the delivery to the 38th Conference of the International Committee on Aeronautical Fatigue and Structural Integrity (ICAF) scheduled to be held in Delft, The Netherlands, 26-29 June 2023.A review is given of the aircraft structural fatigue research and associated activities which form part of the programs within the Air Force Command Finland (AFCOMFIN), the Finnish Defence Force Logistics Command, Joint Systems Centre (FDFLOGCOM JSC), Air Systems Division; Army Command Finland (ARCOMFIN); Aalto University; Arecap Ltd; Elomatic Ltd; Emmecon Ltd; Eurofins Expert Services Oy; Insta ILS Oy; Patria Aviation Oy; Tampere University; Trano Oy; Trueflaw Ltd; and VTT Technical Research Centre of Finland Ltd (VTT).The review summarizes fatigue related research programs and investigations on specific military aircraft since the previous Finnish National Review compiled for the International Committee on Aeronautical Fatigue and Structural Integrity (ICAF) webinar, 30 June 2021

    A Review of Aeronautical Fatigue Investigations in Finland May 2021 - April 2023

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