Results 111 to 120 of about 33,369 (167)
The systems design challenge of NEC
IEE and MOD HFI DTC Symposium on People and Systems - Who are we Designing for?, 2005 This paper looks at some of the issues of network-enabled capability (NEC). As the primary vision of UK MOD, NEC, and its US counterpart, network centric warfare (NCW), promise to bring information age concepts to all dimensions of military operations. In the present, first stage of NEC development, concentration is on providing increased connectivity,
Ian Whitworth
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Briefing: Construction (Design and Management) Regulations 2015 and NEC contracts
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law, 2015 Great Britain’s Construction (Design and Management) (CDM) regulations were updated in April 2015. This article explains the key aspects of the changes and how CDM and health and safety more generally interface with the NEC3 Engineering and Construction Contract, one of the most commonly used standard forms of contract in the UK.
Richard Patterson +2 more
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Electric power systems design: The NEC and the IEC approach
Proceedings of 1996 IAS Industrial and Commercial Power Systems Technical Conference, 2002 The purpose of this paper is to compare the techniques and results obtained when a general industrial or commercial building power electrical system is prepared using the United States National Electrical Code/spl copy/ (NEC/spl copy/) and the International Electrotechnical Commission (IEC) Standards.
G. Parise +3 more
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Design methodology and tools for NEC electronics' structured ASIC ISSP
Proceedings of the 2004 international symposium on Physical design, 2004 In this paper, we describe a design methodology and tools for NEC Electronics' structured ASIC, Instant Silicon Solution Platform (ISSP), which is being developed to fill the gap between FPGAs and standard cell-based ASICs. The ISSP has a unique regular-fabric architecture designed to achieve both a short time to production and high-performance LSI ...
Takumi Okamoto +2 more
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Speeding up NEC electromagnetic simulation using GPU technology for antenna design problems
International Journal of Computing Science and Mathematics, 2013 Graphics processing units GPUs have increasingly become an attractive alternative to central processing unit CPU for some of compute-intensive and parallel tasks. This paper presents application of GPU technology to speed up numerical electromagnetic code NEC electromagnetic simulation. Then the GPU-NEC was used to evolve antenna.
Wei Zhang +5 more
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NEC contracts for design–build–operate contracts
Proceedings of the Institution of Civil Engineers - Management, Procurement and Law, 2013 The NEC Engineering and Construction Contract (ECC) is a popular choice for construction and design-and-build contracts in the UK and South Africa. They are also increasingly by being used elsewhere in the world, for example in New Zealand and in Hong Kong. The NEC family of contracts is specifically designed for international use.
Richard L. Patterson, Barry Trebes
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Automated design of a three-dimensional fishbone antenna using parallel genetic algorithm and NEC
IEEE Antennas and Wireless Propagation Letters, 2005 A new antenna configuration, named the three-dimensional fishbone antenna (3DFA), as an improvement of the conventional fishbone antenna, is presented in this letter. It consists of dipoles that may be of nonuniform lengths with unequal spacing and are allowed to tilt in haphazard directions. To achieve a high endfire gain and good impedance match, the
null Xing Chen +2 more
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On validation of NEC-MoM: a useful tool for MF antenna system design
IEEE Antennas and Propagation Society Symposium, 2004., 2004 The first use of NEC by the author and his colleagues in the late 70s was concerned with the problem of the effects of the environment on the radiation pattern of MF broadcast directional arrays. The paper addresses the MF broadcast tower itself and the detail that can (must) be included in the numerical model to achieve a close agreement between ...
J.S. Belrose, S. White
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Design and validation of uniform helical antennas, with varying lengths, using NEC
1998 Symposium on Antenna Technology and Applied Electromagnetics, 1998 For spacecraft applications, the ability to predict the electrical characteristics of such an antenna is essential for the optimization of its size and weight. This paper investigates the effect of varying the length of uniform helical antennas made up of a thin copper tape, wound with a constant pitch angle, 12.8 degrees, on a Styrofoam core.
Nizar Sultan, Tony Pellerin
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MUSTEK ANIM HA, 2016 Antena Yagi adalah antena yang tersusun atas beberapa elemen. elemen-elemen itu memiliki kegunaan yang berbeda-beda. Kegunaan elemen-elemen pada antena Yagi adalah untuk elemen pemantul, elemen peradiasi, dan elemen pengarah. Umumnya tentang antena televisi model Yagi adalah menggunakan frekuensi atas pada pita frekuensi UHF bagian atas, yang ...
Rusli Rusli
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