73,974 research outputs found

    Final report on the VEGINECO project

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    Vegetable farming systems in Europe, Final report on the VEGINECO project

    Integrated and Ecological Crop Protection (I/ECP)

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    Manual on integrated and ecological crop protectio

    On the solitons of the Chern-Simons-Higgs model

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    Several issues concerning the self-dual solutions of the Chern-Simons-Higgs model are addressed. The topology of the configuration space of the model is analysed when the space manifold is either the plane or an infinite cylinder. We study the local structure of the moduli space of self-dual solitons in the second case by means of an index computation. It is shown how to manage the non-integer contribution to the heat-kernel supertrace due to the non-compactness of the base space. A physical picture of the local coordinates parametrizing the non-topological soliton moduli space arises .Comment: 27 pages, 3 figures, to appear in The European Physical Journal

    Radiative cooler

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    A method and radiative cooling device for use in passively cooling spaces is described. It is applicable to any level of thermal radiation in vacuum and to high-intensity thermal radiation in non-vacuum environments. The device includes an enclosure nested in a multiplicity of thin, low-emittance, highly-reflective shields. The shields are suspended in a casing in mutual angular relation and having V-shaped spaces defined therebetween for redirecting, by reflection, toward the large openings of the V-shaped spaces, thermal radiation entering the sides of the shields, and emitted to the spaces, whereby successively reduced quantities of thermal radiation are reflected by the surfaces along substantially parallel paths extended through the V-shaped spaces to a common heat sink such as the cold thermal background of space

    Radiological control procedures applicable to radioisotope thermoelectric generator SNAP-27. Volume 1 - Normal operations

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    Radiological control procedures applicable to transport, handling, and storage of the thermoelectric generator SNAP 27 prior to launch during normal condition

    On the derivatives of generalized Gegenbauer polynomials

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    We prove some new formulae for the derivatives of the generalized Gegenbauer polynomials associated to the Lie algebra A2A_2.Comment: 3 pages, no figures; submitted to Theor. Math. Phy

    Active Target Defense Differential Game with a Fast Defender

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    This paper addresses the active target defense differential game where an Attacker missile pursues a Target aircraft. A Defender missile is fired by the Target's wingman in order to intercept the Attacker before it reaches the aircraft. Thus, a team is formed by the Target and the Defender which cooperate to maximize the distance between the Target aircraft and the point where the Attacker missile is intercepted by the Defender missile, while the Attacker tries to minimize said distance. The results shown here extend previous work. We consider here the case where the Defender is faster than the Attacker. The solution to this differential game provides optimal heading angles for the Target and the Defender team to maximize the terminal separation between Target and Attacker and it also provides the optimal heading angle for the Attacker to minimize the said distance.Comment: 9 pages, 8 figures. A shorter version of this paper will be presented at the 2015 American Control Conferenc
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