Effect of pasture and soybean supplementation on fatty acid profile and CLA content in dairy cow milk

Conjugated linoleic acid (CLA) has been related to several beneficial effects on human and animal health (anticancerogens, antiatherogenics, etc.) The main dietary source of CLA for humans are foods derived from ruminants. In dairy products CLA content depends on ruminal bio-hydrogenation of the dietary unsaturated fats and it is also related to the Δ9desaturase activity in the mammary gland. The CLA level of milk is affected by various factors, including diet composition, that seems to play an important role (Jensen, 2002). The aim of this study was to investigate the effect of toasted and raw soybean addition to a mixed diet and..........

High Performances Corrugated Feed Horns for Space Applications at Millimetre Wavelengths

We report on the design, fabrication and testing of a set of high performance corrugated feed horns at 30 GHz, 70 GHz and 100 GHz, built as advanced prototypes for the Low Frequency Instrument (LFI) of the ESA Planck mission. The electromagnetic designs include linear (100 GHz) and dual shaped (30 and 70 GHz) profiles. Fabrication has been achieved by direct machining at 30 GHz, and by electro-formation at higher frequencies. The measured performances on side lobes and return loss meet the stringent Planck requirements over the large (20%) instrument bandwidth. Moreover, the advantage in terms of main lobe shape and side lobes levels of the dual profiled designs has been demonstrated.Comment: 16 pages, 7 figures, accepted for publication in Experimental Astronom

Constraints on the rare tau decays from mu --> e gamma in the supersymmetric see-saw model

It is now a firmly established fact that all family lepton numbers are violated in Nature. In this paper we discuss the implications of this observation for future searches for rare tau decays in the supersymmetric see-saw model. Using the two loop renormalization group evolution of the soft terms and the Yukawa couplings we show that there exists a lower bound on the rate of the rare process mu --> e gamma of the form BR(mu --> e gamma) > C BR(tau --> mu gamma) BR(tau --> e gamma), where C is a constant that depends on supersymmetric parameters. Our only assumption is the absence of cancellations among the high-energy see-saw parameters. We also discuss the implications of this bound for future searches for rare tau decays. In particular, for large regions of the mSUGRA parameter space, we show that present B-factories could discover either tau --> mu gamma or tau --> e gamma, but not both.Comment: 39 pages, 7 figures. Typos corrected, references adde

Simultaneous Embeddability of Two Partitions

We study the simultaneous embeddability of a pair of partitions of the same underlying set into disjoint blocks. Each element of the set is mapped to a point in the plane and each block of either of the two partitions is mapped to a region that contains exactly those points that belong to the elements in the block and that is bounded by a simple closed curve. We establish three main classes of simultaneous embeddability (weak, strong, and full embeddability) that differ by increasingly strict well-formedness conditions on how different block regions are allowed to intersect. We show that these simultaneous embeddability classes are closely related to different planarity concepts of hypergraphs. For each embeddability class we give a full characterization. We show that (i) every pair of partitions has a weak simultaneous embedding, (ii) it is NP-complete to decide the existence of a strong simultaneous embedding, and (iii) the existence of a full simultaneous embedding can be tested in linear time.Comment: 17 pages, 7 figures, extended version of a paper to appear at GD 201

Planck LFI flight model feed horns

this paper is part of the Prelaunch status LFI papers published on JINST: http://www.iop.org/EJ/journal/-page=extra.proc5/jinst The Low Frequency Instrument is optically interfaced with the ESA Planck telescope through 11 corrugated feed horns each connected to the Radiometer Chain Assembly (RCA). This paper describes the design, the manufacturing and the testing of the flight model feed horns. They have been designed to optimize the LFI optical interfaces taking into account the tight mechanical requirements imposed by the Planck focal plane layout. All the eleven units have been successfully tested and integrated with the Ortho Mode transducers.Comment: This is an author-created, un-copyedited version of an article accepted for publication in JINST. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher authenticated version is available online at 10.1088/1748-0221/4/12/T1200

On Embeddability of Buses in Point Sets

Set membership of points in the plane can be visualized by connecting corresponding points via graphical features, like paths, trees, polygons, ellipses. In this paper we study the \emph{bus embeddability problem} (BEP): given a set of colored points we ask whether there exists a planar realization with one horizontal straight-line segment per color, called bus, such that all points with the same color are connected with vertical line segments to their bus. We present an ILP and an FPT algorithm for the general problem. For restricted versions of this problem, such as when the relative order of buses is predefined, or when a bus must be placed above all its points, we provide efficient algorithms. We show that another restricted version of the problem can be solved using 2-stack pushall sorting. On the negative side we prove the NP-completeness of a special case of BEP.Comment: 19 pages, 9 figures, conference version at GD 201

Custos e implantação do consórcio Milho-Capim no sistema Integração Lavoura-Pecuária-Floresta em Vilhena-RO.

Este trabalho teve o objetivo de avaliar os custos de implantação de um consórcio milho safrinha - Brachiaria ruziziensis, para a região de cerrado de Rondônia, especificamente para o município de Vilhena, visando subsidiar as tomadas de decisões do produtor na implantação de um sistema ILPF. A lavoura consorciada foi instalada no Campo Experimental da Embrapa Rondônia, no final de abril de 2009. A estimativa do custo variável de produção foi de R$658,14, ou 2.468 kg.ha-1 de milho em grãos, enquanto o custo fixo foi remunerado pelas culturas de verão (soja e arroz). Como o milho foi bastante comprometido em função do déficit hídrico após a semeadura, sua produção não atingirá o ponto de equilíbrio (2.468 kg.ha-1), e não cobrirá os fatores de produção deste consórcio. A pastagem se encontra em franco desenvolvimento, com boa expectativa de estabelecimento para alimentação bovina. O sistema ILPF milho – pastagem na região deve ser implantado mais cedo, senão o sistema provavelmente não irá remunerar todos os fatores de produção