6,953 research outputs found

    Increasing security of supply by the use of a local power controller during large system disturbances

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    This paper describes intelligent ways in which distributed generation and local loads can be controlled during large system disturbances, using Local Power Controllers. When distributed generation is available, and a system disturbance is detected early enough, the generation can be dispatched, and its output power can be matched as closely as possible to local microgrid demand levels. Priority-based load shedding can be implemented to aid this process. In this state, the local microgrid supports the wider network by relieving the wider network of the micro-grid load. Should grid performance degrade further, the local microgrid can separate itself from the network and maintain power to the most important local loads, re-synchronising to the grid only after more normal performance is regained. Such an intelligent system would be a suitable for hospitals, data centres, or any other industrial facility where there are critical loads. The paper demonstrates the actions of such Local Power Controllers using laboratory experiments at the 10kVA scale

    Discourse and identity in a corpus of lesbian erotica

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    This article uses corpus linguistic methodologies to explore representations of lesbian desires and identities in a corpus of lesbian erotica from the 1980s and 1990s. We provide a critical examination of the ways in which “lesbian gender,” power, and desire are represented, (re-)produced, and enacted, often in ways that challenge hegemonic discourses of gender and sexuality. By examining word frequencies and collocations, we critically analyze some of the themes, processes, and patterns of representation in the texts. Although rooted in linguistics, we hope this article provides an accessible, interdisciplinary, and timely contribution toward developing understandings of discursive practices surrounding gender and sexuality

    Analysis of surface tris (2,3-dibromopropyl) phosphate on chlorobutyl rubber SCAPE suits

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    Tris (2,30-dibromopropyl) phosphate was used to confer flame retardant properties on butyl rubber formulations used in protective clothing such as the self-contained atmospheric protective ensembles (SCAPE suits) worn at Kennedy Space Center in support of Apollo, Skylab, and Apollo-Soyuz missions since 1966. Because tris (2,3-dibromopropyl) phosphate is mutagenic, surface concentrations of the compound in SCAPE suits were investigated as were as potential methods of removing or isolating it. Analytical procedures for determining surface concentrations of the tris compound on non-porous materials are described. Soap-and-water washing is the most efficient method of removing the compound from fabricated SCAPE suits and unused material

    Harvest index of lupins, Low tillering cereals and Maturity by sowing date in cereals.

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    Trial 87GE21 Effect of plant density on branching, pod setting and yield development of lupins. Location: Geraldton To determine the influence of plant density and between-plant variability in vegetative growth on the branching, pod setting and yield development of lupins Trial 87GE9 Chemicals to control vegetative growth and improve pod set in lupins. Location: West Binnu To examine the effect of a number of growth regulating chemicals on the branching, pod setting and yield of lupins under conditions favoring high biomass production. Trial 87GE19 Chemicals to control vegetative growth and improve pod set in lupins. Location: Nabawa To examine the effect of a number of growth regulating chemicals on the branching, pod setting and yield of lupins under conditions favouring high biomass production. Trial 87GE72 Effect of plant density on growth and yield of lupins. Location: South Yuna To determine the influence of plant density on the growth, branching, pod setting and yield development of branching and reduced branching lupins under conditions producing different levels of biomass Trial 87E34 Effect of sowing time on yield of lupin varieties. Location: Esperance Downs Research Station. Lupins are well adapted to the cooler, long-season environments of the southern coastal sandplain. of Western Australia. This trial aims to help establish varietal characteristics required to produce high-yielding lupin crops in the cool, long-season environment of southern Australia. The specific aim is to determine the influence of sowing date on the growth and yield of lupin varieties differing in maturity and branching habit in the south-coast environment. LVT Sampling - 1986 and 1987 seasons - Effect of genotype and environment on growth, yield components, harvest index and yield of lupins. Low harvest index (H.I.) is often suggested as the cause of poor lupin seed yields, and it is argued that all vegetative lupin crops have inherently poor pod set and low harvest index. By sampling LVT\u27s across a wide range of sites in 1986 and selected sites in 1987, we aimed to determine the effect of environment on lupin growth, branching, seed yield, H.I. and yield components. Sampling of two branching genotypes and a reduced branching line would permit the assessment of genotypic effects and any G x E interactions. Trial 87C66 Effect of maturity and sowing date on wheat and barley. Location Chapman Research Stations Two similar trials at North Mullewa and East Chapman were not harvested due to severe drought and high weed populations, respectively. Dr J. Hamblin\u27s summary reports the results of three further sowing date trials

    Endolysosomes Are the Principal Intracellular Sites of Acid Hydrolase Activity.

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    The endocytic delivery of macromolecules from the mammalian cell surface for degradation by lysosomal acid hydrolases requires traffic through early endosomes to late endosomes followed by transient (kissing) or complete fusions between late endosomes and lysosomes. Transient or complete fusion results in the formation of endolysosomes, which are hybrid organelles from which lysosomes are re-formed. We have used synthetic membrane-permeable cathepsin substrates, which liberate fluorescent reporters upon proteolytic cleavage, as well as acid phosphatase cytochemistry to identify which endocytic compartments are acid hydrolase active. We found that endolysosomes are the principal organelles in which acid hydrolase substrates are cleaved. Endolysosomes also accumulated acidotropic probes and could be distinguished from terminal storage lysosomes, which were acid hydrolase inactive and did not accumulate acidotropic probes. Using live-cell microscopy, we have demonstrated that fusion events, which form endolysosomes, precede the onset of acid hydrolase activity. By means of sucrose and invertase uptake experiments, we have also shown that acid-hydrolase-active endolysosomes and acid-hydrolase-inactive, terminal storage lysosomes exist in dynamic equilibrium. We conclude that the terminal endocytic compartment is composed of acid-hydrolase-active, acidic endolysosomes and acid hydrolase-inactive, non-acidic, terminal storage lysosomes, which are linked and function in a lysosome regeneration cycle.This work was supported by MRC research grant MR/M010007/1. The CIMR is supported by Wellcome Trust Strategic Award 100140. The Cellomics ArrayScan™ VTi High Content Screening Microscope, Zeiss LSM710 confocal microscope and FEI Tecnai G2 Spirit BioTWIN transmission EM were purchased with Wellcome Trust grants 079919 and 093026. LJD is supported by a BBSRC industrial CASE studentship with GSK Research and Development Ltd. We thank Sally Gray for preparing and sequencing pLXIN constructs and Matthew Gratian for help with light microscopy and analytical software.This is the final version of the article. It first appeared from Elsevier via https://doi.org/ 10.1016/j.cub.2016.06.04

    Effective Hamiltonian Approach to Hyperon Beta Decay with Final-State Baryon Polarization

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    Using an effective Hamiltonian approach, we obtain expressions for hyperon beta decay final-state baryon polarization. Terms through second order in the energy release are retained. The resulting approximate expressions are much simpler and more compact than the exact expressions, and they agree closely with them.Comment: 1 Figure Will appear in Phys Rev D 60 Article 117505 (Dec 1, 1999
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