9,084 research outputs found
QUALITY MANAGEMENT IN A CHANGING ORGANIZATIONAL ENVIRONMENT: LOOKING FOR NEW CONVERSATION TOOLS
Teaching/Communication/Extension/Profession,
Auctions as an Alternate Method of Selling Fish in New England
Selling fish at the landings stage by auction, as opposed to the current practices of selling to middlemen and through cooperatives, has been proposed by several authors. They suggest that fishermen would receive higher prices and that auction competition would improve fish quality.The aim of this study was to compile the rules and procedures of existing fish auctions, and to explore their effect on price formation. This would provide a basis for any who wished to determine the applicability of fish auctions in particular ports. While the findings are relevant to all fish auctions, special emphasis was placed on the performance of New England\u27s two existing fish auctions. Possible improvements to those two auctions were shown. The study found that where minimum requirements in buyer competition and sales volume were met, fish auction prices would accurately reflect value. Fishermen often prefer stable and steadily increasing profits over maximum profits, and thus they support fish auctions on grounds other than that they give the best prices. Auctions are shown to be a very efficient means of marketing fish in terms of time and participant involvement, and are sometimes also used because crews want prices to be publicly displayed
Directed evolution of a fungal ÎČ-glucosidase in Saccharomyces cerevisiae
Additional file 1. Table S1. Primers used in this study
A quantum trampoline for ultra-cold atoms
We have observed the interferometric suspension of a free-falling
Bose-Einstein condensate periodically submitted to multiple-order diffraction
by a vertical 1D standing wave. The various diffracted matter waves recombine
coherently, resulting in high contrast interference in the number of atoms
detected at constant height. For long suspension times, multiple-wave
interference is revealed through a sharpening of the fringes. We use this
scheme to measure the acceleration of gravity
Wheelchair Tire Change
This project consists of a rear wheel wheelchair lift to be designed and created by a Cal Poly senior project team. This project was created for injured veteran Ms. Landeen who has the trouble of tracking mud into her house because of dirty wheelchair tires. The project was presented by the non-profit organization The Quality of Life Plus (QL+) Program. Much like when you remove your shoes coming into your home, Ms. Landeen needs a way to exchange her outdoor wheels for her clean indoor wheels.
The expected outcome of this project is a fully functioning device that will safely and effectively allow Ms. Landeen to independently change her tires.
The following report details the problem given, background research on current products, initial analysis to define the problem, the ideation process performed by the team, concept and prototype designs, design iteration, manufacturing, design verification, and testing of the final design prototype
Thottapalayam virus is genetically distant to the rodent-borne hantaviruses, consistent with its isolation from the Asian house shrew (Suncus murinus)
Thottapalayam (TPM) virus belongs to the genus Hantavirus, family Bunyaviridae. The genomes of hantaviruses consist of three negative-stranded RNA segments (S, M and L) encoding the virus nucleocapsid (N), glycoprotein (Gn, Gc), and polymerase (L) proteins, respectively. The genus Hantavirus contains predominantly rodent-borne viruses, with the prominent exception of TPM virus which was isolated in India in 1964 from an insectivore, Suncus murinus, commonly referred to as the Asian house shrew or brown musk shrew. Analysis of the available TPM virus S (1530 nt) RNA genome segment sequence and the newly derived M (3621 nt) and L (6581 nt) segment sequences demonstrate that the entire TPM virus genome is very unique. Remarkably high sequence differences are seen at the nucleotide (up to S â 47%, M â 49%, L â 38%) and protein (up to N â 54%, Gn/Gc â 57% and L â 39%) levels relative to the rodent-borne hantaviruses, consistent with TPM virus having a unique host association
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Comparative genomics of Salmonella enterica serovars Derby and Mbandaka, two prevalent serovars associated with different livestock species in the UK
Background
Despite the frequent isolation of Salmonella enterica sub. enterica serovars Derby and Mbandaka from livestock in the UK and USA little is known about the biological processes maintaining their prevalence. Statistics for Salmonella isolations from livestock production in the UK show that S. Derby is most commonly associated with pigs and turkeys and S. Mbandaka with cattle and chickens. Here we compare the first sequenced genomes of S. Derby and S. Mbandaka as a basis for further analysis of the potential host adaptations that contribute to their distinct host species distributions.
Results
Comparative functional genomics using the RAST annotation system showed that predominantly mechanisms that relate to metabolite utilisation, in vivo and ex vivo persistence and pathogenesis distinguish S. Derby from S. Mbandaka. Alignment of the genome nucleotide sequences of S. Derby D1 and D2 and S. Mbandaka M1 and M2 with Salmonella pathogenicity islands (SPI) identified unique complements of genes associated with host adaptation. We also describe a new genomic island with a putative role in pathogenesis, SPI-23. SPI-23 is present in several S. enterica serovars, including S. Agona, S. Dublin and S. Gallinarum, it is absent in its entirety from S. Mbandaka.
Conclusions
We discovered a new 37 Kb genomic island, SPI-23, in the chromosome sequence of S. Derby, encoding 42 ORFS, ten of which are putative TTSS effector proteins. We infer from full-genome synonymous SNP analysis that these two serovars diverged, between 182kya and 625kya coinciding with the divergence of domestic pigs. The differences between the genomes of these serovars suggest they have been exposed to different stresses including, phage, transposons and prolonged externalisation. The two serovars possess distinct complements of metabolic genes; many of which cluster into pathways for catabolism of carbon sources
Calcium isotopes in enamel of modern and Plio-Pleistocene East African mammals
Calcium isotope analyses show a depletion of heavy calcium isotopes in vertebrates, compared to food sources along each trophic step. Recent studies show considerable variability of the calcium isotopic composition of bone and teeth in modern mammals, leading to inconclusive interpretations regarding the utility of Ca isotopes for trophic inference in mammal-dominated terrestrial ecosystems. Here, we analyzed modern enamel samples from the Tsavo National Park (Kenya), and fossil enamel samples dated from ca. 4 Ma to 1.6 Ma from the Turkana Basin (Kenya). We found a constancy of taxa ordering between the modern and fossil datasets, suggesting that the diagenesis of calcium isotopes is minimal in fossils. In modern herbivore samples using similar digestive physiologies, browsers are enriched in Ca-44 compared to grazers. Both grazer and browser herbivore tooth enamel is enriched in Ca-44 relative to carnivores by about +0.30 parts per thousand. Used together, carbon and calcium isotope compositions may help refine the structure of the C-3 and C-4 trophic chains in the fossil record. Due to their high preservation potential, combining both carbon and calcium isotope systems represent a reliable approach to the reconstruction of the structure of past ecosystems. (C) 2018 Eisevier B.V. All rights reserved
Interacting dark matter contribution to the Galactic 511 keV gamma ray emission: constraining the morphology with INTEGRAL/SPI observations
We compare the full-sky morphology of the 511 keV gamma ray excess measured
by the INTEGRAL/SPI experiment to predictions of models based on dark matter
(DM) scatterings that produce low-energy positrons: either MeV-scale DM that
annihilates directly into e+e- pairs, or heavy DM that inelastically scatters
into an excited state (XDM) followed by decay into e+e- and the ground state.By
direct comparison to the data, we find that such explanations are consistent
with dark matter halo profiles predicted by numerical many-body simulations for
a Milky Way-like galaxy. Our results favor an Einasto profile over the cuspier
NFW distribution and exclude decaying dark matter scenarios whose predicted
spatial distribution is too broad. We obtain a good fit to the shape of the
signal using six fewer degrees of freedom than previous empirical fits to the
511 keV data. We find that the ratio of flux at Earth from the galactic bulge
to that of the disk is between 1.9 and 2.4, taking into account that 73% of the
disk contribution may be attributed to the beta decay of radioactive 26Al.Comment: 7 pages, 4 figures. Includes minor corrections, and a discussion of
threshold energies in XDM models. Published in JCA
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