2,372 research outputs found

    XI.—On Superposed Magnetisms in Iron and Nickel

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    Manual of Quaternions

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    FIB-SEM Nanotomography in Materials and Life Science at EPFL

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    Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 - August 5, 201

    Focused Ion Beam Nano-Tomography Using Different Detectors

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    Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7-August 11, 201

    Influences of physical oceanographic processes on chlorophyll distributions in coastal and estuarine waters of the South Atlantic Bight

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    Coastal and estuarine waters of the South Atlantic Bight are highly productive, with primary production of 600-700 gC/m2/y. While controls and fate of this production are conceptually well understood, the importance of meteorology and physical circulation processes on phytoplankton has not received equivalent attention. Here, we describe the effects of wind stress and tidal currents on temporal and spatial distributions of phytoplankton biomass represented as chlorophyll a (chl a). Moored instruments were deployed and shipboard sampling was conducted in the North Edisto estuary (South Carolina) and adjacent inner shelf waters during four, two-week field studies in May and August 1993, and June and September 1994. Local wind regimes induced upwelling- and downwelling-favorable conditions which strengthened or reduced vertical density stratification in the coastal frontal zone, respectively, and shifted the location of the front. Chl a in shelf waters was more or less homogenous independent of the wind regime, while chl a on the estuary delta was generally vertically stratified. Within the estuary, chl a concentrations were positively correlated with the alongshore component of wind stress; chl a was not correlated with the weaker cross-shelf component of wind stress. Highest chl a occurred during strong downwelling-favorable events. The quick response time to wind forcing (6-12 hrs) implied a direct effect on chl a distributions and not a stimulation of growth processes. The source of the elevated chl a in response to wind forcing was apparently resuspension of settled and epibenthic algal cells. Tidal currents also influenced the vertical distribution and concentration of chl a. Time series sampling on the estuary delta showed that, with increasing velocity of ebb and flood tide currents, the relative contributions of pennate and centric diatoms with attached detritus and sand grains also increased, indicating that tidal resuspension of settled and epibenthic microalgae also occurred. Vertical stratification of chl a (highest concentrations near the bottom) began to degrade upon mixing by tidal currents with velocities as low as 10 cm/sec. Homogenization of 5-7 m water columns was fully achieved at velocities of 20-30 cm/sec. The data document the direct and comparatively immediate (timescales of minuteshours) impact of tidal and wind energy on concentrations and distribution patterns of phytoplankton in coastal and estuarine waters of the South Atlantic Bight

    qtl.outbred: Interfacing outbred line cross data with the R/qtl mapping software

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    <p>Abstract</p> <p>Background</p> <p><b>qtl.outbred </b>is an extendible interface in the statistical environment, R, for combining quantitative trait loci (QTL) mapping tools. It is built as an umbrella package that enables outbred genotype probabilities to be calculated and/or imported into the software package R/<b>qtl</b>.</p> <p>Findings</p> <p>Using <b>qtl.outbred</b>, the genotype probabilities from outbred line cross data can be calculated by interfacing with a new and efficient algorithm developed for analyzing arbitrarily large datasets (included in the package) or imported from other sources such as the web-based tool, GridQTL.</p> <p>Conclusion</p> <p><b>qtl.outbred </b>will improve the speed for calculating probabilities and the ability to analyse large future datasets. This package enables the user to analyse outbred line cross data accurately, but with similar effort than inbred line cross data.</p

    Case management and Think First completion

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    “The final, definitive version of this article has been published in the Journal, Probation Journal, Vol 53 Issue 3, 2006, Copyright The Trade Union and Professional Association for Family Court and Probation Staff, by SAGE Publications Ltd at: http://prb.sagepub.com/ " DOI: 10.1177/0264550506066771This article considers the findings of a small-scale study of the practice of case managers supervising offenders required to attend the Think First Group. It explores the interface between one-to-one and group-based work within multi-modal programmes of supervision and seeks to identify those practices that support individuals in completing a group.Peer reviewe

    Glial glutamate transporters and maturation of the mouse somatosensory cortex

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    In the adult nervous system, glutamatergic neurotransmission is tightly controlled by neuron-glia interactions through glial glutamate reuptake by the specific transporters GLT-1 and GLAST. Here, we have explored the role of these transporters in the structural and functional maturation of the somatosensory cortex of the mouse. We provide evidence that GLT-1 and GLAST are early and selectively expressed in barrels from P5 to P10. Confocal and electron microscopy confirm that the expression is restricted to the astroglial membrane. By P12, and despite an increased global expression as observed by immunoblotting, the barrel pattern of GLAST and GLT-1 staining is no longer evident. In P10 GLT-1 -/- and GLAST -/- mice, the cytoarchitectural segregation of the barrels is preserved. However, at P9-10, the functional response to whisker stimulation, measured by deoxyglucose uptake, is markedly decreased in GLT-1 -/- and GLAST -/- mice. The role of GLAST is transient since the metabolic response is already restored at P11-12 in GLAST -/- mice and remains unchanged in adulthood. However, deletion of GLT-1 seems to impair the functional metabolic response until adulthood. Our data suggest that astrocyte-neuron interactions via the glial glutamate transporters are involved in the functional maturation of the whisker representation in the somatosensory cortex

    Prosumer and Product Design Through Digital Tools

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    Currently, the growing interest of users and consumers in the participation of the creative process has led to the typical “maker culture” practices. Consequently, there is an increasing number of prosumers - users who produce what they consume - who want to be part of the design and transformation process of the products. In order to achieve it, prosumers have begun to use digital tools that greatly facilitate this task. These tools could vary depending on the number of users involved in the process and the freedom of participation that they have on the product. It has been presented a number of qualitative classification of cases involving the end user, individually or collectively, that has influenced as a prosumer in the product design process. The objective is to study the use of digital tools in the creative phase within the design process according to their different levels of participation with respect to the final product. The cases are shown in four tables according to the number of users involved in the process and their level of participation. In these tables, other important aspects related to the study of digital tools such as the type of contribution of the prosumer to the product or the design phase in which he participates will be identified. In conclusion, this work will show if there is a pattern in the use of digital tools according to the number of users involved in the process and the freedom of participation that they have and which are the reasons for their use
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