4,186 research outputs found

    Crystal structure analysis of intermetallic compounds

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    Study concerns crystal structures and lattice parameters for a number of new intermetallic compounds. Crystal structure data have been collected on equiatomic compounds, formed between an element of the Sc, Ti, V, or Cr group and an element of the Co or Ni group. The data, obtained by conventional methods, are presented in an easily usable tabular form

    The Problem of Planting Louisiana Swamplands when Nutria (Myocastor Coypu) are Present

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    Logging of baldcypress (Taxodium distichum) in the swamps of the southeastern United States is once again becoming common and an area of particular concern in Louisiana is the regeneration of cypress in its natural environment. One way to ensure the proper stocking of cypress is to plant seedlings, but nutria usually damage or destroy newly planted seedlings and are a deterrent to cypress regeneration in flooded areas. In 1985 cypress seedlings were planted in a flooded logged area and in an area where flooding was preventing the establishment of natural seedlings. Nutria destroyed 86% of the seedlings in the Barataria watershed (logged area) and 100% in the Lake Verret watershed. One-half of the Barataria seedlings were protected with Vexar seedling protectors, but these were no deterrent to nutria. A second planting was made in the Lake Verret basin and the seedlings surrounded by chicken wire fencing. Nutria did no damage to the protected seedlings. A third planting was made in the Lake Verret area in September 1985 to determine if nutria would destroy late planted seedlings. Once again no nutria damage was observed. Implications are that spring-planted seedlings need protection to allow them to establish a root system making them more difficult for the nutria to pull up. Fall-planted seedlings appear to be less susceptible to damage because of the abundant food supply provided by aquatic plants that grow during the summer and fall. Once firmly established, cypress seedlings are less susceptible to nutria damage

    Simulation-assisted control in building energy management systems

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    Technological advances in real-time data collection, data transfer and ever-increasing computational power are bringing simulation-assisted control and on-line fault detection and diagnosis (FDD) closer to reality than was imagined when building energy management systems (BEMSs) were introduced in the 1970s. This paper describes the development and testing of a prototype simulation-assisted controller, in which a detailed simulation program is embedded in real-time control decision making. Results from an experiment in a full-scale environmental test facility demonstrate the feasibility of predictive control using a physically-based thermal simulation program

    The Problem of Planting Louisiana Swamplands when Nutria (\u3cem\u3eMyocastor coypu\u3c/em\u3e) are Present

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    Logging of baldcypress (Taxodium distichum) in the swamps of the southeastern United States is once again becoming common and an area of particular concern in Louisiana is the regeneration of cypress in its natural environment. One way to ensure the proper stocking of cypress is to plant seedlings, but nutria usually damage or destroy newly planted seedlings and are a deterrent to cypress regeneration in flooded areas. In 1985 cypress seedlings were planted in a flooded logged area and in an area where flooding was preventing the establishment of natural seedlings. Nutria destroyed 86% of the seedlings in the Barataria watershed (logged area) and 100% in the Lake Verret watershed. One-half of the Barataria seedlings were protected with Vexar seedling protectors, but these were no deterrent to nutria. A second planting was made in the Lake Verret basin and the seedlings surrounded by chicken wire fencing. Nutria did no damage to the protected seedlings. A third planting was made in the Lake Verret area in September 1985 to determine if nutria would destroy late planted seedlings. Once again no nutria damage was observed. Implications are that spring-planted seedlings need protection to allow them to establish a root system making them more difficult for the nutria to pull up. Fall-planted seedlings appear to be less susceptible to damage because of the abundant food supply provided by aquatic plants that grow during the summer and fall. Once firmly established, cypress seedlings are less susceptible to nutria damage

    The role of ECL2 in CGRP receptor activation: a combined modelling and experimental approach

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    The calcitonin gene-related peptide (CGRP) receptor is a complex of a calcitonin receptor-like receptor (CLR), which is a family B G-protein-coupled receptor (GPCR) and receptor activity modifying protein 1. The role of the second extracellular loop (ECL2) of CLR in binding CGRP and coupling to Gs was investigated using a combination of mutagenesis and modelling. An alanine scan of residues 271–294 of CLR showed that the ability of CGRP to produce cAMP was impaired by point mutations at 13 residues; most of these also impaired the response to adrenomedullin (AM). These data were used to select probable ECL2-modelled conformations that are involved in agonist binding, allowing the identification of the likely contacts between the peptide and receptor. The implications of the most likely structures for receptor activation are discussed.</jats:p

    Role of affective attitudes and anticipated affective reactions in predicting health behaviors

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    Objective: Two measures of affect-affective attitude (AA) and anticipated affective reaction (AAR)- have frequently been used individually, but rarely simultaneously, in correlational studies predicting health behaviors. This research assessed their individual and combined impact in predicting intention and action for a range of health behaviors, controlling for theory of planned behavior (TPB) variables. Method: Self-reported intentions and performance of health behaviors were the main outcome measures. Design: Study 1 is a meta-analysis of published studies (k = 16) measuring the relevant variables. In Study 2, adults (N = 426) completed questionnaires assessing TPB variables, past behavior, AA, AAR, and subsequent behavior for a range of health behaviors. Results: Across both studies, AA and AAR were only moderately intercorrelated, although both had significant correlations with both intentions and behavior. AA was a significant predictor of intentions and behavior after controlling for TPB variables (Studies 1 and 2) plus past behavior (Study 2). In Study 1, AAR was a significant predictor of behavior, but not intentions, when controlling for TPB variables. In Study 2, AAR was a significant predictor of intentions when controlling for both TPB variables plus past behavior (Study 2), but was not a significant predictor of behavior when controlling for either of these variables. Several relationships were moderated by health-behavior category. Conclusions: Both AA and AAR are important predictors of health behaviors and can have independent effects on intentions and action. Studies manipulating both variables to test their independent and combined effects on behavior change are required

    Entry in the ADHD drugs market: Welfare impact of generics and me-toos

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    Recent decades have seen a growth in treatments for attention deficit hyperactivity disorder (ADHD) including many branded and generic drugs. In the early 2000's, new drug entry dramatically altered market shares. We estimate a demand system for ADHD drugs and assess the welfare impact of new drugs. We find that entry induced large welfare gains by reducing prices of substitute drugs, and by providing alternative delivery mechanisms for existing molecules. Our results suggest that the success of follow-on patented drugs may come from unanticipated innovations like delivery mechanisms, a factor ignored by proposals to retard new follow-on drug approvals

    PAN AIR: A computer program for predicting subsonic or supersonic linear potential flows about arbitrary configurations using a higher order panel method. Volume 2: User's manual (version 3.0)

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    A comprehensive description of user problem definition for the PAN AIR (Panel Aerodynamics) system is given. PAN AIR solves the 3-D linear integral equations of subsonic and supersonic flow. Influence coefficient methods are used which employ source and doublet panels as boundary surfaces. Both analysis and design boundary conditions can be used. This User's Manual describes the information needed to use the PAN AIR system. The structure and organization of PAN AIR are described, including the job control and module execution control languages for execution of the program system. The engineering input data are described, including the mathematical and physical modeling requirements. Version 3.0 strictly applies only to PAN AIR version 3.0. The major revisions include: (1) inputs and guidelines for the new FDP module (which calculates streamlines and offbody points); (2) nine new class 1 and class 2 boundary conditions to cover commonly used modeling practices, in particular the vorticity matching Kutta condition; (3) use of the CRAY solid state Storage Device (SSD); and (4) incorporation of errata and typo's together with additional explanation and guidelines
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