40,752 research outputs found

    Biologically Significant Illinois Streams: An Evaluation of the Streams of Illinois based on Aquatic Biodiversity: Part 1

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    Part 1: Text. See Reference ID-1365 for Part 2: AtlasReport issued on: December 31, 1991INHS Technical Report prepared for Illinois Dept. of Conservation, Illinois Dept. of Energy and Natural Resource

    Child Wellbeing in Two-Parent Families: How Do Characteristics and Relationships Matter?

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    We use data from the Fragile Families and Child Wellbeing Study to examine the role of individual and family characteristics, as well as mother-father and parent-child relationships, with regard to differences in wellbeing for children living with their biological mother and either their biological father or a social father. We find that accounting for these factors produces a large decrease in the association between two-parent family type and cognitive skills, but does little to explain the association between family type and externalizing behavior problems, given suppressor effects of several of the father characteristics and relationship measures. Furthermore, results from Blinder-Oaxaca decompositions suggest that differences in cognitive skills can largely be explained by differences in the characteristics and behaviors of the individuals comprising biological- and social-father families, whereas differences in externalizing behavior problems predominantly reflect differences in returns to (effects of) these characteristics and behaviors for children in the two family types.parents, children, relationships, welfare, wellbeing, martial status

    Biological Assessments of Six Selected Fishes, Amphibians, and Mussels in Illinois

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    ID: 8758; issued November 1, 1996INHS Technical Report prepared for Illinois Department of Natural Resources, Division of Natural Heritag

    Geometry and Destiny

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    The recognition that the cosmological constant may be non-zero forces us to re-evaluate standard notions about the connection between geometry and the fate of our Universe. An open Universe can recollapse, and a closed Universe can expand forever. As a corollary, we point out that there is no set of cosmological observations we can perform that will unambiguously allow us to determine what the ultimate destiny of the Universe will be.Comment: 7 pages, Gravity Research Foundation Essa

    Influence of social and work exchange relationships on organizational citizenship behavior, The

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    Previous studies explain situational antecedents of OCB using social exchange theory. However, the effects of factors such as perceptions of job characteristics on OCB seem to require a different explanatory mechanism. We propose that these effects can be explained through a new exchange relationship that we call work exchange. We develop a theory for the situational antecedents of OCB that includes economic, work, and social exchange relationships. The theory is tested using structural equations.exchange relationship; organizational citizenship behavior; organizational commitment; perceived organizational support; job characteristics;

    Cytotoxicity Study Of Mezzetiaparviflorabecc. Woodbark

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    The cytotoxic activity of acetone insoluble extract of MezzetiaparvifloraBecc. Wood bark was evaluated on HeLa cell line and it was compared with normal vero cell line to confirming the use of the plant as a traditional medicine for tumor. The experiment with normal vero cell line using MTT assay showed a percentage of cell viability of 96.8% at1000 µg of concentration which was not increase with the increase of concentration of the extract. Whereas, the experiment on HeLa cell line showed a low cytotoxic activity with the viability percentage was found to be 87.4% at1000μg/ml. Therefore the extract was categorized as non-toxic and the next studies is necessary to explore the mechanism liable of the using of the plant extract as anticancer traditional

    Probing the Gravitational Wave Signature from Cosmic Phase Transitions at Different Scales

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    We present a new signature by which to one could potentially discriminate between a spectrum of gravitational radiation generated by a self-ordering scalar field vs that of inflation, specifically a comparison of the magnitude of a flat spectrum at frequencies probed by future direct detection experiments to the magnitude of a possible polarization signal in the Cosmic Microwave Background (CMB) radiation. In the process we clarify several issues related to the proper calculation of such modes, focusing on the effect of post-horizon-crossing evolution.Comment: 4 pages, Phys. Rev D version (revised in response to referee's comments

    Interpolation of the Josephson interaction in highly anisotropic superconductors from a solution of the two dimensional sine-Gordon equation

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    In this paper we solve numerically the two dimensional elliptic sine-Gordon equation with appropriate boundary conditions. These boundary conditions are chosen to correspond to the Josephson interaction between two adjacent pancakes belonging to the same flux-line in a highly anisotropic superconductor. An extrapolation is obtained between the regimes of low and high separation of the pancakes. The resulting formula is a better candidate for use in numerical simulations than previously derived formulas.Comment: 18 pages, 9 figure

    Molecular Dynamics of pancake vortices with realistic interactions: Observing the vortex lattice melting transition

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    In this paper we describe a version of London Langevin molecular dynamics simulations that allows for investigations of the vortex lattice melting transition in the highly anisotropic high-temperature superconductor material Bi2_2Sr2_2CaCu2_2O8+δ_{8+\delta}. We include the full electromagnetic interaction as well as the Josephson interaction among pancake vortices. We also implement periodic boundary conditions in all directions, including the z-axis along which the magnetic field is applied. We show how to implement flux cutting and reconnection as an analog to permutations in the multilevel Monte Carlo scheme and demonstrate that this process leads to flux entanglement that proliferates in the vortex liquid phase. The first-order melting transition of the vortex lattice is observed to be in excellent agreement with previous multilevel Monte Carlo simulations.Comment: 4 figure
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