948 research outputs found

    Balancing the force budget of plate tectonics along the Nazca/South America plate margin.

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    Job satisfaction and job performance : a meta-analysis

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    A person-environment congruence approach to work-leisure relationships

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    Empirical research on work-leisure relations has generally focused on testing the relative merits of the spillover, compensatory, and segmentation hypotheses. As a departure from this narrow approach, the present research was conducted to determine the interrelationships among personality, job, leisure activity, job satisfaction, and leisure satisfaction using Holland\u27s hexagonal model as a basis for measurement and interpretation. A sample of 371 adults employed in a wide variety of occupations completed a set of four questionnaire measures: the Self-Directed Search, the Minnesota Satisfaction Questionnaire, the Leisure Activities Blank, and the Leisure Satisfaction Scale. Using Iachan\u27s method, comparisons of each subject\u27s three-letter Holland (RIASEC) job, leisure, and personality codes yielded quantitative indices of person-job, person-leisure, and job-leisure congruence. Results indicated that job and leisure satisfaction were positively correlated, but this relationship was not moderated by the fit between job and leisure activity. Unlike job satisfaction, leisure satisfaction was shown to be significantly related to personality type, job, leisure type, and job-leisure congruence. Although significant levels of person-job, person-leisure, and job-leisure congruence existed, the degree of fit between job and personality was unrelated to that between personality and leisure activity. Personality type differentiated levels of person-job and person-leisure congruence, and the degree of fit between subjects\u27 work and leisure was strongly related to the type of work engaged in. These results raise questions about the nature of the congruence construct and the assumed correspondence between the work and nonwork realms of life

    A Study Comparing Religious Education Achievement Scores Between a Group of Parochial School Pupils and Confraternity of Christian Doctrine Pupils

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    Throughout the history of the Catholic Church, teaching, to transmit the Christian message, has been an important function. In the modern Church, the teaching ministry continues to be a primary concern

    Rapid absolute plate motion changes inferred from high-resolution relative spreading reconstructions: A case study focusing on the South America plate and its Atlantic/Pacific neighbors

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    The reconstruction of past plate motions relative to a deemed–to–be–fixed hotspot reference frame relies on the sparse occurrence of intraplate volcanism. Consequently, this absolute reference frame often features a temporal resolution that exceeds the rapid kinematic changes observed in plate–to–plate spreading reconstructions, changes recently shown to occur within less than 5 Ma. In this work we put forward an alternative method based on the study of high–resolution relative plate motion data sets. By studying time periods featuring a relatively high probability of plate motion change across multiple spreading ridges, we are able to identify and quantify (likely) changes in absolute plate motion. Specifically, we implement such approach and provide well–defined estimates for the absolute plate motion changes of South America and neighboring plates Nubia, Antarctica, Somalia, North America and Pacific. We find that kinematic changes for all these plates occur between 9 and 5 Ma. For South America, we identify a change also between 14 and 10 Ma. Lastly, we estimate the torque–variations required upon these plates to generate the inferred kinematic changes, which we find to be between ∼5⋅1023 and ∼20⋅1024 N ⋅ m

    Experimental and theoretical memory diffusion of water in sand

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    International audienceThe basic equations used to study the fluid diffusion in porous media have been set by Fick and Darcy in the mid of the XIXth century but some data on the flow of fluids in rocks exhibit properties which may not be interpreted with the classical theory of propagation of pressure and fluids in porous media (Bell and Nur, 1978; Roeloffs, 1988). Concerning the fluids and the flow, some fluids carry solid particles which may obstruct some of the pores diminishing their size or even closing them, some others may chemically and physically react with the medium enlarging the pores; so permeability changes during time and the flow occurs as if the medium had a memory. In this paper we show with experimental data that the permeability of sand layers may decrease due to rearrangement of the grains and consequent compaction, as already shown qualitatively by Elias and Hajash (1992). We also provide a memory model for diffusion of fluids in porous media which fits well the flux rate observed in five laboratory experiments of diffusion of water in sand. Finally we show that the flux rate variations observed during the experiments are compatible with the compaction of sand, due to the amount of fluid which went through the grains locally, and therefore with the reduction of porosity
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