Indiana University

About: Indiana University is a education organization based out in Bloomington, Indiana, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 64480 authors who have published 150058 publications receiving 6392902 citations. The organization is also known as: Indiana University system & indiana.edu.

FLUXNET: A New Tool to Study the Temporal and Spatial Variability of Ecosystem-Scale Carbon Dioxide, Water Vapor, and Energy Flux Densities

Abstract: FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140 sites are operating on a long-term and continuous basis. Vegetation under study includes temperate conifer and broadleaved (deciduous and evergreen) forests, tropical and boreal forests, crops, grasslands, chaparral, wetlands, and tundra. Sites exist on five continents and their latitudinal distribution ranges from 70°N to 30°S. FLUXNET has several primary functions. First, it provides infrastructure for compiling, archiving, and distributing carbon, water, and energy flux measurement, and meteorological, plant, and soil data to the science community. (Data and site information are available online at the FLUXNET Web site, http://www-eosdis.ornl.gov/FLUXNET/.) Second, the project supports calibration and flux intercomparison activities. This activity ensures that data from the regional networks are intercomparable. And third, FLUXNET supports the synthesis, discussion, and communication of ideas and data by supporting project scientists, workshops, and visiting scientists. The overarching goal is to provide information for validating computations of net primary productivity, evaporation, and energy absorption that are being generated by sensors mounted on the NASA Terra satellite. Data being compiled by FLUXNET are being used to quantify and compare magnitudes and dynamics of annual ecosystem carbon and water balances, to quantify the response of stand-scale carbon dioxide and water vapor flux densities to controlling biotic and abiotic factors, and to validate a hierarchy of soil–plant–atmosphere trace gas exchange models. Findings so far include 1) net CO 2 exchange of temperate broadleaved forests increases by about 5.7 g C m −2 day −1 for each additional day that the growing season is extended; 2) the sensitivity of net ecosystem CO 2 exchange to sunlight doubles if the sky is cloudy rather than clear; 3) the spectrum of CO 2 flux density exhibits peaks at timescales of days, weeks, and years, and a spectral gap exists at the month timescale; 4) the optimal temperature of net CO 2 exchange varies with mean summer temperature; and 5) stand age affects carbon dioxide and water vapor flux densities.

Organizational citizenship behavior: its nature and antecedents

Abstract: It is argued here that a category of performance called citizenship behavior is important in organizations and not easily explained by the same incentives that induce entry, conformity to contractual role prescriptions, or high production A study of 422 employees and their supervisors from 58 departments of two banks sought to elaborate on the nature and predictors of citizenship behavior Results suggest that citizenship behavior includes at least two separate dimensions Altruism, or helping specific persons, and Generalized Compliance, a more impersonal form of conscientious citizenship Job satisfaction, as a measure of chronic mood state, showed a direct predictive path to Altruism but not Generalized Compliance Rural background had direct effects on both dimensions of citizenship behavior The predictive power of other variables (e g , leader supportiveness as assessed independently by co-workers, personality measures) varied across the two dimensions of citizenship behavior

A meta-analytic review of attitudinal and dispositional predictors of organizational citizenship behavior

Abstract: A quantitative review of 55 studies supports the conclusion that job attitudes are robust predictors of organizational citizenship behavior (OCB). The relationship between job satisfaction and OCB is stronger than that between satisfaction and in-role performance, at least among nonmanagerial and nonprofessional groups. Other attitudinal measures (perceived fairness, organizational commitment, leader supportiveness) correlate with OCB at roughly the same level as satisfaction. Dispositional measures do not correlate nearly as well with OCB (with the exception of conscientiousness). The most notable moderator of these correlations appears to be the use of self- versus other-rating of OCB; self-ratings are associated with higher correlations, suggesting spurious inflation due to common method variance, and much greater variance in correlation. Differences in subject groups and work settings do not account for much variance in the relationships. Implications are noted for theory, practice, and strategies for future research on OCB.

The ATLAS Experiment at the CERN Large Hadron Collider

Abstract: The ATLAS detector as installed in its experimental cavern at point 1 at CERN is described in this paper. A brief overview of the expected performance of the detector when the Large Hadron Collider begins operation is also presented.