Clemson University

About: Clemson University is a education organization based out in Clemson, South Carolina, United States. It is known for research contribution in the topics: Population & Control theory. The organization has 20556 authors who have published 42518 publications receiving 1170779 citations. The organization is also known as: Clemson Agricultural College of South Carolina.

Arctic tundra: A source or sink for atmospheric carbon dioxide in a changing environment?

Abstract: Intact cores from the wet coastal arctic tundra at Barrow, Alaska, were used as microcosms in the measurement of CO2 fluxes between peat, vegetation, and atmosphere under controlled conditions. Net ecosystem CO2 uptake was almost twice as high at present summer temperatures (4° C) than at 8°. Lowering the water table from the soil surface to -5 cm also had a pronounced effect in decreasing net ecosystem carbon storage. Warming of the tundra climate could change this ecosystem from a sink for atmospheric CO2 to a source.

A Multiple–Indicator Approach to Municipal Service Evaluation: Correlating Performance Measurement and Citizen Satisfaction across Jurisdictions

Abstract: Early work on municipal service–quality assessment recommended multiple measures of performance from both providers and users. Citizen satisfaction surveys have rivaled their more quantitative counterpart, administrative performance measures, in adoption, but the implication of survey results for action is not well understood by managers or scholars. To achieve meaningfully integrated multiple measures of service quality, we need to explore the dimensions of citizen satisfaction and review patterns of satisfaction across localities. We also need to understand the relationship between administrative performance measures and citizen perceptions. This cross–sectional analysis of municipal citizen satisfaction and performance benchmark data suggests that citizen satisfaction survey results are useful to managers in conjunction with performance–measurement programs as part of a multiple–indicator approach to evaluating municipal service quality. However, understanding citizen perceptions requires a different perspective than that applied to administrative service performance measurement.

Green Advertising and the Reluctant Consumer

Abstract: As ecological concerns evolve and diffuse throughout society, advertisers are interested in developing green (i.e., environmental) messages and are interested in targeting green customer segments. Unfortunately for advertisers, many green consumers have negative attitudes about business, and they often have negative impressions of the advertising industry. Here, this dilemma is examined from a variety of perspectives.

JOINTLESS is a MADS-box gene controlling tomato flower abscission zone development

Abstract: Abscission is a universal and dynamic process in plants whereby organs such as leaves, flowers and fruit are shed, both during normal development, and in response to tissue damage and stress. Shedding occurs by separation of cells in anatomically distinct regions of the plant, called abscission zones (AZs). During abscission, the plant hormone ethylene stimulates cells to produce enzymes that degrade the middle lamella between cells in the AZ. The physiology and regulation of abscission at fully developed AZs is well known, but the molecular biology underlying their development is not. Here we report the first isolation of a gene directly involved in the development of a functional plant AZ. Tomato plants with the jointless mutation fail to develop AZs on their pedicels and so abscission of flowers or fruit does not occur normally. We identify JOINTLESS as a new MADS-box gene in a distinct phylogenetic clade separate from those functioning in floral organs. We propose that a deletion in JOINTLESS accounts for the failure of activation of pedicel AZ development in jointless tomato plants.

3FHL: The Third Catalog of Hard Fermi-LAT Sources

Abstract: We present a catalog of sources detected above 10 GeV by the Fermi Large Area Telescope (LAT) in the first 7 years of data using the Pass 8 event-level analysis. This is the Third Catalog of Hard Fermi-LAT Sources (3FHL), containing 1556 objects characterized in the 10 GeV–2 TeV energy range. The sensitivity and angular resolution are improved by factors of 3 and 2 relative to the previous LAT catalog at the same energies (1FHL). The vast majority of detected sources (79%) are associated with extragalactic counterparts at other wavelengths, including 16 sources located at very high redshift (z > 2). Eight percent of the sources have Galactic counterparts and 13% are unassociated (or associated with a source of unknown nature). The high-latitude sky and the Galactic plane are observed with a flux sensitivity of 4.4 to 9.5 ×10 −11 ph cm −2 s −1 , respectively (this is approximately 0.5 % and 1 % of the Crab Nebula flux above 10 GeV). The catalog includes 214 new γ-ray sources. The substantial increase in the number of photons (more than 4 times relative to 1FHL and 10 times to 2FHL) also allows us to measure significant spectral curvature for 32 sources and find flux variability for 163 of them. Furthermore, we estimate that for the same flux limit of 10 −12 erg cm −2 s −1 , the energy range above 10 GeV has twice as many sources as above 50 GeV, highlighting the importance, for future Cherenkov telescopes, of lowering the energy threshold as much as possible.