Southern Illinois University Carbondale

About: Southern Illinois University Carbondale is a education organization based out in Carbondale, Illinois, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 13570 authors who have published 24819 publications receiving 667385 citations. The organization is also known as: SIU Carbondale & SIUC.

Gas Sensor Based on Metal−Insulator Transition in VO2 Nanowire Thermistor

Abstract: Using temperature driven sharp metal−insulator phase transition in single crystal VO2 nanowires, the realization of a novel gas sensing concept has been tested. Varying the temperature of the nanowire close to the transition edge, the conductance of the nanowire becomes extremely responsive to the tiny changes in molecular composition, pressure, and temperature of the ambient gas environment. This gas sensing analog of the transition edge sensor radiometry used in astrophysics opens new opportunities in gas sensorics.

Technology investment and business performance

Abstract: relationships between measures of information technology (IT) investment and facets of corporate business performance. The results of our study suggest that IT investments have begun to show results in proving they can make a positive contribution to firm output and labor productivity. However, various measures of IT investment do not appear to have a positive relationship with administrative productivity, showing inconsistent results in terms of business performance. Our analysis suggests that while IT is likely to improve organizational efficiency, its effect on administrative productivity and business performance might depend on such other factors as the quality of a firm’s management processes and ITstrategy links, which can vary significantly across organizations. Measurement of the business value of IT investment has been the subject of considerable debate by academics and practitioners. The term productivity paradox is gaining increasing notoriety as several studies point toward falling productivity and rising IT expenditure in the service sector. Loveman [9] summarizes the research that provides evidence suggesting IT investment produces negligible benefits. Other studies [3] take the position that the “shortfall of evidence” is not “evidence of a shortfall” [3]. Brynjolfsson [3] argues that lack of positive evidence is due to mismeasurements of outputs and inputs, lags in learning and adjustment, redistribution and dissipation of profits, and mismanagement of IT. Our first objective was to reexamine the performance effects of IT investment in light of data collected up to 1994 (see the sidebar, “How the Study Was Done”). We are uncomfortable making such a statement as we have not conducted similar systematic scientific analysis with data later than 1994. We included three measures of IT investments: aggregate IT, client/server systems, including Internet-related systems, and IT infrastructure. We studied firm performance in terms of firm output, measured using value added by the organization and total sales; business results, assessed using return on assets (ROA) and return on equity (ROE) measures of financial performance; and intermediate performance, assessed using labor productivity and administrative productivity. Older studies examining the value of IT investment treat such investment as a monolithic entity. It is reasonable to argue that how investment dollars are differentially allocated among various elements of the IT infrastructure should be examined in tandem with how many dollars are spent cumulatively. Our second objective was to examine the relationships between investments in

Goals for Curriculum Development in Environmental Education

Abstract: (1980). Goals for Curriculum Development in Environmental Education. The Journal of Environmental Education: Vol. 11, No. 3, pp. 42-47.

Detection of Explosives with a Fluorescent Nanofibril Film

Abstract: A new type of fluorescence sensory material has been developed from an alkoxycarbonyl-substituted carbazole-cornered tetracycle Films fabricated from such materials are shown to be efficient in detecting explosive vapor, probably owing to the extended 1D molecular stacking between the component molecules and intrinsic nanoporous morphology thus formed within the film The former facilitates long-range exciton migration, while the latter favors adsorption and diffusion of gaseous adsorbates within the film A combination of these two characteristics enables efficient fluorescence quenching of the film by gaseous quenchers