A sustainable method for reclaiming silicon (Si) wafers from an end-of-life photovoltaic module is examined in this paper.

This study examines federal employee attitudes since the passage of the Civil Service Reform Act of 1978. By reviewing seven employee surveys conducted by the U.S. Office of Personnel Management since 1979, we examine how attitudes have changed. We then analyze the degree to which organizational effectiveness, job satisfaction, and support for organizational change are affected by customer orientation, supervisory leadership, empowerment, teamwork, training and development, performance management, diversity, family-friendly policies, and labor relations. This study finds that (a) employee attitudes on most dimensions have been mildly positive; (b) employee attitudes somewhat reflect reform policies of each administration, presidential leadership, and environmental change; and (c) perceptions of organizational effectiveness, job satisfaction, and support for organizational change have been affected predominantly by customer orientation, supervisory leadership, empowerment, teamwork, performance evaluation fairness, and performance rewards. Finally, the study suggests that civil service reform integrate long-lasting strategies based on improved responsiveness and competitiveness of federal employees.

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This paper reports the use of waste oyster shells as a novel biofiller for hot-mix asphalt (HMA) pavement applications. The effects of different fractions (e.g., 0, 5, 10, 15 wt %) of oyster shell powder (OSP) on the bitumen performance were investigated. The chemical properties of unfilled and OSP-filled asphalts were characterized by means of thin layer chromatography-ionization detection (TLC-FID), Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Thermal characteristics were examined by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Physical and rheological properties were assessed through penetration, softening point, ductility, and dynamic shear rheometer (DSR) tests. Results showed that OSP addition increased the resins content, as well as the stiffness of blends. No obvious reactions have occurred between the filler and the asphalt. A higher dose of OSP altered the morphology of the binder, whereas lower and intermediate doses improved its thermal stability and enhanced its low-temperature, rutting, and fatigue performances with respect to the plain asphalt. Overall, the waste oyster shells could be used as filler substitute, not only to improve the quality of road pavements but also to reduce the cost of their construction and solve the waste disposal problems.

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