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Horgan Finbarr G. Ramal Angelee F. Villegas James M. Almazan Maria Liberty P. Bernal Carmencita C. Jamoralin Alexandra Pasang John Michael Orboc Gregorio Agreda Virginia Arroyo Corazon 《Regional Environmental Change》2017,17(5):1355-1367
Regional Environmental Change - This study examines the potential for ecological engineering to enhance the beneficial ecosystem services provided by birds in tropical rice fields. Bird activities... 相似文献
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Glenn J. Stephen Timotius Pasang Benjamin P. Withy 《Journal of Manufacturing Processes》2013,15(1):115-120
As part of an aircraft fleet fatigue life improvement program, investigation has been carried out into the effect pitting corrosion has on bare 7075-T651 which had undergone split sleeve cold hole expansion. Constant amplitude sinusoidal loading was applied to fatigue test coupons which had pitting corrosion induced upon them by a modified cyclic immersion process using a 3.5% NaCl solution. A pit depth of 39–58 μm was found to significantly reduce the increased fatigue life gains achieved by carrying out cold hole expansion. At 137.9 MPa fatigue life was reduced from achieving run out of ten million cycles to an average 371 × 103 cycles, while at 165.5 MPa average fatigue life was reduced from 810 × 103 to 65 × 103 cycles. The fracture surfaces were analysed under a scanning electron microscope where each displayed an individual crack initiation site located on the material surface within the zone of residual circumferential stress. 相似文献
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Municipal solid waste management in the capital city of Indonesia, Jakarta, is examined from a point of view of researchers and waste management practitioners. Major impediments to waste management in Jakarta include non-involvement of stakeholders in planning and decision-making, unskilled staff undertaking the duty, the absence of long-term waste management strategies, and weak coordination between authorities and neighbourhood association workers who undertake primary collection. It was revealed that lack of resources is seen as the least important of all impediments. The success of managing solid waste in Jakarta cannot be separated from the presence and the role of a neighbourhood association, which performs waste collection on a daily basis as well as keeping their respective areas clean by employing their own waste service workers. A neighbourhood-based waste management strategy is a promising solution for Jakarta, because it is more applicable and suitable for Jakarta's context compared to community-based waste management. The performance of this approach is examined and the improvement for wider adoption is discussed for a long-term solution. 相似文献
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