Strategic Environmental Assessment (SEA) is the process through which the impacts of plans and programmes on the environment are assessed. Objectives, targets and indicators are the tools through which these environme...
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East African forests have been largely converted to agriculture. The remaining forests hold many endangered species but are threatened by the heavy local demand for fuelwood. Here we evaluate fallow land in western Ug...
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In this paper, YSZ-based high performance acetone sensor was successfully developed for intelligent medical service, environmental monitoring, and safety production of smart city. New type spinel electrode sensing mat...
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In this paper, YSZ-based high performance acetone sensor was successfully developed for intelligent medical service, environmental monitoring, and safety production of smart city. New type spinel electrode sensing materials NiGaxAl2-xO4 (x = 0, 0.6, 1 and 1.4) were synthesized by a sol-gel method. Compared to the other sensing electrode materials, NiGa0.6Al1.4O4 had the highest electrochemical catalytic activity to acetone, and the sensor based on NiGa0.6Al1.4O4-SE performed the best sensing performance of -48 mV to 10 ppm acetone. Moreover, the present acetone sensor has a wide detection range of 0.2-1000 ppm, with sensitivity of -45 mV/decade, meeting the field of diabetic non-invasive diagnosis and real-time in-situ environmental monitoring. In addition, the device also performs excellent repeatability, acceptable selectivity, terrific humidity resistance and marvelous long-term stability during continuous measurements over 30 days. Overall, based on its excellent sensing performance, the developed sensor has marvelous application prospects for acetone detection in intelligent medical service, environmental monitoring, and safety production fields of smart city.
The FeCo3Sb12 skutterudite crystal was doped with Bi to act as a filler material for the Bi0.6FeCo3Sb12 formulation. It was prepared by ball milling and spark plasma sintering. The microstructure and thermoelectric pe...
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The FeCo3Sb12 skutterudite crystal was doped with Bi to act as a filler material for the Bi0.6FeCo3Sb12 formulation. It was prepared by ball milling and spark plasma sintering. The microstructure and thermoelectric performance of the bulk skutterudite was evaluated as function of its mechanical alloying process, i.e. ball milling. Rietveld analysis of its XRD spectra indicated that The Bi doping on the Co4Sb12 based skutterudite succeeded in partially filling the voids of the skutterudite, whilst the Fe doping partially substituted the Co sites in the lattice. This serves to simultaneously increase the electrical conductivity whilst reducing the thermal conductivity of the resulting skutterudite. The ball milling times was correlated to the resulting microstructure, and ultimately, its thermoelectric performance. It was found that the moderate milling times (at 15 h) resulted in the best electrical conductivity, given the homogenous distribution of particles. A Maximum ZT value was observed 0.18 for 10 h ball milled sample at 673 K, whilst almost the same value was achieved for the 15 h ball milled sample, i.e. ZT = 0.17 at 673 K. Beyond this milling time, agglomeration of particles after ball milling caused degradation in the overall thermoelectric performance. Thus, this paper presents a strategy optimize the mechanical alloying process parameters to provide improved thermoelectric performance.
Overloaded services, scarce resources, and multiproblem families are among the problems prompting a serious look at coordination of services. This is a sophisticated and promising form of organizational technology tha...
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Overloaded services, scarce resources, and multiproblem families are among the problems prompting a serious look at coordination of services. This is a sophisticated and promising form of organizational technology that may well be, as the author suggests, an important device for improving service efficiency and comprehensiveness. [ABSTRACT FROM AUTHOR]
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