北京亦庄半岛幼儿园

正项目地址_中国北京项目面积_8000m~2设计单位_ArkA北京亦庄半岛幼儿园项目是设计团队与半岛教育集团的第二次合作,目标是将蒙特梭利教育理念和建筑设计融为一体,创造出一个更合理的空间和安全的环境,让孩子们能够自由快乐地学习和成长。原有的建筑物是一个开放的空间,整个大空间分作4层。设计团队的首要任务是根据孩子的比例改造空间。在设计时,设计团队加入了许多小房屋的设计,以此让孩子更具有主人感和安全感。对教室的设计是简约的房屋;图书馆则是一个开放空间,在其中央种下一棵树,好似一个乡村小镇的广场;走廊设计成多功能的开放空间,孩子     

Foreign firms in core or peripheral areas? The spatial dimension of job creation and wages in Sub-Saharan Africa

This paper investigates the within-country location choices of a large sample of foreign and domestic firms in 19 Sub-Saharan African countries. We show that foreign firms are more likely to locate in core regions compared to domestic ones but generate significantly more jobs per productive unit in the periphery. We find some evidence that foreign firms generate relatively better jobs in peripheral areas: more skill intensive and better paid. These results highlight a fundamental role that FDI in peripheral areas might play in rebalancing the spatial distribution of economic opportunities in developing countries where highly congested megacities exercise a strong centripetal force.     

Influence of drier inlet temperature during pilot-scale manufacture of rennet casein on the hydration behaviour of the rennet casein in disodium orthophosphate solution

Rennet casein curds were dried in a pilot-scale fluidized bed drier at air-inlet temperatures of 80, 90, 110, 120 or 140°C. As the drier air-inlet temperature was increased, there was a significant increase in hydration time and a significant decrease in hydrated viscosity and viscosity stability following hydration of the dried rennet caseins in 0.4% (w/w) disodium orthophosphate (DSP). The influence of air-inlet temperature during drying on composition, the extent of Maillard reaction, the resolution of the proteins on urea–polyacrylamide gel electrophoresis (PAGE) and cation-exchange fast protein liquid chromatography (FPLC), the dialysability of calcium and phosphorous from a 6  m urea dispersion at pH 4.6, and the particle-size parameters of milled rennet caseins were determined. Relationships between all these latter parameters and the hydration behaviours of the rennet caseins in DSP solution were also studied. Results suggest that the increase in drier air-inlet temperature resulted in a reduction in the mean particle size of milled casein, which was significantly correlated to the changes in hydration behaviour. Hydration times increased significantly and hydrated viscosities decreased significantly with increasing levels of fluorescent Maillard reaction products (MRPs) and with increasing levels of nondialysable calcium and phosphorous in the caseins. It appears that the increase in air-inlet temperature during drying reduced the solubility of colloidal calcium phosphate (CCP), possibly through binding of CCP to the increased levels of MRPs. This change in CCP solubility led to increased difficulty in sequestering CCP from the curd when the pilot-scale rennet caseins were dispersed in the DSP solution, leading to the changes in hydration behaviour.     

Comparing surface residue transfer efficiencies to hands using polar and nonpolar fluorescent tracers

Transfer of chemicals from contaminated surfaces such as foliage, floors, and furniture is a potentially significant source of both occupational exposure and children's residential exposure. Increased understanding of relevant factors influencing transfers from contaminated surfaces to skin and resulting dermal-loading will reduce uncertainty in exposure assessment. In a previously reported study, a fluorescence imaging system was developed, tested, and used to measure transfer of riboflavin residues from surfaces to hands. Parameters evaluated included surface type, surface loading, contact motion, pressure, duration, and skin condition. Results of the initial study indicated that contact duration and pressure were not significant for the range of values tested, but that there are potentially significant differences in transfer efficiencies of different compounds. In the study reported here, experimental methods were refined and additional transfer data were collected. A second fluorescent tracer, Uvitex OB, with very different physicochemical properties than riboflavin, was also evaluated to better characterize the range of transfers that may be expected for a variety of compounds. Fluorescent tracers were applied individually to surfaces and transfers to skin were measured after repeated hand contacts with the surface. Additional trials were conducted to compare transfer of tracers and co-applied pesticide residues. Results of this study indicate that dermal loadings of both tracers increase through the seventh brief contact. Dermal loading of Uvitex tends to increase at a higher rate than dermal loadings of riboflavin. Measurement of co-applied tracer and pesticide suggest results for these two tracers may provide reasonable bounding estimates of pesticide transfer.