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排序方式: 共有482条查询结果,搜索用时 15 毫秒
1.
RICHARD RONALD 《Housing Studies》2007,22(4):473-493
Distinguishable patterns of mass homeownership have emerged across industrialised societies in recent decades, and have become increasingly central in comparative analyses of housing systems. This paper examines the nature of differences and similarities within and between two particular groups of societies where owner occupation dominates housing demand and policy systems, one constituted of English-speaking, Anglo-Saxon societies, and another of East Asian societies. The paper considers the potential of forming loose models based on core divergences in terms of systems, regimes and socio-ideological relationships. The aim is to further illustrate interactions between housing systems and welfare regimes in international contexts. Comparisons of housing and welfare elements are broadly related between societies, rather than quantitatively isolated, as systems are substantially variegated across the East Asian region. However, a loose system-model provides considerable insight into convergence within the group in regards to how housing systems have served a minimal social-welfare regime type. 相似文献
2.
RICHARD C. HULA 《Journal of Urban Affairs》1985,7(3):39-56
This paper attempts to measure the effect of a court-ordered desegregation plan on three aspects of the housing market in Dallas County, Texas. The indicators include sale price, number of sales, and proportion of home sales financed by conventional mortgages. Monthly data from 1969 to 1979 are analyzed using Box-Jenkins time series models. After best fit models are determined, various intervention terms are introduced into the models to assess the impact of both a 1975 Circuit Court Order and a 1976 District Court Order. The analysis suggests neither order had a measurable effect on the housing market in Dallas. 相似文献
3.
Sucrose crystallization in thin films (50–55 μm) was studied, using a videomicroscopy technique, at conditions encountered during hard panning processes. No nucleation occurred in unseeded films, while a linear increase in seeded crystals occurred during drying. Crystal growth rate increased with temperature (25–30°C) and with air velocity (2.4–12.5 m/sec), but did not change with varying sucrose concentrations (70–76% w/w) and relative humidities (0–66% at 30°C). FD & C Yellow No. 5 food coloring in the dye form (0.05–0.5 g/100 mL) showed no effects while similar concentrations in the lake form inhibited crystal growth rate. 相似文献
4.
A study was conducted from 1978 to late 1984 of the survival of inner-city street trees planted by the Oakland, California urban forestry program. The tree survival rate of approximately 60 to 70 percent from the trees planted in neighborhood parkways through urban forestry sponsored block parties contrasted sharply with less than one percent survival of trees planted earlier by the Model Cities program without community participation or ceremonial plantings. Explanations for the high tree survival were tested using participant observation, interviews with residents, and a small panel. Tree survival was not found to be related to the explanations provided by urban forestry ideology; namely, that residents had been educated to hold both instrumental and expressive values toward trees. Rather, the explanation appeared to be the function of an unintended solution to the issue of parkway ownership. The tree planting process which included species selection meetings and tree planting ceremonies tended to define the parkway trees as a resident's property, thus decreasing the significance of the parkway-property barrier. The generality of the Oakland illustration is discussed. 相似文献
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ANN M. GUENTERT RABI H. MOHTAR RICHARD H. LINTON MARK TAMPLIN JOHN B. LUCHANSKY 《Journal of food process engineering》2006,29(1):89-117
Listeria monocytogenes grows at refrigeration temperatures (5C or below) and tolerates various environmental stressors. The Food and Drug Administration specifies a zero tolerance for this pathogen in certain ready‐to‐eat processed foods. Modeling its dynamic behavior to fluctuation in temperature at various pH levels is critical to the safety of food. This study presents linear and nonlinear models to predict the behavior of L. monocytogenes in pH‐modified chicken salad at various cold storage and temperature abuse conditions. A linear model of the kinetics accounting for simple and interactive effects of storage time, temperature and pH was developed. Predictions of the linear model were inconsistent with laboratory observations. The limitations of the linear model were reflected in the poor correlation of model predictions to the observed values (r2 = 0.58). A proposed nonlinear model was therefore used to model the observed data. The four model parameters (N(0), Cc(0), kmax and Nres ) were optimized for each of the nine treatments. Correlation coefficient (r2) values ranged from 0.70 (pH 5.2, 7.2C) to 0.99 (pH 4.0, 21.1C), indicating an improved accuracy. Developing a functional and validated microbial predictive model for chicken salad requires further analyses and collection of data at additional pH and temperature values to determine a single set of parameter values that would represent the microbial behavior at the full range of pH and temperatures observed under storage conditions. Future experiments should address the adaptive nature of L. monocytogenes, as the response to environmental stressors affects the survival of the organism in food systems. 相似文献
8.
RICHARD A. EPPLER 《Journal of the American Ceramic Society》1983,66(11):794-801
The system Zn2 TiO4 -Co2 TiO4 -Ni2 TiO4 yields a bright green pigment with the orthotitanate spinel structure. Brick-red, orange, and brown pigments are found in the system Zn2 TiO4 -Co2 TiO4 -Ni2 TiO4 . 相似文献
9.
Four samples of kaolinite were investigated to determine the exothermic reaction enthalpy by differential thermal calorimetry. The measured 9 kcal/mol for the 980°C exothermic reaction enthalpy corresponds to the calculated heat of crystallization of silica at this temperature. Literature evidence discounts the crystallization of the other participating phases, mullite and silicon spinel. An NaOH extraction technique was used to remove the amorphous silica from a kaolinite fired at 850°C; this extraction removed the 980°C exotherm. It is tentatively suggested, therefore, that most of the heat release at 980°C on firing kaolinite accompanies the reaction SiO2 (amorphous) → SiO2 (β-quartz). 相似文献
10.
CHOKKALINGAM PRIYA GANESSIN ARAVIND WILSON RICHARD THILAGARAJ 《Bulletin of Materials Science》2016,39(2):345-351
Titanium (Ti) used as condenser material in nuclear power plants encounter severe biofouling in marine environment which in turn affects the efficiency of the metal. To reduce the biofouling by marine microorganisms, surface modification of the Ti was carried out by anodization process to obtain nanotubes (TiO2-NTs). The electrolyte solution containing 1% of ammonium fluoride resulted in uniform growth of TiO2-NTs. TiO2-NTs were further coated with chemically synthesized copper nanoparticles (NT-CuNP) using 3-amino propyl triethoxy silane as a coupling agent. NT-CuNP was characterized by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy and X-ray diffraction. The stability of the coating was determined by the amount of Cu+ ions released into the surrounding using AAS. The microbial adhesion on the surface of Ti, TiO2-NTs and NT-CuNP coupons were evaluated by sea water exposure studies using total viable count method and also characterized by FE-SEM for any morphological changes. The NT-CuNP coupons show a 60% reduction in microbial adhesion when compared to control Ti coupons. 相似文献