This research examines the effect of overall neighborhood satisfac-tion, victimization, and social participation on perceived neighborhood safety. It systematically tests the relative importance of victimization, concern with neigh-borhood "environmental" quality, and social integration into the community in predicting fear of crime. Our research incorporates three aspects into a single model that predicts the level of fear of crime experienced by local community residents. Fear of crime is measured in terms of perceived risks in various circumstances in the neighborhood of residence. As such, a measure of fear of crime can be seen as a measure of perceived neighborhood safety. Results suggest that those who exhibit higher levels of satisfaction with the neighborhood environment tend to express higher perceived levels of neighborhood safety. Property victimization, not personal victimization, is found to have an impact on residents' perception of neighborhood safety. In contrast, social participation does not seem to be related to perceived neighborhood safety. The result implies that improving the quality of neighborhood environmental characteristics will increase residents' concern with the appearance of the neighborhood along with their concerns about the quality of people who live there, which in turn enhances higher perceived levels of neighborhood safety.
We have investigated the dielectric characteristics at microwave frequencies of perovskites with the formula (A1/2
1+·A1/2
3+)TiO3, (where A1+ represents an alkali metal from the lithium to potassium series and A3+ represents a member of the lanthanide series from lanthanum to lutetium). It was found for the first time that in the case of Li1+ substitution at the A1+ site, the larger the ionic radius of the element which substituted at the A3+ site, the higher the dielectric constant was and the greater the negative shift of the temperature coefficient of resonant frequency was. For the (1-x)(Li1/2
1+·Sm1/2
3+)TiO3-x(Na1/2
1+·Sm1/2
3+)TiO3 system at 3 GHz, high dielectric properties of εr=81, Q=2050 and τf=+17ppm/ °C were obtained when x=0.4.
The IT-MAIS and MUSS scores of the congenital CMV infection group and the GJB2 mutation group continued to increase for 4 years after implantation. The S-S method score in both groups gradually increased, although the scores for children with mental retardation were low.
We have investigated the microwave dielectric properties of the Li2O-Ln2O3-TiO2 system and the CaO-Li2O-Ln2O3-TiO2 system (Ln: Lanthanide), both of which have a perovskite structure. The relationship between the kind of lanthanide element and dielectric properties at microwave frequencies was confirmed. It was also found that the ionic radius of lanthanide ions has a strong influence on the dielectric properties. Excellent dielectric properties of εr=110, f·Q value=4500 GHz and high temperature stability for the resonant frequency at 3 GHz were obtained with a composition of CaO:SrO:Li2O:Sm2O3:TiO2=15.0:1.0:9.0:12.0:63.0 (molar ratio). Also, band-pass filters made of this material were examined. The filters were greatly miniaturized to the size of about 2×5×4 mm3 (0.04 cm3).
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