What installed mobile applications tell about their owners and how they affect users’ download behavior

The rapid growth in the mobile application market presents a significant challenge to find interesting and relevant applications for users. An experimental study was conducted through the use of a specifically designed mobile application, on users’ mobile phones. The goals were; first, to learn about the users’ personality and the applications they downloaded to their mobile phones, second to recommend applications to users via notifications through the use of experimental mobile application and learn about user behavior in mobile environment. The question of how the personality features of users affect their compliance to recommendations is explored in this study. It is found that conscientiousness is positively related with accepting recommended applications and being agreeable is related with the preference for the applications of editor’s choice. Furthermore, in this study, applications owned by the user and the composition of applications under categories and their relation with personality features are explored. It is shown that the number of user owned applications and their category differ according to gender and personality. Having similar applications and the number of applications owned under specific categories increase the probability of accepting recommended applications.     

Photo-Fenton-like treatment of BPA: Effect of UV light source and water matrix on toxicity and transformation products

UV-A (near-UV), UV-C (short-UV) and visible-light assisted Fenton-like treatment of Bisphenol A (BPA) was investigated in pure water and raw freshwater samples spiked with BPA. Treatment performances were evaluated in terms of BPA degradation, dissolved organic carbon (DOC) removal and H₂O₂ consumption rates. Complete BPA degradation accompanied with significant DOC removal was achieved for all studied processes. Increasing the initial solution pH only exhibited a negative effect on treatment efficiencies when bicarbonate alkalinity was used for pH adjustment, whereas the raw freshwater matrix and irradiation type also influenced oxidation rates appreciably. Acute toxicity analysis employing Vibrio fischeri revealed that the inhibitory effect of BPA decreased significantly during the course of Photo-Fenton-like treatment. Several transformation products could be identified via HPLC and GC–MS analyses including hydroxylated phenolic compounds (hydroquinone; 2-methoxy, 1-4-benzenediol; 4-isopropenylphenol; 4′-hydroxy-acetophenone; 1-(4-cyclohexylphenyl) ethanone; 4-isopropylenecatechol; 4-4′-dihydroxybenzophenone; 4-ethyl,1,3-benzenediol), as well as the ring opening products hexanoic acid methyl ester, fumaric, succinic and oxalic acids. A reaction pathway featuring hydroxylation, dimerization and ring opening steps is proposed.     

住宅市场消费需求的决定因素与供给结构

分析了上海市住宅市场消费需求结构的内涵与构成,及其决定住房消费需求的主要因素,指出改变衡量住房供给结构合理度的标准.     

Recontamination as a source of pathogens in processed foods

Food products that have been submitted to an adequate heat-treatment during processing are free of vegetative pathogens and, depending on the treatments, of sporeformers and are generally regarded as safe. Processed products such as paté, ice cream, infant formulae and others have nevertheless been responsible for food-borne illnesses. Thorough epidemiological investigations of several of these outbreaks have demonstrated that the presence of vegetative pathogens such as Salmonella spp. or Listeria monocytogenes in the consumed products was frequently due to post-process recontamination. The majority of studies on pathogens in foods are devoted to investigations on their presence in raw materials or on their growth and behaviour in the finished products. Reference to recontamination is, however, only made in relatively few publications and very little is published on the sources and routes of these pathogens into products after the final lethal processing step. The investigation of an outbreak, including epidemiological studies and typing of strains, is very useful to trace the origin and source of the hazard. Published data demonstrate that the presence of pathogens in the vicinity of unprotected product in processing lines represents a significant risk of recontamination. Microbiological Risk Assessment studies can be conducted as part of governmental activities determining appropriate protection levels for populations. Although recontamination has been identified as a relevant cause of food incidences, it is often not considered in such studies. This paper advocates that an effort should be made to develop our knowledge and information on recontamination further and start using it systematically in the exposure assessment part of Microbiological Risk Assessment studies.     

1983年个人剂量计照射量比对结果

本文给出核工业部组织的、有厂、矿、院、所和高等院校等19个单位参加的第二次个人剂量计照射量比对结果。参加本次比对的有热释光剂量计(TLD)、辐射光致荧光玻璃剂量计(RPL-D)和胶片剂量计(Film-D)三种类型,共72组、222个剂量计。比对所选取的辐射是有效能量为47keV 的重过滤 X 射线和~(226)Ra 的γ射线。选取的参考照射量值,对于 TLD 是62—66mR;对于 RPL-D 和 Film-D 是110—160mR。由三种剂量计测得的306个数据表明,实测值(X_1)与参考照射量(X)比值的平均值为1.06±0.23,中位值为1.03,落在0.74—1.38范围内的约占总数的85%。     

上海老人养老方式选择及住房需求

老年住房课题组最近完成了“上海老人养老方式选择及住房需求”的专题调研。采取抽样入户调查、发函调查与开调查会相结合的方法 ,接受调查的老人达 2 90 0人 ,样本量达到 2 .33‰ ,获得了反映老人们基本情况的原始数据 2 6 4 0 0 0多个 ,掌握了养老方式选择和住房需求等第一手资料 ,提出了改善养老住房条件的建议。1　基本数据( 1 )姓别与年龄结构 :男性占 4 4.4 % ,女性占 55.6 % ;6 0～ 6 9岁占 4 2 .6 % ,70～ 79岁占 4 4.1 % ,80岁以上占 1 3.3%。( 2 )婚姻与健康状况 :配偶健在占 6 7.6 % ,丧偶占 2 9.8% ,离婚占 1 .6 % ,从未结婚占 …     

Diagnostic utility of the polymerase chain reaction in 2 cases of suspected Whipple disease

We describe 2 patients with a diagnosis of Whipple disease in whom the usual antibiotic therapy failed. A polymerase chain reaction-based test was used to identify the recently described Whipple bacillus, Tropheryma whippelii. In one case, the diagnosis was confirmed, whereas in the second case, which had been histologically diagnosed as Whipple disease of the brain, the process was identified as a monocyte-derived histiocytosis. In conclusion, Whipple disease can be distinguished from other diseases with similar histological features with the use of a polymerase chain reaction-based test.