我国农业网站建设研究综述

农业网站的迅猛发展日益受人关注,文章采用文献资料法,对农业网站建设现状、问题和对策几个方面作了简要述评,并对相关研究提出几点建议。     

利用Index Server对象实现站内搜索课程的教学思考

现在，人们已经意识站内搜索的重要性。运用传统的实现方法，出错率较高，运行效率非常低，兼容性也较差。利用Index Server对象实现站内搜索可弥补传统方法的不足。     

The present status of library services to children and young adults in Japanese public libraries and their future

ABSTRACT

Both Children’s services and Young Adult (YA) services have been recognized as essential in Japanese public libraries. This article reports on the present status of Children’s services and YA services in Japanese public libraries, based on the results of several investigations. These studies show that children’s services in Japanese public libraries already are generally popular. On the other hand, this article indicates that YA services in Japanese public libraries are gradually improving, due to the national recognition of the importance of YA library services. Examples of good practices in Children’s and YA services in Japanese public libraries are described and analyzed to identify the common themes that flow through these innovations. This article concludes with observations about the future involving library services for children and YAs, from the viewpoints of face-to-face traditional services and indirect services through their official websites.     

Role of technology attraction and parasocial interaction in social shopping websites

Attraction is an essential factor in interactions between individuals. Some existing studies have examined multiple dimensions of attraction including social, physical, and task attraction. However, the mechanism behind these three attraction dimensions and parasocial interaction in social shopping websites has not been well examined. This study adopts technology attraction theory and parasocial interaction theory to analyze how three types of technology attraction affect parasocial interaction, which consequently influences users’ social commerce intention. This study conducted a survey to analyze the proposed empirical model and analyzed data from 248 social shopping website users. The results indicate that social attraction and task attraction positively and directly affect the users’ parasocial interaction. In contrast, physical attraction indirectly influences users’ parasocial interaction via social attraction and task attraction, respectively. Parasocial interaction consequently influences users’ social commerce intention. Discussion, limitations, and implications of the study are presented.     

无模型自适应控制与PI控制在主动列队管理中的应用比较研究

在网络拥塞算法研究中，IP层实现的主动队列管理已经成为一个研究的热点。将无模型自适应方法应用到主动列队管理中，并进行了与PI控制的比较研究，仿真结果说明，无模型自适应控制比PI控制更快更稳定地达到平衡点，说明无模型自适应控制在网络拥塞控制具有较好的适应性。     

英语习语的翻译技巧

英语习语在英译汉中占有非常重要的位置。它包括成语、谚语、俚语、俗语、歇后语等．英语习语的翻译有三种方法:直译法、套用法、意译法。     

苯的自由电子模型能级修正的讨论

讨论了苯的自由电子模型能量至二级修正，能级分裂只发生在特定能级上。     

Antioxidant activity of ethanol extract of rhizome ofPicrorhiza kurroa on indomethacin induced gastric ulcer during healing

Oral administration of ethanol extract of the rhizome ofPirorhiza kurroa at a dose of 20mg/kg body weight, for 10 consecutive days, was found to enhance the rate of healing on Indomethacin-induced gastric ulcer in rats, compared to the ulcerated group without treatment. The level of peroxidised lipid, in terms of thiobarbituric acid reactive species (TBARS), in gastric tissue, was increased in ulcerated rats which was restored to near normalcy on treatment with ethanol extract. The specific activity ofin vivo antioxidant enzymes, viz SOD and catalase and total tissue sulfhydryl (thiol) group, which were markedly decreased in ulcerated group, were found to be significantly elevated (p<0.05), on treatment with the above extract, at the specified dose, compared to the indomethacin—induced ulcerated group without any supporting treatment. The present study thus suggests that the ethanol extract of rhizome ofPicrorhiza kurroa, at the dose of 20mg/kg body weight, accelerated the healing of stomach wall of indomethacin induced gastric ulcerated rats by anin vivo free radical scavenging action.     

Effect of<Emphasis Type="Italic">Vitex negundo</Emphasis> leaf extract on the free radicals scavengers in complete Freund's adjuvant induced arthritic rats

The effect of the oral administration ofVitex negundo leaf extract on the levels of enzymic and non-enzymic antioxidants were studied in the adjuvant induced arthritic (AIA) rats The levels of antioxidant enzymes such as SOD, CAT, GPx, G6PD, GSH and Vit-C were estimated in various groups of the experimental rats. It was observed that the antioxidant enzyme levels in the AIA were significantly low when compared to normal rats. A significant decrease in enzymic antioxidant—SOD, CAT, GPx, G6PD and non-enzymic antioxidant—GSH, Vit-C were observed in the liver of AIA rats compared to the normal rats. These results suggest that the leaf extract ofVitex negundo possesses antioxidant activity.     

Cerebrospinal fluid free sialic acid and aspartate transaminase levels in meningitis

Background  Sialic acid (SA) is a nine carbon sugar derived from mannosamine and pyruvate. High levels of sialic acid and aspartate transaminase (AST) levels in cerebrospinal fluid have been described in pyogenic meningitis (PM) compared to tubercular meningitis (TBM). Objectives  To evaluate the levels of CSF free SA in PM and TBM and to assess the correlation between CSF free SA and CSF glucose or total protein levels. Patients and Methods  A total of 122 subjects were studied and divided into children and adults. Further, these have been subdivided into controls, PM and TBM. CSF free SA was estimated by thiobarbituric acid assay of Warren and AST by Reitmann and Frankel method. Results  CSF free SA and AST levels in children and adults were significantly high in PM (p<0.001) as compared to TBM and controls. Conclusion  A very high CSF free SA and AST were found to be characteristic of PM, making them useful parameters to differentiate PM from TBM.