基于关联数据的电子政务信息资源语义组织研究

分析关联数据应用于电子政务信息资源语义组织的意义,利用关联数据构建电子政务信息资源语义"关联"组织层次模型,进而从设计思想、实现步骤等方面提出实施对策,最后对电子政务信息资源语义"关联"组织中的标识符唯一性问题、空白节点问题、数据融合问题进行探讨.     

Quality Assurance of Higher Education in Transition Countries: Accreditation -- Accountability and Assessment

One issue facing countries in transition concerns how to ensure quality for a broader and more diverse set of institutions. Quality assurance processes (i.e. accreditation, accountability and assessment) have particular relevance today as higher education undergoes dramatic changes in countries in transition, as the world becomes more internationalised, and as private higher education institutions increase in number and enrol increasing numbers of students. Three questions emerge. Do differences among transition countries relative to central control prior to independence explain the current set of quality assurance mechanisms? Has the growth of private higher education in transition countries affected how quality assurance is conceptualised? Have quality assurance mechanisms been affected by the opening of branch campuses in transition countries?     

Anfragebasierte Client-Indexierung in Client-Server-Informationssystemen

Zusammenfassung Eine zentrale Fragestellung in Client-Server-Informationssystemen ist die serverseitige Zuordnung von Clients zu den durch diese benutzten Daten. Insbesondere in Szenarien, welche das clientseitige Cachen von Daten beinhalten, k?nnen derartige Informationen genutzt werden, um den globalen Datenbestand konsistent zu halten. Bei ?nderungen der Daten auf dem Server kann auf diese Weise serverseitig festgestellt werden, welche Caches durch die Modifikation ungültig geworden sind. In einem darauf folgenden Schritt k?nnen dann diese Caches je nach eingesetzter Strategie invalidiert oder korrigiert werden. In dem vorliegenden Beitrag werden Verfahren diskutiert, welche Datenbankanfragen nutzen, um die serverseitige Zuordnung von Clients zu den von ihnen benutzten Daten vornehmen zu k?nnen.

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One issue in client/server information systems is the storage of the relationships between clients and data used by these clients. In particular in scenarios, that allow the caching of data on the client site, this information can be used in order to keep the “global database” consistent. Thus, if the data on the server become updated, it is possible to detect caches affected by the update. In a following step it is possible either to patch or to invalidate these caches. In this paper we discuss approaches that use posted queries in order to index the clients on the server site.

     

Towards the creative university: Five forms of creativity and beyond

The Creative University is susceptible to multiple interpretations which are moving in a fluid conceptual space. This conceptual openness can be adequately understood only as a set of discursive formations that reflect underlying societal changes. It is becoming a commonplace to suggest that creativity should no longer be seen as a matter of heroic individuals at work, for creativity is always a networked matter, but that reflection has to be widened to encompass a sense of underlying shifting societal forces, with the economy central stage and hence the emergence of the hybrid idea of the creative economy. Qua institution, the creative university sits uneasily between discourses of economicism and societal flourishing. The creative university, accordingly, has to be seen in this milieu, which is steering the university but which also is affording it new possibilities for creativity. Five levels of creativity are identified that serve as domains in which these forces and affordances coexist. One such level, university reflexive creativity, is singled out as the most significant of the five. The creative university, it follows, unfolds as sets of interactions between individuals, institutional structures and corporate agency. Even as the constraints multiply, so too ever‐wider possibilities for the creative university may be opening.     

Predicting Foreign Language Reading Achievement in Elementary School Students

This study examined whether factors affecting first language reading acquisition also affect English Foreign Language (EFL) reading acquisition. Hebrew (L1) and EFL reading related measures were administrated to 145 fourth graders from the north of Israel who were beginning their first year of English instruction. Results from a Linear Structural Equational Analysis (LISREL) showed that the Hebrew independent variable consisting of morphological and phonological awareness, orthographic ability, and word reading (accuracy and speed) predicted EFL knowledge of letter sounds and names, word attack and reading comprehension. In addition to the Hebrew independent variable, English word recognition (accuracy and speed) predicted English reading comprehension. These results support the Linguistic Coding Differences Hypothesis (LCDH), which argues for core linguistic abilities that influence first and subsequent language reading acquisition.     

Antioxidant power of phytochemicals from<Emphasis Type="Italic">Psidium guajava</Emphasis> leaf

Dried ground leaves ofPsidium guajava L. (guava) were extracted by water and aqueous ethyl alcohol 50% (1∶10) ratio, and the total phenolic content in the extracts was determined spectrophotometrically according to Folin-Ciocalteu's phenol method and calculated as gallic acid equivalent (GAE). Remarkably high total phenolic content 575.3±15.5 and 511.6±6.2 mg of GAE/g of dried weight material (for ethanol guava leaf extracts and water guava leaf extracts, respectively) were obtained. The antioxidant activity of lyophilized extracts was determined at ambient temperature by means of a 2,2-diphenyl-1-picrylhydryzyl (DPPH') colorimetry with detection scheme at 515 nm. The activity was evaluated by the decrease in absorbance as the result of DPPH' color change from purple to yellow. The higher the sample concentration used, the stronger was the free radical-scavenging effect. The results obtained showed that ascorbic acid was a substantially more powerful antioxidant than the extracts from guava leaf. On the other hand, the commercial guava leaf extracts and ethanol guava leaf extracts showed almost the same antioxidant power whereas water guava leaf extracts showed lower antioxidant activity. The parameter EC₅₀ and the time needed to reach the steady state to EC₅₀ concentration (T _{EC 50}) affected the antiradical capacity of the sample. The antioxidant efficiency (AE) has been shown to be a more adequate parameter for selecting antioxidants than the widely used EC₅₀. This study revealed that guava leaf extracts comprise effective potential source of natural antioxidants.     

教育制度:概念的厘定

虽然要对教育制度下一个准确的、为各方所认可的定义十分困难 ,但我们认为 ,一个完整准确的教育制度定义 ,至少应当包含以下几个基本的方面 :即 ,教育制度是教育活动的规则 ;教育制度是“社会的”制度 ;教育制度具有程度不同的权威性或强制性。在此基础上 ,我们可以将“教育制度”概念大致地界定为 :教育制度是用以调整个体行动者之间以及特定教育组织内部行动者之间关系的强制性或权威性的行为规则体系