Determining the informational,navigational, and transactional intent of Web queries

In this paper, we define and present a comprehensive classification of user intent for Web searching. The classification consists of three hierarchical levels of informational, navigational, and transactional intent. After deriving attributes of each, we then developed a software application that automatically classified queries using a Web search engine log of over a million and a half queries submitted by several hundred thousand users. Our findings show that more than 80% of Web queries are informational in nature, with about 10% each being navigational and transactional. In order to validate the accuracy of our algorithm, we manually coded 400 queries and compared the results from this manual classification to the results determined by the automated method. This comparison showed that the automatic classification has an accuracy of 74%. Of the remaining 25% of the queries, the user intent is vague or multi-faceted, pointing to the need for probabilistic classification. We discuss how search engines can use knowledge of user intent to provide more targeted and relevant results in Web searching.     

A framework for scientific knowledge generation

This paper investigates the notional development of various approaches claiming to add value in knowledge generation during the 20th century, with the aim to identify what it is that enhances productiveness in knowledge generation. Observing that knowledge generation is a complex phenomenon, an approach is used for the investigation that was developed specifically to study un-deterministic complex systems. A list of salient features for scientific knowledge generation is presented as a result. In addition to these features, various problem types are identified from literature. These two are then integrated to provide a proposed framework for scientific knowledge generation, which is trans-disciplinary and useful for scientific problem-solving in a pluralist reality. A case study illustrates the implementation of this framework.     

Attachment style and loneliness in adolescence

Possible associations between parent-child interactions and adolescent well-being have been explored from a number of theoretical perspectives. In the present study, attachment theory was used as a general theoretical framework to study these associations with attention being concentrated on one particular aspect of adolescent well-being, i.e., loneliness and attitudes towards being alone. Measures of adolescent attachment style (based on ratings of both normal family scenes and stressful separation situations) and a multidimensional measure of loneliness were administered to two samples of Belgian (Dutch-speaking) adolescents aged 15 to 18 (n=200 and n=357, respectively). Subjects were classified into four attachment groups: Secure, Dependent, Anxious-Ambivalent and Avoidant. Results indicated that Securely attached adolescents experienced lower levels of parent-related loneliness and this effect extended to loneliness in the relationships with peers. Aversion to being alone was experienced more strongly among Dependently attached adolescents. Finally, adolescents who evidenced Avoidant or Anxious-Ambivalent attachment felt more positive about being on their own. Implications of these findings for attachment theory are discussed and problems associated with the four-category model of attachment as used in the present study are outlined.     

Contours of the emergent knowledge society: Theoretical debate and implications for higher education research

The idea of the knowledge society is becoming increasingly dominant in various public and scholarly writings. Several governments have reacted by advocating a further expansion of higher education in order to provide a highly skilled workforce. This seems at odds with views regarding the underutilisation of skills of employed graduates. This paper sketches some major characteristics of the emergent knowledge society from sociological, epistemological and economic viewpoints. Next, it discusses current research on the incidence of overeducation. It is pointed out that measures on overeducation are inaccurate and do not take into account changes in the emergent knowledge societies. The paper concludes with implications for future research on the nature and change of knowledge-based occupations.     

我国独立R&D机构的管理现状和发展趋势--对独立R＆D机构研究与发展管理初步研究

二十年来改革开放和社会主义市场经济建设对我国研究与发展(R＆D)管理产生了重大影响,使R＆D管理发生了深刻变化.本文将讨论我国R＆D管理的状况,并对一个综合研究设计院(BSRI)进行个案研究,以确定R＆D管理面临的主要问题,最后,对今后我国R＆D管理发展趋势进行了初步探讨.     

The Role of Executive Functions in Socioeconomic Attainment Gaps: Results From a Randomized Controlled Trial

The socioeconomic attainment gap in mathematics starts early and increases over time. This study aimed to examine why this gap exists. Four-year-olds from diverse backgrounds were randomly allocated to a brief intervention designed to improve executive functions (N = 87) or to an active control group (N = 88). The study was preregistered and followed CONSORT guidelines. Executive functions and mathematical skills were measured at baseline, 1 week, 3 months, 6 months, and 1 year posttraining. Executive functions mediated the relation between socioeconomic status and mathematical skills. Children improved over training, but this did not transfer to untrained executive functions or mathematics. Executive functions may explain socioeconomic attainment gaps, but cognitive training directly targeting executive functions is not an effective way to narrow this gap.     

Antecedents and consequents of student satisfaction in higher technical-vocational education: evidence from Brazil

International Journal for Educational and Vocational Guidance - This article proposes a model of antecedents and consequences of student satisfaction in Higher Technical-Vocational Education (HTVE)...     

Effect of hand paddles and parachute on backstroke coordination and stroke parameters

Hand paddles and parachutes have been used in order to overload swimmers, and consequently increase the propulsive force generation in swimming. However, their use may affect not only kinematical parameters (average speed, stroke length and stroke rate), but also time gaps between propulsive phases, assessed through the index of coordination (IdC). The objective of this study was to assess the effects of hand paddles and parachute use, isolated or combined, on kinematical parameters and coordination. Eleven swimmers (backstroke 50-m time: 29.16 ± 1.43 s) performed four 15-m trials in a randomised order at maximal intensity: (1) without implements (FREE), (2) with hand paddles (HPD), (3) with parachute (PCH) and (4) with hand paddles plus parachute (HPD+PCH). All trials were video-recorded (60 Hz) in order to assess average speed, stroke rate, stroke length, five stroke phases and index of coordination. When average swimming speed was compared to FREE, it was lower in PCH and HPD+PCH, and higher in HPD. Stroke rate decreased in all overloaded trials compared to FREE. The use of hand paddles and parachute increased and decreased stroke length, respectively. In addition, propulsive phase duration was increased when hand paddles were used, and time gaps shifted towards zero (no time gap), especially when hand paddles were combined with parachute. It is conceivable that the combined use of hand paddles and parachute, once allowing overloading both propulsive and resistive forces, provides a specific stimulus to improve muscle strength and propulsive continuity.