Diversity in the Information Seeking Behaviour of the Virtual Scholar: Institutional Comparisons     

David Nicholas  Director of CIBER  Professor at  Director of the School of Library  Paul Huntington  Senior Researcher  a founder member of CIBER  SLAIS  University College London  WCE  BT  UK  Hamid R. Jamali  a researcher in CIBER  SLAIS  University College London  WCE  BT  UK 《The Journal of Academic Librarianship》2007,33(6):629-638

The logs of four universities using the OhioLINK journal system were evaluated for a period of fifteen months using deep log analysis methods in order to compare and contrast the information seeking behaviour of their users. Large differences were found, especially between the research and teaching universities. Methodological problems associated with making the comparisons are discussed in some detail especially in terms of defining online sessions.  相似文献   

The effects of exercise in hypoxic and normoxic conditions on endothelin-1 and arterial compliance     

Giles LV  Warburton DE  Esch BT  Fedoruk MN  Rupert JL  Taunton JE 《Journal of sports sciences》2012,30(3):261-267

The purpose of this study was to determine the effects of short-term normoxic and hypoxic exercise on plasma endothelin-1 and nitric oxide levels, and the relationship of arterial compliance and pulmonary artery pressure to endothelin-1. Seven endurance-trained males completed two incremental and two steady-state exercise tests performed at ventilatory threshold in normoxia and hypoxia (fraction of inspired oxygen = 0.14). Plasma endothelin-1was measured throughout steady-state tests. Arterial compliance using applanation tonometry, plasma nitric oxide and pulmonary artery pressure using Doppler echocardiography were measured before and after exercise. Small arterial compliance and pulmonary artery pressure significantly increased following exercise. There were no main effects of condition or time for plasma endothelin-1and nitric oxide levels. There were no significant relationships between plasma endothelin-1 and arterial compliance or pulmonary artery pressure. In conclusion, mechanisms other than the endothelial system may play a role in the exercise-induced changes in small artery compliance in this study population. Moderate hypoxia and a 30-minute steady-state exercise have limited effects on plasma endothelin-1 in endurance-trained males.  相似文献   

English and French pedagogical cultures: convergence and divergence in Cameroonian primary school teachers' discourse     

Edith Esch 《比较教育学》2012,48(3):303-321

This article approaches the phenomenon of the continuing influence of French and English pedagogical cultures in Africa relying on post-modern notions of time and space. It reports on a project carried out in Cameroon where both cultures are in contact and where the teachers from two primary schools were observed and interviewed over a period of five weeks each. The data collected is interpreted as revealing divergent professional contexts within which the teachers' discourse about their professional roles and the place of languages rests on assumptions reminiscent of the pedagogical values of the former colonisers. However, teachers from both schools are strongly in favour of maintaining French and English as medium of education. The significance of the phenomena reported is critically discussed to highlight new discontinuities in present day Cameroon which transform these apparently sharp distinctions: the disjunction between the notion of place and the medium of education, the fast evolving meanings of ‘French’ ‘English’ and ‘bilingualism’ in the twenty first century and the fact that schools are multilingual sites. The paper concludes that the differences in the way teachers construct their professional identities has prevented them from developing a joint pedagogical repertoire and that lack of mutual understanding might be a reason for the reported mere ‘cohabitation’ provided by bilingual schools.  相似文献   

Conceptualizing a basis for understanding: What differences do differences make?     

Judith L. Green  Gregory J. Kelly  Maria Lucia Castmheira  Julie Esch  Carolyn Frank  Marli Hodel 《教育心理学家》2013,48(3-4):227-234

The purpose of our commentary is to offer ways of understanding the differences in theoretical positions and of exploring what difference the differences make. To conceptualize a basis for understanding the theoretical transformation currently taking place in the field of educational psychology, we bring two constructs from the philosophy of science to bear. We suggest that one way to understand the differences is to consider the expressive potential of the research programs. In so doing, we suggest that the research programs be seen as intellectual ecologies created by members within these traditions. We argue that to understand the emic point of view of a tradition, one must become initiated into the discourse within that community and understand the historical development of the ideas within that intellectual ecology.  相似文献   

When ‘we wish they knew’ meets ‘I want to know’     

P. Sean Smith  Jennifer A. Torsiglieri  R. Keith Esch  Joan D. Pasley 《International Journal of Science Education》2013,35(13):1830-1845

ABSTRACT

The tension between mandated curricula and students’ interests is evident throughout the history of science education. Societal expectations for student learning often lead to standards and curricula that leave little room for students to explore their own individual interests. Occasionally, however, an event can capture the interest of so many students that teachers feel compelled to respond. The Ebola outbreak of 2014 was such an event. This article discusses findings from a study of teacher decision-making; specifically, it explores how high school science teachers in the U.S. decided whether and how they should address Ebola during the 2014–2015 school year, when the Ebola outbreak in West Africa was at its peak. Approximately 2500 teachers of science responded to an online questionnaire that addressed their Ebola-specific instruction. In comparing the decisions of those who taught about Ebola and those who did not, the study found that teachers weighed various factors, in particular student interest but also curriculum standards, time, and availability of resources for teaching about Ebola. The article concludes with implications for future urgent health-related issues.  相似文献   

Slow growth of the Rayleigh-Plateau instability in aqueous two phase systems     

Geschiere SD  Ziemecka I  van Steijn V  Koper GJ  Esch JH  Kreutzer MT 《Biomicrofluidics》2012,6(2):22007-2200711

This paper studies the Rayleigh-Plateau instability for co-flowing immiscible aqueous polymer solutions in a microfluidic channel. Careful vibration-free experiments with controlled actuation of the flow allowed direct measurement of the growth rate of this instability. Experiments for the well-known aqueous two phase system (ATPS, or aqueous biphasic systems) of dextran and polyethylene glycol solutions exhibited a growth rate of 1 s⁻¹, which was more than an order of magnitude slower than an analogous experiment with two immiscible Newtonian fluids with viscosities and interfacial tension that closely matched the ATPS experiment. Viscoelastic effects and adhesion to the walls were ruled out as explanations for the observed behavior. The results are remarkable because all current theory suggests that such dilute polymer solutions should break up faster, not slower, than the analogous Newtonian case. Microfluidic uses of aqueous two phase systems include separation of labile biomolecules but have hitherto be limited because of the difficulty in making droplets. The results of this work teach how to design devices for biological microfluidic ATPS platforms.  相似文献