Evaluation of the heat transfer performance of helical coils of non-circular tubes     

Jundika C. Kurnia  Agus P. Sasmito  Arun S. Mujumdar 《浙江大学学报(A卷英文版)》2011,12(1):63-70

This study addresses heat transfer performance of various configurations of coiled non-circular tubes, e.g., in-plane spiral ducts, helical spiral ducts, and conical spiral ducts. The laminar flow of a Newtonian fluid in helical coils made of square cross section tubes is simulated using the computational fluid dynamic approach. The effects of tube Reynolds number, fluid Prandtl number, coil diameter, etc., are quantified and discussed. Both constant wall temperature and constant heat flux conditions are simulated. The effect of in-plane coil versus a cylindrical design of constant coil, as well as a conical coil design is discussed. Results are compared with those for a straight square tube of the same length as that used to form the coils. Advantages and limitations of using coiled tubes are discussed in light of the numerical results.  相似文献   

Challenges in studying the psychological effects of Palestinian children's exposure to political violence and their coping with this traumatic experience     

Haj-Yahia MM 《Child abuse & neglect》2007,31(7):691-697

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Pathogenicity of bacterium, Xenorhabdus nematophila isolated from entomopathogenic nematode （Steinernema carpocapsae） and its secretion against Galleria mellonella larvae     

Mahar AN  Munir M  Elawad S  Gowen SR  Hague NG 《Journal of Zhejiang University. Science. B》2005,6(6):457-463

INTRODUCTION Entomopathogenic nematodes of the generaSteinernema and Heterorhabditis have been used tocontrol a wide range of agriculturally important insectpests (Kaya and Gaugler, 1993). The mechanism bywhich these nematodes are able to infect and repro-duce in the insect host involves a mutual relationshipbetween the nematode and the symbiotic bacteria,Xenorhabdus spp. and Photorhabdus spp. (Akhurstand Dunphy, 1993; Forst and Nealson, 1996). Poinarand Thomas (1966) established tha…  相似文献   

Pakistani diaspora in Britain: intersections of multi-locationality and girls’ education     

Saeeda Shah  Muhammad Iqbal 《British Journal of Sociology of Education》2011,32(5):763-783

The South Asian diaspora and its impact on the lives of dispersed communities is a complex phenomenon finding expression in a range of issues and debates. However, the nature and scale of the challenges and issues vary in each case and context, and even over generations. These issues become more sensitive and poignant when underpinned by cultural and belief systems. This paper debates the impact of dominant discourses and values on schooling choices and the related concerns to explore issues linked to girls’ education among Pakistani diaspora in England, drawing on relevant literature and the evidence from a recent study of single-sex schooling. It argues that multiple emotional, social, cultural, historical, political, economic and other affiliations influence the patterns of behaviour and the terms of civic engagement in the adopted country leading to a struggle over meanings and competing positions over values and practices that are fluid and dynamic.  相似文献   

Teacher Expectations and Principal Behavior: Responding to Teacher Acquiescence     

Muhammad A. Khalifa 《The Urban Review》2011,43(5):702-727

This study investigates the relationship between low teacher expectations and principal behavior. The researcher investigated why some teachers seem to acquiesce, or make deals and ‘give in,’ to student disengagement. After a two-year ethnographic study in an alternative school for at-risk Black students, the author found that White teachers are more likely than Black teachers to engage in deal-making with students, whereby Black students were allowed to academically and socially disengage. However, another finding of this research was that the school leader—armed with a vision to combat racism and advocate for children—imposed on his staff a policy that required them to socially and academically engage these Black, at-risk students. Implications for school leaders and teachers of at-risk, alternative school children are presented.  相似文献   

Choice of Higher Education Institutions: Perspectives of Students from Different Provinces in China     

Muhammad Azeem Ashraf  Shuiyun Liu  Hafiza Iqra Ismat  Samson Maekele Tsegay 《Frontiers of Education in China》2017,12(3):414-435

This study aims to find factors linked to university choice in China that work for or against students’ access to higher education. China has undertaken many reforms in the past two decades and has rapidly expanded its higher education system. The transition from a sequential to a parallel mechanism for students to select universities is a significant change in the admission process. The expansion of higher education increased the number of high school graduates who dream of going to top-ranked Chinese universities. With this dream, students start preparing themselves for higher education during basic education. Despite the increase in top-ranked universities, the issues such as school education, familial expectations, choices of city and of major have a significant impact on students’ choice of university.  相似文献   

The American influence in Indonesian teacher training, 1956–1964     

Agus Suwignyo 《History of education》2017,46(5):653-673

This paper examines United States–Indonesian cooperation in the training of Indonesian teachers during the early decades of the Cold War. Indonesia badly needed teachers but the government’s efforts to train new teachers were hampered by the tremendous lack of teachers who could train new teachers. The aid provided by the United States enabled the Indonesian government to send its prospective teachers to study in the United States and to have American educationists help develop teachers’ colleges in Indonesia. How far did the decolonisation of teacher training and the making of a new education standard in postcolonial Indonesia reflect the conflicting ideological undertones and the US strategy of the Cold War? This paper argues that the US–Indonesian cooperation in teacher training marked a significant stage in the decolonisation of Indonesia. Yet, it also fostered the US cultural strategy of the Cold War in Southeast Asia.  相似文献   

Anatomy "steeplechase" online: necessity sometimes is the catalyst for innovation     

Inuwa IM  Al Rawahy M  Taranikanti V  Habbal O 《Anatomical sciences education》2011,4(2):115-118

In most medical schools, summative practical examination in Anatomy usually takes the format of a “steeplechase” (“spotters” or “bell ringers”) conducted in the gross anatomy laboratory using cadaveric material and prosected specimens. Recently, we have started to administer similar examinations online using the quiz facility in WebCT? and Moodle?. This article chronicles how we conceived and developed this method within the peculiar nature of our medical school setting. Over a five year period, practical summative examinations were organized as “steeplechase” online. The online examinations were administered using WebCT? and later Moodle? learning management software. Assessment “objects” were created from the materials available for anatomy teaching. These were digital images of cadaveric materials, radiological, and prosected specimens. In addition, short video clips of 30 seconds duration demonstrating muscle action were produced. These objects were optimized for online viewing and then uploaded onto the learning management software. A bank of questions (multiple choice or short answer type) was then created and linked to the assessment objects. These were used in place of the steeplechase in the computer laboratory. This method serves a crucial purpose in places like ours where continuous availability of human cadavers is impossible. Although time consuming initially, once questions are setup online, future retrieval, and administration becomes convenient especially where there are large batches of students. In addition, the online environment offers distinct advantages with regards to image quality, psychometric analysis of the examination and reduction of staff preparation time compared to traditional “steeplechase.” Anat Sci Educ 4: 115–118, 2011. © 2010 American Association of Anatomists.  相似文献   

Evaluation of Neuroanatomy Web Resources for Undergraduate Education: Educators’ and Students’ Perspectives     

Muhammad Asim Javaid  Harriët Schellekens  John F. Cryan  André Toulouse 《Anatomical sciences education》2020,13(2):237-249

Despite the development of novel teaching strategies and the abundance of adjunct teaching web resources, students and early career physicians have continuously reported difficulties in learning and clinically applying neuroanatomy. Differences in instructional design of these resources, the lack of assessment of their capacity to meet intended educational goals, and a poor understanding of the user’s perspective may have hindered their success in increasing understanding and retention of neuroanatomical knowledge. To decipher the limitations of existing web resources, an online search for neuroanatomy web resources was performed and distilled through a strict filtration rubric. A selection of resources were analyzed by a panel of educators and rated using Likert scales, focusing on the identification of features influencing their usefulness in learning the anatomy of the spinal pathways. The top three ranked web resources were subsequently evaluated by a panel of medical and neuroscience students to assess how specific features aided in their learning of the subject. This detailed analysis has identified features of neuroanatomy web resources that are valued by both educators and users with regard to instructional design. One resource was rated highest by end users and educators on a series of Likert scale questions in terms of clarity of explanation, step-wise teaching design, summarization of information, control of instructional-pace, integration with neurophysiology, neuroradiology and clinical correlates, deployment of a wide array of pedagogical tools, and factors for visualizing neuroanatomical inter-relationships. These results have provided a novel user perspective on the influence of specific elements of neuroanatomy web resources to improve instructional design and enhance learner performance.  相似文献   

Beyond the anti-American sentiment     

Agus Muhammad 《Inter-Asia Cultural Studies》2013,14(1):135-137

Abstract

This paper juxtaposes the predicaments of two popular stars in Asia whose mobility in their respective cultural fields became challenged by political sentiments in 2004. Chang Hui‐Mei (A‐Mei), the aboriginal pop diva from Taiwan, became the target of a protest organized by Chinese ‘patriots’ before a performance in Hangzhou. The event set off a series of public debates involving high‐level Taiwanese politicians, fans, and members of the public that recalled a similar controversy in 2000 when A‐Mei was banned in China after singing at the inauguration of President Chen Shui‐Bian. Some months later, Korean Wave star Song Seung‐Heon became the subject of a draft‐dodging investigation while he was shooting a highly anticipated TV drama, Sad Love Story. Support from different configurations of overseas fans poured in and remained strong even after he gave up the project and began his mandatory military service. Using these two parallel cases to reveal how politics and entertainment interact in Asia independent of stars’ volition, this paper investigates the affective investment and communication strategies of A‐Mei’s cross‐strait fans and Song’s Chinese‐Asian fans during these emotion‐laden circumstances. The inter‐referential approach of this paper not only reveals the importance of considering patriotism as a latent (rather than exceptional) political and popular force in trans‐Asian popular culture, but also reconfigures the relationships between the public, popular, and political in inter‐Asia cultural traffic.  相似文献