Thermal mixing of two miscible fluids in a T-shaped microchannel     

Xu B  Wong TN  Nguyen NT  Che Z  Chai JC 《Biomicrofluidics》2010,4(4):44102

In this paper, thermal mixing characteristics of two miscible fluids in a T-shaped microchannel are investigated theoretically, experimentally, and numerically. Thermal mixing processes in a T-shaped microchannel are divided into two zones, consisting of a T-junction and a mixing channel. An analytical two-dimensional model was first built to describe the heat transfer processes in the mixing channel. In the experiments, de-ionized water was employed as the working fluid. Laser induced fluorescence method was used to measure the fluid temperature field in the microchannel. Different combinations of flow rate ratios were studied to investigate the thermal mixing characteristics in the microchannel. At the T-junction, thermal diffusion is found to be dominant in this area due to the striation in the temperature contours. In the mixing channel, heat transfer processes are found to be controlled by thermal diffusion and convection. Measured temperature profiles at the T-junction and mixing channel are compared with analytical model and numerical simulation, respectively.  相似文献   

Hong Kong Library Association Mentoring Program: Experience,Challenges and Opportunities     

Leo F. H. Ma  Maggie Mei Ki Wong 《International Information and Library Review》2020,52(2):170-175

Abstract

The Hong Kong Library Association (HKLA) has been the core organization serving the library and information science (LIS) community in Hong Kong since its establishment 62?years ago. It organizes activities and events continually to enrich professional knowledge of LIS professionals in Hong Kong. It has been observed that the number of student members has risen constantly in recent few years. In view of the pressing demand for better support to student members, the HKLA launched the Mentoring Program in 2013 to enhance informal communication between student members and other members of the Association. The Mentoring Program received an overall positive feedback from the local LIS community and made a positive impact to participants, especially mentees. Apart from the successful experience of this program, there are issues that can be improved in sustaining this program in long term. This paper summarizes the experience of implementing the Mentoring Program in the first two years and identifies the challenges and opportunities ahead. The finding indicates that the Mentoring Program was a well-received professional development program for the student members of the Association. However, this program can be further enhanced in terms of mentor solicitation, mentor-mentee eligibility, mentor-mentee relationship, knowledge-based interaction, and program sustainability. The Program Committee may consider collaborating with other LIS agencies to solicit more potential mentors. In view of the population of the potential mentors, it makes very good sense for the past mentees to serve as peer-to-peer partners for non-degree student members. More incentive should be devised to encourage the mentoring pairs in joining library events in addition to the activities related to the Mentoring Program. To facilitate communication and experience sharing among program participants and HKLA members, it is desirable to set up an online discussion platform to address the increasing demand for more opportunities on this. Lastly, it is vital to improve communication among the Program Committee, HKLA Council members and HKLA members. Besides reviewing the operation and management of the Mentoring Program, the Program Committee should also study the feasibility of sustaining this program in the long run. This paper can be served as an empirical study on the implementation of library and information science mentoring programs in one of the major cities in Asian region. The results of the study can be referenced by the LIS community not only locally but also internationally.  相似文献   

Concluding comments on the special series on the place of IQ in defining learning disabilities     

B Y Wong 《Journal of learning disabilities》1989,22(8):519-520

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对小学生实心球掷远教学的探索     

孙文津  翁金杭 《体育科学》1996,(4)

在教师的主导作用下,对实验班采用一系列行之有效的教学手段,有效地提高了小学生实心球掷远的成绩,培养学生对体育的兴趣和爱好。  相似文献   

对小学生实心球掷远教学的探索     

孙文津  翁金杭 《体育科研》1996,(4)

在教师的主导作用下,对实验班采用一系列行之有效的教学手段,有效地提高了小学生实心球掷远的成绩,培养学生对体育的兴趣和爱好。  相似文献   

Improving Environmental Conditions in the Tomb of Tutankhamen     

Lori Wong  Vincent Beltran  Chen Yang  Shin Maekawa  Sara Lardinois  Hany Hussein 《文物保护研究》2018,63(5):307-315

ABSTRACT

The tomb of Tutankhamen in the Valley of the Kings, Egypt, one of the major attractions of the World Heritage Site of Ancient Thebes and its Necropolis on the West Bank of modern day Luxor, is today a destination for mass tourism. Visitors to the tomb increase relative humidity, elevate carbon dioxide levels, and encourage natural ventilation which facilitates entry of dust into the tomb. These conditions negatively impact the wall paintings and remaining artifacts in the tomb and create an uncomfortable environment for visitors. The deposition of dust inside the tomb collects on uneven wall painting surfaces, obscures their legibility and necessitates cycles of cleaning, which in turn leads to further damage. Developing environmental management strategies in the tomb to counter the effects of visitors and mitigate dust entry is an important component of the collaborative project between the Getty Conservation Institute (GCI) and Egypt’s Ministry of Antiquities (MoA) to conserve the tomb. These included implementation of a filtered-air supply and exhaust ventilation system to stabilize the interior microclimate and reduce dust in order to improve visitor comfort and contribute to the long-term preservation of the tomb.  相似文献   

A Neurotic Extrovert Who is Open to New Experiences? Understanding How Personality Traits May Impact the Commenting Behaviors of Online News Readers     

Renee Barnes  Dough Mahar  Ides Wong  Karina Rune 《广播与电子媒介杂志》2017,61(3):557-573

This article develops a theoretical context for the influence of personality traits on commenting behaviors on online news Web sites. Drawing on the literature of personality, and online behaviors, we examine how personality traits may influence which individuals make contributions on news Web sites. Additionally the article focuses on how the commenting “landscape,” in particular moderation policies and user interfaces, may impact those who contribute.  相似文献   

Self-generated analogies as a tool for constructing and evaluating explanations of scientific phenomena     

E. David Wong 《科学教学研究杂志》1993,30(4):367-380

How can students be taught to develop explanations for scientific phenomena on their own when their background knowledge is incomplete or poorly organized? Evidence from historical accounts of scientific discovery suggest that self-generated analogies—analogies produced by the learners themselves—are a tool by which individuals can generate, evaluate, and modify their own explanations. The central research questions for this study were: Can students use a series of self-generated analogies to bring about change in their understanding of a given scientific phenomenon, and what is the nature of the change in understanding? Participants were asked to create, apply, and modify their own analogies—as opposed to applying a specific analogy provided by an outsider—as a heuristic for constructing, evaluating, and modifying their own explanations for a given scientific phenomena. Nontrivial changes in explanation facilitated by the use of generative analogies were observed. Changes in understanding ranged from the emergence of new explanations to the raising of important questions about the nature of the phenomenon.  相似文献   

How far should we go? A controversial issue in mural conservation in Hong Kong     

Eddy Leung  Jimmy Wong  Dominic Kan 《文物保护研究》2016,61(3):300-301

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The behavioral intentions of Hong Kong primary teachers in adopting educational technology     

Gary K. W. Wong 《Educational technology research and development : ETR & D》2016,64(2):313-338

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