A new technique for detecting patterns of term usage in text corpora     

John Olney  Van Lam  Bradley Yearwood 《Information processing & management》1976,12(4):235-250

Term occurrence A is included in term occurrence B if A is a substring of B. By making a single pass through a slightly non-standard KWIC index, every recurring phrase can be detected, and its inclusion relationships with other phrases and/or single words can be computed. Results obtained by processing a corpus of 2675 medical titles indicate that several properties definable in terms of inclusion relationships among terms have significance for vocabulary control. Preliminary results from a corpus of more than 62,000 medical titles have confirmed this finding.  相似文献   

Using visits to interactive science and technology centers,museums, aquaria,and zoos to promote learning in science     

Dr. Leonie Rennie  Terence McClafferty 《Journal of Science Teacher Education》1995,6(4):175-185

This article received the “Implications of Research for Educational Practice” award at the 1995 meeting of the Association for the Education of Teachers in Science. The award is made possible by Carolina Biological Supply. An adaptation of this article, entitled “Don’t Compare, Complement: Making Best Use of Science Centres and Museums,” was published in the 1995 Set: Research Information for Teachers, Number 1, Item 1, by the New Zealand and Australian Councils for Education Research.  相似文献   

Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading     

Xing-fei Yuan  Shao-hua Xia  L. Lam  S. T. Smith 《浙江大学学报(A卷英文版)》2008,9(1):38-49

Fibre-reinforced polymer （FRP） composites were widely utilized in civil engineering structures as the retrofit of reinforced concrete （RC） columns. To design FRP jackets safely and economically, the behaviour of such columns should be predicted first. This paper is concerned with the analysis and behaviour of FRP-confined RC circular and rectangular short columns subjected to eccentric loading. A simple design-oriented stress-strain model for FRP-confined concrete in a section analysis was first proposed. The accuracy was then proved by two test data. Following that, a parametric study including amount of FRP confinement, FRP strain capacity, unconfined concrete strength and shape of column section is provided. Some conclusions were obtained at the end of the paper. The work here will provide a comprehensive understanding of the behaviour of FRP-confined concrete columns. The simplicity of the model also enables a simple equivalent stress block to be developed for direct use in practical design.  相似文献   

Scaling up of Continual Professional Development for Mathematics Problem Solving in Singapore Schools     

Leong  Yew Hoong  Toh  Tin Lam  Tay  Eng Guan  Quek  Khiok Seng  Toh  Pee Choon  Jaguthsing  Dindyal 《International Journal of Science and Mathematics Education》2021,19(6):1291-1310

The more ambitious an educational innovation, the greater the challenge in scaling up. In this paper, we focus on the scaling up of an ambitious pedagogical practice—mathematics problem solving as a regular feature in the classroom. We adopt a long-term approach to continual professional development (CPD) that began with intensive work with one school before we broadened the programme to four other schools which span the spectrum of schools in Singapore. To evaluate this overall design, we examine the current state of each school’s capacity in sustaining mathematics problem-solving instruction. In particular, we study and report findings on these areas: the readiness of teachers, the instructional materials and supporting structures. Based on the findings, we reflect on our CPD strategies and our theory of action which guided the CPD programme.

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Delay-dependent stochastic stability and H_∞ analysis for time-delay systems with Markovian jumping parameters     

Yong-Yan Cao  James Lam  Lisheng Hu 《Journal of The Franklin Institute》2003,340(6-7):423-434

This paper studies the problem of the stochastic stability and H_∞ disturbance attenuation for linear continuous-time time-delay systems that possess randomly Markovian jumping parameters. A delay-dependent sufficient condition on the stochastic stability with given H_∞ performance is proposed using the stochastic Lyapunov–Krasovskii stability theory. The conditions are formulated as a set of coupled linear matrix inequalities.  相似文献   

African-American women who use crack cocaine: a comparison of mothers who live with and have been separated from their children     

Lam WK  Wechsberg W  Zule W 《Child abuse & neglect》2004,28(11):1229-1247

OBJECTIVE: This study examined factors that influenced caregiver status for African-American mothers who use crack cocaine but are not receiving drug treatment and participated in an HIV prevention study in North Carolina. METHOD: Caregiver mothers who were living with at least one of their children at intake (n = 257) were compared with non-Caregivers who were separated from all of their children (n = 378). Bivariate analyses and logistic regression were used to compare these mothers at intake on current drug use, risky sex practices, psychological symptoms, victimization, and aggression. RESULTS: Compared with Caregiver mothers, non-Caregivers reported higher frequencies of drug use, risky sex practices, psychological distress, and victimization experiences. Caregiver mothers were more likely than non-Caregiver mothers to have health insurance, but were less likely to have received drug treatment. Logistic regression found that non-Caregiver mothers were significantly more likely than Caregiver mothers to be older, to have been physically abused as children, to trade sex more frequently, to be homeless, and to have no health insurance. Recent crack use, psychological symptoms, and victimization were not significantly related to caregiver status. CONCLUSIONS: Findings that socio-environmental factors were more strongly associated with caregiver status than crack use underscore the importance of contextual issues such as housing, victimization history, and resources in serving maternal crack users. Community outreach and interventions that engage mothers who use drugs and live with their children may be more effective strategies than formal office-based services to link mothers who use crack and their children to needed drug treatment and family and child services.  相似文献   

Analyzing the use of Facebook among university libraries in Hong Kong     

Ernest Tak Hei Lam  Cheuk Hang Au  Dickson K.W. Chiu 《The Journal of Academic Librarianship》2019,45(3):175-183

In recent years, many academic libraries have started adopting social media by, for example, establishing their own Facebook pages. Our research investigates the current Facebook usage among seven university libraries in Hong Kong. Using a mixed-method research approach, we examined the characteristics of academic libraries Facebook usage and its effectiveness to engage with their patrons, based on online observations and Web content analysis from the publicly available data of the Facebook pages.Our results indicated that most libraries in Hong Kong adopted Facebook as a marketing tool, yet the user engagement level in these pages is low. In addition, we also discovered that communication-related posts and video-type posts can attract the most attention of patrons. Based on these outcomes, we provided some recommendations on the application of Facebook for academic libraries.  相似文献   

Are success and failure experiences equally motivational? An investigation of regulatory focus and feedback     

Tse-Mei Shu  Shui-fong Lam 《Learning and individual differences》2011,21(6):724-727

The present study extended regulatory focus theory (Idson & Higgins, 2000) to an educational setting and attempted to identify individuals with high motivation after both success and failure feedback. College students in Hong Kong (N = 180) participated in an experiment with a 2 promotion focus (high vs. low) × 2 prevention focus (high vs. low) × 2 feedback (success vs. failure) design. The results showed that after success feedback, the students with promotion focus were more motivated than their counterparts with prevention focus. This pattern was reversed after failure feedback. However, the results failed to show that students high in both regulatory focuses were motivated after success as well as failure feedback. The findings are discussed with reference to the literature on flexibility of regulatory focuses. Practical and theoretical implications of feedback are also discussed.  相似文献   

Microfluidic immunoassay for detection of serological antibodies: A potential tool for rapid evaluation of immunity against SARS-CoV-2     

Hogi Hartanto  Minghui Wu  Miu Ling Lam  Ting-Hsuan Chen 《Biomicrofluidics》2020,14(6)

In December 2019, coronavirus disease 2019 became a pandemic affecting more than 200 countries and territories. Millions of lives are still affected because of mandatory quarantines, which hamstring economies and induce panic. Immunology plays a major role in the modern field of medicine, especially against virulent infectious diseases. In this field, neutralizing antibodies are heavily studied because they reflect the level of infection and individuals'' immune status, which are essential when considering resumption of work, flight travel, and border entry control. More importantly, it also allows evaluating the antiviral vaccine efficacy as vaccines are still known for being the ultimate intervention method to inhibit the rapid spread of virulent infectious diseases. In this Review, we first introduce the host immune response after the infection of SARS-CoV-2 and discuss the latest results using conventional immunoassays. Next, as an enabling platform for detection with sufficient sensitivity while saving analysis time and sample size, the progress of microfluidic-based immunoassays is discussed and compared based on surface modification, microfluidic kinetics, signal output, signal amplification, sample matrix, and the detection of anti-SARS-CoV-2 antibodies. Based on the overall comparison, this Review concludes by proposing the future integration of visual quantitative signals on microfluidic devices as a more suitable approach for general use and large-scale surveillance.  相似文献   

Students’ engagement across a typology of teacher feedback practices     

Tay  Hui Yong  Lam  Karen W L 《Educational Research for Policy and Practice》2022,21(3):427-445

Educational Research for Policy and Practice - The provision of feedback is widely practised as part of formative assessment. However, studies that examine the impact of feedback are usually from...  相似文献