Network-based synchronization of T–S fuzzy chaotic systems with asynchronous samplings

In this paper, we study the problem of network-based synchronization of chaotic systems in Takagi–Sugeno (T–S) fuzzy form, in which the master and slave fuzzy chaotic systems are connected with a continuous-time controller through a network. In all communication channels, asynchronous samplings and external disturbances are considered. The asynchronously sampled state information of the master and slave systems received in the controller is treated by designing an observer for estimating the states of the master system. Then, based on the observation result, the problem of asynchronous samplings between the slave-controller and controller-slave channels is solved in two different cases. Sufficient conditions for the existence of the desired observer and controllers for each asynchronous cases are presented in the form of linear matrix inequalities. An numerical example is given to illustrate the validity and potential of the proposed new design techniques.     

The Singapore Football League, 1904–1941: Towards the Institutionalization of Football in the Colonial Port City of Singapore

Abstract

The Singapore Football Association (SFA) was founded in 1892. In 1904, the YMCA initiated the first football league with 12 teams from military and European clubs and School Old Boys’ teams. The first phase from 1904 to 1913 was restricted to European and Eurasian only. The military teams won six out of the nine tournaments. The second phase of the league began in 1917 and from 1921 to 1941. The Straits Chinese Football Association (SCFA) took part in the league and the rejuvenated SFA included a representative from the SCFA. The Singapore Football League started with two divisions 1921 and participating teams from the SCFA in the same year and the Malaya Football Association (MFA) in 1924. The SCFA won the league for the first time in 1925 and subsequently in 1930, 1937, and 1938. In 1929, the SFA was renamed the Singapore Amateur Football Association (SAFA). The MFA won the League for the first time in 1931, and the first local team to win three years in succession from 1931 to 1933. From 1931 to 1941 the local teams won seven league titles out of 11. By 1940 the League grew with 44 teams in three divisions.     

The effect of caffeine ingestion on human neutrophil oxidative burst responses following time-trial cycling

Following fixed-duration exercise of submaximal intensity, caffeine ingestion is associated with an attenuation of the exercise-induced decline in N-formyl-methionyl-phenyl-alanine (f-MLP) stimulated neutrophil oxidative burst. However, the response following high-intensity exhaustive exercise is unknown. Nine endurance-trained male cyclists ingested 6 mg caffeine or placebo per kilogram of body mass 60 min before cycling for 90 min at 70% of maximal oxygen consumption (VO2max) and then performing a time-trial requiring an energy expenditure equivalent to 30 min cycling at 70% maximum power output. Time-trial performance was 4% faster in the caffeine than in the placebo trial (P = 0.043). Caffeine was associated with an increased plasma adrenaline concentration after 90 min of exercise (P = 0.046) and immediately after the time-trial (P = 0.02). Caffeine was also associated with an increased serum caffeine concentration (P < 0.01) after 90 min of exercise and immediately after the time-trial, as well as 1 h after the time-trial. However, the f-MLP-stimulated neutrophil oxidative burst response fell after exercise in both trials (P = 0.002). There was no effect of caffeine on circulating leukocyte or neutrophil counts, but the lymphocyte count was significantly lower on caffeine (20%) after the time-trial (P = 0.003). Our results suggest that high-intensity exhaustive exercise negates the attenuation of the exercise-induced decrease in neutrophil oxidative burst responses previously observed when caffeine is ingested before exercise of fixed duration and intensity. This may be associated with the greater increase in adrenaline concentration observed in the present study.     

Scan and Learn: Quick Response Code Enabled Museum for Mobile Learning of Anatomy and Pathology

In the past, medical museums played a significant role in anatomy and pathology training. The attraction of medical museums has declined recently due to the emergence of information technology and innovative medical curricula. An innovative mobile learning platform has been developed using quick response (QR) codes for the museum specimens at the Lee Kong Chain School of Medicine, Singapore. High-quality images of the potted specimens were captured and combined into an album and a video using Adobe Acrobat Pro 9 and Windows Movie Maker, respectively. Subsequently, QR codes were generated linking to PDF documents with annotations, pathology, and clinical history concerning the specimens. Quick response codes were piloted in gastrointestinal teaching module for Year 2 medical students. Survey responses were obtained from students to verify the efficacy of QR as a learning tool. The majority of students either agreed or strongly agreed that it was easy to access the information about the specimen with QR codes (4.47 ± 0.84), while 96% of students agreed that they are able to correlate the specimen with the annotated images (4.56 ± 0.56). The majority of students (78%) agreed that QR codes are useful for their learning (4.22 ± 0.87), while 75% of students felt QR codes motivate them to visit Anatomy Resource Centre. Most of the students agreed that QR codes are useful for revision of materials (4.13 ± 1.07) and independent learning (4.38 ± 0.87). These findings suggest that QR codes are not only effective for students learning but also enhance their exploration experience with the museum specimens.     

Diversity Competencies within Early Childhood Teacher Preparation: Innovative Practices and Future Directions

With classrooms becoming increasingly diverse due to children’s various cultural backgrounds and varying abilities, early childhood teacher education programs face the challenge of how best to prepare the workforce. Various initiatives have been implemented in teacher preparation programs to prepare early childhood educators to become competent in relating to all children and families. Infusing components of diversity into all courses and field experiences and engaging in community–university partnerships, as well as unifying early childhood education (ECE) and early childhood special education (ECSE) program components, are promising practices for the field. An examination and evaluation of these initiatives are discussed in this article, as well as future directions for research and practice.     

“与君话冷炎州月”——古典诗文中的新加坡

新华古典诗文中所隐藏的史料,很少为学者重视.以古典诗文作为切入点,通过古典诗文,考察与了解19世纪新加坡的历史、人文社会风貌及其与中国近代史的关系,这为学者们研究新华历史、研究华人社会文献,提供了一个新的尝试.     

College students’ credibility judgments and heuristics concerning Wikipedia

This study examined: (1) whether a peripheral cue and subject knowledge influenced the credibility judgments in the context of Wikipedia; and (2) whether certain factors affected heuristic processing in the context of Wikipedia. The theory of bounded rationality and the heuristic-systematic model serve as the basis of this study. Data were collected employing a quasi-experiment and a web survey at a large public university in the Midwestern United States in the fall of 2011. The study participants consisted of undergraduate students from nine courses whose instructors agreed to their participation. A total of 142 students participated in the study, of which a total of 138 surveys were useable. The major findings of this study include the following: a peripheral cue and knowledge influenced the credibility judgments of college students concerning Wikipedia. The effect of a peripheral cue on credibility judgments was not different between those with high versus low knowledge. Finally, perceived credibility was positively related to heuristic processing, but knowledge, cognitive workload or involvement in a topic was not. This study suggests that educators and librarians need to integrate heuristic approaches into their literacy programs, guiding students to effectively use and not blindly accept cues. Wikipedia needs to offer noticeable cues that can help Wikipedia readers assess the credibility of information. The role of perceptions in heuristic processing needs further investigation. Further, this study demonstrates the strength of a peripheral cue on credibility judgments, suggesting that further research is needed when cues lead to effective credibility judgments and when cues lead to biased credibility judgments. Finally, this study provides the suggestion of an integrated model of the theory of bounded rationality and the heuristic-systematic model that can enhance our understanding of heuristics in relation to credibility judgments.     

Understanding Preservice Teacher Skills to Construct Lesson Plans

This study examined preservice teachers’ (PSTs) capacity for lesson planning in a university-based teacher preparation program in the USA Participants (n?=?126) wrote lesson plans in three approaches: synthesis, creation, and modification. Findings indicate that PSTs who modified preexisting lesson plans produced better lesson plans than their peers and reported higher efficacy in their use of the lesson plan in their field experiences. This study supports the notion that the efficacy of first-year teaching lies more appropriately in the area of enacting curriculum than in the area of designing curriculum. With respect to career-long learning, PSTs’ abilities to do curriculum work are likely to improve, as they grow more familiar with students and existing excellent curricula over years. Although the study presents a snapshot of U.S. preservice teachers’ capacity for curriculum design, the findings may serve to inform the literature on the developmental aspect of curriculum design for teacher education systems across the world.     

A qualitative inquiry on sources of teacher efficacy in teaching low-achieving students

Developing a high level of efficacy can be challenging to teachers who work with low-achieving students. The authors adopted a pragmatic qualitative research design to investigate the sources of efficacy information reported by five high-efficacy teachers and four low-efficacy teachers of secondary low-achieving students in Singapore. The results show that the psychological sources of information postulated by Albert Bandura (i.e., mastery experiences, verbal persuasion, vicarious experience, and physiological and emotional arousal), are valid but insufficient to explain high teacher efficacy. Three additional nonpsychological sources of information, including teachers' knowledge about students, rapport with students, and previous working experiences, also played significant roles in the creation of high teacher efficacy.     

Evaluating a bedside tool for neuroanatomical localization with extended‐matching questions

Neuroanatomical localization (NL) is a key skill in neurology, but learners often have difficulty with it. This study aims to evaluate a concise NL tool (NLT) developed to help teach and learn NL. To evaluate the NLT, an extended‐matching questions (EMQ) test to assess NL was designed and validated. The EMQ was validated with fourth‐year medical students and internal medicine and neurology residents. The NLT's usability was evaluated with third‐ and fourth‐year students, and the effectiveness was evaluated with an experimental study of second‐year students, using the EMQ as the outcome measure. Students were taught how to use both the NLT and textbook algorithms (control) to perform NL, then randomized into either group, and only allowed to use their assigned tool to complete the EMQ. Primary outcome was the difference in mean EMQ scores expressed as a percentage of total score. For EMQ validation, students (n = 56) scored lower than residents (n = 50) (76.7% ± 1.7 vs. 83.0% ± 1.6; mean ± standard error of mean, P < 0.009). The EMQ demonstrated good reliability (Cronbach's α 0.85) and generalizability (G‐coefficient 0.85). Third‐ (n = 77) and fourth‐year (n = 42) students found the NLT user‐friendly and helpful in their learning of NL. In the experimental study, scores were significantly higher for NLT group (n = 94) than for controls (n = 101) (42.5 vs. 37.0%, P = 0.014); the effect size (Cohen's d) was 0.36. The EMQ is validated to reliably assess NL and is generalizable, feasible, practical, and of low cost. The concise and user‐friendly NLT for NL was effective in aiding medical student performance of NL. Anat Sci Educ 11: 262–269. © 2017 American Association of Anatomists.