Carbohydrate ingestion and soccer skill performance during prolonged intermittent exercise     

Ajmol Ali  Clyde Williams 《Journal of sports sciences》2013,31(14):1499-1508

Abstract

The aim of this study was to investigate the effect of ingesting a carbohydrate-electrolyte solution, during the 90-min Loughborough Intermittent Shuttle Test, on soccer skill performance. Seventeen male soccer players ingested either a 6.4% carbohydrate-electrolyte solution or placebo solution equivalent to 8 ml · kg^?1 body mass before exercise and 3 ml · kg^?1 body mass after every 15 min of exercise, in a double-blind randomized cross-over design, with the trials separated by 7 days. The evening before the main trial, the participants performed glycogen-reducing exercise on a cycle ergometer (80 min at 70%[Vdot]O_2max) and were then fed a low-carbohydrate meal. After a 12-h overnight fast, they performed The Loughborough Soccer Passing Test before and after every 15 min of exercise. Analysis of the combined skill test data showed a significant time effect (P = 0.001) with differences between 0–45 and 75–90 min (P < 0.05). There was a 3% reduction in skill performance from before to after exercise in the carbohydrate-electrolyte trial, whereas in the placebo trial the decrease was 14% (P = 0.07). In conclusion, skill performance during the simulated soccer activity appeared to deteriorate in the last 15–30 min of exercise. However, providing 52 g · h^?1 carbohydrate during exercise showed a tendency to better maintain soccer skill performance than a taste-matched placebo.  相似文献   

Exploring the uses of mobile phones to support informal learning     

Ieda M. Santos  Nagla Ali 《Education and Information Technologies》2012,17(2):187-203

This paper explores how a group of undergraduate students in the United Arab Emirates (UAE) use their mobile phones to perform informal learning activities related to the content of their courses outside the classroom. The paper also addresses the usefulness of informal learning activities to support students’ learning. The study adopts an exploratory case study design and uses multiple methods of data collection including questionnaires, interviews and diary entries. Main findings suggest that students performed informal learning activities mostly from home, interacting mainly with classmates. It also shows that students were in control of their informal learning activities without teachers’ input. However, it was found that students used only a limited number of applications but these were considered useful to their learning. The paper contributes to a discussion of the implications of training and instructor support to help students to take more advantage of mobile phone applications to support informal learning. Recommendations for further research are discussed.  相似文献   

Understanding the rise of e-participation in non-democracies: Domestic and international factors     

Joachim Åström  Martin Karlsson  Jonas Linde  Ali Pirannejad 《Government Information Quarterly》2012

While it has often been suggested that information and communication technologies (ICTs) provide an important means of increasing citizen participation (which is at the core of democratic government), few commentators have expected non-democracies to create online environments in which citizens can take an active part in political processes. In recent years, however, some non-democracies have begun to outperform countries with long-standing democratic traditions in terms of e-participation development. According to the 2010 United Nations (UN) e-government survey, Bahrain outranks France, Kazakhstan beats Sweden and Malaysia ranks higher than Germany. This article sets out to understand the recent rise of e-participation initiatives in non-democracies. Drawing on comparative longitudinal data from the UN e-government surveys, we tested the assertion that international drivers of change are competing with the dominant focus on domestic factors, especially in the non-democratic world, and are influencing the patterns of reform. The empirical analysis demonstrated important differences between the drivers of change in democratic and non-democratic countries and found economic globalization to be the strongest predictor of e-participation initiatives in non-democratic countries. In conclusion, we argue that economic globalization alters the context of e-participation and necessitates a re-examination of many of its premises and tenets.  相似文献   

Respiratory and Hemodynamic Responses to Mobilization of Critically Ill Obese Patients     

Arzu Genc  Seher Ozyurek  Ugur Koca  Ali Gunerli 《Cardiopulmonary Physical Therapy Journal》2012,23(1):14-18

Purpose

The aim of this study was to investigate the effects of mobilization on respiratory and hemodynamic parameters in critically ill obese patients.

Methods

Critically ill obese patients (n = 31) were included in this retrospective study. Data were collected from patients’ files and physiotherapy records of mobilization sessions. Heart rate (HR), systolic/diastolic/mean blood pressure, respiratory rate (RR), and percutaneous oxygen saturation (SpO₂) were recorded. Cardiorespiratory parameters were collected just prior to the mobilization, just after the completion of the mobilization and after 5 minutes recovery period. Respiratory reserve was calculated before and after the mobilization.

Results

A total of 37 mobilization sessions in 31 obese patients (mean age: 63.3 years, mean BMI: 32.2 kg/m²) who received physiotherapy were analyzed. Respiratory rate increased significantly after the completion of the mobilization compared to initial values (p < 0.05). SpO₂ significantly increased (p < 0.05) and all other parameters remained similar (p > 0.05) compared to initial values after the recovery period. Mobilization resulted in a significant increase in respiratory reserve (p < 0.05).

Conclusion

Early mobilization in intensive care unit promotes respiratory reserve in obese patients. We found that mobilization can be performed safely in critically ill obese patients if cardiorespiratory parameters are continuously monitored.Key Words: obesity, mobilization, critically ill patients, physiotherapy  相似文献   

A microfluidics approach towards high-throughput pathogen removal from blood using margination     

Wei Hou H  Gan HY  Bhagat AA  Li LD  Lim CT  Han J 《Biomicrofluidics》2012,6(2):24115-2411513

Sepsis is an adverse systemic inflammatory response caused by microbial infection in blood. This paper reports a simple microfluidic approach for intrinsic, non-specific removal of both microbes and inflammatory cellular components (platelets and leukocytes) from whole blood, inspired by the invivo phenomenon of leukocyte margination. As blood flows through a narrow microchannel (20 × 20 µm), deformable red blood cells (RBCs) migrate axially to the channel centre, resulting in margination of other cell types (bacteria, platelets, and leukocytes) towards the channel sides. By using a simple cascaded channel design, the blood samples undergo a 2-stage bacteria removal in a single pass through the device, thereby allowing higher bacterial removal efficiency. As an application for sepsis treatment, we demonstrated separation of Escherichia coli and Saccharomyces cerevisiae spiked into whole blood, achieving high removal efficiencies of ∼80% and ∼90%, respectively. Inflammatory cellular components were also depleted by >80% in the filtered blood samples which could help to modulate the host inflammatory response and potentially serve as a blood cleansing method for sepsis treatment. The developed technique offers significant advantages including high throughput (∼1 ml/h per channel) and label-free separation which allows non-specific removal of any blood-borne pathogens (bacteria and fungi). The continuous processing and collection mode could potentially enable the return of filtered blood back to the patient directly, similar to a simple and complete dialysis circuit setup. Lastly, we designed and tested a larger filtration device consisting of 6 channels in parallel (∼6 ml/h) and obtained similar filtration performances. Further multiplexing is possible by increasing channel parallelization or device stacking to achieve higher throughput comparable to convectional blood dialysis systems used in clinical settings.  相似文献   

Public policy for academic quality: Analyses of innovative policy instruments     

Ali Ait Si Mhamed 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2011,57(5-6):763-765

  相似文献   

Voices from Mexico: How American Teachers can Meet the Needs of Mexican Immigrant Students   总被引：1，自引：0，他引：1  

Ali Borjian  Amado M. Padilla 《The Urban Review》2010,42(4):316-328

In this study 18 Mexican teachers of English as a foreign language in Guanajuato, Mexico were asked for their professional opinion about the teaching of English to Mexican immigrant students in the U.S. Teachers responded to a questionnaire that asked about attitudes toward the U.S. educational system, ways to support Mexican immigrant students, advice for American teachers, and Mexican students’ motivation for learning English. Respondents averaged 4 years of teaching English at various levels ranging from elementary to university. Half of the teachers had received some K-12 education in the U.S. Respondents held generally positive views regarding the U.S. educational system, but felt American teachers could do a better job in teaching Mexican immigrant students. They offered numerous linguistic and culturally responsive suggestions for improving upon the learning of English and the academic performance of immigrant students.  相似文献   

Students＇ mental health： Personal and university determinants     

Siamak Khodarahimi  Ali Rasti  Malihe Khajehie  Rea Sattar 《美中教育评论》2009,6(10):31-38

The present study was to examine the effects of personal and university bounded factors in students mental health in north of Fars province, Iran. The effects of these factors on university students＇ psychopathology within a survey design were investigated among 300 participants--94 males and 206 females, who were selected through random sampling method and the degrees of their mental health, were measured by SCL-90-R checklist. Overall findings supported that gender, marital status, socioeconomic status as personal factors, and type of university as within university factor would influence students＇ mental health. So males, married, and students with moderate and high socioeconomic status had more significant better mental health situation than females, singles and those with low socioeconomic status. Finally, ethnicity, dormitory and non-dormitory residence, native or non-native being, discipline, school and faculty, and academic performance variables were not effective on students＇ mental health significantly. Here, it was suggested an explanatory triangle model for university students＇ mental health explanation with respect to gendered and socio-cultural contexts and their implications in clinical and educational settings.  相似文献   

Turning the focus from ‘Other’ to science education: exploring the invisibility of Whiteness     

Ali Sammel 《Cultural Studies of Science Education》2009,4(3):649-656

This paper provides another way to gaze upon Brad’s story as presented by van Eijck and Roth (2010). It raises questions about infrastructural racism in contemporary science education by exploring its association with Whiteness and White privilege. To explore the racial positioning inherent in Western science education specific attention is given to the positions of power that accompany Western ways of knowing the world (i.e., science education) in comparison to Other ways of knowing the world (i.e., First Nations Ways of Knowing). The paper suggests the power relationships inherent within this dualism are asymmetrical due to the implications of Whiteness within colonial societies. Even though power relations were not discussed in Brad’s story, the paper suggests the implications were visible. The paper concludes by advocating for a re-imagining in science education where the traditional ontological and epistemological foundations are deconstructed and spaces are created for enacting practical ways of resisting oppression.

Ali SammelEmail:

---

Alison Sammel   received her doctorate in 2005 for a study that used critical theory and feminist poststructuralism to analyze how five science teachers believed they incorporated critical forms of pedagogy in their high school science classrooms. Intrigued by the social construction of the ‘Western science teacher’ she continues to explore the teaching and learning of Science through the lens of feminist poststructuralism. Alison currently teaches at the School of Education and Professional Studies at Griffith University on the Gold Coast and researches in the fields of Science and Anti-oppressive pedagogies.  相似文献   

Science Letters: Low-cost fault tolerance in evolvable multiprocessor systems: a graceful degradation approach     

Shervin VAKILI  Sied Mehdi FAKHRAIE  Siamak MOHAMMADI  Ali AHMADI 《浙江大学学报(A卷英文版)》2009,10(6)

The evolvable multiprocessor (EvoMP), as a novel multiprocessor system-on-chip (MPSoC) machine with evolvable task decomposition and scheduling, claims a major feature of low-cost and efficient fault tolerance. Non-centralized control and adaptive distribution of the program among the available processors are two major capabilities of this platform, which remarkably help to achieve an efficient fault tolerance scheme. This letter presents the operational as well as architectural details of this fault tolerance scheme. In this method, when a processor becomes faulty, it will be eliminated of contribution in program execution in remaining run-time. This method also utilizes dynamic rescheduling capability of the system to achieve the maximum possible efficiency after processor reduction. The results confirm the efficiency and remarkable advantages of the proposed approach over common redundancy based techniques in similar systems.  相似文献