Background： Cross-country skiing （XCS） racing, a popular international winter sport, is complex and challenging from physical, technical, and tactical perspectives. Despite the vast amount of research focusing on t...Background： Cross-country skiing （XCS） racing, a popular international winter sport, is complex and challenging from physical, technical, and tactical perspectives. Despite the vast amount of research focusing on this sport, no review has yet addressed the pacing strategies of elite XCS racers or the factors that influence their performance. The aim was to review the scientific literature in an attempt to determine the effects of pacing strategy on the performance of elite XCS racers. Methods： Four electronic databases were searched using relevant subject headings and keywords. Only original research articles published in peerreviewed journals and the English language and addressing performance, biomechanics, physiology, and anthropometry of XCS racers were reviewed. Results： All 27 included articles applied correlative designs to study the effectiveness of different pacing strategies. None of the articles involved the use of an experimental design. Furthermore, potential changes in external conditions （e.g.,weather, ski properties） were not taken into consideration. A comparable number of studies focused on the skating or classical technique. In most cases, positive pacing was observed, with certain indications that higher-level athletes and those with more endurance and strength utilized a more even pacing strategy. The ability to achieve and maintain a long cycle length on all types of terrain was an important determinant of performance in all of the included studies, which was not the case for cycle rate. In general, uphill performance was closely related to overall race performance, with uphill performance being most closely correlated to the success of female skiers and performance on flat terrain being more important for male skiers. Moreover, pacing was coupled to the selection and distribution of technique during a race, with faster skiers employing more double poling and kick double poling, less diagonal stride, and more V2 （double dance） than V1 （single dance） skating across a race. Conclusion： We propose that skiers at all levels can improve their performance with more specific training in techniques （i.e., maintaining long cycles without compromising cycle rate and selecting appropriate techniques） in combination with training for endurance and more strength. Furthermore, we would advise less experienced skiers and/or those with lower levels of performance to apply a more even pacing strategy rather than a positive one （i.e., starting the race too fast）.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//creativecommons.org/licenses/by-nc-nd/4.0/）.展开更多
The probit analysis has been an important tool to predict seed longevity during storage and has been applied for seed drying simulation. Sealed aluminum pouches containing approximately 50 g of canola seed at moisture...The probit analysis has been an important tool to predict seed longevity during storage and has been applied for seed drying simulation. Sealed aluminum pouches containing approximately 50 g of canola seed at moisture range of 7% to 21% of water content web basis （%） were conditioned in water-bath at 50, 60 and 70℃ to obtain the model to evaluate the reduction of canola seed germination. This model was included in the drying simulation program and the estimated germination was compared to the experimental values of germination during drying to validate the model. Canola seeds at 21% of moisture content and germination of 93% were dried at 51℃ and 61 ℃, and the model represented significantly the drying experiments. The aim of this study was to propose a germination model to evaluate the quality of canola seeds during the drying process and to offer the seed producers an important tool to control the drying process. The experimental data validated the objectives of the proposed drying model, optimizing the process at given conditions, managing the energy consumption, according to the minimum germination or maximum moisture content limitation for seed storage. For 51℃, the drying time for canola seed would be about 6 h to maintain germination above 90% and for 61℃, 4 h of drying time maintained germination up to 89%.展开更多
In today＇s globalized world with English as the lingua franca, many countries, including the United Arab Emirates （UAE）, are focusing on English as a medium of instruction （EMI）. Due to the many expatriates resid...In today＇s globalized world with English as the lingua franca, many countries, including the United Arab Emirates （UAE）, are focusing on English as a medium of instruction （EMI）. Due to the many expatriates resident in the UAE English has become the main language of business, industry, and higher education. This paper looks at one of those English medium universities with an American curriculum. Since most American curriculums require substantial amounts of writing, it is important that students become competent at writing in their second language at this particular institution. This paper discusses how a novel assignment, allowing English as a foreign language （EFL） students to present readings in the classroom at an EMI university in the UAE, has helped them become both better readers and writers. Since the majority of the students are native speakers of Arabic, the project was designed with their oral traditions and proficiency in mind.展开更多
Language as a means of communication is represented in two basic forms, written and spoken. Spoken is the first form mastered by language speaker, particularly children. Speech community consists of adult and children...Language as a means of communication is represented in two basic forms, written and spoken. Spoken is the first form mastered by language speaker, particularly children. Speech community consists of adult and children. In producing their utterance, children are supposed to be affected by their parents. As a result of different educational background of their parents, children may produce different utterances including refusal. Children from different parents＇ educational background vary their refusal. The tendency that the higher parents＇ educational background will result the more polite refusal produced by children is not proved.展开更多
English Sitcoms are widely welcomed by teachers and students, but it has been debatable whether they are suitable for teaching material in English teaching. Though in these sitcoms spoken English with full-filled humo...English Sitcoms are widely welcomed by teachers and students, but it has been debatable whether they are suitable for teaching material in English teaching. Though in these sitcoms spoken English with full-filled humor is the main feature, there is still a long distance between real and Actors＇ lines. Through English spoken feature, we take American popular long sitcom ＂Friends＂ and ＂Big Bang＂ as the example, combined the analysis of real spoken language in the sitcom in order to dig out the suitability when we need to select appropriate teaching material.展开更多
文摘Background： Cross-country skiing （XCS） racing, a popular international winter sport, is complex and challenging from physical, technical, and tactical perspectives. Despite the vast amount of research focusing on this sport, no review has yet addressed the pacing strategies of elite XCS racers or the factors that influence their performance. The aim was to review the scientific literature in an attempt to determine the effects of pacing strategy on the performance of elite XCS racers. Methods： Four electronic databases were searched using relevant subject headings and keywords. Only original research articles published in peerreviewed journals and the English language and addressing performance, biomechanics, physiology, and anthropometry of XCS racers were reviewed. Results： All 27 included articles applied correlative designs to study the effectiveness of different pacing strategies. None of the articles involved the use of an experimental design. Furthermore, potential changes in external conditions （e.g.,weather, ski properties） were not taken into consideration. A comparable number of studies focused on the skating or classical technique. In most cases, positive pacing was observed, with certain indications that higher-level athletes and those with more endurance and strength utilized a more even pacing strategy. The ability to achieve and maintain a long cycle length on all types of terrain was an important determinant of performance in all of the included studies, which was not the case for cycle rate. In general, uphill performance was closely related to overall race performance, with uphill performance being most closely correlated to the success of female skiers and performance on flat terrain being more important for male skiers. Moreover, pacing was coupled to the selection and distribution of technique during a race, with faster skiers employing more double poling and kick double poling, less diagonal stride, and more V2 （double dance） than V1 （single dance） skating across a race. Conclusion： We propose that skiers at all levels can improve their performance with more specific training in techniques （i.e., maintaining long cycles without compromising cycle rate and selecting appropriate techniques） in combination with training for endurance and more strength. Furthermore, we would advise less experienced skiers and/or those with lower levels of performance to apply a more even pacing strategy rather than a positive one （i.e., starting the race too fast）.2018 Published by Elsevier B.V. on behalf of Shanghai University of Sport. This is an open access article under the CC BY-NC-ND license. （http：//creativecommons.org/licenses/by-nc-nd/4.0/）.
文摘The probit analysis has been an important tool to predict seed longevity during storage and has been applied for seed drying simulation. Sealed aluminum pouches containing approximately 50 g of canola seed at moisture range of 7% to 21% of water content web basis （%） were conditioned in water-bath at 50, 60 and 70℃ to obtain the model to evaluate the reduction of canola seed germination. This model was included in the drying simulation program and the estimated germination was compared to the experimental values of germination during drying to validate the model. Canola seeds at 21% of moisture content and germination of 93% were dried at 51℃ and 61 ℃, and the model represented significantly the drying experiments. The aim of this study was to propose a germination model to evaluate the quality of canola seeds during the drying process and to offer the seed producers an important tool to control the drying process. The experimental data validated the objectives of the proposed drying model, optimizing the process at given conditions, managing the energy consumption, according to the minimum germination or maximum moisture content limitation for seed storage. For 51℃, the drying time for canola seed would be about 6 h to maintain germination above 90% and for 61℃, 4 h of drying time maintained germination up to 89%.
文摘In today＇s globalized world with English as the lingua franca, many countries, including the United Arab Emirates （UAE）, are focusing on English as a medium of instruction （EMI）. Due to the many expatriates resident in the UAE English has become the main language of business, industry, and higher education. This paper looks at one of those English medium universities with an American curriculum. Since most American curriculums require substantial amounts of writing, it is important that students become competent at writing in their second language at this particular institution. This paper discusses how a novel assignment, allowing English as a foreign language （EFL） students to present readings in the classroom at an EMI university in the UAE, has helped them become both better readers and writers. Since the majority of the students are native speakers of Arabic, the project was designed with their oral traditions and proficiency in mind.
文摘Language as a means of communication is represented in two basic forms, written and spoken. Spoken is the first form mastered by language speaker, particularly children. Speech community consists of adult and children. In producing their utterance, children are supposed to be affected by their parents. As a result of different educational background of their parents, children may produce different utterances including refusal. Children from different parents＇ educational background vary their refusal. The tendency that the higher parents＇ educational background will result the more polite refusal produced by children is not proved.
文摘English Sitcoms are widely welcomed by teachers and students, but it has been debatable whether they are suitable for teaching material in English teaching. Though in these sitcoms spoken English with full-filled humor is the main feature, there is still a long distance between real and Actors＇ lines. Through English spoken feature, we take American popular long sitcom ＂Friends＂ and ＂Big Bang＂ as the example, combined the analysis of real spoken language in the sitcom in order to dig out the suitability when we need to select appropriate teaching material.
