In this study,a zwitterionic polymer/liquid crystals composite film with programming shape-morphing behavior and humidityresponsive self-healing performance was prepared by blending a zwitterionic polymer and liquid c...In this study,a zwitterionic polymer/liquid crystals composite film with programming shape-morphing behavior and humidityresponsive self-healing performance was prepared by blending a zwitterionic polymer and liquid crystalline azobenzene compound in solution,followed by film-forming in a mold without tedious or multistep synthetic route.The as-obtained zwitterionic polymer/liquid crystal composite film exhibited programming shape-morphing behavior under different stimuli.In this process,the temporary shape of the composite film was memorized after the removal of the stimuli.Such characteristics would fit the requirements of intelligence and energy-saving for stimuliresponsive shape-changing materials.Moreover,the composite film showed humidity-responsive self-healing performances under wet conditions at room temperature.In summary,the simple design and preparation route of the zwitterionic polymer/liquid crystal composite film with programming shape-morphing behavior and mild condition-responsive self-healing performance look promising for the fabrication and practical application of novel photo-driven devices and soft robotics.展开更多
Background: A systematic review portraying the changing pattern of sexual behaviors, STI and HIV prevalence and key strategies curb HIV and STI among truckers in India is lacking. This paper therefore aims to present ...Background: A systematic review portraying the changing pattern of sexual behaviors, STI and HIV prevalence and key strategies curb HIV and STI among truckers in India is lacking. This paper therefore aims to present a chronological review of literature regarding sexual behaviors, STI/HIV prevalence, and various HIV prevention programs implemented among truckers in India. Methodology: Published and unpublished studies (1990-2011) were identified through electronic databases, and hand searching. Results: Most studies on sexual behaviors and STI/HIV prevalence among truckers focused only on drivers and ignored their helpers. Evidences suggest that consistent condom use by truckers with both paid and non-paid female partners has increased during the past decade. Many recent studies suggest that the HIV prevalence among truckers is about 2% and it has been declining slowly during the past decade. The HIV prevention programs among truckers which started with the aim of raising awareness about HIV during early 1990s, have grown multi-folds to encompass not only the standard strategies like mid-media events, interpersonal counselling and STI care for HIV prevention, but also innovations such as the use of business franchisee models, and integrated research and evidence based planning in the program. The possibilities of using new approaches such as male circumcision and the use of pre-exposure prophylaxes are underway. Conclusion: More studies are needed to explore helpers’ vulnerabilities to HIV. Very few studies have attempted to examine the impact of large-scale prevention programs among truckers. Efforts are required to examine the impact of different components of such programs to guide the HIV prevention efforts among truckers in India.展开更多
This study examined the effects of the Hizen Alcoholism Prevention Program (HAPPY) and the revised version of HAPPY (HAPPY Plus), and also compared the two programs to determine whether the HAPPY Plus achieved better ...This study examined the effects of the Hizen Alcoholism Prevention Program (HAPPY) and the revised version of HAPPY (HAPPY Plus), and also compared the two programs to determine whether the HAPPY Plus achieved better outcomes for heavy drinkers in the workplace. The HAPPY Plus designed to strengthen participants’ recruitment, perception of threat, stress management, behavior modification by self-monitoring using a calendar-based diary, and to prevent dropout by telephone and e-mail follow-up by a trained nurse. Participants were men and women who consumed at least 20 g and 10 g of alcohol daily, respectively, and had not been diagnosed with alcohol dependence. A group intervention, 3-month randomized controlled trial was conducted. The control and intervention groups received the HAPPY and HAPPY Plus, respectively. The primary endpoint was average daily alcohol consumption. The Alcohol Use Disorders Identification Test (AUDIT), weight, body mass index, blood pressure, liver function, goal achievement rate, self-efficacy, and self-esteem were also measured. Out of 88 recruited employees, 83 (intervention group: 40;control group: 43) completed the study (completion rates were 100% and 93.4% respectively). As a result, average daily alcohol consumption decreased significantly in both groups (p < 0.001), but did not differ between groups. Even though behavior change rate was higher, and self-efficacy and confidence increased in the intervention group, AUDIT decreased in both groups but was significant only in the control group. Physiological indicators in the intervention group improved, but were not significant between the groups. Against the program revision, this study did not prove superiority of HAPPY Plus to the HAPPY regarding the indicators. However, better behavior modification and lower dropout were observed in the HAPPY Plus. Therefore, after further improvement is made, this group intervention program is applied to the workplace.展开更多
Rather than maintaining the classic teaching approach, a growing number of schools use the blended learning system in higher education. The traditional method of teaching focuses on the result of students' progres...Rather than maintaining the classic teaching approach, a growing number of schools use the blended learning system in higher education. The traditional method of teaching focuses on the result of students' progress. However, many student activities are recorded by an online programming learning platform at present. In this paper, we focus on student behavior when completing an online open-ended programming task. First, we conduct statistical analysis to examine student behavior on the basis of test times and completed time. By combining these two factors, we then classify student behavior into four types by using k-means algorithm. The results are useful for teachers to enhance their understanding of student learning and for students to know their learning style in depth. The findings are also valuable to re-design the learning platform.展开更多
In a multi-agent system, each agent must adapt itself to the environment and coordinate with other agents dynamically. TO predict or cooperate with the behavior of oiller agents. An agent should dynamically establish ...In a multi-agent system, each agent must adapt itself to the environment and coordinate with other agents dynamically. TO predict or cooperate with the behavior of oiller agents. An agent should dynamically establish and evolve the cooperative behavior model of itself. In this paper, we represent the behavior model of an agent as a f-mite state machine and propose a new method of dynamically evolving the behavior model of an agent by evolutionary programming.展开更多
The reduction behavior of pellet was researched through the programming apparatus under simulated con- ditions of oxygen blast furnace （OBF） and traditional blast furnace （T-BF）. The results indicated that compare...The reduction behavior of pellet was researched through the programming apparatus under simulated con- ditions of oxygen blast furnace （OBF） and traditional blast furnace （T-BF）. The results indicated that compared with traditional blast furnace, the reduction starting temperature of pellet decreased by 60 ℃ under oxygen blast furnace condition. The reduction degree of pellet could almost reach 100% under oxygen blast furnace condition when the temperature reached 1100 ℃, whereas it was only 82.49% in traditional blast furnace. The content of carbon in pel- let of oxygen blast furnace was about 5 times more than that of traditional blast furnace. In addition, the microstruc- ture at the periphery and core of pellets after reaction was characterized by means of SEM and EDS.展开更多
he transition from traditional learning to practice-oriented programming learning will bring learners discomfort.The discomfort quickly breeds negative emotions when encountering programming difficulties,which leads t...he transition from traditional learning to practice-oriented programming learning will bring learners discomfort.The discomfort quickly breeds negative emotions when encountering programming difficulties,which leads the learner to lose interest in programming or even give up.Emotion plays a crucial role in learning.Educational psychology research shows that positive emotion can promote learning performance,increase learning interest and cultivate creative thinking.Accurate recognition and interpretation of programming learners’emotions can give them feedback in time,and adjust teaching strategies accurately and individually,which is of considerable significance to improve effects of programming learning and education.The existing methods of sensor-free emotion prediction include emotion prediction based on keyboard dynamic,mouse interaction data and interaction logs,respectively.However,none of the three studies considered the temporal characteristics of emotion,resulting in low recognition accuracy.For the first time,this paper proposes an emotion prediction model based on time series and context information.Then,we establish a Bi-recurrent neural network,obtain the time sequence characteristics of data automatically,and explore the application of deep learning in the field of Academic Emotion prediction.The results show that the classification ability of this model is much better than that of the original LSTM(Long-Short Term Memory),GRU(Gate Recurrent Unit)and RNN(Re-current Neural Network),and this model has better generalization ability.展开更多
In 2010, the World Health Organization supported the Lebanese Ministry of Education and Higher Education to establish a network of 10 Health Promoting Schools (HPS). This study was undertaken to address the extent to ...In 2010, the World Health Organization supported the Lebanese Ministry of Education and Higher Education to establish a network of 10 Health Promoting Schools (HPS). This study was undertaken to address the extent to which the HPS model was able to produce changes in the risk behaviors of adolescents (Smoking, Drinking, and Drug Use) and prepare them to respond to evolving health challenges. A cross-sectional survey was carried out during 2011-2012 and compared Grade 6 - 9 students in HPS, and 10 other public and private schools. The Youth Risk Behavior Survey [1], and Carbon Monoxide measurements in adolescent breaths were used for data collection. Findings revealed that the current School Health Program failed to address issues of concern to adolescents with no significant differences in risk behaviors: smoking, alcohol and drug use. The HPS network needs reassessment to upgrade the outcomes of health education curricula. Expected learning outcomes and healthy practices must be designed to match students’ age, grade level, and developmental milestones.展开更多
Existing literature indicates that a weight-management program that includes diet modification, Physical Activity (PA) instructions and behavioral modification in weight reduction increases obese adolescents’ partici...Existing literature indicates that a weight-management program that includes diet modification, Physical Activity (PA) instructions and behavioral modification in weight reduction increases obese adolescents’ participation in PA. However, the effect of such a program on obese Saudi adolescents is unknown. Objective: To examine the effects of a weight-management program in terms of decreasing Body Mass Index (BMI) and improving participation in PA in obese Saudi adolescents, and to establish whether differences exist between genders in response to a weight-management program. PA was measured by Arab Teens Life Style (ATLS) questionnaire for both groups. Results: A wide range of differences in PA and sedentary time are evident between new and weight- managed patients and two genders. PA performance was significantly higher among the weight- managed patients compared with new patients. Also, for boys there were no differences between both groups in PA performance. While, girls’ PA was significantly higher among the girls in weight- managed group compared with girls in new patients group. Weight-managed patients spend significantly less time on the computer and/or the Internet per day compared with new patients. After treatment, the mean BMI among the weight-managed patients slightly decreased. Conclusion: The study findings suggest that the weight-management program could be effective in treating Saudi obese adolescents due to its effect in BMI reduction and greater improvement in PA performance. The surprising result from this study, PA differences between the groups were because of the total PA of girls only, meaning that obesity treatment program can lower the percentage of obesity among women and increase their levels of physical activity.展开更多
In order to verify requirements model/document the consistency between software and users＇ true minds, we present a software behavior-oriented requirements visualization method. The implementation method for software...In order to verify requirements model/document the consistency between software and users＇ true minds, we present a software behavior-oriented requirements visualization method. The implementation method for software behavior-oriented requirements visualization is advanced in this paper first. Then, the basis language is introduced as the foundation of the method. At last, we put forward the tool platform that can achieve the requirement visualization, The result demonstrates that the method can generate requirement animation rapidly to check the correctness of the requirement. It can effectively reduce the requirements change and save a lot of software development costs.展开更多
基金the National Natural Science Foundation of China(Nos.51773120 and 51802201)the Guangdong Basic and Applied Basic Research Foundation(No.2022A1515011985)+1 种基金the Shenzhen Science and Technology Planning Project(Nos.JCYJ20190808115609663 and JCYJ20190808123207674)the Scientific Research Project of Guangdong Provincial Department of Education(No.2020ZDZX2040).
文摘In this study,a zwitterionic polymer/liquid crystals composite film with programming shape-morphing behavior and humidityresponsive self-healing performance was prepared by blending a zwitterionic polymer and liquid crystalline azobenzene compound in solution,followed by film-forming in a mold without tedious or multistep synthetic route.The as-obtained zwitterionic polymer/liquid crystal composite film exhibited programming shape-morphing behavior under different stimuli.In this process,the temporary shape of the composite film was memorized after the removal of the stimuli.Such characteristics would fit the requirements of intelligence and energy-saving for stimuliresponsive shape-changing materials.Moreover,the composite film showed humidity-responsive self-healing performances under wet conditions at room temperature.In summary,the simple design and preparation route of the zwitterionic polymer/liquid crystal composite film with programming shape-morphing behavior and mild condition-responsive self-healing performance look promising for the fabrication and practical application of novel photo-driven devices and soft robotics.
文摘Background: A systematic review portraying the changing pattern of sexual behaviors, STI and HIV prevalence and key strategies curb HIV and STI among truckers in India is lacking. This paper therefore aims to present a chronological review of literature regarding sexual behaviors, STI/HIV prevalence, and various HIV prevention programs implemented among truckers in India. Methodology: Published and unpublished studies (1990-2011) were identified through electronic databases, and hand searching. Results: Most studies on sexual behaviors and STI/HIV prevalence among truckers focused only on drivers and ignored their helpers. Evidences suggest that consistent condom use by truckers with both paid and non-paid female partners has increased during the past decade. Many recent studies suggest that the HIV prevalence among truckers is about 2% and it has been declining slowly during the past decade. The HIV prevention programs among truckers which started with the aim of raising awareness about HIV during early 1990s, have grown multi-folds to encompass not only the standard strategies like mid-media events, interpersonal counselling and STI care for HIV prevention, but also innovations such as the use of business franchisee models, and integrated research and evidence based planning in the program. The possibilities of using new approaches such as male circumcision and the use of pre-exposure prophylaxes are underway. Conclusion: More studies are needed to explore helpers’ vulnerabilities to HIV. Very few studies have attempted to examine the impact of large-scale prevention programs among truckers. Efforts are required to examine the impact of different components of such programs to guide the HIV prevention efforts among truckers in India.
文摘This study examined the effects of the Hizen Alcoholism Prevention Program (HAPPY) and the revised version of HAPPY (HAPPY Plus), and also compared the two programs to determine whether the HAPPY Plus achieved better outcomes for heavy drinkers in the workplace. The HAPPY Plus designed to strengthen participants’ recruitment, perception of threat, stress management, behavior modification by self-monitoring using a calendar-based diary, and to prevent dropout by telephone and e-mail follow-up by a trained nurse. Participants were men and women who consumed at least 20 g and 10 g of alcohol daily, respectively, and had not been diagnosed with alcohol dependence. A group intervention, 3-month randomized controlled trial was conducted. The control and intervention groups received the HAPPY and HAPPY Plus, respectively. The primary endpoint was average daily alcohol consumption. The Alcohol Use Disorders Identification Test (AUDIT), weight, body mass index, blood pressure, liver function, goal achievement rate, self-efficacy, and self-esteem were also measured. Out of 88 recruited employees, 83 (intervention group: 40;control group: 43) completed the study (completion rates were 100% and 93.4% respectively). As a result, average daily alcohol consumption decreased significantly in both groups (p < 0.001), but did not differ between groups. Even though behavior change rate was higher, and self-efficacy and confidence increased in the intervention group, AUDIT decreased in both groups but was significant only in the control group. Physiological indicators in the intervention group improved, but were not significant between the groups. Against the program revision, this study did not prove superiority of HAPPY Plus to the HAPPY regarding the indicators. However, better behavior modification and lower dropout were observed in the HAPPY Plus. Therefore, after further improvement is made, this group intervention program is applied to the workplace.
基金supported by the National Grand R&D Plan (Grant No.2016YFB1000805)National Natural Science Foundation of China (Grant No.61702534,61432020,61472430,61502512)
文摘Rather than maintaining the classic teaching approach, a growing number of schools use the blended learning system in higher education. The traditional method of teaching focuses on the result of students' progress. However, many student activities are recorded by an online programming learning platform at present. In this paper, we focus on student behavior when completing an online open-ended programming task. First, we conduct statistical analysis to examine student behavior on the basis of test times and completed time. By combining these two factors, we then classify student behavior into four types by using k-means algorithm. The results are useful for teachers to enhance their understanding of student learning and for students to know their learning style in depth. The findings are also valuable to re-design the learning platform.
文摘In a multi-agent system, each agent must adapt itself to the environment and coordinate with other agents dynamically. TO predict or cooperate with the behavior of oiller agents. An agent should dynamically establish and evolve the cooperative behavior model of itself. In this paper, we represent the behavior model of an agent as a f-mite state machine and propose a new method of dynamically evolving the behavior model of an agent by evolutionary programming.
基金Sponsored by National Basic Research Program of China(2012CB720401)Natural Science Foundation of China and Baosteel(51134008)
文摘The reduction behavior of pellet was researched through the programming apparatus under simulated con- ditions of oxygen blast furnace （OBF） and traditional blast furnace （T-BF）. The results indicated that compared with traditional blast furnace, the reduction starting temperature of pellet decreased by 60 ℃ under oxygen blast furnace condition. The reduction degree of pellet could almost reach 100% under oxygen blast furnace condition when the temperature reached 1100 ℃, whereas it was only 82.49% in traditional blast furnace. The content of carbon in pel- let of oxygen blast furnace was about 5 times more than that of traditional blast furnace. In addition, the microstruc- ture at the periphery and core of pellets after reaction was characterized by means of SEM and EDS.
基金supported by the 2018-2020 Higher Education Talent Training Quality and Teaching Reform Project of Sichuan Province(Grant No.JG2018-46)the Science and Technology Planning Program of Sichuan University and Luzhou(Grant No.2017CDLZG30)the Postdoctoral Science fund of Sichuan University(Grant No.2019SCU12058).
文摘he transition from traditional learning to practice-oriented programming learning will bring learners discomfort.The discomfort quickly breeds negative emotions when encountering programming difficulties,which leads the learner to lose interest in programming or even give up.Emotion plays a crucial role in learning.Educational psychology research shows that positive emotion can promote learning performance,increase learning interest and cultivate creative thinking.Accurate recognition and interpretation of programming learners’emotions can give them feedback in time,and adjust teaching strategies accurately and individually,which is of considerable significance to improve effects of programming learning and education.The existing methods of sensor-free emotion prediction include emotion prediction based on keyboard dynamic,mouse interaction data and interaction logs,respectively.However,none of the three studies considered the temporal characteristics of emotion,resulting in low recognition accuracy.For the first time,this paper proposes an emotion prediction model based on time series and context information.Then,we establish a Bi-recurrent neural network,obtain the time sequence characteristics of data automatically,and explore the application of deep learning in the field of Academic Emotion prediction.The results show that the classification ability of this model is much better than that of the original LSTM(Long-Short Term Memory),GRU(Gate Recurrent Unit)and RNN(Re-current Neural Network),and this model has better generalization ability.
文摘In 2010, the World Health Organization supported the Lebanese Ministry of Education and Higher Education to establish a network of 10 Health Promoting Schools (HPS). This study was undertaken to address the extent to which the HPS model was able to produce changes in the risk behaviors of adolescents (Smoking, Drinking, and Drug Use) and prepare them to respond to evolving health challenges. A cross-sectional survey was carried out during 2011-2012 and compared Grade 6 - 9 students in HPS, and 10 other public and private schools. The Youth Risk Behavior Survey [1], and Carbon Monoxide measurements in adolescent breaths were used for data collection. Findings revealed that the current School Health Program failed to address issues of concern to adolescents with no significant differences in risk behaviors: smoking, alcohol and drug use. The HPS network needs reassessment to upgrade the outcomes of health education curricula. Expected learning outcomes and healthy practices must be designed to match students’ age, grade level, and developmental milestones.
文摘Existing literature indicates that a weight-management program that includes diet modification, Physical Activity (PA) instructions and behavioral modification in weight reduction increases obese adolescents’ participation in PA. However, the effect of such a program on obese Saudi adolescents is unknown. Objective: To examine the effects of a weight-management program in terms of decreasing Body Mass Index (BMI) and improving participation in PA in obese Saudi adolescents, and to establish whether differences exist between genders in response to a weight-management program. PA was measured by Arab Teens Life Style (ATLS) questionnaire for both groups. Results: A wide range of differences in PA and sedentary time are evident between new and weight- managed patients and two genders. PA performance was significantly higher among the weight- managed patients compared with new patients. Also, for boys there were no differences between both groups in PA performance. While, girls’ PA was significantly higher among the girls in weight- managed group compared with girls in new patients group. Weight-managed patients spend significantly less time on the computer and/or the Internet per day compared with new patients. After treatment, the mean BMI among the weight-managed patients slightly decreased. Conclusion: The study findings suggest that the weight-management program could be effective in treating Saudi obese adolescents due to its effect in BMI reduction and greater improvement in PA performance. The surprising result from this study, PA differences between the groups were because of the total PA of girls only, meaning that obesity treatment program can lower the percentage of obesity among women and increase their levels of physical activity.
基金Supported by the National Natural Science Foundation of China (91018009)the Fundamental Research Funds for the Central Universities (201121102020006)
文摘In order to verify requirements model/document the consistency between software and users＇ true minds, we present a software behavior-oriented requirements visualization method. The implementation method for software behavior-oriented requirements visualization is advanced in this paper first. Then, the basis language is introduced as the foundation of the method. At last, we put forward the tool platform that can achieve the requirement visualization, The result demonstrates that the method can generate requirement animation rapidly to check the correctness of the requirement. It can effectively reduce the requirements change and save a lot of software development costs.
