Assessment exercises constitute a crucial component of the teaching and learning process,serving the purpose of gauging the degree to which learning objectives have been accomplished.This study aims to assess the math...Assessment exercises constitute a crucial component of the teaching and learning process,serving the purpose of gauging the degree to which learning objectives have been accomplished.This study aims to assess the mathematics performance of Grade 7 learners using the 50-30-20 exercise.Specifically,this study seeks to determine the learners’pre-test and post-test mean scores,identify significant differences between the pre-test and post-test results,evaluate learners’exercises,and propose enhanced exercises.The research employs a quasi-experimental design,with 40 Grade 7 learners in the school year 2023-2024 as participants,selected through purposive non-random sampling.Statistical data analysis involves the use of mean,standard deviation,paired t-test,and Cohen’s D effect size.Ethical considerations were paramount,as evidenced by a letter of authorization from the school head outlining the strict adherence to voluntary participation,informed parental consent,anonymity,confidentiality,risk mitigation,results-sharing protocols,and the commitment to keeping research data confidential.The data yielded a remarkable outcome:the experimental group exhibited improvement in both the pre-test and post-test.This result substantiates the initial objective of the study,showcasing a noteworthy and favorable performance among the participants.Consequently,it suggests that a majority of the participants strongly agree that the 50-30-20 exercises contribute to enhancing their understanding and problem-solving skills,as well as their ability to grasp mathematical concepts and improve their overall performance in mathematics.Therefore,the 50-30-20 exercises not only facilitated students in understanding mathematics lessons but were also aligned with the Department of Education’s development plan.展开更多
Reading is one of the four basic skills of English learning, and it is also regarded as one efficient means to take in scientific and technological information in this age of knowledge explosion. The selection of read...Reading is one of the four basic skills of English learning, and it is also regarded as one efficient means to take in scientific and technological information in this age of knowledge explosion. The selection of reading materials should base on the learners’ need and cognitive ability, meanwhile the readability and feasibility of the reading materials lead to the effectiveness of reading. As far as it is concerned, different theorists hold different opinions, sometimes even diametrically opposed views. Some theorists reject the value of researches on reading materials while other theorists hold that the issue on reading materials should not be avoided in the research of effective reading. As the selection of reading materials should be based on traditional teachers’ experience or learners’ need, theorists had diverse voices. Taking all as a point of departure, the author investigated the origin of the problem, and believed that the selection of reading materials should take learners’ need in consideration, and focused on learners’ reading need and ability.展开更多
For many years,people have been exploring different kinds of teaching pattern of triggering the students' interests in English and enhancing the efficiency of teaching and have been seeking different kinds of appr...For many years,people have been exploring different kinds of teaching pattern of triggering the students' interests in English and enhancing the efficiency of teaching and have been seeking different kinds of approaches of optimizing the process of class teaching.So many English class teaching methods such as five-step teaching method and task-based teaching method are put forward,but these methods pay more attention to imparting new knowledge to students and to training their ability of using English than to triggering their interests in English.This article try to solve this problem by exploring different ways of lead-in in English classroom teaching to arouse students'interests in English learning.展开更多
Teaching materials play a very significant role in English teaching and learning. They serve to exemplify and embody the goal and content of a certain curricula and also act as major tools for teachers and students to...Teaching materials play a very significant role in English teaching and learning. They serve to exemplify and embody the goal and content of a certain curricula and also act as major tools for teachers and students to carry out all kinds of activities.展开更多
Accompanying the arrival of new technological and network ear, SACs （self-access centers） become the most widely adopted mode spreading in China with a large quantity of universities joining to follow the fashion. B...Accompanying the arrival of new technological and network ear, SACs （self-access centers） become the most widely adopted mode spreading in China with a large quantity of universities joining to follow the fashion. But whether the SACs in China can fully fulfill the purpose, to what extend can learners gain benefits to develop autonomy, and what are the possible ways for improvement are quite necessary to investigate since there starts to emerge various problems during the implementation of SACs. This paper aims to analyze the prevalent establishment of SACs in China in order to find out the reasons for prevalence, the current implementing mode, the degree of effectiveness on developing learner autonomy, especially potential problems and causes, and finally put forward some suggestions pedagogical implications for improving.展开更多
The detection of very high energy γ-ray emission from the Galactic center has been reported by four independent groups. One of these γ-ray sources, the 10 TeV -γ-ray radiation reported by HESS, has been suggested a...The detection of very high energy γ-ray emission from the Galactic center has been reported by four independent groups. One of these γ-ray sources, the 10 TeV -γ-ray radiation reported by HESS, has been suggested as having a hadronic origin when relativistic protons are injected into and interact with the dense ambient gas. Assuming that such relativistic protons required by the hadronic model come from the tidal disruption of a star by the massive black hole of Sgr A＊, we explore the spectrum of the relativis- tic protons. In the calculations, we investigate cases where different types of stars are tidally disrupted by the black hole of Sgr A＊, and we consider that different diffusion mechanisms are used for the propagation of protons. The initial energy distribution of the injected spectrum of protons is assumed to follow a power-law with an exponential cut-off, and we derive the different indices of the injected spectra for the tidal disruption of different types of stars. For the best fit to the spectrum of photons detected by HESS, the spectral index of the injected relativistic protons is about 2.05 when a red giant is tidally disrupted by the black hole of Sgr A＊ and the diffusion mechanism is the Effective Confinement of Protons.展开更多
By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we...By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we make aspecial study about centering- point curve and circling- point curve and couplercurves based on Ball’s points.展开更多
This paper aims to investigate self-access centers'effects on college English learning. Data, collected in the form of questionnaires and interview, were analyzed. Results demonstrate that the self-access center(S...This paper aims to investigate self-access centers'effects on college English learning. Data, collected in the form of questionnaires and interview, were analyzed. Results demonstrate that the self-access center(SAC)does help students to promote learner autonomy, lower their anxiety and encourage their interest in college English learning.展开更多
Tunable color center lasers making use of electron trapping defects such as F A and F + 2 like centers in alkali halide crystals can deliver broadly tunable power over the near infrared 0.8—4.0μm range.The tunable r...Tunable color center lasers making use of electron trapping defects such as F A and F + 2 like centers in alkali halide crystals can deliver broadly tunable power over the near infrared 0.8—4.0μm range.The tunable range and their impressive feature of narrow linewidth make these solid state lasers important to molecular spectroscopy,pollution detection,fiber optics communication and other scientific research fields.The( F + 2) H center consisting of an F + 2 center and an neibouring O 2- ion,is one of the most important color centers.In this paper,we will study the preparation,absorption and emission spectra of the ( F + 2) H center in mixed crystal KCl KBr∶OH -. Single crystals of KCl,KBr and different compositions of KCl x Br 1-x solid solutions are growtn with 0.1mol%—0.3mol% KOH in the melt by the Czochralski technique in air.展开更多
文摘Assessment exercises constitute a crucial component of the teaching and learning process,serving the purpose of gauging the degree to which learning objectives have been accomplished.This study aims to assess the mathematics performance of Grade 7 learners using the 50-30-20 exercise.Specifically,this study seeks to determine the learners’pre-test and post-test mean scores,identify significant differences between the pre-test and post-test results,evaluate learners’exercises,and propose enhanced exercises.The research employs a quasi-experimental design,with 40 Grade 7 learners in the school year 2023-2024 as participants,selected through purposive non-random sampling.Statistical data analysis involves the use of mean,standard deviation,paired t-test,and Cohen’s D effect size.Ethical considerations were paramount,as evidenced by a letter of authorization from the school head outlining the strict adherence to voluntary participation,informed parental consent,anonymity,confidentiality,risk mitigation,results-sharing protocols,and the commitment to keeping research data confidential.The data yielded a remarkable outcome:the experimental group exhibited improvement in both the pre-test and post-test.This result substantiates the initial objective of the study,showcasing a noteworthy and favorable performance among the participants.Consequently,it suggests that a majority of the participants strongly agree that the 50-30-20 exercises contribute to enhancing their understanding and problem-solving skills,as well as their ability to grasp mathematical concepts and improve their overall performance in mathematics.Therefore,the 50-30-20 exercises not only facilitated students in understanding mathematics lessons but were also aligned with the Department of Education’s development plan.
文摘Reading is one of the four basic skills of English learning, and it is also regarded as one efficient means to take in scientific and technological information in this age of knowledge explosion. The selection of reading materials should base on the learners’ need and cognitive ability, meanwhile the readability and feasibility of the reading materials lead to the effectiveness of reading. As far as it is concerned, different theorists hold different opinions, sometimes even diametrically opposed views. Some theorists reject the value of researches on reading materials while other theorists hold that the issue on reading materials should not be avoided in the research of effective reading. As the selection of reading materials should be based on traditional teachers’ experience or learners’ need, theorists had diverse voices. Taking all as a point of departure, the author investigated the origin of the problem, and believed that the selection of reading materials should take learners’ need in consideration, and focused on learners’ reading need and ability.
文摘For many years,people have been exploring different kinds of teaching pattern of triggering the students' interests in English and enhancing the efficiency of teaching and have been seeking different kinds of approaches of optimizing the process of class teaching.So many English class teaching methods such as five-step teaching method and task-based teaching method are put forward,but these methods pay more attention to imparting new knowledge to students and to training their ability of using English than to triggering their interests in English.This article try to solve this problem by exploring different ways of lead-in in English classroom teaching to arouse students'interests in English learning.
文摘Teaching materials play a very significant role in English teaching and learning. They serve to exemplify and embody the goal and content of a certain curricula and also act as major tools for teachers and students to carry out all kinds of activities.
文摘Accompanying the arrival of new technological and network ear, SACs （self-access centers） become the most widely adopted mode spreading in China with a large quantity of universities joining to follow the fashion. But whether the SACs in China can fully fulfill the purpose, to what extend can learners gain benefits to develop autonomy, and what are the possible ways for improvement are quite necessary to investigate since there starts to emerge various problems during the implementation of SACs. This paper aims to analyze the prevalent establishment of SACs in China in order to find out the reasons for prevalence, the current implementing mode, the degree of effectiveness on developing learner autonomy, especially potential problems and causes, and finally put forward some suggestions pedagogical implications for improving.
基金funded by the National Natural Science Foundation of China (Grant Nos. 10873015, 10778716, 10573021, 10778064, 10673001 and 10433010)the National Basic Research Program of China (Grant 2009CB824800)
文摘The detection of very high energy γ-ray emission from the Galactic center has been reported by four independent groups. One of these γ-ray sources, the 10 TeV -γ-ray radiation reported by HESS, has been suggested as having a hadronic origin when relativistic protons are injected into and interact with the dense ambient gas. Assuming that such relativistic protons required by the hadronic model come from the tidal disruption of a star by the massive black hole of Sgr A＊, we explore the spectrum of the relativis- tic protons. In the calculations, we investigate cases where different types of stars are tidally disrupted by the black hole of Sgr A＊, and we consider that different diffusion mechanisms are used for the propagation of protons. The initial energy distribution of the injected spectrum of protons is assumed to follow a power-law with an exponential cut-off, and we derive the different indices of the injected spectra for the tidal disruption of different types of stars. For the best fit to the spectrum of photons detected by HESS, the spectral index of the injected relativistic protons is about 2.05 when a red giant is tidally disrupted by the black hole of Sgr A＊ and the diffusion mechanism is the Effective Confinement of Protons.
文摘By means of programs GTMPAC based- on generalized triangle method,analysis and synthesis of mechanism design in accordance with absolutely graphicalmethod( absolutely germetrical method) are developed.In this paper,we make aspecial study about centering- point curve and circling- point curve and couplercurves based on Ball’s points.
文摘This paper aims to investigate self-access centers'effects on college English learning. Data, collected in the form of questionnaires and interview, were analyzed. Results demonstrate that the self-access center(SAC)does help students to promote learner autonomy, lower their anxiety and encourage their interest in college English learning.
文摘Tunable color center lasers making use of electron trapping defects such as F A and F + 2 like centers in alkali halide crystals can deliver broadly tunable power over the near infrared 0.8—4.0μm range.The tunable range and their impressive feature of narrow linewidth make these solid state lasers important to molecular spectroscopy,pollution detection,fiber optics communication and other scientific research fields.The( F + 2) H center consisting of an F + 2 center and an neibouring O 2- ion,is one of the most important color centers.In this paper,we will study the preparation,absorption and emission spectra of the ( F + 2) H center in mixed crystal KCl KBr∶OH -. Single crystals of KCl,KBr and different compositions of KCl x Br 1-x solid solutions are growtn with 0.1mol%—0.3mol% KOH in the melt by the Czochralski technique in air.
