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Why Cyclohexatriene (C6H6, pKa = 43) is Less Acidic than Cyclopentadiene (C5H6, pKa = 15) and Cycloheptatriene (C7H8, pKa = 36): A Freshmen Chemical Education Undergraduate Exercise 为什么环己三烯(C6H6, pKa = 43)比环戊二烯(C5H6, pKa = 15)和环庚三烯(C7H8, pKa = 36)的酸性更弱
Pub Date : 2023-01-17 DOI: 10.12691/wjce-11-1-1
S. Rachuru, D. A. Padmavathi, V. Jagannadham
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引用次数: 0
Biological Fuel Cells with Drugstore Products 生物燃料电池与药店产品
Pub Date : 2022-12-30 DOI: 10.12691/wjce-10-4-4
Rebecca Grandrath, Claudia Bohrmann‐Linde
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引用次数: 0
Teacher Motivation and Morale Influencing the Effectiveness of Bangkok Metropolitan Administration Schools 曼谷都市行政学校教师动机与士气影响效能
Pub Date : 2022-12-17 DOI: 10.5430/wje.v12n6p39
Juladis Khanthap
This study aimed to examine the teacher motivation and morale in Bangkok Metropolitan Administration schools, the school effectiveness, the relationship between the factors of teacher motivation and morale in performing their jobs that influence school effectiveness, and the development of guidelines for enhancing teacher motivation and morale in relation to school effectiveness. In the study, the researcher employed a mixed research methodology. In the initial phase, questionnaires were used to collect data. The population consisted of Bangkok Metropolitan Administration school teachers who served their duty in 2022. A multistage random sampling selected 375 persons in total. Mean, percentage, and standard deviation were applied as descriptive statistics. In the last phase, the researcher conducted in-depth interviews with seven experts selected through purposive sampling to gather their perspectives on the applicability, possibility, and usefulness of the the guidelines for enhancing teacher motivation and morale in relation to school effectiveness. The data was analyzed using a content analysis method. According to the findings, the multiple correlation coefficient was .760 (R = 0.760 at the .05 level of significance. The predictive coefficient or predictive power of 57.7 percent (R2 = 0.577), with the regression coefficient () arranged in descending order: 1) Professional Success (β=0.321) 2) Career Growth (β=0.238) 3) School Policies (β=0.162) 4) Workplace atmosphere and environment (β=0.102) 5) Governance Aspects (β=.096). The forecast equations can be generated using the regression coefficients of the predictors in raw score (b) and standard score () as follows: In raw score (unstandardized score) form, the forecast equation is Y' = 1.391 + 0.255 (x 6 )0.183 (x 10 x 10) 0.124 (x 5 (x 5 )0.050 (x 3 (x 3 )0.075 (x 2 (x 2). Standardized score forecast equations Zy = 0.321 (x 6) + 0.238 (x 10) + 0.162 (x 5) + 0.102 (x 3) + 0.096 (x 2). The researcher also devised a guideline containing nineteen recommendations for enhancing the top five teacher motivation and morale factors that influence school effectiveness. There are 19 guidelines for improving teacher morale, which affects school effectiveness.
本研究旨在探讨曼谷都市行政学校的教师动机与士气、学校效能、影响学校效能的教师动机与士气因素之间的关系,以及制定提高教师动机与士气与学校效能相关的指导方针。在这项研究中,研究人员采用了混合研究方法。在初始阶段,使用问卷调查来收集数据。人口中包括2022年履职的曼谷市厅学校教师。采用多阶段随机抽样,共选取375人。采用均值、百分比和标准差进行描述性统计。在最后阶段,研究者通过有目的的抽样对七位专家进行了深入的访谈,以收集他们对指导方针的适用性、可能性和有用性的看法,以提高教师的动机和士气与学校的有效性。采用内容分析法对数据进行分析。结果显示,多重相关系数为0.760 (R = 0.760,显著性水平为0.05)。预测系数或预测能力为57.7% (R2 = 0.577),回归系数()由高到低依次排列:1)职业成功(β=0.321) 2)职业发展(β=0.238) 3)学校政策(β=0.162) 4)工作氛围和环境(β=0.102) 5)治理方面(β= 0.096)。利用原始分数(b)和标准分数()中预测因子的回归系数,可以得到预测方程如下:在原始分数(unstandardized分数)形式,预测方程Y ' = 1.391 + 0.255 (x 6) 0.183 (0.124 x 10 x 10) (x 5 (x 5) 0.050 (2 x 3 (x 3) 0.075 (x (x 2)标准化分数预测方程Zy = 0.321 (x 6) + 0.238 (x 10) + 0.162 (x 5) + 0.102 (x 3) + 0.096 (x 2)。研究人员还设计了一个指导方针包含19建议加强前五名老师的动机和士气因素影响学校效能。提高教师士气的19条指导方针影响着学校的效率。
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引用次数: 0
The Effect of E-STEM Education on Students’ Perceptions and Engineering Design Process about Environmental Issues E-STEM教育对学生环境问题认知和工程设计过程的影响
Pub Date : 2022-12-17 DOI: 10.5430/wje.v12n6p49
Asli Koculu, Sefika Girgin
E-STEM (Environmental, Science, Technology, Engineering and Mathematics) refers to the integration environmental education into STEM education and can have important role on students’ understandings and engineering design process about environmental issues such as plant growth, acid rains, pollution, sustainable agriculture etc. since it engages students in real-world environmental problem-solving that integrates science, technology, engineering, and math. In this manner, the aim of this study was to investigate the effect of E-STEM Education on fifth grade students’ perceptions and their engineering design process about environmental issues. To reach this aim, a one-group pre- and post-test model was used. The research group of study is five 5th grade students at private school, Istanbul, Turkey. The data was collected with open-ended questions, focus group interview and researchers’ observation notes. In data analysis, students’ responses to open-ended questions were analyzed with content analysis and classified in terms of adequacy. Transcribed discussions from focus group interview and researchers’ observation notes were assessed based on Engineering Design Process Framework. As a result of the study, students’ perceptions and engineering design process about environmental issues improved through E-STEM Education.
E-STEM (Environmental, Science, Technology, Engineering and Mathematics,环境、科学、技术、工程和数学)是指将环境教育整合到STEM教育中,对学生对植物生长、酸雨、污染、可持续农业等环境问题的理解和工程设计过程具有重要作用,因为它让学生参与到整合科学、技术、工程和数学的现实环境问题解决中来。因此,本研究的目的是探讨E-STEM教育对五年级学生对环境问题的认知及其工程设计过程的影响。为了达到这一目的,采用了单组测试前和后模型。研究小组是土耳其伊斯坦布尔私立学校的5名5年级学生。数据收集采用开放式问题,焦点小组访谈和研究人员的观察笔记。在数据分析中,对学生对开放式问题的回答进行内容分析,并按充分性进行分类。根据工程设计过程框架对焦点小组访谈和研究人员观察笔记的讨论进行评估。研究的结果是,通过E-STEM教育,学生对环境问题的看法和工程设计过程得到了改善。
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引用次数: 1
Metaphor-Themed Studies in Social Studies Education in Turkey and Their Evaluations in Terms of Conceptual Metaphor Theory (CMT) 土耳其社会研究教育中的隐喻主题研究及其概念隐喻理论评价
Pub Date : 2022-12-12 DOI: 10.5430/wje.v12n6p24
E. Şenşekerci
The aim of the present study is to examine postgraduate theses and published articles on "analysis of metaphorically used words in discourse" in the field of social studies education in Turkey by document analysis method. Within the scope of the research, The National Thesis Center and Dergipark databases were surveyed. The survey revealed 22 completed theses and 39 published articles between the years of 2010 and 2022. First, the studies were analysed in terms of the study/publication year of the works, the universities where they were conducted, their sample/study groups, the methodological framework they were based on, their data collection tool, the expertise of the researchers and thesis advisors, and the metaphors that were the subject of the research. The works were subsequently evaluated in terms of CMT (Conceptual Metaphor Theory) and were subjected to five research questions. This evaluation revealed that the studies examined: (i) do not establish a relationship between their research findings and the theoretical framework of CMT although they view metaphors as products of conceptual thinking; (ii) do not benefit adequately from the essential references or seminal works of CMT; (iii) do not align themselves with a particular theory of metaphor or an approach, and, therefore, lack criteria for how they associate metaphor with thought; (iv) do not make explicit the criteria according to which they classified the statement of participants as metaphorical; and (v) try to reach the data suited to their research purpose with a data collection tool coded as "A is X like or as B", which is a coding scheme that is conventionally identified as a simile rather than a conceptual metaphor among CMT adherents.
本研究旨在运用文献分析法,检视土耳其社会研究教育领域有关“语篇隐喻使用词分析”的研究生论文及已发表文章。在研究范围内,调查了国家论文中心和Dergipark数据库。调查显示,从2010年到2022年,共有22篇论文完成,39篇论文发表。首先,这些研究是根据作品的研究/出版年份、进行研究的大学、样本/研究小组、所基于的方法框架、数据收集工具、研究人员和论文顾问的专业知识以及作为研究主题的隐喻进行分析的。这些作品随后被用概念隐喻理论(CMT)进行评价,并接受了五个研究问题。这一评价表明:(1)这些研究虽然将隐喻视为概念思维的产物,但并未将其研究结果与CMT理论框架建立联系;(ii)没有充分受益于CMT的重要参考文献或开创性作品;(iii)没有将自己与特定的隐喻理论或方法结合起来,因此缺乏将隐喻与思维联系起来的标准;(iv)没有明确将参与者的陈述归类为隐喻性的标准;(v)尝试使用编码为“a是X类或B类”的数据收集工具来获取适合其研究目的的数据,这种编码方案在CMT拥护者中通常被认为是明喻而不是概念隐喻。
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引用次数: 0
Experimental Teaching by Scientific Methods for Developing Students' Natural Finding Capacity in Teaching Natural Science in Vietnamese High Schools 在越南高中自然科学教学中运用科学方法进行实验教学,培养学生的自然发现能力
Pub Date : 2022-12-12 DOI: 10.5430/wje.v12n6p1
Phạm Thị Hồng Tú, Nguyen Thi Hang, Luong Thi Thuy Van, Ha Van Dung, Nguyen Thi Huynh Nga, Cao Xuan Phan
Natural science itself is an experimental science, so practice and experimentation are important and are typical teaching methods of this subject. To make practice and experiment play the highest strengths in teaching and developing the ability to learn about nature - one of the three specific competencies of natural science, the association of experiments with scientific methods plays a special role. This article presents the general problems of teaching practical experiments according to the scientific method and applying it in teaching the topic “Living animals” in Natural Science, grade 7. The research results can be teachers’ references in teaching Natural Science to meet the teaching objectives in the direction of developing students' capacity in Vietnam in the current period.
自然科学本身是一门实验科学,实践和实验是自然科学教学的重要内容,也是自然科学教学的典型方法。要使实践和实验在教学和培养自然科学三大能力之一的自然认识能力中发挥最大的优势,实验与科学方法的结合就具有特殊的作用。本文介绍了运用科学方法进行实践实验教学的一般问题,并将其应用于七年级自然科学课程“活体动物”的教学。研究结果可供越南教师在自然科学教学中参考,以满足现阶段学生能力发展方向的教学目标。
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引用次数: 0
The Perspective of Principals of all Teachers being Leaders 全师领导的校长观
Pub Date : 2022-12-12 DOI: 10.5430/wje.v12n6p9
L. Nadelson, Michael J. Turley, Daniella DiMasso-Shininger
Building on the research about assessing teachers’ leader identity, we were curious to understand how K-12 school principals perceive teachers as leaders. We used a survey research design to gather quantitative and qualitative data from K-12 school principals. We could not find any extant surveys aligned with our research focus; thus, we designed and validated a survey for our research. We contacted 1042 K-12 principals from the south-central region of the US; 70 responded by completing our survey. Analysis indicated a potential misalignment in principal leadership styles between the ideal attributes of leadership and contextual or practical applications of leadership. Additional analysis revealed considerable overlap between the principals’ perceptions of leadership and the roles of teachers; however, those leadership roles aligned with teachers as school-level leaders outside the classroom rather than in their role of teaching students. Findings also revealed an alignment of principals’ perceptions of teachers as leaders with principals’ efforts to develop teachers as leaders. Overall, our research suggests that principals support teachers' development as leaders. We close with a discussion of the results and implications for research and practice.
在评估教师领导身份的研究基础上,我们很想了解K-12学校校长是如何将教师视为领导者的。我们采用调查研究设计收集K-12学校校长的定量和定性数据。我们找不到任何与我们的研究重点一致的现存调查;因此,我们为我们的研究设计并验证了一个调查。我们联系了1042名来自美国中南部地区的K-12校长;70人完成了我们的调查。分析表明,在领导的理想属性与领导的情境或实际应用之间,主要领导风格存在潜在的不一致。进一步的分析显示,校长对领导的看法与教师的角色有相当大的重叠;然而,这些领导角色与教师在课堂之外的学校层面的领导者一致,而不是他们教学学生的角色。调查结果还显示,校长对教师作为领导者的看法与校长培养教师作为领导者的努力是一致的。总体而言,我们的研究表明校长支持教师作为领导者的发展。我们以讨论结果和对研究和实践的影响作为结束。
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引用次数: 0
Methylene Blue - New Chemistry Experiments for University Education 亚甲基蓝——大学教育新化学实验
Pub Date : 2022-11-29 DOI: 10.12691/wjce-10-4-3
P. Wagler, J. Scheible, A. Habekost
The redox reactions of methylene blue on screen printed electrodes (SPEs) can be measured electrochemically by cyclic voltammetry (CV) and spectroscopically by optical and Raman spectroscopy. The combination of cyclic voltammetry and optical or Raman spectroscopy, known as absorpto- or Raman voltammetry, provides not only electrochemical information about redox reactions at electrodes, but also about changes in the visible and Raman properties of the substances used. Raman scattering can be enhanced by a simple electrochemical in-situ modification; this leads to an electrochemically activated surface enhanced Raman effect (EC-SERS). Therefore, chemical reactions, based on the change in vibrational states of the substances under investigation, can be characterized in a very simple way. In this article, we compare different electrodes and show that the electrochemical reactions of methylene blue strongly depend on the electrodes used. In addition, the electropolymerization of methylene blue is discussed. At the end of the article, a script for students for measuring the spectroelectrochemistry of methylene blue is presented in detail. The didactic background is that the combination of electrochemical information, such as potentials and current fluxes, with spectroscopic information, such as absorption and/or vibrational changes, leads to a better understanding of electrochemistry.
亚甲基蓝在丝网印刷电极(SPEs)上的氧化还原反应可以用循环伏安法(CV)和光谱法(光学和拉曼光谱)进行电化学测量。循环伏安法和光学或拉曼光谱的结合,被称为吸收伏安法或拉曼伏安法,不仅提供了电极氧化还原反应的电化学信息,而且还提供了所用物质的可见光和拉曼性质的变化。通过简单的电化学原位修饰可以增强拉曼散射;这导致了电化学活化表面增强拉曼效应(EC-SERS)。因此,基于所研究物质的振动状态变化的化学反应,可以用一种非常简单的方式来表征。在本文中,我们比较了不同的电极,并表明亚甲基蓝的电化学反应强烈地依赖于所使用的电极。此外,还讨论了亚甲基蓝的电聚合反应。在文章的最后,详细介绍了一个供学生使用的亚甲基蓝光谱电化学测量脚本。教学背景是电化学信息(如电位和电流通量)与光谱信息(如吸收和/或振动变化)的结合,可以更好地理解电化学。
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引用次数: 1
Improvement of Accuracy and Precision during Simple Distillation of Ethanol-Water Mixtures 乙醇-水混合物简单蒸馏准确度和精密度的提高
Pub Date : 2022-10-30 DOI: 10.12691/wjce-10-4-2
Kyeongseok Oh, B. Kang, Joo-Il Park
The simple distillation of ethanol-water mixture is a well-known experimental subject in either general chemistry laboratory or organic chemistry laboratory. The objective is to provide a reliable guidance for college students who are major in chemistry or chemical engineering to obtain repeatable results during the simple distillation of ethanol-water mixture. The liquid-vapor phase diagram of ethanol-water mixtures was introduced before experiment. As similar to a tradition distillation assembly, Liebig condenser, specific gravity hydrometer set, and heating mantle were mainly employed to perform the experiment of a simple distillation with minor but critical changes. The examination of diverse results in distillate amounts and distillate ethanol concentrations were analyzed by Rayleigh equation. The simple distillation was evaluated at the assigned temperature that was selected from liquid-vapor phase diagram. Even though the first evaporation started at a temperature below the theoretical bubble point shown in liquid-vapor phase diagram in most cases, the set temperature was gradually adjusted and maintained until no more vapor generated. In fact, this work motivates students to design their simple distillation plans through changing initial ethanol concentration and set temperature. The experimental data from 23 groups suggest that the accuracy and the precision were dependent upon how to control heating rates and to sustain set temperature in this work.
乙醇-水混合物的简单蒸馏是普通化学实验室或有机化学实验室中众所周知的实验课题。目的是为化学或化工专业的大学生在乙醇-水混合物的简单蒸馏过程中获得可重复的结果提供可靠的指导。实验前介绍了乙醇-水混合物的液气相图。与传统的蒸馏装置类似,主要采用李比希冷凝器、比重比重计组和加热套进行简单蒸馏实验,但变化不大,但很关键。用瑞利方程分析了不同馏分量和馏分乙醇浓度的检验结果。在从液气相图中选择的指定温度下对简单蒸馏进行了评价。即使在大多数情况下,第一次蒸发的温度低于液-气相图中所示的理论泡点,但设定的温度会逐渐调整并保持,直到不再产生蒸汽。事实上,这项工作激励学生通过改变初始乙醇浓度和设定温度来设计简单的蒸馏方案。来自23组的实验数据表明,在这项工作中,准确度和精度取决于如何控制加热速率和维持设定温度。
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引用次数: 0
The Psychological and Environmental Variables related to Intellectual Extremism from the Perspective of Secondary School Teachers and Students 中学师生视角下与智力极端主义相关的心理与环境变量
Pub Date : 2022-10-18 DOI: 10.5430/wje.v12n5p49
Mohamed Hawal Alotaibi
The study aimed to identify the most important psychological and environmental variables related to intellectual extremism from the perspective of secondary school students and their teachers in Afif Governorate, Saudi Arabia. The sample of the study consisted of (350) secondary school students (200 males and 150 females) and (252) male and female secondary school teachers from Afif Governorate, in the academic year 1440/1441 H. The researcher used the descriptive method, as well as the scale of psychological and environmental variables towards intellectual extremism in secondary school prepared by him. The results of the study showed that there are no significant statistical differences in the psychological and environmental variables in its four dimensions that are associated with intellectual extremism among secondary school students from the point of view of the teachers due to the gender (male teacher- female teacher) and specialization variables except for the cognitive dimension in relation to the scientific specialization, and it showed statistically significant differences with regard to the more than ten years’ experience variable except with the environmental effects.
该研究旨在从沙特阿拉伯阿菲夫省的中学生及其教师的角度确定与智力极端主义相关的最重要的心理和环境变量。本研究的样本包括来自Afif省1440/1441 h学年的(350)名中学生(200男150女)和(252)名男女中学教师。研究者采用描述性方法,以及他编制的中学智力极端主义心理和环境变量量表。研究结果显示,从教师的角度来看,与中学生智力极端主义相关的四个维度的心理和环境变量,除与科学专业化相关的认知维度外,在性别(男教师-女教师)和专业化变量方面,没有显著的统计差异;在统计上,除了环境的影响,在超过十年的经验变量上有显著的差异。
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引用次数: 0
期刊
World Journal of Chemical Education
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