脉冲电晕法处理含苯废气实验研究

挥发性有机物(VOCs)的污染与控制技术日益受到重视。近年来发展起来的非平衡等离子体技术在治理VOCs方面已初步显示其独特的技术优势,现已成为废气治理研究领域中的前沿热点课题之一。等离子体法降解VOCs的机理较为复杂,研究不同线路对VOCs降解过程的影响意义重大。采用脉冲电晕放电等离子体技术,建立了混合电晕、有机电晕、空气电晕和分别电晕4种不同的实验方案,选取苯为代表物质进行实验研究,在初始浓度、停留时间和电源参数等一定的条件下,考察脉冲电压对苯去除率的影响。结果表明,电压为140kV、混合电晕时苯的去除率达到82.73%,脉冲电晕技术处理低浓度有机废气效果较好。     

转变观念加强培训建设一流实验队伍

实验队伍作为实验室建设和发展的中坚力量,是实验室建设和管理的关键因素,加强实验队伍建设是建设一流实验室的重要保证.从4个方面分析、讨论了目前高校实验队伍中存在的一些问题,并提出从"转变观念"、"优化结构"、"完善体制"、"加强培训"等几方面加强实验队伍建设、提高整体素质的改革建议和举措.     

Together I Can! Joint Attention Boosts 3- to 4-Year-Olds’ Performance in a Verbal False-Belief Test

Effects of joint attention were addressed on 3- to 4-year-olds’ performance in a verbal false-Belief Test (FBT), featuring the experimenter as co-watcher rather than narrator. In two experiments, children (N = 183) watched a filmed-FBT jointly with a test leader, disjointed from a test leader, or alone. Children attending jointly with a test leader were more likely to pass the FBT compared with normative data and to spontaneously recall information indicating false-belief understanding, suggesting that joint attention strengthens the plausibility of the FBT and renders plot-critical information more salient. In a third experiment (N = 59), results were replicated using a typical, image-based FBT. Overall findings highlight the profound impact of experimenter as social context in verbal FBTs, and link recall of specific story features to false-belief understanding.     

Changing roles in sustaining successful charter school leadership in high poverty schools: Voices from the field

Effective educational leadership is essential for the success of schools and ultimately student achievement. The impact of school leadership may be even more pronounced in charter schools. Due to current and unprecedented growth, unique design, and complexities of political, financial, and governance issues they face, there is a need for more highly qualified charter school leaders and perhaps even “differently” prepared leaders. In this qualitative study, the authors documented the characteristics and skills of two successful, sustained charter school leaders who retrospectively described their evolved and evolving roles over twenty five years. Each transformed high-poverty, low-performing schools with at-risk populations and led with vision, passion, and a relentless desire to positively influence their organizations and ultimately improve student success in their communities. Although many of their skills and characteristics fall within existing theories, such as situational leadership, transformational leadership, and distributive leadership, they embodied a level of dedication and commitment to the original communities in which they founded charters lasting over a quarter of a century. The findings suggest that founding a charter school and seeing it through to success over time may more closely resemble missionary work than traditional school leadership.     

Effects of an Educational Film About Body Donors on Students' Empathy and Anxiety Levels in Gross Anatomy

While most German anatomy institutes provide only limited information about body donors and their lives, students have expressed a desire to learn more about these individuals, especially about their motivations to donate their bodies for the sake of medical education. In order to gratify this wish, as well as to further humanize body donors, an educational film was compiled, and a study designed to capture the film's effects on medical students. This is the first study using standardized, validated psychological tools to evaluate the impact of an educational film about body donors on students’ empathy and psychological stress levels. The study followed a longitudinal, controlled, and cluster randomized design, including 77 (48 females/29 males) participants who watched the video either before, midway, or after the dissection course. Questionnaires were completed at four points in time applying the Jefferson Scale for Empathy (JSPE-S) and the Interpersonal Reactivity Index (IRI) to measure empathy. Psychological stress levels were recorded by the Brief Symptom Inventory (BSI). Overall, students recommended the film to be shown to all students (median 6.0; maximum on the six-point Likert scale). Viewing the film revealed no significant changes between study groups or over time in JSPE-S sum scores. All groups demonstrated a significant reduction of BSI values before the dissection course actually started and increased values during the course, but both developments appeared not to be associated with the intervention. Overall, the educational film did not correlate with any negative effects on students’ empathy and psychological stress levels, and it was strongly approved of by students, as it provided more humanizing personal information about body donors without violating their anonymity.     

The Role of Anatomy Computer-Assisted Learning on Spatial Abilities of Medical Students

Currently, medical education context poses different challenges to anatomy, contributing to the introduction of new pedagogical approaches, such as computer-assisted learning (CAL). This approach provides insight into students' learning profiles and skills that enhance anatomy knowledge acquisition. To understand the influence of anatomy CAL on spatial abilities, a study was conducted. A total of 671 medical students attending Musculoskeletal (MA) and Cardiovascular Anatomy (CA) courses, were allocated to one of three groups (MA Group, CA Group, MA + CA Group). Students' pre-training and post-training spatial abilities were assessed through Mental Rotations Test (MRT), with scores ranging between 0-24. After CAL training sessions, students' spatial abilities performance improved (9.72 ± 4.79 vs. 17.05 ± 4.57, P < 0.001). Although male students in both MA Group and CA Group show better baseline spatial abilities, no sex differences were found after CAL training. The improvement in spatial abilities score between sessions (Delta MRT) was correlated with Musculoskeletal Anatomy training sessions in MA Group (r = 0.333, P < 0.001) and MA + CA Group (r = 0.342, P < 0.001), and with Cardiovascular Anatomy training sessions in CA Group (r = 0.461, P = 0.001) and MA + CA Group (r = 0.324, P = 0.001). Multiple linear regression models were used, considering the Delta MRT as dependent variable. An association of Delta MRT to the amount of CAL training and the baseline spatial abilities was observed. The results suggest that CAL training in anatomy has positive dose-dependent effect on spatial abilities.     

弗莱雷成人教育思想及其对我国西部农村成人教育的启示

弗莱雷毕生致力于成人教育,他的成人教育思想一直广为流传。本文试图从成人教育的目的、内容、方法等三个方面进行描述,并探索其对我国西部农村成人教育的启示。     

基于SPI协议的音频解码芯片VS1003的读写机制及实现方法

介绍了一种基于SPI协议的音频解码芯片VS1003,详细介绍了VS1003芯片的读写机制,并给出了VS1003与单片机LPC2131的接口电路图,重点介绍了如何采用VS1003的SCI和SDI实现与LPC2131通信的软件流程图。     

面向经济全球化的中国生态环境建设

经济全球化对参与其中的国家,尤其是对发展中国家生态环境的“负面效应”越来越明显。中国在经济全球化体系中既获得了高速发展的机遇,取得了巨大的经济效益和国际效应,但生态环境也在被加速破坏着。人与自然的和谐是构建社会主义和谐社会的基本条件之一,在经济全球化进程中,应趋利避害,提高环境保护意识,走可持续发展之路。     

双线制高等教育制度建设与高等职业教育发展

职业教育与普通教育并行发展的双线制高等教育体系是符合高等教育大众化发展趋势的教育体系。目前国家对高等教育财政投入总量的不足,及高等教育内部的管理体制所导致的教育财政资源配置上偏向普通教育,双线制高等教育管理机构的不健全等,造成了高等职业教育和普通高等教育发展的失衡。因而,优化配置高等教育财政资源、合理规划教育体系内部结构对促进双线制高等教育发展有着重要的推进作用。