The communicative competences of students and teachers in different levels of education in North Cyprus

This study was conducted in order to determine the beliefs of students and teachers in different levels of education about their communicative competences. The study group of this research is consisted of 600 secondary school, high school and undergraduate students and 41 of their teachers. In this study, it is observed that not a significant correlation at a considerable degree exists in the communicative competences of students with their teachers, who are from different nationalities, gender and levels. Furthermore, regarding students, educated at different levels, no relation has been observed in their communicative competences with their teachers. Moreover, while students consider their communicative competences with their teachers to be moderately adequate, teachers consider their communicative competences with their students to be adequate in general.     

近五年来档案馆功能与模式转换研究综述

随着时代的发展,档案馆的功能得到了扩展和深化,同时也改变了档案馆的运行模式.本文对档案馆特征、档案馆功能转换等方面的研究进行归纳与分析,并提出了一些自己的认识.     

公共档案馆事业的发展与政府责任的考量

论述公共档案馆事业的发展与政府责任之间的关系,阐述了政府在公共档案馆事业发展中应该承担价值定位的责任、法律供给的责任、教育完善的责任、经济保障的责任.     

Detection of replay attacks in cyber-physical systems using a frequency-based signature

This paper proposes a frequency-based approach for the detection of replay attacks affecting cyber-physical systems (CPS). In particular, the method employs a sinusoidal signal with a time-varying frequency (authentication signal) into the closed-loop system and checks whether the time profile of the frequency components in the output signal are compatible with the authentication signal or not. In order to carry out this target, the couplings between inputs and outputs are eliminated using a dynamic decoupling technique based on vector fitting. In this way, a signature introduced on a specific input channel will affect only the output that is selected to be associated with that input, which is a property that can be exploited to determine which channels are being affected. A bank of band-pass filters is used to generate signals whose energies can be compared to reconstruct an estimation of the time-varying frequency profile. By matching the known frequency profile with its estimation, the detector can provide the information about whether a replay attack is being carried out or not. The design of the signal generator and the detector are thoroughly discussed, and an example based on a quadruple-tank process is used to show the application and effectiveness of the proposed method.     

Job aids and performance support: Moving from knowledge in the classroom to knowledge everywhere by Allison Rossett,and Lisa Schafer

Allison Rossett, CPT, teaches at San Diego State University and is equally at home in the consulting world, where she has helped a global mix of companies and other organizations. Lisa Schafer is one of the principals in Collet and Schafer, which focuses on performance improvement in Fortune 100 companies. Job Aids and Performance Support: Moving from Knowledge in the Classroom to Knowledge Everywhere (ISBN 978‐0‐7879‐7621‐7) is published by Jossey‐Bass/Pfeiffer. This publisher may be reached at (800) 274‐4434 (phone) or (800) 569‐0443 (fax).     

未受控制的高血糖对2型糖尿病患者粘附分子的影响（英文）

目的:评估可溶性血管细胞间黏附分子(s VCAM-1)、可溶性细胞间黏附分子(s ICAM-1)、可溶性选择素E和可溶性血栓调节蛋白在血糖控制良好和不受控制的2型糖尿病患者中的水平。创新点:对2型糖尿病患者的血管内皮炎症标记物进行评估。方法:62例糖尿病患者分成两组:第一组包括35个血糖控制良好的糖尿病患者,第二组包括27个未控制血糖并伴有微蛋白尿的糖尿病患者。对照组由25名健康志愿者组成。测定血浆中s VCAM-1、s ICAM-1、可溶性选择素E和可溶性血栓调节蛋白的浓度,同时测定血清肌酐及血浆中空腹血糖和糖化血红蛋白(Hb A1c)的浓度。结论:与血糖控制良好的糖尿病组相比,未控制血糖组具有相对低的ICAM-1水平和更高的VCAM-1水平。未控制血糖组中患者的糖化血红蛋白和ICAM-1之间呈正相关,肾小球滤过率和可溶性选择素E之间呈正相关,而肌酐和ICAM-1之间呈负相关。研究证实2型糖尿病的发病机理中炎症过程的出现与血管内皮功能受损有关。未受控制的高血糖对粘附分子的反向作用表明,在糖尿病的并发症中VCAM-1和ICAM-1具有不同功能。     

多媒体课件应用于化学实验教学的探索

1 多媒体技术在教学改革中的作用 几个世纪以来,各国教育家都在不断地致力于教学改革,从17世纪欧洲开始的KK班级授课方式到20世纪初的分组教学,道尔顿制、弹性制、文纳特卡制等改革实践,都力图改进传统的教学方式,寻求一种既能提高教学效率,又能培养独立学习能力和个性才能的途径.多媒体技术的蓬勃发展,为实现这一目标提供了可能[1].     

“There is One Geometry and in Each Case There is a Different Formula”

In this paper, we analyze two episodes from an inquiry-based didactical research; the complete analysis of our research data is still ongoing. By taking into consideration various developments from the history of the geometry of space-time, our general aim is to explore high school students’ conceptions about measurement of length and time in relatively moving systems, and lead the students to reconsider these conceptions in an attempt of constructing a new metric for space-time. The episodes are extracted from long (focused) interviews with two couples of students, based on a carefully designed fictional scenario. Two main strategies have been identified and are analyzed in the paper: one of them relies on imagination and intuition; the other one makes use of preexisting school mathematical knowledge, in arriving to a simplified formula of a Minkowskian metric.