Numerical Simulation of Response of SRC Columns Subjected to Blast Loading

The dynamic characteristics and failure modes of steel reinforced concrete (SRC) columns subjected to blast loading are complicated because of the transient stress wave in the SRC columns and the interaction between steel and concrete. This paper presents a numerical simulation of the response of SRC columns subjected to blast loading using hydrocode LS-DYNA. In the numerical model, a sophisticate concrete material model (the Concrete Damage Model) is employed with consideration of the strain rate effect and the damage accumulation. An erosion technique is adopted to model the spalling process of concrete. The possible failure modes of SRC columns are evaluated. It is observed that the failure of SRC columns subjected to blast load can generally be classified into three modes, namely, a direct failure in concrete body due to the stress wave, a transverse shear failure near the support sections due to the high shear force, and a flexural failure pertaining to large local and global deformation of the reinforcing steel.     

Students' privacy concerns in learning analytics: Model development

Understanding students' privacy concerns is an essential first step toward effective privacy-enhancing practices in learning analytics (LA). In this study, we develop and validate a model to explore the students' privacy concerns (SPICE) regarding LA practice in higher education. The SPICE model considers privacy concerns as a central construct between two antecedents—perceived privacy risk and perceived privacy control, and two outcomes—trusting beliefs and non-self-disclosure behaviours. To validate the model, data through an online survey were collected, and 132 students from three Swedish universities participated in the study. Partial least square results show that the model accounts for high variance in privacy concerns, trusting beliefs, and non-self-disclosure behaviours. They also illustrate that students' perceived privacy risk is a firm predictor of their privacy concerns. The students' privacy concerns and perceived privacy risk were found to affect their non-self-disclosure behaviours. Finally, the results show that the students' perceptions of privacy control and privacy risks determine their trusting beliefs. The study results contribute to understand the relationships between students' privacy concerns, trust and non-self-disclosure behaviours in the LA context. A set of relevant implications for LA systems' design and privacy-enhancing practices' development in higher education is offered.

Practitioner notes

What is already known about this topic

• Addressing students' privacy is critical for large-scale learning analytics (LA) implementation.
• Understanding students' privacy concerns is an essential first step to developing effective privacy-enhancing practices in LA.
• Several conceptual, not empirically validated frameworks focus on ethics and privacy in LA.

What this paper adds

• The paper offers a validated model to explore the nature of students' privacy concerns in LA in higher education.
• It provides an enhanced theoretical understanding of the relationship between privacy concerns, trust and self-disclosure behaviour in the LA context of higher education.
• It offers a set of relevant implications for LA researchers and practitioners.

Implications for practice and/or policy

• Students' perceptions of privacy risks and privacy control are antecedents of students' privacy concerns, trust in the higher education institution and the willingness to share personal information.
• Enhancing students' perceptions of privacy control and reducing perceptions of privacy risks are essential for LA adoption and success.
• Contextual factors that may influence students' privacy concerns should be considered.

     

“中国制造2025”背景下智能制造人才培养服务平台构建研究

在"中国制造2025"背景下,一系列智能制造产业宏观政策出台,高职院校需要紧跟智能制造产业发展趋势,构建以智能工厂、工业机器人、精密测量和先进制造等智能环境为基础的人才培养平台,以满足新形势下政府、企业和学校对智能制造产业发展的需求。     

论美国新品格教育的"社群化"特征

20世纪80年代末以来在美国复兴的品格教育,其基本特征为"社群化",即以社会达至的道德共识作为教育内容,在学校构建道德社群,以作训练学生品格的教育环境,其目的在于解决美国当代青少年存在的极端个人主义等道德问题.美国新品格教育的"社群化"具有共识价值的统摄性、整合控制性和人为性等特征."道德教育社群化"可以理解为传统道德教育的特征,这对于分析我国整体主义道德教育模式具有重要理论价值.     

影响篮球运动员比赛的心理因素及调控方法

主要通过分析影响篮球运动员心理变化因素，进而提出几种心理训练方法．     

真空冷冻干燥过程生产率工艺优化的实验研究

采用二次正交试验设计实验方案,对胡萝卜进行了真空冷冻干燥实验,建立了单位面积生产率与冻干室压强、加热板温度和冻干厚度的二次回归数学模型,分析了过程参数对实验指标的影响特性,并由此得到了冻干生产率的优化参数.     

面向就业的美国职业群课程模式探析

美国职业群课程模式以经济发展和就业需求为本，旨在培养学生的就业弹性和职业适应能力。实现其终身职业生涯发展。它以职业群分类和职业途径为依据，构建有序的课程体系。在实施过程中注重为学生制定系统的学习计划、加强职业指导服务和广泛建立合作伙伴，并逐渐开展了基于职业技能标准的课程评估。当前，职业群课程模式在联邦和州政府的管理和支持下得到了普及和推广，但也存在一些亟待克服的困难和问题。     

面向21世纪土地资源管理专业的教学改革与发展

针对土地管理实际工作对人才需求的特点，结合土地资源管理专业教学实践的体会，对面向21世纪土地资源管理专业的教学改革与发展进行了探讨和研究，提出了有关教学改革的措施和发展建设要点。     

论写话训练与写作教学的有效衔接

要提高学生的写作能力,需要长时间的练习,这也是一个循序渐进的过程。小学低年级主要进行的是写话训练,到了三年级,才开始尝试写作。写话训练是写作的基础,两者之间有着必然的联系,需要有效进行衔接。教师要思考如何更好地进行写话训练,以有效对接写作教学。文章结合教学实践,对写话训练与写作教学有效衔接进行论述。     

教师专业发展与校本培训

教师专业发展是时代的要求,更是教育发展的必然趋势.在我国,基础教育课程改革,对教师专业化和专业发展,提出了迫切要求,为此,人们不断摸索教师成长和发展的规律,逐步认识到校本培训在教师专业发展上的作用,并通过校本培训推进教师专业发展.