Markov Chain Monte Carlo in small worlds

As the number of applications for Markov Chain Monte Carlo (MCMC) grows, the power of these methods as well as their shortcomings become more apparent. While MCMC yields an almost automatic way to sample a space according to some distribution, its implementations often fall short of this task as they may lead to chains which converge too slowly or get trapped within one mode of a multi-modal space. Moreover, it may be difficult to determine if a chain is only sampling a certain area of the space or if it has indeed reached stationarity. In this paper, we show how a simple modification of the proposal mechanism results in faster convergence of the chain and helps to circumvent the problems described above. This mechanism, which is based on an idea from the field of “small-world” networks, amounts to adding occasional “wild” proposals to any local proposal scheme. We demonstrate through both theory and extensive simulations, that these new proposal distributions can greatly outperform the traditional local proposals when it comes to exploring complex heterogenous spaces and multi-modal distributions. Our method can easily be applied to most, if not all, problems involving MCMC and unlike many other remedies which improve the performance of MCMC it preserves the simplicity of the underlying algorithm.     

高职学生特点及教育管理研究

高职教育是培养面向生产、建设、管理、服务一线的高素质人才，其教育类型的特点决定了其学生教育管理也具有自身特点。本文在调研和走访的基础上，提出高职学生教育管理的基本思路。     

对高等职业教育课程改革的思考

高职教育的课程改革事关企业或行业的需求与高职院校的发展,只有在校企合作的机制下,走＂契约式＂高职教育课程改革的路子,才能使高职课改切实有效,进而达到预期的目的。     

Duality of the improved algebraic method (DIAM)

In this note we present a variant of the improved algebraic method (IAM) using a duality analysis to solve linear programming (LP) problems where more insights to the method are presented. When the coordinates of all vertices are computed, any feasible point can be expressed as a linear combination of the vertices. The objective function is expressed as a weighted sum of its evaluation at the feasible vertices and the optimal point is associated with the highest/lowest coefficient of the weighted sum.     

Professional Relationship Boundaries: A Social Work Teaching Module

Social workers are often challenged by the complex and ever‐changing dynamics within their relationships with clients, and struggle to find ethical responses within professional boundary grey zones where boundaries with clients can be difficult to identify, yet easy to cross. Social work educators attempt to prepare students for these complex situations, yet in the United States research reveals rates of social work boundary violations that lead one to question the efficacy of social work ethics education. This article describes the educational competencies and instructional strategies that comprise an adaptable course module which was developed in response to this challenge, and intended to increase students' self‐awareness, motivation and professional judgment‐making abilities related to their professional boundaries. The educational competencies for this course include the abilities to: identify boundary violations, apply critical thinking skills to complex professional relationship contexts, increase awareness of self and other, and initiate prevention strategies. In contrast to traditional approaches to education, this article describes instructional strategies that are based on adult‐learning principles, which have the purpose of effectively and creatively teaching topic areas in such a way as to produce behavioural change. These course topic areas include a ‘Professional Relationship Boundaries Continuum’ conceptual framework, boundary violation impacts, personal boundary vulnerabilities, blurring boundary indicators, and risk‐minimizing strategies.     

Developing critical and empathic capabilities in intercultural education through the VaKE approach

One of the core goals of intercultural education is to develop critical and empathic reflection on social justice, particularly as related to humanistic choices and how individuals can counteract exclusion. The present article analyses the Values and Knowledge Education (VaKE) approach, which is aimed at raising awareness about implicit value-oriented priorities in decision-making. Through the Human Development and Capability Approach, the applicability of VaKE’s didactic principles is analysed in relation to young people’s perspectives on resettlement in Europe. The VaKE method was used at a 2013 summer camp in Austria with a culturally diverse group of young Europeans who were presented with a dilemma story that highlighted the complex issue of providing assistance to asylum seekers. The participants engaged in various knowledge and moral viability checks that enabled them to engage with opposing arguments. The participants evidenced critical reflection and self-scrutiny, as well as affiliation and empathic imagination, regarding problems that are encountered by asylum seekers.     

Educated Caring: The Emergence of Professional Identity Among Nurses

This article examines the formation of occupational identity in a nursing program. The normative and ideological dimensions of this process are revealed in the program’s goals and the views of educators and students through qualitative data from observations and 30 in-depth interviews. Educators seek to socialize students toward professionalism to raise the occupation’s status by emphasizing the scientific and technical basis of nursing. Yet students uphold a gendered discourse by identifying a normative dimension of caring as central to their occupational identity. The dilemma between professionalism and caring is reconciled as students construct an occupational identity based on “educated caring,” where these two dimensions are equally valuable and significant.

日本高等教育考察记

近些年来,受经济社会发展和政府改革的影响,日本高等教育出现了一些新的变化趋势。本文是作者近期考察日本高等教育的专题报告,内容主要涉及近期日本高等教育发展与变革的若干趋势,以及根据考察访问所引发的对日本大学现状与特点的一些看法。     

体育课教法与学法新探

任何教学行为都是通过教法和学法来完成的,在体育课中表现形式更为具体。如何在有限的时间里,探索出一条 科学、高效的教学方法,教师不仅要在教法上下功夫,还要以学生为主体,在学法上做文章。     

The manager's role in employees' successful return to work following back injury

Abstract

This study reports on the short-term effects of an educational programme for immediate supervisors on employees' back pain problems. The course was designed to help supervisors more efficiently deal with employees returning to work after being treated for back pain. Forty-seven supervisors who had personnel either undergoing treatment for back pain problems or were candidates for this treatment were invited to attend a one-day course. This educational package consisted of information about back pain and stressed specific behaviours which supervisors could use to help their employees successfully return to work. The results showed that 78% of the supervisors found the course to be satisfactory enough to recommend it to a colleague without hesitation. Furthermore, independent ratings made by the supervisors and their employees suggested that supervisors complied with the recommended programme. Returning employees, moreover, gave their supervisors significantly higher ratings of support than a control group whose supervisors had not attended the educational programme. It was concluded that an educational programme which alters specific supervisory behaviours may be an effective method of assisting employee return to work after treatment for back pain. Further research is needed to determine the long-term effects of such a programme on absenteeism due to illness.