大气阻尼对卫星运动的摄动研究

本文构造了一个大气密度模型,给出了卫星在大气阻尼作用下的摄动方程及计算近地卫星的实用公式。     

A Goodness-of-fit Test for Exponentiality Based on the Memoryless Property

In this investigation a test of goodness of fit for exponentiality is proposed. This procedure applies equally whether the scale and/or the location parameters of the distribution are known or not. The limiting null and non-null distributions of the test statistic are normal under minimal conditions. Monte Carlo critical values for small sample sizes are given and the power of the test is calculated for various alternatives showing that it compares favourably relatively to other more complicated published procedures.     

列斐伏尔《辩证唯物主义》的隐性逻辑——兼论日常生活批判理论的出场

列斐伏尔在《辩证唯物主义》一书中以异化为显性逻辑,展开对马克思《1844年经济学哲学手稿》的解读。在这一显性逻辑的背后存在着一条隐性逻辑,即日常生活批判理论的出场。在该书中列氏对人类产生过程的理解具有明显的抽象性,并把这一抽象作为异化的根源,进而在日常生活中将之泛化,最后用“总体人”的假设完成了日常生活批评的出场。     

What is the Point of Change? Change Point Detection in Relational Event Models

This paper presents an extension to the relational event model with change points (REM-CP) to study abrupt changes to social interaction behavior in temporal networks. A change point detection algorithm is proposed for exploring when and which network effects abruptly change, and a confirmatory approach to test the presence of a change point at a given moment. The effectiveness of the methodology was assessed with numerical simulations and NASA’s Apollo 13 mission data. The latter revealed dynamic communication behavior and identified time zones where most change points occurred, including around the time of the famous quote “Houston, we’ve had a problem.”     

Realism and Contingency

This paper constitutes an extended response to Athanasia Chalari's paper The Causal Impact of Resistance, which suggests that one may derive from internal conversations a causal explanation of resistance. In the context of our engagements with critical realism and digital research into social movements, we review Chalari's main argument, before applying it to a concrete case: the student protests in London, 2010. Whilst our account is sympathetic to Chalari's focus on interiority, we critique the individualism that is implicit in her argument, arguing that it emerges because of an underlying neglect of the relational aspects of resistance. Instead, we offer a relational realist analysis that treats resistance as process within an ontologically stratified account of reality that is mindful of the contingency of political acts. Taking this route, we establish resistance as an emergent relation, generative of distinctive “relational goods” in the context of collective action, which we locate at different levels of reality, as we move from an analysis of individual to collective reflexivity. In doing so we offer a sympathetic critique of Chalari, building on the thought provoking arguments contained within it, whilst also making a contribution to the theorisation of social movements and the “relational turn” within realist social theory (Archer, 2010, 2012).     

过渡时期思想文化批判运动的文化反思

过渡时期的几次思想文化批判运动造成了深远的文化影响。从文化层次反思这几次思想文化批判运动,使我们意识到构建现代政治文化的重要性,认识到践踏民主与法制的大批判文化的危害性,也使我们寻唤一种富于历史理性、勇于承担责任的忏悔文化。     

The Poverty of Ontological Reasoning

This article argues against ontology as an intelligible project for social theory. Ontological questions have proliferated in social thought in the past decades mainly as a way of recasting traditional sociological questions about individuals/society and structure/agency. Far from being an advance in our understanding, however, this form of reasoning has frequently brought confusion. This is demonstrated with detailed reference to a contribution from an ongoing debate, centred on the issue whether social structures are causally efficacious. I argue that the ontological project is mainly fuelled by a misconception of language and that, once this picture is exposed as incoherent, ontology loses its intelligibility.     

Reflective Debriefing: A Social Work Intervention Addressing Moral Distress among ICU Nurses

ABSTRACT

Health-care workers may experience moral distress when they are unable to act as they believe is ethically appropriate in their clinical work. A social worker-facilitated protocol called Reflective Debriefing was developed and tested for alleviating moral distress through regular debriefings with nursing staff on an intensive care unit (ICU). Forty-two ICU nurses completed a Moral Distress Scale-Revised (MDS-R) at the beginning and end of a 6-month period, during which time regular debriefings were offered. The overall level of moral distress on the ICU surveyed was found to be low to moderate. The top three most frequent situations causing moral distress reported by most nurses in this study were related to the provision of nonbeneficial care in the ICU. Participants reported gaining the most benefit from feeling empowered to constructively confront other staff members about truth-telling in giving a prognosis. Nurses’ overall response to the intervention was positive, with 100% of participants requesting to continue the Reflective Debriefing sessions either on a monthly or on an as-needed basis. The response to the intervention emphasized the importance of interprofessional collaboration to successfully combat moral distress among health-care workers and may protect them from burnout, detachment, and even quitting their profession.     

Promoting Deep Learning: A Teaching,Learning and Assessment Endeavour

The need for social workers to develop expertise in critical reflection is now a dominant theme in the literature. How this expertise is achieved, however, remains under‐explored in an environment increasingly focused on outcomes, evidence of performance and teachers' preoccupations with curriculum content and assessment. Students' understanding of critical reflection and how, if at all, their social work education assists in developing this capacity, continue to be under‐represented.

Applying a ‘deep‐learning’ framework, this article outlines an attempt to engage final year social work students in a teaching, learning and assessment exchange that promotes critical reflexivity. It presents the thinking behind the evolution of a unit focused on social work in public welfare and health settings. Using their final assessment exercise in which they are asked to review their learning, it then offers students' responses to that unit. In particular, the paper highlights the personalised practice visions offered by students as they seek to locate themselves, personally and professionally, before making the identity‐challenging transition from student to qualified practitioner.     

The trend toward multiple authorship in social work: A British and US comparison

This article provides a comparative analysis of publication trends in social work in the US and Great Britain. This exploratory effort seeks to identify possible explanations for the phenomenon of multiple authorship, the implications of multi-authored scholarship, and some of the potential ethical questions that may arise from such collaborations in regard to what constitutes legitimate contributions to a scholarly article or book. To the extent that common trends are emerging across international boundaries, the incentive for heightened communication and collaboration may be increased in an effort to identify implications and derive solutions to common problems.