Sample selection in radiocarbon dating

Archaeologists working on the island of O'ahu, Hawai'i, use radiocarbon dating of samples of organic matter found trapped in fish-pond sediments to help them to learn about the chronology of the construction and use of the aquicultural systems created by the Polynesians. At one particular site, Loko Kuwili, 25 organic samples were obtained and funds were available to date an initial nine. However, on calibration to the calendar scale, the radiocarbon determinations provided date estimates that had very large variances. As a result, major issues of chronology remained unresolved and the archaeologists were faced with the prospect of another expensive programme of radiocarbon dating. This paper presents results of research that tackles the problems associated with selecting samples from those which are still available. Building on considerable recent research that utilizes Markov chain Monte Carlo methods to aid archaeologists in their radiocarbon calibration and interpretation, we adopt the standard Bayesian framework of risk functions, which allows us to assess the optimal samples to be sent for dating. Although rather computer intensive, our algorithms are simple to implement within the Bayesian radiocarbon framework that is already in place and produce results that are capable of direct interpretation by the archaeologists. By dating just three more samples from Loko Kuwili the expected variance on the date of greatest interest could be substantially reduced.     

Circuit optimization via sequential computer experiments: design of an output buffer

In electrical engineering, circuit designs are now often optimized via circuit simulation computer models. Typically, many response variables characterize the circuit's performance. Each response is a function of many input variables, including factors that can be set in the engineering design and noise factors representing manufacturing conditions. We describe a modelling approach which is appropriate for the simulator's deterministic input–output relationships. Non-linearities and interactions are identified without explicit assumptions about the functional form. These models lead to predictors to guide the reduction of the ranges of the designable factors in a sequence of experiments. Ultimately, the predictors are used to optimize the engineering design. We also show how a visualization of the fitted relationships facilitates an understanding of the engineering trade-offs between responses. The example used to demonstrate these methods, the design of a buffer circuit, has multiple targets for the responses, representing different trade-offs between the key performance measures.     

Is Stakeholder Corporate Governance Appropriate in Russia?

Journal of Management and Governance - Alternative forms of disciplining the actionsof senior enterprise managers can becharacterized as shareholder or stakeholdergovernance. This paper analyzes...     

Demographic and Organizational Variables That Affect Southeastern College and University Student Health Promotion

Abstract

This study examined the relationship between demographic and organizational variables and college student health promotion efforts. Two hundred and forty-one college administrators from 14 southern states were surveyed to determine factors that may affect college student health promotion programming. Enrollment, tuition, affiliation, and highest degree offered were the demographic variables that were examined. The organizational variables were goals, control, motivation, interaction, and decision making. The methods of gathering information regarding student health problems, the kinds of health promotion programs offered, the methods of publicizing the programs, and the extent of student participation in health promotion programs were the dependent variables.

The statistical tests for the effects of the demographic and organizational variables on student health promotion efforts indicate that a relationship does exist. Combined multiple regression analysis equations that include all of the organizational variables demonstrated graphically the effects of interaction among the independent organizational variables and the dependent variables. These combined equations were better predictors of student health promotion programs and services than any of the organizational variables taken separately. Future studies of the factors that affect student participation in health promotion programs, the extent of student participation, and the effects of a student participation should be conducted.     

论小说创作

如果可能,请别写小说.小说创作是一种非社会行为,一旦动笔,小说家会时刻为小说中的人物所困扰;而且,真正写起来,小说指南一类书籍并不管用.假如非写不可,那么,小说家需考虑是以情节为主还是以人物为主.如果以情节为主,小说家即在虚构的事情中间而非在所谓的真实生活中寻找人物的时候,抓住情节不放;如果以人物为主,那么,小说家则需对适于情节的某些特征加以强调,使人物在新环境中显得真实可信,从而赋予他们生命.小说家无论重情节抑或是重人物,都还要考虑以何种形式、何种风格呈现情节和人物的问题;当然,在优秀的小说家笔下,故事和人物本身会以最适合的形式出现.小说家应对形式、人物和语言保持一种敏锐的感觉.此外,小说家可能会对道德教诲产生迷恋.尽管应当通过作品给读者以教益,但是,真诚的艺术家并不能专注于说教.     

Disability, social exclusion and the consequential experience of justiciable problems

In this article, we examine the situation of disabled people in England and Wales with regard to one specific aspect of social exclusion—experience of justiciable problems, and the potential effects such problems can have on their lives. Having defined 'disability', we examine how this fits within the wider dialogue on social exclusion issues. By analysing the results of the Legal Services Research Centre's (LSRC) periodic survey of justiciable problems, we find that disabled respondents were not only more likely to experience a problem, they also experienced more problems. Increased likelihood of a problem was observed in the majority of problem categories and particularly those relating to issues of social exclusion, such as housing and welfare benefits. This propensity to experience multiple problems can lead to a negative impact on the lives of long-term ill and disabled people.     

Lone Parents and Civil Law: Their Experience of Problems and Their Advice-seeking Behaviour

The percentage of dependent children living in lone‐parent families has more than tripled in Britain over the last 30 years. Though there is much diversity within this lone‐parent population, there are common experiences and characteristics. Lone‐parent families tend to be headed by women, to be poor, on benefits and experience problems with ill health and disability. This paper examines lone parenthood in the context of the experience of justiciable problems (problems for which there is a potential legal remedy), drawing upon a large‐scale survey of 5,611 people representative of the population of England and Wales. The survey included 223 lone parents, who were likely to be female, to be living in rented accommodation, to be on a low income, to be economically inactive and to be in receipt of benefits. Lone parents were significantly more likely than others to have experienced a justiciable problem. Lone parents sought advice for their problems more often than others, particularly from solicitors, even after controlling for problems experienced. Lone parents were more likely than others to receive legal‐aid funding. Lastly, lone parents found trying to resolve problems particularly stressful, though they tended to believe that their life had improved as a consequence of doing so.     

Moving toward recovery within clients' personal narratives: directions for a recovery-focused therapy

Recent literature emphasizes that recovery from schizophrenia involves recovery within one's own narrative of an integral sense of identity, agency, social connection, and worth. While this is intuitively appealing and consistent with a wide range of literature, it raises the issue of how to best help people do this in individual psychotherapy. In this article, we explore how psychotherapy might help people construct new narratives or storied understandings of their lives and thereby promote recovery from schizophrenia. Exemplified with two individual examples, we first discuss the barriers that challenge and the techniques that help psychotherapists seeking to enter into dialogue with people with severe mental illness. We also offer a theoretical model of how the revitalization of dialogues within therapy can be conceptualized as a process that promotes recovery and discuss the objective measurement of such outcomes.     

Depression, anxiety, and religious life: a search for mediators

We examine several potential mechanisms linking religious involvement to depressive symptoms, major depression, and anxiety. Logistic and OLS regression estimations test five sets of potential psychosocial religion mediators: perceived attitudes toward and motivations for attendance; positive and negative religious coping; religious attitudes, beliefs, and spirituality; congregational support and criticism; and interpersonal and self-forgiveness. Compared to attending services less than once a month or never, attending services once a week but no more is associated with fewer depressive symptoms and anxiety symptoms. Hypothesized mediators, including meaning, interpersonal and self-forgiveness, congregational criticism, social attendance beliefs, and negative coping are independently associated with one or more mental health outcomes.