Academic literature on the topic 'Schaefer conceptual model'

Purpose In a recent article, Schaefer et al. (2015) argue that cultivating appropriate beliefs and values, cultivating systems thinking and encouraging responsibility are the stages to be followed to achieve sustainability-as-flourishing from an organizational perspective. This analysis forms the basis for the development and discussion of a conceptual model to educate undergraduate business students at a New Zealand University into responsible leaders who strive to enact sustainability-as-flourishing in organizations. Design/methodology/approach This paper critiques current approaches to sustainability which often reflect a narrow understanding of human needs and do not demand necessary transformation in the way we interact with the world around us. It then provides an overview of sustainability-as-flourishing, and its various stages, with relevant examples from business. This is followed by a discussion of the conceptual model, the pedagogical philosophies underpinning it and the teaching methods required for shifting business students’ mindsets towards this end. Findings This is a conceptual paper that offers a new teaching model for sustainability-as-flourishing. The paper concludes with suggestions for sustainability educators in business. Originality/value To date, sustainability-as-flourishing is underdeveloped in the business literature. This conceptual paper unpacks this notion further. Additionally, it provides a model for business educators to teach sustainability-as-flourishing. While some of these ideas and features have been described in the literature previously, to the best of the authors’ knowledge, this is the first time they have been brought as a coherent whole under this broader and unique approach of sustainability-as-flourishing.

Anna Z. 2018. An analysis of capture fisheries resource depletion in Cirata Reservoir, West Java, Indonesia. Biodiversitas 19: 927-935. Fisheries in public waters such as the Cirata Reservoir in West Java, Indonesia are potential economic resources that should not be ignored. They play an important role in food security for the surrounding communities. Unfortunately, natural capture fisheries in Cirata Reservoir have received less attention in the past than aquaculture which dominates economic activity in the waters. Recently, the condition of the dam has deteriorated as a result of major aquaculture activity with extensive use of artificial feedstock; an increase in industrial and domestic waste entering the waters; and open access fisheries management that has allegedly caused depletion of the natural fish resources of the waters. From time to time there have been observed declines in the natural capture fisheries production. The research reported in this paper aimed to estimate the extent of this depletion and associated economic depreciation of capture fish resources in the Cirata Reservoir. Bio-economic methods were used to calculate the potential sustainable utilization of the resources. The analytical model of Logistic Gordon-Schaefer (GS) and Fox models provided the framework for the analysis. The fish depletion was calculated by comparing the potential sustainable utilization and the value of the actual utilization, based on quarterly data for the years 2011 up to 2016. Depreciation was calculated in terms of unit rent loss as a result of the depletion. The analysis showed that depletion of fish resources occurred in certain quarters between years of 2011 to 2016. The value of the total depletion over this period for the GS model amounted to 835.13 tons with an estimated value for depreciation of IDR 5.93 Billion, or IDR 84.71 Billion in Present Value term. For Fox Model, the depletion reaches 1421.35 Ton, with a value of IDR 10.09 Billion, or 144.17 Billion in Present Value term. This value represents the economic loss due to depletion of the fisheries resource in Cirata Reservoir. The policy implication of this fish depletion is that there is a need for better management of the aquatic habitat, by reducing water pollution load, and by regulation of capture fisheries through input/output restrictions based on the conceptual tools of Maximum Sustainable Yield (MSY) and Maximum Economic Yield (MEY).

This paper presents a general theory for analysis of catch and effort data from a fishery. Almost all previous methods are shown to be special cases, including those of Schaefer, Pella and Tomlinson, Schnute, and Deriso, as well as the stock reduction analysis technique of Kimura and Tagart and Kimura, Balsiger, and Ito. Like that of Deriso, the theory here is based on natural equations for an age structured population. However, instead of a fixed single model, this paper gives a general model that can be tailored to any particular fishery. The problem of determining the appropriate special case is conceptually identical to the model identification problem described by Box and Jenkins in the context of time series analysis, Identification necessarily begins with a suitable class of models. This paper defines such a class, unique to fisheries, complete with mathematical proofs and biological explanations of all important equations.

Here we study the thermodynamic cost of computation and control using ‘physically universal’ cellular automata (CAs) or Hamiltonians. The latter were previously defined as systems that admit the implementation of any desired transformation on a finite target region by first initializing the state of the surrounding and then letting the system evolve according to its autonomous dynamics. This way, one obtains a model of control where each region can play both roles, the controller or the system to be controlled. In physically universal systems every degree of freedom is indirectly accessible by operating on the remaining degrees of freedom. In a nutshell, the thermodynamic cost of an operation is then given by the size of the region around the target region that needs to be initialized. In the meantime, physically universal CAs have been constructed by Schaeffer (in two dimensions) and Salo & Törmä (in one dimension). Here we show that in Schaeffer’s CA the cost for implementing n operations grows linearly in n, while operating in a thermodynamic cycle requires sublinear growth to ensure zero cost per operation in the limit n → ∞. Although this particular result need not hold for general physically universal CAs, this strong notion of universality does imply a certain kind of instability of information, which could result in lower bounds on the cost of protecting information from its noisy environment. The technical results of the paper are sparse and quite simple. The contribution of the paper is mainly conceptual and consists in illustrating the type of thermodynamic questions raised by models of control that rely on the concept of physical universality.

The number of patients who suffer from colorectal cancer in Thailand has increased during the last three decades as a result of the change to a Westem-style diet. Due to many patients presenting at a late stage and the location of tumours in the rectum, patients have a higher probability of needing a colostomy. This study explores the experiences, coping strategies and the factors that influence coping strategies over a sixmonth period in a group of Thai colorectal cancer patients who have a colostomy. The conceptual framework used in this study was based on the Moos and Schaefer conceptual model of the stress and coping process. A case study methodology was employed to collect both quantitative and qualitative data from eleven participants at three points in time: within one month after the operation to create a colostomy, three months and six months after the operation. Data were collected from structured interviews, which followed the Coping Responses Inventory (CRI), the Ostomy Adjustment Scale (OAS), the Personal Resources Questionnaire 2000 (PRQ 2000), the Life Orientation Test-Revised (LOT-R), and the Functional Assessment Cancer Therapy- Colon (FACT-C). These data provided information on the participants' levels of coping strategies, adjustment to a colostomy, social support, optimism and quality of life. Indepth interviews with open-ended questions provided a deeper understanding of the participants' experiences in relation to their colostomy. Findings from quantitative data showed statistically significant changes in the participants' quality of life over time, particularly in their physical and functional wellbeing. An examination of the coping focus used (approach and avoidance) indicated that participants utilised both approach and avoidance coping at the same time, although approach coping was more common. Changes in the most frequently and the least frequently used coping subtypes at six months after the operation were observed. Correlation tests showed various relationships between the levels of quality of life domains and coping subtypes as time passed. Multidimensional scaling procedures uncovered a consistent pattern of coping which involved 'problem solving' and 'seeking guidance and support'. Six major qualitative themes emerged through content analysis of the in-depth interview data. The themes described how participants' psychological and emotional concerns changed over time; the steady improvements in physical health after the operation; the difficulties of adjusting to life with a stoma; facing up to the reality of the new circumstances; the spiritual aspects of their lives; and the level of social support experienced. Religious beliefs such as the 'Law of Kanna', as well as a variety of religious rituals and other practices such as Buddhist chanting and "making merit" played important roles in coping. The findings from the quantitative and qualitative data were used in a complementary and confirmatory manner to provide a richer understanding of the participants' experiences as they coped with this life changing event. The findings of the study are significant as they provide important indicators for improvements in nursing service, particularly the development of nursing procedures to enhance the psychological aspects of care. In addition, they offer important indicators for improvement of the nursing curriculum and directions for further research in Thai culture and the health care system.