The Application of Ecological Modelling to Toxic Contaminants and Ecosystem Stress

1989 ◽  
Vol 24 (2) ◽  
pp. 323-344
Author(s):  
Efraim Halfon

Abstract This review analyzes the application of ecological modelling to problems concerning toxic contaminants and ecosystem stress and explains the purpose and methods of the systems ecology approach, which could be useful to individuals involved in data gathering activities. The review provides operational definitions of ecosystem stress, gives a description of methods of the systems approach and analyzes several topics of interest such as the application of expert system methods in the environmental field and methods of ranking. Recommendations are given to managers in charge of monitoring activities can benefit by interacting with systems ecologists. Four topics are analyzed in detail: 1) Ecosystem stress. To assess the impact that toxic contaminants have on ecosystems we must give an operational definition of ecosystem stress and how to observe it. 2) The purpose and methods of the systems ecology approach. 3) The application of artificial intelligent methods in the environmental field. 4) Methods of ranking.

2019 ◽  
Vol 11 (7) ◽  
pp. 1903 ◽  
Author(s):  
Pamela Mischen ◽  
George Homsy ◽  
Carl Lipo ◽  
Robert Holahan ◽  
Valerie Imbruce ◽  
...  

In order to understand the impact of individual communities on global sustainability, we need a community sustainability assessment system (CSAS). While many sustainability assessment systems exist, they prove inadequate to the task. This article presents the results of a systematic review of the literature on existing sustainability assessment systems; offers a definition of a sustainable community; provides a multi-scale, systems approach to thinking about community; and makes recommendations from the field of performance measurement for the construction of a CSAS.


2021 ◽  
Vol 22 (4) ◽  
pp. 392-406
Author(s):  
Tat'yana Yu. SEREBRYAKOVA

Subject. This article deals with the issues of accounting and write-offs of management costs and disclosure in reporting, their role for top managers, as well as improving the delineation and qualification of the types of costs to be accounted for as managerial, and the impact of the proposed approaches on reporting performance. Objectives. The article aims to justify the need for a clearer definition of management costs and a more logical, cost-effective division of costs into production and management ones. Methods. For the study, I used the systems approach, logical generalization and abstraction. Results. The study shows that not all expenses that organizations account for as the management ones are actual. Many of the costs relate to production activities. Since the methodological guidelines for accounting for material and operational costs have been abolished in connection with the adoption of FSBU 5 – Inventories, they may not be applied any more. Conclusions and Relevance. The subject terminology and a clear concept of management costs need to be defined. IFRS 2 – Inventories gives a more logical notion of management costs in combination with administrative costs. This makes it possible to adapt the accounting according to the Russian standards to the running accounting practice with a minimum recalculation. The presented study results are intended to develop theoretical views on the formation of the actual cost of finished products, the full cost of implementation and interpretation of these indicators for management. The results can be used for scientific and practical activities related to financial and management accounting research.


1998 ◽  
Vol 29 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Dennis D. Gilbride ◽  
J. Ressler Thomas ◽  
Robert Stensrud

The purpose of this study was to develop and test an instrument that measures the quality of job placements of State-Federal Vocational Rehabilitation program consumers. A four part operational definition of quality placement was developed that included: (1) income and satisfaction with salary; (2) benefits provided, and consumer satisfaction with benefits; (3) potential for training opportunities and career development; and (4) satisfaction with job and personal life after placement. The “Rehabilitation Success Survey” was developed by a panel of rehabilitation professionals and consumers to measure these 4 components of placement quality. The instrument was piloted in one state, revised, and then administered in a second state. Results indicated that broadening the definition of successful placement beyond status code 26 closure, provides a more comprehensive picture of the impact of employment and rehabilitation services on consumers' lives.


2002 ◽  
Vol 50 (3) ◽  
pp. 455-476 ◽  
Author(s):  
Jean Blondel ◽  
Nick Manning

This paper is concerned with the extent to which individual members of governments reliably implement the decisions of the governments to which they belong, a matter which is rarely discussed, if ever, and yet can be critical for the operation of national executives. After a general presentation of the problem, the paper examines the reasons why members of collegial governments are more likely to be reliable than members of hierarchical governments. As ‘cabinet’ governments tend to be more collegial while ‘presidential’ governments tend to be more hierarchical, unreliability seems also more likely to take place in presidential governments, to the extent that these are indeed hierarchical. Progress in this area has been hampered so far by the absence of a tight operational definition of collegial and hierarchical governments: such a definition is presented here, opening the way for the empirical testing of the impact which the distinction may have on the reliability of members of governments.


2001 ◽  
Vol 45 (1) ◽  
pp. 121-148 ◽  
Author(s):  
SCOTT T. FITZGERALD ◽  
MACK C. SHELLEY ◽  
PAULA W. DAIL

The difficulties surrounding research on homelessness are numerous and substantial. Using a statewide census of homelessness, this article analyzes and critiques common methodological techniques employed in that study. In addition, using cross-tabulation and loglinear modeling, the relationship between key demographic variables and the cited primary cause of homelessness, as well as the types of housing needed, are assessed. Through a multiphased process, which isolates the effects of the operationalized definition of homelessness, significant changes emerge. The operational definition of homelessness is found to affect the demographic composition of the sample, the estimation of annual incidents of homelessness, and the estimation of the statewide number of homeless individuals. The impact of the uncertainty surrounding research on homelessness on policy formation is addressed.


Minerals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 469 ◽  
Author(s):  
Claudio Leiva ◽  
Katheryn Arcos ◽  
Diego Poblete ◽  
Eduardo Serey ◽  
Cynthia Torres ◽  
...  

This document presents a proposal for designing an expert system in the Gabriela Mistral Division’s crushing plant belonging to Codelco (Chile) with the objective of maximizing stacked tonnage, allowing the improvement of operational variables that directly interact with the crushing process. In addition, this study considers the impact that occurs in both the process and operational continuity regarding the standardization of the system. In the first stage, a survey and analysis of historic operation data was carried out, which allowed the definition of benchmarking indicators. Subsequently, both modalities of operation were compared, monitoring processed tonnage and detentions related to operational failures. As a result, significant differences were observed in the performance of the critical line operating with expert control, with a 55% reduction in the detentions referred to operational failures. Added to this is the benefit of low cost and improved quality as the control provides an analysis of the variables in reduced time intervals, which is superior to human control.


2004 ◽  
Vol 35 (3) ◽  
pp. 22-27 ◽  
Author(s):  
Richard T. Roessler

Because it addresses the impact of illness and disability on life outcomes (e.g., employment status, emotional state, and perceived quality of life), the illness intrusiveness model provides significant insights into critical functions of rehabilitation counseling. The model illuminates the disease and treatment factors contributing to intrusiveness, the operational definition of intrusiveness, and the relationship of intrusiveness to personal control. It provides rationales for (a) interventions that enhance individuals' personal control and self-care, self-management, and task-focused coping strategies and (b) program evaluations that assess the extent to which individuals have acquired those personal orientations and skills and succeeded in reducing the intrusiveness of illness or disability in their lives.


2014 ◽  
Vol 43 (2) ◽  
pp. 331-349 ◽  
Author(s):  
RONI STRIER ◽  
LAURA SIGAD ◽  
ZVI EISIKOVITS ◽  
ELI BUCHBINDER

AbstractThis article explores the impact of poverty on working men in light of the great diversity of the working poor population. Grounded upon a social constructivist theoretical framework and a comparative qualitative study of the working poor in Israel, this article examines the construction of ‘waged work’ among low income, Israeli working men. To illuminate the complex intersection of masculinity, poverty and waged work with ethnic and cultural categories, this unique study examines four different groups of Israeli citizens, corresponding to the main sub-groups of the Israeli population: secular, ultra-Orthodox, and immigrant Jews and Arab Israeli citizens.The article has five sections. The literature review briefly introduces the intersection of masculinity, poverty and waged work, presents some background about the social construction of masculinity in the local context and concludes with a short review of the definition of ‘working poor’. The context section explains concisely the background of this study, including the uniqueness of the Israeli labour market and some short references to the different sub-groups in the study. The methodology section specifies the theoretical framework, and the data gathering and analysis methods. The findings section presents an analysis of emerging themes. Finally, the discussion elaborates on the interrelation between masculinity, poverty and waged work in light of the great diversity among the working poor and the uniqueness of the Israeli labour market.


1989 ◽  
Vol 33 (10) ◽  
pp. 576-578
Author(s):  
Neville Moray

This study was undertaken at the request of the United States Nuclear Regulatory Commission to advise them as to the necessity for a new program of research into human factors of nuclear safety following the decision to terminate research in that area in 1985. The study showed in a particularly striking way how necessary a systems approach is to the application of human factors to complex systems. It is not possible to foresee the impact of human factors on complex human-machine systems without extending the definition of human factors to include disciplines such as social and organizational psychology, management sciences, and sociology. Following the presentation of the report to the Nuclear Regulatory Commission human factors research has again begun, and the report seems to have had a significant impact on the direction and scale of work supported by NRC in this area.


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