63 resultados para Turbo codes

em Deakin Research Online - Australia


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This paper considers the commitment to business ethics of the top 500 companies operating in the Australian private sector and communicates the results of a longitudinal study conducted from 1995 to 2001. Primary data was obtained (in 1995 and again in 2001) via a self-administered mail  questionnaire distributed to a census of these top 500 Australian  companies. This commitment of each company to their code of ethics was indicated and measured via a range of methods used by organizations to communicate the ethos of their codes to employees. Just as they were in  1995, it would appear that companies in 2001 still are good at ensuring that their rights are protected, but at the same time they do not seem to take on the responsibility to ensure that employees'' rights are just as well protected. This double standard leads to cynicism towards the current business ethics processes inherent in Australian companies.

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Codes of ethics are prevalent in major corporations around the world. They are seen as the first tangible commitment to being ethical. This paper examines codes of ethics and tries to establish what they are, how they are developed and their net utility. We then proffer the idea of codes as the first part of a five-stage process that leads to an overall corporate commitment to being ethical in one's business dealings.

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This letter addresses the problem of the design of a precoder for multiple transmit antenna communication systems with spatially and temporally correlated fading channels. By using the asymptotic (high signal-to-noise ratio) mean-square error of the channel estimates, the letter derives a precoder for unitary space-time codes that can exploit the spatiotemporal correlation in the time-varying fading channels. Simulation results illustrate that significant performance gains can be achieved by using the new precoder.

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We develop an approach to jump codes concentrating on their combinatorial and symmetry properties. The main result is a generalization of a theorem previously proved in the context of isodual codes. We show that several previously constructed jump codes are instances of this theorem.

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The stock market crash of 1987 was a defining moment in Australian corporate life. As a nation, we became acutely aware of the ‘moral bankruptcy’ that had come to permeate our corporate world. The focus on business ethics or the lack of it, in corporate Australia in the late 1980s, prompted this research.

The research for this paper that was first conducted in 1995 and replicated in 2001 focussed on the top 500 companies in Australia. These companies were surveyed on a raft of issues, one of which was their use of their codes of ethics in the marketplace. This paper examines the data sets from 1995 and 2001 and concludes that many of Australia’s largest enterprises have recognised the need for business ethics. As perceived by them, they can and do use their codes of ethics in a positive manner in the marketplace and attribute benefits to this interaction.

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This article examines the results of a study conducted of the top 100 public sector units in Sweden. These units are comprised of entities of government, municipalities, and county councils. The aim of the study was to examine and describe the commitment to codes of ethics in these Swedish public sector units. This article reports on the responses of those public sector units that possessed a code of ethics. The construct of commitment was measured by a consideration of the inputs, objectives and outputs of the code across six areas. The commitment to codes of ethics has an interest for those involved in the public sector in Sweden and society in general. Most public sector units are in the early stages of development and assimilation into overall ethics policies in code artefacts. On a specific level there are customized codes of ethics that are not always documented in a generic artefact. Theoretical and managerial implications are provided. Furthermore, suggestions for further research are proposed.

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This paper reports on and analyzes the contents of 197 corporate codes of ethics (78 Australian, 80 Canadian and 39 Swedish). Among other things, it was found that the contents of the Australian and Canadian codes were similar, reflecting the similar histories and cultures (as measured by Hofstede's dimensions) of these two countries. Further, the contents of the Swedish codes were found to be very different from the Australian and Canadian codes in some areas, reflecting the cultural differences between Sweden and the other two countries.

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Purpose - Research has so far not approached the contents of corporate code of ethics from a strategic classification point of view. Therefore, the objective of this paper is to introduce and describe a framework of classification and empirical illustration to provide insights into the strategic approaches of corporate code of ethics content within and across contextual business environments.

Design/methodology/approach -
The paper summarizes the content analysis of code prescription and the intensity of codification in the contents of 78 corporate codes of ethics in Australia.

Findings - The paper finds that, generally, the studied corporate codes of ethics in Australia are of standardized and replicated strategic approaches. In particular, customized and individualized strategic approaches are far from penetrating the ethos of corporate codes of ethics content.

Research limitations/implications -
The research is limited to Australian codes of ethics. Suggestions for further research are provided in terms of the search for best practice of customized and individualized corporate codes of ethics content across countries.

Practical implications -
The framework contributes to an identification of four strategic approaches of corporate codes of ethics content, namely standardized, replicated, individualized and customized.

Originality/value - The principal contribution of this paper is a generic framework to identify strategic approaches of corporate codes of ethics content. The framework is derived from two generic dimensions: the context of application and the application of content. The timing of application is also a crucial generic dimension to the success or failure of codes of ethics content. Empirical illustrations based upon corporate codes of ethics in Australia's top companies underpin the topic explored.

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The aim of the study was to examine the ways that private sector organizations in Sweden and Turkey communicated the intent of their codes of ethics to their employees. Primary data was obtained via a self-administered mail questionnaire distributed to a census of the top 500 private sector organizations in each country based on revenue. The study identified some interesting results that showed that the small group of companies in Turkey that have a code may be more advanced in ethics artefacts usage than Sweden. Such a conclusion is counterintuitive as one would have expected a developed nation like Sweden to be more advanced in these measures than a developing nation such as Turkey. The culture of one's country may playa large role in the implementation of ethics artefacts in corporations and could be a major reason for this difference.

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The objective of this paper is to develop and describe a construct of the ethos of the corporate codes of ethics (i.e., an ECCE-construct) across three countries, namely Australia, Canada and Sweden. The ECCE-construct makes a contribution to theory and practice in the field as it outlines a theoretical construct for the benefit of other researchers. It is also of managerial interest to marketing organizations as it provides a grounded framework of areas to be considered in the implementation in organizations of corporate codes of ethics.

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This article summarizes and aggregates the results of a study conducted of the largest 100 public sector organizations derived from three categories in Sweden. These categories of organizations comprise 40 entities of government, 40 municipalities, and 20 county councils. The objective was to describe the determinants of codes of ethics in Swedish public sector organizations. This research reports on the responses of 27 organizations that possessed a code of ethics. The principal contribution is a 4P-model of seven internal and external determinants in public sector codes of ethics. The identified determinants relate to four principal sectors of a society, namely: public community sector, private corporate sector, private citizen sector, and political/policy conduct sector.

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Examines business ethics in Swedish public sector organizations, and in particular, explores the content of public sector codes of ethics; suggests that it is possible through such an analysis to gain an understanding of an organization's performance in this area. Describes the questionnaire survey sent to public sector organizations (government, county councils, municipalities) requesting information on how they developed an ethical ethos into their daily operations, and details the analysis undertaken into their codes of ethics. Draws on case studies with public sector units representing best practice, in respect to codes of ethics, to develop a customized public sector scale (PUBSEC-scale) consisting of seven dimensions and 41 items. Makes suggestions as to how the PUBSEC-scale could be used; points to the differences between the codes of ethics in the public and private sectors; looks at what the private sector can learn from the public sector; makes suggestions for further research.

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Purpose – The purpose of the study is to examine and describe the use of codes of ethics in the top 100 companies operating in the Swedish corporate sector. This paper reports on the responses of those companies that possessed a code of ethics.

Design/methodology/approach – A three-stage research procedure was used. First, a questionnaire was sent to the public relations managers of the top 100 companies operating in the Swedish corporate sector (based on revenue). Companies were asked to answer up to 29 questions and to supply a copy of their code of ethics. The second stage involved content analysis of the codes of ethics supplied by survey respondents. The third stage involved a more detailed follow-up of a smaller group of firms that appeared to be close to best practice. Findings for Stage 1 of the research are reported in this paper. The areas of questioning were: how common are codes of ethics? Who was involved in the development of these codes? What are the reasons for the codes? How are they implemented? Do companies inform internal and external publics of the codes? What are the prescribed benefits of the codes?

Findings – It would appear that business ethics has only recently become a topic of interest in corporate Sweden and that many companies are in the early stages of code development and assimilation into company policies. The incidence of codes in the population (of 100) suggested by this survey (56 per cent) is lower than a US study finding (in 1995) that over 84 per cent of comparable US companies had codes of ethics. It would appear that Sweden today lags behind the US situation of 1995. When one investigates the special measures to support the inculcation of ethical values at the organizational level, there appears to be some shortfall. The supporting measures of ethics committees, ethics training committees, ethics training, ombudsman, an ethical audit and procedures to protect whistleblowers appear to be under-utilized in companies that possess codes. This lack of utilization tends to suggest that companies in Sweden, as yet, either have not developed a high commitment to supporting business ethics in their corporations, or they may have developed other methods to support their codes in their organizations that they view are as beneficial as the traditional methods practised in other western industrial democracies.

Research limitations/implications – This research was limited to internal ethical expectations. The commitment to business ethics is usually explored in terms of internal ethical expectations, but the simultaneous consideration of the external ethical expectations in the marketplace (e.g. among suppliers and customers or other publics) is desirable. A dyadic approach considering a company's internal ethical expectations and the external ethical expectations of a company's business activities may give a more balanced and in-depth approach.

Practical implications – Evidence is now available to show that codes of ethics are well developed in many of Sweden's largest corporations: organizations that, from their responses, appear to see a diverse range of benefits in developing the area of business ethics. Companies are beginning to implement not only a code of ethics, but other complementary initiatives that reinforce the need for the culture of the organization to be ethical. Codes of ethics are perceived by organizations to have assisted them in their dealings in the marketplace and many companies use their ethical values to underpin their strategic planning process. It appears that many companies now see the formalisation of business ethics as an integral part of their commercial practices.

Originality/value – This study is the first one of its kind on codes of ethics in corporate Sweden. It will enable all sectors of Swedish business to benchmark their efforts against the major companies in the Swedish corporate sector.