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991.
Diverse kinds of financial information have been claimed to be relevant, for one purpose or another. A survey by mailed questionnaire over seven professional groups in five large U.S. cities sought to discover whether certain valuation rules yielded serviceable amounts in specific problem settings or in representations of financial position and income. Most of the questions were posed in the form of simple problem situations. To questions relating to wealth, spending power and financial position, large majority responses rejected conventional accounting values and endorsed market selling prices. To questions on income calculation, majorities favouring use of the same principle were smaller. Cross-tabulations of answers on financial position and income showed substantial inconsistencies; a hypothetical explanation is given. A comparison is given of responses to some questions in similar surveys in Australia and South Africa.  相似文献   
992.
Understanding and undertaking technological practice is fundamental to student learning in technology education in New Zealand, and the enhancement of student technological literacy. The implementation of technology into New Zealand’s core curriculum has reached the stage where it has become critical that learning programmes are based on student progression to allow for a seamless education in technology from early primary to senior secondary. For this to occur, teachers and students need to focus learning on key features of technology education. This paper is based on research initiated in 2001 which explored the nature of progression of student learning in technology. It draws on findings from research undertaken in New Zealand classrooms in 1999–2000 that resulted in the development of the technology assessment framework (TAF), (as reported in detail Compton & Harwood 2003). The 1999–2001 research was funded by the New Zealand Ministry of Education. Findings from the 2001 research allowed for the identification of key features of technology education that are relevant across all age groups, contexts and technological areas. These key features were collectively termed components of practice. The three components of practice established to date are brief development, planning for practice, and outcome development and evaluation. This paper discusses the development of progression matrices for each of these and provides illustrative examples of student work levelled against the matrix indicators of progression for brief development.  相似文献   
993.
This paper investigates the potential and actual contribution of corporate social responsibility (CSR) to gender equality in a framework of gender mainstreaming (GM). It introduces GM as combining technical systems (monitoring, reporting, evaluating) with political processes (women’s participation in decision-making) and considers the ways in which this is compatible with CSR agendas. It examines the inclusion of gender equality criteria within three related CSR tools: human capital management (HCM) reporting, CSR reporting guidelines, and socially responsible investment (SRI) criteria on employee and diversity issues. Although evidence is found of gender equality information being requested within several CSR related reporting frameworks, these requirements are mostly limited in scope, or remain optional elements. The nature and extent of relevant stakeholder opportunities are investigated to explain this unfulfilled potential.  相似文献   
994.
This paper considers the implementation of a non-stationary, heterogeneous Markov model for the analysis of binary dependent variables in a time series of repeated cross-sectional (RCS) surveys. The model offers the opportunity to estimate entry and exit transition probabilities and to examine the effects of time-constant and time-varying covariates on the hazards. We show how maximum likelihood estimates of the parameters can be obtained by Fishers method-of-scoring and how to estimate both fixed and time-varying covariate effects. The model is exemplified with an analysis of the labor force participation decision of Dutch and West German women using ISSP (and other) data from 10 annual Dutch surveys conducted between 1987 and 1996 and 7 annual West German surveys conducted between 1988 and 1994. Some open problems concerning the application of the model are discussed.  相似文献   
995.
In this paper, the maximum determinant of the associated 0-1 matrix in D-Optimal saturated main effect plans for 3× s_2 × s_3 factorials, is derived by the use of Graph theory and Combinatorics. The present work is related to a problem suggested by Chatterjee and Narasimhan (2002). Using the theoretical results, we also give the designs for s3s2 + 1. This research was supported by the State Scholarships Foundation of Greece.  相似文献   
996.
>With assets of over US$1.0 trillion and growing, public pension funds in the United States have become a major force in the private sector through their holding of equity positions in large publicly traded corporations. More recently, these funds have been expanding their investment strategy by considering a corporations long-term risks on issues such as environmental protection, sustainability, and good corporate citizenship, and how these factors impact a companys long-term performance. Conventional wisdom argues that the fiduciary responsibility of the pension funds trustees must be solely focused on their beneficiaries and, therefore, their investment criteria must be based strictly on narrowly defined financial measures. It is also asserted that well-established financial measurements of corporate performance already include long-term risk assessment through discounted present value of future flow of earnings. Consequently, all other criteria are contrary to the best interest of the pension funds beneficiaries. In this paper, we assert that, contrary to conventional wisdom, pension funds, and for that matter other mutual funds, must be concerned with the long-term survival and growth of corporations. These measures are generally referred to socially responsible investing (SRI) and when applied to corporations, it is termed socially responsible corporate conduct (SRCC). We demonstrate that current measurement of future risk assessment invariably understates, and quite often completely overlooks, these long-term risks because of the inherent bias towards short-run on the part of financial intermediaries whose compensation depends greatly on short-term results. Furthermore, there is ample evidence to suggest that these intermediaries have been engaging in self-serving practices and thus failing in their duties to serve their clients, i.e. pension funds, best interests. Because of their large holdings in the total market as well as individual companies, these funds cannot easily divest from poorly performing companies without destabilizing the companies stock and overall markets. Hence, they must opt for a strategy of emphasizing investment criteria that encourage companies to take into account long-term aspects of their operations in terms of their impact on environment, sustainability, and community welfare, to name a few. We argue that an exclusionary, and even a primary, focus on short-term financial criteria is no longer a viable option. It also calls for the pension funds to encourage greater transparency and accountability of the entire corporate sector through improved corporate governance. Thus socially responsible investing practices are not merely discretionary and desirable activities; they are a necessary imperative, which both the corporations and public pension funds, and other large institutional holders, will ignore at serious peril to themselves. Finally, the paper considers some of the recent developments where corporations have been responding to these challenges and how their actions might be strengthened through greater disclosure and transparency of corporate activities. It also makes recommendations for the pension funds to support further research in creating new measurement standards that further refine the concept of socially responsible investing as a necessary ingredient of long-term corporate survival and growth in the context of a changing economic, environmental and socio-political dynamic.  相似文献   
997.
提出了一种应用干扰估计和双硬件限幅器的光CDMA的直接检测技术。在提出的系统中,当硬件限幅器的输出为“0”时,系统的输出为“0”;当硬件限幅器的输出为“1”时,系统估计这个“1”到底是干扰还是传输的信号。仿真结果表明,该系统有效地减小了多用户干扰的影响。  相似文献   
998.
999.
本文提出了采用数据扩展技术在正交频分复用(OFDM)系统中实现不等错误保护(UEP)传输的自适应调制算法.利用原始数据符号传输特性相同的特点,分别研究了以提高信道容量为目标,功率一定,最大化传输速率的不等错误保护UEP算法;以及以用户需求为目标,传输速率一定,最小化总功率的不等错误保护UEP算法.这两种算法均可根据待传输数据的要求,保证不同优先级数据的不同传输质量和不同传输速率.仿真结果表明,最大化传输速率UEP算法可以在速率最大化的同时,保证传输质量要求;最小化总功率UEP算法可以在最小化发射功率的前提下,保证传输质量要求.与传统OFDM系统中相应算法的比较结果可以看出,采用数据扩展技术可以大大降低算法复杂度,减少有关调制参数信息的传输,在实现UEP时,在性能和复杂度之间具有较好的折中,具有较高的实际应用价值.  相似文献   
1000.
本文重点关注"区域性、战略性和新兴性"三个特征,区域战略性新兴产业选择应坚持国家意志与区域特征相结合、定量分析与定性分析相结合、增长潜力与关联带动相结合以及技术创新与持续发展相结合的四个原则。基于以上原则,构建出"区域战略性新兴产业选择五力模型",即包含产业惯性力、产业发展力、产业带动力、产业创新力和产业持续力的"五力"因素,具体分解出包括14个指标的选择指标体系。依据以上选择指标体系,本文综合运用层次分析法(AHP)和Del-phi法,建立起一个主客观方法相结合的区域战略性新兴产业选择模型。  相似文献   
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