The aerospace plane design challenge: Credible computational fluid dynamics results

Computational fluid dynamics (CFD) is necessary in the design processes of all current aerospace plane programs. Single-stage-to-orbit (STTO) aerospace planes with air-breathing supersonic combustion are going to be largely designed by means of CFD. The challenge of the aerospace plane design is to provide credible CFD results to work from, to assess the risk associated with the use of those results, and to certify CFD codes that produce credible results. To establish the credibility of CFD results used in design, the following topics are discussed: CFD validation vis-a-vis measurable fluid dynamics (MFD) validation; responsibility for credibility; credibility requirement; and a guide for establishing credibility. Quantification of CFD uncertainties helps to assess success risk and safety risks, and the development of CFD as a design tool requires code certification. This challenge is managed by designing the designers to use CFD effectively, by ensuring quality control, and by balancing the design process. For designing the designers, the following topics are discussed: how CFD design technology is developed; the reasons Japanese companies, by and large, produce goods of higher quality than the U.S. counterparts; teamwork as a new way of doing business; and how ideas, quality, and teaming can be brought together. Quality control for reducing the loss imparted to the society begins with the quality of the CFD results used in the design process, and balancing the design process means using a judicious balance of CFD and MFD

If You Can't Trust the Farmer, Who Can You Trust? The Effect of Certification Types on Purchases of Organic Produce

An information asymmetry exists in the market for organic produce since consumers cannot determine whether produce is organically or conventionally grown. Various methods may solve this problem including signaling, reputation, and certification. Signaling and reputation may not work well, because signals are noisy, and reputation may be difficult for a producer to establish. Certification of the farm and its growing methods shows the most promise. A survey instrument testing the efficacy of certification is presented along with empirical analysis suggesting that no notable difference existed between independent certification methods, although independent certification had significantly different effects than self-certification.Asymmetric information, Certification, Ordered probit, Organic produce, Agribusiness,

ACCESS: An Inception Report

Imagine a world in which all groups of citizens coming together to realize some public benefit measure and communicate the character and consequences of their work. Imagine further that all those groups have adopted a common reporting system that enables their individual reports to be compared, thus creating powerful descriptions of the relative and collective performance of citizen association for public benefit. Imagine, too, that this common measuring and reporting carries across to all forms of public-private partnership and corporate social responsibility. This is the world envisioned by ACCESS.For the past 18 months a growing number of concerned actors have been meeting, studying, and testing opinion around one of the great structural weaknesses in the world's institutional infrastructure -- inefficient and weak social investment markets. This inception report sets out the results of this enquiry in the form of a proposal to establish a reporting standard for nonprofit organizations seeking to produce social, environmental and, increasingly, financial returns. The ACCESS Reporting standard is one important contribution to redressing a major global system weakness, but it is certainly not the only one. Nor is it one that can operate in isolation from other initiatives. Accordingly, the ACCESS proposed plan of work involves convening a global dialogue on NGO transparency, accountability and performance with the objective of promoting ACCESS and other practical solutions to the challenges of social investment and civil society accountability.This report sets out the background and rationale for these proposals. You will meet the ACCESS sponsors and pilot project partners. Parts of the report are descriptive and analytical but other parts are necessarily theoretical and technical in nature. We make no apology for this. Part of the reason that in 2003 the world does not yet have a reporting standard for social actors is that the theory and technique have not been mastered. For those with a strong orientation toward strategy and action, however, these aspects are presented as well

Can Advocacy-Led Certification Systems Transform Global Corporate Practices? Evidence, and Some Theory

There is emerging evidence that globalization is beginning to provide new opportunities for global coalitions of advocacy groups to bring market-based pressures to bear upon major transnational firms in a way that promotes higher standards of social and environmental responsibility in production processes and trade relations. This can be seen as successful citizen-led attention to the “production and process methods” which the Uruguay Round of trade negotiations explicitly chose to omit. More broadly it may reflect the increased importance of global branding, improved awareness in both consumer and financial markets of the social and environmental practices of firms, and collaboration on the part of producers to reduce their risk of brand-damaging attacks on the social and environmental responsibility of their practices. The emergence and growth of the Forest Stewardship Council as the “gold standard” for sustainable forest management, and the expensive attempts by the forest products industry to create industry-driven substitute standards, may be the pivotal example of this phenomenon. The further growth of certified Fair Trade practices under Transfair USA is another example. Both cases provide important lessons as to the elements of present and future success for this movement. They may also represent creative new solutions for problems of persistent poverty by using the leverage of markets in the global North to improve the ability of workers, farmers, and other producers in the global South to build natural assets in ways that generate socially and environmentally sustainable livelihoods.

Corporate Codes of Conduct: Is Common Environmental Content Feasible?

In a developing country context, a policy to promote adoption of common environmental content for corporate codes of conduct (COCs) aspires to meaningful results on two fronts. First, adherence to COC provisions should offer economic benefits that exceed the costs of compliance; i.e., companies must receive a price premium, market expansion, efficiency gains, subsidized technical assistance, or some combination of these benefits in return for meeting the requirements. Second, compliance should produce significant improvements in environmental outcomes; i.e., the code must impose real requirements, and monitoring and enforcement must offer sufficient incentives to prevent evasion. With those goals in mind, we explore options for establishing common environmental content in voluntary COCs. Because the benefits of a COC rest on its ability to signal information, we ground our analysis in a review of experiences with a broad range of voluntary (and involuntary) information-based programs: not only existing corporate COCs, but also the International Organization for Standardization (ISO) family of standards, ecolabels, and information disclosure programs. We find some important tradeoffs between harmonization, applicability, feasibility, and efficacy.corporate social responsibility, codes of conduct, environmental management

The Realities of K-12 Virtual Education

In a decade, virtual education in its contemporary form of asynchronous, computer-mediated interaction between a teacher and students over the Internet has grown from a novelty to an established mode of education that may provide all or part of formal schooling for nearly one in every 50 students in the US. In a non-random 2007 survey of school districts, as many as three out of every four public K-12 school districts responding reported offering full or partial online courses.There can be little question that virtual courses in certain areas (e.g., math, English, social studies) produce tested achievement results on a par with those of their conventionally taught counterparts. Nor is it debatable that more complex areas of the curriculum (e.g., the arts) are beyond the reach of these new arrangements. Nevertheless, the rapid growth of this new form of schooling raises questions of cost, funding, and variable quality that require the immediateattention of policymakers

SOME ECONOMIC IMPLICATIONS OF PUBLIC LABELING

This article discusses economic issues related to public labeling. The main contributions in both the empirical and theoretical literatures are presented in order to motivate responses to the questions, when should a regulator promote public labeling, and what are the limits to and the possible market distortions from public labeling? Although the issues are complicated, there is already much economic guidance that can be given to inform the policy debate over food labeling.Agribusiness,

Rush to Judgment: Teacher Evaluation in Public Education

The troubled state of teacher evaluation is a glaring and largely neglected problem in public education. Co-director Thomas Toch and Robert Rothman of the Annenberg Institute for School Reform examine the causes and consequences of the crisis in teacher evaluation, as well as its implications for the current debate about performance pay

The Evidence Base for Environmental and Socioeconomic Impacts of “Sustainable” Certification

Initiatives certifying that farms and firms adhere to predefined environmental and social welfare production standards are increasingly popular. According to proponents, they create financial incentives for farms and firms to improve their environmental and socioeconomic performance. This paper reviews the evidence on whether sustainable certification of agricultural commodities and tourism operations actually has such benefits. It identifies empirical ex post farm-level studies of certification, classifies them on the basis of whether they use methods likely to generate credible results, summarizes their findings, and considers the implications for future research. We conclude that empirical evidence that sustainable certification has significant benefits is limited. We identify just 37 relevant studies, only 14 of which use methods likely to generate credible results. Of these 14 studies, only 6 find that certification has environmental or socioeconomic benefits. This evidence can be expanded by incorporating rigorous, independent evaluation into the design and implementation of projects promoting sustainable certification.sustainable, certification, eco-label, literature review