Wind tunnel investigations at transonic Mach numbers

Investigation utilizes static and fluctuating pressure measurements and oil flow visualization techniques to analyze perturbed flow environments of three-dimensional protuberances and the surrounding structure. Significant findings are given

Experimental program to investigate transonic flow around protuberances

Transient and steady state aerodynamic flow of turbulent boundary layers are investigated for generalized cylindrical projections and several specific configurations used on the Saturn 5 launch vehicle. A transonic wind tunnel gave generalized information

Declarative Specification

Deriving formal specifications from informal requirements is extremely difficult since one has to overcome the conceptual gap between an application domain and the domain of formal specification methods. To reduce this gap we introduce application-specific specification languages, i.e., graphical and textual notations that can be unambiguously mapped to formal specifications in a logic language. We describe a number of realised approaches based on this idea, and evaluate them with respect to their domain specificity vs. generalit

Deep Impact: China and the World Economy

Much of the debate about the impact of China on the international political economy arises from the many dimensions of the potential impact and the lack of historical precedent for such a large change. This paper provides some context for thinking about these issues by contrasting China’s recent expansion with the USA at the end of the last great wave of globalization, and reviewing recent quantitative modelling of China’s growth on other countries. It argues that China’s growth is good for the world economy with significant terms-of-trade gains being experienced in its trading partners, reductions in poverty and increases in living standards. Nevertheless it also suggests we should be cautious in predicting China’s future role in the world economy. It still commands only a fraction of the spending power of the USA and further growth will require China to embrace good institutions and continue the move to a more market-based economy.Economic Growth, India, Growth Accounting, Investment, Productivity

Deciphering The Hindu Growth Epic

India’s investment rate has increased fourfold since 1950 and is now nearly 40% of GDP. Many studies have suggested that this rising investment rate is the most significant component of India’s growth acceleration. I assess these hypotheses using the neoclassical growth model decomposition method. Unlike other methods based on this model, such as Hall and Jones (QJE 1999), the method used in this paper does not rely on the assumption of steady state. I find that the rise in investment rates since the 1970s explains only 30% of India’s growth over that period. I conclude that, notwithstanding the high investment rates, the main source of India’s growth acceleration is the modest upward trend in productivity growth since the 1970s.Economic Growth, India, Growth Accounting, Investment, Productivity

Reflections on Australia’s Skilled Migration Policy

This paper outlines some recent points of debate over the economic impact of skilled migration on Australia. It is argued that the national gains from an increase in skilled immigration are likely to be small but there are significant effects on income distribution. Recent general equilibrium modeling results are used to show that the skill based immigration programme is a blunt instrument for targeting particular skills needs and may have many potential unintended consequences including the “crowding-out” of higher education in Australia.Migration; Skilled immigration; Human capital; Education