Ni-Ti actuators and genetically optimized compliant ribs for an adaptive wing

Mirone, Giuseppe Techno-Press 2009 Smart Structures and Systems, An International Jou Vol.5 No.6

Adaptive wings are capable of properly modifying their shape depending on the current aerodynamic conditions, in order to improve the overall performance of a flying vehicle. In this paper is presented the concept design of a small-scale compliant wing rib whose outline may be distorted in order to switch from an aerodynamic profile to another. The distortion loads are induced by shape memory alloy actuators placed within the frame of a wing section whose elastic response is predicted by the matrix method with beam formulation. Genetic optimization is used to find a wing rib structure (corresponding to the first airfoil) able to properly deforms itself when loaded by the SMA-induced forces, becoming as close as possible to the desired target shape (second airfoil). An experimental validation of the design procedure is also carried out with reference to a simplified structure layout.

The Political Economy of Chinese "Federalism": New Analytical Directions

Miron Mushkat,Roda Mushkat 연세대학교 동서문제연구원 2009 Global economic review Vol.38 No.1

Decentralized politico-administrative structures may be dissected and assessed by employing a variety of conceptual tools. In the case of China, researchers have displayed a distinct preference for operating within a framework grounded in political sociology. Substantial insights have been generated in the process, but it may be argued, and empirically demonstrated, that a complementary approach, seeking inspiration from political economy, may shed additional light on the functioning of the Chinese quasi-federal system.

The "Supply Side" of Social Planning

Miron Mushkat 연세대학교 동서문제연구소 1985 東西硏究 JOURNAL OF EAST AND WEST STUDIES Vol.14 No.2

THE POLITICAL ECONOMY OF STATE FAILURE

Miron Mushkat 연세대학교 동서문제연구원 2003 Global economic review Vol.32 No.1

State failure is more common than generally assumed and often has distinctly negative consequences that may manifest themselves in neighboring countries. For this reason, it has attracted considerable attention in academic and policy circles alike. The researchers exploring the phenomenon have followed a rather narrow path, however, and there is substantial scope to broaden the breadth of inquiry. While the analytical efforts over the past decade to come to grips with the phenomenon of state failure have borne fruit in terms of identifying the key independent variables, the understanding of the mechanism through which they exert their influence on the dependent variable has not been significantly enhanced. The assertion is particularly valid with respect to adverse and abrupt regime transitions. The purpose of this paper is to examine, in light of the author’s experience in grappling with state failure in the Chinese context, the potential for systematically expanding the research agenda in a conceptual/theoretical direction.

Alternative Futures and Foreign Direct Investment in China

Miron Mushkat 연세대학교 동서문제연구원 2004 Global economic review Vol.33 No.1

Chinese history is littered with sharp policy swings, and the communist era, which has not yet fully drawn to a close, has witnessed a veritable embarrassment of riches. This has provided a fertile ground for researchers engaged in crystal ball gazing. Recently, momentum has accelerated on that front, a development apparently reflecting the increasingly fluid political-economic conditions in the country. The scenarios generated can serve as an effective reference point in planning exercises, but there is scope for solidifying the conceptual architecture. The issue of rendering them highly relevant to foreign investors, presumably very important potential consumers of the product, should also be addressed.

Design and demonstrators testing of adaptive airfoils and hingeless wings actuated by shape memory alloy wires

Mirone, Giuseppe Techno-Press 2007 Smart Structures and Systems, An International Jou Vol.3 No.1

Two aspects of the design of a small-scale smart wing are addressed in this work, related to the ability of the wing to modify its cross section assuming the shape of two different airfoils and to the possibility of deflecting the profiles near the trailing edge in order to obtain hingeless control surfaces. The actuation is provided by one-way shape memory alloy wires eventually coupled to springs, Shape Memory Alloys (SMAs) being among the most promising materials for this kind of applications. The points to be actuated along the profiles and the displacements to be imposed are selecetd so that they satisfactorily approximate the change from an airfoil to the other and to result in an adequate deflection of the control surface; the actuators and their performances are designed so that an adequate wing stiffness is guaranteed, in order to prevent excessive deformations and undesired airfoil shape variations due to aerodynamic loads. The effect of the pressure distributions, calculated by way of the XFOIL software, and of the actuators loads, is estimated by FE analyses of the loaded wing. Two prototypes are then realised incorporating the variable airfoil and the hingeless aileron features respectively, and the verification of their shapes in both the actuated and non-actuated states, supported by image analysis techniques, confirms that interesting results are achievable with the proposed lay out and design considerations.

The Transfer of Property Rights from the Public to the Private Sector in Hong Kong: A Critical Assessment

( Miron Mushkat ),( Roda Mushkat ) 연세대학교 동서문제연구원 2006 Global economic review Vol.35 No.4

By

Miron Mushkat,Roda Mushkat 연세대학교 동서문제연구원 2009 Global economic review Vol.38 No.1

Decentralized politico-administrative structures may be dissected and assessed by employing a variety of conceptual tools. In the case of China, researchers have displayed a distinct preference for operating within a framework grounded in political sociology. Substantial insights have been generated in the process, but it may be argued, and empirically demonstrated, that a complementary approach, seeking inspiration from political economy, may shed additional light on the functioning of the Chinese quasi-federal system.

THE POLITICAL ECONOMY OF CHINA'S FUTURE

Miron Mushkat 연세대학교 동서문제연구원 2002 Global economic review Vol.31 No.3

The Chinese economy and political system have evolved, perhaps even matured, to a point whereby researchers within and without academia deem it appropriate to shift their attention from the immediate past, and of course the present, to the long-term future. Institutional changes, particularly WTO accession, and the challenges posed by modern technology are reinforcing this trend. The more policy sensitive of the two most ambitious exercises in crystal ball gazing, it is argued here, has yielded fascinating insights but, inevitably so given the nature of the undertaking, the questions to which it gives rise match both quantitatively and qualitatively the answers provided.

THE POLITICAL ECONOMY OF STATE FAILURE

Mushkat, Miron 연세대학교 동서문제연구원 2003 Global economic review Vol.32 No.1

State failure is more common than generally assumed and often has distinctly negative consequences that may manifest themselves in neighboring countries. For this reason, it has attracted considerable attention in academic and policy circles alike. The researchers exploring the phenomenon have followed a rather narrow path, however, and there is substantial scope to broaden the breadth of inquiry. While the analytical efforts over the past decade to come to grips with the phenomenon of state failure have borne fruit in terms of identifying the key independent variables, the understanding of the mechanism through which they exert their influence on the dependent variable has not been significantly enhanced. The assertion is particularly valid with respect to adverse and abrupt regime transitions. The purpose of this paper is to examine, in light of the author's experience in grappling with state failure in the Chinese context, the potential for systematically expanding the research agenda in a conceptual/theoretical direction.