Revised Huang-Yang multipolar pseudopotential

A number of authors have recently pointed out inconsistencies of results obtained with the Huang-Yang multipolar pseudo-potential for low-energy scattering [K. Huang and K. C. Yang, Phys. Rev. A, v 105, 767 (1957); later revised in K. Huang, ``Statistical Mechanics'', (Wiley, New York, 1963)]. The conceptual validity of their original derivation has been questioned. Here I show that these inconsistencies are rather due to an {\em algebraic} mistake made by Huang and Yang. With the corrected error, I present the revised version of the multipolar pseudo-potential

How do you make a time series sing like a choir? Using the Hilbert-Huang transform to extract embedded frequencies from economic or financial time series

The Hilbert-Huang transform (HHT) was developed late last century but has still to be introduced to the vast majority of economists. The HHT transform is a way of extracting the frequency mode features of cycles embedded in any time series using an adaptive data method that can be applied without making any assumptions about stationarity or linear data-generating properties. This paper introduces economists to the two constituent parts of the HHT transform, namely empirical mode decomposition (EMD) and Hilbert spectral analysis. Illustrative applications using HHT are also made to two financial and three economic time series.business cycles; growth cycles; Hilbert-Huang transform (HHT); empirical mode decomposition (EMD); economic time series; non-stationarity; spectral analysis

Extending the gaia methodology for the design and development of agent-based software systems

Over the past decade, agent-based computing has emerged as a new and popular paradigm for design, implementation and analysis of distributed information systems. In this paper, the participant researchers in Health Care Computing Group at University of Westminster concentrate on the agent-oriented methodology for the analysis and design of agentbased systems and identify how methodology can support both the levels of "agent structure" and of "agent society" in the agent-oriented software design and development process. The research reported here takes one leading agent-oriented methodology-Gaia, and then extended it by the creation of innovative design tools which aimed at better supporting application to real-world domains. In discussion section, agent-oriented methodology and AUML approaches are compared and evaluated in great detail; the strengths and weaknesses of the current agent-oriented methodology are explored and discussed; the importance of effectively using methodology to improve agents and their productivity potential also is emphasized. Finally, we draw conclusions from the work presented and the experience gained in this research and look into the future possible improvements on agent-oriented software engineering in the agent technology research field

Regional Economic Development: Current Issues 2010-11

The Sichel Series is codirected by Professors Wei-Chiao Huang and Huizhong Zhou, and is cosponsored by the W. E. Up john Institute for Employment Research, College of Arts and Sciences, and Timothy Light Center for Chinese Studies at the Diether H. Haenicke Institute for Global Education at WMU. It is named for longtime WMU economics professor, Dr. Werner Sichel, who retired in 2004. This series also coincides timely with the founding of Timothy Light Center for Chinese Studies at Western Michigan University

USA v. Huang

USDC for the District of New Jerse

Human Capital and Economic Development 1992-93

Human Capital and Economic Development is the twenty-ninth Annual Public Lecture Series organized by the Department of Economics at Western Michigan University. This year\u27s series, which aims to explore the role of Human Capital in Economic Development from the national and international dimensions, is co-directed by Professors Sisay Asefa and Wei-Chiao Huang of the WMU Economics Department, and is co-sponsored by the W. E. Upjohn Institute for Employment Research. All lectures are open to the public and no admission is charged. A question and answer session will follow each lecture

Huang v. BP Amoco Corp

United States District Court for the Eastern District of Pennsylvani