Using DDC to create a visual knowledge map as an aid to online information retrieval

Selection of search terms in an online search environment can be facilitated by the visual display of a knowledge map showing the various concepts and their links. This paper reports on a preliminary research aimed at designing a prototype knowledge map using DDC and its visual display. The prototype knowledge map created using the Protæ#169;gæ#169; and TGViz freeware has been demonstrated, and further areas of research in this field are discussed

100 years of Einstein's theory of Brownian motion: from pollen grains to protein trains

Experimental verification of the theoretical predictions made by Albert Einstein in his paper, published in 1905, on the molecular mechanisms of Brownian motion established the existence of atoms. In the last 100 years discoveries of many facets of the ubiquitous Brownian motion has revolutionized our fundamental understanding of the role of {\it thermal fluctuations} in the exotic structures and complex dynamics exhibited by soft matter like, for example, colloids, gels, etc. The domain of Brownian motion transcends the traditional disciplinary boundaries of physics and has become an area of multi-disciplinary research. Brownian motion finds applications also in earth and environmental sciences as well as life sciences. Nature exploits Brownian motion for running many dynamical processes that are crucial for sustaining life. In the first one-third of this article I present a brief historical survey of the initial period, including works of Brown and Einstein. In the next one-third I introduce the main concepts and the essential theoretical techniques used for studying translational as well as rotational Brownian motions and the effects of time-independent potentials. In the last one-third of this article I discuss some contemporary problems on Brownian motion in time-dependent potentials, namely, {\it stochastic resonance} and {\it Brownian ratchet}, two of the hottest topics in this area of interdisciplinary research.Comment: 15 pages, LATEX, Based on the inaugural lecture in the Horizon Lecture Series organized by the Physics Society of I.I.T. Kanpur, in the "World Year of Physics 2005

Speculative Attacks or Economic Fundamentals: Evidence from the Asian Currency Crisis

This paper argues that what led to the Asian financial crisis was a fatal combination of several self-reinforcing factors including external sector weaknesses, fragility in domestic financial markets due to inadequately administered financial liberalisation, loss of confidence, and short-term capital flows, maturing within less than a year and denominated in unhedged dollars. Some of these factors were country-specific while others were common to the entire region. Asia\u27s financial crisis will almost certainly lead to important changes in the international financial system, as countries try to find an appropriate balance between the benefits from gaining access to intentional capital flows and the potential for instability and ohter risks that also seem to be much greater in a world of large and highly mobile capital movements. The paper discusses important lessons from the crisis

(WP 2013-07) Terms of Trade Shocks and Private Savings in the Developing Countries

Economic agents in the developing countries are subject to tight credit constraints, which are more pronounced during bad state of nature. Thus, adverse shocks to commodity prices in the world market can force them to reduce savings by a larger amount than they would otherwise have. Empirical analysis using a dynamic GMM model and data from 45 developing countries confirm that most of the determinants of savings identified in the literature also apply to the developing countries. The transitory component in the terms of trade have a larger positive impact than the permanent component. This reflects the lack of access to foreign borrowing. Although the impact of terms of trade shocks is found to be asymmetric, the magnitude of the impact appears to be relatively small. The results are robust for alternative estimators, determinants and country groupings

(WP 2011-06) Do Stock Market Risk Premium Respond to Consumer Confidence?

During the 2007-9 Great Recession, the risk premium associated with U.S. stocks sharply increased and has since remained significantly higher compared to its range during the last 40 years. The increase in the equity risk premium has led many analysts to believe that risk aversion among stock investors has moved to a permanently higher range in recent years. Our empirical findings show that the recent increase in the equity risk premium primarily reflects a temporary collapse in consumer confidence. As long as the consumer confidence in the sustainability of economic recovery remains low, today\u27s elevated risk premium would persist. Once the confidence level starts to recover - as it has done after every recession since the 1960s - the required return among stock market investors should also diminish