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Choking and Excelling at the Free Throw Line
Darrell A. Worthy,Arthur B. Markman,W. Todd Maddox 대한사고개발학회 2009 The International Journal of Creativity & Problem Vol.19 No.1
Psychological research suggests that trying to avoid a negative outcome and trying to attain a positive outcome have different effects on performance (Higgins, 1997). We explored this prospect by examining free throw performance among NBA basketball players at the ends of games when the player’s team was ahead or behind in a clutch situation. Players tended to shoot worse than their career average when their team was behind or when their team was ahead by one point. In contrast, players tended to shoot better than their career average when the game was tied. Thus, the point margin affected a player’s likelihood of choking or excelling under pressure. This research provides a novel real-world analysis of the phenomenon of choking under pressure that could guide and motivate future research.
LEAP, DARRELL I,KOO, MIN HO 公州大學校 基礎科學硏究所 1998 自然科學硏究 Vol.7 No.-
Based on the body-fitted coordinate (BFC) method, a three-dimensional finite difference computer'code, BFC3DGW, was developed to simulate groundwater flow problems. Methodology and solution procedures of the BFC method for simulating groundwater flows, particularly when the flow domain is stationary as in the case of confined aquifers, arc described. The code was verified by comparing numerical results with analytical solutions for well-flow problems in an isosceles right-triangular aquifer. An example simulation is made to demonstrate capability of the code for solving flow problems in anisotropic aquifers where directions of anisotropy change continuously. The method differs from the conventional finite difference method (FDM) in the ability to use a flexible, nonorthogonal, and body-fitted grid. The main advantages of the method are the convenience of grid generation, the simplified implementation of boundary conditions, and the capability to construct a generalized computer code which can be consistently applied to problem domains of any shape.
송근호,Darrell L. Smith 한국국방연구원 2022 The Korean Journal of Defense Analysis Vol.34 No.1
This study aims to investigate the impact of space competition on the security, science and technology, and military power of the two Koreas by examining the space development process of the two Koreas in terms of the times. In addition, by evaluating the space power of South Korea and North Korea, I would like to propose how to respond to threats to space competition between the two Koreas and a future space power development plan for South Korea. This study will contribute to strengthening Korea’s security in outer space by comparing and studying the space power of the two Koreas through analysis of space development and suggesting South Korea’s countermeasures to potential space threats. It will also present a new perspective on space development and space competition between the two Koreas by examining space development and space competition, which were studied mainly by the United States, Russia, China, and Japan, major powers on the Korean Peninsula.
Message in a Bottle: Chemical Biology of Induced Disease Resistance in Plants
Karl Schreiber,Darrell Desveaux 한국식물병리학회 2008 Plant Pathology Journal Vol.24 No.3
The outcome of plant-pathogen interactions is influenced significantly by endogenous small molecules that coordinate plant defence responses. There is currently tremendous scientific and commercial interest in identifying chemicals whose exogenous application activates plant defences and affords protection from pathogen infection. In this review, we provide a survey of compounds known to induce disease resistance in plants, with particular emphasis on how each compound was originally identified, its putative or demonstrated mechanism of defence induction, and the known biological target(s) of each chemical. Larger polymeric structures and peptides/proteins are also discussed in this context. The quest for novel defence-inducing molecules would be aided by the capability for high-throughput analysis of candidate compounds, and we describe some issues associated with the development of these types of screens. Subsequent characterization of hits can be a formidable challenge, especially in terms of identifying chemical targets in plant cells. A variety of powerful molecular tools are available for this characterization, not only to provide insight into methods of plant defence activation, but also to probe fundamental biological processes. Furthermore, these investigations can reveal molecules with significant commercial potential as crop protectants, although a number of factors must be considered for this potential to be realized. By highlighting recent progress in the application of chemical biology techniques for the modulation of plant-pathogen interactions, we provide some perspective on the exciting opportunities for future progress in this field of research.