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Your search keyword '"Lee, Y-H"' showing total 2,405 results
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2,405 results on '"Lee, Y-H"'

1. Status of the RAON heavy-ion accelerator

Author

Chung, Y. S., Kang, J., Kwon, M., Kwon, E., Kwon, J. W., Kim, G. D., Kim, D. G., Kim, M. S., Kim, S., Kim, Y., Kim, Y. H., Kim, Y., Kim, J. W., Kim, J., Kim, H., Kim, H. J., Kim, H., Do, H., Park, M. J., Park, B. S., Park, I., Park, H., Bae, S. Y., Baek, B. Y., Seo, C. S., Seol, K. T., Son, K. T., Son, C., Son, H. J., Shin, J. H., Ahn, Y., Yang, K. S., Woo, H. J., Yoo, J. H., Yoon, J., Lee, D. Y., Lee, M. K., Lee, S. -. G., Lee, Y. H., Lee, J. W., Lee, J., Lim, E. H., Jang, J. H., Jang, H. M., Jang, H., Jeon, D., Jeon, S., Jung, Y., Jung, H. C., Jo, K. H., Jo, H. C., Jo, Y. W., Cho, J. H., Joo, J. D., Jin, H., Choi, S., Choi, O., Choi, Y. J., Choi, J. W., Choi, C. J., Han, J., Heo, J. I., Hyun, M. O., Hong, I. S., Ki, T., Kim, D. M., Moon, S., Yoon, S., Lee, S., and Choi, H. S.

Published
2024
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3. A sustained high-temperature fusion plasma regime facilitated by fast ions

Author

Han, H., Park, S. J., Sung, C., Kang, J., Lee, Y. H., Chung, J., Hahm, T. S., Kim, B., Park, J.-K., Bak, J. G., Cha, M. S., Choi, G. J., Choi, M. J., Gwak, J., Hahn, S. H., Jang, J., Lee, K. C., Kim, J. H., Kim, S. K., Kim, W. C., Ko, J., Ko, W. H., Lee, C. Y., Lee, J. H., Lee, J. H., Lee, J. K., Lee, J. P., Lee, K. D., Park, Y. S., Seo, J., Yang, S. M., Yoon, S. W., and Na, Y.-S.

Published
2022
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20. Criterion for long sustained highly peaked ion temperature in diverted configuration of KSTAR tokamak.

Author

Han, H., Chung, J., Jeon, Y. M., Kang, J., Na, Y. S., Ko, W. H., Juhn, J. W., Jeong, J., Kim, H. S., Jang, J., Hahn, S. H., Lee, J. K., Lee, Y. H., Park, S. J., Kim, W. C., and Yoon, S. W.

Subjects
TOKAMAKS, ION temperature, NEUTRAL beams, FAST ions, PLASMA beam injection heating, MAGNETIC fields, LOW voltage systems
Abstract

In the context of KSTAR plasma research, the discovery of the fast ion regulated enhanced mode is noteworthy due to its remarkable ability to maintain ion temperatures exceeding up to 10 keV for a few tens of seconds, avoid impurity accumulation, and keep low loop voltages. This new plasma operating scenario is achieved in a diverted configuration plasma by avoiding the H-mode transitions with sufficient additional power for the transition. Keeping the density low is the primary method for the avoidance. Additionally, adjustments to other parameters (plasma shape, neutral beam injection, and toroidal magnetic field) associated with the H-mode threshold power are applied to inhibit the transition process. This paper includes an experimental analysis and discussion of these findings. [ABSTRACT FROM AUTHOR]

Published
2024
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21. The Effects of Cognitive Capacity and Gaming Expertise on Attention and Comprehension

Author

Lee, Y.-H and Heeter, C.

Abstract

Educational video games can impose high cognitive demands on its users. Two studies were conducted to examine the cognitive process involved in playing an educational digital game. Study 1 examined the effects of users' working memory capacity and gaming expertise on attention and comprehension of the educational messages. The results showed that gaming experts seem to benefit more from having a higher working memory capacity when processing information from the game. However, gaming experts' available working memory did not predict better comprehension. Instead, non-experts' available working memory predicted better comprehension. Study 2 further examined whether these results were caused by insufficient working memory allocation or different attention focus between gaming experts and non-experts. The findings suggest that gaming experts approach the game differently from non-experts, focusing on familiar features and overlooking unfamiliar (educational) information.

Published
2017
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39. Gas turbine engine health monitoring by fault pattern matching method

Author

Lee, Y. H. and Singh, R.

Subjects
621.4352, Usage monitoring system, Diagnosis
Abstract

The gas turbine engine has a wide range of applications, these include industrial and aerospace applications on locomotive, ferry, compressor and power generation, and the most popular application will be for the air transportation. The application for air transportation including military and commercial aircraft is highly sensitive to safety concerns. The engine health monitoring system plays a major role for addressing this concern, a good engine monitoring system will not only to provide immediate and correct information to the engine user but also provide useful information for managing the maintenance activities. Without a reliable performance diagnosis module involved, there will be not possible to build a good health monitoring system. There are many methodologies had been proposed and studied during past three decades, and yet still struggling to search for some good techniques to handle instrumentation errors. In order to develop a reliable engine performance diagnosis technique, a fully understanding and proper handling of the instrumentation is essential. A engine performance fault pattern matching method has been proposed and developed in this study, two fault libraries contains a complete defined set of 51963 faults was created by using a newly serviced fighter engine component data. This pattern matching system had been verified by different approaches, such as compares with linear and nonlinear diagnosis results and compares with performance sensitivity analysis results by using LTF program engine data. The outcomes from the verications indicate an encouraging result for further exploring this method. In conclusion, this research has not only propose a feasible performance diagnosis techniques, but also developed and verified through different kind of approaches for this techniques. In addition to that, by proper manipulating the created fault library, a possible new tool for analyzing the application of instruments' implementation was discovered. The author believes there will be more to study by using this created fault pattern library. For instance, this fault pattern library can be treated as a very good initial training sets for neural networking to develop a neural diagnosis technique. This study has put a new milestone for further exploring gas turbine diagnosis technique by using fault pattern related methods.

Published
1998

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