• 대한전자공학회논문지SD
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• 제41권7호
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• pp.21-29
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• 2004

본 논문에서는 Dual oxide를 갖는 Nano-scale CMOSFET에서 각 소자의 Hot carrier 특성을 분석하여 두 가지 중요한 결과를 나타내었다. 하나는 NMOSFET Thin/Thick인 경우 CHC stress 보다는 DAHC stress에 의한 소자 열화가 지배적이고, Hot electron이 중요하게 영향을 미치고 있는 반면에, PMOSFET에서는 특히 Hot hole에 의한 영향이 주로 나타나고 있다는 것이다. 다른 하나는, Thick MOSFET인 경우 여전히 NMOSFET의 수명이 PMOSFET의 수명에 비해 작지만, Thin MOSFET에서는 오히려 PMOSFET의 수명이 NMOSFET보다 작다는 것이다. 이러한 분석결과는 Charge pumping current 측정을 통해 간접적으로 확인하였다. 따라서 Nano-scale CMOSFET에서의 NMOSFET보다는 PMOSFET에 대한 Hot camel lifetime 감소에 관심을 기울여야 하며, Hot hole에 대한 연구가 진행되어야 한다고 할 수 있다.

• 농촌지도와개발
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• 제18권2호
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• pp.281-313
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• 2011

67.82% of domestic hot springs are in rural areas. (Ministry of Public Administration and Security statistics, 2010) Most of hot spring's facilities are aging and inability to accommodate the current changes of leisure patterns. So, a decrease of the number of visitor to the hot spring resulted in economic decline of rural areas. Hot spring has been studied, but Architecture of Hot Springs has never been interested in and research. Therefore, Nation architecture of Hot spring and foreign architecture was compared and analyzed. Then, Architectural characteristics of Hot spring in rural areas was identify. The architecture of Hot spring type of foreign and images are routinely burned, the organic form and old-fashioned adrift. However, our country found in Hot spring architecturally and daily life had any features. Thus, the country's hot springs spa area for construction of the architecture design should be characterized. And, through institutional guidelines and deliberations should be provided in the right direction.

• Design & Manufacturing
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• 제6권1호
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• pp.39-44
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• 2012

Hot tool steel, in general, has not been used as a material in hot forging. However such a hot tool steel is recently applied to forging materials by recent forging technology. DH32 is known as a kind of hot tool steels, which is developed for characteristics of excellent strength and toughness in high temperature. Feasibility of DH32 to hot forging material has been researched to develop the hot forging technology of a plunger used for a large-sized marine fuel pump. Hot compression experimental works were performed to investigate the hot strain characteristic of DH32 and with the experimental results FE simulations were also conducted for the design of forging processes and preform. It is found out through the hot compression experimental works that DH32 has a hot brittleness at more than $1150^{\circ}C$.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1997년도 추계학술대회논문집
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• pp.115-118
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• 1997

Recently, hot rolling oil lubrication technology is required to face with the new environments such as the rapid introduction of high wear resistent high speed steel roll the development of continuous hot rolling technology. In the hot strip mill, according to rolling and quality required conditions are constrict, Roll material of hot rolling finishing stand is changing Hi-Cr Roll to High Speed Steel [HSS] Roll. The problem of HSS Roll of roll force and strip scale defects are increasing in hot strip mill, So we have tested HSS Roll in hot rolling simulator as rolling condition, rolling speed, draft, hot oil concentration. To reduce roll force and prevent scale defects. We get some merit rolling force, rolling torque, roll wear reduction, roll and strip surface roughness and hot rolling critical oil concentration 0.4%. Finally we are going to investigate the effect of hot rolling oil of on rolling with HSS Roll.

• Journal of Magnetics
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• 제11권3호
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• pp.103-107
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• 2006

In grain oriented electrical steel process, hot band annealing has thought to be essential for obtaining good magnetic properties. New hot rolling method of heavy reduction in early hot rolling stage was applied to obtain good magnetic properties in GO process without hot band annealing. Hot rolling was carried out by varyinghot rolling reduction distribution along hot rolling pass. The heavy hot rolling reduction in rear stand improves the magnetic flux density in the case of no hot band annealing. The hot band specimens of the heavy reduction in front stand shows the elongated hot deformed microstructures in the center layer and strong {001}<110> texture.On the contrary, the heavily reduced specimens in rear stand shows the recrystallization in the center layer of hot band and strong {111}<112> and {110}<001> textures.

• 전자공학회논문지 IE
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• 제45권4호
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• pp.7-10
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• 2008

본 연구에서는 load-pull 장비를 이용하여 hot carrier 현상에 따른 RF 전력 성능 저하를 측정 분석하였다. 스트레스를 인가한 주에 RF 전력 지수들은 감소하였으며, 고정 전압 조건에서 관찰한 SOIl MOSFET의 DC 성능 지수들 또한 hot carrier stress로 인하여 감소함을 할 수 있었다. 또한 Hot carrier stress로 인한 DC 성능 저하로 인하여 RF 전력 성능 저하의 감소를 알 수 있었다.

• 한국안전학회지
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• 제27권2호
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• pp.7-12
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• 2012

This paper describes electrical fire on electric pad caused by defect of hot wires. We analyzed two type electric pad using by carbon type hot wire and magnetic shielded type hot wire. First, a carbon type hot wires electric pad is virtually impossible to connect hot wire as a method of electrical welding or soldering. In order to connect between hot wires, that has to splice carbon type material connector. If junction of hot wires was occurrence of poor connection on electric pad, it increase contact resistance on this junction point. With increasing contact resistance, junction of hot wires on electric pad generates local heating and finally leads to electrical fire. An electric pad using by a magnetic shielded type hot wire happened local heating on signal wire for sensing temperature-rise caused by applying current for magnetic shielded. With increasing local heating of signal wire, insulated coating of hot wire was melted. Finally the magnetic shielded type hot wire electric pad lead to electrical fire with breakdown between signal wire and hot wire. In this paper, we analyzed shape of damage in hot wire caused by electrical local heating and investigated fire cause on electric pad due to defect of hot wires.

• 대한통합의학회지
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• 제11권4호
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• pp.189-198
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• 2023

Purpose: This study aims to investigate the preferences of hot spring users regarding the utilization of Asan's hot springs after the COVID-19 pandemic. Methods: A survey was conducted on 340 hot spring users visiting hot spring resorts in the Onyang, Dogo, and Asan hot spring districts. The survey was conducted twice from November 5th to November 7th, 2021, and from May 25th to 26th, 2022. The survey included general questions, such as the frequency of hot spring usage, the purpose of visits, and the intention for future visits. Specific questions were related to Asan hot springs, focusing on the reasons for choosing Asan, its perceived advantages, and improvement suggestions. Results: The survey revealed that the average number of visits to hot springs was less than five in the past five years, and the main reason for visiting was to recover from fatigue. A percentage of respondents said they would use hot springs more often when the COVID-19 pandemic ends. When asked about their reasons for visiting Asan hot springs, responses varied by age. However, across all groups, the majority considered "good water" as an advantage of Asan hot springs, while improvements to "hot spring facilities" was the highest response among all age groups. Thus, despite the decline in the number of customers due to COVID-19, the overall perception of hot springs remains positive. This suggests a promising future for the hot spring industry, with the potential for a return to pre-pandemic usage levels. Conclusion: These results provide valuable foundational data for informing policy development aimed at revitalizing the hot spring industry in the post-COVID-19 era.

• 동아시아식생활학회지
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• 제25권5호
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• pp.842-849
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• 2015

The purpose of this study was to determine the optimal mixing ratio of hot-air dried loquat leaf powder and optimum conditions for making Jeolpyun containing hot-air dried loquat leaf powder (LLP). Samples of Jeolpyun were prepared with different contents of hot-air dried LLP (0%, 3%, 6%, 9%, 12%) followed by analysis of chemical properties, moisture contents, color, mechanical quality characteristics, amylograph, and sensory tests. Chemical analysis showed that hot-air dried LLP consisted of 11.41% water, 8.34% crude protein, 1.90% crude fat, 7.74% crude ash, and 16.95% crude fiber, with $^{\circ}Brix$ of 2.07, and pH of 5.78. Moisture contents of samples ranged from 52.22 to 50.06%. L-value decreased with addition of hot-air dried LLP, whereas a-value increased with increasing amount of hot-air dried LLP, and no significant differences were observed regarding b-value. In the mechanical evaluation of physical properties, hardness deceased with increasing amount of hot-air dried LLP. The starting temperature amylograph of Jeolpyun was higher in samples with hot-air dried LLP than those without hot-air dried LLP. Set back was slower with increasing amount of hot-air dried LLP, an increasing amount of hot-air dried LLP made set back of Jeolpyun slower. In the sensory test, Jeolpyun with 6% hot-air dried LLP was the most preferred with less bitterness and proper softness, moisture and chewiness. Therefore, addition of 6% hot-air dried LLP to Jeolpyun made with rice flour showed the best overall preference. Based on the results of this experiment, samples with hot-air dried LLP showed slower hardening than those without hot-air dried LLP in textural changes during storage, and Jeolpyun with 6% hot-air dried LLP is expected to increase quality and preference of Jeolpyun.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2009년도 추계학술대회 논문집
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• pp.375-378
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• 2009

Hot press forming is a new forming process which also names as hot stamping. It can greatly enhance the formability of forming parts. This paper researches the formability of boron steel sheet in hot bending process which is a kind of hot press forming. In the text, the influence of hot press forming processing parameters, such as the heating temperature, blank holding force, punch speed and punch and die radius, on the mechanics properties and microstructure of the hot bending parts was analyzed by tension test and the metallographic observation on the parts with various processing parameters. The relationship between blank holding force and punch load was also presented.