• 대한기계학회논문집B
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• 제23권2호
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• pp.272-280
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• 1999

A cycle analysis was achieved to predict the characteristics by comprehensive modeling and simulation of an air-cooled, double-effect absorption system using a new $H_2O/LiBr+HO(CH_2)_3OH$ solution. The simulation results showed that the new working fluid may provide the crystallization limit 8% higher than the conventional $H_2O/LiBr$ solution. With a crystallization margin of 3wt%(weight%), the optimal solution distribution ratio was found in the range of 36 to 40%. Variation of cooling air Inlet temperature has a sensitive effect on the cooling COP and corrosion problem. The simulation of heat exchangers with UA value revealed that the absorber and the evaporator are relatively important for an air-cooled system compared with the condenser and the low temperature generator. The effect of cooling air flow rate, circulation weak solution flow rate and chilled water inlet temperature were also examined. The new working fluid may provide the COP approximately 5% higher than the conventional $H_2O/LiBr$ solution.

• JSTS:Journal of Semiconductor Technology and Science
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• 제13권3호
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• pp.245-251
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• 2013

The effect of band-to-band tunneling (BTBT) leads to an obvious increase of the leakage current of junctionless (JL) transistors in the OFF state. In this paper, we propose an effective method to decline the influence of BTBT with the example of n-type double gate (DG) JL metal-oxide-semiconductor field-effect transistors (MOSFETs). The leakage current is restrained by changing the geometrical shape and the physical dimension of the gate of the device. The optimal design of the JL MOSFET is indicated for reducing the effect of BTBT through simulation and analysis.

• 한국의류학회지
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• 제27권11호
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• pp.1260-1269
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• 2003

This paper endeavors to examine the most suitable formal dress design for mid-aged men who lives in Kwangju, the Republic of Korea. Visual effect in associate design is considered with adjustment, figured and the body type. There are partly similarity differences in associate design visual effect by one's shape and clothes design. Firstly, in thin type, striped figured suit is the most attractive. Single adjustment suit with striped figured tend to be attractive, young and modernistic. Single adjustment without figured is felt the mellowest. Secondly, in standard type, the suit without figured is perceived the most attractive and masculine. The suit with striped figured is looked more young. Single adjustment suit without figured is the most attractive and mellow also single adjustment with figured is felt the youngest. Double adjustment without figured is felt mellow and with striped figured is felt the most modernistic and familiar. Also double adjustment suit with check figured is felt more modernistic. Thirdly, in pyknic type, the solid figured and striped figured of the suits are felt more masculine and single without figured is thought attractive. Single adjustment with check figured is common image. Also, double adjustment with stripe figured is perceived attractive. In conclusion, the adjustment, number of button and figure are very important facts for the clothes for giving whole visual effect of men's suit.

• 한국축산식품학회지
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• 제35권2호
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• pp.248-257
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• 2015

Effects of double packaging (combinational use of aerobic and vacuum conditions) and antioxidants on physicochemical properties in irradiated restructured chicken rolls were determined. Chicken breast treated with antioxidants (none, sesamol+a-tocopherol) was used to process restructured chicken breast rolls. The sliced rolls were vacuum, aerobic, or double packaged (vacuum for 7 d then aerobic for 3 d) and electron beam irradiated at 2.5 kGy. Color, 2-thiobarbituric acid reactive substances (TBARS), oxidation reduction potentials (ORP), and volatile profiles of the samples were determined at 0 and 10 d. Irradiation made restructured chicken rolls redder (p<0.05), and the increased redness was more distinct in irradiated vacuum-packaged than irradiated aerobic or double packaged meats. TBARS values of antioxidant-treated double packaged rolls were lower than even nonirradiated vacuum-packaged meat, and those were distinct at 10 d (p<0.05). ORP and lipid oxidation values were lower in irradiated vacuum and double packaged samples than those in irradiated aerobic packaged ones at 0 d (p<0.05). Irradiation of restructured chicken rolls increased the amount of total volatiles. Considerable amounts of off-odor volatiles were reduced or not detected by double packaging and antioxidant treatment at 10 d. Therefore, the combined use of antioxidants and double packaging would be useful to reduce redness and control the oxidative quality changes of irradiated restructured chicken rolls

• 생물환경조절학회지
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• 제17권4호
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• pp.312-318
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• 2008

추황배'에서 칼슘이 코팅된 이중봉지를 이용하여 봉지 물성, 미기상, 과실로의 칼슘 축적 및 과실품질에 미치는 영향을 조사하였다. 칼슘처리봉지는 관행봉지와 비교하여 투광율, 인장강도, 온도 및 상대습도는 차이가 없었다. 그러나 칼슘처리 봉지의 과피내 칼슘 함량은 만개 후 65일 부터 160일 까지 관행 봉지보다 현저히 많았다. 그러나 과육에서는 160일에서만 증가되었다. 칼슘처리 농도별 과실내 칼슘함량은 과피에서는 황색이중봉지 12%, 신문이중봉지 9, 12%에서 높았고 과육에서는 황색이중봉지 3%, 신문이중봉지 6, 9, 12%에서 현저히 높았다. 방사성 등위원소를 이용한 과피 및 과실로의 칼슘 축적은 과피는 처리 후 60시간까지 증가였으나 과육 조직은 무처리 과피와 큰 차이는 없었다. 수확시 과실경도는 황색이중봉지는 농도 간 큰 차이는 없었으나, 칼슘 6, 12%처리 신문이중봉지에서 현저한 차이를 보였다. 가용성고형물은 칼슘 6, 9%처리 황색이중봉지와 3, 6, 9%처리 신문이중봉지에서 현저히 높았다. 그러나 봉지내 칼슘처리에 따른 과중 및 과피색 변화는 차이가 없었다.

• 인지과학
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• 제6권1호
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• pp.47-71
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• 1995

글자의 이중상으로 인한 심리적 혼란감을 '글자멀미'라 정의하였고,눈운동 및 글자 인식 과정이 교란될 때 글자 멀미가 발생한다는 가설을 검증하기 위하여 자극의 노출시간과 글자의 친숙도가 글자 멀미에 미치는 효과를 측정하였다.글자 멀미는 자극 노출 시간이 50ms,100ms,3000ms로 길어짐에 따라,덜 친숙한 외국 문자보다는 친숙한 한글에서 유의미한 단어보다는 무의미한 단어에서 큰것으로 나타났다.이러한 실험발견은 이중상을 제거하려는 눈 운동이 실효를 거두지 못함에 따라 글자 멀미가 발생한다는 것,친숙한 글자일수록 글자 인식 과정의 개입을 더 강화하며 그결과 이중상에 의한 교란 효과가 증폭된다는것,글자 형태는 친숙하지만 의미추출이 어렵게 되면 이중상의 교란효과가 가중된다는 것을 암시한다.의미를 처리하는 경향이 클수록 이중상에 의한 글자 멀미가 심해진다는 가설을 좀 더 분명히 검증하기 위하여 여섯 개의 점으로 구성된 점자를 시각적으로 인식하도록 피험자들을 학습시킨 결과,학습율이 증가함에 따라 글자 멀미가 증가하는 것으로 나타나, 하나의 자극을 의미있는 상징으로 취급하여 해석하려 할때 글자멀미가 증가한다는 결론을 얻었다.

• 대한통합의학회지
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• 제5권2호
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• pp.25-32
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• 2017

Purpose : The purpose of this study was to determine the effect of ribcage stabilization using a belt in the supine position during double leg lowering (DLL) by investigating the electromyographic (EMG) activities of the abdominal muscles. Methods : Twenty-two subjects with lumbar extension syndrome were recruited. EMG activity was recorded from rectus abdominalis (RA) and internal oblique abdominalis (IO), external oblique abdominalis (EO) muscles while subjects performed three double leg lowering exercises: double leg lowering (DLL), double leg lowering with abdominal draw-in maneuver (DLL-ADIM), and double leg lowering with ribcage stabilization using a belt (DLL-belt). RA, IO, and EO EMG activity were analyzed via one-way repeated-measures analysis of variance (ANOVA). Bonferroni correction was performed where significant differences were identified (p<.017, .05/3). Results : RA, IO, and EO EMG activity differed significantly among the three exercises (p<.05). The use of post hoc pair-wise comparison with Bonferroni correction showed that RA muscle activity significantly differed among the three exercises (p<.017), and IO muscle activity in the DLL exercise was significantly decreased compared to the DLL-ADIM and DLL-belt exercises (p<.017). There was no significant difference between IO muscle activity for DLL-ADIM and DLL-belt exercises (p>.017). EO muscle activity in the DLL-belt exercise was significantly increased compared to both DLL and DLL-ADIM exercises (p<.017), but there was no significant difference between EO muscle activity for DLL and DLL-ADIM exercises (p>.017). Conclusion : DLL-belt is a more effective exercise for activating the abdominal muscles than DLL-ADIM exercise. Therefore, we recommend DLL-belt exercises for strengthening the abdominal muscles.

• Radiation Oncology Journal
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• 제13권2호
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• pp.113-120
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• 1995

Purpose : To investigate the effect of alkaloid fraction from Korean ginseng on radiation-induced DNA double strand breaks (dsb) formation and repair in murine lymphocytes Materials and Methods : We used the neutral filter elution technique to assay $^{60}Co\;{\gamma}$ ray-induced DNA double strand breaks formation and repair in C57BL/6 mouse spleen lymphocytes for evaluating the dose-response relationship in the presence of alkaloid fraction as a radioprotective agent. The lymphocytes were stimulated with Phytohemagglutinin (PHA, 2 u g/ml) to label $^3[H]-thymidine.$ Isotope-labelled lymphocytes in suspension were exposed to 100 Gy at $0^{\cdot}C$ in the alkaloid fraction-treated group and elution procedure was performed at PH 9.6. The extents of formation of radiation-induced DNA double strand breaks and repair were compared respectively via strand scission factor (SSF) and relative strand scission factor (RSSF). Results: Alkaloid fraction reduced the formation of double strand breaks with dose modification factor of 2 15, compared to control group Rejoining of DNA dsb appeared to take place via two components. The first fast component was completed within 20.4 minutes, but the second slow component was not completed until 220.2 minutes after irradiation. About $30\%$ of dsb formed by irradiation was ultimately unrejoined despite the administration of alkaloid fraction. The administration of alkaloid fraction had a great effect on the second slow component of repair; the half-time of fast component repair was not changed, but that of slow component was 621.8 minutes. Conclusion: Neutral filter elution assay Proved to be a very effective method to quantitate the extents of DNA dsb formation and its repair. By using this technique, we were able to evaluate the efficiency of alkaloid fraction from Korean ginseng as a valuable radioprotector. Alkaloid fraction can be used prophylactically to prevent or ameliorate the severe radiation damages in workers and neighbors around the atomic power plants. For more refined study, however, more advanced purification of alkaloid fraction wil be needed in the near future.

• 대한전기학회논문지:전력기술부문A
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• 제50권1호
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• pp.38-44
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• 2001

For double-circuit transmission line systems, an accurate digital distance relaying algorithm immune to the reactance effect is proposed. The apparent impedance calculated by the distance relay is influenced by the combined reactance effect of the fault resistance and the load current as well as the mutual coupling effect caused by the zero-sequence current of the adjacent parallel circuit. To compensate the magnitude and phase of the estimated impedance, this algorithm uses phase angle difference between the zero(positive) sequence of the both side of the system seperated by the fault point. The impedance measuring algorithm presented used a current distribution factor to compensate mutual coupling effect instead of the collected zero-sequence current of the adjacent parallel circuit.

• JSTS:Journal of Semiconductor Technology and Science
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• 제4권1호
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• pp.27-31
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• 2004

Models and simulations of gate tunneling current for thinoxide MOSFETs and Double-Gate SOIs are discussed. A guideline in design of leaky MOS capacitors is proposed and resonant gate tunneling current in DG SOI simulated based on quantum-mechanicalmodels. Gate tunneling current in fully-depleted, double-gate SOI MOSFETs is characterized based on quantum-mechanical principles. The simulated $I_G-V_G$ of double-gate SOI has negative differential resistance like that of the resonant tunnel diodes.