• 한국의류학회지
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• 제25권9호
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• pp.1655-1660
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• 2001

여성의 생리주기가 행동성 체온조절에 미치는 영향을 관찰하고자, 본 연구에서는 6명의 건강한 여자대 학생을 대상으로 하여 22.5$^{\circ}C$와 55%RH의 환경에서 피험자 스스로가 의복을 선택하는 쾌적의복선택 실험과 피험자 스스로가 온도를 선택하는 쾌적 온도선택 실험을 각각 수행하였다. 평균피부온은 생리주기에 관계없이 쾌적온도선택 실험보다 쾌적의복선택 실험에서 높게 유지되었고, 생리주기에 따른 쾌적착의량과 쾌적온도의 차이는 보이지 않았다. 그러나, 6명의 피험자 중 4명의 피험자가 선택하여 착용한 착의량은 황체기보다 여포기에 더 많았고 (p<0.05), 5명의 피험자가 선택한 쾌적온도 역시 황체기보다 여포기에 평균 1.4$^{\circ}C$ 더 높은 것으로 나타났다 (p<0.01). 이러한 결과는, 피부의 온도를 조절함으로써 여포기보다 황체기에 심부체온을 높게 유지하기 위한 행동성 체온조절반응을 나타낸 것으로 보이나, 보다 명확한 결론을 내리기 위해서는 다양한 환경조건에서 다수의 피험자를 대상으로 하는 후속연구가 지속적으로 수행되어 야 할 것이다.

• 조명전기설비학회논문지
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• 제29권9호
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• pp.1-9
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• 2015

The aim of this study is to deduce color temperature and illuminance by conducting the preference & affective evaluation consequent on illuminance change of ambient light in case of the lighting method of ambient light mixed with task light in time of reading which is visual work action among the action in learning space. As a result of the prior survey on preferred lighting method in time of the act of reading targeting 20 experts before doing evaluation, the method of lighting mixed with ambient light and task light was found to be the highest. Such a result is analyzed to be attributable to the fact that the less the difference in illuminance of nearby space and work surface because of the mixed method of lighting, the less the glare, which makes a reader feels easy and concentrate on reading. On the basis of descriptive statistics of evaluation results and impact analysis by category, this study recommends the application of combinations of ambient light illuminance ranging from 40lx to 100lx with color temperature of 5500~6000K in case of the method of lighting mixed with general light and task light.

• Journal of the Korean Physical Society
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• 제73권9호
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• pp.1329-1333
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• 2018

We investigated the mechanism of mobility enhancement after the dehydrogenation process in polycrystalline silicon (poly-Si) thin films. The dehydrogenation process was performed by using an in-situ CVD chamber in a $N_2$ ambient or an ex-situ furnace in air ambient. We observed that the dehydrogenated poly-Si in a $N_2$ ambient had a lower oxygen concentration than the dehydrogenated poly-Si annealed in an air ambient. The in-situ dehydrogenation increased the (111) preferred orientation of poly-Si and reduced the oxygen concentration in poly-Si thin films, leading to a reduction of the trap density near the valence band. This phenomenon gave rise to an increase of the field-effect mobility of the poly-Si thin film transistor.

• 한국표면공학회지
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• 제29권6호
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• pp.621-627
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• 1996

$SrBi_{2x}TaO_9$ ferroelectric thin films were prepared on platinized silicon substrates using MOD proces, and crystallization behavior of the films was investigated with variation of the annealing temperature and Bi content x. Crystalline phase of bismuth layered perovskite structure was formed even by baking the films at $800^{\circ}C$ for 5 minutes in air, and was not changed by annealing at temperatures raning from $700^{\circ}C$ to $900^{\circ}C$ for 1 hour in oxygen ambient. When $SrBi_{2x}TaO_9$ thin films ($0.8\lex\ie1.6$) were annealed at $800^{\circ}C$, Preferred orientation of the films along c-axis was observed with $x\ge1.2$. With increasing Bi content x, surface morphology of the films was changed from equiaxed grains to elongated grains.

• 센서학회지
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• 제7권6호
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• pp.409-417
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• 1998

NTSC 시스템 제정 당시의 기준백색은 6774K의 CIE C 광원을 사용하였다. 그후, 일반 소비자들이 흑백 텔레비전에 대하여 보다 푸른 백색을 선호하였기 때문에 칼러 텔레비전 수상기는 기준백색으로 9300K 근처로 조정되었다. 그러나 최근의 연구에 의하면 디스플레이 백색의 색온도는 주위 조명광보다 $3000{\sim}4000K$ 정도 높게 정하는 것이 좋다고 알려져 있다. 따라서, 주위 조명광에 따른 수상기에서의 디스플레이 백색을 정하기 위하여 주위 조명광의 분류가 요구된다. 본 논문에서는 경제적이고 간단한 옐로우 및 사이안의 2 칼러 광센서를 사용하여 주위 조명광이 백열등 또는 형광등인지를 분류하는 방법을 제안하였다. 제안한 방법을 실제 실험해 본 결과, 주위 조명광이 백열등, 형광등, 및 이들의 혼합조명 상태의 판별에 매우 유용함을 확인하였다.

• 한국의류학회지
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• 제30권3호
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• pp.407-411
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• 2006

본 연구에서는 비만아동의 온도적응능력을 향상시키기 위해 초등학교 4학년$\∼$6학년에 재학 중인 비만아동 13명(남자 6명, 여자 7명)을 대상으로 하여, 10주간의 단기 의복착용훈련 프로그램을 시행한 후 프로그램의 효과를 알아보았다. 프로그램 시행기간 중 아동이 매일 직접 측정한 주택 내 실내온도는 평균 25.1$^{circ}C$였고, 아동이 착용한 체표면적당 의복의 무게(착의량)는 평균 300g/$m^{2}$였으며, 실내온도와 착의량 간에는 유의한 상관이 있었다(p < .01). 프로그램의 시행효과를 구체적으로 알아보기 위해, 23.0$\pm$0.5$^{circ}C$, 50$\pm$5$\%$RH로 조절된 인공기후실에서 실험을 실시하여, 반소매 면 티셔츠(0.13clo)와 T/C 반바지(0.09c1o)를 착용하고 안정상태에 있는 아동의 체온, 피부온, 혈압 및 맥박 등의 생리반응과 쾌적감 및 온랭감의 주관적 감각반응을 프로그램 시행 전후에 측정한 후 얻은 주요 결과는 다음과 같다. 평균피부온은 프로그램 시행전후에 유의한 차이가 없었으나, 전반적으로 체온과 평균혈압은 프로그램 시행 후에 내려갔다(p < .01). 주관적 감각반응에서는 프로그램 시행 후에 여아가 남아에 비해 약간 더 따뜻하게 느꼈고(p < .05), 이에 따라 아동자신이 선택한 쾌적온도는 더 낮은 경향을 나타내었다(p < .1). 이와 같은 연구결과는 비만아동의 행동성 및 자율성 체온조절연구에 유익할 것이나, 보다 명확한 자료를 얻기 위해서는 종합적이고 장기적인 훈련프로그램의 시행이 요구된다.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2014년도 제46회 동계 정기학술대회 초록집
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• pp.329.1-329.1
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• 2014

In this paper, we report electrical, optical and structural properties of Al-doped zinc oxide (AZO) thin films deposited at different substrate temperatures and pressures. The films were prepared by radio frequency (RF) magnetron sputtering on glass substrates in argon (Ar) ambient. The X-ray diffraction analysis showed that the AZO films deposited at room temperature (RT) and 20 Pa were mostly oriented along a-axis with preferred orientation along (100) direction. There was an improvement in resistivity ($3.7{\times}10^{-3}{\Omega}-cm$) transmittance (95%) at constant substrate temperature (RT) and working pressure (20 Pa) using the Hall-effect measurement system and UV-vis spectroscopy, respectively. Our results have promising applications in low-cost transparent electronics, such as the thin-film solar cells and thin-film transistors due to favourable deposition conditions. Furthermore our film deposition method offers a procedure for preparing highly oriented (100) AZO films.

• 한국전기전자재료학회논문지
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• 제29권2호
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• pp.95-100
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• 2016

We fabricated a tin sulfide (SnS) layer with Sn/Mo/glass layers followed by a RTP (rapid thermal processing), and studied the film growth and structural characteristics as a function of annealing temperature and time. The elemental sulfur (S) was cracked thermally and applied to form SnS polycrystalline film out of the Sn percursor at pre-determined pressures in the RTP tube. The sulfurization was done at the temperature from $200^{\circ}C$ to $500^{\circ}C$ for a time period of 10 to 40 min. At ${\leq}300^{\circ}C$, 20 min., p-type SnS thin films was grown and showed the best composition of at.% of [S]/[Sn] $${\sim_=}$$ 1 and [111] preferred orientation as investigated from using XRD (X-ray diffraction) analysis and EDS (energy dispersive spectroscopy) and SEM (scanning electron microscopy), and optical absorption by a UV-VIS spectrometer. In this paper, we report the details of growth characteristics of single phase SnS thin film as a function of annealing temperature and time associated with the pressure and ambient gas in the RTP tube.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 하계학술대회 논문집
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• pp.103-107
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• 2000

Boron Phosphide films were deposited on the glass substrate at the low temperature, 55$0^{\circ}C$, by the reaction of B$_2$H$_{6}$ with PH$_3$ using CVD. $N_2$ was employed as carrier gas. The optimal gas rates were 50 $m\ell$/min for B$_2$H$_{6}$, 50 $m\ell$/min for PH$_3$ $m\ell$/min and 1.5 $\ell$/min for $N_2$. To investigate the annealing effect, the films were annealed for 1hour, 3hours in $N_2$ambient at 55$0^{\circ}C$ and tested. The deposition rate was 1000$\AA$/min and the refractive index of film was 2.6. The measurement of X-RD shows that the films have the preferred orientation of (1 0 1) and the intensity of the peak for (1 0 1) orientation decreases according to the annealing time. The data of VIS spectrophotometer proved that the films are transparent in the visible range and the maximal transmittance increases according to the annealing time; 75.49% for as-deposited, 76.71% for 1hr-annealed and 86.4 % for 3hrs-annealed. The measurement of AFM shows that the average surface roughness increases according to the annealing time; 73$\AA$ for as-deposited, 88.9$\AA$ for 1hr-annealed and 220$\AA$ for 3hrs-annealed. Also, The data of the secondary electron emission rate(Υ) shows that the secondary electron emission rate increases according to the annealing time; 0.317 for 1hr-deposited, 0.357 for 1hr-annealed and 0.537 for 3hrs-annealed. And, The measurement of FT-IR that the characteristic of transmittance in the infrared range was stabilized through annealing.ing.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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• pp.169-169
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• 2016

In this paper, we report electrical, optical and structural properties of Al-doped zinc oxide (AZO) thin films deposited at different substrate temperatures and pressures. The films were prepared by radio frequency (RF) magnetron sputtering on glass substrates in argon (Ar) ambient. The X-ray diffraction analysis showed that the AZO films deposited at room temperature (RT) and 20 Pa were mostly oriented along a-axis with preferred orientation along (100) direction. There was an improvement in resistivity ($3.7{\times}10^{-3}{\Omega}-cm$) transmittance (95%) at constant substrate temperature (RT) and working pressure (20 Pa) using the Hall-effect measurement system and UV-vis spectroscopy, respectively. Our results have promising applications in low-cost transparent electronics, such as the thin-film solar cells and thin-film transistors due to favourable deposition conditions. Furthermore our film deposition method offers a procedure for preparing highly oriented (100) AZO films.