• 한국지역사회생활과학회지
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• 제17권2호
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• pp.49-60
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• 2006

It was measured the energy expenditure in each season, the cold tolerance in winter and the heat tolerance in summer. Farmers' adaptability to the change of environment was compared with those of city-dwellers such as indoor workers and street cleaners to determine the effect of living environment, especially living temperature, on the health of human body. It turned out that farmers had experienced wide range of temperature that was higher in summer and lower in winter than indoor workers. Farmers and street cleaners showed seasonal adaptation in energy expenditure, which was high in winter and low in summer. However, indoor workers did not show seasonal changes. Energy expenditure had an inverse correlation with the temperature in work place where subjects spend the longer time in a day except in female indoor workers in Seoul. And It was proved that farmers and street cleaners had stronger cold tolerance and heat tolerance than indoor workers.

• 한국반도체및디스플레이장비학회:학술대회논문집
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• 한국반도체및디스플레이장비학회 2002년도 추계학술대회 발표 논문집
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• pp.59-63
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• 2002

This paper reports on the fabrication process and characteristics of a ceramic thin-film pressure sensor based on Ta-N strain-gauges for harsh environment applications. The Ta-N thin-film strain-gauges are sputter-deposited on a thermally oxidized micromachined Si diaphragms with buried cavities for overpressure tolerance. The proposed device takes advantage of the good mechanical properties of single-crystalline Si as a diaphragm fabricated by SDB and electrochemical etch-stop technology, and in order to extend the temperature range, it has relatively higher resistance, stability and gauge factor of Ta-N thin-films more than other gauges. The fabricated pressure sensor presents a low temperature coefficient of resistance, high-sensitivity, low non-linearity and excellent temperature stability. The sensitivity is 1.21 ~ 1.097 mV/V.kgf/$\textrm{cm}^2$ in temperature ranges of 25~ $200^{\circ}C$ and a maximum non-linearity is 0.43 %FS.

• 한국수산과학회지
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• 제44권3호
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• pp.276-283
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• 2011

The growth and tolerance for water temperature and salinity were compared among red sea bream Pagrus major (RSB) black sea bream Acanthopagrus schregeli (BSB) and their hybrid ($F_1$), female RSB ${\times}$ male BSB. The growth of the $F_1$ fish did not differ until 27 days after hatching (dAH), after which the most rapid growth was observed until approximately 300 dAH, followed by RSB and BSB. However, the RSB had out grown the $F_1$ fish by approximately 303 dAH. By 480 dAH, the RSB were largest, followed by the $F_1$ and BSB groups. The tolerances for high and low water temperature were significantly different for each species and growth stage. The largest tolerance spectrum was observed in the BSB group, and the tolerance spectrums gradually decreased with increasing final body weight. During the salinity tolerance trials, all of the species started to die following transfer into freshwater (0 psu). BSB showed the highest survival rate when kept in fresh water for an average of 29.9 hours, while the $F_1$ fish were more tolerant than the RSB fish. The fish were increasingly tolerant to fresh water and changes in water temperature as they grew, while the size of the temperature spectrum remained unchanged but shifted to a lower temperature range with growth. Our results demonstrate that $F_1$ performed well in terms of growth compared to parental fish, with higher temperature and salinity tolerances than RSB, and is thus suggested to be a suitable aquaculture species for Korea and northeast China.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집 Vol.3 No.2
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• pp.731-734
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• 2002

This paper describes on the fabrication and characteristics of a ceramic thin-film pressure sensor based on Ta-N strain gauges for harsh environment applications. The Ta-N thin-film strain gauges are sputter deposited onto a micromachined Si diaphragms with buried cavity for overpressure protectors. The proposed device takes advantages of the good mechanical properties of single crystalline Si as diaphragms fabricated by SDB and electrochemical etch-stop technology, and in order to extend the operating temperature range, it incorporates relatively the high resistance, stability and gauge factor of Ta-N thin-films. The fabricated pressure sensor presents a low temperature coefficient of resistance, high sensitivity, low non-linearity and excellent temperature stability. The sensitivity is $1.097{\sim}1.21mV/V{\cdot}kgf/cm^2$ in the temperature range of $25{\sim}200^{\circ}C$ and the maximum non-linearity is 0.43 %FS.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 춘계합동학술대회 논문집
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• pp.192-196
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• 2002

This paper describes on the fabrication and characteristics of a metal thin-film pressure sensor based on Cr strain-gauges for harsh environment applications. The Cr thin-film strain-gauges are sputter-deposited onto a micromachined Si diaphragms with buried cavity for overpressure protectors. The proposed device takes advantages of the good mechanical properties of single-crystalline Si as diaphragms fabricated by SDB and electrochemical etch-stop technology, and in order to extend the operating temperature range, it incorporates relatively the high resistance, stability and gauge factor of Cr thin-films. The fabricated pressure sensor presents a low temperature coefficient of resistance, high-sensitivity, low non-linearity and excellent temperature stability. The sensitivity is 1.097~1.21 $mV/V{\cdot}kgf/cm^2$ in the temperature range of $25{\sim}200^{\circ}C$ and the maximum non-linearity is 0.43 %FS.

• ALGAE
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• 제25권2호
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• pp.99-104
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• 2010

A psychrotolerant cyanobacterium, Nodularia spumigena KNUA005, was isolated from a cyanobacterial bloom sample collected near Dasan Station in Ny-${\AA}lesund$, Svalbard Islands during the Arctic summer season. To generate an axenic culture, the isolate was subjected to three purification steps: centrifugation, antibiotic treatment and streaking. The broad antibacterial spectrum of imipenem killed a wide range of heterotrophic bacteria, while the cyanobacterium was capable of enduring both antibiotics, the remaining contaminants that survived after treatment with imipenem were eliminated by the application of an aminoglycoside antibiotic, kanamycin. Physical separation by centrifugation and streaking techniques also aided axenic culture production. According to the cold-tolerance test, this mat-forming cyanobacterium was able to proliferate at low temperatures ranging between 15 and $20^{\circ}C$ which indicates the presence of cold-tolerance related genes in N. spumigena KNUA005. This suggests the possibility of incorporating cold-resistance genes into indigenous cyanobacterial strains for the consistent production of algae-based biofuel during the low-temperature seasons. Therefore, it is needed to determine the cold-tolerance mechanisms in the Arctic cyanobacterium in the next research stage.

• 한국산학기술학회논문지
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• 제22권1호
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• pp.575-584
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• 2021

본 연구는 연속행동모니터링시스템(CBMS)을 사용하여 저온 충격에 노출된 참돔 Pagrus major 치어의 행동반응에 대한 임계 수온 및 행동 내성 반응을 규명하였다. 실험생물의 행동은 8.0~20.0℃ 수온구간에서 12시간과 24시간 마다 각각 2.0℃와 4.0℃씩 하강시키며 관찰하였다. 참돔 치어는 12.0℃ 이하로 수온이 하강한 경우 수온 노출시간과 변동 폭에 관계없이 유영활동이 감소하고 정지가 반복되는 불안정한 행동패턴이 관찰되었다. 또한 8.0~10.0℃ 수온에 노출된 생물의 유영능력은 급격히 저하되어 수조 바닥에서 머무르는 아치사 반응 행동을 보였다. 실험어류는 저 수온 스트레스 영향을 받아 생물의 50 %만 생존하였으며, 저온 충격(cold shock) 후 6시간 이내에 모든 개체가 사망하였다. 또한 행동지수(BI)는 급격히 감소하였으며 변이계수(CV)의 진폭변화는 타 수온보다 변동 폭이 큰 것으로 분석되었다(p<0.05). 참돔 치어의 저온 스트레스는 12.0℃를 경계로 촉진되며, 8.0~10.0℃의 저온 충격에 노출된 생물의 아치사 반응을 유발시키는 내성한계인 것으로 해석된다.

• 한국조경학회지
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• 제40권4호
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• pp.127-134
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• 2012

이 연구는 저관리 경량형 옥상녹화시스템을 위한 내한성 식물 선발을 목적으로 6종 식물을 대상으로 저온 처리시간과 온도에 따라 전해질 용출 평가와 재생 검사를 연구하였다. Logistic 비선형 회귀분석을 이용하여 전해질 용출 평가를 통하여 치사 온도는 $-16.1{\sim}-24.4^{\circ}C$ 범위로 예측되었으며, 저온에 대한 저항성은 Sedum reflexum > S. spurium > Ophiopogon japonicus > S. album > S. takevimense > Dianthus chinensis의 순으로 나타났다. 2012년 2월 최저 온도인 $-13.4^{\circ}C$에 모든 식물의 전해질 용출은 50% 이하로 나타났으며, 겨울철 최적기온 $-13.5^{\circ}C$ 이상의 지역에서 식물들을 옥상에서 안정적으로 생육될 수 있을 것으로 예측되었다.

• 한국어병학회지
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• 제16권2호
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• pp.119-123
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• 2003

We have selected an valuable pmbiotic strain; Lactobacillus sakei BK19 which has wide antagonic spectrum against fish pathogens . Present study investigated cultural characterization of L. sakei BK19 including pH tolerance , susceptibility of antibacterial agents and growth pattern with different environment such as nutritions, temperature and salinity. L. sakei BK19 showed Significantly higher resistance at low pH(around pH 4) environment and relative high antibiotic tolerance . In the study of optimal culture condition, maltose and saccharose provided the optimal nutritional culture condition while lactose and mannitol were unable to supply its carbon source for the fermentation of L. sakei BK19. Moreover. L. sakei BK19 showed good growth at the temperature range of 15 to $45^{o}C$ und the NaCl concentration of 0 to 7%. Hence, this particular probiotic strain may be benificial both in seawater and fresh weter conditions.

• 한국연초학회지
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• 제1권1호
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• pp.39-45
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• 1979

극단의 土壤水分( 4 %, 24% )과 溫度(33$^{\circ}C$, -2$^{\circ}C$)에서 뿌리혹線筮의 生存率을 조사한 결과 土壤水分 함량에 따른 차이는 인정되지 않았고, 溫度 處理의 경우 33$^{\circ}C$에서는 Meloidogyne incognita, -2$^{\circ}C$에서는 M. hapla의 생존율이 높았으며, M. arenaria는 兩 處理에서 양자의 중간 정도의 반응을 보였다. 低溫처리에서 tolerance의 증가는 모든 線筮에서 인정되었으며 특히 M. hapla의 tolerance가 가장 높았다.