• 한국토양동물학회지
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• 제5권2호
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• pp.119-123
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• 2000

변온조건이 파밤나방 (Spodoptera exigua (H bner)) 유충과 영의 발육에 미치는 영향이 분석되어졌다. 정온조건에서 사육하였을 때 발육영점온도는 발육태와 유충영기에 따라 다르지만 평균 13$^{\circ}C$로 추정되었다. 이 발육영점온도를 기준으로 동등한 일일유효온도를 갖는 세 가지 다른 발육 온도조건을 설정하였다. 정온조건에 비해 변온조건은 발육속도를 뚜렸하게 변화시켰다. 동일한 최고온도(2$0^{\circ}C$)를 가졌던 두 가지 일일 변온조건중에서 저온기간이 상대적으로 높았던 조건(1$0^{\circ}C$)은 발육속도를 촉진시킨 반면 저온기간의 온도가 낮았던 조건(5$^{\circ}C$C)은 오히려 저해효과를 나타냈다.

• International Journal of Industrial Entomology and Biomaterials
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• 제31권2호
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• pp.35-39
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• 2015

The developmental responses of insects to temperature are important considerations in gaining a better understanding of their ecology and life histories. Temperature-dependent phenology models permit examination of the effects of temperature on the geographical distributions, population dynamics, and management of insects. Measurements of insect developmental and survival responses to temperature pose practical challenges that depend on the chosen modality, variability among individuals, and high mortality rates near the lower and upper threshold temperatures. Different temperature levels can significantly affect larval development of Eurema hecabe. The development of E. hecabe reared on leaves of Lespedeza cuneata was investigated at three temperature regimes (20, 25, and 30℃), a relative humidity of 60%, and a light:dark photoperiod of 14:10 h. The developmental time from larva to adult was 34.3, 20.6, and 17.9 d at temperatures of 20, 25, and 30℃, respectively. Pupal rate was 47.6%, 47.6%, and 61.9% at temperatures of 20, 25, and 30℃, respectively. The developmental threshold temperature estimated from larva to pupae was 8.1℃ with 381.7 degree-days. There is an increasing need for a standardized manual for rearing this butterfly species based on adequate knowledge of its ecology.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.2
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• pp.864-867
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• 2003

Since the development of semiconductors, various related research has been conducted. During research, silicon diodes have been commonly used because of their simplicity and low cost in the manufacturing process. This research deals with p-n junction threshold voltages from silicon diodes due to transport current at a cryogenic temperature. At a cryogenic temperature(77K) we could get minimum current which junction threshold voltage becomes constant. This is experimented on GPIB communication and it consist of programmable current source, multimeter which gauge the threshold voltage in a very low temperature caused by transport current from 5nA to 1mA and $LN_2$(77K) for coolant. This experiment is programmed all process using Measurement studio(Lab window) tool.

• 대한원격탐사학회지
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• 제15권3호
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• pp.239-251
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• 1999

The elimination process of cloud-contaminated pixels is one of important steps before obtaining the accurate parameters of land and ocean surface from AVHRR imagery. We developed a 6step threshold method to detect the cloud-contaminated pixels from NOAA-14/AVHRR datime imagery over land using different combination of channels. This algorithm has two phases : the first is to make a cloud-free characteristic data of land surface using compositing techniques from channel 1 and 5 imagery and a dynamic threshold of brightness temperature, and the second is to identify the each pixel as a cloud-free or cloudy one through 4-step threshold tests. The merits of this method are its simplicity in input data and automation in determining threshold values. The threshold of infrared data is calculated through the combination of brightness temperature of land surface obtained from AVHRR imagery, spatial variance of them and temporal variance of observed land surface temperature. The method detected the could-comtaminated pixels successfully embedded inthe NOAA-14/AVHRR daytime imagery for the August 1 to November 30, 1996 and March 1 to July 30, 1997. This method was evaluated through the comparison with ground-based cloud observations and with the enhanced visible and infrared imagery.

• 한국유기농업학회지
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• 제28권2호
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• pp.251-261
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• 2020

친환경 벼 재배지역 위주로 피해가 점차 확대되는 먹노린재(Scotinophara lurida) 방제기술 개발을 위하여 발생생태 및 온도의존 발육모형을 산출하였다. 2019년도 먹노린재 월동 후 생존율 조사결과 총 224마리 중 167마리가 생존하여 생존율은 72.8%였다. 먹노린재 월동성충은 논에 6월 중하순부터 발생하고, 7월 상순에 산란하고, 8월 중하순에 1세대 성충이 발생한다. 온도의존 발육모형을 구하기 위하여 18, 21, 24, 27, 30℃ 14L:10D 조건의 항온기에서 온도별, 발육단계별 발육기간을 조사하였다. 18, 21, 24, 27, 30℃의 온도조건에서 알에서 성충이 될 때까지의 기간은 각각 119.8, 73.1, 53.5, 39.4, 82.0일로 27℃에서 가장 발육이 잘 되었다. Excell 프로그램을 이용하여 온도와 발육속도와의 관계를 2차 다항식으로 분석하여 회귀곡선을 얻었고 이를 근거로 발육단계별 발육영점온도와 유효적산온도를 산출하였다. 알에서 5령 약충까지 먹노린재 발육영점온도는 17.9℃, 유효적산온도는 380.2DD였다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(2)
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• pp.5-8
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• 2001

This paper describes the development of SiC MOSFET model for high temperature applications. The temperature dependence of the threshold voltage and mobility of SiC MOSFET is quite different from that of silicon MOSFET. We developed the empirical temperature model of threshold voltage and mobility of SiC MOSFET and implemented into HSPICE. Using this model the MOSFET Id-Vds characteristics as a function of temperature are simillated. Also the SiC CMOS operational amplifieris designed using this model and the temperature dependence of the frequency response, transfer characteristics and slew rate as a function of temperature are analyzed.

• 한국환경보건학회지
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• 제38권6호
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• pp.460-471
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• 2012

Objectives: Due to global warming resulting from climate change, there has been increasing interest in the relationship between temperature and mortality. These temperature-related deaths depend on diverse conditions related to a given place and person, as well as on time. This study examined changes in the impact of high temperatures on death in summer, using the effect and burden of elevated temperatures on deaths in Seoul and Daegu. Methods: A Poisson regression model was used to estimate short-term temperature effects on mortality. Temperature-related risks were divided into three time periods of equal length (1996-2000, 2001-2005, and 2006-2010). In addition, in order to compare the impact of high temperatures on deaths, this study calculated the proportion of attributable deaths to population, which simultaneously considers the threshold and the slope above the threshold. Results: The effect and burden of high temperatures on deaths is high in Daegu. However, the impact (i.e. the effect and burden) of elevated summer temperatures on deaths has declined over the past 15 years. Sensitivity analyses using alternative thresholds show the robustness of these findings. Conclusion: This study suggests that the attributable burden of high temperatures on deaths to be more plausible than relative risk or threshold for comparing the health impact of high temperatures across populations. Moreover, these results contain important implications for the development or the adjustment of present and future strategies and policies for controlling the temperature-related health burden on populations.

• 생명과학회지
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• 제10권1호
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• pp.1-6
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• 2000

Larval development, adult longevity and oviposition of the beet armyworm, Spodoptera exigua H bner was studied at 16, 20, 25 and 3$0^{\circ}C$ with a 16L: 8D photoperiod. Egg hatchability of S. exigua was the highest at 3$0^{\circ}C$ and reduced with decreasing temperature. Egg period was the shortest at 3$0^{\circ}C$ and prolonged with decreasing temperature. Percent pupation was became higher at higher temperature form 23.2% to 94.0%. Developmental period of larva was the shortest at 3$0^{\circ}C$, but extended with decreasing temperature. Adult emergence ratio was the highest at 3$0^{\circ}C$ and reduced with decreasing temperature. The mean pupal period was 35.2, 14.4, 7.8 and 5.0 days at 16, 20, 25 and 3$0^{\circ}C$, respectively. Relationships between constant temperature and the developmental velocity of egg, larva and pupa were linear. Developmental threshold temperature seems to be 13.3 8$^{\circ}C$ for egg, 14.02$^{\circ}C$ for larva, 14.09$^{\circ}C$ for pupa, and 13.84$^{\circ}C$ for egg the adult. Estimated value of the total effective temperature for completing each stage was 36.89 day-degree for egg, 155.72 day-degree for larva, 79.20 day-degree for pupa, and 273.41 day-degree for egg to adult. Female longevity varied to temperature from 11.4 days at 16$^{\circ}C$ to 5.8 days at 3$0^{\circ}C$, and male longevity was longer than that of female. Preoviposition period was the shortest at 3$0^{\circ}C$, but prolonged with decreasing temperature. It was about 2.7 times longer at 16$^{\circ}C$ than that at 3$0^{\circ}C$. Number of eggs per female was the highest at $25^{\circ}C$, followed by 20, 30 and 16$^{\circ}C$.

• 환경생물
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• 제27권3호
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• pp.292-296
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• 2009

본 연구는 한국의 멸종위기곤충인 꼬마잠자리 알의 발육과 온도의 관계를 추정하고자 8가지 서로 다른 온도 조건(17, 20, 22, 25, 28, 30, 33 및 $36^{\circ}C$)에서 실시하였다. 꼬마잠자리의 알은 2007년 6월 경상북도 문경시 일대의 산간 습지에 서식하는 암컷 성충으로부터 채취하였다. 실험의 결과, 부화율은 17, 20, 22, 25, 28, 30, 33, 그리고 $36^{\circ}C$에서 각각 2.86, 17.09, 24.32, 39.67, 34.43, 40.57, 44.79 및 1.75%였다. 각 온도에서의 알의 발달율(평균발육속도)은 변형된 Sharpe와 DeMichele의 비선형 모형에 부합하였다. 알의 저온발육임계온도는 $14.02^{\circ}C$(y=0.005988x-0.084, $r^2$=0.99)로 추정되었고, 발육최적온도는 $30{\sim}35^{\circ}C$로 추정되었다.

• 한국응용곤충학회지
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• 제61권4호
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• pp.577-590
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• 2022

콩줄기명나방은 콩과작물 특히 팥을 가해하는 해충으로 알려져 있다. 본 연구는 온도가 콩줄기명나방의 발육단계별 발육기간, 성충의 수명과 산란특성에 미치는 영향을 파악하고자 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, 36℃ 항온조건에서 조사하였다. 알과 유충은 7, 10, 13℃를 제외한 항온조건에서 다음 생애단계로 성공적으로 발육하였다. 알, 유충, 번데기의 발육기간은 온도가 상승할수록 짧아지는 경향을 보였다. 콩줄기명나방 발육단계별 발육 최저, 최고 한계는 LRF와 SSI모델을 이용하여 계산하였고 발육영점온도와 유효적산온일도는 선형회귀분석을 이용하였다. 1령 유충 부화부터 성충출현까지의 발육영점온도와 유효적산온일도는 13.5℃와 384.5DD로 추정되었다. SSI모델을 이용한 부화부터 성충출현까지 발육 최저 및 최고온도는 19.4℃과 39.8℃였고 이들간의 차이 즉 발육적정온도범위는 20.4℃였다. 성충은 16℃와 34℃ 범위에서 부화하는 알을 생산하였고, 25℃에서 최대 약 416마리의 자손을 낳았다. 노화율, 나이별 생존율, 나이별 누적산란율, 온도의존 산란수에 관련된 성충모델들이 작성되었다. 본 연구에서 제시한 온도발육모형과 산란모형은 야외에서 콩줄기명나방의 개체군동태를 이해하고 콩과작물의 종합적인 해충군관리체계를 마련하는데 기초기반자료로 활용될 것으로 기대된다.