• Journal of Nutrition and Health
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• 제16권4호
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• pp.273-280
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• 1983

The effect of alteration of light-darkness cycle on the protein metabolism was studied in the rat. The light-darkness cycle was altered either every 3 or 9 days, and animals consumed diets containing 8 or 25% casein. The results were summarized as follows : 1) Food consumptions and body weight gains of the 25% casein groups were higher than those of the 8% casein groups, and, among the animals consumed 25% casein diet, the light-darkness cycle altered group had lower food consumption and body weight gain than the unaltered group. 2) Weights of liver and adrenal gland per l00g body weight were not different with the dietary protein levels, but, at the end of experimental period, the 8% casein diet group of which light-darkness cycle altered every 9 days had the smallest liver weight and the largest adrenal gland weight. 3) Liver nitrogen and plasma protein concentrations of the 25% casein groups were slightly higher than those of the 8% casein groups. 4) Percentages of nitrogen retention of the 25% casein groups at period III were slightly lower in the light-darknerr cycle altered animals than that of the unaltered group.

• Fisheries and Aquatic Sciences
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• 제22권1호
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• pp.4.1-4.10
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• 2019

Russian sturgeon (Acipenser gueldenstaedtii) is commercially important in Korea because its caviar is highly prized. Although the early ontogeny of the species has been described, behavioral modifications in response to various light intensities or diel photoperiodicity patterns have not been studied extensively. The objective of the present study was to examine the behavioral characteristics of hatchery-produced A. gueldenstaedtii prelarvae over a diel photoperiodic cycle. During a diel light cycle comprising 16 h of daylight (450 lx), 4 h of dim light (10 lx), and 4 h of darkness (< 1 lx), newly hatched A. gueldenstaedtii prelarvae exhibited negative phototaxis in daylight (day 0-day 2), and this early behavior was not significantly affected by changes of light intensities. Rheotactic and non-rheotactic aggregation into schools was typical between days 3 and 6. Under the diel light cycle conditions described, rheotaxis was not influenced by environmental light intensity as much as non-rheotactic schooling behavior. Post-schooling behavior, which progressed from day 7 to day 8, did not change significantly during the diel light cycle. The data from the present study could be of practical value in developing a visual guide for assessing the fitness and quality of Russian sturgeon prelarvae under diel light cycle conditions in hatcheries.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
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• pp.596-700
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• 1998

Nowadays, with increasing many vehicles on restricted roads, the conventional traffic light creates prove startup-delaytime and end-lag-time. The conventional traffic light loses the function of optimal cycle. And so, 30∼45% of conventional traffic cycle is not matched to the present traffic cycle. In this paper proposes electrosensitive traffic light using fuzzy look up table method which will reduce the average vehicle waiting time and improve average vehicle speed. Computer simulation results prove that reducing the average vehicle waiting time which proposed considering passing vehicle length for optimal traffic cycle is better than fixed signal method which doesn't consider vehicle length.

• 디지털융복합연구
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• 제12권7호
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• pp.247-252
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• 2014

교통의 연동시스템은 이웃한 교차로의 교통상황을 입력받아 해당 교차로 신호처리시 고려하는 시스템이다. 이웃 교차로의 통과차량수, 대기차량수,녹색신호등 주기 등을 감안하여 해당 교차로의 녹색신호등의 주기를 결정하는 형태이다. 해당교차로의 녹색신호등을 고려할 때는 자기 자신의 센서 입력들만 고려해서는 안되고 이웃 교차로의 센서 입력들을 받아 들여야 한다. 이러한 센서 노드들의 데이터 수집을 위해서 위험과 한계가 있는 곳에 센서 노드를 배치하여 데이터 수집을 하는 경향을 감안하여 사람이 인접할수 없는 곳이나 환경이 척박한곳에 센서들을 배치하여 센서들을 통한 정보 획득, 무선 네트워크를 통한 통신, 초저전력 소모를 실현할 수 있다.

• Journal of Microbiology and Biotechnology
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• 제29권9호
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• pp.1453-1459
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• 2019

Zeaxanthin is an important pigment in the photo-protection mechanism of microalgae. However, zeaxanthin epoxidase, an enzyme involved in the accumulation and conversion of zeaxanthin, has not been extensively studied in microalgae. In this work, we report the expression pattern of zeaxanthin epoxidase in Dunaliella tertiolecta (DtZEP) at different light and diverse salinity conditions. To confirm the responsiveness to light conditions, the ZEP expression pattern was investigated in photoperiodic (16 h of light and 8 h of dark) and continuous (24 h of light and 0 h of dark) light conditions. mRNA expression levels in photoperiodic conditions fluctuated along with the light/dark cycle, whereas those in continuous light remained unchanged. In varying salinity conditions, the highest mRNA and protein levels were detected in cells cultured in 1.5 M NaCl, and ZEP expression levels in cells shifted from 0.6 M NaCl to 1.5 M NaCl increased gradually. These results show that mRNA expression of DtZEP responds rapidly to the light/dark cycle or increased salinity, whereas changes in protein synthesis do not occur within a short period. Taken together, we show that DtZEP gene expression responds rapidly to light irradiation and hyperosmotic stress. In addition, ZEP expression patterns in light or salinity conditions are similar to those of higher plants, even though the habitat of D. tertiolecta is different.

• 센서학회지
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• 제25권5호
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• pp.303-309
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• 2016

In this paper, we introduce a new method for controlling the illumination of LEDs in visible light communication (VLC) by changing the duty cycle of Manchester code. When VLC data were transmitted in Manchester code, the average optical power of the LEDs was proportional to the duty cycle. In experiments, we controlled the illumination of a $3{\times}3$ LED array from 10% to 90% of its peak value by changing the duty cycle of the Manchester code. The synchronizing clocks required for encoding and decoding the Manchester code were supplied by pulse generators that were connected to a 220 V power line. All pulse generators made the same pulses with a repetition frequency of 120 Hz, and they were synchronized with the full-wave rectified voltage of the power line. This scheme is a very simple and useful method for constructing indoor wireless sensor networks using LED light.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제3권1호
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• pp.105-111
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• 2003

This paper is researching the storing of 40 different kinds of conditions. Such as, car speed, delay in starting time and the volume of cars in traffic. Through the use of a central nervous networking system or AI, using 10 different intersecting roads. We will improve the green traffic light. And allow more cars to easily flow through the intersections. Now days, with increasing many vehicles on restricted roads, the conventional traffic light creates prove startup-delay time and end-lag-time. The conventional traffic light loses the function of optimal cycle. And so, 30-45% of conventional traffic cycle is not matched to the present traffic cycle. In this paper proposes electro sensitive traffic light using fuzzy look up table method which will reduce the average vehicle waiting time and improve average vehicle speed. Computer simulation results prove that reducing the average vehicle waiting time which proposed considering passing vehicle length for optimal traffic cycle is better than fixed signal method which dosen't consider vehicle length.

• 수면정신생리
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• 제9권2호
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• pp.81-85
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• 2002

There are several factors which are more likely to have sleep disorders in fertile women with menstruation than adult men. Menstrual cycle plays an important role in them. We describe herein the overview about the association of menstrual cycle and sleep disorders by viewing the interactions of menstrual cycle and circadian rhythm. We review how menstrual cycle affects sleep-wake cycle by reviewing menstrual cycle and estrous cycle to understand these interactions. Menstrual cycle and estrous cycle are mainly affected by hormonal cycle and light-dark cycle, respectively and they are generally determined in monthly rhythm and annual rhythm, respectively. The determination of estrous cycle is also affected by cyclic changes of hormones besides light-dark cycle. Although sleep-wake cycle almost alternates according to estrous cycle in non-primate mammals, it is hardly affected by menstrual cycle in primate mammals as compared with estrous cycle. But menstrual cycle affects sleep-wake cycle via desynchronization of sleep-wake cycle and temperature rhythm. The decrease of amplitude and phasic change during luteal phase in the daily fluctuation of body core temperature can partially contribute to the induction of sleep disorders in fertile women. In addition to this, premenstrual syndrome which nearly happens during luteal phase commonly have sleep problems. Therefore, we suggest that menstrual cycle and PMS can partially contribute the increase of sleep disorders in fertile women.

• 한국수산과학회지
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• 제28권4호
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• pp.428-434
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• 1995

생선 횟집의 활어용 수조수에 대한 위생 대책 수립의 일환으로 자외선을 이용한 제균 효과를 검토하였다. 1. 물 두께 10mm (유수량: 730ml/sec, 등; 5조, 통과 시간: 2.4초)와 자외선 조사량 75W의 조건에서 자외선 등 통과 직후의 해수에서의 생균수 감소율은 평균 $85.0\%$였다. 2. 장염 비브리오균의 경우, 자외선 조사 후 1시간만에 3 log cycle 감소하였으며, 그 이후 큰 변화가 없었다. 3. 한편 쥐치에 같은 조건으로 72시간 처리했을 때 내장 세균의 감소는 거의 없었으나, 돌돔 및 쥐치의 표피와 아가미에서의 생균수 감소율은 약 2log cycle이었다. 4. 패류의 여수율을 좋게 하기 위하여 수조수의 온도를 $20-23^{\circ}C$로 조절한 수조에서 홍합과 굴을 같은 조건으로 처리했을 때 24시간 후에 생균수의 감소율은 홍합과 굴에서 각각 2 log cycle 정도였으며, 분변계 대장균의 경우는 각각 3 log cycle, 1.5 log cycle 정도 감소하였다.

• 전자공학회논문지CI
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• 제40권4호
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• pp.181-192
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• 2003

제한된 도로에 급증하는 자동차로 인해서, 기존의 교통신호등은 최적주기기능을 상실하였다 기존의 교통신호등은 승용차 환산계수, 옵셋, 교차로 길이 등을 고려하지 않았으므로 기존 신호등의 30∼45%가 교통현시와 일치하지 않는다. 본 논문에서는 기존 교통신호등의 단점을 알아보고, 퍼지 규칙을 이용하여 교차로에서의 평균주행속도와 평균대기시간을 개선한다. 뿐만 아니라, 인터넷을 이용해서 위험한 도로, 공사 중인 도로 및 최적의 교통상황을 예보하는 기능을 제공할 수 있도록 하였다.