• Journal of Animal Science and Technology
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• 제66권3호
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• pp.504-513
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• 2024

Duck meat is recognized as a healthier poultry product that contains higher amounts of unsaturated and essential fatty acids, iron, and excellent amounts of protein. It has been found to possess the ability to reduce low-density lipoprotein cholesterol and subsequently, blood pressure in the human body; and improve the immunity system. The current study investigated the appropriate bedding depths of rice hulls as a preferred bedding material by evaluating the growth performance and carcass traits of White Pekin ducks raised for 42 days. A total of 288 one-day-old White Pekin ducklings were randomly allotted to floor cages with one of four bedding depths at 4 cm, 8 cm, 12 cm, and 16 cm. Ducklings were fed standard duck starter (days 1-21) and finisher (days 22-42) diets. The birds were stocked at a rate of 6 birds/m² with 6 replicates per treatment. Growth performance evaluation for the body weight, average daily gain, and average daily feed intake were measured to calculate the weekly feed conversion ratio. Breast, leg, and carcass yield were assessed as carcass traits. The muscle color and proximate composition were also analyzed for meat quality. Footpad dermatitis was also evaluated on day 42. Ducks reared on 16 cm bedding depth over the 42 days recorded higher (p < 0.05) body weight, average daily, average daily feed intake, and improved feed conversion ratios compared to other groups. The crude fat in breast meat also lowered (p < 0.05) in ducks reared at 16 cm (1.02%) when compared to ducks raised at 4 cm bedding depth (2.11%). Our results showed improved redness (p < 0.05) when the depth of bedding materials was elevated. Except for the breast meat fat, the dissimilar bedding depths did not affect (p < 0.05) the breast and leg meat composition, footpad dermatitis, and mortality for the current study. In conclusion, this study indicated that the bedding depths would directly or indirectly affect the growth performance and meat color of White Pekin ducks; and the bedding depth of rice hulls at 16 cm improved the growth performance of White Pekin ducks for 42 days.

• 한국인터넷방송통신학회논문지
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• 제18권4호
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• pp.169-175
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• 2018

프로세서의 전력 소비량은 최근에 이르러 고성능 마이크로프로세서 및 멀티코어프로세서 뿐만이 아니라 임베디드 시스템 및 모바일 장치에 매우 중요하게 대두되고 있다. 이러한 전력 소비량은, 하드웨어 및 소프트웨어 설계자로 하여금 성능과 전력에 대한 올바른 타협점을 찾도록 하는 바탕이 된다. 대부분의 전력 분석 도구들은 반도체 칩 레이아웃이나 평면계획이 완료된 후에야 최소의 정확도를 갖게 되며 또한 느리다. 본 논문에서는 전력 분석기와 연동이 가능한 빠른 속도를 갖는 임베디드 마이크로프로세서 명령어 자취형 (trace-driven) 모의실험기를 개발하였다. 또한, MiBench 임베디드 벤치마크를 입력으로 모의실험을 수행하여 기존의 도구보다 훨씬 빠른 속도로 명령어 당 평균 전력 소비량을 측정하였다.

• 한국산학기술학회논문지
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• 제18권11호
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• pp.282-289
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• 2017

경제동물에 대한 동물복지에 대한 관심은 전세계적으로 고조되고 있는 추세이다. 그러나, 국내 양돈농가는 경제성 등을 이유로 고려하지 않거나 미비한 도입으로 돼지 본연의 행동이 제한되고 있다. 따라서, 본 연구의목적은 일반적인 사육환경에 환경보조물의 제공이 육성돈의 행동특성에 미치는 영향을 구명하고자 실시하였다. 실험동물은 45두의 3원 교잡육성돈(요크셔${\times}$랜드레이스${\times}$두록; 평균체중, $33.35{\pm}5.5kg$)을 준비하였고, 완전임의배치법(randomized complete block design)에 의해 3개 처리구(대조구; 현수형 환경보조물, T1; 바닥형 환경보조물, T2)에 처리구당 3반복, 반복당 5두씩 반슬러리 돈방에 배치하였다. 현수형 환경보조물은 돼지의 어깨 높이에 현수하였고, 바닥형은 돈방의 가운데에 고정시켰다. 시험기간은 14일간 수행하였으며 시험종료일에 스트레스호르몬인 코티졸(cortisol) 농도를 분석하였고 행동특성은 1과 8일차에 촬영하였고 베가스 프로(Vegas Pro) 13.0 프로그램을 활용하여 및 분석하였다. 체중 및 일당증체량은 대조구와 처리구들간 차이가 없었다. 코티졸호르몬은 T2(25.28 ng/mL)에서 대조구(46.75 ng/mL)보다 유의적으로 낮았다(p<0.05). 1일차 행동 유형별 지속시간은 움직임과 공격 항목에서 대조구에 비해 처리구에서 유의적으로 낮았다(p<0.01). 8일차 놀이행동 지속시간에서 처리구2는 925.12초로 T1의 323.91초 보다 유의적으로 높았다(p<0.01). 반면에 처리구들에 비해 대조구는 움직이지 않는 시간이 많았다(p<0.01). 이러한 결과는 환경보조물 제공이 돼지간 공격성을 감소시키고 돼지의 행동을 활동적으로 만들어 돼지 본연의 행동요구를 충족시킬 수 있음을 시사한다. 그러나, 국내에서 환경보조물에 대한 연구는 미흡하므로 본 연구결과는 보조물을 이용한 동물복지에 대한 기초자료로서 활용 가능할 것으로 사료된다.

• 한국환경보건학회지
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• 제17권2호
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• pp.54-66
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• 1991

As a result of measuring illumination and making up a question at home visit directly by investigator who trained over twenty days period from October 4 to 24, 1990, in order to render help which illumination problem against house, society against eyes or framing of health instruction potgram by seizing natural lighting actual conditions of house and actual conditions of wearing spectacles and by investigating interrelationship, I can summarize as follows. 1) In property of investigation subject, woman 66.9%, In an age, the twenties was largest of 27.4%, the forties was 20.2%, the fifties was 18.6%, the thirties was 17.4%. In academic career, those of upper secondary school grauates was largest of 28.6%, those who possess university career was 25.9%, those who middle school career was 20.9%, decoding of Korean alphabet was 2%. 2) By a residence area, a big city was 43.3%, farming and fishing villages were 20.3%, the rest was a small town and the administrative office of town, township. In positon of house, the middle area was 43.6%, resident of suburb area was 38.0%. In form of house, a Korean-style house was 40.8%, a western-style house was 34.8%, an apartment house was 11.0%. In the a standard of living, the middle classes 77.2%, the lower classes were 15.3%. In residential house unit of area, from 21 to 30 unit of area was largest of 31.5%, from 10 to 20 unit of area was 19.9%, from 31 to 40 was 18.7%. 3) The wearing spectacles rate of study user was 44.1%. By the area, those who wearing spectacles was more than a half of 50.8% in the resident of big city area. As passing from the farm area to the city, that is being resident of big city was high wearing spectacles rate. In position of house, as being residence in central street showed high wearing spectacles rate. (central street was 51.5%, the middle area was 44.5% and the suburb area was 40.1%.) It seemed similarity difference a variable by position of house from wearing spectacles in standard of 1%. By form of house, wearing spectacles rate those who resident in apartment house was 49.5%, that rate those who resident in a western-style house was high of 49.0%, that rate those who resident in a Korean-style house was the lowest 39.0%. By social position of resident in room, in students case who study showed very high, as university students were very high of 62.3% idn wearing spectacles rate, middle and high school students 'were 50.0%, members of society were 47.6%, workers 20.3%. It seemed similarity difference from academic career in standard of 1%. By an age, the thirties was high of 54.1% in wearing spectacles rate, the twenties was 43.2%, the teenage was the lowest of 11.8%. 4) In illumination of study, over 200Lux was high of 40.1%. but below 99Lux which inappropriate illumination to see the books was 32.4%. Average by area, below 99Lux was 22.7% and over 400Lux was 50.0% in case of wooden floor. As examine by area, below 99Lux was high of 27.0% a case of wooden floor in the big city area, it was not good in illumination passing from the farm area(15.0%) to the city(19.0%). Average illlumination by area of the main living room below 99Lux was high of 37.5%, less than 200Lux was 58.5% of whole. In general, illumination of the main livingroom was inappropriate. By area, the big city was 32.5% below 99Lux, the middle and small city area were 33.8%, town and township area were 45.0%, farming and fishing area were 42.8%. By area, in the big city, illumination of study was 52.5% over 200Lux and 28.9% below 99Lux. In case of the middle and small city, study user of below 99Lux was 38.8% and over 200Lux was 46.9%. In case of the seat of town township, below 99Lux was 34.1% and over 200Lux was 39.7%. In case of farming and fishing area, illumination of study was 33.4% below 99Lux and 48.4% over 200Lux. It tends to high rate of inappropriate illumination. 5) By position of house, in case of wooden floor, less than 100Lux was 24.5% in central street. It was bad illumination than others position of house. In case of the main livingroom, less than 100Lux was 40.4% in the suburb area. It was bad iliumnation than others position of house. In case of study, less than 100Lux was 35.4% in the middle area, it was worse in illumination. In case of the main living room, is seemed similarity difference in standard of 1%. 6) By form of house, in case of wooden floor, illumination of less than 100Lux was 23.8% in a western-style house, it was bad illumination than others form of house. In case of the main livingroom, illumination of less than 100Lux was 47.4% in a Korean-style house, it was remarkably bad illumination than others form of house. In case of study, a Korean-style house was 38.8%, it was very bad illumination than others form of house. In case of the main livingroom and study, it seemed similatrity difference each as P < 0.01 and P < 0.05 in standard of 1%. 7) The wearing spectacles rate of those who use room of illumination over 400Lux was 40.7%, and that of those who use room of illumination less than 100Lux was 28.1%. It seemed similarity differecce in standard of 1%. 8) In period of wearing spectacles, 21.3% of total investigator-highest-was from before five years, 8.6% was from before three years. Among those who use of illumintion less than 99Lux, 34.0% began to wear spectacles from before two years 31.7% was from before five years, 30.3% was from before four years. It seemed similarity difference from period of wearing spectacles by illumination in standard of 1 %. 9) Among cause which sight grow worse, the first was that it was each 33.2% and 27.4% in response rate because watch TV nearly to wearing spectacles person and non-wearing person. The second was that a lot of seeing books was 25.3% in wearing spectacles person and response rate for dark illumination was 7.4% in nonwearing spectacles person. It seemed similarity difference in standard of 1%. (P < 0.01). 10) In experience which take medicine good for eyes, it was 50.1% in wearing spectacles person and 8.5% in non-wearing spectacles person. It seemed similarity difference in standard of 1%(P < 0.01). As we have seen above, inappropriate illumination can be a cause of wearing spectacles. Nevertheless, actually, is realities to indifferent against illumination of house. So it must learn knowledge about health obstacle of illumination through society instruction and school eduction against students as well as general residents. In case that natural lighting is inappropriate structural of house, we must be able to maintain appropriate illumination through artificial illumination. And so eyes which is core of human life have to be protected, related the authorities, related group, and all health medical personnel will organically cooperate with and make efforts.

• 한국농공학회지
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• 제18권1호
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• pp.4038-4051
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• 1976

This study was intended to provide the basic design creteria for the refrigerated storage, and to estimate the required optimum capacity of refrigerator for the different sizes and kinds of the existing fruit storage. The structural characteristics of the existing fruit storages in Pyungtaek-khun of Kyungki-do were surveyed. The average out-door air temperature during the expected storage life after harvesting, was obtained by analyzing the weather information. The heat transfer rates through the different models of storage walls were estimated. The refrigerating load required for different models of fruit storage was analyzed in the basis of out-door air temperature. The results obtained in this study are summarized as follows: 1. The fruit storages surveyed were constructed on-ground, under-ground and sub-ground type buildings. The majority of them being the on-ground buildings are mostly made of earth bricks with double walls. Rice hull was mostly used as the insulating materials for their walls and ceilings. About 42% of the buildings were with the horizontal ceiling, 22% with sloped ceiling, and about 36% without ceiling. About 60% of the storage buildings had floor without using insulated material. They were made of compacted earth. 2. There is no difference in heat transfer among six different types of double walls. The double wall, however, gives much less heat transfer than the single wall. Therefore, the double wall is recommended as the walls of the fruit storage on the point of heat transfer. Especially, in case of the single wall using concrete, the heat transfer is about five time of the double walls. It is evident that concrete is not proper wall material for the fruit storage without using special insulating material. 3. The heat transfer through the storage walls is in inverse proportion to the thickness of rice hull which is mostly used as the insulating material in the surveyed area. It is recommended that the thickness of rice hull used as the insulating material far storage wall is about 20cm in consideration of the decreasing rate of heat transfer and the available storage area. 4. The design refrigerating load for the on-ground storages having 20 pyung area is estimated in 4.07 to 4.16 ton refrigeration for double walls, and 5.23 to 6.97 ton refrigeration for single walls. During the long storage life, however, the average daily refrigerating load is ranged from 0.93 to 0.95 ton refrigeration for double walls, and from 1.15 to 1.47 ton refrigeration for single walls, respectively. 5. In case of single walls, 50.8 to 61.4 percent to total refrigerating load during the long storage life is caused by the heat transferred into the room space through walls, ceiling and floor. On the other hand, 39.1 to 40.7 percent is for the double walls. 6. The design and average daily refrigerating load increases in linear proportion to the size of storage area. As the size increases, the increasing rate of the refrigerating load is raised in proportion to the heat transfer rate of the wall. 7. The refrigerating load during the long storage life has close relationship to the out-door air temperature. The maximum refrigeration load is shown in later May, which is amounted to about 50 percent to the design refrigerating load. 8. It is noted that when the wall material having high heat transfer rate, such as the single wall made of concrete, is used, heating facilities are required for the period of later December to early February.

• 생물환경조절학회지
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• 제24권3호
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• pp.243-251
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• 2015

근권부 공기순환 덕트 냉방이 온도 및 생육에 미치는 영향을 구명하고자 고온기 파프리카((Capsicumannum.L. 'Veyron')을 코이어배지에서 수경재배하였다. 냉방시간처리는 24시간 연속 가동한 연속냉방(All-day), 17시부터 다음날 1시까지 8시간 냉방한 야간냉방(Night), 대조구인 냉방 무처리(Control) 등 3 처리하여 온실 상 하부 온도, 근권온도, 엽온, 과실 특성 및 기관 분배율을 측정하였다. 근권부 덕트 냉방하였을 때, 고온기(6월 ~8월) 온실하부(바닥으로부터 40cm)와 상부(바닥으로부터 180cm) 온도, 근권온도는 하강되었다. 대조구와 비교하여 온실하부/상부 온도 차이가 연속냉방에서는 $4.4{\sim}5.1^{\circ}C/2.1{\sim}3.1^{\circ}C$ 하강을, 야간냉방 처리에서는 $3.4{\sim}3.8^{\circ}C/2.2{\sim}2.7^{\circ}C$ 하강되었다. 근권온도는 온실 하부 온도 결과와 유사했으며, 연속냉방($22.8^{\circ}C$)> 야간 냉방($24.1^{\circ}C$) > 대조구($27.7^{\circ}C$) 순으로 온도가 낮았다. 연속냉방 처리에서 덕트 위치(통로, 베드하단)와 송풍 방향($45^{\circ}$, $90^{\circ}$, $180^{\circ}$)에 따른 온도 변화를 측정한 결과 덕트의 위치가 통로에 위치하고 송풍방향이 상향($45^{\circ}$) 또는 수평($180^{\circ}$)인 처리는 지상부 100cm까지의 수직 위치에 따른 온도 차이가 크지 않지 않으면서, 근권부위 온도인 지상 50cm 온도가 낮은 특징을 보였고 베드와 베드 공간 사이로 덕트 송풍 방향이 직각($90^{\circ}$)이였을 때는 바닥과 지상 50cm 부위의 온도가 높고, 지상 100cm 이상 200cm 부위 온도가 상대적으로 낮았다. 연속냉방 또는 야간냉방 처리했을 때 파프리카 엽온은 오후 7시가 오전 9시 보다 엽온 하강이 컸다. 과실 분배율은 대조구(24.4%)에 비해 연속냉방(48.6%)과 야간냉방(45.6%)에서 높았으며, 평균과중, 과수 및 수량도 연속냉방 처리에서 가장 높았다. 한편 야간냉방 처리에서도 고온기 평균 지상부 및 근권온도를 낮추었으나, 누적된 평균온도가 가장 낮은 연속냉방처리에서 과실로의 동화산물 분배율을 높여 파프리카 수량을 증가시킨 것으로 보인다.

• 한국학교보건학회지
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• 제1권2호
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• pp.34-49
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• 1988

The purpose of this study is to identify the status of school health and analyze affecting factors of school nurses' self confidence and nursing activities of the secondary school in Seoul. The data was collected from 13th of August to 30th of October. The self reported questionairs were distributed during one of the school nurses seminars held in Seoul and 93 secondary school nurses answered. Analysis of the data was done utilizing SPSS for percentage, mean, T-test ANOVA and Pearson Correlation Coefficients. The results of study are summerized as follows; 1. General Characteristics The mean age of the subjects was 33.4 and mean length of experience as a school nurse was 7.3 years. 79.5 percent of them had clinical experiences and the mean clinic experience was 2.1 years. The majority of them were graduate of the baccalaureate nursing programs and 82.8 percent of them were married. 72.0 percent of the sample had religion, and 60.2 percent of them were in the national or public schools. 90.3 percent of them had independent duty. 2. The status of school health resources In average, there were 2,445 students, 37 classes and 63 teachers per school nurse. 48.4 percent of them were aware of the school budget. The budget for school health was 585,000 won per school in average. 30.0 percent of the schools had school health organization. The schools whose health clinics were on the first floor consisted of 79.3 percent, among them 42.9 percent were on the center of the building office. 3. Activities of school health nursing The average number of students using health clinic were 430 per month. The majority of the problem was digestive problem. There were 7.5 times of mean correspondences with parents per year. The activities of the school nurses were clinic management (29.0%), health care services (23.5%) and health education (14.1%). 4. The degrees of self confidence of the school nurse and nursing activities Self confidence measured by 6 items of self-reported questionaires scored by 4 point Likert Scale revealed. The nurses' self-confidence was 2.922 in clinic management, 2.909 in health education, 2.759 in program planning and evaluation, 2.757 in health care services, 2.692 in management of school environment, and 2.250 in operation of school health organization. The nursing activities scored by 2 point. The nursing activities was 1,870 in program planning and evaluation, 1.853 in health education, 1.843 in clinic management, 1.739 in health care services, 1.696 in management of school environment and 1.265 in operating of school health organization. 5. Factors affecting self confidence and nursing activities of school nurses The general characteristics of the school nurses and the school health resources were related to self confidence and nursing activities. The most significant variable to nurses' self confidence was type of the school ownership and the presence of school health organization was the most significant factor to nursing activities.

• 유기물자원화
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• 제26권2호
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• pp.85-93
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• 2018

톱밥 깔짚우사에서 채취한 젖소 분으로부터 바이오가스를 생산하는 효율을 분석하기 위하여 반 건식혐기소화 실험을 수행하였다. 첫 번째 실험으로서 젖소 분과 돈분 슬러리 그리고 두 가지 축분을 일정비율로 혼합한 재료를 대상으로 메탄 발생 잠재량(BMP; Biochemical Methane Potential) 실험을 수행하였다. 혐기소화 실험기간 동안 발생된 메탄가스의 누적량은 젖소 분이 포함된 처리구에서 더 많은 것으로 나타났다. 두 번째 실험으로서 깔짚우사에서 채취한 젖소 분을 단독으로 소화조에 투입하여 반 건식 혐기소화 실험을 실시하였다. 실험 결과, TS (Total Solids) 농도가 13%인 젖소 분의 적정 HRT (Hydraulic Retention Time)는 25일인 것으로 분석되었으며, TS 농도가 13%인 반응조에서의 바이오가스 발생량은 1.36~1.50v/v-d의 범위였고 평균은 1.44v/v-d 수준이었다. 젖소 분의 TS 농도를 15% 수준으로 설정한 혐기소화조에서의 적정 HRT는 30일이었으며 반응조에서의 바이오가스 발생량은 1.50~1.61v/v-d 수준이었고 평균은 1.47v/v-d 수준이었다. TS 농도가 17% 수준인 혐기소화조에서의 최적 HRT는 30일인 것으로 분석되었다. 이 반응조에서의 바이오가스 발생량은 1.50~1.61v/v-d 이었고 평균은 1.55v/v-d 수준이었다.

• 한국환경생태학회지
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• 제30권4호
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• pp.783-792
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• 2016

본 연구는 목포 유달산을 중심으로 한 인근 도서에 분포하는 왕자귀나무군락의 식생구조 및 입지환경 특성을 밝히고자 실시되었다. 목포 유달산의 왕자귀나무군락(군락 I)은 상대적으로 해발고가 높은 곳에 위치했고, 주요 수종의 수령은 30년 정도였다. 이 군락은 지속적인 교란으로 식생발달 초기단계의 식생구조를 보였다. 바닷가 인근 평지의 모래토양에 형성된 군락 IV는 주요 수종의 수령이 9년 정도였다. 이 군락은 비교적 최근 인위적으로 교란된 곳에 열악한 환경에 적응력이 강한 왕자귀나무가 유입되어 순림을 형성한 것으로 추측된다. 그 외 군락(II, III)은 왕자귀나무와 낙엽성 참나무류가 서로 경쟁하는 식생상황을 보였으며, 주요 수종의 수령은 13~30년이었다. 상대적으로 식생구조가 발달한 왕자귀나무군락일수록 바닷가 인근에 해발고가 높은 급경사에 위치했다. 식생발달 초기단계에는 임상으로 유입되는 광합성 유효광이 많아 관목층에 왕자귀나무의 치수발생 및 생장량이 높았다. 왕자귀나무는 바닷가 훼손지나 척박한 토양에 적응력이 강해 이러한 곳에 출현할 가능성이 높았다. 하지만, 식생구조가 발달하여 지력이 높을수록 낙엽성 참나무류와의 경쟁에 밀려 왕자귀나무의 세력이 약해졌다.

• 설비공학논문집
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• 제27권7호
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• pp.369-374
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• 2015

This study analyzed analyzes the energy performance of six houses in Daejeon completed which were built in 2011. Observed The observed houses, which were all designed and constructed inof the same size and structure, are were highly insulated with triple Low-E coating windows; the insulation level of the walls is was $0.13W/m^2K$ and that of the roof is was $0.10W/m^2K$. As electric houses, all of the energy supplied to the houses, including for cooking, is was supplied by electricity. A and 3~4 kWp of photovoltaic system and a 3~5 kW of ground source heat pump (GSHP) were installed in each house tofor providing provide space heating/and cooling and hot water are installed. We constructed a Web-based remote monitoring system in order to understand energy consumption and the dynamic behavior of the energy system. T, and the results of our metering data analysis of 2013 are as follows. First, the annual residential energy consumption is was 4,400 kWh (${\sigma}=1,209$) and GSHP energy consumption is was 5,182 kWh (${\sigma}=1,164$). Second, residential energy consumption ranked highest in average energy usage, with at 45% of the total, followed by heating with at 30%, hot water supply with at 17% and cooling with at 6%. Third, the average energy independence rate is was 51.8%, the GFA (Gross gross floor area) criteria average energy consumption unit is was $48.7kWh/m^2yr$ (${\sigma}=10.1$), and the net energy consumption unit (except the energy yield of the PV systems) is was $24.7kWh/m^2yr$ (${\sigma}=8.8$).