• 한국잠사곤충학회지
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• 제17권2호
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• pp.97-100
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• 1975

추잠기의 적엽정도가 지조의 수량에 미치는 영향을 알기 위하여 시험을 한 바 다음과 같은 결과를 얻었다. (1) 추기에 있어서의 적엽의 영향은 조장이나 조률과 같은 형태적인 면보다는 조량과 같은 질적인 면에 더 크게 나타나고 있다. 2. 조량은 중간부적엽구를 제외하고는 추잠기의 적엽량과 반비례하여 무적엽구, 불반부적엽구, 중간부적엽구가 크고 상반부적엽구와 전적엽구는 작았는데 중간부적엽구는 추기의 적엽량이 많았는데도 조량이 컸다. (3) 춘잠기의 수량은 조량과 정비례의 관계에 있어 조량이 큰 무적엽구, 중간부적엽구, 하반부적엽구의 순위대로 많았고, 상반부적엽구, 전적엽구의 순으로 적었다. (4) 연간합계수량은 중간부적엽구가 가장 많아서 무적엽구에 비한다면 36％, 가행법인 전적엽구(상단 5잎 남기고)보다는 13％정도 많았다.

• Asian-Australasian Journal of Animal Sciences
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• 제20권3호
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• pp.359-364
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• 2007

The objective of this study was to evaluate monthly variation in semen characteristics in Black Bedouin and Black Bedouin${\times}$Damascus crossbred bucks. Twenty one Black Bedouin Goat bucks (BG) and 20 $F_1$ Black Bedouin${\times}$Damascus crossbred goat bucks (CB) were used in the study. Animals were 2 to 5 years old at the beginning of the study. Body weight (BW), body condition score (BCS), scrotal circumference (SC) and semen samples were evaluated monthly for all bucks. Body weight, BCS and SC differed according to month of collection (p<0.0001). Body weight and BCS were greater in the spring and summer months while SC reached their highest values during the autumn months. No differences were detected between breeds with respect to semen characteristics with the exception of ejaculate volume (p<0.05) and ejaculate appearance (p=0.053) which were greater in CB than in BG bucks. With the exception of ejaculate appearance, all semen characteristics were influenced by month of collection (p<0.05). Semen concentration and motility were better during the late summer and autumn months than during the spring. The percentage of abnormal spermatozoa declined from its greatest values in the spring to its lowest values in the autumn. Results of the present study show no effects of goat breed on most of the studied parameters. In general, most semen quality parameters were better in both breeds during the autumn than the spring months. Minimal variation in semen quality was observed between the summer and autumn months indicating the ability to use bucks for semen collection and for natural breeding during both of these seasons.

• 한국잠사곤충학회지
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• 제5권
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• pp.1-5
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• 1965

추잠기의 적엽이 익춘의 불발아와 접목의 활착에 미치는 영향을 조사하여 다음과 같은 결과를 얻었다. (1) 추잠기의 적엽은 익춘의 불발아비율을 증대시키는 원인이 되며 특히 전적엽을 하면 적엽을 하지 않은 것에 비하여 불발아비율이 46%나 증대한다. 그리고 동일한 기조에서 일부분의 엽을 여러가지 방법로 적채하였을 경우에 있어서도 적엽을 한 부분의 불발아율이 적을 하지 않은 부분의 그것 보다 크다. (2) 추잠기의 적엽은 익춘에 그 동아를 일아근접하였을 때에 있어서 그 활착비율을 크게 저하하며 동일지조에 있어서 여러가지 방법으로 적엽을 하였을 경우에 있어서도 적엽을 한부분의 동아의 활착이 적엽을 하지 않은 부분의 보다 항상 좋지 않다. (3) 추잠기에 적엽을 하면 익춘잠기의 수량을 7∼20％ 저하시키며 특히 기조의 하반부적엽(20%)과 전적엽구(12％)가 그 정도가 심하다.

• 한국초지조사료학회지
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• 제10권2호
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• pp.89-95
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• 1990

This experiment was carried out to determine the effects of nitrogen(N) fertilizer levels (0, 120, 240 and 360kg $ha^{-1}Y^{-1}$ Y-') on seasonal grass growth, dry matter (DM) yield and botanical composition in pasture under shade condition. Investigation date was on 7 , 14, 21, 28 and 35 days after harvesting in spring (May), summer (July) and autumn (Sept.), 1988, respectively. Shade degree was controlled artificially ca. 45-50%, and each annual level of N was distributed 5 times equally. Grass growth and DM productivity were most vigorous in spring. Higher DM yield was produced with N 240 kg spring, and Nl2Okg in summer and autumn. Higher significant relationships, in spring, were found between grass height and DM, and N level and DM yield. However, low relationships were observed between those in summer and autumn. In botanical composition, grass coverage was decreased in summer and autumn, and bareland was increased, especially in higher N plots. Based on the results, it is suggested that 200kg $ha^{-1}$ of N in this experiment is more effective for forage production and pasture persistence. Also a littie more amount of N (50-70kg $time^{-1}$) in spring, and low level of N (20-30kg $time^{-1}$) in summer and autumn may be desirable.

• 수산해양기술연구
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• 제54권2호
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• pp.146-156
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• 2018

Acoustic surveys were conducted in the seas surround the South Korea (South Sea A, South Sea B (waters around the Jeju Island), West Sea and East Sea) in spring and autumn in 2016. First, the vertical and horizontal distributions of fisheries resources animals were examined. In most cases vertical acoustic biomass was high in surface water and mid-water layers other than South Sea A in autumn and West Sea. The highest vertical acoustic biomass showed at the depth of 70-80 m in the South Sea A in spring ($274.4m^2/nmi^2$) and the lowest one was 10-20 m in the West Sea in autumn ($0.4m^2/nmi^2$). With regard to the horizontal distributions of fisheries resources animals, in the South Sea A, the acoustic biomass was high in eastern and central part of the South Sea and the northeast of Jeju Island ($505.4-4099.1m^2/nmi^2$) in spring while it was high in eastern South Sea and the coastal water of Yeosu in autumn ($1046.9-2958.3m^2/nmi^2$). In the South Sea B, the acoustic biomass was occurred high in the southern and western seas of Jeju Island in spring ($201.0-1444.9m^2/nmi^2$) and in the southern of Jeju Island in autumn ($203.7-1440.9m^2/nmi^2$). On the other hand, the West Sea showed very low acoustic biomass in spring (average NASC of $1.1m^2/nmi^2$), yet high acoustic biomass in the vicinity of 37 N in autumn ($562.6-3764.2m^2/nmi^2$). The East Sea had high acoustic biomass in the coastal seas of Busan, Ulsan and Pohang in spring ($258.7{\sim}976.4m^2/nmi^2$) and of Goseong, Gangneung, Donghae, Pohang and Busan in autumn ($267.3-1196.3m^2/nmi^2$). During survey periods, fish schools were observed only in the South Sea A and the East Sea in spring and the West Sea in autumn. Fish schools in the South Sea A in spring were small size ($333.2{\pm}763.2m^2$) but had a strong $S_V$ ($-49.5{\pm}5.3dB$). In the East Sea, fish schools in spring had low $S_V$ ($-60.5{\pm}14.5dB$) yet had large sizes ($537.9{\pm}1111.5m^2$) and were distributed in the deep water depth ($83.5{\pm}33.5m$). Fish schools in the West Sea in autumn had strong $S_V$ ($-49.6{\pm}7.4dB$) and large sizes ($507.1{\pm}941.8m^2$). It was the first time for three seas surrounded South Korea to be conducted by acoustic surveys to understand the distribution and aggregation characteristics of fisheries resources animals. The results of this study would be beneficially used for planning a future survey combined acoustic method and mid-water trawling, particularly deciding a survey location, a time period, and a targeting water depth.

• 한국잠사곤충학회지
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• 제18권1호
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• pp.11-15
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• 1976

한국의 잠병피해율을 알고자 경북 전역에 걸쳐 1975년 추기 조사하여 분석한 결과 1. 병피해 농가비율은 18.5%이고 상자당 공판량은 무피해 농가가 27.0kg인데 비하며 18.2kg으로 변이의 폭이 크고 평균 미달농가가 상대적으로 많았다. 2. 한국의 총수잠량중 잠병에 의한 감산량은 약 838M/T으로 추산되며 피해율은 5.6%으로 추산되었다. 3. 농병ㆍ연화병이 각각 40.9%, 34.5%로 추잠기잠병의 대부분이었다.

• International Journal of Industrial Entomology and Biomaterials
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• 제4권1호
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• pp.77-81
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• 2002

A new non-cocooning silkworm variety, Hachojam, suitable for autumn rearing season is single cross Fl hybrid between Japanese race Jam 307 and Chinese race Jam 126. Jam 307, Japanese parent of the Hachojam, which is a source for non-cocooning process showed a high GCA (generation combining ability) in naked pupation rate and Jam 126, Chinese parent, showed a high GCA in pupation rate and single pupal weight. In the local adaptability test performed at 8 local areas in autumn of 1999 to 2000, the naked pupation rate and thin cocoon rate of Hachojam were 64.7% and 35.3% , respectively. The pupal weight calculated from 10,000 of the 3rd molted larvae was 24% heavier in Hachcjam than the cocoon-producing, check variety Daesungjam.

• 한국미생물·생명공학회지
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• 제27권6호
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• pp.515-517
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• 1999

From the soils collected seasonally at the 0.5~2cm and 50$\pm$1cm depths of riverside, different strains of actinomycetes were isolated and identified to the genus. At the 0.5~2cm depth, Streptomyces and rare actinomycetes were in total 73 and 62 strains, respectively. Streptomyces was approximately 2-fold more in spring and autumn than summer, and rare actinomycetes was at least 4-fold more in autumn and winter than spring. At the 50$\pm$1cm depth, Streptomyces and rare actinomycetes were in total isolated 53 and 41 strains, and these were at least 2-fold more diverse in autumn than spring, summer, and winter.

• 설비공학논문집
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• 제4권4호
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• pp.316-322
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• 1992

A simplified TAC method was developed for the selection of solar atmospheric transmittance data fundamental to the calculation of design solar radiation for the peak cooling load calculation using ETD method. The summer and autumn solar atmospheric transmittance data of the 11 major cities in Korea were obtained. Based on the simplified TAC method, the atmospheric transmittance data were selected by the TAC 2.5% of July instead of the TAC 2.5% of June through September for summer and the TAC 5.0% of October instead of the TAC 2.5% of October and November for autumn. Results show that the atmospheric transmittance data at solar noon were in the range of 0.61-0.66 for summer and 0.78-0.82 for autumn except for Pusan and Incheon.

• 한국의류산업학회지
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• 제3권1호
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• pp.20-24
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• 2001

The primary objective of this study was to empirically explore the mechanical properties of marketing Korean fabrics by using KES-FB system and estimate the sewability of Korean clothes by the mechanical properties. From the empirical research, it was found that Korean fabrics for spring and summer has been transformed easier and less flexible by shearing Korean fabrics for autumn and winter. Also, it was found that there is a significant difference in the hand value as tensile, surface and compression. It was found that Korean fabrics for spring and summer has a stiffness and elastic properties of matter and Korean fabrics for autumn and winter has a bulky and abundant elasticity. Finally, it was found that Korean fabrics for autumn and summer in the joint of account of the mechanical properties. Also, the difficulties of process has been expected by sewability like seam-pucker, over feed, sewing and steam-press.