• The Korean Journal of Ecology
• /
• 제8권2호
• /
• pp.61-68
• /
• 1985

The modeling of interception and absorption of light was studied in plant canopies at Mt. Kwanak. Followering results were obtained. Light intensity passing through the stacked leaves is attenuated exponentially. This phenomenon seems to be more clearly applied to the plant canopies, if they have large cumulative leaf area and are matured densely. Light interception and absorption are influenced by leaf thickness, shape pigments, and leaf area, and they have great effect on the maturation of canopies. It was confirmed that the light penetrating through the stratified canopies is decreased exponentially in dual pattern. The cumulative leaf area of a definite space in a certain plant canopy is the same as the growth of leaf area of the canopy at that time. A hypothetical model for calculating the light absorption in plant canopies, was established on the bases of phenomena that incident light is captured at the maximum level and light inerception effect is minimized by leaves.

• 지식경영연구
• /
• 제13권5호
• /
• pp.139-160
• /
• 2012

Win-win growth between large companies and small and medium enterprises (SMEs) become a critical encomic and social issue in Korea. Korea government has been attempted to establish strong policy to build right win-win relationship between large companies and SMEs. Along with this strong drive from Korea government, a variety of strategies that enhance win-win relationships between large companies and SMEs have been adopted. Win-win growth policy is expected to provide positive impact on sustainable competitive advantage of firms. Therefore, many studies have focused on the win-win growth policy success factors, type of the policy, and the results of the policy. Although there is much literature on the win-win growth policy, the effects of win-win policy on firm value is not well understood. We addressed this issue by exploring how win-win growth policy influences a firm's market value using event study methodology. We evaluated the cumulative abnormal returns for win-win growth policy announced by Korean large firms from 2004 to 2012. The results of this study insisted that the announcements of win-win growth policy show negative impact on firm's market value, which is not consistent with previous studies. The findings of this study offer insights that may help government policy makers and managers to revise their policy for better outcomes of their win-win growth policy.

• Asian-Australasian Journal of Animal Sciences
• /
• 제25권12호
• /
• pp.1701-1711
• /
• 2012

Okinawan Awamori is produced by fermenting steamed indica rice with black mold, yeast, and water. Awamori-pressed lees is a by-product of the Awamori production process. Tofu lees is a by-product of the Tofu production process. This research consisted of two experiments conducted to elucidate whether or not dried Awamori-pressed lees and Tofu lees can be used as a mixed feed ingredient for raising female goats. In experiment 1, digestion trials were conducted to ascertain the nutritive values of dried Awamori-pressed lees and dried Tofu lees for goats. The digestible crude protein (DCP) and total digestible nutrients (TDN) contents of dried Awamori-pressed lees and Tofu lees were 22.5%, 22.5% (DCP), and 87.2%, 94.4% (TDN) respectively. In experiment 2, 18 female goats (Japanese Saanen${\times}$Nubian, three months old, body weight $15.4{\pm}0.53$ kg) were divided into three groups of six animals (control feed group (CFG), Awamori-pressed lees mixed feed group (AMFG), Tofu lees mixed feed group (TMFG)). The CFG control used feed containing 20% soybean meal as the main protein source, while the AMFG and TMFG treatments used feed mixed with 20% dried Awamori-pressed lees or dried Tofu lees. The groups were fed mixed feed (volume to provide 100 g/d increase in body weight) twice a day (10:00, 16:00). The klein grass hay and water was given ad libitum. The hay intake was measured at 08:00 and 16:00. Body weight and size measurements were taken once a month. At the end of the experiment, a blood sample was drawn from the jugular vein of each animal. The DCP and TDN intakes in AMFG and TMFG showed no significant difference to the CFG. Cumulative measurements of growth in body weight, withers height, chest depth, chest girth, and hip width over the 10 mo period in the AMFG and TMFG were similar to the CFG. By contrast, cumulative growth in body length and hip height in the AMFG and TMFG tended to be larger than the CFG. Cumulative growth in chest width in the AMFG was significantly larger (p<0.05) than the CFG. Blood parameter values were similar to those in normal goats reported by other scientists. The coats of the AMFG and TMFG animals looked shinier than the animals in the CFG. The results demonstrate that dried Awamori-pressed lees and Tofu lees can be used as a feed ingredient for the raising female goats.

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

• 한국발생생물학회지:발생과생식
• /
• 제16권2호
• /
• pp.107-112
• /
• 2012

Early growth, the rate of yolk sac absorption, and nucleus size in liver parenchymal cells were correlated with the nutritional status of first feeding larval haddock, Melanogrammus aeglefinus. Larvae that successfully began exogenous feeding maintained high growth rates, delayed yolk sac resorption, and had larger hepatocyte nuclear sizes than starved larvae. At 10 days post hatch (DPH) the cumulative mortality in the starved larval haddock group was 100%. The area of the hepatocyte nuclei in starved larvae gradually decreased, reaching its lowest value by 9 DPH. Our results support the current practice of providing the first food supply at 3 DPH. Hepatocyte nuclear size can be used to assess larval haddock nutrition status, and may be a good criterion for assessing the success of transition from endogenous to exogenous feeding.

• 환경영향평가
• /
• 제4권3호
• /
• pp.87-94
• /
• 1995

At both international and national levels, such as in the Rio Declaration and the EU's Fifth Environmental Action Plan, governments have committed themselves to the adoption of the precautionary principle (UNCED 1992, CEC 1992). These commitments mean that the existence of uncertainty in appraising policies and proposals for development should be acknowledged. Uncertainty arise in both the prediction of impacts and in the evaluation of their significance, particularly of those cumulative impacts which are individually insignificant but cumulatively damaging. The EC network of EIA experts, stated at their last meeting in Athens that indirect effects and the treatment of uncertainty are one of the main deficiencies of current EIA practice. Uncertainties in decision-making arise where choices have been made in the development of the policy or proposal, such as the selection of options, the justification for that choice, and the selection of different indicators to comply with different regulatory regimes. It is also likely that a weighting system for evaluating significance will have been used which may be implicit rather than explicit. Those involved in decision-making may employ different tolerances of uncertainty than members of the public, for instance over the consideration of the worst-case scenario. Possible methods for dealing with these uncertainties include scenarios, sensitivity analysis, showing points of view, decision analysis, postponing decisions and graphical methods. An understanding of the development of cumulative environmental impacts affords not only ecologic but also socio-economic investigations. Since cumulative impacts originate mainly in centres of urban or industrial development, in particular an analysis of future growth effects that might possibly be induced by certain development impacts. Not least it is seen as an matter of sustainability to connect this issue with ecological research. The serious attempt to reduce the area of uncertainty in environmental planning is a challenge and an important step towards reliable planning and sustainable development.

• Journal of the Korean Data and Information Science Society
• /
• 제27권4호
• /
• pp.969-977
• /
• 2016

야외에서 재배되는 주요 채소류의 생산에 대한 기상변화의 영향력이 점차 커지고 있다. 기상변화로 인한 농작물 생산량의 변화는 공급과 수요의 불안정과 물가안정의 불안요소로 작용하고 있다. 본 논문에서는 패널회귀모형을 이용하여 기상상태에 따른 마늘의 생산량을 추정하였다. 2006년부터 2015년까지의 마늘 주산지 15곳의 10a당 마늘 생산량과 해당 지역의 기상자료를 사용하였다. 7가지 기상요인 (평균기온, 평균최저기온, 평균최고기온, 누적강수량, 누적일조시간, 평균상대습도, 평균지면온도)의 월별 (1월-12월)자료인 총 84개 기상변수중 다중회귀분석 단계선택방법을 통하여 7가지 기상변수를 선택하여 패널회귀모형에 사용하였다. 고정효과 모형과 확률효과 모형을 구분하는 하우스만 검정을 통하여 확률효과 모형으로 분석한 결과 평균최고기온 (1월), 누적강수량 (3월, 10월), 누적일조시간 (4월, 10월)등이 마늘 생산량 추정에 유의한 변수로 나타났다. 또한 연도별로 추정된 생산량 추정값의 추이가 실제 생산량과 동일한 추세를 보이고 있어 제안된 패널 회귀 모형이 잘 적합됨을 확인할 수 있다.

• 한국전통조경학회지
• /
• 제29권4호
• /
• pp.78-86
• /
• 2011

산성의 복원과정에서 조망 확보를 위해 산림경관에 대한 정비가 요구된다. 본 연구에서 산성에 대한 조망 확보를 위한 산림경관 관리방안이 제시되었다. 관리방안의 검증을 위해 GIS를 이용한 시곡면과 누적가시도 분석이 이용되었다. 경주 명활산성에 대해 경관 분석과 산림정비계획 수립, 수목 제거사업 등의 결과가 비교되었다. 연구결과는 다음과 같다. 첫째, 외부의 주요 조망점에서 명활산성에 대한 누적가시도 분석을 시행하였다. 분석결과를 활용하여 산성에서 우수가시구간의 선정이 가능하였다. 6개의 우수가시구간은 총 길이가 1,937m(전체 구간의 41.2%)이다. 둘째, 우수가 시구간에 대해 수목의 평균높이와 우점종인 소나무의 최대 성장높이를 반영한 시곡면 분석을 비교하였다. 비교결과, 수목의 평균높이를 반영하는 것이 최대 성장높이를 반영한 것보다 식생에 대한 훼손을 최소화하면서 산성의 가시성을 확보하는데 효과가 있을 것으로 판단되었다. 셋째, 도출된 정비구역 중에서 가시빈도가 높은 A구역이 타당성 검토를 위해 선정되었다. 주요 조망점에서의 가시 여부를 검토하면서 A구역에 대한 수목 제거작업이 수행되었다. 비교결과, 정비계획($10,935m^2$)과 제거지역($11,296m^2$)은 미미한 차이(3.3%)가 발생하였다. 이를 통해 산성 주변의 산림경관 정비를 위한 누적가시도와 시곡면 분석법의 효용성이 검증되었다.

• KSBB Journal
• /
• 제10권3호
• /
• pp.323-334
• /
• 1995

Hybridoma 세포의 세포 성장 속도, monoclo nal antibody의 생산성 및 세포 대사에 미치는 glucose의 영향이 조사되었다. IgG2,를 생산하는 m mouse-mouse hybridona VIII H-8 세포가 모델로 이용되었다. Glucose 농도에 따른 바성장속도의 변화는 기질저해형식 (substrate inhibition type) 의 성장모델로 나타낼 수 있었다. 초기 glucose 농도 4g/f까지는 최대 세포밀도의 증가를 보여 주었다. Glucose는 세포사망속도에 큰 영향을 나타내었고 glucose 농도와 비사망속도 간에는 반비례의 관계가 성립됨을 보였다. Glucose 농도가 증가될수록 세포의 생존율과 monoclonal an tibody의 생산이 증가되었다. Glucose 놓도가 증가될수록 glucose의 비소비속도가 증가되 었고, 초기 glucose 농도의 증가는 lactate의 총괄 비 생산속도의 증대를 가져왔다. 암모늄 이온의 총괄비 생산속도는 초기 Glucose의 농도에 의존하 였지만 암모늄 이온의 전반적인 생성속도는 초기 glucose 농도에 거 의 무관함을 보여 주었다.

• 한국수산과학회지
• /
• 제49권6호
• /
• pp.823-829
• /
• 2016

Yacon (YC), ginger (GG) and blueberry (BB) were added to the diet of juvenile rockfish Sebastes schlegeli to investigate the effects of these substances on growth, feed utilization and resistance to Streptococcus iniae compared to feed additive ethoxyquin. A total of 480 fish were distributed in 12 tanks and four experimental diets [control (Con), with 0.01% ethoxyquin, and 1% YC, GG and BB diets] were provided in triplicate. After an 8-week feeding trial, 20 fish from each tank were infected with Streptococcus iniae. Fish fed the BB diet had higher weight gain than fish fed the GG and Con diets. Feed efficiency of fish fed the GG and YC diets was higher than that of fish fed the BB and Con diets. The protein efficiency ratio of fish fed the GG diet was higher than that of fish fed any other diet. The cumulative mortality 54 h after infection of fish fed the Con diet was higher than that of fish fed any other diet. These results indicate that YC, GG, and BB are effective dietary additive, not only improving growth performance and feed utilization but also lowering the mortality of juvenile rockfish exposed to S. iniae.