• 산업경영시스템학회지
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• 제22권53호
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• pp.23-35
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• 1999

Since on-time delivery is becoming increasingly important in today's competitive markets, the development of effective scheduling methodologies to meet customer needs through on time delivery is of vital importance for the well-being of companies. The objective of this study is to develope a general heuristic algorithm for scheduling both the static and dynamic problems under certain on-time delivery criteria. For the problems with due-date related, we present insights for minimizing the number of tardy jobs and propose a heuristic scheduling algorithm. Experimental results show that the proposed algorithm performs significantly better than other dispatching rules within reasonable computation time, specially in the environment of strong competition for resources.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2002년도 심포지엄
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• pp.31-36
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• 2002

This experiment was conducted to investigate the effects of turf grass growth to seedling rates and bed soil types. The results of this experiment were summarized as follows; the more increasing the seedling rates, the plant height and leaf length were longer, but the number of leaf and number of branch were fewer. In case of transplanting of turf grass seedling by rice transplanting machine, it might be considered that the proper alternative bed soil was sandy loam soil with regarding to the economic aspects. The maximum seedling rate of turf grass in the seedling tray for rice was 1,000 of seedling amount due to the nutrient competition with intensive seedling. As the results indicated, it might be recommended that the proper alternative bed soil was sandy loam soil with 1,000 of seedling rates in case of transplanting of turf grass seedling by rice transplanting machine.

• 정보기술과데이타베이스저널
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• 제5권1호
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• pp.51-67
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• 1998

There exist a number of information systems planning(ISP) methodologies. As the level of market competition gets intensified, firms are more likely to engage in organizational transformations such as BPR and CPI(continuous process improvement). Because this new requirement should be incorporated into ISP methodology, the number of ISP methodologies available will be continually increasing. However, we could not find a framework for understanding and classifying these divergent methodologies. So, we here present a framework for classifying ISP methodology classes. With this framework, we categorize different classes of ISP methodologies and identify their limitations in terms of missing elements and links. And we move on to present new technical innovations and other methodological advances that, if properly integrated with ISP methodologies, would help us derive an IT infrastructure plan more effectively. Furthermore, in search of software tools or aids supporting the application of ISP methodologies, we identify requirements of ISP-supporting software tools and evaluate functions of existing software tools, then suggesting a future direction to that end.

• Asia Marketing Journal
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• 제20권2호
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• pp.1-27
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• 2018

This study examines the effects of dependence and conflict on organizational performances in partnership, qualitatively (trust) and quantitatively (sales) under four control variables (period of business, number of goods, competition density, and number of employees). Also, this study presents termination cost and alternative attractiveness as the antecedents of dependence, goal incongruity and unfairness as the antecedents of conflict. As the results of analysis with survey data from 360 distributors in manufacturer-distributor partnership, 7 hypotheses are supported and 2 hypotheses are rejected. The results of structural equation modeling (SEM) verify that termination cost increases dependence, that alternative attractiveness reduces dependence, that goal incongruity and unfairness increase conflict, that dependence reduces conflict, that dependence increases trust, and that conflict reduces trust. However, unexpectedly, dependence reduces sales, and conflict has no impact on sales. The results of this study provide insightful implications theoretically and managerially to scholars and practitioners interested in partnership.

• KDI Journal of Economic Policy
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• 제36권4호
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• pp.1-32
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• 2014

주파수와 같이 매우 희소한 경제적 자원을 배분하는 경우 경매는 배분적 외부성으로 인하여 비효율적 결과를 낳을 수 있다. 경매수입이 아닌 사회후생을 기준으로 하면, 경매를 통한 배분은 경매참여자가 2인일 때에도 비효율적일 수 있다. 이는 2위 기업이 주파수를 더 효율적으로 활용할 수 있다 하더라도 이를 통해 얻는 이익은 크지 않은 반면에 선도기업이 시장을 잠식당함으로써 입는 손실이 클 때 발생한다. 2-경기자 호텔링 모형을 사용하여 분석한 결과, 2위 기업의 입찰가에 어떠한 승수를 곱함으로써 2위 기업을 경매에서 유리하게 만들 경우 경매를 통한 배분 결과가 파레토 개선된다. 승수는 시장점유율을 바탕으로 구할 수 있으며 시장점유율 격차가 클수록 높다.

• 한국잡초학회지
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• 제2권2호
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• pp.114-121
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• 1982

매년(每年) 발생량(發生量)이 증가(增加)되고 분포면적(分布面積)이 확대(擴大)되어 수도(水稻)에 많은 피해(被害)를 주고 있는 논다년생잡초(多年生雜草) 올미의 괴경형성(塊莖形成)에 미치는 요인(要因)과 경합생태(鏡合生態)를 구명(究明)하고자 시험(試驗)하였던 바 다음과 같은 結果을 얻었다. 1. 성묘이앙답(成苗移秧畓)에서보다 추묘기계이앙답(推苗機械移秧畓)에서 올미의 발생량(發生量)과 괴경형성량(塊莖形成量)이 많았다. 2 수도(水稻)가 올미에 의해서 경합(競合)이 가장 심(甚)했던 시기(時期)는 이앙후(移秧後) 31일(日)부터 37일(日)까지였다. 3. 올미와 수도(水稻)가 경합(競合)하는 조건(條件)에서 쇠털골의 증가(增加)에 따라 올미수(數)가 현저(顯著)히 감소(減少)되었다. 4. 크기가 작은 괴경(塊莖)은 토심(土深)이 깊었을 경우 큰 괴경(塊莖)에 비하여 신괴경형성량(新塊莖形成量)이 현저(顯著)히 적었다. 5. 올미는 이식밀도(移植密度)를 높여감에 따라 종내경합도(種內競合度)가 점증(漸增)되었다. 6. 높은 시비수준(施肥水準)에서 올미(數), 괴경형성수(塊莖形成數)의 증가(增加)가 현저(顯著)하였다. 7. 수도재배조건(水稻栽培條件)에서 올미개체당(個體當) 3~4개(個)의 괴경(塊莖)을 형성(形成)하였다. 8. 올미의 괴경형성(塊莖形成)에는 질소(窒素) 또는 인산(燐酸)이 가리(加里)보다 더 많이 관여(關與)하였다. 9. 토양유기물함량(土壤有機物含量) 2.0% 이상(以上)에서는 괴경형성수(塊莖形成數)의 증가폭(增加幅)이 적었다. 10. 토양수분(土壤水分) 100% 조건(條件)에서 올미괴경(塊莖)은 담수조건(湛水條件)과 대등(對等)한 괴경(塊莖)의 출아율(出芽率) 및 출아일수(出芽日數)를 보였으나 괴경형성수(塊莖形成數)에서 50% 정도(程度) 감소(減少)되었다.

• Journal of Plant Biology
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• 제12권2호
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• pp.28-42
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• 1969

Field studies were conducted with the split plot design of 20 treatment with a combination of 4 levels of 3, 5, 7 and 9 plants per hill and 5 levels of 60, 80, 100, 120 and 140 hills per 3.3$m^2$ on non-, low- and high-salty areas. Rice variety, Kusabue was grown under jthe standard fertilization and cultivating. Investigation was made on the productive structure of plant population, leaf-area index, light intensity curve by stratum of crop population at the panicle differentiation stage. The competition density effect on the photosynthetic capacity was low as the salt concentration became higher. This seemed to suggest the possiblity of an increased yielding capacity by closer planting in the salty areas. The effect of an increased number of hills per unit area was greater than that of an increased unmber of plants per hill due to the total leaf area and space distribution of the actie assimilation parts of rice plants. The number of ppanicle per unit area in the salty areas were increased when the number of hill per 3.3$m^2$ increased over an increased number of plants per hill, and the panicle weight was reduced by close planting in the non-lalty area, while it was not reduced so much in the salty areas. The number of grains per panicle was significantly decreased by close planting in the salty areas as in the non-salty area, and ratio of matured grain was not decreased even by close planting in the salty areas, while it was significantly decreased by close planting in the non-salty area. An increase in the rice yield was possible by close planting and greatly related to leaf area index in the salty areas but not in the non-salty area. Increasing the number of hills per unit area showed greater effect on the increase of the rice yield than an increased number of plants per hill in the salty areas. Relationships between the growth characteristics and the rice population affected by plant spacing mode for maximum production were discussed.

• 디지털융복합연구
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• 제18권6호
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• pp.523-529
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• 2020

본 연구는 근대5종 세계대회 데이터베이스에서 2015년부터 총 5년간의 공식 세계기록을 수집하여 사격 유형 및 특성이 기록에 미치는 영향을 밝혀내고자 했다. 이를 위해 UIPM Level 1 대회인 월드컵, 세계선수권대회 출전한 남녀 모든 선수에 대해 전체 사격 격발 경우를 분석하였다. 연구결과 왕복횟수와 차수가 늘어날수록 사격누적기록이 나빠지는 양상을 보였고, 1번째 왕복 3차 사격에서 가장 좋은 기록을, 4번째 왕복 5차 사격에서 가장 나쁜 기록이 나타났다. 또한, 첫발의 성공 유무에 따른 누적사격기록 편차 값은 왕복횟수가 늘어남에 따라 9%가량 편차가 증가하는 경향성이 나타났는데 이는 시간이 지남에 따라 첫발의 성공은 더욱 중요하며 근대5종 사격 시 첫발 명중만으로 기록단축에 큰 효과를 거둘 수 있다. 이러한 연구를 바탕으로 사격 정확성에 영향을 미치는 요인 및 특징을 밝히고, 복합경기 특성에 맞게 육상기록과 연계한 후속 연구가 필요하다고 사료된다.

• 디지털콘텐츠학회 논문지
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• 제19권1호
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• pp.173-179
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• 2018

최근 차량의 증가와 주차공간의 부족으로 주차를 이용한 사업이 늘어나고 있다. 주차사업에서 주차관제가 필수적인 요소가 되고 있고, 주차관제업체가 점점 늘어나는 계기가 되었다. 그러나 업체수가 점점 늘어나고 경쟁이 치열해 짐에 따라, 새로운 서비스를 창출하거나, 기술적 우수성을 가지거나, 현재 시스템 개선을 통해서 비용을 절감하려는 노력이 이루어지고 있다. 본 논문에서는 효과적인 주차산업을 위한 클라우드 기반의 자동차번호인식(LPR) 서비스를 이용한 주차관제시스템을 구현하였다. 제안하는 시스템은 구조적인 개선을 통해 비용을 절감하고, 설치를 간소화 하며, 장애나 업데이트시 빠르게 대응 가능하다.

• Journal of Ecology and Environment
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• 제48권3호
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• pp.277-284
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• 2024

Background: Newly introduced transgenic plants can outcompete native species in natural ecosystems, threatening the biodiversity of a country. This study ascertained the weediness potential of plants according to the seed amount under the assumption that transgenic seeds were unintentionally spilled. Using sunflowers as the study system, 0, 50, 100, and 150 seeds were sown in 1 m × 1 m and 2 m × 2 m plots, and seed germination, survival, flowering, and competition between the surviving and wild plants were investigated. Results: There was no significant difference in the germination rate of sunflowers depending on the cultivar, but differences were observed depending on the sowing density and plot size. As the number of seeds sown increased, the flowering and seed maturation of sprouted plants occurred earlier; the plant height and flower length of the surviving plants decreased. In addition, as the number of seeds increased, not only did the early importance of sunflowers increase, but the period of dominance over weeds also improved. Conclusions: These results suggest that the weediness potential of sunflowers varies with the number of seeds at the time of release, which may affect germination and growth, and compete with weeds in transgenic plants.