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        검색결과 36

        2.
        2022.09 구독 인증기관·개인회원 무료
        Maize is an important cereal crop widely grown in all of Nigeria’s agroecology based on its economic and food values. This has led to its optimum production with Nigeria ranking top 12th maize producer in the world. Presently, the fall armyworm (FAW), Spodoptera frugiperda is considered a potential threat to food security in Nigeria due to its devastating feeding pattern on maize and its wide host range. Its invasive and high dispersal nature enhances its spread from its first reported state (Oyo) in early 2016 to the entire 36 states of Nigeria by the year 2018. It accounts for averagely an estimated 34% or more yield reduction in Nigeria’s maize field, hence, a need for an efficient management approach. Although most farmers rely on the use of insecticide, it is found ineffective because of the inaccessible location of FAW in maize. This study was carried out to investigate the different management approaches adopted in Nigeria to control FAW and its impact on the insect pest population. Conventional measures such as planting improved seeds, avoidance of late planting, and polyculture to increase the natural enemy’s population have been used but with limited control of FAW. Maize lines with aflatoxin resistance or transgenic Bt-maize are found resistant to FAW. Botanicals such as neem extract lowered the percentage of leaf area damage, incidence of FAW larva infestation, and the number of larvae. It is difficult to curtail the menace of FAW through one control method, hence, the need for an integrated approach
        5.
        2020.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In this study, actual odor conditions were investigated in restaurants, livestock facilities, and major odor discharge facilities around daily life, and an odor modeling program was performed to find ways to improve odors in odor discharge facilities. The odor modeling results of restaurants around daily life showed that the complex odor concentration of large restaurants, which are close to residential areas, is higher than the acceptable complex odor standard at the receiving point. It was judged that a plan to increase the height of the restaurant odor outlets and a plan to reduce the amount of odor discharge was necessary. As a result of modeling the life odor of livestock housing facilities, when the distance from the housing facility is far away, the actual emission concentration is much lower than the acceptable emission concentration at the receiving point. It was judged that such facilities need to be reviewed for ways to reduce the emission of odorous substances, such as sealing the livestock housing facilities or improving the livestock environment. The main odor emission business sites that show complex odor concentration as 1,000 times or greater than the outlet odor emission standard were businesses associated with surfactant preparation, compounded feed manufacturing, textile dyeing processing, and waste disposal. Due to the separation distance and high exhaust gas flow rate, it was found that odor reduction measures are necessary. In this study, it was possible to present the allowable odor emission concentration at the discharge facilities such as restaurants, livestock houses, and industrial emission facilities by performing the process of verifying the discharge concentration of the actual discharge facility and the result of living odor modeling. It is believed that suitable odor management and prevention facilities can be operated.
        4,200원
        8.
        2017.10 구독 인증기관·개인회원 무료
        인삼은 내한성이 강하고 고온에 약해 여름 고온을 피할 수 있는 서늘한 기후조건을 가진 곳에서 주로 재배하며, 지 력 회복을 위하여 일정 기간 휴경 기간을 가지기도 하는 등 고유의 농업 체계를 가지고 있다. 햇빛을 가리기 위하여 차양막을 설치해 놓음에 따라 일반 경작지와는 다른 반음지 성 미기후가 형성되며, 이는 인삼밭에서 출현하는 식물상에 영향을 미칠 것으로 예상된다. 따라서 본 연구는 국내 대표 적인 인삼 재배지인 금산 인삼밭을 대상으로 인삼밭의 식물 상 특성을 파악하고 생물다양성 측면에서 인삼밭 관리방안 을 제시하고자 수행되었다. 금산은 1,500여 년의 역사동안 인삼을 재배해 온 국내 최대 인삼 유통지로 금산 인삼밭은 역사성, 생태성, 문화성, 고유성 등을 인정받아 2015년에 국가중요농업유산 제5호로 지정되었다. 인삼밭은 대부분 구릉지에 위치하고 있으나 현대에 이르러서는 평지에서 벼 와 함께 윤작하는 시스템도 운영되고 있다. 금산 인삼밭 식물상 조사는 2017년 5월 10일부터 12일까지 진행하였으며, 인삼 재배지 면적이 넓고 구릉지 인삼밭이 많이 남아있는 비구지골, 내장마을, 승재마을 위주로 조사하 였다. 식물상 조사는 토지이용유형에 따른 조사와 인삼밭 유형에 따른 조사로 구분하여 진행하였다. 금산 인삼밭은 산림, 인삼밭, 밭, 마을에 이르는 선형의 토지이용유형 구조를 보이며, 각 토지이용유형간 환경요인이 달라 출현 식물상에 차이가 있다. 따라서 인삼밭과 타 토지이용유형간에 출현 식물상을 비교하여 인삼밭만이 가지는 식물상 특성을 파악하 고자 하였다. 인삼밭 유형에 따른 식물상 조사는 비교적 최근 경작이 시작된 평지 인삼밭과 오랫동안 경작이 이루어진 경사지 인삼밭으로 구분하여 출현 식물상을 비교하였다. 조 사된 식물상을 바탕으로 생활형, 귀화율 분석을 진행하였고 토지이용유형간 출현식물상 유사도는 Sørensen(1948)의 유 사도 계수를 이용하여 분석하였다. 토지이용유형에 따른 식물상 조사 결과, 인삼밭은 주변 토지이용유형으로부터 많은 영향을 받는 것으로 파악되었 다. 차양막 설치, 인위적인 관리 등이 지속적으로 이루어져 많은 개체가 관찰되지는 않았지만 경사지 인삼밭에서는 주 변 산림에서 출현하는 신나무, 은사시나무 치수 등과 더불 어 밭에서 주로 출현하는 벼룩나물, 선개불알풀 등이 관찰 되었고, 평지 인삼밭에서는 밭에서 주로 출현하는 개갓냉 이, 왕고들빼기 등이 관찰되어 인삼밭 주변 토지이용유형으 로부터 종 이입이 주로 이루어짐을 확인하였다. 귀화율은 산림을 제외한 대부분의 토지이용유형에서 비슷한 수준으 로 높게 나타났는데 이는 지속적인 인위적 간섭이 있기 때 문인 것으로 파악되었다. 또한 토지이용유형간 유사도를 분 석한 결과, 경사지 및 평지는 모두 마을, 밭과 유사한 것으로 나타났다. 그러나 일반 경작지는 양지 환경인 반면, 인삼밭 은 반음지 환경 특성을 유지함에 따라 표주박이끼, 우산이 끼, 들솔이끼 등의 선태식물류가 높은 피도로 출현하고 있 었다. 선태식물은 생태계에 있어 하층식생을 점유하는 주요 구성요소이며 토양 퇴적을 촉진시킴에 따라 개척자 식물로 서도 중요한 역할을 수행하는 것으로 알려져 있다. 금산 인 삼밭은 이와 같은 선태식물류의 서식지 역할을 수행하고 있으며, 경사지 인삼밭에서는 토양 유실 방지에도 영향을 미칠 것으로 판단되었다. 인삼 재배 특성상 잡초 등의 이입 을 막기 위하여 고랑에 비닐을 씌운 곳이 있었는데 선태식 물류의 유전자원 및 생육지 보전을 고려한 관리가 이루어져 야 할 필요가 있다. 선태식물류는 인삼 재배를 위해하지 않 으며 토양 퇴적, 유지 등의 역할을 수행하고 있어 비닐을 덮지 않고 관리하는 것이 바람직할 것으로 예상된다.
        9.
        2017.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The study seeks to cooperate with the investigation of a fire investigation based on public-private partnership. Fire protection systems provide a wide variety of viewpoints from the perspectives of design, construction, management, maintenance, maintenance and maintenance systems at a particular point in time, construction, management, and maintenance systems. What is controversial is that there are illegal activities such as illegal activities of the Patent Office, misconduct of construction work and unreasonable construction of construction works.As a theoretical framework, the present study identified the four key elements of a successful disaster response system : responsiveness, control, professionalism, and bias.
        4,000원
        10.
        2017.04 구독 인증기관·개인회원 무료
        Increasing Lepidopteran pests such as Helicoverpa armigera are emerging pests of corn in Korea. They cause huge yield losses and deteriorate the quality of corn crop. We monitored the four major lepidopteran pests in major highland corn growing areas of Korea by employing sex pheromone trap during 2012 to 2015 for understanding those population dynamics. Among these species, H. armigera was found to be the main pest based on the damage intensity (80 ~ 90% of total damage). Some effective insecticides were selected such as Indoxacarb etc. Optimal timing of spraying was estimated at around 70 days after planting (earing season) to control H. armigera. Additional, two species of parasitoids (Therion circumflexum and Ophioninae sp.) was identified from H. armigera. However, more extensive survey for natural enemies is needed to set the natural enemy based control program.
        11.
        2016.11 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구는 동시출현단어(co-word) 분석을 이용하여 기술경영 분야의 연구 주제 네트워크를 구축하고, 핵심 연구 주제 및 연구 주제 간 상호연관관계를 도출한다. 동시출현 빈도수의 정규화를 통해 키워드 간 유사성을 도출하여 무방향 네트워크를 분석하는 기존연구들과는 달리 본 연구는 연관규칙분석(association rule)을 통해 키워드 간 신뢰도(confidence)를 도출하여 유방향 네트워크 분석을 수행한다. 2011~2014년 기술경영 분야 9 개 국제 학술지에 게재된 2,456개의 논문의 저자키워드를 대상으로 빈도수 상위 200개 키워드를 추출하고, 주제(THEME), 방법(METHOD), 분야(FIELD)의 세 가지 유형으로 키워드를 분류한다. 각 유형별 일원(one-mode) 네트워크를 구축하여, 함께 많이 연구가 이루어진키워드들을 찾아내고, 핵심 키워드를 도출한다. 또한 두 가지 유형의 키워드 간의 이원(two-mode) 네트워크를 구축하여, 연구 주제별로 함께 많이 활용된 방법 및 대상 분야를 탐색한다. 본 연구 결과는 최근 성숙기에 접어든 기술경영 분야의 연구 흐름 및 지식 구조를 키워드 수준에서 구체적으로 제시함으로써, 기술경영 분야 연구자들의 연구 주제 탐색 및 연구방향 설계에 활용될 수 있을 것으로 기대된다.
        6,400원
        12.
        2016.04 구독 인증기관·개인회원 무료
        This study was performed to apply and to utilize the digital forecasting information for Integrated Pest Management at pepper field in Chungbuk province. Chemical spray according to the forecasting prediction using FarmIPM and NCPMS were compare to the that of no control and conventional control. Pests such as Oriental tobacco budworm, Western flower thrips, and Cotton aphids were investigated the control effect by the forecasting modeling information at three pepper plots. Damaged fruit ratio (%) of Oriental tobacco budworm was ordered into no treatment (30) > forecasting (20) > conventional (12), but damages by other pest was insignificant. The frequency of forecasting control was ordered into NCPMS (31) > conventional control (17) > FarmIPM (8). Damaged fruit ratio (%) of Oriental tobacco budworm was ordered into no treatment (35.5) > NCPMS (26.1) > FarmIPM (24.6) > conventional (13.9). Density of western flower thrips was higher but had no problematic by the chemical control when it is hard to analyze the damage by cotton aphid occurrence. Damage by cotton aphids has no prediction of forecasting but done with 6th chemical spray, and their damage ratio (%) was ordered into no treatment (67.7) > FarmIPM (16.2) > NCPMS (11.3) > conventional treatment (4.8). At an analysis of economic value, gross profit was highest in FarmIPM and next to NCPMS > conventional control.
        13.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        The study conducted questionnaire analysis to 413 industrial safety field employees in order to examine the necessity and validity of industrial safety field's 17th neo-job classification based on National Competency standards(NCS). As a result, 50.1% of industrial safety management field and 43.3% of industrial health management field answered that classification details of occupational safety and health management field are classified by job(duty) performance. Industrial safety management field recognizes that management and engineering section play a significant role in their work, while industrial health management field recognizes worker's health care and work environment management and overall control of work environment assessment to be significant in their work. Furthermore, industrial safety management field recognizes that separating qualification and foundation of 'construction safety manager', 'chemicals(safety and health) manager', '(toxic)risk assessment evaluator or risk factor manager' to be highly significant. The study is meaningful in that it suggests industrial safety field's qualification items practical in industrial sites
        4,000원
        14.
        2014.04 구독 인증기관·개인회원 무료
        Materials are limited for pest control and chemical pesticides are prohibited in organic farming. Thus, the concept of pest control may not be effective for pest management in organic farm. As an alternative approach, landscape management is potentially effective and useful approach for preventing pathogen and insect pests in organic farm. It is needed to develop best practices utilizing functional biodiversity for pest management through landscape management. For this purpose, we investigated the effect of companion plants on species richness of insect pests and natural enemies in the field border area and in the crop plants (rice and soybean). In rice paddy fields, Lysimachiae foenum-graecum, Saururus chinensis were selected as effective companion plants on the paddy field levee for conserving Arachnidae as natural enemy and density suppression of insect pest such as Lissorphoptrus oryzophilus, Riptortus clavatus. As a result, damage rate of rice plant by insect pests was significantly lower (2.5%) and yield rate of healthy grains was significantly higher (8.7%) than control. In soybean fields, Marigold plants such as Tagetes patula, T. officinalis, increased Arthropod species richness and ratio of natural enemy group, and decreased ratio of insect pest group. As a result, yield (weight of 100 seeds) of healthy soybean was significantly increased (2.5%) than control. The 2nd infection rate from damage by R. clavatus was significantly lower in the treated plot than that in control. Thus, yield rates of healthy soybean in the control and the companion plant-treated plot were 79.0% and 84.3%, respectively, compared to conventional farming using chemical pesticides. Therefore, use of companion plants on field border was an effective practices for preventing pest insects and increasing yield in organic farming.
        15.
        2012.12 구독 인증기관 무료, 개인회원 유료
        This study show in the Social Work Field(focus on the welfare facilities) about Literature and Concept Definition on the 'Welfare Management' and 'Efficiency'. And, show a case to study for 'Management' and 'Efficiency' on the 'welfare facilities'. Also, this study try to find on the development of the Social Work Field through the 'Welfare Management' and 'Efficiency'. First, show the new concept on the 'Welfare Management'. Existing 'Welfare' and 'Management' have been using independently of each other in their field. but now, when use the 'Welfare Management' that a new word, define the word 'Welfare Management' and help to another researcher who study on the 'Welfare Management'. Second, show the exemplary case on the 'Welfare Management' and 'Efficiency' in welfare facilities. It arrange for exemplary and typical case in the various study case and basic information offer to the persons who try to study for 'Management' and 'Efficiency' in social work field. third, In the Social Work Fied, I try to find a way to vitalize and development that the study and practice on the 'Welfare Management' and 'Efficiency'. Exisiting 'Management' & 'Economy' treat the terms unprofessionally in the Social Work Field. Social Work Field must cope with quickly and correctly to the current of times like that unlimited competition & development, downfall of the traditional social safety net, economic crisis of a welfare state, etc., in immense framwork of a capitalistic society & a new liberalism. And changing paradigm of social welfare policy. In the end, this study try to find a way for more growth of the Social Work Field trough the 'Welfare Management' and 'Efficiency'. Keywords : Social Work Field(Social Welfare Facilities), Welfare Management, Efficiency
        8,300원
        16.
        2012.06 KCI 등재 구독 인증기관 무료, 개인회원 유료
        본 연구에서는 교량기초 말뚝의 부주면마찰력 시험을 통하여 연약지반에 타설된 강관말뚝의 부주면마찰력을 측정하였으며 장기적인 마찰응력의 관측시험을 통하여 경제적인 상부구조물 시공시기를 판단하였다. 본 연구의 결론은 다음과 같다. (1) 연약지반에서 부마착력의 크기는 침하속도가 클수록 크게 나타났다. (2) 마찰력의 관계 그래프에서 마찰응력의 증감이 없는 시기를 확인하여 상부구조물 시공시기를 판단할 수 있었다. (3) 말뚝정재하시험결과와 부주면마찰력 시험결과를 비교해 본 결과 항타 직후의 부주면마찰력은 재하시험 시의 마찰응력보다 크게 나오는 것으로 판단되며 15일 경과후의 측정값은 비슷하게 나오는 것으로 판단되었고, 이론식에 의한 결과와도 비슷하였다. (4) 부주면마찰력의 장기관측기법을 사용하면 부주면마찰력이 발생하고 있는 중이라도 적절한 상부구조물의 시공시기를 파악할 수 있어 경제적인 시공관리가 가능한 것으로 판단된다.
        4,000원
        17.
        2011.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        꼬마잠자리 서식지의 보전 및 복원을 위한 기초자료를 제공하기 위해, 2008년 6월부터 2011-7월까지 4년에 걸쳐 울산광역시 중구 다운동에 위치한 휴경지를 대상으로 서식지 변화와 휴경지 내에 서식하는 곤충상과 식물상을 조사하였다. 그 결과 곤충은 총 10목 32과 53종이 조사되었고, 잠자리목, 노린재목, 딱정벌레목이 총 18.9%로 우점하였다. 식물은 총 23목 30과 60종이 조사되었고, 사초과(13.3%)와 벼과(11.7%)가 우점하였다. 본 조사지역에는 목본 식물이 유입되면서 천이가 빠르게 진행되고 수생식물의 서식지를 잠식해 육지화되고 있다. 또한 이 지역에서의 식식성 곤충과 산지성 곤충이 증가하고 있다. 그 결과 꼬마잠자리의 서식지는 수심이 2.5~9.5cm로 일정하게 유지되고, 수면이 개방되어 있는 곳으로 이동되었다. 따라서 이 지역에서의 꼬마잠자리 서식지의 지속적인 보전과 유지를 위해서는 생태특성을 파악하여 장기적인 모니터링과 적절한 관리가 필요하다.
        4,200원
        18.
        2010.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Recently Korean enterprises that branch out into China have been continuously increased to achieve diverse objectives such as personnel expenses reduction, market share extension on China and globalization strategy implementation. We have studied about competitiveness reinforcement of enterprises that branch out into China in terms of TPM(Total Production Management). In this paper, we extended the concept of traditional TPM(Total Productive Maintenance) to TPM(Total Production Management) that covers extensively the concept of total management innovation activities. We explored detailed activities of TPM and voluntarily participative field research circle. Also, We suggested some prerequisite conditions for TPM settlement that might be recommended for the foreign companies in China and checked Key Performance Indicator(KPI) that could be useful to confirm how TPM contributed to enterprise competitiveness reinforcement.
        4,000원
        19.
        2009.12 KCI 등재 구독 인증기관 무료, 개인회원 유료
        This study was evaluated the indicators of GRI guideline LA6-LA9 for industrial safety sanitation field on 22 domestic sustainable management reports and 46 overseas reports published by companies in 2007 and 2008, was developed new indicators with emphasis on industrial safety sanitation act, and was assessed whether they are released. As a result, LA6(Percent of total workforce represented in formal joint management-work health and safety committees that help monitor and advise on occupational health and safety programs) was evaluated highest in release ratio on whether to release the reports by each indicator of industrial safety sanitation field using domestic sustainable management report GRI guideline, and in the case of overseas companies, it was evaluated that there is no companies that release all from LA6 through LA9 among GRI guideline, but it was grasped that the ratio of partial release is high. As for the release of indicators was developed with the use of industrial safety sanitation act of 22 domestic companies, the release of indicator No. 1(report and industrial disaster record) and 10(health diagnosis) of industrial safety sanitation act was high. This study is meaningful in that it analyzed the industrial safety sanitation field of sustainable management report(CSR) that has not been attempted so far with the use of new indicators developed with emphasis on GRI guideline and industrial safety sanitation act.
        4,000원
        20.
        2008.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        Road-map for the environmental friendly integrated pest management (IPM) of insect pests was drawn up on the strawberry vinyl-houses of farmer’s field. Major insect pests were occurred Tetranychus urticae and Aphis gossypii during the strawberry plant seeding in the vinyl house and open field. Also, same insect pests were occurred in the vinyl house during harvesting season of strawberry. For the control of T. urticae and A. gossypii, Phytoseiulus persimilis and Aphidius colemani as natural enemies were input to the vinyl house, respectively. However, because these natural enemies could not control insect pest populations, acaricide and insecticide were sprayed. Then natural enemies were input again in the vinyl house. Natural enemies could not endure the intense cold and differences of temperature and relative humidity between day and night during strawberry harvesting season. So, their behavior and control activity of pests were more decrease than pests. Firstly, natural enemies are input in the vinyl house during the early breeding season of strawberry, secondly, acaricides and insecticide are sprayed for the control of mites and aphids, respectively, during the middle breeding season in the hard winter. Finally, natural enemies are re-input in the vinyl house during the middle and late breeding season.
        4,600원
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