• 국제지역연구
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• 제15권3호
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• pp.307-324
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• 2011

세계 각국은 침체에 빠진 경제를 재건해야 하는 동시에 지구온난화로 촉발된 환경문제까지 고려해야 하는 상황에 놓였다. 이 같은 상황에서 기존의 다양한 선행 연구는 생산증가와 환경보호를 동시에 수용하는 녹색 생산성을 정확하게 분석하지 못한다는 문제를 가지고 있다. 이러한 한계를 극복하기 위해 본 논문에서는 녹색 생산성이라는 새로운 개념을 제시하고 그 도출 방법을 체계화하였다. 뿐만 아니라 녹색생산성에 대한 영향을 미치는 결정적 정책변수를 파악하기 위해 1단계 DEA 분석을 통한 생산성 지수를 비교하고, 이에 기초하여 2단계 붓트렙 회귀분석을 실시하여 그 결정요인을 분석하였다. 1단계 실증분석의 결과, 미국, 일본, 유럽연합에 비해 한국의 녹색 생산성 지표는 크게 미흡한 것으로 나타났으며, 그 원인을 찾기 위한 2단계의 회귀분석 결과, 국가총생산, 에너지집약도, 탄소집약도, 자본집약도, 노동집약도의 변수가 정부의 환경오염 감축 노력보다 중요한 것으로 나타났고, 이를 위해 요소투입형 생산구조에서 요소의 질적 고도화가 필요함을 지적하였다.

• Journal of Ginseng Research
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• 제46권4호
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• pp.543-549
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• 2022

Background: In physical activity or labor, the human body is in a state of high intensity stress, and all parts or physiological functions of the body respond positively to maintain or balance the need for movement. The human body has many physiological changes in the process of movement, and fatigue is the external manifestation of various complex changes inside the human body. Fatigue is also a physiological mechanism of self-protection after the body reaches a certain level of activity, which can prevent the occurrence of life-threatening excessive functional failure. The generation of fatigue is a very complex process, and its mechanism has not been concluded yet. Therefore, it is an important work to search and screen the effective components of natural plants that have anti-fatigue effect and to explore their mechanism. Methods: This was a 8-week, randomized, double-blind, placebo-controlled clinical trial. A total of 110 subjects who passed physical examination were included according to the scheme design, and randomly divided into a test group which was given KRG and a placebo control group. The calculation is carried out according to the standard of sub-high-intensity exercise test. Results: There was no adverse effect on safety index of subjects after taking red ginseng capsule. After KRG treatment, subjective strength grade is significant lower than placebo treatment. Blood lactic acid content is significantly get lower after trial in KRG group, and significant lower than placebo group. Creatine phosphokinase(CK) content is significantly get lower after trial in KRG group, and significant lower than placebo group. Conclusion: According to the criterion in the test scheme, the result shows that KRG is helpful on relieving physical fatigue.

• 한국산학기술학회논문지
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• 제21권11호
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• pp.254-263
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• 2020

이 연구는 농촌진흥청의 전주기 경제성 분석단계 중 사후 경제성 분석단계에서 활용할 수 있는 농가의 신기술 수용요인을 지표화하고 중요도를 평가하기 위해 수행되었다. 선행연구 및 전문가 자문을 거쳐 농촌진흥청의 영농기술을 유형화하였으며, 전문가 델파이 조사를 통해 농가의 신기술 수용요인을 지표화하고 중요도를 평가하였다. 평가지표는 2계층으로 구분한 다음, 계층분석 방법(AHP)을 이용하여 중요도를 평가하였다. 중요도 평가결과, 1계층에서는 재무 수익성 43.9%, 기술성 23.6%, 노동환경 22.4%, 연관산업 및 기술지원체계 10.1%의 중요도를 보였으며, 2계층에서는 기술성의 경우 기술습득의 용이성 64.9%, 기술의 완성도 35.1%, 노동환경의 경우 노동강도 53.7%, 작업위험도 26.7%, 노동시간 19.6%, 재무 수익성의 경우 농가소득 증가수준 69.9%, 신규자금 소요수준 30.1%, 연관산업 및 기술지원체계의 경우 교육 및 기술지원체계 66.3%, 연관산업 활성화 정도 33.7%로 분석되었다. 이 연구는 영농활용기술의 농가 수용성을 높이고, 농업 연구 및 지도의 효율성과 효과성을 높일 수 있을 것으로 기대된다.

• 한국콘텐츠학회논문지
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• 제16권11호
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• pp.321-329
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• 2016

본 연구는 금융위기 이후 새로운 질서로 부상되고 있는 뉴 노멀 시대 하 한국경제의 R&D투자가 생산성 성장에 미치는 효과를 분석하였다. 이를 위해 R&D자본 및 기타자본의 집약도 및 총요소생산성이 노동생산성에 미치는 효과를 전 기간(1970~2014), IMF외환위기 이전 까지 기간 (1970~1997), 그리고 그 이후 기간(1999~2014)로 구분하여 추정하였다. 그 결과 R&D자본과 기타자본의 집약도 변화율 모두 노동생산성 변화에 매우 높은 유의성을 보였으며, 특히, 이들 변수 모두 IMF외환위기 이전의 계수보다 외환위기 이후 기간의 추정계수가 더 높게 나타났다. 또한 연구개발투자의 한계생산성이 총요소생산성 성장에 미치는 영향을 역시 3개 기간으로 나누어 추정하였다. 결과 전 기간 모두 연구개발투자의 한계생산성은 통계적으로 유의성이 높게 나타났으며 또한 외환위기 이후의 한계생산성 계수(0.3873)가 전기의 기간보다 높게(0.2243) 나타났다. 이 같은 결과는 IMF 외환위기 이후 한국경제에 있어서 R&D 투자의 증가가 총요소생산성 성장에 더 긍정적으로 작용해 오고 있음을 의미한다고 할 수 있다.

• 한국콘텐츠학회논문지
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• 제21권3호
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• pp.184-193
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• 2021

본 연구는 우리나라 16개 지역을 대상으로 기술혁신활동과 그 경제적 성과를 분석하였다. 실증분석은 과학기술정책연구원의 서베이 data를 이용하였고, 분석모형은 R&D지출과 매출액에 대한 단순모형 I과 노동변수를 추가한 Cobb-Douglas 모형 II로 분석하였다. 분석결과 모형 I은 전국을 대상으로 한 분석에서는 R&D 지출에 대한 매출액 탄력성이 0.42로 추정되었으며, 지역별로 보면 울산이 0.66으로 최고치를 보인 반면 부산지역은 0.2로 최저치를 보여주고 있다. 모형 II에서는 R&D 지출의 통계적 유의성이 약하고 상대적으로 노동의 통계적 유의성은 높게 나타나고 있는데, 이는 기술투자가 경제적 성과로 나타나는 데에 불확실성이 보다 강하게 존재하기 때문으로 보인다. 이를 보완하기 위해 분산분석을 통해 동질적인 지역을 대상으로 3개 권역으로 구분하였는데, Group A는 상대적으로 규모가 작고 높은 R&D집약도를 보이고 있으며, Group C는 규모가 큰반면 낮은 R&D집약도를 보이고 있다. 분석 결과는 모형 I에서 매출액에 대한 R&D 탄력성은 Group C가 0.48로서 가장 높게 나타나고 있고, Group B는 0.38, Group A는 0.29로서 권역별 차이가 뚜렷하게 나타났다. 모형 II에서는 매출액에 대한 R&D 탄력성은 Group C가 0.088로서 가장 높고, Group B는 0.086, Group A는 0.031의 순으로 나타났다. 노동 탄력성은 Group A가 1.16으로 가장 높고, Group C가 1.13, Group B는 1.10순으로 나타나고 있는데, 이는 중소기업이 다수인 지역에서 매출액에 대한 R&D 탄력성보다는 노동탄력성이 크게 나타나고 있음을 보여주고 있다.

• Journal of Construction Engineering and Project Management
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• 제4권1호
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• pp.1-7
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• 2014

The Sudanese construction sector is characterized by many small and large projects and high labor intensity, and accounted for 3.2% of the Sudanese country's GDP. The basic problems facing the Sudanese construction projects are the factors that affect on construction project performance. The objectives include identifying the factors affecting the performance of Sudanese construction projects, and to determine the critical factors. The literature review has been done to gather the information about the causes and their factors that affect on the performance of construction projects from the previous researches. The research methodology was conducted to gather the data by questionnaire which was examined to be reliable and valid according to statistical tests. The (34) factors were identified as factors affect on construction projects and the (10) factors were the critical factors which may lead to poor performance of Sudanese construction projects. This study has some conclusions such as the instrument for measuring the critical factors on the performance is reliable and valid, so the project management stage performance is 64.2%.

• Journal of Biosystems Engineering
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• 제35권1호
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• pp.31-36
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• 2010

A small unmanned helicopter was suggested to replace the conventional spray system. Aerial application using an agricultural helicopter helps precise and timely spraying, and reduces labor intensity and environmental pollution. In this research, a rotor system (SW05) was developed and its lift capability was evaluated. Lift force for the dead weight of the helicopter was obtained at the grip pitch angle of $12^{\circ}$. As the pitch angle increased to $14^{\circ}$ and $16^{\circ}$, the payload increased to 176 N and 216 N, respectively. Compared with SW04 airfoil performance in the total lift, the SW05 airfoil showed nearly the same capacity, but the payload of the SW05 was reduced because of the increased dead weight. A rated flight condition was defined as lifting mean payload of 294 N with the grip pitch angles of $16{\sim}17^{\circ}$ at the rotor rotating speed of 850~950 rpm for the adjusted engine power. The fuel consumption would be 4.8~6.0 L/hr, and the air temperature of cooling fan should be kept below $160^{\circ}C$.

• Journal of Biosystems Engineering
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• 제31권2호
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• pp.102-107
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• 2006

Opening agricultural market progresses radically, reducing cost of high quality agricultural products becomes urgent. Aerial application using an agricultural helicopter helps precise and timely spraying and reduces labor intensity and pollution. The development of an agricultural helicopter was necessary for taking advantages of both technique and economy. In this study, as the first stage of developing an unmanned helicopter capable of 20kg payload, an engine was selected and a prototype transmission was designed for an agricultural helicopter. Prony type dynamo-meter was constructed, the engine was tested and then performance curve was obtained. The centrifugal clutch was engaged at the rotation speed of 3,500-4,000 rpm. Maximum power was expected at the engine speed of 5,900-6,200 rpm when adjusted at the optimal output. Based on the test results, the transmission was designed for driving main rotor shaft.

• Journal of Biosystems Engineering
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• 제19권2호
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• pp.91-98
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• 1994

Planting, transplanting, and harvesting are important processes for the successful production of farm products in Korea because those require the high labor intensity during limitted period. Recently, many researches of using automatic control with a microcomputer are carried in the agricultural field, but are not much spread to the seeder development. Automatic sowing technology would be much attractive if there was a way to assure that each seed was count accurately in the seed metering device. Thus, an automatic seed metering device was designed and constructed to be controlled by microcomputer. This device could be improved in not only counting the number of seeds in but also sowing seeds between row spacings. Automatic seed metering device consisted of conveyor belt and temporary storage device. Performance of seed metering device depends on the apparatus including sensor, stepping motor and DC-solenoid. Research contents and results are summarized as follows. 1. The seed metering device involving seed hopper, sorter and temporary storage device was designed and constructed. 2. A seed counting system with six photo electric sensors, designed and built for this project, was adequate for tranferring and counting seeds accurately. 3. Operating algorithm for stepping motor and photo electric DC-solenoid was developed. The Seed metering device proved to be a smooth and accurate operating device using the algorithm. 4. The performance of second prototype metering device was examined with five kinds of seeds ; mung beans, red beans, white beans, black beans and corn to transfer and count the seeds. The error ratio of seed metering was less than 3.5%.

• 대한인간공학회지
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• 제28권3호
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• pp.7-15
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• 2009

The objective of this study is to survey the working environmental conditions and musculoskeletal workload(DMQ) in red pepper farmers. 155 full-time farmers(males=91, females=64) lived in Chungnam and Jeonbuk participated in the study. To offer the fundamental data for agricultural improvement of red pepper farms, information about working farm conditions, health condition, musculoskeletal disorders(MSDs), labor intensity and musculoskeletal workload was obtained by questionnaire and interviews. The results are as follows: 1. The farmers reported sunlights, high temperature and cold/ draught as uncomfortable work environment. 2. Physical and mental fatigue in females is higher than that of males. 3. The prevalence rates of medical diagnosed diseases are higher in order of osteoarthritis, herniated nucleus pulposus(HNP), and chronic gastritis/gastric ulcer. 4. Prevalence rates of musculoskeletal symptoms more than standard 1 among the various pain areas are higher in order of low back, shoulders and knees. These results can be used practically for agricultural improvement of red pepper farms to prevent MSDs.