• 환경생물
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• 제39권4호
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• pp.486-494
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• 2021

수박은 저온에 민감한 작물로 10℃ 이하에서는 생육이 지연되거나 억제된다. 농가에서는 소득 향상을 위해 정식시기를 앞당기고 있으나 촉성재배 작형에서 안정적으로 수박을 생산하기 위해서는 가온 혹은 보온이 필수적이기 때문에 비용 및 노동력의 부담이 크다. 이에 따라 저온 피해를 경감시킬 수 있는 재배기술과 촉성재배용 수박 품종개발이 요구되고 있으며 본 연구는 재배기간 중 지속적인 야간 저온에 의한 수박의 생장 및 과실 비대 양상 변화를 조사하여 내냉성 수박 품종개발의 기초자료로 활용하고자 수행하였다. 지속적인 야간 저온과 적온 환경에서 내냉성을 보일 것이라 예측되는 품종과 저온에 감수성을 보일 것으로 예측되는 품종을 재배하고 생육을 비교하였다. 정식 후 생육 초기에는 내냉성을 보일 것으로 예측하였던 품종이 저온 조건에서 덩굴 길이의 감소율이 작았으며, 생체중과 건물중은 증가하였다. 그러나 교배기와 생육 후기에는 내냉성 품종 중 하나에서 감수성 품종보다 덩굴 길이, 엽장, 엽폭, 엽병길이의 생장이 억제되어 자원 간에도 생육단계에 따라 생장반응의 차이가 존재하는 것을 확인하였다. 과장, 과폭, 과중 또한 내냉성 품종에서 통계적으로 유의하게 생육량이 낮았으며 착과율도 감수성 품종에서 높은 값을 보였다. 이는 품종의 육성목표와 선발기준이 정식 후 생육초기의 내냉성에 있기 때문인 것으로 판단되며, 다양한 저온환경에 적응할 수 있는 품종을 개발하기 위해 유묘기부터 과실 비대기까지의 생육단계에 따른 내냉성에 대한 추가 연구가 필요하다.

• 경영과정보연구
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• 제10권
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• pp.67-93
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• 2002

The future social makes an multipule effort to secure native competition. It is very difficult to foresee the length and deepest on the future social coming soon than human beings has experienced until now. The future social will be adopt a positive attitude on lifelong education, also, because It will be rapidly change. Like this foundation knowledge economic will be secure which a knowledge is high value and build up a fortune. Now, new sight for education is necessary definitely to a person. In the future, labor viability is utterly dependent on what the lifelong educations ability is.

• 여성건강간호학회지
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• 제8권2호
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• pp.244-256
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• 2002

The purpose of this study was to examine the effects on labor pain and duration of delivery time for primipara women treated by San-Yin-Jiao(SP-6) and Hob-Gog(LI-4) acupressure. The design of this study was a nonequivalent control group non-synchronizedpost test only design. It was done to identify the effects of SP-6 acupressure or LI-4 acupressure on labor pain in primipara women. The benefits of using SP-6 acupressure or LI-4 acupressure were evaluated by comparing three groups, a SP-6 acupressure group, a LI-4 acupressure group and a control group, not treated with acupressure. The participants included 192 primiparas who underwent vaginal delivery, 72 primiparas in the control group, 71 in the SP-6 acupressure group and 49 in the LI-4 acupressure group. Data were collected using a structured questionnaire consisting of general characteristics, a subjective labor pain scale (Johnson, 1974), and measurement of duration of delivery time. The results of this study are summarized as follows : 1. Differences in the acupressure effect for SP-6 and LI-4 were analyzed using Scheffe's test which showed that differences in the control group vs the SP-6 group and the control group vs the LI-4 group were statistically significant (t=21.767, p<0.05; t=23.923, p<0.05), but the SP-6 group vs the LI-4 group showed no significant differences. 2. The duration of delivery time in the group which had SP-6 acupressure or LI-4 acupressure was shorter (400.77${\pm}$153.34; 379.10${\pm}$127.60) than in the control group (528.68${\pm}$239.08). Differences in the effects of acupressure with SP-6 and LI-4 were also analyzed by Scheffe's test. Control group vs SP-6 group and Control group vs LI-4 group were significantly different(t=127.91, p<0.05; t=149.58, p<0.05), but the SP-6 group vs the LI-4 group did not show any statistically significant difference (t=21.67). This study has shown that SP-6 and LI-4 acupressure were both effective in relation to labor pain and duration of delivery time for primiparas. But it is necessary to replicate the study with a larger number of participants to generalize of the results.

• 농업과학연구
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• 제45권4호
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• pp.839-845
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• 2018

As a solution to the rural shortage of labor, mechanization crop production is necessary, but in some cases, the mechanization can cause problems such as a decrease in products due to the expansion of the necessary moderate workspace. The purpose of this study was to compare the yields of pepper by the planting-density for the mechanization of pepper cultivation. Experiments were done with three planting-density levels of $900{\times}300mm^2$(A-T), $1200{\times}450mm^2$(B-T), and $1500{\times}600mm^2$(C-T). In the analysis of growth, the highest values in plant height and thickness and the number of branches were observed with the B-T. C-T showed the highest values in the number of green-pepper and red-pepper and weight of the green-pepper and red-pepper, followed by B-T and A-T. In the analysis of growth, it was concluded that the proportion of the pepper body to the total length increased as the planting-density decreased. C-T had the biggest maximum diameter of the body, followed by B-T and A-T. On the other hand, A-T had the biggest minimum diameter of the body, followed by B-T and C-T. It was judged that the larger the planting-density was, the shorter the length was and the thicker the form was. As a result of measuring the chromaticity, there was no significant statistical difference in quality. Based on the experiment results, the ranking in total yields was in the order of C-T, B-T, and A-T. The reduced planting-density seemed to increase the productivity, while the labor intensity and time were reduced due to the improvement of the working environment.

• Current Research on Agriculture and Life Sciences
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• 제21권
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• pp.23-29
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• 2003

Worldwide consumption of vegetable soybean bas been increasing recently, hence it is necessary to produce good quality of soybean in our farms. In the process of vegetable soybean production threshing and seperation work accounts for about 80% of overall labor. Therefore, developing of the vegetable soybean thresher is necessary to reduce the cost of labor. The purpose of this study is to acquire the basic informations to design of the vegetable soybeans-thresher. We make the experimental system which measure the physical properties and investigate the detachment forces. Also, We calculated the minimum speed of threshing cylinder. The result are as follows; 1. The average length of soybean stem is 68.2cm. 2. The length of soybean pods are seen as 61.3mm for 3 grain, 52.6mm fer 2 grains and 41.0mm fer 1 grain 3. The widths of soybean pods are seen as 14.1mm fer 3 grain, 13.8mm fer 2 grains and 13.4mm fer 1 grain. 4. The weights of soybean pods are seen as 4.1grams for 3 grains, 2.7grams for 2 grains and 1.4grams for 1 grain. 5. The average detachment forces of pods are seen as 1.5kgf for 3 grains, 1.2kgf for 2 grains and 0.8kgf for 1 grain respectively For 1 grain, the detachment force of pods ranges from 0.2kgf to 1.4kgf. For 2 grains, the minimum detachment force of pods is seen as 0.6kgf and the maximum one is seen as 2.5kgf. For 3 grains, the minimum detachment force of pods is seen as 0.7kgf and the maximum one is seen as 2.7kgf. 6. The minimum speed of threshing cylinder is shown 6.83m/s.

• Journal of Biosystems Engineering
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• 제37권2호
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• pp.122-129
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• 2012

Purpose: Recent mechatronics technology is the most appropriate high technology in agricultural applications to save repetitious labor. Method: Cow's body parameters were measured by several traditional measurers. Image processing technology was used to measure automatically their parameters to reduce labor and time. The parameters were measured form a small model cow which is easily measured, instead to a real cow. The image processing system designed and built for this project was composed of a PC, grabber card, and two cameras, which are located on the side and the top of the model cow. Tests of verification had measured 10 dairy cows. Result: Nine parameters of the model cow's body were measured, and the difference between the real data and the data by image processing was less than 16.7%. Based on the results of the research, the parameters of a real cow had measured of chest depth, withers height, Pelvic arch height, body length, slope body length, chest width, hip width, thurl width, and pin bone width were compared with image processing data. Conclusions: In the Demonstration test, Result had obtained similar data of cow model experiments, and the most of errors were shown less than 5% relatively good result.

• 수산해양기술연구
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• 제48권4호
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• pp.469-478
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• 2012

To manage, sort, and grade fishery resources, it is necessary to measure their morphometric characteristics. This labor-intensive task involves performing repetitive operations on land and on a research vessel. To reduce the amount of labor required, a vision-based automatic measurement system (VAMS) for the measurement of morphometric characteristics of flatfish, such as total length (TL), body width (BW), and body height (BH), has been developed as part of a database management system for fishery resources management. This system can also measure the mass (M) of flatfish. In the present study, we describe a morphological image processing algorithm for the measurement of certain characteristics of flatfish. This algorithm, which involves preprocessing, edge pattern matching, and edge point detection, is effective in cases where the flatfish being measured has a deformed tail and is randomly oriented. The satisfactory performance of the proposed algorithm is also demonstrated by means of experiments involving the measurement of the BW, TL and BH of a flatfish when it is straightened (BW : 117mm, TL : 329mm, BH : 24.5mm), when its tail is deformed, and when it is randomly oriented.

• Journal of Biosystems Engineering
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• 제42권3호
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• pp.227-233
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• 2017

Purpose: Morphological properties of soybean roots are important indicators of the vigor of the seed, which determines the survival rate of the seedlings grown. The current vigor test for soybean seeds is manual measurement with the human eye. This study describes an application of a machine vision technique for rapid measurement of soybean seed vigor to replace the time-consuming and labor-intensive conventional method. Methods: A CCD camera was used to obtain color images of seeds during germination. Image processing techniques were used to obtain root segmentation. The various morphological parameters, such as primary root length, total root length, total surface area, average diameter, and branching points of roots were calculated from a root skeleton image using a customized pixel-based image processing algorithm. Results: The measurement accuracy of the machine vision system ranged from 92.6% to 98.8%, with accuracies of 96.2% for primary root length and 96.4% for total root length, compared to manual measurement. The correlation coefficient for each measurement was 0.999 with a standard error of prediction of 1.16 mm for primary root length and 0.97 mm for total root length. Conclusions: The developed machine vision system showed good performance for the morphological measurement of soybean roots. This image analysis algorithm, combined with a simple color camera, can be used as an alternative to the conventional seed vigor test method.

• 한국약용작물학회지
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• 제13권6호
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• pp.268-272
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• 2005

백수오 지주설치 생력화를 목적으로, 무지주 처리방법을 달리하여 백수오 중국도입종을 재배하고, 이에 따른 생육, 근수량 및 경영비를 검토한 결과를 요약하면 다음과 같다. 1. 관행 지주재배시 무지주 재배에 비해 생육이 양호한 경향이었으며, 무지주 처리 간에는 주만장과 주경의 총만장은 무처리, 적심, 선단예취 순으로 긴 반면, 경태는 선단예취, 적심, 무처리 순으로 굵었다. 선단예취시 엽수는 가장 적었으나 잎이 크고 엽당 무게가 무거운 편으로 이는 덩굴의 선단부 예취로 인해 수광면적이 확대됨으로써 광합성능률이 향상된 것으로 판단된다. 2. 지근의 수와 주근태는 지주재배와 선단예취에서 다소 많거나 굵었고, 주근장과 지근태는 지주재배와 적심 처리에서 길거나 굵었다. 3. 10a당 생근수량은 관행 지주재배시 1,918kg에 비해 무지주 재배시 $17.9{\sim}22.6%$ 감수되었으나, 지주생력화로 생산비가 감소됨으로써 경영비가 절감되어 소득이 $8%{\sim}17%$ 증가되었다. 무지주 처리방법 간에는 무처리에 비해 선단예취시 생근수량은 6%, 소득은 8% 각각 높았다.

• Journal of Biosystems Engineering
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• 제36권4호
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• pp.252-256
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• 2011

Consumption of chicken feet has been increasing recently, thus it was necessary to produce good quality of bone less chicken feet. In the process of bone removal during chicken feet production, feeding, conveying, cutting and bone removing process takes about 90% of overall labor. Therefore, the development of a chicken feet-bone remover was necessary to reduce the cost of labor. There has been few research on the chicken feet bone removers so far in Korea as well as worldwide. So the main objective of this study was to develop a chicken feet-bone remover which is suitable for domestic circumstances. The average length of chicken feet was 113.3 mm with maximum and minimum lengths of 135.8 mm and 92.2 mm, and the average diameter of chicken leg was 12.5 mm, average width of the toe was 56.2 mm and the average weight of chicken feet was 26.4 g with maximum and minimum weight of 39.3 g and 16.9 g, respectively. Also, the average moisture content was 64.7% (w.b). The average cutting force of little toes was 15.6 N for the size ranges of less than 3.5 mm, 22.5 N, 3.5~6.0 mm and 30.3 N for larger than 6.0 mm in diameter, respectively.