• 한국동물위생학회지
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• 제41권2호
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• pp.63-69
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• 2018

This study was conducted to evaluate the effect of tuberculin test and associated various environmental factors on the quantity and quality of milk production of daily cows. The change of milk quantity followed to tuberculin test was investigated on 109 daily farms in south Gyeonggi, and the change of milk quality was also studied on 48 daily farms. The result of this study showed that the quantity and quality of milk production was decreased after tuberculin test (P<0.05). The amount of loss of the milk production due to tuberculin test was, however, only 0.92 L per cow. In terms of milk quality, the level of total protein was statistically significantly decreased. This study also showed that the milk quality was further decreased when the cows were restraint after veterinarians arrived compared to the case that cows were stayed restraint before the veterinarians visited the farm. In addition, milk quality and quantity were lowered worse when relative humidity of the location of tuberculin test was lower than 50% or higher than 70%, or when the milk production of a farm is higher than its quarter. This study showed that stress on daily cows and the farmers induces the decrease of milk yield and milk quality, and these losses can be minimized by regulating various environmental factors to the direction to maximize productivity.

• 유기물자원화
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• 제17권4호
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• pp.91-102
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• 2009

본 연구에서는 축산자원화물을 농지에 주입 시 유출 및 침출에 의하여 삭감되는 축분자원화물의 전환율을 산정하고자 실험실 시험을 실시하여 조사 및 분석하였으며 결과는 다음과 같다. 강우강도의 증가에 따라 농지로부터 유출유량도 증가하는 경향을 보였다. 침투수의 유량은 강우강도 20mm/hr 미만에서는 강우의 대부분이 지하로 침투하였으며, 32.4mm/hr 이상의 강우강도에서는 5.0L로서 거의 유사하거나, 다소 감소하는 경향을 보였다. 토양의 구성성분과 다짐의 정도가 유사할 경우 표면유출은 강우강도의 크기에 의존함을 알 수 있었다. 액비를 시비한 경우, 표면유출수의 유량은 퇴비를 시비한 반응조와 거의 유사하였으며, 침투수의 유량은 퇴비 시비시보다 작게 나타났다. 오염물질의 항목에 따른 농지유출비는 BOD가 0.00003, $COD_{cr}$은 0.00006, TN은 0.00056, TP는 0.00011, 그리고 TOC는 0.00005로서 항목에 따라 다소 차이가 있었다. 특히, TN 유출비는 타 항목에 비하여 10배 이상의 높은 값을 보였다. 한편, SS의 경우 농지유출비는 0.001로 매우 높게 나타났는데, 이는 시비된 오염물질의 유출이라기보다는 토양자체의 미세한 콜로이드성 입자의 유출에 기인하는 것으로 판단된다. 32.4~57.1mm/hr의 모든 강우강도를 고려할 때, 자원화물이 농지에서 삭감되는 농지 삭감비는 BOD의 경우 퇴비는 94.9~98.4%, 액비는 85.8~98.1%의 높은 범위를 보였다. TN은 퇴비의 경우 96.6~98.4%의 범위를 보였으며, 액비의 농지 삭감율은 97.2~98.5%의 범위로서 대부분의 자원화물이 농지에서 삭감되는 것으로 조사되었다.

• 한국의류학회지
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• 제29권8호
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• pp.1176-1187
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• 2005

The purpose of this study was to evaluate the efficiency of cooling vests developed for farm workers harvesting red pepper in summer. The study was performed using the following two steps: 1) Climatic chamber test, 2) Field test. For the chamber test, a work environment was simulated as $33^{\circ}C$ and $65\%$RH, and the thermo-physiological and subjective responses were measured with and without cooling vests. Twelve young males participated as subjects. For the field test, three farmers participated while harvesting red pepper on the form, in summer. The measurements used were same as in the chamber test. Subjects were tested without any cooling vests, as a control. They were tested wearing vests with 2 frozen gel packs (CV2: Cooling area, $308cm^2$), and vests with 4 frozen gel packs (CV4: Sooting area, $616cm^2$). As a result of the chamber test, rectal temperature($T_{re}$) and mean skin temperature( $T_{sk}$) were lower in both CVs than in Control, and this tendency was statistically significant in CV4 (p<.05). Clothing microclimate temperature ($T_{clo}$) and total sweat rate (TSR) were significantly lower when wearing cooling vests (p<.05) Heart rate (HR) was also lower in wearing cooling vests than in Control, and the speed of recovery to the comfort level was faster when the subjects wore cooling vests. In addition, subjects felt 'less hot, less humid, and less uncomfortable' in both CVs than in Control. Field tests showed a similar tendency with the chamber tests. In particular, wearing the cooling vest was effective in restraining the raise of $T_{clo}$ on the back. It can be concluded that the cooling vest was effective in alleviating heat strain and discomfort in both the chamber test and the field test, despite the cooling area of the cooling vest being just $3.4\%$ of the body surface area ($616cm^2$).

• 한국축산시설환경학회지
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• 제8권2호
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• pp.63-72
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• 2002

In Korea, a need of automatic dairy farm management system has been increased to lower production cost and to strengthen international competition. However, the present management system was mostly relied on foreign technologies and caused some problems in post management and after-sales services. Therefore, though there is a problem of price and quality at present, domestic technologies of the management system should be developed for the long run. This study was conducted to develop an electronic identification unit for an automatic dairy farm management system. The developed system was consisted of a tag, a reader, a switching circuit, and a personal computer. The tag attachable to each individual cow was developed to transmit individual radio frequency(RF) code into the air with modulation of ASK(amplitude shift keying). And the switching circuit was added to avoid confusion on reception and transmittance. The reader attached to a feeding device was developed to transmit activating signal periodically and to identify code of the individual tag when the tag was approached to the device. The reader was consisted of an active filter, a detecter, a comparator and a microcontroller. The test result was feasible enough to apply it for the automatic farm management system and the identified maximum distance was about 37cm.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.283-284
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• 2021

국내외 IoT(Internet of Things) 기반의 자동화 산업이 눈부시게 발전하고 있으며, 이러한 자동화 기술의 발전은 센서기술의 발전으로 더욱 가속화되고 있다. 최근에는 다양한 센서기술을 토대로 작물 재배를 목적으로 하는 스마트팜 산업이 급속하게 발전하고 있다. 스마트팜의 경우 작물 재배에 필요한 온도, 습도, CO2 등과 같은 대표적인 환경데이터를 계측하여 실시간 모니터링 및 모바일 서비스까지 제공하고 있다. 이러한 환경 모니터링 및 제어 동작의 대부분은 RS-485 기반의 모드버스(RTU) 통신방식을 활용하고 있다. 본 논문에서는 스마트팜 구축에 필요한 센서 데이터 및 액추에이터 정보를 IoT 표준 프로토콜인 MQTT(Message Queuing Telemetry Transport)를 사용하여 센서 데이터 및 액추에이터의 제어 동작을 LabView를 기반으로 플랫폼을 구축하여 성능을 테스트하고자 한다.

• 한국균학회지
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• 제50권1호
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• pp.61-64
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• 2022

In July and September 2020, a severe outbreak of stem rot was observed on bonnet bellflower (Codonopsis lanceolata) plants in a farm located in Chuncheon, Gangwon Province, Korea. The symptoms initially appeared on the stem at or above the soil line. Later, the infected stem completely rotted and blighted. The incidence of diseased plants in the field was 2-30%. Ten isolates of Rhizoctonia sp. were obtained from the stem lesions of diseased plants. All isolates were identified as Rhizoctonia solani AG-4 based on the morphological characteristics and anastomosis test. Three isolates of R. solani AG-4 were tested for pathogenicity on bonnet bellflower plants through artificial inoculation. All tested isolates induced stem rot symptoms on the inoculated plants. The symptoms were similar to those observed in plants from the farm. This is the first report of R. solani AG-4 causing stem rot in bonnet bellflower.

• 한국정보전자통신기술학회논문지
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• 제12권6호
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• pp.672-680
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• 2019

본 논문은 농장의 바이오 센서 데이터를 수집해서 농장에서 재배중인 농작물의 질병을 진단하고, 그 해 수확량을 예측하는 IoT 및 딥 러닝 기반 스마트 팜 환경 최적화 및 수확량 예측 플랫폼을 제안한다. 이 플랫폼은 현재 날씨, 토양 미생물 등 수집 가능한 모든 정보를 수집하여 작물이 잘 성장할 수 있도록 농장 환경을 최적화하고, 농장에서 재배중인 작물의 잎을 이용하여 작물의 질병을 진단하고, 그리고, 농장의 모든 정보를 사용하여 올해 수확량을 예측한다. 실험 결과 AEOM(Agricultural Environment Optimization Module)의 평균 정확도는 RF(Random Forest)보다 약 15%, GBD(Gradient Boosting Tree)보다 약 8% 높고, 데이터가 증가해도 RF나 GBD에 비해 정확도가 덜 감소한다. 선형 회귀에 따르면 정확도의 기울기는 ReLU의 경우 -3.641E-4, Sigmoid의 경우 -4.0710E-4, 계단함수의 경우 -7.4534E-4이다. 따라서 ReLU 사용시 정확도 기울기가 가장 낮으므로 테스트 데이터의 양이 증가함에 따라 ReLU는 다른 두 가지 활성화 기능보다 더 정확하다. 본 논문에서 제안한 EOYPP는 농장 전체를 관리하는 플랫폼으로 실제 농장에 도입된다면 국내 스마트 팜의 발전에 크게 이바지할 것이다.

• 농촌계획
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• 제8권1호
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• pp.94-104
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• 2002

In spite of the importance of the farm area in Seoul, in providing fresh vegetables, a pleasant environment and a good quality of life for residents, rapid urbanization and industrialization have greatly reduced the farm area. The purpose of this study is to examine farmers' intentions and attitudes to provide supporting data for planning the strategy of urban agricultural development. All the collected data was analyzed using the contingency tables and the Chi-square test using the SAS computer statistical package. Based on analysis of the survey data, the leaseholders were found to be more satisfied with their job than the landowning farmers. Also, the small-scale farmers with green houses showed greater job satisfaction than the ordinary large-scale farmers. Farmers' views on the farming in Seoul were different depending on their status. Therefore, agricultural strategies in there should be considered their different attitudes.

• 한국동물위생학회지
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• 제38권1호
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• pp.19-23
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• 2015

This study was carried out to investigate the genital tract bacterial flora of riding mare in Jangsu stud farm during March to September, 2014. The specimens were collected from vaginal and uterus using a swab from 104 riding mares. Colonies were selected on blood and MacConkey agar plates, and identified as standard biochemical properties and Maldi-Tof MS. From this study, we isolated 148 strains including Escherichia (E.) coli (14.19%), Streptococcus (S.) equi subsp. zooepidemicus (2.7%), Streptococcus (S.) dysgalactiae subsp. equisimilis (2.03%), Klebsiella (K.) pneumonia (1.35%) and other strains from riding mares. In antimicrobial agents susceptibility test, it showed a high sensibility to the antibiotics of the most. E. coli and S. zooepidemicus were visible to have a high sensibility to almost antibiotics used in this study. However, K. pnemoniae showed a high antibiotic resistance patterns. These results may provide the basic information to establish strategies for the treatment and prevention of reproductive diseases in riding mares in Korea.

• 한국농공학회지
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• 제43권3호
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• pp.77-84
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• 2001

A few study has been performed on the durability of subbase treated with geo-cement for the farm road although many papers for the road treated with soil-cement were published. The objectives of the study are to develop the stabilizing method of subbase using additives of cement groups and 2nd additives such as gypsum and MgO, etc. A series of test was performed to investigate possible mixing ratios with geo-cement A, B, C, D and 2nd additives on the various soft soils from the rice paddy. Based on test results, durability index was greatly affected by geo-cement D which was mainly composed with gypsum. Compressive strength of clayey soil such as Soil I was less than threshold strength(30kgf/$\textrm{cm}^2$) but the strength was increased as addition of gypsum and MgO. It is recommended that geo-cement for soil stabilization has to be carefully chosen because strength characteristics of subbase are varied not only with soils but also with addition of geo-cement and 2nd additives. The developed method in this study can be used subbase treatment of low-cost agricultural roads.