• 한국작물학회지
• /
• 제41권2호
• /
• pp.250-256
• /
• 1996

104ha의 대규모 기계화 벼농장을 대상으로 생산비를 실증적으로 분석하여 앞으로 우리나라 벼농사가 국제 경쟁력을 갖추기 위해 지향해야 할 대규모 기계화 벼 재배기술 확립에 기여코자 하였다. 1994년 1년간의 경영실적을 주로 조사하여 얻어진 결론은 다음과 같다. 1. 종묘비는 52천원/ha, 비료비는 128천원/ha, 농약비는 176천원 /ha로 나타났다. 2. 영농광열비는 ha당 161천원으로 한국농가평균 1.3천원, 미국 세클라멘트지역 64천원, 뷰터지역의 128천원보다 높게 나타났다. 이는 조사농장의 장비유지비용이 높음을 뜻하는 것으로 생각되었다. 3. 노력비는 ha당 270천원으로 미국 세클라멘트지역의 101천원, 뷰터지역의 94천원보다 높았다. 이는 잦은 농기계 고장과 비료, 농약시용 및 수확시의 인력 투입에 따른 결과로 보여졌다. 4. 노력시간은 ha당 108시간으로 우리나라 수도작 농가평균보다 76% 감소되 었다. 5. 쌀 직접생산비는 1,092천원(100)으로서, 우리나라 농가평균 2,067천원(189)보다는 낮고, 미국 세클라멘 트지역 717천원(66), 뷰터지역 845천원(77)보다는 높았다. 체계적인 인력관리와 효율적인 기계작업이 이루어진다면 직접 생산비는 10∼15%정도 더 절감될 수 있을 것으로 보이며, 도정과 유통과정에서의 비용절감 가능성까지 감안한다면 쌀 생산비는 경쟁상대국에 접근될 수 있을 것으로 판단되었다. 6. 따라서 100ha정도의 규모에서 생산기반을 정비하고 인력과 농기계 관리를 효율화하고 농자재 투입을 최소화하며 예방중심의 방제를 하면 쌀 직접생산비로 본 국제경쟁력은 비관적이지 않은 것으로 판단되었다.

• 한국산학기술학회논문지
• /
• 제21권12호
• /
• pp.524-535
• /
• 2020

본 연구는 국내 아열대 작물의 재배동향을 분석하여 주산지를 도출하고, 정책지원 및 후속 연구의 기초자료를 제시하였다. 분석결과, 망고를 제외한 나머지 아열대 작물의 재배면적은 정체 또는 감소세를 보였다. 망고와 용과의 주산지는 제주도, 파파야는 경상남도, 강황은 전라남도에 재배면적이 집중된 것으로 나타났다. 구아바와 여주는 재배면적과 농가수가 미미하여 주산지의 정의가 어렵고, 아열대 채소인 여주와 강황은 상위 재배면적을 차지한 시군의 분포가 넓은 것으로 나타났다. 모든 작물에서 상위 10개 지역의 재배면적 비중이 높게 나타났으나, 상위 10위권을 매년 유지한 지역은 절반에 그쳤다. 이는 아열대 작물의 도입과 포기, 재배면적의 확대와 축소가 빈번함을 의미한다. 아열대 작물의 보급과 확대는 향후 기후변화에 대한 농업 부문의 선제대응과 농가 신소득 창출의 측면에서 당위성을 가진다. 정부와 농촌진흥기관은 상위 재배면적이 유지되는 지역을 중심으로 재배기술을 정립하고, 재배면적이 축소되는 지역의 기술적 원인을 규명할 필요가 있다. 또한 농가경영 컨설팅을 위한 기초자료의 구축, 지역별 생육 여건을 고려한 맞춤형 재배기술 개발에 연구지원을 확대할 필요가 있다.

• 대한수의학회지
• /
• 제35권1호
• /
• pp.137-142
• /
• 1995

Anaplasmosis is a tick-borne disease of large and small ruminants, causing losses through mortality, abortion, weight loss and reduced milk production. In one dairy farm, for example, 250 of a total of 800 imported goats were diagnosed with a mysterious type of anemia during the summer and autumn of 1992. The etiologic agent was identified as Anaplasma spp by acridine orange and ultrastructure by electron microscopy. In order to monitor variations in blood biochemical and hematological parameters associated with the disease, blood samples were collected by jugular venipuncture from 50 goats at 3 month intervals between the period of February and October, 1993. The levels of RBCs, HB and HCT decreased from $18.48{\pm}1.96$ to $13.47{\pm}2.48X10^6/mm^3$, $12.25{\pm}1.41$ to $9.54{\pm}1.77g/dl$, and $43.09{\pm}4.75$ to $30.93{\pm}5.78%$, respectively. The values of MCH(Mean corpuscular hemoglobin), MCHC(Mean corpuscular hemoglobin concentration) and PLT(Platelet) were elevated from $6.58{\pm}0.30$ to $7.05{\pm}0.47pg$, $28.40{\pm}1.20$ to $30.82{\pm}1.85g/dl$ and $1688.34{\pm}750$ to $2046.82{\pm}783X10^3/mm^3$, respectively. Percent parasitized erythrocytes(PPE) increased from $0.61{\pm}0.5$ to $2.22{\pm}1.9%$, clinical biochemical parameters aspartate aminotransferase and alanine aminotransferase were $66.64{\pm}23.1K.U$ and $14.90{\pm}6.59K.U$, respectively and persisted at high levels throughout the observation period. The level of albumin(2.46)0.52 g/dl) was decreased corresponding to an elevated globulin and a reduced albumin/globulin ratio in October as compared with the values in February. It is concluded that caprine anaplasmosis may be an important cause of anemia and hepatic malfunction in goats.

• 한국융합학회논문지
• /
• 제9권11호
• /
• pp.91-97
• /
• 2018

식물공장은 센서네트워크를 비롯한 U-IT 기술이 접목된 미래 농업기술 중 하나로서 기존 온실재배 기술의 한계인 외부 환경적 요인의 영향을 최소화 할 수 있는 장점을 갖고 있다. 식물공장의 자동화된 재배 시스템은 작물 재배에 대한 편의 제공이라는 단순한 범위을 벗어나 식물공장에서 취득된 정보을 기반으로 하는 지식베이스의 구축과 이를 활용한 교육, 기타 응용 서비스 개발이 가능한 플랫폼으로서의 확장성을 제공한다. 본 논문에서는 식물공장의 서비스 확장을 위하여 식물공장 간 작물생육과 연관된 정보의 효율적 공유를 위한 Plant Factory Interworking Service(PFIS) 를 설계하고 이에 대한 구현 및 서비스 테스트에 대한 연구를 수행하였다.

• Animal Bioscience
• /
• 제34권4호
• /
• pp.575-583
• /
• 2021

Objective: The aim of the study was to determine the effect of parity and the stage of lactation on the metabolic profile of cows based on the basic chemical milk components and the blood parameters. Methods: The study material consisted of high-yielding Holstein-Friesian cows. In total, 473 cows were examined. According to the parity, cows were divided into four groups: primiparous (P), and multiparous in the second (M2), in the third (M3), and in subsequent lactations (M4). The feeding of cows was based on total mixed ration (TMR) ad libitum. Milk and blood samples were collected individually from each cow three times per standard lactation period. Results: Greater exacerbation of changes in the dynamics of the blood plasma parameters examined was proved for multiparous cows. The highest value of β-hydroxybutyrate acid (0.946 mmol/L) was found for multiparous cows from group M3 at the beginning of lactation. However, it was still in the normal range. The results showed aspartate aminotransferase, and gamma-glutamyl transferase (GGT) activities in dairy cows during lactation had significant variations taking in to account stage of lactation. The highest activity of GGT was found in the group of the oldest cows and measured from 26.36 U/L at the beginning of lactation to 48.75 U/L at the end of the lactation period. Conclusion: The time-related changes in the concentrations of the biochemical parameters described differ markedly among lactating cows, though the housing conditions on the research dairy farm are highly standardised. This indicates that the ability to cope with metabolic stress is mainly affected by the individual predispositions of cows and feed nutrient supply in different stage of lactation. Especially, the feed nutrient supply (in net energy for lactation), which was the best in TMR 1 in comparison TMR 3.

• 영어영문학
• /
• 제54권4호
• /
• pp.561-577
• /
• 2008

L.M. Montgomery's Anne of Green Gables is not only confidently labelled a Canadian classic but also placed as a national icon along with the moose, the beaver, and the Habs in Canada. Anne's 'Canadianness' is partly due to its location in the rural world of Prince Edward Island. The fictional Avonlea is described as the ideal space where Canadian spirit can interact with the personified surrounding landscapes through Celtic imagination. Additionally, the communal bond of Avonlea fully demonstrates Scottish Canadian identities. The Scottish national character of Avonlea is responsible for clannishness of the Cuthberts and the Lyndes. The disrespect to the French is also due to Scottish heritage in Avonlea. As an outsider Anne wants to be integrated into the community of Avonlea, and successfully adapts herself to the regional shared values. Meanwhile she partly challenges the strictness and rigidness of the born Canadian Avonlea residents. Despite its Canadian origin, Anne of Green Gables is accepted as part of the American canon of children's literature in the Unite States. The configuration of Anne as an American heroine is noticeable among American scholars: by relocating it to the US the female Bildungsroman in the nineteenth century America, a group of literary critics adapt Anne as an American girl for American readers. The heroine of Anne of Green Gables is linked to American novels such as Louisa May Alcott's Little Women, Kate Douglas Wiggin's Rebecca of Sunnybrook Farm and Gene Stratten Porter's A Girl of the Limberlost. Anne is even classified as another Caddie by American literary critics: Anne is placed at the center of Caddie Woodlawn Syndrome as another Wisconsin pioneer child. Canadian identity of Anne is intentionally excluded and Anne was reborn as an American girl in the U.S. In this context, Anne functions as a sign of nation and a site for cross-national identity formation.

• 대한임베디드공학회논문지
• /
• 제2권3호
• /
• pp.202-208
• /
• 2007

본 논문에서는 USN 응용을 분류하는 기법을 제시하였다. 분류의 기준은 3가지인데 서비스의 심각성 유무, 관측자의 이동성 유무, 관측대상의 이동성 유무이다. 각 분류에 의해 8가지로 분류하였으나 그 중, 관측자가 이동하는 경우는 서비스의 심각성 유무에 관계없이 하나로 분류하여 총 7가지로 분류하였다. 각 분류에 해당하는 서비스들을 예시하였고 특정을 기술하였다. 본 논문에서 제시한 분류기법을 따르면 U-city의 3대 서비스에 속하는 원격 모니터링 서비스, 실내 위치인식 서비스 텔레매틱스 서비스가 도출되며 그 특징을 쉽게 파악할 수 있다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제3권4호
• /
• pp.287-292
• /
• 1990

1.86 million (Indigenous river, swamp, and swamp X river type) buffaloes are distributed mainly in the plain land, sugarcane belt and coastal area of Bangladesh and are raised by the small farm holders. Buffaloes per house-hold ranges from 5.79 to 2.12. Height at wither is $123{\pm}3.09$ and $112.5{\pm}2.15cm$ for buffaloes of central and eastern region respectively. Growth rate of buffalo calves ranges from 360 to 340 g/day. Late maturity ($1411.58{\pm}43.01d$) along with long life span facilitates farmers to use buffaloes longer period. Average daily milk yield is $2.32{\pm}0.63L$ with average lactation yield of $730{\pm}90l$ for $328{\pm}28.76d$. Both male and female individuals are used for draught purpose. A pair of buffalo can prepared $0.23{\pm}0.06ha$ of land daily and can work for $6.1{\pm}0.78hr$.

• 농촌지도와개발
• /
• 제25권1호
• /
• pp.45-56
• /
• 2018

This study analyzed the selection factors for cultivation practices in paddy rice farming. For the study, conjoint model with part-worth utility was adopted, where model profiles included three attributes of yield, production cost, and cultivation difficulties and two levels for each attribute. The value of each level was set up with experimental data obtained from National Institute of Crop Science. Ninety three rice farmers, who joined Korea Rural Economic Institute as farmer correspondences, were surveyed through internet with the profiles selected by factorial design. Result showed that rice farmers considered cultivation difficulties as the most important selection factor to adopt new cultivation practices followed by production cost and yield in consecutive order. This results were robust in spite of past experiences with new practices, willingness to adopt new practices in the future, imitative nature and government interventions.

• Wind and Structures
• /
• 제27권3호
• /
• pp.187-197
• /
• 2018

In this study, aerodynamic characteristics of a horizontal axis wind turbine (HAWT) were evaluated and discussed in terms of measured data in existing onshore wind farm. Five wind turbines (T1, T2, T3, T4 and T5) were selected, and hub-height wind speed, $U_D$, wind turbine power output, P and turbine rotational speed, ${\Omega}$ data measured from these turbines were used for evaluation. In order to obtain characteristics of axial flow induction factor, a, power coefficient, $C_p$, thrust force coefficient, $C_T$, thrust force, T and tangential flow induction factor, a', Blade Element Momentum (BEM) theory was used. According to the results obtained, during a year, probability density of turbines at a rotational speed of 16.1 rpm was determined as approximately 45%. Optimum tip speed ratio was calculated to be 7.12 for most efficient wind turbine. Maximum $C_p$ was found to be 30% corresponding to this tip speed ratio.