• 월간낙농육우
• /
• v.24 no.9 s.269
• /
• pp.150-155
• /
• 2004

2003년을 기점으로 국내 소 부루세라병 발생이 한우농가를 중심으로 예년에 비해 급속히 증가하고 있다. 가축의 이동증가와 사육규모의 증가는 전염병의 발생위험을 높일 뿐만 아니라 발생규모의 증가를 가져와 발생시 그 피해가 훨씬 심각하다. 또한 근래에 부루세라 백신접종에 대한 논의가 다시되고 있어 이번 기회에 부루세라병의 원인과 예방방법에 대해 알아보고자 한다.

• 전기의세계
• /
• v.29 no.10
• /
• pp.609-614
• /
• 1980

이태리의 발.송전 제어계통은 로마에 있는 중앙제어소와 여덟개의 지방제어소, 원격제어소 및 원격소의 원격단말장치로 구성되어 있는 다계층구조를 가지고 있다. 제어기능과 제어소 및 계통구조의 필요조건에 대하여 기술하였으며 특히 정상조건에서 사용되는 운전방법과 컴퓨터 시스템의 고장에 대처해가는 방법에 대하여 중점을 두었다.

• LP가스
• /
• v.22 no.5
• /
• pp.38-41
• /
• 2010

정부는 9.2일 "제70차 비상경제대책회의"를 열고 "추석민생 및 물가안정대책"을 발표하였으며, 지식경제부 최경환장관은 동 회의에 참석하여 "석유시장의 '소비자 선택권' 확대방안"을 보고하였다. 이날 발표된 내용은 LPG자동차충전소도 함께 적용될 예정이어서 관련 내용을 게재한다.

• Proceedings of the KIEE Conference
• /
• 2007.07a
• /
• pp.1430-1431
• /
• 2007

중수소와 3중수소를 융합시키는 D-T반응에서 높은 온도와 억류시간의 필요에 따른 불안정성이 발생하는데 본 연구에서는 역전자계 배위를 형성하여 안정한 배위를 형성하여 불안정성을 억제하였다.

• 사료
• /
• s.14
• /
• pp.61-66
• /
• 2005

2005년 2월 현재 미국은 육류 단백질에 대한 수요가 크게 증가한 반면 육류 공급 증가는 수요에 미치지 못하여 가격은 높은 수준을 유지하고 있다. 또한 곡물가격은 적정한 수준을 유지하고, 여러 해 지속된 미 서부의 가뭄이 해소되고 있다. 생산자들은 수익 향상에 따라 반응하고 있다 .돼지와 가금류 생산자들은 현재 이들 산업의 호전된 수익성에 반응하여 생산량을 완만하게 증가시킬 것으로 예상된다. 소 사육 부문도 흑자를 기록하고 있으며, 미 서부의 가뭄이 해소되면서 소 사육두수가 증가하여 회복기로 접어들었다.

• Journal of Digital Convergence
• /
• v.12 no.4
• /
• pp.349-356
• /
• 2014

This research is aimed to prove if harmful effects of smoking, as the main reason for recently elevated blood vessel disease, could be reduced by aerobic exercise, and identify the positive effects of the aerobic exercise on smokers' blood vessel health(blood pressure, pulse pressure, and blood vessel elasticity. Experiments were performed on 40 male smokers aged between 40 and 55, which was equally divided into two groups of Aerobic Exercise Group (AEG) and Non Exercise Group (NEG). After measuring each group's blood pressure, pulse pressure, and blood vessel elasticity, AEG practiced aerobic exercise program for 50 minutes for each trial, three times a week, sustaining 12 weeks while NEG continued daily-life patterns without any special treatment. In 12 weeks, blood pressure, pulse pressure, and blood vessel elasticity of both groups were measured as the same way. As a result, the difference of systolic blood pressure between the two groups was not significant, while that of diastolic blood pressure was meaningful. The difference of pulse pressure between the two groups was meaningful, and that of blood vessel elasticity was also meaningful in all measuring points including left hand, right hand, left foot and right foot. As a consequent, it was found that aerobic exercise had positive effects on middle aged male smokers' blood vessel health.

• Journal of the Korean earth science society
• /
• v.29 no.2
• /
• pp.151-162
• /
• 2008

This study quantitatively investigated the actual situations and perceptions of gifted students and their teachers during small group inquiry activities in Korea. Some 1,670 gifted math students and 1,732 gifted science students as well as 614 of their teachers were selected through random sampling to participate in this study. Data were collected by means of a survey developed by the researchers of this study, based on reviews of literature related to inquiry and small group cooperative learning. The results were as follows: (1) In Korean gifted education, small group inquiry activities were frequently used as teaching and learning strategies, and both the students and teachers perceived its effects to be very positive in terms of cognition and affection. (2) Gifted education teachers emphasized the development of students' procedural inquiry skills as well as logical thinking skills, whereas they were indifferent to the essential elements of small group cooperative learning and therefore the lessons did not surpass the level of traditional group activities. (3) The fact that the actual small group inquiry activities did not reflect the characteristics of well-organized small group activities is due to a lack of knowledge on the teacher's part as to effective teaching strategies concerning cooperative learning. This study implies that gifted education teachers require the opportunity to reflect on and develop their knowledge and understanding of small group inquiry activities through professionally developed programs in order to maximize the effectiveness of small group inquiry activities in gifted education.

• Journal of Animal Science and Technology
• /
• v.45 no.6
• /
• pp.1019-1030
• /
• 2003

The study was conducted to isolate and identify highly fibrolytic anaerobic fungi from the guts of a Hanwoo steer and a Korean native goat, and then investigate the characterization of cellulolytic activity of an anaerobic fungus. Twenty-one anaerobic fungal colonies were isolated in the study, in which 16 colonies were isolated from the rumen contents of the Hanwoo steer and 5 colonies from the duodenal fluids of the Korean native goat. Four anaerobic fungi were selected based on higher cellulolytic enzyme activities to identify under a optical microscope. NLRI-M003 and -T004 belong to Neocallimastix genus and NLRI-M014 belongs to Piromyces genus based on the morphology of their thallus, sporangia, rhizoid and the number of flagella. NLRI-M001 appeared to be an unknown strain of anaerobic fungi due to its different morphology from existing types of anaerobic fungi, though the morpholgoy is similar to Orpinomyces sp. Supplementation of 2% anaerobic fungal culture(NLRI-M003) in rumen-mixed microorganisms increased in vitro DM degradability of rice straw and filter paper up to 4 and 11%, respectively, compared with non-supplementation(control). CMCase and xylanase activities in in vitro culture were also higher in 2% fungal supplementation than controls in both rice straw and filter paper substrates.

• Journal of the Korean Institute of Landscape Architecture
• /
• v.48 no.1
• /
• pp.1-14
• /
• 2020

Various policies and studies regarding use of PBSS (Public Bike Sharing System) and Programs (PBSP) have been conducted worldwide as the number systems or programs has increased. Although various phenomena and demands have been generated by the use of PBSS in everyday life, the majority of research and the policies in South Korea have been implemented focused on commuting life. The purpose of this study aimed to understand various PBSS demands using PBSS usage data in 2018 in the Yeouido districts through classifying usage patterns and analyzing features. The rental stations were classified into three types based on weekday/weekend usage rates. The usage of Yeouido's PBSS accounted for 4.3% of the total usage in Seoul Metropolitan City, while the number of PBSS rental stations accounted for 2% of all rental stations in the Seoul urban areas. Rental stations with a higher weekday utilization rates showed high utilization rates in all four seasons and were mainly distributed in work and residential areas. Other stations showed a concentrated usage pattern in spring (April-May) and autumn (September-October) seasons, and their locations were close to the entrance of nearby parks. Besides, renting and returning were often concentrated at certain rental stations for high weekend utilization as compared to the pattern of high weekday usage. Therefore, PBSS management and programs should be operated to reflect various usage demands rather than uniform PBSS operations. The result of this study is meaningful to provide basic data for effective PBSS operation by monitoring the demand for PBSS usage in spatio-temporal terms.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.23 no.5
• /
• pp.767-773
• /
• 1994

The dietary fiber intakes of Korean were estimated based on the data from the National Nutrition Survey in 1989. From the data, 566 foods which contain dietary fiber were selected.The intake estimation was done based on these foods. Results were summarized as followed ; Mean DF intake of nationwide population was 17.53g/day and most of these were come from vegetables. Mean DF intake of rural population was slightly lower than that of urban's. Major sources of DF were vegetables, cereals & grain products, seaweeds, fruits, fungi & mushrooms and legumens & their products in order. Vegetables were the major sources of DF which occupied 32.4% of total intake. Among them, kimchi and red pepper were the representative sources. Among cereals & grain products, rice was found to be the most important DF source occupying 12.2% of total DF. And fried noodle, loaf bread and barley were followed. Sea mustard among seaweeds, apples and persimmons among fruits, oyster mushroom and mushroom among fungi & mushrooms and soybean sprout among legumes & their products were favorable sources of DF. 653 households out of 1, 925(33.9%) were consummed 10~15g of DF per day.