• Asian-Australasian Journal of Animal Sciences
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• 제28권11호
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• pp.1573-1582
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• 2015

This study was to investigate the effect of soyabean isoflavones (SIF) on onset of puberty, serum hormone concentration, and gene expression in hypothalamus, pituitary and ovary of female Bama miniature pigs. Fifty five, 35-days old pigs were randomly assigned into 5 treatment groups consisting of 11 pigs per treatment. Results showed that dietary supplementation of varying dosage (0, 250, 500, and 1,250 mg/kg) of SIF induced puberty delay of the pigs with the age of puberty of pigs fed basal diet supplemented with 1,250 mg/kg SIF was significantly higher (p<0.05) compared to control. Supplementation of SIF or estradiol valerate (EV) reduced (p<0.05) serum gonadotrophin releasing hormone and luteinizing hormone concentration, but increased follicle-stimulating hormone concentration in pigs at 4 months of age. The expression of KiSS-1 metastasis-suppressor (KISS1), steroidogenic acute regulatory protein (StAR) and 3-beta-hydroxysteroid dehydrogenase/delta-5-delta-4 isomerase ($3{\beta}-HSD$) was reduced (p<0.01) in SIF-supplemented groups. Expression of gonadotropin-releasing hormone receptor in the pituitary of miniature pigs was reduced (p<0.05) compared to the control when exposed to 250, 1,250 mg/kg SIF and EV. Pigs on 250 mg/kg SIF and EV also showed reduced (p<0.05) expression of cytochrome P450 19A1 compared to the control. Our results indicated that dietary supplementation of SIF induced puberty delay, which may be due to down-regulation of key genes that play vital roles in the synthesis of steroid hormones.

• 디자인학연구
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• 제11권1호
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• pp.43-52
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• 1998

자연과 인간, 과학기술의 조화를 요하는 시대적 흐름에 따라 과학관은 대중에게 친숙한 공간이 되어 그 수요가 늘고 있다. 과학기술문화에 대한 정보는 산업화, 정보화, 전문화 사회에 있어 미래를 개척하는 힘이다. 따라서 그러한 정보를 전달하는 전시관은 적극적이고 활발한 정보의 교류가 이루어지도록 계획되어야 하는데 그것은 잘 짜여진 전시 연출의 기획과정을 통해 가능하다. 본 연구는 전시관의 디자인에 있어서 연출의 중요성을 밝히는 데에 의의를 둔다. 연구의 진행 과정은 다음과 같다. 1. 과학관의 기능과 역할을 고찰하고 전시 연출에 대한 개념을 정립하다. 2. 전시공간을 연출하기 위해서 사용되는 매체와 기법을 제시하고 연출 사례를 연구한다. 3. 구체적인 전시 연출의 기획 과정과 연출에 따른 시나리오를 제안하여 연출의 효과와 중요성을 밝힌다 연구 결과 연출은 전시의 효율성(활발한 정보의 커뮤니케이션)을 증대시키는 효과를 가져오며 따라서 기획에 있어서 반드시 고려되어야 하는 과정임을 알 수 있었다.

• Advances in Energy Research
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• 제6권1호
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• pp.17-33
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• 2019

This study aimed to observe trends in the literature on research, development, and innovation management in the energy sector, using performance assessment systems. The paper presented a bibliometric analysis of 40 studies on the subject. These materials come from ScienceDirect, Scopus and the Institute of Electrical and Electronics Engineers (IEEE) databases from 2006 to 2016. The results showed an increasing trend in the number of publications on the theme, showing the scientific community's interest in the subject. In addition, it was verified that the predominant language used to write the publications was English, the country that most published articles in the area was Brazil and most of the articles were produced through collaboration between researchers. It was found that the journal with the greatest number of publications on the subject was the Procedia - Social and Behavioral Sciences, while the Expert Systems with Applications journal presented the article with the greatest number of citations. This analysis allowed us to identify important points of the research and its future directions, in addition to enabling a better understanding of the world trend of the subject approached.

• 농업과학연구
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• 제49권4호
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• pp.919-926
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• 2022

Fertigation, which has been introduced in agricultural fields since 1990, has been widely practiced in upland fields as well as in plastic film houses as part of the crop production system. In accordance with demands in the agricultural sector, a huge number of scientific studies on fertigation have been conducted worldwide. Moreover, with a combination of advanced technologies such as big-data, machine learning, etc., fertigation is positioned as an indispensable tool to achieve sustainable crop production and to enhance nutrient and water use efficiency. In this review, we focused on providing valuable information in terms of crop production and nutrient/water use efficiency. A variety of fertigation studies have described that enhancement of crop production did not differ relative to conventional method or slightly increased. In contrast, fertigation significantly improved nutrient/water use efficiency, with a reduction in use ranging from 20 to 50%. Water-soluble organic resources such as livestock manure and agricultural byproducts also have been identified as useful resources like chemical fertilizers. Furthermore, the initial irrigation point was generally recommended in a range of -10 - -40 kPa, although the point differed according to the crop and crop growth stage. From this review, we suggest that fertigation, which is closely integrated with advanced technology, could be a leading technology to attain not only food security but also carbon neutrality via improvement of nutrient/water use efficiency.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.562-563
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• 2004

Environmental management system has been constructed using by marine GIS, which is applied latest scientific algorithm, and fisheries related data for the citizens of the Jinhae Bay and executive officers. Through this system, we will get more easily marine environmental data, and production features of aquaculture farming areas.

• Fisheries and Aquatic Sciences
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• 제17권3호
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• pp.369-376
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• 2014

I provide an overview of the application of hydroacoustic methods in South Korea to understand the current research status in relation to fisheries acoustics and to determine which areas require further study. One main purpose for using a scientific echosounder, a representative tool using the hydroacoustic method, is to evaluate the abundance of fisheries resources. Thus, two representative methods for abundance estimation are described. The history of fisheries acoustics worldwide is also summarized.

• 한국음향학회:학술대회논문집
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• 한국음향학회 1994년도 FIFTH WESTERN PACIFIC REGIONAL ACOUSTICS CONFERENCE SEOUL KOREA
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• pp.728-733
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• 1994

Scientific foundation for ultrasonic scale preventing devices construction was given in 40S-50S of this century but their production in former USSR was organized later in 70th. Several different principles of scale preventing is overviewed together with physical principles of ultrasonic method. Practical experience received in USSR in 80S is discussed. Technical decisions and inventions used for construction of the first device UZU-1 produced in Cheboksary plant are enumerated and principles of UZU-2 device are briefly sketched.

• 산업경영시스템학회지
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• 제3권3호
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• pp.75-78
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• 1980

1) The great expansion of industrial activity based on largely upon the products of scientific research, with widespread ownership and with greater demands on accounting for financial control and reporting. 2) The search for productivity, through the development of the mass production systems in industry, with their great emphasis on cost accounting and efficiency 3) The trend toward greater government influence In the affairs of business through taxation and regulation.

• 한국식품과학회지
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• 제9권1호
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• pp.84-88
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• 1977

Cereal production and utilization in Australia are described briefly. Emphasis is on wheat which is the principal cereal crop for both 'home' use and for export. Some of the main fields of research on wheat quality and process technology are outlined. Reference is made to basic scientific studies in plant physiology, biochemistry and dough rheology, and a more detailed account is given of work at the Bread Research Institute on milling and baking technology.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.768-778
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• 1993

The system is designed for the production and processing of feed, fertilizer, sugar , and grain. It can be used to weigh and transport automatically their pellet, power or nonstickness materials. In this system, we use discontinuous totalising automatic weighing instruments to weigh materials. It is a closed-cycle control system controlled by industrial controlling computer STD bus. The system used for processing grain and feed can improve the quality of products , carry out scientific management, increase productivity and decrease the intensity of labour