• Current Industrial and Technological Trends in Aerospace
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• v.6 no.1
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• pp.35-43
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• 2008

Technical trends of propulsion system for small aircraft are investigated. Currently, most small aircraft are equipped with piston engine, turboprop and turbofan engines, and the technology development is going continuously. For piston engines, new diesel engines are arising besides gasoline engine. The diesel engines use relatively low-cost and easy to get fuel(Jet A), so the demand for small aircraft is getting increased, and new engines with high reliability and efficiency are being developed. For gas turbine engines, application of small turbofan is getting increased for newly arising VLJ market and the engine demand will be rapidly increased in the future. On the other hand, some electric propulsions without fossil fuels are being developed without high cost of fuel and environmental effects. In the future, propulsion system for small aircraft will be developed having enhancement of performance and efficiency with higher reliability and safety.

• The Journal of the Korea Contents Association
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• v.20 no.2
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• pp.371-381
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• 2020

The purpose of this study is to analyze the research trends of adaptation research of adolescents in multicultural families and to seek future research tasks and directions. For this purpose, a total of 94 journal papers were selected and the research status, research method, research subject, and research contents were examined. The analysis results are as follows. Firstly, journal articles has been steadily appearing since the 1st edition in 2007, and has soared since 2018. As a result of examining the number of papers by journal, a total of 50 papers were found in various fields. By journal field, 37(74%) were the most in the social science field. Second, among the analysis results of the research method, 68 research surveys were found, and quantitative research analysis methods accounted for 74%. Third, as a result of analyzing the research subjects, 75 cases were studied directly for multicultural adolescents only, and 19 others studied parents, teachers (workers) or adolescents and other subjects together. Fourth, in the contents of the study, school adaptation characteristics were the most frequently(52), followed by sociocultural adaptation characteristics(37). Based on the analysis results, future research directions and tasks were discussed.

• Fashion & Textile Research Journal
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• v.19 no.1
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• pp.70-78
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• 2017

To predict and foster professional research issues for the present and future, it is important to understand the stream of research trends. This study is to provide information of research trend through analysis of quantitative variables in 1,374 articles from the first issue to the present(2015) of the Fashion and Textiles Research Journal. As a result, in the former periods, articles in the field of textile science & technology and fashion design & historical concerns, and articles that used experiments and others as a research method were dominant; in the latter periods, articles in the field of fashion marketing & merchandising and apparel production & technology, and articles that used survey as a research method were dominant. According to each detailed research field and method, there were significant differences in the number of pages, authors and references of articles. In addition, it was found that the number of pages and the number of references increased sharply in the latter period, indicating that the contents of the papers were more detailed and faithful to references of other studies. Through the analysis of this study, it was found that Fashion and Textiles Research Journal published a variety of articles in the academic fields. The research information analyzed in this study will contribute to the future design for the research as well as the academic societies.

• Journal of The Korean Society of Agricultural Engineers
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• v.57 no.1
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• pp.37-45
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• 2015

Recent droughts in South Korea have had large economic and environmental impacts across the country. Changes in rainfall and hydrologic patterns due to climate change can potentially increase the occurrence of extreme droughts and affect the future availability of water resources. Therefore, it is necessary to evaluate drought vulnerability for water resources planning and management, and identify the appropriate mitigation actions to conduct a drought risk analysis in the context of climate change. The objective of this study is changes in the temporal trends of drought characteristics in South Korea to examine drought impacts under climate change. First, the changes of drought occurrence were analyzed by applying the Standardized Precipitation Evapotranspiration Index (SPEI) for meteorological data on 54 meteorological stations, and were analyzed for the past 30 years (1981-2010), and Representative Concentration Pathways (RCP) climate change scenarios (2011-2100). Second, the changes on the temporal trends of drought characteristics were performed using run theory, which was used to compare drought duration, severity, and magnitude to allow for quantitative evaluations under past and future climate conditions. These results show the high influence of climate change on drought phenomenon, and will contribute to water resources management and drought countermeasures to climate change.

• Journal of Convergence for Information Technology
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• v.7 no.5
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• pp.149-155
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• 2017

The aim of this study is to provide a direction for future research by examining research trends on women in social welfare field in recent years. This study has theoretical significance in terms of expanding the horizon of social welfare knowledge by accumulating new research results based on previous research results on this topic. Using content analysis, we analyzed 37 studies on women published in Korean Journal of Social Welfare during 2009 ~ 2017 focusing on research subjects, research topics, and methods. The results of analyzing the research subjects indicated that women were described as client, family, and worker. In terms of the research topics, the results revealed a total of thirteen themes. In addition, the results showed that empirical research methods were dominant. It is suggested that more efforts should be made in future studies to broaden the scope of research subjects, topics, and methodologies in this filed.

• The Journal of Korean Obstetrics and Gynecology
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• v.30 no.4
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• pp.89-99
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• 2017

Objectives: The purpose of this study is to examines the domestic study trends on adenomyosis treated with Korean medicine. Methods: We investigated the studies on Korean medicine treatment for adenomyosis via searching 8 online databases. Results: As a result, 12 records (14 cases) were found to be analyzed according to their modes of diagnosis, symptoms, interventions, treatment period, follow up period and relevant outcomes. In diagnosis of adenomyosis, the most used method was ultrasonography. The most common complaint for patients with adenomyosis was dysmenorrhea. The most applied intervention for adenomyosis was herbal medication. Acupuncture was the second most used. Conclusions: Analyzing the domestic study trends would be helpful to establish a basic knowledge of the future study. It is anticipated that this review benefits the future in-depth study to confirm the efficacy of Korean medicine treatments for adenomyosis.

• Journal of Korean Society of Forest Science
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• v.110 no.3
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• pp.308-321
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• 2021

The purpose of this study was to analyze domestic research trends over the past 20 years and future direction of forest ecology using text mining. A total of 1,015 academic papers and keywords data related to forest ecology were collected by the "Research and Information Service Section" and analyzed using big data analysis programs, such as Textom and UCINET. From the results of word frequency and N-gram analyses, we found domestic studies on forest ecology rapidly increased since 2011. The most common research topic was "species diversity" over the past 20 years and "climate change" became a major topic since 2011. Based on CONCOR analysis, study subjects were grouped intoeight categories, such as "species diversity," "environmental policy," "climate change," "management," "plant taxonomy," "habitat suitability index," "vascular plants," and "recreation and welfare." Consequently, species diversity and climate change will remain important topics in the future and diversifying and expanding domestic research topics following global research trendsis necessary.

• Journal of the Korean Society for Library and Information Science
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• v.53 no.3
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• pp.63-82
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• 2019

Libraries are recently emerging as the core institutions designed to resolve the information equality that is forecasted to further deepen with the arrival of the fourth industry revolution era. This study thus analyzed the trends of studies on the library services offered to people suffering information inequality in Korea, and proposed measures for the activation of the research and future studies so as to strengthen the domestic library services targeting the people suffering information equality and to promote the research. As a result, proposed as measures for the activation of research were (1) Policy support and project expansion at the national level, (2) Various approaches and research environment creation at the academic level, (3) Strengthening of services for the various levels of people suffering information inequality and deployment of professional librarians at the level of libraries, and (4) Encouraging librarians to enroll with graduate schools and to conduct research. Further, proposed were the future studies that can be approached according to the various levels of people suffering information inequality, such as disabled people, multicultural family members, elderly people, children, youth, agricultural and fishing areas, low-income people, and refugees(North Korea defectors).

• Journal of the Korea Convergence Society
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• v.10 no.4
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• pp.295-302
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• 2019

The purpose of this study was to identify trends in nursing research on multicultural family in Korea and suggest the direction for future research. A COSI model was used to guide the search process between the years 2008 and 2016, using the keywords 'cultural diversity', 'women', 'spouses', 'family', 'children' and 'nursing'. Of papers 137, 19 were doctoral dissertations, 10 were master's theses and 108 were from academic journals. Nursing research on internal married immigrant women has been steadily increasing since 2011. True experimental studies began in 2014 and most of the experimental studies were quasi-experimental studies. The research subjects were married immigrant women, and research on children, husband, mother-in-law and couple was very poor. The lack of information on the validity/reliability of the translated instruments were noted. The overall findings of this study suggest that future research should include more well-designed experimental studies. It is necessary to extend the study to husband and mother-in-law living with married immigrant women. Considering the ethnic background of the subject, it is necessary to develop a research tool with well-translated validity and reliability.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.611-617
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• 2018

This study divided hairpiece-related technologies into three categories: Materials, Structure, Hair Extensions. Then, it investigated the current patent application trends in the above technologies and attempted to determine what aspects should be focused on in terms of the growth potential of hairpiece-related technologies and future technologies. A hairpiece is used to cover a specific balding area resulting from innate factors such as heredity or acquired traits including disease or accident. It is also used to make short hair look longer. Recently, as the rates of hair loss caused by stress increase, there has been a rising demand for hairpieces that can quickly and conveniently cover a balding region as well as satisfy people's aesthetic needs through diverse hairstyling. Even though patents have been applied evenly across hairpiece technology fields, patent activity has declined since 2010 was confirmed. Therefore, this study targets the facilitation and expansion of the hairpiece technology market by suggesting desirable R&D directions for future hairpiece-related technologies after analyzing current hairpiece patent trends.