• 한국유기농업학회지
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• 제30권3호
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• pp.351-374
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• 2022

In recent years, the development of rice industry has been highly valued by the state. In hubei area, due to the development of the modernization and the shortage of labor, traditional way of rice cultivation methods is facing serious challenges, and economic benefits have become the decisive factor for the effective promotion and application of rice cultivation methods. According to the research results, first, in the input-side analysis, in the CCR model, D5, D12, D26, D28, D32, D36 farmers with high efficiency appear. The analysis result shows that among the 60 farmers, the average efficiency is 89%, and there is an inefficiency of 11%. In the BCC model, 14 farmers were identified as high-efficiency farmers, with an average efficiency of 0.9453. Second, in direct seeding cultivation of rice, the average scale efficiency is 0.9227, while the average pure technical efficiency is 0.9644. This shows that the effect of scale efficiency is greater than that of purely technical factors, ignoring the reasons for the low operational efficiency of direct seeding cultivation farmers. It can be predicted that with the further deepening of farmers' understanding of this planting mode, the proportion of rice direct seeding may be further expanded in the future. Relevant agricultural departments should further promote this technology to farmers, study the direct seeding technology using scientific methods, and evaluate the changes of this cultivation mode. The agricultural departments of government should concern about the climate risk assessment of direct seeding rice, the environmental impact assessment caused by the extensive use of herbicides, the application of mechanical technology in the process of direct seeding, the lodging of direct seeding rice, and other related issues.

• 한국융합학회논문지
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• 제13권2호
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• pp.293-302
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• 2022

본 연구는 아동그룹홈에 대한 국가 및 지방자치단체의 예산 규모 및 항목 분석을 통하여 그룹홈 운영 지원의 문제점 및 개선방안을 파악하고자 하였다. 주요 결과는 첫째, 아동그룹홈의 인건비 지원에 있어 동종 시설 간 및 지역 간 종사자들의 처우에 있어 큰 차이가 발생한다는 점이며 소규모 보호시설 운영 시 종사자의 과중한 업무 부담과 이에 따른 소진이 발생할 수 밖에 없는 지원 구조를 가지고 있다는 것이었다. 둘째, 운영비 지원은 아동의 보편적이고 특수한 욕구를 충족하는데 절대적으로 부족하며 동종 시설 간 상대적 차이가 확인되었다. 셋째, 아동그룹홈에 대한 별도의 사업비 지원이 없어 안정적인 사업 기획 및 실행의 한계가 파악되었다. 이러한 분석 결과를 바탕으로 그룹홈 보호아동에 대한 적절한 보호가 이루어질 수 있도록 아동 그룹홈의 예산 지원 방안을 논하였다.

• 한국정보통신학회논문지
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• 제26권9호
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• pp.1259-1265
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• 2022

최근 인공지능, 빅데이터, 사물인터넷 기술이 안전사고 예방을 위한 화재 감지, 가스나 유해 물질 감지 등 다양한 솔루션에서 활용되고 있다. 2021년 고용노동부에서 발간한 산업 재해 발생 현황에 따르면, 2020년과 비교해 재해율, 재해자 수, 사망자 수가 증가하였으며 최근에는 중대재해 처벌 등에 관한 법률과 같은 안전조치를 강화하는 등 제도적, 사회적 관심이 높아지고 있다. 본 논문에서는 한국지능정보사회진흥원(NIA)에서 제공한 데이터셋 구축 가이드라인을 참고하여 현장에서 직접 수집해 데이터셋을 직접 구축하고 YOLOv4로 학습하여 객체 탐지를 통해 충돌위험 객체 탐지 시스템을 제안하고자 한다. 위험 상황 규칙 위반에 대한 정확도는 실내 88%, 실외 92%의 탐지 성능을 보였다. 이러한 시스템을 통해 산업 현장에서 발생하는 안전사고를 사전에 분석해 지능형 플랫폼 연구에 활용이 가능할 것으로 사료된다.

• 아태비즈니스연구
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• 제12권4호
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• pp.193-209
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• 2021

Purpose - The purpose of this study is to specify the relationship between demographic cohesion and firm performance by examining the roles of HR practices, such as job rotation and flexible work arrangement. Design/methodology/approach - This study samples 1,093 firms in Korea and collects their data between 2007 and 2017 from Workplace Panel Survey, a database from Korea Labor Institute. The demographic cohesion is measured using the Herphindal-Hershman index and the firm performance is measured with net incomes. This study employs a fixed-effects model for the estimation of firm performance with respect to demographic cohesion, job rotation, and flexible work arrangement. Findings - There is a positive relationship between demographic cohesion and net incomes. And the relationship is positively moderated by job rotation. However, flexible work arrangement shows a mixed moderation. Research implications or Originality - Differentiated from the studies on demographic diversity, this study shows that demographic cohesion has a mixed impact on firm performance. While demographic cohesion can improve firm performance through trust building, in-group favoritism, and collective identity it entails internal conflicts. However the link between demographic cohesion and firm performance is moderated by job rotation and flexible work arrangement. While there is a positive moderation of job rotation, there is a negative moderation of flexible work arrangement.

• 한국환경과학회지
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• 제31권9호
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• pp.735-741
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• 2022

Global warming affects forests and their ecology. Diversity in the forest is a buffer that reduces the damage due to global warming. Mixed forests are ecologically more valuable as versatile habitats and are effective in preventing landslides. In Korea, most forests were created by simple afforestation with trees of evergreen species. Typically, evergreen trees are shallow-rooted, and deciduous trees are deep-rooted. Mixed forest tree roots grip the soil effectively, which reduces the occurrence of landslides. Therefore, improving the distribution of tree types is essential to reduce damage due to global warming. For this improvement, the investigation of tree types of the forest is needed. However, determining the tree type distribution of forests that are spread over wide areas is labor-intensive and time-consuming. This study suggests effective methods for determining the distribution of tree types in a forest that is spread across a relatively wide area. Using normalized difference vegetation index and RGB images from unmanned aerial vehicles, each evergreen and deciduous tree, and grassland area can be distinguished. The distinguished image determines the distribution of tree type. This method is effective compared to directly determining the tree type distribution in the forest by the use of manpower. The data from these methods could be applied to plan a mixed forest or to prepare for future damage due to global warming.

• 수산해양기술연구
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• 제59권2호
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• pp.164-171
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• 2023

This study analyzed the flow inside floating seedling equipment for Scapharca subcrenata. Due to the aging society of fishing villages, it is impossible to continuously input the labor force. Therefore, it is necessary to improve efficiency. Scapharca subcrenata has high per capita consumption. It serves as an important aquatic food resource. Scapharca subcrenata culture tends to be highly dependent on the natural environment. Production of Scapharca subcrenata is difficult to predict with low stability. In the past, manpower directly installed bamboo nets in mudflats. The seedling equipment devised in this study is a floating type and can be freely moved on the sea according to the prediction of Scapharca subcrenata generation. The flow around the floating seedling equipment was analyzed by numerical analysis. The physical phenomena of the flow around the net inside the floating seedling equipment were visualized. As a result, the space between the floating seedling equipment and the bottom net and the space between the net groups showed a lower flow rate than the inlet flow rate. It is expected that the low flow rate of the floating seedling equipment will have a positive effect on the attachment of Scapharca subcrenata.

• 인터넷정보학회논문지
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• 제24권4호
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• pp.93-105
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• 2023

디지털양식은 경험과 노동력, 자연환경 의존적인 전통 양식산업이 미래 지능형 스마트양식으로 전환하기 위한 ICT 기자재 기반의 양식산업의 디지털화와 디지털 양식데이터의 분석 및 활용을 통한 양식 재현성 향상 및 생산과정의 효율성 향상을 통한 어가의 수용성을 높이기 위해 추진되고 있다. 유럽의 선진 수산국은 양식장에 정보통신기술을 접목한 디지털화를 통한 규모화와 첨단화로 양식 기술 뿐만 아니라 양식기자재산업의 비약적인 성장을 이루고 있는 반면, 국내에는 다품종·소량생산 구조 및 어가수용성 미확보에 따른 양식생산정보의 수집조차 한계에 부딪치고 있다. 이에 본 연구에서는 스마트양식 관련 동향과 기술 요소를 분석하여 향후 지능형 스마트양식으로 전환하기 위한 한국형 디지털양식의 발전 방향을 제시하고자 한다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제49권1호
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• pp.21-29
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• 2023

Objectives: Dental or maxillofacial emergencies are uncommon during pregnancy, but if they occur, they are challenging to treat due to potential risks. The mother should not be denied necessary medical or dental care because of pregnancy. The aim of the study is to observe outcomes of pregnancy in patients requiring emergency minor oral surgical procedures during gestation and to determine the safety of the pregnant woman undergoing the procedure and the fetus. Materials and Methods: The study was conducted on 52 pregnant women requiring emergency oral surgical procedures. A standard treatment protocol for treatment of specific entities was followed. Close monitoring and observation were the primary goal of treatment. All patients were followed postoperatively until complete recovery from the surgical procedures and then until birth of the baby. A control group of 52 healthy pregnant patients who did not require oral surgical procedures was considered for statistical analysis. The measurements to calculate observation were fetal loss (spontaneous abortion), preterm birth, low-birth weight, or incidence of any congenital anomalies in the baby and its association with surgical procedures. Results: No fetal loss occurred in any of the cases. However, four patients experienced preterm birth and seven neonates exhibited low birth weights. No congenital abnormalities were discovered. In one instance, a patient who underwent surgery for a mandibular symphysis fracture under general anesthesia in the 31st week of pregnancy experienced labor pain on the fourth postoperative day, requiring an emergency Caesarean section. Conclusion: The results of our study demonstrate that, compared to the control group, minor emergency surgeries performed during pregnancy have no discernible negative effects on the fetus. These procedures can safely be performed by adhering to our described protocols.

• 농촌계획
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• 제28권4호
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• pp.93-104
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• 2022

Agriculture is one of the most vulnerable sector to droughts, and drought damage on the agriculture sector could have effects on other sector. Droughts have different characteristics compared to other extreme events, which means more sophisticated methods considering the characteristics of droughts are required when measuring their damage. The purpose of this study is to analyze the damage of droughts based on limited computational general equilibrium model. To be specific, we constructed a CGE model focusing on the agriculture sector in Korea. Also, to limit changes in land use and labor, we limited them, and assume droughts only have effects on productivity of value-added. Lastly, we simulate drought effects on rice production in Korea based on several climate scenarios and GCM to identify the economic effects of droughts. The results show that 1) the cumulated damage of droughts during 2021~2040 is higher than other periods (2040~2061, 2081~2100), 2) the correlation between the damage of droughts and SSP scenarios is insignificant. This result implies the necessity of the effective drought risk management to prevent future droughts effects, irrespective of mitigation policies. 3) Due to increases in rice price, GDP of rice sector is increased. However, GDP of the other sector and consumer welfare are decreased. This result show that indirect effects of droughts would be more important when measuring drought effects on agriculture sector.

• Journal of Korea Trade
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• 제26권5호
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• pp.1-22
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• 2022

Purpose - This study aims to analyze the influence of South Korea's outward foreign direct investment (OFDI) under the effect of both multinational enterprises' (MNEs) investment motivation and host country institutions. Some suggestions are put forward with regard to South Korean MNEs participating in and integrating into the fierce and changeable world of international market competition. Design/methodology - The basic hypotheses are that MNEs' investment motivations and the host country's superior institutions both boost South Korea's OFDI in those host countries. South Korea's OFDI is divided into investment choice stage and investment scale stage. A Heckman two-stage selection model is established for empirical analysis, using the panel data of South Korea's OFDI and related variables, from 2002 to 2019. Findings - (1) The influence on the investment scale of South Korea's OFDI is more regular and noteworthy than the influence on investment choice. (2) In the investment scale stage, there are obvious motivations to seek markets, labor force and superior technology, but not natural resources. (3) In the investment scale stage, the South Korea's OFDI is more obviously attracted by the host country's superior political institutions, economic institutions and legal institutions, but not cultural institutions. Originality/value - The choices of variables and uses of model expand the theoretical basis and empirical method of OFDI research. The results of the empirical study also provide some reference for the transnational investment of South Korean MNEs and the investment policy formulation of the South Korean government.