• 공업화학
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• 제32권3호
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• pp.229-236
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• 2021

금속 유기 골격체는 최근 20년간 센서, 촉매, 에너지 저장과 같은 많은 응용분야에서 관심을 받아온 물질이다. 이 물질을 합성하기 위해 수열 합성, 유기용매열과 같은 합성법이 제시되어 왔으나, 그 공정이 복잡하면서 고비용·장시간이 소요된다는 문제점이 제기되어 왔다. 이를 해결하기 위한 전기화학적 합성법이 새롭게 제시되었는데, 간단한 준비절차와 특정한 온도·압력 조건 없이 합성할 수 있어 기존 합성법의 단점을 보완한다는 특징이 있다. 이에 본 총설논문에서는 전기화학적으로 합성 가능한 금속 유기 골격체의 종류와 전기화학적 합성 메커니즘을 다루고 있다. 전기화학적 합성법을 통해 형성된 금속 유기 골격체를 적용한 응용분야 연구동향을 정리하였다.

• 한국기록관리학회지
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• 제21권1호
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• pp.211-230
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• 2021

이 연구는 민중가요가 장기·영구적으로 보존되고 이용될 수 있도록 OAIS 참조모형에 기반한 민중가요 메타데이터 설계를 하는 것이다, 이를 위해 문헌과 관련 기술표준 등을 조사하여 민중가요의 일반적 성격을 파악하고 민중가요 창작자와 연구자의 의견을 받아 기록물의 유형, 기록물의 장기보존 방법 및 표준, OAIS 참조모형과 각 패키지에 구성되는 메타데이터 요소를 확인하였다. 연구결과 1) 민중가요는 사회적 변혁을 위한 목적으로 창작되었고 비상업적 특성으로 상업성을 목적으로 하는 대중가요와의 차이점을 지니는 문화유산이다. 2) 민중가요 기록물의 유형을 확인하고 그 기록물의 유형에 부합하는 장기보 존체계는 OAIS 참조모형을 토대로 하였다. 3) 민중가요 기록물의 특성과 맥락성, 원질서를 존중하는 방안으로 메타데이터를 편집하여 OAIS 참조모형을 적용하였다. 4) 민중가요 기록물에 부합하는 정보패키지 메타데이터 요소를 도출하고, 이 요소들을 한국의 대표적인 민중가요인 '임을 위한 행진곡'에 적용하였다.

• 한국동물생명공학회지
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• 제36권4호
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• pp.299-306
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• 2021

Vitrification methods are commonly used for mammalian reproduction through the long-term storage of blastocyst produced in vitro. However, the survival and quality of embryos following vitrification are significantly low compared with blastocyst from in vitro production (IVP). This study evaluates that the survival of frozen-thawed bovine embryos was relevant to mitochondrial superoxide derived mitochondrial activity. Here we present supplementation of the cryopreservation medium with Mito-TEMPO (0.1 µM) induced a significant (p < 0.001; non-treated group: 56.8 ± 8.7%, reexpanded at 24 h vs Mito-TEMPO treated group: 77.5 ± 8.9%, re-expanded at 24 h) improvement in survival rate of cryopreserved-thawed bovine blastocyst. To confirm the quality of vitrified blastocyst after thawing, DNA fragmentation of survived embryos was examined by TUNEL assay. As a result, TUNEL positive cells rates of frozen-thawed embryos were lower in the Mito-TEMPO treated group (4.2 ± 1.4%) than the non-treated group (7.1 ± 3.5%). In addition, we investigated the intracellular ROS and mitochondrial specific superoxide production using DCF-DA and Mito-SOX staining in survived bovine embryos following vitrification depending on Mito-TEMPO treatment. As expected, intracellular ROS levels and superoxide production of vitrified blastocysts after cryopreservation were significantly reduced (p < 0.05) according to Mito-TEMPO supplement in freezing medium. Also, mitochondrial activity measured by MitoTracker Orange staining increased in the frozen-thawed embryos with Mito-TEMPO compared with non-treated group. These results indicate that the treatment of Mito-TEMPO during cryopreservation might induce reduction in DNA fragmentation and apoptosis-related ROS production, consequently increasing mitochondrial activation for developmental capacity of frozen-thawed embryos.

• 박물관보존과학
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• 제26권
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• pp.35-66
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• 2021

본 연구는 국립중앙박물관 소장 갑주(투구 2점, 갑옷 4점)에 대해 과학적 조사와 보존처리를 실시하고, 그 결과를 바탕으로 조선시대 중·후기 갑주의 구조적인 특징을 살펴본 것이다. 갑주는 유기물과 무기물이 함께 있는 복합 재질이므로, 보존처리는 각 재질의 안정한 조건이 서로 영향을 받지 않는 선에서 '조사·분석 → 오염물 제거 → 안정화 및 강화처리 → 손상 부위 보수 → 보관'의 과정으로 실시하였다. 갑주는 손상이 심한 상태였으나, 보존처리를 통해 안전한 보수 및 일부 부위의 복원을 완료하였다. 이 과정에서 확인된 내용을 바탕으로 조선 중기의 의상형 갑옷 일부(갑상)와 조선 후기의 포형 피갑, 조끼형 흉갑 그리고 투구에 사용된 재료 및 구조적 특징을 파악할 수 있었고, 이를 통해 제작 방법을 추정할 수 있었다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제27권4호
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• pp.7-14
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• 2021

Purpose: This study summarized architectural planning data for clinical practice spaces for CPX/OSCE and Simulation spaces, through analysis of domestic and foreign literature and a survey of domestic colleges of medicine. Methods: This study analyzed the architectural planning elements of the clinical practice spaces of the college of medicine, through a literature review on the clinical practice space and the survey of four recently established colleges of medicine. Results: ① It is desirable to plan the floor plan type for Simulation and CPX/OSCE spaces as a corridor-separated type that separates the circulations between students and staff (faculty). ② The simulation area arranges their practice rooms around the control space where the circulation of the staff is made. Conversely, it is desirable to arrange the CPX/OSCE rooms around the test waiting room where students enter. ③ It is desirable to separate access to the staff and students to allow student control, and to install various support spaces facing the staff corridor to secure the movement of equipment and the flow of evaluators. ④ In the simulation area, the equipment stored in the storage must be set in each room before the practice according to the setting of delivery or surgery like, and the equipment that has been removed must be back, so the circulation is short and does not intersect with the student circulations. ⑤ Debriefing rooms, seminar rooms, etc. are arranged in the staff area for review and discussion of clinical situations where practice and evaluation have been completed. Implications: It is important to configure an appropriate movement system and spatial zoning for each space for simulation and CPX/OSCE.

• Safety and Health at Work
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• 제13권1호
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• pp.23-31
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• 2022

Background: Potato is the main crop of Ardabil Plain (accounting for one-fifth of potato production in Iran). Its health hazard risk to farmers is rising due to the increasing rate of pesticide use. The present study analyzes potato farmers' health hazard risk in the use of chemical pesticides. Methods: The rate of pesticide use by farmers (n = 370) was first compared with the recommended dosage (on pesticide label). Then, a composite index was employed to estimate the health hazard risk of farmers during pesticide use, and the variables accounting for pesticide overuse and nonoveruse were analyzed. Safety behavior was examined in four steps, namely of pesticide purchase and storage, preparation, application, and postapplication. Results: It was found that 74.6 percent of potato farmers used pesticides in higher concentrations than the recommended dosage. The higher average rate of pesticide use versus recommendation (label instruction) was related to Chlorpyrifos and Trifluralin, and the highest average health hazard risk among farmers was related to the use of Chlorpyrifos and Metribuzin. Farmers with a higher risk of health hazard displayed much lower safety behavior than the other farmers at all steps of pesticide use. Conclusion: The most important variables discriminating the health hazard risk of farmers' overuse included health behavior identity, attitude, knowledge and awareness, and cues to action. Therefore, using social media, holding local exhibitions, and engaging local leaders and skilled farmers in the region to improve farmers' attitudes and health behavior identity toward the dangers of chemical pesticides can play a significant role in motivating farmers' display of overuse preventive behaviors.

• 한국IT서비스학회지
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• 제21권2호
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• pp.97-107
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• 2022

Recently, interest in smart factories is increasing. Investments to improve intelligence/automation are also being made continuously in manufacturing plants. Facility automation based on sensor data collection is now essential. In addition, we are operating our factories based on data generated in all areas of production, including production management, facility operation, and quality management, and an integrated standard information system. When producing LCD polarizer products, it is most important to link trace information between data generated by individual production processes. All systems involved in production must ensure that there is no data loss and data integrity is ensured. The large-capacity data collected from individual systems is composed of key values linked to each other. A real-time quality analysis processing system based on connected integrated system data is required. In this study, large-capacity data collection, storage, integration and loss prevention methods were presented for optimization of LCD polarizer production. The identification Risk model of inspection products can be added, and the applicable product model is designed to be continuously expanded. A quality inspection and analysis system that maximizes the yield rate was designed by using the final inspection image of the product using big data technology. In the case of products that are predefined as analysable products, it is designed to be verified with the big data knn analysis model, and individual analysis results are continuously applied to the actual production site to operate in a virtuous cycle structure. Production Optimization was performed by applying it to the currently produced LCD polarizer production line.

• Safety and Health at Work
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• 제13권1호
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• pp.117-125
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• 2022

Background: External-cause mortality is an important public health issue worldwide. Considering its significance to workers' health and inequalities across industries, we aimed to describe the state of external-cause mortality and investigate its difference by industry in Republic of Korea based on data for 2018. Methods: Data obtained from the Statistics Korea and Korean Employment Information System were used. External causes of death were divided into three categories (suicide, transport accident, and others), and death occurred during employment period or within 90 days after unemployment was regarded as workers' death. We calculated age- and sex-standardized mortalities per 100,000, standardized mortality ratios (SMRs) compared to the general population and total workers, and mortality rate ratios (RRs) across industries using information and communication as a reference. Correlation analyses between income, education, and mortality were conducted. Results: Age- and sex-standardized external-cause mortality per 100,000 in all workers was 29.4 (suicide: 16.2, transport accident: 6.6, others: 6.6). Compared to the general population, all external-cause and suicide SMRs were significantly lower; however, there was no significant difference in transport accidents. When compared to total workers, wholesale, transportation, and business facilities management showed higher SMR for suicide, and agriculture, forestry, and fishing, mining and quarrying, construction, transportation and storage, and public administration and defense showed higher SMR for transport accidents. A moderate to strong negative correlation was observed between education level and mortality (both age- and sex-standardized mortality rates and SMR compared to the general population). Conclusion: Inequalities in external-cause mortalities from suicide, transport accidents, and other causes were found. For reducing the differences, improved policies are needed for industries with higher mortalities.

• 창의정보문화연구
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• 제7권3호
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• pp.157-165
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• 2021

웹, 모바일, IoT 등의 기술을 활용한 다양한 어플리케이션 서비스의 활용과 이에 따른 대용량 데이터 관리의 필요성이 확대됨에 따라 효율적인 데이터 표현 및 교환 방법과 데이터에 대한 질의 처리의 중요성이 증가하고 있다. 간결함을 특징으로 갖는 JSON은 웹 상의 표준 데이터 표현 및 교환 언어인 XML를 대신하여 데이터 교환 및 대용량 데이터 저장의 포맷으로 다양한 영역에서 활용되고 있다. 이는 JSON으로 표현된 대량의 데이터를 효과적으로 접근 및 검색하기 위한 인덱싱 및 질의 처리 기법의 개발이 중요함을 의미한다. 이에 본 논문에서는 계층적 구조를 특징으로 가지는 JSON 데이터를 트리 형태로 모델링 하고 경로 개념을 이용한 인덱싱 및 질의 처리 방안을 제안한다. 특히, 텍스트 검색에서 널리 사용되는 접미사 배열을 활용한 인덱스 구조를 설계하였으며 이를 활용하여 단순 및 복합 경로 기반의 JSON 데이터 질의 처리 방안들을 소개하였다.

• 한국산업보건학회지
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• 제32권1호
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• pp.1-9
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• 2022

Objectives: The purpose of this study is to evaluate exposure characteristics of lead using data from the domestic occupational exposure literature. Methods: Occupational airborne exposure data on lead reported in the domestic literature from 1981 to 2018 were collected and re-analyzed. The exposure levels in the data were expressed as an estimated arithmetic mean and a weighted arithmetic mean (WAM) of the number of samples. Lead exposure characteristics were analyzed by industry, process, and year. Results: From a total of 14 documents, 8,305 airborne lead measurements for 17 industries were identified, and the WAM concentration in eight industries exceeded the occupational exposure limit of 50 ㎍/m³. Three industries (battery manufacturing, lead smelting, and litharge manufacturing) accounted for 95% of the total data, and exposure trends could be confirmed over 10 years. Exposure levels continue to decrease in all three industries. Conclusions: Considering the distribution outlook of lead and lead compounds, the main management targets are lead storage battery manufacturing and secondary smelting for lead regeneration.