Major accidents at nuclear power plants generate huge amounts of radioactive waste in a short period of time over a wide area outside the plant boundary. Therefore, extraordinary efforts are required for safe management of the waste. A well-established remediation plan including radioactive waste management that is prepared in advance will minimize the impact on the public and environment. In Korea, however, only limited plans exist to systematically manage this type of off-site radioactive waste generating event. In this study, we developed basic strategies for off-site radioactive waste management based on recommendations from the IAEA (International Atomic Energy Agency) and NCRP (National Council on Radiation Protection and Measurements), experiences from the Fukushima Daiichi accident in Japan, and a review of the national radioactive waste management system in Korea. These strategies included the assignment of roles and responsibilities, development of management methodologies, securement of storage capacities, preparation for the use of existing infrastructure, assurance of information transparency, and establishment of cooperative measures with international organizations.

목적 : 한국실명예방재단에서 발표한 사업보고서를 기초로 약시의 진단 및 원인, 치료 그리고 치료 결과에 대한 데이터를 분석하고자 한다. 방법 : 눈 건강증진 사업인 ‘취학 전 어린이 실명예방사업 보고서’ 중 2016년에서 2020년 최근 5년간의 보고서 내용 중 약시와 관련된 결과들을 분석하였다. 결과 : 약시 진단 및 원인으로 평균 50.87±3.97%로 절반 이상이 병원에서 약시를 확인하였으며, 평균 51.50±2.48%로 국내 약시안의 절반 이상이 굴절이상으로 인한 약시가 가장 큰 원인으로 나타났다. 약시 치료 기간은 1년 이하가 평균 54.42±9.27% 약시안의 절반 이상이 1년 이내에 치료가 완료된 것으로 나타났으며, 안 경 착용과 차폐를 병행한 방법이 평균 51.05±3.85%로 나타나 가장 많이 사용되고 있는 치료법이였다. 평균 68.86±13.13%가 시력이 향상되었으며, 치료 종결된 약시안은 31.98±23.53%를 보였다. 치료에 방해가 되는 원인에서는 아이의 치료거부가 42.34±3.76%로 가장 큰 이유로 나타났다. 결론 : 약시의 치료에 있어 가장 기본이 되는 것으로 시력이 가장 중요한 요소이며, 시력 향상을 유지하기 위해 서는 정확한 굴절검사를 바탕으로 한 안경교정 함께 정상적인 양안시를 유지하도록 하는 것이다. 국내 약시의 상 황을 정확하게 분석하기 위해서 본 연구를 기초로 앞으로 국내 약시의 지속적인 연구가 필요할 것으로 보인다.

목적: 코로나19 상황에서 일부 안경사를 대상으로 콘택트렌즈 관리 지식 및 관리 교육의 실천 수준을 알아보고, 코로나19 감염예방을 위한 기초 자료를 제공하고자 하였다. 방법 : 2021년 3월부터 6월까지 국내 안경원에서 1년 이상의 근무 경력을 가지고 있는 122명의 안경사를 대 상으로 온라인 설문지를 이용하여 진행하였다. 대상자의 성별은 남자가 75명, 여자가 47명이었으며 평균 연령은 29.80±6.92세였다. 연구 도구는 대상자의 일반적 특성과 코로나19에 대한 지식(0~2점) 및 코로나19 상황에서 콘택트렌즈의 관리에 관한 지식(0~2점), 그리고 감염예방을 위한 관리 교육의 실천(0~3점)에 대한 항목으로 총 27문항의 설문지를 이용하였다. 결과 : 대상자들의 코로나19 지식의 평균 점수는 1.61±0.30점, 콘택트렌즈 관리에 대한 지식의 평균 점수는 1.69±0.29점, 관리 교육의 실천은 2.45±0.45점이었다. 코로나19의 지식에서 ‘코로나19의 증상’(1.93±0.34점) 문항이 가장 높은 지식수준을 보였고, ‘코로나19의 병원체는 SARS-CoV-2’(1.18±0.70점)에서는 가장 낮은 점 수를 보였다. 콘택트렌즈 관리에 관한 지식 문항에서는 ‘코로나19 상황에서 콘택트렌즈 세척과 헹굼은 필수적인 관리지침’(1.98±0.13점)에서 가장 높은 점수를 보였다. 실천 문항에서는 일반적인 콘택트렌즈의 관리 수칙은 잘 지키고 있었지만 ‘독감, 발열, 기침 등의 증상이 있으면 렌즈 착용을 중단하도록 교육한다’(1.71±1.10점)에서는 낮은 수준을 보였다. 결론 : 코로나19 상황에서 일부 안경사들의 일반적인 콘택트렌즈 관리 수칙은 높은 지식 및 실천 점수를 보였 으나, 일부 항목은 낮은 점수를 보여 감염예방을 위한 전문적인 항목의 개발과 교육이 필요하다고 생각된다.

The successful implementation of green supply chain management(GSCM) practices requires a level of cooperation that can be difficult to conduct. Despite this challenge, limited scholarly attention has been paid to exploring how the implementation of GSCM practices can be effectively facilitated and enhanced through accumulated social capital with suppliers. Based on social capital theory, this study postulates that supplier network characteristics derived from social capital with key suppliers can be critical antecedents of GSCM, which in turn enhances the firm’s environmental performance. To test hypotheses, data were collected from 330 firms in 15 countries, and structural equation modeling was employed. Results show that GSCM improves environmental performance, and structural and cognitive social capitals of the supplier network act as antecedents and lead to GSCM implementation.

Most of the prior studies on the servitization of manufacturing companies have been actively studied, focusing on the performance and cases of servitization at the single company level. According to the results, most of the servitization at the single company level has been expanded based on the relevance of the company’s core products. However, the form of companies that form a large axis of the Korean economy is a large-scale business group, and these business groups incorporate service affiliates for various purposes, so they show different characteristics from that of a single corporate. In addition, since the purpose of forming a business group is different for each business group, the service relevance between affiliates within the business group is different. Therefore, this study aims to examine the effect of service relevance between affiliates within a business group on the management performance of each business group. To this end, an empirical analysis will be conducted using panel data for 10 years from 2011 to 2020 for a total of 98 affiliates listed on KOSPI and KOSDAQ of 9 domestic business groups. Based on these results, the direction for improving management performance and establishing future servitization strategies for large business groups in Korea will be expected to be made.

Urban space expansion is an important symbol of the urbanization process and has always been an important topic in urban studies. In addition, for sustainable city management, it is important to identify factors that can influence, such as the driving force and direction of urban space expansion, from the stage of establishing an urban development plan. To understand these factors, by observing the expansion process of a specific city, it is possible to sufficiently observe how the urban spatial dimension changes. Through a series of processes, the spatial growth characteristics of the city are analyzed, and the influence and results of important factors are analyzed. For this purpose, this paper examines the changes in the city's outer boundary and land use structure through monitoring data on urban areas of 14 cities in Hunan Province, China from 2000 to 2016. Temporal and spatial regularity according to the urban space expansion of these cities were analyzed, and a preliminary assessment was made on whether the urban space expansion is coordinated with the urban population growth. The assessment result showed: (1) The urban space of most cities has been extended rapidly in 2000-2015 however, the rate and the intensity of urban space expanding has been declining. (2) The construction of the industrial park is the core driving force of the urban space expanding, and the change of the urban space structure is manifested as enclave city expansion because that the industrial park is usually far away from the city center. (3) The population agglomeration is another driving force of the urban space expanding. At this time, the urban space expanding is like boundary extension. (4) Except Changsha city, all of the cities has a high urbanization-area-growth elastic coefficient. It means that most of the cities should enhance the land use degree.

Paspalum distichum and P. distichum var. indutum are perennial weeds of the family Poaceae that prefer moist environments such as waterfronts and waterways. The origin of both species is North America. P. distichum is distributed all over the world. However, P. distichum var. indutum occurs only in the United States, Japan, and Korea. For this reason, in many countries, P. distichum and P. distichum var. indutum are classified as the same species. In other words, P. distichum var. indutum is a different ecological type of P. distichum. Both species can reproduce and spread mainly by rhizome fragments rather than seeds. This rhizome has a characteristic that it does not germinate if it is buried in the ground with depth of more than 3 cm. As a management method for P. distichum and P. distichum var. indutum in agricultural lands (paddy fields), it is effective to combine cultural control and chemical control methods. In other words, combining deep plowing and harrowing can suppress the budding of water sparrow that has invaded paddy fields or fallow paddy fields. After that, these two species that germinate can be controlled by spraying soil treatment herbicides such as butachlor and thiobencarb or foliar treatment herbicides such as cyhalofop-butyl and fenoxaprop-pethyl.

Lactuca scariola L. is one of ecosystem-disturbance plants that grow everywhere such as roadsides, grasslands, railroads, banks, and fields. L. scariola usually occurs in autumn. It overwinters in rosette form. It flowers and produces seeds in early summer of the next year. Seeds of L. scariola can germinate immediately without dormancy when the temperature is over 20°C. Due to endogenous bacteria in seeds of L. scariola, it has a strong drought tolerance. Thus, it can grow well on roadsides. L. scariola should be controlled as it can result in 60-80% of soybean yield loss at densities above 50 plants m-2. It is advisable to remove L. scariola as it competes with native plants by acting as a pioneer to other ecosystem-disturbance plants. Among various control methods, chemical control is the most effective method that is widely used. Soil treatment with herbicides such as oxyfluorfen EC and pendimethalin EC can inhibit the development of L. scariola. Foliar treatment herbicides glyphosate and glufosinateammonium are widely used. L. scariola is resistant to 2,4-D, dicamba, and MCPA among foliar treatment herbicides. Thus, it is recommended to apply herbicides with different modes of action.

이 글은 옥천 이성산성의 고고학적 조사 성과에 기초하여 그 축성과 운영의 특징을 간략 하게나마 살펴보고자 하였다. 이성산성은 삼국시대 신라의 굴현 지역인 옥천군 청산면과 청 성면 일대를 아울러 관리하기에 매우 유리한 위치에 축성하였다. 그리고 가까이는 신라 삼 년산군인 보은 지역, 나아가 영남 중북부 지역과의 교통이 용이한 지점에 위치한다. 이성산성의 초축 성벽은 판축기법을 적용하여 토축성벽으로 축조하였으며, 후대에 지속 적으로 수개축되었다. 특히 초축성벽인 토축성벽 외측에 부가하여 석축으로 성벽의 입면을 이루도록 개축한 부분은 매우 특징적인 모습이다. 성 내부에 대한 조사는 남서쪽 지역 일대 를 중심으로 이루어졌다. 여기에서 확인된 목곽고, 원형수혈군, 석축 집수시설 등은 성 내부 에 각각의 용도와 기능에 따른 다양한 시설물이 조성되었음을 보여준다. 각 유구에서는 주 로 6~7세기의 신라 토기와 기와 등이 출토되어, 축성 주체가 삼국시대 신라임을 분명하게 알 수 있다. 특히 저장시설로 추정되는 목곽고와 원형수혈군의 존재는 이성산성이 수행한 역할과 관련하여 의미있는 자료로 여겨진다. 이성산성의 축성 위치와 성 내부에서 확인된 유구의 성격을 통해 성은 신라가 5세 기 후반 소백산맥을 넘어 금강 유역으로 진출하는 과정에서 삼년산군 아래 굴현 지역 을 관할하는 중심 거점으로 역할하기 위해 축성한 성으로 보았다.

This study examined the certification effects of safety and health management system (SHMS) on the establishment level of SHMS and accident statistics in construction industry. This study obtained the establishment level of SHMS for 106 construction companies surveyed from our previous study. In addition, three major accident statistics (mortality rate, accidental mortality rate, and injury rate) for the companies were collected from the database in Korean Occupational Safety and Health Agency. The statistical analysis results revealed that the establishment level for SHMS certified companies was significantly higher than those for uncertified or certification preparing companies. Furthermore, SHMS certified companies showed significantly smaller accident statistics compared to uncertified or certification preparing companies. The results of this study support the positive effects of SHMS on reducing major industrial accidents in construction companies.

Maize is an important cereal crop widely grown in all of Nigeria’s agroecology based on its economic and food values. This has led to its optimum production with Nigeria ranking top 12th maize producer in the world. Presently, the fall armyworm (FAW), Spodoptera frugiperda is considered a potential threat to food security in Nigeria due to its devastating feeding pattern on maize and its wide host range. Its invasive and high dispersal nature enhances its spread from its first reported state (Oyo) in early 2016 to the entire 36 states of Nigeria by the year 2018. It accounts for averagely an estimated 34% or more yield reduction in Nigeria’s maize field, hence, a need for an efficient management approach. Although most farmers rely on the use of insecticide, it is found ineffective because of the inaccessible location of FAW in maize. This study was carried out to investigate the different management approaches adopted in Nigeria to control FAW and its impact on the insect pest population. Conventional measures such as planting improved seeds, avoidance of late planting, and polyculture to increase the natural enemy’s population have been used but with limited control of FAW. Maize lines with aflatoxin resistance or transgenic Bt-maize are found resistant to FAW. Botanicals such as neem extract lowered the percentage of leaf area damage, incidence of FAW larva infestation, and the number of larvae. It is difficult to curtail the menace of FAW through one control method, hence, the need for an integrated approach