PURPOSES : In this study, the main factors affecting the severity of traffic accidents among elderly drivers were reviewed, and accident factors with a high accident risk were analyzed. This provided basic data for preparing a traffic safety system for elderly drivers and establishing policies. METHODS : Based on machine learning, the major factors influencing accident severity (from the analysis of traffic accident data for elderly drivers) were analyzed and compared with existing statistical analysis results. The machine learning algorithm used the Scikit-learn library and Python 3.8. A hyperparameter optimization process was performed to improve the safety and accuracy of the model. To establish the optimal state of the model, the hyperparameters were set (K = 5) using K-fold cross-validation. The hyperparameter search applied the most widely utilized grid search method, and the performance evaluation derived the optimal hyperparameter value using neutral squared error indicators. RESULTS : The traffic laws, road sections of traffic accidents, and time zones of accidents were analyzed for accidents involving elderly drivers in Daejeon Metropolitan City, and the importance of the variables was examined. For the analysis, a linear regression model, machine learning-based decision tree, and random forest model were used, and based on the root mean square error, the random forest accuracy performance was found to be the best. Ultimately, 18 variables were analyzed, including traffic violations, accident time zones, and road types. The variables influencing the accident severity were the speed, signal violation, intersection section, late-night driving, and pedestrian protection violation, with the relative importance of the variables in the order of speed (0.3490966), signal violation (0.285967), and late-night driving (0.173108). These can be seen as variables related to the expansion of life damage owing to physical aging and reduced judgment abilities arising from decreases in cognitive function. CONCLUSIONS : Restricting the driving of the elderly on the expressway and at night is reasonable, but specific standards for driving restrictions should be prepared based on individual driving capabilities.

PURPOSES : Presently, it is impossible to evaluate the actual number of operational plans and punctuality of bus routes. In this study, a methodology for separating bus stops and sorting departure orders was developed using city bus operation information, and its field applicability was examined. METHODS : Based on current bus data, the "moving speed (km/h)," "Lag data," and "Lead data" were generated. The number of stops was classified based on the location where the order of the stops changed for each vehicle, and an arbitrary ID was assigned for each number of stops. In the case of a preceding vehicle, for each rotation information, a time interval was calculated based on the same point, and the rotation with the smallest time interval was determined as the preceding vehicle. RESULTS : An evaluation was conducted on Bus Route 201 in Daejeon. The vehicles were classified based on the operation data of the previous day. From analyzing the operation time and distance for each operation based on the last stop and starting point, it was found that both the number of operation plans and performance were consistent. The punctuality was analyzed and was found to be inversely proportional to the difference between the stop arrival time and preset arrival time, preset dispatch interval, and actual dispatch interval. The on-time(regularity) ratio was determined as 98.0% and the early departure ratio was 99.3%, indicating very good regularity. CONCLUSIONS : The research results can be used by local governments with insufficient levels of public transportation-based data management, and can be used as basic data for establishing public transportation policies. The results of this study can be referred to when evaluating the transparency of financial support for public transportation operators and operations, with the aim of enhancing public transportation services.

본 논문은 한·중관계가 크게 경색되는 2016년 사드(THAAD) 배치 이후 양국 지방 정부 간 교류가 어떻게 이루어졌는지 현황과 특징, 문제점을 분석하였다. 분석결과 사드 배치 이후 국가 관계가 크게 경색된 이후에도 양국 지방정부는 신규 교류를 체결하는 등 지속적인 교류 관계를 유지하고 있으며, 코로나19로 교류가 급감한 이후 에도 온라인 방식을 통해 교류를 지속하였다. 그리고 교류의 지속은 경색된 국가 관 계의 개선에 긍정적인 영향을 미칠 수 있다. 그러나 팬데믹 이후 물리적 교류의 감 소, 교류 대상 지방정부의 중첩성 문제, 교류 대상이 특정 지역에 치중되어 있다는 외형적 문제와 더불어 국제교류의 성과가 실질적이고 가시적이지 못하다는 점, 예산 사용에 관한 문제점 등이 한·중 지방정부 교류에 있어 중요한 문제로 지적된다. 지방 정부 국제교류가 국가 관계를 보완한다는 측면에서 향후 교류의 질적 제고를 위해서 이와 같은 문제들이 반드시 개선되어야 한다.

The effect of five different constant temperatures (18, 21, 24, 27, and 30±1°C) and a photoperiod of 14 : 10 (L : D) h on the reproduction parameters of Spodoptera frugiperda was studied. The longevity of adult female S. frugiperda decreased with increasing temperature (22.4 days at 21°C and 13.9 days at 30°C) but not at 18°C. The pre-oviposition period and oviposition period was the shortest at 30°C compared to the other temperatures. The total fecundity egg count was 887.4, 1,246.4, 1,348.9, 1,154.9, and 1,034.2 at 18, 21, 24, 27 and 30°C, respectively, during its life span. The survival rate of female S. frugiperda decreased rapidly after 13 days at 18°C, after 14 days at 21°C, after 15 days at 27°C, and after 9 days at 24°C, and 30°C. On the third day after the start of oviposition, 50% of the total fecundity was accomplished. In corn fields at less than the 10-leaf stage, the distribution of S. frugiperda egg masses was observed in the middle and lower plant regions, corresponding to 46.8% and 41.4% of the total egg masses, respectively. Egg masses were mostly found on the underside of the leaf blade (abaxial) of corn (66.7%). After releasing S. frugiperda adults on May 12, May 17, May 25, and May 30, the number of eggs per egg mass was 89.9, 88.5, 126.6, and 127.9, respectively. Egg masses of the subsequent generations of S. frugiperda were observed from late June, and the number of eggs per egg mass was 155.8 in late June, 270.7 in early July, and 303.5 in mid-July.

The purpose of this study was to breed a variety of stable productivity and high storage characteristics of white Hypsizygus marmoreus, which has high demand at domestic and global market due to a low bitter taste and the preference for white species. Accordingly, ‘Baekmaru’ was bred by hybridizing brown and white cap color species and backcrossing with white species. The ‘Baekmaru’ variety was bred by crossbreeding the brown and white species and backcrossing the white species. Through repeated cultivation of ‘Baekmaru’, a variety with a low contamination rate was selected when culturing the spawn for stable cultivation. As a results of demonstration test, the yield of ‘Baekmaru’ was 14% higher than that of the commercial variety. In addition, among the fruiting body characteristics of ‘Baekmaru’, diameter and thickness of the pileus were 16.43±15.27mm and 6.46±0.58mm, which were slightly higher than the commercial variety, and the hardness was 2.69±0.89N for the pileus and 3.09±0.89N for the stipe. The shelf life showed less change in thickness and color of pileus compared to commercial variety. The hardness of pileus of 'Baekmaru' was maintained in the range of 3.5 to 4.0N in the 4oC and 4oC and 20oC mixed treatment until 30 days of storage, and was higher than that of the commercial variety. Therefore, it was suggested to be excellent in storability.

To develop mushroom varieties for cultivating at low temperature on oak logs, a strain with a low fruiting body generation temperature was crossed with Di-mon to select for a line with excellent properties. Selection was followed by cultivation testing. From these studies, Heunghwa 1ho was identified. The optimum temperature for cultivating Heunghwa 1ho, was 13.3oC. The fruiting temperature range was 6.4~20.2oC, identical to that of the parent strain. Growth at 25oC for 7 days achieved optimal mycelial growth of 61.9±2.10 mm, superior to growth of the parent strain at this temperature. The cap shape of Heunghwa 1ho was convex, cap diameter was 57.8±8.31 mm, and cap color was brown. Heunghwa 1ho showed similar genetic traits to those of the parental strain. However, dry weight (20.1 kg/m3) and cap diameter and color are superior to those of the parent strain. The 3 year fresh oak mushroom yield was 113.8 kg/m3, superior to the respective yields of the parent strains JMI 10047 and JMI 90021 (92.5 kg/m3 and 66.4 kg/m3).

To optimize initial cooling conditions, forced-air cooling was applied to freshly harvested oak mushrooms at 2 levels (0oC for 30 minutes, at 0oC for 1 hour) followed by room cooling at 3 levels (-3oC for 1 day, 0oC for 1 day, 3oC for 1 day). After initial cooling, the oak mushrooms were packaged with PVC film, then held in a storage room at 1oC for 6 weeks. Quality characteristics and percentage marketability were then investigated. As a control, Mushrooms were placed in storage with no initial cooling. The quality factors impacting marketability of fresh oak mushrooms were color change and appearance of decay. Off-odor did not occur or developed only slightly, so it did not affect oak mushroom quality within 6 weeks of low temperature storage. In all treatment groups, the shelf life in which 100% marketability was maintained was up to 3 weeks. At week 5, percent marketability of the 3 treatment groups 1 hour room cooling treatment at 0°C, 1 hour forced air cooling, and control was 100%. 80% In the group that underwent 30 min forced air cooling retained 80% marketability, and the group exposed to 1 day in room cooling at -3oC retained 86.7% marketability. At week 6 of 1oC storage, the marketability ratio was 80% in the 1 day room cooling at 0oC group, 66.7% in the 1 day room cooling at 3oC group, 46.7% in the 1 hour forced air cooling group, and 33% or less in all other treatment groups. Therefore, the most suitable initial cooling parameter to extend shelf-life of oak mushrooms is 1 day of in room cooling at 0oC immediately after harvest.

As the importance of public health increases with the spread of infectious diseases, functionality has become a factor affecting consumers’ purchase of mushrooms. Therefore, the bioactive components of button mushrooms (Agaricus bisporus), which are generally known to promote button mushroom consumption, were analyzed. White and brown button mushrooms were compared and white beech mushroom (Hypsizygus marmoreus) were used as a control. White button mushrooms had higher sugar and inorganic potassium concentrations than brown button mushrooms, whereas sodium, magnesium, and vitamin C concentrations were not significantly different between the different button mushrooms. Moreover, there was approximately twice as much ergosterol in white button mushrooms than brown button mushrooms. Brown button mushrooms had higher concentrations of β-glucan and oxalic acid than white button mushrooms, but there was no significant difference in total organic acid content between the two mushroom types. High concentrations of the essential amino acids, ergothioneine, isoleucine, and leucine and the non-essential amino acids, glycine and alanine, were observed. Concentrations of the vitamin B group and total polyphenols were also high.

This study was conducted to investigate the growth and antioxidant activity of Pleurotus ostreatus mycelia grown in medium supplemented with Aronia. The diameter and dry weight of the mycelia were increased in the medium supplemented with Aronia compared with the untreated medium. The total polyphenol content of mycelia grown in medium supplemented with Aronia and untreated medium was 6.54 mg GAE/g and 5.77 mg GAE/g, respectively. The 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity of mycelia grown in medium supplemented with Aronia and untreated medium was 61.81% and 49.65%, respectively. Moreover, the 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) radical scavenging activity of mycelia grown in medium supplemented with Aronia and untreated medium was 59.83% and 52.66%, respectively. These results confirmed that P. ostreatus mycelial growth and antioxidant activity were increased when Aronia was added to the culture medium.

While protecting its lives and property from natural disasters such as floods and droughts, North Korea needs to develop into an informationized industrial society by securing renewable energy power in the era of energy transition. In addition, existing research has considered that a policy of continuous and consistent expansion of renewable energy based on the safety of the lives of ordinary people could be the solution. South Korea needs to recognize that the supply of energy for a minimum of living is more important to the North Korean people than the economic benefits of securing North Korea's renewable energy market. Therefore, in this paper, from that point of view, we have calculated the amount of electricity that North Korea lacks necessary for the lives of its inhabitants that can be replaced by renewable energy, and considered ways to estimate the market value.

목적 : 본 연구는 문화적, 사회적, 환경적 특성이 반영된 초등학생들의 작업수행활동 항목을 도출하여 아동 평가 및 부모 상담 시 유용하게 사용할 수 있도록 작업수행활동 평가도구를 개발하기 위한 기초를 제공 하고자 시행하였다. 연구방법 : 문헌 조사를 통해 수집된 항목 분류 및 평가도구의 항목 중 총 645개의 활동 항목을 수집하여 최종 46개의 항목을 선정하였다. 이후 작업치료실행체계-Ⅲ(Occupational Therapy Practice Framework- Ⅲ; OTPF-Ⅲ의 작업 범주와 생활시간조사(2014)의 행동분류를 기준으로 기초 항목 도출 과정을 거쳐 작업치료사 16명, 초등학교 교사 16명, 작업치료학과 교수 8명, 총 40명의 전문가를 대상으로 3차례의 델파이 조사를 시행하여 최종 항목을 선정하였다. 조사도구로는 리커트 척도인 구조화된 질문과 개방형 질문이 혼합된 설문지를 사용하였다. 결과 : 델파이 조사를 통해 수거된 설문지의 응답을 토대로 항목의 적합성을 항목별 중요도, 안정성, 내용 타당도(Content Validity Ratio)로 확인하였고 개방형 질문에 대한 의견을 수렴하여 항목의 삭제, 수정 및 추가 여부를 결정하였다. 이후 OTPF-Ⅲ 작업 범주의 4개 영역, 생활시간조사 행동분류의 7개 영역 에 따라 작업수행활동 29개의 항목을 추출하고 분류하였다. 결론 : 본 연구를 통해 문화적, 사회적, 환경적 배경이 반영된 국내 초등학생의 작업 수행 활동은 29개 항 목으로 최종 도출되었다. 본 연구결과를 바탕으로 향후 임상 작업치료사들이 의미 있는 작업 목표 선정 을 위한 활동평가 도구개발에 활용하고 부모 면담 시 간편하고 유용하게 사용하기를 기대한다.

본 연구는 첫째, 중국의 온라인 교육 시장 진출 모색을 위해 중국내 온라인 영어 교육 플랫폼 현황을 살펴보고, 둘째, 시진핑 정부의 ‘쌍감’ 정책 중 사교육 정책 시행 배경과 내용 및 추가 관련 정책을 면밀히 검토해 보았으며, 셋째, 관련 정책 시행 후 온라인 영어 교육 기업에 어떤 영향과 변화가 있었는지 구체적으로 분석해 보았다. 분석의 결과 정책 시행 후 중국 온라인 교육서비스 기업들은 운영에 있어 중국 당국 의 엄격한 통제를 받았으나, 이것이 기업에게 부정적인 영향만 준 것은 아니며 더욱 세분화된 시장 안에서 다양한 대상과 규정에 맞는 콘텐츠로 운영한다면 기회의 요인 이 될 수 있을 것임이 확인되었다. 본 연구의 분석 내용과 시사점들은 향후 우리나 라 온라인 교육 서비스 기업의 중국 진출 및 경쟁에 있어 일조할 수 있을 것으로 기 대된다.

목적 : 본 연구는 전국 일반계 고등학교 재학생 1, 2, 3학년들을 대상으로 작업치료 인식도 조사를 실시하 여 학년별 작업치료 인식도를 확인하고, 그에 따른 학과 탐색의 시기를 파악하는 데에 목적이 있다. 이 를 통해, 작업치료의 인식도를 향상시키도록 하는 효율적인 홍보방안을 제시하고자 한다. 연구방법 : 전국 17개 지역의 일반계 고등학생들을 대상으로 2021년 11월 22일부터 12월 5일까지 알게 된 경로, 최소한의 교육과정, 국가고시 필수 여부, 대상자의 연령대, 업무 범위, 취업처와 같은 작업치료 인식도와 작업치료(학)과 지원 및 홍보 방법에 대한 질의와 응답으로 구성된 N사의 온라인 설문지 공유 를 통해 실시하였다. 수집된 설문지 총 860부 중 부적절한 응답 153부를 제외한 707부를 분석하였다. 수집된 자료 처리 및 분석은 기술통계량을 이용한 빈도분석을 실시하였다. 결과 : 고등학생의 작업치료 인식의 수준은 48.9%로 나타났다. ‘작업치료 대상자의 연령대’를 학년별로 구 분하여 분석한 결과, ‘모르겠다’를 선택한 비율이 1학년 177명(32.2%), 2학년 157명(30.3%), 3학년 84명(23.6%)으로 학년이 높아질수록 낮아지는 것으로 확인되었으며 학년별로 분석한 다른 작업치료 인 식도 항목 또한 같은 결과를 보였다. 고등학생이 희망하는 학과 홍보 방법으로는 ‘Social Network Service(SNS)홍보 게시물’이 26.2%로 가장 높게 나타났다. 결론 : 일반계 고등학생은 학년이 높아질수록 작업치료 인식도가 높아졌다. 이는 고등학생들이 진로를 위한 학과 탐색을 통해 높아지는 것으로 추론할 수 있으며, 충분한 탐색의 시간을 제공하기 위해 고등학생이 희망하 는 학과 홍보 방법인‘SNS 홍보 게시물’을 활용하면 작업치료 인식개선 등의 효과적일 것이라 사료된다.

Soybeans are used for various purposes as a major source of protein, carbohydrates, and fat. This study was conducted to investigate the component changes in protein, amino acid, and antioxidant substances with different sowing periods by soybean varieties, as climate warming accelerates in recent years. The content of isoflavone according to early sowing did not differ by sowing period. However, it was confirmed that the content of isoflavone was higher in functional soybean cultivars such as Cheongja-5 having blue color at seed inside, Pungsan and Sowon used soybean sprouts, and Jinyang without fishy smell. There was no significant difference in the changes in protein and amino acid content according to the sowing time by soybean cultivars. The protein and amino acid content by early sowing tended to be lower than that of timely sowing. In most varieties except for some varieties, the content of proline was the highest by early sowing, confirming the presence of stress due to early sowing.

본 연구과제는 아시아지역 AFACI(Asian Food & Agriculture Cooperation Initiative) 회원 13개국을 대상으로 토마토 또는 고추 품종육성 기술을 지원하기 위해 수행 되었다. AFACI 회원국 별 채소 육종 및 종자 생산, 가공, 유통 기술 수준 차이가 크다. 라오스, 미얀마, 캄보디아 등의 회원국에서는 자가 종자 생산이 어려워 필 요 종자의 70~80%를 다른 나라에서 수입하여 활용하고 있다. AFACI 회원국들의 자가 종자 생산기술 향상을 통한 자체 종자 생산을 지원하기 위해 회원국들의 요 청을 받아 고추 또는 토마토 작목의 품종육성 기술지원을 수행하였다. 회원국에서 보유하고 있는 다양한 재래종 자원들의 수집, 평가 및 선발과 세계채소센터에서 육성한 자원들을 공급받아 육종 재료로 활용하였다. 본 과제는 2019년 11월부터 2022년 10월까지 1단계 과정을 통해 회원국별로 다양한 성과들을 창출하고 있다. 효율적인 기술지원을 위해 세계채소센터 전문가들을 활용하여 육종 기술과 재료 들을 공급하였다. 2단계에서는 1단계에서 확보된 다양한 자원들을 활용한 우수 고 정종 품종 등록과 일대잡종 품종육성 기술을 지원할 계획이다. 육성된 품종들은 국가별 품종 등록 절차에 따라 품종보호출원 및 농가 보급을 추진할 계획이다. 1 단계에서는 코로나 19로 인한 대면 교육이 불가능하여 국내 종자회사들과의 소통 이 어려웠다. 하지만 2단계에서는 대면 교육 기회를 확대하고, 국내 채소 종자 업 체와 회원국의 연구원들 간의 소통을 확대하여 국내 종자 기업들의 해외 진출에 도 기여 할 수 있도록 노력할 계획이다.