본 연구는 난대상록수종인 종가시나무에 대한 수간곡선식의 도출과 재적표의 작성 및 탄소배출계수를 이용하여 탄소저장, 흡수량을 추정하고자 수행하였다. 분석에 사용된 공시목은 전남, 경남, 제주 등에서 수집된 468본이며, 수간형태를 도출하기 위하여 적용한 수간곡선 모형은 Kozak 모델이다. 이 모델의 적합도는 0.9452, 편의는 0.0807, 추정치 표준오차의 백분율은 1.7145, 평균절대편차는 1.2655로 각각 나타났다. 종가시나무의 개체목 재적은 Kozak 수간곡선 모델에 Smalian 재적식을 적용시켜 산출하였으며, 수고와 흉고직경급별로 재적표를 작성하였다. 그리고 붉가시나무 재적표와 이번에 만든 종가시나무 재적표를 서로 비교한 결과(t-test), 통계적으로 두 집단 간에 차이가 없는 것으로 나타났다. 따라서 이들 재적표는 두 수종 중 하나만 이용하거나, 둘을 하나로 통합하여도 문제가 없을 것으로 판단된다. 한편 종가시나무림의 탄소저장 및 흡수량은 산림바이오소재연 구소 시험림의 조사구를 대상으로 하였다. 이들 조사구를 대상으로 탄소저장 및 흡수량을 계산한 결과, 생육상태가 양호한 시험구(A)에서 탄소저장량 은 93.17 C ton/ha, 그리고 탄소흡수량은 13.14 CO2 ton/ha/yr 인 것으로 나타났다. 반면에 생육이 저조한 시험구(B)의 탄소 저장 및 흡수량은 양호한 시험구보다 약 1/3 정도 낮게 나타났다.

Recently, the government has provided support such as entering new markets, expanding sales channels, and supporting manpower, not just in the form of funding, to efficiently and effectively support limited national resources to improve corporate performance. In this study, we tried to find out the effect of government support for companies that have benefited from the Excellent Technology Research Center Project (ATC Project) and the World Class 300 project using propensity score matching. As a result of the analysis, the effect of government support for the ATC project became visible after the appointment period, while the effect of the World Class 300 project was insignificant. This means that when the size of the company is small, the effect of government support is more pronounced. This suggests that in order to maximize the effectiveness of government support, appropriate national policy interventions such as government innovation funding are needed when the size of the company is small. In this study, differences in the timing, performance indicators, and company size of policy support effects were found in the growth stage of a company from a mid- to long-term time series perspective, suggesting that support policies based on this need to be adjusted and redesigned.

PURPOSES : This study aims to analyze and summarize test results related to permeable blocks used for sidewalks and roadways as an alternative to conventional urban road pavement technology, specifically focusing on low-impact development (LID) techniques. Furthermore, it aims to provide reference data on the feasibility of current policy implementation and future policy directions through a longterm analysis of the performance and durability of permeable blocks in sidewalk and roadway construction. METHODS : The research methodology involves (1) conducting a survey on the status and actual conditions of permeability sustainability tests based on the results of permeability persistence tests conducted in Seoul over nine years, from 2013 to 2021; (2) analyzing the differences between the permeability block rating system of Seoul City and that employed by the Ministry of Environment; (3) analyzing the permeability of graded pavement sections in permeable blocks for sidewalks after three years of public use and deriving a regression analysis formula to estimate the maintenance period; (4) analyzing the permeability of pavement sections in permeable blocks for roadways after five years of public use and deriving a regression analysis formula to estimate the maintenance period. RESULTS : This study revealed significant improvements in the performance and quality control of permeable blocks since the implementation of the permeability sustainability test in Seoul in 2013. An analysis of the differences in the permeability coefficient and distribution based on the rating systems of Seoul City and the Ministry of Environment showed that rating system of Seoul City has approximately twice the permeability coefficient quality standard compared to that of the Ministry of Environment. Regression analysis indicated that the firstgrade permeable block was predicted to maintain its permeability for approximately 5.1 years, whereas the third-grade permeable block was predicted to maintain its permeability for approximately 3.1 years. In roadway-permeable block pavements, the first-grade sections maintained excellent quality conditions even after five years, and regression analysis predicted a permeability maintenance period ranging from eight to 17 years. CONCLUSIONS : The correlation analysis of the permeability coefficients based on the common usage period of permeable blocks for sidewalks and roadways presented in this study can provide more accurate estimations of commonality. However, further research under various environmental conditions is required to supplement these findings. Considering the lack of studies on permeable block commonality analysis in Korea, this study highlights the significance of conducting long-term experimental follow-up research to establish commonality prediction formulas for different usage scenarios.

The effects of punching treatment on mycelial culture and fruiting body productivity were investigated in a new Lentinula edodes cultivar, “Jadam”, in sawdust medium for the stable production of oak mushroom. As the punching volume and number increased, the weight loss rate and color difference increased and the L value decreased. After spawn inoculation, the sawdust medium temperature and CO2 concentration reached their highest values at 33 and 19 days of incubation, respectively. The O2 concentration showed the lowest value on the 14th day of incubation, which was the opposite pattern to the CO2 concentration. As the punching volume and the number increased, the medium temperature and O2 concentration increased, and the CO2 concentration decreased. Higher punching volumes and numbers resulted in higher temperatures and lower CO2 concentrations. The best fruiting body yield was 5 × 70 mm - 30 (punching diameter × depth - number), and the total yield after three cycles was 644.7 g.

A new spore-less cultivar Lentinula edodes ‘Daedam’ was bred from monokaryotic strains of ‘LE15401-24’ and ‘LE192118-10’. The optimum temperature for mycelial growth of ‘Daedam’ on potato dextrose agar was 22~25oC. Total cultivation period of the new cultivar, from inoculation to its first harvest, was 134 days, similar to that of the control cultivar ‘Hwadam’. Total yield of ‘Daedam’ was 222g per 3kg substrate, and was lower than that of control cultivar(266.0g). The fruiting body of ‘Daedam’ had a thick and small pileus and a longer stem compare to control cultivar. As a result of a analyzing the productivity of ‘Daedam’ on the different substrate types, the biological efficiency was 26.7% in the 1.2kg cylindrical substrate(CS), which was higher than that of the 3kg rod-type substrate(RS). 'Daedam' had a similar yield compared to 'Hanacham' in first fruiting body production, but the cultivation period was 40 days shorter. Therefore, 'Daedam' can only harvest fruiting bodies once, it is thought that it can be used as spore-less oak mushroom cultivar for short-term cultivation instead of 'Hanacham' in mushroom farms.

This study was conducted to reduce the phenomenon of the biased cultivation of certain mushroom varieties and to develop a competitive variety of Pleurotus nebrodensis. We have collected and tested characteristics of genetic resources from domestic and overseas varieties since 2015. We bred the domestic variety ‘Boram’. The optimal temperature was 26~29oC for mycelial growth and 15~18oC for fruit body growth temperature. This variety was similar to the control variety (Uram) in terms of the number of cultivation days and yield per bottle. The shape of the new cultivar was round, whereas that of the control group was spatula-like. The yield was 181.1 g/bottle, which was statistically similar to that of the control variety. When incubating the parent and control varieties, the replacement line was clear. Moreover, polymerase chain reaction analysis of mycelial DNA resulted in different band patterns between the parent and control varieties, confirming the hybrid species.

This study uses FMECA (Failure Modes, Effects, and Criticality Analysis) and HAZOP (Hazard and Operability), which are widely applied in industrial areas, among risk assessment methods, and applies them to the same system. While FMECA evaluates system failure conditions and analyzes risks, HAZOP evaluates the system comprehensively by evaluating operational risks that may occur based on system parameters. According to data released by the Ministry of Land, Infrastructure and Transport, as of December 2021, the length of roads in Korea is 113,405 km, and the repair of guardrails that have expired must be fixed urgently in terms of traffic safety. Replacing all of these guardrails with new ones requires a very large cost, but if the guardrails are repaired with a vehicle equipped with the G-Save method, carbon emissions are reduced, the repair period is shortened, and great economic benefits can be obtained. However, risk assessment for guardrail coating vehicles has not been done so far. Focusing on this point, this study aims to evaluate the risk of these coating vehicles and describe the results. Finally, we found that the Risk Priority Numbers(RPN) in the FMECA risk assessment were greatly reduced, and 6 risk factors from HAZOP risk assessment and actions were taken.

본 연구에서는 복숭아혹진딧물의 포식 기생자인 콜레마니진디벌의 기능반응을 조사하였다. 이산화탄소 농도별(400, 600, 1000ppm) 복 숭아혹진딧물 밀도를 달리하여(2, 4, 8, 16, 32, 64, 128마리) 콜레마니진디벌 한 마리를 24시간 동안 노출시켰다. 각 이산화탄소 처리에서 콜레 마니진디벌은 제 3 유형의 기능반응을 보였다. 600 ppm (0.015 day)과 1000 ppm (0.014 day)에서 추정된 처리시간은 400 ppm에서 추정된 결 과(0.017 day)보다 짧았다. 이산화탄소 농도별 복숭아혹진딧물 기생률은 유사한 특징을 나타내었다. 가장 높은 기생률은 400, 600, 1000 ppm 에서 복숭아혹진딧물 16, 32, 32마리에 대해 0.57, 0.61, 0.70이었다. 이산화탄소 농도 증가는 콜레마니진디벌의 기능반응에서 공격율에는 영향 을 주지 않았지만 처리시간에는 영향을 주었다.

본 연구는 발달장애아동을 대상으로 케어로봇을 치료에 활용하기 위해 발달장애 아동의 부모를 대상으로 소셜로봇이 갖추어야 할 기능과 요구 등을 분석하고자 시행한 질적연구이다. 연구대상자는 자녀 가 발달장애 진단을 받았거나 1년 이상 특수교육을 시행하고 있는 만 18세 미만 자녀를 둔 주양육자 11명 을 대상으로 진행하였다. 면담질문지는 반구조화된 질문지로 구성하여 소셜로봇에 대한 인식, 필요성, 기 대, 염려 및 기타 의견 등으로 구성하였다. 면담은 COVID 19로 인해 비대면 온라인 화상 면담으로 이루어 졌다. 연구결과, 4개의 주제가 도출되었다. 4개의 주제는 낯설지만 곧 마주할 현실, 능동적인 기능이 탑재 된 소셜로봇, 소셜로봇의 외형과 재질에 대한 바람 및 소셜로봇에 대한 염려로 도출되었다. 본 연구를 통하 여 양적연구에서는 파악할 수 없었던 주양육자의 소셜로봇에 대한 기대, 제안 등을 파악할 수 있었고 이를 향후 개발할 소셜로봇에 반영할 수 있다면 보다 수용성이 높은 긍정적인 결과를 도출 할 수 있을 것으로 기대한다.

원자력발전소 지진 확률론적 안전성 평가인 PSA(Probabilistic Safety Assessment)는 오랜 기간에 걸쳐 확고히 구축되어 왔다. 반면 에 다양한 공정 기반의 산업시설물의 경우 화재, 폭발, 확산(유출) 재난에 대해 주로 연구되어 왔으며, 지진에 대해서는 상대적으로 연 구가 미미하였다. 하지만, 플랜트 설계 당시와 달리 해당 부지가 지진 영향권에 들어갈 경우 지진 PSA 수행은 필수적이다. 지진 PSA 를 수행하기 위해서는 확률론적 지진 재해도 해석(Probabilistic Seismic Hazard Analysis), 사건수목 해석(Event Tree Analysis), 고장수 목 해석(Fault Tree Analysis), 취약도 곡선 등을 필요로 한다. 원자력 발전소의 경우 노심 손상 방지라는 최우선 목표에 따라 많은 사고 시나리오 분석을 통해 사건수목이 구축되었지만, 산업시설물의 경우 공정의 다양성과 최우선 손상 방지 핵심설비의 부재로 인해 일 반적인 사건수목 구축이 어렵다. 따라서, 본 연구에서는 산업시설물 지진 PSA를 수행하기 위해 고장수목을 바탕으로 확률론적 시각 도구인 베이지안 네트워크(Bayesian Network, BN)로 변환하여 리스크를 평가하는 방법을 제안한다. 제안된 방법을 이용하여 임의로 생성된 가스플랜트 Plot Plan에 대해 최종 BN을 구축하고, 다양한 사건 경우에 대한 효용성있는 의사결정과정을 보임으로써 그 우수 성을 확인하였다.

Cellular myxoma is an uncommon type of myxoid benign tumor, predominantly occurring in adult female patients aged >40 years. This report aims to document a case of cellular myxoma that occurred in the buccal mucosa. Compared to intramuscular myxomas, cellular myxoma demonstrates hypercellularity and vascularity. Its manifestation in the soft tissue of the head and neck area is exceptionally rare. Generally, cellular myxoma manifests as a firm and immovable mass covered with normal oral mucosa, with no associated clinical symptoms. Homogenous low signal intensity on T1-weighted scans and high-signal intensity on T2-weighted magnetic resonance scans reveal cellular myxoma, as most lesions show well-defined margins and heterogeneous contrast enhancement. The significant histologic features include a focal or diffuse increase in cellularity with fibroblast-like cells and vascularity with an abundant collagenous matrix. Our presented case reflects these facts examinations, based on which a final diagnosis of cellular myxoma was made. Immunohistochemistry revealed locally and diffusely positive SMA and CD34. The clinical tendency of cellular myxoma with hypercellularity may affect the production of myxoid and collagenous substrates, and if complete resection is not performed, the possibility of local recurrence in the primarily affected region remains. Hence, complete surgical excision was performed under general anesthesia, and follow-up until a year after treatment revealed no observed recurrence. To achieve precise diagnosis and complete treatment without local recurrence, several diagnostic examinations should be considered.