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임채규,박경수,김홍섭,노영복 조선대학교 기초과학연구소 1988 自然科學硏究 Vol.11 No.1
This experiment was conducted to fine out the rapid composting method and the effects microorganism agent. The results were summarilized as follows; 1. Each temperatures of every composts highest rised at the 5 days during the experiment composting. 2. Composting temperature of the more 60℃ was killed the harmful lavar and pathogenic microorganisms. 3. The lowest C/N ratio was No.2, among the each treatments. 4. C/N ratio of the each treatments were same results of the general compost C/N ratio. 5. The synthesized of these results were recognized the effects of microorganism agent and the each treatments were showed the more rapid composting then general compost.
유아·놀이 중심 관점에서 본 유아교육기관 실외놀이터의 환경 실태 및 유아교사의 인식
홍경섭(Hong, Kyoung Sub),장상옥(Jang, Sang Ock) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.5
본 연구의 목적은 유아·놀이 중심 관점에서 유아교육기관 실외놀이터의 환경 실태를 조사하고 이에 대한 교사의 인식을 알아보는데 있다. 이를 위하여 2020년 2월 중에 실외놀이터가 있는 유아교육기관의 교사 356명을 대상으로 질문지 조사를 하고, 검정, 일원배치분산분석 및 Scheffé 사후검정 등을 적용하여 자료를 분석하였다. 연구 결과, 첫째, 유아교육기관의 실외놀이터의 환경 실태는 기관유형 및 기관규모에 따라 차이를 보였다. 위치 및 접근성에서 일조, 위치, 가시성은 우수하나 전이공간 및 장애유아의 접근성은 미흡하였다. 놀이영역 및 놀이자료에서 기관에 따라 놀이영역의 개수는 다양하나 바닥재료의 종류가 제한된 편이며, 지형이 편평하고, 빈 개방공간, 정적 공간은 구비되었으나 놀이를 할 때 숨을 수 있는 공간, 개별공간 및 비구조적인 열린 자료(Loose Parts)가 미흡하였다. 부대시설 및 안전관리에서 안전관리는 대체로 우수하였고, 휴식 및 수도시설은 상당수 있었으나 실외화장실 및 놀이기구 보관창고가 미비하였다. 환경구성에서는 원장과 교사 주도적 환경구성으로 환경의 변경이 적었고, 환경의 관찰 및 연구도 미흡하였다. 놀이터 운영에서 놀이횟수는 주 3-4회, 놀이시간은 30분-1시간, 놀이는 유아의 자유놀이와 교사의 계획으로 운영되었다. 둘째, 실외놀이터 환경에 대한 교사의 인식은 부대시설 및 안전관리, 놀이터 환경구성을 가장 중요하게 인식하였고, 다음으로 놀이터 운영, 놀이영역 및 놀이자료, 위치 및 접근성의 순으로 인식하였는데, 실외놀이터 환경에 대한 교사의 인식은 연령, 학력 및 경력에 따라 유의미한 차이를 보였다. 연구 결과를 바탕으로 유아·놀이 중심 관점의 실외놀이터 환경 조성을 위한 방안에 대해 논의하였다. The purpose of this study is to find out the actual conditions and teacher’s perception of outdoor playground environment in early childhood education institutions from the young children·play based perspective. As a result, first, outdoor playgrounds of early childhood education institutions had good sunlight, location and visibility in location and accessibility, but had less transfer space and difficult access for disabled young children. The number of play areas and play materials varied, but the number of floor materials were small, and the terrain was flat, open spaces, static spaces were provided, but there were less hiding spaces and loose parts. There were rest facilities and safety management, but there were few outdoor restroom and safe play equipment storage. Safety management was generally excellent. In the construction of the environment, the director and teachers created the environment, and there were few changes, environmental observations, and research. The playground was operated free play for young children and teacher plans. Second, the teacher s perception of the outdoor playground environment recognized auxiliary facilities and safety management, and the construction of the playground environment as the most important, followed by playground operation, play area and play materials, and location and accessibility. The teacher s perception showed significant differences depending on age, education and career. Based on the results of the study, measures were discussed to create an outdoor playground environment.
홍경민,서석훈,김성보,신용섭,김봉식,신부영 한국공업화학회 2002 응용화학 Vol.6 No.2
Thermoplastic starch (TPS) was prepared from starch, sorbitol and PCL by twin extruder and then blends were prepared from linear low density polyethylene (LLDPE) and TPS. Mechanical properties, thermal properties, and morphology were investigated and also biodegradability was studied by using aerobic composting method (ISO 14855). Tensile strength, modulus and elongation at break decreased as the content of TPS increased. The melting temperatures of blends were not changed, so this showed that LLDPE and TPS were immiscible. The morphology of the fractured surface of blend film was investigated by scanning electron microscopy (SEM). After 45 days composting, the biodegradability of blends increased as the content of TPS increased.
洪淳珏,李莊宇,蘇經燮,崔斗植,韓景植,尹明照 現代醫學社 1968 現代醫學 Vol.9 No.2
This study was planned to determine the refraction under. 2% cyclogyl in 612, Korean children ;292 boys and 324 girls) of primary school age from 7 to 12 years. Brightness (illumination) of 9 class rooms among 12 of primary school was measured respectively xith Sight meter (Western model 703-60, type 7, Weston co,) and Sun light illumination meter estern model 756, Weston co.). 1. Among 612 children, refractive error was 75.085o and emmetropia 24.92%. 2. As to the distribution of refractive errores 68.25o were hyperopia and 31.74% myopia. Hyperopia was 41.64% and myopia 19.8%. As to the astigmatism, simple hyperopic was 5,25%, simple myopic 1.95%, compound hyperopic 3.98%, compound my PO-pie 1.13% and 1. miixed astigmation 0.16% 3. Hyperopic refractive error increased until 7 years of age and thereafter it decreased at a rate of change of 0.46D yearly. Myopic refractive errors increased at rate of 0.46D yearly after 8 yrs of age. 4. The refractive errors were more frequent in females (40.83%; 503 eyes) than males Y (34.25%; 422 ' eyes) . 5. Greatest mumber of children have refractive error at 8 years old. 6. Emmetropia was most frequent at 11 years of age and thereafter tends to decrease. ;Hyperopic refractive errer under 1.00D was 60.22% and myopic refractive error under OOD26. 92%-k
USB2.0 용 All-synthesizable 저 전력 전압모드 송신기 구동회로
소경재(Kyoung-jae Soh),김병섭(Byung-Sub Kim),심재윤(Jae-Yoon Sim),박홍준(Hong-June Park) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.11
The transceiver for USB2.0 interface was designed with Verilog and synthesized to enhance design portability. The proposed transmitter (TX driver) generates 0 ~ 400 mV output and implemented using tri-state inverter cell and FSM (Finite State Model). The transmitter driver employs a differential voltage-mode architecture with a variable output voltage swing and includes a pre-driver. The transmitter satisfies the USB2.0 eye-mask specification in the measured eye diagrams. The transmitter consumes 9mW at 1 V supply.
제주도 고산에서의 대기오염물질 측정 및 분석에 관한 연구
박경윤,이동섭,이상훈,홍민선,강창희 濟州大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.6 No.1
Measurements of sulfur dioxide, ozone and meteorological parameters at Korean, Cheju island show clear indications of the influence of the source areas of both Korean Peninsular and Mainland China. Monthly mean levels in February of SO₂and O₃were 1.4 and 44 ppb, respectively. These Values are 2-30 times higher than those measured in remote are as such as Bermuda Island and Uto Island in Finland. Ozone loss in February and March were found to be 0.2 and 0.36 ppb/hr and correlation coefficient between ozone and solar radiation was 0.48. Also it was found that SO₂levels were more than 2 times higher when the prevailing winds were from WSW-NNE than from the rest.