할로카본의 산화 분해반응을 통한 VOCs 제거 연구

김도균,장원철,이태진 ( Do Gyeun Kim,Won Chul Chang,Tae Jin Lee ) 한국화학공학회 1996 화학공학의이론과응용 Vol.2 No.2

적혈구 침강속도에 대한 Westergren tube 각도, 온도 및 NaCl 농도가 미치는 영향

김도균,김영홍,유창준,Kim, Do-kyun,Kim, Young-hong,Yu, Chang-jun 대한수의학회 1996 大韓獸醫學會誌 Vol.36 No.1

Erythrocyte sedimentation rate is influenced by plasma protein, red cell itself and physiological conditions and it is clear that the measurement of erythrocyte sedimentation rate varies with technique and various environmental factors. The effect of temperature, angle of test tube, and osmobility with different percent of NaCl solution on erythrocyte sedimentation rate on sheep was determined by modified Westergren method. In sheep, as the angle of Westergren tube was decreased from $90^{\circ}$ to $45^{\circ}$, erythrocyte sedimentation rate was increased in both diluted plasma and NaCl solutions. As temperature was increased from $4^{\circ}C$ to $20^{\circ}C$ at $45^{\circ}$ angle. erythrocyte sedimentation rate was increased. In ruminants, this modified Westergren methods, erythrocyte 1 : plasma 9 instead of erythrocyte 4 : plasma 6(whole blood), enable them to have meanings as dog therefor, using this method, clinical can determine the erythrocyte sedimentation rate of ruminants for diagnosis. Because erythrocyte sedimentation rate was changed according to the angle of Westergren tube, temperature as erythrocyte diluted with NaCl, this study detected that the change of temperature, the angle of Westergren tube could change erythrocyte sedimentation rate by effecting red cell itself. The increase of osmobility owing to change of NaCl percent resulted in the decrease of rapid erythrocyte sedimentation rate. So this fact indicate that deformibility and the change of red cell volume have meaning in the change of erythrocyte sedimentation rate.

임해매립지의 느티나무 식재 이후 뿌리 생장특성 -뿌리구조 및 세근의 공간적 분포를 중심으로-

김도균,Kim, Do-Gyun 한국조경학회 2007 韓國造景學會誌 Vol.35 No.5

This study was carried out to analyze both the root structure and the fine root phytomass of the vertical and horizontal distribution of Zelkova serrata Makino. which was transplanted in the reclaimed land from the sea in Gwangyang, Jeonnam, South Korea. The base ground was reclaimed land from the sea. $Z_1$ of the planting ground was filled to a $100{\sim}150cm$ thickness with the improved soil instead of the reclaimed soil from the sea, $Z_2$ of the planting ground was covered to a $20{\sim}30cm$ thickness with the improved soil and $Z_3$ of the planting ground was mounded to 120cm thickness with the improved soil on the reclaimed land from the sea. In addition, $Z_4,\;Z_5\;and\;Z_6$ of the planting grounds were at the large-sized mound on the reclaimed land from the sea. $Z_4$ of the planting ground was located at the lowest level, $Z_5$ planting ground was located at the slope and $Z_6$ planting ground was located at the top of the large-sized mound. The large-sized mounds contain 3 layers, the base layer was reclaimed land from the sea and the second layer was mounded to a $200{\sim}300cm$ thickness with the desalinized soil from the sea on the base layers and the finally layers were mounded to a $80{\sim}120cm$ thickness with improved soil on the second layer. The planting grounds $Z_3,\;Z_4,\;Z_5\;and\;Z_6$ developed roots such as tap roots, lateral roots and heart roots. However, in $Z_1\;and\;Z_2$ roots development were inhibited. The fine-root phytomass of the 6 planting ground types was as follows: $113.5g\;DM/m^2$ for $Z_5$, $105.5g\;DM/m^2$ for $Z_4$, $88.3g\;DM/m^2$ for $Z_3$, $81.0g\;DM/m^2$ for $Z_6$, $73.0g\;DM/m^2$ for $Z_2$, $43.3g\;DM/m^2$ for $Z_1$. The vertical distribution of the fine root phytomass decreased from the upper to the deeper soil profiles in the 6 mound types. The fine root phytomass was $43.3{\sim}71.8%$ in a $0{\sim}20cm$ thickness of soil layer and it decreased according to the distance from the nearest trees. The root growth in the improved soil was better than in the reclaimed soil from the sea. However, root growth decreased more in the disturbed soils even though the planting grounds contained the improved soils. The retarded development of roots and the spatial distribution patterns of the fine root phytomass were closely connected to the reclaimed soil from the sea. In the disturbed soil, the soil hardness and alkalic cation($Na^+,\;K^+,\;Ca^{2+},\;Mg^{2+}$). were high and the soil water was lacking. We suggest that the construction of planting grounds and the improvement of bad soil are necessary for the proper and effective growth of landscaping plants.

Study on the Injection System for Cyclotron Mass Spectrometry

김도균,J. Y. Kim,방형찬,C. C. Yun,J. W. Kim 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23

The accelerator mass spectrometry (AMS) based on a cyclotron can be compact and economical compared to the commercial Tandem AMS. However, AMS cyclotrons previously built suffered largely from poor transmission efficiency. To improve the efficiency, it is important for the injection system to match the beam phase space with cyclotron acceptance. We plan to adopt a sawtooth rf buncher for longitudinal phase-space matching and a flat-topping rf system in the cyclotron for a larger phase acceptance. The beam optics for the injection line was studied using TRANSPORT and TRACE-3D, keeping a minimal number of beam line elements. The shapes of extraction electrodes and Einzel lens were simulated using IGUN. A prototype beam line is being constructed so that the beam measurements in comparison with calculation results will be used to reveal an optimal design.

고체 염기성촉매하에서 메탄올에 의한 아닐린의 알킬화 반응

김도균,이태진 ( Do Gyeun Kim,Tae Jin Lee ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1997 No.0

부착면 표면물질에 의한 성능 왜곡을 최소화한 이중 선로의 비대칭 다이폴 형태 태그 안테나 설계

김도균,추호성,Kim, Do-Kyun,Choo, Ho-Sung 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.4

본 논문에서는 부착될 물질이 가지는 전기적 특성에 의한 성능 변화가 적은 이중 선로의 비대칭 다이폴 형태 RFID 용도 태그 안테나(Asymmetric Dual-arm Dipole Antenna: ADDA)를 제안하였다. 제안된 태그 안테나는 상용 의료 폐기물 수거용 플라스틱 밀폐 용기(${\varepsilon}_r=1.7,\;tan\;{\delta}=0.002$)에 부착하여도 안테나의 동작 특성 변화가 적도록 설계되었다. 안테나의 세부적인 설계변수는 자유공간과 인식 대상 물체에 부착시 우수한 인식거리 성능을 나타내도록 Pareto 유전자 알고리즘을 사용하여 최적화하였다. 최적화 태그 안테나는 $100\;mm{\times}50\;mm$의 크기를 가지며, 3.7 %의 반사 손실 대역폭($S_{11}$< -10 dB)을 가지고 80 %의 복사효율을 나타내었다. 인식 거리 측정 결과, 자유공간에서 정면 방향(broadside) 5.3 m, 의료 폐기물 수거용 플라스틱 밀폐 용기에 부착시 최대 5.5 m의 인식거리 성능을 가지는 것을 확인하였다. In this paper we proposed the tag antenna with a low performance distortion from an attached surface material using the asymmetric dual-arm dipole antenna(ADDA) structure. The tag is designed to exhibit low performance changes when the tag is attached on a target object(the medical litter receptacle, ${\varepsilon}_r=1.7,\;tan\;{\delta}=0.002$). Detail design parameters for the proposed antenna are optimized to maintain a good readable range in free-space as well as on a target object. The size of the optimized antenna is $100\;mm{\times}50\;mm$. The antenna shows the matching bandwidth($S_{11}$< -10 dB) of 3.7 % and the radiation efficiency of 80 % at the operating frequency. Finally we confirmed the readable range of the tag antenna by measurement and it shows about 5.3 m in free space and 5.5 m on the target object.

건설회사의 생산성 향상을 위한 조직몰입에 관한연구

김도균,강경식,Kim, Do-Gyun,Kang, Kyung-sik 대한안전경영과학회 2017 대한안전경영과학회지 Vol.19 No.1

This paper provides a basic organizational commitment research for the study was conducted academic research, especially acidic improvements in the construction industry for a job commitment on organizational commitment. In this paper, first results are derived for literature to study and improve productivity and derive a major cause of job involvement of construction companies based on it for critical that the rationale organization.

시뮬레이션 기반 수도권 리사이클링 센터 폐냉장고 전처리 공정 개선

김도균,강민구,최진영,박기진,공만식,Kim, Do Gyun,Kang, Min Koo,Choi, Jin Young,Park, Kiejin,Kong, Man-Sik 한국시뮬레이션학회 2013 한국시뮬레이션학회 논문지 Vol.22 No.4

본 논문에서는 수도권 리사이클링 센터 폐냉장고 전처리 공정의 성능 개선 방안에 관하여 연구하였다. 이를 위해 현행 전처리 공정을 기본 작업 단위로 구분하고 공정 별 작업 시간을 측정하여 ARENA를 이용한 모델링 및 성능 분석을 수행하였다. 또한 실무자의 경험과 선진 사례 등에 기반한 3가지 새로운 전처리 공정 대안을 생성한 후 ARENA를 이용한 모델링 및 시뮬레이션을 통해 평가하였다. 최종 선정된 대안은 현행 2-라인 공정을 1-라인으로 전환하고, 냉매를 회수하기 위한 별도의 셀라인을 도입하는 것을 포함한다. 본 연구 결과는 현재 새로운 전처리 공정 라인으로 설치되어 운영되고 있으며, 이전 공정에 비해 사이클 타임과 생산성 향상뿐만 아니라, 공간 활용률 측면에서도 크게 개선된 결과를 보였다. This paper studies the improvement of a pre-processing line for waste refrigerators in a metropolitan recycling center(MRC). We performed ARENA modeling and simulation by using work analysis and time measurement on the current processing line. Combined this result with some practical experiences from workers, we generated 3 alternatives to improve the current line and evaluated them by using ARENA simulation. The final decision selected consists of changing 2-line process into 1-line and having a separate cell-line for collecting refrigerant. Currently, the result of this study was applied to MRC by improving cycle time, throughput, and space utilization compared to the previous one.

조경시공분야 신입사원들의 이직의도에 영향을 미치는 요인

김도균,유일,Kim, Do-Gyun,Ryu, Il 한국조경학회 2015 韓國造景學會誌 Vol.43 No.2

This study aimed to identify influencing factors such as job environment, job characteristics, and job competency as they are related to newcomer turnover intentions in the construction of landscape architecture, Korea. The results based on statistical analyses are follows as: The turnover experience of newcomers in the field of landscape architecture construction was 54.5%, about 1.6 times higher than in other fields. The influencing factors among newcomer turnover intentions in the construction of landscape architecture were workload(p<0.01), job suitability, and personal relations(p<0.01), while in job autonomy, work conditions, job competency, job identity, job variety, and job compensation were not statistically significant. This study found that key important factors of dependent variables that conceptually explain the influence of turnover intentions among newcomers differed between the construction of landscape architecture and other fields. The most important factors in turnover intention were workload>personal relationship>job suitability among independent factors. This study implied that efforts for improvement are needed in areas of workload, personal relations, and job suitability to mitigate newcomer turnover intentions so as to establish common and personal goals in the field of landscape architecture construction because turnover intention could lead losses in human resources, time, economy, and psychological health. In conclusion, this study suggested the importance of efforts for human resource management to reduce turnover intentions among newcomers in the field of landscape architecture construction. 본 연구는 조경시공분야 신입사원들의 직무환경, 직무특성, 직무역량이 이직에 미치는 영향을 개념적으로 파악하기 위하여 연구가설과 연구모형을 개발하여 설문에 의한 실증 분석하였다. 조경시공분야 신입사원들은 입사 3년 이내에 이직경험이 54.5%로 우리나라의 다른 분야 대졸신입사원들보다 1.6배 정도 더 높았다. 조경시공분야 신입사원들의 이직의도에 크게 영향을 미치는 것은 사회통계학적으로 직무량(p<0.01), 직무적합성(p<0.1), 대인관계(p<0.1)에 유의하였고, 나머지 직무자율성, 직무여건, 직무역량, 직무정체성, 직무다양성, 직무보상은 통계학적으로 유의하지 않았다. 조경시공분야 신입사원들의 이직의도에 크게 영향을 미치는 요인은 직무량>대인관계>직무적합성 순으로 나타났다. 본 연구를 통하여 조경시공분야 신입사원들의 이직의도가 매우 높게 나타나서 인적자원관리가 필요함을 시사하였다.

광양만 임해 매립지 느티나무 이식 이후의 연륜생장 특성

김도균,Kim Do-Gyun 한국조경학회 2006 韓國造景學會誌 Vol.33 No.6

This study was carried out to examine the tree-ring growth characteristics of Zelkova serrata Makino after replanting, for the built-up planting founds for stability of landscaped trees in the reclaimed land from the sea. the factors, many affecting the growths of Zelkova serrata Makino, were the replanting stress and drought. The growth reduction due to replanting and drought occurred in the replanting year and the following year. The mean sensitivity(year-to-year variation) and the coefficient of variation(tree-to-tree variation in a certain year) in tree rings of Zelkova serrate Makino, were higher in the poor soil sites than in the favourable soil ones. And the poor soil sites were the filled ground of improve soil and the covered ground of improve soil and the top ground of big mounding than mounding ground sites, especially soil hardness, alkali soil, high $Na^+\;and\;K^+,\;low\;Ca^{++}\;and\;Mg^{++}$ and T-C were the most crucial. We suggest technique development of the built-up planting ground for stability in the reclaimed land from the sea. The built-up planting grounds in reclaimed land from the sea, should be considered for the use of fair soil with the physical and chemical soil properties, -high level foundation of planting ground, and the prevention of disturbed soil-.