배수문에서 실내모형실험에 의한 무동력 토사제거시스템의 수리 특성

박찬근,오범환,이달원,Park, Chan Keun,Oh, Beom Hwan,Lee, Dal Won 한국농공학회 2014 한국농공학회논문집 Vol.56 No.5

In this study, the large-scale hydraulic model test was performed to investigate the hydraulic characteristics for development of the non-power soil cleaning and keeping system at the dike gate. The outlet height, outflow number, outflow discharge, and outflow cycle were compared and analyzed. The non-power soil cleaning and keeping system was most effective at 11.2 mm in the outlet height. And then the mean outflow cycle was 1.09 sec, and the mean outflow discharge was $0.00164m^3/s$. The total outflow number increased gradually as the water level of a water tank increased, and the outlet height decreased. As a level of water tank decreased, the mean outflow cycle was lengthened, and the unit outflow discharge increased. This result showed this system was most effective. To remove the silty clay deposited in facilities, the methods of excavation, dredging, high pressure washing, etc have been applied to the tidal facilities such as land reclamation, a small size fishing port, and a harbor for maintenance. However, this is extremely cost-ineffective, whereas the non-power soil cleaning and keeping system will bring about an enormously positive economic effect. In addition, when the non-power soil cleaning and keeping system is applied to the dike gate of land reclamation, a thorough examination of the local tidal data and the careful system planning are required to prevent the disaster damage caused by flooding.

공장 장간막에 발생한 원발성 악성 섬유성 조직구종 1 예

박찬근(Chan Keun Park),이정호(Jung Ho Lee),김형기(Hyung Gi Kim),박봉수(Bong Sou Park),최낙현(Nak Hyun Choi),최웅승(Oung Seung Choi),방규태(Gyu Tae Band),변동일(Dong Il Byun),정동균(Dong Kyoon Jeong),권국환(Kuk Hwan Kwon) 대한내과학회 1994 대한내과학회지 Vol.47 No.5

Malignant fibrous histiocytoma was introduced in the early 1960s to describe a well known sarcoma of soft tissue, the tumors arise on the extremities or in the retroperitoneum and are located adjacent to deep fascia or within skeletal muscle. Local recurrence and distant metastasis are very common. Intraabdominal Malignant fibrous histiocytoma are very rare and only several cases were reported till now. We report one case of intraabdominal primary malignant fibrous histiocytoma in 21-year old female patient who had growing nontender mass of left lower abdomen. The presenting site was the mesenteric border of the proximal jejunum about 60 cm below the ligament of Treitz.

청대(淸代) 이부吏部) 월선(月選)의 축소에 대하여 -선결(選缺)과 현지임용의 관계를 중심으로-

박찬근 ( Park Chan-keun ) 연세사학연구회 2016 學林 Vol.38 No.-

Within the territory of the existing Ming, the Qing court had to seek administrative changes in order to maintain effective governance because the difficulty in the governance was affected by the population growth and changed in circumstances. For this reason, Qing court modified the way of personnel administration which had been enforced by Ming and created the new way of this. A part of the way they created of the personnel administration of Qing dynasty, underlined by advanced research, was ti-bu(題補) and diao-bu(調補) which were exerted by governal-general and governor. At first, ti-bu and diao-bu was used for the post that needed faster administrative process, that couldn``t effectively proceed with seamless communication progress with the capital because of war, or their distance far from the capital. Most of a ti-que(題缺), the post where officails were assigned by ti-bu, a diao-que(調 缺), the post where officials were assigned by diao-bu, and a xuan-que(選缺) used by the board of civil office were organized during Yongzheng and Qianlong reign. And the number of each ti-que, diao-que, and xuan-que was maintained. This is because Qing court opposed requests of changing the xuan-que to the ti-que or diao-que wich were claimed by governal-general and governor, and if there had been a need to change, they should have change the ti-que or diao-que to xuan-que as many. This notion was originated in the effort to secure the number of xuan-que consistently for making a yue-xuan(月選;personnel administration progressed by the board of civil office) work smoothly. Although the number of each ti-que, diao-que, and xuan-que was fixed, the real scale of the yue-xuan was being downsized. This phenomenon was caused by abusing the ``spreading official candidates to a provinces``(fenfa;分發) system started from the second year of Yongzheng``s reign. The enforcement of a daitiao(大挑) and ``spreading official candidates to a provinces by juanna``(捐納分發)in Qianlong``s reign, and increasing the sort of the fenfa made the result transfer candidates of the board of civil office to candidates of the provinces. Because these candidates of the provinces could officially be assigned to all of ti-que, diao-que, and xuan-que, they encroached the xuan-que in provinces. The problem was that this proceed went in opposite direction with the central government``s intention. The separation and fulfillment of each ti-que, diao-que, and xuan-que had been emphasized by emperors and the board of civil office continuously. With this effort, the majority of the xuan-que was maintained until Guangxu``s reign. Nevertheless, the reason of the downsize of yue-xuan was because candidates of provinces had been assigned at the xuan-que. Eventually, Qing court, in the middle of Qing dynasty, had been increased the sort of the fenfa for reducing a backlog of candidates to be assigned of the board of civil office, but this task had been reduced the scale of the substantive xuan-que, and then the yue-xuan had been downsized circularly.

모바일 기기의 무선전력전송 표준화 동향

박용주(Yongju PARK),박찬근(Chan-keun Park) 한국정보과학회 2023 정보과학회지 Vol.41 No.9

관능검사에서의 신뢰성검정을 통한 연구

조영석(Young-Suk Cho),박찬근(Chan-Keun Park),이용재(Yong-Jae Lee) 한국자료분석학회 2003 Journal of the Korean Data Analysis Society Vol.5 No.2

본 논문에서는 녹차 3종류의 시료(개발녹차 I, 개발녹차 II, 시판녹차)의 선호도, 색, 향, 맛에 대한 평균차이 검정을 하고자 분석자 25명의 자료를 분산분석하였다. 분석자 25명의 전체 자료의 분산분석 결과와 SPSS 10.0의 신뢰성검정을 통하여 분석자 중 응답의 상호 불일치성이 있는 분석자를 제외한 분산분석 결과를 비교 분석하였다. 그 결과 25명의 분석결과 시료에 따른 평균차이는 없었다. 그러나 SPSS 10.0의 신뢰성검정을 통하여 불일치성이 있는 9명을 제외한 16명의 분석결과 3종류 시료에 따른 평균차이가 있었다. 그 결과를 구체적으로 보면 맛의 경우에는 유의확률 .035, 향의 경우에는 유의확률 .035이며, 사후검정결과 개발녹차 I와 시판녹차가 평균차이가 있는 것으로 나타났다. This research analyzes the variance of mean difference of the preference, color, aroma, and testes based on the three kinds of sample tea; Development Green Tea I, Development Green Tea II, and Marketing Tea Bag Green Tea, subjecting of 25 sensory panels. We compare the results of variance analysis between overall results of 25 panels and ones of the rest of people except discordant occurring the reliability test of SPSS 10.0. Given these results, the results of 25 panels are equal means, but the results of 16 panels except discordant occurring the reliability test of SPSS 10.0 are unequal means. From the results of variance analysis and the post hoc test, the p-value of the testes is .035, the p-value of the aroma is .035, the means of Development Green Tea I, Marketing Tea and Bag Green Tea are unequal.

소장의 비특이성 궤양에 의한 회장 천공 1 예

방규태(Kyu Tae Bang),박찬근(Chan Keun Park),최낙현(Nag Hyun Choi),박봉수(Bong Soo Park),최웅승(Oung Seung Choi),변동일(Dong Il Byun),김형길(Hyung Gil Kim),정동균(Gong Gyoon Jung),오광제(Kwang Je Oh),심강섭(Kang Sup Shim) 대한내과학회 1993 대한내과학회지 Vol.45 No.5

Ulcers of the small bowel distal to the duodenum are not common, and some ulcers are unexplaned by any specific mechanism and have been termed nonspecific or idiopathic small bowel ulcer. In Korea, nonspecific ulcer of the small bowel is quite rare, comparison of the western contury. Recently we experienced a patient with nonspecific ulcer of ileum. A 50-year-old male patient was admitted to the hospital because of intestinal obstruction and perforation. By laparotomy, perforation and numerous stenosis were identified in the 55 cm from ileocecal valve, segmental resection has been done. The histologic findings identical to the peptic ulcer suggested the feature of nonspecific ulcer of small bowel. We present this case with the review of literature.

위 결핵을 동반한 결핵성 기관지 식도루

이종영 ( Jong Young Lee ),박찬근 ( Chan Keun Park ),백용아 ( Yong Ah Baek ),최웅승 ( Oung Seung Choi ),김형길 ( Hyung Gil Kim ),정동균 ( Dong Kyoon Chung ),오광제 ( Kwang Je Oh ),최조영 ( Cho Young Choi ),이수남 ( Soo Nam Lee ) 대한결핵 및 호흡기학회 1991 Tuberculosis and Respiratory Diseases Vol.38 No.2

통계적 메타분석을 응용한 미래기술개발로드맵 도출에 관한 연구

유영상(Youngsang Yoo),박정석(Jeong-Seok Park),정내양(Nae-Yang Jeong),박찬근(Chan Keun Park),허태영(Tae-Young Heo) 한국산업정보학회 2008 한국산업정보학회논문지 Vol.13 No.4

본 연구에서는 정보통신 시장의 급격한 변화를 감지하고 경제 및 사회적 미래예측을 통하여 고객의 니즈에 부합하는 미래기술을 발굴하기 위한 방법으로 통계적 메타분석(meta analysis)을 응용하여 미래기술예측을 실시하였다. 특히 미래기술개발을 위한 주요 핵심트렌드를 기술, 고객니즈 차원에서 검토하고, 도출된 동인과 장애요인을 기반으로 하여 통계적 메타 분석을 응용하여 미래기술을 예측하였으며, 정보통신(information and communication technology, ICT)분야에서 메타 분석을 이용하여 예측 가능한 미래기술을 도출하여 미래기술개발 로드맵을 구축하였다. As the information and communications market goes more uncertain, foresight activities becomes more important. A number of foresight activities, such as trend analysis, have been used to predict customer needs. However previous studies tend to lack objectivity and systematization. In this study, we suggest a meta analysis methodology which combines both top-down and bottom-up approach in order to systematize the analysis process. Secondly, we applied this approach to ref market to identify essential future technologies. Based on the result from the meta analysis, we have constructed the future technology roadmap.

대퇴 경부 골절에서 다발성 핀 내고정 후 발생한 무혈성 괴사와 불유합에 영향을 미치는 위험인자

성열보 ( Yerl Bo Sung ),신용운 ( Yong Woon Shin ),박찬근 ( Chan Keun Park ) 대한고관절학회 2009 Hip and Pelvis Vol.21 No.1

Purpose: We wanted to analyze the influences of risk factors on avascular necrosis and nonunion after multiple pinning for a femoral neck fracture. Materials and Methods: Among the cases of multiple pinning for a femoral neck fracture that were seen at our department from June 1995 to May 2006, we analyze 102 cases that had more than 2 years of follow-up. We evaluated the influence of such factors as the age, gender, injury on the right-or left-side, the degree of displacement, the time to operation, the angle of fracture, the accuracy of reduction and posterior cortex comminution on avascular necrosis and nonunion after multiple pinning for a femoral neck fracture. Results: The incidences of AVN and nonunion were 13.7% (14/102) and 10.7% (11/102), respectively. The degree of displacement was a significant factor that influenced the development of nonunion (p<0.05). The time to operation and the angle of fracture were significant factors that influenced nonunion (p<0.05 & p<0.05) and avascular necrosis (p<0.05 & p<0.05). The posterior cortex comminution was a significant factor that influenced nonunion (p<0.05) and avascular necrosis (p<0.05). Conclusion: The important risk factor for avascular necrosis was the angle of fracture over 60 degrees. The important risk factors for nonunion were the time to operation (over 24 hours), posterior cortex comminution and an angle of fracture over 60 degrees.

Angle Resolved X-ray Photoelectron Spectroscopy와 유기황화합물 단분자막을 이용한 광전자의 평균 자유 행로 측정

이해원,김응렬,박찬근 漢陽大學校 基礎科學硏究所 1995 基礎科學論文集 Vol.14 No.-

X - ray photoelectron spectroscopy(XPS)를 유기 재료 표면의 정량분석이나 깊이 분포분석에 응용하기 위하여 유기 매질에서의 광전자의 평균 자유 행로를 구하고자 하였다. 이를 위하여 methylene(-CH₂-)기의 수가 각각 7, 11, 15개인 ??의 자기집합 단분자막(SA막)을 금표면에 형성하였다. 형성된 막은 reflection - absorption FTIR로 확인하였으며, angle - resolved XPS를 이용하여 평균 자유 행로를 구하고 alkanethiol SA막의 탄화수소계열에 대한 평균자 유행로의 표준으로서의 가능성을 살펴보았다. 또한, 이 과정에서 x - ray의 영향으로 SA막의 두께가 감소되는 것을 관찰 할 수 있었다. To apply x - ray photoelectron spectroscopy for surface analysis or depth profiling of organic material, there needs to know the attenuation length of photoelectron from organic matrix, For this purpose, ??(n=7, 11, and 15) monolayers by self - assembly(SA) were prepared on gold surface and identified by reflection - absorption(RA) FTIR. The attenuation length of photoelectrons from each SA monolayers has been estimated by angle resolved XPS and the possibility of using alkanethiol SA monolayers as standards for organic surface analysis has been studied. The decrease of the thickness of SA films by x - ray was observed.