로타 초음파 검사에서의 초음파 평가 결함크기와 실결함 크기와의 관계

성운학,김정태,박윤식 한국비파괴검사학회 2003 학술대회 논문집 Vol.- No.1

In order to evaluate the reliability of rotor forgings, it is very important to know the actual size of the defects in the rotor forgings. The determination of the defect size requires the accurate non-destructivc measurement. However, there may be some differences between the reported size with the ultrasonic non-destructive testing method and the actual size of defects. These differences may be a severe cause of errors in evaluation of rotor forgings. So, the calculated size with "Master Curve" considering safety factor, which is usually larger than the reported size, has been used in evaluation of rotor forgings. The relation between EFBH (Equivalent Flat Bottom Hole) size measured by non-destructive method and the actual size by destructive method in many rotors manufactured at Doosan was investigated. In this investigation, "Master Curve" compensating the differences between UT reported size and actual size of defects in our rotor forgings was obtainable. The applicability of this "Master Curve" as a way of calculating the actual defect sizc was also investigated. For the evaluation of rotor forgings, it is experted that this "Master Curve" may be used to determine the accurate actual size of defects.

중간영역적 사이공간의 적용을 통한 커뮤니티의 형성에 관한 연구 : 터미널의 비스타 중심으로 Focused on vista of Terminal

조벽호,박운성 홍익대학교 미술디자인 · 공학연구소 2005 미술디자인 논문집 Vol.- No.10

Although a city is demarcated and maintained with the background of plan principle and theoretical philosophy today, the city has grown over a long period of time, say hundreds of years, rather than it has been developed as intended in advance. Because of such as slow developing pace, physical environment can be constantly adjusted and adapted in line with the city functions. A city is not the goal itself, but a tool to be formed according to its use method. The medium to combine the part and whole in forming such city space is the place. The path of in between space with intermediary scope attribute is a part of large scale city environment place and network, and it plays a role to divide many residential areas and also functions as a supplementary role connecting the buildings in dry environment for the circulation of network. Even though the place becomes the beginning of external space centered on the buildings of city space, the path with intermediary scope attribute plays a functional role as structure forming the city; however, the path to humans functions as a existing arena as intermediary scope space, which cannot be seen as simply public space from the city perspective. Looking into the features of today's society, especially the features of modern city were greatly handled. As urbanization and networking progress, most buildings are produced in the cities; the reason is because many architects pay attention to therelation change between architecture and city and the change of living style of city people. There are various trends presenting new alternatives by urban environment scholars or architects. Kevun Lynch (1918~1976) concretely explains the city types of five methods as a means to analyze city in "The Image of City:" Path, edge, district, nodeand landmark Space that actualizes the results of new tools (methods) by regarding those as the process of forming space will be formed and built. These five are the city types already drawn by Lynch, and he predicted the places where the image of city will change. These are the terms to express the images of city, and the drawings accordingly are the diagrams. The analysis of Lynch is possible to be applied in the space building process indicated in the dual mixture of city space in the modern society mentioned in the main body. Also the mixture of complex structure is needed as a tool to express the content and shape. City space is the changeable thing. If it copes with the changing environment, the design meaning and possibility provided to us by the formation of city space and interior space in regards with the methodological solution used as an active tool in the interior design that integrates the diagram, after making a variety of information in the modern society regarding programmed datascape formation by the data analysis of physical and non-physical city space shown in the modern society in terms of building activities database and after transforming it to diagram is to be shown.

Analysis of clinical features of poroma: Retrospective, multi-center study

( Seong Min Hong ),( Sang Woo Ahn ),( Jong Uk Kim ),( Gyeong Je Cho ),( Woo Jung Jin ),( So Hee Park ),( Un Ha Lee ),( Hai-jin Park ),( In Ho Park ),( So Young Jung ),( Jung Eun Seol ),( Hyojin Kim ) 대한피부과학회 2020 대한피부과학회 학술발표대회집 Vol.72 No.1

Background: Poroma is the benign adnexal tumor originated from the eccrine sweat gland. Poroma typically present as erythematous nodule on acral area. Objectives: The purpose of this study was to investigate the clinical characteristics of poroma. Methods: We reviewed medical records of those who were pathologically diagnosed as poroma or those whose lesions were clinically suspected as poroma. Results: A total of 103 patients with histopathologically confirmed poroma and 69 whose lesions were clinically suspected as poroma were enrolled. Only a third of clinically suspected poroma was confirmed histopathologically while 78.6% of confirmed poromas were not clinically suspected as poroma. The most common discrepant clinical diagnosis of confirmed poroma was verruca (16.5%) followed by pyogenic granuloma (12.6%) and nevus (6.8%). Lesions occurred most frequently in the acral site (60.4%), followed by the head/neck (25.2%). As a whole, plaque (57.2%) was the most commonly presented lesion followed by mass/nodule (42.8%). However, mass/nodule was dominant at the head/neck (57.7%) while plaque at the acral site (63.5%) (p=0.014). Conclusion: It is likely that poroma showed diverse characteristics in shape as well in distribution, which makes it difficult to suspect or diagnose poroma clinically. It is suggestive that difference in commonly presented clinical features depending on the location should be considered.

Sensory evaluation and texture properties of frozen fried rice using different rice varieties

Gi-Un Seong,Ji-Yoon Lee,Sais-Beul Lee,Yeongsoo Park,Jun-Hyeon Cho,Ki-Won Oh,Dong-Soo Park,Ju-Won Kang 한국육종학회 2023 한국육종학회 공동학술발표집 Vol.2023 No.-

알루미늄·철 산화물 동시피복모래에서 Bacillus subtilis의 부착

박성직(Seong Jik Park),이창구(Chang Gu Lee),한용운(Yong Un Han),박정안(Jeong Ann Park),김성배(Song Bae Kim) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.7

본 연구에서는 칼럼실험을 이용하여 알루미늄·철 산화물 동시피복모래에서 박테리아(Bacillus subtilis)의 부착에 산화음이온(질산염, 탄산염, 인산염)이 미치는 영향을 조사하였다. 실험결과, 질산염의 경우 피복모래에서의 박테리아 부착은 질산염 이온의 농도변화와 무관하였다. 질산염의 농도가 변화함에 따라(0.1, 1, 10 mM) 질량회수율은 10.9±0.2 %로 일정하였다. 탄산염의 경우 농도가 0.1 mM에서 1 mM로 증가함에 따라 질량회수율이 25.6%에서 39.0%로 증가하였고, 인산염의 경우에도 동일한 농도조건에서 50.9%에서 78.9%로 증가하였다. 이러한 현상은 박테리아 부착에 대한 탄산염과 인산염 이온의 방해효과 때문이었다. 반면, 탄산염/인산염의 농도가 1 mM에서 10 mM로 증가함에 따라 질량회수율이 각각 39.0%에서 23.8%로 78.9%에서 52.6%로 감소하였다. 이러한 현상은 탄산염/인산염의 농도증가에 따라 피복모래표면에 흡착되지 않고 수용액상에 존재하는 탄산염이나 인산염 이온이 이온강도를 증가시킴으로써 일어나는 박테리아 부착에 대한 증진효과 때문이었다. 본 실험조건에서 피복모래에서의 박테리아 부착에 미치는 영향은 인산염, 탄산염, 그리고 질산염 중, 인산염이 가장 큰 것으로 나타났다. This study investigated the influence of oxyanions (nitrate, carbonate, phosphate) on the attachment of bacteria (Bacillus subtilis) to Al-Fe bimetallic oxide-coated sand using column experiments. Results showed that bacterial attachment to the coated sand was independent of nitrate concentration. Bacterial mass recovery remained constant (10.9 0.2%) with varying nitrate concentrations (0.1, 1, 10 mM). In case of carbonate, mass recovery increased from 25.6% to 39.0% with increasing carbonate concentration from 0.1 mM to 1 mM, and mass recovery also increased from 50.9% to 78.9% at the same concentration condition in case of phosphate. This phenomenon could be attributed to the hindrance effect of carbonate and phosphate to bacterial attachment to the coated sand. Meanwhile, with increasing carbonate/phosphate concentration from 1 mM to 10 mM, mass recovery decreased from 39.0% to 23.8% and from 78.9% to 52.6%, respectively. This phenomenon could be ascribed to the enhancement effect of free carbonate/phosphate ions present in solution phase due to increasing carbonate/phosphate concentration, which increase ionic strength and thus enhance bacterial attachment to the coated sand. In our experimental conditions, the effect of phosphate to bacterial attachment to the coated sand was the greatest among phosphate, carbonate, and nitrate.

CCTV 열람 접근성 완화를 위한 Edge-computing 기반 자동모자이크 시스템

조성운(Seong-Un Cho),박경민(Kyung-Min Park),윤세준(Se-Jun Yun),이성종(Seong-Jong Lee),최영락(Yeong-Rak Choi),최민규(Min-Kyoo Choi) 한국정보기술학회 2023 Proceedings of KIIT Conference Vol.2023 No.6

결명자 첨가식이가 흰쥐의 체내 카드뮴 축적에 미치는 영향

김성조,백승화,허종욱,김운성,이주돈,강경원,박성혜,한종현,정성윤,이승현 동아시아식생활학회 2002 東아시아食生活學會誌 Vol.12 No.6

The purpose of this study is to investigate the effect of raw Cassia tora L. powder added-diets on reducing cadmium accumulation in rats. The experimental animals were Sprague-Dawley family(♂ , 4 weeks) which was classified into normal group CN, compared group CS, Cd-added group C1 and groups C2, C3. C4 in which 0.5, 1.0 and 1.5% of the Cassia tora L. powder are added, respectively. The growth rate and food efficiency ratio, and the amounts of accumulated cadmium in rats for 8 weeks were measured and analyzed. The results are as follows; 1. The rates of weight gain decreased in the order of C3>C2>C4>Cn>Cs>C1 groups, and C1 group to which only cadmium water had been fed was the lowest among them. The correlation between groups C1 and C3 was significantly different at the 1% level. 2. Food efficiency ratio(FER) decreased in the order of C3>C2>Cs>Cn>C4>C1, and the FERs of C3, C2, CS, CN and C4 are greater than that of C1 by 22.87, 19.89, 18.54, 14.20 and 13.17%, respectively. 3. As fix the Cassia tora L. powder-added groups, the amounts of cadmium accumulated in organs and tissues that is, the brain, heart, spleen, liver, lungs, testicles, kidney, femoral muscle and leg bones were 0.45±0.04 to 0.83±.04, 1.68±0.02 to 2.16±0.02, 3.26±0.05 to 4.62±0.27, 37.82±0.09 to 47.71±0.73, 1.07±0.10 to 1.66±0.04, 1.04±0.06 to 1.24±0.08, 36.79±0.20 to 39.61±0.53, 0.87±0.02 to 1.00±0.02 and 0.65±0.17 to 1.27±0.06 ㎍/g respectively. 4. The accumulated Cd content for C4 was the lowest among Cassia tora L. powder-added groups. When the results for C4 are compared with those for C1, it is observed that each cadmium content accumulated in the brain, heart, spleen, liver, lungs, testicles, kidney, femoral muscle and leg bones is dropped by 49.03, 22.56, 36.02, 35.75, 41.75, 36.20, 37.00, 22.77 and 56.67%, respectively. On the other hand, the accumulated Cd content increased in the order of brain <leg bones <femoral muscle <testicles <lungs <heart <spleen <kidney <liver. 5. The average Cd accumulation rate in organs and tissues relative to the total Cd intake was 7.14% for C1, while they are 4.91, 4.81 and 4.509a for Cassia tora L. powder-added groups C2, C3 and C4, respectively. 6. The Cd content accumulated in the hair for C1 was the highest, and those for Cassia tora L. powder-added groups gradually increased until 6 weeks and decreased after that. 7. The Cd content accumulated in the feces for C4 was the highest, and those for the groups other than C3 and C4 gradually decreased until 6 weeks and increased after that.

동적 계획법을 이용한 차량 장애물 회피 경로 생성

박성운(Seong-Un Park),안창선(Chang-Sun Ahn) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.7

분사압력 변화에 따른 바이오 디젤 무화 특성 연구

박창운 ( Chang Un Park ),박현창 ( Hyun Chang Park ),윤석주 ( Suck Ju Yoon ),( Seong-uk Jeong ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-

The bio diesel had similar properties with diesel, and was well-known as the powerful alternative of the diesel and kerosene. It was available to the trafficking source for energy as well as operation fuel of the home combustor. In this paper, we were studied the atomization performance of the bio diesel in which it controls the boiler performance, and analyzed the effect of the injection pressure varied form 0.4MPa to 2MPa by experiments conditions. As the results, the flow-rate of bio diesel was increased according to increase the injection pressure, and Injection pressure of 1.5MPa was showed Fully developed bio diesel spray. Dmax, MMD and SMD were decreased with increasing injection pressure.

광회절법 입경측정기에서 수광렌즈의 영향

박창운 ( Chang Un Park ),정성욱 ( Seong Uk Jeong ),박현창 ( Hyun Chang Park ),윤석주 ( Suck Ju Yoon ) 한국액체미립화학회 2014 한국액체미립화학회 학술강연회 논문집 Vol.2014 No.-

LDPA(Laser diffraction Particle size Analyzer),that is measuring the size of the particle according to the degree of diffraction of the laser by light scattering, was selected the light-receiving lens in accordance with the working distance and measuring range. In this paper, we were performed about the effect of the light-receiving lens form R3 to R6 and used the five sprayers such as Diesel injector, Humidifier, Syringe, Burner nozzle, Paint sprayer. We were analysed the association of the both liht-receiving lens and sprayers though SMD, Dmax, Distribution. As the experimental results, The light-receiving lens form R3 to R4 were showed more accurate results for small particles than this of R5 and R6 because R3 and R4 were able to collected more of the relativelt small praticles by small measuring ranges. So, LDPA was used to measure large particles in the case of the R5 and R6. Thus, the sprayers should be a reasonable choice of the light-receiving lens.