액체질소를 이용한 터보펌프 인듀서의 수력성능시험

김진선,홍순삼,김진한,Kim Jin-Sun,Hong Soon-Sam,Kim Jin-Han 한국유체기계학회 2006 한국유체기계학회 논문집 Vol.9 No.4

A cryogenic test facility has been developed to perform inducer and pump tests using liquid nitrogen. Performance tests of a turbopump in the maximum 50ton-thrust class can be performed with cryogenic fluid in the facility which operates at a temperature around -196oC with the rotational speed up to 30,000rpm To verify the reliability of the cryogenic pump test facility, hydraulic performance tests of an inducer were accomplished, and their results were compared with the result from a water test. The results confirm the reliability of the cryogenic test facility, and it is expected to contribute for on-going development of a turbopump for liquid rocket engines.

터보펌프용 전진익형 인듀서에 대한 연구

김진선,홍순삼,김진한,최창호,Kim, Jin-Sun,Hong, Soon-Sam,Kim, Jin-Han,Choi, Chang-Ho 한국유체기계학회 2006 한국유체기계학회 논문집 Vol.9 No.2

Computational and experimental studies on the forward-sweep inducer for the rocket-engine turbopump are presented in comparison with the conventional backward-sweep inducer. Computational results show that back flows at the inlet decrease in the case of forward-sweep inducers compared to the back-ward inducer. Moreover, the low pressure region at the back flow is decreased, which is presumed to improve the suction performance of the inducers. Experimental results show that the suction performance of the forward-sweep inducer is almost the same as that of the backward-sweep inducer although it has smaller inlet tip diameter and shorter length. The efficiency of the forward-type inducer is found better than that of the backward-sweep inducer due to the small size of back flows.

Effect of Presurgical Nasoalveolar Molding in Unilateral Cleft Lip and Palate Infants

김진선,김영진,남순현,김현정,Kim, Jin-Sun,Kim, Young-Jin,Nam, Soon-Hyeun,Kim, Hyun-Jung Korean Academy of Pediatric Dentistry 2013 大韓小兒齒科學會誌 Vol.40 No.3

구순구개열은 얼굴에 발생하는 다양한 종류의 기형 중 빈번히 발생하는 기형으로, 발생 빈도는 일반적으로 1000명당 0.28~3.74명으로 알려져 있으나 파열의 종류, 인종 및 성별에 따라 큰 차이를 보인다. 구순구개열의 치료는 수술영역에서 많은 발전이 있었지만 수술만으로는 문제점을 해결하기는 어렵다. 파열부 간격을 줄이고 구순열 수술을 용이하게 하기 위한 술전 신생아 정형술의 개념이 1950년 McNeil에 의해 개발되었으며, 최근에는 술전 비치조 정형장치(presurgical nasoalveolar molding appliance, PNAM)를 사용하여 치조골뿐만 아니라 코의 모양을 정상화하려는 시도가 이루어지고 있다. 세 명의 환자가 편측성 구순구개열로 진단받은 후 술전비치조정형장치 장착을 위해 의뢰되었다. 레진과 교정용와이어를 이용하여 제작한 K-NAM 장치물을 입술 성형 수술을 시행하기 전까지 장착하였다. 첫 내원시와 nasal molding을 시행하여 입술 성형 수술을 하기 직전, 입술 성형 수술 이후 콧구멍의 높이, 너비, 비주의 각도를 측정하여 비교한 결과 세 증례에서 모두 코의 대칭성이 증가하며 술 후 심미개선에 효과적임을 알 수 있었다. K-NAM 장치물은 장치의 장착, 유지, 조절이 용이하고 장착한 상태에서 수유가 가능하기 때문에 장착시간을 증가시킬 수 있다. 따라서 nasal molding이 가능한 한정된 기간 안에 최대의 효과를 기대할 수 있다. 그리고 젖병을 빠는 행위가 가능해짐으로써 동시에 구강조직의 발달에도 도움을 줄 수 있을 것이라 생각한다. Cleft lip and palate, the most common craniofacial anomalies, are severe congenital defects that have an incidence of 0.28 to 3.74 per 1000 live births. Although there has been great improvement in the field of cleft surgery, surgical approach cannot be the single solution to resolve the various problems encountered in patients with cleft lip and palate. The concept of presurgical infant orthopedics (PSIO) for gradual closure of the cleft gap and simplified surgical performance was first introduced by McNeil in 1950. Recently, there are many attempts not only to approximate the alveolar segments but also to reshape the nasal cartilage. Three infants with unilateral cleft lip and palate were referred from the department of Plastic Surgery for presurgical nasoalveolar molding (PNAM). Maxillary appliances using resin with orthodontic wire were fabricated. Then these appliance was applied until patients underwent lip surgery. In all cases, the patients could wear the appliance all day since they were able to eat even with the appliance on, This resulted in significant improvements in the nasal symmetry were found. Our appliance, namely K-NAM, extends the wearing time within the limited period and as a result it is expected to maximize the treatment effects. Used properly, this appliance would play a major role in enhancing nasal symmetry with satisfactory results.

다수 비예혼합 화염의 안정화 특성

김진선,이병준,Kim, Jin-Sun,Lee, Byeong-Jun 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.10

The stability of turbulent nonpremixed interacting flames is investigated in terms of nozzle configuration shapes and kind of fuels. Four nozzle arrangements - cross 5, matrix 8, matrix 9 and circle 8 nozzles - are used in the experiment. There are many parameters affecting flame stability in multi-nozzle flames such as nozzle separation distance, fuel flowrates and nozzle configuration etc. Key factors to enhance blowout limit are the nozzle configuration and the existence of center nozzle. Even nozzle exit velocity equal 204 m/s, flame is not extinguished when there is not a center nozzle and s/d=15.3∼27.6 in matrix-8 and circular-8 configurations. At these conditions, recirculation of burnt gas is related with stability augmentation. Fuel mole fraction measurements using laser induced fluorescence reveal lifted flame base is not located at the stoichiometric contour.

대전입자형 디스플레이 소자의 점유면적 평가방법에 의한 구동특성 및 메모리 효과 분석

김진선,김영조,Kim, Jin-Sun,Kim, Young-Cho 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.8

The charged particle type display is a kind of the reflectivity type display and shows an image by absorption and reflection of external light source, which has keep an image without additional electric power because of bistability. In this paper, we made a device whose cell gap is $56\;{\mu}m$ and also analyzed driving and memory characteristics by applied driving voltages. As a result, we found that the driving voltage and memory effect depend on q/m(charge to mass ratio) of charged particle. In this case of breakdown voltage, the devices showed degradation of reflectivity and memory effect due to irregular movement of overcharged particles. In addition, contrast ratio of the device varies with memory effect. Thus, we consider that device needs uniform q/m for improvement of electric and optical properties and memory effect.

대전입자형 디스플레이 소자의 충전전압에 따른 구동특성 분석

김진선,김영조,Kim, Jin-Sun,Kim, Young-Cho 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.1

The charged particle type display device is a kind of the reflectivity type display and shows an image by absorption and reflection of external light source. The charged particle is important factor for driving of the display and quantity of charge per mass of the charged particle determines the driving voltage, contrast ratio, response time, etc. But it is easy for the charged particles to be damaged in the putting process of the display and the damages cause lumping phenomenon of the charged particles. Because the lumping phenomenon makes high driving voltage, low quality of optical properties, short life time, etc, so the charged particles must be filled by stable putting methods. In this paper, we filled the charged particles into the panels by electric fields to improve the electrical and optical characteristics of the display. Also, we analyzed the driving characteristics of the charged particles according to the applied putting voltages.

해양환경 내 비다공성 표면에 유류된 잠재지문 현출방법에 따른 STR 분석 연구

김진선,김세인,윤현경,추민규,Kim, Jin-Sun,Kim, Sea-In,Yoon, Hyun-Kyoung,Choo, Min-kyu 한국콘텐츠학회 2022 한국콘텐츠학회논문지 Vol.22 No.10

Among the various evidence found in maritime crimes, fingerprints and DNA are very important in that they can identify a suspect. In this study, 5 types of non-porous surfaces (plastic, stainless, glass, ceramic, FRP), which are often found as evidence in the actual marine environment, were selected, and latent and blood fingerprints were passed down and immersed at the Donghae Maritime Police Station's exclusive pier for about 7 days. After that, DNA extraction, quantification, and STR profile were analyzed after fingerprint developing CA fumming method and 4 powder methods (Swedish black powder, Concentrated black powder, Supranano red powder, Dazzle orange powder). Among the fingerprint developing methods, when Supranano red powder was applied, a relatively high amount of DNA was found. As a result of STR profile analysis, an average of 16.8 to 9 loci were secured, and all 20 were confirmed in glass and ceramic materials. As a result of the study, it was possible to secure the STR profile by extracting and quantifying DNA after applying the fingerprint developing method to virtual evidence immersed for about 7 days, and further research is needed to secure the STR profile by analyzing DNA after applying various fingerprint developing methods such as VMD and SPR.

액체질소를 이용한 산화제펌프의 극저온 성능시험

김진선(Jin-Sun Kim),홍순삼(Soon-Sam Hong),김대진(Dae-Jin Kim),최창호(Chang-Ho Choi),김진한(Jinhan Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6

Performance tests of a liquid oxygen pump were carried out using liquid nitrogen(LN2) as a working fluid in a cryogenic turbopump test facility in Korea Aerospace Research Institute(KARI). The tests were performed in the range of 6,000~11,000rpm and their results were compared with those from a water test. The experimental results confirmed the similarity of the hydraulic performance, which allows to predict the pump performance at a design rotational speed of 20,000rpm. The overall cavitation performance of the pump in cryogenic environment was better than that in water environment over all ranges of flow rates and rotational speeds. Critical NPSH at the design flow rate was 6m from the cryogenic test when the speed is converted to 20,000rpm, whereas 12m from the water test. The improved cavitation performance is due to thermodynamic effect in cryogenic fluids.

ADHD 환자에 대한 OROS-Methylphenidate 약물치료의 부작용과 관련요인들에 대한 연구

김진선(Jin-Sun Kim),김붕년(Bung-Nyun Kim),조수철(Soo-Churl Cho),신민섭(Min-Sup Shin),유희정(Hee-Jeong Yoo),김재원(Jae-Won Kim),송동호(Dong-Ho Song),신동원(Dong-Won Shin),정유숙(Yoo-Sook Joung),천근아(Keun-Ah Cheon),신의진(Yee-Jin Shi 대한소아청소년정신의학회 2010 소아청소년정신의학 Vol.21 No.2

Objectives:The aim of this study was to investigate the effect of the clinical and demographic variables such as body weight, dosage, family history of attention-deficit hyperactivity disorder (ADHD), and psychiatric co-morbidity on the side-effects of OROS-Methylphenidate (OROS-MPH), and to evaluate the relationship between drug response and side effect severity. Methods:A total of 144 children (ages 6-18) with diagnosed ADHD were treated with OROS-MPH. Children were examined at baseline and after 1, 3, 6, 9, and 12 weeks of each treatment condition. The stimulant drug side effect rating scale (SERS), pulse rate, systolic blood pressure, diastolic blood pressure, and electrocardiogram (ECG) were evaluated to assess side effect profiles. Changes in these parameters from baseline were examined and analyzed. Results:Anorexia (30.95%) and insomnia (13.10%) were the most commonly reported side effects during this study. Insomnia and loss of appetite score increased at one week follow-up, but was sustained or decreased as treatment progressed. Small but significant increases in pulse rate and diastolic blood pressure were observed during treatment;however, no clinically meaningful changes in ECG parameters were noted during the study. Low body weight, high dosage of OROS-MPH, and family history of ADHD were associated with cardiovascular side effect. In contrast, there was no significant relationship between OROS-MPH treatment response and the severity of side effect and no difference resulted between the responder and non-responder groups with respect to OROS-MPH dosage in the 12 weeks of follow-up. Conclusion:To the best of our knowledge, this study is the first Korean study to investigate comprehensive side effect profiles and their correlates in OROS-MPH treatment for ADHD children. OROS-MPH was well tolerated with no clinically significant side effects during the treatment period. In conclusion, low body weight, high dosage of OROSMPH, and family history of ADHD could be used as predictive factors in increasing pulse rate and blood pressure.

원시유가 심론의 형성과 특징

김진선(Kim Jin sun) 대한철학회 2015 哲學硏究 Vol.136 No.-

원시유가의 심론은 주대(周代)에 인간의 덕(德)으로 천(天)의 법칙을 해석하는 사상적 전통에서 공자가 사회 질서인 예(禮)의 근본을 덕과 심(心)에서 찾은 것에서 시작한다. 심에 대한 관심은 원시유가 사유의 중심을 외부세계에서 생명내부로 전환시켰고, 이는 덕의 내재화 경향으로 나타나며, 맹자에게서 사상적 체계를 갖추게 된다. 본 논문에서는 공자의 예의 근본에 대한 사유와 자사의 저작으로 알려진 『오행(五行)』을 통해 공자로부터 맹자로 이어지는 원시유가 심론의 형성과정과 그 특징을 살펴보고자 한다. 『오행(五行)』은 인간의 마음 상태 또는 생각함(思)을 근거로 진정한 도덕적 행위(德行)와 단지 도덕규범에 부합하는 선한 행위(善行)를 구분한다. 또한 덕행은 천도(天道)라고 규정함으로써 인간의 마음에서 비롯한 행위가 보다 본질적이고 보편적인 것임을 보여준다. 맹자는 인간의 마음이 곧 도덕본체이고 그 마음의 생각함(思)을 통해 도덕적 본질을 자각하고 확충할 수 있다고 주장한다. 원시유가의 심론은 유가의 도덕원칙인 인의예지의 범주 안에서 인간 내면의 마음의 구조와 기능 및 실천적 행위와의 관계에 대해 탐색한 이론이다. 공자는 마음을 인간 내면의 보편적 요소로 도덕원칙의 근거가 될 수 있다고 보았고, 『오행』에서는 마음이 어떻게 도덕적 행위의 실천으로 나타나는지 보여주며, 맹자는 그 마음이 곧 인간의 도덕적 본질이라고 천명했다. 한편 이들이 말하는 마음은 고정되고 불변하는 것이 아니라 움직이고 변하는 것이다. 특히 맹자는 심을 인간 본연의 선한 본성을 나타내는 성(性)과 정(情), 재(才) 등의 개념과 다르게 도덕적 자각과 실천의 주체로서 인간의 도덕적 측면뿐만 아니라 비도덕적 측면과 수양의 필요성을 설명하는 개념으로 사용한다. Confucian theory of mind has its origin in Confucius' finding of virtue and Xin(心) as a root of Li(禮), the social order. That is set in the tradition of thought that interprets the rule of heaven as the virtue of humanity in Zhou dynasties. Concern about mind changes the nucleus of the thought from the outside world to the inside of life. The tendency to internalize virtue thus becomes apparent, following an ideological system. This study looks at the formation and characteristics of Confucian's original theory of mind from Confucius to Mencius through WuXing(五行) written by Zi Si(子思), and Confucius' thoughts about the root of Li(禮). WuXing(五行) separates out the real moral act from good works that merely meet moral standards based on the human state of mind or thought. It also shows that actions originated in the human mind are intrinsic and universal through regulation of virtues by the way of Heaven(天道). Mencius asserts that the human mind is a moral substance and that people can realize and expand moral essence through the thought of the mind. Original Confucian theory of mind explores the structure and the function of the human mind, and the relationship between the human mind and practical actions in Ren(仁), Yi(義), Li(禮), Zhi(智), the categories of Confucian moral principles. How Confucius sees the mind can be the basis of moral principle as the universal element of the human mind. WuXing(五行) shows how the mind appears as the practice of the moral act. Mencius clarified the mind precisely as the moral essence of humans. Meanwhile, the mind they say is not fixed and unchangeable, but moving and changeable. Especially as Mencius uses Xin(心) as a concept to explain not only the moral side of humans as the subject of moral self-awareness and practice, but also the immoral side and necessity of discipline, contrary to the concept of Xing(性), Qing(情), Cai(才), and others that indicate the good nature of human beings.