착유시설 형태별 경제성 및 적정사육규모에 관한 연구

박민수,이상영,박종수 ( Min Soo Park,Sang Young Rhee,Chong Soo Park ) 한국축산경영학회 1997 韓國畜産經營學會誌 Vol.13 No.1

PDC와 적분 슬라이딩 모드 제어를 결합한 이동 로봇의 강인 궤도 추적 제어

박민수,박승규,안호균,곽군평,윤태성,Park, Min-soo,Park, Seung-kyu,Ahn, Ho-kyun,Kwak, Gun-pyong,Yoon, Tae-sung 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.7

In this paper, a robust trajectory tracking control method of a wheeled mobile robot is newly proposed combining the PDC and the ISMC. The PDC is a relatively simple and easy control method for nonlinear system compared to the other non-linear control methods. And the ISMC can have robust and stable control characteristics against model uncertainties and disturbances from the initial time by placing the states on the sliding plane with desired nominal dynamics. Therefore, the proposed PDC+ISMC trajectory tracking control method shows robust trajectory tracking performance in spite of external disturbance. The tracking performance of the proposed method is verified through simulations. Even though the disturbance increases, the proposed method keeps the performance of the PDC method when there is no disturbance. However, the PDC trajectory tracking control method has increasing tracking error unlike the proposed method when the disturbance increases.

충전성을 개선한 원형 CFT구조의 기둥-보 접합부 구조적 거동

박민수,김희동,이명재,Park, Min-Soo,Kim, Hee-Dong,Lee, Myung-Jae 한국강구조학회 2011 한국강구조학회 논문집 Vol.23 No.6

A concrete-filled tube is a concrete-filled steel tube structure. The steel tube confines the concrete to increase the compressive strength, and the concrete contains the buckling of the tube. CFT structures require a diaphragm to prevent buckling of steel at connections. An outer diaphragm has better concrete filling than a through diaphragm due to a large bore, but being larger than the through diagram, it has poorer constructability and cooperation with building equipment. In this study, a CFT structure that uses different types of diaphragms in its upper and lower connections to improve the concrete filling was tested and analyzed via the FEM program. The building structure had a floor slab that was unified with the upper diaphragm, so the outer diaphragm was placed at the upper bound. Moreover, the through diaphragm was placed at the lower connection to avoid obstruction from building equipment. The CFT structure with the improved concrete filling showed the same structural behavior as the CFT structure with the use of the same type of diaphragms at the upper and lower connections. 콘크리트충전강관(Concrete Filled Tube 이하 CFT)구조는 강관 속에 콘크리트를 충전시킨 구조물로서 강관은 콘크리트를 구속시켜 압축내력을 증가시키며 콘크리트는 강관의 국부좌굴을 감소시키는 역할을 한다. CFT구조의 기둥-보 접합부는 강관의 국부좌굴을 방지하기위해 다이아프램이 필요하다. 외측다이아프램 형식은 관통다이아프램 형식보다 콘크리트의 충전성이 좋으나 시공성과 건축설비와 공조하는 측면에서 불편함이 있다. 이 연구는 원형CFT구조의 접합부의 상, 하부에 각각 다른 형식의 다이아프램을 적용시켜 콘크리트 충전성을 개선시킨 구조의 구조성능을 실험과 유한요소해석 프로그램을 통하여 알아보았다. CFT구조 접합부의 상부 다이아프램은 외측다이아프램 형식으로 하고 하부 다이아프램은 관통다이아프램 형식으로 하였다. 이것은 건축물에서 바닥슬래브가 있으므로 상부 다이아프램은 바닥슬래브와 일체가 되고 하부 다이아프램으로 관통다이아프램을 적용하여 건축설비와의 마찰을 피하고자 한 것이다. 결과적으로 충전성을 개선시킨 CFT구조의 구조성능은 상, 하부 모두 관통다이아프램을 적용한 구조와 비교하면 동일 하다는 것을 알 수 있다.

PET/CT에서의 고관절 삽입물에 의한 인공물과 Metal Artifact Reduction Algorithm의 유용성에 대한 고찰

박민수,함준철,조용인,강천구,박훈희,임한상,이창호,Park, Min Soo,Ham, Jun Cheol,Cho, Yong In,Kang, Chun Goo,Park, Hoon-Hee,Lim, Han Sang,Lee, Chang Ho 대한핵의학기술학회 2012 핵의학 기술 Vol.16 No.2

Purpose : PET/CT performed CT-based attenuation correction generates the beam hardening artifact by metallic implant. The attenuation correction causes over or underestimate of the area adjacent to metallic hip prosthetic material and change of $^{18}F$-FDG uptake. Also, the image quality and the diagnosability on genitourinary disease are reduced. Therefore, this study will evaluate the usefulness of MAR (Metal Artifact Reduction) algorithm method to improve the image quality on PET/CT. Materials and Methods : PET/CT was performed by fixing hip prosthesis in SPECT/PET phantom. In PET images with and Without MAR algorithm, the Bright streak, Dark streak, Metal region and Background area that appeared on CT were confirmed, and the change of each SUV (standardized uptake value) was analyzed. Also, in 15 patients who underwent total hip arthroplasty, each MAR algorithm and Without MAR algorithm and non attenuation correction was evaluated. Results : In PET image Without MAR algorithm, SUV of Bright streak region was $0.98{\pm}0.48$ g/ml; Dark streak region was $0.88{\pm}0.02$ g/ml; Metal region was $0.24{\pm}0.16$ g/ml, Background area was $0.91{\pm}0.18$ g/ml. In SUV of PET image with MAR algorithm, Bright streak region was $0.88{\pm}0.49$ g/ml, Dark streak region was $0.63{\pm}0.21$ g/ml, Metal region was $0.06{\pm}0.07$ g/ml, Background was $0.90{\pm}0.02$ g/ml. SUV generally decreased when applying MAR algorithm. In PET image Without MAR algorithm, SUVs of Bright region were higher than those measured in the Background, and it was false positive uptake. But, in PET image with MAR algorithm, SUVs of Bright region were similar to the Background, and false positive uptake disappeared. Conclusion : MAR algorithm could reduce an increase of $^{18}F$-FDG uptake due to attenuation correction in the hip surrounding tissue. However, decrease of SUV in Dark streak region should be considered in the future. Therefore, this study propose that the diagnostic accuracy can be improved in genitourinary diseases adjacent to metallic hip prosthesis, if provided PET images with and Without MAR algorithm, and non attenuation correction images at the same time.

월경 주기에 따른 $^{18}F$-FDG PET/CT에서의 유방 섭취 변화에 관한 고찰

박민수,박훈희,김정열,임한상,김재삼,이창호,Park, Min-Soo,Park, Hoon-Hee,Kim, Jung-Yul,Lim, Han-Sang,Kim, Jae-Sam,Lee, Chang-Ho 대한핵의학기술학회 2011 핵의학 기술 Vol.15 No.1

Purpose: $^{18}F$-FDG PET/CT has been known a useful modality to diagnose high-glucose-using cells such as cancer cells by glucose metabolism of FDG. Mainly, FDG takes on cancer and inflammatory cells; However, There have been FDG uptakes on normal tissues by individual physiological characteristics, occasionally. Especially, in fertile females, unusual FDG uptake of breast changes as the menstrual cycle, and disturb diagnosis. Therefore, the study aimed to evaluate the change of breast FDG uptake in menstrual cycle on $^{18}F$-FDG PET/CT. Materials and Methods: 160 females ($34{\pm}3.5$ years old) who do not undergo a gynecologic anamnesis and have regular menstrual cycle over the previous 6 months were examined, from March 2009 to February 2010. They were divided 4 groups (each 40 patients) as flow phase, proliferative phase, ovulatory phase and secretory phase using Pregnancy Calculator 0.14. and history taking. Discovery Ste (GE Healthcare, Milwaukee, Mi, USA) was used as PET/CT. We analyzed SUVs on accumulated region on breast, and 3 nuclear medicine specialists did the Blind test. Results: SUVs on the Breast were flow phase ($1.64{\pm}0.25$), proliferative phase ($0.93{\pm}0.28$), ovulatory phase ($1.66{\pm}0.26$) and secretory phase ($1.77{\pm}0.28$). It showed high uptake value in secretory, flow phase and ovulatory phase (p<0.05). In gross analysis, the accumulation of breast was divided into 3 grades as comparing with lung and liver. The breast's uptake was equal to lung (Grade I); between lung and liver (Grade II); equal to or greater than liver (Grade III). The results showed high uptake value in secretory, flow phase and ovulatory phase (p<0.05). Conclusion: In fertile females, FDG uptake of breast changed as menstrual cycle, and it available to diagnose breast disease. Therefore, we consider reducing false-negative finding of breast disease, by doing examination on appropriate period through history taking about individual menstrual cycle.

전립선암 환자의 뼈 전이에 대한 $^{18}F$-Fluoride PET/CT의 유용성

박민수,김정열,박훈희,강천구,임한상,김재삼,이창호,Park, Min-Soo,Kim, Jung-Yul,Park, Hoon-Hee,Kang, Chun-Goo,Lim, Han-Sang,Kim, Jae-Sam,Lee, Chang-Ho 대한핵의학기술학회 2009 핵의학 기술 Vol.13 No.3

Purpose: Today, Prostate cancer has been gradually increasing, according to the change of internal incidence rate of cancer. Generally, prostate cancer has lead to dead over 90%, in case of metastasis of lymph node and bone. So, innovative development of new radiopharmaceutical and imaging modality is progressed for detection of that metastasis, in nuclear medicine, now. Therefore, this study shows the usefulness of $^{18}F$-Fluoride PET/CT improved diagnosability on bone metastasis of prostate cancer. Materials and Methods: In this study, 33 male patients with prostate cancer were examined (The mean age: $67.8{\pm}10.2$ years old). Every patient was done each whole body bone scan (WBBS) and $^{18}F$-Fluoride positron emission tomography/computed tomography ($^{18}F$-Fluoride PET/CT). And then, using Receiver Operating Characteristic Curve (ROC curve), each sensitivity and specificity of two modalities was measured and compared with. Results: In 22 patients (66.6%) of all, bone metastasis was detected. And, in WBBS, sensitivity was 63.6%, specificity, 81.8%; in $^{18}F$-Fluoride PET/CT, sensitivity was 100% and specificity was 90.9%. As a result of ROC curve, AUROC (The Area under an ROC) of WBBS was 0.778, and that of $^{18}F$-Fluoride PET/CT, 0.942. Conclusions: $^{18}F$-Fluoride PET/CT was higher both sensitivity and specificity than WBBS, and it was valuable to detect bone metastasis of prostate cancer more definitely, with 3D imaging realization. Also, in $^{18}F$-Fluoride PET/CT, physiological images were acquired in more short time than WBBS, so, it was possible to reduce patient's waiting time and complaint. Therefore, it is considered that $^{18}F$-Fluoride PET/CT is able to improve diagnosability by offering more accurate images, as cuts in a share of high cost.

웹 사용성 개선에 관한 연구 - 국가과학기술정보시스템을 중심으로 -

박민수,현미환,Park, Min-Soo,Hyun, Mi-Hwan 한국비블리아학회 2011 한국비블리아학회지 Vol.22 No.4

본 연구의 목적은 과학기술정보사이트의 이용자 사용성 평가를 통해 시스템 개선사항을 도출하고 이를 시스템 운영 및 개발 과정에 반영시킴으로써 현 사이트에 대한 사용성 개선에 있다. 총 16명의 이용자에 대한 사용성 데이터를 수집하였다. 검색로그, 인터뷰, 씽크 어라우드 등 다수의 데이터 수집 테크닉들을 적용하였으며 연구자와 이용자 1:1 방식으로 이루어진 사용성 실험은 정해진 테스트 프로토콜에 의거하여 이루어졌다. 수집한 데이터는 정량적, 정성적 방법을 통하여 분석하였다. 검색로그 데이터는 효과성, 효율성, 만족도, 오류 등의 항목을 사용성평가 측정 기준에 따라 정량적으로 수치화한 후, 기술적 통계 분석을 하였다. 씽크 어라우드와 사후 인터뷰로부터 수집한 구두 데이터는 텍스트화한 후 정성적인 분석을 통해 개선시사점을 도출하였다. 시스템 개선 전과 후에 대한 사용성 수준을 비교해 보면 효과성이 15점 증가, 효율성이 35초 단축, 만족도가 5점 상승, 오류횟수가 1.1회 감소하는 등 시스템에 대한 사용성이 전반적으로 향상하였음을 알 수 있다.

Bi-Te계 n형 열전분말의 열전특성에 미치는 Cu 도핑의 영향

박민수,구혜영,하국현,박용호,Park, Min Soo,Koo, Hye Young,Ha, Gook Hyun,Park, Yong Ho 한국분말야금학회 2015 한국분말재료학회지 (KPMI) Vol.22 No.4

$Bi_2Te_3$ related compounds show the best thermoelectric properties at room temperature. However, n-type $Bi_2Te_{2.7}Se_{0.3}$ showed no improvement on ZT values. To improve the thermolectric propterties of n-type $Bi_2Te_{2.7}Se_{0.3}$, this research has Cu-doped n-type powder. This study focused on effects of Cu-doping method on the thermoelectric properties of n-type materials, and evaluated the comparison between the Cu chemical and mechanical doping. The synthesized powder was manufactured by the spark plasma sintering(SPS). The thermoelectric properties of the sintered body were evaluated by measuring their Seebeck coefficient, electrical resistivity, thermal conductivity, and hall coefficient. An introduction of a small amount of Cu reduced the thermal conductivity and improved the electrical properties with Seebeck coefficient. The authors provided the optimal concentration of $Cu_{0.1}Bi_{1.99}Se_{0.3}Te_{2.7}$. A figure of merit (ZT) value of 1.22 was obtained for $Cu_{0.1}Bi_{1.9}Se_{0.3}Te_{2.7}$ at 373K by Cu chemical doping, which was obviously higher than those of $Cu_{0.1}Bi_{1.9}Se_{0.3}Te_{2.7}$ at 373K by Cu mechanical doping (ZT=0.56) and Cu-free $Bi_2Se_{0.3}Te_{2.7}$ (ZT=0.51).

젖소 조사료급여의 경제성 및 최적 사료급여 결합비율 설정

박민수,한인규 ( Min Soo Park,In Kyu Han ) 한국축산경영학회 1995 韓國畜産經營學會誌 Vol.11 No.1

분야별 논문 핫 트렌드 예측 기법

박민수(Park Min-soo),이수민(Lee Su-min),안진수(Ahn Jin-soo),박진우(Park Jin-u),이동영(Lee Dong-yeong),유재수(Yoo Jea-soo),최도진(Choi Do-jin) 한국콘텐츠학회 2023 한국콘텐츠학회 종합학술대회 논문집 Vol.2023 No.5