실린더형 압전소자 광지연선을 이용한 광 간섭형 단층촬영(OCT) 시스템 제작

박성진,김영관,김용평,Park, Sung-Jin,Kim, Young-Kwan,Kim, Yong-Pyung 한국광학회 2006 한국광학회지 Vol.17 No.2

원통형의 압접소자를 이용한 광지연선을 사용하여 광 간섭형 단층촬영 시스템을 제작하였다. 광지연선은 18 m 길이의 단일 모드 광섬유를 압전소자의 둘레에 134회 감아 구성하였으며 0.78 mm의 광경로 길이변화를 얻었다. 제작한 광 간섭형 단층촬영 시스템은 신호 대 잡음비 96.9 dB, 종방향 분해능 $18.6{\pm}0.5\;{\mu}m$, 횡방향 분해능 $5\;{\mu}m$의 특성을 보였다. We demonstrate a compact optical coherence tomography(OCT) system based on the optical fiber delay line controlled by a cylindrical piezo-electric transducer(PZT). An 18-m length of single mode fiber is wrapped under constant tension around a PZT. Approximately 134 windings are used. Wraps of the long length of fiber allow the small expansion of the PZT to be magnified to an optical path length delay of 0.78 m. The OCT system shows characteristics for 2-dimensional imaging, exhibiting 96.9dB of signal-to-noise ratio(SNR), $18.6{\pm}0.5\;{\mu}m$ of axial resolution, and $5\;{\mu}m$ of lateral resolution with samples.

전자기 듀오캐스팅으로 제조한 Al-Mn/Al-Si 하이브리드 알루미늄합금의 미세조직과 인장 특성

박성진,김종호,박준표,장시영,Park, Sung-Jin,Li, Tingju,Kim, Chong-Ho,Park, Jun-Pyo,Chang, Si-Young 한국재료학회 2012 한국재료학회지 Vol.22 No.2

The microstructure and tensile properties of Al-Mn/Al-Si hybrid aluminum alloys prepared by electromagnetic duocasting were investigated. Only the Al-Mn alloy showed the typical cast microstructure of columnar and equiaxed crystals. The primary dendrites and eutectic structure were clearly observed in the Al-Si alloy. There existed a macro-interface of Al-Mn/Al-Si alloys in the hybrid aluminum alloys. The macro-interface was well bonded, and the growth of primary dendrites in Al-Si alloy occurred from the macro-interface. The Al-Mn/Al-Si hybrid aluminum alloys with a well-bonded macro-interface showed excellent tensile strength and 0.2% proof stress, both of which are comparable to those values for binary Al-Mn alloy, indicating that the strength is preferentially dominated by the deformation of the Al-Mn alloy side. However, the degree of elongation was between that of binary Al-Mn and Al-Si alloys. The Al-Mn/Al-Si hybrid aluminum alloys were fractured on the Al-Mn alloy side. This was considered to have resulted from the limited deformation in the Al-Mn alloy side, which led to relatively low elongation compared to the binary Al-Mn alloy.

아킬레스건 견열 골절의 수술적 치료

박성진,최남용,주인탁,나기호,송현석,김정호,하재도,Park, Sung-Jin,Choi, Nam-Yong,Joo, In-Tak,Nah, Ki-Ho,Song, Hyun-Seok,Kim, Jung-Ho,Ha, Jae-Do 대한족부족관절학회 2003 대한족부족관절학회지 Vol.7 No.2

Avulsion fracture of the calcaneal tuberosity is an uncommon injury. Usually it occurs from indirect trauma, and can be seen in old patients with osteoporosis or in patients with diabetic neuropathy. Follow-up studies showed healing of the fracture in most cases, but skeletal deformity may develop in some cases. Therefore we should take plain X-ray evaluations in diabetic patients with foot and ankle pain, even though there have been no definite trauma history. Four cases of calcaneus avulsion fracture were treated operatively in diabetic patients, and reported.

Pectolinarin 고함유 곤드레 미세분말의 항산화 및 항비만 활성

박성진,김현덕,이윤환,Park, Sung-Jin,Kim, Hyun-Duk,Lee, Yoon-Hwan 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.1

The aim of this study was to evaluate the basic data of Cirsium setidens Nakai fine powder (FPC), which will then be used in the development of functional fooditems. We measures and evaluated the level of pectolinarin content, phenol content, flavonoids content, antioxidants and anti-obesity properties of FPC. Our results from the study showed that the pectolinarin, phenol, and flavonoids contents of FPC measured at 10.95±0.1 5mg/g, 12.92±0.18 mg gallic acid equivalent (GAE)/g and 26.47±0.77 mg rutin equivalent (RE)/g, respectively. The exhibited antioxidant activity of FPC increased significantly depending on the dosage, and additionally. FPC did not show any cytotoxicity up to the dosage level of 500 μg/mL. During adipocyte differentiation, FPC significantly inhibited ROS production and lipid accumulation, compared with the control substance. These results suggest that FPC could be considered a promising resource of natural antioxidants and could serve a variety of health-improving roles in the production of functional food ingredients.

척수팽대와 낭종을 동반한 척수-연수 연접부의 혈관아세포종 - 증례보고 -

박성진,정호,이상걸,박문선,하호균,양기화,Park, Sung-Jin,Jung, Ho,Lee, Sang-Keol,Park, Moon-Sun,Ha, Ho-Gyun,Yang, Ki-Hwa 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.6

Hemangioblastoma of the central nervous system rarely occurs in cervicomedullary junction. The unique pathologic features of the tumor involving midline structures are grossly solid in consistency and accompanying extensive spinal cord enlargement. A 63-year-old women presented with progressive right motor weakness and tingling sensation. The MR image showed a well enhancing mass having a cyst and diffuse cord enlargement in the cervicomedullary junction. A total surgical resection was performed and hemangioblastoma was histologicaly verified. Postoperative MR image showed the disappearance of cord enlargement. The right motor weakness was also improved. The authors report a rare case of hemangioblastoma in cervicomedullary junction and the pathophysiology of the spinal cord enlargement are discussed.

강화유리 표면의 친수성 특성 조사에 관한 연구

박성진,서진우,이승규,Park, Sung Jin,Seo, Jin Woo,Lee, Seung Kyu 한국광학회 2013 한국광학회지 Vol.24 No.1

본 연구에서는 플라즈마 장치의 광 특성과 접촉각 특성을 조사하여 스마트폰에 사용되는 강화유리 표면의 친수성 특성을 알아 보였다. 본 연구에서 공정 가스의 분압과 입력 전압의 정도에 대한 강화유리 표면의 친수화 정도를 조사하였다. 각 변수에 따라 아르곤 가스의 이온화 정도에 따라 차이가 있음을 알 수 있었다. 본 연구에서, 강화유리 표면은 처리되기 전과 비교하여 접촉각의 변화나 광방출 특성에서 나타난 것들을 토대로 친수화가 되었음을 알 수 있었다. In this study, we assessed the hydrophilic characteristics of the surface of toughened glass used in smartphones by investigating the optical properties and contact angle characteristics of the plasma device. In this study, the characteristics were different depending on the partial pressure of the gas, input voltage, and degree of ionization of argon gas. In this study, the surface of the toughened glass became more hydrophilic, as indicated by contact angle and light spectrum, after plasma treatment than before the treatment.

EPC Network 기반 RFID 응용 시스템의 성능 향상을 위한 EPCIS 주소별 그룹 질의 기법

박성진,김대환,손민영,염근혁,Park, Sung-Jin,Kim, Dae-Hwan,Son, Min-Young,Yeom, Keun-Hyuk 한국정보처리학회 2011 정보처리학회논문지D Vol.18 No.2

These days RFID application has been developed rapidly. It has been applied to many business areas such as logistics and supply chains. The Electronic Product Code (EPC) Network Architecture, an open global standard, is proposed by EPCglobal for developing RFID enabled systems. People who want to obtain the product information which are master information and event information have to apply with EPC Network Architecture. However, EPCIS which has master information and event information has to be accessed base on each EPC. Therefore, there is lots of duplicate accessing to EPCIS because RFID application has to access the same EPCIS over again which makes all performance down in EPC Network. This paper proposes how to reduce access times to EPCIS using EPC grouping based on EPCIS address. We build EPC Network environment to experiment about performance of RFID application system and we prove the improvement of EPC Network. Our result shows the reducing the EPCIS communication time by maximum 99 percentages. 오늘날 RFID 응용 시스템은 점차 발전되고 물류, 유통, 항만 그리고 제조 등 다양한 산업분야에서 적용되고 있다. RFID 응용 시스템 개발을 위한 국제 표준으로 EPCglobal 에서는 EPC Network 아키텍처를 제시하고 있다. EPC Network 아키텍처를 통해 개체의 고유정보(master information) 및 이력정보(event information)를 수집해야 한다. 그러나 개체의 고유정보 및 이력정보를 저장하고 있는 EPCIS의 경우는 수집된 EPC와 각 개체가 가지는 이력정보의 수에 의존적으로 통신 횟수가 증가하며, 개별적인 EPC에 대한 처리로 인해 동일한 EPCIS와 여러 번 통신해야 하는 문제점이 존재한다. 이러한 문제점은 EPCIS와의 통신시간의 증가로 인해 RFID 응용 시스템의 성능을 저하 시키게 된다. 따라서 본 논문에서는 EPCIS와의 통신 시간을 감소시키기 위하여 동일한 EPCIS와의 통신을 제거하는 EPCIS 주소별 그룹 질의 기법을 제시한다. 또한, 본 논문에서 제시한 기법을 적용하고 실제 EPC Network 환경을 구축하고 다양한 실험을 통하여 효용성을 검증하였으며 EPCIS의 통신 시간이 최대 99% 감소하는 것을 확인할 수 있었다.

외상성 뇌실질내 혈종에 대한 상측방 키홀을 통한 내시경적 혈종 제거

박성진,하호균,정호,이상걸,박문선,Park, Sung-Jin,Ha, Ho-Gyun,Jung, Ho,Lee, Sang-Keol,Park, Moon-Sun 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.2

Objective : As a minimally invasive strategy, endoscopic technique was introduced for removal of the traumatic intracerebral hematoma. Material and Method : A 54-year-old man with three-day history of seizure and progressive mental deterioration after traffic accident was presented. Computerized Tomography(CT) of the brain showed a huge intracerebral hematoma on the right frontal lobe and ventricle. The operation was performed via right frontal superolateral keyhole with 2cm eyebrow skin incision. Using 0-degree and 30-degree angled lens 4mm rigid endoscopes, nearly all of the hematoma was evacuated under the direct endoscopic visualization and a ventricular catheter was exactly placed into the frontal horn of the right lateral ventricle at the end of procedure. Results : The seizure was discontinued and neurological status had been improved during postoperative periods. Postoperative CT demonstrated that most of the hematoma was removed and the ventricular drainge tube was exactly placed in the right foramen of Monro. Conclusion : With endoscopic technique, the authors successfully evacuated traumatic intracerebral hematoma and exactly placed the ventricular drainage catheter under direct visualization. This technique may be considered as an another option for removal of traumatic intracerebral hematoma.

조대술을 이용한 함치성 낭종의 치료

박성진,이광희,김대업,Park, Sung-Jin,Lee, Kwang-Hee,Kim, Dae-Eop 대한소아치과학회 2003 大韓小兒齒科學會誌 Vol.30 No.3

함치성 낭종이란 퇴축법랑상피와 법랑질 표면 사이에 체액이 축적되어 치관이 내강의 안쪽에 있으며 치근은 바깥쪽에 위치하는 매복치 치관을 둘러싸는 치원성 낭을 의미한다. 함치성 낭종의 치료법으로는 적출술, 조대술, 감압술 및 외과적 절제술이 있다. 본 증례는 하악 제2유구치의 만기잔존을 주소로 내원한 환아들을 검사하였다. 두 환아에서 해당 제2유구치의 협측부에서 팽융을 관찰하였다. 두 환아, 모두 방사선사진상 하악 제2소구치의 치관을 포함한 단방성의 방사선투과상이 보였으며 조직검사 결과 함치성 낭종으로 진단되었다. 본 증례에서 발치와를 통한 조대술을 시술하였다. 제2유구치를 발거하고 바세린 거즈로 발치와를 보호한 후 익일에 보격장치를 겸한 obturator를 장착해 주었다. 시술 후 매복된 영구치는 정상 맹출속도보다 빠르게 맹출하는 양상을 보이고 있다. Dentigerous cyst is a cyst arising by tissue fluid accumulation between the enamel and the residual enamel epithelium. It includes the crown of the impacted tooth and excludes the root. The treatments of the dentigerous cyst are enucleation, marsupialization, decompression, surgical excision and etc. In these cases children were evaluated for the chief complaints of the remained mandibular primary second molar. Each cases showed swelling on the buccal side of the primary secondary premolar. In the radiologic evaluation a radiolucent lesion including the crown of the mandibular secondary premolar was found, and it was diagnosed as dentigerous cyst. And the histopathologic examination showed the same result. Marsupialization was operated through alveolar socket and the alveolar socket was protected with vaseline gauze, the obturator combined with space maintainer was followed by the operation. After the operation, the impacted permanent tooth was showing faster eruption speed than the other normal teeth.

한국형 회전교차로의 노면표시 및 교통안전표지에 관한 제언

박성진,이석기,이동민,Park, Sung-Jin,Lee, Suk-Ki,Lee, Dong-Min 대한교통학회 2011 교통 기술과 정책 Vol.8 No.4