연구발표논문초록 ( 분리공정 (Ⅲ) ) : 다공성 환원주석에 의한 물로부터 수소의 제조

박병건,문희,박흥철 ( Byung Geon Park,Hee Moon,Heung Chul Park ) 한국화학공학회 1986 춘계학술발표회 Vol.- No.-

Low-Cost Fault Diagnosis Algorithm for Switch Open-Damage in BLDC Motor Drives

박병건,이귀준,김래영,현동석 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6

In this paper, a fault diagnosis algorithm for brushless DC (BLDC) motor drives is proposed to maintain control performance under switch open-damage. The proposed fault diagnosis algorithm consists of a simple algorithm using measured phase current information and it detects open-circuit faults based on the operating characteristic of BLDC motors. The proposed algorithm quickly recovers control performance due to its short detection time and its reconfiguration of the system topology. It can be embedded into existing BLDC drive software as a subroutine without additional sensors. The feasibility of the proposed fault diagnosis algorithm is proven by simulation and experimental results.

Open Circuit Fault Diagnosis Using Stator Resistance Variation for Permanent Magnet Synchronous Motor Drives

박병건,김래영,현동석 전력전자학회 2013 JOURNAL OF POWER ELECTRONICS Vol.13 No.6

This paper proposes a novel fault diagnosis scheme using parameter estimation of the stator resistance, especially in the case of the open-phase faults of PMSM drives. The stator resistance of PMSMs can be estimated by the recursive least square (RLS)algorithm in real time. Fault diagnosis is achieved by analyzing the estimated stator resistance of each phase according to the fault condition. The proposed fault diagnosis scheme is implemented without any extra devices. Moreover, the estimated parameter information can be used to improve the control performance. The feasibility of the proposed fault diagnosis scheme is verified by simulation and experimental results.

치료 전 직장암 MRI의 판독

박병건,조승현 대한영상의학회 2019 대한영상의학회지 Vol.80 No.3

Modern management of rectal cancer highly depends on the interpretation of high-spatial-resolution MRI, which determines the benefits from preoperative chemoradiotherapy or surgery alone. Accordingly, the baseline MRI report plays a pivotal role in planning the treatment. Although several structured reporting templates for rectal cancer staging on MRI are available, many radiologists still use the free-text format. In this review, we discuss the essential items for reporting rectal cancer on MRI before treatment to guide general radiologists in preparing a qualified report. 직장암의 현대적 치료는 고해상도 MRI의 해석에 따라 크게 달라지며, MRI 판독 보고서는치료 방법 선택에 있어 중추적인 역할을 하고 있다. 특히 수술 전 화학방사선요법에 대상이되는 환자를 선택하거나, 항문보존 수술 여부를 결정하는 일차적 치료 선택에 있어 MRI는필수적이다. 비록 직장암 MRI 판독을 위한 몇몇 구조화된 보고서 양식이 있지만, 많은 영상의학과 의사들은 여전히 텍스트 형식의 판독문을 사용하고 있다. 이에 본 논문에서는 치료 전직장암 MRI 판독문에 포함되어야 할 내용들을 고찰하여 판독 소견을 보다 쉽고 정확하게 기술하는 데 도움이 되고자 한다.

기능기반변형 방법을 이용한 고관절 형상의 파라메트릭 모델링

박병건,구본열,김재정 (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1

The morphology of a bone is closely associated with its biomechanical response. Thus, much research has been focused on analyzing the effects of variation of bone morphology with subject-specific models. Subject-specific models, which are generally achieved from 3D imaging devices like CT and MRI, incorporate more of the detailed information that makes a model unique. Hence, it may predict individual responses more accurately. Despite these powerful characteristics, specific models are not easily parameterized to the extent possible with statistical models because of their morphologic variations of subject-specific models across changes due to aging or disease. The aim of this article is to propose a generic demonstrate this by using the proposed method on a model of a human proximal femur. Automatic segmentation algorithms are also presented to parameterize the specific model efficiently. A total of 48 femur models were evaluated for defining morphing vector fields. Also, several anatomical and mechanical functions of femur were considered as morphing constraints, and the NURBS interpolating technique was applied in the method to guarantee the generality of our morphed results.

레이저를 이용한 후두 수술의 합병증

박병건,이상준,정필상,Park, Byung-Kuhn,Lee, Sang-Joon,Chung, Phil-Sang 대한후두음성언어의학회 2011 대한후두음성언어의학회지 Vol.22 No.1

Laser is a relatively recent addition to laryngeal surgery. Since their invention, laser use and applications have expanded rapidly. The use of lasers in surgery has offered a time- and cost-efficient alternative to cold surgical techniques and has been used in the treatment of numerous laryngeal pathologies, including stenoses, recurrent respiratory papillomatosis, leukoplakia, nodules, malignant laryngeal disease, and polypoid degeneration (Reinke's edema). Despite the notable benefits, laser surgery is not without disadvantages. Laser heat can increase scarring and cause damage to adjacent tissue. With laser laryngeal microsurgery, there is potential for airway fire, endolaryngeal bleeding, perichondritis, chondritis, granuloma, surgical emphysema, laryngeal stenosis and web formation, postoperative edema and swallowing problem. Surgeons should be known about these complications and could manage properly.

NEW DEVELOPMENT OF HYPERGAM AND ITS TEST OF PERFORMANCE FOR γ-RAY SPECTRUM ANALYSIS

박병건,최희동 한국원자력학회 2012 Nuclear Engineering and Technology Vol.44 No.7

The HyperGam program was developed for the analysis of complex HPGe γ-ray spectra. The previous version of HyperGam was mainly limited to the analysis of γ-ray peaks and the manual logging of the result. In this study, it is specifically developed into a tool for the isotopic analysis of spectra. The newly developed features include nuclide identification and activity determination. An algorithm for nuclide identification was developed to identify the peaks in the spectrum by considering the yield, efficiency, energy and peak area for the γ-ray lines emitted from the radionuclide. The detailed performance of nuclide identification and activity determination was accessed using the IAEA 2002 set of test spectra. By analyzing the test spectra, the numbers of radionuclides identified truly (true hit), falsely (false hit) or missed (misses) were counted and compared with the results from the IAEA 2002 tests. The determined activities of the radionuclides were also compared for four test spectra of several samples. The result of the performance test is promising in comparison with those of the well-known software packages for γ-ray spectrum analysis.

Xanthium strumarium Linne 에탄올 추출물의 약리학적 활성

박병건,임창진 강원대학교 기초과학연구소 2010 기초과학연구 Vol.21 No.-

Xanthium strumarium Linne 에탄올 추출물 (XSE)의 anticancer, anti-inflammatory, antioxidant, anti-angiogenic 활성 등 약리학적 활성을 구명하였다. XSE는 LPS에 의해 활성화된 RAW264.7 대식세포에서 NO의 생성과 활성 산소종 (ROS)의 수준을 감소시켰다. 또한 안정된 free radical을 감소시켰다. 이 실험에서 사용한 XSE의 농도는 대식세포의 생존에는 영향을 주지 않았다. 이러한 결과, Xanthium strumarium Linne의 항염증 활성이 NO의 생성이 억제됨으로서 일어나는 것이라는 것을 시사한다.

수종의 치과용 합금에 대한 생체외 세포반응

박병건 보건장학회 1988 보건장학회보연구논문집 Vol.10 No.-

기니픽 유양동 폐쇄술에 사용한 물질의 효과 및 조직병리학적 비교 연구

박병건,강명구,황찬호,김재룡,박동은 대한이비인후과학회 2004 대한이비인후과학회지 두경부외과학 Vol.47 No.11

Background and Objectives:The present study was undertaken to determine and to compare the characteristics of bone wax, fibrofatty tisues or bone graft materials (Lubboc)Materials and Method:The guinea pigs were used to perform obliteration of the dorsal bullae of the temporal bone using bone wax, fibrofatty tisues or Lubboc. Twelve weeks after transplantation, the animals were sacrificed, and histological sections were prepared. Histological evaluations were performed to determine changes of the dorsal bulae mucosa of the temporal bone and the implanted materials. Results:reactions within the dorsal bullae mucosa of the temporal bone. A large amount of absorption was observed in the fibrofatty tissue. On the other hand, in the case using Luboc, real bonds between the new bone and native bone were observed, as wel as a ma-ture trabecular bone traversing throughout the entire implant materials. Bone formation as induced by the Lubocimplantation appeared to be a physiological reaction, which was further supported by observation of extensive neovascularization within the Conclusion:Based on our curent observations, we consider Lubbocas a superior implant material for bone wax and fibrofatty tisues.