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.-

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.

Proposal of a New Weighted Prognostic Factor Scoring System (WPFSS) in Bell’s Palsy

박병건,정성훈,이상훈,홍종철,강명구 대한이비인후과학회 부산,울산,경남 지부회 2016 임상이비인후과 Vol.27 No.1

Background and Objectives : To analyze various parameters that influence Bell’s palsy prognosis at an early disease stage. Material and Methods:In total, 384 patients at Dong-Eui Medical Center in Busan, Korea, were retrospectively assessed from January 2004 to December 2006. The following clinical aspects were analyzed: gender, age, hypertension, postauriclular pain, vertigo, number of days from onset of facial weakness to the commencing treatment, electroneurography (ENoG) results, initial facial palsy grading, and the degree of facial palsy after 3 months. Statistical analyses of the total sum score were performed for patients with different recoveries 3 months post-onset. To accomplish this, a weighted prognostic factor scoring system (WPFSS) that served as an integrated system to analyze multiple predictive factors of Bell’s palsy prognosis was created. Results:Results from the univariate analysis of recovery indicated that only age, ENoG response, and initial grading of facial palsy were directly correlated with recovery rate in patients with Bell’s palsy 3 months post-onset. Using the WPFSS, a distinct gap was observed, which allowed for the factors to be grouped into four distinct sections that were dependent on the recovery rate. Groups with scores below 11 and above 15 points were considered to have a satisfactory recovery rate of greater than 70% and less than 9.1%, respectively. Conclusions:The WPFSS may provide an objective criterion for prognostic assessment and implementation of risk-adapted treatment strategies in Bell’s palsy patients.

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.

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.

경부 괴사성 근막염의 임상적 고찰

박병건,이도준,이상준,Park, Byung Kuhn,Lee, Do-Joon,Lee, Sang Joon 대한기관식도과학회 2011 大韓氣管食道科學會誌 Vol.17 No.1

Background and Objectives Cervical necrotizing fasciitis is a fulminant disease associated with necrosis of connective tissue, spread along the fascial plane, and high mortality. We analyzed the clinical characteristics and treatment outcome of this rare fatal disease. Materials and Methods We retrospectively reviewed the medical records of 19 patients treated for cervical necrotizing fasciitis from January 1999 to January 2009. Mean age was 53.7 years. Results The most common predisposing illness was tonsillitis (36.8%), followed by odontogenic infection (15.7%). Diabetes mellitus was most common underlying disease. Liver cirrhosis and chronic renal failure were found in 2 patients each. All patients were treated with combination of parenteral antibiotics and wide surgical debridement by transcervical and/or thoracotomy approach. Multiple surgical debridements were performed in 7 patients. Tracheotomy was performed in most of the patients (88.8%). Period of total hospitalization and Intensive care unit was 23 days and 10.1 days. Two patients died of disease and overall survival rate was 89.4%. Conclusion Early surgical management and care in intensive care unit are essential for cervical necrotizing fasciitis. Possible complications such as respiratory failure, mediastinitis or sepsis should be carefully evaluated.

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.

건강한 성인에서 발병한 Listeria Monocytogenes 급성심내막염 1례

박병건,천일석,이유판,최소영,김기량,장세호,황진용,최동주,서봉관,김성호,김선주 대한순환기학회 1997 Korean Circulation Journal Vol.27 No.6

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.

아프리카산 발톱개구리 치아의 백악질에 관한 형태학적 연구

박병건,이영훈 대한구강해부학회 2021 대한구강해부학회지 Vol.42 No.1

치아는 백악질과 치아주위인대, 이틀뼈로 구성된 치아주위조직에 의해서 지지된다. 백악질은 조직학적특성에 따라 무세포성시멘트질과 세포성시멘트질로 구분된다. 아프리카산 발톱개구리의 치아는 일생동안탈락과 대체되는 과정을 반복하는 다생치아이고, 치아판와 모자시기, 종시기, 기능단계치아와 같은 여러 시기의 치아와 치배로 이루어져 있다. 또한, 치아주위조직중 백악질도 주기적으로 흡수와 재형성 과정을 반복한다. 그러나 아프리카산 발톱개구리 치아의 백악질에 관한 형태학적 특성은 잘 알려져 있지 않다. 실험동물은 변태 후 3개월 된 어린 개구리와 3년 이상 된 성숙한 개구리를 사용하였다. 각 실험동물의 위턱을 채취하여 4% 파라포름알데하이드 용액으로 4℃에서 14~16시간 동안 고정하였다. 고정된 조직을 10% EDTA/1x PBS 용액으로 탈회하였고, 파라핀에 포매한 후 5 μm 연속절편을 제작하여H-E, picrosirius red (PR), Masson’s trichrome (MT) 염색, Integrin binding sialoprotein (IBSP) in situ hybridization을 실시하였다. 뿌리집(HERS)은 분절화되지 않고 이어져 치아뿌리 전체면을 덮고 있다. 기능단계 치아는 위턱뼈에 유착되어 있고, PR 염색과 MT 염색을 실시한 결과 아교섬유는 뿌리집과 치아가 맞닿는 부위와 뿌리집으로 덮여 있지 않는 치아뿌리의 유착부위에서 관찰되었으나, IBSP 는 뿌리집으로 덮여 있지 않는 치아뿌리의 유착부위에서만 발현되었다. 아프리카산 발톱개구리의 치아에서 아교섬유의 분포와 IBSP 의 발현을 결과로 치아는 기저부에서 위턱뼈와 유착되는 치아주위조직중 일부에서 세포성시멘트질을 포함하는 것으로 추측된다. 이러한 결과는 향후아프리카산 발톱개구리의 치아에서 백악질의 미세구조와 분자유전학적 연구에 활용될 수 있을 것이다.