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이민구,정경권,Lee, Min-Goo,Jung, Kyung-Kwon 한국정보통신학회 2012 한국정보통신학회논문지 Vol.16 No.2
This paper presents a parking assistant system of multi-view using vehicle data. Proposed system provides the driver with three direction of the scenes surrounding vehicle. Depending on the handle rotation, the proposed system displays views from multiple wide-angle CCD cameras on the laptop screen to reduce blind spots, support smooth parallel or garage parking, and support comfortable and safe driving. The handle angle and gear position are obtained from ABS ECU through OBD-II port. The performance of proposed system is validated by vehicle experiments.
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이민구,김경환 ( Min Goo Lee,Kyung Hwan Kim ) 대한소화기학회 1992 대한소화기학회지 Vol.24 No.6
The human pancreas possesses an extraordinary capacity to synthesize and secrete a wide range of products, mainly the digestive enzymes. Knowledge of the secretory profiles of pancreatic exocrine enzyme is important for undersanding of physiological as well as pathological processes in the pancreas. The present study was the first approach to resolve and characterize enzymes in human pancreatic juice by HPLC using hydrophobic interaction column (HIC). Pancreatic juice obtained from 14 human subjects was analyzed. Decreasing four-stage ammonium sulfate concentration in the gradient of mobile phase, it was possible to obtain an ideal chromatogram of human pancreatic juice protein, and total 18 peaks were detected in the chromatogram. Analysis of enzymatic activity of each peak revealed 5 major enzymes, those were, trypsinogen, chymotrypsinogen, procarboxypeptidase A, procarboxypeptidase B, and amylase. The molecular weights of each enzyme peak was identical to those reported previously by 2-dimensional electrophoresis. These results suggest that the HPLC analysis of human pancreatic juice protein using HIC allows rapid and reproducible separation of the major enzyme proteins, and it may be useful in the diagnosis of human pancreatic diseases.
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이민구,원중연,김형종 대한이비인후과학회 2014 대한이비인후과학회지 두경부외과학 Vol.57 No.7
Background and Objectives There is no consensus on the prognostic factors regarding pos-toperative recurrence after myringoplasty. In this study, we investigated the preoperative clinical findings and postoperative results after primary myringoplasty and compared them with those of revision myringoplasty. Subjects and Method Computerized database of 861 clinical records of last 20 years were analyzed retrospectively for the subjects who underwent myringoplasty at the Department of Otolaryngology, University of Korea. All the surgeries were done under general or local anesthesia by senior surgeons. Primary and revision cases of myringoplasty or type 1 tympanoplasty followed up at least for longer than 3 months were only included in the study. Those other cases of tympanoplasty types, concomitant ossiculoplasty and/or mastoidectomy, or those with the presence of cholesteatoma and those that required repair during exploratory tympanotomy were excluded. Results 535 primary and 101 revision cases have met our inclusion criteria. Overall, in this study, the failure rates of primary and revision myringoplasty were 11.02% and 5.94%, respectively. Significantly different among the prognostic factors were such as sex, age, anesthesia, surgical approach, the presence of otorreha, size of eardrum perforation, external auditory canal narrowing, valsalva test, degree of pneumatization, graft materials, tympanoplasty type, previous mastoidectomy, the presence of bilateral otitis media influencing on myringoplasty revision, and the presence of otorrhea and sclerotic type of mastoid pneumatization. Conclusion Among various prognostic factors of myringoplasty, poor prognostic factors were preoperative otorrhea and poor pneumatization. Korean J Otorhinolaryngol-Head Neck Surg 2014;57(7):454-9
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중년 및 노인에서의 만성 폐쇄성 폐질환과 비용종 발생 감소의 상관성
이민구,김시환,양정환,이주한,최효근 대한이비인후과학회 2016 대한이비인후과학회지 두경부외과학 Vol.59 No.4
Background and Objectives Chronic obstructive pulmonary disease (COPD) is known to induce chronic rhinosinusitis (CRS). Nasal polyp, which is frequently found in patients with CRS, seems to have close relationship with COPD, but little is known about its relationship with COPD. In this study, we investigated the relationship between COPD and nasal polyp in middle aged and elderly CRS patients. Subjects and Method We analyzed the clinical data of 174 patients (age of over 50 years) with CRS. Patients were divided as COPD [forced expiratory volume (FEV1)/forced vital capacity (FVC)<70%, n=30] and non-COPD group (FEV1/FVC≥70%, n=144) according to the pulmonary function test results. Binary logistic regression analysis was used to describe the relationships between clinically relevant factors related to nasal polyp. Results On logistic regression analysis, no significant relationship was found between age [adjusted odds ratio (AOR): 1.058, 95% confidence interval for the difference (CI)=0.995-1.126, p=0.073], sex AOR: 0.897, 95% CI=0.366-2.415, p=0.897), smoking (AOR: 0.434, 95% CI=0.154-1.219, p=0.113) and obesity (underweight AOR: 3.833, 95% CI=0.781-18.808, p= 0.098, overweight AOR: 5.169, 95% CI=0.996-26.814, p=0.051, obese AOR: 2.911, 95% CI= 0.335-25.329, p=0.333) with polyp. However, there was a negative correlation between COPD history and nasal polyp with statistical significance (AOR: 0.288, 95% CI=0.102-0.809, p=0.018). Conclusion Our findings suggest that patients with COPD are less likely to have nasal polyp than patients without COPD. Korean J Otorhinolaryngol-Head Neck Surg 2016;59(4):287-92
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전도선 Poly(vinyl Chloride)/Poly(aniline) 복합체의 제조 및 전기적 성질
이민구,한명희,김병일,박연홈 한국섬유공학회 1992 한국섬유공학회지 Vol.29 No.12
Electrically conducting poly(vinyl chloride)Ipoly(aniline) (PVC/PANi) composite films were prepared by exposing PVC films containing ferric chloride to aniline vapor under various polymerization conditions. Their electrical and physical properties and morphologies were stu-died. Hydrochloric acid was used for the preparation of protonated PVC/PANi composite films. The electrical conductivity of PVC/PANi composite films lie in the range of 1O- 7~1O- $^2$ S/cm, depending on the preparation conditions such as the concentration of ferric chloride and hydro-chloric acid, and polymerization temperature. The formation of PANi in PVC matrix was confirmed by FT-IR spectroscopy and scanning electron microscopy.
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