Phlegmon 성 위염 1 예

박경태,김을수,최영길,정정명,이부경,설상영,김기현 대한내과학회 1988 대한내과학회지 Vol.34 No.3

We had experienced a 34-year-old female patient with phlegmonous gastritis which was confirmed by radiologic studies and operation. Enterobacter aerogenes, E-Coli and Morganella morganii were cultured from the specimen of necrotic stomach tissue which was obtained by operation. The operation findings were revealed necrosis of total wall on the lower esophagus, stomach, duodenum and proximal portion of jejunum. The patient was rapidly deteriorated with downhill course and expired on 3rd hospital day.

다문화, 화려한 수사와 유행을 넘어서

박경태 비판사회학회 2012 경제와 사회 Vol.- No.94

이동 통신 망에서 측정하여 계산된 경로 손실의 급격한 변동 위치 추출 방법

박경태,배성혁,Park, Kyung-Tae,Bae, Sung-Hyuk 한국융합신호처리학회 2014 융합신호처리학회 논문지 (JISPS) Vol.15 No.1

이동 통신망의 기지국과 이동국 사이의 거리 차로 인하여 발생하는 경로 손실 데이터를 분석하였다. 본 논문에서는, 측정된 수신 신호세기(RSSI)로부터 송수신기 거리 차이에 따른 경로 손실을 계산하여 이를 그래프로 표시하고, 평균한 데이터를 이용하여 기존의 경로 손실 모델들(자유공간 모델, 지면반사파 모델, 하타 모델, ${\ldots}$)과 그래프를 동시에 그려서 비교하였다. 2 Km, 1 Km, 0.5 Km 간격으로 평균한 경로 손실 데이터에 대한 표준 편차를 구해 보니, 각각 2.29 dB, 3.39 dB, 4.75 dB가 되었다. 본 논문에서는 거리별로 계산된 경로 손실 평균값들의 미분 값을 구하여, 앞에서 구한 경로 손실 표준 편차의 1 또는 2배수를 초과하여 변동하는 위치를 찾아내는 방법을 제안 하였다. 이렇게 제안한 방법을 적용하여 분석한 결과, 송수신기 사이에서 손실이 급격하게 발생하는 지점이, 2 Km 간격으로 경로 손실을 평균한 경우에는 5 지점, 1 Km 간격으로 평균한 경우에는 7 지점, 0.5 Km 간격으로 평균한 경우에는 19 지점이 됨을 알 수 있었고, 구체적인 위치를 파악하는 성과를 얻었다. The path loss data was re-calculated according to the distance between the base station and a mobile station in the mobile telecommunications network. In this paper, the averaged path loss data was plotted with the conventional path loss models(free space, plane earth, Hata model ${\ldots}$). The standard deviations for the 2 Km, 1 Km, 0.5 Km-interval averaged path loss were 2.29 dB, 3.39 dB, 4.75 dB, respectively. Additionally, the derivative values for the 2 Km, 1 Km, 0.5 Km-interval averaged path loss were evaluated to find the positions with more than 1 times or 2times of the standard deviation. The situations with the sharply fluctuated path loss were calculated to 5 positions in the 2 Km interval, to 7 positions in the 1 Km interval, to 19 positions in the 0.5 Km interval, respectively. And, the exact distances between the base station and a mobile station were found with the sharply fluctuated path loss.

항진균제 국소도포가 조갑 성장 속도에 미치는 영향

박경태,김정수,유희준 대한의진균학회 2006 대한의진균학회지 Vol.11 No.2

Background: Numerous environmental, physiological, and pathological factors, and some medications are known to influence the speed of nail growth. Objective: Our purpose was to know the effect of topical antifungal drug, amorolfine, on the growth rate of nails. Methods: First study was performed to patients with distal subungual onychomycosis affecting at least one side of great toe nail (64 cases). The growth rate of affected toe nails was memasured according to the treatment groups, oral itraconazole alone (21 cases), combination of oral itraconazole and amorolfine (23 cases), and amorolfine alone (20 cases). Also, the growth rate of toe nails in the controls who have tinea pedis without onychomycosis (22 cases) was measured. Another study was performed to healthy volunteers without onychomycosis, tinea pedis and any other dermatologic and systemic disease (21 cases). The growth rate of normal toe nails before and during application of amorolfine was measured. Results: There was no statistically significant difference in the growth rate of affected toe nails between monotherapy group with oral itraconazole alone and combination therapy group with oral itraconazole and amorolfine in patients with onychomycosis (p>0.05). There was no statistically significant difference when comparing the growth rate of affected toe nails of patients with onychomycosis treated with amorolfine alone with that of normal toe nails of the controls (p>0.05). There was no statistically significant difference in the growth rate of normal toe nails between before and during application of amorolfine in healthy volunteers (p>0.05). Conclusion: Topical antifungal medication might not influence the growth rate of nails. 진균에 감염된 조갑은 활동성인 감염기간 동안에는 조갑의 성장 속도가 감소하며, 조갑 침범 정도가 심할 때 특히 그러하다1~3. 조갑의 성장 속도가 감소하는 기전에 대해서는 명확히 알려져 있지는 않으나 조갑 기질과 조갑상의 변화가 성장 속도의 감소에 기여하는 것으로 생각되고 있다4. 즉 조갑의 성장 속도는 활동성인 조갑 기질 세포의 증식 능력에 의해 일차적으로 결정되고 조갑상이 부분적으로 영향을 끼치며5~8, 수많은 환경적, 생리적, 그리고 병적인 요인들이 조갑의 성장 속도에 영향을 주는 것으로 알려져 있다9~12. 최근 terbinafine, fluconazole, itraconazole의 경구복용 후 조갑 성장 속도의 증가가 관찰된 연구 결과들이 보고되고 있으며13~18, ciclocipirox, amorolfine 등의 항진균제를 조갑에 도포할 경우 조갑의 하면까지 침투가 일어난다는 연구 결과들도 보고되고 있다19-22. 이는 항진균제 국소도포도 조갑의 성장 속도에 영향을 줄 가능성에 대해 생각해 보게 하며, 또한 nail lacquer의 국소도포로 인해 형성된 조갑 표면의 비수용성 막 자체도 조갑의 성장 속도에 영향을 줄 수 있을 것으로 생각해 볼 수 있다. 이 연구에서는 엄지발톱을 침범한 조갑진균증이 있고 다른 전신 질환이 없으며 itraconazole 경구투여 단독 요법, 5% amorolfine nail lacquer 국소도포의 단독 요법, 또는 itraconazole과 5% amorolfine nail lacquer의 병합 요법을 시행한 환자와 정상 발톱을 가진 족부 백선 환자 그리고 조갑진균증과 족부 백선 없이 정상 발톱을 가지며 다른 피부 질환과 만성 질환이 없는 건강한 성인 자원자를 대상으로 항진균제의 국소도포가 조갑의 성장 속도에 미치는 영향에 대해 알아보고자 하였다.

Inclusions Nucleating Intragranular Polygonal Ferrite and Acicular Ferrite in Low Alloyed Carbon Manganese Steel Welds

박경태,Si Woo Hwang,Jung Hoon Ji,이창희 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.2

The inclusion-assisted formation of two types of intragranular ferrite in low alloyed C-Mn steel welds, intragranular polygonal ferrite (IPF) and acicular ferrite (IAF), was investigated in relation to the inclusion characteristics (mainly size and chemistry) and the welding heat input. For this analysis, inclusions engulfed by one ferrite grain and those shared by two ferrite grains were considered as the IPF nucleants, and the rest of them (in contact with more than three ferrite grains) were considered as the IAF nucleants. All inclusions were multi-component oxides having Ti oxides as the nucleoid. The inclusion size exhibited a log-normal distribution and the average size increased as the heat input increased. Inclusions larger than ~0.4 μm were found to be effective on IAF nucleation, and the effectiveness increased as the inclusion size increased. Accordingly,the overall IAF nucleant fraction increased as the heat input increased due to the corresponding inclusion size increase. However, the probability of the IAF nucleant in the same inclusion size range was insensitive to the heat input. There was no difference in the elemental distribution between the IAF and IPF nucleants except for Si. The Si distribution was uniform in the IPF nucleants while its content was relatively high at the inclusion periphery in the case of the IAF nucleants regardless of the heat input and the inclusion size.

[B-6] 시나리오에 따른 화석 연료 발전소 발전 단가 분석

박경태,윤인섭 한국가스학회 2010 한국가스학회 학술대회논문집 Vol.2010 No.10

퇴행성 슬관절염 환자의 초음파 소견과 통증 및 기능적 척도와의 연관성

박경태,김현정,박혜경,최남홍,강윤주 대한재활의학회 2008 Annals of Rehabilitation Medicine Vol.32 No.6

Objective: To evaluate the usefulness of ultrasonographic (US) examination in patients with knee osteoarthritis (OA) and determine US findings associated with pain and functional status. Method: 45 patients with primary knee OA classified by the American College of Rheumatology (ACR) criteria were recruited. The severity of pain and functional status were measured by Lequesne index and Western Ontario and McMaster Universities Osteoarthritis Scores (WOMAC). All patients underwent US examination of their knees and plain radiography for Kellgren and Lawrence (KL) grade. Results: Even in mild OA cases (KL G1, 2), patients had evidence of distended suprapatellar pouch (effusion) (32%), synovial thickening (12%), cartilage degeneration (32%) and medial capsular distension (72%). The severity of pain and functional status were found to be correlated with following US findings: amount of suprapatellar effusion (γ=0.514, p<0.01), degree of synovial thickness (γ=0.520, p<0.01), cartilage degeneration grade (γ=0.594, p<0.01), length of medial capsular distension (γ=0.426, p<0.01). However, the length of medial and lateral osteophytes, size of Baker's cyst, and clinical parameter such as age, disease duration and BMI score were not correlated with the severity of pain and functional status in OA patients. Following multiple regression analysis, the amount of effusion, synovial thickness and length of medial capsular distension were correlated with Lequesne and WOMAC functional status score (γ2=0.635, p<0.05). Conclusion: Ultrasonographic assessment was useful for diagnosing knee OA. The severity of pain and function were highly associated with the amount of suprapatellar effusion, degree of synovial thickness, the length of medial capsular distension and grade of cartilage degeneration.

Wegener 육아종증의 진단과 치료에 대한 임상적 경험

박경태,공일규,한두희,김대우,김시환,이재서,이철희,민양기,김동영 대한이비인후과학회 2008 대한이비인후과학회지 두경부외과학 Vol.51 No.12

Because most patients with Wegener’s granulomatosis (WG) visit otolaryngologists complaining of head and neck symptoms, otolaryngologists may play an important role in early diagnosis. In this study, we investigated clinical features, laboratory findings and treatment outcomes of 33 patients with WG, and propose a new algorithm for the diagnosis of WG. Subjects and Method:Thirty-three patients with WG who visited the clinic between January 1980 and December 2007 were included. The medical records of 13 male and 20 female patients were retrospectively reviewed. The mean follow-up duration was 68 months. Results:Most WG patients had ENT symptoms such as nasal obstruction, rhinorrhea, otorrhea, hearing loss, dyspnea and hoarseness. The mean duration from ENT examination to diagnosis was 6.7 months (3 days- 102 months) and tissue biopsy was performed on an average of 2.1 times to confirm the diagnosis. While 16 patients could be diagnosed by the first biopsy, the others were required to repeat the biopsy. ANCA was positive in 17 patients (50%). Twentysix patients (78.7%) had multiple organ involvements such as lung, kidney, joint and skin. Twenty-eight patients received a combination of prednisolone and cyclophosphamide with the remission rate of 87%. Conclusion:Based on this study, we propose a better algorithm for the diagnosis of WG to avoid unnecessary delay in the diagnosis and treatment of WG. (Korean J Otorhinolaryngol-Head Neck Surg 2008;51:1109-18)

외이도 악성 종양의 치료 결과 및 예후 인자 분석

박경태,송재진,장정훈,오승하,김종선,장선오,이준호 대한이비인후과학회 2010 대한이비인후과학회지 두경부외과학 Vol.53 No.5

Background and ObjectivesZZThe purpose of this study was to analyze the survival rate treatment modalities and certain prognostic factors in patients with external auditory canal (EAC)cancer using the University of Pittsburgh TNM Staging System. Subjects and MethodZZMedical records and radiological findings of 33 patients treated for EAC cancer between January 1995 and January 2009 were reviewed retrospectively. The median follow-up period was 65 months (range, 12-182 months). ResultsZZThe most common histological type was squamous cell carcinoma (19 patients;57.6%), followed by adenoid cystic carcinoma (9 patients; 27.3%), basal cell carcinoma (1 patient),adenocarcinoma (1 patient), rhabdomyosarcoma (1 patient), undifferentiated carcinoma (1 patient) and malignant small round cell tumor (1 patient). Seven of 33 patients died of EAC cancer and the overall survival rate was 70.6%. There was a significant difference in the survival rate with respect to TNM stages (p=.031). The 10 yr-survival rate of patients with stage I disease was 100.0%, whereas those of stages II, III and IV were 50.0, 80.0 and 58.3%, respectively. Five of 7 patients with recurrence had a history of initial positive resection margin. ConclusionZZEarly detection and proper surgical treatment with sufficient resection margin are essential for disease-specific survival and prevention of recurrence in patients with EAC cancer. Korean J Otorhinolaryngol-Head Neck Surg 2010;53:275-83

분말야금법으로 제조된 FeSi₂ 열전특성 화합물의 열처리 시간에 따른 미세조직과 상변화

박경태,신진교,홍순직,천병선,Park, Kyoung-Tae,Shin, Jin-Gyo,Hong, Soon-Jik,Chun, Byong-Sun 한국분말야금학회 2010 한국분말재료학회지 (KPMI) Vol.17 No.6

In this study, $FeSi_2$ as high temperature performance capable thermoelectric materials was manufactured by powder metallurgy.The as-casted Fe-Si alloy was annealed for homogenization below $1200^{\circ}C$ for 3 h. Due to its high brittleness, the cast alloy transformed to fine powders by ball-milling, followed by subsequent compaction (hydraulic pressure; 2 GPa) and sintering ($1200^{\circ}C$, 12 h). In order to precipitate ${\beta}-FeSi_2$, heat treatment was performed at $850^{\circ}C$ with varying dwell time (7, 15 and 55 h). As a result of this experiment thermoelectric phase ${\beta}-FeSi_2$ was quickly transformed by powder metallurgical process. There was not much change in powder factor between 7h and 55h specimens.