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유럽 전송방식 도입에 따른 국내 ISDN 구축의 문제점 고찰
조규섭 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.2
ISDN에서의 64 kbps 완전채널 확보를 위해 북미식에 의한 국내 디지털 전송방식을 유럽식으로 전환키로 하였으나 두방식의 서로다른 압신특성 때문에 기존의 시분할 디지틀 교환기, 예를들어 TDX-1 교환기를 ISDN에 편입시키기 위한 연구과정에서 문제점이 도출되었다. TDX-1은 북미식 ${\mu}$ law 압신방식을 갖는 이미 상용화된 교환기로서 현재 ISDN 기능을 부가시키기 위한 연구가 마무리 단계에 있다. 이러한 TDX-1과 A law 압신방식을 갖는 새로운 유럽 시스팀간에 ${\mu}/A$ 변환기능이 존재함으로 인하여 ISDN B 채널의 투명성을 유지하기가 어렵게 되었다. 이 문제의 해결을 위해 유럽 전송포맷을 채택하되 ${\mu}$ law로 압신방식을 통일할 것을 제안하였다. 본 논문은 이러한 문제점과 해결방안을 제시하고 있다. To secure the 64 kbps clear channel capability in the ISDN, it was decided to convert its North American digital transmission system into the European system especially in DS1 level. But their different companding law became an issue in the process of R&D in the existing time division digital switch such as TDX-1 to incorporate it into the ISDN. TDX-1 has been installed with North American ${\mu}$ companding law and its ISDN capability is under development now. Thus, because of the ${\mu}$ law/A law conversion for the interworking of two different transmission system, it is difficult to maintain the ISDN B channel transparency between TDX-1 and new European system with A companding law. Among some solutions for it, European frame format with ${\mu}$ law companding is recommended. Those problems and solutions are presented in this paper.
인체면역결핍바이러스 감염 환자에서 발생한 이비인후과 질환의 분석
조규섭,이덕규,박영대,신성찬,이선희,노환중 대한이비인후과학회 2009 대한이비인후과학회지 두경부외과학 Vol.52 No.6
Background and Objectives:As human immunodeficiency virus (HIV) infection increases in prevalence and new medical therapies prolong the survival of HIV-infected patients, otolaryngologists will see a larger number of patients with head and neck manifestations of HIV infection. The aims of study were to evaluate the various otorhinolaryngologic diseases and to analyze the useful markers for predicting immune function in HIV-infected patients. Subjects and Method:Of 380 HIV-infected patients, 40 patients (10.5%;39 males and 1 female, age ranging from 23 to 55) were referred to otorhinolaryngologists. Spectrum of disease and correlation between various surrogate markers (HIV RNA, leukocyte count, neutrophil, lymphocyte, CD3, CD4, CD8 T cell percentage and count, CD4/CD8 ratio) and risk of infectious otorhinolaryngologic diseases were analyzed. Results: Thirty-three patients (82.5%) were infectious, 6 patients (15.0%) had non-infectious diseases and 1 patient (2.5%) malignancy. In otologic diseases, acute otitis media and chronic otitis media were frequently found in the mentioned order. In rhinologic diseases, rhinosinusitis and vestibulitis were frequently found in the mentioned order, with one primary extra nodal non-Hodgkin’s lymphoma. In laryngologic diseases, pharyngolaryngitis, oral candidiasis, stomatitis were frequently found. In the surrogate markers of immune function, CD4 percentage, CD4 count and CD4/CD8 ratio were found significantly lower in the infectious diseases than in the non-infectious disease. Conclusion:Of HIV-infected patients, 10.5% had seen an otolaryngologist, and the majority had infectious diseases. The risk of infectious diseases was strongly correlated with the CD4 percentage, count and CD4/CD8 ratio.
안와를 침범한 상악동 악성종양에서 안구 보존을 위한 내시경의 역할
조규섭,노환중 부산대학교 병원 암연구소 2008 부산대병원학술지 Vol.- No.24
Background and Objectives: The periorbita has been regarded as the crucial structure in decision of orbital exenteration in the patients with paranasal malignancies. The mass beyond the thickened periorbita on T2-weighted images was considered to be a positive finding of orbital invasion. The purpose of this study is to evaluate the oncological safety of endoscopic removal of infiltrated tumor onto the periorbita but not transgress into orbital fat. Patients and Methods: Five patients of advanced maxillary cancer, showing bony orbital wall destruction and infiltration onto the periorbita but not transgress into orbital fat, underwent partial or total maxillectomy. Preoperative Cl and MRI were performed in all cases and compared with intraoperative findings. The successful dissection between tumors and periorbita using bipolar nasal coagulation forceps and tumor forcep was performed under endoscopy. Results: The mean age was 54.4 (41-74) years. All tumors of five patients originated from maxillary sinus and extended to involve multiple different subsites according to AJCC (2002, 6^(th) ed.) Histopathology included four squamous cell carcinomas and one adenoid cystic carcinoma. Follow-up ranged from 30 to 121 months (mean 53.6 months). All cases showed no local recurrence on the periobita after endoscopic removal. One patient had local recurrence in the pterygopalatine fossa and the other had in the neck. Conclusion: Endoscopic removal of infiltrated tumor onto the periorbita using microdebrider, bipolar nasal coagulation forceps and tumor forceps can be oncologically safe technique in advanced maxillary cancer infiltrated onto the periorbita but not invaded into orbital fat.
조규섭,구형준,김대희,노환중 대한이비인후과학회 2006 대한이비인후과학회지 두경부외과학 Vol.49 No.2
Glomus tumor, a benign tumor arising from the glomus body, usually occurs in the soft tissue of the extremities, particularly in the subungal region of the fingers. As a tumor, it is relatively rare in the head and neck region and even rarer in the nasal cavity. We have experienced a glomus tumor originated in posterior portion of nasal septum. A 82-year-old male presented a left nasal cavity mass associated with intermittent nasal obstruction and epistaxis, for which endoscopic excision with bipolar electrocautery was performed. Histopathologic findings led to the diagnosis of a glomus tumor, which originated from posterior septal artery. There was no evidence of recurrence after 6 months from the operation. We report this case with a review of literature. (Korean J Otolaryngol 2006;49:221-4)
Campylobacter Like Organism검사를 이용한 구개편도 및 아데노이드 적출조직에서 Helicobacter Pylori 집락화에 대한 연구
조규섭,왕수건,이병주,이진춘,이현순,고의경 대한이비인후과학회 2003 대한이비인후과학회지 두경부외과학 Vol.46 No.10
Background and Objectives:Helicobacter pylori infection is strongly associated with chronic gastritis and ulcer disease and mucosa-asociated lymphoid tissue (MALT) and represent an extragastric reservoir for H. pylori infection. This study was designed to find out the settling frequency of H. pylori in tonsil and adenoid tissues by Compylobacter like organism (CLO) test on tonsilectomy and adenoidectomy specimens in Koreans. Materials and Method:We reviewed the records of 52 patients aged 3 to 51 who had undergone an adenoidectomy, tonsillectomy, or adenotonsillectomy procedure under local or general CLO test kit. Color changes were noted after 20 minutes and after periods of 1, 3, and 24 hours. Results:Thirty three (63.5%) of the 52 patients were shown to be H. pylori positive. H. pylori positive rate was not significantly different acording to operation methods, age and sex. H. pylori positive rate in tonsil specimens (62.7%) was significantly higher than that in adenoid specimens (17.6%)(p<0.05). Conclusion: H. pylori infection. Tonsillectomy may be associated with decreased prevalence of H. pylori colonization. Further study is needed about corelation betwen H. pylori colonization in tonsil and H. pylori associated gastric disease. (Korean J Otolaryngol 2003 ;46 :846-50)