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송윤섭 ( Youn Seob Song ) 한국항공운항학회 2008 한국항공운항학회지 Vol.16 No.4
Functional analysis of air transport mission is conducted to establish the performance requirements of the commercial transport designs. The analysis process begins by making a top-down analysis to the aircraft system level mission functions. Correctly interpreting the top-level performance requirements is the first step in designing and building an aircraft system. Each function and sub-function is allocated and examined to the aircraft level and flight operations phase to optimize the system performance and design requirements, such that these lower-level requirements can be traced back to the top-level requirements they are designed to fulfill. Special attention is given to making sure all interfaces, both internal and external, are addressed. The results are also in good resources of functional hazard assessment involved in certification processes.
SP시험법에 의한 스테인레스강 용접부의 건전성 평가에 관한 연구
송윤섭(Youn-Seob Song),권일현(Il-Hyun Kwon) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.4
The object of this paper is to evaluate the change of the mechanical properties caused by welding and other process in HN1 and HN2 steel candidated as structural materials of nuclear fusion reactor. The conventional test methods such as fracture toughness tests, Charpy impact test and tension test for measuring mechanical properties require the removal of large samples from in-service components and are also difficult to investigate not only local region such as fusion line but also heat affected zone. In this study, the small punch(SP) test was used to detect the integrity of the weldments at 77K and 4.2K As results of this study, it could be known that mechanical property of weldments obtained from each of location in weldments may markedly decreases by nitrogen contents at 4.2K. It can be concluded that each of microstructures in weldments may reveal diffrent mechanical properties according to the extracted location of the SP specimens.
유행성 이하선염성 고환염 환자의 불임에 대한 Interferon ${\alpha}$-2B의 예방 효과
구자현,임용순,이창호,김영호,송윤섭,전윤수,김민의,이남규,박영호,Ku, Ja-Hyeon,Yim, Yong-Soon,Lee, Chang-Ho,Kim, Young-Ho,Song, Yun-Seob,Jeon, Youn-Soo,Kim, Min-Eui,Lee, Nam-Kyu,Park, Young-Ho 대한생식의학회 1999 Clinical and Experimental Reproductive Medicine Vol.26 No.1
Postpubertal mumps may result in ochitis and permanent testicular atrophy may develop following infection. This present study was initiated to evaluate the preventive effect of interferon-${\alpha}2B$ on infertilty after mumps orchitis. There were 21 patients with mumps orchitis between May 1990 and June 1997. Patients were randomly distributed into 2 groups: group 1 patients (n=13) maintained therapy with interferon-${\alpha}2B$ ($3{\times}10^6$ IU per day) and group 2 were managed by conservatively. All of the patients were evaluated with testis size measurement, mumps virus titer, hormone level, and if possible semen analysis. For group 1 patients symptoms disappeared within 2 to 3 days and the volume of testis returned to normal within 11 days and testis atrophy was not observed in all patients in follow up. But asthenospermia was continued in 4 patients (unilateral 2, bilateral 2). For group 2 patients symptoms disappeared within 5 to 6 days and the volume of testis returned to normal within 10 days and testis atrophy was observed in 3 patients (unilateral 2, bilateral 1) in floow up. Asthenospermia was continued in 4 patients (unilateral 2, bilateral 2). Sperm count and morphology were recovered all the recover in group 1, 4 patients had persistent reduced sperm count and morphology in group 2, respectively. These observations suggest that systemic interferon-${\alpha}2B$ treatment is highly effective in preventing infertilty as well as testicular atrophy after mumps orchitis.
김종권(Jong-Kwon Kim),송윤섭(Youn-Seob Song) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_1
The inertial navigation system outputs are obtained by integration of measured acceleration. Therefore the precision of the system depends on initial value of integration. For reduce the errors of navigation system, it is necessary to periodical realign and recalibrate of the system using an external reference. However, external aids, such as GPS, have many limits in actual operations. Therefore, to obtain a high precision of navigational information, it is inevitable to align a navigation system initially with respect to a reference. The purpose of this paper is to present a optimal controller design procedures for the multi variable alignment system.
송윤섭,김민의,이남규,박영호,전윤수,김응구 순천향의학연구소 1997 Journal of Soonchunhyang Medical Science Vol.3 No.2
Micropenis is defined as a normally formed penis with a size greater than 2 standard deviations below the mean. Twenty three patients with micropenis were managed at Soonchunhyang University Hospital from January 1988 to December 1995 We interviewed and examined them with micropenis to investigate the cause of micropenis, concomitant diseases, the efficacy of treatment and their sexual activity in postpubertal men. The patients were divided into 2 groups: 16 prepubertal and 7 postpubertal men. 9 patients had cryptorchidism, 3 of them were bilateral and 5 patients had hypospadias. Etiology was determined by hormonal assay including HCG stimulation test ; 8 as hypogonadotrophic hypogonadism, 4 as primary testicular dysfunction and 5 as idiopathic. However etiology was undetermined in 6 patients. All patients had endocrine therapy using HCG or depot testosterone. All except 4 cases responded satisfactorily. All postpubertal patients(group 2) were below the 10th percentile. Puberty was delayed in 3 patients in the older group. All patients were heterosexual and they have had erections and orgasms. Five patients have had ejaculations, 3 of them were sexually active and they have experienced vaginal penetration, Nevertheless, their sexual partners have had complaints and the patients themselves have felt ashamed and dissatisfied. Fortunately, they were mentally healthy. None of these patients were married or had a child.
박영호,송윤섭,임용순,김영호,이남규,구자현,서병욱,김민의,전윤수 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.2
Although ureteroscopy(URS) has been used widely to remove ureteral calculi, there is an argument against the belief that anesthesia or admission is needed for URS. We evaluated the experience of URS without anesthesia in female patients. From September 1997 to July 1998, URS was performed in 31 female patients without anesthesia. EHL(Electrohydraulic Lithotripsy) was used in 21 patients with impacted or large stone over 5mm. All patients were given oral antibiotics for 3 days and follow-up KUB was taken to confirm successful removal of the stone one week after the procedure. Successful treatment was defined as complete removal of the stone or residual fragments less than 2mm. Overall success rate was 96.7%(30 cases among 31 cases). All but one patient tolerated with analgesia through the entire procedures. There were only minimal complications such as mild flank pain and hematuria. So, we recommend that non-anesthetic ureteroscopic removal of stone as the first choice for treatment of lower ureteral stones in female based on the minimal morbidity, high success rate and low cost.
구자현,서병욱,김영호,송윤섭,전윤수,김민의,이남규,박영호 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2
We intended to know whether all of the patients with asymptomatic microscopic hematuria should be urologically investigated routinely. We reviewed the medical records with asmptomatic microscopic hematuria from January 1995 to December 1997. Urological studies included intravenous urography or ultrasonography, urine cytology, cystoscopy and biopsy, urine AFB smear and culture and urine PCR for AFB. The age with patients ranged from 9 to 74 years(mean age: 39.7 years). Benign diseases were found in elderly patients and patients with high degree of hematuria, but there was no patients who had urological malignant disease. According to the results, we suggest that follow-up with urine cytology is sufficient to younger patients or low degree of hematuria with asymptomatic microscopic hematuria.
성인 음낭수종의 치료로서 Window Operation의 효용성
서병욱,박영호,이남규,전윤수,김민의,김영호,송윤섭,구자현 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.1
We intended to determine the usefulness of window operation for adult hydrocele repair. We reviewed medical records of 132 patients from January 1995 to June 1998 with primary hydrocele and evaluated complications and recurrence rates of eversion and/or excision, plication, and internal drainage technique. Recurrence rate was highest in internal drainage technique as 85.2%, and those of eversion and/or excision and plication technique were 1.3% and 4%, respectively. Complication rate was highest in eversion and/or excision technique, and lowest in internal drainage technique. Although complication rate was lowest in window operation, this operation could not be successful due to high recurrence, and we suggest that this operation should be abandoned for hydrocele repair.