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선미선저(船尾船底)에 미치는 추진기(推進器) 유기압력(誘起壓力) -선체표면(船體表面)에 붙인 압력변환기(壓力變換器)로 계측(計測)되는 압력(壓力)으로부터의 한 분리방법(分離方法)-
조규종,Kyu-Jong,Cho 대한조선학회 1970 大韓造船學會誌 Vol.7 No.1
The propeller induced pressure fluctuation around a ship's stern is one of the interesting problems from viewpoints of the noise and vibration. Most of the experimental works on the subject employ pressure transducer attached on hull surface near the propeller. In the technique, the measured pressure includes the hydrodynamic pressure transducer attached, if they exit. Hence, the separation of the additional pressure due to vibration from the measured pressure is essential for the determination of true values of the propeller induced pressure. In this paper, to contribute to the separation method, the author investigated the additional hydrodynamic pressure as below, based on the numerical calculation. (1) Hydrodynamic pressure on the body surface of two dimensional cylinders of some mathematical sections such as ellipse, rectangle, Lewis form of hypotrocoidal charactor and curvilinear-element section with chines oscillating vertically at high frequency in a free surface. (2) Hydrodynamic pressure on the surface of the shell plate in local vibration in an ideal fluid.
인하대학교(仁河大學校) 선형시험수조(船型試驗水槽)에 관(關)하여
조규종,인철환,홍성완,박노식,K.J.,Cho,C.H.,Ihn,S.W.,Hong,R.S.,Park 대한조선학회 1973 大韓造船學會誌 Vol.10 No.2
Since 1967 the Towing Tank of Inha University has been planed constracted and was completed 1971. The size of the tank is 79m length, 5m width 3m depth. At one end of the tank, 18kw wave maker is installed which can produce regular and irregular waves, max. 6m length 40cm height. The towing carriage is driven by four 2.2kw motor and reuglated by electronic speed regulator, and it's max. towing speed is 2.5m/sec, resistance dynamometer and some other instruments including clamp, towing guide etc. are designed and made by us. Here under, the authors wish to give some details of facilities and calibrated performance of the towing carriage, wave maker and resistance measuring system.
수도권지역 일개 전문 응급의료센터로 내원한 외상환자의 연령군별 특성
조규종 ( Gyu Chong Cho ),문이상 ( Lee Sang Mun ),강희동 ( Hui Dong Kang ),손유동 ( You Dong Sohn ),오범진 ( Bum Jin Oh ),김원 ( Won Kim ),임경수 ( Kyoung Soo Lim ) 대한외상학회 2005 大韓外傷學會誌 Vol.18 No.2
Background: Although trauma has been the major cause of death in korea, there are few reports describing the epidemiologic characteristics of trauma victims according to age-group. Thus, this study aimed to describe the epidemiologic characteristics of trauma victims visiting an urban emergency medical center in Korea. Method: This study was conducted with all trauma victims who visited the emergency departments of Asan Medical Center from April 11, 2005 to May 10, 2005. After the subjects were divided into three groups such as child (≤ 14 years old), adult(15-64 years old) and elderly(≥ 65 years old), the prehospital courses, injury mechanisms, injury severities and clinical results were compared. Result: Among total 5,927 patients who visited the emergency medical center, 896(15.1%) patients were trauma victims. Although child under the age of 15 comprised 28.7% of the total trauma victims, less severe injuries(injury severity score < 9) accounted for 97.7% of the cases. The hospitalization rate for injury among child was 21.5%. however, although elderly aged 65 comprised only 5.9% of the total trauma victims, more severe injuries(injury severity score ≥ 9) accounted for 30.2% of the cases. The hospitalization rate for injury among elderly was 56.4%. Conclusion: Patterns of injury and clinical results by age-group were considerably different. less severe and non-hospitalized injuries were more common in child than other age-groups. while severe and hospitalized injuries were common in elderly.
조규종(Kyu Chong Cho),최도영(Do Young choi),전의식(Ui Sik Jeon),오수희(Soo Hee Oh) 대한피부과학회 1989 대한피부과학회지 Vol.27 No.1
We report two cases of hyperkeratosis of the nipple and areola which occurred in 22-year-old woman and 13-year-old girl. The former was suffered from mild pruritic, verrucous thickening and brownish discoloration of both nipples and areolae for 5 years. The latter had asymptomatic, verrucous thickening and dark brownish hyper- pigmentation of the right nipple and areola for 3 years. Both showed mild to marked hyperkeratosis and papillomatosis with increased pigmentation in the basal cell layer histopathologically. In both cases, the lesions were not responsive to the topical medications including steroids and keratolytic agents. Therefore we recommended surgical excision because the patients are greatly disturbed by the appearance of the lesions.
조규종(Kyu Chong Cho),최도영(Do Young choi),전의식(Ui Sik Jeon) 대한피부과학회 1988 대한피부과학회지 Vol.26 No.1
We report s case of angiokeratoma of the vulva occuring in a 36-year-old woman. Numerous grayish dark purple papulovesicular lesions, ranging from 0.2 to 2.0mm in size, were observed on the right labium majus. All lesions were excised under local snesthesia after the diagnosis of angio keratoma was made histopathologically. No new lesions appeared during the follow-up period of one year.
E-Beam Probing을 이용한 Embedded SRAM 검증방법
조규종(Kyu-Jong Cho),이윤우(Yun-woo Lee),이규택(Kyu-Taek Lee),민형복(Hyung-Bok Min) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11
Recently a embedded SRAM is widely used in various applications because of its compatibility with logic fabrication process and its many merits such as fast access time, wide bandwidth, and so on. Therefore development of robust embedded SRAM and its functional verification are very important. But because of a limitation of input or output pads, it is hard to observe internal nodes’ characteristics of a embedded SRAM. In this paper, we proposed that a E-Beam probing technique is very useful to monitor internal nodes of embedded SI1AM, and E-Beam probing measurement is easily carried out with small pads that are previously in layout design process arranged on top metal layer of chip.