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저층 트롤에서 3차원 위치를 이용한 만곡형 전개판의 영각 추정
고광수 ( Gwang Su Go ),조봉곤 ( Bong Kon Chol ),배재현 ( Jae Hyun Bae ),조성옥 ( Seong Ok Cho ),원성재 ( Sung Jae Won ),윤홍근 ( Hong Keun Yoon ),박해훈 ( Hae Hoon Park ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.1
The angle of attack of a cambered otter board in a bottom trawl was estimated using a three-dimensional semi-analytic treatment of a towing cable (warp) system that was applied to the field experiments of a bottom trawl obtained by the Scanmar system. The equilibrium condition of the horizontal component and vertical component of forces was used to the three forces acting on the otter board in the horizontal plane. Those forces were the force on the warp at the bracket, hydrodynamic lift and drag forces on the otter board and the force on the hand rope attached just behind the otter board. Also the equilibrium of moment about the front edge of the otter board was used to find out the angle of attack of the cambered otter board. When the warp length was 120m and 180m long and the towing speed was between 1.23 and 1.90 m/s, the estimated angle of attack of the cambered otter board was ranged between 26.1° and 29.6°, respectively, though the maximum lift force was at the angle of attack 22.6°. The angle of attack of the otter board was tended to increase weakly with the longer length of warp (180 m) at the same towing speed in the experiment.
초음파(A-scan)에 의한 두개강내 질환의 진단에 관한 연구
조성옥,심보성 최신의학사 1971 最新醫學 Vol.14 No.4
The use of ultrasound in medical diagnosis goes back to the brothers Dussik, who attempted to outline the cerebral structures with aid of the ultrasonic transmission technique as early as 1942. Unfortunately this method, called "hyperphonographv", did not lead to the hoped-for success. In 1950 French, et al. reported that they were able to diagnose the brain tumor by using ultrasound reflection method on the exposed brain. On the next year they used direct cortical application of this method for localization of brain tumors during operation. Leksell in 1955 introduced the echo pulse method on the intact skull for the detection of space-occupying intracranial lesions. Echoencephalography is the term coined by Leksell for a new technique by which the position of the midline structures of the brain can be determined by passing a beam of pulsed ultrasound into the head and recording the returning echoes. This technique, used increasingly in Europe and Japan since 1956 and a little later in United States, has been little used in Korea. The purpose of this report is to present our experiences with A-scan echoencephalography in 80 normal persons and 395 patients with intracranial lesions in the last 26 months. An Aloka SSD-9B ultrasonic analyzer (A-scope) was used. The machine is basically an ultrasound generator and receiver, displaying the echoes on an oscilloscope with camera attachment for permanent recording. The 1 and 2.25 Mc. /sec. crystals are made of barium titanate, whereas the 5 and 10 Mc. /sec. crystals are made of piezoelectric quartz. For investigations through the intact skull usually used 2. 25 Mc. /sec. transducer, but 1 Mc. /sec. transdurcer was used when the skull is thick or when the passage of sound in otherwise attenuated. The 5 and 10 Mc. /sec. transducers were used for dural or cortical echoencephalgraphy. 1. All normal persons showed normal pulsating midline echo, however mild shift (2-3 mm.) of midline etho was observed in about 10 per cent of theni 2. In 231 acute craniocerebral injuries, midline echo shift (2 mm.) was found in 19 of 141 cerebral contusion cases, 23 of 26 unilateral epidural hematomas, 40 of 54 unilateral subdural hematomas, 1 of 5 bilateral subdural hematomas and in all of 2 unilateral epi- and subdural hematomas and 3 traumatic intra?cerebral hematomas. 3. In 62 acute cerebrovascular disease cases, midline echo shift (>2 mm.) was found in 3 of 28 cerebral infarction cases, 9 of 12 intracerebral hematoma cases and 4 of 22 spontaneous subarachnoid hemorrhage cases. In 10 of 12 intracerebral hematoma cases, however, evident hematoma echoes were observed. 4. In surgically verified 42 intracranial tumors, midline echo shift was found in only 17 cases (52 per cent) and in 15 suspected intracranial tumors only 6 cases (40 per cent). However in 17 cases of cerebral hemispheric tumors, midline echo shift was found in 14 cases (82 per cent). In 5 cases of craniopharyngioma all showed cystic tumor echoes and corresponding midline echo shift in 3 cases, in 3 cases of pineal tumor also showed tumor echoes in all cases with midline echo shift in 2 cases, and all cases of 2 thalamic tumors and 1 cerebral paragonimiasis showed midline echo shift. So the diagnostic value of A-scan in intracranial tumors was 90 per cent when excluded posterior fossa tumors and pituitary adenomas. 5. Midline echo shift was observed in 4 of 32 epilepsy cases, 5 of 7 infantile cerebral atrophy cases and all of 3 brain abscesses. In three of typical hydrocephalic patients no midline echo shift was found but double midline echoes were observed. In conclusion it can be stated that the A-scan echoencephalography is a relibale, harmless and rapid method for the exclusion or confirmation of various space-occupying intracranial lesions and hydrocephalus, when the extent of midline echo shift, special reflexions from hematoma, tumor and ventricles, etc. and variation in sound attenuation are taken into consideration.
뇌졸중 후 치매환자에서 도네피질(아리셉트^(?))이 인지기능 및 일상생활 수행능력, 삶의 질에 미치는 효과
이상열,장혁,송재은,조성옥,류정미,이미경,조진호,신용일 圓光大學校 醫科學硏究所 2008 圓光醫科學 Vol.23 No.1
Background: This study evaluated the efficacy of administering Donepezil(Aricept^(?)) for improving cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia. Methods: Patients(n=99; mean age, 69.89 years; 48.5% men) with post-stroke dementia, according to criteria of the DSM-IV and MRI, were treated with donepezil 5mg/day or 10mg/day during 24 weeks. They were examined using Mini-mental Status Examination(MMSE), Chinical Dementia Rating(CDR), Barthel Activities of daily living(B-ADL), Instrumental Activities of daily living(I-ADL), Short Form 36 Health Survey-Korean(SF-36-K), and Geriatric Depression Scale(GDS) at before treatment and 24 weeks after treatment. Results: The 97 patients completed the trial. At 24 weeks, they showed significant improvement in MMSE(p<0.001), CDR(p<0.001), B-ADL(p=0.002), I-ADL(p<0.001), and SF-36-K(p=0.003) except GDS(p=0.288). Donepezil was well tolerated. There was no withdrawal due to adverse events. Conclusion: This results demonstrate that donepezil was beneficial in improving the cognitive function, activities of daily living, and quality of life in patients with post-stroke dementia and was well toleraetd.