저크비용함수를 이용한 골프 숙련자와 초보자간의 퍼팅 동작 분석

임영태,최진승,한영민,김형식,이정한,전재훈,탁계래 한국운동역학회 2006 한국운동역학회지 Vol.16 No.1

Wetting에 의한 필댐 상류측 shell의 거동특성

임희대,백장열,이영섭 충남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.14 No.2

The primary objective of this paper is to see the behavior characteristics of rockfill dam due to wetting. There are many factors which affect the dam failure. One of them is the influence of reservoir filling. Differential movements in dam and foundation develop during reservoir filling, they induced cracking and consequent erosion, and sometimes caused dam failure. One of the major factors contributing to the development of differential movements during reservoir filling is the compression due to wetting which occurs in a wide variety of different types of soils including rockfill. To perform the numerical analysis of dam behavior adequately, the large-scaled triaxial test is needed to consider the effect of wetting on dry and wet rockfill material. But, As the large-scaled triaxial test is high capital cost and not available apparatus for a number of other experiment, it is not applied many case in the country. In this paper, the data of Oroville dam which performed the large-scaled triaxial test is referenced to find out stress-strain curve and hyperbolic parameters on wetting for modeled dam which is not performed the large-scaled triaxial test. So, effect of wetting on modeled dam can be considered for numerical analysis of dam behavior. As a result of numerical analysis, they estimate that horizontal and vertical displacement are increased with the rate of increasing wetting, and shear stress too. Because compression and shear strength is decreased with proceeding wetting. And results of analysis show that load transfer is not affect significantly by the wetting.

후두부 발작성 간질파와 동반된 양성 소아기 간질의 임상적 연구

유영수,이상도,김지언,임정근,박영춘 대한신경과학회 1996 대한신경과학회지 Vol.14 No.4

강유전체 박막 커패시터 하부전극에 관한 연구

임동건,정세민,최유신,김도영,이준신 성균관대학교 1997 학술회의지원논문목록집 Vol.1997 No.-

We have investigated Pt and RuO₂as a bottom electrode for a device application of PZT thin film. The bottom electrodes were prepared by using an RF magnetron sputtering method. We studied some of the property influencing factors such as substrate temperature, gas flow ratem and RF power. An oxygen partial pressure from 0 to 50% was investigated. The results show that only Ru metal was grown without supplying any ‬O₂gas. Both Ru and RuO₂phases were formed for ‬O₂partial pressure between 10-40%. A pure RuO₂phasewas obtained with ‬O₂partial pressure of 50%. A substrate temperature from room temperature to 400°C was investigated with XRD for the film crystallinity examination. The substrate temperature influenced the surface morphology and the resistivity of Pt and RuO₂ as well as the film crystal structure. From the various considerations, we recommend the substrate temperature of 300°C for the bottom electrode growth. Because PZT film growth on top of bottom electrode requires a temperature process higher than 500°C, bottom electrode properties were investigated as a functiona of post anneal temperature. As post anneal temperature was increasedm the resistibity of Pt and RuO₂was decreased. However, almost no change was observed in resistibity for an anneal temperature higher than 700°C . From the studies on resistivity and surface morphology, we recommend a post anneal temperature less than 600°C.

댐의 龜裂發生 構造와 應力轉移에 關한 硏究

이영섭,임희대 忠南大學校 産業技術硏究所 1999 산업기술연구논문집 Vol.14 No.1

Generally the cracking in dams is one of the major problems which dam engineers encounter. Concenteated leaks which can result in internal erosion and piping phenomenon have frequently developed through embandment cracks located directly adjacent to rock abutments at the points of abrupt change in slope, and particularly adjacent to horizontal steps used for haul roads,grouting platforms, and so on . Many studies,such as observation, 1ab test and numerical snalysis have been conducted to reveal the mechanism of internal and expernal cracking. It is considered that unfavourable deformation and stress state are the direct cause of the cracking. Longitudinal and trasverse cracks on the crest is occurred by differential settlements in the core zone and differential deformation between adjacent zones and closely concerned with the fluctuation of water level. While during of after dam construction, the core zone with low stiffness can be in the state of low stress due to load transfer resulted from relative deformation against shell zones or adutments. In order to study cracking and leakage, Juam main dam is adopted to analyze deformation and stress condition. The results of numerical analysis and installation indicate that the tension zone of the right abutments is comparatively manifest and the stress-transfer of the upper part the core is more remarkable than lower part.

다짐함수비 變化에 따른 필댐의 擧動分析

임희대,김태곤,이영섭,고근식 충남대학교 산업기술연구소 1999 산업기술연구논문집 Vol.14 No.2

Compaction water content is a key variable which controls fundamental properties of compacted clay (permeability, deformation and strength). There are three conditions in compaction water content (i.e. dry of optimum, optimum and wet of optimum). Actually, soil mass by compaction is unsaturated condition before seepage therefore, soil suction is the key which is able to explain properties of compacted clay. This paper used results from compacted Pittsburg sandy clay tested under UU test condition from Duncan and Seed in order to determine hyperbolic parameters and simulated behavior of Soyanggang dam as a example. As the results of analysis, dry of optimum presents higher strength and smaller displacement. Wet of optimum is sensitive to water content. Both dry and wet of optimum, any hydraulic fracturing potential does not appear. But dry of optimum is close to hydraulic fracturing.

작용시간 연장을 위해 고안된 이식형 혼합국소마취제의 효과

백운이,최병영,전영훈,임정옥 경북대학교 의학연구소 2000 경북대학교병원의학연구소논문집 Vol.4 No.1

Prolonged Regional Nerve Blockade from Implantable pellets Containing Mixture of Local Anesthetics and Biodegradable Polymer Background: The Currently available local anesthetics have limitations in action duration. The duration ranges from 3 to 8 hours. Long acting anesthetic agents are particularly desirable to manage postoperative pain, relieve severe pain associated with terminal cancer, and for nerve blocks carried out in pain clinics. In this paper mixture of local anesthetics was formulated into cylindrical pellet using biodegradable polymer and its efficacy and safety was evaluated. Methods: Pellets were prepared by modified melting process with biodegradable polyester 30 wt%, bupivacaine 35 wt%, lidocaine 35 wt% and dexamethasone 0.05 wt% of polymer and drug. In vitro release kinetics of local anesthetics from pellet were determined in PBS at pH 7.4. 37℃, and the released local anesthetics were analyzed by HPLC. Nine male Sprague Dawley weighing 300∼350 gm were implanted with pellets along the sciatic nerve and the sensory blockade was assessed by an analgesiometer. The duration data were analyzed by paired t-test using SAS 6.11 Results: Local anesthetics were released in a controlled manner in vitro. In general, 40~50% of the drug released for the first day, and thereafter approximately 5% released daily. Sensory blockade lasted to beyond 2 days at the dose of 7 mg/100 g bupivacaine and lidocaine respectively. All of the animals exhibited no systemic toxicity and complete recovery. Conclusions: The results indicated that the mixture pellet demonstrated efficient and safe in prolongation of sensory blockade for significant period of time. The mechanisms underlying the mixture effect are under investigation. (Korean J Anesthesiol 1998; 34; 493∼478)

간질환자에서 장기간 항 경련제 치료시 뇌간청각유발전위의 변동

박영춘,이동국,임정근,이상도,이형 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2

저자들은 만성적인 항경련제 투여가 간질환자들의 청신경계에 미치는 영향을 조사하기 위하여 장기간(12개월 이상)항경련제를 복용한 간질환자 51례를 대상으로 이학적 진찰 및 BAEP검사를 실시하고 정상인의 성적과 비교하여 다음과 같은 결과를 얻었다. 장기간 항경련제를 복용한 간질환자의 BAEP검사의 평균 절대 및 파간잠복기는 대조군과 비교하여 유의한 차이가 없었다. Phenytoin단독투여군의 절대 및 파간잠복기는 대조군에 비해 유의한 차이가 없었다. Carbamazepine단독투여군의 I-III파간잠복기는 대조군과 phenytoin단독투여군에 비해 유의하게 연장되었다(p 0.01). Phenytoin단독투여군과 carbamazepine단독투여군에서 항경련제의 복용기간과 BAEP의 절대 및 파간잠복기사이에는 유의한 관계가 없었다. Phenytoin단독투여군과 phenytoin병합투여군에서 각파의 절대 및 파간잠복기는 서로 유의한 차이가 없었다. 이상의 결과로 볼 때 장기간 항경련제를 복용한 간질환자에서 BAEP의 평균 절대 및 파간잠복기는 정상대조군과 비교하여 유의한 차이가 없었고, 항 경련제의 복용기간에 따른 절대 및 파간잠복기의 유의한 변화가 없는 것으로 생각되었다. This study was performed to verify whether or not chronic anticonvulsansts therapy(≥12 months) is associated with brainstem auditory pathway dysfunction in epileptics. Brainstem auditory evoked potentials were done to 51 epileptics who had been taking long term anticonvulasant. The results were summarized as follows. The mean absolute and interpeak latencies were not significantly different between epileptics and controls. The mean absolute and interpeak latencies were not significantly different between epileptics with phenytoin monotherapy and controls. The mean Ⅰ-Ⅲ interpeak latency of carbamazepine monotherapy was significantly delayed than that of phenytoin monotherapy or controls. There was no significant relationship between latency of BAEP and duration of therapy with either phenytoin or carbamazepine. In epileptics with phenytoin combined therapy, the mean absolute and interpeak latencies were not significantly delayed than those of phenytoin monortherapy.

중추신경계질환에서 병소부위에 다른 요류역학적 관찰

이동국,이상도,유영수,박영춘,임정근,이 형 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2

This study was undertaken to evaluate the correlation between urodynamic findings and localization of CNS lesions in patient with voiding disturbance. The patient group consisted of 48 patients (35 male and 13 female) with various localization of CNS lesions confirmed by CT or MRI among which were 9 cerebral cortex, 8 putamen and internal capsule, 6 thalamus and internal capsule, 7 brain stem and 18 spinal core. m and 18 spinal core. Nineteen of the 42 patients with various CNS lesions above sacral crod showed detrusor hyperreflexia. Six of the 7 patients who had suprasacral cord lesion and detrusor hyperreflexia showed detrusor sphincter dyssynergia. In 6 patients with sacral cord lesions, 5 patients showed detrusor areflexa. In summary, detrusor sphincter dyssynergia with detrusor hyperreflexia and detrusor areflexia seemed to be specific urodynamcic pattern of suprasacral spinal cord and sacral cord lesion, respectively. But other CNS lesion showed no consistent specific urodynamic pattern.

열공성 뇌경색과 뇌내출혈의 위험인자 비교

이장준,이현아,최종환,이형,임정근,이상도,박영춘 계명대학교 의과학연구소 2000 계명의대학술지 Vol.19 No.2

Cerebral small vessel disease is the most important cause of lacunar infarction (LI) and intracerebral hemorrhage (ICH). It is generally postulated that, in its early stages, the vascular lesion engenders vessel wall fragility and ICH. But if rupture dose not occur, segmental vessel occlusion evolves, producing LI. It may be a common aging phenomenon that is exacerbated by hypertension and diabetes mellitus. This study was performed to evaluate risk factors of LI and ICH. We reviewed retrospectively the medical records of 690 patients (254 LI, 436 ICH) with stroke who were admitted to Keimyung University Dongsan Medical Center from January 1995 to December 1998. The major risk factors including age, sex, hypertension, diabetes mellitus and several minor risk factors were analyzed in these patients. Older age (p<0.01), male sex(p<0.01), hypertension with treatment(p<0.01), hypertension with long duration(p<0.01) and hypertriglyceridemia(p<0.01), cigarette smoking(p<0.01) were significantly more frequent in LI. Younger age(p<0.01), female sex(p<0.01) and hypertension without treatment(p<0.01), hypertension with short duration(p<0.01) were more frequent in ICH. The prevalence, duration and treatment of diabetes mellitus were not different between these two groups. This study show that the age, sex, treatment of hypertension, duration of hypertension and cigarette smoking seem to be significant risk factors between LI and ICH.