소뇌에 발생한 Nocardiosis : 증례 보고 Case Report

성연상,김상진,박순필,강재규,도종웅 대한신경외과학회 1989 Journal of Korean neurosurgical society Vol.18 No.6

The authors report a extemely rare case of primary cerebellar nocardial abscess. Cerebral nocardiosis is rare disease and often fatal, and often fatal, and commonly spreaded from nocardiosis of lung or skin. Total excision of abscess and medication with sulfonamide is the treatment of choice. The patient was treated by continuous external dirainage with intermittent irrigation of abscess cavity by sulfonamide and given with sulfonamide for 10 months.

상아질 표면 처리에 의한 상아질과 복합레진의 결합에 관한 연구

윤동호,박상진 大韓齒科保存學會 1992 Restorative Dentistry & Endodontics Vol.17 No.1

The purpose of this study was to compare the shear bond strengths to ground dentin surfaces of four dentinal bonding agents in 193 teeth. Various dentin surfaces treated with four dentin bonding agents were attached with two restorative composite resins. The effevtiveness of the bonding were tested by the monitoring the shear bond strength. The shear bond strengths were measured after 2 hours and 24 hours after surface conditioning with four dentin bonding agents. Effects of EDTA, the additive illumination, and sealer treatments without primer on bond strength to dentin sufraces were assessed. In addition the effects of the thickness of specimens ranging from 0.65 mm to 1.95 mm and the ratio of catalyst and base paste on the bond strength of chemical cure composite resin were estimated. The shear bond strength was determined by testing specimens in the Instron universal testing machine(Model No.1122) at a crosshead speed of 1.0mm/min Following conclusions were drawn: 1. The highest mean shear bond strengths of chemical cure composite resin to dentin conditioning with dentin bonding agents aged 2 hours were obtained, and then that was decreased with time followed by EDTA treatment. 2. In light cure composite resin, the shear bond strength was increased following dentin conditioning with bonding agents with time, irradiation time and EDTA treatment except in SB group. 3. The thicker the composite resin specimen was, the less the shear bond strength in chemical cure composite resin was. 4. In light cure composite resin, there was a little change in shear bond strength following dentin conditioning with bonding agents. 5. In chemical cure composite resin, the shear bond strength was the highest in the ratio of 1/1 of catalyst and base part. 6. Without a dentin primer, shear bond strength to dentin conditioned only with UB sealer was the hightest among four sealers in light cure composite resin.

정밀주조 다이캐스팅을 이용한 자동차 레귤레이터 하우징 성형해석에 관한 연구

성백섭,김미애,차용훈,김정대,김덕중,이연신 한국공작기계학회 2006 한국공작기계학회 추계학술대회논문집 Vol.2006 No.-

The casting defects that are caused by molten metal were cold shut formation, entrapment of air, gas, and inclusion. But the control of casting defects has been based on the experience of the foundry engineers. In this thesis, the computer simulation analyzed the flow of molten metal. The quantitative analyses which proposed the effective mold design was executed Flow patterns of 0.1-0.16m/s molten metal in 15mm thin plate casting were investigated in order to optimize die-casting process. As increasing ingate velocity in thin plate casting, cold shot was decreased. The parameters of runner shape that affected on the optimized conditions that was calculated with simple equation were investigated. These die casting process control techniques of automobile regulator housing parts have achieved good agreement with the experimental data of tensile strength, hardness test, and material structure photographies satisfactory results.

상태 필드를 이용한 다중스레드 구조

윤성대 釜慶大學校 1998 釜慶大學校 論文集 Vol.3 No.2

In this paper, we have presented a high performance MULVEC (MULithreaded architecture for the VEctor Computations), as a building block of massively parallel processing systems. MULVEC comes from the synthesis of the dataflow computation model and the existing superscalar RISC microprocessor. MULVEC is composed of two processors: Vector memory control and Synchronization Processor (VSP) and Data Processor (DP). VSP manages and synchronizes datum, and DP computes datum. MULVEC have made to reduce, using the packing method and a non-blocking mode, the number of messages, the length of a queue, the number of synchronizations and context switchings, and so on. The execution time and processor utilization are evaluated for the benchmark programs on SPARC V9 (superscalar 64-bit RISC microprocessor). The result of evaluation shows that the execution time of MULVEC is less than that of uniprocessor when the number of nodes of equal to or more than three. Applications such as signal processing, image processing, and scientific computations require a lot of vector computations and they can be calculated efficiently using MULVEC.

후두와 종양에서의 무언증 : 증례 보고 A Case Report

성연상,강재규,도종웅,김기욱,김상진 최신의학사 1991 最新醫學 Vol.34 No.1

제주 동부지역 지하수 인공함량에 관한 연구

윤정수,신희섭,박상운 濟州大學校 基礎科學硏究所 1996 基礎科學硏究 Vol.9 No.2

The purpose of this study is to examine the comprohensive field test of the artificial groundwater inflow method where the east confined aquilfer selected for study that was badly degraded by sea water. The stream order of Cheunmichen has the 6th order whereas Kamachen is the 4th order. The bifurcation ratio is 2.50 in the Gheunmi stream and 2.42 in the Kama stream, which indicates that the studied stream is flows steeper slope region and belong to the short period of erosional streams. Average annual precipitaion is 2.024.9mm. Total precipitation in 4 months from June to September amounts to 48% out of annual precipitation and them run off the stream flows. Evapotranspiration is about 750.2mm, estimating the run-off of the surface is about 318.8mm and total amount of the recharge to aquifer is 956.4mm/yr. when precipitation is about 312mm from July first to third in 1995 in study area. The surface run-off of cheunmichen were calculated as about 10825.790㎥/24hr, and the total amount of inflow from the 4 recharge wells to aquifer is about 55.468㎥/24hr., when precipitation is about 312mm from July first to third in 1995 in study area. Injection was begin in 4 wells from July second to third in 1995, the groundwater levels for observatory A well is increase to 0.418m, 0.109m respectively rather than that the original levels. The purpose of this study is to examine the comprehensive field test of the artificial groundwater inflow method where the east confined aquilfer selected for study that was badly degraded by sea water. The stream order of Cheunmichen has the 6th order whereas Kamachen is the 4th order. The bifurcation ratio is 2.50 in the Gheunmi stream and 2.42 in the Kama stream, which indicates that the studied stream is flows steeper slope region and belong to the short period of erosional streams. Average annual precipitaion is 2.024.9mm. Total precipitation in 4 months from June to September amounts to 48% out of annual precipitation and them run off the stream flows. Evapotranspiration is about 750.2mm, estimating the run-off of the surface is about 318.8mm and total amount of the recharge to aquifer is 956.4mm/yr. in 1995 in study area. The surface run-off of cheunmichen were calculated as about 10825.790㎥/24hr, and the total amount of inflow from the 4 recharge wells to aquifer is about 55.468㎥/24hr.,when precipitation is about 312mm from July first to third in 1995 in study area. Injection was begin in 4 wells from July second to third in 1995, the groundwater levels for observatory A well is increase to 0.418m, 0.109m respectively rather than that the original levels.

규칙적 장기간 운동이 성인여성의 골밀도 함량, 최대 산소섭취량과 각신전력 변화에 미치는 영향

윤성원,강영석,나윤수 서울여자대학교 자연과학연구소 1996 자연과학연구논문집 Vol.7 No.-

The purpose of this study was to examine the effect of organized walking (n=9) and badminton exercise (n=9) on bone density, maximal oxygen consumption, and leg extensor intake during 6-month period of experiment with middle-aged women(48-56 years). Subjects (n=18), regularly participating to a social sport oenter, were practiced an assigned exercise 3 times a week and measurements were taken every 3-month. after the program being initiated Bone density was measured by DEXA method, VO?? by a rpogressive work load exercise, and leg extensor by isokinetic equipment. The following results were obtained from data analyses : 1. For walking group, the 6-month exercise with a regular time interval resulted in an increase in the bone density of back lumber (L1-L4). On the other hand, for badminton group, an increase was shown in the bone density of head of thigh. 2. For both groups, les extensor was significantly increased over the 6-month experimental period. 3. Subjects in walking exercise group showed an significantly increased VO?? over the experimental period while badminton group did not. These conclusions suggest that an exercise prescriptor should design an exercise program such a way that it includes both a resistance training and aerobic exercise in order to increase bone density, which has a prevention effect against aging and bone fracture, as well as to enhance strength of leg muscle and VO??.

일부 법인 택시 노동자의 교통사고와 볼안전운전행동에 미치는 인적요인

윤간우,이상윤,임상혁 대한산업의학회 2006 대한직업환경의학회지 Vol.18 No.4

목적: 본 연구는 택시 업종을 대상으로 택시노동자의 다양한 인적특성들이 불안전운전행동을 매개로 교통사고와 어떠한 관련성이 있는지 살펴보고자 한다. 방법: 총 6개 택시사업장에 335명의 택시노동자를 대상으로 연구를 수행하였다. 자기기입식 설문조사 방법으로 지난 1년간 교통사고 횟수와 운전 중 불안전한 행동수준을 파악하였다. 이에 영향을 미칠 것으로 예상되는 개별 노동자의 인적 특성을 수집하여 요인분석을 통해 직무요인, 정신건강요인, 연령요인, 건강습관요인, 수면요인으로 범주화 하였고 위계적 다중회귀분석을 통해 이들 요인들이 불안전운전행동을 매개로 교통사고 횟수에 미치는 영향을 살펴보았다. 결과: 위계적 다중회귀분석 결과, 직무요인(β: 0.122), 수면요인(β: 0.114), 그리고 불안전운전행동(β: 0.018)은 교통사고 횟수에 직접적인 영향을 미치는 요인으로 나타났다. 불안전운전행동을 통해 교통사고 횟수에 간접적인 영향을 미치는 요인은 직무요인(β: 1.319), 정신건강요인(β: 6.429), 건강습관요인(β: 1.177)이었다. 결론: 본 연구 결과 택시 교통사고는 택시노동자의 일반적 특성, 정신건강상태, 직업적 특성이 불안전운전행동을 매개로 직·간접적인 영향을 미치고 있었으며, 효과적인 택시 교통사고 예방을 위해서는 이들 인적 요인에 대한 적절한 대책이 필요할 것이다. Objective: This study investigated the driving habits of taxi drivers, in order to examine the characteristics of human factors causing traffic accidents and unsafe driving behavior and to determine any relevancy among them. Method: Taxi drivers (N=335) answered a questionnaire investigating various measures of human factors, unsafe driving behaviors, and number of traffic accident experiences in the previous year. In factor analysis, the characteristics of human factors were classified into 5 common factors: job, mental health, age, health habit and sleep factor. A contextual mediated model was proposed to distinguish the distal (5 common factors) and proximal (unsafe driving behaviors) factors in predicting traffic accident involvement by hierarchical multiple regression. Result: In hierarchical multiple regression, job factor(β: 0.122), sleep factor (β: 0.114) and unsafe driving behaviors (β: 0.018) yielded a direct effect on the rate of traffic accidents. Mental health factor β: 6.429), job factor (β: 1.319) and health habit factor(β: 1.177) yielded a indirect effect on the rate of traffic accidents by unsafe driving behaviors. Conclusion: Various human factors co-related by the unique characteristics that exist in the taxi service industry have significant effects on the rate of traffic accidents mediated by unsafe driving behaviors. Therefore a proper countermeasure against these factors should be established in order to effectively reduce the rate of taxi accidents.

단 1차형 영구자석 선형 동기전동기의 디텐트력 저감 연구

연승환,이종진,함승진,고창섭 충북대학교 컴퓨터정보통신 연구소 2006 컴퓨터정보통신연구 Vol.14 No.1

최근 영구자석 선형 동기 전동기 (PMSLM)는 이송 장치로써 많은 분야에 사용되고 있다. 영구자석 선형 동기 전동기는 구조적으로 간단하며 고속화 고추력화 등의 많은 장점을 가지고 있다. 그러나 단 1차형 영구자석 선형 동기 전동기는 매우 큰 디텐트력을 지니고 있어 추력 맥동의 원인이 되며, 이는 소음과 진동을 발생시킨다. 단 1차형 영구자석 선형 동기 전동기의 디텐트력은 전기자 내부의 치와 영구자석 사이에 작용하는 힘과 전기자 양 단부와 영구자석 사이에서 작용하는 힘의 합으로 표현된다. 본 논문에서는 코깅력을 줄이기 위한 방법으로 영구자석의 극 수와 전기자의 슬롯 수의 비를 변경한 새로운 구조의 단 1차형 영구자석 선형 동기 전동기(PMLSM)을 제안하였고, 단부력을 줄이기 위하여 전기자 양 단부에 전기자 길이 조정법과 챔퍼링 법을 사용하였다. Recently Permanent Magnet Linear Synchronous Motors(PMLSMs) are widely being used for many linear transportation applications. The PMLSMs have many advantages such as simple structure, high speed and thrust force. However, especially in short primary type PMLSM, the PMLSMs have very large detent force, which makes the thrust force ripple and undesired vibration and noise. The detent force in PMLSMs is composed of two forces. The first is the cogging force which comes from the interaction between the permanent magnets and interior teeth of the stator, and the second is the end effect force which acts on the exterior teeth of the stator by the permanent magnets. This paper presents a new configuration of a short primary type PMLSM for cogging force reduction by changing the ratio of the numbers of winding slots and permanent magnet poles. The end effect force is also minimized by optimizing the stator length and chamfering the shape of the exterior teeth of the stator.

토양 내 수속성 유기물에 대한 천연계면화성제의 작용

윤상혁,조대철 순천향대학교 산업기술연구소 2002 순천향 산업기술연구소논문집 Vol.7 No.2

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