Box-Jenkins 모형을 이용한 X￣관리도와 CUSUM관리도의 민감도 분석

송서일,이보근,조영찬 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2

It is revealed that, as the use of automated manufacturing is increasing and the process inspection technology is improvements in industry for recently years, the data from mass production system is exhibited some degree of autocorrelation. The operation characteristics of traditional control charts developed under the assumption of independence may be adversely affected by the presence of serial correlation. Therefore, we try to explain a autocorrelated construction by being in contact with a time-series models, so called the Box-Jenkins forecast models, which has been proposed as a very good forecasting tool and allows to distinguish the variations resulted from a autocorrelation structure from one due to unusual but assignable causes. In this paper, autoregressive/moving average parameters in the use of Box-Jenkins forecast models is estimated, and a sensitivity analysis is given by comparing X control chart with CUSUM control chart for the variation of error or forecast residuals.

뇌에 양극성 전기응고강도의 효과와 시간경과에 대한 실험적 연구

송근성,이영우 부산의대 1988 부산의대잡지 - 부산대학교 의과대학 Vol.28 No.2

Carnegie stage 16에 속하는 배자 1 예의 기술

황영일,송형근 충북대학교 의과대학 충북대학교 의학연구소 1991 忠北醫大學術誌 Vol.1 No.1

자궁외임신으로 적출된 난관에서 발견된 배자를 수평 연속절편을 시행하여 관찰하였다. 심장의 심방심실관과 출구는 아직 분리되지 않았으며 첫째심방사이중격과 첫째심방사이구멍이 관찰되었다. 팽대한 위는 장축을 중심으로 90° 회전하였으며 망낭이 형성되었다. 배쪽 및 등쪽췌장이 아직 합쳐지지 않았고 소장과 대장은 전체적으로 장간막에 의해 후복벽에 부착되어 있으며 창자고리를 형성하였는데 그 일부가 탯줄로 탈장되었다. 창자고리는 90° 정도 회전하였고 아래고리에서는 맹장을 확인할 수 있었다. 기관과 식도는 완전히 분리되었으며 호흡기도는 이차기관지까지 형성되었다. 후복벽의 중간신장능선에는 일련의 중간신장이 잘 발달되었고 후신장은 그 끝이 둘로 갈라진 신장깔때기를 둘러 싸는 후신장발생모체의 형태로 나타났다. 배설강이 비뇨직장중격에 의하여 직장과 원시비뇨생식동으로 일부 분할되었다. 망막의 바깥층에서 색소가 관찰되었으며 귀소포에서 분리된 속림프관은 그 길이가 매우 길었다. 이상과 같은 소견으로 미루어 저자들은 본 배자가 Carnegie stage 16에 속하는 것으로 판단하였다. A human embryo obtained from a salpinx removed for the treatment of tubal gestation was serially sectioned and observed. The endocardial cushions were bulky at the atrioventricular canal and at the outflow tract of the heart, but each pathway not divided. The septum primum with ostium primum was observed. The stomach showed dilated lumen and rotated 90° clockwise along the longitudinal axis, resulting in the formation of the omental bursa. The dorsal and ventral pancreases were not yet fused to each other. A definitive mesentery anchoring the small and large intestine was recognized. The intestinal loop was herniated into the extraembryonic coelom, and rotated 90°counterclockwise. The cecum was easily identifiable, but not the vermiform appendix. The trachea was completely seperated from the esophagus, and the bronchial tree showed the formation of the secondary bronchi. A series of well-developed mesonephric tissues was observed in the mesonephric crest. The metanephros appeared a condensed mesenchyme surrounding the bifurcated renal pelvis. The cloaca was partially divided into the rectum and the primitive urogenital sinus by the urogenital septum. The retinal pigments began to appear in the outer layer of the optic cup. The formation of the lense fiber was not so evident. The otic vesicle showed a long, slender endolymphatic duct. Based on the above findings, we concluded that this embryo belonged to Carnegie stage 16.

Hg₁-xMnxTe산화막의 홀효과에 관한 연구

오재근,최기영,송재흥,김영국,채건식,주유환,설정식,손인호,차성극,이상찬 慶南大學校 附設 基礎科學硏究所 1996 硏究論文集 Vol.8 No.-

HClO₄(pH:2) 수용액에서 양극산화 방법으로 HgMnTe(HMT)의 표면에 산화막을 형성 시켰다. 산화막의 두께는 SEM으로 측정하였으며 10㎛였다. 전류-전압 특성곡선을 얻어 산화 피크 전압으로부터 HTeO₂?, TeO?, HHgO₂? 막이 형성되었음을 알 수 있었다. 산화시키지 않은 HMT와 HClO₄수용액에서 산화시킨 HMT에 대해 Hall전압 및 자기저항을 각각 측정하였다. 홀전압과 자기저항은 HMT보다 HMT산화막에서 더 컸으며 이것은 HHgO₂? 공격자가 홀의 역할을 하고, TeO₄? 산화막은 전하의 포획도를 낮게하기 때문으로 생각할 수 있다. Anodic oxidation processes on HgMnTe surface has been studied in standard aqueous HClO₄(pH:2) solution. The 10㎛ thickness of the anodic oxide layers was measured by SEM. The Composition of the anodic oxide layers are evaluated from current-voltage(I-V) characteristic of HgMnTe Oxidation. The layers are composed of mixed oxide. ??, TeO₄, and?? in HClO₄solution. Transport properties have been investigated in HMT oxide layer made in HClO₄solution and virgin HMT samples at 300K. Hall voltage and magnetoresistance are greater in oxide layer HMT than virgin HMT. As a result, we know that the vacancy of ??in an anodic oxide layer acts as hole and the resulting oxide ?? layer exhibit a reduced degree of charge trapping and increase magnetoresistance.

조경블럭을 이용한 환경친화적 보강토옹벽의 시공사례연구

한중근,송영석 중앙대학교 기술과학연구소 2003 기술과학연구소 논문집 Vol.33 No.-

블록식옹벽은 다양한 토목 및 건축공사에서 적용되고 있으나, 옹벽시공시 환경친화적 요소의 유무가 점 차 문제화 되면서 공공공사에서는 특히 설계요소로서 인간생활과 친밀해질 수 있는 특징으로 친환경적 요소가 필요하게 되었다. 이러한 관점에 주안을 두고 친환경적 요소를 갖는, 즉 식생이 가능한 보강토블록으로서 그린스톤이 개발되었다. 그린스톤블록은 조경용 블록으로서 도심지등에서 많이 적용되며, 식생 조건에 맞는 자동화된 배수체계를 도입하였다. 그러나, 그린스톤은 직립옹벽의 형상으로 제한된 높이와 국부파괴의 위험이 상존함을 시공사례 고찰을 통해 확인하였다. 이를 만족하기 위해, 뒤처짐경사를 갖는 친환경적 블록으로서 중력식블록세트(그린스톤플로, 연결축 및 고정축)가 개발되었고 개발된 시스템의 시공사례를 이용하여 문제점을 고찰하여 시공 및 설계기준을 마련하였다. 중력식블록옹벽의 설계 및 시공시 주의할 점은 부등침하의 원인이 되는 기초지반의 지지력, 옹벽배면에서의 배수무네가 가장 큰 문제이었으므로 본 연구에서는 블록식옹벽 시공시 적합한 관리 및 설계기준으로 기하수위, 기초지지력 및 배수조건에 대하여 제시하였다. 특히, 도심지내에서는 친환경적요소의 특징이 더욱 발휘될 수 있음을 확인할 수 있었다. The SRW(segmental retaining wall) including soil-reinforcement retaining wall has been used for various construction works in Civil and Architectures works. But the non-environmental factors in this system are one of significant problems. Then, the environmental factors within familiarity in field were become to the design factor in the public works. The Green Stone was developed. which can be planting and can be make a possible to construction of closed environmental structures. This landscape block can be automatically management of lowers and plants at spaces between blocks in all seasons using the drop water system. The existing systems have got usually the possibility of local failure. Through case studies, the shapes of block were improved to gravity Green Stone FLO. That is composed to three parts as follows; Green Stone FLO, Trunk-Bar and Anchor-Joint. This system was satisfied for the problem of structure stability with setback. The significantly considering problems at design and construction of soil-reinforcement retaining wall are he bearing capacity of foundation to the control of non-uniformed settlement and drainage system in retaining wall backside. In study, therefore, the design criteria and its control conditions were suggested to on the groundwater level, foundation bearing capacity and drainage conditions. The feature of gravity block including environmental factors could be defined, especially, the advantages of improved block appeared and shown in downtown.

전치부 개방교합자와 정상교합자의 이설근 및 구륜근 활성도에 관한 비교 연구

강용,송형근,윤영주,김광원 대한치과교정학회 1995 대한치과교정학회지 Vol.25 No.2

이 연구는 정상 교합자와 개방교합자 사이에, 측모두부방사선계측사진 분석을 하고, 이설근과 구륜근의 활성도를 비교하여 근활성도와 골격의 형태간에 상호 상관 관계를 알고자 하였다. 연구 대상으로는 전신건강 상태가 양호하고, 교정치료 경험이 없으며, 악관절 장애가 없는 Angle Ⅰ급 교합관계를 가진 20명의 정상교합자와 overbite가 -0.5에서 -6mm인 19명의 개방교합자를 선정하였으며, 각 대상에서 측모두부방사선계측사진을 촬영하여, 20가지 항목을 계측하고, 안정위, 연하시, 개구시, 등장성 혀 내밀기, 최대 혀 내밀기때의 이설근과 구륜근의 근활성도를 관찰하고, 근활성도와 골격의 형태간에 상관관계를 알고자 하였다. 이 연구로부터 얻어진 결과는 다음과 같다. 1. 안정위를 제외하고, 이설근의 근활성도는 개방교합자에서 정상교합자보다 유의성있게 높았다. 2. 연하시를 제외하고, 구륜근의 근활성도는 개방교합자에서 정상교합자보다 유의성있게 높았다. 3. 최대 혀 내밀기에서 개방교합자의 이설근이 가장 높은 근활성도를 보였다. 4. 골격형태와 이설근과 구륜근의 상관관계가 정상교합군에서는 적고, 개방교합군에서는 더 많은 항목에서 유의성있는 상관관계가 있었다. This study was undertaken to investigate the activities of genioglossus and orbicularis oris muscle between occlusion and anterior open bite group. 39 subjects without the experience of orthodontic treatment and T.M.disorder were selected for this study. 20 subjects were normal occlusion, 19 subjects were anterior open bite. The twenty items were measured from the cephalometric headplates, and EMG recording of the genioglossus, orbicularis oris muscle were taken at rest position., water swallowing, jaw opening, isometric tongue protrusion, maximum tongue protrusion. All data were analyzed and processed with the computer statistical method. The following results were obtained : 1. Except at rest position, the muscle activities of genioglossus muscle in anterior open bite were higher than in normal occlusion with significatn difference. 2. Except druing water swallowing, the muscle activities of orbicularis oris muscle in anterior open bite were higher than in normal occlusion with significant difference. 3. During maximum tongue protrusion, the geniolossus muscle of anterior open bite subjects showed the highest muscle activity. 4. Anterior open bite showed closer interrelationship between facial morphology ad the genioglossus, orbiculars oris muscle activities than that of normal occlusion with significatn difference.

광양지역의 지반전단강도 증가 특성

홍원표,송영석,이근하 중앙대학교 기술과학연구소 2000 기술과학연구소 논문집 Vol.30 No.-

본 연구에서는 연약지반개량공사가 실시된 광양지역을 대상으로 압밀기간동안 개량지반의 물리적, 역학적 변화특성 및 개량효과를 고찰되어 있다. 지반개량전 원지반에서 시료를 채취하고, 모래말뚝 타설직후, 압밀방치중(예상압밀도 50%) 및 압밀완료시(예상압밀도 90%)에도 시료를 채취하여 각각 토질정수를 조사 비교하였다. 그 결과 압밀이 진행되는 동안 지반의 강도는 증가하여, 일축압축강도로 구한 점성토지반의 강도증가율(C_u/P_o)이 0.36이 되었다. 그리고, 일축압축강도로 구한 점성토지반의 강도증가율(C_u/P_o)이 0.36이 되었다. 그리고, 일축압축강도와 함수비는 최대압밀응력에 대하여 유일함수관계를 보이고 있으며, 압밀완료시점(예상압밀도 90%)에서 추정된 비배수전단강도는 측정된 비례수전단강도와 비교적 잘 일치한다. In this study, both physical and mechanical properties of soft grounds are investigated during improvement works of soft grounds in Kwangyang. The properties of soil before ground improvement are compared with the properties of the improved ground after Sand Compaction Pile installation, during consolidation(degree of consolidation 50%), and at the end of consolidation(degree of consolidation 90%). From this result, improvement of the shearing strength of soft grounds can be deserved during consolidation, and the improving rate of shearing strength C_u/P_o is 0.36. The relationship between the shearing strength by unconfined compression tests, consolidation stress and water content shows that both the shearing strength and water content have an unique function relationship. The shearing strength predicted by Rutledge hypothesis shows relatives good agreement with the field strength.

Zn₁-xFexSe의 고유결함에 관한 연구

박남천,송재홍,채건식,오재근,김영국,손인호 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-

We studied the native defects of dilute magnetic semiconductors Zn₁-xFexSe epilayer by using SAW device. The energy gap of Zn₁-xFexSe for each epilayer(x=0.0213, 0.0915) was 2.57eV, 2.74eV at room temperature (294K). The trap level for x=0.0213, 0.0915 were calculated by measuring Transverse Acoustoelectric Voltage(TAV). Also we can calculated cross section.

수평유동장에서 난류증진을 위한 초음파 적용에 관한 연구

최우창,박영호,송민근,주은선 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-

A study on the application of ultrasonic vibration for the turbulence enhancement in a horizontal flow field was carried out by laying emphasis of the Reynolds numberand the ultrasonic incidence angle on the laminar flow field. A large water tank was made of the transparent acrylic plates and city water of 25℃ was used as working fluid. Angles of the ultrasonic oscillator such as 30°, 45° , 60° , 90° , 120° , 135° and 150° were selected and experiments for the above were made. Data, such as time mean velocity vector and time mean turbulent intensity which was obtained by PIV measurement, were examined, compared and discussed at Reynolds No. 2,000 and 4,000 to know the degree of turbulence enhancement in each case.

입원 환자 영양검색 전산 프로그램 개발

안수미,윤기영,신연명,최경현,임근승,장문경,송윤미,공은희 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

Background : About 30% of patients in the hospital are under nourishment. A large portion of people are undernourished when they are admitted to the hospital and in the majority of these, undernutrition develops further while in hospital. Patient-Generated subjective global assessment(PG-SGA), a method of nutritional assessment based on clinical judgment, has been widely used to assess the nutritional status of adults for both clinical and research purposes. Modified PG-SGA can be used as a nutrition screening tool, and a comprehensive nutrition assessment is desirable for those who are malnourished. The purpose of this study is to develop a simple, reliable and valid nutrition screening program(NSP). Methods : We applied the nutrition screening program(NSP) to adult inpatients who are at risk of malnutrition using the Modified Patient-Generated subjective global assessment(PG-SGA) and objective assessment(electrical medical record data). Results : Therefore simple and beneficial NSP is developed for patients with severe malnutrition. Using NSP. nutritional information of the severe malnutrition patient should be shared with the physicians and they should be taken care of by clinical dietitians to improve their nutritional status. Conclusion : The Modified PG-SGA and nutrition screening tool are simple, reliable and valid nutrition screening program(NSP).