• 한국정보과학회논문지:시스템및이론
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• 제29권7호
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• pp.411-421
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• 2002

본 논문에서는 마이크로어레이 처리를 위한 새로운 이미지 분석 알고리즘과 격자 반점들의 위상 정보를 이용하여 격자의 위치를 결정하는 방법을 제시한다. 마이크로어레이는 유전자의 발현량의 측정을 위해서 수만 혹은 수십 만개의 유전자에 대해서 한번에 실험을 할 수 있는 장비이다. 한번의 실험으로 생성되는 데이터 양이 엄청나게 많기 때문에 자동화된 분석이 필요하다. 이 마이크로어레이의 실험 결과는 16-비트 회색조 이미지 파일로 하나의 유전자가 여러 개의 픽셀로 뭉쳐져 있는 반점(spot)이 격자 구조형태로 나타난다. 본 논문에서 이미지 데이터에서 그래프 구조를 생성하여 이들 반점이 어느 격자에 속하는지 결정하는 알고리즘과 격자 구조의 기울어짐을 측정하여 격자의 정확한 위치와 모양을 결정하는 방법을 제시하고 실제 이미지 데이터를 통한 많은 실험 결과를 보여 준다.

• 대한한방체열의학회지
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• 제4권1호
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• pp.23-28
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• 2005

Purpose : To examine the relation between male infertility and cold hypersensitivity on lower abdomen. Methods : From 2004, 4 to 2005, 10, a total 60(infertile male 30, normal male on semen analysis 30) patients who visited the Oriental gynecological department of Conmaul Oriental Medicine hospital was selected, and their medical records were reviewed retrospectively. We compared the temperature of 3 points(CV17, CV12, CV4) of both group by DITI(Dorex, DITI-16UTI and DITI-Spectrum 9000 MB). Results and Conclusion : The general characteristics such as age, weight, height, BMI, amount and frequency of drinking and smoking of both group were not different statistically. The mean ${\Delta}T1$ between upper and lower abdomen in infertile group was higer than in normal group but they were not different statistically. The mean ${\Delta}T2$ between chest and lower abdomen was $0.46{\pm}0.41$ in infertile group, and $0.18{\pm}0.56$ in normal group, and it shows significant difference statistically. There was no significant relationship between sperm motility and ${\Delta}T1$, ${\Delta}T2$ in infertile group. In this study, we suggest that an inclination of cold hypersensitivity of lower abdomen of infertile male, but it is expressed when it is contrasted to chest of the body rather than upper abdomen.

• The Journal of Advanced Prosthodontics
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• 제8권2호
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• pp.116-124
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• 2016

PURPOSE. The aim of the present study was to evaluate, by means of strain gauge analysis, the effect of different implant angulations on strains around two implants retaining mandibular overdenture with Locator attachments. MATERIALS AND METHODS. Four duplicate mandibular acrylic models were constructed. Two implants were inserted in the canine regions using the following degrees of distal inclinations: group I (control); $0^{\circ}$, group II; $10^{\circ}$, group III; $20^{\circ}$, and group IV; $30^{\circ}$. Locator pink attachments were used to connect the overdenture to the implants and Locator red (designed for severely angled implants) was used for group IV (group $IV_{red}$). For each group, two linear strain gauges were attached at the mesial and distal surfaces of the acrylic resin around each implant. Peri-implant strain was measured on loading and non-loading sides during bilateral and unilateral loading. RESULTS. For all groups, the mesial surfaces of the implants at loading and non-loading sides experienced compressive (negative) strains, while the distal implant surfaces showed tensile (positive) strains. Group IV showed the highest strain, followed by group III, group II. Both group I and group $IV_{red}$ showed the lowest strain. The strain gauges at the mesial surface of the loading side recorded the highest strain, and the distal surface at non-loading side showed the lowest strain. Unilateral loading recorded significantly higher strain than bilateral loading. CONCLUSION. Peri-implant strains around two implants used to retain mandibular overdentures with Locator attachments increase as distal implant inclination increases, except when red nylon inserts were used.

• 한국전문물리치료학회지
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• 제12권2호
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• pp.44-57
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• 2005

The objectives of this study were to examine the relative efficacy of three active exercise programs for work-related, chronic low back pain, and to observe to what extent the programs affected the mechanical stability of the lumbar region. The subjects were 64 employees who were randomly divided into three groups to match the three active exercise programs which were performed 3 times a week for 6 months. All subjects were assessed with the same measurements at a pre-study examination, and then were reassessed at 2 weeks, 3months and 6 months after the study. The pain intensity didn't show any significant difference among the three groups. However, the Oswestry Disability Index showed significant differences among the three groups at 6 months and the lumbar and thoracic exercise groups showed significant decreases compared to the general physiotherapy group (p<.05). Maximal stretching with both hands in the overhead direction showed a significant difference among the three groups at 3 months and 6 months, and the thoracic exercise group at 6 months showed a significant increase in overhead stretching compared to the lumbar exercise and general physiotherapy groups (p<.05). The group that performed maximal stretching with both hands in the overhead direction showed the most significant among the 3 months and 6 months. At 6 months, the thoracic exercise group showed a significant increase in overhead stretching compared to the lumbar exercise and general physiotherapy groups (p<.05). The lumbar region angle of inclination showed significant differences among the three groups at 2 weeks 3 months, and 6 months, with the thoracic exercise group being decreased more significantly at 6 months than the lumbar exercise and general physiotherapy groups (p<.05). Exercise aimed at increasing thoracic mobility has an effect on lumbar stability. Furthermore, it is far more effective for lumbar stabilization than general physiotherapy and deep muscle strengthening lumbar exercise.

• 대한토목학회논문집
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• 제34권1호
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• pp.167-173
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• 2014

석션 매입 앵커(Embedded Suction Anchor; ESA)는 석션 기초(Suction Pile or Caisson)을 이용하여 앵커를 지중에 매설한 후 인발에 저항하는 계류앵커형식이다. 본 연구에서는 ALE (Arbitrary Larangan Eulerian) Adpative Meshing 기법을 이용한 수치해석을 통해 석션 매입 앵커의 인발 거동을 모사하고, 그 결과를 기존 연구에서 수행된 원심모형 실험 및 한계 평형법을 이용한 해석적 방법의 결과와 비교 분석 하였다. 이를 통해 앵커의 수평 연직 경사 방향의 인발 거동을 평가하였으며, 수치 해석 결과, 수평 재하 시 중간 위치에서 가장 큰 저항력을 발휘하는 것으로 나타났다. 연직 재하의 경우 재하 위치와 무관하게 유사한 저항력이 발휘 되었으며, 수평 저항력이 가장 큰 중간 위치에서 경사 하중을 가한 결과 경사각이 증가할수록 인발 저항력이 감소하는 것으로 나타났다.

• 자원환경지질
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• 제19권2호
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• pp.153-163
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• 1986

Paleomagnetic and geological studies of volcanic and sedimentary rocks of Jeju Island have been carried out to determine the position of virtual geomagnetic pole(VGP), and to estimate the geological sequence and their age. As a result of paleomagnetic studies, the reversal polarities are measured in the Sanbangsan trachyte and Hwasun formation, and the normal are the rest. In case of normal polarity, the mean values of declination and inclination are $2.3^{\circ}$ and $48.4^{\circ}$, respectively, and the average value of VGP is $85.4^{\circ}N$ and $79.9^{\circ}W$. The locations of VGP's are coincident with those obtained from world-wide Plio-Pleistocene rocks. The Hwasun formation and Seongsan formation which have been known to be sedimented in the similar time in the 2nd-stage of volcanic eruption, possess reversal and normal polarities, respectively. This fact brings about the result that two formations should be separated in a sense of geological sequence. Consequently, the geological sequence of the 2nd-stage of volcanic eruption is Pyoseonri basalt-Seoguipo hawaiite-Hwasun formation-Seongsan formation-Jungmun hawaiite-Sanbangsan trachyte. Referring to the paleomagnetic studies and the previous and present geological studies, Seoguipo formation corresponds to the Gauss normal epoch, the 2nd-stage of volcanic eruption to Matuyama reversed epoch, and the 3rd-, 4th-, and 5th-stages to Brunhes normal epoch. Therefore, the Seoguipo formation is mostly sedimented during late Pliocene and/or presumably extended to the early Pleistocene. The rocks of the 2nd- to 5th-stage are formed later than this.

• 자원환경지질
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• 제27권1호
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• pp.49-63
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• 1994

Paleomagnetic study of Tertiary rocks in Pohang area has been carried out to determine the characteristic directon of natural remanent magnetization, the position of paleomagnetic pole, the stratigraphic correlation, and the tectonic movement. A total of 196 specimens was collected from 5 sites in the Pohang Basin, 19 sites in the Janggi Basin, and 10 sites in the Eoil Basin, respectively. The mean declination and inclination of 4 sites (3 sites in the Yonil Group and 1 site in the Yonil Basalt) are $-3.2^{\circ}$ and $54.3^{\circ}$, and yield the paleomagnetic pole position $86.9^{\circ}N$ and $7.7^{\circ}E$. These are the characteristic direction and pole position of Miocene Epoch by comparison with contemporary Eurasian and Chinese data. The characteristic direction and pole position of remaining 30 sites are $47.6^{\circ}$ and $57.5^{\circ}$, and $52.3^{\circ}N$ and $201.5^{\circ}E$, respectively. These show clockwise rotation of $50.8^{\circ}$ with respect to the Miocene ones resulted by a tectonic movement before the deposition of the Hakjeon Formation of the Yonil Group about 15~16 Ma in the study area. The mechanism of the clockwise rotation is considered to be the dextral movement of the Yangsan Fault presumably caused by the opening of the East Sea. The Yonil Basalt is reclassified into pre- and post-deposition of the Yonil Group, i.e. the former is early Miocene and the latter late Miocene.

• 터널과지하공간
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• 제10권2호
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• pp.165-172
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• 2000

이방성 암반의 역학적 거동은 해당 암반의 이방성 각도에 따라 다양한 거동을 하게 되므로 터널이나 지하구조물들이 이방성 암반 내에 위치하는 경우, 이러한 특성을 고려한 설계 및 시공이 이루어져야 할 것이다. 따라서 본 연구에서는 먼저, 실내시험을 통하여 편마구조에 대한 역학적 특성을 규명하고 실내시험으로부터 구한 강도특성들을 이용하여 시험편 모델에 대한 유한차분해석을 수행하였으며, 시험편의 파괴메커니즘에 대한 수치해석적 분석을 수행하였다. 본 연구의 결과를 요약하면, 1)비교적 경암에 속하는 화강편마암임에도 불구하고, 퇴적층리나 불연속면을 가진 이방성 모델의 시험결과와 동일하게 편마구조의 각도변화에 따라 파괴강도의 경향을 뚜렷하게 구분할 수 있었으며, 전단강도시험을 제외하고 일반적으로 $\beta$:60$^{\circ}$에서 가장 적은 강도치를 나타내었다. 2) 횡등방성 모델을 이용하여 시험편에 대한 유한차분해석을 수행한 결과, 편마구조의 각도에 따라 응력분포 및 변형특성이 변화함을 알 수 있었다.

• 터널과지하공간
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• 제26권2호
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• pp.100-109
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• 2016

이 연구에서는 횡등방성 암석파괴함수의 개발에 활용할 수 있는 3가지 강도정수 공간분포함수를 제안하였다. 제안된 분포함수는 편구(oblate spheroid)분포함수, 지수분포함수, 강도정수텐서 방향투영함수이며 모두 2개의 모델파라미터로 정의된다. 제안된 분포함수들을 점착력과 마찰각의 공간분포함수로 활용하여 횡등방성 Mohr-Coulomb 파괴함수를 유도한 후 이를 활용하여 수치삼축시험을 모사하였다. 연약면의 경사각과 구속압의 변화에 따른 파괴축응력 변화 및 파괴면 방향 변화를 계산한 결과 3개의 분포함수을 적용한 경우 모두 실제 실험에서 관찰되는 이방성 파괴특성을 재현하고 있음을 확인하였다. 3개의 분포함수 중 강도정수텐서 방향투영함수를 채용한 경우가 가장 큰 파괴축강도를 계산하였으며 지수분포함수, 편구분포함수 순으로 낮은 파괴축강도 값을 예측하였다.

• Journal of Biosystems Engineering
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• 제35권3호
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• pp.163-168
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• 2010

With income growth and "well-being" trends, sales of corn has been increased recently. Corns are processed at processing facilities on the main production site. Corn processing steps include removing bract, steaming, vacuum packing, and storing. To replace manual corn bract removing, some bract removing machines were imported and used. However, the machines were abandoned shortly, because of high damaging ratio of corns. In this research, factors of successful bract removing was studied with rotating rollers and air-injection nozzles to develop corn bract removing system. The test device was composed of a cylindrical roller, an air spray nozzle, a regulator, and a motor. Designing factors were roller type, diameter of air spraying nozzle, spraying angle, and spraying pressure. The measured factors were bract removing rate and damaging rate. It was found that optimum cylindrical roller surface shape was cylindrical roller and linear grove roller. This roller shape produced lowest damaging rate. Test results of the efficacy of preprocessing showed that the air spraying after preprocessing produced highest performance. The rotational speed and inclination of the roller didn't affect the bract removing performance. Optimum injection angle of the air jet nozzle was $70^{\circ}$. To increase bract removing rate and to reduce corn damage, required injection pressure and injection nozzle diameter were decided to less than 0.4 MPa and 2.5 mm, respectively. More than 3 times of nozzle passing produced good bract removing performance and there were no significant difference between the number of passing times.