• Proceedings of the KSRS Conference
• /
• 2008.03a
• /
• pp.148-152
• /
• 2008

뉴올리언스는 미시시피 강 하구에 위치하였으며 지난 2005년 허리케인 카트리나에 의해 큰 침수 피해를 입은 지역이다. 이 도시는 신생대 지층에 자리하고 있어 미고결층의 다짐작용 및 단층작용으로 최대 29mm 정도의 연간 침하율을 보여 왔다. 뉴올리언스의 계속된 침하작용은 평균해수면보다 낮은 지역에 위치한 도시의 침수위험성을 가중시키고 있어 현재 이에 관한 많은 연구가 진행되고 있다. SAR영상을 이용한 차분간섭기법(DInSAR, Differential Interferometry of SAR)은 지반침하, 지진, 화산활동 등과 같이 수십 km$^2$에 걸쳐 발생하는 지표변위를 수cm-수mm의 정밀도로 관측 가능한 기술이다. 이 연구에서는 차분간섭기법을 이용하여 2005년 2월부터 2007년 2월까지 촬영된 21개의 RADARSAT-1 Fine beam mode(F5) 영상으로부터 25개의 차분간섭영상(DInSAR Interferogram)을 생성하였다. 또한 차분간섭도의 spatial decorrelation을 극복하고 시간에 따른 LOS 방향의 변위를 관측하기 위해 분석 알고리즘으로는 보완된 SBAS(small baseline subset)기법을 이용하였으며, 이 기법을 이용하여 대기의 영향 및 노이즈를 제거한 결과를 얻을 수 있었다. 우리는 LOS방향의 2차원 변위분포 맵을 작성하였으며, 그 결과 전체적인 침하율은 크지 않지만, 도시의 서쪽지점에서 나타나는 상대적으로 큰 -1.49cm/yr의 변위 값과 동쪽 지점에서 0.33cm/yr의 변위 값을 관측하였다. 이 같은 결과는 앞으로의 연구에서 실측 데이터 및 동일기간의 다른 SAR영상자료의 연구를 통해 보완해 나갈 것이다.

• Journal of Veterinary Clinics
• /
• v.27 no.4
• /
• pp.494-496
• /
• 2010

Chordoma was described in the tail masses of two ferrets. Tail masses were surgically removed and submitted for diagnosis. On histopathology, the masses from both ferrets were almost similar each other. The mass was well-demarcated and composed of lobules or sheets of neoplastic cells. The neoplastic cells were round to polygonal with distinct cell border and contained marginally located round nucleus. The cytoplasm of neoplastic cells was highly vacuolated. Immunohistochemically, the neoplastic cells were positive to cytokerain, vimentin, and S-100. Based on these results, both cases were diagnosed as chordoma in ferrets. Recurrence was not noted since surgery.

• Journal of the Korean Home Economics Association
• /
• v.41 no.4
• /
• pp.111-126
• /
• 2003

The purpose of this study was to investigate the clothing consumption pattern and satisfaction of the university students. 509 subjects were surveyed during the period of 2002, for statistical analysis, t-test, ANOVA(LSD), X²-test were used by SPSSWIN program. The results of this study were following; Number of clothing showed significant difference according to sex, income, and major Female students had more clothes than male students, but female student was not satisfied with thier number of clothing. University students spend the money below one hundred thousandwon on the purchase of clothing and they depend upon their parents for the cost. Their resources of fashion information are display of shop. Clothing consumption pattern showed significant difference according to sex and female students purchased on sale more frequently than male students. The needs of university students for formal wear was high. The reason for not wearing the clothes they have showed significant difference according sex, male students din't wear their clothes for ragging or unsuitableness of size but female students din't wear because thier clothes were old fashion or they lose interests in thier clothes. The tendency to have ethetic, easycare and high quality clothing of female student was stronger than that of male students. It is necessory business develop high quality formal wear at a low price, made in practical textiles and activative designed skirts for university students.

• Journal of Veterinary Clinics
• /
• v.27 no.4
• /
• pp.488-490
• /
• 2010

Lymphangiosarcoma was described in a 2-year-old male Miniature Poodle. A 5 cm by 3 cm slightly elevated tan ventral abdominal mass was surgically removed with a wide margin and submitted for diagnosis. The mass has being grown rapidly during the last six months. On histopathology, the mass was composed of anastomosing channels or empty spaces which were free of red blood cells and lined by flat to plump pleomorphic neoplastic cells. The neoplastic channels or spaces were invasive into the surrounding fat and muscle tissues. Mild perivascular lymphocytic infiltration was also noted. Immunohistochemically, the neoplastic cells were positive to vimentin and Factor VIII. Based on histopathology and immunohistochemistry, the tumor was diagnosed as lymphangiosarcoma. Recurrence or metastasis was not noted so far after surgery.

• Journal of Veterinary Clinics
• /
• v.27 no.4
• /
• pp.491-493
• /
• 2010

Granular cell tumor was described in a 7-year-old male Miniature Pinscher. Sublingual mass was surgically removed and submitted for diagnosis. The mass was about 1.8 cm in diameter, firm, tan, and ulcerated. On histopathology, the mass was unencapsulated and infiltrated adjacent tissue and consisted of nest or sheet of round to polygonal, and occasional spindle-shaped cells. The neoplastic cells contain large amount of eosinophilic granular materials in the cytoplasm. Immunohistochemically, the neoplastic cells were positive to neuron-specific enolase but were negative to S-100. The cytoplasmic eosinophilic granules were positive to PAS but were negative to PTAH methods. Based on these results, the mass was diagnosed as sublingual granular cell tumor. No recurrence or metastasis was noted so far since surgery.

• Journal of Veterinary Clinics
• /
• v.26 no.3
• /
• pp.279-281
• /
• 2009

Amyloid-producing odontogenic tumors were described in the gingival masses of two Maltese dogs. Gingival masses were surgically removed and submitted for diagnosis. On histopathology, the masses were poorly demarcated, infiltrative, and consisted of cuboidal and columnar epithelial cells with palisading pattern. Nodular deposit of congophilic amyloid-like material and mineralization were another features of the tumors. Immunohistochemically, the neoplasticd cells were positive to pancytokeratin and neuron-specific enolase but were negative to vimentin. The amorphous homogeneous eosinophilic materials were positive to Congo red stain and showed apple-green color under the polarized microscope. Based on these results, both cases were diagnosed as amyloid-producing odontogenic tumors in dogs.

• Journal of Korean Association for Spatial Structures
• /
• v.11 no.4
• /
• pp.101-108
• /
• 2011

Glass Reinforced Plastic(GRP) shows very high strength, comparing to the lightness of material. And the effect of transparency or semitransparency can be obtained by this material. However, due to the hand laminating for the GRP, the material properties can not be credible. Thus, the material test of GRP must be performed before the structural design. In this paper, material tests were performed for the design of the artistic column with 30m high and 4mm thickness. And the results of tests could be compared with DIN to evaluate the material properties for the application on the column.

• Journal of Ocean Engineering and Technology
• /
• v.22 no.2
• /
• pp.34-41
• /
• 2008

As a basic study for developing a forecasting/estimating system that predicts water quality changes when Deep Sea Water (DSW) drains to the ocean after using it, this study was carried out as follows: 1) numerical simulation of the present state at DSW developing region in the East sea using SWEM, 2) numerical prediction of water quality changes by effluent DSW, 3) analysis of influence degree 'With defined DEI (DSW effect index) at F station. On the whole, when DSW drained to the ocean, Chl-a, COD and water-temperature were decreased and DIN, DIP and DO were increased by effluent DSW, and Salinity was steady. According to analysis of influence degree, the influence degree of DIN was the highest and it was high in order of Chl-a, COD, Water-temperature, DO, DIP and Salinity. The influence degree classified by DSW effluent position was predicted that suiface outflow was lower than bottom outflow. Ad When DSW discharge increased 10 times, the influence degree increased about $5{\sim}14$ times.

• Korean Journal of Remote Sensing
• /
• v.23 no.4
• /
• pp.237-245
• /
• 2007

GB-SAR (Ground-Based Synthetic Aperture Radar) system is an imaging radar that obtains high resolution 2-D image through a synthetic aperture effect from the accurate linear-motion control of antenna on the ground. The highly versatile system configurations and accurate repeatability of GB-SAR operation allow one to accurately monitor the stability of surface scatterers with millimeter accuracy by SAR interferometry. In this paper we introduce the development of a GB-SAR system and show the possibilities of SAR polarimetry and interferometry such as DInSAR, Cross-Track InSAR, Delta-f InSAR, and PSInSAR.

• Elastomers and Composites
• /
• v.59 no.1
• /
• pp.34-41
• /
• 2024

In this study, the effects of the type and content of silica on the mechanical and tear properties of chloroprene rubber (CR), which is mainly used as a jacket material for mining cables, were studied. The crosslinking density (ΔM) and reinforcing factor (α_f) defined using cure characteristics increased with increasing silica content, whereas the cure rate decreased. The hardness, tensile strength, and modulus of the CR compounds increased depending on the silica content and structural development. The reinforcing behavior of the silica-filled CR compounds according to the silica type and content showed the best fit with the Thomas equation of the predictive model. Tear strength was evaluated using two standard test methods, ASTM D470 and DIN VDE 0472-613, and the results were compared. The tear strength increased as the silica content increased, regardless of the test method, and the different tear strengths obtained by the two standard test methods showed a linear relationship with each other, indicating a high correlation.