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Reflection Characteristics of Eco Block on Seabed
Jeong-Seok Kim,Joong-Woo Lee,Seok-Jin Kang,Yong-Hun Lee 한국항해항만학회 2014 한국항해항만학회지 Vol.38 No.4
In order to protect coastal facilities mainly from wave and current actions, the self-locking eco blocks constituting elements of protecting shore structures against scouring were designed. These blocks are adapted to the sloping bottom, coastal dunes, and submerged coastal pipelines, counteracting the destructive and erosive impulse action. A series of laboratory experiments has been conducted to investigate the reflection of water waves over and against a train of protruded or submerged shore structures and compare the reflecting capabilities of incident waves including wave forces. In this study the hydraulic model experiment was conducted to identify the performance of newly designed water affinity eco blocks to keep the coast slope and bottom mound from scouring by reduction of the wave reflection and to convince stability of the block placement. Revised design of each block element was also tested for field conditions. From the result of experiments, the field applicability of the developed blocks and placement was discussed afterward.
정석후 ( Seok Hu Jeong ),오경용 ( Kyong Yong Oh ),신동수 ( Dong Su Shin ),최성한 ( Shung Han Choi ),정을식 ( Eul Sik Jung ),박진선 ( Jin Sun Park ),나선영 ( Sun Young Na ),성지윤 ( Ji Yoon Sung ),정지용 ( Ji Yong Jung ),김세중 ( S 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.4
Kaposi`s sarcoma (KS) is an unusual multifocal neoplasm of vascular endothelial cell origin. The trunk, arms, head, and neck are the most common sites. It is common in men and has four distinct variants: classic, Africa-endemic, immunosuppressive drug-associated, and acquired immunodeficiency syndromeassociated KS. KS appears to develop immunosuppressed patients, but is uncommon in patients on dialysis. A 79-year-old man on hemodialysis for 2 months presented with pruritus over the entire body and multiple, discrete, variable-sized, dark blue papulonodules (papuloplaques, maculopapules) on the left arm and shoulder. A biopsy specimen form the left arm showed spindle cells with slit-like spaces and extravasated red blood cells. The specimen was positive for CD 34 antigen, and human herpesvirus 8 was detected. We report a case of KS that occurred in a 79-year-old patient on hemodialysis.
3차원 전산화단층촬영 영상을 이용한 얼굴 연조직 두께 계측
정호걸,김기덕,한승호,신동원,허경석,이제범,박혁,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.37 No.1
Purpose : To evaluate accuracy and reliability of program to measure facial soft tissue thickness using 3D computed tomographic images by comparing with direct measurement. Materials and Methods : One cadaver was scanned with a Helical CT with 3 mm slice thickness and 3 mm/sec table speed. The acquired data was reconstructed with 1.5 mm reconstruction interval and the images were transferred to a personal computer. The facial soft tissue thickness were measured using a program developed newly in 3D image. For direct measurement, the cadaver was cut with a bone cutter and then a ruler was placed above the cut side, The procedure was followed by taking pictures of the facial soft tissues with a high-resolution digital camera. Then the measurements were done in the photographic images and repeated for ten times. A repeated measure analysis of variance was adopted to compare and analyze the measurements resulting from the two different methods. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant differences between the direct measurements and those using the 3D images (p>0.05). There were statistical differences in the measurements on 17 points but all the points except 2 points showed a mean difference of 0.5 mm or less. Conclusion : The developed software program to measure the facial soft tissue thickness using 3D images was so accurate that it allows to measure facial soft tissues thickness more easily in forensic science and anthropology. (Korean J Oral Maxillofac Radiol 2006; 36 : 49-54)
3차원 전산화단층촬영 영상을 이용한 안면 연조직 두께 계측의 임상적 유용성
정호걸,김기덕,한승호,허경석,이제범,박혁,최성호,김종관,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2
Purpose : To evaluate clinical usefulness of facial soft tissue thickness measurement using 3D computed tomographic images. Materials and Methods : One cadaver that had sound facial soft tissues was chosen for the study. The cadaver was scanned with a Helical CT under following scanning protocols about slice thickness and table speed; 3 mm and 3 mm/sec, 5 mm and 5 mm/sec, 7 mm and 7 mm/sec. The acquired data were reconstructed 1.5, 2.5, 3.5 mm reconstruction interval respectively and the images were transferred to a personal computer. Using a program developed to measure facial soft tissue thickness in 3D image, the facial soft tissue thickness was measured. After the ten-time repeation of the measurement for ten times, repeated measure analysis of variance (ANOVA) was adopted to compare and analyze the measurements using the three scanning protocols. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant intraobserver differences in the measurements of the facial soft tissue thickness using the three scanning protocols (p>0.05). There were no statistically significant differences between measurements in the 3 mm slice thickness and those in the 5 mm, 7 mm slice thickness (p>0.05). There were statistical differences in the 14 of the total 30 measured points in the 5 mm slice thickness and 22 in the 7mm slice thickness. Conclusion : The facial soft tissue thickness measurement using 3D images of 7 mm slice thickness is acceptable clinically, but those of 5 mm slice thickness is recommended for the more accurate measurement.
정현주,조한선,나병주,정오영,이후석 대한신장학회 1999 Kidney Research and Clinical Practice Vol.18 No.4
Rhabdomyolysis is defined as skeletal muscle injury with release of muscle cell constituents into the plasma and may lead to acute renal failure secondary to myoglobinuria. The causes of rhabdomyolysis is diverse:alcohol abuse, primary muscle disease, disturbance of muscle metabolism, sustained seizure, infection, drugs, tox ins, trauma, severe exercise, CO intoxication etc. Rhabdomyolysis may cause acute derangement in electrolyte balance and death. It should be diagnosed earlier and managed properly. We experienced a 49 year-old woman developed acute renal failure and myoglobinuria after alcohol drinking. A kidney biopsy revealed acute interstitial nephritis. In the presence of otherwise unexplained acute renal failure in alcoholic patients, rhabdomyolysis should be considered in the differential diagnosis.