A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is
SUNG-TAEK LEE (M'20) is an assistant professor in the Department of Computer Science of Yongin University, Korea. ... SUNG-JIN KIM (M'20) received his Ph.D. degree from KAIST, Daejeon, Rep. of Korea, in 2019. ...doi:10.1109/access.2020.3021044 fatcat:fvx6qcz6djdnhaulveiaq45odq
Contact-type methods that are widely uses to evaluate the surface hardness of materials include the indentation press and the rebound and scratch hardness methods and can be used to measured quantitatively the hardness of a materials surface. However, these contact hardness measurements are limited by specimen damage due to indentation and by the shape (curved shape) of the material. A disadvantage is that various measurement loads and methods are needed depending on the hardness of thedoi:10.3938/npsm.70.270 fatcat:lqfabbo7g5b6jh65imrargzjqm
more »... . When ultrasonic waves are incident at a specific angle (Rayleigh angle) on a liquid-solid interface, Rayleigh surface waves are generated, and a rapid decrease in reflectance, called the minimum reflection, occurs at the interface. The hardness of a material mainly depends on the change in the hardness of surface region, which can be evaluated from the propagation characteristics of a surface wave by using the minimum reflection phenomenon of ultrasonic waves. In these study, the propagation characteristics of a Rayleigh surface waves for hard specimens were evaluated by using the minimum reflection and the hard surface region was analyzed using modified perturbation theory. A non-contact hardness measurement method using the minimum reflection was proposed and the reliability of the proposed in this study, method was demonstrated by applications to standard hardness specimens.
The Journal of Bone and Joint Surgery
T he treatment of osteochondritis dissecans after Legg-Calvé-Perthes' disease has not been clearly determined. It may be either by simple observation or surgical removal of the osteochondral fragment. We studied the evolution of the lesion in 13 children and reviewed 92 hips reported in the literature. In our patients ten showed a tendency towards spontaneous healing, one required drilling + grafting to obtain fusion, and in two there was separation into the joint. These loose bodies were indoi:10.1302/0301-620x.84b7.13227 pmid:12358366 fatcat:bfhrp6dux5ag7al3v2umunsu44
more »... acetabular fossa and caused no symptoms. On reviewing the literature, we found only four cases of hips with loose bodies from osteochondritis dissecans. These were lying in the inferomedial capsule and were also asymptomatic. Treatment of osteochondritis dissecans after Legg-Calvé-Perthes' disease should therefore be conservative unless the fragment interferes with the mechanics of the hip.
Young Sook Lee for her help in PLD assays. ... ., 1992; Lee and Lee, 1996) . ... Detailed culture conditions and medium compositions were as described by Lee and Lee (1996) . ...doi:10.1104/pp.116.1.223 fatcat:yea57gqirnhdnl2x2glsqqq2ji
Bae Lee, MD, Sung Taek Jung, MD, and Dicky Mulyadi, MD Abstract: This study evaluated the clinical and radiographic results of 37 acetabular revisions using an acetabular roof reinforcement ring with ... The Journal of Arthroplasty Vol. 18 No. 6 2003 Acetabular Revision Using Acetabular Roof Reinforcement Ring with a Hook Taek Rim Yoon, MD, Sung Man Rowe, MD, Jae Yoon Chung, MD, Eun Kyoo Song, MD, Keun ...doi:10.1016/s0883-5403(03)00260-2 pmid:14513448 fatcat:diuvngw54rgkdjqv6cfqj7jkpa
Analysis of the Eddy Current Signal due to Defects on a Railway -Taek-Gyu Lee et al. Width estimation at many point. ... Analysis of the Eddy Current Signal due to Defects on a Railway -Taek-Gyu Lee et al. 363 Fig. 3. (Color online) Plus Point Sensor (a) Sensor form, (b) Sensor structure. ...doi:10.3938/npsm.69.361 fatcat:t372rjxmfrbtngyqdm2sovkbmy
doi:10.1038/ncomms3766 pmid:24216572 fatcat:smlrlmpyvne6zjma6aztgvqs5m
1 6 5 위 사구종양 1 예 이진성⋅최선택⋅이현욱⋅권병진⋅이지은⋅이시형 1 포항성모병원 내과,영남대학교 의과대학 내과학교실 1 AC a s eo f G a s t r i cG l o m u sT u m o r J i nS u n gL e e ,S u nT a e kC h o i ,Hy u nUkL e e ,By u n gJ i nKwo n , J iEu nL e e ,S iHy u n gL e e 1 De p a r t me n to fI n t e r n a lMe d i c i n e , P o h a n gS a i n tMa r y ' sHo s p i t a l ,P o h a n g ,K o r e a 1 De p a r t me n to fI n t e r n a lMe d i c i n e ,C o l l e g eo fMe d i c i n e , Y e u n g n a m Un i v e r s i t y ,Da e g u ,Ko r e a 1 )doi:10.12701/yujm.2011.28.2.165 fatcat:cji2vdrnozdsdk2rujejfy34b4
more »... ct-Ga s t r i cg l o mu st u mo ri sar a r eme s e n c h y ma lt u mo rt h a to r i g i n a t e sf r o m mo d i f i e ds mo o t h mu s c l ec e l l so ft h eg l o mu sb o d y .Gl o mu st u mo r sa r ec o mmo n l y o b s e r v e d i n p e r i p h e r a ls o f t t i s s u e ,s u c h a s d e r mi s o r s u b u n g a lr e g i o n ,b u t r a r e l y i n t h e g a s t r o i n t e s t i n a lt r a c t .A 3 9 -y e a r -o l dwo ma nwa sa d mi t t e dd u et oe p i g a s t r i cs o r e n e s s .Up p e rg a s t r o i n t e s t i n a le n d o s c o p y
Dissimilar metal welds (DMWs) are used to connect different metals together and is generally applied to the welding of stainless steel and carbon steel for the connections of reactor vessels to piping in nuclear power plants. Stainless steel is usually connected via an austenite weld, and carbon steel is bonded to the buttering layer at the interface with the weld. Because of the anisotropy and the complicated shapes of the granular crystals, welded metal parts of different kinds can cause beamdoi:10.3938/npsm.68.369 fatcat:bslqazy7a5dwvnd25jyojlzsoq
more »... distortion in a defect evaluation test using an ultrasonic technique, thereby causing the evaluation to be inaccurate. In this study, ultrasonic wave propagation simulations and ultrasonic tests were carried out in order to improve the reliability of ultrasonic inspections of DMW. 실제 형상반영 이종 금속 용접부의 초음파 거동 연구 이택규 · 김학준 · 송성진 성균관대학교 기계공학부, 수원 16419, 대한민국 권성덕 * 안동대학교 물리학과, 안동 36729, 대한민국 (2017년 12월 15일 받음, 2018년 1월 6일 게재 확정) 이종 금속 용접부 (dissimilar metal welds, DMW) 는 두 가지 이상의 금속을 혼합 사용한다. 일반적으로 원전에서의 원자로 용기와 배관의 연결을 위해 스테인리스강 (stainless steel) 과 탄소강 (carbon steel) 의 용접에 적용된다. 스테인리스강은 대개 오스테나이트계 용접부 (austenite weld) 와 연결되고 탄소강은 용접부와의 경계에 있는 버터링 (buttering) 층과 결합한다. 이종용접 금속부는 주로 이방성의 특성과 형상이 복잡한 조립 결정 입도 때문에 초음파 기술을 이용한 결함 평가 검사의 경우 빔 왜곡이 발생하며 부정확한 평가의 원인이 되기도 한다. 본 연구에서는 이종 금속 용접부의 초음파 결함 탐상의 신뢰도 향상을 위하여 용접부 방향성을 고려한 초음파 전파 전산모사 및 초음파 실험을 수행하여 용접부 내 초음파 거동을 확인하였다.
A stapled hemorrhoidopexy (SH) is widely used for treatment of patients with grades III and IV hemorrhoids. The SH is easy to perform, is associated with less pain and allows early return to normal activities. However, complications, whether severe or not, have been reported. Here, we present the case of a female patient with persistent bleeding after a SH. The bleeding was caused by the formation of granulation tissue at the stapler line, diagnosed with sigmoidoscopy, and successfully treateddoi:10.3393/ac.2016.32.3.120 pmid:27437395 pmcid:PMC4942528 fatcat:ucrtlp2ffzdkjl4tbhn5hri3om
more »... ia transanal excision (TAE) under spinal anesthesia. The biopsy showed inflammatory granulation tissue. After the TAE, her symptom was completely gone.
A large number of articles have documented that as population density of cities increases, car use declines and public transit use rises. These articles had a significant impact of promoting high-density compact urban development to mitigate traffic congestion. Another approach followed by other researchers used the urban scaling model to indicate that traffic congestion increases as population size of cities increases, thus generating a possible contradictory result. Therefore, this studydoi:10.3390/su13084280 fatcat:aljrfi7bgvdpnhssyr33c4bibe
more »... nes the role of both density and population size on traffic congestion in 164 global cities by the use of Stochastic Impacts by Regression on Population, Affluence and Technology model. We divide 164 cities into the two subgroups of 66 low density cities and 98 high density cities for analysis. The findings from the subgroups analysis indicated a clear-cut difference on the critical role of density in low-density cities and the exclusive role of population size in high-density cities. Furthermore, using threshold regression model, 164 cities are divided into the two regions of large and small population cities to determine population scale advantage of traffic congestion. Our findings highlight the importance of including analysis of subgroups based on density and/or population size in future studies of traffic congestion.
The purpose of this study was to find the factors predicting the neoplastic polyp of gallbladder and analyze the size criteria associated with malignancy. A total of 354 subjects with gallbladder polyps confirmed by tissue pathology were included for the analysis. The clinical and radiological features of the polyps were compared between the two groups (neoplastic vs. non-neoplastic) and in the three groups (non-neoplastic vs. adenoma vs. adenocarcinoma). The independent factors associated withpmid:19077501 fatcat:lg3qaaq5xzdw3fsz7v37hjwgbe
more »... malignancy were studied. Of 354 patients, non-neoplastic polyps were observed in 229 (64.7%) patents, adenoma in 85 (24.0%) and adenocarcinoma in 40 (11.3%). The mean diameter of non-neoplastic polyp, adenoma, and adenocarcinoma were 11.3+/-2.8 mm, 16.0+/-7.2 mm, and 27.0+/-8.9 mm, respectively. The mean age of patients with non-neoplastic polyp, adenoma, and adenocarcinoma were 44.8+/-11.3, 49.9+/-12.5, and 60.8+/-9.6, respectively. Age, size of polyp, number of polyp, presence of diabetes, and presence of symptom showed statistically significant difference between the neoplastic polyp and non-neoplastic polyp groups. But only age, size of polyp, number of polyp were statistically independent factors associated with neoplastic polyp (p<0.05). To predict the neoplastic polyp, sensitivity was 94.4%, but specificity was 18.3% on the basis of 10 mm criteria. whereas sensitivity and specificity was 76.0% and 55.5% on the 12 mm-criteria. On the basis of our analysis, the size of polyp is the most important factor to predict the malignancy. In the 10 mm criteria, sensitivity is satisfactory but specificity is very low. Therefore 10 mm size should not be considered to be the absolute size-criterion for surgery.
Optical fibers are essential within industrial fields related to semi-conductors, smart factories, communications, and medical devices. One of their most important uses is in sensors that exchange signals between mechanical facilities. However, optical fibers are insufficiently durable to remain functional for the lifetime of these facilities, and the longer they are in use; the more likely they are to malfunction due to degradation. Therefore, it is crucial to understand the degradationdoi:10.3938/npsm.72.252 fatcat:npta7puzenf33g5yrfezdujx6e
more »... eristics of optical fibers and set optimal replacement schedules. In this study, optical fibers that are typically used in wafer transportation sensors were thermally degraded to determine their lifespan. A testing module was designed to enable the ultrasonic testing of highly attenuated optical fibers, and the ultrasonic amplitude and time of flight were comprehensively evaluated using the through-transmission method of ultrasonic testing to understand the degradation characteristics of plastic optical fibers.
Sung and K. C. Chung, unpublished observation and manuscript in preparation. ...doi:10.1074/jbc.m503341200 pmid:15863497 fatcat:fk6hyba5krg7pd3diphzxe4rnm
Nodular lymphoid hyperplasia is a very rare benign disease and usually shows consolidation on chest X-ray with symptoms of pneumonia due to the proliferation of lymphoid cells in the lung parenchyma. It is common for patients to be diagnosed with pneumonia and treated with antibiotics, but patients often enter a cycle of repeated improvement, followed by aggravation of symptoms. At this point, surgical diagnostic tools are considered in order to differentiate between malignant disease anddoi:10.4046/trd.2010.69.3.212 fatcat:2spjevgi5zh63f4xn6n7ncqel4
more »... titial lung disease. Here, we report 2 cases of patients with nodular lymphoid hyperplasia and review the associated references.
« Previous Showing results 1 — 15 out of 2,480 results