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김태훈(Kim Tae-Hwoon),박준홍(Park Jun-Hong),이송(Lee song) 한국철도학회 2002 한국철도학회 학술발표대회논문집 Vol.- No.-
In this research problems of recent design methods and their improvement for SIP in domestic areas were studied by using the characteristics of load-settlement curves and bearing capacity from field loading tests. Elastic and plastic settlement for total settlement in each loading step conducted domestic areas had a tendency. From these tendency and bearing capacity determined by loading tests we can ascertain that empirical chart can be assistant tool in SIP design. It shows that SIP design using N-value in domestic area with soil condition of granite type results in very conservative bearing capacity, to be opposed in soil with unprofitable geological condition the design can be insecure. Also, we can ascertain that Meyerhof"s bearing capacity used modified N-value on tip part of pile is more applicable than recent design method where tip bearing capacity is 20NAp N-value limited to 50. These results show that modified design method can be more economic than before because of using pile"s bearing capacity to tolerable load of pile material.
김태훈 ( Tae Hoon Kim ),명승재 ( Seung Jae Myung ),이영미 ( Young Mi Lee ),장혜숙 ( Hye Sook Chang ),송혜경 ( Hye Kyoung Song ),이진혁 ( Jin Hyug Lee ),정훈용 ( Hwoon Yong Jung ),양석균 ( Seuk Kyun Yang ),홍원선 ( Woon Sun Hong 대한소화기기능성질환·운동학회 2002 Journal of Neurogastroenterology and Motility (JNM Vol.8 No.2
Chronic intestinal pseudo-obstruction syndrome (CIPS) is a rare clinical condition in which impaired intestinal propulsion causes recurrent symptoms of bowel obstruction in the absence of mechanical obstruction. CIPS can be present as either primary or secondary although the latter is rare in children compared with adults. The primary abnormality consists of a degeneration of either the muscularis propria (visceral myopathy), or the myenteric plexus (visceral neuropathy). A 19 year old woman was recently admitted with recurrent abdominal distension and diarrhea. An abdominal plain X-ray revealed a marked dilated stomach and duodenum with some air-fluid levels. A small bowel series showed a diffusely dilated small bowel with multifocal angulation and spiculation. Computed tomograpy also revealed a dilated small bowel and distal ileal wall thickening. The patient was treated by duodenojejunostomy and ileal resection. Histologically the intestine showed thinning of the proper muscle layer with degeneration of smooth muscle cells replaced by fibrosis. Based on the specific histopathologic finding, in addition to the clinical history, physical finding and radiological evaluation, a diagnosis of sporadic visceral myopathy was rendered. The patient was treated through total parenteral nutrition with neostigmine, prokinetics, octreotide, and erythromycin postoperatively. However, she underwent ileostomy due to poor response from these therapies. After ileostomy, she improved without a recurrence of severe symptoms.(Korean Jour nal of Gastr ointestinal Motility 2002;8:202-207)
수정 Cam-clay 이론을 이용한 점토의 비배수 강도 예측에 관한 연구
이송 ( Lee¸ Song ),이규환 ( Lee¸ Kyu-hwan ),김태훈 ( Kim¸ Tae-hwoon ) 한국구조물진단유지관리공학회 2002 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.6 No.2
국내 지역에서 대부분의 자연 연약점토는 약간 또는 매우 과압밀된 상태를 갖고 있다. 이러한 연약한 지반에 제방을 건설하기 위해서는 지반의 지지력이 결정되어야 하며, 응력이력에 따른 비배수 전단강도는 단계하중재하시 재방의 단계성토고와 안정성을 분석함에 매우 중요하게 하다. 이러한 점에서 한계상태이론의 Cam-clay 이론은 정규압밀과 과압밀된 점토지반의 비배 수 전단강도를 예측함에 있어 합리적인 결과를 주며, 비등방조건에서 비배수 전단강도의 예측 은 실내삼축시험과 잘일치하고 있다. 따라서, 본 논문에서는 MCCM 이론의 적용성을 국내 저소성 실트질 점토를 블록 샘플링하여 실내 등방 및 비등방 시험을 실시하여 검증하였으며, 과거 여러 지역에서 연구된 결과들과 비교하여 재분석하였다.
실트질 점토지반의 수정 Cam-clay 모델 적용성에 관한 연구
이송(Lee Song),강대원(Kang Dae-Won),김태훈(Kim Tae-Hwoon) 한국구조물진단유지관리학회 2003 한국구조물진단학회 학술발표회논문집 Vol.- No.-
In this paper, using the critical state theory the application of prediction of undrained shear strength and pore water pressure in anisotropic condition was evaluated from triaxial tests(CIU,CAU) and numerical analysis by FEM. Also, low plastic clays showing dilatancy behavior in shearing process were evaluated by laboratory tests and FEM which MCCM was used. As considering test results and numerical analysis, in both isotropic and anisotropic conditions the prediction of undrained strength of low plastic clays were well coincided with the results of laboratory triaxial compression tests. However in anisotropic condition the generation of porewater pressure trended to be overestimated during undrained shearing. It is thought that this results can generate the errors in prediction of stress path of field sites during loading such as construction of embankment on soft clays because that the field is applied to anisotropic condition during loading
실트질 점토지반의 수정 Cam-clay 모델 적용성에 관한 연구
이송 ( Lee Song ),강대원 ( Kang Dae-won ),김태훈 ( Kim Tae-hwoon ) 한국구조물진단유지관리공학회 2003 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.7 No.1
In this paper, using the critical state theory the application of prediction of undrained shear strength and pore water pressure in anisotropic condition was evaluated from triaxial tests(CIU, CAU) and numerical analysis by FEM. Also, low plastic clays showing dilatancy behavior in shearing process were evaluated by laboratory tests and FEM which MCCM was used. As considering test results and numerical analysis, in both isotropic and anisotropic conditions the prediction of undrained strength of low plastic clays were well coincided with the results of laboratory triaxial compression tests. However in anisotropic condition the generation of porewater pressure trended to be overestimated during undrained shearing. It is thought that this results can generate the errors in prediction of stress path of field sites during loading such as construction of embankment on soft clays because that the field is applied to anisotropic condition during loading.
골반저 근실조 환자의 직장항문내압검사에 따른 분류와 그 임상적 의의
정성희 ( Sung Hee Jung ),명승재 ( Seung Jae Myung ),양석균 ( Suk Kyun Yang ),정훈용 ( Hwoon Yong Jung ),김대현 ( Dae Hyun Kim ),김태훈 ( Tae Hun Kim ),장혜숙 ( Hye Sook Chang ),윤인자 ( In Ja Yoon ),권오련 ( Oh Ryoun Kwon ),홍원선 대한소화기학회 2003 대한소화기학회지 Vol.41 No.6
Background/Aims: The pathophysiology of pelvic floor dyssynergia (PFD) is unclear and heterogenous. The PFD patient could be classified according to several manometric patterns. However, its clinical significance is not known. The aims of this study were to classify PFD patients according to manometric patterns and to evaluate its clinical meaning including response to biofeedback therapy. Methods: Seventy patients (M:F 21:49, mean age 51±18) with PFD who fulfilled Rome criteria were examined with anorectal manometry. These patients were classified into 4 groups according to manometric patterns. The types were defined as follows: Type 1, adequate propulsive force with paradoxical anal contraction (n=49); type II, inadequate propulsive force with inappropriate anal contraction (n=3); type III, adequate propulsive force with failure to relax (n=13); type IV, inadequate propulsive force with failure to relax (n=5). We compared the clinical findings, parameters of manometry, and responses to biofeedback therapy of the 4 groups. Results: Clinical findings including subjective symptoms were not different among the 4 groups. On anorectal manometry, squeezing pressure was low in type II and type IV compared to type I and type III (p<0.05). Only forty patients underwent biofeedback therapy, and there was no difference in the biofeedback response rate among the 4 groups. Conclusions: Pelvic floor dyssynergia could be classified into four groups according to manometric patterns. However, the significance of this classification system is dubious because clinical features including responses to biofeedback therapy are not different among groups. (Korean J Gastroenterol 2003;41:456-464)