A Discrete Optimization Process for the Design of Horizontal Girders of Rising Sector Gate Using PIAnO

Kabsoo Lee,Hyuckmoon Gil,Xiaozhe Lu,Young-Doo Kwon 한국강구조학회 2014 International Journal of Steel Structures Vol.14 No.3

Many small dams have recently been constructed on several major rivers in the Republic of Korea to utilize these waterresources and control water flows. One such water body is the Gangjeong reservoir in the Nakdong River; a rising sector gatewas mounted on this reservoir. The finite element analysis (FEA) confirmed the empirical design of the gate to be safe withminor modifications. However, the positions of the horizontal girders are critical in the design of a gate, and it is must bedetermined by a trial-and-error process. To find the optimal solution for the positions and thicknesses of horizontal girders ina rising sector gate, this paper proposed a new procedure using the commercial optimization package, PIAnO, as well as Pro-Engineer, Hypermesh, and Abaqus. The optimal positions of the horizontal girders are selected from 9 predefined positions. A special technique was developed and applied to change the discrete position set, such as (1, 4, 8) to a continuousdimensionless variable. For this, a FORTRAN program was written to convert the dimensionless variable to a set of positionnumbers, and vice versa.

Simulation and Design of a Multilayer Piezoelectric Actuator

Lee, Kabsoo,Yoo, Juhyun,Lee, Sangho,Hong, Jaeil The Korean Institute of Electrical and Electronic 2017 Transactions on Electrical and Electronic Material Vol.18 No.3

In this study, two- and three-layer ceramic piezoelectric actuators were designed and simulated according to SUS316 thickness, actuator width, and mass using ATILA software in order to develop a piezoelectric actuator for haptic application. Numerical modelling based on the finite element method was performed to find the resonance frequencies and modal shapes of the actuator. The resonance frequency was affected by the thickness of the SUS316 plate and mass. On the other hand, the width of the actuator did not have a significant impact. Maximum displacements were generated at the center of a haptic three-layer ceramic piezoelectric actuator. The two-layer ceramic piezoelectric actuator with a mass of 2.6 g was suitable as $16.28{\mu}m$ at 265 Hz for haptic sensation application.

적층 압전액츄에이터 소자의 온도에 따른 전기적 특성

이갑수(Kabsoo Lee),이일하(Ilha Lee),류주현(Juhyun Yoo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10

In this paper, multilayer piezoelectric actuator was fabricated in order to develop ultrasonic linear motor. Multilayer actuator showed a high density of 7.78[g/㎤], a large effective electromechanical coupling factor(k<SUB>eff</SUB>) of 0.259, a high mechanical quality factor(Qm') of 1301, and high capacitance(c) of 19.32[㎋l Curie temperature was 343[℃]

Case 10: A 30-Year-Old Woman With Breast Mass and Family History of Cancer

Shin Kabsoo,Lee Jeongmin,Kang Jun,Yoo Tae-Kyung,Lee Jieun 대한의학회 2023 Journal of Korean medical science Vol.38 No.18

분극조건에 따른 무연 NaKNbO₃ 세라믹스의 압전 및 유전 특성

이상호(Sangho Lee),류주현(Juhyun Yeo),이갑수(kabsoo Lee) 대한전기학회 2005 대한전기학회 학술대회 논문집 Vol.2005 No.11

Association between absolute lymphocyte count and overall mortality in patients with surgically resected gastric cancer

( Se Jun Park ),( Jinsoo Lee ),( Hyunho Kim ),( Kabsoo Shin ),( Myungah Lee ),( Jae Myung Park ),( Myung-gyu Choi ),( Cho Hyun Park ),( Kyo Young Song ),( Han Hong Lee ),( In-ho Kim ) 대한내과학회 2021 The Korean Journal of Internal Medicine Vol.36 No.3

Background/Aims: Lymphocytes are an important component of the cell-mediated immune system. As lymphopenia is reportedly associated with poor prognoses in patients with various cancers, we investigated this notion in patients who underwent curative gastrectomy. Methods: We retrospectively analyzed the association between absolute lymphocyte count (ALC) and prognosis in patients with stage I-III gastric cancer who underwent curative surgical resection. Ever lymphopenic patients were defined as those with ALCs < 1,000/μL at any time post-diagnosis except within 30 days post-surgery. Adjusted multivariable regression models were used to evaluate the associations between lymphopenia and overall mortality, gastric cancer-specific mortality, and disease-free survival. Results: We investigated 1,222 patients diagnosed between January 2011 and December 2015. Fifty-six patients (4.6%) were lymphopenic at diagnosis and nearly one-quarter (24.8%) were ever lymphopenic with a mean minimum ALC of 640/ μL. Older age (odds ratio [OR], 1.02) and higher stage (stage III vs. I; OR, 3.01) were positively associated with ever lymphopenia. On multivariable analysis, ever lymphopenia predicted higher overall mortality (hazard ratio [HR], 1.83; p = 0.008), higher gastric cancer-specific mortality (HR, 1.58; p = 0.048), and shorter disease-free survival (HR, 1.83; p = 0.006). The 5-year gastric cancer-specific mortality rates for ever- and never lymphopenic patients were 10.9% and 3.7%, respectively; their 5-year cumulative recurrence rates were 15.1% and 4.6%, respectively. Conclusions: This study demonstrate that ever lymphopenia is independent prognostic factor for overall mortality and recurrence in patients with potentially curable gastric cancer; hence, ALCs may be a biomarker for predicting the prognoses of patients with stage I-III gastric cancer who had curative gastrectomy.

S-606 Venous thromboembolic event as prognostic clinical marker in pancreatic and biliary tract cancer

( Kabsoo Shin ),( Myung Ah Lee ) 대한내과학회 2016 대한내과학회 추계학술대회 Vol.2016 No.1

Background: Venous thromboembolic event (VTE) is common event in advanced cancer patient, presenting deep vein thrombosis (DVT) or pulmonary thromboembolism (PTE). We analyzed the clinical characteristics of VTE in pancreatic and biliary tract cancer to identify the clinical significance. Methods: Seventy nine patients who had thromboembolic event with advanced pancreatic cancer or biliary tract cancer between Sep, 2012 and Jul, 2016 at Seoul St. Mary’s hospital, Catholic University were retrospectively reviewed. All patients were treated low molecular weight heparin and some patients were treated with IVC filter or thrombectomy. We investigated the correlation between the clinical course and the thromboembolic event, and the laboratory risk factors such as CBC profile. Results: Of the 79 patients, male were 40 (50.6%) and the median age was 65 years old (41-80). The pancreatic cancer was most common with 37 patients (46.8%), and the bile duct cancer was next with 28 patients (35.4%). In 43 patients (54.4%), thromboembolic event was incidentally in imaging study without symptoms. There was PTE only in 31 cases (39.2%), and combined thrombosis more than 2 site was found in 19 cases (24.1%). VTE developed during the treatment course in most cases (83.5%), but initial symptom in 10 cases (12.7%) or sign of recurrence after curative surgery (3.8%). Of the 55 patients with active chemotherapy, 45 patient showed progressive disease at the diagnosis of VTE. There was no correlation with WBC, Hemoglobin or platelet count. The median time from the diagnosis of VTE to survival in all patients was 11.9 weeks (6.2 - 17. 6weeks). In chemotherapy group, median time was 15.3 weeks but the patients with palliative care showed only 4 weeks of survival time. In subgroup analysis, pancreatic cancer showed worst survival with median 8.9 weeks, and gall bladder cancer had best survival with 22.9 weeks. . Conclusion In Pancreatic and biliary tract cancer patients, VTE can be poor prognostic sign in patients with active treatment, suggestive progressive disease, and the sign of short life expectancy, requiring hospice and terminal care.

진행성 담도암과 췌장암에서 혈전색전증의 임상적 예후인자로서의 의의

신갑수 ( Kabsoo Shin ),이명아 ( Myung Ah Lee ) 대한내과학회 2018 대한내과학회지 Vol.93 No.5

목적: 혈전색전증은 진행된 췌장암과 담도암 환자에서 흔하게 관찰되며, 다양한 부위의 혈관에 나타날 수 있다. 본 연구에서는 진행성 췌장암과 담도암 환자의 임상 경과에서 혈전색전증 진단의 임상적 의미가 무엇인지 알아보고자 하였으며, 특히 혈전색전증 이후 잔여 생존기간을 분석하여 불량한 예후인자로서의 가능성이 있는지 탐색하고자 하였다. 방법: 본 연구는 2012년 9월부터 2016년 7월 사이에 가톨릭대학교 서울 성모병원에서 췌장암, 담도암 또는 담낭암으로 치료받은 환자 중 혈전색전증이 진단된 환자를 대상으로 후향적 분석을 하였다. 연구에 포함된 환자 수는 79명이었으며, 이들의 임상양상의 특징를 분석하였고, 혈전색전증의 위험인자로 알려진 백혈구 수, 혈색소 및 혈소판에 따른 증상의 유무와 생존 기간의 차이를 관찰하였으며, 혈전색전증 진단 이후 잔여 생존기간을 질병의 알려진 중앙 생존값과 비교 하였다. 결과: 총 79명의 환자 중 40명 (50.6%)은 남자, 39명은 여자(49.4%)였으며, 연령의 중앙값은 65세였다. 43명(54.4%)의 환자는 혈전색전증 진단 당시 무증상이었으며, 폐혈전색전증은 31명(39.2%)에서 관찰되었고, 두 부위 이상에서 혈전색전증이 발견된 경우는 17명(21.5%)이었다. 51명의 항암 치료군 중에서는 45명이 진행성 병변을 보였다. 중앙 생존값은 모든 환자에서 11.9주였으며, 치료군에서는 15.3주, 치료를 받지 않는 군에서는 3.4주를 보였다. Dalteparin 투여군과 dalteparin 및 중재술을 동시에 시행한 군에서 생존에 유의한 차이가 관찰되지 않았다. 결론: 적극적 치료를 받고 있는 췌장암 및 담도암 환자에서 혈전색전증이 나타나는 경우 진행성 질환을 예측하며 잔여 생존기간이 짧으며 호스피스 완화 진료의 대상자임을 고려해야 하는 임상적 지표로서의 가능성이 있다. Background/Aims: Venous thromboembolic events (VTEs) are common events in patients with advanced cancer. We analyzed the clinical characteristics of VTEs in advanced pancreatic and biliary tract cancer to determine the clinical significance, especially in palliative settings. Methods: Seventy-nine patients with advanced pancreatic cancer or biliary tract cancer who had thromboembolic events were retrospectively reviewed. We investigated the correlation between clinical course and thromboembolic events, and the laboratory risk factors, such as complete blood count profile. Results: The 79 patients consisted of 40 men (50.6%) and 39 women (49.4%) with a median age of 65 years old (range: 41-80). Forty-three patients (54.4%), had thromboembolic events without any symptoms. Pulmonary thromboembolism occurred in only 31 cases (39.2%), and combined thrombosis at more than two sites occurred in 17 cases (21.5%). Of the 51 patients with active chemotherapy, 45 showed progressive disease. The median survival times were 11.9 weeks in all patients, 15.3 weeks in the treatment group, and 3.4 weeks in the palliative group. There was no difference in survival time between patients treated with dalteparin only and those treated with dalteparin combined with thrombolytic intervention. Conclusions: VTE can be poor prognostic indicator in pancreatic and biliary tract cacner patients, suggestive of progressive disease and a sign of short life expectancy, requiring hospice and terminal care. (Korean J Med 2018;93:457-463)

창조도시 볼로냐의 쇠퇴공장지역 재생 현지사례연구

이연숙(Lee, Yeunsook),윤혜경(Yoon, Hyegyung),소갑수(Soo, Kabsoo) 한국생태환경건축학회 2008 한국생태환경건축학회 논문집 Vol.8 No.3

Case 18: A 66-Year-Old Woman With Dizziness and Left Side Weakness

Shin Kabsoo,Mun Hye Won,Kim Seunghan,Park Ga Eun,Song Jin-Ho,Lee Jieun 대한의학회 2024 Journal of Korean medical science Vol.39 No.2