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Nationwide Estimation of Eligibility for Endovascular Thrombectomy Based on the DAWN Trial
Keon-Joo Lee,Beom Joon Kim,김동억,Wi-Sun Ryu,Moon-Ku Han,Joon-Tae Kim,Kang-Ho Choi,Ki-Hyun Cho,Jae-Kwan Cha,Dae Hyun Kim,Hyun-Wook Nah,Jong-Moo Park,Kyusik Kang,Soo Joo Lee,Jae Guk Kim,오미선,Kyung-Ho Yu,By 대한뇌졸중학회 2018 Journal of stroke Vol.20 No.2
Patterning of Diamond Micro-Columns
Cho, Hun-Suk,Baik, Young-Joon,Chung, Bo-Keon,Lee, Ju-Yong,Jeon, D.,So, Dae-Hwa The Korean Ceramic Society 1997 The Korean journal of ceramics Vol.3 No.1
We have fabricated a patterned diamond field emitter on a silicon substrate. Fine diamond particles were planted on a silicon wafer using conventional scratch method. A silicon oxide film was deposited on the substrate seeded with diamond powder. An array of holes was patterned on the silicon oxide film using VLSI processing technology. Diamond grains were grown using a microwave plasma-assisted chemical vapor deposition. Because diamond could not grow on the silicon oxide barrier, diamond grains filled only the patterned holes in the silicon oxide film, resulting in an array of diamond tips.
Keon-Cheol Lee,조인래,Jong Gu Kim,Sung Yong Cho,Joon Sung Jeon 대한남성과학회 2011 The World Journal of Men's Health Vol.29 No.3
Purpose: We compared the efficacy and safety profiles of dose increase, traditional combination methods, and combining different alpha blockers in hypertensive males with lower urinary tract symptom (LUTS) refractory to an initial dose of 4 mg doxazosin. Materials and Methods: Between 2000 and 2005, 374 male patients with LUTS and hypertension unresponsive to 4 weeks of 4 mg doxazosin were enrolled. The subjects were randomly classified into 3 groups, 8 mg/day of doxazosin (D group), 4 mg of doxazosin plus 0.2 mg/day of tamsulosin (DT group), and 4 mg doxazosin plus 5 mg/day finasteride (DF group). Patients were evaluated based on their International Prostate Symptom Score (IPSS), quality of life (QOL), uroflowmetry and blood pressure (BP) and adverse events (AEs) at the baseline and 3 and 12 months after treatment. Results: The 269 patients (71.9%) were followed for at least 1 year (D group n=84, DT group n=115, and DF group n=70). The clinical parameters before and after initial 4 mg/day doxazosin were not different among the 3 groups. IPSS improvement after 3 months and maximal flow rate (Qmax) improvement after 3 and 12 months were significantly higher in the D and DT groups than the DF group (p<0.05). Sitting systolic and diastolic BP of the D group decreased larger than those of the other 2 groups (p<0.05). At least one of the AEs was reported by 29.0%, 19.3%, and 17.3% of patients in the D, DT, and DF groups, respectively. In particular, vasodilatory AEs of the D group (28.2%) were higher than those of other groups (p<0.05), and sexual function AEs of the DF group (10.9%) were higher than those of other groups (p<0.05). Conclusions: Doxazosin 4 mg plus tamsulosin 0.2 mg has comparable efficacy but less vasodilatory AEs than doxazosin 8 mg, and has superior efficacy to but comparable vasodilatory AEs to 4 mg doxazosin plus 5 mg finasteride in hypertensive male LUTS patients.
Predictive Value of Pulse Pressure in Acute Ischemic Stroke for Future Major Vascular Events
Lee, Keon-Joo,Kim, Beom Joon,Han, Moon-Ku,Kim, Joon-Tae,Cho, Ki-Hyun,Shin, Dong-Ick,Yeo, Min-Ju,Cha, Jae-Kwan,Kim, Dae-Hyun,Nah, Hyun-Wook,Kim, Dong-Eog,Ryu, Wi-Sun,Park, Jong-Moo,Kang, Kyusik,Lee, So Ovid Technologies Wolters Kluwer -American Heart A 2018 Stroke Vol.49 No.1
<P>Conclusions-Our study shows that PP when measured in the acute period of ischemic stroke has nonlinear J-shaped relationships with major vascular events and stroke recurrence, and may have a stronger predictive power than other commonly used BP parameters.</P>
Lee Keon-Joo,Shin Dong Woo,Park Hong-Kyun,Kim Beom Joon,박종무,Kang Kyusik,Park Tai Hwan,Lee Kyung Bok,Hong Keun-Sik,Cho Yong-Jin,Kim Dong-Eog,Ryu Wi-Sun,Lee Byung-Chul,Yu Kyung-Ho,오미선,Lee Soo Joo,Kim Ja 대한의학회 2022 Journal of Korean medical science Vol.37 No.33
This study aimed to present the prognosis after minor acute ischemic stroke (AIS) or transient ischemic attack (TIA), using a definition of subsequent stroke in accordance with recent clinical trials. In total, 9,506 patients with minor AIS (National Institutes of Health Stroke Scale ≤ 5) or high-risk TIA (acute lesions or ≥ 50% cerebral artery steno-occlusion) admitted between November 2010 and October 2013 were included. The primary outcome was the composite of stroke (progression of initial event or a subsequent event) and all-cause mortality. The cumulative incidence of stroke or death was 11.2% at 1 month, 13.3% at 3 months and 16.7% at 1 year. Incidence rate of stroke or death in the first month was 12.5 per 100 person-months: highest in patients with large artery atherosclerosis (17.0). The risk of subsequent events shortly after a minor AIS or high-risk TIA was substantial, particularly in patients with large artery atherosclerosis.
Design, Implementation and Navigation Test of Manta-type Unmanned Underwater Vehicle
Kim, Joon-Young,Ko, Sung-Hyub,Cho, So-Hyung,Lee, Seung-Keon,Sohn, Kyoung-Ho Korean Society of Ocean Engineers 2011 International journal of ocean system engineering Vol.1 No.4
This paper describes the mathematical modeling, control algorithm, system design, hardware implementation and experimental test of a Manta-type Unmanned Underwater Vehicle (MUUV). The vehicle has one thruster for longitudinal propulsion, one rudder for heading angle control and two elevators for depth control. It is equipped with a pressure sensor for measuring water depth and Doppler Velocity Log for measuring position and angle. The vehicle is controlled by an on-board PC, which runs with the Windows XP operating system. The dynamic model of 6DOF is derived including the hydrodynamic forces and moments acting on the vehicle, while the hydrodynamic coefficients related to the forces and moments are obtained from experiments or estimated numerically. We also utilized the values obtained from PMM (Planar Motion Mechanism) tests found in the previous publications for numerical simulations. Various controllers such as PID, Sliding mode, Fuzzy and $H{\infty}$ are designed for depth and heading angle control in order to compare the performance of each controller based on simulation. In addition, experimental tests are carried out in a towing tank for depth keeping and heading angle tracking.