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( Junyoung Yeo ),( Subeen Lee ),( Hyun Jung Lee ),( Yoon Hee Lee ),( Gun Oh Chong ),( Dae Gy Hong ),( Yoon Soon Lee ) 대한산부인과학회 2020 대한산부인과학회 학술대회 Vol.106 No.-
Objective: This study aimed to compare the surgical outcomes between laparoscopic single port myomectomy (LSPM) and conventional laparoscopic myomectomy (C-LM) by using of a propensity score matching analysis. Methods: Retrospective data of 415 patients who underwent C-LM and 223 patients who underwent LSPM were analyzed. A propensity score matching analysis was performed to control selection bias using age, gravida, parity, body mass index, previous history of pelvic surgery, preoperative hemoglobin level, size, number of myomas, type of myoma, and myoma weights. One hundred and ninety-three patients were selected for each group. Results: The patients characteristics were well balanced between the groups after propensity score matching. Surgical outcomes of the matched LSPM group demonstrated shorter hospital stay (3 d [range, 3-4 d] vs 4 d [range, 3-4 d]; P=.000), shorter operation time (64 min [range, 52-95 min] vs 83 min [range, 64-110 min]; P=.000), and less blood loss (20 ml [range, 10-30 ml] vs 50 ml [range, 25-100 ml]; P=.000). There were no significant changes in hemoglobin drop (1.2 g/dL [range, 0.7-2 g/dL] vs 1.3 g/dL [range, 0.7-2.1 g/dL]; P=.822) and complication rate (3% vs 6 %; P=.134) in the matched LSPM group. Conclusion: Although it was difficult to compare the exact difference owing to the heterogeneity of the disease, the current long-term study demonstrated clinical outcomes of LSPM and C-LM after PS matching analysis, revealing that LSPM had the advantage of shorter hospital stays, shorter operation time, and less blood loss.
Highly Enhanced Performance of Network Channel Polysilicon Thin-Film Transistors
Lee, Hojoon,Lee, Junyoung,Baek, Sangwon,Jeong, Woong Hee,Lee, Yongsu,Yang, Taehoon,Lee, Jeong-Soo IEEE 2017 IEEE electron device letters Vol.38 No.2
<P>This letter presents the electrical characteristics of newly proposed network-channel low-temperature polysilicon channel (LTPS) thin-film transistors (TFTs). Due to effective reduction of grain boundary traps and enhanced gate controllability, the network-channel TFTs show better subthreshold slope, lower threshold voltage, and higher ON-OFF current ratio, compared with conventional planar devices. The extracted grain boundary trap density and the interface trap density are significantly reduced in the network-channel devices. In addition, the network-channel devices show higher immunity to hot-carrier stressing, which are confirmed from the low-frequency noise characteristics with various stressing time. These results suggest that the network-channel devices are very promising for next-generation LTPS TFT applications.</P>
MinSoo Byun,Dahyun Yi,JunHo Lee,YoungMin Choe,BoKyung Sohn,JunYoung Lee,HyoJung Choi,Hyewon Baek,YuKyeong Kim,YunSang Lee,ChulHo Sohn,Inhee MookJung,Murim Choi,YuJin Lee,DongWoo Lee,SeungHo Ryu,ShinGy 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.6
Objective-The Korean Brain Aging Study for the Early Diagnosis and Prediction of Alzheimer’s disease (KBASE) aimed to recruit 650 individuals, aged from 20 to 90 years, to search for new biomarkers of Alzheimer’s disease (AD) and to investigate how multi-faceted lifetime experiences and bodily changes contribute to the brain changes or brain pathologies related to the AD process. Methods-All participants received comprehensive clinical and neuropsychological evaluations, multi-modal brain imaging, including magnetic resonance imaging, magnetic resonance angiography, [11C]Pittsburgh compound B-positron emission tomography (PET), and [18F]fluorodeoxyglucose-PET, blood and genetic marker analyses at baseline, and a subset of participants underwent actigraph monitoring and completed a sleep diary. Participants are to be followed annually with clinical and neuropsychological assessments, and biannually with the full KBASE assessment, including neuroimaging and laboratory tests. Results-As of March 2017, in total, 758 individuals had volunteered for this study. Among them, in total, 591 participants-291 cognitively normal (CN) old-aged individuals, 74 CN young- and middle-aged individuals, 139 individuals with mild cognitive impairment (MCI), and 87 individuals with AD dementia (ADD)-were enrolled at baseline, after excluding 162 individuals. A subset of participants (n=275) underwent actigraph monitoring. Conclusion-The KBASE cohort is a prospective, longitudinal cohort study that recruited participants with a wide age range and a wide distribution of cognitive status (CN, MCI, and ADD) and it has several strengths in its design and methodologies. Details of the recruitment, study methodology, and baseline sample characteristics are described in this paper.
Lee, Yongho,Kim, Sang-Ok,Mun, Junyoung,Park, Min-Sik,Kim, Ki Jae,Lee, Kwan Young,Choi, Wonchang Elsevier S.A 2017 Journal of Electroanalytical Chemistry Vol.807 No.-
<P><B>Abstract</B></P> <P>The thermal stability of a fully delithiated cathode, coupled with an inorganic salt, organic solvents, and electrolyte, was evaluated with differential scanning calorimetry (DSC) to address the safety issue of lithium-ion batteries. The DSC experiments revealed that vinylene carbonate (VC)-based systems exhibit decreased thermal stability compared to other coexisting systems. The DSC analysis of the cathode and electrolyte in the presence of VC, employed as additives, confirmed the reduction in thermal stability. Our results suggested that VC additives, which have been recently employed to enhance the electrochemical performance in anodes, negatively affect the thermal properties and safety characteristics of the cathode in lithium-ion batteries.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Studied thermal stability of delithiated cathodes and electrolyte components by using DSC </LI> <LI> This study helps address the issue of safety of lithium-ion batteries. </LI> <LI> VC additives are previously known to enhance the performance of the anode. </LI> <LI> Therefore, systems based on VC additive show a decreased thermal stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Use of Baicalin-Conjugated Gold Nanoparticles for Apoptotic Induction of Breast Cancer Cells
Lee, Donghyun,Ko, Wan-Kyu,Hwang, Deok-Sang,Heo, Dong Nyoung,Lee, Sang Jin,Heo, Min,Lee, Kook-Sun,Ahn, Ji-Yoon,Jo, Junyoung,Kwon, Il Keun SPRINGER SCIENCE + BUSINESS MEDIA 2016 NANOSCALE RESEARCH LETTERS Vol.11 No.1
<P>Baicalin (BC) has been used for cancer therapy due to its multiple effects as an anti-cancer drug. However, the effective delivery of this molecule to targeted cells is difficult. Gold nanoparticles (AuNPs) conjugated with thiolated beta cyclodextrin (AuNP-S-β-CD) were used as a delivery vector in this study. Cell viability tests were evaluated by cell counting kit-8 (CCK) and live/dead cell assay. To demonstrate the proliferation inhibition effect on Michigan Cancer Foundation-7 (MCF-7) cells by BC, we analyzed using Hoechst 33342 staining assay and gel electrophoresis. The S-β-CD conjugated AuNPs were characterized by transmission electron microscopy (TEM), 1H nuclear magnetic resonance (<SUP>1</SUP>H NMR), and ultraviolet visible (UV-vis) spectroscopy. AuNP-S-β-CD with approximately 40 μM of BC loaded by inclusion complex showed an inhibition effect on MCF-7 cells by inducing apoptosis. Apoptosis test results were evaluated by analyzing the expression of typical apoptic markers such as cleaved caspase-3, full length caspase-3, and apaf-1 in western blot assay. These results demonstrated that AuNP-S-β-CD-BC inhibited the proliferation of cancerous MCF-7 cells by inducing apoptosis. These findings suggested that AuNP-S-β-CD-BC could be a promising agent for chemotherapeutic usage.</P>
Navigation and Localization of Mobile Robot Based on Vision and Sensor Network Using Fuzzy Rules
Junyoung Heo,Sanghyuk Son,Kijoo Lee,Jaeyeon Lee,Won Chang Lee 한국멀티미디어학회 2008 한국멀티미디어학회 국제학술대회 Vol.2008 No.-
Algorithms of path planning and obstacle avoidance are essential to autonomous mobile robots that are working in unknown environments in the real time. This paper presents a new navigation algorithm of an autonomous mobile robot with vision, IR sensors and Zigbee sensor network using fuzzy rules. Temporary targets are set up by distance variation method and then the algorithms of trajectory planning, obstacle avoidance and localization are designed using fuzzy rules. An autonomous mobile robot with single vision and IR sensors, Zigbee sensor network is built up for experiments. We also show that the proposed algorithms are working well in complex unknown environments.