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Boost Up the Mechanical and Electrical Property of CNT Fibers by Governing Lyotropic Liquid Crystalline Mesophases with Aramid Polymers for Robust Lightweight Wiring Applications

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Advanced Fiber Materials 2023年第2期5卷 514-526页

作者： Ki‑hyun Ryu jeong‑Gil Kim Dongju lee Seo Gyun Kim Bon‑Cheol Ku Jun Yeon Hwang Kwang‑Un jeong Nam Dong Kim Dae‑Yoon Kim Functional Composite Materials Research Center Korea Institute of Science and TechnologyWanju 55324Republic of Korea Carbon Composite Materials Research Center Korea Institute of Science and TechnologyWanju 55324Republic of Korea Department of Polymer‑Nano Science and Technology Department of Nano Convergence EngineeringJeonbuk National UniversityJeonju 54896Republic of Korea Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea

Monofilament type of polyaromatic amide(PA)and carbon nanotube(CNT)composite fibers is presented.A concept of a lyotropic liquid crystal(LLC)constructed via a spontaneous self-assembly is introduced to mitigate the extremely low com-patibility between PA and *** approaches provide an effective co-processing route of PA and CNT simultaneously to fabricate the uniform,continuous,and reliable composite fibers through a ***,the addition of a small amount PA into the dope solution of CNT governs the LLC mesophase not only in a spinneret stage but also in a coagulant ***,the developed PA/CNT composite fibers have the high uniaxial orientational order and the close interfacial packing compared to the pure CNT *** PA/CNT composite fibers achieve the outstanding tensile strength,electrical conductivity,and electrochemical response,while maintaining a *** also exhibit the chemical,mechanical,and thermal *** of these advantages can make flexible,sewable,and washable PA/CNT composite fibers ideal nanocomposite materials for use in next-generation information and energy transporting system by replacing conventional metal electrical conductors.

关键词： Carbon nanotube Aramid polymer Liquid crystal Composite fiber Electrical wire

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Diamond machining of sinusoidal grid surface using fast tool servo system for fabrication of hydrophobic surface

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中国有色金属学会会刊：英文版 2012年第S3期22卷 787-792页

作者： Hong LU Deug-Woo lee Sang-Min lee jeong-Woo PARK Department of Nano Fusion Technology Pusan National University Department of Nano Mechatronics Engineering Pusan National University Department of Mechanical Design Engineering Chosun University

Ultra-precision diamond machining with piezoelectric-assisted fast tool servo (FTS) was used to produce various free-form surfaces.A low cost,rapid and large area fabrication of uniform hydrophobic surface at room temperature which transfers the FTS fabricated sinusoidal grid surface to the flat film with UV-moulding process was described.A piezoelectric-assisted FTS with high band width of 2 kHz,travel range up to 16 μm and the compact mechanism structure was designed for the sinusoidal grid surface machining and the dynamic performance testing of FTS was described in *** results indicate that the dimensions of sinusoidal grid change with the variation of the FTS machining *** properties of UV-moulded surface were evaluated,the best contact angle was measured to be 120.5° on the sinusoidal grid surface with profile wavelength of 350 μm and peak-to-valley amplitude of about 16 μm.

关键词： fast tool servo system diamond turning sinusoidal grid surface UV-moulding contact angle

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Strangulated small bowel hernia through the port site:A case report

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World Journal of Gastroenterology 2008年第44期14卷 6881-6883页

作者： Jun hyun lee Wook Kim Department of Surgery Holy Family HospitalCollege of MedicineThe Catholic University of KoreaBucheon 420-717South Korea

Port site hernia develops through a fascial or peritoneal layer that was inadequate or not repaired. It is a rare complication of laparoscopic surgery which may lead to serious problems. Here,we present a 77-year-old female,diagnosed with a small bowel hernia through a 10-mm port site. We had performed ten cases of laparoscopy-assisted distal gastrectomy before this case. The patient complained of left lower abdominal pain with a palpable mass. Abdominal CT showed an incarcerated small bowel hernia and the patient underwent segmental resection of the strangulated small bowel through a minimally extended port site incision.

关键词： Port site hernia Strangulated small bowel Minimally extended port site incision

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Cortex cinnamomi extract prevents streptozotocin- and cytokine-induced β-cell damage by inhibiting NF-κB

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World Journal of Gastroenterology 2006年第27期12卷 4331-4337页

作者： Kang-Beom Kwon Eun-Kyung Kim Eun-Sil jeong Young-Hoon lee Young-Rae lee Jin-Woo Park Do-Gon Ryu Byung-hyun Park Department of Physiology School of Oriental MedicineWonkwang UniversityIksan 570-749South Korea Department of Oral Anatomy School of DentistryChonbuk National UniversityJeonju 561-756JeonbukSouth Korea Department of Biochemistry Medical SchoolInstitute for Healthcare Technology DevelopmentMedical Research CenterChonbuk National UniversityJeonju 561-756JeonbukSouth Korea

AIM： To clarify the mechanism underlying the antidiabetic activities of cortex cinnamomi extract （CCE）. METHODS： To induce in vivo diabetes, mice were injected with streptozotocin （STZ） via a tail vein （100 mg STZ/kg body weight）. To determine the effects of CCE, mice were administered CCE twice daily for 7 d by oral gavage starting 1 wk before the STZ injection. Blood glucose and plasma insulin concentration were measured as an index of diabetes. Also, to induce cytotoxicity of RINm5F cells, we treated with cytokines （IL-1β （2.0 ng/mL） and IFN-γ （100 U/mL））. Cell viability and nitric oxide production were measured colorimetrically. Inducible nitric oxide synthase （iNOS） mRNA and protein expression were determined by RT-PCR and Western blotting, respectively. The activation of NF-κβ was assayed by using gel mobility shift assays of nuclear extracts. RESULTS： Treatment of mice with STZ resulted in hyperglycemia and hypoinsulinemia, which was further evidenced by immunohistochemical staining of islets. However, the diabetogenic effects of STZ were completely prevented when mice were pretreated with CCE. The inhibitory effect of CCE on STZ-induced hyperglycemia was mediated through the suppression of iNOS expression. In rat insulinoma RINm5F cells,CCE completely protected against interleukin-1β and interferon-y-mediated cytotoxicity. Moreover, RINm5F cells incubated with CCE showed significant reductions in interleukin-1β and interferon-y-induced nitric oxide production and in iNOS mRNA and protein expression, and these findings correlated well with in vivo observations. CONCLUSION： The molecular mechanism by which CCE inhibits iNOS gene expression appears to involve the inhibition of NF-κβ activation, These results reveal the possible therapeutic value of CCE for the prevention of diabetes mellitus progression,

关键词： Cortex cinnamomi Diabetes Streptozotocin Cytokine NF-κβ

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Process analysis of direct laser melting to fabricate layered hybrid beads

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中国有色金属学会会刊：英文版 2012年第S3期22卷 813-819页

作者： jeong-hwan JANG Sung-min MUN Tae-hyun KIM Young-hoon MOON School of Mechanical Engineering Engineering Research Center for Net Shape and Die ManufacturingPusan National University

The successful fabrication of layered hybrid beads by DLM process is limited by dissimilar melting ranges of different *** the application of DLM process into manufacturing industries,target mechanical properties of final product must be *** analysis was performed for the DLM fabrication of layered hybrid beads by using stainless steel (SS 316L) and titanium *** the analysis of fabrication characteristics,single hybrid bead was formed using SS316L powder onto the base plate and then Ti powder was melted onto the previous melted *** addition,multi-layer hybrid beads were fabricated for the analysis of the layering effects between *** these studies,the effects of the processing parameters,such as laser power,scan rate and scan line spacing on surface morphology were characterized and optimum processing conditions for the DLM fabrication of layered hybrid beads were developed.

关键词： stainless steel 316L Ti powder energy density surface roughness direct laser melting process layered hybrid beads

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Amelioration effects of traditional Chinese medicine on alcohol-induced fatty liver

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World Journal of Gastroenterology 2005年第35期11卷 5512-5516页

作者： hyun-jeong Kwon Yun-Young Kim Se-Young Choung Department of Hygienic Chemistry College of Pharmacy Kyung Hee University Seoul 130-701 South Korea

AIM： To examine the effects of traditional Chinese medicine （TCM） on alcohol-induced fatty liver in rats. TCM consists of Astragalus membranaceus, Morus alba, Crataegus pinnatifida, Alisma orientale, Salvia miltiorrhiza, and Pueraria lobata. METHODS： The rats were separated randomly into five groups. One （the CD group） was fed a control diet for 10 wk, another （the ED group） fed an ethanol-containing isocaloric liquid diet for 10 wk, and the last three （the TCM group） were fed an ethanol-containing isocaloric liquid diet for 10 wk and dosed orally with TCM （222 mg/kg.d, TCM222; 667 mg/kg·d, TCM667; and 2 000 mg/kg.d, TCM2000, respectively） weekly during the last 4 wk. RESULTS： ED group developed fatty liver according to lipid profile and liver histological findings. Compared with the control group, liver/body weight, serum triglyceride （TG） and total cholesterol （TC）, liver TG and TC, serum alanine aminotransferase （ALT） and aspartic aminotransferase （AST） significantly increased in the ED group. Whereas, in the rats administered with TCM, liver/body weight, serum TG and TC, liver TG and TC, serum ALT and AST were significantly decreased, and the degree of hepatic lipid droplets was markedly improved compared with those in the ED group. CONCLUSION： TCM treatment causes significant reduction in alcohol-induced lipid hepatic accumulation, reversing fatty liver and liver damage, and can be used as a remedy for alcoholic fatty liver.

关键词： Fatty liver Alcohol Astragalus membranaceus,Horus alba Crataegus pinnatifida Alisma orientale Salvia miltiorrhiza Pueraria Iobata

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Parameterization and Application of Storm Surge/Tide Modeling Using a Genetic Algorithm for Typhoon Periods

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Advances in Atmospheric Sciences 2011年第5期28卷 1067-1076页

作者： Sung Hyup YOU Yong Hee lee Woo jeong lee Marine Meteorology Division Observation Infrastructure Bureau/KMA Korea Forecast Research Laboratory National Institute of Meteorological Research/KMA Korea Global Environment System Research Laboratory National Institute of Meteorological Research/KMA Korea

A genetic algorithm was used to optimize the parameters of the two-dimensional Storm Surge/Tide Operational Model （STORM） to improve sea level *** genetic algorithm was applied to nine typhoons that affected the Korean Peninsula during *** following model parameters were used：the bottom drag coefficient,the background horizontal diffusivity,Smagorinski＇s horizontal viscosity,and the sea level pressure ***,the simulation results using the optimized,mean,and median parameter values improved sea level *** four estimated parameters improved the sea level prediction by 76% and 54% in the bias and root mean square error for Typhoon Kalmaegi （0807） in 2008,***-month simulations of February and August 2008 were also improved using the estimated *** study demonstrates that parameter optimization on STORM can improve sea level prediction.

关键词： genetic algorithm STORM sea level typhoon

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Benefit of neoadjuvant concurrent chemoradiotherapy for locally advanced perihilar cholangiocarcinoma

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World Journal of Gastroenterology 2017年第18期23卷 3301-3308页

作者： Jang Han Jung hyun Jik lee Hee Seung lee Jung hyun Jo In Rae Cho Moon Jae Chung jeong Youp Park Seung Woo Park Si Young Song Seungmin Bang Division of Gastroenterology Department of Internal Medicine Hallym University Dongtan Sacred Heart Hospital Division of Gastroenterology Department of Internal Medicine and Yonsei Institute of Gastroenterology Yonsei University College of Medicine

To clarify the role of neoadjuvant concurrent chemoradiotherapy (NACCRT) followed by surgical resection for localized or locally advanced perihilar cholangiocarcinoma (CCA).METHODSWe retrospectively reviewed 57 patients who underwent surgical resection with or without NACCRT for perihilar CCA; 12 patients received NACCRT and 45 patients did not received NACCRT. Patients with locally advanced perihilar CCA requiring NACCRT were defined as follows: (1) a mass involving unilateral branches of the portal vein or hepatic artery with insufficient volume of the anticipated remnant lobe; or (2) an infiltrating mass in the main portal vein that was too long for reconstruction, identified at preoperative *** median disease-free survival (DFS) durations of the neoadjuvant and non-neoadjuvant CCRT groups were 26.0 and 15.1 mo, respectively (P = 0.91). The median overall survival (OS) durations of the neoadjuvant and non-neoadjuvant CCRT groups were 32.9 and 27.1 mo, respectively (P = 0.26). The NACCRT group showed a downstaging tendency compared to the non-NACCRT group as compared with the tumor stage confirmed by histological examination after surgery and the tumor stage confirmed by imaging test at the time of diagnosis (P = 0.01).CONCLUSIONNACCRT does not prolong DFS and OS in localized or locally advanced perihilar CCA. However, NACCRT may allow tumor downstaging and improve tumor resectability.

关键词： Klatskin tumor Locally advanced Survival rate Neoadjuvant therapy Chemoradiotherapy

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Risk of ischaemic stroke in patients with transient global amnesia: a propensity-matched cohort study

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Stroke & Vascular Neurology 2022年第2期7卷 101-107页

作者： Sang Hun lee Keon-Yeup Kim jeong-Woo lee So-jeong Park Jin-Man Jung Department of Neurology Korea University Ansan HospitalKorea University College of MedicineAnsanRepublic of Korea Data Science Team Hanmi Pharm.Co.LtdSeoulRepublic of Korea Korea University Zebrafish Translational Medical Research Center AnsanRepublic of Korea

Background The exact pathophysiological mechanism of transient global amnesia(TGA)is *** is debatable whether TGA is a risk factor for ***,here we investigated the possibility of TGA as a risk factor for stroke in a real-world setting using large-scale nationwide health claims *** We used health claims data from the Korean National Health Insurance Service(NHIS).Patients diagnosed with TGA between 2007 and 2013 were *** initially extracted patients without TGA who were preferentially matched for age and sex with the patients with TGA at a ratio of 10:1 from the whole ***,we performed 1:2 propensity score matching analysis to balance the baseline characteristics between the two *** the propensity score-matched dataset,we performed multivariable Cox regression analysis to investigate the association between TGA and stroke type,including ischaemic,haemorrhagic and all stroke *** Patients with TGA(n=14673)were selected from the NHIS *** extracting from the whole database(n=140486)and propensity score matching their data at a 1:2 ratio,a total of 10448 and 20442 patients were finally assigned to the TGA and control groups,*** multivariable Cox regression analysis demonstrated that the TGA group had a higher risk of ischaemic stroke and all types of stroke(adjusted HR=1.194;95%CI:1.043 to 1.368;and HR=1.197;95%CI:1.056 to 1.357,respectively).Conclusions Analysis of the nationwide claims database showed that TGA could be an important risk factor for stroke,especially for ischaemic stroke.

关键词： patients matched transient

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A Study on Small Pest Detection Based on a CascadeR-CNN-Swin Model

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Computers, Materials & Continua 2022年第9期72卷 6155-6165页

作者： Man-Ting Li Sang-hyun lee Department of Computer Engineering Honam UniversityGwangsanguGwangju62399Korea

This study aims to detect and prevent greening disease in citrus trees using a deep neural *** process of collecting data on citrus greening disease is very difficult because the vector pests are too *** this paper,since the amount of data collected for deep learning is insufficient,we intend to use the efficient feature extraction function of the neural network based on the Transformer *** want to use the Cascade Region-based Convolutional Neural Networks(Cascade R-CNN)Swin model,which is a mixture of the transformer model and Cascade R-CNN model to detect greening disease occurring in *** this paper,we try to improve model safety by establishing a linear relationship between samples using Mixup and Cutmix algorithms,which are image processing-based data augmentation *** addition,by using the ImageNet dataset,transfer learning,and stochastic weight averaging(SWA)methods,more accuracy can be *** study compared the Faster Region-based Convolutional Neural Networks Residual Network101(Faster R-CNN ResNet101)model,Cascade Regionbased Convolutional Neural Networks Residual Network101(Cascade RCNN-ResNet101)model,and Cascade R-CNN Swin *** a result,the Faster R-CNN ResNet101 model came out as Average Precision(AP)(Intersection over Union(IoU)=0.5):88.2%,AP(IoU=0.75):62.8%,Recall:68.2%,and the Cascade R-CNN ResNet101 model was AP(IoU=0.5):91.5%,AP(IoU=0.75):67.2%,Recall:73.1%.Alternatively,the Cascade R-CNN Swin Model showed AP(IoU=0.5):94.9%,AP(IoU=0.75):79.8%and Recall:76.5%.Thus,the Cascade R-CNN Swin Model showed the best results for detecting citrus greening disease.

关键词： Cascade R-CNN swin model cascade R-CNN resNet101 model faster R-CNN ResNet101 model mixup cutmix

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