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Arterial stiffness expressed as brachial–ankle pulse wave velocity and gait assessment independent of lower extremity strength:a cross-sectional study in the older men population

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Journal of Geriatric Cardiology 2023年第2期20卷 91-99页

作者： Tae Kyung yoo seunghee Lee Sae-Jong Park Jong-Young Lee Department of Medicine MetroWest Medical CenterFraminghamUSA Department of Physical Education Korea UniversitySeoulSouth Korea Division of Sports Science Korea Institute of Sport ScienceSeoulSouth Korea Division of Cardiology Department of Internal MedicineKangbuk Samsung HospitalSungkyunkwan University School of MedicineSeoulSouth Korea

BACKGROUND Older men are more vulnerable to fatal falls than women,and gait disturbances contribute to the risk of *** have assessed the association between arterial stiffness and gait dysfunction,but the results have been *** study aimed to conduct a cross-sectional analysis to evaluate the association between brachial–ankle pulse wave velocity(baPWV)and gait assessment in older *** Data from the 2014–2015 Korea Institute of Sport Science Fitness Standards project were used for the *** inclusion criteria were men aged>65 years with gait assessment[the 30-s chair stand test(30s-CST),the timed up and go(TUG)test,the figure-of-8 walk(F8W)test,the 2-min step test(2MST),and the 6-min walk test(6MWT)]and baPWV measurement *** linear regression analysis was conducted with multiple confounding factor adjustments,including lower extremity isometric *** A total of 291 participants were included in the *** mean age was 71.38±4.40 *** mean values were as follows:(1)30s-CST,17.48±5.00;(2)TUG test,6.01±1.10 s;(3)F8W test,25.65±4.71 s;(4)2MST,102.40±18.83 per 2 min;and(5)6MWT,500.02±85.65 *** multivariable adjustment,baPWV was associated with the 6MWT(β=−0.037,95%CI:−0.072–−0.002),TUG test(β=0,95%CI:0.000–0.001),and F8W test(β=0.002,95%CI:0.000–0.004).baPWV was not associated with the 30s-CST and *** The current study showed a statistically significant association between gait assessments and arterial stiffness,independent of lower extremity ***,this association was *** prospective studies are needed to elucidate the complex relationship between arterial stiffness and gait dysfunction.

关键词： stiffness sectional pulse

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Extremely rare case of necrotizing gastritis in a patient with autoimmune hepatitis: A case report

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World Journal of Clinical Cases 2021年第14期9卷 3472-3477页

作者： seung Ki Moon Jeong-Ju yoo Sang Gyune Kim Young Seok Kim Department of Internal Medicine Soonchunhyang University Bucheon HospitalBucheon 14584South Korea Department of Gastroenterology and Hepatology Soonchunhyang University School of MedicineBucheon 14584South Korea

BACKGROUND Autoimmune hepatitis can cause liver fibrosis,liver cirrhosis,and hepatocellular *** treatment option include the use of steroids and/or immunesuppressive agents such as ***,these drugs have some side ***,close follow-up is needed during ***,we present an extremely rare case of a patient with an autoimmune hepatitis who died from necrotizing gastritis during immunosuppressive *** SUMMARY A 52-year-old female patient was diagnosed with autoimmune *** treated this patient with immunosuppressive ***-dose steroid treatment was initially *** azathioprine treatment was added while steroid was *** weeks after the start of treatment,she visited the emergency room due to generalized abdominal pain and *** computed tomography scan,the patient was diagnosed with necrotizing gastritis and the patient progressed to septic *** for sepsis was continued in the intensive care ***,the patient died at 6 h after admission to the emergency *** In patients with autoimmune infections undergoing immunosuppressant therapy,rare complications such as necrotizing gastritis may occur,thus requiring clinical attention.

关键词： Autoimmune hepatitis Azathioprine Case report

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Analysis of Material Loss Behavior According to Long-Term Experiments on LDIE-FAC Multiple Degradation of Carbon Steel Materials

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World Journal of Nuclear Science and Technology 2022年第1期12卷 1-10页

作者： Kyeong Mo hwang Dong Jin Lee Hun Yun seung Chang yoo Ji Hyeon Kim SI Business Department KEPCO E&C Gimcheon-si Korea Nuclear Engineering Department UNIST Ulsan-si Korea

Recently, damage caused by liquid droplet impingement erosion (LDIE) in addition to flow-accelerated corrosion (FAC) has frequently occurred in the secondary side steam piping of nuclear power plants, and the damage-occurring frequency is expected to increase as their operating years’ increase. In order to scrutinize its causes, therefore, an experimental study was conducted to understand how the behavior of LDIE-FAC multiple degradation changes when the piping of nuclear power plants is operated for a long time. Experimental results show that more magnetite was formed on the surface of the carbon steel specimen than on the low-alloy steel specimen, and that the rate of magnetite formation and extinction reached equilibrium due to the complex action of liquid droplet impingement erosion and flow-accelerated corrosion after a certain period of time. Furthermore, it was confirmed at the beginning of the experiment that A106 Gr.B specimen has more mass loss than A335 P22 specimen. After a certain period of time, however, the mass loss tends to be the opposite. This is presumed to have resulted from the magnetite formed on the surface playing a role in suppressing liquid droplet impingement erosion. In addition, it was confirmed that the amount of erosion linearly increases under the conditions in which the formation and extinction of magnetite reach equilibrium.

关键词： Liquid Droplet Impingement Erosion (LDIE) Flow-Accelerated Corrosion (FAC) Multiple Degradations ToSPACE Wall Thinning Magnetite

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Varicella-zoster virus meningitis after spinal anesthesia:A case report

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World Journal of Clinical Cases 2022年第25期10卷 9127-9131页

作者： Ye-Won Lee Byunghoon yoo Yun Hee Lim Department of Anesthesiology and Pain Medicine College of MedicineInje UniversitySanggye Paik HospitalSeoul 01757South Korea

BACKGROUND Headache is a common complication of regional *** treatment of post spinal anesthesia headache varies depending on the *** meningitis is rare,it can cause significant harm to the *** dural puncture headache and septic meningitis are the most commonly suspected causes of post spinal anesthesia headache;however,other causes should also be *** SUMMARY A 69-year-old woman was scheduled for varicose vein stripping surgery under spinal *** procedure was performed aseptically,and surgery was completed without any *** 4 d,the patient visited the emergency room with complaints of headache,nausea,and *** examination revealed that the patient was *** the history of spinal anesthesia,post dural puncture headache and septic meningitis was initially suspected,and the patient was treated with empirical ***,varicella-zoster virus PCR test result was positive,and all other test results were *** patient was diagnosed with meningitis caused by varicella-zoster virus and was treated with acyclovir for 5 *** headache improved,and the patient was discharged without any *** Viral meningitis due to virus reactivation may cause headache after regional ***,clinicians should consider multiple etiologies of headache.

关键词： Aseptic meningitis Headache Regional anesthesia Spinal anesthesia Varicella zoster virus infection Case report

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Obesity and novel management of inflammatory bowel disease

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World Journal of Gastroenterology 2023年第12期29卷 1779-1794页

作者： Jee Hyun Kim Chang-Myung Oh Jun hwan yoo Department of Gastroenterology CHA Bundang Medical CenterCHA University School of MedicineSeongnam 13496South Korea Department of Biomedical Science and Engineering Gwangju Institute of Science and TechnologyGwangju 62465South Korea Institute of Basic Medical Sciences CHA University School of MedicineSeongnam 13496South Korea

Obesity is prevalent within the inflammatory bowel disease(IBD)population,particularly in newly developed *** epidemiological studies have suggested that 15%-40%of IBD patients are obese,and there is a potential role of obesity in the pathogenesis of *** dysfunction of mesenteric fat worsens the inflammatory course of Crohn’s disease and may induce formation of strictures or ***,obesity may affect the disease course or treatment response of *** the increasing data supporting the pathophysiologic and epidemiologic relationship between obesity and IBD,obesity control is being suggested as a novel management for ***,this review aimed to describe the influence of obesity on the outcomes of IBD treatment and to present the current status of pharmacologic or surgical anti-obesity treatments in IBD patients.

关键词： Obesity Inflammatory bowel disease Crohn’s disease Ulcerative colitis

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Amputation stump management:A narrative review

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World Journal of Clinical Cases 2022年第13期10卷 3981-3988页

作者： yoo Jin Choo Du hwan Kim Min Cheol Chang Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityDaegu 705-717South Korea Department of Physical Medicine and Rehabilitation College of MedicineChung-Ang UniversitySeoul 06973South Korea Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityTaegu 705-717South Korea

In this review intended for medical staff involved in patient rehabilitation,we provided an overview of the basic methods for managing amputation *** the amputation surgery,it is imperative to optimize the remaining physical abilities of the amputee through rehabilitation processes,including postoperative rehabilitation,desensitization,and continuous application of soft or rigid dressings for pain reduction and shaping of the *** on the situation,a prosthesis may be worn in the early stage of recovery or an immediate postoperative prosthesis may be applied to promote stump ***,to maintain the range of motion of the stump and to prevent deformation,the remaining portion of the limb should be positioned to prevent *** exercises should also be performed to improve muscle strength to ensure that the amputee is able to perform activities of daily living,***,clean wound or edema management of the stump is necessary to prevent problems associated with wearing the *** review is expected to contribute to the establishment of basic protocols that will be useful for stump management from the time of completion of amputation surgery to the fitting of a prosthesis to optimize patient recovery.

关键词： Amputation Amputee Management Rehabilitation Stump Review

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Sensitivity of Snowfall Characteristics to Meteorological Conditions in the Yeongdong Region of Korea

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Advances in Atmospheric Sciences 2021年第3期38卷 413-429页

作者： yoo-Jun KIM So-Ra IN Hae-Min KIM Jin-hwa LEE Kyu Rang KIM seungbum KIM Byung-Gon KIM High Impact Weather Research Department National Institute of Meteorological SciencesGangneung 25457Korea Operational Systems Development Department National Institute of Meteorological SciencesSeogwipo 63568Korea Department of Atmospheric Environmental Sciences Gangneung-Wonju National UniversityGangneung 25457Korea

This study investigates the characteristics of cold clouds and snowfall in both the Yeongdong coastal and mountainous regions under different meteorological conditions based on the integration of numerical modeling and three-hourly rawinsonde observations with snow crystal photographs for a snowfall event that occurred on 29−30 January *** found that rimed particles predominantly observed turned into dendrite particles in the latter period of the episode when the 850 hPa temperature decreased at the coastal site,whereas the snow crystal habits at the mountainous site were largely needle or rimed *** soundings showed a well-defined,two-layered cloud structure along with distinctive wind-directional shear,and an inversion in the equivalent potential temperature above the low-level cloud *** first experiment with a decrease in lower-layer temperature showed that the low-level cloud thickness was reduced to less than 1.5 km,and the accumulated precipitation was decreased by 87%compared with the control *** difference in precipitation amount between the single-layered experiment and control experiment(two-layered)was not so significant to attribute it to the effect of the seeder−feeder *** precipitation in the last experiment by weakening winddirectional shear was increased by 1.4 times greater than the control experiment specifically at the coastal site,with graupel particles accounting for the highest proportion(~62%).The current results would improve snowfall forecasts in complicated geographical environments such as Yeongdong in terms of snow crystal habit as well as snowfall amount in both time and space domains.

关键词： Yeongdong snow crystal rawinsonde cloud-resolving model

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Efficient thermal management and all-season energy harvesting using adaptive radiative cooling and a thermoelectric power generator

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能源化学:英文版 2023年第9期84卷 496-501页

作者： Chanil Park Woohwa Lee Choyeon Park Sungmin Park Jaeho Lee Yong Seok Kim Youngjae yoo Advanced Materials Division Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Republic of Korea Department of Mechanical and Aerospace Engineering University of CaliforniaIrvineCA 92617United States Department of Advanced Materials Engineering Chung-Ang UniversityAnseong 17546Republic of Korea

Passive daytime radiative cooling(PDRC) is useful for thermal management because it allows an object to emit terrestrial heat into space without the use of additional *** produce sub-ambient temperatures under direct sunlight,PDRC materials are designed to reduce their absorption of solar energy and to enhance their long-wavelength infrared(LWIR) *** recent years,many photonic structures and polymer composites have been studied to improve the cooling system of ***,in cold weather(i.e. during winter in cold climates),buildings need to be kept warm rather than cooled due to heat *** overcome this limitation,temperature-responsive radiative cooling is a promising *** the present study,adaptive radiative cooling(ARC) film fabricated from a polydimethylsiloxane/hollow SiO_(2) microsphere/thermochromic pigment composite was *** found that the ARC film absorbed solar radiation under cold conditions while exhibiting radiative cooling at ambient temperatures above 40℃.Thus,in outdoor experiments,the ARC film achieved sub-ambient temperatures and had a theoretical cooling power of 63.2 W/m~2 in hot *** also demonstrated that radiative cooling with an energy harvesting system could be used to improve the energy management of buildings,with the thermoelectric module continuously generating output power using the ARC ***,we believe that our proposed ARC film can be employed for efficient thermal management of buildings and all-season energy harvesting in the near future.

关键词： Thermal management Daytime radiative cooling Temperature-adaptive film Thermoelectric device Energy harvesting

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Curved copper nanowires-based robust flexible transparent electrodes via all-solution approach

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Nano Research 2017年第9期10卷 3077-3091页

作者： Zhenxing Yin seung Keun Song Sanghun Cho Duck-Jae You Jeeyoung yoo Suk Tai Chang Youn Sang Kim Program in Nano Science and Technology Graduate School of Convergence Science and Technology Seoul National University Seoul 08826 Republic of Korea School of Chemical Engineering and Materials Science Chung-Ang University Seou106974 Republic of Korea Advanced Institutes of Convergence Technology 145 Gwanggyo-ro Yeongtong-gu Suwon-si Gyeonggi-do 16229 Republic of Korea

Curved Cu nanowire (CCN)-based high-performance flexible transparent conductive electrodes (FTCEs) were fabricated via a fully solution-processed approach, involving synthesis, coating, patterning, welding, and transfer. Each step involved an innovative technique for completing the all-solution processes. The high-quality and well-dispersed CCNs were synthesized using a multi-polyol method through the synergistic effect of specific polyol reduction. To precisely control the optoelectrical properties of the FTCEs, the CCNs were uniformly coated on a polyimide (PI) substrate via a simple meniscus-dragging deposition method by tuning several coating parameters. We also employed a polyurethane (PU)-stamped patterning method to effectively produce 20 μm patterns on CCN thin films. The CCN thin films exhibited high electrical performance, which is attributed to the deeply percolated CCN network formed via a solvent-dipped welding method. Finally, the CCN thin films on the PI substrate were partially embedded and transferred to the PU matrix to reduce their surface roughness. Through consecutive processes involving the proposed methods, a highly percolated CCN thin film on the PU matrix exhibited high optoelectrical performance (R s = 53.48 Ω/□ at T = 85.71%), excellent mechanical properties (R/R 0 < 1.10 after the 10th repetition of tape peeling or 1,000 bending cycles), and a low root-mean-square surface roughness (R rms = 14.36 nm).

关键词： curved Cu nanowires all-solution processes 20 μm patterns high performance transparent electrode

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Micro/nano-wrinkled elastomeric electrodes enabling high energy storage performance and various form factors

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Carbon Energy 2023年第12期5卷 137-152页

作者： Changeun yoo Seokmin Lee Yongkwon Song Woojae Chang Moon Kyu Park Younji Ko Jinhan Cho Department of Chemical and Biological Engineering Korea UniversitySeoulSeongbuk-guRepublic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSeongbuk-guRepublic of Korea Soft Hybrid Materials Research Center Advanced Materials Research DivisionKorea Institute of Science and Technology(KIST)Seongbuk-guSeoulRepublic of Korea

Stretchable elastomer-based electrodes are considered promising energy storage electrodes for next-generation wearable/flexible electronics requiring various shape ***,these elastomeric electrodes suffer from the limited electrical conductivity of current collectors,low charge storage capacities,poor interfacial interactions between elastomers and conductive/active materials,and lack of shape *** this study,we report hierarchically micro/nano-wrinkle-structured elastomeric electrodes with notably high energy storage performance and good mechanical/electrochemical stabilities,simultaneously allowing various form *** this study,a swelling/deswelling-involved metal nanoparticle(NP)assembly is first performed on thiol-functionalized polydimethylsiloxane(PDMS)elastomers,generating a micro-wrinkled structure and a conductive seed layer for subsequent *** the assembly of metal NPs,the conformal electrodeposition of Ni and NiCo layered double hydroxides layers with a homogeneous nanostructure on the micro-wrinkled PDMS induces the formation of a micro/nano-wrinkled surface morphology with a large active surface area and high electrical *** on this unique approach,the formed elastomeric electrodes show higher areal capacity and superior rate capability than conventional elastomeric electrodes while maintaining their electrical/electrochemical properties under external mechanical *** notable mechanical/electrochemical performance can be further enhanced by using spiral-structured PDMS(stretchability of~500%)and porous-structured PDMS(areal capacity of~280μAh cm^(-2)).

关键词： elastomeric electrodes electrodeposition micro/nano-wrinkled structures

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