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Prominent cycling reversibility and kinetics enabled by CaTiO3 protective layer on Zn metal for aqueous Zn-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 245-258页

作者： Gaeun Lee Yong Nam Ahn Seongjoon So Chanwoo park Jong-Seong Bae Taehyun park Il Tae Kim Jaehyun Hur School of Chemical Biological and Battery Engineering Gachon University Seongnam Busan Center Korea Basic Science Institute

Aqueous Zn-ion batteries （AZIBs） have received considerable attention owing to their various advantages such as safety,low cost,simple battery assembly conditions,and high ionic ***,they still suffer from serious problems,including uncontrollable dendrite growth,corrosion,hydrogen evolution reaction （HER） from water decomposition,electrode passivation,and unexpected *** creation of a uniform artificial nanocrystal layer on the Zn anode surface is a promising strategy for resolving these ***,we propose the use of a perovskite CaTiO3（CTO） protective layer on Zn（CTO@Zn） as a promising approach for improving the performance of *** CTO artificial layer provides an efficient pathway for Zn ion diffusion towards the Zn metal because of the high dielectric constant （εr=180） and ferroelectric characteristics that enable the alignment of dipole moments and redistribute the Zn2+ions in the CTO *** avoiding the direct contact of the Zn anode with the electrolyte solution,the uneven dendrite growth,corrosion,parasitic side reactions,and HER are mitigated,while CTO retains its mechanical and chemical robustness during ***,CTO@Zn demonstrates an improved lifespan in a symmetric cell configuration compared with bare ***@Zn shows steady overpotential （～68 m V） for 1500 h at 1 mA cm-2/0.5 mA h cm-2,excelling bare ***,when paired with the V2O5-C cathode,the CTO@Zn//V2O5-C full battery delivers 148.4 mA h g-1（based on the mass of the cathode） after 300 *** study provides new insights into Zn metal anodes and the development of high-performance AZIBs.

关键词： Artificial layer Dielectric constant Zn metal anode Zinc aqueous battery

Investigation of prodromal features in metabolic syndrome based on transcriptome analysis

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Genes & Diseases 2023年第3期10卷 708-711页

作者： Sang-Min park Musun park hyo-Jeong Ban Su-jin Baek Soo Yeon Kim Siwoo Lee Hee-Jeong jin Korean Medicine(KM)Data Division Korea Institute of Oriental MedicineDaejeon 34054Republic of Korea College of Pharmacy Chungnam National UniversityDaejeon 34134Republic of Korea

Metabolic syndrome(MetS)is a complex condition that significantly increases the risk of several diseases,including heart disease and *** with MetS show both pro-inflammatory and pro-thrombotic states;however,the state... 详细信息

关键词： diseases Metabolic Patients

Deep Drawing Process Using a Tractrix Die for Manufacturing Liners for a CNG High-Pressure Vessel(Type Ⅱ)

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Chinese Journal of Mechanical Engineering 2022年第1期35卷 132-143页

作者： Gun‑Young park hyo‑Seo Kwak hyo‑Seong Jang Chul Kim School of Mechanical Engineering Pusan National UniversityPusan 46241South Korea Department of Mechanical Engineering Dong-eui UniversityPusan 47340Korea.

The liner of a CNG pressure vessel is manufactured by a DDI(deep drawing and ironing)process for the cylinder part,which is a continuous process that includes a drawing process to reduce the diameter of the billet and a subsequent ironing process to reduce the thickness of the billet.A tractrix die used in the 1^(st) deep drawing allows the blank to flow smoothly by decreasing the punch load and radial tensile stress occurring in the *** also increases the draw ratio compared to conventional dies,but it causes forming *** this study,a shape coefficient(S_(c))is proposed for the tractrix die using the blank diameter(D_(0)),inflow diameter of the workpiece(d_(i)),and inflow angle of the workpiece(θ)for design of the tractrix *** effects of the thickness and inflow angle of the workpiece on wrinkling and folding were investigated through ***,a discriminant is proposed for the relative radial stress(σ)generated during the deep drawing process using the tractirx die and used to predict *** on the results,the blank thickness,the draw ratio,and the inflow of the workpiece angle in the 1^(st) deep drawing process are suggested,and the number of operations in the DDI process was reduced from 6 to *** improves the productivity and reduces the manufacturing cost.

关键词： Tractrix die Deep drawing Wrinkling Folding LDR(Limit draw ratio) FEM

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Modulating effect of ginseng saponins on heterologously expressed HERG currents in Xenopus oocytes

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Acta Pharmacologica Sinica 2005年第5期26卷 551-558页

作者： Cuk-seongKIM Sook-jinSON hyo-shinKIM Yong-dukKIM Kyu-seungLEE Byeong-hwaJEON Kwang-jinKIM jin-kyu park jin-bong park Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea Korea Ginseng and Tobacco Research Institute Daejeon 305-805 Korea Department of Physiology College of Medicine Chungnam National University Daejeon 301-131 Korea

Aim:To examine the effects of ginseng saponins on the heterologously expressedhuman ether-a-go-go related gene（HERG）that encodes the rapid component ofthe delayed rectifier K+***:A two-electrode voltage clamp tech-nique was *** currents were recorded in Xenopus oocytes injected withHERG ***:Crude saponins of Korean red ginseng（GS）induced aminimal increase of the maximal HERG conductance without changes in the volt-age-dependent HERG current activation and inactivation ***,however,decelerated HERG current deactivation in a concentration-dependent manner,which was more noticeable with panaxitriol（PT）than panaxidiol（PD）.Consistently,ginseng saponins increased the HERG deactivation time constants with the orderof potency of Rg1（a maj or component of PT）>Rf1>Rb1（a major component of PD）.Re had little effect on HERG *** a cardiac action potential,GSincreased the outward HERG ***:Ginseng saponins enhanceHERG currents,which could be in part a possible mechanism of the shorteningcardiac action potential of ginseng saponins.

关键词： Ginseng saponins Xenopus laevis potassium channels action potentials patch-clamp techniques

Effects of an Urban park and Residential Area on the Atmospheric CO_2 Concentration and Flux in Seoul,Korea

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Advances in Atmospheric Sciences 2013年第2期30卷 503-514页

作者： Moon-Soo park Seung jin JOO Chang Seok LEE Center for Atmospheric and Environmental Modeling Seoul 151 919Korea Life and Environmental Engineering Seoul Women's UniversitySeoul 139 774Korea

The CO2 concentrations and fluxes over an urban forest site （Namsan） and an urban residential region （Boramae） in Seoul, Korea, during the non-growing season （2 4 March 2011）, the growing season （10-12 June 2011）, and the late-growing season （22-24 September 2011） were analyzed. The CO2 concentrations of two sites showed nearly the same diurnal variation, with a maximum value occurring during the night and a minimum value occurring during daytime, as well as the same seasonal variation, with a maximum value during the non-growing season （early spring） and a minimum value during the growing season （summer）. The CO2 flux over the urban forest did not show any typical diurnal variation during the non-growing season, but did show diurnal variation with a small positive value during the night and a large negative value during daytime in the growing and late-growing seasons due to photosynthesis in the urban forest. The CO2 flux over the urban residential region showed a positive daily mean value for all periods, with large values during the non-growing season and small values during the growing season, and it also showed diurnal variation with two maxima at 0600-1000 LST and 1800-2400 LST, and two minima at 0300-0600 LST and 1100-1500 LST, and was strongly correlated with the use of liquefied natural gas for cooking and heating by surrounding houses.

关键词： C02 concentration C02 flux Seoul urban forest urban residential region

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Rational strategy for power doubling of monolithic multijunction III-V photovoltaics by accommodating attachable scattering waveguides

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Light(Science & Applications) 2024年第11期13卷 2734-2744页

作者： Shin Hyung Lee hyo jin Kim Jae-Hyun Kim Gwang Yeol park Sun-Kyung Kim Sung-Min Lee School of Electrical Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea Optoelectronic Convergence Research Center Korea Photonics Technology InstituteGwangju 61007Republic of Korea Department of Applied Physics Kyung Hee UniversityYongin 17104Republic of Korea Department of Electrical Engineering Hanyang UniversitySeoul 04763Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul 04763Republic of Korea

While waveguide-based light concentrators offer significant advantages,their application has not been considered an interesting option for assisting multijunction or other two-terminal tandem solar *** this study,we present a simple yet effective approach to enhancing the output power of transfer-printed multijunction InGaP/GaAs solar *** utilizing a simply combinable waveguide concentrator featuring a coplanar waveguide with BaSO4 Mie scattering elements,we enable the simultaneous absorption of directly illuminated solar flux and indirectly waveguided *** deployment of cells is optimized for front-surface photon collection in monofacial *** systematic comparisons across various waveguide parameters,supported by both experimental and theoretical quantifications,we demonstrate a remarkable improvement in the maximum output power of a 26%-efficient cell,achieving an enhancement of~93%with the integration of the optimal scattering ***,a series of supplementary tests are conducted to explore the effective waveguide size,validate enhancements in arrayed cell module performance,and assess the drawbacks associated with rear *** findings provide a comprehensive understanding of our proposed approach towards advancing multi-junction photovoltaics.

关键词： waveguide scattering power

Risk factors for rebleeding after angiographically negative acute gastrointestinal bleeding

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World Journal of Gastroenterology 2009年第32期15卷 4023-4027页

作者： Ijin Joo hyo-Cheol Kim jin Wook Chung Hwan Jun Jae Jae Hyung park Department of Radiology Seoul National University College of Medicine Institute of Radiation Medicine Seoul National University Medical Research Center Clinical Research Institute Seoul National University HospitalSeoul 110-744South Korea

AIM:To identify possible predictive factors for rebleeding after angiographically negative findings in patients with acute non-variceal gastrointestinal ***: From January 2000 to July 2007, 128 patients with acute non-variceal gastrointestinal bleeding had negative f indings after initial angiography. Clinical and laboratory parameters were analyzed ***: Among 128 patients, 62 had no recurrent gastrointestinal bleeding and 66 had recurrent gastrointestinal bleeding within 30 d. As determined by the use of multivariate analysis, an underlying malignancy, liver cirrhosis and hematemesis were significant factors related to recurrent gastrointestinal ***: Clinical factors including underlying malignancy, liver cirrhosis, and hematemesis are important predictors for rebleeding after angiographically negative findings in patients with acute non-variceal gastrointestinal bleeding.

关键词： Angiography Gastrointestinal hemorrhage Predictive factor

Superhydrophobic and antireflective nanograss-coated glass for high performance solar cells

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Nano Research 2014年第5期7卷 670-678页

作者： hyo jin Gwon Yensil park Cheon Woo Moon Sahn Nahm Seok-jin Yoon Soo Young Kim Ho Won Jang Electronic Materials Research Center Korea Institute of Science and Technology Seou1136-791 Korea Department of Materials Science and Engineering Korea University Seoul 136-701 Korea School of Chemical Engineering and Materials Science Chung-Ang University Seou1156-756 Korea Department of Materials Science and Engineering Research Institute of Advanced Materials Seoul National University Seou1151-744Korea

We present a facile method for producing superhydrophobic nanograss-coated （SNGC） glass surfaces that possess both reduced reflectivity and self-cleaning properties at the air/glass interface. The refractive index of a CaF2 nanograss （NG） layer on a glass substrate, deposited by glancing angle vapor deposition, is 1.04 at 500 nm, which is the second-lowest value ever reported so far. The fluorinated NG layer gives rise to a high water contact angle （〉150°） and very efficient cleaning out of dust with water drops. Using the dual functionalities of the SNGC glass, we demonstrate superhydrophobic and antireflective organic photovoltaic cells with excellent power conversion efficiency.

关键词： superhydrophobic antireflective self-cleaning nanograss solar cells glancing angle deposition

Optimal seismic retrofit model for steel moment resisting frames with brittle connections

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Earthquake Engineering and Engineering Vibration 2018年第4期17卷 835-847页

作者： hyo Seon park Se Woon Choi Byung Kwan Oh Department of Architectural Engineering Yonsei University Center for Structural Health Care Technology in Building Yonsei University Department of Architecture Catholic University of Daegu Department of Civil and Environmental Engineering Princeton University

Based on performance-based seismic engineering, this paper proposes an optimal seismic retrofit model for steel moment resisting frames（SMRFs） to generate a retrofit scheme at minimal cost. To satisfy the acceptance criteria for the Basic Safety Objective（BSO） specified in FEMA 356, the minimum number of upgraded connections and their locations in an SMRF with brittle connections are determined by evolutionary computation. The performance of the proposed optimal retrofitting model is evaluated on the basis of the energy dissipation capacities, peak roof drift ratios, and maximum interstory drift ratios of structures before and after retrofitting. In addition, a retrofit efficiency index, which is defined as the ratio of the increment in seismic performance to the required retrofitting cost, is proposed to examine the efficiencies of the retrofit schemes derived from the model. The optimal seismic retrofit model is applied to the SAC benchmark examples for threestory and nine-story SMRFs with brittle connections. Using the retrofit efficiency index proposed in this study, the optimal retrofit schemes obtained from the model are found to be efficient for both examples in terms of energy dissipation capacity, roof drift ratio, and maximum inter-story drift ratio.

关键词： steel moment resisting frame performance-based seismic engineering optimal seismic retrofit evolutionarycomputation

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