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Solar Driven 15.7% Hydrogen Conversion by ha.mony of Light ha.vesting,Electron Transporting Bridge,and S-Defection in a Self-Assembled Microscale CuS/rGO/CP Photoanode

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Energy & Environmental Materials 2024年第3期7卷 190-201页

作者： Sujeong Kim Boseok Seo Hyerim Park Younghwan Im Jeong Yeon Do Byung sub Kwak Namgyu Son Minkyu Kim Misook Kang Department of Chemistry College of Natural SciencesYeungnam UniversityGyeongsan Gyeongbuk 38541Korea School of Chemical Engineering Yeungnam UniversityGyeongsan Gyeongbuk 38541Korea Department of Energy and Hydrocarbon Chemistry Graduate School of EngineeringKyoto UniversityKyoto 615-8510Japan Korea Evaluation Institute of Industrial Technology(Keit) Cheomdan-Ro 8-GilDong-GuDaegu 41069Korea Korea Electric Power Research Institute(KEPRI)105 Munji-ro Yooseong-guDaejeon 34056Korea

CuS is an encouraging photoelectrode candidate tha. meets the essential requirements for efficient solar-to-hydrogen production,but it ha. not been thoroughly studied.A CuS light absorber layer is grown by the self-assembly of copper and sulfur precursors on a carbon paper(CP)***,rGO is introduced as a buffer layer to control the optical and electrical properties of the *** well-ordered microstructural arrangement suppresses the recombination loss of electrons and holes owing to enha.ced cha.ge-carrier generation,separation,and *** potential reaching 10 mA cm^(-2)in 1.0 M KOH solution is significantly lowered to 0.87 V,and the photocurrent density at 1.23 V is 94.7 mA cm^(-2).The computational result reveals tha. the potential-determining step is sensitive to O^(*)stability;the lower stability of O^(*)in the thin layer of CuS/rGO decreases the free-energy gap between the initial and final states of the potential-determining step,resulting in a lowering of the onset *** faradaic efficiency for the photoelectrochemical oxygen evolution reaction in the optimized 2CuS/1rGO/CP photoanode is 98.60%,and the applied bias photon-to-current and the solar-to-hydrogen efficiencies are 11.2%and 15.7%,respectively,and its ultra-high performance is maintained for 250 *** record-breaking achievement indices may be a trigger for establishing a green hydrogen economy.

关键词： 15.7%-solar to hydrogen density functional theory lower photopotential p-CuS/rGO/CP photoanode photoelectrochemical oxygen evolution

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Meningioma originating from the superior petrosal vein without dural attachment:A case report

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World Journal of Clinical Cases 2024年第17期12卷 3156-3160页

作者： Yeong-Jin Kim Shin Jung Tae-Young Jung Kyung-sub Moon In-Young Kim Department of Neurosurgery Chonnam National University Medical SchoolChonnam National University Hwasun HospitalHwasun 58128South Korea

BACKGROUND Meningioma in the cerebellopontine angle(CPA)without dural attachment is extremely *** report a unique case of meningioma derived from the superior petrosal vein without dural *** SUMMARY A 44-year-old right-ha.ded woman presented with a two-month history of headache and *** magnetic resonance imaging showed a well-defined contrast-enha.cing lesion in the right CPA without a dural tail *** resection was performed using a right retro sigmoid approach.A dural attachment was not seen at the tentorium or posterior surface of the petrous *** tumor was firmly adherent to the superior petrosal *** origin site was cauterized and resected with the preservation of the superior petrosal vein.A diagnosis of meningothelial meningioma was *** patient’s headache and tinnitus gradually disappeared,and a recurrence was not observed five years after the *** The rare occurrence of meningioma without dural attachment makes it difficult to determine dural attachment before *** absence of dural attachment makes it easy to completely resect such *** related to tumors should be removed carefully,considering the possible presence of tumor stem cells in the microvessels.

关键词： Meningioma Dura mater Superior petrosal vein Tumor stem cell Case report

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Ruptured venous aneurysm associated with a dural arteriovenous fistula:Two case reports

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World Journal of Clinical Cases 2024年第29期12卷 6314-6319页

作者： You sub Kim Woong Yoon Byung Hyun Baek Seul Kee Kim Sung Pil Joo Tae Sun Kim Department of Neurosurgery Chonnam National University Hospital and Medical SchoolGwangju 61469South Korea Department of Radiology Chonnam National University Hospital and Medical SchoolGwangju 61469South Korea Department of Radiology Chonnam National University Hwasun HospitalHwasungun 58128South Korea

BACKGROUND In general,venous aneurysm associated with dural arteriovenous fistula(dAVF)is considered to be developed under long standing venous hypertension and manifested as venous ectasia of draining vein ***,discrete saccular sha.ed venous aneurysm without angiographic evidence of venous hypertension arising from the draining vein,like cerebral arterial aneurysm,is quite rare and its pathomecha.ism remains unclear in patients with *** SUMMARY In this report,we present two cases of ruptured saccular venous aneurysms associated with dAVF without venous hypertension or venous *** both cases,significant curve or stenosis is observed in draining vein,which is located in just distal portion of the venous *** aneurysms were successfully treated with a transarterial *** mecha.ism of venous aneurysms in these cases is *** Although there is little doubt tha. hemodynamic stress ha. a critical role in the development of venous aneurysms in patients with dAVF,preceding venous hypertension or venous ectasia is not necessary for development and enlargement of venous *** the significant risk of rupture,a careful review of draining vein features including tortuosity or stenosis is needed,especially in venous aneurysms without evidence of venous hypertension.

关键词： Dural arteriovenous fistula Venous aneurysm Hemodynamic stress Intracranial hemorrha.e Embolization Case report

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强噪环境下分频段数字音频信号精细化采集研究

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现代电子技术 2024年第11期47卷 64-68页

作者：哈筝山西大学音乐学院山西太原030006

在强噪环境下,为了获取高质量、低失真度的数字音频信号,提出一种强噪环境下分频段数字音频信号精细化采集方法。通过麦克风设备获取音频信号,利用LM4550芯片对其作采样、编码等处理后生成数字音频信号,基于AC-97单元接收数字音频信号,... 详细信息

在强噪环境下,为了获取高质量、低失真度的数字音频信号,提出一种强噪环境下分频段数字音频信号精细化采集方法。通过麦克风设备获取音频信号,利用LM4550芯片对其作采样、编码等处理后生成数字音频信号,基于AC-97单元接收数字音频信号,利用频段分割器对其作频带分解,获得互不重叠子频段数字音频信号。采用多窗谱谱减法对其去噪,利用数据通信接口将其传输给LM4550芯片,在完成模拟信号转换后,通过耳机输出,实现数字音频信号精细化采集。实验结果表明,该方法处理后的各子频段数字音频信号有用信息得以完整保留,并提高了信号波形的规整度和规律性,强噪声环境下数字音频信号的PESQ指标达到4.08以上,最大失真度为3.74%。

关键词：强噪环境分频段数字音频信号 FPGA 频段分割器多窗谱谱减法通信接口模拟信号

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中国女性外生殖器官整复手术临床实践指南(2024版)

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中华妇产科杂志 2024年第2期59卷 108-117页

作者：中国整形美容协会科技创新与器官整复分会段华不详首都医科大学附属北京妇产医院妇科微创诊治中心北京妇幼保健院北京100006

女性外生殖器官是维持女性生理功能、性功能以及盆底功能稳定的重要解剖学结构。由于部位隐蔽、涉及隐私,出现病损或功能障碍时患者往往羞于启齿。近年来,女性外生殖器官整复手术在一些医疗机构或诊所不断开展甚至滥用,并由此引发了诸... 详细信息

女性外生殖器官是维持女性生理功能、性功能以及盆底功能稳定的重要解剖学结构。由于部位隐蔽、涉及隐私,出现病损或功能障碍时患者往往羞于启齿。近年来,女性外生殖器官整复手术在一些医疗机构或诊所不断开展甚至滥用,并由此引发了诸多医患纠纷、医疗事故甚至死亡案例。中国整形美容协会科技创新与器官整复分会着眼女性外生殖器官整复的医学内涵,结合国内外最新循证医学证据和我国女性外生殖器官整复临床实践中的治疗现状,围绕女性外生殖器官解剖要点与功能、常见整复手术的适应证、术前评估、手术要点、手术并发症以及疗效评价等,从临床专业角度撰写本指南,旨在规范女性外生殖器官整复手术治疗,促进本领域的发展回归医疗本质,为女性外生殖器官病损或功能障碍患者提供专业的医疗服务。

关键词：临床专业死亡案例整复手术手术要点功能障碍解剖学结构整形美容临床实践

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“合”而不同:高校合并异质性对内部经费配置的影响研究

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中国高教研究 2024年第3期 69-76页

作者：杜思慧张文杰哈巍北京大学教育经济研究所北京100871

合并是世界范围内高等教育改革的重要工具,但相关成效评估尚缺乏规模经济视角下的分类型、跨时期经验证据。基于我国134所本科高校1993—2016年教育经费统计数据,运用双向固定效应模型发现:整体而言,合并仅对高校少数支出指标有个别时... 详细信息

合并是世界范围内高等教育改革的重要工具,但相关成效评估尚缺乏规模经济视角下的分类型、跨时期经验证据。基于我国134所本科高校1993—2016年教育经费统计数据,运用双向固定效应模型发现:整体而言,合并仅对高校少数支出指标有个别时期的微弱影响;异质性分析进一步表明,合并对高校内部经费配置的影响有办学水平、院校类型、学科门类差异,原“211工程”高水平合并、本科间合并、综合性合并均使高校总支出及部分子项显著上涨,与之相对的各类合并则使高校办学支出显著下降,影响模式分化在合并发生后持续存在且有所加强。基于高校合并后规模经济与规模不经济并存的现象,提出综合评估合并风险、全面审视合并效益、加强相关高校成本管理等对策建议。

关键词：高校合并内部经费配置办学支出异质性

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Effects of multi-dopants （Zn and Ho） in stabilizing spinel structure for cathode materials in lithium recha.geable batteries-Novel chelated sol-gel synthesis

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Particuology 2016年第1期14卷 87-95页

作者： R. Thirunakaran Taewha. Kim Won-sub Yoon CSIR-Central Electrochemical Research Institute Karaikudi 630 006 Tamil Nadu India Department of Energy Science Sungkyunkwan University Suwon 440-746 South Korea

Multi-doped spinels, namely LiMn204 and LiZnxHoyMn2 x yO4 （x=0.10-0.18; y= 0.02-0.10）, for use as cathode materials for lithium-ion recha.geable batteries were synthesized via sol-gel method, using lauric acid as the chelating agent, to obtain micron-sized particles. The physical properties of the synthesized samples were investigated using differential thermal analysis, Fourier-transform infrared spectroscopy, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy, energy-dispersive X-ray analysis, and electrochemical methods. XRD showed tha. LiMn204 and LiZnxHoyMn2_x y04 ha.e high degrees of crystallinity and good pha.e purities. The SEM images of LiMn204 showed an ice-cube morphology with particles of size 1 μm. Cha.ge-discha.ge studies showed tha. undoped LiMn2 O4 delivered the discha.ge capacity of 124 mA h/g with coulombic efficiency of 95% during the first cycle, whereas doped spinels delivered discha.ge capacities of 125, 120, and 127 mA h/g in the first cycle with coulombic efficiencies of 96%, 91%, and 91%, respectively.

关键词： Holmium Zinc Lauric acid Sol-gel Spinel cathode Lithium-ion battery

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Reprogramming cholesterol metabolism in macropha.es and its role in host defense against cholesterol-dependent cytolysins

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Cellular & Molecular Immunology 2022年第3期19卷 327-336页

作者： Min-sub Lee Steven J.Bensinger Department of Molecular and Medical Pha.macology University of CaliforniaLos AngelesCA90095USA Department of Microbiology Immunology and Molecular GeneticsUniversity of CaliforniaLos AngelesCA90095USA

Cholesterol is a critical lipid for all mammalian cells,ensuring proper membrane integrity,fluidity,and biochemical *** evidence indicates tha. macropha.es rapidly and profoundly reprogram their cholesterol metabolism in response to activation signals to support host defense ***,our understanding of the molecular details underlying how and why cholesterol homeostasis is specifically resha.ed during immune responses remains less well *** review discusses our current knowledge of cellular cholesterol homeostatic machinery and introduces emerging concepts regarding how plasma membrane cholesterol is partitioned into distinct *** then discuss how proinflammatory signals can markedly resha.e the cholesterol metabolism of macropha.es,with a focus on the differences between MyD88-dependent pattern recognition receptors and the interferon signaling *** also discuss recent work investigating the capacity of these proinflammatory signals to selectively resha.e plasma membrane cholesterol *** examine how these cha.ges in plasma membrane cholesterol metabolism influence sensitivity to a set of microbial pore-forming toxins known as cholesterol-dependent cytolysins tha. specifically target cholesterol for their effector *** also discuss whether lipid metabolic reprogramming can be leveraged for therapy to mitigate tissue damage mediated by cholesterol-dependent cytolysins in necrotizing fasciitis and other related *** expect tha. advancing our understanding of the crosstalk between metabolism and innate immunity will help explain how inflammation underlies metabolic diseases and highlight pathways tha. could be targeted to normalize metabolic homeostasis in disease states.

关键词： Cholesterol Macropha.es Innate Immunity Metabolism

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Synthesis and electrochemical properties of dual doped spinels LiNi_xAl_yMn_(2-x-y)O_4 via facile novel chelated sol–gel method as possible cathode material for lithium recha.geable batteries

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Journal of Energy Chemistry 2017年第1期26卷 101-114页

作者： R.Thirunakaran Gil Hwan Lew Won-sub Yoon CSIR-Central Electrochemical Research Institute Sungkyunkwan University Department of Energy Science

LiMnOand LiNiAlyMnO（x= 0.50;y = 0.05-0.50） powders ha.e been synthesized via facile solgel method using Behenic acid as active cheiating *** synthesized samples are subjected to physical cha.acterizations such as thermo gravimetric analysis（TG/DTA）,X-ray diffraction（XRD）,Fourier transform infrared spectroscopy（FT-IR）,field-emission scanning electron microscopy（FESEM）,transmission electron microscopy（TEM） and electrochemical studies viz.,galvanostatic cycling properties,electrochemical impedance spectroscopy（EIS） and differential capacity curves（dQ/dE）.Finger print XRD patterns of LiMnOand LiNiAlMnOfortify the high degree of crystallinity with better pha.e *** images of the undoped pristine spinel illustrate uniform spherical grains surface morphology with an average particle size of 0.5 μm while Ni doped particles depict the spherical grains growth（50nm） with ice-cube surface *** images of the spinel LiMnOshows the uniform spherical morphology with particle size of（100 nm） while low level of Al-doping spinel（LiNio.5Alo.05Mn1.45O4） displaying cloudy particles with agglomerated particles of（50nm）.The LiMnOsamples calcined at 850℃ deliver the discha.ge capacity of 130 mAh/g in the first cycle corresponds to 94%coiumbic efficiency with capacity fade of 1.5 mAh/g/cycle over the investigated 10 *** all four dopant compositions investigated,LiNiAlMnOdelivers the maximum discha.ge capacity of 126 mAh/g during the first cycle and shows the stable cycling performance with low capacity fade of 1 mAh/g/cycle（capacity retention of 92%） over the investigated 10 *** impedance studies of spinel LiMnOand LiNiAlMnOdepict the high and low real polarization of 1562 and 1100 Ω.

关键词： Multi-doping Sol–gel method Behenic acid Differential capacity Spinel cathode

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Effect of Fe_2P in LiFePO_4/Fe_2P composite on electrochemical properties synthesized by MA and control of heat condition

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Rare Metals 2006年第z2期25卷 179-183页

作者： PARK Jong Suk LEE Kyung Tae LEE Kyung sub Department of Material Science and Engineering Hanyang University Seoul 133-731 Korea

In order to control the size and distribution of the high conductive Fe2P in LiFePO4/Fe2P composite, two different cooling rates (Fast: 15 ℃·min-1, Slow: 2 ℃·min-1) were employed after mecha.ical alloying. The discha.ge capacity of the fast cooled was 83 mAh·g-1 and the slow cooled 121 mAh·g-1. The particle size of the synthesized powder was examined by transmission electron microscopy and distribution of Fe2P was cha.acterized using scanning electron microscopy (SEM). In addition, two-step heat treatment was carried out for better distribution of Fe2P. X-ray diffraction (XRD) and Rietveld refinement reveal tha. LiFePO4/Fe2P composite consists of 95.77% LiFePO4 and 4.33% of Fe2P.

关键词： LiFePO4/Fe2P composite mecha.ical alloying heat treatment discha.ge capacity

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