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Denitrification Rates and Their Controlling Factors in Streams of the Han River Basin with Different Land-Use Patterns

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Pedosphere 2014年第4期24卷 516-528页

作者： S.P.jUNG y.j.kim H.KANG School of Civil and Environmental Engineering Yonsei UniversitySeoul 120-749(Korea) River and Coastal Research Division Korea Institute of Construction TechnologyGoyang 211-712(Korea)

Land-use patterns can affect various nutrient cycles in stream ecosystems,but little information is available about the effects of urban development on denitrification processes at the watershed *** the presented study,we investigated the controlling factors of denitrification rates within the streams of the Han River Basin,Korea,with different land-use patterns,in order to enhance the effectiveness of water resource management *** watersheds were classified into three land-use patterns(forest,agriculture and urban) using satellite images and geographic information system techniques,and in-situ denitrification rates were determined using an acetylene blocking ***,sediment samples were collected from each stream to analyze denitrifier communities and abundance using molecular ***-situ denitrification rates were found to be in the order of agricultural streams(289.6 mg N_2O-N m^(-2) d^(-1)) > urban streams(157.0 mg N_2O-N m^(-2) d^(-1)) > forested streams(41.9 mg N_2O-N m^(-2) d^(-1)).In contrast,the average quantity of denitrifying genes was the lowest in the urban *** diversity of denitrifying genes was not affected by watershed land-use pattern,but exhibited stream-dependent *** significance factors were involved in denitrification in the sites with higher denitrification *** linear regression analysis revealed that clay,dissolved organic carbon and water contents were the main factors controlling denitrification rate in the agricultural streams,while dissolved organic carbon was the main controlling factor in the urban *** contrast,temperature appeared to be the main controlling factor in the forested streams.

关键词：土地利用模式反硝化速率森林溪流汉江流域影响因素地理信息系统技术多元线性回归分析分子生物学方法

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对肝硬化病人应用压缩感知和同时应用超快速并行采集技术行肝胆期成像

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国际医学放射学杂志 2024年第3期 377-377页

作者： S.yoon y.S.Shim S.H.Park j.Sung M.D.Nickel y.j.kim 余翔玲

摘要目的旨在比较肝硬化病人用压缩感知（CS）和同时应用超快速并行采集技术（CAPIRINHA）的肝胆期（HBP）成像的影像质量和局灶病变检测能力。方法回顾性纳入

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Retrieval of the Single Scattering Albedo of Asian Dust Mixed with Pollutants Using Lidar Observations

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Advances in Atmospheric Sciences 2014年第6期31卷 1417-1426页

作者： Sungkyun SHIN young Min NOH Kwonho LEE Hanlim LEE Detlef MLLER y.j.kim Kwanchul kim Dongho SHIN School of Environmental Science and Engineering Gwangju Institute of Science and TechnologyKorea Department of Geoinformatics Engineering Kyungil UniversityKorea Department of Spatial Information Engineering Pukyong National UniversityKorea Science System and Applications Inc. NASA Langley Research CenterUSA University of Hertfordshire United Kingdom

The vertical distribution of single scattering albedos （SSAs） of Asian dust mixed with pollutants was derived using the multi-wavelength Raman lidar observation system at Gwangju （35.10°N,126.53°E）.Vertical profiles of both backscatter and extinction coefficients for dust and non-dust aerosols were extracted from a mixed Asian dust plume using the depolarization ratio from lidar *** profiles of backscatter and extinction coefficients of non-dust particles were input into an inversion algorithm to retrieve the SSAs of non-dust *** aerosol layers at different heights had different light-absorbing *** SSAs of non-dust particles at each height varied with aerosol type,which was either urban/industrial pollutants from China transported over long distances at high altitude,or regional/local pollutants from the Korean *** advantage of independent profiles of SSAs of non-dust particles,vertical profiles of SSAs of Asian dust mixed with pollutants were estimated for the first time,with a new approach suggested in this study using an empirical determination of the SSA of pure *** SSAs of the Asian dust-pollutants mixture within the planetary boundary layer （PBL） were in the range 0.88-0.91,while the values above the PBL were in the range 0.76-0.87,with a very low mean value of 0.76 ± *** total mixed dust plume SSAs in each aerosol layer were integrated over height for comparison with results from the Aerosol Robotics Network （AERONET） *** of SSA retrieved from lidar observations of 0.92 ± 0.01 were in good agreement with the results from AERONET measurements.

关键词： lidar Asian dust depolarization ratio microphysical properties single scattering albedo

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Single-phase Active Power Filter based on Rotating Reference Frame Method

Single-phase Active Power Filter based on Rotating Reference...

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2005国际电机与系统学术会议

作者： y.j.kim j.S.kim y.S.kim Department of Computer Aided Control Yuhan CollegeBucheon 185-34Korea Deptment.of Electrical Engineering Inha UniversityInchon 402-751Korea Deptment.of Electrical Engineering Inha UniversityInchon 402-751Korea

＜正＞ This paper presents a new control method of the single-phase active power filter （APF） for the compensation of harmonic current components in nonlinear loads. In order to use a new transformation theory, the two-phase system by constructing a imaginary second-phase is formed. In the conventional method, an imaginary-phase lagged to the load current T/4（here T is the fundamental cycle） is made. But in this proposed method, the new signal as the second phase is the delayed through the filter. As this control method is applied to the system of single-phase, an instantaneous calculation was developed rather by using the rotating reference frames synchronized with source-frequency than by applying instantaneous reactive power theory that uses the conventional fixed reference *** control scheme of single-phase APF is analyzed with the experimental results in a laboratory prototype to verify the validities of the proposed control methods.

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转基因NOD小鼠胰腺Kuzbanian-DN mRNA的表达定位

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中国糖尿病杂志 2008年第10期16卷 586-588页

作者：王雪岷 y.j.kim R.S.Sherwin 解放军总医院内分泌科北京100853 美国耶鲁大学医学院内分泌学系

目的检测Kuzbanian显性失活(Kuz-DN)基因mRNA在转基因非肥胖型糖尿病(NOD)小鼠胰腺中的表达定位。方法转Kuz-DN基因的NOD小鼠8只,取胰腺,行冷冻与石蜡切片。用地高辛标记的Kuz-DN正义链及反义链cRNA探针,对组织切片进行原位杂交组织化... 详细信息

目的检测Kuzbanian显性失活(Kuz-DN)基因mRNA在转基因非肥胖型糖尿病(NOD)小鼠胰腺中的表达定位。方法转Kuz-DN基因的NOD小鼠8只,取胰腺,行冷冻与石蜡切片。用地高辛标记的Kuz-DN正义链及反义链cRNA探针,对组织切片进行原位杂交组织化学检测。结果在转基因阳性NOD小鼠胰腺组织中检测到强Kuz-DN mRNA信号。结论Kuz-DN mRNA在转基因动物模型定位、定性的实验结果,为Kuz基因改造后干预Notch/Delta信号传导途径,通过"旁侧抑制"影响细胞分化的基因治疗方案的研究提供了重要依据。

关键词： Kuzbanian基因小鼠,NOD 胰腺基因表达原位杂交组织化学

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Superplasticity of fine-grained Mg-10Li alloy prepared by severe plastic deformation and understanding its deformation mechanisms

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journal of Magnesium and Alloys 2024年第1期12卷 316-331页

作者： H.T.jeong S.W.Lee W.j.kim Department of Materials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

The superplastic behavior and associated deformation mechanisms of a fine-grained Mg-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with a grain size of 3.2μm,primarily composed of the BCCβphase and a small amount of the HCPαphase,were examined in a temperature range of 473 K to 623 *** microstructural refinement of this alloy was achieved by employing high-ratio differential speed *** best superplasticity was achieved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),where tensile elongations of 550±600%were *** the heating and holding stage of the tensile samples prior to tensile loading,a significant increase in grain size was observed at temperatures above 573 ***,it was important to consider this effect when analyzing and understanding the superplastic deformation behavior and *** the investigated strain rate range,the superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,while at high strain rates,lattice diffusion-controlled dislocation climb creep was the rate-controlling deformation *** was concluded that solute drag creep is unlikely to *** the late stages of deformation at 523 K,it was observed that grain boundary sliding led to the agglomeration of theαphase,resulting in significant strain *** mechanism maps were constructed forβ-Mg-Li alloys in the form of 2D and 3D formats as a function of strain rate,stress,temperature,and grain size,using the constitutive equations for various deformation mechanisms derived based on the data of the current tests.

关键词： Magnesium-lithium alloy Superplasticity Severe plastic deformation Grain size Grain growth

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先进稀薄氮氧化物控制的超稳定后处理系统的开发

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汽车与新动力 2020年第2期3卷 53-60页

作者： [韩]P.S.kim [韩]y.j.kim [韩]C.kim 闫红梅(译) 不详

选择性催化还原(SCR)催化剂与柴油颗粒过滤器(SDPF)的集成可能是满足即将出台的严格排放法规的最可行方法之一。菱沸石结构催化剂SSZ-13使得尿素SCR技术可广泛应用于汽车领域,与热稳定性较低的ZSM-5技术相比,其具有高达750℃的强大热稳... 详细信息

选择性催化还原(SCR)催化剂与柴油颗粒过滤器(SDPF)的集成可能是满足即将出台的严格排放法规的最可行方法之一。菱沸石结构催化剂SSZ-13使得尿素SCR技术可广泛应用于汽车领域,与热稳定性较低的ZSM-5技术相比,其具有高达750℃的强大热稳定性。然而,随着850℃老化时间增加,热稳定性较好的Cu-SSZ-13催化剂开始失去其初始活性,SDPF上的SCR催化剂可能在下降到怠速(DTI)条件下,当过滤器再生时暴露出来。因此,在汽车制造中强烈需要在更高温度下可存活、更耐用的SCR催化剂。最近研究发现,铜置换高二氧化硅(LTA)显示出优异的水热稳定性,有望成为能在下一代SDPF上应用的高品质候选材料,从而满足更严格的实际驾驶排放要求。900℃下水热老化12h后,在整个反应温度下,Cu/LTA催化剂上的氮氧化物(NOx)还原优于目前最高水平的Cu/SSZ-13商业催化剂。此外,由于NH3向NO的低氧化过程,Cu/LTA催化剂在620℃下贫/富循环老化后仍可以保持显著的高温NOx转化率。与Cu/SSZ-13相比,Cu/LTA在水热老化后具有更稳定的NH3存储能力,将为集成在车载尿素喷射控制以获得最大系统性能提供额外的益处。介绍了模拟动态全球统一轻型车辆测试循环模式下Cu/LTA催化剂的性能,这些增强功能将有助于在实际驾驶条件下改进未来的稀薄NOx后处理系统。

关键词：高效能柴油发动机减排催化剂水热稳定性

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冠状动脉钙化评分不能增加标准64层CT血管成像对疑有冠状动脉疾病的低风险病人的预后评估

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国际医学放射学杂志 2011年第3期 284-285页

作者： S.W.Kwon y.j.kim j.Shim j.M.Sung 赵芳 Divisions of Cardiology and Radiology Severance Cardiovascular Hospitaland Department of Research AffairsYonsei University College of Medicine

目的对疑有冠状动脉粥样硬化性心脏病(CAD)的低风险病人,心脏CT对主要不良心脏事件(MACE)诊断价值的评价。探讨冠状动脉钙化(CAC)评分和冠状动脉CT血管成

关键词：冠状动脉 CAC 血管成像 MACE CT 病人

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灌注偏度及峰度百分比变化:初诊为胶质母细胞瘤病人的早期治疗反应的一项潜在影像学生物指标

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国际医学放射学杂志 2012年第6期 581-582页

作者： H.j.Baek H.S.kim N.kim y.j.Choi y.j.kim 胡丽丽郭琪 Department of Radiology and Research Institute of Radiology University of Ulsan College of MedicineAsan medical Center86 Asan byeongwon-GilSongpa-GuSeoul 138-736Korea

摘要目的检测治疗早期正常脑血容量(nCBV)偏度及峰度变化对鉴别初诊为胶质母细胞瘤病人的早期肿瘤进展与假性进展的预测价值。材料与方法本回顾性研究经伦理委员会批准。本研究对135例初诊为胶质母细胞瘤且术后同时接受化疗和放疗(CCRT... 详细信息

摘要目的检测治疗早期正常脑血容量(nCBV)偏度及峰度变化对鉴别初诊为胶质母细胞瘤病人的早期肿瘤进展与假性进展的预测价值。材料与方法本回顾性研究经伦理委员会批准。本研究对135例初诊为胶质母细胞瘤且术后同时接受化疗和放疗(CCRT)的病人进行评估。

关键词：胶质母细胞瘤生物指标早期治疗假性进展病人峰度偏度反应

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Long-term olfactory loss post-COVID-19:Pathobiology and potential therapeutic strategies

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World journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 148-155页

作者： Sarah kim john B.Finlay Tiffany Ko Bradley j.Goldstein Department of Head and Neck Surgery&Communication Sciences Duke UniversityDurhamNorth CarolinaUSA Medical Scientist Training Program Duke UniversityDurhamNorth CarolinaUSA Department of Neurobiology Duke UniversityDurhamNorth CarolinaUSA

An acute loss of smell emerged as a striking symptom present in roughly half of the people infected with the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)virus in the early phases of the COVID-19 *** most COVID-19 patients,olfaction recovers over the course of a few ***,a lasting partial or complete loss of smell,often associated with distorted olfactory perceptions termed parosmia,has emerged as a widespread problem impacting at least 5%-10%of those who experience anosmia due to *** inability to offer effective therapies to this hyposmic or anosmic population,comprising millions of patients,highlights an enormous unmet need for the medical ***,we summarize the current understanding of the pathobiology causing acute olfactory loss due to SARS-CoV-2 infection,focusing on how the virus interacts with the peripheral olfactory system,a major site of viral *** also explore the problem of long-COVID olfactory dysfunction,which may accompany other persistent systemic disorders collectively termed postacute sequelae of ***,we discuss an emerging model focused on unresolved immune cell activity driving ongoing ***,we review current and future therapeutic approaches aimed at restoring olfactory function.

关键词： hyposmia inflammation long-COVID parosmia

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