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Journal of Magnesium and Alloys 2022年第6期10卷 1672-1679页

作者： Joo-hee kang Jiwon Park Kyung Song chang-Seok Oh Oleg Shchyglo Ingo Steinbach Korea Institute of Materials Science Changwon 51508Republic of Korea Interdisciplinary Centre for Advanced Materials Simulation Ruhr-University Bochum44801 BochumGermany

In this study the partially divorced eutectic microstructure ofα-Mg andβ-Mg17Al12was investigated by electron backscatter diffraction,transmission electron microscopy,and phase-field modeling in hypoeutectic Mg-Al *** orientation relationships between the individual eutecticαgrains,eutecticβphase,and primaryαgrains were *** the amount of eutectic morphology is primarily determined by the Al content,the in-depth microstructure analyses and the phase-field simulation suggest non-interactive nucleation and growth of eutecticαphase in theβphase grown on the interdendritic primaryα***,phase-field simulations showed a preferred nucleation sequence where theβphase nucleates first and subsequently triggers the nucleation of eutecticαphase at the movingβphase solidification front,which supports the microstructural analysis results.

关键词： Mg-Al alloy Partially divorced eutectic Solidification Electron backscatter diffraction Phase-Field modeling

Effects of Dropsonde Data in Field Campaigns on Forecasts of Tropical Cyclones over the Western North Pacific in 2020 and the Role of CNOP Sensitivity

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Advances in Atmospheric Sciences 2023年第5期40卷 791-803页

作者： Xiaohao QIN Wansuo DUAN Pak-Wai chan Boyu CHEN kang-Ning HUANG State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China Hong Kong Observatory Hong KongChina Weather Forecasting Office National Meteorological CenterChina Meteorological AdministrationBeijing 100081China Research and Development Center Central Weather BureauTaipei 100006China

Valuable dropsonde data were obtained from multiple field campaigns targeting tropical cyclones,namely Higos,Nangka,Saudel,and Atsani,over the western North Pacific by the Hong Kong Observatory and Taiwan Central Weather Bureau in *** conditional nonlinear optimal perturbation(CNOP)method has been utilized in real-time to identify the sensitive regions for targeting observations adhering to the procedure of real-time field campaigns for the first *** observing system experiments were conducted to evaluate the effect of dropsonde data and CNOP sensitivity on TC forecasts in terms of track and intensity,using the Weather Research and Forecasting *** is shown that the impact of assimilating all dropsonde data on both track and intensity forecasts is ***,assimilation using only the dropsonde data inside the sensitive regions displays unanimously positive effects on both the track and intensity forecast,either of which obtains comparable benefits to or greatly reduces deterioration of the skill when assimilating all dropsonde ***,these results encourage us to further carry out targeting observations for the forecast of tropical cyclones according to CNOP sensitivity.

关键词： tropical cyclones targeting observation field campaign CNOP sensitivity dropsonde intensity forecasts

The role of extracellular vesicles in animal reproduction and diseases

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Journal of Animal Science and Biotechnology 2022年第6期13卷 1634-1656页

作者： Sangiliyandi Gurunathan Min-hee kang Hyuk Song Nam Hyung Kim Jin-Hoi Kim Department of Stem Cell and Regenerative Biotechnology Konkuk UniversitySeoul 05029Korea Guangdong Provincial Key Laboratory of Large Animal models for Biomedicine Wuyi UniversityJiangmen 529020China

Extracellular vesicles(EVs)are nanosized membrane-enclosed compartments that serve as messengers in cell-to-cell communication,both in normal physiology and in pathological *** can transfer functional proteins and genetic information to alter the phenotype and function of recipient cells,which undergo different changes that positively affect their structural and functional *** fluids are enriched with several subpopulations of EVs,including exosomes,microvesicles(MVs),and apoptotic bodies carrying several cargoes,such as lipids,proteins,and nucleic *** associated with the reproductive system are actively involved in the regulation of different physiological events,including gamete maturation,fertilization,and embryo and fetal *** can influence follicle development,oocyte maturation,embryo production,and endometrial-conceptus *** loaded with cargoes are used to diagnose various diseases,including pregnancy disorders;however,these are dependent on the type of cell of origin and pathological ***-derived microRNAs(miRNAs)and proteins in the placenta regulate inflammatory responses and trophoblast invasion through intercellular delivery in the placental *** review presents evidence regarding the types of extracellular vesicles,and general aspects of isolation,purification,and characterization of EVs,particularly from various types of ***,we discuss EVs as mediators and messengers in reproductive biology,the effects of EVs on placentation and pregnancy disorders,the role of EVs in animal reproduction,in the male reproductive system,and mother and embryo *** addition,we emphasize the role of microRNAs in embryo implantation and the role of EVs in reproductive and therapeutic ***,we discuss the future perspectives of EVs in reproductive biology.

关键词： Embryos Extracellular vesicles Implantation MicroRNA Pregnancy disorders

An investigation of machine learning techniques to estimate minimum horizontal stress magnitude from borehole breakout

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International Journal of Mining Science and Technology 2022年第5期32卷 1021-1029页

作者： Huasheng Lin Sarvesh Kumar Singh Zizhuo Xiang Won hee kang Simit Raval Joung Oh Ismet Canbulat Glencore Coal Assets Australia Mount Thorley 2330Australia School of Minerals and Energy Resources Engineering University of New South WalesSydney 2052Australia Centre for Infrastructure Engineering School of EngineeringWestern Sydney UniversityPenrith 2751Australia

Borehole breakout is a widely utilised phenomenon in horizontal stress orientation determination,and breakout geometrical parameters,such as width and depth,have been used to estimate both horizontal stress ***,the accuracy of minimum horizontal stress estimation from borehole breakout remains relatively low in comparison to maximum horizontal stress *** paper aims to compare and improve the minimum horizontal stress estimation via a number of machine learning(ML)regression techniques,including parametric and non-parametric models,which have rarely been *** models were trained based on 79 laboratory data from published literature and validated against 23 field data.A systematic bias was observed in the prediction for the validation dataset whenever the horizontal stress value exceeded the maximum value in the training ***,the pattern was captured,and the removal of systematic bias showed that the artificial neural network is capable of predicting the minimum horizontal stress with an average error rate of 10.16%and a root mean square error of 3.87 MPa when compared to actual values obtained through conventional in-situ measurement *** is a meaningful improvement considering the importance of in-situ stress knowledge for underground operations and the availability of borehole breakout data.

关键词： Borehole breakout In-situ stress estimation Comparative analysis Machine learning

老年患者耐碳青霉烯类鲍曼不动杆菌血流感染的危险因素和病死率:一项为期十年的回顾性研究

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中国感染控制杂志 2024年第2期23卷 155-161页

作者：薛野邹超世李泰阶覃美香梁婵刘康海丘丹萍玉林市第一人民医院检验科广西玉林537035 广西医科大学附属武鸣医院医学检验科广西南宁530199

目的评估老年患者发生耐碳青霉烯类鲍曼不动杆菌(CRAB)血流感染和28天短期死亡相关的危险因素,为预防和治疗CRAB血流感染提供依据。方法回顾性分析玉林市某医院2013年1月—2022年12月确诊为鲍曼不动杆菌血流感染且年龄≥60岁的老年患... 详细信息

目的评估老年患者发生耐碳青霉烯类鲍曼不动杆菌(CRAB)血流感染和28天短期死亡相关的危险因素,为预防和治疗CRAB血流感染提供依据。方法回顾性分析玉林市某医院2013年1月—2022年12月确诊为鲍曼不动杆菌血流感染且年龄≥60岁的老年患者临床资料,包括患者人口统计学、微生物学相关特征及临床结局等数据。选取单变量分析有意义的变量进行二元logistic回归模型和Cox比例风险模型多变量分析,进一步确定感染的独立危险因素,采用Kaplan-Meier曲线进行生存分析。结果共150例患者纳入研究,其中CRAB血流感染16例,占10.7%,碳青霉烯类敏感鲍曼不动杆菌(CSAB)血流感染134例。老年患者鲍曼不动杆菌血流感染28天短期病死率为15.3%(23/150,95%CI:9.6%~21.1%),其中CRAB血流感染短期病死率(56.3%,9/16)高于CSAB(10.4%,14/134)。深静脉置管(OR:15.598,95%CI:1.831~132.910)和合并其他部位感染(OR:15.449,95%CI:1.497~159.489)与老年患者发生CRAB血流感染相关。老年患者鲍曼不动杆菌血流感染28天死亡的独立危险因素为血液透析(OR:11.856,95%CI:2.924~48.076)、入住重症监护病房(OR:9.387,95%CI:1.941~45.385)和肺部感染为菌血症可疑来源(OR:7.019,95%CI:1.345~36.635)。结论老年患者合并其他部位感染和深静脉置管与CRAB血流感染的发生相关。血液透析、入住重症监护病房和肺部感染为菌血症可疑来源是影响老年患者鲍曼不动杆菌血流感染预后的独立危险因素。

关键词：老年患者血流感染耐碳青霉烯类鲍曼不动杆菌死亡危险因素

Improving ionic conductivity of von-Alpen-type NASICON ceramic electrolytes via magnesium doping

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Journal of Advanced Ceramics 2023年第5期12卷 1058-1066页

作者： Il-Seop Jang Wooseok Go Bo-Ye Song Hayoung Park Yun chan kang Jinyoung Chun Emerging Materials R&D Division Korea Institute of Ceramic Engineering and Technology(KICET)Jinju 52851Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea Energy Storage and Distribution Resources Division Lawrence Berkeley National LaboratoryBerkeley 94720USA

NASICON (sodium (Na) superionic conductor) compounds have attracted considerable attention as promising solid electrolyte materials for advanced Na-based batteries. In this study, we investigated the improvement in ionic conductivities of von-Alpen-type NASICON (vA-NASICON) ceramic electrolytes by introducing a magnesium ion (Mg^(2+)) as a heterogeneous element. The optimal Mg-doped vA-NASICON exhibited a high ionic conductivity of 3.64×10^(−3) S·cm^(−1), which was almost 80% higher than that of un-doped vA-NASICON. The changes in physicochemical properties of the vA-NASICONs through the Mg introduction were systematically analyzed, and their effects on the ionic conductivities of the vA-NASICON were studied in detail. When the optimal ratio of Mg^(2+) was used in a synthetic process, the relative density (96.6%) and grain boundary ionic conductivity (σgb) were maximized, which improved the total ionic conductivity (σt) of the vA-NASICON. However, when Mg^(2+) was introduced in excess, the ionic conductivity decreased because of the formation of an undesired sodium magnesium phosphate (NaxMgyPO_(4)) secondary phase. The results of this study are expected to be effectively applied in the development of advanced sodium-based solid electrolytes with high ionic conductivities.

关键词： NASICON solid electrolyte von-Alpen-type magnesium(Mg)doping ionic conductivity

Late Pleistocene spore-pollen record and climatic change at the Chongphadae Cave Site,Democratic People's Republic of Korea

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Journal of Palaeogeography 2023年第4期12卷 624-636页

作者： Se chan Kim Rye Sun Choe Il Nam Kim Chol U Ryong Il kang Institute of Human Evolution and Development History Faculty of HistoryKim Il Sung UniversityTaesong DistrictPyongyangDemocratic People's Republic of Korea

We present a detailed pollen record and interpretations of late Pleistocene climatic change at the Chongphadae Cave Site, Democratic People's Republic of Korea. The mean annual paleotemperature and mean annual paleoprecipitation of the site were calculated using the temperature index and precipitation index based on ecological features and geographical distribution of each taxon. Temperature index and precipitation index range from 8.8℃ to 10.4℃ and from 805.0 mm to 963.1 mm, respectively. Four dates(radiocarbon, uranium series, fission track, and paleomagnetic excursion dating) of the deposit profile investigated yield a range of ~21.3 ka BP to ~117 ka BP, geochronologically corresponding to the late Pleistocene, and extend from the last interglacial highstand through the Last Glacial Maximum. Our results are thus consistent with the climatic shift from interglacial to glacial conditions, provide evidence that the environments of the region, which was reconstructed from the paleoclimatic index, changed from a mild and humid to a cool and dry climate during the late Pleistocene, and suggest trends similar to those of several parts of the Northern Hemisphere which lie in the same latitudinal zone as our study area.

关键词： Chongphadae cave Pollen Climatic change Late Pleistocene Mean annual temperature Mean annual precipitation

Incidental accumulation of Technetium-99m pertechnetate in subacute cerebral infarction: A case report

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World Journal of Clinical Cases 2022年第23期10卷 8400-8405页

作者： Yeon-hee Han Hwan-Jeong Jeong Hyun Goo kang Seok Tae Lim Department of Nuclear Medicine Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University HospitalJounbuk National University Medical School and HospitalJeonju 54907JeonbukSouth Korea Department of Neurology Jeonbuk National University Medical School and HospitalJeonju 54907JeonbukSouth Korea

BACKGROUND When interpreting nuclear medicine images,unexpected findings are sometimes *** these findings and determining the mechanism of their occurrence could have a significant impact on early diagnosis of critical diseases and the appropriate management of *** SUMMARY A 59-year-old man was admitted to the emergency room due to left hemiparesis,left hemifacial palsy,and mild *** 2 wk of hospitalization,the patient complained of dry eyes and ***,salivary scintigraphy was performed to evaluate the functional status of his salivary *** accumulation in the right frontoparietal area was found on salivary ***-attenuated inversion recovery phase magnetic resonance(FLAIR phase MR)image showed diffuse high signal intensity in the same *** and posterior horns of the right lateral ventricle were obliterated and the midline was slightly shifted to the left side due to right frontoparietal *** salivary scintigraphy,Tc-99m pertechnetate was incidentally accumulated in a subacute cerebral infarction *** years after the diagnosis of acute infarction,the second series of salivary scintigraphy showed no abnormal activity in the *** phase MR image also demonstrated markedly decreased high signal intensity in the previous infarction lesion without evidence of swelling indicating chronic cerebral *** This case highlights that Tc-99m pertechnetate could accumulate in a subacute cerebral infarction *** mechanism of an unexpected uptake of Tc-99m pertechnetate in unusual sites should be evaluated and kept in mind for better interpretation.

关键词： Cerebral infarction Tc-99m pertechnetate Salivary scintigraphy Case report

Primary duodenal dedifferentiated liposarcoma:A case report and literature review

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World Journal of Clinical Cases 2022年第6期10卷 2007-2014页

作者： Nah Ihm Kim Ji Shin Lee chan Choi Jong hee Nam Yoo Duk Choi hee Joon Kim Sung Sun Kim Department of Pathology Chonnam National University HospitalGwangju 61469South Korea Department of Pathology Chonnam National University Hwasun HospitalHwasun 58128South Korea Department of Surgery Chonnam National University HospitalGwangju 61469South Korea

BACKGROUND Dedifferentiated liposarcoma(DDLPS)is an extremely rare neoplasm that exhibits various *** tumor is characterized by immunoreactivity to MDM2 and CDK4 and can be confirmed by detecting MDM2 amplification via fluorescence in situ hybridization(FISH).Herein,we report an unusual case of DDLPS arising from the *** SUMMARY A 64-year-old man presented with repeated abdominal pain and weight *** studies revealed a mass of the duodenum involving the *** patient was treated with pylorus-preserving ***,the tumor showed a high-grade *** demonstrated that the tumor cells were positive for MDM2 and CDK4 ***2 amplification was detected via FISH,leading to the final diagnosis of *** surgery,the patient was treated in the intensive care unit due to peritonitis,and died 60 d after *** To the best of the authors’knowledge,this is the first case of primary duodenal DDLPS in Korea and the third case in the English-language *** must be taken not to misdiagnose DDLPS as another high-grade *** should be in the differential diagnosis list.

关键词： Liposarcoma Primary Small bowel Duodenum Immunohistochemistry Case report

3D Face Reconstruction from a Single Image Using a Combined PCA-LPP Method

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Computers, Materials & Continua 2023年第3期74卷 6213-6227页

作者： Jee-Sic Hur Hyeong-Geun Lee Shinjin kang Yeo chan Yoon Soo Kyun Kim Department of Computer Engineering Jeju National UniversityJeju63243Korea School of Games Hongik UniversitySejong30016Korea Department of Artificial Intelligence Jeju National UniversityJeju63243Korea

In this paper, we proposed a combined PCA-LPP algorithm toimprove 3D face reconstruction performance. Principal component analysis(PCA) is commonly used to compress images and extract features. Onedisadvantage of PCA is local feature loss. To address this, various studies haveproposed combining a PCA-LPP-based algorithm with a locality preservingprojection (LPP). However, the existing PCA-LPP method is unsuitable for3D face reconstruction because it focuses on data classification and *** the existing PCA-LPP, the adjacency graph, which primarily shows the connectionrelationships between data, is composed of the e-or k-nearest neighbortechniques. By contrast, in this study, complex and detailed parts, such aswrinkles around the eyes and mouth, can be reconstructed by composing thetopology of the 3D face model as an adjacency graph and extracting localfeatures from the connection relationship between the 3D model *** verified the effectiveness of the proposed method. When theproposed method was applied to the 3D face reconstruction evaluation set,a performance improvement of 10% to 20% was observed compared with theexisting PCA-based method.

关键词： Principal component analysis locality preserving project 3DMM face reconstruction face modeling