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Measuring Community Resilience During the COVID-19 Based on Community Wellbeing and Resource Distribution

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Journal of Social Computing 2022年第4期3卷 322-344页

作者： Jaber Valinejad Zhen Guo Jin-hee cho Ing-Ray chen the Data and System Science Lab Harvard Medical SchoolHarvard UniversityCambridgeMA 01451USA. Department of Computer Science Virginia TechNational Capital Region CampusFalls ChurchVA 22043USA.

The COVID-19 pandemic has severely harmed every aspect of our daily lives,resulting in a slew of social ***,it is critical to accurately assess the current state of community functionality and resilience under this pandemic for successful *** this end,various types of social sensing tools,such as tweeting and publicly released news,have been employed to understand individuals’and communities’thoughts,behaviors,and attitudes during the COVID-19 ***,some portions of the released news are fake and can easily mislead the community to respond improperly to disasters like *** paper aims to assess the correlation between various news and tweets collected during the COVID-19 pandemic on community functionality and *** use fact-checking organizations to classify news as real,mixed,or fake,and machine learning algorithms to classify tweets as real or fake to measure and compare community resilience(CR).Based on the news articles and tweets collected,we quantify CR based on two key factors,community wellbeing and resource distribution,where resource distribution is assessed by the level of economic resilience and community *** on the estimates of these two factors,we quantify CR from both news articles and tweets and analyze the extent to which CR measured from the news articles can reflect the actual state of CR measured from *** improve the operationalization and sociological significance of this work,we use dimension reduction techniques to integrate the dimensions.

关键词： community resilience social computing data science fake news social media urban computing computational social science machine learning

Change in subfoveal choroidal thickness after argon laser panretinal photocoagulation

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International Journal of Ophthalmology(English edition) 2013年第4期6卷 505-509页

作者： Ga Eun cho hee Yun cho Yun Taek Kim Department of Ophthalmology Ewha Womans University School of Medicine Department of Ophthalmology Hanyang University School of Medicine

AIMTo evaluate changes in subfoveal choroidal thickness (SFCT) and macular thickness as measured by enhanced depth imaging spectral-domain optical coherence tomography (EDI-OCT) after argon laser panretinal photocoagu... 详细信息

关键词： choroidal thickness diabetic retinopathy EDI-OCT macular edema panretinal photocoagulation

Two-stage dynamic recrystallization and texture evolution in Al-7Mg alloy during hot torsion

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1900-1911页

作者： Kwang Tae Son Chang hee cho Myoung Gyun Kim Ji Woon Lee School of Mechanical Industrialand Manufacturing EngineeringOregon State UniversityCorvallis OR 97331USA Department of Materials Science Engineering Northwestern UniversityEvanston IL 60208USA Research Institute of Industrial Science and Technology(RIST) Pohang 37673Rep.of Korea Division of Advanced Materials Engineering Kongju National UniversityCheonan 31080Rep.of Korea Center for Advanced Materials and Parts of Powders Kongju National UniversityCheonan 31080Rep.of Korea

Hot torsion tests were performed on the Al-7Mg alloy at the temperature ranging from 300 to 500℃ and strain rates between 0.05 and 5 s^(-1) to explore the progressive dynamic recrystallization(DRX)and texture *** DRX behavior of the alloy manifested two distinct stages:Stage 1 at strain of≤2 and Stage 2 at strains of≥*** Stage 1,there was a slight increase in the DRXed grain fraction(X_(DRX))with predominance of discontinuous DRX(DDRX),followed by a modest change in X_(DRX) until the transition to Stage *** 2 was marked by an accelerated rate of DRX,culminating in a substantial final X_(DRX) of~*** backscattered diffraction(EBSD)analysis on a sample in Stage 2 revealed that continuous DRX(CDRX)predominantly occurred within the(121)[001]grains,whereas the(111)[110]grains underwent a geometric DRX(GDRX)evolution without a noticeable sub-grain ***,a modified Avrami’s DRX kinetics model was utilized to predict the microstructural refinement in the Al-7Mg alloy during the DRX *** this kinetics model did not accurately capture the DDRX behavior in Stage 1,it effectively simulated the DRX rate in Stage *** texture index was employed to assess the evolution of the texture isotropy during hot-torsion test,demonstrating significant improvement(>75%)in texture randomness before the commencement of Stage *** initial texture evolution is attributed to the rotation of parent grains and the substructure evolution,rather than to an increase in X_(DRX).

关键词： Al-7Mg alloys hot deformation hot torsion tests dynamic recrystazlliation microstructure texture

Enhancing ammonia production rates from electrochemical nitrogen reduction by engineering three-phase boundary with phosphorus-activated Cu catalysts

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Journal of Energy Chemistry 2023年第9期84卷 394-401页

作者： Jeehye Kim cho hee Lee Yong Hyun Moon Min hee Lee Eun Hyup Kim Sun hee choi Youn Jeong Jang Jae Sung Lee School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Department of Chemical Engineering Hanyang UniversitySeoul 04763Republic of Korea Pohang Accelerator Laboratory(PAL) Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea

Electrochemical N_(2) reduction reaction(eNRR) over Cu-based catalysts suffers from an intrinsically low activity of Cu for activation of stable N_(2) molecules and the limited supply of N_(2) to the catalyst due to its low solubility in aqueous ***,we propose phosphorus-activated Cu electrocatalysts to generate electron-deficient Cu sites on the catalyst surface to promote the adsorption of N_(2) *** eNRR system is further modified using a gas diffusion electrode(GDE) coated with polytetrafluoroethylene(PTFE) to form an effective three-phase boundary of liquid water-gas N_(2)-solid catalyst to facilitate easy access of N_(2) to the catalytic *** a result,the new catalyst in the flow-type cell records a Faradaic efficiency of 13.15% and an NH_(3) production rate of 7.69 μg h^(-1) cm^(-2) at-0.2 V_(RHE),which represent 3.56 and 59.2 times increases from those obtained with a pristine Cu electrode in a typical electrolytic *** work represents a successful demonstration of dual modification strategies;catalyst modification and N_(2) supplying system engineering,and the results would provide a useful platform for further developments of electrocatalysts and reaction systems.

关键词： Electrochemical nitrogen reduction reaction Ammonia production Phosphorous modified copper electrodes Gas diffusion electrodes Three-phase boundary PTFE coating

Atomic Diffusion in Cu/Si （111） and Cu/SiO2/Si （111） Systems by Neutral Cluster Beam Deposition

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Chinese Physics Letters 2008年第4期25卷 1400-1402页

作者：曹博李公平陈熙萌 cho Seong—Jin KIM hee School of Nuclear Science and Technology Lanzhou University Lanzhou 730000 Department of physics Kyungsung University Pusan 608-736 South Korea

The Cu films are deposited on two kinds of p-type Si （111） substrates by ionized duster beam （ICB） technique. The interface reaction and atomic diffusion of Cu/Si （111） and Cu/SiO2/Si （111） systems are studied at different annealing temperatures by x-ray diffraction （XRD） and Rutherford backscattering spectrometry （RBS）. Some significant results are obtained： For the Cu/Si （111） samples prepared by neutral dusters, the interdiffusion of Cu and Si atoms occurs when annealed at 230℃. The diffusion coefficients of the samples annealed at 230℃ and 500℃ are 8.5 ×10^-15 cm^2.s^-1 and 3.0 ×10^-14 cm^2.s^-1, respectively. The formation of the copper-silicide phase is observed by XRD, and its intensity becomes stronger with the increase of annealing temperature. For the Cu/SiO2//Si （111） samples prepared by neutral dusters, the interdiffusion of Cu and Si atoms occurs and copper silicides are formed when annealed at 450℃. The diffusion coefficients of Cu in Si are calculated to be 6.0 ×10^-16 cm^2.s^-1 at 450℃, due to the fact that the existence of the SiO2 layer suppresses the interdiffusion of Cu and Si.

关键词： supernova explosion proto-neutron star shock wave

Obesity promotes oxidative stress and exacerbates blood-brain barrier disruption after high-intensity exercise

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Journal of Sport and Health Science 2017年第2期6卷 225-230页

作者： hee-Tae Roh Su-Youn cho Wi-Young So Department of Physical Education Dong-A University Busan 604-714 Republic of Korea School of Taekwondo College of Creative Human ResourcesYoungsan UniversityYangsan-si 626-790Republic of Korea Sports and Health Care Major College of Humanities and ArtsKorea National University of TransportationChungju-si 380-702Republic of Korea

Purpose: The purpose of this study was to investigate the effects of obesity and high-intensity acute exercise on oxidant-antioxidant status,neurotrophic factor expression, and blood-brain barrier(BBB) ***: Twenty-four healthy, untrained men(12 non-obese(mean 14.9% body fat) and 12 obese subjects(mean 29.8% body fat)) performed20 min of continuous submaximal aerobic exercise at 85% maximal oxygen consumption. Blood sampling was performed to examine the oxidant-antioxidant status(reactive oxygen species(ROS) and superoxide dismutase(SOD)), neurotrophic factors(brain-derived neurotrophic factor(BDNF) and nerve growth factor(NGF)), and BBB disruption(S100β and neuron-specific enolase) before and after acute ***: The obese group showed significantly higher pre-exercise serum ROS levels and significantly lower pre-exercise serum SOD levels than the non-obese group(p < 0.05). Serum ROS, SOD, BDNF, NGF, and S100β levels were significantly increased post-exercise compared with pre-exercise levels in both the non-obese and the obese groups(p < 0.05). The obese group showed significantly higher serum ROS, BDNF, NGF,and S100β levels post-exercise compared to the non-obese group(p < 0.05).Conclusion: Our study suggests that episodic vigorous exercise can increase oxidative stress and blood neurotrophic factor levels and induce disruption of the BBB. Moreover, high levels of neurotrophic factor in the blood after exercise in the obese group may be due to BBB disruption,and it is assumed that oxidative stress was the main cause of this BBB disruption.

关键词： Antioxidant enzyme Blood-brain barrier Exercise Neurotrophic factor Obesity Oxidative stress

Septic shock due to Granulicatella adiacens after endoscopic ultrasound-guided biopsy of a splenic mass:A case report

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World Journal of Gastroenterology 2021年第8期27卷 751-759页

作者： Seo-Yeon cho Eunae cho Chang-Hwan Park hee-Joon Kim Joo-Yeon Koo Division of Gastroenterology Department of Internal MedicineChonnam National University HospitalGwangju 61469South Korea Department of Surgery Chonnam National University HospitalGwangju 61469South Korea Department of Pathology Chonnam National University HospitalGwangju 61469South Korea

BACKGROUND Endoscopic ultrasound-guided fine needle aspiration or biopsy(EUS-FNA or FNB)has become a popular method for diagnosing various lesions of the gastrointestinal tract and surrounding tissue due to the accuracy and *** the best of our knowledge,no case report of severe infection after EUS-FNB of a solid lesion in the spleen has been ***,we report a rare case of septic shock after EUS-FNB of a splenic *** SUMMARY A 45-year-old male patient presented to the outpatient clinic due to an incidentally detected splenic mass.A definitive diagnosis could not be established based on the abdominal magnetic resonance *** of the spleen showed a 6 cm-sized,relatively well-demarcated,heterogeneous mass,and EUS-FNB with a 22G needle was *** days after the procedure patient developed septic shock and a splenic abscess was *** culture revealed growth of Granulicatella *** the treatment with antibiotics the patient underwent surgical resection,and the pathological examination showed diffuse large B-cell *** patient received chemotherapy and he is in complete *** Infection of a splenic mass after EUS-FNB is a rare complication and prophylactic antibiotics might be considered.

关键词： Endoscopic ultrasound Endoscopic ultrasound-guided fine needle biopsy Splenic neoplasms Lymphoma Septic shock Case report

Diffusion and Interface Reaction of Cu/Si(100)Films Prepared by Cluster Beam Deposition

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Chinese Physics Letters 2011年第3期28卷 66-69页

作者： GAO Xing-Xin JIA Yan-Hui LI Gong-Ping cho Seong-Jin KIM hee School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000 Department of physics Kyungsung UniversityPusan 608-736South Korea

Cu thin films are deposited on Si(100)substrates by neutral cluster beams and ionized cluster *** atomic diffusion and interface reaction between the Cu films and the Si substrates of as-deposited and annealed at different temperatures(230℃,450℃,500℃and 600℃)are investigated by Rutherford backscatteringspectrometry(RBS)and x-ray diffraction(XRD).Some significant results are obtained on the following aspects:(1)For the Cu/Si(100)samples prepared by neutral cluster beams and ionized cluster beams at V_(a)=0 kV,atomic diffusion phenomena are observed clearly in the as-deposited *** the increase of annealing temperature,the interdiffusion becomes more ***,the diffusion intensities of the RBS spectra of the Cu/Si(100)films using neutral cluster beams are always higher than that of the Cu/Si(100)films using ionized cluster beams at V_(a)=OkV in the as-deposited and samples annealed at the same *** compound of Cu3Si is observed in the as-deposited samples.(2)For the Cu/Si(100)samples prepared by ionized cluster beams at V_(a)=1,3,5 kV,atomic diffusion phenomena are observed in the as-deposited samples at V_(a)=1,5 *** the samples prepared at V_(a)=3 kV,the interdiffusion phenomenon is observed until 500℃annealing *** reason for the difference is discussed.

关键词： temperature diffusion cluster

A pilot study of single-use endoscopy in screening acute gastrointestinal bleeding

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World Journal of Gastroenterology 2013年第1期19卷 103-107页

作者： Jae hee cho hee Man Kim Sangheun Lee Yu Jin Kim Ki Jun Han Hyeon Geun cho Si Young Song Division of Gastroenterology Department of Internal MedicineMyongji HospitalKwandong University College of MedicineGoyang 412-270South Korea Department of Internal Medicine Graduate SchoolYonsei University College of MedicineSeoul 120-752South Korea Division of Gastroenterology Department of Internal MedicineBrain Korea 21 Project for Medical ScienceSeverance Biomedical Science InstituteYonsei University College of MedicineSeoul 120-752South Korea

AIM:To investigate the feasibility of a single-use endoscopy as an alternative procedure to nasogastric lavage in patients with acute gastrointestinal(GI) ***:Patients who presented with hematemesis,melena or hematochezia were enrolled in this *** scan and conventional esophagogastroduodenoscopy(EGD) were subsequently *** bleeding was defined as blood in the stomach,and inactive bleeding was defined as coffee ground clots and clear fluid in the *** findings were recorded and ***:Between January and March,2011,13 patients that presented with hematemesis(n = 4),melena(n = 6),or bleeding from a previous nasogastric feeding tube(n = 3),were enrolled in this *** 12 patients with upper GI bleeding,the EG scan device revealed that 7 patients had active bleeding and 5 patients had inactive bleeding,whereas conventional EGD revealed that 8 patients had active bleeding and 4 patients had inactive *** sensitivity and specificity of the EG scan device was 87.5% and 100% for active bleeding,with conventional EGD serving as a *** complication were reported during the EG scan ***:The EG scan is a feasible device for screening acute upper GI *** may replace nasogastric lavage for the evaluation of acute upper GI bleeding.

关键词： Gastrointestinal hemorrhage Bleeding Endoscopy Nasogastric tube Lavage