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Chronic subdural haematoma during the COVID-19 lockdown period:late presentation with a longer interval from the initial head injury to the final presentation and diagnosis

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Chinese Neurosurgical Journal 2022年第1期8卷 31-35页

作者： David Yuen Chung Chan Wai Sang Poon danny Tat Ming Chan Wai Kit Mak George Kwok Chu Wong Division of Neurosurgery Department of SurgeryFaculty of MedicineThe Chinese University of Hong KongPrince of Wales HospitalHong Kong SARChina

Background:The COVID-19 novel coronavirus is contagious,and the mortality is higher in the elderly *** in different parts of the world has been imposed since January *** subdural haematoma (cSDH) has a unique natural history in which symptoms can be non-specific,and the onset is *** study aims to evaluate the impact of the COVID-19 pandemic on the presentation of ***:Consecutive adult cSDH patients admitted from 1 March 2020 to 30 April 2020 were *** criteria including those who had no definite history of head injury or the diagnosis of cSDH were made from a scheduled follow-up *** data during the same period in 2019 were reviewed for *** primary outcome was the interval between the initial head injury and the final radiological diagnosis of *** outcomes include Markwalder chronic subdural haematoma grade upon admission,length of stay in the acute hospital,and the modified Rankin scale (mRS) upon ***:For the primary outcome,the average interval between head injury and the diagnosis of cSDH was significantly longer at 56.6 days (49 to 74 days,SD 9.83 days) during the period from March to April 2020,versus 29.4 days (17 to 42 days,SD 8.59 days) in 2019 for the corresponding period (p = 0.00703).There was no significant difference in the functional outcome upon ***:cSDH patients can present late during the COVID-19 lockdown *** functional outcome was comparable when operations for drainage were timely performed.

关键词： Chronic subdural haematoma Novel coronavirus COVID-19 Head injury

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Book review of Mechanics of Bio-Sediment Transport, Hongwei Fang, Lei Huang, Huiming Zhao, Wei Cheng, Yishan Chen, Mehdi Fazeli, Qianqin Shang (Eds.). Springer-Verlag, Berlin Heidelberg (2020)

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International Journal of Sediment Research 2021年第1期36卷 161-162页

作者： danny D.Reible Donovan Maddox Distinguished Engineering Chair Paul Whitfield Horn ProfessorTexas Tech University

Sediment transport is a classical subject in hydraulic engineering,and relevant to fluvial processes,flood control,reservoir operation,and river *** sediment dynamics studies started in the early 20 th century by scie...

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音乐表演速度分析的意义与理论

中央音乐学院学报 2023年第1期 43-53页

作者：周全中央音乐学院音乐学系

一直以来,乐谱都是音乐分析的基础,基于乐谱的分析是音乐学者解读作曲家意图和解释作品结构的主要途径。然而,许多近期的研究发现,乐谱中的记号与实际演奏中发出的声音相差甚远,导致传统的音乐分析不能够全面、完整地解释音乐的内容和... 详细信息

一直以来,乐谱都是音乐分析的基础,基于乐谱的分析是音乐学者解读作曲家意图和解释作品结构的主要途径。然而,许多近期的研究发现,乐谱中的记号与实际演奏中发出的声音相差甚远,导致传统的音乐分析不能够全面、完整地解释音乐的内容和结构。诸多例子表明,速度在对音乐结构的分析中发挥着重要的作用。因此,在音乐分析的过程中,应该纳入更多表演特征的分析,尤其是对于速度的分析。音乐学者需要一套关于速度分析的理论框架,以便更全面、深入地分析演奏中的速度和速度变化。这套框架可以为音乐分析提供更有效的方法和更扎实的理论基础。

关键词：音乐表演研究表演理论速度分析音乐结构

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How I became a statistician — thank you speech at birthday dinner

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Statistical Theory and Related Fields 2018年第2期2卷 222-224页

作者： danny Pfeffermann National Statistician and Director Central Bureau of StatisticsIsraelHebrew University of JerusalemIsraelUniversity of SouthamptonUK

This speech was delivered at the Banquet and Award Ceremony June 17, 2018, during SAE 2018– an international conference on ‘Small Area Estimation and Other Topics of Current Interest inSurveys, Official Statistics, ... 详细信息

关键词： dinner thank speech

Simulation and animation model to boost mining efficiency and enviro-friendly in multi-pit operations

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International Journal of Mining Science and Technology 2015年第4期25卷 671-674页

作者： Tarshizi Ebrahim Sturgul John Ibarra Virginia Taylor danny Mining & Metallurgical Engineering Department University of Nevada Reno School of Civil Environmental and Mining Engineering University of Adelaide

A discrete-event system simulation and animation program was developed to enhance the efficiency of a truck-excavator operation and reduce the environmental impact of haulage in an open-cut coal mine with multiple-pit operations. In any mine, a key objective is to have sufficient equipment for production and not to have excess to where it becomes counterproductive. Due to the advent of responsible mining,environmental regulations, and eco-friendly practices, these factors must also be considered in the analysis. Simulation studies can be financially advantageous for both the optimization of existing mine operations and new development phases in a mine. This study is a new approach to use discrete-event system simulation for mine systems, in order to investigate and possibly reduce environmental impact considering mining haulage performance and production target. A hypothetical layout of a surface coal mine with two pit operations was used for the simulation and animation model. The simulation model includes the animation of the operation. Animation is helpful to enhance the benefit of a mine simulation model. GPSS/Hòand Proof Professionalòwere the software used for the investigation.

关键词：离散事件系统仿真动画模型环境友好挖掘机操作矿井作业生态环境保护生产设备

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The effects of adsorptive materials on microbial community composition and PAH degradation at the sediment capewater interface

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International Journal of Sediment Research 2021年第4期36卷 555-565页

作者： Giovanna Pagnozzi danny D.Reible Kayleigh Millerick Civil Environmental and Construction Engineering Texas Tech University Geosyntec Consultants

Capping with layers of inert or adsorptive materials is used to control the release of polycyclic aromatic hydrocarbons(PAH) in sediment but little is known about microbial degradation processes in these materials. A rich native microbial community inhabits the sediment bed, and capping media can influence enrichment and biodegradation activity of benthic microorganisms. The aim of this study was to evaluate the effects of capping media(sand, organoclay, and powdered activated carbon [PAC]) on microbial communities under oxic conditions typical of the capewater interface, where naphthalene degradation(model PAH) is likely to be maximized. Bench scale experiments compared naphthalene concentrations, nahAc biomarker abundance, microbial community composition, and cellular attachment in systems amended with adsorptive and non-adsorptive capping materials. Results indicate that activated carbon promoted and enhanced bioactivity; PAC treatments showed high biodegradation rates,nahAc biomarker levels, and attached biological growth consistent with enrichment of the PAHdegrading genus Pseudomonae. In contrast, sand did not enhance biological activity compared to media-free systems. Naphthalene strongly influenced microbial community composition at the species level in all treatments except organoclay, which promoted biological signatures commonly associated with impeding degradation activity. Data overall suggest that adsorptive capping materials can both promote(PAC) and inhibit(organoclay) bioactivity in the surficial layer of caps, indicating that media selection is critical to the design of bioactive capping systems.

关键词： Sediments Capping Aerobic biodegradation PAH PAC

Multivariate small area estimation under nonignorable nonresponse

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Statistical Theory and Related Fields 2019年第2期3卷 213-223页

作者： danny Pfeffermann Michael Sverchkov National Statistician and CBS Director JerusalemIsrael Department of Statistics Hebrew UniversityJerusalemIsrael southampton Statistical Sciences Research Institute(S3RI) University of SouthamptonSouthamptonUK Bureau of Labor Statistics WashingtonDCUSA

We consider multivariate small area estimation under nonignorable, not missing at random(NMAR) nonresponse. We assume a response model that accounts for the different patterns ofthe observed outcomes, (which values are observed and which ones are missing), and estimatethe response probabilities by application of the Missing Information Principle (MIP). By this principle, we first derive the likelihood score equations for the case where the missing outcomes areactually observed, and then integrate out the unobserved outcomes from the score equationswith respect to the distribution holding for the missing data. The latter distribution is definedby the distribution fitted to the observed data for the respondents and the response model. Theintegrated score equations are then solved with respect to the unknown parameters indexingthe response model. Once the response probabilities have been estimated, we impute the missing outcomes from their appropriate distribution, yielding a complete data set with no missingvalues, which is used for predicting the target area means. A parametric bootstrap procedure isdeveloped for assessing the mean squared errors (MSE) of the resulting predictors. We illustratethe approach by a small simulation study.

关键词： Distribution of missing data imputation under nonignorable nonresponse missing information principle MSE estimation NMAR nonresponse

High-throughput calculations of charged point defect properties with semi-local density functional theory— performance benchmarks for materials screening applications

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npj Computational Materials 2023年第1期9卷 1628-1639页

作者： danny Broberg Kyle Bystrom Shivani Srivastava Diana Dahliah Benjamin A.D.Williamson Leigh Weston David O.Scanlon Gian-Marco Rignanese Shyam Dwaraknath Joel Varley Kristin A.Persson Mark Asta Geoffroy Hautier Materials Sciences Division Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Physics An-Najah National UniversityNablusPalestine Institute of Condensed Matter and Nanosciences UniversitéCatholique de LouvainChemin desÉtoiles 8B-1348 Louvain-la-NeuveBelgium Department of Materials Science and Engineering NTNU Norwegian University of Science and TechnologyTrondheimNorway Energy Technologies Area Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Department of Chemistry University College London20 Gordon StreetLondon WC1H 0AJUK Thomas Young Centre University College LondonGower StreetLondon WC1E 6BTUK Diamond Light source Ltd. Diamond HouseHarwell Science and Innovation CampusDidcotOxfordshire OX110DEUK Lawrence Livermore National Laboratory LivermoreCA 94550USA Molecular Foundry Lawrence Berkeley National Laboratory1 Cyclotron RoadBerkeleyCA 94720USA Thayer School of Engineering Dartmouth CollegeHanoverNH 03755USA

Calculations of point defect energetics with Density Functional Theory(DFT)can provide valuable insight into several optoelectronic,thermodynamic,and kinetic *** calculations commonly use methods ranging from semi-local functionals with a-posteriori corrections to more computationally intensive hybrid functional *** applications of DFT-based high-throughput computation for data-driven materials discovery,point defect properties are of interest,yet are currently excluded from available materials *** work presents a benchmark analysis of automated,semi-local point defect calculations with a-posteriori corrections,compared to 245“gold standard”hybrid calculations previously *** consider three different a-posteriori correction sets implemented in an automated workflow,and evaluate the qualitative and quantitative differences among four different categories of defect information:thermodynamic transition levels,formation energies,Fermi levels,and dopability *** highlight qualitative information that can be extracted from high-throughput calculations based on semi-local DFT methods,while also demonstrating the limits of quantitative accuracy.

关键词： properties defect correction

跨境B2C电子商务平台购买决策影响因素评估 ——基于中美消费者

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跨境B2C电子商务平台购买决策影响因素评估 ...

作者： danny Sebastian Bonilla Gomez 浙江工商大学

学位级别：硕士

With the fast development of e-commerce,specifically cross-border B2 C platforms in the last two years（specially after the pandemic）,understanding the factors that influence customer purchasing decision has become a key tool to improve industry sales volume,and a hot topic for *** cross-border based on business-to-consumer（B2C）transactions produce transactions equal to $ 230 billion on a yearly *** the other hand,the achievement of this massive number of online customers mainly depends on understanding factors that influence their purchase decision through a global e-commerce *** on theories from previous studies,different hypotheses are proposed and then,since China and USA hold the highest number of cross-border e-commerce consumers worldwide the author decided to take consumers from USA and China who purchase goods on cross-border platforms as target population（samples）using survey questionnaire as the primary source of data *** is used to identify the association between the constructs and,finally,regression analysis is performed to analyze the impact of identified factors on the purchase decision finding that: product uniqueness,price competitiveness,perceived value and trust positively ***,perceived value positively mediates the effects of price competitiveness,product uniqueness and trust on purchase decision *** findings are also in line with the findings of other researchers which signifies that the factors that have determined by this factor as factors of purchase decisions are the primary aspects that cross-border e-commerce platforms must focus on.

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