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mathematical model for Stroke and White matter Hyperintensities

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Journal of Behavioral and Brain Science 2023年第4期13卷 66-94页

作者： James m. gregory Professor Emeritus Civil Engineering Department at Texas Tech University Lubbock TX USA

A mathematical model was developed to predict the risk of having a stroke as a person ages. The age component was derived from the concept that the change in risk of stroke with age is a function of the current risk of developing a stroke. This equation modeled the trend with age reported in the literature for two different data sets with R2 values of 0.97 or better for both men and women. A second equation of a similar nature was developed to predict the accumulation of white matter hyperintensities, WmH, as a person ages. It appears that each equation includes a set of common risk factors. This set of common risk factors allows an individual’s risk for stroke to be based on measured WmH. A third equation links WmH with the risk of developing a stroke. This equation allows an individual to use measured WmH from brain scans to predict the future risk of developing a stroke. In theory, a person with a relatively high measurement of WmH can project future risk for stroke with age and use counter measures such as exercise and medications to keep other risk factors low as a person continues to age.

关键词： Stroke White matter Hyperintensities WmH Aging Depression Trauma PTSD

Enhancing sintering resistance of atomically dispersed catalysts in reducing environments with organic monolayers

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Green Energy & Environment 2022年第6期7卷 1263-1269页

作者： Jing Zhang Chithra Asokan gregory Zakem Phillip Christopher J.Will medlin Department of Chemical and Biological Engineering University of ColoradoBoulderCOUSA Department of Chemical Engineering University of CaliforniaSanta BarbaraSanta BarbaraCAUSA

Atomically dispersed precious metal catalysts maximize atom efficiency and exhibit unique ***,they are susceptible to *** reactions occurring in reducing environments tend to result in atomically dispersed metals sintering at lower temperatures than in oxidative or inert atmospheres due to the formation of mobile metal-H or metal-CO ***,we develop a new approach to mitigate sintering of oxide supported atomically dispersed metals in a reducing atmosphere using organophosphonate self-assembled monolayers(SAms).We demonstrate this for the case of atomically dispersed Rh on Al_(2)O_(3) and TiO_(2) using a combination of CO probe molecule FTIR,temperature programmed desorption,and alkene hydrogenation rate *** suggests that SAm functionalization of the oxide provides physical diffusion barriers for the metal and weakens the interactions between the reducing gas and metal,thereby discouraging the adsorbate-promoted diffusion of metal atoms on oxide *** results show that support functionalization by organic species can provide improved resistance to sintering of atomically dispersed metals with maintained catalytic reactivity.

关键词： Atomically dispersed catalysts Organic monolayers Rh Single atom catalysis Sintering

Engineering porous organic polymers for carbon dioxide capture

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Science China Chemistry 2017年第8期60卷 1007-1014页

作者： Ning Huang gregory Day Xinyu Yang Hannah Drake Hong-Cai Zhou Department of Chemistry Texas A＆M University College Station TX 77843 US

As atmospheric CO_2 levels rise, the development of physical or chemical adsorbents for CO_2 capture and separation is of great importance on the way towards a sustainable low-carbon future. Porous organic polymers are promising candidates for CO_2 capture materials owing to their structural flexibility, high surface area, and high stability. In this review, we highlight high-performance porous organic polymers for CO_2 capture and summarize the strategies to enhance CO_2 uptake and selectivity, such as increasing surface area, increasing interaction between porous organic polymers and CO_2, and pore surface functionalization.

关键词： porous organic polymers C02 capture nanomaterials post-synthesis polymer

Characterization of particle deposition during crossflow filtration as influenced by permeate flux and crossflow velocity using a microfluidic filtration system

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Frontiers of Chemical Science and Engineering 2021年第3期15卷 552-561页

作者： Hongzhan Di gregory J.O.martin Dave E.Dunstan Department of Chemical and Biomolecular Engineering University of MelbourneParkvilleVictoria 3010Australia

Particle deposition during crossflow filtration is significantly influenced by the operating conditions,in particular the permeate flux and crossflow ***,there is a lack of detailed knowledge about how deposit layer structures and distributions depend on operating *** study uses a microfluidic visualisation filtration system to examine the influence of operating conditions on the deposition process during crossflow ultrafiltration from a microscopic *** the permeate flux caused an increasing amount of deposition and a thicker deposit *** crossflow velocities reduced the extent of *** degree of deposition varied over a range of operating conditions due to the altered hydrodynamic forces exerted on the particles,which can be examined by the deposition probability according to an existing *** on this,an empirical correlation between the deposition probability and volume of deposition as a function of filtration time was developed,which gave good agreement with experimental *** effect of solution conditions was also involved in this correlation as a interaction *** could be useful for predicting the dynamic deposition process during crossflow filtration over a range of operating and solution conditions.

关键词： particle deposition crossflow filtration microfluidics confocal microscopy

Ordered SrTiO_3 Nanoripples Induced by Focused Ion Beam

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Nano-micro Letters 2012年第4期4卷 243-246页

作者： Jiang Wu Gang Chen Zhaoquan Zeng Shibin Li Xingliang Xu Zhiming m.Wang gregory J.Salamo State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Institute of Intelligent Optoelectronic Technology Zhejiang University of Technology Institute for Nanoscience and Engineering University of Arkansas

Ordered nanoripples on the niobium-doped SrTiO_3 surfaces were fabricated through focused ion beam bombardment. The surface morphology of the SrTiO_3 nanoripples was characterized using in situ focused ion beam/scanning electron microscopy. The well-aligned SrTiO_3 nanostructures were obtained under optimized ion irradiation conditions. The characteristic wavelength was measured as about 210 nm for different ion beam currents. The relationship between the ion irradiation time and current and SrTiO_3 surface morphology was analyzed. The presented method will be an effective supplement for fabrication of SrTiO_3 nanostructures that can be used for ferroelectric and electronic applications.

关键词： SrTiO3 focused ion beam nanoripple self-assembly

Numerical Simulation of a Weakly Nonlinear model for Internal Waves

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Communications in Computational Physics 2012年第10期12卷 1461-1481页

作者： Robyn Canning gregory David P.Nicholls Department of mathematics Statistics and Computer ScienceUniversity of Illinois at ChicagoChicagoIL 60607USA

Internal waves arise in a wide array of oceanographic problems of both theoretical and engineering *** this contribution we present a newmodel,valid in the weakly nonlinear regime,for the propagation of disturbances along the interface between two ideal fluid layers of infinite extent and different ***,we present a novel high-order/spectral algorithm for its accurate and stable *** validation results and simulations of wave-packet evolution are provided.

关键词： Internal waves weakly nonlinear waves high-order spectral methods Dirichlet Neumann operators surface formulation

Herbaceous peony in warm climate:modelling stem elongation and growers profit responses to dormancy conditions

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Information Processing in Agriculture 2016年第3期3卷 175-182页

作者： menashe Cohen Rina Kamenetsky gregory Yom Din Northern R&D MigalP.O.Box 831Kiryat Shmona 11016Israel Institute of Plant Science Agricultural Research OrganizationVolcani CenterBet Dagan 50250Israel Open University of Israel RaananaIsrael Faculty of Exact Sciences Tel Aviv UniversityTel AvivIsrael

We analysed the data collected for herbaceous peony cultivated in a warm climate region and stored in winter under three constant chilling *** used the quadratic regression model to describe the stem elongation responses to winter dormancy conditions,and the logistic function to describe the weekly stems *** predicted maximal stem length from the first model was used as the input parameter for the second *** than 4000 data for various(a)chilling constant temperatures during dormancy,(b)dormancy duration,and(c)germination duration,were *** models were applied to determine the optimal number of chill *** this purpose,two criteria were used in different versions of the model:the maximal stem length and the maximal profit of *** the two chilling temperatures of 2℃ and 6℃,the optimal values of chill units(in the models of a maximal stem length and maximal profit of farmers)are close to one another,and the values of a maximal stem length and maximal profit are significantly *** the case of the third chilling temperature of 10℃,the model failed to determine the optimal number of chill *** method of inverse confidence intervals for testing the significance of the optimal number of chill units was used.

关键词： Peony Dormancy Regression Logistic function Inverse confidence intervals Profit

BE A BETTER TEACHER: LEARN HOW STUDENTS LEARN

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山东外语教学 1993年第3期14卷 77-79页

作者： gregory Lee

The Englsih word education comes from two Latin words: "ex" means "out of" and "ducere" is "to lead. " Thus, education is a process of "leading out" NOT "putting in. " The traditional method of lecturing is still wide spread. In a lecture, the teacher is active and the students are passive. This is much like a brewery where beer is being bottled. The worker is active, filling the emp-

关键词： putting comes verbal lecture filling think learner talking prehension worker

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学习策略:系统综合与概念模型(上)

数字教育 2024年第2期10卷 85-92页

作者：约翰·哈蒂格雷戈里·多诺霍陈伦菊(译) 盛群力(译) 墨尔本大学墨尔本教育研究院澳大利亚墨尔本3010 浙江外国语学院浙江杭州310023 浙江大学教育学院浙江杭州310058

本文旨在构建一种学习模型,说明不同学习策略在学习周期不同阶段的强大作用。该模型描述了3个输入和输出因素(技能、意愿和动机)、成功标准和学习的3个阶段(表层学习、深度学习和迁移),及表层学习和深度学习过程中各自的获取阶段和巩固... 详细信息

本文旨在构建一种学习模型,说明不同学习策略在学习周期不同阶段的强大作用。该模型描述了3个输入和输出因素(技能、意愿和动机)、成功标准和学习的3个阶段(表层学习、深度学习和迁移),及表层学习和深度学习过程中各自的获取阶段和巩固阶段。228个元分析的综合结果呈现出最有效的学习策略。分析结果表明:存在一个有效的子策略,但这种有效性取决于实施这些策略时所处的学习阶段。此外,最好不要单独开展学习策略培训,而是将各种策略嵌入学科内容,明晰发展表层学习和深度学习,促进相关的最佳策略,并传授学习迁移的技能。最后,本文针对模型有待进一步研究的问题进行了讨论。

关键词：学习策略学习模型元分析可见的学习