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Impact shock frequency components and attenuation in rearfoot and forefoot running

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Journal of Sport and Health Science 2014年第2期3卷 113-121,153+157页

作者： allison H.Gruber katherine A.Boyer Timothy R.Derrick Joseph Hamill Biomechanics Laboratory University of Massachusetts Amherst Biomechanics Laboratory Iowa State University

Background:The forefoot running footfall pattern has been suggested to reduce the risk of developing running related overuse injuries due to a reduction of impact related variables compared with the rearfoot running footfall ***,only time-domain impact variables have been compared between footfall *** frequency content of the impact shock and the degree to which it is attenuated may be of greater importance for injury risk and prevention than time-domain ***,the purpose of this study was to determine the differences in head and tibial acceleration signal power and shock attenuation between rearfoot and forefoot ***:Nineteen habitual rearfoot runners and 19 habitual forefoot runners ran on a treadmill at 3.5 m/s using their preferred footfall patterns while tibial and head acceleration data were *** magnitude of the first and second head acceleration peaks,and peak positive tibial acceleration were *** power spectral density of each signal was calculated to transform the head and tibial accelerations in the frequency *** attenuation was calculated by a transfer function of the head signal relative to the ***:Peak positive tibial acceleration and signal power in the lower and higher ranges were significantly greater during rearfoot than forefoot running(/> ks and head signal power were not statistically different between patterns(p > 0.05).Rearfoot running resulted in significantly greater shock attenuation for the lower and higher frequency ranges as a result of greater tibial acceleration(p k frequency content between footfall patterns suggests that the primary mechanisms for attenuation may *** relationship between shock attenuation mechanisms and injury is not clear but given the differences in impact frequency content,neither footfall pattern may be more benefi

关键词： Frequency domain Impact shock Running footfall patterns Shock attenuation Tibial acceleration

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20th century travel

20th century travel

PRISMS-Fatigue computational framework for fatigue analysis in polycrystalline metals and alloys

作者： Jim Heimann allison Silver.

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npj Computational Materials 2021年第1期7卷 349-360页

作者： Mohammadreza Yaghoobi krzysztof S.Stopka Aaditya Lakshmanan Veera Sundararaghavan John E.allison David L.McDowell Materials Science and Engineering University of MichiganAnn ArborMIUSA Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGAUSA Aerospace Engineering University of MichiganAnn ArborMIUSA School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGAUSA

The PRISMS-Fatigue open-source framework for simulation-based analysis of microstructural influences on fatigue resistance for polycrystalline metals and alloys is presented *** framework uses the crystal plasticity finite element method as its microstructure analysis tool and provides a highly efficient,scalable,flexible,and easy-to-use ICME community *** PRISMS-Fatigue framework is linked to different open-source software to instantiate microstructures,compute the material response,and assess fatigue indicator *** performance of PRISMS-Fatigue is benchmarked against a similar framework implemented using *** indicate that the multilevel parallelism scheme of PRISMS-Fatigue is more efficient and scalable than ABAQUS for large-scale fatigue *** performance and flexibility of this framework is demonstrated with various examples that assess the driving force for fatigue crack formation of microstructures with different crystallographic textures,grain morphologies,and grain numbers,and under different multiaxial strain states,strain magnitudes,and boundary conditions.

关键词： fatigue alloys grain

An overview of the role of neutrophils in innate immunity,inflammation and host-biomaterial integration

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Regenerative Biomaterials 2017年第1期4卷 55-68页

作者： Gretchen S.Selders allison E.Fetz Marko Z.Radic Gary L.Bowlin Department of Biomedical Engineering University of MemphisMemphisTNUSA Department of Microbiology Immunology and BiochemistryUniversity of Tennessee Health Science Center(UTHSC)MemphisTN 38163USA

Despite considerable recent progress in defining neutrophil functions and behaviors in tissue repair,much remains to be determined with regards to its overall role in the tissue integration of *** article provides an overview of the neutrophil’s numerous,important roles in both inflammation and resolution,and subsequently,their role in biomaterial *** function in three primary capacities:generation of oxidative bursts,release of granules and formation of neutrophil extracellular traps(NETs);these combined functions enable neutrophil involvement in inflammation,macrophage recruitment,M2 macrophage differentiation,resolution of inflammation,angiogenesis,tumor formation and immune system *** exhibit great flexibility to adjust to the prevalent microenvironmental conditions in the tissue;thus,the biomaterial composition and fabrication will potentially influence neutrophil behavior following *** review serves to highlight the neutrophil’s plasticity,reiterating that neutrophils are not just simple suicidal killers,but the true maestros of resolution and regeneration.

关键词： neutrophil tissue engineering NETosis tissue regeneration host response inflammation

压铸过程中铸件-铸型界面换热系数与铸件凝固速率的关系

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金属学报 2009年第1期45卷 102-106页

作者：郭志鹏熊守美 Mei Li John allison 清华大学机械工程系先进成形制造教育部重点实验室北京100084 Research ＆ Advanced Engineering Department Scientific Research Laboratory Ford Motor Company Dearborn MI 48121 USA

在实际压铸实验的基础上,求解了铸件-铸型界面换热系数h与铸件凝固速率v的关系.结果表明,二者呈线性变化关系:h=k_(h-v)·v+ω(其中,斜率k_(h-v)为铸型初始表面温度及铸件厚度的函数,ω为常数);通过线性拟合确定k_(h-v)和ω值,从而确立... 详细信息

在实际压铸实验的基础上,求解了铸件-铸型界面换热系数h与铸件凝固速率v的关系.结果表明,二者呈线性变化关系:h=k_(h-v)·v+ω(其中,斜率k_(h-v)为铸型初始表面温度及铸件厚度的函数,ω为常数);通过线性拟合确定k_(h-v)和ω值,从而确立换热系数与铸件凝固速率的关系.这种关系同时适用于镁合金AM50和铝合金ADC12.

关键词：压铸界面换热系数凝固速率镁合金AM50 铝合金ADC12

Treatment priority for suicide ideation and behaviours at an Australian emergency department

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World Journal of Psychiatry 2013年第2期3卷 34-40页

作者： allison Milner kairi k?lves keili k?lves Beverley Gladman Diego De Leo Australian Institute for Suicide Research and Prevention National Centre of Excellence in Suicide PreventionWHO Collaborating Centre for Research and Training in Suicide PreventionGriffith UniversityBrisbaneQueensland 4122Australia Queensland Centre for Mental Health Research The ParkWacolQueensland 4076Australia

AIM: To investigate the treatment priority given to selfharmers presenting to a hospital emergency department(ED) in Queensland, Australia, over the period 2005-2010. METHODS: The main outcome measure of this study was the treatment priority given to persons presenting with suicide ideation and communication(SIC) or self-harming behaviour. Treatment priority was measured using the Australasian Triage Scale, which ranks patients from 1(in need of immediate treatment) to 5(assessment and treatment to start within 120 min). Ordered logistic regression was used to assess the broad demographic and treatment-related factors associated with more urgent triage categories and to in-vestigate which methods of non-fatal suicidal behaviour(NFSB) were prioritised as most ***: Most cases of NFSB were between 15 and 34 years. A larger proportion of persons presenting for SIC were aged 35 to 44 years. Over 50% of male presentations and 38% of female presentations were for SIC. Those cases prioritised as being more urgent had significantly greater odds of being older, presented after an act of self-harm rather than SIC, and had used multiple methods of NFSB. These individuals also had greater odds of being male and having made past presentations for SIC or NFSB. Among males, those presenting after ingestion of drugs had the greatest odds of receiving immediate attention compared to SIC. "Cutters" were considered as the least "urgent" subjects, and had a greatest risk of waiting 60 to 120 min for treatment compared to suicide ideators. Among females, those presenting with chemicals, poisons and gases had the greatest odds of receiving immediate attention compared to SIC. Females who presenting after cutting themselves had lower odds of receiving immediate treatment than those who presented with SIC. CONCLUSION: ED staff seems to judge the urgency of cases based on demographic factors such as age and gender, as well as method of NFSB.

关键词： Suicide ideation Non-fatal suicidal behaviour Emergency department Treatment priority

Development and use of biomaterials as wound healing therapies

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Burns & Trauma 2019年第1期7卷 8-16页

作者： Rachael Zoe Murray Zoe Elizabeth West allison June Cowin Brooke Louise Farrugia The Institute for Health and Biomedical Innovation School of Biomedical SciencesFaculty of HealthQueensland University of TechnologyBrisbaneQLD 4059Australia Future Industries Institute University of South AustraliaAdelaideSA 5095Australia.3Graduate School of Biomedical EngineeringUniversity of New South WalesSydneyNSW 2052Australia Graduate School of Biomedical Engineering University of New South WalesSydneyNSW 2052Australia Full list of author information is available at the end of the article

There is a vast number of treatments on the market for the management of wounds and burns,representing a multi-billion dollar industry *** include conventional wound dressings,dressings that incorporate growth factors to stimulate and facilitate the wound healing process,and skin substitutes that incorporate patientderived *** article will review the more established,and the recent advances in the use of biomaterials for wound healing therapies,and their future direction.

关键词： Wound healing Wounds Burns Biomaterials Skin substitutes

Understanding heart failure in the elderly with respect to diastolic dysfunction and role for natriuretic peptides

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老年心脏病学杂志：英文版 2005年第4期2卷 216-217页

作者： Thomas G.allison Division of Cardiovascular Diseases and Internal Medicine Mayo Clinic RochesterMNUSA

The current issue of the Journal of Geriatric Cardiology contains an interesting paper by Dr. Yixin Song and colleagues raising important issues in the diagnosis and management of heart failure in elderly patients. Readers of this journal are in all likelihood aware that the epidemic of heart failure is of great impact medically and economically worldwide.

关键词： BNP Understanding heart failure in the elderly with respect to diastolic dysfunction and role for natriuretic peptides

ILLUMINATION AND EXPOSITION OF A CONVEX n-DIMENSIONAL BODY DEPENDING ON ITS SHARPNESS

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Acta Mathematica Scientia 2002年第2期22卷 189-198页

作者： Boris V. Dekster Mathematics, Mount allison University, Sackville, N.B. EOA 3C0, Canada Mathematics Mount Allison University Sackville N.B. E0A 3C0 Canada

A convex n-body C is said to be exposable to a set D of a few directions if there is a linear transformation L : En → En such that L(C) arid each body isometric to L(C) is illuminated by D. Denote by En the minimum integer such that each C is exposable to a (fixed) set D of cardinality En. An upper bound for En is established here.

关键词： Covering illumination Hadwiger conjecture