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第一届上海国际护理大会

作者： Carolyn F. Covington Nathaniel johnson Isong joyce King Irnise Fenne Annapurni jayam-Trouth Annette evans Howard University

Despite advances in stroke treatment in the United States stroke remains the third leading cause of death among minorities’ populations and the leading cause of serious, long-term disability in the United States. Minority populations are less likely to know all stroke symptoms, and far less likely to know all heart attack symptoms. There are many benefits of early treatment of stroke yet the majority of minorities don’t get this treatment they need because they do not recognize the warning signs, risk factors and prevention of stroke. Objectives: The objectives of this community based stroke prevention intervention course is to develop stroke champions in minority communities to increase knowledge and awareness of stroke warning signs, risk factors and prevention in minority populations living in a major urban community. Methods: The theoretical approach is based on Social Cognitive Theory and the Stages of Change. A multi-site quasi-experimental design was used to（a） significantly increase minority communities knowledge and awareness about stroke, warning signs, risk factors and prevention.（b） Empower minority communities to decide to engage in health promoting behaviors to reduce their risk for stroke. The Behavioral Risk FactorSurveillance Survey（BRFSS） was used to collect data in this study. Blood pressure screenings and referral were also conducted. A convenience sample of 3 males and 13 females participated in this study. Eighty-five percent were black,（12%） white and other（3%）. Results: Most participants in this study perceived their health status as good（56%） or very good（31%）. The Wilcoxon mathched-pairs Signed Rank test indicate that mean scores for knowledge of health promoting behaviors for stroke was(z =.00;p=1.00, knowledge of risk factors for stroke（z =.316;p=.752） and warning signs of stroke（z =-.137;p=.891）. Conclusions: Overall participants did not show increased in knowledge and awareness of stroke warning signs and risk factors and prevention. Lo

关键词： stroke prevention minority communities community health health Promotion

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Avulsion Dynamics in a River with Alternating Bedrock and Alluvial Reaches, Huron River, Northern Ohio (USA)

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Open journal of Modern Hydrology 2019年第1期9卷 20-39页

作者： Mark j. Potucek james E. evans Arizona Department of Water Resources Phoenix AZ USA Department of Geology Bowling Green State University Bowling Green OH USA

The Huron River consists of alternating bedrock reaches and alluvial reaches. Analysis of historical aerial photography from 1950-2015 reveals six major channel avulsion events in the 8-km study area. These avulsions occurred in the alluvial reaches but were strongly influenced by the properties of the upstream bedrock reach (“inherited characteristics”). The bedrock reaches aligned with the azimuth of joint sets in the underlying bedrock. One inherited characteristic in the alluvial reach downstream is that the avulsion channels diverged only slightly from the orientation of the upstream bedrock channel (range 2 °- 38 °, mean and standard deviation 12.1 °± 13.7 °). A second inherited characteristic is that avulsion channels were initiated from short distances downstream after exiting the upstream bedrock channel reach (range 62 - 266 m, mean and standard deviation 143.7 ± 71.0 m), which is a fraction of the meander wavelength (1.2 km). Field evidence shows that some avulsion channel sites were re-occupied episodically. In addition, two properties were necessary for channel avulsions: 1) avulsion events were triggered by channel-forming hydrologic events (5-year recurrence interval flows), but not every channel-forming hydrologic event resulted in an avulsion, and 2) channel sinuosity (P) increased to 1.72 - 1.77 prior to an avulsion then decreased to 1.65 - 1.70 following an avulsion, suggesting that P ≥ 1.72 is the “critical sinuosity” or triggering value for avulsions on the Huron River. In summary, for this river consisting of alternating bedrock and alluvial reaches, the bedrock reaches impose certain parameters on downstream alluvial reaches (including sediment supply, channel direction and avulsion channel position downstream after exiting a bedrock reach) while adjustments in sinuosity and sediment storage occur in the alluvial reaches.

关键词： Avulsion Bedrock Channels Alluvial Channels Cut-Offs Historical Changes Fluvial Sediment Budgets

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Predicting Ground Effects of Omnidirectional Antennas in Wireless Sensor Networks

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Wireless Sensor Network 2010年第12期2卷 879-890页

作者： john F. janek jeffrey j. evans 不详

Omnidirectional antennas are often used for radio frequency (RF) communication in wireless sensor networks (WSNs). Outside noise, electromagnetic interference (EMI), overloaded network traffic, large obstacles (vegetation and buildings), terrain and atmospheric composition, along with climate patterns can degrade signal quality in the form of data packet loss or reduced RF communication range. This paper explores the RF range reduction properties of a particular WSN designed to operate in agricultural crop fields to collect aggregate data composed of subsurface soil moisture and soil temperature. Our study, using simulation, anechoic and field measurements shows that the effect of antenna placement close to the ground (within 10 cm) signi?cantly changes the omnidirectional transmission pattern. We then develop and propose a prediction method that is more precise than current practices of using the Friis and Fresnel equations. Our prediction method takes into account environmental properties for RF communication range based on the height of nodes and gateways.

关键词： Omnidirectional Antenna Ground Effects Wireless Densor Networks

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Plant growth and nutrient use efficiency of two native Fabaceae species for mineland revegetation in the eastern Amazon

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journal of Forestry Research 2020年第6期31卷 2287-2293页

作者： Silvio j.Ramos Markus Gastauer Simone K.Mitre Cecı´lio F.Caldeira joyce R.Silva Antonio E.Furtini Neto Guilherme Oliveira Pedro W.M.Souza Filho jose´O.Siqueira Instituto Tecnolo´gico Vale Rua Boaventura da Silva955Belem 66055-090Brazil Departamento de Ciencia do Solo Universidade Federal de LavrasLavras 37200-000Brazil

The primary challenge of mineland revegetation is the establishment of species able to cope with low availability of nutrients,especially in steep slopes such as of mine *** evaluated plant growth response and nutrient use efficiency(NUE)of two promising native Fabaceae species(Dioclea apurensis—liana from metalliferous savannas;Bauhinia longipedicellata—tree from Amazon rainforest)from the Caraja´s Mineral Province,eastern *** were grown separately in 2-kg pots filled with mining *** were fertilized with nitrogen,phosphorus,potassium(NPK),lime,and *** results showed increments on growth of both species when nutrients were applied to the mining *** showed increases in leaf area,plant height,stem diameter,and shoot dry mass production when NPK or NPK?micronutrients were applied,while *** was responsive to application of NPK?lime or NPK?lime?***,*** showed higher NUE than ***,especially at the lowest doses of N,P and *** findings may indicate a substantial advantage of *** for mineland revegetation,as this species may require lower nutrient inputs,being,therefore,a more sustainable way to revegetate degraded areas.

关键词： Fertilizer application Mining soil Tropical forest Nutrient use efficiency

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Menaquinone (Vitamin K2) Enhancement of <i>Staphylococcus aureus</i>Biofilm Formation

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journal of Biosciences and Medicines 2014年第1期2卷 26-32页

作者： Derek T. Kirby joyce M. Savage Balbina j. Plotkin Department of Microbiology and Immunology Midwestern University Downers Grove USA

During infection, Staphylococcus aureus is exposed to exogenous menaquinone which is essential for the human blood clotting cascade. The effect of exogenous menaquinone on S. aureus phenotypic expression is not known. To test whether menaquinone affects expression of virulence-associated phenotypes, methicillin-sensitive (MSSA) and -resistant (MRSA) S. aureus strains (n = 8) were grown in the presence of menaquinone (0.001 - 12 μg/ml). Capsule production, biofilm formation (plastic and fibronectin-coated microtiter plates) and carotenoid levels were determined spectrophotometrically after growth in Mueller Hinton broth (MH;24-hr, 37°C). All experiments were, at minimum, done in triplicate and repeated twice. Menaquinone at physiologic levels (0.01 μg/ml MH) significantly increased (p 0.05) biofilm formation on plastic in a manner that was bacterial population size dependent. In addition, menaquinone (0.05 - 4 μg/ml) significantly increased (p 0.05) biofilm formation on fibronectin-coated surfaces for four MSSA strains and one MRSA strain by two to six-fold as compared to medium controls. However, menaquinone had no effect on capsule production or cell-associated carotenoid levels. Menaquinone’s effect on biofilm formation on fibronectin-coated surfaces appears to be regulated by sarA. These findings are the first to demonstrate that a vitamin at concentrations reported in humans affects S. aureus virulence-associated phenotypes.

关键词： Quorum S. aureus Menaquinone Fibronectin Biofilm Capsule Plastic Adherence Carotenoid

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Searching for a route to synthesize in situ epitaxial Pr_(2)Ir_(2)O_(7) thin films with thermodynamic methods

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npj Computational Materials 2021年第1期7卷 1320-1325页

作者： Lu Guo Shun-Li Shang Neil Campbell Paul G.evans Mark Rzchowski Zi-Kui Liu Chang-Beom Eom Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWisconsinUSA Department of Materials Science and Engineering The Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA Department of Physics University of Wisconsin-MadisonMadisonWisconsinUSA

In situ growth of pyrochlore iridate thin films has been a long-standing challenge due to the low reactivity of Ir at low temperatures and the vaporization of volatile gas species such as IrO_(3)(g)and IrO_(2)(g)at high temperatures and high PO_(2).To address this challenge,we combine thermodynamic analysis of the Pr-Ir-O_(2)system with experimental results from the conventional physical vapor deposition(PVD)technique of *** results indicate that only high growth temperatures yield films with crystallinity sufficient for utilizing and tailoring the desired topological electronic properties and the in situ synthesis of Pr_(2)Ir_(2)O_(7)thin films is fettered by the inability to grow with PO_(2)on the order of 10 Torr at high temperatures,a limitation inherent to the PVD ***,we suggest techniques capable of supplying high partial pressure of key species during deposition,in particular chemical vapor deposition(CVD),as a route to synthesis of Pr_(2)Ir_(2)O_(7).

关键词： process thermodynamic synthesis

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Modeling of Defect Production in Helium-implanted Silicon Carbide Crystal—an explanation of our TEM results

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IMP & HIRFL Annual Report 2002年 56-58页

作者： S.E.Donnelly,j.H.evans joule Physics Laboratory School of Sciences University of Salford Greater Manchester M5 4WT UK. 27 Clevelands Abingdon Oxon UK.

In this work we present a model in an effort to give an explanation of the observed cross-sectional features described as follows of the bubble layer of the intermediate dose regime (Fig.1) in our recent TEM study of helium-implanted 4H-SiC.1. Sharp boundaries of the bubble layer-helium bubbles were formed in a well-defined depth region, which

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RESTORING THE NATURAL BALANCE: USE OF THE SPECIFIC PREDATOR RHIZOPHAGUS GRANDIS TO MANAGE INFESTATIONS OF THE EXOTIC BARK BEETLE DENDROCTONUS MICANS IN THE UNITED KINGDOM

RESTORING THE NATURAL BALANCE: USE OF THE SPECIFIC PREDATOR ...

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The ⅩⅤth International Plant Protection Congress

作者： Hugh F evans Nicholas j FIELDING Forest Research Alice Holt Lodge Wrecclesham Farnham Surrey GU10 4LH UK Forest Research Technical Support Unit Shobdon Research Office Uphampton Shobdon Leominster Hereford HR6 9PB UK

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聚氨酯预制隔热管的生产技术和用于集中供热管道高质量的聚氨酯泡沫系统

聚氨酯预制隔热管的生产技术和用于集中供热管道高质量的聚氨酯泡...

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中国聚氨酯工业协会第十次年会

作者： jürgen Kellner David evans 沈嵘亨斯迈聚氨酯公司

概述了各种管道制造技术的优缺点,并根据管道制造商的特别情况,提供最合适技术的选择意见。此外,还论述了用于不同管道制造技术的聚氨酯泡沫系统,以及完全符合欧洲标准EN253的用于地下热水网的预制隔热连管的聚氨酯泡沫系统。

关键词：聚氨酯泡沫预制隔热管硬泡发泡剂

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尤利西斯

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作者： j.·乔伊斯(james joyce)

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