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Aerosol jet printed capacitive strain gauge for soft structural materials

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npj Flexible Electronics 2020年第1期4卷 279-287页

作者： Kiyo T.Fujimoto Jennifer K.watkins Timothy Phero Doug Litteken Kevin Tsai Takoda Bingham Kshama Lakshmi Ranganatha Benjamin C.Johnson Zhangxian Deng Brian Jaques David Estrada Center for Advanced Energy Studies Boise State UniversityIdaho FallsIDUSA Micron School of Materials Science and Engineering Boise State UniversityBoiseIDUSA Measurement Sciences Department Idaho National LaboratoryIdaho FallsIDUSA Department of Advanced Fuel Manufacturing and Development Idaho National LaboratoryIdaho FallsIDUSA NASA Johnson Space Center HoustonTXUSA Department of Mechanical and Biomedical Engineering Boise State UniversityBoiseIDUSA Department of Electrical and Computer Engineering Boise State UniversityBoiseIDUSA

Soft structural textiles,or softgoods,are used within the space industry for inflatable habitats,parachutes and decelerator *** the safety and structural integrity of these systems occurs through structural health monitoring systems(SHM),which integrate non-invasive/non-destructive testing methods to detect,diagnose,and locate ***/load monitoring of these systems is limited while utilizing traditional strain gauges as these gauges are typically stiff,operate at low temperatures,and fail when subjected to high strain that is a result of high loading classifying them as unsuitable for SHM of soft structural *** this work,a capacitance based strain gauge(CSG)was fabricated via aerosol jet printing(AJP)using silver nanoparticle ink on a flexible polymer *** strain gauges were then compared to a commercially available high elongation resistance-based strain gauge(HE-RSG)for their ability to monitor strained Kevlar straps having a 26.7 kN(6 klbf)***,static and cyclic loads were used to characterize both types of strain monitoring *** CSGs demonstrated superior performance for high elongation strain measurements when compared to commonly used HE-RSGs,and were observed to operate with a gauge factor of 5.2 when the electrode arrangement was perpendicular to the direction of strain.

关键词： strain gauge structural

Diffractive Multi-beam Ultra-fast Laser Micro-processing Using a Spatial Light Modulator(Invited Paper)

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中国激光 2009年第12期36卷 3093-3115页

作者： Walter Perrie S. P. Edwardson E. Fearon G. Dearden K. G. watkins Laser Group Department of EngineeringUniversity of LiverpoolBrownlow Street

Multi-beam ultra-fast laser parallel microprocessing using spatial light modulation is demonstrated in this *** multi-beam patterns are generated with a spatial light modulator(SLM),which is driven by computer generated holograms(CGHs).The CGHs calculated by appropriate algorithms are displayed on the SLM to split an input laser beam to a number of beamlets and digitally manipulate their positions and *** undesired damage by the energetic zero order beam can be avoided by either installing a 4f optical system to block the zero order at the Fourier plane or adding a Fresnel zone lens on the CGH to defocus the zero order at the processing *** surface ablation of materials using multi-beam patterns synchronised with a scanning galvanometer system shows flexible and high throughput parallel *** tightly focusing the diffractive beams with an objective into transparent materials,high speed dynamic femto-second laser two-dimensional(2D) and three-dimensional(3D) internal structuring is also *** results demonstrate the high precision micro-processing with higher efficiency,showing the potential for ultra-fast laser parallel processing in real industrial applications.

关键词：多波束超快速激光数字处理光学系统傅里叶平面

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Occipital nerve stimulation for chronic migraine

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中华物理医学与康复杂志 2017年第3期39卷 233-233页

作者： Miller S watkins L Matharu M

BACKGROUND AND OBJECTIVE Despite medical advances,it is estimated that five percent of patients with chronic migraine(CM)are refractory to *** some have suggested the feasibility of occipital nerve stimulation(ONS)for the treatment of these headaches,this study examined the long-term outcomes of a single center cohort of patients with CM undergoing ONS.

关键词：偏头痛慢性治疗神经 CM 患者

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Geochemical Characterization of Base Metals in Stream Water and Sediments in the Caddo Lake Watershed, Cass, Harrison and Marion Counties, Texas

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Journal of Geoscience and Environment Protection 2020年第9期8卷 1-23页

作者： Melinda S. Faulkner Melanie L. Ertons Joseph W. watkins Department of Geology Stephen F. Austin State University Nacogdoches TX USA

The Caddo Lake watershed is located in northeastern Texas and encompasses much of Cass, Harrison, and Marion counties. The watershed is drained by major streams and tributaries flowing in an easterly direction over Eocene-aged rocks and sediments of the Wilcox and Claiborne groups, and empty into the western arm of Caddo Lake. Since 1995, Caddo Lake and some of its tributaries have been included on the State of Texas Clean Water Act 303(d) list by the Texas Commission on Environmental Quality (TCEQ) for impairment due to mercury content in edible tissue, depressed dissolved oxygen, base metal concentrations, and low pH values. The purpose of this multi-year study was to characterize base metal concentrations in stream water and sediments in the Caddo Lake watershed, and document the potential watershed transport and contribution to the impairment of Caddo Lake. Recent water (n = 58) and sediment (n = 116) sampling at 29 sites revealed copper, lead, and zinc concentrations within normal limits and below EPA actionable standards. Mercury concentrations were elevated at 21 of the 29 sampling sites, which could lead to methylation and bioavailability to organisms at all trophic level.

关键词： Caddo Lake Mercury Base Metals Geochemistry Metal Transport

新船订单暴涨船舶租金翻番——上半年集装箱运输市场盘点

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中国航务周刊 2021年第29期 29-31页

作者： Olivia watkins Vessels Value

预计上半年集装箱运输市场的火热行情,将持续到年底。随着新冠疫苗在全球范围内的广泛使用,欧美国家的疫情防控正稳中向好,集装箱运输市场需求持续旺盛。但另一方面,由于受前期苏伊士运河堵塞事件影响,港口拥堵、船期紊乱以及空箱周转... 详细信息

预计上半年集装箱运输市场的火热行情,将持续到年底。随着新冠疫苗在全球范围内的广泛使用,欧美国家的疫情防控正稳中向好,集装箱运输市场需求持续旺盛。但另一方面,由于受前期苏伊士运河堵塞事件影响,港口拥堵、船期紊乱以及空箱周转迟缓等因素叠加,造成全球集装箱船运行不畅,运力供应吃紧,市场整体供不应求。

关键词：巴拿马型船 TEU 集装箱运输市场集装箱船

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全球新造船市场明显两极分化

中国航务周刊 2020年第48期 31-33页

作者： Olivia watkins Vessels Value

3000TEU以下的小型集装箱船,逐渐与大型集装箱船平分秋色,成为新造船市场的主力。日前,东方海外宣布订造7艘23000TEU超大型集装箱船,目的是优化船队结构及运力,提升成本竞争力和经营效益。这是2020年最新一笔超大型集装箱船订单,也延续...

3000TEU以下的小型集装箱船,逐渐与大型集装箱船平分秋色,成为新造船市场的主力。日前,东方海外宣布订造7艘23000TEU超大型集装箱船,目的是优化船队结构及运力,提升成本竞争力和经营效益。这是2020年最新一笔超大型集装箱船订单,也延续了过去几年,新造集装箱船市场对超大型船舶热捧的趋势。但值得注意的是,根据船舶估值和航运大数据公司VesselsValue的新造船订单数据,

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Variations in zonal fruit starch concentrations of apples – a developmental phenomenon or an indication of ripening?

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Horticulture Research 2015年第1期2卷 84-92页

作者： Franziska C Doerflinger William B Miller Jacqueline F Nock Christopher B watkins Horticulture Section School of Integrative Plant ScienceCornell UniversityIthaca14853NYUSA School of Agriculture Food&WineUniversity of AdelaideWaite CampusGlen Osmond5064South AustraliaAustralia

Patterns of starch hydrolysis in stem,equatorial,and calyx zones of‘Honeycrisp’and‘Empire’apples(Malus sylvestris(L.)Mill ***(Borkh.)Mansf.)during maturation and ripening,and in‘Gala’apples in response to propylene or 1-methylcyclopropene(1-MCP)treatments after harvest,were *** in zonal starch concentrations were found for‘Empire’and‘Gala’fruits,but not for‘Honeycrisp’.During maturation and ripening of‘Empire’,the concentration of starch was highest in the calyx end and lowest in the stem region.Differences in rates of starch hydrolysis among zones were not detected.‘Honeycrisp’and‘Empire’had the highest concentration of sorbitol in the calyx region,whereas it was highest in the stem-end region in‘Gala’.The distribution differences of glucose,fructose,and sucrose were similar in all three cultivars;higher fructose and glucose concentrations in the stem region,and higher sucrose concentrations in the calyx end of the *** treatment of‘Gala’with propylene did not affect the internal ethylene concentration of the fruit but 1-MCP markedly inhibited *** concentrations were highest in the calyx end but gradients of starch among zones were not changed by postharvest *** rate of hydrolysis was slowed by 1-MCP treatment,but was unaffected by *** treatments influenced sorbitol,glucose,and fructose *** of starch concentration among the zones did not confirm differences in ripening,but reflected its uneven distribution throughout the fruit during ***,measured differences in zonal starch are most likely related to starch accumulation during fruit development,rather than differences in rates of starch degradation during ripening.

关键词： cultivar fir starch

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星谈

孔子学院 2018年第2期 18-19页

作者： Deja watkins 安罗高中孔子课堂

我学中文已经五年有余。自我入学安罗高中起,我便开始学习中文,一直到高中毕业都是在安罗高中学习中文。目前我正在读大学,同时也在继续上中文课。我喜欢学习他国文化,也很想学习中国文化,所以当初当我得知我即将要就读的高中开设了中... 详细信息

我学中文已经五年有余。自我入学安罗高中起,我便开始学习中文,一直到高中毕业都是在安罗高中学习中文。目前我正在读大学,同时也在继续上中文课。我喜欢学习他国文化,也很想学习中国文化,所以当初当我得知我即将要就读的高中开设了中文课程的时候,我激动不已。

关键词：高中学习中文课程中国文化高中毕业入学大学

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Adsorption of Propazine, Simazine and Bisphenol A on the Surface of Nanoparticles of Iron Oxide Nanoparticles of Carbon and Metallic Oxides

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Journal of Environmental Protection 2018年第1期9卷 13-24页

作者： Matthewos Eshete Jerrano Bowleg Selene G. Perales Maxwell Okunrobo Dominique watkins Hattie Spencer Department of Natural Sciences and Environmental Health Mississippi Valley State University Itta Bena MS USA

Simazine and propazine are selective triazine herbicides currently in use to control broad-leaved weeds and annual grasses around the world. Bisphenol A (BPA) is an industrial chemical used in the production of polycarbonate plastics often found in consumer goods, such as plastic containers, baby bottles etc. These synthetic compounds are known to increase the risk of cancer, cause adverse reproductive effect in reptiles, mammals, birds, humans, and lead to other health problems. They have become some of the principal agents of contamination in water bodies around the world through herbicide runoff, industrial waste and leaching. Some triazines such as atrazine are banned in most European countries for over ten years due to their adverse reproductive effect in mammals, birds and humans;however propazine and simazine are still in use around the world. The removal of these compounds from contaminated water is an exigent challenge. In this study, we investigated their affinity for the surface of nanoparticles (NPS) and standard metallic oxides in an effort to exploit the unique potential applications of NPS for water purification systems. We studied the adsorption of the two triazines and BPA on the surface of NPS of iron (III) oxide, NPS of carbon, bulk iron (III) oxide and aluminum oxide at pH 6 and pH 8 using UV-Visible spectroscopy. Result indicates that these compounds have different affinity towards the surface of metallic oxides and carbon at various pHs. In general, there is relatively high adsorption of some of these compounds on the surface of NPS compared to bulk particles. NPS of carbon have shown the highest affinity for all the three compounds. The lower pH was found to be favorable for all of the compounds except for BPA. BPA have shown high adsorption at pH 8 than at pH 6.

关键词： Triazine Adsorption of Nanoparticles Nanoparticles of Iron Oxide Nanoparticles of Carbon Bisphenol A