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驾驶插电式混合动力车的第一年福特C--MaxEnergi并未令人失望-但它的收音机除外!

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科技纵览 2014年第7期 24-25页

作者： steven a.johnson

2010年8月，我为IEEE Spectrum杂志撰文介绍了我在位于科罗拉多州博尔德的家中安装屋顶太阳能光伏发电系统后第一年的使用情况。在那篇文章发表之后，我又在能效方面进行了些许改进，自此太阳能电池板每年的发电量都比我们实际需要的电... 详细信息

2010年8月，我为IEEE Spectrum杂志撰文介绍了我在位于科罗拉多州博尔德的家中安装屋顶太阳能光伏发电系统后第一年的使用情况。在那篇文章发表之后，我又在能效方面进行了些许改进，自此太阳能电池板每年的发电量都比我们实际需要的电量多出800～850千瓦时。

关键词：混合动力车收音机太阳能光伏发电系统福特驾驶太阳能电池板科罗拉多州 IEEE

Common-path interferometric label-free protein sensing with resonant dielectric nanostructures

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Light(Science & Applications) 2020年第1期9卷 1086-1094页

作者： Isabel Barth Donato Conteduca Christopher Reardon steven johnson Thomas F.Krauss Department of Physics University of YorkYO105DD YorkUK Department of Electronic Engineering University of YorkYO105DD YorkUK

Research toward photonic biosensors for point-of-care applications and personalized medicine is driven by the need for high-sensitivity,low-cost,and reliable *** the most sensitive modalities,interferometry offers particularly high performance,but typically lacks the required operational simplicity and ***,we introduce a common-path interferometric sensor based on guided-mode resonances to combine high performance with inherent *** sensor exploits the simultaneous excitation of two orthogonally polarized modes,and detects the relative phase change caused by biomolecular binding on the sensor *** wide dynamic range of the sensor,which is essential for fabrication and angle tolerance,as well as versatility,is controlled by integrating multiple,tuned structures in the field of *** approach circumvents the trade-off between sensitivity and dynamic range,typical of other phase-sensitive modalities,without increasing *** sensor enables the challenging label-free detection of procalcitonin,a small protein(13 kDa)and biomarker for infection,at the clinically relevant concentration of 1 pg mL^(−1),with a signal-to-noise ratio of *** result indicates the utility for an exemplary application in antibiotic guidance,and opens possibilities for detecting further clinically or environmentally relevant small molecules with an intrinsically simple and robust sensing modality.

关键词： dielectric integrating simplicity

Effects of therapeutic horseback riding on post-traumatic stress disorder in military veterans

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Military Medical Research 2018年第1期5卷 19-32页

作者： Rebecca a.johnson David L.Albright James R.Marzolf Jessica L.Bibbo Hayley D.Yaglom Sandra M.Crowder Gretchen K.Carlisle Amy Willard Cynthia L.Russell Karen Grindler steven Osterlind Marita Wassman Nathan Harms Research Center for Human Animal interaction College of Veterinary Medicine University of Missouri Columbia MO 65211 USA. ResearchService Harry S. Truman Memorial Veterans' Hospital ColumbiaMO 65211 USA. School of Social Work University of AlabamaTuscaloosa AL 35487 USA. Occupational Health Services Harry S. Truman Memorial Veterans' Hospital Columbia MO 65211 USA. Center for the Human-Animal Bond College of Veterinary MedicinePurdue University West Lafayette IN 47907 USA. School of Health Professions University of Missouri Columbia MO 65211 USA. TREE House of Greater St. Louis Wentzville MO 63385 USA. School of Nursing and Health Studies University of Missouri-Kansas CityKansas City MO 64108 USA. Cedar Creek Therapeutic Riding Center Columbia MO 65201 USA. College of Education School and Counseling Psychology University of Missouri Columbia MO 65211USA. Ride-On St. Louis Kimmswick MO 63053 USA.

Background:Large numbers of post-deployment *** are diagnosed with post-traumatic stress disorder(PTSD)and/or traumatic brain injury(TBI),leading to an urgent need for effective interventions to reduce symptoms and increase veterans’*** includes anxiety,flashbacks,and emotional *** symptoms increase health care costs for stress-related illnesses and can make veterans’civilian life ***:We used a randomized wait-list controlled design with repeated measures of *** veterans to address our specific aim to test the efficacy of a 6-week therapeutic horseback riding(THR)program for decreasing PTSD symptoms and increasing coping self-efficacy,emotion regulation,social and emotional *** participants were recruited and 29 enrolled in the randomized *** were randomly assigned to either the horse riding group(n=15)or a wait-list control group(n=14).The wait-list control group experienced a 6-week waiting period,while the horse riding group began *** wait-list control group began riding after 6 weeks of participating in the control *** and health history information was obtained from all the *** symptoms were measured using the standardized PTSD Checklist-Military Version(PCL-M).The PCL-M as well as other instruments including,The Coping Self Efficacy Scale(CSES),The Difficulties in Emotion Regulation Scale(DERS)and The Social and Emotional Loneliness Scale for Adults-short version(SELSA)were used to access different aspects of individual well-being and the PTSD ***:Participants had a statistically significant decrease in PTSD scores after 3 weeks of THR(P≤0.01)as well as a statistically and clinically significant decrease after 6 weeks of THR(P≤0.01).Logistic regression showed that participants had a 66.7%likelihood of having lower PTSD scores at 3 weeks and 87.5%likelihood at 6 *** the generalized linear model(GLM),our ANOVA findings for the coping self

关键词： Animal-assisted intervention Coping self-efficacy Emotion regulation Military veterans Post-traumatic stress disorder Social engagement Therapeutic horseback riding Traumatic brain injury

High-Throughput UAV Image-Based Method Is More Precise Than Manual Rating of Herbicide Tolerance

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Plant Phenomics 2019年第1期1卷 133-141页

作者： Hema S.N.Duddu Eric N.johnson Christian *** steven J.Shirtliffe Department of Plant Sciences College of Agriculture and BioresourcesUniversity of Saskatchewan51 Campus DriveSaskatoonSKCanada

The traditional visual rating system is labor-intensive,time-consuming,and prone to human *** aerial vehicle(UAV)imagery-based vegetation indices(VI)have potential applications in high-throughput plant *** study objective is to determine if UAV imagery provides accurate and consistent estimations of crop injury from herbicide application and its potential as an alternative to visual *** study was conducted at the Kernen Crop Research Farm,University of Saskatchewan in 2016 and ***(Vicia faba L.)crop tolerance to nine herbicide tank mixtures was evaluated with 2 rates distributed in a randomized complete block design(RCBD)with 4 *** trial was imaged using a multispectral camera with a ground sample distance(GSD)of 1.2 cm,one week after the treatment *** ratings of growth reduction and physiological chlorosis were recorded simultaneously with *** optimized soil-adjusted vegetation index(OSAVI)was calculated from the thresholded *** UAV-based vegetation index(OSAVI)produced more precise results compared to visual ratings for both *** coefficient of variation(CV)of OSAVI was~1%when compared to 18-43%for the visual ***,Tukey’s honestly significance difference(HSD)test yielded a more precise mean separation for the UAV-based vegetation index than visual *** significant correlations between OSAVI and the visual ratings from the study suggest that undesirable variability associated with visual assessments can be minimized with the UAVbased ***-based imagery methods had greater precision than the visual-based ratings for crop herbicide *** methods have the potential to replace visual ratings and aid in screening crops for herbicide tolerance.

关键词： Visual precise replace

Active learning of deep surrogates for PDEs:application to metasurface design

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npj Computational Materials 2020年第1期6卷 312-318页

作者： Raphaël Pestourie Youssef Mroueh Thanh V.Nguyen Payel Das steven G.johnson Department of Mathematics Massachusetts Institute of Technology77 Massachusetts AveCambridgeMA 02139USA IBM Research AI IBM Thomas J Watson Research CenterYorktown HeightsYorktownNY 10598USA MIT-IBM Watson AI Lab CambridgeMA 02139USA Iowa State University AmesIA 50011USA

Surrogate models for partial differential equations are widely used in the design of metamaterials to rapidly evaluate the behavior of composable ***,the training cost of accurate surrogates by machine learning can rapidly increase with the number of *** photonic-device models,we find that this training becomes especially challenging as design regions grow larger than the optical *** present an active-learning algorithm that reduces the number of simulations required by more than an order of magnitude for an NN surrogate model of optical-surface components compared to uniform random *** show that the surrogate evaluation is over two orders of magnitude faster than a direct solve,and we demonstrate how this can be exploited to accelerate large-scale engineering optimization.

关键词： optimization surrogate faster

Compact and robust supercontinuum generation and post-compression using multiple thin plates

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High Power Laser Science and Engineering 2021年第4期9卷 234-241页

作者： Xinhua Xie Yunpei Deng steven L.johnson Swiss FEL Paul Scherrer Institute5232 Villi genSwitzerland Institute for Quantum Electronics Physics DepartmentETH ZurichETH Zurich8093 ZurichSwitzerland

We report on compact and robust supercontinuum generation and post-compression using transmission of light through multiple thin solid plates at the Swiss FEL X-ray free-electron laser facility.A single stage consisting of three thin plates followed by a chirped mirror compressor achieves compression of initially 30-fs pulses with 800-nm center wavelength to sub-10-fs *** also demonstrate a two-stage implementation to compress the pulses further to sub-5-fs *** the two-stage setup,the generated supercontinuum includes wavelengths ranging from 500 to 1100 *** multiplate setup is compact,robust,and stable,which makes it ideal for applications at free-electron laser facilities such as pump-probe experiments and laser-arrival timing tools.

关键词： post-compression self-phase modulation supercontinuum generation

Bloch surface eigenstates within the radiation continuum

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Light(Science & Applications) 2013年第1期2卷 113-118页

作者： Chia Wei Hsu Bo Zhen Song-Liang Chua steven G johnson John D Joannopoulos Marin Soljacic Research Laboratory of Electronics Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Physics Harvard UniversityCambridgeMA 02138USA Department of Mathematics Massachusetts Institute of TechnologyCambridgeMA 02139USA

From detailed numerical calculations,we demonstrate that in simple photonic crystal structures,a discrete number of Bloch surface-localized eigenstates can exist inside the continuum of free-space *** to the free space causes the surface modes to leak,but the forward and back-reflected leakage may interfere destructively to create a perfectly bound surface state with zero *** perform analytical temporal coupled-mode theory analysis to show the generality of such phenomenon and its robustness from variations of system ***,time-reversal invariance,two-fold rotational symmetry and a perfectly reflecting boundary are necessary for these unique states.

关键词： bound state in continuum embedded eigenvalue photonic crystal surface mode

Management and evaluation of bladder paragangliomas

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Asian Journal of Urology 2022年第1期9卷 94-96页

作者： Sagar Patel Judy Hamad Matthew E.Nielsen steven johnson System Ringgold Standard Institution University of North CarolinaChapel HillNCUnited States

Dear editor,Extraadrenal paragangliomas are tumors composed of neuroendocrine-derived,catecholamine-secreting chromaffin cells inducing hypertension,palpitations,and diaphoresis[1].Although extraadrenal paragangliomas are found in a variety of anatomic sites that normally host paraganglia—from the carotid body to the abdominal paraaortic region—the bladder is an uncommon location for *** paragangliomas represent approximately 6%of extraadrenal paragangliomas and only 0.05%of all bladder tumors[2,3].We present a rare case of primary paraganglioma affecting the bladder dome.

关键词： bladder glioma adrenal

Generation of millijoule-level sub-5 fs violet laser pulses

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High Power Laser Science and Engineering 2024年第2期12卷 33-40页

作者： Xinhua Xie Yi Hung Yunpei Deng Adrian L.Cavalieri Andrius Baltuška steven L.johnson SwissFEL Paul Scherrer InstituteVilligen PSISwitzerland Photonics Institute Technische Universität WienViennaAustria Institute of Applied Physics University of BernBernSwitzerland Institute for Quantum Electronics Physics DepartmentETH ZurichZurichSwitzerland

We demonstrate the generation,spectral broadening and post-compression of second harmonic pulses using a thin beta barium borate(BBO)crystal on a fused-silica substrate as the nonlinear interaction *** combining second harmonic generation in the BBO crystal with self-phase modulation in the fused-silica substrate,we efficiently generate millijoule-level broadband violet pulses from a single optical *** second harmonic spectrum covers a range from long wave ultraviolet(down to 310 nm)to visible(up to 550 nm)with a bandwidth of 65 ***,we compress the second harmonic beam to a duration of 4.8 fs with a pulse energy of 0.64 mJ(5 fs with a pulse energy of 1.05 mJ)using chirped *** all-solid free-space apparatus is compact,robust and pulse energy scalable,making it highly advantageous for generating intense second harmonic pulses from near-infrared femtosecond lasers in the sub-5 fs regime.

关键词： post-compression second harmonic generation self-phase modulation supercontinuum generation