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https://www.readbyqxmd.com/read/28317985/hierarchical-porous-ni-boehmite-nickel-aluminum-oxide-flakes-with-enhanced-microwave-absorption-ability
#1
Biao Zhao, Junwei Liu, Xiaoqin Guo, Wanyu Zhao, Luyang Liang, Chao Ma, Rui Zhang
In this article, composites consisting of porous Ni cores coated with boehmite/nickel aluminum oxide nanoflakes were successfully prepared by a versatile method. The crystal constituents and shapes of the boehmite/nickel aluminum oxide nanoflakes were strongly influenced by reaction temperature, and their microwave absorption properties were investigated in terms of complex permittivity and permeability. The results reveal that the composites comprising porous Ni cores coated with boehmite/nickel aluminum oxide synthesized at 180 °C present superior absorption properties...
March 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28315390/quantifying-the-dynamic-density-driven-convection-in-high-permeability-packed-beds
#2
Ying Teng, Lanlan Jiang, Yingting Fan, Yu Liu, Dayong Wang, Abuliti Abudula, Yongchen Song
The density driven convection phenomenon is expected to have a significant and positive role in CO2 geological storage capacity and safety. The onset and development of density-driven convective on the core scale is critical to understand the mass transfer mechanism. In this paper, laboratory experiments were conducted to investigate the density-driven convective in a vertical tube. The deuterium oxide (D2O)/manganese chloride (MnCl2) water solution in water or brine were as an analog for CO2-rich brine in original brine...
March 14, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28303652/photoperiod-cues-and-patterns-of-genetic-variation-limit-phenological-responses-to-climate-change-in-warm-parts-of-species-range-modeling-diameter-growth-cessation-in-coast-douglas-fir
#3
Kevin R Ford, Constance A Harrington, J Bradley St Clair
The phenology of diameter-growth cessation in trees will likely play a key role in mediating species and ecosystem responses to climate change. A common expectation is that warming will delay cessation, but the environmental and genetic influences on this process are poorly understood. We modeled the effects of temperature, photoperiod and seed-source climate on diameter-growth cessation timing in coast Douglas-fir (an ecologically and economically vital tree) using high-frequency growth measurements across broad environmental gradients for a range of genotypes from different seed sources...
March 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28297956/wideband-analytical-equivalent-circuit-for-coupled-asymmetrical-nonaligned-slit-arrays
#4
Carlos Molero, Raúl Rodríguez-Berral, Francisco Mesa, Francisco Medina
Microstructured metallic devices have been extensively studied because of their interesting properties for controlling the transmission, reflection, and absorption of electromagnetic waves. A very simple implementation is an array of infinitely long parallel metal strips printed on a dielectric substrate. In the past few years, several analytical models have been reported based on the use of equivalent circuits with distributed and lumped components to account for the electrical performance of these structures...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28295565/characterization-of-left-ventricle-energy-loss-in-healthy-adults-using-vector-flow-mapping-preliminary-results
#5
Lei Xu, Chao Sun, Xiaoli Zhu, Weihua Liu, Shengjun Ta, Dan Zhao, Feifei Wang, Liwen Liu
BACKGROUND: Energy loss (EL) is a new quantitative hemodynamic index based on vector flow mapping (VFM). This study aimed to characterize EL of the left ventricle (LV) in healthy adults. METHODS: Fifty-one healthy adults were enrolled in this study. EL of LV was analyzed frame by frame using color Doppler images of a standard apical three-chamber dynamic view on an offline VFM workstation. The average EL of systole and diastole was calculated, and the results were averaged over three cardiac cycles...
March 14, 2017: Echocardiography
https://www.readbyqxmd.com/read/28295091/propagation-of-optical-vortices-in-a-nonlinear-atomic-medium-with-a-photonic-band-gap
#6
Zhaoyang Zhang, Danmeng Ma, Yiqi Zhang, Mingtao Cao, Zhongfeng Xu, Yanpeng Zhang
We experimentally generate a vortex beam through a four-wave mixing (FWM) process after satisfying the phase-matching condition in a rubidium atomic vapor cell with a photonic band gap (PBG) structure. The observed FWM vortex can also be viewed as the reflected part of the launched probe vortex from the PBG. Further, we investigate the propagation behaviors, including the spatial shift and splitting of the probe and FWM vortices in the medium with enhanced Kerr nonlinearity induced by electromagnetically induced transparency...
March 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28294578/rethinking-thresholds-for-serological-evidence-of-influenza-virus-infection
#7
Xiahong Zhao, Karen Siegel, Mark I-Cheng Chen, Alex R Cook
INTRODUCTION: For pathogens such as influenza that cause many sub-clinical cases, serologic data can be used to estimate attack rates and the severity of an epidemic in near real-time. Current methods for analysing serologic data tend to rely on use of a simple threshold or comparison of titers between pre- and post-epidemic, which may not accurately reflect actual infection rates. METHODS: We propose a method for quantifying infection rates using paired sera and bivariate probit models to evaluate the accuracy of thresholds currently used for influenza epidemics with low and high existing herd immunity levels, and a subsequent non-influenza period...
March 13, 2017: Influenza and Other Respiratory Viruses
https://www.readbyqxmd.com/read/28290876/-circadian-clock-gene-variants-parameters-of-arterial-stiffness-and-blood-pressure-levels-in-subjects-without-arterial-hypertension
#8
V A Korneva, I V Kurbatova, L V Topchieva, S N Kolomeichuk, T Yu Kuznetsova, N N Nemova
CLOCK gene polymorphic variants, parameters of arterial stiffness and blood pressure (BP) variability were studied in 115 normotensive Russian patients without cardiovascular diseases (62 men, 53 women; mean age 36.4+/-1.01 years). Examination included ECG, 24h BP monitoring, duplex scan of carotid arteries, registration of vascular stiffness parameters, and genotyping of the following polymorphic markers of CLOCK: 3111T>C (3-untranslated region), 862T>C (exon 9) and 257T>G (promoter region) by PCR-RFLP method...
August 2016: Kardiologiia
https://www.readbyqxmd.com/read/28289914/firecracker-eye-exposure-experimental-study-and-simulation
#9
Chiara Clemente, Luca Esposito, Domenico Speranza, Nicola Bonora
Understanding the mechanisms of traumatic ocular injury is helpful to make accurate diagnoses before the symptoms emerge and to develop specific eye protection. The comprehension of the dynamics of primary blast injury mechanisms is a challenging issue. The question is whether the pressure wave propagation and reflection alone could cause ocular damage. To date, there are dissenting opinions and no conclusive evidence thereupon. A previous numerical investigation of blast trauma highlighted the dynamic effect of pressure propagation and its amplification by the geometry of the bony orbit, inducing a resonance cavity effect and a standing wave hazardous for eye tissues...
March 13, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28288635/urban-rural-disparities-in-hypertension-prevalence-detection-and-medication-use-among-chinese-adults-from-1993-to-2011
#10
Jiajia Li, Leiyu Shi, Shixue Li, Lingzhong Xu, Wen Qin, Heng Wang
BACKGROUND: China has experienced a rapid increase in hypertension over the past decade, especially in rural. Therefore, the aim of this research is to examine the dynamic trends in urban-rural disparities in hypertension prevalence, detection, and medication use among Chinese adults from 1993 to 2011. METHODS: Data were extracted from the seven latest waves of the China Health and Nutrition Survey (CHNS). We used the hukou system to distinguish between urban and rural residents...
March 14, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/28288315/social-capital-deprivation-and-self-rated-health-does-reporting-heterogeneity-play-a-role-results-from-the-english-longitudinal-study-of-ageing
#11
M G O'Doherty, D French, A Steptoe, F Kee
Self-rated health (SRH) is commonly assessed in large surveys, though responses can be influenced by different individuals' perceptions of and beliefs about health. Therefore, instead of providing evidence of 'true' health disparities across groups, findings may actually reflect reporting heterogeneity. Using data from participants aged 50 years and older from the English Longitudinal Study of Ageing (ELSA) Wave 3 (2006/07; participation rate = 73%), associations between three dimensions of social capital (local area & trust, social support and social networks), deprivation and SRH were examined using the vignette methodology in 2341 individuals who completed both the self-report and at least one of the 18 vignettes...
March 6, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28287231/failure-mechanisms-of-air-entrainment-in-drop-impact-on-lubricated-surfaces
#12
M Pack, H Hu, D Kim, Z Zheng, H A Stone, Y Sun
Lubricated surfaces have recently been introduced and studied due to their potential benefit in various configurations and applications. Combining the techniques of total internal reflection microscopy and reflection interference microscopy, we examine the dynamics of an underlying air film upon drop impact on a lubricated substrate where the thin liquid film is immiscible to the drop. In contrast to drop impact on solid surfaces where even the smallest asperities cause random breakup of the entraining air film, we report two air film failure mechanisms on lubricated surfaces...
March 13, 2017: Soft Matter
https://www.readbyqxmd.com/read/28287173/single-mode-interface-states-in-heterostructure-waveguides-with-bragg-and-non-bragg-gaps
#13
Ya-Xian Fan, Tang-Qing Sang, Ting Liu, Lan-Lan Xu, Zhi-Yong Tao
Interface states can always arise in heterostructures that consist of two or more (artificial) materials with topologically different energy bands. The gapped band structure can be classified by the Chern number (a topological invariant) generally or the Zak phase in one-dimensional periodic systems. Recently, topological properties have been employed to investigate the interface states occurring at the connecting regions of the heterostructures of mechanical isostatic lattices and acoustical waveguides. Here, we study this heterostructure phenomenon by carefully connecting two corrugated stainless steel waveguides with Bragg and non-Bragg gaps at approximately the same frequency...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28286366/relations-among-auditory-brainstem-and-middle-latency-response-measures-categorical-loudness-judgments-and-their-associated-physical-intensities
#14
REVIEW
Peggy A Korczak, LaGuinn P Sherlock, Monica L Hawley, Craig Formby
This study characterizes changes in response properties of toneburst-evoked auditory brainstem responses (ABRs) and/or middle latency responses (MLRs) as a function of perceived loudness and physical intensity of these stimuli and delineates the range of levels corresponding to categorical loudness judgments for these stimuli. ABRs/MLRs were recorded simultaneously to 500- and 2,000-Hz tonebursts in 10 normal-hearing adults at levels corresponding to each listener's loudness judgments for four categories on Contour Test of Loudness...
February 2017: Seminars in Hearing
https://www.readbyqxmd.com/read/28286365/auditory-brainstem-and-middle-latency-responses-measured-pre-and-posttreatment-for-hyperacusic-hearing-impaired-persons-successfully-treated-to-improve-sound-tolerance-and-to-expand-the-dynamic-range-for-loudness-case-evidence
#15
REVIEW
Craig Formby, Peggy Korczak, LaGuinn P Sherlock, Monica L Hawley, Susan Gold
In this report of three cases, we consider electrophysiologic measures from three hyperacusic hearing-impaired individuals who, prior to treatment to expand their dynamic ranges for loudness, were problematic hearing aid candidates because of their diminished sound tolerance and reduced dynamic ranges. Two of these individuals were treated with structured counseling combined with low-level broadband sound therapy from bilateral sound generators and the third case received structured counseling in combination with a short-acting placebo sound therapy...
February 2017: Seminars in Hearing
https://www.readbyqxmd.com/read/28283318/changes-in-predictive-cuing-modulate-the-hemispheric-distribution-of-the-p1-inhibitory-response-to-attentional-targets
#16
Stefano Lasaponara, Marianna D' Onofrio, Alessio Dragone, Mario Pinto, Ludovica Caratelli, Fabrizio Doricchi
Brain activity related to orienting of attention with spatial cues and brain responses to attentional targets are influenced the probabilistic contingency between cues and targets. Compared to predictive cues, cues predicting at chance the location of targets reduce the filtering out of uncued locations and the costs in reorienting attention to targets presented at these locations. Slagter et al. (2016) have recently suggested that the larger target related P1 component that is found in the hemisphere ipsilateral to validly cued targets reflects stimulus-driven inhibition in the processing of the unstimulated side of space contralateral to the same hemisphere...
March 7, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28282618/integrating-multiple-stressors-across-life-stages-and-latitudes-combined-and-delayed-effects-of-an-egg-heat-wave-and-larval-pesticide-exposure-in-a-damselfly
#17
Szymon Sniegula, Lizanne Janssens, Robby Stoks
To understand the effects of pollutants in a changing world we need multistressor studies that combine pollutants with other stressors associated with global change such as heat waves. We tested for the delayed and combined impact of a heat wave during the egg stage and subsequent sublethal exposure to the pesticide esfenvalerate during the larval stage on life history and physiology in the larval and adult stage of the damselfly Lestes sponsa. We studied this in a common garden experiment with replicated central- and high latitude populations to explore potential effects of local thermal adaptation and differences in life history shaping the multistressor responses...
March 1, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28281320/measuring-choice-for-adults-with-an-intellectual-disability-a-factor-analysis-of-the-adapted-daily-choice-inventory-scale
#18
M-A O'Donovan, E Byrne, P McCallion, M McCarron
BACKGROUND: For most people, choice making is an everyday occurrence, but for adults with an intellectual disability (ID), such opportunities are often limited, if not, absent. Defining choice, and related opportunity capacity and supports continue to feature prominently in academic, practice and policy discourse within the field of ID as reflected in the range of measures available. This paper examines the factor analytic properties of an adapted 14-item choice inventory scale. METHOD: Presence and type of choice were recorded in wave 1 of the Intellectual Disability Supplement to the Irish Longitudinal Study on Ageing using a choice inventory scale adapted for the Irish context for 753 participants with ID over age 40 years...
March 9, 2017: Journal of Intellectual Disability Research: JIDR
https://www.readbyqxmd.com/read/28280753/mouse-auditory-brainstem-response-testing
#19
Omar Akil, A E Oursler, Kevin Fan, Lawrence R Lustig
The auditory brainstem response (ABR) test provides information about the inner ear (cochlea) and the central pathways for hearing. The ABR reflects the electrical responses of both the cochlear ganglion neurons and the nuclei of the central auditory pathway to sound stimulation (Zhou et al., 2006; Burkard et al., 2007). The ABR contains 5 identifiable wave forms, labeled as I-V. Wave I represents the summated response from the spiral ganglion and auditory nerve while waves II-V represent responses from the ascending auditory pathway...
March 20, 2016: Bio-protocol
https://www.readbyqxmd.com/read/28273568/blast-wave-dynamics-the-influence-of-the-shape-of-the-explosive
#20
J Artero-Guerrero, J Pernas-Sánchez, F Teixeira-Dias
A numerical model is developed to analyse the influence of the shape of a high-explosive on the dynamics of the generated pressure wave. A Multi-Material Arbitrary Lagrangian Eulerian (MM-ALE) technique is used as the CONWEP approach is not adequate to model such situations. Validation and verification of the proposed numerical model is achieved based on experimental data obtained from the bibliography. The numerical model provides relevant information that cannot be obtained from the experimental results. The influence of the mass and shape of the high-explosive is studied and correlated to the dynamics of the generated blast wave through the analysis of peak pressures, time of arrival and impulse...
February 24, 2017: Journal of Hazardous Materials
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