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https://www.readbyqxmd.com/read/28438007/high-speed-cleaving-of-crystals-with-ultrafast-bessel-beams
#1
L Rapp, R Meyer, L Furfaro, C Billet, R Giust, F Courvoisier
We develop a novel concept for ultra-high speed cleaving of crystalline materials with femtosecond lasers. Using Bessel beams in single shot, fracture planes can be induced nearly all along the Bessel zone in sapphire. For the first time, we show that only for a pulse duration below 650 fs, a single fracture can be induced in sapphire, while above this duration, cracks appear in all crystallographic orientations. We determine the influential parameters which are polarization direction, crystallographic axes and scanning direction...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437997/effect-of-zno-nanostructures-on-the-optical-properties-of-white-light-emitting-diodes
#2
Longshi Rao, Yong Tang, ZongTao Li, Xinrui Ding, Jiasheng Li, Shudong Yu, Caiman Yan, Hangaung Lu
White light produced by blue LEDs with yellow phosphor is the most widely used methods, but it results in poor quality in angular CCT uniformity. In this work, a novel technique was introduced to solve this problem by integrating different ZnO nanostructures into white light-emitting diodes. The experiment of ZnO doped films and the simulation of Finite-Difference Time-Domain (FDTD) were carried out. The result indicated scattering effect of ZnO nanoparticles could improve uniformity of scattering energy effectively...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437930/si-traceable-measurement-of-an-optical-frequency-at-the-low-10-sup-16-sup-level-without-a-local-primary-standard
#3
Hidekazu Hachisu, Gérard Petit, Fumimaru Nakagawa, Yuko Hanado, Tetsuya Ido
SI-traceable measurements of optical frequencies using International Atomic Time (TAI) do not require a local primary frequency reference, but suffer from an uncertainty in tracing to the SI second. For the measurement of the <sup>87</sup>Sr lattice clock transition, we have reduced this uncertainty to the low 10<sup>-16</sup> level by averaging three sets of ten-day intermittent measurements, in which we operated the lattice clock for 10<sup>4</sup> s on each day. Moreover, a combined oscillator of two hydrogen masers was employed as a local flywheel oscillator (LFO) in order to mitigate the impact of sporadic excursion of LFO frequency...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437917/vector-radiative-transfer-model-for-coupled-atmosphere-and-ocean-systems-including-inelastic-sources-in-ocean-waters
#4
Peng-Wang Zhai, Yongxiang Hu, David M Winker, Bryan A Franz, Jeremy Werdell, Emmanuel Boss
Inelastic scattering plays an important role in ocean optics. The main inelastic scattering mechanisms include Raman scattering, fluorescence by colored dissolved organic matter (FDOM), and fluorescence by chlorophyll. This paper reports an implementation of all three inelastic scattering mechanisms in the exact vector radiative transfer model for coupled atmosphere and ocean Systems (CAOS). Simulation shows that FDOM contributes to the water radiation field in the broad visible spectral region, while chlorophyll fluorescence is limited in a narrow band centered at 685 nm...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437867/robustness-assessment-of-urban-road-network-with-consideration-of-multiple-hazard-events
#5
Yaoming Zhou, Jiuh-Biing Sheu, Junwei Wang
Robustness measures a system's ability of being insensitive to disturbances. Previous studies assessed the robustness of transportation networks to a single disturbance without considering simultaneously happening multiple events. The purpose of this article is to address this problem and propose a new framework to assess the robustness of an urban transportation network. The framework consists of two layers. The upper layer is to define the robustness index based on the impact evaluation in different scenarios obtained from the lower layer, whereas the lower layer is to evaluate the performance of each hypothetical disrupted road network given by the upper layer...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437857/influence-of-inflammation-and-nitric-oxide-upon-platelet-aggregation-following-deposition-of-diesel-exhaust-particles-in-the-airways
#6
E Smyth, A Solomon, M A Birrell, M J Smallwood, P G Winyard, T D Tetley, M Emerson
BACKGROUND AND PURPOSE: Exposure to nanoparticulate pollution has been implicated in platelet-driven thrombotic events such as myocardial infarction. Inflammation and impairment of nitric oxide (NO) bioavailability have been proposed as potential causative mechanisms. It is unclear, however, whether airways exposure to combustion-derived nanoparticles such as diesel exhaust particles (DEP) or carbon black (CB) can augment platelet aggregation in vivo and the underlying mechanisms remain undefined...
April 24, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28437850/public-perception-of-uncertainties-within-climate-change-science
#7
Vivianne H M Visschers
Climate change is a complex, multifaceted problem involving various interacting systems and actors. Therefore, the intensities, locations, and timeframes of the consequences of climate change are hard to predict and cause uncertainties. Relatively little is known about how the public perceives this scientific uncertainty and how this relates to their concern about climate change. In this article, an online survey among 306 Swiss people is reported that investigated whether people differentiate between different types of uncertainty in climate change research...
April 24, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/28437846/pain-sensitization-is-associated-with-disease-activity-in-rheumatoid-arthritis-patients-a-cross-sectional-study
#8
Yvonne C Lee, Clifton O Bingham, Robert R Edwards, Wendy Marder, Phillips Kristine, Marcy B Bolster, Daniel J Clauw, Larry W Moreland, Bing Lu, Alyssa Wohlfahrt, Zhi Zhang, Tuhina Neogi
OBJECTIVE: Pain sensitization may contribute to pain severity in rheumatoid arthritis (RA), impacting assessment of disease activity. We examined whether pain processing mechanisms were associated with disease activity among RA patients with active disease. METHODS: This study includes 139 subjects enrolled in the Central Pain in Rheumatoid Arthritis cohort. Subjects underwent quantitative sensory testing (QST), including assessment of pressure pain thresholds (PPTs) at multiple sites, conditioned pain modulation, and temporal summation...
April 24, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28437823/-medicolegal-assessment-of-psychic-sequelae-after-minor-traumatic-events
#9
Bernhard Widder
The majority of medicolegal assessments in claimed psychic sequelae after accidents concerns minor traumatic events. In this case, the focus is on three questions: Was the event appropriate to cause a traumatic disturbance according to current psychiatric classification systems (especially current DSM-5)? Which psychical or physical initial injury can be proven beyond reasonable doubt ("full proof") according to German law? What is the impact of personality characteristics and competing life events in the development and maintenance of the mental disorder? Causality between mental disorders and minor traumatic events is to be confirmed especially in the case of persistent physical accident sequelae, but attention has to be paid to the differences in the various legal requirements...
April 2017: Fortschritte der Neurologie-Psychiatrie
https://www.readbyqxmd.com/read/28437778/strengthening-governance-for-intertidal-ecosystems-requires-a-consistent-definition-of-boundaries-between-land-and-sea
#10
Stefanie M Rog, Carly N Cook
The protection of intertidal ecosystems is complex because they straddle both marine and terrestrial realms. This leads to inconsistent characterisation as marine and/or terrestrial systems, or neither. Vegetated intertidal ecosystems are especially complex to classify because they can have an unclear border with terrestrial vegetation, causing confusion around taxonomy (e.g., mangrove-like plants). This confusion and inconsistency in classification can impact these systems through poor governance and incomplete protection...
April 21, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28437773/are-hospital-emergency-department-visits-due-to-dog-bites-associated-with-ambient-temperature-a-time-series-study-in-beijing-china
#11
Yongming Zhang, Qi Zhao, Wenyi Zhang, Shanshan Li, Gongbo Chen, Zhihai Han, Yuming Guo
BACKGROUND: It is well documented that suboptimal ambient temperature is associated with cardiovascular and respiratory diseases. However, no study has examined the relation between temperature and dog bites. OBJECTIVES: To study the association between ambient temperature and daily hospital emergency department visits due to dog bites (EDVDBs) in Beijing, China; and to explore whether the temperature-EDVDB association varies by sex and age. METHODS: Daily EDVDBs were collected from a hospital appointed for dog bites in Beijing during 2012-2014...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28437771/solvent-bar-micro-extraction-sbme-based-determination-of-pahs-in-seawater-samples
#12
José A López-López, Esther Ogalla-Chozas, Pablo A Lara-Martín, Marina G Pintado-Herrera
Measuring the impact of PAHs in seawater samples is often difficult due to the low concentrations in which they appear and the complexity of the sample matrix. Traditional methods for sample preparation such as liquid-liquid extraction and solid phase extraction require the use of excessive amounts of solvents and reagents, and sample handling. In this work, hollow fiber liquid phase micro-extraction (HFLPME), in the configuration of solvent bar micro-extraction (SBME), was proposed as an environmentally friendly and more effective tool, for the extraction of the 16 priority PAHs from seawater samples...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28437765/suicidality-associated-with-ptsd-depression-and-disaster-recovery-status-among-adult-survivors-8-years-after-the-2008-wenchuan-earthquake-in-china
#13
Jing Guo, Huan He, Mingqi Fu, Ziqiang Han, Zhiyong Qu, Xiaohua Wang, Liding Guan
It has been eight years since the Wenchuan earthquake. We don't know how the lives of those affected by the disaster may remain blighted by its effects, or how many remain thus affected. The aim of the present study was to examine the relationship of disaster exposure, PTSD, depression and suicidal behaviors, using data from a cross-sectional survey conducted in earthquake-affected areas of China. 1369 participants were recruited from two different sites that were severely affected by the Wenchuan earthquake...
April 12, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28437763/depression-and-insomnia-as-mediators-of-the-relationship-between-distress-and-quality-of-life-in-cancer-patients
#14
Kyeong Min Cha, Young Ki Chung, Ki Young Lim, Jae Sung Noh, Mison Chun, So Yeon Hyun, Dae Ryong Kang, Min Jung Oh, Nam Hee Kim
BACKGROUND: Distress in cancer patients leads to poorer quality of life (QOL) and negatively impacts survival. For efficient management of a patient's disease course, the interrelationships among distress, depression, insomnia, and QOL must be understood. This study aimed to investigate whether depression and insomnia mediate the relationship between distress and QOL in cancer patients. METHODS: Cancer patients referred to a specialized psycho-oncology clinic (n=208) participated in this study...
April 17, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28437762/public-attitudes-toward-depression-and-help-seeking-impact-of-the-ospi-europe-depression-awareness-campaign-in-four-european-regions
#15
Elisabeth Kohls, Evelien Coppens, Juliane Hug, Eline Wittevrongel, Chantal Van Audenhove, Nicole Koburger, Ella Arensman, András Székely, Ricardo Gusmão, Ulrich Hegerl
BACKGROUND: Public attitudes toward depression and help-seeking behaviour are important factors influencing depressed people to obtain professional help and adequate treatment. OSPI-Europe is a multi-level suicide prevention programme including a public awareness campaign. It was implemented in four regions of four European countries (Germany, Hungary, Ireland and Portugal). This paper reports the results of the evaluation of the campaign, including its visibility and effects of the campaign on stigma associated with depression and help-seeking behaviour...
April 8, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28437743/eco-pharmacovigilance-of-non-steroidal-anti-inflammatory-drugs-necessity-and-opportunities
#16
REVIEW
Bing-Shu He, Jun Wang, Juan Liu, Xia-Min Hu
Eco-pharmacovigilance (EPV) is a practical and powerful approach to minimize the potential risks posed by pharmaceutical residues in environment. However, it is impracticable to practise rigorous and unitary EPV process for all the existing and new pharmaceuticals. Here, we focused on non-steroidal anti-inflammatory drugs (NSAIDs), and discussed the necessity and potential opportunities of practising EPV of NSAIDs. We found that the consumption of NSAIDs is huge and ubiquitous across the globe. NSAIDs were worldwidely reported as one of the most dominant and frequently detected groups in environmental matrices including wastewater, surface water, suspended solids, sediments, groundwater, even drinking water...
April 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437741/use-of-nuclear-receptor-luciferase-based-bioassays-to-detect-endocrine-active-chemicals-in-a-biosolids-biochar-amended-soil
#17
Carolyn G Anderson, Geetika Joshi, Daniel A Bair, Charlotte Oriol, Guochun He, Sanjai J Parikh, Michael S Denison, Kate M Scow
Biosolids are a potentially valuable source of carbon and nutrients for agricultural soils; however, potential unintended impacts on human health and the environment must be considered. Virtually all biosolids contain trace amounts endocrine-disrupting chemicals derived from human use of pharmaceuticals and personal care products (PPCPs). One potential way to reduce the bioavailability of PPCPs is to co-apply biosolids with biochar to soil, because biochar's chemical (e.g., aromaticity) and physical properties (e...
April 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437740/stabilization-of-metal-loid-s-in-two-contaminated-agricultural-soils-comparing-biochar-to-its-non-pyrolysed-source-material
#18
Lukáš Trakal, Irene Raya-Moreno, Kerry Mitchell, Luke Beesley
Two metal(loid) contaminated agricultural soils were amended with grape stalk (wine production by-product)-derived biochar as well as its pre-pyrolysed origin material, to investigate their geochemical impacts on As, Cr, Cu and Zn. Detailed physico-chemical evaluation combined with a column leaching test determined the retention of metal(loid)s from soil solution by each amendments. A pot experiment measured metal(loid)s in soil pore water and their uptake to ryegrass when the amendments were mixed into soils at 1 and 5% (w/w)...
April 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28437734/idf-diabetes-atlas-global-estimates-for-the-prevalence-of-diabetes-for-2015-and-2040
#19
K Ogurtsova, J D da Rocha Fernandes, Y Huang, U Linnenkamp, L Guariguata, N H Cho, D Cavan, J E Shaw, L E Makaroff
AIM: To produce current estimates of the national, regional and global impact of diabetes for 2015 and 2040. METHODS: A systematic literature review was conducted to identify data sources on the prevalence of diabetes from studies conducted in the period from 1990 to 2015. An analytic hierarchy process was used to select the most appropriate studies for each country, and estimates for countries without data were modelled using extrapolation from similar countries that had available data...
March 31, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28437730/the-practice-of-prosecuting-child-maltreatment-results-of-an-online-survey-of-prosecutors
#20
Theodore P Cross, Debra Whitcomb
Despite efforts by advocates, practitioners, and legislators to alleviate the burden on child maltreatment victims in the criminal justice system, many challenges remain for prosecutors as they seek to hold offenders accountable while minimizing the emotional impact on children. More than 200 state and local prosecutors in 37 states responded to an online survey to share their perspectives on current challenges, procedures to support children in the adjudication process, and the impact of the U.S. Supreme Court opinion in Crawford v...
April 21, 2017: Child Abuse & Neglect
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