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https://www.readbyqxmd.com/read/28208446/effective-distances-for-epidemics-spreading-on-complex-networks
#1
Flavio Iannelli, Andreas Koher, Dirk Brockmann, Philipp Hövel, Igor M Sokolov
We show that the recently introduced logarithmic metrics used to predict disease arrival times on complex networks are approximations of more general network-based measures derived from random walks theory. Using the daily air-traffic transportation data we perform numerical experiments to compare the infection arrival time with this alternative metric that is obtained by accounting for multiple walks instead of only the most probable path. The comparison with direct simulations reveals a higher correlation compared to the shortest-path approach used previously...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28208351/effects-of-burstiness-on-the-air-transportation-system
#2
Hidetaka Ito, Katsuhiro Nishinari
The effects of burstiness in complex networks have received considerable attention. In particular, the effects on temporal distance and delays in the air transportation system are significant owing to their huge impact on our society. Therefore, in this paper, the temporal distance of empirical U.S. flight schedule data is compared with that of regularized data without burstiness to analyze the effects of burstiness. The temporal distance is calculated by a graph analysis method considering flight delays, missed connections, flight cancellations, and congestion...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28207853/numerical-simulations-of-atmospheric-dispersion-of-iodine-131-by-different-models
#3
Ádám Leelőssy, Róbert Mészáros, Attila Kovács, István Lagzi, Tibor Kovács
Nowadays, several dispersion models are available to simulate the transport processes of air pollutants and toxic substances including radionuclides in the atmosphere. Reliability of atmospheric transport models has been demonstrated in several recent cases from local to global scale; however, very few actual emission data are available to evaluate model results in real-life cases. In this study, the atmospheric dispersion of 131I emitted to the atmosphere during an industrial process was simulated with different models, namely the WRF-Chem Eulerian online coupled model and the HYSPLIT and the RAPTOR Lagrangian models...
2017: PloS One
https://www.readbyqxmd.com/read/28202725/stretchable-living-materials-and-devices-with-hydrogel-elastomer-hybrids-hosting-programmed-cells
#4
Xinyue Liu, Tzu-Chieh Tang, Eléonore Tham, Hyunwoo Yuk, Shaoting Lin, Timothy K Lu, Xuanhe Zhao
Living systems, such as bacteria, yeasts, and mammalian cells, can be genetically programmed with synthetic circuits that execute sensing, computing, memory, and response functions. Integrating these functional living components into materials and devices will provide powerful tools for scientific research and enable new technological applications. However, it has been a grand challenge to maintain the viability, functionality, and safety of living components in freestanding materials and devices, which frequently undergo deformations during applications...
February 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28202268/three-dimensional-investigation-of-ozone-pollution-in-the-lower-troposphere-using-an-unmanned-aerial-vehicle-platform
#5
Xiao-Bing Li, Dong-Sheng Wang, Qing-Chang Lu, Zhong-Ren Peng, Si-Jia Lu, Bai Li, Chao Li
Potential utilities of instrumented lightweight unmanned aerial vehicles (UAVs) to quickly characterize tropospheric ozone pollution and meteorological factors including air temperature and relative humidity at three-dimensional scales are highlighted in this study. Both vertical and horizontal variations of ozone within the 1000 m lower troposphere at a local area of 4 × 4 km(2) are investigated during summer and autumn times. Results from field measurements show that the UAV platform has a sufficient reliability and precision in capturing spatiotemporal variations of ozone and meteorological factors...
February 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28199875/examining-the-impacts-of-increased-corn-production-on-groundwater-quality-using-a-coupled-modeling-system
#6
Valerie Garcia, Ellen Cooter, James Crooks, Brian Hinckley, Mark Murphy, Xiangnan Xing
This study demonstrates the value of a coupled chemical transport modeling system for investigating groundwater nitrate contamination responses associated with nitrogen (N) fertilizer application and increased corn production. The coupled Community Multiscale Air Quality Bidirectional and Environmental Policy Integrated Climate modeling system incorporates agricultural management practices and N exchange processes between the soil and atmosphere to estimate levels of N that may volatilize into the atmosphere, re-deposit, and seep or flow into surface and groundwater...
February 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28199861/the-vato-project-development-and-validation-of-a-dynamic-transfer-model-of-tritium-in-grassland-ecosystem
#7
S Le Dizès, C Aulagnier, D Maro, M Rozet, F Vermorel, D Hébert, C Voiseux, L Solier, C Godinot, B Fievet, P Laguionie, O Connan, O Cazimajou, M Morillon
In this paper, a dynamic compartment model with a high temporal resolution has been investigated to describe tritium transfer in grassland ecosystems exposed to atmospheric (3)H releases from nuclear facilities under normal operating or accidental conditions. TOCATTA-χ model belongs to the larger framework of the SYMBIOSE modelling and simulation platform that aims to assess the fate and transport of a wide range of radionuclides in various environmental systems. In this context, the conceptual and mathematical models of TOCATTA-χ have been designed to be relatively simple, minimizing the number of compartments and input parameters required...
February 12, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28195733/unidirectional-wetting-of-liquids-on-janus-nanostructure-arrays-under-various-media
#8
Peng Ge, Shuli Wang, Wendong Liu, Tieqiang Wang, Nianzuo Yu, Shunsheng Ye, Huaizhong Shen, Yuxin Wu, Junhu Zhang, Bai Yang
In this paper, we report the unidirectional wetting behavior of liquids (water and oil) on Janus silicon cylinder arrays (Si-CAs) under various media (air, water, and oil). The Janus cylinders were prepared by chemical modification of nano-cylinders with different molecules on two sides. Through adjusting surface energies of the modified molecules, the as-prepared surfaces could control the wetting behavior of different types of liquids under various media. Herein, we discuss the regularity systematically and propose a strategy for preparing anisotropic wetting surfaces under arbitrary media...
February 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28195286/cesium-lead-iodide-solar-cells-controlled-by-annealing-temperature
#9
Yu Geun Kim, Tae-Yoon Kim, Jeong Hyeon Oh, Kyoung Soon Choi, Youn-Jea Kim, Soo Young Kim
An inorganic lead halide perovskite film, CsPbI3, used as an absorber in perovskite solar cells (PSCs) was optimized by controlling the annealing temperature and the layer thickness. The CsPbI3 layer was synthesized by one-step coating of CsI mixed with PbI2 and a HI additive in N,N-dimethylformamide. The annealing temperature of the CsPbI3 film was varied from 80 to 120 °C for different durations and the thickness was controlled by changing the spin-coating rpm. After annealing the CsPbI3 layer at 100 °C under dark conditions for 10 min, a black phase of CsPbI3 was formed and the band gap was 1...
February 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28194081/excessive-sleepiness-sleep-hygiene-and-coping-strategies-among-night-bus-drivers-a-cross-sectional-study
#10
Uma Maheswari Krishnaswamy, Mamta S Chhabria, Aditi Rao
BACKGROUND: Sleep disruption and excessive sleepiness are the known consequences of shift work. The recent spate of night-time road and air accidents, with some being directly attributed to driver sleepiness prompted us to undertake this study. AIMS: To screen for excessive sleepiness, coping practices, and post-shift sleep hygiene in night bus drivers. SETTINGS AND DESIGN: This prospective study was carried out on night bus drivers of a public transport organization in Bengaluru, Karnataka, India...
May 2016: Indian Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28193153/molecular-evolution-of-globin-genes-in-gymnotiform-electric-fishes-relation-to-hypoxia-tolerance
#11
Ran Tian, Mauricio Losilla, Ying Lu, Guang Yang, Harold Zakon
BACKGROUND: Nocturnally active gymnotiform weakly electric fish generate electric signals for communication and navigation, which can be energetically taxing. These fish mainly inhabit the Amazon basin, where some species prefer well-oxygenated waters and others live in oxygen-poor, stagnant habitats. The latter species show morphological, physiological, and behavioral adaptations for hypoxia-tolerance. However, there have been no studies of hypoxia tolerance on the molecular level. Globins are classic respiratory proteins...
February 13, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28192650/facile-adhesion-tuning-of-superhydrophobic-surfaces-between-lotus-and-petal-effect-and-their-influence-on-icing-and-de-icing-properties
#12
Md Julker Nine, Tran Thanh Tung, Faisal Khalid Alotaibi, Diana N H Tran, Dusan Losic
Adhesion behaviour of superhydrophobic (SH) surfaces is an active research field related to various engineering applications in controlled microdroplet transportation, self-cleaning, de-icing, biochemical separation, tissue engineering, and water harvesting. Herein, we report a facile approach to control droplet adhesion, bouncing and rolling on properties of SH surfaces by tuning their air-gap and roughness-height by altering the concentrations of poly-dimethyl-siloxane (PDMS). The optimal use of PDMS (4 wt% to 16 wt%) in a dual-scale (nano and micro-particles) composite enables to control specific surface area (SSA), pore-volume, and roughness of matrices that results in a well-controlled adhesion between water droplets and SH surfaces...
February 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28192345/towards-advanced-aeration-modelling-from-blower-to-bubbles-to-bulk
#13
Andreia Amaral, Oliver Schraa, Leiv Rieger, Sylvie Gillot, Yannick Fayolle, Giacomo Bellandi, Youri Amerlinck, Séverine T F C Mortier, Riccardo Gori, Ramiro Neves, Ingmar Nopens
Aeration is an essential component of aerobic biological wastewater treatment and is the largest energy consumer at most water resource recovery facilities. Most modelling studies neglect the inherent complexity of the aeration systems used. Typically, the blowers, air piping, and diffusers are not modelled in detail, completely mixed reactors in a series are used to represent plug-flow reactors, and empirical correlations are used to describe the impact of operating conditions on bubble formation and transport, and oxygen transfer from the bubbles to the bulk liquid...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28188054/exposure-to-air-pollutants-during-commuting-in-london-are-there-inequalities-among-different-socio-economic-groups
#14
Ioar Rivas, Prashant Kumar, Alex Hagen-Zanker
People with low income often experience higher exposures to air pollutants. We compared the exposure to particulate matter (PM1, PM2.5 and PM10), Black Carbon (BC) and ultrafine particles (PNCs; 0.02-1μm) for typical commutes by car, bus and underground from 4 London areas with different levels of income deprivation (G1 to G4, from most to least deprived). The highest BC and PM concentrations were found in G1 while the highest PNC in G3. Lowest concentrations for all pollutants were observed in G2. We found no systematic relationship between income deprivation and pollutant concentrations, suggesting that differences between transport modes are a stronger influence...
February 7, 2017: Environment International
https://www.readbyqxmd.com/read/28187135/pathogen-cross-transmission-via-building-sanitary-plumbing-systems-in-a-full-scale-pilot-test-rig
#15
Michael Gormley, Thomas J Aspray, David A Kelly, Cristina Rodriguez-Gil
The WHO Consensus Document on the epidemiology of the SARS epidemic in 2003, included a report on a concentrated outbreak in one Hong Kong housing block which was considered a 'super-spreading event'. The WHO report conjectured that the sanitary plumbing system was one transmission route for the virus. Empty U-traps allowed the aerosolised virus to enter households from the sewerage system. No biological evidence was presented. This research reports evidence that pathogens can be aerosolised and transported on airstreams within sanitary plumbing systems and enter buildings via empty U-traps...
2017: PloS One
https://www.readbyqxmd.com/read/28186804/light-induced-pulling-and-pushing-by-the-synergic-effect-of-optical-force-and-photophoretic-force
#16
Jinsheng Lu, Hangbo Yang, Lina Zhou, Yuanqing Yang, Si Luo, Qiang Li, Min Qiu
Optical force, coming from momentum exchange during light-matter interactions, has been widely utilized to manipulate microscopic objects, though mostly in vacuum or in liquids. By contrast, due to the light-induced thermal effect, photophoretic force provides an alternative and effective way to transport light-absorbing particles in ambient gases. However, in most cases these forces work independently. Here, by employing the synergy of optical force and photophoretic force, we propose and experimentally demonstrate a configuration which can drive a micron-size metallic plate moving back and forth on a tapered fiber with supercontinuum light in ambient air...
January 27, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28186453/effects-of-distance-and-transport-method-on-intervention-and-mortality-in-aneurysmal-subarachnoid-hemorrhage
#17
Jonathan Weyhenmeyer, Cristian F Guandique, Adam Leibold, Stephen Lehnert, Jonathan Parish, Woody Han, Chad Tuchek, Janit Pandya, Thomas Leipzig, Troy Payner, Andrew DeNardo, John Scott, Aaron A Cohen-Gadol
OBJECTIVE Most patients suffering from aneurysmal subarachnoid hemorrhage (aSAH) initially present to a hospital that lacks a neurosurgical unit. These patients require interhospital transfer (IHT) to tertiary facilities capable of multidisciplinary neurosurgical intervention. Yet, little is known about the effects of IHT on the outcomes of patients suffering from aSAH. In this study, the authors examined the effects of IHT and transport method on the timing of treatment, rebleed rates, and overall outcomes of patients who have experienced aSAH...
February 10, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28186402/next-generation-electrochemical-energy-materials-for-intermediate-temperature-molten-oxide-fuel-cells-and-ion-transport-molten-oxide-membranes
#18
Valery V Belousov
High temperature electrochemical devices such as solid oxide fuel cells (SOFCs) and oxygen separators based on ceramic materials are used for efficient energy conversion. These devices generally operate in the temperature range of 800-1000 °C. The high operating temperatures lead to accelerated degradation of the SOFC and oxygen separator materials. To solve this problem, the operating temperatures of these electrochemical devices must be lowered. However, lowering the temperature is accompanied by decreasing the ionic conductivity of fuel cell electrolyte and oxygen separator membrane...
February 10, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28185450/ch3nh3pbi3-xclx-under-different-fabrication-strategies-electronic-structures-and-energy-level-alignment-with-an-organic-hole-transport-material
#19
Rongbin Wang, Chen Wu, Yun Hu, Jitao Li, Pengfei Shen, Qi Wang, Liang-Sheng Liao, Lijia Liu, Steffen Duhm
We report a photoelectron spectroscopy study on the electronic structure of CH3NH3PbI3-xClx thin films fabricated by physical evaporation from CH3NH3I and PbCl2 precursors, including (1) simultaneously evaporation and (2) sequential evaporation. The results are compared with CH3NH3PbI3-xClx made using conventional solution chemistry (i.e. spin-coating). Depending on the fabrication method, CH3NH3PbI3-xClx films show different chemical constituents in the near-surface region, leading to disparities in their energetic levels...
February 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28185178/spatiotemporal-distribution-and-source-apportionment-of-low-molecular-weight-organic-acids-in-wet-precipitation-at-a-coastal-city-china
#20
Wenjiao Du, Zhenyu Hong, Yanting Chen, Junjun Deng, Jinsheng Chen, Lingling Xu, Youwei Hong, Hang Xiao
To investigate the characteristics and sources of low molecular weight (LMW) organic acids in wet precipitation at a coastal city, Xiamen, a total of 313 rainwater samples were collected at seven different functional areas from September 2012 to August 2013. Spatiotemporal characteristics of LMW organic acids as well as pH and electrical conductivity were analyzed. Meanwhile, air mass clusters in different seasons and the positive matrix factorization (PMF) source apportion model were comprehensively used to identify the sources of organic acids...
February 9, 2017: Environmental Science and Pollution Research International
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