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https://www.readbyqxmd.com/read/28641984/bi-objective-approach-for-placing-ground-and-air-ambulance-base-and-helipad-locations-in-order-to-optimize-ems-response
#1
Milad Shahriari, Ali Bozorgi-Amiri, Shayan Tavakoli, Abolghasem Yousefi-Babadi
Shortening the travel time of patient transfer has clinical implications for many conditions such as cardiac arrest, trauma, stroke and STEMI. As resources are often limited precise calculations are needed. In this paper we consider the location problem for both ground and aerial emergency medical services. Given the uncertainty of when patients are in need of prompt medical attention we consider these demand points to be uncertain. We consider various ways in which ground and helicopter ambulances can work together to make the whole process go faster...
June 15, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28631623/morphological-self-stabilization-of-locomotion-gaits-illustration-on-a-few-examples-from-bio-inspired-locomotion
#2
Christine Chevallereau, Frédéric Boyer, Mathieu Porez, Johan Mauny, Yannick Aoustin
To a large extent, robotics locomotion can be viewed as cyclic motions, named gaits. Due to the high complexity of the locomotion dynamics, to find the control laws that ensure an expected gait and its stability with respect to external perturbations, is a challenging issue for feedback control. To address this issue, a promising way is to take inspiration from animals that intensively exploit the interactions of the passive degrees of freedom of their body with their physical surroundings, to outsource the high-level exteroceptive feedback control to low-level proprioceptive ones...
June 20, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28630671/bsla-stabilized-emulsion-droplets-with-designed-microstructure
#3
Keith M Bromley, Cait E MacPhee
Emulsions are a central component of many modern formulations in food, pharmaceuticals, agrichemicals and personal care products. The droplets in these formulations are limited to being spherical as a consequence of the interfacial tension between the dispersed phase and continuous phase. The ability to control emulsion droplet morphology and stabilize non-spherical droplets would enable the modification of emulsion properties such as stability, substrate binding, delivery rate and rheology. One way of controlling droplet microstructure is to apply an elastic film around the droplet to prevent it from relaxing into a sphere...
August 6, 2017: Interface Focus
https://www.readbyqxmd.com/read/28624746/textual-properties-and-catalytic-performances-of-halloysite-hybrid-ceo2-zro2-nanoparticles
#4
Jing Ouyang, Zai Zhao, Yi Zhang, Huaming Yang
Halloysite (Hal) hybridized ceria-zirconia solid solution material (CZ-Hal) for three way catalysis was synthesized through co-precipitation method. X-ray diffraction (XRD), N2 adsorption-desorption isotherms, transmission electronic microscopy (TEM), scanning electronic microscopy (SEM), X-ray energy dispersion spectrum (EDS), and temperature-programmed H2 reduction (H2-TPR) were used to characterize the crystalline, textural, morphological, and reducibility of the products. The three way catalytic performances of the supported products was tested in stoichiometric air/fuel condition...
June 9, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28621134/surfactant-and-binder-free-hierarchical-platinum-nanoarrays-directly-grown-onto-a-carbon-felt-electrode-for-efficient-electrocatalysis
#5
Widya Ernayati Kosimaningrum, Thi-Xuan-Huong Le, Yaovi Holade, Mikhael Bechelany, Sophie Tingry, Buchari Buchari, Indra Noviandri, Christophe Innocent, Marc Cretin
The future of fuel cells that convert the chemical energy to electricity relies mostly on the efficiency of oxygen reduction reaction (ORR) due to its sluggish kinetics. By effectively bypassing the use of organic surfactants, post-synthesis steps for the immobilization onto electrodes, the catalytic inks preparation using binders, and the common problem of nanoparticles detachment from supports involved in traditional methodologies, we demonstrate a versatile electrodeposition method for growing anisotropic microstructures directly onto a three-dimensional (3D) carbon felt electrode, using platinum nanoparticles as elementary building blocks...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28618617/extended-lattice-boltzmann-scheme-for-droplet-combustion
#6
Mostafa Ashna, Mohammad Hassan Rahimian, Abbas Fakhari
The available lattice Boltzmann (LB) models for combustion or phase change are focused on either single-phase flow combustion or two-phase flow with evaporation assuming a constant density for both liquid and gas phases. To pave the way towards simulation of spray combustion, we propose a two-phase LB method for modeling combustion of liquid fuel droplets. We develop an LB scheme to model phase change and combustion by taking into account the density variation in the gas phase and accounting for the chemical reaction based on the Cahn-Hilliard free-energy approach...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28615650/experimental-design-approach-for-deposition-optimization-of-rf-sputtered-chalcogenide-thin-films-devoted-to-environmental-optical-sensors
#7
E Baudet, M Sergent, P Němec, C Cardinaud, E Rinnert, K Michel, L Jouany, B Bureau, V Nazabal
The development of the optical bio-chemical sensing technology is an extremely important scientific and technological issue for diagnosis and monitoring of diseases, control of industrial processes, environmental detection of air and water pollutants. Owing to their distinctive features, chalcogenide amorphous thin films represent a keystone in the manufacture of middle infrared integrated optical devices for a sensitive detection of biological or environmental variations. Since the chalcogenide thin films characteristics, i...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28615170/air-pollution-in-the-uk-better-ways-to-solve-the-problem
#8
Robin Russell-Jones
No abstract text is available yet for this article.
June 14, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28614172/the-relationship-between-the-number-of-intersections-of-staple-lines-and-anastomotic-leakage-after-the-use-of-a-double-stapling-technique-in-laparoscopic-colorectal-surgery
#9
SeungHun Lee, ByungKwon Ahn, SeungHyun Lee
PURPOSE: Laparoscopic intracorporeal colorectal anastomosis with double stapling technique is difficult because of unsuitable cutting angle in narrow pelvic cavity. For reasons of tilted and long linear staple line of rectal stump, circular anastomotic plane can make multiple intersections. The present study was designed to assess whether multiple intersections after double stapling technique is the risk factor of anastomotic complication in laparoscopic colorectal surgery. MATERIALS AND METHODS: In total, 128 consecutive left colon and rectal cancer patients who underwent laparoscopic rectal resection with double stapling technique were enrolled in this study...
June 13, 2017: Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
https://www.readbyqxmd.com/read/28613327/vegetable-oil-hybrid-films-cross-linked-at-the-air-water-interface-formation-kinetics-and-physical-characterization
#10
Antigoni Theodoratou, Laurent Bonnet, Philippe Dieudonné, Gladys Massiera, Pascal Etienne, Jean-Jacques Robin, Vincent Lapinte, Joël Chopineau, Julian Oberdisse, Anne Aubert-Pouëssel
Vegetable oil based hybrid films were developed thanks to a novel solvent- and heating-free method at the air-water interface using silylated castor oil cross-linked via a sol-gel reaction. To understand the mechanism of the hybrid film formation, the reaction kinetics was studied in detail by using complementary techniques: rheology, thermogravimetric analysis, and infrared spectroscopy. The mechanical properties of the final films were investigated using nano-indentation, whereas their structure was studied using a combination of wide-angle X-ray scattering, electron diffraction, and atomic force microscopy...
June 14, 2017: Soft Matter
https://www.readbyqxmd.com/read/28612254/effect-of-urban-design-on-microclimate-and-thermal-comfort-outdoors-in-warm-humid-dar-es-salaam-tanzania
#11
Moohammed Wasim Yahia, Erik Johansson, Sofia Thorsson, Fredrik Lindberg, Maria Isabel Rasmussen
Due to the complexity of built environment, urban design patterns considerably affect the microclimate and outdoor thermal comfort in a given urban morphology. Variables such as building heights and orientations, spaces between buildings, plot coverage alter solar access, wind speed and direction at street level. To improve microclimate and comfort conditions urban design elements including vegetation and shading devices can be used. In warm-humid Dar es Salaam, the climate consideration in urban design has received little attention although the urban planning authorities try to develop the quality of planning and design...
June 14, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28591181/combined-use-of-tri-axial-accelerometers-and-gps-reveals-the-flexible-foraging-strategy-of-a-bird-in-relation-to-weather-conditions
#12
Jesús Hernández-Pliego, Carlos Rodríguez, Giacomo Dell'Omo, Javier Bustamante
Tri-axial accelerometry has proved to be a useful technique to study animal behavior with little direct observation, and also an effective way to measure energy expenditure, allowing a refreshing revisit to optimal foraging theory. This theory predicts that individuals should gain the most energy for the lowest cost in terms of time and energy when foraging, in order to maximize their fitness. However, during a foraging trip, central-place foragers could face different trade-offs during the commuting and searching parts of the trip, influencing behavioral decisions...
2017: PloS One
https://www.readbyqxmd.com/read/28590125/significant-increase-of-aromatics-derived-secondary-organic-aerosol-during-fall-to-winter-in-china
#13
Xiang Ding, Yu-Qing Zhang, Quan-Fu He, Qing-Qing Yu, Jun-Qi Wang, Ru-Qin Shen, Wei Song, Yue-Si Wang, Xin-Ming Wang
Human activities release large amounts of anthropogenic pollutants into the air, and thereby produce substantial secondary organic aerosol (SOA). Aromatic hydrocarbons (AHs) that mainly emitted from coal combustion, transportation, solvent use and biofuel/biomass burning, are a major class of anthropogenic SOA precursors. At present, there are few field studies focusing on AH-derived SOA (SOAA) on a continental scale, especially in polluted regions of the world. In this study, a one-year concurrent observation of the SOAA tracer, 2,3-dihydroxy-4-oxopentanoic acid (C5H8O5, DHOPA) was carried out at 12 sites across six regions of China for the first time...
June 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28589203/tuning-the-sound-speed-in-macroporous-polymers-with-a-hard-or-soft-matrix
#14
Artem Kovalenko, Martin Fauquignon, Thomas Brunet, Olivier Mondain-Monval
In this paper, we investigate the factors affecting the sound speed in air-filled macroporous polymer materials at ultrasound frequencies. Due to the presence of large proportion of gas, these porous materials present high compressibility and, as a consequence, low sound speed which may fall down to values as low as 40 m s(-1). Using an emulsion-templating method, we synthesize macroporous samples with similar porous structures but with three different matrices, i.e. a hard poly(styrene-divinylbenzene (DVB)) matrix, a soft epoxy-modified polydimethylsiloxane (PDMS) matrix and a very soft polyaddition PDMS matrix...
June 7, 2017: Soft Matter
https://www.readbyqxmd.com/read/28581559/the-social-cost-of-methane-theory-and-applications
#15
D T Shindell, J S Fuglestvedt, W J Collins
Methane emissions contribute to global warming, damage public health and reduce the yield of agricultural and forest ecosystems. Quantifying these damages to the planetary commons by calculating the social cost of methane (SCM) facilitates more comprehensive cost-benefit analyses of methane emissions control measures and is the first step to potentially incorporating them into the marketplace. Use of a broad measure of social welfare is also an attractive alternative or supplement to emission metrics focused on a temperature target in a given year as it incentivizes action to provide benefits over a broader range of impacts and timescales...
June 5, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28571401/a-novel-signal-acquisition-platform-of-human-cardiovascular-information-with-noninvasive-method
#16
Longcong Chen, Shaoxi Cai, Bo Li, Qifeng Jiang, Ming Ke, Yi Zhao, Sijia Chen, Misha Zou
Cardiovascular diseases (CVDs) are considered the major cause of death worldwide, so more researchers pay more and more attention to the development of a non-invasive method to obtain as much cardiovascular information (CVI) as possible for early screening and diagnosing. It is known that considerable brain information could be probed by a variety of stimuli (such as video, light, and sound). Therefore, it is quite possible that much more CVI could be extracted via giving the human body some special interrelated stimulus...
May 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28570048/aerosol-mass-spectrometer-for-simultaneous-detection-of-polyaromatic-hydrocarbons-and-inorganic-components-from-individual-particles
#17
Johannes Passig, Julian Schade, Markus Oster, Matthias Fuchs, Sven Ehlert, Cornelia Jäger, Martin Sklorz, Ralf Zimmermann
Online studies of single airborne particles represent a demanding challenge in aerosol chemistry. New technologies that help to unravel the role of ambient aerosols in earth climate and to assess local and specific health risks from air pollution are highly desired. Of particular relevance are polycyclic aromatic hydrocarbons (PAHs) from combustion processes that are associated with both acute and long-term health effects. Usually, online single particle analyses apply laser desorption/ionization (LDI) in a bipolar mass spectrometer, revealing elemental constituents and limited molecular information by detection of both positive and negative ions...
June 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28558422/reflections-on-a-boom-perceptions-of-energy-development-impacts-in-the-bakken-oil-patch-inform-environmental-science-policy-priorities
#18
Devan Allen McGranahan, Felix N Fernando, Meghan L E Kirkwood
Ecosystems worldwide have been subject to new or intensified energy development facilitated by technologies such as horizontal drilling and hydraulic fracturing, activity that has generated concern for air, water, biotic, and social resources. Application of these technologies in the development of the Bakken oil patch has made it one of the most productive petroleum plays in North America, causing unprecedented landscape industrialization of otherwise rural, agricultural counties in western North Dakota. The region is isolated, and development impacts have not been well-studied...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28553028/role-of-community-in-swachh-bharat-mission-their-knowledge-attitude-and-practices-of-sanitary-latrine-usage-in-rural-areas-tamil-nadu
#19
R Anuradha, Ruma Dutta, J Dinesh Raja, D Lawrence, J Timsi, P Sivaprakasam
BACKGROUND: In most developing countries, open defecation is the 'way of life'. This practice is considered as the most serious health and environmental hazard. Prime Minister of India launched the "Swachh Bharat Mission" to accelerate the efforts for achieving universal sanitation coverage and to put focus on sanitation. OBJECTIVE: To find the knowledge, attitude and practices of sanitary latrines usage in rural area, Tamil Nadu. MATERIALS AND METHODS: This was a cross sectional study conducted among rural population in Kuthambakkam village, Tamil Nadu...
April 2017: Indian Journal of Community Medicine
https://www.readbyqxmd.com/read/28552335/effect-of-air-blowing-duration-on-the-bond-strength-of-current-one-step-adhesives-to-dentin
#20
Jiale Fu, Pipop Saikaew, Shimpei Kawano, Ricardo M Carvalho, Matthias Hannig, Hidehiko Sano, Denis Selimovic
OBJECTIVES: To evaluate the influence of different air-blowing durations on the micro-tensile bond strength (μTBS) of five current one-step adhesive systems to dentin. METHODS: One hundred and five caries-free human molars and five current one-step adhesive systems were used: ABU (All Bond Universal, Bisco, Inc.), CUB (CLEARFIL™ Universal Bond, Kuraray), GPB (G-Premio BOND, GC), OBA (OptiBond All-in-one, Kerr) and SBU (Scotchbond Universal, 3M ESPE). The adhesives were applied to 600 SiC paper-flat dentin surfaces according to each manufacturer's instructions and were air-dried with standard, oil-free air pressure of 0...
May 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
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