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https://www.readbyqxmd.com/read/29144282/substrate-effects-in-high-gain-low-operating-voltage-snse2-photoconductor
#1
Krishna Murali, Sangeeth Kallatt, Kausik Majumdar
High gain photoconductive devices find wide spread applications in low intensity light detection. Ultra-thin layered materials have recently attracted a lot of attention from researchers in this regard. However, in general, a large operating voltage is required to obtain large responsivity in these devices. In addition, the characteristics are often confounded by substrate induced trap effects. Here we report multi-layer SnSe2 based photoconductive devices using two different structures: (1) SiO2 substrate supported interdigitated electrode (IDE), and (2) suspended channel...
November 16, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29141634/the-effects-of-neoliberal-policies-on-access-to-healthcare-for-people-with-disabilities
#2
Dikaios Sakellariou, Elena S Rotarou
Neoliberal reforms lead to deep changes in healthcare systems around the world, on account of their emphasis on free market rather than the right to health. People with disabilities can be particularly disadvantaged by such reforms, due to their increased healthcare needs and lower socioeconomic status. In this article, we analyse the impacts of neoliberal reforms on access to healthcare for disabled people. This article is based on a critical analytical review of the literature and on two case studies, Chile and Greece...
November 15, 2017: International Journal for Equity in Health
https://www.readbyqxmd.com/read/29141425/macromolecules-with-amphiphilic-monomer-units-at-interface-of-two-immiscible-liquids
#3
A A Glagoleva, V V Vasilevskaya
The adsorption of macromolecules with amphiphilic monomer units at the liquid-liquid interface was studied. The amphiphilic structure of monomer units with groups selectively interacting with α and β liquids was described by the A-graft-B dumbbell model. The calculations were performed for the symmetrical interaction of A and B groups with liquids, different selectivity parameters ξ and degree of polymerization N. The simulations indicate a three-step adsorption scenario, including non-adsorbed, weak and strong localization states...
November 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29140080/vapor-assisted-solution-approach-for-high-quality-perovskite-ch3nh3pbbr3-thin-films-for-high-performance-green-light-emitting-diodes-applications
#4
Huifang Ji, Zhifeng Shi, Xuguang Sun, Ying Li, Sen Li, Lingzhi Lei, Di Wu, Tingting Xu, Xinjian Li, Guotong Du
Vapor-assisted solution method was developed to prepare the high-quality organic-inorganic halide perovskite CH3NH3PbBr3 (MAPbBr3) thin films. We detailedly investigated the effect of evaporation time and temperature of MABr powder on the microstructure, crystallinity and optical characterizations of MAPbBr3 thin films, and a controllable morphology evolution with varying surface coverage was observed. Temperature-dependent and time-resolved photoluminescence (PL) measurements were carried out to investigate the optical transition mechanisms and carrier recombination dynamics of MAPbBr3 thin films...
November 15, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29134577/perspective-taking-and-theory-of-mind-in-hide-and-seek
#5
Chris N H Street, Walter F Bischof, Alan Kingstone
Does theory of mind play a significant role in where people choose to hide an item or where they search for an item that has been hidden? Adapting Anderson's "Hide-Find Paradigm" Anderson et al. (Action, Perception and Performance, 76, 907-913, 2014) participants viewed homogenous or popout visual arrays on a touchscreen table. Their task was to indicate where in the array they would hide an item, or to search for an item that had been hidden, by either a friend or a foe. Critically, participants believed that their sitting location at the touchtable was the same as-or opposite to-their partner's location...
November 13, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29131432/water-lubricated-intercalation-in-v2-o5-%C3%A2-nh2-o-for-high-capacity-and-high-rate-aqueous-rechargeable-zinc-batteries
#6
Mengyu Yan, Pan He, Ying Chen, Shanyu Wang, Qiulong Wei, Kangning Zhao, Xu Xu, Qinyou An, Yi Shuang, Yuyan Shao, Karl T Mueller, Liqiang Mai, Jun Liu, Jihui Yang
Low-cost, environment-friendly aqueous Zn batteries have great potential for large-scale energy storage, but the intercalation of zinc ions in the cathode materials is challenging and complex. Herein, the critical role of structural H2 O on Zn(2+) intercalation into bilayer V2 O5 ·nH2 O is demonstrated. The results suggest that the H2 O-solvated Zn(2+) possesses largely reduced effective charge and thus reduced electrostatic interactions with the V2 O5 framework, effectively promoting its diffusion. Benefited from the "lubricating" effect, the aqueous Zn battery shows a specific energy of ≈144 Wh kg(-1) at 0...
November 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/29130573/planned-angiographic-control-versus-clinical-follow-up-for-patients-with-unprotected-left-main-stem-stenosis-treated-with-second-generation-drug-eluting-stents-a-propensity-score-with-matching-analysis-from-the-fails-failure-in-left-main-with-second-generation
#7
Fabrizio D'Ascenzo, Mario Iannaccone, Marco Pavani, Hyroishi Kawamoto, Javier Escaned, Ferdinando Varbella, Giacomo Boccuzzi, David Hiddick-Smith, Antonio Colombo, Fiorenzo Gaita
BACKGROUND: The value of angiographic follow-up in unprotected left main (ULM) stenting remains undefined. METHODS: The FAILS-2 registry included consecutive patients presenting with a critical lesion of an ULM treated with second generation drug eluting stents in 6 centers from June 2007 to January 2015. Patients were stratified into two groups: those discharged with planned angiographic follow-up and those with clinical follow-up. MACE (Major Adverse Clinical Events, a composite end point of death, myocardial infarction, TLR, and ST) was the primary end point, while each component was a secondary endpoint Sensitivity analysis was performed for patients treated with a provisional or a two-stent strategy...
November 11, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/29129936/infrared-energy-harvesting-in-millimeter-scale-gaas-photovoltaics
#8
Eunseong Moon, David Blaauw, Jamie D Phillips
The design and characterization of mm-scale GaAs photovoltaic cells are presented and demonstrate highly efficient energy harvesting in the near infrared. Device performance is improved dramatically by optimization of the device structure for the near-infrared spectral region and improving surface and sidewall passivation with ammonium sulfide treatment and subsequent silicon nitride deposition. The power conversion efficiency of a 6.4 mm(2) cell under 660 nW/mm(2) NIR illumination at 850 nm is greater than 30 %, which is higher than commercial crystalline silicon solar cells under similar illumination conditions...
November 2017: IEEE Transactions on Electron Devices
https://www.readbyqxmd.com/read/29128787/enhancing-handwashing-frequency-and-technique-of-primary-caregivers-in-harare-zimbabwe-a-cluster-randomized-controlled-trial-using-behavioral-and-microbial-outcomes
#9
Max N D Friedrich, Andreas Kappler, Hans-Joachim Mosler
RATIONALE: Consistent hand hygiene prevents diarrheal and respiratory diseases, but it is often not practiced. The disease burden is highest in low-income settings, which need effective interventions to promote domestic handwashing. To date, most handwashing campaigns have focused on promoting frequent handwashing at key times, whereas specifically promoting handwashing techniques proven to be effective in removing microbes has been confined to healthcare settings. METHODS: We used a cluster-randomized, factorial, controlled trial to test the effects of two handwashing interventions on the behavior of primary caregivers in Harare, Zimbabwe...
November 4, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/29127760/preoperative-breast-mri-examination-for-all-patients-with-histologically-proven-breast-cancer-a-concept-for-a-prospective-multicenter-trial
#10
Christina Kaiser, Christina Kehrer, Mignon-Denise Keyver-Paik, Thomas Hecking, Tiyasha Hosne Ayub, Claudia Leutner, Hans Schild, Walther Kuhn
Background A published retrospective data of our study group demonstrated that premenopausal women, patients with lobular invasive breast cancer or patients with high breast density [American College of Radiology (ACR) classification 3+4] significantly benefit from magnetic resonance imaging (MRI) leading to additional detection of malignant foci of 20.2% in the index and 2.5% in the contralateral breast, which would otherwise not be detected by routine imaging. Critics of preoperative MRI focus on higher false-positive rates leading to unnecessary surgical procedures and mastectomies...
November 11, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29127719/critical-evaluation-of-the-american-joint-commission-on-cancer-ajcc-8th-edition-staging-system-for-patients-with-hepatocellular-carcinoma-hcc-a-surveillance-epidemiology-end-results-seer-analysis
#11
Sivesh K Kamarajah, Timothy L Frankel, Christopher Sonnenday, Clifford S Cho, Hari Nathan
BACKGROUND: Recently, the American Joint Committee on Cancer (AJCC) released its 8th edition changes to the staging system for hepatocellular cancer (HCC). We sought to validate the 8th edition staging system and compare the performance to the 7th edition using a population-based data set. METHODS: Using the Surveillance, Epidemiology and End Results (SEER) database (1998-2013), patients undergoing resection or transplant for non-metastatic HCC were identified. Overall survival was estimated using the Kaplan-Meier method and compared using log-rank tests...
November 11, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/29121108/spatio-temporal-dynamics-of-multimodal-eeg-fnirs-signals-in-the-loss-and-recovery-of-consciousness-under-sedation-using-midazolam-and-propofol
#12
Seul-Ki Yeom, Dong-Ok Won, Seong In Chi, Kwang-Suk Seo, Hyun Jeong Kim, Klaus-Robert Müller, Seong-Whan Lee
On sedation motivated by the clinical needs for safety and reliability, recent studies have attempted to identify brain-specific signatures for tracking patient transition into and out of consciousness, but the differences in neurophysiological effects between 1) the sedative types and 2) the presence/absence of surgical stimulations still remain unclear. Here we used multimodal electroencephalography-functional near-infrared spectroscopy (EEG-fNIRS) measurements to observe electrical and hemodynamic responses during sedation simultaneously...
2017: PloS One
https://www.readbyqxmd.com/read/29119262/role-of-cardiac-pet-in-clinical-practice
#13
REVIEW
Brian M Salata, Parmanand Singh
Early identification of atherosclerosis and at-risk lesions plays a critical role in reducing the burden of cardiovascular disease. While invasive coronary angiography serves as the gold standard for diagnosing coronary artery disease, non-invasive imaging techniques provide visualization of both anatomical and functional atherosclerotic processes prior to clinical presentation. The development of cardiac positron emission tomography (PET) has greatly enhanced our capability to diagnose and treat patients with early stages of atherosclerosis...
November 9, 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/29117071/deception-improves-tt-performance-in-well-trained-cyclists-without-augmented-fatigue
#14
Paul Ansdell, Kevin Thomas, Glyn Howatson, Markus Amann, Stuart Goodall
PURPOSE: To investigate the effects of feedback, in the form of a virtual avatar paced at 100 and 102% of baseline performance, on neuromuscular fatigue following a 4 km cycling time trial (TT). We hypothesised that improved cycling performance would occur due to participants exceeding a previously established critical threshold, and experiencing greater neuromuscular fatigue. METHODS: Following familiarisation, ten well-trained cyclists performed a baseline 4 km TT without feedback (BASE), followed by two, 4 km TT where they raced against an avatar (set at 100% [accurate - ACC] and 102% [deception - DEC] of baseline power output), in a randomised and counterbalanced order...
November 7, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29115280/real-time-cerebellar-neuroprosthetic-system-based-on-a-spiking-neural-network-model-of-motor-learning
#15
Tao Xu, Na Xiao, Xiaolong Zhai, Pak Kwan Chan, Chung Tin
Damage to the brain, as a result of various medical conditions, impacts everyday life of patients and there is still no complete cure to neurological disorders. Neuroprostheses that can functionally replace the damaged neural circuit have recently emerged as a possible solution to these problems. Here we describe the development of a real-time cerebellar neuroprosthetic system to substitute neural function in cerebellar circuitry for learning delay eyeblink conditioning (DEC). Approach: The system was empowered by a biologically realistic spiking neural network (SNN) model of the cerebellar neural circuit, which considers the neuronal population and anatomical connectivity of the network...
November 8, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29115165/a-fuzzy-micmac-analysis-for-improving-supply-chain-performance-of-basic-vaccines-in-developing-countries
#16
Dheeraj Chandra, Dinesh Kumar
INTRODUCTION: In recent years, demand to improve child immunization coverage globally, and the development of the latest vaccines and technology has made the vaccine market very complex. The rise in such complexities often gives birth to numerous issues in the vaccine supply chain, which are the primary cause of its poor performance. Figuring out the cause of the performance problem can help you decide how to address it. The goal of the present study is to identify and analyze important issues in the supply chain of basic vaccines required for child immunization in the developing countries...
November 8, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29112625/ischemic-preconditioning-improves-time-trial-performance-at-moderate-altitude
#17
Pénélope Paradis-Deschênes, Denis R Joanisse, François Billaut
PURPOSE: Endurance athletes often compete and train at altitude where exercise capacity is reduced. Investigating acclimation strategies is therefore critical. Ischemic preconditioning (IPC) can improve endurance performance at sea level through improved O2 delivery and utilization, which could also prove beneficial at altitude. However, data are scarce and there is no study at altitudes commonly visited by endurance athletes. METHODS: In a randomized, crossover study, we investigated performance and physiological responses in thirteen male endurance cyclists during four 5-km cycling time trials (TT), preceded by either IPC (3x5-minutes ischemia/5-minutes reperfusion cycles at 220 mmHg) or SHAM (20 mmHg) administered to both thighs, at simulated low (FIO2 0...
November 6, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29108901/keto-adaptation-enhances-exercise-performance-and-body-composition-responses-to-training-in-endurance-athletes
#18
Fionn T McSwiney, Bruce Wardrop, Parker N Hyde, Richard A Lafountain, Jeff S Volek, Lorna Doyle
BACKGROUND: Low-carbohydrate diets have recently grown in popularity among endurance athletes, yet little is known about the long-term (>4 wk) performance implications of consuming a low-carbohydrate high fat ketogenic diet (LCKD) in well-trained athletes. METHODS: Twenty male endurance-trained athletes (age 33 ± 11y, body mass 80 ± 11kg; BMI 24.7 ± 3.1 kg/m(2)) who habitually consumed a carbohydrate-based diet, self-selected into a high-carbohydrate (HC) group (n = 11, %carbohydrate:protein:fat = 65:14:20), or a LCKD group (n = 9, 6:17:77)...
November 3, 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/29108573/developments-of-microfluidic-paper-based-analytical-devices-%C3%AE-pads-for-water-analysis-a-review
#19
M Inês G S Almeida, B Manori Jayawardane, Spas D Kolev, Ian D McKelvie
Water pollution is a serious environmental problem affecting millions of people, and the demand for frequent water quality monitoring is increasing. The need for analytical platforms that combine high sensitivity, selectivity and accuracy with low cost, portability and user friendliness remains a challenge. Microfluidic paper-based analytical devices (μPADs) are recognised as a powerful analytical platform that can satisfy these requirements. The aim of this review is to provide a detailed overview of the μPADs that have been developed for the determination of important water quality parameters, such as nutrients, metals and organic contaminants, in a range of waters...
January 15, 2018: Talanta
https://www.readbyqxmd.com/read/29105851/perovskite-solar-cells-with-zno-electron-transporting-materials
#20
REVIEW
Peng Zhang, Jiang Wu, Ting Zhang, Yafei Wang, Detao Liu, Hao Chen, Long Ji, Chunhua Liu, Waseem Ahmad, Zhi David Chen, Shibin Li
Perovskite solar cells (PSCs) have developed rapidly over the past few years, and the power conversion efficiency of PSCs has exceeded 20%. Such high performance can be attributed to the unique properties of perovskite materials, such as high absorption over the visible range and long diffusion length. Due to the different diffusion lengths of holes and electrons, electron transporting materials (ETMs) used in PSCs play a critical role in PSCs performance. As an alternative to TiO2 ETM, ZnO materials have similar physical properties to TiO2 but with much higher electron mobility...
November 6, 2017: Advanced Materials
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