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D Veysset, U Gutiérrez-Hernández, L Dresselhaus-Cooper, F De Colle, S Kooi, K A Nelson, P A Quinto-Su, T Pezeril
In this study a single laser pulse spatially shaped into a ring is focused into a thin water layer, creating an annular cavitation bubble and cylindrical shock waves: an outer shock that diverges away from the excitation laser ring and an inner shock that focuses towards the center. A few nanoseconds after the converging shock reaches the focus and diverges away from the center, a single bubble nucleates at the center. The inner diverging shock then reaches the surface of the annular laser-induced bubble and reflects at the boundary, initiating nucleation of a tertiary bubble cloud...
May 2018: Physical Review. E
Zirong Lei, Luqiong Chen, Kan Hu, Shengchun Yang, Xiaodong Wen
Cold vapor generation (CVG) of cadmium was firstly accomplished in non-aqueous media by using solid reductant of potassium borohydride (KBH4 ) as a derivation reagent. The mixture of surfactant Triton X-114 micelle and octanol was innovatively used as the non-aqueous media for the CVG and atomic fluorescence spectrometry (AFS) was used for the elemental determination. The analyte ions were firstly extracted into the non-aqueous media from the bulk aqueous phase of analyte/sample solution via a novelly established ultrasound-assisted rapidly synergistic cloud point extraction (UARS-CPE) process and then directly mixed with the solid redcutant KBH4 to generate volatile elemental state cadmium in a specially designed reactor, which was then rapidly transported to a commercial atomic fluorescence spectrometer for detection...
June 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Raquel Valdes Angues, Austen Suits, Valerie S Palmer, Caesar Okot, Robert A Okot, Concy Atonywalo, Suzanne K Gazda, David L Kitara, Moka Lantum, Spencer S Peter
BACKGROUND: Disease surveillance in rural regions of many countries is poor, such that prolonged delays (months) may intervene between appearance of disease and its recognition by public health authorities. For infectious disorders, delayed recognition and intervention enables uncontrolled disease spread. We tested the feasibility in northern Uganda of developing real-time, village-based health surveillance of an epidemic of Nodding syndrome (NS) using software-programmed smartphones operated by minimally trained lay mHealth reporters...
June 15, 2018: PLoS Neglected Tropical Diseases
Tomohiro Harano, Nobuyuki Kutsukake
Extremely developed or specialised traits such as the elongated upper canines of extinct sabre-toothed cats are often not analogous to those of any extant species, which limits our understanding of their evolutionary cause. However, an extant species may have undergone directional selection for a similar extreme phenotype. Among living felids, the clouded leopard, Neofelis nebulosa, has exceptionally long upper canines for its body size. We hypothesised that directional selection generated the elongated upper canines of clouded leopards in a manner similar to the process in extinct sabre-toothed cats...
June 14, 2018: Journal of Evolutionary Biology
Yuhang Jiang, Po-Wei Lo, Daniel May, Guohong Li, Guang-Yu Guo, Frithjof B Anders, Takashi Taniguchi, Kenji Watanabe, Jinhai Mao, Eva Y Andrei
In normal metals the magnetic moment of impurity-spins disappears below a characteristic Kondo temperature which marks the formation of a cloud of conduction-band electrons that screen the local-moment. In contrast, moments embedded in insulators remain unscreened at all temperatures. What then is the fate of magnetic-moments in intermediate, pseudogap systems, such as graphene? Theory predicts that coupling to the conduction-band electrons will drive a quantum phase transition between a local-moment phase and a Kondo-screened phase...
June 14, 2018: Nature Communications
Jon Cohen
No abstract text is available yet for this article.
June 15, 2018: Science
J Lelieveld, E Bourtsoukidis, C Brühl, H Fischer, H Fuchs, H Harder, A Hofzumahaus, F Holland, D Marno, M Neumaier, A Pozzer, H Schlager, J Williams, A Zahn, H Ziereis
Air pollution is growing fastest in monsoon-impacted South Asia. During the dry, winter monsoon the fumes disperse toward the Indian Ocean, creating a vast pollution haze, but their fate during the wet, summer monsoon has been unclear. We performed atmospheric chemistry measurements by aircraft in the "Oxidation Mechanism Observations" campaign, sampling the summer monsoon outflow in the upper troposphere between the Mediterranean and the Indian Ocean. The measurements, supported by model calculations, show that the monsoon sustains a remarkably efficient cleansing mechanism in which contaminants are rapidly oxidized and deposited to Earth's surface...
June 14, 2018: Science
Zheng Wang, Xiaowei Wang, Ying Xue, Rong Zhao, Rencai Luo, Dong Chen
OBJECTIVE: To developed a method for rapid visual and colorimetric detection of trace high toxicity element mercury( Hg~(2+)) in natural mineral water via coupling cloud-point extraction with gold nanoparticle probe. METHODS: The concentration of Hg~(2+)was quantified via the color degree of the Triton X-114 phase. The functionalized gold nanoparticle probe was synthesized and purified. 200 μL gold nanoparticle probe was added into 10 mL water sample( pH 7. 5), coupled with 400 μL, 5 % Triton X-114 solution...
July 2017: Wei Sheng Yan Jiu, Journal of Hygiene Research
Yashovardhan Agarwal
BACKGROUND: The World Health Organization and the World Bank's "World Report on Disability" reported that over 1 billion people have various kinds of disability worldwide while Indian Census 2011 reported about 26 million in India. The United Nations Convention states, "The Rights of Persons with Disabilities (PwD) include accessibility to Information, Transportation, Environment, Communication Technology and Services". OBJECTIVE: This article takes forward the reason of making the "EasenAccess" (EnA) Android-based app to empower PwD with wheelchair-accessibility information, communication sentences and sending SOS signals with location...
June 14, 2018: Disability and Rehabilitation. Assistive Technology
Lin Liu, Jianping Guo, Yucong Miao, Lin Liu, Jian Li, Dandan Chen, Jing He, Chunguang Cui
Wuhan, a megacity in central China, suffers from frequent aerosol pollution and is accompanied by meteorological factors at both synoptic and local scales. Partly due to the lack of appropriate observations of planetary boundary layer (PBL), the associations between synoptic conditions, PBL, and pollution there are not yet fully understood. Thus, systematic analyses were conducted using the fine-resolution soundings, surface meteorological measurements, and aerosol observations in Wuhan during summer for the period 2013-2016, in combination with T-mode principal component analysis and simulations of backward trajectory...
June 11, 2018: Environmental Pollution
Bernhard Geissler, Gerald Steiner, Michael C Mew
Big Data, blockchains, and cloud computing have become ubiquitous in today's mass media and are universally known terms used in everyday speech. If we look behind these often misused buzzwords, we find at least one common element, namely data. Although we hardly use these terms in the "classic discipline" of mineral economics, we find various similarities. The case of phosphate data bears numerous challenges in multiple forms such as uncertainties, fuzziness, or misunderstandings. Often simulation models are used to support decision-making processes...
June 11, 2018: Science of the Total Environment
Vivek Navale, Philip E Bourne
Biomedical research has become a digital data-intensive endeavor, relying on secure and scalable computing, storage, and network infrastructure, which has traditionally been purchased, supported, and maintained locally. For certain types of biomedical applications, cloud computing has emerged as an alternative to locally maintained traditional computing approaches. Cloud computing offers users pay-as-you-go access to services such as hardware infrastructure, platforms, and software for solving common biomedical computational problems...
June 2018: PLoS Computational Biology
Francielle Pelegrin Garcia, Marlène Rippe, Mychelle V P Companhoni, Talitha Fernandes Stefanello, Benoit Louage, Simon Van Herck, Lucie Sancey, Jean-Luc Coll, Bruno G De Geest, Celso Vataru Nakamura, Rachel Auzély-Velty
The development of biopolymer-based nanogels has gained particular interest to achieve successful delivery of therapeutics for the treatment of various diseases, such as cancer, infection and diabetes. Herein, we report a new and simple methodology for the covalent stabilization of self-assembled gel nanoparticles based on hyaluronic acid (HA) modified with a thermoresponsive ketone-functional copolymer. This relies on the selective formation of hydrazone crosslinks with bishydrazides within the globular domains of the copolymer chains formed above the cloud point temperature...
June 14, 2018: Biomaterials Science
Birol Cabukusta, Jacques Neefjes
Lysosomes are highly dynamic organelles that can move rapidly throughout the cell. They distribute in a rather immobile pool located around the microtubule-organizing center in a "cloud", and a highly dynamic pool in the cell periphery. Their spatiotemporal characteristics allow them to carry out multiple biological functions, such as cargo degradation, antigen presentation and plasma membrane repair. Therefore, it is not surprising that lysosomal dysfunction underlies various diseases, including cancer, neurodegenerative and autoimmune diseases...
June 14, 2018: Traffic
Scott N Williamson, Faron S Anslow, Garry K C Clarke, John A Gamon, Alexander H Jarosch, David S Hik
Decreasing spring snow cover may amplify Arctic warming through the snow albedo feedback. To examine the impact of snowmelt on increasing temperature we used a 5,000 m elevation gradient in Yukon, Canada, extending from valley-bottom conifer forests, through middle elevation tundra, to high elevation icefields, to compare validated downscaled reanalysis air temperature patterns across elevational bands characterized by different patterns of spring snowmelt. From 2000 to 2014 we observed surface warming of 0...
June 13, 2018: Scientific Reports
Ismail M Khater, Fanrui Meng, Timothy H Wong, Ivan Robert Nabi, Ghassan Hamarneh
Quantitative approaches to analyze the large data sets generated by single molecule localization super-resolution microscopy (SMLM) are limited. We developed a computational pipeline and applied it to analyzing 3D point clouds of SMLM localizations (event lists) of the caveolar coat protein, caveolin-1 (Cav1), in prostate cancer cells differentially expressing CAVIN1 (also known as PTRF), that is also required for caveolae formation. High degree (strongly-interacting) points were removed by an iterative blink merging algorithm and Cav1 network properties were compared with randomly generated networks to retain a sub-network of geometric structures (or blobs)...
June 13, 2018: Scientific Reports
Shenghan Zhou, Silin Qian, Wenbing Chang, Yiyong Xiao, Yang Cheng
Timely and accurate state detection and fault diagnosis of rolling element bearings are very critical to ensuring the reliability of rotating machinery. This paper proposes a novel method of rolling bearing fault diagnosis based on a combination of ensemble empirical mode decomposition (EEMD), weighted permutation entropy (WPE) and an improved support vector machine (SVM) ensemble classifier. A hybrid voting (HV) strategy that combines SVM-based classifiers and cloud similarity measurement (CSM) was employed to improve the classification accuracy...
June 14, 2018: Sensors
E J Yates, L C Yates, H Harvey
AIM: To develop a machine learning-based model for the binary classification of chest radiography abnormalities, to serve as a retrospective tool in guiding clinician reporting prioritisation. MATERIALS AND METHODS: The open-source machine learning library, Tensorflow, was used to retrain a final layer of the deep convolutional neural network, Inception, to perform binary normality classification on two, anonymised, public image datasets. Re-training was performed on 47,644 images using commodity hardware, with validation testing on 5,505 previously unseen radiographs...
June 10, 2018: Clinical Radiology
Kenan Niu, Jasper Homminga, Victor I Sluiter, André Sprengers, Nico Verdonschot
PURPOSE: A fast and accurate intraoperative registration method is important for Computer-Aided Orthopedic Surgery (CAOS). A-mode ultrasound (US) is able to acquire bone surface data in a non-invasive manner. To utilize A-mode US in CAOS, a suitable registration algorithm is necessary with a small number of registration points and the presence of measurement errors. Therefore, we investigated the effects of (1) the number of registration points and (2) the Ultrasound Point Localization Error (UPLE) on the overall registration accuracy...
2018: PloS One
Liya Wang, Zhenyuan Lu, Peter Van Buren, Doreen Ware
Motivation: The rapid accumulation of both sequence and phenotype data generated by high-throughput methods has increased the need to store and analyze data on distributed storage and computing systems. Efficient data management across these heterogeneous systems requires a workflow management system to simplify the task of analysis through automation and make large-scale bioinformatics analyses accessible and reproducible. Results: We developed SciApps, a web-based platform for reproducible bioinformatics workflows...
June 12, 2018: Bioinformatics
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