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https://www.readbyqxmd.com/read/29036935/laser-powder-cladding-of-ti-6al-4v-%C3%AE-%C3%AE-alloy
#1
Samar Reda Al-Sayed Ali, Abdel Hamid Ahmed Hussein, Adel Abdel Menam Saleh Nofal, Salah Elden Ibrahim Hasseb Elnaby, Haytham Abdelrafea Elgazzar, Hassan Abdel Sabour
Laser cladding process was performed on a commercial Ti-6Al-4V (α + β) titanium alloy by means of tungsten carbide-nickel based alloy powder blend. Nd:YAG laser with a 2.2-KW continuous wave was used with coaxial jet nozzle coupled with a standard powder feeding system. Four-track deposition of a blended powder consisting of 60 wt % tungsten carbide (WC) and 40 wt % NiCrBSi was successfully made on the alloy. The high content of the hard WC particles is intended to enhance the abrasion resistance of the titanium alloy...
October 15, 2017: Materials
https://www.readbyqxmd.com/read/29036895/low-cost-lab-on-chip-for-the-colorimetric-detection-of-nitrate-in-mineral-water-products
#2
Mohammad F Khanfar, Wisam Al-Faqheri, Ala'aldeen Al-Halhouli
The diagnostics of health status and the quality of drinking water are among the most important United Nations sustainable development goals. However, in certain areas, wars and instability have left millions of people setting in refugee camps and dangerous regions where infrastructures are lacking and rapid diagnostics of water quality and medical status are critical. In this work, microfluidic testing chips and photometric setups are developed in cheap and portable way to detect nitrate concentrations in water...
October 14, 2017: Sensors
https://www.readbyqxmd.com/read/29036878/geometric-artifacts-reduction-for-cone-beam-ct-via-l0-norm-minimization-without-dedicated-phantoms
#3
Changcheng Gong, Yufang Cai, Li Zeng
For cone-beam computed tomography (CBCT), transversal shifts of the rotation center exist inevitably, which will result in geometric artifacts in CT images. In this work, we propose a novel geometric calibration method for CBCT, which can also be used in micro-CT. The symmetry property of the sinogram is used for the first calibration, and then L0-norm of the gradient image from the reconstructed image is used as the cost function to be minimized for the second calibration. An iterative search method is adopted to pursue the local minimum of the L0-norm minimization problem...
October 10, 2017: Journal of X-ray Science and Technology
https://www.readbyqxmd.com/read/29036869/the-relationship-between-trait-self-control-consideration-for-future-consequence-and-organizational-citizenship-behavior-among-chinese-employees
#4
Yu-Jie Wang, Kai Dou
BACKGROUND: Organizational citizenship behavior (OCB) is important to the development of an organization. Research into factors that foster OCB and the underlying processes are therefore substantially crucial. OBJECTIVE: The current study aimed to test the association between trait self-control and OCB and the mediating role of consideration for future consequence. METHOD: Four hundred and ninety-four Chinese employees (275 men, 219 women) took part in the study...
October 8, 2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/29036848/concentration-endurance-test-d2-normative-data-for-spanish-speaking-pediatric-population
#5
D Rivera, C Salinas, D Ramos-Usuga, I D Delgado-Mejía, Y Vasallo Key, G P Hernández Agurcia, J Valencia Vásquez, C E García-Guerrero, C García de la Cadena, B V Rabago Barajas, I Romero-García, A I Campos Varillas, M Sánchez-SanSegundo, A Galvao-Carmona, L Lara, E J Granja Gilbert, P Martín-Lobo, J Velázquez-Cardoso, A Caracuel, J C Arango-Lasprilla
OBJECTIVE: To generate normative data for the Concentration Endurance Test (d2) test in Spanish-speaking pediatric populations. METHOD: The sample consisted of 4,373 healthy children from nine countries in Latin America (Chile, Cuba, Ecuador, Guatemala, Honduras, Mexico, Paraguay, Peru, and Puerto Rico) and Spain. Each participant was administered the d2 test as part of a larger neuropsychological battery. The Total number of items processed (TN), Total number of correct responses (CR), Total performance (TP), and Concentration performance (CP) scores were normed using multiple linear regressions and standard deviations of residual values...
October 8, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/29036751/-diagnosis-and-management-of-vestibular-schwannomas-an-interdisciplinary-challenge
#6
Steffen Rosahl, Christopher Bohr, Michael Lell, Klaus Hamm, Heinrich Iro
Vestibular schwannomas expand slowly in the internal auditory canal, in the cerebellopontine angle, inside the cochlear and the labyrinth. Larger tumors can displace and compress the brainstem. With an annual incidence of 1:100 000 vestibular schwannoma represent 6-7% of all intracranial tumors. In the cerebellopontine angle they are by far the most neoplasm with 90% of all lesions located in this region. Magnetic resonance imaging (MRI), audiometry, and vestibular diagnostics are the mainstays of the clinical workup for patients harboring tumors...
April 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29036604/accomplishing-reform-successful-case-studies-drawn-from-the-health-systems-of-60-countries
#7
Jeffrey Braithwaite, Russell Mannion, Yukihiro Matsuyama, Paul Shekelle, Stuart Whittaker, Samir Al-Adawi, Kristiana Ludlow, Wendy James, Hsuen P Ting, Jessica Herkes, Louise A Ellis, Kate Churruca, Wendy Nicklin, Clifford Hughes
Healthcare reform typically involves orchestrating a policy change, mediated through some form of operational, systems, financial, process or practice intervention. The aim is to improve the ways in which care is delivered to patients. In our book 'Health Systems Improvement Across the Globe: Success Stories from 60 Countries', we gathered case-study accomplishments from 60 countries. A unique feature of the collection is the diversity of included countries, from the wealthiest and most politically stable such as Japan, Qatar and Canada, to some of the poorest, most densely populated or politically challenged, including Afghanistan, Guinea and Nigeria...
September 20, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/29036499/vcf-explorer-filtering-and-analysing-whole-genome-vcf-files
#8
Mete Akgün, Hüseyin Demirci
Summary: The decreasing cost in high-throughput technologies led to a number of sequencing projects consisting of thousands of whole genomes. The paradigm shift from exome to whole genome brings a significant increase in the size of output files. Most of the existing tools which are developed to analyse exome files are not adequate for larger VCF files produced by whole genome studies. In this work we present VCF-Explorer, a variant analysis software capable of handling large files. Memory efficiency and avoiding computationally costly pre-processing step enable to carry out the analysis to be performed with ordinary computers...
July 7, 2017: Bioinformatics
https://www.readbyqxmd.com/read/29036177/dietary-patterns-in-internal-migrants-in-a-continental-country-a-population-based-study
#9
Antonio Augusto Ferreira Carioca, Bartira Gorgulho, Juliana Araujo Teixeira, Regina Mara Fisberg, Dirce Maria Marchioni
OBJECTIVE: The objective of this study was to assess the differences and similarities in dietary patterns among migrants and natives. METHODS: A population-based, cross-sectional study was conducted in the city of São Paulo. The study population included internal migrants, defined as individuals born outside São Paulo city who had lived in the city for ten years or longer. The final population (n = 999) was divided into three groups: natives of São Paulo (n = 354), migrants from the Southeast (n = 349) and migrants from the Northeast (n = 296)...
2017: PloS One
https://www.readbyqxmd.com/read/29036167/development-and-validation-of-a-protocol-for-optimizing-the-use-of-paraffin-blocks-in-molecular-epidemiological-studies-the-example-from-the-hpv-ahead-study
#10
Marisa Mena, Belen Lloveras, Sara Tous, Johannes Bogers, Fausto Maffini, Nitin Gangane, Rekha Vijay Kumar, Thara Somanathan, Eric Lucas, Devasena Anantharaman, Tarik Gheit, Xavier Castellsagué, Michael Pawlita, Silvia de Sanjosé, Laia Alemany, Massimo Tommasino
Worldwide use of formalin-fixed paraffin-embedded blocks (FFPE) is extensive in diagnosis and research. Yet, there is a lack of optimized/standardized protocols to process the blocks and verify the quality and presence of the targeted tissue. In the context of an international study on head and neck cancer (HNC)-HPV-AHEAD, a standardized protocol for optimizing the use of FFPEs in molecular epidemiology was developed and validated. First, a protocol for sectioning the FFPE was developed to prevent cross-contamination and distributed between participating centers...
2017: PloS One
https://www.readbyqxmd.com/read/29036153/fixed-pattern-noise-correction-method-based-on-improved-moment-matching-for-a-tdi-cmos-image-sensor
#11
Jiangtao Xu, Huafeng Nie, Kaiming Nie, Weimin Jin
In this paper, an improved moment matching method based on a spatial correlation filter (SCF) and bilateral filter (BF) is proposed to correct the fixed-pattern noise (FPN) of a time-delay-integration CMOS image sensor (TDI-CIS). First, the values of row FPN (RFPN) and column FPN (CFPN) are estimated and added to the original image through SCF and BF, respectively. Then the filtered image will be processed by an improved moment matching method with a moving window. Experimental results based on a 128-stage TDI-CIS show that, after correcting the FPN in the image captured under uniform illumination, the standard deviation of row mean vector (SDRMV) decreases from 5...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29036142/standardized-target-specific-detectivity-metric-for-computational-imaging-systems
#12
Bradley L Preece, George Nehmetallah
Multifunctional cameras capable of performing a wide variety of nearly simultaneous imaging tasks are expected to play a major role in the near future. Computational imaging (CI) systems will serve as one of the main enabling technologies for multifunctional cameras, especially due to the abundance of low-cost, high-speed computational processing available today. An important aspect of these systems is to be able to quantify their performance with respect to specific imaging tasks. However, the non-traditional design of CI systems, both available and proposed, presents a considerable challenge to modeling, comparing, specifying, and measuring their performance...
September 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/29035801/systematic-review-with-meta-analysis-performance-of-dried-blood-spots-for-hepatitis-c%C3%A2-antibodies-detection
#13
REVIEW
B A Muzembo, N C Mbendi, S F Nakayama
OBJECTIVES: Dried blood spots (DBS) specimens can be used for hepatitis C virus (HCV) infection screening in cases where serum specimens are difficult to obtain. However, uncertainties surround the sensitivity and specificity of DBS for HCV antibodies (anti-HCV) serology testing. We aimed to evaluate the accuracy of DBS use to screen for HCV infection. STUDY DESIGN: We carried out a systematic review and meta-analysis. METHODS: Medline and EMBASE databases were searched for articles published between 1989 and November 2016...
October 13, 2017: Public Health
https://www.readbyqxmd.com/read/29035797/effects-of-gac-layer-on-the-performance-of-gravity-driven-membrane-filtration-gdm-system-for-rainwater-recycling
#14
An Ding, Jinlong Wang, Dachao Lin, Rong Zeng, Shengping Yu, Zhendong Gan, Nanqi Ren, Guibai Li, Heng Liang
Gravity-driven membrane filtration (GDM) is promising for decentralized rainwater recycling, owing to low maintenance and energy consumption. However, the organic removal by GDM process is sometimes undesirable and the quality of the permeate cannot meet the standard of water reuse. To improve this, granular activate carbon (GAC) was added as a particle layer on the membrane surface of GDM system. Additionally, a system with sand addition and a system with no particle addition were trialed as comparisons, to study the combined effects of particle hindering and adsorption on the removal efficacy of organics and the development of permeate flux...
October 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29035458/concordance-of-mutation-detection-in-circulating-tumor-dna-in-early-clinical-trials-using-different-blood-collection-protocols
#15
Lise B Ahlborn, Mette Madsen, Lars Jonson, Finn C Nielsen, Ulrik Lassen, Christina W Yde, Morten Mau-Sorensen
BACKGROUND: Small fragments of tumor DNA can be found in the circulation of cancer patients, providing a noninvasive access to tumor material (liquid biopsy). Analysis of circulating tumor DNA (ctDNA) has been used for diagnosis, treatment decisions, and detection of therapy resistance, including in patients with tumors inaccessible for biopsy, making ctDNA an important alternative source of tumor material. Immediate separation of plasma is widely used in standard isolation of cell-free DNA to ensure high quality plasma DNA...
October 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/29035076/internal-and-external-sources-of-variability-in-perceptual-decision-making
#16
Roger Ratcliff, Chelsea Voskuilen, Gail McKoon
It is important to identify sources of variability in processing to understand decision-making in perception and cognition. There is a distinction between internal and external variability in processing, and double-pass experiments have been used to estimate their relative contributions. In these and our experiments, exact perceptual stimuli are repeated later in testing, and agreement on the 2 trials is examined to see if it is greater than chance. In recent research in modeling decision processes, some models implement only (internal) variability in the decision process whereas others explicitly represent multiple sources of variability...
October 16, 2017: Psychological Review
https://www.readbyqxmd.com/read/29035068/effects-of-animal-assisted-therapy-on-concentration-and-attention-span-in-patients-with-acquired-brain-injury-a-randomized-controlled-trial
#17
Vanya Gocheva, Margret Hund-Georgiadis, Karin Hediger
OBJECTIVE: Previous studies have reported that brain-injured patients frequently suffer from cognitive impairments such as attention and concentration deficits. Numerous rehabilitation clinics offer animal-assisted therapy (AAT) to address these difficulties. The authors' aim was to investigate the immediate effects of AAT on the concentration and attention span of brain-injured patients. METHOD: Nineteen patients with acquired brain injury were included in a randomized, controlled, within-subject trial...
October 16, 2017: Neuropsychology
https://www.readbyqxmd.com/read/29035042/nmrml-a-community-supported-open-data-standard-for-the-description-storage-and-exchange-of-nmr-data
#18
Daniel Schober, Daniel Jacob, Michael Wilson, Joseph A Cruz, Ana Marcu, Jason R Grant, Annick Moing, Catherine Deborde, Luis F de Figueiredo, Kenneth Haug, Philippe Rocca-Serra, John M Easton, Timothy M D Ebbels, Jie Hao, Christian Ludwig, Ulrich L Günther, Antonio Rosato, Matthias S Klein, Ian Lewis, Claudio Luchinat, Andrew R Jones, Arturas Grauslys, Martin Larralde, Masashi Yokochi, Naohiro Kobayashi, Andrea Porzel, Julian Griffin, Mark R Viant, David S Wishart, Christoph Steinbeck, Reza M Salek, Steffen Neumann
NMR is a widely used analytical technique with a growing number of repositories available. As a result, demands for a vendor-agnostic, open data format for long-term archiving of NMR data have emerged with the aim to ease and encourage sharing, comparison and reuse of NMR data. Here we present nmrML, an open XML-based exchange and storage format for NMR spectral data. The nmrML format is intended to be fully compatible with existing NMR data for chemical, biochemical and metabolomics experiments. nmrML can capture raw NMR data, spectral data acquisition parameters and, where available, spectral metadata such as chemical structures associated with spectral assignments...
October 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29034988/the-global-filipino-nurse-an-integrative-review-of-filipino-nurses-work-experiences
#19
Jed Montayre, Jasmine Montayre, Eleanor Holroyd
AIM: To understand the work-related experiences of Philippine-trained nurses working globally. BACKGROUND: The Philippines is a major source country of foreign-trained nurses located globally. However, there is paucity of research on professional factors and career related issues affecting foreign-trained nurses' work experiences. METHODS: An integrative review through a comprehensive search of literature was undertaken from November 2015 and was repeated in August 2016...
October 16, 2017: Journal of Nursing Management
https://www.readbyqxmd.com/read/29034662/-the-lessons-of-the-ebola-epidemic-for-a-more-effective-preparedness-face-to-health-crises
#20
Anne Fortin, Joseph Vroh Benie Bi, Abdelkrim Soulimane
Although uncommon, public health crises cause considerable human suffering and death and have major political, economic and social impacts. For many years, countries have made considerable efforts to prepare for emergencies. The Ebola epidemic in West Africa, as well as recent events and emerging public health threats force countries to strengthen, adapt or implement their Emergency Preparedness Plans. Emergency Preparedness is a difficult process. Some authors would even say that it is an impossible mission...
October 2, 2017: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
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