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https://www.readbyqxmd.com/read/27932782/cdc-grand-rounds-modeling-and-public-health-decision-making
#1
Leah S Fischer, Scott Santibanez, Richard J Hatchett, Daniel B Jernigan, Lauren Ancel Meyers, Phoebe G Thorpe, Martin I Meltzer
Mathematical models incorporate various data sources and advanced computational techniques to portray real-world disease transmission and translate the basic science of infectious diseases into decision-support tools for public health. Unlike standard epidemiologic methods that rely on complete data, modeling is needed when there are gaps in data. By combining diverse data sources, models can fill gaps when critical decisions must be made using incomplete or limited information. They can be used to assess the effect and feasibility of different scenarios and provide insight into the emergence, spread, and control of disease...
December 9, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27932547/practice-to-evidence-using-evaluability-assessment-to-generate-practice-based-evidence-in-rural-south-georgia
#2
Sally Honeycutt, April Hermstad, Michelle L Carvalho, Kimberly R Jacob Arriola, Denise Ballard, Cam Escoffery, Michelle C Kegler
Evidence from formal evaluation of real-world practice can address gaps in the public health knowledge base and provide information about feasible, relevant strategies for varied settings. Interest in evaluability assessment (EA) as an approach for generating practice-based evidence has grown. EA has been central to several structured assessment processes that identify and select promising programs and evaluate those most likely to produce useful findings. The Emory Prevention Research Center used EA as part of an initiative to generate practice-based evidence for cancer prevention in southwest Georgia...
December 7, 2016: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/27932447/unloading-of-homologous-recombination-factors-is-required-for-restoring-double-stranded-dna-at-damage-repair-loci
#3
Yulia Vasianovich, Veronika Altmannova, Oleksii Kotenko, Matthew D Newton, Lumir Krejci, Svetlana Makovets
Cells use homology-dependent DNA repair to mend chromosome breaks and restore broken replication forks, thereby ensuring genome stability and cell survival. DNA break repair via homology-based mechanisms involves nuclease-dependent DNA end resection, which generates long tracts of single-stranded DNA required for checkpoint activation and loading of homologous recombination proteins Rad52/51/55/57. While recruitment of the homologous recombination machinery is well characterized, it is not known how its presence at repair loci is coordinated with downstream re-synthesis of resected DNA We show that Rad51 inhibits recruitment of proliferating cell nuclear antigen (PCNA), the platform for assembly of the DNA replication machinery, and that unloading of Rad51 by Srs2 helicase is required for efficient PCNA loading and restoration of resected DNA As a result, srs2Δ mutants are deficient in DNA repair correlating with extensive DNA processing, but this defect in srs2Δ mutants can be suppressed by inactivation of the resection nuclease Exo1...
December 8, 2016: EMBO Journal
https://www.readbyqxmd.com/read/27932010/bottleneck-analysis-approach-to-accelerate-newborn-care-services-in-two-regions-in-ghana-implications-for-national-newborn-care
#4
A E Yawson, J K Awoonor-Williams, I Sagoe-Moses, P K Aboagye, A O Yawson, L K Senaya, G Bonsu, J B Eleeza, E E A Agongo, H K Banskota
OBJECTIVE: The aim of this work is to describe application of a data-driven approach (bottleneck analysis [BNA] approach process) to accelerate newborn care services in two regions and what effect it had on national-level newborn care interventions in Ghana. STUDY DESIGN: A mixed-method approach was used for the study. The BNA tool generated quantitative data and group discussions provided phenomenological explanations to identified service gaps. METHODS: Regional newborn care health service assessments were conducted in November 2013 through desk reviews, field and health facility visits and coaching/mentorship...
December 2016: Public Health
https://www.readbyqxmd.com/read/27930718/seeing-the-invisible-revealing-atrial-ablation-lesions-using-hyperspectral-imaging-approach
#5
Narine Muselimyan, Luther M Swift, Huda Asfour, Tigran Chahbazian, Ramesh Mazhari, Marco A Mercader, Narine A Sarvazyan
BACKGROUND: Currently, there are limited means for high-resolution monitoring of tissue injury during radiofrequency ablation procedures. OBJECTIVE: To develop the next generation of visualization catheters that can reveal irreversible atrial muscle damage caused by ablation and identify viability gaps between the lesions. METHODS: Radiofrequency lesions were placed on the endocardial surfaces of excised human and bovine atria and left ventricles of blood perfused rat hearts...
2016: PloS One
https://www.readbyqxmd.com/read/27930717/a-patient-specific-polylactic-acid-bolus-made-by-a-3d-printer-for-breast-cancer-radiation-therapy
#6
So-Yeon Park, Chang Heon Choi, Jong Min Park, MinSoo Chun, Ji Hye Han, Jung-In Kim
PURPOSE: The aim of this study was to assess the feasibility and advantages of a patient-specific breast bolus made using a 3D printer technique. METHODS: We used the anthropomorphic female phantom with breast attachments, which volumes are 200, 300, 400, 500 and 650 cc. We simulated the treatment for a right breast patient using parallel opposed tangential fields. Treatment plans were used to investigate the effect of unwanted air gaps under bolus on the dose distribution of the whole breast...
2016: PloS One
https://www.readbyqxmd.com/read/27928726/evaluating-the-safety-profile-of-non-active-implantable-medical-devices-compared-with-medicines
#7
REVIEW
Josep Pane, Preciosa M Coloma, Katia M C Verhamme, Miriam C J M Sturkenboom, Irene Rebollo
Recent safety issues involving non-active implantable medical devices (NAIMDs) have highlighted the need for better pre-market and post-market evaluation. Some stakeholders have argued that certain features of medicine safety evaluation should also be applied to medical devices. Our objectives were to compare the current processes and methodologies for the assessment of NAIMD safety profiles with those for medicines, identify potential gaps, and make recommendations for the adoption of new methodologies for the ongoing benefit-risk monitoring of these devices throughout their entire life cycle...
December 7, 2016: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/27922019/nanomechanical-motion-transduction-with-a-scalable-localized-gap-plasmon-architecture
#8
Brian J Roxworthy, Vladimir A Aksyuk
Plasmonic structures couple oscillating electromagnetic fields to conduction electrons in noble metals and thereby can confine optical-frequency excitations at nanometre scales. This confinement both facilitates miniaturization of nanophotonic devices and makes their response highly sensitive to mechanical motion. Mechanically coupled plasmonic devices thus hold great promise as building blocks for next-generation reconfigurable optics and metasurfaces. However, a flexible approach for accurately batch-fabricating high-performance plasmomechanical devices is currently lacking...
December 6, 2016: Nature Communications
https://www.readbyqxmd.com/read/27920441/nanotechnology-for-environmentally-sustainable-electromobility
#9
Linda Ager-Wick Ellingsen, Christine Roxanne Hung, Guillaume Majeau-Bettez, Bhawna Singh, Zhongwei Chen, M Stanley Whittingham, Anders Hammer Strømman
Electric vehicles (EVs) powered by lithium-ion batteries (LIBs) or proton exchange membrane hydrogen fuel cells (PEMFCs) offer important potential climate change mitigation effects when combined with clean energy sources. The development of novel nanomaterials may bring about the next wave of technical improvements for LIBs and PEMFCs. If the next generation of EVs is to lead to not only reduced emissions during use but also environmentally sustainable production chains, the research on nanomaterials for LIBs and PEMFCs should be guided by a life-cycle perspective...
December 6, 2016: Nature Nanotechnology
https://www.readbyqxmd.com/read/27919238/an-equity-analysis-of-utilization-of-health-services-in-afghanistan-using-a-national-household-survey
#10
Christine Kim, Khwaja Mir Ahad Saeed, Ahmad Shah Salehi, Wu Zeng
BACKGROUND: Afghanistan has made great strides in the coverage of health services across the country but coverage of key indicators remains low nationally and whether the poorest households are accessing these services is not well understood. METHODS: We analyzed the Afghanistan Mortality Survey 2010 on utilization of inpatient and outpatient care, institutional delivery and antenatal care by wealth quintiles. Concentration indexes (CIs) were generated to measure the inequality of using the four services...
December 5, 2016: BMC Public Health
https://www.readbyqxmd.com/read/27918785/the-timecourse-of-expression-aftereffects
#11
Nichola Burton, Linda Jeffery, Jack Bonner, Gillian Rhodes
Adaptation to facial expressions produces aftereffects that bias perception of subsequent expressions away from the adaptor. Studying the temporal dynamics of an aftereffect can help us to understand the neural processes that underlie perception, and how they change with experience. Little is known about the temporal dynamics of the expression aftereffect. We conducted two experiments to measure the timecourse of this aftereffect. In Experiment 1 we examined how the size of the aftereffect varies with changes in the duration of the adaptor and test stimuli...
December 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/27918193/dna-barcodes-identify-medically-important-tick-species-in-canada
#12
Danielle A Ondrejicka, Kevin C Morey, Robert H Hanner
Medically important ticks (Acari: Ixodidae) are often difficult to identify morphologically. A standardized, molecular approach using a 658 base pair DNA barcode sequence (from the 5' region of the mitochondrial cytochrome c oxidase subunit I gene) was evaluated for its effectiveness in discriminating ticks in North America, with an emphasis on Canadian ticks. DNA barcodes were generated for 96 of 154 specimens representing 26 ixodid species. A genetic cluster analysis was performed on the barcode sequences, which separated specimens into haplogroups closely corresponding with morphologically identified species...
July 19, 2016: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/27917229/towards-organizing-health-knowledge-on-community-based-health-services
#13
Mohammad Akbari, Xia Hu, Liqiang Nie, Tat-Seng Chua
Online community-based health services accumulate a huge amount of unstructured health question answering (QA) records at a continuously increasing pace. The ability to organize these health QA records has been found to be effective for data access. The existing approaches for organizing information are often not applicable to health domain due to its domain nature as characterized by complex relation among entities, large vocabulary gap, and heterogeneity of users. To tackle these challenges, we propose a top-down organization scheme, which can automatically assign the unstructured health-related records into a hierarchy with prior domain knowledge...
December 2016: EURASIP Journal on Bioinformatics & Systems Biology
https://www.readbyqxmd.com/read/27916668/development-of-a-novel-real-time-rt-pcr-assay-to-detect-seneca-valley-virus-1-associated-with-emerging-cases-of-vesicular-disease-in-pigs
#14
Veronica L Fowler, Russell H Ransburgh, Elizabeth G Poulsen, Jemma Wadsworth, Donald P King, Valerie Mioulet, Nick J Knowles, Susanna Williamson, Xuming Liu, Gary A Anderson, Ying Fang, Jianfa Bai
Seneca Valley virus 1 (SVV-1) can cause vesicular disease that is clinically indistinguishable from foot-and-mouth disease, vesicular stomatitis and swine vesicular disease. SVV-1-associated disease has been identified in pigs in several countries, namely USA, Canada, Brazil and China. Diagnostic tests are required to reliably detect this emerging virus, and this report describes the development and evaluation of a novel real-time (r) reverse-transcription (RT) PCR assay (rRT-PCR), targeting the viral polymerase gene (3D) of SVV-1...
January 2017: Journal of Virological Methods
https://www.readbyqxmd.com/read/27914918/epigenetic-game-theory-how-to-compute-the-epigenetic-control-of-maternal-to-zygotic-transition
#15
REVIEW
Qian Wang, Kirk Gosik, Sujuan Xing, Libo Jiang, Lidan Sun, Vernon M Chinchilli, Rongling Wu
Epigenetic reprogramming is thought to play a critical role in maintaining the normal development of embryos. How the methylation state of paternal and maternal genomes regulates embryogenesis depends on the interaction and coordination of the gametes of two sexes. While there is abundant research in exploring the epigenetic interactions of sperms and oocytes, a knowledge gap exists in the mechanistic quantitation of these interactions and their impact on embryo development. This review aims at formulating a modeling framework to address this gap through the integration and synthesis of evolutionary game theory and the latest discoveries of the epigenetic control of embryo development by next-generation sequencing...
November 9, 2016: Physics of Life Reviews
https://www.readbyqxmd.com/read/27910932/oer-activity-manipulated-by-iro6-coordination-geometry-an-insight-from-pyrochlore-iridates
#16
Wei Sun, Ji-Yuan Liu, Xue-Qing Gong, Waqas-Qamar Zaman, Li-Mei Cao, Ji Yang
The anodic reaction of oxygen evolution reaction (OER), an important point for electrolysis, however, remains the obstacle due to its complicated reaction at electrochemical interfaces. Iridium oxide (IrO2) is the only currently known 5d transition metal oxide possessing admirable OER activity. Tremendous efforts have been carried out to enhance the activity of iridium oxides. Unfortunately there lies a gap in understanding what factors responsible for the activity in doped IrO2 or the novel crystal structure...
December 2, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27910580/analysis-of-magnetically-immersed-electron-guns-with-non-adiabatic-fields
#17
Alexander Pikin, James G Alessi, Edward N Beebe, Deepak Raparia, John Ritter
Electron diode guns, which have strongly varying magnetic or electric fields in a cathode-anode gap, were investigated in order to generate laminar electron beams with high current density using magnetically immersed guns. By creating a strongly varying radial electric field in a cathode-anode gap of the electron gun, it was demonstrated that the optical properties of the gun can be significantly altered, which allows the generation of a laminar, high-current electron beam with relatively low magnetic field on the cathode...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910225/two-new-non-centrosymmetric-selenides-azn4in5se12-a-rb-cs-synthesis-characterization-and-nonlinear-optical-properties
#18
Liming Wu, Hua Lin, Yu-Jun Zheng, Xiao-Ning Hu, Hong Chen, Ju-Song Yu
Two new non-centrosymmetric polar quaternary selenides, namely, RbZn4In5Se12 and CsZn4In5Se12, have been synthesized and structurally characterized. They exhibit 3D diamond-like framework (DLF) consisting of corner shared MSe4 (M = Zn/In) tetrahedra, in which the A+ ions are located. Both compounds are thermally stable up to 1300 K and exhibit large transmittance in the infrared region (0.65-25 μm) with measured optical band gaps of 2.06 eV for RbZn4In5Se12 and 2.11 eV for CsZn4In5Se12. Inspiringly, they exhibit good balance between strong second harmonic generation (SHG) efficiency (3...
December 1, 2016: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/27910022/high-resolution-fiber-fluorescence-in-situ-hybridization
#19
Christine J Ye, Henry H Heng
High resolution fiber-Fluorescence in situ hybridization (FISH) is an advanced FISH technology that can effectively bridge the resolution gap between probe hybridizing on DNA molecules and chromosomal regions. Since various types of DNA and chromatin fibers can be generated reflecting different degrees of DNA/chromatin packaging status, fiber-FISH technology has been successfully used in diverse molecular cytogenetic/cytogenomic studies. Following a brief review of this technology, including its major development and increasing applications, typical protocols to generate DNA/chromatin fiber will be described, coupled with rationales, as well as technical tips...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27909419/moving-stimuli-facilitate-synchronization-but-not-temporal-perception
#20
Susana Silva, São Luís Castro
Recent studies have shown that a moving visual stimulus (e.g., a bouncing ball) facilitates synchronization compared to a static stimulus (e.g., a flashing light), and that it can even be as effective as an auditory beep. We asked a group of participants to perform different tasks with four stimulus types: beeps, siren-like sounds, visual flashes (static) and bouncing balls. First, participants performed synchronization with isochronous sequences (stimulus-guided synchronization), followed by a continuation phase in which the stimulus was internally generated (imagery-guided synchronization)...
2016: Frontiers in Psychology
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