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https://www.readbyqxmd.com/read/28088051/online-recruitment-and-testing-of-infants-with-mechanical-turk
#1
Michelle Tran, Laura Cabral, Ronak Patel, Rhodri Cusack
Testing infants in the laboratory is expensive in time and money; consequently, many studies are underpowered, reducing their reproducibility. We investigated whether the online platform, Amazon Mechanical Turk (MTurk), could be used as a resource to more easily recruit and measure the behavior of infant populations. Using a looking time paradigm, with users' webcams we recorded how long infants aged 5 to 8months attended while viewing children's television programs. We found that infants (N=57) were more reliably engaged by some movies than by others and that the most engaging movies could maintain attention for approximately 70% of a 10- to 13-min period...
January 11, 2017: Journal of Experimental Child Psychology
https://www.readbyqxmd.com/read/28087348/the-eyes-of-children-with-celiac-disease
#2
Arzu Seyhan Karatepe Hashas, Orhan Altunel, Eylem Sevınc, Necati Duru, Bedirhan Alabay, Yasemin Altuner Torun
PURPOSE: To determine possible eye involvement in pediatric patients with celiac disease. METHODS: Children (aged 5-18 years) with classic celiac disease and sex- and age-matched controls were included. In addition to a complete ophthalmologic examination, all patients were scanned by a Scheimpflug camera and spectral domain optical coherence tomography, and Schirmer and break-up time (BUT) tests were performed. Data were evaluated by paired t test, with a P value of <0...
January 10, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/28087254/anti-diabetic-drug-metformin-dilates-retinal-blood-vessels-through-activation-of-amp-activated-protein-kinase-in-rats
#3
Asami Mori, Eriko Ishikawa, Tomoyo Amano, Kenji Sakamoto, Tsutomu Nakahara
The aim of this study was to examine whether metformin, a biguanide anti-hyperglycemic drug, dilates retinal blood vessels in rats. Ocular fundus images were captured with an original high-resolution digital fundus camera in vivo and diameters of retinal blood vessels were measured. Both systemic blood pressure and heart rate were continuously recorded. Metformin (0.01-0.3mg/kg/min) increased diameters of retinal blood vessels in a dose-dependent manner. This retinal vasodilator effect of metformin was abolished by compound C, an inhibitor of AMP-activated protein kinase (AMPK), and N(G)-nitro-L-arginine methyl ester, an inhibitor of nitric oxide (NO) synthase...
January 10, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28081245/sharp-tailed-grouse-nest-survival-and-nest-predator-habitat-use-in-north-dakota-s-bakken-oil-field
#4
Paul C Burr, Aaron C Robinson, Randy T Larsen, Robert A Newman, Susan N Ellis-Felege
Recent advancements in extraction technologies have resulted in rapid increases of gas and oil development across the United States and specifically in western North Dakota. This expansion of energy development has unknown influences on local wildlife populations and the ecological interactions within and among species. Our objectives for this study were to evaluate nest success and nest predator dynamics of sharp-tailed grouse (Tympanuchus phasianellus) in two study sites that represented areas of high and low energy development intensities in North Dakota...
2017: PloS One
https://www.readbyqxmd.com/read/28081089/direct-comparison-of-two-dimensional-and-three-dimensional-laser-induced-fluorescence-measurements-on-highly-turbulent-flames
#5
Lin Ma, Qingchun Lei, Tyler Capil, Stephen D Hammack, Campbell D Carter
This Letter reports the first direct comparison between two-dimensional (2D) and three-dimensional (3D) laser-induced fluorescence (LIF) applied to highly turbulent flames, with the goal of experimentally illustrating the capabilities and limitations of volumetric LIF (VLIF). To accomplish these goals, planar LIF (PLIF) and VLIF measurements were simultaneously performed on turbulent flames based on the CH radical. The PLIF measurements imaged a planar cross-section of the target flames across a 2D field-of-view (FOV) of 42  mm×42  mm...
January 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28081076/spatially-resolved-individual-particle-spectroscopy-using-photothermal-modulation-of-mie-scattering
#6
R M Sullenberger, S M Redmond, D Crompton, A M Stolyarov, W D Herzog
We report a photothermal modulation of Mie scattering (PMMS) method that enables concurrent spatial and spectral discrimination of individual micron-sized particles. This approach provides a direct measurement of the "fingerprint" infrared absorption spectrum with the spatial resolution of visible light. Trace quantities (tens of picograms) of material were deposited onto an infrared-transparent substrate and simultaneously illuminated by a wavelength-tunable intensity-modulated quantum cascade pump laser and a continuous-wave 532 nm probe laser...
January 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28081068/plasmonic-wavelength-splitter-based-on-a-metal-insulator-metal-waveguide-with-a-graded-grating-coupler
#7
Yue Yu, Jiangnan Si, Yaying Ning, Minghai Sun, Xiaoxu Deng
A plasmonic wavelength splitter based on a sub-wavelength metal-insulator-metal (MIM) periodic rectangle wrinkle waveguide with a graded grating coupler is theoretically analyzed and experimentally demonstrated. The surface plasmon polaritons (SPPs), excited in the metal grating with wavelength selection, are deflected by the graded difference according to the aplanatic parametric principle. The wave vector of the deflected SPPs meets the phase-matching condition and couples into the periodic rectangle wrinkle waveguide with a plasmonic bandgap...
January 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28079690/noncontact-evaluation-of-corneal-grafts-swept-source-fourier-domain-oct-versus-high-resolution-scheimpflug-imaging
#8
Eszter Szalai, Gábor Németh, Ziad Hassan, László Módis
PURPOSE: To study the reliability and repeatability of anterior segment measurements in patients who underwent penetrating keratoplasty with swept light source Fourier domain anterior segment optical coherence tomography (SS-OCT) in comparison with a high-resolution Scheimpflug camera. METHODS: Keratometry (K) and elevation data of the anterior and posterior corneal surfaces, central corneal thickness, and anterior chamber depth were determined in 56 postkeratoplasty eyes (mean age: 59...
January 11, 2017: Cornea
https://www.readbyqxmd.com/read/28078394/kinematics-of-a-bicruciate-retaining-total-knee-arthroplasty
#9
Thomas J Heyse, Joshua Slane, Geert Peersman, Margo Dirckx, Arne van de Vyver, Philipp Dworschak, Susanne Fuchs-Winkelmann, Lennart Scheys
PURPOSE: The recently reintroduced bicruciate-retaining Total Knee Arthroplasty (BCR TKA) is an interesting approach in the quest for close replication of knee joint biomechanics and kinematics closer to the native knee. Therefore, this study aimed at providing a detailed biomechanical view on the functional resemblance of BCR TKA to the native knee joint. METHODS: Seven fresh-frozen full leg cadaver specimens (76 ± 10 year) were mounted in a 6 degrees-of-freedom kinematic rig that applied a dynamic squatting motion knee flexion...
January 11, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28078072/multisensor-classification-system-for-triggering-fes-in-order-to-support-voluntary-swallowing
#10
Benjamin Riebold, Holger Nahrstaedt, Corinna Schultheiss, Rainer O Seidl, Thomas Schauer
In dysphagia the ability of elevating the larynx and hyoid is usually impaired. Electromyography (EMG) and Bioimpedance (BI) measurements at the neck can be used to trigger functional electrical stimulation (FES) of swallowing related muscles. Nahrstaedt et al.(1) introduced an algorithm to trigger the stimulation in phase with the voluntary swallowing to improve the airway closure and elevation speed of the larynx and hyoid. However, due to non-swallow related movements like speaking, chewing or head turning, stimulations might be unintentionally triggered...
September 15, 2016: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28076822/an-in-vitro-analysis-of-the-size-and-shape-of-cryolesions-for-facet-joint-denervation
#11
T Wolter, Y Bozhkov, S M Knoeller
OBJECTIVES: Lumbar facet joint syndrome (LFJS) is the cause of lower back pain in 15-54% of the patients. Clinical studies of cryotherapy for LFJS have reported promising outcomes. However, few studies have focused on the technical aspects of cryoneurolysis for LFJS. The aim of the study was to determine the size and shape of cryolesions in vitro and to determine how they are affected by the duration of freezing, size of the cryoprobe and distance and angulation to an osseous boundary layer...
January 4, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28076560/evaluation-of-anterior-segment-parameters-using-scheimpflug-technology-during-the-valsalva-maneuver-in-patients-with-keratoconus
#12
Yusuf Koçluk, Emine Alyamaç Sukgen, Selim Cevher
Purpose: This study aimed to explore the effects of the Valsalva maneuver (VM) on ectatic corneas during anterior segment tomography scans using a Scheimpflug camera. Methods: This prospective observational study included 100 eyes of 50 patients with bilateral keratoconus (KC). Anterior segment tomography was first performed when the patients were in a resting position and immediately repeated as the participant performed VM. Scheimpflug images were taken using a Pentacam®...
November 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28076444/wiseeye-next-generation-expandable-and-programmable-camera-trap-platform-for-wildlife-research
#13
Sajid Nazir, Scott Newey, R Justin Irvine, Fabio Verdicchio, Paul Davidson, Gorry Fairhurst, René van der Wal
The widespread availability of relatively cheap, reliable and easy to use digital camera traps has led to their extensive use for wildlife research, monitoring and public outreach. Users of these units are, however, often frustrated by the limited options for controlling camera functions, the generation of large numbers of images, and the lack of flexibility to suit different research environments and questions. We describe the development of a user-customisable open source camera trap platform named 'WiseEye', designed to provide flexible camera trap technology for wildlife researchers...
2017: PloS One
https://www.readbyqxmd.com/read/28074883/etalon-array-reconstructive-spectrometry
#14
Eric Huang, Qian Ma, Zhaowei Liu
Compact spectrometers are crucial in areas where size and weight may need to be minimized. These types of spectrometers often contain no moving parts, which makes for an instrument that can be highly durable. With the recent proliferation in low-cost and high-resolution cameras, camera-based spectrometry methods have the potential to make portable spectrometers small, ubiquitous, and cheap. Here, we demonstrate a novel method for compact spectrometry that uses an array of etalons to perform spectral encoding, and uses a reconstruction algorithm to recover the incident spectrum...
January 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28073590/objective-detection-of-apoptosis-in-rat-renal-tissue-sections-using-light-microscopy-and-free-image-analysis-software-with-subsequent-machine-learning-detection-of-apoptosis-in-renal-tissue
#15
Nayana Damiani Macedo, Aline Rodrigues Buzin, Isabela Bastos Binotti Abreu de Araujo, Breno Valentim Nogueira, Tadeu Uggere de Andrade, Denise Coutinho Endringer, Dominik Lenz
OBJECTIVE: The current study proposes an automated machine learning approach for the quantification of cells in cell death pathways according to DNA fragmentation. METHODS: A total of 17 images of kidney histological slide samples from male Wistar rats were used. The slides were photographed using an Axio Zeiss Vert.A1 microscope with a 40x objective lens coupled with an Axio Cam MRC Zeiss camera and Zen 2012 software. The images were analyzed using CellProfiler (version 2...
December 28, 2016: Tissue & Cell
https://www.readbyqxmd.com/read/28072912/temperature-mapping-in-hydrogel-matrices-using-unmodified-digital-camera
#16
Ghinwa H Darwish, Hassan H Fakih, Pierre Karam
We report a simple, generally applicable and noninvasive fluorescent method for mapping thermal fluctuations in hydrogel matrices using an unmodified commercially available digital single-lens reflex camera (DSLR). The nanothermometer is based on the complexation of short conjugated polyelectrolytes, poly-(phenylene ethynylene) carboxylate, with an amphiphilic polymer, polyvinylpyrrolidone, which is in turn trapped within the porous network of a gel matrix. Changes in the temperature lead to a fluorescent ratiometric response with a maximum relative sensitivity of 2...
January 10, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28072581/-131-i-activity-quantification-of-gamma-camera-planar-images
#17
Raquel Barquero, Hugo P Garcia, Monica G Incio, Pablo Minguez, Alexander Cardenas, Daniel Martínez, Michael Lassmann
A procedure to estimate the activity in target tissues in patients during the therapeutic administration of (131)I radiopharmaceutical treatment for thyroid conditions (hyperthyroidism and differentiated thyroid cancer) using a gamma camera (GC) with a high energy (HE) collimator, is proposed. Planar images are acquired for lesions of different sizes r, and at different distances d, in two HE GC systems. Defining a region of interest (ROI) on the image of size r, total counts n g are measured. Sensitivity S (cps MBq(-1)) in each acquisition is estimated as the product of the geometric G and the intrinsic efficiency η 0...
January 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28072400/prostate-cancer-light-camera-action-photodynamic-therapy-for-low-risk-disease
#18
Louise Stone
No abstract text is available yet for this article.
January 10, 2017: Nature Reviews. Urology
https://www.readbyqxmd.com/read/28071734/a-subwavelength-resolution-microwave-6-3%C3%A2-ghz-camera-based-on-a-metamaterial-absorber
#19
Yunsong Xie, Xin Fan, Yunpeng Chen, Jeffrey D Wilson, Rainee N Simons, John Q Xiao
The design, fabrication and characterization of a novel metamaterial absorber based camera with subwavelength spatial resolution are investigated. The proposed camera is featured with simple and lightweight design, easy portability, low cost, high resolution and sensitivity, and minimal image interference or distortion to the original field distribution. The imaging capability of the proposed camera was characterized in both near field and far field ranges. The experimental and simulated near field images both reveal that the camera produces qualitatively accurate images with negligible distortion to the original field distribution...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070792/wearable-cameras-are-useful-tools-to-investigate-and-remediate-autobiographical-memory-impairment-a-systematic-prisma-review
#20
REVIEW
Mélissa C Allé, Liliann Manning, Jevita Potheegadoo, Romain Coutelle, Jean-Marie Danion, Fabrice Berna
Autobiographical memory, central in human cognition and every day functioning, enables past experienced events to be remembered. A variety of disorders affecting autobiographical memory are characterized by the difficulty of retrieving specific detailed memories of past personal events. Owing to the impact of autobiographical memory impairment on patients' daily life, it is necessary to better understand these deficits and develop relevant methods to improve autobiographical memory. The primary objective of the present systematic PRISMA review was to give an overview of the first empirical evidence of the potential of wearable cameras in autobiographical memory investigation in remediating autobiographical memory impairments...
January 9, 2017: Neuropsychology Review
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