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https://www.readbyqxmd.com/read/28430208/illumination-data-transmission-and-energy-harvesting-the-threefold-advantage-of-vlc
#1
Harilaos G Sandalidis, Alexander Vavoulas, Theodoros A Tsiftsis, Nicholas Vaiopoulos
Visible light communication (VLC) is a promising technology that meets illumination and information transmission requirements in an indoor environment. Because light waves convey energy, a VLC link may exploit that fact for energy harvesting purposes. In this context, a single light emitting diode lamp located at a close distance over a tablet or laptop PC can potentially offer simultaneous lighting, Internet access, and battery recharging without cables. The present study introduces this threefold role of VLC systems by properly adapting some energy harvesting receiver architectures recently launched for usage in RF communications...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28428869/rapid-maximum-likelihood-ancestral-state-reconstruction-of-continuous-characters-a-rerooting-free-algorithm
#2
Eric W Goolsby
Ancestral state reconstruction is a method used to study the evolutionary trajectories of quantitative characters on phylogenies. Although efficient methods for univariate ancestral state reconstruction under a Brownian motion model have been described for at least 25 years, to date no generalization has been described to allow more complex evolutionary models, such as multivariate trait evolution, non-Brownian models, missing data, and within-species variation. Furthermore, even for simple univariate Brownian motion models, most phylogenetic comparative R packages compute ancestral states via inefficient tree rerooting and full tree traversals at each tree node, making ancestral state reconstruction extremely time-consuming for large phylogenies...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28425075/technical-note-real-time-web-based-wireless-visual-guidance-system-for-radiotherapy
#3
Danny Lee, Siyong Kim, Jatinder R Palta, Taeho Kim
Describe a Web-based wireless visual guidance system that mitigates issues associated with hard-wired audio-visual aided patient interactive motion management systems that are cumbersome to use in routine clinical practice. Web-based wireless visual display duplicates an existing visual display of a respiratory-motion management system for visual guidance. The visual display of the existing system is sent to legacy Web clients over a private wireless network, thereby allowing a wireless setting for real-time visual guidance...
April 19, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28418324/prosody-perception-and-production-in-children-with-hearing-loss-and-age-and-gender-matched-controls
#4
Rose Thomas Kalathottukaren, Suzanne C Purdy, Elaine Ballard
BACKGROUND: Auditory development in children with hearing loss, including the perception of prosody, depends on having adequate input from cochlear implants and/or hearing aids. Lack of adequate auditory stimulation can lead to delayed speech and language development. Nevertheless, prosody perception and production in people with hearing loss have received less attention than other aspects of language. The perception of auditory information conveyed through prosody using variations in the pitch, amplitude, and duration of speech is not usually evaluated clinically...
April 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28413619/picopore-a-tool-for-reducing-the-storage-size-of-oxford-nanopore-technologies-datasets-without-loss-of-functionality
#5
Scott Gigante
Oxford Nanopore Technologies' (ONT) MinION and PromethION long-read sequencing technologies are emerging as genuine alternatives to established Next-Generation Sequencing technologies. A combination of the highly redundant file format and a rapid increase in data generation have created a significant problem both for immediate data storage on MinION-capable laptops, and for long-term storage on lab data servers.  We developed Picopore, a software suite offering three methods of compression. Picopore's lossless and deep lossless methods provide a 25% and 44% average reduction in size, respectively, without removing any data from the files...
2017: F1000Research
https://www.readbyqxmd.com/read/28406937/cost-and-time-effective-method-for-multi-scale-measures-of-rugosity-fractal-dimension-and-vector-dispersion-from-coral-reef-3d-models
#6
G C Young, S Dey, A D Rogers, D Exton
We present a method to construct and analyse 3D models of underwater scenes using a single cost-effective camera on a standard laptop with (a) free or low-cost software, (b) no computer programming ability, and (c) minimal man hours for both filming and analysis. This study focuses on four key structural complexity metrics: point-to-point distances, linear rugosity (R), fractal dimension (D), and vector dispersion (1/k). We present the first assessment of accuracy and precision of structure-from-motion (SfM) 3D models from an uncalibrated GoPro™ camera at a small scale (4 m2) and show that they can provide meaningful, ecologically relevant results...
2017: PloS One
https://www.readbyqxmd.com/read/28399062/listening-effort-through-depth-of-processing-in-school-age-children
#7
Benson Cheng-Lin Hsu, Filiep Vanpoucke, Astrid van Wieringen
OBJECTIVES: A reliable and practical measure of listening effort is crucial in the aural rehabilitation of children with communication disorders. In this article, we propose a novel behavioral paradigm designed to measure listening effort in school-age children based on different depths and levels of verbal processing. The paradigm consists of a classic word recognition task performed in quiet and in noise coupled to one of three additional tasks asking the children to judge the color of simple pictures or a certain semantic category of the presented words...
April 10, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28393551/imitation-based-aphasia-therapy-increases-narrative-content-a-case-series
#8
E Susan Duncan, Steven L Small
OBJECTIVE: To test the generalization of an intensive imitation-based aphasia therapy to an unrelated narrative production task. DESIGN: ABA design study (A= no treatment; B= treatment) comparing imitation therapy to a baseline condition (pre-therapy). Participants produced narratives at two pre-therapy and two post-therapy time points. Narratives were analyzed for correct information units to determine the number and percent of communicative words produced. SETTING: A rehabilitation clinic and participants' homes...
April 1, 2017: Clinical Rehabilitation
https://www.readbyqxmd.com/read/28380036/simple-agarose-micro-confinement-array-and-machine-learning-based-classification-for-analyzing-the-patterned-differentiation-of-mesenchymal-stem-cells
#9
Nobuyuki Tanaka, Tadahiro Yamashita, Asako Sato, Viola Vogel, Yo Tanaka
The geometrical confinement of small cell colonies gives differential cues to cells sitting at the periphery versus the core. To utilize this effect, for example to create spatially graded differentiation patterns of human mesenchymal stem cells (hMSCs) in vitro or to investigate underpinning mechanisms, the confinement needs to be robust for extended time periods. To create highly repeatable micro-fabricated structures for cellular patterning and high-throughput data mining, we employed here a simple casting method to fabricate more than 800 adhesive patches confined by agarose micro-walls...
2017: PloS One
https://www.readbyqxmd.com/read/28369761/erythema-ab-igne-new-technology-rebounding-upon-its-users
#10
REVIEW
Fernanda Salgado, Marc Z Handler, Robert A Schwartz
Erythema ab igne (EAI) is a persistent, chronic skin condition resulting from prolonged exposure to infrared radiation, experienced as heat. Once associated with traditional warming sources like wood burning stoves or open fires, modern, infrared exposure originates also from newer sources like laptops and heating pads and may be creating a rebound of EAI. The epidemiology may be different too, with younger patients than previously seen. Localized EAI over an area of pain in the abdomen or lower back can be a sign of an underlying disorder, including cancer...
March 30, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28368835/lung-field-segmentation-in-chest-radiographs-from-boundary-maps-by-a-structured-edge-detector
#11
Wei Yang, Yunbi Liu, Liyan Lin, Zhaoqiang Yun, Zhentai Lu, Qianjin Feng, Wufan Chen
Lung field segmentation in chest radiographs (CXRs) is an essential preprocessing step in automatically analyzing such images. We present a method for lung field segmentation that is built on a high-quality boundary map detected by an efficient modern boundary detector, namely, a structured edge detector (SED). A SED is trained beforehand to detect lung boundaries in CXRs with manually outlined lung fields. Then, an ultrametric contour map (UCM) is transformed from the masked and marked boundary map. Finally, the contours with the highest confidence level in the UCM are extracted as lung contours...
March 27, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28362673/fixed-level-frequency-threshold-testing-for-ototoxicity-monitoring
#12
Catherine C Rieke, Odile H Clavier, Lindsay V Allen, Allison P Anderson, Chris A Brooks, Abigail M Fellows, Douglas S Brungart, Jay C Buckey
OBJECTIVES: Hearing loss from ototoxicity is often most pronounced at high frequencies. To improve patient monitoring and compliance, high-frequency testing methods should be short and easy to administer. We evaluated the repeatability and accuracy of a Békésy-like, fixed-level frequency threshold (FLFT) technique. This test takes less than a minute and could provide a rapid and effective way to determine the highest audible frequency. We hypothesized the FLFT test would be repeatable in normal-hearing subjects, and accurate when compared with Békésy fixed-frequency audiometry in the sensitive region for ototoxicity (SRO)...
March 30, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28350310/exploratory-study-of-rural-physicians-self-directed-learning-experiences-in-a-digital-age
#13
Vernon Curran, Lisa Fleet, Karla Simmons, Mohamed Ravalia, Pamela Snow
INTRODUCTION: The nature and characteristics of self-directed learning (SDL) by physicians has been transformed with the growth in digital, social, and mobile technologies (DSMTs). Although these technologies present opportunities for greater "just-in-time" information seeking, there are issues for ensuring effective and efficient usage to compliment one's repertoire for continuous learning. The purpose of this study was to explore the SDL experiences of rural physicians and the potential of DSMTs for supporting their continuing professional development (CPD)...
October 2016: Journal of Continuing Education in the Health Professions
https://www.readbyqxmd.com/read/28343042/in-situ-determination-of-trace-elements-in-fucus-spp-by-field-portable-xrf
#14
Andrew Turner, Hiu Poon, Alex Taylor, Murray T Brown
Fresh and freeze-dried sample sections of the coastal macroalgae, Fucus serratus and F. vesiculosus, and the brackish water macroalga, F. ceranoides, have been analysed for trace elements by field-portable-X-ray fluorescence (FP-XRF) spectrometry using a Niton XL3t in a low density mode with thickness correction. When analysed fresh in a laboratory accessory stand for a period of 200 seconds, As, Br, Fe and Zn were registered in the apex, mid-frond and lower stipe of all species, with detection limits of a few μg g(-1) (As) or a few tens of μg g(-1) (Br, Fe, Zn); when analysed dry under the same conditions, concentrations returned were systematically higher and Cu and Pb were detected in a number of F...
March 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28338865/assessment-of-public-exposure-form-wlans-in-the-west-bank-palestine
#15
Adnan Lahham, Afifeh Sharabati, Hussein ALMasri
A total of 271 measurements were conducted at 69 different sites including homes, hospitals, educational institutions and other public places to assess the exposure to radiofrequency emission from wireless local area networks (WLANs). Measurements were conducted at different distances from 40 to 10 m from the access points (APs) in real life conditions using Narda SRM-3000 selective radiation meter. Three measurements modes were considered at 1 m distance from the AP which are transmit mode, idle mode, and from the client card (laptop computer)...
March 3, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/28337073/real-time-dna-sequencing-in-the-antarctic-dry-valleys-using-the-oxford-nanopore-sequencer
#16
Sarah S Johnson, Elena Zaikova, David S Goerlitz, Yu Bai, Scott W Tighe
The ability to sequence DNA outside of the laboratory setting has enabled novel research questions to be addressed in the field in diverse areas, ranging from environmental microbiology to viral epidemics. Here, we demonstrate the application of offline DNA sequencing of environmental samples using a hand-held nanopore sequencer in a remote field location: the McMurdo Dry Valleys, Antarctica. Sequencing was performed using a MK1B MinION sequencer from Oxford Nanopore Technologies (ONT; Oxford, United Kingdom) that was equipped with software to operate without internet connectivity...
April 2017: Journal of Biomolecular Techniques: JBT
https://www.readbyqxmd.com/read/28336357/assessment-of-vestibulo-ocular-function-without-measuring-eye-movements
#17
Kara H Beaton, Michael Schubert, Mark Shelhamer
BACKGROUND: The vestibulo-ocular reflex (VOR) maintains stable gaze during head motion. Deficiencies lead to apparent world motion due to incomplete stabilization of eyes in space. VOR measurement requires specialized apparatus, trained operators, and significant setup time. NEW METHOD: We present a system (VON: vestibulo-ocular nulling) for rapid vestibulo-ocular assessment without measuring eye movements per se. VON uses a head-mounted motion sensor, laptop computer with user input control, and laser target whose position is controlled by the computer...
March 20, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28335373/dietary-patterns-and-insomnia-symptoms-in-chinese-adults-the-china-kadoorie-biobank
#18
Canqing Yu, Zumin Shi, Jun Lv, Yu Guo, Zheng Bian, Huaidong Du, Yiping Chen, Ran Tao, Ying Huang, Junshi Chen, Zhengming Chen, Liming Li
Limited attention has been paid to the effect of dietary patterns on sleep problems. In the present study, we analyzed the cross-sectional data of 481,242 adults aged 30-79 years from the China Kadoorie Biobank. A laptop-based questionnaire was administered to collect information on food intakes and insomnia symptoms. Logistic regression was used to estimate the odds ratios of each insomnia symptom according to quartiles of each dietary pattern, with adjustment for potential confounders. Two major dietary patterns were derived by factor analysis...
March 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28333274/making-room-for-interactivity-using-the-cloud-based-audience-response-system-nearpod-to-enhance-engagement-in-lectures
#19
Stephen McClean, William Crowe
Active and collaborative learning provides distinct advantages for students in higher education, yet can often be hampered by the barrier of large class sizes. Solutions that combine a 'bring your own device culture' with cloud-based technologies may facilitate a more interactive learning experience. In this pilot study, we describe the use of one such technology, Nearpod, to enhance interactivity in lectures delivered to pharmacy and bioscience students at Ulster University. Existing material in PowerPoint or Keynote format is uploaded to the instructor area of Nearpod, interactive elements are added, and the lecture is then broadcasted via the internet to student devices...
March 1, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28330832/virtual-versus-in-person-focus-groups-comparison-of-costs-recruitment-and-participant-logistics
#20
Douglas J Rupert, Jon A Poehlman, Jennifer J Hayes, Sarah E Ray, Rebecca R Moultrie
BACKGROUND: Virtual focus groups-such as online chat and video groups-are increasingly promoted as qualitative research tools. Theoretically, virtual groups offer several advantages, including lower cost, faster recruitment, greater geographic diversity, enrollment of hard-to-reach populations, and reduced participant burden. However, no study has compared virtual and in-person focus groups on these metrics. OBJECTIVE: To rigorously compare virtual and in-person focus groups on cost, recruitment, and participant logistics...
March 22, 2017: Journal of Medical Internet Research
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