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https://www.readbyqxmd.com/read/28802448/user-perception-and-interpretation-of-tornado-probabilistic-hazard-information-comparison-of-four-graphical-designs
#1
Seyed M Miran, Chen Ling, Joseph J James, Alan Gerard, Lans Rothfusz
Effective design for presenting severe weather information is important to reduce devastating consequences of severe weather. The Probabilistic Hazard Information (PHI) system for severe weather is being developed by NOAA National Severe Storms Laboratory (NSSL) to communicate probabilistic hazardous weather information. This study investigates the effects of four PHI graphical designs for tornado threat, namely, "four-color"," red-scale", "grayscale" and "contour", on users' perception, interpretation, and reaction to threat information...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28800632/radar-a-novel-fast-screening-method-for-reading-difficulties-with-special-focus-on-dyslexia
#2
Ioannis Smyrnakis, Vassilios Andreadakis, Vassilios Selimis, Michail Kalaitzakis, Theodora Bachourou, Georgios Kaloutsakis, George D Kymionis, Stelios Smirnakis, Ioannis M Aslanides
Dyslexia is a developmental learning disorder of single word reading accuracy and/or fluency, with compelling research directed towards understanding the contributions of the visual system. While dyslexia is not an oculomotor disease, readers with dyslexia have shown different eye movements than typically developing students during text reading. Readers with dyslexia exhibit longer and more frequent fixations, shorter saccade lengths, more backward refixations than typical readers. Furthermore, readers with dyslexia are known to have difficulty in reading long words, lower skipping rate of short words, and high gaze duration on many words...
2017: PloS One
https://www.readbyqxmd.com/read/28794795/ground-penetrating-radar-a-case-study-for-estimating-root-bulking-rate-in-cassava-manihot-esculenta-crantz
#3
Alfredo Delgado, Dirk B Hays, Richard K Bruton, Hernán Ceballos, Alexandre Novo, Enrico Boi, Michael Gomez Selvaraj
BACKGROUND: Understanding root traits is a necessary research front for selection of favorable genotypes or cultivation practices. Root and tuber crops having most of their economic potential stored below ground are favorable candidates for such studies. The ability to image and quantify subsurface root structure would allow breeders to classify root traits for rapid selection and allow agronomist the ability to derive effective cultivation practices. In spite of the huge role of Cassava (Manihot esculenta Crantz), for food security and industrial uses, little progress has been made in understanding the onset and rate of the root-bulking process and the factors that influence it...
2017: Plant Methods
https://www.readbyqxmd.com/read/28792477/discrimination-of-oil-slicks-and-lookalikes-in-polarimetric-sar-images-using-cnn
#4
Hao Guo, Danni Wu, Jubai An
Oil slicks and lookalikes (e.g., plant oil and oil emulsion) all appear as dark areas in polarimetric Synthetic Aperture Radar (SAR) images and are highly heterogeneous, so it is very difficult to use a single feature that can allow classification of dark objects in polarimetric SAR images as oil slicks or lookalikes. We established multi-feature fusion to support the discrimination of oil slicks and lookalikes. In the paper, simple discrimination analysis is used to rationalize a preferred features subset...
August 9, 2017: Sensors
https://www.readbyqxmd.com/read/28783059/a-new-method-to-estimate-changes-in-glacier-surface-elevation-based-on-polynomial-fitting-of-sparse-icesat-glas-footprints
#5
Tianjin Huang, Li Jia, Massimo Menenti, Jing Lu, Jie Zhou, Guangcheng Hu
We present in this paper a polynomial fitting method applicable to segments of footprints measured by the Geoscience Laser Altimeter System (GLAS) to estimate glacier thickness change. Our modification makes the method applicable to complex topography, such as a large mountain glacier. After a full analysis of the planar fitting method to characterize errors of estimates due to complex topography, we developed an improved fitting method by adjusting a binary polynomial surface to local topography. The improved method and the planar fitting method were tested on the accumulation areas of the Naimona'nyi glacier and Yanong glacier on along-track facets with lengths of 1000 m, 1500 m, 2000 m, and 2500 m, respectively...
August 5, 2017: Sensors
https://www.readbyqxmd.com/read/28767059/hyperspectral-and-radar-airborne-imagery-over-controlled-release-of-oil-at-sea
#6
Sébastien Angelliaume, Xavier Ceamanos, Françoise Viallefont-Robinet, Rémi Baqué, Philippe Déliot, Véronique Miegebielle
Remote sensing techniques are commonly used by Oil and Gas companies to monitor hydrocarbon on the ocean surface. The interest lies not only in exploration but also in the monitoring of the maritime environment. Occurrence of natural seeps on the sea surface is a key indicator of the presence of mature source rock in the subsurface. These natural seeps, as well as the oil slicks, are commonly detected using radar sensors but the addition of optical imagery can deliver extra information such as thickness and composition of the detected oil, which is critical for both exploration purposes and efficient cleanup operations...
August 2, 2017: Sensors
https://www.readbyqxmd.com/read/28764511/a-small-spacecraft-for-multipoint-measurement-of-ionospheric-plasma
#7
T M Roberts, K A Lynch, R E Clayton, J Weiss, D L Hampton
Measurement of ionospheric plasma is often performed by a single in situ device or remotely using cameras and radar. This article describes a small, low-resource, deployed spacecraft used as part of a local, multipoint measurement network. A B-field aligned sounding rocket ejects four of these spin-stabilized spacecraft in a cross pattern. In this application, each spacecraft carries two retarding potential analyzers which are used to determine plasma density, flow, and ion temperature. An inertial measurement unit and a light-emitting diode array are used to determine the position and orientation of the devices after deployment...
July 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28760146/developing-harm-reduction-in-the-context-of-youth-substance-use-insights-from-a-multi-site-qualitative-analysis-of-young-people-s-harm-minimization-strategies
#8
Emily K Jenkins, Allie Slemon, Rebecca J Haines-Saah
BACKGROUND: Youth substance use programming and educational strategies are frequently informed by prevention approaches that emphasize abstinence goals, which often do not resonate with youth in their lack of acknowledgment of young people's social context and how young people perceive positive effects of substance use. Further, approaches to drug prevention have been critiqued as adopting a one-size-fits-all approach and therefore inadequate in addressing substance use in the context of population variation and inequities...
July 31, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28758970/practical-considerations-before-installing-ground-based-geodetic-infrastructure-for-integrated-insar-and-cgnss-monitoring-of-vertical-land-motion
#9
Amy L Parker, Will E Featherstone, Nigel T Penna, Mick S Filmer, Matt C Garthwaite
Continuously operating Global Navigation Satellite Systems (cGNSS) can be used to convert relative values of vertical land motion (VLM) derived from Interferometric Synthetic Aperture Radar (InSAR) to absolute values in a global or regional reference frame. Artificial trihedral corner reflectors (CRs) provide high-intensity and temporally stable reflections in SAR time series imagery, more so than naturally occurring permanent scatterers. Therefore, it is logical to co-locate CRs with cGNSS as ground-based geodetic infrastructure for the integrated monitoring of VLM...
July 31, 2017: Sensors
https://www.readbyqxmd.com/read/28758289/changes-in-misuse-and-abuse-of-prescription-opioids-following-implementation-of-extended-release-and-long-acting-opioid-analgesic-risk-evaluation-and-mitigation-strategy
#10
Becki Bucher Bartelson, M Claire Le Lait, Jody L Green, M Soledad Cepeda, Paul M Coplan, Jean-Yves Maziere, Gregory P Wedin, Richard C Dart
PURPOSE: An unintended consequence of extended-release (ER) and long-acting (LA) prescription opioids is that these formulations can be more attractive to abusers than immediate-release (IR) formulations. The US Food and Drug Administration recognized these risks and approved the ER/LA Opioid Analgesic Risk Evaluation and Mitigation Strategy (ER/LA REMS), which has a goal of reducing opioid misuse and abuse and their associated consequences. The primary objective of this analysis is to determine whether ER/LA REMS implementation was associated with decreased reports of misuse and abuse...
July 31, 2017: Pharmacoepidemiology and Drug Safety
https://www.readbyqxmd.com/read/28757573/unambiguous-imaging-of-static-scenes-and-moving-targets-with-the-first-chinese-dual-channel-spaceborne-sar-sensor
#11
Tingting Jin, Xiaolan Qiu, Donghui Hu, Chibiao Ding
Multichannel synthetic aperture radar (SAR) is a breakthrough given the inherent limitation between high-resolution and wide-swath (HRWS) faced with conventional SAR. This paper aims to obtain unambiguous imaging of static scenes and moving targets with the first Chinese dual-channel spaceborne SAR sensor. We propose an integrated imaging scheme with the dual-channel echoes. In the imaging scheme, the subspace-based error estimation algorithm is first applied to the spaceborne multichannel SAR system, followed by the reconstruction algorithm prior to imaging...
July 25, 2017: Sensors
https://www.readbyqxmd.com/read/28757571/preliminary-assessment-of-wind-and-wave-retrieval-from-chinese-gaofen-3-sar-imagery
#12
Weizeng Shao, Yexin Sheng, Jian Sun
The Chinese Gaofen-3 (GF-3) synthetic aperture radar (SAR) launched by the China Academy of Space Technology (CAST) has operated at C-band since September 2016. To date, we have collected 16/42 images in vertical-vertical (VV)/horizontal-horizontal (HH) polarization, covering the National Data Buoy Center (NDBC) buoy measurements of the National Oceanic and Atmospheric Administration (NOAA) around U.S. western coastal waters. Wind speeds from NDBC in situ buoys are up to 15 m/s and buoy-measured significant wave height (SWH) has ranged from 0...
July 25, 2017: Sensors
https://www.readbyqxmd.com/read/28757547/high-temporal-resolution-high-spatial-resolution-spaceborne-sar-based-on-continuously-varying-prf
#13
Zhirong Men, Pengbo Wang, Chunsheng Li, Jie Chen, Wei Liu, Yue Fang
Synthetic Aperture Radar (SAR) is a well-established and powerful imaging technique for acquiring high-spatial-resolution images of the Earth's surface. With the development of beam steering techniques, sliding spotlight and staring spotlight modes have been employed to support high-spatial-resolution applications. In addition to this strengthened high-spatial-resolution and wide-swath capability, high-temporal-resolution (short repeat-observation interval) represents a key capability for numerous applications...
July 25, 2017: Sensors
https://www.readbyqxmd.com/read/28753994/noncontact-sleep-study-by-multi-modal-sensor-fusion
#14
Ku-Young Chung, Kwangsub Song, Kangsoo Shin, Jinho Sohn, Seok Hyun Cho, Joon-Hyuk Chang
Polysomnography (PSG) is considered as the gold standard for determining sleep stages, but due to the obtrusiveness of its sensor attachments, sleep stage classification algorithms using noninvasive sensors have been developed throughout the years. However, the previous studies have not yet been proven reliable. In addition, most of the products are designed for healthy customers rather than for patients with sleep disorder. We present a novel approach to classify sleep stages via low cost and noncontact multi-modal sensor fusion, which extracts sleep-related vital signals from radar signals and a sound-based context-awareness technique...
July 21, 2017: Sensors
https://www.readbyqxmd.com/read/28752823/prospects-and-applications-near-ferroelectric-quantum-phase-transitions-a-key-issues-review
#15
Premala Chandra, Gilbert G Lonzarich, Stephen E Rowley, J F Scott
The emergence of complex and fascinating states of quantum matter in the neighborhood of zero temperature phase transitions suggests that such quantum phenomena should be studied in a variety of settings. Advanced technologies of the future may be fabricated from materials where the cooperative behavior of charge, spin and current can be manipulated at cryogenic temperatures. The progagating lattice dynamics of displacive ferroelectrics make them appealing for the study of quantum critical phenomena that is characterized by both space- and time-dependent quantities...
July 28, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28751778/a-decreasing-glacier-mass-balance-gradient-from-the-edge-of-the-upper-tarim-basin-to-the-karakoram-during-2000-2014
#16
Hui Lin, Gang Li, Lan Cuo, Andrew Hooper, Qinghua Ye
In contrast to the glacier mass losses observed at other locations around the world, some glaciers in the High Mountains of Asia appear to have gained mass in recent decades. However, changes in digital elevation models indicate that glaciers in Karakoram and Pamir have gained mass, while recent laser altimetry data indicate mass gain centred on West Kunlun. Here, we obtain results that are essentially consistent with those from altimetry, but with two-dimensional observations and higher resolution. We produced elevation models using radar interferometry applied to bistatic data gathered between 2011 and 2014 and compared them to a model produced from bistatic data collected in 2000...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28749359/systolic-time-interval-estimation-using-continuous-wave-radar-with-on-body-antennas
#17
Dilpreet Buxi, Evelien Hermeling, Marco Mercuri, Fabian Beutel, Roberto Garcia van der Westen, Tom Torfs, Jean-Michel Redoute, Mehmet Rasit Yuce
The estimation of systolic time interval (STI)s is done using continuous wave (CW) radar at 2.45GHz with an on-body antenna. MOTIVATION: In the state of the art, typically bioimpedance, heart sounds and / or ultrasound is used to measure STIs. All three methods suffer from insufficient accuracy of STI estimation due to various reasons. CW radar is investigated for its ability to overcome the deficiencies in the state of the art. METHODS: Ten healthy male subjects aged 25-45 were asked to lie down at a 30 degree incline...
July 25, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28746734/spatial-evaluation-of-indonesia-s-2015-fire-affected-area-and-estimated-carbon-emissions-using-sentinel-1
#18
Sandra Lohberger, Matthias Stängel, Elizabeth C Atwood, Florian Siegert
Fires raged once again across Indonesia in the latter half of 2015, creating a state of emergency due to poisonous smoke and haze across Southeast Asia as well as incurring great financial costs to the government. A strong El Niño-Southern Oscillation (ENSO) led to drought in many parts of Indonesia, resulting in elevated fire occurrence comparable with the previous catastrophic event in 1997/98. Synthetic Aperture Radar (SAR) data promise to provide improved detection of land use and land cover changes in the tropics as compared to methodologies dependent upon cloud and haze free images...
July 26, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28742107/analyzing-the-locomotory-gaitprint-of-caenorhabditis-elegans-on-the-basis-of-empirical-mode-decomposition
#19
Li-Chun Lin, Han-Sheng Chuang
The locomotory gait analysis of the microswimmer, Caenorhabditis elegans, is a commonly adopted approach for strain recognition and examination of phenotypic defects. Gait is also a visible behavioral expression of worms under external stimuli. This study developed an adaptive data analysis method based on empirical mode decomposition (EMD) to reveal the biological cues behind intricate motion. The method was used to classify the strains of worms according to their gaitprints (i.e., phenotypic traits of locomotion)...
2017: PloS One
https://www.readbyqxmd.com/read/28736797/victimization-mediates-the-longitudinal-association-between-depressive-symptoms-and-violent-behaviors-in-adolescence
#20
Rongqin Yu, Susan Branje, Wim Meeus, Hans M Koot, Pol van Lier, Seena Fazel
Despite evidence of a positive link between depressive symptoms and violent behaviors, the pathways underlying this longitudinal association remain unknown. Depressive symptoms might drive and reinforce victimization which in turn could increase risk of individuals becoming violent towards others. Thus, we tested whether victimization mediated the link between depressive symptoms and violent behaviors using a 6-year longitudinal study of a community sample of adolescents. The sample included 682 Dutch adolescents (54% boys) from an ongoing longitudinal study RADAR (Research on Adolescent Development and Relationships)...
July 24, 2017: Journal of Abnormal Child Psychology
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