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https://www.readbyqxmd.com/read/28430229/light-scattering-from-normal-and-cervical-cancer-cells
#1
Xiaogang Lin, Nan Wan, Lingdong Weng, Yong Zhou
The light scattering characteristic plays a very important role in optic imaging and diagnostic applications. For optical detection of the cell, cell scattering characteristics have an extremely vital role. In this paper, we use the finite-difference time-domain (FDTD) algorithm to simulate the propagation and scattering of light in biological cells. The two-dimensional scattering cell models were set up based on the FDTD algorithm. The cell models of normal cells and cancerous cells were established, and the shapes of organelles, such as mitochondria, were elliptical...
April 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28426985/current-uses-of-ground-penetrating-radar-in-groundwater-dependent-ecosystems-research
#2
REVIEW
Catarina Paz, Francisco J Alcalá, Jorge M Carvalho, Luís Ribeiro
Ground penetrating radar (GPR) is a high-resolution technique widely used in shallow groundwater prospecting. This makes GPR ideal to characterize the hydrogeological functioning of groundwater-dependent ecosystems (GDE). This paper reviews current uses of GPR in GDE research through the construction of a database comprising 91 worldwide GPR case studies selected from the literature and classified according to (1) geological environments favouring GDE; (2) hydrogeological research interests; and (3) field technical and (4) hydrogeological conditions of the survey...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28422770/technical-alterations-during-an-incremental-field-test-in-elite-male-tennis-players
#3
Cyril Brechbuhl, Olivier Girard, Grégoire P Millet, Laurent Schmitt
PURPOSE: We investigated technical and physiological responses along with their relationships during an incremental field test to exhaustion specific to tennis (TEST) in elite players. METHODS: Twenty male elite tennis players completed TEST, which consisted of hitting alternatively forehand and backhand strokes at increasing ball frequency (ball machine) every minute. Ball accuracy (BA), ball velocity (BV) and tennis performance index (TP = BA x BV) were determined by radar and video analysis for each stroke, in addition to cardiorespiratory responses and blood lactate concentrations...
April 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28422681/fast-median-filtering-for-phase-or-orientation-data
#4
Martin Storath, Andreas Weinmann
Median filtering is among the most utilized tools for smoothing real-valued data, as it is robust, edge-preserving, valuepreserving, and yet can be computed efficiently. For data living on the unit circle, such as phase data or orientation data, a filter with similar properties is desirable. For these data, there is no unique means to define a median; so we discuss various possibilities. The arc distance median turns out to be the only variant which leads to robust, edge-preserving and value-preserving smoothing...
April 12, 2017: IEEE Transactions on Pattern Analysis and Machine Intelligence
https://www.readbyqxmd.com/read/28422184/sea-level-proxies-in-holocene-raised-beach-ridge-deposits-greenland-revealed-by-ground-penetrating-radar
#5
Lars Nielsen, Mette Bendixen, Aart Kroon, Mikkel Ulfeldt Hede, Lars B Clemmensen, Ronny Weβling, Bo Elberling
Identification of sea-level proxies is important for reconstruction of past sea-level variation. Methods for reconstructing Holocene relative sea-level curves are crucial for quantification of the impact of Greenland ice thickness variation on global sea level and vertical land movement. Arctic beach ridges constitute important potential archives of sea-level variation. However, their surface morphology may have undergone modification since deposition due to freezing/thawing processes and erosion, and their morphology may therefore not be trustworthy for sea-level reconstruction...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28417925/a-cost-effective-geodetic-strainmeter-based-on-dual-coaxial-cable-bragg-gratings
#6
Jihua Fu, Xu Wang, Tao Wei, Meng Wei, Yang Shen
Observations of surface deformation are essential for understanding a wide range of geophysical problems, including earthquakes, volcanoes, landslides, and glaciers. Current geodetic technologies, such as global positioning system (GPS), interferometric synthetic aperture radar (InSAR), borehole and laser strainmeters, are costly and limited in their temporal or spatial resolutions. Here we present a new type of strainmeters based on the coaxial cable Bragg grating (CCBG) sensing technology that provides cost-effective strain measurements...
April 12, 2017: Sensors
https://www.readbyqxmd.com/read/28417324/current-remote-sensing-approaches-to-monitoring-forest-degradation-in-support-of-countries-measurement-reporting-and-verification-mrv-systems-for-redd
#7
REVIEW
Anthea L Mitchell, Ake Rosenqvist, Brice Mora
Forest degradation is a global phenomenon and while being an important indicator and precursor to further forest loss, carbon emissions due to degradation should also be accounted for in national reporting within the frame of UN REDD+. At regional to country scales, methods have been progressively developed to detect and map forest degradation, with these based on multi-resolution optical, synthetic aperture radar (SAR) and/or LiDAR data. However, there is no one single method that can be applied to monitor forest degradation, largely due to the specific nature of the degradation type or process and the timeframe over which it is observed...
December 2017: Carbon Balance and Management
https://www.readbyqxmd.com/read/28417252/effects-of-parental-monitoring-and-knowledge-on-substance-use-and-hiv-risk-behaviors-among-young-men-who-have-sex-with-men-results-from-three-studies
#8
Brian Mustanski, Gregory Swann, Michael E Newcomb, Nikhil Prachand
Young men who have sex with men (YMSM) are disproportionately impacted by HIV/AIDS and have elevated rates of substance use. Parenting practices, such as knowledge of child whereabouts and monitoring of behavioral rules, protect against these outcomes among heterosexual youth. This article examined the relationship between these parenting practices and substance use and HIV risk behaviors among YMSM. Data are reported from three similar studies of YMSM: ChiGuys (ages 14-18), Crew 450 (ages 16-22), and RADAR (ages 16-29)...
April 17, 2017: AIDS and Behavior
https://www.readbyqxmd.com/read/28414990/medical-outcomes-associated-with-prescription-opioid-abuse-via-oral-and-non-oral-routes-of-administration
#9
Jody L Green, Becki Bucher Bartelson, M Claire Le Lait, Carl L Roland, Elizabeth T Masters, Jack Mardekian, J Elise Bailey, Richard C Dart
BACKGROUND: Prescription opioid abuse and misuse is a serious and growing public health issue. While the most common form of abuse is swallowing intact tablets/capsules, some abusers manipulate, or tamper with, these medications by altering the dosage form to allow for non-oral routes of administration (e.g., injection, inhalation) in order to achieve more rapid or enhanced psychoactive effects. Because administration of opioids via non-oral routes results in greater systemic availability and more rapid central nervous system penetration, we hypothesized that death and major medical outcomes occur more frequently with non-oral routes compared to oral route alone...
March 28, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28409576/-radar-as-imaging-tool-in-ecology-and-conservation-biology
#10
Piotr Matyjasiak
Migrations and dispersal are among the most important ecological processes that shape ecosystems and influence our economy, health and safety. Movements of birds, bats and insects occur in a large spatial scale - regional, continental, or intercontinental. However, studies of these phenomena using classic methods are usually local. Breakthrough came with the development of radar technology, which enabled researchers to study animal movements in the atmosphere in a large spatial and temporal scale. The aim of this article was to present the radar imaging methods used in the research of aerial movements of birds, bats and insects...
2017: Postepy Biochemii
https://www.readbyqxmd.com/read/28404990/aseismic-transient-during-the-2010-2014-seismic-swarm-evidence-for-longer-recurrence-of-m%C3%A2-%C3%A2-%C3%A2-6-5-earthquakes-in-the-pollino-gap-southern-italy
#11
Daniele Cheloni, Nicola D'Agostino, Giulio Selvaggi, Antonio Avallone, Gianfranco Fornaro, Roberta Giuliani, Diego Reale, Eugenio Sansosti, Pietro Tizzani
In actively deforming regions, crustal deformation is accommodated by earthquakes and through a variety of transient aseismic phenomena. Here, we study the 2010-2014 Pollino (Southern Italy) swarm sequence (main shock M W 5.1) located within the Pollino seismic gap, by analysing the surface deformation derived from Global Positioning System and Synthetic Aperture Radar data. Inversions of geodetic time series show that a transient slip, with the same mechanism of the main shock, started about 3-4 months before the main shock and lasted almost one year, evolving through time with acceleration phases that correlate with the rate of seismicity...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28403626/direct-factor-ixa-inhibition-with-the-rna-aptamer-pegnivacogin-reduces-platelet-reactivity-in-vitro-and-residual-platelet-aggregation-in-patients-with-acute-coronary-syndromes
#12
Dawid L Staudacher, Vera Putz, Lukas Heger, Jochen Reinöhl, Marcus Hortmann, Steven L Zelenkofske, Richard C Becker, Christopher P Rusconi, Christoph Bode, Ingo Ahrens
BACKGROUND: Residual platelet reactivity is a predictor of poor prognosis in patients with acute coronary syndromes (ACSs) undergoing percutaneous coronary intervention. Thrombin is a major platelet activator and upon initiation of the coagulation cascade, it is subsequently produced downstream of factor IXa, which itself is known to be increased in ACS. Pegnivacogin is a novel RNA-aptamer based factor IXa inhibitor featuring a reversal agent, anivamersen. We hypothesized that pegnivacogin could reduce platelet reactivity...
April 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28398267/hand-based-gesture-recognition-for-vehicular-applications-using-ir-uwb-radar
#13
Faheem Khan, Seong Kyu Leem, Sung Ho Cho
Modern cars continue to offer more and more functionalities due to which they need a growing number of commands. As the driver tries to monitor the road and the graphic user interface simultaneously, his/her overall efficiency is reduced. In order to reduce the visual attention necessary for monitoring, a gesture-based user interface is very important. In this paper, gesture recognition for a vehicle through impulse radio ultra-wideband (IR-UWB) radar is discussed. The gestures can be used to control different electronic devices inside a vehicle...
April 11, 2017: Sensors
https://www.readbyqxmd.com/read/28394932/radar-detection-of-pedestrian-induced-vibrations-on-michelangelo-s-david
#14
Massimiliano Pieraccini, Michele Betti, Davide Forcellini, Devis Dei, Federico Papi, Gianni Bartoli, Luca Facchini, Riccardo Corazzi, Vladimir Cerisano Kovacevic
This paper summarizes the results of a two-day dynamic monitoring of Michelangelo's David subject to environmental loads (city traffic and pedestrian loading induced by tourists visiting the Accademia Gallery). The monitoring was carried out by a no-contact technique using an interferometric radar, whose effectiveness in measuring the resonant frequencies of structures and historic monuments has proved over the last years through numerous monitoring activities. Owing to the dynamic behavior of the measurement system (radar and tripod), an accelerometer has been installed on the radar head to filter out the movement component of the measuring instrument from the measurement of the David's displacement...
2017: PloS One
https://www.readbyqxmd.com/read/28393064/exploring-systems-that-support-good-clinical-care-in-indigenous-primary-health-care-services-a-retrospective-analysis-of-longitudinal-systems-assessment-tool-data-from-high-improving-services
#15
Cindy Woods, Karen Carlisle, Sarah Larkins, Sandra Claire Thompson, Komla Tsey, Veronica Matthews, Ross Bailie
BACKGROUND: Continuous Quality Improvement is a process for raising the quality of primary health care (PHC) across Indigenous PHC services. In addition to clinical auditing using plan, do, study, and act cycles, engaging staff in a process of reflecting on systems to support quality care is vital. The One21seventy Systems Assessment Tool (SAT) supports staff to assess systems performance in terms of five key components. This study examines quantitative and qualitative SAT data from five high-improving Indigenous PHC services in northern Australia to understand the systems used to support quality care...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28387706/ground-penetrating-radar-as-a-contextual-sensor-for-multi-sensor-radiological-characterisation
#16
REVIEW
Ikechukwu K Ukaegbu, Kelum A A Gamage
Radioactive sources exist in environments or contexts that influence how they are detected and localised. For instance, the context of a moving source is different from a stationary source because of the effects of motion. The need to incorporate this contextual information in the radiation detection and localisation process has necessitated the integration of radiological and contextual sensors. The benefits of the successful integration of both types of sensors is well known and widely reported in fields such as medical imaging...
April 7, 2017: Sensors
https://www.readbyqxmd.com/read/28379174/a-review-of-wetland-remote-sensing
#17
REVIEW
Meng Guo, Jing Li, Chunlei Sheng, Jiawei Xu, Li Wu
Wetlands are some of the most important ecosystems on Earth. They play a key role in alleviating floods and filtering polluted water and also provide habitats for many plants and animals. Wetlands also interact with climate change. Over the past 50 years, wetlands have been polluted and declined dramatically as land cover has changed in some regions. Remote sensing has been the most useful tool to acquire spatial and temporal information about wetlands. In this paper, seven types of sensors were reviewed: aerial photos coarse-resolution, medium-resolution, high-resolution, hyperspectral imagery, radar, and Light Detection and Ranging (LiDAR) data...
April 5, 2017: Sensors
https://www.readbyqxmd.com/read/28375325/wave-amplitude-synthesis-applied-to-gaussian-beam-scattering-by-an-off-axis-sphere
#18
Dimitrios P Chrissoulidis, Elodie Richalot
Electromagnetic scattering of a Gaussian beam by an off-axis dielectric sphere is treated by the sum-of-waves formulation, which is inherent in Lorenz-Mie theory. Each "wave" is a spherical eigenvector, defined in the natural frame of the scatterer, and the coefficient of that wave is the "wave amplitude." Decomposition of the beam into homogeneous plane waves lays the ground for a synthesis of the wave amplitudes, which is done by an integration over the polar angle that defines the direction of propagation of the plane-wave constituents of the beam...
April 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/28368830/frequency-tracking-cw-doppler-radar-solving-small-angle-approximation-and-null-point-issues-in-non-contact-vital-signs-monitoring
#19
Marco Mercuri, Yao-Hong Liu, Ilde Lorato, Tom Torfs, Andre Bourdoux, Chris Van Hoof
A Doppler radar operating as a Phase-Locked-Loop (PLL) in frequency demodulator configuration is presented and discussed. The proposed radar presents a unique architecture, using a single channel mixer, and allows to detect contactless vital signs parameters while solving the null point issue and without requiring the small angle approximation condition. Spectral analysis, simulations, and experimental results are presented and detailed to demonstrate the feasibility and the operational principle of the proposed radar architecture...
March 29, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28368333/comparison-of-adaptive-spectral-estimation-for-vehicle-speed-measurement-with-radar-sensors
#20
Khairul Khaizi Mohd Shariff, Edward Hoare, Liam Daniel, Michail Antoniou, Mikhail Cherniakov
Vehicle speed-over-ground (SoG) radar offers significant advantages over conventional speed measurement systems. Radar sensors enable contactless speed measurement, which is free from wheel slip. One of the key issues in SoG radar is the development of the Doppler shift estimation algorithm. In this paper, we compared two algorithms to estimate a mean Doppler frequency accurately. The first is the center-of-mass algorithm, which based on spectrum center-of-mass estimation with a bandwidth-limiting technique...
April 2, 2017: Sensors
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