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Vaillant Ghislain - - 2013
Motion occurring during MRI acquisition is a major factor of image quality degradation. Self-navigation can help reduce artefacts by estimating motion from the acquired data to enable motion correction. Popular self-navigation techniques rely on the availability of a fully-sampled motion-free reference to register the motion corrupted data with. In the ...
de Haan Gerard - - 2013
Remote photoplethysmography (rPPG) enables contactless monitoring of the blood volume pulse using a regular camera. Recent research focused on improved motion robustness, but the proposed blind source separation techniques (BSS) in RGB color space show limited success. We present an analysis of the motion problem, from which far superior chrominance-based ...
Ast Stefan - - 2013
We report the generation of squeezed vacuum states of light at 1550 nm with a broadband quantum noise reduction of up to 4.8 dB ranging from 5 MHz to 1.2 GHz sideband frequency. We used a custom-designed 2.6 mm long biconvex periodically-poled potassium titanyl phosphate (PPKTP) crystal. It featured reflectively ...
Feng Chaolu - - 2013
In PROPELLER, raw data are collected in N strips, each locating at the center of k-space and consisting of Mx sampling points in frequency encoding direction and L lines in phase encoding direction. Phase correction, rotation correction, and translation correction are used to remove artifacts caused by physiological motion and ...
Park Hangue - - 2013
We present a new noise shaping method and a dual polarity calibration technique suited for successive approximation register type analog to digital converters (SAR-ADC). Noise is pushed to higher frequencies with the noise shaping by adding a switched capacitor. The SAR capacitor array mismatch has been compensated by the dual-polarity ...
Isozaki Akihiro - - 2013
We propose a method to measure light transmittance of layered metamaterials by placing the metamaterials directly on a Si photodiode. Our measurement method enables the direct detection of transmitted light that appears as an evanescent wave in natural materials. Here, we report the transmittance measurements of a typical metamaterial using ...
Marx Charles Gordon - - 2013
: Most cortical auditory evoked potentials instruments provide a "default" peak-to-baseline (P-B) amplitude and a means for obtaining a peak-to-trough (P-T) measure. This study investigated the sensitivity of these two measures in assessing the effects of repeated runs on the P1 component of the electrophysiological response. : Cortical auditory evoked ...
Olgar T - - 2013
The purpose of this study was to evaluate the display performance of the liquid crystal display monitors according to the American association of physicists in medicine task group 18 (AAPM TG18) protocol at prior and after new calibration. We measured minimum and maximum luminance, luminance ratio, luminance and contrast response, ...
Yasin Ifat - - 2013
Estimates of human basilar membrane gain and compression obtained using temporal masking curve (TMC) and additivity of forward masking (AFM) methods with long-duration maskers or long masker-signal silent intervals may be affected by olivocochlear efferent activation, which reduces basilar membrane gain. The present study introduces a fixed-duration masking curve (FDMC) ...
Chen Yong - - 2013
A method based on motion vectors of feature points and particle filter has been proposed and developed for an active∕moving camera for object detection and tracking purposes. The object is detected by histogram of motion vectors first, and then, on the basis of particle filter algorithm, the weighing factors are ...
Castellini Claudio - - 2013
Intention detection is the interpretation of biological signals with the aim of automatically, reliably and naturally understanding what a human subject desires to do. Although intention detection is not restricted to disabled people, such methods can be crucial in improving a patient's life, e.g., aiding control of a robotic wheelchair ...
Caballero M A A - - 2013
The characterization of the spatial and frequency response of acoustic detectors is important for enabling accurate optoacoustic imaging. In this work, we developed a hybrid method for the characterization of the spatially dependent response of ultrasound detectors. The method is based on the experimental determination of the receive-mode electrical impulse ...
Idema Timon T Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands. - - 2013
The process of detecting and tracking biological features such as bacteria and nuclei is complicated by the fact that they constantly change their shape. Shape changes happen both continuously as the biological features grow and discontinuously as they divide or die. In this paper I present a new method of ...
Roren Alexandra - - 2013
Electromagnetic devices allow the non invasive and accurate measurement of 3D scapula kinematics. The acromial method allows continuous dynamic measurement using a skin surface sensor fixed to the acromion. Inter-session intra and inter-observer repeatability of 3D scapular kinematics have only been partially assessed for analytical movements and never for functional ...
Arichika Shigeta - - 2013
PURPOSE: To investigate erythrocyte aggregates in parafoveal capillaries by Adaptive Optics Scanning Laser Ophthalmoscopy (AO-SLO). METHODS: AO-SLO videos were acquired from the parafoveal areas of 1 eye in 10 healthy subjects. Erythrocyte aggregates were detected as "dark tails" that were darker regions than vessel shadows. The lengths of the dark ...
Wang Min - - 2013
A B-doped BiVO4 photocatalyst was synthesized by citric acid complex method and using H3BO3 as the dopant source, and the photocatalyst was characterized with XPS, XRD, SEM, BET and UV-Vis DRS. The photocatalytic activity was evaluated by the photocatalytic degradation of a methyl orange (MO) solution under visible light. This ...
Kelly John W - - 2013
The removal of spatially correlated noise is an important step in processing multichannel recordings. Here, a technique termed the adaptive common average reference (ACAR) is presented as an effective and simple method for removing this noise. The ACAR is based on a combination of the well-known common average reference (CAR) ...
Pail Martin - - 2013
OBJECTIVE: We compared the possible contribution (in the detection of seizure onset zone - SOZ) of simple visual assessment of intracerebrally recorded high-frequency oscillations (HFO) with standard automated detection. METHODS: We analyzed stereo-EEG (SEEG) recordings from 20 patients with medically intractable partial seizures (10 temporal/10 extratemporal). Independently using simple visual ...
Lopez-Poveda Enrique A EA Instituto de Neurociencias de Castilla y León, Universidad de Salamanca, Calle Pintor Fernando Gallego 1, 37007, Salamanca, Spain, - - 2013
In signal processing terms, the operation of the mammalian cochlea in the inner ear may be likened to a bank of filters. Based on otoacoustic emission evidence, it has been recently claimed that cochlear tuning is sharper for human than for other mammals. The claim was corroborated with a behavioral ...
Park Hyunik - - 2013
We report on a simple and reproducible method for fabricating InGaN/GaN multi-quantum-well (MQW) nanorod light-emitting diodes (LEDs), prepared by combining a SiO<sub>2</sub> nanosphere lithography and dry-etch process. Focused-ion-beam (FIB)-deposited Pt was contacted to both ends of the nanorod LEDs, producing bright electroluminescence from the LEDs under forward bias conditions. The ...
Bodnar Z M - - 2013
We analyzed a single-piece plate-type hydrophilic acrylic posterior chamber intraocular lens (IOL) that was explanted due to a progressive loss of vision, which occurred 6years after uncomplicated phacoemulsification. Gross and light microscopy, as well as anterior segment optical coherence tomography (OCT) revealed granular deposits below the IOL surface. Light scattering, ...
Luo Xiongbiao - - 2013
The paper presents a new endoscope motion tracking method that is based on a novel external endoscope tracking device and our modified stochastic optimization method for boosting endoscopy navigation. We designed a novel tracking prototype where a two-dimensional (2-D) motion sensor was introduced to directly measure the insertion-retreat linear motion ...
Gramatikov Boris - - 2013
BACKGROUND: The fovea, which is the most sensitive part of the retina, is known to have birefringent properties, i.e. it changes the polarization state of light upon reflection. Existing devices use this property to obtain information on the orientation of the fovea and the direction of gaze. Such devices employ ...
Tang Jianting - - 2013
A novel Ag3AsO4 photocatalyst has been prepared via a facile precipitation method. It exhibited higher activity than Ag3PO4 or AgI in degradation of rhodamine B or methyl orange. The excellent activity of Ag3AsO4 is attributed to its more separated photogenerated carriers and high absorption capacity of visible light.
Liu Lequan - - 2013
Broadband visible-light harvesting over TiO2 is achieved by introducing gold nanorods (Au NRs) as antennas based on localized surface plasmon resonance. Furthermore, surfactant removal is achieved by an HClO4 oxidative method. Not only transversal but also longitudinal plasma of Au NRs can induce photooxidation of 2-propanol, which extends the light harvesting to ...
Grindstaff Terry L - - 2013
The purpose of this study was to determine optimal stimulation parameters and calculation methods to estimate quadriceps voluntary activation while minimizing participant discomfort. Twelve healthy adults (8 males, 4 females; mean±SD, age=36.8±15.6 years, weight=76.1±12.9 kg, height=170.2±8.6 cm). Repeated maximal volitional isometric contractions (MVIC) were performed while imposing four stimulation combinations ...
Robert-Lachaine Xavier - - 2013
The scapulo-humeral rhythm quantifies shoulder joint coordination during arm elevation. The common method calculates a ratio of gleno-humeral (GH) elevation to scapulo-thoracic upward rotation angles. However the other rotations also contribute to arm elevation. The objective is to propose a 3D dynamic scapulo-humeral rhythm calculation method including all rotations of ...
Xiao Lin - - 2013
A mobile manipulator is a robotic device composed of a mobile platform and a stationary manipulator fixed to the platform. To achieve the repetitive motion control of mobile manipulators, the mobile platform and the manipulator have to realize the repetitive motion simultaneously. To do so, a novel quadratic performance index ...
Høye Gudrun - - 2013
Current high-resolution push-broom hyperspectral cameras introduce keystone errors to the captured data. Efforts to correct these errors in hardware severely limit the optical design, in particular with respect to light throughput and spatial resolution, while at the same time the residual keystone often remains large. The mixel camera solves this ...
Huang Zhi - - 2013
A new stray light analysis method and some suppression principles of panoramic annular lens (PAL) are introduced in this paper. The proposed method is to find stray light paths which are caused by ray splitting on two refractive surfaces of the PAL block and then cut them off. Following this ...
Kim Seung-Cheol - - 2013
A novel approach for fast generation of video holograms of three-dimensional (3-D) moving objects using a motion compensation-based novel-look-up-table (MC-N-LUT) method is proposed. Motion compensation has been widely employed in compression of conventional 2-D video data because of its ability to exploit high temporal correlation between successive video frames. Here, ...
Zhao Shuang - - 2013
In this paper, an illumination lens design for a LED-based pico-projector is presented. Different from the traditional illumination systems composed by lens group, the integral illumination lens consists of a total internal reflector (TIR) and a freeform surface. TIR acts as collimation lens and its top surface formed by a ...
Zhang Jie - - 2013
This paper introduces a hybrid control method that combines strain feedback control and charge driver. Strain feedback control method has good stability at low frequencies but suffers from limited resolution at high frequencies. The charge driver provides good linearity at high frequencies but exhibits drift at low frequencies. This study ...
Choi Jong Min - - 2013
Phonemes provide an interesting alternative to pure tones in hearing tests.We propose a new smartphone-based method for self-hearing assessment using the four Korean phonemes which are similar to the English phonemes /a/, /i/, /sh/, and /s/. We conducted tests on 15 subjects diagnosed with mild to severe hearing loss and ...
Yost William A WA Speech and Hearing Science, Arizona State University, P.O. Box 870102, Tempe, Arizona 85287, USA. - - 2013
Several measures of sound source localization performance of 45 listeners with normal hearing were obtained when loudspeakers were in the front hemifield. Localization performance was not statistically affected by filtering the 200-ms, 2-octave or wider noise bursts (125 to 500, 1500 to 6000, and 125 to 6000 Hz wide noise bursts). ...
Zhu Tao - - 2013
Chill in the light is the major environmental stress that cyanobacteria encounter in winter. Cyanobacterial cells may acquire chill-light tolerance upon exposure to low temperature in autumn and early winter. We sought to establish the efficacy of the dual-fluorescence method in detecting the viability of overwintering cyanobacteria and to provide ...
Zhang Zhijie - - 2013
A novel BiErWO6 photocatalyst with infrared responsive property was designed and synthesized by a simple hydrothermal method. The BiErWO6 photocatalyst exhibited high photocatalytic activity under an infrared lamp (λ > 700 nm).
Wong Lena L N - - 2013
OBJECTIVES:: It is often difficult to use an adaptive approach to evaluate speech reception in noise in cochlear implant (CI) users, because of variations in performance. Thus, two studies were conducted to develop an alternative method for scoring the Cantonese Hearing In Noise Test (CHINT) and to use this method ...
Chen Ling - - 2013
Plate- and octahedron-like Pt/Bi5Nb3O15 heterostructures are controllably prepared by a hydrothermal treatment method combined with photodeposition in the presence of different surfactants, i.e., cetyltrimethylammonium bromide (CTAB) and polyvinylpyrrolidone (PVP). The composition, structure, morphology, optical absorption properties, and textural properties of as-prepared Pt/Bi5Nb3O15 are well-characterized, and their simulated sunlight and visible-light ...
Rodrigo Sergio G - - 2013
We introduce an active, all-optical method for controlling the intensity and directionality of light scattering from single nanostructures. The method is based on the coherent interplay between linear light scattering and second-harmonic generation. The intensity and directionality of scattered light can be controlled by the phase delay and the relative ...
Garipelli Gangadhar - - 2013
Objective. Abundant literature suggests the use of slow cortical potentials (SCPs) in a wide spectrum of basic and applied neuroscience areas. Due to their low signal to noise ratio, these potentials are often studied using grand-average analysis, which conceals trial-to-trial information. Moreover, most of the single trial analysis methods in ...
Lin Shih-Syun - - 2013
A novel content-aware warping approach is introduced for video retargeting. The key to this technique is adapting videos to fit displays with various aspect ratios and sizes while preserving both visually salient content and temporal coherence. Most previous studies solve this spatiotemporal problem by consistently resizing content in frames. This ...
Lock Rj - - 2013
BACKGROUND: Serum free light chain analysis is now well established in the investigation of monoclonal gammopathies. In the UK there has, until recently, been a single supplier of kits for such analysis. Recently, a second method using monoclonal antisera was introduced. We have compared the performance of these two kits ...
Pollard Andrew E AE University of Alabama, Birmingham, AL 35294-0019, USA. - - 2013
This study was designed to test the feasibility of using sinusoidal approximation in combination with a new instrumentation approach to resolve complex impedance (uCI) spectra from heart preparations. To assess that feasibility, we applied stimuli in the 10-4000 Hz range and recorded potential differences (uPDs) in a four-electrode configuration that ...
Simpson Robin - - 2013
BACKGROUND: Three-directional phase velocity mapping (PVM) is capable of measuring longitudinal, radial and circumferential regional myocardial velocities. Current techniques use Cartesian k-space coverage and navigator-gated high spatial and high temporal resolution acquisitions are long. In addition, prospective ECG-gating means that analysis of the full cardiac cycle is not possible. The ...
Ari Samit S Department of Electronics and Communication Engineering, National Institute of Technology, Rourkela, India. - - 2013
Electrocardiogram (ECG), which is a noninvasive technique, is used generally as a primary diagnostic tool for cardiovascular diseases. In real-time scenario, noises like channel noise, muscle artifacts, electrode motion and baseline wander are often embedded with ECG signals during acquisition and transmission. In this paper, an automatic ECG signal enhancement ...
Aznar Marianne C - - 2013
BACKGROUND: With 4DCT the risk of introducing positional systematic errors in lung cancer radiotherapy can be minimised. A common approach is to plan on the phase bin of the 4DCT best representing the tumour's time-weighted mean position also called the midventilation scan. However breathing irregularities can introduce uncertainties and potentially ...
Barraco R - - 2013
Feature detection in biomedical signals is crucial for deepening our knowledge about the involved physiological processes. To achieve this aim, many analytic approaches can be applied but only few are able to deal with signals whose time dependent features provide useful clinical information. Among the biomedical signals, the electroretinogram (ERG), ...
Hötker Andreas M - - 2013
PURPOSE: Interventional radiology is performed in a sterile environment where speech and motion control of image review is needed to simplify and expedite routine procedures. The requirements and limitations were defined by testing an interventional radiology test bed speech and motion control system. METHODS: Motion control software was implemented using ...
Liu L - - 2013
Parameter adjustment of the transmitted light source yields a good-quality image for video measurement microscopy. However, a disadvantage is that the measured size of the objects changes simultaneously while the parameters of the transmitted light source are adjusted, which directly affects the measurement accuracy adversely. Furthermore, the variation of the ...
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