Search Results
Results 1 - 50 of 859
1 2 3 4 5 6 7 8 9 10 >
Eckhardt Nadin N Max Planck Institute of Evolutionary Anthropology, Department of Primatology, Leipzig, - - 2014
Group living animals can exhibit fission-fusion behavior whereby individuals temporarily separate to reduce the costs of living in large groups. Primates living in groups with fission-fusion dynamics face numerous challenges in maintaining spatial cohesion, especially in environments with limited visibility. Here we investigated the spatial cohesion of adult male chimpanzees ...
Drewes Jan J Center for Mind/Brain Sciences (CIMeC), Trento University, Rovereto, Italy. Electronic address: - - 2014
The visual system constructs a percept of the world across multiple spatial and temporal scales. This raises the questions of whether different scales involve separate integration mechanisms and whether spatial and temporal factors are linked via spatio-temporal reference frames. We investigated this using Vernier Fusion, a phenomenon in which the ...
Whittingham Karen M KM School of Psychology, University of New South Wales, Sydney, NSW, 2052, Australia; School of Psychology, University of Sydney, Sydney, NSW, 2006, Australia. Electronic address: - - 2014
Idiopathic synesthesia, a neurological condition in which a stimulus in one sense generates a concurrent experience in a different sense, is often considered an example of multisensory integration. Consequently it has been suggested that synesthetes should experience multisensory illusions more consistently and compellingly than typical participants. To test this we ...
Brumshtein Boris B University of California, Los Angeles, United - - 2014
Systemic light-chain amyloidosis is a lethal disease characterized by excess immunoglobulin light-chains and light-chain fragments composed of variable domains, which aggregate into amyloid fibers. These fibers accumulate and damage organs. Some light-chains induce formation of amyloid fibers while others do not, making it unclear what distinguishes amyloid formers from non-formers. ...
Wenzler David L DL Department of Urology, Beaumont Health System, Royal Oak, MI, - - 2014
Sacral neuromodulation (SNM) is theorized to alter the neural pathways that mediate bladder and urethral sensation. We hypothesize that SNM affects current perception thresholds (CPTs) of afferent sensory nerve pathways. Eight women were enrolled and completed pre and postoperative testing. A CPT device was used to measure CPT at 5 Hz ...
Linder Tomas - - 2014
Fiber orientation is an important structural property in paper and other fibrous materials. In this study we explore the relation between light scattering and in-plane fiber orientation in paper sheets. Light diffusion from a focused light source is simulated using a Monte Carlo technique where parameters describing the paper micro-structure ...
Omobono Mark A MA Department of Surgery, Plastic Surgery Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, 02114; Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, - - 2014
This study investigated a dual crosslinking paradigm, consisting of (a) photocrosslinking with Rose Bengal (RB) and green light followed by (b) chemical crosslinking with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC), and N-hydroxysuccinimide (NHS) to enhance collagen gel stiffness. In group 1, 50 μL collagen constructs of 2% (w/v) type I collagen containing 10 μM ...
Kong Fanting - - 2014
Quantitative mode characterization of fibers with cores much beyond 50µm is difficult with existing techniques due to the combined effects of smaller intermodal group delays and dispersions. We demonstrate, for the first time, a new method using a matched white-light interferometry (MWI) to cancel fiber dispersion and achieve finer temporal ...
Novotny Steffen - - 2014
We present a picosecond supercontinuum light source designed for stroboscopic white-light interferometry. This source offers a potential for high-resolution characterization of vibrational fields in electromechanical components with frequencies up to the GHz range. The light source concept combines a gain-switched laser diode, the output of which is amplified in a ...
Hejazi Mahdi M Plant Physiology; Institute of Biochemistry and Biology; University of Potsdam; Potsdam-Golm, - - 2014
Starch phosphorylation mediated by the α-glucan, water dikinase (GWD) is crucial for transitory starch metabolism. The impact of the GWD action on transitory starch metabolism was analyzed in Arabidopsis mutants either lacking or revealing different reduced levels of GWD activity. In these mutants, glucose 6-phosphate (G6P) levels of the transitory ...
Woodward R I - - 2014
We characterize stimulated Brillouin scattering (SBS) of visible light in small-core photonic crystal fiber (PCF). Threshold powers under 532 nm excitation agree with established theory, in contrast to measured values up to five times greater than expected for Brillouin scattering of 1550 nm light. An isolated, single-peaked signal at a Stokes shift ...
Yoo Sang-Hwa - - 2014
We propose and demonstrate a 10-Gb/s dense wavelength-division-multiplexing (DWDM) optical system based on a pulsed-seed-light source employing a fiber-based Mach-Zehnder interferometer (F-MZI) as an intensity noise suppressor. The transmission results show that the required injection power into a reflective modulator was as low as -18 dBm. The F-MZI can accommodate ...
Hu Aijun A Key Laboratory of Food Nutrition and Safety (Tianjin University of Science & Technology), Ministry of Education, College of Food Engineering and Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, P.R. - - 2014
Ultrasound is widely used to accelerate many reactions and unit operations, but few studies have reported about its effects on starch properties and structure. The corn starch suspended in ethanol solution was treated by dual frequency ultrasound (DFU) and single frequency ultrasound (SFU). The results showed that the transparency of ...
Shen Changyu - - 2014
The scatterings of TE- and TM-polarized evanescent wave on the surface of a tilted fiber Bragg grating (TFBG) with a 50 nm thick gold coating were investigated experimentally by observing radiation patterns from discontinuities in the coating. The scattering intensity for TM-polarized light is larger than for TE light when ...
Blanco Carlos A CA Dpto. Ingeniería Agrícola y Forestal (Área de Tecnología de los Alimentos), E.T.S. Ingenierías Agrarias, Universidad de Valladolid , Palencia , - - 2014
Abstract The demand for light beers has led brewers to innovate by developing light beer. However, these products are not widely accepted in Europe compared to North America and Australasia because of their lack of fullness in the taste and low bitterness compared with conventional beer. The lower levels of ...
Pokhilko Alexandra A Institute for Complex Systems and Mathematical Biology, University of Aberdeen, - - 2014
In the light, photosynthesis provides carbon for metabolism and growth. In the dark, plant growth depends on carbon reserves that were accumulated during previous light periods. Many plants accumulate part of their newly-fixed carbon as starch in their leaves in the day and remobilise it to support metabolism and growth ...
Malinova Irina - - 2013
Activity of the plastidial phosphorylase isozyme (PHS1) is elevated in leaves of two starch-related single knock-out mutants lacking either the cytosolic transglucosidase, DPE2 or the plastidial maltose transporter, MEX. In both mutants metabolism of starch-derived maltose is impaired but inhibition is effective at different subcellular sites. Two constitutive double knock-out ...
Sulpice Ronan - - 2013
In short photoperiods plants accumulate starch more rapidly in the light and degrade it more slowly at night, ensuring that their starch reserves last until dawn. To investigate the accompanying changes in the timing of growth, Arabidopsis was grown in a range of photoperiods and analysed for rosette biomass, photosynthesis, ...
Ferrini G - - 2013
The effect of different thermal processing conditions just after fermentation on physicochemical parameters and sensory attributes of salami and chorizo slices dried by Quick-Dry-Slice process®, was evaluated. Meat and common additives were mixed, stuffed and fermented. Previous to drying the sausages were subjected to thermal treatment at 53°C at different ...
Zou L E - - 2013
Efficient inscription of Fiber Bragg gratings (FBGs) in single-mode, thin cladding As<sub>2</sub>S<sub>3</sub> fibers is demonstrated by using near bandgap light at 532 nm. The FBGs with the reflectivity of over 80% can be induced in only 80-90 s, substantially faster than in previous reports. The dynamics of the grating growth are investigated ...
Volotinen Tarja T - - 2013
The transmission properties and coupling of solar light have been studied for glass core multimode fibers in order to verify their benefits for a solar fiber optic lighting system. The light transportation distance can be extended from 20 m with plastic fibers to over 100 m with the kind of glass fibers ...
von Hoyningen-Huene Johannes - - 2013
Spatial light modulation can be used to address specific fiber modes, as required in mode-division multiplexed systems. We theoretically compare phase-only spatial light modulation to a combination of amplitude and phase spatial light modulation in terms of insertion loss and crosstalk for a fiber supporting 11 LP modes. We experimentally ...
Rao Megha Vaman MV Graduate Program in Mechanobiology, Mechanobiology Institute, National University of Singapore, - - 2013
We have developed an optogenetic technique for the activation of diaphanous-related formins. Our approach is based on fusion of the light-oxygen-voltage 2 domain of Avena sativa Phototrophin1 to an isolated Diaphanous Autoregulatory Domain from mDia1. This "caged" diaphanous auto-regulatory domain was inactive in the dark but in the presence of ...
Kolyadin Anton N - - 2013
In this paper we demonstrate the light transmission in a spectral range of 2.5 to 7.9 µm through a silica negative curvature hollow core fiber (NCHCF) with a cladding consisting of eight capillaries. A separation between the cladding capillaries was introduced to remove the additional resonances in the transmission bands. ...
Furman Adam C AC Department of Otology and Laryngology, Harvard Medical School, Boston, MA, - - 2013
Acoustic overexposure can cause a permanent loss of auditory nerve fibers without destroying cochlear sensory cells, despite complete recovery of cochlear thresholds (Kujawa and Liberman 2009), as measured by gross neural potentials such as the auditory brainstem response (ABR). To address this nominal paradox, we recorded responses from single auditory ...
Holdynski Zbyszek - - 2013
We demonstrate an experimental study of the chromatic dispersion properties for a series of microstructured fibers (MSFs) dedicated for a supercontinuum generation. With white-light interferometry application we analyze experimentally how the small variations of structural parameters, i.e. an air-hole diameter and a lattice constant, influence dispersion characteristics in different groups ...
Linze Nicolas - - 2013
In this paper we propose a novel kind of multi-point vibration sensor based on the polarization properties of light. Its principle relies on the combination of mechanical transducers with fiber Bragg gratings. When subject to vibrations, the mechanical transducers induce birefringence variations within the fiber and in turn modify the ...
Núñez Rubén - - 2013
Hybrid Lighting-CPV concept mixes illumination using low-cost fiber optics for light transmission with conventional Concentrating Photovoltaic (CPV) technology. This approach may offer an important increase in the value of a CPV system. Direct illumination from sunlight with fibers does not require the double light-electricity-light energy conversion allowing for efficient lighting ...
Li Qian - - 2013
In order to overcome the difficulty of the original polarizing microscope-based method in monitoring the gelatinization of starch, a new method for dynamically monitoring gelatinization process--integral optical density (IOD) which was based on digital image analysis technique, was proposed. Hot stage light microscopy and DSC technique were coupled to study ...
Wang Li - - 2013
Rice is an important staple crop throughout the world, but environmental stress like low-light conditions can negatively impact crop yield and quality. Using pot experiments and field experiments, we studied the effects of shading on starch pasting viscosity and starch content with six rice varieties for three years, using the ...
Kouadio Olivier Kouadio - - 2012
Total starch (TS) and resistant starch (RS) contents in pasty edible product of mealy and hard cooking tubers of three yam varieties and four cassava varieties were determined to evaluate their contribution in their cooking quality. TS and RS contents appeared as the main components in determining yam cooking quality. ...
Kim Hyuntai - - 2012
We propose a simple and efficient light launch scheme for a helical-core fiber (HCF) by using an adiabatically tapered splice technique, through which we overcome its inherent difficulty with light launch owing to the large lateral offset and angular tilt of its core. We experimentally demonstrate single-mode excitation in the ...
Hashimoto Takao T Center for Neurological Diseases, Aizawa Hospital, 2-5-1 Honjo, Matsumoto 390-8510, Japan. - - 2013
The ON and OFF channels are basic functional elements in parallel processing in the visual system in vertebrates including primates. We analysed the responses of the optic tract fibre activity in response to switching a flashlight on or off in 25 awake patients with Parkinson's disease who underwent stereotactic surgery ...
Belecki Katherine - - 2012
A light in the dark: the fermentation products of the polyketide synthase CalE8 (without its cognate thioesterase) were identified and gave some insight into the elusive early steps of calicheamicin biosynthesis. Fermentation in either the light or dark resulted in different proportions of a new octaketide and led to an ...
Gilly William F - - 2012
We studied the locomotion and behavior of Dosidicus gigas using pop-up archival transmitting (PAT) tags to record environmental parameters (depth, temperature and light) and an animal-borne video package (AVP) to log these parameters plus acceleration along three axes and record forward-directed video under natural lighting. A basic cycle of locomotor ...
Kano Takeshi - - 2012
Most robots are designed to work in predefined environments, and irregularities that exist in the environment interfere with their operation. For snakes, irregularities play the opposite role: snakes actively utilize terrain irregularities and move by effectively pushing their body against the scaffolds that they encounter. Autonomous decentralized control mechanisms could ...
Haith Adrian M - - 2012
Suppose that the purpose of a movement is to place the body in a more rewarding state. In this framework, slower movements may increase accuracy and therefore improve the probability of acquiring reward, but the longer durations of slow movements produce devaluation of reward. Here we hypothesize that the brain ...
Wu Yen-Hsun YH Department of Kinesiology, The Pennsylvania State University, Rec.Hall-267, University Park, PA 16802, - - 2012
We explored digit coordination during the acceleration phase of a quick lifting movement of a hand-held horizontal object. We tested three hypotheses related to: (1) the scaling of mechanical variables produced by the hand with changes in the external load, torque, and moment of inertia; (2) changes in the safety ...
Catelan Anderson - - 2012
Abstract Objective. To evaluate the degree of conversion (DC), flexural strength (FS) and Knoop microhardness (KHN) of direct and indirect composite resins polymerized with different curing systems. Materials and methods. Specimens of direct (Z250, 3M/Espe) and indirect (Sinfony, 3M/Espe) restorative materials were made and polymerized using two light curing units: ...
Kassavetis P P Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK. - - 2012
Adaptation of a rapid ballistic movement requires that commands for the next movement are updated on the basis of sensory error signals from the current movement. Previous experiments, mostly using visual feedback, have demonstrated that adaptation is highly sensitive to the timing of feedback and can be substantially impaired by ...
Bieńkiewicz Marta M N MM School of Psychology, Queen's University Belfast, David Keir Building, 18-30 Malone Road, Belfast BT9 5BN, UK. - - 2012
The prevailing paradigm for researching sensorimotor synchronisation in humans involves finger tapping and temporal accuracy measures. However, many successful sensorimotor synchronisation actions require not only to be 'in time', but also to be in a predefined spatial position. Reaching this spatial position in many everyday actions often exceeds the average ...
Manning Catherine - - 2012
The processing of speed is a critical part of a child's visual development, allowing children to track and interact with moving objects. Despite such importance, no study has investigated the developmental trajectory of speed discrimination abilities or precisely when these abilities become adult-like. Here, we measured speed discrimination thresholds in ...
Varley M C - - 2012
We quantified the acceleration and high-velocity running of elite Australian soccer players. We hypothesised that high-intensity activity would be underestimated when excluding acceleration during match analysis given its high metabolic demand and occurrence at low velocities. Player movements were observed from 29 players (forwards and central and wide defenders and ...
Liebermann D - - 2012
Virtual reality environments are increasingly being used for upper limb rehabilitation in post-stroke patients. Our goal was to determine if arm reaching movements made in a 2D video-capture virtual reality environment are similar to those made in a comparable physical environment. We compared arm and trunk kinematics for reaches made ...
Sowman Paul F PF ARC Centre of Excellence for Cognition and its Disorders (CCD), Macquarie University, Sydney, Australia. - - 2012
Event-related potentials (ERPs) to tones that are self-initiated are reduced in their magnitude in comparison with ERPs to tones that are externally generated. This phenomenon has been taken as evidence for an efference copy of the motor command acting to suppress the sensory response. However, self-initiation provides a strong temporal ...
James Eric G - - 2012
ABSTRACT Research on human rhythmic coordination has shown that the in-phase and antiphase coordination modes are typically stable and that the coordination of asymmetric effectors frequently exhibits fixed-point drift. The author extended research on symmetry breaking in coordination dynamics by examining a frequency-scaled unimanual pronation-supination task. The results showed symmetry ...
Sindall Paul - - 2012
PURPOSE: To examine the heart rate (HR) response and court movement variables during wheelchair tennis match-play for high (HIGH) and low (LOW) performance ranked players. Analysis of physiological and movement-based responses during match-play offers an insight into the demands of tennis, allowing for practical recommendations to be made. METHODS: Fourteen ...
Dong Zhang-Ye - - 2012
Objective Behavioral studies have suggested a low-frequency (0.05 Hz) fluctuation of sustained attention on the basis of the intra-individual variability of reaction-time. Conventional task designs for functional magnetic resonance imaging (fMRI) studies are not appropriate for frequency analysis. The present study aimed to propose a new paradigm, real-time finger force ...
Friston Karl K The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK. - - 2012
How much about our interactions with--and experience of--our world can be deduced from basic principles? This paper reviews recent attempts to understand the self-organised behaviour of embodied agents, like ourselves, as satisfying basic imperatives for sustained exchanges with the environment. In brief, one simple driving force appears to explain many ...
Koutakis Panagiotis P Department of Surgery, University of Nebraska Medical Center, Omaha, NE 68182-0216, United - - 2013
Path integration refers to the ability to integrate continuous information of the direction and distance traveled by the system relative to the origin. Previous studies have investigated path integration through blindfolded walking along simple paths such as straight line and triangles. However, limited knowledge exists regarding the role of path ...
1 2 3 4 5 6 7 8 9 10 >