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Raja Shilpa Naresh - - 2013
A nanoscale, visible-light, self-sensing stress probe would be highly desirable in a variety of biological, imaging and materials engineering applications, especially a device that does not alter the mechanical properties of the material it seeks to probe. Here we present the CdSe-CdS tetrapod quantum dot, incorporated into polymer matrices via ...
Hu Wenqi - - 2013
Microrobots made of light-absorbing hydrogel material were actuated by optically induced thermocapillary flow and move at up to 700 µm/s. The micro-assembly capabilities of the microrobots were demonstrated by assembling polystyrene beads and yeast cells into various patterns on standard glass microscope slides. Two microrobots operating independently in parallel were ...
Wang Xiahui - - 2013
We report a simple method to prepare an array of polarization converters using a twisted-azimuthal nematic liquid crystal (NLC) in cylindrical polymer cavities. When a NLC is filled in a cylindrical polymer cavity, LC in the cavity presents concentrically circular orientations. By treating LC on one side of the cavity ...
Zhou Juan - - 2013
Hierarchical flower-like TiO2 with an anatase-rutile heterojunction was prepared by a hydrothermal process in the presence of titanium trichloride and poly(sodium-p-styrenesulfonate) (PSS). The morphology evolution process and formation mechanism of the as-obtained products were investigated in detail. It was found that morphology and crystalline phase can be easily adjusted by ...
Tehfe Mohamad-Ali - - 2013
For polymer synthesis upon visible light, actual photoinitiator operates in a restricted part of the spectrum. As a consequence, several photoinitiators are necessary to harvest all of the emitted visible photons. Herein, 2,7-di-tert-butyldimethyldihydropyrene is used for the first time as a multicolor photoinitiator for the cationic polymerization of epoxides. Upon ...
Lei Sidong - - 2013
We report the direct growth of large, atomically thin GaSe single crystals on insulating substrates by vapor phase mass transport. A correlation is identified between the number of layers and a Raman shift and intensity change. We found obvious contrast of the resistance of the material in the dark and ...
Poelma Justin E - - 2013
A facile approach to unique 3D, patterned polymer brushes is based on visible-light-mediated controlled radical polymerization. The temporal and spatial control of the polymerization allows the patterning of polymer brushes from a uniform initiating layer using a simple photomask. Furthermore, gradient polymer brushes, patterned block copolymers, and complex 3D structures ...
Bodrumlu E - - 2013
Aim: The purpose of this study was to compare the sealing ability of the three light-cured temporary restorative materials curing with two different light curing devices; halogen and LED. Methods: After the preparation of standard endodontic access cavities, the canal systems were instrumented by using a step-back technique irrigated with ...
Viger Mathieu L ML Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of NanoEngineering, University of California at San Diego, La Jolla, CA 92093, - - 2013
By encapsulating NaYF4 :Tm.Yb upconverting nanocrystals in UV-degradable polymer capsules, it is possible to access efficient polymer photodegradation and remotely controlled release using near-IR laser light at an unprecedentedly low power.
Loomis James - - 2013
The addition of nanomaterials to polymers can result not only in significant material property improvements, but also assist in creating entirely new composite functionalities. By dispersing graphene nanoplatelets (GNPs) within a polydimethylsiloxane matrix, we show that efficient light absorption by GNPs and subsequent energy transduction to the polymeric chains can ...
König Tobias Af - - 2013
We discuss the controlled sub-diffraction modulations of photosensitive polymer films which are induced by surface plasmon interference in striking contrast in well-known conventional microscopic gratings. The near-field light intensity patterns were generated at the nano-slits fabricated in a silver layer with the photosensitive polymer film placed above. We observed that ...
Cletus Biju - - 2013
Current concerns regarding terrorism and international crime highlight the need for new techniques for detecting unknown and hazardous substances. A novel Raman spectroscopy-based technique, spatially offset Raman spectroscopy (SORS), was recently devised for noninvasively probing the contents of diffusely scattering and opaque containers. Here, we demonstrate a modified portable SORS ...
Singh Vijay - - 2013
BACKGROUND CONTEXT: Lumbar foraminal stenosis is a common clinical problem and a significant cause of lower extremity radiculopathy. Minimal in vivo data exists quantifying changes in foraminal area (FA) as the spine moves from flexion to extension in the lumbar spine or on the relationship between FA and lumbar segmental angular ...
Clausen Kevin Kuhlmann - - 2013
An uneven change in climate across the Northern Hemisphere might severely affect the phenology of migrating animals, and especially long-distance migrating birds relying on local climatic cues to regulate the timing of migration. We examine the forward displacement of spring in both staging areas and breeding grounds of one such ...
Zhang Yunfang - - 2013
In this paper, we introduce a numerical simulation of a phase detecting surface plasmon resonance (SPR) scheme based on spectral interference. Based on the simulation, we propose a method to optimize various aspects of SPR sensors, which enables better performance in both measurement range (MR) and sensitivity. In the simulation, ...
Larranaga Nicolas - - 2013
Flight direction is a major component of animal's migratory success. However, few studies focused on variation in flight direction both between and within individuals, which is likely to be correlated with other traits implied in migration processes. We report patterns of intra- and inter-individual variation in flight direction in the ...
Wachowski Martin Michael - - 2013
We analyze how kinematic properties of C3/C4-segments are modified after total disc arthroplasty (TDA) with PRESTIGE(®) and BRYAN(®) Cervical Discs. The measurements were focused on small ranges of axial rotation (<0.8°) in order to investigate physiologic rotations, which frequently occur in vivo. Eight human segments were stimulated by triangularly varying, ...
Schuster Christian S - - 2013
Thin film solar cells benefit significantly from the enhanced light trapping offered by photonic nanostructures. The thin film is typically patterned on one side only due to technological constraints. The ability to independently pattern both sides of the thin film increases the degrees of freedom available to the designer, as ...
Miles Ronald - - 2013
A MEMS differential microphone is described in which the diaphragm design is inspired by the mechanics of directional hearing in the fly Ormia ochracea. The 1 mm by 3 mm diaphragm is designed to rotate about a central pivot in response to sound pressure gradients. The diaphragm is designed to ...
Pontes Luana Farias - - 2013
This study compared nanofilled and microhybrid composites polymerized by different light polymerization modes, and the effects these modes had on the mechanical properties of the composites. The following mechanical properties were measured: Vickers microhardness numbers, diametral tensile strength, flexural strength, and flexural modulus. The filler content (Wt%) present in the ...
Kwak Kiyeol - - 2013
In this study, we fabricate planar pn heterojunction diodes composed of Cu2O nanoparticle (NP) films and single ZnO nanowires (NWs) on SiO2 (300 nm)/Si substrates and investigate their characteristics in the dark and under the illumination of white light and 325 nm wavelength light. The diode at bias voltages of ...
de Moraes Porto Isabel Cristina Celerino - - 2013
Among the advice on prevent cross-infection was included usage of mechanical barriers on tips of photoactivation units. However, questions about the use of protective barriers placed on the light-curing unit's tips and the possibility of interference with the ability of guaranteeing an effective polymerization of composite resins need to be ...
Yoon Yang-Soo YS Division of Communication and Auditory Neuroscience, House Research Institute, Los Angeles, CA, - - 2013
This study investigated whether a spectral mismatch across ears influences the benefit of redundancy, squelch, and head shadow differently in speech perception using acoustic simulation of bilateral cochlear implant (CI) processing. Ten normal-hearing subjects participated in the study, and acoustic simulations of CIs were used to test these subjects. Sentence ...
Gidion Gunnar - - 2013
Recent developments in minimally invasive polymer-film sensors permit the in-situ detection of mechanical vibrations in musical instruments without significantly disturbing the acoustics of the instrument. As an example, we present measurements of vibrations of a violin between the feet of the bridge and the top plate. To this end, calibrated ...
Foulkes Timothy - - 2013
Concave curves are pleasing to the eye, but they cause a number of different acoustic anomalies. Depending on the radius of curvature, finish material, included angle, and position relative to source and receiver, one may hear a strong return echo, a noticeable coloration of the frequency balance, a dramatic shift ...
Mansour Hossein - - 2013
A detailed time-domain simulation is implemented to model the bowed cello string. Building on earlier simulation models, several new features have been added to make the model more realistic: in particular, both polarizations of the string motion are included, as well as the longitudinal vibrations of the bow hair. These ...
Nilsson Cecilia - - 2013
Abstract It has been suggested that birds migrate faster in spring than in autumn because of competition for arrival order at breeding grounds and environmental factors such as increased daylight. Investigating spring and autumn migration performances is important for understanding ecological and evolutionary constraints in the timing and speed of ...
Halimeh Jad C - - 2013
Carpet or ground-plane invisibility cloaks hide an object in reflection and inhibit transmission experiments by construction. This concept has significantly reduced the otherwise demanding material requirements and has hence enabled various experimental demonstrations. In contrast, free-space invisibility cloaks should work in both reflection and transmission. The fabrication of omnidirectional three-dimensional ...
Sabat Ribal Georges - - 2013
Various superimposed chirped relief gratings, acting as diffracting holographic lenses, were photo-inscribed on azo-polymer films upon exposure to the interference pattern of a plane and a curved laser light wavefronts. Depending on the configuration used, this resulted in incident light being focused independently of polarization along the 0th or 1st ...
Steckler Timothy T - - 2013
Near-infrared (NIR) polymer light-emitting diodes (PLEDs) based on a fluorene-dioctyloxyphenylene wide-gap host material copolymerized with a low-gap emitter are presented. Various loadings (1, 2.5, 10, 20 mol%) of the low-gap emitter are studied, with higher loadings leading to decreased efficiencies likely due to aggregation effects. While the 10 mol% loading ...
Mukharya Amit - - 2013
Lacidipine (LCDP) is chemically a "1, 4-dihydropyridine derivative" Ca+(2) channel blocker used as an antihypertensive. Type and extent of packaging have a strong influence on the photo-stability of the 1,4-dihydropyridine derivatives. In standard, light protection of drug substance/drug product can be obtained either by use of an opaque additive in ...
Suzuki Yuta - - 2013
By detecting ultrasonically tagged diffuse light, ultrasound-modulated optical tomography images optical contrast with ultrasonic resolution deep in turbid media, such as biological tissue. However, small detection etendues and weak tagged light submerged in strong untagged background light limit the signal detection sensitivity. In this Letter, we report the use of ...
Fiore Gina L - - 2013
Polymers that can easily be repaired after being damaged are attractive as this characteristic can improve the reliability, functionality, and lifetime of many products. In the last decade, researchers have thus developed new approaches to create stimuli-responsive polymer systems, which have the ability to autonomously heal or can be repaired ...
Zhang Lin - - 2013
By using a visible-light-excited ternary Eu(3+) complex, BHHBCB-Eu(3+)-BPT (BHHBCB: 1,2-bis[4'-(1",1",1",2",2",3",3"-heptafluoro-4″,6″-hexanedion-6″-yl)-benzyl]-4-chlorosulfobenzene; BPT: 2-(N,N-diethylanilin-4-yl)-4,6-bis(pyrazol-1-yl)-1,3,5-triazine), as a luminophore, two kinds of novel visible-light-excited europium materials, the silica-encapsulated BHHBCB-Eu(3+)-BPT (Eu@SiO2) nanoparticles and BHHBCB-Eu(3+)-BPT-conjugated bovine serum albumin (BSA-BHHBCB-Eu(3+)-BPT), were prepared for biolabeling and time-resolved luminescence cell imaging applications. The Eu@SiO2 nanoparticles, prepared by the copolymerization ...
Maleknejad Fatemeh - - 2013
Background: The degree of conversion of dental adhesive is an important parameter since poor mechanical properties are related to low percentage of monomer-to-polymer conversion within resin-based materials. Objectives: To evaluate the influence of polymerization time and light guide distance on the degree of conversion (DC) of three contemporary dental adhesives. ...
Helin-Tanninen M - - 2013
WHAT IS KNOWN AND OBJECTIVE: Admixtures of levobupivacaine, fentanyl and epinephrine are increasingly used in epidural pain management. Neither the compatibility nor the stability of levobupivacaine with fentanyl and epinephrine is known and therefore we examined the chemical, physical and microbiological stability of levobupivacaine-fentanyl-epinephrine and levobupivacaine-fentanyl admixtures prepared in the ...
Hu Run - - 2013
In a recent paper, Park et al. [Opt. Express 20(9), 10218 (2012)] demonstrated that large micro-size cube phosphors are an outstanding potential candidate for scatter-free phosphors in white phosphor-converted light-emitting diodes (pc-LEDs). They found that large micro-size cube phosphors can lead to higher luminous efficiency (LE), higher packaging efficiency (PE), ...
Guerra Patrick A - - 2013
Each fall, eastern North American monarch butterflies (Danaus plexippus) migrate from their northern range to their overwintering grounds in central Mexico [1-3]. Fall migrants are in reproductive diapause, and they use a time-compensated sun compass to navigate during the long journey south [4-6]. Eye-sensed directional cues from the daylight sky ...
Svensson T - - 2013
As manifested in the similarity relation of diffuse light transport, it is difficult to assess single scattering characteristics from multiply scattered light. We take advantage of the limited validity of the diffusion approximation of light transport and demonstrate, experimentally and numerically, that even deep into the multiple scattering regime, time-resolved ...
Honda Minoru - - 2013
Cerebellar long-term depression (LTD) and cortical spike-timing-dependent synaptic plasticity (STDP) are two well-known and well-characterized types of synaptic plasticity. Induction of both types of synaptic plasticity depends on the spike timing, pairing frequency, and pairing numbers of two different sources of spiking. This implies that the induction of synaptic plasticity ...
Walker Mary P - - 2013
Purpose: Difficult impression removal has been linked to high rigidity and hardness of elastomeric impression materials. In response to this concern, manufacturers have reformulated their materials to reduce rigidity and hardness to decrease removal difficulty; however, the relationship between impression removal and rigidity or hardness has not been evaluated. The ...
Haazen P P J - - 2013
Perpendicularly magnetized materials have attracted significant interest owing to their high anisotropy, which gives rise to extremely narrow, nanosized domain walls. As a result, the recently studied current-induced domain wall motion (CIDWM) in these materials promises to enable a new class of data, memory and logic devices. Here we propose ...
Stilp Christian E - - 2013
Stilp and Kluender [(2010). Proc. Natl. Acad. Sci. U.S.A. 107(27), 12387-12392] reported measures of sensory change over time (cochlea-scaled spectral entropy, CSE) reliably predicted sentence intelligibility for normal-hearing listeners. Here, implications for listeners with atypical hearing were explored using noise-vocoded speech. CSE was parameterized as Euclidean distances between biologically scaled ...
Gharaibeh Shadi F SF College of Pharmacy, Department of Pharmaceutical Technology, Jordan University of Science and Technology, Irbid, - - 2013
Displacement (D) vs. force (F) profiles obtained during compaction of powders have been reported by several researchers. These profiles are usually used to obtain mechanical energies associated with the compaction of powders. In this work, we obtained displacement-force data associated with the compression of six powders; Avicel PH101, Avicel PH301, ...
Tsao Yao-Chung - - 2013
The development of backside reflectors (BSRs) is crucial for the efficiency of future low cost thin-film silicon solar cells. In this work, the scattering efficiency of bare aluminum BSRs with different pore sizes and ordering of surface microstructures are investigated. The BSRs were fabricated by utilizing the process of self-ordering ...
Pennanen Antti M - - 2013
Coupling of light into a thin layer of high refractive index material by plasmonic nanoparticles has been widely studied for application in photovoltaic devices, such as thin-film solar cells. In numerous studies this coupling has been investigated through measurement of e.g. quantum efficiency or photocurrent enhancement. Here we present a ...
Horng Ray-Hua - - 2013
A wing-type imbedded electrodes was introduced into the lateral light emitting diode configuration (WTIE-LEDs) to reduce the effect of light shading of electrode in conventional sapphire-based LEDs (CSB-LEDs). The WTIE-LEDs with double-side roughened surface structures not only can eliminate the light shading of electrode and bonding wire, but also increase ...
Su Jung-Chieh - - 2013
To achieve a high transmittance and extinction ratio for the polarized white light-emitting diodes (WLEDs), the package structures of polarized WLEDs that are pumped by blue LEDs are studied. A WLED is implemented using a nano-wire grid polarizer (NWGP) and forms a pumping cavity. Combining the reflection and transmission characteristics ...
Kim Sae Hoon - - 2013
PURPOSE: This study compared the status of suture knots immediately after repair and after shoulder motion to evaluate the possibility of movement-induced knot migration to a location nearer the glenoid. METHODS: We included 10 shoulders from 5 cadavers in the study. After posterior capsulotomy, a Bankart lesion was created. A ...
Numata Munenori - - 2013
Developing new strategies for controlling polymer conformations through precise molecular recognition can potentially generate a machine-like motion that is dependent on molecular information-an important process for the preparation of new intelligent nanomaterials (e.g., polymer-based nanomachines) in the field bordering between polymer chemistry and conventional supramolecular sciences. Herein, we propose a ...
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