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18:27 EDT 17th June 2018 | BioPortfolio

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Showing "Relay Life something everybody Norwalk Reflector" PubMed Articles 1–25 of 9,000+

Narrowband silicon waveguide Bragg reflector achieved by highly ordered graphene oxide gratings.

Graphene oxide (GO) ultrathin film can be wafer-scale deposited by spin coating, can be patterned by laser interference lithography and oxygen plasma etching, can be thinned atomically (0.26 nm/min) and oxidized by ozone treatment, and is a relatively transparent and low-refractive-index material compared to pristine graphene. All those unique properties prompt us to realize a low-loss (∼5  dB/cm), high-extinction-ratio (19 dB), and narrowband (0.425 nm) GO/silicon hybrid waveguide Bragg reflector ...

Reconfigurable Yagi-Uda antenna based on a silicon reflector with a solid-state plasma.

This paper describes the fabrication and characterization of a reconfigurable Yagi-Uda antenna based on a silicon reflector with a solid-state plasma. The silicon reflector, composed of serially connected p-i-n diodes, forms a highly dense solid-state plasma by injecting electrons and holes into the intrinsic region. When this plasma silicon reflector is turned on, the front-realized gain of the antenna increases by more than 2 dBi beyond 5.3 GHz. To achieve the large gain increment, the structure of the ...

Analysis of channel uncertainty in ARQ relay networks.

Several power allocation algorithms for cooperative relay networks are presented in the literature. These contributions assume perfect channel knowledge and capacity achieving codes. However in practice, obtaining the channel state information at a relay or at the destination is an estimation problem and can generally not be error free. The investigation of the power allocation mechanism in a wireless network due to channel imperfections is important because it can severely degrade its performance regarding...

Field imaging near to the surface of terahertz reflective optics using a vector network analyzer.

A vector network analyzer-based quasi-optical measurement system that is suitable for mapping electric field intensity and phase near to the surface of terahertz reflective optics is presented. The system uses a fixed five parabolic mirror and transmitter/receiver head arrangement that has the benefit of requiring only the sample to be swept during measurement. The system has been tested with a micromilled aluminum zone plate reflector used as an exemplar structure. The measured focal point of the zone plat...

Regio and Stereoselective Heck-Matsuda Arylations of Trisubstituted Allylic Alkenols and their Silyl and Methyl Ether Derivatives to Access Two Contiguous Stereogenic Centers: Expanding the Redox-Relay Process and Application in the Total Synthesis of meso-Hexestrol.

Novel palladium-catalyzed redox-relay Heck arylation reactions of trisubstituted allylic alkenols were developed employing silyl and methyl ethers. The reactions proceeded under mild conditions in moderate to high yields in excellent anti diastereoselectivity to form α,β- disubstituted methyl ketones containing two contiguous stereocenters. The new redox-relay arylations using silyl and methyl ethers of the starting alkenols demonstrates that the presence of a free hydroxyl group is not a sine qua non con...

Diastereo- and Enantioselective Formal 3+2 Cycloaddition of Cyclopropyl Ketones and Alkenes via Ti-catalyzed Radical Redox Relay.

We report a stereoselective [3+2] cycloaddition of cyclopropyl ketones and radical-acceptor alkenes to form polysubstituted cyclopentane derivatives. Catalyzed by a chiral Ti(salen) complex, the cycloaddition occurs via a radical redox-relay mechanism and constructs two C-C bonds and two contiguous stereogenic centers with generally excellent diastereo- and enantioselectivity.

High salinity relay as a post-harvest processing method for reducing Vibrio vulnificus levels in oysters (Crassostrea virginica).

High salinity relay of Eastern oysters (Crassostrea virginica) was evaluated as a post-harvest processing (PHP) method for reducing Vibrio vulnificus. This approach relies on the exposure of oysters to natural high salinity waters and preserves a live product compared to previously approved PHPs. Although results of prior studies evaluating high salinity relay as a means to decrease V. vulnificus levels were promising, validation of this method as a PHP following approved guidelines is required. This study ...

Bisannulation of Benzamides and Cyclohexadienone-Tethered Allenes Triggered by Cp*Rh(III)-Catalyzed C-H Activation and Relay Ene Reaction.

The diastereoselective bisannulation of N-(pivaloyloxy)benzamides and cyclohexadienone-tethered allenes was accomplished through Cp*Rh(III)-catalyzed C-H activation and relay ene reaction, providing a 3-isoquinolonyl cis-hydrobenzofuran framework with high yields and diastereoselectivities. This reaction tolerates a wide range of functional groups, enabling further conversions to tricyclic and bridged-ring structures. Moreover, the dearomatization modification of phenol-contained bioactive molecule is also ...

Experimental demonstration of a single silicon ring resonator with an ultra-wide FSR and tuning range.

We present an experimental realization of a pseudo single-mode silicon ring resonator with an ultra-wide free spectral range and tuning range. The device is a single microring resonator with a tunable reflector integrated inside. The reflector is designed to have zero reflection for only one resonance of the ring, while all other resonances will suffer strong reflection. Given that the reflection inside a ring resonator leads to resonance splitting and degradation of the extinction ratio (ER), we obtain a r...

GeSn resonant-cavity-enhanced photodetectors on silicon-on-insulator platforms.

We report GeSn p-i-n resonant-cavity-enhanced photodetectors (RCEPDs) grown on silicon-on-insulator substrates. A vertical cavity, composed of a buried oxide as the bottom reflector and a deposited SiOlayer on the top surface as the top reflector, is created for the GeSn p-i-n structure to enhance the light-matter interaction. The responsivity experiments demonstrate that the photodetection range is extended to 1820 nm, completely covering all the telecommunication bands, because of the introduction of 2.5...

Priority Queue Based Reactive Buffer Management Policy for Delay Tolerant Network under City Based Environments.

Delay Tolerant Network (DTN) multi-copy routing protocols are privileged to create and transmit multiple copies of each message that causes congestion and some messages are dropped. This process is known as reactive drop because messages were dropped re-actively to overcome buffer overflows. The existing reactive buffer management policies apply a single metric to drop source, relay and destine messages. Hereby, selection to drop a message is dubious because each message as source, relay or destine may have...

Varying Success of Relaying To Reduce Vibrio parahaemolyticus Levels in Oysters ( Crassostrea virginica).

Vibrio parahaemolyticus is the leading cause of seafood-borne human infections in the United States, and many of these illnesses are associated with consumption of raw molluscan shellfish. V. parahaemolyticus levels in shellfish vary temporally and spatially with environmental conditions in and around production areas. The objective of this study was to study the potential for reducing levels of V. parahaemolyticus in live oysters by relaying them during higher-risk warm weather to a site with elevated sali...

Filtering characteristics of a three-lens slit spatial filter for high-power lasers.

Aiming for a three-lens slit spatial filtering system with excellent performances in inhibition of pinhole closure, improvement of beam quality, compactness of the system, and lowering the requirement of vacuum, the filtering characteristics and image relay of the slit spatial filter are demonstrated. The results show that the beam quality is greatly improved, and the system has a good property in image relay, which has potential applications in high-power lasers.

Exact and heuristic algorithms for Space Information Flow.

Space Information Flow (SIF) is a new promising research area that studies network coding in geometric space, such as Euclidean space. The design of algorithms that compute the optimal SIF solutions remains one of the key open problems in SIF. This work proposes the first exact SIF algorithm and a heuristic SIF algorithm that compute min-cost multicast network coding for N (N ≥ 3) given terminal nodes in 2-D Euclidean space. Furthermore, we find that the Butterfly network in Euclidean space is the second ...

A New Measure of Life Satisfaction: The Riverside Life Satisfaction Scale.

The Satisfaction With Life Scale (Diener, Emmons, Larsen, & Griffin, 1985) has been the dominant measure of life satisfaction since its creation more than 30 years ago. We sought to develop an improved measure that includes indirect indicators of life satisfaction (e.g., wishing to change one's life) to increase the bandwidth of the measure and account for acquiescence bias. In 3 studies, we developed a 6-item measure of life satisfaction, the Riverside Life Satisfaction Scale, and obtained reliability and...

Considering quality of life in end-of-life decisions for severely disabled children.

End-of-life decisions (EoLDs) are very difficult to make. How parents and physicians incorporate quality of life (QoL) considerations into their end-of-life decision making (EoLDM) for children with profound intellectual and multiple disabilities (PIMD) remains unknown.

Perhaps quality of life should not be used as a trigger for discussing resuscitation and advance care plans.

As a subjective measure, quality of life should not be used as a trigger for discussing resuscitation, goals of care or advanced care plans. Limitations and challenges in measurement and assessment of quality of life have been recognised. It is a fluid construct and subject to changes and response shifts. Surrogate quality of life estimations may misrepresent individual worth and self-perceived quality of life. Disagreement over quality of life statements may cause harm.

Systematic review of quality of life in Turner syndrome.

This study aimed to systematically review the available literature on "quality of life" (QoL) or "health-related quality of life" (HRQoL) in Turner syndrome (TS) patients and to analyze the relations among height, puberty, and the use of growth hormone (GH) and the QoL of TS patients.

An Interactive Real-Time Locating System Based on Bluetooth Low-Energy Beacon Network .

The ubiquity of Bluetooth-enabled smartphones and peripherals has brought tremendous convenience to our daily life. In recent years, Bluetooth beacons have also been gaining popularity in implementing a variety of innovative location-based services such as self-guided systems in exhibition centers. However, the broadcast-based beacon technology can only provide unidirectional communication. In case smartphone users would like to respond to the beacon messages, they have to rely on their own mobile Internet ...

"It was the best worst day of my life": Narrative Content, Structure, and Process in Wisdom-Fostering Life Event Memories.

The purpose of this study was to examine laypeople's subjective understanding of their own wisdom development. To do this, autobiographical memories of wisdom-fostering life events were examined for (a) life-event characteristics, and (b) self-reflective processes believed to support growth in wisdom through life experience.

Association of Early-Life Factors With Life-Course Trajectories of Resting Heart Rate: More Than 6 Decades of Follow-up.

Higher resting heart rate (RHR) is associated with increased risk of cardiovascular and all-cause mortality. Limited attention has been paid to early-life determinants of life-course RHR.

A National Portrait of Stepfamilies in Later Life.

Scholars have documented increases in the prevalence and complexity of stepfamilies earlier in the life course, but no one has systematically investigated U.S. stepfamily structure in later life. Guided by a family systems approach, we described the prevalence and composition of later-life stepfamilies.

Disparities in women's cancer-related quality of life by Southern Appalachian residence.

The purpose was to determine whether Appalachian residence alone or in combination with violence was linked to poorer quality of life (QOL).

Life-threatening or Nearly Life-threatening complications in Living Liver Donors.

To determine the relationship between a transplant center's experience and life-threatening or nearly life-threatening complications during living donor hepatectomy (LDH).

Endovascular repair of a penetrating aortic ulcer with a custom-made Relay stent-graft featuring a single celiac trunk fenestration and a superior mesenteric artery scallop.

We report the case of a 70-year-old man with an asymptomatic, fast-growing, paraceliac penetrating aortic ulcer (PAU). Guidelines recommend endovascular repair if an asymptomatic PAU shows a mean growth rate ≥5 mm per year: this patient's maximum aortic diameter was 47 mm but had increased 10 mm in the previous year. The very short sealing zones required a custom-made stent-graft. A custom-made Relay stent-graft with a single celiac trunk fenestration, a superior mesenteric artery (SMA) scallop measured a...

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