Results 101 to 110 of about 5,879,381 (333)

Remote Wideband Microwave Frequency Measurement Based on a Single-Passband Microwave Photonic Filter

open access: yesIEEE Photonics Journal, 2012
A new method for remote wideband microwave frequency measurement utilizing a single-passband microwave photonic filter is proposed, theoretically analyzed, and experimentally demonstrated. The frequencies of the input microwave signals can be measured by
Hongyan Fu, Zuowei Xu, Kun Zhu
doaj   +1 more source

Some recent advances in ab initio calculations of nonradiative decay rates of point defects in semiconductors [PDF]

open access: yes, 2019
In this short review, we discuss a few recent advances in calculating the nonradiative decay rates for point defects in semiconductors. We briefly review the debates and connections of using different formalisms to calculate the multi-phonon processes ...
Wang, L
core  

Fibrinogen Changes Before and After Intravenous Thrombolysis as Predictors of Cerebral Injury and Clinical Outcomes in Acute Ischemic Stroke: A Multicenter Prospective Cohort Study

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Plasma fibrinogen is essential in thrombosis and fibrinolysis, yet its dynamic changes pre‐ and post‐intravenous thrombolysis (IVT) for predicting brain injury severity and prognosis in acute ischemic stroke (AIS) patients remain unclear.
Wenhai Zhai   +28 more
wiley   +1 more source

Impact of Crosstalk on Indoor WDM Optical Wireless Communication Systems

open access: yesIEEE Photonics Journal, 2012
In this paper, we investigate the impact of optical crosstalk on our recently proposed indoor gigabit optical wireless (OW) communication system incorporating wavelength division multiplexing (WDM).
Ke Wang   +3 more
doaj   +1 more source

On Green's Formula [PDF]

open access: yesProceedings of the National Academy of Sciences, 1940
Not ...
openaire   +2 more sources

Hydrolysed formula and risk of allergic or autoimmune disease: systematic review and meta-analysis

open access: yesBritish medical journal, 2016
Objective To determine whether feeding infants with hydrolysed formula reduces their risk of allergic or autoimmune disease. Design Systematic review and meta-analysis, as part of a series of systematic reviews commissioned by the UK Food Standards ...
R. Boyle   +12 more
semanticscholar   +1 more source

Changes in Immune‐Inflammation Status and Acute Ischemic Stroke Prognosis in Prospective Cohort

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Background Inflammation is a critical risk factor for poor outcomes in cerebral infarction. Prior studies focused primarily on baseline inflammation status, neglecting dynamic longitudinal changes. We try to investigate the association between immune‐inflammation status alterations and stroke prognosis, and evaluated three systemic biomarkers'
Songfang Chen   +11 more
wiley   +1 more source

Fiber-Optic Temperature Sensor Based on Difference of Thermal Expansion Coefficient Between Fused Silica and Metallic Materials

open access: yesIEEE Photonics Journal, 2012
In this paper, we report a novel fiber-optic Fabry-Perot interferometric (FFPI) temperature sensor based on the difference of thermal expansion coefficient between fused silica and metallic materials. The sensor head is made by a single-mode fiber (SMF).
Xuefeng Li   +5 more
doaj   +1 more source

Use of Symptomatic Drug Treatment for Fatigue in Multiple Sclerosis and Patterns of Work Loss

open access: yesAnnals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To describe the use of central stimulants and amantadine for fatigue in MS and evaluate a potential association with reduced work loss in people with MS. Methods We conducted a nationwide, matched, register‐based cohort study in Sweden (2006 to 2023) using national registers with prospective data collection.
Simon Englund   +3 more
wiley   +1 more source

Shallow $\hbox{Ti:LiNbO}_{3}$ Strip Waveguide

open access: yesIEEE Photonics Journal, 2012
We report shallow single-mode Ti:LiNbO3 strip waveguides fabricated on Z-cut congruent LiNbO3 substrate by a two-step Ti-diffusion process, starting with the diffusion of a homogeneous Ti film at 1020°C for 2 h, followed by the diffusion of Ti ...
Ping-Rang Hua   +6 more
doaj   +1 more source

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