Results 61 to 70 of about 8,661,373 (377)

Optimum Small Optical Beam Displacement Measurement

, 2004
We derive the quantum noise limit for the optical beam displacement of a TEM00 mode. Using a multimodal analysis, we show that the conventional split detection scheme for measuring beam displacement is non-optimal with 80% efficiency.
Anderson D Z, Arnon S, Delaubert V, Denk W, Fabre C, Gittes F, Guo H-L, Magnus T L Hsu, Ping Koy Lam, Santhanakrishnan T, Simmons R M, Treps N, Treps N Delaubert V Maître A Courty J-M Fabre C, Vincent Delaubert, Warwick P Bowen   +14 more
core   +1 more source

TEM10 homodyne detection as an optimal small displacement and tilt measurements scheme [PDF]

, 2006
We report an experimental demonstration of optimal measurements of small displacement and tilt of a Gaussian beam - two conjugate variables - involving a homodyne detection with a TEM10 local oscillator.
Bachor, Hans A., Delaubert, Vincent, Fabre, Claude, Harb, Charles C., Lam, Ping Koy, Lassen, Mikael, Treps, Nicolas   +6 more
core   +3 more sources

Compact hollow waveguide mid-infrared gas sensor for simultaneous measurements of ambient CO2 and water vapor [PDF]

, 2020
A compact, sensitive and stable hollow waveguide (HWG) mid-infrared gas sensor, based on gas absorption lines using wavelength modulation spectroscopy with a second harmonic (WMS-2f) detection scheme, was developed for simultaneous measurements of ...
Chen, Weidong, He, Xing Dao, Hu, Rongjing, Kong, Weiping, Wang, Mengyu, Wu, Qiang, Wu, Tao, Ye, Chenwen   +7 more
core   +3 more sources

Development of a highly sensitive colloidal gold semiquantitative method for the determination of difenoconazole residues in citrus

Frontiers in Nutrition
IntroductionDifenoconazole (DIFE) is a common pesticide used in citrus cultivation; excessive intake can cause neurological damage to the organism, and the existing colloidal gold immunochromatographic test strips cannot meet the requirements for the ...
Ruobing Wang, Min Gong, Yang Liu, Weiran Zhu, Kai Zhang, Yidi Zhao, Chen Yin, Yuan Liu, Jian Wang, Yuping Wan, Yuping Wan   +10 more
doaj   +1 more source

Graphene and Perovskite-Based Nanocomposite for Both Electrochemical and Gas Sensor Applications: An Overview

Sensors, 2020
Perovskite and graphene-based nanocomposites have attracted much attention and been proven as promising candidates for both gas (H2S and NH3) and electrochemical (H2O2, CH3OH and glucose) sensor applications.
Tse-Wei Chen, Rasu Ramachandran, Shen-Ming Chen, Ganesan Anushya, Kumarasamy Ramachandran   +4 more
doaj   +1 more source

Batch Fabrication of Ultrasensitive Carbon Nanotube Hydrogen Sensors with Sub-ppm Detection Limit.

ACS Sensors, 2018
Carbon nanotube (CNT) has been considered as an ideal channel material for building highly sensitive gas sensors. However, the reported H2 sensors based on CNT always suffered from the low sensitivity or low production.
Mengmeng Xiao, Shibo Liang, Jie Han, Donglai Zhong, Jingxia Liu, Zhiyong Zhang, Lianmao Peng   +6 more
semanticscholar   +1 more source

Limits of modularity maximization in community detection [PDF]

Physical Review E, 2011
Modularity maximization is the most popular technique for the detection of community structure in graphs. The resolution limit of the method is supposedly solvable with the introduction of modified versions of the measure, with tunable resolution parameters.
Andrea Lancichinetti, Santo Fortunato
openaire   +4 more sources

The dual nature of TDC – bridging dendritic and T cells in immunity

FEBS Letters, EarlyView.
TDC are hematopoietic cells combining dendritic and T cell features. They reach secondary lymphoid organs (SLOs) and peripheral organs (liver and lungs) after FLT3‐dependent development in the bone marrow and maturation in the thymus. TDC are activated and enriched in SLOs upon viral infection, suggesting that they might play unique immune roles, since
Maria Nelli, Mirela Kuka
wiley   +1 more source

Numerical Optical Centroid Measurements

, 2013
Optical imaging methods are typically restricted to a resolution of order of the probing light wavelength $\lambda_p$ by the Rayleigh diffraction limit. This limit can be circumvented by making use of multiphoton detection of correlated $N$-photon states,
Evers, Jörg, Gulfam, Qurrat-ul-Ain
core   +1 more source

Tunable sensor response by voltage-control in biomimetic hair flow sensors [PDF]

, 2013
We present an overview of improvements in detection limit and responsivity of our biomimetic hair flow sensors by electrostatic spring-softening (ESS). Applying a DC-bias voltage to our capacitive flow sensors improves the responsively by up to 80% for ...
Bruinink, Christiaan M., Droogendijk, Harmen, Krijnen, Gijs J.M., Sanders, Remco G.P.   +3 more
core   +5 more sources