Results 51 to 60 of about 104,727 (309)

Comparing laser and polychromatic confocal optical displacement sensors for the 3D measurement of cylindrical artefacts containing microscopic grooved structures. [In special issue: Metrology and Properties of Engineering Surfaces]

open access: yes, 2009
A scanning system has been developed for measuring the surface of early cylinder mechanical sound recordings to high precision, both for surface preservation and for post-processing of the data to recover the sound encoded in the grooves.
Hill, M., Boltryk, P.J., McBride, J.W.
core   +1 more source

Mathematical modelling and experimental validation of electrostatic sensors for rotational speed measurement [PDF]

open access: yes, 2014
Recent research has demonstrated that electrostatic sensors can be applied to the measurement of rotational speed with excellent repeatability and accuracy under a range of conditions. However, the sensing mechanism and fundamental characteristics of the
Yan, Yong, Wang, Lijuan
core   +1 more source

Practical Considerations for Laser-Induced Graphene Pressure Sensors Used in Marine Applications

open access: yesSensors, 2023
Small, low-power, and inexpensive marine depth sensors are of interest for a myriad of applications from maritime security to environmental monitoring. Recently, laser-induced graphene (LIG) piezoresistive pressure sensors have been proposed given their ...
Tessa Van Volkenburg   +4 more
doaj   +1 more source

Direct laser writing for nanoporous liquid core laser sensors [PDF]

open access: yesOptics Express, 2012
We report the fabrication of nanoporous liquid core lasers via direct laser writing based on two-photon absorption in combination with thiolene-chemistry. As gain medium Rhodamine 6G was embedded in the nanoporous polybutadiene matrix. The lasing devices with thresholds of 19 µJ/mm(2) were measured to have bulk refractive index sensitivities of 169 nm ...
Grossmann, Tobias   +5 more
openaire   +4 more sources

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Micro-machining Techniques for the Fabrication of Fibre Fabry-Perot Sensors [PDF]

open access: yes, 2006
Fabry-Perot optical fibre sensors have been used extensively for measuring a variety of parameters such as strain, temperature, pressure and vibration. Conventional extrinsic fibre Fabry-Perot sensors are associated with problems such as calibration of ...
Machavaram, V. R.
core  

Longitudinal spatial characterisation of optical fibre erbium distributed feedback laser under the motion of steady magnetic field

open access: yes, 2014
The spatial sensitivity of an erbium doped optical fibre distributed feedback (DFB) laser to an external magnetic field is reported. Intrinsic birefringence of the laser cavity allows lasing in two orthogonal modes.
Yuan Yao   +3 more
core   +1 more source

Study of QCL Laser Sources for the Realization of Advanced Sensors

open access: yesSensors, 2015
We study the nonlinear dynamics of a quantum cascade laser (QCL) with a strong reinjection provided by the feedback from two external targets in a double cavity configuration.
Giuseppe de Risi   +2 more
doaj   +1 more source

Effect of Ambient Environment on Laser Reduction of Graphene Oxide for Applications in Electrochemical Sensing

open access: yesSensors, 2023
Electrochemical sensors play an important role in a variety of applications. With the potential for enhanced performance, much of the focus has been on developing nanomaterials, in particular graphene, for such sensors.
Abdullah A. Faqihi   +3 more
doaj   +1 more source

PARK(ing) time–How park deficiency affects the biological clock in a Drosophila model of Parkinson's disease

open access: yesFEBS Letters, EarlyView.
Drosophila park mutants serve as a model for Parkinson's disease. We used this strain to investigate the connection between oxidative stress and the circadian clock mechanism. We showed that increased oxidative stress affects the physiology of pacemaker cells, disrupting their daily structural plasticity. Lack of rhythmic signaling from pacemaker cells
Kamila Zientara   +3 more
wiley   +1 more source

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