Results 51 to 60 of about 84,369 (338)

Pump and probe spectroscopy with continuous wave quantum cascade lasers

The Journal of Chemical Physics, 2014
This paper details infra-red pump and probe studies on nitric oxide conducted with two continuous wave quantum cascade lasers both operating around 5 μm. The pump laser prepares a velocity selected population in a chosen rotational quantum state of the v = 1 level which is subsequently probed using a second laser tuned to a rotational transition within
Kirkbride, J, Causier, S, Dalton, A, Weidmann, D, Ritchie, G   +4 more
openaire   +2 more sources

Molecular spectroscopy with a multimode THz quantum-cascade laser

, 2011
A terahertz absorption spectrometer for highresolution molecular spectroscopy is realized. The spectrometer is based on a multimode quantum-cascade laser. The design and performance of the spectrometer are presented.
A. D. Semenov, H.-W. Hubers, H. Richter, Eichholz, Rene, M. Giehler, Schrottke, L., Pavlov, Sergey, S. G. Pavlov, Wienold, M., Semenov, A. D., Richter, Heiko, Grahn, H. T., Giehler, M., Hübers, Heinz-Wilhelm, R. Eichholz, Hey, R., M. Wienold, L. Schrottke, H. T. Grahn, R. Hey   +19 more
core   +1 more source

Artificial dielectric devices for variable polarization compensation at millimeter and submillimeter wavelengths [PDF]

, 2003
Variable polarization compensation has been demonstrated at 100 GHz. The device consists of two interlocking V-groove artificial dielectric gratings that produce a birefringence that varies with the separation distance. A maximum retardance of 74/spl deg/
Blaikie, R.J., Drysdale, T.D., Richard J. Blaikie, Cumming, D.R.S., Harold M. H. Chong, David R. S. Cumming, Chong, H.M.H., Timothy D. Drysdale   +7 more
core   +1 more source

Rheumatoid Arthritis and Coronary Artery Calcium Progression: A Case Cohort Analysis From ELSA‐Brasil

Arthritis Care &Research, EarlyView.
Objective To investigate the association between rheumatoid arthritis (RA) and coronary artery calcium (CAC) prevalence, incidence, and progression over four years in adults without prior cardiovascular disease. Methods A case‐cohort study within the Brazilian Longitudinal Study of Adult Health (ELSA‐Brasil) included 585 participants (86 patients with ...
Patrícia Fonseca Estrada, Marcos Rafael N. Cavalcante, Itamar de Souza Santos, Márcio S. Bittencourt, Vandrize Meneghini, Paulo A. Lotufo, Alessandra C. Goulart, Isabela M. Bensenor   +7 more
wiley   +1 more source

Local Field Enhancement Due to the Edge States of Nanoplasmonic Crystal

Photonics, 2023
In this paper, we describe the effect of local electric field enhancement due to the existence of photonic edge states in a nanoplasmonic crystal. These states can be excited by a normal incident wave and are localized along the continuous line defect ...
Behrokh Beiranvand, Rustam A. Khabibullin, Alexander S. Sobolev   +2 more
doaj   +1 more source

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

Advanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov, Oleksandr Bobukh, Christian Klose, Florian Nürnberger, Hans Jürgen Maier   +4 more
wiley   +1 more source

NMR spectroscopy using Rabi modulated continuous wave excitation

Biomedical Signal Processing and Control, 2017
We present a proof of principle method to reconstruct nuclear magnetic resonance spectra after perturbing the spin system with a series of Rabi modulated continuous wave excitations. This continuous wave method provides an exciting alternative to pulsed Fourier transform methods which dominate magnetic resonance techniques.
James C. Korte, Kelvin J. Layton, Bahman Tahayori, Peter Mark Farrell, Stephen M. Moore, Leigh A. Johnston   +5 more
openaire   +2 more sources

Effects of Assuming Constant Optical Scattering on Haemoglobin Concentration Measurements Using NIRS during a Valsalva Manoeuvre

, 2011
Resolving for changes in concentration of tissue chromophores in the human adult brain with near-infrared spectroscopy has generally been based on the assumption that optical scattering and pathlength remain constant.
Cooper, CE, Cooper, Chris E, Marcus Gramer, Kohl-Bareis, Matthias, Terence S. Leung, Lei Gao, Gramer, Marcus, Leung, Terence S, Gao, L, Tachtsidis, I, Gao, Lei, Tachtsidis, Ilias, ElwellElwell, Clare E, Chris E. Cooper, Kohl-Bareis, M, Gramer, M, Elwell, CE, Clare E. ElwellElwell, Matthias Kohl-Bareis, Ilias Tachtsidis, Leung, TS   +20 more
core   +1 more source

Enhanced Strength and Corrosion Resistance of Ti‐13Nb‐12Ta‐10Zr‐4Sn Alloy by Aging Treatment

Advanced Engineering Materials, EarlyView.
This work systematically investigates the effect of aging treatment on mechanical properties and corrosion behavior of vacuum arc‐melted Ti‐13Nb‐12Ta‐10Zr‐4Sn alloy. Owing to the increased α″ martensite, strength and corrosion resistance were significantly enhanced by aging treatment.
Yuhua Li, Rong Zhao, Qian Zhang, Haojie Wang, Yujing Liu, Lai‐Chang Zhang   +5 more
wiley   +1 more source

Application of terahertz spectroscopy to the characterization of biological samples using birefringence silicon grating [PDF]

, 2012
We present a device and method for performing vector transmission spectroscopy on biological specimens at terahertz (THz) frequencies. The device consists of artificial dielectric birefringence obtained from silicon microfluidic grating structures. The
Saha, S.C., Khalid, A., Grant, J.P., Cumming, D.   +3 more
core   +1 more source