Results 91 to 100 of about 36,249 (243)
Remote SensingFourier-transform spectrometers are widely used for spectral measurements. Changes in the field of view during measurement introduce oscillations into the measured spectra known as scene-change artifacts.
Kody A. Wilson +3 more
doaj +1 more source
Mid‐Infrared Spectroscopy and Machine Learning for Chlorogenic Acid Quantification in Coffee
Chemie Ingenieur Technik, Volume 98, Issue 3, Page 85-97, March 2026.Chlorogenic acid (CGA) concentration in coffee was predicted using mid‐infrared (MIR) spectroscopy and a machine learning approach. Forty‐four roasting stages (140–220 °C) plus a green coffee control were analyzed. A multilayer perceptron regressor, trained on preprocessed MIR data, outperformed traditional peak analysis, enabling accurate and ...
Deborah Herdt +6 more
wiley +1 more source
Multipass holographic interferometer improves image resolution [PDF]
, 1970 Multipass holographic interferometer forms a hologram of high diffraction efficiency, and hence provides a bright and high contrast interferogram. It is used to study any effect which changes the index of refraction and to study surface deformations of a
Brooks, R. E., Heflinger, L. O.
core +1 more source
A Fourier transform Raman spectrometer with visible laser excitation
, 2014 We present the development and performance of a Fourier transformation (FT) based Raman spectrometer working with visible laser (532 nm) excitation. It is generally thought that FT-Raman spectrometers are not viable in the visible range where shot-noise ...
Bernáth, B. +7 more
core +1 more source
Factoring numbers with a single interferogram [PDF]
, 2011 We construct an analog computer based on light interference to encode the hyperbolic function f({zeta}){identical_to}1/{zeta} into a sequence of skewed curlicue functions.
V. Tamma +5 more
semanticscholar +1 more source
Infrared Nano‐Spectroscopy of Single Cell Sections at the Ultrastructural Level
Nanophotonics, Volume 15, Issue 6, 27 March 2026.Using nano‐FTIR spectroscopy, we resolve subtle differences in infrared absorption among individual subcellular regions of a human cell line with 50 nm spatial resolution. The multichannel information of nano‐FTIR spectra can provide a basis for detailed biochemical interpretation on the ultrastructural level that complement existing electron ...
Florina Marxer +6 more
wiley +1 more source
ChemistryOpen, Volume 15, Issue 3, March 2026.The study compares hemp, flax, and sisal as nonwood raw materials for pulp production using soda and nitrate‐alkaline cooking. It evaluates chemical composition, cellulose crystallinity, yield, delignification, and paper strength. Sisal showed the highest tensile performance, while the choice of cooking method significantly influenced the quality and ...
Kateřina Hájková +3 more
wiley +1 more source
, 2015 A method to accurately measure the density of Rb vapor is described. We plan on using this method for the Advanced Wakefield (AWAKE)~\cite{bib:awake} project at CERN , which will be the world's first proton driven plasma wakefield experiment.
Batsch, F., Muggli, P., Öz, E.
core +1 more source
Preparation of Activated Carbons From ZIF‐8 Using Cellulose Acetate as an Additional Carbon Source
ChemistrySelect, Volume 11, Issue 9, 5 March 2026.Activated carbons were prepared from a zeolitic imidazolate framework with the addition of cellulose acetate via three different routes for preparation of the pre‐carbonization mixture. The activated carbons were nitrogen‐containing carbons with large surface areas and porosities.
Nwabisa Khethula +2 more
wiley +1 more source
Applied Optics, 2013 A signal-processing method is proposed in the fully interferometric three-dimensional (3D) imaging spectrometry. This processing computes a 3D interferogram, in which recorded fringe patterns do not directly reflect wavefront forms propagated from a ...
T. Hashimoto, A. Hirai, K. Yoshimori
semanticscholar +1 more source