Results 21 to 30 of about 1,084,034 (311)
A Portable Laser Spectroscopic System for Measuring Nitrous Oxide Emissions on Fertilized Cropland
Sensors, 2023 Nitrous oxide (laughing gas, N2O) is a relevant greenhouse gas. Agriculture contributes significantly to its emissions. As nitrogen fertilization has been identified as one of the main sources of N2O, controlled application and reduction of the amount of
Gerrit Stiefvater +5 more
doaj +1 more source
Screen-Printed Sensors for Colorimetric Detection of Hydrogen Sulfide in Ambient Air
Sensors, 2019 A fast and sensitive method to monitor hydrogen sulfide (H2S) in ambient air based on a visible color change of a printed disposable sensor has been developed. As gas-sensitive material, an immobilized copper(II) complex of the azo dye 1-(2-pyridylazo)-2-
Laura Engel +3 more
doaj +1 more source
, 2021 This paper presents a reliable design and measurement methodology of using various feeding networks for mmWave/Sub-THz SoP/SoC/SoD antennas in 5G and 6G communication. In order to achieve reliable and precison testing results, the electrical, mechanical,
CHOI, JAEHYUN +8 more
core
Testing devices under different source impedances: a novel technique for on-line measurement of source and device reflection coefficients [PDF]
, 1999 This paper describes a new approach for fast and accurate determination of the source reflection coefficient in microwave source-pull measurements. To the authors' knowledge, this is the only technique that allows the simultaneous measurement of the ...
A. Ferrero +11 more
core +1 more source
Colorimetric Detection of Hydrogen Sulfide in Ambient Air
Proceedings, 2018 We present a fast method to monitor hydrogen sulfide (H2S) in ambient air based on a visible color change. Therefore, an immobilized copper(II) complex of the azo dye 1-(2-pyridylazo)-2-naphtol (H-PAN) was synthesized and prepared in a matrix for screen ...
Laura Engel +3 more
doaj +1 more source
Group-delay measurement of frequency-converting devices using a comb generator
, 2010 We propose a new method for the measurement of (group) delay from the radio-frequency (RF) input to the intermediate-frequency (IF) output of a mixer or a receiver.
Scott, Jonathan B., Hoy, M.
core +1 more source
APL Photonics, 2019 Interferometric 3D metrology on arbitrarily moving objects is possible if the reference phase is adapted to match the object speed. We show this theoretically for rotation with constant angular velocity and provide experimental results for off-center ...
Annelie Schiller +5 more
doaj +1 more source
High-sensitivity quantum sensing with pump-enhanced spontaneous parametric down-conversion
APL Photonics, 2023 Recent years have seen the development of quantum sensing concepts utilizing nonlinear interferometers based on correlated photon pairs generated by spontaneous parametric down-conversion (SPDC).
Chiara Lindner +5 more
doaj +1 more source
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Central nervous system (CNS) involvement in childhood acute lymphoblastic leukemia (ALL) is assessed by cell counting and cytomorphology from cerebrospinal fluid (CSF) and is used for treatment stratification worldwide. The ratio of “CNS2” patients in clinical trials ranges from 3% to 40%, with unclear prognostic significance ...
Laura Almási +14 more
wiley +1 more source
Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Introduction Pre‐dilution online hemodiafiltration (Pre‐HDF) is predominantly used in Japan, whereas post‐dilution online HDF (Post‐HDF) is more common in Europe. An asymmetric cellulose triacetate (ATA) membrane may improve biocompatibility.
Kenji Sakurai +4 more
wiley +1 more source