1. Gas sensing system based on an all-fiber photothermal microcellMatej Njegovec, Jure Javornik, Simon Pevec, Vedran Budinski, Tomaž Gregorec, Benjamin Lang, Manuel Tanzer, Alexander Bergmann, Denis Đonlagić, 2024, izvirni znanstveni članek Opis: This article presents an all-fiber, miniature Fabry-Perot gas sensor based on photothermal absorption spectroscopy with a custom-made and cost-efficient interrogation system. The sensing gas microcell has a diameter of 125 μ m and a length of 1 mm, and allows for free gas exchange within the optical resonator through micromachined slits. High light intensity and confinement are ensured by delivering the excitation light directly into the gas microcell through a lead-in single-mode fiber. This enhances the photothermal effect and provides a short system response time. The interrogation system utilizes the modulation of an excitation laser diode with a fixed frequency while locking the probe laser onto the gas microcell’s quadrature point (QP) and observing the variations of the reflected optical power. To show the potential of the proposed system, nitrogen dioxide (NO2 was measured in dry air. Thereby, a limit of detection of 20 ppm could be achieved for 10 s integration time. Furthermore, the small dimensions of the sensor allow for improved dynamic performance with photothermal modulation frequencies as high as 7 kHz.
Ključne besede: Fabry–Perot interferometer, FPI, fiber gas cell, fiber gas sensor, nitrogen dioxide, NO2, photothermal effect
Objavljeno v DKUM: 29.08.2024; Ogledov: 96; Prenosov: 10
 Celotno besedilo (15,77 MB) |
2. Photothermal gas sensing with a custom-made, fiber-coupled Fabry–Pérot etalonManuel Tanzer, Benjamin Lang, Matej Njegovec, Vedran Budinski, Simon Pevec, Jure Javornik, Denis Đonlagić, Alexander Bergmann, 2024, izvirni znanstveni članek Ključne besede: photothermal gas, etalon, interferometry, Fabry-Perot
Objavljeno v DKUM: 29.08.2024; Ogledov: 77; Prenosov: 16
Celotno besedilo (2,37 MB) |
3. European first-year university students accept evolution but lack substantial knowledge about it: a standardized European cross-country assessmentPaul Kuschmierz, Anna Beniermann, Alexander Bergmann, Rianne Pinxten, Tuomas Aivelo, Justyna Berniak-Woźny, Gustav Bohlin, Anxela Bugallo-Rodriguez, Pedro Cardia, Bento Filipe Barreiras Pinto Cavadas, Andrej Šorgo, Gregor Torkar, 2021, izvirni znanstveni članek Opis: Investigations of evolution knowledge and acceptance and their relation are central to evolution edu‑
cation research. Ambiguous results in this feld of study demonstrate a variety of measuring issues, for instance difer‑
ently theorized constructs, or a lack of standardized methods, especially for cross-country comparisons. In particular,
meaningful comparisons across European countries, with their varying cultural backgrounds and education systems,
are rare, often include only few countries, and lack standardization. To address these defcits, we conducted a stand‑
ardized European survey, on 9200 frst-year university students in 26 European countries utilizing a validated, com‑
prehensive questionnaire, the “Evolution Education Questionnaire”, to assess evolution acceptance and knowledge, as
well as infuencing factors on evolution acceptance.
Ključne besede: evolucija, znanje, visokošolsko izobraževanje, ocenjevanje, Evropa, evolution, acceptance, knowledge, multilevel modeling, socioscientific issues, religious faith, higher education, Europe, assessment, attitude
Objavljeno v DKUM: 02.09.2022; Ogledov: 602; Prenosov: 11
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