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Observations of the high-mass star forming region AFGL 2591 reveal a large abundance of CO+, a molecule known to be enhanced by far UV (FUV) and X-ray irradiation. In chemical models assuming a spherically symmetric envelope, the volume of…

Solar and Stellar Astrophysics · Physics 2009-07-22 Simon Bruderer , Arnold O. Benz , Steven D. Doty , Ewine F. van Dishoeck , Tyler L. Bourke

The thickness of the lubricating film plays a vital role in the operational efficiency and reliability of rolling bearings. Ultrasonic reflection techniques offer a promising non-invasive approach for in situ evaluation of lubricant…

Instrumentation and Detectors · Physics 2025-07-01 Pan Dou , Yayu Li , Suhaib Ardah , Tonghai Wu , Min Yu , Tom Reddyhoff , Yaguo Lei , Daniele Dini

Ultraviolet absorption line spectroscopy is a sensitive diagnostic for the properties of interstellar and circumgalactic gas. Down-the-barrel observations, where the absorption is measured against the galaxy itself, are commonly used to…

Ultraviolet (UV) imagers are important for a variety of applications, such as quality inspection in the semiconductor industry, forensics and food quality inspection, but are often costly because they require dedicated semiconductor process…

Instrumentation and Detectors · Physics 2026-01-05 Suman Kundu , Tao Shen , Kai Betlem , Murali K Ghatkesar , Peter G Steeneken , Frans P Widdershoven

To understand its evolution and the effects of its eruptive events, the Sun is permanently monitored by multiple satellite missions. The optically-thin emission of the solar plasma and the limited number of viewpoints make it challenging to…

Silicon photomultipliers are regarded as a very promising technology for next-generation, cutting-edge detectors for low-background experiments in particle physics. This work presents systematic reflectivity studies of Silicon…

Instrumentation and Detectors · Physics 2021-09-01 M. Wagenpfeil , T. Ziegler , J. Schneider , A. Fieguth , M. Murra , D. Schulte , L. Althueser , C. Huhmann , C. Weinheimer , T. Michel , G. Anton , G. Adhikari , S. Al Kharusi , E. Angelico , I. J. Arnquist , I. Badhrees , J. Bane , D. Beck , V. Belov , T. Bhatta , A. Bolotnikov , P. A. Breur , J. P. Brodsky , E. Brown , T. Brunner , E. Caden , G. F. Cao , C. Chambers , B. Chana , S. A. Charlebois , D. Chernyak , M. Chiu , B. Cleveland , A. Craycraft , T. Daniels , L. Darroch , A. Der Mesrobian-Kabakian , A. de St Croix , K. Deslandes , R. DeVoe , M. L. Di Vacri , M. J. Dolinski , J. Echevers , M. Elbeltagi , L. Fabris , D. Fairbank , W. Fairbank , J. Farine , S. Ferrara , S. Feyzbakhsh , G. Gallina , P. Gautam , G. Giacomini , C. Gingras , D. Goeldi , A. Gorham , R. Gornea , G. Gratta , E. V. Hansen , C. A. Hardy , K. Harouaka , M. Heffner , E. W. Hoppe , A. House , M. Hughes , A. Iverson , A. Jamil , M. Jewell , A. Karelin , L. J. Kaufman , R. Krücken , A. Kuchenkov , K. S. Kumar , Y. Lan , A. Larson , K. G. Leach , D. S. Leonard , G. Li , S. Li , Z. Li , C. Licciardi , R. Lindsay , R. MacLellan , P. Martel-Dion , N. Massacret , T. McElroy , M. Medina Peregrina , B. Mong , D. C. Moore , K. Murray , J. Nattress , C. R. Natzke , R. J. Newby , F. Nolet , O. Nusair , J. C. Nzobadila Ondze , K. Odgers , A. Odian , J. L. Orrell , G. S. Ortega , I. Ostrovskiy , C. T. Overman , S. Parent , A. Piepke , A. Pocar , J. -F. Pratte , E. Raguzin , G. J. Ramonnye , H. Rasiwala , S. Rescia , F. Retière , C. Richard , M. Richman , J. Ringuette , A. Robinson , T. Rossignol , P. C. Rowson , N. Roy , R. Saldanha , S. Sangiorgio , A. K. Soma , F. Spadoni , V. Stekhanov , T. Stiegler , M. Tarka , S. Thibado , A. Tidball , J. Todd , T. Totev , S. Triambak , R. Tsang , F. Vachon , V. Veeraraghavan , S. Viel , C. Vivo-Vilches , M. Walent , U. Wichoski , M. Worcester , S. X. Wu , Q. Xia , W. Yan , L. Yang , O. Zeldovich

The ultra-violet (UV) high-resolution spectropolarimeter Pollux is being studied in Europe under CNES leadership for the LUVOIR space mission. LUVOIR is a projected 15-m telescope equipped with a suite of instruments proposed to NASA.…

Instrumentation and Methods for Astrophysics · Physics 2019-07-30 Maelle Le Gal , Arturo Lopez Ariste , Coralie Neiner

We derive periodic multilayer absorbers with effective uniaxial properties similar to perfectly matched layers (PML). This approximate representation of PML is based on the effective medium theory and we call it an effective medium PML…

Face presentation attacks have become a major threat to face recognition systems and many countermeasures have been proposed in the past decade. However, most of them are devoted to 2D face presentation attacks, rather than 3D face masks.…

Computer Vision and Pattern Recognition · Computer Science 2019-03-28 Lei Li , Zhaoqiang Xia , Xiaoyue Jiang , Yupeng Ma , Fabio Roli , Xiaoyi Feng

Next generation EUV sources for photolithography use light produced by laser-produced plasmas (LPP) from ablated tin droplets. A major challenge for extending the lifetime of these devices is mitigating damage caused by deposition of tin…

Applied Physics · Physics 2023-08-09 Ben Y. Israeli , Christopher Berg Smiet , Marien Simeni Simeni , Ahmed Diallo

Deep Ultraviolet (DUV) Photolithography is currently used to fabricate mass-scale integrated circuits (ICs). Its high throughput and resolution could benefit large-scale RF MEMS production for the telecommunication market. We present a…

Systems and Control · Electrical Eng. & Systems 2024-07-23 Marco Liffredo , Federico Peretti , Nan Xu , Silvan Stettler , Luis Guillermo Villanueva

Photoevaporation driven by hydrogen-ionizing radiation, also known as extreme-ultraviolet (EUV), profoundly shapes the lives of diverse astrophysical objects. Focusing here mainly on the dispersal of protoplanetary disks, we construct an…

Earth and Planetary Astrophysics · Physics 2024-06-27 Riouhei Nakatani , Neal J. Turner , Shinsuke Takasao

Collective lattice dynamics determine essential aspects of condensed matter, such as elastic and thermal properties. These exhibit strong dependence on the length-scale, reflecting the marked wavevector dependence of lattice excitations.…

Recent advances in the physical vapor deposition (PVD) of protective fluoride films have raised the far-ultraviolet (FUV: 912-1600 {\AA}) reflectivity of aluminum-based mirrors closer to the theoretical limit. The greatest gains, at more…

Instrumentation and Methods for Astrophysics · Physics 2018-01-11 Brian Fleming , Manuel Quijada , John Hennessy , Arika Egan , Javier Del Hoyo , Brian A. Hicks , James Wiley , Nicholas Kruczek , Nicholas Erickson , Kevin France

We present a model for the intensity of optically thin EUV emission for a plasma atmosphere. We apply our model to the solar corona as observed using the six optically thin EUV channels of the SDO/AIA instrument. The emissivity of the…

Solar and Stellar Astrophysics · Physics 2020-03-31 D. J. Pascoe , A. Smyrli , T. Van Doorsselaere

This paper presents a novel method, MaskMVS, to solve depth estimation for unstructured multi-view image-pose pairs. In the plane-sweep procedure, the depth planes are sampled by histogram matching that ensures covering the depth range of…

Computer Vision and Pattern Recognition · Computer Science 2019-04-11 Yuxin Hou , Arno Solin , Juho Kannala

Accurate modeling of ultrasound wave propagation is essential for high-fidelity simulation and imaging in ultrasonic testing. A primary challenge lies in characterizing the excitation source, particularly for transducers with large…

Medical Physics · Physics 2026-03-26 Tim Bürchner , Simon Schmid , Ernst Rank , Stefan Kollmannsberger , Andreas Fichtner

Ultrafast accurate physical layer models are essential for designing, optimizing and managing ultrawideband optical transmission systems. We present a closed-form GN/EGN model based on a recent analytical breakthrough, improving…

Signal Processing · Electrical Eng. & Systems 2025-04-08 Pierluigi Poggiolini , Yanchao Jiang

Frequency-modulation (FM) spectroscopy has been extended to the vacuum-ultraviolet (VUV) range of the electromagnetic spectrum. Coherent VUV laser radiation is produced by resonance-enhanced sum-frequency mixing…

We use Raman spectroscopy to show that exposing few-layer graphene to extreme ultraviolet (EUV, 13.5 nm) radiation, i.e. relatively low photon energy, results in an increasing density of defects. Furthermore, exposure to EUV radiation in a…

Materials Science · Physics 2013-08-27 A. Gao , P. J. Rizo , E. Zoethout , L. Scaccabarozzi , C. J. Lee , V. Banine , F. Bijkerk