cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Asclepios Mission III: THIRD ITERATION OF THE STUDENT-LED ANALOG MISSION SIMULATING A HUMAN EXPEDITION TO THE LUNAR SOUTH POLE
Creators: name:  ANNE-HERMINE ALLAIN
name:   ELENA LOPEZ-CONTRERAS
name:   EVANDROS THEODOSIOU
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: ASCLEPIOS
STUDENT
LUNAR
MARTIAN
HABITATS
ANALOGUEASTRONAUT
ANALOGUE
ASTRONAUT

description: Aerospace Europe Conference 2023 -10th EUCASS -9th CEAS Asclepios Mission III: THIRD ITERATION OF THE STUDENT-LED ANALOG MISSION SIMULATING A HUMAN EXPEDITION TO THE LUNAR SOUTH POLE Europe Conference -10th EUCASS -9th CEAS Evandros Theodosiou*, Elena Lopez-Contreras, Katherine Mulry, Julia Jakiela, Jessica Kehala Studer, Andreia Oliveira, Anne-Hermine Allain, Veronica Orlandi, Loic Lerville-Rouyer, Stavroula Chaloulakou, Diego Gonzalez Asclepios th.evandros@gmail.com*,elenalcontreras@gmail.com, ktb.mulry@gmail.com, J.Jakiela@sms.ed.ac.uk, jess studer@hotmail.com,andreiamlvr@gmail.com,annehermine.allain@gmail.com,veronica.orlandi@univ-tlse3.fr, loic.lervillerouyer@epfl.ch , st.chaloulakou@gmail.com,dagg450@gmail.com
Supplementary document for Broadband background-free vibrational spectroscopy using a mode-locked Cr:ZnS laser - 6072385.pdf
Creators: name: Song, Wenqing
name: Okazaki, Daiki
name: Morichika, Ikki
name: Ashihara, Satoshi
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplemental
Sonnenfleckenzeichnung Nr. 121.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.05.1995, 07:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Architectures of Planetary Systems and Implications for their Formation
Creators: name: Ford, Eric B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Doppler planet searches revealed that many giant planets orbit close to their host star or in highly eccentric orbits. These and subsequent observations inspired new theories of planet formation that invoke gravitation interactions in multiple planet systems to explain the excitation of orbital eccentricities and even short-period giant planets. Recently, NASA's Kepler mission has identified over 300 systems with multiple transiting planet candidates, including many potentially rocky planets. Most of these systems include multiple planets with closely-spaced orbits and sizes between that of Earth and Neptune. These systems represent yet another new and unexpected class of planetary systems and provide an opportunity to test the theories developed to explain the properties of giant exoplanets. Presently, we have limited knowledge about such planetary systems, mostly about their sizes and orbital periods. With the advent of long-term, nearly continuous monitoring by Kepler, the method of transit timing variations (TTVs) has blossomed as a new technique for characterizing the gravitational effects of mutual planetary perturbations for hundreds of planets. TTVs can provide precise (but complex) constraints on planetary masses, densities and orbits, even for planetary systems with faint host stars. In the coming years, astronomers will translate TTV observations into increasingly powerful constraints on the formation and orbital evolution of planetary systems with low-mass planets. Between TTVs, improved Doppler surveys, high-contrast imaging campaigns and microlensing surveys, astronomers can look forward to a much better understanding of planet formation in the coming decade.
description: 6 pages, accepted for publication Proc. Natl. Acad. Sci
Numerical Investigation of the Effects of Structural Property Variability on the Material Response of a Fibrous Ablator
Creators: name:  SEAN MCDANIEL
name:   RUI FU
name:   MATTHEW BECK
name:   ALEXANDRE MARTIN
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: ABLATION
VARIABILITY
STRUCTURAL RESPONSE

description: Ablative materials are often used as thermal protection systems for spacecraft entering an atmosphere. One common material used in this application is a phenolic-impregnated carbon ablator (PICA), which is composed of carbon fibers surrounded by phenolic resin. Due to the orientation of these fibers, the material has large variations of mesoscale properties. This work explores the effects of using distributions of properties rather than effective properties. An orthotropic structural response solver is developed to calculate the displacement and stress field. This developed solver is coupled with an ablation response solver to investigate the effects of property variability applied on Young\'s Modulus on the stress field. This investigation leverages the boundary conditions and iso-Q geometry from ablation workshop test case 3.2 to examine these effects.
Minimising virtual machine support for concurrency
Creators: name: Dobson, Simon
name: Dearle, Alan
name: Porter, Barry
Publisher: name: arXiv
Year: 2013
Subjects: subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: D3.4

description: Co-operative and pre-emptive scheduling are usually considered to be complementary models of threading. In the case of virtual machines, we show that they can be unified using a single concept, the bounded execution of a thread of control, essentially providing a first-class representation of a computation as it is reduced. Furthermore this technique can be used to surface the thread scheduler of a language into the language itself, allowing programs to provide their own schedulers without any additional support in the virtual machine, and allowing the same virtual machine to support different thread models simultaneously and without re-compilation.
description: In Proceedings PLACES 2013, arXiv:1312.2218
Superconducting properties of doped blue phosphorene: Effects of non-adiabatic approach
Creators: name: Alidoosti, Mohammad
name: Esfahani, Davoud Nasr
name: Asgari, Reza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the effects of Kohn anomalies on the superconducting properties in electron- and hole-doped cases of monolayer blue phosphorene, considering both adiabatic and non-adiabatic phonon dispersions using first-principles calculations. We show that the topology of the Fermi surface is crucial for the formation of Kohn anomalies of doped blue phosphorene. By using the anisotropic Eliashberg formalism, we further carefully consider the temperature dependence of the non-adiabatic phonon dispersions. In cases of low hole densities, strong electron-phonon coupling leads to a maximum critical temperature of $T_c=97$ K for superconductivity. In electron-doped regimes, on the other hand, a maximum superconducting critical temperature of $T_c=38$ K is reached at a doping level that includes a Lifshitz transition point. Furthermore, our results indicate that the most prominent component of electron-phonon coupling arises from the coupling between an in-plane (out-of-plane) deformation and in-plane (out-of-plane) electronic states of the electron (hole) type doping.
description: 14 pages, 6 figures; supplementary is available upon request
Sonnenfleckenzeichnung Nr. 261.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.10.1995, 08:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Holographic Bilayer/Monolayer Phase Transitions
Creators: name: Filev, Veselin G.
name: Ihl, Matthias
name: Zoakos, Dimitrios
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the present work, we discuss the phase structure of bilayer and monolayer phases in the (2+1)-dimensional defect field theory whose gravity dual is obtained by embedding D5/anti-D5 probe flavour branes in the singular conifold. We study in detail the embedding equations and compare the free energies of the resulting configurations at non-zero temperature and external magnetic field perpendicular to the defects. Moreover, we analyse the meson spectrum and confirm the stability of the single bilayer solution.
description: 24 pages, 8 figures
Sonnenfleckenzeichnung Nr. 83.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.04.1995, 07:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
TRIAD: a triple patterning lithography aware detailed router
Creators: name: Lin, Yen-Hung
name: Yu, Bei
name: Pan, David Z.
name: Li, Yih-Lang
Publisher: name: arXiv
Year: 2014
Subjects: subject: Hardware Architecture (cs.AR)
subject: FOS: Computer and information sciences

description: TPL-friendly detailed routers require a systematic approach to detect TPL conflicts. However, the complexity of conflict graph (CG) impedes directly detecting TPL conflicts in CG. This work proposes a token graph-embedded conflict graph (TECG) to facilitate the TPL conflict detection while maintaining high coloring-flexibility. We then develop a TPL aware detailed router (TRIAD) by applying TECG to a gridless router with the TPL stitch generation. Compared to a greedy coloring approach, experimental results indicate that TRIAD generates no conflicts and few stitches with shorter wirelength at the cost of 2.41x of runtime.
Sonnenfleckenzeichnung Nr. 212.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 28.08.1995, 07:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Towards A New Class Of Engine For Future Heavy LIft Launch Vehicles
Creators: name:  AMAYA.ESPINOSA@CNES.FR
name:   VINCENT.TAPONIER@CNES.FR
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: HIGH THRUST
STAGED COMBUSTION
HEAVY LIFT
FUTURE LAUNCH VEHICLES

description: The speech of the President of the French Republic at the Space Summit Meeting in February 2022 recalled the European interest for exploration and manned spaceflight. A double observation can be made on this basis: . Ariane 6 is on its way to launch operations, the present studies of future heavy space transportation systems rely on the 120 tons class PROMETHEUS reusable engine, and first stage recovery demonstrations (Callisto and Themis demonstration stages). These launchers (A6 and next step prospects) belong to the class of heavy launchers (max 20T LEO). . The context is moreover evolving, with in the one hand the intensification of the participation in the exploration programs, as well in Earth orbit as in Lunar orbit (and beyond), and in the other hand the fierce competition for commercial access to space. This might lead for Europe to the need of a significant increase in payload capacity, therefore in launch system class as well as propulsion class. Two questions then arise: What type of transportation system (architectures and launch strategies), and what technological steps to prepare this scenario, in particular in the field of Liquid Propulsion, which is a long-term matter? This forward-looking approach resulted in a set of internal studies as well as the performance of a workshop dedicated to European super-heavy launchers prospects and associated technologies, during which the evolutions of the Propulsion Systems were addressed in particular. Several system and engine concept studies have already been started in this way, with the aim of reviewing knowledge and past achievements, then leading to the initiative toward a very-high-thrust engine, possibly with a staged combustion cycle. The objective of this initiative is to prepare the dedicated skills in the French industrial ecosystem and the technologies associated to very high thrust / staged combustion engines, including the benefit of synergies with the existing PROMETHEUS development: engine hardware that can serve as demonstration platform, available test benches for PROMETHEUS and Themis, team competences at ArianeGroup in Vernon. The first phases of the study are already running to identify engine configurations and technological challenges to overcome, and the demonstration elements of a staged combustion cycle engine will be the next objective of this approach to be implemented.
A Pilot Survey of an M Dwarf Flare Star with Swift's UV Grism
Creators: name: Chavali, Shashank
name: Youngblood, Allison
name: Paudel, Rishi R.
name: Loyd, R. O. Parke
name: Molaverdikhani, Karan
name: Pineda, J. Sebastian
name: Barclay, Thomas
name: Vega, Laura D.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The near-ultraviolet (NUV) spectral region is a useful diagnostic for stellar flare physics and assessing the energy environment of young exoplanets, especially as relates to prebiotic chemistry. We conducted a pilot NUV spectroscopic flare survey of the young M dwarf AU Mic with the Neil Gehrels Swift Observatory's UltraViolet and Optical Telescope. We detected four flares and three other epochs of significantly elevated count rates during the 9.6 hours of total exposure time, consistent with a NUV flare rate of $\sim$0.5 hour$^{-1}$. The largest flare we observed released a minimum energy of 6$\times$10$^{33}$ erg between 1730-5000 Å. All flares had durations longer than the $\sim$14-17 minute duration of each Swift visit, making measuring total flare energy and duration infeasible.
description: Published in Research Notes of the AAS (RNAAS)
Sonnenfleckenzeichnung Nr. 33.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.02.1995, 09:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
NuSTAR study of Hard X-Ray Morphology and Spectroscopy of PWN G21.5-0.9
Creators: name: Nynka, Melania
name: Hailey, Charles J.
name: Reynolds, Stephen P.
name: An, Hongjun
name: Baganoff, Frederick K.
name: Boggs, Steven E.
name: Christensen, Finn E.
name: Craig, William W.
name: Gotthelf, Eric V.
name: Grefenstette, Brian W.
name: Harrison, Fiona A.
name: Krivonos, Roman
name: Madsen, Kristin K.
name: Mori, Kaya
name: Perez, Kerstin
name: Stern, Daniel
name: Wik, Daniel R.
name: Zhang, William W.
name: Zoglauer, Andreas
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present NuSTAR high energy X-ray observations of the pulsar wind nebula (PWN)/supernova remnant G21.5-0.9. We detect integrated emission from the nebula up to ~40 keV, and resolve individual spatial features over a broad X-ray band for the first time. The morphology seen by NuSTAR agrees well with that seen by XMM-Newton and Chandra below 10 keV. At high energies NuSTAR clearly detects non-thermal emission up to ~20 keV that extends along the eastern and northern rim of the supernova shell. The broadband images clearly demonstrate that X-ray emission from the North Spur and Eastern Limb results predominantly from non-thermal processes. We detect a break in the spatially integrated X-ray spectrum at ~9 keV that cannot be reproduced by current SED models, implying either a more complex electron injection spectrum or an additional process such as diffusion compared to what has been considered in previous work. We use spatially resolved maps to derive an energy-dependent cooling length scale, $L(E) \propto E^{m}$ with $m = -0.21 \pm 0.01$. We find this to be inconsistent with the model for the morphological evolution with energy described by Kennel & Coroniti (1984). This value, along with the observed steepening in power-law index between radio and X-ray, can be quantitatively explained as an energy-loss spectral break in the simple scaling model of Reynolds (2009), assuming particle advection dominates over diffusion. This interpretation requires a substantial departure from spherical magnetohydrodynamic (MHD), magnetic-flux-conserving outflow, most plausibly in the form of turbulent magnetic-field amplification.
description: 13 pages, 8 figures, 1 table, Accepted for publication in the Astrophysical Journal
Hauke AJP supplement revised
Creators: name: Schultz, Carsten
Publisher: name: figshare
Year: 2020
Subjects: subject: 60602 Animal Physiology - Cell
subject: FOS: Biological sciences
subject: Cell Biology

description: Supplemental material for manuscript by Hauke, Schultz et al., revised version Nov 2020Title: ATP is an Essential Autocrine Factor for Pancreatic β-Cell Signaling and Insulin Secretion
Sonnenfleckenzeichnung Nr. 283.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 25.11.1995, 08:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Natural-Like Technosignatures and Artificial Intelligence
Creators: name: De La Torre, Gabriel G.
Publisher: name: Zenodo
Year: 2023
Subjects: technosignatures
Ceres
Ahuna Mons
Cognitive Bias
Computer Vision
Artificial Intelligence

description: Natural-like technosignatures candidates may represent a detection problem for both artificial systems and humans. We tested traditional computer vision models with natural formations with special characteristics, Ahuna Mons region in Ceres in this particular case. We looked if these artificial models may represent a trustful aid to human detection and identification of potential technosignatures in planetary surfaces. Ahuna Mons is a 4km particular geologic feature on the surface of Ceres of possibly cryovolcanic origin. The special characteristics of Ahuna Mons are also interesting in regard of its surrounding area, especially for the big crater besides. This crater possesses similarities with Ahuna Mons including diameter, age, morphology, etc. Under the cognitive psychology perspective and using current computer vision models we analysed these two features on Ceres for comparison and pattern recognition similarities. Several algorithms were employed avoiding human cognitive bias. 3D analysis from images of both features characteristics are discussed. Results showed positive results for these algorithms about similarities of both features. Discussion is provided about implications of this pilot computer vision techniques experiment for Ahuna Mons and the potential cognitive bias problem of both human and Artificial Intelligence models and the risks for the search of technosignatures.
description: {"references": ["De la Torre, G. G. (2022). Evaluation of Several Computer Vision Feature Detectors/Extractors on Ahuna Mons Region in Ceres and Its Implications for Technosignatures Search.\u00a0Vision,\u00a06(3), 54", "De la Torre, G.G. , & Garcia, M. A. (2018). The cosmic gorilla effect or the problem of undetected non terrestrial intelligent signals. Acta Astronautica, 146, 83-91.", "De la Torre, G.G. (2020). Does artificial intelligence dream of non-terrestrial techno-signatures?. Acta Astronautica, 167,280-285", "Dyson, F. J. (1960) Search for artificial stellar sources of infrared radiation, Science, 131, 1667-1668.", "Kargel, J. S. (1991). Brine volcanism and the interior structures of asteroids and icy satellites. Icarus, 94(2), 368-390.", "Neisser, U. (1979) The control of information pickup in selective looking, in: A.D. Pick (Ed.), Perception and its Development: a Tribute to Eleanor J. Gibson, Lawrence Erlbaum Associates, Hillsdale, New Jersey, pp. 201-219.", "Ruesch, O., Platz, T., Schenk, P., McFadden, L. A., Castillo-Rogez, J. C., Quick, L. C.,... & Russell, C. T. (2016). Cryovolcanism on Ceres. Science, 353(6303).", "Simons, D.J., Chabris, C.F. (1999). Gorillas in our midst: sustained inattentional blindness for dynamic events. Perception 28, 1059-1074", "Simons, D.J. (2010) Monkeying around with the gorillas in our midst: familiarity with an inattentional-blindness task does not improve the detection of unexpected events, i- Perception 1. 3-6."]}
A feasibility study of a future European Single-Stage-To-Orbit (SSTO) spaceplane
Creators: name:  SIMON ALLARDET
name:   CYPRIEN BETHE
name:   EMRYS BOUISSON
name:   ANTOINE HUREAU
name:   BASTIEN LEPREUX
name:   HIPPOLYTE MALLEVAYS
name:   ELWIN SILVESTRI
name:   JULIEN SENON
name:   JULIEN SIMON
name:   HUGO VERJUS
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: SSTO
SPACEPLANE
AIRBREATHING
HYPERSONIC

description: This paper synthesizes the development and feasibility system studies of a horizontal take-off and landing Single Stage To Orbit (SSTO). This medium-sized spaceplane is planned to perform manned flights with 4 crew members or up to 3 tons of payload into Low Earth Orbit (LEO). Thanks to its horizontal take-off and landing, it will be able to operate from any conventional runway. The results of the design iterations for such an aircraft will be presented, considering various sub-studies conducted to inform design choices. This includes the logic and outcomes of the aircraft\'s airframe design, encompassing its external structure, aerodynamic performance, internal structure, layout, and methods for accurate weight estimation. The aircraft being planned to use airbreathing propulsion technologies and having to execute atmospheric re-entries, the trajectory of a mission, its optimization, the aerothermal constraints, and the associated thermal management strategy are taken into consideration. The efficiency of the propulsion system employed plays a critical role in achieving low Earth orbit while maintaining a payload. Thus, from the state of the art and on proposal of innovative concepts, a propulsion system is proposed as well as an estimation of its performances. In order for manned flights to be conducted, they must adhere to multiple safety standards, and it is necessary to characterize the aircraft\'s reusability. Strategies to address these criteria will be developed based on the analysis of risks, reliability, and operational safety. Finally, the designed spacecraft being proposed for the market, it is necessary to approach the place that such a device would have and how such a project could be conducted. We will synthesize the study of the current market, the estimate of the costs of design, implementation, associated maintenance and finally the financial sustainability of such a project.
Simulation of radiation transfer and coherent backscattering in nematic liquid crystals
Creators: name: Aksenova, E. V.
name: Kokorin, D. I.
name: Romanov, V. P.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We consider the multiple scattering of light by fluctuations of the director in a nematic liquid crystal. Using methods of numerical simulation the peak of the coherent backscattering and the coefficients of anisotropic diffusion are calculated. The calculations were carried out without simplifying assumptions on the properties of the liquid crystal. The process of multiple scattering was simulated as a random walk of photons in the medium. We investigated in detail the transition to the diffusion regime. The dependence of the diffusion coefficients on the applied magnetic field and the wavelength of light were studied. The results of simulation showed a non-monotonic dependence of the diffusion coefficients on the external magnetic field. A qualitative explanation of this behaviour was suggested using a simple scalar model. For calculation of the peak of the coherent backscattering we used the semianalytical approach as long as in nematic liquid crystals this peak is extremely narrow. The parameters of backscattering peak and of diffusion coefficients which were found in numerical simulations were compared with the experimental data and the results of analytical calculation.
description: 14 pages, 13 figures
Space System Certification for Human Spaceflight-Historical Practices and New Approaches for Safety
Creators: name:  TIM A. BULK
name:   WILLIAM CLARK
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: HUMAN SPACEFLIGHT
SYSTEM SAFETY
CERTIFICATION

description: With the growth of new space systems for human exploration, including those international partners developing systems for future NASA and commercial missions, many international companies are challenged by the process of space system certification for Human Spaceflight. The process that is currently implemented has worked well from a safety perspective for the last 40 years, but at times is not compatible to commercial development timelines or budgets. The time and costs associated with organizations meeting the regimented and prescriptive safety requirements for an international government funded human exploration program, may be cost prohibitive for a commercial company to participate.
Supplementary document for High-fidelity Image reconstruction in multimode fiber imaging through the MITM-Unet framework - 7347032.pdf
Creators: name: Feng, Zefeng
name: yue, zengqi
name: zhou, wei
name: Xu, Baoteng
name: liu, jialin
name: Sun, Jiawei
name: xiong, daxi
name: Yang, Xibin
Publisher: name: Optica Publishing Group
Year: 2025
Subjects: Photonics, Optoelectronics and Optical Communications

description: The supplementary materials include details of the reconstruction algorithm and the dataset partitioning.
Free boundary problems for a Lotka-Volterra competition system
Creators: name: Wang, Mingxin
name: Zhao, Jingfu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: G.1.8
subject: 35K51, 35R35, 92B05, 35B40

description: In this paper we investigate two free boundary problems for a Lotka-Volterra type competition model in one space dimension. The main objective is to understand the asymptotic behavior of the two competing species spreading via a free boundary. We prove a spreading-vanishing dichotomy, namely the two species either successfully spread to the entire space as time t goes to infinity and survive in the new environment, or they fail to establish and die out in the long run. The long time behavior of the solutions and criteria for spreading and vanishing are also obtained. This paper is an improvement and extension of J. Guo and C. Wu.
description: 19 pages. arXiv admin note: substantial text overlap with arXiv:1301.2063
title: Auslesung und Steuerung eines Oszilloskops mit SCPI-Befehlen über Ethernet unter Verwendung der LXI-Bibliothek
Creators: name: Matekeu Fokwa, Oriane
Publisher: name: Fachhochschule Dortmund
Year: 2023
Subjects: subject: 621.3 Elektrotechnik, Elektronik

description: Die Fernsteuerung und Datenerfassung von Oszilloskopen über Ethernet ist ein relevantes Thema für die Optimierung von Messaufbauten. Das Ziel dieses Projekts besteht darin, eine benutzerfreundliche Anwendung zu entwickeln, die es ermöglicht, ein Oszilloskop über Ethernet anzusteuern und Messdaten abzurufen. Um dieses Ziel zu erreichen, sind mehrere Schritte erforderlich. Zunächst wird eine virtuelle Maschine mit der Linux-Distribution Ubuntu eingerichtet. Anschließend wird die Entwicklungsumgebung Qt Creator installiert. Weiterhin wird die Bibliothek LXI (LAN eXtensions for Instrumentation) [4] installiert. Schließlich werden die Programmiersprache C und die SPCI (Standard Commands for Programmable Instruments [10]) -Befehlsdefinitionen in Qt Creator verwendet, um die gewünschte Aufgabe auszuführen. Der entwickelte Code wird getestet, indem das Oszilloskop über Ethernet mit der virtuellen Maschine verbunden wird. Am Ende dieses Projekts wird es möglich sein, verschiedene Daten eines Referenzsignals automatisch und aus der Ferne zu messen. Dies ermöglicht die flexible Fernsteuerung und Datenabfrage von Oszilloskopen über ein Netzwerk, wodurch eine effiziente Erfassung und Analyse von Messdaten ermöglicht wird.
The Power of Well-Structured Systems
Creators: name: Schmitz, Sylvain
name: Schnoebelen, Philippe
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: Well-structured systems, aka WSTSs, are computational models where the set of possible configurations is equipped with a well-quasi-ordering which is compatible with the transition relation between configurations. This structure supports generic decidability results that are important in verification and several other fields. This paper recalls the basic theory underlying well-structured systems and shows how two classic decision algorithms can be formulated as an exhaustive search for some "bad" sequences. This lets us describe new powerful techniques for the complexity analysis of WSTS algorithms. Recently, these techniques have been successful in precisely characterising the power, in a complexity-theoretical sense, of several important WSTS models like unreliable channel systems, monotonic counter machines, or networks of timed systems.
description: Invited talk
Sonnenfleckenzeichnung Nr. 281.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.11.1995, 08:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Airfoil aerodynamic optimization for Mars exploration aircraft
Creators: name:  ANDREA APROVITOLA
name:   LUIGI IUSPA
name:   GIUSEPPE PEZZELLA
name:   ANTONIO VIVIANI
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: AIRFOIL AERODYNAMIC OPTIMIZATION
LOW REYNOLDS AERODYNAMICS
MARS EXPLORATION AIRCRAFT

description: The red planet has always attracted attention of space scientists for research exploration activities. Currently, researchers are particularly interested in ground surface observation through high resolution images. Apart from the recently involvement of the Mars helicopter Ingenuity, to date, rovers and orbiters represent the principal way to carry out Martian surface exploration. Rovers can be used for very accurate explorations. However, they can operate only over limited areas of the planet, because of their relatively slow and rather difficult movement on surface. On the other hand, orbiters are capable of long-range explorations and cover larger areas, but with low image resolutions. Therefore, the right compromise seems to perform surface exploration by exploiting fixed-wing drones. Mars exploration through aerial drone has been an active area of research for several decades, but Martian low-density atmosphere strongly affect the aerodynamic design of the explorations aircraft. In this framework, the present paper deals with an optimization procedure able to design airfoil for fixed wing aircraft with enhanced aerodynamic performance despite the low Reynold flow conditions. To provide understanding of different Low-Reynolds design two separate airfoil parameterizations are developed and coupled to the Xfoil solver to feed the optimization procedure. A genetic algorithm is adopted to generate the optimal airfoil shape, considering the maximum efficiency as objective of optimization. Finally, the validation of the optimized airfoil is addressed by performing several computational fluid dynamics simulations in flow similarity conditions aimed at defining the airfoil aerodynamic performance.
Sonnenfleckenzeichnung Nr. 140.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 16.06.1995, 07:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Killing tensors, Warped Products and The Orthogonal Separation of The Hamilton-Jacobi Equation
Creators: name: Rajaratnam, Krishan
name: McLenaghan, Raymond G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study Killing tensors in the context of warped products and apply the results to the problem of orthogonal separation of the Hamilton-Jacobi equation. This work is motivated primarily by the case of spaces of constant curvature where warped products are abundant. We first characterize Killing tensors which have a natural algebraic decomposition in warped products. We then apply this result to show how one can obtain the Killing-Stackel space (KS-space) for separable coordinate systems decomposable in warped products. This result in combination with Benenti's theory for constructing the KS-space of certain special separable coordinates can be used to obtain the KS-space for all orthogonal separable coordinates found by Kalnins and Miller in Riemannian spaces of constant curvature. Next we characterize when a natural Hamiltonian is separable in coordinates decomposable in a warped product by showing that the conditions originally given by Benenti can be reduced. Finally we use this characterization and concircular tensors (a special type of torsionless conformal Killing tensor) to develop a general algorithm to determine when a natural Hamiltonian is separable in a special class of separable coordinates which include all orthogonal separable coordinates in spaces of constant curvature.
Sonnenfleckenzeichnung Nr. 79.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.04.1995, 09:45, erstellt von Andrea Manna
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Kalman filters for radio astronomy
Creators: name: Antonietti Nicolò
Publisher: name: Zenodo
Year: 2023
Subjects: Kalman filter, SETI

description: Kalman filters are used, among other applications, to predict a signal from noisy measurements. In this paper, Kalman filters are applied to data collected by radio telescopes. The performance and the outputs are compared to other techniques like Fourier transform analysis, to test their suitability to astronomy applications.
Sonnenfleckenzeichnung Nr. 97.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 26.04.1995, 08:00, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Brittle fracture in a periodic structure with internal potential energy. Spontaneous crack propagation
Creators: name: Ayzenberg-Stepanenko, Mark
name: Mishuris, Gennady
name: Slepyan, Leonid
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences
subject: 74R10, 74H05

description: Spontaneous brittle fracture is studied based on the recently introduced model (Mishuris and Slepyan, Brittle fracture in a periodic structure with internal potential energy. Proc. Roy. Soc. A, in press). A periodic structure is considered, where only the prospective crack-path layer is specified as a discrete set of alternating initially stretched and compressed bonds. A bridged crack destroying initially stretched bonds may propagate under a certain level of the internal energy without external sources. The general analytical solution with the crack speed $-$ energy relation is presented in terms of the crack-related dynamic Green's function. For the anisotropic two-line chain and lattice considered earlier in quasi-statics, the dynamic problem is examined in detail. The crack speed is found to grow unboundedly as the energy approaches its upper limit. It is revealed that the spontaneous fracture can occur in the form of a pure bridged, partially bridged or fully open crack depending on the internal energy level. Generally, the steady-state mode of the crack propagation is found to be realised, whereas an irregular growth, clustering and the crack speed oscillations are detected in a vicinity of the lower bound of the energy.
description: 16 Figures
Sonnenfleckenzeichnung Nr. 38.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.02.1995, 10:30, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 3.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Sonnenfleckenzeichnung Nr. 149.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 25.06.1995, 07:30, erstellt von Michele Bianda
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 2.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)
Bayesian calibration of a finite-rate nitridation model from molecular beam and plasma wind tunnel experiments
Creators: name:  MICHELE CAPRIATI
name:   ANABEL DEL VAL
name:   THOMAS SCHWARTZENTRUBER
name:   TIMOTHY MINTON
name:   PIETRO CONGEDO
name:   THIERRY MAGIN
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: ABLATION
BAYESIAN CALIBRATION
GAS SURFACE INTERACTION

description: The accurate modeling of gas-surface interaction phenomena is crucial for predicting the heat flux and the mass loss experienced by atmospheric entry bodies. Gas-surface interactions refer to the phenomena occurring between the reacting gas and the material. An important part of the modeling is the description of the surface chemical reactions. We propose to stochastically calibrate the rates of the elementary reactions between a nitrogen gas and a carbon surface by using molecular beam data. The parameters\' joint posterior is then propagated through a CFD model to reproduce plasma wind tunnel experiments. The predictive quantities exhibit good agreement with the experimental counterparts.
Spectral gene set enrichment (SGSE)
Creators: name: Frost, H. Robert
name: Li, Zhigang
name: Moore, Jason H.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Genomics (q-bio.GN)
subject: Applications (stat.AP)
subject: FOS: Biological sciences
subject: FOS: Computer and information sciences

description: Motivation: Gene set testing is typically performed in a supervised context to quantify the association between groups of genes and a clinical phenotype. In many cases, however, a gene set-based interpretation of genomic data is desired in the absence of a phenotype variable. Although methods exist for unsupervised gene set testing, they predominantly compute enrichment relative to clusters of the genomic variables with performance strongly dependent on the clustering algorithm and number of clusters. Results: We propose a novel method, spectral gene set enrichment (SGSE), for unsupervised competitive testing of the association between gene sets and empirical data sources. SGSE first computes the statistical association between gene sets and principal components (PCs) using our principal component gene set enrichment (PCGSE) method. The overall statistical association between each gene set and the spectral structure of the data is then computed by combining the PC-level p-values using the weighted Z-method with weights set to the PC variance scaled by Tracey-Widom test p-values. Using simulated data, we show that the SGSE algorithm can accurately recover spectral features from noisy data. To illustrate the utility of our method on real data, we demonstrate the superior performance of the SGSE method relative to standard cluster-based techniques for testing the association between MSigDB gene sets and the variance structure of microarray gene expression data. Availability: http://cran.r-project.org/web/packages/PCGSE/index.html Contact: rob.frost@dartmouth.edu or jason.h.moore@dartmouth.edu
Sonnenfleckenzeichnung Nr. 202.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 18.08.1995, 08:15, erstellt von Sergio Cortesi
Creators: name: Observatorium Specola Solare Ticinese Locarno (1957 bis 1980 Teil der Eidgenössischen Sternwarte der ETH Zürich)
Publisher: name: [s.n.]
Year: 1995

description: Bleistiftzeichnung mit schwarzer Farbe und Bleistift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf einem eigenen Vordruck. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite. Bildqualität (SIDC): 4.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden auf dem Vordruck eingetragen. Zusätzlich sind zuhanden der späteren statistischen Verarbeitung die Angaben für die Bestimmung der Fleckenrelativzahl notiert.
Beobachtungstätigkeit unter eigenständiger Leitung (Associazione Specola Solare Ticinese ASST)