cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Sonnenfleckenzeichnung Nr. 2464.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.12.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
MONCE Tracking Metrics: a comprehensive quantitative performance evaluation methodology for object tracking
Creators: name: Rapko, Kenneth
name: Xie, Wanlin
name: Walsh, Andrew
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Evaluating tracking model performance is a complicated task, particularly for non-contiguous, multi-object trackers that are crucial in defense applications. While there are various excellent tracking benchmarks available, this work expands them to quantify the performance of long-term, non-contiguous, multi-object and detection model assisted trackers. We propose a suite of MONCE (Multi-Object Non-Contiguous Entities) image tracking metrics that provide both objective tracking model performance benchmarks as well as diagnostic insight for driving tracking model development in the form of Expected Average Overlap, Short/Long Term Re-Identification, Tracking Recall, Tracking Precision, Longevity, Localization and Absence Prediction.
3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3 II: Hierarchical Star Formation Revealed by Spatial and Kinematic Substructures
Creators: name: Pang, Xiaoying
name: Tang, Shih-Yun
name: Li, Yuqian
name: Yu, Zeqiu
name: Wang, Long
name: Li, Jiayu
name: Li, Yezhang
name: Wang, Yifan
name: Wang, Yanshu
name: Zhang, Teng
name: Pasquato, Mario
name: Kouwenhoven, M. B. N.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We identify members of 65 open clusters in the solar neighborhood using the machine-learning algorithm StarGO based on Gaia EDR3 data. After adding members of twenty clusters from previous studies (Pang et al. 2021a,b; Li et al. 2021) we obtain 85 clusters, and study their morphology and kinematics. We classify the substructures outside the tidal radius into four categories: filamentary (f1) and fractal (f2) for clusters $<100$ Myr, and halo (h) and tidal-tail (t) for clusters $>100$ Myr. The kinematical substructures of f1-type clusters are elongated; these resemble the disrupted cluster Group X. Kinematic tails are distinct in t-type clusters, especially Pleiades. We identify 29 hierarchical groups in four young regions (Alessi 20, IC 348, LP 2373, LP 2442); ten among these are new. The hierarchical groups form filament networks. Two regions (Alessi 20, LP 2373) exhibit global "orthogonal" expansion (stellar motion perpendicular to the filament), which might cause complete dispersal. Infalling-like flows (stellar motion along the filament) are found in UBC 31 and related hierarchical groups in the IC 348 region. Stellar groups in the LP 2442 region (LP 2442 gp 1-5) are spatially well-mixed but kinematically coherent. A merging process might be ongoing in the LP 2442 subgroups. For younger systems ($\lesssim30$ Myr), the mean axis ratio, cluster mass and half-mass radius tend to increase with age values. These correlations between structural parameters may imply two dynamical processes occurring in the hierarchical formation scenario in young stellar groups: (1) filament dissolution and (2) sub-group mergers.
description: Accepted to ApJ, 33 pages, 14 figures. OC 3D interactive visualization included on http://3doc-morphology.lowell.edu
Sonnenfleckenzeichnung Nr. 2366.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.07.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Exploiting Preferences in Loss Functions for Sequential Recommendation via Weak Transitivity
Creators: name: Chung, Hyunsoo
name: Kim, Jungtaek
name: Jo, Hyungeun
name: Choi, Hyungwon
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: A choice of optimization objective is immensely pivotal in the design of a recommender system as it affects the general modeling process of a user's intent from previous interactions. Existing approaches mainly adhere to three categories of loss functions: pairwise, pointwise, and setwise loss functions. Despite their effectiveness, a critical and common drawback of such objectives is viewing the next observed item as a unique positive while considering all remaining items equally negative. Such a binary label assignment is generally limited to assuring a higher recommendation score of the positive item, neglecting potential structures induced by varying preferences between other unobserved items. To alleviate this issue, we propose a novel method that extends original objectives to explicitly leverage the different levels of preferences as relative orders between their scores. Finally, we demonstrate the superior performance of our method compared to baseline objectives.
description: Accepted to CIKM 2024, Short Research Paper Track
Hydraena Kugelann 1794
Creators: name: Perkins, Philip D.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydraenidae
Hydraena

description: Hydraena Kugelann, 1794
Hydraena Kugelann, 1794: 578 (type species Hydraena riparia Kugelann 1794: 579).
The hyperdiverse, cosmopolitan genus Hydraena is well defined by the following autapomorphic morphological characteristics: 1) presence of a labral-mandibular interlocking device (Perkins 1989), 2) mentum with an acute median projection anteriorly (Perkins 1989), 3) various complex sensilla (Perkins 1997), and 4) specialized features of the exocrine secretion delivery system (Perkins 1997). There is general agreement among current workers that Hydraena is monophyletic, based on these morphological characters (for example, Jäch et al. 2000).
description: Published as part of Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), pp. 1-264 in Zootaxa 4342 (1) on pages 15-16, DOI: 10.11646/zootaxa.4342.1.1, http://zenodo.org/record/1041066
ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): How do dense core properties affect the multiplicity of protostars?
Creators: name: Luo, Qiuyi
name: Liu, Tie
name: Tatematsu, Kenichi
name: Liu, ShengYuan
name: Li, Pak Shing
name: di Francesco, James
name: Johnstone, Doug
name: Goldsmith, Paul F.
name: Dutta, Somnath
name: Hirano, Naomi
name: Lee, ChinFei
name: Li, Di
name: Kim, KeeTae
name: Lee, Chang Won
name: Lee, JeongEun
name: Liu, Xunchuan
name: Juvela, Mika
name: He, Jinhua
name: Qin, ShengLi
name: Liu, HongLi
name: Eden, David
name: Kwon, Woojin
name: Sahu, Dipen
name: Li, Shanghuo
name: Xu, FengWei
name: Zhang, Siju
name: Hsu, ShihYing
name: Bronfman, Leonardo
name: Sanhueza, Patricio
name: Pelkonen, VeliMatti
name: Zhou, Jianwen
name: Liu, Rong
name: Gu, Qilao
name: Wu, Yuefang
name: Mai, Xiaofeng
name: Falgarone, Edith
name: Shen, ZhiQiang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: During the transition phase from a prestellar to a protostellar cloud core, one or several protostars can form within a single gas core. The detailed physical processes of this transition, however, still remain unclear. We present 1.3 mm dust continuum and molecular line observations with the Atacama Large Millimeter/submillimeter Array (ALMA) toward 43 protostellar cores in the Orion Molecular Cloud Complex ($λ$ Orionis, Orion B, and Orion A) with an angular resolution of $\sim$ 0.35" ($\sim$ 140 au). In total, we detect 13 binary/multiple systems. We derive an overall multiplicity frequency (MF) of 28$\%$ $\pm$ 4$\%$ and a companion star fraction (CSF) of 51$\%$ $\pm$ 6$\%$, over a separation range of 300-8900 au. The median separation of companions is about 2100 au. The occurrence of stellar multiplicity may depend on the physical characteristics of the dense cores. Notably, those containing binary/multiple systems tend to show higher gas density and Mach number than cores forming single stars. The integral-shaped filament (ISF) of Orion A giant molecular cloud (GMC), which has the highest gas density and hosts high-mass star formation in its central region (the Orion Nebula cluster), shows the highest MF and CSF among the Orion GMCs. In contrast, the $λ$ Orionis Giant Molecular Cloud (GMC) has a lower MF and CSF than the Orion B and Orion A GMCs, indicating that feedback from HII regions may suppress the formation of multiple systems. We also find that the protostars comprising a binary/multiple system are usually at different evolutionary stages.
description: This paper was accepted by APJ. 31 pages and 9 figures
On the stability of low-mass planets with supercritical hydrospheres
Creators: name: Vivien, Hugo
name: Aguichine, Artyom
name: Mousis, Olivier
name: Deleuil, Magali
name: Marcq, Emmanuel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Short-period and low-mass water-rich planets are subject to strong irradiation from their host star, resulting in hydrospheres in supercritical state. In this context, we explore the role of irradiation on small terrestrial planets that are moderately wet in the low-mass regime (0.2--1$M_{\oplus}$). We investigate their bulk properties for water contents in the 0.01--5\% range by making use of an internal structure model that is coupled to an atmosphere model. This coupling allows us to take into account both the compression of the interior due to the weight of the hydrosphere and the possibility of atmospheric instability in the low-mass regime. We show that even for low masses and low water contents, these planets display inflated atmospheres. For extremely low planetary masses and high irradiation temperatures, we find that steam atmospheres become gravitationally unstable when the ratio $η$ of their scale height to planetary radius exceeds a critical value of $\sim 0.1$. This result is supported by observational data, as all currently detected exoplanets exhibit values of $η$ smaller than 0.013. Depending on their water content, our results show that highly irradiated and low-mass planets up to $0.9M_{\oplus}$ with significative hydrospheres are not in stable form and should loose their volatile envelope.
description: Accepted for publication in ApJ
Le tracce del passato e l'impronta del presente. Scritti in memoria di Giovanni Lilliu
Creators: name: Cicilloni, Riccardo
name: Perra, Mauro
Publisher: name: University of Cagliari
Year: 2018

description: Il grande Maestro Giovanni Lilliu, oltre che il più importante Archeologo del secolo scorso, fu anche un vivace intellettuale, attento a numerose tematiche che esulavano anche dall’archeologia, tematiche legate fortemente, però, alla cultura ed alla lingua della sua amata Sardegna. Questa ricchezza di interessi, questo amore per la complessità, è rispecchiata nel presente volume, in cui vari studiosi, soprattutto archeologi ma non solo, hanno voluto non soltanto ricordare il Maestro, ma anche riprendere le tematiche da Lui trattate, spesso approfondendole alla luce delle nuove scoperte e ricerche.
description: Layers. Archeologia Territorio Contesti, Quaderni di Layers 1 - Le tracce del passato e l'impronta del presente. Scritti in memoria di Giovanni Lilliu
Hydraena Dnahydnaedna
Creators: name: Perkins, Philip D.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Hydraenidae
Hydraena

description: Hydraena (Dnahydnaedna), new subgenus
Type species: Hydraena paeminosa Perkins, 1980.
Description. With the following combination of characteristics: Moderately large to large adults (ca. 1.60–1.96 mm), coarsely punctate, elytral punctures random, and habitus characteristic, with pronotum rather elongate. Ventrally, gena with posterior ridge, and mesoventral intercoxal process (P2) tapering to sharp point that is contiguous with a median carina of the metaventrite; male genitalia are usually quite tubular, and have a basic plan similarity; the parameres are characteristic, the left paramere is very small, and located toward the distal end of the main piece, whereas the right paramere has been lost, the paramere setae having their sockets on the main piece. Female gonocoxite "divided," having a weakly sclerotized midlongitudinal area. Spermatheca circular, somewhat disc-shaped. (See figures 3–14, 148, 153– 157 in Perkins 2011)
The six species of the H. paeminosa group are presently included in H. (Dnahydnaedna): H. paeminosa (Guyana, Suriname), H. boliviana (Bolivia), H. xingu (Brazil), H. duohamata (Venezuela), H. punctilata (Brazil), and H. neblina (Venezuela). Additional DNA sequence studies are needed to determine if species in the H. curvosa and H. multispina groups (both South American; see Perkins, 2011) are also members of Dnahydnaedna.
Etymology. Dnahydnaedna is a miscellaneous combination of letters (pronounced dee-nuh-hide-need-nuh). It is dedicated to Ignacio Ribera and Marco Trizzino in recognition of their ongoing contributions to the knowledge of Hydraenidae phylogeny, via DNA sequence analyses.
description: Published as part of Perkins, Philip D., 2017, Hydraenidae of Madagascar (Insecta: Coleoptera), pp. 1-264 in Zootaxa 4342 (1) on pages 16-17, DOI: 10.11646/zootaxa.4342.1.1, http://zenodo.org/record/1041066
Comets in context: Comparing comet compositions with protosolar nebula models
Creators: name: Willacy, Karen
name: Turner, Neal
name: Bonev, Boncho
name: Gibb, Erika
name: Russo, Neil Dello
name: DiSanti, Michael
name: Vervack, Ronald J.
name: Roth, Nathan X.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Comets provide a valuable window into the chemical and physical conditions at the time of their formation in the young solar system. We seek insights into where and when these objects formed by comparing the range of abundances observed for nine molecules and their average values across a sample of 29 comets to the predicted midplane ice abundances from models of the protosolar nebula. Our fiducial model, where ices are inherited from the interstellar medium, can account for the observed mixing ratio ranges of each molecule considered, but no single location or time reproduces the abundances of all molecules simultaneously. This suggests that each comet consists of material processed under a range of conditions. In contrast, a model where the initial composition of disk material is `reset', wiping out any previous chemical history, cannot account for the complete range of abundances observed in comets. Using toy models that combine material processed under different thermal conditions we find that a combination of warm (CO-poor) and cold (CO-rich) material is required to account for both the average properties of the Jupiter-family and Oort cloud comets, and the individual comets we consider. This could occur by the transport (either radial or vertical) of ice-coated dust grains in the early solar system. Comparison of the models to the average Jupiter-family and Oort cloud comet compositions suggest the two families formed in overlapping regions of the disk, in agreement with the findings of A'Hearn et al. (2012) and with the predictions of the Nice model (Gomes et al. 2005, Tsiganis et al. 2005).
description: 32 pages, 8 figures
Sonnenfleckenzeichnung Nr. 2431.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 13.10.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Homonuclear J-Coupling Spectroscopy using J-Synchronized Echo Detection
Creators: name: DeVience, Stephen J.
name: Rosen, Matthew S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In the strong coupling regime with J-coupling much larger than chemical shift differences, J-coupling spectroscopy enables spectral identification of molecules even when conventional NMR fails. While this classically required the presence of a heteronucleus, we recently showed that J-coupling spectra can be acquired in many homonuclear systems using spin-lock induced crossing (SLIC). Here, we present an alternative method using a spin echo train in lieu of a spin-locking SLIC pulse, which has a number of advantages. In particular, spin echo acquisition within the pulse train enables simultaneous collection of time and frequency data. The resulting 2D spectrum can be used to study dynamic spin evolution, and the time domain data can be averaged to create a 1D J-coupling spectrum with increased signal-to-noise ratio.
Leveraging Virtual Reality Simulation to Engage Non-Disabled People in Reflection on Access Barriers for Disabled People
Creators: name: Brogle, Timo
name: Ermoshkin, Andrej Vladimirovic
name: Vakhutinskiy, Konstantin
name: Priewe, Sven
name: Wittig, Claas
name: Meiners, Anna-Lena
name: Gerling, Kathrin
name: Alexandrovsky, Dmitry
Publisher: name: arXiv
Year: 2024
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: H.5

description: Disabled people experience many barriers in daily life, but non-disabled people rarely pause to reflect and engage in joint action to advocate for access. In this demo, we explore the potential of Virtual Reality (VR) to sensitize non-disabled people to barriers in the built environment. We contribute a VR simulation of a major traffic hub in Karlsruhe, Germany, and we employ visual embellishments and animations to showcase barriers and potential removal strategies. Through our work, we seek to engage users in conversation on what kind of environment is accessible to whom, and what equitable participation in society requires. Additionally, we aim to expand the understanding of how VR technology can promote reflection through interactive exploration.
description: Accepted at Mensch und Computer 2024 conference
Sonnenfleckenzeichnung Nr. 2384.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.08.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Multipolar invariants and the eccentricity enhancement function parametrization of gravitational radiation
Creators: name: Bini, Donato
name: Geralico, Andrea
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Gravitational radiation can be decomposed as an infinite sum of radiative multipole moments, which parametrize the waveform at infinity. The multipolar-post-Minkowskian formalism provides a connection between these multipoles and the source multipole moments, known as explicit integrals over the matter source. The gravitational wave energy, angular momentum and linear momentum fluxes are then expressed as multipolar expansions containing certain combinations of the source moments. We compute several gauge-invariant quantities as "building blocks" entering the multipolar expansion of both radiated energy and angular momentum at the 2.5 post-Newtonian (PN) level of accuracy in the case of hyperboliclike motion, by completing previous studies through the calculation of tail effects up to the fractional 1PN order. We express such multipolar invariants in terms of certain eccentricity enhancement factor functions, which are the counterpart of the well known enhancement functions already introduced in the literature for ellipticlike motion. Finally, we use the complete 2.5PN-accurate averaged energy and angular momentum fluxes to study the associated adiabatic evolution of orbital elements under gravitational radiation reaction.
description: 25 pages, revtex macros used
Justicia pilosella Hilsenb.
Creators: name: Daniel, Thomas F.
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Acanthaceae
Justicia
Justicia pilosella

description: Justicia pilosella (Nees) Hilsenb.
 MEXICO. Veracruz: Mpio. Tempoal, 5 km del entronque al Higo dirección alrededores del Ejido San Andrés, 21°49′N, 098°24′W, 20 m, selva baja espinosa, 10-VI-1986 (flr), C . Gutierrez B. & E. Montoya 1834 (MEXU, XAL).
 In addition to its occurrences in the United States (New Mexico, Texas), Daniel (2011) recorded this species from the the following Mexican states: Chihuahua, Coahuila, Durango, Guanajuato, Hidalgo, Nuevo León, Puebla, Querétaro, San Luis Potosí, Tamaulipas, and Zacatecas. The collection noted above extends the distribution of J. pilosella into northwestern Veracruz, ca. 75 km southwest of its known occurrence near Tampico in southern Tamaulipas, and ca. 135 km east of an occurrence in eastern San Luis Potosí.
description: Published as part of Daniel, Thomas F., 2019, New and Reconsidered Mexican Acanthaceae XIII. Justicia, pp. 61-85 in Proceedings of the California Academy of Sciences 66 (3) on page 83, DOI: 10.5281/zenodo.13157250
Time dependent numerical model for the very high energy emissions of distant gamma-ray busrt GRB 201216C
Creators: name: Huang, Yan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recently, the MAGIC Collaboration reported a $\sim 5σ$ statistical significance of the very-high-energy (VHE) emission from a distant GRB, GRB 201216C. Such distant GRB may be effectively absorbed by the extragalactic background light (EBL). The origin of the VHE emission from such distant objects is still unknown. Here, we propose a numerical model for studying the afterglow emission of this distant GRB. The model solves the continuity equation governing the temporal evolution of electron distribution, and the broad-band observed data can be explained by the synchrotron plus synchrotron self-Compton (SSC) radiation of the forward shock. The predicted observed 0.1 TeV flux can reach $\sim 10^{-9} -10^{-10}\rm erg ~ cm^{-2} ~ s^{-1}$ at $t \sim 10^3 -10^4 \rm s$, even with strong EBL absorption, such strong Sub-TeV emissions still can be observed by MAGIC telescope. Using this numerical model, the shock parameters in the modeling are similar with two other Sub-TeV GRBs (i.e., GRB 190114C and GRB 180720B), implying that the Sub-TeV GRBs have some commonalities: they have energetic burst energy, low circum-burst medium density and low magnetic equipartition factor. We regard GRB 201216C as a typical GRB, and estimate the maximum redshift of GRB that can be detected by MAGIC telescope, i.e., $z \sim 1.6$. We also find that the VHE photon energy of such distant GRB can only reach $\sim 0.1 ~\rm TeV$. Improving the low energy sensitivity of the VHE telescope is very important to detect the Sub-TeV emissions of these distant GRBs.
description: 10 pages, 5 figures, submitted to ApJ
Sonnenfleckenzeichnung Nr. 2392.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.08.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 2440.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 29.10.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 2327.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.06.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 2466.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.12.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Feigin-Odesskii brackets, syzygies, and Cremona transformations
Creators: name: Polishchuk, Alexander
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics

description: We identify Feigin-Odesskii brackets $q_{n,1}(C)$, associated with a normal elliptic curve of degree $n$, $C\subset {\mathbb P}^{n-1}$, with the skew-symmetric $n\times n$ matrix of quadratic forms introduced by Fisher in arXiv:1510.04327 in connection with some minimal free resolutions related to the secant varieties of $C$. On the other hand, we show that for odd $n$, the generators of the ideal of the secant variety of $C$ of codimension $3$ give a Cremona transformation of ${\mathbb P}^{n-1}$, generalizing the quadro-cubic Cremona transformation of ${\mathbb P}^4$. We identify this transformation with the one considered in arXiv:alg-geom/9712022 and find explict formulas for the inverse transformation. We also find polynomial formulas for Cremona transformations from arXiv:alg-geom/9712022 associated with higher rank bundles on $C$.
description: 10 pages; v2: 12 pages, added Theorem D on Cremona transformations associated with higher rank bundles
Sonnenfleckenzeichnung Nr. 2458.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 10.12.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
High resolution X-ray study of supernova remnant J0453.6$-$6829 with unusually high forbidden-to-resonance ratio
Creators: name: Koshiba, Yosuke
name: Uchida, Hiroyuki
name: Tanaka, Takaaki
name: Amano, Yuki
name: Sano, Hidetoshi
name: Tsuru, Takeshi Go
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent high-resolution X-ray spectroscopy has revealed that several supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) show unusually high forbidden-to-resonance ($f/r$) line ratios. While their origin is still uncertain and debated, most of these SNRs have asymmetric morphology and/or show evidence of interaction with dense material, which may hint at the true nature of the anomalous $f/r$ ratios. Here we report on a detailed spectral analysis of an LMC SNR J0453.6$-$6829 with the Reflection Grating Spectrometer (RGS) onboard XMM-Newton. We find that the $f/r$ ratio of O$~$VII ($=1.06^{+0.09}_{-0.10}$) is significantly higher than expected from the previously-reported thermal model. The spectrum is fairly explained by taking into account a charge exchange (CX) emission in addition to the thermal component. Analyzing archival ATCA & Parkes radio data, we also reveal that H$~$I cloud is possibly interacting with J0453.6$-$6829. These results support the presence of CX in J0453.6$-$6829, as the origin of the obtained high $f/r$ ratio. Although a contribution of the resonance scattering (RS) cannot be ruled out at this time, we conclude that CX seems more likely than RS considering the relatively symmetric morphology of this remnant.
description: 10 pages, 10 figures, 3 tables, accepted for publication in PASJ
Phaulopsis micrantha C. B. Clarke
Creators: name: Daniel, Thomas F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Acanthaceae
Phaulopsis
Phaulopsis micrantha

description: Phaulopsis micrantha (Benth.) C.B. Clarke
 Príncipe: N end of island, from cacao plantation along road 1.6 (air) km S of Bom Bom Island (01°40.897ʹN, 007°24.115ʹE, 65 m) to mouth of Água Grande at S end of Praia Bom Bom (01°41.390ʹN, 007°23.932ʹE, sea level), plantation grounds and moist lowland evergreen forest, 18 IV 2013 (flr), T. Daniel & J. Shevock 11988 (CAS).
 Although known from several collections on São Tomé (Fig. 2; Daniel and Figueiredo 2009), the one cited above is the first report of the species on Príncipe where it is presumed to be native. It was collected at the same disturbed site as several other Acanthaceae that can become weedy: Brillantaisia lamium (Daniel & Shevock 11990), B. owariensis (Daniel & Shevock 11992), Dicliptera verticillata (Daniel & Shevock 11993), Elytraria marginata Vahl (Daniel & Shevock 11989), and Nelsonia canescens (Lam.) Spreng. (Daniel & Shevock 11991). Elsewhere among the islands of the Gulf of Guinea, P. micrantha also occurs on Annobón (Manktelow 1996; Velayos et al. 2013a). Two other species of the genus, P. angolana S. Moore and P. ciliata (Willd.) Hepper have been recorded on Bioko (Manktelow 1996).
description: Published as part of Daniel, Thomas F., 2020, Notes on the Vascular Flora of the Island of Príncipe (São Tomé and Príncipe) in the Gulf of Guinea, pp. 341-352 in Proceedings of the California Academy of Sciences 66 (15) on page 346, DOI: 10.5281/zenodo.13157426
Sonnenfleckenzeichnung Nr. 2421.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.09.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
APOGEE-2S Mg-Al anti-correlation of the Metal-Poor Globular Cluster NGC 2298
Creators: name: Baeza, Ian
name: Fernández-Trincado, José G.
name: Villanova, Sandro
name: Geisler, Doug
name: Minniti, Dante
name: Garro, Elisa R.
name: Barbuy, Beatriz
name: Beers, Timothy C.
name: Lane, Richard R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present detailed elemental abundances and radial velocities of stars in the metal-poor globular cluster (GC) NGC 2298, based on near-infrared high-resolution ($R\sim$ 22,500) spectra of twelve members obtained during the second phase of the Apache Point Observatory Galactic Evolution Experiment (APOGEE-2) at Las Campanas Observatory as part of the seventeenth Data Release (DR 17) of the Sloan Digital Sky Survey IV (SDSS-IV). We employ the Brussels Automatic Code for Characterizing High accuracy Spectra (\texttt{BACCHUS}) software to investigate abundances for a variety of species including $α$-elements (Mg, Si, and Ca), the odd-Z element Al, and iron-peak elements (Fe and Ni) located in the innermost regions of NGC 2298. We find a mean and median metallicity [Fe/H] $ = -1.76$ and $-1.75$, respectively, with a star-to-star spread of 0.14 dex, compatible with the internal measurement errors. Thus, we find no evidence for an intrinsic Fe abundance spread in NGC 2298. The typical $α-$element enrichment in NGC 2298 is overabundant relative to the Sun, and follows the trend of other metal-poor GCs. We confirm the existence of an Al-enhanced population in this cluster, which is clearly anti-correlated with Mg, indicating the prevalence of the multiple-population phenomenon in NGC 2298.
description: Accepted to Astronomy & Astrophysics. 9 pages, 5 figures, 1 table
Sonnenfleckenzeichnung Nr. 2465.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 23.12.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Discovery of 34 low-mass comoving systems using NOIRLab Source Catalog DR2
Creators: name: Kiwy, Frank
name: Faherty, Jacqueline K.
name: Meisner, Aaron
name: Schneider, Adam C.
name: Kirkpatrick, J. Davy
name: Kuchner, Marc J.
name: Burgasser, Adam J.
name: Casewell, Sarah
name: Kiman, Rocio
name: Calamari, Emily
name: Aganze, Christian
name: Hsu, Chih-Chun
name: Sainio, Arttu
name: Thakur, Vinod
name: Worlds, The Backyard
name: :
name: Collaboration, Planet 9
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the discovery of 34 comoving systems containing an ultra-cool dwarf found by means of the NOIRLab Source Catalog (NSC) DR2. NSC's angular resolution of $\sim$1" allows for the detection of small separation binaries with significant proper motions. We used the catalog's accurate proper motion measurements to identify the companions by cross-matching a previously compiled list of brown dwarf candidates with NSC DR2. The comoving pairs consist of either a very low-mass star and an ultra-cool companion, or a white dwarf and an ultra-cool companion. The estimated spectral types of the primaries are in the K and M dwarf regimes, those of the secondaries in the M, L and T dwarf regimes. We calculated angular separations between $\sim$2 and $\sim$56", parallactic distances between $\sim$43 and $\sim$261 pc and projected physical separations between $\sim$169 and $\sim$8487 AU. The lowest measured total proper motion is 97 mas yr$^{-1}$, the highest 314 mas yr$^{-1}$. Tangential velocities range from $\sim$23 to $\sim$187 km s$^{-1}$. We also determined comoving probabilities, estimated mass ratios and calculated binding energies for each system. We found no indication of possible binarity for any component of the 34 systems in the published literature. The discovered systems can contribute to the further study of the formation and evolution of low-mass systems as well as to the characterization of cool substellar objects.
description: Accepted for publication in The Astronomical Journal
Stenandriopsis thomensis Heine
Creators: name: Daniel, Thomas F.
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Acanthaceae
Stenandriopsis
Stenandriopsis thomensis

description: Stenandriopsis thomensis (Milne-Redh.) Heine
 Príncipe: Obo Natl. Park-Príncipe, trail from ruins of Francisco Mantero (Maria Correia) to Pico Mesa, from 1.5 km (air) SE of ruins (01°35.317ʹN, 007°21.483ʹE, 350 m, lowland to montane rain forest) to summit of Pico Mesa (01°34.930ʹN, 007°21.201ʹE, 500 m, dwarf cloud forest), 19 IV 2013 (old inflorescences), T . Daniel et al. 11995 (CAS).
 Several sterile plants and others bearing inflorescences lacking corollas were locally frequent under the forest canopy about two-thirds of the way up the prominent mesa in southwestern Príncipe. Although Stenandriopsis thomensis has been collected numerous times from several sites on São Tomé, this collection appears to represent only the second collection of the species on Príncipe (Daniel and Figueiredo 2009). It was previously collected on that island at Pico Papagaio (01°36ʹ45ʺN, 007°23ʹ30ʺE; i.e., F. de Oliveira 547 at BRLU and STPH), some 5 km to the northeast. The species also occurs in Cameroon and Nigeria on mainland Africa (Vollesen 1992; Daniel and Figueiredo 2009), but it has not been reported from either Bioko or Annobón in the Gulf of Guinea. Although two other species of the genus occur on Bioko, this is the only species of Stenandriopsis in São Tomé and Príncipe.
description: Published as part of Daniel, Thomas F., 2020, Notes on the Vascular Flora of the Island of Príncipe (São Tomé and Príncipe) in the Gulf of Guinea, pp. 341-352 in Proceedings of the California Academy of Sciences 66 (15) on page 348, DOI: 10.5281/zenodo.13157426
Probing for the host galaxies of the fast X-ray transients XRT 000519 and XRT 110103
Creators: name: Eappachen, D.
name: Jonker, P. G.
name: Fraser, M.
name: Torres, M. A. P.
name: Dhillon, V. S.
name: Marsh, T.
name: Littlefair, S. P.
name: Quirola-Vasquez, J.
name: Maguire, K.
name: Sanchez, D. Mata
name: Cannizzaro, G.
name: Kostrzewa-Rutkowska, Z.
name: Wevers, T.
name: Onori, F.
name: Inkenhaag, Anne
name: Brennan, S. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Over the past few years, $\sim$30 extragalactic fast X-ray transients (FXRTs) have been discovered, mainly in Chandra and XMM-Newton data. Their nature remains unclear, with proposed origins including a double neutron star merger, a tidal disruption event involving an intermediate-mass black hole and a white dwarf, or a supernova shock breakout. A decisive differentiation between these three promising mechanisms for their origin requires an understanding of the FXRT energetics, environments, and/or host properties. We present optical observations obtained with the Very Large Telescope for the FXRTs XRT 000519 and XRT 110103 and Gran Telescopio Canarias observations for XRT 000519 designed to search for host galaxies of these FXRTs. In the $g_s$, $r_s$ and $R$-band images, we detect an extended source on the North-West side of the $\sim$ $1^{\prime\prime}$ (68% confidence) error circle of the X-ray position of XRT 000519 with a Kron magnitude of $g_s=$26.29$\pm$0.09 (AB magnitude). We discuss the XRT 000519 association with the probable host candidate for various possible distances, and we conclude that if XRT 000519 is associated with the host candidate a supernova shock breakout scenario is likely excluded. No host galaxy is found near XRT 110103 down to a limiting magnitude of $R>25.8$.
description: 11 pages, 11 figures, submitted to MNRAS
Sonnenfleckenzeichnung Nr. 2428.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.10.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Backflow in relativistic wave equations
Creators: name: Bialynicki-Birula, Iwo
name: Bialynicka-Birula, Zofia
name: Augustynowicz, Szymon
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Physics (physics.class-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that, contrary to the statements made by many authors, the backflow is not a nonclassical effect. The backflow is a characteristic feature of solutions of the wave equations: quantum and classical. We present simple solutions of the Dirac equation, Maxwell equations and equations of linearized gravity where the backflow phenomenon is clearly seen. In this work we describe backflow in relativistic theories but this phenomenon can occur in the solutions of all kinds of wave equations: quantum and classical.
description: Submitted to Journal of Physics A
Sonnenfleckenzeichnung Nr. 2348.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.06.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Sonnenfleckenzeichnung Nr. 2362.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 10.07.1897, erstellt von Alfred Wolfer
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1897

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zugeordnete numerische Werte wurden in einer separat geführten, chronologischen Tabelle erfasst. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek