cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Boundary Layers of Accretion Disks: Wave-Driven Transport and Disk Evolution
Creators: name: Coleman, Matthew S. B.
name: Rafikov, Roman R.
name: Philippov, Alexander A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Astrophysical objects possessing a material surface (white dwarfs, young stars, etc.) may accrete gas from the disc through the so-called surface boundary layer (BL), in which the angular velocity of the accreting gas experiences a sharp drop. Acoustic waves excited by the supersonic shear in the BL play an important role in mediating the angular momentum and mass transport through that region. Here we examine the characteristics of the angular momentum transport produced by the different types of wave modes emerging in the inner disc, using the results of a large suite of hydrodynamic simulations of the BLs. We provide a comparative analysis of the transport properties of different modes across the range of relevant disc parameters. In particular, we identify the types of modes which are responsible for the mass accretion onto the central object. We find the correlated perturbations of surface density and radial velocity to provide an important contribution to the mass accretion rate. Although the wave-driven transport is intrinsically non-local, we do observe a clear correlation between the angular momentum flux injected into the disc by the waves and the mass accretion rate through the BL. We find the efficiency of angular momentum transport (normalized by thermal pressure) to be a weak function of the flow Mach number. We also quantify the wave-driven evolution of the inner disc, in particular the modification of the angular frequency profile in the disc. Our results pave the way for understanding wave-mediated transport in future three-dimensional, magnetohydrodynamic studies of the BLs.
description: 16 pages, 9 figures, submitted to MNRAS
Profitability of Low Energy District Heating for Areas with Low Energy Buildings
Creators: name: Inese, Nagla
name: Christensen, Jørgen Erik
name: Weitzmann, Peter
name: Rosa, Alessandro Dalla
Publisher: name: Grøn Dyst 2010
Year: 2010

description: An efficient energy supply systems together with energy conservation in the buildings is a promising concept to reach sustainability in the building sector. Low energy district heating gives new opportunities of utilizing renewable energy. The general topic of the thesis is to develop a proposal of methods to make district heating systems competitive for areas with low energy buildings, from the economical and environmental point of view.
Quantum Gravity on a Manifold with boundaries: Schrödinger Evolution and Constraints
Creators: name: Rosabal, J. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work, we derive the boundary Schrödinger (functional) equation for the wave function of a quantum gravity system on a manifold with boundaries together with a new constraint equation defined on the timelike boundary. From a detailed analysis of the gravity boundary condition on the spatial boundary, we find that while the lapse and the shift functions are independent Lagrange multipliers on the bulk, on the spatial boundary, these two are related; namely, they are not independent. In the Hamiltonian ADM formalism, a new Lagrange multiplier, solving the boundary conditions involving the lapse and the shift functions evaluated on the spatial boundary, is introduced. The classical equation of motion associated with this Lagrange multiplier turns out to be an identity when evaluated on a classical solution of Einstein's equations. On the other hand, its quantum counterpart is a constraint equation involving the gravitational degrees of freedom defined only on the boundary. This constraint has not been taken into account before when studying the quantum gravity Schrödinger evolution on manifolds with boundaries.
description: Published in EPJC
Sonnenfleckenzeichnung Nr. 13145.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 15.10.1935, erstellt von William Otto Brunner
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Wright functions of the second kind and Whittaker functions
Creators: name: Mainardi, Francesco
name: Paris, Richard B.
name: Consiglio, Armando
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Mathematics (math.GM)
subject: FOS: Mathematics
subject: 26A33, 30B10, 30E15, 33C20, 34E05, 41A60

description: In the framework of higher transcendental functions the Wright functions of the second kind have increased their relevance resulting from their applications in probability theory and, in particular, in fractional diffusion processes. Here, these functions are compared with the well-known Whittaker functions in some special cases of fractional order. In addition, we point out two erroneous representations in the literature.
description: 16 pages, 8 figures
Megachile (Pseudomegachile) lanata Fabricius 1775
Creators: name: Sardar, Sayan
name: Warrit, Natapot
name: Rameshkumar, A.
name: Kazmi, S. I.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Megachilidae
Megachile
Megachile lanata

description: 8. Megachile (Pseudomegachile) lanata Fabricius, 1775 (Figure 2i, 2j)
1775. Apis lanata Fabricius, Syst. Entomol.: 385.
Material examined: 01 ♂, India, West Bengal, Hooghly, Dankuni, 05.i.1978, net sweep, coll. A.K. Roy; 01 ♂, India, Assam, Majuli Island, Garamur Satra, 26.9661°N, 94.0707°E, 14.iii.2019, YPT, coll. A. Rameshkumar; 01 ♀, India, Dadra & Nagar Haveli and Daman & Diu, Silvassa circuit house campus, 20.26°N, 72.97°E, 23.i.2018, YPT, coll. A. Rameshkumar.
Distribution: India, Himachal Pradesh, Haryana, Punjab, Gujarat, Rajasthan (Gupta, 1993), Karnataka, Jammu, Kerala, Maharashtra, Tamil Nadu, Uttar Pradesh, Madhya Pradesh (GBIF, 2020c), Uttarakhand (Khan et al., 2016), West Bengal (new record), Assam (new record), Dadra and Nagar Haveli (new record).
Floral associations: Cajanus cajan, Crotalaria juncea, Medicago sativa, Parkinsonia sp., Bauhinia latifolia, Derris pinnata, Pisum sp., Lathyrus odoratum, Doliches lablab (Fabaceae), Grewia asiatica (Malvaceae), Tridax procumbens, Helianthus annuus (Asteraceae), Lagerstroemia indica (Lythraceae), Duranta sp. (Verbenaceae), Jacomentia sp. (Nymphaeaceae), Ipomoea palmatus (Convolvulaceae), Campsis radicans, Tecoma stans (Bignoniaceae), Murraya paniculata (Rutaceae), Vitex negundo (Lamiaceae), Nerium sp. (Apocynaceae), Adhathoda vasica (Acanthaceae), Jacaranda mimosifolia (Bignoniaceae), Justicia thyrsifolius (Acanthaceae), Boerhavia diffusa (Nyctaginaceae) (Gupta, 1993).
Discusssion
The present study reveals the new distributional records of 7 Megachile species in 5 different states and 2 union territories of India. Megachile lanata Fabricius, 1775 is reported for the first time from North Eastern India (Assam) which comprises a major part of the Indo-Burma biodiversity hotspot. Species of Megachile are efficient pollinator of Fabaceae and Lamiaceae and hence can be commercially utilized in agricultural fields as an effective
description: Published as part of Sardar, Sayan, Warrit, Natapot, Rameshkumar, A. & Kazmi, S. I., 2021, New distributional records of Megachile Latreille, 1802 (Apoidea: Megachilidae) from Indian States, pp. 23-29 in Records of the Zoological Survey of India 121 (1) on pages 25-28, DOI: 10.26515/rzsi/v121/i1/2021/154515, http://zenodo.org/record/10913819
Selfish optimization and collective learning in populations
Creators: name: McAvoy, Alex
name: Mori, Yoichiro
name: Plotkin, Joshua B.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: A selfish learner seeks to maximize their own success, disregarding others. When success is measured as payoff in a game played against another learner, mutual selfishness typically fails to produce the optimal outcome for a pair of individuals. However, learners often operate in populations, and each learner may have a limited duration of interaction with any other individual. Here, we compare selfish learning in stable pairs to selfish learning with stochastic encounters in a population. We study gradient-based optimization in repeated games like the prisoner's dilemma, which feature multiple Nash equilibria, many of which are suboptimal. We find that myopic, selfish learning, when distributed in a population via ephemeral encounters, can reverse the dynamics that occur in stable pairs. In particular, when there is flexibility in partner choice, selfish learning in large populations can produce optimal payoffs in repeated social dilemmas. This result holds for the entire population, not just for a small subset of individuals. Furthermore, as the population size grows, the timescale to reach the optimal population payoff remains finite in the number of learning steps per individual. While it is not universally true that interacting with many partners in a population improves outcomes, this form of collective learning achieves optimality for several important classes of social dilemmas. We conclude that naïve learning can be surprisingly effective in populations of individuals navigating conflicts of interest.
description: 33 pages; final version
Sonnenfleckenzeichnung Nr. 13199, einen Zürcher Lückentag ergänzend.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.12.1935, erstellt von Friedrich Buser in der privaten Beobachtungsstation im Prätschli in Arosa
Creators: name: Buser, Friedrich
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der privaten Beobachtungsstation Prätschli in Arosa, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). Instrument: 15-cm-Zeiss-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind tabellarisch notierte Werte, die für Protuberanzen mit rot geschrieben wurden, direkt auf der Fleckenzeichnung vermerkt
description: ETH-Bibliothek
Adversarial attacks on voter model dynamics in complex networks
Creators: name: Chiyomaru, Katsumi
name: Takemoto, Kazuhiro
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: This study investigates adversarial attacks conducted to distort voter model dynamics in complex networks. Specifically, a simple adversarial attack method is proposed to hold the state of opinions of an individual closer to the target state in the voter model dynamics. This indicates that even when one opinion is the majority, the vote outcome can be inverted (i.e., the outcome can lean toward the other opinion) by adding extremely small (hard-to-detect) perturbations strategically generated in social networks. Adversarial attacks are relatively more effective in complex (large and dense) networks. These results indicate that opinion dynamics can be unknowingly distorted.
description: 7 pages, 5 figures
Photo-electro Catalytic Water Splitting over Pure and Modified Iron Oxide Thin Films
Creators: name: Hansen, Martin Hangaard
name: Christensen, Mathias Kjærgaard
name: Dahl, Søren
Publisher: name: Grøn Dyst 2010
Year: 2010

description: Photo-catalysis offers the possibility to utilize solar energy to split water, thereby extracting chemical energy in the form of hydrogen. The general challenge is to synthesize a material with the right electronic and chemical properties for efficiently driving the process, while being sustainable in terms of stability and costs. The focus of this bachelor thesis is photo-electrocatalytic splitting of water on modified iron oxide thin films. Through various surface treatments and modification of thin film compositions, this material has shown that its water splitting properties can be improved.
Existence of nonradial domains for overdetermined and isoperimetric problems in nonconvex cones
Creators: name: Iacopetti, Alessandro
name: Pacella, Filomena
name: Weth, Tobias
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35N25, 49Q10, 53A10, 53A05

description: In this work we address the question of the existence of nonradial domains inside a nonconvex cone for which a mixed boundary overdetermined problem admits a solution. Our approach is variational, and consists in proving the existence of nonradial minimizers, under a volume constraint, of the associated torsional energy functional. In particular we give a condition on the domain $D$ on the sphere spanning the cone which ensures that the spherical sector is not a minimizer. Similar results are obtained for the relative isoperimetric problem in nonconvex cones.
Sonnenfleckenzeichnung Nr. 226.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.09.1973, erstellt von Sergio Cortesi, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1973

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
Phase III Biorefinery_Progeeks
Creators: name: Ramesh, Hemalata
name: Mugabi, James Atwoki
name: Ranc, Kristina
name: Vad, Naleli
name: Schmidt, Jens Ejbye
name: Nielsen, Henrik B.
name: Thomsen, Anna Belinda
Publisher: name: Grøn Dyst 2010
Year: 2010

description: The purpose of the biorefinery is to obtain multiple products which can be used for energy production, in order attain sustainability while also being able to sell energy. The raw material being used is the waste of a Small Town, while the fuels being produced are Bioethanol, Biodiesel and Biogas. The energy requirements of the plant are mainly obtained from the burning of saw dust, lignin and biomass. While, the difference in energy requirements can be bought as in conventional.
On cosmological bias due to the magnification of shear and position samples in modern weak lensing analyses
Creators: name: Duncan, Christopher A. J.
name: Harnois-Déraps, Joachim
name: Miller, Lance
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The magnification of galaxies in modern galaxy surveys induces additional correlations in the cosmic shear, galaxy-galaxy lensing and clustering observables used in modern lensing "3x2pt" analyses, due to sample selection. In this paper, we emulate the magnification contribution to all three observables utilising the SLICS simulations suite, and test the sensitivity of the cosmological model, galaxy bias and redshift distribution calibration to un-modelled magnification in a Stage-IV-like survey using Monte-Carlo sampling. We find that magnification cannot be ignored in any single or combined observable, with magnification inducing $>1σ$ biases in the $w_0-σ_8$ plane, including for cosmic shear and 3x2pt analyses. Significant cosmological biases exist in the 3x2pt and cosmic shear from magnification of the shear sample alone. We show that magnification induces significant biases in the mean of the redshift distribution where a position sample is analysed, which may potentially be used to identify contamination by magnification.
description: 17 pages, 7 figures, 3 tables. Submitted to MNRAS. Comments welcome
Sonnenfleckenzeichnung Nr. 75.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.03.1973, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1973

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
Sonnenfleckenzeichnung Nr. 13184.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.12.1935, erstellt von William Brunner, Assistent
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Excited-state spin-resonance spectroscopy of V$_\text{B}^-$ defect centers in hexagonal boron nitride
Creators: name: Mathur, Nikhil
name: Mukherjee, Arunabh
name: Gao, Xingyu
name: Luo, Jialun
name: McCullian, Brendan A.
name: Li, Tongcang
name: Vamivakas, A. Nick
name: Fuchs, Gregory D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The recently discovered spin-active boron vacancy (V$_\text{B}^-$) defect center in hexagonal boron nitride (hBN) has high contrast optically-detected magnetic resonance (ODMR) at room-temperature, with a spin-triplet ground-state that shows promise as a quantum sensor. Here we report temperature-dependent ODMR spectroscopy to probe spin within the orbital excited-state. Our experiments determine the excited-state spin Hamiltonian, including a room-temperature zero-field splitting of 2.1 GHz and a g-factor similar to that of the ground-state. We confirm that the resonance is associated with spin rotation in the excited-state using pulsed ODMR measurements, and we observe Zeeman-mediated level anti-crossings in both the orbital ground- and excited-state. Our observation of a single set of excited-state spin-triplet resonance from 10 to 300 K is consistent with an orbital-singlet, which has consequences for understanding the symmetry of this defect. Additionally, the excited-state ODMR has strong temperature dependence of both contrast and transverse anisotropy splitting, enabling promising avenues for quantum sensing.
description: 13 pages with 5 figures and a supplement
OroClean
Creators: name: Parslov, Jakob
name: Lønstrup, Jeanne
name: Holstebroe, Lærke
name: Torstved, Trine Duelund
name: Swersey, Burt
Publisher: name: Grøn Dyst 2010
Year: 2010

description: 30% of all mercury pollution in the world comes from small-scale mining. This causes severe health and environmental damages. To eliminate the need for mercury in artisanal mining we have created a small-scale centrifuge that can separate gold from silt without using any chemicals. To heighten the efficiency fluidizational principles are integrated. The centrifuge can be produced at a low cost, which makes it feasible to set up a sustainable business model that will generate profit throughout the value chain. With OroClean we will be able to eliminate 30% of one of the top pollution problems in the world.
Torture in Tibet
Publisher: name: Columbia University
Year: 1989
Subjects: Torture victims--China
Torture--China
Political prisoners--China
Tibetans--Imprisonment.--China
Buddhist nuns--Imprisonment.--China
Human rights--China

description: On interviews with ex-political prisoners in Lhasa regarding torture techniques, and controversy over Channel 4 (United Kingdom) showing the faces of nun interviewees in forthcoming film.
How capture affects polymer translocation in a solitary nanopore
Creators: name: Seth, Swarnadeep
name: Bhattacharya, Aniket
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: DNA capture with high fidelity is an essential part of nanopore translocation. We report several important aspects of the capture process and subsequent translocation of a model DNA polymer through a solid-state nanopore in presence of an extended electric field using the Brownian dynamics simulation that enables us to record statistics of the conformations at every stage of the translocation process. By releasing the equilibrated DNAs from different equipotentials, we observe that the capture time distribution depends on the initial starting point and follows a Poisson process. The field gradient elongates the DNA on its way towards the nanopore and favors a successful translocation even after multiple failed threading attempts. Even in the limit of an extremely narrow pore, a fully flexible chain has a finite probability of hairpin-loop capture while this probability decreases for a stiffer chain and promotes single file translocation. Our in silico studies identify and differentiate characteristic distributions of the mean first passage time due to single file translocation from those due to translocation of different types of folds and provide direct evidences of the interpretation of the experimentally observed folds [M. Gershow et al., Nat. Nanotech. 2, 775 (2007) and M. Mihovilovic et al. Phys. Rev. Letts. 110, 028102 (2013)] in a solitary nanopore. Finally, we show a new finding, - that a charged tag attached at the $5^{\prime}$ end of the DNA enhances both the multi-scan rate as well as the uni-directional translocation ($5^{\prime} \rightarrow 3^{\prime}$) probability that would benefit the genomic barcoding and sequencing experiments.
Sonnenfleckenzeichnung Nr. 13149.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.10.1935, erstellt von William Otto Brunner
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Fink: early supernovae Ia classification using active learning
Creators: name: Leoni, Marco
name: Ishida, Emille E. O.
name: Peloton, Julien
name: Möller, Anais
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We describe how the Fink broker early supernova Ia classifier optimizes its ML classifications by employing an active learning (AL) strategy. We demonstrate the feasibility of implementation of such strategies in the current Zwicky Transient Facility (ZTF) public alert data stream. We compare the performance of two AL strategies: uncertainty sampling and random sampling. Our pipeline consists of 3 stages: feature extraction, classification and learning strategy. Starting from an initial sample of 10 alerts (5 SN Ia and 5 non-Ia), we let the algorithm identify which alert should be added to the training sample. The system is allowed to evolve through 300 iterations. Our data set consists of 23 840 alerts from the ZTF with confirmed classification via cross-match with SIMBAD database and the Transient name server (TNS), 1 600 of which were SNe Ia (1 021 unique objects). The data configuration, after the learning cycle was completed, consists of 310 alerts for training and 23 530 for testing. Averaging over 100 realizations, the classifier achieved 89% purity and 54% efficiency. From 01/November/2020 to 31/October/2021 Fink has applied its early supernova Ia module to the ZTF stream and communicated promising SN Ia candidates to the TNS. From the 535 spectroscopically classified Fink candidates, 459 (86%) were proven to be SNe Ia. Our results confirm the effectiveness of active learning strategies for guiding the construction of optimal training samples for astronomical classifiers. It demonstrates in real data that the performance of learning algorithms can be highly improved without the need of extra computational resources or overwhelmingly large training samples. This is, to our knowledge, the first application of AL to real alerts data.
description: accepted for publication in Astronomy and Astrophysics
Sonnenfleckenzeichnung Nr. 13146.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 16.10.1935, erstellt von Max Broger
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Machine learning synthetic spectra for probabilistic redshift estimation: SYTH-Z
Creators: name: Ramachandra, Nesar
name: Chaves-Montero, Jonás
name: Alarcon, Alex
name: Fadikar, Arindam
name: Habib, Salman
name: Heitmann, Katrin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Photometric redshift estimation algorithms are often based on representative data from observational campaigns. Data-driven methods of this type are subject to a number of potential deficiencies, such as sample bias and incompleteness. Motivated by these considerations, we propose using physically motivated synthetic spectral energy distributions in redshift estimation. In addition, the synthetic data would have to span a domain in colour-redshift space concordant with that of the targeted observational surveys. With a matched distribution and realistically modelled synthetic data in hand, a suitable regression algorithm can be appropriately trained; we use a mixture density network for this purpose. We also perform a zero-point re-calibration to reduce the systematic differences between noise-free synthetic data and the (unavoidably) noisy observational data sets. This new redshift estimation framework, SYTH-Z, demonstrates superior accuracy over a wide range of redshifts compared to baseline models trained on observational data alone. Approaches using realistic synthetic data sets can therefore greatly mitigate the reliance on expensive spectroscopic follow-up for the next generation of photometric surveys.
description: 14 pages, 8 figures
Sonnenfleckenzeichnung Nr. 293.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 25.11.1973, erstellt von Araldo Pittini, Sonnenobservatorium Specola Solare Ticinese in Locarno
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1973

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Projektionsbildzeichnung für die Beobachtungen in Locarno-Monti auf dem Vordruck der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss-Coudé-Refraktor mit 15 cm Öffnung und 225 cm Brennweite.
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
Optimization of Trailer Transport
Creators: name: Kallestrup, Kasper Bislev
name: Larsen, Jesper
Publisher: name: Grøn Dyst 2010
Year: 2010

description: 20% of Europe’s GHG emissions come from road transportation. Freight transport energy consumption, and thus emission levels, is tightly coupled to GDP. So if Europe seeks to dramatically reduce emissions without sacrificing wealth, it is crucial to address the issue of energy efficiency within the road transportation sector. Today, empty journeys comprise 25%-40% of all road haulage. To address that issue the goal of this project is to describe and solve an optimization program that utilizes the opportunity for trailer-haulers to exchange trailers mid-way. If successful, this will allow haulers to reduce their amount of empty journeys, benefiting the environment.
Classical solutions of $λ$-deformed coset models
Creators: name: Katsinis, Dimitrios
name: Panopoulos, Pantelis
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We obtain classical solutions of $ł$-deformed $\s$-models based on $SL(2,\mathbb{R})/U(1)$ and $SU(2)/U(1)$ coset manifolds. Using two different sets of coordinates, we derive two distinct classes of solutions. The first class is expressed in terms of hyperbolic and trigonometric functions, whereas the second one in terms of elliptic functions. We analyze their properties along with the boundary conditions and discuss string systems that they describe. It turns out that there is an apparent similarity between the solutions of the second class and the motion of a pendulum.
description: 36+9 pages, 8 figures
Latest Findings on the Behaviour Factor q for the Seismic Design of URM Buildings
Creators: name: Morandi, Paolo
name: Butenweg, Christoph
name: Breis, Khaled
name: Beyer, Katrin
name: Magenes, Guido
Publisher: name: RWTH Aachen University
Year: 2021

description: 42 Seiten (2021). doi:10.21203/rs.3.rs-633901/v1
Weighing the Galactic disk using phase-space spirals III. Probing distant regions of the disk using the Gaia EDR3 proper motion sample
Creators: name: Widmark, Axel
name: Laporte, Chervin F. P.
name: Monari, Giacomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We have applied our method for weighing the Galactic disk using phase-space spirals to the Gaia EDR3 proper motion sample. For stars in distant regions of the Galactic disk, the latitudinal proper motion has a close projection with vertical velocity, such that the phase-space spiral in the plane of vertical position and vertical velocity can be observed without requiring that all stars have available radial velocity information. We divided the Galactic plane into 360 separate data samples, each corresponding to an area cell in the Galactic plane in the distance range of 1.4-3.4 kpc, with an approximate cell length of 200-400 pc. Roughly half of our data samples were disqualified altogether due to severe selection effects, especially in the direction of the Galactic centre. In the remainder, we were able to infer the vertical gravitational potential by fitting an analytic model of the phase-space spiral to the data. This work is the first of its kind, in the sense that we are weighing distant regions of the Galactic disk with a high spatial resolution, without relying on the strong assumptions of axisymmetry. Post-inference, we fit a thin disk scale length of $2.2\pm 0.1$ kpc, although this value is sensitive to the considered spatial region. We see surface density variations as a function of azimuth on the order of 10-20 %, which is roughly the size of our estimated sum of potential systematic biases. With this work, we have demonstrated that our method can be used to weigh distant regions of the Galactic disk despite strong selection effects. We expect to reach even greater distances and improve our accuracy with future Gaia data releases and further improvements to our method.
description: 18 pages, 19 figures, accepted for publication in A&A
Optimised Energy Harvesting using Polypower
Creators: name: Korff, Lasse
name: Andersen, Michael A. E.
name: Thomsen, Ole C.
Publisher: name: Grøn Dyst 2010
Year: 2010

description: When stretching a Dielectric Electro Active Polymer(DEAP) the capacitance of it changes and by that it is possible to harvest energy. This project investigates the great issues of designing the electronics to charge and discharge the DEAP. An analysis of all the elements concerning the electronics has been carried out and based on that a converter has been built and tested.
Brief an Theodor Zwinger III
Creators: name: Cregut, Friedrich Christ
Publisher: name: [s.n.]
Year: 1697

description: von Friedr[ich] Christ Cregutus
description: Lateinisch
description: Verzeichnung=Description=Inventaire Vollständige Rekatalogisierung nach Standortverzeichnis Frey-Gryn Mscr II 1/III 18
Punctures and p-spin curves from matrix models III. Dl type and logarithmic potential
Creators: name: Hikami, Shinobu
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The intersection numbers for p spin curves of the moduli space M(g,n) are considered for D type by a matrix model. The asymptotic behavior of the large genus g limit and large p limit are derived. The remarkable features of the cases of p= 1/2, - 1/2, -2, -3 are examined in the Laurent expansion for multiple correlation functions. The strong coupling expansions for the negative p cases are considered.
description: 40 pages
Optimering af typehus til lavenergiklasse 0
Creators: name: Bruun, Lykke
name: Petersen, Pam
name: Svendsen, Svend
Publisher: name: Grøn Dyst 2010
Year: 2010

description: Det bliver i rapporten undesøgt om der er muligt at opføre et typehus som et lavenergiklasse 0 hus, uden at foretage drastiske ændringer af huset. Der ud over skal der ikke være nogen modstridende faktorer, samt at der termiske komfort opretholdes.
Sonnenfleckenzeichnung Nr. 13200.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.12.1935, erstellt von William Brunner, Assistent
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Relativistic hydrodynamic model with the average reverse gamma factor evolution for the degenerate plasmas: high-density ion-acoustic solitons
Creators: name: Andreev, Pavel A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: High-density low-temperature plasmas with degenerate species are considered in the limit of high Fermi velocities close to the speed of light. The small amplitude ion-acoustic solitons are studied in this regime. Presented analysis is based on the relativistic hydrodynamic model with the average reverse gamma factor evolution consists of the equations for evolution of the following functions the concentration, the velocity field, the average reverse relativistic gamma factor, and the flux of the reverse relativistic gamma factor, which are considered as main hydrodynamic variables. Justification of the suggested model via comparison of the hydrodynamic results with the result of application of the relativistic Vlasov kinetic equation is made in the linear approximation.
description: 10 pages
Leaus
Creators: name: Matthews, Eric G.
name: Lawrence, John F.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Tenebrionidae
Leaus

description: Key to the species of Leaus
1. Prothorax distinctly narrower than elytral bases, with lateral carinae entire, disc with a pair of low median tumosities (Figs 27, 30). Elytra with basal tumosities and a transverse depression behind them (Figs 33, 34). Total length> 5 mm ............ 2
- Prothorax not or only slightly narrower than elytral bases, with lateral carinae dentate or crenulate (Figs 28, 29, 31, 32), disc evenly convex. Elytral disc only slightly uneven. Total length ≤ 4 mm .......................................... 3
2(1). Prothorax widest at middle (Fig. 27). Basal elytral tumosities not very prominent (Fig. 33). Legs uniformly castaneous. Ovi- positor with gonostyli. Western Tas......................................... L. tasmanicus Matthews & Lawrence
- Prothorax widest behind middle (Fig. 30). Basal elytral tumosities prominent (Fig. 34). Legs fuscous with contrasting flavo- castaneous bands. Ovipositor without gonostyli. NE NSW....................................... L. monteithi sp. n.
3(1). Lateral pronotal carinae irregularly dentate, prothorax a little narrower than elytral bases (Figs 28, 29). Qld wet tropics........................................................................................... L. tropicalis sp. n.
- Lateral pronotal carinae regularly denticulate or crenulate. Prothorax as wide as elytral bases (Figs 31, 32).............. 4
4(3). Lateral pronotal carinae crenulate (Fig. 31). NE NSW............................................. L. elusus sp. n.
- Lateral pronotal carinae evenly denticulate (Fig. 32). SE Qld............................................... L. sp.
description: Published as part of Matthews, Eric G. & Lawrence, John F., 2015, Trachelostenini sensu novo: redescriptions of Trachelostenus Solier, Myrmecodema Gebien and Leaus Matthews & Lawrence, based on adults and larvae, and descriptions of three new species of Leaus (Coleoptera: Tenebrionidae), pp. 289-312 in Zootaxa 4020 (2) on page 304, DOI: 10.11646/zootaxa.4020.2.4, http://zenodo.org/record/236475
Payoff landscapes and the robustness of selfish optimization in iterated games
Creators: name: Mirani, Arjun
name: McAvoy, Alex
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: In iterated games, a player can unilaterally exert influence over the outcome through a careful choice of strategy. A powerful class of such "payoff control" strategies was discovered by Press and Dyson (2012). Their so-called "zero-determinant" (ZD) strategies allow a player to unilaterally enforce a linear relationship between both players' payoffs. It was subsequently shown by Chen and Zinger (2014) that when the slope of this linear relationship is positive, ZD strategies are robustly effective against a selfishly optimizing co-player, in that all adapting paths of the selfish player lead to the maximal payoffs for both players (at least when there are certain restrictions on the game parameters). In this paper, we investigate the efficacy of selfish learning against a fixed player in more general settings, for both ZD and non-ZD strategies. We first prove that in any symmetric $2\times 2$ game, the selfish player's final strategy must be of a certain form and cannot be fully stochastic. We then show that there are prisoner's dilemma interactions for which selfish optimization does not always lead to maximal payoffs against fixed ZD strategies with positive slope. We give examples of selfish adapting paths that lead to locally but not globally optimal payoffs, undermining the robustness of payoff control strategies. For non-ZD strategies, these pathologies arise regardless of the original restrictions on the game parameters. Our results illuminate the difficulty of implementing robust payoff control and selfish optimization, even in the simplest context of playing against a fixed strategy.
description: 26 pages; final version
One-loop calculations in CPT-even Lorentz-breaking scalar QED
Creators: name: Scarpelli, A. P. Baêta
name: Felipe, J. C. C.
name: Brito, L. C. T.
name: Petrov, A. Yu.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we study a CPT-even Lorentz-breaking extension of the scalar QED. For this theory, we calculate the one-loop lower-order contributions in the Lorentz-violating parameters to the two-point functions of scalar and gauge fields. We found that the two background tensors, coming from the two sectors (scalar and gauge) are mixed in the one-loop corrections both in finite and divergent parts. This shows that these two Lorentz-breaking terms cannot be studied in an isolated form. Besides, the results in the gauge sector are confirmed to be transversal.
description: 13 pages, 2 figures, accepted to Mod. Phys. Lett. A
Sonnenfleckenzeichnung Nr. 13171.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 19.11.1935, erstellt von William Otto Brunner
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich, später ergänzt mit einer kleinen Tabelle für die Auszählung der Flecken nach ihrer Verteilung auf Abschnitte der sichtbaren Sonnenhälfte, nach Quadrant bzw. nach Halbkugel (N, S, W, E). 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
Oil Pollution at sea and the effect on the fauna
Creators: name: Afriyie, Elvis
name: Kusk, Kresten Ole
Publisher: name: Grøn Dyst 2010
Year: 2010

description: Oil pollution at sea is one of the major environmental problems today. A good example is the oil release from the BP well in the United States of America and it's consequences. Therefore there is a need to prevent oil spreading to larger area and to migitate the adverse impact on fauna and on the environment. Some of the solutions to this problem is presented in my project.
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.12.1935, erstellt als Zürcher Tagesaufnahme von William Brunner, Assistent
Creators: name: Eidgenössische Sternwarte in Zürich (ETH Zürich bzw. vor 1911 Polytechnikum)
Publisher: name: [s.n.]
Year: 1935

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
Occurrence and Distribution of Antibiotic Resistance in Artic Bacteria to Enviromental Antibiotic Exposure and Human Fecal Contamination
Creators: name: Lozano, María Gómez
name: Saltini, Rolando
name: Dahllöf, Ingela
name: Granberg, Maria E
name: Villumsen, Arne
Publisher: name: Grøn Dyst 2010
Year: 2010

description: Sewage treatment plants are lacking in Sisimiut (Greenland). Thus, untreated wastewater from Sisimiut´s hospital containing active antibiotics is discharged directly into the sea. The effect of the antibiotic contamination in the marine ecosystem was investigated. Bacteria with acquired resistance towards several antibiotics were found in the contaminated site, including potential human pathogens. The presence of bacteria with acquired antibiotic resistance is a problem for both the marine ecosystem and human health, as well as a threat for the consumers of Greenlandic fish and, therefore, for the Greenlandic economy.
Cosmogenic Background Rejection at the ICARUS
Creators: name: Biswaranjan Behera
Publisher: name: Zenodo
Year: 2022

description: The ICARUS detector will search for LSND-like neutrino oscillations exposed at shallow depth to the FNAL BNB beam as the far detector in the Short-Baseline Neutrino (SBN) program. Cosmic backgrounds rejection is particularly important for the ICARUS detector due to its larger size and distance from neutrino production compared to the near detector SBND. In ICARUS the neutrino signal over cosmic background ratio is 40 times more unfavorable compared to SBND, in addition a greater than 3 times larger out-of-spill comics rate. On this poster, I will illustrate techniques for reducing cosmogenic backgrounds in the ICARUS detector.