cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On Delta Sets and their Realizable Subsets in Krull Monoids with Cyclic Class Groups
Creators: name: Chapman, Scott T.
name: Gotti, Felix
name: Pelayo, Roberto
Publisher: name: arXiv
Year: 2016
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics

description: Let $M$ be a commutative cancellative monoid. The set $Δ(M)$, which consists of all positive integers which are distances between consecutive factorization lengths of elements in $M$, is a widely studied object in the theory of nonunique factorizations. If $M$ is a Krull monoid with cyclic class group of order $n \ge 3$, then it is well-known that $Δ(M) \subseteq \{1, \dots, n-2\}$. Moreover, equality holds for this containment when each class contains a prime divisor from $M$. In this note, we consider the question of determining which subsets of $\{1, \dots, n-2\}$ occur as the delta set of an individual element from $M$. We first prove for $x \in M$ that if $n - 2 \in Δ(x)$, then $Δ(x) = \{n-2\}$ (i.e., not all subsets of $\{1,\dots, n-2\}$ can be realized as delta sets of individual elements). We close by proving an Archimedean-type property for delta sets from Krull monoids with finite cyclic class group: for every natural number m, there exist a Krull monoid $M$ with finite cyclic class group such that $M$ has an element $x$ with $|Δ(x)| \ge m$.
description: 10 pages
Primordial black hole constraints with Hawking radiation -- a review
Creators: name: Auffinger, Jérémy
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Primordial black holes are under intense scrutiny since the detection of gravitational waves from mergers of solar-mass black holes in 2015. More recently, the development of numerical tools and the precision observational data have rekindled the effort to constrain the black hole abundance in the lower mass range, that is $M < 10^{23}$g. In particular, primordial black holes of asteroid mass $M \sim 10^{17}-10^{23}\,$g may represent 100\% of dark matter. While the microlensing and stellar disruption constraints on their abundance have been relieved, Hawking radiation of these black holes seems to be the only detection (and constraining) mean. Hawking radiation constraints on primordial black holes date back to the first papers by Hawking. Black holes evaporating in the early universe may have generated the baryon asymmetry, modified big bang nucleosynthesis, distorted the cosmic microwave background, or produced cosmological backgrounds of stable particles such as photons and neutrinos. At the end of their lifetime, exploding primordial black holes would produce high energy cosmic rays that would provide invaluable access to the physics at energies up to the Planck scale. In this review, we describe the main principles of Hawking radiation, which lie at the border of general relativity, quantum mechanics and statistical physics. We then present an up-to-date status of the different constraints on primordial black holes that rely on the evaporation phenomenon, and give, where relevant, prospects for future work. In particular, non-standard black holes and emission of beyond the Standard Model degrees of freedom is currently a hot subject.
description: 70 pages, 15 figures, invited review submitted for publication to Progress in Particle and Nuclear Physics
CIV Emission Line Properties and Systematic Trends in Quasar Black Hole Mass Estimates
Creators: name: Coatman, Liam
name: Hewett, Paul C.
name: Banerji, Manda
name: Richards, Gordon T.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Black-hole masses are crucial to understanding the physics of the connection between quasars and their host galaxies and measuring cosmic black hole-growth. At high redshift, z > 2.1, black hole masses are normally derived using the velocity-width of the CIV broad emission line, based on the assumption that the observed velocity-widths arise from virial-induced motions. In many quasars, the CIV-emission line exhibits significant blue asymmetries (`blueshifts') with the line centroid displaced by up to thousands of km/s to the blue. These blueshifts almost certainly signal the presence of strong outflows, most likely originating in a disc wind. We have obtained near-infrared spectra, including the H$α$ emission line, for 19 luminous ($L_{Bol}$ = 46.5-47.5 erg/s) Sloan Digital Sky Survey quasars, at redshifts 2 < z < 2.7, with CIV emission lines spanning the full-range of blueshifts present in the population. A strong correlation between CIV-velocity width and blueshift is found and, at large blueshifts, > 2000 km/s, the velocity-widths appear to be dominated by non-virial motions. Black-hole masses, based on the full width at half maximum of the CIV-emission line, can be overestimated by a factor of five at large blueshifts. A larger sample of quasar spectra with both CIV and H$β$, or H$α$, emission lines will allow quantitative corrections to CIV-based black-hole masses as a function of blueshift to be derived. We find that quasars with large CIV blueshifts possess high Eddington luminosity ratios and that the fraction of high-blueshift quasars in a flux-limited sample is enhanced by a factor of approximately four relative to a sample limited by black hole mass.
description: Accepted for publication in MNRAS (21 pages, 11 figures, 4 tables)
Saliency Cards: A Framework to Characterize and Compare Saliency Methods
Creators: name: Boggust, Angie
name: Suresh, Harini
name: Strobelt, Hendrik
name: Guttag, John V.
name: Satyanarayan, Arvind
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Saliency methods are a common class of machine learning interpretability techniques that calculate how important each input feature is to a model's output. We find that, with the rapid pace of development, users struggle to stay informed of the strengths and limitations of new methods and, thus, choose methods for unprincipled reasons (e.g., popularity). Moreover, despite a corresponding rise in evaluation metrics, existing approaches assume universal desiderata for saliency methods (e.g., faithfulness) that do not account for diverse user needs. In response, we introduce saliency cards: structured documentation of how saliency methods operate and their performance across a battery of evaluative metrics. Through a review of 25 saliency method papers and 33 method evaluations, we identify 10 attributes that users should account for when choosing a method. We group these attributes into three categories that span the process of computing and interpreting saliency: methodology, or how the saliency is calculated; sensitivity, or the relationship between the saliency and the underlying model and data; and, perceptibility, or how an end user ultimately interprets the result. By collating this information, saliency cards allow users to more holistically assess and compare the implications of different methods. Through nine semi-structured interviews with users from various backgrounds, including researchers, radiologists, and computational biologists, we find that saliency cards provide a detailed vocabulary for discussing individual methods and allow for a more systematic selection of task-appropriate methods. Moreover, with saliency cards, we are able to analyze the research landscape in a more structured fashion to identify opportunities for new methods and evaluation metrics for unmet user needs.
description: Published at FAccT 2023, 19 pages, 8 figures, 2 tables
AccuracyTrader: Accuracy-aware Approximate Processing for Low Tail Latency and High Result Accuracy in Cloud Online Services
Creators: name: Han, Rui
name: Huang, Siguang
name: Tang, Fei
name: Chang, Fugui
name: Zhan, Jianfeng
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Modern latency-critical online services such as search engines often process requests by consulting large input data spanning massive parallel components. Hence the tail latency of these components determines the service latency. To trade off result accuracy for tail latency reduction, existing techniques use the components responding before a specified deadline to produce approximate results. However, they may skip a large proportion of components when load gets heavier, thus incurring large accuracy losses. This paper presents AccuracyTrader that produces approximate results with small accuracy losses while maintaining low tail latency. AccuracyTrader aggregates information of input data on each component to create a small synopsis, thus enabling all components producing initial results quickly using their synopses. AccuracyTrader also uses synopses to identify the parts of input data most related to arbitrary requests' result accuracy, thus first using these parts to improve the produced results in order to minimize accuracy losses. We evaluated AccuracyTrader using workloads in real services. The results show: (i) AccuracyTrader reduces tail latency by over 40 times with accuracy losses of less than 7% compared to existing exact processing techniques; (ii) when using the same latency, AccuracyTrader reduces accuracy losses by over 13 times comparing to existing approximate processing techniques.
description: 10 pages, 8 figures, 2 tables
Modelling quantum black hole
Creators: name: Govindarajan, T. R.
name: Munõz-Castañeda, J. M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Novel bound states are obtained for manifolds with singular potentials. These singular potentials require proper boundary conditions across boundaries. The number of bound states match nicely with what we would expect for black holes. Also they serve to model membrane mechanism for the black hole horizons in simpler contexts. The singular potentials can also mimic expanding boundaries elegantly, there by obtaining appropriately tuned radiation rates.
description: 14 pages, 3 figures, to appear in Modern Phys Letts A
Connecting Radiative Neutrino Mass, Neutron-Antineutron Oscillation, Proton Decay, and Leptogenesis through Dark Matter
Creators: name: Gu, Pei-Hong
name: Ma, Ernest
name: Sarkar, Utpal
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The scotogenic mechanism for radiative neutrino mass is generalized to include neutron-antineutron oscillation as well as proton decay. Dark matter is stabilized by extending the notion of lepton parity to matter parity. Leptogenesis is also a possible byproduct. This framework unifies the description of all these important, but seemingly unrelated, topics in physics beyond the standard model of particle interactions.
description: 11 pages, 4 figures
Non-volatile electric control of spin-orbit torques in an oxide two-dimensional electron gas
Creators: name: Grezes, Cécile
name: Kandazoglou, Aurélie
name: Cosset-Cheneau, Maxen
name: Arche, Luis
name: Noël, Paul
name: Sgarro, Paolo
name: Auffret, Stephane
name: Garello, Kevin
name: Bibes, Manuel
name: Vila, Laurent
name: Attané, Jean-Philippe
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spin-orbit torques (SOTs) have opened a novel way to manipulate the magnetization using in-plane current, with a great potential for the development of fast and low power information technologies. It has been recently shown that two-dimensional electron gases (2DEGs) appearing at oxide interfaces provide a highly efficient spin-to-charge current interconversion. The ability to manipulate 2DEGs using gate voltages could offer a degree of freedom lacking in the classical ferromagnetic/spin Hall effect bilayers for spin-orbitronics, in which the sign and amplitude of SOTs at a given current are fixed by the stack structure. Here, we report the non-volatile electric-field control of SOTs in an oxide-based Rashba-Edelstein 2DEG. We demonstrate that the 2DEG is controlled using a back-gate electric-field, providing two remanent and switchable states, with a large resistance contrast of 1064%. The SOTs can then be controlled electrically in a non-volatile way, both in amplitude and in sign. This achievement in a 2DEG-CoFeB/MgO heterostructures with large perpendicular magnetization further validates the compatibility of oxide 2DEGs for magnetic tunnel junction integration, paving the way to the advent of electrically reconfigurable SOT MRAMS circuits, SOT oscillators, skyrmion and domain-wall-based devices, and magnonic circuits.
From Quantum to Classical in the Sky
Creators: name: Singh, Suprit
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inflation has by-far set itself as one of the prime ideas in the current cosmological models that seemingly has an answer for every observed phenomenon in cosmology. More importantly, it serves as a bridge between the early quantum fluctuations and the present-day classical structures. Although the transition from quantum to classical is still not completely understood till date, there are two assumptions made in the inflationary paradigm in this regard: (i) the modes (metric perturbations or fluctuations) behave classically once they are well outside the Hubble radius and, (ii) once they become classical they stay classical and hence can be described by standard perturbation theory after they re-enter the Hubble radius. We critically examine these assumptions for the tensor modes of (linear) metric perturbations in a toy three stage universe with (i) inflation, (ii) radiation-dominated and (iii) late-time accelerated phases. The quantum-to-classical transition for these modes is evident from the evolution of Wigner function in phase space and its peaking on the classical trajectory. However, a better approach to quantify the degree of classicality and study its evolution was given by Mahajan and Padmanabhan [1] using a classicality parameter constructed from the parameters of the Wigner function. We study the evolution of the classicality parameter across the three phases and it turns out that the first assumption holds true, there is emergence of classicality on Hubble exit, however the latter assumption of "once classical, always classical" seems to lie on a shaky ground.
description: Contribution to the Festschrift in honor of Prof. T. Padmanabhan on the occassion of his 60th birthday. Extending the results of arXiv:1308.4976 to tensor perturbations. Title from my poster presented at ICTP Summer School on Cosmology, June 2016
Metabolic Aspects of the Accessory Genome of Staphylococcus epidermidis
Creators: name: Almebairik, Nada Fahad
Publisher: name: University of Leicester
Year: 2022
Subjects: Uncategorized

description: Horizontal gene transfer plays an important role in changing the compositions of bacterial genomes over a short period of time. This process entails the transfer of genetic elements between different bacteria which is a key mechanism in bacterial diversity and evolution. In this study, I aimed to investigate the evolution of the S. epidermidis genome by focusing on three aspects: the prevalence of the SCC mobile element, the presence of the core-genes paralogs and the variability of sugar transporters. A core genome phylogenetic tree of 58 S. epidermidis clinical isolates was constructed. The MLST data showed that more than half the isolates belonged to the clinically predominant ST2 clone. Genomic analysis revealed the presence of the SCCmec in the majority of the isolates and identified ACME-positive isolates clustered in one lineage, with most of them belonging to ST48. COMER-like elements were identified in ST2 lineages. Interestingly, this is the first molecular characterization of the COMER-like element in S. epidermidis isolates. Several genomic analyses were carried out to identify core-gene paralogs using S. epidermidis ATCC12228 as a reference strain. Three out of four ST5 isolates were found to harbour five core-gene paralogs in two operons involved in the pentose phosphate pathway and formaldehyde assimilation. A different isolate was found to carry an oleate hydratase gene (ohyA) paralog, and this isolate showed lower susceptibility to the antimicrobial fatty acid in comparison to the control. Finally, the genomic analysis identified 19 putative carbohydrate transporter encoding genes, the majority of which (9/19) encoded PTS transporters. Additionally, a putative sorbitol PTS transporter was detected in STAPH 25. The analysis showed that this transporter was located in the SCCmec IV element, and the phenotypic assay revealed the ability of STAPH 25 to utilize sorbitol in comparison to the control.
Fair Classification via Domain Adaptation: A Dual Adversarial Learning Approach
Creators: name: Liang, Yueqing
name: Chen, Canyu
name: Tian, Tian
name: Shu, Kai
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Modern machine learning (ML) models are becoming increasingly popular and are widely used in decision-making systems. However, studies have shown critical issues of ML discrimination and unfairness, which hinder their adoption on high-stake applications. Recent research on fair classifiers has drawn significant attention to developing effective algorithms to achieve fairness and good classification performance. Despite the great success of these fairness-aware machine learning models, most of the existing models require sensitive attributes to pre-process the data, regularize the model learning or post-process the prediction to have fair predictions. However, sensitive attributes are often incomplete or even unavailable due to privacy, legal or regulation restrictions. Though we lack the sensitive attribute for training a fair model in the target domain, there might exist a similar domain that has sensitive attributes. Thus, it is important to exploit auxiliary information from a similar domain to help improve fair classification in the target domain. Therefore, in this paper, we study a novel problem of exploring domain adaptation for fair classification. We propose a new framework that can learn to adapt the sensitive attributes from a source domain for fair classification in the target domain. Extensive experiments on real-world datasets illustrate the effectiveness of the proposed model for fair classification, even when no sensitive attributes are available in the target domain.
Slide Deck Technical Summary: Book Analytics Dashboard (BAD) Demonstration Project (2022-2025)
Creators: name: Montgomery, Lucy
name: Neylon, Cameron
name: Stern, Niels
name: Skinner, Katherine
name: Snijder, Ronald
name: Napier, Kathryn
name: Handcock, Rebecca N
name: Smith, Keegan
Publisher: name: Zenodo
Year: 2022
Subjects: Open Access
Book Analytics
Metrics
Analytics
Scholarly Communication
Publishing
Libraries
bad-project

description: This short deck provides key technical information about the Book Analytics Dashboard (BAD) Demonstration project. The Book Analytics Dashboard Project (2022-2025) is focused on creating a sustainable OA Book focused analytics service. This service is needed to safeguard and support diversity in the voices, perspectives, geographies, topics and languages made visible through OA Books. Funded by the Mellon Foundation, the Book Analytics Dashboard project is building on an earlier Mellon-funded initiative: Developing a Pilot Data Trust for OA eBook Usage (2020 – 2022). In addition to scaling workflows, infrastructure and customer support, the Demonstration Project is developing a long-term plan for housing, maintenance and funding of the analytics service as a sustainable community infrastructure. More Information - Visit the BAD Project website: http://book-analytics.org - Follow the BAD Project on Twitter @BookAnalytics - Join the BAD Project mailing list: https://docs.google.com/forms/d/e/1FAIpQLSdt7m9xL_4LxY3RUlX7DFg9uq7_12c8NLtDj036eGIZszPONA/viewform - Visit the BAD Project Zenodo community: https://zenodo.org/communities/book-analytics-dashboard-project/?page=1&size=20 - See the BAD dashboard for University of Michigan Press: http://uomp-public.book-analytics.org/ - Our book-focussed GitHub Repository is available here: https://github.com/The-Academic-Observatory/oaebu-workflows - The Technical Documentation available via Read the Docs here: https://oaebu-workflows.readthedocs.io/en/latest/index.html
The Pseudomonotone Polar for Multivalued Operators
Creators: name: Bueno, Orestes
name: Cotrina, John
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 47H04, 47H05, 49J53

description: In this work, we study the pseudomonotonicity of multivalued operators from the point of view of polarity, in an analogous way as the well-known monotone polar due to Martínez-Legaz and Svaiter, and the quasimonotone polar recently introduced by Bueno and Cotrina. We show that this new polar, adapted for pseudomonotonicity, possesses analogous properties to the monotone and quasimonotone polar, among which are a characterization of pseudomonotonicity, maximality and pre-maximality. Furthermore, we characterize the notion of $D$-maximal pseudomonotonicity introduced by Hadjisavvas. We conclude this work studying the connections between pseudomonotonicity and variational inequality problems.
description: 14 pages
Cosmological Magnetic Fields from Primordial Kerr-Newman Black Holes
Creators: name: Hooper, Dan
name: Ireland, Aurora
name: Krnjaic, Gordan
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The origin of our universe's cosmological magnetic fields remains a mystery. In this study, we consider whether these magnetic fields could have been generated in the early universe by a population of charged, spinning primordial black holes. To this end, we calculate the strength and correlation length of the magnetic fields generated by this population, and describe their evolution up to the current epoch. We find that near-extremal black holes in the mass range $ M \sim 10^{28} -10^{36} \, {\rm g}$ could potentially generate magnetic fields with present day values as large as $B \sim 10^{-20} - 10^{-15} \, {\rm G}$; those with $M \gtrsim10^{38} \, \rm{g}$ could have produced even larger fields $B \gtrsim 10^{-14} \, {\rm G}$. To motivate this scenario, we briefly discuss how new physics may have induced a chemical potential which could have briefly maintained the black holes in an electrically charged state in the early universe. Finally, we comment on a correlation between the parameters of the cosmological magnetic field and the stochastic gravitational wave background coming from the merger of primordial black hole binaries as the primary observable signature of this scenario.
description: 7 pages, 1 figure
Development of high resolution arrayed waveguide grating spectrometers for astronomical applications: first results
Creators: name: Gatkine, Pradip
name: Veilleux, Sylvain
name: Hu, Yiwen
name: Zhu, Tiecheng
name: Meng, Yang
name: Bland-Hawthorn, Joss
name: Dagenais, Mario
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Instrumentation and Detectors (physics.ins-det)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Astrophotonics is the next-generation approach that provides the means to miniaturize near-infrared (NIR) spectrometers for upcoming large telescopes and make them more robust and inexpensive. The target requirements for our spectrograph are: a resolving power of about 3000, wide spectral range (J and H bands), free spectral range of about 30 nm, high on-chip throughput of about 80% (-1dB) and low crosstalk (high contrast ratio) between adjacent on-chip wavelength channels of less than 1% (-20dB). A promising photonic technology to achieve these requirements is Arrayed Waveguide Gratings (AWGs). We have developed our first generation of AWG devices using a silica-on-silicon substrate with a very thin layer of silicon-nitride in the core of our waveguides. The waveguide bending losses are minimized by optimizing the geometry of the waveguides. Our first generation of AWG devices are designed for H band and have a resolving power of around 1500 and free spectral range of about 10 nm around a central wavelength of 1600 nm. The devices have a footprint of only 12 mm x 6 mm. They are broadband (1450-1650 nm), have a peak on-chip throughput of about 80% (-1 dB) and contrast ratio of about 1.5% (-18 dB). These results confirm the robustness of our design, fabrication and simulation methods. Currently, the devices are designed for Transverse Electric (TE) polarization and all the results are for TE mode. We are developing separate J- and H-band AWGs with higher resolving power, higher throughput and lower crosstalk over a wider free spectral range to make them better suited for astronomical applications.
description: 12 pages, 13 figures, 3 tables. SPIE Astronomical Telescopes and Instrumentation, Edinburgh (26 June - 1 July, 2016)
Obligationen-Buch [Namen-]Obligationen I
Creators: name: Spar- und Leihkasse Bremgarten
Publisher: name: [s.n.]
Year: 1890

description: Darin: Register
description: Deutsch
description: Verzeichnung=Description=Inventaire 12.04.2023 Automatisierter Import Archivbestand
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Slide Deck Technical Summary: Book Analytics Dashboard (BAD) Demonstration Project (2022-2025)
Creators: name: Montgomery, Lucy
name: Neylon, Cameron
name: Stern, Niels
name: Skinner, Katherine
name: Snijder, Ronald
name: Napier, Kathryn
name: Handcock, Rebecca N
name: Smith, Keegan
Publisher: name: Zenodo
Year: 2023
Subjects: Open Access
Book Analytics
Metrics
Analytics
Scholarly Communication
Publishing
Libraries
bad-project

description: This short deck provides key technical information about the Book Analytics Dashboard (BAD) Demonstration project. The Book Analytics Dashboard Project (2022-2025) is focused on creating a sustainable OA Book focused analytics service. This service is needed to safeguard and support diversity in the voices, perspectives, geographies, topics and languages made visible through OA Books. Funded by the Mellon Foundation, the Book Analytics Dashboard project is building on an earlier Mellon-funded initiative: Developing a Pilot Data Trust for OA eBook Usage (2020 – 2022). In addition to scaling workflows, infrastructure and customer support, the Demonstration Project is developing a long-term plan for housing, maintenance and funding of the analytics service as a sustainable community infrastructure. More Information Visit the BAD project website Follow the BAD project on Twitter @BookAnalytics Join the BAD project mailing list Visit the BAD project Zenodo community See the BAD dashboard for University of Michigan Press Our book-focussed GitHub repository Our technical documentation on Read the Docs Email BAD info@book-analytics.org
description: This work was made possible through grant funding provided via the "OA Book Usage Analytics for Diverse Communities – A Demonstration Project" project funded by the Mellon Foundation and COARD.
Holomorphic differentials of Klein four covers
Creators: name: Bleher, Frauke M.
name: Camacho, Nicholas
Publisher: name: arXiv
Year: 2022
Subjects: subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: Primary 11G20, Secondary 20C20, 14H05, 14G17

description: Let $k$ be an algebraically closed field of characteristic two, and let $G$ be isomorphic to $\mathbb{Z}/2\times\mathbb{Z}/2$. Suppose $X$ is a smooth projective irreducible curve over $k$ with a faithful $G$-action, and assume that the cover $X\to X/G$ is totally ramified, in the sense that it is ramified and every branch point is totally ramified. We study to what extent the lower ramification groups of the closed points of $X$ determine the isomorphism types of the indecomposable $kG$-modules and the multiplicities with which they occur as direct summands of the space $\mathrm{H}^0(X,Ω_{X/k})$ of holomorphic differentials of $X$ over $k$. In the case when $X/G=\mathbb{P}^1_k$, we completely determine the decomposition of $\mathrm{H}^0(X,Ω_{X/k})$ into a direct sum of indecomposable $kG$-modules. Moreover, we show that the isomorphism classes of indecomposable $kG$-modules that actually occur as direct summands belong to an infinite list of non-isomorphic indecomposable $kG$-modules that contain modules of arbitrarily large $k$-dimension. In particular, our results show that [14, Theorem 6.4] is incorrect.
description: 25 pages; changed name of covered curve from $U$ to $Y$, fixed statement of Theorem 1.1, fixed typo in Example 2.19; added explanation why [14, Theorem 6.4] is incorrect in general (see Remark 2.21)
Uncertainty quantification for generalized Langevin dynamics
Creators: name: Hall, Eric Joseph
name: Katsoulakis, Markos A.
name: Rey-Bellet, Luc
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We present efficient finite difference estimators for goal-oriented sensitivity indices with applications to the generalized Langevin equation (GLE). In particular, we apply these estimators to analyze an extended variable formulation of the GLE where other well known sensitivity analysis techniques such as the likelihood ratio method are not applicable to key parameters of interest. These easily implemented estimators are formed by coupling the nominal and perturbed dynamics appearing in the finite difference through a common driving noise, or common random path. After developing a general framework for variance reduction via coupling, we demonstrate the optimality of the common random path coupling in the sense that it produces a minimal variance surrogate for the difference estimator relative to sampling dynamics driven by independent paths. In order to build intuition for the common random path coupling, we evaluate the efficiency of the proposed estimators for a comprehensive set of examples of interest in particle dynamics. These reduced variance difference estimators are also a useful tool for performing global sensitivity analysis and for investigating non-local perturbations of parameters, such as increasing the number of Prony modes active in an extended variable GLE.
description: 36 pages, 10 figures
Dressing Method for the Degasperis-Procesi Equation
Creators: name: Constantin, Adrian
name: Ivanov, Rossen
Publisher: name: arXiv
Year: 2016
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences
subject: 37K15, 35Q15, 35Q35

description: The soliton solutions of the Degasperis-Procesi equations are constructed by the implementation of the dressing method. The form of the one and two soliton solutions coincides with the form obtained by Hirota's method.
description: LaTeX, 18 pages
Rundschreiben im Namen der Naturforschenden Gesellschaft Zürich, Dr. Meyer, an die Mitglieder des Comité der naturforschenden Gesellschaft Zürich, betr. Einsicht in die Jahresrechnung, aufbewahrt im Nachlass von Joseph Wolfgang von Deschwanden (1819-1866)
Creators: name: Naturforschende Gesellschaft in Zürich
Publisher: name: [s.n.]
Year: 1858

description: Druck des handschriftlichen Rundbriefes aus Zürich, unterzeichnet von: Dr. Meyer.
Laut gedr. Mitgliederverzeichnis von 1858 war J. W. von Deschwanden seit 1850 Mitglied des Comité
Quantum imaging exploiting twisted photon pairs
Creators: name: Cui, Dianzhen
name: Yi, X. X.
name: Yang, Li-Ping
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum correlation of two-photon states has been utilized to suppress the environmental noise in imaging down to the single-photon level. However, the size of the coherence area of photon pairs limits the applications of quantum imaging based on spatial correlations. Here, we propose a quantum imaging scheme exploiting twisted photon pairs with tunable spatial-correlation regions to circumvent this limitation. We employ a bulk-density coincidence to enhance the imaging signal. Specifically, we introduce a re-scaled image signal, which is immune to the background intensity distribution profile of the photon pulse. We reveal a destructive interference between the anti-bunched photon pair and bunched photon pair in the imaging process. Our work could pave a way for twisted-photon-based quantum holography and quantum microscopy.
description: 7 pages, 4 figures, and a supplemental material
Large enhancement in high-energy photoionization of Fe XVII and missing continuum plasma opacity
Creators: name: Nahar, Sultana N.
name: Pradhan, Anil K.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Aimed at solving the outstanding problem of solar opacity, and radiation transport plasma models in general, we report substantial photoabsorption in the high-energy regime due to atomic core photo-excitations not heretofore considered. In extensive R-Matrix calculations of unprecedented complexity for an important iron ion Fe xvii (Fe$^{16+}$), with a wave function expansion of 99 Fe xviii (Fe$^{17+}$) LS core states from $n \leq 4$ complexes (equivalent to 218 fine structure levels), we find: i) up to orders of magnitude enhancement in background photoionization cross sections, in addition to strongly peaked photo-excitation-of-core resonances not considered in current opacity models, and ii) demonstrate convergence with respect to successive core excitations. The resulting increase in the monochromatic continuum, and 35% in the Rosseland Mean Opacity, are compared with the "higher-than-predicted" iron opacity measured at the Sandia Z-pinch fusion device at solar interior conditions.
description: 5 pages, 5 figures, Phys. Rev. Letts. (in press)
Compositional noise in nozzles with dissipation
Creators: name: Jain, Animesh
name: Magri, Luca
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We propose a physical model to predict indirect noise generated by the acceleration of compositional inhomogeneities in nozzles with viscous dissipation (non-isentropic nozzles). First, we derive the quasi-one-dimensional equations from the conservation laws of multicomponent flows. Second, we validate the proposed model with the experimental data available in the literature for binary mixtures of four gases. Third, we calculate the nozzle transfer functions for different Helmholtz numbers and friction factors, in both subsonic and supersonic flows with/without shock waves. We show that friction has a significant effect on the generation of indirect noise, for which the physical mechanism is identified and explained. Fourth, we find a semi-analytical solution with path integrals, which provide an asymptotic expansion with respect to the Helmholtz number. Fifth, we introduce the compositional noise scaling factor, which is applied to quickly estimate compositional noise from the knowledge of only one single-component gas transfer function. The approximation error is less than $1\%$. The proposed low-order model provides accurate estimates of the transfer functions and physical insight into indirect noise for multicomponent gases. This opens up new possibilities to accurately predict, and understand, sound generation in gas turbines.
Xerokopie von: Joseph Wolfgang von Deschwanden (1819-1866) an Johann Konrad Kern (1808-1888), Präsident des Schweizerischen Schulrates
Creators: name: Deschwanden, Joseph Wolfgang von
Publisher: name: [s.n.]
Year: 1855

description: Brief aus Zürich, betr. Bestellungen zur Ausrüstung der Schule, u.a. mit Metallen etc.
Entspricht dem Original der Akteneingänge des Schulrats, SR3:1855, Nr. 35, vom 17. Januar 1855.
Digitalisat der Briefxerokopie und zusätzlich eingefügt Digitalisat ab Original, das bei den Akten des Schulrats liegt.
Brief, im Original notiert auf 2 Bl./2 S.
Instability of spiral and scroll waves in the presence of a gradient in the fibroblast density: the effects of fibroblast-myocyte coupling
Creators: name: Zimik, Soling
name: Pandit, Rahul
Publisher: name: arXiv
Year: 2016
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Tissues and Organs (q-bio.TO)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Fibroblast-myocyte coupling can modulate electrical-wave dynamics in cardiac tissue. In diseased hearts, the distribution of fibroblasts is heterogeneous, so there can be gradients in the fibroblast density (henceforth we call this GFD) especially from highly injured regions, like infarcted or ischemic zones, to less-wounded regions of the tissue. Fibrotic hearts are known to be prone to arrhythmias, so it is important to understand the effects of GFD in the formation and sustenance of arrhythmic re- entrant waves, like spiral or scroll waves. Therefore, we investigate the effects of GFD on the stability of spiral and scroll waves of electrical activation in a state-of-the- art mathematical model for cardiac tissue in which we also include fibroblasts. By introducing GFD in controlled ways, we show that spiral and scroll waves can be unstable in the presence of GFDs because of regions with varying spiral or scroll-wave frequency ω, induced by the GFD. We examine the effects of the resting membrane potential of the fibroblast and the number of fibroblasts attached to the myocytes on the stability of these waves. Finally, we show that the presence of GFDs can lead to the formation of spiral waves at high-frequency pacing.
description: 20 pages, 15 figures
Decay of correlations for critically intermittent systems
Creators: name: Kalle, Charlene
name: Zeegers, Benthen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics
subject: 37A05, 37A25, 37E05, 37H05

description: For a family of random intermittent dynamical systems with a superattracting fixed point we prove that a phase transition occurs between the existence of an absolutely continuous invariant probability measure and infinite measure depending on the randomness parameters and the orders of the maps at the superattracting fixed point. In case the systems have an absolutely continuous invariant probability measure, we show that the systems are mixing and that the correlations decay polynomially even though some of the deterministic maps present in the system have exponential decay. This contrasts other known results, where random systems adopt the best decay rate of the deterministic maps in the systems.
description: 32 pages, 2 figures
A CFT interpretation of cosmological correlation functions in $α-$vacua in de-Sitter space
Creators: name: Jain, Sachin
name: Kundu, Nilay
name: Kundu, Suman
name: Mehta, Abhishek
name: Sake, Sunil Kumar
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: de-Sitter(dS) space allows for a generalized class of vacua, known as $α-$vacua, described by some parameters. The Bunch-Davies (BD) vacua is a point in this parameter space. The cosmological correlation function is mostly discussed in BD vacuum in four dimensions and can be interpreted as $CFT_3$ correlation function of certain operators. However, the correlation function in $α-$vacua takes a much more complicated form. In this paper, we give a simple prescription to compute correlation function in $α-$vacua in terms of correlation function of BD vacuum. We also show that the correlation function in the $α-$vacua can be related to three-dimensional CFT correlation functions if we relax the requirement of consistency with OPE limit. Relaxation of consistency with OPE limit can be naturally achieved in momentum space.
description: v2, Added references and corrected typos
Remarks on the Woods-Saxon Potential
Creators: name: Capak, M
name: Gonul, B
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: More recently, comprehensive application results of approximate analytical solutions of the Woods-Saxon potential in closed form for the 5-dimensional Bohr Hamiltonian have been appeared [14] and its comparison to the data for many different nuclei has clearly revealed the domains for the sucsess and failure in case of using such potential forms to analyse the data concerning with the nuclear structure of deformed nuclei within the frame of the collective model. Gaining confidence from this work, exact solvability of the Woods-Saxon type potentials in lower dimensions for the bound states having zero angular momentum is carefully reviewed to finalize an ongoing discussion in the related literature and clearly shown that such kind of potentials have no analytical solutions even for l=0 case.
description: 8 pages, Mod.Phys.Lett.A (2016)
Obligationen-Buch [Namen-]Obligationen II
Creators: name: Spar- und Leihkasse Bremgarten
Publisher: name: [s.n.]
Year: 1894

description: Darin: Register
description: Deutsch
description: Verzeichnung=Description=Inventaire 12.04.2023 Automatisierter Import Archivbestand
description: Verzeichnung=Description=Inventaire ISAD(G) / HAN Katalogisierungsregeln für Archivbestände Detailliert
Intercell Moiré Exciton Complexes in Electron Lattices
Creators: name: Wang, Xi
name: Zhang, Xiaowei
name: Zhu, Jiayi
name: Park, Heonjoon
name: Wang, Yingqi
name: Wang, Chong
name: Holtzmann, William
name: Taniguchi, Takashi
name: Watanabe, Kenji
name: Yan, Jiaqiang
name: Gamelin, Daniel R.
name: Yao, Wang
name: Xiao, Di
name: Cao, Ting
name: Xu, Xiaodong
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Excitons, Coulomb-bound electron-hole pairs, play a fundamental role in both optical excitation and correlated phenomena in solids. When an exciton interacts with other quasi-particles, few- and many-body excited states, such as trions, exciton Fermi-polarons, Mahan excitons can appear. Here, we report a new interaction between exciton and charges enabled by unusual quantum confinement in 2D moiré superlattices, which results in novel exciton many-body ground states composed of moiré excitons and correlated electron lattices. Unique to H-stacked (or 60o-twisted) WS2/WSe2 heterobilayer, we found that the interlayer atomic registry and moiré structural reconstruction leads to an interlayer moiré exciton (IME) whose hole in one layer is surrounded by its partner electron's wavefunction spread among three adjacent moiré traps in the other layer. This 3D excitonic structure can enable large in-plane electrical quadrupole moments in addition to the vertical dipole. Upon doping, the electric quadrupole facilitates the binding of IME to the charges in neighboring moiré cells, forming an intercell charged exciton complex. The exciton complex is unveiled by the IME photoluminescence energy jumps when the electron lattices form at both fractional and integer-filled moiré minibands, with replica-like spectral features between successive integer moiré fillings. Our work provides the framework in understanding and engineering emergent exciton many-body states in correlated moiré charge orders.
Lumped finite element method for reaction-diffusion systems on compact surfaces
Creators: name: Frittelli, Massimo
name: Madzvamuse, Anotida
name: Sgura, Ivonne
name: Venkataraman, Chandrasekhar
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N15, 65N30

description: We propose and analyse a novel surface finite element method that preserves the invariant regions of systems of semilinear parabolic equations on closed compact surfaces in $\mathbb{R}^3$ under discretisation. We also provide a fully-discrete scheme by applying the implicit-explicit (IMEX) Euler method in time. We prove the preservation of the invariant rectangles of the continuous problem under spatial and full discretizations. For scalar equations, these results reduce to the well-known discrete maximum principle. Furthermore, we prove optimal error bounds for the semi- and fully-discrete methods, that is the convergence rates are quadratic in the meshsize and linear in the timestep. Numerical experiments are provided to support the theoretical findings. In particular we provide examples in which, in the absence of lumping, the numerical solution violates the invariant region leading to blow-up due to the nature of the kinetics.
description: 34 pages, 5 figures, 4 tables
Applied Lyapunov Stability on Output Tracking Problem for a Class of Discrete-Time Linear Systems
Creators: name: Zakary, Omar
name: Rachik, Mostafa
Publisher: name: arXiv
Year: 2016
Subjects: subject: Systems and Control (eess.SY)
subject: Analysis of PDEs (math.AP)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: The robust tracking and model following problem of linear discrete-time systems is investigated in this paper. An approach to design robust tracking controllers is proposed. The system is controlled to track dynamic inputs generated from a reference model. By using the solution of the Lyapunov equation, the convergence of the tracking error to the origin, is proved. The proposed approach employs linear controllers rather than nonlinear ones. Therefore, the designing method is simple for use and the resulting controller is easy to implement. An application of the proposed approach for a class of perturbed systems is also considered. Finally, numerical examples are given to demonstrate the validity of the results.
On the Accuracy of the Noninteracting Electron Approximation for Vibrationally Coupled Electron Transport
Creators: name: Wang, Haobin
name: Thoss, Michael
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The accuracy of the noninteracting electron approximation is examined for a model of vibrationally coupled electron transport in single molecule junction. In the absence of electronic-vibrational coupling, steady state transport in this model is described exactly by Landauer theory. Including coupling, both electronic-vibrational and vibrationally induced electron-electron correlation effects may contribute to the real time quantum dynamics. Using the multilayer multiconfiguration time-dependent Hartree (ML-MCTDH) theory to describe nuclear dynamics exactly while maintaining the noninteracting electron approximation for the electronic dynamics, the correlation effects are analyzed in different physical regimes. It is shown that although the noninteracting electron approximation may be reasonable for describing short time dynamics, it does not give the correct long time limit for certain initial conditions.
description: arXiv admin note: text overlap with arXiv:1103.4945, arXiv:1301.4489