cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The miniJPAS survey: the photometric redshift catalogue
Creators: name: Hernán-Caballero, A.
name: Varela, J.
name: López-Sanjuan, C.
name: Muniesa, D.
name: Civera, T.
name: Chaves-Montero, J.
name: Díaz-García, L. A.
name: Laur, J.
name: Hernández-Monteagudo, C.
name: Abramo, R.
name: Angulo, R.
name: Cristóbal-Hornillos, D.
name: González-Delgado, R. M.
name: Greisel, N.
name: Orsi, A.
name: Queiroz, C.
name: Sobral, D.
name: Tamm, A.
name: Tempel, E.
name: Vázquez-Ramió, H.
name: Alcaniz, J.
name: Benítez, N.
name: Bonoli, S.
name: Carneiro, S.
name: Cenarro, J.
name: Dupke, R.
name: Ederoclite, A.
name: Marín-Frach, A.
name: de Oliveira, C. Mendes
name: Moles, M.
name: Sodr, L.
name: Taylor, K.
name: Cypriano, E. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: MiniJPAS is a ~1 deg^2 imaging survey of the AEGIS field in 60 bands, performed to demonstrate the scientific potential of the upcoming JPAS survey. Full coverage of the 3800-9100 Årange with 54 narrow and 6 broad optical filters allow for extremely accurate photo-z, which applied over 1000s of deg^2 will enable new applications of the photo-z technique such as measurement of baryonic acoustic oscillations. In this paper we describe the method used to obtain the photo-z included in the publicly available miniJPAS catalogue, and characterise the photo-z performance. We build 100 Åresolution photo-spectra from the PSF-corrected forced-aperture photometry. Systematic offsets in the photometry are corrected by applying magnitude shifts obtained through iterative fitting with stellar population synthesis models. We compute photo-z with a customised version of LePhare, using a set of templates optimised for the J-PAS filter-set. We analyse the accuracy of miniJPAS photo-z and their dependence on multiple quantities using a subsample of 5,266 galaxies with spectroscopic redshifts from SDSS and DEEP, that we find to be representative of the whole r<23 miniJPAS sample. Formal uncertainties for the photo-z that are calculated with the δχ^2 method underestimate the actual redshift errors. The odds parameter has the stronger correlation with |Dz|, and accurately reproduces the probability of a redshift outlier (|Dz|>0.03) irrespective of the magnitude, redshift, or spectral type of the sources. We show that the two main summary statistics characterising the photo-z accuracy for a population of galaxies (snmad and η) can be predicted by the distribution of odds in such population, and use this to estimate them for the whole miniJPAS sample. At r<23 there are 17,500 galaxies/deg^2 with valid photo-z estimates, of which 4,200 are expected to have |Dz|<0.003 (abridged).
description: 25 pages, 32 figures, 5 tables, accepted for publication in A&A
The BCS Energy Gap at High Density
Creators: name: Henheik, Joscha
name: Lauritsen, Asbjørn Bækgaard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences
subject: 81Q10, 46N50, 82D55

description: We study the BCS energy gap $Ξ$ in the high-density limit and derive an asymptotic formula, which strongly depends on the strength of the interaction potential $V$ on the Fermi surface. In combination with the recent result by one of us (Math. Phys. Anal. Geom. 25, 3 (2022)) on the critical temperature $T_c$ at high densities, we prove the universality of the ratio of the energy gap and the critical temperature.
description: 20 pages; final version
On the $q$-Enumeration of Barely Set-Valued Tableaux and Plane Partitions
Creators: name: Hopkins, Sam
name: Lazar, Alexander
name: Linusson, Svante
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A15 (Primary) 05A19, 06A07 (Secondary)

description: Barely set-valued tableaux are a variant of Young tableaux in which one box contains two numbers as its entry. It has recently been discovered that there are product formulas enumerating certain classes of barely set-valued tableaux. We give some $q$-analogs of these product formulas by introducing a version of major index for these tableaux. We also give product formulas and $q$-analogs for barely set-valued plane partitions. Many of the results are stated in the generality of $P$-partitions that then specialize to particularly nice formulas for rectangles and minuscule posets. The proofs use several probability distributions on the set of order ideals of a poset, depending on the real parameter $q>0$, which we think could be of independent interest.
description: 34 pages, 6 tables, 3 figures; v2: Rewrote proof outline in Introduction, rewrote proof of Corollary 2.10, several other minor revisions at the recommendation of referees to improve exposition. To appear in European Journal of Combinatorics
Anisotropic Kondo line defect and ODE/IM correspondence
Creators: name: Wu, Jingxiang
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We study the anisotropic Kondo line defects in products of chiral $SU(2)$ WZW models. We propose an ODE/IM correspondence for the anisotropic Kondo problems by considering the four-dimensional Chern Simons theory in the trigonometric case. We verify the claim both by explicit perturbative calculations in the ultraviolet and by exact WKB analysis in the infrared. In doing so, we derived the infrared dynamics of a large class of anisotropic line defects.
description: 34 pages, 5 figures; v2: added references and a discussion on the relation with the transfer matrix; v3: typos fixed
Spectral flatness and the volume of intersections of $p$-ellipsoids
Creators: name: Juhos, Michael
name: Prochno, Joscha
Publisher: name: arXiv
Year: 2021
Subjects: subject: Probability (math.PR)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 52A23, 60F05 (Primary) 46B09, 46B20 (Secondary)

description: Motivated by classical works of Schechtman and Schmuckenschläger on intersections of $\ell_p$-balls and recent ones in information-based complexity relating random sections of ellipsoids and the quality of random information in approximation problems, we study the threshold behavior of the asymptotic volume of intersections of generalized $p$-ellipsoids. The non-critical behavior is determined under a spectral flatness (Wiener entropy) condition on the semi-axes. In order to understand the critical case at the threshold, we prove a central limit theorem for $q$-norms of points sampled uniformly at random from a $p$-ellipsoid, which is obtained under Noether's condition on the semi-axes.
description: 2nd version with extended examples and their proofs
Eudelus mediovittatus
Creators: name: Riedel
name: Pénigot
name: Schwarz
name: Diller
name: Johansson
name: Japoshvili, G.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Eudelus
Eudelus mediovittatus

description: Eudelus mediovittatus (SCHMIEDEKNECHT, 1897), det. Schwarz
M a t e r i a l e x a m i n e d: Trap 2: 1♀ 1-15.vi., 1♀ 29.vi.-13.vii.; trap 4: 1♀ 7-21.ix., 1♀ 21.ix.-5.x.; trap 7: 1♀ 19.x.-3.xi.
D i s t r i b u t i o n: Western Palaearctic, new record for Georgia and the Caucasus region.
description: Published as part of Riedel, Pénigot, Schwarz, Diller, Johansson & Japoshvili, G., 2023, Darwin wasps (Hymenoptera, Ichneumonidae) of the Kintrishi National Park, Sakartvelo (Georgia), with descriptions of six new species, pp. 61-153 in Linzer biologische Beiträge 55 (1) on page 122, DOI: 10.5281/zenodo.10415120
Total Difference Labeling of Regular Infinite Graphs
Creators: name: Benson-Tilsen, Noam
name: Brock, Samuel
name: Faunce, Brandon
name: Kumar, Monish
name: Stein, Noah Dokko
name: Zelinsky, Joshua
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: Given a graph $G$, a \textit{$k$-total difference labeling} of the graph is a total labeling $f$ from the set of edges and vertices to the set $\{1, 2, \cdots k\}$ satisfying that for any edge $\{u,v\}$, $f(\{u,v\})=|f(u)-f(v)|$. If $G$ is a graph, then $χ_{td}(G)$ is the minimum $k$ such that there is a $k$-total difference labeling of $G$ in which no two adjacent labels are identical. We extend prior work on total difference labeling by improving the upper bound on $χ_{td}(K_n)$ and also by proving results concerning infinite regular graphs.
description: 20 pages, submitted to Involve. This version contains some results, in particular, the sections on the sequences OS, E, D, M_i1 and M_i2, the questions about random graphs, and the part on saturated and supersaturated graphs, which are not in the version sent to Involve
Placing the Deep Impact Mission into Context: Two Decades of Observations of 9P/Tempel 1 from McDonald Observatory
Creators: name: Cochran, Anita L.
name: Barker, Edwin S.
name: Caballero, Marcos D.
name: Gyorgey-Ries, Judit
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on low-spectral resolution observations of comet 9P/Tempel 1 from 1983, 1989, 1994 and 2005 using the 2.7m Harlan J. Smith telescope of McDonald Observatory. This comet was the target of NASA's Deep Impact mission and our observations allowed us to characterize the comet prior to the impact. We found that the comet showed a decrease in gas production from 1983 to 2005, with the the decrease being different factors for different species. OH decreased by a factor 2.7, NH by 1.7, CN by 1.6, C$_{3}$ by 1.8, CH by 1.4 and C$_{2}$ by 1.3. Despite the decrease in overall gas production and these slightly different decrease factors, we find that the gas production rates of OH, NH, C$_{3}$, CH and C$_{2}$ ratioed to that of CN were constant over all of the apparitions. We saw no change in the production rate ratios after the impact. We found that the peak gas production occurred about two months prior to perihelion. Comet Tempel 1 is a "normal" comet.
description: Accepted for publication in Icarus. 21 total manuscript pages including 8 tables and 4 figures
The IAC's in-kind contribution to Rubin LSST: 10.4m GTC observing time
Creators: name: Knapen, Johan H.
Publisher: name: Zenodo
Year: 2024

description: Observing time on the 10.4m GTC telescope on La Palma will form part of the in-kind contributions of the Spanish groups, IAC and BCN-MAD, to the Rubin LSST project. In this talk, we will give details on how the community can apply for this observing time, what instruments and modes will be available, and what we think are particular areas of interest. We give examples of the science interests of the IAC staff involved which can serve as inspiration for future proposals for LSST-related observing time. This presentation was delivered during the LSST@Europe6 conference in September 2024 in La Palma, Spain.
Limits on Threshold and "Sommerfeld" Enhancements in Dark Matter Annihilation
Creators: name: Backovic, Mihailo
name: Ralston, John P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We find model-independent upper limits on rates of dark matter annihilation in galactic halos. The Born approximation generally fails, while exotic threshold enhancements akin to "Sommerfeld factors" also turn out to be baseless The most efficient annihilation mechanism involves perturbatively small decay widths that have largely been ignored. Widths that are very small compared to TeV mass scales suffice to effectively saturate unitarity bounds on annihilation rates. Bound state formation in weakly coupled theories produces small effects due to wave function normalizations. Unitarity shows the Sommerfeld factor cannot produce large changes in cross sections, and serves to identify where those approximations break down.
description: 8 pages, 3 figures. Accepted for publication in Phys.Rev.D. No significant changes from V2
Cloning of JNK activation domain and Fas-binding domain of human apoptotic Daxx gene by homologous recombination in yeast
Creators: name: Thawornchai Limjindaporn
name: Siwimon Sawaitbud
name: Janjuree Netsawang
name: Dumrong Mairiang
name: Sasiprapa Khunchai
name: Wiyada Wongwiwat
Publisher: name: Genetics Society of Thailand
Year: 2008
Subjects: cloning, human Daxx, JNK activation domain, Fas-binding domain, yeast

description: 1, 1, Thai Journal of Genetics
Varieties of chord diagrams, braid group cohomology and degeneration of equality conditions
Creators: name: Vassiliev, Victor A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 55R80

description: For any finite-dimensional vector space ${\mathcal F}$ of continuous functions $f:{\mathbb R}^1 \to {\mathbb R}^1$ consider subspaces in ${\mathcal F}$ defined by systems of {\em equality conditions} $f(a_i) = f(b_i)$, where $(a_i, b_i)$, $i=1, \dots, n$, are some pairs of points in ${\mathbb R}^1$. It is proved that if $\dim {\mathcal F} < 2n-I(n)$, where $I(n)$ is the number of ones in the binary notation of $n$, then there necessarily are independent systems of $n$ equality conditions defining the subspaces of codimension greater than $n$ in ${\mathcal F}$. We also prove lower estimates of the sizes of the inevitable drops of the codimensions of these subspaces.
 These estimates are then applied to knot theory (in which systems of equality conditions are known as {\em chord diagrams}). The inevitable presence of complicated non-stable terms in sequences of spectral sequences calculating the cohomology groups of spaces of knots is proved.
 Keywords: Chord diagram, configuration space, characteristic class
สาส์นจากอดีตประธานชมรมพันธุศาสตร์
Creators: name: อาภรณ์รัตน์ รัตนทารส
Publisher: name: Genetics Society of Thailand
Year: 2008
Subjects: สาส์น, อดีตประธาน, ชมรมพันธุศาสตร์

description: 1, 1, Thai Journal of Genetics
Global well-posedness of Vlasov-Poisson-type systems in bounded domains
Creators: name: Cesbron, Ludovic
name: Iacobelli, Mikaela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper we prove global existence of classical solutions to the Vlasov-Poisson and the ionic Vlasov-Poisson models in bounded domains. On the boundary, we consider the specular reflection boundary condition for the Vlasov equation and either homogeneous Dirichlet or Neumann conditions for the Poisson equations.
title: Black Africans in the UK’s experiences of treatment for common mental disorders and their strategies for maintaining their ongoing mental wellbeing
Creators: name: Bojang, F
Publisher: name: London School of Hygiene & Tropical Medicine
Year: 2021

description: In the UK, mental health disorders are responsible for the largest proportion of the total burden of disease. Common mental disorders (CMD) such as depression, anxiety and stress related conditions are the leading cause of sickness absence. The proportion of people with a mental disorder accessing treatment has increased, although it is estimated that c75% of people may not access treatment services. People from White British backgrounds are more likely to receive treatment (13%) compared to BAME groups (7%). The lowest proportion of people receiving treatment are Black ethnic groups compared to their population in England. In order to improve uptake, it is essential to understand what drives engagement with services amongst Black Africans and how they maintain their mental wellbeing. This thesis aims to contribute towards providing a more holistic picture of the pathway to care, treatment and ongoing wellbeing maintenance amongst Black Africans to further inform strategies, service planning and delivery. A qualitative research methodology was adopted; in-depth interviews with sixteen participants were conducted to explore experiences of Black Africans with a CMD. Interviewees were split into four categories based on the theoretical framework used, Kleinman et al., (1978) model of healthcare system and explanatory model of illness. The categories were people with a CMD, family/friends supporting someone with a CMD, mental health professionals and traditional healer/faith leader that support people with a CMD. The findings showed that perceptions of mental illness are key in how people make sense of the symptoms they experience. Stigma and fear of judgement is viewed as being present across the ‘system’ including healthcare, which impacts health seeking behaviour. Motivations for seeking support were based on the need to get ‘fixed’, as people reached a point of being unable to cope on their own or crisis point. Two approaches used to maintain wellbeing are coping strategies learnt through therapy and having a social support network
Radioactive pulse chase experiments concerning the mechanism of entry of Semliki Forest viru
Creators: name: Grossi, Romeo
Publisher: name: University of British Columbia
Year: 2010

description: The mechanism of viral penetration for Semliki Forest Virus into BHK-21 cells was investigated through a series of radioactive pulse-chase experiments. Entry of an enveloped virus such as SF Virus can be visualized to enter host cells both by pinocytosis (viropexis) or by fusion of the viral envelope and plasma membrane. Preliminary experiments were performed to obtain optimum conditions of viral adsorption to host cells. The conditions considered included temperature, time of infection, multiplicity of infection and ionic strength of the inoculum. In subsequent experiments BHK-21 cells were infected one half 35 hour with ³⁵S-Methionine-labeled Semliki Forest Virus. At various time points after removal of unadsorbed ³⁵Met-SF Virus, cells were harvested and fractionated into plasma membrane and endoplasmic reticulum fractions. The fractions were subjected to SDS polyacrylamide gel electrophoresis and analyzed for component proteins of SF Virus. Maximum levels of radioactivity corresponding to the envelope proteins (E₁, E₂ and nucleocapsid protein (NC) were found in the PM fraction at zero minutes of chase. Both E₁, E₂ and NC were found to decline during the chase period (approximately 90% within 60 minutes of chase). On the other hand, high levels of only nucleocapsid protein were observed associated with the endoplasmic reticulum fraction although no general pattern of incorporation was indicated furing the experiment. (There were high levles of NC present in the ER fraction throughout the chase period). The results of these studies are generally inconclusive as they can be rationalized both by the viropexis and fusion mechanisms. The loss of both E₁, E₂ and NC from the PM suggest that viropexis is the mechanism of entry, however, fusion is not eliminated as an alternative since the envelope proteins in the PM may be degraded after internalization of the virus core by host proteases. Although no conclusions have been drawn, this study has demonstrated that radioactive pulse-chase experiments can be performed to augment electron microscopy data concerning the mechanism of viral penetration into animal cells.
Supplementary document for Optimum Design of Aspect Ratio Limited X-ray Zone Plates - 6603780.pdf
Creators: name: Kewish, Cameron
name: Gorelick, Sergey
name: Paganin, David
name: de Jonge, Martin
Publisher: name: Optica Publishing Group
Year: 2024
Subjects: Classical and Physical Optics

description: Supplementary Information
Modelling the VCF from the RSF Expander Kobol
Creators: name: Crespo, Alvaro
Publisher: name: Zenodo
Year: 2024
Subjects: Synthesiser
Voltage-Controlled Filter
Black-box modeling
Virtual analog modeling

description: Since the mid 90s, developers have tried to recreate the sound of analog audio devices through digital devices. The biggest problem is to recreate the non-linearities thatare so characteristic of analog circuits, and give those devices their specific sound.Today, there are 3 main lines of work when it comes to analog circuit modelling.White box modelling tries to recreate an analog circuit by simulating real world components. Wave Digital Filters is an example of this. On the other hand, in black box modelling, the analog circuit is not considered, and neural networks are used to learn and replicate the behaviour of the circuit. Finally, grey box modelling, tries to take advantage of both worlds by combining techniques from white and black modelling.This thesis presents a study on the modelling of the VCF from the Kobol RSF Expander, using black-box techniques. The RSF Kobol Expander is a synthesiser developed in 1979 by the french company RSF. Less than 1000 units were made, but its great sound led to it being used by Hans Zimmer or Depeche Mode amongst others. The VCF is a crucial module when it comes to subtractive synthesis, usually giving synthesisers their specific sound, and the filter in the Kobol is a 24dB low pass filter, with controls for cutoff frequency and resonance. Part of the study will be focused on creating a small dataset, that then will be used to train a state-of-the-art model.
Recall of narrative material in five year olds
Creators: name: White, William B.
Publisher: name: University of British Columbia
Year: 2010

description: The recall performances of two groups (n= 16 in each) of kindergarten children (ages 4-11 to 5-10) who encountered narrative material under two different conditions were compared. The children who enacted the story with puppets while listening to it recalled significantly more story elements and both explicit and implicit information than did children who merely listened to the story narration. This was the case at post tests given 30 seconds and one week after the narrative material was encountered. Alternative interpretation of the results are discussed and suggestions about pedagogical implications and future studies are provided.
Modeling long-period variability in evolved stars for Rubin-LSST
Creators: name: Trabucchi, Michele
name: Pastorelli, Giada
name: Marigo, Paola
name: Girardi, Léo
name: Mazzi, Alessandro
Publisher: name: Zenodo
Year: 2024

description: Low- to intermediate-mass stars evolve to the asymptotic giant branch (AGB) phase during which they display pulsation over months- to years-long time scales as long-period variables (LPVs). This process is crucial to understanding the late evolution and death of these stars, their stellar winds and the resulting pollution of the interstellar medium, as well as their compact remnants and the initial-final mass relation. Our knowledge of LPVs and related phenomena, as well as their astrophysical applications such as measuring stellar distances and ages, will benefit enormously from the LSST program thanks to its long planned duration. The full exploitation of such observations requires solid theoretical grounds. During this talk I will cover a number of recent developments in our work involving the modeling of pulsation in evolved stars and the simulation of variability properties of populations of LPVs, part of our in-kind contribution to Rubin-LSST. I will also discuss a number of parallel projects, related to this topic, that are being carried out among our group and are expected to be of interest for the Rubin community.
Concept Drift Detection with Variable Interaction Networks
Creators: name: Zenisek, Jan
name: Kronberger, Gabriel
name: Wolfartsberger, Josef
name: Wild, Norbert
name: Affenzeller, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: The current development of today's production industry towards seamless sensor-based monitoring is paving the way for concepts such as Predictive Maintenance. By this means, the condition of plants and products in future production lines will be continuously analyzed with the objective to predict any kind of breakdown and trigger preventing actions proactively. Such ambitious predictions are commonly performed with support of machine learning algorithms. In this work, we utilize these algorithms to model complex systems, such as production plants, by focusing on their variable interactions. The core of this contribution is a sliding window based algorithm, designed to detect changes of the identified interactions, which might indicate beginning malfunctions in the context of a monitored production plant. Besides a detailed description of the algorithm, we present results from experiments with a synthetic dynamical system, simulating stable and drifting system behavior.
description: International Conference on Computer Aided Systems Theory, Eurocast 2019, pp. 296-303
Homomesy via Toggleability Statistics
Creators: name: Defant, Colin
name: Hopkins, Sam
name: Poznanović, Svetlana
name: Propp, James
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The rowmotion operator acting on the set of order ideals of a finite poset has been the focus of a significant amount of recent research. One of the major goals has been to exhibit homomesies: statistics that have the same average along every orbit of the action. We systematize a technique for proving that various statistics of interest are homomesic by writing these statistics as linear combinations of "toggleability statistics" (originally introduced by Striker) plus a constant. We show that this technique recaptures most of the known homomesies for the posets on which rowmotion has been most studied. We also show that the technique continues to work in modified contexts. For instance, this technique also yields homomesies for the piecewise-linear and birational extensions of rowmotion; furthermore, we introduce a $q$-analogue of rowmotion and show that the technique yields homomesies for "$q$-rowmotion" as well.
description: 48 pages, 13 figures, 2 tables; forthcoming, Combinatorial Theory
Solvable Stochastic Dealer Models for Financial Markets
Creators: name: Yamada, Kenta
name: Takayasu, Hideki
name: Ito, Takatoshi
name: Takayasu, Misako
Publisher: name: arXiv
Year: 2008
Subjects: subject: Trading and Market Microstructure (q-fin.TR)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: We introduce solvable stochastic dealer models, which can reproduce basic empirical laws of financial markets such as the power law of price change. Starting from the simplest model that is almost equivalent to a Poisson random noise generator, the model becomes fairly realistic by adding only two effects, the self-modulation of transaction intervals and a forecasting tendency, which uses a moving average of the latest market price changes. Based on the present microscopic model of markets, we find a quantitative relation with market potential forces, which has recently been discovered in the study of market price modeling based on random walks.
description: 10 pages, 12 figures, 1 table
Smooth Symbolic Regression: Transformation of Symbolic Regression into a Real-valued Optimization Problem
Creators: name: Pitzer, Erik
name: Kronberger, Gabriel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: The typical methods for symbolic regression produce rather abrupt changes in solution candidates. In this work, we have tried to transform symbolic regression from an optimization problem, with a landscape that is so rugged that typical analysis methods do not produce meaningful results, to one that can be compared to typical and very smooth real-valued problems. While the ruggedness might not interfere with the performance of optimization, it restricts the possibilities of analysis. Here, we have explored different aspects of a transformation and propose a simple procedure to create real-valued optimization problems from symbolic regression problems.
The spectral property of hypergraph coverings
Creators: name: Song, Yi-Min
name: Fan, Yi-Zheng
name: Wang, Yi
name: Tian, Meng-Yu
name: Wan, Jiang-Chao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: Primary 05C65, 15A69, , Secondary 13P15, 14M99

description: Let $H$ be a connected $m$-uniform hypergraph, and let $\mathcal{A}(H)$ be the adjacency tensor of $H$ whose spectrum is simply called the spectrum of $H$. Let $s(H)$ denote the number of eigenvectors of $\mathcal{A}(H)$ associated with the spectral radius, and $c(H)$ denote the number of eigenvalues of $\mathcal{A}(H)$ with modulus equal to the spectral radius, which are respectively called the stabilizing index and cyclic index of $H$. Let $\bar{H}$ be a $k$-fold covering of $H$ which can be obtained from some permutation assignment in the symmetric group $\mathbf{S}_k$ on $H$. In this paper, we first characterize the connectedness of $\bar{H}$ by its incidence graph and the permutation assignment, and then investigate the relationship between the spectral property of $H$ and that of $\bar{H}$. By applying module theory and group representation, if $\bar{H}$ is connected, we prove that $s(H) \mid s(\bar{H})$ and $c(H) \mid c(\bar{H})$. In particular, when $\bar{H}$ is a $2$-fold covering of $H$, if $m$ is even, we show that regardless of multiplicities, the spectrum of $\bar{H}$ contains the spectrum of $H$ and the spectrum of a signed hypergraph with $H$ as underlying hypergraph; if $m$ is odd, we give an explicit formula for $s(\bar{H})$. We also find some differences on the spectral property between hypergraph coverings and graph coverings by examples.
Ballistic Hot Electron Transport in Graphene
Creators: name: Tse, Wang-Kong
name: Hwang, E. H.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically study the inelastic scattering rate and the carrier mean free path for energetic hot electrons in graphene, including both electron-electron and electron-phonon interactions. Taking account of optical phonon emission and electron-electron scattering, we find that the inelastic scattering time $τ\sim 10^{-2}-10^{-1} \mathrm{ps}$ and the mean free path $l \sim 10-10^2 \mathrm{nm}$ for electron densities $n = 10^{12}-10^{13} \mathrm{cm}^{-2}$. In particular, we find that the mean free path exhibits a finite jump at the phonon energy $200 \mathrm{meV}$ due to electron-phonon interaction. Our results are directly applicable to device structures where ballistic transport is relevant with inelastic scattering dominating over elastic scattering.
description: 4 pages
Quasiparticle band structures, spontaneous polarization, and spin-splitting in noncentrosymmetric few-layer and bulk $γ$-GeSe
Creators: name: Kim, Han-gyu
name: Choi, Hyoung Joon
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Group-IV monochalcogenides have attracted much attention due to their potential of ferroelectric and multiferroic properties. Recently, centrosymmetric gamma-phase GeSe in a double-layer honeycomb lattice has been theoretically predicted, but the synthesized gamma-phase GeSe showed a noncentrosymmetric atomic structure, leading to the possibility of ferroelectricity and spin-splitting. Here, we study the quasiparticle band structures, spontaneous polarization, and spin-splitting in noncentrosymmetric gamma-GeSe using density functional theory and GW calculations. Our results show that noncentrosymmetric few-layer and bulk gamma-GeSe have semiconducting band structures with indirect band gaps, which depend almost linearly on the reciprocal of the number of layers. Spontaneous polarization occurs due to a small charge transfer between the layers, which increases with compressive strain, and ferroelectric switching can be achieved by an interlayer translation with a small energy barrier. Spin-splitting is found to be more significant at the highest valence band than at the lowest conduction band. Our results provide insights into the fundamental electronic properties of a layered ferroelectric semiconductor applicable to devices with ferroelectric/nonferroelectric junctions.
description: 9 pages, 8 figures, 2 tables
The "tz'u" of Ouyang Hsiu
Creators: name: Yu, Teresa Yee-Wah
Publisher: name: University of British Columbia
Year: 2010

description: Ouyang Hsiu is well-known as a historian and a prose writer. His accomplishment as a "shih" poet has also been noted and confirmed. His "tz'u", however, remains relatively neglected. The object of this thesis is to introduce the "tz'u" of Ouyang Hsiu, to examine the qualities of these works, and to evaluate their significance in the history of "tz'u" development. Since biographical information on Ouyang Hsiu is readily available in English, I have provided in the introduction only a brief summary of Ouyang's life and his various achievements. Apart from 54 poems which are also attributed to other Sung poets, the authenticity of 73 "tz'u" (about one-third of his total corpus) in Ouyang's collection has been a question of doubt and heated dispute. In Chapter I, the different editions of Ouyang Hsiu's "tz'u" are mentioned and compared. The historical, literary and biographical factors which surround the suspicion of fabrication are presented and analysed. Chapter II is a selection of 43 "tz'u" by Ouyang Hsiu, translated and followed by annotations. This selection presents a spectrum of the various styles of Ouyang Hsiu's "tz'u". It is intended to give the readers a personal experience of the poet's works before their discussion. Chapter III is the critical study. Since much work has been done in English on the subject of "tz'u" as a genre, I have only given cursory-information on the background of "tz'u" and its development prior to Ouyang's time. The poems are classified into four major groups for discussion: "tz'u" which are typical of the "tz'u" tradition; "tz'u" which are written mainly for self-expression; "tz'u" composed strictly for entertainment; and, lastly, the 73 "tz'u" of doubtful authorship. In each case, I have contrasted Ouyang's "tz'u" with the works of other poets. I have also compared his "tz'u" with his "shih" and prose works. If the beauty of a poem is better felt by reliving the poet's creative experience than by tearing its ingredients apart for inspection, this is particularly the case with Ouyang's works. Since he excels more in artistic expression than technical innovations, I have concentrated this study mainly on interpreting his works and relating my own feelings about them. But I have also included a general survey of the technical aspects of his "tz'u".
Dar la palabra a las PPL
Creators: name: Suing, Abel
Publisher: name: Zenodo
Year: 2021
Subjects: Seguridad
Ecuador
Derechos
Humanos
Libertad
Crisis
Cárcel
Diálogo
Sociedad
Universidad

description: Publicación en la sección de opinión del diario digital hora 32 https://hora32.com.ec/ que se edita en Loja (Ecuador).
How cold is Dark Matter? Constraints from Milky Way Satellites
Creators: name: Maccio', Andrea V.
name: Fontanot, Fabio
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We test the luminosity function of Milky Way satellites as a constraint for the nature of Dark Matter particles. We perform dissipationless high-resolution N-body simulations of the evolution of Galaxy-sized halo in the standard Cold Dark Matter (CDM) model and in four Warm Dark Matter (WDM) scenarios, with a different choice for the WDM particle mass (m_w). We then combine the results of the numerical simulations with semi-analytic models for galaxy formation, to infer the properties of the satellite population. Quite surprisingly we find that even WDM models with relatively low m_w values (2-5 keV) are able to reproduce the observed abundance of ultra faint (Mv
description: 6 pages, 5 figures. Introduction improved, references added. Accepted for publication on MNRAS Letters
Kinematic dynamos in triaxial ellipsoids
Creators: name: Vidal, Jérémie
name: Cébron, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Fluid Dynamics (physics.flu-dyn)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Planetary magnetic fields are generated by motions of electrically conducting fluids in their interiors. The dynamo problem has thus received much attention in spherical geometries, even though planetary bodies are non-spherical. To go beyond the spherical assumption, we develop an algorithm that exploits a fully spectral description of the magnetic field in triaxial ellipsoids to solve the induction equation with local boundary conditions (i.e. pseudo-vacuum or perfectly conducting boundaries). We use the method to compute the free-decay magnetic modes and to solve the kinematic dynamo problem for prescribed flows. The new method is thoroughly compared with analytical solutions and standard finite-element computations, which are also used to model an insulating exterior. We obtain dynamo magnetic fields at low magnetic Reynolds numbers in ellipsoids, which could be used as simple benchmarks for future dynamo studies in such geometries. We finally discuss how the magnetic boundary conditions can modify the dynamo onset, showing that a perfectly conducting boundary can strongly weaken dynamo action, whereas pseudo-vacuum and insulating boundaries often give similar results.
description: 20 pages, 10 figures. Published onlined 11 August 2021 in PRSA
"An effective two dimensionality" cases bring a new hope to the Kaluza-Klein[like] theories
Creators: name: Lukman, D.
name: Borstnik, N. S. Mankoc
name: Nielsen, H. B.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: One step towards realistic Kaluza-Klein[like] theories and a loop hole through the Witten's "no-go theorem" is presented for cases which we call an effective two dimensionality cases: In $d=2$ the equations of motion following from the action with the linear curvature leave spin connections and zweibeins undetermined. We present the case of a spinor in $d=(1+5)$ compactified on a formally infinite disc with the zweibein which makes a disc curved on an almost $S^2$ and with the spin connection field which allows on such a sphere only one massless normalizable spinor state of a particular charge, which couples the spinor chirally to the corresponding Kaluza-Klein gauge field. We assume no external gauge fields. The masslessness of a spinor is achieved by the choice of a spin connection field (which breaks parity), the zweibein and the normalizability condition for spinor states, which guarantee a discrete spectrum forming the complete basis. We discuss the meaning of the hole, which manifests the noncompactness of the space.
description: 26 pages, 1 figure, an addition which helps to clarify the assumptions and their consequences (the discreteness of spectrum, the massless solution of one handedness,..)
Learned Provability Likelihood for Tactical Search
Creators: name: Gauthier, Thibault
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: I.2.3

description: We present a method to estimate the provability of a mathematical formula. We adapt the tactical theorem prover TacticToe to factor in these estimations. Experiments over the HOL4 library show an increase in the number of theorems re-proven by TacticToe thanks to this additional guidance. This amelioration in performance together with concurrent updates to the TacticToe framework lead to an improved user experience.
description: In Proceedings SCSS 2021, arXiv:2109.02501
Phonons and the coherence scale of models of heavy fermions
Creators: name: Raczkowski, M.
name: Zhang, P.
name: Assaad, F. F.
name: Pruschke, T.
name: Jarrell, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We consider models of heavy fermions in the strong coupling or local moment limit and include phonon degrees of freedom on the conduction electrons. Due to the large mass or low coherence temperature of the heavy fermion state, it is shown that such a regime is dominated by vertex corrections which leads to the complete failure of the Migdal theorem. Even at weak electron-phonon couplings, binding of the conduction electrons competes with the Kondo effect and substantially reduces the coherence temperature, ultimately leading to the Kondo breakdown. Those results are obtained using a combination of the slave boson method and Migdal-Eliashberg approximation as well as the dynamical mean-field theory approximation.
description: 13 pages, 19 figures; added Ref.7 and comment on the scenario in which phonons couple to the f orbitals
Site symmetry and crystal symmetry: a spherical tensor analysis
Creators: name: Brouder, Christian
name: Juhin, Amélie
name: Bordage, Amélie
name: Arrio, Marie-Anne
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The relation between the properties of a specific crystallographic site and the properties of the full crystal is discussed by using spherical tensors. The concept of spherical tensors is introduced and the way it transforms under the symmetry operations of the site and from site to site is described in detail. The law of spherical tensor coupling is given and illustrated with the example of the electric dipole and quadrupole transitions in x-ray absorption spectroscopy. The main application of the formalism is the reduction of computation time in the calculation of the properties of crystals by band structure methods. The general approach is illustrated by the examples of substitutional chromium in spinel and substitutional vanadium in garnet.
description: 27 pages, 3 figures
Note on a non-critical holographic model with a magnetic field
Creators: name: Cui, Sheng-liang
name: Gao, Yi-hong
name: Seo, Yunseok
name: Sin, Sang-jin
name: Xu, Wei-shui
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a noncritical holographic model constructed from an intersecting brane configuration D4/$\bar{\rm{D4}}$-D4 with an external magnetic field. We investigate the influences of this magnetic field on strongly coupled dynamics by the gauge/gravity correspondence.
description: 18 pages, references added and typos revised
Correlation of Horizons and Black Hole Thermodynamics
Creators: name: Azarnia, Sanam
name: Hashemi, S. Sedigheh
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: For black holes with more than one horizon, the existence of a global temperature is not fully understood. This can affect the thermodynamics of these black holes to be unclear. In this paper, using the method of quantum tunneling, we find a global temperature for asymptotically AdS_3 multi-horizon black holes appeared in three dimensional quasitopological gravities. We also find a global temperature for the asymptotically warped AdS3 black holes. In all of the cases the global temperature differs from the conventional Hawking temperature
description: 11 pages
Properties of Light Flavour Baryons in Hypercentral quark model
Creators: name: Thakkar, Kaushal
name: Patel, Bhavin
name: Majethiya, Ajay
name: Vinodkumar, P. C.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The light flavour baryons are studied within the quark model using the hyper central description of the three-body system. The confinement potential is assumed as hypercentral coulomb plus power potential ($hCPP_ν$) with power index $ν$. The masses and magnetic moments of light flavour baryons are computed for different power index, $ν$ starting from 0.5 to 1.5. The predicted masses and magnetic moments are found to attain a saturated value with respect to variation in $ν$ beyond the power index $ν>$ 1.0. Further we computed transition magnetic moments and radiative decay width of light flavour baryons. The results are in good agreement with known experimental as well as other theoretical models.
description: Accepted in Pramana J. of Physics
On foundations of quantum physics
Creators: name: Solov'ev, Evgeni A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Some aspects of the interpretation of quantum theory are discussed. It is emphasized that quantum theory is formulated in the Cartesian coordinate system; in other coordinates the result obtained with the help of the Hamiltonian formalism and commutator relations between 'canonically conjugated' coordinate and momentum operators leads to a wrong version of quantum mechanics. The origin of time is analyzed in detail by the example of atomic collision theory. It is shown that for a closed system like the three-body (two nuclei + electron) time-dependent Schroedinger equation has no physical meaning since in the high impact energy limit it transforms into an equation with two independent time-like variables; the time appears in the stationary Schroedinger equation as a result of extraction of a classical subsystem (two nuclei) from a closed three-body system. Following the Einstein-Rozen-Podolsky experiment and Bell's inequality the wave function is interpreted as an actual field of information in the elementary form. The relation between physics and mathematics is also discussed.
description: This article is extended version of paper: Solov'ev, E.A.: Phys.At.Nuc. v. 72, 853 (2009)
The parabolic Sturmian-function basis representation of the six-dimensional Coulomb Green's function
Creators: name: Zaytsev, S. A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The square integrable basis set representation of the resolvent of the asymptotic three-body Coulomb wave operator in parabolic coordinates is obtained. The resulting six-dimensional Green's function matrix is expressed as a convolution integral over separation constants.
description: 14 pages, 2 figures
E-Cyclist: Implementation of an Efficient Validation of FOLID Cyclic Induction Reasoning
Creators: name: Stratulat, Sorin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.4.1

description: Checking the soundness of cyclic induction reasoning for first-order logic with inductive definitions (FOLID) is decidable but the standard checking method is based on an exponential complement operation for Büchi automata. Recently, we introduced a polynomial checking method whose most expensive steps recall the comparisons done with multiset path orderings. We describe the implementation of our method in the Cyclist prover. Referred to as E-Cyclist, it successfully checked all the proofs included in the original distribution of Cyclist. Heuristics have been devised to automatically define, from the analysis of the proof derivations, the trace-based ordering measures that guarantee the soundness property.
description: In Proceedings SCSS 2021, arXiv:2109.02501