cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A race against the clock: Constraining the timing of cometary bombardment relative to Earth's growth
Creators: name: Joiret, Sarah
name: Raymond, Sean N.
name: Avice, Guillaume
name: Clement, Matthew S.
name: Deienno, Rogerio
name: Nesvorný, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Comets are considered a potential source of inner solar system volatiles, but the timing of this delivery relative to that of Earth's accretion is still poorly understood. Measurements of xenon isotopes in comet 67P/Churyumov-Gerasimenko revealed that comets partly contributed to the Earth's atmosphere. However, there is no conclusive evidence of a significant cometary component in the Earth's mantle. These geochemical constraints would favour a contribution of comets mainly occurring after the last stages of Earth's formation. Here, we evaluate whether dynamical simulations satisfy these constraints in the context of an Early Instability model. We perform dynamical simulations of the solar system, calculate the probability of collision between comets and Earth analogs component embryos through time and estimate the total cometary mass accreted in Earth analogs as a function of time. While our results are in excellent agreement with geochemical constraints, we also demonstrate that the contribution of comets on Earth might have been delayed with respect to the timing of the instability, due to a stochastic component of the bombardment. More importantly, we show that it is possible that enough cometary mass has been brought to Earth after it had finished forming so that the xenon constraint is not necessarily in conflict with an Early Instability scenario. However, it appears very likely that a few comets were delivered to Earth early in its accretion history, thus contributing to the mantle's budget. Finally, we compare the delivery of cometary material on Earth to Venus and Mars. These results emphasize the stochastic nature of the cometary bombardment in the inner solar system.
description: 26 pages, 12 figures
Electroweak baryogenesis from a dark sector
Creators: name: Cline, James M.
name: Kainulainen, Kimmo
name: Tucker-Smith, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Adding an extra singlet scalar $S$ to the Higgs sector can provide a barrier at tree level between a false vacuum with restored electroweak symmetry and the true one. This has been demonstrated to readily give a strong phase transition as required for electroweak baryogenesis. We show that with the addition of a fermionic dark matter particle $χ$ coupling to $S$, a simple UV-complete model can realize successful electroweak baryogenesis. The dark matter gets a CP asymmetry that is transferred to the standard model through a $CP\ portal\ interaction$, which we take to be a coupling of $χ$ to $τ$ leptons and an inert Higgs doublet. The CP asymmetry induced in left-handed $τ$ leptons biases sphalerons to produce the baryon asymmetry. The model has promising discovery potential at the LHC, while robustly providing a large enough baryon asymmetry and correct dark matter relic density with reasonable values of the couplings.
description: 16 pages, 15 figures; v2: added references; v3: corrected eq.7, improved treatment of nucleation and wall velocity, added section on indirect detection; published version
The diverse pathways of social inequality transmission in the neighbourhood
Creators: name: Troost, Agata
Publisher: name: A+BE | Architecture and the Built Environment
Year: 2023

description: This PhD thesis aims to move beyond the standard treatments of neighbourhoods in research on spatially transmitted inequality. The research questions explored in the four empirical chapters of the thesis delve into under-researched elements of sociospatial inequality transmission in neighbourhoods. The thesis uses statistical models to analyse register and survey data, and relies on different operationalisations of neighbourhoods: administrative and bespoke. Chapter 2 finds that controlling for selection reduces neighbourhood effects compared to when only individual characteristics are controlled for, and provides insight into the differing patterns of neighbourhood selection and effects in Dutch regional housing markets. Chapter 3 shows that the strength of the observed relationship between neighbourhood poverty and educational attainment is dependent on how exposure is measured and conceptualized, and highlights the importance of choosing the temporal aspects of individual neighbourhood histories based on the theoretical scope of a study. Chapter 4 finds that in the Netherlands, the positive effect of neighbourhood affluence on educational attainment is stronger than the negative effect of neighbourhood poverty. Chapter 5 addresses the discrepancy between the registered data-based measurements of neighbourhood characteristics, specifically the share of neighbours with foreign background and low income, and the individual perceptions of those characteristics by the inhabitants of the neighbourhood. The findings of the thesis confirm the validity of treating the neighbourhood as a social setting that interacts with the micro and macro contexts, rather than simply as an aggregated characteristic which can be controlled for.
description: A+BE | Architecture and the Built Environment, No. 10 (2023): The diverse pathways of social inequality transmission in the neighbourhood
title: Χρήση του εργαλείου sysmon για τον εντοπισμό επιθέσεων εσωτερικής μετακίνησης ενός επιτιθέμενου
title: Application of the sysmon tool for the identification of internal lateral movements of an attacker
titleType: AlternativeTitle
Creators: name: Δράκος, Μιχαήλ
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2022
Subjects: subject: Sysmon
subject: Ανίχνευση
subject: Εσωτερική μετακίνηση

description: Μέσα από την παρούσα διπλωματική διατριβή, ο αναγνώστης μπορεί να ενημερωθεί για τη χρήση, το τρόπο λειτουργίας και τις δυνατότητες του εργαλείου Sysmon καθώς επίσης παρουσιάζεται ένας τρόπος εγκατάστασης και παραμετροποίησης του εργαλείου. Ο αναγνώστης ενημερώνεται ταυτόχρονα για τους τρόπους με τους οποίους μπορούν να εντοπιστούν επιθέσεις εσωτερικής μετακίνησης ενός επιτιθέμενου μέσα σε ένα δίκτυο με Windows Domain. Επιπλέον κατά τη διάρκεια της συγκεκριμένης αναφοράς γίνεται μια αναλυτική παρουσίαση και ανάλυση όσο αναφορά στις μεθοδολογίες, στις τεχνικές και στα εργαλεία που χρησιμοποιεί ένας επιτιθέμενος με σκοπό να μετακινηθεί εσωτερικά (Lateral Movement) σε ένα δίκτυο με Windows Domain, έχοντας ως τελικό σκοπό να γίνει domain admin είτε να υποκλέψει δεδομένα.
On the Origin of Sub-Subgiant Stars II: Binary Mass Transfer, Envelope Stripping, and Magnetic Activity
Creators: name: Leiner, Emily
name: Mathieu, Robert D.
name: Geller, Aaron M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Sub-subgiant stars (SSGs) lie to the red of the main-sequence and fainter than the red giant branch in cluster color-magnitude diagrams (CMDs), a region not easily populated by standard stellar evolution pathways. While there has been speculation on what mechanisms may create these unusual stars, no well-developed theory exists to explain their origins. Here we discuss three hypotheses of SSG formation: (1) mass transfer in a binary system, (2) stripping of a subgiant's envelope, perhaps during a dynamical encounter, and (3) reduced luminosity due to magnetic fields that lower convective efficiency and produce large star spots. Using the stellar evolution code MESA, we develop evolutionary tracks for each of these hypotheses, and compare the expected stellar and orbital properties of these models with six known SSGs in the two open clusters M67 and NGC 6791. All three of these mechanisms can create stars or binary systems in the SSG CMD domain. We also calculate the frequency with which each of these mechanisms may create SSG systems, and find that the magnetic field hypothesis is expected to create SSGs with the highest frequency in open clusters. Mass transfer and envelope stripping have lower expected formation frequencies, but may nevertheless create occasional SSGs in open clusters. They may also be important mechanisms to create SSGs in higher mass globular clusters.
description: 17 pages, 8 Figure, accepted to ApJ
Developing Privacy Incident Responses to Combat Information Warfare
Creators: name: McElroy, Sean
name: McKee, Lisa
Publisher: name: Zenodo
Year: 2023
Subjects: incident response
data privacy
information warfare
disinformation

description: Violations of privacy harm real people, and as nation-state actors grow their information warfare capabilities, civilians suffer these harms as part of coordinated and targeted actions on objectives. When privacy harms manifest, they allow threat actors to injure data subjects by weaponizing their information to harm individuals, communities, and societies. These attacks injure civilians as the confidence of legitimate authorities, institutions, and defences is eroded, and consequences may impact national security. Distinct from cybersecurity, privacy depends upon confidentiality, integrity, and availability but encompasses a unique set of concerns. Whereas security incident response has an established practice and research history, approaches to privacy incident response, such as unauthorized disclosure, are not well researched or documented in academic literature in the unique context of privacy. By mapping privacy harm to techniques and tactics, a cohesive framework emerges to distinguish tailored mitigation strategies for each. This paper proposes a conceptual model and classification framework for privacy-related harms, tactics, techniques, and mitigation strategies to address sophisticated privacy threat actors. Using this model and framework, contingency planners can develop privacy incident response strategies to defend against the privacy harms of information warfare.
Deriving Probability Density Functions from Probabilistic Functional Programs
Creators: name: Bhat, Sooraj
name: Borgström, Johannes
name: Gordon, Andrew D.
name: Russo, Claudio
Publisher: name: arXiv
Year: 2017
Subjects: subject: Programming Languages (cs.PL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: F.3.2; G.3; I.2.5

description: The probability density function of a probability distribution is a fundamental concept in probability theory and a key ingredient in various widely used machine learning methods. However, the necessary framework for compiling probabilistic functional programs to density functions has only recently been developed. In this work, we present a density compiler for a probabilistic language with failure and both discrete and continuous distributions, and provide a proof of its soundness. The compiler greatly reduces the development effort of domain experts, which we demonstrate by solving inference problems from various scientific applications, such as modelling the global carbon cycle, using a standard Markov chain Monte Carlo framework.
Spin memory effect for compact binaries in the post-Newtonian approximation
Creators: name: Nichols, David A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The spin memory effect is a recently predicted relativistic phenomenon in asymptotically flat spacetimes that become nonradiative infinitely far in the past and future. Between these early and late times, the magnetic-parity part of the time integral of the gravitational-wave strain can undergo a nonzero change; this difference is the spin memory effect. Families of freely falling observers around an isolated source can measure this effect, in principle, and fluxes of angular momentum per unit solid angle (or changes in superspin charges) generate the effect. The spin memory effect had not been computed explicitly for astrophysical sources of gravitational waves, such as compact binaries. In this paper, we compute the spin memory in terms of a set of radiative multipole moments of the gravitational-wave strain. The result of this calculation allows us to establish the following results about the spin memory: (i) We find that the accumulation of the spin memory behaves in a qualitatively different way from that of the displacement memory effect for nonspinning, quasicircular compact binaries in the post-Newtonian approximation: the spin memory undergoes a large secular growth over the duration of the inspiral, whereas for the displacement effect this increase is small. (ii) The rate at which the spin memory grows is equivalent to a nonlinear, but nonoscillatory and nonhereditary effect in the gravitational waveform that had been previously calculated for nonspinning, quasicircular compact binaries. (iii) This rate of build-up of the spin memory could potentially be detected by future gravitational-wave detectors by carefully combining the measured waveforms from hundreds of gravitational-wave detections of compact binaries.
description: 17 pages, 2 figures, 1 table; v2: minor corrections and clarifications; v3: updated to match the published version
Supplementary document for Resolvent expansion for discrete non-Hermitian resonant systems - 6086925.pdf
Creators: name: Simonson, Lucas
name: Ozdemir, Sahin
name: Busch, Kurt
name: El-Ganainy, Ramy
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Additional detail on the derivations of the main results
Northern sky Galactic Cosmic Ray anisotropy between 10-1000 TeV with the Tibet Air Shower Array
Creators: name: Gamma Collaboration
name: Amenomori, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report the analysis of the $10-1000$ TeV large-scale sidereal anisotropy of Galactic cosmic rays (GCRs) with the data collected by the Tibet Air Shower Array from October, 1995 to February, 2010. In this analysis, we improve the energy estimate and extend the declination range down to $-30^{\circ}$. We find that the anisotropy maps above 100 TeV are distinct from that at multi-TeV band. The so-called "tail-in" and "loss-cone" features identified at low energies get less significant and a new component appears at $\sim100$ TeV. The spatial distribution of the GCR intensity with an excess (7.2$σ$ pre-trial, 5.2$σ$ post-trial) and a deficit ($-5.8σ$ pre-trial) are observed in the 300 TeV anisotropy map, in a good agreement with IceCube's results at 400 TeV. Combining the Tibet results in the northern sky with IceCube's results in the southern sky, we establish a full-sky picture of the anisotropy in hundreds of TeV band. We further find that the amplitude of the first order anisotropy increases sharply above $\sim100$ TeV, indicating a new component of the anisotropy. All these results may shed new light on understanding the origin and propagation of GCRs.
title: Negativity in Painting
Creators: name: Frost, Lola Audrey
Publisher: name: Goldsmiths, University of London
Year: 2007

description: This combined theory/practice research project investigates and mobilises negativity in painting. The written thesis does so by developing an interpretive method which identifies two de-subjectifying signifying processes in paintings, called poetic ambiguity and sublime irresolution. The thesis proposes that these signifying processes structure an aesthetic practicing of negativity which disaggregates meaning. An investigation of philosophical texts (by Kristeva, Merleau-Ponty, Kant, Nietzsche, Adorno, Lyotard, Derrida and Irigaray) and art historical interpretations (by Koerner and Marin) of certain poetic and sublime paintings, services an understanding of these sublime and poetic practices of negativity. The thesis explores the tensions and correspondences between negative aesthetics and philosophical deconstruction. It explores the irreducible inter-relation between experiencing aesthetic negativity in painting and understanding the discursive implications of practices of negativity. Such a dialectics enables a critique of philosophical deconstruction which degrades the autonomy of aesthetic experience, and of the feminist deconstructions of ecriture feminine which conflate textual practices of negativity with a politics of the feminine. This research project is a contribution to a revival of negative aesthetics after the impact of philosophical deconstruction. As an applied investigation into aesthetic negativity, this thesis explores how selected paintings by C.D. Friedrich, Nicholas Poussin, J.M.W.Turner and Mark Rothko invite poetic or sublime practices of negativity. These insights are extended into a discussion of how the contemporary painting and visual art practices of Glenn Brown, Jeremy Wafer, Rosa Lee and Therese Oulton, invite a double register of interpretation. This doubling records the experiential impact of aesthetic practices of sublime and poetic negativity, and an understanding of the deconstructive significance of these painting practices. I suggest that my own paintings likewise engage a dialectical relation between the negativity of sublime experience, and the positivity of understanding their discursive and political significance.
A judgmental analysis of linear logic
Creators: name: Bor-Yuh Evan Chang
name: Kaustuv  Chaudhuri
name: Pfenning, Frank
Publisher: name: Carnegie Mellon University
Year: 2003
Subjects: subject: 89999 Information and Computing Sciences not elsewhere classified
subject: FOS: Computer and information sciences

description: We reexamine the foundations of linear logic, developing a system of natural deduction following Martin-Löf’s separation of judgments from propositions. Our construction yields a clean and elegant formulation that accounts for a rich set of multiplicative, additive, and exponential connectives, extending dual intuitionistic linear logic but differing from both classical linear logic and Hyland and de Paiva’s full intuitionistic linear logic. We also provide a corresponding sequent calculus that admits a simple proof of the admissibility of cut by a single structural induction. Finally, we show how to interpret classical linear logic (with or without the MIX rule) in our system, employing a form of double-negation translation.
Black holes will break up solitons and white holes may destroy them
Creators: name: Akbar, Fiki T.
name: Gunara, Bobby E.
name: Susanto, Hadi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Quantum Gases (cond-mat.quant-gas)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We consider a quantum analogue of black holes and white holes using Bose-Einstein condensates. The model is described by the nonlinear Schrodinger equation with a 'stream flow' potential, that induces a spatial translation to standing waves. We then mainly consider the dynamics of dark solitons in a black hole or white hole flow analogue and their interactions with the event horizon. A reduced equation describing the position of the dark solitons was obtained using variational method. Through numerical computations and comparisons with the analytical approximation we show that solitons can pass through black hole horizons even though they will break up into several solitons after the collision. In the interaction with a white hole horizon, we show that solitons either pass through the horizon or will be destroyed by it.
description: To appear in Physics Letters A
Text Entry Performance and Situation Awareness of a Joint Optical See-Through Head-Mounted Display and Smartphone System
Creators: name: Grubert, Jens
name: Witzani, Lukas
name: Otte, Alexander
name: Gesslein, Travis
name: Kranz, Matthias
name: Kristensson, Per Ola
Publisher: name: arXiv
Year: 2023
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Optical see-through head-mounted displays (OST HMDs) are a popular output medium for mobile Augmented Reality (AR) applications. To date, they lack efficient text entry techniques. Smartphones are a major text entry medium in mobile contexts but attentional demands can contribute to accidents while typing on the go. Mobile multi-display ecologies, such as combined OST HMD-smartphone systems, promise performance and situation awareness benefits over single-device use. We study the joint performance of text entry on mobile phones with text output on optical see-through head-mounted displays. A series of five experiments with a total of 86 participants indicate that, as of today, the challenges in such a joint interactive system outweigh the potential benefits.
description: To appear in IEEE Transactions on Visualization and Computer Graphics On page(s): 1-17 Print ISSN: 1077-2626 Online ISSN: 1077-2626
title: Are Temporary Oil Supply Shocks Real?
Creators: name: Brannlund, Johan
name: Dunbar, Geoffrey
name: Ellwanger, Reinhard
Publisher: name: Bank of Canada
Year: 2022

description: Hurricanes disrupt oil production in the Gulf of Mexico because producers shut in oil platforms
to safeguard lives and prevent damage. We examine the effects of these temporary oil supply
shocks on real economic activity in the United States. We find no evidence that temporary oil
supply shocks affect state-level employment or indirectly affect industrial production in sectors
not immediately related to oil production. We find that the temporary oil supply shocks have
local, temporary price effects—mainly on gasoline prices—and that broader consumer price
index inflation is also temporarily affected. In addition, we find no effect on imports, exports,
exchange rates or the import price of oil. Our results suggest that oil reserves held by US
refineries are largely sufficient to absorb any temporary disruptions to production.
description: Les ouragans perturbent la production de pétrole dans le golfe du Mexique, car les producteurs
ferment les plateformes pétrolières pour protéger des vies et éviter les dommages. Nous
examinons les effets de ces chocs temporaires d’approvisionnement en pétrole sur l’activité
économique réelle aux États-Unis. D’après notre étude, rien n’indique que ces chocs influent
sur l’emploi au niveau des États ou se répercutent indirectement sur la production industrielle
de secteurs qui ne sont pas étroitement liés à la production pétrolière. Nous constatons qu’ils
ont des effets locaux et passagers sur les prix – principalement ceux de l’essence – ainsi qu’une
incidence temporaire sur l’inflation mesurée par l’indice des prix à la consommation global. De
plus, nous n’observons aucun effet sur les importations, les exportations, les taux de change
ou les prix à l’importation du pétrole. Nos résultats donnent à penser que les réserves de
pétrole détenues par les raffineries américaines sont largement suffisantes pour absorber toute
perturbation temporaire de la production.
Environmental screening of dark matter haloes in $f(R)$ gravity
Creators: name: Shi, Difu
name: Li, Baojiu
name: Han, Jiaxin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In certain theories of modified gravity, solar system constraints on deviations from general relativity (GR) are satisfied by virtue of a so-called screening mechanism, which enables the theory to revert to GR in regions where the matter density is high or the gravitational potential is deep. In the case of chameleon theories, the screening has two contributions -- self-screening, which is due to the mass of an object itself, and environmental screening, which is caused by the surrounding matter -- which are often entangled, with the second contribution being more crucial for less massive objects. A quantitative understanding of the effect of the environment on the screening can prove critical in observational tests of such theories using systems such as the Local Group and dwarf galaxies, for which the environment may be inferred in various ways. We use the high-resolution {\sc liminality} simulation of Shi et al. (2015) to test the fidelity of different definitions of environment. We find that, although the different ways to define environment in practice do not agree with one another perfectly, they can provide useful guidance, and cross checks about how well a dark matter halo is screened. In addition, the screening of subhaloes in dark matter haloes is primarily determined by the environment, with the subhalo mass playing a minor role, which means that lower-resolution simulations where subhaloes are not well resolved can still be useful for understanding the modification of gravity inside subhaloes.
description: 11 pages, 7 figures, 2 tables. Published in MNRAS after minor correction
Usability of Social Media Technologies: How it affect our Personal Everyday Life? The Millennial Qualitative Research Study
Creators: name: Lee, Christopher M.
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 390405
subject: Educational technology and computing
classificationCode: 390408
subject: Learning analytics
classificationCode: 520505
subject: Social psychology

description: At present, the use of social media technologies towards our personal everyday lives maintains social awareness, and somehow drives through in order to alleviate the progress of ones personality development. It also allows the general public to use these online media platforms in order to create an opening, and by rediscovering several online media communication and networks such as a particular modern news and/or event. In the recent survey conducted by several research scientists and social media experts, about 90 to 95% of the whole population of the millennials (born in the year 1981-1996) on every community and nation believes that using social media technologies in the Philippines, such as Facebook/Meta, Twitter, Instagram, TikTok, and the like can potentially influence the youth of today by encouraging them to post pictures; commenting for whatever local and national controversies; and by simply watching, looking, and listening to any networking profile and leisure related content. And as an adult, we cannot hide the fact that no one prohibits them to use any social media networks, most of our younger ones, because of its visual high demands and unlimited viewing concept. Just like an ordinary TV program or a print ad commercial that everybody can watch into. Because whatever we read, search and listen to, it can make us entertain and satisfy our personal viewing pleasures.
LanSER: Language-Model Supported Speech Emotion Recognition
Creators: name: Gong, Taesik
name: Belanich, Josh
name: Somandepalli, Krishna
name: Nagrani, Arsha
name: Eoff, Brian
name: Jou, Brendan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Sound (cs.SD)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Speech emotion recognition (SER) models typically rely on costly human-labeled data for training, making scaling methods to large speech datasets and nuanced emotion taxonomies difficult. We present LanSER, a method that enables the use of unlabeled data by inferring weak emotion labels via pre-trained large language models through weakly-supervised learning. For inferring weak labels constrained to a taxonomy, we use a textual entailment approach that selects an emotion label with the highest entailment score for a speech transcript extracted via automatic speech recognition. Our experimental results show that models pre-trained on large datasets with this weak supervision outperform other baseline models on standard SER datasets when fine-tuned, and show improved label efficiency. Despite being pre-trained on labels derived only from text, we show that the resulting representations appear to model the prosodic content of speech.
description: Presented at INTERSPEECH 2023
On E-Discretization of Tori of Compact Simple Lie Groups: II
Creators: name: Hrivnák, Jiří
name: Juránek, Michal
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Ten types of discrete Fourier transforms of Weyl orbit functions are developed. Generalizing one-dimensional cosine, sine and exponential, each type of the Weyl orbit function represents an exponential symmetrized with respect to a subgroup of the Weyl group. Fundamental domains of even affine and dual even affine Weyl groups, governing the argument and label symmetries of the even orbit functions, are determined. The discrete orthogonality relations are formulated on finite sets of points from the refinements of the dual weight lattices. Explicit counting formulas for the number of points of the discrete transforms are deduced. Real-valued Hartley orbit functions are introduced and all ten types of the corresponding discrete Hartley transforms are detailed.
description: 26 pages, 6 figures
Azurite: An algebraic geometry based package for finding bases of loop integrals
Creators: name: Georgoudis, Alessandro
name: Larsen, Kasper J.
name: Zhang, Yang
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: For any given Feynman graph, the set of integrals with all possible powers of the propagators spans a vector space of finite dimension. We introduce the package {\sc Azurite} ({\bf A ZUR}ich-bred method for finding master {\bf I}n{\bf TE}grals), which efficiently finds a basis of this vector space. It constructs the needed integration-by-parts (IBP) identities on a set of generalized-unitarity cuts. It is based on syzygy computations and analyses of the symmetries of the involved Feynman diagrams and is powered by the computer algebra systems {\sc Singular} and {\sc Mathematica}. It can moreover analytically calculate the part of the IBP identities that is supported on the cuts.
description: Version 1.1.0 of the package Azurite, with parallel computations. It can be downloaded from https://bitbucket.org/yzhphy/azurite/raw/master/release/Azurite_1.1.0.tar.gz
Silabo de Ingenieria de Metodos 2023 - II
Creators: name: Rivas, Jorge Luis Hilario
Publisher: name: Zenodo
Year: 2023
Subjects: INGENIERIA DE METODOS

description: La naturaleza de esta asignatura corresponde al Área Curricular de Estudios de Especialidad, su carácter es teórico-práctico, cuyo propósito es realizar delicado y minucioso análisis tendiente a eliminar toda actividad innecesaria, y en aquellas que sean necesarias, hallar la mejor y más rápida manera de ejecutarlas. Incluye la normalización del equipo y de las condiciones generales de trabajo. En la actualidad, su uso más frecuente como técnica de aplicación directa está en el diseño de sistemas automatizados, habiéndose constituido, por la economía de esfuerzos (y, por tanto, de recursos), en una de las fases previas al diseño final de procedimientos computarizados. En una forma analítica, la Ingeniería de Métodos es definida como "la técnica que somete cada actividad de una determinada tarea a un delicado y minucioso análisis tendiente a eliminar toda actividad innecesaria, y en aquellas que sean necesarias, hallar la mejor y más rápida manera de ejecutarlas". Incluye la normalización del equipo y de las condiciones generales de trabajo. Esta definición corresponde a la primera de las dos fases que constituyen la Ingeniería de Métodos, conocida como el Estudio de Métodos. En la segunda fase, "se determina, por medio de mediciones muy precisas, el tiempo que requiere un trabajador normal para realizar una tarea ya normalizada". Esta es la Medición del Trabajo. Se desarrollará, durante el semestre académico, conocimientos para el aprovechamiento correcto de los recursos humanos y materiales para llevar a cabo una determinada tarea.
Derivation of Coordinate Descent Algorithms from Optimal Control Theory
Creators: name: Ross, I. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: Machine Learning (cs.LG)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.1.6
subject: 90C25

description: Recently, it was posited that disparate optimization algorithms may be coalesced in terms of a central source emanating from optimal control theory. Here we further this proposition by showing how coordinate descent algorithms may be derived from this emerging new principle. In particular, we show that basic coordinate descent algorithms can be derived using a maximum principle and a collection of max functions as "control" Lyapunov functions. The convergence of the resulting coordinate descent algorithms is thus connected to the controlled dissipation of their corresponding Lyapunov functions. The operational metric for the search vector in all cases is given by the Hessian of the convex objective function.
Understanding cancer complexome using networks, spectral graph theory and multilayer framework
Creators: name: Rai, Aparna
name: Pradhan, Priodyuti
name: Nagraj, Jyothi
name: Lohitesh, K.
name: Chowdhury, Rajdeep
name: Jalan, Sarika
Publisher: name: arXiv
Year: 2017
Subjects: subject: Molecular Networks (q-bio.MN)
subject: FOS: Biological sciences

description: Cancer complexome comprises a heterogeneous and multifactorial milieu that varies in cytology, physiology, signaling mechanisms and response to therapy. The combined framework of network theory and spectral graph theory along with the multilayer anal- ysis provides a comprehensive approach to analyze the proteomic data of seven different cancers, namely, breast, oral, ovarian, cervical, lung, colon and prostate. Our analysis demonstrates that the protein-protein interaction networks of the normal and the cancerous tissues associated with the seven cancers have overall similar structural and spectral properties. However, few of these properties implicate unsystematic changes from the normal to the disease networks depicting difference in the interactions and highlighting changes in the complexity of different cancers. Importantly, analysis of common proteins of all the cancer networks reveals few proteins namely the sensors, which not only occupy significant position in all the layers but also have direct involvement in causing cancer. The prediction and analysis of miRNAs targeting these sensor proteins hint towards the possible role of these proteins in tumorigenesis. This novel approach helps in understanding cancer at the fundamental level and provides a clue to develop promising and nascent concept of single drug therapy for multiple diseases as well as personalized medicine.
description: 25 pages, 6 figures, accepted in scientific reports (in press)
Cold Solar Flares I. Microwave Domain
Creators: name: Lysenko, Alexandra L.
name: White, Stephen M.
name: Zhdanov, Dmitry A.
name: Meshalkina, Nataliia S.
name: Altyntsev, Aleksander T.
name: Motorina, Galina G.
name: Fleishman, Gregory D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We identify a set of ~100 "cold" solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission. This work is a follow up of a previous statistical study of cold flares, which focused on hard X-ray emission to quantify the flare nonthermal component. Here we focus on the microwave emission. The thermal response is represented by the soft X-ray emission measured by the GOES X-ray sensors. We obtain spectral parameters of the flare gyrosynchrotron emission and investigate patterns of the temporal evolution. The main results of the previous statistical study are confirmed: as compared to a "mean" flare, the cold flares have shorter durations, higher spectral peak frequencies, and harder spectral indices above the spectral peak. Nonetheless, there are some cold flares with moderate and low peak frequencies. In a majority of cold flares, we find evidence suggesting the presence of the Razin effect in the microwave spectra, indicative of rather dense flaring loops. We discuss the results in the context of electron acceleration efficiency.
Tunable mode coupling in nano-contact spin torque oscillators
Creators: name: Zhang, Steven S. -L.
name: Iacocca, Ezio
name: Heinonen, Olle
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Recent experiments on spin torque oscillators have revealed interactions between multiple magnetodynamic modes, including mode-coexistence, mode-hopping, and temperature-driven cross-over between modes. Initial multimode theory has indicated that a linear coupling between several dominant modes, arising from the interaction of the subdynamic system with a magnon bath, plays an essential role in the generation of various multimode behaviors, such as mode hopping and mode coexistence. In this work, we derive a set of rate equations to describe the dynamics of coupled magnetodynamic modes in a nano-contact spin torque oscillator. Expressions for both linear and nonlinear coupling terms are obtained, which allow us to analyze the dependence of the coupled dynamic behaviors of modes on external experimental conditions as well as intrinsic magnetic properties. For a minimal two-mode system, we further map the energy and phase difference of the two modes onto a two-dimensional phase space, and demonstrate in the phase portraits, how the manifolds of periodic orbits and fixed points vary with external magnetic field as well as with temperature.
description: 13 pages, 8 figures; 2 figures (Figs.5 & 6) corrected and redrawn; 2 new figures (Figs.7 & 8) added; Accepted by Physical Review Applied
Dextromethorphan - Molecule of the Month February 2024 [Archived version]
Creators: name: May, Paul
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 349999
subject: Other chemical sciences not elsewhere classified

description: This is the Molecule of the Month entry for February 2024 about dextromethorphan. It is a pdf archive version of the HTML webpage.
Diversity of Abundance Patterns of Light Neutron-capture Elements in Very-metal-poor Stars
Creators: name: Aoki, Misa
name: Ishimaru, Yuhri
name: Aoki, Wako
name: Wanajo, Shinya
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We determine the abundances of neutron-capture elements from Sr to Eu for five very-metal-poor stars (-3
description: Accepted for publication in the Astrophysical Journal
Phase field modeling and computer implementation: A review
Creators: name: Zhuang, X.
name: Zhou, S.
name: Huynh, G. D.
name: Areias, P.
name: Rabczuk, T.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: This paper presents an overview of the theories and computer implementation aspects of phase field models (PFM) of fracture. The advantage of PFM over discontinuous approaches to fracture is that PFM can elegantly simulate complicated fracture processes including fracture initiation, propagation, coalescence, and branching by using only a scalar field, the phase field. In addition, fracture is a natural outcome of the simulation and obtained through the solution of an additional differential equation related to the phase field. No extra fracture criteria are needed and an explicit representation of a crack surface as well as complex track crack procedures are avoided in PFM for fracture, which in turn dramatically facilitates the implementation. The PFM is thermodynamically consistent and can be easily extended to multi-physics problem by 'changing' the energy functional accordingly. Besides an overview of different PFMs, we also present comparative numerical benchmark examples to show the capability of PFMs.
Evolution of eccentricity and inclination of hot protoplanets embedded in radiative discs
Creators: name: Eklund, Henrik
name: Masset, Frédéric S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We study the evolution of the eccentricity and inclination of protoplanetary embryos and low-mass protoplanets (from a fraction of an Earth mass to a few Earth masses) embedded in a protoplanetary disc, by means of three dimensional hydrodynamics calculations with radiative transfer in the diffusion limit. When the protoplanets radiate in the surrounding disc the energy released by the accretion of solids, their eccentricity and inclination experience a growth toward values which depend on the luminosity to mass ratio of the planet, which are comparable to the disc's aspect ratio and which are reached over timescales of a few thousand years. This growth is triggered by the appearance of a hot, under-dense region in the vicinity of the planet. The growth rate of the eccentricity is typically three times larger than that of the inclination. In long term calculations, we find that the excitation of eccentricity and the excitation of inclination are not independent. In the particular case in which a planet has initially a very small eccentricity and inclination, the eccentricity largely overruns the inclination. When the eccentricity reaches its asymptotic value, the growth of inclination is quenched, yielding an eccentric orbit with a very low inclination. As a side result, we find that the eccentricity and inclination of non-luminous planets are damped more vigorously in radiative discs than in isothermal discs.
description: 13 pages, 16 figures. The videos showing the temperature excess around the planet along the epicycle and inclined motion can be found at https://www.fis.unam.mx/~masset/EklundMasset2017/
Phase field modeling of hydraulic fracture propagation in transversely isotropic poroelastic media
Creators: name: Zhou, Shuwei
name: Zhuang, Xiaoying
Publisher: name: arXiv
Year: 2023
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: This paper proposes a phase field model (PFM) for describing hydraulic fracture propagation in transversely isotopic media. The coupling between the fluid flow and displacement fields is established according to the classical Biot poroelasticity theory while the phase field model characterizes the fracture behavior. The proposed method uses a transversely isotropic constitutive relationship between stress and strain as well as anisotropy in fracture toughness and permeability. An additional pressure-related term and an anisotropic fracture toughness tensor are added in the energy functional, which is then used to obtain the governing equations of strong form via the variational approach. In addition, the phase field is used to construct indicator functions that transit the fluid property from the intact domain to the fully fractured one. Moreover, the proposed PFM is implemented using the finite element method where a staggered scheme is applied and the displacement and fluid pressure are monolithically solved in a staggered step. Afterwards, two examples are tested to initially verify the proposed PFM: a transversely isotropic single-edge-notched square plate subjected to tension and an isotropic porous medium subjected to internal fluid pressure. Finally, numerical examples of 2D and 3D transversely isotropic media with one or two interior notches subjected to internal fluid pressure are presented to further prove the capability of the proposed PFM in 2D and 3D problems.
The Effect of Unresolved Contaminant Stars on the Cross-Matching of Photometric Catalogues
Creators: name: Wilson, Tom J.
name: Naylor, Tim
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A fundamental process in astrophysics is the matching of two photometric catalogues. It is crucial that the correct objects be paired, and that their photometry does not suffer from any spurious additional flux. We compare the positions of sources in WISE, IPHAS, 2MASS, and APASS with Gaia DR1 astrometric positions. We find that the separations are described by a combination of a Gaussian distribution, wider than naively assumed based on their quoted uncertainties, and a large wing, which some authors ascribe to proper motions. We show that this is caused by flux contamination from blended stars not treated separately. We provide linear fits between the quoted Gaussian uncertainty and the core fit to the separation distributions. We show that at least one in three of the stars in the faint half of a given catalogue will suffer from flux contamination above the 1% level when the density of catalogue objects per PSF area is above approximately 0.005. This has important implications for the creation of composite catalogues. It is important for any closest neighbour matches as there will be a given fraction of matches that are flux contaminated, while some matches will be missed due to significant astrometric perturbation by faint contaminants. In the case of probability-based matching, this contamination affects the probability density function of matches as a function of distance. This effect results in up to 50% fewer counterparts being returned as matches, assuming Gaussian astrometric uncertainties for WISE-Gaia matching in crowded Galactic plane regions, compared with a closest neighbour match.
description: 10 pages, 6 figures; accepted for publication in the Monthly Notices of the Royal Astronomical Society
Current Induced Damping of Nanosized Quantum Moments in the Presence of Spin-Orbit Interaction
Creators: name: Mahfouzi, Farzad
name: Kioussis, Nicholas
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Motivated by the need to understand current-induced magnetization dynamics at the nanoscale, we have developed a formalism, within the framework of Keldysh Green function approach, to study the current-induced dynamics of a ferromagnetic (FM) nanoisland overlayer on a spin-orbit-coupling (SOC) Rashba plane. In contrast to the commonly employed classical micromagnetic LLG simulations the magnetic moments of the FM are treated {\it quantum mechanically}. We obtain the density matrix of the whole system consisting of conduction electrons entangled with the local magnetic moments and calculate the effective damping rate of the FM. We investigate two opposite limiting regimes of FM dynamics: (1) The precessional regime where the magnetic anisotropy energy (MAE) and precessional frequency are smaller than the exchange interactions, and (2) The local spin-flip regime where the MAE and precessional frequency are comparable to the exchange interactions. In the former case, we show that due to the finite size of the FM domain, the \textquotedblleft Gilbert damping\textquotedblright does not diverge in the ballistic electron transport regime, in sharp contrast to Kambersky's breathing Fermi surface theory for damping in metallic FMs. In the latter case, we show that above a critical bias the excited conduction electrons can switch the local spin moments resulting in demagnetization and reversal of the magnetization. Furthermore, our calculations show that the bias-induced antidamping efficiency in the local spin-flip regime is much higher than that in the rotational excitation regime.
description: 10 page, 9 figures