cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A Dirichlet Mixture Model of Hawkes Processes for Event Sequence Clustering
Creators: name: Xu, Hongteng
name: Zha, Hongyuan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We propose an effective method to solve the event sequence clustering problems based on a novel Dirichlet mixture model of a special but significant type of point processes --- Hawkes process. In this model, each event sequence belonging to a cluster is generated via the same Hawkes process with specific parameters, and different clusters correspond to different Hawkes processes. The prior distribution of the Hawkes processes is controlled via a Dirichlet distribution. We learn the model via a maximum likelihood estimator (MLE) and propose an effective variational Bayesian inference algorithm. We specifically analyze the resulting EM-type algorithm in the context of inner-outer iterations and discuss several inner iteration allocation strategies. The identifiability of our model, the convergence of our learning method, and its sample complexity are analyzed in both theoretical and empirical ways, which demonstrate the superiority of our method to other competitors. The proposed method learns the number of clusters automatically and is robust to model misspecification. Experiments on both synthetic and real-world data show that our method can learn diverse triggering patterns hidden in asynchronous event sequences and achieve encouraging performance on clustering purity and consistency.
Energy bounds for entangled states
Creators: name: Piccione, Nicolò
name: Militello, Benedetto
name: Napoli, Anna
name: Bellomo, Bruno
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We find the minimum and the maximum value for the local energy of an arbitrary finite bipartite system for any given amount of entanglement, also identifying families of states reaching these bounds and sharing formal analogies with thermal states. Then, we numerically study the probability of randomly generating pure states close to these energy bounds finding, in all the considered configurations, that it is extremely low except for the two-qubit and highly degenerate cases. These results can be important in quantum technologies to design energetically more efficient protocols.
description: 14 pages, 3 figures. Updated version close to the published one
On Landis Conjecture for the Fractional Schrödinger Equation
Creators: name: Kow, Pu-Zhao
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35R11, 35A02, 35B60

description: In this paper, we study a Landis-type conjecture for the general fractional Schrödinger equation $((-P)^{s}+q)u=0$. As a byproduct, we also proved the additivity and boundedness of the linear operator $(-P)^{s}$ for non-smooth coefficents. For differentiable potentials $q$, if a solution decays at a rate $\exp(-|x|^{1+})$, then the solution vanishes identically. For non-differentiable potentials $q$, if a solution decays at a rate $\exp(-|x|^{\frac{4s}{4s-1}+})$, then the solution must again be trivial. The proof relies on delicate Carleman estimates. This study is an extension of the work by Rüland-Wang (2019).
description: 44 pages
Implementing perceptron models with qubits
Creators: name: Wiersema, Roeland
name: Kappen, H. J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a method for learning a quantum probabilistic model of a perceptron. By considering a cross entropy between two density matrices we can learn a model that takes noisy output labels into account while learning. A multitude of proposals already exist that aim to utilize the curious properties of quantum systems to build a quantum perceptron, but these proposals rely on a classical cost function for the optimization procedure. We demonstrate the usage of a quantum equivalent of the classical log-likelihood, which allows for a quantum model and training procedure. We show that this allows us to better capture noisyness in data compared to a classical perceptron. By considering entangled qubits we can learn nonlinear separation boundaries, such as XOR.
Yield Uncertainty and Strategic Formation of Supply Chain Networks
Creators: name: Amelkin, Victor
name: Vohra, Rakesh
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Theoretical Economics (econ.TH)
subject: Optimization and Control (math.OC)
subject: Trading and Market Microstructure (q-fin.TR)
subject: FOS: Computer and information sciences
subject: FOS: Economics and business
subject: FOS: Mathematics
subject: G.2.2; C.2.3; G.1.6; I.2.11; G.3; J.4
subject: 90B15, 90B05, 90B30, 91B24, 91B38, 60K10, 97M40, 91D30

description: How does supply uncertainty affect the structure of supply chain networks? To answer this question we consider a setting where retailers and suppliers must establish a costly relationship with each other prior to engaging in trade. Suppliers, with uncertain yield, announce wholesale prices, while retailers must decide which suppliers to link to based on their wholesale prices. Subsequently, retailers compete with each other in Cournot fashion to sell the acquired supply to consumers. We find that in equilibrium retailers concentrate their links among too few suppliers, i.e., there is insufficient diversification of the supply base. We find that either reduction of supply variance or increase of mean supply, increases a supplier's profit. However, these two ways of improving service have qualitatively different effects on welfare: improvement of the expected supply by a supplier makes everyone better off, whereas improvement of supply variance lowers consumer surplus.
Fluid Dynamics far from Local Equilibrium
Creators: name: Romatschke, Paul
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Fluid dynamics is traditionally thought to apply only to systems near local equilibrium. In this case, the effective theory of fluid dynamics can be constructed as a gradient series. Recent applications of resurgence suggest that this gradient series diverges, but can be Borel-resummed, giving rise to a hydrodynamic attractor solution which is well defined even for large gradients. Arbitrary initial data quickly approaches this attractor via non-hydrodynamic mode decay. This suggests the existence of a new theory of far-from-equilibrium fluid dynamics. In this work, the framework of fluid dynamics far from local equilibrium for conformal system is introduced, and the hydrodynamic attractor solutions for rBRSSS, kinetic theory in the relaxation time approximation, and strongly-coupled N=4 SYM are identified for a system undergoing Bjorken flow.
description: 7 pages, 2 figures; v2: minor changes; v3: matches published version
On the symmetric Gelfand pair $(\mathcal{H}_n\times \mathcal{H}_{n-1},diag (\mathcal{H}_{n-1}))$
Creators: name: Tout, Omar
Publisher: name: arXiv
Year: 2019
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E10, 05E15, 20C30

description: We show that the $\mathcal{H}_{n-1}$-conjugacy classes of $\mathcal{H}_n,$ where $\mathcal{H}_n$ is the hyperoctahedral group on $2n$ elements, are indexed by marked bipartitions of $n.$ This will lead us to prove that $(\mathcal{H}_n\times \mathcal{H}_{n-1},diag (\mathcal{H}_{n-1}))$ is a symmetric Gelfand pair and that the induced representation $1_{diag (\mathcal{H}_{n-1})}^{\mathcal{H}_n\times \mathcal{H}_{n-1}}$ is multiplicity free.
Quantum natural gradient generalised to noisy and non-unitary circuits
Creators: name: Koczor, Bálint
name: Benjamin, Simon C.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Variational quantum algorithms are promising tools whose efficacy depends on their optimisation method. For noise-free unitary circuits, the quantum generalisation of natural gradient descent has been introduced and shown to be equivalent to imaginary time evolution: the approach is effective due to a metric tensor reconciling the classical parameter space to the device's Hilbert space. Here we generalise quantum natural gradient to consider arbitrary quantum states (both mixed and pure) via completely positive maps; thus our circuits can incorporate both imperfect unitary gates and fundamentally non-unitary operations such as measurements. We employ the quantum Fisher information (QFI) as the core metric in the space of density operators. A modification of the Error Suppression by Derangements (ESD) and Virtual Distillation (VD) techniques enables an accurate and experimentally-efficient approximation of the QFI via the Hilbert-Schmidt metric tensor using prior results on the dominant eigenvector of noisy quantum states. Our rigorous proof also establishes the fundamental observation that the geometry of typical noisy quantum states is (approximately) identical in either the Hilbert-Schmidt metric or as characterised by the QFI. In numerical simulations of noisy quantum circuits we demonstrate the practicality of our approach and confirm it can significantly outperform other variational techniques.
description: 25 pages, 7 figures -- added new proofs and added new numerical simulations
A short proof of $\ell^2$ decoupling for the moment curve
Creators: name: Guo, Shaoming
name: Li, Zane Kun
name: Yung, Po-Lam
name: Zorin-Kranich, Pavel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Number Theory (math.NT)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 11L07 (Primary) 11L15, 42B25, 26D05 (Secondary)

description: We give a short and elementary proof of the $\ell^{2}$ decoupling inequality for the moment curve in $\mathbb{R}^k$, using a bilinear approach inspired by the nested efficient congruencing argument of Wooley (arXiv:1708.01220).
description: v3: fixed up issues about weights in the published version. Weights in Section 3 are now required to decay a bit faster at infinity, and proofs of properties of weights are now given in an Appendix
Flagged Schur polynomial duality via a lattice path bijection
Creators: name: McDowell, Eoghan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05A10, 05A19, 05E05

description: This paper proves an identity between flagged Schur polynomials, giving a duality between row flags and column flags. This identity generalises both the binomial determinant duality theorem due to Gessel and Viennot and the symmetric function duality theorem due to Aitken. As corollaries we obtain the lifts of the binomial determinant duality theorem to $q$-binomial coefficients and to symmetric polynomials. Our method is a path counting argument on a novel lattice generalising that used by Gessel and Viennot.
description: 16 pages, 5 figures (accepted manuscript version; journal information updated)
Gelfand pairs involving the wreath product of finite abelian groups with symmetric groups
Creators: name: Tout, Omar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Group Theory (math.GR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 05E10, 20C30

description: It is well known that the pair $(\mathcal{S}_n,\mathcal{S}_{n-1})$ is a Gelfand pair where $\mathcal{S}_n$ is the symmetric group on $n$ elements. In this paper, we prove that if $G$ is a finite group then $(G\wr \mathcal{S}_n, G\wr \mathcal{S}_{n-1}),$ where $G\wr \mathcal{S}_n$ is the wreath product of $G$ by $\mathcal{S}_n,$ is a Gelfand pair if and only if $G$ is abelian.
description: 6 pages
Zeeman and spin-orbit effects in the Andreev spectra of nanowire junctions
Creators: name: van Heck, B.
name: Väyrynen, J. I.
name: Glazman, L. I.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study the energy spectrum and the electromagnetic response of Andreev bound states in short Josephson junctions made of semiconducting nanowires. We focus on the joint effect of Zeeman and spin-orbit coupling on the Andreev level spectra. Our model incorporates the penetration of the magnetic field in the proximitized wires, which substantially modifies the spectra. We pay special attention to the occurrence of fermion parity switches at increasing values of the field and to the magnetic field dependence of the absorption strength of microwave-induced transitions. Our calculations can be used to extract quantitative information from microwave and tunneling spectroscopy experiments, such as the recently reported measurements in Van Woerkom et al., arXiv:1609.00333.
description: 22 pages, 12 figures. v2: a few edits in text and figures, references added. Published version
What it means to be a man : elite masculinity and warfare in Cisalpine Gaul c. 400-50 BC
Creators: name: Lumsden, Alastair Richard
Publisher: name: The University of St Andrews
Year: 2023
Subjects: subject: Celts
subject: Gauls
subject: Elite masculinity
subject: Warfare
subject: Archaeology
subject: Barbarian cultures
subject: Roman Republic
subject: DG89.L86
subject: Celts--Italy--History
subject: Gauls--Italy--History
subject: Masculinity--History
subject: Excavations (Archaeology)--Rome
subject: Weapons, Ancient Rome--History
subject: Military art and science--History--To 500
subject: Gaul--History--To 58 B.C.

description: This thesis explores Cisalpine masculinity and warfare over the period c. 400-50 BC and seeks to demonstrate that material cultural changes reflected broader socio-political and military developments. A statistical analysis is undertaken of the composition of weapon burials from the largest and best-documented Gallic necropoleis in Cispadane and Transpadane Gaul. This reveals that specific combinations of La Tène, Golaseccan, and Italic mortuary goods were employed to express an individual’s position in an aristocratic hierarchy, and that these differed between Cisalpine Gallic groups in chronological, regional and intra-regional contexts. These results are then compared with how elite masculinity was expressed amongst other contemporary tribal groups from Transalpine Gaul and the Italian and Iberian peninsulas, along with their socio-political and military developments. The second half of the thesis combines these conclusions with an examination of the Graeco-Roman battle narratives involving Cisalpine Gallic forces and constructs the first in-depth analysis of organisational and tactical capabilities of these forces. Ultimately, this study demonstrates that the Cisalpine Gallic tribes experienced a significant period of socio-political development during the third century, greatly increasing the sophistication of their warcraft and military forces.
Endomorphism algebras and Hecke algebras for reductive p-adic groups
Creators: name: Solleveld, Maarten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 22E50, 20G25, 20C08

description: Let G be a reductive p-adic group and let Rep(G)^s be a Bernstein block in the category of smooth complex G-representations. We investigate the structure of Rep(G)^s, by analysing the algebra of G-endomorphisms of a progenerator Πof that category. We show that Rep(G)^s is "almost" Morita equivalent with a (twisted) affine Hecke algebra. This statement is made precise in several ways, most importantly with a family of (twisted) graded algebras. It entails that, as far as finite length representations are concerned, Rep(G)^s and End_G (Π)-Mod can be treated as the module category of a twisted affine Hecke algebra. We draw two consequences. Firstly, we show that the equivalence of categories between Rep(G)^s and End_G (Π)-Mod preserves temperedness of finite length representations. Secondly, we provide a classification of the irreducible representations in Rep(G)^s, in terms of the complex torus and the finite group canonically associated to Rep(G)^s. This proves a version of the ABPS conjecture and enables us to express the set of irreducible $G$-representations in terms of the supercuspidal representations of the Levi subgroups of $G$. Our methods are independent of the existence of types, and apply in complete generality.
description: New in second version: - compatibility of the constructions with parabolic induction is discusssed - the presentation of the arguments for temperedness is improved - a paragraph about a smaller progenerator of Rep(G)^s, and how that works out in the non-cuspidal case. In 2023 a problem with the part on temperedness in paragraph 9.1 surfaced. This is repaired in an appendix to version 3
Learning of state-space models with highly informative observations: a tempered Sequential Monte Carlo solution
Creators: name: Svensson, Andreas
name: Schön, Thomas B.
name: Lindsten, Fredrik
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation (stat.CO)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Probabilistic (or Bayesian) modeling and learning offers interesting possibilities for systematic representation of uncertainty using probability theory. However, probabilistic learning often leads to computationally challenging problems. Some problems of this type that were previously intractable can now be solved on standard personal computers thanks to recent advances in Monte Carlo methods. In particular, for learning of unknown parameters in nonlinear state-space models, methods based on the particle filter (a Monte Carlo method) have proven very useful. A notoriously challenging problem, however, still occurs when the observations in the state-space model are highly informative, i.e. when there is very little or no measurement noise present, relative to the amount of process noise. The particle filter will then struggle in estimating one of the basic components for probabilistic learning, namely the likelihood $p($data$|$parameters$)$. To this end we suggest an algorithm which initially assumes that there is substantial amount of artificial measurement noise present. The variance of this noise is sequentially decreased in an adaptive fashion such that we, in the end, recover the original problem or possibly a very close approximation of it. The main component in our algorithm is a sequential Monte Carlo (SMC) sampler, which gives our proposed method a clear resemblance to the SMC^2 method. Another natural link is also made to the ideas underlying the approximate Bayesian computation (ABC). We illustrate it with numerical examples, and in particular show promising results for a challenging Wiener-Hammerstein benchmark problem.
Absolute bacterial cell enumeration using flow cytometry
Creators: name: Ou, Fang
name: McGoverin, Cushla
name: Swift, Simon
name: Vanholsbeeck, Frederique
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Aim: To evaluate a flow cytometry protocol that uses reference beads for the enumeration of live and dead bacteria present in a mixture. Methods and Results: Mixtures of live and dead Escherichia coli with live:dead concentration ratios varying from 0 to 100% were prepared. These samples were stained using SYTO 9 and propidium iodide and 6 μm reference beads were added. Bacteria present in live samples were enumerated by agar plate counting. Bacteria present in dead samples were enumerated by agar plate counting before treatment with isopropanol. There is a linear relationship between the presented flow cytometry method and agar plate counts for live (R2 = 0.99) and dead E. coli (R2 = 0.93) concentrations of ca. 104 to 108 bacteria ml-1 within mixtures of live and dead bacteria. Conclusions: Reliable enumeration of live E. coli within a mixture of both live and dead was possible for concentration ratios of above 2.5% live and for the enumeration of dead E. coli the lower limit was ca. 20% dead. Significance and Impact of the Study: The ability to obtain absolute cell concentrations is only available for selected flow cytometers, this study describes a method for accurate enumeration that is applicable to basic flow cytometers without specialised counting features. By demonstrating the application of the method to count E. coli, we raised points of consideration for using this FCM counting method and aim to lay the foundation for future work that uses similar methods for different bacterial strains.
description: 31 pages, 14 figures
A general procedure for accurate defect excitation energies from DFT-1/2 band structures: The case of NV$^-$ center in diamond
Creators: name: Lucatto, Bruno
name: Assali, Lucy V. C.
name: Pela, Ronaldo Rodrigues
name: Marques, Marcelo
name: Teles, Lara K.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: A major challenge in creating a quantum computer is to find a quantum system that can be used to implement the qubits. For this purpose, deep centers are prominent candidates, and ab initio calculations are one of the most important tools to theoretically study their properties. However, these calculations are highly involved, due to the large supercell needed, and the computational cost can be even larger when one goes beyond the Kohn-Sham scheme to correct the band gap problem and achieve good accuracy. In this work, we present a method that overcomes these problems and provides the optical transition energies as a difference of Kohn-Sham eigenvalues; and even more, provides a complete and accurate band structure of the defect in the semiconductor. Despite the original motivations, the presented methodology is a general procedure, which can be used to systematically study the optical transitions between localized levels within the band gap of any system. The method is an extension of the low-cost and parameter-free DFT-1/2 approximate quasi-particle correction, and allows it to be applied in the study of complex defects. As a benchmark, we apply the method to the NV$^-$ center in diamond. The agreement with experiments is remarkable, with an accuracy of 0.1 eV. The band structure agrees with the expected qualitative features of this system, and thus provides a good intuitive physical picture by itself.
description: 10 pages, 6 figures, 2 tables
แนวทางการจัดทำคำอธิบายเอกสารจดหมายเหตุมหาวิทยาลัยโดยใช้ ISAD(G)
Creators: name: บุหลัน กุลวิจิตร
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: คำอธิบายเอกสารจดหมายเหตุ
เอกสารจดหมายเหตุมหาวิทยาลัย
ISAD(G)

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 1-11
WKB theory of large deviations in stochastic populations
Creators: name: Assaf, Michael
name: Meerson, Baruch
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Stochasticity can play an important role in the dynamics of biologically relevant populations. These span a broad range of scales: from intra-cellular populations of molecules to population of cells and then to groups of plants, animals and people. Large deviations in stochastic population dynamics - such as those determining population extinction, fixation or switching between different states - are presently in a focus of attention of statistical physicists. We review recent progress in applying different variants of dissipative WKB approximation (after Wentzel, Kramers and Brillouin) to this class of problems. The WKB approximation allows one to evaluate the mean time and/or probability of population extinction, fixation and switches resulting from either intrinsic (demographic) noise, or a combination of the demographic noise and environmental variations, deterministic or random. We mostly cover well-mixed populations, single and multiple, but also briefly consider populations on heterogeneous networks and spatial populations. The spatial setting also allows one to study large fluctuations of the speed of biological invasions. Finally, we briefly discuss possible directions of future work.
description: A topical review, 68 pages, 32 figures; some errors and typos corrected
Two-photon-interaction effects in the bad-cavity limit
Creators: name: Piccione, Nicolò
name: Felicetti, Simone
name: Bellomo, Bruno
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Various experimental platforms have proven to be valid testbeds for the implementation of nondipolar light-matter interactions, where atomic systems and confined modes interact via two-photon couplings. Here, we study a damped quantum harmonic oscillator interacting with $N$ two-level systems via a two-photon coupling in the so-called bad-cavity limit, in the presence of finite-temperature baths and coherent and incoherent drivings. We have succeeded in applying a recently developed adiabatic elimination technique to derive an effective master equation for the two-level systems, presenting two fundamental differences compared to the case of a dipolar interaction: an enhancement of the two-level systems spontaneous-like emission rate, including a thermal contribution and a quadratic term in the coherent driving, and an increment of the effective temperature perceived by the two-level systems. These differences give rise to striking effects in the two-level systems dynamics, including a faster generation of steady-state coherence and a richer dependence on temperature of the collective effects, which can be made stronger at higher temperature.
description: 17 pages, 5 figures. Updated version close to the published one
Affective engagement with narrative
Creators: name: Studt, Eric Michael
Publisher: name: The University of St Andrews
Year: 2023
Subjects: subject: Narrative
subject: Emotion
subject: Predictive processing
subject: Valence
subject: Arousal
subject: Affect
subject: Situated conceptualisation
subject: Constructionist theory of emotion
subject: Core affect
subject: Expressivism
subject: Simulation theory
subject: Aesthetics
subject: Attention
subject: B815.S8
subject: Emotions--Philosophy

description: This thesis takes the work of psychologists James Russell and Lisa Feldman Barrett on core affect and applies it to engagement with narrative. In the first part, I situate core affect in the philosophy of emotion and, drawing on the predictive-processing model of cognition, I explore valence and arousal, the two elements of core affect. The second part relies on Lawrence Barsalou’s research on situated conceptualisation to build a bridge from core affect in philosophy and psychology to affective engagement with narrative. Firstly, I argue that narratives present situated conceptualisations that readers access via their own conceptual frameworks. Secondly, I show that the way that conceptualisations are situated in the narrative can in part explain why readers affectively respond to narratives in the ways that they do. Thirdly, building on the work of R.G. Collingwood and Jenefer Robinson, I explore what it means for some narratives to express affect. In short, this thesis brings an increasingly influential theory of emotion, namely the psychological construction view of emotion, which holds that emotions are constructed out of core affect and emotion concepts, into conversation with models of affective engagement with narrative in aesthetics and offers a framework for thinking about readers’ affective responses to narratives.
Möbius domain-wall fermions on gradient-flowed dynamical HISQ ensembles
Creators: name: Berkowitz, Evan
name: Bouchard, Chris
name: Chang, Chia Cheng
name: Clark, M. A.
name: Joo, Balint
name: Kurth, Thorsten
name: Monahan, Christopher
name: Nicholson, Amy
name: Orginos, Kostas
name: Rinaldi, Enrico
name: Vranas, Pavlos
name: Walker-Loud, Andre
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We report on salient features of a mixed lattice QCD action using valence Möbius domain-wall fermions solved on the dynamical $N_f=2+1+1$ HISQ ensembles generated by the MILC Collaboration. The approximate chiral symmetry properties of the valence fermions are shown to be significantly improved by utilizing the gradient-flow scheme to first smear the HISQ configurations. The greater numerical cost of the Möbius domain-wall inversions is mitigated by the highly efficient QUDA library optimized for NVIDIA GPU accelerated compute nodes. We have created an interface to this optimized QUDA solver in Chroma. We provide tuned parameters of the action and performance of QUDA using ensembles with the lattice spacings $a \simeq \{0.15, 0.12, 0.09\}$ fm and pion masses $m_π\simeq \{310, 220,130\}$ MeV. We have additionally generated two new ensembles with $a\sim0.12$ fm and $m_π\sim\{400, 350\}$ MeV. With a fixed flow-time of $t_{gf}=1$ in lattice units, the residual chiral symmetry breaking of the valence fermions is kept below 10\% of the light quark mass on all ensembles, $m_{res} \lesssim 0.1\times m_l$, with moderate values of the fifth dimension $L_5$ and a domain-wall height $M_5 \leq 1.3$. As a benchmark calculation, we perform a continuum, infinite volume, physical pion and kaon mass extrapolation of $F_{K^\pm}/F_{π^\pm}$ and demonstrate our results are independent of flow-time, and consistent with the FLAG determination of this quantity at the level of less than one standard deviation.
description: 14 pages + refs, 5 figures; v3 is version accepter for publication; v2 includes continuum chiral extrapolation analysis of FK/Fpi and details of two new HISQ ensembles generated
วิชาชีพนักสารสนเทศไฮบริดในยุคดิจิทัล
Creators: name: ศรีหทัย เวลล์ส
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: สารสนเทศศึกษา
มหาวิทยาลัยบูรพา
วิชาชีพนักสารสนเทศไฮบริด

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 12-22
การพัฒนาสารสนเทศเพื่อสนับสนุนตลาดอาหารปลอดภัย กรณีศึกษา ศิลปากรกรีนมาร์เก็ต
Creators: name: กัลยา เทียนวงศ์
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: การพัฒนาสารสนเทศ
ตลาดนัดสีเขียว
ตลาดอาหารปลอดภัย
ศิลปากรกรีนมาร์เก็ต

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 23-40
Velocity-Density Correlations from the cosmicflows-3 Distance Catalog and the 2MASS Redshift Survey
Creators: name: Nusser, Adi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The peculiar velocity of a mass tracer is on average aligned with the dipole modulation of the surrounding mass density field. We present a first measurement of the correlation between radial peculiar velocities of objects in the cosmicflows-3 catalog and the dipole moment of the 2MRS galaxy distribution in concentric spherical shells centered on these objects. Limiting the analysis to cosmicflows-3 objects with distances of $100 \rm Mpc h^{-1}$, the correlation function is detected at a confidence level $> 4σ$. The measurement is found consistent with the standard $Λ$CDM model at $< 1.7σ$ level. We formally derive the constraints $0.32
description: In press (MNRAS), 10 pages, 7 figures
An Efficient Protocol For Computations Delegation Using Rerandomizable Garbled Circuits
Creators: name: Ibrahim, Ahmed Salah Tawfik
name: Gouhar, Amr Adel Mohamed Elsaid
name: Ghazy, Ahmed Alaa Abdelmonem
name: Ahmed, Mohamed Ahmed Abdelshahied
name: Youssif, George Emil Boshra
Publisher: name: Zenodo
Year: 2023
Subjects: Yao's Garbled Circuits
Delegating Computations
Homomorphic Encryption
ElGamal Encryption
Secure Multi-party Computation
Non-interactive Protocols

description: We consider the problem of delegating computations, in which a client may outsource the computation of a function, represented as a boolean circuit, to an external entity, then receives the result and a proof of correctness that can be verified efficiently. Most existing noninteractive solutions rely on the use of fully homomorphic encryption, which is practically unaffordable. As it turns out, making a probabilistic assumption about the honesty of the external entity eliminates the need for FHE. This paper describes an efficient protocol for delegating computations that also guarantees input and output privacy. The protocol is a new variant of the multi-server model and the cycle architecture from Ananth et al., which is based on the assumption of the existence of at least one honest server. We carefully utilize an alternative re-randomizable variant of Yao’s garbled circuits based on the ElGamal encryption scheme, which leads to a secure, private, and efficient protocol based on the DDH assumption. Furthermore, we describe an example implementation of an application of the protocol: a fully decentralized verifiable system for outsourcing computations, VDCS, which serves as a proof-of-concept prototype.
Affine Hecke algebras and their representations
Creators: name: Solleveld, Maarten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20C08

description: This is a survey paper about affine Hecke algebras. We start from scratch and discuss some algebraic aspects of their representation theory, referring to the literature for proofs. We aim in particular at the classification of irreducible representations. Only at the end we establish a new result: a natural bijection between the set of irreducible representations of an affine Hecke algebra with real parameters $\geq 1$, and the set of irreducible representations of the affine Weyl group underlying the algebra. This can be regarded as a generalized Springer correspondence with affine Hecke algebras.
description: In the second version some typos were fixed and a paragraph about Hecke algebras of type B_n/C_n was added
Equivariant CR minimal immersions from $S^3$ into $\mathbb{C}P^n$
Creators: name: Hu, Zejun
name: Yin, Jiabin
name: Li, Zhenqi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: Primary 53C24, Secondary 53C42, 53C55

description: The equivariant CR minimal immersions from the round $3$-sphere $S^3$ into the complex projective space $\mathbb CP^n$ have been classified by the third author explicitly (J London Math Soc 68: 223-240, 2003). In this paper, by employing the equivariant condition which implies that the induced metric is left-invariant, and that all geometric properties of $S^3={\rm SU}(2)$ endowed with a left-invariant metric can be expressed in terms of the structure constants of the Lie algebra $\mathfrak{su}(2)$, we establish an extended classification theorem for equivariant CR minimal immersions from the $3$-sphere $S^3$ into $\mathbb CP^n$ without the assumption of constant sectional curvatures.
description: 23 pages;This article has been accepted for publication in Annals of Global Analysis and Geometry
องค์ประกอบตัวชี้วัดแหล่งท่องเที่ยวที่ส่งผลต่อการเป็นแหล่งเรียนรู้เชิงธรณีวิทยา จังหวัดเชียงราย
Creators: name: ชฏาพัศฐ์ สุขภาย
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: องค์ประกอบและตัวชี้วัดแหล่งท่องเที่ยว
แหล่งเรียนรู้เชิงธรณีวิทยา

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 41-53
Evolution of a semidiscrete system modeling the scattering of acoustic waves by a piezoelectric solid
Creators: name: Brown, Thomas S.
name: Sánchez-Vizuet, Tonatiuh
name: Sayas, Francisco-Javier
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65J08, 65M38, 65M60, 65R20

description: We consider a model problem of the scattering of linear acoustic waves in free homogeneous space by an elastic solid. The stress tensor in the solid combines the effect of a linear dependence of strains with the influence of an existing electric field. The system is closed using Gauss's law for the associated electric displacement. Well-posedness of the system is studied by its reformulation as a first order in space and time differential system with help of an elliptic lifting operator. We then proceed to studying a semidiscrete formulation, corresponding to an abstract Finite Element discretization in the electric and elastic fields, combined with an abstract Boundary Element approximation of a retarded potential representation of the acoustic field. The results obtained with this approach improve estimates obtained with Laplace domain techniques. While numerical experiments illustrating convergence of a fully discrete version of this problem had already been published, we demonstrate some properties of the full model with some simulations for the two dimensional case.
Current research on Gödel's incompleteness theorems
Creators: name: Cheng, Yong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic (math.LO)
subject: FOS: Mathematics
subject: 03F40, 03F30, 03F25

description: We give a survey of current research on Gödel's incompleteness theorems from the following three aspects: classifications of different proofs of Gödel's incompleteness theorems, the limit of the applicability of Gödel's first incompleteness theorem, and the limit of the applicability of Gödel's second incompleteness theorem.
description: 54 pages, final accepted version, to appear in The Bulletin of Symbolic Logic
A tale of two modes: Neutrino free-streaming in the early universe
Creators: name: Lancaster, Lachlan
name: Cyr-Racine, Francis-Yan
name: Knox, Lloyd
name: Pan, Zhen
Publisher: name: arXiv
Year: 2017
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present updated constraints on the free-streaming nature of cosmological neutrinos from cosmic microwave background (CMB) power spectra, baryonic acoustic oscillation data, and local measurements of the Hubble constant. Specifically, we consider a Fermi-like four-fermion interaction between massless neutrinos, characterized by an effective coupling constant $ G_{\rm eff}$, and resulting in a neutrino opacity $\dotτ_ν\propto G_{\rm eff}^2 T_ν^5$. Using a conservative prior on the parameter $\log_{10}\left(G_{\rm eff} {\rm MeV}^2\right)$, we find a bimodal posterior distribution. The first of these modes is consistent with the standard $Λ$CDM cosmology and corresponds to neutrinos decoupling at redshift $z_{ν,{\rm dec}} > 1.3\times10^5$. The other mode of the posterior, dubbed the "interacting neutrino mode", corresponds to neutrino decoupling occurring within a narrow redshift window centered around $z_{ν,{\rm dec}}\sim8300$. This mode is characterized by a high value of the effective neutrino coupling constant, together with a lower value of the scalar spectral index and amplitude of fluctuations, and a higher value of the Hubble parameter. Using both a maximum likelihood analysis and the ratio of the two mode's Bayesian evidence, we find the interacting neutrino mode to be statistically disfavored compared to the standard $Λ$CDM cosmology. Interestingly, the addition of CMB polarization and direct Hubble constant measurements significantly raises the statistical significance of this secondary mode, indicating that new physics in the neutrino sector could help explain the difference between local measurements of $H_0$, and those inferred from CMB data. A robust consequence of our results is that neutrinos must be free streaming long before the epoch of matter-radiation equality.
description: 22 pages + references, 9 figures, 4 tables, references added
การพัฒนาสื่อออนไลน์เพื่อป้องกันการใช้ความรุนแรงของเด็กวัยรุ่น
Creators: name: สหะ พุกศิริวงศ์ชัย
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: สื่อออนไลน์
เด็กวัยรุ่น
การป้องกันความรุนแรง

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 54-64
On K3 surfaces of Picard rank 14
Creators: name: Clingher, Adrian
name: Malmendier, Andreas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14J27, 14J28, 14J15, 14D22

description: We study complex algebraic K3 surfaces with finite automorphism groups and polarized by rank-fourteen, 2-elementary lattices. Three such lattices exist, namely $H \oplus E_8(-1) \oplus A_1(-1)^{\oplus 4}$, $H \oplus E_8(-1) \oplus D_4(-1)$, and $H \oplus D_8(-1) \oplus D_4(-1)$. As part of our study, we provide birational models for these surfaces as quartic projective hypersurfaces and describe the associated coarse moduli spaces in terms of suitable modular invariants. Additionally, we explore the connection between these families and dual K3 families related via the Nikulin construction.
description: 51 pages
Interplay of chiral and helical states in a Quantum Spin Hall Insulator lateral junction
Creators: name: Calvo, M. R.
name: de Juan, F.
name: Ilan, R.
name: Fox, E. J.
name: Bestwick, A. J.
name: Mühlbauer, M.
name: Wang, J.
name: Ames, C.
name: Leubner, P.
name: Brüne, C.
name: Zhang, S. C.
name: Buhmann, H.
name: Molenkamp, L. W.
name: Goldhaber-Gordon, D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the electronic transport across an electrostatically-gated lateral junction in a HgTe quantum well, a canonical 2D topological insulator, with and without applied magnetic field. We control carrier density inside and outside a junction region independently and hence tune the number and nature of 1D edge modes propagating in each of those regions. Outside the 2D gap, magnetic field drives the system to the quantum Hall regime, and chiral states propagate at the edge. In this regime, we observe fractional plateaus which reflect the equilibration between 1D chiral modes across the junction. As carrier density approaches zero in the central region and at moderate fields, we observe oscillations in resistance that we attribute to Fabry-Perot interference in the helical states, enabled by the broken time reversal symmetry. At higher fields, those oscillations disappear, in agreement with the expected absence of helical states when band inversion is lifted.
description: 5 pages, 4 figures, supp. mat
การสื่อสารตราสินค้าผลิตภัณฑ์เครื่องดื่มแอลกอฮอล์ที่ปรากฏบนสื่อสังคมออนไลน์ในสังคมไทย
Creators: name: ชิษยรัสย์ ศิริไปล์
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: การสื่อสารตราสินค้า
เครื่องดื่มแอลกอฮอล์
สื่อสังคมออนไลน์

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 65-78
Scalar geons in Born-Infeld gravity
Creators: name: Afonso, V. I.
name: Olmo, Gonzalo J.
name: Rubiera-Garcia, D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The existence of static, spherically symmetric, self-gravitating scalar field solutions in the context of Born-Infeld gravity is explored. Upon a combination of analytical approximations and numerical methods, the equations for a free scalar field (without a potential term) are solved, verifying that the solutions recover the predictions of General Relativity far from the center but finding important new effects in the central regions. We find two classes of objects depending on the ratio between the Schwarzschild radius and a length scale associated to the Born-Infeld theory: massive solutions have a wormhole structure, with their throat at $r\approx 2M$, while for the lighter configurations the topology is Euclidean. The total energy density of these solutions exhibits a solitonic profile with a maximum peaked away from the center, and located at the throat whenever a wormhole exists. The geodesic structure and curvature invariants are analyzed for the various configurations considered.
description: 19 pages (double column), 21 figures. Typos corrected, references updated. An appendix has been added. Version accepted for publication in JCAP
Generation of minimum energy entangled states
Creators: name: Piccione, Nicolò
name: Militello, Benedetto
name: Napoli, Anna
name: Bellomo, Bruno
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum technologies exploiting bipartite entanglement could be made more efficient by using states having the minimum amount of energy for a given entanglement degree. Here, we study how to generate these states in the case of a bipartite system of arbitrary finite dimension either by applying a unitary transformation to its ground state or through a zero-temperature thermalization protocol based on turning on and off a suitable interaction term between the subsystems. In particular, we explicitly identify three possible unitary operators and five possible interaction terms. On one hand, two of the three unitary transformations turn out to be easily decomposable in terms of local elementary operations and a single nonlocal one, making their implementation easier. On the other hand, since the thermalization procedures can be easily adapted to generate many different states, we numerically show that, for each degree of entanglement, generating minimum-energy entangled states costs, in general, less than generating the vast majority of the other states.
description: 16 pages, 6 figures. Updated version close to the published one
Accessing needle exchange services in disasters for remote areas of Aotearoa New Zealand
Creators: name: Rijnink, Anne
name: Blake, Denise
name: Groot, Shiloh
name: Brough, Chris
Publisher: name: Open Access Te Herenga Waka-Victoria University of Wellington
Year: 2022
Subjects: subject: 111799 Public Health and Health Services not elsewhere classified
subject: FOS: Health sciences

description: Abstract Background Needle Exchange Programme (NEP) mobile outreach services in Aotearoa New Zealand distribute injecting equipment to people who inject drugs (PWID) living in remote regions. In disasters, continued access to such services is imperative for the health and wellbeing of PWID. Disasters can compound existing inequities, particularly in regions characterised by poor or limited infrastructure, smaller populations, and challenging socioeconomic conditions. To gain insight into the barriers that prevent access to NEP harm-reduction services and understand the needs of PWID prior to and during disasters, this study foregrounds the voices of PWID based on the West Coast of the South Island, Aotearoa New Zealand. Methods This qualitative study applied an interpretive phenomenological analysis approach, where 14 PWID and one key NEP staff member took part in semi-structured interviews. The interviews provided the opportunity for participants to share their experiences and perspectives about accessing sterile drug-injecting equipment during disasters, including the four-week COVID-19 Level 4 lockdown in March 2020. In total five superordinate and 14 subordinate themes were identified from the interveiws. Results This study focuses on four of the key themes that impacted accessibility to NEP services: infrastructural hazards and equipment costs; social capital and practical support from peers and key contact networks; social stigma in public locations, including NEP-based pharmacies and emergency centres; and potential solutions to NEP equipment accessibility as frequently suggested by participants. Conclusions Access to NEP services is essential during natural hazard and human-generated disasters, as such NEP mobile outreach services and disaster resilience efforts should focus on maintaining service continuity for PWID during adverse times. This study champions a needs-based, stigma free approach to inclusive harm-reduction and emergency management practices for groups with specific needs in a disaster context.