cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Self-Learning Threshold-Based Load Balancing
Creators: name: Goldsztajn, Diego
name: Borst, Sem C.
name: van Leeuwaarden, Johan S. H.
name: Mukherjee, Debankur
name: Whiting, Philip A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Performance (cs.PF)
subject: Probability (math.PR)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: C.4; G.3
subject: 60F17, 60K25 (Primary) 68M20 (Secondary)

description: We consider a large-scale service system where incoming tasks have to be instantaneously dispatched to one out of many parallel server pools. The user-perceived performance degrades with the number of concurrent tasks and the dispatcher aims at maximizing the overall quality-of-service by balancing the load through a simple threshold policy. We demonstrate that such a policy is optimal on the fluid and diffusion scales, while only involving a small communication overhead, which is crucial for large-scale deployments. In order to set the threshold optimally, it is important, however, to learn the load of the system, which may be unknown. For that purpose, we design a control rule for tuning the threshold in an online manner. We derive conditions which guarantee that this adaptive threshold settles at the optimal value, along with estimates for the time until this happens. In addition, we provide numerical experiments which support the theoretical results and further indicate that our policy copes effectively with time-varying demand patterns.
description: 52 pages, 6 figures
The formation and evolution of massive compact galaxies in cosmological simulations
Creators: name: Lohmann, Felipe
name: Schnorr-Müller, Allan
name: Trevisan, Marina
Publisher: name: Zenodo
Year: 2022

description: The population of quiescent galaxies undergoes significant changes over time. Ten billion years ago, these objects were generally compact and had a prominent disk with significant rotational support. In the local universe, however, they are larger by a factor of 3-5 and are mostly dispersion-supported ellipsoids. Still, there exists a rare population of galaxies that are still compact in the present-day universe, whose nature is still not well understood. One possibility is that these objects are galaxies formed at high redshifts that evolved passively. Or, they could have been formed at lower redshifts, but in similar conditions as the high redshift compact galaxies. In a recent work, our group studied a sample of compact quiescent galaxies from the MaNGA survey and found that, compared to average-sized quiescent galaxies, compact galaxies have similar ages, although being more metal rich and having a higher abundance of \(\alpha\) elements. However, while compact galaxies have a quiet accretion history, the opposite is true for average-sized galaxies. Thus, it is not clear whether the differences between the two populations are related to their high redshift progenitors or to a difference in their post-quenching evolution, e.g. the occurrence of mergers. Also, the local compact galaxies were shown to be the likely descendants of post-starburst galaxies, which can play a role in the observed properties of these objects. Since it is not possible to recover a detailed star formation history from archeological studies of local compact quiescent galaxies, an alternative is to study cosmological simulations, which reproduce various observables and allow a thorough analysis of the evolution of galaxies across time. The aim of the work is to study the population of compact quiescent galaxies at \(z=0\) in the IllustrisTNG cosmological simulation and see how the evolution of these objects differ from that of the population of average-sized quiescent galaxies. We compare their kinematics, stellar populations, environmental features and star-formation histories in order to fully characterize the differences between them. These results are then compared to those of recent studies in the literature in order to propose a scenario for the evolution of compact quiescent galaxies.
Improved Metropolis-Hastings algorithms via landscape modifcation with applications to simulated annealing and the Curie-Weiss model
Creators: name: Choi, Michael C. H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mathematical Physics (math-ph)
subject: Optimization and Control (math.OC)
subject: Probability (math.PR)
subject: Computation (stat.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 60J27, 60J28

description: In this paper, we propose new Metropolis-Hastings and simulated annealing algorithms on finite state space via modifying the energy landscape. The core idea of landscape modification rests on introducing a parameter $c$, in which the landscape is modified once the algorithm is above this threshold parameter to encourage exploration, while the original landscape is utilized when the algorithm is below the threshold for exploitation purpose. We illustrate the power and benefits of landscape modification by investigating its effect on the classical Curie-Weiss model with Glauber dynamics and external magnetic field in the subcritical regime. This leads to a landscape-modified mean-field equation, and with appropriate choice of $c$ the free energy landscape can be transformed from a double-well into a single-well, while the location of the global minimum is preserved on the modified landscape. Consequently, running algorithms on the modified landscape can improve the convergence to the ground-state in the Curie-Weiss model. In the setting of simulated annealing, we demonstrate that landscape modification can yield improved or even subexponential mean tunneling time between global minima in the low-temperature regime by appropriate choice of $c$, and give convergence guarantee using an improved logarithmic cooling schedule with reduced critical height. We also discuss connections between landscape modification and other acceleration techniques such as Catoni's energy transformation algorithm, preconditioning, importance sampling and quantum annealing. The technique developed in this paper is not only limited to simulated annealing and is broadly applicable to any difference-based discrete optimization algorithm by a change of landscape.
description: 30 pages, 6 figures. To appear in Advances in Applied Probability
The Buildings Gallery: visualising buildings
Creators: name: Bekker, Bram
name: Solleveld, Maarten
Publisher: name: arXiv
Year: 2020
Subjects: subject: History and Overview (math.HO)
subject: Group Theory (math.GR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 51E24 (Primary), 00A66 (Secondary)

description: Buildings are beautiful mathematical objects tying a variety of subjects in algebra and geometry together in a very direct sense. They form a natural bridge to visualising more complex principles in group theory. As such they provide an opportunity to talk about the inner workings of mathematics to a broader audience, but the visualisations could also serve as a didactic tool in teaching group and building theory, and we believe they can even inspire future research. We present an algorithmic method to visualise these geometric objects. The main accomplishment is the use of existing theory to produce three dimensional, interactive models of buildings associated to groups with a $BN$-pair. The final product, an interactive web application called The Buildings Gallery, can be found at https://buildings.gallery \citep{Bekker2020}.
description: 19 pages, 12 figures. For associated web application, see https://buildings.gallery/
Astrometric companions: low-mass stars, brown-dwarfs and planets
Creators: name: Ortiz-Leon, Gisela
Publisher: name: Zenodo
Year: 2022
Subjects: astrometry
radio astronomy
binaries
young stars
exoplanets
vlbi

description: High precision astrometry at the ≈10 uas level is now routinely achieved from the ground with the Very Long BaseIine Interferometry (VLBI) technique. The milli-arcsecond (mas) angular resolution of VLBI instruments allows to resolve binary systems were angular separations can be as small as a few mas. In addition, high precision astrometry allows searching for unseen companions, by the detection of the astrometric signature or “wobble” due to the gravitational pull of the companion. We have used astrometry at radio wavelengths to search for giant planets around very low mass stars, which are difficult to find by other techniques. In this contribution, we present the properties of low-mass young binaries and of two giant planets discovered with this technique.
description: {"references": ["Curiel et al. (2020)", "Curiel et al. (2022)", "Ortiz-Leon et al. (2017)"]}
A Comprehensive JWST Study on Galaxies at z~9-16 and Its Implication for the Roman Surveys
Creators: name: Harikane, Yuichi
Publisher: name: Zenodo
Year: 2023
Subjects: Galaxy Surveys at High Redshift

description: We present a comprehensive study on dropout galaxy candidates at z∼9−16 using the JWST/NIRCam images taken in the Cycle 1 ERO, ERS, and GO programs, and its implications for Roman observations of the high redshift universe. We carefully apply a secure photo-z selection criterion and conventional color criteria with confirmations of the ERO, ERS, and GO NIRSpec spectroscopic redshifts, and obtain a total of >20 dropout galaxies at z∼9−16, including two candidates at zphot~16. The derived UV luminosity functions at z~9-16 are better described by a double-power law function than the Schechter function, indicating a larger number of bright galaxies at z>9 than theoretical model predictions. The cosmic SFR density decreases from z∼9 to 12, and perhaps to 16, but the densities at z∼12−16 are higher than the constant star formation efficiency models, which indicates unusually high star formation efficiency probably by no suppression of star-formation by the UV background radiation at the pre-reionization epoch or an efficient UV radiation production by a top-heavy IMF possibly with Population III-like star formation. In this talk, I will also present the latest results from new NIRCam datasets calibrated with NIRSpec spectroscopic data obtained so far including successful redshift confirmation at z=10-13, and forecasts for the Roman surveys, in which we expect to detect >2000 galaxies at z>12 with Roman's Ks- band observations, allowing us to obtain the first statistical census of galaxies at such an early epoch.
การพัฒนาศักยภาพการเรียนรู้อย่างยั่งยืนสำหรับครูพลศึกษาและสุขศึกษาด้านกิจกรรมทางกายแบบวิถีชีวิตใหม่
Creators: name: ธีรนันท์ ตันพานิชย์
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: การพัฒนาศักยภาพ
การเรียนรู้อย่างยั่งยืน
กิจกรรมทางกาย
วิถีชีวิตใหม่

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 79-91
Stochastic Gradient Descent as Approximate Bayesian Inference
Creators: name: Mandt, Stephan
name: Hoffman, Matthew D.
name: Blei, David M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Stochastic Gradient Descent with a constant learning rate (constant SGD) simulates a Markov chain with a stationary distribution. With this perspective, we derive several new results. (1) We show that constant SGD can be used as an approximate Bayesian posterior inference algorithm. Specifically, we show how to adjust the tuning parameters of constant SGD to best match the stationary distribution to a posterior, minimizing the Kullback-Leibler divergence between these two distributions. (2) We demonstrate that constant SGD gives rise to a new variational EM algorithm that optimizes hyperparameters in complex probabilistic models. (3) We also propose SGD with momentum for sampling and show how to adjust the damping coefficient accordingly. (4) We analyze MCMC algorithms. For Langevin Dynamics and Stochastic Gradient Fisher Scoring, we quantify the approximation errors due to finite learning rates. Finally (5), we use the stochastic process perspective to give a short proof of why Polyak averaging is optimal. Based on this idea, we propose a scalable approximate MCMC algorithm, the Averaged Stochastic Gradient Sampler.
description: 35 pages, published version (JMLR 2017)
Tight-binding description of inorganic lead halide perovskites in cubic phase
Creators: name: Nestoklon, M. O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Band structure of inorganic lead halide perovskites is substantially different from the band structure of group IV, III-V and II-VI semiconductors. However, the standard empirical tight-binding model with sp3d5s* basis gives nearly perfect fit of band structure calculated in the density functional theory. The tight-binding calculations of ultrathin CsPbI3 layer show good agreement with the corresponding DFT calculations. The parameters corrected for the experimental data allow for the numerically cheap atomistic calculations of inorganic perovskite nanostructures.
description: 6 pages, 4 figures
How social network sentiments and activities impact cryptocurrencies’ trading volume and volatility?
Creators: name: Su, Xin
Publisher: name: University of Chicago
Year: 2022

description: This paper studies how the trading volume and volatility of Bitcoin and Ether are impacted by social media such as Twitter and GitHub. Bitcoin and Ether are the two largest cryptocurrencies in terms of market capitalization, and represent over 70\% of the total cryptocurrency market in combined value. Twitter and GitHub are two of the most important social network platforms. By utilizing linear regression models on tweets and GitHub activities, I find that tweet sentiments and GitHub activities are important predictors of cryptocurrency's trading volume and volatility. Specifically, as the total number of tweets increase, the cryptocurrency's trading volume and volatility tend to rise. The sentiment in the tweets is also found to be correlated with trading volume and volatility. The positive tweets increase is associated with decrease in the cryptocurrency's trading volume, while the increase in negative tweets leads to larger trading volume in cryptocurrency. When GitHub activities increase, the trading volume and volatility in cryptocurrency decreases. Theses findings suggest that trading volume and volatility in cryptocurrencies have associations with social media platforms.
ผลการเสริมน้ำส้มสายชูเทียม น้ำส้มควันไม้ และกรดอินทรีย์ในอาหารไก่ไข่ต่อสมรรถภาพการผลิตและคุณภาพไข่
Creators: name: เจษฎา รัตนวุฒิ
Publisher: name: คณะเทคโนโลยีการเกษตร มหาวิทยาลัยราชภัฏมหาสารคาม
Year: 2022
Subjects: อาหารไก่ไข่
น้ำส้มสายชูเทียม
น้ำส้มควันไม้
กรดอินทรีย์
คุณภาพไข่
laying hen diet
artificial vinegar
wood vinegar
mixed organic acid
egg quality

description: วารสารเกษตรพระวรุณ, 19, 2, 138-142
Low rattling: A predictive principle for self-organization in active collectives
Creators: name: Chvykov, Pavel
name: Berrueta, Thomas A.
name: Vardhan, Akash
name: Savoie, William
name: Samland, Alexander
name: Murphey, Todd D.
name: Wiesenfeld, Kurt
name: Goldman, Daniel I.
name: England, Jeremy L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Robotics (cs.RO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Self-organization is frequently observed in active collectives, from ant rafts to molecular motor assemblies. General principles describing self-organization away from equilibrium have been challenging to identify. We offer a unifying framework that models the behavior of complex systems as largely random, while capturing their configuration-dependent response to external forcing. This allows derivation of a Boltzmann-like principle for understanding and manipulating driven self-organization. We validate our predictions experimentally in shape-changing robotic active matter, and outline a methodology for controlling collective behavior. Our findings highlight how emergent order depends sensitively on the matching between external patterns of forcing and internal dynamical response properties, pointing towards future approaches for design and control of active particle mixtures and metamaterials.
The image of the Specht module under the inverse Schur functor in arbitrary characteristic
Creators: name: McDowell, Eoghan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 20G05 (Primary), 20C30, 05E10 (Secondary)

description: This paper gives a necessary and sufficient condition for the image of the Specht module under the inverse Schur functor to be isomorphic to the dual Weyl module in characteristic 2, and gives an elementary proof that this isomorphism holds in all cases in all other characteristics. These results are new in characteristics 2 and 3. We deduce some new examples of indecomposable Specht modules in characteristic 2. When the isomorphism does not hold, the dual Weyl module is still a quotient of the image of the Specht module, and we prove some additional results: we demonstrate that the image need not have a filtration by dual Weyl modules, we bound the dimension of the kernel of the quotient map, and we give some explicit descriptions for particular cases. Our method is to view the Specht and dual Weyl modules as quotients of suitable exterior powers by the Garnir relations.
description: 29 pages, 1 figure, 3 tables (accepted manuscript version; journal information updated)
Spatio-temporal Symmetry - Point Groups with Time Translations
Creators: name: Padmanabhan, Haricharan
name: Kingsland, Maggie L.
name: Munro, Jason M.
name: Litvin, Daniel B.
name: Gopalan, Venkatraman
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Spatial symmetries occur in combination with temporal symmetries in a wide range of physical systems in nature, including time-periodic quantum systems typically described by the Floquet formalism. In this context, groups formed by three-dimensional point group symmetry operations in combination with time translation operations are discussed in this work. The derivation of these 'spatio-temporal' groups from conventional point groups and their irreducible representations is outlined, followed by a complete listing. The groups are presented in a template similar to space group operations, and are visualized using a modified version of conventional stereographic projections. Simple examples of physical processes that simultaneously exhibit symmetry in space and time are identified and used to illustrate the application of spatio-temporal groups.
description: accepted by MDPI; 18 pages, 2 ancillary pdf; edits as per reviewer feedback - added generalized listings of groups, references, acknowledgements, and general revisions to text, results unchanged
Exceeding the asymptotic limit of polymer drag reduction
Creators: name: Choueiri, George H.
name: Lopez, Jose M.
name: Hof, Bjoern
Publisher: name: arXiv
Year: 2017
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The drag of turbulent flows can be drastically decreased by addition of small amounts of high molecular weight polymers. While drag reduction initially increases with polymer concentration, it eventually saturates to what is known as the maximum drag reduction (MDR) asymptote; this asymptote is generally attributed to the dynamics being reduced to a marginal yet persistent state of subdued turbulent motion. Contrary to this accepted view we will show in the following that for an appropriate choice of parameters polymers can reduce the drag beyond the suggested asymptotic limit, eliminating turbulence and giving way to laminar flow. However at higher polymer concentrations the laminar state becomes unstable, resulting in a fluctuating flow with the characteristic drag of the MDR asymptote. The asymptotic state is hence dynamically disconnected from ordinary turbulence.
description: 6 pages, 6 figures
Latent Laplacian Maximum Entropy Discrimination for Detection of High-Utility Anomalies
Creators: name: Hou, Elizabeth
name: Sricharan, Kumar
name: Hero, Alfred O.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Machine Learning (stat.ML)
subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Data-driven anomaly detection methods suffer from the drawback of detecting all instances that are statistically rare, irrespective of whether the detected instances have real-world significance or not. In this paper, we are interested in the problem of specifically detecting anomalous instances that are known to have high real-world utility, while ignoring the low-utility statistically anomalous instances. To this end, we propose a novel method called Latent Laplacian Maximum Entropy Discrimination (LatLapMED) as a potential solution. This method uses the EM algorithm to simultaneously incorporate the Geometric Entropy Minimization principle for identifying statistical anomalies, and the Maximum Entropy Discrimination principle to incorporate utility labels, in order to detect high-utility anomalies. We apply our method in both simulated and real datasets to demonstrate that it has superior performance over existing alternatives that independently pre-process with unsupervised anomaly detection algorithms before classifying.
รูปแบบการเรียนการสอนแบบคอนสตรัคติวิสต์เพื่อเสริมสร้างทักษะในการศึกษา เพื่อการพัฒนาที่ยั่งยืนในธุรกิจศึกษา สำหรับนักเรียนมัธยมศึกษาตอนปลาย ของโรงเรียนนานาชาติในประเทศไทย
Creators: name: ปิยะวรรณ สูนาสวน
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: รูปแบบการเรียนการสอน
คอนสตรัคติวิสต์
การศึกษาเพื่อการพัฒนาที่ยั่งยืน
ธุรกิจศึกษา
มัธยมศึกษาตอนปลาย

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 92-107
Results on the spectral stability of standing wave solutions of the Soler model in 1-D
Creators: name: Aldunate, Danko
name: Ricaud, Julien
name: Stockmeyer, Edgardo
name: Bosch, Hanne Van Den
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study the spectral stability of the nonlinear Dirac operator in dimension $1+1$, restricting our attention to nonlinearities of the form $f(\langleψ,βψ\rangle_{\mathbb{C}^2}) β$. We obtain bounds on eigenvalues for the linearized operator around standing wave solutions of the form $e^{-iωt} ϕ_0$. For the case of power nonlinearities $f(s)= s |s|^{p-1}$, $p>0$, we obtain a range of frequencies $ω$ such that the linearized operator has no unstable eigenvalues on the axes of the complex plane. As a crucial part of the proofs, we obtain a detailed description of the spectra of the self-adjoint blocks in the linearized operator. In particular, we show that the condition $\langleϕ_0,βϕ_0\rangle_{\mathbb{C}^2} > 0$ characterizes groundstates analogously to the Schrödinger case.
description: 45 pages, 5 figures
A multistep pulse compressor for 10s to 100s PW lasers
Creators: name: Liu, Jun
name: Shen, Xiong
name: Du, Shuman
name: Li, Ruxin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: High-energy tens (10s) to hundreds (100s) petawatt (PW) lasers are key tools for exploring frontier fundamental researches such as strong-field quantum electrodynamics (QED), and the generation of positron-electron pair from vacuum. Recently, pulse compressor became the main obstacle on achieving higher peak power due to the limitation of damage threshold and size of diffraction gratings. Here, we propose a feasible multistep pulse compressor (MPC) to increase the maximum bearable input and output pulse energies through modifying their spatiotemporal properties. Typically, the new MPC including a prism pair for pre-compression, a four-grating compressor (FGC) for main compression, and a spatiotemporal focusing based self-compressor for post-compression. The prism pair can induce spatial dispersion to smooth and enlarge the laser beam, which increase the maximum input and output pulse energies. As a result, as high as 100 PW laser with single beam or more than 150 PW through combining two beams can be obtained by using MPC and current available optics. This new optical design will simplify the compressor, improve the stability, and save expensive gratings/optics simultaneously. Together with the multi-beam tiled-aperture combining method, the tiled-grating method, larger gratings, or negative chirp pulse based self-compression method, several 100s PW laser beam is expected to be obtained by using this MPC method in the future, which will further extend the ultra-intense laser physics research fields.
description: 18 pages, 10 figures
Complex dimensions and their observability
Creators: name: Calcagni, Gianluca
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the dimension of spacetime becomes complex-valued when its short-scale geometry is invariant under a discrete scaling symmetry. This characteristic can generically arise in quantum gravities, for instance, in those based on combinatorial or multifractal structures or as the partial breaking of continuous dilation symmetry in any conformal-invariant theory. With its infinite scale hierarchy, discrete scale invariance overlaps with the traditional separation between ultraviolet and infrared physics and it can leave an all-range observable imprint, such as a pattern of log oscillations and sharp features in the cosmic microwave background primordial power spectrum.
description: 6 pages, 1 figure. v2: discussion slightly expanded
On the adiabatic theorem when eigenvalues dive into the continuum
Creators: name: Cornean, Horia D.
name: Jensen, Arne
name: Knörr, Hans Konrad
name: Nenciu, Gheorghe
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We consider a reduced two-channel model of an atom consisting of a quantum dot coupled to an open scattering channel described by a three-dimensional Laplacian. We are interested in the survival probability of a bound state when the dot energy varies smoothly and adiabatically in time. The initial state corresponds to a discrete eigenvalue which dives into the continuous spectrum and re-emerges from it as the dot energy is varied in time and finally returns to its initial value. Our main result is that for a large class of couplings, the survival probability of this bound state vanishes in the adiabatic limit. At the end of the paper we present a short outlook on how our method may be extended to cover other classes of Hamiltonians; details will be given elsewhere.
description: 22 pages, 1 figure
Likelihood-based Missing Data Analysis in Crossover Trials
Creators: name: Pareek, Savita
name: Das, Kalyan
name: Mukhopadhyay, Siuli
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: A multivariate mixed-effects model seems to be the most appropriate for gene expression data collected in a crossover trial. It is, however, difficult to obtain reliable results using standard statistical inference when some responses are missing. Particularly for crossover studies, missingness is a serious concern as the trial requires a small number of participants. A Monte Carlo EM (MCEM)-based technique was adopted to deal with this situation. In addition to estimation, MCEM likelihood ratio tests (LRTs) are developed to test fixed effects in crossover models with missing data. Intensive simulation studies were conducted prior to analyzing gene expression data.
Revealing long-range multi-particle collectivity in small collision systems via subevent cumulants
Creators: name: Jia, Jiangyong
name: Zhou, Mingliang
name: Trzupek, Adam
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Multi-particle azimuthal cumulants, often used to study collective flow in high-energy heavy-ion collisions, have recently been applied in small collision systems such as $pp$ and $p$+A to extract the second-order azimuthal harmonic flow $v_2$. Recent observation of four-, six- and eight-particle cumulants with "correct sign" $c_2\{4\}<0, c_2\{6\}>0, c_2\{8\}<0$ and approximate equality of the inferred single-particle harmonic flow, $v_2\{4\}\approx v_2\{6\}\approx v_2\{8\}$, have been used as strong evidence for a collective emission of all soft particles produced in the collisions. We show that these relations in principle could be violated due to the non-Gaussianity in the event-by-event fluctuation of flow and/or non-flow. Furthermore, we show, using $pp$ events generated with the PYTHIA model, that $c_2\{2k\}$ obtained with standard cumulant method are dominated by non-flow from dijets. An alternative cumulant method based on two or more $η$-separated subevents is proposed to suppress the dijet contribution. The new method is shown to be able to recover a flow signal as low as 4\% imposed on the PYTHIA events, independently of how the event activity class is defined. Therefore the subevent cumulant method offers a more robust way of studying collectivity based on the existence of long-range azimuthal correlations between multiple distinct $η$ ranges. The prospect of using the subevent cumulants to study collective flow in A+A collisions, in particular its longitudinal dynamics, is discussed.
description: 23 pages, 10 figures, replace with the published version
A Monte Carlo approach to magnetar-powered transients: II. Broad-lined type Ic supernovae not associated with GRBs
Creators: name: Wang, Ling-Jun
name: Cano, Zach
name: Wang, Shan-Qin
name: Zheng, Weikang
name: Liu, Liang-Duan
name: Deng, J. S.
name: Yu, Hai
name: Dai, Zi-Gao
name: Han, Yan-Hui
name: Xu, Dong
name: Qiu, Yu-Lei
name: Wei, Jian-Yan
name: Li, B.
name: Song, L. M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Broad-lined type Ic supernovae (SNe Ic-BL) are a subclass of rare core collapse SNe whose energy source is debated in the literature. Recently a series of investigations on SNe Ic-BL with the magnetar (plus 56Ni) model were carried out. Evidence for magnetar formation was found for the well-observed SNe Ic-BL 1998bw and 2002ap. In this paper we systematically study a large sample of SNe Ic-BL not associated with gamma-ray bursts. We use photospheric velocity data determined in a homogeneous way. We find that the magnetar+56Ni model provides a good description of the light curves and velocity evolution of our sample of SNe Ic-BL, although some SNe (not all) can also be described by the pure-magnetar model or by the two-component pure-56Ni model (3 out of 12 are unlikely explained by two-component model). In the magnetar+56Ni model, the amount of 56Ni required to explain their luminosity is significantly reduced, and the derived initial explosion energy is, in general, in accordance with neutrino heating. Some correlations between different physical parameters are evaluated and their implications regarding magnetic field amplification and the total energy reservoir are discussed.
description: 17 pages, 10 figures
Fast Back-Projection for Non-Line of Sight Reconstruction
Creators: name: Arellano, Victor
name: Gutierrez, Diego
name: Jarabo, Adrian
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Graphics (cs.GR)
subject: FOS: Computer and information sciences

description: Recent works have demonstrated non-line of sight (NLOS) reconstruction by using the time-resolved signal frommultiply scattered light. These works combine ultrafast imaging systems with computation, which back-projects the recorded space-time signal to build a probabilistic map of the hidden geometry. Unfortunately, this computation is slow, becoming a bottleneck as the imaging technology improves. In this work, we propose a new back-projection technique for NLOS reconstruction, which is up to a thousand times faster than previous work, with almost no quality loss. We base on the observation that the hidden geometry probability map can be built as the intersection of the three-bounce space-time manifolds defined by the light illuminating the hidden geometry and the visible point receiving the scattered light from such hidden geometry. This allows us to pose the reconstruction of the hidden geometry as the voxelization of these space-time manifolds, which has lower theoretic complexity and is easily implementable in the GPU. We demonstrate the efficiency and quality of our technique compared against previous methods in both captured and synthetic data
Nori: Concealing the Concealed Identifier in 5G
Creators: name: Mattsson, John Preuß
name: Nakarmi, Prajwol Kumar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: IMSI catchers have been a long standing and serious privacy problem in pre-5G mobile networks. To tackle this, 3GPP introduced the Subscription Concealed Identifier (SUCI) and other countermeasures in 5G. In this paper, we analyze the new SUCI mechanism and discover that it provides very poor anonymity when used with the variable length Network Specific Identifiers (NSI), which are part of the 5G standard. When applied to real-world name length data, we see that SUCI only provides 1-anonymity, meaning that individual subscribers can easily be identified and tracked. We strongly recommend 3GPP and GSMA to standardize and recommend the use of a padding mechanism for SUCI before variable length identifiers get more commonly used. We further show that the padding schemes, commonly used for network traffic, are not optimal for padding of identifiers based on real names. We propose a new improved padding scheme that achieves much less message expansion for a given $k$-anonymity.
description: 9 pages, 8 figures, 1 table
ผลกระทบภาวะผู้นำเชิงนวัตกรรมที่มีต่อผลการดำเนินงานกลุ่มวิสาหกิจชุมชน ในกลุ่มจังหวัดสนุก
Creators: name: สุภาวิตา สุภาวิตา
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2023
Subjects: ภาวะผู้นำเชิงนวัตกรรม
การดำเนินงานกลุ่มวิสาหกิจชุมชุน
ผลกระทบภาวะผู้นำเชิงนวัตกรรม

description: วารสารมหาวิทยาลัยศิลปากร, 43, 1, 108-121
Study on Fractal Characteristics in the e$^+$e$^-$ Collisions at $\sqrt{s_{NN}}=250$GeV
Creators: name: Ting-ting, Zeng
name: Gang, Chen
name: Zi-jian, Dong
name: Zhi-lei, She
name: Ragab, N. A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The fractal characteristics of multi-particle final state are first studied in the $e^+e^-$ collision of $\sqrt{s_{NN}}=250$GeV, with the MC simulation generator Jetset7.4 and Herwig5.9. The result is shown that this multi-particle final state is self-affine fractal, and exists a double-Hurst-exponent phenomenon. Their fractal indices and the effective fluctuation strength are also predicted.
description: 7 pages, 3 figures
On the emergence of quantum Boltzmann fluctuation dynamics near a Bose-Einstein Condensate
Creators: name: Chen, Thomas
name: Hott, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 82C40, 81T18, 81T08, 81V70, 81T12, 35Q20, 35Q40, 35Q41, 82C10, 82C22, 81Q10, 81T25

description: In this work, we study the quantum fluctuation dynamics in a Bose gas on a torus $Λ=(L\mathbb{T})^3$ that exhibits Bose-Einstein condensation, beyond the leading order Hartree-Fock-Bogoliubov (HFB) fluctuations. Given a Bose-Einstein condensate (BEC) with density $N$ surrounded by thermal fluctuations with density $1$, we assume that the system is described by a mean-field Hamiltonian. We extract a quantum Boltzmann type dynamics from a second-order Duhamel expansion upon subtracting both the BEC dynamics and the HFB dynamics. Using a Fock-space approach, we provide explicit error bounds. It is known that the BEC and the HFB fluctuations both evolve at microscopic time scales $t\sim1$. Given a quasifree initial state, we determine the time evolution of the centered correlation functions $\langle a\rangle$, $\langle aa\rangle-\langle a\rangle^2$, $\langle a^+a\rangle-|\langle a\rangle|^2$ at mesoscopic time scales $t\simλ^{-2}$, where $0<λ\ll1$ denotes the size of the HFB interaction. For large but finite $N$, we consider both the case of fixed system size $L\sim1$, and the case $L\sim λ^{-2-}$. In the case $L\sim1$, we show that the Boltzmann collision operator contains subleading terms that can become dominant, depending on time-dependent coefficients assuming particular values in $\mathbb{Q}$; this phenomenon is reminiscent of the Talbot effect. For the case $L\sim λ^{-2-}$, we prove that the collision operator is well approximated by the expression predicted in the literature. In either of those cases, we have $λ\sim \Big(\frac{\log \log N}{\log N}\Big)^α$, for different values of $α>0$.
description: 120 pages. Added comments after referee report. Accepted for publication in Journal of Statistical Physics
Sensitivities and synergies of DUNE and T2HK
Creators: name: Ballett, Peter
name: King, Stephen F.
name: Pascoli, Silvia
name: Prouse, Nick W.
name: Wang, TseChun
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Long-baseline neutrino oscillation experiments, in particular Deep Underground Neutrino Experiment (DUNE) and Tokai to Hyper-Kamiokande (T2HK), will lead the effort in the precision determination of the as yet unknown parameters of the leptonic mixing matrix. In this article, we revisit the potential of DUNE, T2HK and their combination in light of the most recent experimental information. As well as addressing more conventional questions, we pay particular attention to the attainable precision on δ, which is playing an increasingly important role in the physics case of the long-baseline programme. We analyse the complementarity of the two designs, identify the benefit of a programme comprising distinct experiments and consider how best to optimise the global oscillation programme. This latter question is particularly pertinent in light of a number of alternative design options which have recently been mooted: a Korean second detector for T2HK and different beams options at DUNE. We study the impact of these options and quantify the synergies between alternative proposals, identifying the best means of furthering our knowledge of the fundamental physics of neutrino oscillation.
description: 54 pages, 26 figures
Intrinsic Alignment in redMaPPer clusters -- II. Radial alignment of satellites toward cluster centers
Creators: name: Huang, Hung-Jin
name: Mandelbaum, Rachel
name: Freeman, Peter E.
name: Chen, Yen-Chi
name: Rozo, Eduardo
name: Rykoff, Eli
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the orientations of satellite galaxies in redMaPPer clusters constructed from the Sloan Digital Sky Survey at $0.1
description: 25 pages, 16 figures, 7 tables, accepted to MNRAS. Main statistical analysis tool changed, with the results remain similar
Generalized Gibbs ensemble of the Ablowitz-Ladik lattice, Circular $β$-ensemble and double confluent Heun equation
Creators: name: Grava, Tamara
name: Mazzuca, Guido
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: Spectral Theory (math.SP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 60B20

description: We consider the discrete defocusing nonlinear Schrödinger equation in its integrable version, which is called defocusing Ablowitz-Ladik lattice. We consider periodic boundary conditions with period $N$ and initial data sample according to the Generalized Gibbs ensemble. In this setting, the Lax matrix of the Ablowitz-Ladik lattice is a random CMV-periodic matrix and it is related to the Killip-Nenciu Circular $β$-ensemble at high-temperature. We obtain the generalized free energy of the Ablowitz-Ladik lattice and the density of states of the random Lax matrix by establishing a mapping to the one-dimensional log-gas. For the Gibbs measure related to the Hamiltonian of the Ablowitz-Ladik flow, we obtain the density of states via a particular solution of the double-confluent Heun equation.
description: 33 pages, 1 figures. We corrected some typos, add some references and simplified some proofs
Metallization of colloidal crystals
Creators: name: Ehlen, Ali
name: Lopez-Rios, Hector
name: de la Cruz, Monica Olvera
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Colloidal crystals formed by size-asymmetric binary particles co-assemble into a wide variety of colloidal compounds with lattices akin to ionic crystals. Recently, a transition from a compound phase with a sublattice of small particles to a metal-like phase in which the small particles are delocalized has been predicted computationally and observed experimentally. In this colloidal metallic phase, the small particles roam the crystal maintaining the integrity of the lattice of large particles, as electrons do in metals. A similar transition also occurs in superionic crystals, termed sublattice melting. Here, we use energetic principles and a generalized molecular dynamics model of a binary system of functionalized nanoparticles to analyze the transition to sublattice delocalization in different co-assembled crystal phases as a function of T, number of grafted chains on the small particles, and number ratio between the small and large particles $n_s$:$n_l$. We find that $n_s$:$n_l$ is the primary determinant of crystal type due to energetic interactions and interstitial site filling, while the number of grafted chains per small particle determines the stability of these crystals. We observe first-order sublattice delocalization transitions as T increases, in which the host lattice transforms from low- to high-symmetry crystal structures, including A20 to BCT to BCC, Ad to BCT to BCC, and BCC to BCC/FCC to FCC transitions and lattices. Analogous sublattice transitions driven primarily by lattice vibrations have been seen in some atomic materials exhibiting an insulator-metal transition also referred to as metallization. We also find minima in the lattice vibrations and diffusion coefficient of small particles as a function of $n_s$:$n_l$, indicating enhanced stability of certain crystal structures for $n_s$:$n_l$ values that form compounds.
description: AE and HL-R contributed equally to this work
Per uno statuto scientifico della Public History
Creators: name: Salvatori, Enrica
Publisher: name: Zenodo
Year: 2024

description: La PH è uno dei fenomeni più originali che si sia affermato negli ultimi anni nel campo degli studi storici, in diversi paesi del mondo e anche in Italia. La nascita e lo sviluppo di questa disciplina sono stati accompagnati da numerosi dibattiti relativi alla sua stessa denominazione e definizione, che hanno però riguardato in maniera limitata il suo statuto scientifico. Quello che segue è un tentativo di offrire alla discussione della comunità degli storici in senso lato e in particolare di quanti si ritengono public historian alcuni punti cardine, tesi a dare alla disciplina piena legittimità epistemologica all'interno del più ampio ambito delle scienze storiche.
Temporal-mode measurement tomography of a quantum pulse gate
Creators: name: Ansari, Vahid
name: Harder, Georg
name: Allgaier, Markus
name: Brecht, Benjamin
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Encoding quantum information in the photon temporal mode (TM) offers a robust platform for high-dimensional quantum protocols. The main practical challenge, however, is to design a device that operates on single photons in specific TMs and all coherent superpositions. The quantum pulse gate (QPG) is a mode-selective sum-frequency generation designed for this task. Here, we perform a full modal characterisation of a QPG using weak coherent states in well-defined TMs. We reconstruct a full set of measurement operators, which show an average fidelity of 0.85 to a theoretically ideal device when operating on a 7-dimensional space. Then we use these characterised measurement operators of the QPG to calibrate the device. Using the calibrated device and a tomographically complete set of measurements, we show that the QPG can perform high-dimensional TM state tomography with 0.99 fidelity.
The algebra of conjugacy classes of the wreath product of a finite group with the symmetric group
Creators: name: Tout, Omar
Publisher: name: arXiv
Year: 2021
Subjects: subject: Combinatorics (math.CO)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: For a finite group $G,$ we define the concept of $G$-partial permutation and use it to show that the structure coefficients of the center of the wreath product $G\wr \mathcal{S}_n$ algebra are polynomials in $n$ with non-negative integer coefficients. Our main tool is a combinatorial algebra which projects onto the center of the group $G\wr \mathcal{S}_n$ algebra for every $n.$ This generalizes the Ivanov and Kerov method to prove the polynomiality property for the structure coefficients of the center of the symmetric group algebra.
description: arXiv admin note: text overlap with arXiv:1902.02124
Isospin susceptibility in the O($n$) sigma-model in the delta-regime
Creators: name: Niedermayer, Ferenc
name: Weisz, Peter
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We compute the isospin susceptibility in an effective O($n$) scalar field theory (in $d=4$ dimensions), to third order in chiral perturbation theory ($χ$PT) in the delta--regime using the quantum mechanical rotator picture. This is done in the presence of an additional coupling, involving a parameter $η$, describing the effect of a small explicit symmetry breaking term (quark mass). For the chiral limit $η=0$ we demonstrate consistency with our previous $χ$PT computations of the finite-volume mass gap and isospin susceptibility. For the massive case by computing the leading mass effect in the susceptibility using $χ$PT with dimensional regularization, we determine the $χ$PT expansion for $η$ to third order. The behavior of the shape coefficients for long tube geometry obtained here might be of broader interest. The susceptibility calculated from the rotator approximation differs from the $χ$PT result in terms vanishing like $1/\ell$ for $\ell=L_t/L_s\to\infty$. We show that this deviation can be described by a correction to the rotator spectrum proportional to the square of the quadratic Casimir invariant.
description: 34 pages