cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Shortest Distances as Enumeration Problem
Creators: name: Casel, Katrin
name: Friedrich, Tobias
name: Neubert, Stefan
name: Schmid, Markus L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: Computational Complexity (cs.CC)
subject: FOS: Computer and information sciences

description: We investigate the single source shortest distance (SSSD) and all pairs shortest distance (APSD) problems as enumeration problems (on unweighted and integer weighted graphs), meaning that the elements $(u, v, d(u, v))$ -- where $u$ and $v$ are vertices with shortest distance $d(u, v)$ -- are produced and listed one by one without repetition. The performance is measured in the RAM model of computation with respect to preprocessing time and delay, i.e., the maximum time that elapses between two consecutive outputs. This point of view reveals that specific types of output (e.g., excluding the non-reachable pairs $(u, v, \infty)$, or excluding the self-distances $(u, u, 0)$) and the order of enumeration (e.g., sorted by distance, sorted row-wise with respect to the distance matrix) have a huge impact on the complexity of APSD while they appear to have no effect on SSSD. In particular, we show for APSD that enumeration without output restrictions is possible with delay in the order of the average degree. Excluding non-reachable pairs, or requesting the output to be sorted by distance, increases this delay to the order of the maximum degree. Further, for weighted graphs, a delay in the order of the average degree is also not possible without preprocessing or considering self-distances as output. In contrast, for SSSD we find that a delay in the order of the maximum degree without preprocessing is attainable and unavoidable for any of these requirements.
description: Updated version adds the study of space complexity
Letter from Humphrey J. Case to John Betjeman, July 05, 1971
Creators: name: Case, H. J. (Humphrey J.)
Publisher: name: University of Victoria Libraries
Year: 2023
Subjects: subject: Literature, Modern
valueUri: http://id.worldcat.org/fast/1000172
subject: Poets
valueUri: http://id.worldcat.org/fast/1067778
subject: Authors, English
valueUri: http://id.worldcat.org/fast/821945
subject: Poets, English
valueUri: http://id.worldcat.org/fast/1067870
subject: Modernism (Literature)
valueUri: http://id.worldcat.org/fast/1024455
subject: Authors, English--Correspondence
valueUri: http://id.worldcat.org/fast/821953
subject: Case, H. J. (Humphrey J.)
subject: Authors
valueUri: http://id.worldcat.org/fast/821688
subject: Betjeman, John, 1906-1984
valueUri: http://id.worldcat.org/fast/1427507
subject: Television journalists
valueUri: http://id.worldcat.org/fast/1146949

description: Correspondence between John Betjeman and Humphrey J. Case. Case writes Betjeman that the Upper Thames Archeological Committee has become concerned about the impending destruction of sites in Abingdon. The Abingdon Excavation Committee was formed with the Mayor. They are working on a plan to excavate and record details by a professional archeologist. Case welcomes any advice and also invites Betjeman to join the committee.
Optimizing Neural Architecture Search using Limited GPU Time in a Dynamic Search Space: A Gene Expression Programming Approach
Creators: name: Alves, Jeovane Honorio
name: de Oliveira, Lucas Ferrari
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences

description: Efficient identification of people and objects, segmentation of regions of interest and extraction of relevant data in images, texts, audios and videos are evolving considerably in these past years, which deep learning methods, combined with recent improvements in computational resources, contributed greatly for this achievement. Although its outstanding potential, development of efficient architectures and modules requires expert knowledge and amount of resource time available. In this paper, we propose an evolutionary-based neural architecture search approach for efficient discovery of convolutional models in a dynamic search space, within only 24 GPU hours. With its efficient search environment and phenotype representation, Gene Expression Programming is adapted for network's cell generation. Despite having limited GPU resource time and broad search space, our proposal achieved similar state-of-the-art to manually-designed convolutional networks and also NAS-generated ones, even beating similar constrained evolutionary-based NAS works. The best cells in different runs achieved stable results, with a mean error of 2.82% in CIFAR-10 dataset (which the best model achieved an error of 2.67%) and 18.83% for CIFAR-100 (best model with 18.16%). For ImageNet in the mobile setting, our best model achieved top-1 and top-5 errors of 29.51% and 10.37%, respectively. Although evolutionary-based NAS works were reported to require a considerable amount of GPU time for architecture search, our approach obtained promising results in little time, encouraging further experiments in evolutionary-based NAS, for search and network representation improvements.
description: Accepted for presentation at the IEEE Congress on Evolutionary Computation (IEEE CEC) 2020
title: Bricolage as a Strategy of Pursuing Beauty in the Social Reality of the Polish People’s Republic
Creators: name: Buchner, Anna
name: Kietlińska, Bogna
Publisher: name: Instytut Socjologii Uniwersytetu Wrocławskiego
Year: 2019

description: In 2013, the authors participated in the international research grant titled “Towards the Comparative
Sociology of Beauty: The Transnational Modelling Industry and the Social Shaping of Beauty
Standards in Six European Countries”, which was carried out in Amsterdam, at the Institute for
Social Science of Research (University of Amsterdam), under the direction of Professor Giselinde
Kuipers. Some of the respondents in Poland were women, whose early adulthood took place in the
times of the Polish People’s Republic and the subsequent regime change. After the research had been
concluded, the authors decided to devote more attention to them, and conducted additional interviews with women over fifty, with tertiary education, living in large or medium Polish cities. In this
article, strategies of pursuing beauty in the context of the shortage economy of the Polish People’s
Republic are presented. Based on in-depth interviews, the analysis is framed in terms of bricolage,
a term coined by Claude Lévi-Strauss, as well as of homo eligens and homo egens, which are concepts developed by Polish sociologists. The aim of such applications is to systematise studies
on lifestyles.
Gas and stellar spiral arms and their offsets in the grand-design spiral galaxy M51
Creators: name: Egusa, Fumi
name: Cooper, Erin Mentuch
name: Koda, Jin
name: Baba, Junichi
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Theoretical studies on the response of interstellar gas to a gravitational potential disc with a quasi-stationary spiral arm pattern suggest that the gas experiences a sudden compression due to standing shock waves at spiral arms. This mechanism, called a galactic shock wave, predicts that gas spiral arms move from downstream to upstream of stellar arms with increasing radius inside a corotation radius. In order to investigate if this mechanism is at work in the grand-design spiral galaxy M51, we have measured azimuthal offsets between the peaks of stellar mass and gas mass distributions in its two spiral arms. The stellar mass distribution is created by the spatially resolved spectral energy distribution fitting to optical and near infrared images, while the gas mass distribution is obtained by high-resolution CO and HI data. For the inner region (r < 150"), we find that one arm is consistent with the galactic shock while the other is not. For the outer region, results are less certain due to the narrower range of offset values, the weakness of stellar arms, and the smaller number of successful offset measurements. The results suggest that the nature of two inner spiral arms are different, which is likely due to an interaction with the companion galaxy.
description: 12 pages, 8 figures, 3 tables. MNRAS accepted
Total Coloring for some classes of Cayley graphs
Creators: name: S, Prajnanaswaroopa
name: J, Geetha
name: K, Somasundaram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: Discrete Mathematics (cs.DM)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: G.2.2; G.2.1
subject: 05C15

description: The Total coloring conjecture states that any simple graph G with maximum degree D can be totally colored with at most D+2 colors. In this paper, we have obtained the total chromatic number for some classes of Cayley graphs.
description: 11 pages
Continuity method with movable singularities for classical Monge-Ampère equations
Creators: name: Trusiani, Antonio
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Analysis of PDEs (math.AP)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: On a compact Kähler manifold $(X,ω)$, we study the strong continuity of solutions with prescribed singularities of complex Monge-Ampère equations with integrable Lebesgue densities. Moreover, we give sufficient conditions for the strong continuity of solutions when the right-hand sides are modified to include all (log) Kähler-Einstein metrics with prescribed singularities. Our findings can be interpreted as closedness of new continuity methods in which the densities vary together with the prescribed singularities. For Monge-Ampère equations of Fano type, we also prove an openness result when the singularities decrease. As an application, we deduce a strong stability result for (log-)Kähler Einstein metrics on semi-Kähler classes given as modifications of $\{ω\}$.
description: Proof of Theorem C changed, some typos corrected
title: Finite element mass lumping for H(div) and H(curl)
Creators: name: Radu, Bogdan
Publisher: name: UNSPECIFIED
Year: 2022

description: In this work, we consider the efficient implementation of finite element approximations for porous media, poroelasticity, and wave propagation problems. This is conducted by using mass-lumping, an approximation technique that enables a faster inversion of the mass matrix. This method has been primarily used for discretizing wave propagation problems in H1, as it allows for the efficient application of explicit time-stepping schemes. Another example of the usage of mass-lumping is the mixed finite element discretization of porous medium flow. Here, mass-lumping is utilized to reduce the algebraic saddle-point structure to a symmetric positive definite system, which is a lot easier to solve. In this work, we specifically examine mass-lumping strategies for the functional spaces H(div) and H(curl). In the first part of this thesis, we investigate the discretization of porous medium flow and poroelasticity. We will analyze already existing first-order convergent methods with mass-lumping and propose extensions that have better convergence properties and are optimal in the number of degrees of freedom. We will complement this with a rigorous error analysis, which confirms the accuracy of the method. In the second part, we consider discretization techniques with mass-lumping for the acoustic wave equation in H(div) and for Maxwell's equations in H(curl). Specifically, we will propose first and second-order accurate methods. Moreover, we will propose a new technique for the first-order convergent method that will cut the number of degrees of freedom in half (or even more). For all the methods we propose, we also provide full error convergence analyses. Furthermore, all our results will be validated by numerical experiments.
Drying Pathways of an Evaporating Soft Matter Droplet
Creators: name: Du, Guangle
name: Ye, Fangfu
name: Doi, Masao
name: Meng, Fanlong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Micro-droplets of soft matter solutions have different morphologies upon drying, and can finally become wrinkled, buckled or cavitated particles. We investigate the morphology evolution of a drying soft matter droplet in this work: at the early stage of drying, wrinkling or cavitation instability can occur in the droplet, depending on the comparison between the critical wrinkling and cavitation pressure; at a later stage of drying, no wrinkle will appear if cavitation happens first, while there can still be cavitation if wrinkling happens first. A three-dimensional phase diagram in the space of elastic length, gel layer thickness and weight loss is provided for illustrating these drying pathways of a soft matter droplet, which can guide future fabrications of micro-particles with desired morphologies.
description: 13 pages, 3 figures
An investigation of two decision-consistency indices when used with teacher-constructed mastery tests
Creators: name: Macpherson, Colin R.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Brownian motion of massive black hole binaries and the final parsec problem
Creators: name: Bortolas, E.
name: Gualandris, A.
name: Dotti, M.
name: Spera, M.
name: Mapelli, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Massive black hole binaries (BHBs) are expected to be one of the most powerful sources of gravitational waves (GWs) in the frequency range of the pulsar timing array and of forthcoming space-borne detectors. They are believed to form in the final stages of galaxy mergers, and then harden by slingshot ejections of passing stars. However, evolution via the slingshot mechanism may be ineffective if the reservoir of interacting stars is not readily replenished, and the binary shrinking may come to a halt at roughly a parsec separation. Recent simulations suggest that the departure from spherical symmetry, naturally produced in merger remnants, leads to efficient loss cone refilling, preventing the binary from stalling. However, current N-body simulations able to accurately follow the evolution of BHBs are limited to very modest particle numbers. Brownian motion may artificially enhance the loss cone refilling rate in low-N simulations, where the binary encounters a larger population of stars due its random motion. Here we study the significance of Brownian motion of BHBs in merger remnants in the context of the final parsec problem. We simulate mergers with various particle numbers (from 8k to 1M) and with several density profiles. Moreover, we compare simulations where the BHB is fixed at the centre of the merger remnant with simulations where the BHB is free to random walk. We find that Brownian motion does not significantly affect the evolution of BHBs in simulations with particle numbers in excess of one million, and that the hardening measured in merger simulations is due to collisionless loss cone refilling.
description: 9 pages, 6 figures, 3 tables in Monthly Notices of the Royal Astronomical Society 2016
General solution to nonlinear optical quantum graphs using Dalgarno-Lewis summation techniques
Creators: name: Lytel, Rick
name: Mossman, Sean M.
name: Kuzyk, Mark G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We develop an algorithm to apply the Dalgarno-Lewis (DL) perturbation theory to quantum graphs with multiple, connected edges. We use it to calculate the nonlinear optical hyperpolarizability tensors for graphs and show that it replicates the sum over states computations, but executes ten to fifty times faster. DL requires only knowledge of the ground state of the graph, eliminating the requirement to determine all possible degeneracies of a complex network. The algorithm is general and may be applied to any quantum graph.
A Neptune-sized transiting planet closely orbiting a 5-10-million-year-old star
Creators: name: David, Trevor J.
name: Hillenbrand, Lynne A.
name: Petigura, Erik A.
name: Carpenter, John M.
name: Crossfield, Ian J. M.
name: Hinkley, Sasha
name: Ciardi, David R.
name: Howard, Andrew W.
name: Isaacson, Howard T.
name: Cody, Ann Marie
name: Schlieder, Joshua E.
name: Beichman, Charles A.
name: Barenfeld, Scott A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Theories of the formation and early evolution of planetary systems postulate that planets are born in circumstellar disks, and undergo radial migration during and after dissipation of the dust and gas disk from which they formed. The precise ages of meteorites indicate that planetesimals - the building blocks of planets - are produced within the first million years of a star's life. A prominent question is: how early can one find fully formed planets like those frequently detected on short orbital periods around mature stars? Some theories suggest the in situ formation of planets close to their host stars is unlikely and the existence of such planets is evidence for large scale migration. Other theories posit that planet assembly at small orbital separations may be common. Here we report on a newly-born, transiting planet orbiting its star every 5.4 days. The planet is 50 per cent larger than Neptune, and its mass is less than 3.6 times Jupiter (at 99.7 per cent confidence), with a true mass likely to be within a factor of several of Neptune's. The 5-10 million year old star has a tenuous dust disk extending outwards from about 2 times the Earth-Sun separation, in addition to the large planet located at less than one-twentieth the Earth-Sun separation.
description: Nature, in press. 42 pages, 7 figures, 2 tables
Being a regional director of education
Creators: name: Macpherson, Reynold J.S.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
Interdisciplinary research and technological impact: Evidence from biomedicine
Creators: name: Ke, Qing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Digital Libraries (cs.DL)
subject: Computers and Society (cs.CY)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: Interdisciplinary research (IDR) has been considered as an important source for scientific breakthroughs and as a solution to today's complex societal challenges. While ample empirical evidence has suggested its benefits within the academia such as better creativity and higher scientific impact and visibility, its societal benefits -- a key argument originally used for promoting IDR -- remain relatively unexplored. Here, we study one aspect of societal benefits, that is contributing to the development of patented technologies, and examine how IDR papers are referenced as "prior art" by patents over time. We draw on a large sample of biomedical papers published in 23 years and measure the degree of interdisciplinarity of a paper using three popular indicators, namely variety, balance, and disparity. We find that papers that cites more fields (variety) and whose distributions over those cited fields are more even (balance) are more likely to receive patent citations, but both effects can be offset if papers draw upon more distant fields (disparity). These associations are consistent across different citation-window lengths. We further find that conditional on receiving patent citations, the intensity of their technological impact, as measured as both raw and quality-adjusted number of citing patents, increases with balance and disparity. Our work may have policy implications for interdisciplinary research and scientific and technological impact.
Spatio-temporal wavefront shaping in a microwave cavity
Creators: name: del Hougne, Philipp
name: Lemoult, Fabrice
name: Fink, Mathias
name: Lerosey, Geoffroy
Publisher: name: arXiv
Year: 2016
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Controlling waves in complex media has become a major topic of interest, notably through the concepts of time reversal and wavefront shaping. Recently, it was shown that spatial light modulators can counter-intuitively focus waves both in space and time through multiple scattering media when illuminated with optical pulses. In this letter we transpose the concept to a microwave cavity using flat arrays of electronically tunable resonators. We prove that maximizing the Green's function between two antennas at a chosen time yields diffraction limited spatio-temporal focusing. Then, changing the photons' dwell time inside the cavity, we modify the relative distribution of the spatial and temporal degrees of freedom (DoF), and we demonstrate that it has no impact on the field enhancement: wavefront shaping makes use of all available DoF, irrespective of their spatial or temporal nature. Our results prove that wavefront shaping using simple electronically reconfigurable arrays of reflectors is a viable approach to the spatio-temporal control of microwaves, with potential applications in medical imaging, therapy, telecommunications, radar or sensing. They also offer new fundamental insights regarding the coupling of spatial and temporal DoF in complex media.
description: 12 pages, 4 figures
The K-band luminosity functions of cluster galaxies
Creators: name: De Propris, R.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive the galaxy luminosity function in the $K_s$ band for galaxies in 24 clusters to provide a local reference for higher redshift studies and to analyse how and if the luminosity function varies according to environment and cluster properties. We use new, deep $K$ band imaging and match the photometry to available redshift information and to optical photometry from the SDSS or the UKST/POSS: $>80\%$ of the galaxies to $K \sim 14.5$ have measured redshifts. We derive composite luminosity functions, for the entire sample and for cluster subsamples . We consider the luminosity functions for red sequence and blue cloud galaxies. The full composite luminosity function has $K^*=12.79 \pm 0.14$ ($M_K=-24.81$) and $α=-1.41 \pm 0.10$. We find that $K^*$ is largely unaffected by the environment but that the slope $α$ increases towards lower mass clusters and clusters with Bautz-Morgan type $
description: 10 pages, 6 figures plus on-line appendix. Accepted in MNRAS
Improved bounds for noisy group testing with constant tests per item
Creators: name: Gebhard, Oliver
name: Johnson, Oliver
name: Loick, Philipp
name: Rolvien, Maurice
Publisher: name: arXiv
Year: 2020
Subjects: subject: Information Theory (cs.IT)
subject: Discrete Mathematics (cs.DM)
subject: FOS: Computer and information sciences

description: The group testing problem is concerned with identifying a small set of infected individuals in a large population. At our disposal is a testing procedure that allows us to test several individuals together. In an idealized setting, a test is positive if and only if at least one infected individual is included and negative otherwise. Significant progress was made in recent years towards understanding the information-theoretic and algorithmic properties in this noiseless setting. In this paper, we consider a noisy variant of group testing where test results are flipped with certain probability, including the realistic scenario where sensitivity and specificity can take arbitrary values. Using a test design where each individual is assigned to a fixed number of tests, we derive explicit algorithmic bounds for two commonly considered inference algorithms and thereby naturally extend the results of Scarlett \& Cevher (2016) and Scarlett \& Johnson (2020). We provide improved performance guarantees for the efficient algorithms in these noisy group testing models -- indeed, for a large set of parameter choices the bounds provided in the paper are the strongest currently proved.
Hawking-like radiation and the density matrix for an infalling observer during gravitational collapse
Creators: name: Saini, Anshul
name: Stojkovic, Dejan
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study time-dependant Hawking-like radiation as seen by an infalling observer during gravitational collapse of a thin shell. We calculate the occupation number of particles whose frequencies are measured in the proper time of an infalling observer in Eddington-Finkelstein coordinates. We solve the equations for the whole process from the beginning of the collapse till the moment when the collapsing shell reaches zero radius. The radiation distribution is not thermal in the whole frequency regime, but it is approximately thermal for the wavelengths of the order of the Schwarzschild radius of the collapsing shell. After the Schwarzschild radius is crossed, the temperature increases without limits as the singularity is approached. We also calculate the density matrix associated with this radiation. It turns out that the off-diagonal correlation terms to the diagonal Hawking's leading order terms are very important. While the trace of the diagonal (Hawking's) density matrix squared decreases during the evolution, the trace of the total density matrix squared remains unity at all times and all frequencies.
On the Okounkov-Olshanski formula for standard tableaux of skew shapes
Creators: name: Morales, Alejandro H.
name: Zhu, Daniel G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: The classical hook length formula counts the number of standard tableaux of straight shapes. In 1996, Okounkov and Olshanski found a positive formula for the number of standard Young tableaux of a skew shape. We prove various properties of this formula, including three determinantal formulas for the number of nonzero terms, an equivalence between the Okounkov-Olshanski formula and another skew tableaux formula involving Knutson-Tao puzzles, and two $q$-analogues for reverse plane partitions, which complements work by Stanley and Chen for semistandard tableaux. We also give several reformulations of the formula, including two in terms of the excited diagrams appearing in a more recent skew tableaux formula by Naruse. Lastly, for thick zigzag shapes we show that the number of nonzero terms is given by a determinant of the Genocchi numbers and improve on known upper bounds by Morales-Pak-Panova on the number of standard tableaux of these shapes.
description: 53 pages, 7 figures, v3 an expanded Section 9.8, has updated references, and using the journal style file
The segregation of starless and protostellar clumps in the Hi-GAL l=224deg region
Creators: name: Olmi, L.
name: Cunningham, M.
name: Elia, D.
name: Jones, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Stars form in dense, dusty structures, which are embedded in larger clumps of molecular clouds often showing a clear filamentary structure on large scales (> 1pc). One of the best-studied regions in the Hi-GAL survey can be observed toward the l=224deg field. Here, a filamentary region has been studied and it has been found that protostellar clumps are mostly located along the main filament, whereas starless clumps are detected off this filament and are instead found on secondary, less prominent filaments. We want to investigate this segregation effect and how it may affect the clumps properties. We mapped the 12CO(1-0) line and its main three isotopologues toward the two most prominent filaments observed toward the l=224deg field using the Mopra radio telescope, in order to set observational constraints on the dynamics of these structures and the associated starless and protostellar clumps. Compared to the starless clumps, the protostellar clumps are more luminous, more turbulent and lie in regions where the filamentary ambient gas shows larger linewidths. We see evidence of gas flowing along the main filament, but we do not find any signs of accretion flow from the filament onto the Hi-GAL clumps. We analyze the radial column density profile of the filaments and their gravitational stability. The more massive and highly fragmented main filament appears to be thermally supercritical and gravitationally bound, assuming that all of the non-thermal motion is contributing thermal-like support, suggesting a later stage of evolution compared to the secondary filament. The status and evolutionary phase of the Hi-GAL clumps would then appear to correlate with that of the host filament.
description: Accepted for publication on "Astronomy and Astrophysics"
The QCD Static Energy using Optimal Renormalization and Asymptotic Padé-approximant Methods
Creators: name: Ananthanarayan, B.
name: Das, Diganta
name: Khan, M. S. A. Alam
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The perturbative QCD static potential and ultrasoft contributions, which together give the static energy, have been calculated to three- and four-loop order respectively, by several authors. Using the renormalization group, and Padé approximants, we estimate the four-loop corrections to the static energy. We also employ the optimal renormalization method and resum the logarithms of the perturbative series in order to reduce sensitivity to the renormalization scale in momentum space. This is the first application of the method to results at these orders. The convergence behaviour of the perturbative series is also improved in position space using the Restricted Fourier Transform scheme. Using optimal renormalization, we have extracted the value of $Λ^{\overline{\textrm{MS}}}_{\textrm{QCD}}$ at different scales for two active flavours by matching to the static energy from lattice QCD simulations.
description: 16 pages, 3 figures, 3 tables. Version published in Phys.Rev.D
A Survey of Privacy Attacks in Machine Learning
Creators: name: Rigaki, Maria
name: Garcia, Sebastian
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: As machine learning becomes more widely used, the need to study its implications in security and privacy becomes more urgent. Although the body of work in privacy has been steadily growing over the past few years, research on the privacy aspects of machine learning has received less focus than the security aspects. Our contribution in this research is an analysis of more than 40 papers related to privacy attacks against machine learning that have been published during the past seven years. We propose an attack taxonomy, together with a threat model that allows the categorization of different attacks based on the adversarial knowledge, and the assets under attack. An initial exploration of the causes of privacy leaks is presented, as well as a detailed analysis of the different attacks. Finally, we present an overview of the most commonly proposed defenses and a discussion of the open problems and future directions identified during our analysis.
description: Edit to add DOI. Accepted in ACM Computing Surveys, please cite the journal version
Implicit reconstructions of thin leaf surfaces from large, noisy point clouds
Creators: name: Whebell, Riley M.
name: Moroney, Timothy J.
name: Turner, Ian W.
name: Pethiyagoda, Ravindra
name: McCue, Scott W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Thin surfaces, such as the leaves of a plant, pose a significant challenge for implicit surface reconstruction techniques, which typically assume a closed, orientable surface. We show that by approximately interpolating a point cloud of the surface (augmented with off-surface points) and restricting the evaluation of the interpolant to a tight domain around the point cloud, we need only require an orientable surface for the reconstruction. We use polyharmonic smoothing splines to fit approximate interpolants to noisy data, and a partition of unity method with an octree-like strategy for choosing subdomains. This method enables us to interpolate an N-point dataset in O(N) operations. We present results for point clouds of capsicum and tomato plants, scanned with a handheld device. An important outcome of the work is that sufficiently smooth leaf surfaces are generated that are amenable for droplet spreading simulations.
V2I-Based Platooning Design with Delay Awareness
Creators: name: Wang, Lifeng
name: Duan, Yu
name: Lai, Yun
name: Mu, Shizhuo
name: Li, Xiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: This paper studies the vehicle platooning system based on vehicle-to-infrastructure (V2I) communication, where all the vehicles in the platoon upload their driving state information to the roadside unit (RSU), and RSU makes the platoon control decisions with the assistance of edge computing. By addressing the delay concern, a platoon control approach is proposed to achieve plant stability and string stability. The effects of the time headway, communication and edge computing delays on the stability are quantified. The velocity and size of the stable platoon are calculated, which show the impacts of the radio parameters such as massive MIMO antennas and frequency band on the platoon configuration. The handover performance between RSUs in the V2I-based platooning system is quantified by considering the effects of the RSU's coverage and platoon size, which demonstrates that the velocity of a stable platoon should be appropriately chosen, in order to meet the V2I's Quality-of-Service and handover constraints.
A New Connective in Natural Deduction, and its Application to Quantum Computing
Creators: name: Díaz-Caro, Alejandro
name: Dowek, Gilles
Publisher: name: arXiv
Year: 2020
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: We investigate an unsuspected connection between logical connectives with non-harmonious deduction rules, such as Prior's tonk, and quantum computing. We argue that these connectives model the information-erasure, the non-reversibility, and the non-determinism that occur, among other places, in quantum measurement. We introduce an intuitionistic propositional logic with a non-harmonious logical connective sup and two interstitial rules, and show that the proof language of this logic forms the core of a quantum programming language.
description: Accepted at TCS
Theoretical Study Of The Effects Of Magnetic Field Geometry On The High-Energy Emission Of Blazars
Creators: name: Joshi, Manasvita
name: Marscher, Alan P.
name: Boettcher, Markus
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The knowledge of the structure of the magnetic field inside a blazar jet, as deduced from polarization observations at radio to optical wavelengths, is closely related to the formation and propagation of relativistic jets that result from accretion onto supermassive black holes. However, a largely unexplored aspect of the theoretical understanding of radiation transfer physics in blazar jets has been the magnetic field geometry as revealed by the polarized emission and the connection between the variability in polarization and flux across the spectrum. Here, we explore the effects of various magnetic geometries that can exist inside a blazar jet: parallel, oblique, toroidal, and tangled. We investigate the effects of changing the orientation of the magnetic field, according to the above-mentioned geometries, on the resulting high-energy spectral energy distributions (SEDs) and spectral variability patterns (SVPs) of a typical blazar. We use the MUlti-ZOne Radiation Feedback (MUZORF) model of Joshi et al. (2014) to carry out this study and to relate the geometry of the field to the observed SEDs at X-ray and gamma-ray energies. One of the goals of the study is to understand the relationship between synchrotron and inverse Compton peaks in blazar SEDs and the reason for the appearance of gamma-ray "orphan flares" observed in some blazars. This can be associated with the directionality of the magnetic field, which creates a difference in the radiation field as seen by an observer versus that seen by the electrons in the emission region.
description: 9 pages, 9 figures, accepted in the journal Galaxies. Conference proceedings for "Blazars through Sharp Multi-wavelength Eyes"
Searching for heavy neutral lepton and lepton number violation through VBS at high-energy muon colliders
Creators: name: Li, Tong
name: Yao, Chang-Yuan
name: Yuan, Man
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: muon, storage ring
lepton number, violation
vector boson, scattering
double-beta decay, neutrinoless
signature
lepton
Majorana
annihilation
electroweak interaction
same sign
mixing
gauge boson

description: High-energy muon collider can play as an emitter of electroweak gauge bosons and thus leads to substantial vector boson scattering (VBS) processes. In this work, we investigate the production of heavy neutral lepton (HNL) $N$ and lepton number violation (LNV) signature through VBS at high-energy muon colliders. VBS induces LNV processes $W^\pm Z/\gamma\to \ell^\pm N \to \ell^\pm \ell^\pm W^\mp\to \ell^\pm \ell^\pm q\bar{q}'$ with an on-shell HNL $N$ at $\mu^+\mu^-$ colliders. In analogy to neutrinoless double-beta decay with the HNL in t-channel, the LNV signature $W^+W^+\to \ell^+\ell^+$ can also happen via VBS at same-sign muon collider. They provide clean and robust LNV signatures to tell the nature of Majorana HNLs and thus have more advantageous benefits than direct $\mu\mu$ annihilation. We analyze the potential of searching for Majorana HNL and obtain the exclusion limits on mixing $V_{\ell N}$.
Inflexible $CR$ submanifolds
Creators: name: Brinkschulte, Judith
name: Hill, C. Denson
Publisher: name: arXiv
Year: 2016
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32V30, 32V40

description: In this paper we introduce the concept of inflexible $CR$ submanifolds. These are $CR$ submanifolds of some complex Euclidean space such that any compactly supported $CR$ deformation is again globally $CR$ embeddable into some complex Euclidean space. Our main result is that any $2$-pseudoconcave quadratic $CR$ submanifold of type $(n,d)$ in $\mathbb{C}^{n+d}$ is inflexible.
description: to appear in Math. Zeitschrift
Balancing Innovation and Responsibility: The e-DIPLOMA Project's Approach to Ethical, Inclusive, Accessible, and Sustainable Research.
Creators: name: Gómez-Cambronero, Águeda
name: Remolar, Inmaculada
name: Pata, Kai
name: Eisemann, Elmar
name: Szécsi, László
name: Alcañiz, Mariano
name: Trayanova, Tania
name: Sotiris Themistocleous
name: Libera, Enrico
name: Ibañez, Francisco
Publisher: name: Zenodo
Year: 2023
Subjects: Responsible Research and Innovation
ethics
gender equality
transparency
accessibility

description: This poster includes project motivation, primary objective and methodology developed at e-DIPLOMA project and emphasize the Responsible Research and Innovation actions implemented in the project. e-DIPLOMA ensures the consideration of ethics, gender equality, legal aspects, and data privacy as well as it prioritizes transparency and accessibility. Project website: https://e-diplomaproject.eu/
Optimal asymptotic of the $J$ functional with respect to the $d_1$ metric
Creators: name: Darvas, Tamás
name: George, Erin
name: Smith, Kevin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Differential Geometry (math.DG)
subject: Complex Variables (math.CV)
subject: FOS: Mathematics

description: We obtain sharp inequalities between the large scale asymptotic of the $J$ functional with respect to the $d_1$ metric on the space of Kahler metrics. Applications regarding the initial value problem for geodesic rays are presented.
The MAGNEX spectrometer: results and perspectives
Creators: name: Cappuzzello, F.
name: Agodi, C.
name: Carbone, D.
name: Cavallaro, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: This article discusses the main achievements and future perspectives of the MAGNEX spectrometer at the INFN-LNS laboratory in Catania (Italy). MAGNEX is a large acceptance magnetic spectrometer for the detection of the ions emitted in nuclear collisions below Fermi energy. In the first part of the paper an overview of the MAGNEX features is presented. The successful application to the precise reconstruction of the momentum vector, to the identification of the ion masses and to the determination of the transport efficiency is demonstrated by in-beam tests. In the second part, an overview of the most relevant scientific achievements is given. Results from nuclear elastic and inelastic scattering as well as from transfer and charge exchange reactions in a wide range of masses of the colliding systems and incident energies are shown. The role of MAGNEX in solving old and new puzzles in nuclear structure and direct reaction mechanisms is emphasized. One example is the recently observed signature of the long searched Giant Pairing Vibration. Finally, the new challenging opportunities to use MAGNEX for future experiments are briefly reported. In particular, the use of double charge exchange reactions toward the determination of the nuclear matrix elements entering in the expression of the half-life of neutrinoless double beta decay is discussed. The new NUMEN project of INFN, aiming at these investigations, is introduced. The challenges connected to the major technical upgrade required by the project in order to investigate rare processes under high fluxes of detected heavy ions are outlined.
description: Review article
Cognitive preferences and achievement in physics
Creators: name: Mackay, Lindsay D.
Publisher: name: Monash University
Year: 2021

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the Reference field.
A method for fabricating a micro-structured surface of polyimide with open and closed pores
Creators: name: Ma, Yong-Won
name: Oh, Jae Yong
name: Ahn, Seokyoung
name: Shin, Bo Sung
Publisher: name: arXiv
Year: 2016
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A new approach for fabricating open and closed porous structures based on laser processing is presented. Liquid polyimide (PI) was mixed with azodicarbonamide (ADC, ADA) which is a chemical blowing agent (CBA) and mixture was pre-cured in order to fabricate solid PI film. Porous PI was prepared by irradiating PI film mixed with azodicarbonamide. The PI film with azodicarbonamide was etched by laser ablation, and the CBA was decomposed by heat induced by the absorbed laser energy. The higher the laser beam irradiation, the more pores were fabricated due to the resulting increase in CBA decomposition from 27 mJ/cm2 to 40 mJ/cm2 per single pulse. Higher fluence at about 50 mJ/cm2 resulted in fewer and larger open pores, which were formed by the coalescence of small pores. In contrast, a closed porous structure was fabricated at a fluence of less than 1 mJ/cm2 because PI was barely etched. The proposed method can be sued to create open and closed micro porous structures selectively, and is not limited to thermosetting polymers, but is also effective with thermoplastic polymers.
Generation of the Single Precision BLAS library for the Parallella platform, with Epiphany co-processor acceleration, using the BLIS framework
Creators: name: Tasende, Miguel
Publisher: name: arXiv
Year: 2016
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: The Parallella is a hybrid computing platform that came into existence as the result of a Kickstarter project by Adapteva. It is composed of the high performance, energy-efficient, manycore architecture, Epiphany chip (used as co-processor) and one Zynq-7000 series chip, which normally runs a regular Linux OS version, serves as the main processor, and implements "glue logic" in its internal FPGA to communicate with the many interfaces in the Parallella. In this paper an Epiphany-accelerated BLAS library for the Parallella platform was created (which could be suitable, also, for similar hybrid platforms that include the Epiphany chip as a coprocessor). For the actual instantiation of the BLAS, the BLIS framework was used. There have been previous implementations of Matrix-Matrix multiplication, on this platform, that achieved very good performances inside the Epiphany chip (up to 85% of peak), but not so good ones for the complete Parallella platform (due to inter-chip data transfer bandwidth limitations). The main purpose of this work was to get closer to practical Linear Algebra aplications for the entire Parallella platform, with scientific computing in view.
description: 8 pages, 9 figures, conference manuscript for IEEE DataCom 2016 (Auckland, New Zealand)
Comment on "On Uniqueness of SDE Decomposition in A-type Stochastic Integration" [arXiv:1603.07927v1]
Creators: name: Zhou, Peijie
name: Li, Tiejun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Mathematical Physics (math-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The uniqueness issue of SDE decomposition theory proposed by Ao and his co-workers has recently been discussed. A comprehensive study to investigate connections among different landscape theories [J. Chem. Phys. 144, 094109 (2016)] has pointed out that the decomposition is generally not unique, while Ao et al. (arXiv:1603.07927v1) argues that such conclusions are "incorrect" because of the missing boundary conditions. In this comment, we will combine literatures research and concrete examples to show that the concrete and effective boundary conditions have not been proposed to guarantee the uniqueness, hence the arguments in [arXiv:1603.07927v1] are not sufficient. Moreover, we show that the "uniqueness" of the O-U process decomposition referred by YTA paper is unable to serve as a counterexample to ZL's result since additional assumptions have been made implicitly beyond the original SDE decomposition framework, which cannot be applied to general nonlinear cases. Some other issues such as the failure of gradient expansion method will also be discussed. Our demonstration contributes to better understanding of the relevant papers as well as the SDE decomposition theory.
description: 12 pages, 1 figure