cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Analogy Between Surface Shock Waves in a Liquid and Shocks in Compressible Gases
Creators: name: Crossley, Harry Eastwood
Publisher: name: California Institute of Technology
Year: 1950
Subjects: subject: (Mechanical Engineering)
subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: It has been known for some time that an analogy exists between t he flow of a liquid with a free surface and the flow of a compressible gas. A less accurate analogy has been shown to obtain between hydraulic jumps and compression shocks. The interaction of shocks can occur in two forms, the regular or two-shock configuration and the Mach or three-shock configuration. The latter configuration is not yet completely understood, either in the case of hydraulic jumps in a free-surface liquid or in the case of shocks in a compressible gas. This experimental study was primarily concerned with the Mach interactions of hydraulic jumps. The conclusions of this study are: (a) there is a definite disagreement between experiment and existing theory; (b) a depth discontinuity, or wave, rather than a velocity discontinuity separates the region behind the Mach wave from the region behind the reflected wave; (c) there is evidence t hat, for interactions of weak hydraulic jumps, there is a deviation from constant depth between waves; ( d) the Mach wave is convex for the interaction of the stronger hydraulic jumps, but is concave for the interaction of weak hydraulic jumps (e) measurements should not be made so as to allow for curvature of the Mach without considering the curvature of the incident and reflected waves in the neighborhood of the triple point.
Supplementary document for Three-Dimensional Multifocal Scanning Microscopy for Super-Resolution Cell and Tissue Imaging - 6688071.pdf
Creators: name: Jia, Shu
name: Tadesse, Kidan
name: Han, Keyi
name: Mandracchia, Biagio
name: Yoon, Kyungduck
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Supplemental Document
Symmetry Protected Topological phases of Quantum Matter
Creators: name: Senthil, T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We describe recent progress in our understanding of the interplay between interactions, symmetry, and topology in states of quantum matter. We focus on a minimal generalization of the celebrated topological band insulators to interacting many particle systems, known as Symmetry Protected Topological (SPT) phases. In common with the topological band insulators these states have a bulk gap and no exotic excitations but have non-trivial surface states that are protected by symmetry. We describe the various possible such phases and their properties in three dimensional systems with realistic symmetries. We develop many key ideas of the theory of these states using simple examples. The emphasis is on physical rather than mathematical properties. We survey insights obtained from the study of SPT phases for a number of other theoretical problems.
description: Invited Review for Annual Reviews of Condensed Matter Physics
Supernova Bounds on Weinberg's Goldstone Bosons
Creators: name: Keung, Wai-Yee
name: Ng, Kin-Wang
name: Tu, Huitzu
name: Yuan, Tzu-Chiang
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recently, Weinberg proposed a scenario where Goldstone bosons may be masquerading as fractional cosmic neutrinos. We calculate the energy loss rates through the emission of these Goldstone bosons in a post-collapse supernova core. Invoking the well established emissivity bound from the Supernova 1987A observations and simulations, we find that nuclear bremsstrahlung processes can notably impose a bound on the Goldstone boson coupling to the Standard Model Higgs, $g$, dependent on the mass of the associated radial field, $m_r$. For $m_r$ large enough compared with the temperature in the post-collapse supernova core, our bound is $|g| \lesssim 0.011\, (m_r / 500~{\rm MeV})^2$, very competitive to that derived from collider experiments.
description: 9 pages, 1 figure
Variable Forgetting in Reasoning about Knowledge
Creators: name: Su, Kaile
name: Sattar, Abdul
name: Lv, Guanfeng
name: Zhang, Yan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: In this paper, we investigate knowledge reasoning within a simple framework called knowledge structure. We use variable forgetting as a basic operation for one agent to reason about its own or other agents\ knowledge. In our framework, two notions namely agents\ observable variables and the weakest sufficient condition play important roles in knowledge reasoning. Given a background knowledge base and a set of observable variables for each agent, we show that the notion of an agent knowing a formula can be defined as a weakest sufficient condition of the formula under background knowledge base. Moreover, we show how to capture the notion of common knowledge by using a generalized notion of weakest sufficient condition. Also, we show that public announcement operator can be conveniently dealt with via our notion of knowledge structure. Further, we explore the computational complexity of the problem whether an epistemic formula is realized in a knowledge structure. In the general case, this problem is PSPACE-hard; however, for some interesting subcases, it can be reduced to co-NP. Finally, we discuss possible applications of our framework in some interesting domains such as the automated analysis of the well-known muddy children puzzle and the verification of the revised Needham-Schroeder protocol. We believe that there are many scenarios where the natural presentation of the available information about knowledge is under the form of a knowledge structure. What makes it valuable compared with the corresponding multi-agent S5 Kripke structure is that it can be much more succinct.
Supplementary document for Enhancing the external quantum efficiency of Schottky barrier photodetectors through thin copper films - 6652724.pdf
Creators: name: Seok, Jongeun
name: Jin, Yeonghoon
name: Yu, Kyoungsik
Publisher: name: Optica Publishing Group
Year: 2023
Subjects: Uncategorized

description: Extraction of parameters in forward bias, Distributions of hot electrons (Pdis), Detectivity and photocurrent-dependent power, Effective mean free path (MFP) of electrons, Description of internal quantum efficiency (IQE) tendency in Cu SBPDs
Distance Determinations to SHIELD Galaxies from HST Imaging
Creators: name: McQuinn, Kristen. B. W.
name: Cannon, John M.
name: Dolphin, Andrew E.
name: Skillman, Evan D.
name: Salzer, John J.
name: Haynes, Martha P.
name: Adams, Elizabeth
name: Cave, Ian
name: Elson, Ed C.
name: Giovanelli, Riccardo
name: Ott, Juërgen
name: Saintonge, Amélie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Survey of HI in Extremely Low-mass Dwarf galaxies (SHIELD) is an on-going multi-wavelength program to characterize the gas, star formation, and evolution in gas-rich, very low-mass galaxies. The galaxies were selected from the first ~10% of the HI ALFALFA survey based on their inferred low HI mass and low baryonic mass, and all systems have recent star formation. Thus, the SHIELD sample probes the faint end of the galaxy luminosity function for star-forming galaxies. Here, we measure the distances to the 12 SHIELD galaxies to be between 5-12 Mpc by applying the tip of the red giant method to the resolved stellar populations imaged by the Hubble Space Telescope. Based on these distances, the HI masses in the sample range from $4\times10^6$ to $6\times10^7$ M$_{\odot}$, with a median HI mass of $1\times10^7$ M$_{\odot}$. The TRGB distances are up to 73% farther than flow-model estimates in the ALFALFA catalog. Because of the relatively large uncertainties of flow model distances, we are biased towards selecting galaxies from the ALFALFA catalog where the flow model underestimates the true distances. The measured distances allow for an assessment of the native environments around the sample members. Five of the galaxies are part of the NGC 672 and NGC 784 groups, which together constitute a single structure. One galaxy is part of a larger linear ensemble of 9 systems that stretches 1.6 Mpc from end to end. Two galaxies reside in regions with 1-4 neighbors, and four galaxies are truly isolated with no known system identified within a radius of 1 Mpc.
description: 15 pages, 6 figures, 2 tables
Direct asymmetry measurement of temperature and density spatial distributions in inertial confinement fusion plasmas from pinhole space-resolved spectra
Creators: name: Nagayama, T.
name: Mancini, R. C.
name: Florido, R.
name: Mayes, D.
name: Tommasini, R.
name: Koch, J. A.
name: Delettrez, J. A.
name: Regan, S. P.
name: Smalyuk, V. A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Two-dimensional space-resolved temperature and density images of an inertial confinement fusion (ICF) implosion core have been diagnosed for the first time. Argon-doped, direct-drive ICF experiments were performed at the Omega Laser Facility and a collection of two-dimensional space-resolved spectra were obtained from an array of gated, spectrally resolved pinhole images recorded by a multi-monochromatic x-ray imager. Detailed spectral analysis revealed asymmetries of the core not just in shape and size but in the temperature and density spatial distributions, thus characterizing the core with an unprecedented level of detail.
description: Published online 7 May 2014
Trust-Based Mechanisms for Robust and Efficient Task Allocation in the Presence of Execution Uncertainty
Creators: name: Ramchurn, Sarvapali Dyanand
name: Mezzetti, Claudio
name: Giovannucci, Andrea
name: Rodriguez-Aguilar, Juan Antonio
name: Dash, Rajdeep Kumar
name: Jennings, Nicholas Robert
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: Vickrey-Clarke-Groves (VCG) mechanisms are often used to allocate tasks to selfish and rational agents. VCG mechanisms are incentive compatible, direct mechanisms that are efficient (i.e., maximise social utility) and individually rational (i.e., agents prefer to join rather than opt out). However, an important assumption of these mechanisms is that the agents will "always" successfully complete their allocated tasks. Clearly, this assumption is unrealistic in many real-world applications, where agents can, and often do, fail in their endeavours. Moreover, whether an agent is deemed to have failed may be perceived differently by different agents. Such subjective perceptions about an agents probability of succeeding at a given task are often captured and reasoned about using the notion of "trust". Given this background, in this paper we investigate the design of novel mechanisms that take into account the trust between agents when allocating tasks. Specifically, we develop a new class of mechanisms, called "trust-based mechanisms", that can take into account multiple subjective measures of the probability of an agent succeeding at a given task and produce allocations that maximise social utility, whilst ensuring that no agent obtains a negative utility. We then show that such mechanisms pose a challenging new combinatorial optimisation problem (that is NP-complete), devise a novel representation for solving the problem, and develop an effective integer programming solution (that can solve instances with about 2x10^5 possible allocations in 40 seconds).
Formation of a topological non-Fermi liquid in MnSi
Creators: name: Ritz, R.
name: Halder, M.
name: Wagner, M.
name: Franz, C.
name: Bauer, A.
name: Pfleiderer, C.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Fermi liquid theory provides a remarkably powerful framework for the description of the conduction electrons in metals and their ordering phenomena, such as superconductivity, ferromagnetism, and spin- and charge-density-wave order. A different class of ordering phenomena of great interest concerns spin configurations that are topologically protected, that is, their topology can be destroyed only by forcing the average magnetization locally to zero. Examples of such configurations are hedgehogs (points at which all spins are either pointing inwards or outwards) or vortices. A central question concerns the nature of the metallic state in the presence of such topologically distinct spin textures. Here we report a high-pressure study of the metallic state at the border of the skyrmion lattice in MnSi, which represents a new form of magnetic order composed of topologically non-trivial vortices. When long-range magnetic order is suppressed under pressure, the key characteristic of the skyrmion lattice - that is, the topological Hall signal due to the emergent magnetic flux associated with their topological winding - is unaffected in sign or magnitude and becomes an important characteristic of the metallic state. The regime of the topological Hall signal in temperature, pressure and magnetic field coincides thereby with the exceptionally extended regime of a pronounced non-Fermi-liquid resistivity. The observation of this topological Hall signal in the regime of the NFL resistivity suggests empirically that spin correlations with non-trivial topological character may drive a breakdown of Fermi liquid theory in pure metals.
Monitoring superparamagnetic Langevin behavior of individual ${\rm SrRuO_3}$ nanostructures
Creators: name: Sinwani, Omer
name: Reiner, James W.
name: Klein, Lior
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Patterned nanostructures on the order of 200 nm $\times$ 200 nm of the itinerant ferromagnet ${\rm SrRuO_3}$ give rise to superparamagnetic behavior below the Curie temperature (${\rm \sim 150 \ K}$) down to a sample-dependent blocking temperature. We monitor the superparamagnetic fluctuations of an individual volume and demonstrate that the field dependence of the time-averaged magnetization is well described by the Langevin equation. On the other hand, the rate of the fluctuations suggests that the volume in which the magnetization fluctuates is smaller by more than an order of magnitude. We suggest that switching via nucleation followed by propagation gives rise to Langevin behavior of the total volume, whereas the switching rate is determined by a much smaller nucleation volume.
Evolution and dynamics of cusped light-like Wilson loops (Hadron 2013)
Creators: name: Van der Veken, Frederik F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We address a connection between the energy evolution of the polygonal light-like Wilson exponentials and the geometry of the loop space with the gauge invariant Wilson loops of a variety of shapes being the fundamental degrees of freedom. The renormalization properties and the differential area evolution of these Wilson polygons are studied by making use of the universal Schwinger quantum dynamical approach. We discuss the appropriateness of the dynamical differential equations in the loop space to the study of the energy evolution of the collinear and transverse-momentum dependent parton distribution functions.
description: Proceedings for XV International Conference on Hadron Spectroscopy-Hadron 2013
Optimal Value of Information in Graphical Models
Creators: name: Krause, Andreas
name: Guestrin, Carlos
Publisher: name: arXiv
Year: 2014
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Many real-world decision making tasks require us to choose among several expensive observations. In a sensor network, for example, it is important to select the subset of sensors that is expected to provide the strongest reduction in uncertainty. In medical decision making tasks, one needs to select which tests to administer before deciding on the most effective treatment. It has been general practice to use heuristic-guided procedures for selecting observations. In this paper, we present the first efficient optimal algorithms for selecting observations for a class of probabilistic graphical models. For example, our algorithms allow to optimally label hidden variables in Hidden Markov Models (HMMs). We provide results for both selecting the optimal subset of observations, and for obtaining an optimal conditional observation plan. Furthermore we prove a surprising result: In most graphical models tasks, if one designs an efficient algorithm for chain graphs, such as HMMs, this procedure can be generalized to polytree graphical models. We prove that the optimizing value of information is $NP^{PP}$-hard even for polytrees. It also follows from our results that just computing decision theoretic value of information objective functions, which are commonly used in practice, is a #P-complete problem even on Naive Bayes models (a simple special case of polytrees). In addition, we consider several extensions, such as using our algorithms for scheduling observation selection for multiple sensors. We demonstrate the effectiveness of our approach on several real-world datasets, including a prototype sensor network deployment for energy conservation in buildings.
Optical and infrared polarimetry of the transient LMXB Cen X-4 in quiescence
Creators: name: Baglio, M. C.
name: D'Avanzo, P.
name: Campana, S.
name: Covino, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the first optical and infrared polarimetric study of the low mass transient X-ray binary Cen X-4 during its quiescent phase. This work is aimed to search for an intrinsic linear polarisation component in the system emitted radiation that might be due, e.g., to synchrotron emission from a compact jet, or to Thomson scattering with free electrons in an accretion disc. Multiband (BVRI) optical polarimetric observations were obtained during two nights in 2008 at the ESO La Silla 3.6 m telescope (EFOSC2) in polarimetric mode. These observations cover about the 30% of the 15.1 hours orbital period. J-band observations were obtained in 2007 with the NICS (TNG) instrument at La Palma, for a totality of 1 hour observation. We obtained 3-sigma upper limits to the polarisation degree in all the optical bands, with the most constraining one being in the I-band (P<0.5%). No phase-correlated variability has been noticed in all the filters. The J-band observations provided a 6% upper limit on the polarisation level. The constraining upper limits to the polarisation in the optical allowed us to evaluate the contribution of the possible emission of a relativistic particles jet to the total system radiation to be less then the 10%. This is in agreement with the observation of a spectral energy distribution typical of a single black body of a K-spectral type main sequence star irradiated from the compact object. Due to the low S/N ratio it was not possible to investigate the possible dependency of the polarisation degree from the wavelength, that could be suggestive of polarisation induced by Thomson scattering of radiation with free electrons in the outer part of the accretion disc. Observations with higher S/N ratio are required to examine in depth this hypothesis, searching for significant phase-correlated variability.
description: 7 pages, 9 figures, accepted for publication in section 7. Stellar structure and evolution of Astronomy and Astrophysics
Hysteresis in the Conductance of Asymmetrically Biased GaAs Quantum Point Contacts with in-plane Side Gates
Creators: name: Bhandari, N.
name: Dutta, M.
name: Charles, J.
name: Cahay, M.
name: Newrock, R. S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have observed hysteresis between the forward and reverse sweeps of a common mode bias applied to the two in-plane side gates of an asymmetrically biased GaAs quantum point contact. The size of the hysteresis loop increases with the amount of bias asymmetry between the two side gates and depends on the polarity of the bias asymmetry. It is argued that hysteresis may constitute another indirect proof of spontaneous spin polarization in the narrow portion of the quantum point contact.
description: 16 pages, 4 figures. arXiv admin note: text overlap with arXiv:1303.3429
A Discretization Method to Solve Fractional Variational Problems with Dependence on Hadamard Derivatives
Creators: name: Almeida, Ricardo
name: Bastos, Nuno R. O.
name: Torres, Delfim F. M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 26A33, 49M25

description: We provide a fast and simple method to solve fractional variational problems with dependence on Hadamard fractional derivatives. Using a relation between the Hadamard fractional operator and a sum involving integer-order derivatives, we rewrite the fractional problem into a classical optimal control problem. The latter problem is then solved by application of standard numerical techniques. We illustrate the procedure with an example.
description: This is a preprint of a paper whose final and definite form will appear in International Journal of Difference Equations, ISSN 0973-6069 (See http://campus.mst.edu/ijde). Submitted Nov 23, 2013; Revised Jan 27, 2014; Accepted Feb 15, 2014
แนวทางการออกแบบตลาดชุมชนเพื่อเพิ่มการใช้ประโยชน์พื้นที่สวนสุขภาพ ตำบลบุ่งหวาย อำเภอวารินชำราบ จังหวัดอุบลราชธานี
Creators: name: สิทธิชัย ใจขาน
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2022
Subjects: ตลาดชุมชน
การพัฒนาพื้นที่
การใช้ประโยชน์ที่ดิน
การออกแบบอย่างมีส่วนร่วม

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 21, 3, 129-143
ศึกษาการออกแบบลวดลายผ้าที่หลากหลายด้วยการพิมพ์สนิมเหล็ก
Creators: name: วณิชยา งามวิริยะวงศ์
Publisher: name: คณะสถาปัตยกรรมศาสตร์
Year: 2022
Subjects: สนิมเหล็ก
สร้างลายผ้า
วัสดุให้สี

description: วารสาร สิ่งแวดล้อมสรรค์สร้างวินิจฉัย (Built Environment Inquiry BEI), 21, 3, 145-160
Statistical properties of dark matter mini-haloes at z >= 15
Creators: name: Sasaki, Mei
name: Clark, Paul C.
name: Springel, Volker
name: Klessen, Ralf S.
name: Glover, Simon C. O.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Understanding the formation of the first objects in the universe critically depends on knowing whether the properties of small dark matter structures at high-redshift (z > 15) are different from their more massive lower-redshift counterparts. To clarify this point, we performed a high-resolution N-body simulation of a cosmological volume 1 Mpc/h comoving on a side, reaching the highest mass resolution to date in this regime. We make precision measurements of various physical properties that characterize dark matter haloes (such as the virial ratio, spin parameter, shape, and formation times, etc.) for the high-redshift (z > 15) dark matter mini-haloes we find in our simulation, and compare them to literature results and a moderate-resolution comparison run within a cube of side-length 100 Mpc/h. We find that dark matter haloes at high-redshift have a log-normal distribution of the dimensionless spin parameter centered around λ $\sim$ 0.03, similar to their more massive counterparts. They tend to have a small ratio of the length of the shortest axis to the longest axis (sphericity), and are highly prolate. In fact, haloes of given mass that formed recently are the least spherical, have the highest virial ratios, and have the highest spins. Interestingly, the formation times of our mini-halos depend only very weakly on mass, in contrast to more massive objects. This is expected from the slope of the linear power spectrum of density perturbations at this scale, but despite this difference, dark matter structures at high-redshift share many properties with their much more massive counterparts observed at later times.
description: 17 pages. Accepted for publication in MNRAS
Prime Implicates and Prime Implicants: From Propositional to Modal Logic
Creators: name: Bienvenu, Meghyn
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Prime implicates and prime implicants have proven relevant to a number of areas of artificial intelligence, most notably abductive reasoning and knowledge compilation. The purpose of this paper is to examine how these notions might be appropriately extended from propositional logic to the modal logic K. We begin the paper by considering a number of potential definitions of clauses and terms for K. The different definitions are evaluated with respect to a set of syntactic, semantic, and complexity-theoretic properties characteristic of the propositional definition. We then compare the definitions with respect to the properties of the notions of prime implicates and prime implicants that they induce. While there is no definition that perfectly generalizes the propositional notions, we show that there does exist one definition which satisfies many of the desirable properties of the propositional case. In the second half of the paper, we consider the computational properties of the selected definition. To this end, we provide sound and complete algorithms for generating and recognizing prime implicates, and we show the prime implicate recognition task to be PSPACE-complete. We also prove upper and lower bounds on the size and number of prime implicates. While the paper focuses on the logic K, all of our results hold equally well for multi-modal K and for concept expressions in the description logic ALC.
MARKET MIX FACTORS AFFECTING THAI TOURISTS' DECISION TO USE SMALL AND MEDIUM-SIZED HOTELS UNDER THE CRITICAL CONDITIONS OF THE COVID-19 PANDEMIC IN CHIANG MAI, THAILAND
Creators: name: QUN, Liao
Publisher: name: Asian Administration and Management Review
Year: 2022
Subjects: Tourist Behavior
Marketing Mix Factors
Small and Medium-Sized Hotels
COVID-19

description: Asian Administration and Management Review, 5, 2, 77-85
Determining the 7Li(n,gamma) cross section via Coulomb dissociation of 8Li
Creators: name: Izsak, R.
name: Horvath, A.
name: Kiss, A.
name: Seres, Z.
name: Galonsky, A.
name: Bertulani, C. A.
name: Fulop, Zs.
name: Baumann, T.
name: Bazin, D.
name: Ieki, K.
name: Bordeanu, C.
name: Carlin, N.
name: Csanad, M.
name: Deak, F.
name: DeYoung, P.
name: Frank, N.
name: Fukuchi, T.
name: Gade, A.
name: Galaviz, D.
name: Hoffman, C. R.
name: Peters, W. A.
name: Schelin, H.
name: Thoennessen, M.
name: Veres, G. I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The applicability of Coulomb dissociation reactions to determine the cross section for the inverse neutron capture reaction was explored using the reaction 8Li(gamma,n)7Li. A 69.5 MeV/nucleon 8Li beam was incident on a Pb target, and the outgoing neutron and 7Li nucleus were measured in coincidence. The deduced (n,gamma) excitation function is consistent with data for the direct capture reaction 7Li(n,gamma)8Li and with low-energy effective field theory calculations.
description: Accepted for publication in Phys. Rev. C
Constraining globular cluster formation through studies of young massive clusters - II. A Single Stellar Population Young Massive Cluster in NGC 34
Creators: name: Cabrera-Ziri, I.
name: Bastian, N.
name: Davies, B.
name: Magris, G.
name: Bruzual, G.
name: Schweizer, F.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Currently there are two competing scenarios to explain the origin of the stellar population in globular clusters (GCs). The main difference between them is whether or not multiple events of star formation took place within GCs. In this paper we present the star formation history (SFH) of Cluster 1, a massive young cluster in NGC 34 $(\sim10^7\mbox{ M}_\odot)$. We use DynBaS, a spectrum fitting algorithm, to retrieve the SFH and find that Cluster 1 is consistent with a single stellar population of solar metallicity with an age of $100\pm30$ Myr and a mass of $1.9\pm0.4\times10^7\mbox{ M}_\odot$. These results are in conflict with the expectations/predictions of the scenarios that invoke extended or multiple episodes within 30--100 Myr of the initial star-formation burst in young massive clusters.
description: 6 pages, 3 figures, accepted for publication in MNRAS
The Complexity of Circumscription in DLs
Creators: name: Bonatti, Piero A.
name: Lutz, Carsten
name: Wolter, Frank
Publisher: name: arXiv
Year: 2014
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: As fragments of first-order logic, Description logics (DLs) do not provide nonmonotonic features such as defeasible inheritance and default rules. Since many applications would benefit from the availability of such features, several families of nonmonotonic DLs have been developed that are mostly based on default logic and autoepistemic logic. In this paper, we consider circumscription as an interesting alternative approach to nonmonotonic DLs that, in particular, supports defeasible inheritance in a natural way. We study DLs extended with circumscription under different language restrictions and under different constraints on the sets of minimized, fixed, and varying predicates, and pinpoint the exact computational complexity of reasoning for DLs ranging from ALC to ALCIO and ALCQO. When the minimized and fixed predicates include only concept names but no role names, then reasoning is complete for NExpTime^NP. It becomes complete for NP^NExpTime when the number of minimized and fixed predicates is bounded by a constant. If roles can be minimized or fixed, then complexity ranges from NExpTime^NP to undecidability.
Metaplectic Theta Functions and Global Integrals
Creators: name: Friedberg, Solomon
name: Ginzburg, David
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F70

description: We convolve a theta function on an $n$-fold cover of $GL_3$ with an automorphic form on an $n'$-fold cover of $GL_2$ for suitable $n,n'$. To do so, we induce the theta function to the $n$-fold cover of $GL_4$ and use a Shalika integral. We show that in particular when $n=n'=3$ this construction gives a new Eulerian integral for an automorphic form on the 3-fold cover of $GL_2$ (the first such integral was given by Bump and Hoffstein), and when $n=4$, $n'=2$, it gives a Dirichlet series with analytic continuation and functional equation that involves both the Fourier coefficients of an automorphic form of half-integral weight and quartic Gauss sums. The analysis of these cases is based on the uniqueness of the Whittaker model for the local exceptional representation. The constructions studied here may be put in the context of a larger family of global integrals which are constructed using automorphic representations on covering groups. We sketch this wider context and some related conjectures.
description: 17 pages
Voices, instruments and somewhere in between: using musical medium to cross the knowledge organization/music boundary
Creators: name: Lee, Deborah
Publisher: name: ISKO UK
Year: 2013
Subjects: Music
Classification schemes

description: This paper considers the boundary between the library and information science (LIS) specialist and the music specialist's approach to music classification, and shows how crossing this boundary enhances knowledge on both sides.  Musical medium – in other words, the forces needed to rehearse or perform a musical work – is at the heart of music classification. Therefore, three examples of music medium phenomena will be considered from a combined LIS/music perspective. 
First, the "great" vocal/instrumental divide will be considered.  The paper will explore how this fundamental musicological categorization is reflected in LIS classification schemes, and what happens when the categorization of a vocal/instrumental hybrid such as the choral symphony is attempted.  The paper then considers the classification of musical instruments, comparing taxonomies within organology – the study of musical instruments – to LIS classification schemes for music.  Part of this analysis will consider the categorization of instruments into "families", and how this differs between the music and LIS disciplines.  This will be followed by an examination of the cross-fertilization between organology classification schemes and their bibliographic cousins, including an account of how the major organological taxonomy "Hornbostel and Sachs" crossed through the music boundary and into LIS territory. 
Through exploring these three specific examples of issues in classifying music medium, the general relationship between the LIS and music disciplines can be examined.   The paper will reveal that this relationship takes on many different guises, and that crossing the LIS/music boundary – in both directions – is critical to understanding the fundamental elements of music classification.
Majorana zero modes on a necklace
Creators: name: Li, Jian
name: Neupert, Titus
name: Bernevig, B. Andrei
name: Yazdani, Ali
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Non-Abelian quasiparticles have been predicted to exist in a variety of condensed matter systems. Their defining property is that an adiabatic braid between two of them results in a nontrivial change of the quantum state of the system. To date, no experimental platform has reached the desired control over non-Abelian quasiparticles to demonstrate this remarkable property. The simplest non-Abelian quasiparticles -- the Majorana bound states (MBS) -- can occur in one-dimensional (1D) electronic nano-structures proximity-coupled to a bulk superconductor -- a platform that is being currently explored in great depth both theoretically and experimentally. When tuned appropriately, such nano-wires can localize MBS at their ends, a pair of which forms a two-level system that is robust to local perturbations. This constitutes a topologically protected qubit that can serve as the building block for a topological quantum computer. To implement braiding operations among the MBS, schemes that allow to move MBS across wire networks have been explored theoretically. Here, we propose a simpler alternative setup, based on chains of magnetic adatoms on the surface of a thin-film superconductor, in which the control over an externally applied magnetic field suffices to create and manipulate MBS. We consider specific 1D patterns of adatoms, which can be engineered with scanning-tunneling-microscope based lateral atomic manipulation techniques, and show that they allow for the creation, annihilation, adiabatic motion, and braiding of pairs of MBS by varying the magnitude and orientation of the external magnetic field.
description: 27 pages, 19 figures
Palomar/TripleSpec observations of {\it Spitzer}/MIPSGAL~24\mic\ circumstellar shells: unveiling the nature of their central sources
Creators: name: Flagey, Nicolas
name: Noriega-Crespo, Alberto
name: Petric, Andreea O.
name: Geballe, Tom R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present near-IR spectroscopic observations of the central sources in 17 circumstellar shells from a sample of more than 400 "bubbles" discovered in the Spitzer/MIPSGAL 24um survey of the Galactic plane and in the Cyg-X region. To identify these shells, we have obtained J, H, and K band spectra with a resolution ~2600 of the stars at their centers. We observed 14 MIPSGAL bubbles (MBs), WR149, and 2 objects in the Cyg-X region (WR138a and BD+43 3710), our sample being about 2.5 mag fainter in K band than previous studies of the central sources of MBs. We use spectroscopic diagnostics and spectral libraries to constrain the natures of our targets. We find five late type giants. The equivalent widths of their CO 2.29um features allow us to determine their spectral types and hence derive extinction along the line of sight, distance, and physical size of the shells. We also find twelve early type stars, in nine MBs and the 3 comparison objects. We find that the subtype inferred from the near-IR for WR138a (WN9h) and WR149 (WN5h) agrees with that derived from optical observations. A careful analysis of the literature and the environment of BD+43 3710 allows us to rule out the carbon star nature previously suggested. Our spectrum suggests that it is a B5I star. At the centers of the nine MBs, we find a candidate [WC5-6], a candidate O5-6V star, a B0 supergiant, a B/A type giant, and five LBV candidates. We report the detections of emission lines arising from two shells with typical extents (~10") in agreement with those in the mid-IR. We summarize the findings on the natures of the MBs since their discovery, with 30% of them now known. Most MBs with central sources detected in the near- to mid-IR have been identified and are red and blue (super)giants, or stars evolving toward these phases including a handful of newly discovered Wolf-Rayet stars and a significant number of LBV candidates.
description: 14 pages, accepted for publication in Astronomical Journal
Maximally incompatible quantum observables
Creators: name: Heinosaari, Teiko
name: Schultz, Jussi
name: Toigo, Alessandro
name: Ziman, Mario
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The existence of maximally incompatible quantum observables in the sense of a minimal joint measurability region is investigated. Employing the universal quantum cloning device it is argued that only infinite dimensional quantum systems can accommodate maximal incompatibility. It is then shown that two of the most common pairs of complementary observables (position and momentum; number and phase) are maximally incompatible.
Quickest detection in coupled systems
Creators: name: Zhang, Hongzhong
name: Hadjiliadis, Olympia
name: Schäfer, Tobias
name: Poor, H. Vincent
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optimization and Control (math.OC)
subject: Information Theory (cs.IT)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 62L10, 62L15, 62C20, 60G40

description: This work considers the problem of quickest detection of signals in a coupled system of $N$ sensors, which receive continuous sequential observations from the environment. It is assumed that the signals, which are modeled by general Itô processes, are coupled across sensors, but that their onset times may differ from sensor to sensor. Two main cases are considered; in the first one signal strengths are the same across sensors while in the second one they differ by a constant. The objective is the optimal detection of the first time at which any sensor in the system receives a signal. The problem is formulated as a stochastic optimization problem in which an extended minimal Kullback-Leibler divergence criterion is used as a measure of detection delay, with a constraint on the mean time to the first false alarm. The case in which the sensors employ cumulative sum (CUSUM) strategies is considered, and it is proved that the minimum of $N$ CUSUMs is asymptotically optimal as the mean time to the first false alarm increases without bound. In particular, in the case of equal signal strengths across sensors, it is seen that the difference in detection delay of the $N$-CUSUM stopping rule and the unknown optimal stopping scheme tends to a constant related to the number of sensors as the mean time to the first false alarm increases without bound. Alternatively, in the case of unequal signal strengths, it is seen that this difference tends to zero.
description: 29 pages. SIAM Journal on Control and Optimization, forthcoming
Solving Weighted Constraint Satisfaction Problems with Memetic/Exact Hybrid Algorithms
Creators: name: Gallardo, José Enrique
name: Cotta, Carlos
name: Fernández, Antonio José
Publisher: name: arXiv
Year: 2014
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: A weighted constraint satisfaction problem (WCSP) is a constraint satisfaction problem in which preferences among solutions can be expressed. Bucket elimination is a complete technique commonly used to solve this kind of constraint satisfaction problem. When the memory required to apply bucket elimination is too high, a heuristic method based on it (denominated mini-buckets) can be used to calculate bounds for the optimal solution. Nevertheless, the curse of dimensionality makes these techniques impractical on large scale problems. In response to this situation, we present a memetic algorithm for WCSPs in which bucket elimination is used as a mechanism for recombining solutions, providing the best possible child from the parental set. Subsequently, a multi-level model in which this exact/metaheuristic hybrid is further hybridized with branch-and-bound techniques and mini-buckets is studied. As a case study, we have applied these algorithms to the resolution of the maximum density still life problem, a hard constraint optimization problem based on Conways game of life. The resulting algorithm consistently finds optimal patterns for up to date solved instances in less time than current approaches. Moreover, it is shown that this proposal provides new best known solutions for very large instances.
description: arXiv admin note: substantial text overlap with arXiv:0812.4170
R codes for the experiments in the paper "Panel Smooth Transition Regression Models"
Creators: name: Yang, Yukai
Publisher: name: Zenodo
Year: 2017
Subjects: heterogeneous panel
misspecification test
nonlinear modelling of panel data
smooth transition model
size
power
wild cluster bootstrap
simulation

description: provides R codes for all the experiments (size and power, LM tests, wild bootstrap and wild cluster bootstrap tests) in the paper "Panel Smooth Transition Regression Models".

I wrote the codes when I was working as a post-doc at CORE, Université catholique de Louvain, Belgium, in 2014.

Computational resources for running the codes for the experiments have been provided by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11, and recently by SNIC through Uppsala Multidisciplinary Center for Advanced Computational Science (UPPMAX) under Project SNIC 2015/6-117.

In the following, you can find the descriptions for all folders. In each folder, you can find the codes. For more details about the codes, open and read the comments part in the header part.
Bright solitons in Bose-Einstein condensates with field-induced dipole moments
Creators: name: Abdullaev, F. Kh.
name: Gammal, A.
name: Malomed, B. A.
name: Tomio, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We introduce an effectively one-dimensional (1D) model of a bosonic gas of particles carrying collinear dipole moments which are induced by an external polarizing field with the strength periodically modulated along the coordinate, which gives rise to an effective nonlocal nonlinear lattice in the condensate. The existence, shape and stability of bright solitons, appearing in this model, are investigated by means of the variational approximation and numerical methods. The mobility of solitons and interactions between them are studied too.
description: Journal of Physics B, in press. 20 pages, 9 figures (21 frames)
A unified proof of inequalities and some new inequalities involving Neuman-Sándor mean
Creators: name: Li, Wen-Hui
name: Qi, Feng
Publisher: name: arXiv
Year: 2013
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: Primary 26E60, Secondary 26D07, 41A30

description: In the paper, by finding linear relations of differences between some means, the authors supply a unified proof of some double inequalities for bounding Neuman-Sándor means in terms of the arithmetic, harmonic, and contra-harmonic means and discover some new sharp inequalities involving Neuman-Sándor, contra-harmonic, root-square, and other means of two positive real numbers.
description: 8 pages
InGaN/GaN Tunnel Junctions For Hole Injection in GaN Light Emitting Diodes
Creators: name: Krishnamoorthy, Sriram
name: Akyol, Fatih
name: Rajan, Siddharth
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: InGaN/GaN tunnel junction contacts were grown on top of an InGaN/GaN blue (450 nm) light emitting diode wafer using plasma assisted molecular beam epitaxy. The tunnel junction contacts enable low spreading resistance n-GaN top contact layer thereby requiring less top metal contact coverage on the surface. A voltage drop of 5.3 V at 100 mA, forward resistance of 2 x 10-2 ohm cm2 and a higher light output power are measured in tunnel junction LED. A low resistance of 5 x 10-4 ohm cm2 was measured in a MBE grown tunnel junction on GaN PN junction device, indicating that the tunnel junction LED device resistance is limited by the regrowth interface and not by the intrinsic tunneling resistance.
Systematic search for high-energy gamma-ray emission from bow shocks of runaway stars
Creators: name: Schulz, A.
name: Ackermann, M.
name: Buehler, R.
name: Mayer, M.
name: Klepser, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context. It has been suggested that the bow shocks of runaway stars are sources of high-energy gamma rays (E > 100 MeV). Theoretical models predicting high-energy gamma-ray emission from these sources were followed by the first detection of non-thermal radio emission from the bow shock of BD+43$^°$ 3654 and non-thermal X-ray emission from the bow shock of AE Aurigae. Aims. We perform the first systematic search for MeV and GeV emission from 27 bow shocks of runaway stars using data collected by the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope (Fermi). Methods. We analysed 57 months of Fermi-LAT data at the positions of 27 bow shocks of runaway stars extracted from the Extensive stellar BOw Shock Survey catalogue (E-BOSS). A likelihood analysis was performed to search for gamma-ray emission that is not compatible with diffuse background or emission from neighbouring sources and that could be associated with the bow shocks. Results. None of the bow shock candidates is detected significantly in the Fermi-LAT energy range. We therefore present upper limits on the high-energy emission in the energy range from 100 MeV to 300 GeV for 27 bow shocks of runaway stars in four energy bands. For the three cases where models of the high-energy emission are published we compare our upper limits to the modelled spectra. Our limits exclude the model predictions for Zeta Ophiuchi by a factor $\approx$ 5.
description: 5 pages, 5 figures, 1 table, accepted by A&A