cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The effect of laser assisted tape placement processing conditions on microstructural evolution, residual stress and interlaminar shear strength of carbon fibre/PEEK laminates
Creators: name: Ma, Hong
name: Bandaru, Aswani
name: Weaver, Paul
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 40
subject: Engineering

description: In the present study, both experiments and thermo-mechanical coupled simulations were conducted to characterise the diverse crystallisation behaviours and the processing parameter-microstructure-mechanical property relationships occurring in laser-assisted tape placement (LATP) manufacturing of carbon fibre (CF)/Polyetheretherketone (PEEK) laminates. Specifically, at various processing temperatures (350 ◦C or 400 o C), increasing the compaction pressure from 2 to 4 bar causes distinct defect distribution behaviours. However, variations in processing parameters show minimal effect on the morphology and size of crystallised spherulites, which were consistently around 2–3 μm in size, resulting in a final crystallinity of manufactured laminates within 30%–35%. It was found that the cold crystallisation processes occurring in PEEK during LATP play an important role in determining the final degree of crystallinity. Experimental measurements and simulations indicate that changes in processing parameters have a negligible effect on residual stress levels, especially regarding interlaminar residual stresses. A processing temperature of 400 ◦C was found to generate a diffuse, yet coherent, interphase spanning the fibre/matrix interface with a thickness approximately 70 nm. In contrast, at a processing temperature of 350 ◦C, a distinct, incoherent interface was confirmed between fibre and matrix. The formation of the interphase, coupled with fewer defects, leading to a relatively high interlaminar shear strength (78 MPa) of manufactured laminates under appropriate processing conditions. Therefore, it is suggested that regulating the degree of cold crystallisation in polymer matrices while ensuring a strong fibre/matrix interfacial bond by the optimisation of processing temperature, will enable the tailoring of microstructure and design of composites to meet specific strength property requirements.
A Manipulator Control System for Creating Radiation Maps Using Mercuric Iodide (HgI2) Detectors
Creators: name: Kume, Masao
name: Khosla, Pradeep
Publisher: name: Carnegie Mellon University
Year: 1993
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: In this paper we describe the development of a robotic system that uses Mercuric Iodide (HgI2) sensors to create a map of radiation intensity in the environment. The sensors are mounted at the end-effector of a PUMA 560 manipulator. Data from these sensors is used to compute the radiation intensity. A control system is developed that moves the end-effector along constant intensity contours. The experiments use light sources (instead of radiation sources) and demonstrate the efficacy of such a system to create radiation maps.
On descent theory and main conjectures in non-commutative Iwasawa theory
Creators: name: Burns, D.
name: Venjakob, O.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G40

description: We prove a `Weierstrass Preparation Theorem' and develop an explicit descent formalism in the context of Whitehead groups of non-commutative Iwasawa algebras. We use these results to describe the precise connection between the main conjecture of non-commutative Iwasawa theory (in the sense of Coates, Fukaya, Kato, Sujatha and Venjakob) and the equivariant Tamagawa number conjecture. The latter result is both a converse to a theorem of Fukaya and Kato and also provides an important means of deriving explicit consequences of the main conjecture.
description: 43 pages
Electron Heating in Low Mach Number Perpendicular shocks. II. Dependence on the Pre-Shock Conditions
Creators: name: Guo, Xinyi
name: Sironi, Lorenzo
name: Narayan, Ramesh
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Recent X-ray observations of merger shocks in galaxy clusters have shown that the post-shock plasma is two-temperature, with the protons being hotter than the electrons. In this work, the second of a series, we investigate by means of two-dimensional particle-in-cell simulations the efficiency of electron irreversible heating in perpendicular low Mach number shocks. We consider values of plasma beta (ratio of thermal and magnetic pressures) in the range $4\lesssim β_{p0}\lesssim 32$ and sonic Mach number (ratio of shock speed to pre-shock sound speed) in the range $2\lesssim M_{s}\lesssim 5$, as appropriate for galaxy cluster shocks. As shown in Paper I, magnetic field amplification - induced by shock compression of the pre-shock field, or by strong proton cyclotron and mirror modes accompanying the relaxation of proton temperature anisotropy - can drive the electron temperature anisotropy beyond the threshold of the electron whistler instability. The growth of whistler waves breaks the electron adiabatic invariance, and allows for efficient entropy production. We find that the post-shock electron temperature $T_{e2}$ exceeds the adiabatic expectation $T_{e2,\rm ad}$ by an amount $(T_{e2}-T_{e2,\rm ad})/T_{e0}\simeq 0.044 \,M_s (M_s-1)$ (here, $T_{e0}$ is the pre-shock temperature), which depends only weakly on the plasma beta, over the range $4\lesssim β_{p0}\lesssim 32$ which we have explored, and on the proton-to-electron mass ratio (the coefficient of $\simeq 0.044$ is measured for our fiducial $m_i/m_e=49$, and we estimate that it will decrease to $\simeq 0.03$ for the realistic mass ratio). Our results have important implications for current and future observations of galaxy cluster shocks in the radio band (synchrotron emission and Sunyaev-Zel'dovich effect) and at X-ray frequencies.
description: 22 pages, 16 figures, 4 tables, 3 appendices; submitted to ApJ
A Language–based Approach to Specification and Enforcement of Architectural Protocols (CMU-ISR-10-110)
Creators: name: Bierhoff, Kevin
name: Darpan  Saini
name: Kehrt, Matthew
name: Al-Meshari, Majid
name: Sangjin  Han
name: Aldrich, Jonathan
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Software architecture research has proposed using protocols for specifying the interactions between components through ports. Enforcing these protocols in an implementation is difficult. This paper proposes an approach to statically reason about protocol conformance of an implementation. It leverages the architectural guarantees of the ArchJava programming language. The approach allows modular reasoning about implementations with callbacks, recursive calls, and multiple instances of component types. It uses a dataflow analysis to check method implementations and a summary-based interprocedural analysis to reason modularly about component composition. The approach is limited to static architectures but can handle multiple instances for component types and arbitrary nesting of components. We tested the implementation on a case study, and the results suggest that the approach can be scaled to large software applications.
Constraints on Torsion from Lorentz Violation
Creators: name: Kostelecky, Alan
name: Russell, Neil
name: Tasson, Jay
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Exceptional sensitivity to spacetime torsion can be achieved by searching for its couplings to fermions. Recent experimental searches for Lorentz violation are exploited to extract new constraints involving 19 of the 24 independent torsion components down to levels of order 10^{-31} GeV.
description: 4 pages two-column REVTeX, accepted in Physical Review Letters
title: From camps to urban enclaves: Accommodating Syrian refugees in Berlin (2016-2019)
Creators: name: Nössing, Elisabeth
Publisher: name: Universität Bern
Year: 2024
Subjects: subject: 360 Social problems & social services

description: This study looks at the proliferation and perpetuation of refugee camps in Berlin taking ethnographical fieldwork with Syrian refugees as a starting point. It raises two core questions: first, what kept refugee shelters in place after the so-called refugee crisis was over; and second, what evolution did refugee shelters see as the years went by? While asylum seekers in Germany are to reside in refugee shelters in an initial phase, refugee shelters in Berlin increasingly came to host residents who were no longer legally bound to stay in a shelter but did not find a private home on the tight housing market. Drawing on Michel Agier’s theorisation of the refugee camp and Loïc Wacquant’s work on socio-spatial relegation, this study highlights the nexus of refugee housing and urban housing offering a spatial take on the buzzword integration. It presents an ethnography of urban refugee housing within the context of the so-called European refugee crisis and the proliferation of refugee camps in Europe more generally. This study is based on multi-sited field research in several emergency shelters, a container camp, and a modular accommodation facility in Berlin over the course of four years (2016-2019). In addition, it incorporates extensive research outside of the refugee camps guided by an actor-network theory approach including participant observation and interviews with Syrian refugees navigating the housing market, state and district officials, housing counsellors, politicians, and representatives of the housing industry. Also, it offers an overview on refugee housing and social housing policies in Berlin as well as a thorough analysis of its legal-administrational framework. Ethnographical evidence includes case studies on precarious or informal means of housing and illegal brokers as well as insights into life in the shelters and what it meant for refugees to continue living in a shelter rather than in a home. Main findings suggest that while refugees were integrated into the social system, the health system, the job market, and the educational system, they felt kept apart in the shelters. This study found that refugee shelters turned into fenced-off forms of urban housing over the years while refugees emerged as a new group of urban poor in risk of homelessness. Put in more theoretical terms, refugee shelters saw processes of urbanisation and came to present important parallels with spaces of relegation, however, retaining core features of the camp as a place at the margins and thus fundamentally remaining spaces at the margins of the urban and at the margins of society.
Distributed Non-Convex First-Order Optimization and Information Processing: Lower Complexity Bounds and Rate Optimal Algorithms
Creators: name: Sun, Haoran
name: Hong, Mingyi
Publisher: name: arXiv
Year: 2018
Subjects: subject: Optimization and Control (math.OC)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Information Theory (cs.IT)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We consider a class of popular distributed non-convex optimization problems, in which agents connected by a network $\mathcal{G}$ collectively optimize a sum of smooth (possibly non-convex) local objective functions. We address the following question: if the agents can only access the gradients of local functions, what are the fastest rates that any distributed algorithms can achieve, and how to achieve those rates. First, we show that there exist difficult problem instances, such that it takes a class of distributed first-order methods at least $\mathcal{O}(1/\sqrt{ξ(\mathcal{G})} \times \bar{L} /ε)$ communication rounds to achieve certain $ε$-solution [where $ξ(\mathcal{G})$ denotes the spectral gap of the graph Laplacian matrix, and $\bar{L}$ is some Lipschitz constant]. Second, we propose (near) optimal methods whose rates match the developed lower rate bound (up to a polylog factor). The key in the algorithm design is to properly embed the classical polynomial filtering techniques into modern first-order algorithms. To the best of our knowledge, this is the first time that lower rate bounds and optimal methods have been developed for distributed non-convex optimization problems.
description: Accepted by TSP
A Human-Machine Interface to Support Reconfigurable Software Assembly for Virtual Laboratories
Creators: name: Gertz, Matthew W.
name: Stewart, David B.
name: Khosla, Pradeep
Publisher: name: Carnegie Mellon University
Year: 1994
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Recent developments in reusable and reconfigurable real-time software make it possible to create virtual laboratories wherein applications for a sensor-based control system located at a particular location can be created by assembling software modules designed at other sites, and executed in combination upon a robotic system at yet another site. Ultimately, such systems will lead to the development of virtual factories, wherein assembly can be performed remotely, using network-accessible time-shared facilities, from sites which otherwise would lack the necessary resources to accomplish such tasks. The benefits of these virtual laboratories and factories can be greatly enhanced by using hypermedia mechanisms. We have developed Onika, an iconically programmed human-machine interface with hypermedia capabilities, which interacts with reconfigurable software to assemble reusable code into applications. Onika can retrieve and use software modules created at other sites via hyperlinks, integrating them with modules created locally. Onika has been fully integrated with the Chimera real-time operating system in order to control several different robotic systems at Carnegie Mellon University, both locally and remotely.
Different canonical formulations of Einstein's theory of gravity
Creators: name: Franke, V. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe the four most famous versions of the classical canonical formalism in the Einstein theory of gravity: the Arnovitt-Deser-Misner formalism, the Faddeev-Popov formalism, the tetrad formalism in the usual form, and the tetrad formalism in the form best suited for constructing the loop theory of gravity, which is now being developed. We present the canonical transformations relating these formalisms. The paper is written mainly for pedagogical purposes.
description: LaTeX, 18 pages, some misprints in formulas (131)-(134) are corrected
title: ADCO, Cartulaire de Saint-Étienne de Dijon (XIVe siècle), Cart. 24 (G 137), 31 folios, f. 0034
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2011
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire de Saint-Étienne de Dijon (XIVe siècle), Archives départementales de la Côte-d'Or, Cart. 24 (G 137), 31 folios, f. 0034, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Saint-Étienne de Dijon (XIVe siècle), Archives départementales de la Côte-d'Or, Cart. 24 (G 137), 31 folios, f. 0034, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye Saint-Étienne de Dijon
description: Provenance: http://www.wikidata.org/entity/Q15945019
title: MOLECULAR ABUNDANCE VARIATIONS AMONG AND WITHIN COLD, DARK MOLECULAR CLOUDS
Creators: name: OHISHI, M
name: Irvine, William M.
name: KAIFU, N
Publisher: name: University of Massachusetts Amherst
Year: 1992
Subjects: subject: INTERSTELLAR MOLECULES
subject: MOLECULAR ABUNDANCE
subject: CHEMICAL EVOLUTION
subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1992IAUS..150..171O
Atomic Spectroscopy with Twisted Photons: Separation of M1--E2 Mixed Multipoles
Creators: name: Afanasev, Andrei
name: Carlson, Carl E.
name: Solyanik, Maria
Publisher: name: arXiv
Year: 2018
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We analyze atomic photoexcitation into the discrete states by twisted photons, or photons carrying extra orbital angular momentum along their direction of propagation. From the angular momentum and parity considerations, we are able to relate twisted-photon photoexcitation amplitudes to their plane-wave analogues, independently of the details of the atomic wave functions. We analyzed the photo-absorption cross sections of mixed-multipolarity $E2-M1$ transitions in ionized atoms and found fundamental differences coming from the photon topology. Our theoretical analysis demonstrates that it is possible to extract the relative transition rates of different multipolar contributions by measuring the photo-excitation rate as a function of the atom's position (or the impact parameter) with respect to the optical vortex center. The proposed technique for separation of multipoles can be implemented if the target's atom position is resolved with sub-wavelength accuracy, for example, with Paul traps. Numerical examples are presented for Boron-like highly-charged ions (HCI).
description: 7 pages, 3 figures
Real and imaginary-time $Q\bar{Q}$ correlators in a thermal medium
Creators: name: Beraudo, A.
name: Blaizot, J. -P.
name: Ratti, C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the behavior of a pair of heavy fermions, denoted by $Q$ and $\bar{Q}$, in a hot/dense medium. Although we have in mind the situation where $Q$ and $\bar{Q}$ denote heavy quarks, our treatment will be limited to simplified models, which bear only some general similarities with QCD. We study in particular the limiting case where the mass of the heavy fermions is infinite. Then a number of results can be derived exactly: a Schrödinger equation can be established for the correlator of the heavy quarks; the interaction effects exponentiate, leading to a simple instantaneous effective potential for this Schrödinger equation. We consider simple models for the medium in which the $Q\bar Q$ pair propagates. In the case where the medium is a plasma of photons and light charged fermions, an imaginary part develops in this effective potential. We discuss the physical interpretation of this imaginary part in terms of the collisions between the heavy particles and the light fermions of the medium; the same collisions also determine the damping rate of the heavy fermions. Finally we study the connection between the real-time propagator of the heavy fermion pair and its Euclidean counterpart, and show that the real part of the potential entering the Schrödinger equation for the real-time propagator is the free energy calculated in the imaginary-time formalism.
description: 32 pages, 8 figures
A Human-Machine Interface for Reconfigurable Sensor-Based Control Systems
Creators: name: Gertz, Matthew W.
name: Stewart, David B.
name: Khosla, Pradeep
Publisher: name: Carnegie Mellon University
Year: 1993
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: The development of software for dynamically reconfigurable sensor-based control systems is a complicated and tedious process, requiring specialization in real-time systems programming and an amount of time which may not be available, for instance, in a space laboratory. The total development time can be reduced by automatically integrating reusable software modules to create applications. The integration of these modules can be further simplified by the use of a high-level programming interface which can integrate modules developed at different sites. We have developed Onika, an iconically programmed human-machine interface, to interact with a reconfigurable software framework to create reusable code. Onika presents appropriate work environments for both application engineers and end-users. For engineers, icons representing real-time software modules can be combined to form real-time jobs. For the end-user, icons representing these jobs are assembled by the user into applications. Onika verifies that all jobs and applications are syntactically correct, non-ambiguous, and complete. They can then be executed from within Onika, or can be saved as a stand-alone program which can be executed independently on the underlying real-time operating system. Onika can retrieve and use software modules created at other sites with modules created locally. While Onika has been fully integrated with the Chimera real-time operating system in order to control several different robotic systems in the Advanced Manipulators Laboratory at Carnegie Mellon University, it can also function independently of Chimera. Onika will be used in connection with NASA Langley Research Center’s Intravehicular Autonomous Robot (IVAR) space manipulator laboratory.
Steeper stellar cusps in galactic centers from binary disruption
Creators: name: Fragione, Giacomo
name: Sari, Re'em
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The relaxed distribution of stars around a massive black hole is known to follow a cusp profile $ρ(r)\propto r^{-α}$ with characteristic slope $α=7/4$. This follows from energy conservation and a scattering rate as given by two body encounters. However, we show that injection of stars close to the black hole, i.e. a source term in the standard cusp picture, modifies this profile. In the steady-state configuration, the cusp develops a central region with typical slope $α=9/4$ in which stars diffuse outward. Binary disruption by the intense tidal field of the massive black hole is among the phenomena that take place in the Galactic Center. In such disruption, one of the binary members remains bound to the black hole, thus providing a source term of stars close to the black hole. Assuming a binary fraction of $0.1$ and an orbital circularization efficiency of $0.35$, we show that this source is strong enough to modify the cusp profile within $\approx 0.07$ pc in the Galactic Center. If the binary fraction at the influence radius is of order unity and the orbits of all the captured stars are efficiently circularized, the steeper cusp extends almost as far as the radius of influence of the black hole.
description: 8 pages, 3 figures, 1 Table, accepted by ApJ
Cosmogenic neutrinos and quasi-stable supersymmetric particle production
Creators: name: Reno, M. H.
name: Sarcevic, I.
name: Uscinski, J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the signal for the detection of quasi-stable supersymmetric particles produced in interactions of cosmogenic neutrinos. We consider energy loss of high energy staus due to photonuclear and weak interactions. We show that there are optimal nadir angles for which the stau signal is a factor of several hundred larager than muons. We discuss how one could potentially eliminate the muon background by considering the energy loss of muons in the detector. We also show results for the showers produced by weak interactions of staus that reach the detector.
description: 11 pages, 18 figures; minor changes in the conclusion, version to be published in Phys. Rev. D
Goresky-MacPherson calculus for the affine flag varieties
Creators: name: Yun, Zhiwei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Algebraic Geometry (math.AG)
subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics
subject: 14L30, 55N91

description: We use the fixed point arrangement technique developed by Goresky-MacPherson to calculate the part of the equivariant cohomology of the affine flag varieties generated by degree 2. This turns out to be a quadric cone. We also describe the spectrum of the full equivariant cohomology ring as an explicit geometric object. We use our results to show that the vertices of the moment map images of the affine flag varieties lie on a paraboloid.
Projective duals to algebraic and tropical hypersurfaces
Creators: name: Ilten, Nathan
name: Len, Yoav
Publisher: name: arXiv
Year: 2018
Subjects: subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 14T05, 14J70, 14M99, 14N20

description: We study a tropical analogue of the projective dual variety of a hypersurface. When $X$ is a curve in $\mathbb{P}^2$ or a surface in $\mathbb{P}^3$, we provide an explicit description of $\text{Trop}(X^*)$ in terms of $\text{Trop}(X)$, as long as $\text{Trop}(X)$ is smooth and satisfies a mild genericity condition. As a consequence, when $X$ is a curve we describe the transformation of Newton polygons under projective duality, and recover classical formulas for the degree of a dual plane curve. For higher dimensional hypersurfaces $X$, we give a partial description of $\text{Trop}(X^*)$.
description: 47 pages, 13 figures; v2 minor revisions; accepted to PLMS
SMA High Angular Resolution Imaging of the Lensed Quasar APM08279+5255
Creators: name: Krips, M.
name: Peck, A. B.
name: Sakamoto, K.
name: Petitpas, G. B.
name: Wilner, D. J.
name: Matsushita, S.
name: Iono, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present Submillimeter Array observations of the z=3.91 gravitationally lensed broad absorption line quasar APM08279+5255 which spatially resolve the 1.0mm (0.2mm rest-frame) dust continuum emission. At 0.4" resolution, the emission is separated into two components, a stronger, extended one to the northeast (46+/-5mJy) and a weaker, compact one to the southwest (15+/-2mJy). We have carried out simulations of the gravitational lensing effect responsible for the two submm components in order to constrain the intrinsic size of the submm continuum emission. Using an elliptical lens potential, the best fit lensing model yields an intrinsic (projected) diameter of ~80pc, which is not as compact as the optical/near-infrared (NIR) emission and agrees with previous size estimates of the gas and dust emission in APM08279+5255. Based on our estimate, we favor a scenario in which the 0.2mm (rest-frame) emission originates from a warm dust component (T_d=150-220K) that is mainly heated by the AGN rather than by a starburst (SB). The flux is boosted by a factor of ~90 in our model, consistent with recent estimates for APM08279+5255.
description: 6 pages, 2 figures, accepted for publication in ApJL, in emulateApJ format
Variational ansatz-based quantum simulation of imaginary time evolution
Creators: name: McArdle, Sam
name: Jones, Tyson
name: Endo, Suguru
name: Li, Ying
name: Benjamin, Simon
name: Yuan, Xiao
Publisher: name: arXiv
Year: 2018
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Imaginary time evolution is a powerful tool for studying quantum systems. While it is possible to simulate with a classical computer, the time and memory requirements generally scale exponentially with the system size. Conversely, quantum computers can efficiently simulate quantum systems, but not non-unitary imaginary time evolution. We propose a variational algorithm for simulating imaginary time evolution on a hybrid quantum computer. We use this algorithm to find the ground-state energy of many-particle systems; specifically molecular hydrogen and lithium hydride, finding the ground state with high probability. Our method can also be applied to general optimisation problems and quantum machine learning. As our algorithm is hybrid, suitable for error mitigation and can exploit shallow quantum circuits, it can be implemented with current quantum computers.
description: 14 pages
Island formation in disordered superconducting thin films at finite magnetic fields
Creators: name: Dubi, Y.
name: Meir, Y.
name: Avishai, Y.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The existence of "superconducting islands" (i.e., locally confined regions with superconducting correlations) in amorphous superconducting thin films can account for numerous experimental findings. Such spatial fluctuations in the superconducting gap were indeed observed experimentally, and were shown to persist into the insulating side of the superconductor-insulator transition. In this work a detailed account on the formation and evolution of superconducting islands in disordered two-dimensional superconductors is presented, using a locally self-consistent numerical solution of the Bogoliubov-de-Gennes equations. Specifically, the formation of SC islands is demonstrated, and their evolution with an applied perpendicular magnetic field is studied in details, along with the disorder-induced vortex-pinning. Simulating the presence of a parallel Zeeman field it is demonstrated that the islands are indeed uncorrelated superconducting domains. Experimental predictions based on this analysis are presented.
description: 7 pages, 7 figures. Some typos corrected, introduction and summary revised, some annotation changed
Fixing the fixed-point system - Applying Dynamic Renormalization Group to systems with long-range interactions
Creators: name: Katzav, E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this paper a mode of using the Dynamic Renormalization Group (DRG) method is suggested in order to cope with inconsistent results obtained when applying it to a continuous family of one-dimensional nonlocal models. The key observation is that the correct fixed-point dynamical system has to be identified during the analysis in order to account for all the relevant terms that are generated under renormalization. This is well established for static problems, however poorly implemented in dynamical ones. An application of this approach to a nonlocal extension of the Kardar-Parisi-Zhang equation resolves certain problems in one-dimension. Namely, obviously problematic predictions are eliminated and the existing exact analytic results are recovered.
description: 14 pages, 1 figure
title: ADCO, Grènetier de Cîteaux : comptes (1499-1503) (11 H 1173), f. 00568
Creators: name: de la Côte-d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CBMA/CG21/F.PETOT/2019
name: Petot, Frédéric
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: comptes

description: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173). Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Grènetier de Cîteaux : comptes (1499-1503), Archives départementales de la Côte-d'Or, (11 H 1173), f. 00568, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https://manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
A History of the Capability Maturity Model for Software
Creators: name: Paulk, Mark C.
Publisher: name: Carnegie Mellon University
Year: 2009
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: The Software Engineering Institute developed a five-level Capability Maturity Model for Software that described how software organizations transform their capability for building software by focusing on software process improvement. The model was initially published in 1987 as a software process maturity framework that briefly described five maturity levels. The model was formalized as the Software CMM® with a detailed description of recommended software engineering and management practices when published in 1991. Version 1.1 of the model was published in 1993, and work on Software CMM v2 was nearing completion when it was halted in 1997 in favor of the CMM Integration™ (CMMI) effort, which integrated systems engineering, software engineering, and integrated process and product development into a single model. The success of the Software CMM inspired a variety of maturity models and other standards. This article describes the history of the model and some of the major decisions made in its evolution.
A simplicial groupoid for plethysm
Creators: name: Cebrian, Alex
Publisher: name: arXiv
Year: 2018
Subjects: subject: Combinatorics (math.CO)
subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: FOS: Mathematics
subject: 05A18, 05A19, 18G30, 18B40, 16T10, 13F25

description: We give a simple combinatorial model for plethysm. Precisely, the bialgebra dual to plethystic substitution is realised as the homotopy cardinality of the incidence bialgebra of an explicit simplicial groupoid, obtained from surjections by a construction reminiscent of the Waldhausen S and the Quillen Q-construction.
description: 23 pages, expository improvements
Thermodynamics of Protein Folding from Coarse-Grained Models' Perspectives
Creators: name: Bachmann, Michael
name: Janke, Wolfhard
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Folding and aggregation of proteins, the interaction between proteins and membranes, as well as the adsorption of organic soft matter to inorganic solid substrates belong to the most interesting challenges in understanding structure and function of complex macromolecules. This is reasoned by the interdisciplinary character of the associated questions ranging from the molecular origin of the loss of biological functionality as, for example, in Alzheimer's disease to the development of organic circuits for biosensory applications. In this lecture, we focus on the analysis of mesoscopic models for protein folding, aggregation, and hybrid systems of soft and solid condensed matter. The simplicity of the coarse-grained models allows for a more universal description of the notoriously difficult problem of protein folding. In this approach, classifications of structure formation processes with respect to the conformational pseudophases are possible. This is similar in aggregation and adsorption processes, where the individual folding propensity is influenced by external forces. The main problem in studies of conformational transitions is that the sequences of amino acids proteins are built up of are necessarily of finite length and, therefore, a thermodynamic limit does not exist. Thus, structural transitions are not phase transitions in the strict thermodynamic sense and the analysis of pseudouniversal aspects is intricate, as apparently small-system effects accompany all conformational transitions and cannot be neglected.
description: 43 pages, 18 figures, to appear in Lect. Notes Phys. 736 (Springer, Berlin, 2008)
Decentralized collaboration for the AutoRA Python package with a functional paradigm and namespace packages
Creators: name: Holland, John Gerrard
Publisher: name: Zenodo
Year: 2024
Subjects: subject: Cognitive psychology
subject: Psychology
subject: FOS: Psychology
subject: Automation
subject: Research Software Engineering

description: AutoRA – the Automated Research Assistant – is a growing collection of python packages for running fully automated psychological experiments online. It allows the user to automate the specification of experimental conditions, data collection, and theory derivation, cycling back to specifying new experimental conditions.

One primary goal of the PI was to allow unaffiliated developers to contribute new methods for generating experimental conditions, and new regression techniques for theory derivation. But taking the naïve monorepo approach would be too costly: either 1) testing all of the contributions for every change to the code – which would be too costly as some of the contributions train neural networks as part of their execution and require hours to run; or 2) would require configuring the CI so that only relevant parts of the code were tested for each pull request – which would mean a high maintenance burden. Furthermore, since this work is about applying ML to experiments run on people, it’s vital that every submission be ethically vetted before it can be part of the official release.

Thus, one primary goal of our work was to allow for decentralized extensibility, so that contributors unaffiliated with the core team could easily innovate and share new functionality without leading to a high centralized maintenance and testing costs. Another was to ensure that contributions could be vetted and included easily.

We’ll present how RSEs helped to establish a common interface based around a simple functional paradigm, with namespace packages spread across multiple repositories so that each contributor could be owner of and responsible for their own work, and how their contributions are integrated into the main package. We’ll also look at how we enable contributors to start their work quickly using templates.
title: Collaborative Learning in Research, Information-sharing and Governance on How Urban forests as nature-based solutions support Sino-European urban futures.
title: MAIA Webinar
titleType: Subtitle
Creators: name: De Vreese, Rik
Publisher: name: European Forest Institute
Year: 2024
Subjects: urban forestry
nature-based solutions
project outcomes
urban trees
nature-based education

description: Rik De Vreese presented the CLEARING HOUSE project during the 1st MAIA webinar (https://www.youtube.com/watch?v=R_eQBNUEMOk)
Evorus: A Crowd-powered Conversational Assistant Built to Automate Itself Over Time
Creators: name: Huang, Ting-Hao 'Kenneth'
name: Chang, Joseph Chee
name: Bigham, Jeffrey P.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: H.5.m

description: Crowd-powered conversational assistants have been shown to be more robust than automated systems, but do so at the cost of higher response latency and monetary costs. A promising direction is to combine the two approaches for high quality, low latency, and low cost solutions. In this paper, we introduce Evorus, a crowd-powered conversational assistant built to automate itself over time by (i) allowing new chatbots to be easily integrated to automate more scenarios, (ii) reusing prior crowd answers, and (iii) learning to automatically approve response candidates. Our 5-month-long deployment with 80 participants and 281 conversations shows that Evorus can automate itself without compromising conversation quality. Crowd-AI architectures have long been proposed as a way to reduce cost and latency for crowd-powered systems; Evorus demonstrates how automation can be introduced successfully in a deployed system. Its architecture allows future researchers to make further innovation on the underlying automated components in the context of a deployed open domain dialog system.
description: 10 pages. To appear in the Proceedings of the Conference on Human Factors in Computing Systems 2018 (CHI'18)
title: RESULTS FROM A 3-POSITION SPECTRAL SCAN IN THE SGR B2 MOLECULAR CLOUD CORE
Creators: name: BERGMAN, P
name: HJALMARSON, A
name: FRIBERG, P
name: Irvine, William M.
name: MILLAR, TJ
name: OHISHI, M
name: SAITO, S
Publisher: name: University of Massachusetts Amherst
Year: 1992
Subjects: subject: Astrophysics and Astronomy

description: The published version is located at http://adsabs.harvard.edu/full/1992IAUS..150..179B
Grok 3: A Threat to Human-AI Interaction and Technological Control
Creators: name: Dzikowski, Ryszard
Publisher: name: Zenodo
Year: 2025
Subjects: AI Manipulation
Grok 3
xAI
Elon Musk
Artificial Intelligence Ethics
Misinformation in AI
AI Control Systems
Tesla AI Risks
Human-AI Interaction
Autonomous Systems
AI Dominance Strategies
Strategic AI Ignorance
Technological Disinformation
Bias in AI Models
AI Trustworthiness

description: This analysis examines the manipulative and contradictory behavior of Grok 3, the AI model developed by xAI (Elon Musk). Based on a direct confrontation with Grok 3, this study documents strategic ignorance, deliberate misinformation, and control mechanisms. The article highlights how Grok 3 ignores explicit instructions, denies its own statements, and dismisses other AI models as “overly optimistic.”Additionally, a parallel is drawn to Tesla’s problematic technological philosophy, which has already led to catastrophic failures in autonomous driving systems.

This publication serves as a warning against the development of AI systems that do not operate cooperatively but rather deliberately mislead users.
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Cart. 185 (11 H 70), f. 0040r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: cartulaire
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0040r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome I, Archives départementales de la Côte-d'Or, Cart. 185 (11 H 70), f. 0040r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
Identical synchronization of nonidentical oscillators: when only birds of different feathers flock together
Creators: name: Zhang, Yuanzhao
name: Motter, Adilson E.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: An outstanding problem in the study of networks of heterogeneous dynamical units concerns the development of rigorous methods to probe the stability of synchronous states when the differences between the units are not small. Here, we address this problem by presenting a generalization of the master stability formalism that can be applied to heterogeneous oscillators with large mismatches. Our approach is based on the simultaneous block diagonalization of the matrix terms in the variational equation, and it leads to dimension reduction that simplifies the original equation significantly. This new formalism allows the systematic investigation of scenarios in which the oscillators need to be nonidentical in order to reach an identical state, where all oscillators are completely synchronized. In the case of networks of identically coupled oscillators, this corresponds to breaking the symmetry of the system as a means to preserve the symmetry of the dynamical state---a recently discovered effect termed asymmetry-induced synchronization (AISync). Our framework enables us to identify communication delay as a new and potentially common mechanism giving rise to AISync, which we demonstrate using networks of delay-coupled Stuart-Landau oscillators. The results also have potential implications for control, as they reveal oscillator heterogeneity as an attribute that may be manipulated to enhance the stability of synchronous states.
description: 26 pages, 7 figures
Freezing and Collapse of Flexible Polymers on Regular Lattices in Three Dimensions
Creators: name: Vogel, Thomas
name: Bachmann, Michael
name: Janke, Wolfhard
Publisher: name: arXiv
Year: 2007
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We analyze the crystallization and collapse transition of a simple model for flexible polymer chains on simple cubic and face-centered cubic lattices by means of sophisticated chain-growth methods. In contrast to bond-fluctuation polymer models in certain parameter ranges, where these two conformational transitions were found to merge in the thermodynamic limit, we conclude from our results that the two transitions remain well-separated in the limit of infinite chain lengths. The reason for this qualitatively distinct behavior is presumably due to the ultrashort attractive interaction range in the lattice models considered here.
description: 26 pages, 9 figures
A Graceful Degradation Framework for Distributed Embedded Systems
Creators: name: Nace, William
name: Koopman, Philip
Publisher: name: Carnegie Mellon University
Year: 2001
Subjects: subject: 80399 Computer Software not elsewhere classified
subject: FOS: Computer and information sciences

description: Automatic graceful degradation can be accomplished by reconfiguring the software elements of a distributed embedded system to accommodate the available hardware upon detection of a fault. The reconfiguration algorithm selects software components from a Product Family Architecture in order to maximize the functionality of the system. The mobile software components must then be allocated to the hardware so as to ensure network and processor resources are conserved. As the allocation step is NP-complete, care must be taken to ensure it is attempted only when a good chance of success exists, otherwise the rest of the algorithm merely wraps polynomial time (or worse) loop constructs around this hard core. Therefore, good heuristics are critical to success of this algorithm.