cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The entropy of dense non-commutative fermion gases
Creators: name: Kriel, Johannes N.
name: Scholtz, Frederik G.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the properties of two- and three-dimensional non-commutative fermion gases with fixed total z-component of angular momentum, J_z, and at high density for the simplest form of non-commutativity involving constant spatial commutators. Analytic expressions for the entropy and pressure are found. The entropy exhibits non-extensive behaviour while the pressure reveals the presence of incompressibility in two, but not in three dimensions. Remarkably, for two-dimensional systems close to the incompressible density, the entropy is proportional to the square root of the system size, i.e., for such systems the number of microscopic degrees of freedom is determined by the circumference, rather than the area (size) of the system. The absence of incompressibility in three dimensions, and subsequently also the absence of a scaling law for the entropy analogous to the one found in two dimensions, is attributed to the form of the non-commutativity used here, the breaking of the rotational symmetry it implies and the subsequent constraint on J_z, rather than the angular momentum J. Restoring the rotational symmetry while constraining the total angular momentum J seems to be crucial for incompressibility in three dimensions. We briefly discuss ways in which this may be done and point out possible obstacles.
description: 15 pages, 10 figures
Some aspects of generalized Dunkl-Williams constant in Banach spaces
Creators: name: Zhou, Haoyu
name: Liu, Qi
name: Wang, Yuxin
Publisher: name: arXiv
Year: 2025
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: F.2.2
subject: 46B20, 46C15

description: This article delves into an exploration of two innovative constants, namely DW(X,α,\b{eta}) and DWB (X,α,\b{eta}), both of which constitute extensions of the Dunkl-Williams constant. We derive both the upper and lower bounds for these two constants and establish two equivalent relations between them. Moreover, we elucidate the relationships between these constants and several well-known constants. Additionally, we have refined the value of the DWB (X,α,\b{eta}) constant in certain specific Banach spaces.
description: for associated mpeg file, see http://myhost.domain/file.mpg
Zero-one laws in simultaneous and multiplicative Diophantine approximation
Creators: name: Li, Liangpan
Publisher: name: arXiv
Year: 2012
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11J13, 11J83

description: Answering two questions of Beresnevich and Velani, we develop zero-one laws in both simultaneous and multiplicative Diophantine approximation. Our proofs rely on a Cassels-Gallagher type theorem as well as a higher-dimensional analogue of the cross fibering principle of Beresnevich, Haynes and Velani.
Escape from Vela X
Creators: name: Hinton, James
name: Funk, Stefan
name: Parsons, Robert
name: Ohm, Stefan
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Whilst the Vela pulsar and its associated nebula are often considered as the archetype of a system powered by a \sim10^4 year old isolated neutron star, many features of the spectral energy distribution of this pulsar wind nebula are both puzzling and unusual. Here we develop a model that for the first time relates the main structures in the system, the extended radio nebula (ERN) and the X-ray cocoon through continuous injection of particles with a fixed spectral shape. We argue that diffusive escape of particles from the ERN can explain the steep Fermi-LAT spectrum. In this scenario Vela X should produce a distinct feature in the locally-measured cosmic ray electron spectrum at very high energies. This prediction can be tested in the future using the Cherenkov Telescope Array (CTA). If particles are indeed released early in the evolution of PWNe and can avoid severe adiabatic losses, PWN provide a natural explanation for the rising positron fraction in the local CR spectrum.
description: Accepted for publication in Astrophysical Journal Letters
Degeneracy in the characterization of non-transiting planets from transit timing variations
Creators: name: Boué, Gwenaël
name: Oshagh, Mahmoudreza
name: Montalto, Marco
name: Santos, Nuno C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The transit timing variation (TTV) method allows the detection of non-transiting planets through their gravitational perturbations. Since TTVs are strongly enhanced in systems close to mean-motion resonances (MMR), even a low mass planet can produce an observable signal. This technique has thus been proposed to detect terrestrial planets. In this letter, we analyse TTV signals for systems in or close to MMR in order to illustrate the difficulties arising in the determination of planetary parameters. TTVs are computed numerically with an n-body integrator for a variety of systems close to MMR. The main features of these TTVs are also derived analytically. Systems deeply inside MMR do not produce particularly strong TTVs, while those close to MMR generate quasiperiodic TTVs characterised by a dominant long period term and a low amplitude remainder. If the remainder is too weak to be detected, then the signal is strongly degenerate and this prevents the determination of the planetary parameters. Even though an Earth mass planet can be detected by the TTV method if it is close to a MMR, it may not be possible to assert that this planet is actually an Earth mass planet. On the other hand, if the system is right in the center of a MMR, the high amplitude oscillation of the TTV signal vanishes and the detection of the perturber becomes as difficult as it is far from MMR.
description: 5 pages, 3 figures, submitted to MNRAS
Phonon and structural changes in deformed Bernal stacked bilayer graphene
Creators: name: Frank, Otakar
name: Bousa, Milan
name: Riaz, Ibtsam
name: Jalil, Rashid
name: Novoselov, Kostya S.
name: Tsoukleri, Georgia
name: Parthenios, John
name: Kavan, Ladislav
name: Papagelis, Konstantinos
name: Galiotis, Costas
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We present the first Raman spectroscopic study of Bernal bilayer graphene flakes under uniaxial tension. Apart from a purely mechanical behavior in flake regions where both layers are strained evenly, certain effects stem from inhomogeneous stress distribution across the layers. These phenomena such as the removal of inversion symmetry in bilayer graphene may have important implications in the band-gap engineering providing an alternative route to induce the formation of a band-gap.
description: 21 pages, 7 figures
Comments on "Plasma oscillations and nonextensive statistics"
Creators: name: Chen, Xiao-Chang
name: Li, X. Q.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: The paper, authored by J. A. S. Lima et al, was published in Phys. Rev. E in 2000 has discussed the dispersion relation and Landau damping of Langmuir wave in the context of the nonextensive statistics proposed by Tsallis. It has been cited by many authors because the dispersion relation in Tsallis formalism present a good fit to the experimental data when q<1, while the classical result based on Maxwellian distribution only provides a crude description. However, the results obtained in this paper are problematic. In this comments on the paper we shall derive the correct analytic formulas both for the dispersion relation and Landau damping in Tsallis formalism. We hope that this comments will be useful in providing the correct results.
description: 6 pages
Sedimentology and stratigraphy of placer gold deposits of Haggart Creek, central Yukon territory
Creators: name: Weston, Leyla Halide
Publisher: name: University of Calgary
Year: 1999
Subjects: subject: QE195 .W37 1999A
subject: Additional Copy: QE195 .W37 1999 Gallagher geo thesis collection and QE195 .W37 1999 AINA collection
subject: Placer deposits--Yukon Territory--Haggart Creek region
subject: Gold ores (geology)--Yukon Territory--Haggart Creek region
subject: Sedimentation and deposition--Yukon Territory--Haggart Creek region
subject: Geology, Stratigraphic
subject: Haggart Creek region--Yukon Territory

description: Bibliography: p. 149-156
Magnetotransport properties of iron microwires fabricated by focused electron beam induced autocatalytic growth
Creators: name: Porrati, F.
name: Sachser, R.
name: Walz, M. -M.
name: Vollnhals, F.
name: Steinrück, H. -P.
name: Marbach, H.
name: Huth, M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We have prepared iron microwires in a combination of focused electron beam induced deposition (FEBID) and autocatalytic growth from the iron pentacarbonyl, Fe(CO)5, precursor gas under UHV conditions. The electrical transport properties of the microwires were investigated and it was found that the temperature dependence of the longitudinal resistivity (rhoxx) shows a typical metallic behaviour with a room temperature value of about 88 microΩ cm. In order to investigate the magnetotransport properties we have measured the isothermal Hall-resistivities in the range between 4.2 K and 260 K. From these measurements positive values for the ordinary and the anomalous Hall coefficients were derived. The relation between anomalous Hall resistivity (rhoAN) and longitudinal resistivity is quadratic, rhoAN rho^2 xx, revealing an intrinsic origin of the anomalous Hall effect. Finally, at low temperature in the transversal geometry a negative magnetoresistance of about 0.2 % was measured.
An analytical solution of Shallow Water system coupled to Exner equation
Creators: name: Berthon, Christophe
name: Cordier, Stéphane
name: Le, Minh H.
name: Delestre, Olivier
Publisher: name: arXiv
Year: 2011
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: In this paper, an exact smooth solution for the equations modeling the bedload transport of sediment in Shallow Water is presented. This solution is valid for a large family of sedimentation laws which are widely used in erosion modeling such as the Grass model or those of Meyer-Peter & Muller. One of the main interest of this solution is the derivation of numerical benchmarks to valid the approximation methods.
Wide-band current preamplifier for conductance measurements with large input capacitance
Creators: name: Kretinin, Andrey V.
name: Chung, Yunchul
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A wide-band current preamplifier based on a composite operational amplifier is proposed. It has been shown that the bandwidth of the preamplifier can be significantly increased by enhancing the effective open-loop gain of the composite preamplifier. The described preamplifier with current gain 10$^7$ V/A showed the bandwidth of about 100 kHz with 1 nF input shunt capacitance. The current noise of the amplifier was measured to be about 46 fA/$\sqrt{\rm Hz}$ at 1 kHz, close to the design noise minimum. The voltage noise was found to be about 2.9 nV/$\sqrt{\rm Hz}$ at 1 kHz, which is in a good agreement with the value expected for the operational amplifier used in the input stage. By analysing the total noise produced by the preamplifier we found the optimal frequency range suitable for the fast lock-in measurements to be from 1 kHz to 2 kHz. To get the same signal-to-noise ratio, the reported preamplifier requires roughly 10% of the integration time used in measurements made with a conventional preamplifier.
description: 5 pages, 4 figures
Statistical Genetics and Evolution of Quantitative Traits
Creators: name: Neher, Richard A.
name: Shraiman, Boris I.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: The distribution and heritability of many traits depends on numerous loci in the genome. In general, the astronomical number of possible genotypes makes the system with large numbers of loci difficult to describe. Multilocus evolution, however, greatly simplifies in the limit of weak selection and frequent recombination. In this limit, populations rapidly reach Quasi-Linkage Equilibrium (QLE) in which the dynamics of the full genotype distribution, including correlations between alleles at different loci, can be parameterized by the allele frequencies. This review provides a simplified exposition of the concept and mathematics of QLE which is central to the statistical description of genotypes in sexual populations. We show how key results of Quantitative Genetics such as the generalized Fisher's "Fundamental Theorem", along with Wright's Adaptive Landscape, emerge within QLE from the dynamics of the genotype distribution. We then discuss under what circumstances QLE is applicable, and what the breakdown of QLE implies for the population structure and the dynamics of selection. Understanding of the fundamental aspects of multilocus evolution obtained through simplified models may be helpful in providing conceptual and computational tools to address the challenges arising in the studies of complex quantitative phenotypes of practical interest.
description: to appear in Rev.Mod.Phys
On the scaling of the distribution of daily price fluctuations in Mexican financial market index
Creators: name: Alfonso, Lester
name: Mansilla, Ricardo
name: Terrero-Escalante, Cesar A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Finance (q-fin.ST)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Economics and business
subject: FOS: Physical sciences

description: In this paper, a statistical analysis of log-return fluctuations of the IPC, the Mexican Stock Market Index is presented. A sample of daily data covering the period from $04/09/2000-04/09/2010$ was analyzed, and fitted to different distributions. Tests of the goodness of fit were performed in order to quantitatively asses the quality of the estimation. Special attention was paid to the impact of the size of the sample on the estimated decay of the distributions tail. In this study a forceful rejection of normality was obtained. On the other hand, the null hypothesis that the log-fluctuations are fitted to a $α$-stable Lévy distribution cannot be rejected at 5% significance level.
description: 13 pages, 4 figures, 4 tables
Design and validation of a multi-stage skating specific test to predict aerobic power in competivie figure skaters
Creators: name: Zapalo, Peter Paul
Publisher: name: Kinesiology
Year: 1999
Subjects: subject: GV850.4 .Z37 1999
subject: Skating--physiological aspects
subject: Exercise tests
subject: Aerobic exercises--physiological aspects

description: Bibliography: p. 73-75
Proposal for a United Nations Basic Space Technology Initiative
Creators: name: Balogh, W. R.
name: Haubold, H. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: The United Nations Programme on Space Applications, implemented by the United Nations Office for Outer Space Affairs, promotes the benefits of space-based solutions for sustainable economic and social development. The Programme assists Member States of the United Nations to establish indigenous capacities for the use of space technology and its applications. In the past the Programme has primarily been focusing on the use of space applications and on basic space science activities. However, in recent years there has been a strong interest in a growing number of space-using countries to build space technology capacities, for example, the ability to develop and operate small satellites. In reaction to this development, the United Nations in cooperation with the International Academy of Astronautics has been organizing annual workshops on small satellites in the service of developing countries. Space technology related issues have also been addressed as part of various other activities of the Programme on Space Applications. Building on these experiences, the Office for Outer Space Affairs is now considering the launch of a new initiative, preliminarily titled the United Nations Basic Space Technology Initiative (UNBSTI), to promote basic space technology development. The initiative would be implemented in the framework of the Programme on Space Applications and its aim would be to help building sustainable capacities for basic space technology education and development, thereby advancing the operational use of space technology and its applications.
description: 12 pages
Lifetime statistics of quantum chaos studied by a multiscale analysis
Creators: name: Di Falco, A.
name: Krauss, T. F.
name: Fratalocchi, A.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In a series of pump and probe experiments, we study the lifetime statistics of a quantum chaotic resonator when the number of open channels is greater than one. Our design embeds a stadium billiard into a two dimensional photonic crystal realized on a Silicon-on-insulator substrate. We calculate resonances through a multiscale procedure that combines graph theory, energy landscape analysis and wavelet transforms. Experimental data is found to follow the universal predictions arising from random matrix theory with an excellent level of agreement.
description: 4 pages, 6 figures
The language of living: Furniture for the twenty first century - a workstation for the home office and small living space
Creators: name: Doyle-Frisch, Barbara L.
Publisher: name: Environmental Design
Year: 1998
Subjects: subject: NA7125 .D69 1998
subject: Architecture, domestic
subject: Office furniture - Design
subject: Microcomputer workstations - Design
subject: Design, Industrial
subject: Human engineering

description: Bibliography: p. 189-212
Distributed Robust Multi-Cell Coordinated Beamforming with Imperfect CSI: An ADMM Approach
Creators: name: Shen, Chao
name: Chang, Tsung-Hui
name: Wang, Kun-Yu
name: Qiu, Zhengding
name: Chi, Chong-Yung
Publisher: name: arXiv
Year: 2011
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: Multi-cell coordinated beamforming (MCBF), where multiple base stations (BSs) collaborate with each other in the beamforming design for mitigating the inter-cell interference, has been a subject drawing great attention recently. Most MCBF designs assume perfect channel state information (CSI) of mobile stations (MSs); however CSI errors are inevitable at the BSs in practice. Assuming elliptically bounded CSI errors, this paper studies the robust MCBF design problem that minimizes the weighted sum power of BSs subject to worst-case signal-to-interference-plus-noise ratio (SINR) constraints on the MSs. Our goal is to devise a distributed optimization method that can obtain the worst-case robust beamforming solutions in a decentralized fashion, with only local CSI used at each BS and little backhaul signaling for message exchange between BSs. However, the considered problem is difficult to handle even in the centralized form. We first propose an efficient approximation method in the centralized form, based on the semidefinite relaxation (SDR) technique. To obtain the robust beamforming solution in a decentralized fashion, we further propose a distributed robust MCBF algorithm, using a distributed convex optimization technique known as alternating direction method of multipliers (ADMM). We analytically show the convergence of the proposed distributed robust MCBF algorithm to the optimal centralized solution and its better bandwidth efficiency in backhaul signaling over the existing dual decomposition based algorithms. Simulation results are presented to examine the effectiveness of the proposed SDR method and the distributed robust MCBF algorithm.
Electron states and magneto-transport in a graphene geometry with a fractal distribution of holes
Creators: name: Pal, Biplab
name: Chakrabarti, Arunava
name: Bhattacharya, Nitai
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider an infinite graphene geometry where bonds and sites have been removed selectively to map it onto an effective Sierpinski gasket comprising of hexagons. We show that such a structure is capable of sustaining an infinite number of extended single particle states inspite of the absence of any translational order. When each basic hexagonal plaquette in the Sierpinski geometry is threaded by a magnetic flux, the spectrum exhibits bands of extended eigenstates. The bands persist for any arbitrary value of the flux but disappear again as the flux becomes equal to half the fundamental flux quantum. The localization - de-localization issues are discussed thoroughly along with the computation of two terminal magneto-transport of finite versions of the lattice. The numerical results corroborate our analytical findings.
description: 16 pages, 7 figures
Interdependent binary choices under social influence: phase diagram for homogeneous unbiased populations
Creators: name: del Río, Ana Fernández
name: Korutcheva, Elka
name: de la Rubia, Javier
Publisher: name: arXiv
Year: 2012
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Coupled Ising models are studied in a discrete choice theory framework, where they can be understood to represent interdependent choice making processes for homogeneous populations under social influence. Two different coupling schemes are considered. The nonlocal or group interdependence model is used to study two interrelated groups making the same binary choice. The local or individual interdependence model represents a single group where agents make two binary choices which depend on each other. For both models, phase diagrams, and their implications in socioeconomic contexts, are described and compared in the absence of private deterministic utilities (zero opinion fields).
description: 17 pages, 3 figures. This is the pre-peer reviewed version of the following article: Ana Fern\'andez del R\'io, Elka Korutcheva and Javier de la Rubia, Interdependent binary choices under social influence, Wiley's Complexity, 2012; which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/cplx.21397/abstract
An evaluation of secondary suite regulatory implementation methods in low-density residential districts: Issues and opportunities for the city of Calgary
Creators: name: Legge, Adam W.
Publisher: name: Environmental Design
Year: 1999
Subjects: subject: HD7305 .C3 L44 1999
subject: Housing policy - Alberta - Calgary
subject: Accessory apartments--law and legislation--Alberta--Calgary
subject: Accessory apartments--law and legislation--British Columbia
subject: Housing - Alberta - Calgary
subject: Building laws--Alberta--Calgary

description: Bibliography
Uncertain and Approximative Knowledge Representation to Reasoning on Classification with a Fuzzy Networks Based System
Creators: name: Omri, Mohamed Nazih
Publisher: name: arXiv
Year: 2012
Subjects: subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: The approach described here allows to use the fuzzy Object Based Representation of imprecise and uncertain knowledge. This representation has a great practical interest due to the possibility to realize reasoning on classification with a fuzzy semantic network based system. For instance, the distinction between necessary, possible and user classes allows to take into account exceptions that may appear on fuzzy knowledge-base and facilitates integration of user's Objects in the base. This approach describes the theoretical aspects of the architecture of the whole experimental A.I. system we built in order to provide effective on-line assistance to users of new technological systems: the understanding of "how it works" and "how to complete tasks" from queries in quite natural languages. In our model, procedural semantic networks are used to describe the knowledge of an "ideal" expert while fuzzy sets are used both to describe the approximative and uncertain knowledge of novice users in fuzzy semantic networks which intervene to match fuzzy labels of a query with categories from our "ideal" expert.
description: arXiv admin note: text overlap with arXiv:1206.1794
Quantitative ergodic theorems for weakly integrable functions
Creators: name: Haynes, Alan
Publisher: name: arXiv
Year: 2011
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Under suitable hypotheses we establish a quantitative pointwise ergodic theorem which applies to trimmed Birkhoff sums of weakly integrable functions.
description: 10 pages
An exploration into bear deterrents as related to mountain biking, and the design of an ultrasonic bear warning device
Creators: name: Schmor, Mathew R.
Publisher: name: Environmental Design
Year: 1999
Subjects: subject: QL737 .C27 S38 1999
subject: Bear attacks - Safety measures
subject: All terrain cycling - Safety measures
subject: Grizzly bear
subject: Black bear
subject: Ultrasonics
subject: Wilderness area users
subject: Design, Industrial

description: Bibliography: p. 129-132.
Managing global climate change: Addressing climate change in Canadian organizations
Creators: name: Kozey, James M.
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: HD 30.255 K69 2000
subject: Environmental management--Canada
subject: Environmental responsibility - Canada
subject: Climatic changes
subject: Industrial management - Environmental aspects - Canada
subject: ISO 14001 series standards
subject: Corporate culture - Canada

description: Bibliography: p. 117-127
Revisiting Calgary's +15 system: Policies and future directions
Creators: name: Chalmers, Cameron L.
Publisher: name: Environmental Design
Year: 1999
Subjects: subject: TE279.5 .C48 1999
subject: Pedestrian areas--Alberta--Calgary
subject: Central business districts - Alberta - Calgary
subject: City planning - Alberta - Calgary

description: Bibliography: p. 160-166
Integration of tallgrass communities in open space systems of southern Ontario municipalities: Development of a site selection process
Creators: name: Long, Krista
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: HT169 .C32 O55 2000
subject: City planning - Ontario
subject: Land use, Urban - Ontario
subject: Grassland conservation - Ontario
subject: Restoration ecology - Ontario

description: Bibliography: p. 149-158
Fostering continuous innovation in design with an integrated knowledge management approach
Creators: name: Xu, J.
name: Houssin, Rémy
name: Caillaud, Emmanuel
name: Gardoni, Mickaël
Publisher: name: arXiv
Year: 2012
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences

description: In the global competition, companies are propelled by an immense pressure to innovate. The trend to produce more new knowledge-intensive products or services and the rapid progress of information technologies arouse huge interest on knowledge management for innovation. However the strategy of knowledge management is not widely adopted for innovation in industries due to a lack of an effective approach of their integration. This study aims to help the designers to innovate more efficiently based on an integrated approach of knowledge management. Based on this integrated approach, a prototype of distributed knowledge management system for innovation is developed. An industrial application is presented and its initial results indicate the applicability of the approach and the prototype in practice.
Performance Enhancement of Ad Hoc Networks with Janitor Based Routing
Creators: name: Siddique, Isnain
name: Shams, Rushdi
name: Hashem, M. M. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We propose and analyze a new on the fly strategy that discovers, repairs and maintains routes in hierarchical and distributed fashion called Janitor Based Routing (JBR). The main motivation behind our JBR protocol is to decrease flooding and routing overhead and increase efficiencies in packet movement. An analytical model for the proposed JBR is presented and detailed simulation is used to observe the performance of JBR. This route discovery and maintenance protocol clearly achieved improvement in terms of reduction of flooding, routing overhead, and, hence, provides enhanced reliability.
Structure formation in Multiple Dark Matter cosmologies with long-range scalar interactions
Creators: name: Baldi, Marco
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: (Abridged) An interaction between Cold Dark Matter (CDM) and a classical scalar field playing the role of the cosmic dark energy (DE) might provide long-range dark interactions without conflicting with solar system bounds. Although presently available observations allow to constrain such interactions to a few percent of the gravitational strength, some recent studies have shown that if CDM is composed by two different particle species having opposite couplings to the DE field, such tight constraints can be considerably relaxed, allowing for long-range scalar forces of order gravity without significantly affecting observations both at the background and at the linear perturbations level. In the present work, we extend the investigation of such Multiple Dark Matter scenarios to the nonlinear regime of structure formation, by presenting the first N-body simulations ever performed for these cosmologies. Our results highlight some characteristic footprints of long-range scalar forces that arise only in the nonlinear regime for specific models that would be otherwise practically indistinguishable from the standard LCDM scenario both in the background and in the growth of linear density perturbations. Among these effects, the formation of "mirror" cosmic structures in the two CDM species, the suppression of the nonlinear matter power spectrum at k > 1 h/Mpc, and the fragmentation of collapsed halos, represent peculiar features that might provide a direct way to constrain this class of cosmological models.
description: 11 pages, 4 figures. Submitted to MNRAS
How I Learned to Stop Worrying and Love ChatGPT
Creators: name: Przymus, Piotr
name: Fejzer, Mikołaj
name: Narębski, Jakub
name: Stencel, Krzysztof
Publisher: name: arXiv
Year: 2025
Subjects: subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: In the dynamic landscape of software engineering, the emergence of ChatGPT-generated code signifies a distinctive and evolving paradigm in development practices. We delve into the impact of interactions with ChatGPT on the software development process, specifically analysing its influence on source code changes. Our emphasis lies in aligning code with ChatGPT conversations, separately analysing the user-provided context of the code and the extent to which the resulting code has been influenced by ChatGPT. Additionally, employing survival analysis techniques, we examine the longevity of ChatGPT-generated code segments in comparison to lines written traditionally. The goal is to provide valuable insights into the transformative role of ChatGPT in software development, illuminating its implications for code evolution and sustainability within the ecosystem.
Two methods of harvesting native grass community seed
Creators: name: Cerney, Dawna Lynn
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: SB439.26 .C2 C47 2000
subject: Native plants for cultivation--Alberta
subject: Revegetation - Alberta
subject: Grasses--harvesting--Alberta
subject: Prairie plants--Alberta

description: Bibliography: p. 99-106
Modeling the mechanics of amorphous solids at different length and time scales
Creators: name: Rodney, David
name: Tanguy, Anne
name: Vandembroucq, Damien
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We review the recent literature on the simulation of the structure and deformation of amorphous glasses, including oxide and metallic glasses. We consider simulations at different length and time scales. At the nanometer scale, we review studies based on atomistic simulations, with a particular emphasis on the role of the potential energy landscape and of the temperature. At the micrometer scale, we present the different mesoscopic models of amorphous plasticity and show the relation between shear banding and the type of disorder and correlations (e.g. elastic) included in the models. At the macroscopic range, we review the different constitutive laws used in finite element simulations. We end the review by a critical discussion on the opportunities and challenges offered by multiscale modeling and transfer of information between scales to study amorphous plasticity.
description: 58 pages, 14 figures
The eye of the holder: A design system for eyewear
Creators: name: Tharp, Biba
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: RE952 .T48 2000
subject: Eyeglasses
subject: Optometrists
subject: Optometry
subject: Display of merchandise
subject: Showrooms - Design
subject: Design, Industrial

description: Bibliography: p. 91-98
Mental Geometry
Creators: name: Bouleau, Nicolas
Publisher: name: arXiv
Year: 2025
Subjects: subject: History and Overview (math.HO)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics

description: This article illustrates pedagogy through training in the handling of abstractions. Mental arithmetic is not limited to numerical calculation; one can mentally calculate primitives and simplify analytical expressions. Even if there is software that does this very well, this training retains its pedagogical value. Can we go further and consider geometric mental arithmetic: mentally proceeding with transformations of simple figures allowing the calculation of areas or volumes? It turns out that the intuition that allowed Archimedes to obtain his main geometric results, if we take only the ideas without the old-fashioned style, provides the opportunity for a pleasant and quite rich mental game that I present here in the form of a short narrative dialogue, not a philosophical tale because it does not bring any thesis, simply a story to be classified among the invitations to exercise the mind. It starts with the area of a triangle and ends with Guldin's two theorems.
La inteligencia artificial: Un aliado seguro en los distintos ámbitos
Creators: name: Carrasco Flores, Ángel Giovanny
name: Meza, Axel
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 460299
subject: Artificial intelligence not elsewhere classified

description: Un análisis integral de los impactos positivos de la inteligencia artificial en la sociedad, abordando aspectos laborales, educativos, médicos y de ciberseguridad, resaltando sus contribuciones significativas en múltiples ámbitos de la vida contemporánea
Perceptual Disturbances in Relation to Perceptual and Electrical Noise
Creators: name: Titleman, Mark
Publisher: name: figshare
Year: 2023
Subjects: Clinical and health psychology not elsewhere classified

description: This proposal incorporates three experiments concerning perceptual disturbances: one analyzing eye movement and associated electrical activity in hallucinating patients, another assessing dream recall in patients exposed to weak pulsed electromagnetic fields (EMF), and finally the examination of phosphene induction via transcranial magnetic stimulation (TMS) and associated electrical activity. The direct link between perceptual noise, noise in the brain’s electrical activity, and perceptual disturbances can be established via the analysis of eye movement and EEG readings and the examination of their differences between the treatment and control groups. Another direct link can be uncovered between the generation of electrical noise via pulsed EMF and perceptual disturbances in the form of improved dream recall. Finally, the effects of TMS on reducing perceptual disturbances and inducing phosphenes can be compared within the treatment group and related to the control group.
Electrochemical behaviour of monolayer and bilayer graphene
Creators: name: Valota, Anna T.
name: Kinloch, Ian A.
name: Novoselov, Kostya S.
name: Casiraghi, Cinzia
name: Eckmann, Axel
name: Hill, Ernie W.
name: Dryfe, Robert A. W.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Results of a study on the electrochemical properties of exfoliated single and multilayer graphene flakes are presented. Graphene flakes were deposited on silicon/silicon oxide wafers to enable fast and accurate characterization by optical microscopy and Raman spectroscopy. Conductive silver paint and silver wires were used to fabricate contacts; epoxy resin was employed as masking coating in order to expose a stable, well defined area of graphene. Both multilayer and monolayer graphene microelectrodes showed quasi-reversible behavior during voltammetric measurements in potassium ferricyanide. However, the standard heterogeneous charge transfer rate constant, k°, was estimated to be higher for mono-layer graphene flakes.
description: 20 pages, 8 figures. To appear in ACS Nano
An investigation of the potential to restore native trout populations: Goat Creek, Banff national park, Alberta
Creators: name: Tough, Elizabeth
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: SH167 .T86 T68 2000
subject: Trout - Alberta - Goat Creek
subject: Fish populations - Alberta - Goat Creek
subject: Fish stocking - Alberta - Goat Creek
subject: Fishery management - Alberta
subject: Goat Creek (Alta.)
subject: Banff National Park (Alta.)

description: Bibliography: p. 103-111
Immirzi parameter and Noether charges in first order gravity
Creators: name: Durka, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The framework of SO(3,2) constrained BF theory applied to gravity makes it possible to generalize formulas for gravitational diffeomorphic Noether charges (mass, angular momentum, and entropy). It extends Wald's approach to the case of first order gravity with a negative cosmological constant, the Holst modification and the topological terms (Nieh-Yan, Euler, and Pontryagin). Topological invariants play essential role contributing to the boundary terms in the regularization scheme for the asymptotically AdS spacetimes, so that the differentiability of the action is automatically secured. Intriguingly, it turns out that the black hole thermodynamics does not depend on the Immirzi parameter for the AdS-Schwarzschild, AdS-Kerr, and topological black holes, whereas a nontrivial modification appears for the AdS-Taub-NUT spacetime, where it impacts not only the entropy, but also the total mass.
description: 17 pages, (new template, corrected typos), to appear in Proceedings of "Quantum Theory and Symmetries 7" Prague, Journal of Physics: Conference Series (JPCS)
New insights into black bodies
Creators: name: Ballesteros, F. J.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Planck's law describes the radiation of black bodies. The study of its properties is of special interest, as black bodies are a good description for the behavior of many phenomena. In this work a new mathematical study of Planck's law is performed and new properties of this old acquaintance are obtained. As a result, the exact form for the locus in a color-color diagrams has been deduced, and an analytical formula to determine with precision the black body temperature of an object from any pair of measurements has been developed. Thus, using two images of the same field obtained with different filters, one can compute a fast estimation of black body temperatures for every pixel in the image, that is, a new image of the black body temperatures for all the objects in the field. Once these temperatures are obtained, the method allows, as a consequence, a quick estimation of their emission in other frequencies, assuming a black body behavior. These results provide new tools for data analysis.
description: 6 pages, 5 figures. Accepted in EPL
A multi-regional analysis of heritage management: An approach to building new partnerships
Creators: name: Wood, Barry Paul
Publisher: name: Environmental Design
Year: 2000
Subjects: subject: FC3664 .W28 W66 2000
subject: Historic Sites - Alberta - Big Rock - Management
subject: Indians of North America - Alberta - Antiquities
subject: Waterton Lakes National Park (Alta.) - Antiquities

description: Bibliography: p. 218-261
Measuring attitudes of ridership regarding the design of LRT stations using CAD and VR as an assessment tool
Creators: name: Wang, Zibin
Publisher: name: Environmental Design
Year: 1999
Subjects: subject: NA6315 .C32 C359 1999
subject: Street-railroads - Alberta - Calgary - Designs and plans
subject: Commuters - Alberta - Calgary - Attitudes
subject: Computer-aided design
subject: Architectural design
subject: Computer graphics

description: Bibliography: p. 67-70
SINARAME - El Sistema Argentino de Radares Meteorológicos, Aportes de INVAP a su desarrollo
Creators: name: Renolfi, Federico Pablo
Publisher: name: Zenodo
Year: 2018
Subjects: SINARAME; INVAP; RMA; radar meteorologico; dual-pol; weather radar

description: Presentation for the IV Simposio de Radarización y Sistemas de Alertas Hidrometeorológicos del Cono Sur 26 y 27 de Septiembre de 2018 Córdoba, Argentina
Inverse Depolarization: A Potential Probe of Internal Faraday Rotation and Helical Magnetic Fields in Extragalactic Radio Jets
Creators: name: Homan, Daniel C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Motivated by recent observations that show increasing fractional linear polarization with increasing wavelength in a small number of optically thin jet features, i.e. "inverse depolarization", we present a physical model that can explain this effect and may provide a new and complementary probe of the low energy particle population and possible helical magnetic fields in extragalactic radio jets. In our model, structural inhomogeneities in the jet magnetic field create cancellation of polarization along the line of sight. Internal Faraday rotation, which increases like wavelength squared, acts to align the polarization from the far and near sides of the jet, leading to increased polarization at longer wavelengths. Structural inhomogeneities of the right type are naturally produced in helical magnetic fields and will also appear in randomly tangled magnetic fields. We explore both alternatives and find that, for random fields, the length scale for tangling cannot be too small a fraction of the jet diameter and still be consistent with the relatively high levels of fractional polarization observed in these features. We also find that helical magnetic fields naturally produce transverse structure for inverse depolarization which may be observable even in partially resolved jets.
description: 12 pages, 4 figures, accepted for publication in ApJL
Black Holes and Fourfolds
Creators: name: Bena, Iosif
name: Triendl, Hagen
name: Vercnocke, Bert
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We establish the relation between the structure governing supersymmetric and non-supersymmetric four- and five-dimensional black holes and multicenter solutions and Calabi-Yau flux compactifications of M-theory and type IIB string theory. We find that the known BPS and almost-BPS multicenter black hole solutions can be interpreted as GKP compactifications with (2,1) and (0,3) imaginary self-dual flux. We also show that the most general GKP compactification leads to new classes of BPS and non-BPS multicenter solutions. We explore how these solutions fit into N=2 truncations, and elucidate how supersymmetry becomes camouflaged. As a necessary tool in our exploration we show how the fields in the largest N=2 truncation fit inside the six-torus compactification of eleven-dimensional supergravity.
description: 26 pages, 1 figure
Trace Lasso: a trace norm regularization for correlated designs
Creators: name: Grave, Edouard
name: Obozinski, Guillaume
name: Bach, Francis
Publisher: name: arXiv
Year: 2011
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: Using the $\ell_1$-norm to regularize the estimation of the parameter vector of a linear model leads to an unstable estimator when covariates are highly correlated. In this paper, we introduce a new penalty function which takes into account the correlation of the design matrix to stabilize the estimation. This norm, called the trace Lasso, uses the trace norm, which is a convex surrogate of the rank, of the selected covariates as the criterion of model complexity. We analyze the properties of our norm, describe an optimization algorithm based on reweighted least-squares, and illustrate the behavior of this norm on synthetic data, showing that it is more adapted to strong correlations than competing methods such as the elastic net.
The factorisation of glue and mass terms in SU(N) gauge theories
Creators: name: Lavelle, Martin
name: McMullan, David
name: Sharma, Poonam
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we investigate the structure of the glue in Zwanziger's gauge invariant expansion for the A^2-type mass term in Yang-Mills theory. We show how to derive this expansion, in terms of the inverse covariant Laplacian, and extend it to higher orders. In particular, we give an explicit expression, for the first time, for the next to next to leading order term. We further show that the expansion is not unique and give examples of the resulting ambiguity.
description: 22 pages