cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Leading Indicators and Spatial Interactions: A Crime Forecasting Model for Proactive Police Deployment
Creators: name: Cohen, Jacqueline
name: Wilpen  Gorr
name: Olligschlaeger, Andreas M.
Publisher: name: Carnegie Mellon University
Year: 2004
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: Based on crime attractor and displacement theories of environmental criminology, we specify a leading indicator model for forecasting serious property and violent crimes. The model, intended for support of tactical deployment of police resources, is at the micro-level scale; namely, one-month-ahead forecasts over a grid system of 104 square grid cells 4,000 feet on a side (with approximately 100 blocks per grid cell). The leading indicators are selected lesser crimes and incivilities entering the model in two ways: 1) as time lags within grid cells and 2) time and space lags averaged over contiguous grid cells of observation grid cells. Our validation case study uses 1.3 million police records including 16 individual crime types from Pittsburgh, Pennsylvania aggregated over the grid system for a 96 month period ending in December 1998. The study uses the rolling-horizon forecast experimental design with forecasts made over the 36 month period ending in December 1998, yielding 3,774 forecast errors per forecast model. We estimated the leading indicator model using both an OLS linear regression model and a nonlinear neural network, plus included a proven univariate, extrapolative forecast method as a benchmark for a Granger causality assessment. The analytical approach to forecast validation is based on decision support requirements of police for crime prevention. Needed is information on large forecasted changes in crime. The leading indicator models have the comparative advantage over extrapolative methods of being able to forecast the largest changes in crime, those due to breaks in crime series data such as step jumps in the forecast period. Expectations for forecast results should be that they yield good if imperfect leads on where to deploy crime analysts, patrols and detectives; for example, if 50 percent of forecasted large changes were “positives,” that would be a success. The end results are that the leading indicator models provide acceptable forecasts and are significantly better than the extrapolative method in three out of four cases, and for the fourth there is a tie but poor forecast performance. The leading indicators find 38 to 54 percent of positives in the three successful cases. The resulting workload for police is quite acceptable, with on the average of 7 large change cases per month with two thirds of such cases being false positives.
A finite element method for surface diffusion: The parametric case
Creators: name: Bänsch, Eberhard
name: Morin, Pedro
name: Nochetto, Ricardo H.
Publisher: name: Weierstrass Institute
Year: 2004
Subjects: subject: Surface diffusion
subject: fourth-order parabolic problem
subject: finite elements
subject: Schur complement
subject: smoothing effect
subject: pinch-off
subject: 35K55
subject: 65M12
subject: 65M15
subject: 65M60
subject: 65Z05

description: Surface diffusion is a (4th order highly nonlinear) geometric driven motion of a surface with normal velocity proportional to the surface Laplacian of mean curvature. We present a novel variational formulation for parametric surfaces with or without boundaries. The method is semi-implicit, requires no explicit parametrization, and yields a linear system of elliptic PDE to solve at each time step. We next develop a finite element method, propose a Schur complement approach to solve the resulting linear systems, and show several significant simulations, some with pinch-off in finite time. We introduce a mesh regularization algorithm, which helps prevent mesh distortion, and discuss the use of time and space adaptivity to increase accuracy while reducing complexity.
Magnetization plateau in the S=1/2 spin ladder with alternating rung exchange
Creators: name: Japaridze, G. I.
name: Pogosyan, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have studied the ground state phase diagram of a spin ladder with alternating rung exchange $J^{n}_{\perp} = J_{\perp}[1 + (-1)^{n} δ]$ in a magnetic filed, in the limit where the rung coupling is dominant. In this limit the model is mapped onto an $XXZ$ Heisenberg chain in a uniform and staggered longitudinal magnetic fields, where the amplitude of the staggered field is $\sim δ$. We have shown that the magnetization curve of the system exhibits a plateau at magnetization equal to the half of the saturation value. The width of a plateau scales as $δ^ν$, where $ν=4/5$ in the case of ladder with isotropic antiferromagnetic legs and $ν=2$ in the case of ladder with isotropic ferromagnetic legs. We have calculated four critical fields ($H^{\pm}_{c1}$ and $H^{\pm}_{c2}$) corresponding to transitions between different magnetic phases of the system. We have shown that these transitions belong to the universality class of the commensurate-incommensurate transition.
description: 6 pages, 2 figures
Dark Galaxy Candidates at Redshift ~3.5 Detected with MUSE
Creators: name: Marino, Raffaella Anna
name: Cantalupo, Sebastiano
name: Lilly, Simon J.
name: Gallego, Sofia G.
name: Straka, Lorrie A.
name: Borisova, Elena
name: Bacon, Roland
name: Brinchmann, Jarle
name: Carollo, C. Marcella
name: Caruana, Joseph
name: Conseil, Simon
name: Contini, Thierry
name: Diener, Catrina
name: Finley, Hayley
name: Inami, Hanae
name: Leclercq, Floriane
name: Muzahid, Sowgat
name: Richard, Johan
name: Schaye, Joop
name: Wendt, Martin
name: Wisotzki, Lutz
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent theoretical models suggest that the early phase of galaxy formation could involve an epoch when galaxies are gas-rich but inefficient at forming stars: a "dark galaxy" phase. Here, we report the results of our MUSE (Multi Unit Spectroscopic Explorer) survey for dark galaxies fluorescently illuminated by quasars at $z>3$. Compared to previous studies which are based on deep narrow-band (NB) imaging, our integral field survey provides a nearly uniform sensitivity coverage over a large volume in redshift space around the quasars as well as full spectral information at each location. Thanks to these unique features, we are able to build control samples at large redshift distances from the quasars using the same data taken under the same conditions. By comparing the rest-frame equivalent width (EW$_{0}$) distributions of the Ly$α$ sources detected in proximity to the quasars and in control samples, we detect a clear correlation between the locations of high EW$_{0}$ objects and the quasars. This correlation is not seen in other properties such as Ly$α$ luminosities or volume overdensities, suggesting the possible fluorescent nature of at least some of these objects. Among these, we find 6 sources without continuum counterparts and EW$_{0}$ limits larger than $240\,\mathrmÅ$ that are the best candidates for dark galaxies in our survey at $z>3.5$. The volume densities and properties, including inferred gas masses and star formation efficiencies, of these dark galaxy candidates are similar to previously detected candidates at $z\approx2.4$ in NB surveys. Moreover, if the most distant of these are fluorescently illuminated by the quasar, our results also provide a lower limit of $t=60$ Myr on the quasar lifetime.
description: 28 pages, 13 figures, 5 tables, submitted to ApJ
The Two-Pion Exchange NN-Potential in Nuclear Matter and Nuclear Stability
Creators: name: Rapp, R.
name: Durso, J. W.
name: Wambach, J.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: A meson exchange model of the $ππ$ interaction which fits free $ππ$ scattering data is used to calculate the interactions of pions in nuclear matter as a function of nuclear density. Polarization of the nuclear medium by the pions results in a marked increase in the s-wave $ππ$ attraction at low energy. The influence of this effect on the nucleon-nucleon interaction is a corresponding increase with density of the $NN$ central potential due to the exchange of two correlated pions, resulting in an $NN$ interaction which fails to saturate. A possible mechanism for restoring the theoretical stability of nuclear matter is explored and found to be effective.
description: 19 pages LaTeX, 4 postscript figures
title: 02_0632
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
A thermoelastic contact problem with a phase transition
Creators: name: Hömberg, Dietmar
name: Khludnev, Alexander
Publisher: name: Weierstrass Institute
Year: 2004
Subjects: subject: Thermoelasticity
subject: phase transition
subject: contact problem
subject: 35K85
subject: 74N25
subject: 74F05
subject: 74M15

description: We investigate a thermomechanical contact problem with phase transitions. The system of equations consists of a quasistatic momentum balance and a semilinear energy balance. The phase transition is described by an ordinary differential equation. Different mechanical properties of the respective phases are taken care of by a mixture ansatz. We prove the existence of a weak solution and a uniqueness result, the latter only being valid in one space dimension.
Desynchronization in diluted neural networks
Creators: name: Zillmer, R.
name: Livi, R.
name: Politi, A.
name: Torcini, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The dynamical behaviour of a weakly diluted fully-inhibitory network of pulse-coupled spiking neurons is investigated. Upon increasing the coupling strength, a transition from regular to stochastic-like regime is observed. In the weak-coupling phase, a periodic dynamics is rapidly approached, with all neurons firing with the same rate and mutually phase-locked. The strong-coupling phase is characterized by an irregular pattern, even though the maximum Lyapunov exponent is negative. The paradox is solved by drawing an analogy with the phenomenon of ``stable chaos'', i.e. by observing that the stochastic-like behaviour is "limited" to a an exponentially long (with the system size) transient. Remarkably, the transient dynamics turns out to be stationary.
description: 11 pages, 13 figures, submitted to Phys. Rev. E
Change of the type of contrast structures in parabolic Neumann problems
Creators: name: Nefedov, Nikolai N.
name: Radziunas, Mindaugas
name: Schneider, Klaus R.
name: Vasil'eva, Adelaida B.
Publisher: name: Weierstrass Institute
Year: 2004
Subjects: subject: Singularly perturbed parabolic problems
subject: contrast structures
subject: 35B25
subject: 35K50
subject: 35K57

description: We consider some class of singularly perturbed nonlinear parabolic problems in the case when a solution with an interior layer changes into a solution having only boundary layers. Analytical results on this phenomenon are compared with numerical studies of some examples.
Analysis of world terror networks from the reduced Google matrix of Wikipedia
Creators: name: Zant, Samer El
name: Frahm, Klaus M.
name: Jaffres-Runser, Katia
name: Shepelyansky, Dima L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Social and Information Networks (cs.SI)
subject: Physics and Society (physics.soc-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: We apply the reduced Google matrix method to analyse interactions between 95 terrorist groups and determine their relationships and influence on 64 world countries. This is done on the basis of the Google matrix of the English Wikipedia (2017) composed of 5416537 articles which accumulate a great part of global human knowledge. The reduced Google matrix takes into account the direct and hidden links between a selection of 159 nodes (articles) appearing due to all paths of a random surfer moving over the whole network. As a result we obtain the network structure of terrorist groups and their relations with selected countries. Using the sensitivity of PageRank to a weight variation of specific links we determine the geopolitical sensitivity and influence of specific terrorist groups on world countries. We argue that this approach can find useful application for more extensive and detailed data bases analysis.
description: 9 pages, 5 figs, 2 tables, more data at http://www.quantware.ups-tlse.fr/QWLIB/wikiterrornetworks/
Tripyla filicaudata de Man 1880
Creators: name: Zullini, Aldo
Publisher: name: Zenodo
Year: 1978
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Enoplea
Triplonchida
Tripylidae
Tripyla
Tripyla filicaudata

description: 18. TRIPYLA FILICAUDATA de Man 1880
 ♂: L 2,52 mm; a,42; b;4,3; c 5,0.
Stazíoni 1 e 2.
description: Published as part of Zullini, Aldo, 1978, Nematodi liberi dell'Isola di Tavolara (Sardegna), pp. 67-76 in ACCADEMIA NAZIONALE DEI XL Estratto dai Rendiconti III (V) on page 73, DOI: 10.5281/zenodo.10814862
Lead and Mortality
Creators: name: Clay, Karen
name: Troesken, Werner
name: Haines, Michael R.
Publisher: name: Carnegie Mellon University
Year: 2010
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: This paper examines the effect of water-borne lead exposure on infant mortality in American cities over the period 1900-1920. Infants are highly sensitive to lead, and more broadly are a marker for current environmental conditions. The effects of lead on infant mortality are identified by variation across cities in water acidity and the types of service pipes that the water ran through – lead, iron, or concrete – which together determined the extent of lead exposure. Estimates that restrict the sample to cities with lead pipes and panel estimates provide further support for the causal link between water-borne lead and infant mortality. The magnitudes of the effects were large. In 1900, a decline in exposure equivalent to an increase in pH from 6.675 (25th percentile) to 7.3 (50th percentile) in cities with lead-only pipes would have been associated with a decrease in infant mortality of 7 to 33 percent or at least 12 fewer infant deaths per 1,000 live births. This paper examines the effect of water-borne lead exposure on infant mortality in American cities over the period 1900-1920. Infants are highly sensitive to lead, and more broadly are a marker for current environmental conditions. The effects of lead on infant mortality are identified by variation across cities in water acidity and the types of service pipes that the water ran through – lead, iron, or concrete – which together determined the extent of lead exposure. Estimates that restrict the sample to cities with lead pipes and panel estimates provide further support for the causal link between water-borne lead and infant mortality. The magnitudes of the effects were large. In 1900, a decline in exposure equivalent to an increase in pH from 6.675 (25th percentile) to 7.3 (50th percentile) in cities with lead-only pipes would have been associated with a decrease in infant mortality of 7 to 33 percent or at least 12 fewer infant deaths per 1,000 live births.
The temporal evolution of neutron-capture elements in the Galactic discs
Creators: name: Spina, Lorenzo
name: Meléndez, Jorge
name: Karakas, Amanda I.
name: Santos, Leonardo dos
name: Bedell, Megan
name: Asplund, Martin
name: Ramírez, Ivan
name: Yong, David
name: Alves-Brito, Alan
name: Bean, Jacob L.
name: Dreizler, Stefan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Important insights into the formation and evolution of the Galactic disc(s) are contained in the chemical compositions of stars. We analysed high-resolution and high signal to noise HARPS spectra of 79 solar twin stars in order to obtain precise determinations of their atmospheric parameters, ages ($σ$$\sim$0.4 Gyr) and chemical abundances ($σ$$
Why We Need a History of Collateral Rights: the Example of Antwerp (15th-16th Century)
Creators: name: De Ruysscher, Dave
Publisher: name: Zenodo
Year: 2021

description: The Antwerp case demonstrates that rules of commercial law were crafted in response to diverse and connected phenomena. Lawmakers took into account the needs and demands of merchants, but also strife among groups of professionals and city leaders was responsible for legal change. The legal regime concerning collateral rights proved a challenge for the Antwerp administrators. Le Marchand was right in saying that in Antwerp the dowry was at one point considered a superpriority, but this was only during the period 1523-1530. Yet, in spite of this, Le Marchand’s analysis as pointing to collateral rights as crucial features of municipal legal constellations can be taken on as an invitation to analyse collateral rights and priority of debts as a fundamental part of the political economy of late-medieval and early modern cities of trade. For that purpose, the perspective must be broad, with an eye on the interactions between di"erent arrangements and proceedings.
Properties of the double beta model for intracluster gas
Creators: name: Xue, Yan-Jie
name: Wu, Xiang-Ping
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present an extensive study of the double beta model for the X-ray surface brightness profiles of clusters, and derive analytically the gas density and total masses of clusters under the hydrostatic equilibrium hypothesis. It is shown that the employment of the double beta model instead of the conventional single beta model can significantly improve the goodness of fit to the observed X-ray surface brightness profiles of clusters, which will in turn lead to a better determination of the gas and total mass distributions in clusters. In particular, the observationally fitted beta parameter for the extended component in a double beta model may become larger. This opens a new possibility of resolving the long-standing beta discrepancy for clusters. Using an ensemble of 33 ROSAT PSPC observed clusters drawn from the Mohr, Mathiesen & Evrard (1999) sample, we find that the asymptotic value of beta_{fit} is (0.83+-0.33) at large radii, consistent with both the average spectroscopic parameter beta_{spec}=(0.78+-0.37) and the result given by numerical simulations.
description: 9 pages, 6 figures, accepted for publication in MNRAS
title: Airport security workforce planning
Creators: name: Wiesflecker, Johanna
Publisher: name: The University of Edinburgh
Year: 2025
Subjects: subject: Passenger Demand
subject: Roster Planning
subject: Mixed Integer Programming
subject: Simheuristic
subject: Airport Bottlenecks

description: Uncontrollable passenger arrivals cause frequent situations where passenger demands exceed the available capacity. This becomes particularly apparent within the airport’s bottlenecks — such as the security hall — where long queues can build up, leading to delays, which translates to unhappy passengers and airlines. Planning for and quickly adapting to changes in passenger arrivals to the security hall and staff availability is key to keeping a consistent flow of passengers and avoiding a build-up of queues. This problem can be addressed at different stages in the roster planning timeline. At the strategic planning stage, the chief staff scheduler (CSS) and HR department can change contracts and adapt the workforce structure (e.g. via recruitment) best to suit the expected demand for the upcoming season. At the tactical planning stage, the problem is two-fold. On the one hand, a fast and flexible roster tool is needed to adapt quickly to changing work regulations and union demands. On the other hand, this is the last time the CSS can freely allocate workforce members to the schedule. Hence, they need to use this chance to build flexibilities into the roster that can help adapt to changes in demand at the subsequent operational planning stage. A solver-independent modelling approach using Mixed Integer Programming and Constraint Programming is proposed as a fast and flexible Roster Tool to support the CSS’s decisions and help with union discussions. Based on this tool, a Simheuristic is derived to allocate flexibility to the roster at the tactical planning stage. The Simheuristic combines a metaheuristic (Simulated Annealing, Genetic Algorithm and Adaptive Large Neighborhood Search (ALNS)) to adjust the flexibility metrics in the roster with Monte-Carlo Simulation of demand patterns and staff absences that need to be addressed. The proposed Simheuristic for tuning flexibility metrics is the first of its kind in rostering literature. It shows significantly better results than simply adjusting the aggregation of the demand forecast into a model week. Furthermore, a Simheuristic consisting of ALNS to adjust the contracts and Monte-Carlo Simulation to test the feasibility of the resulting rosters is proposed to address the strategic planning problem of finding the best contractual combination for the next season. The experiments suggest that different demand patterns require different workforce structures, which implies that the airport should revisit its contracts every season to best address expected changes in passenger demands. Finally, a case study of Edinburgh Airport’s security staff scheduling problem and the development of a suitable rostering approach is presented.
Labor Strife in Public Schools: Does it Affect Education Production?
Creators: name: Turner, Abigail
Publisher: name: Carnegie Mellon University
Year: 2008
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: Last school year, teachers or employees from fourteen Pennsylvania public school districts went on strike. In Pennsylvania, as in eight other states, strikes are a legal and regulated part of collective bargaining, a process in which, every few years, teachers’ unions and local school boards meet to agree upon pay, benefits, and working conditions. Theory and empirical evidence from manufacturing (Kleiner, Leonard & Pilarski [1999]; Mas [2007]; Krueger & Mas [2003]) and the service sector (Mas [2006]) tell us that labor strife causes a decrease in employee productivity, but there have been no studies exploring whether the relationship between labor strife and teacher productivity can be measured empirically. The contribution of this paper to the literature is to document whether the same relationship that exists in firms, between production and labor strife, exists in public schools, between education production and teachers’ labor disputes.
Spontaneously Broken Spacetime Symmetries and the Role of Inessential Goldstones
Creators: name: Klein, Remko
name: Roest, Diederik
name: Stefanyszyn, David
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In contrast to internal symmetries, there is no general proof that the coset construction for spontaneously broken spacetime symmetries leads to universal dynamics. One key difference lies in the role of Goldstone bosons, which for spacetime symmetries includes a subset which are inessential for the non-linear realisation and hence can be eliminated. In this paper we address two important issues that arise when eliminating inessential Goldstones. The first concerns the elimination itself, which is often performed by imposing so-called inverse Higgs constraints. Contrary to claims in the literature, there are a series of conditions on the structure constants which must be satisfied to employ the inverse Higgs phenomenon, and we discuss which parametrisation of the coset element is the most effective in this regard. We also consider generalisations of the standard inverse Higgs constraints, which can include integrating out inessential Goldstones at low energies, and prove that under certain assumptions these give rise to identical effective field theories for the essential Goldstones. Secondly, we consider mappings between non-linear realisations that differ both in the coset element and the algebra basis. While these can always be related to each other by a point transformation, remarkably, the inverse Higgs constraints are not necessarily mapped onto each other under this transformation. We discuss the physical implications of this non-mapping, with a particular emphasis on the coset space corresponding to the spontaneous breaking of the Anti-De Sitter isometries by a Minkowski probe brane.
Additional file 3 of Integrative taxonomy on the rare sky-island Ligidium species from southwest China (Isopoda, Oniscidea, Ligiidae)
Creators: name: Wang, Jin
name: Yang, Jingbo
name: Zeng, Xuegang
name: Li, Weichun
Publisher: name: figshare
Year: 2022
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Environmental Sciences not elsewhere classified
subject: Ecology
subject: Biological Sciences not elsewhere classified
subject: Marine Biology
subject: Plant Biology

description: Additional file 3. Supplementary figures of maximum likelihood treesbased on two mitochondrial genes (COI and 12S), three nuclear genes (18S, 28Sand NAK) and a concatenated dataset of five loci (COI, 12S, 18S, 28S and NAK).
Nuclear Matter with a Bose Condensate of Dibaryons in Relativistic Mean-Field Theory
Creators: name: Faessler, Amand
name: Buchmann, A. J.
name: Krivoruchenko, M. I.
name: Martemyanov, B. V.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: If sufficiently light dibaryon resonances exist, a Bose condensate of dibaryons can occur in nuclear matter before the quark-hadron phase transition. Within a relativistic mean-field model we show that heterophase nuclear-dibaryon matter is for a wide set of parameters energetically more favorable than normal nuclear matter. Production of dibaryons is, however, relatively suppressed as compared to estimates based on the model of non-interacting nucleons and dibaryons.
description: Talk given at the XIII International Seminar on High Energy Physics Problems (Relativistic Nuclear Physics and Quantum Chromodynamics), Dubna, 2-7 September, 1996. 9 pages, 3 figures
Integer Quantum Hall Effect in Graphite
Creators: name: Kempa, H.
name: Esquinazi, P.
name: Kopelevich, Y.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present Hall effect measurements on highly oriented pyrolytic graphite that indicate the occurrence of the integer quantum-Hall-effect. The evidence is given by the observation of regular plateau-like structures in the field dependence of the transverse conductivity obtained in van der Pauw configuration. Measurements with the Corbino-disk configuration support this result and indicate that the quasi-linear and non-saturating longitudinal magnetoresistance in graphite is governed by the Hall effect in agreement with a recent theoretical model for disordered semiconductors.
description: 3 figures, to be published in Solid State Communication (2006)
Enhanced bacterial swimming speeds in macromolecular polymer solutions
Creators: name: Zöttl, Andreas
name: Yeomans, Julia M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The locomotion of swimming bacteria in simple Newtonian fluids can successfully be described within the framework of low Reynolds number hydrodynamics. The presence of polymers in biofluids generally increases the viscosity, which is expected to lead to slower swimming for a constant bacterial motor torque. Surprisingly, however, several experiments have shown that bacterial speeds increase in polymeric fluids, and there is no clear understanding why. Therefore we perform extensive coarse-grained simulations of a bacterium swimming in explicitly modeled solutions of macromolecular polymers of different lengths and densities. We observe an increase of up to 60% in swimming speed with polymer density and demonstrate that this is due to a depletion of polymers in the vicinity of the bacterium leading to an effective slip. However this in itself cannot predict the large increase in swimming velocity: coupling to the chirality of the bacterial flagellum is also necessary.
description: 8 pages + 9 figures
Themara hirtipes Rondani 1875
Creators: name: Sforzi, Alessandra
name: Sommaggio, Daniele
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Lauxaniidae
Themara
Themara hirtipes

description: Themara hirtipes Rondani, 1875
ORIGINAL DESCRIPTION: 1875c: 435.
 TYPE LOCALITY: “ Insula Bonae Fortunae (Borneo), Provincia Sarawak [Bona Fortuna Island, Sarawak Province, Borneo]” (Rondani 1875c: 421).
 TYPE MATERIAL: 1 ♂, lectotype (MSNG): Borneo, Sarawak, 1865/1866, Coll. Doria / typus / hirtipes Rond. / Themara hirtipes n° 27.
 PARALECTOTYPES NOT EXAMINED: 2 ♂♂ (one covered with mould) (MZUF: Box 72): Acydia hirtipes n., Borneo / Borneo, Sarawak, 1865–66, Coll. G. Doria / [no identification number].
 CURRENT STATUS: valid species (Hardy 1977: 69, Norrbom et al. 1999: 225).
 REMARKS: Rondani (1875c: 435) described Themara hirtipes from just the male sex, without specifying the exact number of specimens and giving a range of lengths, from material collected by G. Doria and O. Beccari. Guiglia (1957: 197) reported a “ holotype ” in the MSNG without knowing of two males in the MZUF, which brings the original syntype series to three specimens. In his original description Rondani did not explicitly refer to a single specimen therefore Guiglia’s “ holotype ” specimen must be considered as the lectotype (I.C.Z.N. 1999: Article 74.6). The additional two males in the MZUF not examined by Guiglia are paralectotypes.
description: Published as part of Sforzi, Alessandra & Sommaggio, Daniele, 2021, Catalog of the Diptera types described by Camillo Rondani, pp. 1-438 in Zootaxa 4989 (1) on page 377, DOI: 10.11646/zootaxa.4989.1.1, http://zenodo.org/record/4980621
Flavour from partially resolved singularities
Creators: name: Bonelli, G.
name: Bonora, L.
name: Ricco, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this letter we study topological open string field theory on D--branes in a IIB background given by non compact CY geometries ${\cal O}(n)\oplus{\cal O}(-2-n)$ on $\P1$ with a singular point at which an extra fiber sits. We wrap $N$ D5-branes on $\P1$ and $M$ effective D3-branes at singular points, which are actually D5--branes wrapped on a shrinking cycle. We calculate the holomorphic Chern-Simons partition function for the above models in a deformed complex structure and find that it reduces to multi--matrix models with flavour. These are the matrix models whose resolvents have been shown to satisfy the generalized Konishi anomaly equations with flavour. In the $n=0$ case, corresponding to a partial resolution of the $A_2$ singularity, the quantum superpotential in the ${\cal N}=1$ unitary SYM with one adjoint and $M$ fundamentals is obtained. The $n=1$ case is also studied and shown to give rise to two--matrix models which for a particular set of couplings can be exactly solved. We explicitly show how to solve such a class of models by a quantum equation of motion technique.
A New Look into the Partial Wave Decomposition of Three-Nucleon Forces
Creators: name: Hüber, D.
name: Witała, H.
name: Nogga, A.
name: Glöckle, W.
name: Kamada, H.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We demonstrate that the partial wave decomposition of three-nucleon forces used up to now in momentum space has to be necessarily unstable at high partial waves. This does not affect the applications performed up to now, which were restricted to low partial waves. We present a new way to perform the partial wave decomposition which is free of that defect. This is exemplified for the most often used $2π$-exchange Tuscon-Melbourne three-nucleon force. For the lower partial waves the results of the old method are reproduced.
description: 38 pages in REVTeX, 4 figures in PiCTeX
Labor Market Discrimination
Creators: name: McElroy, Susan Williams
name: Darity, William A.
Publisher: name: Carnegie Mellon University
Year: 1999
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences
subject: 160510 Public Policy
subject: FOS: Political science

description: Two central and related questions in economics concern how resources are distributed and why some persons earn more than others. In the labor market, where the buyers are employers and the sellers are workers, exchange occurs when workers "sell" their labor to employers and receive wages or salary in return for the services that they perform. In the United States, economic status varies remarkably along race and gender lines. This paper describes racial differences in three distinct but related dimensions of economic status: earnings, employment status, and wealth. Finally, this paper reviews some explanations economists have offered for these differences and consider the evidence available to support or refute these explanations.
Linear dynamics of the solar convection zone: excitation of waves in unstably stratified shear flows
Creators: name: Chagelishvili, G. D.
name: Tevzadze, A. G.
name: Goossens, M.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In this paper we report on the nonresonant conversion of convectively unstable linear gravity modes into acoustic oscillation modes in shear flows. The convectively unstable linear gravity modes can excite acoustic modes with similar wave-numbers. The frequencies of the excited oscillations may be qualitatively higher than the temporal variation scales of the source flow, while the frequency spectra of the generated oscillations should be intrinsically correlated to the velocity field of the source flow. We anticipate that this nonresonant phenomenon can significantly contribute to the production of sound waves in the solar convection zone.
description: 8 pages. To appear in the proceedings of the conference "Waves in Dusty, Solar and Space Plasmas", Leuven, Belgium 21-26 May 2000
Nodal-antinodal dichotomy and magic doping fractions in a stripe ordered antiferromagnet
Creators: name: Granath, Mats
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a model of a stripe ordered doped antiferromagnet consisting of coupled Hubbard ladders which can be tuned from quasi-one-dimensional to two-dimensional. We solve for the magnetization and charge density on the ladders by Hartree-Fock theory and find a set of solutions with lightly doped ``spin-stripes'' which are antiferromagnetic and more heavily doped anti-phase ``charge-stripes''. Both the spin- and charge-stripes have electronic spectral weight near the Fermi energy but in different regions of the Brillouin zone; the spin-stripes in the ``nodal'' region, near (π/2,π/2), and the charge-stripes in the ``antinodal'' region, near (π,0). We find a striking dichotomy between nodal and antinodal states in which the nodal states are essentially delocalized and two-dimensional whereas the antinodal states are quasi-one-dimensional, localized on individual charge-stripes. For bond-centered stripes we also find an even-odd effect of the charge periodicity which could explain the non-monotonous variations with doping of the low-temperature resistivity in LSCO
description: 6 pages, 6 figures, Expanded and improved, with additional references
INNOVATSION YONDASHUVLAR ASOSIDA TALABALARNING KOMMUNIKATIV KOMPETENTLIGINI RIVOJLANTIRISH METODIKASI
Creators: name: Musaeva, Amina
Publisher: name: Zenodo
Year: 2024

description: Ushbu maqolada innovatsion yondashuvlar asosida talabalarning kommunikativ kompetentsiyasini rivojlantirishning dolzarbligi, shaxs kamolotida kommunikativlikning ahamiyati, kommunikativ kompetentsiyaning nazariy asoslari, zamonaviy o‘qituvchiga qo‘yilgan talablar, ta’lim jarayonida samarali usullarni qo‘llash orqali kommunikativ qobiliyatlarni rivojlantirishga erishishni ta’minlash, yondashuvlarga asoslangan holda samarali metodikalarni ishlab chiqish va joriy etish, talaba bilan do‘stona munosabatlarga asoslangan innovatsion ta’lim muhitini yaratib, kommunikativlikni oshirishning yangi strategiyalarini izlab topishga oid ma’lumotlar va tavsiyalar berilgan.
The Delta-Delta Intermediate State in 1S0 Nucleon-Nucleon Scattering From Effective Field Theory
Creators: name: Savage, Martin J.
Publisher: name: arXiv
Year: 1996
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We examine the role of the Delta-Delta intermediate state in low energy NN scattering using effective field theory. Theories both with and without pions are discussed. They are regulated with dimensional regularization and MSbar subtraction. We find that the leading effects of the Delta-Delta state can be absorbed by a redefinition of the contact terms in a theory with nucleons only. It does not remove the requirement of a higher dimension operator to reproduce data out to moderate momentum. The explicit decoupling of the Delta-Delta state is shown for the theory without pions.
description: 16 pages, 3 figures, uses harvmac
FieldSAFE: Dataset for Obstacle Detection in Agriculture
Creators: name: Kragh, Mikkel Fly
name: Christiansen, Peter
name: Laursen, Morten Stigaard
name: Larsen, Morten
name: Steen, Kim Arild
name: Green, Ole
name: Karstoft, Henrik
name: Jørgensen, Rasmus Nyholm
Publisher: name: arXiv
Year: 2017
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper, we present a novel multi-modal dataset for obstacle detection in agriculture. The dataset comprises approximately 2 hours of raw sensor data from a tractor-mounted sensor system in a grass mowing scenario in Denmark, October 2016. Sensing modalities include stereo camera, thermal camera, web camera, 360-degree camera, lidar, and radar, while precise localization is available from fused IMU and GNSS. Both static and moving obstacles are present including humans, mannequin dolls, rocks, barrels, buildings, vehicles, and vegetation. All obstacles have ground truth object labels and geographic coordinates.
description: Submitted to special issue of MDPI Sensors: Sensors in Agriculture
Possible Discrimination between Gamma Rays and Hadrons using Cerenkov Photon Timing Measurements
Creators: name: Chitnis, V. R.
name: Bhat, P. N.
Publisher: name: arXiv
Year: 2000
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Atmospheric Čerenkov Technique is an established methodology to study $TeV$ energy gamma rays. However the challenging problem has always been the poor signal to noise ratio due to the presence of abundant cosmic rays. Several ingenious techniques have been employed to alleviate this problem, most of which are centred around the Čerenkov image characteristics. However there are not many techniques available for improving the signal to noise ratio of the data from wavefront sampling observations. One such possible technique is to use the Čerenkov photon arrival times and identify the species dependent characteristics in them. Here we carry out systematic monte carlo simulation studies of the timing information of Čerenkov photons at the observation level. We have parameterized the shape of the Čerenkov shower front as well as the pulse shapes in terms of experimentally measurable quantities. We demonstrate the sensitivity of the curvature of the shower front, pulse shape parameters as well as the photon arrival time jitter to primary species and show their efficiency in improving the signal to noise ratio. The effect of limiting the Čerenkov telescope opening angle by using a circular focal point mask, onthe efficacy of the parameters has also been studied for each of the parameters. Radius of the shower front, pulse decay time and photon arrival time jitter have been found to be the most promising parameters which could be used to discriminate $γ-$ray events from the background. We also find that the efficiency of the first two parameters increases with zenith angle and efficiency of pulse decay time decreases with increasing altitude of observation.
description: 30 pages, 5 postscript figures, uses elsart.sty; To appear in Astroparticle Physics
On the AdS Higher Spin / O(N) Vector Model Correspondence: degeneracy of the holographic image
Creators: name: Diaz, Danilo E.
name: Dorn, Harald
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the conjectured duality between the critical O(N) vector model and minimal bosonic massless higher spin (HS) theory in AdS. In the boundary free theory, the conformal partial wave expansion (CPWE) of the four-point function of the scalar singlet bilinear is reorganized to make it explicitly crossing-symmetric and closed in the singlet sector, dual to the bulk HS gauge fields. We are able to analytically establish the factorized form of the fusion coefficients as well as the two-point function coefficient of the HS currents. We insist in directly computing the free correlators from bulk graphs with the unconventional branch. The three-point function of the scalar bilinear turns out to be an "extremal" one at d=3. The four-leg bulk exchange graph can be precisely related to the CPWs of the boundary dual scalar and its shadow. The flow in the IR by Legendre transforming at leading 1/N, following the pattern of double-trace deformations, and the assumption of degeneracy of the hologram lead to the CPWE of the scalar four-point function at IR. Here we confirm some previous results, obtained from more involved computations of skeleton graphs, as well as extend some of them from d=3 to generic dimension 2
description: 22 pages, 5 figures
Vers une modélisation des pratiques d'accès à l'information. [Rapport de recherche]
Creators: name: Thivant, eric
Publisher: name: Zenodo
Year: 2001

description: This study concerns information seeking and use models for professionals and their evolutions essentially, i.e. Information Access Practices. Coming from Anglo-Saxon literature, this new research trend evolves with the development of information science paradigms. So different information seeking and use models emerge in order to explain how professionals seek information and what can be done in order to help them. Two main categories can be distinguished: information seeking and use models versus the information retrieval models. So we will present today these models' diversity and we will evaluate them in order to see if a convergence is possible with the same vocabulary and procedures.
Hierarchical Memory System with Weighting for Lifelong Learning
Creators: name: Nguyen, Phi Son
name: Ng, Mers
Publisher: name: Zenodo
Year: 2025

description: We propose a Hierarchical Weighted Memory (HWM) architecture for continual (lifelong) learning that organizes experience across multiple abstraction layers. Inspired by cognitive and neuroscientific principles, HWM aligns with the “Epistemological Building Blocks” framework (Existence → Change → Abstraction → Meta-Abstraction) by dedicating separate memory modules to raw instances, temporal dynamics, conceptual categories, and higher-order rules. Each memory entry carries an importance weight that guides consolidation, replay, and retrieval, thereby prioritizing salient knowledge and mitigating catastrophic forgetting. Our design integrates mechanisms from complementary learning systems and memory-augmented networks: for example, fast episodic memory feeds slower semantic memory (as in Parisi et al., 2018), and parameter-importance weighting (as in EWC and Synaptic Intelligence) governs plasticity. We describe concrete implementation options (e.g. dynamic key-value stores, recurrent transformers) and propose experiments on continual-classification and sequential-reasoning benchmarks. We expect HWM to enable richer knowledge retention and abstraction (beyond what single-layer replay or regularization can achieve), while discussing trade-offs and alternatives such as dual-memory or rehearsal approaches
Fluctuations, correlations and the nonextensivity
Creators: name: Wilk, G.
name: Wlodarczyk, Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Examples of joint probability distributions are studied in terms of Tsallis' nonextensive statistics both for correlated and uncorrelated variables, in particular it is explicitely shown how correlations in the system can make Tsallis entropy additive and that the effective nonextensivity parameter $q_N$ decreases towards unity when the number of variables $N$ increases. We demonstrate that Tsallis distribution of energies of particles in a system leads in natural way to the Negative Binomial multiplicity distribution in this system.
description: Some misprints corrected, ro pbe published in Physica A