cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Distributionally robust stochastic programs with side information based on trimmings -- Extended version
Creators: name: Esteban-Pérez, Adrián
name: Morales, Juan M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 90C15 Stochastic programming and 90C47 Minimax problems

description: We consider stochastic programs conditional on some covariate information, where the only knowledge of the possible relationship between the uncertain parameters and the covariates is reduced to a finite data sample of their joint distribution. By exploiting the close link between the notion of trimmings of a probability measure and the partial mass transportation problem, we construct a data-driven Distributionally Robust Optimization (DRO) framework to hedge the decision against the intrinsic error in the process of inferring conditional information from limited joint data. We show that our approach is computationally as tractable as the standard (without side information) Wasserstein-metric-based DRO and enjoys performance guarantees. Furthermore, our DRO framework can be conveniently used to address data-driven decision-making problems under contaminated samples and naturally produces distributionally robust versions of some local nonparametric predictive methods, such as Nadaraya-Watson kernel regression and $K$-nearest neighbors, which are often used in the context of conditional stochastic optimization. Finally, the theoretical results are illustrated using a single-item newsvendor problem and a portfolio allocation problem with side information.
description: 24 figures, 76 pages
Anastrophyllum aristatum A. E. D. Daniels, D. G. Long, Kariyappa et P. Daniel, J. Bryol.
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Anastrophyllaceae
Anastrophyllum
Anastrophyllum aristatum

description: Anastrophyllum aristatum (Herzog ex N.Kitag.) A.E.D.Daniels, D.G.Long, Kariyappa et P.Daniel,
J. Bryol. 34: 148,
2012 (see Daniels et al. 2012). BASIONYM: Anastrophyllum bidens var. aristatum Herzog ex N.Kitag., J. Hattori Bot. Lab. 33: 216, 1970 (see Kitagawa 1970).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on pages 62-63, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
autoTICI: Automatic Brain Tissue Reperfusion Scoring on 2D DSA Images of Acute Ischemic Stroke Patients
Creators: name: Su, Ruisheng
name: Cornelissen, Sandra A. P.
name: van der Sluijs, Matthijs
name: van Es, Adriaan C. G. M.
name: van Zwam, Wim H.
name: Dippel, Diederik W. J.
name: Lycklama, Geert
name: van Doormaal, Pieter Jan
name: Niessen, Wiro J.
name: van der Lugt, Aad
name: van Walsum, Theo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The Thrombolysis in Cerebral Infarction (TICI) score is an important metric for reperfusion therapy assessment in acute ischemic stroke. It is commonly used as a technical outcome measure after endovascular treatment (EVT). Existing TICI scores are defined in coarse ordinal grades based on visual inspection, leading to inter- and intra-observer variation. In this work, we present autoTICI, an automatic and quantitative TICI scoring method. First, each digital subtraction angiography (DSA) acquisition is separated into four phases (non-contrast, arterial, parenchymal and venous phase) using a multi-path convolutional neural network (CNN), which exploits spatio-temporal features. The network also incorporates sequence level label dependencies in the form of a state-transition matrix. Next, a minimum intensity map (MINIP) is computed using the motion corrected arterial and parenchymal frames. On the MINIP image, vessel, perfusion and background pixels are segmented. Finally, we quantify the autoTICI score as the ratio of reperfused pixels after EVT. On a routinely acquired multi-center dataset, the proposed autoTICI shows good correlation with the extended TICI (eTICI) reference with an average area under the curve (AUC) score of 0.81. The AUC score is 0.90 with respect to the dichotomized eTICI. In terms of clinical outcome prediction, we demonstrate that autoTICI is overall comparable to eTICI.
description: Accepted for publication in IEEE Transactions on Medical Imaging (IEEE TMI)
The Hydraulic Jump in Liquid Helium
Creators: name: Rolley, Etienne
name: Guthmann, Claude
name: Pettersen, Michael S.
name: Chevallier, Christophe
Publisher: name: arXiv
Year: 2005
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We present the results of some experiments on the circular hydraulic jump in normal and superfluid liquid helium. The radius of the jump and the depth of the liquid outside the jump are measured through optical means. Although the scale of the apparatus is rather small, the location of the jump is found to be consistent with the assumption that the jump can be treated as a shock, if the surface tension is taken into account. The radius of the jump does not change when going down in temperature through the lambda point; we think that the flow is supercritical. A remarkable feature of the experiment is the observation of stationary ripples within the jump when the liquid is superfluid.
description: Submitted to the proceedings of the 24th International Conference on Low Temperature Physics. 2 figures
Aponardia Váňa
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Marchantiophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Aponardia

description: Aponardia (R.M.Schust.) Váňa,
Phytotaxa 65: 46, 2012 (see Váňa et al. 2012d). BASIONYM: Nardia subgen. Aponardia R.M.Schust., Beih. Nova Hedwigia 119: 360, 2002 (see Schuster 2002).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 63, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Simulations of thermally broadened HI Lya absorption arising in the warm-hot intergalactic medium
Creators: name: Richter, P.
name: Fang, T.
name: Bryan, G. L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Recent far-ultraviolet (FUV) absorption line measurements of low-redshift quasars have unveiled a population of intervening broad HI Lya absorbers (BLAs) with large Doppler parameters (b> 40 km/s). If the large width of these lines is dominated by thermal line broadening, the BLAs may trace highly-ionized gas in the warm-hot intergalactic medium (WHIM) in the temperature range T ~ 10^5-10^6 K, a gas phase that is expected to contain a large fraction of the baryons at low redshift. In this paper we use a hydrodynamical simulation to study frequency, distribution, physical conditions, and baryon content of the BLAs at z=0. From our simulated spectra we derive a number of BLAs per unit redshift of (dN/dz)_BLA ~ 38 for HI absorbers with log (N(cm^-2)/b(km/s))>10.7, b>40 km/s, and log N(HII)<20.5. The baryon content of these systems is Omega_b(BLA)=0.0121/h_65, which represents ~25 percent of the total baryon budget in our simulation. Our results thus support the idea that BLAs represent a significant baryon reservoir at low redshift. BLAs predominantly trace shock-heated collisionally ionized WHIM gas at temperatures log T~4.4-6.2. About 27 percent of the BLAs in our simulation originate in the photoionized Lya forest (log T<4.3) and their large line widths are determined by non-thermal broadening effects such as unresolved velocity structure and macroscopic turbulence. Our simulation implies that for a large-enough sample of BLAs in FUV spectra it is possible to obtain a reasonable approximation of the baryon content of these systems solely from the measured HI column densities and b values.
description: 11 pages, 8 figures; minor modifications; accepted for publication in A&A
Nardia huerlimannii Vana, Phytotaxa
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Jungermanniales
Solenostomataceae
Nardia
Nardia huerlimannii

description: Aponardia huerlimannii (Váňa et Grolle) Váňa,
Phytotaxa 65: 46, 2012 (see Váňa et al. 2012d). BASIONYM: Nardia huerlimannii Váňa et Grolle, Österr. Bot. Z. 118 (3): 233, 1970 (see Váňa 1970).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 63, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Observation of polarization quantum noise of laser radiation in Rb vapor cell
Creators: name: Zibrov, Alexander S.
name: Novikova, Irina
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present experimental study of polarization quantum noise of laser radiation passed through optically think vapor of Rb87. We observe a step-like noise spectrum. We discuss various factor which may result in such noise spectrum and prevent observation of squeezing of quantum fluctuations predicted in Matsko et al. PRA 63, 043814 (2001).
description: 4 pages, 5 figures. Translated from Russian by I. Novikova
A case study of Generative AI in MSX Sales Copilot: Improving seller productivity with a real-time question-answering system for content recommendation
Creators: name: Singh, Manpreet
name: Pasricha, Ravdeep
name: Singh, Nitish
name: Kondapalli, Ravi Prasad
name: R, Manoj
name: R, Kiran
name: Boué, Laurent
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: In this paper, we design a real-time question-answering system specifically targeted for helping sellers get relevant material/documentation they can share live with their customers or refer to during a call. Taking the Seismic content repository as a relatively large scale example of a diverse dataset of sales material, we demonstrate how LLM embeddings of sellers' queries can be matched with the relevant content. We achieve this by engineering prompts in an elaborate fashion that makes use of the rich set of meta-features available for documents and sellers. Using a bi-encoder with cross-encoder re-ranker architecture, we show how the solution returns the most relevant content recommendations in just a few seconds even for large datasets. Our recommender system is deployed as an AML endpoint for real-time inferencing and has been integrated into a Copilot interface that is now deployed in the production version of the Dynamics CRM, known as MSX, used daily by Microsoft sellers.
Deep learning for mass transport in porous media
Creators: name: Matyka, Maciej
name: Graczyk, Krzysztof
name: Strzelczyk, Dawid
Publisher: name: Zenodo
Year: 2024

description: We discuss the convolutional neural networks(CNNs) to predict the basic properties of transportthrough porous media. Two types of transport are considered- fluid flow and diffusion. We use the Lattice-Boltzmann method (LBM) to get numerical data for networktraining; namely, we obtain the fluid flow velocityfields and gas concentration maps at the pore-scale. Westudy how CNNs are effective in predicting macroscopicparameters, such as permeability, porosity, and tortuositybased only on information about the geometry of thesamples. Eventually, we adapt U-Net architecture tostudy the capability of CNNs to predict complex spatialconcentration maps in diffusion phenomena.
Quality of life and associated factors of lymphoma patients in Hematology Clinic at King Chulalongkorn Memorial Hospital
Creators: name: Tanyares Sathaporn
name: Chotiman Chinvararak
name: Udomsak Bunworasate
Publisher: name: Faculty of Medicine Chulalongkorn University
Year: 2021
Subjects: Quality of life
lymphoma
depression
anxiety

description: Chulalongkorn Medical Bulletin, 3, 1, 011-021
Antivortices due to competing orbital and paramagnetic pair-breaking effects
Creators: name: Klein, U.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Thermodynamically stable vortex-antivortex structures in a quasi-two-dimensional superconductor in a tilted magnetic field are predicted. For this geometry, both orbital and spin pair-breaking effects exist, with their relative strength depending on the tilt angle Θ. The spectrum of possible states contains as limits the ordinary vortex state (for large Θ) and the Fulde-Ferrell-Larkin-Ovchinnikov state (for Θ=0). The quasiclassical equations are solved near H_{c2} for arbitrary Θand it is shown that stable states with coexisting vortices and antivortices exist in a small interval close to Θ=0. The results are compared with recent predictions of antivortices in mesoscopic samples.
description: 11 pages, 3 figures
THE MEASUREMENT OF BIASED TECHNICAL CHANGE IN THE MANY FACTORS CASE: U.S. AND JAPANESE AGRICULTURE
Creators: name: Binswanger, Hans P.
name: Binswanger, Hans P.
Publisher: name: Unknown
Year: 1972
Subjects: Research and Development/Tech Change/Emerging Technologies

description: This paper presents a way to measure factor saving biases of technical change, or more generally, of efficiency gains with more than two factors of production. The methodology is then applied to the agricultural sectors of the U.S. (1912-1968) and Japan (1893-1962).
Sequential Linearization Method for Bound-Constrained Mathematical Programs with Complementarity Constraints
Creators: name: Kirches, Christian
name: Larson, Jeffrey
name: Leyffer, Sven
name: Manns, Paul
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: We propose an algorithm for solving bound-constrained mathematical programs with complementarity constraints on the variables. Each iteration of the algorithm involves solving a linear program with complementarity constraints in order to obtain an estimate of the active set. The algorithm enforces descent on the objective function to promote global convergence to B-stationary points. We provide a convergence analysis and preliminary numerical results on a range of test problems. We also study the effect of fixing the active constraints in a bound-constrained quadratic program that can be solved on each iteration in order to obtain fast convergence.
description: 33 pages
Recent advances of Beyond the Standard model cosmology
Creators: name: Khlopov, Maxim
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: BSM physics, underlying the now standard inflationary cosmology with baryosynthesis and dark matter/energy, inevitably leads to features, going beyond this standard cosmological paradigm. The signatures of these features can be considered in the hints for the existence of antihelium component of cosmic rays and massive Primordial Black Holes (PBH), in the discovery of stochastic gravitational wave background (SGWB) and evidence for early galaxy formation as well as in the dark atom solution for the puzzles of direct dark mater searches. We discuss open problems of physics of dark atoms, which can explain positive result of DAMA/NaI and DAMA/LIBRA direct searches for dark matter, of the origin and evolution of antimatter domains in baryon asymmetrical Universe, of the Axion Like Particle (ALP) physics, which may explain the origin of SGWB, discovered by Pulsar Timing Array (PTA) facilities and early galaxy formation, favored by James Webb Space Telescope.
description: Prepared for Proceedings of XXVI Bled Workshop "What comes beyond the Standard models?"
Joint Online Parameter Estimation and Optimal Sensor Placement for the Partially Observed Stochastic Advection-Diffusion Equation
Creators: name: Sharrock, Louis
name: Kantas, Nikolas
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: Computation (stat.CO)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: In this paper, we consider the problem of jointly performing online parameter estimation and optimal sensor placement for a partially observed infinite dimensional linear diffusion process. We present a novel solution to this problem in the form of a continuous-time, two-timescale stochastic gradient descent algorithm, which recursively seeks to maximise the log-likelihood with respect to the unknown model parameters, and to minimise the expected mean squared error of the hidden state estimate with respect to the sensor locations. We also provide extensive numerical results illustrating the performance of the proposed approach in the case that the hidden signal is governed by the two-dimensional stochastic advection-diffusion equation.
Effects of marriage and children on financial risk tolerance : a synthesis of family development and prospect theory
Creators: name: Chaulk, Barbara Jeanne
Publisher: name: University of British Columbia
Year: 2009

description: Research has attempted to explain perceptions of financial risk using demographic variables as predictors. This study differed by using family stages to predict an individual's tolerance toward financial decisions that have uncertain outcomes. Within a Family Development Theory and Prospect Theory framework, a novel approach, this study attempted to explain variability in financial risk tolerance for distinct family stages. In addition, gender, age and income were expected to moderate the main effects of marital status and children. Data were collected from respondents (n = 76) who lived in a university housing community and who volunteered to participate in the 1999 Family and Couples Relationship Survey. Two dependent variables, employment risk and investment risk, were analyzed using two parallel multi-stage Ordinary Least Squares Regression procedures. Results supported the theoretical model in the following ways: children have a direct effect on investment risk tolerance, age moderates marital status for employment risk tolerance, and income moderates the effect of children on employment risk tolerance. Moreover, respondents considered employment and investment risk as separate constructs. Findings were seldom consistent across the two dependent variables. A n age x gender effect requires further investigation. Future research should test the theoretical model with a larger and more varied sample. Findings indicate that financial planners and educators may increase their understanding of financial behaviors within families by going beyond demographic data. This study indicates that interactions of demographic variables and family stages have the potential to explain financial risk tolerance beyond what is currently known in the literature.
Appearance of room temperature ferromagnetism in Cu-doped TiO$_{2-δ}$ films
Creators: name: Duhalde, S.
name: Vignolo, M. F.
name: Chiliotte, C.
name: Torres, C. E. Rodríguez
name: Errico, L. A.
name: Cabrera, A. F.
name: Rentería, M.
name: Sánchez, F. H.
name: Weissmann, M.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In recent years there has been an intense search for room temperature ferromagnetism in doped dilute semiconductors, which have many potentially applications in spintronics and optoelectronics. We report here the unexpected observation of significant room temperature ferromagnetism in a semiconductor doped with nonmagnetic impurities, Cu-doped TiO$_2$ thin films grown by Pulsed Laser Deposition. The magnetic moment, calculated from the magnetization curves, resulted surprisingly large, about 1.5 $μ_B$ per Cu atom. A large magnetic moment was also obtained from ab initio calculations using the supercell method for TiO$_2$ with Cu impurities, but only if an oxygen vacancy in the nearest-neighbour shell of Cu was present. This result suggests that the role of oxygen vacancies is crucial for the appearance of ferromagnetism. The calculations also predict that Cu doping favours the formation of oxygen vacancies.
description: 4 pages, 3 figures, published in Phys. Rev. B (Rapid Comm.)
[Brev til DKNVS]
Creators: name: Falch, Melchior
name: Det Kongelige Norske Videnskabers Selskab (DKNVS)
Publisher: name: Unknown
Year: 1778

description: Oversender avhandlinger
description: 2 brev. Polydoc nr. 1: 800. Polydoc nr. 2: 185.
ESTIMATING THE PROFITABILITY OF POOL COOPERATIVES
Creators: name: Lerman, Zvi
name: Parliament, Claudia
name: Lerman, Zvi
name: Parliament, Claudia
Publisher: name: Unknown
Year: 1990
Subjects: Agribusiness

description: Profitability measures are omitted from performance analyses of marketing pool cooperatives that do not include raw products in their reported costs. A procedure to estimate the profitability of these cooperatives is proposed, converting net proceeds to a figure comparable to standard net profit or net margin. The median ROE calculated using the proposed adjustment was found to be significantly different from the median ROE of "net-margin-reporting" pools over the period 1971-1987. Application of this procedure will allow pool cooperatives to compare their profitability to other cooperatives and investor-owned firms.
Segment anything model (SAM) for brain extraction in fMRI studies
Creators: name: Chenna, Dwith
name: Bhogawar, Suyash
Publisher: name: arXiv
Year: 2024
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Brain extraction and removal of skull artifacts from magnetic resonance images (MRI) is an important preprocessing step in neuroimaging analysis. There are many tools developed to handle human fMRI images, which could involve manual steps for verifying results from brain segmentation that makes it time consuming and inefficient. In this study, we will use the segment anything model (SAM), a freely available neural network released by Meta[4], which has shown promising results in many generic segmentation applications. We will analyze the efficiency of SAM for neuroimaging brain segmentation by removing skull artifacts. The results of the experiments showed promising results that explore using automated segmentation algorithms for neuroimaging without the need to train on custom medical imaging dataset.
ESTIMATING INVESTMENT RIGIDITY WITHIN A THRESHOLD REGRESSION FRAMEWORK: THE CASE OF U.S. HOG PRODUCTION SECTOR
Creators: name: Boetel, Brenda L.
name: Hoffmann, Ruben
name: Liu, Donald J.
name: Boetel, Brenda L.
name: Hoffmann, Ruben
name: Liu, Donald J.
Publisher: name: Unknown
Year: 2004
Subjects: Livestock Production/Industries

description: As the U.S. hog production sector becomes ever more specialized, the importance of capital inputs has heightened. Given that it is costly to adjust the capital stock and that the associated adjustment cost function may exhibit cost asymmetries between investment and disinvestment, profit-maximizing producers may find themselves trapped in a situation where it is neither profitable investing nor worthwhile disinvesting. This article addresses two issues related to the employment of quasi-fixed input in the U.S. hog production sector: does an inaction or sluggish regime exist in the demand for quasi-fixed input, and, if so, to what extent has this impeded adjustment in quasi-fixed input stock and, hence, hog output supply toward the long-term equilibrium levels? The conceptual framework is based on the work by Abel and Eberly and allows for the existence of an inaction/sluggish regime, alongside an investment regime and a disinvestment regime. Quarterly data from 1976 through 1999 are used to estimate the three-regime investment demand equation, treating breeding sows as the quasi-fixed input. The threshold estimation procedure recently advanced by Hansen is adopted. To provide a linkage between breeding herd investment and hog output supply, a hog supply equation, specified in part as a function of lagged breeding stock, is estimated by a least squares procedure. The dynamic recursive system of investment demand and hog supply is used to simulate the effects on breeding stock and hog supply of changes in the magnitude of investment rigidities. The econometric results strongly support the three-regime breeding herd investment model. More than 10 percent of the observations fall into the sluggish regime, indicating that this regime has occurred sufficiently often to warrant attention. The estimated rate of adjustment toward the long-run equilibrium breeding stock is 2.7 percent per quarter. The existence of a linkage between lagged breeding stock and hog supply is confirmed. Thus, the results suggest that it is important to account for investment rigidity when estimating breeding herd demand and hog supply. Simulation results indicate that the effects on breeding stock and hog supply of continued specialization in the hog production sector may not be as significant as what the hog production sector has experienced in the past decades. More importantly the simulations suggest that the impact of increasing investment rigidity is rather modest, about 3 percent at most and, thus, no policy intervention appears to be needed. However, the econometric results clearly indicate that estimates will be biased if investment rigidity is not explicitly accounted for when estimating breeding herd demand and hog supply.
Degradation of domains with sequential field application
Creators: name: Caballero, Nirvana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Recent experiments show striking unexpected features when alternating square magnetic field pulses are applied to ferromagnetic samples: domains show area reduction and domains walls change their roughness. We explain these phenomena with a simple scalar-field model, using a numerical protocol that mimics the experimental one. For a bubble and a stripe domain, we reproduce the experimental findings: The domains shrink by a combination of linear and exponential behavior. We also reproduce the roughness exponents found in the experiments. Our results suggest that the observed effects are due to a change in the disorder correlation length when the domain walls are subject to alternating fields during the first cycles, where the initial state of the interface plays a crucial role. Finally, our simulations explain the area loss by the interplay between disorder effects and effective fields induced by the local domain curvature.
description: Accepted in JSTAT
Optimal matching between curves in a manifold
Creators: name: Brigant, Alice Le
name: Arnaudon, Marc
name: Barbaresco, Frédéric
Publisher: name: arXiv
Year: 2024
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: This paper is concerned with the computation of an optimal matching between two manifold-valued curves. Curves are seen as elements of an infinite-dimensional manifold and compared using a Riemannian metric that is invariant under the action of the reparameterization group. This group induces a quotient structure classically interpreted as the ''shape space''. We introduce a simple algorithm allowing to compute geodesics of the quotient shape space using a canonical decomposition of a path in the associated principal bundle. We consider the particular case of elastic metrics and show simulations for open curves in the plane, the hyperbolic plane and the sphere.
description: arXiv admin note: substantial text overlap with arXiv:1703.05107
The bulk Lorentz factor crisis of TeV blazars : evidence for an inhomogeneous pileup energy distribution ?
Creators: name: Henri, Gilles
name: Sauge, Ludovic
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There is growing evidence that the estimations of the beaming Doppler factor in TeV BL Lac object based on the Self Synchrotron Compton (SSC) models are in strong disagreement with those deduced from the unification models between blazars and radio galaxies. When corrected from extragalactic absorption by the diffuse infrared background (DIrB), the SSC one-zone models require very high Lorentz factor (around 50) to avoid strong gamma-gamma absorption. However, the statistics on beamed vs. unbeamed objects, as well as the luminosity contrast, favors much lower Lorentz factor of the order of 3. In this paper, we show that for the special case of Markarian 501, the need for very high Lorentz factor is unavoidable for all one-zone models where all photons are assumed to be produced at the same location at the same time. Models assuming a double structure with two different beaming patterns can partially solve the problem of luminosity contrast, but we point out that they are inconsistent with the statistics on the number of detected TeV sources. The only way to solve the issue is to consider inhomogeneous models, where low energy and high energy photons are not produced at the same place, allowing for much smaller Lorentz factors. It implies that the jet is stratified, but also that the particle energy distribution is close to a monoenergetic one, and that pair production is likely to be significant. The implications on relativistic jet physics and particle acceleration mechanism are discussed.
description: 31 pages, 5 figures. Accepted for publication in ApJ
Corpus sp{é}cialis{é} et ressource de sp{é}cialit{é}
Creators: name: Jacquemin, Bernard
name: Ploux, Sabine
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: "Semantic Atlas" is a mathematic and statistic model to visualise word senses according to relations between words. The model, that has been applied to proximity relations from a corpus, has shown its ability to distinguish word senses as the corpus' contributors comprehend them. We propose to use the model and a specialised corpus in order to create automatically a specialised dictionary relative to the corpus' domain. A morpho-syntactic analysis performed on the corpus makes it possible to create the dictionary from syntactic relations between lexical units. The semantic resource can be used to navigate semantically - and not only lexically - through the corpus, to create classical dictionaries or for diachronic studies of the language.
description: 16 pages, in French
Identifying Best Practice Melting Patterns in Induction Furnaces: A Data-Driven Approach Using Time Series KMeans Clustering and Multi-Criteria Decision Making
Creators: name: Howard, Daniel Anthony
name: Jørgensen, Bo Nørregaard
name: Ma, Zheng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: Numerical Analysis (math.NA)
subject: Performance (cs.PF)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Improving energy efficiency in industrial production processes is crucial for competitiveness, and compliance with climate policies. This paper introduces a data-driven approach to identify optimal melting patterns in induction furnaces. Through time-series K-means clustering the melting patterns could be classified into distinct clusters based on temperature profiles. Using the elbow method, 12 clusters were identified, representing the range of melting patterns. Performance parameters such as melting time, energy-specific performance, and carbon cost were established for each cluster, indicating furnace efficiency and environmental impact. Multiple criteria decision-making methods including Simple Additive Weighting, Multiplicative Exponential Weighting, Technique for Order of Preference by Similarity to Ideal Solution, modified TOPSIS, and VlseKriterijumska Optimizacija I Kompromisno Resenje were utilized to determine the best-practice cluster. The study successfully identified the cluster with the best performance. Implementing the best practice operation resulted in an 8.6 % reduction in electricity costs, highlighting the potential energy savings in the foundry.
Development and validation of a metabolite index for obstructive sleep apnea across race/ethnicities
Creators: name: Redline, Susan
name: Tracy, Russell
name: Shah, Neomi A.
name: Chen, Han
name: Rotter, Jerome I.
name: Cai, Jianwen
name: Clish, Clary
name: Gerszten, Robert
name: Sofer, Tamar
name: Ramos, Alberto R.
name: Zee, Phyllis C.
name: Daviglus, Martha L.
name: Rich, Stephen S.
name: Yu, Bing
name: Kaplan, Robert
name: Gharib, Sina A.
name: Durda, Peter
name: Kristal, Bruce S.
name: Ngo, Debby
name: Zhang, Ying
Publisher: name: Springer Nature
Year: 2022

description:
Obstructive sleep apnea (OSA) is a common disorder characterized by recurrent episodes of upper airway obstruction during sleep resulting in oxygen desaturation and sleep fragmentation, and associated with increased risk of adverse health outcomes. Metabolites are being increasingly used for biomarker discovery and evaluation of disease processes and progression. Studying metabolomic associations with OSA in a diverse community-based cohort may provide insights into the pathophysiology of OSA. We aimed to develop and replicate a metabolite index for OSA and identify individual metabolites associated with OSA. We studied 219 metabolites and their associations with the apnea hypopnea index (AHI) and with moderate-severe OSA (AHI ≥ 15) in the Hispanic Community Health Study/Study of Latinos (HCHS/SOL) (n = 3507) using two methods: (1) association analysis of individual metabolites, and (2) least absolute shrinkage and selection operator (LASSO) regression to identify a subset of metabolites jointly associated with OSA, which was used to develop a metabolite index for OSA. Results were validated in the Multi-Ethnic Study of Atherosclerosis (MESA) (n = 475). When assessing the associations with individual metabolites, we identified seven metabolites significantly positively associated with OSA in HCHS/SOL (FDR p < 0.05), of which four associations—glutamate, oleoyl-linoleoyl-glycerol (18:1/18:2), linoleoyl-linoleoyl-glycerol (18:2/18:2) and phenylalanine, were replicated in MESA (one sided-p < 0.05). The OSA metabolite index, composed of 14 metabolites, was associated with a 50% increased risk for moderate-severe OSA (OR = 1.50 [95% CI 1.21–1.85] per 1 SD of OSA metabolite index, p < 0.001) in HCHS/SOL and 55% increased risk (OR = 1.55 [95% CI 1.10–2.20] per 1 SD of OSA metabolite index, p = 0.013) in MESA, both adjusted for demographics, lifestyle, and comorbidities. Similar albeit less significant associations were observed for AHI. Replication of the metabolite index in an independent multi-ethnic dataset demonstrates the robustness of metabolomic-based OSA index to population heterogeneity. Replicated metabolite associations may provide insights into OSA-related molecular and metabolic mechanisms.
Archilejeunea nebeliana Gradst. et Schaf.
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Archilejeunea
Archilejeunea nebeliana

description: Archilejeunea nebeliana Gradst. et Schäf.-Verw.,
Cryptog. Bryol. 33 (2): 108, 2012 (see Gradstein & Schäfer-Verwimp 2012).
TYPE: “ Ecuador, Zamora-Chinchipe: ca 5 km S of Zamora, Parque Nacional Podocarpus, entrance Río Bombuscara, sendero Mirador, 4°06,831′S, 78°58.017’W, on thin trunks in submontane rain forest, 1075 m alt., 25 January 2011, A. Schäfer-Verwimp & M. Nebel 31924, STU, isotype in JE, QCQ ”.
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 63, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611
Neutrino Oscillations in the Early Universe: A Real Time Formulation
Creators: name: Ho, C. M.
name: Boyanovsky, D.
name: de Vega, H. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Neutrino oscillations in the early Universe prior to the epoch of primordial nucleosynthesis is studied by implementing real time non-equilibrium field theory methods. We focus on two flavors of Dirac neutrinos, however, the formulation is general. We obtain the equations of motion for neutrino wavepackets of either chirality and helicity in the plasma allowing for CP asymmetry. Contributions non-local in space-time to the self-energy dominate over the asymmetry for $T \gtrsim 3-5 \mathrm{MeV}$ if the lepton and neutrino asymmetries are of the same order as the baryon asymmetry. We find a new contribution which cannot be interpreted as the usual effective potential. The mixing angles and dispersion relations in the medium depend on \emph{helicity}. We find that resonant transitions are possible in the temperature range $ 10 \lesssim T \ll 100 \mathrm{MeV} $. Near a resonance in the mixing angle, the oscillation time scale in the medium as compared to the vacuum is \emph{slowed-down} substantially for small vacuum mixing angle. The time scale of oscillations \emph{speeds-up} for off resonance high energy neutrinos for which the mixing angle becomes vanishingly small. The equations of motion reduce to the familiar oscillation formulae for negative helicity ultrarelativistic neutrinos, but include consistently both the \emph{mixing angle and the oscillation frequencies in the medium}. These equations of motion also allow to study the dynamics of right handed as well as positive helicity neutrinos.
description: 31 pages 2 figures. Version to appear in Phys. Rev. D
Diagnostic data integration using deep neural networks for real-time plasma analysis
Creators: name: Garola, A. Rigoni
name: Cavazzana, R.
name: Gobbin, M.
name: Delogu, R. S.
name: Manduchi, G.
name: Taliercio, C.
name: Luchetta, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Machine Learning (cs.LG)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: I.2.1
subject: 60G35

description: Recent advances in acquisition equipment is providing experiments with growing amounts of precise yet affordable sensors. At the same time an improved computational power, coming from new hardware resources (GPU, FPGA, ACAP), has been made available at relatively low costs. This led us to explore the possibility of completely renewing the chain of acquisition for a fusion experiment, where many high-rate sources of data, coming from different diagnostics, can be combined in a wide framework of algorithms. If on one hand adding new data sources with different diagnostics enriches our knowledge about physical aspects, on the other hand the dimensions of the overall model grow, making relations among variables more and more opaque. A new approach for the integration of such heterogeneous diagnostics, based on composition of deep variational autoencoders, could ease this problem, acting as a structural sparse regularizer. This has been applied to RFX-mod experiment data, integrating the soft X-ray linear images of plasma temperature with the magnetic state. However to ensure a real-time signal analysis, those algorithmic techniques must be adapted to run in well suited hardware. In particular it is shown that, attempting a quantization of neurons transfer functions, such models can be modified to create an embedded firmware. This firmware, approximating the deep inference model to a set of simple operations, fits well with the simple logic units that are largely abundant in FPGAs. This is the key factor that permits the use of affordable hardware with complex deep neural topology and operates them in real-time.
description: Proceeding of the 22nd IEEE Real Time Conference
Collimation of astrophysical jets - the role of the accretion disk magnetic field distribution
Creators: name: Fendt, Christian
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have applied axisymmetric MHD simulations to investigate the impact of the accretion disk magnetic flux profile on the jet collimation. Using the ZEUS-3D code modified for magnetic diffusivity, our simulations evolve from an initial hydrostatic equilibrium state in a force-free magnetic field. Considering a power law for the disk poloidal magnetic field profile Bp ~ r^{-mu} and for the disk wind density profile rho ~ r^{-mu_rho} we performed a systematic study over a wide parameter range mu and mu_rho. We find a degree of collimation (ratio of mass flow rates in axial and lateral direction) decreasing for steeper disk magnetic field profiles (increasing mu). Varying the total magnetic flux doesn't change the degree of jet collimation substantially, it only affects the time scale of outflow evolution and the terminal jet speed. As our major result we find a general relation between the collimation degree with the disk wind magnetization power law exponent. Outflows with high collimation degree resulting from a flat disk magnetic field profile tend to be unsteady, producing axially propagating knots as discussed earlier. Depending slightly on the inflow density profile this unsteady behavior sets in for mu < 0.4. We also performed simulations of jet formation with artificially enhanced decay of the toroidal magnetic field in order to investigate the idea of a purely "poloidal collimation" discussed in the literature. These outflows remain weakly collimated and propagate with lower velocity. Thanks to our large numerical grid size (7x14 AU for protostars), we may apply our results to recently observed hints of jet rotation (DG Tau) indicating a relatively flat disk magnetic field profile, mu ~ 0.5. In general, our results are applicable to both stellar and extragalactic sources of MHD jets.
description: accepted by ApJ, high resolution version under www.mpia-hd.mpg.de/homes/fendt/
The Lempert function of the symmetrized polydisc in higher dimensions is not a distance
Creators: name: Nikolov, Nikolai
name: Pflug, Peter
name: Zwonek, Wlodzimierz
Publisher: name: arXiv
Year: 2006
Subjects: subject: Complex Variables (math.CV)
subject: FOS: Mathematics
subject: 32F45

description: We prove that the Lempert function of the symmetrized polydisc in dimension greater than two is not a distance.
Balanced routing of random calls
Creators: name: Luczak, Malwina J.
name: McDiarmid, Colin
Publisher: name: arXiv
Year: 2008
Subjects: subject: Probability (math.PR)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: We consider an online network routing problem in continuous time, where calls have Poisson arrivals and exponential durations. The first-fit dynamic alternative routing algorithm sequentially selects up to $d$ random two-link routes between the two endpoints of a call, via an intermediate node, and assigns the call to the first route with spare capacity on each link, if there is such a route. The balanced dynamic alternative routing algorithm simultaneously selects $d$ random two-link routes, and the call is accepted on a route minimising the maximum of the loads on its two links, provided neither of these two links is saturated. We determine the capacities needed for these algorithms to route calls successfully and find that the balanced algorithm requires a much smaller capacity. In order to handle such interacting random processes on networks, we develop appropriate tools such as lemmas on biased random walks.
description: Published at http://dx.doi.org/10.1214/14-AAP1023 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
title: Επανάχρηση/Ανακατασκευή του Ιταλικού στρατώνα ως νέα Δημοτική βιβλιοθήκη στα Χανιά
title: Reuse / Reconstruction of the Italian barracks as a new Municipal Library in Chania.
Creators: name: Λαγου Αννα-Μαρια
Publisher: name: Technical University of Crete
Year: 2021

description: Αντικείμενο μελέτης της παρούσας διπλωματικής μεταπτυχιακής εργασίας είναι η ανακατασκευή και επανάχρηση του ιστορικού κτηρίου του Πολεμικού Μουσείου- πρώην Ιταλικών στρατώνων, ως νέα Δημοτική βιβλιοθήκη στο κέντρο της πόλης των Χανίων. Το κτήριο έχει υποστεί σημαντικές φθορές ως συνέπεια πυρκαγιάς και μόνο τμήμα του κελύφους του σώζεται έως σήμερα.
Στόχος της εργασίας είναι να γίνει μια ολοκληρωμένη πρόταση ανακατασκευής του κτηρίου με φέρουσα ικανότητα την ισορροπία, παρουσία υφιστάμενου και νέου. Έτσι, μέσω του σχεδιασμού το κτήριο θα μπορεί να αποκτήσει νέα λειτουργικότητα μέσω της οποίας θα αναδεικνύεται η ιστορικότητά του.
Για το λόγο αυτό, πέρα από την ένταξη της νέας χρήσης στο κτήριο και το ιστορικό δομημένο περιβάλλον του, μελετήθηκε, έπειτα από επιτόπια και βιβλιογραφική έρευνα και η υφιστάμενη κατάσταση της τοιχοποιίας του, λαμβάνοντας υπόψη τις δομικές βλάβες που μπορεί να έχει υποστεί ο φορέας.
Πρόκειται ουσιαστικά για μια περίπτωση μελέτης που βασίζεται στην διεπιστημονικότητα των κλάδων του μεταπτυχιακού αυτού προγράμματος με στόχο την ανάδειξη μιας μεθοδολογίας μελέτης που οδηγεί στην επιλογή ορθότερων επιλογών και ενιαίας σχεδιαστικής επίλυσης στην ανακατασκευή και επανάχρηση του κτηρίου.
description: The object of this dissertation is the reconstruction and reuse of the historic building of the War Museum - former Italian barracks, as a new Municipal Library in the center of the city of Chania. The building has suffered significant damage as a result of fire and only part of its shell survives to this day.
The aim of the work is to make a complete proposal for the reconstruction of the building with the ability to carry the balance, in the presence of existing and new. Thus, through the design, the building will be able to acquire new functionality through which its historicity will be highlighted.
For this reason, in addition to the integration of the new use in the building and its historic built environment, the existing condition of its masonry was studied, after field and bibliographic research, taking into account the structural damage that the structure may have suffered.
This is essentially a case study based on the interdisciplinarity of the branches of this postgraduate program with the aim of highlighting a study methodology that leads to the selection of more correct options and a single design solution in the reconstruction and reuse of the building.
Aureolejeunea microscypha M. Wigginton
Creators: name: Söderström, Lars
name: Hagborg, Anders
name: Konrat, Matt Von
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Plantae
Bryophyta
Jungermanniopsida
Porellales
Lejeuneaceae
Aureolejeunea
Aureolejeunea microscypha

description: ** Aureolejeunea microscypha (Hook.f. et Taylor) M.Wigginton,
Moss. Liverw. St Helena: 25, 2012, nom. inval. ICN Art. 41.5; basionym not cited (see Wigginton 2012b). BASIONYM: Jungermannia microscypha Hook.f. et Taylor, London J. Bot. 4: 90, 1845 (see Hooker & Taylor 1845).
description: Published as part of Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2014, Early Land Plants Today: Index of Liverworts & Hornworts 2011 - 2012, pp. 61-85 in Phytotaxa 170 (2) on page 63, DOI: 10.11646/phytotaxa.170.2.1, http://zenodo.org/record/4779611