cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Assessing the Responses of Large Language Models (ChatGPT-4, Gemini, and Microsoft Copilot) to Frequently Asked Questions in Breast Imaging: A Study on Readability and Accuracy
Creators: name: Tepe, Murat
name: Emekli, Emre
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 320222
subject: Radiology and organ imaging

description: Large language models (LLMs) like ChatGPT-4, Gemini, and Microsoft Copilot have transformed AI by generating human-like text and answering queries accurately. This study evaluates the readability and accuracy of LLM responses to frequently asked questions in breast imaging, a field critical for early disease detection. The findings reveal significant differences among LLMs: Gemini and Microsoft Copilot produced more readable responses, while ChatGPT-4 provided more accurate answers.These insights are crucial for enhancing patient health literacy and engagement. The study underscores the potential of LLMs in healthcare, highlighting the need for ongoing evaluation to ensure quality and consistency. Future research should focus on the longitudinal impact of LLM interactions on patient outcomes and the continuous improvement of AI tools in medical communication. This work contributes to the evolving role of AI in healthcare, aiming to improve patient education and support informed decision-making.
Orocharis ctypodes Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis ctypodes

description: Orocharis ctypodes Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 238, fig. 234.
Holotype male No. 3093, from Vista Alegre, Santiago de Cuba province, Cuba. [ANSP- 3093].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Faster arbitrary-precision dot product and matrix multiplication
Creators: name: Johansson, Fredrik
Publisher: name: arXiv
Year: 2019
Subjects: subject: Mathematical Software (cs.MS)
subject: Numerical Analysis (math.NA)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We present algorithms for real and complex dot product and matrix multiplication in arbitrary-precision floating-point and ball arithmetic. A low-overhead dot product is implemented on the level of GMP limb arrays; it is about twice as fast as previous code in MPFR and Arb at precision up to several hundred bits. Up to 128 bits, it is 3-4 times as fast, costing 20-30 cycles per term for floating-point evaluation and 40-50 cycles per term for balls. We handle large matrix multiplications even more efficiently via blocks of scaled integer matrices. The new methods are implemented in Arb and significantly speed up polynomial operations and linear algebra.
Orocharis eucelados Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis eucelados

description: Orocharis eucelados Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 238, fig. 235.
Holotype male, from El Abra, Isla de Pinos [at present Isle of Youth], Cuba. [ANSP-3089].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Reconstruction of a Local Perturbation in Inhomogeneous Periodic Layers from Partial Near Field Measurements
Creators: name: Konschin, Alexander
name: Lechleiter, Armin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Analysis of PDEs (math.AP)
subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We consider the inverse scattering problem to reconstruct a local perturbation of a given inhomogeneous periodic layer in $\mathbb{R}^d$, $d=2,3$, using near field measurements of the scattered wave on an open set of the boundary above the medium, or, the measurements of the full wave in some area. The appearance of the perturbation prevents the reduction of the problem to one periodic cell, such that classical methods are not applicable and the problem becomes more challenging. We first show the equivalence of the direct scattering problem, modeled by the Helmholtz equation formulated on an unbounded domain, to a family of quasi-periodic problems on a bounded domain, for which we can apply some classical results to provide unique existence of the solution to the scattering problem. The reformulation of the problem is also the key idea for the numerical algorithm to approximate the solution, which we will describe in more detail. Moreover, we characterize the smoothness of the Bloch-Floquet transformed solution of the perturbed problem w.r.t. the quasi-periodicity to improve the convergence rate of the numerical approximation. Afterward, we define two measurement operators, which map the perturbation to some measurement data, and show uniqueness results for the inverse problems, and the ill-posedness of these. Finally, we provide numerical examples for the direct problem solver as well as examples of the reconstruction in 2D and 3D.
Orocharis eumeles Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis eumeles

description: Orocharis eumeles Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 240, fig. 240.
Holotype male, from Ciénaga de Zapata, Playa Larga, L.V. [at present Matanzas province], Cuba. [ANSP-3088].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
A Modern Retrospective on Probabilistic Numerics
Creators: name: Oates, C. J.
name: Sullivan, T. J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: History and Overview (math.HO)
subject: Probability (math.PR)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: 62-03, 65-03, 01A60, 01A65, 01A67

description: This article attempts to place the emergence of probabilistic numerics as a mathematical-statistical research field within its historical context and to explore how its gradual development can be related both to applications and to a modern formal treatment. We highlight in particular the parallel contributions of Sul'din and Larkin in the 1960s and how their pioneering early ideas have reached a degree of maturity in the intervening period, mediated by paradigms such as average-case analysis and information-based complexity. We provide a subjective assessment of the state of research in probabilistic numerics and highlight some difficulties to be addressed by future works.
description: 23 pages, 2 figures
An acoustic-convective splitting-based approach for the Kapila two-phase flow model
Creators: name: Eikelder, M. ten
name: Daude, F.
name: Koren, B.
name: Tijsseling, A.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: In this paper we propose a new acoustic-convective splitting-based numerical scheme for the Kapila five-equation two-phase flow model. The splitting operator decouples the acoustic waves and convective waves. The resulting two submodels are alternately numerically solved to approximate the solution of the entire model. The Lagrangian form of the acoustic submodel is numerically solved using an HLLC-type Riemann solver whereas the convective part is approximated with an upwind scheme. The result is a simple method which allows for a general equation of state. Numerical computations are performed for standard two-phase shock tube problems. A comparison is made with a non-splitting approach. The results are in good agreement with reference results and exact solutions.
description: Postprint version
Laurenceomyia Wagner & Stuckenberg 2016
Creators: name: Santos, Claudiney Biral Dos
name: Brazil, Reginaldo Peçanha
name: Pinto, Israel De Souza
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Laurenceomyia

description: Genus Laurenceomyia Wagner & Stuckenberg, 2016
The Laurenceomyia genus was dedicated to Lawrence W. Quate for his contribution to the psychodids studies and its type species is Laurenceomyia dampfianus (Alexander). According to cladistics analysis, the diagnostic characters of this genus are: aedeagus about as long as ejaculatory apodeme and gonocoxites; gonocoxites with mesal projection near apex; gonostyli elongate, straight along most of their length, subapically strongly bent with blunt apex.
description: Published as part of Santos, Claudiney Biral Dos, Brazil, Reginaldo Peçanha & Pinto, Israel De Souza, 2021, New species of Boreofairchildia Wagner & Stuckenberg and Laurenceomyia Wagner & Stuckenberg (Diptera: Psychodidae: Bruchomyiinae) from Brazil, pp. 391-395 in Zootaxa 4974 (2) on page 392, DOI: 10.11646/zootaxa.4974.2.8, http://zenodo.org/record/4775795
Orocharis eveches Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis eveches

description: Orocharis eveches Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 238, fig. 236.
Holotype male, from Vista Alegre, Santiago de Cuba province, Cuba. [ANSP-3087].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Compression fatigue of elastomeric foams used in midsoles of running shoes
Creators: name: Aimar, C.
name: Orgéas, L.
name: du Roscoat, S. Rolland
name: Bailly, L.
name: Sentis, D. Ferré
Publisher: name: Taylor & Francis
Year: 2024
Subjects: subject: Biophysics
subject: Biochemistry
subject: Physical Sciences not elsewhere classified
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Due to their excellent specific mechanical properties, closed cell elastomeric foams are the main element in the soles of running shoes to absorb repetitive shocks from strides and to release a maximum of the absorbed energy. However, these cellular materials are gradually damaged. To enhance their mechanical durability by slowing their damage kinetics, it is critical to understand their mechanical behaviour in fatigue. The objective of this work is thus to clarify the link between the microstructure and the fatigue properties of five commercial elastomeric foams used in the midsoles of running shoes. The 3D cellular structures of each foam were finely analysed using X-ray microtomography. Foam samples were then subjected to cyclic compression which were close to running conditions. During cycling, samples exhibited a rapid densification associated with noticeable decreases of (i) the stress levels required to deform them as well as (ii) the cushioning and (iii) the rebound properties. We show that the two midsoles filled with micro-sized mineral fillers present the highest specific mechanical properties during the first compression cycle and during fatigue. However, their damage kinetics and rebound properties could probably be improved by tuning the fillers-matrix compatibility. The lightest foam, being very porous and presenting process-induced tortuous cell walls, is the best cushioning system but exhibits high damage kinetics. The densest foam presents poor specific mechanical properties, but very slow damage kinetics. Its double hierarchical architecture probably prevents the occurrence of micro-cracks in the cell walls.
Orocharis longivivax Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis longivivax

description: Orocharis longivivax Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 240, fig. 237.
Holotype male, from Vista Alegre, Santiago de Cuba province, Cuba. [ANSP-3090].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Fast algorithms for convolution quadrature of Riemann-Liouville fractional derivative
Creators: name: Sun, Jing
name: Nie, Daxin
name: Deng, Weihua
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 26A33, 44A35, 65M06

description: Recently, the numerical schemes of the Fokker-Planck equations describing anomalous diffusion with two internal states have been proposed in [Nie, Sun and Deng, arXiv: 1811.04723], which use convolution quadrature to approximate the Riemann-Liouville fractional derivative; and the schemes need huge storage and computational cost because of the non-locality of fractional derivative and the large scale of the system. This paper first provides the fast algorithms for computing the Riemann-Liouville derivative based on convolution quadrature with the generating function given by the backward Euler and second-order backward difference methods; the algorithms don't require the assumption of the regularity of the solution in time, while the computation time and the total memory requirement are greatly reduced. Then we apply the fast algorithms to solve the homogeneous fractional Fokker-Planck equations with two internal states for nonsmooth data and get the first- and second-order accuracy in time. Lastly, numerical examples are presented to verify the convergence and the effectiveness of the fast algorithms.
description: 32 pages, 2 figures
Orocharis nocticola Otte and Perez-Gelabert 2009
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Orocharis
Orocharis nocticola

description: Orocharis nocticola Otte and Perez-Gelabert, 2009
Otte and Perez-Gelabert, 2009: 240, fig. 238.
Holotype male, from La Cuaba, Holguín province, Cuba. [ANSP- 3075].
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 420, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Oecanthus allardi T. Walker and Gurney 1960
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Oecanthus
Oecanthus allardi

description: Oecanthus allardi T. Walker and Gurney, 1960
T. Walker and Gurney, 1960: 9, fig. 1; Zayas, 1976: 79, fig. 72; Otte and Perez-Gelabert, 2009: 492, fig. 453.
Holotype male, from Christiansted, St. Croix, Virgin Islands. [NMNH-64826].
Distribution. Cuba, Hispaniola, Jamaica, Mona, Puerto Rico, St. Croix, St. Kitts and St. Thomas.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
A phase-field model for fractures in incompressible solids
Creators: name: Mang, Katrin
name: Wick, Thomas
name: Wollner, Winnifried
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65N30, 65N12, 35Q74, 74R10

description: Within this work, we develop a phase-field description for simulating fractures in incompressible materials. Standard formulations are subject to volume-locking when the solid is (nearly) incompressible. We propose an approach that builds on a mixed form of the displacement equation with two unknowns: a displacement field and a hydro-static pressure variable. Corresponding function spaces have to be chosen properly. On the discrete level, stable Taylor-Hood elements are employed for the displacement-pressure system. Two additional variables describe the phase-field solution and the crack irreversibility constraint. Therefore, the final system contains four variables: displacements, pressure, phase-field, and a Lagrange multiplier. The resulting discrete system is nonlinear and solved monolithically with a Newton-type method. Our proposed model is demonstrated by means of several numerical studies based on two numerical tests. First, different finite element choices are compared in order to investigate the influence of higher-order elements in the proposed settings. Further, numerical results including spatial mesh refinement studies and variations in Poisson's ratio approaching the incompressible limit, are presented.
Nemobiopsis Bolivar 1890
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Nemobiopsis

description: Genus Nemobiopsis Bolívar, 1890
Nemobiopsis Bolívar, 1890: 329.
Type species: Nemobiopsis gundlachi Bolívar, 1890.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
INFLUENCE OF FARTLEK TRAINING ON STRENGTH ENDURANCE AND CARDIO RESPIRATORY ENDURANCE AMONG COLLEGE MEN STUDENTS
Creators: name: Dr. R. Sudeepkumar
Publisher: name: Zenodo
Year: 2022

description: The purpose of the study was designed to examine the effect of Fartlek training on strength endurance and cardio respiratory endurance of college men students. For the purpose of the study, thirty men students from the University College of Arts, Tumkur University, Tumkur, Karnataka, India were selected as subjects. They were divided into two equal groups.  each group consisted of the fifteen subjects.  Group I underwent Fartlek training for three days per week for twelve weeks. Group II acted as control who did not undergo any special training programme apart from their regular physical education programme. The following variables, namely strength endurance and cardio respiratory endurance were selected as criterion variables. All the subjects of two groups were tested on selected dependent variables by using bend knee sit ups and cooper’s 12 minutes run / walk test respectively at prior to and immediately after the training programme. The analysis of covariance was used to analyze the significant difference if any among the groups. The .05 level of confidence was fixed as the level of significance to test the ‘F’ ratio obtained by the analysis of covariance, which was considered appropriate. The results of the study showed that there was a significant difference between Fartlek training group and control group on strength endurance and cardio respiratory endurance. And also it was found that there was a significant improvement on strength endurance and cardio respiratory endurance due to twelve weeks of Fartlek training.
Boreofairchildia Wagner & Stuckenberg 2016
Creators: name: Santos, Claudiney Biral Dos
name: Brazil, Reginaldo Peçanha
name: Pinto, Israel De Souza
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Psychodidae
Boreofairchildia

description: Genus Boreofairchildia Wagner & Stuckenberg, 2016
The genus Boreofairchildia was dedicated to G. B. Fairchild for his contribution in the Neotropical psychodids studies and its type species is Boreofairchildia dampfianus (Tonnoir). According to cladistics analysis, the diagnostic characters of this genus are: aedeagus as long as or slightly shorter than ejaculatory apodeme and gonocoxites; gonocoxites without medial appendages, gonostyli basally broad, with two or more distal projections.
description: Published as part of Santos, Claudiney Biral Dos, Brazil, Reginaldo Peçanha & Pinto, Israel De Souza, 2021, New species of Boreofairchildia Wagner & Stuckenberg and Laurenceomyia Wagner & Stuckenberg (Diptera: Psychodidae: Bruchomyiinae) from Brazil, pp. 391-395 in Zootaxa 4974 (2) on page 392, DOI: 10.11646/zootaxa.4974.2.8, http://zenodo.org/record/4775795
Nemobiopsis cavicola Bonfils 1981
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Nemobiopsis
Nemobiopsis cavicola

description: Nemobiopsis cavicola Bonfils, 1981
Bonfils, 1981: 105, figs. 6–8; Otte and Perez-Gelabert, 2009: 545, fig. 456.
Holotype male and several immature paratypes from Cueva La Eloisa, Matanzas province, Cuba. [MNHNP or ISBER].
Distribution. Cuba.
Notes. Bonfils (1981) did not specify in which of the two museums he would deposit the type specimens. The type specimen for this species is not currently found in the MNHNP database of Orthoptera types.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Robust formula for $N$-point Padé approximant calculation based on Wynn identity
Creators: name: Mishonov, T. M.
name: Varonov, A. M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: The performed numerical analysis reveals that Wynn's identity for the compass $1/(N-C)+1/(S-C)=1/(W-C)+1/(E-C)=1/η$ (here C stands for center, the other letters correspond to the four directions of the compass) gives the long sought criterion, the minimal $|η|$, for the choice of the optimal Padé approximant. The work of this method is illustrated by calculation of multipoint Padé approximation by a new formula for calculation of this best rational approximation. The work of the criterion for the calculation of optimal Padé approximant is illustrated by the frequently seen in the theoretical physics problems of calculation of series summation and multipoint Padé approximation used as a predictor for solution of differential equations motivated by the magneto-hydrodynamic problem of heating of solar corona by Alvén waves. In such a way, an efficient and valuable control mechanism for $N$-point Padé approximant calculation is proposed. We believe that the suggested method and criterion can be useful for many applied problems in numerous areas not only in physics but in any scientific application where differential equations are solved. The solution of the Cauchy-Jacobi problem is illustrated by a Fortran program. The algorithm is generalized for the case of the first $K$ derivatives at $N$ nodal points.
description: 12 pages, 6 figures, 2 appendix sections; Title and abstract precised, section Introduction restated, figure captions shortened and a new appendix section added, where the Cauchy-Jacobi problem is solved for the case of the first $K$ derivatives at $N$ nodal points
A variable nonlinear splitting algorithm for reaction-diffusion systems with self- and cross-diffusion
Creators: name: Beauregard, Matthew A.
name: Padgett, Joshua L.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: Self- and cross-diffusion are important nonlinear spatial derivative terms that are included into biological models of predator-prey interactions. Self-diffusion models overcrowding effects, while cross-diffusion incorporates the response of one species in light of the concentration of another. In this paper, a novel nonlinear operator splitting method is presented that directly incorporates both self- and cross-diffusion into a computational efficient design. The numerical analysis guarantees the accuracy and demonstrates appropriate criteria for stability. Numerical experiments display its efficiency and accuracy.
description: 21 pages, 2 figures, published (adding to complete author's arXiv repository)
Nemobiopsis decui Bonfils 1981
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Nemobiopsis
Nemobiopsis decui

description: Nemobiopsis decui Bonfils, 1981
Bonfils, 1981: 105, figs. 1–5; Otte and Perez-Gelabert, 2009: 545, fig. 457.
Holotype male and several females, males and immature paratypes from Gran Caverna de Santo Tomás, Pinar del Río province, Cuba. [MNHNP or ISBER].
Distribution. Cuba.
Notes. Bonfils (1981) did not specify in which of the two museums he would deposit his type specimens. The type specimen for this species is not currently found in the MNHNP database of Orthoptera types.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Distributed control and game design: From strategic agents to programmable machines
Creators: name: Paccagnan, Dario
Publisher: name: arXiv
Year: 2019
Subjects: subject: Optimization and Control (math.OC)
subject: Computer Science and Game Theory (cs.GT)
subject: Systems and Control (eess.SY)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Large scale systems are forecasted to greatly impact our future lives thanks to their wide ranging applications including cooperative robotics, mobility on demand, resource allocation, supply chain management. While technological developments have paved the way for the realization of such futuristic systems, we have a limited grasp on how to coordinate the individual components to achieve the desired global objective. This thesis deals with the analysis and coordination of large scale systems without the need of a centralized authority.
 In the first part of this thesis, we consider non-cooperative decision making problems where each agent's objective is a function of the aggregate behavior of the population. First, we compare the performance of an equilibrium allocation with that of an optimal allocation and propose conditions under which all equilibrium allocations are efficient. Towards this goal, we prove a novel result bounding the distance between the strategies at a Nash and Wardrop equilibrium that might be of independent interest. Second, we show how to derive scalable algorithms that guide agents towards an equilibrium allocation.
 In the second part of this thesis, we consider large-scale cooperative problems, where a number of agents need to be allocated to a set of resources with the goal of jointly maximizing a given submodular or supermodular set function. Since this class of problems is computationally intractable, we aim at deriving tractable algorithms for attaining approximate solutions. We approach the problem from a game-theoretic perspective and ask the following: how should we design agents' utilities so that any equilibrium configuration is almost optimal? To answer this question we introduce a novel framework that allows to characterize and optimize the system performance as a function of the chosen utilities by means of a tractable linear program.
description: PhD Thesis, ETH Zurich
Energy conserving upwinded compatible finite element schemes for the rotating shallow water equations
Creators: name: Wimmer, Golo
name: Cotter, Colin
name: Bauer, Werner
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We present an energy conserving space discretisation of the rotating shallow water equations using compatible finite elements. It is based on an energy and enstrophy conserving Hamiltonian formulation as described in McRae and Cotter (2014), and extends it to include upwinding in the velocity and depth advection to increase stability. Upwinding for velocity in an energy conserving context was introduced for the incompressible Euler equations in Natale and Cotter (2017), while upwinding in the depth field in a Hamiltonian finite element context is newly described here. The energy conserving property is validated by coupling the spatial discretisation to an energy conserving time discretisation. Further, the discretisation is demonstrated to lead to an improved field development with respect to stability when upwinding in the depth field is included.
description: 18 pages, 8 figures, first version: all comments welcome
Nemobiopsis gundlachi Bolivar 1890
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Nemobiopsis
Nemobiopsis gundlachi

description: Nemobiopsis gundlachi Bolívar, 1890
Bolívar, 1890: 329; Rehn, 1909: 221; Otte and Perez-Gelabert, 2009: 545.
Syntypes male and female, from Cuba. [MNCN] (París, 1994).
Distribution. Cuba.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
On the positivity, monotonicity, and stability of a semi-adaptive LOD method for solving three-dimensional degenerate Kawarada equations
Creators: name: Padgett, Joshua L.
name: Sheng, Qin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper concerns the numerical solution of three-dimensional degenerate Kawarada equations. These partial differential equations possess highly nonlinear source terms, and exhibit strong quenching singularities which pose severe challenges to the design and analysis of highly reliable schemes. Arbitrary fixed nonuniform spatial grids, which are not necessarily symmetric, are considered throughout this study. The numerical solution is advanced through a semi-adaptive Local One-Dimensional (LOD) integrator. The temporal adaptation is achieved via a suitable arc-length monitoring mechanism. Criteria for preserving the positivity and monotonicity are investigated and acquired. The numerical stability of the splitting method is proven in the von Neumann sense under the spectral norm. Extended stability expectations are proposed and investigated.
description: 24 pages, 2 figures, this article is already accepted (but is being uploaded to keep all articles on arXiv)
On a Nonuniform Crank-Nicolson Scheme for Solving the Stochastic Kawarada Equation via Arbitrary Grids
Creators: name: Padgett, Joshua L
name: Sheng, Qin
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: This paper studies a nonuniform finite difference method for solving the degenerate Kawarada quenching-combustion equation with a vibrant stochastic source. Arbitrary grids are introduced in both space and time via adaptive principals to accommodate the uncertainty and singularities involved. It is shown that, under proper constraints on mesh step sizes, the positivity, monotonicity of the solution, and numerical stability of the scheme developed are well preserved. Numerical experiments are given to illustrate our conclusions.
description: 22 pages, 19 figures, 1 table, article is already accepted (author is uploading to arXiv to centralize all papers)
Eliminación Pasiva de emisiones de metano de la minería abandonada de carbón mediante microorganismos. Estudios previos y posibilidades de futuro.
Creators: name: Marques Sierra, Antonio Luis
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 401905
subject: Mining engineering
classificationCode: 480204
subject: Mining, energy and natural resources law
classificationCode: 370201
subject: Climate change processes

description: Contibution in 2nd international conference on mining and post-mining projects. Oviedo, 30 june 2023.
Fast Calibration of Car Following models to Trajectory data using the Adjoint Method
Creators: name: Keane, Ronan
name: Gao, H. Oliver
Publisher: name: arXiv
Year: 2019
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Before a car-following model can be applied in practice, it must first be validated against real data in a process known as calibration. This paper discusses the formulation of calibration as an optimization problem, and compares different algorithms for its solution. The optimization consists of an arbitrary car following model, posed as either an ordinary or delay differential equation, being calibrated to an arbitrary source of trajectory data which may include lane changes. Typically, the calibration problem is solved using gradient free optimization. In this work, the gradient of the optimization problem is derived analytically using the adjoint method. The computational cost of the adjoint method does not scale with the number of model parameters, which makes it more efficient than evaluating the gradient numerically using finite differences. Numerical results are presented which show that quasi-newton algorithms using the adjoint method are significantly faster than a genetic algorithm, and also achieve slightly better accuracy of the calibrated model.
description: accepted to transportation science
Holographic Phase Retrieval and Reference Design
Creators: name: Barmherzig, David A.
name: Sun, Ju
name: Lane, T. J.
name: Li, Po-Nan
name: Candès, Emmanuel J.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Information Theory (cs.IT)
subject: Numerical Analysis (math.NA)
subject: Signal Processing (eess.SP)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: A general mathematical framework and recovery algorithm is presented for the holographic phase retrieval problem. In this problem, which arises in holographic coherent diffraction imaging, a "reference" portion of the signal to be recovered via phase retrieval is a priori known from experimental design. A generic formula is also derived for the expected recovery error when the measurement data is corrupted by Poisson shot noise. This facilitates an optimization perspective towards reference design and analysis. We employ this optimization perspective towards quantifying the performance of various reference choices.
description: 27 pages, 10 figures
Lifelong Federated Reinforcement Learning: A Learning Architecture for Navigation in Cloud Robotic Systems
Creators: name: Liu, Boyi
name: Wang, Lujia
name: Liu, Ming
Publisher: name: arXiv
Year: 2019
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Machine Learning (cs.LG)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper was motivated by the problem of how to make robots fuse and transfer their experience so that they can effectively use prior knowledge and quickly adapt to new environments. To address the problem, we present a learning architecture for navigation in cloud robotic systems: Lifelong Federated Reinforcement Learning (LFRL). In the work, We propose a knowledge fusion algorithm for upgrading a shared model deployed on the cloud. Then, effective transfer learning methods in LFRL are introduced. LFRL is consistent with human cognitive science and fits well in cloud robotic systems. Experiments show that LFRL greatly improves the efficiency of reinforcement learning for robot navigation. The cloud robotic system deployment also shows that LFRL is capable of fusing prior knowledge. In addition, we release a cloud robotic navigation-learning website based on LFRL.
A Sequential Least Squares Method for Poisson Equation using A Patch Reconstructed Space
Creators: name: Li, Ruo
name: Yang, Fanyi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: We propose a new least squares finite element method to solve the Poisson equation. By using a piecewisely irrotational space to approximate the flux, we split the classical method into two sequential steps. The first step gives the approximation of flux in the new approximation space and the second step can use flexible approaches to give the pressure. The new approximation space for flux is constructed by patch reconstruction with one unknown per element consisting of piecewisely irrotational polynomials. The error estimates in the energy norm and $L^2$ norm are derived for the flux and the pressure. Numerical results verify the convergence order in error estimates, and demonstrate the flexibility and particularly the great efficiency of our method.
Photoacoustic image reconstruction via deep learning
Creators: name: Antholzer, Stephan
name: Schwab, Johannes
name: Nuster, Robert
name: Haltmeier, Markus
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Medical Physics (physics.med-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Applying standard algorithms to sparse data problems in photoacoustic tomography (PAT) yields low-quality images containing severe under-sampling artifacts. To some extent, these artifacts can be reduced by iterative image reconstruction algorithms which allow to include prior knowledge such as smoothness, total variation (TV) or sparsity constraints. These algorithms tend to be time consuming as the forward and adjoint problems have to be solved repeatedly. Further, iterative algorithms have additional drawbacks. For example, the reconstruction quality strongly depends on a-priori model assumptions about the objects to be recovered, which are often not strictly satisfied in practical applications. To overcome these issues, in this paper, we develop direct and efficient reconstruction algorithms based on deep learning. As opposed to iterative algorithms, we apply a convolutional neural network, whose parameters are trained before the reconstruction process based on a set of training data. For actual image reconstruction, a single evaluation of the trained network yields the desired result. Our presented numerical results (using two different network architectures) demonstrate that the proposed deep learning approach reconstructs images with a quality comparable to state of the art iterative reconstruction methods.
description: This paper is a proceeding to our presentation (10494-168) at the Photons Plus Ultrasound: Imaging and Sensing conference (within the SPIE Photonics West), Poster Monday, January 29, 2018
INNOVATSION TA'LIM TEXNOLOGIYALAR ASOSIDA NOMUTAXASSIS TALABALAR UCHUN INFORMATIKA FANINI O'QITISH METODIKASI
Creators: name: Abduraxmanova Dilbar Xudaybergenovna
Publisher: name: Academic Scientific Research Group
Year: 2024

description: Mazkur maqolada nomutaxassis talabalarning informatika fani tayyorgarligini amalga oshirishning axborot kommunikatsiya texnologiyalari imkoniyatlari, o‘qitish usullari, mexanizmalari va shart-sharoitlari haqida ma’lumotlar keltirib o‘tilgan.
Deep learning versus $\ell^1$-minimization for compressed sensing photoacoustic tomography
Creators: name: Antholzer, Stephan
name: Schwab, Johannes
name: Haltmeier, Markus
Publisher: name: arXiv
Year: 2019
Subjects: subject: Numerical Analysis (math.NA)
subject: Medical Physics (physics.med-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We investigate compressed sensing (CS) techniques for reducing the number of measurements in photoacoustic tomography (PAT). High resolution imaging from CS data requires particular image reconstruction algorithms. The most established reconstruction techniques for that purpose use sparsity and $\ell^1$-minimization. Recently, deep learning appeared as a new paradigm for CS and other inverse problems. In this paper, we compare a recently invented joint $\ell^1$-minimization algorithm with two deep learning methods, namely a residual network and an approximate nullspace network. We present numerical results showing that all developed techniques perform well for deterministic sparse measurements as well as for random Bernoulli measurements. For the deterministic sampling, deep learning shows more accurate results, whereas for Bernoulli measurements the $\ell^1$-minimization algorithm performs best. Comparing the implemented deep learning approaches, we show that the nullspace network uniformly outperforms the residual network in terms of the mean squared error (MSE).
description: This work has been presented at the Joint Photoacoustics Session with the 2018 IEEE International Ultrasonics Symposium Kobe, October 22-25, 2018
Discrete time optimal control with frequency constraints for non-smooth systems
Creators: name: Kotpalliwar, Shruti
name: Paruchuri, Pradyumna
name: Chatterjee, Debasish
name: Banavar, Ravi
Publisher: name: arXiv
Year: 2019
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: We present a Pontryagin maximum principle for discrete time optimal control problems with (a) pointwise constraints on the control actions and the states, (b) frequency constraints on the control and the state trajectories, and (c) nonsmooth dynamical systems. Pointwise constraints on the states and the control actions represent desired and/or physical limitations on the states and the control values; such constraints are important and are widely present in the optimal control literature. Constraints of the type (b), while less standard in the literature, effectively serve the purpose of describing important spectral properties of inertial actuators and systems. The conjunction of constraints of the type (a) and (b) is a relatively new phenomenon in optimal control but are important for the synthesis control trajectories with a high degree of fidelity. The maximum principle established here provides first order necessary conditions for optimality that serve as a starting point for the synthesis of control trajectories corresponding to a large class of constrained motion planning problems that have high accuracy in a computationally tractable fashion. Moreover, the ability to handle a reasonably large class of nonsmooth dynamical systems that arise in practice ensures broad applicability our theory, and we include several illustrations of our results on standard problems.
Earthquake Early Warning and Beyond: Systems Challenges in Smartphone-based Seismic Network
Creators: name: Kong, Qingkai
name: Lv, Qin
name: Allen, Richard M.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Systems and Control (eess.SY)
subject: Computers and Society (cs.CY)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Earthquake Early Warning (EEW) systems can effectively reduce fatalities, injuries, and damages caused by earthquakes. Current EEW systems are mostly based on traditional seismic and geodetic networks, and exist only in a few countries due to the high cost of installing and maintaining such systems. The MyShake system takes a different approach and turns people's smartphones into portable seismic sensors to detect earthquake-like motions. However, to issue EEW messages with high accuracy and low latency in the real world, we need to address a number of challenges related to mobile computing. In this paper, we first summarize our experience building and deploying the MyShake system, then focus on two key challenges for smartphone-based EEW (sensing heterogeneity and user/system dynamics) and some preliminary exploration. We also discuss other challenges and new research directions associated with smartphone-based seismic network.
description: 6 pages, conference paper, already accepted at hotmobile 2019
Nemobiopsis mimoides Bonfils 1981
Creators: name: Yong, Sheyla
name: Perez-Gelabert, Daniel E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Gryllidae
Nemobiopsis
Nemobiopsis mimoides

description: Nemobiopsis mimoides Bonfils, 1981
Bonfils, 1981: 106, figs. 9–12; Otte and Perez-Gelabert, 2009: 545, fig. 458.
Holotype male and two female paratypes from Cueva Mexico, Jaronú, Camagüey province, Cuba. [MNHNP or ISBER]
Distribution. Cuba.
Notes. Bonfils (1981) did not specify in which of the two museums he would deposit his type specimens. The type specimen for this species is not currently found in the MNHNP database of Orthoptera types.
description: Published as part of Yong, Sheyla & Perez-Gelabert, Daniel E., 2014, Grasshoppers, Crickets and Katydids (Insecta: Orthoptera) of Cuba: an annotated checklist, pp. 401-438 in Zootaxa 3827 (4) on page 421, DOI: 10.11646/zootaxa.3827.4.1, http://zenodo.org/record/228581
Notonecta Hungerford 1933
Creators: name: Young, Euan C.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Notonectidae
Notonecta

description: Notonecta (Hungerford 1933)
Appendix 1 shows that for 60 species in which the identities of the morphs are clear only the flying morph is described in 44, only the flightless morph in 7, and both morphs in 9.
In his introduction Hungerford notes that the older descriptions were based on colour and that it ‘is almost impossible to appropriate them with any degree of certainty’. The coloured figures in his revision, however, ‘will enable anyone to determine the specimens in the catch that are fully and typically colored. The teneral forms and the bichromatic species may be perplexing.’ In such cases he advises turning to structural characteristics.
Although Hungerford recognised that there were discrete colour forms in these species; he refers to bichromatic species or the occurrence of melanistic specimens in an otherwise pale species (his melanochroism), or specimens with a yellowish scutellum among flying ones, he does not appear to recognise that he is dealing with the effects of flight polymorphisms.
description: Published as part of Young, Euan C., 2010, The taxonomic impediment of unrecognised flight polymorphism in Notonectidae (Hemiptera: Heteroptera), pp. 35-48 in Zootaxa 2535 on page 37, DOI: 10.5281/zenodo.196610