cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
[ARTICLE] Extended Pythagoras Theorem Using Triangles [American The Journal of Open Engineering / 2021]
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 490402
subject: Algebraic and differential geometry
classificationCode: 490499
subject: Pure mathematics not elsewhere classified
classificationCode: 490411
subject: Real and complex functions (incl. several variables)

description: This article presents a new variant of the Pythagorean theorem using triangles instead of squares. It was first published in 2021 on The Journal of Open Engineering under a Creative Commons Attribution 4.0 International License (CC-BY 4.0) - see reference at bottom for original source - and, it is made available again here to the benefit of all that might be interested in such a topic.
A figure highlighting the difference between the two theorems is also available at Figshare (the link is also provided below to the benefit of those who may be interested in exploring more).

****************************************************************************************************ABSTRACTEngineering is governed by mathematical laws, of which a pearl is the Pythagoras Theorem x2+y2=z2 - an equation that has enabled humans to solve problems for the past millennia in all fields of science, ranging from civil to electrical engineering. In view of unlocking further benefits, the present article looks at a variant equation of the Pythagoras Theorem, namely x2+xy+y2=z2. Here, it was found that just as the Pythagoras Theorem x2+y2=z2 establishes an area relation between squares along the sides of a right-angled triangle, equation x2+xy+y2=z2 extends this theorem by establishing an area relation between triangles along the sides of a 120-degree-angled triangle. Proofs are presented in both cases - including geometric and algebraic components – and are followed by classroom exercises, showing that both classical and extended versions of the Pythagoras Theorem are equally useful in cases of mathematics applied to engineering.

-------------------------------------------------------------------------For more public data, please visit my Figshare profile: https://figshare.com/authors/Luis_Teia/10811244
MPEC 2024-B140 : OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: OBSERVATIONS AND ORBITS OF COMETS AND A/ OBJECTS

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
[ARTICLE] Extended Pythagoras Theorem Using Triangles [American The Journal of Open Engineering / 2021]
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 490402
subject: Algebraic and differential geometry
classificationCode: 490499
subject: Pure mathematics not elsewhere classified
classificationCode: 490411
subject: Real and complex functions (incl. several variables)

description: This article presents a new variant of the Pythagorean theorem using triangles instead of squares. It was first published in 2021 on The Journal of Open Engineering under a Creative Commons Attribution 4.0 International License (CC-BY 4.0) - see reference at bottom for original source - and, it is made available again here to the benefit of all that might be interested in such a topic.
A figure highlighting the difference between the two theorems is also available at Figshare (the link is also provided below to the benefit of those who may be interested in exploring more).

****************************************************************************************************ABSTRACTEngineering is governed by mathematical laws, of which a pearl is the Pythagoras Theorem x2+y2=z2 - an equation that has enabled humans to solve problems for the past millennia in all fields of science, ranging from civil to electrical engineering. In view of unlocking further benefits, the present article looks at a variant equation of the Pythagoras Theorem, namely x2+xy+y2=z2. Here, it was found that just as the Pythagoras Theorem x2+y2=z2 establishes an area relation between squares along the sides of a right-angled triangle, equation x2+xy+y2=z2 extends this theorem by establishing an area relation between triangles along the sides of a 120-degree-angled triangle. Proofs are presented in both cases - including geometric and algebraic components – and are followed by classroom exercises, showing that both classical and extended versions of the Pythagoras Theorem are equally useful in cases of mathematics applied to engineering.
Probing Nuclear PDF and Gluon Saturation At The LHC with Forward Direct Photons
Creators: name: Cosentino, Mauro R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In relativistic nuclear collisions some of the important aspects to be addressed are the effects of the nuclear PDF and the gluon saturation. In the LHC the best way to address these questions is by means of pA collisions and in particular through the measurement of direct photon production in the forward direction. In order to achieve this measurement a new forward calorimeter (FoCal) is proposed as an upgrade to the ALICE experiment. The proposed detector will cover the range 3.5 < $η$ < 5, probing the gluon distributions at x$\sim$10$^{-5}$ and Q$\sim p_{\rm T}$ > 4 GeV. We will discuss performance studies and demonstrate that extremely high-granularity calorimetry is required for such measurement. We will also present a few results from R\&D for this project.
description: 8 pages, 8 figures, Proceedings of the 26th International Nuclear Physics Conference, 11-16 September 2016, Adelaide, Australia
Isolate record for VAFB-ISO-205
Creators: name: Holloway, Corinne
Year: 1990
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-205. The artifact is a broken black chert flake.
Precise in situ radius measurement of individual optically trapped microspheres using negative optical torque exerted by focused vortex beams
Creators: name: Diniz, Kainã
name: Schoger, Tanja
name: Moura, Guilherme T.
name: Fonseca, Arthur L.
name: Ether, Diney S.
name: Dutra, Rafael S.
name: Ingold, Gert-Ludwig
name: Viana, Nathan B.
name: Neto, Paulo A. Maia
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: We demonstrate a new method for determining the radius of micron-sized particles trapped by a vortex laser beam. The technique is based on measuring the rotation experienced by the center of mass of a microsphere that is laterally displaced by a Stokes drag force to an off-axis equilibrium position. The rotation results from an optical torque pointing along the direction opposite to the vortex beam angular momentum. We fit the rotation angle data for different Laguerre-Gaussian modes taking the radius as a fitting parameter in the Mie-Debye theory of optical tweezers. We also discuss how micron-sized beads can be used as probes for optical aberrations introduced by the experimental setup.
description: 11 pages, 5 figures
Interbank Credit and the Money Manufacturing Process. A Systemic Perspective on Financial Stability
Creators: name: Biondi, Yuri
name: Zhou, Feng
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Finance (q-fin.GN)
subject: General Economics (econ.GN)
subject: Physics and Society (physics.soc-ph)
subject: Risk Management (q-fin.RM)
subject: FOS: Economics and business
subject: FOS: Physical sciences
subject: I.2.11
subject: 37Fxx, 34C28

description: Interbank lending and borrowing occur when financial institutions seek to settle and refinance their mutual positions over time and circumstances. This interactive process involves money creation at the aggregate level. Coordination mismatch on interbank credit may trigger systemic crises. This happened when, since summer 2007, interbank credit coordination did not longer work smoothly across financial institutions, eventually requiring exceptional monetary policies by central banks, and guarantee and bailout interventions by governments. Our article develops an interacting heterogeneous agents-based model of interbank credit coordination under minimal institutions. First, we explore the link between interbank credit coordination and the money generation process. Contrary to received understanding, interbank credit has the capacity to make the monetary system unbound. Second, we develop simulation analysis on imperfect interbank credit coordination, studying impact of interbank dynamics on financial stability and resilience at individual and aggregate levels. Systemically destabilizing forces prove to be related to the working of the banking system over time, especially interbank coordination conditions and circumstances.
Variable protostellar mass accretion rates in cloud cores
Creators: name: Gao, Yang
name: Lou, Yu-Qing
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Spherical hydrodynamic models with a polytropic equation of state (EoS) for forming protostars are revisited in order to investigate the so-called luminosity conundrum highlighted by observations. For a molecular cloud (MC) core with such an EoS with polytropic index $γ$ >1, the central mass accretion rate (MAR) decreases with increasing time as a protostar emerges, offering a sensible solution to this luminosity problem. As the MAR decreases, the protostellar luminosity also decreases, meaning that it is invalid to infer the star formation time from the currently observed luminosity using an isothermal model. Furthermore, observations of radial density profiles and the radio continua of numerous MC cores evolving towards protostars also suggest that polytropic dynamic spheres of $γ$ > 1 should be used in physical models.
description: 5 pages, MNRAS 466 L53 (2017)
Isolate record for VAFB-ISO-243
Creators: name: McClure, Maggie
Year: 1986
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Metal
valueUri: https://core.tdar.org/browse/material-type/11/metal
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-243. The artifact is a round brass pipe valve cover; printed on top is : C.R.& Co.;J.M. Ro; No. 18: 1924.
Detection of co-orbital planets by combining transit and radial-velocity measurements
Creators: name: Leleu, Adrien
name: Robutel, Philippe
name: Correia, Alexandre C M
name: Lillo-Box, Jorge
Publisher: name: arXiv
Year: 2017
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Co-orbital planets have not yet been discovered, although they constitute a frequent by-product of planetary formation and evolution models. This lack may be due to observational biases, since the main detection methods are unable to spot co-orbital companions when they are small or near the Lagrangian equilibrium points. However, for a system with one known transiting planet (with mass $m_1$), we can detect a co-orbital companion (with mass $m_2$) by combining the time of mid-transit with the radial-velocity data of the star. Here, we propose a simple method that allows the detection of co-orbital companions, valid for eccentric orbits, that relies on a single parameter $α$, which is proportional to the mass ratio $m_2/m_1$. Therefore, when $α$ is statistically different from zero, we have a strong candidate to harbour a co-orbital companion. We also discuss the relevance of false positives generated by different planetary configurations.
Higher-Order Cellular Automata Generated Symmetry-Protected Topological Phases and Detection Through Multi-Point Strange Correlators
Creators: name: Zhang, Jie-Yu
name: Li, Meng-Yuan
name: Ye, Peng
Publisher: name: arXiv
Year: 2024
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In computer and system sciences, higher-order cellular automata (HOCA) are a type of cellular automata that evolve over multiple time steps and generate complex patterns, which have various applications such as secret sharing schemes, data compression, and image encryption. In this paper, we introduce HOCA to quantum many-body physics and construct a series of symmetry-protected topological (SPT) phases of matter, in which symmetries are supported on a great variety of subsystems embbeded in the SPT bulk. We call these phases HOCA-generated SPT (HGSPT) phases. Specifically, we show that HOCA can generate not only well-understood SPTs with symmetries supported on either regular (e.g., line-like subsystems in the 2D cluster model) or fractal subsystems, but also a large class of unexplored SPTs with symmetries supported on more choices of subsystems. One example is \textit{mixed-subsystem SPT} that has either fractal and line-like subsystem symmetries simultaneously or two distinct types of fractal symmetries simultaneously. Another example is \textit{chaotic-subsystem SPT} in which chaotic-looking symmetries are significantly different from and thus cannot reduce to fractal or regular subsystem symmetries. We also introduce a new notation system to characterize HGSPTs. We prove that all possible subsystem symmetries in square lattice can be locally simulated by an HOCA generated symmetry. As the usual two-point strange correlators are trivial in most HGSPTs, we find that the nontrivial SPT orders can be detected by what we call \textit{multi-point strange correlators}. We propose a universal procedure to design the spatial configuration of the multi-point strange correlators for a given HGSPT phase. Specifically, we find deep connections between multi-point strange correlators and the spurious topological entanglement entropy (STEE), both exhibiting long range behavior in SRE states.
description: Accepted by PRX Quantum
Structure of Exotic Nuclei: A Theoretical Review
Creators: name: Zhou, Shan-Gui
Publisher: name: arXiv
Year: 2017
Subjects: subject: Nuclear Theory (nucl-th)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The study of exotic nuclei---nuclei with the ratio of neutron number $N$ to proton number $Z$ deviating much from that of those found in nature---is at the forefront of nuclear physics research because it can not only reveal novel nuclear properties and thus enrich our knowledge of atomic nuclei, but also help us to understand the origin of chemical elements in the nucleosynthesis. With the development of radioactive ion beam facilities around the world, more and more unstable nuclei become experimentally accessible. Many exotic nuclear phenomena have been observed or predicted in nuclei far from the $β$-stability line, such as neutron or proton halos, the shell evolution and changes of nuclear magic numbers, the island of inversion, soft-dipole excitations, clustering effects, new radioactivities, giant neutron halos, the shape decoupling between core and valence nucleons in deformed halo nuclei, etc. In this contribution, I will present a review of theoretical study of exotic nuclear structure. I will first introduce characteristic features and new physics connected with exotic nuclear phenomena: the weakly-bound feature, the large-spatial extension in halo nuclei, deformation effects in halo nuclei, the shell evolution, new radioactivities and clustering effects. Then I will highlight some recent progresses corresponding to these features.
description: 11 pages, 2 figures; plenary talk given at the 26th International Nuclear Physics Conference (INPC2016), Sep. 11-16, 2016, Adelaide, Australia
asimulation: Domain formation and impact on observables in resolved cosmological simulations of the (a)symmetron
Creators: name: Christiansen, Øyvind
name: Hassani, Farbod
name: Mota, David F.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The symmetron is a dark energy and dark matter candidate that forms topological defects in the late-time universe and holds the promise of resolving some of the cosmological tensions. We performed high-resolution simulations of the dynamical and non-linear (a)symmetron using the recently developed relativistic N-body code asevolution. By extensively testing the temporal and spatial convergence of domain decompositioning and domain wall stability, we determined criteria and physical intuition for the convergence. We applied the resolution criteria to run five high-resolution simulations with 1280^3 grids and a box size of 500 Mpc/h of the (a)symmetron. We considered the behaviour of the scalar field and the domain walls in each scenario. We find the effect on the matter power spectra, the HMFs, and observables computed over the past light cone of an observer, such as the integrated Sachs-Wolfe and non-linear Rees-Sciama effect and the lensing, compared to LCDM. We show local oscillations of the fifth force strength and the formation of planar structures in the density field. The dynamics of the field was visualised in animations with high resolution in time. The simulation code is made publicly available.
description: 24 pages, 27 figures. Supplementary material and videos may be found at https://oyvindchristiansen.com/projects/symmetron_resolve . The code is available at https://github.com/oyvach/asevolution
Isolate record for VAFB-ISO-210
Creators: name: Holloway, Corinne
Year: 1991
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-210. The artifact is a brown and white banded Monterey chert flake with a cortex (one side is completely cortex).
Isolate record for VAFB-ISO-238
Creators: name: McClure, Maggie
Year: 1992
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Hammerstone
valueUri: https://core.tdar.org/browse/other-keyword/5939/hammerstone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-238. The artifact is one quartzite hammerstone.
Isolate record for VAFB-ISO-241
Creators: name: McClure, Maggie
Year: 1986
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Hammerstone
valueUri: https://core.tdar.org/browse/other-keyword/5939/hammerstone
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-241. The artifact is a white-gray chert core/hammerstone, utilized on one end.
Discovery of Intrinsic Quantum Anomalous Hall Effect in Organic Mn-DCA Lattice
Creators: name: Wang, Ya-ping
name: Ji, Wei-xiao
name: Zhang, Chang-wen
name: Li, Ping
name: Wang, Pei-ji
name: Kong, Biao
name: Li, Sheng-shi
name: Yan, Shi-shen
name: Liang, Kang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The quantum anomalous Hall (QAH) phase is a novel topological state of matter characterized by a nonzero quantized Hall conductivity without an external magnetic field. The realizations of QAH effect, however, are experimentally challengeable. Based on ab initio calculations, here we propose an intrinsic QAH phase in DCA Kagome lattice. The nontrivial topology in Kagome bands are confirmed by the nonzero chern number, quantized Hall conductivity, and gapless chiral edge states of Mn-DCA lattice. A tight-binding (TB) model is further constructed to clarify the origin of QAH effect. Furthermore, its Curie temperature, estimated to be ~ 253 K using Monte-Carlo simulation, is comparable with room temperature and higher than most of two-dimensional ferromagnetic thin films. Our findings present a reliable material platform for the observation of QAH effect in covalent-organic frameworks.
description: 9 pages,4 figures
Isolate record for VAFB-ISO-221
Creators: name: Holloway, Corinne
Year: 1993
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-221. The artifact is a Monterey chert flake with a cortex.
Rational Maximum Likelihood Estimators of Kronecker Covariance Matrices
Creators: name: Drton, Mathias
name: Grosdos, Alexandros
name: McCormack, Andrew
Publisher: name: arXiv
Year: 2024
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62R01

description: As is the case for many curved exponential families, the computation of maximum likelihood estimates in a multivariate normal model with a Kronecker covariance structure is typically carried out with an iterative algorithm, specifically, a block-coordinate ascent algorithm. In this article we highlight a setting, specified by a coprime relationship between the sample size and dimension of the Kronecker factors, where the likelihood equations have algebraic degree one and an explicit, easy-to-evaluate rational formula for the maximum likelihood estimator can be found. A partial converse of this result is provided that shows that outside of the aforementioned special setting and for large sample sizes, examples of data sets can be constructed for which the degree of the likelihood equations is larger than one.
description: 16 pages, 2 tables
Barjols, vallon des Carmes, grand oratoire de saint Marcel
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2024

Abstract
Isolate record for VAFB-ISO-246
Creators: name: McClure, Maggie
Year: 1989
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-246. The artifact is a white chert flake.
The tessellation problem of quantum walks
Creators: name: Abreu, A.
name: Cunha, L.
name: Fernandes, T.
name: de Figueiredo, C.
name: Kowada, L.
name: Marquezino, F.
name: Posner, D.
name: Portugal, R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Discrete Mathematics (cs.DM)
subject: Computational Complexity (cs.CC)
subject: Combinatorics (math.CO)
subject: Quantum Physics (quant-ph)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Quantum walks have received a great deal of attention recently because they can be used to develop new quantum algorithms and to simulate interesting quantum systems. In this work, we focus on a model called staggered quantum walk, which employs advanced ideas of graph theory and has the advantage of including the most important instances of other discrete-time models. The evolution operator of the staggered model is obtained from a tessellation cover, which is defined in terms of a set of partitions of the graph into cliques. It is important to establish the minimum number of tessellations required in a tessellation cover, and what classes of graphs admit a small number of tessellations. We describe two main results: (1) infinite classes of graphs where we relate the chromatic number of the clique graph to the minimum number of tessellations required in a tessellation cover, and (2) the problem of deciding whether a graph is $k$-tessellable for $k\ge 3$ is NP-complete.
description: 10 pages, 7 figs
Isolate record for VAFB-ISO-229
Creators: name: Holloway, Corinne
Year: 1994
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Chipped Stone
valueUri: https://core.tdar.org/browse/material-type/2/chipped-stone
subject: Chert
valueUri: https://core.tdar.org/browse/material-type/213/chert
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-229. The artifact is a questionable orange and tan banded Monterey chert secondary flake. The artifact measures 5.7 cm by 5.8 cm by 1.4 cm.
Shell topology optimization based on level set method
Creators: name: Kobayashi, Hiroki
name: Nomura, Katsuya
name: Zhou, Yuqing
name: Tanaka, Masato
name: Kawamoto, Atsushi
name: Nomura, Tsuyoshi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: This paper proposes a level set-based method for optimizing shell structures with large design changes in shape and topology. Conventional shell optimization methods, whether parametric or nonparametric, often only allow limited design changes in shape. In the proposed method, the shell structure is defined as the isosurface of a level set function. The level set function is iteratively updated based on the shape sensitivity on the surface mesh. Therefore, the proposed method can represent an arbitrary manifold surface while dealing with topological changes, for example, from a spherical surface to a toroidal surface. We applied the proposed method to the mean compliance minimization problems of 3D shell structural designs for dome, bending plate and cantilever beam examples to demonstrate its efficacy of the proposed method.
description: 15 pages, 13 figures
Amazing_The_Sum_of_Positive_and_Negative_Prime_Numbers_Are_Equal (1).pdf
Creators: name: u zaman, budee
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 490401
subject: Algebra and number theory

description: This paper unveils a profound equation that harnesses the power ofnatural numbers to establish a captivating theorem: the balance betweenpositive and negative prime numbers’ summation, intricately linkedthrough the medium of natural numbers. As a corollary, the essence ofnatural numbers emerges as a testament to the harmonious interplay betweeneven and odd elements. Notably, we expose the remarkable revelationthat odd numbers find expression as both the aggregate of primedivisors and the sum of prime numbers, fusing diverse mathematical conceptsinto an elegant unity. This work reshapes the landscape of numbertheory, illuminating the hidden connections between primes, naturals, andtheir arithmetical compositions
[ARTICLE] Extended Pythagoras Theorem Using Hexagons [Canadian Journal of Mathematics Research / 2021]
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 490402
subject: Algebraic and differential geometry
classificationCode: 490499
subject: Pure mathematics not elsewhere classified
classificationCode: 490411
subject: Real and complex functions (incl. several variables)

description: This article presents a new variant of the Pythagorean theorem using hexagons instead of squares. It was first published in 2021 on the Canadian Journal of Mathematics Research under a Creative Commons Attribution 4.0 International License (CC-BY 4.0) - see reference at bottom for original source - and, it is made available again here to the benefit of all that might be interested in such a topic.
A video is also available (at Figshare) showing the dynamics of the extended Pythagoras theorem using hexagons for varying sides of the 60-degree-angled triangle (the link is also provided below to the benefit of those who may be interested in exploring more).

****************************************************************************************************ABSTRACTThis article provides the geometric and algebraic proof of the variant equation of the Pythagorean theorem x2-xy+y2=z2. The hypothesis that will be proven is that just as squares govern the original version x2+y2=z2, hexagons are found to govern x2-xy+y2=z2. Both the special case x equal to y, and the general case of x different from y, are examined.

-------------------------------------------------------------------------For more public data, please visit my Figshare profile: https://figshare.com/authors/Luis_Teia/10811244
Information sur les instruments de vacarme de Jeudi Saint. Aloès et sifflets
Creators: name: Musée National Des Arts Et Traditions Populaires (Paris)
name: Centre D'ethnologie Française
Publisher: name: École des Hautes Études en Sciences Sociales; Institut  interdisciplinaire d'anthropologie du contemporain (Paris); Laboratoire d'anthropologie et d'histoire de l'institution de la culture (Paris)
Year: 2022

Abstract
Machine Learning for Shipwreck Segmentation from Side Scan Sonar Imagery: Dataset and Benchmark
Creators: name: Sethuraman, Advaith V.
name: Sheppard, Anja
name: Bagoren, Onur
name: Pinnow, Christopher
name: Anderson, Jamey
name: Havens, Timothy C.
name: Skinner, Katherine A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Open-source benchmark datasets have been a critical component for advancing machine learning for robot perception in terrestrial applications. Benchmark datasets enable the widespread development of state-of-the-art machine learning methods, which require large datasets for training, validation, and thorough comparison to competing approaches. Underwater environments impose several operational challenges that hinder efforts to collect large benchmark datasets for marine robot perception. Furthermore, a low abundance of targets of interest relative to the size of the search space leads to increased time and cost required to collect useful datasets for a specific task. As a result, there is limited availability of labeled benchmark datasets for underwater applications. We present the AI4Shipwrecks dataset, which consists of 28 distinct shipwrecks totaling 286 high-resolution labeled side scan sonar images to advance the state-of-the-art in autonomous sonar image understanding. We leverage the unique abundance of targets in Thunder Bay National Marine Sanctuary in Lake Huron, MI, to collect and compile a sonar imagery benchmark dataset through surveys with an autonomous underwater vehicle (AUV). We consulted with expert marine archaeologists for the labeling of robotically gathered data. We then leverage this dataset to perform benchmark experiments for comparison of state-of-the-art supervised segmentation methods, and we present insights on opportunities and open challenges for the field. The dataset and benchmarking tools will be released as an open-source benchmark dataset to spur innovation in machine learning for Great Lakes and ocean exploration. The dataset and accompanying software are available at https://umfieldrobotics.github.io/ai4shipwrecks/.
description: Project website link: https://umfieldrobotics.github.io/ai4shipwrecks/
[ARTICLE] Extended Pythagoras Theorem Using Hexagons [Canadian Journal of Mathematics Research / 2021]
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 490402
subject: Algebraic and differential geometry
classificationCode: 490499
subject: Pure mathematics not elsewhere classified
classificationCode: 490411
subject: Real and complex functions (incl. several variables)

description: This article presents a new variant of the Pythagorean theorem using hexagons instead of squares. It was first published in 2021 on the Canadian Journal of Mathematics Research under a Creative Commons Attribution 4.0 International License (CC-BY 4.0) - see reference at bottom for original source - and, it is made available again here to the benefit of all that might be interested in such a topic.
A video is also available (at Figshare) showing the dynamics of the extended Pythagoras theorem using hexagons for varying sides of the 60-degree-angled triangle (the link is also provided below to the benefit of those who may be interested in exploring more).

****************************************************************************************************ABSTRACTThis article provides the geometric and algebraic proof of the variant equation of the Pythagorean theorem x2-xy+y2=z2. The hypothesis that will be proven is that just as squares govern the original version x2+y2=z2, hexagons are found to govern x2-xy+y2=z2. Both the special case x equal to y, and the general case of x different from y, are examined.
Isolate record for VAFB-ISO-213
Creators: name: Holloway, Corinne
Year: 1991
Subjects: subject: Santa Barbara (County)
valueUri: https://core.tdar.org/browse/geographic-keyword/3486/santa-barbara-county
subject: Vandenberg Air Force Base (VAFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85469/vandenberg-air-force-base-vafb
subject: Vandenberg Space Force Base (VSFB)
valueUri: https://core.tdar.org/browse/geographic-keyword/85584/vandenberg-space-force-base-vsfb
subject: California (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/1484/california-state-territory
subject: Shell
valueUri: https://core.tdar.org/browse/material-type/14/shell
subject: Reconnaissance / Survey
valueUri: https://core.tdar.org/browse/investigation-type/7/reconnaissance-survey

description: This document is the isolated find record for VAFB-ISO-213. The artifact is a single whole Haliotis cracherodii shell with exfoliating nacre. Small amounts of bleached mammal bone (six fragments noted).
[ARTICLE] New Calculator Design for Efficient Interface based on the Circular Group Approach [American The Journal of Open Engineering 2021]
Creators: name: Teia, Luis
Publisher: name: figshare
Year: 2022
Subjects: classificationCode: 400905
subject: Electronic instrumentation
classificationCode: 400902
subject: Digital electronic devices
classificationCode: 400904
subject: Electronic device and system performance evaluation, testing and simulation
classificationCode: 401002
subject: Engineering education
classificationCode: 401001
subject: Engineering design
classificationCode: 401099
subject: Engineering practice and education not elsewhere classified
classificationCode: 409902
subject: Engineering instrumentation
classificationCode: 409999
subject: Other engineering not elsewhere classified

description: Next generation calculators need to be efficient in all their design aspects. Current advanced computation calculators lack an efficient human-machine interface, with its unchanged traditional design traced back to the early 1960’s electro-mechanical commercialized solutions. The present article highlights how the perceived safety of “designing by tradition” can actually prevent evolution, and proposes - in a logical and argumentative way - a new layout based on the circular group approach, which derives from various already successful and working systems operating in society. Numerical comparison of the time spent in computing between the classical matrix calculator layout and the new circular group approach have shown that substantial time-saving can be achieved, in addition to the calculation acceleration effect imparted by aligning the highly organized calculator design with the intuitive nature of the mind of the user. Ultimately, the importance of such an advancement is appreciated when considering the compounding time-saving effect on the millions of users that will spend hours operating calculators in the years to come.
This article was first published in 2021 on The Journal of Open Engineering under a Creative Commons Attribution 4.0 International License (CC-BY 4.0) - see reference at bottom for original source - and is here made available to the benefit of all that might be interested in such a topic.-------------------------------------------------------------------------For more public data, please visit my Figshare profile: https://figshare.com/authors/Luis_Teia/10811244
A partially occulting MACHO-microlensing event in the Twin Quasar Q0957+561
Creators: name: Nieuwenhuizen, Theodorus M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: A doubly-peaked quasar microlensing event in the lensed Twin Quasar Q0957+561 A,B (Colley and Schild 2003) is analysed within several lensing models. In the most realistic model a lens resolves in image B the ellipse shaped, bright inner rim of the quasar's accretion disk, intersecting it twice. This lens weighs 0.5 Earth mass and is located inside the Galaxy, at 3 kpc distance. During the passing, it partially occults the source, which allows to describe it as a primordial gas cloud of 1.4 Solar radius and 17 K temperature, in accordance with the theory of Gravitational Hydrodynamics. Lensing by such objects against the Magellanic Clouds and Galactic centre will also lead to occultation dips.
description: 8 pages revtex, to appear in Fortschritte der Physik
Unrecognizable Yet Identifiable: Image Distortion with Preserved Embeddings
Creators: name: Zakharov, Dmytro
name: Kuznetsov, Oleksandr
name: Frontoni, Emanuele
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Biometric authentication systems play a crucial role in modern security systems. However, maintaining the balance of privacy and integrity of stored biometrics derivative data while achieving high recognition accuracy is often challenging. Addressing this issue, we introduce an innovative image transformation technique that effectively renders facial images unrecognizable to the eye while maintaining their identifiability by neural network models, which allows the distorted photo version to be stored for further verification. While initially intended for biometrics systems, the proposed methodology can be used in various artificial intelligence applications to distort the visual data and keep the derived features close. By experimenting with widely used datasets LFW and MNIST, we show that it is possible to build the distortion that changes the image content by more than 70% while maintaining the same recognition accuracy. We compare our method with previously state-of-the-art approaches. We publically release the source code.
N4W7
Creators: name: Shanks, Thomas
Year: 2024
Subjects: subject: Mesoamerica
valueUri: https://core.tdar.org/browse/geographic-keyword/61/mesoamerica
subject: Basin of Mexico
valueUri: https://core.tdar.org/browse/geographic-keyword/3/basin-of-mexico
subject: Mexico
valueUri: https://core.tdar.org/browse/geographic-keyword/134/mexico
subject: Mexico (State / Territory)
valueUri: https://core.tdar.org/browse/geographic-keyword/326/mexico-state-territory
subject: United Mexican States (Country)
valueUri: https://core.tdar.org/browse/geographic-keyword/438/united-mexican-states-country
subject: Central Mexico, Teotihuacan Valley
valueUri: https://core.tdar.org/browse/geographic-keyword/7/central-mexico-teotihuacan-valley
subject: Central Mexico
valueUri: https://core.tdar.org/browse/geographic-keyword/135/central-mexico
subject: Teotihuacan Valley
valueUri: https://core.tdar.org/browse/geographic-keyword/154/teotihuacan-valley
subject: Teotihuacan
valueUri: https://core.tdar.org/browse/geographic-keyword/202/teotihuacan
subject: Valley of Mexico
valueUri: https://core.tdar.org/browse/geographic-keyword/44/valley-of-mexico
subject: Classic Period
valueUri: https://core.tdar.org/browse/temporal-keyword/125/classic-period
subject: Terminal Formative
valueUri: https://core.tdar.org/browse/temporal-keyword/67/terminal-formative
subject: Teotihuacan Period
valueUri: https://core.tdar.org/browse/temporal-keyword/7765/teotihuacan-period
subject: Early Classic
valueUri: https://core.tdar.org/browse/temporal-keyword/5560/early-classic
subject: Teotihuacan
valueUri: https://core.tdar.org/browse/culture-keyword/7527/teotihuacan
subject: Teotihuacano
valueUri: https://core.tdar.org/browse/culture-keyword/9224/teotihuacano
subject: Teotihuacan
valueUri: https://core.tdar.org/browse/site-name/92/teotihuacan
subject: Town / City
valueUri: https://core.tdar.org/browse/site-type/255/town-city
subject: Domestic Structure or Architectural Complex
valueUri: https://core.tdar.org/browse/site-type/251/domestic-structure-or-architectural-complex
subject: Settlements
valueUri: https://core.tdar.org/browse/site-type/252/settlements
subject: Systematic Survey
valueUri: https://core.tdar.org/browse/investigation-type/12/systematic-survey

description: Site Survey Form Scan for Square N4W7
Entanglement Entropy of ($\mathbf{2+1}$)-Dimensional SU(2) Lattice Gauge Theory on Plaquette Chains
Creators: name: Ebner, Lukas
name: Schäfer, Andreas
name: Seidl, Clemens
name: Müller, Berndt
name: Yao, Xiaojun
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the entanglement entropy of Hamiltonian SU(2) lattice gauge theory in $2+1$ dimensions on linear plaquette chains and show that the entanglement entropies of both ground and excited states follow Page curves. The transition of the subsystem size dependence of the entanglement entropy from the area law for the ground state to the volume law for highly excited states is found to be described by a universal crossover function. Quantum many-body scars in the middle of the spectrum, which are present in the electric flux truncated Hilbert space, where the gauge theory can be mapped onto an Ising model, disappear when higher electric field representations are included in the Hilbert space basis. This suggests the continuum $(2+1)$-dimensional SU(2) gauge theory does not have such scarred states.
description: 14 pages, 16 figures; v2: update the discussions of area-volume transition and scars; v3: published version; v4: corrected a typo in the legend of Fig.7