Results 131 to 140 of about 12,537 (310)

Geodesic ball packings in $\mathbf{H}^2\!\times\!\mathbf{R}$ space for generalized Coxeter space groups

open access: yes, 2012
After having investigated the geodesic ball packings in $\mathbf{S}^2\!\times\!\mathbf{R}$ space we consider the analogous problem in $\mathbf{H}^2\!\times\!\mathbf{R}$ space from among the eight Thurston geometries.
Szirmai, Jenő, Jenő Szirmai
core  

Geodesic spheres and Jacobi vector fields on Sasakian space forms

open access: yes, 1987
SynopsisUsing explicit equations for Jacobi vector fields on a Sasakian space form, we characterise such spaces by means of the shape operator of small geodesic spheres.
Lieven Vanhecke, David E. Blair
core   +1 more source

A Threat‐Scoring Framework Using Crowdsourced Data Indicates High Threat Levels in Fossorial Shieldtail Snakes

open access: yesAnimal Conservation, EarlyView.
Reliable estimates of species distributions are crucial for understanding their conservation needs. Yet for many species, IUCN largely relies on expert‐drawn ranges, which are often inaccurate. Focusing on shieldtail snakes in peninsular India, we combined citizen science, literature, field, and museum records to create improved distribution maps for ...
Anuj Shinde   +3 more
wiley   +1 more source

CEVA, MENELAUS AND STEWART THEOREMS FOR GEODESIC TRIANGLES ON THE HYPERBOLIC UNIT SPHERE

open access: yesSüleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009
: In this study, we give Ceva, Menelaus and Stewart Theorems for geodesic triangles on the hyperbolic unit sphere . Keywords: Geodesic triangle, Lorentz space, timelike vector.
Mehmet ÖNDER
doaj  

Navigating the Flames: Comparative Analysis of Cremation Practices in the Roman and Early Medieval Periods at Gbely‐Kojatín (SK) and Přítluky (CZ)

open access: yesArchaeometry, EarlyView.
ABSTRACT Cremation became the dominant funerary practice in the Middle Danube Region during the Roman Period (RP) (1st–4th century) and reappeared in the Early Medieval Ages (EMA) (6th/7th–8th century). This study aims to reconstruct differences in cremation conditions from the Gbely‐Kojatín site (Slovakia, RP and EMA) and the Přítluky site (Czech ...
Katarína Hladíková   +4 more
wiley   +1 more source

On Pseudospherical Smarandache Curves in Minkowski 3-Space

open access: yesJournal of Applied Mathematics, 2014
In this paper we define nonnull and null pseudospherical Smarandache curves according to the Sabban frame of a spacelike curve lying on pseudosphere in Minkowski 3-space. We obtain the geodesic curvature and the expressions for the Sabban frame’s vectors
Esra Betul Koc Ozturk   +3 more
doaj   +1 more source

Automating Archaeological Discovery: Assessing Geospatial Artificial Intelligence (GeoAI) Tools for Stone Wall Identification in Kweneng, South Africa

open access: yesArchaeometry, EarlyView.
ABSTRACT The discovery of archaeological sites traditionally entails the utilisation of physically demanding exploration methodologies, including terrain surveying and the analysis of historical records. Recent technological developments have led to an increased use of non‐invasive remote sensing techniques, including Google Earth, LiDAR and aerial ...
Mncedisi J. Siteleki
wiley   +1 more source

Almost starshaped CMC hypersurfaces in space forms are geodesic spheres

open access: yes
We prove that a constant mean curvature hypersurface of a simply connected real space form which is almost starshaped is a geodesic ...
Roth, Julien
core   +2 more sources

Approximating the smallest $k$-enclosing geodesic disc in a simple polygon

open access: yesJournal of Computational Geometry
We consider the problem of finding a geodesic disc of smallest radius containing at least $k$ points from a set of $n$ points in a simple polygon that has $m$ vertices, $r$ of which are reflex vertices. We refer to such a disc as a SKEG disc. We present
Prosenjit Bose   +2 more
doaj   +1 more source

A tutorial on Bayesian model averaging for exponential random graph models

open access: yesBritish Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The use of exponential random graph models (ERGMs) is becoming prevalent in psychology due to their ability to explain and predict the formation of edges between vertices in a network. Valid inference with ERGMs requires correctly specifying endogenous and exogenous effects as network statistics, guided by theory, to represent the network ...
Ihnwhi Heo   +2 more
wiley   +1 more source

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