Results 41 to 50 of about 5,269,237 (355)
g-Natural metrics on unit tangent sphere bundles via a Musso-Tricerri process [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 2010 E. Musso and F. Tricerri had given a process of construction of Riemannian metrics on tangent bundles and unit tangent bundles, over m-dimensional Riemannian manifolds (M, g), from some special quadratic forms an OM × R^m and OM, respectively, where OM ...
Mohamed Tahar Kadaoui Abbassi
doaj
New Standards for Measurement in Meridians & Acupoints by Taking the Size of Normal Male Legs
Journal of Pharmacopuncture, 2010 Objective : Standard of measurement in Korean Medicine has been changed in dynasty and location. Thus, cun (寸) and chi (尺) as unit of measurement for meridians and acupoints could be recognized as the length of equally divided portions of a certain long ...
Shin Jong Yu +6 more
doaj +1 more source
Completeness results for metrized rings and lattices [PDF]
Categories and General Algebraic Structures with Applications, 2019 The Boolean ring $B$ of measurable subsets of the unit interval, modulo sets of measure zero, has proper radical ideals (for example, $\{0\})$ that are closed under the natural metric, but has no prime ideal closed under that metric; hence closed radical
George Bergman
doaj +1 more source
$H$-contact unit tangent sphere bundles of Riemannian manifolds
, 2016 A contact metric manifold is said to be $H$-contact, if the characteristic vector field is harmonic. We prove that the unit tangent bundle of a Riemannian manifold $M$ equipped with the standard contact metric structure is $H$-contact if and only if $M ...
Nikolayevsky, Yuri, Park, Jeong Hyeong
core +1 more source
Kaleidoscopical graphs and semigroups [PDF]
Математичні Студії, 2011 We give a semigroup characterization of kaleidoscopical graphs. A connected graph Г (considered as a metric space with the path metric) is called kaleidoscopical if there is a vertex coloring of Г which is bijective on each unit ball.
K. D. Protasova
doaj
Theorizing Trikāla: A Generalized Intervallic Approach to Pulse Transformation in South Indian Carnatic Music [PDF]
Analytical Approaches to World Music, 2020 The rich rhythmic/metric construction of South Indian Carnatic music is characterized, in large part, by intricate interplay between an internalized metric cycle called the tāḷa and performed phrases that may generate expressive tension with this tāḷa ...
Wells, Robert
doaj
Natural Paracontact Magnetic Trajectories on Unit Tangent Bundles
Axioms, 2020 In this paper, we study natural paracontact magnetic trajectories in the unit tangent bundle, i.e., those that are associated to g-natural paracontact metric structures.
Mohamed Tahar Kadaoui Abbassi +1 more
doaj +1 more source
Population Ecology, EarlyView.We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva +6 more
wiley +1 more source
Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors
Population Ecology, EarlyView.Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley +1 more source
The biharmonic homotopy problem for unit vector fields on 2-tori
, 2018 The bienergy of smooth maps between Riemannian manifolds, when restricted to unit vector fields, yields two different variational problems depending on whether one takes the full functional or just the vertical contribution. Their critical points, called
Loubeau, E., Markellos, M.
core +2 more sources