Results 21 to 30 of about 5,122,542 (341)
The Non-Uniform k-Center Problem [PDF]
, 2016 In this paper, we introduce and study the Non-Uniform k-Center problem (NUkC). Given a finite metric space $(X,d)$ and a collection of balls of radii $\{r_1\geq \cdots \ge r_k\}$, the NUkC problem is to find a placement of their centers on the metric ...
Chakrabarty, Deeparnab +2 more
core +2 more sources
Heavy neutrino ball as a possible solution to the "blackness problem" of the Galactic center [PDF]
, 1998 It has been recently shown (Tsiklauri & Viollier, 1998a) that the matter concentration inferred from observed stellar motion at the galactic center (Eckart & Genzel, 1997, MNRAS, 284, 576 and Genzel et al., 1996, ApJ, 472, 153) is consistent with a ...
Backer +40 more
core +3 more sources
Frontiers in Psychiatry, 2018 Aims: This study aimed to investigate in a gender-sensitive manner factors related to at-risk/problematic Internet use (ARPIU) in a sample of young Korean adolescents.
Yoon-Jung Kim +9 more
doaj +1 more source
Frontiers in Psychiatry, 2022 BackgroundAggression is common among individuals with methamphetamine use disorder (MAUD) and constitutes a serious public health issue. The current study aimed to examine associations of methamphetamine-use characteristics and childhood trauma with ...
Mengqi Liu +17 more
doaj +1 more source
Prevalence of dementia in a level 4 university epilepsy center: how big is the problem?
Frontiers in Neurology, 2023 BackgroundThe relationship between epilepsy and dementia is currently a topic of great interest. Our study aimed to determine the prevalence of dementia diagnoses among patients of a large level 4 university epilepsy center.MethodsIn this retrospective ...
Christoph Helmstaedter +3 more
doaj +1 more source
Non-integrability of the spacial n-center problem [PDF]
Journal of Differential Equations, 2018 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +1 more source
A Constant Approximation for Colorful k-Center [PDF]
, 2019 In this paper, we consider the colorful k-center problem, which is a generalization of the well-known k-center problem. Here, we are given red and blue points in a metric space, and a coverage requirement for each color.
Bandyapadhyay, Sayan +3 more
core +2 more sources
Constant Factor Approximation for Capacitated k-Center with Outliers [PDF]
, 2014 The $k$-center problem is a classic facility location problem, where given an edge-weighted graph $G = (V,E)$ one is to find a subset of $k$ vertices $S$, such that each vertex in $V$ is "close" to some vertex in $S$.
Cygan, Marek, Kociumaka, Tomasz
core +2 more sources
Long‐term Caspian Sea level change
Geophysical Research Letters, 2017 Caspian Sea level (CSL) has undergone substantial fluctuations during the past several hundred years. The causes over the entire historical period are uncertain, but we investigate here large changes seen in the past several decades. We use climate model‐
J. L. Chen +6 more
doaj +1 more source