Results 21 to 30 of about 1,758,281 (314)

Computer simulation of structure and dimensions of oxygen-octaadric clusters in lithium niobate crystal and the dynamics of their development with changes in composition [PDF]

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2017
The peculiarities of formation of energetically equilibrium dipole oxygen-octahedral clusters in the structure of a ferroelectric crystal of lithium niobate (LiNbO3) have been studied by computer simulation.
V.M. Voskresensky   +3 more
doaj   +1 more source

Recent advances in polyoxometalate-based lanthanide–oxo clusters

open access: yesPolyoxometalates, 2023
Polyoxometalate (POM)-based lanthanide-oxo clusters (LnOCs) are a class of polynuclear lanthanide–oxygen complexes formed by polyoxometalate stabilization through oxygen bridges in which POMs can be viewed as multidentate inorganic ligands.
Shu-Rong Li   +4 more
doaj   +1 more source

Word Sense Clustering and Clusterability [PDF]

open access: yesComputational Linguistics, 2016
Word sense disambiguation and the related field of automated word sense induction traditionally assume that the occurrences of a lemma can be partitioned into senses. But this seems to be a much easier task for some lemmas than others. Our work builds on recent work that proposes describing word meaning in a graded fashion rather than through a strict
Diana McCarthy   +2 more
openaire   +2 more sources

Clustering aggregation [PDF]

open access: yesACM Transactions on Knowledge Discovery from Data, 2005
We consider the following problem: given a set of clusterings, find a single clustering that agrees as much as possible with the input clusterings. This problem, clustering aggregation , appears naturally in various contexts.
Aristides Gionis   +2 more
openaire   +3 more sources

Clusters espaciais de “agriculturalização” no meio rural de alguns estados brasileiros

open access: yesRevista de Economia e Sociologia Rural, 2020
Resumo: O meio rural brasileiro tem se caracterizado, em especial nas últimas quatro décadas, pela diminuição da sua população, diminuição do total de pessoas ocupadas na agropecuária e pelo crescimento de atividades não agrícolas.
Alysson Luiz Stege   +1 more
doaj   +1 more source

Clustering‐Induced White Light Emission from Carbonized Polymer Dots

open access: yesAdvanced Photonics Research, 2021
Despite the advancements in synthetic methods, it is still challenging to prepare white light‐emitting carbon dots for solid‐state white light‐emitting diodes (LEDs). Herein, the synthesis and characterization of a carbonized polymer dot (CPD) that emits
Bin Liu   +8 more
doaj   +1 more source

Wake-Up Receiver-Based Routing for Clustered Multihop Wireless Sensor Networks

open access: yesSensors, 2022
The Wireless Sensor Network (WSN) is one of the most promising solutions for the supervision of multiple phenomena and for the digitisation of the Internet of Things (IoT).
Maximilian Weber   +3 more
doaj   +1 more source

Young, Massive Star Clusters in the Antennae [PDF]

open access: yes, 2008
While massive star clusters have been detected in almost every galaxy with appreciable star formation, they are most prevalent in interacting and merging galaxies. As many as 95% of these clusters will ultimately be disrupted, often in the first 10 Myr,
Christopher, Micol Huw
core   +1 more source

Diabetes mellitus and the risk of spontaneous bacterial peritonitis in patients with liver cirrhosis: a systematic review and meta-analysis

open access: yesAnnals of Saudi Medicine
BACKGROUND: Spontaneous bacterial peritonitis (SBP) represents a critical and potentially lethal condition that typically develops in individuals with liver cirrhosis.
Raghad Alhajaji   +11 more
doaj   +1 more source

Mediating Effects of the COVID-19 Pandemic on the Associations between Physical Activity and Physical Fitness; Cross-Sectional Study among High School Adolescents

open access: yesJournal of Functional Morphology and Kinesiology, 2023
The COVID-19 pandemic and the imposed social distancing measures caused negative changes in physical activity levels (PALs) and physical fitness (PF) among adolescents, but the potential mediating effect of the pandemic on the association between PAL and
Mirela Sunda   +4 more
doaj   +1 more source

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