Results 21 to 30 of about 3,121,672 (301)

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

Revista 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, Carlos José Caetano Bacha   +1 more
doaj   +1 more source

Clustering‐Induced White Light Emission from Carbonized Polymer Dots

Advanced 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, Zheng Chen, Bo Chu, Ya-Ling Wang, Ning Li, Huinian Zhang, Yongzhen Yang, Shengliang Hu, Xing-Hong Zhang   +8 more
doaj   +1 more source

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

Sensors, 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, Ghofrane Fersi, Robert Fromm, Faouzi Derbel   +3 more
doaj   +1 more source

A census of ultra-compact dwarf galaxies in nearby galaxy clusters [PDF]

, 2010
Ultra-compact dwarf galaxies (UCDs) are predominatly found in the cores of nearby galaxy clusters. Besides the Fornax and Virgo cluster, UCDs have also been confirmed in the twice as distant Hydra I and Centaurus clusters.
Bekki, Côté, Dabringhausen, Drinkwater, Fellhauer, Harris, Hasegan, Hilker, Jones, Jordán, Lotz, M. Hilker, Mieske, Mieske, Mieske, Mieske, Misgeld, Misgeld, Peng, Phillipps, Schuberth   +20 more
core   +2 more sources

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

Journal 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, Barbara Gilic, Petra Rajkovic Vuletic, Vladimir Pavlinovic, Natasa Zenic   +4 more
doaj   +1 more source

Mass accretion rates of clusters of galaxies: CIRS and HeCS

, 2021
We use a new spherical accretion recipe tested on N-body simulations to measure the observed mass accretion rate (MAR) of 129 clusters in the Cluster Infall Regions in the Sloan Digital Sky Survey (CIRS) and in the Hectospec Cluster Survey (HeCS).
Baldi, M., De Boni, C., Di Gioia, S., Diaferio, A., Geller, M. J., Pizzardo, M., Rines, K., Serra, A. L., Sohn, J.   +8 more
core   +1 more source

Hyper-Cross-Linked Polystyrene as a Stabilizing Medium for Small Metal Clusters

Molecules, 2021
Among different polymers nanostructured cross-linked aromatics have the greatest potential as catalytic supports due to their exceptional thermal and chemical stability and preservation of the active phase morphology.
Alexey V. Bykov, Galina N. Demidenko, Linda Zh. Nikoshvili, Lioubov Kiwi-Minsker   +3 more
doaj   +1 more source

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

Annals 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, Mayada Mohammad Samkari, Mona A. Althobaiti, Bashaer Ruddah Al-Ahmadi, Alaa Mohammed Bugis, Amjad Mohammed Bugis, Fatimah Yaseen Sabbagh, Somaya A. Althobaiti, Amro S. Bukari, Safenaz Meshal Alqurashi, Hana Abdullah Mshrai, Omar Ahmed Abdelwahab   +11 more
doaj   +1 more source

NH₃ Sensor Based on rGO-PANI Composite with Improved Sensitivity

Sensors, 2021
This work reports on a reduced graphene oxide and poly(aniline) composite (rGO-PANI), with rGO clusters inserted between PANI chains. These clusters were formed due the plasticizing effect of N-methyl-2-pyrrolidone (NMP) solvent, which was added during ...
Fabio Seiti Hadano, Anderson Emanuel Ximim Gavim, Josiani Cristina Stefanelo, Sara Luiza Gusso, Andreia Gerniski Macedo, Paula Cristina Rodrigues, Abd. Rashid bin Mohd Yusoff, Fabio Kurt Schneider, Jeferson Ferreira de Deus, Wilson José da Silva   +9 more
doaj   +1 more source

Dynamics of metal clusters in rare gas clusters

, 2007
We investigate the dynamics of Na clusters embedded in Ar matrices. We use a hierarchical approach, accounting microscopically for the cluster's degrees of freedom and more coarsely for the matrix.
Andrae K., E. SURAUD, Ekardt W., F. FEHRER, Fehrer F., G. BOUSQUET, Haberland H., Haberland H., Kreibig U., M. BAER, Nasluzov A., P. M. DINH, P.-G. REINHARD   +12 more
core   +3 more sources