Results 121 to 130 of about 55,131 (281)

Generation cycles in experimental populations of a multivoltine insect

Journal of Animal Ecology, EarlyView.
Although theory suggests various mechanisms by which environmental and ecological factors may drive generational fluctuations, our field‐cage experiment is the first to demonstrate how internal dynamics and external disturbances jointly produce synchronised, large‐scale outbreak cycles.
Takehiko Yamanaka, Yasushi Sato, William A. Nelson, Ottar N. Bjørnstad   +3 more
wiley   +1 more source

Examining the Effects of Synchronous Written Corrective Feedback During Computer‐Mediated Collaborative Writing: Feedback Type and Learner Perceptions

International Journal of Applied Linguistics, EarlyView.
ABSTRACT Spurred by the advancement of educational technology, more language instruction has been offered in online environments. Consequently, teaching practices have had to adapt to digital platforms. Accordingly, teachers’ provision of synchronous written corrective feedback (SWCF) on digital texts has received increasing attention.
Sanghee Kang, YouJin Kim, Minkyung Kim
wiley   +1 more source

Japanese Women's Attitudes Toward Learning Languages Other Than English in the Era of Global English

International Journal of Applied Linguistics, EarlyView.
ABSTRACT This study on female Japanese learners of the Korean language is situated in the centuries‐long anti‐Korean sentiments in Japan, the global popularity of the Korean Wave, particularly among women, and the essentialized image of socially marginalized young Japanese women who study English with romantic desires for Western men.
Yoko Kobayashi
wiley   +1 more source

Structural characterization of liquid phase sintered silicon carbide by high-resolution X-ray diffractometry Caracterização estrutural do carbeto de silício sinterizado na presença de fase líquida por difratometria de raios X de alta resolução

Cerâmica, 2005
Silicon carbide (SiC) was sintered using two different additives: AlN-Y2O3 or AlN-CRE2O3. CRE2O3 is a mixed oxide formed by Y2O3 and rare-earth oxides.
C. A. Kelly, P. A. Suzuki, S. Ribeiro, S. Kycia   +3 more
doaj   +1 more source

Characterization of Lithia‐Based Machinable Glass‐Ceramic Materials

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objective Lithia‐based glass ceramics lead the indirect single‐unit restoration market, but the underlying evidence is dominated by a single material. New materials have been introduced. The purpose was to investigate the elemental composition, elemental oxide composition, as‐fabricated surface morphology, as‐fabricated flexural strength ...
Anvita Maharishi, Edward A. McLaren, Shane N. White   +2 more
wiley   +1 more source

Luminescence Properties of Nanocrystalline Y2O3:Eu

Advanced Materials, 2001
Y2O2:Eu nanocrystals in the size range 70-100 nm were fabricated. The crystals show a photoluminescence efficiency 10-20% higher than commercial bulk material. It was found that under electron excitation, the nanocrystalline material is 50% more efficient than the bulk at 1 kV accelerating voltage.
Wakefield, G, Holland, E, Dobson, P, Hutchison, J   +3 more
openaire   +2 more sources

Translucency of 3D‐Printed 3Y‐ and 5Y‐Doped Zirconia

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To evaluate and compare the translucency of 3D‐printed zirconia materials: 3Y tetragonal zirconia polycrystal (3Y‐TZP) and 5Y partially stabilized zirconia (5Y‐PSZ). Material and Methods 3D‐printed 5Y‐PSZ and 3Y‐TZP materials fabricated using digital light processing (DLP) were investigated.
Sebastian Hetzler, Clemens Schmitt, Peter Rammelsberg, Stefan Rues, Andreas Zenthöfer   +4 more
wiley   +1 more source

Caracterização estrutural por difração de raios X de alta resolução de SiAlONs sinterizados com diferentes aditivos Structural characterization by high-resolution X-ray diffraction of SiAlONs sintered with different additives

Cerâmica, 2005
A técnica de difração de raios X de alta resolução foi utilizada para a caracterização estrutural da solução sólida, formada a partir de nitreto de silício (Si3N4), denominada alfa-SiAlON.
C. Santos, P. A. Suzuki, K. Strecker, S. Kycia, C. R. M. Silva   +4 more
doaj   +1 more source

Shells of crystal field symmetries evidenced in oxide nano-crystals

, 2012
By the use of a point charge model based on the Judd-Ofelt transition theory, the luminescence from Eu3+ ions embedded in Gd2O3 clusters is calculated and compared to the experimental data.
Amans, David, Dujardin, Christophe, Ledoux, Gilles, Masenelli, Bruno, Melinon, Patrice   +4 more
core   +2 more sources

Effect of Occlusal Adjustment and Subsequent Repolishing on the Translucency Parameter, Contact Angle, and Flexural Strength of Different Types of Glazed Monolithic Zirconia

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives This study evaluated the effects of material and surface condition (glazed vs. polished after simulated occlusal adjustment) on translucency parameter, contact angle, and flexural strength of four monolithic zirconia. Materials and Methods Disk‐shaped specimens (n = 80, Ø12 × 1 mm) were fabricated from four monolithic zirconia ...
Kelli Nunes Monteiro, Rafaela Paschoalin Nigro, Stéphanie Soares Favero, Ranulfo Benedito de Paula Miranda, Estevam Augusto Bonfante, Paulo Francisco Cesar   +5 more
wiley   +1 more source