Structural Transformation
Mostrando 13-24 de 529 artigos, teses e dissertações.
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13. UNASUR, Brazil, and the South American defence cooperation: A decade later
Abstract UNASUR and its Defence Council (SADC) were created under a promising scenario of regional cooperation. Almost ten years later, a growing demand for regional cooperation arises, facing, however, low levels of political willingness from local governments. Through the lenses of structural and neoclassical realism, this paper suggests that the lack of s
Rev. bras. polít. int.. Publicado em: 18/01/2018
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14. Mechanical behavior of yttria-stabilized tetragonal zirconia polycrystal: Effects of different aging regimens
Abstract This study aimed to characterize and compare the effect of different aging regimens on surface characteristic (topography and roughness), structural stability (phase transformation) and mechanical performance (Weibull analysis) of a Y-TZP ceramic. Discs (15 × 1.2 mm; VITA In-Ceram YZ) were prepared according to ISO 6872-2015 for biaxial flexural st
Braz. oral res.. Publicado em: 07/12/2017
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15. Effect of ceramic thickness, grinding, and aging on the mechanical behavior of a polycrystalline zirconia
Abstract Monolithic restorations of Y-TZP have been recommended as a restorative alternative on prosthetic dentistry as it allows a substantial reduction of ceramic thickness, which means a greater preservation of tooth structure. However, the influence of grinding and aging when using a thinner layer of the material is unclear. This investigation aimed to e
Braz. oral res.. Publicado em: 06/11/2017
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16. Structural and Magnetic Properties of Duplex Stainless steel (UNS S31803) Powders Obtained by high Energy Milling of Chips with Additions of NbC
In this study, the high energy mechanical milling was utilized to the production of duplex stainless steel powders from the recycling chips with and without the addition niobium carbide. The effect of milling time and addition carbide on the morphology, particle size and magnetic properties of the powders was investigated. The utilization of the powder metal
Mat. Res.. Publicado em: 30/10/2017
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17. HIGH PRESSURE BEHAVIOR OF CRYSTALLINE DIHYDROXYLAMMONIUM 5,5'-BISTETRAZOLE-1,1'-DIOLATE: FIRST-PRINCIPLES STUDY
Density functional theory (DFT) periodic calculations were performed to study the geometrical and electronic structures of energetic compound dihydroxylammonium 5,5'-bistetrazole-1,1'-diolate (TKX-50) under the pressure ranging from 0 to 400 GPa. The optimized crystal structure by the local density approximation (LDA) with CA-PZ functional matches well with
Quím. Nova. Publicado em: 2017-10
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18. Martensitic Transformation Under Compression of a Plasma Processed Polycrystalline Shape Memory CuAlNi Alloy
Shape memory alloys (SMA) are attracting considerable attention owing to possible applications from biomedical to aerospace. In particular, CuAlNi alloys present significant advantages associated with low cost, easy processing and superior thermo-electric conductivity over other SMAs such as the NiTi alloys. Characterization of some properties and structural
Mat. Res.. Publicado em: 31/08/2017
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19. Saudade do partido: referencias nostálgicas entre militantes de las bases de sustentación de los gobiernos argentinos y brasileros (2003-2015)
Abstract The paper examines and compares the presence of nostalgic references between militants of government-supporting organizations in Brazil and Argentina since the inauguration of Lula and Kirchner. As part of a wider research on grassroots activism within governments' political bases in both countries, the phenomenon of nostalgia observed in this study
Rev. Sociol. Polit.. Publicado em: 2017-06
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20. Network Effects on Radical Innovation and Financial Performance: An Open-mindedness Approach
Abstract This study examines how companies can achieve high performance through certain organizational behaviors (open-mindedness and social networks) and innovation. The impact of open-mindedness in defiance of basic assumptions and processes could motivate the use of internal and external networks. These social networks are the cornerstone for the creation
BAR, Braz. Adm. Rev.. Publicado em: 13/02/2017
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21. Mule Drivers in Nineteenth-Century Lebanon: from local social history towards Global History
Abstract: This article makes the case for a project in the making: a study of the social transformation of the countryside as it joins the global market over the long nineteenth century, told as a collective biography of the mule drivers of Ottoman Lebanon - those obscure peasants who, owning one or a few mules, made their livelihood in the transport of good
Almanack. Publicado em: 2016-12
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22. Effects of Partial Edge Loading and Fibre Configuration on Vibration and Buckling Characteristics of Stiffened Composite Plates
Abstract In this work, the influence of uniaxial and biaxial partial edge loads on buckling and vibration characteristics of stiffened laminated plates is examined by using finite element method. As the initial pre-buckling stress distributions within an element are highly non-uniform in nature for a given loading and edge conditions, the critical loads are
Lat. Am. j. solids struct.. Publicado em: 2016-05
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23. Effect of Spun Velocities and Composition on the R‒phase and Thermomechanical Behavior in Ti‒Ni Ribbons Electrically Heated
This work deals with structural, electrical and mechanical characterization of Ti‒50.13Ni and Ti‒49.62Ni (at.%) shape memory alloys (SMAs) fabricated at different circumferential wheel velocities. The effect of wheel velocity, chemical composition and heat treatments are investigated. The characterization of crystallographic phases of the Ti‒Ni ribbons
Mat. Res.. Publicado em: 08/04/2016
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24. Pressure-induced Structures and Structural Evolution in Iron
Molecular-dynamic simulations have been used to study the structure evolution in iron melts rapidly cooled under different pressures. An extreme cooling rate (4×1012K/s) was adopted in the cooling process. The simulation results show that at the ambient pressure, martensitic transformation happened. However, at a pressure of 1.4GPa, the system passes from b
Mat. Res.. Publicado em: 17/11/2015