نتایج جستجو برای: microstructure

تعداد نتایج: 40248  

2001
Jun Zou Jack Chen Chang Liu

This paper presents the development and application of a 3D microstructure assembly process Plastic Deformation Magnetic Assembly (PDMA). In PDMA, certain part of a microstructure is plastically deformed by the magnetic force generated in a magnetic material piece attached to the microstructure when an external magnetic field is applied. Due to this plastic deformation, the entire microstructur...

1999
Bo Li Mitchell Luskin

We report results on a nite element simulation of a needle-like martensitic microstructure observed in biaxial loading experiments conducted by Chu and James on single crystals of the shape-memory alloy Cu-14at.%Al-3:9at.%Ni. This microstructure was observed near an interface between twinned layers of two variants and a pure variant of martensite. We used a geometrically nonlinear theory of mar...

2005
Francis X. Diebold Georg H. Strasser

We argue for incorporating the financial economics of market microstructure into the financial econometrics of asset return volatility estimation. In particular, we use market microstructure theory to derive the cross-correlation function between latent returns and market microstructure noise, which feature prominently in the recent volatility literature. The cross-correlation at zero displacem...

2016
Gen Liang Chen Shi Yajun Zhou Daheng Mao Hugo F. Lopez

The effects of ultrasonic treatment (UST) on the solidification microstructure of a 35CrMo steel cast ingot were investigated. To avoid the erosion of a high-temperature melt, a T-shaped ultrasonic waveguide unit was used to introduce ultrasonic vibrations into a 35CrMo steel die casting melt. The experimental results show that the microstructure of the ingot was refined by ultrasonic treatment...

2016
Petra V. Viher Katharina Stegmayer Stéphanie Giezendanner Andrea Federspiel Stephan Bohlhalter Tim Vanbellingen Roland Wiest Werner Strik Sebastian Walther

Diffusion tensor imaging (DTI) studies have provided evidence of widespread white matter (WM) abnormalities in schizophrenia. Although these abnormalities appear clinically significant, the relationship to specific clinical symptoms is limited and heterogeneous. This study examined the association between WM microstructure and the severity of the five main DSM-5 schizophrenia symptom dimensions...

2007
Armel Le Bail

Innovative applications of the Rietveld method [1-3] are likely to include new developments in microstructure analysis. More and more samples show microstructure effects on line profile shape, width and position. Reasons are obviously the powder diffractometer resolution improvements at leading synchrotron sources, and the increasing user number. When the minimal full width at half maximum is a...

2016
María E. Hidalgo Mirta Armendariz Jorge R. Wagner Patricia H. Risso Osvaldo H. Campanella

The aim of this work was to study the effect of xanthan gum (XG) on the gelation process of bovine sodium caseinate (NaCAS) induced by acidification with glucono-δ-lactone (GDL) and on the mixed acid gel microstructure. Before GDL addition, segregative phase separation was observed in all the NaCAS-XG mixtures evaluated. The gelation process was analyzed by using a fractional factorial experime...

2018
Li Hu Qunxing Xu Jizhen Li Feifei Wang Xinghua Xu Zhiyuan Sun Xiangxing Ma Yong Liu Qing Wang Dawei Wang

KIBRA rs17070145 polymorphism is associated with variations in memory function and the microstructure of related brain areas. Diffusion kurtosis imaging (DKI) as an extension of diffusion tensor imaging that can provide more information about changes in microstructure, based on the idea that water diffusion in biological tissues is heterogeneous due to structural hindrance and restriction. We u...

2015
Martin Drábik Josef Pešička Hynek Biederman Dirk Hegemann

Nanocomposite coatings of silver particles embedded in a plasma polymer matrix possess interesting properties depending on their microstructure. The film microstructure is affected among others also by the RF power supplied during the deposition, as shown by transmission electron microscopy. The optical properties are characterized by UV-vis-NIR spectroscopy. An anomalous optical absorption pea...

Journal: :Lab on a chip 2013
Byeong Il Kim Kyoung G Lee Tae Jae Lee Bong Gill Choi Jung Yuon Park Chi Young Jung Chang-Soo Lee Seok Jae Lee

We demonstrate a practical design and integration of multidirectional tilted UV lithography and microinjection molding for microstructure-based microfluidic devices. The previously reported undercut (or T-profile) problem of photoresist causes the imperfect mirror image duplication of the microstructures to the Ni mold. This issue inevitably leads to the unstable molds in the production of micr...

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