293 research outputs found
Generalized Differentiation and Characterizations for Differentiability of Infimal Convolutions
This paper is devoted to the study of generalized differentiation properties
of the infimal convolution. This class of functions covers a large spectrum of
nonsmooth functions well known in the literature. The subdifferential formulas
obtained unify several known results and allow us to characterize the
differentiability of the infimal convolution which plays an important role in
variational analysis and optimization
Quasi-Relative Interiors for Graphs of Convex Set-Valued Mappings
This paper aims at providing further studies of the notion of quasi-relative
interior for convex sets introduced by Borwein and Lewis. We obtain new
formulas for representing quasi-relative interiors of convex graphs of
set-valued mappings and for convex epigraphs of extended-real-valued functions
defined on locally convex topological vector spaces. We also show that the
role, which this notion plays in infinite dimensions and the results obtained
in this vein, are similar to those involving relative interior in
finite-dimensional spaces.Comment: This submission replaces our previous version
Experimental and Numerical Investigations on Flexural Behaviour of Prestressed Textile Reinforced Concrete Slabs
Nowadays, concrete is mostly prestressed with steel. But the application of prestressing steel is restricted in a highly corrosive environment area due to corrosion of prestressing steel, leading to a reduction in strength and may cause sudden failure. Carbon textile is considered an alternate material due to its corrosive resistance property, high tensile strength, and perfectly elastic. Prestressing is also the only realistic way to utilize fully ultra-high tensile strength in carbon textile material. In this study, experimental and numerical analyses were carried out for the flexural behaviour of prestressed and non-prestressed carbon textile reinforced concrete slabs. This study also focuses on the inļ¬uences of textile reinforcement ratios, prestressing grades on the flexural behaviour of carbon textile reinforced concrete (TRC). Fifteen precast TRC slabs were tested, of which six were prestressed to various levels with carbon textile. The obtained results show that prestressing textile reinforcement results in a higher load-bearing capacity, stiffness, and crack resistance for TRC slabs. The ļ¬rst-crack load of the prestressed specimens increased by about 85% compared with those of non-prestressed slabs. Three-dimensional finite element models were developed to provide a reliable estimation of global and local response. The modeling techniques accurately reproduced the experimental behaviour.Ā Doi: 10.28991/cej-2021-03091712 Full Text: PD
Parentsā inter-ethnic marriage and childrenās education and disability: Evidence from Vietnam
This paper examines whether interethnic marriage of parents is associated with educational performance of children in Vietnam using data from the 2009 Population and Housing Census. It finds that interethnic marriage of parents is associated with educational attainment of children in Vietnam. Children with parents from different ethnic groups tend to have better education and lower disability incidence than children with parents from one ethnic minority group
Parentsā inter-ethnic marriage and childrenās education and disability: Evidence from Vietnam
This paper examines whether interethnic marriage of parents is associated with educational performance of children in Vietnam using data from the 2009 Population and Housing Census. It finds that interethnic marriage of parents is associated with educational attainment of children in Vietnam. Children with parents from different ethnic groups tend to have better education and lower disability incidence than children with parents from one ethnic minority group
Anti-inflammatory activity of methyl ferulate isolated from Stemona tuberosa Lour
AbstractObjectiveTo evaluate the anti-inflammatory activity of methyl ferulate (MF) isolated from the roots of Stemona tuberosa (S. tuberosa) Lour (Stemonaceae) in lipopolysaccharide activated macrophage cells.MethodsMethanol extracts of a root powder of S. tuberosa were prepared for isolation of a potential anti-inflammatory agent using ultrasound extraction combined with repeated chromatography on silica gel. After the quantitative analyses, anti-inflammatory activity of the isolated compound was evaluated by measurement of cytokine release, NO generation, expression of cyclooxygenase-2 and phosphorylation of mitogen activated protein kinases including p38 and c-Jun NH2-terminal kinase using quantitative kits and Western blotting with specific antibodies.ResultsThe isolation process yielded a potential anti-inflammatory compound with a purity level of 99% determined by high performance liquid chromatography. The compound was identified as MF by using nuclear magnetic resonance. MF strongly inhibited the release of pro-inflammatory cytokines from macrophages, including IL-6, TNFĪ±, IFNĪ³, yet it did not affect the anti-inflammatory cytokine IL-10. Phosphorylation of p38 and c-Jun NH2-terminal kinase were clearly reduced in MF-treated macrophages stimulated with lipopolysaccharide. cyclooxygenase-2 expression and NO generation by macrophages were also suppressed when the cells were treated with MF.ConclusionsThe data suggested that MF is a possible inhibitor of the mitogen activated phosphor kinase pathway and could be a potential anti-inflammatory agent isolated for the first time in medicinal plant S. tuberosa
Fenchel-Rockafellar Theorem in Infinite Dimensions via Generalized Relative Interiors
In this paper we provide further studies of the Fenchel duality theory in the
general frame work of locally convex topological vector (LCTV) spaces. We prove
the validity of the Fenchel strong duality under some qualification conditions
via generalized relative interiors imposed on the epigraphs and the domains of
the functions involved. Our results directly generalize the classical
Fenchel-Rockafellar theorem on strong duality from finite dimensions to LCTV
spaces.Comment: arXiv admin note: text overlap with arXiv:1812.0060
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