The mechanical properties of newly developed aspen fiber–polypropylene composites (APC) were experimentally explored and numerically predicted at the temperatures and humidity that are typical for domestic housing applications. The mechanical properties of APCs with five different fiber-loadings were evaluated at the room temperature, 4 �C, and 40 �C. Environmental effects on the mechanical pro...

Social annotation has become a popular manner for web users to manage and share their information and interests. While users' interests vary with time, tag correlation also changes from users' perspectives. In this work, we explore four methods for estimating temporal correlation between social tags and detect if a long term trend emerges from the history of temporal correlation between two tag...

[l] T.A. Gulliver and V.K. Bhargava, “Some best rate l / p and rate (p l ) / p systematic quasi-cyclic codes,” IEEE Trans. Inform. Theory, vol. IT-37, pp. 552-555, May 1991. [2] T.A. Gulliver and V.K. Bhargava, “Nine good rate (m l) /pm quasicyclic codes,” IEEE Trans. Inform. Theory, vol. IT-38, pp. 1366-1369, July 1992. [3] G.E. S6guin and G. Drolet, “The theory of 1-generator quasi-cyclic cod...

This present research aims to predict the mechanical behavior of composite and hybrid composites based on a polypropylene matrix (PP) reinforced by organic/inorganic naturally occurring fillers using analytical numerical models. It also demonstrate effect hybridization global stiffness material. In this study, Voigt-Reuss models, Halpin-Tsai equations, Hirsch model, simulation are applied effec...

This paper presents an analytical study on the dynamic stability of carbon nanotubes (CNTs) reinforced functionally graded composite beams when subjected to axial excitation loading. The are using a I-type CNTs reinforcement. section properties non-uniform assessed Halpin–Tsai model. analysis is performed by Bolotin’s method. Analytical expressions determining free vibration frequency, critical...

Based on a bibliographic review, the article identifies and offers a critical analysis of scientific production by the public health field in Brazil on genetically modified organisms and food (in)security. Of the 716 articles found on the portals of the Scientific Electronic Library Online (SciELO) and the Coordinating Agency for the Development of Higher Education (Capes), only 8 address the f...

Public opposition to genetically modified organisms (GMOs) remains strong. By contrast, studies demonstrate again and again that GM crops make a valuable contribution to the development of a sustainable type of agriculture. The discrepancy between public opinion and the scientific evidence requires an explanation. We argue that intuitive expectations about the world render the human mind vulner...

Under the influence of axial forces and uniform temperature variations, thermal buckling postbuckling composite beams reinforced functionally graded multilayer graphene platelets (GPLs) resting on nonlinear elastic foundations are examined. The Halpin-Tsai model is used to calculate modulus each layer GPL-reinforced (GPLRC). According virtual work principle, governing equations for beam obtaine...