Introduction: Increased consumption of energy drinks has raised concerns about their effects on dental restorations. This study assessed the effects of two energy drinks on the surface microhardness of methacrylate and silorane-based composites after 1-week and 1-month periods. Materials & Methods: In this in-vitro study, 90 cubic samples were prepared from Filtek P90, Filtek Z250 and Filtek Z...

Wood-based composite utility poles are rece!VIng increasing attention in the North American pole market. This interest is being driven by many increasing factors such as increasing: (I) disposal costs of solid wood poles, (2) liability and environmental concerns with traditional means of disposal of solid wood poles, (3) cost and concerns of long-term availability of pole-sized timber, and ( 4)...

There is an increasing interest in tying together software systems to interoperate and cooperate over the Internet. One common glue technology for distributed, loosely coupled, heterogeneous software systems is Message Oriented Middleware (MOM). In this paper we present a framework for composite-event-based MOM (cMOM) and its implementation. The cMOM can also be considered as a grid event servi...

Composite propellers offer high damping characteristics and corrosion resistance when compared with metal propellers. But the design of a hybrid composite propeller with the same strength of metal propeller is the critical task. For this purpose, the present paper focusses on fluid-structure interaction analysis of hybrid composite propeller with Carbon/Epoxy, R-Glass/Epoxy and S2-Glass/Epoxy t...

The current study evaluated the bonding ability of composite to glass ionomer cement (GIC) using three different bonding systems. One hundred samples of composites bonded to GIC were prepared and divided into five groups. In Group A, the composite was bonded to GIC after the initial setting of the GIC being employed as a total-etch adhesive. In Group B, the self-etch primer was employed to bond...

A study was carried out to characterize Ni-Co-PVC and Ni-Cu-PVC composite materials prepared by mechanical alloying technique (MAT) using SEM, EDS and electrochemical test. Composite materials were prepared by mixing together 95% of metal powder (Ni+Co or Ni+Cu) with 5% PVC. PVC was used as a binder and tetrahydrofuran (THF) was used as a solvent in composite material preparation. Based on the ...

Context-aware systems are one of the most important application domains of pervasive computing. In this paper, a new context model is proposed, which is based on the composite sensor concept. Unlike simple ones (physical, virtual or logical sensors), a composite sensor is a logical sensor which is integrated from simple and/or other composite ones. Therefore, composite sensor has more semantic ...