reaction to fire of fire-retarded rigid pur foams and two types of metal faced rigid polyurethane foam core sandwich panel was evaluated by using cone calorimeter test method. the tests were carried out in various radiative heat fluxes from 15 to 75 kw/m2. the radiation rate effect on reaction to fire parameters, including time to ignition (tti), peak of heat release rate (prhr), total heat rel...

Liquid foams have important practical applications in mineral separation and oil recovery. However, the details of the foam mechanics in these applications are poorly understood. Foam scientists have used 2D foam simulations to model foam behavior and 2D visualization solutions have helped them explore and analyze their data. Three-dimensional foam simulations remove some of the simplifying ass...

516 www.pccmjournal.org June 2016 • Volume 17 • Number 6 Objectives: To compare the severity of illness and outcomes among children admitted to a children’s hospital PICU from referring emergency departments with and without access to a pediatric critical care telemedicine program. Design: Retrospective cohort study. Setting: Tertiary academic children’s hospital PICU. Patients: Pediatric patie...

The relative immobility of foam in porous media suppresses the formation of fingers during oil displacement leading to a more stable displacement which is desired in various processes such as Enhanced Oil Recovery (EOR) or soil remediation practices. Various parameters may influence the efficiency of foam-assisted oil displacement such as properties of oil, the permeability and heterogeneity of...

1. Abstract 2. Introduction 3. Nature of lipid in foam cells 4. Sources of cholesterol that accumulates in foam cells 5. Significance of foam cell formation 5.1. Trapping lipid in lesions versus removing lipid from lesions 5.2. Alteration of macrophage function 6. The use of cultured macrophages to study foam cell formation 7. In vitro foam cell formation 7.1. Plasma lipoproteins 7.2. Non-lipop...

In this article, an innovative supervision system will be proposed that can observe and analyze health of Circuit Breaker’s trip coil. The proposed design also logs changes in the coil's quality and informs network supervisor in case of Circuit Breaker (CB) failure. This system injects small direct currents to the Circuit Breaker connections and the trip coil to compute CB’s health and characte...

generally, the failure rate and the repair time of system components are constant parameters in reliability assessment of electric distribution systems. a failure of component is resulted from failing in the operation or overloading. in addition, there exist cases where, the repair times of components are small and tolerable from customer point of view. thus, tolerable repair times may be overl...

Abstract: The application of electric field theory to widely different aspects of electrical insulation has led to more understanding the phenomena. Electric fields may be considered as the main reason for insulation failure. The purpose of this paper is to modify importance of analyzing electric field in insulation design. The SF6 circuit breaker is chosen as case study that encounters cri...