1 Centro de Estudios Avanzados en Zonas Áridas, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile, 2 Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, USA, 3 Departamento de Ecología, Pontificia Universidad Católica de Chile, Alameda, Chile, 4 Facultad de Ingeniería y Ciencias and Facultad de Artes Liberales, Universida...

1) Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84506 Bratislava, Slovakia (e-mail: [email protected]) 2) University of Trnava, Faculty of Education, Department of Biology, Priemyselná 4, P.O. Box 9, SK-91843 Trnava, Slovakia (e-mail: [email protected]) 3) Estación Experimental de Zonas Áridas (CSIC), Departamento de Ecología Funcional y Evolutiva, General S...

A coupled reactor/furnace simulation has been conducted for a 100 kt/a SL-II naphtha cracking furnace containing both long-flame and radiation burners. The computational fluid dynamics approach was used to simulate the flow, combustion and radiative heat transfer in the furnace. The software packages COILSIM1D and SimCO were used to account for the cracking process in the reactor coils. The sim...

There are many potential sources of ignition which can trigger a fire or explosion: electrical sparks, friction, static discharge, hot surfaces, air streams, and direct-fired burners in ovens and thermal oxidizers. Since we can never be guaranteed that an environment will remain completely free of air or of a source of ignition, the most reliable means of preventing fire or explosion is to meas...

background: heat stress is one of the agents in the work environment that can create numerous problems for workers. the objective of this research is to study heat stress control in the foundry platform of a steel plant in tehran. methods: in this experimental study, controlling plans were demonstrated for the work conditions improvement in one of steel plant's foundry platforms. for controllin...

BACKGROUND The Reducing Disparities in Access to kidNey Transplantation Community Study (RaDIANT) was an End-Stage Renal Disease (ESRD) Network 6-developed, dialysis facility-level randomized trial testing the effectiveness of a 1-year multicomponent education and quality improvement intervention in increasing referral for kidney transplant evaluation among selected Georgia dialysis facilities....

OBJECTIVES The purpose of this study was to build a photo migration model to calculate the radiant exposure (irradiancextime) in dental composite and to relate the radiant exposure with extent of cure using polymer kinetics models. METHODS A composite (Z100, Shade A2) cylinder (21 mm diameter by 15 mm deep) was cured with a tungsten-halogen lamp emitting 600 mW/cm2, 1 mm above the composite f...

This numerical study investigates the impact of four proposed porous burner designs, which are based on a diamond lattice structure similar to what could be obtained with additive manufacturing technology, H 2 /CO syngas production. The performances all burners were compared, and results showed that for given porosity, recirculation efficiency increased increasing pore density. Decreasing poros...

The efficient use of energy is an important strategic issue concerning our security and double carbon goals. Many industrial waste gases, such as oil refineries, contain a lot ethylene, which gas that harmful to people the environment. high-efficiency burners reduce ethylene emissions proven convenient way, so improvement optimization has become hot research nowadays. In this paper, new porous ...

Radiometry is the measurement of radiant electromagnetic energy, especially that associated with the IR spectrum. It can be more simply defined as an absolute measurement of radiant flux. The typical unit of measure for imaging radiometry is radiance, which is expressed in units of Watts/(sr-cm2). (The abbreviation “sr” stands for steradian; a non-dimensional geometric ratio expressing the soli...