BACKGROUND Many studies have shown that airborne particles are associated with increased risk of death, but attention has more recently focused on the differential toxicity of particles from different sources. Geographic information system (GIS) approaches have recently been used to improve exposure assessment, particularly for traffic particles, but only for long-term exposure. OBJECTIVES We...

A control-oriented dynamic model of a catalytic partial oxidation-based fuel processor is developed using physics-based principles. The fuel processor system (FPS) converts a hydrocarbon fuel to a hydrogen (H2)-rich mixture that is directly feed to the proton exchange membrane fuel cell stack (PEM-FCS). Cost and performance requirements of the total powerplant typically lead to highly integrate...

Abstract In the current energy market, hydraulic turbines are increasingly demanded to work in Frequency containment reserve (FCR) mode compensate constant frequency fluctuations electrical grid. To do so, change their generating power continuously which implies regulate flow rate. Kaplan double regulated machines that position of both guide vanes and runner blades rate maximizing efficiency. T...

Titanium is widely applied for the tube condenser in Indonesia’s powerplant especially those that use seawater cooling system, because it has excellent properties both mechanical and physical. Leak titanium environment occurred, but on contrary, leak of brackish frequently occurs. Many defense tasks such as plugging, cleaning, adjusting operations have taken, result remains same. Until was deci...

Local hardness increasing on the surface of the power plant rotor may result in severe damages. One major solution for rapid repairing of the rotors is the adaptive tempering heat treatment. For this purpose, after identification of the damaged rotor, initial investigations and tests (such as visual inspection, chemical analysis, nondestructive hardness measurements and replica or on-site metal...

BACKGROUND: Specific demands to ensure high mobility and low energy consumption while cornering are given in the process of development transport special tracked vehicles. Therefore, improvement values these parameters is a relevant objective. The mentioned directly dependent on chosen type transmission.
 AIM: Derivation transmission kinematic schemes that provide best opportunities qualit...

Reducing the cement content in concrete is need for environmental sustainability, as produces a significant carbon emission. This work aims to study effect of partial replacement utilizing fly ash at various percentage substitution by investigating physical characteristic ingredients, compressive testing curing age, workability, and material cost reduction. Fly used this research categorized ty...

Theuse of composites within the aeronautical field is not limited to airframeapplications and includes powerplant components in reciprocating engines. Toadd research body this area, presented work aimed evaluate theperformance novel carbon fiber valve covers installed on an aircraftreciprocating engine. Specifically, comparative performance between novelcomposite-based original steel was intere...