Kutut Suryopratomo

Textile-based microfluidics: modulated wetting, mixing, sorting, and energy harvesting

Microfluidics technology allows us to perform rapid and massively parallel manipulation and characterization of fluid samples with biomedical and environmental importance. In the attempt to achieve resource-efficient fabrication and operation of the microfluidic devices, paper-based and thread-based microfluidics have been previously demonstrated by other researchers. We propose to develop textile-based microfluidics, formed by three-dimensional networks of individual threads, to further advance the ability of paper-based and thread-based microfluidics. This paper describes four different phenomena that we investigate in textile-based microfluidic systems: modulated wetting, liquid mixing, liquid sorting, and energy harvesting. Our results indicate the feasibility of textiles as a new platform to develop low-cost microfluidic technology.

A toolbox for safety instrumented system evaluation based on improved continuous-time Markov chain

Safety instrumented system (SIS) is designed to restore a plant into a safe condition when pre-hazardous event is occur. It has a vital role especially in process industries. A SIS shall be meet with safety requirement specifications. To confirm it, SIS shall be evaluated. Typically, the evaluation is calculated by hand. This paper presents a toolbox for SIS evaluation. It is developed based on improved continuous-time Markov chain. The toolbox supports to detailed approach of evaluation. This paper also illustrates an industrial application of the toolbox to evaluate arch burner safety system of primary reformer. The results of the case study demonstrates that the toolbox can be used to evaluate industrial SIS in detail and to plan the maintenance strategy.