This paper presents a computing architecture suitable for the information information management and the demanding calculations of the supply chain. A grid architecture is proposed for distributed computations for simulation studies, integrated software applications, process synthesis, and large-scale optimisation. The proposed network features numerous advantages over traditional, monolithic s...

In the field of occupational hygiene, the setting of permissible levels of hazards in the work environment is one of the mechanisms used in occupational health to prevent health impairment in the worker. The term “permissible level” has been defined. Basically, it is a quantitative hygiene standard for a level considered to be safe, expressed as a concentration for a defined average time. In re...

Microalgae are capable producers of food, feed supplement, chemicals, and biofuels. Marine microalgae and cyanobacteria are rich in several chemical compounds therefore, they could be used in some biological applications related with health benefits. Through microalgae, a wide variety of compounds such as polyphenols, polyunsaturated fatty acids (PUFA), or phytosterols can be obtained. However,...

The detection of abnormal events in advance is still a challenge in chemical industries. The earlier it is done, the greater the possibility of at least mitigating losses. This study investigates the performance of a signal processing tool so-called hidden Markov model (HMM) in accomplishing detection tasks. The case study is based on a chemical recovery boiler that belongs to a Kraft pulping m...

This article reports the results of a 1977 field survey of managers in fifty plants in the United States and Canada that have recently instituted twelve-hour shifts in continuous operation situations in the chemical and petroleum industries. The authors report that in all the plants studied the shift change has significantly improved morale without impairing efficiency, job safety, or workers' ...