CO2 capture and storage (CCS) is receiving considerable attention as a potential greenhouse gas (GHG) mitigation option for fossil fuel power plants. Cost and performance estimates for CCS are critical factors in energy and policy analysis. CCS cost studies necessarily employ a host of technical and economic assumptions that can dramatically affect results. Thus, particular studies often are of...

Growth substances are compounds of a hormonalnature which, although present in the plant in extremely low concentrations, govern the life of the plant. 1\-1:uch regarding these substances is still obscure. Until recently it was thought that the chemical structure of all c~mpounds with growth substance activity (both natural and synthetic) conformed to two essential requirements, but the members...

This paper describes the specification of requirements and the functionality, of a novel agricultural mechanisation system based on small smart machines. It separates the current mechanisation methods from the original plant requirements and in doing so allows a new specification to develop based on agronomic, economic and environmental needs that can lead to a more sustainable production syste...

In automation plants, the software that controls the behavior of a plant must adhere to strict process requirements arising from the technical processes and from the physical plant design. In current practice, the validation of the control software starts late in the engineering process – in many cases not before the plant is almost completely constructed, leading to increased efforts for corre...

Requirements engineering (RE) is often seen as an essential facet in software development. It is a vital process before each project starts. In the context of systems engineering, an understanding and application of systems theory and practice is also relevant to RE. The contexts in which RE takes place habitually involve human activities. Therefore, RE needs to be sensitive to how people perce...

Plant protection products which are environment friendly, more selective and with a new mode of action are welcomed to be placed on the market and used. The reasons for the growing demand for new active substances are among others the withdrawals of the old ones due to new, more strict requirements and problems with resistance of harmful organisms against the existing active substances. The pap...

This work considers model synthesis and validation in controller design. The problem we are interested in is to derive a formal model of a controlled automation system from a semi-formal description of the uncontrolled plant and various requirements concerning the plant and the processes of the controlled system. These requirements are formulated on many different abstraction levels, partly emp...

The paper deals with a new robust PID controller design method based on integrating requirements on transient performance into the popular frequency-domain Ziegler-Nichols design approach. The developed method provides support to the designer by converting identified ultimate plant parameters into PID controller parameters using variable weights that depend on expected maximum overshoot max an...