A method to investigate dc-network instabilities in multi-terminal HVDC systems is presented. The method consists of defining subsystems, called in this paper Z and Y, which can be interpreted as a dc-network impedance matrix and as set of converter ...
Within the chemical industry fossil resources are commonly used as raw material for producing desired chemicals. Due to that fossil resources are a finite resource and that using these resources result into CO2 emissions that have an environmental im...
Vacuum degassing of activated sludge was tested at eight different Swedish wastewater treatment plants with laboratory-scale equipment in batch mode in order to evaluate its efficiency on improvement of sludge compaction and settling properties. The ...
Within this article the concept of space as a social phenomenon is discussed in relation to collaboration and knowledge sharing within construction design projects. Space has been neglected in project literature and we argue for the relevance to intr...
The true capacity of a production or service system is often difficult to estimate with sufficient accuracy. The two main methodological approaches to capacity measurement described in the literature – measurements based on engineering and physical f...
Valid time data, a prerequisite for the efficient use of manufacturing resources, directly influence planning and control quality. However, access to time data that capture real shop-floor operations in general and manual operations in particular is ...
Många av våra äldre flerbostadshus behöver moderniseras och renoveras inom de närmaste åren. Ofta handlar det då om byggnader som redan är renoverade och skall genomgå en andra större renovering. Vid renovering av äldre flerbostadshus behöver bevaran...
The development of railway wheel steel grades has gone towards higher strength to enhance rolling contact fatigue resistance and ability to withstand thermally induced damage throughout the service lifetime. In this study a recently developed wheel s...
Two types of powder metallurgical tool steels (i.e. with and without nitrogen) are investigated with respect to their galling related surface properties. Despite similar macrohardness values, Vancron 40 (nitrogen alloyed) exhibits superior wear behav...
This paper presents a characterisation of two austenitic manganese (~12-13 wt%) rail steels, one in rolled (Mn13(R)) and the other in as-cast (Mn13(C)) condition. Cyclic and monotonic behaviour as well as hardness and microstructure have been investi...
