Filtyp
Proton-exchange membrane fuel cells (PEMFCs) have been widely studied in the search for alternative power sources. However, there are still several challenges remaining with this technology linked to high costs and life-time issues.1 One alternative to the use of PEMFCs is to explore the prospects of alkaline membrane fuel cells (AMFCs). This type of fuel cell has more favorable reaction kinetics,
Welding aerosols have been sampled in different size fractions using a moving stage cascade impactor. Sampling has been done for different welding methods and for varying welding parameters. The elemental composition of the different size fractions have been determined by Proton Induced X-ray Emission, PIXE, combined with a nuclear method for fluorine analysis. Results show maximum mass of most el
Part of the process of rehabilitation after a brain injury is the relearning of various daily tasks such as preparing food, managing finances, getting from one place to another and so forth. These tasks require learning on all levels from physical to cognitive. Remembering a PIN code for a bank card, for example, can become automatic and ‘in the fingers’ after much repetition. However, other tasks
Utilities, such as steam or cooling water, have shown to play an important role within the process industry, since a malfunctioning utility is a plant-wide disturbance that can lead to large revenue losses due to reduced production quantities. This work focuses on identifying disturbances on utilities that give economical consequences. Measures of utility availability and area availability are int
Today embedded system development is a complex task. To aid the engineers new methodologies and languages are emerging. During the development the system is modelled using different tools and languages. Transformations between the models are traditionally done manually. We investigate the automation of this process, specifically we are looking at automatic UML to SystemC transformation. In this pa
In this paper we study the propagation problem of a time harmonic electro- magnetic field inside a cavity filled with a generic bianisotropic medium. We define the concepts of eigenfrequencies and modes of the cavity and we prove their existence and countability. We extend, in this respect, the theory for the isotropic, homogeneous, lossless cavity.
This submission is devoted to optimization of networks that permanently experience fluctuations of the capacity available on their links. This is an important and novel topic since limited link availability is a fundamental feature in wireless networks and yet majority of work in survivable network design is restricted to the total single link failures. We assume a given finite set of network stat
This dissertation aims to investigate the social situation at school for students that have migrated to Sweden during their last four years at compulsory school or during upper secondary school. The study investigates the social interaction between students with a special focus on the possibilities and hindrances for inclusion of the newcomer immigrant students in different groupings at school, an
In this paper we study the propagation problem of a time harmonic electromagnetic field inside a cavity filled with a generic bianisotropic medium. We define the concepts of eigenfrequencies and modes of the cavity and we propose a method to prove their existence and countability. We extend, in this respect, the theory for the isotropic, homogeneous, lossless cavity.
Today almost every system or service, e.g., water, power supply, transportation, etc. is dependent on IT systems, and failure of these systems have serious and negative effects on the society. IT incidents are critical for the society as they can stop the function of critical systems and services. Moreover, in a software engineering context risk analysis is an important activity for the developmen
