Various physical limitations in electromagnetic theory and antenna theory have received considerable attention recently. However, there are no previous limitations on the scattering of higher order electromagnetic vector spherical waves, despite the widespread use of spherical wave decompositions. In the present paper, bandwidth limitations on the scattering matrix are derived for a wide class of

Evaluating the user experience is often done in a laboratory. Methods for observing what happens in the wild are nonetheless being employed because they bring results that the traditional methods of evaluation do not yield. In this paper we describe and discuss methods used at our lab for understanding the mobile user experience. These methods range from quantitative to qualitative evaluation, and

How early can software quality be evaluated and how can it be done? As for quality requirements, several solutions have been proposed in the literature. In spite of the criticism, the ISO/IEC9126 standard has been widely adopted for software quality measurement throughout entire software development life-cycle. Other approaches usually focus on evaluating only some of the quality characteristics a

Industry convergence – the merger of hitherto separate industries – is a phenomenon that has had a profound effect on several industries and received considerable interest among practitioners and business press over the past decades. Despite this, industry con- vergence has only received limited attention from the academic management field, al- though an emergent discussion on convergence can be i

Det var mycket vi inte trodde oss veta innan en amerikansk dataanalytiker tog sin hårddisk och flydde undan världens kanske mäktigaste underrättelsetjänst. Man skulle också kunna lägga till ett ”ännu”. För det kan förstås ändras med tiden. Ingen lyssnar på vad vi säger till varandra. Ingen läser vad vi skriver till varandra. Ännu. Puh.

One of the common tools for studying the deformation behavior of the microstructure in polycrystalline materials is crystal plasticity models. These are used to describe texture evolution and hardening due to crystallographic slip. A drawback when using crystal plasticity models is that the calculation of the slip requires solving a set of stiff differential equations for each grain in the microst

Based on information produced by a 200 kHz ultrasonic echo device developed for robotics and other industrial purposes, a method for object identification was developed and is presented in this paper. Interpretation of the echos from the reflecting objects, complexity analysis and information extraction were made by system identification methods such as impulse response analysis and state-space re

Previous attempts to construct an integrative framework for personality psychology are primarily descriptions of what the field looks like today rather than analyses of its logical structure and research possibilities. I aim to draw attention to logically important points that may help to integrate the field and suggest potentially fruitful research paths that are unrealized due to historical c

Purpose: Certain individuals need earlier perimetric experience before producing normal fields on automated static threshold perimetry. Mid-peripheral depressions and an unaffected central field are typical findings in such cases. We have devised a learner's index, to detect defect patterns that may be due to such perimetric inexperience. Methods: The central visual field was partitioned into 5 co