Filtyp
In order to treat highly localized excitations in a solid a simple spherical model has been developed. The Coulomb potential from the nucleus at the site of the excitation is treated exactly, while the potentials from the surrounding sites are turned into pseudoion pontentials. Only the spherical average of these potentials is retained and separate self-consistent calculations for the ground state
Fuel cells are promising due to advantages with higher energy conversion efficiency and lower emissions of SOX, NOX and CO2 than conventional power systems. Solid oxide fuel cell (SOFC) is a high temperature fuel cell, which operates at 600-1000 ºC. The high operating temperature and the anode material allow SOFCs to operate with different types of fuels from both fossil and renewable sources due
In language acquisition it is important to imitate the native speakers of the language. For the young child it is natural to imitate both the language and the behaviour of the culture. Imitation, or adaptation (Markham 1997), is also useful in second language acquisition to learn how to pronounce the words and to learn the prosody of the language. For most people it is difficult to learn to speak
In the present paper an iterative time-reversal algorithm, that retrofocuses an acoustic wave field to its controllable part is established. For a fixed temporal support, i.e., transducer excitation time, the algorithm generates an optimal retrofocusing in the least-squares sense. Thus the iterative time-reversal algorithm reduces the temporal support of the excitation from the requirement of neglig
Risk and vulnerability analyses are a required decision support tool in processes to improve societal safety and crisis preparedness at national, regional and local levels in several European states. Analyses result in risk images, which are the stakeholders’ views of events that must be addressed in planning processes related to topics such as land use and crisis management. Hence, risk and vulne
The aim of this study was to explore differences and similarities in health care students’ attitudes towards working with and communicating with patients about sexual health issues in their future professions. The aim was also to explore whether the students’ gender, age and future professions were influencing factors and whether there was a change in attitude depending on educational levels, gend
Aluminium-titanium (Al/Ti) composite sheets were fabricated via asymmetric accumulative roll bonding (AARB), which capitalises on additional shear to enhance plastic deformation. Multi-layers of Al alloy (AA1050) and commercially-pure Ti sheets were alternatively stacked and rolled-bonded with varied roll diameter ratios (dr) ranging from 1 to 2, for up to four passes. Annealing of selected compos
Purpose – The purpose of this paper is to explore the brand core and its management over time. The aim is to develop a framework for managing the core of a brand for continuity and change. Design/methodology/approach – A longitudinal case study of the Volvo brand’s core and its management serves as the empirical basis for a qualitative analysis of the “brand core” using rhetorical perspectives. Fi
Laser-induced fluorescence measurements have been performed in turbulent non-premixed flames close to the lift-off point and in laminar premixed acetylene flames. The spectrally analyzed fluorescence signal showed good correspondence to known spectra from glyoxal (C2H2O2). Laser-induced fluorescence spectra from glyoxal vapor using the same excitation wavelength of 428 nm showed the same strongest
It is well known that Max-Weight type scheduling algorithms are throughput optimal since they achieve the maximum throughput while maintaining the network stability. However, the majority of existing works employing Max-Weight algorithm require the complete channel state information (CSI) at the scheduler without taking into account the associated overhead. In this work, we design a Scheduling and
n order to protect their food from competitors, ball-rolling dung beetles detach a piece of dung from a pile, shape it into a ball, and roll it away along a straight path [1]. They appear to rely exclusively on celestial compass cues to maintain their bearing [2, 3, 4, 5, 6, 7 and 8], but the mechanism that enables them to use these cues for orientation remains unknown. Here, we describe the orien
The Swedish Orthopaedic Society held its meeting on September 10-12,1986, in Östersund, which is situated on a large lake in central Sweden. This year, Ostersund celebrated its bicentennial; but more than 1,000 years ago the Vikings had a center here to worship their gods, as well as a fortress on the neighboring island of Frösö. Today, Östersund is the gateway to Sweden's most popular winter recr
Sustainability professionals are agents for change towards sustainable development. Such professionals require knowledge from a variety of disciplines, but also competencies to accomplish real-word change. This article evaluates an innovative course, Strategic Environmental Development, which immerses students in a real-life solution-oriented consultancy project in order to develop critical sustai
Corporate Social Responsibility (CSR) has been customarily seen as an inherently voluntary corporate endeavour that inhabits the area stretching ‘beyond compliance’ with law. However a growing number of writers and practitioners deem this understanding of CSR inaccurate and unproductive. In this article CSR as ‘beyond compliance’ is questioned from logical, descriptive and normative points of view
Popular Abstract in Swedish Denna avhandling handlar om modeller inom partikelfysik, vilka beskriver naturens minsta beståndsdelar. En atom består av en kärna och elektroner. Kärnan består av protoner och neutroner, vilka i sin tur består av kvarkar och gluoner. Dessa partiklar samt hela den flora av andra partiklar som bara går att skapa vid experiment är vad som studeras inom partikelfysiken. DThis thesis considers models for describing high energy particle collisions. Existing phenomonological models are modified and new implementations made in order to achive a better description of states with several hard jets. To predict final state hadrons, parton showers are used together with pheonomenological hadronization models. These models describe a wide range of observables, but have the
Previous research has consistently found demographic responses to grain price fluctuations in preindustrial Europe, both at macro and micro level. Grain prices serve as a summary measure of the workings of the preindustrial economy, reflecting not only local harvest conditions but trade patterns and market integration. All over preindustrial Europe the manorial estate was an important institution
The metabolite produced by one enzyme in a metabolic pathway can be transferred to the next enzyme in the pathway by free diffusion via solution or by channelling in an enzyme-enzyme complex without prior release of the metabolite to solution. While metabolite channelling is known to occur in systems where stable multienzyme complexes form, conflicting views have been expressed as to its existence
