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Karlstad, Sweden

Karlstad University is a state university in Karlstad, Sweden. The university, being a former university college was granted university status in 1999 by the Government of Sweden. Originally it was a branch of the University of Gothenburg. There are about 50 training programmes, 20 programme extensions and 800 courses within humanities, social studies, science, technology, teaching, health care and arts. As of today, it has approximately 12,500 students and 1,200 employees. Its university press is named Karlstad University Press.Service Research Center , or "CTF", at Karlstad University is one of the world's leading research centers focusing on service management and value creation through service.On March 26, 2009 the faculty of Economics, communication and IT formed Karlstad Business School as a brand of their educational programmes in the business related areas.Karlstad University has two a cappella groups, Sällskapet CMB and Söt Likör. Many students live at the nearby student accommodation facilities called Unionen and Campus Futurum.The motto of the University is Sapere aude . Wikipedia.

Gustas R.,Karlstad University
International Journal of Information System Modeling and Design | Year: 2010

Information systems can be conceptualized in a number of ways. Most methodologies propose to analyze separately process and data semantics by projecting them into totally different diagram types. This system analysis and design tradition is very strong in most modeling approaches such as structured analysis as well as object-oriented design. Structural and behavioral aspects are complementary. They cannot be analyzed in isolation. Lack of a conceptual modeling approach, which can be used for verification of semantic integrity among various types of diagrams, is the cornerstone of frustration for information system architects. Inconsistency, incompleteness and ambiguity of conceptual views create difficulties in verification and validation of technical system architectures by business experts, who determine the organizational strategies. Consequently, the traditional information system methodologies are not able to bridge a communication gap among business experts and IT-system designers. Various interpretations of semantic relations in conceptual modeling approaches make the system analysis and design process more art than science. It creates difficulties to formulate comprehensible principles of decomposition and separation of concerns. Unambiguous definition of aggregation and generalization is necessary for breaking down information system functionality into coherent non-overlapping components. This article concentrates on conceptual modeling enhancements, which help to avoid semantic integrity problems in conceptualizations on various levels of abstraction. The presented conceptual modeling approach is based on a single type of diagram, which can be used for reasoning on semantic integrity between business process and data across organizational and technical system boundaries. Copyright © 2010, IGI Global. Source

Uggla C.,Karlstad University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2013

In this paper we investigate the global dynamics for the minimally coupled scalar field representation of the modified Chaplygin gas in the context of flat Friedmann-Lemaître-Robertson Walker cosmology. The tool for doing this is a new set of bounded variables that lead to a regular dynamical system. It is shown that the exact modified Chaplygin gas perfect fluid solution appears as a straight line in the associated phase plane. It is also shown that no other solutions stay close to this solution during their entire temporal evolution, but that there exists an open subset of solutions that stay arbitrarily close during an intermediate time interval, and into the future in the case when the scalar field potential exhibits a global minimum. © 2013 American Physical Society. Source

Soderstrom T.,Uppsala University | Mossberg M.,Karlstad University
Automatica | Year: 2011

A system identification method for errors-in-variables problems based on covariance matching was recently proposed. In the first step, a small amount of covariances of noisy inputoutput data are computed, and then a parametric model is fitted to these covariances. In this paper, the method is further analyzed and the asymptotic accuracy of the parameter estimates is derived. An explicit algorithm for computing the asymptotic covariance matrix of the parameter estimates is given, and the identification method is shown to be asymptotically statistically efficient assuming that the given information is the computed covariances. As an important byproduct, an efficient algorithm is presented for computing the covariance matrix of the computed inputoutput covariances. © 2010 Elsevier Ltd. All rights reserved. Source

A number of factors may affect student interaction in an asynchronous online discussion forum used in learning. This study deals with student preferences for the subject line of messages and in what ways the choice of subject line contributes to coherence and interaction reflected in the textual and interpersonal functions of the linguistic items used. The study also attempts to determine what affects the choices made by participants. Nine separate discussion forums from three different undergraduate courses in English at a Swedish university were used in the study. A total of 98 students and 435 student messages were examined and a number of trends appeared. The functions of the subject line may be summarized as contributing to coherence by reflecting message content in a number of different ways. In addition, the subject line can perform other tasks such as maintaining social relationships among the participants. It is not clear in what ways the subject line contributes to interaction with regard to increasing the reading rate. The trends observed indicate that other factors than subject line content may contribute to whether students are inclined to access a message or not, such as when a message is posted and where it is displayed on the screen. © 2012 Elsevier Ltd. All rights reserved. Source

The objective was to test the application of a novel, non-destructive photo-method estimating the larval encystment of one of the highly threatened unionid mussels, the freshwater pearl mussel (Margaritifera margaritifera) on the gills of its host fish, brown trout (Salmo trutta). There were significant correlations between the encystment intensity based on microscope counts and using the new photo-method for both young-of-the-year and older brown trout just after the encystment in October 2007 and just before larval release from the host fish in June 2008. The mean encystment intensity based on the two methods did not differ from each other for the two age classes of trout when based on comparisons including all individuals. An aquaria experiment showed that there were no differences in survival or growth between fish subjected to the treatments: photo-method and individual marking, photo-method and a control. When applied to encystment in single streams, there were significant correlations between the mean encystment intensity in each stream based on the methods for both trout age classes. Therefore, it may be possible to get reliable estimation of the encystment rates without injuring the mussel or the host fish, which may also be used in restoration and cultivation work. Furthermore, the larvae of M. margaritifera are among the smallest of all the worldwide-distributed, threatened unionid mussel species. The photo-method may therefore also be used for other mussel species with larger larvae, as they are more easily recognized on photos. Therefore, it may now be possible to investigate every life stage of unionid species without using harmful methods at all. © 2011 Elsevier Ltd. Source

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