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This paper discusses recent advances that have been made in the field of psychometrics, specifically, the application of Rasch analysis to the instrument development process. It emphasizes the importance of assessing the fundamental scaling properties of an instrument prior to consideration of traditional psychometric indicators. The paper introduces Rasch analysis and shows how it has been applie
Hematopoietic stem cells (HSCs) compose a rare population of undifferentiated cells, residing in the bone marrow of adult individuals, ensuring life-long maintenance and replenishment of the blood system. This fantastic achievement is possible owing to two special characteristics of the HSCs: their ability to make copies of themselves (self-renew), and their capacity to differentiate to all lineag
We urgently need to move from a fossil-based to a bio-based society. From a Swedish perspective, a promising way forward are biorefineries with an integrated production of materials, chemicals, and energy from the softwood species Scots pine (Pinus sylvestris) and Norway spruce (Picea abies). A diverse set of process routes will be necessary to produce all intermediates and commercial products. In
Popular Abstract in Swedish I Big Bang skapades 3 grundämnen: H, He, och spår av Li. Alla andra grundämnen har bildats i stjärnor. Lågmassiva stjärnor som vår sol kan genom kärnreaktioner skapa grundämnen upp till och med syre i det periodiska systemet, medan mer massiva stjärnor kan skapa grundämnen ända upp till järn. Tyngre grundämnen än järn produceras in slutstadierna av stjärnornas liv, tillAll the elements heavier than Li are created during stellar evolution. Even if our knowledge of this process is good, many questions still remain. For instance, the odd-Z iron-peak elements Sc, V, Mn, and Co together with neutron-capture elements Sr, Zr, La, Ce, Nd, Sm, and Eu have still unclear production sites because theoretical models and observational evidences are not in agreement. Having a
This chapter focuses on the use of doped carbon nanomaterials in catalysis. The availability of carbon nanotubes in the ‘90s and graphene about 10Â years later, prompted the development of fundamental research and novel nanotechnologies. We discuss this topic from a point of view that links fundamental surface science to the field of catalysis, in order to present the state of the art.
The pulp and paper industry is one of the most important industrial sectors worldwide. The focus of current pulp mills is on the production of cellulose pulp fibres and electricity. By converting traditional pulp mills into biorefineries they can be a keystone in a future bioeconomy based on renewable resources instead of fossil fuels. In order to achieve this, pulp mills have to close their loops
With a commitment to a relational ontology, scholars from within the feminist care tradition of animal ethics have been able to theorize how our moral significance - as well as our moral obligations to others - arise from the metaphysical and empathetic 'entanglements. Independent of species, gender and the like, we exist as embodied beings. Sharing a position that originates in nonwestern culture
Teachers in Social Studies can benefit from geographical perspectives in their teaching of Social Studies in elementary and high school. The aim is to connect geographical perspectives to various social processes and to integrate it in teaching of Social Studies. But how can the relevance of geographical perspectives in an education for teachers in Social Studies be motivated and to what benefits
Den svenska lagen på upphandlingsområdet för den klassiska sektorn, lagen om offentlig upphandling (LOU), bygger på upphandlingsdirektiv grundande på EU-fördragets bestämmelser om fri rörlighet för varor och tjänster. Rättsmedelsdirektivet, direktiv 89/665/EEG, som syftar till att säkerställa efterlevanden av upphandlingsreglerna, tillkom i början av 90-talet. Direktivet lämnade dock stort utrymmeThe Swedish law on procurement is based on Community Directives on public procurement establishing fundamental EU Treaty principles such as the principles of free movement of goods and services. The Remedies Directive (89/665/EEC), entering into force in the beginning of the 90´s, was adopted to ensure that effective and rapid remedies are available to aggrieved bidders. However, the directive let
This study explores entrepreneurial decision-making with respect to non-analytic and analytic behaviour among novice and expert entrepreneurs. In order to understand and categorise subcomponents, or strategies, of these two styles of decision-making think-aloud protocols were used. By exploring and comparing behaviour within various entrepreneurial scenarios, and segmenting it using precise catego
In this paper we investigate the LHC potential for discovering doubly charged vector bileptons considering the measurable process p, p -> e(-/+) e -/+ mu(+/-) mu(+/-) X. We perform the study using four different bilepton masses and three different exotics quark masses. Minimal LHC integrated luminosities needed for discovering and for setting limits on bilepton masses are obtained for both 7 and 1
Popular Abstract in Swedish Sedan 1900-talets början har jordens medeltemperatur ökat med ca 0.9 grader, vilket bland annat resulterat i mer extremt väder, varmare världshav och att världens isar smälter med översvämningar av kustregioner som följd. Det är numera accepterat att denna temperaturökning med stor sannolikhet beror på människans utsläpp av växthusgaser, ex koldioxid (CO2). KoncentratioThe thesis work was performed with the aim of increasing knowledge and understanding of the combustion of oxygenated fuels and intermediates. This was accomplished in two steps: experimental measurements of the laminar burning velocity to expand current databases and development of a reaction mechanism. In the first part of the project, the laminar burning velocity of oxygenated fuels and interme
This paper presents a decomposition strategy applicable to DAE constrained optimization problems. A common solution method for such problems is to apply a direct transcription method and to solve the resulting non-linear program using an interior point algorithm, where the time to solve the linearized KKT system at each iteration is dominating the total solution time. In the proposed method, the s
Extensive changes in public organizations have been carried through since the end of the 20th century as a way of achieving higher efficiency. Inspiration came from the private sector. The Swedish Enforcement Authority carried through several organizational changes during this time. The authority was during 1997-2006 organized in ten independent authorities subordinated to the National Tax Board.
Ergonomics are, in most cases, focusing on the human being when evaluating assembly system designs. This results in the human performance being expressed isolated from the technical environment. On the other hand, technicians are prone to concentrate on the hardware. These conditions underline the need to pursue a more integrated evaluation and design procedure in order to avoid the drawbacks of t
It has been observed that some of the rules in a generative grammar of a language reflect changes that have occurred in the language and furthermore that the order of applying some rules reflects the chronology of the historical changes. 1 The synchronic grammar may reflect changes of various time depths and does not mirror the whole history or a certain period of the history completely. Some rule
