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Intra cerebral tumours were inoculated into the brain of Fischer-344 syngeneic rats. After one week they were treated with either 5 or 15 Gy of Co-60-gamma radiation. The first immunization was given 1 hour before the radiation treatment and then two more times with 14-day intervals. Immunization was performed with 3 x 10(6) radiation sterilized IFN-gamma secreting tumour cells (N29) injected intr

In market-driven software development it is crucial to produce the best product as quickly as possible in order to reach customer satisfaction. Requirements arrive at a high rate and the main focus tends to be on the functional requirements. The functional requirements are important, but their usefulness relies on their usability, which may be a rewarding competitive means on its own. Existing met

This paper concerns the unifying framework to strictly contractive extension problems, which is usually referred to as the band method. The solution to the so-called strictly contractive extension problem in this abstract framework, when applied to a certain concrete case, yields a complete characterization of solutions to the sub-optimal Nehari problem. The sub-optimal Hankel norm approximation p

A common approach to distributed control design is to impose sparsity constraints on the controller structure. Such constraints, however, may greatly complicate the control design procedure. This paper promotes an alternative structure, which is not sparse, yet might nevertheless be well suited for distributed control purposes. The structure appears as the optimal solution to a class of coordinati

Ultra-wideband (UWB) communication is a potential technique for future high-speed networks. In this paper, we investigate low complexity signal detection approaches for OFDM based UWB systems. In particular, we develop practical approaches for channel estimation and interference suppression. Computer simulation results show that these techniques can be effectively used in OFDM based UWB systems fo

In many reports the improvements of the actors in the construction sector have been requested. One explicit factor that has been called for is an increase in cooperation and communication between the different actors. The Swedish construction sector in general has not been swift in accepting new process improvements as they have been put forward by academics or government. There are many possible

A very large majority of the current product development process models put forward in textbooks present a homogenous structure, what Ulrich & Eppinger [1] call the market-pull model, presented as a generic one, while other possible product development process models are merely seen as variants. This paper focuses on the task clarification and derived activities (mainly the systematic search f

This article outlines a numerical study on the benefit of using High-Performance/Strength Concrete for fabrication of concrete elements. For this purpose a comparison is done between the cost of existing beams with normal strength concrete and optimized beams made of High-Performance/Strength Concrete. A background is given concerning the most essential properties of High-Performance/Strength Conc

Packaging is becoming increasingly important from a marketing as well as logistics perspective, particularly for actors in consumer product supply chains. However, the role of packaging in creating or contributing to the competitive advantage of a company or a whole supply chain is still unexplored to a large extent. This is even the case in businesses where research has shown the benefits of cons

When the replacement of an existing building by a new one is financially restrictive or not possible for any reason, refurbishment can be the only option. The refurbishment of a non-residential building may require a specialized study, not only because of building location, use, importance and historic significance, but also because it provides the opportunity to take measures to reduce energy con

We prove that there are 3-CNF formulas over n variables that can be refuted in resolution in width w but require resolution proofs of size nω(w). This shows that the simple counting argument that any formula refutable in width w must have a proof in size nO(ω) is essentially tight. Moreover, our lower bounds can be generalized to polynomial calculus resolution (PCR) and Sherali-Adams, implying tha

An active line of research in proof complexity over the last decade has been the study of proof space and trade-offs between size and space. Such questions were originally motivated by practical SAT solving, but have also led to the development of new theoretical concepts in proof complexity of intrinsic interest and to results establishing nontrivial relations between space and other proof comple

AbstractIn this study visual representations of the concept of pressure in five physics textbooks for lower secondary school have been analysed in terms of how they communicate the concept of pressure, and also how these representations work together to explain what pressure is. Examples of visual representations are fonts, photographs, sketches, tables or mathematic formulas. The analysis will an

Problemställning: Vilka är de interna samt externa kritiska faktorer som skall tas hänsyn till, vid fastställandet av en Time pacing-rytm? Syfte: Syftet med uppsatsen är att klargöra vilka interna och externa faktorer som är kritiska, av största vikt, för fastställandet av en Time pacing-rytm i ett företag. Dessutom ämnar vi ordna dessa faktorer i en modell som skall hjälpa företag vid fastställan