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In the design of concrete bridges an important aspect is limiting crack widths, since large cracks can lead to e.g. corrosion and affect the bridge functionality. Restraint forces caused by thermal loads and shrinkage will likely constitute a large part of the total forces acting on the bridge in crack width design. In this paper, restraint stresses in portal frame bridges are calculated according
Svensk Kärnbränslehantering (SKB) har som en av sina uppgifter att skapa kunskap om hur betongen i slutförvaret för kortlivat radioaktivt avfall (SFR) kommer att åldras och hur det i sin tur kommer att påverka betongbarriärens skyddande förmåga. I tre studier har därför avdelningen för Byggnadsmaterial vid Lunds Tekniska Högskola med olika experimentella undersökningar studerat hur betongens egens
Uneven exposure to e.g. solar radiation can cause temperature differences between various structural parts of a bridge, which leads to tensile stresses if the parts cannot move freely. In this study, thermal simulations and stress calculations on a model of a portal frame bridge are performed with the aim of evaluating the temperature difference between the bridge parts. It is shown that the tempe
Review article on the recent poetry of Swedish poet Christian Karlsson.
The 1870–1914 globalization period had profound impacts on the international division of labour, with coal-endowed countries specializing in the production of energy-intensive manufacturing goods and others in the production of agricultural goods. This study analyses the environmental consequences of this specialization, by quantifying the flows of energy and hidden energy embodied in the bilatera
We present the development of a specialized concrete for neutron shielding at neutron research facilities, based on the addition of hydrogen atoms in the form of polyethylene and also B4C for enhancing the neutron capture properties of the concrete. We show information on the mechanical properties of the concrete and the neutronics, in particular its relevance to modern spallation neutron sources,
Economic growth is an aspect of social change which cannot be explained by economic theory alone. McCloskey invokes ‘ideas’ but ideas only matter as embodied in institutions. Weingast makes this points but his institutions are too economistic. Only institutionalised self-emergence can explain massive, relentless and automatic change.
PURPOSE OF REVIEW: Delayed awakening after targeted temperature management (TTM) and sedation is frequent among cardiac arrest patients. Differentiating between prolonged coma and irreversible cerebral damage can be challenging, therefore the utilization of a multimodal approach is recommended by international guidelines. Here, we discuss indications and advantages/disadvantages of available modal
Introduction: Lobectomy is the standard curative treatment for non-small cell carcinoma (NSCLC) of the lung. Most studies on lobectomy have focused on short-term outcome and 30-day mortality. The aim of this study was to determine both short-term and long-term surgical outcome in all patients who underwent lobectomy for NSCLC in Iceland over a 24-year period. Material and methods: The study involv
Background: Practice guidelines for childhood posttraumatic stress disorder (PTSD) recommend trauma-focused psychotherapies, mainly cognitive behavioral therapy (CBT). Eye movement desensitization and reprocessing (EMDR) therapy is a brief trauma-focused, evidence-based treatment for PTSD in adults, but with few well-designed trials involving children and adolescents. Methods: Weconducted a single
Strongly interacting one-dimensional (1D) Bose-Fermi mixtures form a tunable XXZ spin chain. Within the spin-chain model developed here, all properties of these systems can be calculated from states representing the ordering of the bosons and fermions within the atom chain and from the ground-state wave function of spinless noninteracting fermions. We validate the model by means of an exact diagon
Logistik är ett ämnesområde som får allt större betydelse i allt fler branscher. Logistik sägs ha initierats av Napoleon då han utförde militära insatser på 1800-talet. För att klara matförsörjningen för sina militärer och för att underhålla den utrustning som fördes med trupperna så var han tvungen att ta med smeder, kockar och andra hantverkare som kunde försörja trupperna med mat och återställa
Diffractive excitation is a large fraction of the pp cross section, also at high energies. Diffraction has been described by multi-Regge diagrams, or in the Good-Walker formalism as a result of fluctuations. The two formalisms are, however, just different sides of the same phenomenon. The dipole cascade formalism in impact parameter space is well suited to describe diffractive excitation including
