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Solar steam turbines are subject to high thermal stresses as a result of temperature gradients during transient operation, which occurs more frequently due to the variability of the solar resource. In order to increase the flexibility of the turbines while preserving lifting requirements, several operational modifications for maintaining turbine temperatures during offline periods are proposed and

As the nineteenth century turned to the twentieth, the relation between the law and the Christian church became increasingly challenged in Europe. Social claims from political forces and increasingly strong labor unions formed the introduction to the modern social welfare state. In the increasingly secularized Nordic societies, Christian philanthropy was replaced by social legal reforms in the ear

Utbildningsstyrelsen har i samarbete med undervisnings- och kulturministeriet börjat utveckla rektorsutbildningarna mera målmedvetet än tidigare, i synnerhet de utbildningsprogram för läroanstalternas ledning som finansieras via programmet Kunnig (Osaava). En åtgärd som ansetts vara nödvändig som underlag för utvecklingsarbetet har varit att kartlägga olika länders praxis för utbildning av läroansThe Finnish National Board of Education, in collaboration with the Ministry of Education and Culture, has started to develop the training of rectors in a more systematic way by utilizing the funds which were allocated for the Osaava programme. One of the pre-liminary measures in this regard included a survey concerning the continuing education practices of school leaders on a worldwide basis. The

In the last few decades it has become ever clearer that humankind faces many serious environmental challenges. As the corporate sector has been identified as an important actor to address these challenges, understanding why certain companies choose to adopt sustainability initiatives, while others do not, is an important question. However, little previous research has addressed how sustainability

Educational software based on teachable agents has repeatedly proven to have positive effects on students’ learning outcomes. The strongest effects have been shown for low-performers. A number of mechanisms have been proposed to explore this outcome, in particular mechanisms that involve attributions of social agency to teachable agents. Our study examined whether an expression of high versus low

The effect of different glutamate‐receptor antagonists on the induction of cortical spreading depression of Leao and of cortical anoxic membrane depolarization were investigated in the anaesthetized rat. Spreading depression (SD), elicited by mechanical stimulation of the cortical surface, was inhibited by the non‐competitive N‐methyl‐d‐aspartate (NMDA)‐receptor blocker, (±)‐5‐methyl‐10,11‐dihydro

The effect of cerebral ischemia on the activity of pyruvate dehydrogenase (PDH) enzyme complex (PDHC) was investigated in homogenates of frozen rat cerebral cortex following 15 min of bilateral common carotid occlusion ischemia and following 15 min, 60 min, and 6 h of recirculation after 15 min of ischemia. In frozen cortical tissue from the same animals, the levels of labile phosphate compounds,

The effect of an α-2 receptor antagonist, idazoxan, on ischemic neuronal damage in the hippocampus and neocortex was studied in rats following 10 min of forebrain ischemia. Idazoxan was given 0.1 mg/kg i.v. immediately after recirculation, followed by 48 h of continuous infusion at a rate of 10 μg/kg/min. A histopathological examination of the CA1 region of the dorsal hippocampus and neocortex fro

Changes in the levels of arachidonic acid during ischemia in selectively vulnerable areas of the hippocampus were studied in the rat brain. Since neurons in the CA1 region are more vulnerable to ischemia than neurons in the adjacent CA3 region, the release of arachidonic acid in these two regions was measured during decapitation ischemia of 4- to 12-min duration. The concentration of free arachido

This study addresses the question of whether the cyclooxygenase inhibitors indomethacin and diclofenac and the glucocorticosteroid dexamethasone ameliorate neuronal necrosis following cerebral ischemia. In addition, since these drugs inhibit the production of prostaglandins and depress phospholipase A2 activity, respectively, the importance of free fatty acids (FFAs) on the development of ischemic

This is an overview article regarding artificial intelligence (AI) and its potential normative implications. Technology has always had inherent normative consequences not least due to AI and the use of algorithms. There is a crucial difference between algorithms in a technical sense and from a social-science perspective. It is a question of different orders of normativity - the first related to th

Background: Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling.Methods: The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgi

Den andra av två artiklar rörande det fängelse, den s k proban, som Lunds universitet hade under den tid lärosätet ägde egen jurisdiktion över anställda och studenter. Denna andra del behandlar studentoroligheter under tidigt 1800-tal, den oklara frågan var proban var placerad under 1800-talet samt några av de sista studenterna att spärras in häri under 1830- och 1840-talen, dels för brott, dels s