Sökresultat

Filtyp

Din sökning på "*" gav 526186 sökträffar

Ultrafast Electron Dynamics in Solar Energy Conversion

Electrons are the workhorses of solar energy conversion. Conversion of the energy of light to electricity in photovoltaics, or to energy-rich molecules (solar fuel) through photocatalytic processes, invariably starts with photoinduced generation of energy-rich electrons. The harvesting of these electrons in practical devices rests on a series of electron transfer processes whose dynamics and effic

Banks and Swedish financial crises in the 1920s and 1930s

Financial crises occur at regular and unpredictable moments in capitalist economies. However, an absence of shared theoretical approaches to and even definitions of the subject still plague the analysis of financial crises. This situation makes historical analysis even more important. This article compares two Swedish financial crises, one in the 1920s and the other in the 1930s. The comparison sh

The image-forming mirror in the eye of the scallop

Scallops possess a visual system comprising up to 200 eyes, each containing a concave mirror rather than a lens to focus light. The hierarchical organization of the multilayered mirror is controlled for image formation, from the component guanine crystals at the nanoscale to the complex three-dimensional morphology at the millimeter level. The layered structure of the mirror is tuned to reflect th

Lung transplantation and survival outcomes in patients with oxygen-dependent COPD with regard to their alpha-1 antitrypsin deficiency status

Background: Individuals with severe alpha-1 antitrypsin deficiency (AATD) have an increased risk of developing COPD. However, outcomes during long-term oxygen therapy (LTOT) in patients with severe AATD and hypoxemia are unknown. Patients and methods: This was a prospective, population-based, consecutive cohort study of patients on LTOT due to COPD in the period from January 1, 1987, to June 30, 2

How deformed are the TSD bands in odd Lu isotopes?

The experimental fingerprints for large deformation in the triaxial strongly deformed (TSD) bands of 163,165,167Lu are discussed. It is argued that these fingerprints are not very convincing. On the contrary, especially the fact that there exist strong interactions between the TSD bands and normal-deformed (ND) bands indicates that the deformation of the TSD bands cannot be very different from tha

Vad är en disciplin? Om det gränslösa latinet och ämnets position vid Lunds universitet

In this contribution, Göransson explores the historical background of classical philology,in particular Latin, in Sweden. Research in Latin encompasses studies on Latin of alltimes: both classical, medieval and Neo-Latin. Göransson discusses the growth of the subjectboth in the upper secondary school and in the universities in the late 1990s. Today,however, the economic system is hard on all minor

Optimization of wind turbine foundations for poor soil

One of the most important constraints on large-scale civil engineering projects is economic feasibility. All projects are restricted by the cost of construction and materials. A cost analysis of alternative foundation designs for wind turbines is done in this work to aid the choice of design solution. The suitability of different foundation types are compared including a novel solution, with a cir

Observations on the Terminology of Textile Tools in Diocletian's Edict on Maximum Prices

The Edictum Diocletiani et collegarum: The so-called Edict of Maximum Prices was issued in AD 301 as part of a comprehensive administrative and financial reform released in the reign of the Roman emperor Diocletian. Diocletian came to power in AD 284 after a period in Roman history traditionally understood as a time of ‘crisis’, produced by a series of inter-related factors: a frequent turnover of

Externally Acquired or Internally Generated? Knowledge Development and Perceived Environmental Dynamism in New Venture Innovation

We investigate the relative importance of external market knowledge acquisition and internal knowledge generation in new venture innovation. We argue that the effectiveness of externally acquired knowledge is less important in environments that are perceived as highly dynamic. To test our model, we examine 316 new ventures in one singular, high-growth sector. We find that man- agers have different