Sleep is a universal and complex state and it is widely agreed that this state is present in every animal species. However, the evolutionary origins of sleep remain ignored or misunderstood, which has led researchers to study, in various species, this common behaviour of all living organisms. Sleep is commonly studied at various levels under laboratory conditions, using tethered devices which reco

Brent geese, Branta bernicia hrota, were equipped with satellite transmitters on a spring stop-over site in Iceland. The brent geese deposit heavy fuel reserves for long-distance flights across the high Greenland ice-cap to breeding destinations in north Canada. Satellite tracking of brent geese on this journey serves the twofold purpose of testing specific predictions about: (i) size-dependent po

Stopover duration and fat accumulation were studied during autumn migration at two sites near Ottenby, Oland, SE Sweden in 1985 and 1986. Post juvenile moult was scored on juvenile birds. In several of the species fat class and body mass increased with day of season (thrush nightingale Luscinia luscinia, barred warbler Sylvia nisoria, and whitethroat S. communis), while in the lesser whitethroat S

Brent Geese migrating in spring towards Arctic Canada have been tracked by satellite from Iceland to the Davis Strait. Length and direction of the stages were adapted to the geographic features and hospitability of the areas crossed; the ice-cap of Greenland was overflown in its southern part.

The orientation of four species of passerine long-distance migrants was studied in spring and autumn by orientation cage experiments during the twilight period after sunset in Sweden. Two groups of migrants from the Palaearctic-African migration system were used: migrants wintering mainly north of the magnetic equator in west Africa (pied flycatcher, Ficedula hypoleuca, and redstart, Phoenicurus p

Background: The motivation of birds to proceed with migration is associated with both endogenous and exogenous factors. According to their migratory situation and to the characteristics of stopover sites, birds might exhibit migratory motivation differently among sites. Although migratory motivation of migrating birds has been well stud-ied in many species, the investigation of the same species in

In many migratory birds, males precede females during migration and arrival at the breeding sites. Three proximate mechanisms are proposed to explain this phenomenon of protandry: males 1) winter closer to breeding sites, 2) start spring migration earlier, and/or 3) migrate faster than females. So far, the relative contribution of these mechanisms to protandry is unknown. The present study investi

Ringing recoveries from 18 different passerine species captured at an inland ringing site in south Sweden (Kvismare Bird Observatory) were analysed with respect to direction and distance of migration in order to investigate the occurrence of temporary reverse movements opposite to the expected forward migratory direction towards south and south-west in autumn. The data demonstrate that movements i

Neural firing rates are thought to represent values which code information. There are drawbacks with using biophysical events to represent numbers. (1) Rate code (like any sequence) is inherently slow to read. (2) At short intervals, the code becomes unintelligible biophysical noise. (3) Transmission times. The vital contribution of the cerebellum to skilled execution and coordination of movements

In elite sport, athletes and staff may face unique personal- and sports-related stressors that can both bolster and undermine their mental health. Meanwhile, toughness, perfectionism, stigma, and unwanted attention can serve as exacerbating factors and help-seeking deterrents. Two outpatient psychiatric clinics specializing in elite sport and health have been established in Sweden, including one i

Acute Achilles tendon rupture can be treated both surgically and by immobilization in plaster alone. We have used the latter approach, since it has been shown that results are almost equivalent, but with fewer complications. In both cases, patients are often immobilized for many weeks, although treatment which encourages movement has been used in operated cases. The physiology of tendon healing wo

Static code checkers are tools that help software engineers by automatically finding defects without executing the programs. These tools contain a set of detectors that rely on static program analyses to find common programming defects or to enforce coding guidelines.While existing code checker frameworks package a rich collection of detectors, aimed at common bug defects, the effort to adapt thes

This thesis explores the relationship between AI, security, and social sustainability as a sociotechnical system, analyzing the implications and perspectives that arise from this understanding. It represents a culmination of four articles that rely on both conceptual insights and empirical findings. The articles incorporate diverse perspectives to enhance the comprehension of AI’s effects on socia

In recent years, the prevalence of idiopathic pulmonary fibrosis (IPF) and post-COVID-19 pulmonary fibrosis has risen. Nevertheless, effective diagnostic and prognostic biomarkers alongside targeted treatments are lacking, making lung transplantation the last resort for many patients with end-stage disease. However, bronchiolitis obliterans syndrome (BOS), a manifestation of chronic lung allograft

Artikel om Sverker Oredssons gärning som historiker.

In this article, I examine and compare how the book of Esther is interpreted on two Swedish and one US based online discussion forums (Familjeliv, Flashback, and Reddit). The study is conducted from a reception critical perspective, highlighting dominant interpretations and their ideological consequences, such as the reproduction of relations of domination. While religious actors tend to praise Es

Avtal kan innehålla otydligheter som gör att det blir nödvändigt med en tolkning. De kan också vara ofullständiga på ett sätt som gör att de måste fyllas ut med lagbestämmelser. Det här gäller givetvis även avtal som slutits efter att beslut om kontraktstilldelning fattats efter en genomförd offentlig upphandling. Varken upphandlingsdirektiven eller den svenska lagstiftningen tar ställning i fråga

Landscape-scale land use is important in driving species communities and interactions. However, despite increasing concerns regarding the ecological consequences of insect declines, our understanding of how the relative proportions of different land cover types influence insect herbivory in species-rich semi-natural habitats remains limited. This study assessed leaf, stem, and flower herbivory acr