The desert locust, Schistocerca gregaria, is a polymorphic insect that occurs in two morphological and physiological distinct phases, solitary and gregarious, depending on population density. The two phases are reversible at any developmental stage. The gregarious phase produces and uses stage-specific pheromones, that keep the swarm together. In my thesis, I investigated the functional morphology

Because of deflections under load, contacts on tooth flanks can occur outside the theoretical plane of action between non-conjugated profiles especially when tooth modifications are not appropriate. The main objective of the present paper is to introduce an original model of the dynamic behavior of spur gears when submitted to these particular meshing conditions. The pinion and the gear of the pai

I Skåne kan klimatförändringarna förbättra förutsättningarna för produktion av grödor och annan biomassa via förlängd växtsäsong och ökad tillväxt. Samtidigt ökar dock risker för skador, sjukdomar och insektsangrepp. En intensifiering av jordbruk för att ta vara på ökad produktionspotential och för att möta ett ökat behov av biomassa riskerar att förvärra problem som redan finns när det gäller fö

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Popular Abstract in Swedish Muskulaturen i livmoderns vägg har en uttalad förmåga att dra ihop sig och dessa muskelkontraktioner spelar stor roll vid olika fysiologiska processer t.ex. vid befruktningen och för transport av ägg och spermier. Kontraktionerna i livmodern under förlossning är smärtsamma och benämns följaktligen "värkar". Vid menstruationssmärta är sammandragningar i livmodern också aWith a view to the aetiology and treatment of preterm labour and primary dysmenorrhoea we studied the influence of sexual steroids on the plasma levels of oxytocin and vasopressin, effect of these peptides on uterine contractility in vitro and in vivo, receptor concentrations and antagonists to oxytocin and vasopressin. In postmenopausal women oestrogen increased the concentrations in plasma of bo

This thesis examines the links developing between the universities and their regions in the globalising knowledge economy as observed in the UK. It examines institutional responses to two realms of policies, namely, higher education policy and regional development policy. The diversifying missions of universities, especially, the ‘third stream activities’ promoted by the UK government since the la

Bröderna Ernst och Friedrich Georg Jünger var samtidsvittnen som iakttog, uttydde och kommenterade 1900-talet i dess olika faser och händelseförlopp. Bådas liv och verk utgör i hög grad en löpande kommentar till det gångna århundradet.

Jet engine noise is an environmental problem that needs to be addressed. Several methods to reduce the jet noise have been proposed in the last decades. The main issue is to find methods that reduce noise without causing considerable loss of thrust. Experimental and computational tools are mandatory in successfully reducing jet engine noise emissions. One of the challenging issues of computing the

Both gender equality and education policy are important priorities on the political agenda in Europe. The Research and Training Network ”Women in European Universities” focuses on higher education and women’s career-perspectives in systems of higher education of seven European countries (Austria, France, Germany, Poland, Spain, Sweden and the United Kingdom). The main focus of the project is to ex

Large-scale star formation in disk galaxies is hypothesized to be driven by global gravitational instability. The observed gas surface density is commonly used to compute the strength of gravitational instability, but according to this criterion, star formation often appears to occur in gravitationally stable regions. One possible reason is that the stellar contribution to the instability has been

Psychological disability caused by stress is likely to affect cognitive and emotional functions, such as memory, attention, concentration, and decision making. These functions are essential in a train driver’s work, who is responsible for his or her own and others’ safety, and for this purpose requires optimal work capacity. Eighteen train drivers, 40 – 56 years old, most of them with long work ex