Gliding flight is a relatively inexpensive mode of flight used by many larger bird species, where potential energy is used to cover the cost of aerodynamic drag. Birds have great flexibility in their flight configuration, allowing them to control their flight speed and glide angle. However, relatively little is known about how this flexibility affects aerodynamic drag. We measured the wake of a ja

We measured volatile organic compounds (VOCs), carbon dioxide (CO2) and carbon monoxide (CO) at an urban background site near the city centre of Helsinki, Finland, northern Europe. The VOC and CO2 measurements were obtained between January 2013 and September 2014 whereas for CO a shorter measurement campaign in April–May 2014 was conducted. Both anthropogenic and biogenic sources were identified f

Inom fysik försöker vi beskriva naturfenomen med matematiska modeller. Beroende på vilket system som ska beskrivas är olika modeller relevanta. På väldigt långa avstånd är gravitation den viktigaste kraften. Till exempel så beskrivs solsystemets dynamik av gravitation. På de kortaste avstånd som människan lyckats studera är det istället den elektromagnetiska, den svaga och den starka kraften som äIn this thesis we use effective field thory methods and models for low energy QCD in two different contexts. One is direct calculation of contributions to the anomalous magnetic moment of the muon, muon g-2. The other is estimates of systematic sources of uncertainty in lattice QCD simulations. The work is presented in five papers. Papers II, IV and V describe calculations for muon g-2 and papers

I många forskares värld utgör seminarierummet en förtätad plats. Själva idén om det akademiska textseminariet är omhuldad, särskilt inom de humanistiska och samhällsvetenskapliga ämnesområdena. Seminariet är en väl förankrad arbetsform inom universitetet. Det är där de höga tankarna tänks och ventileras, det är där lärande och forskning går hand i hand, och det är där kollegialiteten praktiseras i

What are the underlying motivations for the conceptualization of events? Recent studies show that when people are asked to use nonverbal gestures to describe transitive events they prefer the semantic order Agent-Patient-Act, analogous to SOV in grammatical terms. The original explanation has been that this pattern reflects a cognitively “natural order” for the conceptualization of events. However

We have all experienced how a telephone conversation can be more challenging than speaking face to face. Understanding the intended meaning of a speaker‘s words requires forming an impression of the current mental state of the speaker, including her beliefs, intentions, and emotional state (Sperber & Wilson, 1995). Facial expressions are an important source of this information. In this study,

Background: Air pollution has been associated with cardiovascular mortality, but it remains unclear as to whether specific pollutants are related to specific cardiovascular causes of death. Within the multicenter European Study of Cohorts for Air Pollution Effects (ESCAPE), we investigated the associations of long-term exposure to several air pollutants with all cardiovascular disease (CVD) mortal

Background Few studies on long-term exposure to air pollution and mortality have been reported from Europe. Within the multicentre European Study of Cohorts for Air Pollution Effects (ESCAPE), we aimed to investigate the association between natural-cause mortality and long-term exposure to several air pollutants. Methods We used data from 22 European cohort studies, which created a total study pop