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Physics of attosecond pulses produced via high harmonic generation

The physics of extreme ultraviolet attosecond pulse trains generated during the interaction between an intense laser pulse and a gas medium is presented, including a simple model based on the solution of the classical equations of motion of an electron in an oscillating laser field. The reconstruction of attosecond beating by the interference of a two-photon transition is described and used to det

Highly range-resolved ammonia detection using near-field picosecond differential absorption lidar

Ammonia detection is highly relevant for combustion in boilers and furnaces since NH3 is able to suppress nitric oxide levels by catalytic as well as non-catalytic reduction. The mixing of ammonia with flue gases is an important parameter to obtain efficient non-catalytic reduction. In this paper picosecond DIAL was used for range-resolved, single ended, NH3 detection, utilizing a tunable picoseco

Emerging aspects of nanotoxicology in health and disease: From agriculture and food sector to cancer therapeutics.

Nanotechnology is an evolving scientific field that has allowed the manufacturing of materials with novel physicochemical and biological properties, offering a wide spectrum of potential applications. Properties of nanoparticles that contribute to their usefulness include their markedly increased surface area in relation to mass, surface reactivity and insolubility, ability to agglomerate or chang

Linking the input to the output: new sets of neurons complement the polarization vision network in the locust central complex.

Polarized light is a key feature of the blue sky, used by many animals as a sensory cue for compass navigation. Like other insects, locusts perceive the E-vector orientation of polarized light with a specialized region of their compound eye, the dorsal rim area. Neurons in the brain relay this information through several processing stages to the central complex. The central complex has a modular n

Barnskötarna, förskollärarna och det förtydligade pedagogiska uppdraget

Syftet med rapporten var att med utgångspunkt i den reviderade versionen av förskolans läroplan, Lpfö 98, belysa hur man som yrkesverksam i förskolan upplever den numera framskrivna och allt tydligare åtskillnad i uppdrag mellan förskolans olika yrkeskategorier, främst förskollärare och barnskötare. Vidare belyser rapporten förskolepersonals tankar och åsikter kring förskolechefens uppdrag: - Hur

The role of body size in ecological diversification and reproductive isolation in a sister species pair of triplefin fishes

The effect of body size on spatial resource competition and reproductive isolation was examined in a sister species pair of subtidal triplefin fishes (F. Tripterygiidae) in New Zealand. Ruanoho decemdigitatus and Ruanoho whero have overlapping sympatric distributions and differ in body size, attaining a total length of 12 cm and 9 cm, respectively. R. decemdigitatus was most commonly found in shel

Knowledge as Action : An Anthropological Study of Attac Sweden

The purpose of this thesis is to examine knowledge production around globalisation and politics in Attac Sweden. As a part of the global justice movement that emerged in the 1990s, the organisation Attac Sweden related to a larger process. Attac Sweden was also central in debates about globalisation in the Swedish political context around the years 2000 and 2001. This study is based both on ethnog

Bleeding and first-year mortality following hip fracture surgery and preoperative use of low-dose acetylsalicylic acid: an observational cohort study

Background: Hip fracture is associated with high mortality. Cardiovascular disease and other comorbidities requiring long-term anticoagulant medication are common in these mostly elderly patients. The objective of our observational cohort study of patients undergoing surgery for hip fracture was to study the association between preoperative use of low-dose acetylsalicylic acid (LdAA) and intraoper

Syntaktisk variation och förändring : En studie av subjektslösa satser i fornsvenska

The topic of this thesis is subjectless clauses in Old Swedish (1225–1526). The thesis focuses on referential subjects, and addresses the problem of why the possibilities to leave out such subjects have been reduced during the history of Swedish. The dissertation consists of three main parts, divided into eight chapters. In the first part, chapters 1–3, the aims are presented and a theoretical bac

Kategoriseringar av barn i förskoleåldern : Styrning & administrativa processer

The present thesis investigates, analyses and critically discusses the manner in which children with special needs are categorised in the Swedish preschool. The emergence of the category and its construction depends on a number of “truths” concerning children, related to historical and cultural processes in society. A main focus of the thesis is to investigate how legitimacy is established for the