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Many animals use vision to guide their behaviour and to collect relevant information about their environment. The diversity of visual environments and of visually guided tasks has led to a large variety of specialisations of eyes and visual systems. Our knowledge, however, about how the anatomical and physiological properties of eyes and the behavioural strategies of animals relate to the visual s

Popular Abstract in SwedishDenna doktorsavhandling har studerat förskolebarns kamratkompetens och speciellt uppmärksammat tre aspekter som är av central betydelse för barns samspel med kamrater; prosocialt beteende, aggressivt beteende och social kognition. Prosocialt beteende är handlingar som på något sätt gynnar en annan person (t ex hjälpa, trösta och dela med sig). Trots att prosocialt beteenThis doctoral thesis explored three broad aspects of preschoolers’ social competence: prosocial behavior, aggression, and social cognition. The longitudinal study followed forty-four children (initially 22-40 months), who were observed in natural peer interactions at their daycare centers during a two-month period in each of three con-secutive years. In addition, social-cognitive data were gathere

Three pyralid moths, the Mediterranean flour moth (Ephestia kuehniella), the almond moth (Ephestia cautella) and the Indian meal moth (Plodia interpunctella), infest food products all over the world and cause severe problems in factories, shops and households. For health and environmentalreasons chemical control becomes more and more restricted. We here present some promising results offering effi

After four years in the Swedish health care queues the kidney patient Sam bought a new kidney in Pakistan. But where did the new organ come from? And where the donor really voluntary? "Organs for sale" is a frightening journey through the organ trade murky world. Ethnologist Susanne Lundin is traveling around the world and witnesses the black organ market. She portrays crime syndicate in South Afr

The second order random walk (RW2) model is commonly used for smoothing data and for modelling response functions. It is computationally efficient due to the Markov properties of the joint (intrinsic) Gaussian density. For evenly spaced locations the RW2 model is well established, whereas for irregularly spaced locations there is no well established construction in the literature. By considering t

When liquid packaging board is made aseptic in the filling machine the unsealed edges of the board are exposed to hydrogen peroxide. A high level of liquid penetration may lead to aesthetic as well as functional defects. To be able to make a priori predictions of the edge wicking properties of a certain paperboard material is therefore of great interest to paper industry as well as to packaging ma

This book provides important insights into the domain of interactions between language and cognition, focusing on SPACE and expressions of SPACE. Both literal and metaphorical forms of expression are included. The research reported is carried out within the broad framework of Cognitive Linguistics, which encompasses a wide variety of empirical methods and research topics. Our approach to the const

Polyelectrolytes and polyelectrolyte complexes (PECs) are characterized by many useful properties that endow them with high potential in different areas of biotechnology. This thesis describes the development and analyses of some new systems and methods utilizing poly(acrylic acid) (PAA), poly(methacrylic acid) (PMA), poly (N-ethyl-4-vinylpyridinium bromide) (PEVP) and PMA-PEVP complexes. The mode