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Friction-related problems are frequently encountered in control systems. This thesis treats three aspects of such problems: modeling, analysis, and friction compensation. A new dynamic friction model is presented and investigated. The model is described by a first order nonlinear differential equation with a reasonable number of parameters, yet it captures most of the experimentally observed frict
A noninvasive 133-xenon washout technique was used to evaluate the ventilation of the paranasal sinuses in healthy subjects and in patients with sinus disease. A mixture of air and 133-xenon is insufflated into the nasal cavities and passage into the sinuses is facilitated by a pressure increase created by letting the subjects inflate a balloon. A scintillation camera allowing single photon emissi
Water column and sediment profiles of plutonium, americium, thorium and uranium have been obtained in the superanoxic Framvaren fjord, southern Norway. The concentrations of bomb test fallout Pu, Am as well as 'dissolved' Th in the bottom water are the highest recorded in the marine environment. The behaviour of the actinides in the anoxic water mass is to a large extent governed by the behaviour
The spectrum and energy levels C IV and the 3l4l' system of the Mg-like ions in the iron group elements has been investigated. This has led to several hundred identified transitions, many of them previously unknown. Using the Charge Exchange diagnostic system at JET, ion temperatures, rotation velocities and densities have been derived from visible spectroscopic measurements on fully ionised light
This thesis deals with the recent discourse about Hittite ritual and religion and assumes an alternative approach. It analyses how the most important researchers in the fields of Hittitology and History of Religions, who have been working with Hittite rituals and religion, describe and explain the rituals. Their implicit or explicit theories underlying the discourse are explored. The restraining e
Risk analysis and intervention planning are important in fire prevention and risk management strategies. This study has shown that it is possible to use fire safety engineering models to estimate the development of fires on a realistic scale, and the corresponding requirement for extinguishing media. Data from the London Fire Brigade (UK) were used to investigate a possible correlation between the
Although there is a fairly large number of books and articles concerning the validation of technical measurement systems, there are only a few which take into account the whole measurement system consisting of both technical and non-technical aspects. A measurement system comprises both the measurement process and the human being who conducts the measurement. In this way, the human being may be a
One of the major issues in the pharmaceutical industry today is the cost of development and validation of the production of the active pharmaceutical ingredients. The development, optimization and validation of a production plant have been dominated by an extensive experimental approach. The large amount of experimental work and reluctance for changing existing processes has caused the pharmaceut
Är framtiden hyggesfri? De senaste åren har intresset för skogar som sköts utan kalhyggen ökat, inte minst i takt med att klimatförändringarna gör sig alltmer påminda. När man brukar skogen med hyggesfria metoder tas virket fortfarande tillvara, virke som kan användas till hus, papper eller möbler. Samtidigt står mycket av skogen kvar vilket gör att den kan bjuda in till friluftsliv, bidra till a
CURRICULUM VITAE: ALF HORNBORG [updated December 2011] Education: Ph.D. in Cultural Anthropology, Uppsala University, May 21, 1986 Current position: Professor and Head of Division, Human Ecology Division, Lund University, October 1993 Previous employment: - Assistant Professor at Dept. of Cultural Anthropology, Uppsala University, 1986-1990 - Lecturer in Cultural Anthropology, Uppsala University,
https://www.keg.lu.se/sites/keg.lu.se/files/alf_hornborg.pdf - 2025-10-10
The aim of this dissertation is to study some of the forces behind the transformation of the 20th century industrialised countryside. The emphasis is on changes in everyday life for women and men, and the role of organisations therein. Two main questions are outlined: Which forces were central to the development of the industrial society?, and, how did the relationship between individual and socie
The work examines developments in the novel and the short story of writers who grew up during the New Order era (1966-1998) in the period of reform post 1998. It is assumed and subsequently affirmed that the genres are developing, modern genres in dialogue with the past and present. The work's main use of theory is that of M. M. Bakhtin's ideas of dialogism. The assumption of 'novelization' is fra
The aim of this article is to analyze how nurses respond to and act upon neoliberal transformations of work. The article identifies and explores those transformations considered by my informants, nurses working in public sector hospital wards, as central to changing conditions of work and experiences of work intensifications. It further analyzes nurses’ responses toward these transformations and l
During the 1700's lifestyle and material culture varied a lot between towns and rural areas. The aim for this thesis is to study how this difference between town and countryside emerges and how an identity as a burgher or farmer will manifest itself in the material culture. An important question is if it is possible to find a particular urban lifestyle and if that is the case, what it looks like.
