Sökning: "1-3 years"

Visar resultat 31 - 35 av 277 avhandlingar innehållade orden 1-3 years.

1. 31. Haystacks and Needles : Measuring the number of proton collisions in ATLAS and probing them for the production of new exotic particles

   Författare :Giulia Ripellino; Jonas Strandberg; Gabriella Pasztor; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atomic; Subatomic and Astrophysics; Atomär fysik; subatomär fysik och astrofysik;

   Sammanfattning : This thesis describes my work on the ATLAS luminosity measurement and on two searches for physics beyond the Standard Model, performed using √s = 13 TeV proton-proton (pp) collision data recorded by the ATLAS detector at CERN during Run 2 of the LHC in the years 2015-2018ATLAS employs several detectors and methods to measure the relative luminosity and the absolute scale is determined using van der Meer scans during dedicated low-luminosity running periods in each year. The thesis presents the details of the track-counting method which is used to extrapolate the calibration to the high-luminosity physics data-taking regime. LÄS MER

3. 32. Indoor environment and recurrent wheezing in young children

   Författare :Gunnel Emenius; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Child; asthma; allergy; wheezing; air pollution; NO2; indoor air quality; building construction; ventilation system; indoor humidity; house dust mites; damp buildings; moisture; moulds; prospective studies; child;

   Sammanfattning : Recurrent wheezing is one of the most common causes of morbidity and hospitalisation among infants and young children in many westernised countries. Respiratory infections and exposure to tobacco smoke have been identified as important risk factors. The indoor environment is also clearly of importance since we spend most of our time indoors. LÄS MER

4. 33. Norway spruce heartwood : properties related to outdoor use

   Författare :Karin Sandberg; Lars-Olof Nilsson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träteknik; Wood Technology;

   Sammanfattning : Degradation of wood is a complex problem dependent on many parameters, but especially the presence of excessive amounts of water causes many problems.The objective of this work was to study the influence of various parameters on water absorption and desorption in Norway spruce (Picea abies (L.) Karst). LÄS MER

5. 34. Homocysteine and vascular morbidity and dementia in women. A prospective population study

   Författare :Dimitri Zylberstein; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Women; population study; dementia; Homocysteine; MTHFR; myocardial infarctions; lacunar infarcts; epidemiology;

   Sammanfattning : Homocysteine and cardiovascular morbidity and dementia in women - A prospective population study Dimitri Edin Zylberstein Institute of Medicine, The Sahlgrenska Academy, Department of Public Health and Community Medicine, Section of Primary Health Care, University of Gothenburg Abstract Purpose. The purpose of this thesis was to study cardiovascular morbidity and dementia in relation to homocysteine levels in women in a longitudinal, prospective population study over several decades. LÄS MER

7. 35. Cariological and Salivary Studies in 70-Year-Old Cohorts

   Författare :Cecilia Johanson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; cohort differences; cross-sectional; dental health; elderly; epidemiology; lifestyle; longitudinal; medication; population study; saliva; socioeconomic;

   Sammanfattning : Life expectancy after 65 years of age has increased markedly during the last decades, and is still increasing. The purpose of this thesis was to describe differences in dental health between 70- year-olds born in different years, to describe caries prevalence, incidence over a 6-year period in one cohort, and try to find risk factors for dental caries. LÄS MER