Sökning: "time trends"

Visar resultat 21 - 25 av 654 avhandlingar innehållade orden time trends.

  1. 21. Long-term changes of mercury, lead and persistent organic pollutants in arctic environments

    Författare :Carola Lindeberg; Ingemar Renberg; Mats Tysklind; Ove Emteryd; Edvard Karlsson; Per Jonsson; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lake sediment; time trends; chlordane; hexachlorobenzene; mercury; lead; soil; climate changes; Arctic; Greenland; Sweden; Swedish mountains; PCB; PBDE; pesticides; Earth sciences; Geovetenskap;

    Sammanfattning : The Arctic represents a huge area with poor infrastructure contributing to limited possibilities to establish monitoring and research programs. From the investigations that have been performed we know that the arctic environment is affected by anthropogenic emissions from lower latitudes, but knowledge about underlying transport processes, the arctic pollution extent and the rates of changes are limited. LÄS MER

  3. 22. Mortality in Oxygen-Dependent Chronic Obstructive Pulmonary Disease and Possibilities for Pharmacological Interventions

    Författare :Magnus Ekström; allergologi och palliativ medicin Lungmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; COPD; mortality; survival; comorbidity; cardiovascular disease; cardiovascular drugs; angiotensin-converting enzyme inhibitor; angiotensin receptor blocker; beta blocker; statin; aspirin; antiplatelet drug; gender; sex; oxygen-dependent; LTOT; trends; excess mortality; SMR; hypoxemia; hypoxia; hypoxaemic;

    Sammanfattning : Background Chronic obstructive pulmonary disease (COPD) is a major and rising cause of mortality worldwide, especially in women. Patients with chronic hypoxia owing to COPD are treated with long-term oxygen therapy (LTOT) but have high morbidity and mortality. LÄS MER

  4. 23. Explaining Trends in Car Use

    Författare :Anne Bastian; Maria Börjesson; Jonas Eliasson; Oded Cats; Patricia Mokhtarian; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; car use; peak car; VMT; VKT; Transportvetenskap; Transport Science;

    Sammanfattning : Many western countries have seen a plateau and subsequent decline in car travel during the early 21st century. What has generated particular interest and debate is the claim that the development cannot only be explained by changes in traditional explanatory factors such as GDP, fuel prices and land-use. LÄS MER

  5. 24. Economic perspectives on the obesity epidemic

    Författare :Åsa Ljungvall; Nationalekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Obesity; body-mass index; BMI; waist circumference; inequality; socioeconomic inequalities; concentration index; socioeconomic disparities; time trends; economic freedom; misreporting; misclassification;

    Sammanfattning : This thesis takes its starting point in the large spread and rise in obesity prevalence that have been observed around the world, making obesity an increasing public health concern. The thesis consists of an introductory chapter, which justifies the study of obesity from economic perspectives and puts the subsequent studies in context, and four studies that address obesity from different economic perspectives. LÄS MER

  7. 25. Epidemiology and etiology of childhood fractures in southern Sweden

    Författare :Vasileios Lempesis; Ortopedi - klinisk och molekylär osteoporosforskning; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; CHILDREN; Boys; Etiology; Girls; Epidemiology; fractures; trends; distal forearm; hand; phalanges; metacarpals;

    Sammanfattning : Background: As much as 40–50% of children are expected to sustain fractures during growth. A childhood fracture is alsoassociated with high risk of fractures in adult life. Previous research has shown that fracture incidence has not been stable andsome studies suggest that this has also continued during recent decades. LÄS MER