Sökning: "Helena Back"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden Helena Back.

  1. 1. Low virulent respiratory viruses in standardbred trotters : relationship to health and athletic performance

    Författare :Helena Back; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Respiratory viral infections are known to affect equine health worldwide and are commonly associated with clinical signs such as fever, cough, and nasal discharge. While clinical respiratory signs will prevent horses from training and racing, it is also known that horses can be infected by viruses and yet not exhibit any clinical signs (i.e. LÄS MER

  3. 2. Big survivors with small flowers : Fossil history and evolution of Laurales and Chloranthaceae

    Författare :Helena Eklund; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; systematisk botanik; Systematic Botany;

    Sammanfattning : This thesis provides palaeobotanical evidence on Cretaceous Laurales and Chloranthaceae, and discusses and evaluates the material in a phylogenetic framework. Chloranthaceae extend back to the Barremian or Aptian and Laurales to the Albian (both Early Cretaceous). LÄS MER

  4. 3. Internet services and security

    Författare :Helena Sandström; Luleå tekniska universitet; []
    Nyckelord :;

    Sammanfattning : This thesis presents my research on IP Traceback and on QoS admission control. It also includes a brief discussion about the security problems we are facing today and how adding new network services affects the original Internet design. Internet security is an ever rising problem. LÄS MER

  5. 4. Passenger assessments of quality in local public transport- measurement, variability and planning implications

    Författare :Helena Sjöstrand; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; passenger; public transport; quality; survey; Stated Preference; assessment; assignment; planning; Transportteknik; Transport technology; Road transport technology; Vägtransportteknik;

    Sammanfattning : The aim of this work was to get a more detailed basis for planning of local public transport. With more knowledge of how segments of travellers assess different parts of a journey, bus routes can be planned to fit either all passengers or selected groups better. LÄS MER

  7. 5. Palladium-catalyzed aromatic coupling and allylic substitution

    Författare :Helena Hagelin; KTH; []
    Nyckelord :;

    Sammanfattning : Different types of palladium(II)-catalyzed aromatic couplingreactions have been investigated.The cyclization of diphenyl ether was found to be moresensitive to reaction conditions than was the cyclization ofthe diphenylamine derivatives. LÄS MER