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Visar resultat 1 - 5 av 6 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Contouring variability in radiosurgery - dosimetric and radiobiological implications

   Författare :Helena Sandström; Iuliana Toma-Dasu; Mike Partridge; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Medical Radiation Physics; medicinsk strålningsfysik;

   Sammanfattning : The use of Stereotactic Radiation Therapy (SRT) employing one large fraction of radiation, as in stereotactic radiosurgery (SRS), or few fractions of high doses, has continuously increased due to the technical development and the progress in dose delivery complemented by the positive clinical experience. The success of stereotactic radiation therapy depends on many clinical, dosimetric and radiobiological factors. LÄS MER

3. 2. 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

4. 3. Contouring & planning variability in stereotactic radiosurgery : How to assess and address the weakest link in stereotactic radiosurgery?

   Författare :Helena Sandström; Iuliana Toma-Dasu; David Schlesinger; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stereotactic radiosurgery; contouring variability; robust treatment planning; Medical Radiation Physics; medicinsk strålningsfysik;

   Sammanfattning : The use of stereotactic radiosurgery (SRS) employing one or a few fractions of high doses of radiation has continuously increased due to the technical development in dose delivery and morphological and functional imaging. As the target volume in SRS is usually defined without margins, the treatment success critically depends on accurate definition and contouring of the target volume and organs at risk (OARs) which are commonly situated in the proximity of the target making their precise delineation particularly important in order to limit possible normal tissue complications. LÄS MER

5. 4. Centralized Disaster Management Collaboration in Turkey

   Författare :Helena Hermansson; Daniel Nohrstedt; Charles Parker; Annica Sandström; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; collaboration; disaster management; collaborative disaster management; cross-sector collaboration; trust; power balance; legitimacy; integration; local knowledge; local actors; civil society; interdependence; pre-existing relations; political affiliation; natural disaster; disaster response; damage assessment; aid distribution; search and rescue; decentralization; central-local collaboration; political-administrative system; Turkey; Van; Erciş; Statskunskap; Political Science; Statsvetenskap med inriktning mot krishantering och internationell samverkan;

   Sammanfattning : Following unprecedented earthquakes in 1999, highly centralized Turkey initiated reforms that aimed to improve disaster management collaboration and to empower local authorities. In 2011, two earthquakes hit the country anew affecting the city of Van and town of Erciş in Turkey’s southeast. LÄS MER

7. 5. Rationell arkitektur : Företagskontor för massproduktion och masskommunikation

   Författare :Helena Kåberg; Ulf Sandström; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Art history; Addo; Asea; Bulten; Corporate Image; House Style; New Monumentality; Scientific Management; Swedish Modern; Ladislav Sutnar; Oscar Nitzchke; Sven Ahlbom; von Kantzow; Konstvetenskap; Art; Konstvetenskap; History Of Art; konstvetenskap;

   Sammanfattning : Modern architecture, which can be perceived as representational, metaphoric or symbolic, has often been excluded in Swedish architectural debate and writing. Ideological perspectives dominate, and the focus has been on housing and infrastructure. Frequently, architecture of the mid twentieth century has been characterized as neutral. LÄS MER