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Photon Dose Calculations in a Fluence-Based Treatment Planning System: Data Processing, Implementation and Validation

Popular Abstract in Swedish Framgångsrik strålbehandling av cancerpatienter kräver att man kan bestämma den absorberade dosen i patienten med stor noggrannhet. Bara några enstaka procents avvikelse i absorberad dos kan ha betydelse för det kliniska resultatet avseende både tumörutläkning och normalvävnadsreaktioner. För att beräkna den absorberade dosen i patienten används sofistikerade datorprogThe accuracy of dose calculations for various aspects of a treatment planning system (TPS) using an energy fluence beam modelling has been evaluated. The investigated TPS uses a beam model, which separates the energy fluence into a number of sources in the treatment head. The energy fluence components are transported towards the patient and, together with the scatter generated in the patient, yiel

Food for Naught : The politics of food in agricultural modernization for African smallholder food security

Why is there hunger in sub-Saharan Africa? What forces drive the global food system? What is the global food system? To approach these questions, this study investigates power and politics in food, in its production and in its organization. Proceeding from a critical realist approach, focus of this study is on the challenge of African smallholder food insecurity and how it is presented as part of

Solidarity with the powerful? Fieldwork and Ethnography with Elites

Anthropologists have a long history talking about what we should do when we research less powerful or subordinate groups. We build rapport, we give them voice, we describe their world to others, we show their problems and their solutions. We have a kind of solidarity with them. But more of us are now researching groups with autonomous resources and power. I myself have been with NGO elites, planne

Review of microstructure modeling in solid oxide fuel cell electrodes

Solid Oxide Fuel Cells (SOFCs) are widely studied for their advantages specially at high temperatures. The microscopic chemical reactions that occur in the cells have a strong influence on the cell performance although not much research has been done in this field yet. In order to do so, a numerical model of the microstructure of the electrodes, where the reactions take place, is needed. Different