Search for dissertations about: "pencil beam"

Showing result 11 - 15 of 17 swedish dissertations containing the words pencil beam.

  2. 11. Compact and Efficient Millimetre-Wave Circuits for Wideband Applications

    Author : Lars Ohlsson; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; resonant-tunnelling diode; millimetre-wave spectrum; integrated transmitter; energy-efficiency; compact circuit; dielectric resonator antenna; transistor; wavelet generator; wideband.;

    Abstract : Radio systems, along with the ever increasing processing power provided by computer technology, have altered many aspects of our society over the last century. Various gadgets and integrated electronics are found everywhere nowadays; many of these were science-fiction only a few decades ago. READ MORE

  4. 12. Radiation burden from modern radiation therapy techniques including proton therapy for breast cancer treatment - clinical implications

    Author : Anna M. Flejmer; Alexandru Dasu; Gunnar Adell; Olle Stål; Margaretha Stenmarker; Thomas Björk-Eriksson; Linköpings universitet; []
    Keywords : ;

    Abstract : The purpose of this thesis was to study the clinical implications of modern radiotherapy techniques for breast cancer treatment. This was investigated in several individual studies. READ MORE

  5. 13. High Rate Electron Capture Dissociation Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

    Author : Youri Tsybin; Per Håkansson; Ron M.A. Heeren; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; mass spectrometry; Fourier transform ion cyclotron resonance; peptides and proteins; ion-electron interaction; electron capture dissociation; infrared multiphoton dissociation; liquid chromatography; capillary electrophoresis; Fysik; Physics; Fysik;

    Abstract : Advances in science and technology during the past decade have greatly enhanced the level of the structural investigation of macromolecules – peptides and proteins. Biological mass spectrometry has become one of the most precise and sensitive techniques in peptide and protein analysis. READ MORE

  6. 14. Out-of-field doses from proton therapy and doses from CBCT imaging : Risk of radiation-induced second cancer from modern radiotherapy

    Author : Oscar Ardenfors; Irena Gudowska; Alexandru Dasu; Cathrine Jonsson; Pawel Olko; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Medical Radiation Physics; medicinsk strålningsfysik;

    Abstract : The use of ionizing radiation for treatment of cancer diseases is continuously increasing as patient survival is improving and new treatment techniques are emerging. While this development is beneficial for curing primary tumors, concerns have been raised regarding the unwanted dose contribution to healthy tissues of patients and the associated risk of radiation-induced second cancer (RISC). READ MORE

  7. 15. Submillimeter-Wave Waveguide Frontends by Silicon-on-Insulator Micromachining

    Author : Adrian Gomez-Torrent; Joachim Oberhammer; Umer Shah; Goutam Chattopadhyay; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antenna; orthomode transducer; switch; waveguide; radiofrequency; beamforming network; submillimeter-wave; terahertz; silicon micromachining; deep reactive ion etching; silicon on insulator; Electrical Engineering; Elektro- och systemteknik;

    Abstract : This thesis presents novel radiofrequency (RF) frontend components in the submillimeter-wave (sub-mmW) range implemented by silicon micromachining, or deep reactive ion etching (DRIE). DRIE is rapidly becoming a driving technology for the fabrication of waveguide components and systems when approaching the terahertz (THz) frequency range. READ MORE