Sökning: "digital manifold"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden digital manifold.

1. 1. Digital Geometry and Khalimsky Spaces

   Författare :Erik Melin; Christer Kiselman; Gunilla Borgefors; Mikael Passare; Jean Serra; Uppsala universitet; []
   Nyckelord :Applied mathematics; Khalimsky topology; digital geometry; digital topology; Alexandrov space; digital surface; digital curve; digital manifold; continuous extension; smallest-neighborhood space; image processing; Tillämpad matematik;

   Sammanfattning : Digital geometry is the geometry of digital images. Compared to Euclid’s geometry, which has been studied for more than two thousand years, this field is very young.Efim Khalimsky’s topology on the integers, invented in the 1970s, is a digital counterpart of the Euclidean topology on the real line. LÄS MER

3. 2. Flash Diffractive Imaging in Three Dimensions

   Författare :Tomas Ekeberg; Janos Hajdu; Keith Nugent; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray; diffraction; mimivirus; three dimensional; phase retrieval; EMC; manifold embedding; CXI; FEL; free-electron laser; single particle; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

   Sammanfattning : During the last years we have seen the birth of free-electron lasers, a new type of light source ten billion times brighter than syncrotrons and able to produce pulses only a few femtoseconds long. One of the main motivations for building these multi-million dollar machines was the prospect of imaging biological samples such as proteins and viruses in 3D without the need for crystallization or staining. LÄS MER

4. 3. On Modelling Nonlinear Variation in Discrete Appearances of Objects

   Författare :Felix Wehrmann; Ewert Bengtsson; Lennart Thurfjell; Fredrik Bergholm; Timothy Cootes; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bildanalys; image analysis; shape description; nonlinear modelling; manifold reconstruction; auto-associative neural network; Bildanalys; Image analysis; Bildanalys;

   Sammanfattning : Mathematical models of classes of objects can significantly contribute to the analysis of digital images. A major problem in modelling is to establish suitable descriptions that cover not only a single object but also the variation that is usually present within a class of objects. LÄS MER

5. 4. The Invisible Landscapes : The Construction of New Subjectivities in the Era of the Mobile Telephone

   Författare :Miya Yoshida; Konsthögskolan i Malmö; []
   Nyckelord :HUMANIORA; HUMANITIES; Subjectivities; Art History; Digital Network; Mobile Telecommunication; Geopolitics; Konstvetenskap;

   Sammanfattning : The interventions of portable digital devices such as mobile telephones, mp3 players, PDAs and many others, have contributed to the formation of contemporary notions of space. The impact of these devices' mobility (informing the users' mobility) could even be paralleled to the shift from the effects of still photography to those of film in the 19th century. LÄS MER

7. 5. Genetical and Clinical Studies in Wilson's Disease

   Författare :Erik Waldenström; Kerstin Westermark; Ulf Landegren; Ann-Christine Syvänen; Peter Ferenci; Uppsala universitet; []
   Nyckelord :Internal medicine; copper radioisotopes; DNA sequence analyses; genotype; hepatolenticular degeneration; neoplasms; phenotype; positron-emission tomography; psychopathology; Invärtesmedicin;

   Sammanfattning : Wilson’s disease is a rare inborn error of metabolism caused by a defect in ATP7B, a protein necessary for proper copper excretion into bile. It is characterised by copper accumulation with hepatic and central nervous system dysfunction. LÄS MER