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Wet chemical and ultra-high vacuum treatments of semiconductor surfaces to decrease electrical and optical losses in devices
(Turun yliopisto, 2025-08-29)
ABSTRACT
Semiconductors play an important role in our today’s lives. Our societies could not operate normally without semiconductors. They are used in devices that form new infrastructures in our societies. Decades ago, ...
X-ray bursts as a tool to constrain the equation of state of the ultra-dense matter inside neutron stars
(Turun yliopisto, 2017-12-15)
Neutron stars are one of the most dense objects in the Universe. However, the exact description of the equation of state (EoS) of the cold ultra-dense matter inside them is still a mystery. In this thesis, we measure the ...
Numerical Studies of Dark Energy Models and Observations
(Turun yliopistoAnnales Universitatis Turkuensis A I 511, 2015-04-18)
The cosmological standard view is based on the assumptions of homogeneity, isotropy and general relativistic gravitational interaction. These alone are not sufficient for describing the current cosmological observations ...
On Methods for Constraining F (R) Theories of Gravity
(Turun yliopistoAnnales Universitatis Turkuensis A I 556, 2017-04-21)
Einstein's theory of general relativity is without doubt one of greatest achievements in the history of Mankind. Even so, there are some ways, in which it leaves room for improvement. The last one hundred ...
Numerics of Spacecraft Dynamics
(Turun yliopisto, 2011-02-26)
Whenever a spacecraft is launched it is essential that the algorithms in the on-board software systems and at ground control are efficient and reliable over extended periods of time. Geometric numerical integrators, and ...
Research and development of III-V semiconductor surfaces for improved device interfaces
(Turun yliopistoAnnales Universitatis Turkuensis A I 473, 2013-10-19)
This thesis is devoted to understanding and improving technologically important
III-V compound semiconductor (e.g. GaAs, InAs, and InSb) surfaces and
interfaces for devices. The surfaces and interfaces of crystalline ...
Magnetic Resonance Experiments with Atomic Hydrogen
(Turun yliopistoAnnales Universitatis Turkuensis A I 412, 2010-10-30)
In this thesis three experiments with atomic hydrogen (H) at low temperatures T<1 K are presented. Experiments were carried out with two- (2D) and three-dimensional (3D) H gas, and with H atoms trapped in solid H2 matrix. ...
Analytical techniques for X-ray polarization studies of rapidly rotating neutron stars and black holes
(Turun yliopisto, 2025-05-23)
Compact stellar remnants such as neutron stars and black holes attract not only mate¬rial from their surroundings but also the close attention of astronomers. The latter is because these objects constitute unattainable ...
Determination of absorbed dose by radiophotoluminescence dosimetry and Monte Carlo simulations
(Turun yliopisto, 2023-04-21)
Radiation therapy (RT) utilizes the harmfulness of ionizing radiation for good, with the goal of destroying cancer cells without damaging too much healthy tissue. Dosimetry is always needed to achieve this goal. Dosimetry ...
Galaxy evolution through the lens of active galactic nuclei, their host galaxies, and environments
(Turun yliopisto, 2024-06-11)
The body of research relayed in this dissertation pertains to investigating the immediate environments of Type I quasars for clues to the formation and evolution of galaxies through observations. The neighboring galaxies ...