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Popular Abstract in Swedish Målet med arbetet var att öka mängden vindkraft, solel och annan distribuerad generering (DG) som kan anslutas till befintliga distributionsnät på ett snabbt och kostnadseffektivt sätt. Att införa aktiv spänningsreglering i nätet, istället för installation av nya ledningar, har identifierats som en lämplig strategi. Då denna princip bygger på att DG-enheternas produktioDistributed generation (DG), i.e. generation connected to the low and medium voltage distribution network (DN), has been increasing a lot during recent years. Thus the traditional assumption of a unidirectional power flow and a voltage decrease along the distribution feeders is no longer valid in all operation conditions. Voltage control in these networks is often limited to the on-load tap change

dis thesis attempts to use qualitative research and sociological analysis to explore how demilitarization, which TEMPhas lasted for decades, may TEMPhas an impact on development in recent years. Mainly based on literature review and data analysis, dis thesis chose Costa Rica as teh background, for revealing national education status - as teh research object - to speculate on how demilitarization T

We have investigated the electronic structure of excitons in InP quantum dots in GaInP. The exciton is theoretically expected to have four states. Two of the states are allowed to optically decay to the ground ( vacuum) state in the dipole approximation. We see these two lines in photoluminescence (PL) experiments and find that the splitting between the lines ( the fine structure splitting) is 150

Coherence in optics and transport is investigated for quantum cascade lasers. While coherence provides oscillations in the gain recovery if the tunnel coupling surpasses the broadening, incoherent hopping transport can fail in the opposite case. (C) 2008 Optical Society of America

In the perpetuated absence of wide-ranged aging-related programs in Indonesia, more than one-quarter of the elderly population rely on the family especially adult children, resulting in the prevalence of three-generation households. This research seeks to explain the underlying motive and the practice of caring for the elderly parent from the vantage point of adult children that act as the main su

A relativistic transient absorption theory is derived, implemented and validated within the dipole approximation based on the time-dependent Dirac equation. In the non-relativistic limit, it is found that the absorption agrees with the well established non-relativistic theory based on the time-dependent Schrödringer equation. Time-dependent simulations have been performed using the Dirac equation

Abstract in UndeterminedHigh penetration of variable generation such as wind power increases the demands on frequency control. The same applies to island operation and in particular if this involves variable generation, which is planned at the Danish island Bornholm. While it is obvious that the frequency control need to be considered, the disturbances caused to this control by the hourly dispatch

In the thesis, three-dimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gate-defined lateral constriction of double barrier structures, and epitaxial growth of self-assembled quantum dots. In addition, the thesis deals with the basic development of large-area double barrier resonant tunneling diodes, as a st

The rotation of a quantum liquid induces vortices to carry angular momentum. When the system is composed of multiple components that are distinguishable from each other, vortex cores in one component may be filled by particles of the other component, and coreless vortices form. Based on evidence from computational methods, here we show that the formation of coreless vortices occurs very similarly

The impact of coherence on the nonlinear optical response and stationary transport is studied in quantum cascade laser structures. Nonequilibrium effects such as the pump-probe signals, the spatiotemporally resolved electron density evolution, and the subband population dynamics (Rabi flopping) as well as the stationary current characteristics are investigated within a microscopic density-matrix a

Postal address: Department of Psychology, Lund University, Box 213, 221 00 Lund, Sweden. Visiting address: Paradisgatan 5 P, 223 50 Lund Department of Psychology Work stress and work satisfaction among teachers The role of psychological need fulfillment PhD project, application deadline 2019-03-01 In Sweden, like in other parts of the world, teachers report unfavorable working conditions and a hig

https://www.psy.lu.se/sites/psy.lu.se/files/es_work_stress_and_work_satisfaction_among_teachers.pdf - 2026-07-17

SOL researchers' work plagiarized SOL researchers' work plagiarized Published 12 March 2024 Last year, three Ukrainian researchers published a scientific article that plagiarized large parts of linguist Sara Farshchi's thesis. Sara Farshchi defended her thesis "Neural and behavioral mechanisms underlying the processing of negated meanings: Words, pictures and sentences" in 2019. The article, which

https://www.sol.lu.se/en/article/sol-forskares-arbete-plagierades/ - 2026-07-16

The Humanities at Lund University are ranked among the best in the world The Humanities at Lund University are ranked among the best in the world Published 3 November 2021 The Humanities at Lund University are ranked 99th in the Times Higher Education (THE) World University Ranking. Lund University is ranked 99th in the category "Arts and Humanities".  Lund University is highly ranked in many inte

https://www.sol.lu.se/en/article/humaniora-vid-lunds-universitet-rankas-som-99-i-vaerlden/ - 2026-07-16

We study the transient dynamics subject to quantum coherence effects of two interacting parallel quantum dots weakly coupled to macroscopic leads. The stationary particle current of this quantum system is sensitive to perturbations much smaller than any other energy scale, specifically compared to the system-lead coupling and the temperature. We show that this is due to the presence of a parity-li

Popular Abstract in Swedish I denna avhandling studeras egenskaper hos tvådimensionella, kvantmekaniska mångpartikelsystem. Studierna utförs med spinndensitetsfunktionalteori (SDFT) med den lokala spinndensitetsapproximationen (LSDA), samt med numerisk exakt diagonalisering. De egenskaper som studeras inkluderar symmetribrytande tillstånd i kvantprickar med få elektroner, gap i inneslutna fåpartik