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The injection flow rates of two liquid phases play a decisive role in the slug generation of the liquid-liquid slug flow. However, most injection flow rates so far have been constant. In order to investigate the effects of dynamic injection flow rates on the slug generation, including the slug size, separation distance and slug generation cycle time, a transient numerical model of a cross-junction
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
Multiple exciton generation (MEG) is a process in which more than one exciton is generated upon the absorption of a high energy photon, typically higher than two times the band gap, in semiconductor nanocrystals. It can be observed experimentally using time resolved spectroscopy such as the transient absorption measurements. Quantification of the MEG yield is usually done by assuming that the bi-e
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Thus the traditional assumption of a unidirectional power flow and a voltage decrease along the distribution feeders is no longer valid in all operation conditions.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
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
25 november 2025 19:00 till 26 november 2025 10:00 | Seminarium CONCERT: Tuesday, 25 November 2025, at 19:00Programme:Salvatore Sciarrino (*1947): L’addio a Trachis (trascr. for guitar by Francesco Palmieri) [1980/2021]Luciano Berio (1925–2003): Sequenza XI (for guitar) [1988]Marco Momi (*1978): Sans dire (for guitar & electronics) [2021]Marco Momi: Quattro nudi (for e-guitar & electronics) [2014/
https://www.lu.se/evenemang/50-phd-seminar-concert-francesco-palmieri - 2026-07-16
Mexico has experienced the dramatic escalation of crime and violence in an organized form since the 1990s, and have also witnessed the highest number of homicides in the last ten years. It has adversely affected the national security, economic growth and social development with an especially detrimental effect on youth in Mexico. This study examines the direct and indirect impacts of drug trade-re
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
Tillsammans med industrin utvecklar vi nya idéer inom material, tillverkning och materialåtervinning. Målet är att hitta lösningar som både ser till miljön och stärker företagens konkurrenskraft. Industrin förbrukar cirka en tredjedel av Sveriges energi och mycket av miljöbelastningen av vår konsumtion kommer från material som finns i bruksprodukter som exempelvis redskap, hushållsmaskiner och for
https://www.lu.se/forskning/fokusomraden/strategiska-forskningsomraden/hallbar-produktion - 2026-07-15
