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In this paper, we develop a computational method for model reduction of polynomial dynamical systems. This is achieved using sum of squares relaxations on certain Lyapunov inequalities, which are the nonlinear counterparts of the Lyapunov controllability and observability linear matrix inequalities for linear systems. In our model reduction procedure, we use notions of balanced realization and bal
Background: Delayed cerebral ischemia (DCI), a complication of subarachnoid hemorrhage (SAH), is linked to cerebral vasospasm and associated with poor long-term outcome. We implemented a structured cerebral microdialysis (CMD) based protocol using the lactate/pyruvate ratio (LPR) as an indicator of the cerebral energy metabolic status in the neurocritical care decision making, using an LPR ≥ 30 as
Over the last few years, we have witnessed a surge in protest movements around the world. As planet Earth shows its vulnerability and a global pandemic has fundamentally recalibrated the textures of our individual and collective lives, a shared concern for survival triggers individuals and groups to contest the status quo and to call for alternative solutions to the pressing issues of our time. Th
Denna uppsats beskriver den svenska narkotikastraffrätten med särskilt fokus på det egna bruket i en historisk kontext genom att sätta lagstiftningsarbetet i den politiska och kulturella verklighet som var närvarande vid lagstiftningen. Beskrivningen sker främst kronologiskt med fokus på olika politiska viljor som var med och formade narkotikalagstiftningen i Sverige. Tidsperioden sträcker sig fräThis thesis describes the Swedish penal law on narcotics in a historical context with certain focus on personal use of drugs. This thesis is going to examine this by putting legislative work in the political and cultural reality that was present around a legislative amendment. The thesis is going to describe the different theories that are the reasons behind how the law is written today and how di
One implication of the Efficient Market Hypothesis (EMH) is that it is not possible to consistently and over time create abnormal returns without taking on additional risk. However, the hypothesis has become one of the most debated theories in financial economics. Numerous studies suggest that seasonal patterns exist in stock returns, so-called calendar effects, which violates the assumption of st
During the summer of 2018, Sweden’s crisis management experienced a massive challenge due to widespread forest fires. After the fires the Swedish public authority, Myndigheten för samhällsskydd och beredskap (MSB), got an expanded mandate and therefore ability to operate the Swedish crisis management system. This essay aims to find the answer to why MSB got this mandate and what was the reason beh
