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This thesis investigates the use of several acceleration schemes to improve the performance of the primal-dual hybrid gradient algorithm for linear programming (PDLP), a state-of-the-art first-order method for linear programming (LP). The three main acceleration schemes investigated are: Polyak heavy ball momentum, Nesterov acceleration, and steering vectors selected in a residual momentum directi
Innovation concentrations are increasingly extending beyond metropolitan cores into urban peripheries through science parks, research infrastructures, advanced manufacturing sites, and innovation districts. Yet their physical presence does not necessarily generate long-term local development capacity. Existing research has explained innovation stability largely through agglomeration, proximity, in
Brädspel blir alltmer populära, vilket gör det ännu viktigare att deras regelböcker går att läsa och förstå. Denna uppsats syftar till att analysera språkbruket i strategiska brädspel i förhållande till klarspråk och forskning om instruerande text, men också att undersöka spelarnas uppfattning om spelens regelböcker. Metoden för undersökningen består av en textanalys av spelen Terraforming Mars, R
This thesis explores how large manufacturing companies in the Benelux region make sense of climate resilience and what they perceive as its key elements. Although ‘corporate climate resilience’ has gained increasing attention in academic and practitioner-oriented literature, the concept is characterised by ambiguity and fragmentation, resulting in inconsistent corporate interpretations and practic
Freshwater ecosystems in the central Andes provide critical ecosystem services (ES), including water purification, baseflow regulation, groundwater recharge, and cultural and recreational benefits. However, these high-mountain systems are increasingly threatened by changing land use, climate variability, and accelerating pressure on water resources. Understanding local willingness to pay for conse
This paper presents a decision-analytic approach for evaluating risk reduction actions for structural systems under climate change. A decision-theoretic formulation is developed to quantify the value of actions, extended to address climate change scenario uncertainties. Scenario occurrence probabilities are derived from probabilistic effective radiative forcing exceedances to link climate model pr
Fulltext är ej tillgänglig i elektronisk form. För lån/kopia av tryckt uppsats kontakta Medicinska fakultetens bibliotek, Lunds universitet
This paper’s main aim is to review and compare sustainability frameworks and models aiming to propose an overarching strategic planning process for selection of sustainable production (SP) indicators within the manufacturing sector, which point toward radical, systematic and goal-oriented changes. The Framework for Strategic Sustainable Development is selected as a conceptual model to guide strate
We propose a formulation of the Network Design Problem (NDP) to support transport planners in dealing with multimodal networks in contexts characterised by different (and sometimes conflicting) interests and limited resources in a transparent way. We expect that the implementation of the method can increase the acceptability of transport schemes. The proposed formulation expands the scope of tradi
A self-tuning algorithm is proposed for the control of the air-fuel ratio in internal combustion engines. Such a controller can overcome problems connected with unknown bias of the engine dynamics, slowly varying engine parameters and excess oxygen sensor characteristics. The simulation study has focused on near-steady-state situations and shows the feasibility of self-tuners in comparison with co
The time and temperature dependent dynamic modulus of asphalt concrete is a key parameter to modern pavement design and to pavement quality. However, accurate measurements of the complex modulus through conventional cyclic testing are expensive regarding both time and costs. Novel test methods based on modal analysis facilitate economic, accurate and faster determination of linear viscoelastic mat
Klimatförändringar orsakade av antropogena faktorer har en ökande effekt på både naturliga och humana system. Klimatförändringar bidrar till en förändring av varaktigheten, frekvensen och intensiteten av extrema väderhändelser (som till exempel stormar, översvämningar och värmeböljor). Några exempel på konsekvenser från klimatförändringar på de humana systemen är förlust av liv, förlust av egendomThe changing climate caused by anthropogenic factors has an increasing effect on natural and human systems. There is therefore an increasing need for society to adapt to the effects of climate change (IPCC, 2012; Rescalvo et al., 2013) This is vital since the effects of climate change are already being noticed in many parts of the world (Rescalvo et al., 2013). However, municipalities in Sweden ge
Analytical solutions to 2D depth-averaged (external mode) and fully 3D (internal mode) periodic flows for numerical model testing are presented in this paper. These solutions take into account the effects of the bottom friction, the horizontal turbulent viscosity, and the vertical turbulent viscosity for the case of 3D flow. The key linkage for the modes is the relationship between the bottom fric
During translation, mRNA molecules are incidentally damaged, leaving the ribosome unable to reach or recognize the stop codon and thus stalled with mRNA and a potentially harmful polypeptide product attached to tRNA in the ribosomal P-site. In bacteria, a process called trans-translation has evolved, where a protein-RNA complex (smpB-tmRNA) mimicks the role of aminoacyl charged tRNA in the ribosom
The article is based on a pilot study of the stories of Swedish patients having had a kidney transplant abroad. Our focus is on how people who have been transplanted abroad talk about and handles the dilemma that may arise due to the transplantation trips.
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In the RUNES project a disaster relief tunnel scenario is being developed in which mobile robots are used to restore the radio network connectivity in a stationary sensor network. A component-based software development approach has been adopted. Two components are described in this paper. A localization component that uses ultrasound and dead reckoning to decide the robot positions and a collision
Background and Purpose-High-dose heparin has been used extensively to treat patients with progressive ischemic stroke, but the scientific support is poor and the current stroke guidelines advise against its use. We studied how heparin treatment for progressive stroke has been discarded in Sweden. Methods-All 78 hospitals in Sweden that admit acute stroke patients participate in Riks-Stroke, the Sw
