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n order to make attribute grammars useful for complicated analysis tasks, a number of extensions to the original Knuth formalism have been suggested. One such extension is the collection attribute mechanism, which allows the value of an attribute to be defined as a combination of contributions from distant nodes in the abstract syntax tree. Another extension that has proven useful is circular attr
Different methods for treatment of leachate from a municipal solid waste (MSW) landfill were tested in a pilot plant. Raw leachate was pre-treated with aeration and sedimentation, followed by several parallel individual steps such as bioremediation, chemical oxidation, ozonation, and geo-bed filters. The efficiency of different treatment steps was evaluated according to one previously developed pr
This article is based on a keynote presentation at the 12th Nordic Congress in General Practice in Trondheim, Norway in September 2002. The aim was to demonstrate the strengths and limitations of evidence-based medicine (EBM) in a primary healthcare setting. The presentation comprised two separate lectures discussing an authentic case history from everyday practice that had been presented to the a
Controlled dehydration of macromolecular crystals can lead to significant improvements in crystalline order, which often manifests itself in higher diffraction quality. Devices that can accurately control the humidity surrounding crystals on a beamline have led to this technique being increasingly adopted as experiments become easier and more reproducible. However, these experiments are often carr
We present high spectral resolution (similar to 3 km s(-1)) observations of the nu(2) ro-vibrational band of H2O in the 6.086-6.135 mu m range toward the massive protostar AFGL 2591 using the Echelon-Cross-Echelle Spectrograph (EXES) on the Stratospheric Observatory for Infrared Astronomy (SOFIA). Ten absorption features are detected in total, with seven caused by transitions in the nu(2) band of
We study dynamics in a network of interacting agents updating their binary states according to a time-varying threshold rule. Specifically, agents revise their state asynchronously by comparing the weighted average of the current states of their neighbors in the interaction network with possibly heterogeneous time-varying threshold values. Such thresholds are determined by an exogenous signal repr
The development of a decarbonised food industry will depend on a sustainable agricultural system where embodied food product greenhouse gas emissions (GHG) can be associated with agricultural production. The results presented demonstrate how physically mapping agri-production provides regional carbon footprints so practice that reduces GHG emissions become strategic rather than random. Different a
Fourteen guests from all over Europe and editors of Chemistry Europe journals met for two days to discuss trends and challenges in publishing and to get to know each other during networking breaks and a social evening. The third Chemistry Europe Early Career Researchers Meeting was held on invitation by the Chemistry Europe societies at the Wiley-VCH offices in Weinheim, Germany. It was a great su
Upon preschool enrollment, the child-teacher relationship becomes important for the child’s continued development. We suggest that parents may be essential in supporting the establishment of such relationships from the first weeks of the child’s preschool enrollment, the so-called “introduction process”. Recent data indicates that Nordic preschools organize this aspect of preschool introduction di
In this paper we give a distributed solution to the problem of making a team of non-holonomic robots achieve the same heading (attitude consensus problem) using vision sensors with limited field of view. The use of cameras with constrained field of view limits the information the robots perceive compared to other omnidirectional sensors. This makes the consensus problem more complicated, because t
Denna reflekterande del av min konstnärliga kandidatexamen började med en nyfikenhet av mina rörelser vid pianot. Jag ville reflektera över hur jag själv uppfattar mina egna rörelser, och varför jag rör mig hur jag gör, och även vilket syfte dessa rörelser har utöver de tekniska krav som musiken ställer på min kropp. Jag valde tre olika videos av framträdande, en live-konsert, en live-streamad konThis reflective part of my Bachelor’s degree started with an increased curiosity into how I move my body whilst at the piano. I wanted to reflect on how I perceive my own movements, on why I move like I do, and what purpose these movements may have beyond the way I need to move to handle any technical difficulties. I chose three different videos of performances, one live concert, one live streamed
This thesis covers the optimal control of stochastic systems with coarsely quantised measurements. A particle filter approach is used both for the estimation and control problem. Three main families of particle filters are examined for state estimation, standard SIR filters, SIR filters with generalised sampling and auxiliary filters. A couple of different proposal distributions and weight functio
The purpose of this thesis is to study complex analysis, the Bergman space and Korenblum's conjecture. This is done in three parts. In the first part the proofs that the conjecture is true are studied, giving lower bounds of Korenblum's constant. The first proof is explained in detail, to make it as accessible as possible to more people. The main differences for a couple of later proofs th
The shape of a Belleville washer ring is optimized with the purpose of tailoring its mechanical response. The optimization is carried out using structural shape optimization with regards to large deformations. In order to accurately model boundaries, B-splines are utilized as they are closely related to the de facto-standard used in most of todays CAD systems. Furthermore, the structural analysis
Given the importance of copper prices to investors, governments, and policymakers, this paper investigates short-term price predictability using VAR and XGBoost models. All models are trained with historical data from November 2021 to December 2022 and using MSE, RMSE and MAE for evaluating the model performance. The results show that the XGBoost model outperforms VAR models, implying that machine
This paper examines the performance of traditional statistical models (SARIMA & SARIMAX) and modern machine learning models (XGBoost) for forecasting Swedish public sector food prices organized by a hierarchical index structure. The depth of the analysis is made possible by collaborating with Matilda Foodtech, who gave access to anonymized food procurement data from Swedish public organization
Beginning with the question of whether, and how, gender equality can be measured, this thesis is written with the ambition to evaluate one aspect of the Swedish government’s equality goal, equality in power and influence, with the help of an index. It departs from a discussion within the field of gender studies where gender equality is found to be an “empty” word that can be used for a variety of
This thesis describes the process to build an entity recognizer and disambiguator, named HERD. The goal of the system is to find mentions of entities in text and link those mentions to a unique identifier. This system is designed to be multilingual and has versions in English, French and Swedish. I use Wikipedia as a knowledge source of both names and concepts, and Wikidata, a language agnostic,
Student achievement in reading is a complex phenomenon that depends on many factors, but perhaps it can be predicted with a smaller model. Does attending kindergarten as well as parental education affect reading achievement at the end of the fourth grade? Can reading achievement be predicted by the combination of attending kindergarten and parental education? Results from the IEA PIRLS (Progress i
