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https://www.staff.lu.se/calendar/kent-olofsson-vande-gorne-vaggione-ferreyra-intonal-2026 - 2026-05-30

Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (2014 July-2017 July). This is the third data release for SDSS-IV, and the 15th from SDSS (Data Release Fifteen; DR15). New data come from MaNGA - we release 4824 data cubes, as well as the first stellar spec

Centre for Mathemat ica l Sc iences Div is ion of Mathemat ics and Numerica l Analys is Course Analysis for MATA21 Analysis in One Variable, Spring 2023 Course Information Lecturer: Jan-Fredrik Olsen Teaching assistants: Joakim Cronvall, Alex Bergman Number of students: 82 newly registered and 20 re-registered. 30 students answered the course evaluation, of which 23 are enrolled on BSc Physics and

https://www.maths.lu.se/fileadmin/maths/Matematik_NF/Kursutvaerderingar/VT2023/MATA21VT23.pdf - 2026-05-28

This thesis is about BIM (Building Information Model/Modelling) and answer from The Railroad Industries point of view the questions asked in the report. There are different perceptions in the industry about what BIM means and what it is. This thesis will try to clarify the meaning of the concept BIM. Further on the thesis examines to which extent and how BIM is used in the railroad industry where

The goal of this investigation is to study the performance of two different aspects of neural network ensembles: one ensemble contains over-trained networks and the other very many members. The over-training of the networks within the first ensemble is achieved with a larger number of hidden neurons than the approximation task in question would require. The result of the investigation is that over

Hjärttransplantationer syftar till att rädda liv men kan även vara riskabla ingrepp. Det är mycket som kan gå fel. Det transplanterade hjärtat lider stor risk att avstötas i mottagarens kropp, och en mer detaljerad kunskap om faktorerna som påverkar avstötning har således möjligheten att rädda liv. Avstötning orsakas av att mottagarens immunförsvar känner av HLA-molekylerna, där HLA står för HumThe beneficial effects of HLA matching at the HLA-A, -B and -DR loci on recipient short- and long-term survival in heart transplants have been established in a number of studies. The objective of the present study was to evaluate the importance of individual HLA alleles at the HLA-A, -B and -DR loci as risk factors for recipient death within one year after transplant by using artificial neural net

The phytohormone auxin plays an essential role in many aspects of plant growth and development. Its patterning, intercellular transport, and means of signaling have been extensively studied both in experiments and computational models. Here, we present a review of models of auxin-regulated development in different plant tissues. This includes models of organ initiation in the shoot apical meristem

Estimation of the generalization performance for classification within the medical applications domain is always an important task. In this study we focus on artificial neural network ensembles as the machine learning technique. We present a numerical comparison between five common resampling techniques: k-fold cross validation (CV), holdout, using three cutoffs, and bootstrap using five different

We employ a mesoscopic model for studying aggregation processes of proteinlike hydrophobic-polar heteropolymers. By means of multicanonical Monte Carlo computer simulations, we find strong indications that peptide aggregation is a phase separation process, in which the microcanonical entropy exhibits a convex intruder due to non-negligible surface effects of the small systems. We analyze thermodyn

An atomic protein model with a minimalistic potential is developed and then tested on an α-helix and a β-hairpin, using exactly the same parameters for both peptides. We find that melting curves for these sequences to a good approximation can be described by a simple two-state model, with parameters that are in reasonable quantitative agreement with experimental data. Despite the apparent two-stat

Recent advances in live imaging and genetics of mammalian development which integrate observations of biochemical activity, cell-cell signaling and mechanical interactions between cells pave the way for predictive mathematical multi-scale modeling. In early mammalian embryo development, two of the most critical events which lead to tissue patterning involve changes in gene expression as well as me

Recent experiments have identified peptides that adhere to GaAs and Si surfaces. Here, we use all-atom Monte Carlo simulations with implicit solvent to investigate the behavior in aqueous solution of four such peptides, all with 12 residues. At room temperature, we find that all four peptides are largely unstructured, which is consistent with experimental data. At the same time, we find that one o

We discuss partially quenched chiral perturbation theory (PQ chi PT) and possible fitting strategies to lattice QCD data at next-to-next-to-leading order (NNLO) in the mesonic sector. We also present a complete calculation of the masses of the charged pseudoscalar mesons, in the supersymmetric formulation of PQ chi PT. Explicit analytical results are given for up to three nondegenerate sea-quark f

In multicellular organisms cells grow, divide and adopt different fates, resulting in tissues and organs with specific functions. In recent years, a number of studies have brought quantitative knowledge about how these processes are orchestrated, shedding new light on cells as active and central players in morphogenesis. We explore recent advances in understanding plant morphogenesis from a quanti

We study the folding thermodynamics of a beta-hairpin and two three-stranded beta-sheet peptides using a simplified sequence-based all-atom model, in which folding is driven mainly by backbone hydrogen bonding and effective hydrophobic attraction. The native populations obtained for these three sequences are in good. agreement with experimental data. We also show that the apparent native populatio

When diagnosing acute coronary syndrome, time is of the essence and electrocardiography the most effective method to obtain data about the patients condition. Artificial neural networks can here be used to assist medical doctors. In this text the wavelet transform is introduced as a signal processing method for piping ECG-curves to ANN’s. The performance of this setup (ANN performance is measured b

Nukleosynthes i ackretionsskrivor kring svarta hål. Hur bildas atomerna som bygger upp oss människor - till exempel atomer av kol, syre eller kalcium? Den idag gâllande teorin är att lättare atomer såsom väte, helium och litium skapades vid "Big Bang", medan en supernova från en döende stjärna producerade och frigjorde bland annat kol, syre, kalcium och järn. Det som stjärnnor och Big BNucleosynthesis is the mechanism which produces new elements in nuclear reactions. Nuclear reaction rates are highly temperature dependant, and nuclear reactions take place in very hot environments. Current theories predict that the light elements such as hydrogen and helium were produced during the Big Bang. On the other hand, the core of stars produce heavier elements through nuclear fusion. The

Problem Description Both academic researches and consulting firms claim that Internet of Things will come to change the society we live in, as well as create entirely new business opportunities for companies. However, there is little research that analyzes the actual benefits with Internet of Things, how companies should act in order to find these benefits, and in what way their business models m

The overlap between the spectroscopic Galactic Archaeology with HERMES (GALAH) survey and Gaia provides a high-dimensional chemodynamical space of unprecedented size. We present a first analysis of a subset of this overlap, of 7066 dwarf, turn-off, and sub-giant stars. These stars have spectra from the GALAH survey and high parallax precision from the Gaia DR1 Tycho-Gaia Astrometric Solution. We