Gurret: Decentralized data management using subscription-based file attribute propagation

Research institutions and funding agencies are increasingly adopting open-data science, where data is freely available or available under some data sharing policy. In addition to making publication efforts easier, open data science also promotes collaborative work using data from various sources around the world. While the research datasets are often static and immutable, the metadata of a file can be ever-changing. For researchers who frequently work with metadata, accessing the latest version may be essential. However, this is not trivial in a distributed environment where multiple people access the same file. We hypothesize that the publisher subscriber model is a useful abstraction to achieve this system. To this, we present Gurret: a distributed system for open science that uses a publisher-subscriber based substrate to propagate metadata updates to client machines. Gurret offers a transparent system infrastructure that lets users subscribe to metadata, configure update frequencies, and define custom metadata to create data policies. Additionally, Gurret tracks information flow inside a filesystem container to prevent data leakage and policy violations. Our evaluations show that Gurret has minimal overhead for small to medium-sized files and that Gurret can support hundreds of custom metadata without losing transparency

Seismic analysis of a multi-story timber-concrete building with focus on reusability

The production of structural elements used in the construction industry is responsible for large parts of the global carbon dioxide production. Facilitating future reuse and implementation of reused elements should be an essential part of designing buildings. Reusing hollow core slabs is barely introduced in niche projects, but a recently published standard describes a standardized process to ensure the quality of reusable elements. By combining these with environmentally friendly materials like timber, the GHG emissions can be reduced. This thesis investigates the dynamic behavior of an 8-story reference building designed with moment-resisting timber frames, CLT wall panels, and hollow core slabs through numerical modal analysis. In addition to pinned and rigid beam-to-column connections are four different connections from previous researches implemented in the model using rotational springs. Results from the modal analysis show that when timber connections with low rotational stiffness are implemented, the building has a torsional mode as the fundamental mode. Two torsional modes are present when considering the number of modes necessary to reach 90% mass participation ratio in each main direction. As the rotational stiffnesses of the connections are increased, the first torsional mode is shifted to a higher frequency mode. Modal response spectrum analysis according to the Eurocode 8 is performed for all connection-cases using Complete Quadratic Combination. For a building located in a low-seismicity area, interstory drift and member capacity utilization are within limits for all connection-cases. The reuse potential of the components in each timber connection is discussed, evaluating the complexity of the connection, and the necessary man hours to assemble and disassemble the connection. The traditional bolted connection is found to offer the highest flexibility and reuse potential.Produksjon av bærende elementer brukt i bygg- og anleggsbransjen står for store deler av den globale karbondioksidproduksjonen. Tilrettelegging for fremtidig ombruk og implementering av ombrukte elementer burde være en viktig del i prosjekteringen av bygninger. Ombruk av hulldekker er anvendt i nisjeprosjekter, men nylig publiserte standarder beskriver behandlingsprosesser som skal sikre kvaliteten av ombrukbare elementer. Kombinasjonen av disse med andre miljøvennlige materialer, som tre, kan redusere klimagassutslippene. Denne oppgaven ser på den dynamiske oppførselen til et 8-etasjers bygg med momentstive rammer, CLT vegger og hulldekke som etasjeskiller gjennom numerisk analyse. I tillegg til rotasjonsfritt og helt momentstivt knutepunkt blir fire ulike bjelke-søyle forbindelser fra tidligere forskning implementert i modellen og undersøkt ved bruk av rotasjonstive fjærer. Resultatene viser at når forbindelser med lav rotasjonsstivhet implementeres i modellen er byggets første mode en torsjonsmode. Ved oppnåelse av 90% modal masse i de to globale hovedretningene er to torsjonsmoder innkludert. Ved å øke rotasjonsstivheten flyttes første torsjonsmode fra første mode til moder med høyere frekvens. Modal respons spektrum analyse etter Eurokode 8 er gjennomført for alle situasjoner ved bruk av komplett kvadratisk kombinasjon. For en bygning i områder med lav seismisk aktivitet er verken forskyvningene i bygget eller kapasiteten til elementene overskridet for alle forbindelsene. Ombrukspotensialet til komponentene i alle forbindelsene er diskutert, og en evaluering av kompleksiteten og arbeidstimer knyttet til montering og demontering av forbindelsen er gjort. Den tradisjonelle boltede forbindelsen tilbyr størst fleksibilitet og høyest ombrukspotensiale.M-B

From hospital to urban centre: transforming SUS Våland

The objective of this thesis is to explore the transformation of the Våland hospital as the hospital functions are set to move to Ullandhaug. The research question guiding this study is: How can the current hospital area be transformed into a new vibrant and multifunctional area covering the demands of the 21st century? The study employs comprehensive research methodology, including literature review, analysis of the physical properties of the area, and the creation of a design proposal. These methods were chosen to gather relevant information, identify challenges, and propose feasible solutions for the development of the Våland hospital grounds. Through the analysis, several challenges were identified, including barrier effects, the presence of large existing building masses, and a lack of identity. Understanding these challenges is important for addressing the needs and opportunities of the area effectively. The proposed design framework focuses on redifining the purpose of existing buildings based on their functional and aesthetic potential. It also includes a well-connected road network design, measures for improved connectivity and traffic management, the integration of green spaces, and the establishment of a historical quarter to enhance the area’s identity This master thesis serves as an inspirational starting point for future discussions, collaborations, and refinement of the development plans for the Våland hospital area. By addressing the research question and proposing a comprehensive design framework, this study contributes to the realization of a vibrant, connected, and identity-driven urban area that covers the demands of the 21st century

Secure coding through integration of public information security sources to eclipse development environment

The use of open source components in software development has been growing at a rapid pace for a number of years. This increase in use of open source software is accompanied by an increase in the risk of security vulnerabilities. With an extensive amount of research and time spent towards the development of tools to help mitigate security vulnerabilities in developers' own code, the issue of identifying vulnerabilities in the open source components they use has been rather neglected by comparison. Public security source such as NVD, CVE and CWE already contain an enormous amount of data on both security vulnerabilities in general, as well as specific known instances of vulnerabilities in software. The primary goal of this thesis is to develop a plugin for the Eclipse development environment which seeks to connect developers to these public security sources directly in their IDE. The plugin will specifically be targeted at maven projects, and will help mitigate potential vulnerabilities by scanning the dependencies of a project and finding any potential vulnerability data for them registered in the NVD. The plugin will be evaluated by utilizing open source dependencies and projects in various tests which seek to identify its performance related to soundness and completeness, as well as runtime performance. The results show a precision of 93%, a recall of 65% and an accuracy of 80%. The runtime performance is shown to be moderate with a linear growth depending on the number of dependencies being scanned. This thesis contributes to research by shedding a light on an under-developed field of software security mitigation and proposes a prototype plugin to help solve the issue.Masteroppgave i Programutvikling samarbeid med HVLPROG399MAMN-PRO

Machine learning and electronic health records

In this work, we investigate the benefits and complications of using machine learning on EHR data. We survey some recent literature and conduct experiments on real data collected from hospital EHR systems.Masteroppgave i informatikkINF399MAMN-INFMAMN-PRO

Modelling of Low Salinity Surfactant Polymer Coreflood Experiments

In recent years, there has been a growing interest in the effect of varying brine composition during waterflooding. Several studies on low salinity water injection have been conducted, and the results indicate a potential for increased oil recovery at reduced salinity. Further studies have also shown a significant increase in oil recovery when low salinity injection is combined with surfactant and polymer flooding. This is attributed to the mobilization of oil during low salinity and surfactant floods, and the increased volumetric sweep from polymer injection. In this thesis, modelling of low salinity surfactant polymer (LSSP) coreflood experiments is investigated. The simulations presented in the study was conducted by using the chemical simulator STARS by CMG (Computer Modelling Group). Sensitivity and verification studies were performed in order to confirm STARS’ capabilities of modelling coreflood experiments, and to determine how altering key parameters affected the simulation results. This was followed by a history matching study of a LSSP coreflood experiment conducted by UniResearch CIPR. For the history matching, salinity dependent oil and water relative permeability was used to model low salinity waterflooding. This was based on an assumption that the injection of low salinity brine induced a wettability alteration in the core. Low salinity surfactant injection was modelled by enabling interpolation based on capillary number. The low salinity polymer solution was modelled as a viscosity effect only, due to interpolation problems when adding a third interpolation routine in the model. The experimental oil recovery and differential pressure from the experiment was successfully history matched using the described model. The results thus confirmed that STARS is capable of modelling complex coreflooding processes such as LSSP floods. However, since the model was limited to only two interpolation routines, the physical effects of each injection sequence was not accurately represented.Masteroppgave i petroleumsteknologiMAMN-PETRPTEK39

Open Access as publication method at the Faculty of Humanities, Social Sciences and Education, UiT. A feasibility study conducted among academics at the faculty to determine usage and consensus regarding Open Access publishing practices

This master thesis explores the landscape of scholarly publishing by presenting a study done at the Faculty of Humanities, Social Sciences and Education (HSL) at UiT the Arctic University of Norway to assess publication practices and attitudes with the focus being on Open Access (OA). For this study, 444 journal publications from the faculty in 2016 and 2017 were analyzed alongside a survey asking about attitudes to OA sent to researchers at the faculty which received 164 responses. The findings showed that respondents overall were very positive to OA and that one out of four publications in 2016 and 2017 were published OA. More detailed analyses revealed that women published OA to a higher degree than men in terms of percentages but that men in overall published more than women. Across all age groups, attitudes towards OA were positive to similar degrees. An important finding was that researchers reported a lack of OA publication channels in some academic fields, an issue that causes problems in relation to Plan S, a campaign launched by the EU to mandate that all research financed by the EU is to be published OA from 2021.

Does climate transition investments pay off? An empirical analysis of active Nordic funds and performance effects of exposure to carbon transition risk

Sustainable finance and investment strategies have received increasing attention the previous years. In this thesis, we investigate the performance effects of carbon transition risk exposure in Nordic mutual funds. The analysis is restricted to 655 funds between the period from March 2017 to September 2022. We provide evidence that carbon transition risk does not independently impact the risk-adjusted performance in Nordic mutual funds. This result is inconsistent with existing literature on the topic where expanding carbon transition risk has a negative impact on performance. Furthermore, we conduct a portfolio analysis where we investigate the impact of active management on performance within high and low carbon risk environments. Including this perspective does not change the result, and we conclude that the carbon risk does not impact risk-adjusted performance in our sample. As we find that carbon risk is closely related to volatility and systematic risk, we hypothesize that carbon risk are increasingly accounted for by financial risk. This could explain why our findings deviate from the literature, as indirectly changing financial risk would not change the risk-adjusted performance. The decreasing performance of growth stocks due to rising interest rates could also eliminate the excess risk-adjusted return of low carbon risk funds.nhhma