Chalmers Open Digital Repository

Välkommen till Chalmers öppna digitala arkiv!

Här hittar du:

  • Studentarbeten utgivna på lärosätet, såväl kandidatarbeten som examensarbeten på grund- och masternivå
  • Digitala specialsamlingar, som t ex Chalmers modellkammare
  • Utvalda projektrapporter
 

Enheter i Chalmers ODR

Välj en enhet för att se alla samlingar.

Senast inlagda

Improving Railway Punctuality: A Comparative Multi-Criteria Analysis of Solutions Across Six Nations
(2025) Ek, Ludvig; Gkaintatzis , Theodoros
This project is a part of a master’s program course named “Project in Railway Technology”, with 7.5 ECTS credits. The report analyzes the issue of punctuality of railways in six nations – Sweden, Greece, Japan, Finland, Germany and France – and observes the massive variations between the quality of infrastructure, operating efficiency and investment. It evaluates three principal solutions to improve punctuality: enhancing from single to double tracks, running dedicated high-speed trains, and timetabling. In a Multi-Criteria Decision Analysis (MCDA), the report compares these approaches in terms of cost, safety, capacity and time to implement, taking into consideration the perspective of various stakeholders, such as rail operators and travelers. The findings of the MCDA suggest that while investments in infrastructure guarantee longer term benefits, timetabling is a cheap and simple measure to adopt in order to increase punctuality. It concludes that railway punctuality must not only be improved through technical aspect, but also through strategic planning and cooperation of stakeholders.
Synthesis and performance assessment of nanofibrous oxygen carriers in chemical looping dry reforming of methane
(2025) Sandell, Erik
Chemical looping technology is an interesting method of utilizing carbonaceous fu els while alleviating some of the environmental impacts of its usage. It has been previously implemented in combustion processes and further research is being con ducted to investigate its potential in other processes such as methane reformation. For chemical looping technology to be viable in this application there is a need for efficient oxygen carrying materials. This thesis aimed to synthesize and test an oxygen carrying material with a nanofibrous structure which could be used in dry methane reformation applications. Using electrospinning, a substrate of was synthe sized on which metals could be impregnated resulting in a nanofibrous material with metal oxides bound to an alumina fibrous substrate. The metals investigated in this project was iron, cerium, manganese, strontium and nickel. These materials were chosen due to their relative abundance and iron was the main metal constituent of the materials, while the other metals was used as dopants. The resulting materials were used in methane reformation successfully, with iron-nickel and iron-Strontium being the most effective of the materials investigated.
Project management in tenant customization: A case study on collaboration, flexibility, and the future Office
(2025) Niemer, Jakob; Schulz, Edvin
This study explores how project management can support flexible tenant customizations that align with future office trends. Through a qualitative case study in collaboration with the consultancy firm Tenant & Partner, the research investigates the role of the project manager in facilitating collaboration, communication, and adaptability in customization projects. The findings show that early involvement of stakeholders, clear communication, and a shared understanding of goals between property owners and tenants are critical to achieving successful outcomes. The study also emphasizes the importance of aligning contractual agreements between the property owner, tenant, and construction contractor to ensure a smooth process. Overall, the report highlights the project manager’s central role in balancing different stakeholder interests and guiding the customization process toward solutions that support both current needs and future flexibility.
Enhancing BIM quality through information validation: Exploring the effectiveness of information delivery specification (IDS) in the Swedish construction industry
(2025) Pusa, Linn; Frendberg, Clara
The full potential of BIM is rarely fulfilled, due to the information gap between the design and construction phases and the design and management. To increase the reliability of BIM models, buildingSMART created the Information Delivery Specification (IDS), a standard to structure and specify information requirements. The full potential of IDS has not yet been demonstrated due to limited knowledge, awareness, and adaptation, highlighting the need to investigate how IDS can be implemented to obtain higher-quality BIM models. Drawing on qualitative data from interviews and observations from testing IDS in old projects, conclusions on advantages, challenges, and potential improvements associated with the use of IDS have been determined. The results show that current methods of validating infor mation requirements are incomplete as many requirements are not fulfilled. The findings show that IDS is an effective tool to automatically validate information requirements and achieve a higher quality of BIM data. This supports the use of the BIM model during the building’s whole lifecycle. The study also shows the need for increased knowledge and awareness of the benefits of IDS to support broader adoption in the industry. Standardized requirement specifications and classification are also necessary for smoother implementation.