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
Forskningspublikationer, rapporter och avhandlingar hittar du i research.chalmers.se
Enheter i Chalmers ODR
Välj en enhet för att se alla samlingar.
Senast publicerade
- Bridging Infrastructure; A Broad Study, Applied On Älvängen(2025) Berntsson, HelgeAs society has developed and expanded, the transport network has grown. The small, simple path has turned into a street, and today that street is a motorway that runs straight through the community. This is a common sight in towns that have grown with the car, and it’s a structure that creates infrastructure barriers. An obstacle along someone’s path, creating barrier effects. This structure exists today in Älvängen. The motorway and railway separate large areas next to the town centre, but the barrier effects can be considered minor as there is currently no attraction to the separated areas. This may change if the municipality’s visions for the future are realised. How can barrier effects then be prevented when the need to cross the motorway and railway is created? The foundation of the thesis is based on two theoretial oriented parts, one of which has been to test whether the conceptual model of barrier effects developed by Job van Eldijk as part of his research on infrastructure barriers can be used to develop a needs specification for a specific location, in this case Älvängen. The second part is a study of reference projects, using research for design as a methodology. How have infrastructure barriers been dealt with in different places around the world, and what can we learn from this? The lessons learned from the reference projects have then been used to create a number of design principles that should be taken into account and used when designing new pedestrian and cycle bridges with the aim of reducing barriers. These design principles have then been applied, together with the needs identified for Älvängen, to create a proposal for a new pedestrian and cycle bridge over the motorway and railway in Älvängen. A new pedestrian and cycle bridge that will help the residents of Älvängen to travel between the town centre and the green areas along the Göta Älv river, while minimising any future barrier effects that may arise. Finally, the lessons learned from the project as a whole are summarised, with a strong focus on footbridges, which have become the core of the project.
- Combining Fluorescence and Nanofluidic Scattering Microscopy For Biomolecule Characterization(2026) Sofra, ChristinaCharacterization of single biomolecules is fundamental for understanding biological processes at the molecular level. Although fluorescence microscopy using nanofluidic devices has been a longstanding workhorse for the study of single biomolecules, crucial limitations exist, with the main being alterations in structural conformation due to fluorophore binding. Techniques based on detection of scattering light, such as iSCAT (Interferometric scattering microscopy) microscopy, have emerged and evolved to label-free biolomecular probing techniques. Nanofluidic scattering microscopy (NSM), a technique relying on freely diffusing biomolecules inside nanofluidic structures, has also been developed the last years with impressive results as a reliable label-free characterization method. This thesis investigates the applicability of NSM as a label-free technique for the characterization of single DNA molecules confined inside nanochannels, using fluorescence microscopy as a reference method. Both measurements were performed under comparable experimental conditions to evaluate the capability of both techniques in determining DNA extension. In parallel, a dedicated analysis algorithm was developed for the fluorescence measurement technique, including automated molecular detection, trajectory extraction, and DNA length estimation using errorfunction fitting. Measurements were performed on DNA samples prepared in 0.5×TBE and 0.05×TBE. Fluorescence microscopy showed larger and more variable molecular extensions in 0.05×TBE, while NSM yielded similar median extensions under both conditions, with a broader distribution in 0.05×TBE. Correlated measurements showed a positive relationship between the two methods, although individual discrepancies and potential selection bias require further investigation before quantitative agreement can be established. The fluorescence analysis also requires further optimization for reliable measurements of DNA extension fluctuations. This work establishes an experimental and analytical framework for simultaneous fluorescence microscopy and NSM measurements of confined single DNA molecules.
- SCARS OF SETTLEMENTS; Destruction of mobility, identity, and urban space in Al-Khalil(2025) Barham, IsraThis thesis examines the fragmented urban landscape of Al-Khalil (Hebron), where the Zionist settler-colonial state («Israel») imposes severe restrictions on Palestinian mobility. Through architecture, urban planning, and physical barriers such as checkpoints, settlements, and militazy zones, the occupation reshapes daily life and transforms the relationship between people, space, and identity. My research focuses on how these spatial practices operate as tools of control, and how they affect the social fabric, sense of belonging, and lived realities of Palestinians. Because of the ongoing genocide in Ghaza (Gaza) (Amnesty International, 2024; Office of the United Nations High Commissioner for Human Rights, 2024) and the vulnerability of conducting on field research as a Palestinian myself, the study utilizes remote research methods. Conversations with Palestinian people, both who were and who are still in Al-Khalil, combined with mapping tools, provide critical insights into the social, psychological, and spatial effects of these restrictions and the highly oppressive spatial interventions. In addition to that, this research aims to raise awareness of how architecture functions as a tool of power and domination, emphasizing the need for a more conscious engagement with the built environment in contexts of occupation and segregation. Methodologically, the thesis is grounded in narrative and decolonial approaches, drawing on indigenous Storywork (Archibald, 2008), narrative analysis (Czarniawska, 2004), and decolonizing methodologies (Smith, 2022). These frameworks guide me to treat testimonies not as data but as living knowledge. Storytelling becomes central in my thesis. Tatreez (Palestinian embroidery) is woven into this process as both symbol and method. Through the slow, repetitive act of stitching in response to each testimony, I engaged with the stories in a way that allowed me to listen through the hands as well as the mind. The resulting visual works combined with Tatreez serve as another layer of interpretation, translating lived experiences into material form. By documenting the realities of daily life under occupation,and by centering Palestinian storytelling and embodied forms of making, I aim to contribute to a broader discussion on spatial justice, highlighting how architecture is used as a mechanism of domination, while also foregrounding the resilience, memory, and lived knowledge of Palestinians navigating an environment structured to control them.
- Auditory Size Perception in Acoustic Vehicle Alerting Systems (AVAS); Virtual Pitch and Spatial Decorrelation for Heavy Vehicles under Electroacoustic and Environmental Constraints(2026) Ocklund, AlveThe implementation of Acoustic Vehicle Alerting Systems (AVAS) has expanded as Electric Vehicles (EVs) become increasingly common on the roads. Due to their inherent lower acoustic radiation at low speeds, legislators have put regulatory demands, such as UN Regulation No. 138, on the acoustic radiation of these vehicles. These demands do not, however, differentiate between the type of vehicle, with the same requirements on passenger cars as for heavy electric trucks. This risks removing the auditory cues from the urban environment for differentiating size differences between vehicles, which may have a negative effect on the situational awareness of vulnerable road users and pedestrians, especially apparent for those visually impaired. This thesis investigates auditory cues governing size perception to enhance the perceived size of heavy electric vehicles without increasing urban low-frequency noise pollution or exceeding the physical constraints of standard AVAS speakers. The results of two listening tests are presented: the first was conducted by 17 participants and showed that while spectral balance is the main cue for auditory size perception, spatial decorrelation and time structure also can influence the perceived auditory size of a signal. Further, participants showed a preference for signals containing tonal components over those composed of pure broadband noise. The second test, conducted by 32 participants, applied the findings of the first, focusing on whether virtual pitch and spatial decorrelation could be used to increase the auditory size perception in an applied situation, convolving measured Impulse Responses (IRs) of a currently used AVAS speaker mounted at different positions on a representative truck. The results show that virtual pitch was highly effective at increasing the size perception of the signal, whilst spatial decorrelation was found not to be as effective due to the physical limitations of the implementation. Ultimately, utilizing the missing fundamental phenomenon to simulate virtual pitch allows for enhanced auditory size perception without the addition of low frequency components, effectively conveying vehicle mass without worsening urban noise pollution