Browsar Tracks – lärande och lärandemiljö // Tracks – learning and teaching environment efter Publicerad
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- PostExploring a new energy-efficient way to heat water: Design of a heat exchanger for laundry machine applications produced using additive manufacturing(2020) Dybeck Carlsson, Simon; Hamulczuk, Dominika; Raja, Shanjith; Chalmers tekniska högskola; Schulz, Fiona; Schulz, Fiona
- PostFramework for studying the flow of people at campus Johanneberg: A way to streamline the resource use(2020) de la Fuente Crespo, Elena; Hamnesjö Olausson, Johnny; Nonnengiesser, Felix; Sandolf, Emilia; Chalmers tekniska högskola; Kaczorowska, Anna; Kaczorowska, Anna
- PostA digital twin of food waste: to understand the behavior of waste and to reduce it(2020) Kraemer, Joline; Mur, Klaudia; Rehnberg, Oskar; Chalmers tekniska högskola; Kaczorowska, Anna; Kaczorowska, Anna
- PostThe best campus when it rains: A design proposal for blue infrastructure on Chalmers campus Johanneberg(2020) Fritz, Jonas Herbert; Kristiansson, Jonathan; Lindborg, Maja; Yaowapatsiri, Premthip; Chalmers tekniska högskola; Kaczorowska, Anna; Kaczorowska, Anna
- PostWorkshops in a virtual space: A design study of online education towards enhanced collaboration(2020) Edstam, Frida; Engman Otréus, Björn; Pradhan, Shameer Kumar; Chalmers tekniska högskola; Kaczorowska, Anna; Kaczorowska, Anna
- PostCreation of conceptual challenge-driven space to foster trans-disciplinary collaboration at Chalmers campus Johanneberg(2020) Fischer, Frida; Jensen, Tove; Riestra Nava, Illán; Chalmers tekniska högskola; Kaczorowska, Anna; Kaczorowska, Anna
- PostA sustainable marine transport sector(2021) Alvelid, Carl; Schmidt, Daniel; Ljunge, Jonna; Gutke, Julia; Pai, Rahul Rajendra; Muthukrishnan, Shruthik Krishnan; Chalmers tekniska högskola; Sjöblom, Jonas; Sjöblom, JonasIn today’s highly globalised world, marine transport accounts for an important mode of travel as well as a key means of enabling transcontinental trade. There is an urgent need for a shift towards a more sustainable marine sector as the demand for at sea transport and shipping increases annually with rising levels of harmful emissions as a result. Moreover, the future of the fossil fuels currently employed for marine vessel propulsion is most unclear. The widely used Heavy Fuel Oil might become subject to highly volatile pricing as the global market moves towards reducing its fossil dependence. Also, stricter emission norms intended to bring the marine transport sector closer to the legislative levels already developed in land-based transportation are to be expected. This report introduces and discusses a selection of emissions-reducing measures which could contribute to a more sustainable marine transport sector, namely, biofuels, solar panels and electrification, hydrogen, fuel cells, methanol, speed reductions and wind power. Ultimately, wind power is chosen as a final suggestion with respect to lowering marine emissions. Wind is a free, renewable, and abundant form of energy especially suitable for marine transport and its extraction for marine vessel propulsion does not induce resource scarcity in other sectors. Biofuels are more expensive than the current fuels in use and pose environmental and ethical dilemmas related to land use change with the potential of creating distributional conflicts. When compared to other options, fully wind powered ships have the unparalleled benefit of zero emissions in theory. In contrast to solar power, wind power alone is sufficient for vessel propulsion although there is need for alternative methods if the wind direction and magnitude does not meet the requirements. Electric vessels struggle with low energy density in batteries and a complete lack of charging infrastructure, only permitting shorter voyages inadequate for meeting the demand for worldwide transport. Hydrogen fuels cause a considerable loss of usable shipping volume, and thus profit, due to its low volumetric density. Finally, from a stakeholder perspective it is argued that although initial investments may be high due to re-equipping or replacing of ships, wind power is a viable economic solution long-term as the “fuel” is inherently abundant and free. Also, a zero-emissions option like wind power is likely to be favourable in the eyes of authorities which are able to introduce policy instruments supporting the transition to a wind-powered marine future.
- PostQuantum Limited Amplifier: Design, Fabrication and Characterization of a Superconducting NbTiN Kinetic Inductance Travelling Wave Parametric Amplifier(2021) Alcalde-Herraiz, Núria; Andersson, Linus; Hagström, Ivan; Jamet Suria, Paul; Chalmers tekniska högskola; Geresdi, Attila; Geresdi, Attila; Gasparinetti, SimoneThe aim of this project was to design, fabricate and characterize a kinetic inductance travelling wave parametric amplifier (KI-TWPA) for cryogenic temperatures (10 mk) by adapting the design of Malnou et.al PRX Quantum (2020)  for a sapphire substrate of 430 μm. By utilizing the properties of periodic structures in a transmission line, the dispersive properties of the device could be modified, enabling phase matching of the signal and pump frequencies. The pattern was designed on Klayout, simulated in Sonnet and fabricated in Chalmers MC2 cleanroom by sputtering of NbTiN, Electron beam lithography and Reactive ion etching. Additionally, a cryogenic microwave packaging was designed and fabricated. The packaging consists of a PCB designed in KiCad and a copper box designed in Autodesk Inventor. The PCB consists of two copper layers with Rogers RO4350B dielectric material in between the layers. The transmission line showed good matching in the frequency region of importance. When designing the copper box, the dominant cavity and chip resonant frequencies were engineered to exist outside the band of operation. The microwave properties of the PCB and copper box were simulated using COMSOL. The superconductive device was measured at cryogenic temperatures and important device parameters were characterised. In particular, the kinetic inductance of the sample was characterised as well as the critical current of the device. The order of non-linearity was found to be I∗ = 7.33 - 8.26 mA and the critical current Ic = 2.2 mA. Through measurements of the transmission, the passband and stopband characteristics of the periodic structure were obtained. Thus, acquiring key parameters for the device. Due to fabrication issues, only one of the samples with a shorter amplification path could be measured. Therefore, signal gain could not be observed on the measured device since the gain is heavily dependant on the length of the transmission line.
- PostAutomating Qubit Tune-up and Mixer Calibration(2021) Abram, Hari; Jirlow, Martin; Heuts, Olivia; Chalmers tekniska högskola; Geresdi, Attila; Eriksson, Axel; Castillo Moreno, ClaudiaIn this project we write scripts to automate qubit tune-up and mixer calibration, with the aid of the Labber instrument software and the Labber Python API. The python scripts are written to perform the measurements on two microwave platforms, Vivace and Keysight. The scripts then process the data from the measurements to extract the desired measures for qubit tuneup and mixer calibration. To conclude we note that although the scripts are able to perform there is still much room for improvement.
- Post8coin.bit(2021) Eglitis, Martin; Chalmers tekniska högskola; Strong Hansen, Kathryn; Strong Hansen, Kathryn
- PostSwitch-off(2021) Hamulczuk, Dominika; Chalmers tekniska högskola; Strong Hansen, Kathryn; Strong Hansen, Kathryn
- PostCompiling Quantum Conditionals in a Functional Language(2021) Botö, Nicklas; Forslund, Fabian; Chalmers tekniska högskola; Geresdi, Attila; Geresdi, AttilaWe present the functional quantum programming language Signe. The language features type inference, quantum conditionals, and compiles to multiple low-level representations. A compiler for Signe is presented with an implementation in Haskell. The compiler uses a Hindley-Milner type system, linearity checking, compilation to circuit and matrix data types, and a modern, user-friendly syntax in the functional style. The operational semantics are described in terms of the category of finite quantum computations FQC. Signe’s semantics and the FQC category are based on the QML language by Altenkirch and Grattage [1, 5, 4].
- PostGenetic engineering, a further step for humanity or a dangerous pitfall?(2021) Mazzanti, Jacopo; Chalmers tekniska högskola; Strong Hansen, Kathryn; Strong Hansen, Kathryn
- PostImplementing and optimizing Shor’s algorithm for native gate sets using Qiskit(2021) Ciroth, Nils; Offermann, Tobias; Chalmers tekniska högskola; Geresdi, Attila; Fitzek, David; Gasparinetti, Simone
- PostHow the future is shaped with PV and energy storages for small scale construction- economic, environmental, social and technical aspects(2022) Zabian, Omar Marwan Rafiq; Blanksvärd, Ellen; Larsson, Hanna; Chalmers tekniska högskola; Albinsson, Bo; Abrahamsson, Maria; Albinsson, Bo; Sandén, Björn
- PostElectrochemical evaluation of catalyst materials for PEM-fuel cell reaction(2022) Kumar Tiwari, Rahul; Maillet, Christophe; Chalmers tekniska högskola; Wickman, Björn; Mohan, Roopathy
- PostFuel Cell Multiphase Modelling and Materials Design Optimization: Methodology(2022) Mattson, Klara; Muralidharan, Harikrishnan; Chalmers tekniska högskola; Wickman, Björn; Maggiolo, Dario
- PostCase study of an off-grid house energy system(2022) Adolfsson, Ebba; Karling, Linus; Márquez Lopéz, Guillermo; Hellekant, Josefin; Chalmers tekniska högskola; Albinsson, Bo; Albinsson, Bo
- PostLimited resources for fuel cell expansion(2022) Bhagwat, Ashwin; Grip, Daniel; Manns, Theresia; Chalmers tekniska högskola; Wickman, Björn; Grahn, Maria; Brynolf, Selma
- PostAssessment Of The Recycling Concept For Fuel Cell(2022) Mohamed, Khalil; Marcon, Simao; Chalmers tekniska högskola; Wickman, Björn; Petranikova, Martina