Search results for "raft"
showing 10 items of 1545 documents
Characterization of coating on graphite anode material for lithium-ion batteries
2021
Master's thesis in Renewable energy (ENE500) To improve the performance of lithium-ion batteries, the graphite anode can be treated with special coating. Thus the charge transfer resistance through the material can be lowered and thereby enable e.g. faster charging. The amount of coating is essential the improve the performance. The thesis is investigating thermogravimetric and electrochemical impedance spectroscopy as a method to identify an optimal relation between the amount of coating and the charge transfer resistance. There is found that lower material resistivity gives a higher weight loss where it is assumed that the coating is oxidising, methods for both a relative difference in th…
Ammonia Fuelled Solid Oxide Fuel Cell to Power Maritime Applications
2021
Master's thesis in Renewable energy (ENE500) Ammonia fuelled solid oxide fuel cell (SOFC) systems are regarded as a promising alternative for energy production due to high efficiency and low environmental impact. Ammonia is a carbon free compound with high energy density, low production cost and much simpler transport-and storage properties than hydrogen. The state-of-the-art SOFC contains a Ni/YSZ anode which has proven to be an effective catalyst to crack ammonia at intermediate temperatures (∼700°C). In this study an experimental work was conducted using an Open Flange SOFC test set-up with a planar anode-supported single cell consisting of a Ni/YSZ anode, YSZ electrolyte, and LSM cathod…
Life Cycle Assessment of a Battery Passenger Ferry
2017
Master's thesis Renewable Energy ENE500 - University of Agder 2017 Konfidensiell til / confidential until 01-07-2022
A novel learning automata game with local feedback for parallel optimization of hydropower production
2017
Master's thesis Information- and communication technology IKT590 - University of Agder 2017 Hydropower optimization for multi-reservoir systems is classi ed as a combinatorial optimization problem with large state-space that is particularly di cult to solve. There exist no golden standard when solving such problems, and many proposed algorithms are domain speci c. The literature describes several di erent techniques where linear programming approaches are extensively discussed, but tends to succumb to the curse of dimensionality problem when the state vector dimensions increase. This thesis introduces LA LCS, a novel learning automata algorithm that utilizes a parallel form of local feedbac…
Transition to a fossil- and emission-free construction industry
2018
Master's thesis Industrial Economics and Technology Management IND590 - University of Agder 2018 The object for this thesis is to see how Nettpartner, which is Norway’s largest electrical infrastructure contractor, can contribute to the green change in the construction industry. To go green has become a big topic in the Norwegian construction industry during the last few years, and in 2017 a report concluded that the Norwegian construction industry could reduce their emissions of greenhouse gases with close to 99 % if the industry planned better before they started building. The method used in this research is the constructive research. The aim of constructive research is to solve practical…
Sieviešu izglītības atainojums angļu literatūrā – no Mērijas Volstonkraftas līdz Enidai Blaitonai
2018
Bakalaura darbs ir veltīts sieviešu izglītības atainojumam angļu literatūrā. Teorētiskajā daļā ir apskatīta sieviešu izglītības vēsture Lielbritānijā ietverot tradicionālos uzskatus par sieviešu intelektu, feminisma ideju attīstību un uzlabojumiem sieviešu tiesību jomā, tradicionālo meiteņu izglītību 18. un19. gadsimtā, kā arī 19. gadsimta otrās puses un 20. gadsimta pirmās puses izglītības reformas. Pētījuma mērķis ir izpētīt, analizēt un salīdzināt sieviešu izglītības atainojumu sekojošos darbos: Mērijas Volstonkraftas ″Sieviešu tiesību aizstāvība″, Šarlotes Brontē ″Džeina Eira″, Annas Brontē ″Agnese Greja″ un Enidas Blaitonas ″Pirmais semestris Meloriju torņos″. Pētījuma gaitā tika izman…
Endothelin-1-Mediated Drug Resistance in EGFR-Mutant Non-Small Cell Lung Carcinoma.
2020
Abstract Progression on therapy in non-small cell lung carcinoma (NSCLC) is often evaluated radiographically, however, image-based evaluation of said therapies may not distinguish disease progression due to intrinsic tumor drug resistance or inefficient tumor penetration of the drugs. Here we report that the inhibition of mutated EGFR promotes the secretion of a potent vasoconstrictor, endothelin-1 (EDN1), which continues to increase as the cells become resistant with a mesenchymal phenotype. As EDN1 and its receptor (EDNR) is linked to cancer progression, EDNR-antagonists have been evaluated in several clinical trials with disappointing results. These trials were based on a hypothesis that…
VEGF-targeted therapy stably modulates the glycolytic phenotype of tumor cells
2014
Abstract Anti-VEGF therapy perturbs tumor metabolism, severely impairing oxygen, glucose, and ATP levels. In this study, we investigated the effects of anti-VEGF therapy in multiple experimental tumor models that differ in their glycolytic phenotypes to gain insights into optimal modulation of the metabolic features of this therapy. Prolonged treatments induced vascular regression and necrosis in tumor xenograft models, with highly glycolytic tumors becoming treatment resistant more rapidly than poorly glycolytic tumors. By PET imaging, prolonged treatments yielded an increase in both hypoxic and proliferative regions of tumors. A selection for highly glycolytic cells was noted and this met…
Increased basic fibroblast growth factor release and proliferation in xenotransplanted squamous cell carcinoma after combined irradiation/anti-vascul…
2012
Novel strategies of cancer therapy combine irradiation and anti-angiogenic active compounds. However, little is known concerning the undesired cellular and molecular effects caused by this novel treatment concept. We used a mouse squamous cell carcinoma (SCC) xenotransplantation model to evaluate the potential undesired effects which compromise the success of this therapeutic combination. SCCs were subcutanously implanted in nude mice. Animals were treated with a fractionated irradiation scheme (5x4 Gy) alone or in combination with daily injections of anti-vascular endothelial growth factor (VEGF) antibodies. Controls remained untreated. Before and after treatment, resonance imaging (MRI), …
The impact of tumor nitric oxide production on VEGFA expression and tumor growth in a zebrafish rat glioma xenograft model.
2015
International audience; To investigate the effect of nitric oxide on tumor development, we established a rat tumor xenograft model in zebrafish embryos. The injected tumor cells formed masses in which nitric oxide production could be detected by the use of the cell-permeant DAF-FM-DA (diaminofluorophore 4-amino-5-methylamino-2'-7'-difluorofluorescein diacetate) and DAR-4M-AM (diaminorhodamine-4M). This method revealed that nitric oxide production could be co-localized with the tumor xenograft in 46% of the embryos. In 85% of these embryos, tumors were vascularized and blood vessels were observed on day 4 post injection. Furthermore, we demonstrated by qRT-PCR that the transplanted glioma ce…