Advanced search

Showing result 1 - 5 of 20 essays matching the above criteria.

1. 1. Numerical modeling of airflow on the cathode-side of a bipolar flow plate : How the formed geometry affects the pressure drop and flow distribution in a hydrogen fuel cell

   University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

   Author : Olivia Johansson; [2023]
   Keywords : Performance; Cross-sectional geometry; Computational fluid dynamics;

   Abstract : Climate change and rising temperatures is a well-known problem. To tackle global warming a transition from fossil fuels to renewable and reliable energy sources is necessary. Hydrogen, in fuel cells, is proposed to replace diesel and gasoline in the transport sector. READ MORE

3. 2. Machine Learning-based MIMO Indoor Positioning

   University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

   Author : Qiyi Chen; [2023]
   Keywords : Technology and Engineering;

   Abstract : The most widely used positioning system is Global Navigation Satellite System (GNSS), which uses traditional positioning techniques and cannot achieve satisfactory positioning performance in indoor scenarios due to Non-Line-of-Sight (NLoS) transmission. Fingerprinting is a non-traditional positioning technique that is robust to NLoS transmission in indoor scenarios. READ MORE

4. 3. Ökade produktionskostnader och krisberedskap : en intervjustudie från ekologiska nötköttsproducenters perspektiv

   University essay from SLU/Dept. of Urban and Rural Development

   Author : Hanna Lundberg; [2023]
   Keywords : lantbruk; nötköttsproduktion; livsmedelssystem; livsmedelssäkerhet; försäljningskanaler; krisberedskap;

   Abstract : Kriget i Ukraina har bidragit till stora utmaningar för dagens producenter i form av ökade produktionskostnader. Kostnader för insatsvaror, el och drivmedel har skjutit i höjden vilket har bidragit till att lantbrukare tvingats skära ner sin produktion eller i vissa fall lägga ner den helt (LRF 2022b). READ MORE

5. 4. Personalized Federated Learning for mmWave Beam Prediction Using Non-IID Sub-6 GHz Channels

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Yuan Cheng; [2022]
   Keywords : Personalized Federated Learning; Millimeter wave; Beamforming; DeepMIMO; Non-IID; Personaliserad Federad Inlärning; Millimetervågor; Strålformning; DeepMIMO; Icke-IID;

   Abstract : While it is difficult for base stations to estimate the millimeter wave (mmWave) channels and find the optimal mmWave beam for user equipments (UEs) quickly, the sub-6 GHz channels which are usually easier to obtain and more robust to blockages could be used to reduce the time before initial access and enhance the reliability of mmWave communication. Considering that the channel information is collected by a massive number of radio base stations and would be sensitive to privacy and security, Federated Learning (FL) is a match for this use case. READ MORE

6. 5. Are We Better off Alone? A Qualitative Study on Which Ways Digitalization has Impacted the Disintermediation in the Vehicle Industry

   University essay from Handelshögskolan i Stockholm/Institutionen för marknadsföring och strategi

   Author : Sofia Lerm; Sofia Ståhlfors; [2022]
   Keywords : Disintermediation; Internalization; Vehicle Industry; Digitalization; Supply Chain;

   Abstract : The paradigm shift in the vehicle industry, partly caused by digitalization and the conversion to electric alternatives, has pressured traditional manufacturers to reconsider pre-existing practices and distribution methods to align with market developments. By investigating digitalization's impact on disintermediation in the vehicle industry, and which considerations a firm should make when contemplating disintermediation, the purpose of the study is to provide a model proposition, suitable to use when considering disintermediation and integration of value-creating activities into the firm. READ MORE