Saudi Cultural Missions Theses & Dissertations
Permanent URI for this communityhttps://drepo.sdl.edu.sa/handle/20.500.14154/10
Browse
5 results
Search Results
Item Restricted A Sectorial Analysis of Municipal Water Consumption and Management(Universitat Politecnica De Valencia, 2023-11-15) Alhudaithi, Musaad Abdulaziz; Arregui de la Cruz, Francisco; Cobacho Jordan, RicardoThe Kingdom of Saudi Arabia is undergoing substantial economic, industrial, commercial, and population growth. This growth, in turn, leads to increased water demand in the region. In addition to population growth, industrialization and modernization have placed increasing pressure on KSA’s water infrastructure. There is an urgent need to increase the water capacity to meet the projected demand and maintain the water systems' security and reliability. Therefore, it is imperative to find solutions that improve the efficiency of the Kingdom’s water system. A key element in this effort is understanding and classifying how water is consumed with its micro-components within various segments. The thesis aims to collect precise knowledge about municipal water consumption patterns and trends to understand water consumption patterns and consumer behaviors better and develop preliminary estimates and assumptions. This will drive the municipal water demand model in KSA to be capable of dealing with different scenarios and constraints. The development of the municipal water demand model highlighted the need for reliable statistical and water billing data. These form the starting point of the forecast and need to be available at a high enough resolution. The model provides a framework for the required data to be built on further. The analysis results will also determine the drivers and categories used in the model. The model focuses on the non-Residential water demand. Still, separate forecasts are included for the residential category to enable the extrapolation of the results and downward analysis for a more accurate and cost-effective bottom-up approach to forecasting and an overall better understanding of the population’s water consumption behaviors.2 0Item Restricted Development and Impacts of Wireless Communication Systems(Queensland University of technology, 2022) Rubayan, Sultan; Kajewski, Stephen; Rose, TimThe specific aim of this research is to explore and analyze how wired communication systems are gradually being replaced with wireless ones in the context of construction projects. This centers on the technological advancements and new inventions that have come up to transform communications in construction operations in the past. A major goal of this research is to investigate the use of 5G networks along with the integration of Internet of Things (IoT) devices into the wireless communication technology among construction sites (Chowdhury et al., 2019). This aim mainly reflects a detailed study of the past, present and future wireless communication in the building sector which will help the industry experts as well as the researchers obtain good perspectives.20 0Item Restricted The Relationship Between Risk Management Practices and Investment Performance in the Context of OPEC and OPEC+(Saudi Digital Library, 2023) Alsalamah, Faisal; Park, SeyoungInvesting in a complicated market structure where it is managed by what economists refer to as a cartel can be challenging since the movement of the market can be unpredictable. Also, the application of the risk management practices can be beneficial in such market once the investor comprehends how the market operate. This literature will present the Relationship between risk management practices and investment performance in the context of OPEC and OPEC+.40 0Item Restricted A Critical Analysis of Associated British Foods PLC Shareholder Wealth Creation in The Five-Year Period from 2017 to 2021(Saudi Digital Library, 2023-11-06) Aladhi, Malak; Cooper, MaggieAttached is the master's project, which is a critical analysis of a British company16 0Item Restricted Analysis of biomimetic polymer brushes by XPS and optical spectroscopy(2023-01-31) Sari, Abdullah Ali; Leggett, GrahamA grand challenge for the past two decades has been to discover how to achieve efficient long- range transport of excitation in molecular photonic materials. Excitons (electron-hole pairs) are transported via incoherent hopping processes, with the effect that recombination rates are high and exciton diffusion lengths are short. The goal of this PhD has been to explore a new approach to the design of molecular photonic materials that combines biologically-inspired design with strong light-matter coupling. In strong light-matter coupling, a confined optical mode such as a localised surface plasmon resonance (LSPR) is hybridised with molecular excitons to yield new states that mix the properties of light and matter. Recent work demonstrated that light-harvesting complexes from plants and photosynthetic bacteria are coupled strongly to LSPRs associated with gold nanostructure arrays, yielding large coupling energies and coherent, ultra-fast energy transfer. However, proteins are not suitable for applications in electronic and optical devices. Thus, the goal of this thesis is to explore the construction of biomimetic plexcitonic antenna complexes, in which a synthetic polymer scaffold is used to organise pigment molecules within the near field associated with a metal nanoparticle. Chlorophyll a was isolated from spinach and the central magnesium ion replaced by Zn2+ to stabilise the molecule (ZnChla). The binding of ZnChla to poly(dimethyl aminoethyl methacrylate) (PDMA) was studied by X-ray photoelectron spectroscopy and optical spectroscopy. Concentrations of ZnChla of ~1 M were obtained, somewhat in excess of the concentrations found in plant light-harvesting complexes (~0.6 M). ZnChla is thought to coordinate to the PDMA scaffolds via the formation of coordination bonds from the tertiary nitrogens to the central metal ion. When these structures were formed on gold nanostructure arrays, splitting of the plasmon band was observed, consistent with the expected plasmon- exciton coupling. The coupling strength was found to be correlated with the concentration of ZnChla in the film, consistent with the expected behaviour if strong coupling occurred. However, 2 the largest coupling energy achieved was 0.16 eV, short of the strong coupling limit and suggesting that further optimisation of the system is required. Nile Red (NR) was derivatised to introduce an iodo-alkane linker for quaternisation to the PDMA scaffold. Binding of the dye to the scaffolds was characterised by XPS and UV-Vis measurements. Extinction spectra of gold nanostructure arrays displayed dramatic changes after binding of iodinated Nile Red (INR), consistent with strong plasmon-exciton coupling. However, time did not permit a detailed investigation of the correlation between the coupling strength and the concentration of dye in the film. As an alternative approach, scaffolds were grown from glass surfaces and metal nanoparticles were subsequently embedded in the polymer layer, after which ZnChla was attached to the scaffold. For gold nanoparticles (AuNPs), beside red shift of the LSPR of AuNPs, a new feature is observed at 2.48 eV, which is probably due to week interaction resulted from possible interference between the LSPR of AuNPs and the vibrational transitions of ZnChla. For aluminium nanoparticles (AlNPs), obtaining useful optical properties of AlNPs that can be used to create plexcitonic complexes using this route is supressed by the fast oxidation of AlNPs.30 0