Contributions to the maximization of the useful life of the large size telescopes of the project Cherenkov Telescope Array

Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Físicas, leída el 14-02-2022Todos ellos, entre otros, son instrumentos que permiten obtener información distinta y complementaria de la radiación emitida por la materia que existe en el universo. La parte de la radiación que se produce a las más altas energías de fotón que se conocen hoy en día genera una cascada de partículas subatómicas al incidir en la atmósfera terrestre. Esta cascada es la que da origen a la luz detectada por los telescopios que se han estudiado en esta tesis: los telescopios de gran tamaño (LST) de los futuros observatorios Cherenkov Telescope Array (CTA).Habrá dos grupos de telescopis CTA, CTA-Norte en La Palma, España, y CTA-Sur en Atacama, Chile. Actualmente solo un telescopio de CTA-Norte está construido, el LST1, el cual está en fase de puesta en marcha.La vida útil estimada de los LST es de 30 años. Tratar de investigar qué podemos hacer para prolongar esta vida útil de los LST en CTA-Norte es el principal objetivo de esta tesis. Al mismo tiempo, se pretende exponer y defender una serie de recomendaciones prácticas, así como proporcionar información relevante, que puedan ayudar a incrementar la disponibilidad de estos telescopios durante su funcionamiento, reduciendo los esfuerzos de mantenimiento y mejorando la fiabilidad de los subsistemas...All of them, among others, are instruments that allow us to obtain different and complementary information on the radiation emitted by the matter that exists in the universe. The part of the radiation that is produced at the highest photon energies known today generates a cascade of subatomic particles by impacting the Earth's atmosphere. This cascade is what gives rise to the light detected by the telescopes studied in this thesis: the Large Size Telescopes (LST) of the future Cherenkov Telescope Array (CTA) observatory.There will be two CTA observation stations, Northern Array in La Palma, Spain, and CTA-South in Atacama, Chile. Currently only one telescope from CTA-North has been built, the LST1, and it is in commissioning phase.The expected lifespan of LST is 30 years. To try to investigate what can be done to enlarge this lifespan in CTA-North is the main objective of this thesis. At the same time, it is intended to present and defend a series of practical recommendations, as well as to provide relevant information, that can help to increase the availability of these telescopes during their operation, reducing maintenance efforts and improving the reliability of the subsystems...Fac. de Ciencias FísicasTRUEunpu

Collaborative electronic purchasing within an SME consortium

The main function of purchasing is to assure the supply with required goods and services. Large organisations have both finances and knowledge to implement optimised purchasing resources, typically using information and communications technology (ICT) to improve efficiency. On the contrary, within individual small and medium sized enterprises electronic purchasing is conducted predominately through supplier's sales web sites.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Semantic discovery and reuse of business process patterns

Patterns currently play an important role in modern information systems (IS) development and their use has mainly been restricted to the design and implementation phases of the development lifecycle. Given the increasing significance of business modelling in IS development, patterns have the potential of providing a viable solution for promoting reusability of recurrent generalized models in the very early stages of development. As a statement of research-in-progress this paper focuses on business process patterns and proposes an initial methodological framework for the discovery and reuse of business process patterns within the IS development lifecycle. The framework borrows ideas from the domain engineering literature and proposes the use of semantics to drive both the discovery of patterns as well as their reuse

RFID Technology in Intelligent Tracking Systems in Construction Waste Logistics Using Optimisation Techniques

Construction waste disposal is an urgent issue for protecting our environment. This paper proposes a waste management system and illustrates the work process using plasterboard waste as an example, which creates a hazardous gas when land filled with household waste, and for which the recycling rate is less than 10% in the UK. The proposed system integrates RFID technology, Rule-Based Reasoning, Ant Colony optimization and knowledge technology for auditing and tracking plasterboard waste, guiding the operation staff, arranging vehicles, schedule planning, and also provides evidence to verify its disposal. It h relies on RFID equipment for collecting logistical data and uses digital imaging equipment to give further evidence; the reasoning core in the third layer is responsible for generating schedules and route plans and guidance, and the last layer delivers the result to inform users. The paper firstly introduces the current plasterboard disposal situation and addresses the logistical problem that is now the main barrier to a higher recycling rate, followed by discussion of the proposed system in terms of both system level structure and process structure. And finally, an example scenario will be given to illustrate the system’s utilization

Database development and intranet based image included database management system for ballistic firearm identification system

The process of imaging, collecting and searching a cartridge case to identifying its suspected firearm is a time consuming procedure. Within this study, a cartridge case identification database management system in an Intranet environment is designed and implemented, thus enabling firearm examiners from different forensic laboratories to engage firearm identification without the constraints of time and location. Specifically, the study investigates appropriate database management system for image involved and Intranet secured ballistics firearm identification database. The results demonstrated that a computerized firearm identification system could be implemented in Intranet with a secure, scalable, performable Intranet database management system