ULPGC accedaCRIS Colección:

La Estimulación Eléctrica Transcutánea Como Mecanismo De Control Del Dolor En La Rehabilitación Tras La Cirugía De Tórax. Un Estudio Prospectivo Y Aleatorizado.

2026-05-18T15:30:49Z

Título: La Estimulación Eléctrica Transcutánea Como Mecanismo De Control Del Dolor En La Rehabilitación Tras La Cirugía De Tórax. Un Estudio Prospectivo Y Aleatorizado. Autores/as: Álamo Arce, Daniel David Descripción: Programa de Doctorado en Investigación Aplicada a las Ciencias Sanitarias por la Universidad de Las Palmas de Gran Canaria; la Universidad de León y Universidade de Trás-os-Montes e Alto Douro

Vigilancia Sanitaria en Avifauna Canaria: Detección y caracterización molecular de herpesvirus, avipoxvirus y hemoparásitos en el alcaraván (Burhinus oedicnemus)

2026-05-18T15:06:13Z

Título: Vigilancia Sanitaria en Avifauna Canaria: Detección y caracterización molecular de herpesvirus, avipoxvirus y hemoparásitos en el alcaraván (Burhinus oedicnemus) Autores/as: Colom Rivero, Ana Descripción: Programa de Doctorado en Sanidad Animal y Seguridad Alimentaria por la Universidad de Las Palmas de Gran Canaria

Contribution to the study of security in optical wireless communication networks

2026-05-18T06:36:04Z

Título: Contribution to the study of security in optical wireless communication networks Autores/as: Marín García, Ignacio Resumen: Visible Light Communication (VLC) is an optical wireless communication technology that exploits the visible spectrum to transmit data, typically by reusing existing lighting infrastructure. This close integration with illumination systems has made VLC attractive in indoor environments, where it offers energy efficiency, access to unregulated bandwidth, and natural coexistence with radio-frequency (RF) technologies. Since its initial standardization in 2011 [1], and through subsequent frameworks such as IEEE 802.15.7-2018 and ITU-T G.9991, VLC has been increasingly regarded as a promising complement to conventional Wireless networks. In this context, it has often been implicitly perceived as a naturally secure medium, largely due to assumptions of the spatial confinement of light. Such assumptions, however, become fragile once realistic architectural layouts, environmental factors, and the presence of adversaries within illuminated spaces are taken into account. An examination of the existing literature shows that early research on VLC security was predominantly theoretical or based on highly simplified simulation models. While a number of countermeasures were proposed, ranging from friendly jamming to the direct adoption of classical cryptographic techniques, these were frequently discussed without a systematic evaluation of physical exposure or an explicit notion of risk severity. Experimental studies were comparatively scarce, and the lack of a shared methodological basis has made cross-comparison of vulnerabilities and attack vectors difficult. Rather than extending this line of abstract analysis, this thesis focuses on the practical feasibility of attacks on VLC systems, with particular emphasis on experimentally grounded, reproducible measurements at the physical layer. The work is structured around two central hypotheses. First, it argues that VLC networks should not be considered inherently secure under realistic deployment and operational conditions (H1). Second, it contends that the risks associated with attacks on VLC systems can be formally characterized and quantitatively assessed by adapting established information security and risk management methodologies to the specific properties of optical wireless communication (H2). To investigate these hypotheses, the thesis examines the extent to which attack models originally developed for related wireless technologies (i.e., WiFi, Bluetooth, or Zigbee) can be meaningfully transferred to VLC environments. Their potential impact is then evaluated using risk analysis frameworks and controlled laboratory measurements. On this basis, the work proposes a structured approach for assessing the security posture of VLC implementations, explicitly linking physical-layer measurements with contextual, architectural, and systemlevel factors. The first scientific article addresses the feasibility of eavesdropping on indoor VLC links from outside a building. Through a combination of simulations and controlled field measurements, it demonstrates that an external adversary can capture a non-negligible amount of optical power, even at intermediate distances and from lateral positions relative to windows. These results challenge the widespread assumption that VLC signals remain naturally confined to illuminated spaces and reveal the significant role of geometry, surface reflectivity, and architectural transparency in shaping leakage paths. Importantly, this work provides experimentally validated evidence of realistic exposure beyond the intended illumination zones. The second article adapts the Risk Matrix methodology to the VLC domain and applies it to a set of twenty representative attacks. These attacks are evaluated and ranked by likelihood and potential impact, resulting in the first structured comparative overview of security exposure in VLC systems. Attacks associated with denial-of-service (DoS) and malicious twin configurations emerge as particularly critical, given their high feasibility and disruptive capacity. Other attacks, while more frequent but less severe, such as opportunistic wardriving, are instead interpreted as enabling conditions that may facilitate escalation toward more serious threats. Taken together, this contribution establishes a formal framework for prioritizing mitigation strategies and situating VLC vulnerabilities within realistic organizational and deployment contexts. The third article introduces a hybrid quantitative method that combines measurablephysical parameters, most notably the signal-to-interference-plus-noise ratio (SINR), with a risk multiplier that accounts for attacker observability, Access conditions, and the use of cryptographic protections. Experimental results show that relatively small variations in geometry, orientation, or material transparency can produce substantial differences in exposure levels. They further indicate that the overall security posture of a VLC system is driven primarily by implementation and deployment choices, rather than by any intrinsic property of the optical channel itself. In this sense, the proposed method refines risk estimation by explicitly linking physical-layer measurements with operational and contextual security considerations. The fourth article, which has been accepted for publication, consolidates the analytical and experimental results developed throughout the thesis into an integrated risk assessment framework for optical wireless networks. The analysis is extended to hybrid configurations that combine radio-frequency and visible light communication and is aligned with emerging standards, including IEEE 802.11bb and IEEE 802.15.7m. By formalizing reproducible evaluation procedures, this contribution establishes a foundation for assessing security across heterogeneous optical deployments, with particular emphasis on interoperability, coexistence, and the implications of mixed-spectrum communication models. Taken as a whole, the results presented in this thesis support both hypotheses and are consistent with the experimental evidence discussed throughout the work. They confirm that visible light communication networks are vulnerable to practical attacks under realistic conditions and therefore cannot be regarded as inherently secure. At the same time, they demonstrate that the associated risks can be systematically characterized and quantified through a combination of qualitative and quantitative methodologies. Beyond these technical findings, the tesis also highlights a disciplinary gap between research primarily focused on attack feasibility and broader socio-technical perspectives concerned with consequences and harm. By integrating risk analysis into the study of physical-layer security, this work contributes to a reproducible and systemic understanding of security in optical wireless communication, bridging engineering-oriented approaches with consequence-based practices in information security. Descripción: Programa de Doctorado en Empresa, Internet y Tecnologías de las Comunicaciones por la Universidad de Las Palmas de Gran Canaria

Los activos objeto de decomiso: aspectos sustantivos y político-criminales

2026-05-12T11:34:15Z

Título: Los activos objeto de decomiso: aspectos sustantivos y político-criminales Autores/as: Cazorla González, Cristina Resumen: El crimen organizado y las organizaciones criminales han encontrado en las dinámicas globalizadoras unas facilidades sin precedentes para desarrollar sus actividades, demostrando una gran capacidad de resiliencia y adaptación. Los beneficios que estas generan son utilizados tanto para la financiación y expansión de sus propias actividades ilegales como para su progresiva infiltración en la economía legal, suponiendo una seria amenaza para la integridad y estabilidad de los sistemas económicos y democracias de muchos países. A través de la presente tesis doctoral pretende ofrecerse un estudio sobre el decomiso, institución clave en la lucha contra este fenómeno. En las últimas décadas, la comunidad internacional y, particularmente, la Unión Europea han impulsado de forma decidida el fortalecimiento de los mecanismos de recuperación de activos, partiendo de la premisa de que la neutralización del incentivo económico constituye un elemento esencial para combatir eficazmente las formas más complejas de criminalidad lucrativa. En el ordenamiento jurídico español, ello se ha traducido en una progresiva ampliación y perfeccionamiento del régimen jurídico del decomiso, especialmente a partir de la reforma introducida por la LO 1/2015. Gracias a dicha reforma, se incorporaron al ordenamiento jurídico español las previsiones contenidas en la Directiva (UE) 2014/42 del Parlamento Europeo y del Consejo, de 3 de abril de 2014, relativa al embargo y al decomiso de los instrumentos y productos del delito en la Unión Europea...; Organised crime and criminal organisations have found unprecedented opportunities to carry out their activity globally, demonstrating oustanding resilience and adaptability. The profits they generate are used both to finance and expand their own illegal activities, and to progressively infiltrate the legal economy, posing a serious threat to the integrity and stability of the economic and democratic systems of many countries. This doctoral thesis aims to provide a study on confiscation, a key institution in the fight against organised crime. In recent decades, the international community and, particularly, the European Union have strongly promoted the strengthening of asset recovery mechanisms, based on the premise that neutralizing the economic incentive constitutes an essential element for effectively combating the most complex forms of profit-driven crime. In the Spanish legal system, this has translated into a progressive expansion and refinement of the legal framework governing confiscation, especially following the reform introduced by Organic Law 1/2015. Thanks to this reform, the provisions contained in Directive (EU) 2014/42 of the European Parliament and of the Council of 3 April 2014 on the freezing and confiscation of instrumentalities and proceeds of crime in the European Union were incorporated into Spanish law... Descripción: Programa de Doctorado en Ciencias Jurídicas y Sociales por la Universidad de Las Palmas de Gran Canaria