Complejo Hospitalario Universitario de Santiago
Repositorio Institucional da Universidade de Santiago de CompostelaNot a member yet
32415 research outputs found
Sort by
Formas específicas de Criminalidade III: apuntes materia G3191421 do 4º curso académico do Grao de Criminoloxía
No full textPolycyclic Aromatic Hydrocarbons (PAHs) containing Biphenylene and Cyclooctatetraene Units
No full textPolycyclic aromatic hydrocarbons (PAHs) are a family of
organic compounds presents around us from oil to interstellar
space, that can be considered as well-defined graphene
fragments. Defective PAHs with non hexagonal rings have
emerge as improved scaffolds due to their ability to modify the
properties of their planar analogous. The synthesis of both
systems generally requires regioselective rings fusions, where
metal-catalysed annulations have become one of the most
attractive strategies.
Throughout this PhD thesis, 1,3- cyclohexadiene nuclei,
presents in dihydrobiphenylenes systems, will be explored
towards annulated systems containing biphenylenes units
through oxidative process. Moreover, synthesis and reactivity of
strained alkynes species (COTynes) for the formation of PAHs
with COT units will also be adressed.2025-03-2
Mathematics for optimal design of sustainable infrastructures
Full text linkThe central aim of this paper is to show that mathematical sciences—in particular a smart combination of modeling, numerical simulation and optimization—can be seen as a useful tool in the design of sustainable infrastructures. Thus, in the first part of this work, we clarify what we mean by systems optimization and suggest how to apply these techniques to improve sustainability. Then, in the second part, we present three interesting environmental problems—all of them involving sustainable infrastructures—that we have studied in the last decade and fit well within this framework: (a) the design of a river fishway to help migratory fish to climb a dam, (b) the design of an irrigation channel to minimize sedimentation and erosion, and (c) the management of an urban road network from an environmental perspective. Based on our experiences, we believe that this innovative use of non-trivial mathematical tools is destined to play a leading role in achieving the United Nations Sustainable Development Goals by helping stakeholders develop the best scientifically informed strategiesOpen Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. Open Access funding was provided by the Universidade de Santiago de Compostela/CISUG thanks to the CRUE/CSIC agreement with Springer Nature. This work was supported by funding from project TED2021-129324B-I00 of the Ministerio de Ciencia e Innovación (Spain) and NextGenerationEU (European Union). Additionally, the support provided by DHI with the modeling system MIKE21 is greatly appreciatedS
Carga de mortalidad atribuida a la exposición al humo ambiental de tabaco en España: estimaciones y aportaciones metodológicas
No full textLa exposición al humo ambiental de tabaco produce enfermedad y muerte.
Los resultados de esta tesis actualizan las estimaciones de mortalidad atribuida a la exposición al humo ambiental de tabaco en España y se presenta, por primera vez, la estimación de la mortalidad atribuida en las 17 Comunidades
Autónomas españolas. Además, se identifican los diferentes estudios que, teniendo en cuenta la prevalencia de
exposición, han estimado el impacto que el humo ambiental de tabaco tiene en la mortalidad.2025-05-1
Victims of child grooming: an evaluation in university students
Full text linkThe appearance of new ways of committing sexual violence via technological media and
virtual spaces has produced countless situations where sexual abuse of minors may occur. This is the
digital scenario surrounding the phenomenon of grooming. The present study focuses on analyzing
grooming experienced by Spanish university students during childhood. The sample comprised
3293 students in higher education, 68.3% of whom were female, 30.5% were male, and 1.2% identified
as non-binary. The mean age was 18.83 years (SD = 2.28). The results confirmed that sexual abuse
of minors has moved towards virtual environments, indicating a prevalence of 12.2% for grooming,
which was more likely to have affected women and non-binary people. In addition, student victims
of grooming were more often also victims of sextortion. Consumption of pornography was also
shown to be particularly important, with the results indicating that students who consumed it and
started consuming it before they were 16 years old were more often victims of grooming. These
findings should encourage the educational community to develop preventive actions that match the
reality of online child sexual abuse. In summary, the only path towards preventing and detecting
grooming is to invest in high-quality digital education and sex education from a gender perspectiveThis research is funded by the “Research Grants from the University of Santiago de
Compostela for the implementation of projects aimed at developing measures of the State Pact
against Gender Violence 2022 and 2023” (Ministry of Equality, Government of Spain)S
Post-treatment of anaerobically digested sewage for nutrient removal
Full text linkAlthough modern anaerobic sewage treatment systems and in particular the upflow anaerobic sludge blanket reactor (UASB) have demonstrated remarkable performance in tropical and subtropical regions, the effluent quality is generally not compatible with discharge standards in many countries, so post-treatment becomes necessary. In practice, the most widely applied post-treatment options are polishing ponds (PPs) and other aerobic treatment bioreactors. PPs are treatment units treating anaerobically pre-treated wastewater, which distinguishes them from conventional waste treatment ponds, wherein normally raw wastewater is treated. Anaerobic pre-treatment has a very profound influence on the configuration and operation of PPs, as will be shown in this chapter. Other aerobic post-treatments can be realized with conventional activated sludge systems, or more complex technological solutions including membrane bioreactors (MBRs) or trickling filters. The anaerobic–aerobic treatment has important advantages compared to the purely aerobic treatment: the volume and sludge production is much smaller, there is a possibility that the anaerobic–aerobic system operates with energetic self-sufficiency and the concentration of excess sludge is much higher facilitating its processing. An important problem of anaerobic–aerobic treatment is the difficulty of producing a final effluent with low nutrient concentration. Anaerobic sewage treatment reduces the content of biodegradable organic matter in the effluent, limiting in practice the removal of phosphorus to the use of chemical precipitation systems. For the case of nitrogen, the alternatives only go through new processes, which complement the poor capacity of conventional denitrification due to the limited concentration of biodegradable organic matter. This limits in practice, the nitrogen elimination capacity of activated sludge systems or trickling f ilters treating effluents from UASB reactors. A notable breakthrough could occur if reliable partial nitrification anammox processes for the water line were developed, as these are still under development, or systems in which the dissolved methane present in the anaerobic effluents was used to denitrify, as it has already been observed in some MBRs
Instrucción 1/2024 de la Secretaría General de la USC sobre la organización del espacio de trabajo en intranet de las unidades administrativas y la creación de archivos digitales de oficina.
No full textA irrupción da Administración Electrónica na actividade administrativa e de xestión da Universidade de Santiago de Compostela (USC) trouxo aparellado un importante cambio na forma de traballar, nos medios e recursos de tramitación e na maneira de conformar, arquivar e preservar as evidencias documentais que testemuñan o importante servizo público que presta a USC á comunidade universitaria e á sociedade en xeral.
De igual modo, é importante subliñar que a documentación electrónica que se está a crear nos distintos servizos e unidades administrativas é de vital importancia tanto desde un punto de vista xurídico -por dar soporte e valor probatorio aos dereitos e deberes das persoas administradas e do propio persoal da USC- como pola súa consideración legal de patrimonio documental desde o mesmo momento da súa creación.
Tomando en consideración estas premisas e valorando a problemática subxacente á tramitación electrónica e os riscos que contempla, faise necesario normalizar a organización da documentación electrónica, a conformación de expedientes dixitais e o seu arquivado nas unidades ou servizos
Harnessing ligand design to develop primary and self-calibrated luminescent thermometers with field-induced single ion magnet behaviour in Dy3+ complexes
Full text linkNovel complexes {[Dy(LN6en)(OAc)2](NO3)}·2H2O (1·2H2O) and {[Dy(LN6prop)(OAc)2](NO3)}·CHCl3 (2·CHCl3), containing partially flexible symmetric N6 macrocycles, are reported. We explore the influence of the spacer length between two symmetrical N3 rigid moieties of the ligand on their structural, magnetic, and luminescence properties. Crystallographic analysis reveals the presence of Dy3+ ions in distorted tetradecahedral (1·2H2O) or bicapped square antiprism (2·CHCl3) environments. This underscores the increased flexibility of the LN6prop ligand, resulting in greater distortion of the N6 macrocycle plane. Both complexes exhibit single-molecule magnet behaviour under an optimal field of 2000 Oe, with 2·CHCl3 displaying the highest Ueff value of 127 K, despite its less planar N6 macrocycle. Luminescence measurements indicate that the ratio between the integrated intensity of the ligands and that of the the Dy3+ 4F9/2 → 6H13/2 transition can define secondary luminescent thermometers. Maximum relative thermal sensitivity values of 2.3 (1·2H2O) and 5.1% K−1 (2·CHCl3) are achieved. Furthermore, deconvolution of the 4F9/2 → 6H15/2 transition in 2·CHCl3 supports the previous determination of the energy barrier for magnetic relaxation. This permits the demonstration of the first example of a Dy3+ primary luminescent thermometer based on two thermally coupled Kramer's doublets of the 4F9/2 level. Remarkably, 2·CHCl3 is also the first self-calibrated luminescent thermometer with magnetic relaxation operating within the 86–211 K range, showcasing its potential in precise temperature sensing applicationsThis work was developed within the scope of the project
CICECO – Aveiro Institute of Materials, UIDB/50011/2020,
UIDP/50011/2020, and LA/P/0006/2020, financed by national
funds through the FCT/MCTES (PIDDAC). This article is also
based upon work from COST Action CA22131, supported by
COST (European Cooperation in Science and Technology). The
authors acknowledge fruitful discussions with Dr Alban
N. Carneiro Neto (University of Aveiro) concerning ligand-tometal energy transfer. J. C. V. also thanks Xunta de Galicia for
his postdoctoral fellowship (ED481B-2022-068)S
¿Botas en verano frente a sandalias en invierno? El dilema que hace que eliminar el cambio de hora sea complicado
Full text linkThis version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: http://dx.doi.org/10.1007/s00508-024-02322-8A short take on the pros and cons associated with daylight saving time2024-07-26S