Lepton flavor violation in SUSY left-right symmetric theories

The seesaw mechanism is the most popular explanation for the smallness of neutrino masses. However, its high scale makes direct tests impossible and only indirect signals at low energies are reachable for collider experiments. One of these indirect links with the high scale is lepton flavor violation (LFV). We discuss LFV decays of sleptons in the context of a SUSY left-right symmetric model that naturally incorporates the seesaw mechanism. This non-minimal embedding of the seesaw leads to observable LFV effects in the right-handed sleptons sector, contrary to minimal models where these are found to be totally negligible. Therefore, LFV observables can be used as a powerful tool to study physics right below the GUT scale.Comment: To appear in the proceedings of PASCOS 2010, the 16th International Symposium on Particles, Strings and Cosmology, Valencia, Spai

Polymer based nanocomposites: synthetic strategies for hybrid materials

Associating the well known advantages of hybrid materials to the wide potential of nanomaterials, the new and featuring class of polymer nanocomposites turned into one of the most intensively researched areas. This review highlights recent developments in the field of the synthesis of polymer based nanocomposites. Important issues related to the surface modification of fillers, in order to promote the compatibility between the inorganic/organic components, are also reported. The enhancement of the physical properties and the potential applications of polymer nanocomposites are considered in typical examples, given for each synthetic method describe

Modelling long-term morphodynamics in practice: uncertainties and compromises

Two problems limit the ability of morphological models to reproduce the real-world behaviour of geomorphological systems: (a) the dominance of short-term observations which fail to capture the full character of morphological evolution and cannot quantify fully the primary phenomena and mechanisms of change; and (b) incomplete understanding of processes at all relevant scales. Present efforts to reduce uncertainty in morphological models assume that: (a) observations are the key to locate, quantify and reduce uncertainty; and (b) means used to quantify, minimise and control uncertainty will improve model performance. This paper first outlines the principles underpinning morphological model development concerning coastal sandy environments. Then it discusses the use of morphological models and considers approaches that improve predictions through reduced uncertainty. The discussion is supported by two examples that illustrate the compromises that must be reached between what a morphological model is required to predict and what the model can deliver in practice

Is it more than employability?: Revisiting employers’ perception of graduates’ attributes

Higher education is confronted with two broad missions, either prepare graduates for the world of work, or prepare well-rounded students that combine broad-spectrum qualities of citizenship, responsibility, and professional expertise. The employability skills have been widely studied, while the attributes related to holistic education are still scarcely investigated. This paper examines the skills and other attributes that employers seek when hiring graduates. It confronts the perceptions of employers regarding the skills associated with employability and the abilities and characteristics linked to holistic education. This is an exploratory research based on original and qualitative data collected in 2020 through interviews with employers (n=8) from different sectors in Portugal. Empirical findings indicate that all employers prioritise employability skills, such as communication, teamwork, and learning abilities. We found more dispersion regarding the attributes of holistic education and a large consensus was found for interdisciplinarity, self-reflection, and personal and social responsibility. The data show that the attributes that help to address society’s problems and challenges still seem to be regarded as quite irrelevant in the recruitment process.info:eu-repo/semantics/publishedVersio

Aplasias Medulares Congénitas

Las aplasias medulares congénitas constituyen un grupo heterogéneo de enfermedades que se caracterizan por insuficiencia medular, asociadas frecuentemente a una o más anomalías somáticas y con riesgo elevado de neoplasias.Son enfermedades raras, generalmente diagnosticadas en la edad pediátrica, y con una mortalidad prematura importante. Los autores presentan 11 casos de aplasia medular congénita,8 deanemia de Fanconiy 3 de disqueratosis congénita. Estos casos fueron diagnosticados en los últimos 14anõs en el Hospital de Dona Estefânia

Intensificação da bovinocultura de corte: estratégias de manejo reprodutivo e sanitário.

Manejo reprodutivo em gado de corte; Sincronizacao do estro em bovinos; Manejo sanitario em sistemas intensivos de producao de carne; Novos metodos de avaliacao da capacidade reprodutiva de touros.bitstream/CPPSE/12479/1/PROCIDoc26RTB636.0824LV.pd

Tingimento com novos corantes sulfurosos: Contribuição para uma tecnologia mais limpa

Os corantes sulfurosos constituem um exemplo dos problemas encontrados no sector têxtil. Os processos com este tipo de corante apresentam um elevado teor em sulfuretos e carga poluente. Associadas a estes salientam-se as dificuldades na quantificação de corante rejeitado. Nesta comunicação, pretende-se apresentar um contributo à alteração da situação exposta, quer pela substituição dos corantes tradicionais por corantes sulfurosos pré-reduzidos, com baixo teor em sulfuretos e sua quantificação, quer pela aplicação do tingimento com redução electroquímica indirecta

Application of cyclic voltammetric technique on dye concentration control in aqueous solutions

This communication follows a previous work concerning indirect electrochemical reduction of dyes [1] and its application on dyeing control with sulphur dyes. The study concerns the cathodic peak intensity variation with sulphur dye C.I. Leuco Sulphur Black 1 (Black Diresul RDT liq.) concentration, in the presence of a mediator, iron/triethanolamine (FeIII/TEA), in alkaline media

Aplicação da técnica de voltametria cíclica na selecção de material de eléctrodo para o sistema mediador FeIII/TEA

Enquadrada num trabalho mais amplo sobre a redução electroquímica indirecta de corantes, a presente comunicação teve, como objectivo, a selecção de um material de eléctrodo adequado ao complexo de ferro e trietanolamina (FeIII/TEA), em meio básico, usado como mediador redox. A análise dos resultados experimentais e dos voltamogramas obtidos permitiu concluir que, dos diferentes materiais testados (aço, ferro e cobre), o cobre parece ser o que permite uma transferência electrónica de maior reversibilidade

Sulphur dyes: a contribution to a new approach on the quantitative determination

An important problem with sulphur dyes application concerns his quantitative determination during dyeing process. Spectrophotometry methods are the most applied ones, although not always the most suitable for this kind of products. In this paper, we will present an approach to a new way to sulphur dye concentration control, based in a potentiometric determination