Produção de refeições e alterações nutricionais nos alimentos

Durante a produção de refeições, o conteúdo nutricional dos alimentos pode decrescer devido à alteraçãoou degradação química dos nutrientes, ou devido à solubilização e drenagem dos nutrientes dos alimentos para o meio de confecção. Por outro lado, o processamento altera a matriz do alimento original,promovendo o aumento da biodisponibilidade de alguns nutrientes e fitoquímicos. Uma correcta compreensão destes dois fenómenos contribuirá para uma melhor estimativa de ingestão de nutrientes e do estado nutricional do indivíduo e das populações. Numa outra perspectiva, o desenho de formulaçõesalimentares, de refeições e de ementas, poderá ser aperfeiçoado se for considerado o impacto do processamento no conteúdo nutricional.During meal production the nutritional content of food products can decrease due to chemical degradation of nutrients or due to solubilization and draining of nutrients from food to the cooking media. On the other hand, processing alters the food matrix, promoting the increase of the bioavailability of some nutrients and phytochemicals. The correct comprehension of these two aspects will contribute to a better estimate of nutritional intake and nutritional status of the individual and populations. In another perspective, the design of food products, meals, and menus can be improved if taken into consideration the impact of processing on nutritional content

A waste collection case study

Mestrado Bolonha em Data Analytics for BusinessInnovative waste collection strategies have been established to replace conventional systems with dynamic systems that respond to the actual fill-level of waste containers. This work proposes a method for route design involved in the waste collection, focusing on minimizing the total distance travelled, for a case study of the Portuguese municipality of Caldas da Rainha. The process uses historical data of the filling percentage of each container to determine the number of weekly collections required per container to determine the number of weekly collections required per container and therefore create collection routes. More conventional approaches are based on a single average fill-up rate common to all containers, which may not represent the reality and therefore lead to inefficiencies. By analysing the available data, is concluded that all containers only require one weekly collection. A data clustering algorithm is then applied to aggregate container in groups corresponding to the same route, based on proximity. Then, routes are designed within each cluster. Finally, the selection of pairs of routes for the same day is done through a matching problem. Data limitations lie on the manual introduction of containers’ fill level and on most historical data being from the pandemic. The established methodology is applied to the glass waste collection and transportation system of Valorsul S.A. The present project aims at proposing a method for waste collection planning and explores critical considerations and future improvements based on the difficulties faced.info:eu-repo/semantics/publishedVersio

Information retrieval for children based on the aggregated search paradigm

This report presents research to develop information services for children by expanding and adapting current Information retrieval technologies according to the search characteristics and needs of children. Concretely, we will employ the aggregated search paradigm as theoretical framework. The objective is to develop approaches that identify the most appropriate information types and sources given a child's information request and to present this information to ease and improve his/her search experience

How authentic leadership promotes individual creativity: The mediating role of affective commitment

This study sought to provide a more comprehensive understanding of how authentic leadership can affect employees’ individual creativity through affective commitment’s mediating role. The sample included 177 leader-follower dyads from 26 private, small and medium-sized enterprises. Followers reported their levels of affective commitment and perceptions of authentic leadership, and leaders assessed each follower’s level of creativity. The results show that authentic leadership has a positive impact on affective commitment and creativity. Moreover, affective commitment fully mediates the relationship between perceived authentic leadership and individual creativity. Organizations can thus increase employees’ affective commitment and creativity by encouraging their managers to adopt more authentic leadership styles. Additional studies with larger samples are needed to determine more clearly not only authentic leadership’s influence on individual creativity but also other psychosocial and personal variables’ effects on that relationship.info:eu-repo/semantics/publishedVersio

Spectral stability of Markov systems

For a class of semigroups of stochastic dynamical systems, $x\mapsto P_x$, where $x$ denotes a state and $P_x$ the state probability transition, we relate its spectral stability with the combinatorial stability of the underlying non-deterministic dynamics, associated to the point-set map $x\mapsto \text{ supp}(P_x)$

Combinatorial stability of non-deterministic systems

We introduce and study, from a combinatorial-topological viewpoint, some semigroups of continuous non-deterministic dynamical systems. Combinatorial stability, i.e. the persistence of the combinatorics of the attractors, is characterized and its genericity established. Some implications on topological (deterministic) dynamics are drawn

La bioprospección como un mecanismo de cooperación internacional para fortalecimiento de capacidades en ciencia y tecnología en Colombia

Bioprospecting, defined as the exploration of biodiversitytargeted for commercial purposes, has recently become a potential strategy whereby biodiversity-rich countries can enhance their endogenous capacities to perform S&T activities, especially by interacting with more technologically developed countries. Therefore, this work focuses on analyzing the mechanism of international cooperation of a megadiverse country, as Colombia, through analysis of 342 jointly authored articles published in journals indexed in ISI and SCOPUS, information that is complemented by 12 interviews of Colombian group leaders. Results thereof evidence that Spain is the country with the highest cooperation level with Colombia. Cooperation with American countries is considered as a third priority and is intensifi ed with the participation of a European country. The poor cooperation among Colombian groups creates a disperse research agenda on widely varied topics lacking orientation and strategic priorities

Isospectral reduction in infinite graphs

L. A. Bunimovich and B. Z. Webb developed a theory for transforming a finite weighted graph while preserving its spectrum, referred as isospectral reduction theory. In this work we extend this theory to a class of operators on Banach spaces that include Markov type operators. We apply this theory to infinite countable weighted graphs admitting a finite structural set to calculate the stationary measures of a family of countable Markov chains.PD was supported by “Fundação para a Ciência e a Tecnologia” through the Project UID/MAT/04561/2013. MJT was partially supported by the Research Centre of Mathematics of the University of Minho with the Portuguese Funds from the “Fundação para a Ciência e a Tecnologia”, through the Project UID/MAT/00013/2013