Browsing by Issue Date, starting with "2020-06"
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- Gerações jovens nas organizações : os 17 objetivos de desenvolvimento sustentável como estratégia de retenção, motivação e compromissoPublication . Monteiro, Bárbara Gameiro de Andrade Vicente; Gomes, JorgeO objetivo principal do presente estudo é perceber o impacto que o desenvolvimento dos 17 SDGs nas organizações tem nos colaboradores mais jovens, e em que medida poderá esta ferramenta auxiliar a GRH na difícil tarefa de retenção desses mesmos trabalhadores. Face ao exposto, e com suporte na literatura existente sobre os diversos temas que se interligam com o compromisso e a responsabilidade social, procurou-se verificar se a temática pode servir como ferramenta de estratégia de retenção para a GRH. Para tal, foi usada uma amostra de 252 pessoas das diversas gerações que trabalham em Portugal. Através do SPSS (versão 26), foram estudadas as hipóteses, fundamentadas na literatura. Este estudo permitiu concluir que os portugueses têm uma clara perceção das grandes questões ambientais, nomeadamente a da urgência na adoção de medidas de abrandamento dos efeitos do Aquecimento Global. Permitiu ainda concluir que alguns estereótipos geracionais não se verificam em Portugal, nomeadamente as gerações mais velhas terem uma menor inquietação relativamente ao Aquecimento Global. Finalmente, foi possível perceber que os 17 SDGs têm de facto um impacto positivo no compromisso dos colaboradores portugueses de todas as gerações e não apenas nas mais jovens.
- A importância da formação inicial e contínua nos vigilantes da segurança privadaPublication . Pombo, Ana Catarina Neto; Gomes, Jorge; Martins, JorgePotenciar a capacidade e qualidade dos recursos humanos tornou-se numa das grandes preocupações para as organizações dos dias de hoje, por acreditarem que pode vir a ser uma fonte de vantagem competitiva. Ao mesmo tempo, os recursos humanos têm vindo a optar cada vez mais por organizações que apostam na sua formação e desenvolvimento profissional. Sentir que estão a investir e desencadear o seu crescimento fá-los acreditar que são parte integrante da mesma. Este Relatório de Estágio, que serve como Trabalho Final de Mestrado, pretende expor quais as atividades desenvolvidas ao longo do estágio curricular realizado no Departamento de Recursos Humanos e focado na Gestão de Pessoas da Securitas Portugal. O presente estudo recaiu no acompanhamento do processo de Formação dos vigilantes da Securitas Portugal, apesar da oportunidade de conhecer e participar noutras atividades da organização, como a Avaliação de Desempenho. Propôs-se uma revisão de literatura com base nas atividades desenvolvidas ao longo do estágio, com o intuito de abordar como é preparado o processo de Formação, desde a identificação de necessidades de formação, ao seu desenho, até à fase de avaliação. Refletir sobre quais os métodos de Formação que melhor se aplicam, perante a existência de uma vasta panóplia de possibilidades pode ser um processo moroso, mas, como analisado ao longo do estágio, de extrema importância.
- Unveiling the hidden interaction between thermophiles and plant crops: wheat and soil thermophilic bacteriaPublication . Santana, Margarida; Carvalho, Luis; Melo, Juliana; Araújo, Maria Eduarda; Cruz, CristinaThe effect of a soil thermophilic bacteria (STB), Ureibacillus sp. 18UE/10 on the status of wheat plants was evaluated. A greenhouse assay was performed, mimicking scenarios of soil impoverishment and aridity, which included Rhizophagus irregularis, a crop enhancer AMF, for effect comparison. Treatments with strain 18, R. irregularis or both had no significant effect on biomass production, however affected plant physiology. A different partition in biomass, nitrogen and carbon content were observed, resulting in a decreased C/N ratio. Elemental analysis showed an increase in N and P content in shoots, and for treatments containing STB a decrease in the content of several toxic metals. Strain 18 had a distinct δ13C isotopic signature translating an increased stomatal conductance. ATR-IR spectroscopy revealed that root exudate influenced STB cell wall structure and increased the bacterial survival rate at 25°C. These findings show that STB can interact with a plant partner under rhizospheric conditions.
- Research and Development of a General Purpose Instrument DAQ-Monitoring Platform applied to the CLOUD/CERN experimentPublication . Dias, António Miguel da Cruz Baptista; Barbosa, António Joaquim Rosa Amorim; Tomé, António RodriguesThe current scientific environment has experimentalists and system administrators allocating large amounts of time for data access, parsing and gathering as well as instrument management. This is a growing challenge since there is an increasing number of large collaborations with significant amount of instrument resources, remote instrumentation sites and continuously improved and upgraded scientific instruments. DAQBroker is a new software designed to monitor networks of scientific instruments while also providing simple data access methods for any user. Data can be stored in one or several local or remote databases running on any of the most popular relational databases (MySQL, PostgreSQL, Oracle). It also provides the necessary tools for creating and editing the metadata associated with different instruments, perform data manipulation and generate events based on instrument measurements, regardless of the user’s know-how of individual instruments. Time series stored in a DAQBroker database also benefit from several statistical methods for time series classification, comparison and event detection as well as multivariate time series analysis methods to determine the most statistically relevant time series, rank the most influential time series and also determine the periods of most activity during specific experimental periods. This thesis presents the architecture behind the framework, assesses the performance under controlled conditions and presents a use-case under the CLOUD experiment at CERN, Switzerland. The univariate and multivariate time series statistical methods applied to this framework are also studied.
- “Constelacional, Portátil y Componible. El proceso creativo de Juan Fernando de Laiglesia, de la teoría a la praxis –y viceversa-”Publication . Fuentes Cid, Sara; Cortizas, OlallaEste artículo tiene por objeto explorar las claves que atraviesan la obra plástica de Juan Fernando de Laiglesia (Madrid, 1946). Partiremos del análisis de las convergencias formales y conceptuales entre algunas de sus obras más recientes para llegar a caracterizar el universo de este autor. Profundizaremos también en su proceso de trabajo, íntimamente ligado a la reflexión conceptual. Veremos como su particular modo de hacer se ha traducido en un particular modo de dedicarse a la construcción de pensamiento desde y para el Arte.
- Using a space-for-time approach to select the best biodiversity-based indicators to assess the effects of aridity on Mediterranean drylandsPublication . Frasconi Wendt, Clara; Nunes, Alice; Verble, Robin; Santini, Giacomo; Boieiro, Mário; Branquinho, CristinaMediterranean drylands are particularly vulnerable to predicted increases in aridity which are expected to have negative consequences for biodiversity. To understand the effects of climate change on ecosystems, a framework for the selection of indicators based on the essential biodiversity variables (EBV) was proposed. In this framework, a functional approach has been suggested because functional traits have shown to be sensitive to small-scale environmental changes. Additionally, functional traits are also associated with ecosystem-limiting processes. In this context, we used ants as ecological indicators, as they are functionally important and respond in a measurable way to environmental changes. We identify which biodiversity-based indicators (e.g., taxonomic, single-trait and multi-trait indices) help track changes in Mediterranean drylands; for this, we used a space-for-time substitution climatic gradient in the western Mediterranean. Ants were sampled along an aridity gradient and identified to species level. Four continuous and seven categorical traits were measured or retrieved from literature. Continuous traits included Weber’s length, which is indicative for body length, head length, eye length and femur length; categorical traits were diet, behavioral dominance, daily activity, nest preference, mound presence, worker polymorphism and foraging strategy. We calculated taxonomic, functional structure and single- and multi-trait functional diversity indices and correlated them with aridity. We found that ant taxonomic and multi-trait functional diversity were maintained along the aridity gradient. Despite maintenance of species and functional diversity along the gradient, ant functional structure responded to aridity with increases in mean trait values of Weber’s length, eye length and femur length in the drier part of the gradient. Under wetter conditions, we found the highest proportion of ants with a seed-based diet, reflecting a potential increase in resource quantity. We observed a change in foraging strategy from group to individual as aridity increased. In conclusion, with a space-for-time substitution climatic gradient, this study shows the potential role of aridity as an environmental driver of ant trait values. These results highlight the value of ants and functional traits as indicators to track the effects of climate change on ecosystems. Finally, this study represents a starting point to monitor important species traits in the context of EBV and to use them as indicators to track the effects of aridity on Mediterranean dryland ecosystems.
- From species presences to abundances: Using unevenly collected plant species presences to disclose the structure and functioning of a dryland ecosystemPublication . Pereira de Oliveira, Ana Cláudia; Nunes, Alice; Pinho, Pedro; Matos, Paula; Garcia Rodrigues, Renato; Branquinho, CristinaSpecies abundance data is essential to understand ecosystems structure and functioning and to support species and habitat conservation. However, most regional to global databases provide only presence or presence/absence data. The main aim of this paper is to develop a methodology to estimate plant species abundances from a presence/absence database using as a case-study the largest and one of the most diverse tropical dry forest of the world – the understudied Caatinga vegetation, that dominates in the drylands of Brazil. Plant data missed abundance estimations and derived from different sources, with uneven sampling efforts over space and time. Starting from the raw data, we considered only the presence records of terrestrial plant individuals identified to the species-level. Afterwards, we applied the re-sampling method to estimate species abundances thus obtaining database DB1. To deal with the uneven sampling effort along the study area and increase information reliability, we filtered DB1 in two ways: (i) we excluded re-sampling units with a lower sampling effort and produced the Database DB2; (ii) we excluded low occurrence species and build the Database DB3. The reliability of the databases was compared by calculating a measure of their completeness. DB1 had 789 species over 323 sampling units, DB2 retained 530 species distributed in 38 sampling units, and DB3 retained 48 species over 113 sampling units. In DB1 and DB2, despite the different number of species considered, the percentage of exotic (7%), endemism (14%), woody (44%), climber (12%), and herbaceous species (45%) was similar. DB3 included only native species (no exotic species) and displayed a higher percentage of endemism (29%) and woody species (79%), and a lower proportion of herbaceous species (21%) than DB1 and DB2. The databases obtained provide an important basis to improve Caatinga ecological knowledge and conservation: we suggest the use of DB2 to support conservation strategies, and of DB3 to support ecosystem structure and functioning studies. Moreover, the re-sampling methodology proposed to estimate plant abundances from presence data, dealing with uneven sampling efforts across large areas and over time, provides an important tool that may be used to obtain abundance data, often essential to the development of plant-based indicators of ecosystem structure and functioning, and to support conservation studies.
- Avaliação do impacto da pandemia de Covid-19 sobre o setor da comunicação social em PortugalPublication . Martins, Carla; Esteves, Ana Teresa; Corrêa, Luís
- Time inhomogeneous multivariate Markov chains : detecting and testing multiple structural breaks occurring at unknownPublication . Damásio, Bruno; Nicolau, JoãoMarkov chains models are used in several applications and different areas of study. Usually a Markov chain model is assumed to be homogeneous in the sense that the transition probabilities are time invariant. Yet, ignoring the inhomogeneous nature of a stochastic process by disregarding the presence of structural breaks can lead to misleading conclusions. Several methodologies are currently proposed for detecting structural breaks in a Markov chain, however, these methods have some limitations, namely they can only test directly for the presence of a single structural break. This paper proposes a new methodology for detecting and testing the presence multiple structural breaks in a Markov chain occurring at unknown dates.
- Os millennials e o trabalho : exploração das relações entre horas extraordinárias, autoeficácia, envolvimento e desempenho no trabalhoPublication . Ribeiro, Leonor Nunes Homem de Freitas; Gomes, JorgeRecentes crises económicas, mudanças contínuas no mundo laboral e diferentes gerações profissionais têm vindo a desafiar as organizações modernas. Desta forma, com a presente investigação pretendemos estudar a geração Millennial e o trabalho. Iremos assim, explorar a relação entre as horas extraordinárias no trabalho, o envolvimento, o desempenho no trabalho e a autoeficácia destes trabalhadores. O estudo assenta numa metodologia quantitativa, com base na elaboração de um questionário. A amostra deste estudo foi eleita de forma não probabilística intencional e "bola de neve", resultando num total de 136 inquiridos. Para estudar os resultados obtidos, recorreu-se a Baron e Kenny (1986), assim como ao coeficiente de correlação de Pearson e testes de mediação e moderação de Hayes. Por um lado, foi possível confirmar existir uma relação positiva entre a autoeficácia e o envolvimento, bem como entre o envolvimento e o desempenho no trabalho. Por outro lado, foi possível comprovar que a relação entre autoeficácia e desempenho no trabalho é parcialmente mediada pelo envolvimento. Contudo, as horas extraordinárias no trabalho são não moderadoras na relação entre o envolvimento e o desempenho no trabalho.