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The effects of AI on students´ educational process
No full textDissertation presented as the partial requirement for obtaining a Master's degree in Information Management, specialization in Information Systems and Technologies ManagementArtificial intelligence now touches the lives of millions through its integration into various everyday tasks. One of the fields that has been actively exploring AI-driven tools is education, offering advantages ranging from personalized systems to improved access to resources. In this study we try to understand the value added that AI-driven tools bring to students’ educational approaches, testing their performance and intention to recommend. For this purpose, our innovative theoretical model was tested in a quantitative study using structural equation modelling (SEM), from students or recent graduates with different backgrounds and ages. This study contributes to knowledge and investigation, revealing that constructs like user performance, perceived AI helpfulness and satisfaction play a significant role in their intention to recommend AI-driven tools. Therefore, it contributes to not only to teachers and students, but also to companies that deal with the marketing and software solutions used in universities
Product returns in fashion e-commerce
No full textProject Work presented as the partial requirement for obtaining a Master's degree in Data Driven Marketing, specialization in Marketing IntelligenceProduct returns are a significant challenge in e-commerce, particularly for online fashion retailers, where return rates can range from 30% to over 50% for some product categories. Such high values can result in increased costs, reduced profit margins, and sustainability concerns for retail businesses. Unlike brick-and-mortar retail, however, the main issues contributing to increased e-commerce fashion returns are that customers cannot properly assess products online from images and descriptions and are not able to try merchandise before they buy. This document details a case study of a multi-national European fashion e-tailer and analyses its transactional data to determine the specific factors influencing the return rates. If an item is returned by a customer and put back into inventory for resale, it was calculated from operational data that each return decreases product profitability by 33%. Based on feedback from managerial interviews and customer surveys, as well as reviewing of the latest industry trends and research literature, recommendations are proposed to mitigate the effect of high returns in terms of improving profitability and decreasing environmental impact. Nevertheless, returns will remain an inevitable part of online fashion for the foreseeable future – as such, the case study also throws up several areas for further research in the subject of returns management
The impact of ESG measures on credit ratings: Does it affect creditworthiness?
No full textDissertation presented as the partial requirement for obtaining a Master's degree in Statistics and Information Management, specialization in Risk Analysis and ManagementNowadays, sustainability has been a recurrent theme and is increasingly becoming a concern for several activity sectors. Financial institutions and banks are not an exception, and they have been taking some measures to reduce environmental and climate risks. However, environmental factors are not the only ones to consider. Social and governmental measures must also be considered when talking about sustainable disclosure. At this point, the ESG emerges as an analysis framework to help measure and qualify the degree to which an organization is operating in a sustainable way. The main aim of this dissertation is to gain a broader perspective on how companies, banks, credit rating agencies and financial institutions are dealing with ESG measures, how they are integrating them into decision-making processes and to understand the impact of ESG measures on credit ratings, and consequently, the impact on debtor’s creditworthiness. This is achieved using the ordered logistic regression model, which is applied to a dataset of public companies in which the country of headquarters is located in Europe. The main conclusions of this research confirm that the relationship between ESG performance and credit ratings exists and is positive, however, for the dataset used, the Social Score is the one that represents a statistically significant effect on credit ratings. It can be added that, even for companies that are geographically close to one another and share a common economic, political, and social environment, the relationship between ESG performance and credit ratings can be complex
O Comércio Transatlântico Português de Escravos entre a 2ª Metade do Séc. XVIII e o Início do Séc. XIX
No full textO presente trabalho é uma Dissertação, integrada no Mestrado em História do Império Português. Partimos para avaliar o verdadeiro papel da participação portuguesa no tráfico negreiro durante a segunda metade do séc. XVIII e início do Séc. XIX, recorrendo aos dados da base de dados Slavevoyages. Os dados confirmam
desembarques oscilantes sob bandeira portuguesa, mas praticamente sempre abaixo dos britânicos. Constata-se que o tráfico transatlântico de escravos para o Novo Mundo foi iniciado pelos castelhanos, vendo-se os portugueses inicialmente envolvidos devido aos termos do Tratado de Tordesilhas, que vedavam aos espanhóis o acesso à maior parte da costa africana. Os dados demonstram que as Companhias pombalinas não conduziram a um aumento significativo das importações brasileiras, mas que provavelmente terão
afectado alguns importadores, chegando a representar na década de 1770, 31 por cento dos desembarques totais na América Portuguesa. As viagens sob bandeira portuguesa apresentam as taxas de mortalidade mais baixas entre as das nações envolvidas no trato, o que se deverá à Lei das Arqueações de D. Pedro II, de 1684, mais tarde emulada pelo Dolben Act britânico de 1788. Globalmente, a influência dos preceitos da igreja católica terá contribuído para criar um travão moral contra a crueldade dos homens. Durante a
vigência do regime da escravatura, muitas foram as vozes éticas que a criticaram, incluindo a do padre Manuel Ribeiro da Rocha que, numa obra publicada em 1758, recomenda que os escravos sejam libertados após certo número de anos de serviço com os cômodos necessários a uma nova vida, como preceituado no Deuteronómio. Em Portugal, o Alvará régio de 19 de setembro de 1761, que proíbe a importação de
escravos, e o de 16 de janeiro de 1773, criam condições para uma abolição efetiva da escravatura em Portugal no prazo de uma vida. A análise da historiografia evidencia, na nossa opinião, uma verdadeira intencionalidade de extinguir a escravatura no Reino, por razões óbvias de bom senso, e também por inspiração iluminista e cristã.This is a dissertation on the Portuguese Transatlantic Slave Trade during the second half of the XVIIIth Century and early XIXth Century. Our purpose is to ascertain the real impact of the Portuguese slave trade, using the information published online by the Slavevoyages website. The data confirm fluctuating disembarkation numbers, but generally significantly below British ones. The historiography demonstrates that it was
not the Portuguese, but the Castilians, who inaugurated the transatlantic slave trade to land slaves in the New World. Later, in the first quarter of the XVth Century, the Portuguese got involved, because, under terms of the Treaty of Tordesillas, the Castilians could not trade on most of the African coastline. During the 1750’s decade,
the Portuguese government instituted two monopoly companies to land slaves in certain regions of Brazil. Disembarkation levels did not increase significantly, while some private importers were probably displaced. Casualty rates during the slaving voyages under Portuguese flag were always the lowest, due most probably to the effects of a 1684 Law to regulate slave transport conditions signed by King D. Pedro II, which
would later be emulated by the British 1788 Dolben Act. Although Portugal was not on the forefront of the modern abolitionist movements, we can believe the Catholic Church played a favourable role refraining excesses of cruelty, at least when government officials had a say in the matter. Father Manuel Ribeiro da Rocha published in 1758 a book, where, basing himself on the Deuteronomy-stipulated concepts, he advocated
slave manumission following a certain number of years of labour. During his reign, King D. José I promulgated in 1761 a Law, an Alvará Régio, banning slave imports into Portugal. In 1773, another Alvará Régio stipulated a massive immediate slave emancipation in the homeland, while setting norms directed to full extinction of slavery
there over a lifetime
A adaptação razoável do posto de trabalho e a tutela laboral na doença e na deficiência
No full textThis dissertation focuses on the reasonable accommodation in the workplace within the
framework of employment in illness and disability. It intends to reflect on how Portuguese
employment legislation and equality and non-discrimination law could provide adequate
labour protection to employees with disabilities or illnesses, namely through reasonable
accommodation in the workplace, to comply with Convention on the Rights of Persons
with Disabilities (here after CRPD) and European Union (here after EU) nondiscrimination law.Cette dissertation s’agit de l'aménagement raisonnable du lieu de travail au cadre de la
protection du travail en cas de maladie et de handicap. Elle se concerne à la manière
dont la législation portugaise du travail et les règles d'égalité et de non-discrimination
pourraient offrir une protection adéquate aux travailleurs handicapés ou malades,
notamment par l'aménagement raisonnable du lieu de travail, afin de se conformer à la
Convention relative aux droits des personnes handicapées (ci-après "CDPH") et à la
législation anti-discrimination de l'Union européenne (ci-après "UE").Esta dissertação versa sobre a adaptação razoável do posto de trabalho no quadro da tutela
laboral na doença e na deficiência. Procura-se refletir sobre a forma como a legislação
laboral portuguesa e as normas sobre igualdade e não discriminação poderiam
proporcionar proteção laboral adequada aos trabalhadores com deficiência ou doença,
nomeadamente através da adaptação razoável do posto de trabalho, de modo a cumprirem
com o disposto na Convenção dos Direitos das Pessoas com Deficiência (doravante
CDPD) e a legislação antidiscriminação da União Europeia (doravante UE)
The importance of Individual Action in Fighting Food Waste
No full textOs impactos negativos ambientais, sociais e econômicos gerados pelo Desperdício Alimentar, tem tornado o tema uma preocupação para governos, entidades, academia e sociedade, num contexto de aumento de população mundial, aumento da insegurança alimentar e fome somados as incertezas climáticas, nomeadamente, a escassez da água.
O presente projeto aborda a complexidade do Desperdício Alimentar, desde a definição do que pode ser considerado Desperdício Alimentar, as etapas onde ocorrem o desperdício de comida dentro do Sistema Alimentar Global, os impactos ambientais, sociais e econômicos gerados por ele, os motivos que levam pessoas desperdiçarem alimentos na sociedade atual, os benefícios da redução do desperdício, iniciativas e políticas públicas no combate ao Desperdício Alimentar, bem como a comunicação como estratégia de combate e redução do problema.
Propomos nesse trabalho refletir sobre o impacto das ações individuais no combate ao Desperdício Alimentar, a importância de induzir consumidores a melhores práticas de consumo e redução de descarte de alimentos. E, ainda, iluminamos também a necessidade de informar, comunicar e sensibilizar os consumidores sobre a questão do desperdício de comida, uma vez que o maior volume de alimentos desperdiçados é produzido na etapa do consumo.
E considerando a importância do impacto das ações individuais no combate ao Desperdício Alimentar, e a necessidade de inspirar e instruir novas atitudes e práticas aos consumidores, o projeto propõe a criação de um documentário sobre o Desperdício Alimentar, que apresentará a complexidade da questão, os impactos associados ao desperdício, os benefícios da redução do desperdício, e sobretudo, divulgará de que forma os consumidores podem reduzir o desperdício de alimentos na vida prática.
Nesse sentido, o presente trabalho apresenta como resultado, uma Proposta de criação de um filme documentário sobre o Desperdício Alimentar, no contexto português, com 60min de duração e que tem como público-alvo jovens e adultos. O trabalho foi dividido em partes, sendo que a primeira parte abordou o enquadramento teórico e revisão de literatura sobre o tema Desperdício Alimentar, a segunda parte, definiu o que é um filme documentário e etapas de produção, e a terceira parte apresentou a Proposta de criação de um filme documentário.The negative environmental, social and economic impacts generated by Food Waste have made the subject a concern for governments, entities, academia and society in a context of increasing of world population, increase of the food insecurity and hunger summed up to the climatic uncertainties, namely, water scarcity.
Present project approaches the complexity if Food Waste from the definition of what can be considered Food Waste, the steps where food waste occur inside the Global Food System, the environmental, social, and economic impacts generated by it, the reasons which take people to waste food in the current society, the benefits of waste reduction, public initiatives and policies in fighting Food Waste, as well as the communication as strategy to fight and reduce the problem.
Propose in this work is a reflection on the impact of individual actions in fighting Food Waste, the importance of encouraging consumers to best practices of consumption and food disposal reduction. We, yet also illuminate the necessity to inform, communicate, and sensitize consumers about the issue of food waste once the biggest volume of wasted food is produced at the consumption phase.
Considering the importance of the impact of individual actions towards fighting Food Waste, and the necessity to inspire and teach new attitudes and practices to the consumers, the project proposes the creation of a documentary film about Food Waste which will present the issue's complexity, the impacts associated to waste, the benefits in reducing waste, and above all, will promote in what way consumers can reduce food waste in their practical life.
In that sense, the present work presents as a result a proposal of creation of a documentary about Food Waste in the Portuguese context, with the duration of 60 minutes and which has as a target audience the young and the adults. The work has been split into parts, being the first part approaching the theoretical framing and literary revision over the subject of Food Waste, the second part defined what a documentary is and its production steps, and the third part presented the Proposal of creation of a documentary film
Criar modelo de negócio de bunker marítimo, para gerar crescimento de vendas da enco sarl - rmpresa nacional de combustiveis de São Tomé e Príncipe
No full textA ENCO apresenta-se em risco de não ter continuidade a sua atividade, dada a delicada
situação financeira que atravessa. Torna-se necessário encontrarem-se outras soluções. A
legislação obriga as embarcações a abastecerem nas empresas nacionais. Esta
oportunidade deve ser aproveitada. E este trabalho apresenta uma visão, para criar um
modelo de negócio inovador de bunker marítimo que possa tornar a ENCO numa empresa
que cresce de forma rentável, com foco nos navios de pesca, de apoio as plataformas
petrolíferas e navios militares do golfo da Guiné
O impacto que o modelo de economia de partilha tem na maximização do valor do processo de incubação
No full textA incubação é uma poderosa ferramenta de capacitação e alavancagem na consolidação de
um ecossistema empreendedor em que uma análise ao processo de incubação evidenciou
potenciais pontos de maximização de forma a elevar a sua proposta de valor focada nas
necessidades das startups e incubadoras.
Os resultados mostram um conjunto de fatores que classificamos como: O Papel das
Incubadoras, Os Desafios das Startups, Interconexão do Ecossistema, e o Conhecimento e
Competências.
A preponderância das incubadoras no desenvolvimento das startups tem demonstrado
crescimento e aceleração ao longo dos últimos anos, sendo unânime por todo o ecossistema o
seu potencial de otimização
TRASH
No full textTRASH é um texto dramatúrgico para um espectáculo homónimo que se inspira nas estéticas conceptuais de obras de autores como Tim Crouch, James Joyce, Duncan Macmillan, Jorge Andrade e Deborah Pearson, procurando explorar temas como saúde mental e a importância da arte na sua manutenção, a utilização autobiográfica enquanto intérpretecriador, a solidão e isolamento durante a pandemia COVID-19, a beleza e complexidade da voz interior e do diálogo possível com a mesma, e ainda o que significa estar/ser presente
e/ou ausente na ligação com o outro. Utilizando um conjunto de textos escritos entre março de 2020 e setembro de 2021, a ideia para a concretização deste espectáculo surgiu na sequência do encontro internacional Presence, Absence, Invisibility, promovido pelo grupo de investigação Performance e Cognição da Universidade Nova de Lisboa, que aconteceu em Lisboa em outubro de 2022. TRASH foca-se nas narrativas de poder e exclusão, na ecologia da presença e ausência cénicas, e na performatividade da (in)visibilidade resultante do
período pandémico. O presente relatório pretende enquadrar a escrita de um texto dramatúrgico original como projeto para um espetáculo, com um enquadramento teórico - sobre a autobiografia como fonte para ficção e encenação e sobre as consequências da situação pandémica na prática teatral – e uma descrição dos vários passos do processo criativo de TRASH e perspetivas para a sua encenação.TRASH is a dramaturgical text for a namesake show that is inspired by the conceptual aesthetics of works by authors such as Tim Crouch, James Joyce, Duncan Macmillan, Jorge Andrade and Deborah Pearson, seeking to explore themes such as mental health and the importance of art in maintaining it, the use of autobiography as an actor-creator, loneliness and isolation during the COVID-19 pandemic, the beauty and complexity of the inner voice and the possible dialogue with it, and also what it means to be present and/or absent in the connection
with the other. Using a set of texts written between March 2020 and September 2021, the idea for this show came about following the international meeting Presence, Absence, Invisibility, promoted by the Performance and Cognition research group at Universidade Nova de Lisboa, which took place in Lisbon in October 2022. TRASH focuses on narratives of power and exclusion, the ecology of scenic presence and absence, and the performativity of (in)visibility resulting from the pandemic period. This report aims to frame the writing of an original dramaturgical text as a project for a show, with a theoretical framework - on autobiography as
a source for fiction and staging and on the consequences of the pandemic situation on theatrical practice - and a description of the various steps of TRASH’s creative process and perspectives for its staging
Purkinje cell complex spikes in locomotor coordination and learning
No full text"Everyday we need to adapt to new situations where our movements need to remain precise and coordinated. We learn to adapt to these sit- uations by neural mechanisms that identify the ongoing movement and rapidly correct it. The cerebellum is a brain region with extensive repre- sentations of movement and has been linked to the sensorimotor prediction processes that occur during motor adaptation and learning. In cases of cerebellar damage in humans or other animal species, ataxia, or over- all lack of coordination is observed. Moreover, humans or animals with cerebellar damage show impairments in motor learning assays. Here we combined quantitative whole-body coordination measurements with so- phisticated genetic tools to manipulate and measure the cerebellar circuit to study interlimb coordination during locomotion and locomotor learn- ing in mice. This work focused on the role of complex spikes of Purkinje cells as error signals during different aspects of locomotion on a motorized treadmill and during adaptation to externally imposed locomotor asym- metries.(...)