27 documents found, page 1 of 3
Predominance of Genotype 5 Hepatitis Delta Virus Infection in a Portuguese Hepa...
Cardoso, M.F.; Coelho, H.; Branco, J.C.; Braganca, S.; Alexandrino, G.; Costa, M.N.; Carvalho, R.; Pádua, E.; Martins, AHepatitis delta virus (HDV) infection is the most severe form of viral hepatitis. Genotype 1 (HDV-1) is by far the most prevalent in Europe and globally, while HDV-5 predominates in Western Africa. Data about HDV seroprevalence in Portugal are scarce and genotyping studies have not been performed yet. We aimed to assess the seroprevalence and genotypes of HDV in a large cohort of HBsAg-positive patients followe...
The mediator role of unmet needs on quality of life in myeloma patients
Pereira, M. G.; Vilaça, M.; Pereira, M.; Ferreira, G.; Monteiro, S.; Coelho, H.; Geraldes, C.; Gonçalves, C.; da Costa, F. Leal; Marques, H.Purpose: The diagnosis of multiple myeloma (MM) has a significant impact on patients. This study analyzed the mediating role of patients' unmet needs in the relationship between psychological morbidity/social support and quality of life (QoL). Methods: This study included 213 patients with MM recruited from the outpatient medical oncology and clinical hematology services from five hospitals. Patients who meet t...
The mediator role of unmet needs on quality of life in myeloma patients
Pereira, M. Graça; Vilaça, Margarida; Pereira, M.; Ferreira, G.; Monteiro, Luís S.; Coelho, H.; Geraldes, C.; Gonçalves, C.; da Costa, F. LealThe diagnosis of multiple myeloma (MM) has a significant impact on patients. This study analyzed the mediating role of patients’ unmet needs in the relationship between psychological morbidity/social support and quality of life (QoL). Methods This study included 213 patients with MM recruited from the outpatient medical oncology and clinical hematology services from five hospitals. Patients who meet the study c...
Measuring agenda-setting effects on Twitter during the 2016 UK EU referendum
Santos, T.; Louçã, J.; Coelho, H.This paper investigates first-level agenda-setting effects on Twitter during UK's EU referendum campaign. Using topic-modeling techniques, we investigate the dynamics of the interaction between users and the media content, and how the media outlets relate to each other. Results show that traditional media outlets dominated the debate, but alternative media played an important part. The media outlets that suppor...
ProtestLab: a computational laboratory for studying street protests
Lemos, C. M.; Coelho, H.; Lopes, R. J.We present an Agent-Based model called ProtestLab for the simulation of street protests, with multiple types of agents (protesters, police and ‘media’) and scenario features (attraction points, obstacles and entrances/exits). In ProtestLab agents can have multiple “personalities” (implemented via agent subtypes), goals and possible states, including violent confrontation. The model includes quantitative measure...
On legitimacy feedback mechanisms in agent-based modeling of civil violence
Lemos, C. M.; Lopes, R. J.; Coelho, H.Epstein's agent-based model (ABM) of civil violence has been very popular and successful due to its formulation soundness, simplicity, and explanatory power. Variants of this model have been proposed for the simulation of different types of social conflict phenomena (worker protest, riots, or urban crime) and for investigating the effect of mechanisms that are not considered in the original model. In a previous...
Network influence effects in agent-based modelling of civil violence
Lemos, C. M.; Hélder Coelho; Coelho, H.; Lopes, R. J.In this paper we describe an agent-based model of civil violence with network influence effects. We considered two different networks, ‘family’ and ‘news’, as a simplified representation of multiple-context influences, to study their individual and joint impact on the size and timing of violence bursts, the perceived legitimacy, and the system’s long term behaviour. It was found that network influences do not c...
Quantitative measures of crowd patterns in agent-based models of street protests
Lemos, C.; Lopes, R. J.; Hélder Coelho; Coelho, H.In this work we describe the introduction of quantitative measures of emergent crowd patterns in an existing Agent-Based model (ABM) of street protests with multiple actors (police, protester and ‘media’ agents). The model was applied to a scenario of a police force defending a government building which protesters seek to invade. The improved model provided a coherent ‘narrative’ of the simulations and highligh...
Agent-Based modeling of protests and violent confrontation: A micro-situational...
Lemos, C; Coelho, H.; Lopes, R. J.We propose an innovative Agent-Based model of street protests with multiple actors: police agents, three types of protesters (“hardcore”, “hangers- on” and “passers-by”), and “media” agents that seek to witness and publish episodes and situations of violence. Agents have multiple goals and action selection is performed using a “personality” vector together with context rules that provide adaptation. Protesters ...
An agent-based model of civil violence with imprisonment delay and legitimacy f...
Lemos, C.; Lopes, R.; Coelho, H.Epstein's Agent-Based model of civil violence has been very successful due to its simplicity and explanatory power, but does not represent important phenomena, such as processes operating at multiple scales and feedback mechanisms. In this work, we present an extension of Epstein's model that includes the effects of imprisonment delay, media coverage and feedback of rebellion bursts of the government's legitima...