QCD and strongly coupled gauge theories : challenges and perspectives

We highlight the progress, current status, and open challenges of QCD-driven physics, in theory and in experiment. We discuss how the strong interaction is intimately connected to a broad sweep of physical problems, in settings ranging from astrophysics and cosmology to strongly coupled, complex systems in particle and condensed-matter physics, as well as to searches for physics beyond the Standard Model. We also discuss how success in describing the strong interaction impacts other fields, and, in turn, how such subjects can impact studies of the strong interaction. In the course of the work we offer a perspective on the many research streams which flow into and out of QCD, as well as a vision for future developments.Peer reviewe

Sintomas indicativos de disfagia em portadores de DPOC Symptoms of dysphagia in patients with COPD

OBJETIVO: Identificar os sintomas indicativos de disfagia em indivíduos portadores de DPOC a partir de um questionário de autopercepção. MÉTODOS: Foram avaliados 35 indivíduos portadores de DPOC e 35 indivíduos sem a doença pareados por gênero e idade. O grupo de estudo foi avaliado quanto a gravidade da doença, sensação de dispneia, índice de massa corpórea (IMC) e sintomas de disfagia. O grupo controle foi avaliado quanto a IMC e sintomas de disfagia. RESULTADOS: Os sintomas mais frequentes de disfagia apresentados pelos participantes do grupo de estudo foram sintomas faríngeos/proteção de vias aéreas (p < 0,001), sintomas esofágicos/histórico de pneumonia (p < 0,001) e sintomas alimentares (p < 0,001). As seguintes variáveis apresentaram correlações positivas: VEF1 e IMC (r = 0,567; p < 0,001); sintomas faríngeos/proteção de vias aéreas e dispneia (r = 0,408; p = 0,015); e sintomas esofágicos/histórico de pneumonia e sintomas faríngeos/proteção de vias aéreas (r = 0,531; p = 0,001). Houve correlação negativa entre sintomas alimentares e IMC (r = -0,046; p < 0,008). CONCLUSÕES: Os resultados mostraram que os participantes com DPOC apresentaram sintomas de disfagia relacionados à fase faríngea e esofágica da deglutição; ao mecanismo de proteção das vias aéreas; ao histórico de pneumonia e aos sintomas alimentares.<br>OBJECTIVE: To identify symptoms of dysphagia in individuals with COPD, based on their responses on a self-perception questionnaire. METHODS: The study comprised 35 individuals with COPD and 35 healthy individuals, matched for age and gender. The study group was assessed regarding COPD severity; sensation of dyspnea; body mass index (BMI); and symptoms of dysphagia. The control group was assessed regarding BMI and symptoms of dysphagia. RESULTS: The most common symptoms of dysphagia in the study group were pharyngeal symptoms/airway protection (p < 0.001); esophageal symptoms/history of pneumonia (p < 0.001); and nutritional symptoms (p < 0.001). Positive correlations were found between the following pairs of variables: FEV1 and BMI (r = 0.567; p < 0.001); pharyngeal symptoms/airway protection and dyspnea (r = 0.408; p = 0.015); and esophageal symptoms/history of pneumonia and pharyngeal symptoms/airway protection (r = 0.531; p = 0.001). There was a negative correlation between nutritional symptoms and BMI (r = -0.046; p < 0.008). CONCLUSIONS: Our results show that the individuals with COPD presented with symptoms of dysphagia that were associated with the pharyngeal and esophageal phases of swallowing, as well as with the mechanism of airway protection, a history of pneumonia, and nutritional symptoms