Some boundary effects in quantum field theory

We have constructed a quantum field theory in a finite box, with periodic boundary conditions, using the hypothesis that particles living in a finite box are created and/or annihilated by the creation and/or annihilation operators, respectively, of a quantum harmonic oscillator on a circle. An expression for the effective coupling constant is obtained showing explicitly its dependence on the dimension of the box.Comment: 12 pages, Late

The interregional trade union councils (IRTUC) and the crossborder workers: The case of the Galicia Norte de Portugal IRTUC

The border regions tended to be neglected by the European countries and by the social actors for a long time, attitude that only changed with the deepening of the European integration process that implied the reinforcement of the cooperation between these regions. The trade unions do not stay apart from this process and a new kind of structure began to emerge in the 70s, the Interregional Trade Union Council (IRTUC). The purpose of this paper is to address some insights on IRTUC’s institutionalization and activities. Based on a case study of the Galicia-Norte de Portugal IRTUC, through documental analysis and interviews with trade union officials, we will discuss its constitution, aims and organizational framework as well as its activities focused on the cross-border workers in a region where the migratory flows are traditionally very significant.info:eu-repo/semantics/publishedVersio

Paediatric acute basilar thrombosis successfully treated with intravenous alteplase

Acute ischaemic stroke has significant attendant morbidity and is one of the top ten causes of childhood death. It requires prompt investigation and management, however little is known about the safety and efficacy of acute thrombolytic therapies in childhood arterial ischaemic stroke. The authors report a case of a 13-year-old girl with an acute basilar thrombosis, successfully treated with intravenous recombinant tissue plasminogen activator and discuss the management of paediatric arterial ischaemic stroke.info:eu-repo/semantics/publishedVersio

RDF/S)XML Linguistic Annotation of Semantic Web Pages

Although with the Semantic Web initiative much research on web pages semantic annotation has already done by AI researchers, linguistic text annotation, including the semantic one, was originally developed in Corpus Linguistics and its results have been somehow neglected by AI. ..

Neonatal stroke associated with de novo antiphospholipid antibody and homozygous 1298C/C methylenetetrahydrofolate reductase mutation

Antiphospholipid antibodies are a recognised prothrombotic risk factor associated with acute ischaemic infarction. Most autoimmune diseases are rare in infants, and in the neonatal period, autoimmunity is related to transplacental passage of maternal immunoglobulin G autoantibodies. Distinguishing between de novo and acquired autoimmunity has important therapeutic implications and is crucial for determining the prognosis. We present a case of a neonatal thrombotic stroke associated with de novo synthesis of antiphospholipid antibodies, a homozygous 1298C/C methylene-tetrahydrofolate reductase mutation and a double-homozygous plasminogen activator inhibitor 1 polymorphism (PAI-1 844A/A and 675 4G/4G), which may have increased the final thrombotic risk. Her mother was not positive for antiphospholipid antibodies. The authors highlight an unequivocal evidence of a de novo case of paediatric antiphospholipid antibody syndrome and emphasise the need for a thorough investigation in cases of neonatal stroke including molecular thrombophilia study.info:eu-repo/semantics/publishedVersio

Construction of coherent states for physical algebraic systems

We construct a general state which is an eigenvector of the annihilation operator of the Generalized Heisenberg Algebra. We show for several systems, which are characterized by different energy spectra, that this general state satisfies the minimal set of conditions required to obtain Klauder's minimal coherent states.Comment: 15 pages, 3 figure

Tratamento Endovascular da Disseção Crónica Isolada da Aorta Abdominal

Isolated acute abdominal aortic dissection is a relatively rare event. Its natural history is not fully understood and its optimal treatment is not established. Open surgery represents the most described treatment but endovascular intervention has had increasing application. Isolated chronic abdominal aortic dissection is even less described in the literature. We describe three patients with isolated chronic abdominal aortic dissection who underwent endovascular treatment in our institution. Mean age at presentation was 82 years. Indication for surgical intervention was aneurismal degeneration. Mean aortic diameter at presentation was 46.7 mm. There was no perioperative mortality or reinterventions. Mean follow-up was 5.3 years (2-12 years). Late reintervention was needed in one patient, eight years after initial surgery, due to type 1 endoleak. According to our experience, endovascular intervention represents an effective and durable treatment option in isolated chronic abdominal aortic dissection. However, long-term follow-up is mandatory. Furthermore, larger studies are still needed to understand this disease and its adequate treatment.info:eu-repo/semantics/publishedVersio

The Interregional Trade Union Councils (IRTUC) and the cross-border workers: The cases of the Galicia-Norte de Portugal and Alentejo-Extremadura IRTUCs

As some literature states, the border regions tended to be neglected by the European countries and by the social actors for a long time (Magone, 2006). This attitude only changed with the beginning of the European integration process. Since then, the cooperation between cross-border regions and the deepening of their interdependence and integration was seen as a key factor for the success of the integration. The trade union movement does not stay apart from this process. In 1976, the first Interregional Trade Union Council (IRTUC) was born in the borders of Germany, France and Luxemburg. According to Prince and Magone, one of the most important tasks of the IRTUCs is related with the problems that affect the cross-border migrant workers, mainly the issues of equal treatment in terms of wages, social security, recognition of skills, taxation, etc., taking into account the disparities that characterise the cross-border regions. Prince and Hammer (2010) also states that the IRTUCs are focused in ensuring that the legal and administrative frameworks and collective agreements, which are diverse in the different sides of the borders, are applied in order to avoid social dumping. With their activities of information and legal advice they build trust and solidarity among the workers. For Hammer, IRTUCs also contribute to enhance trade union capacities, by facilitating and support cross-border networks at sectoral and company level, and have a role of political representation facing to the regional authorities. For Prince, some of the IRTUCs have evolved gradually for a more broadened range of activities, acting in the fields of employment and social policy, vocational training, regional development and the environment and Noack (2001) refers that they can range from a mere “network node” to an “interregional social partner” with a key function in the regional development. Portugal and Spain share a long border of over 1 000Km subject to a “double periphery” (Covas, 1997) in respect both to their countries and to the other countries of the EU. Along this border, we may identify four cross-border regions, which one having an IRTUC. The purpose of this paper is to address some insights on IRTUC’s institutionalization and activities. Based on a comparison of the IRTUC Galicia-Norte de Portugal and of the Alentejo-Extremadura one, through documental analysis and interviews with trade union officials, we will discuss its constitution, aims, organizational framework and activities focused on the cross-border workers.info:eu-repo/semantics/publishedVersio