Using cool paving materials to improve microclimate of urban areas e Design realization and results of the flisvos project

The present paper deals with the application of 4500 m2 of reflective pavements in an urban park in the greater Athens area. The aim was to improve thermal comfort conditions, reduce the intensity of heat island and improve the global environmental quality in the considered area. To our knowledge, this has been the largest application of cool pavements in urban areas in the world. To evaluate the thermal impact of cool paving materials, specific and detailed measurements of the climatic conditions in the park have been performed before and after the installation of the new materials. Validated computerized fluid dynamics techniques have been used to homogenize the boundary conditions occurring during the two experiments and to perform direct comparisons of the climatic quality in the park. It was estimated that the use of cool paving materials contributes to the reduction of the peak ambient temperature during a typical summer day, by up to 1.9 K. At the same time, the surface temperature in the park was decreased by 12 K, while comfort conditions have been improved considerably. It is concluded that the use of reflective paving materials is a very efficient mitigation technique to improve thermal conditions in urban area

Towards Canonical Quantum Gravity for G1 Geometries in 2+1 Dimensions with a Lambda--Term

The canonical analysis and subsequent quantization of the (2+1)-dimensional action of pure gravity plus a cosmological constant term is considered, under the assumption of the existence of one spacelike Killing vector field. The proper imposition of the quantum analogues of the two linear (momentum) constraints reduces an initial collection of state vectors, consisting of all smooth functionals of the components (and/or their derivatives) of the spatial metric, to particular scalar smooth functionals. The demand that the midi-superspace metric (inferred from the kinetic part of the quadratic (Hamiltonian) constraint) must define on the space of these states an induced metric whose components are given in terms of the same states, which is made possible through an appropriate re-normalization assumption, severely reduces the possible state vectors to three unique (up to general coordinate transformations) smooth scalar functionals. The quantum analogue of the Hamiltonian constraint produces a Wheeler-DeWitt equation based on this reduced manifold of states, which is completely integrated.Comment: Latex 2e source file, 25 pages, no figures, final version (accepted in CQG

Eligibility for interventions, co-occurrence and risk factors for unhealthy behaviours in patients consulting for routine primary care: results from the Pre-Empt study

Smoking, excessive drinking, lack of exercise and a poor diet remain key causes of premature morbidity and mortality globally, yet it is not clear what proportion of patients attending for routine primary care are eligible for interventions about these behaviours, the extent to which they co-occur within individuals, and which individuals are at greatest risk for multiple unhealthy behaviours. The aim of the trial was to examine 'intervention eligibility' and co-occurrence of the 'big four' risky health behaviours - lack of exercise, smoking, an unhealthy diet and excessive drinking - in a primary care population. Data were collected from adult patients consulting routinely in general practice across South Wales as part of the Pre-Empt study; a cluster randomised controlled trial. After giving consent, participants completed screening instruments, which included the following to assess eligibility for an intervention based on set thresholds: AUDIT-C (for alcohol), HSI (for smoking), IPAQ (for exercise) and a subset of DINE (for diet). The intervention following screening was based on which combination of risky behaviours the patient had. Descriptive statistics, χ2 tests for association and ordinal regressions were undertaken. Two thousand sixty seven patients were screened: mean age of 48.6 years, 61.9 % female and 42.8 % in a managerial or professional occupation. In terms of numbers of risky behaviours screened eligible for, two was the most common (43.6 %), with diet and exercise (27.2 %) being the most common combination. Insufficient exercise was the most common single risky behaviour (12.0 %). 21.8 % of patients would have been eligible for an intervention for three behaviours and 5.9 % for all four behaviours. Just 4.5 % of patients did not identify any risky behaviours. Women, older age groups and those in managerial or professional occupations were more likely to exhibit all four risky behaviours. Very few patients consulting for routine primary care screen ineligible for interventions about common unhealthy behaviours, and most engage in more than one of the major common unhealthy behaviours. Clinicians should be particularly alert to opportunities to engaging younger, non professional men and those with multi-morbidity about risky health behaviour. ISRCTN22495456. BACKGROUND METHODS RESULTS CONCLUSION TRIAL REGISTRATIO

Towards Canonical Quantum Gravity for Geometries Admitting Maximally Symmetric Two-dimensional Surfaces

The 3+1 (canonical) decomposition of all geometries admitting two-dimensional space-like surfaces is exhibited. A proposal consisting of a specific re-normalization {\bf Assumption} and an accompanying {\bf Requirement} is put forward, which enables the canonical quantization of these geometries. The resulting Wheeler-deWitt equation is based on a re-normalized manifold parameterized by three smooth scalar functionals. The entire space of solutions to this equation is analytically given, exploiting the freedom left by the imposition of the {\bf Requirement} and contained in the third functional.Comment: 27 pages, no figures, LaTex2e source fil

Clientelism and corruption: Institutional adaptation of state capture strategies in view of resource scarcity in Greece

How do strategies of state capture adapt to tight fiscal conditions? The article uses a historical institutionalist approach and content analysis to study the case of Greece. Three theoretically relevant patterns of institutional adaptation are unearthed: first, limited resources for state capture do indeed trigger self-limitation initiatives as expected, but these initiatives replace costly benefits with less costly ones. Second, different forms of capture have different implications for the terms of political competition. Third, there is a mutually reinforcing relationship between clientelism and corruption, which becomes pronounced in the creative ways by which strategies of capture adjust to shifting opportunities and constraints. Clients are appointed in state offices and extract bribes directly from citizens. ‘Client corruption’ replaces extraction from the state with extraction through the state, which is less costly for the public finances: the benefit the governing party gives to its clients is the ‘right’ to extract rents for themselves

From the Sum of Near-Zero Energy Buildings to the Whole of a Near-Zero Energy Housing Settlement: The Role of Communal Spaces in Performance-Driven Design

Almost a century ago Modernism challenged the structure of the city and reshaped its physical space in order to, amongst other things, accommodate new transportation infrastructure and road networks proclaiming the,nowadays much-debated ‘scientificated’ pursuit of efficiency for the city. This transformation has had a great impact on the way humans still design, move in, occupy and experience the city. Today major cities in Europe, such as Paris and London, are considering banning vehicles from their historic centers. In parallel, significant effort is currently underway internationally by designers, architects, and engineers to integrate innovative technologies and sophisticated solutions for energy production, management, and storage, as well as for efficient energy consumption, into the architecture of buildings. In general, this effort seeks for new technologies and design methods (e.g., DesignBuilder with EnergyPlus simulation engine; Rhicoceros3D with Grasshopper plugin and Ecotect, Radiance and EnergyPlus tools) that would enable a holistic approach to the spatial design of Near-Zero Energy buildings, so that their ecological benefits are an added value to the architectural design and a building’s visual, and material, impact on its surrounding space. The paper inquires how the integration of such technological infrastructure and performance-orientated interfaces changes yet again the structure and form of cities, and to what extent it safeguards social rights and enables equal access to common resources. Drawing from preliminary results and initial considerations of ongoing research that involve the construction of four innovative NZE settlements across Europe, in the context of the EU-funded ZERO-PLUS project, this paper discusses the integration of novel infrastructure in communal spaces of these settlements. In doing so, it contributes to the debate about smart communities and their role in the sustainable management of housing developments and settlements that are designed and developed with the concept of smart territories

Analyzing social networks of destructive behaviours in universities [Analizando las redes sociales de comportamientos destructivos en las universidades]

The aim consists in presenting determinants and types of verbal aggressiveness, bullying and Machiavellian behaviour among Physical Education students. Twelve network samples were collected from four Greek departments (538 students). Network questionnaires were used. Visone software was used for calculating network variables (in/outdegree, Katz, pagerank, authority). Spearman and PCA have been implemented for relating non-network variables with network ones. Results: Travelling abroad for athletic reasons, surfing internet for studies and being inspired from others’ behaviours trigger disruptive behaviours. Mothers’ education level, economic state, surfing internet for entertainment encourage victimization. Students who have experienced these detrimental behaviours as victims or victimizers during school years continue to experience destructive behaviours during academic years showing that such negative behaviours are adopted. © 2020, Hipatia Press. All rights reserved

Diachronic Analysis of Verbal Aggressiveness, Machiavellianism and Bullying through Social Network Analysis [Análisis diacrónico de agresividad verbal, maquiavelismo y bullying medianteanálisis de redes sociales]

Aim of this research is the diachronic analysis of verbal aggressiveness, bullying and Machiavellianism among physical education students regarding their diachronic evolvement and stability of victimizers and victims during the semester. Standardized network questionnaires were used. Twelve network samples (students’ semester classes) were collected from four Greek departments (totally 538). Network variables (in/out-degree, Katz status, pagerank, authority) were calculated via Visone software while Spearman test was implemented for diachronic network analysis. Results: The strengthening of practicing such behaviours may reasonably be attributed to the fact that students become more and more familiar to each other during the semester. Threat appears to be stable and unchangeable in contrast to irony. Most stable bullying behaviour is “refusing help”. Evolvement of “exclusion” into “refusing help” was observed. “Deception” indicates a predisposition for “back-stabbing”. A remarkably weak stability of victimization in verbal aggressiveness was observed with “exclusion” to be a presage of further abuse. © 2021, Ministry Education and Science. All rights reserved