Change in fluoride content of Maltese tapwaters : implications for oral health

Dietary intake of fluoride is believed to be largely derived from drinking water. In Malta, tap water presently contains less fluoride than is found in naturally occurring ground water obtained from aquifers. Over 55% of water production comes from reverse osmosis and such water is practically fluoride-free. Before the introduction of reverse osmosis water into the water budget, fluoride levels measured from 10 different tap waters averaged 0.51 ppm F-. Now, fluoride content measured from 19 tap water sources averaged 0.21 ppm F- and more than a third of these sources are practically fluoride-free. The incidence of dental caries in Malta has so far been low according to the international standards. We suggest that the lowering of the fluoride level in the water supplies may favour an escalation in the incidence of tooth decay in the future.peer-reviewe

The public service as a 'performing organisation'

As Malta’s term to lead the EU Presidency between January and June 2017 is under way, the main political issues that are on the political agenda and that are ultimately discussed by the EU citizens are the immigration crisis and Brexit. Both issues are undermining the foundations of the European Union and had stalled the EU project of becoming stronger and more unified, at least for the foreseeable future. There is another fundamental issue that is a growing concern amongst the EU member states, that of detachment between the political class, the public administrations and the citizens. Although this issue is now defined as a major challenge to the EU, there is no clear focus on how to overcome this problem. Dealing with such a massive task is not easy especially when considering the long list of factors and the continuum of stakeholders at play. One silent reform that could bring a real change in the day-to-day lives of EU citizens is the way public services are offered and managed. Public services are expected to meet the aspirations and the needs of the various spectra of groups within a society in a timely manner. Red tape and bureaucracy have become commonly used ‘buzz words’ and such a perception is weakening the good work done by the respective public administrations of the EU member states. A holistic performance management approach incorporating Key Performance Indicators (KPIs) could be the answer to streamline and improve the quality of public services while strengthening the efficiency and effectiveness in the way the services are offered to the citizens. This document was prepared between September 2016 and March 2017. It includes a literature review (Section 1) and an analysis of a survey conducted with all the European Commission and EU member states (Section 2) regarding the implementation and use of KPIs. The questions asked are detailed in the Appendix. The aspiration of the authors is that the theoretical and practical underpinnings outlined in this document be a channel to bring the citizens closer to the public administrations, the political class and ultimately the European Union.peer-reviewe

Early school leaving and wellbeing in Malta and beyond : a statistical analysis

Early school leaving is a complex educational, economic, and social issue with significant negative consequences for individuals, societies, and national economies. While Malta has been applauded for its fast declining rates of early school leaving, the country is still significantly above the EU average and above the rate of early school leaving in all other EU countries, bar one. Due to inherited educational structures and prevailing social, economic, and labour market conditions, Malta is recently experiencing slower rates in decline of early school leaving and a slight increase in the number of females in the early school leaving bracket. One hopes that recent comprehensive measures included in the Malta National Reform Programme and Education policies of recent years will contribute to the further decrease of the early school leaving rate in Malta, hopefully close to the ambitious target of halving the ESL rate from 20.4% to 10% by 2020. This study aims to contribute to the ongoing analysis, debate, and efforts focused on the reduction of the early school leaving rate by providing relevant evidence for understanding potential links between early school leaving and various aspects of wellbeing. The study also sets out to identify the knowledge gaps that exist in this domain and to prepare background information for a potential second phase of the study, which would focus on conversations with early school leavers around issues flagged by the present study. Ultimately, we intend for this research to prepare the way for future applied studies of early school leaving.peer-reviewe

Energetic, environmental and economic modelling of a solar-assisted residential micro-trigeneration system in a Mediterranean climate

Reducing energy consumption in buildings has become a priority for most countries. However, designing energy-efficient buildings is not a straightforward task - the increasing demand for high comfort standards, provided by conventional 'energy-hungry' cooling and heating devices conflicts with the need for demand reduction. Trigeneration, the simultaneous production of electricity, cooling and heating is often viewed as a means of improving energy-efficiency in large and medium sized buildings whilst still delivering thermal comfort. For hot climates, the benefit of utilising the waste heat emitted from an engine unit to power a thermally driven cooling device provides scope to utilise an otherwise wasted energy stream. However, in smaller sized residential buildings, the relatively low and intermittent energy demand coupled with high capital costs, has stifled the uptake of the technology - although the potential for substantial energy savings exists. Moreover, it is very common for home owners in hot climates to opt for other energy-saving devices such as solar water heaters (SWH), which would tend to reduce further the possible demand for space and water heating, possibly making the simultaneous use of both micro-trigeneration and SWH unfeasible. This paper compares the performance of a residential micro-trigeneration system to a hybrid micro-trigeneration/SWH system. The performance of both systems was simulated using a whole building simulation tool run at a high time resolution. The results obtained were then used to quantify the energetic and environmental performance of both systems; and also to assess their financial viability against the effect of varying fuel prices, electricity tariffs and a varying Feed-in Tariff (FIT). Results show that whereas the solar aided micro-trigeneration system obtains an overall higher (though marginal) energetic and environmental performance, the financial performance for the same fiscal parameters (fuel prices and electricity tariffs) deteriorates. Moreover FIT, plays an important role in the financial feasibility of the system

A parametric building energy simulation case study on the potential and limitations of passive design in the Mediterranean climate of Malta

The present case study sets out to investigate the potential and limitations of passive building design in a typical Mediterranean climate. The Maltese Islands were taken as the case study location. Assuming a fully detached, cuboid-shaped, generic multi-storey office building, one representative storey was modelled by means of the building energy simulation code WUFI®Plus. Thermal comfort was analysed based on the adaptive acceptable operative room temperature concept of EN 15251 for buildings without mechanical cooling systems. Assuming neither artificial heating nor cooling, the free-running operative room temperature was evaluated. By means of a parametric study, the robustness of the concept was analysed and the impact of orientation, window to wall area ratio, glazing, shading, thermal insulation, nighttime ventilation and thermal mass on the achievable level of thermal comfort is shown and discussed. It is concluded that in a well-designed building and by means of decent insulation (present case: Uwall = 0.54 W/(m2 · K)), double glazing, variable external shading devices and passive cooling by nighttime ventilation, a high level of thermal comfort is achievable in this climate using only very minor amounts of energy for artificial heating and cooling or possibly even none at all.peer-reviewe

Smart energy regions - cost and value

Considering the high energy bill paid by developed countries when it comes to energy, especially that related with the built environment, it is not surprising that improving energy-efficiency in buildings is high on both the national and international political agenda. Unfortunately improving the energy- efficiency of buildings through applications such as installing double g or roof insulation or renewable energy devices such as solar water heaters or photovoltaic panels comes at a premium.peer-reviewe

Hymn to the heroes of Malta

Ġabra ta’ poeżiji u proża li tinkludi: Alla fil-ħolqien ta’ Ġużè Agius Bonello – Is-sena u l-bniedem ta’ Ġużè Ellul-Mercer – Li tiżra’ taħsad ta’ Vic. Apap – Huwa ta’ Gino Muscat-Azzopardi – Żewġ friefet ta’ Vincent Caruana – Iċ-ċagħka ta’ Ġużè Borg – Warda midbiela ta’ C. Gauci – It-tfajla tas-sulfarini ta’ Albert M. Cassola – L-aħħar traduzzjoni ta’ May Butcher qabel ma mietet – Hymn to the heroes of Malta.N/

Energetic, environmental and economic modeling of a solar-assisted residential micro-trigeneration system in a Mediterranean climate

Reducing energy consumption in buildings has become a priority for most countries. However, designing energy-efficient buildings is not a straightforward task - the increasing demand for high comfort standards, provided by conventional ‘energy-hungry’ cooling and heating devices conflicts with the need for demand reduction. Trigeneration, the simultaneous production of electricity, cooling and heating is often viewed as a means of improving energy-efficiency in large and medium sized buildings whilst still delivering thermal comfort. For hot climates, the benefit of utilising the waste heat emitted from an engine unit to power a thermally driven cooling device provides scope to utilise an otherwise wasted energy stream. However, in smaller sized residential buildings, the relatively low and intermittent energy demand coupled with high capital costs, has stifled the uptake of the technology - although the potential for substantial energy savings exists. Moreover, it is very common for home owners in hot climates to opt for other energy-saving devices such as solar water heaters (SWH), which would tend to reduce further the possible demand for space and water heating, possibly making the simultaneous use of both micro-trigeneration and SWH unfeasible. This paper compares the performance of a residential micro-trigeneration system to a hybrid micro-trigeneration/SWH system. The performance of both systems was simulated using a whole building simulation tool run at a high time resolution. The results obtained were then used to quanti fy the energetic and environmental performance of both systems; and also to assess their financial viability against the effect of varying fuel prices, electricity tariffs and a varying Feed-in Tariff (FIT). Results show that whereas the solar aided micro-trigeneration system obtains an overall higher (though marginal) energetic and environmental performance, the financial performance for the same fiscal parameters (fuel prices and electricity tariffs) deteriorates. Moreover FIT, plays an important role in the financial feasibility of the system.peer-reviewe

Investigating the potential for passive cooling of ventilated roof systems in Malta

This paper explores the potential for passive cooling by manipulating a traditionally monolithic flat roof structure in Malta. This is investigated by isolating the cast in situ structural concrete slab from the topping screed, typically laid to falls, and ventilating the space. A test rig was set up under laboratory conditions where thermal performance was tested for in summer and winter. Results suggest that there is no significant contribution in winter when vents are kept closed but in summer convective cooling reduces indoor surfaces temperatures, alleviating discomfort conditions in upper floors, thus reducing the demand for cooling.peer-reviewe

A comparative study of the energetic performance of climate adaptive facades compared to static facade design in a Mediterranean climate

Energy-efficient design of building façades has so far predominantly been confined to static rigid forms. Recently however, attempts have been made to design environmentally responsive façades, hereby called Climate Adaptive Façades. These have the potential to better address the occupant's requirements, while also reducing energy demand. The present paper focuses on adaptable glazed façades, in a Mediterranean climate. It investigates the simulated energy performance of three types of climate-responsive façades that could be retrofitted to an existing glazed façade, in the process comparing the results to using comparable static façades solutions. Modelling dynamic façades is not an easy task and currently no single building performance simulation package appears to be capable of completely modelling the behaviour of these façades. For this reason a number of simulation packages had to be used to determine the energy demand required to achieve comfortable indoor thermal and lighting conditions. Through the results obtained, it was possible to compare energy demand of a dual-façade design approach, dynamic vs. static, thus identifying general trends. The results also highlight the fact that in order to improve over the predicted performance further studies using specialised tools capable of modelling such novel technologies are required.peer-reviewe