Goldgruber J.,Burgenland University of Applied Sciences |
Ahrens D.,Aalen University of Applied Sciences
Journal of Public Health | Year: 2010
Background: Workplace health promotion and primary prevention interventions are highly prevalent. However, their effectiveness remains mostly unclear. Aim: This article compiles and summarizes the results of current reviews concerning the effectiveness of health promotion and primary prevention interventions in the workplace. Subjects and methods: Studies were selected from four electronic databases on the basis of the following criteria: (1) Meta-analysis or systematic reviews, (2) published in international peer-reviewed journals (3) between 1 January 2004 and 30 June 2008 (4) in English or German (5) that examined the effectiveness of workplace health promotion and primary prevention interventions. Results: Seventeen reviews met the inclusion criteria and were subsequently categorized into the following areas of intervention: stress, physical activity and nutrition, organizational development, smoking, and ergonomics and back pain. Singular interventions showed limited effectiveness. Workplace interventions aimed at helping individuals reported substantially greater effects than workplace interventions aimed at the workforce as a whole; here, methodological influences play an important role. Conclusions: The greatest results are achievable through comprehensive multimodal (or systemic) programs including relational and behavioral elements. Future research is needed in the conception of methodologically sound and setting-appropriate study designs. © 2009 Springer-Verlag.
Heschl C.,Burgenland University of Applied Sciences |
Inthavong K.,RMIT University |
Sanz W.,University of Graz |
Tu J.,RMIT University
Computers and Fluids | Year: 2013
Flow patterns produced by linear diffusers are highly dependent on the turbulent momentum exchange process. Hence a realistic computation of indoor room airflows that are produced from plane wall and free jets requires an accurate prediction of the anisotropic turbulent stresses. This is particularly the case in regions near the wall and entrainment effects which are caused by the turbulent shear stresses. For this reason a non-linear eddy viscosity assumption is presented which can be adjusted to account for the turbulent mixing process in the free shear flow region, and to reproduce the redistribution of the turbulent normal stresses near the wall. Based on several test cases such as a free and plane wall jet, IEA (International Energy Agency) Annex 20 room airflow, and a 3D room with a partition, the essential characteristics of the linear and non-linear k-ε, k-ω and ν2-f turbulence models are analysed. Thereby it is shown that the proposed non-linear assumption can improve the prediction of linear diffuser airflows. © 2012 Elsevier Ltd.
Inthavong K.,RMIT University |
Tu J.,RMIT University |
Heschl C.,Burgenland University of Applied Sciences
Computers and Fluids | Year: 2011
Commercial CFD codes are commonly used to simulate models that involve complicated geometries such as the human nasal cavity. This means that the user has to work within the limitations of the available models of the CFD code. One such issue is the turbulent dispersion of particles in the Lagrangian reference, namely the Discrete Random Walk (DRW) model which overpredicts the deposition of smaller inertial particles, due to its inherent isotropic treatment of the normal to the wall fluctuation, v′, in the near wall region. DNS data for channel flows has been used to create a function that reduces the turbulent kinetic energy (TKE) to match the v′ profile which has delivered improved particle deposition efficiency results. This paper presents an alternative approach to reduce the TKE to match v′, by directly taking the profile from the v2-f turbulence model. The approach is validated against experimental pipe flow for a 90° bend and then applied to particle dispersion in a human nasal cavity using Ansys-Fluent which showed improved results compared to no modification. © 2011.
Rixrath D.,Forschung Burgenland GmbH |
Wartha C.,Burgenland University of Applied Sciences
Integrated Environmental Assessment and Management | Year: 2016
The Renewable Energy and Efficiency Action (REACT) project is a European Union–funded cross-border cooperative venture featuring the participation of companies and researchers from the Austrian state of Burgenland and western Slovakia that is developing zero-energy concepts for newly built single-family homes. A variety of building structures are defined for family houses, and the different impacts they have on the environment are evaluated over the entire life cycle. This paper aims to compare the environmental impacts of different building shells during both the construction and the demolition phases. However, the operation phase of the building is not evaluated. One of the findings of the project thus far is that the demolition and disposal of building materials should be included in any such evaluation. For some environmental impact assessment categories, both demolition and disposal are important. The environmental impacts of various end-of-life scenarios can differ greatly based on the disposal method (e.g., landfill, incineration, recycling) chosen and on the proportion of recycled content. Furthermore, the results show that manufacturing building materials from renewable resources can have strong environmental impacts, particularly when substantial amounts of fossil fuel are required in their production. Integr Environ Assess Manag 2016;12:437–444. © 2016 SETAC. © 2016 SETAC
Puchegger M.,Burgenland University of Applied Sciences
Energy and Buildings | Year: 2015
Due to the rising use of fluctuating renewable energy production, electricity production curve in the future will not be able to follow the demand curve anymore. Therefore, time-critical, variable charges are likely to be introduced. Whereas large consumers of electricity already have to pay attention to this issue - the peak demand is measured and cost effective for customers with a consumption higher than 100,000. kW. h or connection power more than 50. kW  - the topic will become relevant for other customers in the future. Due to the roll-out of smart metres, it is very likely that time-relevant tariffs will become standard for all kinds of users, which means that the moment of electricity consumption will be cost-relevant. This paper deals with the electric load behaviour of office buildings and their potential to use demand side management (DSM) to optimise load behaviour. Because of use during the day, when prices are usually higher than during the night, office buildings mainly demand electrical energy during periods of high prices. By identification and utilisation of DSM potential, considerable sections of the demand can be shifted to hours with lower prices. Concerning integration of photovoltaic systems, two aspects has to be taken into account. When PV is an additional option to reduce electrical energy demand during high prices, on-site produced electricity should be also used on-site and therefore it has to be assured, that demand does not fall below PV-production. Another possibility to shift loads is to use thermal or electrochemical storage systems. © 2015 Elsevier B.V.
Sommer M.,Bioenergy 2020+ GmbH |
Ragossnig A.,Burgenland University of Applied Sciences
Waste Management and Research | Year: 2011
This article focuses on analysing the development of waste-generated energy in the countries of the European Union (EU 27). Besides elaborating the relevant legal and political framework in the waste and energy sector as well as climate protection, the results from correlation analyses based on the databases of the energy statistics from Eurostat are discussed. The share of energy from waste is correlated with macro-economic, waste- and energy-sector-related data, which have been defined as potentially relevant for energy recovery from waste in the countries of the European Union. The results show that a single factor influencing the extent of waste-generated energy could not be isolated as it is being influenced not only by the state of economic development and the state of development of waste management systems in the respective countries but also by energy-sector-related factors and the individual priority settings in those countries. Nevertheless the main driving force for an increase in the utilization of waste for energy generation can be seen in the legal and political framework of the European Union leading to the consequence that market conditions influence the realization of waste management infrastructure for waste-generated energy. © The Author(s) 2011 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.
Hauer K.,Burgenland University of Applied Sciences
Studies in Health Technology and Informatics | Year: 2015
Due to demographic changes, the number of elderly people who are in need of care is increasing. Assistive technologies make it possible for many elderly people to remain home despite their health conditions, which many prefer. Quality is an essential element of nursing care, and the elderly are becoming increasingly aware of this and are beginning to make high demands. The aims of this paper, which is based on a master's thesis, were to identify quality criteria in the field of assistive technologies and to present indicators for measuring quality. An extensive literature research was conducted for the theoretical part, and the empirical part employed a qualitative survey. The results show that the elderly's contentment and quality of life are the decisive factors for quality. A catalogue of quality indicators was developed by merging the results from literature with those from the expert consultation. To conclude, further research in this context, based on the results of this paper, is needed, in order to support the increasing use of assistive technologies. © 2015 The authors and IOS Press.
Geyer-Hayden B.,Burgenland University of Applied Sciences
Procedia Computer Science | Year: 2016
In this forum, we would like to discuss current developments on teaching Knowledge Management with Flipped Classroom. We will start by briefly introducing the Flipped Classroom concept. And then show some good and not so good practices in the field of Knowledge Management and a Force Field Analysis. © 2016 The Author(s).
Stutterecker W.,Forschung und Technologietransfer Pinkafeld GmbH |
Blumel E.,Burgenland University of Applied Sciences
Energy | Year: 2012
In order to achieve national, European and international energy goals, energy efficiency strategies in the building sector have to be implemented. The passive house standard and low energy standards are already successfully established in single dwelling houses. These high performance standards are starting to penetrate into the sector of housing associations. A case study about an apartment building constructed by a housing association is presented here. It describes the monitoring concept and the results of the 1st year of monitoring. Depending on the definition of the zero energy building standard (extent of loads included in the balancing), the building could be classified as an energy plus building or as a building, which uses more energy, than is supplied by on-site generation. If the building's total energy use (including user specific loads) is defined as load, only 34.5% of these loads were provided by the net energy output of the PV system. If only the heating energy demand is defined as load, the PV system even yielded a surplus of 45.6% of the energy load. © 2012 Elsevier Ltd.
Kelz A.,Burgenland University of Applied Sciences
Proceedings of the European Conference on Games-based Learning | Year: 2011
Virtual learning environments have become part of nearly every educational programme in higher and further education. Hence, competent teachers, tutors and trainers are a major key to success in higher education and need a thorough grounding in how to design, produce, use and evaluate e-learning and blended learning resources. But how do teachers actually gain the skills and insights you need to practice e-learning and blended learning effectively and efficiently and how do they develop a critical understanding of the pedagogical issues involved in the design, development and implementation of e-learning in their professional context? This paper focuses on the support offered to acquire and extend the skills needed to "teach online" from the institutional point of view of an Austrian university of applied sciences. It is shown in what way an institution tries to support teachers to gain the know-how to "transform" their teaching methods, to support them to make effective use of learning management systems and the web as an educational resource. Finally, the paper refers to what kind of nationwide training is offered to university teachers to develop the competencies needed to teach online effectively.