In many scientific and engineering areas there are emerging software services available over the Web. The reason for deploying such services in the Cloud is either to reduce the operational costs or to support the peaks in their usage profiles. The algorithms employed in such services are usually result of a long term research and technology development work, so it is beneficial to reuse those critical application parts when developing new Cloud applications. This paper investigates the possibilities to introduce a Model Driven Architecture (MDA) for the Cloud computing domain, which would support composition, customization, flexibility, maintenance and reusability of Cloud application components in the particular case of scientific and engineering applications. The underlying middleware technology of choice is the mOSAIC Platform as a Service (PaaS) solution. This choice is motivated by the fact that in mOSAIC a Cloud application consists of loosely coupled components, which are either generic and provide for key resource types needed by an application (computation, storage, communication) or custom made, e.g. based on existing legacy software. The MDA approach is illustrated through the design and operation of an application for analysis of structures. It is shown that a relatively simple design can be used to address two application bottlenecks: the varying number of users and the computational complexity of the given problem. The design reduces the necessary application development efforts and the key components can be reused for similar applications.
COBISS.SI-ID: 6248289
The paper makes and overview of recognized methods of assessment and certification of sustainable building (LEED, BREAM, DGNB), describes the related standardization on building sustainability under development in CEN/TC/350 and describes the FP7 OPEN HOUSE open source method for sustainability assessment, development procedure, the indicators (56 full list indicators and 30 core indicators), rating and weighting system. As an alternative method CESBA tool for sustainability is described with a reduced list of indicators probably more likely to be used in public procurement. Further steps for integration of assessment methods in green public procurement are discussed.
COBISS.SI-ID: 512049947
Cloud computing technologies offer a lot of advanced possibilities to applications, such as elasticity, redundancy and fault tolerance. Many computationally and data-intensive engineering applications could benefit from being ported to the Cloud. The goal of the present work was to develop an effective and general-purpose programming framework that can be used by engineers to port their applications to the Cloud with minimal changes in their existing applications. This work focuses on applications developed in MathWorks' Matlab. To port the applications to the Cloud, the mOSAIC Platform as a Service (PaaS) was used. The mOSAIC PaaS distinguishes from other similar platforms by being Open Source and by its independence from the Infrastructure as a Service (IaaS) provider. The performance of the overall solution was tested against a benchmarking engineering application to estimate the Matlab performance for which two different Cloud providers - Amazon EC2 and Eucalyptus were used. The results indicate that the developed programming code assures successful porting of engineering applications to the Cloud.
COBISS.SI-ID: 6650721
The paper justifies the wall heating system (Temperierung) as an effective preventive strategy for conservation of heritage buildings. Comparison of actual measurements from 2011-2013 period with those from IDA-ICE software simulations allowed the verification of both, unheated and heated, hygrothermal simulation models. A verified model enable more reliable forecasting of how future climate changes would influence microclimatic conditions and enable the evaluation of implemented mitigation strategy impacts. Based on dynamic simulation of wall tempered hall in Brezice castle the paper presents the potential benefits of the use of Temprierung for preventive conservation and economic benefits.
COBISS.SI-ID: 512046363
Slovenia has established comparative methodology framework for the minimum energy performance requirements on the basis of article 5 of the Directive EPBD - Recast (2010/31/EU) and in according with Annex III, differentiating between categoris of buildings. Choosing a single family house, energy performance of the buildings was calculated with IDA Indoor Climate and Energy as a whole year detailed and dynamic multizone simulation study of indoor climate and energy use. The minimum energy performance requirements are represented by the area of the cost curve that delivers the lowest cost for the end-users and society. The results demonstate that the minimum requirements set for new single family houses in national building codes in force are more severe than the minimum requirements corresponding to the cost optimal level, mainly due to the national energy and climate policy targets in the building sector. Among systems, heat pumps proved to be important competitors in seeking the cost optimal building performance. It was shown, that heat pumps are environmentally acceptable and economically efficient way of heating with plausible positive social multiplied effects. Heat pumps have support of local economy and are best on well-established technology, their operational is efficient, reliable and are auitable for almost all buildings. In the future it is expectd to reach higher coefficient of performance (COP), especially at lower temperatures. Higher COP, together with further increase of renewables share in national electrical power system is making heat pumps important foundation for further sustainable development in line with sustainable principles.
COBISS.SI-ID: 512046619