Part 7: New Methods and Tools for Big DataInternational audienceIn this paper, big data and visual analytics techniques for comparing building performance under different scenarios and designs are presented. Large data consist of building information, energy consumption, environmental measurements and occupancy information, which are combined and correlated utilizing data analytics techniques, so as to extract useful semantic information about building performance. Also, visual analytics techniques are exploited to visualize them in a compact and comprehensive way taking into account properties of human cognition, perception and sense making. They analyze and visualize the performance of the buildings under comparison in the spatio-temporal domain assisting the analyst to compare them and detect patterns, templates and crucial points that are difficult to be detected otherwise. The performance comparison of different buildings or buildings of different designs or buildings with space usage rearrangement is an important factor in engineering that leads to building renovation and construction with low energy consumption and gas emissions in conjunction with comfort, utility and durability

When we think of the term "space," we tend to imagine an onshore area with certain features, such as borders, governing laws and regulations, land uses, geomorphology, materials, and substance. Seldom, however, we will think of the sea as space, despite the fact that it has all the aforementioned characteristics: it covers a certain area, it has specific features and serves different operations. For Mediterranean countries like Greece, the sea has always been a core element of their identity in both geographical and cultural terms. Throughout history, the sea served as a means to boost their economies through trade and other maritime activities and their culture through interaction with other cultures and civilizations. Nowadays, the sea is set to play yet another important role in terms of renewable energy exploitation and energy self-sufficiency. One can therefore easily understand how important this space is. However, the sea's significance in these aspects has not been fully fathomed yet, nor is it considered as a space that needs to follow specific rules for its "healthy" development. This paper tries to identify how the introduction of Blue Energy can function as a driving force for the conceptualization of the Mediterranean Sea as space and, subsequently, for its regulation. Furthermore, it is presenting the opportunities that Blue Energy technologies can bring to Greece and to any Mediterranean country for a prosperous, environmentally friendly and sustainable future.

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