University of Piraeus

About: University of Piraeus is a education organization based out in Piraeus, Attiki, Greece. It is known for research contribution in the topics: Context (language use) & Computer science. The organization has 1731 authors who have published 6209 publications receiving 106699 citations.

Internet of Medical Things (IoMT): Acquiring and Transforming Data into HL7 FHIR through 5G Network Slicing

Abstract: The Healthcare 4.0 era is surrounded by challenges varying from the Internet of Medical Things (IoMT) devices’ data collection, integration and interpretation. Several techniques have been developed that however do not propose solutions that can be applied to different scenarios or domains. When dealing with healthcare data, based on the severity and the application of their results, they should be provided almost in real-time, without any errors, inconsistencies or misunderstandings. Henceforth, in this manuscript a platform is proposed for efficiently managing healthcare data, by taking advantage of the latest techniques in Data Acquisition, 5G Network Slicing and Data Interoperability. In this platform, IoMT devices’ data and network specifications can be acquired and segmented in different 5G network slices according to the severity and the computation requirements of different medical scenarios. In sequel, transformations are performed on the data of each network slice to address data heterogeneity issues, and provide the data of the same network slices into HL7 FHIR-compliant format, for further analysis.

Cost Assessment of Ship Emission Reduction Methods at Berth: The Case of the Port of Piraeus, Greece

Abstract: This paper addresses the problem of ship exhaust emissions at the Port of Piraeus and undertakes the challenge of finding a cost-effective option for its reduction according to the upcoming requirements of the 2005/33/EU Directive, through analysis of port traffic data and the utilisation of the experience gained through previous studies in this field. The Port of Piraeus makes a particularly suitable reference for this type of work, since it is one of the busiest and highly urbanised ports in the world. It is shown that cruise ships calling at Piraeus fulfill the criteria of selection for such an exercise by virtue of their frequency of calling, berth power requirements and time spent at berth. It was found that, according to current practice, cruise ships at berth consume 11 034 tons of fuel and produce 620.1 tons of NOX, 274.8 tons of SO2 and 20.7 tons of PM, totalling to 915.6 tons of exhaust emissions per year. This represents an overall annual cost of 21 million euro, divided between private (bunker...

Building trust for excellence in performance and adaptation to change

Abstract: In the last 20 years significant developments in science, technology and the world economy have brought dramatic change in almost every sphere of human activity. Today's pace of change has become non-linear, accelerating and almost totally unpredictable. Our present search for ways to achieve sustainable excellence in performance are not to be found in models or metaphors of an organization as an ‘ideal machine’ from physics, but in those of biology and ecology. In an ecology-oriented worldview, an organization's image is that of a vibrant network of interacting human agents. The new image of the competitive field is now that of a continually evolving business landscape, shaped by the incessant waves of technological and economic change. Even though conventional assumptions about managing organizations – which shape actions – need to be replaced, the fundamental objectives of leadership remain nevertheless the same. First, it is important to maintain a high level of current performance, a task th...