Nikitas Nikitakos

Prof. Nikitas Nikitakos

University of the Aegean
orcid

Research Focus & Metrics

Academic Career Length

22Years (2005-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Iosif ProgoulakisIosif Progoulakis
Iosif Progoulakis
PRPaul Rohmeyer
Paul Rohmeyer
Nikitas NikitakosNikitas Nikitakos
Nikitas Nikitakos
The integration of IT, OT, and human factor elements in maritime assets is critical for their efficient and safe operation and performance. This integration defines cyber physical systems and involves a number of IT and OT components, systems, and functions that involve multiple and diverse communication paths that are technologically and operationally evolving along with credible cyber security threats. These cyber security threats and risks as well as a number of known security breach scenarios are described in this paper to highlight the evolution of cyber physical systems in the maritime domain and their emerging cyber vulnerabilities. Current industry and governmental standards and directives related to cyber security in the maritime domain attempt to enforce the regulatory compliance and reinforce asset cyber security integrity for optimum and safe performance with limited focus, however, in the existing OT infrastructure and systems. The use of outside-of-the-maritime industry security risk assessment tools and processes, such the API STD 780 Security Risk Assessment (SRA) and the Bow Tie Analysis methodologies, can assist the asset owner to assess its IT and OT infrastructure for cyber and physical security vulnerabilities and allocate proper mitigation measures assuming their similarities to ICS infrastructure. The application of cyber security controls deriving from the adaptation of the NIST CSF and the MITRE ATT&CK Threat Model can further increase the cyber security integrity of maritime assets, assuming they are periodically evaluated for their effectiveness and applicability. Finally, the improvement in communication among stakeholders, the increase in operational and technical cyber and physical security resiliency, and the increase in operational cyber security awareness would be further increased for maritime assets by the convergence of the distinct physical and cyber security functions as well as onshore- and offshore-based cyber infrastructure of maritime companies and asset owners.

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EKEvanthia Kostidi
Evanthia Kostidi
Nikitas NikitakosNikitas Nikitakos
Nikitas Nikitakos
Iosif ProgoulakisIosif Progoulakis
Iosif Progoulakis
3D printing or additive manufacturing (AM) (in the industrial context) is an innovative, as opposed to subtractive, technology, bringing new opportunities and benefits to the spare part supply chain (SPSC). The aim of this work is to capture the views of the stakeholders at the end of the chain, extruding factors that will benefit the end-user and the factors that are likely to be an obstacle, by employing the questionnaire method. Company objectives regarding spares (cost reductions, improvement of services, space reduction) have been prioritized differently by the stakeholders. The most important barriers according to the participants are the quality assurance of the spare parts made by the new technology followed by the know-how and skills of staff. Other views such as suitable parts are suggested. The practical value of this work, in addition to assessing the readiness of the industry, is that it provides guidance for the successful implementation of AM in the maritime industry.

13 January 2020 in WMU Journal of Maritime Affairs
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GTG. Tsaganos
G. Tsaganos
Nikitas NikitakosNikitas Nikitakos
Nikitas Nikitakos
DimitriosDalaklis DalaklisDimitriosDalaklis Dalaklis
DimitriosDalaklis Dalaklis
AÖAykut I. Ölcer
Aykut I. Ölcer
DPD. Papachristos
D. Papachristos

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Iosif ProgoulakisIosif Progoulakis
Iosif Progoulakis
Nikitas NikitakosNikitas Nikitakos
Nikitas Nikitakos
PRPaul Rohmeyer
Paul Rohmeyer
BBBarry Bunin
Barry Bunin
DimitriosDalaklis DalaklisDimitriosDalaklis Dalaklis
DimitriosDalaklis Dalaklis
Stavros KaramperidisStavros Karamperidis
Stavros Karamperidis
In an ever-evolving technological industry, the oil and gas sector is already moving forward through the adaptation of Industry 4.0 and the adaptation of advanced cyber technologies through Oil and Gas 4.0. As IT/OT (information technology/operational technology) systems are evolving technologically, so are the cyber security threats faced by the offshore oil and gas assets. This paper aims to raise the awareness of cyber security threats and the organizational and technical measures that need to be adopted by the oil and gas industry for remote and complex assets in the upstream sector. A comprehensive literature review covering the areas of new IT/OT systems integration and cyber security risk analysis and management is presented. The results of a survey on the subject of cyber security for offshore oil and gas assets are also presented, and they provide valuable insight into the current industry culture and the perception of cyber security concepts. The importance of organizational culture, personnel training and involvement, as well as corporate engagement and support in the subject of cyber security is highlighted.


2 January 2023 in Journal of International Maritime Safety, Environmental Affairs, and Shipping
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PKPavel Kovalishin
Pavel Kovalishin
Nikitas NikitakosNikitas Nikitakos
Nikitas Nikitakos
BSBoris Svilicic
Boris Svilicic
JZJinnan Zhang
Jinnan Zhang
ANAndrey Nikishin
Andrey Nikishin
ASAfrokomi-Afroula Stefanakou
Afrokomi-Afroula Stefanakou
Marine ports operations are often associated with a variety of externalities, including issues like air pollution and noise, among others; there is clearly a negative impact on the working environment and the quality of life of the citizens living next to a port. An effective way to improve the overall situation can be provided by deploying the shore-to-ship electrification method, also known as Cold Ironing. Unfortunately, there is still a disadvantage: there is no holistic approach involved, as the external electrical grid is usually powered by fossil fuels. In a different approach, the zero-emissions port concept uses a smart grid technology framework connected to renewable energy sources and the electrical grid is used only as a backup source in a situation where there is a deficit in power balance. However, an important challenge remains, the conversion to electricity and the efficiency of the converting systems. The use of such sources for commercial electrical supply is only possible with the new “Smart Grid” concept and the use of artificial intelligence (AI). In this paper, an overview of AI methods for smart grid energy management optimization for ports is presented, discussing the potential application of each algorithm to zero-emission port concepts.