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Stavropoulou G, Tsitseklis K, Mavraidi L, Chang KI, Zafeiropoulos A, Karyotis V, Papavassiliou S. Digital Twin Meets Knowledge Graph for Intelligent Manufacturing Processes. Sensors (Basel) 2024; 24:2618. [PMID: 38676238 PMCID: PMC11054090 DOI: 10.3390/s24082618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024]
Abstract
In the highly competitive field of material manufacturing, stakeholders strive for the increased quality of the end products, reduced cost of operation, and the timely completion of their business processes. Digital twin (DT) technologies are considered major enablers that can be deployed to assist the development and effective provision of manufacturing processes. Additionally, knowledge graphs (KG) have emerged as efficient tools in the industrial domain and are able to efficiently represent data from various disciplines in a structured manner while also supporting advanced analytics. This paper proposes a solution that integrates a KG and DTs. Through this synergy, we aimed to develop highly autonomous and flexible DTs that utilize the semantic knowledge stored in the KG to better support advanced functionalities. The developed KG stores information about materials and their properties and details about the processes in which they are involved, following a flexible schema that is not domain specific. The DT comprises smaller Virtual Objects (VOs), each one acting as an abstraction of a single step of the Industrial Business Process (IBP), providing the necessary functionalities that simulate the corresponding real-world process. By executing appropriate queries to the KG, the DT can orchestrate the operation of the VOs and their physical counterparts and configure their parameters accordingly, in this way increasing its self-awareness. In this article, the architecture of such a solution is presented and its application in a real laser glass bending process is showcased.
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Affiliation(s)
- Georgia Stavropoulou
- School of Electrical and Computer Engineering, National Technical University of Athens, 157 80 Athens, Greece; (G.S.); (K.T.); (L.M.); (S.P.)
| | - Konstantinos Tsitseklis
- School of Electrical and Computer Engineering, National Technical University of Athens, 157 80 Athens, Greece; (G.S.); (K.T.); (L.M.); (S.P.)
| | - Lydia Mavraidi
- School of Electrical and Computer Engineering, National Technical University of Athens, 157 80 Athens, Greece; (G.S.); (K.T.); (L.M.); (S.P.)
| | - Kuo-I Chang
- Fraunhofer Institute for Mechanics of Materials IWM, 79108 Freiburg, Germany;
| | - Anastasios Zafeiropoulos
- School of Electrical and Computer Engineering, National Technical University of Athens, 157 80 Athens, Greece; (G.S.); (K.T.); (L.M.); (S.P.)
| | | | - Symeon Papavassiliou
- School of Electrical and Computer Engineering, National Technical University of Athens, 157 80 Athens, Greece; (G.S.); (K.T.); (L.M.); (S.P.)
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Fotopoulou E, Zafeiropoulos A, Papavassiliou S. EmoSocio: An open access sociometry-enriched Emotional Intelligence model. Current Research in Behavioral Sciences 2021. [DOI: 10.1016/j.crbeha.2021.100015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Puliafito A, Tricomi G, Zafeiropoulos A, Papavassiliou S. Smart Cities of the Future as Cyber Physical Systems: Challenges and Enabling Technologies. Sensors (Basel) 2021; 21:s21103349. [PMID: 34066019 PMCID: PMC8151438 DOI: 10.3390/s21103349] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/19/2021] [Accepted: 05/01/2021] [Indexed: 11/16/2022]
Abstract
A smart city represents an improvement of today's cities, both functionally and structurally, that strategically utilizes several smart factors, capitalizing on Information and Communications Technology (ICT) to increase the city's sustainable growth and strengthen the city's functions, while ensuring the citizens' enhanced quality of life and health. Cities can be viewed as a microcosm of interconnected "objects" with which citizens interact daily, which represents an extremely interesting example of a cyber physical system (CPS), where the continuous monitoring of a city's status occurs through sensors and processors applied within the real-world infrastructure. Each object in a city can be both the collector and distributor of information regarding mobility, energy consumption, air pollution as well as potentially offering cultural and tourist information. As a consequence, the cyber and real worlds are strongly linked and interdependent in a smart city. New services can be deployed when needed, and evaluation mechanisms can be set up to assess the health and success of a smart city. In particular, the objectives of creating ICT-enabled smart city environments target (but are not limited to) improved city services; optimized decision-making; the creation of smart urban infrastructures; the orchestration of cyber and physical resources; addressing challenging urban issues, such as environmental pollution, transportation management, energy usage and public health; the optimization of the use and benefits of next generation (5G and beyond) communication; the capitalization of social networks and their analysis; support for tactile internet applications; and the inspiration of urban citizens to improve their quality of life. However, the large scale deployment of cyber-physical-social systems faces a series of challenges and issues (e.g., energy efficiency requirements, architecture, protocol stack design, implementation, and security), which requires more smart sensing and computing methods as well as advanced networking and communications technologies to provide more pervasive cyber-physical-social services. In this paper, we discuss the challenges, the state-of-the-art, and the solutions to a set of currently unresolved key questions related to CPSs and smart cities.
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Affiliation(s)
- Antonio Puliafito
- Department of Engineering, University of Messina, 98100 Messina, Italy;
- Consorzio Interuniversitario Nazionale Informatica, 00185 Rome, Italy
- Correspondence: or ; Tel.: +39-348-6052885
| | - Giuseppe Tricomi
- Department of Engineering, University of Messina, 98100 Messina, Italy;
| | | | - Symeon Papavassiliou
- Zografou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.Z.); (S.P.)
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Tsoumas I, Symvoulidis C, Kyriazis D, Gouvas P, Zafeiropoulos A, Melian J, Sterle J. Modelling 5G Cloud-Native Applications by Exploiting the Service Mesh Paradigm. INFORM SYST 2020. [DOI: 10.1007/978-3-030-44322-1_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Fotopoulou E, Zafeiropoulos A, Terroso-Sáenz F, Şimşek U, González-Vidal A, Tsiolis G, Gouvas P, Liapis P, Fensel A, Skarmeta A. Providing Personalized Energy Management and Awareness Services for Energy Efficiency in Smart Buildings. Sensors (Basel) 2017; 17:s17092054. [PMID: 28880227 PMCID: PMC5620952 DOI: 10.3390/s17092054] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 08/31/2017] [Accepted: 09/05/2017] [Indexed: 11/16/2022]
Abstract
Considering that the largest part of end-use energy consumption worldwide is associated with the buildings sector, there is an inherent need for the conceptualization, specification, implementation, and instantiation of novel solutions in smart buildings, able to achieve significant reductions in energy consumption through the adoption of energy efficient techniques and the active engagement of the occupants. Towards the design of such solutions, the identification of the main energy consuming factors, trends, and patterns, along with the appropriate modeling and understanding of the occupants’ behavior and the potential for the adoption of environmentally-friendly lifestyle changes have to be realized. In the current article, an innovative energy-aware information technology (IT) ecosystem is presented, aiming to support the design and development of novel personalized energy management and awareness services that can lead to occupants’ behavioral change towards actions that can have a positive impact on energy efficiency. Novel information and communication technologies (ICT) are exploited towards this direction, related mainly to the evolution of the Internet of Things (IoT), data modeling, management and fusion, big data analytics, and personalized recommendation mechanisms. The combination of such technologies has resulted in an open and extensible architectural approach able to exploit in a homogeneous, efficient and scalable way the vast amount of energy, environmental, and behavioral data collected in energy efficiency campaigns and lead to the design of energy management and awareness services targeted to the occupants’ lifestyles. The overall layered architectural approach is detailed, including design and instantiation aspects based on the selection of set of available technologies and tools. Initial results from the usage of the proposed energy aware IT ecosystem in a pilot site at the University of Murcia are presented along with a set of identified open issues for future research.
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Affiliation(s)
- Eleni Fotopoulou
- Ubitech Ltd. Research and Development Department, Athens 15231, Greece.
| | | | - Fernando Terroso-Sáenz
- Departamento de Ingeniería de la Información y las Comunicaciones, Facultad de Informática, Universidad de Murcia, Murcia 30003, Spain.
| | - Umutcan Şimşek
- Semantic Technology Institute (STI) Innsbruck, University of Innsbruck, Innsbruck 6020, Austria.
| | - Aurora González-Vidal
- Departamento de Ingeniería de la Información y las Comunicaciones, Facultad de Informática, Universidad de Murcia, Murcia 30003, Spain.
| | - George Tsiolis
- Ubitech Ltd. Research and Development Department, Athens 15231, Greece.
| | - Panagiotis Gouvas
- Ubitech Ltd. Research and Development Department, Athens 15231, Greece.
| | - Paris Liapis
- Ubitech Ltd. Research and Development Department, Athens 15231, Greece.
| | - Anna Fensel
- Semantic Technology Institute (STI) Innsbruck, University of Innsbruck, Innsbruck 6020, Austria.
| | - Antonio Skarmeta
- Departamento de Ingeniería de la Información y las Comunicaciones, Facultad de Informática, Universidad de Murcia, Murcia 30003, Spain.
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Casale G, Chesta C, Deussen P, Di Nitto E, Gouvas P, Koussouris S, Stankovski V, Symeonidis A, Vlassiou V, Zafeiropoulos A, Zhao Z. Current and Future Challenges of Software Engineering for Services and Applications. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.procs.2016.08.278] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lederer CW, Basak AN, Aydinok Y, Christou S, El-Beshlawy A, Eleftheriou A, Fattoum S, Felice AE, Fibach E, Galanello R, Gambari R, Gavrila L, Giordano PC, Grosveld F, Hassapopoulou H, Hladka E, Kanavakis E, Locatelli F, Old J, Patrinos GP, Romeo G, Taher A, Traeger-Synodinos J, Vassiliou P, Villegas A, Voskaridou E, Wajcman H, Zafeiropoulos A, Kleanthous M. An electronic infrastructure for research and treatment of the thalassemias and other hemoglobinopathies: the Euro-mediterranean ITHANET project. Hemoglobin 2010; 33:163-76. [PMID: 19657830 DOI: 10.1080/03630260903089177] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hemoglobin (Hb) disorders are common, potentially lethal monogenic diseases, posing a global health challenge. With worldwide migration and intermixing of carriers, demanding flexible health planning and patient care, hemoglobinopathies may serve as a paradigm for the use of electronic infrastructure tools in the collection of data, the dissemination of knowledge, the harmonization of treatment, and the coordination of research and preventive programs. ITHANET, a network covering thalassemias and other hemoglobinopathies, comprises 26 organizations from 16 countries, including non-European countries of origin for these diseases (Egypt, Israel, Lebanon, Tunisia and Turkey). Using electronic infrastructure tools, ITHANET aims to strengthen cross-border communication and data transfer, cooperative research and treatment of thalassemia, and to improve support and information of those affected by hemoglobinopathies. Moreover, the consortium has established the ITHANET Portal, a novel web-based instrument for the dissemination of information on hemoglobinopathies to researchers, clinicians and patients. The ITHANET Portal is a growing public resource, providing forums for discussion and research coordination, and giving access to courses and databases organized by ITHANET partners. Already a popular repository for diagnostic protocols and news related to hemoglobinopathies, the ITHANET Portal also provides a searchable, extendable database of thalassemia mutations and associated background information. The experience of ITHANET is exemplary for a consortium bringing together disparate organizations from heterogeneous partner countries to face a common health challenge. The ITHANET Portal as a web-based tool born out of this experience amends some of the problems encountered and facilitates education and international exchange of data and expertise for hemoglobinopathies.
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Affiliation(s)
- Carsten W Lederer
- Molecular Genetics Thalassaemia Department, The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus.
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Zafeiropoulos A, Gouvas P, Liakopoulos A, Mentzas G, Mitrou N. NEURON: enabling autonomicity in wireless sensor networks. Sensors (Basel) 2010; 10:5233-62. [PMID: 22399931 PMCID: PMC3292171 DOI: 10.3390/s100505233] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Revised: 04/01/2010] [Accepted: 05/14/2010] [Indexed: 11/16/2022]
Abstract
Future Wireless Sensor Networks (WSNs) will be ubiquitous, large-scale networks interconnected with the existing IP infrastructure. Autonomic functionalities have to be designed in order to reduce the complexity of their operation and management, and support the dissemination of knowledge within a WSN. In this paper a novel protocol for energy efficient deployment, clustering and routing in WSNs is proposed that focuses on the incorporation of autonomic functionalities in the existing approaches. The design of the protocol facilitates the design of innovative applications and services that are based on overlay topologies created through cooperation among the sensor nodes.
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Affiliation(s)
- Anastasios Zafeiropoulos
- National Technical University of Athens, Heroon Polytexneiou, 15773, Zografou, Greece; E-Mails: (P.G.); (G.M.); (N.M.)
- Greek Research and Technology Network, Av. Mesogion 56, 11527, Athens, Greece; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +30-210-7474255; Fax: +30-210-7474490
| | - Panagiotis Gouvas
- National Technical University of Athens, Heroon Polytexneiou, 15773, Zografou, Greece; E-Mails: (P.G.); (G.M.); (N.M.)
| | | | - Gregoris Mentzas
- National Technical University of Athens, Heroon Polytexneiou, 15773, Zografou, Greece; E-Mails: (P.G.); (G.M.); (N.M.)
| | - Nikolas Mitrou
- National Technical University of Athens, Heroon Polytexneiou, 15773, Zografou, Greece; E-Mails: (P.G.); (G.M.); (N.M.)
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Logothetis L, Mylonas IA, Baloyannis S, Pashalidou M, Orologas A, Zafeiropoulos A, Kosta V, Theoharides TC. A pilot, open label, clinical trial using hydroxyzine in multiple sclerosis. Int J Immunopathol Pharmacol 2006; 18:771-8. [PMID: 16388727 DOI: 10.1177/039463200501800421] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Multiple sclerosis (MS) is an autoimmune disorder of myelin destruction. Blood-brain-barrier (BBB) disruption precedes pathological or clinical findings and could involve mediators from perivascular brain mast cells, such as histamine and vascular endothelial growth factor (VEGF). Mast cells could be activated by many triggers, including acute stress that has been correlated with MS exacerbations. We considered that the histamine-1 (H1) receptor antagonist hydroxyzine, which also partially inhibits brain mast cells and has anxiolytic properties, may reduce MS symptoms. This open label, pilot, clinical trial investigated the effect on MS of an oral solution of hydroxyzine (100 mg per day), together with caffeine (200 mg per day) to reduce sedation. Twenty patients (8 males; 12 females) with relapsing-remitting or relapsing-progressive MS completed the study (12 +/- 1 months) and were evaluated using disability scales. Most patients on hydroxyzine (75%) remained stable or improved neurologically and all but one showed improved mood. Hydroxyzine could be used as an adjuvant in MS, but the small number of patients enrolled and the short duration of the study precludes any definitive conclusions. A double-blind, placebo-controlled study is warranted.
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Affiliation(s)
- L Logothetis
- Department of Neurology, Aristotle University, AHEPA Hospital, Thessaloniki, Greece
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Bouriotis V, Zafeiropoulos A, Clonis YD. High-performance liquid chromatography for the purification of restriction endonucleases, application to BanII, SacI, and SphI. Anal Biochem 1987; 160:127-34. [PMID: 3032016 DOI: 10.1016/0003-2697(87)90622-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Conventional fractionation methods are time consuming, thus they prolong the time required to process low-stability restriction enzymes. We now report a rapid and effective two-step chromatographic method that affords high purity endonucleases in a short time. Accordingly, an inexpensive chromatographic adsorbent such as phosphocellulose or dyed agarose in the first step is coupled to a high-performance ion exchanger, namely, MonoQ, in the second step. The purification schemes reported here are now in routine use to prepare high-purity BanII, SacI, and SphI as judged by the "overdigestion" and "cut-ligate-recut" stringent quality tests.
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