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Search results for: resilience

Search results for: resilience

  • Disciplines and measures of information resilience

    Publication
    • J. Rak
    • M. Jonsson
    • D. Hutchison
    • J. Sterbenz

    - Year 2017

    Communication networks have become a fundamental part of many critical infrastructures, playing an important role in information delivery in various failure scenarios triggered e.g., by forces of nature (including earthquakes, tornados, fires, etc.), technology-related disasters (for instance due to power blackout), or malicious human activities. A number of recovery schemes have been defined in the context of network resilience...

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  • Organizational Resilience in Hospitality and Tourism

    Publication
    • M. Rozkwitalska-Welenc
    • J. Borzyszkowski,
    • B. Basińska
    • F. Okumus
    • O. M. Karatepe

    - Year 2024

    Although ‘VUCA’ is not a new term, the features of the world it describes, a volatile, uncertain, complex and ambiguous environment, have never been more valid. The VUCA world has become the new reality for business, specifically for hospitality and tourism organizations that are more vulnerable than any other sector due to the historically-recognized turbulent environment in which they operate. In this book, the authors present...

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  • Resilience and Security in Software Defined Networking

    Publication
    • C. Mas Machuca
    • P. Vizarreta
    • R. Durner
    • J. Rak

    - Year 2018

    This paper gives an overview of the most important issues on resilience and security in Software Defined Networking

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  • eFRADIR: An Enhanced FRAmework for DIsaster Resilience

    Publication
    • A. Pasic
    • R. Girao-Silva
    • F. Mogyorosi
    • B. Vass
    • T. Gomes
    • P. Babarczi
    • P. Revisnyei
    • J. Tapolcai
    • J. Rak

    - IEEE Access - Year 2021

    This paper focuses on how to increase the availability of a backbone network with minimal cost. In particular, the new framework focuses on resilience against natural disasters and is an evolution of the FRADIR/FRADIR-II framework. It targets three different directions, namely: network planning, failure modeling, and survivable routing. The steady state network planning is tackled by upgrading a sub-network (a set of links termed...

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  • Service-based Resilience for Embedded IoT Networks

    Publication

    - Year 2020

    Embedded IoT networks are the backbone of safety-critical systems like smart factories, autonomous vehicles, and airplanes. Therefore, resilience against failures and attacks should be a prior concern already in their design stage. In this study, we introduce a service-based network model as an MILP optimization problem for the efficient deployment of a service overlay to the embedded network by meeting QoS and resilience requirements....

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  • On the Importance of Resilience Engineering for Networked Systems in a Changing World

    Publication
    • D. Hutchison
    • D. Pezaros
    • J. Rak
    • P. Smith

    - IEEE COMMUNICATIONS MAGAZINE - Year 2023

    Resilience is featured increasingly often in the media, usually applied to society when faced, for example, with disasters such as flooding and the enormous challenges that the Covid-19 pandemic posed. There are now many resilience-related discussion groups worldwide, and some standards initiatives devoted in particular to city resilience. However, there is relatively little explicit interest in resilience engineering for communication...

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  • Resilience of 5G Mobile Communication Systems to Massive Disruptions

    Publication

    - Year 2020

    This chapter discusses vital techniques to enhance the resilience of 5G systems. It starts with dependability assessment of 5G networks. Next, it describes (a) the frequency fallback technique to improve availability and survivability of 5G services, (b) segment interleaving scheme to enhance communications resilience between base stations and the remaining part of the network and (c) multi-operator protection to address the resilience...

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  • Optimization of Wireless Networks for Resilience to Adverse Weather Conditions

    Publication
    • M. Pióro
    • E. Fitzgerald
    • I. Kalesnikau
    • D. Nace
    • J. Rak

    - Year 2020

    In this chapter, we consider how adverse weather conditions such as rain or fog affect the performance of wireless networks, and how to optimize these networks so as to make them robust to these conditions. We first show how to analyze the weather conditions in order to make them useful for network optimization modelling. Using an example realistic network, we show how to optimize two types of wireless networks: free-space optical...

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  • Information-driven network resilience: Research challenges and perspectives

    Publication
    • J. Rak
    • D. Papadimitriou
    • H. Niedermayer
    • P. Romero

    - Optical Switching and Networking - Year 2017

    Internet designed over 40 years ago was originally focused on host-to-host message delivery in a best-effort manner. However, introduction of new applications over the years have brought about new requirements related with throughput, scalability, mobility, security, connectivity, and availability among others. Additionally, convergence of telecommunications, media, and information technology was responsible for transformation...

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  • Fundamentals of Communication Networks Resilience to Disasters and Massive Disruptions

    Publication
    • J. Rak
    • D. Hutchison
    • J. Tapolcai
    • R. Bruzgiene
    • M. Tornatore
    • C. Mas-Machuca
    • M. Furdek
    • P. Smith

    - Year 2020

    Communication networks are exposed to a variety of massive failure events following from activities of nature, weather-induced disruptions, technology-implied problems, and malicious human activities. In this chapter, we first highlight the characteristics of these scenarios and discuss example failure events reported during the last three decades. Next, we explain the concept of network resilience and present an overview of major...

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  • Enhancing Resilience of FSO Networks to Adverse Weather Conditions

    Publication

    - IEEE Access - Year 2021

    Optical wireless networks realized by means of gigabit optical wireless communication (OWC) systems are becoming, in a variety of applications, an important alternative, or a complementary solution, to their fiber-based counterparts. However, performance of the OWC systems can be considerably degraded in periods of unfavorable weather conditions, such as heavy fog, which temporarily reduce the effective capacity of the network....

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  • Quality of Resilience in IP-based Future Internet Communications

    Publication

    - Year 2011

    Internet Przyszłości (zwany również Internetem 3.0 czy też NGN) jest następnym krokiem ewolucji Internetu. Prace badawcze związane z nową architekturą obejmują szerokie spektrum zagadnień, a zwłaszcza: architekturę sieci (protokoły), technologie sieciowe, aplikacje, itd. W tym artykule zakładamy wykorzystanie koncepcji Differentiated Services (DiffServ). W szczególności, proponujemy podejście ochrony zróżnicowanej ruchu. Jest ono...

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  • Journal of Safety Science and Resilience

    Journals

    ISSN: 2096-7527 , eISSN: 2666-4496

  • Disaster Resilience of Optical Networks: State of the Art, Challenges, and Opportunities

    Publication
    • J. Rak
    • R. Girão-Silva
    • T. Gomes
    • G. Ellinas
    • B. Kantarci
    • M. Tornatore

    - Optical Switching and Networking - Year 2021

    For several decades, optical networks, due to their high capacity and long-distance transmission range, have been used as the major communication technology to serve network traffic, especially in the core and metro segments of communication networks. Unfortunately, our society has often experienced how the correct functioning of these critical infrastructures can be substantially hindered by massive failures triggered by natural...

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  • Interdependence between Power Grids and Communication Networks: A Resilience Perspective

    Publication
    • L. Martins
    • R. Girao-Silva
    • L. Jorge
    • A. Gomes
    • F. Musumeci
    • J. Rak

    - Year 2017

    Power network resilience is increasingly dependent on communication networks. Besides traditional generation, power networks need to accommodate increasingly high penetration levels of dispersed micro generation, mostly based on renewable sources, and increasing and challenging demand, such as electric vehicles. At the same time the deployment of enabling technologies throughout the power grid makes available new demand resources...

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  • Evaluating Security and Resilience of Critical Networked Infrastructures after Stuxnet

    Publication

    - Year 2013

    The chapter presents the current configuration of the simulation environment for the evaluations of the security and resilience of critical networked infrastructures, which enables simulations of Stuxnet-like attacks. The configuration includes new features added to the MAlSim - Mobile Agent Malware Simulator after the advent of Stuxnet in reference to the experiments aiming at the security evaluation of a power plant which we...

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  • Assessment of Connectivity-based Resilience to Attacks Against Multiple Nodes in SDNs

    Publication
    • D. Santos
    • A. de Sousa
    • C. Mas-Machuca
    • J. Rak

    - IEEE Access - Year 2021

    In Software Defined Networks (SDNs), the control plane of a network is decoupled from its data plane. For scalability and robustness, the logically centralized control plane is implemented by physically placing different controllers throughout the network. The determination of the number and placement of controllers is known as the Controller Placement Problem (CPP). In the regular (i.e., failure-free) state, the control plane...

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  • The effect of environmental turbulence on cyber security risk management and organizational resilience

    Publication

    - COMPUTERS & SECURITY - Year 2024

    Even though there is a plethora of research on the role of environmental turbulence in organizational performance in general, little attention has been paid to the effect of environmental turbulence on cyber security risk management and further - organizational resilience. Drawing on the resource-based view and contingency theory, this study investigates how technological and market turbulence influence organizational cyber security...

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  • City scan as a tool to assess resilience challenges and vulnerabilities at the community level

    Publication

    - Year 2021

    The majority of the world’s population lives in cities and cities are the key to achieving resilience. Local governments own only part of the land and can only partially decide about measures that should be taken ‘on the ground’. Local governments are therefore highly dependent on individuals, communities, and businesses to adapt and transform and take action in their own backyards or neighbourhoods. Since, for many people, climate...

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  • Resilience-International Policies Practices and Discourses

    Journals

    ISSN: 2169-3293 , eISSN: 2169-3307

  • Service-based Resilience via Shared Protection in Mission-critical Embedded Networks

    Publication

    - IEEE Transactions on Network and Service Management - Year 2021

    Mission-critical networks, which for example can be found in autonomous cars and avionics, are complex systems with a multitude of interconnected embedded nodes and various service demands. Their resilience against failures and attacks is a crucial property and has to be already considered in their design phase. In this paper, we introduce a novel approach for optimal joint service allocation and routing, leveraging virtualized...

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  • A repeated game formulation of network embedded coding for multicast resilience in extreme conditions

    Publication
    • C. Esposito
    • A. Castiglione
    • F. Palmieri
    • F. Pop
    • J. Rak

    - Year 2017

    Computer networks and data sharing applications are vital for our current society and fundamental for any available ICT solution, so that networking is considered as one of the key critical infrastructures and its correct behavior should be always enforced, even in case of disasters or severe execution conditions. Resilience is a strongly demanding nonfunctional requirement for current computer networks, and one of the key factors...

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  • Resilience through multicast – An optimization model for multi-hop wireless sensor networks

    Publication

    - Ad Hoc Networks - Year 2020

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  • Throughput vs. Resilience in Multi-hop Wireless Sensor Networks with Periodic Packet Traffic

    Publication

    - Year 2020

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  • International Journal of Disaster Resilience in the Built Environment

    Journals

    ISSN: 1759-5908 , eISSN: 1759-5916

  • A novel genetic approach to provide differentiated levels of service resilience in IP-MPLS/WDM networks

    This paper introduces a novel class-based method of survivable routing for connection-oriented IP-MPLS/WDM networks, called MLS-GEN-H. The algorithm is designed to provide differentiated levels of service survivability in order to respond to varying requirements of end-users. It divides the complex problem of survivable routing in IP-MPLS/WDM networks into two subproblems, one for each network layer, which enables finding the...

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  • Maximizing SDN resilience to node‐targeted attacks through joint optimization of the primary and backup controllers placements

    Publication
    • M. Pióro
    • M. Mycek
    • A. Tomaszewski
    • A. de Sousa

    - NETWORKS - Year 2024

    In Software Defined Networks (SDN) packet data switches are configured by a limited number of SDN controllers, which respond to queries for packet forwarding decisions from the switches. To enable optimal control of switches in real time the placement of controllers at network nodes must guarantee that the controller-to-controller and switch-to-controller communications delays are bounded. Apart from the primary controllers that...

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  • RNDM 2016 Workshop and 2nd Meeting of COST CA15127-RECODIS: Highlights from the Resilience Week in Halmstad, Sweden

    Publication
    • M. Jonsson
    • J. Rak
    • D. Papadimitriou
    • A. Somani

    - IEEE COMMUNICATIONS MAGAZINE - Year 2017

    Leading network resilience researchers took part in the Resilience Week on Sept. 12-15, 2016 at Halmstad University, SE by Prof. Magnus Jonsson from the Centre for Research on Embedded Systems (CERES), Halmstad University, SE, and Prof. Jacek Rak from Gdansk University of Technology, PL. It included two major events: - The 2nd Meeting of COST CA15127–RECODIS Action (Resilient Communication Services Protecting End-user Applications...

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  • Konferencja HER CITY: Housing – Environment – Resilience

    Events

    09-10-2019 13:00 - 09-10-2019 18:30

    Zorganizowana przez Politechnikę Gdańską oraz amerykański Program SPURS DUSP MIT. Organizowane wydarzenie ma na celu podkreślenie znaczenia i roli planowania urbanistycznego w budowaniu wielowymiarowej demokracji.

  • Disaster-resilient communication networks: Principles and best practices

    Publication
    • A. Mauthe
    • D. Hutchison
    • E. Cetinkaya
    • I. Ganchev
    • J. Rak
    • J. P. Sterbenz
    • M. Gunkelk
    • P. Smith
    • T. Gomes

    - Year 2016

    Communication network failures that are caused by disasters, such as hurricanes, arthquakes and cyber-attacks, can have significant economic and societal impact. To address this problem, the research community has been investigating approaches to network resilience for several years. However, aside from well-established techniques, many of these solutions have not found their way into operational...

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  • Tomasz Janowski dr

    Tomasz Janowski is the Head of the Department of Informatics in Management, Faculty of Management and Economics, Gdańsk University of Technology, Poland; Invited Professor at the Department for E-Governance and Administration, Faculty of Business and Globalization, University for Continuing Education Krems, Austria; and Co-Editor-in-Chief of Government Information Quarterly, Elsevier. Previously, he was the first and founding Head...

  • Striving for spatial energy efficiency in dwelling complexes. Kształtowanie przestrzennej efektywności energetycznej w zespołach zabudowy mieszkaniowej.

    The main aim of this article was to discover the key characteristics in shaping most rewarded eco- district complexes built respectively in temperate climate zone in respect to spatial energy efficiency and resilience principles. It was done through careful case studies, comparative analysis and juxtaposition of critical parameters related to spatial energy efficiency and resilience in chosen representative dwelling complexes....

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  • Rural Design Lectures

    e-Learning Courses
    • P. Duch-Żebrowska
    • K. Zielonko-Jung

    The lectures are aiming to provide the students with the general understanding of the vernacular architecture, landscape, future, resilience and history.

  • Theory of Rural Design 2023

    e-Learning Courses
    • P. Duch-Żebrowska

    The lectures are aiming to provide the students with the general understanding of the vernacular architecture, landscape, future, resilience and history.

  • Michał Wróbel dr inż.

    Michał Wróbel, Assistant Professor of Gdańsk University of Technology, computer scientist, a specialist in software engineering. I graduated from the Faculty of Electronics Technical University of Gdansk in 2002 with a degree in Computer Science, with specialization in Software Engineering and Databases. Until 2006 I worked as system administrator in several companies, including CI TASK. Since 2006 I have been working at the Faculty...

  • Future research directions in design of reliable communication systems

    Publication
    • J. Rak
    • M. Pickavet
    • K. S. Trivedi
    • J. A. Lopez
    • A. M. C. A. Koster
    • J. P. Sterbenz
    • E. Çetinkaya
    • T. Gomes
    • M. Gunkel
    • K. Walkowiak
    • D. Staessens

    - TELECOMMUNICATION SYSTEMS - Year 2015

    In this position paper on reliable networks, we discuss new trends in the design of reliable communication systems. We focus on a wide range of research directions including protection against software failures as well as failures of communication systems equipment. In particular, we outline future research trends in software failure mitigation, reliability of wireless communications, robust optimization and network design, multilevel...

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  • Effect of kenaf fibre modification on morphology and mechanical properties of thermoplastic polyurethane materials

    The presented study examined the morphology and mechanical properties of biocomposites obtained from kenaf natural fibre and thermoplastic polyurethane. Kenaf was modified using various methods, namely: acetylation, blocked isocyanate, maleic anhydride and permanganate treatment. Those methods and ways of carrying out of surface modifications were not studied before on kenaf/thermoplastic polyurethane composites. Different fibre...

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  • Improving the Survivability of Carrier Networks to Large-Scale Disasters

    Publication
    • A. de Sousa
    • J. Rak
    • F. Barbosa
    • D. Santos
    • D. Mehta

    - Year 2020

    This chapter is dedicated to the description of methods aiming to improve the survivability of carrier networks to large-scale disasters. First, a disaster classification and associated risk analysis is described, and the disaster-aware submarine fibre-optic cable deployment is addressed aiming to minimize the expected costs in case of natural disasters. Then, the chapter addresses the improvement of the network connectivity resilience...

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  • Wpływ technicznych włókien celulozowych na wybrane właściwości kompozytów kauczuku naturalnego

    Publication

    - Elastomery - Year 2018

    Celem niniejszej pracy było zbadanie wpływu technicznych włókien celulozowych (dodanych w ilości 10, 20, 30 i 40 phr) jako naturalnego napełniacza na wybrane właściwości kompozytów na osnowie kauczuku naturalnego. Zbadano właściwości wulkanizatów przy statycznym rozciąganiu, w próbie rozdzierności, a także twardość, elastyczność przy odbiciu oraz ścieralność otrzymanych materiałów. Wyniki badań zostały porównane z wulkanizatem...

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  • Emotional distress, burnout and sense of safety during the COVID-19 pandemic in teachers after the reopening of schools

    Publication
    • D. Pankowski
    • E. Pisula
    • K. Wytrychiewicz-Pankowska
    • I. Nowakowska
    • A. Banasiak
    • M. Markiewicz
    • A. Jórczak-Kopeć

    - Advances in Cognitive Psychology - Year 2023

    The COVID-19 pandemic is having a significant impact on people's psychological well-being and mental health. This study aimed to identify factors linked to emotional distress, burnout and sense of safety in teachers related to the reopening of Polish schools after lockdown, remote work, and the holiday period between March and August 2020. A total of 1,286 teachers from different educational institutions participated in the...

  • Should Polish banks be domesticated?

    Publication

    - Year 2013

    The financial crisis revealed vulnerabilities in the regulation and supervision of the banking system. The overarching goal of the proposal (Bazylea III and CRD IV) is to strengthen the resilience of the EU banking sector. The effects of these regulations will be detrimental to the Polish banking system and economy. This follows from the fact that listed banks in Poland are subsidiaries of international banking groups. The article...

  • Karolina Krośnicka dr hab. inż. arch.

    Karolina A. Krośnicka, Ph.D., D.Sc., Eng. Arch., is associated professor at Department of Urban Design and Regional Planning, Faculty of Architecture, Gdańsk University of Technology (Poland).  For many years (1998 – 2016) she was employed at the Department of Transport and Logistics at the Faculty of Navigation at Gdynia Maritime University (Gdynia, Poland), where she was mostly involved in issues connected with seaports and port...

  • Enhancing Availability for Critical Services

    Publication
    • T. Gomes
    • L. Martins
    • R. Girão-Silva
    • D. Tipper
    • A. Pašić
    • B. Vass
    • L. Garrote
    • U. J. Nunes
    • M. Zachariasen
    • J. Rak

    - Year 2020

    Traditional approaches to provide classes of resilient service take the physical network availability as an input and then deploy redundancy and restoration techniques at various layers, often without full knowledge of mappings between layers. This makes it hard (and often inefficient) to ensure the high availability required by critical services which are typically a small fraction of the total traffic. Here, the innovative technique...

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  • Rotational Molding of Linear Low-Density Polyethylene Composites Filled with Wheat Bran

    Publication

    - Polymers - Year 2020

    Application of lignocellulosic fillers in the manufacturing of wood polymer composites (WPCs) is a very popular trend of research, however it is still rarely observed in the case of rotational molding. The present study aimed to analyze the impact of wheat bran content (from 2.5 wt.% to 20 wt.%) on the performance of rotationally-molded composites based on a linear low-density polyethylene (LLDPE) matrix. Microscopic structure...

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  • Developing Polycentricity to Shape Resilient Metropolitan Structures: The Case of the Gdansk–Gdynia–Sopot Metropolitan Area

    Publication

    Making the metropolitan area resilient, in many cases, calls for amending its spatial structures. This may take various forms, including both reshaping the metropolitan core and redeveloping the entire regional network of cities and centres, making them part of a coherent structure. The latter strategy is associated with reinforcing secondary urban centres as well as shaping new connections between them. In this case, the term...

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  • A study on fibre-reinforced concrete elements properties based on the case of habitat modules in the underwater sills

    Hydrotechnical constructions are mostly objects functioning in extreme conditions and requiring a custom-made construction project. In the case of using prefabricated elements, it is required to develop production, transport, assembly, conservation and repair technology. Concerning the problem of concrete cracks, modern repair systems allow positive effects to be achieved in many cases of concrete elements repair. In this work...

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  • Mechanical and thermo-mechanical properties of natural rubber composites filled with submicron- and nano-sized silica particles and prepared using glycolysate as a plasticizer

    Publication

    The main aim of this work was to examine the selected mechanical and thermo-mechanical properties of natural rubber/silica composites prepared using glycolysate as a plasticizer. Prepared composites contained different amounts of submicron- (10, 15, 20 or 25 pphr) or nano-particles (0.5, 0.75, 1.0 or 1.25 pphr). The tensile properties, tear resistance, hardness, abrasion resistance and resilience of prepared materials were determined....

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  • Design of Resilient Vehicle-to-Infrastructure Systems

    Publication

    - Year 2020

    Vehicular ad hoc networks (VANETs) have recently gained noticeable attention due to advantages in improving road traffic safety, shaping the road traffic and providing infotainment opportunities to travellers. However, transmission characteristics following from the IEEE 802.11p standard and the high mobility of VANET nodes remarkably reduce the lifetime, reach and capacity of wireless links, and often lead to simultaneous disruptions...

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  • Assessment of Alterations in Settlement Patterns of Agricultural Landscape in the Example of Kashubia in Poland

    Publication

    - Sustainability - Year 2024

    Traditional agricultural landscapes are heavily exposed to change due to their relatively low agricultural productivity. However, they represent cultural values of great importance in maintaining the resilience of the environment and society. Although their cultural potential is important for sustainable development, it is still insufficiently recognized. The article fills this gap by examining old farmstead buildings as a distinguishing...

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  • How non-technological innovation saved the day by using ICT

    Publication

    - Year 2022

    Certainly, the current pandemic situation provides a lot of evidence of the need for non-technological innovations, both in the area of company organization and marketing. Socio-cultural innovations are not less important. Therefore, the role of non-technological innovation during the COVID-19 pandemic is discussed in the sixth chapter. Innovations supported by digital solutions have become a silent heroes for many companies as...

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