Relevant bibliographies by topics / Open optical network

Academic literature on the topic 'Open optical network'

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Published: 14 March 2023

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Journal articles on the topic "Open optical network"

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Virgillito, Emanuele, Alessio Ferrari, Andrea D’Amico, and Vittorio Curri. "Statistical Assessment of Open Optical Networks." Photonics 6, no. 2 (June 5, 2019): 64. http://dx.doi.org/10.3390/photonics6020064.

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In order to cope with the increase of the final user traffic, operators and vendors are pushing towards physical layer aware networking as a way to maximize the network capacity. To this aim, optical networks are becoming more and more open by exposing physical parameters enabling fast and reliable estimation of the lightpath quality of transmission. This comes in handy not only from the point of view of the planning and managing of the optical paths but also on a more general picture of the whole optical network performance. In this work, the Statistical Network Assessment Process (SNAP) is presented. SNAP is an algorithm allowing for estimating different network metrics such as blocking probability or link saturation, by generating traffic requests on a graph abstraction of the physical layer. Being aware of the physical layer parameters and transceiver technologies enables assessing their impact on high level network figures of merit. Together with a detailed description of the algorithm, we present a comprehensive review of several results on the networking impact of multirate transceivers, flex-grid spectral allocation as a means to finely exploit lightpath capacity and of different Space Division Multiplexing (SDM) solutions.
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Kumar, Love, Amarpal Singh, and Vishal Sharma. "Analysis on multiple optical line terminal passive optical network based open access network." Frontiers of Optoelectronics 12, no. 2 (October 24, 2018): 208–14. http://dx.doi.org/10.1007/s12200-018-0767-3.

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Szyrkowiec, Thomas, Achim Autenrieth, and Wolfgang Kellerer. "Optical Network Models and Their Application to Software-Defined Network Management." International Journal of Optics 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5150219.

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Software-defined networking is finding its way into optical networks. Here, it promises a simplification and unification of network management for optical networks allowing automation of operational tasks despite the highly diverse and vendor-specific commercial systems and the complexity and analog nature of optical transmission. Common abstractions and interfaces are a fundamental component for software-defined optical networking. Currently, a number of models for optical networks are available. They all claim to provide open and vendor agnostic management of optical equipment. In this work, we survey and compare the most important models and propose an intent interface for creating virtual topologies which is integrated in the existing model ecosystem.
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Mustafa, Firas M. "Software Defined Networking Based Optical Network: A review." Academic Journal of Nawroz University 9, no. 2 (June 29, 2020): 139. http://dx.doi.org/10.25007/ajnu.v9n2a718.

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In the field of networking, software-defined networking (SDN) has obtained a lot of concentration from both academic and industry, and it aims to provide a flexible and programmable level of control, beside obtain efficient control and management of network systems. For such reasons, the software-defined networks (SDN) can be deemed as an essential task to accomplish these requirements. In the datacenters and networks, the SDN is used to allow the administrators of the networks to start programming, controlling, changing, and managing dynamically the network behavior with open interfaces and a reflection of lower-level functionality because the need for SDN-like switching technology has become evident for many users of network equipment, especially in large data centers. There are many algorithms and applications that have been considered in SDN such as (FP-MA), EON, (EQUAL-APP) (VONCR-APP), and (T-SDN) as use cases for approval purposes because the SDN provides several focal points to the power, operation, and administration of extensive range networks. This paper aims to review Optical Network using SDN, where many types of research papers are present techniques to improve near-optimal traffic engineering and management; measurement and monitoring of the significant parameters of the optical networks and manage the cross-layer issues such as debugging and testing.
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Romanov, O. I., I. V. Svyd, N. I. Korniienko, and A. O. Romanov. "Optical Network Management by ONOS-Based SDN Controller." Radiotekhnika, no. 210 (September 28, 2022): 188–96. http://dx.doi.org/10.30837/rt.2022.3.210.16.

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The possibilities to manage the optical network with a logically centralized SDN control plane based on the Open Network Operating System (ONOS) are investigated. The structure of the controller and its main functional blocks are considered ensuring the collection of information about the state of network elements, the solution of the main control tasks, interaction of control systems built on different technological bases, are considered. The role and place of the open network operating system in the controller structure are shown, the description of the ONOS multilevel architecture in the form of a set of functional modules is given, the purpose and functions of the ONOS subsystems are analyzed, protocols and interfaces making it possible to present the SDN network as a model are described. The peculiarity of the model is that the managed network can be represented as a set of virtual network functions. Therefore, the control process becomes independent of which vendor's equipment was used to build the network, as well as whether the network is built on real physical elements or virtual ones. Using the ONOS allows you to build a logical centralized control plane in the SDN networks. The existing set of functional modules, services and interfaces in the ONOS allows you to perform optical network management tasks. For the further development of the ONOS, it is necessary to develop mathematical models and methods for the optimal solution of control problems in various operating conditions, which will become application-level software modules in the future.
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Troscia, Martina, Andrea Sgambelluri, Francesco Paolucci, Piero Castoldi, Paolo Pagano, and Filippo Cugini. "Scalable OneM2M IoT Open-Source Platform Evaluated in an SDN Optical Network Controller Scenario." Sensors 22, no. 2 (January 7, 2022): 431. http://dx.doi.org/10.3390/s22020431.

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Software Defined Networking represents a mature technology for the control of optical networks, though all open controller implementations present in the literature still lack the adequate level of maturity and completeness to be considered for (pre)-production network deployments. This work aims at experimenting on, assessing and discussing the use of the OneM2M open-source platform in the context of optical networks. Network elements and devices are implemented as IoT devices, and the control application is built on top of an OneM2M-compliant server. The work concretely addresses the scalability and flexibility performances of the proposed solution, accounting for the expected growth of optical networks. The two experiment scenarios show promising results and confirm that the OneM2M platform can be adopted in such a context, paving the way to other researches and studies.
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Zhou, Wei, Xing Jiang, Qingsong Luo, Shanguo Huang, Bingli Guo, Xiang Sun, Shaobo Li, Xiaochuan Tan, Mingyi Ma, and Tianwen Fu. "Design and Implementation of Semi-Physical Platform for Label Based Frame Switching in Integrated Satellite Terrestrial Networks." Applied Sciences 12, no. 13 (July 1, 2022): 6674. http://dx.doi.org/10.3390/app12136674.

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With the explosion of traffic demand in recent years, the integration of satellite optical networks and terrestrial networks (ISTN) creates a promising networking solution for future low-latency, high-rate, and high-capacity communications. Owing to the high cost of deploying and maintaining a satellite optical network, it is critical to carefully design and plan the network to ensure the performance of the network. Thus, a semi-physical simulation platform based on software-defined networks (SDNs) is developed to simulate a satellite optical network and evaluate the performance of the proposed label-based advanced orbiting system (AOS) frame switching method that adheres to the Consultative Committee for Space Data Systems’ recommended standard (CCSDS). The semi-physical simulation platform has two major innovations: (1) adapting and integrating network protocols between the CCSDS and open system interconnect (OSI) reference models, particularly at the data link layer, and (2) the foundation for an SDN-based satellite optical network. In the control plane, real-time VxWorks Simulators serve as controllers to establish and manage various network protocols and the link manager protocol (LMP). Here, network protocols include open shortest path first (OSPF) for routing managing and controlling messages, constraint shortest path first–traffic engineering (CSPF-TE), and constraint-label distribution protocol (CR-LDP) for routing data services. LMP is used to assign and reserve satellite optical link resources. The performance of the architecture and protocols is evaluated via a semi-physical simulation platform.
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Nsafoa-Yeboah, Kenneth, Eric Tutu Tchao, Bright Yeboah-Akowuah, Benjamin Kommey, Andrew Selasi Agbemenu, Eliel Keelson, and Mohammad Monirujjaman Khan. "Software-Defined Networks for Optical Networks Using Flexible Orchestration: Advances, Challenges, and Opportunities." Journal of Computer Networks and Communications 2022 (August 4, 2022): 1–40. http://dx.doi.org/10.1155/2022/5037702.

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Optical networks offer a wide range of benefits to the telecommunication sector worldwide with their provision of higher bandwidth, which leads to faster data speed, longer transmission distance, and improved latency. Currently, the complexity associated with advancements in optical networks poses problems to network flexibility, reliability, and quality of service. Over the years, many reviews and proposals have been implemented by several literature studies to provide solutions for optical networks using software-defined networks and network service orchestrators. This study reviews the significant challenges in current optical network applications, the various solutions rendered by software-defined networks, and network service orchestration, impediments, and gaps in these software-defined networks. This study will go a step further to look into the various improvements and implementations of software-defined networks tailored to solve specific optical network problems. This study further proposes a flexible orchestration architecture for software-defined networks for solving flexibility and scalability problems in optical networks. This proposal uses an open network system (ONOS) SDN controller, leveraging on dockerisation and Kubernetes clusterisation and orchestration. This solution presents a more flexible, reliable, customable, and higher quality of service, which is an improvement upon current solutions in the literature.
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Casellas, Ramon, Alessio Giorgetti, Roberto Morro, Ricardo Martinez, Ricard Vilalta, and Raul Muñoz. "Virtualization of disaggregated optical networks with open data models in support of network slicing." Journal of Optical Communications and Networking 12, no. 2 (November 14, 2019): A144. http://dx.doi.org/10.1364/jocn.12.00a144.

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Ashraf, Muhammad, Sevia Idrus, Farabi Iqbal, Rizwan Butt, and Muhammad Faheem. "Disaster-Resilient Optical Network Survivability: A Comprehensive Survey." Photonics 5, no. 4 (October 12, 2018): 35. http://dx.doi.org/10.3390/photonics5040035.

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Network survivability endeavors to ensure the uninterrupted provisioning of services by the network operators in case of a disaster event. Studies and news reports show that network failures caused by physical attacks and natural disasters have significant impacts on the optical networks. Such network failures may lead to a section of a network to cease to function, resulting in non-availability of services and may increase the congestion within the rest of the network. Therefore, fault tolerant and disaster-resilient optical networks have grasped the attention of the research community and have been a critical concern in network studies during the last decade. Several studies on protection and restoration techniques have been conducted to address the network component failures. This study reviews related previous research studies to critically discuss the issues regarding protection, restoration, cascading failures, disaster-based failures, and congestion-aware routing. We have also focused on the problem of simultaneous cascading failures (which may disturb the data traffic within a layer or disrupt the services at upper layers) along with their mitigating techniques, and disaster-aware network survivability. Since traffic floods and network congestion are pertinent problems, they have therefore been discussed in a separate section. In the end, we have highlighted some open issues in the disaster-resilient network survivability for research challenges and discussed them along with their possible solutions.
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Dissertations / Theses on the topic "Open optical network"

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FERRARI, ALESSIO. "Physical layer aware open optical networking." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2957734.

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Manukulasuriya, Varuna. "Architecture and protocol for an infrared semi-permanent local network." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309515.

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Poudel, Sunil. "Study on Fault Detection andLocalization for Wave length Division Multiplexing Passive Optical Network." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129299.

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Wavelength division multiplexing passive optical network (WDM-PON) can meet growing bandwidth demand in access network by providing high bandwidth to the end users. Failure in the access network is becoming critical as a large volume of traffic might be affected. Therefore, an effective supervision mechanism to detect and localize the fault is required to shorten the service interruption time. Meanwhile, open access provides a certain freedom for end users to choose the service and hence boosts competition among service/network providers. On the other hand, to offer open access in WDM-PON could result in a substantial change on architectural design, e.g., multiple feeder fibers (FFs) instead of a single one may be required to connect different service/network providers. Consequently, the traditional supervision mechanisms don’t work properly in open WDM-PON. To fill in this gap, several fault supervision mechanisms to support open access in WDMPON are proposed in this thesis. They can be applied to both disjoint and co-located FF layout where the choice of providers is done through wavelength selection. The feasibility of such solutions has been validated by evaluating transmission performance. We have carried out simulations in VPItransmissionMaker for different deployment scenarios. The results have confirmed that no significant degradation of the transmission performance is introduced by the proposed monitoring schemes compared to the benchmark, where no any fault supervision method is implemented.
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VIRGILLITO, EMANUELE. "Observing and Modeling the Physical Layer Phenomena in Open Optical Systems for Network planning and management." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2945179.

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Kelso, Douglas Ross. "Open access to next generation broadband." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16612/1/Douglas_Kelso_Thesis.pdf.

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Wireline telecommunications infrastructure in the customer access network or CAN is undergoing a veritable technological and commercial revolution. The paired-copper CAN is being modernised with optical fibre deployed ever closer to customers, culminating soon with fibre-to-the-home networks or some variant thereof. Although bandwidth ceases to be a scarce commodity, the underlying natural monopoly will most likely be strengthened. National competition policy desires open access to multiple service providers yet commercial pressure calls for closure. This has been the recent experience with the hybrid fibre coaxial networks delivering pay television and Internet access. This research asks the question: What are the factors that prevent open access to the broadband services of next generation wireline infrastructure? How can these obstacles be overcome? A particular focus is given to non-price considerations which come to the fore due to the unique strategic and technological characteristics of optical fibre in the access network. The methodological approach involves data gathering via three case studies - that of the Telstra/Foxtel pay television network, the TransACT broadband network and fibre-to-the-home networks in general. Although the ultimate focus is on the research question above, these cases are discussed in a holistic way with consideration of a number of contextual factors. The research also examines the relationship between the concepts of 'open access' and 'network neutrality', visiting the concept of 'common carriage' in doing so. Several findings are reached that illuminate the field of telecommunications access regulation as applied to infrastructure capable of delivering truly next generation broadband services. Since 1993, our politicians have only paid lip service to the importance of competition and have deferred to the demands of the dominant builder of telecommunications infrastructure. From the viewpoints of end-users and access seekers, the access regime is found to be incapable of dealing with the technical and commercial bottlenecks arising from optical fibre in the CAN. It is concluded that communication between users should be recognised as the prime purpose of telecommunications and that the regulatory regime should not reward discriminatory practices detracting from the development of a networked information economy. It is also concluded that dominant players should never be rewarded with access holidays which could otherwise entrench market dominance through the creation of new bottlenecks. Access regulation is ill-equipped to cope with optical fibre in the CAN until it also recognizes the strategic potential of such infrastructure.
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Kelso, Douglas Ross. "Open access to next generation broadband." Queensland University of Technology, 2008. http://eprints.qut.edu.au/16612/.

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Wireline telecommunications infrastructure in the customer access network or CAN is undergoing a veritable technological and commercial revolution. The paired-copper CAN is being modernised with optical fibre deployed ever closer to customers, culminating soon with fibre-to-the-home networks or some variant thereof. Although bandwidth ceases to be a scarce commodity, the underlying natural monopoly will most likely be strengthened. National competition policy desires open access to multiple service providers yet commercial pressure calls for closure. This has been the recent experience with the hybrid fibre coaxial networks delivering pay television and Internet access. This research asks the question: What are the factors that prevent open access to the broadband services of next generation wireline infrastructure? How can these obstacles be overcome? A particular focus is given to non-price considerations which come to the fore due to the unique strategic and technological characteristics of optical fibre in the access network. The methodological approach involves data gathering via three case studies - that of the Telstra/Foxtel pay television network, the TransACT broadband network and fibre-to-the-home networks in general. Although the ultimate focus is on the research question above, these cases are discussed in a holistic way with consideration of a number of contextual factors. The research also examines the relationship between the concepts of 'open access' and 'network neutrality', visiting the concept of 'common carriage' in doing so. Several findings are reached that illuminate the field of telecommunications access regulation as applied to infrastructure capable of delivering truly next generation broadband services. Since 1993, our politicians have only paid lip service to the importance of competition and have deferred to the demands of the dominant builder of telecommunications infrastructure. From the viewpoints of end-users and access seekers, the access regime is found to be incapable of dealing with the technical and commercial bottlenecks arising from optical fibre in the CAN. It is concluded that communication between users should be recognised as the prime purpose of telecommunications and that the regulatory regime should not reward discriminatory practices detracting from the development of a networked information economy. It is also concluded that dominant players should never be rewarded with access holidays which could otherwise entrench market dominance through the creation of new bottlenecks. Access regulation is ill-equipped to cope with optical fibre in the CAN until it also recognizes the strategic potential of such infrastructure.
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Kelso, Ross. "Open access to next generation broadband." Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/12663/1/12663a.pdf.

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Wireline telecommunications infrastructure in the customer access network or CAN is undergoing a veritable technological and commercial revolution. The paired-copper CAN is being modernised with optical fibre deployed ever closer to customers, culminating soon with fibre-to-the-home networks or some variant thereof. Although bandwidth ceases to be a scarce commodity, the underlying natural monopoly will most likely be strengthened. National competition policy desires open access to multiple service providers yet commercial pressure calls for closure. This has been the recent experience with the hybrid fibre coaxial networks delivering pay television and Internet access. This research asks the question: What are the factors that prevent open access to the broadband services of next generation wireline infrastructure? How can these obstacles be overcome? A particular focus is given to non-price considerations which come to the fore due to the unique strategic and technological characteristics of optical fibre in the access network. The methodological approach involves data gathering via three case studies - that of the Telstra/Foxtel pay television network, the TransACT broadband network and fibre-to-the-home networks in general. Although the ultimate focus is on the research question above, these cases are discussed in a holistic way with consideration of a number of contextual factors. The research also examines the relationship between the concepts of ‘open access’ and ‘network neutrality’, visiting the concept of ‘common carriage’ in doing so. Several findings are reached that illuminate the field of telecommunications access regulation as applied to infrastructure capable of delivering truly next generation broadband services. Since 1993, our politicians have only paid lip service to the importance of competition and have deferred to the demands of the dominant builder of telecommunications infrastructure. From the viewpoints of end-users and access seekers, the access regime is found to be incapable of dealing with the technical and commercial bottlenecks arising from optical fibre in the CAN. It is concluded that communication between users should be recognised as the prime purpose of telecommunications and that the regulatory regime should not reward discriminatory practices detracting from the development of a networked information economy. It is also concluded that dominant players should never be rewarded with access holidays which could otherwise entrench market dominance through the creation of new bottlenecks. Access regulation is ill-equipped to cope with optical fibre in the CAN until it also recognizes the strategic potential of such infrastructure.
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KHAN, IHTESHAM. "Machine Learning for Multi-Layer Open and Disaggregated Optical Networks." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2964786.

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Martins, Pedro Miguel Marques. "Optical packet transport networks." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/16320.

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Mestrado em Engenharia Eletrónica e Telecomunicações
In this dissertation is performed a study of packet and circuit switch on optical transport networks, considering network nodes architecture specifications, functionalities and limitations. It is presented an optimization model for nodes dimensioning, considering network traffic requirements and associated costs, using integer linear programming (ILP) tools. To start, an analysis of the client signal is done, before it enters the optical domain, presenting the main protocols, procedures and transport containers for data. When in optical domain, various grooming configurations, considering client signals bit rate are analysed. Considering the node's architecture and transport modes, mathematical models capable to minimize the costs associated with the network nodes are developed for each considered architecture. Results for different simulation scenarios, continuously increasing network traffic are presented and discussed. This document is finalized with the main conclusions driven by techno-economic analysis.
Nesta dissertação é efetuado um estudo sobre comutação de pacotes e circuitos em redes de transporte óticas, considerando especificidades da arquitetura dos nós, funcionalidades e limitações. É apresentado um modelo de optimização para dimensionamento dos nós, considerando requisitos de tráfego da rede e custos associados, utilizando ferramentas de programação linear inteira (PLI). Analisando o sinal de cliente, antes de este entrar no domínio ótico, apresentando os principais protocolos, procedimentos e contentores para transporte de dados. No domínio ótico, diversas configurações de agregação são analisadas, considerando o bit rate dos sinais. Após análise da arquitetura dos nós e modos de transporte, desenvolve- -se um modelo matemático capaz de minimizar os custos associados aos nós da rede, para as arquiteturas consideradas. Os resultados dos diferentes cenários de simulação, com crescimento constante do tráfego são discutidos, finalizando o documento com as principais conclusões obtidas através de análise técnico-económica.
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Papageorgiou, Vasileios. "Techno-economic analysis of Open Optical LineSystems." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-237414.

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Technology innovations and capacity upgrades in optical networks have influenced the optical transmission. As a result, network operators are considering separating hardware and software components in order to achieve efficiency and promising savings during network operation and network lifecycle. This leads to resolving the vendor lock-in and opening up the optical networks architectures such that different kinds of disaggregation models can be supported in the DWDM transport layer.In this master thesis, a techno-economic analysis which compares the economical differences between an integrated and disaggregated optical network has been conducted. For the analysis, an actual test case scenario of a European interregional network has been utilized. The line system and transponders components, price lists and features are based on actual vendor components in today’s optical transport networks.According to the results, it has been concluded that all total cost investments required for an integrated or disaggregated approach of DWDM system are traffic dependent. Moreover, capital expenses of open architecture are influenced by business model policy in price reduction due to multiple vendors’ competition on transponders. Calculations demonstrated that a disaggregated approach can introduce considerable total cost savings about 21% less total investments that include 25% less costs for capital expenses and 3% higher cost for operational expenses on an average traffic volume of European network. Finally, by increasing 5-10 times the traffic volume of European network it has been noticed that disaggregated system reduced total cost by 39% and 43% respectively.
Tekniska innovationer och trafiktillväxt påverkar utvecklingen av optisk transmission. En konsekvens av detta är att nätoperatörer undersöker möjligheten att separera hårdvara och mjukvarukomponenter för öka effektiviteten och sänka kostnader för drift. Detta minskar inlåsning till enskilda leverantörer och öppnar upp dom optiska näten för att byggas med olika typer av disaggregering i DWDM transporten.I den här masteruppsatsen har en tekno-ekonomisk analys utförts avseende den ekonomiska skillnaden mellan integrerade och disaggregerade optiska nät. Ett verkligt nät scenario användes för analysen. Komponenter och kostnader för linjesystem och transpondrar är baserade på existerande system och prislistor i dagens nät. Enligt det erhållna resultatet har slutsatsen dragits att totala kostnaden för integrerade och öppna system är trafikberoende. Vidare så är investeringen för öppna system påverkad av pris reduktionen pga. konkurrens på transpondrar.Beräkningarna visar att disaggregerade system kan sänka kostnaderna med 21%, i dessa siffror ingår 25% lägre kostnad för investeringar och 3% högre driftkostnader.Slutligen, genom att öka trafikvolymen med 5 respektive 10 ggr från den ursprungliga trafik matrisen så kan de totala kostnaderna sänkas med 39% och 43%.
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Books on the topic "Open optical network"

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Two neural network algorithms for designing optimal terminal controllers with open final-time. [Moffett Field, Calif.]: NASA Ames Research Center, 1992.

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National Aeronautics and Space Administration (NASA) Staff. Two Neural Network Algorithms for Designing Optimal Terminal Controllers with Open Final Time. Independently Published, 2018.

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Book chapters on the topic "Open optical network"

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Ageev, Alexander A., Aleksei V. Fishkin, Alexander V. Kononov, and Sergey V. Sevastianov. "Open Block Scheduling in Optical Communication Networks." In Approximation and Online Algorithms, 13–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24592-6_2.

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Avram, Florin, Dimitris Bertsimas, and Michael Ricard. "Fluid Models of Sequencing Problems in Open Queueing Networks; an Optimal Control Approach." In Stochastic Networks, 199–234. New York, NY: Springer New York, 1995. http://dx.doi.org/10.1007/978-1-4757-2418-9_11.

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Wellen, Jeroen. "High-Speed FTTH Technologies in an Open Access Platform - the European MUSE Project." In Broadband Optical Access Networks and Fiber-to-the-Home, 139–66. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/047009480x.ch6.

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Fishburn, Jeff. "Broadband Fiber-to-the-Home Technologies, Strategies, and Deployment Plan in Open Service Provider Networks: Project UTOPIA." In Broadband Optical Access Networks and Fiber-to-the-Home, 107–37. Chichester, UK: John Wiley & Sons, Ltd, 2006. http://dx.doi.org/10.1002/047009480x.ch5.

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Li, Mingchang, Guangyu Zhang, Bin Zhou, Shuxiu Liang, and Zhaochen Sun. "Optimal Inversion of Open Boundary Conditions Using BPNN Data-Driven Model Combined with Tidal Model." In Advances in Neural Networks – ISNN 2009, 1–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01507-6_1.

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Tsiropoulou, Eirini Eleni, Georgios K. Katsinis, Alexandros Filios, and Symeon Papavassiliou. "On the Problem of Optimal Cell Selection and Uplink Power Control in Open Access Multi-service Two-Tier Femtocell Networks." In Ad-hoc, Mobile, and Wireless Networks, 114–27. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07425-2_9.

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Diaaeldin, Ibrahim Mohamed, Shady H. E. Abdel Aleem, Ahmed El-Rafei, Almoataz Y. Abdelaziz, and Ahmed F. Zobaa. "Hosting Capacity Maximization Based on Optimal Reconfiguration of Distribution Networks with Optimized Soft Open Point Operation." In Hosting Capacity for Smart Power Grids, 179–93. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40029-3_8.

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Molenda, Michael H. "History and Development of Instructional Design and Technology." In Handbook of Open, Distance and Digital Education, 1–18. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-0351-9_4-1.

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AbstractThe origins and evolution of instructional technology and instructional design are treated in this chapter as separate concepts, although having intertwined histories. As with other technologies, their origins can be traced to the scientific discoveries on which they are based. Early in the twentieth century, new discoveries in optics and electricity stimulated educators to the adoption of technological innovations such as projected still pictures, motion pictures, and audio recording. Individuals and, later, groups of affiliated professionals promoted enriching learning by adding visual and, later, audiovisual resources where verbal presentations previously dominated. As radio broadcasting grew in the 1930s and then television in the 1950s, these mass media were perceived as ways to reach audiences, in and out of school, with educative audiovisual programs. In the 1960s, the wave of interest in teaching machines incorporating behaviorist psychological technology engendered a shift in identity from audiovisual technologies to all technologies, including psychological ones. As computers became ubiquitous in the 1990s, they became the dominant delivery system, due to their interactive capabilities. With the global spread of the World Wide Web after 1995, networked computers took on communication functions as well as storage and processing functions, giving new momentum to distance education. Meanwhile, research during and after World War II prompted a technology of planning – systems analysis. In the 1960s, educators adapted the systems approach to instructional planning, starting the development of instructional systems design (ISD). Since the 1980s, ISD has been the reigning paradigm for instructional design, while instructional design has become the central activity of instructional technology professionals.
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Molenda, Michael H. "History and Development of Instructional Design and Technology." In Handbook of Open, Distance and Digital Education, 57–74. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-2080-6_4.

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AbstractThe origins and evolution of instructional technology and instructional design are treated in this chapter as separate concepts, although having intertwined histories. As with other technologies, their origins can be traced to the scientific discoveries on which they are based. Early in the twentieth century, new discoveries in optics and electricity stimulated educators to the adoption of technological innovations such as projected still pictures, motion pictures, and audio recording. Individuals and, later, groups of affiliated professionals promoted enriching learning by adding visual and, later, audiovisual resources where verbal presentations previously dominated. As radio broadcasting grew in the 1930s and then television in the 1950s, these mass media were perceived as ways to reach audiences, in and out of school, with educative audiovisual programs. In the 1960s, the wave of interest in teaching machines incorporating behaviorist psychological technology engendered a shift in identity from audiovisual technologies to all technologies, including psychological ones. As computers became ubiquitous in the 1990s, they became the dominant delivery system, due to their interactive capabilities. With the global spread of the World Wide Web after 1995, networked computers took on communication functions as well as storage and processing functions, giving new momentum to distance education. Meanwhile, research during and after World War II prompted a technology of planning – systems analysis. In the 1960s, educators adapted the systems approach to instructional planning, starting the development of instructional systems design (ISD). Since the 1980s, ISD has been the reigning paradigm for instructional design, while instructional design has become the central activity of instructional technology professionals.
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Papathomas, Evangelos, Themistoklis Diamantopoulos, and Andreas Symeonidis. "Semantic Code Search in Software Repositories using Neural Machine Translation." In Fundamental Approaches to Software Engineering, 225–44. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99429-7_13.

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AbstractNowadays, software development is accelerated through the reuse of code snippets found online in question-answering platforms and software repositories. In order to be efficient, this process requires forming an appropriate query and identifying the most suitable code snippet, which can sometimes be challenging and particularly time-consuming. Over the last years, several code recommendation systems have been developed to offer a solution to this problem. Nevertheless, most of them recommend API calls or sequences instead of reusable code snippets. Furthermore, they do not employ architectures advanced enough to exploit the semantics of natural language and code in order to form the optimal query from the question posed. To overcome these issues, we propose CodeTransformer, a code recommendation system that provides useful, reusable code snippets extracted from open-source GitHub repositories. By employing a neural network architecture that comprises advanced attention mechanisms, our system effectively understands and models natural language queries and code snippets in a joint vector space. Upon evaluating CodeTransformer quantitatively against a similar system and qualitatively using a dataset from Stack Overflow, we conclude that our approach can recommend useful and reusable snippets to developers.
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Conference papers on the topic "Open optical network"

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Auge, Jean-Luc, Gert Grammel, Esther le Rouzic, Vittorio Curri, Gabriele Galimberti, and James Powell. "Open optical network planning demonstration." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/ofc.2019.m3z.9.

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Campanella, A., H. Okui, A. Mayoral, D. Kashiwa, O. Gonzalez de Dios, D. Verchere, Q. Pham Van, et al. "ODTN: Open Disaggregated Transport Network. Discovery and control of a disaggregated optical network through open source software and open APIs." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2019. http://dx.doi.org/10.1364/ofc.2019.m3z.4.

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Sone, Yoshiaki, and Hideki Nishizawa. "Network Infrastructure to Last: Open Optical Transport Networks." In 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC). IEEE, 2022. http://dx.doi.org/10.23919/oecc/psc53152.2022.9850115.

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Ferrari, Alessio, Mark Filer, Esther Le Rouzic, Jan Kundrat, Bruno Correia, Karthikeyan Balasubramanian, Yawei Yin, Gert Grammel, Gabriele Galimberti, and Vittorio Curri. "GNPy: an open source planning tool for open optical networks." In 2020 International Conference on Optical Network Design and Modeling (ONDM). IEEE, 2020. http://dx.doi.org/10.23919/ondm48393.2020.9133027.

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Tse, Kathleen. "Progress toward an Open, SDN-controlled Photonic Network." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2018. http://dx.doi.org/10.1364/ofc.2018.m2e.1.

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Pavon-Marino, Pablo, and Jose-Luis Izquierdo-Zaragoza. "On the Role of Open-Source Optical Network Planning." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/ofc.2014.th1e.1.

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Zaragoza, Jose-Luis Izquierdo, and Pablo Pavon-Marino. "Assessing IP vs optical restoration using the open-source Net2Plan tool." In 2014 16th International Telecommunications Network Strategy and Planning Symposium (Networks). IEEE, 2014. http://dx.doi.org/10.1109/netwks.2014.6959255.

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Chbat, M. W. "The optical Pan-European network (ACTS project OPEN)." In Digest IEEE/Leos 1996 Summer Topical Meeting. Advanced Applications of Lasers in Materials and Processing. IEEE, 1996. http://dx.doi.org/10.1109/leosst.1996.540713.

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De Leenheer, Marc, Yuta Higuchi, and Guru Parulkar. "An open controller for the disaggregated optical network." In 2018 International Conference on Optical Network Design and Modeling (ONDM). IEEE, 2018. http://dx.doi.org/10.23919/ondm.2018.8396136.

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Barguil, Samier, Victor Lopez, and Juan Pedro Fernandez-Palacios Gimenez. "Towards an Open Networking Architecture." In 2020 International Conference on Optical Network Design and Modeling (ONDM). IEEE, 2020. http://dx.doi.org/10.23919/ondm48393.2020.9133038.

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Reports on the topic "Open optical network"

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Iyer, Ananth V., Samuel Labi, Steven R. Dunlop, Dutt J. Thakkar, Sayak Mishra, Lavanya Krishna Kumar, Runjia Du, Miheeth Gala, Apoorva Banerjee, and Gokul Siddharthan. Heavy Fleet and Facilities Optimization. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317365.

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The Indiana Department of Transportation (INDOT) is responsible for timely clearance of snow on state-maintained highways in Indiana as part of its wintertime operations. For this and other maintenance purposes, the state’s subdistricts maintain 101 administrative units spread throughout the state. These units are staffed by personnel, including snow truck drivers and house snow removal trucks and other equipment. INDOT indicated a need to carry out value engineering analysis of the replacement timing of the truck fleet. To address these questions, this study carried out analysis to ascertain the appropriate truck replacement age, that is different across each of the state's three weather-based regions to minimize the truck life cycle cost. INDOT also indicated a need for research guidance in possible revisions to the administrative unit locations and optimal routes to be taken by trucks in each unit in order to reduce deadhead miles. For purposes of optimizing the truck snow routes, the study developed two alternative algorithmic approaches. The first uses mathematical programming to select work packets for trucks while ensuring that snow is cleared at all snow routes and allowing the users to identify optimal route and unit location. The second approach uses network routing concepts, such as the rural postman problem, and allows the user to change the analysis inputs, such as the number of available drivers and so on. The first approach developed using opensolver (an open source tool with excel) and the second approach coded as an electronic tool, are submitted as part of this report. Both approaches can be used by INDOT’s administrative unit managers for decision support regarding the deployment of resources for snow clearing operations and to minimize the associated costs.
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Goncharenko, Tatiana, Nataliia Yermakova-Cherchenko, and Yelyzaveta Anedchenko. Experience in the Use of Mobile Technologies as a Physics Learning Method. [б. в.], November 2020. http://dx.doi.org/10.31812/123456789/4468.

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Swift changes in society, related to sciences technicians’ development, technologies, by the increase of general volume of information, pull out new requirements for maintenance, structure, and quality of education. It requires teachers to diversify a tool in the direction of the increase in possibilities of the use of mobile technologies and computer systems. Lately in the world, more attention spared to the use of mobile learning, which in obedience to «Recommendations of UNESCO on the questions of a policy in the area of mobile learning» foresees the use of mobile technology, both separate and together with other by informational computer technologies. [1]. Mobile learning allows using the open informational systems, global educational networks, unique digital resources which belong to different educational establishments and co-operate with each other. The use of existent educational resources and creation of own, based on the academic resources from informative space, allows to promote the interest of students to the study of physics, to take into account the individual features, and also features of region and framework of society of the country. During the last years in Ukraine competency-based approach to the organization of studies certainly one of basic. The new Education Act addresses the key competencies that every modern person needs for a successful life, including mathematical competence; competence in natural sciences, engineering, and technology; innovation; information and communication competence [2]. This further emphasizes the importance of providing students with quality physical education and the problems associated with it. Using mobile technology in professional teaching work, the teacher has the opportunity to implement the basic principles of the competence approach in teaching physics. An analysis of the data provided in the official reports of the Ukrainian Center for Educational Quality Assessment showed that the number of students making an external independent assessment in physics and choosing a future profession related to physics has decreased significantly. This is due to the loss of students' interest in physics and the complexity of the content of the subject, as well as the increase in the amount of information that students need to absorb. In this article, we explore the possibilities of mobile technology as a means of teaching physics students and give our own experience of using mobile technology in the process of teaching physics (for example, the optics section in primary school).
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