We investigate quality of transmission (QoT) estimation in a multi-band scenario, including wideband description the frequency-dependent physical layer parameters and disaggregated QoT approach.In particular, we use experimentally-derived erbium- thulium-doped fiber amplifier operational data, simulate generation nonlinear interference (NLI) noise by comparing implementations split-step Fourier...

The rapidly growing traffic demands in fiber-optical networks require flexibility and accuracy configuring lightpaths, for which fast accurate quality of transmission (QoT) estimation is pivotal importance. This paper introduces a machine learning (ML)-based QoT approach that meets these requirements. proposed gradient-boosting ML model uses precomputed per-channel self-channel-interference val...

The performance of optical devices can degrade because aging and external causes like, for example, temperature variations. Such degradation might start with a low impact on the Quality Transmission (QoT) supported lightpaths (soft-failure). However, it degenerate into hard-failure if device itself is not repaired or replaced, an cause responsible properly addressed. In this work, we propose co...

Filterless Optical Networks (FONs) represent a novel cost-effective solution for metro optical networks, that allows to achieve equipment-cost savings by removing expensive optical-switching components from network nodes. In this study, we investigate how further reduce equipment cost in FONs minimizing amplifiers’ cost. We propose Genetic Algorithm (GA) placing boosters, inline amplifiers and ...

Prior to COVID-19, telework was a key action adopted by companies foster employee wellbeing, but the evidence of its effects equivocal. This study aims 1) develop and validate questionnaire measuring quality (QoT-q) 2) assess impact on work engagement work-family balance in case high-quality (HqT), low-quality (LqT), no (NoT). The sample consists 260 workers from three Italian organizations. Th...

In transparent optical networks, signals can propagate over long distances without electrical regeneration, causing physical layer impairments to accumulate and make lightpaths’ Quality of Transmission (QoT) become potentially unacceptable. Depending on the channel load and transmission distance some paths cannot be set up fully transparently because the transmission quality requirements (i.e. ...

It is difficult to develop and deploy Language Technology and applications for minority languages for many reasons. These include the lack of Natural Language Processing (NLP) resources for the language, a scarcity of NLP researchers who speak the language and the communication gap between teachers in the classroom and researchers working in universities and other centres of research. One appro...

Maintaining a good quality of transmission (QoT) in optical transport networks is key to maintaining the service level agreement between user and provider. QoT prediction techniques have been used assure new lightpaths as well that previously provisioned ones. Traditionally, two different approaches used: analytical methods, which take into account most physical impairments are accurate but com...

Currently many users trust binaries downloaded from repositories such as sourceforge.net. As with any system connected to the Internet, such repositories can be subject to attacks tampering with the distributed binaries (inserting viruses, changing behavior). We propose a mechanism to reduce the level of trust that users are required to have into repositories for open source software that is ma...