Search results for " Network"
showing 10 items of 6428 documents
Trusted educational networks for the internationalization of open educational resources
2013
Global educational programs have become increasingly important in Higher Education and the training sector. One promising means of global collaboration is the use of Open Educational Resources (OERs). However, this opportunity has been slow to catch on, even though millions of learning objects are freely available around the world. This paper discusses key barriers to the use of OERs, and gives recommendations for better use of materials in international collaborations. A special focus is on the development of Trusted Educational Networks, and their use within recommendation mechanisms to enhance sharing in communities of trusted colleagues. peerReviewed
Community-based method for extracting backbones
2022
Networks are an adequate representation for modeling and analyzing a great variety of complex systems. However, understanding networks with millions of nodes and billions of connections can be pretty challenging due to memory and time constraints. Therefore, selecting the relevant nodes and edges of these large-scale networks while preserving their core information is a major issue. In most cases, the so-called backbone extraction methods are based either on coarse-graining or filtering approaches. Coarse-graining techniques reduce the network size by gathering similar nodes into super-nodes, while filter-based methods eliminate nodes or edges according to a statistical property. In this wo…
Dynamic MAC Parameters Configuration for Performance Optimization in 802.11e Networks
2006
Quality of service support in wireless LAN is a theme of current interest. Several solutions have been proposed in literature in order to protect time-sensitive traffic from best-effort traffic. According to the EDCA proposal, which is a completely distributed solution, the service differentiation is provided by giving probabilistically higher number of channel accesses to stations involved in real-time applications. To this purpose, the MAC parameter settings of each contending stations can be tuned dynamically. In this paper, we face the problem of tuning the EDCA MAC parameters in common scenarios in which a given number of low-rate delay-sensitive traffic flows share the channel with so…
Remarks on IEEE 802.11 DCF Performance Evaluation, IEEE Communication Letters, Vol. 9, Issue 8, Aug 2005 pp:765 - 767
2005
This letter presents a new approach to evaluate the throughput/delay performance of the 802.11 Distributed Coordination Function (DCF). Our approach relies on elementary conditional probability arguments rather than bidimensional Markov chains (as proposed in previous models), and can be easily extended to account for backoff operation more general than DCF's one
On the accuracy of some common modeling assumptions for EDCA analysis
2005
Several models have been discussed in literature in order to evaluate the performance of the EDCA differentiation mechanisms. Despite of the exponential back off rules, usually the EDCA protocol has been modeled as a persistent slotted access protocol, and summarized into a set of access probabilities. These models often show a very different complexity and accuracy, according to the basis assumptions. In this paper, we propose a new modeling approach for EDCA, in which the medium access is described in terms of backoff counter comparisons, contention by contention, and no restrictive hypothesis is considered. Through our model, we verify the applicability of the most common protocol simpli…
Kapitał społeczny w zrównoważonym rozwoju regionu opolskiego na przykładzie badań w towarowych gospodarstwach rolnych / Social capital in balanced de…
2016
Kolejna transformacja kapitalizmu, wspierana narzędziami społeczeństwa informacyjnego, zakłada wiele endogenicznych zmian technologicznych wprowadzanych z uwzględnieniem środowiska instytucjonalnego służącego rozwojowi zrównoważonemu. Taka forma globalizacji potrzebuje lokalności, także tej kryjącej się w rolnictwie i na obszarach wiejskich, i stanowi szanse ich rozwoju. W artykule uzasadniana jest teza, że sieci społeczne rolników i ich powiązania międzyorganizacyjne stanowią warunek takiej zmiany, o ile służą zapewnieniu trwałości kapitału naturalnego, finansowego i ludzkiego. W pracy analizowane są wyniki badań kwestionariuszowych dotyczących zrównoważonego rozwoju towarowych gospodarstw…
Quality, Reliability, Security and Robustness in Heterogeneous Systems
2020
This book constitutes the refereed post-conference proceedings of the 15th EAI International Conference on Quality, Reliability, Security and Robustness in Heterogeneous Networks, QShine 2019, held in Shenzhen, China, in November 2019. The 16 revised full papers were carefully reviewed and selected from 55 submissions. The papers are organized thematically in tracks, starting with mobile systems, cloud resource management and scheduling, machine learning, telecommunication systems, and network management.
Students’ social networks and vaccination behaviour in Italian junior high schools: preliminary results from the "VacciniAmo le Scuole" project.
2015
Students; social networks; vaccination; behavior; high schools
Sieci społecznościowe w ukraińskiej edukacji: blaski i cienie
2018
W artykule przedstawiono koncepcyjne podstawy bezpieczeństwa w zakresie korzystania z sieci społecznościowych w edukacji na Ukrainie. Potwierdzono stanowisko, że tylko z wystarczającym stopniem kształcenia w tym wymiarze, edukacja nabywa nieprzerwanej formy i może skutecznie pełnić funkcję rozwoju aktualnych wartości dla narodu ukraińskiego i innych nacji. Podkreślono ideę potencjalnego wpływu sieci społecznych jako innowacyjnego narzędzia edukacyjnego wpływającego bezpośrednio lub pośrednio na bezpieczeństwo humanitarne państwa ukraińskiego. Wykazano, że wpływ ten jest spowodowany szybkim i dyskretnym rozpowszechnianiem informacji za pośrednictwem sieci społecznościowych, realizowanym zaró…
Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network
2019
Gravitational wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar mass binary black holes and a neutron star binary. This paper reports on the all-sky search for gravitational waves from intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network. The search uses three independent algorithms: two based on matched filtering of the data with waveform templates of gravitational wave signals from compact binaries, and a third, model-independent algorithm that employs no signal model for the incoming signal. No intermediate mass black hole binary event was detected in this sear…