How can users' interests be considered to improve content dissemination/retrieval?
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Content will have an important role in what concerns information dissemination and retrieval in Future Internet Architecture (FIA). This surely results in a new way of how communication takes place. Since content is correlated to interest of whomever produces and/or consumes it, considering the users’ interests to aid information exchange seem to be an interesting approach. Additionally, Delay-Tolerant Networks (DTNs) are expected to be part of these future architectures comprised by worldwide network. Thus, this presentation is on how users’ interest and DTNs can be part of the near future Internet. This presentation was given as a teaser topic in the 2nd Approaches to Paradigms of a Future Internet (API): The Role of the Information-centric Networking Paradigm on Future Internet Architectures, on Jul 9th, 2010, at Portugal Telecom Inovação, Aveiro, Portugal. http://siti.ulusofona.pt/~api/
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Public safety plays an important role in what concerns the social welfare of citizens, thus impacting their quality of life. There are different mechanisms (e.g., police, firefighters) in place to help citizens feel safe, and the citizens themselves may have a more proactive posture (e.g., neighborhood watch). The proposed Android application, called CIMPL, targets the willingness of these model citizens in engaging in public safety efforts and the capabilities of their mobile personal devices to improve social welfare. CIMPL allows users to opportunistically exchange public safety content among their devices. This content, produced by users, identifies potential hazard situations, and is used to duly notify the authorities involved in the maintenance of public safety.
This presentation was given in the 15th International Conference on Ad Hoc Networks and Wireless (AdHoc-Now 2016), on July 4th, 2016 in Lille, France.
Social-aware Opportunistic Routing Protocol based on User's Interactions and ...
Nowadays, routing proposals must deal with a panoply of heterogeneous devices, intermittent connectivity, and the users' constant need for communication, even in rather challenging networking scenarios. Thus, we propose a Social-aware Content-based Opportunistic Routing Protocol, SCORP, that considers the users' social interaction and their interests to improve data delivery in urban, dense scenarios. Through simulations, using synthetic mobility and human traces scenarios, we compare the performance of our solution against other two social-aware solutions, dLife and Bubble Rap, and the social-oblivious Spray and Wait, in order to show that the combination of social awareness and content knowledge can be bene cial when disseminating data in challenging networks
This presentation was given on my behalf by Dr. Mendes in the 5th International Conference on Ad Hoc Networks (ADHOCNETS 2013), on October 16th, 2013 in Barcelona, Spain.
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Social-aware pervasive networks consider the users' social behavior to overcome intermittent end-to-end connectivity, inherent to this type of networking: forwarding decisions consider local knowledge about the behavior of nodes to predict future encounters. Complex Network Analysis (CNA) has been used to support contact prediction, by aggregating connectivity graphs into less volatile social graphs. Nevertheless, the structure of such graphs is rather dynamic, since users' social behavior and interactions vary throughout their daily routines and according to their mobility. Consequently, aggregation algorithms should be able to create social graphs that reflect the resulting dynamic behavior of people. This paper discusses on human behavior-aware aggregation to allow the creation of graphs based on social variations observed in people's daily routines. By focusing on the dynamics of the network, we show that social graphs, reflecting different stages of human social behavior and mobility, are able to take advantage of the potential small-world properties of networks in different time frames, improving the performance of social-aware opportunistic forwarding.
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A closer look at Online Social Networks (OSNs)
Presents the work of Mislove et al. (2009) on the
characteristics of Online Social Networks.
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Opportunistic Routing Based on Daily Routines
Opportunistic routing is being investigated to enable
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The authors propose a taxonomy and universal evaluation framework to assess opportunistic routing algorithms. They classify existing routing solutions and identify common performance metrics like delivery probability, cost, and delay. An evaluation of Epidemic, PROPHET, and BubbleRap routing under different mobility models shows that Epidemic and PROPHET have higher delivery rates but also greater costs and delays than BubbleRap. The proposed taxonomy and evaluation framework aim to provide a fair and standardized way to compare opportunistic routing algorithms.
dLife: Opportunistic Routing based on Users Daily Life Routine
The social-aware opportunistic routing protocol dLife is also part of the DTN-Amazon project fruit of a partnership between SITILabs and GERCOM/UFPA. This presentation introduces dLife and its functioning, and shows how it fits in the context of this project.
This presentation was given in the 7th WiNeMo meeting on May 14th, 2013 at University of Coimbra in Coimbra, Portugal.
Social-aware Forwarding in Opportunistic Wireless Networks: Content Awareness...
Information-Centric Networking (ICN) has gained increasing attention from the research community as it is able to improve content dissemination by releasing the dependency on content location. With the current host-based Internet architecture, networking faces limitations in dynamic scenarios, due mostly to host mobility. The ICN paradigm mitigates such problems by releasing the need to have an end-to-end transport session established during the life time of the data transfer. Moreover, the ICN concept solves the mismatch between the Internet architecture and the way users would like to use it: currently a user needs to know the topological location of the hosts involved in the communication when he/she just wants to get the data, independently of its location. Most of the research efforts aim to come up with a stable ICN architecture in fixed networks, with few examples in ad-hoc and vehicular networks. However, the Internet is becoming more pervasive with powerful personal mobile devices that allow users to form dynamic networks in which content may be exchanged at all times and with low cost. Such pervasive wireless networks suffer with different levels of disruption given user mobility, physical obstacles, lack of cooperation, intermittent connectivity, among others. This paper discusses the combination of content knowledge (e.g., type and interested parties) and social awareness within opportunistic networking as to drive the deployment of ICN solutions in disruptive networking scenarios. With this goal in mind, we go over few examples of social-aware content-based opportunistic networking proposals that consider social awareness to allow content dissemination independently of the level of network disruption. To show how much content knowledge can improve social-based solutions, we illustrate by means of simulation some content-oblivious/oriented proposals in scenarios based on synthetic mobility patterns and real human traces.
This presentation was given in the 8th IEEE WoWMoM Workshop on Autonomic and Opportunistic Communications (AOC 2014), on June 16th, 2014 in Sydney, Australia.
Mobile Communication
The document discusses wireless networks and IEEE 802.11 standards. It describes the components of wired LANs like repeaters, hubs, bridges, and switches. It then covers wireless networks including wireless LAN standards like 802.11b, 802.11a, and 802.11g. It also discusses wireless network topologies, services, and the medium access control of 802.11 which uses CSMA/CA for distributed coordination function and an alternative point coordination function for centralized access control.
Opportunistic Networking
Opportunistic networks (OppNets) allow communication between nodes that are mobile or fixed even when there is no predetermined path connecting them. Nodes in an OppNet opportunistically choose the next hop to bring a message closer to its destination based on local knowledge of current neighbors. Messages are stored and forwarded whenever contact opportunities arise between devices in a delay-tolerant manner. Epidemic routing resembles the spread of disease as messages diffuse through the network by infecting nodes that receive them.
Two examples of OppNet projects are ZebraNet, which tracks wildlife in Kenya using cost-effective non-intrusive monitoring, and DakNet, providing internet access to rural villages in India using kiosks
Performance Evaluation of Opportunistic Routing Protocols: A Framework-based ...
Performance Evaluation of Opportunistic Routing Protocols: A Framework-based ...Torsten Braun, Universität Bern
The document summarizes a framework for evaluating opportunistic routing protocols using the OMNeT++ simulator. It describes opportunistic routing protocols like ExOR and MORE, and the standard OLSR protocol. It outlines the common functionalities of the simulation framework, including neighbor discovery, packet buffering, and transmission reliability control. Simulation results show that opportunistic routing achieves higher throughput than OLSR, especially in lossy channels, and its performance improves with higher node density and channel rates but degrades with too many potential forwarders due to increased collisions.Viewers also liked (20)
Study on the Effect of Network Dynamics on Opportunistic Routing
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SocialDTN: a DTN Implementation for Digital and Social Inclusion
SocialDTN: a DTN Implementation for Digital and Social Inclusion
CIMPL: A Public Safety Tool based on Opportunistic Communication
CIMPL: A Public Safety Tool based on Opportunistic Communication
Social-aware Opportunistic Routing Protocol based on User's Interactions and ...
Social-aware Opportunistic Routing Protocol based on User's Interactions and ...
dLife: Opportunistic Routing based on Users Daily Life Routine
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Social-aware Forwarding in Opportunistic Wireless Networks: Content Awareness...
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Main news related to the CCS TSI 2023 (2023/1695)
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Astute Business Solutions | Oracle Cloud Partner |
Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
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5th LF Energy Power Grid Model Meet-up Slides
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
Digital Banking in the Cloud: How Citizens Bank Unlocked Their Mainframe
Inconsistent user experience and siloed data, high costs, and changing customer expectations – Citizens Bank was experiencing these challenges while it was attempting to deliver a superior digital banking experience for its clients. Its core banking applications run on the mainframe and Citizens was using legacy utilities to get the critical mainframe data to feed customer-facing channels, like call centers, web, and mobile. Ultimately, this led to higher operating costs (MIPS), delayed response times, and longer time to market.
Ever-changing customer expectations demand more modern digital experiences, and the bank needed to find a solution that could provide real-time data to its customer channels with low latency and operating costs. Join this session to learn how Citizens is leveraging Precisely to replicate mainframe data to its customer channels and deliver on their “modern digital bank” experiences.
Choosing The Best AWS Service For Your Website + API.pptx
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
Introduction of Cybersecurity with OSS at Code Europe 2024
I develop the Ruby programming language, RubyGems, and Bundler, which are package managers for Ruby. Today, I will introduce how to enhance the security of your application using open-source software (OSS) examples from Ruby and RubyGems.
The first topic is CVE (Common Vulnerabilities and Exposures). I have published CVEs many times. But what exactly is a CVE? I'll provide a basic understanding of CVEs and explain how to detect and handle vulnerabilities in OSS.
Next, let's discuss package managers. Package managers play a critical role in the OSS ecosystem. I'll explain how to manage library dependencies in your application.
I'll share insights into how the Ruby and RubyGems core team works to keep our ecosystem safe. By the end of this talk, you'll have a better understanding of how to safeguard your code.
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How can users' interests be considered to improve content dissemination/retrieval?
- 1. 2010-07-09 How can users' interests be considered to improve content dissemination/retrieval? Campus da FEUP Teaser Topic Rua Dr. Roberto Frias, 378 4200 - 465 Porto Portugal T +351 222 094 000 F +351 222 094 050 Waldir Aranha Moreira Junior www@inescporto.pt www.inescporto.pt © 2010 API 2nd Think-Tank Meeting, PT Inovação, Aveiro
- 2. Agenda • What should the Future Internet Architecture be based upon ? • Are Delay-Tolerant Networks good for information dissemination/retrieval? • How to improve content dissemination in DTNs? • The role of social interests to improve content dissemination/retrieval © 2010 2
- 3. What should the Future Internet Architecture be based upon? What should a future internet architecture support? • Intermittent connectivity, since it is common to find: – Long propagation and delay times: e.g., very long distances – Disperse nodes: signal attenuation as the square of distance – Power-limited mobile devices and interference zones: high packet loss • Global communication: – Each network should be adapted to a particular communication region – Spanning more than one region requires specialized translation and buffering agents The concept of Delay-Tolerant Networks • No assumption of existing e2e path • Cope with different networking regions • Exploit user mobility • Applicable in sparse and dense scenarios • Deal with multiple time-varying links with frequent partition and high delay © 2010 3
- 4. Are DTNs good for information dissemination/retrieval ? It has great potential in any type of network density • Sparse Networks (e.g., rural areas, space networks) • Dense (e.g., urban areas) Supports Publish/Subscriber Paradigm • Prosumers: content provision/retrieval • Separation of content creation and consumption Supports Store-Carry-Forward Paradigm • Opportunistic routing in challenge environments • Massive infrastructure deployment based on personal devices Real-time ? • Depends on the tolerance level • Some communication is better than no communication at all © 2010 4
- 5. How to improve content dissemination in DTNs? Focus on multi-point communication algorithms • Current work focus on point-to-point communications Make intelligent usage of contact opportunities • Increase data delivery probability • Reduce communication delay and cost (e.g., information duplication) • Some metrics: mobility based, social based Make good usage of available cooperation levels • Between users • Willingness to share resources (Store-Carry-Forwarding) • Incentives: so-wanted anytime/anywhere connectivity • Regarding infrastructure • Legacy and DTN nodes • Work together to increase their coverage © 2010 5
- 6. The role of social interests to improve content dissemination/retrieval Data dissemination depends on: • Intelligent replication of information • Timely delivery of information to interested people Timely delivery of information: social entanglement • Forwarding to nodes with high probability to meet the destination • Formation of communities (number of contacts and contact time) • Statically defined and based on very subjective metrics (Interests) • Difficult to translate real social information (Interests) into the communication world Intelligent replication: targeting interested users only • Publish/subscriber paradigm • Users sharing interests spend more time collocated Important questions • How can interests be mapped into metrics to aid dissemination ? • How detailed interests should be ? • Do we run the risk of “spamming” users with unwanted content ? © 2010 6
- 7. 2010-07-09 How can users' interests be considered to improve content dissemination/retrieval? Campus da FEUP Teaser Topic Rua Dr. Roberto Frias, 378 4200 - 465 Porto Portugal T +351 222 094 000 F +351 222 094 050 Waldir Aranha Moreira Junior www@inescporto.pt www.inescporto.pt © 2010 API 2nd Think-Tank Meeting, PT Inovação, Aveiro