scholarly journals Body-Centric Terahertz Networks: Prospects and Challenges

2020 ◽  
Author(s):  
Nasir Saeed ◽  
Mohamed Habib Loukil ◽  
Hadi Sarieddeen ◽  
Tareq Y. Al-Naffouri ◽  
Mohamed-Slim Alouini
Keyword(s):  
Communication Networks ◽  
Biomedical Applications ◽  
Future Generations ◽  
Healthcare Sector ◽  
Open Research ◽  
Medium Range ◽  
Research Problems ◽  
Thz Communications ◽  
Thz Sensing ◽  
Air Interfaces

<div>Following recent advancements in Terahertz (THz)</div><div>technology, THz communications are currently being celebrated as key enablers for various applications in future generations of communication networks. While typical communication use cases are over medium-range air interfaces, the inherently small beamwidths and transceiver footprints at THz frequencies support nano-communication paradigms. In particular, the use of the THz band for in-body and on-body communications has been gaining attention recently. By exploiting the accurate THz sensing and imaging capabilities, body-centric THz biomedical applications can transcend the limitations of molecular, acoustic, and radio-frequency solutions. In this paper, we study the use of the THz band for body-centric networks, by surveying works on THz device technologies, channel and noise modeling, modulation schemes, and networking topologies. We also promote THz sensing and imaging applications in the healthcare sector, especially for detecting zootonic viruses such as Coronavirus. We</div><div>present several open research problems for body-centric THz networks.</div>

scholarly journals Body-Centric Terahertz Networks: Prospects and Challenges

2020 ◽  
Author(s):  
Nasir Saeed ◽  
Mohamed Habib Loukil ◽  
Hadi Sarieddeen ◽  
Tareq Y. Al-Naffouri ◽  
Mohamed-Slim Alouini
Keyword(s):  
Communication Networks ◽  
Biomedical Applications ◽  
Future Generations ◽  
Healthcare Sector ◽  
Open Research ◽  
Medium Range ◽  
Research Problems ◽  
Thz Communications ◽  
Thz Sensing ◽  
Air Interfaces

<div>Following recent advancements in Terahertz (THz)</div><div>technology, THz communications are currently being celebrated as key enablers for various applications in future generations of communication networks. While typical communication use cases are over medium-range air interfaces, the inherently small beamwidths and transceiver footprints at THz frequencies support nano-communication paradigms. In particular, the use of the THz band for in-body and on-body communications has been gaining attention recently. By exploiting the accurate THz sensing and imaging capabilities, body-centric THz biomedical applications can transcend the limitations of molecular, acoustic, and radio-frequency solutions. In this paper, we study the use of the THz band for body-centric networks, by surveying works on THz device technologies, channel and noise modeling, modulation schemes, and networking topologies. We also promote THz sensing and imaging applications in the healthcare sector, especially for detecting zootonic viruses such as Coronavirus. We</div><div>present several open research problems for body-centric THz networks.</div>

Nanonetworks in Biomedical Applications

2019 ◽  
Vol 20 (8) ◽  
pp. 800-807 ◽  
Author(s):  
Jose Luis Marzo ◽  
Josep Miquel Jornet ◽  
Massimiliano Pierobon
Keyword(s):  
Communication Networks ◽  
Information Exchange ◽  
Biomedical Applications ◽  
Chemical Compounds ◽  
The Internet ◽  
Molecular Communication ◽  
Common Goal ◽  
Communication Paradigm ◽  
Communication Needs ◽  
Electromagnetic Signals

By interconnecting nanomachines and forming nanonetworks, the capacities of single nanomachines are expected to be enhanced, as the ensuing information exchange will allow them to cooperate towards a common goal. Nowadays, systems normally use electromagnetic signals to encode, send and receive information, however, in a novel communication paradigm, molecular transceivers, channel models or protocols use molecules. This article presents the current developments in nanomachines along with their future architecture to better understand nanonetwork scenarios in biomedical applications. Furthermore, to highlight the communication needs between nanomachines, two applications for nanonetworks are also presented: i) a new networking paradigm, called the Internet of NanoThings, that allows nanoscale devices to interconnect with existing communication networks, and ii) Molecular Communication, where the propagation of chemical compounds like drug particles, carry out the information exchange.

scholarly journals Evolution of Semantic Similarity—A Survey

2021 ◽  
Vol 54 (2) ◽  
pp. 1-37
Author(s):  
Dhivya Chandrasekaran ◽  
Vijay Mago
Keyword(s):  
Natural Language ◽  
Semantic Similarity ◽  
Language Processing ◽  
Hybrid Methods ◽  
Research Work ◽  
Similarity Measures ◽  
Text Data ◽  
Knowledge Based ◽  
Open Research ◽  
Research Problems

Estimating the semantic similarity between text data is one of the challenging and open research problems in the field of Natural Language Processing (NLP). The versatility of natural language makes it difficult to define rule-based methods for determining semantic similarity measures. To address this issue, various semantic similarity methods have been proposed over the years. This survey article traces the evolution of such methods beginning from traditional NLP techniques such as kernel-based methods to the most recent research work on transformer-based models, categorizing them based on their underlying principles as knowledge-based, corpus-based, deep neural network–based methods, and hybrid methods. Discussing the strengths and weaknesses of each method, this survey provides a comprehensive view of existing systems in place for new researchers to experiment and develop innovative ideas to address the issue of semantic similarity.

scholarly journals A Vision of 6G Wireless Systems: Applications, Trends, Technologies, and Open Research Problems

IEEE Network ◽  
2020 ◽  
Vol 34 (3) ◽  
pp. 134-142 ◽  
Author(s):  
Walid Saad ◽  
Mehdi Bennis ◽  
Mingzhe Chen
Keyword(s):  
Wireless Systems ◽  
Open Research ◽  
Research Problems

scholarly journals Fast Recovery Mechanisms in the Data Plane

2020 ◽  
Author(s):  
Marco Chiesa ◽  
Andrzej Kamisiński ◽  
Jacek Rak ◽  
Gábor Rétvári ◽  
Stefan Schmid
Keyword(s):  
Communication Networks ◽  
State Of The Art ◽  
Software Defined Networks ◽  
Fast Recovery ◽  
Link Layer ◽  
Open Research ◽  
Data Plane ◽  
Recovery Mechanisms ◽  
Networking Technologies ◽  
Over Time

<div>In order to meet their stringent dependability requirements, most modern communication networks support fast-recovery mechanisms in the data plane. While reactions to failures in the data plane can be significantly faster compared to control plane mechanisms, implementing fast recovery in the data plane is challenging, and has recently received much attention in the literature. This tutorial presents a systematic overview of packet-based fast-recovery mechanisms in the data plane, focusing on concepts but structured around different networking technologies, from traditional link-layer and IP-based mechanisms, over BGP and MPLS to emerging software-defined networks and programmable dataplanes. We examine the evolution of fast-recovery standards and mechanisms over time, and identify and discuss the fundamental principles and algorithms underlying different mechanisms. We then present a taxonomy of the state-of-the-art and compile open research</div><div>questions.</div>

Mobile Ad Hoc Networks

2011 ◽  
pp. 31-47 ◽  
Author(s):  
Crescenzio Gallo ◽  
Michele Perilli ◽  
Michelangelo De Bonis
Keyword(s):  
Ad Hoc Networks ◽  
Mobile Ad Hoc Networks ◽  
Communication Networks ◽  
Ad Hoc ◽  
Point Of View ◽  
Practical Implementation ◽  
Link Stability ◽  
Research Problems ◽  
Mobile Ad Hoc ◽  
Hoc Networks

Mobile communication networks have become an integral part of our society, significantly enhancing communication capabilities. Mobile ad hoc networks (MANETs) extend this capability to any time/anywhere communication, providing connectivity without the need of an underlying infrastructure. The new coming realm of mobile ad hoc networks is first investigated, focusing on research problems related to the design and development of routing protocols, both from a formal and technical point of view. Then link stability in a high mobility environment is examined, and a route discovery mechanism is analyzed, together with a practical implementation of a routing protocol in ad hoc multi-rate environments which privileges link stability instead of traditional speed and minimum distance approaches.

A Qualitative Model for Service Oriented Computing

2007 ◽  
Vol 11 (10) ◽  
pp. 1209-1215
Author(s):  
Jian Ying Zhang ◽  
◽  
Hepu Deng ◽  
Ryszard Kowalczyk ◽  
Keyword(s):  
Decision Support ◽  
Causal Discovery ◽  
Causal Network ◽  
Qualitative Model ◽  
Service Oriented Computing ◽  
Open Research ◽  
Real World Problem ◽  
Proposed Model ◽  
Research Problems ◽  
Service Oriented

In this paper we introduce fuzzy causal network as a qualitative model for service oriented computing. Firstly, we give a brief description of fuzzy causal network. Secondly, we explain how fuzzy causal network can be used as a qualitative model for service oriented computing. Thirdly, We use fuzzy causal network to model a real world problem in the area of service oriented computing to demonstrate the correctness and effectiveness of this model. Finally, we outline some open research problems for further study. The proposed model has potential to become a good framework for causal discovery and decision support in service oriented computing, especially in the cases where intensive interaction among various services are involved.

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