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Technologies, Volume 7, Issue 2

2019 June - 17 articles

Cover Story: Conformable sensors enable the fabrication of flexible systems and their seamless integration onto irregular-shaped soft surfaces. By mimicking the flexible nature of sensory receptors in living organisms, these devices aim to open the path towards truly imperceptible systems, such as smart textiles and artificial skins, for the development of context-aware systems. To achieve this, materials and structures for innovative flexible sensors, as well as their integration into complex systems, continue to be in the research spotlight. Here, the current state of flexible sensor technologies is outlined. Special emphasis is given to the materials and structures used to realize strain, temperature, chemical, light, and electropotential sensors. Furthermore, the simulation, conditioning, and application of these sensors is discussed. View this paper
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Articles (17)

  • Article
  • Open Access
21 Citations
10,664 Views
19 Pages

CogBeacon: A Multi-Modal Dataset and Data-Collection Platform for Modeling Cognitive Fatigue

  • Michalis Papakostas,
  • Akilesh Rajavenkatanarayanan and
  • Fillia Makedon

In this work, we present CogBeacon, a multi-modal dataset designed to target the effects of cognitive fatigue in human performance. The dataset consists of 76 sessions collected from 19 male and female users performing different versions of a cogniti...

  • Review
  • Open Access
125 Citations
17,792 Views
18 Pages

A Perspective on Terahertz Next-Generation Wireless Communications

  • John F. O’Hara,
  • Sabit Ekin,
  • Wooyeol Choi and
  • Ickhyun Song

In the past year, fifth-generation (5G) wireless technology has seen dramatic growth, spurred on by the continuing demand for faster data communications with lower latency. At the same time, many researchers argue that 5G will be inadequate in a shor...

  • Article
  • Open Access
35 Citations
11,635 Views
12 Pages

Micro-CT Evaluation of Defects in Ti-6Al-4V Parts Fabricated by Metal Additive Manufacturing

  • Haijun Gong,
  • Venkata Karthik Nadimpalli,
  • Khalid Rafi,
  • Thomas Starr and
  • Brent Stucker

In this study, micro-computed tomography (CT) is utilized to detect defects of Ti-6Al-4V specimens fabricated by selective laser melting (SLM) and electron beam melting (EBM), which are two popular metal additive manufacturing methods. SLM and EBM sp...

  • Article
  • Open Access
24 Citations
7,303 Views
16 Pages

An Intelligent Model for the Prediction of Bond Strength of FRP Bars in Concrete: A Soft Computing Approach

  • Hamed Bolandi,
  • Wolfgang Banzhaf,
  • Nizar Lajnef,
  • Kaveh Barri and
  • Amir H. Alavi

Accurate prediction of bond behavior of fiber reinforcement polymer (FRP) concrete has a pivotal role in the construction industry. This paper presents a soft computing method called multi-gene genetic programming (MGGP) to develop an intelligent pre...

  • Article
  • Open Access
20 Citations
8,878 Views
19 Pages

The recommender systems are deployed on the Web for reducing cognitive overload. It uses different parameters, such as profile information, feedbacks, history, etc., as input and recommends items to a user or group of users. Such parameters are easy...

  • Article
  • Open Access
5 Citations
5,977 Views
9 Pages

Fast and Efficient Sensitivity Aware Multi-Objective Optimization of Analog Circuits

  • Amel Garbaya,
  • Mouna Kotti,
  • Omaya Bellaaj Kchaou,
  • Mourad Fakhfakh,
  • Omar Guillen-Fernandez and
  • Esteban Tlelo-Cuautle

This article introduces a novel approach for generating low-sensitive Pareto fronts of analog circuit performances. The main idea consists of taking advantage from the social interaction between particles within a multi-objective particle swarm optim...

  • Article
  • Open Access
7 Citations
6,406 Views
10 Pages

The CO2-assisted polymer compression method is used herein to prepare porous polymer materials by bonding laminated polymer fiber sheets using a piston in the presence of CO2. In this work, the CO2 flow line connections were moved from the pressure v...

  • Article
  • Open Access
16 Citations
6,863 Views
10 Pages

Optimizing the Kaplan–Yorke Dimension of Chaotic Oscillators Applying DE and PSO

  • Alejandro Silva-Juarez,
  • Gustavo Rodriguez-Gomez,
  • Luis Gerardo de la Fraga,
  • Omar Guillen-Fernandez and
  • Esteban Tlelo-Cuautle

When a new chaotic oscillator is introduced, it must accomplish characteristics like guaranteeing the existence of a positive Lyapunov exponent and a high Kaplan–Yorke dimension. In some cases, the coefficients of a mathematical model can be va...

  • Article
  • Open Access
2 Citations
6,014 Views
13 Pages

The uncertainties in various Electromagnetic (EM) problems may present a significant effect on the properties of the involved field components, and thus, they must be taken into consideration. However, there are cases when a number of stochastic inpu...

  • Article
  • Open Access
4 Citations
7,563 Views
15 Pages

User Similarity Determination in Social Networks

  • Sadia Tariq,
  • Muhammad Saleem and
  • Muhammad Shahbaz

Online social networks have provided a promising communication platform for an activity inherently dear to the human heart, to find friends. People are recommended to each other as potential future friends by comparing their profiles which require nu...

  • Review
  • Open Access
194 Citations
44,120 Views
81 Pages

Flexible Sensors—From Materials to Applications

  • Júlio C. Costa,
  • Filippo Spina,
  • Pasindu Lugoda,
  • Leonardo Garcia-Garcia,
  • Daniel Roggen and
  • Niko Münzenrieder

Flexible sensors have the potential to be seamlessly applied to soft and irregularly shaped surfaces such as the human skin or textile fabrics. This benefits conformability dependant applications including smart tattoos, artificial skins and soft rob...

  • Review
  • Open Access
26 Citations
12,185 Views
22 Pages

Integration of Biometrics and Steganography: A Comprehensive Review

  • Ian McAteer,
  • Ahmed Ibrahim,
  • Guanglou Zheng,
  • Wencheng Yang and
  • Craig Valli

The use of an individual’s biometric characteristics to advance authentication and verification technology beyond the current dependence on passwords has been the subject of extensive research for some time. Since such physical characteristics cannot...

  • Communication
  • Open Access
46 Citations
13,352 Views
10 Pages

The drum-like virtual reality (VR) keyboard is a contemporary, controller-based interface for text input in VR that uses a drum set metaphor. The controllers are used as sticks which, through downward movements, “press” the keys of the vi...

  • Review
  • Open Access
19 Citations
13,777 Views
28 Pages

Nematic Liquid Crystal Composite Materials for DC and RF Switching

  • Mohiuddin Munna,
  • Farhana Anwar and
  • Ronald A. Coutu

Liquid Crystals (LCs) are widely used in display devices, electro-optic modulators, and optical switches. A field-induced electrical conductivity modulation in pure liquid crystals is very low which makes it less preferable for direct current (DC) an...

  • Communication
  • Open Access
7 Citations
7,967 Views
16 Pages

Due to instant availability of data on social media platforms like Twitter, and advances in machine learning and data management technology, real-time crisis informatics has emerged as a prolific research area in the last decade. Although several ben...

  • Article
  • Open Access
57 Citations
8,830 Views
16 Pages

A Framework for Prediction of Household Energy Consumption Using Feed Forward Back Propagation Neural Network

  • Muhammad Fayaz,
  • Habib Shah,
  • Ali Mohammad Aseere,
  • Wali Khan Mashwani and
  • Abdul Salam Shah

Energy is considered the most costly and scarce resource, and demand for it is increasing daily. Globally, a significant amount of energy is consumed in residential buildings, i.e., 30–40% of total energy consumption. An active energy predictio...

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Technologies - ISSN 2227-7080