Guest Editorial Special Issue on Emerging Social Internet of Things: Recent Advances and Applications

The concept of Social Internet of Things (SIoT) has emerged from the integration of social networking into the core of the Internet of Things (IoT). It envisions IoT objects and devices to have social interactions with each other autonomously, cooperate with other agents, and exchange information with human users and ...

Parametric analysis of laminar pulsating flow in a rectangular channel

Pulsating flow has potential for enhanced cooling of future electronics and photonics systems. To better understand the mechanisms underlying any heat transfer enhancement, it is necessary to decouple the mechanical and thermal problems. The current work performs a parametric analysis of the flow hydrodynamics using particle image velocimetry (PIV) measurements, ...

High Bending-Mode Sensitivity of Printed Piezoelectric Poly(vinylidenefluoride- co-trifluoroethylene) Sensors

© Copyright 2018 American Chemical Society. Printable piezoelectric sensors were fabricated on a flexible polyethylene terephthalate (PET) substrate. Solution-processed piezoelectric poly(vinylidenefluoride-co-trifluoroethylene) ink was used as an active layer. Evaporated silver on PET was used as the bottom electrode and the painted silver glue as the top electrode. The sensors were ...

Ultrafast Spontaneous Emission from a Slot-Antenna Coupled WSe<inf>2</inf>Monolayer

Optical antennas can enhance the spontaneous emission rate from nanoemitters by orders of magnitude, enabling the possibility of an ultrafast, efficient, nanoscale LED. Semiconductors would be the preferred material for such a device to allow for direct high-speed modulation. However, efficient nanoscale devices are challenging to implement because of high ...

Experimental Demonstration of A Low-Complexity Phase Noise Compensation for CO-OFDM Systems

IEEE In this letter, a low-complexity phase noise compensation scheme based on Kalman filtering theory is experimentally demonstrated for coherent optical orthogonal frequency division multiplexing (CO-OFDM) transmissions. The proposed scheme can operate in two modes, pilot-aided mode and blind mode, resulting in a variety of phase noise tracking configurations upon ...

Enriching Taxonomies with Functional Domain Knowledge

Knowledge hierarchies have become immensely useful and popular in a wide variety of fields owing to their applicability in structurally organizing and conveniently navigating information. A plethora of techniques have been developed to automatically build knowledge hierarchies from a variety of data sources. Nevertheless, maintaining such extensive knowledge bases and ...

Integration of New Concepts in Knowledge Hierarchies

Knowledge hierarchies have become immensely useful and popular in a wide variety of fields owing to their applicability in structurally organizing and conveniently navigating information. A plethora of techniques have been developed to automatically build knowledge hierarchies from a variety of data sources. Nevertheless, maintaining such extensive knowledge bases and ...

Massive Machine Type Communications over 5G using Lean Protocols and Edge Proxies

  • Benno S.
  • Bhatia R.
  • Esteban J.
  • Gupta B.
  • Lakshman T.
  • Samardzija D.
  • Tavares M.

We present a novel solution for Massive Machine Type Communications (mMTC) over wireless networks comprising of Edge Proxies and Lean Protocols. Our solution is designed to reduce the overheads associated with data exchange from massive number of low complexity, low power machine type devices. The solution allows the full richness ...

Physical Layer Security in TDD Massive MIMO

IEEE We consider a single-cell downlink time division duplex (TDD) based massive MIMO communication in the presence of an adversary capable of jamming and eavesdropping simultaneously. We show that massive MIMO communication is naturally resilient to no training-phase jamming attack in which the adversary jams only the data communication and ...

Inter-polarization mixers for coherent detection of optical signals

Electro-magnetic (EM) mixers are fundamental building blocks in communication systems. They are used in frequency/wavelength filters, interferometric modulators, amplitude-phase receivers, to name a few. Traditional EM mixers have two or more input ports and work only for co-polarized signal and local-oscillator (LO) incident on its inputs. Here we report on ...

A Novel Constellation Rotation Algorithm to Reduce Transmitter Noise

We propose a constellation phase rotation technique to mitigate digital-to-analog converters induced penalty. We demonstrate by simulations and experiments that our technique enables up to 1 dB of system signal-to-noise ratio improvement for 16-QAM signals. OCIS codes: (060.1660) Coherent communications;

A Novel Constellation Phase Rotation Method to Reduce Transmitter Noise in Metro Links

  • Almonacil S.
  • Jenneve P.
  • Layec P.
  • Ramantanis P.

IEEE We present a novel constellation phase rotation method to mitigate the DACs quantization penalty resulting from pre-compensation of chromatic dispersion (CD) in optical metro links where low-resolution digital-to-analog converters (DACs) may be used to be cost- and power-efficient. The CD-induced constellation rotation increases the peak-to-average power-ratio (PAPR) of the ...

Max-Lloyd Quantization of Geometrically and Probabilistically Shaped Circular QAM.

  • Almonacil S.
  • Jardel F.
  • Jenneve P.
  • Layec P.

We apply a Max-Lloyd quantization scheme for geometrically and probabilistically shaped circular QAM. We show that the signal-to-quantization-noise ratio at the DAC output can be improved up to +0.5 dB with a 4-bits DAC comparatively to the uniform quantizer.

Complex overlapping concepts: An effective auditing methodology for families of similarly structured BioPortal ontologies

  • Chen Y.
  • Elhanan G.
  • Geller J.
  • Ochs C.
  • Perl Y.
  • Zheng L.

In previous research, we have demonstrated for a number of ontologies that structurally complex concepts (for different definitions of ?complex?) in an ontology are more likely to exhibit errors than other concepts. Thus, such complex concepts often become fertile ground for quality assurance (QA) in ontologies. They should be audited ...

Slot switching for deterministic dynamic edge cloud networks

  • Benzaoui N.
  • Bigo S.
  • Dembeck L.
  • Gebhard U.
  • Lautenschlaeger W.
  • Pointurier Y.

We review how two optical slot switching technologies can provide end-to-end service guarantees in next generation edge-cloud-based networks: Optical Ethernet for fronthaul, midhaul and metro networks, and CBOSS for intra data center networking.

CBOSS: bringing traffic engineering inside data center networks

Today’s traditional, hierarchical, fullelectronic data centers cannot guarantee quality of service (QoS) for latency-sensitive applications or carrier-grade multitenancy.We propose cloud burst optical-slot switching (CBOSS), an intra-data center network architecture leveraging the original optical components and custom software- defined network (SDN) control to enable traffic engineering. In particular, we demonstrate network ...

Opportunistic Spatial Preemptive Scheduling For URLLC and eMBB Coexistence in Multi-User 5G Networks

  • Esswie A.
  • Pedersen K.

The fifth generation (5G) of the mobile networks is envisioned to feature two major service classes: ultra-reliable low-latency communications (URLLC) and enhanced mobile broadband (eMBB). URLLC applications require a stringent one-way radio latency of 1 ms with 99.999% success probability while eMBB services demand extreme data rates. The coexistence of ...

Parameter Identification of a Winding Function based Model for Fault Detection of Induction Machines

  • Huynh Van Khang
  • Kjell G. Robbersmyr
  • Pawlus W.
  • Surya Teja Kandukuri

Prediction of machines' faulty parts is important in industrial applications in order to reduce productivity losses. As far as electrical machines are considered, a model-based fault diagnosis approach is usually used for this purpose. The model is derived from the modified winding function theory and hence, it requires a considerable ...

Digital disruption of the AEC industry: technology-oriented scenarios for possible future development paths

© 2018 Aalto University Decision-makers in the architecture, engineering and construction (AEC) industry lack knowledge about the implementation of digitalization to generate value. We applied a scenario planning method developed by Schoemaker and Mavaddat to provide decision-makers with information for using digital data and technologies to create value for customers. ...

User Scheduling in Massive MIMO

  • Larsson E.
  • Yang H.

Massive MIMO relies on nearly orthogonal user channels to achieve unprecedented spectral efficiency. But in LoS (line-of-sight) environment some users can be subjected to similar channel vectors. Serving users with similar channel vectors simultaneously can severely compromise the throughput performance to all users. We propose a scheduler that identifies users ...