Cross-correlation based clustering and dimension reduction on multivariate time series for KPIs in a data processing system

  • Kovacs F.
  • Varga K.

In this paper, we investigate multi-dimensional time series data and we introduce a novel clustering approach based on the cross-correlation between the time series. The procedure is applied to Key Performance Indicators (KPIs) measured during a specific data processing system in order to identify connections between the various KPIs. The ...

Cross-correlation based clustering and dimension reduction on multivariate time series for KPIs in a data processing system

In this paper, we investigate multi-dimensional time series data and we introduce a graph based clustering approach using the cross-correlation between the time series. The procedure is applied to Key Performance Indicators (KPIs) measured during a specific data processing system in order to identify connections between the various KPIs. The ...

Tailor-made tuneable dielectric and optical characteristics of inorganic electro-chromic materials

  • Bulja S.
  • Kopf R.

Electro-chromic materials (EC) have the ability to reversibly change their optical properties by charge insertion/extraction and have, since their discovery by Deb, been chiefly used in applications related to display technology. Examples are many - smart windows and mirrors and active optical filters being some of them. Owing to their ...

Nonlinear Characterisation for Microstrip Circuits with Low Passive Intermodulation

  • Kozlov Dmitry
  • Schuchinsky A.
  • Shitvov A.

This paper presents a new methodology for experimental charaterisation of distributed nonlinearity in microstrip circuits fabricated on commercial grade microwave laminate materials. The circuits exhibit excessive intermodulation response when subject to relatively high power transmit multi-carrier waveforms. Weak intermodulation products generated in passive circuits may cause strong interference in the ...

An RNS-based forwarding approach to implement SFC

Because of the more and more diversified service, SFC needs to be dynamically and feasibly implemented. Thanks to NFV and SDN ideas, the new SFC architecture is defined to meet the requirements in the IETF. Based on the OpenFlow, the approach of the single flow table is used to implement ...

Network Service Descriptors as a Factory - Agile Networking for differentiating MSO Business Services

  • Acke W.
  • Fagadar M.
  • Six E.
  • Vanderstraeten H.

Orchestration has become an overloaded word in the industry. While Network Orchestration and Application Orchestration share a lot of technologies coming from the domains of SDN and NFV, the 2 approaches serve different objectives. The paper will specifically address Network Orchestration, aiming at launching new revenue generating Business Connectivity services ...

Sustained Throughput Requirements for Future Residential Broadband Service - Traffic Model for Bandwidth Estimates

  • Kapauan P.
  • Mukhopadhyay A.
  • Wellen J.

This paper presents a model to estimate the 10 years maximum sustained throughput requirements for residential broadband services. The model is used to estimate the maximum throughputs during busy hour and to assess how upper throughput percentiles compare to mean expected value.

High responsivity coherent photonic receiver integrating an SOA, a 90° hybrid and high speed UTC photodiodes

  • Achouche M.
  • Caillaud C.
  • Mekhazni K.
  • Paret J.
  • Pommereau F.
  • Santini G.

We demonstrate a monolithically integrated coherent receiver on an InP substrate with a SOA preamplifier, a 90° optical hybrid and four 40 GHz UTC photodiodes. Record performances with responsivity above 4 A/W with low imbalance <1 dB and error free detection of 32 Gbauds QPSK signals were simultaneously demonstated

High-speed InP Double Heterojunction Bipolar Transistor for three-dimensional terahertz computed tomography

  • Coquillat D.
  • Duhant A.
  • Dyakonova N.
  • Knap W.
  • Konczykowska A.
  • Nodjiadjim V.
  • Riet M.
  • Strauss O.
  • Triki M.

We have evaluated the performance of the InP double heterojunction bipolar transistor as a room temperature sensitive detectors for THz computed tomography applications in the 300 GHz transparency window.

Comparison of HEVC coding schemes for tile-based viewport-adaptive streaming of omnidirectional video

Virtual reality applications make use of 360-degree panoramic or omnidirectional video with high resolution and high frame rate in order to create the immersive experience to the user. The user views only a portion of the captured 360-degree scene at each time instant, hence streaming the whole omnidirectional video in ...

Detection of high intensity THz radiation by InP Double Heterojunction Bipolar Transistor

  • But D.
  • Coquillat D.
  • Dyakonova N.
  • Faltermeier P.
  • Ganichev S.
  • Knap W.
  • Konczykowska A.
  • Nodjiadjim V.
  • Olbrich P.
  • Riet M.
  • Teppe F.

We report on the photoresponse of 0.7-µm InP double heterojunction bipolar transistor to THz radiation of low and high intensities, when the collector is unbiased. At low intensities, the photoresponse is linear in radiation intensity. Under intense laser radiation, we observe a saturation at intensities > 15 kW/cm2, sample damaging ...

Visualization of the wake behind a sliding bubble

  • Davis I.
  • Grennan K.
  • Meehan R.
  • Murray D.
  • Nolan K.

In this work, Schlieren measurements are presented for the wake of an air bubble sliding under a heated, inclined surface in quiescent water to provide new insights into the intricate sliding bubble wake structure and the associated convective cooling process. This is a two-phase flow configuration that is pertinent to ...

Gate-Controlled Kondo Effect in a Single Molecule Transistor with Elliptical Ferromagnetic Leads

  • Hu T.
  • Scott G.

We present low temperature transport measurements of C60-based single molecule transistors fabricated using ferromagnetic break junction devices with planar elliptical leads, revealing a gate-modulated single channel spin-1/2 Kondo effect. The shape anisotropy and dipole interaction of the source and drain electrodes allows for the relative alignment of their respective magnetic ...

Investigating activity zones on smartphones: An empirical study with older adults

This paper investigates and extends existing knowledge on older adults' (65+) gestural interaction with smartphones. Specifically, it looks at the effect touch targets location has on older adults' performance of tap and swipe gestures. Two separate experiments, each with 40 participants, showed older adults' performance for tap is best toward ...

Edge Computing in the ePC --- A Reality Check

  • Abe Y.
  • Hadzic I.
  • Woithe H.

Mobile Edge Computing (MEC) has received much attention from the research community in recent years. A significant part of the published work has studied the telecom-centric MEC architecture, which assumes that the computing resource is located at the edge of the mobile access network (e.g., the Evolved Packet Core), typically ...

Over 15-Gb/s MIMO wireless transmission using ultra wideband antennas in SHF band

  • Chen Y.
  • Itoh T.
  • Kaneda N.
  • Li X.
  • Zhu C.

Wireless transmission over 15Gb/s data rate is reported using space diversity MIMO. Multi-diversity planar antennas are designed and fabricated to transmit and receive the radio frequency signal simultaneously in 2 radiation diversities. Reliable 15Gb/s indoor data transmission over 5m distance is demonstrated in the super high frequency band (SHF) between ...

5G E-band backhaul system measurements in urban street-level scenarios

  • Aronkyto K.
  • Du Z.
  • Kapanen J.
  • Ohlmer E.
  • Putkonen J.
  • Swist D.

More than half of the mobile backhaul connections are wireless and huge capacity promise of mmW bands is compelling to cope with the increasing data capacity for future 5G system. We reported a backhaul E-band measurement campaign focusing on radio system measurements with the demonstrator developed in the project. The ...

SDN-based service automation for IoT

  • Chang H.
  • Lakshman T.
  • Mukherjee S.
  • Uddin M.

Bluetooth Low Energy (BLE) is a personal area wireless network technology that is of increasing importance for emerging Internet of Things (IoT) deployments. By design, BLE supports short-range, single-hop communication between a pair of BLE devices. As such, native BLE does not allow network-based policy control or in-network functions for ...

vPROM: VSwitch enhanced programmable measurement in SDN

  • Chen S.
  • Guo Y.
  • Hao F.
  • Lakshman T.
  • Montgomery D.
  • Sriram K.
  • Wang A.

While being critical to the network management, the current state of the art in network measurement is inadequate, providing surprisingly little visibility into detailed network behaviors and often requiring high level of manual intervention to operate. Such a practice becomes increasingly ineffective as the networks grow both in size and ...

Vectoring-Based Dynamic Spectrum Management for G.fast Multi-User Full-Duplex Transmission

  • Lanneer W.
  • Maes J.
  • Moonen M.
  • Tsiaflakis P.

Full-duplex transmission is a new challenging technique emerging in DSL networks that may double the spectral efficiency by transmitting in the downstream (DS) and upstream (US) at the same time on identical frequencies. Unfortunately, this leads to severe near-end crosstalk (NEXT) interference in addition to the conventional far-end crosstalk (FEXT) ...