bluuebunny/crossref_metadata_2025 huggingface dataset:
Polarized micro-Raman study of 1- and 2-step ion-exchanged strengthened glass
Authors: Ebukuro Shingo , Terakado Nobuaki , Takahashi Yoshihiro , Fujiwara Takumi
Published: October 2020

We have investigated atomic-scale structures in 2-step ion-exchanged strengthened glasses by using polarized micro-Raman spectroscopy for non-destructive evaluation of the compressive stress.
Focusing Images through Large-Core Multimode Fibers and a Multimode Fiber Endoscope
Authors: Pellegrini Paloma E. S. , Jarschel Paulo F. , Pita Julian L. , Panepucci Roberto R. , Gabrielli Lucas H.
Published: October 2020

In a referenceless imaging setup with coherent light control based on a transmission matrix approach, an endoscope, composed of multimode fibers, is implemented in order to set focus at specific targets and enable structured illumination.
Metamaterial formalism approach advancing recognition of cancer
Authors: Gric Tatjana , Sokolovski Sergei G. , Navolokin Nikita , Glushkobskaya Oksana , Rafailov Edik U.
Published: October 2020

We present studies on the effective properties of mice biological tissues samples treating them as disordered metamaterial media aiming to identify cancerous areas in the mice brain tissue biopsies.
Perspectives of Using Two Terahertz Frequencies for Industrial Quality Control of Printable Electronics
Authors: Zhuldybina M. , Ropagnol X. , Bois C. , Zednik R. J. , Blanchard F.
Published: October 2020

We evaluated an analysis technique based on the uses of two THz frequency bands for the quality control of printed electronics. Our analysis does not depend on the phase information and could be coupled with compact continuous wave THz sources. After a proper calibration, this method can be implemented as a simple technique for industrial environment purpose.
Plasmonic Response of InSb Grating for Sensing Applications in the Terahertz Regime
Authors: Aghili Sina , Amini Aydin , Moridsadat Maryam , Dolgaleva Ksenia
Published: October 2020

A plasmonic structure based on Indium Antimonide for sensing applications has been investigated. We have used FDTD simulations for evaluating both scattering cross-section of the proposed structure and transmission spectra for its periodic array.
Air Gap/InP Distributed Bragg Reflectors for Mid-Infrared Applications
Authors: Suwito Galih R. , Mojaver Hassan R. , Quitoriano Nathaniel J.
Published: October 2020

We present a systematic study of air gap/InP distributed Bragg reflectors (DBRs) using transfer-matrix method. Reflectivity of various mid-infrared (6 µm) DBR design structures were calculated to obtain the optimum designs for different applications.
Electro-Optical Properties of Liquid Crystal Cells Enabled by Unconventional Alignment Layers
Authors: Garbovskiy Y. , Glushchenko A.
Published: October 2020

In this paper, unusual electro-optics and possible applications of nematic liquid crystals sandwiched between unconventional alignment layers are discussed. Two types of polymers, namely ferroelectric polymers and weakly conducting polymers are used as alignment layers.
Dopant Depth Distribution Effects on the Gain Profile of Avalanche Photodiodes Fabricated by Zn Diffusion
Authors: Pitts Oliver J. , Salehzadeh Omid , Hisko Matthew , Walker Alexandre W. , SpringThorpe Anthony J.
Published: October 2020

We show that areas of high edge gain in avalanche photodiodes are associated with locally enhanced diffusion depth by employing a novel method using scanning electron microscopy of selectively etched Zn diffused structures.
Self-Assembled Liquid-Crystal-Metasurfaces Controlling Deflection and Retardation of Light
Authors: Gorkunov M.V. , Kasyanova I.V. , Artemov V.V. , Ezhov A.A. , Mamonova A.V. , Simdyankin I.V. , Palto S.P.
Published: October 2020

Liquid-crystal-metasurfaces self-assemble on polymer films prepared by periodic and superperiodic FIB patterning. Optimizing their design we achieve precise control of the transmitted light phase and direction tunable by low-voltage electric pulses.
A Space Compression Optic
Authors: DelMastro Michael , Reshef Orad , Bearne Katherine , Alhulaymi Ali , Giner Lambert , Boyd Robert W. , Lundeen Jeff S.
Published: October 2020

We theoretically introduce a new optic, a plate that reduces propagation length for image formation. We experimentally demonstrate it advances a beam’s focus and shifts an obliquely incident beam identically to a longer propagation distance.
Low-Energy-Threshold Deep-Ultraviolet Generation in a Gas-Filled Single-Ring Hollow-Core Fiber
Authors: Xiong Daiqi , Luo Jiaqi , Hassan Muhammad Rosdi Abu , Chang Wonkeun
Published: October 2020

We demonstrate low-energy-threshold deep-ultraviolet generation in a gas-filled single-ring hollow-core fiber. We scale down the fiber through tapering to reduce the mode area and trigger the onset of deep-ultraviolet emission with a sub-200-nJ pump.
Broadband Tuning of Polarization Modulation Instability in Microstructured Optical Fiber through Thermal Heating
Authors: Loredo-Trejo A. , Díez A. , Silvestre E. , Andrés M. V.
Published: October 2020

Broadband tuning of polarization modulation instability in microstructured optical fibers is reported. Tunability is achieved by simultaneous birefringence-dispersion changes through thermal heating. 906 cm-1 frequency tunability range is attained.
Nonlinear fiber propagation of partially coherent fields exhibiting temporal correlations
Authors: AUDO Frédéric , RIGNEAULT Hervé , FINOT Christophe
Published: October 2020

Using photonic first-order differentiator applied on a partially coherent field, we generate two correlated temporal waveforms and experimentally study their correlation properties upon nonlinear propagation along the two orthogonal polarization axis of an optical fiber.
Non-Hermitian Dynamics Mimicked by a Fully Parametric Hybrid Nonlinear Optical System
Authors: Flemens Noah , Moses Jeffrey
Published: October 2020

We demonstrate that hybridization of OPA and idler SHG produces desirable nonlinear dynamics equivalent to OPA with idler loss, despite being a fully conservative system. Both systems take the form of a damped Duffing oscillator.
Saturable absorption using nonlinear multimode interference in chalcogenide fiber
Authors: Zhang Kaixuan , Rochette Martin
Published: October 2020

We demonstrate an all-fiber saturable absorber from nonlinear multimode interference in a chalcogenide fiber. The saturable absorber is used to mode-lock a fiber laser cavity tunable in the wavelength range of 1834-1895 nm.
Optical Parametric Oscillator based on All-Chalcogenide Fiber Components
Authors: Alamgir Imtiaz , Rezaei Mohsen , Rochette Martin
Published: October 2020

We report the first demonstration of an optical parametric oscillator build from the combination of two chalcogenide-based components. The gain medium is a chalcogenide microwire and the coupler is a chalcogenide fused fiber coupler.
Multi-resonant optical parametric oscillator without mirrors based on 1D and 2D-PPLT nonlinear photonic crystal
Authors: Ousaid S. Mohand , Chakaroun M. , Chang K. , Billeton T. , Peng L.-H. , Boudrioua A.
Published: October 2020

In this work, we demonstrate that it is possible to obtain an optical parametric oscillator with a simultaneous amplification of multiple frequencies using only a nonlinear photonic crystal with highly polished end-faces, preventing the utilization of external cavity mirrors.
Temporal Two-Component Solitons in Lithium Niobate Nano-Waveguides: Interaction with Dispersive Waves and Raman Shifts
Authors: Rowe William R. , Skryabin Dmitry V. , Gorbach Andrey V.
Published: October 2020

We present analysis of two component solitons in Lithium Niobate nano-waveguides considering quadratic and cubic nonlinearities. We examine the role of the second harmonic component in phenomena including Cherenkov radiation and Raman acceleration.
Heteronuclear Two Frequency Soliton Molecules
Authors: Melchert Oliver , Willms Stephanie , Bose Surajit , Morgner Uwe , Babushkin Ihar , Demircan Ayhan
Published: October 2020

We present novel robust bound states consisting of distinct components. Beside molecular properties like binding energy, dipole-like radiation, and dissociation, the concept enables trapped states analogous to an attractive quantum potential.
Beam Shaping In Optically Induced Nonlinear Volume Holograms
Authors: Liu S. , Mazur L. M. , Krolikowski W. , Sheng Y.
Published: October 2020

We present the first nonlinear volume holography based on 3D nonlinear photonic crystal. The optically induced 3D nonlinearity modulation enables efficient reconstruction of optical beams at new frequency with predesigned phase and amplitude structures.
Breathing dynamics of symmetry-broken polarized temporal cavity solitons in Kerr ring resonators
Authors: Hill Lewis , Xu Gang , Fatome Julien , Oppo Gian-Luca , Murdoch Stuart G. , Erkintalo Miro , Coen Stéphane
Published: October 2020

We report novel breathing dynamics of polarized symmetry-broken temporal cavity solitons in passive driven nonlinear resonators. We demonstrate experimentally the coexistence and also the possible spontaneous switching of two orthogonally-polarized breathers.
Experimental observation of bright temporal cavity solitons enabled by third-order dispersion
Authors: Li Zongda , Coen Stéphane , Murdoch Stuart G. , Erkintalo Miro
Published: October 2020

We report the observation of bright cavity solitons in Kerr resonators driven in the normal dispersion regime. The solitons are enabled by third-order dispersion, and could permit novel sources of ultrashort pulses or frequency combs.
Dynamics of localized patterns in doubly resonant dispersive optical parametric oscillators
Authors: Parra-Rivas P. , Mas-Arabí C. , Leo F.
Published: October 2020

We study the appearance of localized patterns in degenerate optical parametric oscillators in a doubly resonant configuration. We find that in some parameter regimes these states undergo oscillatory instabilities which make them breathe.
The pure-quartic soliton laser: leveraging high-order dispersion in mode-locked lasers
Authors: Runge Antoine F. J. , Hudson Darren D. , Tam Kevin K. K. , de Sterke C. Martijn , Blanco-Redondo Andrea
Published: October 2020

We report the first laser emitting pure-quartic solitons, temporal optical solitons arising from the balance of Kerr nonlinearity and fourth-order dispersion. We demonstrate that these pulses follow new energy-width scaling.
Theoretical Analysis of Signal Amplification in Fiber Lasers with Cavity Dumping
Authors: Shtyrina O.V. , Yarutkina I.A. , Skidin A.S. , Fedoruk M.P.
Published: October 2020

We present the theoretical analysis of fiber lasers with cavity dumping with the small number of active fiber cells inside the cavity in order to find the optimal gain efficiency in such systems.
Localized States in Phase-Matched Doubly-Resonant Second-Harmonic Generation
Authors: Arabí C. Mas , Parra-Rivas P. , Leo F.
Published: October 2020

We analyze the formation of temporal localized structures in phase-matched cavity-enhanced second-harmonic generation, focusing on the limit where the fundamental and generated are group-velocity matched. We study the impact of the walk-off on these structures.
Generation of Two-Color Platicons in χ(2) Microresonators
Authors: Lobanov Valery E. , Kondratiev Nikita M. , Shitikov Artem E. , Galiev Ramzil R. , Bilenko Igor A.
Published: October 2020

We demonstrate numerically generation of two-color platicons in χ(2) microresonators via pump modulation or mode interaction for both SHG and optical parametric oscillations. Excitation conditions are revealed for discussed generation methods and medium parameters.
Waveguide optomechanics – coherent control of acoustic waves
Authors: Stiller B.
Published: October 2020

Stimulated Brillouin scattering (SBS) is an optomechanical interaction involving traveling acoustic waves. In recent experiments, we demonstrated how to coherently control acoustic waves via SBS and to counteract the nanosecond acoustic decay time.
Enhancement, Suppression and Chaotic Behavior in Optomechanical Oscillations in Hollow Resonators
Authors: –Mecho Xavier Rosello , Frigenti Gabriele , FArnesi Daniele , Delgado-Pinar Martina , Andrés Miguel V. , Righini Giancarlo , Conti Gualtiero Nunzi , Soria Silvia
Published: October 2020

We report on the experimental analysis of parametrical optomechanical oscillations and nonlinear frequency generation in hollow phoxonic whispering gallery mode resonators. Both phenomena can be enchanced or suppressed and showed chaotic behavior.
A Compact Linear-Cavity Multi-wavelength Praseodymium Fiber Laser by Stimulated Brillouin Scattering
Authors: Samion Muhamad Zharif , Kamely Aizuddin Ahmad , Ahmad Harith
Published: October 2020

We demonstrate a multi-wavelength Praseodymium-doped fiber laser at 1302 nm in a linear cavity. 13 significant Brillouin stokes with a channel spacing of ~0.07 nm are obtained through the stimulated Brillouin scattering effect.
MoS2 monolayer coupled to a multi-resonant dielectric metasurface exhibiting enhanced second-harmonic generation
Authors: Löchner Franz J. F. , George Antony , Koshelev Kirill , Bucher Tobias , Najafidehaghani Emad , Fedotova Anna , Choi Duk Yong , Pertsch Thomas , Staude Isabelle , Kivshar Yuri , Turchanin Andrey , Setzpfandt Frank
Published: October 2020

We experimentally analyze enhancement of second-harmonic generation from CVD-grown MoS2 monolayers coupled to a Si metasurface exhibiting different resonances and reveal how different resonant fields influence the nonlinear conversion efficiency.
Two-Octave OAM17,1 Supercontinuum Generation in Air-Core Chalcogenide Ring Fiber
Authors: Wang Yingning , Bao Changjing , Jiang Jicong , Fang Yuxi , Geng Wenpu , Wang Zhi , Zhang Weigang , Huang Hao , Ren Yongxiong , Pan Zhongqi , Yue Yang
Published: October 2020

Two-octave supercontinuum genaration carrying high-order OAM beam (|l|=17) is achieved using 6-mm air-core As2S3 ring fiber. To the best of our knowledge, it is the highest-order OAM supercontinuum ever generated in optical fiber.
Symmetry breaking in coherently driven-dissipative coupled nanocavities
Authors: Garbin Bruno , Giraldo Andrus , Broderick Neil G. R. , Krauskopf Bernd , Marconi Mathias , Levenson Ariel , Raineri Fabrice , Yacomotti Alejandro M.
Published: October 2020

We report on the first experimental observation of mirror symmetry breaking in coherently driven-dissipative coupled nanocavities. Our results pave the way to the experimental study of symmetry breaking at low photon number.
Femtosecond anti-Stokes conical emission in BK-7 glass and O and E-wave calcite
Authors: Meyer Henry J. , Alfano Robert R.
Published: October 2020

The angle of anti-Stokes conical emission (CE) is experimentally measured in the frequency shift span of

2000

c
m

−
1

to

9000

c
m

−
1

. The experiment was performed using a 800 nm 50 fs laser pump in samples of BK-7 glass and calcite in both the O and E-wave configurations. The experimental results of angular emission are then compared to three competing models: the Alfano–Shapiro four wave mixing (FWM) model from 1970, the Luther FWM model from 1994, and the Faccio X-wave model from 2004. Results indicate that in all samples and configurations tested, the original FWM has the best agreement with experimental results in the anti-Stokes span.
All-fiber mode-locked ytterbium-doped fiber laser with a saturable absorber based on the nonlinear Kerr beam cleanup effect
Authors: Zhang Baofu , Ma Shanchao , Lu Sihua , He Qiurun , Guo Jing , Jiao Zhongxing , Wang Biao
Published: October 2020

We theoretically and experimentally demonstrate a novel, to the best of our knowledge, mode-locked ytterbium-doped fiber laser with a saturable absorber based on the nonlinear Kerr beam cleanup effect. The saturable absorber was formed by a 2-m graded-index multimode fiber, and a single-mode fiber segment served as a diaphragm. With an all-normal-dispersion-fiber configuration, the laser generated dissipative soliton pulses with pulse duration of 26.38 ps and pulse energy more than 0.25 nJ; output pulses could be compressed externally to 615.7 fs. Moreover, the self-starting mode-locking operation of this laser exhibited a high stability with a measured signal-to-noise ratio of 73.4 dB in the RF spectrum.
Theoretical Analysis of Superchannel Signal Transmission in Nonlinear Fiber Links
Authors: Skidin A. , Sidelnikov O.S. , Fedoruk M.P.
Published: October 2020

We propose the analytical method to predict the signal transmission quality in nonlinear fiber links as a function of the initial signal. Using the proposed method, we perform probabilistic shaping-based optimization of OFDM-superchannel.
Wavelength Swapping Scheme to Eliminate Reflected Light in Bidirectional WDM-PON
Authors: Hisano Daisuke , Shibita Sho , Mishina Ken , Nakayama Yu , Maruta Kazuki , Maruta Akihiro
Published: October 2020

This paper proposes a novel wavelength swapping technique to eliminate the reflection lights and improves link budget when employing a single wavelength bidirectional WDM-PON. We report more than 10-dB improvement of the link budget.
Long-Period Gratings Written in Few-Mode Optical Fiber by Ultraviolet Laser Exposure
Authors: Mizunami Toru
Published: October 2020

Long-period gratings in few-mode fiber were fabricated with exposure using a KrF laser. Spectral measurements on attenuation for LP01 and LP11 modes were performed with offset-launch technique. The coupling wavelengths depended on launched modes.
Building Large-Scale Programmable Photonic Circuits Using Silicon Photonic MEMS
Authors: Bogaerts Wim , Edinger Pierre , Takabayashi Alain Yuji , Zand Iman , Chen Xiangfeng , Wang Xiaojing , Sattari Hamed , Verheyen Peter , Jezzini Moises A. , Talli Giuseppe , Kumar Saurav , Porcel Marco Garcia , Ribeiro Antonio , Jo Gaehun , Quack Niels , Gylfason Kristinn B. , Niklaus Frank , Khan Umar
Published: October 2020

Programmable photonic circuits electronically reconfigure the flow of light on a chip. This requires hundreds or thousands of phase shifters and tunable couplers. Silicon photonic MEMS offer both high integration density and low power consumption.
A Photonic Accelerator for Feature Map Generation in Convolutional Neural Networks
Authors: De Marinis Lorenzo , Nesti Federico , Cococcioni Marco , Andriolli Nicola
Published: October 2020

We propose a photonic accelerator for convolutional neural networks carrying out linear, nonlinear, and pooling operations. It achieves an excellent accuracy in TensorFlow simulations and is more energy efficient than state-of-the-art electronics.
Polymer-based Optical Switch for Future Metro-area Networks
Authors: Jung Hyun-Do , Shin Jang-Uk , Park Sang-Ho , Han Young-Tak , Lee Seo-Young , Baek Yongsoon
Published: October 2020

We have developed a polymer-based optical switch with low loss and low power consumption for future metro-area networks, considering the cost-effectiveness and productivity. For that, the low-cost spin-coating process of shallow ridge polymer waveguide and the flip-chip bonding technology have been employed in the switch.
Characterization and ENOB Analysis of a Reconfigurable Linear Optical Processor
Authors: De Marinis Lorenzo , Liboiron-Ladouceur Odile , Andriolli Nicola
Published: October 2020

The characterization of a broadband low-loss 4×4 MZI-based reconfigurable linear optical processor is reported. The impact of MZI extinction ratio on the effective number of bits (ENOB) at the device output is also investigated.
Photonic lanterns: an enabling mode-switch technology
Authors: Leon-Saval Sergio G.
Published: October 2020

Advances and implementation of multimode photonics systems require new enabling tools. Photonic lantern is an all-optical multimode photonic device that allows for broadband low-loss mode switching and conversion in multimode optical systems.
Integrated Microwave Photonic Spectrum Shaping
Authors: Daulay Okky , Eijkel Maarten , Guo Xin , Liu Gaojian , Marpaung David
Published: October 2020

We discuss a new concept in integrated microwave photonics (MWP) aiming at complex phase and amplitude tailoring of RF modulated spectrum for advanced functionalities including modulation transformation and all-optimized MWP filtering.
Carrier injection efficiency in III-nitride light emitting diodes: effective potential correction
Authors: Witzigmann Bernd , Römer Friedhard
Published: October 2020

A model for carrier injection efficiency of III-nitride based light emitters with multiple quantum wells is described. With a combination of semi-classical and quantum transport, it matches a wide range of experimental LED data for solid-state lighting.
Simulating bifacial perovskite/silicon tandem solar cells in large PV fields
Authors: Jäger Klaus , Tillmann Peter , Katz Eugene A. , Becker Christiane
Published: October 2020

We report on simulations of idealized bifacial perovskite/silicon tandem solar cells which are placed in a large PV field. These simulations are used to perform energy-yield optimizations for two- and four-terminal tandem cell configurations.
Additive Multi-Element Optical Designs for Enhanced Light Trapping and Solar Collection
Authors: Alsaigh Rakan E. , Bauer Ralf , Lavery Martin P.J.
Published: October 2020

The desire to increase the efficiency of solar panel has driven research into various approaches to trap-light. We present additive multi-element optical designs that improve daily solar absorption beyond leading integrated light-trapping techniques.
UV-Ozone Oxide Treatment for Improved Surface Passivation
Authors: Gao Munan , Schoenfeld Winston , Zin Ngwe
Published: October 2020

Surface passivation is a key process to achieve high-efficiency in silicon solar cells. In this paper we applied UV-ozone treatment to achieve high-quality passivation on both planar and textured, n-type and p-type wafers.
2D Materials-based Optoelectronic Devices
Authors: Islam Kazi , Ismael Tim , Synowicki Ron , Escarra Matthew
Published: October 2020

Optical properties of 2D MoS2 have been investigated and used to design optoelectronic devices. Photodetectors and photovoltaic devices, fabricated with symmetric and asymmetric metal contacts, show high photoresponsivity and open-circuit voltage, respectively.
SPR induced photoluminescne quenching in Quantum MAPbBr3 -QD/TiO2 inteface
Authors: Seshaiah Katta Venkata , Chouhan Lata , Biju Vasudevanpillai , Raavi Sai Santhosh Kumar
Published: October 2020

Herein, we describe a facile method to introduce SPR-effect in MAPbBr3 -QDs/TiO2 interface. SPR enabled efficient electron-transfer is confirmed by photoluminescence (PL) quenching and short PL lifetimes (3.4 ns) of MAPbBr3 from TiO2/Au-NPs/MAPbBr3-QD thin film.
OH Diffusion Control in the Shaped Optical Fiber Preforms Based on CO2 Laser
Authors: Jasim Ali A. , Podrazký Ondřej , Peterka Pavel , Todorov Filip , Kamrádek Michal , Honzátko Pavel
Published: October 2020

Removing ~200 µm of preforms surface by hydrofluoric acid before CO2 laser shaping can reduce the attenuation attributed to OH diffusion of 81 dB/km (43%) compared to the nonetched shaped performs.
Multifunctional bioresorbable phosphate glass optical fibers for theranostics
Authors: Milanese Daniel , Gallichi-Nottiani Duccio , Pugliese Diego , Boetti Nadia G. , Janner Davide
Published: October 2020

We report on the design and development of microstructured phosphate glass optical fibers for minimally invasive diagnosis and therapy. We discuss preliminary results of fiber drawing and characterization.
Depressed-Cladding Bi-doped P2O5 – SiO2 Fiber For Efficient Optical Devices Operating Near 1.3 μm
Authors: Firstova Elena , Kharakhordin Alexander , Alyshev Sergey , Khegai Aleksandr , Melkumov Mikhail , Firstov Sergei
Published: October 2020

We investigated the optical properties of a depressed-cladding bismuth-doped phosphosilicate fiber. The performance characteristics of CW laser and optical amplifier operating within the O-band based on this fiber were studied.
Highly resolved interferometric measurement of refractive index difference between two silica-based materials
Authors: Leconte Baptiste , Dauliat Romain , Malleville Marie-Alicia , Jamier Raphaël , Tanzilli Sébastien , Labonté Laurent , Schwuchow Anka , Wondraczek Katrin , Roy Philippe
Published: October 2020

A new method has permitted the measurement of the refractive index difference between two silica-based materials with an unprecedented accuracy of ±1.10-5thanks to a novel fiber design associated with a classic Mach-Zehnder interferometer.
Low-distortion amplification of single channel QPSK/16QAM signals using SOA with HBeam
Authors: Aneesh Sobhanan , Deepa Venkitesh
Published: October 2020

We demonstrate 11 dB saturated gain from an SOA for single-channel 21 Gbaud QPSK and 16QAM signals with minimized phase distortion using a holding beam in the non-transparency wavelength.
High-Power 4.8 THz RTD-Based Oscillator with Tunable Graphene Antenna for 6G Mobile Networks
Authors: Nobrega Rafael , Duarte Ulysses , Raddo Thiago , Dayoub Iyad , Haxha Shyqyri , Jurado-Navas Antonio , Sanches Anderson , Loiola Murilo
Published: October 2020

A 4.8 THz RTD oscillator with integrated tunable graphene antenna with 1 mW (0 dBm) power transmissions is proposed. This device is a candidate to generate THz signals with adequate power budget for 6G networks.
Fast Deep Learning based Multicarrier Phase Response Estimation in Non-Flat Frequency Response Channels
Authors: Cortés Claudia L. , González Neil Guerrero
Published: October 2020

Fast phase-response channel estimation based on training of convolutional neural networks over graphical patterns of distorted constellation diagrams is proposed. We experimentally verified this method in a 1.2m BNC cord using 6 sub-bands located between 150kHz and 276kHz.
Optical Fiber Equalization of Complex Valued Signals using Real-Valued Neural Networks
Authors: Paryanti Gil , Sadot Dan
Published: October 2020

A method for optical fiber equalization using neural network is proposed. The method uses digital up-conversion for processing the complex valued signal with significant reduction in network size without impact on equalization performance.
Massive parallelism Fourier-optic convolutional processor
Authors: Miscuglio Mario , Hu Zibo , Li Shurui , Gu Jiaqi , Babakhani Aydin , Gupta Puneet , Wong Chee-Wei , Pan David , Bank Seth , Dalir Hamed , Sorger Volker J.
Published: October 2020

Here we report a massively-parallel Fourier-optics convolutional processor accelerated 160x over spatial-light-modulators using digital-mirror-display technology as input and kernel showing an MNIST and CIFAR-10 accuracy of 96% and 54%, respectively.
Benefit of Prime Factor FFTs in Fully Parallel 60 GBaud CDC Filters
Authors: Bae Cheolyong , Larsson-Edefors Per , Gustafsson Oscar
Published: October 2020

Prime factor algorithms are beneficial in fully parallel frequency-domain implementation of CDC filters and enable a more continuous scaling of filter lengths. ASIC implementation results in 28-nm CMOS for 60 GBd are provided.
Photonic Symbol Masking Using Optical Encryption Key Generator for Secure Optical Regenerative Repeaters
Authors: Kodama Takahiro
Published: October 2020

Secure photonic symbol masking using XPM at the optical regenerative repeater node was experimentally demonstrated for the first time. The measured BER performances of 10 GSymbol/s coherent BPSK signal show FEC limit achievement.
Challenges and Trade-offs in Real-Time Implementation of DSP for Coherent Transmission
Authors: Larsson-Edefors Per
Published: October 2020

We review different real-time implementation platforms for digital signal processing. We discuss circuit implementation of coherent receivers and design trade-offs involving circuit complexity, throughput and power dissipation.
Hospitality artisan entrepreneurs’ perspectives of sustainability
Authors: Stansfield Maree L. , McIntosh Alison , Poulston Jill
Published: October 2020

Artisan entrepreneurs are argued to be creative disruptors of business norms influencing societal, political and economic change. Yet, studies of small- and medium-sized hospitality artisan enterprises are few, especially studies of their sustainability practice. This interpretive study used qualitative in-depth interviews with eight New Zealand hospitality operators who are deemed artisan entrepreneurs to glean exploratory insights into their perspectives of sustainability in their enterprises. Thematic analysis revealed four overarching conceptual themes that captured the artisans’ journeys against the tide of conventional business mores towards sustainable practice. The themes were the backstory, a road less travelled, tribe of journey-makers and rewards of the journey. The findings highlight that the sustainable hospitality business model demands much more than the conventional equivalent. As such, the findings reveal a sustainability consciousness as the driving motive and important starting point. The study also provides some evidence to confirm hospitality artisan entrepreneurs as creative disruptors in the global sustainable business agenda.
Extremismo climático y peligro biológico en el sureste español (1780-1800)
Authors: García Torres Adrián
Published: October 2020

La presente contribución analiza el impacto que tuvo la inestabilidad climática que en el Hemisferio Norte se desarrolló durante las últimas décadas del siglo XVIII. El área de análisis se circunscribe al sureste de español, poniendo el acento en el sur alicantino. Se estudian los períodos de sequía y de exceso pluviométrico acaecidos, así como sus repercusiones socioeconómicas. De igual manera, se realiza con los problemas biológicos surgidos en este período, tales como brotes de paludismo y plagas de langosta.
The role of Artificial Intelligence and distributed computing in IoT applications
Authors:   Universidad de Salamanca, Casado Vara Roberto , Rodríguez Gonzalez Sara , Prieta Pintado Fernando De la
Published: October 2020

The exchange of ideas between scientists and technicians, from both academic and business areas, is essential in order to ease the development of systems which can meet the demands of today’s society. Technology transfer in this field is still a challenge and, for that reason, this type of contributions are notably considered in this compilation. This book brings in discussions and publications concerning the development of innovative techniques of IoT complex problems. The technical program focuses both on high quality and diversity, with contributions in well-established and evolving areas of research. Specifically, 10 chapters were submitted to this book. The editors particularly encouraged and welcomed contributions on AI and distributed computing in IoT applications. The editors are specially grateful for the funding supporting by the project “Virtual-Ledgers-Tecnologías DLT/Blockchain y Cripto-IOT sobre organizaciones virtuales de agentes ligeros y su aplicación en la eficiencia en el transporte de última milla”, ID SA267P18, financed by regional government of Castilla y León and FEDER funds.
Programas de indução que mantêm os novos professores ensinando e melhorando
Authors: Wong Harry K.
Published: October 2020

Tradução do original WONG, Harry K. “Induction Programs That Keep New Teachers Teaching and Improving”. NASSP Bulletin – Vol. 88 No 638 March 2004. © Harry K. Wong Publications, Inc. por Adriana Teixeira Reis.
Este artigo apresenta escolas e distritos escolares com programas bem sucedidos de indução, todos facilmente replicáveis. Cada vez mais, a pesquisa confirma que o professor e a qualidade do ensino são os mais poderosos preditores do sucesso do aluno. Em suma, os diretores garantem maior desempenho dos alunos, garantindo melhor ensino. Para fazer isso, os administradores eficazes têm um novo programa de indução de professores disponível para todos os professores recém-contratados, que então se torna parte do programa de desenvolvimento profissional sustentado ao longo da vida para o distrito ou escola. O que mantém um bom professor são programas estruturados, constantes e intensivos de desenvolvimento profissional que permitem que os novos professores observem outros, sejam observados por outros e façam parte de redes ou grupos de estudo onde todos os professores compartilham juntos, crescem juntos e aprendem a respeitar o trabalho um do outro.
Políticas de indução para professores iniciantes: a experiência chilena e os desafios para América Latina
Authors: Eugenio Beca Carlos , Boerr Ingrid
Published: October 2020

O tema da indução dos professores principiantes vem ganhando relevância nas políticas educativas orientadas para o desenvolvimento da profissão docente. O presente artigo tem por objeto contribuir para a reflexão sobre os desafios da indução aos docentes que se iniciam no exercício da profissão na América Latina. Apresenta-se uma reflexão a respeito da necessidade de gerar os dispositivos necessários para apoiar os docentes durante sua inserção no exercício profissional e uma breve discussão sobre as distintas estratégias e modelos de acompanhamento ou mentoria. Além de apresentar brevemente algumas experiências realizadas em países latino-americanos, se foca na experiência desenvolvida no Chile, desde seu início no começo dos anos 2000 até os últimos avanços a partir da Lei que cria o Sistema de Desenvolvimento Profissional Docente, que considera um sistema nacional de indução, reconhecendo o direito de todas as professoras e professores iniciantes a receberem um acompanhamento mediante mentores com experiência docente e formação especializada. O artigo culmina com uma reflexão acerca do caminho percorrido e os desafios que impõem os novos cenários educativos para o ingresso dos docentes ao seu exercício profissional.
Evaluation of the bond strength of orthodontic brackets and the degree of polymerisation and microhardness of an orthodontic adhesive using polyvawe light curing unit and varying light densities
Authors: Topbasi Nuri Mert , Benkli Yasin Atakan
Published: October 2020

Objective: This study evaluates the shear bond strength (SBS) and Vickers micro-hardness (VHN) of the orthodontic adhesive resin Transbond XT using thermocycled samples. The study also measures the degree of cure by poliwave light curing unit Valo. Materials and Methods: 135 brackets were bonded for the SBS test, and 90 disc-shaped orthodontic adhesive resins were prepared for the VHN test. The measurements were taken either immediately or after 500 or 10.0000 thermocycling. The SBS and VHN test data were statistically evaluated using a Two-way ANOVA and Tukey multiple comparison tests. The degree of conversion (DC) was measured by FTIR. Results: The 10-sec polymerized control group (57.08) and the 10.000 termocycled samples (55.96) had the highest VHN scores. On the other hand, the 3 second polymerized and the 10.000 termocycled samples (39.22) had the lowest VHN scores. There was no significant difference in the bracket SBS values between the termocycled and immediate groups. An evaluation of the bond failure surfaces revealed that the ARI scores did not differ between the immediate and the thermo-cycled groups according to the power modes. The FTIR results revealed that the lowest DC was seen in the 3 second light-cured sample. Conclusion: Transbond XT provided sufficient bonding in terms of microhardness and DC under in vitro bracket bonding conditions after 10 and 8 seconds of Poliwave LED curing. However, low mean values were seen in the groups that received Poliwave LED curing for only 3 seconds. KEYWORDSARI score; FTIR; Light-Emitting Diode; Orthodontics; Thermocycling.
Clinical Functional Lumen Imaging Probe Testing in Esophageal Disorders: A Need for Better Quality Evidence
Authors: Massey Benson T.
Published: October 2020

In their article “Use of the Functional Lumen Imaging Probe in Clinical Esophagology,” Savarino et al. report the outcomes of a Grading of Recommendations Assessment, Development, and Evaluation analysis performed by experts in the use of functional lumen imaging probe (FLIP) evaluation of esophageal disorders. For essentially all clinical indications, the recommendation for use was conditional with a very low quality of evidence. FLIP is an expensive, invasive technology examining limited aspects of esophageal function. Its role in complementing or replacing existing technology is uncertain, particularly when compared with manometric testing with additional provocative studies. Performing properly designed studies to demonstrate FLIP's true effectiveness and cost-effectiveness will be costly.
Noninvasive Diagnosis of Portal Hypertension in Patients With Compensated Advanced Chronic Liver Disease
Authors: Pons Monica , Augustin Salvador , Scheiner Bernhard , Guillaume Maeva , Rosselli Matteo , Rodrigues Susana G. , Stefanescu Horia , Ma Mang M. , Mandorfer Mattias , Mergeay-Fabre Mayka , Procopet Bogdan , Schwabl Philipp , Ferlitsch Arnulf , Semmler Georg , Berzigotti Annalisa , Tsochatzis Emmanuel , Bureau Christophe , Reiberger Thomas , Bosch Jaime , Abraldes Juan G. , Genescà Joan
Published: October 2020

INTRODUCTION:

We aimed to explore the prevalence of portal hypertension in the most common etiologies of patients with compensated advanced chronic liver disease (cACLD) and develop classification rules, based on liver stiffness measurement (LSM), that could be readily used to diagnose or exclude clinically significant portal hypertension (CSPH) in clinical practice.

METHODS:

This is an international cohort study including patients with paired LSM/hepatic venous pressure gradient (HVPG), LSM ≥10 kPa, and no previous decompensation. Portal hypertension was defined by an HVPG >5 mm Hg. A positive predictive value ≥90% was considered to validate LSM cutoffs for CSPH (HVPG ≥10 mm Hg), whereas a negative predictive value ≥90% ruled out CSPH.

RESULTS:

A total of 836 patients with hepatitis C (n = 358), nonalcoholic steatohepatitis (NASH, n = 248), alcohol use (n = 203), and hepatitis B (n = 27) were evaluated. Portal hypertension prevalence was >90% in all cACLD etiologies, except for patients with NASH (60.9%), being even lower in obese patients with NASH (53.3%); these lower prevalences of portal hypertension in patients with NASH were maintained across different strata of LSM values. LSM ≥25 kPa was the best cutoff to rule in CSPH in alcoholic liver disease, chronic hepatitis B, chronic hepatitis C, and nonobese patients with NASH, whereas in obese NASH patients, the positive predictive value was only 62.8%. A new model for patients with NASH (ANTICIPATE-NASH model) to predict CSPH considering body mass index, LSM, and platelet count was developed, and a nomogram was constructed. LSM ≤15 kPa plus platelets ≥150 × 109/L ruled out CSPH in most etiologies.

DISCUSSION:

Patients with cACLD of NASH etiology, especially obese patients with NASH, present lower prevalences of portal hypertension compared with other cACLD etiologies. LSM ≥25 kPa is sufficient to rule in CSPH in most etiologies, including nonobese patients with NASH, but not in obese patients with NASH.
Varying the Preparation Guide and Group Discussion in a Classroom Analysis of Interteaching
Authors: Gayman Catherine M , Jimenez Stephanie T
Published: October 2020

Interteaching is a strategy that shifts the emphasis from passive student learning to active engagement through the use of preparation guides, small group discussions, clarifying lectures, and frequent testing. Several classroom studies have demonstrated that interteaching leads to better student comprehension and higher test scores. However, the specific strategies used in these studies vary slightly. The goal of the present study was to compare two different ways of implementing the preparation guide and group discussions to determine which method led to higher academic success. A group design was used in two sections of a psychology course over two semesters. One section experienced the standard interteaching method, where students completed the entire preparation guide prior to class and engaged in small group discussions during class. The second section was divided into two groups and each group was given half of the preparation guide to complete. Students, then, went through two rounds of group discussions: first, in a dyad with a member that completed the same portion of the preparation guide and then in a larger group with another dyad who completed the other portion of the preparation guide. Students in the second section scored more points on exam questions that came from their half of the preparation guide and they demonstrated less of a preference for interteaching than those who experienced the standard interteaching method. Results from this study indicate that instructors should have students read and complete the entire preparation guide to allow for more effective implementation of interteaching.
Clothed wax effigies: construction materials, challenges and suggestions for preventive conservation
Authors: Karydis Christos , Kyriazi Evangelia , Staka Christina-Alkisti
Published: October 2020

Wax effigies, fully dressed life-size models of human figures, have been constructed since the medieval times. The construction materials of historical effigies differ to the contemporary ones, yet the construction process of the wax parts has more or less remained unchanged over the centuries. This paper starts with the history, construction materials and manufacture techniques of wax effigies. The inseparable relation of the wax effigies and their costumes is explained, and the characteristics and deterioration agents of their most important construction materials are presented in order to understand their needs for preservation, with emphasis on wax and fabrics. The aim of this paper is to suggest preventive conservation guidelines for wax effigies, with proposals for appropriate environmental conditions during display and storage, and suggestions for proper handling, storage and transportation. Advice for disaster preparedness and actions in cases of emergency situations is also provided.
ANALISIS FAKTOR-FAKTOR YANG MEMENGARUHI KEMUNGKINAN TERJADINYA SALAH KELOLA ASET TETAP DITINJAU DARI PERSPEKTIF FRAUD DIAMOND THEORY (STUDI EMPIRIS PADA PERANGKAT DAERAH KABUPATEN SEMARANG)
Authors: Ambarwati Juni , Handayani Rr Sri
Published: October 2020

This study aims to analyze the factors that influence the occurance possibility ofmismanagement of fixed assets by the state civil apparatus. This study based on the FraudDiamond theory developed by Wolfe and Hermanson (2004). This study discussesmismanagement of fixed assets from the point of view of regional civil apparatus in theSemarang District Government. The population of this study is all regional civil apparatus inthe Semarang District Government by census method. This research was conducted usingprimary data. Primary data in this study used a questionnaire (questionnaire) to measure thevariables of financial pressure, habit pressure, work relationship pressure, pressure of otherfactors, perception of opportunity, general rationalization, authorization of functions,intelligence, ego and beliefs, coercion and fraud, ability to handle stress to fraud andmismanagement of fixed assets. The sample in this study amounted to 256 regional devices inthe Semarang District Government. The data obtained were analyzed by using multiple linierregression. Based on the results of the analysis carried out, it was concluded that 6variables: financial pressure, habit pressure, work relationship pressure, pressure of otherfactors, general rationalization, coercion and fraud to commit fraud had a positive effect tothe occurance possibility of mismanagement of fixed assets. Then, the ability to handle stresswhen committing fraud has a negative effect to the occurance possibility of mismanagementof fixed assets, while other variables namely perception of opportunity, position authorizationto commit fraud, intelligence to commit fraud and ego and confidence to commit fraud do nothave influence to the mismanagement of fixed assets by regional equipment.
HMM-Based Secure Framework for Optical Fog Devices in the Optical Fog/Cloud Network
Authors: Sood Sandeep K. , Deep Singh Kiran
Published: October 2020

In the present optical fog/cloud computing environment, optical line terminals and optical network units are used as the most promising optical fog devices (OFDs). The inherent characteristics of fog computing provide certain granted privileges to the attacker to hack devices and make them malicious. Also, existing security solutions generate false alarms that affect the performance of the underlying network. In this paper, a secure framework is proposed that not only predicts the malicious OFDs but also reduces false alarms. Hidden Markov model and intrusion detection system are used to detect the malicious one by computing the probability of shifting (POS) and then shift it to the virtual honeypot which is kept hidden by deploying it at the optical fog layer. In addition, it also reduces the generation of false alarm and logs all malicious activities for further analysis. In the experiment section, Python is used to validate the proposed framework. Further, HMM is simulated and tested in the MATLAB to reduce the false alarm rate. Results show that the proposed framework effectively reduces the false alarms and detects the malicious one and then shifts it onto the virtual honeypot efficiently.
Mortalidad y supervivencia por cáncer cervicouterino en beneficiarias del Seguro Popular en el estado de San Luis Potosí, México. Periodo 2005-2012
Authors: Terán Figueroa Yolanda , García Díaz Janeth , González Rubio Marco Vinicio , Gaytán Hernández Darío , Gutiérrez Rnríquez Sandra Olimpia
Published: October 2020

Se analizó la mortalidad y supervivencia por cáncer cervicouterino en pacientes beneficiarias del Seguro Popular en San Luis Potosí, México, en el periodo 2005-2012. Se utilizaron las curvas de Kaplan-Meier, la prueba Log Rank y la regresión de Cox. Presentaron mayor supervivencia las mujeres que no consumen anticonceptivos hormonales, que laboran en casa y con estadio de cáncer cervicouterino I comparado con el IV (p < 0.05). Con respecto al riesgo de morir por cáncer cervicouterino, las mujeres que usan anticonceptivos hormonales tienen 1.58 veces más el riesgo que las que no los usan; de igual manera, las del estadio IV tienen 15.18 veces más riesgo que las de estadio I; las que trabajan fuera del hogar tienen 50.24 veces más riesgo que las que laboran dentro; aquellas que presentaron recurrencia de la enfermedad tienen 50.24 veces más riesgo comparadas con las que no la tuvieron; y las solteras tienen 1.59 veces más riesgo con respecto a las no solteras. Todas estas diferencias de riesgo fueron significativas (p < 0.05). El uso de anticonceptivos, el estadio del cáncer, la ocupación, la recurrencia de la enfermedad y el estado civil se identificaron como factores de riesgo para la mortalidad por cáncer cervicouterino.
Composición factorial del Inventario de Burnout de Maslach para Estudiantes en universitarios mexicanos
Authors: Blanco Ornelas José René , Ornelas Contreras Martha , Jurado García Perla Jannet , Blanco Vega Humberto , Peinado Pérez Jesús Enrique
Published: October 2020

El presente estudio pretende indagar si se replican los resultados psicométricos propuestos por Schaufeli y colaboradores del Inventario de Burnout de Maslach para Estudiantes (MBI-SS, por sus siglas en inglés). La muestra total fue de 1222 estudiantes de las licenciaturas de Educación Física y Motricidad Humana que se ofrecen en la Universidad Autónoma de Chihuahua, México, con una edad media de 20.67 años (DE = 1.91). La muestra fue aleatoriamente dividida en dos partes con el fin de realizar estudios paralelos que permitieran corroborar y verificar los resultados obtenidos. La estructura factorial del inventario se analizó a través de análisis factoriales confirmatorios. Los análisis muestran que una estructura de tres factores es viable y adecuada. Los tres factores (agotamiento, cinismo y eficacia), atendiendo a criterios estadísticos y sustantivos, han mostrado adecuados indicadores de ajuste de fiabilidad y validez. Además, los resultados de los análisis factoriales llevados a cabo con las submuestras indican la existencia de fuertes evidencias de la estabilidad de la estructura factorial.