Pre-processing ensembles with response oriented sequential alternation calibration (PROSAC): A step towards ending the pre-processing search and optimization quest for near-infrared spectral modelling

In this work, highly conductive Al-doped ZnO (AZO) films are deposited on transparent and flexible muscovite mica substrates by using the atomic layer deposition (ALD) technique. AZO-mica structures possess high optical transmittance at visible and near-infrared spectral range and retain low electric resistivity, even after continuous bending of up to 800 cycles. Structure performances after bending tests have been supported by atomic force microscopy (AFM) analysis. Based on performed optical and electrical characterizations AZO films on mica are implemented as transparent conductive electrodes in flexible polymer dispersed liquid crystal (PDLC) devices. The measured electro-optical characteristics and response time of the proposed devices reveal the higher potential of AZO-mica for future ITO-free flexible optoelectronic applications.

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Phenotypic and genetic variation of ultraviolet–visible-infrared spectral wavelengths of bovine meat

Scientific Reports ◽

10.1038/s41598-021-93457-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Giovanni Bittante ◽

Simone Savoia ◽

Alessio Cecchinato ◽

Sara Pegolo ◽

Andrea Albera

Keyword(s):

Meat Quality ◽

Genetic Improvement ◽

Near Infrared ◽

Infrared Region ◽

Phenotypic Variance ◽

Quality Traits ◽

Meat Quality Traits ◽

Infrared Spectral ◽

Portable Spectrometers ◽

Absorbance Spectra

AbstractSpectroscopic predictions can be used for the genetic improvement of meat quality traits in cattle. No information is however available on the genetics of meat absorbance spectra. This research investigated the phenotypic variation and the heritability of meat absorbance spectra at individual wavelengths in the ultraviolet–visible and near-infrared region (UV–Vis-NIR) obtained with portable spectrometers. Five spectra per instrument were taken on the ribeye surface of 1185 Piemontese young bulls from 93 farms (13,182 Herd-Book pedigree relatives). Linear animal model analyses of 1481 single-wavelengths from UV–Vis-NIRS and 125 from Micro-NIRS were carried out separately. In the overlapping regions, the proportions of phenotypic variance explained by batch/date of slaughter (14 ± 6% and 17 ± 7%,), rearing farm (6 ± 2% and 5 ± 3%), and the residual variances (72 ± 10% and 72 ± 5%) were similar for the UV–Vis-NIRS and Micro-NIRS, but additive genetics (7 ± 2% and 4 ± 2%) and heritability (8.3 ± 2.3% vs 5.1 ± 0.6%) were greater with the Micro-NIRS. Heritability was much greater for the visible fraction (25.2 ± 11.4%), especially the violet, blue and green colors, than for the NIR fraction (5.0 ± 8.0%). These results allow a better understanding of the possibility of using the absorbance of visible and infrared wavelengths correlated with meat quality traits for the genetic improvement in beef cattle.

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Comparison of Techniques for Prediction of Mechanical Strength of Firefighters’ Protective Clothing Using Near-Infrared Spectral Data

Fire Technology ◽

10.1007/s10694-021-01161-7 ◽

2021 ◽

Author(s):

Henry U. Ohalele ◽

Mackenzie Fulton ◽

David A. Torvi ◽

Scott D. Noble ◽

Jane C. Batcheller

Keyword(s):

Mechanical Strength ◽

Spectral Data ◽

Protective Clothing ◽

Near Infrared ◽

Infrared Spectral ◽

Comparison Of Techniques

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Parametric handheld optical probe (HOPE) for biological tissue characterization in the near-infrared spectral range

Optics Communications ◽

10.1016/j.optcom.2021.127076 ◽

2021 ◽

pp. 127076

Author(s):

Daniel Davidov ◽

David Shemesh ◽

Ofira Einstein ◽

David Abookasis

Keyword(s):

Spectral Range ◽

Biological Tissue ◽

Tissue Characterization ◽

Near Infrared ◽

Optical Probe ◽

Infrared Spectral Range ◽

Infrared Spectral

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Biomechanical, biochemical, and near infrared spectral data of bovine knee ligaments and patellar tendon

Data in Brief ◽

10.1016/j.dib.2021.106976 ◽

2021 ◽

Vol 36 ◽

pp. 106976

Author(s):

Aapo Ristaniemi ◽

Jari Torniainen ◽

Tommi Paakkonen ◽

Lauri Stenroth ◽

Mikko A.J. Finnilä ◽

...

Keyword(s):

Spectral Data ◽

Patellar Tendon ◽

Near Infrared ◽

Knee Ligaments ◽

Infrared Spectral

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Integrated Optical Phased Arrays for Beam Forming and Steering

Applied Sciences ◽

10.3390/app11094017 ◽

2021 ◽

Vol 11 (9) ◽

pp. 4017

Author(s):

Yongjun Guo ◽

Yuhao Guo ◽

Chunshu Li ◽

Hao Zhang ◽

Xiaoyan Zhou ◽

...

Keyword(s):

Near Infrared ◽

Phased Arrays ◽

Mechanical Stability ◽

Building Blocks ◽

High Yield ◽

Beam Forming ◽

Integrated Optical ◽

Optical Phased Arrays ◽

Infrared Spectral ◽

Spectral Ranges

Integrated optical phased arrays can be used for beam shaping and steering with a small footprint, lightweight, high mechanical stability, low price, and high-yield, benefiting from the mature CMOS-compatible fabrication. This paper reviews the development of integrated optical phased arrays in recent years. The principles, building blocks, and configurations of integrated optical phased arrays for beam forming and steering are presented. Various material platforms can be used to build integrated optical phased arrays, e.g., silicon photonics platforms, III/V platforms, and III–V/silicon hybrid platforms. Integrated optical phased arrays can be implemented in the visible, near-infrared, and mid-infrared spectral ranges. The main performance parameters, such as field of view, beamwidth, sidelobe suppression, modulation speed, power consumption, scalability, and so on, are discussed in detail. Some of the typical applications of integrated optical phased arrays, such as free-space communication, light detection and ranging, imaging, and biological sensing, are shown, with future perspectives provided at the end.

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