scholarly journals Are Sunglasses Proper for Driving? Investigation and Prototype for Public Testing

2020 ◽  
Author(s):  
Artur Duarte Loureiro ◽  
Liliane Ventura
Keyword(s):  
Light Illumination ◽  
Traffic Light ◽  
Limits Of Agreement ◽  
Safe Driving ◽  
Photo Sensor ◽  
Driving Conditions ◽  
Set Up ◽  
Q Factors ◽  
Sensor Detection ◽  
White Light Illumination

Abstract Background: Sunglasses safety is important regarding driving conditions and is requirement of sunglasses standard ISO 12312-1, for testing traffic light and visible transmittances on lenses. Methods: We have spectroscopically investigated 232 sunglasses regarding compliance with standard, in the 380 nm – 780 nm range, with 5nm steps. Category (0 – 4) were determined as well as Q factors, which evaluate color distortion for the vision on sunglasses. Furthermore, we developed a prototype for public to self-check sunglasses regarding safety for driving. Combination of white light illumination, 4-channels photo sensor detection and calculation, allows testing simultaneously the colors of traffic light, as well as the visible light transmittances (categories). Q factors are provided by the prototype. Results: Spectroscopy shows that 75.43% complies with ISO 12312-1:2013. Prototype was validated by testing 232 sunglasses, with trained user and 60 from this set were double-checked with non-trained users, and compared to spectroscopic measurements. Bland-Altman analysis presented non-significant biases and narrow 95 % limits of agreement within pre-defined tolerances, for all measurements. Only 2 samples differed in category measurement. Conclusions: Sunglasses on the market should adjust for driving conditions. Prototype it is a fine set up for guiding users on checking proper sunglasses for safe driving Significance: Immediate attention on checking sunglasses for driving conditions is needed.

Effect of Illumination on Organic Polymer Thin-Film Transistors

2003 ◽  
Vol 771 ◽  
Author(s):  
Michael C. Hamilton ◽  
Sandrine Martin ◽  
Jerzy Kanicki
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Drain Current ◽  
Charge Carriers ◽  
Electrical Performance ◽  
Organic Polymer ◽  
Light Illumination ◽  
Polymer Thin Film ◽  
Channel Region ◽  
White Light Illumination

AbstractWe have investigated the effects of white-light illumination on the electrical performance of organic polymer thin-film transistors (OP-TFTs). The OFF-state drain current is significantly increased, while the drain current in the strong accumulation regime is relatively unaffected. At the same time, the threshold voltage is decreased and the subthreshold slope is increased, while the field-effect mobility of the charge carriers is not affected. The observed effects are explained in terms of the photogeneration of free charge carriers in the channel region due to the absorbed photons.

Full field of view super-resolution imaging based on two static gratings and white light illumination

2008 ◽  
Vol 47 (17) ◽  
pp. 3080 ◽  
Author(s):  
Javier García ◽  
Vicente Micó ◽  
Dan Cojoc ◽  
Zeev Zalevsky
Keyword(s):  
White Light ◽  
Super Resolution ◽  
Field Of View ◽  
Light Illumination ◽  
Full Field ◽  
Resolution Imaging ◽  
White Light Illumination

New Interferometric Methods for Group-Delay Measurement Using White-Light Illumination

1996 ◽  
pp. 607-611
Author(s):  
A. P. Kovács ◽  
G. Kurdi ◽  
K. Osvay ◽  
R. Szipöcs ◽  
J. Hebling ◽  
...  
Keyword(s):  
White Light ◽  
Group Delay ◽  
Light Illumination ◽  
Delay Measurement ◽  
White Light Illumination

scholarly journals Performance Analysis of V2V and V2I LiFi Communication Systems in Traffic Lights

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Gerardo Hernandez-Oregon ◽  
Mario E. Rivero-Angeles ◽  
Juan C. Chimal-Eguía ◽  
Arturo Campos-Fentanes ◽  
Jorge G. Jimenez-Gallardo ◽  
...  
Keyword(s):  
Mobile Communications ◽  
Communication Systems ◽  
Vehicular Networks ◽  
Low Cost ◽  
Red Light ◽  
Green Light ◽  
Mathematical Expression ◽  
Traffic Light ◽  
Safe Driving ◽  
Traffic Lights

Vehicular networks is a key technology for efficiently communicating both user’s devices and cars for timely information regarding safe driving conditions and entertaining applications like social media, video streaming, and gaming services, among others. In view of this, mobile communications making use of cellular resources may not be an efficient and cost-effective alternative. In this context, the implementation of light-fidelity (LiFi) in vehicular communications could be a low-cost, high-data-rate, and efficient-bandwidth usage solution. In this work, we propose a mathematical analysis to study the average throughput in a road intersection equipped with a traffic light that operates as a server, which is assumed to have LiFi communication links with the front lights of the vehicles waiting for the green light. We further assume that the front vehicle (the car next to the traffic light) is able to communicate to the car immediately behind it by using its own tail lights and the front lights of such vehicle, and so on and so forth. The behavior of the road junction is modeled by a Markov chain, applying the Queueing theory with an M/M/1 system in order to obtain the average queue length. Then, Little’s theorem is applied to calculate the average waiting delay when the red light is present in the traffic light. Finally, the mathematical expression of the data throughput is derived.

scholarly journals Graphene Channels Interfaced with Quantum Dots in Field Effect Transistors: Electrical and Photo-Induced Effects

MRS Advances ◽  
2016 ◽  
Vol 1 (22) ◽  
pp. 1597-1603
Author(s):  
Xin Miao ◽  
Samarth Trivedi ◽  
Haim Grebel
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Chemical Vapor ◽  
Hole Array ◽  
Light Illumination ◽  
Anodized Aluminum ◽  
Transistor Channel ◽  
Anodized Aluminum Oxide ◽  
Hexagonal Hole ◽  
White Light Illumination

ABSTRACTGraphene-based field effect transistors (GFETs) were assessed when interfaced with well separated and precisely placed core/shell CdSe/ZnS semiconductor quantum dot (QD) arrays. The QDs were imbedded in a hexagonal hole-array, which was formed in a layer of anodized aluminum oxide on Si/SiO2substrates. Graphene (single, or two layers), grown by chemical vapor deposition (CVD) on Cu foils, was transferred and placed on top of the QDs imbedded films and served as the transistor channel. Electrical characteristics under white-light illumination at various biasing conditions revealed that the photo current was decreasing upon increasing biasing. The device's photoluminescence (PL) as a function of both the drain-source and gate-source potentials also reduced as a function of the potential biases. We observed two maxima in the PL data while tilting the sample with respect to the incident laser beam. We attributed it to the optimal coupling between the incident and the emission wavelengths to resonating surface modes.

The photocatalytic phenol degradation mechanism of Ag-modified ZnO nanorods

2020 ◽  
Vol 8 (9) ◽  
pp. 3000-3009 ◽  
Author(s):  
Chang Feng ◽  
Zhuoyuan Chen ◽  
Jiangping Jing ◽  
Jian Hou
Keyword(s):  
White Light ◽  
Degradation Mechanism ◽  
Zno Nanorods ◽  
Phenol Degradation ◽  
Light Illumination ◽  
White Light Illumination

ZnO/Ag/Ag2O accelerates phenol degradation through different intermediate processes under white light illumination.

Facile one-pot synthesis of long-term thermally stable CDs@AlOOH toward white-light illumination

2019 ◽  
Vol 7 (46) ◽  
pp. 14717-14724 ◽  
Author(s):  
Jiaming Wu ◽  
Shuxian Wang ◽  
Shuxin Liu ◽  
Shuwei Ma ◽  
Guojian Jing ◽  
...  
Keyword(s):  
Thermal Stability ◽  
White Light ◽  
Low Cost ◽  
Fluorescence Emission ◽  
Light Illumination ◽  
One Pot ◽  
One Pot Synthesis ◽  
One Step ◽  
White Light Illumination

The CDs doped boehmite composite (CDs@AlOOH) is directly achieved through a facile, low-cost and green one-step decomposition route with tunable fluorescence emission and long-term thermal stability.

scholarly journals Quantitative Phase and Intensity Microscopy Using Snapshot White Light Wavefront Sensing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Congli Wang ◽  
Qiang Fu ◽  
Xiong Dun ◽  
Wolfgang Heidrich
Keyword(s):  
White Light ◽  
Quantitative Methods ◽  
Imaging Techniques ◽  
Low Cost ◽  
Quantitative Imaging ◽  
Light Illumination ◽  
Phase Imaging ◽  
Invaluable Tool ◽  
Qualitative Phase ◽  
White Light Illumination

Abstract Phase imaging techniques are an invaluable tool in microscopy for quickly examining thin transparent specimens. Existing methods are limited to either simple and inexpensive methods that produce only qualitative phase information (e.g. phase contrast microscopy, DIC), or significantly more elaborate and expensive quantitative methods. Here we demonstrate a low-cost, easy to implement microscopy setup for quantitative imaging of phase and bright field amplitude using collimated white light illumination.

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