Comparative Study on the Interest in Non-Uniform Rational B-Splines Representation versus Polynomial Surface Description in a Freeform Three-Mirror Anastigmat by Clément Freslier, Guillaume Druart, Alice Fontbonne, Thierry Lépine, Christophe Buisset, Tibor Agocs, Arnaud Heliere, Fanny Keller, Jean-Baptiste Volatier, Stéphane Beaussier, Paul Jougla

“…Novel freeform optical design methods can be classified in two categories, depending on whether they focus on the generation of a starting point or the development of new optimization tools. …”
Get full text

Synthesis of Gold Nanorods for Multifaceted Applications by Marina Sidorova, Anton Popov

“…Different length gold nanorods (AuNRs) were synthesized using different methods. …”
Get full text

Design of a Demodulation Algorithm for UWOC based on Improved Manchester Coding by ZHANG You, HU Fangren, ZHAO Xiaoyan, ZHOU Jun, WANG Qilong

“…【Objective】To meet the requirements of the engineering of high-speed Underwater Wireless Optical Communication (UWOC) technology, and to address the issue of high Bit Error Rate (BER) in underwater channels when using modulation methods such as On/Off Keying (OOK) that rely on threshold demodulation for high-speed communication, this paper conducts comparative simulation analysis of commonly used underwater optical communication modulation methods and proposes an improved modulation and demodulation algorithm that combines Pulse Position Modulation (PPM) with Manchester encoding and does not require threshold decision-making.…”
Get full text

Integrating Landsat, Sentinel-2 and Sentinel-1 time series for mapping intermediate crops by Kassandra Jensch, Gohar Ghazaryan, Stefan Ernst, Patrick Hostert, Claas Nendel

“…We trained random forest models using different sets of input features, including spectral-temporal metrics from optical data, metrics derived from SAR data and information on the scheduled main crop. …”
Get full text

Innovative Hard Isolation Techniques in GPON for Modern Power Distribution Networks by Jiangang Lu, Jiajia Fu, Xingnan Li, Yutu Liang

“…Traditional communication methods, which often require separate networks for different services, lead to increased equipment, limited installation space, and higher consumption of optical fiber resources. …”
Get full text

5G NR sub-THz fiber-wireless integrated systems using polarization multiplexing-multiband technique and self-polarization diversity scheme by Ming-Chung Cheng, Hai-Han Lu, Hsiao-Mei Lin, Stotaw Talbachew Hayle, Xu-Hong Huang, Wei-Wen Hsu, Yu-Chen Chung, Yu-Yao Bai, Kelper Okram, Jia-Ming Lu

“…Self-polarization diversity scheme is an efficient scheme for polarization demultiplexing, in which an x-polarized (y-polarized) optical carrier with multiple x-polarized (y-polarized) optical signals can be detected using single-ended photodiodes. …”
Get full text

The fundamentals of synthesis of the nanomaterials, properties, and emphasis on laser ablation in liquids: a brief review by G Krishna Podagatlapalli

“…Different methods follow their own synthesis protocols, time durations, economical feasibility, and reproducibility. …”
Get full text

Study on Packaging Technology of GAGG:Ce Scintillation Detector by WAN Qianyin1, 2, WANG Qiang1, 2, XIE Yuqing1, 2, XIAO Xiong1, 2, ZHANG Zetao1, 2, DING Yuchong1, 2, REN Kejing1, 2, XU Yang1, 2

“…Thirdly, in view of the effect of the refractive index of the optical glue on the photon collection efficiency of the coupling crystal and PMT, the optical output of the detector under the coupling of 6 different refractive index optical glue (1.43-1.70) was compared. …”

Secchi Depth Retrieval in Oligotrophic to Eutrophic Chilean Lakes Using Open Access Satellite-Derived Products by Daniela Rivera-Ruiz, José Luis Arumí, Mario Lillo-Saavedra, Carlos Esse, Patricia Arancibia-Ávila, Roberto Urrutia, Marcelo Portuguez-Maurtua, Igor Ogashawara

“…Nonetheless, this study underscores the need for model-specific calibration of C2RCC-Nets, as lakes with different optical water types and trophic states may require tailored training ranges for inherent optical properties.…”
Get full text

Chaotic behavior, sensitivity analysis and Jacobian elliptic function solution of M-fractional paraxial wave with Kerr law nonlinearity. by Md Mamunur Roshid, Mohammad Safi Ullah, M M Rahman, Harun-Or- Roshid

“…These solutions have applications in wave dynamics in different optical systems and optical fibre. Furthermore, we investigate chaotic phenomena by analyzing the model qualitatively. …”
Get full text

Femtosecond System with Pulse Pumping of Seed Laser and Amplifier by Using a Single Power Unit by S. A. Tikhomirov

“…There is a constant improvement both in the methods of such pulses receiving and in methods of their use. …”
Get full text

Unsupervised Video Anomaly Detection Using Video Vision Transformer and Adversarial Training by Shimpei Kobayashi, Akiyoshi Hizukuri, Ryohei Nakayama

“…Consequently, this study aims to develop an unsupervised anomaly detection method for surveillance videos based on the prediction of future frame and optical flow magnitude using adversarial networks. …”
Get full text

Bacteria Biofilms in Purulent-Septic Infections by E. D. Savilov, E. V. Anganova, O. A. Noskova, A. V. Dukhanina

“…The aim of the work is to study of the frequency of occurrence and the degree of activity of biofilm formation of microorganisms isolated from different locus in purulent-septic infections.Materials and methods. …”
Get full text

The study of antimicrobial activity of povidone-iodine solution under the influence of laser irradiation in vitro by N. O. Zhdanova, E. I. Dolya, O. S. Volkova, Ye. M. Ryabokon

“…The purpose of this work was to evaluate the antimicrobial activity of povidone-iodine solution as a photosensitizer and effective optical range of laser activation identification in vitro. …”
Get full text

Comparison Between the Properties of Three New Designs of Pinhole Magnetic Lens by Jinan A. Aljibory, R.Y. J. AL-Salih

“…Their magnetic and optical properties were studied using Finite Element Method for Calculating Magnetic Field Distribution (FEM-CMFD) and Magnetic Electron Lens Optical Properties (MELOP) software. …”
Get full text

Contrast of Image of an Object Observed in Smoke Conditions using Polarizing Filtering of Radiation Scattered by Smoke Particles by A. I. Kitsak

“…Prospects for developing optical accessories for firefighters to improve the observation of objects in smoke were evaluated by comparing image contrasts.The goal was achieved by experimentally simulating the process of transmitting images of a blackandwhite object with a sharp black/white transition boundary through various types of smoke aerosols using polarizing filtering of radiation scattered by smoke particles, and without filtering and evaluating image contrasts.Studies of image contrasts for different optical densities of smoke in two registration schemes were performed, when the receiving optical system is located near the illumination source of the object at a distance of ≈ 150 mm from it, and when it is located at a distance from the illumination source of the object at a distance of ≈ 800 mm.It is established that the method of forming the image of the object using polarization filtering of radiation backscattering (RBS) reduces the rate of image contrast reduction with an increase in optical smoke density compared to image registration without filtering (RBS).A significant difference in the contrasts of images recorded with filtration (RBS) and in the absence of it is observed for "light" fumes (smoldering of wood, cotton) at average optical densities of smoke.The results obtained can be used in the development of optical accessories for firefighter-rescuer to improve the conditions of observation of objects in adverse conditions of vision: smoke, vaporization, fog.…”
Get full text

Effect of hydrothermal aging on color stability and translucency of two zirconia generations compared to lithium disilicate ceramics by Atef Ahmed Elzoughary, Tamer Abel Rahim Hamza, Mohamed Fawzy Metwally

“…The present investigation compared how hydrothermal aging affected the properties of two types of zirconia and lithium disilicate. Methods. Thirty rectangular samples (12×14×1 mm) were prepared and sectioned from three different ceramic blocks/blanks (n=10), then assigned into three groups according to the ceramic type: group Z: IPS e.max ZirCAD prime, gradient zirconia (3Y/5Y-TZP); group K: Katana UTML (5Y-TZP); and group E: IPS e.max CAD (lithium disilicate). …”
Get full text

Computer-assisted quantitative analysis of Ki-67 antigen in dysplasia: Associated lesions or masses in ulcerative colitis by Živković Vesna, Petrović Aleksandar, Đorđević Biljana, Katić Vuka, Gligorijević Jasmina, Pavlović Voja, Krstić Miljan

“…The overall average values of chromogene nuclear optical density, showed statistically significant differences between DALMs and carcinoma (p < 0.05), although not between normal mucosa and low-grade dysplasia (p > 0.05). …”
Get full text

SPECTROPHOTOMETRIC DETERMINATION OF ATORVASTATINE CALCIUM by O. Yu. Myronova, S. O. Vasjuk

“…Accuracy was established by additives method. Evaluation of robustness was conducted by identifying factors that affect the value of the optical density - namely, the number of added reagents. …”
Get full text

Aquatic respiration rate measurements at low oxygen concentrations. by Moritz Holtappels, Laura Tiano, Tim Kalvelage, Gaute Lavik, Niels Peter Revsbech, Marcel M M Kuypers

“…Recent improvements in oxygen sensing techniques bear great potential to overcome these limitations. Here we compare 3 different methods to measure oxygen consumption rates at low oxygen concentrations, utilizing amperometric Clark type sensors (STOX), optical sensors (optodes), and mass spectrometry in combination with (18-18)O2 labeling. …”
Get full text