Research on Improving the Accuracy of Wearable Heart Rate Measurement Based on a Six-Axis Sensing Device Integrating a Three-Axis Accelerometer and a Three-Axis Gyroscope by Jinman Kim, Joongjin Kook

“…This approach offers a significant advantage by utilizing inertial sensors commonly embedded in wearable devices for heart rate monitoring without the need for additional optical sensors. Compared to optical-based systems, the proposed method is more power-efficient and less affected by environmental factors such as ambient lighting conditions. …”
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SELECTION OF LINEAR AND ELLIPTICAL OBJECTS IN THE IMAGE BASED ON THE CALCULATION OF THE CORRELATION COEFFICIENT by V. V. Bulatov

“…Recently, this area has paid a lot of attention, since correct recognition of objects in an image is relevant for different areas: robotics, optical inspection of defects in materials and products, analysis of aerospace images, etc. …”
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Determination of bacterial contamination of milk using fluorometry by Baghdad Science Journal

“…The aim of this paper is to determine the feasibility of using fluorometric methods as an indicator for quality and contamination of milk with E.coli bacteria, and selection the suitable wavelength to be used with laser induced auto fluorescence. …”
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Wavelength dependence of linear birefringence and linear dichroism of Bi2− x Pb x Sr2CaCu2O8+ δ single crystals by Keigo Tokita, Kenta Nakagawa, Kun Zhang, Komei Okano, Masataka Matsumoto, Takuya Nakanishi, Masaki Fujita, Toru Asahi

“…To investigate the origin of the significant optical anisotropy, single crystals of Bi2− x Pb x Sr2CaCu2O8+ δ with different lead contents (x = 0, 0.4, and 0.6) were grown using the floating zone method, and the wavelength dependencies of linear birefringence and linear dichroism along the c axis were measured. …”
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Measurements and Characterization for Millimeter-Wave Massive MIMO Channel in High-Speed Railway Station Environment at 28 GHz by Shuangde Li, Yuanjian Liu, Leke Lin, Qi Sun

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Angular Color Uniformity Enhancement for Color-Mixed LEDs by Introducing a Diffusing Coating Layer by Xin Zhu, Guangxu Wang, Xin Luo, Jianli Zhang, Junlin Liu, Xing Guo

“…The diffuse coating layer was fabricated by spraying method. Its optical performance was demonstrated by experiments. …”
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Review on Rail Damage Detection Technologies for High-Speed Trains by Yu Wang, Bingrong Miao, Ying Zhang, Zhong Huang, Songyuan Xu

“…The most important optical detection method is machine vision detection. …”
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Detection of smoke from infrared image frames in the aircraft cargoes by Li Deng, Qian Chen, Yuanhua He, Xiubao Sui, Qin Wang

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A portable system to measure knee extensor spasticity after spinal cord injury by Dalia De Santis, Monica A. Perez

“…Methods Spasticity was quantified by measuring the first swing angle (FSA) using a 3-dimensional optical tracking system (with external markers over the iliotibial band, lateral knee epicondyle, and lateral malleolus) and two wireless IMUs (positioned over the iliotibial band and mid-part of the lower leg) as well as a clinical exam (Modified Ashworth Scale, MAS). …”
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Dynamics of Dispersive Wave Emission From Dark Solitons in Kerr Frequency Combs by Yang He, Shaofei Wang, Xianglong Zeng

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The Tip of Red Giant Branch Distances to Nearby Dwarf Galaxies WLM and Sextans A with JWST by Ziming Yan, Shu Wang, Xiaodian Chen, Licai Deng

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Using Quantitative Characteristics of Document Images for Identification of Laser Printers by S. M. Petrov

“…The article provides a brief overview of the current state of the theory and practice of identifying laser printers and the results of research work aimed at discovering individual features of the printing mechanism of a laser printer.The author analyses the scheme of a laser printer, describes the printing cycle, presents the main results of the analysis of a printer’s mechanism and the influence of its individual parts on the optical density of printing. The method of assessment of the optical density of the print by the digital image of the printed document is proposed, the complex of the necessary technical and program tools is described.A hypothesis on the correlation between fluctuations in the optical density of printing of solid fills and fluctuations in the area of printed elements was put forward and confirmed; a visual representation of the study results in graphical form is presented, the relationship between the shape of the obtained graphs and defects of the printer’s components and parts is substantiated. …”
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Iterative Forward-Backward Pursuit Algorithm for Compressed Sensing by Feng Wang, Jianping Zhang, Guiling Sun, Tianyu Geng

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OTDR Development Based on Single-Mode Fiber Fault Detection by Hui Liu, Tong Zhao, Mingjiang Zhang

“…Next, a comprehensive review of improved OTDR technologies and systems is provided, categorizing different performance enhancement methods, including the enhanced measurement distance with simple structure and low cost in 2024, and the high spatial resolution measurement of optical fiber reflection events and non-reflection events in 2025. …”
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A Monocular Variable Magnifications 3D Laparoscope System Using Double Liquid Lenses by Fan Mao, Tianqi Huang, Longfei Ma, Xinran Zhang, Hongen Liao

“…Our system composes of an optical structure that can obtain auto magnification change and autofocus without any physically moving element, and a deep learning network based on the Depth from Defocus (DFD) method, trained to suit inconsistent camera intrinsic situations and estimate depth from images of different focal lengths. …”
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Unsupervised Domain Adaptation for SAR Ship Detection Based on Multitask Decoupling by Yirong Yang, Xi Yang, Dong Yang

“…Facing the challenge, we propose an unsupervised domain adaptation method for SAR ship detection based on multitask decoupling, which leverages data annotated with optical images instead of SAR annotations. …”
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Experimental Study on the Photothermal Properties of Thermochromic Glass by Mingyi Gao, Dewei Qian, Lihua Zhao, Rong Jin

“…The method uses a spectrophotometer and a PID heater to achieve the dynamic optical parameter testing of TCGs at different temperatures. …”
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Singularity transformation through single-pass phase modulation of light by Laxminarayan, Srinivasa Rao Allam, Takashige Omatsu, Praveen Kumar

“…Abstract The emergence of optical vortex phenomena has generated significant interest in optical technologies. …”
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A universal high-resolution micro-patterning technique for solution-processed materials by John Leo Velpugonda, Naresh Varnakavi, Matthew Yerich, Lih Y Lin

“…Many of the methods reported so far, including specially engineered photoresist or ink-jet printing, are either of poor yield, resolution limited, difficult to scale for mass production, overly expensive, or sacrificing some optical quality of the quantum dots. …”
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STRUCTURAL DYNAMICS OF FREE MOLECULES AND CONDENSED MATTER. Part I. THEORY AND EXPERIMENTAL TECHNIQUE by A. A. Ischenko, Y. I. Tarasov, L. Schäfer

“…The combination of state-of-the-art optical techniques and electron diffraction methods based on different physical phenomena, but complementing each other, opens up new possibilities of the structural studies at time sequences of ultrashort duration. …”
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