Journal of the Optical Society of America and Review of Scientific Instruments最新文献

Reservoir computing-based digital signal equalizer for equivalent-time sampling. 基于油藏计算的等效时间采样数字信号均衡器。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2023-11-01 DOI: 10.2139/ssrn.4345359

Ning Jing, Junpeng Zhao, Minjuan Zhang

引用次数: 0

Enhancement of a pyroelectric body energy harvesting scheme employing pulsed electric fields. 利用脉冲电场的热释电体能量收集方案的改进。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2023-07-01 DOI: 10.2139/ssrn.4340934

Buddhika Amila Kumara Sodige, Hideto Furuno, Nguyen Chi Trung Ngo, Hironari Sugiyama, Masaaki Baba, K. Niihara, T. Nakayama

{"title":"Enhancement of a pyroelectric body energy harvesting scheme employing pulsed electric fields.","authors":"Buddhika Amila Kumara Sodige, Hideto Furuno, Nguyen Chi Trung Ngo, Hironari Sugiyama, Masaaki Baba, K. Niihara, T. Nakayama","doi":"10.2139/ssrn.4340934","DOIUrl":"https://doi.org/10.2139/ssrn.4340934","url":null,"abstract":"This research utilizes waste heat energy as a sustainable energy source to enhance pyroelectric power output by combining pyroelectric nanogenerators with an external pulsed electric field. When the surface temperature of the pyroelectric body varies, applying different pulses of the external electric field results in maximum power accumulation. A novel power-generating experimental setup was developed to measure and compute pyroelectric power generation. A standard Fuji ceramic C-9 sample was used to generate pyroelectric energy in a 20 °C temperature range from 120 to 140 °C. The continuous temperature variation frequency was 0.05 Hz, and the pulsed electric field was applied when the temperature rose. Pulses of the electric field with widths of 10, 50, 100, and 200 ms were applied to the sample under different pulse amplitudes, and the amplitude of each pulse was 250, 500, 1000, or 1500 V/mm. The maximum power generated through the application of an external pulsed electric field under the above-mentioned conditions was evaluated. This system had the highest power density of 0.204 mJ cm-2 °C-1 kV-1. In addition, for the lowest input power, the maximum power generation condition was a 10 ms pulse width and an amplitude of 250 V mm-1 in the applied electric field. This state might power smart sensor modules, IoT devices, automobiles, and other waste heat energy applications. Nano-pulse electric field applications may reduce input power to its lowest level, dependent on net-producing power. Therefore, new researchers can use net-generation power efficiency to create a large-scale power source using multiple pyroelectric arrays.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80184194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Identifying stakeholder priorities in use of wearable cameras for researching parent-child interactions. 确定利益相关者在使用可穿戴相机研究亲子互动方面的优先事项。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2023-06-23 DOI: 10.3389/frcha.2023.1111299

Andy Skinner, Ilaria Costantini, Chris Stone, James Darios, Mike Gray, Iryna Culpin, Rebecca M Pearson

{"title":"Identifying stakeholder priorities in use of wearable cameras for researching parent-child interactions.","authors":"Andy Skinner, Ilaria Costantini, Chris Stone, James Darios, Mike Gray, Iryna Culpin, Rebecca M Pearson","doi":"10.3389/frcha.2023.1111299","DOIUrl":"10.3389/frcha.2023.1111299","url":null,"abstract":"Wearable Cameras (WCs) enable researchers to capture objective descriptions of what participants see and experience as they go about their normal lives. When studying interactions between individuals (e.g. between a parent and child), using multiple WCs can provide highly detailed descriptions of interactions with levels of ecological validity not possible with other methods. However, the use of WCs brings challenges too, and understanding these is key to developing and optimising these methods. We captured the challenges experienced by a variety of stakeholders, namely parents and a range of different researcher roles (academics, field-workers and data processors) involved in a large UK study exploring parent-child interactions using low-cost, off-the-shelf WCs. High among the challenges identified were difficulties caused when subjects are temporarily not in view in the video footage captured. This and other factors identified were used as criteria to select a new, improved WC. The new WCs reduced the time faces were not in view by 75%. We report this and the other challenges identified, and suggest how these can be used to guide and help optimise future studies of this kind.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7616607/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89073457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving pose estimation accuracy for large hole shaft structure assembly based on super-resolution. 基于超分辨率提高大孔轴结构装配位姿估计精度。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2023-06-01 DOI: 10.2139/ssrn.4333769

Kuai Zhou, Xiang Huang, Shuanggao Li, Gen Li

引用次数: 0

Spectrum on demand light source (SOLS) for advanced photovoltaic characterization. 光谱随需光源(SOLS)用于先进的光伏表征。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-12-22 DOI: 10.29363/nanoge.matsus.2023.341

Miquel Casademont-Viñas, Martí Gibert-Roca, M. Campoy‐Quiles, A. Goñi

{"title":"Spectrum on demand light source (SOLS) for advanced photovoltaic characterization.","authors":"Miquel Casademont-Viñas, Martí Gibert-Roca, M. Campoy‐Quiles, A. Goñi","doi":"10.29363/nanoge.matsus.2023.341","DOIUrl":"https://doi.org/10.29363/nanoge.matsus.2023.341","url":null,"abstract":"We report a multi-purpose spectrum-on-demand light source (SOLS), conceived primarily but not exclusively for the multiple and advanced characterization of photovoltaic (PV) materials and devices. The apparatus is a spectral shaper illumination device, providing a tunable and spectrally shaped light beam produced by modulating the intensity and/or wavelength range of a primary light source. SOLS stands out from the state of the art because it produces almost any spectrum on demand and delivers two types of output: a spectrally shaped and spatially homogeneous beam over its cross section for areal illumination or a spatially and spectrally split beam into its wavelength components, a unique capability suited to characterize lateral-tandem (Rainbow) solar cells. The tuneability from broadband to narrowband illumination enables two characterization devices into one, namely, a solar simulator for the determination of the power conversion efficiency and an external quantum efficiency measuring system. We expect the SOLS setup to accelerate material screening, enabling the discovery and optimization of novel multi-component materials and devices, in particular for emergent PV technologies like organic, metal halide perovskites, or multi-junction geometries, as well as novel PV applications such as indoors, building integrated, or agrivoltaics, among others.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84631378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hallucinations in the Child and Adolescent "Ultra-High Risk" population: A Systematic Review. 儿童和青少年 "超高危 "人群中的幻觉：系统回顾。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-11-04 eCollection Date: 2022-01-01 DOI: 10.1093/schizbullopen/sgac068

Michelangelo Di Luzio, Maria Pontillo, Cristina Di Vincenzo, Domenica Bellantoni, Francesco Demaria, Stefano Vicari

{"title":"Hallucinations in the Child and Adolescent \"Ultra-High Risk\" population: A Systematic Review.","authors":"Michelangelo Di Luzio, Maria Pontillo, Cristina Di Vincenzo, Domenica Bellantoni, Francesco Demaria, Stefano Vicari","doi":"10.1093/schizbullopen/sgac068","DOIUrl":"10.1093/schizbullopen/sgac068","url":null,"abstract":"Background and hypothesis: \"Ultra-high risk\" for psychosis young adults are assumed to be at higher risk of developing a psychotic spectrum disorder. Predominantly, the ultrahigh-risk population is aged 18-35 years, but it may also include younger children and adolescents. Individuals in this population experience psychosis prodromes in the form of attenuated or brief psychotic symptoms (particularly perceptual abnormalities). Albeit diagnosis is made via structured interviews, such measures fail to sufficiently assess the precise form and content of perceptual abnormalities, especially as they manifest in children and adolescents.Study design: The present study involved a systematic review of the literature on perceptual abnormalities (particularly hallucinations) in ultrahigh-risk children and adolescents.Results: The analysis reviewed five studies and drew conclusions about the perceptual abnormalities (ie, hallucinations) experienced by the study samples, focusing on form, content, and associations with other symptoms. Of note, 2 of the investigated studies suggested a relationship between hallucinations and experiences of childhood trauma.Conclusions: The transition to psychosis and experiences of childhood trauma could correspond to different types of hallucinations in ultrahigh-risk children and adolescents. This knowledge could improve the identification of prodromal states in the young, ultrahigh-risk population.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"63 1","pages":"sgac068"},"PeriodicalIF":0.0,"publicationDate":"2022-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11205958/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89122302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on a step delay method in sequential equivalent time sampling (ETS). 序列等效时间采样(ETS)中阶跃延迟方法的研究。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-11-01 DOI: 10.2139/ssrn.4060795

Haitao Li, Binkang Li, Zongjing Lv, Yanli Chen

{"title":"Research on a step delay method in sequential equivalent time sampling (ETS).","authors":"Haitao Li, Binkang Li, Zongjing Lv, Yanli Chen","doi":"10.2139/ssrn.4060795","DOIUrl":"https://doi.org/10.2139/ssrn.4060795","url":null,"abstract":"Sequential equivalent time sampling (ETS) has been extensively used in data acquisition instruments (e.g., sampling oscilloscopes and time domain reflectometers). A novel step delay method is proposed based on the frequency difference to obtain a higher sampling rate in sequential ETS. It is different from the classic step delay methods and is capable of increasing the sampling rate. The sampling clock and the repetitive signal are taken as examples in this study. The time-frequency conversion relationship indicates that a fine step delay will be generated in the time domain if there is a frequency difference between the two in the frequency domain. The core of the proposed method is the selection of the appropriate frequency difference (step delay) according to the desired equivalent sampling rate. Two experiments were performed to verify the proposed method. The feasibility of the proposed method is verified using a digital storage oscilloscope. Four cases are examined in the experiment, and the final equivalent sampling rate is obtained as 5 PS/s for the equivalent sampling of a 4.999 995 GHz (or higher) signal. A data acquisition system with a 10 MS/s real-time sampling rate is designed to verify the feasibility of the proposed method, obtaining a theoretical equivalent sampling rate of 585 GS/s. The theoretical equivalent sampling rate and the examined equivalent sampling rate are consistent. The equivalent sampling waveform and real-time sampling waveform of a 1 GHz signal are compared, and the comparison result suggests that the proposed method can acquire more waveform information. The proposed method obtains a high equivalent sampling rate for repetitive signals, and techniques (e.g., oversampling) are given to obtain higher vertical resolution. The proposed method, combined with a sample-and-hold amplifier, can also achieve a higher analog bandwidth.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"31 1","pages":"114708"},"PeriodicalIF":0.0,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74102795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Learning A Simulation-based Visual Policy for Real-world Peg In Unseen Holes 学习一种基于仿真的视觉策略，用于现实世界中看不见的洞

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-09 DOI: 10.48550/arXiv.2205.04297

Liangru Xie, Hongxiang Yu, Kechun Xu, Tong Yang, Minhang Wang, Haojian Lu, R. Xiong, Yue Wang

{"title":"Learning A Simulation-based Visual Policy for Real-world Peg In Unseen Holes","authors":"Liangru Xie, Hongxiang Yu, Kechun Xu, Tong Yang, Minhang Wang, Haojian Lu, R. Xiong, Yue Wang","doi":"10.48550/arXiv.2205.04297","DOIUrl":"https://doi.org/10.48550/arXiv.2205.04297","url":null,"abstract":"This paper proposes a learning-based visual peg-in-hole that enables training with several shapes in simulation and adapting to arbitrary unseen shapes in the real world with minimal sim-to-real cost. The core idea is to decouple the generalization of the sensory-motor policy from the design of a fast-adaptable perception module and a simulated generic policy module. The framework consists of a segmentation network (SN), a virtual sensor network (VSN), and a controller network (CN). Concretely, the VSN is trained to measure the pose of the unseen shape from a segmented image. After that, given the shape-agnostic pose measurement, the CN is trained to achieve a generic peg-in-hole. Finally, when applying to real unseen holes, we only have to fine-tune the SN required by the simulated VSN + CN. To further minimize the transfer cost, we propose to automatically collect and annotate the data for the SN after one-minute human teaching. Simulated and real-world results are presented under the configuration of eye-to/in-hand. An electric vehicle charging system with the proposed policy inside achieves a 10/10 success rate in 2-3 s, using only hundreds of auto-labeled samples for the SN transfer.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"150 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75764150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-scale and high-depth three dimensional scanning measurement system and algorithm optimization. 大规模高深度三维扫描测量系统及算法优化。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0085229

Fan Zhang, ZhenYang Li, Liansheng Zhang, R. Cheng, Qiangxian Huang, Ruijun Li, Chao-qun Wang

{"title":"Large-scale and high-depth three dimensional scanning measurement system and algorithm optimization.","authors":"Fan Zhang, ZhenYang Li, Liansheng Zhang, R. Cheng, Qiangxian Huang, Ruijun Li, Chao-qun Wang","doi":"10.1063/5.0085229","DOIUrl":"https://doi.org/10.1063/5.0085229","url":null,"abstract":"Tapping scanning mode is an important method for measuring surface topography at the nanometer scale. It is widely used because it can eliminate lateral force and reduce damage to the tested sample. Research on three dimensional (3D) scanning technology with a large range and high depth-to-width ratio has important practical significance and engineering application value because the current scanning probe microscope has the limitations of small measurement ranges and weak Z-direction measurement ability. The high-frequency resonance of the quartz tuning fork, combined with the tungsten stylus, is used in this paper. It has the ability to measure the surface profile of the microdevice with a large aspect ratio. The proposed 3D scanning measurement system has realized a microstructure measurement with a depth of ∼58 µm. The entire measuring range is 400 × 400 × 400 µm3, and the vertical resolution reaches 0.28 nm. The system can accurately obtain the 3D surface topography of the microfluidic biochip. In addition, a sliding window algorithm (SWA) based on errors in the scanning process and low scanning efficiency is proposed. Compared with the point-by-line scanning algorithm, the proposed SWA reduces the mean value of the squared residuals of the 3D profile by 7.70%, thereby verifying the feasibility of the algorithm. The 3D scanning measurement system and the algorithm in the tap mode provide an important reference for the 3D topography measurement of microstructures with large aspect ratios.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"19 1","pages":"053705"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82112500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tellurium spectrometer for 1S0-1P1 transitions in strontium and other alkaline-earth atoms. 用于锶和其他碱土原子中s1 - 1p1跃迁的碲谱仪。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0084122

T. G. Akin, Bryan Hemingway, Steven Eric Peil

引用次数: 0