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Study on plasma expansion model of primary discharge on spacecraft solar array 航天器太阳电池阵列一次放电等离子体膨胀模型研究
Pub Date : 2024-11-01 DOI: 10.1088/2058-6272/ad718b
Dejie WEI, 德杰 尉, Jianwen WU (武建文), Liying ZHU and 立颖 朱
{"title":"Study on plasma expansion model of primary discharge on spacecraft solar array","authors":"Dejie WEI, 德杰 尉, Jianwen WU (武建文), Liying ZHU and 立颖 朱","doi":"10.1088/2058-6272/ad718b","DOIUrl":"https://doi.org/10.1088/2058-6272/ad718b","url":null,"abstract":"In the space plasma environment, primary discharge may occur on the solar array and evolve into a destructive sustained arc, which threatens the safe operation of the spacecraft. Based on the plasma expansion fluid theory, a new multicomponent plasma expansion model is proposed in this study, which takes into account the effects of ion species, ion number, initial discharge current, and Low Earth Orbit (LEO) plasma environment. The expansion simulation of single-component and multicomponent ions is carried out respectively, and the variations of plasma number density, expansion distance, and speed during the expansion process are obtained. Compared with the experimental results, the evolution of propagation distance and speed is closed and the error is within a reasonable range, which verifies the validity and rationality of the model. The propagation characteristics of the primary discharge on the solar array surface and the influence of the initial value on the maximum propagation distance and the propagation current peaks are investigated. This study can provide important theoretical support for the propagation and evolution of the primary discharge and the key behavior of the transition to secondary discharge on spacecraft solar array.","PeriodicalId":20227,"journal":{"name":"","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142265082","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
Cryopreservation of bovine sperm causes single-strand DNA breaks that are localized in the toroidal regions of chromatin. 对牛精子进行低温保存会导致单链 DNA 断裂,这些断裂位于染色质的环状区域。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-10-12 DOI: 10.1186/s40104-024-01099-0
Jordi Ribas-Maynou, Rodrigo Muiño, Carolina Tamargo, Marc Yeste
{"title":"Cryopreservation of bovine sperm causes single-strand DNA breaks that are localized in the toroidal regions of chromatin.","authors":"Jordi Ribas-Maynou, Rodrigo Muiño, Carolina Tamargo, Marc Yeste","doi":"10.1186/s40104-024-01099-0","DOIUrl":"https://doi.org/10.1186/s40104-024-01099-0","url":null,"abstract":"<p><strong>Background: </strong>Sperm cryopreservation is widely used in the cattle industry, as it allows for disassociating the localization of sires and the collection of semen from the timing of artificial insemination. While freeze-thawing is known to impair sperm DNA integrity, whether the damage induced consists of single- (SSB) or double-strand breaks (DSB) has not been determined. In addition, no previous study has addressed if DNA breaks preferentially reside in specific genome regions such as those forming the toroid linker regions, or are rather spread throughout the regions linked to protamines. The main aim of the present work, therefore, was to elucidate the type and localization of the DNA damage generated by cryopreservation and to evaluate its impact on artificial insemination outcomes in cattle.</p><p><strong>Results: </strong>The incidence of SSB and DSB was evaluated in 12 ejaculates before and after cryopreservation with the Comet assay, and the localization of the DNA breaks was assessed using pulsed-field gel electrophoresis (PFGE). Before cryopreservation, the incidence of SSB was 10.99% ± 4.62% and involved 20.56% ± 3.04% of sperm cells, whereas these figures significantly (P < 0.0001) increased up to 34.11% ± 3.48% and 53.36% ± 11.00% in frozen-thawed sperm. In contrast, no significant differences in the incidence of DSB were observed (P > 0.990) before and after cryopreservation (before: incidence of 13.91% ± 1.75% of sperm DNA affecting 56.04% ± 12.49% of sperm cells; after: incidence of 13.55% ± 1.55% of sperm DNA involving 53.36% ± 11.00% of sperm cells). Moreover, PFGE revealed that the percentage of sperm DNA fragments whose length was shorter than a toroid (< 31.5 kb) was greater (P < 0.0001) after (27.00% ± 4.26%) than before freeze-thawing (15.57% ± 4.53%). These differences indicated that the DNA breaks induced by cryopreservation affect the regions condensed in protamines, which are structured in toroids. On the other hand, in vivo fertility rates were associated to the incidence of SSB and DSB in frozen-thawed sperm (P = 0.032 and P = 0.005), but not with the size of the DNA fragments resulting from these breaks (P > 0.05).</p><p><strong>Conclusion: </strong>Cryopreservation of bovine sperm generates single-strand DNA breaks, which are mainly located in protamine-condensed toroidal regions. The incidence of DNA breaks in cryopreserved sperm has an impact on cattle fertility, regardless of the size of generated fragments.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142407269","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
Effects of dietary Lactobacillus postbiotics and bacitracin on the modulation of mucosa-associated microbiota and pattern recognition receptors affecting immunocompetence of jejunal mucosa in pigs challenged with enterotoxigenic F18+ Escherichia coli. 日粮乳酸杆菌后益生菌和杆菌肽对猪受到肠毒性 F18+ 大肠杆菌挑战时影响空肠黏膜免疫能力的黏膜相关微生物群和模式识别受体的调节作用。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-10-11 DOI: 10.1186/s40104-024-01098-1
Marcos Elias Duarte, Zixiao Deng, Sung Woo Kim
{"title":"Effects of dietary Lactobacillus postbiotics and bacitracin on the modulation of mucosa-associated microbiota and pattern recognition receptors affecting immunocompetence of jejunal mucosa in pigs challenged with enterotoxigenic F18<sup>+</sup> Escherichia coli.","authors":"Marcos Elias Duarte, Zixiao Deng, Sung Woo Kim","doi":"10.1186/s40104-024-01098-1","DOIUrl":"10.1186/s40104-024-01098-1","url":null,"abstract":"<p><strong>Background: </strong>Enterotoxigenic Escherichia coli (E. coli) is a threat to humans and animals that causes intestinal disorders. Antimicrobial resistance has urged alternatives, including Lactobacillus postbiotics, to mitigate the effects of enterotoxigenic E. coli.</p><p><strong>Methods: </strong>Forty-eight newly weaned pigs were allotted to NC: no challenge/no supplement; PC: F18<sup>+</sup> E. coli challenge/no supplement; ATB: F18<sup>+</sup> E. coli challenge/bacitracin; and LPB: F18<sup>+</sup> E. coli challenge/postbiotics and fed diets for 28 d. On d 7, pigs were orally inoculated with F18<sup>+</sup> E. coli. At d 28, the mucosa-associated microbiota, immune and oxidative stress status, intestinal morphology, the gene expression of pattern recognition receptors (PRR), and intestinal barrier function were measured. Data were analyzed using the MIXED procedure in SAS 9.4.</p><p><strong>Results: </strong>PC increased (P < 0.05) Helicobacter mastomyrinus whereas reduced (P < 0.05) Prevotella copri and P. stercorea compared to NC. The LPB increased (P < 0.05) P. stercorea and Dialister succinatiphilus compared with PC. The ATB increased (P < 0.05) Propionibacterium acnes, Corynebacterium glutamicum, and Sphingomonas pseudosanguinis compared to PC. The PC tended to reduce (P = 0.054) PGLYRP4 and increased (P < 0.05) TLR4, CD14, MDA, and crypt cell proliferation compared with NC. The ATB reduced (P < 0.05) NOD1 compared with PC. The LPB increased (P < 0.05) PGLYRP4, and interferon-γ and reduced (P < 0.05) NOD1 compared with PC. The ATB and LPB reduced (P < 0.05) TNF-α and MDA compared with PC.</p><p><strong>Conclusions: </strong>The F18<sup>+</sup> E. coli challenge compromised intestinal health. Bacitracin increased beneficial bacteria showing a trend towards increasing the intestinal barrier function, possibly by reducing the expression of PRR genes. Lactobacillus postbiotics enhanced the immunocompetence of nursery pigs by increasing the expression of interferon-γ and PGLYRP4, and by reducing TLR4, NOD1, and CD14.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142402153","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
Quantitative phase microscopies: accuracy comparison 定量相显微镜:精确度比较
Light-Science & Applications Pub Date : 2024-10-11 DOI: 10.1038/s41377-024-01619-7
Patrick C. Chaumet, Pierre Bon, Guillaume Maire, Anne Sentenac, Guillaume Baffou
{"title":"Quantitative phase microscopies: accuracy comparison","authors":"Patrick C. Chaumet, Pierre Bon, Guillaume Maire, Anne Sentenac, Guillaume Baffou","doi":"10.1038/s41377-024-01619-7","DOIUrl":"https://doi.org/10.1038/s41377-024-01619-7","url":null,"abstract":"<p>Quantitative phase microscopies (QPMs) play a pivotal role in bio-imaging, offering unique insights that complement fluorescence imaging. They provide essential data on mass distribution and transport, inaccessible to fluorescence techniques. Additionally, QPMs are label-free, eliminating concerns of photobleaching and phototoxicity. However, navigating through the array of available QPM techniques can be complex, making it challenging to select the most suitable one for a particular application. This tutorial review presents a thorough comparison of the main QPM techniques, focusing on their accuracy in terms of measurement precision and trueness. We focus on 8 techniques, namely digital holographic microscopy (DHM), cross-grating wavefront microscopy (CGM), which is based on QLSI (quadriwave lateral shearing interferometry), diffraction phase microscopy (DPM), differential phase-contrast (DPC) microscopy, phase-shifting interferometry (PSI) imaging, Fourier phase microscopy (FPM), spatial light interference microscopy (SLIM), and transport-of-intensity equation (TIE) imaging. For this purpose, we used a home-made numerical toolbox based on discrete dipole approximation (IF-DDA). This toolbox is designed to compute the electromagnetic field at the sample plane of a microscope, irrespective of the object’s complexity or the illumination conditions. We upgraded this toolbox to enable it to model any type of QPM, and to take into account shot noise. In a nutshell, the results show that DHM and PSI are inherently free from artefacts and rather suffer from coherent noise; In CGM, DPC, DPM and TIE, there is a trade-off between precision and trueness, which can be balanced by varying one experimental parameter; FPM and SLIM suffer from inherent artefacts that cannot be discarded experimentally in most cases, making the techniques not quantitative especially for large objects covering a large part of the field of view, such as eukaryotic cells.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404911","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
Light People: Prof. Daoxin Dai, Dr. Patrick Lo, and Prof. Yikai Su—innovators in silicon photonics 光人:硅光子学领域的创新者:戴道新教授、Patrick Lo 博士和苏义凯教授
Light-Science & Applications Pub Date : 2024-10-11 DOI: 10.1038/s41377-024-01650-8
Yating Wan, Chenzi Guo
{"title":"Light People: Prof. Daoxin Dai, Dr. Patrick Lo, and Prof. Yikai Su—innovators in silicon photonics","authors":"Yating Wan, Chenzi Guo","doi":"10.1038/s41377-024-01650-8","DOIUrl":"https://doi.org/10.1038/s41377-024-01650-8","url":null,"abstract":"<p>In this edition of <i>Light People</i>, we are excited to feature Prof. Daoxin Dai (Zhejiang University), Prof. Yikai Su (Shanghai Jiao Tong University), and Dr. Patrick Lo (Advanced Micro Foundry Pte Ltd, Singapore), three prominent researchers shaping the future of silicon photonics. Their collaborative work addresses critical issues in silicon photonics, including reducing propagation losses, enlarging the functionalities and enhancing building blocks, integrating efficient laser sources, expanding applications, and pushing the boundaries of optical and electronic integration. Through this interview, we delve into their academic journeys, challenges, and future visions, offering insights into the ongoing evolution of silicon photonics and its potential to transform industries. For a deeper exploration of their experiences and advice, the full interview is available in the Supplementary material.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142404910","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
Bacillus CotA laccase improved the intestinal health, amino acid metabolism and hepatic metabolic capacity of Pekin ducks fed naturally contaminated AFB1 diet. CotA 漆酶芽孢杆菌改善了饲喂自然污染 AFB1 日粮的北京鸭的肠道健康、氨基酸代谢和肝脏代谢能力。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-10-10 DOI: 10.1186/s40104-024-01091-8
Mingxin Ma, Qianqian Wang, Yanrong Liu, Guiming Li, Limeng Liu, Gaigai Wang, Yongpeng Guo, Shimeng Huang, Qiugang Ma, Cheng Ji, Lihong Zhao
{"title":"Bacillus CotA laccase improved the intestinal health, amino acid metabolism and hepatic metabolic capacity of Pekin ducks fed naturally contaminated AFB<sub>1</sub> diet.","authors":"Mingxin Ma, Qianqian Wang, Yanrong Liu, Guiming Li, Limeng Liu, Gaigai Wang, Yongpeng Guo, Shimeng Huang, Qiugang Ma, Cheng Ji, Lihong Zhao","doi":"10.1186/s40104-024-01091-8","DOIUrl":"10.1186/s40104-024-01091-8","url":null,"abstract":"<p><strong>Background: </strong>Aflatoxin B<sub>1</sub> (AFB<sub>1</sub>) is a prevalent contaminant in agricultural products, presenting significant risks to animal health. CotA laccase from Bacillus licheniformis has shown significant efficacy in degrading mycotoxins in vitro test. The efficacy of Bacillus CotA laccase in animals, however, remains to be confirmed. A 2 × 2 factorial design was used to investigate the effects of Bacillus CotA laccase level (0 or 1 U/kg), AFB<sub>1</sub> challenge (challenged or unchallenged) and their interactions on ducks. The purpose of this study was to evaluate the efficacy of Bacillus CotA laccase in alleviating AFB<sub>1</sub> toxicosis of ducks.</p><p><strong>Results: </strong>Bacillus CotA laccase alleviated AFB<sub>1</sub>-induced declines in growth performance of ducks accompanied by improved average daily gain (ADG) and lower feed/gain ratio (F/G). Bacillus CotA laccase ameliorated AFB<sub>1</sub>-induced gut barrier dysfunctions and inflammation testified by increasing the jejunal villi height/crypt depth ratio (VH/CD) and the mRNA expression of tight junction protein 1 (TJP1) and zonula occluden-1 (ZO-1) as well as decreasing the expression of inflammation-related genes in the jejunum of ducks. Amino acid metabolome showed that Bacillus CotA laccase ameliorated AFB<sub>1</sub>-induced amino acid metabolism disorders evidenced by increasing the level of glutamic acid in serum and upregulating the expression of amino acid transport related genes in jejunum of ducks. Bacillus CotA laccase ameliorated AFB<sub>1</sub>-induced liver injury testified by suppressing oxidative stress, inhibiting apoptosis, and downregulating the expression of hepatic metabolic enzyme related genes of ducks. Moreover, Bacillus CotA laccase degraded AFB<sub>1</sub> in digestive tract of ducks, resulting in the reduced absorption level of AFB<sub>1</sub> across intestinal epithelium testified by the decreased level of AFB<sub>1</sub>-DNA adduct in the liver, and the reduced content of AFB<sub>1</sub> residues in liver and feces of ducks.</p><p><strong>Conclusions: </strong>Bacillus CotA laccase effectively improved the growth performance, intestinal health, amino acid metabolism and hepatic aflatoxin metabolism of ducks fed AFB<sub>1</sub> diets, highlighting its potential as an efficient and safe feed enzyme for AFB<sub>1</sub> degradation in animal production.</p>","PeriodicalId":64067,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":null,"pages":null},"PeriodicalIF":6.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11465776/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142395628","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
Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGaxO4:Bi for dynamic anti-counterfeiting 用于动态防伪的单组分非全度 CaGaxO4:Bi 发出的随激发波长变化的持续发光
Light-Science & Applications Pub Date : 2024-10-10 DOI: 10.1038/s41377-024-01635-7
Bo-Mei Liu, Yue Lin, Yingchun Liu, Bibo Lou, Chong-Geng Ma, Hui Zhang, Jing Wang
{"title":"Excitation-wavelength-dependent persistent luminescence from single-component nonstoichiometric CaGaxO4:Bi for dynamic anti-counterfeiting","authors":"Bo-Mei Liu, Yue Lin, Yingchun Liu, Bibo Lou, Chong-Geng Ma, Hui Zhang, Jing Wang","doi":"10.1038/s41377-024-01635-7","DOIUrl":"https://doi.org/10.1038/s41377-024-01635-7","url":null,"abstract":"<p>Materials capable of dynamic persistent luminescence (PersL) within the visible spectrum are highly sought after for applications in display, biosensing, and information security. However, PersL materials with eye-detectable and excitation-wavelength-dependent characteristics are rarely achieved. Herein, a nonstoichiometric compound CaGa<sub>x</sub>O<sub>4</sub>:Bi (<i>x</i> &lt; 2) is present, which demonstrates ultra-long, color-tunable PersL. The persistent emission wavelength can be tuned by varying the excitation wavelength, enabling dynamic color modulation from the green to the orange region within the visible spectrum. Theoretical calculations, in conjunction with experimental observations, are utilized to elucidate the thermodynamic charge transitions of various defect states, thereby providing insights into the relationship between Bi<sup>3+</sup> emitters, traps, and multicolored PersL. Furthermore, the utility of color-tunable PersL materials and flexible devices is showcased for use in visual sensing of invisible ultraviolet light, multicolor display, information encryption, and anti-counterfeiting. These discoveries create new opportunities to develop smart photoelectric materials with dynamically controlled PersL for various applications.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142397669","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
Ultra-high brightness Micro-LEDs with wafer-scale uniform GaN-on-silicon epilayers 采用晶圆级均匀硅基氮化镓外延层的超高亮度 Micro-LED
Light-Science & Applications Pub Date : 2024-10-09 DOI: 10.1038/s41377-024-01639-3
Haifeng Wu, Xiao Lin, Qin Shuai, Youliang Zhu, Yi Fu, Xiaoqin Liao, Yazhou Wang, Yizhe Wang, Chaowei Cheng, Yong Liu, Lei Sun, Xinyi Luo, Xiaoli Zhu, Liancheng Wang, Ziwei Li, Xiao Wang, Dong Li, Anlian Pan
{"title":"Ultra-high brightness Micro-LEDs with wafer-scale uniform GaN-on-silicon epilayers","authors":"Haifeng Wu, Xiao Lin, Qin Shuai, Youliang Zhu, Yi Fu, Xiaoqin Liao, Yazhou Wang, Yizhe Wang, Chaowei Cheng, Yong Liu, Lei Sun, Xinyi Luo, Xiaoli Zhu, Liancheng Wang, Ziwei Li, Xiao Wang, Dong Li, Anlian Pan","doi":"10.1038/s41377-024-01639-3","DOIUrl":"https://doi.org/10.1038/s41377-024-01639-3","url":null,"abstract":"<p>Owing to high pixel density and brightness, gallium nitride (GaN) based micro-light-emitting diodes (Micro-LEDs) are considered revolutionary display technology and have important application prospects in the fields of micro-display and virtual display. However, Micro-LEDs with pixel sizes smaller than 10 μm still encounter technical challenges such as sidewall damage and limited light extraction efficiency, resulting in reduced luminous efficiency and severe brightness non-uniformity. Here, we reported high-brightness green Micro-displays with a 5 μm pixel utilizing high-quality GaN-on-Si epilayers. Four-inch wafer-scale uniform green GaN epilayer is first grown on silicon substrate, which possesses a low dislocation density of 5.25 × 10<sup>8</sup> cm<sup>−</sup><sup>2</sup>, small wafer bowing of 16.7 μm, and high wavelength uniformity (standard deviation STDEV &lt; 1 nm), scalable to 6-inch sizes. Based on the high-quality GaN epilayers, green Micro-LEDs with 5 μm pixel sizes are designed with vertical non-alignment bonding technology. An atomic sidewall passivation method combined with wet treatment successfully addressed the Micro-LED sidewall damages and steadily produced nano-scale surface textures on the pixel top, which unlocked the internal quantum efficiency of the high-quality green GaN-on-Si epi-wafer. Ultra-high brightness exceeding 10<sup>7</sup> cd/m<sup>2</sup> (nits) is thus achieved in the green Micro-LEDs, marking the highest reported results. Furthermore, integration of Micro-LEDs with Si-based CMOS circuits enables the realization of green Micro-LED displays with resolution up to 1080 × 780, realizing high-definition playback of movies and images. This work lays the foundation for the mass production of high-brightness Micro-LED displays on large-size GaN-on-Si epi-wafers.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142385081","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
Deep learning with photonic neural cellular automata 利用光子神经细胞自动机进行深度学习
Light-Science & Applications Pub Date : 2024-10-08 DOI: 10.1038/s41377-024-01651-7
Gordon H. Y. Li, Christian R. Leefmans, James Williams, Robert M. Gray, Midya Parto, Alireza Marandi
{"title":"Deep learning with photonic neural cellular automata","authors":"Gordon H. Y. Li, Christian R. Leefmans, James Williams, Robert M. Gray, Midya Parto, Alireza Marandi","doi":"10.1038/s41377-024-01651-7","DOIUrl":"https://doi.org/10.1038/s41377-024-01651-7","url":null,"abstract":"<p>Rapid advancements in deep learning over the past decade have fueled an insatiable demand for efficient and scalable hardware. Photonics offers a promising solution by leveraging the unique properties of light. However, conventional neural network architectures, which typically require dense programmable connections, pose several practical challenges for photonic realizations. To overcome these limitations, we propose and experimentally demonstrate Photonic Neural Cellular Automata (PNCA) for photonic deep learning with sparse connectivity. PNCA harnesses the speed and interconnectivity of photonics, as well as the self-organizing nature of cellular automata through local interactions to achieve robust, reliable, and efficient processing. We utilize linear light interference and parametric nonlinear optics for all-optical computations in a time-multiplexed photonic network to experimentally perform self-organized image classification. We demonstrate binary (two-class) classification of images using as few as 3 programmable photonic parameters, achieving high experimental accuracy with the ability to also recognize out-of-distribution data. The proposed PNCA approach can be adapted to a wide range of existing photonic hardware and provides a compelling alternative to conventional photonic neural networks by maximizing the advantages of light-based computing whilst mitigating their practical challenges. Our results showcase the potential of PNCA in advancing photonic deep learning and highlights a path for next-generation photonic computers.</p>","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384358","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
Dietary ferulic acid supplementation enhances antioxidant capacity and alleviates hepatocyte pyroptosis in diquat challenged piglets. 膳食中补充阿魏酸可提高抗氧化能力,缓解敌草快挑战仔猪肝细胞的脓毒症。
IF 6.3
Journal of Animal Science and Biotechnology Pub Date : 2024-10-07 DOI: 10.1186/s40104-024-01086-5
Junqiu Luo, Xiu Wu, Daiwen Chen, Bing Yu, Jun He
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