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Endo-microscopy beyond the Abbe and Nyquist limits

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Light(science & Applications) 2020年第1期9卷 1246-1257页

作者： Lyubov V.Amitonova Johannes f.de Boer LaserLaB Department of Physics and AstronomyVrije Universiteit AmsterdamDe Boelelaan 10811081 HV AmsterdamThe Netherlands Advanced Research Center for Nanolithography(ARCNL) Science Park 1061098 XG AmsterdamThe Netherlands

for several centuries,far-field optical microscopy has remained a key instrument in many scientific disciplines,including physical,chemical,and biomedical ***,far-field imaging has many limitations:the spatial resolution is controlled by the diffraction of light,and the imaging speed follows the Nyquist–shannon sampling *** recent development of super-resolution techniques has pushed the limits of spatial ***,these methods typically require complicated setups and long acquisition times and are still not applicable to deeptissue ***,we report imaging through an ultra-thin fibre probe with a spatial resolution beyond the Abbe limit and a temporal resolution beyond the Nyquist limit simultaneously in a simple and compact *** use the random nature of mode coupling in a multimode fibre,the sparsity constraint and compressive sensing *** new approach of super-resolution endo-microscopy does not use any specific properties of the fluorescent label,such as depletion or stochastic activation of the molecular fluorescent state,and therefore can be used for label-free *** demonstrate a spatial resolution more than 2 times better than the diffraction limit and an imaging speed 20 times faster than the Nyquist *** proposed approach can significantly expand the realm of the application of nanoscopy for bioimaging.

关键词： beyond limit fibre

Ads/QCD and light front holography: A new approximation to QCD

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Chinese Physics C 2010年第9期34卷 1229-1235页

作者： stanley J.Brodsky Guy f.de Téramond sLAC National Accelerator Laboratory Stanford University Universidad de Costa Rica

The combination of Anti-de sitter space （Ads） methods with light-front holography leads to a semi-classical first approximation to the spectrum and wavefunctions of meson and baryon light-quark bound *** from the bound-state Hamiltonian equation of motion in QCD,we derive relativistic lightfront wave equations in terms of an invariant impact variable ζ which measures the separation of the quark and gluonic constituents within the hadron at equal light-front *** equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti–de sitter （Ads） *** eigenvalues give the hadronic spectrum,and its eigenmodes represent the probability distributions of the hadronic constituents at a given *** to the light meson and baryon spectra are *** predicted meson spectrum has a string-theory Regge form M^ 2 = 4κ ^2 （n＋L＋s/2）;i.e.,the square of the eigenmass is linear in both L and n,where n counts the number of nodes of the wavefunction in the radial variable ζ.The space-like pion and nucleon form factors are also well *** thus obtains a remarkable connection between the description of hadronic modes in Ads space and the Hamiltonian formulation of QCD in physical space-time quantized on the light-front at fixed light-front time τ.The model can be systematically improved by using its complete orthonormal solutions to diagonalize the full QCD lightfront Hamiltonian or by applying the Lippmann-schwinger method in order to systematically include the QCD interaction terms.

关键词： gauge/gravity correspondence light-front dynamics strongly coupled QCD meson and baryon spectrum meson and nucleon form factors

Oligodendroglial heterogeneity in health,disease,and recovery:deeper insights into myelin dynamics

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Neural Regeneration Research 2025年第11期20卷 3179-3192页

作者： Pieter-Jan serneels Julie D.de schutter Lies de Groef Lieve Moons steven Bergmans KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionNeural Circuit Development&Regeneration Research GroupLeuvenBelgium KU Leuven Leuven Brain InstituteDepartment of BiologyAnimal Physiology and Neurobiology DivisionCellular Communication&Neurodegeneration Research GroupLeuvenBelgium

decades of research asserted that the oligodendroglial lineage comprises two cell types:oligodendrocyte precursor cells and ***,recent studies employing single-cell RNA sequencing techniques have uncovered novel cell states,prompting a revision of the existing *** forward,the oligodendroglial lineage should be delineated into five distinct cell states:oligodendrocyte precursor cells,committed oligodendrocyte precursor cells,newly formed oligodendrocytes,myelin-forming oligodendrocytes,and mature *** new classification system enables a deeper understanding of the oligodendroglia in both physiological and pathological *** this uniform terminology will facilitate comparison and integration of data across ***,including the consolidation of findings from various demyelinating models,is essential to better understand the pathogenesis of.demyelinating ***,comparing injury models across species with varying regenerative capacities can provide insights that may lead to new therapeutic strategies to overcome remyelination ***,by standardizing terminology and synthesizing data from diverse studies across different animal models,we can enhance our understanding of myelin pathology in central nervous system disorders such as multiple sclerosis,Alzheimer's disease,and amyotrophic lateral sclerosis,all of which involve oligodendroglial and myelin dysfunction.

关键词： animal models demyelination fish mammals multiple sclerosis myelin neurodegeneration oligodendrocytes oligodendroglial lineage remyelination

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Journal of Energy Chemistry 2022年第10期31卷 88-113,I0003页

作者： Magno B.Costa Moisés A.de Araújo Marcos V.de Lima Tinoco Juliana f.de Brito Lucia H.Mascaro departamento de Química Universidade Federal de São CarlosRodovia Washington Luizkm 235São CarlosSão Paulo 13565-905Brazil Instituto de Química de são Carlos Universidade de São PauloAvenida Trabalhador Sancarlense400São CarlosSão Paulo 13566-590Brazil Instituto de Química Universidade Estadual PaulistaRua Professor Francisco Degnis/nAraraquaraSão Paulo 14800-900Brazil

This review shows the importance of WO_(3)photoanode as a potentially low-cost,efficient,stable,and photoactive material for light-driven water *** such,this manuscript aims to review the most recent publications regarding the strategies to improve the phoelectroactivity of WO_(3)films for water *** addition,this review aims to graphically highlight and discuss the general trendings of the photocurrent density response and stability test of the recent outstanding studies in the literature for photoelectrochemical water splitting *** strategies covered in this review will not only concern the WO_(3)morphology and crystal plane growth,but also the many arrangements possibilities to improve the WO_(3)efficiency for water photoelectrooxidation,such as defect engineering based on oxygen vacancies,doping,decorations,and homo and *** these strategies are compared by the photocurrent density results and by the stability of these *** best results in this sense were observed in cases where the use of heterojunction was applied together with a desired morphology and crystal plane of the WO_(3)***,the modifications that caused a decrease in the photocurrent density reaching values that are even lower than the pure WO_(3)were also *** this way,this review intends to improve the knowledge about the synthesis and design of WO_(3)photoanodes to further obtain an efficient photocatalyst to minimize the recombination losses or losses across the interfaces and improve the photoelectroactivity for water splitting in the large-scale application.

关键词： solar energy H_(2)production N-type semiconductor Photoelectrode design Oxygen evolution reaction

Laser therapy on points of acupuncture on nerve repair

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Neural Regeneration Research 2016年第4期11卷 557-558页

作者： Renata f.de Oliveira Patrícia M.de freitas special Laboratory of Lasers in dentistry (LELO) Department of Restorative DentistrySchool of DentistryUniversity of S?o Paulo (USP)

Paresthesia is the name given to a temporary or permanent sensory loss caused by several surgical procedures that affected the peripheral sensory *** dentistry,common iatrogenic procedures that can lead to sensory los... 详细信息

关键词： Laser therapy on points of acupuncture on nerve repair

Merging bound states in the continuum in an open acoustic resonator

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science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 124-131页

作者： Lujun Huang Bin Jia Artem s.Pilipchuk sibo Huang Chen shen Almas f.sadreev Yong Li Andrey E.Miroshnichenko school of Physics and Electronic sciences East China Normal University Institute of Acoustics Tongji University L.V.Kirensky Institute of Physics department of Mechanical Engineering Rowan University school of Engineering and Technology University of New South Wales at Canberra

Bound states in the continuum （BICs） are perfectly localized resonances despite embedding in the continuum ***,an isolated BIC is very sensitive to the structure ***,we report merging acoustic BICs in a single open resonator,robust against the structure *** find that both symmetry-protected BIC and friedrich-Wintgen BIC are sustained in a single coupled waveguide-resonator *** varying the height and length of the resonator,these two BICs move toward each other and merge into a single one at a critical *** to an individual BIC,the merged BIC is robust against fabrication error because its Q-factor is proportional to ΔL-4,whereΔL embodies the structure *** essence of this extraordinary phenomenon is perfectly explained by the two-and three-level approximations of the effective nonHermitian ***,we present direct experimental demonstrations of the moving and merging of BICs in a coupled 3D waveguide-resonator,which are evidenced by the vanishing of the linewidth of fano resonance in the transmission *** results may find exciting applications in designing high-quality acoustic sources,sensors and filters.

关键词： acoustic resonances bound state in the continuum high-Q resonances

Wintering swan Geese maximize energy intake through substrate foraging depth when feeding on buried Vallisneria natans tubers

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Avian Research 2019年第2期10卷 163-170页

作者： Yan Chen Yong Zhang Lei Cao Willem f.de Boer Anthony D.fox school of Life sciences University of Science and Technology of ChinaHefei 230027China Co-Innovation Center for sustainable forestry in southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037China Research Center for Eco-Environmental science Chinese Academic of Sciences18 Shuangqing RoadBeijing 100085China University of Chinese Academy of sciences 19 Yuquan RoadShijingshan DistrictBeijing 100049China Resource Ecology Group Wageningen UniversityDroevendaalsesteeg3a6708 PB WageningenThe Netherlands department of Bioscience Aarhus UniversityKalφGrenavej 148410 RφndeDenmark

Background: foraging theory predicts that animals select patches that offer the highest net rate of energy gain. Hence, prey distribution patterns and spatiotemporal heterogeneity play important roles in determining animal feeding patch selection. for waterfowl foraging on buried aquatic plant tubers, the distribution and biomass of these plant organs vary with depth in the substrate. since excavation costs also increase with depth, the energy intake of the animals foraging on these plants is highly sediment depth dependent. Methods: Here, using observations of swan Geese (Anser cygnoides) foraging on Vallisneria natans tubers, we test our hypothesis that geese feeding on tubers buried at intermediate sediment depth maximize their daily energy intake because of the interaction between tuber size and abundance with depth. To do this, we measured the distribution patterns of buried Vallisneria tubers under both undisturbed conditions and post-exploitation by geese (i.e. giving-up conditions). We investigated the relationship between tuber size and burial depth, and total tuber biomass within each sediment layer in undisturbed and exploited plots. finally, we compared modelled swan Goose daily energy intake feeding on Vallisneria tubers buried at different sediment layers (1–10, 11–20 and 21–30 cm below the surface). Results: Dry weight of Vallisneria tubers linearly increased with burial depth, while average total dry weight density of tubers showed a unimodal relationship, peaking at intermediate levels. Not surprisingly, swan Geese foraged most intensively on tubers buried at intermediate sediment depths, where they maximize their daily energy intake. Our results support our hypothesis that swan Geese feeding on tubers at intermediate depths maximize their daily energy intake. Conclusions: Our study is the first to quantify foraging strategies of swan Geese during the wintering period, emphasizing the importance of plant traits on foraging selection of belowground f

关键词： Energetic trade-off Optimal foraging shengjin Lake substrate Tuber burial depth Yangtze River

Machine learning algorithm partially reconfigured on fPGA for an image edge detection system

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Journal of Electronic science and Technology 2024年第2期22卷 48-68页

作者： Gracieth Cavalcanti Batista Johnny Oberg Osamu saotome Haroldo f.de Campos Velho Elcio Hideiti shiguemori Ingemar soderquist Division of Electronic and Embedded systems KTH Royal Institute of TechnologyStockholm 16440Sweden Electronic Engineering Division Aeronautics Institute of TechnologySao Josédos Campos SP 12228-900Brazil Laboratory of Applied Computing and Mathematics National Institute for Space ResearchSao Josédos Campos SP 12227-900Brazil department of C4IsR Institute of Advanced StudiesSao Josédos Campos SP 12228-001Brazil saab AB Linkoping 58188Sweden

Unmanned aerial vehicles(UAVs)have been widely used in military,medical,wireless communications,aerial surveillance,*** key topic involving UAVs is pose estimation in autonomous navigation.A standard procedure for this process is to combine inertial navigation system sensor information with the global navigation satellite system(GNss)***,some factors can interfere with the GNss signal,such as ionospheric scintillation,jamming,or *** alternative method to avoid using the GNss signal is to apply an image processing approach by matching UAV images with georeferenced *** a high effort is required for image edge *** a support vector regression(sVR)model is proposed to reduce this computational load and processing *** dynamic partial reconfiguration(DPR)of part of the sVR datapath is implemented to accelerate the process,reduce the area,and analyze its granularity by increasing the grain size of the reconfigurable *** show that the implementation in hardware is 68 times faster than that in *** architecture with DPR also facilitates the low power consumption of 4 mW,leading to a reduction of 57%than that without *** is also the lowest power consumption in current machine learning hardware ***,the circuitry area is 41 times *** with Gaussian kernel shows a success rate of 99.18%and minimum square error of 0.0146 for testing with the planning *** system is useful for adaptive applications where the user/designer can modify/reconfigure the hardware layout during its application,thus contributing to lower power consumption,smaller hardware area,and shorter execution time.

关键词： Dynamic partial reconfiguration(DPR) field programmable gate array(fPGA)implementation Image edge detection support vector regression(sVR) Unmanned aerial vehicle(UAV) pose estimation

Improving the quantification of waterfowl migration with remote sensing and bird tracking

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science Bulletin 2015年第23期60卷 1984-1993页

作者： Yali si Qinchuan Xin Herbert H.T.Prins Willem f.de Boer Peng Gong Ministry of Education Key Laboratory for Earth system Modeling Center for Earth System Science Tsinghua University Joint Center for Global Change studies Resource Ecology Group Wageningen University

Accurately quantifying waterfowl migration patterns is pertinent to monitor ecosystem health and control bird-borne infectious diseases. In this review, we summarize the current understanding of the environmental mechanisms that drive waterfowl migration and then investigate the effect of intra- and inter-annual change in food supply and temperature(e.g., climate change) on their migration patterns. Recent advances in remote sensing and animal tracking techniques make it possible to monitor these environmental factors over a wide range of scales and record bird movements in detail. The synergy of these techniques will facilitate substantial progress in our understanding of the environmental drivers of bird migration. We identify prospects for future studies to test existing hypotheses and develop models integrating up-todate knowledge, high-resolution remote sensing data and high-accuracy bird tracking data. This will allow us to predict when waterfowl will be where, in response to shortand long-term global environmental change.

关键词： Waterfowl migration · Environmentaldrivers · Phenology · stopover ·Remote sensing ·Bird tracking