4,336 results match your criteria spatial dimension


[Access to health care throughout the country].

Authors:
A Kis J Augustin

Hautarzt 2021 Nov 30. Epub 2021 Nov 30.

Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), Martinistr. 52, 20251, Hamburg, Deutschland.

The legal basis for describing the regional care situation is based on the adjusted supply rate of the 'demand planning guideline'. However, it provides only limited information about the accessibility of medical care which is crucial for the reality of patients' lives. The aim of this review is to present geographic approaches that spatially measure access to dermatological care in its physical and digital dimension. Read More

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November 2021

Target-background segregation in a spatial interference paradigm reveals shared and specific attentional mechanisms triggered by gaze and arrows.

J Exp Psychol Hum Percept Perform 2021 Nov;47(11):1561-1573

Mind, Brain and Behavior Research Center (CIMCYC), University of Granada.

Recent research has found that eye gaze and arrows yield opposite congruency effects in a spatial interference paradigm, arrows eliciting faster responses when their direction is congruent with their position (standard congruency effect), and gaze producing faster reaction times for incongruent conditions (reversed congruency effect). In addition, we observed by serendipity in a previous study that the standard effect with arrows was reduced when the target appeared within a complex background, presumably because of hindered figure-ground segregation. Under the same conditions, the reversed effect with gaze became more negative. Read More

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November 2021

The environmental Kuznets curve for Turkish provinces: a spatial panel data approach.

Environ Sci Pollut Res Int 2021 Nov 29. Epub 2021 Nov 29.

Business School, Edge Hill University, Ormskirk, L39 4QP, Lancashire, UK.

This paper aims to test the existence of the environmental Kuznets curve (EKC) hypothesis using SO2 measurements in Turkish provinces between 2004 and 2019. The existing studies concerning the EKC hypothesis for Turkey either use a country-level analysis or panel data techniques covering provincial data that do not account for the spatial dimension. To account for the spatial dependence and overcome the biases resulting from the existence of such spatial spillovers, this paper combines the traditional panel data methodology with the recent advances in spatial econometrics. Read More

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November 2021

Cellular Features Revealed by Transverse Laser Modes in Frequency Domain.

Adv Sci (Weinh) 2021 Nov 28:e2103550. Epub 2021 Nov 28.

School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave., Singapore, 639798, Singapore.

Biological lasers which utilize Fabry-Pérot (FP) cavities have attracted tremendous interest due to their potential in amplifying subtle biological changes. Transverse laser modes generated from cells serve as distinct fingerprints of individual cells; however, most lasing signals lack the ability to provide key information about the cell due to high complexity of transverse modes. The missing key, therefore, hinders it from practical applications in biomedicine. Read More

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November 2021

An Anti-Jamming Method against Two-Dimensional Deception Jamming by Spatial Location Feature Recognition.

Sensors (Basel) 2021 Nov 19;21(22). Epub 2021 Nov 19.

The Institute of Information and Navigation, Air Force Engineering University, Xi'an 710077, China.

Interrupted sampling repeater jamming (ISRJ) is an effective method for implementing deception jamming on chirp radars. By means of frequency-shifting jamming processing of the target echo signal and pulse compression during image processing, a group of false targets will appear in different spatial locations around the true target. Extracting the features of these false targets is complex and limited to existing countering methods against ISRJ. Read More

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November 2021

Joint Feature-Space and Sample-Space Based Heterogeneous Feature Transfer Method for Object Recognition Using Remote Sensing Images with Different Spatial Resolutions.

Sensors (Basel) 2021 Nov 14;21(22). Epub 2021 Nov 14.

Defense Innovation Institute, Academy of Military Sciences (AMS), Beijing 100000, China.

To improve the classification results of high-resolution remote sensing images (RSIs), it is necessary to use feature transfer methods to mine the relevant information between high-resolution RSIs and low-resolution RSIs to train the classifiers together. Most of the existing feature transfer methods can only handle homogeneous data (i.e. Read More

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November 2021

TSMG: A Deep Learning Framework for Recognizing Human Learning Style Using EEG Signals.

Brain Sci 2021 Oct 24;11(11). Epub 2021 Oct 24.

Department of Optical-Electrical & Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

Educational theory claims that integrating learning style into learning-related activities can improve academic performance. Traditional methods to recognize learning styles are mostly based on questionnaires and online behavior analyses. These methods are highly subjective and inaccurate in terms of recognition. Read More

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October 2021

Anisotropic 2D excitons unveiled in organic-inorganic quantum wells.

Mater Horiz 2021 Jan 16;8(1):197-208. Epub 2020 Jul 16.

The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Two-dimensional (2D) excitons arise from electron-hole confinement along one spatial dimension. Such excitations are often described in terms of Frenkel or Wannier limits according to the degree of exciton spatial localization and the surrounding dielectric environment. In hybrid material systems, such as the 2D perovskites, the complex underlying interactions lead to excitons of an intermediate nature, whose description lies somewhere between the two limits, and a better physical description is needed. Read More

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January 2021

A multi-scale map of cell structure fusing protein images and interactions.

Nature 2021 Nov 24. Epub 2021 Nov 24.

Department of Medicine, University of California San Diego, La Jolla, CA, USA.

The cell is a multi-scale structure with modular organization across at least four orders of magnitude. Two central approaches for mapping this structure-protein fluorescent imaging and protein biophysical association-each generate extensive datasets, but of distinct qualities and resolutions that are typically treated separately. Here we integrate immunofluorescence images in the Human Protein Atlas with affinity purifications in BioPlex to create a unified hierarchical map of human cell architecture. Read More

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November 2021

Feature-extraction and analysis based on spatial distribution of amino acids for SARS-CoV-2 Protein sequences.

Comput Biol Med 2021 Nov 10:105024. Epub 2021 Nov 10.

Faculty of Engineering and Information Technology, University of Technology Sydney, NSW, Australia. Electronic address:

Background And Objective: The world is currently facing a global emergency due to COVID-19, which requires immediate strategies to strengthen healthcare facilities and prevent further deaths. To achieve effective remedies and solutions, research on different aspects, including the genomic and proteomic level characterizations of SARS-CoV-2, are critical. In this work, the spatial representation/composition and distribution frequency of 20 amino acids across the primary protein sequences of SARS-CoV-2 were examined according to different parameters. Read More

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November 2021

Observing two-particle Anderson localization in linear disordered photonic lattices.

Opt Express 2021 Nov;29(24):40428-40446

We theoretically and systematically investigate Anderson localization of two bosons with nearest-neighbor interaction in one dimension under short- and long-time scales, two types of disorders, and three types of initial states, which can be directly observed in linear disordered photonic lattices via two experimentally measurable physical quantities, participation ratio and spatial correlation. We find that the behavior of localization characterized by the participation ratio depends on the strength of interaction and the type of disorder and initial condition. Two-boson spatial correlation reveals more novel and unique features. Read More

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November 2021

4D line-scan hyperspectral imaging.

Opt Express 2021 Oct;29(21):34835-34849

This paper proposes a 4D line-scan hyperspectral imager that combines 3D geometrical measurement and spectral detection with high spectral resolution and spatial accuracy. We investigated the geometrical optical model of a camera attaching with a spectrograph, theoretically explored the mathematical model for line-scan fringe projection profilometry, and established the 3D reconstruction and calibration methods under this proposed line-scan high-dimensional imaging system. The spectral resolution of the system is 2. Read More

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October 2021

Static full-Stokes Fourier transform imaging spectropolarimeter capturing spectral, polarization, and spatial characteristics.

Opt Express 2021 Nov;29(23):38623-38645

A static full-Stokes Fourier transform imaging spectropolarimeter incorporating a liquid-crystal polarization modulator (LPM) and birefringent shearing interferometer (BSI) is reported. It can decode the polarization information at each wavelength along the spatial dimension of a two-dimensional data array. The LPM has a high-speed time-division architecture and employs two ferroelectric liquid crystals and two wave plates to produce four polarization states, providing full-Stokes polarimetric information with a high signal-to-noise ratio. Read More

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November 2021

Binocular dynamic holographic floating image display.

Opt Express 2021 Nov;29(23):38615-38622

This paper proposes a binocular holographic floating display. The device consists of two phase-modulation spatial light modulators (SLM) and a dihedral corner reflector array (DCRA) element. The conjugate images of the SLMs generated by the DCRA become the system's exit pupils. Read More

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November 2021

1-μm spatial resolution in silicon photon-counting CT detectors.

J Med Imaging (Bellingham) 2021 Nov 18;8(6):063501. Epub 2021 Nov 18.

KTH Royal Institute of Technology, Department of Physics, Stockholm, Sweden.

Spatial resolution for current scintillator-based computed tomography (CT) detectors is limited by the pixel size of about 1 mm. Direct conversion photon-counting detector prototypes with silicon- or cadmium-based detector materials have lately demonstrated spatial resolution equivalent to about 0.3 mm. Read More

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November 2021

Development of high-resolution spatio-temporal models for ambient air pollution in a metropolitan area of China from 2013 to 2019.

Chemosphere 2021 Nov 16:132918. Epub 2021 Nov 16.

Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, USA; RENEW Institute, University at Buffalo, Buffalo, NY, USA; Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA, USA. Electronic address:

Modeling high-resolution air pollution concentrations is essential to accurately assess exposure for population studies. The aim of this study is to establish an advanced exposure model to predict spatiotemporal changes in fine particulate matter (PM), nitrogen dioxides (NO), and ozone (O) concentrations in Shanghai, China. The model is constructed on a geo-statistical modeling framework that incorporates a dimension reduction regression approach and a spatial smoothing function to deal with fine-scale exposure variations. Read More

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November 2021

From conventional healthcare to e-health: Social and spatial transformation. Using a comparison between Hong Kong and Mainland China.

Authors:
Carine Milcent

J Clin Transl Res 2021 Oct 29;7(5):701-711. Epub 2021 Sep 29.

Department of Economics, French National Centre for Scientific Research, Paris School of Economics, Paris, France.

Background And Aim: Does spatial organization of healthcare access still matter in China? I assess how e-health has transformed the notion of healthcare access and what spatial dimension of healthcare means in China today and in the near future. I also consider a dynamic perspective to propose keys to anticipate upcoming changes. Hong Kong has a very efficient healthcare system with a dense network of high-level hospitals and a high level of healthcare access. Read More

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October 2021

Observation of nucleic acid and protein correlation in chromatin of HeLa nuclei using small-angle neutron scattering with D_{2}O-H_{2}O contrast variation.

Phys Rev E 2021 Oct;104(4-1):044404

Petersburg Nuclear Physics Institute named by B.P.Konstantinov of NRC Kurchatov Institute, Gatchina, St-Petersburg 188300, Russia.

The small-angle neutron scattering (SANS) on HeLa nuclei demonstrates the bifractal nature of the chromatin structural organization. The border line between two fractal structures is detected as a crossover point at Q_{c}≈4×10^{-2}nm^{-1} in the momentum transfer dependence Q^{-D}. The use of contrast variation (D_{2}O-H_{2}O) in SANS measurements reveals clear similarity in the large scale structural organizations of nucleic acids (NA) and proteins. Read More

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October 2021

Spin-s spin-glass phases in the d=3 Ising model.

Phys Rev E 2021 Oct;104(4-1):044131

Faculty of Engineering and Natural Sciences, Kadir Has University, Cibali, Istanbul 34083, Turkey.

All higher-spin (s≥1/2) Ising spin glasses are studied by renormalization-group theory in spatial dimension d=3, exactly on a d=3 hierarchical model and, simultaneously, by the Migdal-Kadanoff approximation on the cubic lattice. The s-sequence of global phase diagrams, the chaos Lyapunov exponent, and the spin-glass runaway exponent are calculated. It is found that, in d=3, a finite-temperature spin-glass phase occurs for all spin values, including the continuum limit of s→∞. Read More

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October 2021

Inner hair cell stereocilia displacement in response to focal stimulation of the basilar membrane in the ex vivo gerbil cochlea.

Hear Res 2021 Oct 22;412:108372. Epub 2021 Oct 22.

Hearing Research Center, Department of Biomedical Engineering, Boston University, 44 Cummington Mall, Boston, 02215, MA, United States.

The inner hair cells in the mammalian cochlea transduce mechanical signals to electrical signals that provide input to the auditory nerve. The spatial-temporal displacement of the inner hair cell stereocilia (IHCsc) relative to basilar membrane (BM) displacement is central to characterizing the transduction process. This study specifically focuses on measuring displacement of the stereocilia hair bundles in the radial dimensions where they are most sensitive. Read More

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October 2021

The Link between Landscape Characteristics and Soil Losses Rates over a Range of Spatiotemporal Scales: Hubei Province, China.

Int J Environ Res Public Health 2021 10 21;18(21). Epub 2021 Oct 21.

The College of Urban & Environmental Sciences, Central China Normal University, Wuhan 430079, China.

Controlling soil erosion is beneficial to the conservation of soil resources and ecological restoration. Understanding the spatial distribution characteristics of soil erosion helps find the key areas for soil control projects and optimal scale for investing in a soil and water conservation project at the lowest cost. This study aims to answer the question of how the spatial distribution of soil erosion in Hubei Province changed between 2000 and 2020. Read More

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October 2021

Clustering functional data using forward search based on functional spatial ranks with medical applications.

Stat Methods Med Res 2021 Nov 10:9622802211002865. Epub 2021 Nov 10.

Institute of Applied Health Research, University of Birmingham, Birmingham, UK.

Cluster analysis of functional data is finding increasing application in the field of medical research and statistics. Here we introduce a functional version of the forward search methodology for the purpose of functional data clustering. The proposed forward search algorithm is based on the functional spatial ranks and is a data-driven non-parametric method. Read More

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November 2021

Spatially Adaptive Feature Refinement for Efficient Inference.

IEEE Trans Image Process 2021 12;30:9345-9358. Epub 2021 Nov 12.

Spatial redundancy commonly exists in the learned representations of convolutional neural networks (CNNs), leading to unnecessary computation on high-resolution features. In this paper, we propose a novel Spatially Adaptive feature Refinement (SAR) approach to reduce such superfluous computation. It performs efficient inference by adaptively fusing information from two branches: one conducts standard convolution on input features at a lower spatial resolution, and the other one selectively refines a set of regions at the original resolution. Read More

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November 2021

Minority carrier decay length extraction from scanning photocurrent profiles in two-dimensional carrier transport structures.

Sci Rep 2021 Nov 8;11(1):21863. Epub 2021 Nov 8.

Graduate Institute of Electronics Engineering, National Taiwan University, No. 1, Roosevelt Rd. Sec. 4, Taipei, 10617, Taiwan.

Carrier transport was studied both numerically and experimentally using scanning photocurrent microscopy (SPCM) in two-dimensional (2D) transport structures, where the structure size in the third dimension is much smaller than the diffusion length and electrodes cover the whole terminal on both sides. Originally, one would expect that with increasing width in 2D transport structures, scanning photocurrent profiles will gradually deviate from those of the ideal one-dimensional (1D) transport structure. However, the scanning photocurrent simulation results surprisingly showed almost identical profiles from structures with different widths. Read More

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November 2021

Spatial spillover effects from agriculture drive deforestation in Mato Grosso, Brazil.

Sci Rep 2021 Nov 8;11(1):21804. Epub 2021 Nov 8.

Vienna University of Economics and Business (WU), Welthandelsplatz 1, 1020, Vienna, Austria.

Deforestation of the Amazon rainforest is a threat to global climate, biodiversity, and many other ecosystem services. In order to address this threat, an understanding of the drivers of deforestation processes is required. Spillover effects and factors that differ across locations and over time play important roles in these processes. Read More

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November 2021

Supernumerary roots in maxillary deciduous canines: A rare anomaly with a long history.

Arch Oral Biol 2021 Dec 23;132:105292. Epub 2021 Oct 23.

Laboratory of Bioanthropology and Ancient DNA, Faculties of Medicine and Dental Medicine, Hebrew University, Jerusalem, Israel. Electronic address:

Objective: To describe two maxillary deciduous bi-rooted canines, one archeological and one modern, and examine the possible etiology of this condition.

Design: Two cases of bi-rooted canines were described and compared to published examples. Both specimens were radiographed and measured and compared to one-rooted samples. Read More

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December 2021

Pattern formation from spatially heterogeneous reaction-diffusion systems.

Philos Trans A Math Phys Eng Sci 2021 Dec 8;379(2213):20210001. Epub 2021 Nov 8.

Department of Mathematics and Statistics, University of Otago, PO Box 56, Dunedin 9054, New Zealand.

First proposed by Turing in 1952, the eponymous Turing instability and Turing pattern remain key tools for the modern study of diffusion-driven pattern formation. In spatially homogeneous Turing systems, one or a few linear Turing modes dominate, resulting in organized patterns (peaks in one dimension; spots, stripes, labyrinths in two dimensions) which repeats in space. For a variety of reasons, there has been increasing interest in understanding irregular patterns, with spatial heterogeneity in the underlying reaction-diffusion system identified as one route to obtaining irregular patterns. Read More

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December 2021

Beyond Single Discrete Responses: An Integrative and Multidimensional Analysis of Behavioral Dynamics Assisted by Machine Learning.

Front Behav Neurosci 2021 19;15:681771. Epub 2021 Oct 19.

Escuela de Ingeniería, Universidad Anáhuac, Xalapa, Mexico.

Understanding behavioral systems as emergent systems comprising the environment and organism subsystems, include spatial dynamics as a primary dimension in natural settings. Nevertheless, under the standard approaches, the experimental analysis of behavior is based on the single response paradigm and the temporal distribution of discrete responses. Thus, the continuous analysis of spatial behavioral dynamics is a scarcely studied field. Read More

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October 2021

Simulated Performance of Electroenzymatic Glutamate Biosensors In Vivo Illuminates the Complex Connection to Calibration In Vitro.

ACS Chem Neurosci 2021 11 4;12(22):4275-4285. Epub 2021 Nov 4.

Chemical and Biomolecular Engineering Department, University of California, Los Angeles, California 90095-1592, United States.

Detailed simulations show that the relationship between electroenzymatic glutamate (Glut) sensor performance in vitro and that modeled in vivo is complicated by the influence of both resistances to mass transfer and clearance rates of Glut and HO in the brain extracellular space (ECS). Mathematical modeling provides a powerful means to illustrate how these devices are expected to respond to a variety of conditions in vivo in ways that cannot be accomplished readily using existing experimental techniques. Through the use of transient model simulations in one spatial dimension, it is shown that the sensor response in vivo may exhibit much greater dependence on HO mass transfer and clearance in the surrounding tissue than previously thought. Read More

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November 2021

Cartography as Spatial Representation: A new assessment of the competing advantages and drawbacks across fields of science.

J Percept Imaging 2021 18;Human Vision and Electronic Imaging 2021:1561-15610. Epub 2021 Jan 18.

Smith-Kettlewell Eye Research Institute.

The history of cartography has been marked by the endless search for the perfect form for the representation of the information on a spherical surface manifold into the flat planar format of the printed page or computer screen. Dozens of cartographic formats have been proposed over the centuries from ancient Greek times to the present. This is an issue not just for the mapping of the globe, but in all fields of science where spherical entities are found. Read More

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January 2021