19,417 results match your criteria spatio-temporal evolution

A sensing network involving citizens for high spatio-temporal resolution monitoring of fugitive emissions from a petroleum pre-treatment plant.

Sci Total Environ 2021 May 29;791:148135. Epub 2021 May 29.

Biology Department, University of Bari, via Orabona, 4, 70126 Bari, Italy.

In this study an innovative sensing network consisting of eight photoionization detectors, meteorological sensors, a video camera and a telephonic system able to systematize the population complaints was developed for the monitoring of odor emissions. The development of monitoring approaches with high temporal and spatial resolution and actively involving citizens, is strategic in areas where relevant and also short-term emissive events frequently occur and the conventional approaches fail due to the high variability of fugitive emissions. Moreover, even if unpleasant odors are not necessarily direct triggers of health effects, they could be associated with the release of other harmful compounds. Read More

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Fusion of wildlife tracking and satellite geomagnetic data for the study of animal migration.

Mov Ecol 2021 Jun 11;9(1):31. Epub 2021 Jun 11.

School of Geography and Sustainable Development, Irvine Building, University of St Andrews, North Street, St Andrews, KY16 9AL, Scotland, UK.

Background: Migratory animals use information from the Earth's magnetic field on their journeys. Geomagnetic navigation has been observed across many taxa, but how animals use geomagnetic information to find their way is still relatively unknown. Most migration studies use a static representation of geomagnetic field and do not consider its temporal variation. Read More

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T2 heterogeneity as an in vivo marker of microstructural integrity in medial temporal lobe subfields in ageing and mild cognitive impairment.

Neuroimage 2021 Jun 9;238:118214. Epub 2021 Jun 9.

Bristol Medical School, University of Bristol, Institute of Clinical Neurosciences, Learning & Research Building at Southmead Hospital, Bristol BS10 5NB, UK; Clinical Neurosciences, North Bristol NHS Trust, Bristol, UK.

A better understanding of early brain changes that precede loss of independence in diseases like Alzheimer's disease (AD) is critical for development of disease-modifying therapies. Quantitative MRI, such as T2 relaxometry, can identify microstructural changes relevant to early stages of pathology. Recent evidence suggests heterogeneity of T2 may be a more informative MRI measure of early pathology than absolute T2. Read More

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Gravitational scaling analysis on spatial diffusion of COVID-19 in Hubei Province, China.

PLoS One 2021 11;16(6):e0252889. Epub 2021 Jun 11.

Department of Geography, College of Urban and Environmental Sciences, Peking University, Beijing, P.R. China.

The spatial diffusion of epidemic disease follows distance decay law in geography and social physics, but the mathematical models of distance decay depend on concrete spatio-temporal conditions. This paper is devoted to modeling spatial diffusion patterns of COVID-19 stemming from Wuhan city to Hubei province, China. The modeling approach is to integrate analytical method and experimental method. Read More

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Spatio-Temporal Autophagy Tracking with a Cell-Permeable, Water-Soluble, Peptide-Based, Autophagic Vesicle-Targeted Sensor.

ACS Sens 2021 Jun 11. Epub 2021 Jun 11.

Department of Chemical Sciences, Tata Institute of Fundamental Research, 1-Homi Bhabha Road, Colaba, Mumbai, Maharashtra 400005, India.

Autophagy is an essential cellular degradation process. Impaired autophagy has been linked to multiple disorders, including cancer and neurodegeneration. Tracking the autophagic flux in living cells will provide mechanistic insights into autophagy and will allow rapid screening of autophagy modulators as potential therapeutics. Read More

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Modelling the Impact of Robotics on Infectious Spread Among Healthcare Workers.

Front Robot AI 2021 25;8:652685. Epub 2021 May 25.

Department of Neurosurgery, Henan Provincial People's Hospital, Henan University People's Hospital, Henan University School of Medicine, Zhengzhou, China.

The Coronavirus disease 2019 (Covid-19) pandemic has brought the world to a standstill. Healthcare systems are critical to maintain during pandemics, however, providing service to sick patients has posed a hazard to frontline healthcare workers (HCW) and particularly those caring for elderly patients. Various approaches are investigated to improve safety for HCW and patients. Read More

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2019‒2020 Australian bushfire air particulate pollution and impact on the South Pacific Ocean.

Sci Rep 2021 Jun 10;11(1):12288. Epub 2021 Jun 10.

State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China.

During late 2019 and early 2020, Australia experienced one of the most active bushfire seasons that advected large emissions over the adjacent ocean. Herein, we present a comprehensive research on mixed atmospheric aerosol particulate pollution emitted by wildfires in the atmosphere and the ocean. Based on a wide range of physical and biochemical data, including the Aerosol Robotic Network, multi-satellite observations, and Argo floats, we investigated the spatio-temporal variations and mixed compositions of aerosol particles, deposition in the coastal waters of eastern Australia and the South Pacific Ocean, and biogeochemical responses in the water column. Read More

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Redefining the oceanic distribution of Atlantic salmon.

Sci Rep 2021 Jun 10;11(1):12266. Epub 2021 Jun 10.

National Institute of Aquatic Resources, Technical University of Denmark, Silkeborg, Denmark.

Determining the mechanisms driving range-wide reductions in Atlantic salmon marine survival is hindered by an insufficient understanding of their oceanic ecology and distribution. We attached 204 pop-up satellite archival tags to post-spawned salmon when they migrated to the ocean from seven European areas and maiden North American salmon captured at sea at West Greenland. Individuals migrated further north and east than previously reported and displayed increased diving activity near oceanographic fronts, emphasizing the importance of these regions as feeding areas. Read More

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Implicit Error, Uncertainty and Confidence in Visualization: an Archaeological Case Study.

IEEE Trans Vis Comput Graph 2021 Jun 10;PP. Epub 2021 Jun 10.

While we know that the visualization of quantifiable uncertainty impacts the confidence in insights, little is known about whether the same is true for uncertainty that originates from aspects so inherent to the data that they can only be accounted for qualitatively. Being embedded within an archaeological project, we realized how assessing such qualitative uncertainty is crucial in gaining a holistic and accurate understanding of regional spatio-temporal patterns of human settlements over millennia. We therefore investigated the impact of visualizing qualitative implicit errors on the sense-making process via a probe that deliberately represented three distinct implicit errors, i. Read More

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Hybridisation between dingoes and domestic dogs in proximity to Indigenous communities in northern Australia.

Aust Vet J 2021 Jun 9. Epub 2021 Jun 9.

Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Werombi Road, Camden, New South Wales, 2570, Australia.

In northern Australia, wild dog populations potentially interact with domestic dogs from remote communities, which would create opportunities for disease transmission at the wild-domestic interface. An example is rabies, in the event of an incursion into northern Australia. However, the likelihood of such wild-domestic interactions is ambiguous. Read More

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Emerging evidence of resource limitation in an Antarctic seabird metapopulation after 6 decades of sustained population growth.

Oecologia 2021 Jun 9. Epub 2021 Jun 9.

Department of Agriculture, Water and the Environment, Australian Antarctic Division, Channel Highway, Kingston, TAS, 7050, Australia.

The influence of resource limitation on spatio-temporal population dynamics is a fundamental theme in ecology and the concepts of carrying capacity, density dependence and population synchrony are central to this theme. The life history characteristics of seabirds, which include use of disjunct patches of breeding habitat, high coloniality during breeding, strong philopatry, and central-place foraging, make this group well suited to studying this paradigm. Here, we investigate whether density-dependent processes are starting to limit population growth in the Adélie penguin metapopulation breeding in the Windmill Islands, East Antarctica, after 6 decades of growth. Read More

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Near-Infrared Photoactivatable Immunomodulatory Nanoparticles for Combinational Immunotherapy of Cancer.

Front Chem 2021 24;9:701427. Epub 2021 May 24.

Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, China.

As a promising treatment option for cancer, immunotherapy can eliminate local and distant metastatic tumors and even prevent recurrence through boosting the body's immune system. However, immunotherapy often encounters the issues of limited therapeutic efficacy and severe immune-related adverse events in clinical practices, which should be mainly due to the non-specific accumulations of immunotherapeutic agents. Activatable immunomodulatory agents that are responsive to endogenous stimuli in tumor microenvironment can afford controlled immunotherapeutic actions, while they still face certain extent of off-target activation. Read More

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Event-Based Trajectory Prediction Using Spiking Neural Networks.

Front Comput Neurosci 2021 24;15:658764. Epub 2021 May 24.

CERCO UMR 5549, CNRS-Université Toulouse 3, Toulouse, France.

In recent years, event-based sensors have been combined with spiking neural networks (SNNs) to create a new generation of bio-inspired artificial vision systems. These systems can process spatio-temporal data in real time, and are highly energy efficient. In this study, we used a new hybrid event-based camera in conjunction with a multi-layer spiking neural network trained with a spike-timing-dependent plasticity learning rule. Read More

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PINIR: a comprehensive information resource for Pin-II type protease inhibitors.

BMC Plant Biol 2021 Jun 9;21(1):267. Epub 2021 Jun 9.

Biochemical Sciences Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune, 411008, India.

Background: Serine protease inhibitors belonging to the Potato type-II Inhibitor family Protease Inhibitors (Pin-II type PIs) are essential plant defense molecules. They are characterized by multiple inhibitory repeat domains, conserved disulfide bond pattern, and a tripeptide reactive center loop. These features of Pin-II type PIs make them potential molecules for protein engineering and designing inhibitors for agricultural and therapeutic applications. Read More

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Deletion of TLR2 erythro-myeloid progenitors leads to embryonic lethality in mice.

Eur J Immunol 2021 Jun 9. Epub 2021 Jun 9.

Laboratory of Immunobiology, Institute of Molecular Genetics of the Czech Academy of Sciences, Prague, Czech Republic.

Early embryonic hematopoiesis in mammals is defined by three successive waves of hematopoietic progenitors which exhibit a distinct hematopoietic potential and provide continuous support for the development of the embryo and adult organism. Although the functional importance of each of these waves has been analyzed, their spatio-temporal overlap and the lack of wave-specific markers hinders the accurate separation and assessment of their functional roles during early embryogenesis. We have recently shown that TLR2, in combination with c-kit, represents the earliest signature of emerging precursors of the second hematopoietic wave, erythro-myeloid precursors (EMPs). Read More

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Spatio-temporal variability in the Cladocera assemblage of a subtropical hypersaline lagoon.

Braz J Biol 2021 4;82:e236354. Epub 2021 Jun 4.

Instituto de Estudos do Mar Almirante Paulo Moreira, Departamento de Oceanografia, Divisão de Ecossistemas Marinhos, Arraial do Cabo, RJ, Brasil.

Cladocera represent an important zooplankton group because of their seasonal prominence in terms of abundance and their contribution in controlling primary production (phytoplankton). On a global scale, there are few studies on Cladocera in hypersaline environments. The present work aims to evaluate the spatio-temporal variation of the Cladocera assemblage across a salinity gradient in the habitats of the Araruama Lagoon. Read More

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PM10 and PM2.5 real-time prediction models using an interpolated convolutional neural network.

Sci Rep 2021 Jun 7;11(1):11952. Epub 2021 Jun 7.

Department of Business Administration, Korea Polytechnic University, 237 Sangidaehak-ro, Siheung-si, 15073, Gyeonggi-do, Republic of Korea.

In this paper, we propose a real-time prediction model that can respond to particulate matters (PM) in the air, which are an indication of poor air quality. The model applies interpolation to air quality and weather data and then uses a Convolutional Neural Network (CNN) to predict PM concentrations. The interpolation transforms the irregular spatial data into an equally spaced grid, which the model requires. Read More

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Variations in photoreceptor throughput to mouse visual cortex and the unique effects on tuning.

Sci Rep 2021 Jun 7;11(1):11937. Epub 2021 Jun 7.

Department of Psychology, University of Texas At Austin, 108 E. Dean Keeton, Austin, TX, 78712, USA.

Visual input to primary visual cortex (V1) depends on highly adaptive filtering in the retina. In turn, isolation of V1 computations requires experimental control of retinal adaptation to infer its spatio-temporal-chromatic output. Here, we measure the balance of input to mouse V1, in the anesthetized setup, from the three main photoreceptor opsins-M-opsin, S-opsin, and rhodopsin-as a function of two stimulus dimensions. Read More

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Spatio-temporal mRNA tracking in the early zebrafish embryo.

Nat Commun 2021 06 7;12(1):3358. Epub 2021 Jun 7.

Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine, Berlin, Germany.

Early stages of embryogenesis depend on subcellular localization and transport of maternal mRNA. However, systematic analysis of these processes is hindered by a lack of spatio-temporal information in single-cell RNA sequencing. Here, we combine spatially-resolved transcriptomics and single-cell RNA labeling to perform a spatio-temporal analysis of the transcriptome during early zebrafish development. Read More

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Selection on heritable social network positions is context-dependent in Drosophila melanogaster.

Nat Commun 2021 06 7;12(1):3357. Epub 2021 Jun 7.

Department of Biosciences, Rice University, Houston, TX, USA.

Social group structure is highly variable and can be important for nearly every aspect of behavior and its fitness consequences. Group structure can be modeled using social network analysis, but we know little about the evolutionary factors shaping and maintaining variation in how individuals are embedded within their networks (i.e. Read More

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Spatio-temporal epidemiology of the tuberculosis incidence rate in Iran 2008 to 2018.

BMC Public Health 2021 Jun 7;21(1):1093. Epub 2021 Jun 7.

Department of Geography and Urban Planning, Faculty of Social Sciences, University of Mohaghegh Ardabili, Ardabil, Iran.

Background: Effective reduction of tuberculosis (TB) requires information on the distribution of TB incidence rate across time and location. This study aims to identify the spatio-temporal pattern of TB incidence rate in Iran between 2008 and 2018.

Methods: This cross-sectional study was conducted on aggregated TB data (50,500 patients) at the provincial level provided by the Ministry of Health in Iran between 2008 and 2018. Read More

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The Intestinal Epithelium - Fluid Fate and Rigid Structure From Crypt Bottom to Villus Tip.

Front Cell Dev Biol 2021 20;9:661931. Epub 2021 May 20.

Institute of Molecular Health Sciences, ETH Zurich, Zurich, Switzerland.

The single-layered, simple epithelium of the gastro-intestinal tract controls nutrient uptake, coordinates our metabolism and shields us from pathogens. Despite its seemingly simple architecture, the intestinal lining consists of highly distinct cell populations that are continuously renewed by the same stem cell population. The need to maintain balanced diversity of cell types in an unceasingly regenerating tissue demands intricate mechanisms of spatial or temporal cell fate control. Read More

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Spatio-temporal assessment, sources and health risks of water pollutants at trace levels in public supply river using multivariate statistical techniques.

Chemosphere 2021 May 27;282:130942. Epub 2021 May 27.

Federal University of Bahia, Institute of Chemistry, 40170-290, SSA, BA, Brazil. Electronic address:

The Joanes River is located in the northeast of Brazil, crosses the Camaçari Petrochemical Complex, the largest integrated industrial complex in the Southern Hemisphere, which has over 90 companies in the chemical and petrochemical industry. The present study aims to evaluate spatial distribution, seasonal variation and identify possible sources of trace metal contamination in surface water samples of the Joanes River. Samples were collected in the dry (December 2018) and rainy (August 2019) seasons. Read More

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A brain-inspired computational model for spatio-temporal information processing.

Neural Netw 2021 May 16;143:74-87. Epub 2021 May 16.

Center for Neurointelligence, School of Medicine, Chongqing University, No.174 Shazhengjie, Shapingba, Chongqing 400044, PR China; AI Research Center, Peng Cheng Laboratory, No.2, Xingke First Street, Nanshan District, Shenzhen 518005, PR China. Electronic address:

Spatio-temporal information processing is fundamental in both brain functions and AI applications. Current strategies for spatio-temporal pattern recognition usually involve explicit feature extraction followed by feature aggregation, which requires a large amount of labeled data. In the present study, motivated by the subcortical visual pathway and early stages of the auditory pathway for motion and sound processing, we propose a novel brain-inspired computational model for generic spatio-temporal pattern recognition. Read More

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Estimation of PQ distance dispersion for atrial fibrillation detection.

Comput Methods Programs Biomed 2021 May 18;208:106167. Epub 2021 May 18.

Faculty of health sciences, Universidad Simón Bolívar Carrera 54 # 64 - 222, Barranquilla,1086, Colombia, USA.

Background And Objective: Atrial fibrillation (AF) is the most common cardiac arrhythmia in the world. It is associated with significantly increased morbidity and mortality. Diagnosis of the disease can be based on the analysis of the electrical atrial activity, on quantification of the heart rate irregularity or on a mixture of the both approaches. Read More

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Coastal reservoirs as a source of nitrous oxide: Spatio-temporal patterns and assessment strategy.

Sci Total Environ 2021 May 21;790:147878. Epub 2021 May 21.

School of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China.

Coastal reservoirs are widely regarded as a viable solution to the water scarcity problem faced by coastal cities with growing populations. As a result of the accumulation of anthropogenic wastes and the alteration of hydroecological processes, these reservoirs may also become the emission hotspots of nitrous oxide (NO). Hitherto, accurate global assessment of NO emission suffers from the scarcity and low spatio-temporal resolution of field data, especially from small coastal reservoirs with high spatial heterogeneity and multiple water sources. Read More

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Exploring the effect of urban traffic development on PM pollution in emerging economies: fresh evidence from China.

Yajie Liu Feng Dong

Environ Sci Pollut Res Int 2021 Jun 4. Epub 2021 Jun 4.

School of Economics and Management, China University of Mining and Technology, Xuzhou, 221116, People's Republic of China.

Urban traffic congestion and haze pollution have become the main obstacles to the development of most cities in emerging economies. It is not clear how urban traffic development processes impact on PM concentration for the cities of emerging economies. Motivated by exploring the relationship between urban traffic development and PM pollution, 30 provinces in China (a representative emerging economy) from 2007 to 2016 were taken as examples, and threshold regression model and geographically temporally weighted regression model were used to explore the nonlinear relationship and their spatio-temporal heterogeneity. Read More

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A spatio-temporal analysis of dengue spread in a Brazilian dry climate region.

Sci Rep 2021 Jun 4;11(1):11892. Epub 2021 Jun 4.

Centro Universitário Senai Cimatec - Salvador, Bahia, Brazil.

We investigated the relation between the spread, time scale, and spatial arrangement of dengue in Bahia, a Brazilian dry climate region, for the period 2000 to 2009. The degree of cross-correlation is calculated for 15 economic regions. We propose a multiscale statistical analysis to datasets of dengue cases in order to verify the effect of infection dispersal on the economic regions from the metropolitan region of Salvador. Read More

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Fifty-year dynamics of the Lena River islands (Russia): Spatio-temporal pattern of large periglacial anabranching river and influence of climate change.

Sci Total Environ 2021 Aug 18;783:147020. Epub 2021 Apr 18.

Université de Corse, CNRS, UMR6240 LISA, France.

The Lena, a large river that drains the northern coldest region of the Northern Hemisphere, is deeply influenced by the continuous permafrost and degradation of the frozen ground has been shown to be the main cause of the marked increase in water discharge. The first objective of this study conducted on the middle Lena was to analyze the island dynamics for the last 50 years (1967 to 2017). Several morphological parameters were surveyed using a GIS on seven series of aerial photographs and satellite images of a 100 km-long reach: island size, eroded and deposited areas, position and morphology of the islands. Read More

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An improved microelectrode method reveals significant emission of nitrous oxide from the rhizosphere of a long-term fertilized soil in the North China Plain.

Sci Total Environ 2021 Aug 18;783:147011. Epub 2021 Apr 18.

Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang 050021, China.

Microsensors are able to accurately quantify nitrous oxide (NO) emissions in microenvironments at high spatio-temporal resolution; yet, limited studies have been conducted on agricultural soils due to the inability to obtain electrical signal under conditions of low soil moisture. This study improved the calibration of a microelectrode for measuring NO emissions from agricultural soil. The microelectrode was applied to evaluate the effect of long-term fertilization with mineral fertilizer (NPK), complemented with pig manure (MNPK), straw (SNPK), or without fertilizer (CK), all with and without urea addition, on NO emissions from the soil, with explicit separation of the rhizosphere and the bulk soil compartments. Read More

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