9,238 results match your criteria varied temporal

An AIS-based emission inventory and the impact on air quality in Tianjin port based on localized emission factors.

Sci Total Environ 2021 Apr 6;783:146869. Epub 2021 Apr 6.

Tianjin Key Laboratory of Urban Transport Emission Research & State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China. Electronic address:

Ship pollution has become a hot global issue. This study established a basic information database of Tianjin Port ship emissions and used it to screen representative ship types and perform real-world ship measurements by a portable emission measurement system (PEMS), which generated localized emission factors. The results show that the localized emission factors are significantly higher than those recommended in recommended in Chinese guidelines, which will lead to lower calculation results of the previous inventory. Read More

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A multi-level spatio-temporal analysis on prostate cancer outcomes.

Cancer Epidemiol 2021 Apr 13;72:101939. Epub 2021 Apr 13.

Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia.

Background: Geographic and temporal variation in positive surgical margins (PSM) for prostate cancer after radical prostatectomy (RP) has been observed. However, it is unclear how much of this variation could be attributed to patient, surgeon, institution, or socioeconomic-related factors and the impact of PSM on death among localized prostate cancer patients.

Methods: This study aimed to assess the independent and relative contribution of the patient, surgeon, institution and area-level risk factors on geographic and temporal variation of PSM and evaluate the impact of PSM on five-year all-cause and prostate cancer-specific mortality among localized prostate cancer patients. Read More

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PSMA Expression in Glioblastoma as a Basis for Theranostic Approaches: A Retrospective, Correlational Panel Study Including Immunohistochemistry, Clinical Parameters and PET Imaging.

Front Oncol 2021 30;11:646387. Epub 2021 Mar 30.

Department of Neurosurgery, University Hospital, LMU Munich, Munich, Germany.

Aim: The aim of the current study was to enlighten the evolution of prostate-specific membrane antigen (PSMA) expression in glioblastoma between initial diagnosis and recurrence in order to provide preliminary insight for further clinical investigations into innovative PSMA-directed treatment concepts in neuro-oncology.

Methods: Patients who underwent resection for de-novo glioblastoma (GBM) and had a re-resection in case of a recurrent tumor following radiochemotherapy and subsequent chemotherapy were included (n = 16). Histological and immunohistochemical stainings were performed at initial diagnosis and at recurrence (n = 96 tissue specimens). Read More

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Subnational estimates of factors associated with under-five mortality in Kenya: a spatio-temporal analysis, 1993-2014.

BMJ Glob Health 2021 Apr;6(4)

Population Health Unit, KEMRI-Wellcome Trust Research Programme, Nairobi, Kenya.

Background: To improve child survival, it is necessary to describe and understand the spatial and temporal variation of factors associated with child survival beyond national aggregates, anchored at decentralised health planning units. Therefore, we aimed to provide subnational estimates of factors associated with child survival while elucidating areas of progress, stagnation and decline in Kenya.

Methods: Twenty household surveys and three population censuses conducted since 1989 were assembled and spatially aligned to 47 subnational Kenyan county boundaries. Read More

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Trends in Racial and Ethnic Disparities in COVID-19 Hospitalizations, by Region - United States, March-December 2020.

MMWR Morb Mortal Wkly Rep 2021 Apr 16;70(15):560-565. Epub 2021 Apr 16.

CDC COVID-19 Response Team.

Persons from racial and ethnic minority groups are disproportionately affected by COVID-19, including experiencing increased risk for infection (1), hospitalization (2,3), and death (4,5). Using administrative discharge data, CDC assessed monthly trends in the proportion of hospitalized patients with COVID-19 among racial and ethnic groups in the United States during March-December 2020 by U.S. Read More

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Tract metastasis in patients with long-term pleural catheter-computed tomography diagnosis and longitudinal assessment.

Eur Radiol 2021 Apr 15. Epub 2021 Apr 15.

Department of Internal Medicine, Interventional Respirology Service, The Ottawa Hospital Research Institute, Ottawa, Canada.

Objectives: Long-term indwelling pleural catheters (IPC), used for the management of malignant pleural mesothelioma (MPM), may lead to catheter tract metastasis (CTM). While computed tomography (CT) is valuable for diagnosis, no studies have assessed CT manifestations of CTM. Our goal is to describe the incidence, CT appearances, and temporal evolution of CTM in MPM. Read More

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Polyphony of domestic dog whines and vocal cues to body size.

Curr Zool 2021 Apr 13;67(2):165-176. Epub 2020 Aug 13.

Department of Behaviour and Behavioural Ecology, A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 119071, Russia.

In domestic dogs , vocal traits have been investigated for barks and growls, and the relationship between individual body size and vocal traits investigated for growls, with less corresponding information for whines. In this study, we examined the frequency and temporal traits of whines of 20 adult companion dogs (9 males, 11 females), ranging in body mass from 3.5 to 70. Read More

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Evaluating the association between extreme heat and mortality in urban Southwestern Ontario using different temperature data sources.

Sci Rep 2021 Apr 14;11(1):8153. Epub 2021 Apr 14.

ICES, Toronto, ON, Canada.

Urban areas have complex thermal distribution. We examined the association between extreme temperature and mortality in urban Ontario, using two temperature data sources: high-resolution and weather station data. We used distributed lag non-linear Poisson models to examine census division-specific temperature-mortality associations between May and September 2005-2012. Read More

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Phonemic restoration of interrupted locally time-reversed speech : Effects of segment duration and noise levels.

Atten Percept Psychophys 2021 Apr 13. Epub 2021 Apr 13.

School of Audiology and Speech Sciences, The University of British Columbia, 2177 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada.

Intelligibility of temporally degraded speech was investigated with locally time-reversed speech (LTR) and its interrupted version (ILTR). Control stimuli comprising interrupted speech (I) were also included. Speech stimuli consisted of 200 Japanese meaningful sentences. Read More

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Investigating the determinants of vaccine hesitancy within undergraduate students' social sphere.

Z Gesundh Wiss 2021 Apr 9:1-9. Epub 2021 Apr 9.

School of Biological Sciences, University of Portsmouth, King Henry Building, King Henry 1st Street, Portsmouth, PO1 2DY UK.

Aims: Vaccine hesitancy is widely recognised as one of the most serious threats to current global health. While the causes underlying vaccine hesitancy have been extensively described and several mitigation strategies trialled amongst current and prospective parents, there is a relative scarcity of research investigating its extent and causative factors amongst university students, a critical demographic due to its temporal proximity to the average child-rearing age. The present study sought to address this literature gap by elucidating the social and demographic factors that might underpin vaccine hesitancy in university students. Read More

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Temporal changes in the chest based on findings from imaging in severe patients with novel coronavirus pneumonia.

Mol Med Rep 2021 Jun 13;23(6). Epub 2021 Apr 13.

Department of Respiratory and Critical Care Medicine, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei 441001, P.R. China.

The aim of the present study was to observe the temporal changes in the chest based on findings from imaging in severe patients with novel coronavirus pneumonia. A total of 33 severe confirmed cases (20 male patients and 13 female patients) were enrolled in the present study between January 31, 2020 and March 10, 2020. Chest imaging findings and clinical data were collected and analyzed. Read More

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Role of individual dispersal in genetic resilience in fluctuating populations of the gray-sided vole .

Ecol Evol 2021 Apr 21;11(7):3407-3421. Epub 2021 Feb 21.

Hokkaido Institute of Public Health Sapporo Japan.

Population densities of the gray-sided vole fluctuate greatly within and across years in Japan. Here, to investigate the role of individual dispersal in maintaining population genetic diversity, we examined how genetic diversity varied during fluctuations in density by analyzing eight microsatellite loci in voles sampled three times per year for 5 years, using two fixed trapping grids (approximately 0.5 ha each). Read More

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Characteristics of Chemical Speciation in PM in Six Representative Regions in China.

Adv Atmos Sci 2021 Apr 7:1-14. Epub 2021 Apr 7.

Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, Shanghai, 200241 China.

A better knowledge of aerosol properties is of great significance for elucidating the complex mechanisms behind frequently occurring haze pollution events. In this study, we examine the temporal and spatial variations in both PM and its major chemical constituents using three-year field measurements that were collected in six representative regions in China between 2012 and 2014. Our results show that both PM and its chemical compositions varied significantly in space and time, with high PM loadings mainly observed in the winter. Read More

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Visualization of Different Types of Cochlear Implants in Postoperative Cone-Beam CT Imaging.

Acad Radiol 2021 Apr 8. Epub 2021 Apr 8.

Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt 60590, Germany.

Rationale And Objectives: To evaluate cone-beam computed-tomography (CBCT) images of the temporal bone for radiological delineation, metal artifacts, and accuracy for localization of six different electrode arrays after cochlear device implantation.

Materials And Methods: This retrospective study included 116 patients who underwent CBCT (120kV, 7.1mA) within 24 hours after cochlear device implantation. Read More

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Unsupervised machine learning can delineate central sulcus by using the spatiotemporal characteristic of somatosensory evoked potentials.

J Neural Eng 2021 Apr 9. Epub 2021 Apr 9.

Biomedical Engineering Department, University of Houston, 4849 Calhoun Rd. HBS-Building 592, Houston, Texas, 77204-5060, UNITED STATES.

Objective: Somatosensory evoked potentials (SSEPs) recorded with electrocorticography (ECoG) for central sulcus (CS) identification is a widely accepted procedure in routine intraoperative neurophysiological monitoring. Clinical practices test the short-latency SSEPs for the phase reversal over strip electrodes. However, assessments based on waveform morphology are susceptible to variations in interpretations due to the hand area's localized nature and usually require multiple electrode placements or electrode relocation. Read More

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Evolution of Micron-Spaced Patterns within Precipitating Patterns of Synthesized Silver Nanoparticles in a Nanodot-Embedded PVA/PVP Film.

Langmuir 2021 Apr 8. Epub 2021 Apr 8.

Department of Basic Sciences & Humanities, Rajiv Gandhi Institute of Petroleum Technology, Jais, Amethi 229304, Uttar Pradesh, India.

Periodic pattern formation beyond conventional precipitation reactions of electrolytes is of greater importance for gaining insights into the driving forces behind spontaneous spatiotemporal pattern formation in living matter. The Liesegang phenomenon is considered to be one of the important models for understanding well-defined periodic patterns. In this study, we have used biomolecule-derived photoluminescent carbon nanodots as reducing agents that were embedded in thin polymer films. Read More

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Identifying changing interspecific associations along gradients at multiple scales using wavelet correlation networks.

Ecology 2021 Apr 8:e03360. Epub 2021 Apr 8.

State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.

Identifying interspecific associations is very important for understanding the community assembly process. However, most methods provide only an average association and assume that the association strength does not vary along the environmental gradient or with time. The scale effects are generally ignored. Read More

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Simultaneous multi-slice accelerated 4D-MRI for radiotherapy guidance.

Phys Med Biol 2021 Apr 7. Epub 2021 Apr 7.

Department of Radiotherapy, UMC Utrecht, Heidelberglaan 100, Utrecht, 3584 CX, NETHERLANDS.

4D-MRI is becoming increasingly important for daily guidance of thoracic and abdominal radiotherapy. This study exploits the simultaneous multi-slice (SMS) technique to accelerate the acquisition of a balanced turbo field echo (bTFE) and a turbo spin echo (TSE) coronal 4D-MRI sequence performed on 1.5 T MRI scanners. Read More

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Daily light exposure, sleep-wake cycle and attention in adolescents from different urban contexts.

Sleep Med 2021 Mar 16;81:410-417. Epub 2021 Mar 16.

Laboratório de Cronobiologia e Comportamento, Departamento de Fisiologia e Comportamento, Universidade Federal do Rio Grande do Norte, Brazil. Electronic address:

Objective: to compare daily light exposure, activity-rest rhythm, sleep-wake cycle (SWC) and attention in Brazilian students living in different levels of urbanization.

Methods: 115 adolescents (74 girls), aged 14-18 years (mean 15.5 ± 0. Read More

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A coherent approach of Water Quality Indices and Multivariate Statistical Models to estimate the water quality and pollution source apportionment of River Ganga System in Himalayan region, Uttarakhand, India.

Environ Sci Pollut Res Int 2021 Apr 6. Epub 2021 Apr 6.

Pollution Control Research Institute, Haridwar, India.

River Ganga covers around 26% of India's land area and sustains diverse ecosystems in this overly populated area. The globally accepted coherent approach of water quality indices (WQIs) and multivariate statistical models (principal component analysis (PCA) and cluster analysis (CA)) were applied on the dataset to evaluate the spatial-temporal variation and pollution source identification and apportionment. Twenty-two hydro-chemical parameters were analyzed by collecting the samples from 20 different vertically elevated monitoring locations for different seasons. Read More

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xCO2 temporal variability above Brazilian agroecosystems: A remote sensing approach.

J Environ Manage 2021 Apr 7;288:112433. Epub 2021 Apr 7.

School of Agricultural and Veterinary Studies, São Paulo State University (FCAV-UNESP), Via de Acesso Prof. Paulo Donato Castellane S/n, 14884-900, Jaboticabal, São Paulo, Brazil. Electronic address:

Agriculture and soil management practices are closely related to CO emissions in crop fields. These practices directly interfere on the carbon dynamics between the land and atmosphere. In this study, we investigated the temporal variability of the column-averaged dry-air mole fraction of atmospheric CO (xCO), solar-induced chlorophyll fluorescence (SIF), and the normalized difference vegetation index (NDVI) in areas with the main agroecosystems in southern-central Brazil as a way to understand if and how crops cycle and agricultural management could be associated with the temporal variability of NDVI, SIF and xCO. Read More

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Trends in Geographic and Temporal Distribution of US Children With Multisystem Inflammatory Syndrome During the COVID-19 Pandemic.

JAMA Pediatr 2021 Apr 6. Epub 2021 Apr 6.

US Centers for Disease Control and Prevention COVID-19 Response Team, Atlanta, Georgia.

Importance: Multiple inflammatory syndrome in children (MIS-C) occurs in association with the COVID-19 pandemic.

Objective: To describe the clinical characteristics and geographic and temporal distribution of the largest cohort of patients with MIS-C in the United States to date.

Design, Setting, And Participants: Cross-sectional analysis was conducted on clinical and laboratory data collected from patients with MIS-C. Read More

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Comparing plasma conditions in short-pulse-heated foils via fine-structure x-ray emission.

Rev Sci Instrum 2021 Mar;92(3):033525

Electrical and Computer Engineering Department, Colorado State University, Fort Collins, Colorado 80523, USA.

Fine-structure x-ray spectra have been measured from foils with embedded tracer layers at two laser facilities. A suite of layered foils with thin Ti tracers under varied tamper layers was studied at both the Titan and the ALEPH 400 nm laser facilities, where Ti Heα emission was recorded using a high-resolution Bragg crystal spectrometer. Several indicators of plasma parameters are examined in the spectra, including temperature- and density-dependent line ratios and line broadening from Stark and opacity effects. Read More

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The interplay between airway epithelium and the immune system - A primer for the respiratory clinician.

Paediatr Respir Rev 2021 Mar 18. Epub 2021 Mar 18.

Division of Pediatric Pulmonary and Sleep Medicine. Children's National Hospital, George Washington University, Washington, DC, USA. Electronic address:

The respiratory epithelium is one of the primary interfaces between the body's immune system and the external environment. This review discusses the innate and adaptive immunomodulatory effects of the respiratory epithelium, highlighting the physiologic immune responses associated with health and the disease-causing sequelae when these physiologic responses go awry. Airway macrophages, dendritic cells, and innate lymphoid cells are discussed as orchestrators of physiological and pathological innate immune responses and T cells, B cells, mast cells, and granulocytes (eosinophils and neutrophils) as orchestrators of physiologic and pathologic adaptive immune responses. Read More

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Spatio-Temporal Patterns of Dengue Incidence in Medan City, North Sumatera, Indonesia.

Trop Med Infect Dis 2021 Mar 5;6(1). Epub 2021 Mar 5.

Department of Global Health, Research School of Population Health, The Australian National University, Acton, Canberra, ACT 2601, Australia.

Dengue has been a perennial public health problem in Medan city, North Sumatera, despite the widespread implementation of dengue control. Understanding the spatial and temporal pattern of dengue is critical for effective implementation of dengue control strategies. This study aimed to characterize the epidemiology and spatio-temporal patterns of dengue in Medan City, Indonesia. Read More

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Spatio-Temporal Distribution and Fixed-Precision Sampling Plan of (Thysanoptera: Thripidae) in Florida Blueberry.

Insects 2021 Mar 18;12(3). Epub 2021 Mar 18.

Department of Entomology and Nematology, University of Florida, Gainesville, FL 32611, USA.

Hood is an invasive and foliar pest of Florida blueberry that reduces plant growth by feeding on new leaf growth. A sampling plan is needed to make informed control decisions for in blueberry. Fourteen blueberry fields in central Florida were surveyed in 2017 and 2018 after summer pruning to determine the spatial and temporal distribution of and to develop a fixed-precision sampling plan. Read More

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Altered peri-seizure EEG microstate dynamics in patients with absence epilepsy.

Seizure 2021 Mar 25;88:15-21. Epub 2021 Mar 25.

Department of Neurology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, China; Laboratory of Neurological Diseases and Brain Function, Luzhou, 646000, China. Electronic address:

Objective: To investigate whether the parameters of EEG microstates changed before and after an absence seizure episode.

Methods: AE patients with a current high frequency of seizures were included (n=21). Each included subject underwent a two-hour and 19-channel video EEG examination. Read More

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Personality traits, sex and food abundance shape space use in an arboreal mammal.

Oecologia 2021 Apr 1. Epub 2021 Apr 1.

Department of Veterinary Medicine, Università degli Studi di Milano, Milan, Italy.

Animal space use is affected by spatio-temporal variation in food availability and/or population density and varies among individuals. This inter-individual variation in spacing behaviour can be further influenced by sex, body condition, social dominance, and by the animal's personality. We used capture-mark-recapture and radio-tracking to examine the relationship between space use and personality in Eurasian red squirrels (Sciurus vulgaris) in three conifer forests in the Italian Alps. Read More

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Acute Symptoms of Mild to Moderate COVID-19 Are Highly Heterogeneous Across Individuals and Over Time.

Open Forum Infect Dis 2021 Mar 1;8(3):ofab090. Epub 2021 Mar 1.

Department of Internal Medicine, Division of Infectious Diseases, WUSM, St Louis, Missouri, USA.

Background: The symptoms of coronavirus disease 2019 (COVID-19) appear to be heterogenous, and the typical course of these symptoms is unknown. Our objectives were to characterize the common trajectories of COVID-19 symptoms and to assess how symptom course predicts other symptom changes as well as clinical deterioration.

Methods: One hundred sixty-two participants with acute COVID-19 responded to surveys up to 31 times for up to 17 days. Read More

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Collimating micro-lens fiber array for noncontact near-infrared diffuse correlation tomography.

Biomed Opt Express 2021 Mar 17;12(3):1467-1481. Epub 2021 Feb 17.

Shanxi Provincial Key Laboratory for Biomedical Imaging and Big Data, North University of China, No. 3 Xueyuan Road, Taiyuan 030051, China.

Near-infrared diffuse correlation spectroscopy/tomography (DCS/DCT) has recently emerged as a noninvasive measurement/imaging technology for tissue blood flow. In DCT studies, the high-dense collection of light temporal autocorrelation curves (()) via fiber array are critical for image reconstruction of blood flow. Previously, the camera-based fiber array limits the field of view (FOV), precluding its applications on large-size human tissues. Read More

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