163,252 results match your criteria Estimation of Fetal Weight


Methane emissions from anaerobic sludge digesters in Mexico: On-site determination vs. IPCC Tier 1 method.

Sci Total Environ 2018 Nov 26;656:468-474. Epub 2018 Nov 26.

Instituto de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, 04510 México D.F., México. Electronic address:

Wastewater treatment is an important source of methane (CH) emissions. In most large-size aerobic treatment plants, the excess sludge is digested in anaerobic reactors (AD), with the concomitant CH emissions. The guidelines of the Intergovernmental Panel on Climate Change (IPCC) have been adopted worldwide for quantifying the national emission inventories, which include wastewater treatment plants (WWTP) as a key category. Read More

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November 2018
1 Read

Performance of GPS units for deployment on semiaquatic animals.

PLoS One 2018 6;13(12):e0207938. Epub 2018 Dec 6.

Faculty of Technology, Natural Sciences, and Maritime Sciences, Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, Bø i Telemark, Norway.

Global Positioning System (GPS) technology is widely used in wildlife research to study animal movement and habitat use. In order to evaluate the quality and reliability of GPS data, the factors influencing the performance of these devices must be known, especially for semiaquatic species, because terrestrial and aquatic habitat might affect GPS performance differently. We evaluated the location error and fix success rate of three GPS receiver models in stationary tests and on a semi-aquatic mammal, the Eurasian beaver (Castor fiber). Read More

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December 2018

Residual Normality Assumption and the Estimation of Multiple Membership Random Effects Models.

Multivariate Behav Res 2018 Dec 6:1-16. Epub 2018 Dec 6.

a Department of Educational Policy Studies , Georgia State University.

While conventional hierarchical linear modeling is applicable to purely hierarchical data, a multiple membership random effects model (MMrem) is appropriate for nonpurely nested data wherein some lower-level units manifest mobility across higher-level units. Although a few recent studies have investigated the influence of cluster-level residual nonnormality on hierarchical linear modeling estimation for purely hierarchical data, no research has examined the statistical performance of an MMrem given residual non-normality. The purpose of the present study was to extend prior research on the influence of residual non-normality from purely nested data structures to multiple membership data structures. Read More

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December 2018
1 Read

The inner ear proteome of fish.

FEBS J 2018 Dec 6. Epub 2018 Dec 6.

The Florey Institute of Neuroscience and Mental Health, The University of Melbourne, Parkville Campus, Victoria, Australia, 3010.

The mechanisms that underpin the formation, growth and composition of otoliths, the biomineralized stones in the inner ear of fish, are largely unknown, as only a few fish inner ear proteins have been reported. Using a partial transcriptome for the inner ear of black bream (Acanthopagrus butcheri), in conjunction with proteomic data, we discovered hundreds of previously unknown proteins in the otolith. This allowed us to develop hypotheses to explain the mechanisms of inorganic material supply and daily formation of growth bands. Read More

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December 2018

Accurate and efficient estimation of small p-values with the cross-entropy method: applications in genomic data analysis.

Bioinformatics 2018 Dec 6. Epub 2018 Dec 6.

Department of Biostatistics, University of Michigan, Ann Arbor, Michigan, USA.

Motivation: Small p-values are often required to be accurately estimated in large-scale genomic studies for the adjustment of multiple hypothesis tests and the ranking of genomic features based on their statistical significance. For those complicated test statistics whose cumulative distribution functions are analytically intractable, existing methods usually do not work well with small p-values due to lack of accuracy or computational restrictions. We propose a general approach for accurately and efficiently estimating small p-values for a broad range of complicated test statistics based on the principle of the cross-entropy method and Markov chain Monte Carlo sampling techniques. Read More

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December 2018
1 Read

Indirect Estimation of Race/Ethnicity for Survey Respondents Who Do Not Report Race/Ethnicity.

Med Care 2018 Dec 4. Epub 2018 Dec 4.

RAND Corporation, Santa Monica, CA.

Background: Researchers are increasingly interested in measuring race/ethnicity, but some survey respondents skip race/ethnicity items.

Objectives: The main objectives of this study were to investigate the extent to which racial/ethnic groups differ in skipping race/ethnicity survey items, the degree to which this reflects reluctance to disclose race/ethnicity, and the utility of imputing missing race/ethnicity.

Research Design: We applied a previously developed method for imputing race/ethnicity from administrative data (Medicare Bayesian Improved Surname and Geocoding 2. Read More

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December 2018
1 Read

Therapeutic drug monitoring of second-generation antipsychotics for the estimation of early drug effect in first-episode psychosis.

Ther Drug Monit 2018 Dec 4. Epub 2018 Dec 4.

Collaborative Antwerp Psychiatric Research Institute (CAPRI), Faculty of Medical and Health Sciences, University of Antwerp, Belgium.

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December 2018

Synthesis of urban CO emission estimates from multiple methods from the Indianapolis Flux Project (INFLUX).

Environ Sci Technol 2018 Dec 6. Epub 2018 Dec 6.

Urban areas contribute approximately three-quarters of fossil fuel derived CO emissions, and many cities have enacted emissions mitigation plans. Evaluation of the effectiveness of mitigation efforts will require measurement of both the emission rate and its change over space and time. The relative performance of different emission estimation methods is a critical requirement to support mitigation efforts. Read More

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December 2018
5 Reads

Bio-statistical options for Quantitative diet analysis.

J Agric Food Chem 2018 Dec 6. Epub 2018 Dec 6.

Sufficient statistics knowledge is crucial for right scheming of a research plan. The elucidations of results are interpretive only if appropriate statistical methods are applied. Statistical strategies are a particular approach to demonstrate complicated information in broad and explicable conclusions. Read More

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December 2018

Force analysis of shoulder joint muscles in the early phase of brain stroke.

Acta Bioeng Biomech 2018 ;20(4):107-113

Department of Physical Medicine, Medical University of Lodz, Łódź, Poland.

Purpose: Upper limb impairment in the early phase of brain stroke is one of the key problems in rehabilitation. An estimation of muscle force can be a helpful factor for functional improvement after a stroke. The primary goals of this study were to determine the muscles with the lowest force in the affected (A) and non-affected (non-A) upper limb. Read More

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January 2018
1 Read

Variable sialic acid content in milk of Indian cattle and buffalo across different stages of lactation.

J Dairy Res 2018 Dec 6:1-4. Epub 2018 Dec 6.

ICAR- National Bureau of Animal Genetic Resources,Karnal 132 001, Haryana,India.

The aim of this Research Communication was to contribute to the knowledge of milk sialic acid concentration of bovines with specific focus on India. Sialic acids (SA) are important constituents of mammalian milks. Buffaloes are the main milk producing species in India, therefore, our research focused on both cow and buffalo. Read More

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December 2018

Shift work, sleep disturbances and social jetlag in healthcare workers.

J Sleep Res 2018 Dec 5:e12802. Epub 2018 Dec 5.

Centre for Nutrition, Prevention and Health Services, National Institute for Public Health and the Environment, Bilthoven, The Netherlands.

The aim of this study was to compare chronotype- and age-dependent sleep disturbances and social jetlag between rotating shift workers and non-shift workers, and between different types of shifts. In the Klokwerk+ cohort study, we included 120 rotating shift workers and 74 non-shift workers who were recruited from six Dutch hospitals. Participants wore Actigraph GT3X accelerometers for 24 hr for 7 days. Read More

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December 2018

Magnetic resonance imaging of the time course of hyperpolarized Xe gas exchange in the human lungs and heart.

Eur Radiol 2018 Dec 5. Epub 2018 Dec 5.

Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, UK.

Purpose: To perform magnetic resonance imaging (MRI), human lung imaging, and quantification of the gas-transfer dynamics of hyperpolarized xenon-129 (HPX) from the alveoli into the blood plasma.

Materials And Methods: HPX MRI with iterative decomposition of water and fat with echo asymmetry and least-square estimation (IDEAL) approach were used with multi-interleaved spiral k-space sampling to obtain HPX gas and dissolved phase images. IDEAL time-series images were then obtained from ten subjects including six normal subjects and four patients with pulmonary emphysema to test the feasibility of the proposed technique for capturing xenon-129 gas-transfer dynamics (XGTD). Read More

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December 2018
1 Read

Efficient Clustering-based Noise Covariance Estimation for Maximum Noise Fraction.

Natl Conf Comput Vis Pattern Recognit Image Process Graph 2018 26;841:232-244. Epub 2018 Apr 26.

University of Texas at Austin, Austin TX 78705, USA.

Most hyperspectral images (HSI) have important spectral features in specific combination of wave numbers or channels. Noise in these specific channels or bands can easily overwhelm these relevant spectral features. Maximum Noise Fraction (MNF) by Green . Read More

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Assessment of survival in patients with idiopathic pulmonary fibrosis using quantitative HRCT indexes.

Multidiscip Respir Med 2018 1;13:43. Epub 2018 Dec 1.

1Regional Referral Centre for Rare Lung Diseases, A.O.U. Policlinico-Vittorio Emanuele, Department of Clinical and Experimental Medicine, University of Catania, via Santa Sofia 78, Catania, Italy.

Background: The assessment of Idiopathic Pulmonary Fibrosis (IPF) using HRCT requires great experience and is limited by a significant inter-observer variability, even between trained radiologists. The evaluation of HRCT through automated quantitative analysis may hopefully solve this problem. The accuracy of CT-histogram derived indexes in the assessment of survival in IPF patients has been poorly studied. Read More

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December 2018

A discontinuous Galerkin model for fluorescence loss in photobleaching of intracellular polyglutamine protein aggregates.

BMC Biophys 2018 29;11. Epub 2018 Nov 29.

Department of Biochemistry and Molecular Biology, Campusvej 55, Odense M, 5230 Denmark.

Background: Intracellular phase separation and aggregation of proteins with extended poly-glutamine (polyQ) stretches are hallmarks of various age-associated neurodegenerative diseases. Progress in our understanding of such processes heavily relies on quantitative fluorescence imaging of suitably tagged proteins. Fluorescence loss in photobleaching (FLIP) is particularly well-suited to study the dynamics of protein aggregation in cellular models of Chorea Huntington and other polyQ diseases, as FLIP gives access to the full spatio-temporal profile of intensity changes in the cell geometry. Read More

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November 2018
2 Reads

Measuring agreement among experts in classifying camera images of similar species.

Ecol Evol 2018 Nov 30;8(22):11009-11021. Epub 2018 Oct 30.

Department of Biology University of British Columbia Okanagan Kelowna British Columbia Canada.

Camera trapping and solicitation of wildlife images through citizen science have become common tools in ecological research. Such studies collect many wildlife images for which correct species classification is crucial; even low misclassification rates can result in erroneous estimation of the geographic range or habitat use of a species, potentially hindering conservation or management efforts. However, some species are difficult to tell apart, making species classification challenging-but the literature on classification agreement rates among experts remains sparse. Read More

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November 2018

Accounting for observation processes across multiple levels of uncertainty improves inference of species distributions and guides adaptive sampling of environmental DNA.

Ecol Evol 2018 Nov 23;8(22):10879-10892. Epub 2018 Oct 23.

United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center Fort Collins Colorado.

Understanding factors that influence observation processes is critical for accurate assessment of underlying ecological processes. When indirect methods of detection, such as environmental DNA, are used to determine species presence, additional levels of uncertainty from observation processes need to be accounted for. We conducted a field trial to evaluate observation processes of a terrestrial invasive species (wild pigs- ) from DNA in water bodies. Read More

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November 2018

The Association of Baseline Serum Tumour Markers with Outcome of Patients with Metastatic Colorectal Cancer Treated with Anti-EGFR Monoclonal Antibodies in the First Line.

J Cancer 2018 20;9(22):4255-4262. Epub 2018 Oct 20.

Department of Oncology and Radiotherapy, Medical School and University Hospital in Pilsen, Charles University, Czech Republic.

The measurement of serum tumour markers is a simple and non-invasive method for assessing the response to systemic therapies in metastatic colorectal cancer (mCRC) and estimation of prognosis. The aim of our retrospective study was to evaluate the association of baseline serum levels of carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA 19-9), thymidine kinase (TK) and tissue polypeptide specific antigen (TPS) with outcome of patients with mCRC treated with combination of chemotherapy and monoclonal antibodies against epidermal growth factor receptor (anti-EGFR mAbs) in the first line. In our study, the cohort included 102 patients treated with therapy based on anti-EGFR mAbs between years 2011 and 2017 at Department of Oncology and Radiotherapy, Medical School and University Hospital in Pilsen, Czech Republic. Read More

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October 2018
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Estimated GFR: time for a critical appraisal.

Nat Rev Nephrol 2018 Dec 5. Epub 2018 Dec 5.

Nephrology and Dialysis Unit, Azienda Socio Sanitaria Territoriale Papa Giovanni XXIII, Bergamo, Italy.

Since 1957, over 70 equations based on creatinine and/or cystatin C levels have been developed to estimate glomerular filtration rate (GFR). However, whether these equations accurately reflect renal function is debated. In this Perspectives article, we discuss >70 studies that compared estimated GFR (eGFR) with measured GFR (mGFR), involving ~40,000 renal transplant recipients and patients with chronic kidney disease (CKD), type 2 diabetes mellitus or polycystic kidney disease. Read More

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December 2018

Hybrid prevalence estimation: Method to improve intervention coverage estimations.

Proc Natl Acad Sci U S A 2018 Dec 5. Epub 2018 Dec 5.

Department of International Public Health, Liverpool School of Tropical Medicine, L3 5QA Liverpool, United Kingdom;

Delivering excellent health services requires accurate health information systems (HIS) data. Poor-quality data can lead to poor judgments and outcomes. Unlike probability surveys, which are representative of the population and carry accuracy estimates, HIS do not, but in many countries the HIS is the primary source of data used for administrative estimates. Read More

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December 2018

Higher dietary magnesium intake is associated with lower body mass index, waist circumference and serum glucose in Mexican adults.

Nutr J 2018 Dec 5;17(1):114. Epub 2018 Dec 5.

National Council of Science and Technology (CONACYT) - Center for Nutrition and Health Research, National Institute of Public Health, Cuernavaca, Morelos, Mexico.

Background: Obesity and diabetes mellitus (DM) are public health concerns in Mexico of top-level priority due to their high prevalence and their growth rate in recent decades. The accumulation of adipose tissue leads to an unbalanced release of pro-oxidant factors, which causes cellular damage and favors the development of comorbidities. Recent evidence suggests that oxidative stress also promotes the accumulation of adipose tissue and the development of insulin resistance. Read More

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December 2018

Uniqueness of local myocardial strain patterns with respect to activation time and contractility of the failing heart: a computational study.

Biomed Eng Online 2018 Dec 5;17(1):182. Epub 2018 Dec 5.

Department of Biomedical Engineering, CARIM School for Cardiovascular Diseases, Maastricht University Medical Center, Maastricht, The Netherlands.

Background: Myocardial deformation measured by strain is used to detect electro-mechanical abnormalities in cardiac tissue. Estimation of myocardial properties from regional strain patterns when multiple pathologies are present is therefore a promising application of computer modelling. However, if different tissue properties lead to indistinguishable strain patterns ('degeneracy'), the applicability of any such method will be limited. Read More

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December 2018

Lightweight Workload Fingerprinting Localization Using Affinity Propagation Clustering and Gaussian Process Regression.

Sensors (Basel) 2018 Dec 4;18(12). Epub 2018 Dec 4.

Department of Information and Communication Engineering, Chosun University, Kwangju 501-759, Korea.

Fingerprinting localization approach is widely used in indoor positioning applications owing to its high reliability. However, the learning procedure of radio signals in fingerprinting is time-consuming and labor-intensive. In this paper, an affinity propagation clustering (APC)-based fingerprinting localization system with Gaussian process regression (GPR) is presented for a practical positioning system with the reduced offline workload and low online computation cost. Read More

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December 2018

Experimental Evaluation of Interfacial Surface Cracks in Friction Welded Dissimilar Metals through Image Segmentation Technique (IST).

Materials (Basel) 2018 Dec 4;11(12). Epub 2018 Dec 4.

Department of Mechanical Engineering, College of Engineering, King Khalid University, PO Box 9004, Abha 61413, Asir, Kingdom Saudi Arabia.

Surface cracks on the friction welded interface of dissimilar metals are one of the earliest indications of degradation of the joint, which is a critical aspect for the welding strength. By manual inspection of the friction welded joint, observations of irregularities, porosity voids, crack lengths, cracked surfaces, and depth penetrations of two dissimilar metals can be made. Manual inspection purely depends on a quality expert's experience of quantitative analysis and knowledge. Read More

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December 2018

A Stellar Imaging Error Correction Method Based on an Ellipsoid Model: Taking Ziyuan 3-02 Satellite Data Analysis as an Example.

Sensors (Basel) 2018 Dec 4;18(12). Epub 2018 Dec 4.

College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.

Stellar point image coordinates are one of the important observations needed for high-precision space attitude measurement with a star sensor. High-coupling imaging errors occur under dynamic imaging conditions. Using the results of preliminary star point extraction from star sensor imaging data combined with a superimposed time series, we analyze the relative motion and trajectory based on the star point image, establish an image error ellipsoid fitting model based on the elliptical orbit of a satellite platform, and achieve geometric error correction of a star sensors' image star point using multi-parameter screening of the ambiguous solutions of intersection of the elliptic equations. Read More

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December 2018

Efficient Data Augmentation for Fitting Stochastic Epidemic Models to Prevalence Data.

J Comput Graph Stat 2017 9;26(4):918-929. Epub 2017 Oct 9.

Department of Statistics, University of Washington, Seattle.

Stochastic epidemic models describe the dynamics of an epidemic as a disease spreads through a population. Typically, only a fraction of cases are observed at a set of discrete times. The absence of complete information about the time evolution of an epidemic gives rise to a complicated latent variable problem in which the state space size of the epidemic grows large as the population size increases. Read More

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October 2017

Naturally glossy: Gloss perception, illumination statistics, and tone mapping.

J Vis 2018 Dec;18(13)

Department of Computer Science and Technology, University of Cambridge, Cambridge, UK.

Recognizing materials and understanding their properties is very useful-perhaps critical-in daily life as we encounter objects and plan our interactions with them. Visually derived estimates of material properties guide where and with what force we grasp an object. However, the estimation of material properties, such as glossiness, is a classic ill-posed problem. Read More

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December 2018
1 Read

β-composite Interval Mapping for robust QTL analysis.

PLoS One 2018 3;13(12):e0208234. Epub 2018 Dec 3.

Department of Statistics, University of Rajshahi, Rajshahi, Bangladesh.

Interval mapping approaches have been playing significant role for quantitative trait locus (QTL) mapping to discover genetic architecture of diseases or traits with molecular markers. Composite interval mapping (CIM) is one of the superior approaches of the interval mapping for discovering both linked and unlinked putative QTL positions. However, estimators of this approach are not robust against phenotypic outliers. Read More

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December 2018

Detection and analysis of spatiotemporal patterns in brain activity.

PLoS Comput Biol 2018 Dec 3;14(12):e1006643. Epub 2018 Dec 3.

School of Physics, The University of Sydney, NSW, Australia.

There is growing evidence that population-level brain activity is often organized into propagating waves that are structured in both space and time. Such spatiotemporal patterns have been linked to brain function and observed across multiple recording methodologies and scales. The ability to detect and analyze these patterns is thus essential for understanding the working mechanisms of neural circuits. Read More

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December 2018
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Unconstrained Estimation of HRV Indices after Removing Respiratory Influences from Heart Rate.

IEEE J Biomed Health Inform 2018 Dec 3. Epub 2018 Dec 3.

Objective: This paper proposes an approach to better estimate the sympathovagal balance (SB) and the respiratory sinus arrhythmia (RSA) after separating respiratory influences from the heart rate (HR).

Methods: The separation is performed using orthogonal subspace projections and the approach is first tested using simulated HR and respiratory signals with different spectral properties. Then, RSA and SB are estimated during autonomic blockade and stress using the proposed approach and the classical heart rate variability (HRV) analysis. Read More

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December 2018

A Perceptual Distinguishability Predictor For JND-noise-contaminated Images.

IEEE Trans Image Process 2018 Dec 3. Epub 2018 Dec 3.

Just noticeable difference (JND) models are widely used for perceptual redundancy estimation in images and videos. A common method for measuring the accuracy of a JND model is to inject random noise in an image based on the JND model, and check whether the JND-noise-contaminated image is perceptually distinguishable from the original image or not. Also, when comparing the accuracy of two different JND models, the model that produces the JND-noise-contaminated image with better quality at the same level of noise energy is the better model. Read More

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December 2018

3D auto-context-based locality adaptive multi-modality GANs for PET synthesis.

IEEE Trans Med Imaging 2018 Nov 29. Epub 2018 Nov 29.

Positron emission tomography (PET) has been substantially used recently. To minimize the potential health risk caused by the tracer radiation inherent to PET scans, it is of great interest to synthesize the high-quality PET image from the low-dose one to reduce the radiation exposure. In this paper, we propose a 3D auto-context-based locality adaptive multi-modality generative adversarial networks model (LA-GANs) to synthesize the high-quality FDG PET image from the low-dose one with the accompanying MRI images that provide anatomical information. Read More

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November 2018

Risk Prediction Model for Late Life Depression: Development and Validation on Three Large European Datasets.

IEEE J Biomed Health Inform 2018 Nov 29. Epub 2018 Nov 29.

Assessing the risk to develop a specific disease is the first step towards prevention, both at individual and population level. The development and validation of Risk Prediction Models (RPMs) is the norm within different fields of medicine but still underused in psychiatry, despite the global impact of mental disorders. In particular, there is a lack of RPMs to assess the risk of developing depression, the first worldwide cause of disability and harbinger of functional decline in old age. Read More

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November 2018
1 Read

Complex tensor factorisation with PARAFAC2 for the estimation of brain connectivity from the EEG.

IEEE Trans Neural Syst Rehabil Eng 2018 Nov 28. Epub 2018 Nov 28.

Objective: The coupling between neuronal populations and its magnitude have been shown to be informative for various clinical applications. One method to estimate functional brain connectivity is with electroencephalography (EEG) from which the cross-spectrum between different sensor locations is derived. We wish to test the efficacy of tensor factorisation in the estimation of brain connectivity. Read More

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November 2018
1 Read

Direct Estimation of Voxel-wise Neurotransmitter Response Maps from Dynamic PET Data.

IEEE Trans Med Imaging 2018 Nov 28. Epub 2018 Nov 28.

Computational methods, such as the linear parametric neurotransmitter PET (lp-ntPET) method, have been developed to characterise the transient changes in radiotracer kinetics in the target tissue during endogenous neurotransmitter release. In this paper, we describe and evaluate a parametric reconstruction algorithm that uses an expectation maximisation framework, along with the lp-ntPET model, to estimate the endogenous neurotransmitter response to stimuli directly from the measured PET data. Computer simulations showed that the proposed direct reconstruction method offers improved accuracy and precision for the estimated timing parameters of the neurotransmitter response at the voxel level (td = 1 ± 2min, for activation onset bias and standard deviation), compared to conventional post reconstruction modelling (td = 4 ± 7min). Read More

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November 2018
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Alternating Diffusion Map Based Fusion of Multimodal Brain Connectivity Networks for IQ Prediction.

IEEE Trans Biomed Eng 2018 Nov 29. Epub 2018 Nov 29.

Objective: To explain individual differences in development, behavior, and cognition, most previous studies focused on projecting resting-state functional MRI (fMRI) based functional connectivity (FC) data into a low-dimensional space via linear dimensionality reduction techniques, followed by executing analysis operations. However, linear dimensionality analysis techniques may fail to capture nonlinearity of brain neuroactivity. Moreover, besides resting-state FC, FC based on task fMRI can be expected to provide complementary information. Read More

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November 2018

Mindfulness-based interventions for teachers: A meta-analysis of the emerging evidence base.

Sch Psychol Q 2018 Dec;33(4):501-511

Department of Psychology, Utah State University.

Teachers report high levels of occupational stress, which is associated with teacher turnover and potential negative consequences for students. Mindfulness-based interventions (MBIs) may improve the protective factors that buffer educators against occupational stress. Although previous meta-analytic reviews synthesized the effects of MBIs for healthy and clinical samples of adults, this study was the first to synthesize the effects of MBIs for teachers (grades pre-K through 12). Read More

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December 2018

Letter to the Editor: Confidence intervals that cross zero must be interpreted correctly.

Authors:
Joanna Diong

Scand J Med Sci Sports 2018 Dec 2. Epub 2018 Dec 2.

School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, New South Wales, Australia.

In a recent study, Pamboris and colleagues reported that dynamic stretching is not detrimental to neuromechanical and sensorimotor performance of the ankle plantarflexors. In this study, investigators used a crossover design to compare joint mechanical properties and proprioception outcomes in 18 healthy subjects who received slow and fast dynamic stretches to the plantarflexor muscles. Investigators used an estimation-based approach to quantify mean differences and confidence intervals of within- and between-condition comparisons (i. Read More

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December 2018

Test-retest variability for quantitative two-dimensional and doppler measurements in the fetus.

Echocardiography 2018 Dec 1. Epub 2018 Dec 1.

Sibley Heart Center Cardiology, Emory University School of Medicine, Atlanta, Georgia.

Objectives: Echocardiography is used to quantitatively characterize cardiovascular function in fetuses with cardiac abnormalities and inform decisions for fetal or perinatal interventions. It is clinically important to understand the reproducibility of these measures, particularly between testers. While studies have reported intra-observer variability and inter-observer variability, little is known about test-retest variability for these measures. Read More

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December 2018

Study of gene expression and steviol glycosides accumulation in Stevia rebaudiana Bertoni under various mannitol concentrations.

Mol Biol Rep 2018 Dec 1. Epub 2018 Dec 1.

Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.

Stevia rebaudiana produces sweet steviol glycosides that are 300 times sweeter than sugar and have the beneficial effects on human health including anti-hyperglycaemic. Tissue culture is the best method with high efficacy to propagate stevia. Abiotic stress has an impact on steviol glycoside contents in stevia. Read More

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December 2018

Estimation of split renal function using different volumetric methods: inter- and intraindividual comparison between MRI and CT.

Abdom Radiol (NY) 2018 Dec 1. Epub 2018 Dec 1.

Institute of Diagnostic and Interventional Radiology, University Hospital Cologne, Kerpener Str. 62, 50937, Cologne, Germany.

Purpose: This study aims to determine whether contrast-enhanced (CE)-magnetic resonance imaging (MRI) is comparable to CE-computed tomography (CT) for estimation of split renal function (SRF). For this purpose, two different kidney volumetry methods, the renal cortex volumetry (RCV) and modified ellipsoid volume (MELV), are compared for both acquisition types (CT vs. MRI) with regard to accuracy and reliability, subsequently referred to as RCV/RCV and MELV/MELV. Read More

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December 2018
1 Read

The estimation of Miscanthus×giganteus' adaptive potential for cultivation on the mining and post-mining lands in Ukraine.

Environ Sci Pollut Res Int 2018 Nov 30. Epub 2018 Nov 30.

Dnipro State Agrarian and Economic University, Sergey Efremov str., 25, Dnipro, 49600, Ukraine.

The possibility of Miscanthus×giganteus cultivation as an energy crop on the different types of mining rocks was studied. It was revealed that a loess-like loam and red-brown clay with the added black soil were the most suitable for plant growing. The yield of dry above-ground biomass ranged from 4. Read More

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November 2018
2 Reads

Evaluation of multivariate adaptive non-parametric reduced-order model for solving the inverse electrocardiography problem: a simulation study.

Med Biol Eng Comput 2018 Dec 1. Epub 2018 Dec 1.

Institute of Applied Mathematics, Middle East Technical University, Üniversiteler Mahallesi Dumlupınar Bulvarı, No:1, 06800, Çankaya/Ankara, Turkey.

In the inverse electrocardiography (ECG) problem, the goal is to reconstruct the heart's electrical activity from multichannel body surface potentials and a mathematical model of the torso. Over the years, researchers have employed various approaches to solve this ill-posed problem including regularization, optimization, and statistical estimation. It is still a topic of interest especially for researchers and clinicians whose goal is to adopt this technique in clinical applications. Read More

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December 2018

Cone Beam CT-Based Preoperative Volumetric Estimation of Bone Graft Required for Lateral Window Sinus Augmentation, Compared with Intraoperative Findings: A Pilot Study.

Open Dent J 2018 25;12:820-826. Epub 2018 Oct 25.

Department of Periodontology, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia.

Introduction: The presence of an atrophic maxilla creates a serious challenge in cases of implant placement, while maxillary sinus pneumatization further complicates the surgery. This pilot study was performed to investigate the validity of two techniques used to estimate the volumes of bone graft material required in cases that included lateral window sinus augmentation.

Materials And Methods: Cone beam computed tomography was used for preoperative volumetric analysis of the maxillary sinus. Read More

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October 2018

Estimation of the National Burden of Disease and Vulnerable Population Associated with Natural Disasters in Korea: Heavy Precipitation and Typhoon.

J Korean Med Sci 2018 Dec 14;33(49):e314. Epub 2018 Nov 14.

Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Korea.

Background: Despite its growing significance, studies on the burden of disease associated with natural disasters from the perspective of public health were few. This study aimed at estimating the national burden of disease associated with typhoons and torrential rains in Korea.

Methods: During the period of 2002-2012, 11 typhoons and five torrential rains were selected. Read More

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December 2018

Initial risk stratification and staging in prostate cancer with prostatic-specific membrane antigen positron emission tomography/computed tomography: A first-stop-shop.

World J Nucl Med 2018 Oct-Dec;17(4):261-269

Department of Nuclear Medicine, Rajiv Gandhi Cancer Institute and Research Centre, New Delhi, India.

Current imaging for prostate cancer (PCa) had limitations for risk stratification and staging. Magnetic resonance imaging frequently underestimated lymph node metastasis while bone scintigraphy often had diagnostic dilemmas. Prostatic-specific membrane antigen (PSMA) positron emission tomography-computed tomography (PET/CT) has been remarkable in PCa recurrence. Read More

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December 2018
1 Read

Scintigraphic evaluation of colonic transit in children with constipation using Ga-citrate.

World J Nucl Med 2018 Oct-Dec;17(4):249-252

Hospital de Base do Distrito Federal - Nuclear Medicine Service, Brasília, Brasil.

The aim of this study was to assess the colonic transit in children and teenagers with chronic constipation. Twenty patients from 1.5 to 16 years old were included (mean age = 6. Read More

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December 2018

Multiple Matrix Gaussian Graphs Estimation.

J R Stat Soc Series B Stat Methodol 2018 Nov 14;80(5):927-950. Epub 2018 Jun 14.

Division of Biostatistics, University of California at Berkeley.

Matrix-valued data, where the sampling unit is a matrix consisting of rows and columns of measurements, are emerging in numerous scientific and business applications. Matrix Gaussian graphical model is a useful tool to characterize the conditional dependence structure of rows and columns. In this article, we employ nonconvex penalization to tackle the estimation of multiple graphs from matrix-valued data under a matrix normal distribution. Read More

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November 2018

Identification of bioactive phytochemical from two species using GC-MS and estimation of antioxidant activity of seed extracts.

Saudi J Biol Sci 2018 Nov 26;25(7):1420-1428. Epub 2015 Nov 26.

King Saud University, Science College, Botany and Microbiology Department, P. O. Box 2455, 11451 Riyadh, Saudi Arabia.

species are medicinally important plants belonging to the family Lythraceae. The pomegranate is widely reported to exhibit antiviral, antioxidant, anticancer, anti-proliferative activities. In the present study the ethanolic extract of the peel seeds of two species of ( and ) were subjected to GC-MS analysis. Read More

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November 2018