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Boef Anna G C AG From the aDepartment of Clinical Epidemiology; bDepartment of Intensive Care; cDepartment of Medical Statistics and Bioinformatics; and dDepartment of Endocrinology and Metabolic Diseases, Leiden University Medical Centre, Leiden, The - - 2014
Instrumental variable methods can potentially circumvent the unmeasured confounding inherent in observational data analyses. We investigated the validity and usefulness of physician's preference instrumental variable analysis in the setting of a moderate-sized clinical study. Using routine care data from 476 elective cardiac surgery patients, we assessed the effect of preoperative ...
VanderWeele Tyler J TJ From the Departments of Epidemiology and Biostatistics, Harvard School of Public Health, Boston, - - 2014
A framework is presented that allows an investigator to estimate the portion of the effect of one exposure that is attributable to an interaction with a second exposure. We show that when the 2 exposures are statistically independent in distribution, the total effect of one exposure can be decomposed into ...
Frølich Laura L Section for Cognitive Systems, DTU Compute, Technical University of Denmark, Lyngby, - - 2014
In this study, we aim to automatically identify multiple artifact types in EEG. We used multinomial regression to classify independent components of EEG data, selecting from 65 spatial, spectral, and temporal features of independent components using forward selection. The classifier identified neural and five nonneural types of components. Between subjects ...
Livesay R J RJ Mason Livesay Scientific, LLC, 1519 Fremont Place, Knoxville, TN 37917, United States. Electronic address: - - 2014
A complete understanding of both the steady state and transient background measured by Radiation Portal Monitors (RPMs) is essential to predictable system performance, as well as maximization of detection sensitivity. To facilitate this understanding, a test bed for the study of natural background in RPMs has been established at the ...
Kim Hyungjin H Department of Radiology, Seoul National University College of Medicine, 101 Daehangno, Jongno-gu, Seoul, 110-744, South - - 2014
To compare the pulmonary subsolid nodule (SSN) classification agreement and measurement variability between filtered back projection (FBP) and model-based iterative reconstruction (MBIR). Low-dose CTs were reconstructed using FBP and MBIR for 47 patients with 47 SSNs. Two readers independently classified SSNs into pure or part-solid ground-glass nodules, and measured the ...
Schoville Benjamin J BJ Institute of Human Origins, School of Human Evolution and Social Change, Arizona State University, Tempe, AZ 85287, USA. Electronic address: - - 2014
Zooarchaeologists frequently use the relative abundance of skeletal elements in faunal assemblages in conjunction with foraging theory models to infer subsistence decisions made by prehistoric hunter-gatherers. However, foraging models applied to ethnoarchaeological cases have had variable success linking skeletal transport decisions with foraging predictions. Here, we approach this issue with ...
Junkes-Cunha Maíra - - 2014
Functional evaluation of sit-to-stand and stand-to-sit activities is often used by physiotherapists in patients with neurological and musculoskeletal disorders. The observation of the way these activities are executed is essential in identifying kinesiological problems. There are different methodologies used to describe the stand-to-sit activity and its evaluation is not yet ...
Hu Chuanpu C Pharmacokinetics and Pharmacometrics, Biologics Clinical Pharmacology, Janssen Research and Development, LLC, 1400 McKean Road, PO Box 776, Spring House, PA, 19477, USA, - - 2014
Informative exposure-response modeling of clinical endpoints is important in drug development. There has been much recent progress in latent variable modeling of ordered categorical endpoints, including the application of indirect response (IDR) models and accounting for residual correlations between multiple categorical endpoints. This manuscript describes a framework of latent-variable-based IDR ...
Dinh Nikita N NN Analytical Sciences, Amgen Inc., 4000 Nelson Road, Longmont, CO - - 2014
Previously, different approaches of spectral comparison were evaluated, and the Spectral Difference (SD) method was shown to be valuable for its linearity with spectral changes and its independence on data spacing [1]. In this note, we present an enhancement of the SD calculation, referred to as the Weighted Spectral Difference ...
Huizer Daan D Department of Environmental Science, Institute for Water and Wetland Research, Faculty of Science, Radboud University, Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands; Caesar Consult Nijmegen, PO Box 31070, 6503 CB Nijmegen, The Netherlands. Electronic address: - - 2014
The application of human physiologically based pharmacokinetic (PBPK) modelling combined with measured biomonitoring data, has a great potential to backtrack external exposure to chemicals during chemical incidents. So far, an important shortcoming of 'reversed dosimetry' is that uncertainty and variability in the model predictions are often neglected. The aim of ...
Jupiter Daniel C DC Assistant Professor, Department of Preventive Medicine and Community Health, The University of Texas Medical Branch, Galveston, TX. Electronic address: - - 2014
How do we know which variables we should include in our multivariate analyses? What role does each variable play in our understanding of the analysis? In this article I begin a discussion of these issues and describe 2 different types of studies for which this problem must be handled in ...
Mishra Garima G Thermo-Catalytic Processes Area (TPA), Bio-Fuels Division (BFD), CSIR-Indian Institute of Petroleum (IIP), Dehradun 248005, - - 2014
The kinetics of thermal decomposition of rice straw was studied by thermogravimetry. Non-isothermal thermogravimetric data of rice straw decomposition in nitrogen atmosphere at six different heating rates of 5-40°C/min was used for evaluating kinetics using several model free kinetic methods. The results showed that the decomposition process exhibited two zones ...
López-Fenner Julio J Departamento de Ingeniería Matemática, Universidad de La Frontera, Casilla 54-D, Temuco, Chile, - - 2014
The establishment of associations between bivalents from Mus domesticus [Formula: see text] spermatocytes is a common phenomenon that shows up during the first prophase of meiotic nuclei. In each nucleus, a seemingly random display of variable size clusters of bivalents in association is observed. These associations originate a particular nuclear ...
Wang Yu Y State Key Laboratory of Molecular Engineering of Polymers, Laboratory of Advanced Materials and Department of Macromolecular Science, Fudan University, Shanghai 200433, People's Republic of China. - - 2014
Variability is a common feature of natural silk fibres, caused by a range of natural processing conditions. Better understanding of variability will not only be favourable for explaining the enviable mechanical properties of animal silks but will provide valuable information for the design of advanced artificial and biomimetic silk-like materials. ...
Dong Guangheng G Department of Psychology, Zhejiang Normal University, 688 Yingbin Road, Jinhua, Zhejiang Province, 321004, PR China. Electronic address: - - 2014
Cognitive contributions to the behaviors observed in substance and non-substance addictions have been investigated and characterized. Based on models of drug addictions and the extant literature on Internet gaming disorder (IGD), we propose a cognitive-behavioral model for conceptualizing IGD. The model focuses on three domains and their roles in addictive ...
Wilson J G JG Zoology Dept., TCD, Dublin 2, Ireland. Electronic address: - - 2014
The conventional view of pollution monitoring is that any choice is a trade-off between realism and precision, as the control over confounding variables decreases with the increasing degree of organization of the test system. Dublin Bay is subject to considerable anthropogenic pressures and there have been many attempts to quantify ...
Osaka Hiroshi H Department of Rehabilitation, Faculty of Health Science and Technology, Kawasaki University of Medical Welfare , Okayama , Japan - - 2014
Abstract Purpose: The purposes of this study were to construct a real-time acceleration gait analysis system equipped with software to analyse real-time trunk acceleration during walking and to examine the intra-rater and inter-rater reliabilities of the this system. Methods: This system has been comprised of an accelerometer, an acceleration amplifier, ...
Perles Stephanie J SJ National Park Service, Eastern Rivers and Mountains Network, Department of Ecosystem Science and Management, Pennsylvania State University, 422 Forest Resources Building, University Park, PA, 16802, USA, - - 2014
Forests are socioeconomically and ecologically important ecosystems that are exposed to a variety of natural and anthropogenic stressors. As such, monitoring forest condition and detecting temporal changes therein remain critical to sound public and private forestland management. The National Parks Service's Vital Signs monitoring program collects information on many forest ...
Sadreazami H - - 2014
In the past decade, several schemes for digital image watermarking have been proposed to protect the copyright of an image document or to provide proof of ownership in some identifiable fashion. This paper proposes a novel multiplicative watermarking scheme in the contourlet domain. The effectiveness of a watermark detector depends ...
Doldan M S MS Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Rivadavia 1917, C1033AAJ Ciudad Autónoma de Buenos Aires, Argentina; Instituto de Biología Marina y Pesquera "Almirante Storni", Universidad Nacional del Comahue, Güemes 1030, 8520 San Antonio Oeste, Provincia de Río Negro, Argentina. Electronic address: - - 2014
Wild oyster populations have declined severely worldwide, however fluctuations of South Atlantic populations are poorly documented. We explored the changes in the abundance of Ostrea puelchana population of Northern Patagonia, Argentina, by linking data from paleontological, archaeological and informal sources, with time series data from fishing, ecological and studies of ...
Garabedian Laura Faden - - 2014
Instrumental variable analysis is an increasingly popular method in comparative effectiveness research (CER). In theory, the instrument controls for unobserved and observed patient characteristics that affect the outcome. However, the results of instrumental variable analyses in observational settings may be biased if the instrument and outcome are related through an ...
Chen Yin-Hua YH Research Center for Mind, Brain and Learning, National Chengchi University, Taipei City, - - 2014
Evaluating time properly is crucial for everyday activities from fundamental behaviors to refined coordinative movements such as in sport playing. Lately the concept of the existence of a unique internal clock for evaluating time in different scales has been challenged by recent neurophysiology studies. Here we provide the evidence that ...
Sekimura Toshio T Department of Biological Chemistry, Graduate School of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi 487-8501, - - 2014
We present a mathematical model for population dynamics of the mimetic swallowtail butterfly Papilio polytes in Sakishima Islands, Japan. The model includes four major variables, that is, population densities of three kinds of butterfies (two female forms f. cyrus, f. polytes and the unpalatable butterfly Pachliopta aristrochiae) and their predator. ...
Paraskevopoulou Sivylla E SE Department of Electrical and Electronic Engineering,Imperial College London, SW7 2BT, UK. Electronic address: - - 2014
This work presents a novel unsupervised algorithm for real-time adaptive clustering of neural spike data (spike sorting). The proposed Hierarchical Adaptive Means (HAM) clustering method combines centroid-based clustering with hierarchical cluster connectivity to classify incoming spikes using groups of clusters. It is described how the proposed method can adaptively track ...
Shao Yu Y Department of Electrical and Computer Engineering, Auburn University, Alabama, - - 2014
The local specific absorption rate (SAR) is critical to the safety of radio frequency transmit coils. A statistical simulation approach is introduced to address the local SAR variability related to tissue property and geometric variations. The local SAR is modeled as the output of a nonlinear transformation with factors that ...
Qin Sitian - - 2014
In this paper, a two-layer recurrent neural network is proposed to solve the nonsmooth convex optimization problem subject to convex inequality and linear equality constraints. Compared with existing neural network models, the proposed neural network has a low model complexity and avoids penalty parameters. It is proved that from any ...
Mendes Paula P CENSE - Center for Environmental and Sustainability Research, Lisbon, Portugal Loulé City Hall, Loulé, - - 2014
This article demonstrates how decision-makers can be guided in the process of defining performance target values in the balanced scorecard system. We apply a method based on sensitivity analysis with Monte Carlo simulation to the municipal solid waste management system in Loulé Municipality (Portugal). The method includes two steps: sensitivity ...
Burke Ariane A Département d'Anthropologie, Université de Montréal, C.P. 6128, Centre-Ville, QC, Canada H3C 3J7. Electronic address: - - 2014
The Last Glacial Maximum (LGM) was a global climate event, which had significant repercussions for the spatial distribution and demographic history of prehistoric populations. In Eurasia, the LGM coincides with a potential bottleneck for modern humans and may mark the divergence date for Asian and European populations (Keinan et al., 2007). ...
Huang Yingbo Y Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, P.O. Box 650500, Kunming, - - 2014
This paper proposes adaptive control designs for vehicle active suspension systems with unknown nonlinear dynamics (e.g., nonlinear spring and piece-wise linear damper dynamics). An adaptive control is first proposed to stabilize the vertical vehicle displacement and thus to improve the ride comfort and to guarantee other suspension requirements (e.g., road ...
Farnam Arash A Electrical Engineering Department, Sahand University of Technology, Tabriz, Iran. Electronic address: - - 2014
This paper investigates the problem of stability analysis and stabilization for networked control systems with the network-induced delay and data dropout. In order to obtain less conservative results, a novel augmented Lyapunov-Krasovskii functional is introduced and new free-weighting matrices are employed to make some extra degrees of freedom in the ...
Wang Zi-Qiang - - 2014
The power spectrum density (PSD) has long been explored for calibrating optical tweezers stiffness. Fast Fourier Transform (FFT) based spectral estimator is typically used. This approach requires a relatively longer data acquisition time to achieve adequate spectral resolution. In this paper, an autoregressive (AR) model is proposed to obtain the ...
Piairo Helena H Department of Mathematics and Applications, University of Minho, Campus de Azurém, 4800-058, Guimarãs, Potugal, - - 2014
The use of mosses as biomonitors operates as an indicator of their concentration in the environment, becoming a methodology which provides a significant interpretation in terms of environmental quality. The different types of pollution are variables that can not be measured directly in the environment - latent variables. Therefore, we ...
Medford Andrew J AJ SUNCAT Center for Interface Science and Catalysis, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA. SUNCAT Center for Interface Science and Catalysis, Department of Chemical Engineering, Stanford University, Stanford, CA 94305, - - 2014
We introduce a general method for estimating the uncertainty in calculated materials properties based on density functional theory calculations. We illustrate the approach for a calculation of the catalytic rate of ammonia synthesis over a range of transition-metal catalysts. The correlation between errors in density functional theory calculations is shown ...
Tozer Mark G MG New South Wales Office of Environment and Heritage, PO Box 1967, Hurstville 2220 Australia - - 2014
Seed dormancy enhances fitness by preventing seeds from germinating when the probability of seedling survival and recruitment is low. The onset of physical dormancy is sensitive to humidity during ripening; however, the implications of this mechanism for seed bank dynamics have not been quantified. This study proposes a model that ...
Christen Verena V University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences, Gründenstrasse 40, CH-4132 Muttenz, - - 2014
Many pesticides including pyrethroids and azole fungicides are suspected to have an endocrine disrupting property. At present, the joint activity of compound mixtures is only marginally known. Here we tested the hypothesis that the antiandrogenic activity of mixtures of azole fungicides can be predicted by the concentration addition (CA) model. ...
Kadipasaoglu C M CM Vivian Smith Department of Neurosurgery, Univ. of Texas Medical School at Houston, 6431 Fannin Street, Suite G.550D Houston, TX 77030, - - 2014
Electrocorticography (ECoG) in humans yields data with unmatched spatio-temporal resolution that provides novel insights into cognitive operations. However, the broader application of ECoG has been confounded by difficulties in accurately depicting individual data and performing statistically valid population-level analyses. To overcome these limitations, we developed methods for accurately registering ECoG ...
Viviano Gaetano G CNR - Water Research Institute (IRSA), Via del Mulino 19, Brugherio (MB) 20861, - - 2014
Until robust in situ sensors for total phosphorus (TP) are developed, continuous water quality measurements have the potential to be used as surrogates for generating high frequency estimates. Their use has widespread implications for water quality monitoring programmes considering that TP, in particular, is generally recognised as the limiting factor ...
Kloprogge Frank F Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, 420/6 Rajvithi Road, Bangkok, 10400, Thailand, - - 2014
Simultaneous modelling of dense and sparse pharmacokinetic data is possible with a population approach. To determine the number of individuals required to detect the effect of a covariate, simulation-based power calculation methodologies can be employed. The Monte Carlo Mapped Power method (a simulation-based power calculation methodology using the likelihood ratio ...
Harrington Peter de Boves - - 2014
Forty-one samples of skim milk powder (SMP) and non-fat dry milk (NFDM) from 8 suppliers, 13 production sites, and 3 processing temperatures were analyzed by NIR diffuse reflectance spectrometry over a period of three days. NIR reflectance spectra (1700-2500 nm) were converted to pseudo-absorbance and examined using (a) analysis of ...
Jones Christina L CL a Department of Communication , University of - - 2014
The Health Belief Model (HBM) posits that messages will achieve optimal behavior change if they successfully target perceived barriers, benefits, self-efficacy, and threat. While the model seems to be an ideal explanatory framework for communication research, theoretical limitations have limited its use in the field. Notably, variable ordering is currently ...
Kawabata Yuuki Y Institute for East China Sea Research, Japan; - - 2014
We examined whether we could identify the feeding behaviours of the trophic generalist fish Epinephelus ongus on different prey types (crabs and fish) using a data-logger that incorporated a 3-axis gyroscope and a 3-axis accelerometer. Feeding behaviours and other burst behaviours, including escape responses, intraspecific interactions, and routine movements, were ...
Lacerda Thaisa Cardoso TC Brazilian Institute for Digital Convergence - INCoD, Informatics and Statistics - - 2014
One of the main reasons that leads to a low adoption rate of telemedicine systems is poor usability. An aspect that influences usability during the reporting of findings is the input mode, e.g., if a free-text (FT) or a structured report (SR) interface is employed. The objective of our study ...
Richter Chris C Insight Centre Data Analytics, Dublin, Ireland; CLARITY: Centre for Sensor Web Technologies, Dublin City University, Dublin, Ireland; Applied Sports Performance Research, School of Health and Human Performance, Dublin City University, Dublin, Ireland; Sports Surgery Clinic, Santry Demense, Dublin 9, Ireland. Electronic address: - - 2014
The aim of this study was to assess and compare the ability of discrete point analysis (DPA), functional principal component analysis (fPCA) and analysis of characterizing phases (ACP) to describe a dependent variable (jump height) using vertical ground reaction force curves captured during the propulsion phase of a countermovement jump. ...
Brookings Ted T Brandeis University - - 2014
We describe a new technique to fit conductance-based neuron models to intracellular voltage traces from isolated biological neurons. The biological neurons are recorded in current clamp with pink (1/f) noise injected to perturb the neuron's activity. The new algorithm finds a set of parameters that allows a multi-compartmental model neuron ...
Fang Hongqing H College of Energy & Electrical Engineering, Hohai University, 8 Focheng West Road, Nanjing, Jiangsu 211100, PR China. Electronic address: - - 2014
In this paper, Back-propagation(BP) algorithm has been used to train the feed forward neural network for human activity recognition in smart home environments, and inter-class distance method for feature selection of observed motion sensor events is discussed and tested. And then, the human activity recognition performances of neural network using ...
Steyer Rolf R Department of Methodology and Evaluation Research, Friedrich Schiller University Jena, 07743 Jena, Germany; email: - - 2014
We present a revision of latent state-trait (LST-R) theory with new definitions of states and traits. This theory applies whenever we study the consistency of behavior, its variability, and its change over time. States and traits are defined in terms of probability theory. This allows for a seamless transition from ...
Baiker Martin M Netherlands Forensic Institute, Laan van Ypenburg 6, 2497GB Den Haag, The Netherlands. Electronic address: - - 2014
A comparison of striated toolmarks by human examiners is dependent on the experience of the expert and includes a subjective judgment within the process. In this article an automated method is presented for objective comparison of striated marks of screwdrivers. The combination of multi-scale registration (alignment) of toolmarks, that accounts ...
Arif Muhammad M Department of Computer Science College of Computer and Information systems, Umm-Alqura University, Makkah, Saudi Arabia, - - 2014
Obesity is becoming one of the serious problems for the health of worldwide population. Social interactions on mobile phones and computers via internet through social e-networks are one of the major causes of lack of physical activities. For the health specialist, it is important to track the record of physical ...
Berry Tyrus T Department of Mathematics , The Pennsylvania State University , University Park, PA 16802, - - 2014
In this paper, we study filtering of multiscale dynamical systems with model error arising from limitations in resolving the smaller scale processes. In particular, the analysis assumes the availability of continuous-time noisy observations of all components of the slow variables. Mathematically, this paper presents new results on higher order asymptotic ...
Kivinen Sonja S Department of Geography and Geology, University of Turku, 20014, Turku, Finland, - - 2014
We studied trends and variability in snow and climate characteristics in 1978-2012 in the Värriötunturit fell area, northern Finland. Cold season changes were examined using long-term observational data on snow depths, meteorological data, large-scale climate indices, and reindeer herders' experiences with difficult snow conditions. Snow depths declined, and temperatures increased ...
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