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Results 401 - 450 of 6533
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Reinhardt Sascha S ENVINET GmbH, Haar, - - 2014
In environmental radiation monitoring, the time-variable natural gamma radiation background complicates the nuclide identification and analysis of a gamma spectrum. A full spectrum analysis based on the noise adjusted singular value decomposition method for the description of the time-variable background and adjustment calculations is a possible analysis method, which may ...
Gervini Daniel D Department of Mathematical Sciences, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, Wisconsin 53201, - - 2014
This article presents an Analysis of Variance model for functional data that explicitly incorporates phase variability through a time-warping component, allowing for a unified approach to estimation and inference in presence of amplitude and time variability. The focus is on single-random-factor models but the approach can be easily generalized to ...
McCool Paul - - 2014
This paper presents a new Electromyography Activity Detection technique in which one-dimensional Local Binary Pattern histograms are used to distinguish between periods of activity and inactivity in myoelectric signals. The algorithm is tested on forearm surface myoelectric signals occurring due to hand gestures. The novel features of the presented method ...
Ghaedi M M Chemistry Department, Yasouj University, Yasouj 75914-35, Iran. Electronic address: - - 2014
In this research, a novel adsorbent gold nanoparticle loaded on activated carbon (Au-NP-AC) was synthesized by ultrasound energy as a low cost routing protocol. Subsequently, this novel material characterization and identification followed by different techniques such as scanning electron microscope(SEM), Brunauer-Emmett-Teller(BET) and transmission electron microscopy (TEM) analysis. Unique properties such ...
Tucker George G Massachusetts Institute of - - 2014
Using a reduced subset of SNPs in a linear mixed model can improve power for genome-wide association studies, yet this can result in insufficient correction for population stratification. We propose a hybrid approach using principal components that does not inflate statistics in the presence of population stratification and improves power ...
Foldnes Njål - - 2014
The unconstrained product indicator (PI) approach is a simple and popular approach for modeling nonlinear effects among latent variables. This approach leaves the practitioner to choose the PIs to be included in the model, introducing arbitrariness into the modeling. In contrast to previous Monte Carlo studies, we evaluated the PI ...
Bhaduri Susmita S Department of Physics, Jadavpur University, Kolkata, - - 2014
Usual techniques for electroencephalographic (EEG) data analysis lack some of the important properties essential for quantitative assessment of the progress of the dysfunction of the human brain. EEG data are essentially nonlinear and this nonlinear time series has been identified as multi-fractal in nature. We need rigorous techniques for such ...
Yousefi Ali A Department of Electrical Engineering, University of Southern California, DRB 140, 1042 Downey Way, Los Angeles, CA, 90089-1111, United States. Electronic address: - - 2014
In this research, temporal processing in brain neural circuitries is addressed by a dynamic model of synaptic connections in which the synapse model accounts for both pre- and post-synaptic processes determining its temporal dynamics and strength. Neurons, which are excited by the post-synaptic potentials of hundred of the synapses, build ...
Correia-Gomes Carla - - 2014
Transmission models can aid understanding of disease dynamics and are useful in testing the efficiency of control measures. The aim of this study was to formulate an appropriate stochastic Susceptible-Infectious-Resistant/Carrier (SIR) model for Salmonella Typhimurium in pigs and thus estimate the transmission parameters between states. The transmission parameters were estimated ...
Yen Hsiao-Pei HP Institute of Modern History, Academia Sinica, Taipei, Taiwan, ROC, - - 2014
This paper discusses how the theory of evolutionary Asiacentrism and the Peking Man findings at the Zhoukoudian site stimulated Chinese intellectuals to construct Sinocentric ethno-nationalism during the period from the late 1920s to the early 1940s. It shows that the theory was first popularized by foreign scientists in Beijing, and ...
Galtier Mathieu N MN School of Engineering and Science, Jacobs University Bremen gGmbH, 28759 Bremen, Germany. Electronic address: - - 2014
A method is provided for designing and training noise-driven recurrent neural networks as models of stochastic processes. The method unifies and generalizes two known separate modeling approaches, Echo State Networks (ESN) and Linear Inverse Modeling (LIM), under the common principle of relative entropy minimization. The power of the new method ...
Smith Adam B AB York Health Economics Consortium, University of York, Market Square, York YO10 5NH, UK; Research Innovation Office, University of York, York YO10 5DG, UK. Electronic address: - - 2014
The study's aim was to assess the internal reliability for the nine domains of the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) to evaluate homogeneity across clinical studies and whether sample characteristics predict coefficient heterogeneity. A systematic literature review was undertaken. Internal reliability ...
Garcia Benjamin B Integrated Center for Genes, Environment, and Health, National Jewish Health, Denver, CO, 80206, USA; Computational Bioscience Program, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, 80045, - - 2014
Advances in multiplex qRT-PCR have enabled increasingly accurate and robust quantification of RNA, even at lower concentrations, facilitating RNA expression profiling in clinical and environmental samples. Here we describe a data-driven qRT-PCR normalization method, the minimum variance method, and evaluate it on clinically derived Mycobacterium tuberculosis samples with variable transcript ...
Mofrad Farshid Babapour FB Faculty of Engineering, Science and Research Branch, Islamic Azad University (IAU), Tehran, 14515-775, Iran, - - 2014
Liver-shape analysis and quantification is still an open research subject. Quantitative assessment of the liver is of clinical importance in various procedures such as diagnosis, treatment planning, and monitoring. Liver-shape classification is of clinical importance for corresponding intra-subject and inter-subject studies. In this research, we propose a novel technique for ...
Auer Michael M neccton ltd, Office 404 Albany House, 324 Regent Street, London, W1B 3HH, UK, - - 2014
In this paper, we provide a brief response to Braverman et al. (J Gambl Stud. doi: 10.1007/s10899-013-9428-z , 2013b) critique of our 'Theoretical Loss' metric as a measure of monetary gambling intensity (Auer and Griffiths in J Gambl Stud. doi: 10.1007/s10899-013-9376-7 , 2013a; Auer et al. in Gaming Law Rev ...
Paduszyński Kamil - - 2014
A knowledge on various thermophysical (in particular transport) properties of ionic liquids (ILs) is crucial from the point of view of potential applications of these fluids in chemical and related industries. In this work, over 13 000 data points of temperature- and pressure-dependent viscosity of 1484 ILs were retrieved from ...
Mortaza N N Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia - - - 2014
Fall is a common and a major cause of injuries. It is important to find elderlies who are prone to falls. The majority of serious falls occur during walking among the older adults. Analyzing the spatio-temporal parameters of walking is an easy way of assessment in the clinical setting, but ...
Rodríguez-Liñares L L Department of Computer Science, ESEI, University of Vigo, Spain(1). Electronic address: - - 2014
In this paper, the gHRV software tool is presented. It is a simple, free and portable tool developed in python for analysing heart rate variability. It includes a graphical user interface and it can import files in multiple formats, analyse time intervals in the signal, test statistical significance and export ...
Etienne Rampal S RS Community and Conservation Ecology Group, Centre for Ecological and Evolutionary Studies, University of Groningen, Box 11103, 9700 CC, Groningen, The Netherlands. - - 2014
Speciation is not instantaneous but takes time. The protracted birth-death diversification model incorporates this fact and predicts the often observed slowdown of lineage accumulation towards the present. The mathematical complexity of the protracted speciation model has barred estimation of its parameters until recently a method to compute the likelihood of ...
de Boer J Posthuma JP The Blackett Laboratory, Imperial College London, London SW7 2AZ, United - - 2014
We describe an algorithm that searches the parameter space of rate theories to optimize the associated rate coefficients based on a fit to experimental (or any other) data. Beginning with an initial set of parameters, which may be estimated, partially calculated, or indeed random, the algorithm follows a path, calculating ...
Rieger R - - 2014
The importance of body sensor networks to monitor patients over a prolonged period of time has increased with an advance in home healthcare applications. Sensor nodes need to operate with very low-power consumption and under the constraint of limited memory capacity. Therefore, it is wasteful to digitize the sensor signal ...
Huryn Thomas - - 2014
Two factors commonly differentiate proposed balance control models for quiet human standing: i) intermittent muscle activation and ii) prediction that overcomes sensorimotor time delays. In this experiment we assessed the viability and performance of intermittent activation and prediction in a balance control loop that included the neuromuscular dynamics of human ...
Sengupta B B Wellcome Trust Centre for Neuroimaging, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK. Electronic address: - - 2014
Data assimilation is a fundamental issue that arises across many scales in neuroscience - ranging from the study of single neurons using single electrode recordings to the interaction of thousands of neurons using fMRI. Data assimilation involves inverting a generative model that can not only explain observed data but also ...
Smallegange Isabel M IM Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, P.O. Box 94084, 1090 GB Amsterdam, The - - 2014
Abstract Global change alters the environment, including increases in the frequency of (un)favorable events and shifts in environmental noise color. However, how these changes impact the dynamics of populations, and whether these can be predicted accurately has been largely unexamined. Here we combine recently developed population modeling approaches and theory ...
Randall Lisa L Department of Physics, Harvard University, Cambridge, Massachusetts 02138, - - 2014
Although statistical evidence is not overwhelming, possible support for an approximately 35×106  yr periodicity in the crater record on Earth could indicate a nonrandom underlying enhancement of meteorite impacts at regular intervals. A proposed explanation in terms of tidal effects on Oort cloud comet perturbations as the Solar System passes through ...
Kent Rafi R Department of Plant Sciences, University of Cambridge Downing Street, Cambridge, CB23EA, U.K ; Department of Civil and Environmental Engineering, The Technion - Israel Institute of Technology Haifa, 32000, - - 2014
Global patters of species distributions and their underlying mechanisms are a major question in ecology, and the need for multi-scale analyses has been recognized. Previous studies recognized climate, topography, habitat heterogeneity and disturbance as important variables affecting such patterns. Here we report on analyses of species composition - environment relationships ...
Ding Yin Y Department of Electrical and Computer Engineering, Polytechnic Institute of New York University, Brooklyn, NY, - - 2014
Spectral-domain Optical coherence tomography (OCT) has shown remarkable utility in the study of retinal disease and has helped to characterize the fovea in Parkinson disease (PD) patients. We developed a detailed mathematical model based on raw OCT data to allow differentiation of foveae of PD patients from healthy controls. Of the ...
Wang Yong Y State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Department of Chemistry, Nanchang University, Nanchang 330031, - - 2014
A novel combined near- and mid-infrared (NIR and MIR) spectroscopic method has been researched and developed for the analysis of complex substances such as the Traditional Chinese Medicine (TCM), Illicium verum Hook. F. (IVHF), and its noxious adulterant, Iuicium lanceolatum A.C. Smith (ILACS). Three types of spectral matrix were submitted ...
Tao Jili J Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, PR China. Electronic address: - - 2014
The paper is concerned with an overall convergent nonlinear model predictive control design for a kind of nonlinear mechatronic drive systems. The proposed nonlinear model predictive control results in the improvement of regulatory capacity for reference tracking and load disturbance rejection. The design of the nonlinear model predictive controller consists ...
Stráník Adam A Department of Circuit Theory, Faculty of Electrical Engineering, Czech Technical University in Prague, Prague, Czech Republic. Electronic address: - - 2014
The purpose of this study was to classify objectively breathiness in continuous speech according to a subjective evaluation of voice based on the GRBAS scale. A retrospective, experimental study. A total of 593 records with read text were twice evaluated by five experts according to the GRBAS scale within two ...
Liu Junmin J Imaging Research Laboratories, Robarts Research Institute, University of Western Ontario, London, - - 2014
To develop and evaluate a local frequency shift (LFS) mapping method specifically designed for multi-echo acquisitions and multi-channel receive coils. The proposed method uses the pixel-by-pixel inter-echo variance (IEV) as a weighting factor during channel-combination. Five healthy volunteers were scanned at 7 T. The IEV-weighted method was quantitatively compared to ...
McGibbon Robert Treiman - - 2014
Markov state models provide a powerful framework for the analysis of biomolecular conformation dynamics in terms of their metastable states and transition rates. These models provide both a quantitative and comprehensible description of the long-timescale dynamics of large molecular dynamics with a Master equation, and have been successfully used to ...
Salvo Deborah D Nutrition and Health Sciences Program, Graduate Division of Biological and Biomedical Sciences, Emory University, Atlanta, - - 2014
There is little understanding about which sets of environmental features could simultaneously predict intensity-specific leisure-time physical activity (LTPA) among Brazilians. The objectives were to identify the environmental correlates for intensity-specific LTPA, and to build the best-fit linear models to predict intensity-specific LTPA among adults of Curitiba, Brazil. Cross sectional study ...
Sasaki Jeffer Eidi JE Department of Kinesiology, University of Massachusetts, Amherst, - - 2014
The purpose of this study was to examine the accuracy of the Fitbit Wireless Activity Tracker® in assessing energy expenditure (EE) for different activities. Twenty participants (10 males, 10 females) wore the Fitbit Classic Wireless Activity Tracker® on the hip and the Oxycon Mobile® portable metabolic system (criterion). Participants performed ...
Fukaya Keiichi K The Institute of Statistical Mathematics, 10-3 Midoricho, Tachikawa, Tokyo, 190-8562, - - 2014
1. Explanations for why population dynamics vary across the range of a species reflect two contrasting hypotheses: (1) temporal variability of populations is larger in the centre of the range compared to the margins because overcompensatory density dependence destabilizes population dynamics, and (2) population variability is larger near the margins, ...
Thomas Felicity - - 2014
The metabolism of critically ill patients evolves dynamically over time. Post critical insult, levels of counter-regulatory hormones are significantly elevated, but decrease rapidly over the first 12-48 hours in the intensive care unit (ICU). These hormones have a direct physiological impact on insulin sensitivity (SI). Understanding the variability of SI ...
Lin Chin-Feng CF Department of Electrical Engineering, National Taiwan Ocean University, Keelung, Taiwan, Republic of China, - - 2014
In the paper, we use the Microsoft Visual Studio Development Kit and C# programming language to implement a chaos-based electroencephalogram (EEG) encryption system involving three encryption levels. A chaos logic map, initial value, and bifurcation parameter for the map were used to generate Level I chaos-based EEG encryption bit streams. ...
Froňka A A National Radiation Protection Institute, Prague, Czech - - 2014
Recently, the role of energy savings in indoor air quality deterioration has been extensively emphasised, predominantly in the context of significant air exchange rate reduction as a result of home energy retrofits. In case of refurbishment of existing buildings, the effect of energy-efficient technologies on indoor radon concentration is considerably ...
Lee Donghwan D 1Department of Pharmacology, Yonsei University College of Medicine, Seoul, Korea 2Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul, - - 2014
The background of this study was (i) to examine factors influencing cilostazol pharmacokinetics by developing a population model incorporating diurnal variation as well as other covariate effects, and (ii) to assess the feasibility of applying the developed model to determine the optimal dosing times. Data obtained from a cilostazol pharmacokinetic ...
Aschard Hugues H Program in Genetic Epidemiology and Statistical Genetics, Department of Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA. Electronic address: - - 2014
Many human traits are highly correlated. This correlation can be leveraged to improve the power of genetic association tests to identify markers associated with one or more of the traits. Principal component analysis (PCA) is a useful tool that has been widely used for the multivariate analysis of correlated variables. ...
Nordmann Emily E School of Psychology, William Guild Building, University of Aberdeen, Aberdeen AB24 2UB, UK. Electronic address: - - 2014
To date, there have been several attempts made to build a database of normative data for English idiomatic expressions (e.g., Libben & Titone, 2008; Titone & Connine, 1994), however, there has been some discussion in the literature as to the validity and reliability of the data obtained, particularly for decomposability ...
Garg Harish H School of Mathematics and Computer Applications, Thapar University Patiala, Patiala 147004, India. Electronic address: - - 2014
The present work investigates the various reliability parameters of industrial systems in terms of membership and non-membership functions by using α-cut and the weakest t-norm based arithmetic operations on triangular intuitionistic fuzzy sets. As the available information about the constituent components of the system is most of the time imprecise, ...
D'Archivio Angelo Antonio AA Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, Via Vetoio, 67010 Coppito, L'Aquila, Italy. Electronic address: - - 2014
In the present work, the retention time (RT) of acylcarnitines, collected by ultra-performance liquid-chromatography after formation of butyl esters, is modelled by quantitative structure-retention relationship (QSRR) method. The investigated set consists of free carnitine and 46 different acylcarnitines, including the isomers commonly monitored in screening metabolic disorders. To describe the ...
Elkhoudary Mahmoud M MM Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Sinai University, El Arish, North Sinai, - - 2014
Metronidazole (MNZ) is a widely used antibacterial and amoebicide drug. Therefore, it is important to develop a rapid and specific analytical method for the determination of MNZ in mixture with Spiramycin (SPY), Diloxanide (DIX) and Cliquinol (CLQ) in pharmaceutical preparations. This work describes simple, sensitive and reliable six multivariate calibration ...
Riva F F DEI - Department of Electrical, Electronic, and Information Engineering 'Guglielmo Marconi', University of Bologna, via Venezia 52, 47521 Cesena (FC), Italy. Electronic address: - - 2014
Several methods are proposed in the literature for the quantification of gait variability/stability from trunk accelerations. Since outputs can be influenced by implementation differences, reliability assessment and standardization of implementation parameters are still an issue. The aim of this study is to assess the minimum number of required strides and ...
St Amand Melissa M MM Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware, - - 2014
N-linked glycan distribution affects important end-use characteristics as the bioactivity and efficacy of many therapeutic proteins, (including monoclonal antibodies), in vivo. Yet, obtaining desired glycan distributions consistently during batch-to-batch production can be challenging for biopharmaceutical manufacturers. While an appropriately implemented on-line glycosylation control strategy during production can help to ensure ...
Infantolino Benjamin W BW Division of Science, Pennsylvania State University, PO Box 7009, Berks Campus, Tulpehocken Road, Reading, PA, 19610, USA, - - 2014
Subject specific musculoskeletal models typically base some or all of their parameters on a source other than the subject being modeled. Evidence demonstrates that cadaveric measurements do not always scale appropriately to every subject, yet many musculoskeletal models still rely heavily on cadaveric based data. This study focused on the ...
Riaño Barros Daniela A DA Centre for Neuroscience, Department of Medicine, Imperial College London, London, UK; MRC Clinical Sciences Centre Hammersmith Hospital, London, - - 2014
Endocannabinoids are involved in normal cognition, and dysfunction in cannabinoid-receptor-mediated neurotransmission has been suggested in a variety of neurological and psychiatric pathologies. The type 1 cannabinoid receptor (CB1) is widely expressed in the human central nervous system. The objective of this study was to quantify the test-retest reproducibility of measures ...
Fernández-Sánchez Jesús J Departament de Matemàtica Aplicada I, Universitat Politècnica de Catalunya, Barcelona, Spain, - - 2014
Continuous-time Markov chains are a standard tool in phylogenetic inference. If homogeneity is assumed, the chain is formulated by specifying time-independent rates of substitutions between states in the chain. In applications, there are usually extra constraints on the rates, depending on the situation. If a model is formulated in this ...
Yang Y-M YM Department of Orthodontics, School of Dentistry, Dental Research Institute, Pusan National University, Yangsan, South - - 2014
This study aimed to determine the viability of using axial cervical vertebrae (ACV) as biological indicators of skeletal maturation and to build models that estimate ossification level with improved explanatory power over models based only on chronological age. The study population comprised 74 female and 47 male patients with available ...
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