Results 451  500 of 3247  
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Steyn R R Department of Nuclear Medicine, Groote Schuur Hospital, University of Cape Town, South   2014
To determine how two software packages, supplied by Siemens and Hermes, for processing gated blood pool (GBP) studies should be used in our department and whether the use of different cameras for the acquisition of raw data influences the results. The study had two components. For the first component, 200 ...


Huan Mei M MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044,   2014
The paper proposed a model for estimating waiting endurance times of electric twowheelers at signalized intersections using survival analysis method. Waiting duration times were collected by video cameras and they were assigned as censored and uncensored data to distinguish between normal crossing and redlight running behavior. A Cox proportional hazard ...


Shortterm forecasting of taiwanese earthquakes using a universal model of fusionfission processes.
Cheong Siew Ann SA 1] Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Republic of Singapore [2] Complexity Program, Nanyang Technological University, 60 Nanyang View, Singapore 639673, Republic of   2014
Predicting how large an earthquake can be, where and when it will strike remains an elusive goal in spite of the everincreasing volume of data collected by earth scientists. In this paper, we introduce a universal model of fusionfission processes that can be used to predict earthquakes starting from catalog ...


Russo Danilo D Wildlife Research Unit, Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, Napoli, Italy; School of Biological Sciences, University of Bristol, Bristol, United   2014
Competition may lead to changes in a species' environmental niche in areas of sympatry and shifts in the niche of weaker competitors to occupy areas where stronger ones are rarer. Although mainland Mediterranean (Rhinolophus euryale) and Mehely's (R. mehelyi) horseshoe bats mitigate competition by habitat partitioning, this may not be ...


Güthlin Denise D Chair of Wildlife Ecology and Management, University of Freiburg, Freiburg, BadenWürttemberg,   2014
Due to time and financial constraints indices are often used to obtain landscapescale estimates of relative species abundance. Using two different field methods and comparing the results can help to detect possible bias or a non monotonic relationship between the index and the true abundance, providing more reliable results. We ...


Feischl Michael M Institute for Analysis and Scientific Computing, Vienna University of Technology, Wiedner Hauptstr. 810/E101/4, 1040 Wien,   2014
In the context of the adaptive finite element method (FEM), ZZerror estimators named after Zienkiewicz and Zhu (1987) [52] are mathematically wellestablished and widely used in practice. In this work, we propose and analyze ZZtype error estimators for the adaptive boundary element method (BEM). We consider weakly singular and hypersingular ...


Caldarelli Guido G IMT Institute for Advanced Studies, Lucca, Italy; Istituto dei Sistemi Complessi (ISC), Department of Physics, Università "Sapienza", Roma, Italy; London Institute for Mathematical Sciences, London, United Kingdom; Linkalab, Complex Systems Computational Laboratory, Cagliari,   2014
In this paper we present an analysis of the behavior of Italian Twitter users during national political elections. We monitor the volumes of the tweets related to the leaders of the various political parties and we compare them to the elections results. Furthermore, we study the topics that are associated ...


Wang Wei W Key Lab of GIScience, Education Ministry of China, East China Normal University, Shanghai,   2014
The pixel purity index (PPI) and twodimensional (2D) scatter plots are two popular techniques for endmember extraction in remote sensing spectral mixture analysis, yet both suffer from one major drawback, that is, the selection of a final set of endmembers has to endure a cumbersome process of iterative visual inspection ...


Likhitrakarn Natdanai N Animal Systematics Research Unit, Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.; Email:   2014
At the present, the millipede fauna of Laos comprises only 34 species from 20 genera, 13 families and 7 orders. These counts certainly represent but a minor fraction of the country's real diversity of Diplopoda even at the ordinal level, let alone at lower ones. Based on the available information ...


Wang Jimin J College of Computer & Information, Hohai University, Nanjing 210098,   2014
Multivariate time series (MTS) datasets are very common in various financial, multimedia, and hydrological fields. In this paper, a dimensioncombination method is proposed to search similar sequences for MTS. Firstly, the similarity of singledimension series is calculated; then the overall similarity of the MTS is obtained by synthesizing each of ...


AUTOMUTE 2.0: A Portable Framework with Enhanced Capabilities for Predicting Protein Functional ...
Masso Majid M Laboratory for Structural Bioinformatics, School of Systems Biology, George Mason University, Manassas, VA 20110,   2014
The AUTOMUTE 2.0 standalone software package includes a collection of programs for predicting functional changes to proteins upon single residue substitutions, developed by combining structurebased features with trained statistical learning models. Three of the predictors evaluate changes to protein stability upon mutation, each complementing a distinct experimental approach. Two additional ...


Daneshmand Saeed S Department of Geomatics Engineering, University of Calgary, Schulich School of Engineering, Position Location and Navigation (PLAN) Group, 2500 University Drive, N.W., Calgary, AB T2N 1N4, Canada.   2014
The use of global navigation satellite system (GNSS) antenna arrays for applications such as interference countermeasure, attitude determination and signaltonoise ratio (SNR) enhancement is attracting significant attention. However, precise antenna array calibration remains a major challenge. This paper proposes a new method for calibrating a GNSS antenna array using live ...


Bender Mariana G MG Departamento de Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, SC,   2014
In the last decades, a number of studies based on historical records revealed the diversity loss in the oceans and humaninduced changes to marine ecosystems. These studies have improved our understanding of the human impacts in the oceans. They also drew attention to the shifting baseline syndrome and the importance ...


Jaber Abobaker M AM School of Mathematical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang,   2014
This paper mainly forecasts the daily closing price of stock markets. We propose a twostage technique that combines the empirical mode decomposition (EMD) with nonparametric methods of local linear quantile (LLQ). We use the proposed technique, EMDLLQ, to forecast two stock index time series. Detailed experiments are implemented for the ...


Rhodes Jonathan R JR School of Geography, Planning and Environmental Management, The University of Queensland, Brisbane, Queensland, Australia; ARC Centre of Excellence for Environmental Decisions, The University of Queensland, Brisbane, Queensland, Australia; NERP Environmental Decisions Hub, The University of Queensland, Brisbane, Queensland,   2014
Roads and vehicular traffic are among the most pervasive of threats to biodiversity because they fragmenting habitat, increasing mortality and opening up new areas for the exploitation of natural resources. However, the number of vehicles on roads is increasing rapidly and this is likely to continue into the future, putting ...


Chi Peter B PB Department of Statistics, California Polytechnic State University , San Luis Obispo, CA ,   2014
We examine heritability estimation of an ordinal trait for osteoarthritis, using a population of pigtailed macaques from the Washington National Primate Research Center (WaNPRC). This estimation is nontrivial, as the data consist of ordinal measurements on 16 intervertebral spaces throughout each macaque's spinal cord, with many missing values. We examine ...


Horsley Alex A Institute of Inflammation and Repair, University of Manchester, Manchester, United Kingdom; Manchester Adult Cystic Fibrosis Centre, University Hospital of South Manchester, Manchester, United   2014
The Innocor device contains a highly sensitive photoacoustic gas analyser that has been used to perform multiple breath washout (MBW) measurements using very low concentrations of the tracer gas SF6. Use in smaller subjects has been restricted by the requirement for a gas analyser response time of <100 ms, in ...


Liu Yang Y 0000000182180196 School of Mathematical Sciences, Inner Mongolia University, Hohhot 010021,   2014
A kind of new mixed element method for timefractional partial differential equations is studied. The Caputofractional derivative of time direction is approximated by twostep difference method and the spatial direction is discretized by a new mixed element method, whose gradient belongs to the simple (L (2)(Ω)(2)) space replacing the complex ...


Ding Risheng R Center for Agricultural Water Research in China, China Agricultural University, Beijing,   2014
The dualsource ShuttleworthWallace model has been widely used to estimate and partition crop evapotranspiration (λET). Canopy stomatal conductance (Gsc), an essential parameter of the model, is often calculated by scaling up leaf stomatal conductance, considering the canopy as one single leaf in a socalled "bigleaf" model. However, Gsc can be ...


Bará Salvador   2014
In order to work in a consistent way with Zernike aberration coefficients estimated in different pupils, it is necessary to refer them to a common pupil size. Two standard approaches can be used to that end: to rescale algebraically the coefficients estimated in the original pupil or to refit them ...


Van Leemput Koen   2014
In this paper we analyze the properties of the wellknown segmentation fusion algorithm STAPLE, using a novel inference technique that analytically marginalizes out all model parameters. We demonstrate both theoretically and empirically that when the number of raters is large, or when consensus regions are included in the model, STAPLE ...


Fu YiGe YG Department of Automation, Tsinghua University, Beijing 100084, China.   2014
As the use of camera networks has expanded, camera placement to satisfy some quality assurance parameters (such as a good coverage ratio, an acceptable resolution constraints, an acceptable cost as low as possible, etc.) has become an important problem. The discrete camera deployment problem is NPhard and many heuristic methods ...


Hilkhuysen Gaston G Department of Speech, Language and Hearing Sciences, University College London, 2 Wakefield Street, London WC1N 1PF, United   2014
Using the data presented in the accompanying paper [Hilkhuysen et al., J. Acoust. Soc. Am. 131, 531539 (2012)], the ability of six metrics to predict intelligibility of speech in noise before and after noise suppression was studied. The metrics considered were the Speech Intelligibility Index (SII), the fractional Articulation Index ...


Hoque Faika F 0000000156411229 School of Electrical Engineering, University of Ulsan, Ulsan 680749, Republic of   2014
This paper proposes an effective warning message forwarding scheme for cooperative collision avoidance. In an emergency situation, an emergencydetecting vehicle warns the neighbor vehicles via an emergency warning message. Since the transmission range is limited, the warning message is broadcast in a multihop manner. Broadcast packets lead two challenges to ...


Gao Wei W School of Information Science and Technology, Yunnan Normal University, Kunming 650500,   2014
A graph G is called a fractional (g, f)deleted graph if G  {e} admits a fractional (g, f)factor for any e ∈ E(G). A graph G is called a fractional (g, f, n)critical deleted graph if, after deleting any n vertices from G, the resulting graph is still a ...


Aly Sharif S SS Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, 18830 Road 112, Tulare, CA 93274 USA ; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, One Shields Avenue, Davis, CA 95616   2014
The Intraclass Correlation Coefficient (ICC) is commonly used to estimate the similarity between quantitative measures obtained from different sources. Overdispersed data is traditionally transformed so that linear mixed model (LMM) based ICC can be estimated. A common transformation used is the natural logarithm. The reliability of environmental sampling of fecal ...


Rosso Abbey A National Park Service, Winthrop, Washington, United States of   2014
Terrestrial lichen biomass is an important indicator of forage availability for caribou in northern regions, and can indicate vegetation shifts due to climate change, air pollution or changes in vascular plant community structure. Techniques for estimating lichen biomass have traditionally required destructive harvesting that is painstaking and impractical, so we ...


Smith Jeremy D JD School of Sport & Exercise Science, University of Northern Colorado;   2014
The purpose of this study was twofold: (1) demonstrate a technique that can be used to directly estimate the inertial properties of a belowknee prosthesis, and (2) contrast the effects of the proposed technique and that of using intact limb inertial properties on joint kinetic estimates during walking in unilateral, ...


Duda Jeffrey T JT Penn Image Computing and Science Laboratory, Department of Radiology, University of Pennsylvania Philadelphia, PA,   2014
Recent interest in human brain connectivity has led to the application of graph theoretical analysis to human brain structural networks, in particular white matter connectivity inferred from diffusion imaging and fiber tractography. While these methods have been used to study a variety of patient populations, there has been less examination ...


Li Yingsong Y 0000000224506028 Graduate School of Engineering, Kochi University of Technology, Kamishi 7828502,   2014
To make use of the sparsity property of broadband multipath wireless communication channels, we mathematically propose an l p normconstrained proportionate normalized leastmeansquare (LPPNLMS) sparse channel estimation algorithm. A general l p norm is weighted by the gain matrix and is incorporated into the cost function of the proportionate normalized ...


Qu Zhaowei Z College of Transportation, Jilin University, Changchun 130022,   2014
To estimate the capacity of roundabouts more accurately, the priority rank of each stream is determined through the classification technique given in the Highway Capacity Manual 2010 (HCM2010), which is based on macroscopical analysis of the relationship between entry flow and circulating flow. Then a conflict matrix is established using ...


Yan Luchun L School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Xueyuan Road 30, Haidian District, Beijing 100083, China.   2014
A novel odor interaction model was proposed for binary mixtures of benzene and substituted benzenes by a partial differential equation (PDE) method. Based on the measurement method (tangentintercept method) of partial molar volume, original parameters of corresponding formulas were reasonably displaced by perceptual measures. By these substitutions, it was possible ...


Charaudeau Segolene S INSERM, UMR S 707, Paris, France ; Université Pierre et Marie Curie  Paris 6, Paris, France ; Institut Jacques Monod, Paris, France ; Université Denis Diderot, Paris,   2014
Commuting data is increasingly used to describe population mobility in epidemic models. However, there is little evidence that the spatial spread of observed epidemics agrees with commuting. Here, using data from 25 epidemics for influenzalike illness in France (ILI) as seen by the Sentinelles network, we show that commuting volume ...


Kume Keiichiro K 0000000204444739 Third Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, 11 Iseigaoka, Yahatanishiku, Kitakyushu 8078555,   2014
Background. Although the size of colon polyps is an important risk factor for colorectal cancer, a standardized measurement technique has yet to be determined. In clinical practice, most endoscopists estimate polyp size by uncertain visual estimation; however, colonoscopic polypectomy is indicated for adenomatous polyps more than 5 mm in diameter. We ...


Raknes Guttorm G National Centre for Emergency Primary Health Care, Uni Health, Uni Research, Bergen,   2014
We describe a method that uses crowdsourced postcode coordinates and Google maps to estimate average distance and travel time for inhabitants of a municipality to a casualty clinic in Norway. The new method was compared with methods based on population centroids, median distance and town hall location, and we used ...


Yang Yingxiang Y Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139,   2014
The estimation of commuting flows at different spatial scales is a fundamental problem for different areas of study. Many current methods rely on parameters requiring calibration from empirical trip volumes. Their values are often not generalizable to cases without calibration data. To solve this problem we develop a statistical expression ...


Azmi Aqil M AM Department of Computer Science, College of Computer & Information Sciences, King Saud University, Riyadh, Saudi   2014
A major task in computational biology is the discovery of short recurring string patterns known as motifs. Most of the schemes to discover motifs are either stochastic or combinatorial in nature. Stochastic approaches do not guarantee finding the correct motifs, while the combinatorial schemes tend to have an exponential time ...


Fateen SeifEddeen K SE Department of Chemical Engineering, Cairo University, Giza 12316,   2014
The search for reliable and efficient global optimization algorithms for solving phase stability and phase equilibrium problems in applied thermodynamics is an ongoing area of research. In this study, we evaluated and compared the reliability and efficiency of eight selected natureinspired metaheuristic algorithms for solving difficult phase stability and phase ...


Méndez I I Department of Medical Physics, Institute of Oncology Ljubljana, Zaloška cesta 2, Ljubljana 1000,   2014
Purpose: Different multichannel methods for film dosimetry have been proposed in the literature. Two of them are the weighted mean method and the method put forth by Micke et al. ["Multichannel film dosimetry with nonuniformity correction," Med. Phys. 38, 25232534 (2011)] and Mayer et al. ["Enhanced dosimetry procedures and assessment ...


Moutselos Konstantinos K 0000000267598540 Department of Computer Science and Biomedical Informatics, University of Thessaly, Papasiopoulou 24, 35100 Lamia,   2014
In this work the effects of simple imputations are studied, regarding the integration of multimodal data originating from different patients. Two separate datasets of cutaneous melanoma are used, an image analysis (dermoscopy) dataset together with a transcriptomic one, specifically DNA microarrays. Each modality is related to a different set of ...


Rhee MooYong MY Cardiovascular Center, Dongguk University Ilsan Hospital, 27 Donggukro, Ilsandonggu, Goyangsi, Gyeonggi 410773, Korea.   2014
The present study evaluated the reliability of equations using spot urine (SU) samples in the estimation of 24hour urine sodium excretion (24HUNa). Equations estimating 24HUNa from SU samples were derived from firstmorning SU of 101 participants (52.4 ± 11.1 years, range 2470 years). Equations developed by us and other investigators ...


Ge Tian T Centre for Computational Systems Biology, School of Mathematical Sciences, Fudan University, Shanghai 200433, China & Department of Computer Science, University of Warwick, Coventry CV4 7AL, UK ; Department of Statistics & Warwick Manufacturing Group, University of Warwick, Coventry CV4 7AL,   2014
Magnetic resonance imaging (MRI) plays a vital role in the scientific investigation and clinical management of multiple sclerosis. Analyses of binary multiple sclerosis lesion maps are typically "mass univariate" and conducted with standard linear models that are ill suited to the binary nature of the data and ignore the spatial ...


Kerns James R JR Department of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.   2014
The multileaf collimator (MLC) is a critical component to accurate intensitymodulated radiotherapy (IMRT) delivery. This study examined MLC positional accuracy via MLC logs from Varian machines from six institutions and three delivery techniques to evaluate typical positional accuracy and treatment and mechanical parameters that affect accuracy. Typical accuracy achieved was ...


Li Yanling Y Department of Civil and Environmental Engineering, University of Hawaii at Manoa, 2540 Dole Street, Holmes Hall 383, Honolulu, Hawaii 96822, USA Email:   2014
Green roofs reduce runoff from impervious surfaces in urban development. This paper reviews the technical literature on green roof hydrology. Laboratory experiments and field measurements have shown that green roofs can reduce stormwater runoff volume by 30 to 86%, reduce peak flow rate by 22 to 93% and delay the ...


  2014
[This corrects the article DOI: 10.1371/journal.pone.0089642.].


VázquezAlcocer Alan A Centro de Investigación en Matemáticas, Guanajuato, Guanajuato,   2014
One of the most important steps in biomedical longitudinal studies is choosing a good experimental design that can provide high accuracy in the analysis of results with a minimum sample size. Several methods for constructing efficient longitudinal designs have been developed based on power analysis and the statistical model used ...


Boulton Chris A CA Earth System Science, College of Life and Environmental Sciences, Laver Building (Level 7), University of Exeter, Exeter EX4 4QE,   2014
The Atlantic Meridional Overturning Circulation (AMOC) exhibits two stable states in models of varying complexity. Shifts between alternative AMOC states are thought to have played a role in past abrupt climate changes, but the proximity of the climate system to a threshold for future AMOC collapse is unknown. Generic early ...


Benites Fernando F Department of Computer and Information Science, University of Konstanz, Konstanz,   2014
The constantly increasing volume and complexity of available biological data requires new methods for their management and analysis. An important challenge is the integration of information from different sources in order to discover possible hidden relations between already known data. In this paper we introduce a data mining approach which ...


Liu Jingyuan J Assistant Professor of Wang Yanan Institute for Studies in Economics and Department of Statistics and Fujian Key Laboratory of Statistical Science, Xiamen University,   2014
This paper is concerned with feature screening and variable selection for varying coefficient models with ultrahigh dimensional covariates. We propose a new feature screening procedure for these models based on conditional correlation coefficient. We systematically study the theoretical properties of the proposed procedure, and establish their sure screening property and ...


Tange Julie I JI Department of Laboratory Medicine and Pathology, Mayo Clinic Rochester,   2013
Warfarin dosing relies on accurate measurements of international normalized ratio (INR), which is calculated from the prothrombin time (PT), International Sensitivity Index international sensitivity index (ISI) of the thromboplastin, and the geometric mean of normal PT (MNPT). However, ISI assignments of certain reagent/instrument combinations are frequently unavailable, especially when the ...


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