Results 351  400 of 2870  
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Burigana Luigi   2013
Given a set of points on the plane and an assignment of values to them, an optimal linear partition is a division of the set into two subsets which are separated by a straight line and maximally contrast with each other in the values assigned to their points. We present ...


Petoukhov Maxim V   2013
Recent renaissance of smallangle Xray scattering (SAXS) made this technique a streamline tool for lowresolution structural characterization of biological macromolecules in solution. The major limitation of existing methods for reconstructing threedimensional (3D) models from SAXS is imposed by the requirement of solute monodispersity. We present a novel approach that couples ...


Achterberg Hakim C   2013
Previous studies have shown that hippocampal volume is an early marker for dementia. We investigated whether hippocampal shape characteristics extracted from MRI scans are predictive for the development of dementia during follow up in subjects who were nondemented at baseline. Furthermore, we assessed whether hippocampal shape provides additional predictive value ...


Nahhas Ramzi W   2013
Abstract Background: Evaluation of skeletal maturity provides clinicians and researchers a window into the developmental progress of the skeleton. The FELS method for maturity assessment provides a point estimate and standard error based on 98 skeletal indicators. Aim: This paper outlines the statistical methodology used by the original FELS method ...


Smith Benjamin M   2013
Quantitative computed tomography (QCT) can provide reliable and valid measures of lung structure and volumes. Similar to lung function measured by spirometry, lung measures obtained by QCT vary by demographic and anthropomorphic factors including sex, race/ethnicity, and height in asymptomatic nonsmokers. Hence, accounting for these factors is necessary to define ...


Ruan M Z C   2013
The major complaint of Osteoarthritis (OA) patients is pain. However, due to the nature of clinical studies and the limitation of animal studies, few studies have linked function impairment and behavioral changes in OA animal models to cartilage loss and histopathology. Our objective was to study surrogate markers of functional ...


Kim Jeehyoung   2013
Calculating the sample size is essential to reduce the cost of a study and to prove the hypothesis effectively. Referring to pilot studies and previous research studies, we can choose a proper hypothesis and simplify the studies by using a website or Microsoft Excel sheet that contains formulas for calculating ...


Ferreira Lara N   2013
The sixdimensional health state short form (SF6D) was designed to be derived from the shortform 36 health survey (SF36). The purpose of this research was to compare the SF6D index values generated from the SF36 (SF6DSF36) with those obtained from the SF6D administered as an independent instrument (SF6DInd). The goal ...


Hull Maury   2013
An accurate axisfinding technique is required to measure any clinically important changes from normal caused by total knee arthroplasty in the flexionextension (FE) and longitudinal rotation (LR) axes of the tibiofemoral joint. In a previous paper, we computationally determined how best to design and use an instrumented spatial linkage (ISL) ...


Zhang Bo   2013
Spectral peak overlapping is a basic problem in analytical data processing of laserinduced breakdown spectroscopy (LIBS). Curve fitting is the typical method of resolving overlapped peaks. For preventing ambiguous fitting, appropriate initial values must be known. The aim of this work was to present a method that could be used ...


Jiang Haina   2013
Based on the realistic property of the pore structure in coal, we established a fractal theory based Fractional diffusion model (FFDModel) by introducing the fractal dimension df to the Fick's classical model and changing the firstorder partial differential equation about time into a υ fractionalorder partial differential equation. Then, the ...


Sweeney Sean M   2013
The fractal dimension of minimal spanning trees on percolation clusters is estimated for dimensions d up to d=5. A robust analysis technique is developed for correlated data, as seen in such trees. This should be a robust method suitable for analyzing a wide array of randomly generated fractal structures. The ...


Wimmer Jason   2013
Acoustic sensors can be used to estimate species richness for vocal species such as birds. They can continuously and passively record large volumes of data over extended periods. These data must subsequently be analyzed to detect the presence of vocal species. Automated analysis of acoustic data for large numbers of ...


Gregory T Ryan   2013
A study was undertaken to evaluate both a preexisting method and a newly proposed approach for the estimation of nuclear genome sizes in arthropods. First, concerns regarding the reliability of the wellestablished method of flow cytometry relating to impacts of rearing conditions on genome size estimates were examined. Contrary to ...


Guerrier Stéphane   2013
This article presents a new estimation method for the parameters of a time series model. We consider here composite Gaussian processes that are the sum of independent Gaussian processes which, in turn, explain an important aspect of the time series, as is the case in engineering and natural sciences. The ...


Mărgăritescu Irina   2013
Performance of qualitative microbiological measurement methods where the results are either "O" (microorganism not detected) or "1" (microorganism detected) is described by their probability of detection (POD) function, i.e., the POD as a function of the level of contamination of the sample, expressed as CFU/g or CFU/mL, or by the ...


Zeng Ming M Aix Marseille Université, Marseilles,   2013
In trickling filters for wastewater treatment, hydrodynamic behaviour is affected by the growth of biofilm on the porous medium. Therefore, modelling hydrodynamic behaviour is necessary and efficient to predict the biodegradation of pollutants. In this study, laboratoryscale trickling filters were filled with two different porous media (glass beads and plastic ...


Adriaenssens N   2013
There is no consensus on the definition of Breast Cancer Related Lymphedema of the arm (BCRL) because there are no agreed standards in measurement methods and diagnostic criteria. The main objective of this study is to compare mobile infrared optoelectronic volumetry with a Perometer with two commonly used methods for ...


Lou Yifei Y School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.   2013
An important problem of neuroimaging data analysis for traumatic brain injury (TBI) is the task of coregistering MR volumes acquired using distinct sequences in the presence of widely variable pixel movements which are due to the presence and evolution of pathology. We are motivated by this problem to design a ...


Stuckey Erin M   2013
Evaluating the effectiveness of malaria control interventions on the basis of their impact on transmission is increasingly important as countries move from malaria control to preelimination programs. Mathematical modeling can examine relationships between malaria indicators, allowing translation of easily measured data into measures of transmission, and addressing key concerns with ...


Cho CW   2013
In this study we present prediction models for estimating in silico the cationic hydrophobicity and the cytotoxicity (log [1/EC50]) of ionic liquids (ILs) towards the Leukemia rat cell line (IPC81), the marine bacterium Vibrio fischeri and the limnic green algae Scenedesmus vacuolatus using linear free energy relationship (LFER) descriptors computed ...


Liu Xun   2013
Accurate and precise estimates of glomerular filtration rate (GFR) are essential for clinical assessments, and many methods of estimation are available. We developed a radial basis function (RBF) network and assessed the performance of this method in the estimation of the GFRs of 207 patients with type2 diabetes and CKD. ...


SorekHamer M   2013
Satellite observations may improve the areal coverage of particulate matter (PM) air quality data that nowadays is based on surface measurements. Three statistical methods for retrieving daily PM2.5 concentrations from satellite products (MODISAOD, OMIAAI) over the San Joaquin Valley (CA) are compared  Linear Regression (LR), Generalized Additive Models (GAM), ...


Feller David   2013
The effectiveness of the recently developed, explicitly correlated coupled cluster method CCSD(T)F12b is examined in terms of its ability to reproduce atomization energies derived from complete basis set extrapolations of standard CCSD(T). Most of the standard method findings were obtained with augccpV7Z or augccpV8Z basis sets. For a few homonuclear ...


Ozaki Masahiro M Department of Applied Physics, Okayama University of Science, Okayama,   2014
We propose a new apparatus and method to estimate accurate urea reduction ratio without influence of any rebound. For this purpose, we have developed an improved version of a chemiluminescencebased urea sensor capable of measuring urea concentration in spent dialysate (CD ) at 2min intervals. The correlation coefficient between the ...


Wirtz Tim   2013
Wishart random matrix theory is of major importance for the analysis of correlated time series. The distribution of the smallest eigenvalue for Wishart correlation matrices is particularly interesting in many applications. In the complex and in the real case, we calculate it exactly for arbitrary empirical eigenvalues, i.e., for fully ...


Sahu Patitapaban   2013
Estimation of radon emanation in uranium mines is given top priority to minimize the risk of inhalation exposure due to shortlived radon progeny. This paper describes the radon emanation studies conducted in the laboratory as well as inside an operating underground uranium mine at Jaduguda, India. Some of the important ...


Elvik Rune   2013
Safetyinnumbers denotes a nonlinear relationship between exposure (traffic volume) and the number of accidents, characterised by declining risk as traffic volume increases. There is safetyinnumbers when the number of accidents increases less than proportional to traffic volume, e.g. a doubling of traffic volume is associated with less than a doubling ...


Deltombe R   2013
In order to conduct a comprehensive roughness analysis, around sixty 3D roughness parameters are created to describe most of the surface morphology with regard to specific functions, properties or applications. In this paper, a multiscale surface topography decomposition method is proposed with application to stainless steel (AISI 304), which is ...


Individualized Fetal Growth Assessment: Critical Evaluation of Key Concepts in the Specification ...
Deter Russell L   2013
Abstract Objectives: To characterize second and third trimester fetal growth using Individualized Growth Assessment methods in a larger cohort of fetuses with normal neonatal growth outcomes. Methods: A prospective longitudinal study of 119 pregnancies was performed from 18 weeks, MA, to delivery. Measurements of several 2D and 3D fetal growth ...


Kuen Cheung Ying   2013
In the planning of a dose finding study, a primary design objective is to maintain high accuracy in terms of the probability of selecting the maximum tolerated dose. While numerous dose finding methods have been proposed in the literature, concrete guidance on sample size determination is lacking. With a motivation ...


Scavia Donald   2013
For almost three decades, the relative size of the hypoxic region on the LouisianaTexas continental shelf has drawn scientific and policy attention. During that time, both simple and complex models have been used to explore hypoxia dynamics and to provide management guidance relating the size of the hypoxic zone to ...


Salahzadeh Zahra   2013
There are different methods to assess forward head posture (FHP) but the accuracy and discrimination ability of these methods are not clear. Here, we want to compare three postural angles for FHP assessment and also study the discrimination accuracy of three photogrammetric methods to differentiate groups categorized based on observational ...


Song W   2013
Absolute testing methods are commonly employed in surface metrology to calibrate the reference surface deviation and obtain the absolute deviation of the surface under test. A simple and reliable datareduction method of absolute shiftrotation method with rotational and translational measurements is presented here, which relies on the decomposition of the ...


van Alphen M J A   2013
Our aim was to develop a dynamic virtual model of the oral cavity and oropharynx so that we could incorporate patientspecific factors into the prediction of functional loss after advanced resections for oral cancer. After a virtual resection, functional consequences can be assessed, and a more substantiated decision about treatment ...


Gedik O Serdar   2013
In robotics and augmented reality applications, modelbased 3D tracking of rigid objects is generally required. With the help of accurate pose estimates, it is required to increase reliability and decrease jitter in total. Among many solutions of pose estimation in the literature, pure visionbased 3D trackers require either manual initializations ...


Brighton Charlotte   2013
Standalone 'lowcost' inertial measurement units (IMUs) could facilitate largescale studies into establishing minimal important differences (MID) for orthopaedic deficits (lameness) in horses. We investigated accuracy and limits of agreement (LoA) after correction of magnitudedependent differences of a standalone 6 degreeoffreedom IMU compared with an established IMUbased gait analysis system (MTx) ...


Mehta Hiren J   2013
An estimated 150,000 pulmonary nodules are identified each year; the number is likely to increase given the results of the National Lung Screening Trial. Decision tools are needed to help with management of such pulmonary nodules. We examined whether adding any of three novel functions of nodule volume improves the ...


Honório Thiago da Silva   2013
The aim of the present work was to use GastroPlus™ software for the prediction of pharmacokinetic profiles and in vitroin vivo correlation (IVIVC) as tools to optimize the development of new generic medications. GastroPlus™ was used to simulate the gastrointestinal compartment and was based on the advanced compartmental absorption and ...


Chen Renjie   2013
People typically spend most of their time indoors. We modeled the daily indoor PM10 concentrations of outdoor origin using a set of exposure parameters, including the fraction of residences with air conditionings (AC), the fraction of time that windows are closed when cooling occurs for buildings with AC, the fractions ...


Harris Robert C   2013
Gridbased solvers of the PoissonBoltzmann, PB, equation are routinely used to estimate electrostatic binding, ΔΔGel, and solvation, ΔGel, free energies. The accuracies of such estimates are subject to grid discretization errors from the finite difference approximation to the PB equation. Here, we show that the grid discretization errors in ΔΔGel ...


Luna Ana   2013
We investigate the iridescence exhibited by Ceroglossus suturalis beetles, which mostly live endemically in the southern end of South America. Two differently colored specimens have been studied. We observed and characterized the samples by different microscopy techniques, which revealed a multilayer structure within their cuticle. Using measured reflectance spectra as ...


Van Norman Ethan R   2013
This study examined the effect of baseline estimation on the quality of trend estimates derived from Curriculum Based Measurement of Oral Reading (CBMR) progress monitoring data. The authors used a linear mixed effects regression (LMER) model to simulate progress monitoring data for schedules ranging from 620 weeks for datasets with ...


Faber Gert S   2013
A novel method for assessing the accuracy of inertial/magnetic sensors is presented. The method, referred to as the "residual matrix" method, is advantageous because it decouples the sensor's error with respect to Earth's gravity vector (attitude residual error: pitch and roll) from the sensor's error with respect to magnetic north ...


Samavati Vahid   2013
Optimization for retention and partition coefficient of ethyl acetate in emulsion model systems was investigated using response surface methodology in this paper. The effects of emulsion model ingredients, tragacanth gum (TG) (0.51wt%), whey protein isolate (WPI) (24wt%) and oleic acid (510%, v/v) on retention and partition coefficient of ethyl acetate ...


Convertino Victor A   2013
Trauma patients with 'compensated' internal hemorrhage may not be identified using standard medical monitors until signs of shock appear, at which point it may be difficult or too late to pursue lifesaving interventions. We tested the hypothesis that a novel machinelearning model called the Compensatory Reserve Index (CRI) could differentiate ...


Guan Xuefei   2013
Damage diagnosis for turbine rotors plays an essential role in power plant management. Ultrasonic nondestructive examinations (NDEs) have increasingly been utilized as an effective tool to provide comprehensive information for damage diagnosis. This study presents a general methodology of damage diagnosis for turbine rotors using threedimensional adaptive ultrasonic NDE data ...


Schau Kyle   2013
The following report details the findings of a series of experiments and simulations performed on a commercially available, shuttle style golf cart during several maneuvers involving rapid accelerations of the vehicle. It is determined that the current set of passive restraints on these types of golf carts are not adequate ...


Martinez Edson Z   2013
The cure fraction models are usually used to model lifetime time data with longterm survivors. In the present article, we introduce a Bayesian analysis of the fourparameter generalized modified Weibull (GMW) distribution in presence of cure fraction, censored data and covariates. In order to include the proportion of "cured" patients, ...


Aguirre Erik   2013
Abstract In this article, the impact of topology as well as morphology of a complex indoor environment such as a commercial aircraft in the estimation of dosimetric assessment is presented. By means of an inhouse developed deterministic 3D raylaunching code, estimation of electric field amplitude as a function of position ...


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