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Results 401 - 450 of 6570
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Chisholm Ryan A RA Smithsonian Tropical Research Institute, P.O. Box 0843-03092, Balboa, Ancón, Republic of Panamá; Department of Biological Sciences, Faculty of Science, National University of Singapore, 14 Science Drive 4, Singapore, 117543, - - 2014
Long-term surveys of entire communities of species are needed to measure fluctuations in natural populations and elucidate the mechanisms driving population dynamics and community assembly. We analysed changes in abundance of over 4000 tree species in 12 forests across the world over periods of 6-28 years. Abundance fluctuations in all forests ...
Merello Paloma P Department of Applied Physics (UD Industrial Engineering), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain; Valencian Institute for Conservation and Restoration of Cultural Heritage (IVC+R), C/Genaro Lahuerta 25-3°, 46010 Valencia, Spain. Electronic address: - - 2014
Chemometrics has been applied successfully since the 1990s for the multivariate statistical control of industrial processes. A new area of interest for these tools is the microclimatic monitoring of cultural heritage. Sensors record climatic parameters over time and statistical data analysis is performed to obtain valuable information for preventive conservation. ...
He Xiaoming X Geisel School of Medicine, Dartmouth College, Hanover, NH 03755, - - 2014
There is an imperative need to develop methods that can rapidly and accurately determine individual exposure to radiation for screening (triage) populations and guiding medical treatment in an emergency response to a large-scale radiological/nuclear event. To this end, a number of methods that rely on dose-dependent chemical and/or physical alterations ...
Hu Yunfeng Y State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun, PR China; Department of Control Science and Engineering, Jilin University (Campus NanLing), Changchun, PR - - 2014
In this paper, a model-based nonlinear gearshift controller is designed by the backstepping method to improve the shift quality of vehicles with a dual-clutch transmission (DCT). Considering easy-implementation, the controller is rearranged into a concise structure which contains a feedforward control and a feedback control. Then, robustness of the closed-loop ...
Dhossche Dirk M DM From the Department of Psychiatry, University of Mississippi Medical Center, Jackson, - - 2014
Catatonia is currently viewed as a unique syndrome that consists of specific motor signs responding to benzodiazepines and electroconvulsive therapy (ECT). Advances in catatonia may provide a new window into the mechanism of ECT. Findings on catatonia are updated and related to the mechanism of ECT. Selective literature review. There ...
Kaplan David A DA Department of Environmental Engineering Sciences, University of Florida, PO Box 116350, Gainesville, FL 32611, USA. Electronic address: - - 2014
Coastal wetlands occupy a delicate position at the intersection of fresh and saline waters. Changing climate and watershed hydrology can lead to saltwater intrusion into historically freshwater systems, causing plant mortality and loss of freshwater habitat. Understanding the hydrological functioning of tidally influenced floodplain forests is essential for advancing ecosystem ...
Lundgren-Nilsson Asa A Centre for Person-centred Care, Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Clinical Neuroscience and Rehabilitation, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, - - 2014
Fatigue is a common and distressing symptom in cancer patients due to both the disease and its treatments. The concept of fatigue is multidimensional and includes both physical and mental components. The 22-item Revised Piper Fatigue Scale (RPFS) is a multidimensional instrument developed to assess cancer-related fatigue. This study reports ...
Qi Shuai S School of Food and Biological Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, Jiangsu, PR - - 2014
A portable and low-cost optical sensors system consisting of hardware and software was developed and used for real-time monitoring total polyphenols content in tea in this work. This developed system was used for data acquisition. Partial least square (PLS) with several variable selection algorithms was used for modeling. Synergy interval ...
Suenderhauf Claudia C Pharmaceutical Sciences, Pharma Research and Early Development, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland, - - 2014
Onset and rate of gastric emptying are important determinants of drug absorption after oral dosing. Therefore, robust estimates of these parameters are needed in physiologically based absorption models to predict reliably plasma concentration time profiles. For human and some other laboratory animals, reasonable parameterization of gastric emptying has been established. ...
de Moraes Augusto César - - 2014
Resting heart rate reflects sympathetic nerve activity. A significant association between resting heart rate (HR) and all causes of cardiovascular mortality has been reported by some epidemiologic studies. Despite suggestive evidence, resting heart rate (RHR) has not been formally explored as a prognostic factor and potential therapeutic outcome and, therefore, ...
Sentürk Damla D Department of Biostatistics, University of California, Los Angeles, CA, - - 2014
Motivated by a longitudinal study on factors affecting the frequency of clinic visits of older adults, an exploratory time varying lagged regression analysis is proposed to relate a longitudinal response to multiple cross-sectional and longitudinal predictors from time varying lags. Regression relations are allowed to vary with time through smooth ...
Robbins Blaine B Department of Sociology, University of Washington, 211 Savery Hall, Box 353340, Seattle, WA 98195-3340, United States. Electronic address: - - 2014
Although the social exchange paradigm has produced a vibrant research program, the theoretical tradition is rarely used to model the structure of social networks outside of experiments and simulations. To address this limitation, we derive power-dependence predictions about network structure and geographic mobility-the outcomes of power-use-and test these predictions using ...
Fallahi Firouz F Department of Economics, University of Tabriz, Tabriz, Iran. Electronic address: - - 2014
This study has two goals. The first is to use Markov Switching models to identify and analyze the cycles in the unemployment rate and four different types of property-related criminal activities in the US. The second is to apply the nonparametric concordance index of Harding and Pagan (2006) to determine ...
Yeh Yi-Ren - - 2014
We present a novel domain adaptation approach for solving cross-domain pattern recognition problems, i.e., the data or features to be processed and recognized are collected from different domains of interest. Inspired by canonical correlation analysis (CCA), we utilize the derived correlation subspace as a joint representation for associating data across ...
Chen Chao - - 2014
Newly developed hypertext transfer protocol (HTTP)-based video streaming technologies enable flexible rate-adaptation under varying channel conditions. Accurately predicting the users' quality of experience (QoE) for rate-adaptive HTTP video streams is thus critical to achieve efficiency. An important aspect of understanding and modeling QoE is predicting the up-to-the-moment subjective quality of ...
Babadi Behtash - - 2014
Nonparametric spectral estimation is a widely used technique in many applications ranging from radar and seismic data analysis to electroencephalography (EEG) and speech processing. Among the techniques that are used to estimate the spectral representation of a system based on finite observations, multitaper spectral estimation has many important optimality properties, ...
Bradley Paul Simon PS a Department of Sports & Exercise Sciences , University of Sunderland , Sunderland , SR1 3SD , - - 2014
Abstract The aims of this study were twofold: (1) to examine the influence of situational variables on ball possession in elite soccer and (2) to quantify the variables that discriminate between high or low percentage ball possession teams (HPBPT and LPBPT) across different playing positions. Match performance data were collected ...
Dunn John C JC School of Psychology, University of Adelaide, North Terrace, Adelaide, 5005, Australia, - - 2014
Ashby (2014) has argued that state-trace analysis (STA) is not an appropriate tool for assessing the number of cognitive systems, because it fails in its primary goal of distinguishing single-parameter and multiple-parameter models. We show that this is based on a misunderstanding of the logic of STA, which depends solely ...
Gori Franco - - 2014
We present a number of results relating to the difference of two Gaussian Schell-model cross-spectral densities (CSDs). They allow us to specify conditions under which such a difference represents itself in a valid CSD. In particular, a sufficient condition is derived for the non-negative definiteness of the resulting CSD, for ...
Degras David D Department of Mathematical Sciences, DePaul University,cxu - - 2014
In this paper we introduce a new hierarchical model for the simultaneous detection of brain activation and estimation of the shape of the hemodynamic response in multi-subject fMRI studies. The proposed approach circumvents a major stumbling block in standard multi-subject fMRI data analysis, in that it both allows the shape ...
Katapally Tarun R TR Department of Community Health and Epidemiology, College of Medicine, Health Science Building , 107 Wiggins Road , University of Saskatchewan, Saskatoon , Saskatchewan, Canada S7N 5E5 - - 2014
Accelerometers are predominantly used to objectively measure the entire range of activity intensities - sedentary behaviour (SED), light physical activity (LPA) and moderate to vigorous physical activity (MVPA). However, studies consistently report results without accounting for systematic accelerometer wear-time variation (within and between participants), jeopardizing the validity of these results. ...
Ferdowsi Hasan - - 2014
Measured data or states for a nonlinear dynamic system is usually contaminated by outliers. Identifying and removing outliers will make the data (or system states) more trustworthy and reliable since outliers in the measured data (or states) can cause missed or false alarms during fault diagnosis. In addition, faults can ...
Jing Yaqi Y Tianjin Key Laboratory of Process Measurement and Control, Institute of Robotics and Autonomous Systems, School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, - - 2014
An electronic nose (e-nose) was designed to classify Chinese liquors of the same aroma style. A new method of feature reduction which combined feature selection with feature extraction was proposed. Feature selection method used 8 feature-selection algorithms based on information theory and reduced the dimension of the feature space to ...
Pedersen Ulrik B - - 2014
The environment, the on-going global climate change and the ecology of animal species determine the localisation of habitats and the geographical distribution of the various species in nature. The aim of this study was to explore the effects of such changes on snail species not only of interest to naturalists ...
Mohr Rachel M - - 2014
As the most common primary colonizer of carrion, adult blow flies (Diptera: Calliphoridae) play an important role in initiating arthropod-mediated breakdown of soft tissue; however, their timing is highly variable. This variability complicates the estimation of precolonization intervals or periods of insect activity by forensic entomologists. In this study, the ...
Brantley Mark W MW Goose Point Analysis L.L.C., Covington, LA - - 2014
Simulation can be a very powerful tool to help decision making in many applications but exploring multiple courses of actions can be time consuming. Numerous ranking & selection (R&S) procedures have been developed to enhance the simulation efficiency of finding the best design. To further improve efficiency, one approach is ...
Cheng Dongliang - - 2014
Color constancy is a well-studied topic in color vision. Methods are generally categorized as (1) low-level statistical methods, (2) gamut-based methods, and (3) learning-based methods. In this work, we distinguish methods depending on whether they work directly from color values (i.e., color domain) or from values obtained from the image's spatial information (e.g., ...
O'Brien John D JD Bowdoin - - 2014
Metagenomics provides a powerful new tool set for investigating evolutionary interactions with the environment. However, an absence of model-based statistical methods means that researchers are often not able to make full use of this complex information. We present a Bayesian method for inferring the phylogenetic relationship among related organisms found ...
Suárez Liliana L School of Public Health, Faculty of Medicine, University of Chile, Santiago, - - 2014
The objective of this study was to compare personal exposure to particulate matter (fine and ultrafine particles) in commuters using different transport modes (bicycle, bus, car and subway) in a busy, assigned route in downtown Santiago, Chile. Volunteers carrying personal samplers completed scheduled commutes during the morning rush hours, while ...
Gardiner Stuart K SK Discoveries in Sight Laboratories, Devers Eye Institute, Legacy Health, Portland, Oregon, United - - 2014
Variability in perimetry increases with the amount of damage, making it difficult for testing algorithms to efficiently converge to the true sensitivity. This study describes a variability-adjusted algorithm (VAA), in which step size increases with variability. Contrasts were transformed to a new scale wherein the SD of frequency-of-seeing curves remains ...
Hardaway J Andrew JA Departments of - - 2014
The nematode Caenhorhabditis elegans offers great power for the identification and characterization of genes that regulate behavior. In support of this effort, analytical methods are required that provide dimensional analyses of subcomponents of behavior. Previously, we demonstrated that loss of the presynaptic dopamine (DA) transporter, dat-1, evokes DA-dependent Swimming Induced ...
Lee Sang-Hong SH Department of Computer Science & Engineering, Anyang University, Anyang-si, Republic of Korea. Electronic address: - - 2014
This paper proposes new combined methods to classify normal and epileptic seizure EEG signals using wavelet transform (WT), phase-space reconstruction (PSR), and Euclidean distance (ED) based on a neural network with weighted fuzzy membership functions (NEWFM). WT, PSR, ED, and statistical methods that include frequency distributions and variation, were implemented ...
Lv Jinglei J School of Automation, Northwestern Polytechnical University, Xi'an, - - 2014
Group-wise activation detection in task-based fMRI has been widely used because of its robustness to noises and its capacity to deal with variability of individual brains. However, current group-wise fMRI activation detection methods typically rely on the co-registration of individual brains' fMRI images, which has difficulty in dealing with the ...
Wens Vincent V Laboratoire de Cartographie fonctionnelle du Cerveau, UNI - ULB Neurosciences Institute, Université libre de Bruxelles (ULB), Brussels, Belgium, - - 2014
Functional connectivity studies conducted at the group level using magnetoencephalography (MEG) suggest that resting state networks (RSNs) emerge from the large-scale envelope correlation structure within spontaneous oscillatory brain activity. However, little is known about the consistency of MEG RSNs at the individual level. This paper investigates the inter- and intra-subject ...
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 ...
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