Search Results
Results 1 - 50 of 3125
1 2 3 4 5 6 7 8 9 10 >
Crawford Britnee B Dallas Baptist University, 3000 Mountain Creek Pkwy, Dallas, TX 75211, United States. - - 2014
This study presents a metapopulation model for the sylvatic transmission of Trypanosoma cruzi, the etiological agent of Chagas' disease, across multiple geographical regions and multiple overlapping host-vector transmission cycles. Classical qualitative analysis of the model and several submodels focuses on the parasite's basic reproductive number, illustrating how vector migration across ...
Liu Zhi - - 2014
This paper proposes a novel saliency detection framework termed as saliency tree. For effective saliency measurement, the original image is first simplified using adaptive color quantization and region segmentation to partition the image into a set of primitive regions. Then, three measures, i.e., global contrast, spatial sparsity, and object prior ...
Chen Kejia K Departments of Chemical and Biomolecular Engineering, ‡Materials Science and Engineering, §Chemistry, and ∥Physics, University of Illinois , Urbana, Illinois 61801, United - - 2014
Particle tracking, the analysis of individual moving elements in time series of microscopic images, enables burgeoning new applications, but there is need to better resolve conformation and dynamics. Here we describe the advantages of Delaunay triangulation to extend the capabilities of particle tracking in three areas: (1) discriminating irregularly shaped ...
Liu Qunfeng Q College of Computing, Dongguan University of Technology, Dongguan, 523808, China. - - 2014
Abstract Several stability analyses and stable regions of particle swarm optimization (PSO) have been proposed before. The assumption of stagnation and different definitions of stability are adopted in these analyses. In this paper, the order-2 stability of PSO are analyzed based on a weak stagnation assumption. A new definition of ...
Smith Peter P Department of Microbiology, School of Natural Sciences, National University of Ireland, Galway, - - 2014
Analysis of 163 disc diffusion data sets, 115 for bacterial species groups and 48 for types strains, published by EUCAST, was used to optimize the setting of the parameters of a standardized protocol for normalized resistance interpretation of these data. The standard deviations of the normalized distributions of these data ...
Ramezani Habib H Department of Forest Resource Management, Swedish University of Agricultural Sciences (SLU), SE-901 83, Umeå, Sweden, - - 2014
An interesting alternative to wall-to-wall mapping approaches for the estimation of landscape metrics is to use sampling. Sample-based approaches are cost-efficient, and measurement errors can be reduced considerably. The previous efforts of sample-based estimation of landscape metrics have mainly been focused on data collection methods, but in this study, we ...
Hill Shannon S Department of Mechanical Engineering, University of Alberta, Edmonton, AB, - - 2014
Symmetry is a trait that has been extensively reviewed, especially clinically, as an indication of ideal geometry and health. Many geometric symmetry assessment techniques rely on two-dimensional measurements that do not account for the three-dimensional nature of the object. In this article, two methods, reflection and a process termed rotoinversion, ...
Maier Johannes K X JK Chemical Computing Group, Inc., 1010 Sherbrooke St. W, Suite 910, Montreal, Quebec, - - 2014
The success of antibody-based drugs has led to an increased demand for predictive computational tools to assist antibody engineering efforts surrounding the six hypervariable loop regions making up the antigen binding site. Accurate computational modeling of isolated protein loop regions can be quite difficult; consequently, modeling an antigen binding site ...
Xu Y Y Department of Mechanical and Aerospace Engineering, University of Central Florida, Orlando, FL, - - 2014
Biological species have produced many simple but efficient rules in their complex and critical survival activities such as hunting and mating. A common feature observed in several biological motion strategies is that the predator only moves along paths in a carefully selected or iteratively refined subspace (or manifold), which might ...
Fetita Catalin - - 2014
Emerging idea in asthma phenotyping, incorporating local morphometric information on the airway wall thickness would be able to better account for the process of airway remodeling as indicator of pathology or therapeutic impact. It is thus important that such information be provided uniformly along the airway tree, not on a ...
Zhang Xuan X Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA - - 2014
Secondary organic aerosol (SOA) constitutes a major fraction of submicrometer atmospheric particulate matter. Quantitative simulation of SOA within air-quality and climate models-and its resulting impacts-depends on the translation of SOA formation observed in laboratory chambers into robust parameterizations. Worldwide data have been accumulating indicating that model predictions of SOA are ...
Xu Pengpeng P Urban Transport Research Center, School of Traffic and Transportation Engineering, Central South University, Changsha, Hunan 410075, PR - - 2014
A wide array of spatial units has been explored in current regional safety analysis. Since traffic crashes exhibit extreme spatiotemporal heterogeneity which has rarely been a consideration in partitioning these zoning systems, research based on these areal units may be subjected to the modifiable areal unit problem (MAUP). This study ...
Fernández Israel I Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain. - - 2014
In this Tutorial Review, we make the point that a true understanding of trends in reactivity (as opposed to measuring or simply computing them) requires a causal reactivity model. To this end, we present and discuss the Activation Strain Model (ASM). The ASM establishes the desired causal relationship between reaction ...
Puig-Junoy Jaume J Department of Economics and Business, Pompeu Fabra University, Ramon Trias Fargas 25-27, 34-08005, Barcelona, Catalunya, Spain, - - 2014
After more than three decades of free medicines for the elderly in Spain, in the context of heavy austerity reforms of public financing, a set of cost-sharing reforms on pharmaceutical prescriptions with regional variants have been established in Spain since July 2012. The purpose of this analysis is to present ...
Kuznetsova Olga M OM a Director Scientific Staff , Late Development Statistics, Merck & Co. , 126 E. LINCOLN AVENUE, PO BOX 2000, RAHWAY NJ - - 2014
ABSTRACT Morrissey, McEntegart and Lang showed that in multi-center studies with equal allocation to several treatment arms modified Zelen's approach provides excellent within-center and across-study balance in treatment assignments. In this paper hierarchical balancing procedures for equal allocation to more than two arms (with some elements different from earlier versions) ...
Kim Haksub - - 2014
We describe a new 3D saliency prediction model that accounts for diverse low-level luminance, chrominance, motion, and depth attributes of 3D videos as well as high-level classifications of scenes by type. The model also accounts for perceptual factors, such as the nonuniform resolution of the human eye, stereoscopic limits imposed ...
Nascimento Jacinto C - - 2014
This paper presents a novel manifold learning algorithm for high-dimensional data sets. The scope of the application focuses on the problem of motion tracking in video sequences. The framework presented is twofold. First, it is assumed that the samples are time ordered, providing valuable information that is not presented in ...
Bae Jangpyo J Interdisciplinary Program, Bioengineering Major, Graduate School, Seoul National University, Seoul 110-744, South Korea and Department of Radiology, University of Ulsan College of Medicine, 388-1 Pungnap2-dong, Songpa-gu, Seoul 138-736, South - - 2014
To develop and validate a semiautomatic segmentation method for thoracic cavity volumetry and mediastinum fat quantification of patients with chronic obstructive pulmonary disease. The thoracic cavity region was separated by segmenting multiorgans, namely, the rib, lung, heart, and diaphragm. To encompass various lung disease-induced variations, the inner thoracic wall and ...
Ma Xuexiao X Department of Orthopaedic Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, - - 2014
The objective of this study was to use three-dimensional finite element (FE) models to analyze the stability and the biomechanics of two upper cervical fixation methods: the C2 intralaminar screw method and the C2 pedicle screw method. From computed tomography images, a nonlinear three-dimensional FE model from C0 (occiput) to ...
Pincus Steve S 990 Moose Hill Road, Guilford, CT - - 2014
The certification, construction, and delineation of individual, infinite-length "random" sequences have been longstanding yet incompletely resolved problems. We address this topic via the study of normal numbers, which often have been viewed as reasonable proxies for randomness, given their limiting equidistribution of subblocks of all lengths. However, limitations arise within ...
Ceballos Leonardo A LA Department of Veterinary Sciencies, University of Turin, Via L. da Vinci 44, 10095, Grugliasco, Turin, - - 2014
Questing ticks were collected during monthly dragging sessions (March-August 2011) in three provinces of the Liguria region, north-western Italy, to evaluate the species occurrence, spatial distribution and relative abundance. A total of 1,464 specimens were collected in 94 dragging sites. Ixodes ricinus was the most abundant species (81.3 % of collected ...
Chakraborty Abhishek A National Remote Sensing Centre, Indian Space Research Organization, Balanagar, Hyderabad, 500037, India, - - 2014
The Global Inventory Modeling and Mapping Studies bimonthly Normalized Difference Vegetation Index (NDVI) data of 8 × 8 km spatial resolution for the period of 1982-2006 were analyzed to detect the trends of crop phenology metrics (start of the growing season (SGS), seasonal NDVI amplitude (AMP), seasonally integrated NDVI (SiNDVI)) during kharif season ...
Grotegerd Dominik D Department of Psychiatry, University of Münster, Albert-Schweitzer- Campus 1 A9, 48149, Münster, - - 2014
Conventional univariate statistics are common and widespread in neuroimaging research. However, functional and structural MRI data reveal a multivariate nature, since neighboring voxels are highly correlated and different localized brain regions activate interdependently. Multivariate pattern classification techniques are capable of overcoming shortcomings of univariate statistics. A rising interest in such ...
Niizato Takayuki T Faculity of Engineering, Information and Systems, Tsukuba University, Japan. Electronic address: - - 2014
Recently, it has become possible to more precisely analyze flocking behavior. Such research has prompted a reconsideration of the notion of neighborhoods in the theoretical model. Flocking based on topological distance is one such result. In a topological flocking model, a bird does not interact with its neighbors on the ...
Trujillo Chadwick A CA 1] Gemini Observatory, 670 North A'ohoku Place, Hilo, Hawaii 96720, USA - - 2014
The observable Solar System can be divided into three distinct regions: the rocky terrestrial planets including the asteroids at 0.39 to 4.2 astronomical units (AU) from the Sun (where 1 AU is the mean distance between Earth and the Sun), the gas giant planets at 5 to 30 AU from the Sun, ...
Tsamis Alkiviadis A Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, - - 2014
Crohn's disease is a challenging inflammatory process with a propensity for focal gastro-intestinal tract inflammation and stricture. Surgically, Crohn's is often treated with resection. However, a subtype of diffuse disease with multiple strictures is treated by strictureplasty procedures in hope of avoiding short-gut syndrome. Prior work by Pocivavsek et al. ...
Kim Lily L Research and Development, xyZfish, Ronkonkoma, NY, - - 2014
Fragile X syndrome (FXS) is the most common form of inherited intellectual disability and is caused by a loss of function of the fragile X mental retardation (fmr1) gene. Animal fmr1-knockout (KO) models are not only of interest for the study of FXS, but have also important implications for our ...
Fan Rui - - 2014
Atherosclerotic plaque progression and rupture are believed to be associated with mechanical stress conditions. In this paper, patient-specific in vivo intravascular ultrasound (IVUS) coronary plaque image data were used to construct computational models with fluid-structure interaction (FSI) and cyclic bending to investigate correlations between plaque wall thickness and both flow ...
Lukeman Ryan R Dept. of Mathematics, Statistics, and Computer Science, St. Francis Xavier University, Antigonish, NS, Canada. Electronic address: - - 2014
One striking feature of collective motion in animal groups is a high degree of alignment among individuals, generating polarized motion. When order is lost, the dynamic process of reorganization, directly resulting from the individual interaction rules, provides significant information about both the nature of the rules, and how these rules ...
Ponti Luigi L Laboratorio Gestione Sostenibile degli Agroecosistemi, Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (ENEA), Centro Ricerche Casaccia, 00123 Rome, - - 2014
The Mediterranean Basin is a climate and biodiversity hot spot, and climate change threatens agro-ecosystems such as olive, an ancient drought-tolerant crop of considerable ecological and socioeconomic importance. Climate change will impact the interactions of olive and the obligate olive fruit fly (Bactrocera oleae), and alter the economics of olive ...
Mitchell Katy K School of Physical Therapy, Institute of Health Sciences - Houston Campus, Texas Woman's University , Houston, TX , - - 2014
ABSTRACT Purpose/hypothesis: The purpose of this study was to determine the reliability and validity of two smartphone applications: (1) GetMyROM - inclinometery-based and (2) DrGoniometry - photo-based in the measurement of active shoulder external rotation (ER) as compared to standard goniometry (SG). Participants: Ninety-four Texas Woman's University Doctor of Physical ...
Foo Jerome Clifford JC Department of Cognitive Neuroscience, Graduate School of Medicine, The University of Tokyo. Electronic address: - - 2014
When we decide between two options, we can make our decision based on what we prefer, (preference-based choice), or we can also choose based on which option we want to avoid more (non-preference-based choice). Most decision making research has examined preference-based choice but has not differentiated it from non-preference-based choice. ...
Molina Edgardo - - 2014
Capturing aerial imagery at high resolutions often leads to very low frame rate video streams, well under Full Motion Video standards, due to bandwidth, storage, and cost constraints. Low frame rates make registration difficult when an aircraft is moving at high speeds or when GPS contains large errors or it ...
Lin Lanny - - 2014
During unmanned aerial vehicle (UAV) search missions, efficient use of UAV flight time requires flight paths that maximize the probability of finding the desired subject. The probability of detecting the desired subject based on UAV sensor information can vary in different search areas due to environment elements like varying vegetation ...
Walenga Ross L RL Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA, United - - 2014
Previous in vitro models of the airways are either rigid or, if flexible, have not matched in vivo compliance characteristics. Rapid prototyping provides a quickly evolving approach that can be used to directly produce in vitro airway models using either rigid or flexible polymers. The objective of this study was ...
Griffanti Ludovica L FMRIB (Oxford University Centre for Functional MRI of the Brain), UK; Department of Electronics, Information and Bioengineering, Politecnico di Milano, Milan, Italy; MR Laboratory, IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy. Electronic address: - - 2014
The identification of resting state networks (RSNs) and the quantification of their functional connectivity in resting-state fMRI (rfMRI) are seriously hindered by the presence of artefacts, many of which overlap spatially or spectrally with RSNs. Moreover, recent developments in fMRI acquisition yield data with higher spatial and temporal resolutions, but ...
Vogeler Iris I AgResearch, Grasslands Research Centre, Palmerston North, New Zealand. Electronic address: - - 2014
Farm system and nutrient budget models are increasingly being used to inform and evaluate policy options on the impacts of land use change on regional environmental and economic performance. In this study, the common approach of up-scaling representative farm systems to a regional scale, with a limited input of resource ...
Boucher Florian C FC Laboratoire d'Ecologie Alpine, Unité Mixte de Recherche 5533 CNRS-Université de Grenoble, Grenoble, - - 2014
Abstract Recent debate on whether climatic niches are conserved through time has focused on how phylogenetic niche conservatism can be measured by deviations from a Brownian motion model of evolutionary change. However, there has been no evaluation of this methodological approach. In particular, the fact that climatic niches are usually ...
Zhang Xiaoyang X Geospatial Sciences Center of Excellence (GSCE), South Dakota State University, 1021 Medary Ave., Wecota Hall 506B, Brookings, SD, 57007-3510, USA, - - 2014
Land surface phenology is widely retrieved from satellite observations at regional and global scales, and its long-term record has been demonstrated to be a valuable tool for reconstructing past climate variations, monitoring the dynamics of terrestrial ecosystems in response to climate impacts, and predicting biological responses to future climate scenarios. ...
Mori Toshifumi - - 2014
Motivated by specific applications and the recent work of Gao and co-workers on integrated tempering sampling (ITS), we have developed a novel sampling approach referred to as integrated Hamiltonian sampling (IHS). IHS is straightforward to implement and complementary to existing methods for free energy simulation and enhanced configurational sampling. The ...
Erler Nicole Stephanie NS Biostatistics, ErasmusMC, Dr. Molewaterplein 50, Rotterdam, 3015 GE, - - 2014
Purpose: To introduce a method to optimize structural retinal nerve fiber layer (RNFL) models based on glaucomatous visual field data and to show how such an optimized model can be used to reduce noise in visual fields while preserving clinically important features. Methods: Correlation coefficients between age-adjusted deviation values of ...
Janunts Edgar E Experimental Ophthalmology, University of Saarland, Kirrberger str. 100, Bldg. 7, D-66421 Homburg, Germany. Electronic address: - - 2014
As the average corneal shape can effectively be approximated by a conic section, a determination of the corneal shape by biconic parameters is desired. The purpose of the paper is to introduce a straightforward mathematical approach for extracting clinically relevant parameters of corneal surface, such as radii of curvature and ...
Fleming Chris H CH Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, Virginia - - 2014
Abstract Understanding animal movement is a key challenge in ecology and conservation biology. Relocation data often represent a complex mixture of different movement behaviors, and reliably decomposing this mix into its component parts is an unresolved problem in movement ecology. Traditional approaches, such as composite random walk models, require that ...
Erbulut D U DU Department of Mechanical Engineering, College of Engineering, Koc University, Rumelifeneri Yolu, Istanbul 34450, Turkey; Department of Neurosurgery, School of Medicine, Koc University, Rumelifeneri Yolu, Istanbul 34450, Turkey. Electronic address: - - 2014
Different finite element models of the cervical spine have been suggested for evaluating the roles of ligaments, facet joints, and disks in the stability of cervical spine under sagittal moments. However, no comprehensive study on the response of the full cervical spine that has used a detailed finite element (FE) ...
Yan Renxiang R Institute of Applied Genomics, School of Biological Science and Engineering of Fuzhou University, Fuzhou 350002, China. - - 2014
Locating the transmembrane regions of outer membrane proteins (OMPs) is highly important for deciphering their biological functions at both molecular and cellular levels. Here, we propose a novel method to predict the transmembrane regions of OMPs by employing the position- and composition-based features of sequence profiles. Furthermore, a simple probability-based ...
Angulo David D Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy, - - 2014
Society is becoming more conscious on the need to preserve the environment. Sustainable development schemes have grown rapidly as a tool for managing, predicting and improving the growth path in different regions and economy sectors. We introduce a novel and simple mathematical model of ordinary differential equations (ODEs) in order ...
Mendoza Carlos S CS Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC, USA; Signal Processing Department, University of Sevilla, Sevilla, Spain. Electronic address: - - 2014
We present a technique for the computational analysis of craniosynostosis from CT images. Our fully automatic methodology uses a statistical shape model to produce diagnostic features tailored to the anatomy of the subject. We propose a computational anatomy approach for measuring shape abnormality in terms of the closest case from ...
Miller Nicola A NA Aberdeen Biomedical Imaging Centre, Lilian Sutton Building, Foresterhill, Aberdeen, UK. Electronic address: - - 2014
The shape of the vocal tract and associated structures (eg, tongue and velum) is complicated and varies according to development and function. This variability challenges interpretation of voice experiments. Quantifying differences between shapes and understanding how vocal structures move in relation to each other is difficult using traditional linear and ...
Fraser Ceridwen I CI Fenner School of Environment and Society, Australian National University, Canberra, ACT 0200, - - 2014
Climate change has played a critical role in the evolution and structure of Earth's biodiversity. Geothermal activity, which can maintain ice-free terrain in glaciated regions, provides a tantalizing solution to the question of how diverse life can survive glaciations. No comprehensive assessment of this "geothermal glacial refugia" hypothesis has yet ...
Kagemann Larry L Department of Ophthalmology, UPMC Eye Center, Eye and Ear Institute, Ophthalmology and Visual Science Research Center, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, - - 2014
To compare three methods of Schlemm's canal (SC) cross-sectional area (CSA) measurement. Ten eyes (10 healthy volunteers) were imaged three times using spectral-domain optical coherence tomography (Cirrus HD-OCT, Zeiss, Dublin, California, USA). Aqueous outflow vascular structures and SC collector channel ostia were used as landmarks to identify a reference location ...
1 2 3 4 5 6 7 8 9 10 >