• There was no significant difference in the overall quality of websites oriented for patients or healthcare providers providing cluster headache information evaluated in this study. (ingentaconnect.com)
  • In addition, websites providing high-quality cluster headache information are written at an educational level too high for a significant portion of the general population to fully utilize. (ingentaconnect.com)
  • We outline a general methodology for model-based clustering that provides a principled statistical approach to these issues. (psu.edu)
  • Growth in both the theory and applications of this clustering methodology has been steady since its inception. (scholarpedia.org)
  • Based on this novel methodology, we argue that verb cluster ordering in Dutch dialects can be reduced to three grammatical parameters (largely similar to the ones described in Barbiers et al. (jhu.edu)
  • It develops a methodology for clustering a large number of developing countries, identifying and ranking their welfare regimes, assessing their stability over the decade 1990-2000, and relating these to important structural variables. (bath.ac.uk)
  • In this paper , Italian school buildings' stock was analyzed by cluster analysis with the aim of providing a methodology able to identify the best energy retrofit interventions from the perspective of cost-benefit , and to correlate them with the specific characteristics of the educational buildings. (buildup.eu)
  • The cluster analysis is conducted with the aim of assigning data points (sequences) into reasonably homogenous groups (clusters). (thefreelibrary.com)
  • This study aimed to develop a novel, practical sequencing protocol that covered both conserved and variable regions of the viral genome and assess the influence of each subregion, sequence concatenation and unrelated reference sequences on phylogenetic clustering analysis. (plos.org)
  • NS5B concatenation, the inclusion of reference sequences and removal of HVR1 all influenced clustering outcome. (plos.org)
  • Seven HCV genotypes (1 to 7) with approximately 100 sub-types (1a, 1b, etc.) have been identified on the basis of molecular phylogenetic analyses of HCV sequences [ 4 ]. (plos.org)
  • D2_cluster: A Validated Method for Clustering EST and Full-length cDNA Sequences' John Burke, Dan Davison, and Winston Hide. (bio.net)
  • BACKGROUND: A computational system for analysis of the repetitive structure of genomic sequences is described. (jcvi.org)
  • The associated software (RepeatFinder), should prove helpful in the analysis of repeat structure for both complete and partial genome sequences. (jcvi.org)
  • It is a main task of exploratory data mining , and a common technique for statistical data analysis , used in many fields, including pattern recognition , image analysis , information retrieval , bioinformatics , data compression , computer graphics and machine learning . (wikipedia.org)
  • in Workshop on Clustering High Dimensional Data and its Applications, SIAM Data Mining. (springer.com)
  • Clustering techniques based on cores (representative points) are appropriate tools for data mining of large data sets. (wias-berlin.de)
  • Data mining in telecommunications: case study of cluster analysis. (thefreelibrary.com)
  • Clustering analysis has been widely applied in diverse fields such as data mining, access structures, knowledge discovery, software engineering, organization of information systems, and machine learning. (igi-global.com)
  • CART and other Salford data mining modules now include an approach to cluster analysis, density estimation and unsupervised learning using ideas that we trace to Leo Breiman , but which may have been known informally in among statisticians at Stanford and elsewhere for some time. (salford-systems.com)
  • Data mining can be classified into various models such as Clustering, Decision trees, Association rules, and Sequential pattern and time series. (ssrn.com)
  • Model-based Gaussian clustering allows to identify clusters of quite different shapes, see the application to ecology in Figure 2. (wias-berlin.de)
  • We identify statistically significant clusters with high or low rates in the zip code level using the Getis-Ord statistics. (hindawi.com)
  • Additionally, we performed a cluster analysis to identify neighborhoods with high rates of asthma inpatient hospitalizations. (cdc.gov)
  • Cluster analysis is an exploratory analysis that tries to identify structures within the data. (statisticssolutions.com)
  • The cluster analysis can then identify groups of patients that have similar symptoms. (statisticssolutions.com)
  • A cluster analysis then may identify what homogeneous groups exist among students (for example, high achievers in all subjects, or students that excel in certain subjects but fail in others). (statisticssolutions.com)
  • Background/aims To identify ocular phenotypes in patients with geographic atrophy secondary to age-related macular degeneration (GA) using a data-driven cluster analysis. (bmj.com)
  • Cluster analysis was used to identify subgroups within the population based on the presence of several phenotypic features: soft drusen, reticular pseudodrusen (RPD), primary foveal atrophy, increased fundus autofluorescence (FAF), greyish FAF appearance and subfoveal choroidal thickness (SFCT). (bmj.com)
  • Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster ) are more similar (in some sense) to each other than to those in other groups (clusters). (wikipedia.org)
  • Popular notions of clusters include groups with small distances between cluster members, dense areas of the data space, intervals or particular statistical distributions . (wikipedia.org)
  • A criterion such as between-groups sum of squares or likelihood can be plotted against the number of clusters in a scree plot . (encyclopedia.com)
  • To be precise, in the first stage I need to create clusters on the basis of a set of variables, s1, and in the second stage I need to create clusters, within the groups formed in the first stage, using a different set of variables, s2. (stata.com)
  • The goal of performing a cluster analysis is to sort different objects or data points into groups in a manner that the degree of association between two objects is high if they belong to the same group, and low if they belong to different groups. (surveygizmo.com)
  • For example, when cluster analysis is performed as part of market research , specific groups can be identified within a population. (surveygizmo.com)
  • The analysis of these groups can then determine how likely a population cluster is to purchase products or services. (surveygizmo.com)
  • If these groups are defined clearly, a marketing team can then target varying cluster with tailored, targeted communication. (surveygizmo.com)
  • The analyst groups objects so that objects in the same group (called a cluster) are more similar to each other than to objects in other groups (clusters) in some way. (wikipedia.org)
  • Cluster Randomised Controlled Trials (cRCTs) are trials which randomise groups of patients rather than individual patients. (sheffield.ac.uk)
  • The procedure outperformed others clustering techniques in the job of identifying consistent groups of countries from the economic and statistical viewpoints. (repec.org)
  • Finding Groups in Data: An Introduction to ClusterAnalysis . (program-transformation.org)
  • Clustering is a form of unsupervised machine learning, where instances are organized into groups whose members share similarities. (frontiersin.org)
  • A more significant clustering is one which groups distinct combinations into separate clusters. (bookdepository.com)
  • Kaleidoscope Pro detects similar vocalizations and quickly sorts them into groups to streamline your analysis. (wildlifeacoustics.com)
  • Kaleidoscope Pro automatically scans your recordings and pulls out distinct sounds and phrases, such as frog calls or bird songs, and groups them into clusters. (wildlifeacoustics.com)
  • Firstly, segmentations lie at the core of many submissions to IJMR, but simply because a cluster analysis has produced a number of discrete groups of consumers, that does not mean it provides a valid interpretation of the market. (mrs.org.uk)
  • Secondly, segmentations need to facilitate action, but often the clusters are somewhat meaningless if it is not possible to use the output in a practical way, for example, to develop a marketing strategy that can communicate differentiated messages to the target groups. (mrs.org.uk)
  • For this reason, cluster trials should be published with an estimate of the degree of clustering within groups (the intraclass correlation coefficient) and the effect that this has upon statistical power (the design effect). (bmj.com)
  • The fewer groups randomised and the more individuals there are per group, the greater the potential impact of any clustering. (bmj.com)
  • T. M. Horacek and N. M. Betts, "Students Cluster into 4 Groups According to the Factors Influencing Their Dietary Intake," Journal of the American Dietetic Association, Vol. 98, No. 12, 1998, pp. 1264-1467. (scirp.org)
  • Although the responsible gene cluster has been identified, the biosynthetic pathway remains to be elucidated. (mdpi.com)
  • In the present study, members of the gene cluster were deleted individually in a Fusarium graminearum strain overexpressing the local transcription factor. (mdpi.com)
  • This specialized protein transport system is encoded by a 32.18kb hrp (hypersensitive response and pathogenicity) gene cluster. (nih.gov)