8 articles for “Cluster Validity”

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Research ArticleOpen accessIn the keywordsGeometrical Approach to a New Hybrid Grid-Based Gravitational Clustering AlgorithmFaisal Bin Al Abid, A.N.M. Rezaul Karim, Golam Rahman ChowdhuryIn the past years, several clustering algorithms have been developed, for example, K-means, K-medoid. Most of these algorithms have the common problem of selecting the appropriate number of clusters and these algorithms are sensitive to noisy data and would cause less accurate clustering of the data set. Therefore, this paper introduces a new Hybrid Grid-based Gravitational Clustering Algorithm (HGGCA) geometrically, … …Journal of Computer Science, Vol. 17, Issue 3 · 9 Mar 2021 · 6,783 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsDirect Sequence and Frequency Hopping Signals Classification Based on Co-Occurrence Matrix and Clustering TechniquesHaidy S. Fouad, Hend A. Elsayed, Shawkat K. GirgisSpread Spectrum techniques (SS) were first developed for military applications, but currently, they have commercial applications. SS provides secure communication and allows multiple accesses for same radio spectrum. So, most Wireless Local Area Network (WLAN) systems use it, as do Cognitive Radios (CR), space systems and Global Positioning Systems (GPS). Direct Sequence Spread Spectrum (DSSS) and frequency hopped spread spectrum … …Journal of Computer Science, Vol. 15, Issue 1 · 10 Jan 2019 · 8,203 accessesView PDF Cite

Research ArticleOpen accessIn the abstractA Self-Concept Participatory Learning Model for the Improvement of Literacy Skills of the Learners in Community Learning CentresMumun Munawaroh, Dasim Budimansyah, Enceng Mulyana, Ace SuryadiIlliteracy eradication manifests as an important and a common aspect in many countries' development agendas as well as in the United Nation's development initiatives. Indonesia is one of such countries. Based on the data of 2004, Indonesia has at least 28 regencies that still have high illiteracy rates. This condition hinders national growth and development of a country. With a … …American Journal of Applied Sciences, Vol. 14, Issue 1 · 21 Jan 2017 · 7,425 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCluster Based Data Consistency for Cooperative Caching over Partitionable Mobile Adhoc NetworkP. Kuppusamy, B. KalaavathiProblem statement: Data availability and consistency are foremost issues in Mobile Ad hoc Networks due to the absence of permanent infrastructure. Cooperative caching addresses the data availability issue through coordinating the mobile nodes and sharing the cache copies among them. In the meantime, the mobile node must ensure the staleness of cache copies. The consistency maintenance resolves the staleness of … …American Journal of Applied Sciences, Vol. 9, Issue 8 · 10 Jul 2012 · 6,853 accessesView PDF Cite

Research ArticleOpen accessIn the abstractFuzzy Modeled K-Cluster Quality Mining of Hidden Knowledge for Decision SupportS. Parkash Kumar, K. S. RamaswamiProblem statement: The work presented Fuzzy Modeled K-means Cluster Quality Mining of hidden knowledge for Decision Support. Based on the number of clusters, number of objects in each cluster and its cohesiveness, precision and recall values, the cluster quality metrics is measured. The fuzzy k-means is adapted approach by using heuristic method which iterates the cluster to form an efficient … …Journal of Computer Science, Vol. 7, Issue 11 · 24 Aug 2011 · 6,671 accessesView PDF Cite

Research ArticleOpen accessIn the abstractRegression Analysis of Effective Factor on People Participation in Protecting, Revitalizing, Developing and Using Renewable Natural Resources in Ilam Province from the View of UsersBagher Arayesh, Sayed Jamal HosseiniProblem statement: The purpose of this study was the regression analysis of effective factor on people participation in protecting, revitalizing, developing and using renewable natural resources in Ilam province. Approach: This study was a casual comparative and applies one. Sample was taken from natural resources users. Results: The sample size of groups was 317 for users respectively. For sample selection, … …American Journal of Agricultural and Biological Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 7,955 accessesView PDF Cite

Research ArticleOpen accessIn the abstractFood-Related Lifestyle Segments in Taiwan: Application of the Food-Related Lifestyle InstrumentCheng-Hsi Fang, Hwang-Jaw LeeProblem statement: This study applied the Food-Related Lifestyle (FRL) instrument for market segmentation in the Taiwan food sector. FRL instrument was originally developed by the Market-Based Product and Process Development in Danish (MAPP) research group, the instrument was adjusted for the Chinese food culture. The FRL instrument is wildly applied to empirical market analysis, especially in European nations. Its reliability … …American Journal of Applied Sciences, Vol. 6, Issue 12 · 31 Dec 2009 · 7,353 accessesView PDF Cite

Research ArticleOpen accessIn the abstractDifferences between Learning Styles in Professional Courses at University LevelZebun N. KhanProblem statement: As shown by research studies, knowledge of learning styles of students on the part of teachers is helpful in enhancing effectiveness of teaching-learning process. The present study was conducted to study and compare learning styles of students pursuing different professional courses at the university stage. The ultimate purpose was to facilitate learning in professional education in Indian conditions … …Journal of Social Sciences, Vol. 5, Issue 3 · 30 Sep 2009 · 7,907 accessesView PDF Cite