Model based cluster analysis is often carried out by estimation of the parameters of a normal mixture. But mixture components do not necessarily reeect the idea of a \cluster". I discuss how to formalize the concept of \clusters" w.r.t. probability distributions on the real line by means of xed point clusters, i.e., sets that do not contain any outlier and with respect to which the rest of the ...

. in order to study the variation for seed yield and its components, 200 accessions of alfalfa (medicago sativa l.) were sown as drilled plots, using alpha designs/unreplicated with two repeated entries with in all of 10 blocks under dry land farming system in kabodarahang research station, hamadan, iran, during 2010 to 2011. data were analyzed for descriptive statistics, correlation, regressio...

Abstract In molecular biology, just as in many other fields of science, data often come the form matrices or contingency tables with observations (rows) for a set variables (columns). While projection methods like principal component analysis correspondence (CA) can be applied obtaining an overview such data, cases where matrix is very large associated loss information upon into two three dimen...

The Karnafully is one of the most important rivers due to its profound influence on water chemistry and sediment characteristics. The present study intended to assess the quality of water and sediment from intertidal zone of this river in respect to the pollution index. Seasonal water and sediment samples were collected during four seasons (Monsoon, post-monsoon, winter, and pre-monsoon) of 201...

The chloride ion, Cl(-), is an essential cofactor for oxygen evolution of photosystem II (PSII) and is closely associated with the Mn(4)Ca cluster. Its detailed location and function have not been identified, however. We substituted Cl(-) with a bromide ion (Br(-)) or an iodide ion (I(-)) in PSII and analyzed the crystal structures of PSII with Br(-) and I(-) substitutions. Substitution of Cl(-...

Clusters are geographically close groups of related companies or institutions related to a certain area which are inherently more efficient than the other companies due to advantages such as being located in one place, networks, external knowledge, variability of human capital, etc. Today, development through clusters plays a pivotal role in the economic and industrial policies of developed...

The Karnafully is one of the most important rivers due to its profound influence on water chemistry and sediment characteristics. The present study intended to assess the quality of water and sediment from intertidal zone of this river in respect to the pollution index. Seasonal water and sediment samples were collected during four seasons (Monsoon, post-monsoon, winter, and pre-monsoon) of 201...

A cage-like {[Ca(H(2)O)](6)(H(2)O)}(12+) cluster with a water molecule enwrapped, sandwiched by two novel [As(4)W(6)O(34)](12-) fragments, has been obtained, and the extension of these clusters from molecules into a 2-D layer occurs through [Ca(H(2)O)(5)](2+) linkers, which represents the first heteropolyoxoanion (HPA) constituted by [As(4)W(6)O(34)](12-) and the unprecedented high nuclearity {...

Objective: This article presents an application of cluster analysis for social sciences researches especially those studies that have an interview as part of their data collection. This application is more suitable for sequential mixed method researchers who use quantitative data to frame subsequent qualitative subsamples for conducting interviews.  Methods: In more detail, the algorithm (i....

In this paper an application of the cluster analysis technique in educational planning is demonstrated by means of a developed computer software with some characteristics of an expert system. The main idea is based on the knowledge-based systems which have been applied in group technology. The software is applied to weekly schedules of the courses and professors of the Industrial Engineering De...