knowledge of habitat requirements of aquatic animals plays an important role in fisheries and protection programs of aquatic ecosystems. hence, this study was conducted to investigate the suitability indexes of habitat use and habitat suitability index (hsi) of barbus cyri in its distribution range in tootkabon river. a number of environmental variables, including elevation, water depth, river ...

an r-module m is called epi-retractable if every submodule of mr is a homomorphic image of m. it is shown that if r is a right perfect ring, then every projective slightly compressible module mr is epi-retractable. if r is a noetherian ring, then every epi-retractable right r-module has direct sum of uniform submodules. if endomorphism ring of a module mr is von-neumann regular, then m is semi-...

This thesis describes the development of a knowledge-based system to evaluate forested land for availability of wildlife habitat. NED is an acronym derived from “Northeast Decision Model”. The NED DSS, a collection of software products, was created to help resource managers to build up goals, access current and potential conditions, and create long-term, landscape-level management plans for for...

Paphiopedilum armeniacum is level-one protected species. As the original habitat destruction, Paphiopedilum armeniacum is at the brink of extinction now. In order to monitor the environment of the endangered plants such as Paphiopedilum armeniacum, to master the real-time changes of their environment factors such as temperature, humidity, light intensity, the design is based on AT89C51, regarde...

A Graphical User Interface (GUI) was developed for a user-friendly implementation of a water depth correction model. The Interactive Data Language (IDL)-based tool provides the prospective users with an interface that can be applied to perform water depth correction on hyperspectral images that contain shallow water bodies containing benthic habitat information. Users can select a pixel or a su...

let $r$ be a commutative ring and $m$ be an $r$-module with $t(m)$ as subset,   the set of torsion elements. the total graph of the module denoted   by $t(gamma(m))$, is the (undirected) graph with all elements of   $m$ as vertices, and for distinct elements  $n,m in m$, the   vertices $n$ and $m$ are adjacent if and only if $n+m in t(m)$. in this paper we   study the domination number of $t(ga...

let r be a right gf-closed ring with finite left and right gorenstein global dimension. we prove that if i is an ideal of r such that r/i is a semi-simple ring, then the gorensntein flat dimensnion of r/i as a right r-module and the gorensntein injective dimensnnion of r/i as a left r-module are identical. in particular, we show that for a simple module s over a commutative gorensntein ring r, ...

Modular architectures have been increasingly favored for systems requiring some aspect of flexibility. A growing number of concepts, however, are being developed that have a specific kind of modular architecture in which the entire system is built of self-similar modules. In these systems each module or building block is identical (or very similar) either in external form, or both in form and f...

A finitely generated $R$-module is said to be a module of type ($F_r$) if its $(r-1)$-th Fitting ideal is the zero ideal and its $r$-th Fitting ideal is a regular ideal. Let $R$ be a commutative ring and $N$ be a submodule of  $R^n$ which is generated by columns of  a matrix $A=(a_{ij})$ with $a_{ij}in R$ for all $1leq ileq n$, $jin Lambda$, where $Lambda $ is a (possibly infinite) index set.  ...