Kosmos—1000 up

Derivations of UP-algebras by means of UP-endomorphisms

The notion of $f$-derivations of UP-algebras is introduced, some useful examples are discussed, and related properties are investigated. Moreover, we show that the fixed set and the kernel of $f$-derivations are UP-subalgebras of UP-algebras,and also give examples to show that the two sets are not UP-ideals of UP-algebras in general.

Monitoring the Built-up Area Transformation Using Urban Index and Normalized Difference Built-up Index Analysis

Makassar is one of the metropolitan cities located in Indonesia which recently experiences massive an increased construction because of population growth. Mapping the spatial distribution and development of the built-up region is the best method that can use as an indicator to set the urban planning policy. The purpose of this study is to identify changes in land use and density in Makassar Cit...

Production Scale Up of Nanofibers: A Review

Surgery in Cholesteatoma: Ten years Follow-up

Background: During last decades, many otologists attempted to make a long standing dry ear, resulting in better hearing after cholesteatoma surgery. This study evaluated the prognosis of two common methods of cholesteatoma ear surgery considering ten years follow-up. Methods: This retrospective analysis was done using medical records of 108 adult patients with cholesteatoma. After ten years of ...

Surgery in Cholesteatoma: Ten years Follow-up

Dear Editor, I was greatly interested in the article "Surgery in cholesteatoma: Ten years Follow-up" by Dr. M. Ajalloueyan published in your journal in March 2006; Vol 31, No 1: 37-40.I think there are grave misconceptions and many doubts about this article. That article has some misleading data that should be clarified by the author. The descriptions of table 1, "Statistical characteristics of...