The present study wants to identify the making technique of an early historic pottery type Bangladesh and for this research potshard samples were collected from archaeological excavated site with documented stratigraphic data. used method analysis is known as ‘Polished thin-section’ which now commonly using petrographic in modern world. Another important aspect experiment reproduction same qual...

The inevitable depletion of mineral resources, the constant deterioration of the geological and mining conditions for the development of mineral deposits and the restoration of raw materials from mining waste by recycling are all urgent problems we face today. The solution to this problem may ensure: a considerable extension of raw material source; decrease of investments in opening new deposit...

The colour plate which appears in this number of the Canadian Mineralogist iliustrates the advantage of microscopic observation of mineralized rocks in polished thin-section by incident and transmitted cross-polarized light simultaneously: the identities and relationships of opuqrr" and translucent minerals in contact are immediately evident. The principle is not ne.w; more than a hundred years...

Let Q be Robinson’s weak theory of arithmetic. We use recursiontheoretical methods to show that Q is essentially undecidable. Consequently, any recursively axiomatizable theory in which Q is interpretable is undecidable and incomplete. This is a strengthening of theorems of Gödel, Rosser and Tarski. We also present proofs of Gödel’s First and Second Incompleteness Theorems. In these proofs, the...

The architecture of our original setup is briefly reviewed in Section 2. The recent success of the two-juggle could not have been achieved without the enhancements to the vision system that we describe in Section 3. Although the working enhancements were developed in an ad hoc manner and implemented through a process of empirical trial and error, we suspect that the resulting system (or, a t le...