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19.750  Articles
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In this work, we ?rst introduced one parameter dual Lorentzian spherical motions in three dimensional dual Lorentz space D^3_1 and spacelikeand timelike ruled surfaces in three dimensional Lorentz space IR^3_1 corresponding to dual curves on dual Lorentz ... see more

 In this work, new type ruled surfaces in terms of B- Smarandache TM1 curves of biharmonic B- slant helices in the SOL3 are studied. We characterize the B- Smarandache TM1 curves in terms of their Bishop curvatures. Additionally, we express some inte... see more

In this paper, the sectional curvature of non-degenerate tangent sections of time-like ruled surface with the central ruled surface in n-dimensional Minkowski space, R_1^n  is studied. The relationship between normal sectional curvature and the princ... see more

We construct a developable surface normal to a surface along a curve on the surface. As differs from the work Hananoi, we choose the curve as the normal direction curve on which the new surface is formed in Euclidean space. We obtain some results about th... see more

In this paper, the sectional curvature of non-degenerate tangent sections of time-like ruled surface with the central ruled surface in n-dimensional Minkowski space, R_1^n  is studied. The relationship between normal sectional curvature and the princ... see more


"In the beginning He created the heavens and the earth, the earth was formless and empty; pitch darkness covered the great oceans, and the Spirit of God drifted over the surface of the earth '(Genesis 1: 1). chaotic "or" irregular. "(Warren Baker, Study O... see more

The early history of the mouldboard plough – from the Late Roman Iron Age to the Middle AgesUntil quite recently, the introduction of the mouldboard plough to Denmark was seen as being closely linked to a new efficient Medieval cultivation system, the ope... see more

Flint knives from Late Bronze AgeMost flint tools from the Late Bronze Age are characterized by fortuitousness and technological opportunism, and very few can be grouped in stereotype forms as the ones known from earlier prehistoric periods. However, a si... see more

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