Wyniki wyszukiwania - BazTech

1

O remontowaniu i modernizacji mostów na Ukrainie

Kwasza W., Melnyk I., Salijczuk L.

Inżynieria i Budownictwo

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2005

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R. 61, nr 4

196-199

PL

Na Ukrainie istnieje ponad 16 tys. mostów i wiaduktów, w tym 93% małych (do 25 m). Omówiono rozwiązania konstrukcyjne ustrojów nośnych obiektów mostowych oraz stosowane sposoby ich remontów i modernizacji.

EN

There is more than 16 thousand bridges and viaducts, mostly of small spans up to 25 m, in Ukraine. The bridges load bearing structures and applied methods of its repair and modernization is described.

2

Structure types formed in the Ln-Al-{Si, Ge} systems.

Melnyk I., Pikus S., Kuprysyuk V., Semuso N., Gladyshevskii R.

Archives of Materials Science

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2005

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Vol. 26, nr 4

279-301

EN

This paper reviews the different structure types observed for alumosilicides and alumogermanides of rare earth metals. The analysis is based mainly on the coordination polyhedra around the atoms of the smallest size and on the stacking of segments cut from simple structure types. The 24 different structure types in which the 145 known rare-earth alumosilicides and alumogermanides can be crystallized are described in detail.

3

Phase diagrams of the Ln-Al-{Si, Ge} systems

Melnyk I., Pikus S., Semus'o N., Gladyshevskii R.

Archiwum Nauki o Materiałach

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2004

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T. 25, nr 2

113-131

EN

This paper gives a detailed review of the current status of investigations of the phase diagrams of Ln-Al-(Si, Ge) systems. The authors present 16 partial isothermal cross-sections of phase diagrams of Ln-Al-Si systems, where Ln=La, Ce, Pr, Nd, Eu, Gd, Tb, Ho, Y, and Ln-Al-Ge, where Ln=La, Ce, Pr, Sm, Gd, Tb, Y. The maximum amount of rare-earth metal in the different investigations is 50at.%. For some compounds, the homogeneity ranges are shown. A table indicating the structure type adopted by each of the 145 ternary rare-earth alumosilicides and alumogermanides, for which the crystal structure has been determined, is presented.

PL

W pracy przedstawiono szczegółowy przegląd dotychczasowych badań równowag fazowych układów Ln-Al- (Si, Ge). Uwzględniono zarówno publikowane dane literaturowe jak i wyniki prezentowane na konferencjach naukowych. Zaprezentowano 16 izotermicznych wykresów równowag fazowych dla następujących układów: Ln-Al-Si (gdzie Ln=La, Ce, Pr, Nd, Eu, Gd, Tb, Ho, Y) i Ln-Al-Ge (gdzie Ln=La, Ce, Pr, Sm, Gd, Tb, Y). Zawartość lantanowca wynosiła do 0,50 ułamka atomowego. Dla niektórych związków przedstawiono zbadane zakresy homogenizacji. Zamieszczono w pracy listę wszystkich 145 potrójnych glinokrzemków i glinogermanków metali ziem rzadkich, dla których określono strukturę.

4

Porous silicon in solar cell structures

Yerokhov V., Melnyk I., Tsisaruk A., Semochko I.

Opto-Electronics Review

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2000

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Vol. 8, No. 4

414-417

EN

The purpose of the present paper was technology development of generation of efficient and cost - effective porous silicon (PS) based antireflection coating (ARC), which would be the best adapted to the silicon solar cell (SC) processing sequence. Owing to optimisation of anodisation process conditions an average reflection coefficient of PS in the range of 400-1000 nm was decreased to 7.59% for porous layers, grown on a polished surface, and to 1.72% for layers that were grown on textured surface. Minimisation of optical losses allowed improving short circuit current by over than 50% for mono- and multicrystalline SC that had PS based ARC formed on the frontal surface. Under this, the increment of efficiency of these SCs was 31% and 22%, correspondingly. However, the revealed decrease in the SC open-circuit voltage with PS layer by 2.5% gives the evidence on insufficient improvement and stabilisation of passivating properties of the porous layer.