Wyniki wyszukiwania - BazTech

1

Work on the modification of the structure and properties of Ti6Al4V titanium alloy for biomedical applications

Klimas J., Łukaszewicz A., Szota M., Laskowski K.

Archives of Materials Science and Engineering

|

2016

|

Vol. 78, nr 1

10--16

EN

Purpose: The paper attempts to improve the properties of Ti6Al4V titanium alloy by the using of the injection casting method with rapid cooling. The comparison of the structure and properties of the Ti6Al4V titanium alloy formed by two methods: the injection casting under pressure in two variants under air and vacuum with using a rapid cooling and purchased commercially were carried out. Design/methodology/approach: Samples were produced by two methods: unconventional casting by injection under pressure of gas or vacuum to copper mold with rapid cooling, and a traditional method for the production of titanium alloys in a form of a rod. To achieve the pursued objective the following tests were performed: microstructural observations – light microscope and SEM, corrosion resistance tests, microhardness tests – Vickers method. Findings: Microstructural observations showed that the Ti6Al4V titanium alloy produced by injection casting method under pressure with rapid cooling is able to produce extremely fine-grained layer and ductile core. That distribution of structures significantly affect on the improvement of a number of properties compared to commercially produced material. Moreover, during process increased corrosion resistance was observed. Those properties have a significant impact on the possibility of using that type of a production method and material in many areas of materials science related with medicine. Research limitations/implications: In the framework of the studies, tests using living tissues, which would allow to determine whether the produced material is biocompatible and does not cause inflammation, have not been conducted. Practical implications: The application of injection casting carries some complications, which mainly relate to quartz capillary where ingot is melted. Titanium as a reactive element strongly absorbs silicon out of the capillary causing changes in the chemical composition in the surface layer of the final element. Further studies will be attempted to use a different type of material wherein the alloy will be melted. Originality/value: The paper presents the improvement of the properties of materials produced under pressure by casting injection, compared to the same material produced by a commercial method.

2

PORR Polska Infrastructure SA - stawiamy na dywersyfikację, także geograficzną

Karpiński-Rzepa M., Laskowski K.

Nowoczesne Budownictwo Inżynieryjne

|

2015

|

Nr 5

28--32

PL

Wywiad z Krzysztofem Laskowskim, dyrektorem ds. technicznych oddziału mostowego PORR Polska Infrastructure SA.

EN

Krzysztof Laskowski, Engineering Director of the bridge division of PORR Polska Infrastructure SA, interviewed by Mariusz Karpiński-Rzepa.

3

Wykorzystanie technologii CUDA do kompresji w czasie rzeczywistym danych pochodzących z sonarów wielowiązkowych

Chybicki A., Laskowski K., Muszyński M.

Zeszyty Naukowe Wydziału ETI Politechniki Gdańskiej. Technologie Informacyjne

|

2010

|

T. 19

127-132

PL

W pracy przedstawiono projekt oraz implementację systemu przeznaczonego do kompresji danych z sonarów wielowiązkowych działającego z wykorzystaniem technologii CUDA. Omówiono oraz zastosowano metody bezstratnej kompresji danych oraz techniki przetwarzania równoległego. Stworzoną aplikację przetestowano pod kątem szybkości i stopnia kompresji oraz porównano z innymi rozwiązaniami umożliwiającymi kompresję tego typu informacji.

EN

Recently, multibeam echosounders capable of logging, not only bathymetry focused data, but also the full water-column information have become available. Unlike using bathymetric multibeam sonars, which only capture the seafloor, utilizing full water-column multibeam systems capabilites results in acquiring very large data sets during hydrographic or scientific cruises. The paper presents the concept of algorithms dedicated for reduction of multibeam sonar datasets based on aplying multi-threaded architecture implemented in Graphical Processing Units (GPU). We presented the advantages of utilizing nVdia CUDA technology in the context of efficiency of compression and obtained data reduction ratio.

4

Variability of engineering geological parameters in flood facies sediments

Kraużlis K., Laskowski K., Wójcik E.

Geological Quarterly

|

2003

|

Vol. 47, No 1

63-68

EN

Flood-deposited, muds are characterised by considerable variability of their lithological characters. This variability reflects the development of the river forming the terrace, the geological setting of the drainage basin and the morphology of the flood plain. The lithological variability of the muds causes great vertical and lateral variability in the engineering geological parameters. Therefore all calculations based on mean values obtained from laboratory analyses are prove to error. The most reliable values of parameters are obtained from fieldwork "in situ".