Analysis of results from current collector monitoring system under real traffic conditions on a railway line

W celu oceny stanu technicznego odbieraków prądu prowadzone jest ich monitorowanie podczas przejazdu pociągu przez stanowisko kontrolne na linii kolejowej. Stanowisko monitoringu rejestruje uniesienie przewodów jezdnych wywołane oddziaływaniem odbieraka, prędkość pojazdu i jego dane identyfikacyjne. Na podstawie pomiarów i kryteriów oceny następuje klasyfikacja stanu technicznego odbieraków. Przeprowadzono weryfikację wyników monitoringu. Podano zestawienie statystyczne prowadzonych pomiarów

The microstructure and thermal properties of Yb2SiO5 coating deposited using APS and PS-PVD methods

Purpose: The new ceramic material for Enviromental Barrier Coatings (EBC) on ceramic material was developed. Design/methodology/approach: The ytterbium monosilicate was deposited using two methods: atmospheric plasma spray (APS) and plasma spray physical vapour deposition (PS-PVD). Findings: Obtained coating was characterized by dense structure and columns typically formed in PS-PVD process were not observed. In comparison with APS-deposited coating, in this method, both elements segregation and formation of ytterbium oxide occurred. Research limitations/implications: The further research for production of columnar coatings will be necessary. Practical implications: Developed coatings migh be used for next generations of ceramic materials used for gas turbine and jet engine blades and vanes as a high temperature and corrosion protection. Originality/value: The first time the ytterbium monosilicate was produced bot by APS and LPPS methods

Large plexiform neurofibroma on right thigh of a farmer in the course of Recklinghausen disease - Case report

A 59-year-old farmer was admitted to the Department of Trauma Surgery because of pain associated with the presence of a tumour on the side of the right thigh. The patient stated that his biggest problem was great difficulty in moving and handling agricultural machinery due to the aforementioned lesion. On physical examination, the patient presented with numerous cutaneous and subcutaneous neurofibromas, as well as one large plexiform neurofibroma. Diagnosis of Neurofibromatosis type 1 was established, based on National Institutes of Health diagnostic criteria. Moreover, molecular genetic testing found known pathogenic mutation p.Arg1769* in one of the alleles of NF1 gene (heterozygote), typical for Recklinghausen disease. The big plexiform neurofibroma in the patient was not operated on because of lung cancer