Inscriere cercetatori

Premii Ad Astra

premii Ad Astra

Asociația Ad Astra a anunțat câștigătorii Premiilor Ad Astra 2022: http://premii.ad-astra.ro/. Proiectul și-a propus identificarea și popularizarea modelelor de succes, a rezultatelor excepționale ale cercetătorilor români din țară și din afara ei.

Asociatia Ad Astra a cercetatorilor romani lanseaza BAZA DE DATE A CERCETATORILOR ROMANI DIN DIASPORA. Scopul acestei baze de date este aceea de a stimula colaborarea dintre cercetatorii romani de peste hotare dar si cu cercetatorii din Romania. Cercetatorii care doresc sa fie nominalizati in aceasta baza de date sunt rugati sa trimita un email la cristian.presura@gmail.com

Publicatii proprii

Energy Dispersive X-Ray Fluorescence (EDXRF) Analysis of Steels

A powerful, simple and fast technique for non-destructive multi-element analysis of materials is energy dispersive X-ray fluorescence (EDXRF) technique. This method is based on radioisotope excited energy dispersive X-ray fluorescence (EDXRF) spectrometry and does not require any type-standards. For these reasons, the EDXRF method was chosen in this paper to analyse the different types of stainless steel (SS) samples. After non-destructive multi-element

Read more
Experimental Researches on the Corrosion Behavior and Microstructural Aspects of Heat Treated Al-Zn-Mg-Cu Alloys

The material for experiments was an aluminum alloys series 7xxx obtained by thermo-mechanical processing. We studied the influence of different artificial aging parameters on mechanical characteristic and corrosion of Al-Zn-Mg-Cu-alloy. The Al alloys was solution treated at 475 +/- 5 oC for 60 minutes, quenched in water 40-60oC and artificial aging at 120, 150, 180, 210oC at different time of aging (60, respectively 300, 540, 720 minutes). After

Read more
Poly(bisphenol A) cyanurate network modified with poly(butylene glycol adipate). Thermal and mechanical properties

A poly(bisphenol A)cyanurate (PCy) network was modified by a hydroxy-terminated oligoester, poly(butylene glycol adipate), PBGA, by polycyclotrimerization of bisphenol A dicyanate in the presence of the oligoester. The modified networks with PBGA content from 5 to 20% (w/w) were characterized by a combination of FTIR, DSC, TMA, TGA, impact testing and sol-gel analysis. It has been established that almost whole of the PBGA was chemically incorporated

Read more
Fabrication through P/M of ecological aluminum based composite materials. Part 1-Characterization and densification of mixture powders

The paper presents the experimental results concerning fabrication through powder metallurgy (P/M) of new ecological aluminum matrix composites (AMC) at a low cost for automotive industry applications. The difficult compaction and sintering of aluminum powder products and especially of powders from aluminum composite mixtures reinforced with hard ceramic particles require complex phenomenon's analysis which occurs during materials' fabrication. Thus

Read more
Physical and Quantitative Microstructural Analysis of Sintered Al-Cu/SiCp Composites

Al-Cu matrix composite materials with 5-20 wt. proportions of SiC hard particles and unreinforced Al-Cu alloys obtained by powder metallurgy (P/M), in the same homogenization (20 r.p.m., about 7 hours)- pressing (450 MPa for composites) - presintering (300-420 degrees C/30 min/H(2)) conditions but at different sintering temperatures (520-620 degrees C/60min/H(2), furnace cooling) were analyzed in terms of microstructural and physical characteristics.

Read more
Theta-monotone operators and theta-convex functions
Disc–jet coupling in the 2009 outburst of the black hole candidate H1743-322

We present an intensive radio and X-ray monitoring campaign on the 2009 outburst of the Galactic black hole candidate X-ray binary H1743-322. With the high angular resolution of the Very Long Baseline Array, we resolve the jet ejection event and measure the proper motions of the jet ejecta relative to the position of the compact core jets detected at the beginning of the outburst. This allows us to accurately couple the moment when the jet ejection

Read more
The Determinants of Bank Efficiency and Productivity Growth in the Central and Eastern European Banking Systems
A novel p38-MAPK signalling axis modulates neutrophil biology in head and neck cancer
EGFR-specific T cell frequencies correlate with EGFR expression in head and neck squamous cell carcinoma