Lucian Pârvulescu

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Widespread across Europe, the noble crayfish Astacus astacus has experienced many negative ecological and anthropogenic influences, mostly in western and northern Europe. We address the distribution and ecological affinities of this species in the geographical context of the Carpathian Danube basin, an area where these influences were limited and the(More)
Inland epigean freshwater amphipods of Romania are diverse and abundant for this region has a favourable geographical position between the Balkans and the Black Sea. Excluding Ponto-Caspian species originating in brackish waters and freshwater subterranean taxa, there are 11 formally recognized epigean freshwater species recorded from this country. They(More)
Native European crayfish, such as Astacus leptodactylus, are threatened, among other factors, by the crayfish plague agent Aphanomyces astaci, dispersed by invasive North American crayfish. Two of these invaders, Pacifastacus leniusculus and Orconectes limosus, have extended their distribution in the River Danube catchment; the latter was detected for the(More)
Invasion is one of the most consequential phenomena affecting the distribution of native species. Few in number of species, European crayfish are losing the competition with introduced North American crayfish. The spiny-cheek crayfish, Orconectes limosus, is an outstanding example, successfully competing against the native narrow-clawed crayfish, Astacus(More)
This paper presents a new control method for the Three-level Active Neutral Point Clamped (ANPC) converter. The advantages of this method are presented and a power loss analysis is made for an extreme modulation index. The results obtained are compared whit those obtained for two other control methods. Simulation and experimental results are presented in(More)
This paper presents an analysis and simulation of a Wind Turbine Generator (WTG) driving a low speed Permanent Magnet Synchronous Generator (PMSG). The results of the tests are obtained by using the PSIM computer simulation program. The voltage source PWM inverter is used to interface the system with the electrical utility that is simulated in this paper as(More)
This review summarises the main ecotonal properties of chalk hyporheic zone (CHZ), using a holistic approach on both structure and functionality of this habitat. The corroborated results suggest that the CHZ represents a typically shallow habitat (approx. 40–50 cm deep), with a homogenous distribution of both fauna and chemistry between heads and tails of(More)
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