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Publicatii proprii
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8×10^6 positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to aprox.250GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. The positron fraction spectrum shows
Read moreA critical study of the emergence of glass and glassy metals as “green” materials
The work reported in this paper discusses the importance of glass and metallic glasses as environmen- tal friendly materials and also provide some points of view about the future influenceof these materials for the related fieldsof industrial engineering and industrial ecology.The environmental capabilities of metallic glasses (MGs),which are consider ed to be among the impo rtant materials of the future,have not been sufficientlyinvestigated.However,some
Read moreVolumetric study for the binary nitromethane with chloroalkanes mixtures at temperatures in the range (298.15 to 318.15) K
The results of the density measurements for the pair systems containing nitromethane with 1,1,2,2-tetrachloroethane, 1,1,1-trichloroethane, chloroform, 1,2-dichloroethane, 1,3-dichloropropane, 1,4-dichlorobutane, 1-chlorobutane and 1-chloropentane at T = (298.15, 308.15, 318.15) K and atmospheric pressure, on entire compositional range are reported. The derived excess molar volumes, VE, are positive for the nitromethane + 1,1,1-trichloroethane, +
Read moreANALYSIS OF COMPETITIVENESS IN TOURISM SECTORS WITHIN CENTRAL AND EASTERN EUROPE: ROMANIA CASE STUDY
Coherent States and Their Role in Quantum Information Theory
The qubit, i.e. the fundamental unit of information in the quantum theory of information (QIT), can be expressed through the coherent states (CSs). Consequently, a message, i.e. a sequence of qubits, is a tensor product of CSs. For ensembles of qubits, it must use the density operator (DO), which can be written also in the CSs representation
Read moreA Quantum Hydrodynamic Model for a Photovoltaic Cell
We present a theoretical model for the behaviour of the propagation of electrons in a photovoltaic cell with some Bohm quantum potential corrections. The system describes the dynamic of the electron density and the current density functions. Also, a numerical solution for the 1‐dimensional case based on the backward finite differences method is given.
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