Articole ştiinţifice: Recent submissions

Now showing items 1961-1980 of 4684

Mixed exciton–plasmon collective elementary excitations of the Bose–Einstein condensed two-dimensional magnetoexcitons with motional dipole moments

MOSKALENKO, S. A.; LIBERMAN, M. A.; SNOKE, D. W.; DUMANOV, E. V.; RUSU, S. S.; CERBU, F. (Springer Nature Switzerland, 2013)

The collective elementary excitations of two-dimensional magnetoexcitons in aBose-Einstein condensate (BEC) with wave vector k = 0 wereinvestigated in the framework of the Bogoliubov theory of quasiaverages. The Hamiltonianof ...
Mixed exciton–plasmon collective elementary excitations of the Bose–Einstein condensed two-dimensional magnetoexcitons with motional dipole moments

DUMANOV, E. V.; LIBERMAN, M. A.; MOSKALENKO, S. A.; NOVIKOV, B. V.; RUSU, S. S. (John Wiley & Sons, Inc., 2013)

The collective elementary excitations of the two-dimensional (2D) magnetoexcitons in the state of their Bose–Einstein condensation (BEC) with nonzero wave vector k and inplane parallel oriented motional dipole moments are ...
Light Absorption and Hyper-Raman Scattering by Many-Electron Complexes in Quantum Well Structures

BOBRYSHEVA, A. I.; RUSSU, S. S.; ZALOI, V. A. (John Wiley & Sons, Inc., 1988)

It is shown that in GaAs/AlxGa1-xAs multiple-quantum well structures bihole formation is possible. Also the main features of biexciton hyper-Raman scattering are established.
Induced coherent macroscopic states of excitons and biexcitons in a microcavity-embedded Zn1−xCdxSe-type quantum well

BOBRYSHEVA, A. I.; MOSKALENKO, S. A.; RUSSU, S. S. (Elsevier, 2000)

The conditions of induced and spontaneous Kosterlitz–Thouless-type Bose–Einstein condensation (BEC) of excitons and biexcitons in a microcavity-embedded quantum well are discussed. As an example the Zn1−xCdxSe/ZnSe quantum ...
Fizica la absolvirea instituţiilor de învăţămînt preuniversitar. 1. România

MARINCIUC, Mihai; PIRŢAC, Constantin; RUSU, Spiridon (Institutul de Inginerie Electronică şi Nanotehnologii "D. Ghiţu", AŞM, 2011)

Acum când Republica Moldova tinde să se apropie de Uniunea Europeană, este util să se compare situaţia de la noi cu cea de acolo în diverse domenii de activitate umană. Noi vom aborda doar o problemă din domeniul învăţămîntului, ...
Динамика нелинейного кольцевого резонатора: возбудимость и когерентный резонанс

ТРОНЧУ, В. З.; АБРАМ, Р. А.; РУСУ, С. С.; БАРДЕЦКИЙ, П. И. (Российская академия наук, 2007)

Рассмотрены явления возбудимости и когерентного резонанса в нелинейном кольцевом резонаторе в присутствии экситонов и биэкситонов. Бифуркационный анализ динамики кольцевого резонатора указывает на существование как ...
Complex dynamics of quantum dots lasers under the influence of external multiple optical feedback

OLOINIC, T.; RUSU, S.; TRONCIU, V. (Institutul de Fizică Aplicată al AŞM, 2018)

We report in this paper the numerical results on the dynamical behaviour of a semiconductor laser with quantum dots active medium under the influence of multiple external optical feedback.
Collective elementary excitations of two–dimensional magnetoexcitons interacting with plasmons under the influence of excited Landau levels

MOSKALENKO, S. A.; LIBERMAN, M. A.; SNOKE, D. W.; DUMANOV, E. V.; RUSU, S. S.; CERBU, F. (Institutul de Fizică Aplicată al AŞM, 2012)

The energy spectrum of the collective elementary excitations consists of two exciton-type branches (energy and quasienergy branches), each of them with an energy gap and a roton-type region, from the gapless optical plasmon ...
Theory of anticipated synchronization of DFB laser with passive dispersive reflector

TRONCIU, V. Z.; RUSU, S. S.; ROTARU, A. H. (Institutul de Fizică Aplicată al AŞM, 2012)

We discuss the phenomena of anticipated synchronization in a DFB lasers with a passive dispersive reflector. A rate equation model is proposed. It is shown that under certain conditions the system of two lasers coupled in ...
Bose-Einstein condensation in the two-component non-linear exciton gas

MOSKALENKO, S. A.; BOBRYSHEVA, A. I.; RUSSU, S. S.; BALTAGA, V. V.; LELYAKOV, A. V. (IOP Publishing, 1985)

The statistical properties of non-linear two-component ortho-para exciton gas are considered, employing the Bogoliubov variational principle and the mean-field approximation. The exciton concentrations are determined from ...
Anticipated synchronization of semiconductor lasers with passive dispersive reflectors

CIOBANU, Nellu; RUSU, Spiridon; TRONCIU, Vasile (Editura Academiei Romane, 2017)

We explore a new model for anticipated synchronization of distributed feedback lasers with passive dispersive reflectors. The influence of device parameters on the anticipated synchronization is discussed. The conditions ...
A Full Single-Quantum Radiative Recombination of Biexcitons Due to Exciton—Biexciton Interaction

PETRASHKU, K. G.; RUSSU, S. S.; KHADZHI, P. I. (John Wiley & Sons, Inc., 1980)

The single-quantum annihilation process of the biexciton as a whole at the inelastic collision of the biexciton with an exciton is studied. Analytic expressions for the spectral and temperature dependence of the transition ...
Study of piezoelectrycity in structures based on nanofibrous ZnO layers and polysilane

GHIMPU, L.; COJOCARU, V.; SOROCEANU, M.; SACARESCU, L.; KATASHEV, A.; HARABAGIU, V.; TIGINYANU, I. (IEEE, 2012)

Zinc oxide films were deposited by method rf magnetron sputtering in a mixed environment of oxygen and argon on two types of substrates, glass and silicon substrates with different orientations, by varying the deposition ...
Signals evaluation of a chaotic generator-based sensor for environment conductometric measurements

COJOCARU, Victor (IEEE, 2015)

We describe the evaluation of a new conductometric and impedancemetric sensor based on nonlinear dynamics in the determination of the water pollution with salts at very low concentrations. The sensor is based on the change ...
Fuzzy logic algorithm for use in controlled hypothermia

COJOCARU, Victor; VRABII, Daniel (IEEE, 2015)

We analyze a device designed to perform therapeutic hypothermia in the skull. This device is proposed for use in hospitals profile especially for rapid intervention crews. The cooling device uses Peltier elements that allow ...
Fuzzy controlled system for hypothermic Brain therapy

COJOCARU, Victor; MARDARI, Vladimir (The Publishing House of the Romanian Academy, 2014)

We propose a device for therapeutic hypothermia implemented with Peltier elements controlled by a microcontroller, operated from a guided user interface. The control is based on fuzzy logic and aims at keeping a low ...
Characterizing the attractors of chaotic systems by a direct measurement method

TEODORESCU, H. N.; HULEA, M.; COJOCARU, V. (IEEE, 2014)

Due to the high sensitivity to internal parameters, the operation of the chaotic systems may couple strongly to the ambient and are apt to detect small variations of external factors that influence the internal ones. We ...
Biomimetic Chaotic Sensors for Water Salinity Measurements and Conductive Titrimetry

TEODORESCU, Horia-Nicolai L.; COJOCARU, Victor P. (IEEE, 2012)

We present a simple sensor based on chaotic dynamics for the determination of water salinity. The sensor is based on the change in dynamics produced in a nonlinear dynamic circuit, which has a circuit element composed of ...
The nature of processes controlling the kinetics of indium oxide-based thin film gas sensor response

KOROTCENKOV, Ghenadii; BRINZARI, Vladimir; STETTER, Joseph R.; BLINOV, Iuri; BLAJA, Valeriu (Elsevier, 2007)

This paper analyzes the processes controlling the rate of conductivity response of In2O3-based thin film sensors to both reducing and oxidizing gases. In2O3 films with a thickness from 20 to 400nm were deposited using a ...
Tuning Controllers in the Multiple-Loop Feedback Control System to the Objects with Inertia, Time Delay and Non Minimal Phase

COJUHARI, Irina (IEEE, 2010)

This paper proposes a tuning algorithm of linear controllers P, PI, PID in the multiple-loop feedback control systems. The control object consists of two subprocesses, which are described by the dynamical models with inertia ...

Now showing items 1961-1980 of 4684

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