34,656 research outputs found
The 2D/3D dynamics of wall-bounded low-Rm magnetohydrodynamic (MHD) turbulence
No full textWith this experimental study, we give evidence that the dynamics of low-Rm MHD turbulence depends on the diffusion length l_z, which corresponds to the distance over which the Lorentz force is able to diffuse momentum before it is balanced by inertia
Film Prepared by Atomic Layer Deposition and Its Research in Resistive Random Access Memory
No full text以等离子体增强原子层沉积(PE-ALD)技术生长氮氧化铝()薄膜,磁控溅射Ag上电极制备结构为Ag//Pt的阻变存储器(RRAM).器件呈现双极性阻变特性,正向开启电压稳定且分布窄,变化幅度集中在0.5; V的范围内.高阻态和低阻态电阻之比超过,并具有免激活特性.低温测试表明,器件的低阻态电阻和温度正相关,说明了阻变的机制为银导电细; 丝的形成和断裂. film deposited by; plasma-enhanced atomic layer deposition(PE-ALD) and Ag electrode; sputtered by magnetron sputtering are used to fabricate resistive random; access memory (RRAM) devices with a structure of; Ag//Pt. The device can be; resistively switched in the bipolar mode with the set voltages; distributed in a narrow range of 0. 5 V.The high/low resistance ratio; lies beyond .The device is also found to be; electroforming-free.Low-temperature I-U measurement show that the; resistance of the ohmic low resistance state is positively proportional; to the temperature,suggesting the metallic filament property.The; switching mechanism of the device is explained by the formation and; therupture of the Ag filaments in; films.福建省自然科学基金; 厦门大学校长基
Il ricorso straordinario per eseguire le sentenze della Corte Edu
No full textA distanza di più di vent’anni dalla Raccomandazione R (2000) 2 del 19 gennaio 2000 del Comitato dei Ministri del Consiglio d’Europa, il d. lgsl. n. 150/2022 ha finalmente introdotto un nuovo, autonomo ricorso straordinario per l’esecuzione del giudicato di
Strasburgo. Si chiude così la lunga parentesi di supplenza pretoria culminata con l’intervento additivo di cui alla sentenza costituzionale n. 113/2011 e l’introduzione della c.d. “revisione europea”.
Ne risulta riaffermato con forza il principio di legalità processuale; al tempo stesso, però, si aprono prospettive inedite circa il ruolo e le tendenze evolutive del sindacato de legitimitate
Atlasul resurselor energetice eoliene al RM
Get PDFLansat în cadrul Expoziției internaționale „Moldenergy - 2017”, Atlasul resurselor energetice eoliene al RM, elaborat de cercetătorii UTM Ion SOBOR, Andrei CHICIUC, Vasile RACHIER în cadrul Proiectului „Servicii științifice și tehnice în inginerie privind realizarea campaniei de măsurări a caracteristicilor vântului, elaborarea și editarea Atlasului resurselor energetice eoliene al RM”, este un pionierat pentru domeniul resurselor energetice eoliene de la noi, având un ecou local și internațional pe măsură
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Investigation of an automated system for estimating people's density using infra-red thermal imaging
No full textThere is a need for on-line information regarding people's densities and numbers when organising mega events. This is to enable the decision makers to have the most precise and updated information in order to take the right decision regarding safety issues, services, organisation of people and traffic. Human-based monitoring system could include high percentage of human error due to personal perception, change of view angle and tiredness. Therefore, for on-line monitoring system there is a need for automation. This study investigates the use of low-resolution infrared technology combined with video images as a tool to estimate people's numbers and densities. The initial results found demonstrate that the suggested infrared techniques are very promising for automated monitoring system
Proton-unbound states in relevant for the reaction in novae
Get PDFBackground: The nucleosynthesis of several proton-rich nuclei is determined by radiative proton-capture reactions on unstable nuclei in nova explosions. One such reaction is , which links the NeNa and MgAl cycles in oxygen-neon (ONe) novae.
Purpose: To extract resonance strengths from a study of proton-unbound states in , produced via the Mg(He,) reaction.
Methods: A beam of ions at 50.7 MeV was used to produce the states of interest in Al. Proton-triton angular correlations were measured with a QDD magnetic spectrometer and a silicon detector array, located at iThemba LABS, South Africa.
Results: We measured the excitation energies of the four lowest proton-unbound states in Al and place lower-limits on values for these four states. Together with shell-model calculations of partial gamma widths, the experimental data are also used to determine resonance strengths for the three lowest resonances.
Conclusions: The energy of the dominant first resonance is determined to be keV, with a resonance strength meV.Accepted for Publication in Physical Review
Bond-orientational order in liquid aluminium-transition metal alloys
No full textThe structures of liquid AlMn and AlNi are simulated by molecular dynamics using interatomic potentials derived from neutron diffraction data. For these two alloys, the generated three dimensional particle configurations are consistent with the experimental partial pair correlation functions. The characterization of the local symmetries by both the construction of the Voronoï polyhedra and the calculation of the second-order invariants of spherical harmonics allows us to confirm the existence of a local icosahedral order in the quasicry stal -form i ng liquid AlMn and its absence in liquid AlNi about 70 K above the liquidus line. Molecular dynamics simulations of the corresponding supercooled liquids show that this order increases strongly for AlMn and starts to develop for AlNi. An improvement of the agreement between the experimental and calculated pair correlation functions by the reverse Monte Carlo method yields liquid configurations characterized by the same most frequently observed Voronoï polyhedra as those obtained in the molecular dynamics configurations, but with lower percentages
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Smart restraint systems utlizing low cost infrared sensing
No full textThis paper describes the utilisation of embedded sensors for the development of intelligent mail processing machines. Low-cost Infrared imagers are used to monitor the health of machines. The machines are linked through the Internet, via standard protocols, to maintenance centres where the embedded intelligence is linked with remote surveillance and autonomous agents for predicting and requesting maintenance. The results described in this paper demonstrate that utilising embedded mechatronic systems with IT components leads to greater flexibility and higher machine intelligence for remote diagnostic system
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