Features of radiation impact on nanostructured materials
Features of formation and migration of radiation-induced defects in carbon nanotubes (CNT) and nanostructured materials are examined. The main methods and software tools used for the simulating nanomaterial structure and space factors are described. The results of mathematical simulation are presented.
This paper presents a new approach to designing integrated simulation models for large corporations. This approach is based on the use of system-dynamics methods for implementing models of segments of the vertically integrated company taking into account the available direct and feedback links. All models have been designed with the help of power simulation tool - Powersim Studio. In addition, the designed simulation system has been integrated with created genetic algorithm and the corporate data warehouse.
This paper presents the simulation tool for study future ATM systems, based on advanced CNS capabilities. Research Stand for hardware-in-the-loop and human-in-the-loop simulation of Air Traffic Management System is the simulation tool, which includes on-board and ground-based components of the air traffic management system. Due to wide range of integrated components the Stand allows studying advanced concepts and technologies of the whole air traffic management system. The Stand allows running simulation in fast-time and real-time modes. Fast time simulation is applied to the long-term experiments. During this simulation all components work in automatic mode. Real-time human-in-the-loop simulation runs to demonstrate functional interaction between ATM components. The main goals of the researches, conducted on the stand, are: • approbation of pilot and air traffic controller interaction; • approbation of new cockpit and ATC system interfaces; • approbation of new airborne functions; • assessment of changes in air traffic characteristics in case of using CNS capabilities .
It is well recognized that excessive ice accumulation at low-temperature conditions can cause significant damage to civil infrastructure. The passive anti-icing surfaces provide a promising solution to suppress ice nucleation and enhance ice removal. However, despite extensive efforts, it remains a challenge to design anti-icing surfaces with low ice adhesion. Using all-atom molecular dynamics (MD) simulations, we show that surfaces with single-walled carbon nanotube array (CNTA) significantly reduce ice adhesion due to the extremely low solid areal fraction. It was found that the CNTA surface exhibits up to a 45% decrease in the ice adhesion strength in comparison with the atomically smooth graphene surface. The details of the ice detachment from the CNTA surface were examined for different water-carbon interaction energies and temperatures of the ice cube. Remarkably, the results of MD simulations demonstrate that the ice detaching strength depends linearly on the ratio of the ice-surface interaction energy and the ice temperature. These results open the possibility for designing novel robust surfaces with low ice adhesion for passive anti-icing applications.
I. The simulation and research into advanced airborne CNS procedures was conducted by the Research Stand for Hardware-in-the-Loop Simulation of Air Traffic Control Systems (KIS UVD) in 2013–2014. II. As part of the research, the following CNS procedures were reviewed: • ITP (In-Trail Procedure) • FIM (Flight-Deck Interval Management) • ACM (Airborne Conflict Management). III. Real-time simulation was conducted with the participation of ATC workstation operator, operator of the advanced cockpit DKS IMA simulator and pilot workstation operator. IV. The research into CNS procedures was conducted using fast-time simulation in automatic mode without operator's participation. V. As part of the work • the cooperation of pilot and ATC during advanced CNS procedures was approbated • the interfaces of CNS procedures for pilot and ATC were tested • performance approbation of CNS procedures in high air traffic conditions with the impact of random factors was held • the quantity characteristics of changes in performance caused by using new CNS procedures were calculated • CNS procedures were compared with standard procedures VI. The results show • Improved performance and prospects using new CNS procedures • KIS UVD stand practicability for simulation and research of airborne and ATC procedures • Need for future research of CNS procedures VII. The future research trends are: • The research of airborne procedures in different air traffic intensity and in conditions where one part of aircrafts is equipped with ADS-B-, ITP-, FIM-, ACM avionics and another part is not equipped • The research of FIM procedure on STAR • The simulation and research of other ADS-B-based procedures (ASIA, SURF) • The research into airborne procedures, connected with weather hazard avoidance • The research into airborne procedures using the real air traffic.
This book presents research dedicated to solving scientific and technological problems in many areas of electronics, photonics and renewable energy. Progress in information and renewable energy technologies requires miniaturization of devices and reduction of costs, energy and material consumption. The latest generation of electronic devices is now approaching nanometer scale dimensions; new materials are being introduced into electronics manufacturing at an unprecedented rate; and alternative technologies to mainstream CMOS are evolving. The low cost of natural energy sources have created economic barriers to the development of alternative and more efficient solar energy systems, fuel cells and batteries.
Nanotechnology is widely accepted as a source of potential solutions in securing future progress for information and energy technologies. Nanoscale Materials and Devices for Electronics, Photonics and Solar Energy features chapters that cover the following areas: atomic scale materials design, bio- and molecular electronics, high frequency electronics, fabrication of nanodevices, magnetic materials and spintronics, materials and processes for integrated and subwave optoelectronics, nanoCMOS, new materials for FETs and other devices, nanoelectronics system architecture, nano optics and lasers, non-silicon materials and devices, chemical and biosensors,quantum effects in devices, nano science and technology applications in the development of novel solar energy devices, and fuel cells and batteries.
Generalized error-locating codes are discussed. An algorithm for calculation of the upper bound of the probability of erroneous decoding for known code parameters and the input error probability is given. Based on this algorithm, an algorithm for selection of the code parameters for a specified design and input and output error probabilities is constructed. The lower bound of the probability of erroneous decoding is given. Examples of the dependence of the probability of erroneous decoding on the input error probability are given and the behavior of the obtained curves is explained.
The dynamics of a two-component Davydov-Scott (DS) soliton with a small mismatch of the initial location or velocity of the high-frequency (HF) component was investigated within the framework of the Zakharov-type system of two coupled equations for the HF and low-frequency (LF) fields. In this system, the HF field is described by the linear Schrödinger equation with the potential generated by the LF component varying in time and space. The LF component in this system is described by the Korteweg-de Vries equation with a term of quadratic influence of the HF field on the LF field. The frequency of the DS soliton`s component oscillation was found analytically using the balance equation. The perturbed DS soliton was shown to be stable. The analytical results were confirmed by numerical simulations.
By using superconducting quantum interference device (SQUID) magnetometry, we investigated anisotropic high-field (H less than or similar to 7T) low-temperature (10 K) magnetization response of inhomogeneous nanoisland FeNi films grown by rf sputtering deposition on Sitall (TiO2) glass substrates. In the grown FeNi films, the FeNi layer nominal thickness varied from 0.6 to 2.5 nm, across the percolation transition at the d(c) similar or equal to 1.8 nm. We discovered that, beyond conventional spin-magnetism of Fe21Ni79 permalloy, the extracted out-of-plane magnetization response of the nanoisland FeNi films is not saturated in the range of investigated magnetic fields and exhibits paramagnetic-like behavior. We found that the anomalous out-of-plane magnetization response exhibits an escalating slope with increase in the nominal film thickness from 0.6 to 1.1 nm, however, it decreases with further increase in the film thickness, and then practically vanishes on approaching the FeNi film percolation threshold. At the same time, the in-plane response demonstrates saturation behavior above 1.5-2T, competing with anomalously large diamagnetic-like response, which becomes pronounced at high magnetic fields. It is possible that the supported-metal interaction leads to the creation of a thin charge-transfer (CT) layer and a Schottky barrier at the FeNi film/Sitall (TiO2) interface. Then, in the system with nanoscale circular domains, the observed anomalous paramagnetic-like magnetization response can be associated with a large orbital moment of the localized electrons. In addition, the inhomogeneous nanoisland FeNi films can possess spontaneous ordering of toroidal moments, which can be either of orbital or spin origin. The system with toroidal inhomogeneity can lead to anomalously strong diamagnetic-like response. The observed magnetization response is determined by the interplay between the paramagnetic-and diamagnetic-like contributions.
This volume presents new results in the study and optimization of information transmission models in telecommunication networks using different approaches, mainly based on theiries of queueing systems and queueing networks .
The paper provides a number of proposed draft operational guidelines for technology measurement and includes a number of tentative technology definitions to be used for statistical purposes, principles for identification and classification of potentially growing technology areas, suggestions on the survey strategies and indicators. These are the key components of an internationally harmonized framework for collecting and interpreting technology data that would need to be further developed through a broader consultation process. A summary of definitions of technology already available in OECD manuals and the stocktaking results are provided in the Annex section.