Orientation of liquid crystalline materials by using carbon nanotubes

The solution of some problems, where the initial black field is necessary for the regime of light transmission through the electrooptical organic nematic liquid crystal structures has been considered via a homeotropic alignment of liquid crystal molecules on the substrate covered by carbon nanotubes. The results of this investigation can be used to develop optical elements for displays with vertical orientations of nematic liquid crystal molecules (for example, for MVA-display technology)

Intrusion detection system on the basis of data mining algorithms in the industrial network of automated process control system

The purpose of the work is to increase the security of the industrial network of an automated process control system based on intelligent network traffic analysis algorithms. The analysis of the problem of detecting and recording actions of violators on the implementation of a network attack on an automated process control system in the industrial network of an enterprise has been performed. A structural and functional model of the monitoring system of the industrial network of industrial control systems is proposed. An algorithm is developed for the intellectual analysis of network traffic of industrial protocols and a software package that implements the proposed algorithms as part of a monitoring system to evaluate the effectiveness of the proposed solution on field data.This work was supported by the Russian Foundation for Basic Research, research No17-48-020095

Technological process monitoring system on the basis of artificial intelligence technology

The relevance of the work is due to the widespread use of network telecommunications in the automated process control system and the high level of danger of replacing, distorting or losing accumulated data on the process progress as a result of the attacker's influence. Objective: increasing the security of measurement results from unauthorized modification in the databases of information systems of an industrial enterprise by improving process monitoring system based on the intellectual analysis of technological time series. A structural scheme of process monitoring as part of an information protection system in a segment of an automated process control system network has been developed. The algorithm of intellectual analysis of technological time series in the task of detecting violation of the integrity of data on the process progress due to their unauthorized modification was proposed. Evaluated the effectiveness of the proposed solution on field data.This work was supported by the Russian Foundation for Basic Research, research No 17-48-020095

Decision support system for ensuring information security of an automated process control system

The problem of ensuring the information security of an automated process control system (APCS) is considered. An overview of the main regulatory documents on ensuring the safety of automated process control systems is given. For the operative solution of the tasks of ensuring information security of the automated control system of technological processes it is proposed to use an intelligent decision support system (DSS). An example of the construction and implementation of decision rules in the composition of the DSS based on the use of neuro- fuzzy models is considered.This work is partially supported by the Russian Science Foundation under grants No17-48-020095

Bank transaction text label mining algorithms

The banking transaction monitoring system implements decision support mechanisms for online payment control procedures for legal entities considering the dynamic risk profile of the client. The system includes a set of algorithms for the intellectual analysis of transaction parameters, including a text label for the purpose of payment, and decision support for an employee of the financial monitoring unit. The development of algorithms for analyzing textual labels for the purpose of payments allows us to clarify the dynamic payment profile of the user and increase the validity of the recommendations of the monitoring system. A block diagram of a system for identifying high-risk banking transactions based on data mining algorithms has been developed. Algorithms for data mining of textual labels of the payment purpose have been developed and the effectiveness of the proposed solution on field data has been evaluated. An algorithm is proposed for the phased analysis of the text label of the payment destination, including the stages of preprocessing, filtering, normalizing and constructing a classifier based on a set of regular expressions and intelligent analysis technologies. The difference between the algorithm is the use of adaptive category dictionaries and the multi-pass application of heterogeneous classifiers, which makes it possible to increase the validity of the decision on whether the transaction belongs to one of the selected classes

Intelligent emotion recognition system in neural network basis

The human factor plays a significant role in ensuring the integrated safety of technological facilities. It is important to monitor the state of the operator of automated process control systems in soft real-time mode in order to reduce the risk of attention and concentration losses. Paper discusses the issues of increasing the efficiency of monitoring system of the operator’s state by using algorithms for assessing the psycho-emotional state. These algorithms apply methods of intelligent analysis of video sequence data without the use of additional contact sensors, which reduces probability of making a wrong decision due to the timely detection of unstable psycho-emotional states. The accuracy of detecting unstable psycho- emotional states on a test data set is 79%

Effective thickness of the planar detector in measurements of electrons energy loss

An experimental method of determining the active region thickness of Si planar detector was used. The method based on the dependence the depletion layer thickness from voltage applied to the detector (U = 0...60 V ). The electron energy loss spectra emitted by ⁹⁰Sr -⁹⁰Y in silicon planar detector were measured. The relative values of most probable energy loss of electrons were de ned for different thickness of detector. The planar detector was considered as a parallel-plate capacitor. The static (capacity) and dynamic (the detection efficiency and the energy deposit) characteristics had a root dependence on voltage.Використовувався експериментальний метод визначення товщини активної області Si-планарного детектора. Метод заснований на залежності товщини збідненого шару від напруги, прикладеної до детектора (0...60 В). Вимірювалися спектри втрат енергії електронів, що випускаються ⁹⁰Sr -⁹⁰Y в кремнієвому планарному детекторі. Були визначені відносні значення найбільш ймовірних втрат енергії електронів для різної товщини детектора. Плоский детектор розглядався як конденсатор з паралельними пластинами. Статична (ємність) і динамічна (ефективність реєстрації та енергетичні втрати) характеристики мають кореневу залежністю від напруги.Использовался экспериментальный метод определения толщины активной области Si-планарного детектора. Метод основан на зависимости толщины обедненного слоя от напряжения, приложенного к детектору (0...60 В). Измерялись спектры потерь энергии электронов, испускаемые ⁹⁰Sr -⁹⁰Y в кремниевом планарном детекторе. Были определены относительные значения наиболее вероятных потерь энергии электронов для различной толщины детектора. Плоский детектор рассматривался как конденсатор с параллельными пластинами. Статическая (емкость) и динамическая (эффективность регистрации и энергетические потери) характеристики имеют корневую зависимостью от напряжения

Bremsstrahlung of electrons and yield of neutrons from thick converters, passing of gamma-radiation and neutrons through biological shielding

In GEANT4 spectral-angular distributions of the bremsstrahlung of medium-energy electrons from amorphous targets of different thickness and atomic charge were calculated. The total yield of gamma quanta in the forward hemisphere and at large scattering angles were determined depending on the converter thickness. The difference in the characteristics of gamma radiation for thin and thick targets was shown. The neutron yield is calculated due to photonuclear reactions for various converters. Numerical estimates of the radiation spectra after passing through the biological shielding for neutron and bremsstrahlung were carried out.У GEANT4 розраховано спектрально-кутові розподіли гальмівного гамма випромінювання електронів середніх енергій з аморфних мішеней-конверторів різної товщини і атомного заряду. Визначено повний вихід гамма-квантів у передню півсферу і під великими кутами розсіювання в залежності від товщини конвертора. Показано відмінність характеристик гамма-випромінювання для тонких і товстих мішеней. Проведено розрахунок виходу нейтронів за рахунок фотоядерних реакцій для різних конверторів. Проведено чисельні оцінки спектрів випромінювання після проходження біологічного захисту окремо для нейтронного і гальмівного випромінювань.В GEANT4 рассчитаны спектрально-угловые распределения тормозного гамма-излучения электронов средних энергий из аморфных мишеней-конверторов различной толщины и атомного заряда. Определен полный выход гамма-квантов в переднюю полусферу и под большими углами рассеяния в зависимости от толщины конвертора. Показано различие характеристик гамма- излучения для тонких и толстых мишеней. Проведен расчет выхода нейтронов за счет фотоядерных реакций для различных конверторов. Проведены численные оценки спектров излучения после прохождения биологической защиты отдельно для нейтронного и тормозного излучений

Technical design and performance of the NEMO3 detector

The development of the NEMO3 detector, which is now running in the Frejus Underground Laboratory (L.S.M. Laboratoire Souterrain de Modane), was begun more than ten years ago. The NEMO3 detector uses a tracking-calorimeter technique in order to investigate double beta decay processes for several isotopes. The technical description of the detector is followed by the presentation of its performance.Comment: Preprint submitted to Nucl. Instrum. Methods A Corresponding author: Corinne Augier ([email protected]

Results of the BiPo-1 prototype for radiopurity measurements for the SuperNEMO double beta decay source foils

The development of BiPo detectors is dedicated to the measurement of extremely high radiopurity in $^{208}$Tl and $^{214}$Bi for the SuperNEMO double beta decay source foils. A modular prototype, called BiPo-1, with 0.8 $m^2$ of sensitive surface area, has been running in the Modane Underground Laboratory since February, 2008. The goal of BiPo-1 is to measure the different components of the background and in particular the surface radiopurity of the plastic scintillators that make up the detector. The first phase of data collection has been dedicated to the measurement of the radiopurity in $^{208}$Tl. After more than one year of background measurement, a surface activity of the scintillators of $\mathcal{A}$($^{208}$Tl) $=$ 1.5 $\mu$Bq/m$^2$ is reported here. Given this level of background, a larger BiPo detector having 12 m$^2$ of active surface area, is able to qualify the radiopurity of the SuperNEMO selenium double beta decay foils with the required sensitivity of $\mathcal{A}$($^{208}$Tl) $<$ 2 $\mu$Bq/kg (90% C.L.) with a six month measurement.Comment: 24 pages, submitted to N.I.M.