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News
July 15, 2026
Economists Propose More Effective Approach to Reducing Smoking
Economists at HSE University have examined how smokers respond to changes in cigarette prices. When tobacco prices increase, cigarette consumption does not always decline. In fact, spending on tobacco may even rise: according to the researchers, a 1% decrease in cigarette affordability leads to a 0.28% increase in per capita tobacco expenditure. The findings suggest that to reduce smoking rates, tobacco prices must rise faster than household incomes. The study has been published in Voprosy Statistiki.
July 15, 2026
HSE MIEM Students to Develop Two Satellites from Scratch for Orbital Experiments
The devices, created by student teams, will conduct space research on the properties of promising solar cells, on-board energy storage systems, and serial electronics for student satellites.
July 13, 2026
Biologists Discover Unique Properties of MiR-93-5p MicroRNA in Prostate Cancer
Researchers at the International Laboratory of Microphysiological Systems of the HSE Faculty of Biology and Biotechnology investigated how different isoforms of the same microRNA influence gene function in prostate adenocarcinoma. The study found that in some cases, microRNAs can reinforce each other’s effects by targeting and suppressing the same genes. This finding offers a fresh perspective on the molecular mechanisms underlying tumour development and on the search for disease biomarkers. The results have been published in PeerJ.

 

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?

Численное решение уравнений модели Роуза-Фаулера-Вайсберга

С. 267–274.
Ikhsanov R., Демиденко А. А., Доронин А., Nereto M.
Language: Russian
Keywords: подвижность носителей зарядарадиационная электропроводностьмодель многократного захвата

In book

Труды XVII Международного совещания "Радиационная физика твердого тела" (Севастополь , 9-14 июля 2007 г.)
М.: ФГБНУ "НИИ ПМТ", 2007.
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The study involves the computational modeling of electrostatic discharge initiation in polymer materials utilized in space environment under low-temperature conditions. To address this challenge, experimental data on the radiation-induced electrical conductivity of polyimide and polyethylene terephthalate at reduced temperatures, have been employed. The simulation encompasses the evaluation of electric field intensity within polyimide and polyethylene ...
Added: June 6, 2024
Charge Density and Mobility of Charge Density Waves in the Quasi-One-Dimensional Conductor NbS3
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Three charge density waves (CDWs), two of which are formed above room temperature, are observed in the NbS3 monoclinic phase (NbS3-II). The charge density and mobility in the high-field limit have been determined for each of three CDWs in this work using the synchronization effect of CDWs in high-frequency fields. It has been found that the ...
Added: January 30, 2024
Низкотемпературная радиационная электропроводность полистирола под действием электронов низких энергий
И. Р. Муллахметов, В. С. Саенко, А. П. Тютнев et al., Журнал технической физики, Российская Федерация 2023 Т. 93 № 1 С. 130–134
Разработана методика и впервые получены достаточно полные данные по радиационной электропроводности полистирола при температуре 79K при импульсном и непрерывном воздействии электронов с энергией 50 keV. Показано, что радиационная электропроводность полистирола при температуре 79K, как и при комнатной температуре определяется суммой двух компонент: мгновенной и задержанной. Обе компоненты при 79K имеют значительно меньшие величины, чем при 298K. Полный сигнал ...
Added: January 2, 2023
Radiation-induced conductivity in polyethyleneterephthalate and polyimide: Trap distribution effects
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Abstract We have analyzed the radiation-induced conductivity in polyethyleneterephthalate (PET) and polyimide in terms of the recently developed semi-empirical model whose parameters have been determined numerically by a trial and error method based on our previously published results which have been shown to be correct with respect to such experimental limitations as recombination and current saturation. ...
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Electron Transport in Polyethyleneterephthalate
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Abstract—The electron transport is studied experimentally by measuring pulsed radiation-induced conductivity in polyetheleneterephthalate under bulk irradiation of polymer films by fast electron pulses in a smallsignal regime. Numerical simulation is performed using a multiple trapping model with an exponential energy trap distribution. It is shown that, contrary to the reported interpretation of this phenomenon, there is no electron extraction ...
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Theoretical Analysis of the Radiation-Induced Conductivity in Polymers Exposed to Pulsed and Continuous Electron Beams
Tyutnev A. P., Saenko V. S., Aleksey D. Zhadov et al., Polymers 2020 Vol. 12 No. 628 P. 1–10
Abstract: We have performed comparative numerical calculations using a multiple trapping (MT) formalism with an exponential and an aggregate two-exponential trap distributions for describing two mostly used experimental setups for studying the radiation-induced conductivity (RIC) and the time-of-flight (TOF) effects. Computations have been done for pulsed and long-time electron-beam irradiations in a small-signal regime. Predictions of these two approaches ...
Added: April 16, 2020
Radiation-Induced Transient Currents in Films of Poly(arylene ether ketone) Including Phthalide Moiety//Polymers, doi: 10.3390/polym12010013
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Abstract: Electrical properties of the thin films of poly(arylene ether ketone) copolymers (co-PAEKs) with the fraction of phthalide-containing units of 3, 5 and 50 mol% in the main chain were investigated by using radiation induced conductivity (RIC) measurements. Transient current signals and current-voltage (I-V) characteristics were obtained under exposing 20÷25 thick films of the co-PAEKs to monoenergetic electron pulses ...
Added: November 20, 2019
Numerical analysis of the photo-injection time-of-flight curves in molecularly doped polymers
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We have performed numerical analysis of the charge carrier transport in a specific molecularly doped polymer using the multiple trapping model. The computations covered a wide range of applied electric fields, temperatures and most importantly, of the initial energies of photo injected one-sign carriers (in our case, holes). Special attention has been given to comparison of time of ...
Added: February 12, 2018
The Photovoltaic Effect and Charge Carrier Mobility in Layered Compositions of Bithiophene or Related Rotaxane Copolymer with C70 Fullerene Derivative
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Organic photovoltaic cells with a bulk heterojunction have been manufactured in which the photoactive layer consists of a mixture of bithiophene copolymer or related rotaxane with a fullerene derivative (PC70BM). The mobility of charge carriers in photoactive layers has been determined, the current–voltage characteristics of photovoltaic cells have been measured, and the energy level diagram ...
Added: October 7, 2017
Synthesis and properties of new π-conjugated imidazole/carbazole structures
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New 3-(1H-imidazol-2-yl)-9H-carbazoles and 6,60-di(1H-imidazol-2-yl)-9H,90H-3,30-bicarbazoles have been prepared, starting from 9-ethyl-9H-carbazole-3-carbaldehyde or 9,90-diethyl-9H,90H-[3,30-bicarbazole]-6,60-dicarbaldehyde through their reactions with 4-methoxyaniline or 4-fluoroaniline, benzil or 2,20-thenil [1,2-di(thien-2,20-yl) glyoxal] and ammonium acetate on reflux in glacial acetic acid. The obtained compounds have been shown to demonstrate an effective fluorescence in the blue spectral region, exhibiting quantum yields in the range ...
Added: October 7, 2017
Определение параметров SPICE-моделей МОПТ при низких температурах (до минус 200°C)
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Added: September 13, 2017
Poole-Frenkel mobility field dependence in molecularly doped polymers revisited
A.P. Tyutnev, V.S. Saenko, Chemical Physics 2017 Vol. 483–484 P. 172–176
We have examined the Poole-Frenkel mobility field dependence in a molecularly doped polymer (MDP) both experimentally and theoretically trying to separate two physically different contributions to this phenomenon, one constituting a real physical effect and the other arising from the fact that the charge carrier transport in MDP is not fully equilibrated. The former is ...
Added: January 27, 2017
Universality of Charge-Carrier Transport in Molecularly Doped Polymers
A.P. Tyutnev, A.V. Nikerov, D.D. Smirnov et al., Polymer Science - Series A 2016 Vol. 58 No. 2 P. 276–282
Abstract—The charge-carrier transport model based on the multiple-trapping quasi-band theory with the Gaussian or exponential energy distributions of traps for the two-layer structure of the molecularly doped polymer sample is used to explain the experimentally observed constancy of the flat plateau on time-of-flight curves in a wide electric-field range. The constant shape of the time-of-flight ...
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Non-dispersive carrier transport in molecularly doped polymers and the convection–diffusion equation
A.P. Tyutnev, Parris P. E., V.S. Saenko, Chemical Physics 2015 Vol. 457 P. 122–128
We reinvestigate the applicability of the concept of trap-free carrier transport in molecularly doped polymers and the possibility of realistically describing time-of-flight (TOF) current transients in these materials using the classical convection–diffusion equation (CDE). The problem is treated as rigorously as possible using boundary conditions appropriate to conventional time of flight experiments. Two types of ...
Added: June 20, 2015
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Abstract — The transient current curves for a polar molecularly doped polymer were compared for the near? surface and bulk generation of charge carriers. The horizontal plateau on the first curve was expected to trans? form into a tilted straight line under the quasiequilibrium transport conditions, but it did not. Instead, for bulk generation, the ...
Added: September 3, 2014
Особенности полевой зависимости подвижности носителей заряда в молекулярно допированных полимерах в режиме неравновесного транспорта
А.П. Тютнев, А.В. Никеров, А.Е. Абрамешин et al., Высокомолекулярные соединения. Серия А 2014 Т. 56 № 5 С. 719–724
Abstract — A multiple-trapping model has been used to numerically analyze the effects of the nonequilibrium transport of holes on the field dependence of drift mobility as obtained in a time-of-flight experiment. The intrinsic field dependence has been assigned to the frequency factor in the form of the Poole–Frenkel law. Strongly dispersive transport, as well ...
Added: September 3, 2014
Comparison of the time of flight current shapes predicted by hopping and multiple trapping models
Tyutnev A. P., Ikhsanov R., Novikov S. V., Chemical Physics 2014 Vol. 440 P. 1–7
We have compared time-of-flight curves predicted by hopping and multiple trapping models with the Gaussian and exponential site/trap energy distributions, fitting Monte-Carlo predictions of the former with numerical calculations of the latter in a wide time domain using logarithmic coordinates lg j–lgt for the characterization of current shapes and an estimation of transit times. As ...
Added: August 13, 2014
Физика конденсированного состояния. Методические указания к курсовой работе
Strogankova N. I., М.: РИО МИЭМ НИУ ВШЭ, 2012.
Описана методика расчета равновесных электрофизических параметров твердых тел и приведены справочные данные, необходимые для выполнения курсовых работ по дисциплине "Физика конденсированного состояния". ...
Added: February 17, 2014
Радиационная электропроводность полиэтилена с учетом образования и накопления свободных радикалов
Nereto M., Баранова И. А., Ikhsanov R., В кн.: Труды XIX Международного совещания "Радиационная физика твердого тела" (Севастополь, 31 августа - 5 сентября 2009 г.).: М.: Издательство ГНУ НИИ ПМТ, 2009. С. 603–612.
В настоящей работе предпринята попытка идентификации ловушек носителей заряда в полиэтилене низкой плотности, как свободных радикалов, которые создаются в процессе воздействия ионизирующей радиации. ...
Added: February 16, 2014
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