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Studies of N-Doped p-ZnO Layers Grown on c-Sapphire by Radical Source Molecular Beam Epitaxy
S. V. Ivanov,A. El-Shaer,M. Al-Suleiman,A. Bakin,A. Waag,O. G. Lyublinskaya,N. M. Shmidt,S. B. Listoshin,R. N. Kyutt,V. V. Ratnikov,A. Ya. Terentyev,B. Ya. Ber,T. A. Komissarova,L. I. Ryabova,D. R. Kh 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
We report on the fabrication of p-type ZnO:N layers using radical-source molecular beam epitaxy and post-growth annealing of the samples. Plasma-activated oxygen and nitrogen fluxes are supplied via a single plasma cell. The combination of low growth temperature (350 − 400 ℃), slightly O-rich conditions, and post-growth annealing in the range of 650 − 800 ℃ results in efficient nitrogen pdoping with Hall hole concentration 3 × 1017 cm−3. The details of the structural and the electrical characterizations of the films are discussed. We report on the fabrication of p-type ZnO:N layers using radical-source molecular beam epitaxy and post-growth annealing of the samples. Plasma-activated oxygen and nitrogen fluxes are supplied via a single plasma cell. The combination of low growth temperature (350 − 400 ℃), slightly O-rich conditions, and post-growth annealing in the range of 650 − 800 ℃ results in efficient nitrogen pdoping with Hall hole concentration 3 × 1017 cm−3. The details of the structural and the electrical characterizations of the films are discussed.
RESULTS OF FUNCTIONAL SIMULATION FOR ABS WITH PRE-EXTREME CONTROL
V. IVANOV,M. BELOUS,S LIAKHAU,D MIRANOVICH 한국자동차공학회 2005 International journal of automotive technology Vol.6 No.1
The creation of automotive systems of active safety with intelligent functions needs the use of new control principles for the wheel and automobile. One of such directions is the pre-extreme control strategy. Its aim is the ensuring of wheel's work in pre-extreme, stable area of tire grip wheel slip dependence. The simplest realization of pre-extreme control in automotive anti-lock brake systems consists in the threshold and gradient algorithms. A comparative analysis of these algorithins, which has been made on "hardware in-the-loop" simulation results of the braking for bus with various anti-lock brake systems (ABS), indicated their high efficiency.
RESULTS OF FUNCTIONAL SIMULATION FOR ABS WITH PRE-EXTREME CONTROL
IVANOV V.,BELOUS M.,LIAKHAU S.,MIRANOVICH D. The Korean Society of Automotive Engineers 2005 International journal of automotive technology Vol.6 No.1
The creation of automotive systems of active safety with intelligent functions needs the use of new control principles for the wheel and automobile. One of such directions is the pre-extreme control strategy. Its aim is the ensuring of wheel's work in pre-extreme, stable area of tire grip wheel slip dependence. The simplest realization of pre-extreme control in automotive anti-lock brake systems consists in the threshold and gradient algorithms. A comparative analysis of these algorithms, which has been made on 'hardware in-the-loop' simulation results of the braking for bus with various anti-lock brake systems (ABS), indicated their high efficiency.
Crystal growth of yttrium vanadate by the EFG technique
Kochurikhin, V.V.,Ivanov, M.A.,Suh, S.J.,Yoon, D.H. The Korea Association of Crystal Growth 2001 韓國結晶成長學會誌 Vol.11 No.5
The applicability of shaped growth of yttrium orthovanadate was approved by successful growth of rod-like single crystals with the rectangular shape. Nd-doped single crystals with content of $Nd^{3+}$ ions of 1,2,3,5 atomic % in the starting melt were grown by the EFG technique with the size up to $10^{*}10mm$ in section and up to 85 mm in length. For the testing of the multiple growth of the orthovanadates, two and three Nd-and Yb-doped $YVO_{4}$ single crystals were grown by the EFG technique simultaneously up to 110 mm in length.
CdSe Quantum Dots Embedded in a ZnCdSe Quantum Well: Towards Efficient Yellow Photoluminescence
I. V. Sedova,O. G. Lyublinskaya,S. V. Sorokin,S. V. Gronin,A. A. Sitnikova,S. V. Ivanov 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
This paper reports on studies of self-assembled CdSe quantum dot (QD) nanostructures grown by using molecular beam epitaxy in a ZnCdSe quantum well (QW) embedded in ZnSe barriers, which emit in the yellow spectral range (λ = 560 - 570 nm). An up to 180-meV long-wavelength shift of the photoluminescence peak energy, as compared to QDs of the same nominal thickness grown in a ZnSe matrix, was demonstrated. The reasons for that are a decrease in the barrier band gap and an increase in the exciton localization energy in CdSe QDs grown in a ZnCdSe QW. Transmission electron microscopy studies demonstrate an increase in the QD density along with the decreasing their lateral size and a narrowing of the size distribution.
New Magnetic Anomaly Map of the Antarctic
Golynsky, A. V.,Ferraccioli, F.,Hong, J. K.,Golynsky, D. A.,von Frese, R. R. B.,Young, D. A.,Blankenship, D. D.,Holt, J. W.,Ivanov, S. V.,Kiselev, A. V.,Masolov, V. N.,Eagles, G.,Gohl, K.,Jokat, W.,Da American Geophysical Union 2018 Geophysical research letters Vol.45 No.13
Robin, Y.,Evropeitsev, E. A.,Shubina, T. V.,Kirilenko, D. A.,Davydov, V. Yu.,Smirnov, A. N.,Toropov, A. A.,Eliseyev, I. A.,Bae, S. Y.,Kushimoto, M.,Nitta, S.,Ivanov, S. V.,Amano, H. The Royal Society of Chemistry 2019 Nanoscale Vol.11 No.1
<P>Transient photoluminescence (PL) characteristics and localization phenomena in InGaN/GaN core-shell nanorods (NRs) were investigated from 6 K up to 285 K. The NRs exhibit three well-defined PL bands in the near-UV, blue, and green range ascribed to the emission of quantum well (QW) areas situated at the (1.00) sidewalls, (10.1) top facets, and (00.1) tip, respectively. At low temperature, time-resolved PL shows a fast decay time of about 0.5 ns for the semi- and non-polar QWs, while the polar QWs exhibit at least a twice-longer time. Rapid delocalization of carriers above 50 K indicates shallow potential fluctuations in the QWs. At room temperature, the characteristic fast PL decay time of the three QW bands stabilizes around 300 ps. The slow decaying PL components have different characteristic decay times that are explained by additional localization at basal stacking faults (BSFs), taking into account the quantum confined Stark effect. In addition, narrow excitonic luminescence lines are observed in the BSF-enriched polar QWs, providing direct evidence of the impact of the BSF/QW crossings on the optical properties of the NRs. A PL rise time of about 100 ps does not show any deviation between bands. These findings are suggestive of similar transport mechanisms in temperature equilibrium without inter-facet transport between different QWs. We believe that predictable transient characteristics can play a key role in creating uniform NR ensembles for device applications.</P>
Yuriy V. Erokhin,Kirill S. Ivanov 한국지질과학협의회 2019 Geosciences Journal Vol.23 No.2
This paper describes the discovery of the first solid bitumen in the plagiorhyolites of Sinara River (Kataysky District, Kurgan Oblast), which are part of the Early Triassic Turin volcanic-sedimentary series on the border of the Ural and Western Siberia. According to data provided by complex analytical studies, they were classified as low anthraxolites. It was found that the formation of solid bitumen in acidic volcanic rocks of Sinara River occurred during the late stage of establishment of the plagiorhyolite body during the formation of chalcedonic (agate) amygdales and secretions. Solidification and sedimentation of anthraxolite from hydrothermal solutions apparently took place under a radical prevalence of the carbonate ion, i.e., in the amygdales during the crystallization of calcite, while in the edge zones of brecciation of plagiorhyolite – of another carbonate, siderite. The source of the substance for the formation of anthraxolite in plagiorhyolites of Sinara River could be both the enclosing sedimentary rocks and deep (mantle) carbohydrate fluids.
Evidence for a narrow structure at W∼1.68 GeV in η photoproduction off the neutron
Kuznetsov, V.,Churikova, S.,Gervino, G.,Ghio, F.,Girolami, B.,Ivanov, D.,Jang, J.,Kim, A.,Kim, W.,Ni, A.,Vorobiev, Yu.,Yurov, M.,Zabrodin, A. North-Holland Pub. Co 2007 Physics letters: B Vol.647 No.1
New results on quasi-free η photoproduction on the neutron and proton bound in a deuteron target are presented. The γn->ηn quasi-free cross section reveals a bump-like structure which is not seen in the cross section on the proton. This structure may signal the existence of a relatively narrow (M∼1.68 GeV, Γ=<30 MeV) baryon state.
Sergey V. Brodsky,Nilesh S. Mhaskar,Sampath Thiruveedi,Rajnish Dhingra,Sharon C. Reuben,Edward Calomeni,Iouri Ivanov,Anjali Satoskar,Jessica Hemminger,Gyongyi Nadasdy,Lee Hebert,Brad Rovin,Tibor Nadas 대한신장학회 2017 Kidney Research and Clinical Practice Vol.36 No.4
Anticoagulant-related nephropathy (ARN) was initially described in patients on warfarin (as warfarin-related nephropathy) and recently in those using dabigatran. Herein, we report clinical history and kidney biopsy findings in a patient on apixaban (Eliquis). Initiation of treatment with apixaban resulted in aggravation of preexisting mild acute kidney injury (AKI). A few days after apixaban therapy, the patient became oligoanuric, and kidney biopsy showed severe acute tubular necrosis with numerous occlusive red blood cell casts. Only one out of 68 glomeruli with open capillary loops had small segmental cellular crescent. Therefore, there was major discrepancy between the degree of glomerular injury and the glomerular hematuria. Considering that the onset of this AKI was associated with apixaban treatment initiation, we propose that this patient had ARN associated with factor Xa inhibitor (apixaban), which has not previously been described. Monitoring of kidney function is recommended after initiation of anticoagulant therapy.