5,940 results on '"Nesterov, A."'
Search Results
2. Asymptotics of the solution of the turbulent diffusion equation taking into account the polydispersity of the impurity and wind pickup from the underlying surface
- Author
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Nesterov, A. V.
- Subjects
Mathematics - Analysis of PDEs ,35C20 (Primary) 35F35 (Secondary) - Abstract
The asymptotics of a singularly perturbed problem is constructed. describing the transport of a polydisperse impurity in the atmosphere, taking into account the processes of precipitation and wind pick-up, as well as the processes of coagulation - dissociation. The mathematical model of this process represents a differential-operator equation of turbulent diffusion with a non-standard boundary condition containing two components - atmospheric and soil. The asymptotics of the solution is constructed by the method of boundary functions. Problems that do not contain small parameters are obtained for the main terms of the asymptotic equation., Comment: 12 pages, 1 figur
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- 2024
3. Henneaux-Teitelboim Form of the Generalized Unimodular Gravity Action
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Nesterov, Dmitry and Lyamkina, Ksenia
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High Energy Physics - Theory ,General Relativity and Quantum Cosmology - Abstract
We present an alternative formulation of generalized unimodular gravity (GUMG), extending the Henneaux-Teitelboim approach to unimodular gravity (UMG). The central feature of this formulation is the consistent incorporation of time reparameterization, which enhances the gauge structure and reveals a spatial nonlocality hidden in the dynamics of the original formulation. We examine the resulting dynamics, emphasizing the effects of spatial nonlocality, and outline the constraint structure. In particular, we show that the gauge symmetry in the gravitational sector is extended by a functionally incomplete symmetry, as occurs in the unimodular gravity. Furthermore, we identify a subset of GUMG models for which the alternative formulation preserves manifest locality., Comment: 5 pages
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- 2024
4. Local and Global Convergence of Greedy Parabolic Target-Following Methods for Linear Programming
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Nesterov, Yurii
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Mathematics - Optimization and Control ,90C25 - Abstract
In the first part of this paper, we prove that, under some natural non-degeneracy assumptions, the Greedy Parabolic Target-Following Method, based on {\em universal tangent direction} has a favorable local behavior. In view of its global complexity bound of the order $O(\sqrt{n} \ln {1 \over \epsilon})$, this fact proves that the functional proximity measure, used for controlling the closeness to Greedy Central Path, is large enough for ensuring a local super-linear rate of convergence, provided that the proximity to the path is gradually reduced. This requirement is eliminated in our second algorithm based on a new auto-correcting predictor direction. This method, besides the best-known polynomial-time complexity bound, ensures an automatic switching onto the local quadratic convergence in a small neighborhood of solution. Our third algorithm approximates the path by quadratic curves. On the top of the best-known global complexity bound, this method benefits from an unusual local cubic rate of convergence. This amelioration needs no serious increase in the cost of one iteration. We compare the advantages of these local accelerations with possibilities of finite termination. The conditions allowing the optimal basis detection sometimes are even weaker than those required for the local superlinear convergence. Hence, it is important to endow the practical optimization schemes with both abilities. The proposed methods have a very interesting combination of favorable properties, which can be hardly found in the most of existing Interior-Point schemes. As all other parabolic target-following schemes, the new methods can start from an arbitrary strictly feasible primal-dual pair and go directly towards the optimal solution of the problem in a single phase. The preliminary computational experiments confirm the advantage of the second-order prediction.
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- 2024
5. Direct determination of the $^{235}$U to $^{239}$Pu inverse beta decay yield ratio in the power reactor neutrino experiments
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Alekseev, I., Belov, V., Bystryakov, A., Danilov, M., Filosofov, D., Fomina, M., Gorovtsov, P., Iusko, Ye., Kazartsev, S., Khvatov, V., Kiselev, S., Kobyakin, A., Krapiva, A., Kuznetsov, A., Machikhiliyan, I., Mashin, N., Medvedev, D., Nesterov, V., Ponomarev, D., Rozova, I., Rumyantseva, N., Rusinov, V., Samigullin, E., Shevchik, Ye., Shirchenko, M., Shitov, Yu., Skrobova, N., Svirida, D., Tarkovsky, E., Yakushev, E., Zhitnikov, I., Yakovleva, A., and Zinatulina, D.
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Nuclear Experiment ,High Energy Physics - Experiment - Abstract
The yields of the inverse beta decay events produced by antineutrinos from a certain nuclear reactor fuel component are used by many experiments to check various model predictions. Yet measurements of the absolute yields feature significant uncertainties coming, mainly, from the understanding of the antineutrino detection efficiency. This work presents a simple novel approach to directly determine the $^{235}$U to $^{239}$Pu inverse beta decay yield ratio using the fuel evolution analysis. This ratio can be used for a sensitive test of reactor models, while the proposed method, results in smaller systematic uncertainties., Comment: 5 pages, 2 figures
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- 2024
6. Long term remote reactor power and fuel composition monitoring using antineutrinos
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Alekseev, I., Belov, V., Bystryakov, A., Danilov, M., Filosofov, D., Fomina, M., Gorovtsov, P., Iusko, Ye., Kazartsev, S., Khvatov, V., Kiselev, S., Kobyakin, A., Krapiva, A., Kuznetsov, A., Machikhiliyan, I., Mashin, N., Medvedev, D., Nesterov, V., Ponomarev, D., Rozova, I., Rumyantseva, N., Rusinov, V., Salamatin, A., Samigullin, E., Shevchik, Ye., Shirchenko, M., Shitov, Yu., Skrobova, N., Svirida, D., Tarkovsky, E., Yakushev, E., Zhitnikov, I., Yakovleva, A., and Zinatulina, D.
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High Energy Physics - Experiment ,Nuclear Experiment ,Physics - Instrumentation and Detectors - Abstract
Electron antineutrinos are emitted in the decay chains of the fission products inside a reactor core and could be used for remote monitoring of nuclear reactors. The DANSS detector is placed under the core of the 3.1 GW power reactor at the Kalinin Nuclear Power Plant (KNPP) and collects up to 5000 antineutrino events per day. DANSS measured changes of the reactor power by antineutrino counting rates over 7 years with 1.0% accuracy in one week periods. The systematic uncertainty of this measurement is less than 0.8%. It is comparable to the accuracy of conventional methods of the reactor power measurements while it is based on completely different approach. For the first time the 239Pu and 235U fission fractions were reconstructed using antineutrino inverse beta-decay spectrum which is a completely new technique. This method was applied to the data from three reactor fuel campaigns (approximately 1.5 year each). The reconstructed fission fractions in about one week measurements and the fission fractions provided by KNPP coincide within about 3% accuracy. This provides confidence in both completely different approaches of the fission fraction determination.
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- 2024
7. Improved global performance guarantees of second-order methods in convex minimization
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Dvurechensky, Pavel and Nesterov, Yurii
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Mathematics - Optimization and Control ,90C25, 90C30, 68Q25 ,G.1.6 - Abstract
In this paper, we attempt to compare two distinct branches of research on second-order optimization methods. The first one studies self-concordant functions and barriers, the main assumption being that the third derivative of the objective is bounded by the second derivative. The second branch studies cubic regularized Newton methods (CRNMs) with the main assumption that the second derivative is Lipschitz continuous. We develop a new theoretical analysis for a path-following scheme (PFS) for general self-concordant functions, as opposed to the classical path-following scheme developed for self-concordant barriers. We show that the complexity bound for this scheme is better than that of the Damped Newton Method (DNM) and show that our method has global superlinear convergence. We propose also a new predictor-corrector path-following scheme (PCPFS) that leads to further improvement of constant factors in the complexity guarantees for minimizing general self-concordant functions. We also apply path-following schemes to different classes of constrained optimization problems and obtain the resulting complexity bounds. Finally, we analyze an important subclass of general self-concordant functions, namely a class of strongly convex functions with Lipschitz continuous second derivative, and show that for this subclass CRNMs give even better complexity bounds.
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- 2024
8. Convergence of Descent Methods under Kurdyka-\L ojasiewicz Properties
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Bento, G. C., Mordukhovich, B. S., Mota, T. S., and Nesterov, Yu.
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Mathematics - Optimization and Control ,65K05, 65K10, 90C26, 47N10 - Abstract
This paper develops the novel convergence analysis of a generic class of descent methods in nonsmooth and nonconvex optimization under several versions of the Kurdyka-\L ojasiewicz (KL) property. Along other results, we prove the finite termination of generic algorithms under the KL property with lower exponents. Specifications are given to convergence rates of some particular algorithms including inexact reduced gradient methods and the boosted algorithm in DC programming. It revealed, e.g., that the lower exponent KL property in the DC framework is incompatible with the gradient Lipschitz continuity for the plus function around a local minimizer. On the other hand, we show that the above inconsistency observation may fail if the Lipschitz continuity is replaced by merely the gradient continuity., Comment: 12 pages
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- 2024
9. Unramified Gromov-Witten and Gopakumar-Vafa invariants
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Nesterov, Denis
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Mathematics - Algebraic Geometry ,Mathematical Physics ,Mathematics - Symplectic Geometry - Abstract
Kim, Kresch and Oh defined unramified Gromov-Witten invariants. For a threefold, Pandharipande conjectured that they are equal to Gopakumar-Vafa invariants (BPS invariants) in the case of Fano classes and primitive Calabi-Yau classes. We prove the conjecture using a wall-crossing technique. This provides an algebro-geometric construction of Gopakumar-Vafa invariants in these cases., Comment: Some minor changes, more details are added, 67 pages, 3 figures
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- 2024
10. Fine Tuning of the Rotational Rate of Light-Driven, Second Generation Molecular Motors by Fluorine Substitutions
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Tambovtsev, Ivan, Schmerwitz, Yorick L. A., Levi, Gianluca, Darmoroz, Darina D., Nesterov, Pavel V., Orlova, Tetiana, and Jónsson, Hannes
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Physics - Chemical Physics - Abstract
The relaxation time of several second generation molecular motors is analysed by calculating the minimum energy path between the metastable and stable states and evaluating the transition rate within harmonic transition state theory based on energetics obtained from density functional theory. Comparison with published experimental data shows remarkably good agreement and demonstrates the predictive capability of the theoretical approach. While previous measurements by Feringa and coworkers [Chem.\,Eur.\,J.\,(2017) 23, 6643] have shown that a replacement of the stereogenic hydrogen by a fluorine atom increases the relaxation time because of destabilization of the transition state for the thermal helix inversion, we find that a replacement of CH$_3$ by a CF$_3$ group at the same site shortens the relaxation time because of elevated energy of the metastable state without a significant shift in the transition state energy. Since these two fluorine substitutions have an opposite effect on the relaxation time, the two combined can provide a way to fine tune the rotational speed of a molecular motor.
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- 2024
11. Substantiation of the Possibility to Obtain 177Lu on the Average Flux Research Reactor IRT-T
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Ushakov, I. A., Zukau, V. V., Nesterov, E. A., Smol’nikov, N. V., Shelikhova, E. A., and Donyaeva, E. S.
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- 2024
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12. An optimal lower bound for smooth convex functions
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Florea, Mihai I. and Nesterov, Yurii
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Mathematics - Optimization and Control ,52A41, 90C25, 68Q25, 65Y20, 65B99 - Abstract
First order methods endowed with global convergence guarantees operate using global lower bounds on the objective. The tightening of the bounds has been shown to increase both the theoretical guarantees and the practical performance. In this work, we define a global lower bound for smooth differentiable objectives that is optimal with respect to the collected oracle information. The bound can be readily employed by the Gradient Method with Memory to improve its performance. Further using the machinery underlying the optimal bounds, we introduce a modified version of the estimate sequence that we use to construct an Optimized Gradient Method with Memory possessing the best known convergence guarantees for its class of algorithms, even in terms of the proportionality constant. We additionally equip the method with an adaptive convergence guarantee adjustment procedure that is an effective replacement for line-search. Simulation results on synthetic but otherwise difficult smooth problems validate the theoretical properties of the bound and proposed methods., Comment: 29 pages, 1 figure
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- 2024
13. Technical Design Report of the Spin Physics Detector at NICA
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The SPD Collaboration, Abazov, V., Abramov, V., Afanasyev, L., Akhunzyanov, R., Akindinov, A., Alekseev, I., Aleshko, A., Alexakhin, V., Alexeev, G., Alimov, L., Allakhverdieva, A., Amoroso, A., Andreev, V., Andronov, E., Anikin, Yu., Anischenko, S., Anisenkov, A., Anosov, V., Antokhin, E., Antonov, A., Antsupov, S., Anufriev, A., Asadova, K., Ashraf, S., Astakhov, V., Aynikeev, A., Azarkin, M., Azorskiy, N., Bagulya, A., Baigarashev, D., Baldin, A., Baldina, E., Barbashina, N., Barnyakov, A., Barsov, S., Bartkevich, A., Baryshevsky, V., Basharina, K., Baskakov, A., Baskov, V., Batista, M., Baturitsky, M., Bautin, V., Bedareva, T., Belokurova, S., Belova, A., Belyaeva, E., Berdnikov, A., Berdnikov, Ya., Berezhnoy, A., Berngardt, A., Bespalov, Yu., Bleko, V., Bliznyuk, L., Bogoslovskii, D., Boiko, A., Boikov, A., Bolsunovskya, M., Boos, E., Borisov, V., Borsch, V., Budkouski, D., Bulanova, S., Bulekov, O., Bunichev, V., Burtebayev, N., Bychanok, D., Casanova, A., Cesar, G., Chemezov, D., Chepurnov, A., Chen, L., Chmill, V., Chukanov, A., Chuzo, A., Danilyuk, A., Datta, A., Dedovich, D., Demichev, M., Deng, G., Denisenko, I., Denisov, O., Derbysheva, T., Derkach, D., Didorenko, A., Dima, M. -O., Doinikov, A., Doronin, S., Dronik, V., Dubinin, F., Dunin, V., Durum, A., Egorov, A., El-Kholy, R., Enik, T., Ermak, D., Erofeev, D., Erokhin, A., Ezhov, D., Fedin, O., Fedotova, Ju., Feofilov, G., Filatov, Yu., Filimonov, S., Frolov, V., Galaktionov, K., Galoyan, A., Garkun, A., Gavrishchuk, O., Gerasimov, S., Gerassimov, S., Gilts, M., Gladilin, L., Golovanov, G., Golovnya, S., Golovtsov, V., Golubev, A., Golubykh, S., Goncharov, P., Gongadze, A., Greben, N., Gregoryev, A., Gribkov, D., Gridin, A., Gritsay, K., Gubachev, D., Guo, J., Gurchin, Yu., Gurinovich, A., Gurov, Yu., Guskov, A., Gutierrez, D., Guzman, F., Hakobyan, A., Han, D., Harkusha, S., Hu, Sh., Igolkin, S., Isupov, A., Ivanov, A., Ivanov, N., Ivantchenko, V., Jin, Sh., Kakurin, S., Kalinichenko, N., Kambar, Y., Kantsyrev, A., Kapitonov, I., Karjavine, V., Karpishkov, A., Katcin, A., Kekelidze, G., Kereibay, D., Khabarov, S., Kharyuzov, P., Khodzhibagiyan, H., Kidanov, E., Kidanova, E., Kim, V., Kiryanov, A., Kishchin, I., Kokoulina, E., Kolbasin, A., Komarov, V., Konak, A., Kopylov, Yu., Korjik, M., Korotkov, M., Korovkin, D., Korzenev, A., Kostenko, B., Kotova, A., Kotzinian, A., Kovalenko, V., Kovyazina, N., Kozhin, M., Kraeva, A., Kramarenko, V., Kremnev, A., Kruchonak, U., Kubankin, A., Kuchinskaia, O., Kulchitsky, Yu., Kuleshov, S., Kulikov, A., Kulikov, V., Kurbatov, V., Kurmanaliev, Zh., Kurochkin, Yu., Kutuzov, S., Kuznetsova, E., Kuyanov, I., Ladygin, E., Ladygin, V., Larionova, D., Lebedev, V., Levchuk, M., Li, P., Li, X., Li, Y., Livanov, A., Lednicki, R., Lobanov, A., Lobko, A., Loshmanova, K., Lukashevich, S., Luschevskaya, E., Lyashko, A. L'vov I., Lysan, V., Lyubovitskij, V., Madigozhin, D., Makarenko, V., Makarov, N., Makhmanazarov, R., Maleev, V., Maletic, D., Malinin, A., Maltsev, A., Maltsev, N., Malkhasyan, A., Malyshev, M., Mamoutova, O., Manakonov, A., Marova, A., Merkin, M., Meshkov, I., Metchinsky, V., Minko, O., Mitrankov, Yu., Mitrankova, M., Mkrtchyan, A., Mkrtchyan, H., Mohamed, R., Morozova, S., Morozikhin, A., Mosolova, E., Mossolov, V., Movchan, S., Mukhamejanov, Y., Mukhamejanova, A., Muzyaev, E., Myktybekov, D., Nagorniy, S., Nassurlla, M., Nechaeva, P., Negodaev, M., Nesterov, V., Nevmerzhitsky, M., Nigmatkulov, G., Nikiforov, D., Nikitin, V., Nikolaev, A., Oleynik, D., Onuchin, V., Orlov, I., Orlova, A., Ososkov, G., Panzieri, D., Parsamyan, B., Pavzderin, P., Pavlov, V., Pedraza, M., Perelygin, V., Peshkov, D., Petrosyan, A., Petrov, M., Petrov, V., Petrukhin, K., Piskun, A., Pivovarov, S., Polishchuk, I., Polozov, P., Polyanskii, V., Ponomarev, A., Popov, V., Popovich, S., Prokhorova, D., Prokofiev, N., Prokoshin, F., Puchkov, A., Pudin, I., Pyata, E., Ratnikov, F., Rasin, V., Red'kov, V., Reshetin, A., Reznikov, S., Rogacheva, N., Romakhov, S., Rouba, A., Rudnev, V., Rusinov, V., Rusov, D., Ryltsov, V., Saduyev, N., Safonov, A., Sakhiyev, S., Salamatin, K., Saleev, V., Samartsev, A., Samigullin, E., Samoylov, O., Saprunov, E., Savenkov, A., Seleznev, A., Semak, A., Senkov, D., Sergeev, A., Seryogin, L., Seryubin, S., Shabanov, A., Shahinyan, A., Shavrin, A., Shein, I., Sheremeteva, A., Shevchenko, V., Shilyaev, K., Shimansky, S., Shinbulatov, S., Shipilov, F., Shipilova, A., Shkarovskiy, S., Shoukovy, D., Shpakov, K., Shreyber, I., Shtejer, K., Shulyakovsky, R., Shunko, A., Sinelshchikova, S., Skachkova, A., Skalnenkov, A., Smirnov, A., Smirnov, S., Snesarev, A., Solin, A., Solin jr., A., Soldatov, E., Solovtsov, V., Song, J., Sosnov, D., Stavinskiy, A., Stekacheva, D., Streletskaya, E., Strikhanov, M., Suarez, O., Sukhikh, A., Sukhovarov, S., Sulin, V., Sultanov, R., Sun, P., Svirida, D., Syresin, E., Tadevosyan, V., Tarasov, O., Tarkovsky, E., Tchekhovsky, V., Tcherniaev, E., Terekhin, A., Terkulov, A., Tereshchenko, V., Teryaev, O., Teterin, P., Tishevsky, A., Tokmenin, V., Topilin, N., Tsiareshka, P., Tumasyan, A., Tyumenkov, G., Usenko, E., Uvarov, L., Uzhinsky, V., Uzikov, Yu., Valiev, F., Vasilieva, E., Vasyukov, A., Vechernin, V., Verkheev, A., Vertogradov, L., Vertogradova, Yu., Vidal, R., Voitishin, N., Volkov, I., Volkov, P., Vorobyov, A., Voskanyan, H., Wang, H., Wang, Y., Xu, T., Yanovich, A., Yeletskikh, I., Yerezhep, N., Yurchenko, S., Zakharov, A., Zamiatin, N., Zamora-Saá, J., Zarochentsev, A., Zelenov, A., Zemlyanichkina, E., Zhabitsky, M., Zhang, J., Zhang, Zh., Zhemchugov, A., Zherebchevsky, V., Zhevlakov, A., Zhigareva, N., Zhou, J., Zhuang, X., Zhukov, I., Zhuravlev, N., Zinin, A., Zmeev, S., Zolotykh, D., Zubarev, E., and Zvyagina, A.
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High Energy Physics - Experiment ,Physics - Instrumentation and Detectors - Abstract
The Spin Physics Detector collaboration proposes to install a universal detector in the second interaction point of the NICA collider under construction (JINR, Dubna) to study the spin structure of the proton and deuteron and other spin-related phenomena using a unique possibility to operate with polarized proton and deuteron beams at a collision energy up to 27 GeV and a luminosity up to $10^{32}$ cm$^{-2}$ s$^{-1}$. As the main goal, the experiment aims to provide access to the gluon TMD PDFs in the proton and deuteron, as well as the gluon transversity distribution and tensor PDFs in the deuteron, via the measurement of specific single and double spin asymmetries using different complementary probes such as charmonia, open charm, and prompt photon production processes. Other polarized and unpolarized physics is possible, especially at the first stage of NICA operation with reduced luminosity and collision energy of the proton and ion beams. This document is dedicated exclusively to technical issues of the SPD setup construction.
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- 2024
14. Measurement-induced state transitions in dispersive qubit readout schemes
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Nesterov, Konstantin N. and Pechenezhskiy, Ivan V.
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Quantum Physics - Abstract
The dispersive-readout scheme enables quantum nondemolition measurement of superconducting qubits. An increased readout power can shorten the readout time and reduce the state discrimination error but can promote qubit transitions into higher noncomputational states. The ability to predict the onset of these measurement-induced state transitions can aid the optimization of qubit circuits and provide means for comparing the readout performance of different qubit types. Building upon the concept of dressed coherent states, we consider two straightforward metrics for determining the maximum number of photons that can be used for dispersive readout without causing state transitions. We focus on the fluxonium readout to demonstrate the independence of the metrics from any qubit-type-specific approximations. The dispersive readout of transmons and other superconducting qubits can be treated universally in the same fashion., Comment: 18 pages, 11 figures; accepted version
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- 2024
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15. Spacetime Foam and Solution of the Cosmological Constant Problem
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Nesterov, Alexander I
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General Relativity and Quantum Cosmology ,High Energy Physics - Theory - Abstract
The cosmological constant problem is a fundamental issue that has puzzled researchers in the fields of theoretical physics and cosmology for a long time. It arises from the discrepancy between the observed value of the cosmological constant and the value predicted by quantum field theory. A new spacetime model based on nonassociative geometry and statistical physics of complex networks offers a fresh perspective on the problem. Our research indicates that spacetime topology plays a crucial role in solving the cosmological constant problem and addressing the dark energy issue. We discovered that spacetime foam significantly impacts the effective cosmological constant, which is determined by the density of topological geons. Furthermore, we demonstrate that the source of dark energy is topological geons, Comment: 8 pages
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- 2024
16. On Clustering Coefficients in Complex Networks
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Nesterov, Alexander I
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Physics - Physics and Society ,Computer Science - Networking and Internet Architecture ,Computer Science - Social and Information Networks - Abstract
The clustering coefficient is a valuable tool for understanding the structure of complex networks. It is widely used to analyze social networks, biological networks, and other complex systems. While there is generally a single common definition for the local clustering coefficient, there are two different ways to calculate the global clustering coefficient. The first approach takes the average of the local clustering coefficients for each node in the network. The second one is based on the ratio of closed triplets to all triplets. It is shown that these two definitions of the global clustering coefficients are strongly inequivalent and may significantly impact the accuracy of the outcome., Comment: 4 pages, 5 figures
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- 2024
17. High-Order Reduced-Gradient Methods for Composite Variational Inequalities
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Nesterov, Yurii
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Mathematics - Optimization and Control - Abstract
This paper can be seen as an attempt of rethinking the {\em Extra-Gradient Philosophy} for solving Variational Inequality Problems. We show that the properly defined {\em Reduced Gradients} can be used instead for finding approximate solutions to Composite Variational Inequalities by the higher-order schemes. Our methods are optimal since their performance is proportional to the lower worst-case complexity bounds for corresponding problem classes. They enjoy the provable hot-start capabilities even being applied to minimization problems. The primal version of our schemes demonstrates a linear rate of convergence under an appropriate uniform monotonicity assumption.
- Published
- 2023
18. Study of polysterene based scintillator ageing in the DANSS experiment
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DANSS Collaboration, Alekseev, I., Belov, V., Bystryakov, A., Danilov, M., Filosofov, D., Fomina, M., Gorovtsov, P., Iusko, Ye., Kazartsev, S., Kobyakin, A., Krapiva, A., Kuznetsov, A., Mashin, N., Machikhiliyan, I., Medvedev, D., Nesterov, V., Ponomarev, D., Rozova, I., Rumyantseva, N., Rusinov, V., Salamatin, A., Samigullin, E., Shevchik, Ye., Shirchenko, M., Shitov, Yu., Skrobova, N., Svirida, D., Tarkovsky, E., Yakovleva, A., Yakushev, E., Zhitnikov, I., and Zinatulina, D.
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Physics - Instrumentation and Detectors - Abstract
DANSS is a spectrometer of reactor antineutrino based on plastic scintillator. The sensitive volume of the detector is made of 2500 polystyrene based scintillator plates with wavelength shifting (WLS) fiber readout (strips). We present a study of the strips light yield during 6.5 years of DANSS continuous running. Overall ageing at the rate $0.55 \pm 0.05(syst.)$ % per year is observed that is considerably smaller than in other similar experiments. We also observe the WLS fiber attenuation length shortening at the rate $0.26 \pm 0.04(stat.)$ % per year., Comment: 9 pages, 7 figures, to be submitted to JINST
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- 2023
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19. Primal subgradient methods with predefined stepsizes
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Nesterov, Yurii
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Mathematics - Optimization and Control - Abstract
In this paper, we suggest a new framework for analyzing primal subgradient methods for nonsmooth convex optimization problems. We show that the classical step-size rules, based on normalization of subgradient, or on the knowledge of optimal value of the objective function, need corrections when they are applied to optimization problems with constraints. Their proper modifications allow a significant acceleration of these schemes when the objective function has favorable properties (smoothness, strong convexity). We show how the new methods can be used for solving optimization problems with functional constraints with possibility to approximate the optimal Lagrange multipliers. One of our primal-dual methods works also for unbounded feasible set.
- Published
- 2023
20. How Contentious Terms About People and Cultures are Used in Linked Open Data
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Nesterov, Andrei, Hollink, Laura, and van Ossenbruggen, Jacco
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Computer Science - Computation and Language ,Computer Science - Artificial Intelligence ,I.2.1 - Abstract
Web resources in linked open data (LOD) are comprehensible to humans through literal textual values attached to them, such as labels, notes, or comments. Word choices in literals may not always be neutral. When outdated and culturally stereotyping terminology is used in literals, they may appear as offensive to users in interfaces and propagate stereotypes to algorithms trained on them. We study how frequently and in which literals contentious terms about people and cultures occur in LOD and whether there are attempts to mark the usage of such terms. For our analysis, we reuse English and Dutch terms from a knowledge graph that provides opinions of experts from the cultural heritage domain about terms' contentiousness. We inspect occurrences of these terms in four widely used datasets: Wikidata, The Getty Art & Architecture Thesaurus, Princeton WordNet, and Open Dutch WordNet. Some terms are ambiguous and contentious only in particular senses. Applying word sense disambiguation, we generate a set of literals relevant to our analysis. We found that outdated, derogatory, stereotyping terms frequently appear in descriptive and labelling literals, such as preferred labels that are usually displayed in interfaces and used for indexing. In some cases, LOD contributors mark contentious terms with words and phrases in literals (implicit markers) or properties linked to resources (explicit markers). However, such marking is rare and non-consistent in all datasets. Our quantitative and qualitative insights could be helpful in developing more systematic approaches to address the propagation of stereotypes via LOD.
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- 2023
21. High Rectification Ratio at Room Temperature in Rhenium(I) Compound
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Rajbangshi, Subas, Pal, Nila, Rahman, Robinur, Nesterov, Vladimir N., Roy, Lisa, Ghosh, Shishir, and Mondal, Prakash Chandra
- Subjects
Condensed Matter - Materials Science - Abstract
Electrical current rectification is an interesting electronic feature, popularly known as a diode. Achieving a high rectification ratio in a molecular junction has been a long-standing goal in molecular electronics. The present work describes mimicking electrical current rectification with pi-stacked rhenium(I) compound sandwiched between two electrical contacts. Among the two mononuclear rhenium compounds studied here, [Re(CO)4(PPh3){(N)-saccharinate}] (1) and [Re(CO)3(phen){(N)-saccharinate}] (2), the latter show strong pi-pi interactions-induced high rectification ratio of ~ 4000 at 2.0 V at room temperature. Alternating current (AC)-based electrical measurements ensuring AC to DC electrical signal conversion at a frequency f of 1 KHz showing 2 can act as an excellent half-wave rectifier. Asymmetric charge injection barrier height at the electrode/Re(I) interfaces of the devices with a stacking configuration of p++-Si/Re compound31nm(2)/ITO originates the flow of electrical current unidirectionally. The charge transport mechanism governed by thermally activated hopping phenomena, and charge carrier propagation is explained through an energy profile considering the Fermi levels of two electrodes, and the energy of frontier molecular orbitals, HOMO, and LUMO, confirming rectification is of a molecular origin. The present work paves the way to combine different organometallic compounds as circuit elements in nanoelectronic devices to achieve numerous exciting electronic features., Comment: 16 pages, 5 figures
- Published
- 2023
22. High-throughput screening for cell binding and repulsion peptides on multifunctionalized surfaces
- Author
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Sonnentag, Steffen J., Jenne, Felix, Orian-Rousseau, Véronique, and Nesterov-Mueller, Alexander
- Published
- 2024
- Full Text
- View/download PDF
23. Correction: Chaotic aging: intrinsically disordered proteins in aging-related processes
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Manuylov, Vladimir D., Ilyinsky, Nikolay S., Nesterov, Semen V., Saqr, Baraa M. G. A., Dayhoff, II, Guy W., Zinovev, Egor V., Matrenok, Simon S., Fonin, Alexander V., Kuznetsova, Irina M., Turoverov, Konstantin K., Ivanovich, Valentin, and Uversky, Vladimir N.
- Published
- 2024
- Full Text
- View/download PDF
24. Ethical and legal aspects of using generative artificial intelligence technologies in preparing qualification and scientific papers
- Author
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V. V. Ivanov, A. Yu. Nesterov, and I. P. Yanchenko
- Subjects
generative artificial intelligence ,chatgpt ,openai ,yandexgpt ,gigachat ,higher education ,qualification work ,subjectivity ,copyright ,History (General) ,D1-2009 ,Language and Literature - Abstract
The article is devoted to the issue of using generative AI in the higher education system of the Russian Federation. The relevance of this issue is due to the avalanche-like growth in the use of generation by students and postgraduates in the 2023/24 academic year, the heated discussions that arose in this regard within universities, a series of publications in the media, the lack of development of the legal aspects of the use of generation, the ambiguity of its ethical grounds and consequences. The goal of the authors' collective is to formulate a collective position of teachers of classical humanitarian knowledge, which consists in the inadmissibility of using generative AI in the preparation of qualification and scientific papers. The work examines the regulatory aspects of the use of generation, conducts an experimental study of generative systems popular in the Russian-speaking space, and formulates a fundamental threat to subjectivity at the level of the individual and the collective, arising in connection with the use of generative AI. The general conclusion of the work is the need for careful legal and ethical regulation of the areas and methods of using generative systems in higher education.
- Published
- 2025
- Full Text
- View/download PDF
25. Emerging Technologies for the Assessment of Natural Killer Cell Activity
- Author
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Anna Luise Grab and Alexander Nesterov-Müller
- Subjects
NK cell functionality ,cytokine release ,standardized assays ,multiparameter analysis ,spatial techniques ,Science - Abstract
Understanding natural killer (NK) cell functionality is essential in developing more effective immunotherapeutic strategies that can enhance patient outcomes, especially in the context of cancer treatment. This review provides a comprehensive overview of both traditional and novel techniques for evaluating NK cell functionality, focusing on multiparameter assays and spatial methods that illuminate NK cell interactions within their microenvironment. We discuss the significance of standardized assays for assessing NK cell function across various research and clinical settings, including cancer immunotherapy, infectious diseases, and transplantation. Key factors influencing NK cell functionality include the origin of the sample, target–effector ratios, the functional state of NK cells, and the impact of pre-treatment conditions and their natural aging effect on NK cell activity. By emphasizing the importance of selecting a suitable technique for reliable measurements, especially for longitudinal monitoring, this review aims to give an overview on techniques to measure NK cell functionality in vitro and show the interaction with their microenvironment cells by spatial imaging. Ultimately, our understanding of NK cell functionality could be critical to biomarker development, drug design, and understanding of disease progression in the field of oncology or infectious disease.
- Published
- 2024
- Full Text
- View/download PDF
26. Eurasian-Scale Experimental Satellite-based Quantum Key Distribution with Detector Efficiency Mismatch Analysis
- Author
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Khmelev, Aleksandr V., Duplinsky, Alexey V., Bakhshaliev, Ruslan M., Ivchenko, Egor I., Pismeniuk, Liubov V., Mayboroda, Vladimir F., Nesterov, Ivan S., Chernov, Arkadiy N., Trushechkin, Anton S., Kiktenko, Evgeniy O., Kurochkin, Vladimir L., and Fedorov, Aleksey K.
- Subjects
Quantum Physics ,Physics - Space Physics - Abstract
The Micius satellite is the pioneering initiative to demonstrate quantum teleportation, entanglement distribution, quantum key distribution (QKD), and quantum-secured communications experiments at the global scale. In this work, we report on the results of the 600-mm-aperture ground station design which has enabled the establishment of a quantum-secured link between the Zvenigorod and Nanshan ground stations using the Micius satellite. As a result of a quantum communications session, an overall sifted key of 2.5 Mbits and a total final key length of 310 kbits have been obtained. We present an extension of the security analysis of the realization of satellite-based QKD decoy-state protocol by taking into account the effect of the detection-efficiency mismatch for four detectors. We also simulate the QKD protocol for the satellite passage and by that validate our semi-empirical model for a realistic receiver, which is in good agreement with the experimental data. Our results pave the way to the considerations of realistic imperfection of the QKD systems, which are important in the context of their practical security., Comment: 8+2 pages, 5+2 figures
- Published
- 2023
- Full Text
- View/download PDF
27. Deciphering Diagnoses: How Large Language Models Explanations Influence Clinical Decision Making
- Author
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Umerenkov, D., Zubkova, G., and Nesterov, A.
- Subjects
Computer Science - Computation and Language - Abstract
Clinical Decision Support Systems (CDSS) utilize evidence-based knowledge and patient data to offer real-time recommendations, with Large Language Models (LLMs) emerging as a promising tool to generate plain-text explanations for medical decisions. This study explores the effectiveness and reliability of LLMs in generating explanations for diagnoses based on patient complaints. Three experienced doctors evaluated LLM-generated explanations of the connection between patient complaints and doctor and model-assigned diagnoses across several stages. Experimental results demonstrated that LLM explanations significantly increased doctors' agreement rates with given diagnoses and highlighted potential errors in LLM outputs, ranging from 5% to 30%. The study underscores the potential and challenges of LLMs in healthcare and emphasizes the need for careful integration and evaluation to ensure patient safety and optimal clinical utility.
- Published
- 2023
28. Evaluation of neutronic parameters for RITM-200 reactor unit considering (238U+235U)O2, (232Th+235U)O2 and (232Th+233U)O2 dispersed fuel using MCU-PTR
- Author
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Alhassan, Samiru, Beliavskii, Sergey V., and Nesterov, Vladimir N.
- Subjects
Physics - Instrumentation and Detectors ,Physics - Computational Physics - Abstract
Simulation tools have become an integral tool in the analysis of neutronic parameters of reactor units. These simulation tools are built to solve the neutron transport equation. In this article, the MCU-PTR simulation tool is used in the evaluation of the possibility of achieving extra-long fuel lifetime in the RITM-200 reactor unit with consideration to the fuel composition. The three dispersed fuel compositions (238U+235U)O2, (232Th+235U)O2 and (232Th+233U)O2 are simulated at varying fuel element diameter of 4.9 mm to 8.9 mm with 1 mm interval. From the simulation, the dependence of reactivity margin on the fuel burnup of the three dispersed fuels were established. The dependence of the effective multiplication factor (keff) on the reactor operation time for the three dispersed fuel composition were also determined. From the results, it can be deduced that transition of the fuel from (238U + 235U)O2 to (232Th + 235U)O2 results in a 12% increase in the fuel burnup and no change in fuel campaign. While the transition from (238U + 235U)O2 to (232Th + 233U)O2 leads to a 32.4% increase in the fuel campaign and 45.6% increase in the fuel burnup. It has also been shown that the optimal fuel element diameter is 7.9 mm for (232Th + 233U)O2 dispersed fuel. At this diameter, it is possible to increase the duration of the fuel campaign by 85.3% and achieve a fuel burnup of 51.9% in comparison to the design fuel diameter of 6.9 mm for (238U + 235U)O2 dispersed fuel., Comment: The 5 pages and 5 figures for this manuscript as published as conference proceeding at the International Youth Forum Russia - Africa: Nuclear education-potential for successful regional development
- Published
- 2023
29. Asymptotics of solving a singularly perturbed system of transport equations with fast and slow components in the critical case
- Author
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Nesterov, Andrey
- Subjects
Mathematics - Analysis of PDEs ,35C20 (Primary) 35F35 (Secondary) - Abstract
An asymptotic expansion with respect to a small parameter of the solution of the Cauchy problem is constructed for a system of three transfer equations, two of which are singularly perturbed by the degeneracy of the entire senior part of the transfer operator, and the third equation clearly does not contain a small parameter. The peculiarity of the problem is that it belongs to the so-called critical case: the solution of a degenerate problem is a one-parameter family. The asymptotic expansion of the solution under smooth initial conditions is constructed as the sum of the regular part and boundary functions.
- Published
- 2023
30. Revealing and Studying of the Mechanism of Moisture Removal from Materials on Exposure to Ultrasonic Noncontact Effect
- Author
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Khmelev, V. N., Shalunov, A. V., Terent’ev, S. A., Golykh, R. N., and Nesterov, V. A.
- Published
- 2024
- Full Text
- View/download PDF
31. Application of the Duperier method to the analysis of the cosmic muon flux dependence on the meteorological parameters, based on the DANSS detector data
- Author
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Alekseev, I., Belov, V., Danilov, M., Filosofov, D., Fomina, M., Kazartsev, S., Kobyakin, A., Kuznetsov, A., Machikhiliyan, I., Medvedev, D., Nesterov, V., Ponomarev, D., Rozova, I., Rumyantseva, N., Rusinov, V., Samigullin, E., Shevchik, Ye., Shirchenko, M., Shitov, Yu., Skrobova, N., Svirida, D., Tarkovsky, E., Yakovleva, A., Yakushev, E., Zhitnikov, I., and Zinatulina, D.
- Subjects
Physics - Instrumentation and Detectors ,High Energy Physics - Experiment - Abstract
The detector DANSS is located under n industrial nuclear reactor at Kalininskaya Nuclear Power Plant. This location provides ~ 50 m.w.e. reduction of the cosmic muon flux in the vertical direction, which places the experiment in an intermediate position between ground and underground experiments in terms of shielding from the cosmic rays. The detector DANSS is located under an industrial nuclear reactor at Kalininskaya Nuclear Power Plant. This location provides ~50 m.w.e. reduction of the cosmic muon flux in the vertical direction, which places the experiment in an intermediate position between ground and underground experiments in terms of shielding from the cosmic rays. The detector's sensitive area consists of 2500 plastic scintillator counters, each 100x4x1 cm$^3$ in size, making in total a 1 m$^3$ volume, which is surrounded by a muon veto system and multiple layers of passive shielding. The main goal of the DANSS experiment is to study the antineutrino spectra at different distances from the source. For this purpose the detector is placed on a lifting platform, and the data is collected at three positions: 10.9 m, 11.9 m and 12.9 m from the center of the reactor core. The detector is capable of reconstructing muon tracks passing though the sensitive volume. In this work the barometric, height and temperature correlation coefficients are calculated in three areas of the zenith angle $\theta$ using the Duperier approach. These results are based on the muon data collected during four years., Comment: 7 pages, 3 figures, submitted to JETP letters (in Russian)
- Published
- 2023
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- View/download PDF
32. Convex quartic problems: homogenized gradient method and preconditioning
- Author
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Dragomir, Radu-Alexandru and Nesterov, Yurii
- Subjects
Mathematics - Optimization and Control ,90C25 - Abstract
We consider a convex minimization problem for which the objective is the sum of a homogeneous polynomial of degree four and a linear term. Such task arises as a subproblem in algorithms for quadratic inverse problems with a difference-of-convex structure. We design a first-order method called Homogenized Gradient, along with an accelerated version, which enjoy fast convergence rates of respectively $\mathcal{O}(\kappa^2/K^2)$ and $\mathcal{O}(\kappa^2/K^4)$ in relative accuracy, where $K$ is the iteration counter. The constant $\kappa$ is the quartic condition number of the problem. Then, we show that for a certain class of problems, it is possible to compute a preconditioner for which this condition number is $\sqrt{n}$, where $n$ is the problem dimension. To establish this, we study the more general problem of finding the best quadratic approximation of an $\ell_p$ norm composed with a quadratic map. Our construction involves a generalization of the so-called Lewis weights., Comment: 27 pages, 2 figures
- Published
- 2023
33. On quasimap invariants of moduli spaces of Higgs bundles
- Author
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Nesterov, Denis
- Subjects
Mathematics - Algebraic Geometry - Abstract
We compute odd-degree genus 1 quasimap (and Gromov--Witten) invariants of moduli spaces of Higgs $\mathrm{SL}_2$-bundles on a curve of genus $g\geq2$. We also compute certain invariants for all prime ranks. This proves some parts of author's conjectures on quasimap invariants of moduli spaces of Higgs bundles. More generally, our methods provide a computation scheme for genus 1 quasimap (and Gromov--Witten) invariants in the case when degrees of maps are coprime to the rank. This requires a careful analysis of the localisation formula for certain Quot schemes parametrising higher-rank quotients on an elliptic curve. Invariants for degrees which are not coprime to the rank exhibit a very different structure for a reason that we explain., Comment: 30 pages, 1 figure
- Published
- 2023
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34. Quasimaps to moduli spaces of sheaves and related topics
- Author
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Nesterov, Denis
- Subjects
Mathematics - Algebraic Geometry ,Mathematics - Symplectic Geometry - Abstract
This is a review article based on a mini-course comprised of four talks given by the author at Berkeley., Comment: 23 pages, 5 figures
- Published
- 2023
35. Predicting COVID-19 and pneumonia complications from admission texts
- Author
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Umerenkov, Dmitriy, Cherkashin, Oleg, Nesterov, Alexander, Gombolevskiy, Victor, Demko, Irina, Yalunin, Alexander, and Kokh, Vladimir
- Subjects
Computer Science - Computation and Language ,Computer Science - Artificial Intelligence - Abstract
In this paper we present a novel approach to risk assessment for patients hospitalized with pneumonia or COVID-19 based on their admission reports. We applied a Longformer neural network to admission reports and other textual data available shortly after admission to compute risk scores for the patients. We used patient data of multiple European hospitals to demonstrate that our approach outperforms the Transformer baselines. Our experiments show that the proposed model generalises across institutions and diagnoses. Also, our method has several other advantages described in the paper.
- Published
- 2023
36. Risks of infection with the HIV: Sociological assessment
- Author
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I. B. Nazarova and R. S. Nesterov
- Subjects
risk ,risk behavior ,awareness ,health ,hiv ,non-profit organization (npo) ,risk groups ,sociological survey ,Sociology (General) ,HM401-1281 - Abstract
The human immunodeficiency virus (HIV) is a complex socially significant disease associated with risks mainly for representatives of groups practicing deviant behavior and requiring special attention from the state and society. The article presents a comprehensive description of representatives of the high-risk group for the HIV infection, including their health status, behavioral characteristics, types, combinations and perceptions of risks, which would allow for a more optimal organization of the work of social and medical services with this group. The article is based on the results of the empirical study conducted in 2022: 3,792 clients of the charitable foundation “Support for Social Initiatives and Public Health” were questioned within the HIV preventive work with representatives of high-risk groups. A significant part of clients are people under 22 years of age (25 %). Their main risks were divided into condition risks and behavioral risks. Condition risks are as follows: current and past illness (29 % were diagnosed with an infection or several ones, including the HIV), unemployment (21 %), difficult financial situation (9 %); and for foreign citizens also lack of citizenship (24 %) and not speaking Russian (5 %). Behavioral risks (actions leading to loss of health or inaction in health protection) are as follows: 15 % of clients use drugs (including with shared equipment for injecting), the majority (76 %) consciously agree to unprotected sex and have multiple sexual partners (the average number is 21 per year). In general, representatives of high-risk groups tend to underestimate their risks, and awareness is not a decisive positive factor, i.e., it does not necessarily change behavior to less risky. Moreover, long-term risk practices together with knowledge of risks and protective measures can negatively affect perceptions of risks; thus, clients with experience of risk behavior consider risks as less dangerous or deny risks in principle, which is an additional risk for both the person and one’s partners.
- Published
- 2024
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- View/download PDF
37. ANALYZING USER BEHAVIOR PATTERNS FOR PERSONALIZED RECOMMENDER SYSTEMS IN E-COMMERCE: A LITERATURE REVIEW
- Author
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Vasyl Nesterov
- Subjects
recommender systems ,e-commerce ,user behavior patterns ,evolving e-commerce ,personalized recommendations ,Automation ,T59.5 - Abstract
Abstract: E-commerce thrives on a user-centric strategy, and recommender systems are at the cutting edge of personalizing the purchasing experience. These systems may forecast preferences and recommend appropriate items by analyzing user behavior patterns, resulting in many benefits such as increased customer satisfaction, increased sales and conversions, and increased efficiency. To accomplish these benefits, recommender systems utilize complex algorithms that examine numerous elements of user behavior such as purchase history, browsing behavior, search queries, demographic data, and implicit feedback. Sophisticated algorithms can recognise complicated patterns in user data, resulting in more accurate and personalized suggestions. Analyzing user reviews, product descriptions, and social media interactions may help you better understand consumer preferences and product features. Systems can make real-time suggestions depending on a user’s current browsing session, resulting in a more dynamic purchasing experience. Personalized recommender systems will play an increasingly important role in molding the future of e-commerce as user behavior analysis techniques are constantly refined. The study intends to make important advances to the field of personalized recommender systems by undertaking a thorough research of user behavior patterns in the e-commerce domain. We strive to improve the performance of recommender systems by extracting insightful features from various data sources and exploring sophisticated machine learning techniques, resulting in a more engaging and tailored user experience that fosters customer satisfaction and drives business growth. A comprehensive review of user behavior patterns and their influence on personalized recommender systems in the e-commerce industry reveals the critical role of data analysis and machine learning algorithms in tailoring product suggestions to individual preferences, thereby enhancing customer satisfaction and driving sales growth. By implementing the tactics and approaches expressed in this study, e-commerce platforms may stay ahead of the curve, providing a smooth and tailored purchasing experience that surpasses customer expectations and contributes to their competitive advantage in the changing e-commerce environment.
- Published
- 2024
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- View/download PDF
38. Transregional Cooperation of German Federal States with Eastern Regions and Countries (Late 20th — 21st Century)
- Author
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E. O. Muslimova, A. G. Nesterov, and N. V. Rakitina
- Subjects
transregional cooperation ,regions ,european union ,federal republic of germany ,germany ,china ,india ,vietnam ,Slavic languages. Baltic languages. Albanian languages ,PG1-9665 - Abstract
This study examines the formation and development of transregional relations between the federal states of Germany (Bundesländer) and Eastern countries and regions. It presents the findings of a normative-legal analysis of the foundations of international and foreign policy activities of German federal states, based on national legislation. The focus is on the institutional framework for cross-border interactions between individual administrative units of the Federal Republic of Germany and their foreign partners. The research explores partnerships with both neighboring Middle Eastern territories and more distant Eastern regions. The findings indicate that the international and foreign economic activities of the German states are extensive, aligning with the opportunities outlined in Germany’s constitutional documents, and are significantly broader and more diverse compared to similar activities in the regions of France and Italy. It has been identified that German states engage in a system of “horizontal partnerships” primarily with provinces of the People’s Republic of China. Additionally, it is reported that a principle of “network cooperation” is applied to most other Eastern countries, encompassing not only economic but also scientific, cultural, and humanitarian ties. The study demonstrates that among the examined EU countries at the regional level, German federal states lead in establishing the most successful and effective partnerships with regions in Eastern countries.
- Published
- 2024
- Full Text
- View/download PDF
39. Identity Conflict in Modern Greece: Revisiting the Concept of Helleno-Christian Synthesis?
- Author
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V. V. Vorotnikov and D. S. Nesterov
- Subjects
greece ,national identity ,european values ,modern greek state ,orthodox church ,Philosophy. Psychology. Religion - Abstract
The relevance of addressing the topic of national identity is determined by the high dynamism of changes in the societal space of the modern world, which complicates and at the same time requires constant study of the peculiarities of self-identification of certain social communities. From this point of view, the identity conflict in modern Greece provides extensive material that, despite the breadth and depth of the available research literature, has not yet been thoroughly analysed. The purpose of this study is to examine the dynamics of change in the religious component of Greek identity influenced by the processes of European integration and to explore how so-called European values are adapted to at the national level. To this end, the following objectives are achieved: firstly, the main value-based and religious attitudes of the Greek society in the process of national identity formation are identified; secondly, the available data on the current religious situation in the country are systematized; finally, the cases of identity conflict in modern Greece are analysed. The research materials include legal documents, data from official websites, as well as media materials. The research methodology relies upon axiological and hermeneutical approaches; the method of narrative analysis and discourse analysis are also used. The results of the study show that Helleno-Christian formula is an attempt to bring together Greek identity with its antique background and the Church claims to have a significant role in the process. The historic overview as well as modern statistics and data indicate patterns in the identification of the people of Greece, including cases of identity conflicts. The research substantiates the conclusion about the significant impact of the erosion of the religious component on the process of transformation of Greek identity. European legislation, as well as the ‘European values’ promoted by Brussels, have led to the deterioration of the key formula of the ‘Helleno-Christian synthesis’, which defined the design of Greek identity during the time of gaining independence and has retained its influence until recently. While, on the one hand, there is an expansion of rights and freedoms, including religious freedoms, on the other hand, a model of society imposed from above and often not supported from below, which was not typical for Greece before its accession to the EU, is being established. The identity conflict associated with this process polarises society and leads not only political parties but also religious institutions to revise their value-based and ideological platforms.
- Published
- 2024
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- View/download PDF
40. The quartic anharmonic oscillator - an oscillator-basis expansion approach. I. Energy levels study and calculation
- Author
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V. A. Babenko and A. V. Nesterov
- Subjects
anharmonic oscillator ,oscillator basis ,quantum field theory. ,Atomic physics. Constitution and properties of matter ,QC170-197 - Abstract
For the quantum quartic anharmonic oscillator with the Hamiltonian H=0.5(p2+x2)+λx4 which is one of the classic traditional quantum-mechanical and quantum-field-theory models, its main physical characteristics and properties are thoroughly studied and calculated based on the system's wave function expansion in a complete set of the harmonic oscillator eigenfunctions, i.e., in the basis of eigenfunctions {φ(0)n} of the unperturbed Hamiltonian H=0.5(p2+x2). Very good convergence of the calculated energy levels of the anharmonic oscillator is demonstrated with respect to the number of basis functions included in the expansion, across a wide range of variation of the parameter λ. Thus, we have computed the energies of the ground and the first six excited states of the system for an exceptionally wide range of the oscillator coupling constant λ. In general, the proposed method provides a very good and accurate way to calculate all system characteristics.
- Published
- 2024
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- View/download PDF
41. Discovering hierarchical process models: an approach based on events partitioning
- Author
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Antonina K. Begicheva, Irina A. Lomazova, and Roman A. Nesterov
- Subjects
process mining ,petri nets ,workflow nets ,process discovery ,hierarchical process model ,event log ,Information technology ,T58.5-58.64 - Abstract
Process mining is a field of computer science that deals with the discovery and analysis of process models based on automatically generated event logs. Currently, many companies are using this technology to optimize and improve their business processes. However, a discovered process model may be too detailed, sophisticated, and difficult for experts to understand. In this paper, we consider a problem of discovering the hierarchical business process model from a low-level event log, i. e., the problem of the automatic synthesis of more readable and understandable process models based on the data stored in the event logs of information systems. The discovery of better-structured and more readable process models is extensively studied in the framework of process mining research from different perspectives. In this paper, we present an algorithm for discovering hierarchical process models represented as two-level workflow Petri nets. The algorithm is based on predefined event partitioning so that this partitioning defines a sub-process corresponding to a high-level transition at the top level of a two-level net. In contrast to existing solutions, our algorithm does not impose restrictions on the process control flow and allows for concurrency and iterations.
- Published
- 2024
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- View/download PDF
42. Regions of Italy in Context of Italian-Chinese Relations in 21st Century
- Author
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A. G. Nesterov and E. O. Muslimova
- Subjects
transregional cooperation ,regions ,european union ,italy ,china ,international relations ,international economic relations ,Slavic languages. Baltic languages. Albanian languages ,PG1-9665 - Abstract
This study examines the development of transregional relations between the regions of Italy and those of China, including the Special Administrative Regions of Hong Kong and Macau. It highlights the interplay between centrifugal and centripetal tendencies within the framework of Italy’s ‘center — regions’ relationship system. The analysis provides insights into the normative foundations of international and foreign policy activities of Italy’s territorial communities, grounded in the national Constitution and relevant legislation. The findings demonstrate that Italian regions possess very limited capabilities for independent foreign and economic policy initiatives, a restriction stemming from the Italian Constitution, which permits regional cooperation only in the realms of economy and culture. In contrast, among the regions of China, only Hong Kong and Macau exhibit the capacity for autonomous external activities. Furthermore, it is revealed that Chinese migrants in Italy play a significant role in fostering Italian-Chinese interregional ties, maintaining connections with their homeland. The study concludes that Italian regions are notably less active internationally compared to regions in other EU countries.
- Published
- 2024
- Full Text
- View/download PDF
43. Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at s NN $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV
- Author
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The ALICE collaboration, S. Acharya, D. Adamová, A. Adler, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, S. U. Ahn, I. Ahuja, A. Akindinov, M. Al-Turany, D. Aleksandrov, B. Alessandro, H. M. Alfanda, R. Alfaro Molina, B. Ali, A. Alici, N. Alizadehvandchali, A. Alkin, J. Alme, G. Alocco, T. Alt, I. Altsybeev, J. R. Alvarado, M. N. Anaam, C. Andrei, A. Andronic, V. Anguelov, F. Antinori, P. Antonioli, N. Apadula, L. Aphecetche, H. Appelshäuser, C. Arata, S. Arcelli, M. Aresti, R. Arnaldi, J. G. M. C. A. Arneiro, I. C. Arsene, M. Arslandok, A. Augustinus, R. Averbeck, M. D. Azmi, A. Badalà, J. Bae, Y. W. Baek, X. Bai, R. Bailhache, Y. Bailung, A. Balbino, A. Baldisseri, B. Balis, D. Banerjee, Z. Banoo, R. Barbera, F. Barile, L. Barioglio, M. Barlou, G. G. Barnaföldi, L. S. Barnby, V. Barret, L. Barreto, C. Bartels, K. Barth, E. Bartsch, N. Bastid, S. Basu, G. Batigne, D. Battistini, B. Batyunya, D. Bauri, J. L. Bazo Alba, I. G. Bearden, C. Beattie, P. Becht, D. Behera, I. Belikov, A. D. C. Bell Hechavarria, F. Bellini, R. Bellwied, S. Belokurova, V. Belyaev, G. Bencedi, S. Beole, Y. Berdnikov, A. Berdnikova, L. Bergmann, M. G. Besoiu, L. Betev, P. P. Bhaduri, A. Bhasin, M. A. Bhat, B. Bhattacharjee, L. Bianchi, N. Bianchi, J. Bielčík, J. Bielčíková, J. Biernat, A. P. Bigot, A. Bilandzic, G. Biro, S. Biswas, N. Bize, J. T. Blair, D. Blau, M. B. Blidaru, N. Bluhme, C. Blume, G. Boca, F. Bock, T. Bodova, A. Bogdanov, S. Boi, J. Bok, L. Boldizsár, M. Bombara, P. M. Bond, G. Bonomi, H. Borel, A. Borissov, A. G. Borquez Carcamo, H. Bossi, E. Botta, Y. E. M. Bouziani, L. Bratrud, P. Braun-Munzinger, M. Bregant, M. Broz, G. E. Bruno, M. D. Buckland, D. Budnikov, H. Buesching, S. Bufalino, O. Bugnon, P. Buhler, Z. Buthelezi, S. A. Bysiak, M. Cai, H. Caines, A. Caliva, E. Calvo Villar, J. M. M. Camacho, P. Camerini, F. D. M. Canedo, S. L. Cantway, M. Carabas, A. A. Carballo, F. Carnesecchi, R. Caron, L. A. D. Carvalho, J. Castillo Castellanos, F. Catalano, C. Ceballos Sanchez, I. Chakaberia, P. Chakraborty, S. Chandra, S. Chapeland, M. Chartier, S. Chattopadhyay, T. Cheng, C. Cheshkov, B. Cheynis, V. Chibante Barroso, D. D. Chinellato, E. S. Chizzali, J. Cho, S. Cho, P. Chochula, P. Christakoglou, C. H. Christensen, P. Christiansen, T. Chujo, M. Ciacco, C. Cicalo, F. Cindolo, M. R. Ciupek, G. Clai, F. Colamaria, J. S. Colburn, D. Colella, M. Colocci, M. Concas, G. Conesa Balbastre, Z. Conesa del Valle, G. Contin, J. G. Contreras, M. L. Coquet, T. M. Cormier, P. Cortese, M. R. Cosentino, F. Costa, S. Costanza, C. Cot, J. Crkovská, P. Crochet, R. Cruz-Torres, E. Cuautle, P. Cui, A. Dainese, M. C. Danisch, A. Danu, P. Das, S. Das, A. R. Dash, S. Dash, A. De Caro, G. de Cataldo, J. de Cuveland, A. De Falco, D. De Gruttola, N. De Marco, C. De Martin, S. De Pasquale, R. Deb, S. Deb, R. J. Debski, K. R. Deja, R. Del Grande, L. Dello Stritto, W. Deng, P. Dhankher, D. Di Bari, A. Di Mauro, R. A. Diaz, T. Dietel, Y. Ding, R. Divià, D. U. Dixit, Ø. Djuvsland, U. Dmitrieva, A. Dobrin, B. Dönigus, J. M. Dubinski, A. Dubla, S. Dudi, P. Dupieux, M. Durkac, N. Dzalaiova, T. M. Eder, R. J. Ehlers, V. N. Eikeland, F. Eisenhut, D. Elia, B. Erazmus, F. Ercolessi, F. Erhardt, M. R. Ersdal, B. Espagnon, G. Eulisse, D. Evans, S. Evdokimov, L. Fabbietti, M. Faggin, J. Faivre, F. Fan, W. Fan, A. Fantoni, M. Fasel, P. Fecchio, A. Feliciello, G. Feofilov, A. Fernández Téllez, L. Ferrandi, M. B. Ferrer, A. Ferrero, C. Ferrero, A. Ferretti, V. J. G. Feuillard, V. Filova, D. Finogeev, F. M. Fionda, F. Flor, A. N. Flores, S. Foertsch, I. Fokin, S. Fokin, E. Fragiacomo, E. Frajna, U. Fuchs, N. Funicello, C. Furget, A. Furs, T. Fusayasu, J. J. Gaardhøje, M. Gagliardi, A. M. Gago, C. D. Galvan, D. R. Gangadharan, P. Ganoti, C. Garabatos, T. García Chávez, E. Garcia-Solis, K. Garg, C. Gargiulo, K. Garner, P. Gasik, A. Gautam, M. B. Gay Ducati, M. Germain, A. Ghimouz, C. Ghosh, M. Giacalone, P. Giubellino, P. Giubilato, A. M. C. Glaenzer, P. Glässel, E. Glimos, D. J. Q. Goh, V. Gonzalez, L. H. González-Trueba, M. Gorgon, S. Gotovac, V. Grabski, L. K. Graczykowski, E. Grecka, A. Grelli, C. Grigoras, V. Grigoriev, S. Grigoryan, F. Grosa, J. F. Grosse-Oetringhaus, R. Grosso, D. Grund, G. G. Guardiano, R. Guernane, M. Guilbaud, K. Gulbrandsen, T. Gündem, T. Gunji, W. Guo, A. Gupta, R. Gupta, L. Gyulai, M. K. Habib, C. Hadjidakis, F. U. Haider, H. Hamagaki, A. Hamdi, M. Hamid, Y. Han, R. Hannigan, M. R. Haque, J. W. Harris, A. Harton, H. Hassan, D. Hatzifotiadou, P. Hauer, L. B. Havener, S. T. Heckel, E. Hellbär, H. Helstrup, M. Hemmer, T. Herman, G. Herrera Corral, F. Herrmann, S. Herrmann, K. F. Hetland, B. Heybeck, H. Hillemanns, C. Hills, B. Hippolyte, F. W. Hoffmann, B. Hofman, B. Hohlweger, G. H. Hong, M. Horst, A. Horzyk, Y. Hou, P. Hristov, C. Hughes, P. Huhn, L. M. Huhta, T. J. Humanic, A. Hutson, D. Hutter, J. P. Iddon, R. Ilkaev, H. Ilyas, M. Inaba, G. M. Innocenti, M. Ippolitov, A. Isakov, T. Isidori, M. S. Islam, M. Ivanov, V. Ivanov, M. Jablonski, B. Jacak, N. Jacazio, P. M. Jacobs, S. Jadlovska, J. Jadlovsky, S. Jaelani, L. Jaffe, C. Jahnke, M. J. Jakubowska, M. A. Janik, T. Janson, M. Jercic, S. Jia, A. A. P. Jimenez, F. Jonas, J. M. Jowett, J. Jung, M. Jung, A. Junique, A. Jusko, J. Kaewjai, P. Kalinak, A. S. Kalteyer, A. Kalweit, V. Kaplin, A. Karasu Uysal, D. Karatovic, O. Karavichev, T. Karavicheva, P. Karczmarczyk, E. Karpechev, M. J. Karwowska, U. Kebschull, R. Keidel, D. L. D. Keijdener, M. Keil, B. Ketzer, A. M. Khan, S. Khan, A. Khanzadeev, Y. Kharlov, A. Khatun, A. Khuntia, M. B. Kidson, B. Kileng, B. Kim, C. Kim, D. J. Kim, E. J. Kim, J. Kim, J. S. Kim, M. Kim, S. Kim, T. Kim, K. Kimura, S. Kirsch, I. Kisel, S. Kiselev, A. Kisiel, J. P. Kitowski, J. L. Klay, J. Klein, S. Klein, C. Klein-Bösing, M. Kleiner, T. Klemenz, A. Kluge, A. G. Knospe, C. Kobdaj, T. Kollegger, A. Kondratyev, N. Kondratyeva, E. Kondratyuk, J. Konig, S. A. Konigstorfer, P. J. Konopka, G. Kornakov, M. Korwieser, S. D. Koryciak, A. Kotliarov, V. Kovalenko, M. Kowalski, V. Kozhuharov, I. Králik, A. Kravčáková, L. Krcal, L. Kreis, M. Krivda, F. Krizek, K. Krizkova Gajdosova, M. Kroesen, M. Krüger, D. M. Krupova, E. Kryshen, V. Kučera, C. Kuhn, P. G. Kuijer, T. Kumaoka, D. Kumar, L. Kumar, N. Kumar, S. Kumar, S. Kundu, P. Kurashvili, A. Kurepin, A. B. Kurepin, A. Kuryakin, S. Kushpil, J. Kvapil, M. J. Kweon, J. Y. Kwon, Y. Kwon, S. L. La Pointe, P. La Rocca, Y. S. Lai, A. Lakrathok, M. Lamanna, R. Langoy, P. Larionov, E. Laudi, L. Lautner, R. Lavicka, T. Lazareva, R. Lea, H. Lee, G. Legras, J. Lehrbach, T. M. Lelek, R. C. Lemmon, I. León Monzón, M. M. Lesch, E. D. Lesser, M. Lettrich, P. Lévai, X. Li, X. L. Li, J. Lien, R. Lietava, I. Likmeta, B. Lim, S. H. Lim, V. Lindenstruth, A. Lindner, C. Lippmann, A. Liu, D. H. Liu, J. Liu, I. M. Lofnes, C. Loizides, S. Lokos, J. Lömker, P. Loncar, J. A. Lopez, X. Lopez, E. López Torres, P. Lu, J. R. Luhder, M. Lunardon, G. 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Munzer, H. Murakami, S. Murray, L. Musa, J. Musinsky, J. W. Myrcha, B. Naik, A. I. Nambrath, B. K. Nandi, R. Nania, E. Nappi, A. F. Nassirpour, A. Nath, C. Nattrass, M. N. Naydenov, A. Neagu, A. Negru, L. Nellen, S. V. Nesbo, G. Neskovic, D. Nesterov, B. S. Nielsen, E. G. Nielsen, S. Nikolaev, S. Nikulin, V. Nikulin, F. Noferini, S. Noh, P. Nomokonov, J. Norman, N. Novitzky, P. Nowakowski, A. Nyanin, J. Nystrand, M. Ogino, A. Ohlson, V. A. Okorokov, J. Oleniacz, A. C. Oliveira Da Silva, M. H. Oliver, A. Onnerstad, C. Oppedisano, A. Ortiz Velasquez, J. Otwinowski, M. Oya, K. Oyama, Y. Pachmayer, S. Padhan, D. Pagano, G. Paić, S. Paisano-Guzmán, A. Palasciano, S. Panebianco, H. Park, J. Park, J. E. Parkkila, R. N. Patra, B. Paul, H. Pei, T. Peitzmann, X. Peng, M. Pennisi, L. G. Pereira, D. Peresunko, G. M. Perez, S. Perrin, Y. Pestov, V. Petráček, V. Petrov, M. Petrovici, R. P. Pezzi, S. Piano, M. Pikna, P. Pillot, O. Pinazza, L. Pinsky, C. Pinto, S. Pisano, M. Płoskoń, M. Planinic, F. 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Yin, I.-K. Yoo, J. H. Yoon, S. Yuan, A. Yuncu, V. Zaccolo, C. Zampolli, F. Zanone, N. Zardoshti, A. Zarochentsev, P. Závada, N. Zaviyalov, M. Zhalov, B. Zhang, L. Zhang, M. Zhang, S. Zhang, X. Zhang, Y. Zhang, Z. Zhang, M. Zhao, V. Zherebchevskii, Y. Zhi, D. Zhou, Y. Zhou, J. Zhu, Y. Zhu, S. C. Zugravel, and N. Zurlo
- Subjects
Heavy Ion Experiments ,Jets ,Particle Correlations and Fluctuations ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Abstract The azimuthal anisotropy of particles associated with jets (jet particles) at midrapidity is measured for the first time in p-Pb and Pb-Pb collisions at s NN $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV down to transverse momentum (p T) of 0.5 GeV/c and 2 GeV/c, respectively, with ALICE. The results obtained in p-Pb collisions are based on a novel three-particle correlation technique. The azimuthal anisotropy coefficient v 2 in high-multiplicity p-Pb collisions is positive, with a significance reaching 6.8σ at low p T, and its magnitude is smaller than in semicentral Pb-Pb collisions. In contrast to the measurements in Pb-Pb collisions, the v 2 coefficient is also found independent of p T within uncertainties. Comparisons with the inclusive charged-particle v 2 and with AMPT calculations are discussed. The predictions suggest that parton interactions play an important role in generating a non-zero jet-particle v 2 in p-Pb collisions, even though they overestimate the reported measurement. These observations shed new insights on the understanding of the origin of the collective behaviour of jet particles in small systems such as p-Pb collisions, and provide significant stringent new constraints to models.
- Published
- 2024
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44. The ALICE experiment: a journey through QCD
- Author
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ALICE Collaboration, S. Acharya, D. Adamová, A. Adler, G. Aglieri Rinella, M. Agnello, N. Agrawal, Z. Ahammed, S. Ahmad, S. U. Ahn, I. Ahuja, A. Akindinov, M. Al-Turany, D. Aleksandrov, B. Alessandro, H. M. Alfanda, R. Alfaro Molina, B. Ali, A. Alici, N. Alizadehvandchali, A. Alkin, J. Alme, G. Alocco, T. Alt, I. Altsybeev, J. R. Alvarado, M. N. Anaam, C. Andrei, A. Andronic, V. Anguelov, F. Antinori, P. Antonioli, N. Apadula, L. Aphecetche, H. Appelshäuser, C. Arata, S. Arcelli, M. Aresti, R. Arnaldi, I. C. Arsene, M. Arslandok, A. Augustinus, R. Averbeck, M. D. Azmi, A. Badalà, J. Bae, Y. W. Baek, X. Bai, R. Bailhache, Y. Bailung, R. Bala, A. Balbino, A. Baldisseri, B. Balis, D. Banerjee, Z. Banoo, R. Barbera, F. Barile, L. Barioglio, M. Barlou, G. G. Barnaföldi, L. S. Barnby, V. Barret, L. Barreto, C. Bartels, K. Barth, E. Bartsch, N. Bastid, S. Basu, G. Batigne, D. Battistini, B. Batyunya, D. Bauri, J. L. Bazo Alba, I. G. Bearden, C. Beattie, P. Becht, D. Behera, I. Belikov, A. D. C. Bell Hechavarria, F. Bellini, R. Bellwied, S. Belokurova, V. Belyaev, G. Bencedi, S. Beole, A. Bercuci, Y. Berdnikov, A. Berdnikova, L. Bergmann, M. G. Besoiu, L. Betev, P. P. Bhaduri, A. Bhasin, M. A. Bhat, B. Bhattacharjee, L. Bianchi, N. Bianchi, J. Bielčík, J. Bielčíková, J. Biernat, A. P. Bigot, A. Bilandzic, G. Biro, S. Biswas, N. Bize, J. T. Blair, D. Blau, M. B. Blidaru, N. Bluhme, C. Blume, G. Boca, F. Bock, T. Bodova, A. Bogdanov, S. Boi, J. Bok, L. Boldizsár, A. Bolozdynya, M. Bombara, P. M. Bond, G. Bonomi, H. Borel, A. Borissov, A. G. Borquez Carcamo, H. Bossi, E. Botta, Y. E. M. Bouziani, L. Bratrud, P. Braun-Munzinger, M. Bregant, M. Broz, G. E. Bruno, M. D. Buckland, D. Budnikov, H. Buesching, S. Bufalino, O. Bugnon, P. Buhler, Z. Buthelezi, S. A. Bysiak, M. Cai, H. Caines, A. Caliva, E. Calvo Villar, J. M. M. Camacho, P. Camerini, F. D. M. Canedo, S. L. Cantway, M. Carabas, A. A. Carballo, F. Carnesecchi, R. Caron, L. A. D. Carvalho, J. Castillo Castellanos, A. J. Castro, F. Catalano, C. Ceballos Sanchez, I. Chakaberia, P. Chakraborty, S. Chandra, S. Chapeland, M. Chartier, S. Chattopadhyay, T. Cheng, C. Cheshkov, B. Cheynis, V. Chibante Barroso, D. D. Chinellato, E. S. Chizzali, J. Cho, S. Cho, P. Chochula, P. Christakoglou, C. H. Christensen, P. Christiansen, T. Chujo, M. Ciacco, C. Cicalo, F. Cindolo, M. R. Ciupek, G. Clai, F. Colamaria, J. S. Colburn, D. Colella, M. Colocci, M. Concas, G. Conesa Balbastre, Z. Conesa del Valle, G. Contin, J. G. Contreras, M. L. Coquet, T. M. Cormier, P. Cortese, M. R. Cosentino, F. Costa, S. Costanza, C. Cot, J. Crkovská, P. Crochet, R. Cruz-Torres, E. Cuautle, P. Cui, A. Dainese, F. P. A. Damas, M. C. Danisch, A. Danu, D. Das, P. Das, S. Das, A. R. Dash, S. Dash, A. De Caro, G. de Cataldo, J. de Cuveland, A. De Falco, D. De Gruttola, N. De Marco, C. De Martin, S. De Pasquale, S. Deb, R. J. Debski, K. R. Deja, R. Del Grande, L. Dello Stritto, W. Deng, P. Dhankher, D. Di Bari, A. Di Mauro, B. Diab, R. A. Diaz, T. Dietel, Y. Ding, R. Divià, D. U. Dixit, Ø. Djuvsland, U. Dmitrieva, A. Dobrin, B. Dönigus, J. M. Dubinski, A. Dubla, S. Dudi, P. Dupieux, M. Durkac, N. Dzalaiova, T. M. Eder, R. J. Ehlers, V. N. Eikeland, F. Eisenhut, D. Elia, B. Erazmus, F. Ercolessi, F. Erhardt, M. R. Ersdal, B. Espagnon, G. Eulisse, D. Evans, S. Evdokimov, L. Fabbietti, M. Faggin, J. Faivre, F. Fan, W. Fan, A. Fantoni, M. Fasel, P. Fecchio, A. Feliciello, G. Feofilov, A. Fernández Téllez, L. Ferrandi, M. B. Ferrer, A. Ferrero, C. Ferrero, A. Ferretti, V. J. G. Feuillard, V. Filova, D. Finogeev, F. M. Fionda, F. Flor, A. N. Flores, S. Foertsch, I. Fokin, S. Fokin, E. Fragiacomo, E. Frajna, U. Fuchs, N. Funicello, C. Furget, A. Furs, T. Fusayasu, J. J. Gaardhøje, M. Gagliardi, A. M. Gago, M. Gallio, C. D. Galvan, D. R. Gangadharan, P. Ganoti, C. Garabatos, T. García Chávez, E. Garcia-Solis, K. Garg, C. Gargiulo, K. Garner, P. Gasik, E. F. Gauger, A. Gautam, M. B. Gay Ducati, M. Germain, C. Ghosh, M. Giacalone, P. Giubellino, P. Giubilato, A. M. C. Glaenzer, P. Glässel, E. Glimos, D. J. Q. Goh, V. Gonzalez, L. H. González-Trueba, M. Gorgon, S. Gotovac, V. Grabski, L. K. Graczykowski, E. Grecka, A. Grelli, C. Grigoras, V. Grigoriev, S. Grigoryan, F. Grosa, J. F. Grosse-Oetringhaus, R. Grosso, D. Grund, G. G. Guardiano, R. Guernane, M. Guilbaud, K. Gulbrandsen, T. Gündem, T. Gunji, W. Guo, A. Gupta, R. Gupta, L. Gyulai, M. K. Habib, C. Hadjidakis, F. U. Haider, H. Hamagaki, A. Hamdi, M. Hamid, Y. Han, R. Hannigan, M. R. Haque, J. W. Harris, A. Harton, H. Hassan, D. Hatzifotiadou, P. Hauer, L. B. Havener, S. T. Heckel, E. Hellbär, H. Helstrup, M. Hemmer, T. Herman, G. Herrera Corral, F. Herrmann, S. Herrmann, K. F. Hetland, B. Heybeck, H. Hillemanns, C. Hills, B. Hippolyte, B. Hofman, B. Hohlweger, G. H. Hong, M. Horst, A. Horzyk, R. Hosokawa, Y. Hou, P. Hristov, C. Hughes, P. Huhn, L. M. Huhta, T. J. Humanic, A. Hutson, D. Hutter, J. P. Iddon, R. Ilkaev, H. Ilyas, M. Inaba, G. M. Innocenti, M. Ippolitov, A. Isakov, T. Isidori, M. S. Islam, M. Ivanov, V. Ivanov, M. Jablonski, B. Jacak, N. Jacazio, P. M. Jacobs, S. Jadlovska, J. Jadlovsky, S. Jaelani, L. Jaffe, C. Jahnke, M. J. Jakubowska, M. A. Janik, T. Janson, M. Jercic, S. Jia, A. A. P. Jimenez, F. Jonas, J. M. Jowett, J. Jung, M. Jung, A. Junique, A. Jusko, J. Kaewjai, P. Kalinak, A. S. Kalteyer, A. Kalweit, V. Kaplin, A. Karasu Uysal, D. Karatovic, O. Karavichev, T. Karavicheva, P. Karczmarczyk, E. Karpechev, M. J. Karwowska, U. Kebschull, R. Keidel, D. L. D. Keijdener, M. Keil, B. Ketzer, A. M. Khan, S. Khan, A. Khanzadeev, Y. Kharlov, A. Khatun, A. Khuntia, M. B. Kidson, B. Kileng, B. Kim, C. Kim, D. J. Kim, E. J. Kim, J. Kim, J. S. Kim, M. Kim, S. Kim, T. Kim, K. Kimura, S. Kirsch, I. Kisel, S. Kiselev, A. Kisiel, J. P. Kitowski, J. L. Klay, J. Klein, S. Klein, C. Klein-Bösing, M. Kleiner, T. Klemenz, A. Kluge, A. G. Knospe, C. Kobdaj, T. Kollegger, A. Kondratyev, N. Kondratyeva, E. Kondratyuk, J. 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Rui, B. Rumyantsev, P. G. Russek, R. Russo, A. Rustamov, E. Ryabinkin, Y. Ryabov, A. Rybicki, H. Rytkonen, W. Rzesa, O. A. M. Saarimaki, R. Sadek, S. Sadhu, S. Sadovsky, J. Saetre, K. Šafařík, S. K. Saha, S. Saha, B. Sahoo, R. Sahoo, S. Sahoo, D. Sahu, P. K. Sahu, J. Saini, K. Sajdakova, S. Sakai, M. P. Salvan, S. Sambyal, I. Sanna, T. B. Saramela, D. Sarkar, N. Sarkar, P. Sarma, V. Sarritzu, V. M. Sarti, M. H. P. Sas, J. Schambach, H. S. Scheid, C. Schiaua, R. Schicker, A. Schmah, C. Schmidt, H. R. Schmidt, M. O. Schmidt, M. Schmidt, N. V. Schmidt, A. R. Schmier, R. Schotter, A. Schröter, J. Schukraft, K. Schwarz, K. Schweda, G. Scioli, E. Scomparin, J. E. Seger, Y. Sekiguchi, D. Sekihata, I. Selyuzhenkov, S. Senyukov, J. J. Seo, D. Serebryakov, L. Šerkšnytė, A. Sevcenco, T. J. Shaba, A. Shabetai, R. Shahoyan, A. Shangaraev, A. Sharma, B. Sharma, D. Sharma, H. Sharma, M. Sharma, S. Sharma, U. Sharma, A. Shatat, O. Sheibani, K. Shigaki, M. Shimomura, J. Shin, S. Shirinkin, Q. Shou, Y. Sibiriak, S. Siddhanta, T. Siemiarczuk, T. F. Silva, D. Silvermyr, T. Simantathammakul, R. Simeonov, B. Singh, R. Singh, S. Singh, V. K. Singh, V. Singhal, T. Sinha, B. Sitar, M. Sitta, T. B. Skaali, G. Skorodumovs, M. Slupecki, N. Smirnov, R. J. M. Snellings, E. H. Solheim, J. Song, A. Songmoolnak, F. Soramel, S. P. Sorensen, R. Spijkers, I. Sputowska, J. Staa, J. Stachel, I. Stan, P. J. Steffanic, S. F. Stiefelmaier, D. Stocco, I. Storehaug, P. Stratmann, S. Strazzi, C. P. Stylianidis, A. A. P. Suaide, C. Suire, M. Sukhanov, M. Suljic, R. Sultanov, V. Sumberia, S. Sumowidagdo, S. Swain, I. Szarka, S. F. Taghavi, G. Taillepied, J. Takahashi, G. J. Tambave, S. Tang, Z. Tang, J. D. Tapia Takaki, N. Tapus, L. A. Tarasovicova, M. G. Tarzila, G. F. Tassielli, A. Tauro, A. Tavira García, G. Tejeda Muñoz, A. Telesca, L. Terlizzi, C. Terrevoli, G. Tersimonov, S. Thakur, D. Thomas, A. Tikhonov, A. R. Timmins, M. Tkacik, T. Tkacik, A. Toia, R. Tokumoto, N. Topilskaya, M. Toppi, F. Torales-Acosta, T. Tork, A. G. Torres Ramos, A. Trifiró, A. S. Triolo, S. Tripathy, T. Tripathy, S. Trogolo, V. Trubnikov, W. H. Trzaska, T. P. Trzcinski, A. Tumkin, R. Turrisi, T. S. Tveter, K. Ullaland, B. Ulukutlu, A. Uras, M. Urioni, G. L. Usai, M. Vala, N. Valle, L. V. R. van Doremalen, C. Van Hulse, M. van Leeuwen, C. A. van Veen, R. J. G. van Weelden, P. Vande Vyvre, D. Varga, Z. Varga, M. Vasileiou, A. Vasiliev, O. Vázquez Doce, O. Vazquez Rueda, V. Vechernin, E. Vercellin, S. Vergara Limón, L. Vermunt, R. Vértesi, M. Verweij, L. Vickovic, Z. Vilakazi, O. Villalobos Baillie, G. Vino, A. Vinogradov, T. Virgili, V. Vislavicius, A. Vodopyanov, B. Volkel, M. A. Völkl, K. Voloshin, S. A. Voloshin, G. Volpe, B. von Haller, I. Vorobyev, N. Vozniuk, J. Vrláková, C. Wang, D. Wang, Y. Wang, M. Weber, A. Wegrzynek, F. T. Weiglhofer, S. C. Wenzel, J. P. Wessels, J. Wiechula, J. Wikne, G. Wilk, J. Wilkinson, G. A. Willems, B. Windelband, M. Winn, J. R. Wright, W. Wu, Y. Wu, R. Xu, A. 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Astrophysics ,QB460-466 ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Abstract The ALICE experiment was proposed in 1993, to study strongly-interacting matter at extreme energy densities and temperatures. This proposal entailed a comprehensive investigation of nuclear collisions at the LHC. Its physics programme initially focused on the determination of the properties of the quark–gluon plasma (QGP), a deconfined state of quarks and gluons, created in such collisions. The ALICE physics programme has been extended to cover a broader ensemble of observables related to Quantum Chromodynamics (QCD), the theory of strong interactions. The experiment has studied Pb–Pb, Xe–Xe, p–Pb and pp collisions in the multi-TeV centre of mass energy range, during the Run 1–2 data-taking periods at the LHC (2009–2018). The aim of this review is to summarise the key ALICE physics results in this endeavor, and to discuss their implications on the current understanding of the macroscopic and microscopic properties of strongly-interacting matter at the highest temperatures reached in the laboratory. It will review the latest findings on the properties of the QGP created by heavy-ion collisions at LHC energies, and describe the surprising QGP-like effects in pp and p–Pb collisions. Measurements of few-body QCD interactions, and their impact in unraveling the structure of hadrons and hadronic interactions, will be discussed. ALICE results relevant for physics topics outside the realm of QCD will also be touched upon. Finally, prospects for future measurements with the ALICE detector in the context of its planned upgrades will also be briefly described.
- Published
- 2024
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45. Azimuthal anisotropy of jet particles in p-Pb and Pb-Pb collisions at sNN = 5.02 TeV
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Acharya, S., Adamová, D., Adler, A., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, S., Ahn, S. U., Ahuja, I., Akindinov, A., Al-Turany, M., Aleksandrov, D., Alessandro, B., Alfanda, H. M., Alfaro Molina, R., Ali, B., Alici, A., Alizadehvandchali, N., Alkin, A., Alme, J., Alocco, G., Alt, T., Altsybeev, I., Alvarado, J. R., Anaam, M. N., Andrei, C., Andronic, A., Anguelov, V., Antinori, F., Antonioli, P., Apadula, N., Aphecetche, L., Appelshäuser, H., Arata, C., Arcelli, S., Aresti, M., Arnaldi, R., Arneiro, J. G. M. C. A., Arsene, I. C., Arslandok, M., Augustinus, A., Averbeck, R., Azmi, M. D., Badalà, A., Bae, J., Baek, Y. W., Bai, X., Bailhache, R., Bailung, Y., Balbino, A., Baldisseri, A., Balis, B., Banerjee, D., Banoo, Z., Barbera, R., Barile, F., Barioglio, L., Barlou, M., Barnaföldi, G. G., Barnby, L. S., Barret, V., Barreto, L., Bartels, C., Barth, K., Bartsch, E., Bastid, N., Basu, S., Batigne, G., Battistini, D., Batyunya, B., Bauri, D., Bazo Alba, J. L., Bearden, I. G., Beattie, C., Becht, P., Behera, D., Belikov, I., Bell Hechavarria, A. D. C., Bellini, F., Bellwied, R., Belokurova, S., Belyaev, V., Bencedi, G., Beole, S., Berdnikov, Y., Berdnikova, A., Bergmann, L., Besoiu, M. G., Betev, L., Bhaduri, P. P., Bhasin, A., Bhat, M. A., Bhattacharjee, B., Bianchi, L., Bianchi, N., Bielčík, J., Bielčíková, J., Biernat, J., Bigot, A. P., Bilandzic, A., Biro, G., Biswas, S., Bize, N., Blair, J. T., Blau, D., Blidaru, M. B., Bluhme, N., Blume, C., Boca, G., Bock, F., Bodova, T., Bogdanov, A., Boi, S., Bok, J., Boldizsár, L., Bombara, M., Bond, P. M., Bonomi, G., Borel, H., Borissov, A., Borquez Carcamo, A. G., Bossi, H., Botta, E., Bouziani, Y. E. M., Bratrud, L., Braun-Munzinger, P., Bregant, M., Broz, M., Bruno, G. E., Buckland, M. D., Budnikov, D., Buesching, H., Bufalino, S., Bugnon, O., Buhler, P., Buthelezi, Z., Bysiak, S. A., Cai, M., Caines, H., Caliva, A., Calvo Villar, E., Camacho, J. M. M., Camerini, P., Canedo, F. D. 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M., Kryshen, E., Kučera, V., Kuhn, C., Kuijer, P. G., Kumaoka, T., Kumar, D., Kumar, L., Kumar, N., Kumar, S., Kundu, S., Kurashvili, P., Kurepin, A., Kurepin, A. B., Kuryakin, A., Kushpil, S., Kvapil, J., Kweon, M. J., Kwon, J. Y., Kwon, Y., La Pointe, S. L., La Rocca, P., Lai, Y. S., Lakrathok, A., Lamanna, M., Langoy, R., Larionov, P., Laudi, E., Lautner, L., Lavicka, R., Lazareva, T., Lea, R., Lee, H., Legras, G., Lehrbach, J., Lelek, T. M., Lemmon, R. C., León Monzón, I., Lesch, M. M., Lesser, E. D., Lettrich, M., Lévai, P., Li, X., Li, X. L., Lien, J., Lietava, R., Likmeta, I., Lim, B., Lim, S. H., Lindenstruth, V., Lindner, A., Lippmann, C., Liu, A., Liu, D. H., Liu, J., Lofnes, I. M., Loizides, C., Lokos, S., Lömker, J., Loncar, P., Lopez, J. A., Lopez, X., López Torres, E., Lu, P., Luhder, J. R., Lunardon, M., Luparello, G., Ma, Y. G., Maevskaya, A., Mager, M., Mahmoud, T., Maire, A., Makariev, M. V., Malaev, M., Malfattore, G., Malik, N. M., Malik, Q. W., Malik, S. K., Malinina, L., Mal’Kevich, D., Mallick, D., Mallick, N., Mandaglio, G., Mandal, S. K., Manko, V., Manso, F., Manzari, V., Mao, Y., Margagliotti, G. V., Margotti, A., Marín, A., Markert, C., Martinengo, P., Martinez, J. L., Martínez, M. I., Martínez García, G., Masciocchi, S., Masera, M., Masoni, A., Massacrier, L., Mastroserio, A., Matonoha, O., Matuoka, P. F. T., Matyja, A., Mayer, C., Mazuecos, A. L., Mazzaschi, F., Mazzilli, M., Mdhluli, J. E., Mechler, A. F., Melikyan, Y., Menchaca-Rocha, A., Meninno, E., Menon, A. S., Meres, M., Mhlanga, S., Miake, Y., Micheletti, L., Migliorin, L. C., Mihaylov, D. L., Mikhaylov, K., Mishra, A. N., Miśkowiec, D., Modak, A., Mohanty, A. P., Mohanty, B., Mohisin Khan, M., Molander, M. A., Moravcova, Z., Mordasini, C., Moreira De Godoy, D. A., Morozov, I., Morsch, A., Mrnjavac, T., Muccifora, V., Muhuri, S., Mulligan, J. D., Mulliri, A., Munhoz, M. G., Munzer, R. H., Murakami, H., Murray, S., Musa, L., Musinsky, J., Myrcha, J. W., Naik, B., Nambrath, A. I., Nandi, B. K., Nania, R., Nappi, E., Nassirpour, A. F., Nath, A., Nattrass, C., Naydenov, M. N., Neagu, A., Negru, A., Nellen, L., Nesbo, S. V., Neskovic, G., Nesterov, D., Nielsen, B. S., Nielsen, E. G., Nikolaev, S., Nikulin, S., Nikulin, V., Noferini, F., Noh, S., Nomokonov, P., Norman, J., Novitzky, N., Nowakowski, P., Nyanin, A., Nystrand, J., Ogino, M., Ohlson, A., Okorokov, V. A., Oleniacz, J., Oliveira Da Silva, A. C., Oliver, M. H., Onnerstad, A., Oppedisano, C., Ortiz Velasquez, A., Otwinowski, J., Oya, M., Oyama, K., Pachmayer, Y., Padhan, S., Pagano, D., Paić, G., Paisano-Guzmán, S., Palasciano, A., Panebianco, S., Park, H., Park, H., Park, J., Parkkila, J. E., Patra, R. N., Paul, B., Pei, H., Peitzmann, T., Peng, X., Pennisi, M., Pereira, L. G., Peresunko, D., Perez, G. M., Perrin, S., Pestov, Y., Petráček, V., Petrov, V., Petrovici, M., Pezzi, R. 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S., Romanenko, G., Ronchetti, F., Rosano, A., Rosas, E. D., Roslon, K., Rossi, A., Roy, A., Roy, S., Rubini, N., Ruggiano, D., Rui, R., Rumyantsev, B., Russek, P. G., Russo, R., Rustamov, A., Ryabinkin, E., Ryabov, Y., Rybicki, A., Rytkonen, H., Rzesa, W., Saarimaki, O. A. M., Sadek, R., Sadhu, S., Sadovsky, S., Saetre, J., Šafařík, K., Saha, S. K., Saha, S., Sahoo, B., Sahoo, R., Sahoo, S., Sahu, D., Sahu, P. K., Saini, J., Sajdakova, K., Sakai, S., Salvan, M. P., Sambyal, S., Sanna, I., Saramela, T. B., Sarkar, D., Sarkar, N., Sarma, P., Sarritzu, V., Sarti, V. M., Sas, M. H. P., Schambach, J., Scheid, H. S., Schiaua, C., Schicker, R., Schmah, A., Schmidt, C., Schmidt, H. R., Schmidt, M. O., Schmidt, M., Schmidt, N. V., Schmier, A. R., Schotter, R., Schröter, A., Schukraft, J., Schwarz, K., Schweda, K., Scioli, G., Scomparin, E., Seger, J. E., Sekiguchi, Y., Sekihata, D., Selyuzhenkov, I., Senyukov, S., Seo, J. J., Serebryakov, D., Šerkšnytė, L., Sevcenco, A., Shaba, T. J., Shabetai, A., Shahoyan, R., Shangaraev, A., Sharma, A., Sharma, B., Sharma, D., Sharma, H., Sharma, M., Sharma, S., Sharma, S., Sharma, U., Shatat, A., Sheibani, O., Shigaki, K., Shimomura, M., Shin, J., Shirinkin, S., Shou, Q., Sibiriak, Y., Siddhanta, S., Siemiarczuk, T., Silva, T. F., Silvermyr, D., Simantathammakul, T., Simeonov, R., Singh, B., Singh, B., Singh, R., Singh, R., Singh, R., Singh, S., Singh, V. K., Singhal, V., Sinha, T., Sitar, B., Sitta, M., Skaali, T. B., Skorodumovs, G., Slupecki, M., Smirnov, N., Snellings, R. J. M., Solheim, E. H., Song, J., Songmoolnak, A., Soramel, F., Spijkers, R., Sputowska, I., Staa, J., Stachel, J., Stan, I., Steffanic, P. J., Stiefelmaier, S. F., Stocco, D., Storehaug, I., Stratmann, P., Strazzi, S., Stylianidis, C. P., Suaide, A. A. P., Suire, C., Sukhanov, M., Suljic, M., Sultanov, R., Sumberia, V., Sumowidagdo, S., Swain, S., Szarka, I., Szymkowski, M., Taghavi, S. F., Taillepied, G., Takahashi, J., Tambave, G. J., Tang, S., Tang, Z., Tapia Takaki, J. D., Tapus, N., Tarasovicova, L. A., Tarzila, M. G., Tassielli, G. F., Tauro, A., Tejeda Muñoz, G., Telesca, A., Terlizzi, L., Terrevoli, C., Tersimonov, G., Thakur, S., Thomas, D., Tikhonov, A., Timmins, A. R., Tkacik, M., Tkacik, T., Toia, A., Tokumoto, R., Topilskaya, N., Toppi, M., Torales-Acosta, F., Tork, T., Torres Ramos, A. G., Trifiró, A., Triolo, A. S., Tripathy, S., Tripathy, T., Trogolo, S., Trubnikov, V., Trzaska, W. H., Trzcinski, T. P., Tumkin, A., Turrisi, R., Tveter, T. S., Ullaland, K., Ulukutlu, B., Uras, A., Urioni, M., Usai, G. L., Vala, M., Valle, N., van Doremalen, L. V. R., Van Hulse, C., van Leeuwen, M., van Veen, C. A., van Weelden, R. J. G., Vande Vyvre, P., Varga, D., Varga, Z., Vasileiou, M., Vasiliev, A., Vázquez Doce, O., Vazquez Rueda, O., Vechernin, V., Vercellin, E., Vergara Limón, S., Vermunt, L., Vértesi, R., Verweij, M., Vickovic, L., Vilakazi, Z., Villalobos Baillie, O., Villani, A., Vino, G., Vinogradov, A., Virgili, T., Virta, M. M. O., Vislavicius, V., Vodopyanov, A., Volkel, B., Völkl, M. A., Voloshin, K., Voloshin, S. A., Volpe, G., von Haller, B., Vorobyev, I., Vozniuk, N., Vrláková, J., Wang, C., Wang, D., Wang, Y., Wegrzynek, A., Weiglhofer, F. T., Wenzel, S. C., Wessels, J. P., Wiechula, J., Wikne, J., Wilk, G., Wilkinson, J., Willems, G. A., Windelband, B., Winn, M., Wright, J. R., Wu, W., Wu, Y., Xu, R., Yadav, A., Yadav, A. K., Yalcin, S., Yamaguchi, Y., Yang, S., Yano, S., Yin, Z., Yoo, I.-K., Yoon, J. H., Yuan, S., Yuncu, A., Zaccolo, V., Zampolli, C., Zanone, F., Zardoshti, N., Zarochentsev, A., Závada, P., Zaviyalov, N., Zhalov, M., Zhang, B., Zhang, L., Zhang, M., Zhang, S., Zhang, X., Zhang, Y., Zhang, Z., Zhao, M., Zherebchevskii, V., Zhi, Y., Zhou, D., Zhou, Y., Zhu, J., Zhu, Y., Zugravel, S. C., and Zurlo, N.
- Published
- 2024
- Full Text
- View/download PDF
46. Voltage Activated Parametric Entangling Gates on Gatemons
- Author
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Chen, Yinqi, Nesterov, Konstantin N., Churchill, Hugh, Shabani, Javad, Manucharyan, Vladimir E., and Vavilov, Maxim G.
- Subjects
Quantum Physics ,Condensed Matter - Mesoscale and Nanoscale Physics - Abstract
We describe the generation of entangling gates on superconductor-semiconductor hybrid qubits by ac voltage modulation of the Josephson energy. Our numerical simulations demonstrate that the unitary error can be below $10^{-5}$ in a variety of 75-ns-long two-qubit gates (CZ, $i$SWAP, and $\sqrt{i\mathrm{SWAP}}$) implemented using parametric resonance. We analyze the conditional ZZ phase and demonstrate that the CZ gate needs no further phase correction steps, while the ZZ phase error in SWAP-type gates can be compensated by choosing pulse parameters. With decoherence considered, we estimate that qubit relaxation time needs to exceed $70\mu\mathrm{s}$ to achieve the 99.9% fidelity threshold., Comment: 15 pages, 10 figures
- Published
- 2023
47. Discovering Hierarchical Process Models: an Approach Based on Events Clustering
- Author
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Begicheva, Antonina K., Lomazova, Irina A., and Nesterov, Roman A.
- Subjects
Computer Science - Artificial Intelligence - Abstract
Process mining is a field of computer science that deals with discovery and analysis of process models based on automatically generated event logs. Currently, many companies use this technology for optimization and improving their processes. However, a discovered process model may be too detailed, sophisticated and difficult for experts to understand. In this paper, we consider the problem of discovering a hierarchical business process model from a low-level event log, i.e., the problem of automatic synthesis of more readable and understandable process models based on information stored in event logs of information systems. Discovery of better structured and more readable process models is intensively studied in the frame of process mining research from different perspectives. In this paper, we present an algorithm for discovering hierarchical process models represented as two-level workflow nets. The algorithm is based on predefined event ilustering so that the cluster defines a sub-process corresponding to a high-level transition at the top level of the net. Unlike existing solutions, our algorithm does not impose restrictions on the process control flow and allows for concurrency and iteration.
- Published
- 2023
48. Enumerative mirror symmetry for moduli spaces of Higgs bundles and S-duality
- Author
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Nesterov, Denis
- Subjects
Mathematics - Algebraic Geometry ,High Energy Physics - Theory - Abstract
We derive conjectures, called genus 1 Enumerative mirror symmetry for moduli spaces of Higgs bundles, which relate curve-counting invariants of moduli spaces of Higgs $\mathrm{SL}_r$-bundles to curve-counting invariants of moduli spaces of Higgs $\mathrm{PGL}_r$-bundles. This contrasts with Enumerative mirror symmetry for Calabi-Yau 3-folds which relates curve-counting invariants to periods. We also provide extensive mathematical evidence for these conjectures. The conjectures are obtained with the help of the theory of quasimaps to moduli spaces of sheaves, Tanaka-Thomas's construction of Vafa-Witten theory, Jiang-Kool's enumerative S-duality of Vafa-Witten invariants and Manschot-Moore's calculations. We use the latter together with some basic computations to give a complete list of conjectural expressions for genus 1 quasimap invariants for all prime ranks. They have many interesting properties, among which is quantum $\chi$-independence. The wall-crossing to Gromov-Witten theory is also thoroughly discussed., Comment: 81 pages, 3 figures. conjectures for higher ranks are added; chi-independence is observed; more details on the quasimap wall-crossing; references to the sequel paper with more computations; some typos and inaccuracies are corrected
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- 2023
49. Gradient Methods for Stochastic Optimization in Relative Scale
- Author
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Nesterov, Yurii and Rodomanov, Anton
- Subjects
Mathematics - Optimization and Control - Abstract
We propose a new concept of a relatively inexact stochastic subgradient and present novel first-order methods that can use such objects to approximately solve convex optimization problems in relative scale. An important example where relatively inexact subgradients naturally arise is given by the Power or Lanczos algorithms for computing an approximate leading eigenvector of a symmetric positive semidefinite matrix. Using these algorithms as subroutines in our methods, we get new optimization schemes that can provably solve certain large-scale Semidefinite Programming problems with relative accuracy guarantees by using only matrix-vector products.
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- 2023
50. Elastic scatering cross-sections obtained on the basis of the potential of the modified Thomas-Fermi method and taking the core into account
- Author
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Nesterov, V. A., Davydovska, O. I., and Denisov, V. Yu.
- Subjects
Nuclear Theory - Abstract
Nucleon density distributions and nucleus-nucleus interaction potentials for the reactions $^{16}$O+$^{40}$Ca, $^{16}$O+$^{56}$Fe and $^{16}$O+$^{90}$Zr have been calculated in the framework of the modified Thomas-Fermi method and considering all terms up to the second order in $\hbar$ in the quasi-classical expansion of the kinetic energy. Skyrme forces dependent on the nucleon density are used as the nucleon-nucleon interaction. A parametrization of the nucleus-nucleus interaction potential, which well describes the potential value calculated within the modified Thomas-Fermi approach with density-dependent Skyrme forces, is found. On the basis of the obtained potentials, the cross-sections of elastic scattering are calculated in a good agreement with experimental data., Comment: 8 pages, 5 figures
- Published
- 2023
- Full Text
- View/download PDF
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