Dear colleagues!
We would like to remind you about the JINR Seminar scheduled for *12 January* (Wednesday) at *16:00* (GMT+3) .
The seminar will be *fully online* via Zoom.
Speaker: *Prof. Or Hen* (Massachusetts Institute of Technology, Cambridge, MA USA)
Title: *QCD Research at the U.S. Electron-Ion Collider*
Abstract:
The Electron Ion Collider (EIC) is a new experimental complex, that is currently being built at Brookhaven National Lab in the U.S. with first operations planed for 2031. The EIC will collide intense, high-energy, polarized beam of electrons and hadrons at center-of-mass energy of 40 – 120 GeV to study the fundamental structure of subatomic matter. For example, the EIC will advance our understand the dynamical generation of hadron mass and spin from quark-gluon interactions in QCD, the three-dimensional structure of nucleons and nuclei, and the emergent properties of dense systems of gluons and more.
The EIC development and construction is a new international project on the first stages of its realization. It provides both new opportunities for the precise research of nuclei and proton, as well as the development of new accelerator and detector technologies using techniques from big data analysis and using pioneer ML and AI features. The project is actively developing and has a wide international support and recognition.
This talk will present an overview of the EIC, its physics program, and the proposed ECCE detector.
Seminar Indico page:
https://indico.jinr.ru/event/2729/
Zoom meeting room:
https://zoom.us/j/98548743246?pwd=cHUrWU5tb2xHVnhNM0pFZGFWaXdZUT09
Meeting ID: 985 4874 3246
Password: 163600
With best regards,
Alexander Bednyakov
P.S. You can contact me to unsubscribe from the JINR Seminar mailing list. The JINR employees can manage their subscriptions via https://acc.jinr.ru
- N. Kutovskiy
Cloud infrastructures of JINR and its Member States’ organizations
The current state of affairs on the JINR cloud infrastructure and distributed platform based on the resources of the organizations of the Institute’s Member States is presented. A description of the architectures of both platforms, technical characteristics, tasks for which their resources are used, as well as development plans, are provided.
- V. Svozilík
Data analysis – Machine Learning in air pollution research
Vast area air pollution research is intensive on financial, human and computational resources. Therefore, the trend to find alternative approaches for studying air pollution can be observed.
Land Use Regression (LUR) is an alternative modelling methodology based on the assumption that concentration at a particular location is determined by factors (land use, pollution sources) that positively or negatively influence air pollution. The relation between these factors and air pollution concentration can be represented via a regression model. The regression model was constructed using an Artificial Neural Network (ANN), which is able to capture nonlinear phenomena. The results showed that ANN-assisted LUR described more variability of air pollution than standard LUR models.
The second experiment focuses on the improvement of air pollution monitoring data from a low-cost sensor network. Based on the measurement of low-cost sensors carried out with a standard air pollution monitoring station simultaneously, the ANN is able to improve measurements of the whole sensor network.
Информация о семинаре и ссылка на подключение размещены в Indico:
https://indico-hlit.jinr.ru/event/278/
April 20, Wed, 10 a.m.
*I.V. Bobyleva *
*A method for pairwise processing of elements in data arrays for
many-task computing in a hybrid cloud (based on the PhD thesis) *
The dissertation is devoted to the development of a method for
organizing efficient computing using hybrid cloud systems in data
processing problems. The method is based on the joint application of
Cole’s algorithmic skeletons and a variant of the Hewitt actor model to
describe many-task computations. The proposed method is investigated by
the example of algorithms for pairwise processing of data arrays
according to the principle of a round robin tournament. Computational
experiments demonstrate the effectiveness of software implementations of
these algorithms on various types of modern computer architectures
representing hybrid cloud resources.
*Friday, 13 May 2022, 15.00, **MLIT Conference Hall*
*Online seminar via Webex*
*Mihai-Tiberiu Dima, Maria Dima*
*Flash algorithms in polymorphic C++*
NICA – trigger – flash algorithms – polymorphic C++. What do these
items have in common?
The talk will consider the case for an LVL2-like trigger for the vertex
detector (ITS) at the MPD-II upgrade. Such software needs to find
(helix) tracks fast and vertex them to select events with secondary and
tertiary vertices, characteristic of charm- and hyper-nuclei physics.
This is part of a larger effort of building a Scientific Software
Library available to all domains, which started with neutron-noise
analyses at IBR-2M (FoxLima FFT, Basic Elements Method, Clustering,
etc.). The C++ design norms (low inheritance / virtualization) and
Math-on-Paper concept (polymorphic code) are reviewed and explained on
the CPX, VEC and MTX classes, especially created for building this
trigger software.
We believe our (quasi)-polymorphic solution is more realistic and has
better CPU performance than C++_17’s std::variant and std::visit.
*Thursday, 2 June 2022, 14.00, MLIT Conference Hall*
*Online seminar via Zoom*
*Stepanov Evgeniy*
(Faculty of Computational Mathematics and Cybernetics
Lomonosov Moscow State University)
*Research of multipath routing methods to ensure *
*the quality of the network service*
(based on the PhD thesis)
The thesis research is devoted to the problem of the comparative
analysis of multipath transport protocols. The report will consider the
results of the study of two main classes of multipath protocols: static
and dynamic. The MPTCP protocol, in which the subflow number is set at
once for the entire life of the transport connection, is chosen as a
representative of the static class. The FDMP protocol (proposed in the
thesis), in which the subflow number depends on the current transport
connection throughput and the application requirements, is considered as
a representative of the dynamic class. The research results have shown
that the FDMP protocol allows increasing the efficiency of using network
resources in at least 95% of cases, and have enabled to determine the
scope of the static and dynamic classes of multipath protocols.
Tuesday, 2 August 2022, 11.00, *Room 310
Online seminar via Zoom
*1. Tukhliev Z.K.
*Method for simulating thermal processes in metals irradiated by
particles on the basis of the development and combination of thermal
spike and molecular dynamics models*
The talk provides an overview of the research performed using the
molecular dynamics method and in combination with the thermal spike
model over the past three years. The report has the following parts: 1)
Numerical methods: algorithm optimization, high-order schemes for
systems with a small number of particles, use of high-performance
systems. 2) Irradiation of materials with high-energy heavy ions. The
applicability and modification of the molecular dynamics method in
combination with the thermal spike model when irradiating materials with
high-energy heavy ions are discussed. 3) Irradiation with nanoclusters.
Wave effects of heat conduction, formation of shock waves and their
influence on structural changes.
*2. Ivancova O.V.
*Analysis of quantum simulators and quantum algorithm modeling on the
“Govorun” supercomputer*
After decades of development, quantum computing has made tangible
progress in hardware and algorithms. However, modern quantum devices are
seriously limited in the number of qubits, the circuit depth and, at the
same time, have strong noise processes that make it difficult to attain
a correct result. Therefore, the direction related to software quantum
simulators for calculations on classical computers is of particular
interest.
The talk provides a comparison of several quantum simulators using the
classical architecture on the example of modeling three quantum
algorithms and also presents the results of the effective use of a
supercomputer to model quantum circuits on the CPU and GPU.
**
Tuesday, 2 August 2022, 11.00, *Room 310
Online seminar via Zoom
*1. Tukhliev **Z**.**K**.*
*Method for simulating thermal processes in metals irradiated by
particles on the basis of the development and combination of thermal
spike and molecular dynamics models*
The talk provides an overview of the research performed using the
molecular dynamics method and in combination with the thermal spike
model over the past three years. The report has the following parts: 1)
Numerical methods: algorithm optimization, high-order schemes for
systems with a small number of particles, use of high-performance
systems. 2) Irradiation of materials with high-energy heavy ions. The
applicability and modification of the molecular dynamics method in
combination with the thermal spike model when irradiating materials with
high-energy heavy ions are discussed. 3) Irradiation with nanoclusters.
Wave effects of heat conduction, formation of shock waves and their
influence on structural changes.
*2. Ivancova****O**.**V**. *
*Analysis of quantum simulators and quantum algorithm modeling on the
“Govorun” supercomputer*
After decades of development, quantum computing has made tangible
progress in hardware and algorithms. However, modern quantum devices are
seriously limited in the number of qubits, the circuit depth and, at the
same time, have strong noise processes that make it difficult to attain
a correct result. Therefore, the direction related to software quantum
simulators for calculations on classical computers is of particular
interest.
The talk provides a comparison of several quantum simulators using the
classical architecture on the example of modeling three quantum
algorithms and also presents the results of the effective use of a
supercomputer to model quantum circuits on the CPU and GPU.
*Monday, 3 October 2022, 11.00, **Room 310*
*Gohar Tsakanova*
Head of the Laboratory of Experimental Biology,
Leading Researcher
CANDLE: Synchrotron Research Institute, Yerevan, Armenia
*Biomedical application of technologies*
*based on an ultrashort laser*
*Meeting of Working Group*
*on Scientific Program *
*of FLNP New Neutron Source*
*October 18, 2022 (Tuesday) at 11:00 ***
*FLNP Conference Hall (3rd floor)***
*Neutron diffraction in *
*condensed matter research***
*V. A. Turchenko*
The modern level of development of neutron diffractometers makes it
possible to successfully use the unique properties of neutrons to study
the crystal and magnetic structure of bulk materials, determine the
position of light atoms in the presence of heavy ones, as well as to
study structures containing elements with similar atomic numbers. The
neutron diffraction method is indispensable for conducting comprehensive
research in the field of condensed matter physics, biology, chemistry
and materials science. It is used for a detailed study of magnetic
ordering in crystals, for determining the magnitude and directions of
magnetic moments for specific ions, and also allows us to establish the
relationship of structural features of materials depending on
environmental conditions (temperature, pressure, magnetic and electric
fields). The development of a new high-flux pulsed neutron source, the
new-generation reactor NEPTUN, will contribute to further expanding the
possibilities of neutron diffraction.
*Wednesday, **9**November 2022, 11:00, **MLIT Conference Hall*
*Online seminar via Webinar*
<https://events.webinar.ru/28441625/1321187367>
*Simulation of the ocean remote sensing process*
*A. A. Sushchenko*
Department of Mathematical and Computer Modeling
Institute of Mathematics and Computer Technologies
Far Eastern Federal University
Theoretical results on the correctness of initial-boundary value
problems for the radiative transfer equation with generalized
conjugation conditions at the media interfaces are obtained. Theorems on
the existence, uniqueness, and stabilization of the solution of the
initial-boundary value problem with generalized conjugation conditions
at the interface in bounded and unbounded media are proved. Methods of
the theory of strongly continuous one-parameter semigroups of linear
operators in Banach spaces and general theorems of functional analysis
were used. A new model of pulsed sounding of the seabed with a side-scan
sonar is constructed. Inverse problems, which consist in determining the
bottom scattering coefficient and a function describing small deviations
of the bottom surface from an average level, are solved. In the study of
inverse problems, elements of the theory of deferential and integral
equations were used. The software has been developed, with the help of
which the testing of algorithms for filtering volumetric scattering in
the ocean was carried out on real data.
https://indico-hlit.jinr.ru/event/331
Dear colleagues!
We kindly invite you to the JINR Institutional Seminar, which is
scheduled for *December 1* (Thursday) at *11:00* (Moscow time, GMT+3).
The seminar will be *fully online* via Zoom.
Speaker: *Prof. Lokesh Kumar* (Panjab University, Chandigarh, India)
Title: *Experimental Results from the STAR Experiment at Relativistic
Heavy Ion Collider*
Abstract:
The STAR experiment at Brookhaven National Laboratory was built to study
the properties of Quark Gluon Plasma (QGP), a deconfined state of quarks
and gluons, created in the relativistic nuclear collisions. Experimental
study of these collisions has revealed the strongly coupled nature of
QGP having low value of viscosity over entropy ratio and high vorticity.
The investigation of Quantum chromodynamics (QCD) phase diagram is one
of the primary goals of the Beam Energy Scan (BES) program at RHIC.
These include the search for the location of QCD critical point and the
first order phase transition between QGP and hadron gas. The BES phase-I
was completed during 2010-2014 with the collection of data at
center-of-mass energies covering 7.7, 11.5, 14.5, 19.6, 27, and 39 GeV
giving many interesting results. In BES phase-II, the high statistics
data was collected for low energies during 2018-2021. I will discuss the
recent results from the beam energy scan program at STAR.
Seminar Indico page:
https://indico.jinr.ru/event/3328/
Zoom meeting room:
https://zoom.us/j/96880260239?pwd=dXBlcmVYZ3pRdzZHZFZYZmM3REx0UT09
Meeting ID: 968 8026 0239
Passcode: 028878
We recommend that you use your real first and last name when joining the
Zoom meeting.
With best regards,
Alexander Bednyakov
P.S. You can contact me to unsubscribe from the JINR Seminar mailing
list. The JINR employees can manage their subscriptions via
https://acc.jinr.ru
28.12.22, 15-00,Conf-hall LIT,Webinar: Voytishin N.,based on the PhD thesis
Methods and Software Complexes for the Reconstruction of Charged
Particle Trajectories in the BM@N and CMS Experiments
Voytishin Nikolay
(based on the PhD thesis)
The PhD thesis presents effective algorithms, methods and software
packages for the reconstruction of charged particle trajectories in the
cathode-strip chambers of the CMS experiment and the drift chambers of
the BM@N experiment.
Within the development of the above algorithms and software packages,
their optimal parameters for track reconstruction were determined
depending on the location of the detectors in the experimental setups
and data acquisition conditions, the geometric alignment of the
detectors and the adjustment of data sampling at the software level were
performed, and the efficiency and spatial resolution of the detectors
were evaluated for different datasets.
All the presented software packages, algorithms and methods have been
successfully implemented in the experimental software environments and
are currently used by default for charged particle trajectories
reconstruction in the corresponding detector systems.