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Extreme plasma states in laser-governed vacuum breakdown [article]

Evgeny S. Efimenko, Aleksei V. Bashinov, Sergei I. Bastrakov, Arkady A. Gonoskov, Alexander A. Muraviev, Iosif B. Meyerov, Arkady V. Kim and Alexander M. Sergeev
<span title="2017-08-31">2017</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Triggering vacuum breakdown at the upcoming laser facilities can provide rapid electron-positron pair production for studies in laboratory astrophysics and fundamental physics. However, the density of the emerging plasma should seemingly stop rising at the relativistic critical density, when the plasma becomes opaque. Here we identify the opportunity of breaking this limit using optimal beam configuration of petawatt-class lasers. Tightly focused laser fields allow plasma generation in a small
more &raquo; ... ocal volume much less than λ^3, and creating extreme plasma states in terms of density and produced currents. These states can be regarded as a new object of nonlinear plasma physics. Using 3D QED-PIC simulations we demonstrate the possibility of reaching densities of more than 10^25 cm^-3, which is an order of magnitude higher than previously expected. Controlling the process via the initial target parameters gives the opportunity to reach the discovered plasma states at the upcoming laser facilities.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1708.09636v1">arXiv:1708.09636v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/wpf4xcnebncctf6fnu2h67s2we">fatcat:wpf4xcnebncctf6fnu2h67s2we</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20191020064243/https://arxiv.org/pdf/1708.09636v1.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/95/84/9584be28253d666bce8f1c71ad0e509cd2e4a93c.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1708.09636v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Metrics and Design of an Instruction Roofline Model for AMD GPUs [article]

Matthew Leinhauser, René Widera, Sergei Bastrakov, Alexander Debus, Michael Bussmann, Sunita Chandrasekaran
<span title="2021-11-10">2021</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Due to the recent announcement of the Frontier supercomputer, many scientific application developers are working to make their applications compatible with AMD architectures (CPU-GPU), which means moving away from the traditional CPU and NVIDIA-GPU systems. Due to the current limitations of profiling tools for AMD GPUs, this shift leaves a void in how to measure application performance on AMD GPUs. In this paper, we design an instruction roofline model for AMD GPUs using AMD's ROCProfiler and a
more &raquo; ... benchmarking tool, BabelStream (the HIP implementation), as a way to measure an application's performance in instructions and memory transactions on new AMD hardware. Specifically, we create instruction roofline models for a case study scientific application, PIConGPU, an open source particle-in-cell (PIC) simulations application used for plasma and laser-plasma physics on the NVIDIA V100, AMD Radeon Instinct MI60, and AMD Instinct MI100 GPUs. When looking at the performance of multiple kernels of interest in PIConGPU we find that although the AMD MI100 GPU achieves a similar, or better, execution time compared to the NVIDIA V100 GPU, profiling tool differences make comparing performance of these two architectures hard. When looking at execution time, GIPS, and instruction intensity, the AMD MI60 achieves the worst performance out of the three GPUs used in this work.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2110.08221v2">arXiv:2110.08221v2</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/uusc263lufd7fiu6dpm6qupi5e">fatcat:uusc263lufd7fiu6dpm6qupi5e</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20211117114323/https://arxiv.org/pdf/2110.08221v2.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/38/31/383110e539b0dbc3abc0fc62f4ba0ffd334933b8.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2110.08221v2" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Extreme plasma states in laser-governed vacuum breakdown

Evgeny S. Efimenko, Aleksei V. Bashinov, Sergei I. Bastrakov, Arkady A. Gonoskov, Alexander A. Muraviev, Iosif B. Meyerov, Arkady V. Kim, Alexander M. Sergeev
<span title="2018-02-05">2018</span> <i title="Springer Nature"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/tnqhc2x2aneavcd3gx5h7mswhm" style="color: black;">Scientific Reports</a> </i> &nbsp;
Triggering vacuum breakdown at laser facility is expected to provide rapid electron-positron pair production for studies in laboratory astrophysics and fundamental physics. However, the density of the produced plasma may cease to increase at a relativistic critical density, when the plasma becomes opaque. Here, we identify the opportunity of breaking this limit using optimal beam configuration of petawatt-class lasers. Tightly focused laser fields allow generating plasma in a small focal volume
more &raquo; ... much less than λ 3 and creating extreme plasma states in terms of density and produced currents. These states can be regarded to be a new object of nonlinear plasma physics. Using 3D QED-PIC simulations we demonstrate a possibility of reaching densities over 10 25 cm −3 , which is an order of magnitude higher than expected earlier. Controlling the process via initial target parameters provides an opportunity to reach the discovered plasma states at the upcoming laser facilities. Published: xx xx xxxx OPEN www.nature.com/scientificreports/ 2 Scientific REpoRTS | (2018) 8:2329 | simulations 29 to demonstrate a possibility of reaching this scenario at the upcoming laser facilities with a total peak power of around 10 PW.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1038/s41598-018-20745-y">doi:10.1038/s41598-018-20745-y</a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pubmed/29402994">pmid:29402994</a> <a target="_blank" rel="external noopener" href="https://pubmed.ncbi.nlm.nih.gov/PMC5799438/">pmcid:PMC5799438</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/cogekl3drfghdcq6y34sfxukwy">fatcat:cogekl3drfghdcq6y34sfxukwy</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200318171926/https://research.chalmers.se/publication/500708/file/500708_Fulltext.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/3a/7f/3a7f2c579bb1d20b8b9ca0f18bbd2167f4308897.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1038/s41598-018-20745-y"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a> <a target="_blank" rel="external noopener" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5799438" title="pubmed link"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> pubmed.gov </button> </a>

Exploiting Parallelism on Shared Memory in the QED Particle-in-Cell Code PICADOR with Greedy Load Balancing [article]

Iosif Meyerov, Sergei Bastrakov, Aleksei Bashinov, Evgeny Efimenko, Alexander Panov, Elena Panova, Igor Surmin, Valentin Volokitin, Arkady Gonoskov
<span title="2019-05-20">2019</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
State-of-the-art numerical simulations of laser plasma by means of the Particle-in-Cell method are often extremely computationally intensive. Therefore there is a growing need for development of approaches for efficient utilization of resources of modern supercomputers. In this paper, we address the problem of a substantially non-uniform and dynamically varying distribution of macroparticles in a computational area in simulating quantum electrodynamic (QED) cascades. We propose and evaluate a
more &raquo; ... ad balancing scheme for shared memory systems, which allows subdividing individual cells of the computational domain into work portions with subsequent dynamic distribution of these portions between OpenMP threads. Computational experiments on 1D, 2D, and 3D QED simulations show that the proposed scheme outperforms the previously developed standard and custom schemes in the PICADOR code by 2.1 to 10 times when employing several Intel Cascade Lake CPUs.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1905.08217v1">arXiv:1905.08217v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/lk2hhvzbgjay5ik4orbqafgxwu">fatcat:lk2hhvzbgjay5ik4orbqafgxwu</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200928104622/https://arxiv.org/ftp/arxiv/papers/1905/1905.08217.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/27/0f/270fb6b316a4d0ea2a6fd7060483a52ba497c9a5.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1905.08217v1" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Co-design of a particle-in-cell plasma simulation code for Intel Xeon Phi: a first look at Knights Landing [article]

Igor Surmin, Sergey Bastrakov, Zakhar Matveev, Evgeny Efimenko, Arkady Gonoskov, Iosif Meyerov
<span title="2016-08-02">2016</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Bastrakov and I. Meyerov are grateful to Intel Corporation for access to the system used for performing computational experiments presented in this paper.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/1608.01009v1">arXiv:1608.01009v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/q5jhrmvxmfbjjjnlzjlwjxlpjq">fatcat:q5jhrmvxmfbjjjnlzjlwjxlpjq</a> </span>
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Exascale Laser Plasma Physics - From Computational Speed to Predictions

Axel Huebl, René Widera, Marco Garten, Richard Pausch, Klaus Steiniger, Sergei Bastrakov, Felix Meyer, Ksenia Bastrakova, Alexander Debus, Simeon Ehrig, Matthias Werner, Benjamin Worpitz (+7 others)
<span title="2019-07-11">2019</span> <i title="Zenodo"> Zenodo </i> &nbsp;
Invited presentation given by Axel Huebl (HZDR, Germany) at the EPS 2019 conference in Milano (Italy) on July 11th, 2019.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5281/zenodo.3332813">doi:10.5281/zenodo.3332813</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/6xlq64nycjgh3acn52xjs5hn2i">fatcat:6xlq64nycjgh3acn52xjs5hn2i</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20201226132600/https://zenodo.org/record/3332814/files/2019_07_11_EPS19_Huebl_PIConGPU_pdf.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/6c/da/6cda29e3c0cc944095135575927ea46ef9aebad0.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5281/zenodo.3332813"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> zenodo.org </button> </a>

Scalable Multi-Platform PIC Simulations as an Open Science Service

Axel Huebl, Richard Pausch, René Widera, Marco Garten, Alexander Debus, Ilja Goethel, Alexander Matthes, Felix Meyer, Benjamin Worpitz, Sebastian Starke, Jeffrey Kelling, Sophie Rudat (+6 others)
<span title="2018-08-14">2018</span> <i title="Zenodo"> Zenodo </i> &nbsp;
PIConGPU is a fully open, community-driven, 3D and 2D3V particle-in-cell code for the age of heterogeneous, many-core driven supercomputing. Developed in a single source C++ code base, PIConGPU supports both "traditional" CPU architectures as well as modern and highly parallel architectures such as OpenPOWER, Xeon Phi, and Nvidia GPUs. PIConGPU has shown to be suitable for production runs on the full system size of TOP5 clusters such as Titan (ORNL) and Piz Daint (CSCS). Machines like those
more &raquo; ... le few-hour turnarounds for full 3D3V simulations on complex studies such as laser-ion acceleration from mass-limited targets, long-scale laser-wakefield acceleration with high bunch charges, and hybrid acceleration schemes. The resulting output of systematic parameter scans (PBytes+) raises a severe challenge for data centers. We address these issues with modern IO frameworks, performance modeling, and in situ data reduction techniques. Using such online methods we can investigate a wide range of observables relevant for experiments and run dozens of simulations at the same time frame as an experimental beam time. PIConGPU is further complemented by modern methods for photon generation, transport, as well as X-ray interaction. This simulation framework aims to provide documented, installable, and re-usable software components for the community, well-suited for open data (openPMD) and open science workflows without restrictions. Latest developments include a python-centric, extensive framework for specific experiments, which provides all of the above in an intuitive, non-expert user interface.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5281/zenodo.1345079">doi:10.5281/zenodo.1345079</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/rg4nhdlqp5gcxa3ldgzq4l4a5e">fatcat:rg4nhdlqp5gcxa3ldgzq4l4a5e</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200310054354/https://zenodo.org/record/1345080/files/2018_08_14_Huebl_PIConGPU_AAC.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/45/ed/45ed3d0492330b9cad9838b478a60dbbebd2244c.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5281/zenodo.1345079"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> zenodo.org </button> </a>

Challenges Porting a C++ Template-Metaprogramming Abstraction Layer to Directive-based Offloading [article]

Jeffrey Kelling, Sergei Bastrakov, Alexander Debus, Thomas Kluge, Matt Leinhauser, Richard Pausch, Klaus Steiniger, Jan Stephan, René Widera, Jeff Young, Michael Bussmann, Sunita Chandrasekaran (+1 others)
<span title="2022-01-24">2022</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
HPC systems employ a growing variety of compute accelerators with different architectures and from different vendors. Large scientific applications are required to run efficiently across these systems but need to retain a single code-base in order to not stifle development. Directive-based offloading programming models set out to provide the required portability, but, to existing codes, they themselves represent yet another API to port to. Here, we present our approach of porting the
more &raquo; ... ated particle-in-cell code PIConGPU to OpenACC and OpenMP target by adding two new backends to its existing C++-template metaprogramming-based offloading abstraction layer alpaka and avoiding other modifications to the application code. We introduce our approach in the face of conflicts between requirements and available features in the standards as well as practical hurdles posed by immature compiler support.
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2110.08650v2">arXiv:2110.08650v2</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/65k2l6te6baldcjhsqjcvbgupq">fatcat:65k2l6te6baldcjhsqjcvbgupq</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20220128191201/https://arxiv.org/pdf/2110.08650v2.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/2e/68/2e68e7f1de4184525ebd4515412cc5cd6104448e.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2110.08650v2" title="arxiv.org access"> <button class="ui compact blue labeled icon button serp-button"> <i class="file alternate outline icon"></i> arxiv.org </button> </a>

Jugoslavia – venäläisen sarjakuvan kehto

Aleksi Kuutio
<span title="2020-04-15">2020</span> <i title="Idantutkimus"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/d57t6pcme5g2pik2xllx6gvlpa" style="color: black;">Finnish Review of East European Studies</a> </i> &nbsp;
1945] : Korolevstvo Jugoslavija on erityisen kiinnostava, sillä se kokoaa ensi kertaa yhteen seitsemäntoista näiden varhaisten venäläisten sarjakuvataiteilijoiden -Konstantin Kuznetsov, Aleksei Ranhner, Sergei  ...  Teoksen päätoimittaja Dmitri Bastrakov kertoo esipuheessaan, että sarjakuvia on kerätty ympäri Eurooppaa ja ostettu keräilijöiden kokoelmista.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.33345/idantutkimus.91929">doi:10.33345/idantutkimus.91929</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/uwxl6h5te5fdbaxw2bp32uziky">fatcat:uwxl6h5te5fdbaxw2bp32uziky</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20210428060530/https://journal.fi/idantutkimus/article/download/91929/56980" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/4f/fa/4ffa10716d0d8250243625650dc331cb8a94884b.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.33345/idantutkimus.91929"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> Publisher / doi.org </button> </a>

Scalable, Data Driven Plasma Simulations with PIConGPU

Axel Huebl, René Widera, Marco Garten, Richard Pausch, Klaus Steiniger, Sergei Bastrakov, Felix Meyer, Ksenia Bastrakova, Alexander Debus, Thomas Kluge, Simeon Ehrig, Matthias Werner (+5 others)
<span title="2019-06-13">2019</span>
PIConGPU is an open source, multi-platform particle-in-cell code scaling to the fastest supercomputers in the TOP500 list. We present the architecture, novel developments, and workflows that enable high-precision, fast turn-around computations on Exascale-machines. Furthermore, we present our strategies to handle extreme data flows from thousands of GPUs for analysis with in situ processing and open data formats (openPMD). PIConGPU is since recently furthermore natively controlled by a Python
more &raquo; ... pyter interface and we research just-in-time kernel generation for C++ with our Cling-CUDA extensions.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.14278/rodare.131">doi:10.14278/rodare.131</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/syri5ejbfjhlnexr4h35jweb6q">fatcat:syri5ejbfjhlnexr4h35jweb6q</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20200109212341/https://rodare.hzdr.de/record/131/files/2019_06_12_PASC19_Huebl_PIConGPU.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/b2/5c/b25cfe0da61144cf697455ac72230ba87fbe5ccc.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.14278/rodare.131"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

Parallel Algorithm with Modulus Structure for Simulation of Seismic Wave Propagation in 3D Multiscale Multiphysics Media [chapter]

Victor Kostin, Vadim Lisitsa, Galina Reshetova, Vladimir Tcheverda
<span title="">2017</span> <i title="Springer International Publishing"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/2w3awgokqne6te4nvlofavy5a4" style="color: black;">Lecture Notes in Computer Science</a> </i> &nbsp;
Bastrakov, Igor Surmin, Evgeny Efimenko, Arkady Gonoskov, Iosif Meyerov Software implementation of mathematical model of thermodynamic processes in a steam turbine on high-performance system Aleksandr  ...  Parallel algorithms for an implicit CFD solver on tree-based grids Pavel Pavlukhin, Igor Menshov (KIAM RAS) Performance aspects of collocated and staggered grids for Particle-in-Cell plasma simulation Sergey  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/978-3-319-62932-2_4">doi:10.1007/978-3-319-62932-2_4</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/3floyq6ajjeb5aqf5ehcgnu7qe">fatcat:3floyq6ajjeb5aqf5ehcgnu7qe</a> </span>
<a target="_blank" rel="noopener" href="https://web.archive.org/web/20190217220106/http://pdfs.semanticscholar.org/088a/c83b2bbd55cbf85b510c2635f26db53f0990.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/08/8a/088ac83b2bbd55cbf85b510c2635f26db53f0990.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1007/978-3-319-62932-2_4"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="external alternate icon"></i> springer.com </button> </a>

Ethiopian Oribatid Mites (Acari: Oribatida) from the Joint Russian-Ethiopian Biological Expedition (2012), With Description of a New Species

Sergey G. Ermilov, Leonid B. Rybalov
<span title="">2014</span> <i title="Natal Museum of South Africa"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/fhsrikjrnjb5lkkbjtdulosgbm" style="color: black;">African Invertebrates</a> </i> &nbsp;
Bastrakov of the Institute of Ecological and Evolutionary Problems, Russian Academy of Sciences (RAS) for sampling assistance.  ...  Bastrakov). Et-12-11: 08°58'N 37°51'E, Ambo Plant Protection Research Center, xerophytic forest on vertisols, 2077 m, litter (sifter), 20.xi.2012 (collected by L.B. Rybalov and A.I. Bastrakov).  ... 
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<a target="_blank" rel="noopener" href="https://web.archive.org/web/20140606045245/http://africaninvertebrates.org:80/ojs/index.php/AI/article/viewFile/341/317" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/67/2c/672cad45b6ccd7136d7d3c86da54e3a69fb95623.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.5733/afin.055.0101"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>

Experimental determination of calcite solubility and the stability of aqueous Ca– and Na–carbonate and –bicarbonate complexes at 100-160°C and 1-50 bar pCO2 using in situ pH measurements

A.Yu. Bychkov, P. Bénézeth, O.S. Pokrovsky, Yu.V. Shvarov, A. Castillo, J. Schott
<span title="">2020</span> <i title="Elsevier BV"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/qfubwdnqbff7jczqebjahe655a" style="color: black;">Geochimica et Cosmochimica Acta</a> </i> &nbsp;
Acknowledgments The authors thank Sergey Golubev for assistance in analytical measurements, Alexander Zotov for discussing the results.  ...  Activity coefficients of all ions were computed using the Helgeson B-dot equation (Helgeson, 1969) with parameters from Shvarov and Bastrakov (1999) .  ...  Thermodynamic calculations We used the HCh software package (Shvarov, 1981; Shvarov and Bastrakov, 1999; Shvarov, 2008) , employing algorithms of free energy minimization.  ... 
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New Oribatid Mites of the Superfamily Ceratozetoidea (Acari: Oribatida) from Ethiopia

Sergey G. Ermilov, Ekaterina A. Sidorchuk, Leonid B. Rybalov
<span title="">2011</span> <i title="Natal Museum of South Africa"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/fhsrikjrnjb5lkkbjtdulosgbm" style="color: black;">African Invertebrates</a> </i> &nbsp;
Bastrakov (PC). Distribution: At present, this species is only known from Ethiopia.  ...  Bastrakov (ZISP). 4367 m, plants Artemisia spp. and Oxytriops ), (tc), (it), (p), (u), (a), s,(pv), v', (pl), l'', e, 1 , 2 II v' d, (l), bv", v" (l), v',(l), (v (ft), (tc), (it), (p), (u), (a), s, (  ... 
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STUDY OF THE INFLUENCE OF SPHERICAL INCLUSIONS ON MECHANICAL CHARACTERISTICS

Arseniy V. BABAYTSEV, Ye Ko KYAW, Sergey N. VAKHNEEV, Thant ZIN HEIN
<span title="2020-07-20">2020</span> <i title="Dr. D. Scientific Consulting"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/pcpyel632bglhh3ousgse3htoa" style="color: black;">Periódico Tchê Química</a> </i> &nbsp;
., Bastrakov, V. M., and Physical and mechanical characteristics of materials Zabrodin, A. G. (2010). The study of the properties of the matrix for polymer composite materials.  ... 
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<a target="_blank" rel="noopener" href="https://web.archive.org/web/20220429211614/http://www.deboni.he.com.br/arquivos_jornal/2020/35/56_BABAYTSEV_pgs_654_662.pdf" title="fulltext PDF download" data-goatcounter-click="serp-fulltext" data-goatcounter-title="serp-fulltext"> <button class="ui simple right pointing dropdown compact black labeled icon button serp-button"> <i class="icon ia-icon"></i> Web Archive [PDF] <div class="menu fulltext-thumbnail"> <img src="https://blobs.fatcat.wiki/thumbnail/pdf/fb/b2/fbb2c3ad9aaffe22b8fce97282026b91cbc85883.180px.jpg" alt="fulltext thumbnail" loading="lazy"> </div> </button> </a> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.52571/ptq.v17.n35.2020.56_babaytsev_pgs_654_662.pdf"> <button class="ui left aligned compact blue labeled icon button serp-button"> <i class="unlock alternate icon" style="background-color: #fb971f;"></i> Publisher / doi.org </button> </a>
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