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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Petr Stepanov • Research and Development Resume</title>
<meta name="description" content="PhD in Photochemical Sciences. Over five years in frontend web development and web design. Somewhere between geek and normal. ">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" type="text/css" href="css/app.css">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
<link rel="manifest" href="/site.webmanifest">
<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#007bff">
<meta name="msapplication-TileColor" content="#ffffff">
<meta name="theme-color" content="#ffffff">
</head>
<body>
<script src="js/splash.js"></script>
<div class="jumbotron mb-0 px-0">
<div class="container">
<div class="row align-items-center justify-content-center justify-content-lg-between">
<div class="col-5 d-lg-none"> <img src="img/petr-stepanov-2023.jpg" class="rounded-circle w-100 mb-4" alt="Petr Stepanov profile picture" /> </div>
<div class="col-12 col-lg-9 col-xl-8 text-center text-lg-left">
<p><code class="text-black-50">Hi, my name is</code></p>
<h1 class="display-4 my-4 lh-dense">Petr Stepanov</h1>
<p class="lead my-1">I am a PhD graduate in Photochemical Sciences, a desktop and frontend developer with strong user interface design skills.</p>
<div class="mt-4 lh-spacy">
<a class="btn btn-primary mt-3 mr-lg-3" href="mailto:stepanovps@gmail.com">Get in touch</a> <br class="d-lg-none" />
<a class="btn btn-outline-primary mt-3 mr-md-3" target="_blank" href="static/petr-stepanov-cs.pdf"><ion-icon name="desktop-outline" class="mr-2"></ion-icon> Computer Science Resume</a>
<a class="btn btn-outline-primary mt-3" href="static/petr-stepanov-ms.pdf"><ion-icon name="rocket-outline" class="mr-2"></ion-icon> Materials Science Resume</a>
</div>
</div>
<div class="d-none d-lg-block col-lg-3"> <img src="img/petr-stepanov-2023.jpg" class="rounded-circle w-100 mb-4" alt="Petr Stepanov profile picture" /> </div>
</div>
</div>
</div> <!-- The Address Modal -->
<div class="modal fade" id="addressModal">
<div class="modal-dialog modal-dialog-centered">
<div class="modal-content"> <!-- Modal body -->
<div class="modal-body"> <iframe src="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d89432.96965794895!2d-122.7686328777207!3d45.5346264710751!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x549509e44d6a60ab%3A0x8b6acf769eea580d!2s2270%20NW%20Savier%20St%2C%20Portland%2C%20OR%2097210!5e0!3m2!1sen!2sus!4v1703037038807!5m2!1sen!2sus&zoom=2" width="100%" height="450" style="border:0;" allowfullscreen="" loading="lazy" referrerpolicy="no-referrer-when-downgrade"></iframe> </div> <!-- Modal footer -->
<div class="modal-footer"> <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button> </div>
</div>
</div>
</div>
<div class="container-white">
<div class="container py-5">
<div class="row">
<div class="col-sm">
<address>
<dl class="row">
<dt class="col-4 col-md-3 col-lg-2">Phone:</dt>
<dd class="col-8 col-md-9 col-lg-10"><a href="tel:+14194968602">+1 (419) 496-8602</a></dd>
<dt class="col-4 col-md-3 col-lg-2">Email:</dt>
<dd class="col-8 col-md-9 col-lg-10"><a href="mailto:stepanovps@gmail.com">stepanovps@gmail.com</a></dd>
<dt class="col-4 col-md-3 col-lg-2">Current address:</dt>
<dd class="col-8 col-md-9 col-lg-10"> <!-- <a href="https://www.google.com/maps/place/1407+Napoleon+Rd,+Bowling+Green,+OH+43402" target="_blank" rel="nofollow">1407 Napoleon Rd, Bowling Green, OH, 43402</a><br/>Willing to relocate.--> <!-- <a href="https://goo.gl/maps/q5eRtLmGu6BCyxae8" target="_blank" rel="nofollow">514 Woodrow St, Apt F, Columbia, SC, 29205, United States</a><br/>Willing to relocate. --> <!-- <a href="https://goo.gl/maps/Lzmnw4o79hrDrW778" target="_blank" rel="nofollow">181 Gate House Rd, Newport News, VA 23608, United States</a><br/>Willing to relocate. --> <!-- <a href="https://goo.gl/maps/8Mz6zr9PCuJrYczu8" target="_blank" rel="nofollow">12000 Jefferson Ave Ste 16 (F206-10), Newport News, VA 23606, United States</a><br/>Willing to relocate. --> <button type="button" class="btn btn-link px-0 py-0 text-left" style="border: 0" data-toggle="modal" data-target="#addressModal">2270 NW Savier St, Portland, OR 97210, United States</button> <br />Willing to relocate. </dd>
</dl>
</address>
<h2 class="my-5 pt-4" id="objective">Objective</h2>
<p class="lead"><a href="https://www.bgsu.edu/" title="Bowling Green State University">BGSU</a> Ph.D. graduate with expertise in gamma spectroscopy, positron annihilation spectroscopy, microscopy, and nuclear physics. Strong background in computational techniques, desktop software development, and web applications. More than five years in user interface and user experience design.</p>
<ul class="lead">
<li>Seeking a software development position in the industry.</li>
<li>Willing to join a computational sciences department at a National Lab.</li>
</ul>
<hr class="my-4" />
<p>🗽 Permanent resident authorized to work in the USA.</p>
<h2 class="my-5 pt-4" id="skills">Computer skills</h2>
<dl class="row">
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🛠</span>️ Basics.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">Git, Terminal, SSH, BASH scripting. Jira. </dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🎨</span> UI/UX design.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">Figma, Sketch, Adobe Photoshop, Illustrator, Blender. </dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🖥️</span> Desktop development.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">C/C++ and Qt, compiling from source (gcc, GNU makefiles). Eclipse IDE.</dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🖲️</span> Frontend.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">HTML, CSS (SASS), Bootstrap, responsive web design, JavaScript and jQuery, npm, gulp, VS Code. </dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🕳</span>️ Backend.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">Node.js, EJS.</dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">📱</span> iOS development. </dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">Swift, xCode. User interface development with UiKit and storyboards.</dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">📊</span> Scientific tools. </dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">High-Performance Computing (HPC), Python, CERN ROOT, Geant4, Wolfram Mathematica, Gnuplot, Origin.</dd>
<dt class="col-12 col-md-4 col-lg-3 mb-2"><span class="tab-emoji">🖋</span> Markup.</dt>
<dd class="col-12 col-md-8 col-lg-9 mb-3 skill-align">LaTeX, MS Office Suite.</dd>
</dl>
<h2 class="my-5 pt-4" id="research-skills">Material research skills</h2>
<p><strong>Characterization facilities</strong>. Positron Lifetime and Doppler Broadening Annihilation Spectroscopy (PALS, DBAR). Atom Probe Tomography (ATP). Scanning Electron Microscopy (SEM). Transmission electron microscopy (TEM). Atomic Force Microscopy (AFM). UV-VIS Spectroscopy. Fourier Transform Infrared Spectroscopy (FTIR).</p>
<p><strong>Materials processing</strong>. High-temperature annealing. Wet chemical etching. Electrical Contact Fabrication. Sample polishing.</p>
<h2 class="my-5 pt-4" id="experience">Work experience</h2>
<ul class="list-unstyled">
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-jlab.svg" alt="Jefferson Lab logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Research Scientist</h3>
<p class="h6 text-muted"><a href="https://www.jlab.org/" rel="nofollow" target="_blank" title="Thomas Jefferson National Accelerator Facility">Thomas Jefferson National Accelerator Facility</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Newport News, VA, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2020-07">Jul 2020</time> - <time datetime="2023-01">Jan 2023</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Coded a Geant4-based simulation for studying the optimal light guide length (range 0-10 cm) for the <a href="https://wiki.jlab.org/cuawiki/index.php/Electron-Ion_Collider_Detectors:_EEEMCal">EM calorimeter</a> used in the Electron-Ion-Collider (EIC) project. <a href="https://github.com/petrstepanov/light-guides">Link to GitHub</a>.</li>
<li>Used Machine Learning (ML) techniques to perform binary classification of thousands of signals from a data acquisition (DAQ) setup. <a href="https://github.com/petrstepanov/dual-readout-tmva">Link to GitHub</a>. </li>
<li>Applied CERN ROOT framework (C++) to perform statistical analysis of a significant amount (over 100 GB) of the raw experimental data of the Kaon LT experiment at JLab. <a href="https://github.com/petrstepanov/kaonlt-fit">Link to GitHub</a>. </li>
<li>Utilized SLURM functionality on the <a href="https://scicomp.jlab.org/scicomp/index.html"></a>JLab High-Performance Computing (HPC)</a> environment to execute a series of simulations in parallel. This reduced the wall time by more than 10 times.</li>
<li>Proposed and implemented RAMDisk functionality in the development environment. This led to an over 60% increase in source code indexing time.</li>
<li>Replaced proprietary MS Windows-based data acquisition (DAQ) system with an <a href="https://github.com/petrstepanov/tek" title="Triggered Waveform Data Acquisition (DAQ) Script for MDO4034C">open-source solution</a>. This eliminated random crashes during continuous acquisition.</li>
<li>Active collaborator of the <a href="https://redmine.jlab.org/projects/hall-c/wiki/">Pion LT project</a>. Committed over 50 shifts performing Target Operator and Shift Leader duties in the experimental Hall C counting room.
</ul>
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-cua.svg" alt="Catholic University of America (CUA) logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Postdoctoral Researcher</h3>
<p class="h6 text-muted"><a href="https://www.catholic.edu/index.html" rel="nofollow" target="_blank" title="Catholic University of America">Catholic University of America</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Washington, DC, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2020-07">Jul 2020</time> - <time datetime="2023-01">Jan 2023</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Programmed a Geant-4 computer simulation (C++, CMake, Eclipse IDE, gdb) to study the performance of a novel scintillation material for EIC, Brookhaven National Lab. <a href="https://github.com/petrstepanov/geant4-glass">Link to GitHub</a>.</li>
<li>Visualized energy deposition profiles and calculated energy resolutions for a variety of detector assemblies.</li>
<li>Teaching experience: mentoring students within a 3-month Research Experiences for Undergraduates (REU) program at the Physics Department at CUA. Giving talks and presentations about <a href="https://petrstepanov.com/static/presentations/presentation-2021-06-03-linux-terminal.pdf">Linux Terminal</a>, and <a href="https://petrstepanov.com/static/presentations/presentation-2021-06-17-jlab-geant-root.pdf">supercomputer environment</a>.</li>
<li>Enhanced debugging of the core library source code led to opening more than <a href="https://root-forum.cern.ch/u/petrstepanov/activity/topics">10 bug reports</a> on the ROOT (C++) forum.</li>
</ul>
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-freelance.svg" alt="Freelance logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Freelance UI/UX Designer and Frontend Developer</h3>
<p class="h6 text-muted">Remote Positions</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2011-12">Sept 2014</time> - <time datetime="2022-02">Current</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Built an online e-commerce store <a href="https://stickerstore.llc/">Sticker Store LLC</a> with static website generator (Hexo, Snipcart, Bootstrap, SASS, EJS, Node.js).</li>
<ul>
<li>Improved the Google PageSpeed Insights metrics (CLS, LCP) up to 97%.</li>
<li>Created a recursive script to export over 300 products from the YAML file to Google Merchant.</li>
<li>Optimized SEO. The project reached over 1400 organic monthly users.</li>
</ul>
<li>Made iOS application (Swift, UIkit, storyboards) for the <a href="https://we.team/en/">We.Team messenger</a> (more than 3k monthly downloads in AppStore). Participated in cloud-based messenger development with enhanced file sharing capabilities (HTML, React JS, SASS).</li>
<li>Migrated the landing page for <a href="https://sweetbridge.com/">Sweetbridge</a> company from WordPress to Jekyll static site generator (Ruby, CSS). This resulted in a 70% improvement in the page load time.</li>
<li>Developed the front-end part (Angular.js, HTML, LESS) for <a href="https://myli.li/">Lili Social</a> network.</li>
<ul>
<li>Assisted with the front-end styling and animations for the iOS mobile application (Ionic).</li>
<li>Enabled SEO crawling of over 1000 Angular.js pages with Google bot.</li>
</ul>
<li>Web design.</li>
<ul>
<li>Designed logos, UI/UX prototypes (Figma, Sketch, Illustrator) and branding identity for over <a href="https://dribbble.com/petrstepanov">10 different companies</a>.</li>
<li>Converted numerous design assets and mockups into responsive HTML and CSS (Bootstrap).</li>
<li>Mocked up and integrated dozens of cross-browser responsive email templates. </li>
</ul>
</ul> <!-- <p><b>UX and UI</b>. Developing the branding identity and guidelines for companies. Creating logos, establishing visual language, and making interactive prototypes (Figma, Sketch, Illustrator). Slicing mockups into responsive HTML and CSS. Preparing image assets for developers. Designing and coding responsive newsletter email templates.</p> <p><b>Frontend</b>. Writing gulp build scripts (LESS, SASS, browserify, image compression). Extending Bootstrap and other frameworks to correspond to clients’ designs. Writing custom SCSS from scratch. Programming frontend interactions with modular JavaScript and jQuery. Some experience with Node.js, EJS. Participated in projects with Angular and React frameworks.</p> <p><b>Mobile</b>. Worked on iOS apps with Swift and UIKit. Familiar with Ionic framework.</p> -->
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-photochem.svg" alt="BGSU Center for Photochemical Sciences logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Research Assistant, Software Developer</h3>
<p class="h6 text-muted"><a href="https://www.bgsu.edu/arts-and-sciences/center-for-photochemical-sciences.html" rel="nofollow" target="_blank" title="Center for Photochemial Sciences">Center for Photochemical Sciences</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Bowling Green, OH, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2011-12">Sept 2014</time> - <time datetime="2020-05">May 2020</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Applied ROOT C++ libraries to write four GUI open-source software for scientific data interpretation. </li>
<ul>
<li>GitHub repositories contain over 10k lines of code in total: <a href="https://github.com/petrstepanov/sw-calculator">SW Calculator</a>, <a href="https://github.com/petrstepanov/tlist-processor">TLIST Processor</a>, <a href="https://github.com/petrstepanov/roopositron">RooPositron</a>, <a href="https://github.com/petrstepanov/luminapp">LuminApp</a>. </li>
<li>Technologies used: CMake, C++, ROOT, Fox GUI, and RooFit libraries. Java and Swing.</li>
<li>Extended default ROOT GUI library (Qt-based) to <a href="https://github.com/petrstepanov/root-mvp-gui">support the MVP design</a> pattern.</li>
</ul>
<li>Wrote a GUI application <a href="https://github.com/petrstepanov/luminapp">LuminApp</a> (Java, Swing) to parse and merge time-stamped data from optical spectrometer and thermometer. This increased data processing time by two orders of magnitude.</li>
<li>Developed static website (Hexo, Gulp, Bootstrap) and visual identity for the <a href="https://physics.bgsu.edu/selimlab/">SelimLab</a> research group. The website has a 99% Google performance rank and features 700 ms time to interactive metrics.</li>
<li>Maintained local Apache HTTP server <a href="https://physics.bgsu.edu/">physics.bgsu.edu</a> hosting over 10 websites at the BGSU.</li>
<li>Created <a href="https://physics.bgsu.edu/icpa18/">website for the ICPA-18</a> international conference with registration (over 150 users) and payment system workflow (WordPress, PHP, Recurly.js), and <a href="https://physics.bgsu.edu/IWZnO_2020/index.html">landing pages</a> for events.</li>
</ul> <!-- <p>Material science research, interaction of ionizing radiation with matter, radiation defects in solids, radiation chemistry. Gamma-spectroscopy. Positron annihilation spectroscopy. Maintaining and tune-up of fast-timing ORTEC and Canberra electronics. Manufacturing of the radioactive positron sources.</p> <p>Designing and developing desktop software for experimental spectra fitting and interpretation. GNU Automake, C++, CERN ROOT, and RooFit libraries. Occasionally used Java and Swing.</p> <p>Building websites for conferences with registration and payment system workflow (WordPress, PHP, Recurly.js). Creating websites with static site generators (Jekyll, Hexo).</p> -->
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-gridnine.svg" alt="Gridnine Systems logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Web Designer, Frontend Web Developer</h3>
<p class="h6 text-muted"><a href="https://gridnine.com/" rel="nofollow" target="_blank" title="Gridnine Systems">Gridnine Systems</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Moscow, Russia</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2011-04">Apr 2011</time> - <time datetime="2014-08">Aug 2014</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Responsible for the front-end development of the <a href="https://www.ath.ru/english/">ATH American Express</a> – the largest travel management company in Russia (JavaScript, Backbone.js, and RequireJS). Increased the front-end load time by over 30%.</li>
<li>Utilized Google Web Toolkit (GWT) Model-View-Presenter (MVP) framework to develop frontend for <a href="https://we.team/en/">Otixo</a> cloud file integrator (JavaScript, CSS, responsive design).</li>
<li>Implemented image processing servlets on the backend to generate banners for five different social networks (PHP, ImageMagic).</li>
<li>Prototyping conceptual wireframes and UI/UX mockups for numerous web applications (Adobe Creative Suite).</li>
</ul> <!-- <p>Prototyping conceptual wireframes and visual mockups for web applications (Photoshop, Illustrator).</p> <p>Developing frontend part of many corporate web applications (Google Web Toolkit, JavaScript, Backbone.js, and Require.js). Responsive layout with SASS and LESS. Doing some server-side backend programming (Java).</p> -->
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-yunium.png" alt="Yunium logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Computer Science Teacher</h3>
<p class="h6 text-muted"><a href="https://mipt.ru/english/" rel="nofollow" target="_blank" title="Moscow Institute of Physics and Technology">Yunium Educational Center at MIPT</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Moscow, Russia</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2009-10">Oct 2009</time> - <time datetime="2011-05">May 2011</time></div>
</div>
</div>
</div>
<p>Provided instructions and guidance to middle school students on the following computer courses: </p>
<ul class="my-list">
<li>C and C++ programming.</li>
<li>Markup on the web (HTML, CSS).</li>
<li>Raster graphics and Adobe Photoshop.</li>
<li>Modelling in 3D Studio Max.</li>
</ul>
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-itep.png" alt="ITEP logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Research Scientist</h3>
<p class="h6 text-muted"><a href="https://en.wikipedia.org/wiki/Institute_for_Theoretical_and_Experimental_Physics" rel="nofollow" target="_blank" title="Institute for Theoretical and Experimental Physics">Institute for Theoretical and Experimental Physics (ITEP)</a> <br class="d-lg-none" /><span class="d-none d-lg-inline px-2">•</span> Moscow, Russia</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2008-09">Sept 2008</time> - <time datetime="2011-04">Apr 2011</time></div>
</div>
</div>
</div>
<ul class="my-list">
<li>Application of Lositron Annihilation Lifetime Spectroscopy (PALS) for studying the radioactive-induced defects in steels.</li>
<li>Applied CERN ROOT libraries for fitting and analysis of experimental data.</li>
<li>Monte-Carlo particle simulations with Fortran 95.</li>
<li>Installed step motors to rotate the sample inside the Tomographic Atom Probe chamber. Developed the software to support the rotation.</li>
<li>Improved the CAMECA software to increase the accuracy of data reconstruction for the Tomographic Atom Probe (MSVC).</li>
</ul>
</li>
</ul>
<h2 class="my-5 pt-4" id="education">Education</h2>
<ul class="list-unstyled">
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-bgsu.svg" alt="BGSU logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Bowling Green State University <a href="https://www.bgsu.edu/" rel="nofollow" target="_blank" title="Bowling Green State University" class="ml-2"><i class="icon-font ion-md-open"></i></a></h3>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2014-09">Aug 2014</time> - <time datetime="2019-12">May 2020</time></div>
</div>
<p class="h6 mb-0 text-muted">Bowling Green, OH, USA</p>
</div>
</div>
<p><span class="badge badge-dark">Ph.D.</span> <strong>Doctor of Philosophy in photochemical sciences</strong>. Occupation: materials science, interaction of ionizing radiation with matter, radiation defects in solids, radiation chemistry, gamma-spectroscopy, positron annihilation spectroscopy.</p>
<p><strong>Dissertation topic:</strong> New developments in positron annihilation spectroscopy techniques: from experimental setups to advanced processing software. <a href="/static/petr-stepanov-dissertation-latest.pdf">Download manuscript with corrections</a>.</p>
<p>Under the guidance of Dr. Selim I have successfully assembled and maintained Doppler and lifetime positron spectrometers from ORTEC and Canberra fast-timing units. My research was aimed at the application of Doppler and lifetime positron spectroscopy techniques to study the following effects in materials:</p>
<ul class="my-list my-2">
<li>Defects and grain sizes in solids.</li>
<li>Kinetics of positrons and positronium atoms in nano-powders.</li>
<li>Oxidation and ortho-para conversion of positronium atoms in liquids.</li>
</ul>
<p>My research required a good understanding of single-photon counting techniques with HPGe and scintillation-based detector systems. I manufactured sources of positron radiation and was responsible for inventorying the radioactive materials.</p>
<p>I have developed several open-source desktop GUI software solutions for fitting and interpreting the raw positron experimental spectra. Software is written in C++, it extensively utilizes the CERN ROOT and RooFit frameworks.</p>
<p>Additionally, I created was responsible for creating websites for the research groups and international conferences.</p>
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-mephi.svg" alt="MEPhI logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">National Research Nuclear University <a href="https://eng.mephi.ru/" rel="nofollow" target="_blank" title="National Research Nuclear University" class="ml-2"><i class="icon-font ion-md-open"></i></a></h3>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2004-10">Sept 2004</time> - <time datetime="2011-02">Feb 2011</time></div>
</div>
<p class="h6 mb-0 text-muted">Moscow, Russia</p>
</div>
</div>
<p><span class="badge badge-dark">B.S.</span> <span class="badge badge-dark">M.S.</span> <strong>Bachelor and Master of Science in solid state physics</strong>. Monte-Carlo particle simulations with Fortran 95. Maintaining software for CAMECA tomographic atom probe (MSVC). Application of CERN ROOT libraries for fitting and analysis of experimental data. </p>
<p><strong>Thesis topic:</strong> Radiation defect studies of nuclear power plant vessel steels by means of positron lifetime annihilation spectroscopy.</p>
</li>
</ul>
<h2 class="my-5 pt-4" id="courses">Relevant courses</h2>
<ul class="list-unstyled">
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-workshop.svg" alt="OSC logo">
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">Ohio Supercomputer Workshop <a href="https://www.osc.edu/" rel="nofollow" target="_blank" title="Ohio Supercomputer Center" class="ml-2"><i class="icon-font ion-md-open"></i></a></h3>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2011-12">Jan 2017</time></div>
</div>
<p class="h6 mb-0 text-muted">Bowling Green, OH, USA</p>
</div>
</div>
<p><strong>Hands-on sessions</strong> on supercomputer operation. Got familiar with the newest developments in the supercomputer services: network use with SSH, job control with <a href="https://slurm.schedmd.com">SLURM scripts</a>, RedHat and CentOS operating systems, <a href="https://cmake.org/">CMake</a> compiling platform, parallel environments and more.</p>
</li>
<li class="mt-3 mb-5">
<div class="d-flex align-items-start align-items-md-center mb-3"> <img class="logo-circ mr-3" src="img/logo-bhsad.svg" alt="BHSAD logo" />
<div class="flex-grow-1">
<div class="row">
<div class="col-12 col-md-8">
<h3 class="h5">British Higher School of Art and Design <a href="https://britishdesign.ru/en/" rel="nofollow" target="_blank" title="British Higher School of Art and Design" class="ml-2"><i class="icon-font ion-md-open"></i></a></h3>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2011-12">Dec 2011</time> - <time datetime="2012-02">Feb 2012</time></div>
</div>
<p class="h6 mb-0 text-muted">Moscow, Russia</p>
</div>
</div>
<p><strong>Three-month intensive:</strong> <a href="https://britishdesign.ru/en/courses/f/communication-design/">graphical design and visual communications</a>.</p>
<p>Introduction to the major tricks and instruments of visual communication; learning fundamental rules of illustrations, typography, fonts, and lettering. Intensives on brand identity, graphical language, and advertising campaigns.</p>
</li>
</ul>
<h2 class="my-5 pt-4" id="web-projects">Web Projects</h2>
<div class="card-columns">
<div class="card">
<div class="img-gradient"> <img src="https://cdn.dribbble.com/users/118393/screenshots/5330454/dribbble_1x.png" class="card-img-top" alt="Bimmer Sticker Store"> </div>
<div class="card-body">
<h5 class="card-title">Sticker Store LLC</h5>
<p class="card-text">Website that features a collection of vinyl stickers for cars.</p>
<p class="card-text"><code class="text-black-50">Figma HTML SCSS Hexo JS</code></p>
</div>
<hr class="my-0" />
<div class="card-body"> <a href="https://bimmersticker.store/" class="btn btn-primary" rel="nofollow" target="_blank">Open</a> <a href="https://dribbble.com/petrstepanov/projects/641848-Bimmer-Sticker-Store" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-dribbble"></i></a> <a href="https://github.com/petrstepanov/bimmersticker-hexo" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-github"></i></a> </div>
</div>
<div class="card">
<div class="img-gradient"> <img src="https://cdn.dribbble.com/users/118393/screenshots/3259670/dribbble_1x.png" class="card-img-top" alt="Otixo Cloud Messenger"> </div>
<div class="card-body">
<h5 class="card-title">Otixo</h5>
<p class="card-text">A messenger with enhanced cloud file sharing capabilities.</p>
<p class="card-text"><code class="text-black-50">Sketch HTML SCSS React Swift</code></p>
</div>
<hr class="my-0" />
<div class="card-body"> <a href="https://otixo.com/" class="btn btn-primary" rel="nofollow" target="_blank">Open</a> <a href="https://dribbble.com/petrstepanov/projects/420471-Otixo" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-dribbble"></i></a> </div>
</div>
<div class="card">
<div class="img-gradient"> <img src="https://cdn.dribbble.com/users/118393/screenshots/2419000/preview_1x.jpg" class="card-img-top" alt="Otixo Cloud Messenger"> </div>
<div class="card-body">
<h5 class="card-title">Lili</h5>
<p class="card-text">Social network focused on sharing lists of things.</p>
<p class="card-text"><code class="text-black-50">Photoshop HTML LESS Angular</code></p>
</div>
<hr class="my-0" />
<div class="card-body"> <a href="https://myli.li/" class="btn btn-primary" rel="nofollow" target="_blank">Open</a> <a href="https://dribbble.com/petrstepanov/projects/420479-Lili-Social-App" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-dribbble"></i></a> </div>
</div>
<div class="card">
<div class="img-gradient"> <img src="img/shots/selimlab.png" class="card-img-top" alt="Bimmer Sticker Store"> </div>
<div class="card-body">
<h5 class="card-title">SelimLab</h5>
<p class="card-text">Wordpress theme for a research group website.</p>
<p class="card-text"><code class="text-black-50">Sketch HTML SCSS Wordpress JS</code> </p>
</div>
<hr class="my-0" />
<div class="card-body"> <a href="https://physics.bgsu.edu/selimlab/" class="btn btn-primary" rel="nofollow" target="_blank">Open</a> <a href="https://dribbble.com/petrstepanov/projects/420477-SelimLab" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-dribbble"></i></a> <a href="https://github.com/petrstepanov/selimtheme" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-github"></i></a> <a href="https://www.figma.com/file/IO67NYIRouL619dwkEf1AxPu/SelimLab" class="btn btn-light ml-2 px-2" rel="nofollow" target="_blank"><img src="img/ionicons/logo-figma.svg" alt="Figma logo" /></a> </div>
</div>
<div class="card">
<div class="img-gradient"> <img src="https://cdn.dribbble.com/users/118393/screenshots/1728757/ios-icon.jpg" class="card-img-top" alt="Bimmer Sticker Store"> </div>
<div class="card-body">
<h5 class="card-title">Maskd</h5>
<p class="card-text">A homepage and identity for anonymous iOS messenger app.</p>
<p class="card-text"><code class="text-black-50">Photoshop HTML LESS JS</code></p>
</div>
<hr class="my-0" />
<div class="card-body"> <a href="https://www.maskd.me/" class="btn btn-primary disabled" rel="nofollow" target="_blank">Open</a> <a href="https://dribbble.com/petrstepanov/projects/420475-Maskd-iOS-App" class="btn btn-light ml-2" rel="nofollow" target="_blank"><i class="icon-font icon-large ion-logo-dribbble"></i></a> </div>
</div>
<div class="card text-center">
<div class="card-body"> <img src="img/ps-monogram-crop.svg" class="w-25 mt-4 mb-3" alt="Petr Stepanov monogram">
<p class="lead mt-3 mb-4">Feel free to check out more of my user interface designs, logos and creative artwork on Dribbble.</p>
<p><a href="https://dribbble.com/petrstepanov" class="btn btn-primary btn-lg" rel="nofollow" target="_blank">View more shots -</a></p>
</div>
</div>
</div>
<h2 class="my-5 pt-4" id="scientific-software">Scientific software</h2>
<p class="mb-4">During my post-doctorate researcher role at the <a href="https://www.catholic.edu/index.html">CUA</a> I was responsible for carrying out Monte Carlo particle simulations in High Energy Physics (HEP). The gold standard simulation toolkit in physics is <a href="https://geant4.web.cern.ch/">Geant4</a>. On the other hand, <a href="https://root.cern.ch/">ROOT</a> framework is utilized for the data analysis and processing. Geant4 and ROOT are massive C++ libraries. Delivery of the production-ready software that incorporates these frameworks requires a proper project setup on a local computer.</p>
<hr />
<div class="row justify-content-center text-center">
<div class="col-12 col-md-8">
<p class="lead mt-4">Please refer to my guidelines on <strong>setting up a ROOT and Geant4-based projects in Eclipse IDE</strong> below:</p>
<p class="mb-4">
<a class="btn btn-primary mx-2 my-2" href="https://docs.google.com/document/d/1Q-ypwku8ZTR53uW4Djy3ANzRnxk1sokEeYrwvJ3JOSE/edit?usp=sharing">On Google Docs (recent)</a><span class="d-none d-sm-inline"> or </span><a class="btn btn-outline-primary mx-2 my-2" href="https://root.cern/blog/debuging-root-scripts-in-eclipse/">On the ROOT Blog</a>
</p>
</div>
</div>
<hr />
<p class="mt-4"> I utilized Geant4 framework to collaborate on the <a href="https://www.bnl.gov/eic/">Electron-Ion Detector (EIC) project</a>. Additionally, I developed a Geant4-based simulation for studying the performance of scintillation materials. The program reconstructs energy deposition, light yield, and detector response.</p>
<div class="row mb-5 justify-content-center">
<figure class="col-12 col-md-10 mb-5"> <img src="static/screenshot-geant4-escape-locations-2.png" class="w-100 h-auto" alt="Geant4 simulation of the particle escape locations" />
<figcaption>Studies of the energy conservation of a Geant4 simulation. Ensuring the incident particle energy equals to the deposited energy and cumulative kinetic energy of the particles that escaped the simulation.</figcaption>
</figure>
<figure class="col-11 col-md-7 order-md-2"> <img src="static/screenshot-geant4-energy-deposition.png" class="w-100 h-auto" style="border-radius: 0.5em" alt="Geant4 visualization of the energy deposition" />
<figcaption class="mt-4">Visualizing the energy deposition in a 3x3 assembly of scintillation crystals with the help of Geant4 scoring meshes.</figcaption>
</figure>
<div class="col-12 col-md-5 order-md-1">
<h5 class="mt-4 mb-3">Glass Prototype Simulation</h5>
<p>A Geant4-based simulation that studies the performance of a novel scintillation material "SciGlass". Simulation reconstructs detector response from the interaction of the scintillation crystals with high energy ionizing particles.</p>
<p>Contributions of the scintillation and Cherenkov-produced light are individually detected. Two types of visible light detectors are supported: Photo-Multiplier tubes (PMT) and Multi-Pixel Photon Counters (MPPC/SiPM). Energy deposition studies in the sensitive part of the detector are carried out.</p>
<p><code class="text-black-50">C++, CMake, Geant4, CERN ROOT framework</code></p>
<p><a href="https://github.com/petrstepanov/geant4-glass" class="btn btn-primary" rel="nofollow" target="_blank">View on GitHub</a></p>
</div>
</div>
<p class="mb-4">My PhD research in physics at <a href="https://www.bgsu.edu/">BGSU</a> was interdisciplinary with computer science. I developed several desktop software products for data analysis and experimental spectra interpretation. I utilized and contributed to the development of the <a href="https://root.cern.ch/" title="CERN ROOT framework">CERN ROOT framework</a>. ROOT ecosystem offers a variety of tools for histogram manipulation, plotting, fitting, and data storage. The framework allows for building standalone graphical user interface (GUI) software. </p>
<div class="row mb-5">
<figure class="col-12 col-md-7"> <img src="static/screenshot-tlist-processor.png" class="w-100 h-auto" alt="TLIST Processor" />
<figcaption>Fitting and subtracting the two-dimensional background from a coincidence Doppler broadening spectrum of aluminum.</figcaption>
</figure>
<div class="col-12 col-md-5">
<h5 class="mt-4 mb-3">TLIST Processor</h5>
<p>Software is designed to process two-dimensional energy spectra and output one-dimensional coincidence broadened Doppler spectrum.</p>
<p>A background fitting and subtraction technique is developed and implemented.</p>
<p><code class="text-black-50">C++, CERN ROOT framework, GNU Automake</code></p>
<p><a href="https://github.com/petrstepanov/tlist-processor" class="btn btn-primary" rel="nofollow" target="_blank">View on GitHub</a></p>
</div>
</div>
<div class="row mb-5">
<figure class="col-md-7 order-md-2"> <img src="static/screenshot-sw-calculator.png" class="w-100 h-auto" alt="SW Calculator" />
<figcaption>Decomposition of a 1D Doppler spectrum into contributions from Fermi electrons, core and valence electrons.</figcaption>
</figure>
<div class="col-md-5 order-md-1">
<h5 class="mt-4 mb-3">SW Calculator</h5>
<p>Program calculates S and W parameters of the 511 keV peak of the annihilation radiation. Software estimates values of the binding electron energies by fitting the CDB spectrum with contributions from e+ annihilation on electrons with different wave functions.</p>
<p>Electrons from the conduction band contribute to the spectrum as an inverted parabola. Upon the shape of the parabola, we calculate Fermi energy.</p>
<p><code class="text-black-50">C++, CERN ROOT framework, GNU Automake</code></p>
<p><a href="https://github.com/petrstepanov/sw-calculator" class="btn btn-primary" rel="nofollow" target="_blank">View on GitHub</a></p>
</div>
</div>
<div class="row mb-5">
<figure class="col-md-7"> <img src="static/screenshot-roopositron.png" class="w-100 h-auto" alt="SW Calculator" />
<figcaption>Simultaneous fitting of three <a href="https://en.wikipedia.org/wiki/Positron_annihilation_spectroscopy">positron lifetime specrtra</a> (PALS) with a fitting model that supports shared fitting parameters.</figcaption>
</figure>
<div class="col-md-5">
<h5 class="mt-4 mb-3">RooPositron</h5>
<p>A flexible terminal-based positron lifetime fitting software. A graphical user interface is in progress.</p>
<p>Software supports deconvolution of lifetime spectra into the conventional multiexponential model as well as trapping model. Supports integration of models with custom fitting parameters.</p>
<p><code class="text-black-50">C++, CERN ROOT framework, GNU Automake</code></p>
<p><a href="https://github.com/petrstepanov/sw-calculator" class="btn btn-primary" rel="nofollow" target="_blank">View on GitHub</a></p>
</div>
</div>
<h2 class="my-5 pt-4" id="publications">Recent publications</h2> <!-- Zotero Bib, American Chemical Society -->
<ul class="list-unstyled">
<li class="mt-2 mb-5">
<p class="lead mb-2">Revealing the Structure of Light Pseudoscalar Mesons at the Electron-Ion Collider. <a class="ml-1" href="./static/publications/Arrington_2021_J._Phys._G_Nucl._Part._Phys._48_075106.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Arrington, J.; Gayoso, C. A.; Barry, P. C.; Berdnikov, V.; Binosi, D.; Chang, L.; Diefenthaler, M.; Ding, M.; Ent, R.; Frederico, T.; Furletova, Y.; Hobbs, T. J.; Horn, T.; Huber, G. M.; Kay, S. J. D.; Keppel, C.; Lin, H.-W.; Mezrag, C.; Montgomery, R.; Pegg, I. L.; Raya, K.; Reimer, P.; Richards, D. G.; Roberts, C. D.; Rodríguez-Quintero, J.; Romanov, D.; Salmè, G.; Sato, N.; Segovia, J.; Stepanov, P.; Tadepalli, A. S.; Trotta, R. L. <em>J. Phys. G: Nucl. Part. Phys.</em> <strong>2021</strong>, <em>48</em> (7), 075106. <a href="https://doi.org/10.1088/1361-6471/abf5c3" class="text-monospace no-wrap">DOI: 10.1088/1361-6471/abf5c3</a>. </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Interaction of positronium with dissolved oxygen in liquids. <a class="ml-1" href="./static/publications/10.1039@C9CP06105C.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, P. S.; Selim, F. A.; Stepanov, S. V.; Bokov, A. V.; Ilyukhina, O. V.; Duplâtre, G.; Byakov, V. M. <em>Physical Chemistry Chemical Physics</em> <strong>2020</strong>, <span class="pl-3"></span><a href="https://doi.org/10.1039/C9CP06105C" class="text-monospace no-wrap">DOI: 10.1039/C9CP06105C</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">A Model for Joint Processing of LT and CDB Spectra of Dielectric Nano-sized Powders. <a class="ml-1" href="./static/publications/1.5135836.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, P. S.; Selim, F. A.; Stepanov, S. V.; Byakov, V. M. <em>AIP Conference Proceedings</em> <strong>2019</strong>, <em>2182</em> (1), 040004. <span class="pl-3"></span><a href="https://doi.org/10.1063/1.5135836" class="text-monospace no-wrap">DOI: 10.1063/1.5135836</a></p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Positron and positronium in Al<sub>2</sub>O<sub></sub> nanopowders. <a class="ml-1" href="./static/publications/1.5135851.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, P. S.; Selim, F. A.; Stepanov, S. V.; Byakov, V. M. <em>AIP Conference Proceedings</em> <strong>2019</strong>, <em>2182</em> (1), 050008. <span class="pl-3"></span><a href="https://doi.org/10.1063/1.5135851" class="text-monospace no-wrap">DOI: 10.1063/1.5135851</a></p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Defects and solarization in YAG transparent ceramics. <a class="ml-1" href="./static/publications/prj-7-5-549.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Zhang, L.; Wu, J.; Stepanov, P.; Haseman, M.; Zhou, T.; Winarski, D.; Saadatkia, P.; Agarwal, S.; Selim, F. A.; Yang, H.; et al. <em>Photonics Research</em> <strong>2019</strong>, <em>7</em> (5), 549-557 <span class="pl-3"></span><a href="https://doi.org/10.1364/PRJ.7.000549" class="text-monospace no-wrap">DOI: 10.1364/prj.7.000549</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Photoconductivity of bulk SrTiO3 single crystals at room temperature. <a class="ml-1" href="./static/publications/mrx_5_1_016202.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a> </p>
<p>Saadatkia, P.; Stepanov, P.; Selim, F. A. <em>Materials Research Express</em> <strong>2018</strong>, <em>5</em> (1), 016202 <span class="pl-3"></span><a href="https://doi.org/10.1088/2053-1591/aaa094" class="text-monospace no-wrap">DOI: 10.1088/2053-1591/aaa094</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Track Effects in Positronium Formation. <a class="ml-1" href="./static/publications/app132z5p04.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, S.; Byakov, V.; Duplâtre, G.; Stepanov, P.; Bokov, A. <em>Acta Physica Polonica A</em> <strong>2017</strong>, <em>132</em> (5), 1461-1466 <span class="pl-3"></span><a href="https://doi.org/10.12693/APhysPolA.132.1461" class="text-monospace no-wrap">DOI: 10.12693/APhysPolA.132.1461</a></p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Developing new routine for processing two-dimensional coincidence doppler energy spectra and evaluation of electron subsystem properties in metals. <a class="ml-1" href="./static/publications/app132z5p43.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, P.; Stepanov, S.; Byakov, V.; Selim, F. <em>Acta Physica Polonica A</em> <strong>2017</strong>, <em>132</em> (5), 1628-1633 <span class="pl-3"></span><a href="https://doi.org/10.12693/APhysPolA.132.1628" class="text-monospace no-wrap">DOI: 10.12693/APhysPolA.132.1628</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">ZnO Luminescence and scintillation studied via photoexcitation, X-ray excitation, and gamma-induced positron spectroscopy. <a class="ml-1" href="./static/publications/10.1038@srep31238.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Ji, J.; Colosimo, A. M.; Anwand, W.; Boatner, L. A.; Wagner, A.; Stepanov, P. S.; Trinh, T. T.; Liedke, M. O.; Krause-Rehberg, R.; Cowan, T. E.; et al. <em>Scientific reports</em> <strong>2016</strong>, <em>6</em> (1), 31238 <span class="pl-3"></span><a href="https://doi.org/10.1038/srep31238" class="text-monospace no-wrap">DOI: 10.1038/srep31238</a></p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Premelting as studied by positron annihilation and emission Mössbauer spectroscopies. <a class="ml-1" href="./static/publications/Stepanov_2016_J._Phys.__Conf._Ser._674_012018.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, S. V.; Byakov, V. M.; Zvezhinskiy, D. S.; Duplâtre, G.; Dubov, L. Y.; Stepanov, P. S.; Perfiliev, Y. D.; Kulikov, L. A. <em>Journal of Physics: Conference Series</em> <strong>2016</strong>, <em>674</em>, 012018 <span class="pl-3"></span><a href="https://doi.org/10.1088/1742-6596/674/1/012018" class="text-monospace no-wrap">DOI: 10.1088/1742-6596/674/1/012018</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Scintillation of Un-doped ZnO Single Crystals. <a class="ml-1" href="./static/publications/colosimo2016.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Colosimo, A. M.; Ji, J.; Stepanov, P. S.; Boatner, L. A.; Selim, F. A <em>MRS Advances</em> <strong>2016</strong>, <em>1</em> (2), 121-126 <span class="pl-3"></span><a href="https://doi.org/10.1557/adv.2015.60" class="text-monospace no-wrap">DOI: 10.1557/adv.2015.60</a></p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">Early processes in positron and positronium chemistry: possible scavenging of epithermal e by nitrate ion in aqueous solutions. <a class="ml-1" href="./static/publications/Stepanov_2015_J._Phys.__Conf._Ser._618_012003.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a></p>
<p>Stepanov, S. V.; Byakov, V. M.; Duplâtre, G.; Zvezhinskiy, D. S.; Stepanov, P. S.; Zaluzhnyi, A. G. <em>Journal of Physics: Conference Series</em> <strong>2015</strong>, <em>618</em>, 012003 <span class="pl-3"></span><a href="https://doi.org/10.1088/1742-6596/618/1/012003" class="text-monospace no-wrap">DOI: 10.1088/1742-6596/618/1/012003</a> </p>
</li>
<li class="mt-2 mb-5">
<p class="lead mb-2">The use of positron spectroscopy for revealing the nanosized structures in liquid mixtures. Identification of n-propanol nanoagglomerates in aqueous solutions. <a class="ml-1" href="./static/publications/14PSte_FizKhim_en.pdf" rel="nofollow" target="_blank" title="View publication PDF"><i class="icon-font ion-md-download"></i></a> </p>
<p>Stepanov, P. S.; Byakov, V. M.; Zaluzhnyi, A. G. <em>Russian Journal of Physical Chemistry A</em> <strong>2014</strong>, <em>88</em> (4), 685-690 <span class="pl-3"></span><a href="https://doi.org/10.1134/S003602441404027X" class="text-monospace no-wrap">DOI: 10.1134/s003602441404027x</a></p>
</li>
</ul>
<p><a href="https://scholar.petrstepanov.com" class="btn btn-primary btn-lg" target="_blank">View more publications</a></p>
<h2 class="my-5 pt-4" id="conferences">Conferences</h2>
<ul class="list-unstyled">
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">18th International Conference on Positron Annihilation (ICPA-18)</h3>
<p class="h6 text-muted">@Orlando, FL, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2018-09">Aug 2018</time></div>
</div>
<p>Oral talk “Positions and Ps in Al2O3 Nanopowders”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">International Workshop on Physics with Positrons (JPos17)</h3>
<p class="h6 text-muted">@Jefferson Lab, Newport News, VA, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2017-10">Sept 2017</time></div>
</div>
<p>Poster “A routine of background subtraction from two-dimensional Doppler broadened spectra”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">12th International Workshop on Positron and Positronium Chemistry (PPC12)</h3>
<p class="h6 text-muted">@Maria Curie-Sklodowska University, Lublin, Poland</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2017-09">Aug 2017</time></div>
</div>
<p>Poster “Developing new routine for processing two-dimensional coincidence Doppler energy spectra”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">Ohio Photochemical Society Meeting (Oops)</h3>
<p class="h6 text-muted">@Maumee Bay Lodge & Conference Center, Maumee, OH, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2017-05">May 2017</time></div>
</div>
<p>Poster “Developing new routine for background subtraction in two-dimensional coincidence Doppler broadening spectroscopy”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">58th Electronic Materials Conference (EMC)</h3>
<p class="h6 text-muted">@University of Delaware, Newark, DE, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2016-06">Jun 2016</time></div>
</div>
<p>Oral talk “High-Sensitivity Measurements of Defects in ZnO by Means of Digital Coincidence Doppler Broadening of Positron Annihilation Spectroscopy”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">Annual Spring Meeting of the APS Ohio-Region</h3>
<p class="h6 text-muted">@University of Delaware, Newark, DE, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2016-04">Apr 2016</time></div>
</div>
<p>Oral talk “Identification of chemical environment of defects in ZnO by means of digital coincidence Doppler broadening of positron annihilation radiation”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">Ohio Inorganic Weekend</h3>
<p class="h6 text-muted">@Bowling Green State University, OH, USA</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2015-11">Nov 2015</time></div>
</div>
<p>Poster “Approaching Structural Defect Characterization and their Chemical Identification by Means of Coincidence Doppler Broadening of Annihilation Radiation”.</p>
</li>
<li class="mt-3 mb-5">
<div class="row mb-3">
<div class="col-12 col-md-8">
<h3 class="h5">41st Polish Seminar on Positron Annihilation (PSPA-13)</h3>
<p class="h6 text-muted">@Maria Curie-Sklodowska University, Lublin, Poland</p>
</div>
<div class="col-12 col-md-4 text-md-right mb-2 text-muted"><time datetime="2013-09">Sep 2013</time></div>
</div>
<p>Oral talk “Application of positron spectroscopy for detection of nanostructures in alcohol―aqueous mixtures”.</p>
</li>
</ul>
<h2 class="my-5 pt-4" id="networks">Professional networks</h2>
<ul class="list-unstyled">
<li class="mt-3 mb-4 d-flex"> <span class="tab-icon flex-shrink-0"><ion-icon name="logo-dribbble"></ion-icon></span> <span>Check out my <a href="https://dribbble.com/petrstepanov" rel="me" target="_blank">portfolio on Dribbble</a>.</span> </li>
<li class="mt-3 mb-4 d-flex"> <span class="tab-icon flex-shrink-0"><ion-icon name="logo-github"></ion-icon></span> <span>Look up some of my <a href="https://github.com/petrstepanov/" rel="me" target="_blank">code on GitHub</a>.</span> </li>
<li class="mt-3 mb-4 d-flex"> <span class="tab-icon flex-shrink-0"><ion-icon name="logo-linkedin"></ion-icon></span> <span>Find my professional contacts <a href="https://www.linkedin.com/in/petrstepanov/en/" rel="me" target="_blank">on Linkedin</a>.</span> </li>
<li class="mt-3 mb-4 d-flex"> <span class="tab-icon flex-shrink-0"><ion-icon name="ribbon-outline"></ion-icon></span> <span>Get familiar with my <a href="https://www.researchgate.net/profile/Petr_Stepanov2" rel="me" target="_blank">scientific carreer on ResearchGate</a>.</span> </li>
<li class="mt-3 mb-4 d-flex"> <span class="tab-icon flex-shrink-0"><ion-icon name="school-outline"></ion-icon></span> <span>Skim through list of my <a href="https://scholar.petrstepanov.com" rel="me" target="_blank">publications on Google Scholar</a>.</span> </li>
</ul>
<h2 class="my-5 pt-4">Interests</h2>
<p class="mt-4"><span class="tab-emoji">💻</span> Linux and open-source software.</p>
<ul class="my-list my-2">
<li class="mb-2"> Hosting an open-source project for <a href="https://github.com/petrstepanov/gnome-macos-remap">keyboard remapping on Linux</a> (300+ stars on GitHub). </li>
<li class="mb-2"> Contributing to the C++ open source framework ROOT. Submitted multiple bug reports. Created two shared libraries to facilitate data analysis: <a href="https://petrstepanov.com/root-canvas-helper/">CanvasHelper</a> and <a href="https://petrstepanov.com/root-utils/">RootUtils</a>. </li>
</ul>
<p class="mt-4"><span class="tab-emoji">🛠</span> Working on cars and motorcycles.</p>
<ul class="my-list my-2">
<li class="mb-2"> Volunteer mechanic and fabricator at a non-profit automotive repair shop in Oregon City, OR.</li>
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<h2 class="mb-5">What's next?</h2>
<p class="lead">Currently I am looking for new full-time job opportunities. I am a permanent resident and can lawfully work in the United States.</p> <a class="btn btn-primary btn-lg mt-4 mb-5" href="mailto:stepanovps@gmail.com">Get in touch</a>
<p class="lead"><strong>My inbox is always open</strong>. Whether for a potential project or just to say hi, I'll try my best to answer your email!</p>
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