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      "content": "<h2>Format of data</h2>\r\n<p>Information about position of straw tubes is kept in separate file wires.csv, it has 4482 lines with following information:</p>\r\n<ul>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">wire_id - zero-based index of straw tubes</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">wire_rho - distance to stopping target</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">wire_phi - phi angle in the plane perpendicular to beam</span></li>\r\n</ul>\r\n<p>Each event is a 'snapshot' of detector, it consists of data taken from all 4482 wires: energy and relative time.</p>\r\n<p>Event is written only when hodoscope detects particle. Relative time is difference between time when straw tube detected energy and time of hodoscope.</p>\r\n<p>Data in train.csv is organized as following:</p>\r\n<ul>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">event_id - zero-based index of event</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">wire_id - zero-based index of wire</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">global_id - zero-based identifier for each entry in file</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">energy - energy deposited at wire </span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">relative_time = ( time of readout - hodoscope time)</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">label (0 = not activated, 1=signal hit, 2=background hit)</span></li>\r\n</ul>\r\n<p>Wire with zero energy deposition is not activated.</p>\r\n<p>test.csv has the same structure, but there is no label column (which you have to predict).</p>",
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      "name": "Description",
      "content": "<p><a href=\"http://comet.kek.jp/Introduction.html\">COMET</a> is an experiment being constructed at the J-PARC proton beam laboratory in Japan. It will search for coherent neutrino-less conversion of a muon to an electron, μ- + N(A,Z) → e- + N(A,Z). This process breaks the law of lepton conservation. If detected, it will be a signal of new physics.</p>\r\n<p>The previous upper limit for this decay was set [5] by the SINDRUM II experiment in 2006. COMET is designed to have 10,000 times better sensitivity.</p>\r\n<h2>Cylindrical Drift Chamber</h2>\r\n<p>The COMET experiment is looking for muon to electron conversion, μ- + N → e- + N. COMET Phase-I will the Cylindrical Drift Chamber as the primary detector for physics measurements. Specifically, the momentum of resulting particles will be measured using the CyDet, which is a cylindrical wire array detector.</p>\r\n<p>The particles flying out of muon-stopping target and registered by the CyDet. Among those we are interested in tracks left by electrons with specific energy, which are produced by muon to electron conversion.</p>\r\n<p>The CyDet consists of 4482 sensitive wires organized in 18 layers. Each wire measures the energy deposited by a passing charged particle. Within each of the layers, the wires have same distance to the stopping target and stereometry angle. </p>\r\n<p><img src=\"https://storage.googleapis.com/kaggle-media/competitions/inclass/4520/media/comet_3d.gif\" alt=\"Scheme of COMET cylindrical detector\" width=\"600\" height=\"431\" /></p>\r\n<p>There is magnetic field in the detector, which causes electron moves in helical path as shown below. This electron deposits energy in the wires close to the flight path. The radius of helix is proportional to transverse momentum of the electron:</p>\r\n<p>R = p_t/(eB)</p>\r\n<p>where p_t is transverse momentum, B is strength of magnetic field, e is charge of electron.</p>\r\n<p> <img src=\"https://storage.googleapis.com/kaggle-media/competitions/inclass/4520/media/COMEThelixing.png\" alt=\"Trajectory of electron in margetic field\" width=\"400\" height=\"447\" /></p>\r\n<p>The energy deposited on each wire is measured at the end plate of the cylindrical detector. An example of the resulting signal event can be seen below, where blue dots are background hits and red are hits from signal electrons:</p>\r\n<p><img src=\"https://storage.googleapis.com/kaggle-media/competitions/inclass/4520/media/COMET2dprojection.png\" alt=\"Energy depositions in COMET\" width=\"600\" height=\"596\" /></p>\r\n<h2>Starting</h2>\r\n<p>Check out starter kit to make first submission and explore the data!</p>\r\n<h2>More details</h2>\r\n<ol>\r\n<li><a href=\"http://comet.kek.jp\">COMET</a> official site</li>\r\n<li><a href=\"http://comet.kek.jp/Documents_files/comet-cdr-v1.0.pdf\">COMET conceptual design report</a></li>\r\n<li><a href=\"https://nplus1.ru/news/2015/05/29/reareevents\">Раритеты микромира</a>  - if you aren't deep into HEP, this article in russian is probably good starting point to understand what is COMET about. </li>\r\n<li><a href=\"http://www-physics.lbl.gov/seminars/old/LBNL2014KUNO.pdf\">COMET presentation</a></li>\r\n<li>\r\n<p><a href=\"http://www.researchgate.net/publication/226763791_A_search_for_-e_conversion_in_muonic_gold\">A search for μ-e conversion in muonic gold</a></p>\r\n</li>\r\n</ol>\r\n<h2>Important note</h2>\r\n<p>Datasets available for this challenge are results of preliminary Monte Carlo simulation. They don't completely represent properties of COMET's detector and thus cannot be used to estimate final properties of tracking system, but are appropriate to test different approaches to tracking.</p>\r\n<h2>Acknowledgements</h2>\r\n<p>We thank COMET collaboration (and specially Chen WU) for allowing us to use this dataset.</p>",
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      "name": "Evaluation",
      "content": "<p>Evaluation metric for this competition is area under <a href=\"https://en.wikipedia.org/wiki/Receiver_operating_characteristic\">ROC curve</a>.</p>\r\n<p>Measured only quality of discrimination of signal hits vs background hits.</p>\r\n<h2>Submission Format</h2>\r\n<p><strong>For every activated wire in every event</strong>, submission files should contain two columns: global_id, prediction.</p>\r\n<p>Prediction for signal hits should be higher than for background (to get high quality).</p>\r\n<p>The file should contain a header and have the following format:</p>\r\n<pre>global_id,prediction\r\n7619403,0.1<br />7619407,0.3\r\netc.\r\n</pre>\r\n<p>Pay attention, that only activated wires (with energy &gt; 0) should be submitted.</p>",
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    {
      "name": "rules",
      "content": "\r\n\t<!-- Begin Base Rules -->\r\n    <h3>One account per participant</h3>\r\n    <p>You cannot sign up to Kaggle from multiple accounts and therefore you cannot submit from multiple accounts.</p>\r\n    <h3>No private sharing outside teams</h3>\r\n    <p>\r\n        Privately sharing code or data outside of teams is not permitted.\r\n        It's okay to share code if made available to all participants on the forums.\r\n    </p>\r\n    <h3>Team Mergers</h3>\r\n    <p>\r\n        Team mergers are allowed and can be performed by the team leader. In order to merge, the combined team must have a total submission count less than or equal to the maximum allowed as of the merge date. The maximum allowed is the number of submissions per day multiplied by the number of days the competition has been running.<br/>\r\n    </p>\r\n\r\n    <h3>Team Limits</h3>\r\n    <p>The maximum size of a team is 2 participants.</p>\r\n    <h3>Submission Limits</h3>\r\n    <p>You may submit a maximum of 20 entries per day.</p>\r\n    <p>You may select up to 2 final submissions for judging.</p>\r\n    <h3>Competition Timeline</h3>\r\n    <p>Start Date: <strong>8/25/2015 7:00 PM UTC</strong></p>\r\n    <p>Merger Deadline: <strong>None</strong></p>\r\n    <p>Entry Deadline: <strong>None</strong></p>\r\n    <p>End Date: <strong>8/30/2015 2:45 PM UTC</strong></p>\r\n\t<!-- End Base Rules -->\r\n<ol>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">Special prizes for top-3 participants!</span></li>\r\n<li><span style=\"font-size: 1em; line-height: 1.5em;\">All discussion/cooperation/sharing shall be done using forum of competition.</span></li>\r\n</ol>",
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