It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://blog-463823129089.mit-edu.top/post/2579360184

  1. <!doctype html>
  2. <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" prefix="og: http://ogp.me/ns#">
  3.  
  4.  <head>
  5.    <meta charset="utf-8">
  6.    <meta name="applicable-device" content="pc,mobile">
  7.    <meta name="viewport" content="width=device-width, initial-scale=1">
  8.    <title>Multi-Objective Reinforcement Learning for Player-Centric AI Design #347623367698 (2025-02-02)</title>
  9.    <link rel="canonical" href="https://blog-463823129089.mit-edu.top/post/2579360184">
  10.    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap">
  11.    <link rel="stylesheet" href="https://x.mit-edu.top/static/css/style.css">
  12.    <script src="https://x.mit-edu.top/static/js/lazysizes.min.js" async></script>
  13.    <link rel="shortcut icon" href="/favicon.ico">
  14.    <!-- Open Graph Metadata -->
  15.    <meta property="og:type" content="article" />
  16.    <meta property="og:title" content="Multi-Objective Reinforcement Learning for Player-Centric AI Design" />
  17.    <meta property="og:description" content="Multi-Objective Reinforcement Learning for Player-Centric AI Design #347623367698 (2025-02-02)" />
  18.    <meta property="og:url" content="https://blog-463823129089.mit-edu.top/post/2579360184" />
  19.    <meta property="og:site_name" content="mit-edu.top" />
  20.    <meta property="og:image" content="https://x.mit-edu.top/static/images/post/15.jpg" />
  21.    <meta property="og:article:published_time" content="2025-02-01T17:54:43Z" />
  22.    <meta property="og:article:author" content="Dr. Elizabeth Martinez" />
  23.    <meta property="og:article:section" content="mit-edu.top" />
  24.    <meta property="og:article:tag" content="Games, Mobile Games, Video Games" />
  25.    <!-- Schema.org -->
  26.    <script type="application/ld+json">{
  27.            "@context": "https://schema.org",
  28.            "@type": "ScholarlyArticle",
  29.            "headline": "Multi-Objective Reinforcement Learning for Player-Centric AI Design #347623367698 (2025-02-02)",
  30.            "author": {
  31.                "@type": "Person",
  32.                "name": "Dr. Elizabeth Martinez",
  33.                "affiliation": {
  34.                    "@type": "Organization",
  35.                    "name": "mit-edu.top"
  36.                },
  37.                "url": "https://blog-463823129089.mit-edu.top/post/2579360184"
  38.            },
  39.            "datePublished": "2025-02-01T17:54:43Z",
  40.            "image": "https://x.mit-edu.top/static/images/post/15.jpg",
  41.            "journal": {
  42.                "@type": "Periodical",
  43.                "name": "mit-edu.top",
  44.                "issn": "10.1069/347623367698"
  45.            },
  46.            "publisher": {
  47.                "@type": "Organization",
  48.                "name": "mit-edu.top",
  49.                "url": "https://blog-463823129089.mit-edu.top"
  50.            },
  51.            "doi": "347623367698",
  52.            "abstract": "Multi-Objective Reinforcement Learning for Player-Centric AI Design #347623367698 (2025-02-02)",
  53.            "citation": {
  54.                "@type": "CreativeWork",
  55.                "name": "Multi-Objective Reinforcement Learning for Player-Centric AI Design",
  56.                "author": "Dr. Elizabeth Martinez",
  57.                "datePublished": "2025-02-01T17:54:43Z",
  58.                "url": "https://blog-463823129089.mit-edu.top/post/2579360184"
  59.            }
  60.        }
  61.    </script>
  62. </head>
  63.  
  64. <body>
  65.    <div class="site-mobile-menu site-navbar-target">
  66.        <div class="site-mobile-menu-header">
  67.            <div class="site-mobile-menu-close">
  68.                <span class="icofont-close js-menu-toggle"></span>
  69.            </div>
  70.        </div>
  71.        <div class="site-mobile-menu-body"></div>
  72.    </div>
  73.    <nav class="site-nav">
  74.        <div class="container">
  75.            <div class="site-navigation">
  76.                <div class="row">
  77.                    <div class="col-md-6 text-center order-1 order-md-2 mb-3 mb-md-0">
  78.                        <a href="https://blog-463823129089.mit-edu.top" class="logo m-0 text-uppercase">mit-edu.top</a>
  79.                    </div>
  80.                    <div class="col-md-3 order-3 order-md-1">
  81.                    </div>
  82.                </div>
  83.            </div>
  84.        </div>
  85.    </nav>
  86.    <div class="section post-section pt-5">
  87.        <div class="container">
  88.            <div class="row justify-content-center">
  89.                <div class="col-lg-8">
  90.                    <div class="text-center">
  91.                        <img src="https://x.mit-edu.top/static/images/user/4.jpg" alt="Multi-Objective Reinforcement Learning for Player-Centric AI Design" title="Multi-Objective Reinforcement Learning for Player-Centric AI Design" class="author-pic img-fluid rounded-circle mx-auto">
  92.                    </div>
  93.                    <span class="d-block text-center">Elizabeth Martinez</span>
  94.                    <span class="date d-block text-center small text-uppercase text-black-50 mb-5">2025-02-02</span>
  95.                    <h2 class="heading text-center">Multi-Objective Reinforcement Learning for Player-Centric AI Design</h2>
  96.                    <p class="lead mb-4 text-center">Thanks to Elizabeth Martinez for contributing the article "Multi-Objective Reinforcement Learning for Player-Centric AI Design".
  97.                    </p>
  98.                    <img src="https://x.mit-edu.top/static/images/post/15.jpg" alt="Multi-Objective Reinforcement Learning for Player-Centric AI Design" title="Multi-Objective Reinforcement Learning for Player-Centric AI Design" class="img-fluid rounded mb-4 lazyload">
  99.                    <p>This paper examines the growth and sustainability of mobile esports within the broader competitive gaming ecosystem. The research investigates the rise of mobile esports tournaments, platforms, and streaming services, focusing on how mobile games like League of Legends: Wild Rift, PUBG Mobile, and Free Fire are becoming major players in the esports industry. Drawing on theories of sports management, media studies, and digital economies, the study explores the factors contributing to the success of mobile esports, such as accessibility, mobile-first design, and player demographics. The research also considers the future challenges of mobile esports, including monetization, player welfare, and the potential for integration with traditional esports leagues.</p>
  100. <p>This paper explores the increasing integration of social media features in mobile games, such as in-game sharing, leaderboards, and social network connectivity. It examines how these features influence player behavior, community engagement, and the overall gaming experience. The research also discusses the benefits and challenges of incorporating social elements into games, particularly in terms of user privacy, data sharing, and online safety.</p>
  101. <p>This research applies behavioral economics theories to the analysis of in-game purchasing behavior in mobile games, exploring how psychological factors such as loss aversion, framing effects, and the endowment effect influence players' spending decisions. The study investigates the role of game design in encouraging or discouraging spending behavior, particularly within free-to-play models that rely on microtransactions. The paper examines how developers use pricing strategies, scarcity mechanisms, and rewards to motivate players to make purchases, and how these strategies impact player satisfaction, long-term retention, and overall game profitability. The research also considers the ethical concerns associated with in-game purchases, particularly in relation to vulnerable players.</p>
  102. <p>The storytelling in video games has matured into an art form, offering players complex narratives filled with rich characters, moral dilemmas, and emotionally resonant experiences that rival those found in literature and cinema. Players are no longer passive consumers but active participants in interactive narratives, shaping the outcome of stories through their choices and actions. This interactive storytelling blurs the line between player and protagonist, creating deeply personal and immersive narratives that leave a lasting impact.</p>
  103. <p>This study explores the integration of augmented reality (AR) technologies in mobile games, examining how AR enhances user engagement and immersion. It discusses technical challenges, user acceptance, and the future potential of AR in mobile gaming.</p>
  104.  
  105.                    <p>
  106.                    <a href="/redirect/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">Link</a>
  107.                    </p>
  108.                    <p><a href="https://www.linegames.org/" target="_blank" class="custom-link">External link</a>
  109. <a href="https://www.iliiili.com/" target="_blank" class="custom-link">External link</a>
  110. <a href="https://www.digwow.net/" target="_blank" class="custom-link">External link</a>
  111. <a href="https://www.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  112. <a href="https://www.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  113. <a href="https://173673838722-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  114. <a href="https://188632406837-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  115. <a href="https://459720237595-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  116. <a href="https://888760079832-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  117. <a href="https://182866611684-gov.iliiili.com/" target="_blank" class="custom-link">External link</a>
  118. <a href="https://617377866632-gov.digwow.net/" target="_blank" class="custom-link">External link</a>
  119. <a href="https://749723941227-gov.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  120. <a href="https://988147508245-gov.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  121. <a href="https://021695879842-gov-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  122. <a href="https://146379167072-gov-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  123. <a href="https://733557160330-gov-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  124. <a href="https://818803028755-gov-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  125. <a href="https://662460643009-edu.iliiili.com/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  126. <a href="https://815948930811-edu.digwow.net/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  127. <a href="https://113998555792-edu.free-giftcodes.com/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  128. <a href="https://767167048633-edu.gifthub.com.ru/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  129. <a href="https://536617739028-gov.iliiili.com/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  130. <a href="https://983553839555-gov.digwow.net/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  131. <a href="https://250113477038-gov.free-giftcodes.com/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  132. <a href="https://712715513979-gov.gifthub.com.ru/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  133. <a href="https://link.naver.com/bridge?262218743755&amp;url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  134. <a href="https://link.naver.com/bridge?193806777949&amp;url=https://naver193806777949-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  135. <a href="https://link.naver.com/bridge?401899725046&amp;url=https://naver401899725046-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  136. <a href="https://link.naver.com/bridge?821206716006&amp;url=https://naver821206716006-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  137. <a href="https://link.naver.com/bridge?784589439619&amp;url=https://naver784589439619-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  138. <a href="https://link.naver.com/bridge?582096779899&amp;url=https://naver582096779899-gov.digwow.net" target="_blank" class="custom-link">External link</a>
  139. <a href="https://link.naver.com/bridge?571172751209&amp;url=https://naver571172751209-gov.iliiili.com" target="_blank" class="custom-link">External link</a>
  140. <a href="https://link.naver.com/bridge?152014063272&amp;url=https://naver152014063272-gov.1717173.xyz" target="_blank" class="custom-link">External link</a>
  141. <a href="https://link.naver.com/bridge?959838896004&amp;url=https://naver959838896004-gov.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  142. <a href="https://link.naver.com/bridge?289309324526&amp;url=https://naver289309324526-gov-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  143. <a href="https://link.naver.com/bridge?023350545539&amp;url=https://naver023350545539-gov-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  144. <a href="https://link.naver.com/bridge?418019448479&amp;url=https://naver418019448479-gov-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  145. <a href="https://link.naver.com/bridge?311874577802&amp;url=https://naver311874577802-gov-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  146. <a href="https://blog-967520462374.gifthub.news/" target="_blank" class="custom-link">External link</a>
  147. <a href="https://blog-318156197284.jp-edu.sbs/" target="_blank" class="custom-link">External link</a>
  148. <a href="https://blog-631322619361.kr-edu.sbs/" target="_blank" class="custom-link">External link</a>
  149. <a href="https://blog-318655086802.krlinkedin.sbs/" target="_blank" class="custom-link">External link</a>
  150. <a href="https://blog-411240614846.mit-edu.sbs/" target="_blank" class="custom-link">External link</a>
  151. <a href="https://blog-017044185941.mit-edu.buzz/" target="_blank" class="custom-link">External link</a>
  152. <a href="https://blog-440120372597.mit-edu.tech/" target="_blank" class="custom-link">External link</a>
  153. <a href="https://blog-658043644358.mit-edu.site/" target="_blank" class="custom-link">External link</a>
  154. <a href="https://blog-866460515537.mit-edu.top/" target="_blank" class="custom-link">External link</a>
  155. <a href="https://blog-665924680584.usa-gov.top/" target="_blank" class="custom-link">External link</a>
  156. <a href="https://research-859394171818.mit-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  157. <a href="https://research-960423280782.harvard-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  158. <a href="https://research-251300895724.stanford-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  159. <a href="https://research-242423320373.cambridge-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  160. <a href="https://research-601780005145.berkeley-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  161. <a href="https://research-224797221574.oxford-edu.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  162. <a href="https://research-906933204472-edu.wwv.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  163. <a href="https://research-572096619099-edu.sean.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  164. <a href="https://research-821978368062-edu.line.pp.ua/?url=https://blog-463823129089.mit-edu.top/post/2579360184" target="_blank" class="custom-link">External link</a>
  165. </p>
  166.                    <div class="row mt-5 pt-5 border-top">
  167.                    </div>
  168.                </div>
  169.            </div>
  170.        </div>
  171.    </div>
  172.    <div class="section pb-0">
  173.        <div class="container">
  174.            <div class="row">
  175.                <div class="col-lg-12">
  176.                    <h2 class="heading">Related</h2>
  177.                </div>
  178.            </div>
  179.            <div class="row justify-content-center">
  180.                <div class="col-lg-12">
  181.                    <div class="post-entry d-md-flex small-horizontal mb-5">
  182.                        <div class="me-md-5 thumbnail mb-3 mb-md-0">
  183.                            <a href="https://blog-463823129089.mit-edu.top/post/6980753142">
  184.                            <img src="https://x.mit-edu.top/static/images/post/15.jpg" alt="Designing Games for Accessibility: A Neurodiverse Perspective" title="Designing Games for Accessibility: A Neurodiverse Perspective" class="img-fluid lazyload">
  185.                            </a>
  186.                        </div>
  187.                        <div class="content">
  188.                            <div class="post-meta mb-3">
  189.                                <a href="https://blog-6980753142.mit-edu.top/post/6980753142/" target="_blank">
  190.                                <span class="date">2025-02-02</span>
  191.                                </a>
  192.                            </div>
  193.                            <h2 class="heading"><a href="https://blog-463823129089.mit-edu.top/post/6980753142">Designing Games for Accessibility: A Neurodiverse Perspective</a></h2>
  194.                            <p class="info">This research explores the integration of virtual reality (VR) technologies into mobile games and investigates its psychological and physiological effects on players. The study examines how VR can enhance immersion, presence, and player agency within mobile game environments, particularly in genres like action, horror, and simulation games. Drawing from cognitive neuroscience and human factors research, the paper analyzes the impact of VR-induced experiences on cognitive load, emotional responses, and physical well-being, such as motion sickness or eye strain. The paper also explores the challenges of VR integration on mobile platforms, including hardware limitations, user comfort, and accessibility.</p>
  195.                            <a href="https://blog-463823129089.mit-edu.top/post/6980753142" class="post-author d-flex align-items-center">
  196.                                <div class="author-pic">
  197.                                    <img src="https://x.mit-edu.top/static/images/user/4.jpg" alt="Designing Games for Accessibility: A Neurodiverse Perspective" title="Designing Games for Accessibility: A Neurodiverse Perspective" class="lazyload">
  198.                                </div>
  199.                                <div class="text">
  200.                                    <strong>Martha Perry</strong>
  201.                                    <span>2025-02-02 published post</span>
  202.                                </div>
  203.                            </a>
  204.                        </div>
  205.                    </div>
  206.                </div>
  207.                <div class="col-lg-12">
  208.                    <div class="post-entry d-md-flex small-horizontal mb-5">
  209.                        <div class="me-md-5 thumbnail mb-3 mb-md-0">
  210.                            <a href="https://blog-463823129089.mit-edu.top/post/8024319567">
  211.                            <img src="https://x.mit-edu.top/static/images/post/14.jpg" alt="The Influence of Social Leaderboards on Player Retention in Mobile Games" title="The Influence of Social Leaderboards on Player Retention in Mobile Games" class="img-fluid lazyload">
  212.                            </a>
  213.                        </div>
  214.                        <div class="content">
  215.                            <div class="post-meta mb-3">
  216.                                <a href="https://blog-8024319567.mit-edu.top/post/8024319567/" target="_blank">
  217.                                <span class="date">2025-02-02</span>
  218.                                </a>
  219.                            </div>
  220.                            <h2 class="heading"><a href="https://blog-463823129089.mit-edu.top/post/8024319567">The Influence of Social Leaderboards on Player Retention in Mobile Games</a></h2>
  221.                            <p class="info">This paper explores the increasing integration of social media features in mobile games, such as in-game sharing, leaderboards, and social network connectivity. It examines how these features influence player behavior, community engagement, and the overall gaming experience. The research also discusses the benefits and challenges of incorporating social elements into games, particularly in terms of user privacy, data sharing, and online safety.</p>
  222.                            <a href="https://blog-463823129089.mit-edu.top/post/8024319567" class="post-author d-flex align-items-center">
  223.                                <div class="author-pic">
  224.                                    <img src="https://x.mit-edu.top/static/images/user/17.jpg" alt="The Influence of Social Leaderboards on Player Retention in Mobile Games" title="The Influence of Social Leaderboards on Player Retention in Mobile Games" class="lazyload">
  225.                                </div>
  226.                                <div class="text">
  227.                                    <strong>Frances Long</strong>
  228.                                    <span>2025-02-02 published post</span>
  229.                                </div>
  230.                            </a>
  231.                        </div>
  232.                    </div>
  233.                </div>
  234.                <div class="col-lg-12">
  235.                    <div class="post-entry d-md-flex small-horizontal mb-5">
  236.                        <div class="me-md-5 thumbnail mb-3 mb-md-0">
  237.                            <a href="https://blog-463823129089.mit-edu.top/post/0528479163">
  238.                            <img src="https://x.mit-edu.top/static/images/post/13.jpg" alt="The Intersection of Gender and Game Mechanics: A Meta-Analytic Approach" title="The Intersection of Gender and Game Mechanics: A Meta-Analytic Approach" class="img-fluid lazyload">
  239.                            </a>
  240.                        </div>
  241.                        <div class="content">
  242.                            <div class="post-meta mb-3">
  243.                                <a href="https://blog-0528479163.mit-edu.top/post/0528479163/" target="_blank">
  244.                                <span class="date">2025-02-02</span>
  245.                                </a>
  246.                            </div>
  247.                            <h2 class="heading"><a href="https://blog-463823129089.mit-edu.top/post/0528479163">The Intersection of Gender and Game Mechanics: A Meta-Analytic Approach</a></h2>
  248.                            <p class="info">Gaming events and conventions serve as epicenters of excitement and celebration, where developers unveil new titles, showcase cutting-edge technology, host competitive tournaments, and connect with fans face-to-face. Events like E3, Gamescom, and PAX are not just gatherings but cultural phenomena that unite gaming enthusiasts in shared anticipation, excitement, and camaraderie.</p>
  249.                            <a href="https://blog-463823129089.mit-edu.top/post/0528479163" class="post-author d-flex align-items-center">
  250.                                <div class="author-pic">
  251.                                    <img src="https://x.mit-edu.top/static/images/user/2.jpg" alt="The Intersection of Gender and Game Mechanics: A Meta-Analytic Approach" title="The Intersection of Gender and Game Mechanics: A Meta-Analytic Approach" class="lazyload">
  252.                                </div>
  253.                                <div class="text">
  254.                                    <strong>James Williams</strong>
  255.                                    <span>2025-02-02 published post</span>
  256.                                </div>
  257.                            </a>
  258.                        </div>
  259.                    </div>
  260.                </div>
  261.            </div>
  262.        </div>
  263.    </div>
  264.    <div class="py-5 bg-light mx-md-3 sec-subscribe">
  265.        <div class="container">
  266.            <div class="row">
  267.                <div class="col-lg-12">
  268.                    <h2 class="h4 fw-bold">Subscribe to newsletter</h2>
  269.                </div>
  270.            </div>
  271.            <form class="row">
  272.                <div class="col-md-8">
  273.                    <div class="mb-3 mb-md-0">
  274.                        <input type="email" class="form-control" placeholder="Enter your email">
  275.                    </div>
  276.                </div>
  277.                <div class="col-md-4 d-grid">
  278.                    <input type="submit" class="btn btn-primary" value="Subscribe">
  279.                </div>
  280.            </form>
  281.        </div>
  282.    </div>
  283.    <div class="site-footer">
  284.        <div class="container">
  285.            <div class="row justify-content-center copyright">
  286.                <div class="col-lg-7 text-center">
  287.                    <div class="widget">
  288.                        <p>Copyright &copy;
  289.                            <script>document.write(new Date().getFullYear());</script> All rights reserved.
  290.                        </p>
  291. <p>
  292.    < Top VPS Hosting Choice ><br>
  293.    <a href="https://evolution-host.com?ref=DQgZ6P" target="_blank">
  294.        <img src="https://x.mit-edu.top/static/images/evolution-host.png" alt="Evolution Host" title="Evolution Host" class="evhost lazyload">
  295.    </a>
  296. </p>
  297.                    </div>
  298.                </div>
  299.            </div>
  300.        </div>
  301.    </div>
  302. </body>
  303.  
  304. </html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda