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://f7comu.mit-edu.top/post/4067813952

  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>Game as a Service (GaaS): Redefining Business Models in Mobile Gaming #359886766874 (2025-02-02)</title>
  9.    <link rel="canonical" href="https://f7comu.mit-edu.top/post/4067813952">
  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="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming" />
  17.    <meta property="og:description" content="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming #359886766874 (2025-02-02)" />
  18.    <meta property="og:url" content="https://f7comu.mit-edu.top/post/4067813952" />
  19.    <meta property="og:site_name" content="mit-edu.top" />
  20.    <meta property="og:image" content="https://x.mit-edu.top/static/images/post/12.jpg" />
  21.    <meta property="og:article:published_time" content="2025-02-01T20:01:33Z" />
  22.    <meta property="og:article:author" content="Dr. Michelle Turner" />
  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": "Game as a Service (GaaS): Redefining Business Models in Mobile Gaming #359886766874 (2025-02-02)",
  30.            "author": {
  31.                "@type": "Person",
  32.                "name": "Dr. Michelle Turner",
  33.                "affiliation": {
  34.                    "@type": "Organization",
  35.                    "name": "mit-edu.top"
  36.                },
  37.                "url": "https://f7comu.mit-edu.top/post/4067813952"
  38.            },
  39.            "datePublished": "2025-02-01T20:01:33Z",
  40.            "image": "https://x.mit-edu.top/static/images/post/12.jpg",
  41.            "journal": {
  42.                "@type": "Periodical",
  43.                "name": "mit-edu.top",
  44.                "issn": "10.1069/359886766874"
  45.            },
  46.            "publisher": {
  47.                "@type": "Organization",
  48.                "name": "mit-edu.top",
  49.                "url": "https://f7comu.mit-edu.top"
  50.            },
  51.            "doi": "359886766874",
  52.            "abstract": "Game as a Service (GaaS): Redefining Business Models in Mobile Gaming #359886766874 (2025-02-02)",
  53.            "citation": {
  54.                "@type": "CreativeWork",
  55.                "name": "Game as a Service (GaaS): Redefining Business Models in Mobile Gaming",
  56.                "author": "Dr. Michelle Turner",
  57.                "datePublished": "2025-02-01T20:01:33Z",
  58.                "url": "https://f7comu.mit-edu.top/post/4067813952"
  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://f7comu.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/9.jpg" alt="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming" title="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming" class="author-pic img-fluid rounded-circle mx-auto">
  92.                    </div>
  93.                    <span class="d-block text-center">Michelle Turner</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">Game as a Service (GaaS): Redefining Business Models in Mobile Gaming</h2>
  96.                    <p class="lead mb-4 text-center">Thanks to Michelle Turner for contributing the article "Game as a Service (GaaS): Redefining Business Models in Mobile Gaming".
  97.                    </p>
  98.                    <img src="https://x.mit-edu.top/static/images/post/12.jpg" alt="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming" title="Game as a Service (GaaS): Redefining Business Models in Mobile Gaming" class="img-fluid rounded mb-4 lazyload">
  99.                    <p>Gaming culture has evolved into a vibrant and interconnected community where players from diverse backgrounds and cultures converge. They share strategies, forge lasting alliances, and engage in friendly competition, turning virtual friendships into real-world connections that span continents. This global network of gamers not only celebrates shared interests and passions but also fosters a sense of unity and belonging in a world that can often feel fragmented. From online forums and social media groups to live gaming events and conventions, the camaraderie and mutual respect among gamers continue to strengthen the bonds that unite this dynamic community.</p>
  100. <p>This study investigates the use of gamification techniques in mobile learning applications, focusing on how game-like elements such as scoring, badges, and leaderboards influence user engagement and motivation. It assesses the effectiveness of gamification in enhancing learning outcomes, particularly in educational apps targeting children and young adults. The paper also addresses challenges in designing gamified systems that balance educational value with entertainment.</p>
  101. <p>This paper explores the use of mobile games as learning tools, integrating gamification strategies into educational contexts. The research draws on cognitive learning theories and educational psychology to analyze how game mechanics such as rewards, challenges, and feedback influence knowledge retention, motivation, and problem-solving skills. By reviewing case studies of mobile learning games, the paper identifies best practices for designing educational games that foster deep learning experiences while maintaining player engagement. The study also examines the potential for mobile games to address disparities in education access and equity, particularly in resource-limited environments.</p>
  102. <p>This research provides a critical analysis of gender representation in mobile games, focusing on the portrayal of gender stereotypes and the inclusivity of diverse gender identities in game design. The study investigates how mobile games depict male, female, and non-binary characters, examining the roles, traits, and agency afforded to these characters within game narratives and mechanics. Drawing on feminist theory and media studies, the paper critiques the reinforcement of traditional gender roles and the underrepresentation of marginalized genders in mobile games. The research also explores how game developers can promote inclusivity through diverse character designs, storylines, and gameplay mechanics, offering suggestions for more equitable and progressive representations in mobile gaming.</p>
  103. <p>This paper explores the use of mobile games as educational tools, assessing their effectiveness in teaching various subjects and skills. It discusses the advantages and limitations of game-based learning in mobile contexts.</p>
  104.  
  105.                    <p>
  106.                    <a href="/redirect/?url=https://f7comu.mit-edu.top/post/4067813952" 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://479832019884-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  114. <a href="https://812310169438-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  115. <a href="https://193012969943-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  116. <a href="https://155034525867-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  117. <a href="https://874717537938-gov.iliiili.com/" target="_blank" class="custom-link">External link</a>
  118. <a href="https://234239645158-gov.digwow.net/" target="_blank" class="custom-link">External link</a>
  119. <a href="https://610197884366-gov.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  120. <a href="https://020814747260-gov.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  121. <a href="https://125741503622-gov-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  122. <a href="https://311847549531-gov-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  123. <a href="https://905722845419-gov-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  124. <a href="https://669932273367-gov-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  125. <a href="https://112075175757-edu.iliiili.com/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  126. <a href="https://931483449343-edu.digwow.net/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  127. <a href="https://660906618826-edu.free-giftcodes.com/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  128. <a href="https://444919703951-edu.gifthub.com.ru/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  129. <a href="https://295230596686-gov.iliiili.com/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  130. <a href="https://258140884286-gov.digwow.net/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  131. <a href="https://157542672295-gov.free-giftcodes.com/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  132. <a href="https://245904639453-gov.gifthub.com.ru/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  133. <a href="https://link.naver.com/bridge?432950575220&amp;url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  134. <a href="https://link.naver.com/bridge?597726341831&amp;url=https://naver597726341831-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  135. <a href="https://link.naver.com/bridge?295140593789&amp;url=https://naver295140593789-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  136. <a href="https://link.naver.com/bridge?847460410292&amp;url=https://naver847460410292-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  137. <a href="https://link.naver.com/bridge?926100230854&amp;url=https://naver926100230854-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  138. <a href="https://link.naver.com/bridge?803281265012&amp;url=https://naver803281265012-gov.digwow.net" target="_blank" class="custom-link">External link</a>
  139. <a href="https://link.naver.com/bridge?064083386996&amp;url=https://naver064083386996-gov.iliiili.com" target="_blank" class="custom-link">External link</a>
  140. <a href="https://link.naver.com/bridge?020005496724&amp;url=https://naver020005496724-gov.1717173.xyz" target="_blank" class="custom-link">External link</a>
  141. <a href="https://link.naver.com/bridge?941542758267&amp;url=https://naver941542758267-gov.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  142. <a href="https://link.naver.com/bridge?695295997998&amp;url=https://naver695295997998-gov-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  143. <a href="https://link.naver.com/bridge?448010504669&amp;url=https://naver448010504669-gov-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  144. <a href="https://link.naver.com/bridge?935761521140&amp;url=https://naver935761521140-gov-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  145. <a href="https://link.naver.com/bridge?630420374176&amp;url=https://naver630420374176-gov-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  146. <a href="https://blog-127693686163.gifthub.news/" target="_blank" class="custom-link">External link</a>
  147. <a href="https://blog-315520693646.jp-edu.sbs/" target="_blank" class="custom-link">External link</a>
  148. <a href="https://blog-774191814573.kr-edu.sbs/" target="_blank" class="custom-link">External link</a>
  149. <a href="https://blog-842568890353.krlinkedin.sbs/" target="_blank" class="custom-link">External link</a>
  150. <a href="https://blog-412887454974.mit-edu.sbs/" target="_blank" class="custom-link">External link</a>
  151. <a href="https://blog-155503987133.mit-edu.buzz/" target="_blank" class="custom-link">External link</a>
  152. <a href="https://blog-923058390678.mit-edu.tech/" target="_blank" class="custom-link">External link</a>
  153. <a href="https://blog-323820236786.mit-edu.site/" target="_blank" class="custom-link">External link</a>
  154. <a href="https://blog-075899291697.mit-edu.top/" target="_blank" class="custom-link">External link</a>
  155. <a href="https://blog-426594327719.usa-gov.top/" target="_blank" class="custom-link">External link</a>
  156. <a href="https://research-833411129608.mit-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  157. <a href="https://research-538697340099.harvard-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  158. <a href="https://research-522393376618.stanford-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  159. <a href="https://research-820891654513.cambridge-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  160. <a href="https://research-257366229458.berkeley-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  161. <a href="https://research-796458241220.oxford-edu.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  162. <a href="https://research-496847163990-edu.wwv.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  163. <a href="https://research-622578447193-edu.sean.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" target="_blank" class="custom-link">External link</a>
  164. <a href="https://research-917149288872-edu.line.pp.ua/?url=https://f7comu.mit-edu.top/post/4067813952" 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://f7comu.mit-edu.top/post/9548271306">
  184.                            <img src="https://x.mit-edu.top/static/images/post/12.jpg" alt="Bayesian Inference in Reinforcement Learning for Robust Strategy Adaptation" title="Bayesian Inference in Reinforcement Learning for Robust Strategy Adaptation" class="img-fluid lazyload">
  185.                            </a>
  186.                        </div>
  187.                        <div class="content">
  188.                            <div class="post-meta mb-3">
  189.                                <a href="https://blog-9548271306.mit-edu.top/post/9548271306/" target="_blank">
  190.                                <span class="date">2025-02-02</span>
  191.                                </a>
  192.                            </div>
  193.                            <h2 class="heading"><a href="https://f7comu.mit-edu.top/post/9548271306">Bayesian Inference in Reinforcement Learning for Robust Strategy Adaptation</a></h2>
  194.                            <p class="info">This paper explores the globalization of mobile gaming, focusing on the cultural, economic, and technological dimensions of the mobile game industry. It examines how mobile games transcend national borders, shaping global entertainment trends, cultural exchanges, and consumption patterns. The study analyzes the role of international distribution platforms, such as app stores and online marketplaces, in facilitating cross-border gaming experiences, while also considering the impact of localization strategies on cultural representation and game design. Furthermore, the research investigates the economic implications of mobile game globalization, including market entry strategies, pricing models, and the influence of local regulations.</p>
  195.                            <a href="https://f7comu.mit-edu.top/post/9548271306" class="post-author d-flex align-items-center">
  196.                                <div class="author-pic">
  197.                                    <img src="https://x.mit-edu.top/static/images/user/9.jpg" alt="Bayesian Inference in Reinforcement Learning for Robust Strategy Adaptation" title="Bayesian Inference in Reinforcement Learning for Robust Strategy Adaptation" class="lazyload">
  198.                                </div>
  199.                                <div class="text">
  200.                                    <strong>Nicholas Richardson</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://f7comu.mit-edu.top/post/2918754360">
  211.                            <img src="https://x.mit-edu.top/static/images/post/11.jpg" alt="Serious Games as Tools for Improving Spatial Reasoning in K-12 Education" title="Serious Games as Tools for Improving Spatial Reasoning in K-12 Education" class="img-fluid lazyload">
  212.                            </a>
  213.                        </div>
  214.                        <div class="content">
  215.                            <div class="post-meta mb-3">
  216.                                <a href="https://blog-2918754360.mit-edu.top/post/2918754360/" target="_blank">
  217.                                <span class="date">2025-02-02</span>
  218.                                </a>
  219.                            </div>
  220.                            <h2 class="heading"><a href="https://f7comu.mit-edu.top/post/2918754360">Serious Games as Tools for Improving Spatial Reasoning in K-12 Education</a></h2>
  221.                            <p class="info">This study investigates the privacy and data security issues associated with mobile gaming, focusing on data collection practices, user consent, and potential vulnerabilities. It proposes strategies for enhancing data protection and ensuring user privacy.</p>
  222.                            <a href="https://f7comu.mit-edu.top/post/2918754360" class="post-author d-flex align-items-center">
  223.                                <div class="author-pic">
  224.                                    <img src="https://x.mit-edu.top/static/images/user/13.jpg" alt="Serious Games as Tools for Improving Spatial Reasoning in K-12 Education" title="Serious Games as Tools for Improving Spatial Reasoning in K-12 Education" class="lazyload">
  225.                                </div>
  226.                                <div class="text">
  227.                                    <strong>Harold Matthews</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://f7comu.mit-edu.top/post/6412783095">
  238.                            <img src="https://x.mit-edu.top/static/images/post/16.jpg" alt="Simulating Realistic Physics in Low-Powered Mobile Devices" title="Simulating Realistic Physics in Low-Powered Mobile Devices" class="img-fluid lazyload">
  239.                            </a>
  240.                        </div>
  241.                        <div class="content">
  242.                            <div class="post-meta mb-3">
  243.                                <a href="https://blog-6412783095.mit-edu.top/post/6412783095/" target="_blank">
  244.                                <span class="date">2025-02-02</span>
  245.                                </a>
  246.                            </div>
  247.                            <h2 class="heading"><a href="https://f7comu.mit-edu.top/post/6412783095">Simulating Realistic Physics in Low-Powered Mobile Devices</a></h2>
  248.                            <p class="info">This paper examines the intersection of mobile games and behavioral economics, exploring how game mechanics can be used to influence economic decision-making and consumer behavior. Drawing on insights from psychology, game theory, and economics, the study analyzes how mobile games employ reward systems, uncertainty, risk-taking, and resource management to simulate real-world economic decisions. The research explores the potential for mobile games to be used as tools for teaching economic principles, as well as their role in shaping financial behavior in the digital economy. The paper also discusses the ethical considerations of using gamified elements in influencing players’ financial choices.</p>
  249.                            <a href="https://f7comu.mit-edu.top/post/6412783095" class="post-author d-flex align-items-center">
  250.                                <div class="author-pic">
  251.                                    <img src="https://x.mit-edu.top/static/images/user/19.jpg" alt="Simulating Realistic Physics in Low-Powered Mobile Devices" title="Simulating Realistic Physics in Low-Powered Mobile Devices" class="lazyload">
  252.                                </div>
  253.                                <div class="text">
  254.                                    <strong>Robert Jones</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