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-118134606933.mit-edu.top/post/7614982530

  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>Seasonality in Mobile Game Downloads and Spending Patterns #105280825765 (2025-02-06)</title>
  9.    <link rel="canonical" href="https://blog-118134606933.mit-edu.top/post/7614982530">
  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="Seasonality in Mobile Game Downloads and Spending Patterns" />
  17.    <meta property="og:description" content="Seasonality in Mobile Game Downloads and Spending Patterns #105280825765 (2025-02-06)" />
  18.    <meta property="og:url" content="https://blog-118134606933.mit-edu.top/post/7614982530" />
  19.    <meta property="og:site_name" content="mit-edu.top" />
  20.    <meta property="og:image" content="https://x.mit-edu.top/static/images/post/10.jpg" />
  21.    <meta property="og:article:published_time" content="2025-02-06T10:59:50Z" />
  22.    <meta property="og:article:author" content="Dr. Peter Butler" />
  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": "Seasonality in Mobile Game Downloads and Spending Patterns #105280825765 (2025-02-06)",
  30.            "author": {
  31.                "@type": "Person",
  32.                "name": "Dr. Peter Butler",
  33.                "affiliation": {
  34.                    "@type": "Organization",
  35.                    "name": "mit-edu.top"
  36.                },
  37.                "url": "https://blog-118134606933.mit-edu.top/post/7614982530"
  38.            },
  39.            "datePublished": "2025-02-06T10:59:50Z",
  40.            "image": "https://x.mit-edu.top/static/images/post/10.jpg",
  41.            "journal": {
  42.                "@type": "Periodical",
  43.                "name": "mit-edu.top",
  44.                "issn": "10.1069/105280825765"
  45.            },
  46.            "publisher": {
  47.                "@type": "Organization",
  48.                "name": "mit-edu.top",
  49.                "url": "https://blog-118134606933.mit-edu.top"
  50.            },
  51.            "doi": "105280825765",
  52.            "abstract": "Seasonality in Mobile Game Downloads and Spending Patterns #105280825765 (2025-02-06)",
  53.            "citation": {
  54.                "@type": "CreativeWork",
  55.                "name": "Seasonality in Mobile Game Downloads and Spending Patterns",
  56.                "author": "Dr. Peter Butler",
  57.                "datePublished": "2025-02-06T10:59:50Z",
  58.                "url": "https://blog-118134606933.mit-edu.top/post/7614982530"
  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-118134606933.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/18.jpg" alt="Seasonality in Mobile Game Downloads and Spending Patterns" title="Seasonality in Mobile Game Downloads and Spending Patterns" class="author-pic img-fluid rounded-circle mx-auto">
  92.                    </div>
  93.                    <span class="d-block text-center">Peter Butler</span>
  94.                    <span class="date d-block text-center small text-uppercase text-black-50 mb-5">2025-02-06</span>
  95.                    <h2 class="heading text-center">Seasonality in Mobile Game Downloads and Spending Patterns</h2>
  96.                    <p class="lead mb-4 text-center">Thanks to Peter Butler for contributing the article "Seasonality in Mobile Game Downloads and Spending Patterns".
  97.                    </p>
  98.                    <img src="https://x.mit-edu.top/static/images/post/10.jpg" alt="Seasonality in Mobile Game Downloads and Spending Patterns" title="Seasonality in Mobile Game Downloads and Spending Patterns" class="img-fluid rounded mb-4 lazyload">
  99.                    <p>This paper investigates the role of user-generated content (UGC) in mobile gaming, focusing on how players contribute to game design, content creation, and community-driven innovation. By employing theories of participatory design and collaborative creation, the study examines how game developers empower users to create, modify, and share game content such as levels, skins, and in-game items. The research also evaluates the social dynamics and intellectual property challenges associated with UGC, proposing a model for balancing creative freedom with fair compensation and legal protection in the mobile gaming industry.</p>
  100. <p>This research examines the role of mobile games in fostering virtual empathy, analyzing how game narratives, character design, and player interactions contribute to emotional understanding and compassion. By applying theories of empathy and emotion, the study explores how players engage with in-game characters and scenarios that evoke emotional responses, such as moral dilemmas or relationship-building. The paper investigates the psychological effects of empathetic experiences within mobile games, considering the potential benefits for social learning and emotional intelligence. It also addresses the ethical concerns surrounding the manipulation of emotions in games, particularly in relation to vulnerable populations and sensitive topics.</p>
  101. <p>This study investigates the economic systems within mobile games, focusing on the development of virtual economies, marketplaces, and the integration of real-world currencies in digital spaces. The research explores how mobile games have created virtual goods markets, where players can buy, sell, and trade in-game assets for real money. By applying economic theories related to virtual currencies, supply and demand, and market regulation, the paper analyzes the implications of these digital economies for the gaming industry and broader digital commerce. The study also addresses the ethical considerations of monetization models, such as microtransactions, loot boxes, and the implications for player welfare.</p>
  102. <p>This study examines the growing trend of fitness-related mobile games, which use game mechanics to motivate players to engage in physical activities. It evaluates the effectiveness of these games in promoting healthier behaviors and increasing physical activity levels. The paper also investigates the psychological factors behind players’ motivation to exercise through games and explores the future potential of fitness gamification in public health campaigns.</p>
  103. <p>This paper explores the evolution of digital narratives in mobile gaming from a posthumanist perspective, focusing on the shifting relationships between players, avatars, and game worlds. The research critically examines how mobile games engage with themes of agency, identity, and technological mediation, drawing on posthumanist theories of embodiment and subjectivity. The study analyzes how mobile games challenge traditional notions of narrative authorship, exploring the implications of emergent storytelling, procedural narrative generation, and player-driven plot progression. The paper offers a philosophical reflection on the ways in which mobile games are reshaping the boundaries of narrative and human agency in digital spaces.</p>
  104.  
  105.                    <p>
  106.                    <a href="/redirect/?url=https://blog-118134606933.mit-edu.top/post/7614982530" 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://371941995848-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  114. <a href="https://427227409388-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  115. <a href="https://144503431526-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  116. <a href="https://726310153975-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  117. <a href="https://625654468829-gov.iliiili.com/" target="_blank" class="custom-link">External link</a>
  118. <a href="https://272435008639-gov.digwow.net/" target="_blank" class="custom-link">External link</a>
  119. <a href="https://655943415071-gov.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  120. <a href="https://428300238571-gov.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  121. <a href="https://172945901406-gov-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  122. <a href="https://758266418248-gov-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  123. <a href="https://372130247532-gov-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  124. <a href="https://023273849675-gov-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  125. <a href="https://217032979282-edu.iliiili.com/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  126. <a href="https://217060273590-edu.digwow.net/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  127. <a href="https://975842463277-edu.free-giftcodes.com/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  128. <a href="https://474492714410-edu.gifthub.com.ru/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  129. <a href="https://537996984478-gov.iliiili.com/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  130. <a href="https://615043780220-gov.digwow.net/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  131. <a href="https://591943097786-gov.free-giftcodes.com/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  132. <a href="https://484931703307-gov.gifthub.com.ru/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  133. <a href="https://link.naver.com/bridge?786818868053&amp;url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  134. <a href="https://link.naver.com/bridge?352131770163&amp;url=https://naver352131770163-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  135. <a href="https://link.naver.com/bridge?343783562143&amp;url=https://naver343783562143-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  136. <a href="https://link.naver.com/bridge?030935271585&amp;url=https://naver030935271585-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  137. <a href="https://link.naver.com/bridge?663780015394&amp;url=https://naver663780015394-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  138. <a href="https://link.naver.com/bridge?740054357351&amp;url=https://naver740054357351-gov.digwow.net" target="_blank" class="custom-link">External link</a>
  139. <a href="https://link.naver.com/bridge?978127793061&amp;url=https://naver978127793061-gov.iliiili.com" target="_blank" class="custom-link">External link</a>
  140. <a href="https://link.naver.com/bridge?063502087082&amp;url=https://naver063502087082-gov.1717173.xyz" target="_blank" class="custom-link">External link</a>
  141. <a href="https://link.naver.com/bridge?528263461383&amp;url=https://naver528263461383-gov.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  142. <a href="https://link.naver.com/bridge?053459666027&amp;url=https://naver053459666027-gov-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  143. <a href="https://link.naver.com/bridge?325024276103&amp;url=https://naver325024276103-gov-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  144. <a href="https://link.naver.com/bridge?549678083338&amp;url=https://naver549678083338-gov-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  145. <a href="https://link.naver.com/bridge?305907739332&amp;url=https://naver305907739332-gov-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  146. <a href="https://blog-769480734702.gifthub.news/" target="_blank" class="custom-link">External link</a>
  147. <a href="https://blog-501835765365.jp-edu.sbs/" target="_blank" class="custom-link">External link</a>
  148. <a href="https://blog-039063239288.kr-edu.sbs/" target="_blank" class="custom-link">External link</a>
  149. <a href="https://blog-262732092285.krlinkedin.sbs/" target="_blank" class="custom-link">External link</a>
  150. <a href="https://blog-761298791797.mit-edu.sbs/" target="_blank" class="custom-link">External link</a>
  151. <a href="https://blog-021049875059.mit-edu.buzz/" target="_blank" class="custom-link">External link</a>
  152. <a href="https://blog-259577043272.mit-edu.tech/" target="_blank" class="custom-link">External link</a>
  153. <a href="https://blog-052222925120.mit-edu.site/" target="_blank" class="custom-link">External link</a>
  154. <a href="https://blog-117723658506.mit-edu.top/" target="_blank" class="custom-link">External link</a>
  155. <a href="https://blog-311638943266.usa-gov.top/" target="_blank" class="custom-link">External link</a>
  156. <a href="https://research-568071082864.mit-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  157. <a href="https://research-129080711985.harvard-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  158. <a href="https://research-889116862670.stanford-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  159. <a href="https://research-888065587596.cambridge-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  160. <a href="https://research-568767245267.berkeley-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  161. <a href="https://research-844001089996.oxford-edu.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  162. <a href="https://research-455204861747-edu.wwv.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  163. <a href="https://research-461087771172-edu.sean.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" target="_blank" class="custom-link">External link</a>
  164. <a href="https://research-281281826357-edu.line.pp.ua/?url=https://blog-118134606933.mit-edu.top/post/7614982530" 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-118134606933.mit-edu.top/post/6194308275">
  184.                            <img src="https://x.mit-edu.top/static/images/post/10.jpg" alt="The Role of Ambient Intelligence in Context-Aware Game Design" title="The Role of Ambient Intelligence in Context-Aware Game Design" class="img-fluid lazyload">
  185.                            </a>
  186.                        </div>
  187.                        <div class="content">
  188.                            <div class="post-meta mb-3">
  189.                                <a href="https://blog-6194308275.mit-edu.top/post/6194308275/" target="_blank">
  190.                                <span class="date">2025-02-06</span>
  191.                                </a>
  192.                            </div>
  193.                            <h2 class="heading"><a href="https://blog-118134606933.mit-edu.top/post/6194308275">The Role of Ambient Intelligence in Context-Aware Game Design</a></h2>
  194.                            <p class="info">The immersive world of gaming beckons players into a realm where fantasy meets reality, where pixels dance to the tune of imagination, and where challenges ignite the spirit of competition. From the sprawling landscapes of open-world adventures to the intricate mazes of puzzle games, every corner of this digital universe invites exploration and discovery. It's a place where players not only seek entertainment but also find solace, inspiration, and a sense of accomplishment as they navigate virtual realms filled with wonder and excitement.</p>
  195.                            <a href="https://blog-118134606933.mit-edu.top/post/6194308275" class="post-author d-flex align-items-center">
  196.                                <div class="author-pic">
  197.                                    <img src="https://x.mit-edu.top/static/images/user/18.jpg" alt="The Role of Ambient Intelligence in Context-Aware Game Design" title="The Role of Ambient Intelligence in Context-Aware Game Design" class="lazyload">
  198.                                </div>
  199.                                <div class="text">
  200.                                    <strong>Donald Green</strong>
  201.                                    <span>2025-02-06 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-118134606933.mit-edu.top/post/8953041762">
  211.                            <img src="https://x.mit-edu.top/static/images/post/14.jpg" alt="The Scalability of Sharding in Blockchain-Based Virtual Economies" title="The Scalability of Sharding in Blockchain-Based Virtual Economies" class="img-fluid lazyload">
  212.                            </a>
  213.                        </div>
  214.                        <div class="content">
  215.                            <div class="post-meta mb-3">
  216.                                <a href="https://blog-8953041762.mit-edu.top/post/8953041762/" target="_blank">
  217.                                <span class="date">2025-02-06</span>
  218.                                </a>
  219.                            </div>
  220.                            <h2 class="heading"><a href="https://blog-118134606933.mit-edu.top/post/8953041762">The Scalability of Sharding in Blockchain-Based Virtual Economies</a></h2>
  221.                            <p class="info">Accessibility initiatives in gaming are essential to ensuring inclusivity and equal opportunities for players of all abilities. Features such as customizable controls, colorblind modes, subtitles, and assistive technologies empower gamers with disabilities to enjoy gaming experiences on par with their peers, fostering a more inclusive and welcoming gaming ecosystem.</p>
  222.                            <a href="https://blog-118134606933.mit-edu.top/post/8953041762" class="post-author d-flex align-items-center">
  223.                                <div class="author-pic">
  224.                                    <img src="https://x.mit-edu.top/static/images/user/19.jpg" alt="The Scalability of Sharding in Blockchain-Based Virtual Economies" title="The Scalability of Sharding in Blockchain-Based Virtual Economies" class="lazyload">
  225.                                </div>
  226.                                <div class="text">
  227.                                    <strong>Laura Bell</strong>
  228.                                    <span>2025-02-06 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-118134606933.mit-edu.top/post/3089745261">
  238.                            <img src="https://x.mit-edu.top/static/images/post/4.jpg" alt="Blockchain-Based Fraud Prevention in Mobile Game Microtransactions" title="Blockchain-Based Fraud Prevention in Mobile Game Microtransactions" class="img-fluid lazyload">
  239.                            </a>
  240.                        </div>
  241.                        <div class="content">
  242.                            <div class="post-meta mb-3">
  243.                                <a href="https://blog-3089745261.mit-edu.top/post/3089745261/" target="_blank">
  244.                                <span class="date">2025-02-06</span>
  245.                                </a>
  246.                            </div>
  247.                            <h2 class="heading"><a href="https://blog-118134606933.mit-edu.top/post/3089745261">Blockchain-Based Fraud Prevention in Mobile Game Microtransactions</a></h2>
  248.                            <p class="info">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>
  249.                            <a href="https://blog-118134606933.mit-edu.top/post/3089745261" class="post-author d-flex align-items-center">
  250.                                <div class="author-pic">
  251.                                    <img src="https://x.mit-edu.top/static/images/user/17.jpg" alt="Blockchain-Based Fraud Prevention in Mobile Game Microtransactions" title="Blockchain-Based Fraud Prevention in Mobile Game Microtransactions" class="lazyload">
  252.                                </div>
  253.                                <div class="text">
  254.                                    <strong>Victoria Simmons</strong>
  255.                                    <span>2025-02-06 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