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://research-diksfs.gifthub.news/post/1869240753

  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>Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective #566498539742 (2025-02-02)</title>
  9.    <link rel="canonical" href="https://research-diksfs.gifthub.news/post/1869240753">
  10.    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&display=swap">
  11.    <link rel="stylesheet" href="https://x.gifthub.news/static/css/style.css">
  12.    <script src="https://x.gifthub.news/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="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective" />
  17.    <meta property="og:description" content="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective #566498539742 (2025-02-02)" />
  18.    <meta property="og:url" content="https://research-diksfs.gifthub.news/post/1869240753" />
  19.    <meta property="og:site_name" content="gifthub.news" />
  20.    <meta property="og:image" content="https://x.gifthub.news/static/images/post/12.jpg" />
  21.    <meta property="og:article:published_time" content="2025-02-02T10:49:27Z" />
  22.    <meta property="og:article:author" content="Dr. Gregory Jenkins" />
  23.    <meta property="og:article:section" content="gifthub.news" />
  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": "Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective #566498539742 (2025-02-02)",
  30.            "author": {
  31.                "@type": "Person",
  32.                "name": "Dr. Gregory Jenkins",
  33.                "affiliation": {
  34.                    "@type": "Organization",
  35.                    "name": "gifthub.news"
  36.                },
  37.                "url": "https://research-diksfs.gifthub.news/post/1869240753"
  38.            },
  39.            "datePublished": "2025-02-02T10:49:27Z",
  40.            "image": "https://x.gifthub.news/static/images/post/12.jpg",
  41.            "journal": {
  42.                "@type": "Periodical",
  43.                "name": "gifthub.news",
  44.                "issn": "10.1069/566498539742"
  45.            },
  46.            "publisher": {
  47.                "@type": "Organization",
  48.                "name": "gifthub.news",
  49.                "url": "https://research-diksfs.gifthub.news"
  50.            },
  51.            "doi": "566498539742",
  52.            "abstract": "Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective #566498539742 (2025-02-02)",
  53.            "citation": {
  54.                "@type": "CreativeWork",
  55.                "name": "Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective",
  56.                "author": "Dr. Gregory Jenkins",
  57.                "datePublished": "2025-02-02T10:49:27Z",
  58.                "url": "https://research-diksfs.gifthub.news/post/1869240753"
  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://research-diksfs.gifthub.news" class="logo m-0 text-uppercase">gifthub.news</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.gifthub.news/static/images/user/17.jpg" alt="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective" title="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective" class="author-pic img-fluid rounded-circle mx-auto">
  92.                    </div>
  93.                    <span class="d-block text-center">Gregory Jenkins</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">Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective</h2>
  96.                    <p class="lead mb-4 text-center">Thanks to Gregory Jenkins for contributing the article "Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective".
  97.                    </p>
  98.                    <img src="https://x.gifthub.news/static/images/post/12.jpg" alt="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective" title="Tokenomics in Multi-Game Ecosystems: A Blockchain Perspective" class="img-fluid rounded mb-4 lazyload">
  99.                    <p>In the labyrinth of quests and adventures, gamers become digital explorers, venturing into uncharted territories and unraveling mysteries that test their wit and resolve. Whether embarking on a daring rescue mission or delving deep into ancient ruins, each quest becomes a personal journey, shaping characters and forging legends that echo through the annals of gaming history. The thrill of overcoming obstacles and the satisfaction of completing objectives fuel the relentless pursuit of new challenges and the quest for gaming excellence.</p>
  100. <p>This research critically examines the ethical implications of data mining in mobile games, particularly concerning the collection and analysis of player data for monetization, personalization, and behavioral profiling. The paper evaluates how mobile game developers utilize big data, machine learning, and predictive analytics to gain insights into player behavior, highlighting the risks associated with data privacy, consent, and exploitation. Drawing on theories of privacy ethics and consumer protection, the study discusses potential regulatory frameworks and industry standards aimed at safeguarding user rights while maintaining the economic viability of mobile gaming businesses.</p>
  101. <p>This study explores the social and economic implications of microtransactions in mobile gaming, focusing on player behavior, spending patterns, and the potential for addiction. It also investigates the broader effects on the gaming industry, such as the shift in business models, the emergence of virtual economies, and the ethical concerns surrounding "pay-to-win" mechanics. The research offers policy recommendations to address these issues in a balanced manner.</p>
  102. <p>This research critically analyzes the representation of diverse cultures, identities, and experiences in mobile games. It explores how game developers approach diversity and inclusion, from character design to narrative themes. The study discusses the challenges of creating culturally sensitive content while ensuring broad market appeal and the potential social impact of inclusive mobile game design.</p>
  103. <p>This research explores the importance of cultural sensitivity and localization in the design of mobile games for global audiences. The study examines how localization practices, including language translation, cultural adaptation, and regional sensitivity, influence the reception and success of mobile games in diverse markets. Drawing on cross-cultural communication theory and international marketing, the paper investigates the challenges and strategies for designing culturally inclusive games that resonate with players from different countries and cultural backgrounds. The research also discusses the ethical responsibility of game developers to avoid cultural appropriation, stereotypes, and misrepresentations, offering guidelines for creating culturally respectful and globally appealing mobile games.</p>
  104.  
  105.                    <p>
  106.                    <a href="/redirect/?url=https://research-diksfs.gifthub.news/post/1869240753" 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://809773263832-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  114. <a href="https://937777983830-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  115. <a href="https://028086667644-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  116. <a href="https://061344647325-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  117. <a href="https://013397409318-gov.iliiili.com/" target="_blank" class="custom-link">External link</a>
  118. <a href="https://085749245380-gov.digwow.net/" target="_blank" class="custom-link">External link</a>
  119. <a href="https://844686198437-gov.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  120. <a href="https://278110918492-gov.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  121. <a href="https://317956931409-gov-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  122. <a href="https://018962680591-gov-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  123. <a href="https://592341683478-gov-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  124. <a href="https://172213124010-gov-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  125. <a href="https://289239499633-edu.iliiili.com/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  126. <a href="https://701059966288-edu.digwow.net/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  127. <a href="https://501002131065-edu.free-giftcodes.com/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  128. <a href="https://904878248453-edu.gifthub.com.ru/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  129. <a href="https://350088939049-gov.iliiili.com/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  130. <a href="https://353450950447-gov.digwow.net/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  131. <a href="https://262108544542-gov.free-giftcodes.com/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  132. <a href="https://446340375611-gov.gifthub.com.ru/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  133. <a href="https://link.naver.com/bridge?716750587897&amp;url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  134. <a href="https://link.naver.com/bridge?741196430175&amp;url=https://naver741196430175-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  135. <a href="https://link.naver.com/bridge?103775946622&amp;url=https://naver103775946622-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  136. <a href="https://link.naver.com/bridge?780479243463&amp;url=https://naver780479243463-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  137. <a href="https://link.naver.com/bridge?017124744021&amp;url=https://naver017124744021-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  138. <a href="https://link.naver.com/bridge?516278457594&amp;url=https://naver516278457594-gov.digwow.net" target="_blank" class="custom-link">External link</a>
  139. <a href="https://link.naver.com/bridge?429865177889&amp;url=https://naver429865177889-gov.iliiili.com" target="_blank" class="custom-link">External link</a>
  140. <a href="https://link.naver.com/bridge?363765927645&amp;url=https://naver363765927645-gov.1717173.xyz" target="_blank" class="custom-link">External link</a>
  141. <a href="https://link.naver.com/bridge?590240792678&amp;url=https://naver590240792678-gov.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  142. <a href="https://link.naver.com/bridge?296975811288&amp;url=https://naver296975811288-gov-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  143. <a href="https://link.naver.com/bridge?880545194129&amp;url=https://naver880545194129-gov-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  144. <a href="https://link.naver.com/bridge?298455385973&amp;url=https://naver298455385973-gov-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  145. <a href="https://link.naver.com/bridge?464692471436&amp;url=https://naver464692471436-gov-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  146. <a href="https://blog-045568487233.gifthub.news/" target="_blank" class="custom-link">External link</a>
  147. <a href="https://blog-871379626185.jp-edu.sbs/" target="_blank" class="custom-link">External link</a>
  148. <a href="https://blog-323577172729.kr-edu.sbs/" target="_blank" class="custom-link">External link</a>
  149. <a href="https://blog-578301689826.krlinkedin.sbs/" target="_blank" class="custom-link">External link</a>
  150. <a href="https://blog-898416049406.mit-edu.sbs/" target="_blank" class="custom-link">External link</a>
  151. <a href="https://blog-214486443273.mit-edu.buzz/" target="_blank" class="custom-link">External link</a>
  152. <a href="https://blog-432325005946.mit-edu.tech/" target="_blank" class="custom-link">External link</a>
  153. <a href="https://blog-551591113562.mit-edu.site/" target="_blank" class="custom-link">External link</a>
  154. <a href="https://blog-206633977219.mit-edu.top/" target="_blank" class="custom-link">External link</a>
  155. <a href="https://blog-819404069219.usa-gov.top/" target="_blank" class="custom-link">External link</a>
  156. <a href="https://research-431798918572.mit-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  157. <a href="https://research-979600591432.harvard-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  158. <a href="https://research-938969803082.stanford-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  159. <a href="https://research-874732939890.cambridge-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  160. <a href="https://research-959092296182.berkeley-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  161. <a href="https://research-163471659123.oxford-edu.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  162. <a href="https://research-326216301201-edu.wwv.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  163. <a href="https://research-530148455702-edu.sean.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" target="_blank" class="custom-link">External link</a>
  164. <a href="https://research-978881213944-edu.line.pp.ua/?url=https://research-diksfs.gifthub.news/post/1869240753" 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://research-diksfs.gifthub.news/post/7183206954">
  184.                            <img src="https://x.gifthub.news/static/images/post/12.jpg" alt="Differential Privacy Techniques for Protecting Player Data in Analytics Systems" title="Differential Privacy Techniques for Protecting Player Data in Analytics Systems" class="img-fluid lazyload">
  185.                            </a>
  186.                        </div>
  187.                        <div class="content">
  188.                            <div class="post-meta mb-3">
  189.                                <a href="https://blog-7183206954.gifthub.news/post/7183206954/" target="_blank">
  190.                                <span class="date">2025-02-02</span>
  191.                                </a>
  192.                            </div>
  193.                            <h2 class="heading"><a href="https://research-diksfs.gifthub.news/post/7183206954">Differential Privacy Techniques for Protecting Player Data in Analytics Systems</a></h2>
  194.                            <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>
  195.                            <a href="https://research-diksfs.gifthub.news/post/7183206954" class="post-author d-flex align-items-center">
  196.                                <div class="author-pic">
  197.                                    <img src="https://x.gifthub.news/static/images/user/17.jpg" alt="Differential Privacy Techniques for Protecting Player Data in Analytics Systems" title="Differential Privacy Techniques for Protecting Player Data in Analytics Systems" class="lazyload">
  198.                                </div>
  199.                                <div class="text">
  200.                                    <strong>Edward Roberts</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://research-diksfs.gifthub.news/post/1704698352">
  211.                            <img src="https://x.gifthub.news/static/images/post/13.jpg" alt="Integrating Haptic Feedback to Enhance Tactile Immersion in Mobile Games" title="Integrating Haptic Feedback to Enhance Tactile Immersion 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-1704698352.gifthub.news/post/1704698352/" target="_blank">
  217.                                <span class="date">2025-02-02</span>
  218.                                </a>
  219.                            </div>
  220.                            <h2 class="heading"><a href="https://research-diksfs.gifthub.news/post/1704698352">Integrating Haptic Feedback to Enhance Tactile Immersion in Mobile Games</a></h2>
  221.                            <p class="info">This study investigates how mobile games can encourage physical activity among players, focusing on games that incorporate movement and exercise. It evaluates the effectiveness of these games in promoting health and fitness. </p>
  222.                            <a href="https://research-diksfs.gifthub.news/post/1704698352" class="post-author d-flex align-items-center">
  223.                                <div class="author-pic">
  224.                                    <img src="https://x.gifthub.news/static/images/user/18.jpg" alt="Integrating Haptic Feedback to Enhance Tactile Immersion in Mobile Games" title="Integrating Haptic Feedback to Enhance Tactile Immersion in Mobile Games" class="lazyload">
  225.                                </div>
  226.                                <div class="text">
  227.                                    <strong>Jerry Fisher</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://research-diksfs.gifthub.news/post/4831506297">
  238.                            <img src="https://x.gifthub.news/static/images/post/1.jpg" alt="Revenue Optimization Models for Hyper-Casual Mobile Games Using Dynamic Pricing Algorithms" title="Revenue Optimization Models for Hyper-Casual Mobile Games Using Dynamic Pricing Algorithms" class="img-fluid lazyload">
  239.                            </a>
  240.                        </div>
  241.                        <div class="content">
  242.                            <div class="post-meta mb-3">
  243.                                <a href="https://blog-4831506297.gifthub.news/post/4831506297/" target="_blank">
  244.                                <span class="date">2025-02-02</span>
  245.                                </a>
  246.                            </div>
  247.                            <h2 class="heading"><a href="https://research-diksfs.gifthub.news/post/4831506297">Revenue Optimization Models for Hyper-Casual Mobile Games Using Dynamic Pricing Algorithms</a></h2>
  248.                            <p class="info">This paper investigates the role of social influence in mobile games, focusing on how social networks, peer pressure, and social comparison affect player behavior and in-game purchasing decisions. The study examines how features such as leaderboards, friend lists, and social sharing options influence players’ motivations to engage with the game and spend money on in-game items. Drawing on social psychology and behavioral economics, the research explores how players' decisions are shaped by their interactions with others in the game environment. The paper also discusses the ethical implications of using social influence to drive in-game purchases, particularly in relation to vulnerable players and addiction risk.</p>
  249.                            <a href="https://research-diksfs.gifthub.news/post/4831506297" class="post-author d-flex align-items-center">
  250.                                <div class="author-pic">
  251.                                    <img src="https://x.gifthub.news/static/images/user/2.jpg" alt="Revenue Optimization Models for Hyper-Casual Mobile Games Using Dynamic Pricing Algorithms" title="Revenue Optimization Models for Hyper-Casual Mobile Games Using Dynamic Pricing Algorithms" class="lazyload">
  252.                                </div>
  253.                                <div class="text">
  254.                                    <strong>Pamela Kelly</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.gifthub.news/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