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://778787.mit-edu.top/post/5620139784

  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>Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis #805016104178 (2025-02-05)</title>
  9.    <link rel="canonical" href="https://778787.mit-edu.top/post/5620139784">
  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="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis" />
  17.    <meta property="og:description" content="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis #805016104178 (2025-02-05)" />
  18.    <meta property="og:url" content="https://778787.mit-edu.top/post/5620139784" />
  19.    <meta property="og:site_name" content="mit-edu.top" />
  20.    <meta property="og:image" content="https://x.mit-edu.top/static/images/post/5.jpg" />
  21.    <meta property="og:article:published_time" content="2025-02-05T15:45:48Z" />
  22.    <meta property="og:article:author" content="Dr. Judith Mitchell" />
  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": "Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis #805016104178 (2025-02-05)",
  30.            "author": {
  31.                "@type": "Person",
  32.                "name": "Dr. Judith Mitchell",
  33.                "affiliation": {
  34.                    "@type": "Organization",
  35.                    "name": "mit-edu.top"
  36.                },
  37.                "url": "https://778787.mit-edu.top/post/5620139784"
  38.            },
  39.            "datePublished": "2025-02-05T15:45:48Z",
  40.            "image": "https://x.mit-edu.top/static/images/post/5.jpg",
  41.            "journal": {
  42.                "@type": "Periodical",
  43.                "name": "mit-edu.top",
  44.                "issn": "10.1069/805016104178"
  45.            },
  46.            "publisher": {
  47.                "@type": "Organization",
  48.                "name": "mit-edu.top",
  49.                "url": "https://778787.mit-edu.top"
  50.            },
  51.            "doi": "805016104178",
  52.            "abstract": "Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis #805016104178 (2025-02-05)",
  53.            "citation": {
  54.                "@type": "CreativeWork",
  55.                "name": "Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis",
  56.                "author": "Dr. Judith Mitchell",
  57.                "datePublished": "2025-02-05T15:45:48Z",
  58.                "url": "https://778787.mit-edu.top/post/5620139784"
  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://778787.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="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis" title="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis" class="author-pic img-fluid rounded-circle mx-auto">
  92.                    </div>
  93.                    <span class="d-block text-center">Judith Mitchell</span>
  94.                    <span class="date d-block text-center small text-uppercase text-black-50 mb-5">2025-02-05</span>
  95.                    <h2 class="heading text-center">Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis</h2>
  96.                    <p class="lead mb-4 text-center">Thanks to Judith Mitchell for contributing the article "Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis".
  97.                    </p>
  98.                    <img src="https://x.mit-edu.top/static/images/post/5.jpg" alt="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis" title="Modeling Long-Term Engagement in Mobile Games: Insights from Survival Analysis" class="img-fluid rounded mb-4 lazyload">
  99.                    <p>This research investigates the role of the psychological concept of "flow" in mobile gaming, focusing on the cognitive mechanisms that lead to optimal player experiences. Drawing upon cognitive science and game theory, the study explores how mobile games are designed to facilitate flow states through dynamic challenge-skill balancing, immediate feedback, and immersive environments. The paper also considers the implications of sustained flow experiences on player well-being, skill development, and the potential for using mobile games as tools for cognitive enhancement and education.</p>
  100. <p>This study investigates the environmental impact of mobile game development, focusing on energy consumption, resource usage, and sustainability practices within the mobile gaming industry. The research examines the ecological footprint of mobile games, including the energy demands of game servers, device usage, and the carbon footprint of game downloads and updates. Drawing on sustainability studies and environmental science, the paper evaluates the role of game developers in mitigating environmental harm through energy-efficient coding, sustainable development practices, and eco-friendly server infrastructure. The research also explores the potential for mobile games to raise environmental awareness among players and promote sustainable behaviors through in-game content and narratives.</p>
  101. <p>This study evaluates the efficacy of mobile games as gamified interventions for promoting physical and mental well-being. The research examines how health-related mobile games, such as fitness games, mindfulness apps, and therapeutic games, can improve players’ physical health, mental health, and overall quality of life. By drawing on health psychology and behavioral medicine, the paper investigates how mobile games use motivational mechanics, feedback systems, and social support to encourage healthy behaviors, such as exercise, stress reduction, and dietary changes. The study also reviews the effectiveness of gamified health interventions in clinical settings, offering a critical evaluation of their potential and limitations.</p>
  102. <p>This paper investigates the dynamics of cooperation and competition in multiplayer mobile games, focusing on how these social dynamics shape player behavior, engagement, and satisfaction. The research examines how mobile games design cooperative gameplay elements, such as team-based challenges, shared objectives, and resource sharing, alongside competitive mechanics like leaderboards, rankings, and player-vs-player modes. The study explores the psychological effects of cooperation and competition, drawing on theories of social interaction, motivation, and group dynamics. It also discusses the implications of collaborative play for building player communities, fostering social connections, and enhancing overall player enjoyment.</p>
  103. <p>This longitudinal study investigates the effectiveness of gamification elements in mobile fitness games in fostering long-term behavioral changes related to physical activity and health. By tracking player behavior over extended periods, the research assesses the impact of in-game rewards, challenges, and social interactions on players’ motivation and adherence to fitness goals. The paper employs a combination of quantitative and qualitative methods, including surveys, biometric data, and in-game analytics, to provide a comprehensive understanding of how game mechanics influence physical activity patterns, health outcomes, and sustained engagement.</p>
  104.  
  105.                    <p>
  106.                    <a href="/redirect/?url=https://778787.mit-edu.top/post/5620139784" 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://672933090322-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  114. <a href="https://493184625810-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  115. <a href="https://567199756950-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  116. <a href="https://350492632051-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  117. <a href="https://413095051770-gov.iliiili.com/" target="_blank" class="custom-link">External link</a>
  118. <a href="https://756351487426-gov.digwow.net/" target="_blank" class="custom-link">External link</a>
  119. <a href="https://790995146546-gov.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  120. <a href="https://052120295930-gov.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  121. <a href="https://179811581581-gov-edu.iliiili.com/" target="_blank" class="custom-link">External link</a>
  122. <a href="https://006751456679-gov-edu.digwow.net/" target="_blank" class="custom-link">External link</a>
  123. <a href="https://698292200192-gov-edu.free-giftcodes.com/" target="_blank" class="custom-link">External link</a>
  124. <a href="https://341500600285-gov-edu.gifthub.com.ru/" target="_blank" class="custom-link">External link</a>
  125. <a href="https://320097957886-edu.iliiili.com/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  126. <a href="https://106125350500-edu.digwow.net/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  127. <a href="https://570598031040-edu.free-giftcodes.com/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  128. <a href="https://736424034747-edu.gifthub.com.ru/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  129. <a href="https://382333380430-gov.iliiili.com/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  130. <a href="https://344548522164-gov.digwow.net/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  131. <a href="https://577052780024-gov.free-giftcodes.com/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  132. <a href="https://463516641095-gov.gifthub.com.ru/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  133. <a href="https://link.naver.com/bridge?957264722527&amp;url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  134. <a href="https://link.naver.com/bridge?706808244605&amp;url=https://naver706808244605-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  135. <a href="https://link.naver.com/bridge?260370975792&amp;url=https://naver260370975792-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  136. <a href="https://link.naver.com/bridge?174427107788&amp;url=https://naver174427107788-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  137. <a href="https://link.naver.com/bridge?613073609647&amp;url=https://naver613073609647-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  138. <a href="https://link.naver.com/bridge?744314521063&amp;url=https://naver744314521063-gov.digwow.net" target="_blank" class="custom-link">External link</a>
  139. <a href="https://link.naver.com/bridge?884562324731&amp;url=https://naver884562324731-gov.iliiili.com" target="_blank" class="custom-link">External link</a>
  140. <a href="https://link.naver.com/bridge?092067741172&amp;url=https://naver092067741172-gov.1717173.xyz" target="_blank" class="custom-link">External link</a>
  141. <a href="https://link.naver.com/bridge?535742120576&amp;url=https://naver535742120576-gov.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  142. <a href="https://link.naver.com/bridge?819282491698&amp;url=https://naver819282491698-gov-edu.digwow.net" target="_blank" class="custom-link">External link</a>
  143. <a href="https://link.naver.com/bridge?362589743217&amp;url=https://naver362589743217-gov-edu.iliiili.com" target="_blank" class="custom-link">External link</a>
  144. <a href="https://link.naver.com/bridge?429587269188&amp;url=https://naver429587269188-gov-edu.1717173.xyz" target="_blank" class="custom-link">External link</a>
  145. <a href="https://link.naver.com/bridge?337507443692&amp;url=https://naver337507443692-gov-edu.gifthub.com.ru" target="_blank" class="custom-link">External link</a>
  146. <a href="https://blog-666998631689.gifthub.news/" target="_blank" class="custom-link">External link</a>
  147. <a href="https://blog-315324168818.jp-edu.sbs/" target="_blank" class="custom-link">External link</a>
  148. <a href="https://blog-552922288887.kr-edu.sbs/" target="_blank" class="custom-link">External link</a>
  149. <a href="https://blog-741810751384.krlinkedin.sbs/" target="_blank" class="custom-link">External link</a>
  150. <a href="https://blog-890672538830.mit-edu.sbs/" target="_blank" class="custom-link">External link</a>
  151. <a href="https://blog-058947711993.mit-edu.buzz/" target="_blank" class="custom-link">External link</a>
  152. <a href="https://blog-978116595563.mit-edu.tech/" target="_blank" class="custom-link">External link</a>
  153. <a href="https://blog-727500616500.mit-edu.site/" target="_blank" class="custom-link">External link</a>
  154. <a href="https://blog-281471778689.mit-edu.top/" target="_blank" class="custom-link">External link</a>
  155. <a href="https://blog-239896279939.usa-gov.top/" target="_blank" class="custom-link">External link</a>
  156. <a href="https://research-091642770917.mit-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  157. <a href="https://research-094953986966.harvard-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  158. <a href="https://research-593496495560.stanford-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  159. <a href="https://research-848839639124.cambridge-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  160. <a href="https://research-422119768017.berkeley-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  161. <a href="https://research-767324308191.oxford-edu.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  162. <a href="https://research-155078520731-edu.wwv.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  163. <a href="https://research-718529396128-edu.sean.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" target="_blank" class="custom-link">External link</a>
  164. <a href="https://research-668487693200-edu.line.pp.ua/?url=https://778787.mit-edu.top/post/5620139784" 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://778787.mit-edu.top/post/5423871096">
  184.                            <img src="https://x.mit-edu.top/static/images/post/5.jpg" alt="The Role of Language in Enhancing Accessibility in Mobile Games" title="The Role of Language in Enhancing Accessibility in Mobile Games" class="img-fluid lazyload">
  185.                            </a>
  186.                        </div>
  187.                        <div class="content">
  188.                            <div class="post-meta mb-3">
  189.                                <a href="https://blog-5423871096.mit-edu.top/post/5423871096/" target="_blank">
  190.                                <span class="date">2025-02-05</span>
  191.                                </a>
  192.                            </div>
  193.                            <h2 class="heading"><a href="https://778787.mit-edu.top/post/5423871096">The Role of Language in Enhancing Accessibility in Mobile Games</a></h2>
  194.                            <p class="info">This paper analyzes the economic contributions of the mobile gaming industry to local economies, including job creation, revenue generation, and the development of related sectors such as tourism and retail. It provides case studies from various regions to illustrate these impacts.</p>
  195.                            <a href="https://778787.mit-edu.top/post/5423871096" 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 Language in Enhancing Accessibility in Mobile Games" title="The Role of Language in Enhancing Accessibility in Mobile Games" class="lazyload">
  198.                                </div>
  199.                                <div class="text">
  200.                                    <strong>Jacob Murphy</strong>
  201.                                    <span>2025-02-05 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://778787.mit-edu.top/post/1980754623">
  211.                            <img src="https://x.mit-edu.top/static/images/post/10.jpg" alt="Virtual Currency Inflation and Its Effects on Player Engagement" title="Virtual Currency Inflation and Its Effects on Player Engagement" class="img-fluid lazyload">
  212.                            </a>
  213.                        </div>
  214.                        <div class="content">
  215.                            <div class="post-meta mb-3">
  216.                                <a href="https://blog-1980754623.mit-edu.top/post/1980754623/" target="_blank">
  217.                                <span class="date">2025-02-05</span>
  218.                                </a>
  219.                            </div>
  220.                            <h2 class="heading"><a href="https://778787.mit-edu.top/post/1980754623">Virtual Currency Inflation and Its Effects on Player Engagement</a></h2>
  221.                            <p class="info">This study examines how mobile games can contribute to the development of smart cities, focusing on the integration of gaming technologies with urban planning, sustainability initiatives, and civic engagement efforts. The paper investigates the potential of mobile games to facilitate smart city initiatives, such as crowd-sourced data collection, environmental monitoring, and social participation. By exploring the intersection of gaming, urban studies, and IoT, the research discusses how mobile games can play a role in addressing contemporary challenges in urban sustainability, mobility, and governance.</p>
  222.                            <a href="https://778787.mit-edu.top/post/1980754623" class="post-author d-flex align-items-center">
  223.                                <div class="author-pic">
  224.                                    <img src="https://x.mit-edu.top/static/images/user/9.jpg" alt="Virtual Currency Inflation and Its Effects on Player Engagement" title="Virtual Currency Inflation and Its Effects on Player Engagement" class="lazyload">
  225.                                </div>
  226.                                <div class="text">
  227.                                    <strong>Gary Rivera</strong>
  228.                                    <span>2025-02-05 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://778787.mit-edu.top/post/5961473082">
  238.                            <img src="https://x.mit-edu.top/static/images/post/11.jpg" alt="Gamification as a Tool for Teaching Computational Ethics in STEM Education" title="Gamification as a Tool for Teaching Computational Ethics in STEM Education" class="img-fluid lazyload">
  239.                            </a>
  240.                        </div>
  241.                        <div class="content">
  242.                            <div class="post-meta mb-3">
  243.                                <a href="https://blog-5961473082.mit-edu.top/post/5961473082/" target="_blank">
  244.                                <span class="date">2025-02-05</span>
  245.                                </a>
  246.                            </div>
  247.                            <h2 class="heading"><a href="https://778787.mit-edu.top/post/5961473082">Gamification as a Tool for Teaching Computational Ethics in STEM Education</a></h2>
  248.                            <p class="info">A Comparative Analysis This paper provides a comprehensive analysis of various monetization models in mobile gaming, including in-app purchases, advertisements, and subscription services. It compares the effectiveness and ethical considerations of each model, offering recommendations for developers and policymakers.</p>
  249.                            <a href="https://778787.mit-edu.top/post/5961473082" class="post-author d-flex align-items-center">
  250.                                <div class="author-pic">
  251.                                    <img src="https://x.mit-edu.top/static/images/user/18.jpg" alt="Gamification as a Tool for Teaching Computational Ethics in STEM Education" title="Gamification as a Tool for Teaching Computational Ethics in STEM Education" class="lazyload">
  252.                                </div>
  253.                                <div class="text">
  254.                                    <strong>Scott Bennett</strong>
  255.                                    <span>2025-02-05 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