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  <front>
    <journal-meta>
      <journal-title-group>
        <journal-title>These authors contributed equally.
$ abdolali.faraji@tib.eu (A. Faraji); reza.tavakoli@tib.eu (M. Tavakoli); gabor.kismihok@tib.eu (G. Kismihók)</journal-title>
      </journal-title-group>
    </journal-meta>
    <article-meta>
      <title-group>
        <article-title>Goal-Driven Lifelong Learning through Personalized Search and Recommendation Services</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Abdolali Faraji</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Mohammadreza Tavakoli</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Gábor Kismihók</string-name>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Leibniz Information Centre for Science and Technology (TIB)</institution>
          ,
          <addr-line>Welfengarten 1 B, 30167 Hannover</addr-line>
          ,
          <country country="DE">Germany</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>2022</year>
      </pub-date>
      <volume>000</volume>
      <fpage>0</fpage>
      <lpage>0002</lpage>
      <abstract>
        <p>The need to keep your skills up to date is becoming more and more essential in the current, permanently changing educational world. At the same time, the number of published educational content on the web is continuously increasing, while the lack of metadata and proper quality control of educational content is becoming an important issue for the search engine providers and educational recommender systems. This status quo is highly problematic for learners on the one hand when it comes to finding the most suitable educational material for their desired skills. On the other hand, this has also made the maintenance of learning pathways a frustrating job for curricula developers. In this research, we are proposing a novel Human-AI based recommender system, which combines a learning dashboard, and an open learning content/curriculum curation dashboard into one unified system to tackle the problem of individual learning path creation and maintenance both for curricula developers and learners.</p>
      </abstract>
      <kwd-group>
        <kwd>eol&gt;lifelong learning</kwd>
        <kwd>personalized learning</kwd>
        <kwd>goal-driven learning</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Purpose</title>
      <p>
        In recent decades, we have faced a significant gap between the supply of learning content ofered
by educational systems, and what individuals actually need to learn to be able to carry out
their daily (including job-related and social-related) activities [
        <xref ref-type="bibr" rid="ref1 ref2">1, 2</xref>
        ]. The COVID-19 pandemic
intensified this challenge as due to the dramatic, and often existential situation of businesses in
a number of industries forced people to re-skill themselves online in order to remain employable
in post-COVID times [
        <xref ref-type="bibr" rid="ref3">3</xref>
        ]. As a consequence, lifelong learners need to monitor and update their
individual skill-sets regularly to remain employable [
        <xref ref-type="bibr" rid="ref4 ref5">4, 5</xref>
        ]. For instance, skills that are important
for ofering online services (e.g. software development and delivery), or soft skills related to
online collaboration and communication, are extremely demanded in the labor market [
        <xref ref-type="bibr" rid="ref6">6</xref>
        ] and
expected to play key roles in the near future.
      </p>
      <p>
        Subsequently, the regular updating of personal skill-sets and fast changes in the requirements
on the labor market side have made the process of creating and maintaining learning pathways
and individual curricula ineficient and time consuming for the learning content authors [
        <xref ref-type="bibr" rid="ref7">7</xref>
        ].
      </p>
      <p>As a consequence, there is a need for the development of educational systems which connect
learners with curricula developers eficiently. This system should 1. support curricula developers
in creating up-to-date learning pathways, and 2. provide the fittest educational recommendations
to the learners toward their learning goals.</p>
      <p>In this research we plan to help curricula developers to create diferent pathways by providing
insights on 1. skills required by the labour market, 2. learning topics that need to be covered
to achieve a skill, and 3. high-quality educational content to cover learning topics. From
the learners’ side, the created learning pathways are used to build a personalized learning
environment for each individual learner. Therefore, the main objectives of this research are:
• Proposing a method that facilitates the utilization of information on skills for learning
processes, based on timely labor market information.
• Decomposing those skills into meaningful learning objectives and their components
(skills, learning topics) and ofering individualized learning pathways for learners.
• Building a personalized educational content recommendation system that helps learners
to achieve their goals through recommended high quality educational content.
• Utilizing artificial intelligence to help authors and experts to create a high quality
knowledge base, which serves as a foundation to define a vast number of learning pathways.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Design</title>
      <p>As a starting point to design our system, we created a three-level structure for the learners
and content curators. Learning goals are on the top level, which consists of a set of skills.
Skills are then divided into learning topics. In the end, educational contents are gathered and
recommended based on learning topics for learners and curricula developers. This structure is
shown in Figure 1.</p>
      <p>Our approach to designing the aforementioned intelligent personalized recommender system
with respect to our three-level structure consists of two modules: Content Curation and Learning.</p>
      <sec id="sec-2-1">
        <title>2.1. Content Curation Module</title>
        <p>The Content Curation module was built in four steps with respect to our three-level structure
(i.e. learning goals, skills, and learning topics).</p>
        <p>First, we created a content curation dashboard based on a three-level structure. Curators
can add and maintain all three levels in the provided dashboard to create diferent paths for
learners. These paths are dynamic and can change over time which helps the learners to be
more up-to-date regarding their desired targets.</p>
        <p>
          Second, we built a dynamic goal-skill matching component to monitor the changes in the
skill-sets required by the labour market. The component mines the text of online job vacancies
(as a proxy for learning goals), extracts the skill-related sentences and uses TFIDF to extract
the skills. Afterward, the extracted skills will be sorted based on their repetition in the past six
months to show their importance [
          <xref ref-type="bibr" rid="ref8">8</xref>
          ].
        </p>
        <p>
          Third, we created a topic extractor method that decomposes a skill into learning topics.
We created models by applying various text-mining algorithms (e.g. TFIDF, Latent Dirichlet
Allocation, etc.) on the transcript of a large amount of educational content for a set of skills.
The component uses the created models to extract the topics from the educational resources
related to diferent skills [
          <xref ref-type="bibr" rid="ref9">9</xref>
          ].
        </p>
        <p>
          Fourth, we developed an educational content management component to help them cover
the learning topics, which 1. collects educational content from diferent educational content
repositories, 2. classifies them according to their target subjects using our topic extractor
component, and 3. validates the quality of their metadata and content using [
          <xref ref-type="bibr" rid="ref10">10</xref>
          ].
        </p>
        <p>The result of this AI-aided content curation module is shown in Figure 2.</p>
      </sec>
      <sec id="sec-2-2">
        <title>2.2. Learning Module</title>
        <sec id="sec-2-2-1">
          <title>We built the Learning module using various components in two steps.</title>
          <p>First, we created a learning environment which is built on top of the learning goals, skills, and
learning topics created and maintained by the curricula developers in content curation module
(described in Section 2.1). Learners can choose learning goals as their target, study the required
skills, and receive high-quality educational content for the respective learning topics. This
environment also allows the learners to start learning a single skill or even a single learning
topic.</p>
          <p>Second, in order to personalize the educational content provided to each learner, we created
a recommender system. This recommender system creates a user profile for learners based on
some key user preferences (e.g., preferences regarding diferent educational formats, length
of content, level of details, etc.). These preferences are gathered by asking questions from
the learners during their registration in the system. The recommendation system will try to
match the user profile with the metadata extracted from educational contents approved by
content curricula developers. Moreover, learners provide feedback (rate their satisfaction) after
completing each recommended educational content during the learning process. This helps our
system to capture any changes and fine tune users’ profiles over time.</p>
        </sec>
      </sec>
    </sec>
    <sec id="sec-3">
      <title>3. Results</title>
      <p>Based on our developed components, we built a prototype dashboard called eDoer1 which is
available to everyone (a screenshot of a part of the learning environment is shown in Figure 3
and a screenshot of recommendations in the content curation environment is shown in Figure
4). In the curator dashboard of eDoer, curricula developers can define pathways by combining
learning goals, skills, and learning topics. During the development and maintenance of these
items, authors are aided with AI recommendations. Our system collects high quality educational
content, which are relevant to the created learning topics. On the learning dashboard, each
learner can search through all added curricula for their learning needs on diferent levels
(learning goal, skill, or even learning topic). Then, they can add a list of learning goals, skills, and
topics to their learning dashboard. In response, the system provides personalized educational
content for each learner on the basis of their learning preferences. When content curators
update curricula, all these updates are announced to the learners immediately so they can
modify their learning pathway accordingly.</p>
      <p>
        We have validated our learning dashboard in two diferent experiments. First, we did a
preliminary validation in the Business Analytics course at the University of Amsterdam. The
evaluation results showed that those students who used our prototype dashboard (24 out of
94 students used it voluntarily) achieved higher grades than those who did not use it [
        <xref ref-type="bibr" rid="ref11">11</xref>
        ].
Second, we conducted an experiment in the context of fundamental engineering skill (i.e., Basic
Statistics) on 150 people in the Prolific platform 2 which is a commercial service provider for
connecting researchers with participants. All the test subjects were given a pre-test and then
we divided them into three groups 1. self-directed learners (not using eDoer for learning), 2.
non-personalized eDoer users (using eDoer with random recommendations), and 3. personalized
eDoer users (using eDoer with personalized recommendations) as shown in Table 1. After
learning the selected topics for approximately 105 minutes, a post-test was taken. The diference
between the post-test and pre-test scores was used as a measure of improvement in the selected
area of Basic Statistics. The results showed that eDoer significantly improves the results of
eDoer users (groups 2 and 3) compared to the self-directed users (group 1). It was also revealed
that our personalized recommendations can also improve the results of learning [
        <xref ref-type="bibr" rid="ref12">12</xref>
        ].
      </p>
    </sec>
    <sec id="sec-4">
      <title>4. Implications</title>
      <p>1http://www.edoer.eu
2https://www.prolific.co
This study is expected to empower lifelong learners to be able to autonomously work on their
skill development. At the same time, it allows curriculum developers to define learning goals,
skills, and learning topics faster, and keep up with emerging changes in the curriculum by
getting help from artificial intelligence. Moreover, the automatic quality control component can
help curriculum developers in validating the quality of their resources in various educational
content repositories. By using our method, education providers are also able to collect open
educational content with high-quality metadata and subsequently, ofer better recommendation
and search services. These services help learners to spend less time and efort in finding related,
high-quality educational content and also help authors to create and maintain the quality of
their educational content more eficiently.</p>
    </sec>
    <sec id="sec-5">
      <title>5. Acknowledgements</title>
      <sec id="sec-5-1">
        <title>The development of the our platform is supported by the following projects:</title>
        <p>• ADSEE - Applied Data Science Educational Ecosystem, European Commission - Erasmus</p>
        <p>Plus Programme
• OSCAR - Online, open learning recommendations and mentoring towards Sustainable
research CAReers, European Commission - Erasmus Plus Programme
• BIPER - Business Informatics Programme Reengineering, European Commission -
Erasmus Plus Programme
• ADAPT - Implementation of an Adaptive Continuing Education Support System in the</p>
        <p>Professional Field of Nursing German Federal Ministry of Education and Research
• WBsmart - AI-based digital continuing education space for elderly care, German Federal</p>
        <p>Ministry of Education and Research</p>
      </sec>
    </sec>
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