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<h1 class="title toc-ignore">Insights from a Public Lecture: Word Cloud
Analysis</h1>
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<p><br></p>
<div style="text-align: center;">
<p><img src="resources/Public%20Lecture%20at%20FISIP%20UPNVJ.jpg" alt="Public Lecture at FISIP UPNVJ" style="width: 50%;"/></p>
</div>
<p><br></p>
<p>For this task, our objective is to visualize the key points and
themes from a public lecture delivered by the Secretary General of the
National Energy Council. This lecture, held on May 29, 2024, at FISIP
UPNVJ, covers critical topics related to energy policy and strategy. To
achieve this, we first attended and recorded the lecture. Here is the
recording file: <a href="resources/Kuliah%20umum.mp3">Kuliah
umum.mp3</a>.</p>
<p>Next, we transcribed the recording into a text file, which can be
accessed here: <a href="resources/transkrip.txt">transkrip.txt</a>.
Using this transcript, we created a word cloud visualization to
highlight the most frequently discussed words and phrases from the
lecture. This visualization provides a quick and impactful way to
understand the main topics and issues emphasized by the speaker,
offering valuable insights into the current discourse on national energy
policies.</p>
<p><br></p>
<div id="load-required-libraries" class="section level2">
<h2>Load required libraries</h2>
<pre class="r"><code># Load the required libraries
library(tm)
library(wordcloud)
library(RColorBrewer)</code></pre>
<p><br></p>
</div>
<div id="data-preprocessing" class="section level1">
<h1>Data Preprocessing</h1>
<pre class="r"><code># Read the text file
text <- readLines("resources/transkrip.txt", encoding = "UTF-8")
# Create a corpus
corpus <- Corpus(VectorSource(text))</code></pre>
<p><br></p>
</div>
<div id="data-cleaning" class="section level1">
<h1>Data Cleaning</h1>
<pre class="r"><code># Define a list of Indonesian stopwords
stopwords_id <- c("yang", "dan", "di", "ke", "dari", "ini", "itu", "dengan", "untuk", "pada", "adalah", "sebagai", "dalam", "tidak", "akan", "atau", "juga", "oleh", "sudah", "kami", "karena", "pada", "tersebut", "dapat", "antara", "saya", "ia", "namun", "lebih", "seperti", "bagi", "oleh", "mereka", "setelah", "jika", "saat", "hingga", "kami", "kita", "terus", "speaker", "1", "0")
# Text cleansing
corpus <- tm_map(corpus, content_transformer(tolower)) # Convert to lowercase
corpus <- tm_map(corpus, removePunctuation) # Remove punctuation
corpus <- tm_map(corpus, removeNumbers) # Remove numbers
corpus <- tm_map(corpus, removeWords, stopwords_id) # Remove Indonesian stopwords
corpus <- tm_map(corpus, stripWhitespace) # Strip whitespace</code></pre>
<p><br></p>
</div>
<div id="wordcloud-visualization" class="section level1">
<h1>Wordcloud Visualization</h1>
<pre class="r"><code># Create a term-document matrix
tdm <- TermDocumentMatrix(corpus)
# Convert the term-document matrix into a matrix
m <- as.matrix(tdm)
# Get word frequencies
word_freqs <- sort(rowSums(m), decreasing = TRUE)
# Create a data frame with words and their frequencies
word_freqs_df <- data.frame(word = names(word_freqs), freq = word_freqs)
# Generate the word cloud
set.seed(1234) # for reproducibility
wordcloud(words = word_freqs_df$word, freq = word_freqs_df$freq,
min.freq = 2, max.words = 200,
random.order = FALSE, rot.per = 0.35,
colors = brewer.pal(8, "Dark2"))</code></pre>
<p><img src="Task-3_files/figure-html/unnamed-chunk-4-1.png" width="672" /></p>
<p><br></p>
</div>
<div id="commentary" class="section level1">
<h1>Commentary</h1>
<p><br></p>
<div id="key-terms" class="section level4">
<h4>Key Terms</h4>
<ul>
<li><strong>Energi</strong> (Energy): The most prominent term,
indicating the primary focus of the lecture.</li>
<li><strong>Target</strong> (Goals), <strong>Kebijakan</strong>
(Policy), <strong>Emisi</strong> (Emissions),
<strong>Pemerintah</strong> (Government): These terms suggest important
topics discussed in the lecture, such as setting and achieving targets,
government policies, and emission reductions.</li>
<li><strong>Penggunaan</strong> (Usage), <strong>Minyak</strong> (Oil),
<strong>Mencapai</strong> (Achieving), <strong>Tahun</strong> (Year),
<strong>Peningkatan</strong> (Increase), <strong>Berbagai</strong>
(Various), <strong>Selain</strong> (Besides), <strong>Listrik</strong>
(Electricity): Indicate discussions around the usage of energy, the role
of oil and electricity, timelines, various aspects of energy policies,
and efforts to achieve goals.</li>
<li><strong>Teknologi</strong> (Technology), <strong>Bersih</strong>
(Clean), <strong>Transisi</strong> (Transition),
<strong>Industri</strong> (Industry), <strong>Implementasi</strong>
(Implementation), <strong>Masyarakat</strong> (Community/Society),
<strong>Produksi</strong> (Production), <strong>Rencana</strong> (Plan):
Indicate discussions around technological advancements, clean energy,
transitioning to renewable sources, the industrial aspect,
implementation strategies, community involvement, production methods,
and planning.</li>
</ul>
</div>
<div id="themes" class="section level4">
<h4>Themes</h4>
<ul>
<li>Government and Policy: The presence of <strong>pemerintah</strong>
and <strong>kebijakan</strong> indicates the role of governmental
policies in shaping the energy landscape.</li>
<li>Renewable Energy Transition: The frequent mention of
<strong>mengurangi</strong> and <strong>meningkatkan</strong> implies
discussions on transitioning from fossil fuels to renewable energy
sources.</li>
<li>Technological Innovations: Terms like <strong>teknologi</strong> and
<strong>produksi</strong> suggest a focus on technological solutions and
innovations in energy production.</li>
<li>Emission Reductions: Emphasis on <strong>emisi</strong> and related
terms indicates a significant focus on reducing emissions and
environmental impact.</li>
</ul>
</div>
<div id="implications" class="section level4">
<h4>Implications</h4>
<ul>
<li>Focus on Sustainability: The word cloud highlights the emphasis on
sustainability, reducing emissions, and increasing the use of renewable
energy.</li>
<li>Policy and Governance: It underscores the importance of government
intervention and policy-making in achieving renewable energy goals.</li>
<li>Technological Advancements: The discussion likely includes
innovations and advancements in technology to support energy production
and efficiency.</li>
<li>Public Awareness and Education: The varied terms indicate a
comprehensive discussion aimed at educating the public on various
aspects of renewable energy, from technical details to policy
measures.</li>
</ul>
</div>
</div>
</div>
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