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Classification of Imbalanced Data Using Random Forest Algorithm with SMOTE and SMOTE-ENN (Case Study on Stunting Data
Jurnal Riset Sistem dan Teknologi Informasi
Vol 3
, No 2
(2025)
The random forest algorithm is one of the widely used machine learning classification methods because it has the advantage of reducing the risk of overfitting while improving general prediction performance. However, for data with unbalanced classes, this algorithm lacks to achieve its best performance, particularly in predicting data in the minority class. As a result, this article proposes two resampling approaches to balance the data: the Synthetic Minority Oversampling Technique (SMOTE) and t...
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Gambaran Kesiapsiagaan Pendaki terhadap Bencana Tanah Longsor di Gunung Lawu Kabupaten Karanganyar
ASJN (Aisyiyah Surakarta Journal of Nursing)
Vol 6
, No 1
(2025)
Latar Belakang: Kabupaten Karanganyar tercatat mengalami sedikitnya 92 kasus tanah longsor selama periode 2019–2021. Gunung Lawu, sebagai salah satu jalur pendakian favorit, termasuk dalam wilayah dengan risiko tinggi terhadap bencana tersebut. Meskipun jumlah pendaki terus meningkat, kajian mengenai tingkat kesiapsiagaan pendaki dalam menghadapi tanah longsor masih terbatas. Tujuan: Penelitian ini bertujuan mendeskripsikan tingkat kesiapsiagaan pendaki Gunung Lawu terhadap potensi bencana tanah...
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Evaluation ChatGPT User Sentiment using Naive Bayes: A Review of Confusion Matrix and Classification Report
Dianda Rifaldi
; Tri Stiyo Famuji
; Bella Okta Sari Miranda
; Fauzan Purma Ramadhan
; Iriene Putri Mulyadi
; Vanji Saputra6
; Fanani, Galih Pramuja Inngam
Jurnal Riset Sistem dan Teknologi Informasi
Vol 3
, No 2
(2025)
The development of artificial intelligence (AI) technology, particularly in natural language processing (NLP), has led to various innovations, including ChatGPT. Its growing popularity highlights the need for user sentiment analysis. This study evaluates user sentiment toward ChatGPT using the Naive Bayes algorithm. The dataset, obtained from Kaggle, consists of 500 labeled English tweets categorized as positive, neutral, or negative. The process involved text preprocessing, TF-IDF feature extra...
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Forward chaining Method for Early Detection of Mental Disorders
Jurnal Riset Sistem dan Teknologi Informasi
Vol 3
, No 2
(2025)
Mental disorders are specific conditions associated with symptoms and pain that cause disruptions in psychosocial functioning. In general, people who want to diagnose mental disorders need to meet directly with a doctor. This research aims to develop an expert system that can assist in the process of diagnosing mental disorders, where this system can produce decisions equivalent to those of a doctor, so that the public no longer needs to meet a doctor directly for initial diagnosis. This researc...
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Mapping Two Decades of Research on Faded Examples and Science Reasoning: Bibliometric Analysis Using VOSviewer
Jurnal Penelitian Pembelajaran Fisika
Vol 16
, No 3
(2025)
Scientific reasoning skills are key competencies in 21st-century science education. One learning strategy believed to promote the development of these skills is the faded example, which involves presenting examples whose solutions are gradually reduced to support students' independent thinking processes. This study aims to map trends and relationships between the faded example strategy and scientific reasoning through bibliometric analysis using VOSviewer. A total of 87 articles meeting the incl...
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Variasi Konsentrasi Emulgator Span-Tween 80 pada Body Scrub Ampas Kelapa (Cocos nucifera L.) dan Ekstrak Biji Alpukat (Persea americana mill)
Kunir: Jurnal Farmasi Indonesia
Vol 3
, No 1
(2025)
Body scrub merupakan sediaan kosmetik untuk kecantikan yang bermanfaat untuk melembutkan dan mengangkat sel kulit mati. Ampas kelapa mengandung serat kasar yang digunakan sebagai scrub agent dan biji alpukat mengandung vitamin E yang dapat digunakan untuk perawatan kulit. Salah satu bahan yang digunakan pada sediaan body scrub didalamnya terdapat bahan span-tween 80 yang berfungsi sebagai emulgator. Penelitian ini dibuat untuk mengetahui sebesar apa pengaruh variasi konsentrasi emulgat...
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Hubungan Pengetahuan terhadap Perilaku Penggunaan Kosmetik Mengandung Merkuri pada Mahasiswa di DIY
Kunir: Jurnal Farmasi Indonesia
Vol 3
, No 1
(2025)
Penggunaan kosmetika merupakan bagian yang tak terpisahkan dari kehidupan sehari-hari, terutama di kalangan mahasiswa. Namun, perlu diperhatikan bahwa beberapa produk kosmetika mengandung bahan berbahaya seperti merkuri. Tujuan penelitian ini adalah untuk mengetahui hubungan tingkat pengetahuan terhadap perilaku penggunaan kosmetik mengandung merkuri pada mahasiswa...
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PEMANFAATAN KARBON SISA HASIL PEMBENTUKAN KRISTAL LIMBAH TULANG IKAN TENGGIRI (SCOMBEROMORUS COMMERSON LACEPEDE) DAN IKAN BELIDA (CHITALA LOPIS) UNTUK MENGADSORPSI ZAT WARNA SINTETIK CONGO RED
Ramadani, Pino
; Fransiska, Firnanda Zuni
; Putri, Aisyah Adinda
; Maharani, Tiara
; Syahputri, Salsabila Dia
; Rahmadani, Fitri Nur
; Wirhanuddin, Wirhanuddin
; Nurhadi, Mukhamad
Jurnal Inovasi Teknik Kimia
Vol 10
, No 3
(2025)
To date, industrial wastewater treatment efforts have largely relied on conventional methods that are sensitive to environmental changes and less effective in degrading complex dyes such as Congo Red. One promising alternative approach is adsorption using biomass-based activated carbon, including waste derived from fish bones. This study aims to investigate the properties, surface characteristics, and adsorption mechanism of residual carbon obtained from crystal formation processes using waste b...
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PENGARUH KOMBINASI MALTODEKSTRIN-KITOSAN PADA EDIBLE COATING UNTUK MEMPERTAHANKAN KUALITAS BUAH APEL POTONG
Jurnal Inovasi Teknik Kimia
Vol 10
, No 3
(2025)
The browning of freshly sliced apples greatly diminishes their quality and attractiveness to consumers. Edible coatings offer a viable solution for maintaining the quality and prolonging the shelf life of cut fruit. This research examined the impact of combining maltodextrin and chitosan in edible coatings on the quality of fresh-cut apples. The dip-coating technique was utilized to apply the coating. A Completely Randomized Design (CRD) with two factors was used, featuring various maltodextrin...
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OPTIMALISASI PROSES EKSTRAKSI MINYAK KAYU PUTIH MELALUI METODE RE-DISTILASI DALAM SKALA LABORATORIUM DAN PILOT PLANT
Sufra, Rifqi
; Shabira, Cika Amalia
; Firjatullah, Aiman
; Alhanif, Misbahudin
; Darojat, Yusron
; Saputri, Desi Riana
; Alfionita, Vina
; Sheldian, Rizki
; Nareswari, Tantri Liris
Jurnal Inovasi Teknik Kimia
Vol 10
, No 3
(2025)
Cajuput oil is an essential oil of high economic value and is widely used in the pharmaceutical and health industries. However, national production remains suboptimal, partly due to the low 1,8-cineole content. This study aims to compare improvements in cajuput oil quality achieved through laboratory-scale and pilot-scale redistillation processes. Redistillation was applied to cajuput oil obtained from the initial distillation, using young leaves, mature leaves, and mixed leaves as raw materials...
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