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Implementation of XGBoost Ensemble and Support Vector Machine For Gender Classification of Skull Bones Ramadhani, Astrid; Afrianty, Iis; Budianita, Elvia; Gusti, Siska Kurnia
Bulletin of Informatics and Data Science Vol 4, No 1 (2025): May 2025
Publisher : PDSI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61944/bids.v4i1.115

Abstract

Sex identification based on skull bones is an important step in forensic anthropology, especially in cases where unidentified human skeletons are found. Conventional methods such as DNA analysis are often used, but have limitations, especially when the bones are damaged, charred or decayed, making the analysis process difficult. This research applies XGBoost ensemble and Support Vector Machine for sex classification on skull bones. The purpose of this research is to handle complex data with many features and unbalanced data using the XGBoost ensemble method and Support Vector Machine (SVM). The data used consisted of 2,524 samples with 82 measurement features. Model performance was evaluated using accuracy, precision, recall, and F1 score metrics. The results showed that the combination of XGBoost and SVM methods, especially with the RBF kernel, was able to achieve accuracy of up to 91.52%. This finding proves that machine learning-based approaches can be an effective and reliable solution in supporting the forensic identification process
Diabetes Classification using Gain Ratio Feature Selection in Support Vector Machine Method Al Rasyid, Nabila; Afrianty, Iis; Budianita, Elvia; Kurnia Gusti, Siska
Bulletin of Informatics and Data Science Vol 4, No 1 (2025): May 2025
Publisher : PDSI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61944/bids.v4i1.114

Abstract

Diabetes is a major cause of many chronic diseases such as visual impairment, stroke and kidney failure. Early detection especially in groups that have a high risk of developing diabetes needs to be done to prevent problems that have a wide impact. Indonesia is ranked seventh in the world with a prevalence of 10.7% of the total number of people with diabetes. This research aims to determine the attributes in the diabetes dataset that most affect the classification and apply the Support Vector Machine method for diabetes classification. For the determination process, Gain Ratio feature selection technique is applied. The dataset used consists of 768 data with 8 attributes. In this classification process, 3 SVM kernels (Linear, Polynomial, and RBF) are used with three possible data divisions using the ratio (70:30; 80:20; 90:10). Before applying feature selection, there were 8 attributes used and achieved the highest accuracy of 94.81% at a ratio of 80:20 using the RBF kernel with a combination of two parameters namely C = 100, Gamma = 3 and C = 100, Gamma = Scale.  Feature selection parameters in the form of thresholds used include 0.02; 0.03; and 0.05. After applying feature selection, the attribute that produces the highest accuracy uses 6 attributes. The highest accuracy after applying feature selection reached 95.45% at a threshold of 0.02 with a ratio of 80:20 using the RBF kernel with parameters C = 100 and Gamma = Scale. The results showed that there was an increase in accuracy after applying feature selection
KLASIFIKASI PENYAKIT GINJAL KRONIS MENGGUNAKAN INFORMATION GAIN DAN LVQ Putri, Widya Maulida; Budianita, Elvia; Syafria, Fadhilah; Afrianty, Iis
Journal of Information System Management (JOISM) Vol. 7 No. 1 (2025): Juni
Publisher : Universitas Amikom Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24076/joism.2025v7i1.2102

Abstract

Penyakit Ginjal Kronis (PGK) terjadi ketika fungsi ginjal menurun secara bertahap selama lebih dari tiga bulan tanpa penyebab yang jelas. Penelitian ini bertujuan mengklasifikasikan PGK dengan menggunakan seleksi fitur Information Gain dan Learning Vector Quantization (LVQ). Dataset yang digunakan terdiri dari 1659 data dengan 53 atribut. Proses penelitian meliputi preprocessing data, penerapan SMOTE Oversampling, seleksi fitur Information Gain, dan penerapan model LVQ. Pengujian menghasilkan akurasi tertinggi sebesar 93,37% tanpa seleksi fitur, serta 36 fitur terpilih dengan threshold 0,3 setelah seleksi fitur. Learning rate digunakan antara 0,1 hingga 0,9, min learning rate 0,001, dan pengurangan alpha 0,1. Penggunaan SMOTE dan LVQ meningkatkan nilai presisi, recall, dan f1 score, tetapi akurasi menurun menjadi 84,59%. Hasil ini menunjukkan bahwa metode LVQ efektif dalam klasifikasi penyakit ginjal kronis, membantu ahli identifikasi penyakit ginjal kronis menggunakan data mining dan Jaringan Syaraf Tiruan.
Penerapan Information Gain Untuk Seleksi Fitur Pada Klasifikasi Jenis Kelamin Tulang Tengkorak Menggunakan Backpropagation Khair, Nada Tsawaabul; Afrianty, Iis; Syafria, Fadhilah; Budianita, Elvia; Gusti, Siska Kurnia
Bulletin of Computer Science Research Vol. 5 No. 4 (2025): June 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/bulletincsr.v5i4.637

Abstract

Forensic anthropology and skull analysis play a crucial role in the biological identification of individuals, including sex determination. This study aims to improve the accuracy of gender classification based on skull structure by combining the Information Gain feature selection method with the Backpropagation algorithm. The dataset used is the craniometric data compiled by William W. Howells, consisting of 2,524 samples with 85 measurement features. The preprocessing stage includes data selection, data cleaning, and normalization. Feature selection was conducted using the Information Gain method with three threshold values: 0.01, 0.05, and 0.1, resulting in 79, 46, and 38 selected features, respectively. The model was evaluated using the K-Fold Cross Validation method with K=10 and K=20. The highest accuracy of 93.91% was achieved at the 0.01 threshold using the Backpropagation architecture [79:119:1], a learning rate of 0.01, and K=20. These results demonstrate that feature selection using Information Gain enhances the performance of the Backpropagation model by eliminating irrelevant features and minimizing the risk of overfitting.
PENERAPAN METODE INFORMATION GAIN DAN LEARNING VECTOR QUANTIZATION 3 PADA KLASIFIKASI PENYAKIT GINJAL Aprima, Muhammad Dzaky; Budianita, Elvia; Syafria, Fadhilah; Afrianty, Iis
Information System Journal Vol. 8 No. 01 (2025): Information System Journal (INFOS)
Publisher : Universitas Amikom Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24076/infosjournal.2025v8i01.2117

Abstract

Penyakit Ginjal Kronis (PGK) adalah penyakit yang ditunjukkan dengan turunnya fungsi ginjal yang disebabkan oleh penumpukan sisa metabolik dan berakibat tidak berfungsinya ginjal. Prediksi penyakit ini dengan data mining berperan penting dalam upaya pencegahan penyakit ini. Penelitian ini menerapkan seleksi fitur information gain pada metode Learning Vector Quantization 3 (LVQ3) dalam mengklasifikasikan penyakit ginjal kronis. Pengujian dilakukan 5 skenario pengujian dengan jumlah data sebanyak 1659 data dan 53 atribut. Seleksi fitur menerapkan information gain dengan threshold 0,3 dengan 36 fitur terpilih dan 0,7 dengan 33 fitur terpilih. Model diuji dengan kombinasi parameter learning rate dan window serta dievaluasi menggunakan akurasi, presisi, recall, dan F1-Score. Hasil akurasi tertinggi diperoleh tanpa menerapkan seleksi fitur sebesar 92,77%. Setelah seleksi fitur, akurasi menurun menjadi 86,45%. Kombinasi SMOTE dan seleksi fitur pada threshold 0,3 menurunkan akurasi hingga 81,64%. Hasil penelitian berhasil menerapkan LVQ 3 dalam klasifikasi penyakit ginjal kronis.
IMPLEMENTASI LEARNING VECTOR QUANTIZATION 2 DAN INFORMATION GAIN UNTUK KLASIFIKASI PENYAKIT GINJAL KRONIS Zabihullah, Fayat; Budianita, Elvia; Syafria, Fadhilah; Afrianty, Iis
Information System Journal Vol. 8 No. 01 (2025): Information System Journal (INFOS)
Publisher : Universitas Amikom Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24076/infosjournal.2025v8i01.2118

Abstract

Penyakit ginjal kronis terjadi ketika ginjal gagal mempertahankan metabolisme dan keseimbangan tubuh, serta memiliki risiko kematian yang tinggi. Analisis dan prediksi menggunakan teknik klasifikasi data dapat membantu mengurangi risiko tersebut. Penelitian ini bertujuan untuk mengklasifikasikan penyakit ginjal kronis dengan menggabungkan metode seleksi fitur Information Gain dan algoritma Learning Vector Quantization 2 (LVQ2). Dataset yang digunakan terdiri dari 1.659 data dengan 53 atribut dan 1 label kelas. Tahapan penelitian meliputi preprocessing, seleksi fitur, normalisasi, dan klasifikasi. Seleksi fitur dilakukan berdasarkan nilai Information Gain dengan threshold tertentu. Model diuji dengan kombinasi parameter learning rate dan window, serta dievaluasi menggunakan akurasi, presisi, recall, dan F1-score. Hasil terbaik diperoleh tanpa seleksi fitur dengan akurasi 93,98%. Setelah seleksi fitur, akurasi menurun sedikit menjadi 93,37%. Kombinasi Smote dan seleksi fitur meningkatkan presisi, recall, dan F1 score, namun menurunkan akurasi hingga menjadi 80,00% pada threshold 0,7 dengan fitur terpilih 33.
Perbandingan Inisialisasi Bobot Random dan Nguyen-Widrow Pada Backpropagation Dalam Klasifikasi Penyakit Diabetes Guswanti, Widya; afrianty, iis; budianita, elvia; syafria, fadhilah
Jurnal Informatika: Jurnal Pengembangan IT Vol 10, No 2 (2025)
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v10i2.8618

Abstract

Diabetes is a metabolic disorder that occurs when the pancreas is unable to produce adequate amounts of insulin or the body has difficulty in utilizing it optimally. This condition has the potential to cause various health complications. Therefore, early diagnosis of diabetes is very important to reduce the mortality rate due to these complications. Backpropagation Neural Network (BPNN) is an approach in Artificial Neural Network (ANN) that is commonly applied for disease classification, including diabetes. However, the BPNN method has drawbacks, namely its slow convergence rate and the possibility of getting stuck at a local minimum due to random weight initialization. To overcome these problems, this study applies the Nguyen-Widrow weight initialization method to improve the performance of BPNN in diabetes classification. The data source in this study comes from Kaggle, consisting of 768 data with 8 parameters. Model testing was conducted using k-fold cross-validation with K=10, and exploring various numbers of neurons in the hidden layer and learning rate (lr). The results showed that weight initialization using the Nguyen-Widrow method improved the accuracy of BPNN compared to random weight initialization. The best model was obtained with lr 0.001 and 15 neurons in the hidden layer, resulting in an accuracy of 91.23%, higher than the random weight initialization which only reached 89.91%. Thus, the Nguyen-Widrow method is proven effective in improving the performance of BPNN for diabetes classification.Diabetes merupakan gangguan metabolik yang terjadi ketika pankreas tidak mampu menghasilkan insulin dalam jumlah yang memadai atau tubuh mengalami kesulitan dalam memanfaatkannya secara optimal. Kondisi ini berpotensi menimbulkan beragam komplikasi kesehatan. Oleh karena itu, diagnosis dini penyakit diabetes sangat penting untuk menekan angka kematian akibat komplikasi tersebut. Backpropagation Neural Network (BPNN) adalah pendekatan dalam Jaringan Syaraf Tiruan (JST) yang umum diterapkan untuk klasifikasi penyakit, termasuk diabetes. Namun, metode BPNN memiliki kekurangan, yaitu laju konvergensinya yang lambat dan kemungkinan terjebak pada minimum lokal akibat inisialisasi bobot yang dilakukan secara random. Untuk mengatasi permasalahan tersebut, penelitian ini menerapkan metode inisialisasi bobot Nguyen-Widrow guna meningkatkan performa BPNN dalam klasifikasi diabetes. Sumber data dalam penelitian ini berasal dari Kaggle, terdiri dari 768 data dengan 8 parameter. Pengujian model dilakukan menggunakan k-fold cross-validation dengan K=10, serta mengeksplorasi berbagai jumlah neuron dalam hidden layer dan learning rate (lr). Hasil penelitian menunjukkan bahwa inisialisasi bobot menggunakan metode Nguyen-Widrow meningkatkan akurasi BPNN dibandingkan dengan inisialisasi bobot random. Model terbaik diperoleh dengan lr 0,001 dan 15 neuron pada hidden layer, menghasilkan akurasi sebesar 91,23%, lebih tinggi dibandingkan inisialisasi bobot random yang hanya mencapai 89,91%. Dengan demikian, metode Nguyen-Widrow terbukti efektif dalam meningkatkan performa BPNN untuk klasifikasi diabetes.
Klasifikasi Tulang Tengkorak Berdasarkan Jenis Kelamin Menggunakan Correlation-Based Feature Selection (CFS) dengan Backpropagation Neural Network (BPNN) Ma'rifah, Laila Alfi; Afrianty, Iis; Budianita, Elvia; Syafria, Fadhilah
Jurnal Informatika: Jurnal Pengembangan IT Vol 10, No 2 (2025)
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v10i2.8616

Abstract

Abstract – In forensic anthropology, sex identification is the initial step in individual identification, with a probability level of 50%, influencing subsequent examinations such as age and height estimation. The skull is the second-best choice after the pelvis for determining sex, with an accuracy of up to 90%. Morphological and metric methods are less reliable due to the high variability of skulls, while DNA analysis is ineffective on burned or damaged bones. Therefore, this study applies Correlation-Based Feature Selection (CFS) with a Backpropagation Neural Network (BPNN) to improve classification accuracy. The dataset used originates from Dr. William Howells, consisting of 2,524 skull samples with 85 variables. CFS was applied with two thresholds, 0.1 and 0.01, and the division of training data and test data using k-fold cross validation with k=10. The BPNN parameters included learning rates of 0.01 and 0.001, along with three different architectures based on the number of input neurons. The results indicate that CFS improved accuracy from 92.06% to 93.25% under the CFS threshold of 0.01, with a learning rate of 0.001 and a BPNN architecture of [72; 95; 1]. This study confirms that combining CFS and BPNN enhances sex classification accuracy based on skull bones.Abstrak – Pada antropologi forensik, identifikasi jenis kelamin adalah langkah awal dalam mengidentifikasi individu dengan tingkat probabilitas 50%, yang berpengaruh pada pemeriksaan lain seperti perkiraan usia dan tinggi badan. Tulang tengkorak menjadi pilihan terbaik kedua setelah tulang panggul dalam menentukan jenis kelamin dengan akurasi hingga 90%. Metode morfologi dan metrik kurang dapat diandalkan karena variabilitas tengkorak yang tinggi, sementara analisis DNA tidak efektif pada tulang yang terbakar atau rusak. Oleh karena itu, penelitian ini menerapkan Correlation-Based Feature Selection (CFS) dengan Backpropagation Neural Network (BPNN) untuk meningkatkan akurasi klasifikasi. Dataset yang digunakan berasal dari Dr. William Howells, terdiri dari 2.524 sampel tengkorak dengan 85 variabel. Pada CFS digunakan dua ambang batas yaitu 0,1 dan 0,01, serta pembagian data latih dan uji data menggunakan k-fold cross validation dengan k=10. Parameter BPNN yang digunakan meliputi learning rate (0,01 dan 0,001) serta tiga arsitektur berbeda sesuai dengan jumlah neuron input. Hasil menunjukkan bahwa CFS meningkatkan akurasi dari 92,06% menjadi 93,25% pada konfigurasi ambang batas CFS 0,01 dengan learning rate 0,001 dan arsitektur BPNN [72; 95; 1]. Penelitian ini menunjukkan bahwa kombinasi CFS dan BPNN dapat meningkatkan akurasi klasifikasi jenis kelamin berdasarkan tulang tengkorak.
Analisis Faktor-Faktor yang Berhubungan dengan Kejadian Stunting pada Balita Usia 24–59 Bulan di Kelurahan Saragi Kabupaten Buton Saputri, Ekawati; Afrianty, Iis; Teluk, Grace Tedy; Susanti, Risqi Wahyu
Malahayati Nursing Journal Vol 7, No 11 (2025): Volume 7 Nomor 11 (2025)
Publisher : Universitas Malahayati Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/mnj.v7i11.21111

Abstract

ABSTRACT Stunting remains a chronic nutritional problem that has a major impact on children's quality of life, both in the short and long term. This condition describes linear growth disorders due to inadequate nutritional intake over a long period of time, repeated infections, an unsupportive environment, and suboptimal parenting. This study aims to assess the factors associated with the incidence of stunting in children under the age of 24-59 months who live in Saragi Village, Pasarwajo Health Centre working area, Buton Regency. The research design used a cross-sectional approach involving 45 purposively selected toddlers. Data were collected through interviews using a structured questionnaire and height measurements. Analyses were conducted univariately, bivariately (with chi-square test), and multivariately using logistic regression. Results showed that the prevalence of stunting was very high at 77.8%. Although no statistically significant association was found between stunting and factors such as immunisation status, history of infection, and exclusive breastfeeding, there was a trend that children who were not exclusively breastfed, had not been fully immunised, or had a history of infectious diseases were more prone to stunting. In addition, socioeconomic aspects such as maternal employment and family income also contribute to the incidence of stunting. These findings suggest that stunting is a complex problem that requires a cross-sectoral response, through a community approach that focuses on nutrition education, improving access to health services, economic support, and strengthening the role of the family. Keywords: Stunting, Toddlers, Exclusive Breastfeeding, Immunization, Nutritional Status.  ABSTRAK Stunting masih menjadi persoalan gizi kronis yang berdampak besar terhadap kualitas hidup anak, baik dalam jangka pendek maupun panjang. Kondisi ini menggambarkan gangguan pertumbuhan linear akibat asupan gizi yang tidak adekuat dalam jangka waktu lama, infeksi yang berulang, lingkungan yang tidak mendukung, serta kurang optimalnya pola asuh. Penelitian ini bertujuan untuk mengkaji faktor-faktor yang memiliki keterkaitan dengan kejadian stuntingpada anak balita usia 24–59 bulan yang berdomisili di Kelurahan Saragi, wilayah kerja Puskesmas Pasarwajo, Kabupaten Buton. Desain penelitian menggunakan pendekatan cross-sectional dengan melibatkan 45 balita yang dipilih secara purposif. Data dikumpulkan melalui wawancara menggunakan kuesioner terstruktur dan pengukuran tinggi badan. Analisis dilakukan secara univariat, bivariat (dengan uji chi-square), dan multivariat menggunakan regresi logistik. Hasil menunjukkan bahwa prevalensi stunting sangat tinggi, yaitu 77,8%. Meskipun tidak ditemukan hubungan statistik yang signifikan antara stunting dan faktor seperti status imunisasi, riwayat infeksi, serta pemberian ASI eksklusif, ditemukan kecenderungan bahwa anak-anak yang tidak menerima ASI eksklusif, belum diimunisasi lengkap, atau memiliki riwayat penyakit infeksi lebih rentan mengalami stunting. Selain itu, aspek sosial ekonomi seperti pekerjaan ibu dan pendapatan keluarga juga berkontribusi terhadap kejadian stunting. Temuan ini menunjukkan bahwa stunting merupakan masalah kompleks yang membutuhkan penanganan lintas sektor, melalui pendekatan komunitas yang terfokus pada edukasi gizi, peningkatan akses layanan kesehatan, dukungan ekonomi, dan penguatan peran keluarga. Kata Kunci: Stunting, Balita, ASI Eksklusif, Imunisasi, Status Gizi
Pengelompokkan Tingkat Stres Akademik Pada Mahasiswa Menggunakan Algoritma Fuzzy C-Means Alfaiza, Raihan Zia; Budianita, Elvia; Gusti, Siska Kurnia; Afrianty, Iis
TIN: Terapan Informatika Nusantara Vol 6 No 5 (2025): October 2025
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/tin.v6i5.8460

Abstract

Academic stress is a common problem experienced by students due to the burden of assignments, exams, and social pressures. If not managed properly, it can impact achievement and psychological well-being. This study aims to classify the academic stress levels of students at the Faculty of Science and Technology, Sultan Syarif Kasim State Islamic University, Riau, using the Fuzzy C-Means (FCM) algorithm, which allows flexibility in the degree of data membership in more than one cluster. Data were obtained from a modified Perception of Academic Stress Scale (PASS) questionnaire, with 587 respondents from the 2021–2024 intake. The research stages included data selection, cleaning, and transformation, application of the FCM algorithm, and evaluation using three validation metrics: the Partition Coefficient Index (PCI), the Fuzzy Silhouette Index (FSI) and the Silhouette Coefficient. The test results showed the optimal number of clusters at C = 2, with the highest PCI value of 0.5663, FSI and ilhouette Coefficient score of 0.3056, resulting in two groups of students: 313 with high stress levels and 274 with low stress levels. The decrease in PCI, FSI and Silhouette scores across a larger number of clusters indicates that dividing two clusters provides the clearest grouping structure. These findings demonstrate that the FCM algorithm is effective in mapping students' academic stress patterns and can be used as a basis for designing more targeted academic mentoring strategies, counseling services, and psychological intervention programs services.
Co-Authors Adiya, M. Hasmil Afriyanti, Liza Aftari, Dhea Putri Agnesti, Syafira Al Rasyid, Nabila Alfaiza, Raihan Zia Alghi, Anugerah Febryan Aprima, Muhammad Dzaky Arianto Arianto Arif, Arif Prasetya Ayu Lestari, Fajar Vilbra Azhima, Mohd Baeda, Abd. Gani Baehaqi Bangu, Bangu Burhanuddin, Yuniarti Ekasaputri Butar-Butar, Rio Juan Hendri Dewi Nasien Dinata, Ferdian Arya Elvia Budianita Fadhilah Syafria Fahrozi, Aqshol Al Farkhan, Mochammad Febi Yanto Fitri Insani Fitri, Anisa Gusti, Siska Kurnia Guswanti, Widya Hamid, Fanul Hariansyah, Jul Harni, Yulia Hasibuan, Aldiansyah Pramudia Hasidu, La Ode Abdul Fajar Hasria Hasria, Hasria Hatta, M Ilham Ika Lestari Salim Jasril Jasril Kamaruddin, Anggi Ashari Khair, Nada Tsawaabul Kurniawan, Saifur Yusuf La Aba Lubis, Anggun Tri Utami BR. Ma'rifah, Laila Alfi Mariany Mariany Maryani Maryani Matondang, Irfan Jamal Mhd. Kadarman Muhammad Fikry Muhammad Irsyad Naim, Rosani Nasus, Evodius Nazir, Alwis Nazruddin Safaat Nazruddin Safaat H Ode Abdul Fajar Hasidu, La Ode Muhammad Sety, La Pasiolo, Lugas Pratama, Dandi Irwayunda Putri, Atika Putri, Widya Maulida Rahmad Abdillah Ramadhani, Astrid Rasmiati Rasyid Rosmiati Rosmiati Safar, Muhammad Saleh, Ramlah Saputri, Ekawati Saputri, Ekawati Saputri, Sety, La Ode Muhamad Siti Sri Rahayu Suharsono Bantun Surya Agustian Susanti, Risqi Wahyu Suwanto Sanjaya Syahrianti Syahrianti Teluk, Grace Tedy Tukatman Tukatman Tulak, Grace Tedy Vitriani, Yelfi Yuhanah Yuhanah Yulianti, Eva Tri Yuniarti Eka Saputri Yuniarti Eka Saputri B Yusra, Yusra Zabihullah, Fayat Zulastri, Zulastri