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All Journal Jurnal Informatika dan Teknik Elektro Terapan CESS (Journal of Computer Engineering, System and Science) Informatics for Educators and Professional : Journal of Informatics Network Engineering Research Operation [NERO] KOPERTIP: Jurnal Ilmiah Manajemen Informatika dan Komputer METHODIKA: Jurnal Teknik Informatika dan Sistem Informasi Indonesian Journal of Applied Informatics Antivirus : Jurnal Ilmiah Teknik Informatika Jurnal ICT : Information Communication & Technology Jurnal Sistem Informasi Kaputama (JSIK) JISKa (Jurnal Informatika Sunan Kalijaga) Jurnal Informatika dan Rekayasa Perangkat Lunak JSR : Jaringan Sistem Informasi Robotik JURSIMA (Jurnal Sistem Informasi dan Manajemen) JATI (Jurnal Mahasiswa Teknik Informatika) JIKA (Jurnal Informatika) MEANS (Media Informasi Analisa dan Sistem) Jurnal Teknik Informatika (JUTIF) Jurnal Mahasiswa Sistem Informasi (JMSI) International Journal of Social Science Jurnal Riset dan Aplikasi Mahasiswa Informatika (JRAMI) Jurnal Janitra Informatika dan Sistem Informasi Prosiding Seminar Nasional Sisfotek (Sistem Informasi dan Teknologi Informasi) INFORMATIKA Journal of Artificial Intelligence and Engineering Applications (JAIEA) Jurnal Mahasiswa Ilmu Komputer TAMIKA: Jurnal Tugas Akhir Manajemen Informatika & Komputerisasi Akuntansi Wawasan : Jurnal Ilmu Manajemen, Ekonomi dan Kewirausahaan Manajemen Kreatif Jurnal JURSIMA Jurnal Ekonomi Manajemen Akuntansi BULLET : Jurnal Multidisiplin Ilmu AMMA : Jurnal Pengabdian Masyarakat NERO (Networking Engineering Research Operation) Jurnal Informatika: Jurnal Pengembangan IT Jurnal Sistem Informasi dan Manajemen INTERNAL (Information System Journal) Intechno Journal : Information Technology Journal
Yudhistira Arie Wijaya
STMIK IKMI Cirebon
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ANALISA PERBANDINGAN PERFORMA OPTIMIZER ADAM, SGD, DAN RMSPROP PADA MODEL H5 Anggara, Doni; Suarna, Nana; Arie Wijaya, Yudhistira
NERO (Networking Engineering Research Operation) Vol 8, No 1 (2023): Nero - 2023
Publisher : Jurusan Teknik Informatika Fakultas Teknik Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/nero.v8i1.19226

Abstract

Melakukan komunikasi tidak sebatas berbentuk verbal saja, bisa juga berkomunikasi nonverbal yaitu dengan menyampaikan informasi dari ekspresi wajah. Namun, permasalahan dalam analisa ekspresi wajah jika melakukan pendeteksian ekspresi wajah secara manual maka akan membutuhkan waktu yang cukup lama dan tidak selalu akurat, sedangkan jika melakukan pendeteksian menggunakan machine learning berbasis Python maka akan mempersingkat proses pendeteksian ekspresi wajah, oleh karena itu diperlukan suatu model yang memiliki tingkat accuracy yang mumpuni sehingga dapat mendeteksi dan mengklasifikasikan ekspresi wajah dengan cepat dan akurat. Tujuan utama dari penelitian ini yaitu untuk mengetahui optimizer mana yang terbaik diantara Adam, SGD, dan RMSprop untuk model klasifikasi dengan membandingkan performa hasil training dari setiap optimizer dimana hasil dari proses training menghasilkan file model dengan ekstensi h5. Model dengan metrik accuracy, validation accuracy, loss, waktu tempuh, dan size model terbaik di antara optimizer tersebut akan di nyatakan sebagai optimizer terbaik. Data yang digunakan berupa foto sebanyak 71.774 foto dengan 7 label ekspresi wajah yang diantaranya senang, sedih, terkejut, marah, takut, jijik, dan netral. Metode yang digunakan untuk mengukur performa model pada dataset yang diberikan yaitu evaluate() dari library Keras, classification_report dan precision_recall_fscore_support yang terdapat pada library sklearn.metrics. Dengan skenario pengujian 60 epochs dan learning rate sebesar 0.001, Optimizer Adam memiliki nilai accuracy lebih tinggi yaitu 68.61% disusul oleh SGD dengan nilai accuracy sebesar 57.68% dan accuracy RMSprop sebesar 54.83%.Kata kunci: Adam, Deep learning, Ekspresi Wajah, Klasifikasi, Optimizer, RMSprop, SGD.
PERBANDINGAN KINERJA SVM DAN NAÏVE BAYES PADA ANALISIS SENTIMEN KOMENTAR DEMONSTRASI DPR 25 AGUSTUS 2025 Nashir, Mukhtar; Dian Ade Kurnia; Yudhistira Arie Wijaya; Ade Irma Purnama Sari; Nisa Dienwati Nuris
Jurnal Mahasiswa Sistem Informasi (JMSI) Vol. 7 No. 1 (2025): Jurnal Mahasiswa Sistem Informasi (JMSI)
Publisher : Program Studi DIII Sistem Informasi - Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jmsi.v7i1.10650

Abstract

Penelitian ini membandingkan kinerja Support Vector Machine dan Naive Bayes untuk analisis sentimen komentar demonstrasi DPR pada 25 agustus 2025, mengidentifikasi faktor yang memengaruhi prediksi, serta memahami peran preprocessing dan fitur TF-IDF dalam menghasilkan klasifikasi yang stabil. Penelitian ini menggunakan komentar dari youtube berjumlah 17.335 komentar yang diproses melalui tahapan eksplorasi data, pembersihan teks, pelabelan berbasis lexicon berbasis bootstrapping, dan ekstraksi fitur utama (TF-IDF unigram/biagram). Hasil penelitian menunjukkan bahwa Support Vector Machine memberikan akurasi lebih tinggi yaitu 98% dibandingkan Naive Bayes memberikan 88% karena cenderung bias pada kelas mayoritas . Perbedaan performa dipengaruhi oleh struktur data, distribusi kata, serta sensitivitas model terhadap fitur yang tidak merata. SVM mampu memaksimalkan pemisahan antar kelas sehingga lebih stabil pada ruang fitur berdimensi tinggi, sedangkan Naive Bayes menghadapi kesulitan dalam mengenali pola sentimen ketika kelasTidakSeimbang mendominasi. Penelitian ini menegaskan bahwa preprocessing dan representasi fitur TF-IDF berperan besar dalam mengurangi noise serta meningkatkan kualitas pembelajaran model. Penelitian ini menyimpulkan bahwa SVM lebih sesuai digunakan untuk analisis sentimen komentar politik di Indonesia. Temuan ini memberi dasar empiris bagi pengembangan metode analisis sentimen pada isu sosial yang memiliki dinamika bahasa dan variasi konteks yang tinggi.
Augmentasi dan Fine-Tuning pada Deteksi Wajah Deepfake Cintia Putri Prasetia; Hajijin Amri; Yudhistira Arie Wijaya
Prosiding SISFOTEK Vol 9 No 1 (2025): SISFOTEK IX 2025
Publisher : Ikatan Ahli Informatika Indonesia

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Abstract

The rapid advancement of artificial intelligence, particularly in computer vision, has led to the proliferation of deepfake technology, which enables the creation of highly realistic synthetic facial images. This study proposes a deep learning-based approach for detecting real and fake faces using convolutional neural networks (CNN), specifically ResNet18, ResNet34, and ResNet50 architectures. The dataset used includes a public dataset from Kaggle (140K Real and Fake Faces) and a locally collected dataset to evaluate model generalization. Data preprocessing such as resizing, normalization, and augmentation were applied to improve robustness. Training employed transfer learning with fine-tuning over multiple epochs. Evaluation metrics included accuracy, precision, recall, F1-score, confusion matrix, and inference time. The results showed that ResNet50 achieved the highest validation accuracy of 94.1%, outperforming the other architectures. The integration of local datasets and data augmentation significantly improved classification performance. This model demonstrates strong potential for real-world deployment in digital security systems requiring deepfake detection.
Klasifikasi Wajah Mahasiswa Menggunakan Vertex AI AutoML untuk Sistem Absensi Berbasis TFLite Hajijin Amri; Cintia Putri Prasetia; Yudhistira Arie Wijaya
Prosiding SISFOTEK Vol 9 No 1 (2025): SISFOTEK IX 2025
Publisher : Ikatan Ahli Informatika Indonesia

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Abstract

This research focuses on the development of a student facial classification model for attendance verification using Google Vertex AI AutoML. A total of 401 facial images representing 20 student classes were utilized, undergoing preprocessing steps including resizing to 224×224 RGB resolution and conversion to 8-bit format. Data augmentation techniques such as horizontal flipping, ±15° rotation, and brightness modulation were applied to enhance dataset variability. After refinement, 367 images were retained and divided into training (80%), validation (10%), and testing (10%) sets. The model was trained using the Edge TPU – Best Prediction mode in Vertex AI AutoML, resulting in an excellent performance with an average precision of 0.999, precision of 100%, and recall of 89.2%. The confusion matrix indicated that most classes were accurately identified with minimal recall errors. The finalized model was converted to TensorFlow Lite (TFLite) format and tested on edge devices, demonstrating efficient inference and accurate recognition. The findings affirm the effectiveness of integrating AutoML and TFLite to implement lightweight, resource-efficient face recognition systems suitable for student attendance applications on constrained hardware platforms.
Peningkatan Signifikan Kualitas Klaster K-Means Berbasis DBI: Integrasi UMAP-K-Means Restu Normalasari; Siti Sopiyah; Yudhistira Arie Wijaya
Prosiding SISFOTEK Vol 9 No 1 (2025): SISFOTEK IX 2025
Publisher : Ikatan Ahli Informatika Indonesia

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Abstract

This research focuses on improving the quality of high-dimensional data clustering results through the integration of Uniform Manifold Approximation and Projection (UMAP) and the K-Means algorithm. The main objective is to evaluate how UMAP, when used as a preprocessing stage, enhances cluster compactness and separation produced by K-Means. The experiment compares two approaches—standard K-Means and the UMAP + K-Means combination—using the Davies–Bouldin Index (DBI) as the primary evaluation metric. Empirical findings indicate that UMAP integration significantly reduces the DBI value from 0.704 to 0.094, representing an 86.6% improvement in clustering quality. Furthermore, visual analysis shows that UMAP enables K-Means to form more compact and clearly separated clusters. These results confirm that manifold-based embeddings like UMAP effectively overcome K-Means limitations in handling nonlinear, high-dimensional data. This study contributes to the development of more accurate and efficient clustering approaches applicable to various domains, including bioinformatics, medical imaging, and socio-economic data analysis.
Arsitektur Ensemble Convolutional Neural Network untuk Klasifikasi Multi Kelas Penyakit Daun Kopi Ade Irma Purnamasari; Dadang Sudrajat; Yudhistira Arie Wijaya
Prosiding SISFOTEK Vol 9 No 1 (2025): SISFOTEK IX 2025
Publisher : Ikatan Ahli Informatika Indonesia

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Abstract

Coffee leaf disease remains one of the most significant threats to global coffee production, particularly Coffee Leaf Rust (CLR) caused by Hemileia vastatrix. Early and accurate disease detection is essential for maintaining yield stability and ensuring sustainable coffee farming. This study proposes an Ensemble Convolutional Neural Network (CNN) architecture that combines MobileNetV2 and ResNet50 to enhance robustness and generalization in multi-class classification of coffee leaf diseases. The dataset consists of 1,664 images categorized into four classes: miner, nodisease, phoma, and rust, collected from both public repositories and real-field observations. Image preprocessing includes resizing, normalization, and augmentation to increase diversity and reduce overfitting. The ensemble model is trained using the Adam optimizer with a learning rate of 0.0001 and evaluated through accuracy, precision, recall, and F1-score metrics. Results demonstrate that the ensemble CNN outperforms single CNN architectures, achieving an accuracy of 95.6%, precision of 94.4%, and F1-score of 94.2%, even under challenging illumination and noise conditions. Compared to individual models, performance improvement ranges from 2%–4%. The model also maintains higher stability when tested under low-light and noisy images, confirming its robustness in real-world scenarios. This study concludes that ensemble CNN offers a reliable and efficient framework for real-time coffee leaf disease detection and can serve as a foundation for developing intelligent agricultural systems using edge computing.
KLASIFIKASI PENYAKIT DAUN PADI MENGGUNAKAN TRANSFER LEARNING DENGAN ANALISIS PENGARUH VARIASI DIMENSI CITRA PADA KINERJA MODEL Akhmad Taukhid; Martanto; Yudhistira Arie Wijaya; Heliyanti Susana; Nana Suarna
METHODIKA: Jurnal Teknik Informatika dan Sistem Informasi Vol. 12 No. 1 (2026): Volume 12 Nomor 1 Tahun 2026
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/mtk.v12i1.4940

Abstract

Penelitian ini berfokus pada deteksi dini penyakit daun padi untuk meningkatkan produktivitas pertanian dan mengurangi kesalahan diagnosis yang sering terjadi pada identifikasi manual. Meskipun berbagai penelitian telah menerapkan deep learning untuk klasifikasi penyakit tanaman, pengaruh resolusi citra terhadap kinerja model klasifikasi penyakit daun padi, khususnya pada skenario data terbatas, masih jarang dikaji secara sistematis. Penelitian ini bertujuan menganalisis kinerja model klasifikasi penyakit daun padi berbasis transfer learning dengan arsitektur VGG16 pada citra beresolusi 224×224 piksel, sekaligus menilai efisiensi proses komputasi pelatihan dan pengujian yang dilakukan. Data yang digunakan berupa 320 citra daun padi dari dataset publik “Daun Padi Sultra (Sulawesi Tenggara)” di Kaggle yang komprehensif menjadi data latih, validasi, dan uji dengan perbandingan 60:20:20. Tahapan penelitian utama meliputi eksplorasi karakteristik dan distribusi data, pra-pemrosesan citra (pengubahan ukuran ke 224×224, normalisasi, dan augmentasi terbatas), serta pembangunan model transfer learning dengan VGG16 sebagai ekstraktor fitur yang membekukan dan kepala klasifikasi kustom. Model dibor menggunakan optimizer Adam dengan mekanisme EarlyStopping dan ModelCheckpoint, kemudian dievaluasi menggunakan akurasi, presisi, recall, F1-score, dan konfusi matriks. Hasil pengujian menunjukkan bahwa model mencapai akurasi uji sebesar 98,44% dengan loss 0,1815, serta nilai rata-rata makro dan rata-rata tertimbang untuk presisi, recall, dan F1-score yang mendekati 0,98 dengan hanya satu kesalahan klasifikasi pada data uji. Proses pelatihan dan penyelesaian dapat diselesaikan dengan beban komputasi yang masih moderat pada lingkungan GPU Google Colab, sehingga konfigurasi VGG16 dengan resolusi 224×224 piksel berpotensi menjadi baseline yang efektif dan efisien untuk klasifikasi penyakit daun padi pada skenario data terbatas.
Algoritma LightGBM dengan SMOTE & ADASYN untuk Prediksi Risiko Serangan Jantung Sugianto, Nanda Putri; Purnamasari, Ade Irma; Pratama, Denni; Marta, Puji Pramudya; Wijaya, Yudhistira Arie
JSR : Jaringan Sistem Informasi Robotik Vol 10, No 1 (2026): JSR : Jaringan Sistem Informasi Robotik
Publisher : AMIK Mitra Gama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58486/jsr.v10i1.633

Abstract

Ketidakseimbangan data merupakan tantangan utama dalam pemodelan prediksi medis, termasuk prediksi serangan jantung, karena jumlah kasus positif jauh lebih sedikit dibandingkan kasus negatif sehingga menurunkan kemampuan model dalam mendeteksi pasien berisiko tinggi. Penelitian ini bertujuan untuk membandingkan efektivitas dua teknik oversampling, yaitu Synthetic Minority Oversampling Technique (SMOTE) dan Adaptive Synthetic Sampling (ADASYN), dalam meningkatkan performa algoritma Light Gradient Boosting Machine (LightGBM) untuk prediksi risiko serangan jantung. Dataset berjumlah 1.319 sampel dengan sembilan fitur klinis dan dianalisis melalui tahapan pra-pemrosesan, normalisasi, penanganan class imbalance, pembangunan model, serta evaluasi menggunakan Accuracy, Precision, Recall, F1-Score, dan AUC-ROC. Hasil menunjukkan bahwa model baseline memiliki akurasi tinggi namun sensitivitas terhadap kelas positif masih rendah. Setelah diterapkan oversampling, model mengalami peningkatan signifikan. LightGBM-SMOTE memperoleh F1-Score terbesar (0.9876) dan AUC-ROC 0.9853, sedangkan LightGBM-ADASYN mencapai F1-Score 0.9855 dan AUC-ROC 0.9861. Temuan ini menunjukkan bahwa SMOTE memberikan peningkatan performa yang lebih stabil dalam mendeteksi kelas minoritas. Dengan demikian, teknik oversampling khususnya SMOTE terbukti efektif untuk meningkatkan akurasi dan sensitivitas model prediksi serangan jantung.
Peningkatan Kompetensi Siswa SMK Melalui Pelatihan Junior Web Developer Dalam Pengembangan Website Ade Irma Purnamasari; Yudhistira Arie Wijaya; Aditiya Arif Firmansyah; Intan Wangi Nur Qibti
AMMA : Jurnal Pengabdian Masyarakat Vol. 3 No. 2 : Maret (2024): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

This community service program aims to enhance the competencies of vocational high school (SMK) students in web development through a Junior Web Developer training program. The activities were carried out at several SMKs in Cirebon Regency and Cirebon City as an effort to bridge the gap between school curricula and industry needs. The implementation methods included preparation and planning, training execution, monitoring and evaluation, as well as dissemination of results. The outcomes of this program showed a significant improvement in students' understanding and skills in web development technologies, particularly in the use of HTML, CSS, JavaScript, and modern frameworks. In addition, participating teachers also benefited from workshops designed to enhance their ability to teach industry-based materials. This program successfully produced several outputs such as learning modules, student web projects, and collaborations with industry partners to open up job opportunities for graduates. With this program, it is expected that vocational students will have better competencies to face the workforce and the digital industry. The sustainability of this program can be expanded by increasing industrial partnerships and broadening the scope of training participants.
Peningkatan Kompetensi Digital Lulusan SMK Kabupaten Cirebon Melalui Pelatihan Junior Network Administrator Yudhistira Arie Wijaya; Edi Tohidi; Alwan Azhar; Andi Ardiansyah
AMMA : Jurnal Pengabdian Masyarakat Vol. 3 No. 4 : Mei (2024): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

Junior Network Administrator training for SMK graduates in Cirebon Regency aims to improve skills and competencies in the field of computer networks. The program is designed as a solution to employment challenges by providing competency-based training that refers to industry standards. Training methods include theory, hands-on practice, and case studies relevant to the needs of the world of work. The program evaluation showed an increase in participants' understanding and skills in managing computer networks, configuring network devices, and basic troubleshooting. In addition, participants obtained certifications that can increase their competitiveness in the job market. The training results showed that most of the participants were successful in obtaining jobs or internships in technology companies and related institutions. The success of this program is supported by cooperation between educational institutions, local governments, and the industrial sector. Challenges faced include limited facilities and participants' readiness to deal with rapid technological developments. To improve the effectiveness of the program, it is recommended to improve training facilities, update the curriculum in line with industry developments, and collaborate more closely with the private sector.
Co-Authors Abubakar Sidik Ade Irma Purnama Sari Ade Irma Purnamasari Ade Irma Purnamasari Adi Hermawan Aditiya Arif Firmansyah Adiyanto, Alfian Adjie Setyadj, Mochammad Agesty Kusmiyaty Agni, Vega Putra Dwi Ahmad Faqih Ahmad Jamalul Noor Ahmad Rifai Ikhsanudin AKBAR, MUHAMAD DENI Akhmad Taukhid Alfirda Sofyan, Zahra Aliya Anisa Rahma Alwan Azhar Alya Fadia An-naziz Safaat, Wafik Andi Ardiansyah Andriyani, Wini Anggara, Doni Anjar Permadi Aprianto, Wili Arya Hadi Wicaksana ASEP SAEFUDDIN Asmana, Asmana Astri Amelia Athaullah Abrar Bayan Ayura Yufita Beby Maryam Cintia Putri Prasetia Dadang Sudrajat Danar Dana, Raditya Darma Irawan, Bobi Darussalam, Luthvi Nurfauzi Denni Pratama Denni Pratama Denni Pratama Dermawan, Hibrizi Dzaky Dian Ade Kurnia Dian Ade Kurnia Dodi Solihudin Edi Tohidi Edi Wahyudin Falih, Alfi Rizqi Falih FANDI ACHMAD Fauzan, Muhamad Nur Fianita Rusadi Fianita Rusadi Firmansyach, Wildan Attariq Hajijin Amri Hamonangan, Ryan Hayati, Umi Hegarmanah Muhabatin Heliyanti Susana Heliyanti Susana Herman Hermawan, Adi Hidayat, Zaids Syarif Ibnu Ubaedila Ikhwan Fahruddin, Yusuf Inawati, Windi Intan Wangi Nur Qibti Irfan Ali Irfan Ali Irma Agustina Jaelani Sidik Jayawarsa, A.A. Ketut Jurnal Konsera Khaerul Anam Khoeri, Yajid Komala, Wulan Kurniawan , Rudi Laela Laela Leli Oktaviani Lukmanul Hakim Manzis, Zian Marta, Puji Pramudya Martanto Martanto . Martanto Martanto Masjunedi, Masjunedi Maulana, Tedy Mifta Almaripat Mita Amelia Moh Nurdayat Dayat MUHAMAD DENI AKBAR Muhamad Fahrurozi Muhamad Nur Fauzan Muhammad Aditya Rabbani Adit Mulyawan Nabila, Aynun Nana Suarna Nana Suarna Narasati, Riri Narasati Nashir, Mukhtar Nining Rahaningsih Nisa Dieanwati Nuris Nisa Dienwati Nuris Nur Amalia, Yustika Nurazijah, Wulan Nurdiawa, Odi Nurholipah, Titin Nurrahman, Rizki Odi Nurdiawa Odi Nurdiawan Pebriyanto, Ramdhan Pratama, Denni Puji Pramudya Marta Puji Pramudya Marta Purnamasari, Ade Irma Restu Normalasari Rini Astuti Rini Astuti Rini Astuti Rio Febriyan Rizal Rizal Roni Saputra Rubangiya Rubangiya Rudi Kurniawan Rudi Kurniawan Rudi Kurniawan Rudi Kurniawan Saeful Anwar Saeful Anwar, Saeful Satria Turangga Septian Nugraha, Titan Septiani Gumilar, Tia Shifa Dwi Oktaviani Siti Sopiyah Suarna, Nana Sugianto, Nanda Putri Sulaeman, Muhammad Suteja Syach Putra, Yanuar Tati Suprapti Taufik Hidayat Tegar Lazuardi, Muhammad Thomas Agam Tiana Dewi Tri Anelia Trian Nurmansyah Triswanto, Triswanto Tuti Hartati Tuti Hartati Tuti Hartati Umi Hayati Wahyudi Wahyudi Wartumi Wartumi Willy Prihartono Winayah, Winayah Windy Astuti Witriyani Witriyani Yudis Firmansyah yulani, Yulani - Yulia, Yuli