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All Journal International Journal of Electrical and Computer Engineering Semantik Techno.Com: Jurnal Teknologi Informasi Inklusi Journal of Disability Studies Jurnal Analisis Sosial Politik Al-Hikmah: Jurnal Agama dan Ilmu Pengetahuan Jurnal Teknik Informatika (JUTIF) Nusantara: Jurnal Pendidikan Indonesia Arus Jurnal Sosial dan Humaniora Indonesian Journal of EFL and Linguistics Jurnal Sosial dan Humanis Sains QISTINA: Jurnal Multidisiplin Indonesia Journal of Government and Social Issues (JGSI) Journal of Creativity Student
Budi Harjo
Universitas Dian Nuswantoro
Religion Humanities Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Nursing Social Sciences Other

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Securing Medical Images Using Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD) for Image Steganography Pramudya, Elkaf Rahmawan; Handoko, L. Budi; Harjo, Budi; Sani, Ramadhan Rakhmat; Sari, Christy Atika; Shidik, Guruh Fajar; Andono, Pulung Nurtantio; Sarker, Md. Kamruzzaman
Jurnal Teknik Informatika (Jutif) Vol. 6 No. 2 (2025): JUTIF Volume 6, Number 2, April 2025
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2025.6.2.4426

Abstract

Steganography is a technique for embedding secret information into digital media, such as medical images, without significantly affecting their visual quality. The primary challenge in medical image steganography is preserving the quality of the cover image while ensuring robustness against distortions such as compression or data manipulation attacks, which may impact diagnostic accuracy. This study proposes an enhanced steganographic method based on Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD) to improve the security and robustness of medical image embedding. DWT decomposes the medical image into four frequency sub-bands (LL, LH, HL, HH), while SVD is applied to embed the secret image while maintaining essential medical features. Experimental results show that the proposed method achieves a PSNR value of up to 78 dB and an SSIM value approaching 1, indicating that the stego image quality is nearly identical to the original cover image. Compared to previous DCT-SVD and IWT-SVD-based approaches, the DWT-SVD method offers superior robustness and imperceptibility, particularly in preserving image quality in complex-textured medical images. This method contributes to enhancing data security in telemedicine and AI-based medical imaging applications by ensuring that sensitive medical data remains protected while preserving image integrity for diagnostic use.
Pengembangan Instrumen Keterampilan Berpikir Kritis pada Pembelajaran Matematika SMA Harjo, Budi; Putra, Sudarmadi; Jaladri, Kafin; Subando, Joko
Nusantara: Jurnal Pendidikan Indonesia Vol. 5 No. 1 (2025)
Publisher : Lembaga Sosial Rumah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62491/njpi.2025.v5i1-12

Abstract

Purpose – This study aims to develop an instrument for assessing critical thinking skills that meets the criteria for validity, reliability, and good item quality.Method – Preliminary research identified challenges faced by mathematics teachers in designing valid and reliable assessment instruments for students' critical thinking skills. To address this, the study employed a literature review, expert validation, and both limited and expanded trials. Content validity was assessed using Aiken’s validity index, while construct validity and reliability were analyzed using Confirmatory Factor Analysis (CFA). Findings – The first-stage trial focused on assessing content validity through Aiken’s validity index. The results indicated that both the construction material and linguistic/readability aspects achieved validity values above 0.5, confirming the instrument’s suitability for high school mathematics learning. The subsequent expanded trial evaluated construct validity and reliability using CFA. The analysis demonstrated that all indicator factor loadings exceeded 0.5, confirming their validity, while construct reliability values exceeded 0.7, indicating reliability. Additionally, the model fit indices showed RMSEA < 0.08, p-value > 0.05, Chi-Square/df < 2, AGFI > 0.9, and GFI > 0.9, confirming that the developed model aligned well with the empirical data. Research Implications – The developed instrument effectively measures critical thinking skills in mathematics learning, meeting the criteria for a robust assessment tool with strong validity, reliability, and model fit. It is recommended for broader implementation in educational settings.
Integritas Kepemimpinan Kepala Desa Dalam Pengelolaan Dana Desa Di Desa Tri Sinar Kecamatan Marga Tiga Kabupaten Lampung Timur Purba, Darmawan; Krisbintoro, R. Sigit; Harjo, Budi
Journal of Government and Social Issues (JGSI) Vol 4 No 1 (2024): December
Publisher : Government Science Department , Faculty of Social and Political Science - University of Lampung. Journal of Government and Social Issues (JGSI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jgsi.v4i1.49

Abstract

Pengelolaan dana desa di Provinsi Lampung, berdasarkan informasi dari situs Sistem Informasi Penelusuran Perkara (SIPP) PN Tanjungkarang menunjukkan terjadinya peningkatan penyalahgunaan dana desa tiga tahun terakhir dengan nilai kerugian sebanyak 6.929 miliar. Terdapat ancaman serius terkait pengelolaan dana desa, perlu koreksi bear dalam penerapan UU Desa No.6 Tahun 2014, khususnya terkait integritas dan kepemimpinan pemerintahan desa dalam pengelolaan dana desa. Di tengah maraknya praktik penyalahgunaan dalam pengelolaan dana desa, yang diindikasikan pada rendahnya trust terhadap kepala desa / perangkat desa. Hal menarik terjadi Di Desa Tri Sinar Kecamatan Marga Tiga terdapat sosok kepala desa yang sudah menjabat selama 14 tahun atau sudah tiga periode berturut-turut. Panaorama ini menjelaskan bahwa masih terdapat model leadership yang mendapat dukungan jangka panjang dari masyarakat. Penelitian menggunakan metode deskriptif untuk mengetahui dan mendeskripsikan bagaimana integritas kepemimpinan kepala desa dalam pengelolaan dana desa di di Desa Tri Sinar Kecamatan Marga Tiga Kabupaten Lampung Timur. Hasil penelitian menunjukkan bahwa kepala desa Tri Sinar memiliki nilai integritas jujur, Bertanggung jawab dan Disiplin. Begitu juga dengan etos kerja integritas, kepala desa memiliki etos kerja integritas yang baik, mandiri, kerja keras dan sederhana; sedangkan pada nilai sikap integritas menunjukkan bahwa kepala desa telah memiliki nilai sikap integritas yang baik, berani, peduli dan adil dalam pengelolaan pembangunan di desa. Kedepan inregritas kepala desa harus ditingkatkan terus menerusdengan melakukan pembinaan, pengawasan dan fasilitasi dari pemerintah daerah dalam meningkatkan nilai integritas inti; dan pelatihan kepemimpinan kepala desa dalam menanamkan dan mengembangkan nilai sikap integritas.
Deteksi Sarkasme Pada Dataset News Headlines Menggunakan Artificial Neural Network Berbasis TF-IDF Prasetyo, Andhi; Harjo, Budi
Journal of Creativity Student Vol. 8 No. 2 (2025)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jcs.v8i2.39855

Abstract

Sarcasm is a style of language frequently used in news headlines, especially in satirical media, thus posing a challenge for natural language processing systems in understanding the true meaning. The system's inability to recognize sarcasm can lead to misinterpretation in various tasks such as sentiment analysis and text classification. This study aims to detect sarcasm in news headlines using an Artificial Neural Network (ANN) with Term Frequency–Inverse Document Frequency (TF-IDF) feature representation. The dataset used is the News Headlines Dataset for Sarcasm Detection, which consists of approximately 28,000 news headlines from two sources, namely The Onion as sarcastic news and HuffPost as non-sarcastic news. The data is processed through a text pre-processing stage, then represented using TF-IDF with unigram and bigram schemes. The ANN model is trained using an 80:20 data split scheme and evaluated using accuracy, precision, recall, and F1-score metrics. Experimental results show that the TF-IDF-based ANN model achieved an accuracy of 85.02% and an F1-score of 84.44% on the test data. These results demonstrate that the ANN approach with TF-IDF representation remains effective and efficient as a baseline method for detecting sarcasm in short texts such as news headlines.
Implementasi Nilai-Nilai Kebangsaan pada Masyarakat Perkotaan (Studi pada Masyarakat Kota Bandar Lampung) Harjo, Budi; Kurniawan, Robi Cahyadi
Arus Jurnal Sosial dan Humaniora Vol 5 No 3: Desember (2025)
Publisher : Arden Jaya Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57250/ajsh.v5i3.1736

Abstract

Tidak dapat dipungkiri bahwa kemerdekaan Indonesia tahun 1945 disebabkan oleh tumbuhnya rasa persatuan dan kesatuan bangsa Indonesia. Dengan persatuan dan kesatuan inilah kita dapat mengusir penjajah, bahkan dengan persatuan dan kesatuan ini jualah sejatinya kita dapat membangun bangsa mewujudkan masyarakat yang adil makmur dan sejahtera. Untuk mewujudkan rasa persatuan dan kesatuan bangsa ini, perlu di topang oleh nilai-nilai kebangsaan, yaitu nilai religiusitas, kemanusiaan, keadilan, keseimbangan dan nilai demokrasi. Tentu bukan persoalan yang mudah untuk bisa mempertahankan nilai-nilai ini. Namun demikian untuk mewujudkan persatuan dan kesatuan bangsa ini kita di hadapkan dengan tantangan yang datang dari luar dengan maksud merusak nilai-nilai kebangsaan kita. Oleh karena itu, maka perlu di lakukan pemotretan terhadap implementasi nilai-nilai kebnagsaan kita untuk mengetahui dan menjadi landasan pijak dalam membuat kebijakan dan program untuk memperkuat nilai-nilai kebangsaan ini.
Identifikasi Permasalahan Pembelajaran Mahasiswa Tunanetra Pada Mata Kuliah Sintaksis Bahasa Inggris: Studi Kasus di Universitas Dian Nuswantoro Sunardi, Sunardi; Nugroho, Raden Arief; Harjo, Budi
INKLUSI Vol. 1 No. 2 (2014)
Publisher : PLD UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.191 KB) | DOI: 10.14421/ijds.010209

Abstract

This study focuses on identifying the problems faced by visually impaired students in teaching-learning  process of English syntax course at Faculty of Humanities, Dian Nuswantoro University in 2014. English syntax, as one of the subjects studied in the English study program, is considered as a challenging subject for visually impaired students as it involves visual perception, such as graphics and images. This research was a descriptive qualitative one. The researchers collected the data by using an in-depth interview. This involved 2 visually impaired students who experienced the learning process of English syntax and 3 lecturers of Dian Nuswantoro University. The discussion was limited on the issues around the needs for creating an accessible learning media and kinds of difficulties faced by the visually impaired students. From the in-depth interview, there are three major findings that are highlighted: a) the needs to overcome all inaccessible English syntax learning materials; b) general difficulties faced by visually impaired students in English syntax subject; c) technical difficulties in drawing tree structure diagrams. Then, these highlighted problems and findings are used as to formulate the recommendations of this study.
Co-Authors Agus Sri Giyanti Aman Toto Dwijono Anisa Larassati Ari Darmastuti Arizka Warganegara Christy Atika Sari Darmawan Purba Elkaf Rahmawan Pramudya Fahmi Amiq Fajar, Gilang Aditia Feni Rosalia, Feni Guruh Fajar Shidik Juantara, Bendi Kafin Jaladri Krisbintoro, R Sigit L. Budi Handoko Muljono Muljono Muljono, - Nina Setyaningsih Nisa, Qoirul Prasetyo, Andhi Pulung Nurtantio Andono Putra, Sudarmadi R. Sigit Krisbintoro Rachmad Abdullah Raden Arief Nugroho Ramadhan Rakhmat Sani Robert David Effendi Robi Cahyadi Kurniawan Sarker, Md. Kamruzzaman Subando, Joko - Sunardi Sunardi Sunardi Sunardi Sunardi Valentina Widya Suryaningtyas, Valentina Widya