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All Journal Jurnal Pseudocode Jurnal Pengembangan Rekayasa dan Teknologi Joined Journal (Journal of Informatics Education Jurnal Inovasi Pendidikan dan Sains Journal of Computer Networks, Architecture and High Performance Computing Jurnal Anugerah: Jurnal Pengabdian Kepada Masyarakat Bidang Keguruan dan Ilmu Pendidikan Abdi Masya Jurnal Abdimas Bina Bangsa Jurnal Sistem Informasi, Teknik Informatika dan Teknologi Pendidikan (JUSTIKPEN) Jurnal Sosial dan Abdimas Journal of Systems, Information Technology, and Electronics Engineering Tematik International Journal of Electrical and Intelligent Engineering
Dewi Purnamasari
Universitas Ivet
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Implementasi Algoritma Kriptografi Caesar Cipher dan Rail Fence Cipher untuk Keamanan Data Teks Menggunakan Python Dewi Purnamasari
Joined Journal (Journal of Informatics Education) Vol 4 No 1 (2021): Volume 4 Nomor 1 (2021)
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joined.v4i1.1697

Abstract

Security and confidentiality in communicating become a necessity so that the information sent and received is not misused by irresponsible parties. Cryptography not only provides a tool for information security but is also a useful technique for the security and confidentiality of information. This study aims to implement the Caesar Cipher and Rail Fence Cipher algorithms to determine the encoding process and also to determine the effectiveness of the encryption time and description of the two cryptographic techniques. The processing time of the two methods shows that the description time is longer than the encryption process. The average execution time of the Caesar Cipher algorithm is faster than the Rail Fence Cipher. The average encryption time is 0.0000802 second and the description time is 0.000131 second, however Rail Fence is more secure because the text process is sent in a zig zag form, so the received ciphertext is more secure than Caesar Cipher. Caesar Cipher is faster because the letter encoding process is shifted as many keys as desired. Keywords: Caesar Cipher, Rail Fence Cipher, Key, ziq zaq, Plaintext, Chipertext
ENKRIPSI CITRA FOVEA AVASCULAR ZONE (FAZ) MENGGUNAKAN KRIPTOGRAFI VIGENERE CIPHER Dewi Purnamasari; Nindita Erwanti
Jurnal Pseudocode Vol 9 No 2 (2022): Volume 9 Nomor 2 September 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pseudocode.9.2.114-121

Abstract

Kemajuan teknologi yang berkembang pesat sekali sangat memepengaruhi atas keamanan data baik data teks maupun data citra digital. Pencurian data dari tahun ke tahun mengalami peningkatan. Salah satu area yang memerlukan keamanan data yaitu keamanan data medis pasien. Keamanan data citra medis sangat perlu dilakukan untuk melindungi keamanan data medis dari pencurian data oleh pihak ketiga supaya tidak bisa mengakses data tersebut. Perkembangan Diabetic Retinopathy (DR) setiap tahunnya juga meningkat. Menentukan tingkat keparahan DR dilakukan dengan mendeteksi Fovea Avascular Zone (FAZ). Pada penelitian ini mengenkripsi plainimage FAZ menjadi cipherimage menggunakan metode Vigenere Cipher. Waktu enkripsi rata rata dari citra FAZ yang diujikan adalah 4.96 detik.Pada pengujian didapatkan semakain luas area FAZ maka waktu enkripsi nya juga semakin lama.
Peningkatan Kompetensi Guru dalam Penggunaan Learning Manajemen System (LMS) dengan Memanfaatkan Aplikasi Edmodo Henny Prasetyani; Dewi Purnamasari; Jumrianto Jumrianto; Aeni Nikhlah
Jurnal Anugerah Vol 4 No 2 (2022): Jurnal Anugerah: Jurnal Pengabdian kepada Masyarakat Bidang Keguruan dan Ilmu Pen
Publisher : Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/anugerah.v4i2.4683

Abstract

Edmodo merupakan salah satu Learning Manajement System (LMS) yang dapat digunakan dalam pembelajaran secara e-learning karena fiturnya dapat menghasilkan pembelajaran yang menarik dan tidak monoton. Implementasi Edmodo dapat diterapkan di sekolah sebagai penyempurna LMS yang sudah digunakan sebelumnya yaitu Google Classroom. Namun proses perubahan ini perlu ada peningkatan kompetensi guru dalam penggunaan LMS dengan memanfaatkan aplikasi Edmodo, maka dari itu tim pengabdian merumuskan kegiatan pengabdian kepada masyarakat berupa pelatihan untuk mengatasi permasalahan tersebut. Bentuk pengabdian yang dilakukan berupa kegiatan pelatihan aplikasi Edmodo bagi para guru di SMPN 2 Sukolilo melalui pemaparan materi terkait Edmodo, dilanjutkan dengan praktik langsung oleh para guru dengan pendampingan. Pada bagian akhir dilakukan evaluasi untuk mengetahui keberhasilan program pengabdian melalui wawancara langsung dan respons peserta pelatihan melalui angket. Hasil yang diperoleh yaitu sebagian guru sudah mengalami peningkatan kompetensi ditandai dengan mampu untuk menerapkan Edmodo baik menggunakan media komputer/laptop atau media smartphone di proses pembelajarannya dan respons guru terhadap pelatihan ini sudah baik.
Evaluation of Information Technology Service Devices At High Schools in Kendal Regency With ITIL 4.0 Herlinudinkhaji, Didin; Purnamasari, Dewi; Erwanti, Nindita
Journal of Computer Networks, Architecture and High Performance Computing Vol. 6 No. 3 (2024): Articles Research Volume 6 Issue 3, July 2024
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/cnahpc.v6i3.4382

Abstract

Schools as educational institutions with information technology services in the form of New Student Admission Systems, e-report systems, and other information technology services require devices supported by good service. Information technology devices must be appropriately managed to conduct business processes according to business goals. With good service management, the business value offered to customers (students) will increase. ITIL V4 contains information technology service management guidelines that contain best practices for information technology service management, including attention to customer experience, value streams, and support for current digital transformation. This research measures information technology equipment services at high schools in Kendal Regency. This research uses indicators adapted to schools with ITIL V4: Key Performance Indicators (KPI) and Critical Success Factors (CSF). The results of this research show that the performance of the hardware needs to be improved, and the value of the maturity model for each service device is still not good.
PEMANFAATAN E-JUMANTIK SEBAGAI UPAYA MENDUKUNG SDGS DALAM PENCEGAHAN DEMAM BERDARAH DENGUE (DBD) DI KELURAHAN KUDU KECAMATAN GENUK Mulyawati, Isti; Purnamasari, Dewi; Nayazik, Akhmad
Jurnal Abdimas Bina Bangsa Vol. 5 No. 2 (2024): Jurnal Abdimas Bina Bangsa
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/jabb.v5i2.1366

Abstract

Dengue Hemorrhagic Fever (DHF) cases in Kudu Village, Genuk District, Semarang City, have increased significantly in recent years. Prevention efforts through the one house one Jumantik (mosquito larvae monitoring officer) program are considered to still have obstacles, especially in terms of data collection and processing which is carried out manually. This community service aims to develop and implement an Android-based E-Jumantik application as an innovative solution in supporting the Jumantik program and supporting the achievement of the Sustainable Development Goals (SDGs), especially in the aspect of sustainable health. The methods used in this service include socialization to the community, training on the use of the application for Jumantik cadres, implementation of the application in the field, as well as mentoring and evaluation. The results of the service show that the E-Jumantik application is able to increase efficiency and accuracy in collecting mosquito larvae monitoring data. In addition, this application facilitates the reporting and monitoring process, thus enabling early detection of the potential spread of DHF. From the implementation of this program, there has been an increase in the knowledge and skills of Jumantik cadres in using technology, as well as an increase in public awareness regarding DHF prevention. The E-Jumantik application provides a significant contribution in optimizing the management of mosquito larvae monitoring and is expected to be adopted in other regions as a preventive measure to reduce the number of dengue fever cases
Pemanfaatan Google Ads dan Instagram Ads sebagai Strategi Pemasaran untuk Pelaku UMKM Herlinudinkhaji, Didin; Erwanti, Nindita; Ramadhani, Lingga Kurnia; Purnamasari, Dewi; Masruroh, Nila Masalikul
Jurnal Sosial & Abdimas Vol 7 No 1 (2025): Jurnal Sosial & Abdimas
Publisher : LPPM Universitas Adhirajasa Reswara Sanjaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51977/jsa.v7i1.1735

Abstract

Usaha mikro kecil menengah (UMKM) perlu memasarkan produk melalui platform digital agar bisa terus berkembang. Salah satu strategi pemasaran yang dapat diterapkan adalah iklan digital. Pelaku UMKM yang ingin cepat meningkatkan pelanggan dan pendapatan dapat beriklan agar membangun kesadaran konsumen adanya usaha dan produk yang dimiliki. Keunggulan menggunakan iklan digital diantaranya peningkatan jangkauan pemasaran, target audiens yang efektif, hasil yang terukur, dan efektivitas biaya. Banyak sarana yang dapat digunakan untuk memasang iklan, Google Ads dan Instagram Ads dapat menjadi media alternatif untuk menerapkan strategi tersebut. Namun demikian, para pelaku UMKM jarang memahami hal itu karena cenderung dianggap kompleks. Oleh karena itu, kegiatan pengabdian kepada masyarakat harus mengajarkan periklanan digital melalui Google Ads dan Instagram Ads kepada pelaku UMKM. Kegiatan dilakukan dengan cara mendampingi para pelaku UMKM di desa Mangunsari, kecamatan Gunungpati, kota Semarang. Hasil kegiatan ini adalah meningkatnya pemahaman dan kemampuan menerapkan iklan digital melalui Google Ads dan Instagram Ads.
Energy-Saving Handwasher Design Using Infrared Obstacle Sensor Based On Arduino Microcontroller Jumrianto Jumrianto; Dewi Purnamasari
Jurnal Inovasi Pendidikan dan Sains Vol 5 No 3 (2024): December
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Nahdlatul Wathan Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51673/jips.v5i3.2292

Abstract

The Covid-19 pandemic is over, the good habit of washing hands with soap must be maintained, because it concerns a clean and healthy lifestyle. The unavailability of automatic hand washing devices on the IVET University Campus is a motivation to create an application tool, in its application it will use an infrared obstacle sensor by coding commands through Arduino software. Based on a review of previous research, no one has designed a hand washer device with an energy-efficient infrared obstacle sensor. Utilizing Arduino software and hardware with a current consumption of <0.050 amperes on standby. When operating, this device consumes a current of <0.5 amperes which opens and closes the water tap. The operating voltage of the microcontroller is 5 volts, so this device consumes 2.5 watts of electricity, and if it operates for 1000 hours or for ±41 days continuously without stopping, it only uses 2.5 KWh of electricity and when on standby for 1000 hours this device uses 0.25 KWh of electricity.
Rancang Bangun Sistem Informasi Survei Kepuasan Pelanggan Berbasis Web menggunakan Metode Prototype (Studi Kasus Pada Toko Audi Elektronik Semarang) Dinda Resti Octaviana; Dewi Purnamasari; Kurniawati Kurniawati
Joined Journal (Journal of Informatics Education) Vol 8 No 1 (2025): Volume 8 Nomor 1 (2025)
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joined.v8i1.3895

Abstract

Toko Audi Elektronik Semarang merupakan toko ritel yang bergerak di bidang penjualan barang elektronik belum memiliki sistem untuk mengumpulkan umpan balik pelanggan, baik melalui kotak saran maupun survei kepuasan pelanggan sehingga menyulitkan mengevaluasi kualitas layanan dan produk. Penelitian ini bertujuan untuk merancang dan membangun sistem informasi survei kepuasan pelanggan berbasis web bertujuan untuk mempermudah proses pengumpulan, penyimpanan, dan analisis data kepuasan pelanggan secara lebih sistematis dan terstruktur. Metode yang digunakan adalah metode prototype berdasarkan masukan pengguna. Pengujian sistem dilakukan dengan metode black box testing difokuskan pada aspek fungsionalitas. Hasil pengujian menunjukkan bahwa seluruh fungsi utama pada sistem, seperti pengisian survei, penyimpanan data, dan penampilan hasil survei, berjalan sesuai dengan skenario yang telah dirancang. Dengan demikian, sistem ini dinilai telah memenuhi aspek fungsional yang dibutuhkan dan siap digunakan sebagai sarana untuk mendukung evaluasi layanan dan pengambilan keputusan berdasarkan umpan balik pelanggan.
Deepfake Image Detection Using Transfer Learning Method Tsalatsatun Nur Rohmah; Dewi Purnamasari; Kurniawati Kurniawati; Didin Herlinudinkhaji; Yunifa Miftachul Arif; Santiago Criollo-C
International Journal of Electrical and Intelligent Engineering Vol 1, No 2 (2025)
Publisher : Department of Electrical Engineering Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/ijeie.v1i2.40796

Abstract

The development of Artificial Intelligence (AI) technologies, particularly deep learning has led to the emergence of innovative applications such as deepfake technology, which enables the realistic manipulation of digital images and videos. While this technology offers positive applications in fields such as entertainment and education, it also poses significant risks of misuse, particularly in the dissemination of false information and violations of privacy. Therefore, deepfake detection has become a crucial aspect in preserving the authenticity of digital content. This study aims to analyze the effectiveness of transfer learning methods in detecting deepfake images using VGG16, VGG19, and ResNet50 architectures. The research employs a dataset of deepfake and real images sourced from Kaggle, comprising 10,826 facial images with a resolution of 256 × 256 pixels, evenly balanced between authentic and manipulated content. The data are split in an 80:20 ratio for training and testing purposes. Each model is trained using identical parameter configurations. The performance evaluation of the models was conducted using confusion matrix metrics, including accuracy, precision, recall, and F1-score. The results indicate that the VGG16 model achieved the best performance, with an accuracy of 76%, followed by VGG19 at 72%, and ResNet50 at 58%. VGG16 also outperformed the other models in terms of precision, recall, and F1-score, demonstrating more effective performance in identifying visual manipulation patterns. In contrast, ResNet50 exhibited the lowest performance, which may be attributed to its architectural complexity not being optimally aligned with the characteristics of the dataset. It can be concluded that the transfer learning approach using the VGG16 model is more effective in detecting deepfake images on this dataset. This study also highlights the importance of selecting appropriate architectures and fine-tuning models to the characteristics of the data.
EDUKASI MIKTIGASI BANJIR BERBASIS AUGMENTED REALITY UNTUK KOMUNITAS BERKELANJUTAN Dewi Purnamasari; Soraya Rosna Samta; Rizal Ichsan Syah Putra; Nelly Zulfa; Ahmad Riki Andreas
Abdi Masya Vol 7 No 1
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abdimasya.v7i1.605

Abstract

Community education on flood disaster mitigation often faces challenges because conventional methods are less interactive. This community service program aims to enhance disaster literacy and preparedness within community groups through innovative, technology-based educational media. The method employed was participatory training, with lectures, interactive discussions, and a primary focus on demonstrating and using an Augmented Reality (AR) application specifically designed for flood-mitigation simulation. The activity was attended by 30 members of a women's community empowerment group. The results indicated a significant increase in participants' understanding, as measured by pre- and post-tests, with the average score rising from 52.5 to 87.8. Qualitative feedback also revealed high enthusiasm, with 95% of participants stating that the AR-based learning method was more engaging and easier to understand than traditional counseling. The conclusion of this program is that AR technology is highly effective as a medium for participatory education in improving community preparedness for flood disasters. This innovative approach is recommended.
Co-Authors Aeni Nikhlah Ahmad Bais Ahmad Imtiyaz Najih Ahmad Riki Andreas Akhmad Nayazik Anisatul Maula Didin Herlinudinkhaji, Didin Dinda Resti Octaviana Handini Arga Damar Rani Handini Arga Damar Rani Handini Ika Jihan Pratiwi Isti Mulyawati Jumrianto Jumrianto Jumrianto Jumrianto Jumrianto Kurniawati Kurniawati Kurniawati Kurniawati Kurniawati Lenny Kurniati Lingga Kurnia Ramadhani Masruroh, Nila Masalikul Muhamad Luthfi Hakim Nelly Zulfa Nia Fatikasari Nindita Erwanti Prasetyani, Henny R.Irlanto Sudomo Ratna Sari Riffa Bella Wahyu Rizal Ichsan Syah Putra Santiago Criollo-C Setiyawan Jordi Soraya Rosna Samta Sri Widayati Tsalatsatun Nur Rohmah Wijayanti Kusuma Sari Yunifa Miftachul Arif zulfa, nely