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All Journal Information Technology and Telematics Dinamik Elkom: Jurnal Elektronika dan Komputer IKRA-ITH Informatika : Jurnal Komputer dan Informatika INTECOMS: Journal of Information Technology and Computer Science IKRA-ITH ABDIMAS Jurnal ICT : Information Communication & Technology Zonasi: Jurnal Sistem Informasi Jurnal Informatika dan Rekayasa Perangkat Lunak Infotek : Jurnal Informatika dan Teknologi Dinamika Informatika: Jurnal Ilmiah Teknologi Informasi Jurnal Pengabdian Masyarakat Intimas (Jurnal INTIMAS): Inovasi Teknologi Informasi Dan Komputer Untuk Masyarakat Duta Abdimas: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Pada Masyarakat Jurnal Abdimastek (Pengabdian Masyarakat Berbasis Teknologi) Masyarakat Berkarya: Jurnal Pengabdian dan Perubahan Sosial International Journal of Information Technology and Business
Rara Sri Artati Redjeki
Universitas Stikubank
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Pemanfaatan Gemini AI untuk Kreasi Konten Visual Promosi UMKM Kota Semarang Rara Sriartati Redjeki; Eko Nurwahyudi; Purwatiningtyas Purwatiningtyas; Budi Hartono; Theresi Dwiati Wismarini
Masyarakat Berkarya : Jurnal Pengabdian dan Perubahan Sosial Vol. 2 No. 4 (2025): November : Masyarakat Berkarya : Jurnal Pengabdian dan Perubahan Sosial
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/karya.v2i4.2240

Abstract

This community service activity stems from a core challenge faced by Micro, Small, and Medium Enterprises (MSMEs) in Semarang City: the difficulty in consistently producing high-quality promotional visual content, primarily due to budget constraints and the lack of professional design skills. This condition severely hampers their competitiveness in the digital marketplace. The main goal of this activity was to enhance the technical capability of MSME participants in using Gemini AI as a multimodal model to generate professional, ready-to-use visual assets, thereby achieving significant cost and time production efficiency. The solution offered was a hands-on training focusing on Prompt Engineering defined as the art of formulating detailed commands to control the AI's output. The activity was conducted through an intensive workshop and case study mentorship for 25 MSME actors. The evaluation results demonstrated a highly significant increase in competence. The participants' average cognitive score drastically rose from 48.5% on the pre-test to 87.9% on the post-test, proving the successful mastery of Prompt Engineering. Applied results showed that participants were able to produce product visual assets with an average quality of 87.5%. Participant satisfaction reached 95.0%, especially concerning the indicators of cost and time efficiency. This activity successfully democratized design, empowering MSMEs to be self-sufficient in content production, and tangibly strengthening their brand identity and competitiveness across digital platforms.
Adopsi Generator Kunci Euler Number dan Pembangkit Kunci Blum Blum Shub untuk Meningkatkan Confidentiality Level pada Extended Vigenere Ardhianto, Eka; Redjeki, Rara Sriartati; Supriyanto, Edy; Murti, Hari; Wahyudi, Eko Nur
Infotek: Jurnal Informatika dan Teknologi Vol. 7 No. 1 (2024): Infotek : Jurnal Informatika dan Teknologi
Publisher : Fakultas Teknik Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/jit.v7i1.21512

Abstract

Algoritma Vigenere merupakan model algoritma enkripsi yang masih dikembangkan dalam bidang keamanan informasi saat ini. Salah satu aspek yang dianggap penting dalam bidang keamanan informasi adalah kerahasiaan. Masalah pencapaian kerahasiaan pesan atau informasi yang tinggi sangat penting dalam bidang keamanan informasi. Extended Vigenere dikenal sebagai evolusi dari Vigenere yang menerapkan lebih banyak set karakter. Salah satu pengembangan algoritma Vigenere adalah dengan memodifikasi generator kunci yang digunakan. Eksperimen ini bertujuan untuk menguji pengaruh kerahasiaan informasi pada penggunaan generator kunci Blum Blum Shub (BBS) dan nomor Euler yang diterapkan pada Extended Vigenere. Metode pembangkitan kunci BBS dan nomor Euler digunakan secara berurutan. Sebagai metrik pengukuran, perhitungan entropi dari keluaran Extended Vigenere digunakan. Hasil yang diperoleh berupa peningkatan kerahasiaan informasi yang signifikan dengan nilai entropy achievement lebih dari 79% dari entropy optimum.
SISTEM REKOMENDASI PEMILIHAN MOBIL MENGGUNAKAN METODE MOORA Galuh Pradana; Rara Sri Artati Rejeki
Elkom: Jurnal Elektronika dan Komputer Vol. 16 No. 2 (2023): Desember : Jurnal Elektronika dan Komputer
Publisher : STEKOM PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/elkom.v16i2.1290

Abstract

Many manufacturers create numerous types of automobiles with diverse advantages ranging from engine capacity, type of design, and fantastic features to their products in response to the large number of enthusiasts and requests from the general public. Consumers are frequently perplexed while making decisions regarding brand, model, type, price, engine capacity, transmission, year of manufacturing, fuel capacity, and other aspects of the car's benefits due to the growing range of options available. Brand, model, type, price, engine and transmission size, year of production, and gasoline capacity are all factors in choosing a car. The MOORA system only recommends vehicles from the three well-known manufacturers Honda, Toyota, and Suzuki. A Honda CRV with a value of Y_i = 0.225 was recommended as the first recommendation, followed by a Honda BRV with a value of Y_i = 0.211, and a Honda Brio with a value of Y_i = 0.204. The recommendations were based on Honda brand criteria and CVT transmission.
New Design of Encryption with Covertext and Reordering Eka Ardhianto; Widiyanto Tri Handoko; Hari Murti; Rara Sri Artati Redjeki
International Journal of Information Technology and Business Vol. 5 No. 2 (2023): April : International Journal of Information Technology and Business
Publisher : Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/ijiteb.522023.01-05

Abstract

Documents for some entities are confidential and important, so security is required. Encryption with Covertext and Reordering (ECR) is a text-based document security model. ECR uses a random key to generate the ciphertext. The ECR’s random key is selected using the human-generated method. This research aims to increase the level of document security based on the ECR mechanism. This paper proposes a new method by using a random key in a permutated table. The random key is generated automatically by a function. The entropy is used as a measurement of the security level of the encrypted documents. The experimental shows that the permutated table inside the ECR provides better entropy values. It implies a better security level. The use of permutated tables also makes it easier to use ECR to secure documents.
PEMANFAATAN SABUT KELAPA SEBAGAI PEWARNA ALAMI BATIK BAGI MASYARAKAT KELURAHAN SEMBUNGHARJO KECAMATAN GENUK KOTA SEMARANG Mariana, Novita; Utomo, Agung Prasetyo; Redjeki, Rara Sriartati; Santoso, Dwi Budi
Jurnal Pengabdian Masyarakat Berbasis Teknologi Vol 2 No 1 (2021): VOLUME 2. NO 1. APRIL 2021
Publisher : ISB Atma Luhur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32736/abdimastek.v2i1.1119

Abstract

Bahan pewarna alami umumnya berasal dari tumbuh-tumbuhan, seperti kayu, kulit kayu, akar, kulit akar, biji, kulit biji, daun, maupun bunga. Proses pewarnaan dengan menggunakan zat warna alam memang lebih rumit jika dibandingkan dengan menggunakan zat pewarna sintetis dan warna-warna yang dihasilkan memang cenderung menjadi lembut serta bersifat unik dan eksklusif dikarenakan karakteristik dari tumbuhan dan faktor lingkungan lah yang mempengaruhinya. Lingkungan di Wilayah Kelurahan Sembungharjo terkenal dengan tanaman pohon kelapa. Dimana hampir di setiap halaman depan atau belakang rumah penduduk memiliki tanaman pohon kelapa. Penduduk setempat menjual buah kelapa dan membuang sabut kelapanya, sehingga semakin banyak limbah sabut kelapa. Dengan semakin banyaknya limbah sabut kelapa, maka limbah tersebut dapat dimanfaatkan sebagai pewarna alam untuk pembuatan batik. Proses pewarnaan kain batik umumnya dilakukan dengan menggunakan pewarna kimia. Dengan menggunakan pewarna alam ini, proses pembuatan batik tentunya menjadi lebih ramah lingkungan. 
Co-Authors - Sunardi achmad, haidhar Agus Prasetyo Utomo ANDAWANERI, MARETHA Arief Jananto Budi Hartono budi hartono Dwi Agus Diartono Dwi Budi Santoso Dwi Budi Santoso Edy Supriyanto Edy Supriyanto Edy Supriyanto Eka Ardhianto Eko Nur Wahyudi Endang Lestariningsih Eri Zuliarso Fakhri Zufar Abhirama Fitika Andraini Galuh Pradana haidhar achmad Hari Murti Hari Murti Luh Putu Ratna Sundari Merita Cahya Kurniasari Murti, Hari Nova Fadhilah Rahmadian Novita Mariana NURUL R, DIKA Purwatiningtyas Purwatiningtyas R. Soelistijadi Sariyun Naja Anwar Setyawati, Apriliana Sulastri Sulastri Theresi Dwiati Wismarini Theresia Dwiati Wismarini Utomo, Agung Prasetyo Veronica Lusiana W. T. Handoko Widiyanto Tri Handoko Wismarini, Th Dwiati WT Handoko Yohanes Suhari Yulizar, Muhammad