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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Conservation Jurnal Teknologi Edu Elektrika Journal Edu Komputika Journal Jurnal Infomedia INSIST (International Series on Interdisciplinary Research) JISKa (Jurnal Informatika Sunan Kalijaga) Jurnal Abdi Insani Journal of Industrial Community Empowerment Jurnal INFOTEL Sainteknol : Jurnal Sains dan Teknologi Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Arfriandi, Arief
Program Studi Teknik Komputer Universitas Negeri Semarang
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Other

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Implementasi Algoritma RC4 pada Sistem Pengamanan Dokumen Digital Soal Ujian Fauziyah Suwarsita Febriyani; Arief Arfriandi
JISKA (Jurnal Informatika Sunan Kalijaga) Vol. 6 No. 3 (2021): September 2021
Publisher : UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (347.774 KB) | DOI: 10.14421/jiska.2021.6.3.171-177

Abstract

The development of science and technology has led to changes in the use of documents in life to become digital data. However, this can cause problems, namely regarding data security and confidentiality. To increase security and confidentiality can be done with cryptographic algorithm RC4. The research method uses the Waterfall method. The result of this research is a website that can secure document files with * doc extension using the RC4 algorithm. The test was carried out using the blackbox test and the CrackStation test for encryption testing. The results of the test show that the website can run well and successfully implements the RC4 algorithm.
Pengendali Listrik Rumah Berbasis Cloud Computing Nur Iksan; Arief arfriandi
JURNAL INFOTEL Vol 7 No 1 (2015): May 2015
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v7i1.30

Abstract

Makalah ini membahas mengenai cara untuk mengurangi konsumsi energi pada rumah melalui penyediaan informasi kepada penghuni mengenai penggunaan listrik di rumahnya, dan menyediakan cara yang efektif untuk merespon informasi tersebut. Makalah ini mengusulkan sebuah Sistem Monitoring Listrik Rumah (SMLR). Sensing, monitoring, dan actuating adalah bagian dari SMLR yang berperan penting dalam mengurangi konsumsi energi di rumah dapat diakses melalui web browser dan perangkat mobile. Sistem ini dibangun dalam sebuah platform cloud computing yang menyediakan tools dan mekanisme yang membantu pengembangan aplikasi di lingkungan cloud yang membantu user untuk memonitor dan mengontrol peralatan listrik yang ada dirumah. Hasil Riset ini diharapkan dapat mendorong pengguna untuk mengubah kebiasaan mereka dalam menggunakan listrik. Pengguna akan memperhatikan penggunaan listrik mereka karena mereka sadar untuk menggunakan listrik se-efisien mungkin. Semakin banyak listrik yang dihemat, semakin sedikit mereka menghabiskan uang untuk membayar tagihan.
PEMANFAATAN TEKNOLOGI COMPUTER VISION BERBASIS YOLO UNTUK MENDETEKSI KERUMUNAN DI SMKN 4 MALANG Anan Nugroho; Faizal Indaryanto; Alfa Faridh Suni; Arief Arfriandi; Hari Wibawanto; Dwi Oktaviyanti; Dina Wulung Savitri
Jurnal Abdi Insani Vol 11 No 1 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i1.1437

Abstract

In limited face-to-face learning, teachers and students must implement health protocols to prevent the spread of the Covid-19 virus. However, implementing health protocols in schools as a new habit in the midst of a pandemic is certainly not easy. There are many reports related to the number of violations of health protocols in schools during face-to-face learning. Therefore, by innovating and utilizing existing technology in the 4.0 era can help us to detect social boundaries. The purpose of this service activity is so that teachers and students can learn YOLO-based computer vision technology at SMKN 4 Malang as a means of preventing the spread of Covid-19. In addition, teachers and students can also learn to make simple applications based on YOLO. This activity begins with the socialization of YOLO-based computer vision technology as a crowd detection tool to the school. Then the design and manufacture of crowd detection tools by the service team, training in making crowd detection applications, and ending with a discussion between the trainees and the service team. The results of the service show that this activity has succeeded in developing a crowd detection tool that can help calculate the number and distance of people who do not apply health protocols at SMKN 4 Malang. This tool makes it easier for schools to monitor the activities of school residents in implementing health protocols. This service activity is very useful and in demand by teachers and students. This is evidenced by the enthusiasm of the participants in participating in the training of YOLO-based crowd detection tools.
Teknologi Dekafeinasi Biji Kopi Sederhana Untuk Industri Kecil di Desa Sriwulan Kabupaten Kendal Putri, Radenrara Dewi Artanti; Arfriandi, Arief; Nurmasitah, Sita; Megawati, Megawati; Pangestu, Indra Sakti; Salsabila, Luvena; Sitanggang, Desy Manuela Boru
Journal of Industrial Community Empowerment Vol 3, No 1 (2024): Published in April 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i1.235

Abstract

Coffee is one of the leading commodities in Sriwulan Village, Kendal. This certainly has great potential for the economy to grow the MSME movement in the local community. The superior product that has been marketed is ground coffee in general which has quite a high caffeine content. Coffee with low caffeine content is currently a trend on the market and is popular with many health-conscious people. At the industrial level, widely developed decaffeination processes often use imported technology, both at the hardware and software level, which results in the price of low-caffeinated coffee still being relatively high. Limited public access to information regarding decaffeination techniques in coffee means consumers of low-caffeine coffee are willing to pay high prices to get a product that suits their tastes. The process of decaffeinating coffee beans can add value to the selling value of Indonesian coffee commodities, especially in Sriwulan Village, Kendal Regency. The aim of this service activity is to provide education and equipment assistance to the Sriwulan Village community about low-caffeine coffee and its production process to more attractive packaging, so that partner communities can take advantage of this to improve the economy of Sriwulan Village. The method of implementing this activity is carried out through the survey stage, training and monitoring stages. The implementation stage is carried out by processing coffee beans that have been peeled and dried in the sun, then steamed at a temperature of 100oC for 90 minutes. Coffee beans that have been steamed are ready to be dried and roasted according to the steps usually carried out by coffee farmers in Sriwulan Village. This service succeeded in increasing the understanding and interest of coffee producers in Sriwulan Village to develop low-caffeine coffee products. The program implemented can produce coffee beans that experience a reduction in caffeine levels of up to 80.8% after testing caffeine levels.
Sign Language Detection Application to Facilitate Communication for Speech and Hearing Impaired Individuals Based on Computer Vision Technology Using Inception Resnetv2 Arief Arfriandi; Yoga Agung Prabowo; Moh Dafi Najuda; Tri Anggi Ratna Puspita; Shakira Wahyu Virnanda; Said Sunardiyo
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol. 20 No. 2 (2022)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v20i2.19433

Abstract

Communication is a fundamental human need, yet not everyone possesses perfect communication abilities. People Communication is a fundamental human need, yet individuals with speech and hearing impairments face challenges due to the limited understanding of sign language among the general public. This study applies Artificial Intelligence and Computer Vision to enhance communication accessibility by detecting hand gestures and converting them into text. The lack of real-time sign language translation remains a barrier for individuals with disabilities. Existing systems often struggle with accuracy and device compatibility. This research develops and evaluates HARDISC, an Android-based application that recognizes letters A–Z through hand movement detection using a camera. The goal is to provide an effective and inclusive communication tool for the speech and hearing impaired. HARDISC utilizes Transfer Learning with Inception ResNetV2 and VGG16 for gesture classification. Image processing enables the camera to detect and translate hand movements into text. Model evaluation was based on accuracy, loss values, and device compatibility. Results show Inception ResNetV2 achieved 98.98% accuracy with a 0.0417 loss value, while VGG16 recorded 99.40% accuracy with a 0.0146 loss value, demonstrating high performance. HARDISC is compatible with Android KitKat 4 to Android 12, ensuring accessibility. This application provides an innovative, real-time solution to bridge communication gaps for individuals with speech and hearing impairments, improving their interaction with the general public.
Implementation of Hierarchy Attribute-Based Encryption (HABE) to Secure Information Stored in Cloud Storage Arfriandi, Arief; Gernowo, Rahmat; Isnanto, R. Rizal
Sainteknol : Jurnal Sains dan Teknologi Vol. 23 No. 1 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v23i1.22239

Abstract

The usage of cloud storage is currently growing, particularly for media used for information storage. Information saved in cloud storage makes it possible for the owner of the cloud storage to access the Information without the owner's permission. The privacy of access and management of access to the information kept in the cloud storage becomes a problem and security risk when using that cloud storage because the owner cannot ensure that the stored information is only accessed by authorized parties. Access control management is necessary for information owners to guarantee the safety of the information they hold. To regulate access to information kept in cloud storage, this study intends to apply the Hierarchy Attribute-Based Encryption (HABE) technique. A hierarchical attribute base is used to encrypt and decode information saved in cloud storage through the application of HABE, making hierarchical attributes the essential element in controlling access to the information. The hierarchical structure utilized to manage access control for information security will also be detailed in this research. This implementation procedure is completed before the information is stored in cloud storage. The mathematical computations used to secure text information during the encryption and decryption operations are described in the HABE implementation method and debate. By using Hierarchy Attribute-Based Encryption, security concerns with cloud storage can be resolved and flexible access control management in compliance with corporate standards is made possible.  
Implementation of Augmented Reality as Information and Promotion Media on Dieng Tourism Area Affan, Banu Nur; Suryanto, Agus; Arfriandi, Arief
International Series on Interdisciplinary Science and Technology Vol. 3 No. 1 (2018)
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ins.v3i1.128

Abstract

Information becomes necessary for tourists to get and improve the knowledge of tourism and their experiences about tourist destination. In Dieng tourism area, tourist information and promotional media has not been structured, as well as the need of media. The purpose of this research is produce Augmented Reality application that can visualize information of Dieng tourism, as interactive and interesting information, promotion tourism media. This research produces an android application which is used as information and promotion media of tourism in Dieng. Testing according to ISO 25010 with functional suitability got 100% suitability with Blackbox test, on portability aspect application successfully installed, update and uninstall on various smartphone environment, on performance efficiency aspect show average launch time is 1817 ms and also 0,22% CPU and 177,8 MB Memory usage. Results usability obtained SUS score 79.6 indicates the application get acceptable category to be used as information and tourism promotion media in Dieng.
Co-Authors Affan, Banu Nur Agus Suryanto Agus Suryanto Agus Suryanto Alfa Faridh Suni Anan Nugroho Banu Nur Affan Banu Nur Affan Dina Wulung Savitri Djuniadi Djuniadi Dwi Oktaviyanti Dwi Oktaviyanti Faizal Indaryanto Fauziyah Suwarsita Febriyani Hari Wibawanto Megawati - Moh Dafi Najuda Nur Iksan Nurmasitah, Sita Pangestu, Indra Sakti Putri, Riana DM Putri, Riana DM R. Rizal Isnanto Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Rahmat Gernowo SAID SUNARDIYO Salsabila, Luvena Shakira Wahyu Virnanda Sitanggang, Desy Manuela Boru Tri Anggi Ratna Puspita yoga agung prabowo