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All Journal Adi Widya : Jurnal Pengabdian Masyarakat ABDIMAS SILIWANGI Jurnal Pengabdian Magister Pendidikan IPA Jurnal Teknik Mesin Indonesia Infotekmesin Mobile and Forensics Jurnal Engine: Energi, Manufaktur, dan Material Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal E-Komtek De`Teksi : Jurnal Teknik Sipil Kultura: Jurnal Ilmu Sosial dan Humaniora Indonesian Journal of Chemical Science Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB) Chemistry in Education
Harjono
Jurusan Arsitektur Fakultas Teknik Universitas Muhammadiyah Jakarta
Aerospace Engineering Arts Humanities Automotive Engineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Social Sciences Transportation Other

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Journal : Jurnal E-Komtek

 1 
Optimization of Double Exponential Smoothing Model for Daily Earth Temperature Forecasting in Dayeuhluhur, Cilacap Ridzna Asep Purwanto; Hakim, Dimara Kusuma; Supriyono; Harjono
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 1 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i1.2396

Abstract

Global warming has caused an increase in the Earth's surface temperature, which has a significant impact on the environment and human life. This study aims to predict the daily surface temperature in Dayeuhluhur District, Cilacap, for the next one year using the Double Exponential Smoothing (DES) method. The data used comes from the NASA POWER platform with a time span of 2015 to 2025, including three main variables: earth surface temperature (TS), solar radiation (ALLSKY_SFC_SW_DWN), and maximum 10-meter wind speed (WS10M_MAX). Preprocessing was done by removing February 29 in leap years and applying annual differencing (lag 365) to stabilize the seasonal pattern. Smoothing parameters α and β were optimized based on Mean Absolute Percentage Error (MAPE) values. Results show a moderate and consistent increasing trend in temperature, with the best accuracy in the temperature variable (MAPE 2.41%), followed by solar radiation (21.56%) and wind speed (30.18%). This method proves effective in forecasting temperature with clear seasonal patterns and contributes to supporting data-driven climate change mitigation policies.
Digital Forensics Implementation on CCTV Using ISO/IEC 27037 and ISO/IEC 27042 Maulana, Zakaria Dwi Arman; Mukhlis Prasetyo Aji; Agung Purwo Wicaksono; Harjono
Jurnal E-Komtek (Elektro-Komputer-Teknik) Vol 9 No 2 (2025)
Publisher : Politeknik Piksi Ganesha Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37339/e-komtek.v9i2.2920

Abstract

Digital evidence in the form of CCTV footage is crucial data in legal investigations, but its integrity and authenticity are often questioned due to the lack of standardization of digital forensic procedures. This study aims to design and test the effectiveness of the implementation of a digital forensic framework based on the international standards ISO/IEC 27037:2012 (guidelines for acquisition and preservation) and ISO/IEC 27042 (guidelines for analysis and interpretation). The research method involves the application of the four-stage procedural ISO/IEC 27037 (Identification, Collection, Acquisition, and Preservation) on a CCTV V380 MicroSD card, followed by analysis using ISO/IEC 27042 principles and Autopsy software. The results show that this framework is fully effective. The integrity of the digital evidence is guaranteed, evidenced by the consistency of hash values ​​(MD5 and SHA1) that are verified Matched throughout the acquisition process until the preparation for analysis. Furthermore, the analysis procedure successfully retrieves information from videos that have been deleted from Unallocated Space, complete with important forensic metadata. This study concludes that the ISO/IEC framework has proven effective in ensuring the authenticity of evidence, and is therefore recommended as a scientifically and legally valid standard operating procedure model for forensic practitioners.
Co-Authors Agung Purwo Wicaksono Akhmad Darmawan Alighiri, Dante Alva Rizki Amanullah Annisa Nurul Alimah Cahyo Budi Utomo Cepi Kurniawan Dahlanuddin Dahlanuddin Dimara Kusuma Hakim Dwi Fitrianti Ermadi Satriya Wijaya Erniyawati Mustaqomah, Erniyawati F. Widhi Mahatmanti Fariz Maulana Rizki Fatimah Diyah Ajeng Anggraini Felixtianus Eko Wismo Felixtianus Eko Wismo Winarto Hutami , Sri Iis Naeni Putri Wahyuni Irfan Bahiuddin Ismawati septiningsih Isyanto, Muhamad Sandi ITOK DWI KURNIAWAN Khaerudin, Arif Khoiriyah, Fatimah Kristiyadi Kurniawan, Dafa Rizki Luthfi Wifaqi, Ahmad Naufal Mandala, Wirawan Widya Mardiansyah Mastur Maulana, Zakaria Dwi Arman Mohammad Alauhdin Mohammad Alauhdin, Mohammad Mukhlis Prasetyo Aji Muslih, Imam Nasmi Herlina Sari Nuril Huda Oktavian, Dicky Oktaviani, Salsabil Zhafirah Oscar Yanurianto Prasetyo, Ridho Prihadianto, Braam Delfian Putra Permana, Dimas Putri, Felia Annisa Resihono , Legowo Dwi Retnoningrum Ridzna Asep Purwanto Riska Putri Mawarni Santosa, Nugroho Sarjana Rini, Luluk Takari Senda Kartika Rakainsa Setiawan, Widia Sigit Priatmoko Sri Rahayu, Bakti Sri Susilogati Sumarti SUGIYANTO Suhubdy Sukarne Sukarne Sukarne Sukarne, Sukarne Sulistyani, Martin SUPRIYONO Surojo Sutaryono, Yusuf Akhyar Syalsa Bella Fitriana Tasya Aulia Pratiwi Wahid Yulianto Wiyono, Al Difa Naufal Akmal Yusuf A. Sutaryono Yusuf Akhyar Sutaryono Yusuf Akhyar Sutaryono Sutaryono