JURISTIK (Jurnal Riset Teknologi Informasi dan Komputer)

Audio Forensics with the National Institute of Standards and Technology (NIST) Method using Formant and Bandwidth Statistical Analysis

Muhammad Fauzan Gustafi,Immawan,Panggah — Sun, 01 Jan 2023 00:00:00 +0700

Sound recording is one of the digital files that can be used as evidence in a cybercrime case trial. However, sound recordings are vulnerable to manipulation and are changed to hide information in the audio. Audio forensics is a science that analyzes the owner of the sound from the parameters of the pitch, formant, and spectrogram of an audio file. This research analyzes manipulated sound recordings to determine the ownership of audio recordings using formant statistical analysis and bandwidth using the National Institute of Standards and Technology (NIST). The research object used is the original file and the manipulated file, which has mp3 format. Retrieval of data on a smartphone using the live forensic method. The final result of the research succeeded in getting digital evidence on a smartphone with the Oxygen Forensic Suite 2014 application. The results of extracting the application were two audio files. The Analysis of Variance (ANOVA) analysis results can be concluded that nothing is identical because the F ratio value is smaller than F critical, and the probability P-value is more significant than 0.5. The Likehood Ratio (LR) analysis concluded that the sound recording of evidence with sound original limited evidence to against.

Design and build a website-based student registration information system at the Salafiyah Islamic Boarding School Wonoyoso using the waterfall method

Endang Wahyuningsih,Ahmad nur Rofiq Rofiq — Tue, 27 Dec 2022 00:00:00 +0700

Abstract
The rapid growth of technology today, many agencies are competing with each
other to jump into digitalization. Because digitization can be a value in itself for an
institution. And one of the institutions that need the benefits of this technological
development is in educational institutions. Based on the results of observations made, at
this time the processing of profile data and archiving activities at the Salafiyah Islamic
Boarding School Wonoyoso is still carried out in the conventional way, which is still using
in the form of books or paper so that if it takes a long time to get the information needed.
A website-based registration information system is suitable for providing student
registration services, so that prospective students can register from anywhere. The method
used in this study uses the waterfall method. This system design uses the PHP programming
language and uses blackbox testing. The results of this study resulted in the design of a
website-based student registration information system.
Keywords : Information system, islamic boarding school, waterfall, PHP

Efektivitas Company Profil Sebagai Sarana Promosi di Sosial Media Instagram (Studi Kasus LKP Indo Jaya Kebumen)

M Fahmi Zulfa Fahmi — Mon, 13 Dec 2021 00:00:00 +0700

Semua perusahaan selalu menginginkan terciptanya komunikasi dua arah yang efektif dan efisien. Komunikasi antara perusahaan dengan konsumen mereka lakukan dengan memperhatikan sarana dan media yang dimanfaatkan. Penentuan dan pemilihan media serta bahan promosi menjadi sebuah hal yang sangat penting untuk dilakukan karena menentukan efektivitas dari informasi yang disampaikan. Hal ini sesuai dengan apa yang dilakukan oleh LKP Indo Jaya Kebumen, melalui media sosialnya mereka menjalin komunikasi positif dengan company profil mereka. Tujuan yang diinginkan selama penelitian ini berlangsung yaitu ingin mengatahui efektivitas dari pemanfaatan company profil di Instagram milik LKP Indo Jaya Kebumen sebagai sarana promosi perusahaan. Penelitian ini memanfaatkan metode kuantitatif-deskriptif dengan penelitian survey kepada perusahaan maupun mengobservasi serta menggali informasi kepada beberapa sampel penelitian. Secara hasil penelitian menyatakan bahwa pemanfaatan compaay profil di LKP Indo Jaya Kebumen mampu menjangkau konsumen secara luas dan memudahkan konsumen dalam memahami profil bisnis serta berbagai produk yang diperjual belikan. Untuk itu efektif dalam media promosi perusahaan. Penelitian ini penting untuk dilakukan karena bisa menjadi sumber informasi untuk memanfaatkan company profil bagi para pemilik usaha untuk disampaikan dalam media Instagram sebagai sarana mempromosikan perusahaan maupun promosi produk maupun layanan dalam jangkauan yang lebih luas.

Classification of Emotions on Social Media Using Support Vector Machine and N-Gram

Riska Dwi Handayani,Ahmad Fauzi Anggi A K,Yusuf Wahyu Setiya Purtra — Sat, 31 Dec 2022 00:00:00 +0700

The large number of Facebook social media users in Indonesia provides an opportunity for researchers to study various things through text, one of which is the translation of emotions through status update text which is the main feature of the social media. The status update feature is often used by the public to share information, express opinions on something or express opinions on experiences that are a trend of public attention. In addition, the status update feature is also often used by the public to share the emotions they are currently feeling. To analyze data from Facebook status updates which are irregular in nature, it is necessary to do text analysis using the text mining method.

The author proposes to conduct research on Facebook status updates using the text mining method. Where in this study using N-Gram level feature extraction and the classification method used is the Support Vector Machine (SVM) method. From the tests that have been carried out using this method it produces an accuracy value of 53%. The highest precision values ??are generated by several emotions, namely fear, shock, disgust, and anger with a value of 100%. Furthermore, the highest recall value is generated by the Happy emotion with a value of 100%. And finally, the highest f1-score is generated by the emotion of shock with a value of 67%.