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All Journal Numeracy : Jurnal Ilmiah Pendidikan Matematika Journal of Honai Math Idealis : Indonesia Journal Information System Jurnal Informatika: Jurnal Pengembangan IT
Pratiwi, Septia Ayu
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Computer Science & IT Decision Sciences, Operations Research & Management Education Mathematics Social Sciences

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ANALISIS FORENSIK CITRA DI PLATFORM X MENGGUNAKAN METODE DIGITAL FORENSIC RESEARCH WORKSHOP (DFRWS) Sulistyo, Wicaksono Yuli; Pratiwi, Septia Ayu; Hidayatullah, Muhammad Haedar Zhafran
IDEALIS : InDonEsiA journaL Information System Vol. 8 No. 1 (2025): Jurnal IDEALIS Januari 2025
Publisher : Universitas Budi Luhur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36080/idealis.v8i1.3293

Abstract

One of the negative impacts observed is the uncontrolled behavior of individuals in using personal applications, which has the potential to lead to cybercrimes. Common cases of cybercrime on social media involve posting photos for bullying purposes, spreading false information, fraud, and defamation. Photos can be easily altered or edited, enabling the manipulation of information that could be exploited for malicious activities. Nowadays, the ease of uploading photos and the difficulty in detecting their authenticity are key factors underlying this study, which aims to detect digital photo forgery in the platform X. The study adopts the Digital Forensic Research Workshop (DFRWS) framework to identify instances of digital photo forgery. The key stages implemented in this research include identification, preservation, collection, examination, analysis, and presentation. The findings revealed pixel alterations in the smartphone object area and other regions, indicating manipulation and making the image appear different from the original. Additionally, using FotoForensic, metadata from the photos was successfully retrieved, revealing that the second photo had been edited and previously modified using Adobe Photoshop CC 2017. Furthermore, analysis with ForensicallyBeta identified pixel discrepancies in several parts of the image, showing additional noise, which confirmed that the photo had been edited in specific areas, thus indicating its lack of authenticity.
Number talks: Comparative insight into undergraduate and graduate student literacy Peni, Nur Robiah Nofikusumawati; Pratiwi, Septia Ayu; Prabowo, Anggit
Journal of Honai Math Vol. 7 No. 3 (2024): Journal of Honai Math
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jhm.v7i3.614

Abstract

Variations in competence and confidence among higher education students in mathematical literacy, numeracy, and logical thinking are crucial for developing critical reasoning, problem-solving skills, and the application of quantitative knowledge in both academic and real-world contexts. However, limited research has explored how students from different academic disciplines vary in their competence, confidence, and challenges related to these fundamental areas. This gap in the literature highlights the need for a comprehensive examination of such variations across diverse higher education fields. This study aims to compare the levels of mathematical literacy, numeracy, and logical thinking among university students, focusing on their knowledge, confidence, and the challenges they face. A comprehensive survey was employed, covering several dimensions of mathematical literacy, such as real-world applications of mathematics, numeracy comprehension, numerical self-confidence, and the role of emotions in logical thinking. Drawing on responses from Indonesian university students, the study reveals that students generally perceive their abilities as moderate to good, though significant differences are evident across academic disciplines and levels of study. A notable correlation was found between the focus of students' academic programs and their mathematics literacy, with certain disciplines demonstrating higher competency levels. The findings highlight the importance of integrating practical applications and emotional intelligence into mathematics education to foster greater confidence, knowledge, and engagement. This research contributes valuable insights into mathematical literacy and proposes new strategies to improve teaching practices and curricula. The comparative analysis offers a broader perspective, essential for shaping future assessments in mathematics, logical reasoning, and numeracy literacy.
Deteksi Tepi Menggunakan Metode Operator Prewitt dan Kirsch pada Citra Uang Kertas Sulistyo, Wicaksono Yuli; Arifah, Amalina Nur; Pratiwi, Septia Ayu
Jurnal Informatika: Jurnal Pengembangan IT Vol 10, No 1 (2025)
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v10i1.6292

Abstract

The importance of edge detection in image processing, especially on banknote objects, prompted this research to carry out an analysis of two edge detection methods, namely the Prewitt and Kirsch operators. five images of banknotes with different denominations (2000, 5000, 10000, 20000 and 50000) were taken as research objects. The edge detection method is implemented using MATLAB, utilizing both Prewitt and Kirsch operators. Image quality assessment uses PSNR, Histogram and Pixel value parameters. The comparison results show that the Prewitt and Kirsch operators provide optimal edge detection results, producing clear and sharp edges in the banknote image. The edge detection quality assessment was carried out through the PSNR metric, and both showed PSNR values above 30 dB, indicating good quality in terms of clarity and accuracy. Comparison of the Histogram and Pixel values shows that the Kirsch method has a higher Histogram and the Prewitt method has a higher Pixel value.
STUDY ON LITERACY NUMERACY TOWARDS STUDENTS’ LOGIC MATHEMATICS: A LITERATURE REVIEW Pratiwi, Septia Ayu; Nofikusumawati Peni, Nur Robiah; Prabowo, Anggit
Jurnal Numeracy Vol 11 No 1 (2024)
Publisher : Program Studi Pendidikan Matematika, Universitas Bina Bangsa Getsempena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46244/numeracy.v11i1.2601

Abstract

Numeracy literacy and mathematical logical thinking have a significant relationship in mathematics learning. Therefore, the study of this literacy examines the relationship between literacy, numeracy, and the development of students' logical thinking in the domain of mathematics education. This research aims to delineate the impact of numeracy literacy and logical thinking in shaping students' abilities to understand and apply logical principles in the context of mathematics, given the fundamental importance of literacy and numeracy skills. In this study, a literature review is employed to examine the relationship between literacy, numeracy, and logical thinking in the context of mathematics. The methodology used involves data collection, review processes, and in-depth analysis of scholarly articles sourced from Google Scholar, JSTOR, and PubMed. A total of 105 articles were analysed and categorized into the contexts of literacy, numeracy, and logical thinking in the context of mathematics. The research findings indicate the complexity of the interrelationship between literacy, numeracy, and logical thinking in mathematics education. This research contributes to offering insights into numeracy literacy and logical thinking for educators, researchers, and policymakers interested in enhancing the quality of mathematics education.
Co-Authors Anggit Prabowo, Anggit Arifah, Amalina Nur Hidayatullah, Muhammad Haedar Zhafran Nofikusumawati Peni, Nur Robiah Nur Robiah Nofikusumawati Peni Wicaksono Yuli Sulistyo