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Hidayana, Rizki Apriva

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Author-ID : 7476020

Religion Humanities Computer Science & IT Decision Sciences, Operations Research & Management Dentistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Analysis of Multistability of Financial Risk Chaos Systems and Its Application to Voice Cryptography Yuningsih, SIti Hadiaty; Hidayana, Rizki Apriva; Nurkholipah, Nenden Siti
International Journal of Research in Community Services Vol. 5 No. 3 (2024)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v5i3.699

In the chaos literature, the application of modeling and control of dynamic systems in chaos theory arising in several fields is investigated. In this article we analyze complex financial chaos systems with countries as interest rates, investment demand, and price indices. The proposed chaotic flow's dynamic behavior is examined using phase portraits, eigenvalues, bifurcation diagrams, and Lyapunov exponent spectra. A significant quantity of research on secure communication systems has been published in recent years as a result of the major advancements in communications equipment and encryption techniques. A new voice encryption algorithm design is given using a financial chaos model. An application for voice encryption is conducted using the suggested algorithm, and the outcomes are described.

Senior High School Students' Knowledge of The Role of Mathematics in The Development of Science and Technology Amelia, Rika; Hidayana, Rizki Apriva; Syarifudin, Abdul Gazir; Megantara, Tubagus Robbi; Kholipah, Nenden Siti Nur; Chairunnisa, Nadine Zahra; Manuela, Angellyca Leoni
International Journal of Research in Community Services Vol. 6 No. 1 (2025)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i1.813

Mathematics plays a significant role in developing science and technology (also known as IPTEK in Indonesian). However, students' understanding of the contribution of mathematics to the progress of IPTEK still needs to be improved. This study examines the knowledge of senior high school students (also known as SMA in Indonesian) regarding the role of mathematics in developing IPTEK. The method used is a quantitative survey, and questionnaires were distributed to SMA PGRI Cicalengka students. The data obtained were analyzed to determine the level of students' understanding of the relationship between mathematics and its applications in various fields of science, such as physics, biology, and technology. The study results showed that although most students understand mathematics is important in IPTEK, most still need to learn its specific applications in modern technology and scientific innovation. This study suggests the need for more contextual and applicable learning about the role of mathematics in the development of IPTEK so that students can better appreciate and understand the contribution of mathematics in everyday life.

How to Teach English to Children Early on Hidayana, Rizki Apriva; Yakubu, Usman A.
International Journal of Ethno-Sciences and Education Research Vol. 2 No. 4 (2022): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v2i4.387

Infrastructure and facilities should be sufficient to support the early introduction of English. To properly implement learning management, the teacher, who is a part of the learning process manager, must be aware of the early childhood thinking framework (AUD). Learning should be controlled to produce engaging and fulfilling learning activities. To make learning English for young children meaningful and enjoyable, singing (song) is used as a teaching tool. Children can be engaged in learning English by using a variety of approaches, tactics, games, and learning resources that will make them feel like they are playing rather than learning. Even the local culture can be useful for making learning enjoyable for AUD. The topic of learning English for AUD, in general, and through singing, in particular, will be covered in this article. A positive attitude toward learning English will keep AUD from being disinterested, dissatisfied, or even terrified by it.

Application of Mathematics Learning Methods to Students of SMP N 11 Bengkulu Hidayana, Rizki Apriva; Saputra, Jumadil
International Journal of Ethno-Sciences and Education Research Vol. 3 No. 1 (2023): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v3i1.406

Mathematics is a clear and precise language, quantitative in character, and a method of logical thinking. It significantly impacts the advancement of all branches of science. This study aims to ascertain the instructional strategies used by teachers of SMP N 11 Bengkulu. A descriptive case study was chosen as the research methodology. The participants in this study were three math teachers from SMPN 11 Bengkulu who taught various classes using various teaching resources. Analysis of data using qualitative or non-statistical methods. The lecture and question-and-answer formats were employed to introduce the lesson in light of the findings of the field observations. During the core activities, the question-and-answer, the assignment, the lecture, the discussion, and the demonstration approach are all used. At the end of the lesson, the math teacher employs the lecture technique, question-and-answer method, and assignment method. The assignment and question-and-answer methods are the techniques the teacher uses while evaluating student learning. The technique used in the class results in an average mark that satisfies the academic completeness criteria.

Game Online dan Kesehatan Mental Generasi Z: Studi Kasus pada Remaja Pria di SMK MAN 5 Tasikmalaya Azahra, Astrid Sulistya; Kalfin, Kalfin; Hidayana, Rizki Apriva
International Journal of Ethno-Sciences and Education Research Vol. 4 No. 3 (2024): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v4i3.712

This research investigates the impact of online games on the mental health of Generation Z, with a focus on male adolescents at SMK MAN 5 Tasikmalaya. Quantitative research methods were used to collect data through questionnaires regarding the duration of playing online games and observations of mental health. The results of data analysis show that there is a significant relationship between the duration of playing online games and mental health in male adolescents. It was found that online gaming addiction can result in decreased mental health, including social isolation, decreased academic performance, and emotional disorders. Therefore, efforts need to be made to manage the use of online games wisely to minimize the negative impact on Generation Z's mental health.

Contextual Learning as a Means to Improve Elementary School Students' Mathematical Literacy Skills Hidayana, Rizki Apriva; Lianingsih, Nestia
International Journal of Ethno-Sciences and Education Research Vol. 5 No. 2 (2025): International Journal of Ethno-Sciences and Education Research (IJEER)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijeer.v5i2.935

Mathematical literacy in the Programme for International Student Assessment (PISA) emphasizes students’ ability to analyze, justify, and effectively communicate ideas, as well as to formulate, solve, and interpret mathematical problems across various forms and contexts. The PISA assessment focuses on real-life problems rather than solely on typical classroom-based questions. Based on cognitive development stages, elementary school students are generally in the concrete operational stage, which means they require tangible objects that can be perceived through the senses. Since mathematics learning tends to be abstract, students need support in the form of media and teaching aids to clarify concepts delivered by the teacher, making them easier to understand. Mathematics instruction is expected to provide an integrated, comprehensive, and holistic understanding of the material. This understanding not only fulfills the demands of mathematical content but also offers practical benefits to students. This aligns with the contextual learning approach, which emphasizes active student engagement throughout the learning process, enabling them to discover concepts independently and relate them to real-life situations. Contextual learning is carried out through four main stages: providing motivation, conceptual understanding, application, and assessment—all of which are grounded in the core components of contextual learning.

Empowering High School Students with Software-Based Mathematical Skills for College and Career Readiness Megantara, Tubagus Robbi; Hidayana, Rizki Apriva; Nurkholipah, Nenden Siti; Amelia, Rika; Syarifudin, Abdul Gazir; Mulyo, Lukman Widoyo; Khan, Muhammad Fardeen; Agustin, Nemia
International Journal of Research in Community Services Vol. 6 No. 4 (2025): International Journal of Research in Community Service (IJRCS)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i4.1069

In the current data-driven era, data literacy is a critical competency, yet many high school students lack practical training in essential software like Microsoft Excel, creating a significant skills gap. To address this challenge, the Mathematics Study Program at Universitas Kebangsaan Republik Indonesia conducted a community service program designed to empower high school students with foundational data analysis and visualization skills through a structured, hands-on Excel workshop. The program employed a phased approach, beginning with a socialization session for 31 students, followed by an intensive training workshop for a final cohort of 12 students. The workshop was segmented into three progressive modules: Foundations of Data Management, Logical Analysis and Data Interpretation, and Data Visualization. The program's effectiveness was evaluated using qualitative performance-based assessments and a feedback survey to measure changes in skill and confidence. The results indicate that the training was highly successful, demonstrably improving participants' competence and confidence as evidenced by overwhelmingly positive survey feedback. The foundational and data visualization modules were particularly effective, while the module on logical functions was identified as the most significant challenge for students. This initiative not only succeeded in delivering essential digital skills for college and career readiness but also offered valuable pedagogical insights, confirming the effectiveness of hands-on workshops and highlighting areas for refinement in technical education.

Analyzing Public Perception on Integrating Ride-Hailing with Emergency Health Services Megantara, Tubagus Robbi; Hidayana, Rizki Apriva; Hasanah, Indah Mauludina
International Journal of Business, Economics, and Social Development Vol. 7 No. 1 (2026): International Journal of Business, Economics, and Social Development (IJBESD)
Publisher : Rescollacom (Research Collaborations Community)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijbesd.v7i1.1086

Traditional Emergency Health Services (EHS) face numerous challenges, including response time efficiency. The integration of ride-hailing platforms offers an innovative solution, yet public perception of this concept remains underexplored. This study investigates public perception through a quantitative survey of 100 respondents, analyzed as a whole and as two subgroups: those with prior EHS experience (n=48) and those without (n=52). The results reveal exceptionally strong and broad public support for this integration. A key finding is a significant "experience gap": respondents with prior EHS experience demonstrate confident demand with less hesitation, while non-users show more theoretical support with higher neutrality, particularly regarding personal adoption. Despite this difference, both groups show a high consensus on fundamental requirements such as patient safety, driver competency, and the availability of medical equipment. This study concludes that there is high social viability for integrating ride-hailing and EHS. The findings provide a clear mandate for stakeholders to proceed with innovation, on the condition that system development prioritizes the safety and reliability standards expected by the public. This research lays the groundwork for the next stage: the development of mathematical models for a decision-support system to translate this concept into an effective and trustworthy solution. Keywords: ride-hailing, emergency health services, public perception, mathematical modeling, decision-support systems.

Application of Mathematical Concepts in the Health Sector through Data Analysis Learning Using Microsoft Excel for Senior High School Students at SMA Pasundan Majalaya Syarifudin, Abdul Gazir; Hidayana, Rizki Apriva; Amelia, Rika; Megantara, Tubagus Robby; Kholipah, Nenden Siti Nur; Irmansyah, Athaya Zahrani; Hasanah, Indah Mauludina; Anggraeni, Wulan; Widiawati, Ida; Widayani, Wiwin; Hidayati, Desi; Fajrin, Anita Megawati
International Journal of Research in Community Services Vol. 7 No. 1 (2026): International Journal of Research in Community Service (IJRCS)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v7i1.1165

This community service program aims to strengthen students’ numeracy, digital literacy, and health literacy through the application of mathematical concepts in health data analysis using Microsoft Excel. The activity was conducted at SMA Pasundan Majalaya and involved senior high school students as participants. The program was designed in the form of socialization and hands-on training sessions, including basic arithmetic operations, simple data analysis, logical functions, data visualization techniques, and simple regression analysis applied to health-related data. The implementation employed a participatory learning approach to support students’ understanding and engagement in the learning process. The results indicate an improvement in students’ ability to process, analyze, and interpret health data using Microsoft Excel. This program demonstrates that contextual and application-based mathematics learning can effectively enhance students’ analytical skills and awareness of the role of mathematics in real-world health contexts.

Co-Authors Abdul Gazir Syarifudin Agustin, Nemia Amal, Moh Alfi Amelia, Rika Azahra, Astrid Sulistya Chairunnisa, Nadine Zahra Daulay, Syifa Nur Rasikhah Dewi Ratnasari Fajrin, Anita Megawati Halim, Nurfadhlina Abdul Haq, Fadiah Hasna Nadiatul Harahap, Reivani Putri Berlinda Hasanah, Indah Mauludina Herlina Napitupulu Hidayati, Desi Ibrahim, Riza Andrian Ida Widiawati, Ida Irmansyah, Athaya Zahrani kalfin Kalfin Kalfin, Kalfin Khan, Muhammad Fardeen Kholipah, Nenden Siti Nur Kisti, Vuji Annisa Laksito, Grida Saktian Lianingsih, Nestia Maghfirani, Nazla Aqira Manuela, Angellyca Leoni Megantara, Tubagus Robbi Megantara, Tubagus Robby Meizani, Nicko Mugi Lestari, Mugi Mulyo, Lukman Widoyo Nenden Siti Nurkholipah, Nenden Siti Pirdaus, Dede Irman Riaman Riaman, Riaman Rini Cahyandari Saefullah, Rifki Saputra, Jumadil Sidiq, Fahmi Sukono Sukono Tiswaya, Waway Widayani, Wiwin Wulan Anggraeni, Wulan Yakubu, Usman A. Yoefitri, Tina Yohandoko, Setyo Luthfi Okta Yuningsih, Siti Hadiaty

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