p-Index From 2021 - 2026
7.469
P-Index
This Author published in this journals
All Journal RADIASI: Jurnal Berkala Pendidikan Fisika Autotech: Jurnal Pendidikan Teknik Otomotif Universitas Muhammadiyah Purworejo Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Jurnal Riset dan Kajian Pendidikan Fisika Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Pendidikan Fisika FKIP UM Metro JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI Edufisika: Jurnal Pendidikan Fisika Berkala Ilmiah Pendidikan Fisika Jurnal Pengabdian UntukMu NegeRI SWARNADWIPA: Jurnal Kajian Sejarah, Sosial, Budaya, dan Pembelajarannya JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika) Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pengabdian Pada Masyarakat Batoboh : Jurnal Pengabdian Pada Masyarakat JPF : JURNAL PENDIDIKAN FISIKA COMPTON: Jurnal Ilmiah Pendidikan Fisika Jurnal Pendidikan Fisika dan Teknologi Indonesian Review of Physics (IRiP) Abdi Masyarakat Navigation Physics : Journal of Physics Education ENGLISH FRANCA : Academic Journal of English Language and Education Sinar Sang Surya: Jurnal Pusat Pengabdian kepada Masyarakat Journal Peqguruang: Conference Series Jurnal Penelitian Sains dan Pendidikan (JPSP) TRANSFORMASI : JURNAL PENGABDIAN PADA MASYARAKAT Journal Of Human And Education (JAHE) Penamas: Journal of Community Service Malcom: Indonesian Journal of Machine Learning and Computer Science Fuse-teknik Elektro JURNAL FIRNAS PROSIDING SEMINAR NASIONAL PENELITIAN DAN PENGABDIAN KEPADA MASYARAKAT (SNPPM) UNIVERSITAS MUHAMMADIYAH METRO Lokawati: Jurnal Penelitian Manajemen dan Inovasi Riset JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Madania: Jurnal Kajian Keislaman
Claim Missing Document
Check
Articles

PELATIHAN PEMBUATAN ALAT PERAGA FISIKA VIRTUAL BAGI GURU-GURU MUHAMMADIYAH KOTA METRO Riswanto, Riswanto
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol. 2 No. 3 (2018)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v2i3.117

Abstract

The learning process must be done by a teacher by making careful planning and use of appropriate learning media. Learning media can be a props or other media that provides an element of ease of delivery of learning information. Observation result with IPA / Physics Teacher Forum Muhammadiyah Metro City shows that only 54.5% of physics teachers in Metro city have used the use of visual aids in learning activities. The facts show that not all existing visual aids can represent all the needs of physics subject matter. Therefore implemented training program given to the muhammadiyah teachers in Metro City includes 3 material that is Urgency virtual props in learning Physics, Training of learning media animation learning IPA / Physics Using Macromedia Flash 8 application, and Use of application tracker (Video Based Learning) as a tool in the activities of science / physics lab. The results obtained show that 89% of teachers feel that the materials provided are in accordance with the needs of teachers today. As many as 75% of teachers feel difficulty in using both software. As many as 83% of teachers feel the facilities provided in the training are sufficient, and as many as 86% of teachers have improved their ability to develop virtual props for science / physics subjects. The follow up of this program is the teachers through whatapps social network can ask and discuss in developing learning media using both applications. Outcomes obtained in this devotion is the publication of devotional information in ISSN's devotional journals and mass media through newspapers and online (website). Keywords: The virtual physics props, Muhammadiyah Kota Metro
Exploration of Technology-assisted Summative Assessment Instruments in Differentiation Learning Tri Lestari; Friska Octavia Rosa; Riswanto Riswanto; Dasrieny Pratiwi
Jurnal Penelitian Pendidikan IPA Vol 9 No 10 (2023): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i10.4342

Abstract

This research aims to determine the feasibility, produce a design, and assess the practicality of using IT-based summative assessment in differentiated physics learning. The developed product consists of an IT-based summative assessment in Quizizz for questions and Google Forms for assessment rubrics (poster and video). The research adopts the ADDIE model. The valid user practicality response sheet has an average of 0.93 and a reliability coefficient of 80%. The student practicality response questionnaire results indicate an average of 88.06% with a convenient category. The summative assessment in the form of test items yields an average of 77.77, with 45% of students achieving this score. The summative assessment in the form of a poster yields an average of 82.86, with 35% of students achieving this score. In contrast, the innovative video summative assessment results in an average of 88.75, with 20% of students achieving this score.
Prototype of TDS, EC, Temperature Monitoring System with NodeMCU ESP8266 in Water Quality Prediction Against Variations in Catfish Density BUDIKDAMBER Riswanto Riswanto; Putut Marwoto; Sunyoto Eko Nugroho
COMPTON: Jurnal Ilmiah Pendidikan Fisika Vol 12 No 2 (2026): Compton: Jurnal Ilmiah Pendidikan Fisika
Publisher : Prodi Pendidikan Fisika Universitas Sarjanawiyata Tamansiswa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30738/cjipf.v12i2.21377

Abstract

This study aims to develop and validate an Arduino-based system for monitoring water quality using NodeMCU ESP8266 to measure Total Dissolved Solids (TDS), Electrical Conductivity (EC), and water temperature in fish farming in buckets (Budikdamber). Budikdamber monitoring has never been done in real-time with TDS–EC–temperature at the same time, as well as analyzing the influence of fish density variations on water quality dynamics. ADDIE's development model is used through the stages of analysis, design, development, implementation, and evaluation. The prototype was validated and calibrated with standard instruments, and its accuracy was tested using Pearson, MAE, RMSE, and MAPE correlation. The results showed a high measurement agreement between the prototype and the standard tool, with Pearson correlation values of 0.907 (TDS), 0.973 (EC), and 0.936 (temperature), respectively, signifying the high validity and precision of the measurements. Regression equations result in an effective calibration model to correct measurement bias. water- quality dynamics & density effect to Observations of various fish densities indicate that an increase in the number of fish increases TDS, EC, and pH fluctuations and also affects the thermal characteristics of the water. Regression analysis showed that fish density was a strong predictor of increased TDS (R² = 0.9098) and EC (R² = 0.8988). The study concluded that the prototype is feasible to be used for real-time monitoring and that the ideal density of Budikdamber ranges from 55 to 70 heads per 80-liter bucket to maintain water quality stability. Water management: the safest and optimal time to change pool water is in the afternoon, around 5:30–7:00 PM, with a waiting period of 4-5 days, offering a scalable physics-based monitoring framework for micro-aquaponics systems
Analysis of Laboratory Utilization in Supporting Physics Learning: A Case Study at Metro Public High School 5 Riswanto Riswanto; Wari Prastiti; Friska Octavia Rosa; Dian Utama Hartanto Setya Putra; Febi Afifah; anggun saputri
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 12 No 1 (2026): January-June
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v12i1.6430

Abstract

This study aims to provide a more in-depth analysis of laboratory utilization at SMAN 5 Metro. The research employed a qualitative approach. The object of this study was SMAN 5 Metro, with class XI students and physics teachers as the research subjects. Data were collected through three techniques: observation, interviews, and questionnaires. The data analysis was conducted both during and after the data collection process. The analysis technique used was data triangulation, which involved comparing findings from the three data sources (observations, interviews, and questionnaires). Based on the results of the data analysis, it can be concluded that practicum activities at SMA Negeri 5 Metro are still conducted in the classroom, with teachers bringing practicum tools into the classroom to demonstrate and carry out experiments. In addition, practicum implementation has not been optimal due to improper laboratory utilization, the use of laboratory spaces that do not align with their intended functions, and the absence of laboratory assistants or technicians. These personnel are essential for managing laboratory administration, including maintaining inventory records of tools and materials, handling equipment loans, and organizing tools and materials according to their types and characteristics.
ANALISIS EFEKTIVITAS KELAS UNGGULAN TERHADAP PENGORGANISASIAN PEMBELAJARAN FISIKA DI SMA NEGERI 2 METRO Riswanto; Dedy Hidayatullah Alarifin; Ananda Purnomo; Tia Meylan Anggraeni; Yulia Puspita Dewi; Puja Tria Oktaviani; Velicia Septiana
JURNAL FIRNAS Vol. 5 No. 1 (2024): Volume 5
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jurnal firnas.v5i1.5822

Abstract

Abstract : The purpose of this study is to identify the causes that contribute tophysics learning with the application of superior classes at SMA Negeri 2 Metro,especially in the learning process. The implementation of superior classes is astrategy in education whose purpose is to provide optimal, intensive, and in-deptheducational services to students who have high academic potential. Some of theproblems identified include low understanding of physics concepts, low studentinterest in physics, and low student learning achievement in this subject. In aneffort to address these issues and improve the quality of physics learning, flagshipclasses were introduced as a potential solution. The method used was to collectdata through classroom observations, teacher and student interviews. Thepurpose of this study was to obtain maximum understanding related to the impactof the implementation of the flagship class. The discussion in this study highlightsthe importance of excellent classes as an effective strategy in organizing physicslearning. In the flagship class, students get a more interesting and interactivelearning experience, which helps them understand physics concepts better. Inaddition, good support and motivation from physics teachers are also factors thatplay a role in the effectiveness of superior classes. Based on the research results,the conclusion is that the featured class has high effectiveness in organizingphysics learning at SMA Negeri 2 Metro. Therefore, it is recommended that schoolscontinue to improve and develop excellent classes as an effort to improve thequality of physics learning. Increasing the application of supporting technology inphysics learning can also be a suggestion to optimize the effectiveness of superiorclasses.
PROTOTIPE SMART GUIDANCE STICK TUNANETRA BERBASIS ARDUINO DENGAN SENSOR HC-SR04 SEBAGAI PROJEK DALAM PEMBELAJARAN DIGITAL: Prototype of an Arduino-Based Smart Guidance Stick for the Visually Impaired Using an HC-SR04 Sensor: A Digital Learning Project Riswanto Riswanto; eko prihandono; Arif Hidayat; Wisnu Rifky Alfathir Riswanto
JURNAL FIRNAS Vol. 6 No. 1 (2025): Volume 6
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jurnal firnas.v6i1.8596

Abstract

This study presents the design, development, and evaluation of a Smart Guidance Stick (SGS) that enables visually impaired children to navigate safely while serving as a hands-on digital-learning project for university students. Following the ADDIE R&D framework, researchers analysed user needs, designed an Arduino-based prototype integrating an HC-SR04 ultrasonic sensor, buzzer, lightweight cane body, and battery pack, then built, implemented, and refined the device. Thirty experimental trials conducted with child users in both indoor and outdoor settings produced a mean absolute distance error of 1.13 cm (SD = 0.84 cm) and 80 % detection accuracy for a ≤2 cm error threshold, fulfilling the <3 cm safety margin widely accepted for mobility aids. Although performance trails advanced dual-sensor canes reported in recent literature, SGS offers a low-cost, single-sensor alternative suitable for classroom fabrication. Pedagogically, the project embodies project-based learning principles: students apply coding, electronics, and CAD skills while cultivating empathy and digital literacy through co-design with disabled stakeholders. The hybrid learning mode delivered via the SPADA UM Metro LMS further illustrates inclusive digital education practice. Comparative analysis with prior studies highlights avenues for improvement sensor redundancy, signal-filtering algorithms, GPS or IoT modules, and expanded user experience tests to raise accuracy above 90 % and extend battery life beyond five hours. Overall, SGS demonstrates how affordable assistive technology can enhance blind learners’ autonomy and simultaneously act as a rich instructional object, modelling the integration of engineering design, social responsibility, and accessibility within higher-education curricula
PENGEMBANGAN MODUL AJAR BERBASIS MASALAH DALAM IMPLEMENTASI PEMBELAJARAN BERDIFERENSIASI TERHADAP PENINGKATAN KEMAMPUAN NALAR KRITIS SISWA Reka Diana Permata Sari; Riswanto; Eko Prihandono
JURNAL FIRNAS Vol. 6 No. 1 (2025): Volume 6
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jurnal firnas.v6i1.8692

Abstract

Abstract: The purpose of this research is to determine the feasibility of problem-based teaching modules, to understand the application of problem based teaching modules in differentiated learning, and to measure the improvement in students' critical thinking skills. This research is motivated by several problem factors identified from the results of questionnaire distribution and interviews, namely the still low critical thinking skills, the absence of differentiated learning implementation, and the use of the discovery learning model with the lecture method. The research method used is R&D (Research and Development) with the ADDIE development model, which includes five development stages: analyze, design, development, implementation, and evaluation. Research data were collected using expert validation questionnaires for teaching modules, user response questionnaires for teachers and students, test item validation sheets, and test items. The feasibility of the problem-based teaching module on alternative energy materials is overall categorized as very feasible with a percentage of 91.66%, which consists of expert validation of the teaching module. The implementation of problem-based teaching modules in differentiated learning, as seen from the results obtained through initial assessments or diagnostic assessments, shows three groups of learning styles: the visual group with 9 students achieving a percentage score of 85.55%, the auditory group with 8 students achieving a percentage score of 85.75%, and the kinesthetic group with 8 students achieving a percentage score of 87.25%. Based on the user response questionnaire results from each group—visual, auditory, and kinesthetic—the implementation of differentiated learning was effective and very well conducted in the learning activities. The average percentage scores from both teachers and students were very good, at 86.4% and 86.13%, respectively. The use of problem-based teaching modules can enhance students' critical thinking abilities. This is evidenced by a significant improvement in students' critical thinking test scores, with an N-gain score of 0.81 in the high category.
PENGEMBANGAN E-MODUL BERBASIS PjBL DENGAN PENDEKATAN GAMIFIKASI TERHADAP KEMAMPUAN LITERASI SAINS DAN LITERASIDIGITAL SISWA Fani Febriana; Riswanto; Eko Prihandono
JURNAL FIRNAS Vol. 6 No. 2 (2025): Volume 6
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/jurnal firnas.v6i2.10618

Abstract

The condition of physics learning at Kesuma Bhakti High School shows that student activity still varies, and the use of technology in learning is not yet optimal. In addition, the availability of books at school is actually adequate, but the limitations of the lending system, which only allows use for a certain period of time, means that students cannot always access books at home. This condition has an impact on the suboptimal opportunities for independent learning outside of school. This problem has resulted in low science literacy among students due to the use of textbooks, suboptimal independent learning, difficulties in understanding physics concepts, and limited digital literacy due to the lack of utilization of technology-based devices. However, this condition is also supported by students' interest in physics and their ownership of mobile phones, which can be used as alternative learning media. In addition, students' interest in learning increases when learning is packaged with interactive and fun game elements. Based on these conditions, this study was conducted to assess the feasibility of PjBL-based e-modules with a gamification approach and to determine students' science and digital literacy skills after using the e-modules. The study was conducted using an R&D approach with the ADDIE model. Data were collected through expert validation, science literacy tests, digital literacy questionnaires, and teacher and student response questionnaires. The validation results showed a percentage of 94.5% (very feasible category). The application of the e-module resulted in an increase in science literacy skills with an N-gain of 0.62 (moderate category) and digital literacy of 0.63 (moderate category). In addition, teacher response reached 100% (very good) and student response 79.35% (good). These findings confirm that PjBL-based e-modules with a gamification approach are not only feasible but also capable of addressing physics learning problems related to low science and digital literacy among students.
Pengembangan smart box berbasis digital dengan memanfaatkan arduino uno sebagai sumber belajar fisika Teguh Santoso; Riswanto Riswanto; Nyoto Suseno; Moh. Irma Sukarelawan
Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Vol. 13 No. 2 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/bfi-jifpa.v13i2.22809

Abstract

Pertumbuhan penduduk dan peningkatan kebutuhan konsumsi hidup masyarakat berdampak terhadap tingginya produksi sampah. Kebiasaan masyarakat yang membuang sampah sembarangan dapat berakibat buruk terhadap kesehatan dan lingkungan. Solusi yang dapat diberikan untuk dapat mengatasi masalah ini yaitu dengan memberikan tindakan kuratif dan tindakan preventif. Kotak sampah, kerap menjadi salah satu alasan untuk membuang sampah pada tempatnya. Maka dibutuhkan kotak sampah yang dapat mempermudah dalam membuang sampah. Oleh karena itu, dikembangkan kotak sampah pintar atau smart box berbasis digital dengan memanfaatkan mikrokontroler Arduino uno. Smart box dikembangkan menggunakan sensor HC-SR04. Kotak sampah didesain dengan prinsip kerja kotak sampah dapat terbuka dan menutup secara otomatis ketika seseorang membuang sampah. Selain itu, tujuan pengembangan kotak sampah ini dapat dimanfaatkan sebagai sumber belajar fisika dalam penerapan sensor ultrasonik. Penelitian ini menggunakan metode pengembangan model ADDIE. Hasil penelitian menunjukan bahwa smart box berbasis digital dinyatakan sangat layak dengan persentase kelayakan 89%. Sedangkan dari sisi hasil pemanfaatan sebagai sumber belajar fisika, respon pengguna dari guru dan siswa memiliki persentase sebesar 89% dengan kriteria sangat baik. Development of a digital-based smart box by utilizing Arduino Uno as a physics learning resource. Population growth and increasing consumption needs of people's lives impact high waste production. People's habit of littering can have a negative impact on health and the environment. The solution that can be given to overcome this problem is to provide curative and preventive measures. Trash boxes are often one of the reasons to throw trash in its place. So we need a trash box that can make garbage disposal easier. Therefore, a digital-based smart box or smart box was developed by utilizing the Arduino Uno microcontroller. The smart box was developed using the HC-SR04 sensor. The trash box is designed with the working principle that the trash box can open and close automatically when someone throws out the trash. In addition, the purpose of developing this garbage box can be used as a source of learning physics in the application of ultrasonic sensors. This study uses the ADDIE model development method. The results showed that the digital-based smart box was declared very feasible, with a feasibility percentage of 89%. Meanwhile, regarding the results of utilization as a source of learning physics, user responses from teachers and students have a percentage of 89% with very good criteria.
Implementation of Gamification Based Digital Learning Through Arduino Project Development Using the Addie Instructional Model Riswanto Riswanto; Dedy Hidayatullah Alarifin; Purwiro Harjati
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol. 12 No. 1 (2026): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 12 Issue
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.12104

Abstract

Digital systems courses can be constrained by from low student engagement and limited opportunities hands-on hardware practice. This study contributes a replicable implementation model where ADDIE is operationalized as a student project management cycle (not merely an instructor design model) integrated with PjBL gamification, and evaluated using multi source learning analytics and rubric based prototype assessment. A total of 124 first term students at Universitas Muhammadiyah Metro completed a term long sequence in which they followed ADDIE phases analysis, design, development, implementation and evaluation to create working prototypes addressing real world issues (e.g., Smart Guidance Stick, Flood‑Warning System, AquaFeed). Quantitative descriptive analysis drew on learning management‑system logs, assignment and quiz scores, rubric‑based project evaluations, and mid and end term exam results. Mean participatory‑activity scores were high (M = 88, Coeficient Variation (CV) = 6 %), indicating uniformly strong engagement fostered by point, badges and leaderboards. Project quality was likewise strong (M = 87, CV = 10 %), and showed a positive correlation with participation. Quiz performance was very high (M = 92, CV = 11 %), while midterm and final exam means were 85 (CV = 18 %) and 88 (CV = 10 %), respectively, demonstrating improved cognitive attainment after targeted feed‑forward interventions. Outliers students scoring ≤ 60 on tasks or exams, or producing incomplete projects were identified for diagnostic mentoring. Overall, the approach produced consistently high participation (M=88; CV=6%) and prototype quality (M=87; CV=10%), alongside strong cognitive attainment (midterm M=85; final M=88). The findings describe strong observed performance and identify low-scoring students for diagnostic mentoring; they do not establish causal effectiveness because the study had no control group, pretest, or inferential analysis. The implementation provides a structured model for integrating gamification, ADDIE, and Arduino projects in digital systems instruction.
Co-Authors ., Achyani AA Sudharmawan, AA Achyani Ade Suseno Afifah, Febi Agus Sutanto Ahmad, Andani Aini, Eni Nur Amalia, Dhea Dina Anak Agung Oka Ananda Purnomo Andriani Andriani anggun saputri Angraini, Reka Anjarwati, Sulis Arif Hidayat Arif Hidayat Arif Rahman Aththibby Aritonang, Ridho Asroni Dasrieny Pratiwi, Dasrieny Dedy Hidayatullah Dedy Hidayatullah Al Arifin Dedy Hidayatullah Alarifin Dewi Wulandari Dewi, Novi Ayu Kristiana Dhimas Tribuana Dian Utama Hartanto Setya Putra Eko Prihandono Ernita Sari estika prameswari Fani Febriana Fatmawati, Eka Lia Febi Afifah Febriana, Fani Fitri Ana Sari Friska Octavia Rosa Gunawan, Shodhik Ade Haryanto, Endang Hazriani, Hazriani I Gede Rasagama Iche Widdia Putri Ikhsan, Akhmad Fauzi Intan Sovi Aghnia Qolbi juliana kurniawati, juliana Khoirudin, M. Khoriudin, M Lia Wijaya M. Barkah Salim Maisyarah Maisyarah Maryuning, Maryuning Maya Sari Moh. Irma Sukarelawan Muhammad Massyat, Muhammad Muhfahroyin Muskholifah, Muskholifah Mustika Amalia Nada Hanifah Nur Indah Sari Nurafni Rahayu Khotimah Nyoto Suseno Octavia Rosa, Friska Partono Prastowo, Dedi Catur Puja Tria Oktaviani PUJI LESTARI Purwiro Harjati Putra, Dian hartanto Setya Putri, Rizky Putut Marwoto Rafli Almi Jaya Reka Diana Permata Sari Ridho Aritonang Rizky Saputri, Rizky Rosida, Oknisa Nur Saputri, Anggun Saputri Sari, Fitri Ana Sifa Nurpadillah Siti Nuraini Siti Suptihatin Sodikin Sodikin SRI FATMAWATI Sunyoto Eko Nugroho, Sunyoto Eko Teguh Santoso Teguh Santoso Tia Meylan Anggraeni Tri Lestari Tri Yuliani, Tri Udayati Udayati Untung Surya Dharma Utama Hartanto Setya Putra, Dian Velicia Septiana Wahidah, Nina Ikhwati Wari Prastiti Wari Prastiti, Wari Widiastuti, Monalisa Tri Wisnu Rifky Alfathir Riswanto Wiyanoto, Yudi Wulan Maya Sari Yasmika Baihaqi Yulia Puspita Dewi