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Evaluating the Feasibility of a Flipbook-Based Physics Learning Media Integrated with Local Culture: A Case Study on Matter State Changes Dwi Ayu Nurfaizah; Tien Aminatun; Fitriani Fitriani; Insih Wilujeng; Laifa Rahmawati; Yusman Wiyatmo
AL-ISHLAH: Jurnal Pendidikan Vol 17, No 3 (2025): SEPTEMBER 2025
Publisher : STAI Hubbulwathan Duri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35445/alishlah.v17i3.6604

Abstract

The integration of technology-based learning media with local cultural contexts remains limited in physics education, particularly in teaching abstract concepts such as matter state changes. This study aimed to evaluate the feasibility of an electronic flipbook integrated with local cultural potential and to assess student responses toward its use in physics learning. This research employed a research and development (RD) approach using the 4-D model (define, design, develop, and disseminate), limited to the development stage without classroom implementation. The validation process involved eight expert validators, while student responses were collected from 15 junior high school students. Data were obtained through validation sheets and student response questionnaires, then analyzed descriptively using percentage scores. Validation results indicated that the developed flipbook was highly feasible, with an average score of 90.75% across content, presentation, linguistic, and graphic aspects. Student responses also showed very positive evaluations, with an average score of 93.75%, particularly noting the media’s attractiveness, readability, and contextual integration with local culture. These findings confirm that the electronic flipbook is a valid and feasible medium for physics learning, offering both technological innovation and cultural relevance. The integration of local cultural elements enriched the contextualization of abstract physics concepts, aligning with constructivist learning principles. However, further classroom implementation is needed to evaluate its effectiveness in improving student learning outcomes. The developed flipbook is feasible as a culturally integrated physics learning medium. Future research should focus on large-scale trials to measure its impact on students’ conceptual understanding and motivation.
Effect of the combined application of rhizobacteria and compost on the ability of Pteris vittata L. as a phytoremediator for mercury in gold mine tailing Aminatun, Tien; Budiwati, Budiwati; Suhartini, Suhartini; Raharjo, Rahmanto
Journal of Degraded and Mining Lands Management Vol. 13 No. 1 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.131.9597

Abstract

Artisanal gold mining activities in Indonesia often cause mercury (Hg) pollution, which is toxic and bioaccumulative. Phytoremediation using Pteris vittata L. as a hyperaccumulator and rhizobacteria Pseudomonas aeruginosa RTKP1 is an alternative to overcome this problem. This study aimed to analyze the effect of combined treatment of Pseudomonas aeruginosa RTKP1 induction and compost on the ability of Pteris vittata L. to accumulate Hg in gold mine tailings. The treatment consisted of bacterial induction without compost, and with compost at a tailings:compost ratios of 1:1 and 2:1. This study used descriptive and quantitative analyses. The results showed that Pseudomonas aeruginosa RTKP1 induction without compost resulted in the highest reduction in Hg levels in the tailings, from 10.7 mg/kg to 0.00467 mg/kg with a medium-high BCF value and TF <1, indicating a phytostabilization mechanism. However, the addition of compost reduced the effectiveness of bioaccumulation. Hence, treatment of Pseudomonas aeruginosa RTKP1 without compost was most effective in increasing the ability of Pteris vittata L. to reduce mercury content.
Identification and Mercury Sensitivity Test of Rhizosphere Bacteria From Ageratum conyzoides Plants Growing In Ratatotok Gold Mine, North Sulawesi Rania Nur Farida; Anna Rakhmawati; Tien Aminatun; Sri Atun
Indonesian Journal of Bioscience (IJOBI) Vol. 2 No. 2 (2024): Indonesian Journal of Bioscience (IJOBI)
Publisher : Department of Biology Education FMIPA Universitas Negeri Yogyakarta in collaboration with Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijobi.v2i2.933

Abstract

Indonesia is known for its abundant natural resources, such as gold. However, the mercury-based amalgamation method in illegal gold mining causes environmental pollution. This research explores the potential of utilizing mercury-resistant rhizosphere bacteria from Ageratum conyzoides, a gold hyperaccumulator plant, to develop an effective bioremediation strategy for contaminated gold mining areas. This descriptive-exploratory study aims to identify and determine the sensitivity of mercury in five rhizosphere bacteria isolates from previous research. Bacteria were isolated from the roots of Ageratum conyzoides growing in the Ratatotok gold mining area of North Sulawesi. Bacteria identification was determined using profile-matching methods based on microscopic, macroscopic, physiological, and biochemical features. Similarity Indexes were determined using dendrogram visualization with MVSP software. Mercury sensitivity was analyzed using the cup-plate technique, varying mercury concentrations from 0 ppm to concentrations where clear zones appeared, indicating bacterial growth inhibition. The result indicated that the five isolates were bacteria from the genera Alcaligenes, Pseudomonas, Enterococcus, Streptococcus, and Micrococcus. Notably, Pseudomonas showed the highest potential for mercury resistance, being mercury sensitive at a concentration of 470 ppm, followed by Alcaligenes (110 ppm), Enterococcus (30 ppm), and both Streptococcus and Micrococcus (20 ppm).
The Effect of Trap Crop Kenikir Treatment on Soil Arthropod Population Dynamics in Chili Cultivation Pratiwi, Vicha Rista; Aminatun, Tien
Indonesian Journal of Bioscience (IJOBI) Vol. 3 No. 1 (2025): Indonesian Journal of Bioscience (IJOBI)
Publisher : Department of Biology Education FMIPA Universitas Negeri Yogyakarta in collaboration with Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/ijobi.v3i1.2003

Abstract

This study aims to: (1) find out the soil arthropod family found in red chili (Capsicum annum L.) cultivation with trap crop treatment of walnut plants (Tagetes erecta L.). (2) to determine the effect of trap crop treatment of walnut plants (Tagetes erecta L.) on red chili (Capsicum annum L.) cultivation on soil arthropod population dynamics. Data collection was carried out using the pitfall trap method. The population in this study is all soil arthropods found in red chili plantation areas, then the sample from this study is soil arthropods that are trapped in the pitfall trap. This research took place during August 2021-December 2021 with 5 data collections. The data taken included climatic and edapic data on each observation as well as all types of soil arthropods on red chili plantations. The data obtained were analyzed using descriptive analysis which included the diversity index, equality index, and dominance index. The results of the study showed that 17 families of soil arthropods were obtained. The population dynamics of soil arthropods in red chili cultivation have changed over time by showing ups and downs in yields. Habitat modification with trap crop of kenikir plants as a treatment did not have a significant effect on the population dynamics of soil arthropods in chili cultivation
Analisis Kinerja Mesin Hidrolik Pengepres Sampah Mobile dalam Mendukung Efisiensi Pengelolaan Sampah Terpilah di Bank Sampah, Yogyakarta Widyianto, Agus; Arrozi, Wahyu; Sampurno, Yoga Guntur; -, Paryanto; Widowati, Asri; Aminatun, Tien; -, Sunarta
Jurnal Ilmu Lingkungan Vol 23, No 6 (2025): November 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.6.1527-1537

Abstract

Masalah pengelolaan sampah menjadi tantangan besar di Indonesia, khususnya dalam pengelolaan sampah plastik yang terus meningkat. Sampah plastik seperti botol, galon, dan label plastik membutuhkan ruang penyimpanan besar serta sulit ditangani tanpa teknologi yang efisien. Salah satu solusi inovatif adalah penggunaan mesin hidrolik pengepres sampah mobile, yang dirancang untuk memadatkan sampah terpilah secara signifikan, sehingga mengurangi volume dan beratnya. Penelitian ini bertujuan untuk menganalisis kinerja mesin hidrolik pengepres sampah mobile dalam memadatkan tiga jenis sampah plastik, yaitu botol plastik, galon plastik, dan label plastik, dengan parameter yang diukur meliputi pengurangan volume dan berat sampah. Metode penelitian melibatkan uji coba mesin terhadap ketiga jenis sampah tersebut dalam tiga siklus pengepresan untuk mendapatkan data rata-rata. Parameter yang diukur mencakup volume awal dan akhir, berat awal dan akhir, serta tingkat pengurangan volume dan berat. Data dianalisis secara deskriptif kuantitatif untuk mengevaluasi efisiensi pengepresan. Hasil penelitian menunjukkan bahwa galon plastik memiliki tingkat pengurangan volume tertinggi, yaitu 84%, diikuti oleh botol plastik sebesar 79%, dan label plastik sebesar 66%. Dari segi pengurangan berat, galon plastik juga mencatat hasil tertinggi sebesar 3,2%, sementara botol plastik dan label plastik masing-masing mencatat pengurangan sebesar 0,5% dan 0,8%. Perbedaan hasil ini mencerminkan karakteristik material, di mana sampah berukuran besar dan berongga lebih mudah dipadatkan dibandingkan sampah yang ringan dan fleksibel. Teknologi ini tidak hanya meningkatkan efisiensi pengelolaan sampah dengan menghemat ruang penyimpanan dan biaya transportasi, tetapi juga mendukung proses daur ulang dengan menghasilkan sampah padat berkualitas tinggi. Mesin ini memiliki potensi besar untuk diterapkan di bank sampah dan fasilitas pengelolaan limbah lainnya guna mendukung pengelolaan sampah yang berkelanjutan.
Pelatihan Zotero untuk meningkatkan keterampilan sitasi dan manajemen referensi mahasiswa pendidikan Biologi Tien Aminatun; Mualimin Mualimin; Wenny Pinta Litna Tarigan; Nilahazra Khoirunnisa; Rahmania Pamungkas
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 3 (2025): May
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i3.30204

Abstract

Abstrak Penggunaan referensi yang baik dan benar merupakan salah satu keterampilan penting bagi mahasiswa dalam menyusun karya ilmiah. Namun, masih banyak mahasiswa yang mengalami kesulitan dalam mengelola referensi secara sistematis. Untuk mengatasi hal tersebut, pelatihan Zotero diselenggarakan secara daring oleh Program Studi Pendidikan Biologi, Universitas Negeri Yogyakarta pada bulan Februari 2025. Pelatihan ini diikuti oleh 75 mahasiswa Program Studi Pendidikan Biologi dari Universitas Tidar dan bertujuan untuk membekali mereka dengan keterampilan manajemen referensi yang lebih efisien. Aspek yang diukur dalam pelatihan ini meliputi pemahaman tentang manajemen referensi, kemampuan mengoperasikan Zotero, dan ketepatan dalam menyusun sitasi. Evaluasi program dilakukan dengan memberikan pre-test dan post-test guna mengukur efektivitas pelatihan. Hasil evaluasi menunjukkan peningkatan yang signifikan sebesar 19,6% dalam pemahaman dan keterampilan mahasiswa setelah mengikuti pelatihan. Kata kunci: mahasiswa; manajemen referensi; sitasi; zotero Abstract The proper use of references is one of the essential skills for students in writing academic papers. However, many students still face difficulties in managing references systematically. To address this issue, an online Zotero training was organized by the Biology Education Study Program, Universitas Negeri Yogyakarta, in February 2025. The training was attended by 75 students from the Biology Education Study Program at Universitas Tidar and aimed to equip them with more efficient reference management skills. The aspects assessed during the training included understanding of reference management, proficiency in using Zotero, and accuracy in formatting citations. Program evaluation was conducted by administering a pre-test and post-test to measure the effectiveness of the training. The results showed a significant improvement of 19.6% in students' understanding and skills after participating in the training. Keywords: citation; reference management; students; zotero
Identifying Local Potentials in Lampung Province as a Biology Learning Resource Fitri Nurfatonah; Tien Aminatun
Jurnal Penelitian Pendidikan IPA Vol 11 No 3 (2025): March
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i3.10418

Abstract

The integration of local potential into biology education is essential for enhancing student engagement, creativity, and environmental awareness. However, its implementation remains suboptimal in various regions, including Lampung Province. This study aims to identify and analyze the diversity of bird species in Way Kambas National Park (WKNP) as a potential biology learning resource. Using a descriptive exploratory approach with the point count method, observations were conducted at three locations within WKNP, identifying 33 bird species from 21 families, with a total of 727 individuals. The diversity index values indicate moderate species richness, highlighting the park’s ecological significance. Compared to previous studies, which primarily focused on megafauna, this research emphasizes avian biodiversity as a novel approach to contextual learning. The findings demonstrate that incorporating local avifauna into the curriculum enhances students' understanding of ecosystem dynamics, biodiversity conservation, and species adaptation. This study provides practical implications for biology education by promoting field-based learning, fostering conservation awareness, and encouraging schools to integrate local biodiversity into teaching materials. Strengthening collaboration between educators, conservationists, and local communities is crucial for maximizing the educational benefits of regional biodiversity.
Role of Insect Pests in Minapadi Systems as Natural Feed for Catfish and Their Impact on Pest Control Tien Aminatun; Budiwati; Suhartini; Rizka Apriani Putri; Arsyad Sujangka; Fardan Yusuf Ibrahim; Hasna Kamila Hanum; Genius Abid Karunia; Syfa Trinandita
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 16 No 1 (2026): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.16.1.105

Abstract

Minapadi is a term for the integrated cultivation of rice and fish. This study aimed to: (1) determine the potential of insect pests from the rice field ecosystem as a natural feed source for catfish in a Minapadi system; and (2) analyze the system's effectiveness in naturally controlling insect pest populations in rice. Three experimental plots were established: Plot A combined a rice field with acatfish pond equipped with a light trap; Plot B combined a rice field with a catfish pond without a light trap; and Plot C was a rice field alone, serving as a control. The methodology encompassed land preparation and plot layout, maintenance of rice and catfish, insect sampling, measurement of rice plant growth parameters, assessment of catfish weight and protein content, and statistical data analysis. The potential of insects as feed was indicated by the significant abundance of captured insects, categorized as either pests or natural enemies. Insect abundance across all plots increased weekly during observations. The insect pest diversity index was moderate in the integrated plots (A and B) and low in the control plot (C). The diversity index for natural enemies was moderate acrossall three plots. Statistical analysis revealed that the variation in insect pest abundance and diversity did not significantly influence the protein content levels measured in the catfish. Over all, Minapadi framework demonstrates promise as a component of integrated pest management however supplemental strategies such as light traps may be necessary to enhance control of specific pestpopulations.
Penguatan Kemampuan Menulis Karya Ilmiah Bagi Guru Sekolah Menengah Di Kampung Emas UNY Kota Yogyakarta Setiaji, Bayu; Aminatun, Tien; Rosana, Dadan; Mahmudi, Ali; Pujianto; Fatin, Rahma Nabila; Damayanti, Anastasya
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 10 No. 1 (2026): Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v10i1.89789

Abstract

Workshop penulisan karya ilmiah dilaksanakan untuk meningkatkan kemampuan menulis guru sekolah menengah di Kampung Emas UNY Kota Yogyakarta, khususnya dalam menghasilkan karya tulis yang sesuai kaidah akademik. Kegiatan ini berupa pendampingan penulisan artikel ilmiah yang melibatkan narasumber akademisi dan praktisi pendidikan. Para guru SMP Negeri 12 Yogyakarta mengikuti rangkaian kegiatan, yang mencakup penyampaian materi, diskusi, praktik penyusunan draft, serta evaluasi melalui angket. Hasil angket menunjukkan bahwa pemahaman guru terhadap struktur artikel ilmiah, terutama bagian pendahuluan (57,6% baik) dan hasil penelitian (60,6% baik), berada pada kategori cukup memadai. Namun, bagian metode penelitian masih menjadi kendala utama dengan hanya 45,5% peserta yang menilai pemahamannya baik. Sebagian besar peserta menilai pemaparan narasumber jelas dan mudah dipahami, serta lebih dari 90% menyatakan berkomitmen untuk menerapkan keterampilan menulis dalam menghasilkan karya ilmiah. Temuan ini menunjukkan bahwa workshop efektif dalam meningkatkan literasi akademik guru, meskipun masih diperlukan pendampingan berkelanjutan agar keterampilan menulis dapat berkembang secara konsisten.
Pengenalan Keragaman Vertebrata Endemik Indonesia Serta Metode Pembelajarannya Bagi Siswa dan Guru Sekolah Indonesia Bangkok Putri, Rizka Apriani; Aminatun, Tien; Suhartini
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol. 10 No. 1 (2026): Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v10i1.91452

Abstract

Indonesia merupakan negara dengan kekayaan biodiversitas yang sangat tinggi, termasuk dalam hal fauna, khususnya vertebrata. Berdasarkan hasil audiensi dengan pimpinan sekolah Sekolah Indonesia Bangkok (SIB), diketahui bahwa pembelajaran biologi terutama untuk pengenalan keanekaragaman hayati Indonesia masih terbilang minim. Para guru juga mengalami kesulitan dalam melaksanakan pembelajaran terkait keanekaragaman hayati terutama hewan karena kurangnya dasar keilmuan dan juga pengalaman dalam menjelaskan materi tersebut termasuk mengenai keanekaragaman fauna endemik Indonesia salah satunya kelompok vertebrata. Kegiatan pengabdian masyarakat ini bertujuan untuk memperkenalkan diversitas vertebrata endemik Indonesia kepada siswa dan guru di sekolah, sekaligus memberikan pelatihan metode pembelajaran yang dapat diterapkan dalam pengajaran mengenai konservasi keanekaragaman hayati di lingkungan pendidikan. Melalui kegiatan ini, diharapkan siswa dan guru memperoleh pengetahuan baru tentang vertebrata endemik Indonesia, guru IPA mendapatkan metode pembelajaran yang inovatif untuk diterapkan di sekolah dan pada akhirnya diharapkan dapat menumbuhkan kesadaran akan pentingnya pelestarian vertebrata endemik di kalangan siswa dan guru. Kegiatan ini dilaksanakan pada tanggal 18 Juli 2025 di Sekolah Indonesia Bangkok, dihadiri oleh 18 siswa SD dan SMP serta 7 guru pendamping. Secara umum kegiatan diikuti dengan antusiasme tinggi oleh peserta terutama siswa-siswa SD dan SMP di SIB. Hasil survey menunjukkan bahwa peserta menilai positif kegiatan ini dan menginginkan adanya kegiatan lain yang serupa terutama dalam memperkaya khasanah keilmuan yang berkaitan dengan keanekaragaman hayati dan konservasi. Berdasarkan hasil evaluasi dan diskusi, pelatihan ini telah berhasil dalam (1) memberikan pengayaan ilmu bagi siswa dan guru tentang kenaekaragaman vertebrata endemik Indonesia (2) mendemonstrasikan metode pembelajaran untuk materi keanekaragaman hayati bagi guru dan (3) menumbuhkan kesadaran pelestarian fauna endemik Indonesia bagi siswa dan guru.
Co-Authors - Suyanta - Yuliati -, Paryanto A.A. Ketut Agung Cahyawan W Abdullah Nashih Amin Agung Lesmana Agung Ramadhan Agus Widyianto Aisya, Naafi Ajeng Septiana Putri Aji Suhandy Aji Suhandy Ali Mahmudi Althaaf, Nabila Tsabita Amanina khusna Maulida Amin Khusnadiyah ana arifatul ummahz Andreyani, Anggun Anggraeni, Titis Nindiasari Anisa Setya Hidayah Anna Rakhmawati Arifudin Idrus Arrozi, Wahyu Arsyad Sujangka Asri Widowati Aulia, Fera Azizah Dila Novianti Azizah Dila Novianti Baiki, Khomsa Amar Baso Samsu Rijal Bayu Setiaji Bernadetta Octavia Bog, Kim Jung Budiwati Budiwati Budiwati Budiwati Budiwati Budiwati Budiwati Dadan Rosana Damayanti, Anastasya Daryono, Rihab Wit Daud Dakabesi David Meilana Nur Arifin Diah Tirta Puri Djuwanto Djuwanto Dwi Astuti Dwi Ayu Nurfaizah Dwi Novita, Ria Dwiana Muflihah Yulianti Dwiki Prasetiya Prayudi Edhi Martono Edhi Martono Ema Imtihana Endah Ratna Sari Fardan Yusuf Ibrahim Farida Hanum Fatin, Rahma Nabila Feliksitas Angel Masing Fitra Purnama Agung Fitri Nurfatonah Fitri Rahmawati Fitri Rahmawati Fitriani Fitriani Galuh Danang Sumari gendra devi putra achir Genius Abid Karunia Hasna Kamila Hanum Heru Kuswanto I Gusti Putu Suryadarma, I Gusti Putu Ibrahim, Fardan Yusuf Indah Kristiani Siringo Ringo Insih Wilujeng Ishadiyanto Salim Junita Kurniawati Kiswandini, Dina Ayu Kun Sri Budiasih Kurnia Cahyani Kusumawardani, Wening Kuswarsantyo Laifa Rahmawati Lili Sugiyarto Lukman Ari Bahrtiar Marfuatun . Mualimin Mualimin muhammad irfan Muhammad Rasyid, Muhammad Mutia Ulfah Naafi Aisya Nilahazra Khoirunnisa Nrangwesthi Widyaningrum Nugroho Susetya Nugroho Susetya Putra Nur Rizki Putri Ramadhanti Nurul Endah Rahmawati1 Paramita Cahyaningrum Kuswandi Paryanto Pertiwi, Melania Citra Ponty S.P. Hutama Pratiwi, Vicha Rista Pratomo, Ibnu Pujianto Raharjo, Rahmanto Rahmania Pamungkas Ramadhanti, Nur Rizki Putri Rangpan, Vichit Rania Nur Farida Ratnawati Ratnawati Regina Tutik Padmaningrum Reginaldis Isabella Sado REZA FAHLEVI Reza Fahlevi Rizka Apriani Putri Rizky Diah Aryani Rizky Diah Aryani Roin Fathul Arzaqi S. Djalal Tanjung S. Djalal Tanjung, S. Djalal Sabar Nurohman Sanudin Sanudin Sari, Tutik Utika satrio haryo pamungkas Setyo Sulistyono Simbolon, Doly Siti Ainun Jariah Siti Umniyatie Siwi Indarti Slamet Suyanto SRI ATUN Sri Harti Widyastuti Sudarsono Sudarsono Sugma Suhartini Suhartini Suhartini Suhartini Suhartini Sujangka, Arsyad Sulistiyawati Sulistiyawati Sunarta Sunarta - Suratman Woro Suratman Woro Suratsih Suratsih Syfa Trinandita Tarigan, Wenny Pinta Litna Triatmanto Triatmanto Tutiek Rahayu Tutiek Rahayu Unayah, Habibatul Utami, Yanika Cahya Victoria Henuhili Victoria Henuhili Wibowo, Yuni Yanuarief, Cecilia Yoga Guntur Sampurno yoyon arifta Yuliati Yulianti Yuliati Yuliati Yuni Prastiwi Mutiarani Yuni Wibowo Yuni Wibowo Yusman Wiyatmo Zaenuddin Hudi Prasojo