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All Journal International Journal of Public Health Science (IJPHS) International Journal of Advances in Applied Sciences MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Torani Journal of Fisheries and Marine Science TRANSIENT: Jurnal Ilmiah Teknik Elektro Jurnal Sains dan Teknologi Jurnal Kesehatan Masyarakat Journal of Environmental Engineering and Sustainable Technology Jurnal Sumberdaya Alam dan Lingkungan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Teras Jurnal Civil Engineering Journal Chemistry Indonesian Journal of Chemical Research International Journal of Community Service Learning International Journal of Natural Science and Engineering Jurnal Kreativitas PKM Ekuilibrium : Jurnal Ilmiah Bidang Ilmu Ekonomi Jurnal Sosial Ekonomi Kelautan dan Perikanan Indonesian Journal of Social and Environmental Issues (IJSEI) International Journal of Applied Technology Research Jurnal Pendidikan dan Teknologi Indonesia Jurnal Wawasan Pendidikan International Journal of Qualitative Research Jurnal Teknologi Lingkungan Lahan Basah Environmental Engineering Journal ITATS Journal of Sustainable Infrastructure Jurnal Pengabdian Masyarakat Composite: Journal of Civil Engineering Journal of Environment and Sustainability Education Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Kesehatan Masyarakat Indonesian Journal on Learning and Advanced Education (IJOLAE) Jurnal Ilmu Teknik Sipil Indonesia (JITESNA)
Prayogo, Wisnu
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Linking the Tourism Activity to the Occurrence and Distribution of Microplastics Chairunnisa, Nadda Khalila; Adam, Moh. Awaludin; Kristianto, Sonny; Aidil Candri, Dining; Shofi Talbia, Husna; Aprilia, Maya; Mutia, Tuti; Masruroh, Heni; Iswara, Aditya Prana; Prayogo, Wisnu
Civil Engineering Journal Vol. 11 No. 7 (2025): July
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-07-010

Abstract

Tourism-driven activities have increasingly contributed to marine microplastic (MPs) pollution, particularly in island ecosystems. This study assesses the abundance, characteristics, and spatial distribution of MPs in Gili Trawangan, Indonesia, by analyzing samples from coastal water, sediments, and fish across three zones: a seaport, recreational beach, and mangrove area. Standardized filtration, density separation, and FTIR spectroscopy were used to identify MPs types and polymers. Results show the highest MPs concentrations in coastal water at recreational beaches (19.25 particles/L), sediment at seaports (23.15 particles/kg), and fish near seaports (17.5 particles/individual), indicating elevated risks of bioaccumulation. Fragments and fibers were the dominant forms, with prevalent polymers including PS, PE, and LDPE, mostly in black, blue, and red colors. The mangrove area exhibited lower MPs levels due to its natural filtration capacity but still showed MPs presence in biota. This multi-compartment approach highlights a clear link between tourism intensity and MPs contamination. The findings provide new insights for designing localized interventions, including waste reduction strategies and regulatory measures. By integrating ecological and anthropogenic factors, this study supports the development of sustainable tourism policies to mitigate MPs pollution and protect coastal biodiversity.
Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste Imran, Al Ichlas; Siregar, Januar Parlaungan; Cionita, Tezara; Fitriyana, Deni Fajar; Anis, Samsudin; Dewi, Rozanna; Junaedi, Thomas; Wijayanto, Etanto Heiliano; Prayogo, Wisnu
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.2041

Abstract

The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highest flexural strength was 30.46 MPa (CR10), and the highest hardness was 75.9 HRC (CR15), indicating superior performance for CR fillers. The observations of the fracture surface showed that increasing the fraction of wood dust contributed to lowering the mechanical performance due to the relatively large distribution of voids and agglomeration. This finding confirms the importance of filler type and fraction selection on composite performance. Future research is recommended to explore filler surface modification and hybrid combinations to improve dispersion and bonding between phases in composites.
Dissolved organic matter released from paper trash in water during ultraviolet irradiation: impacts on trihalomethane formation Prijanto, Teguh Budi; Hasan, Nia Yuniarti; Kahar, Kahar; Qadafi, Muammar; Prayogo, Wisnu
International Journal of Advances in Applied Sciences Vol 14, No 3: September 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i3.pp869-877

Abstract

When exposed to ultraviolet (UV) light, paper trash could release dissolved organic matter (DOM) as a disinfection byproduct (DBP) precursor in water. This study was undertaken to assess the regulated DBPs, trihalomethanes-4 (THM4) generation potential, and estimated cytotoxicity of paper trash soaked in water during UV radiation. The UV irradiation was carried out at 1, 6, 12, 24, and 48 hours. The released organic material was determined using ultraviolet-visible (UV-Vis) adsorption at wavelengths ranging from 200 to 700 nm. Chlorination was carried out for 24 hours to determine THM4 formation potentials. According to the research findings, the longer the radiation period, the more THM4 species are formed in plain paper samples. On the other hand, the production of trichloromethane (TCM) on paper samples containing writing decreased as the UV radiation period increased. THM4 levels reached 103.12 and 150.57 µg/L for plain and writing paper samples, respectively. UV absorbance at 272 nm (A272) shows a 92% association with THM4 production, making it suitable as an initial characterization approach. Paper trash pollution in water could form carcinogenic DBPs, THM4, if used as a water source in a water treatment plant using chlorine disinfection.
Community Participation in Urban Sanitation Programs at Koja, Jakarta, Indonesia Aji, Angga Dheta Shirajjudin; Suhardono, Sapta; Sofiyah, Evi Siti; Ridhosari, Betanti; Nastiti, Almira Davina; Prayogo, Wisnu; Suryawan, I Wayan Koko
Jurnal Kesehatan Masyarakat Vol. 20 No. 3 (2025)
Publisher : Universitas Negeri Semarang in collaboration with Ikatan Ahli Kesehatan Masyarakat Indonesia (IAKMI Tingkat Pusat) and Jejaring Nasional Pendidikan Kesehatan (JNPK)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kemas.v20i3.1990

Abstract

Urban sanitation remains a critical public health issue, with community participation recognized as a key factor in the success of sanitation programs. This study aims to explore the multi-dimensional factors influencing community participation in the urban setting of Koja. Through a mixed-methods approach, including surveys, interviews, and observational studies, we investigated how socio-demographic factors such as age, gender, income, and occupation, as well as aspects of sanitation governance, infrastructure, and educational interventions, interplay to affect community engagement. The study revealed that while infrastructure and access are crucial, socio-economic and gender-related barriers significantly impact participation levels. Educational level emerged as a strong predictor of engagement, indicating that awareness and knowledge play a critical role in motivating community involvement. Furthermore, sanitation governance and the quality of policies and monitoring were found to be instrumental in shaping public attitudes towards participation. The research highlights the necessity for integrated and inclusive sanitation policies that address the local context and socio-economic diversity of urban populations. The findings underscore the importance of targeted educational campaigns and the fostering of collaborative community relationships to enhance participation in sanitation programs. This study contributes to the discourse on urban sanitation by providing a nuanced understanding of the complex factors at play in community-based sanitation efforts, offering insights for policymakers to improve public health outcomes.
Comprehensive Evaluation of Drainage Channels Along Selected Roads in Medan City, North Sumatra Pasaribu, Hugo S. V.; Sakinah, Nur; Marbun, Hanna Swesy; Mulyana, Rachmat; Alvan, Syahreza; Panjaitan, Nahesson; Khairuni, Zhili Izzadati; Ikhwal, M. Faisi; Prayogo, Wisnu
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 1 (2023): April
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i1.52487

Abstract

Pertumbuhan penduduk telah menyebabkan peningkatan debit limpasan hujan dan air limbah yang dialirkan ke saluran drainase. Penelitian ini maka bertujuan mengevaluasi volume drainase di Jalan Taud, Kota Medan, apakah tetap dapat menampung air buangan hingga perkiraan 50 tahun mendatang. Saluran yang diamati mulai dari Rumah Kosan (Jalan Taud No. 112) hingga unit usaha Gulo Pangkas (Jalan Taud No. 16) dengan panjang 1.000 m. Evaluasi ini mempertimbangkan pertambahan jumlah penduduk, debit air limbah domestik, debit limpasan hujan, timbulan sedimen, serta proses evapotranspirasi sebagai bagian dari siklus air. Berdasarkan investigasi, diketahui volume drainase di Jalan Taud saat ini masih dapat melayani masyarakat hingga tahun 2047. Hasil evaluasi yang dilakukan pada saluran drainase terpilih di Jalan Taud, Kota Medan, diperoleh kesimpulan bahwa drainase tetap dapat menampung air buangan dari campuran limpasan hujan dan air limbah domestik hingga 25 tahun mendatang. Intensitas curah hujan pada 10 tahun mendatang di tahun 2032 berkisar 5,87 mm/jam, 6,04 mm/jam di tahun 2047, dan 6,56 mm/jam di tahun 2072; sedangkan debit air limbah total yang dihasilkan dari aktivitas domestik adalah 10.71 x 10-2 L/orang/hari (2032), 12.24 x 10-2 L/orang/hari (2047), dan 17.24 x 10-2 L/orang/hari (2072). Dengan panjang saluran yang diamati 1.000 m, lebar saluran rata-rata adalah 0,82 m, dan kedalaman 0,90 m, didapatkan volume drainase eksisting adalah 590,4 m³. Perlu upaya pengelolaan rutin seperti pembersihan saluran dari sampah dan sedimen secara berkala, serta sosialisasi kepada masyarakat untuk menjadikan drainase tetap berfungsi sebagaimana mestinya.
Nature-Based Solutions in Urban Landscapes: Determinants Influencing Willingness to Participate in Composting in Metropolitan Jakarta, Indonesia Mulyana, Rachmat; Suryawan, I Wayan Koko; Ulhasanah, Nova; Septiariva, Iva Yenis; Prayogo, Wisnu; Suhardono, Sapta; Sari, Mega Mutiara; Arifianingsih, Nur Novilina; Buana, Dwinto Martri Aji
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 3 (2024): 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.14.3.451

Abstract

Amidst the rapid urbanization of Jakarta, the adoption of Nature-based Solutions (NbS) like composting offers a sustainable pathway for waste management and environmental rejuvenation. This research endeavors to discern the critical factors impacting the willingness of Jakarta's metropolitan populace to participate in composting activities. The study identified key determinants through a comprehensive analysis, including the availability of composting facilities, the expertise of trained cadres, the adoption of advanced composting technologies, and routine field monitoring. Furthermore, demographic nuances, specifically marital status, and age, surfaced as influential parameters. Singles and the younger age bracket (20-29 years) exhibited distinct attitudes towards composting, hinting at underlying generational and lifestyle-based disparities. The findings provide a foundation for tailoring policies and interventions that cater to Jakarta's unique urban fabric, promoting a more inclusive and influential composting culture.
Development of Soil & Water Assessment Tool Application In Krueng Aceh Watershed Review Ikhwali, M Faisi; Ersa, Nanda Savira; Khairi, Alfin; Prayogo, Wisnu; Wesli, Wesli
Teras Jurnal : Jurnal Teknik Sipil Vol. 12 No. 1 (2022): Volume 12 Nomor 1, Maret 2022
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v12i1.703

Abstract

Abstract The problem of the water availability has become a global issue so that it needs a tool for water management such as the Soil and Water Assessment Tool (SWAT). This study aims to measure how far the uses and developments of the SWAT model in the Krueng Aceh watershed. This paper reviewed applications of SWAT Model in Krueng Aceh Watershed. The developments data were obtained from five publications. This study has limitations in assessing the performance of the SWAT developed in the Krueng Aceh watershed/sub-watershed because not all publications report on the calibration or validation process. From the search results, there is one modeling application that performs the calibration process with statistical parameters on a daily scale and the other three papers on monthly data. The availability of observation data has not had a long time series makes researchers face limitations in improving the model performances. Keywords: SWAT, Hydrological Model, Water, Soil  Abstrak Masalah ketersediaan air telah menjadi isu global sehingga diperlukan suatu alat untuk pengelolaan air seperti Soil and Water Assessment Tool (SWAT). Penelitian ini bertujuan untuk mengukur sejauh mana pemanfaatan dan perkembangan model SWAT di DAS Krueng Aceh. Artikel ini mengulas penerapan Model SWAT di DAS Krueng Aceh. Data perkembangan diperoleh dari lima publikasi mengenai Model SWAT. Kajian ini memiliki keterbatasan dalam menilai kinerja SWAT yang dikembangkan di DAS/sub-DAS Krueng Aceh karena tidak semua publikasi melaporkan proses kalibrasi atau validasi. Dari hasil pencarian, terdapat satu aplikasi pemodelan yang melakukan proses kalibrasi dengan parameter statistik pada skala harian dan tiga aplikasi lainnya pada data bulanan. Ketersediaan data lapangan yang belum memiliki data time series yang panjang membuat peneliti menghadapi keterbatasan dalam meningkatkan perfoma model. Kata Kunci: SWAT, Model Hidrologi, Air, Tanah
Impacts of Sanitation Practices on Human Development: A Decade-Long Analysis of the Malang District Aji, Angga Dheta Shirajjudin; Suhardono, Sapta; Suryawan, I Wayan Koko; Prayogo, Wisnu
EKUILIBRIUM : JURNAL ILMIAH BIDANG ILMU EKONOMI Vol 19 No 2 (2024): September
Publisher : Universitas Muhammadiyah Ponorogo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24269/ekuilibrium.v19i2.2024.pp276-288

Abstract

This study explores the influence of various sanitation practices on the Human Development Index (HDI) in the Malang District from 2011 to 2020. Employing a multiple linear regression analysis, the research examines the relationship between the HDI and five critical sanitation practices: access to wastewater treatment plants, open defecation prevalence, septic tank usage, and direct waste disposal into water bodies and onto land. Secondary data was sourced from the Badan Pusat Statistika of Malang District, ensuring robust and authoritative information spanning over a decade. Preliminary diagnostics were performed to affirm the data's suitability for regression analysis. The results indicated a significant negative impact of direct disposal into water bodies on HDI, emphasizing the critical role of effective waste management practices in promoting human development. The study underscores the need for integrated policy approaches that address sanitation infrastructure improvements, environmental protection, and education on public health practices. This paper contributes to the literature by quantifying the effects of sanitation on human development over an extended period. It offers evidence-based recommendations for policymakers to support sustainable development goals in the region.
Kajian literatur identifikasi dan pemahaman tentang kontaminasi mikroplastik di biosfer Ratnaningsih, Wahyu; Prayogo, Wisnu; Saputra, Andri; Shabrina, Husna Muizzati
Torani Journal of Fisheries and Marine Science Vol. 9 No. 1 (2025): VOLUME 9, NOMOR 1, DECEMBER 2025
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35911/torani.v9i1.46625

Abstract

Microplastics are plastic particles with a size less than 5 mm which pose a growing concern in terms of ecotoxicology in aquatic environments and human health. Despite the widespread presence of microplastic pollution in land, water, and air, these environments are often viewed in isolation, although they are intricately interconnected. This study endeavors to examine the existing scientific literature pertaining to microplastic research across various environmental compartments and identify research gaps to shape future priorities. Scientific papers addressing microplastic pollution, published between 2014 and 2023, have been identified in the Web of Science database. Original research articles categorized under Environmental Sciences, Marine/Freshwater Biology, Toxicology, Multidisciplinary Sciences, Environmental Studies, Oceanography, Limnology, and Ecology in the Web of Science are chosen for a detailed investigation into microplastic research in seas, estuaries, rivers, lakes, soil, and the atmosphere. The selected papers for seas, estuaries, rivers, and lakes are further categorized based on (i) occurrence and characterization, (ii) uptake by and effects on organisms, and (iii) issues related to fate and transport. The findings indicate that, despite significant scientific research on marine microplastics, our understanding of the extent of microplastic pollution in continental environments, including rivers, lakes, soil, and air, as well as the associated environmental interactions, remains limited.
Mandailing smoked fish cuisine: cultural, nutritional, and local wisdom insights Emilia, Esi; Haryana, Nila Reswari; Rosmiati, Risti; Mutiara, Erli; Fitria, Laili; Mulyana, Rachmat; Prayogo, Wisnu
International Journal of Advances in Applied Sciences Vol 14, No 4: December 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i4.pp1166-1180

Abstract

This study explores the uniqueness of Mandailing traditional cuisine, focusing on the cultural and nutritional significance of its iconic smoked fish dishes, such as smoked fish rendang, smoked fish curry, smoked fish with chili sauce, and smoked fish with vegetables. These dishes showcase the traditional fish smoking practices developed as a preservation method, allowing the Mandailing community to adapt to the abundance of rivers and natural resources in their highland environment. Smoking fish not only extended its shelf life but also became a cornerstone of Mandailing culinary identity, reflecting the community’s ingenuity and resourcefulness. Mandailing cuisine is deeply influenced by neighboring culinary traditions from West Sumatra and North Tapanuli, resulting in a rich fusion of bold flavors, often characterized using coconut milk and fresh spices. The preparation of smoked fish combines traditional high-heat cooking techniques with unique flavor profiles that distinguish Mandailing dishes from other Indonesian cuisines. This research highlights the importance of Mandailing smoked fish practices in sustaining local food systems and preserving cultural heritage. By emphasizing both cultural and nutritional aspects, it underlines the relevance of these traditional practices in promoting food diversity, environmental sustainability, and the recognition of Indonesia’s rich culinary landscape.
Co-Authors Abda Abda Abdillah, Kurniawan Adi Susilo Aditya Prana Iswara Adri Firmansyah Aidil Candri, Dining Akmal, Ajmir Alexander Tunggul Sutanhaji Alfarishi, Bilal Aliyda, Fifi Alvan, Syahreza Andri Saputra Anggamulia, Muh. Ilham Ani Purwanti Aningtyas, Vebri Aprilia, Maya Arbintarso, Ellyawan Setyo Arwieny Hanami, Zarah Atika, Liana Aulia Annas Mufti Azahar, Ridho Azizah, Rifka Noor Bambang Winardi Buana, Dwinto Martri Aji Bukhary, Muhammad Al Cahya Alam, Firdha Chairina Zulfiani, Putri Chairunnisa, Nadda Khalila Cionita, Tezara Darwin Darwin Daudsyah Imami, Ahmad Daulay, Ilmi Alfiah Depri Dhifaf Athiyah Zhabiyan dian febrianti Dion Dion Awfa Emilia, Esi Erli Mutiara Ernindah Sormin Ersa, Nanda Safira Ersa, Nanda Savira Estim, Abentin Fajriharish Nur Awan, Fajriharish Nur Farizal, Teuku Fatahillah, Al Fiaqi Hamada, Ichi Fitria, Laili Fitriyana, Deni Fajar Ginting, Lioni Gabby Ella Br Gulo, Kanisius Delvin S Gultom, Tiara Gustinasari, Kiki Handana, Hindra Karamah Putra Harahap, Rumilla Harahap, Rumillah Hardoko Hardoko Hariyanto, Valentinus Lilik Harry Wibowo Haryana, Nila Reswari HASAN, NIA YUNIARTI Herdianti, Wenny Heri Gustami Hilman, Zaki Husaini, Muhammad Zakki I Wayan Koko Ihsan, Muhammad Faris Ikhwal, M. Faisi Ilham Nofri Yandra Imami, Ahmad Daudsyah Imelda Masni Juniaty Sianipar Imran, Al Ichlas Istiqomah Shariati Zamani Jamaluddin Jamaluddin Jaya, Ardino Wira Junaedi, Thomas Kahar Kahar, Kahar Kamal, Mushthofa Karina, Aisyah Makafta Kevin Maghrival Khairi, Alfin Khairuni, Zhili Izzadati Kristianto, Sonny Langgeng Setyono, Langgeng Luchmanandri, Rahmadini Lukman, Mena Fadillia M. Faisi Ikhwali M. Habib Algifari Mahadewi, Catherine Honey Marbun, Hanna Swesy Masruroh, Heni Maulida, Fatimah Mawaddah, Nurul Meisya Ruth, Gabriella Meisya Ruth Meylis Safriani Moh. Awaludin Adam Muchlis Muchlis Muhammad Amin Mujaroh Khotimah, Mujaroh Muklis Muklis Mustaqiman, Aulia Nur Nahesson Hotmarama Panjaitan Najmuddin MA, Najmuddin Najwa, Wardatun Napitu, Oktavianus Nastiti, Almira Davina Nasution, Muhammad Khairul Ikhsan Novrianty, Irma Nur Novilina Arifianingsih Nur Sakinah Nur, Aulia Mustaqiman Nurul Aulia Larasati Pangestu, Muhammad Puri Dwi Pasaribu, Hugo S. V. Prasetyo, Zulham Purnawan Purnawan Puspita, Rika Dona Putra, Riansyah Qadafi, Muammar Rachmat Mulyana Rahmadani, Sarra Rasyid, Galih Al Ratnaningsih, Wahyu Ridhosari, Betanti Rifka Noor Risti Rosmiati Rozanna Dewi Sahid Samsudin Anis Sari, Mega Mutiara Sarwa, Sarwa Septiariva, Iva Yenis Shabrina, Husna Muizzati Shofi Talbia, Husna Sidabutar, Daniel Mario Sihole, Arjuna Silaban, Gari Daniel Simanjuntak, Rizky Simanullang, Lillis Simaremare, Yessika Angelina Sinaga, Tiur Sari Tua Siregar, Januar Parlaungan Sitompul, Astrid Sitorus, Heri Franata Sofiyah, Evi Siti Sri Rahayu Gusmarwani, Sri Rahayu Sri Sunarsih Sugianto Prabowo Rahardjo, Seto Suhardono, Sapta Suparni Setyowati Rahayu Suryawan, I Wayan Koko Teguh Budi Prijanto, Teguh Budi Tia Dwi Irawandani Tinov, Naufal Tio Katarina Marpaung Trimailuzi Trimailuzi, Trimailuzi Tuti Mutia Ulhasanah, Nova Ulya Bunga, Venny Uma Fadzilia Arifin, Uma Fadzilia Wesli Wesli Widiatama, Angga Jati Wijayanto, Etanto Heiliano Yasa Palaguna Umar, Yasa Palaguna Yuni Yolanda Yusrizal, Teuku Zakia Zakia Zhilli Izzadati Khairuni Zubir, Moondra Zurfi, Alfian