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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) REKA RACANA BIOTROPIA - The Southeast Asian Journal of Tropical Biology Pixel : Jurnal Ilmiah Komputer Grafis Tadris: Jurnal keguruan dan Ilmu Tarbiyah Hunafa: Jurnal Studia Islamika Jurnal Pranata Hukum Jurnal Transportasi Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Al-Ahkam Jurnal Pendidikan Fisika Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil JOIV : International Journal on Informatics Visualization Jurnal Ilmiah Peuradeun Potensi : Jurnal Sipil Politeknik SPEKTRA: Jurnal Kajian Pendidikan Sains Sumatra Journal of Disaster, Geography and Geography Education Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmiah Didaktika : Media Ilmiah Pendidikan dan Pengajaran JURNAL ILMIAH INFORMATIKA PEDAGOGIK : JURNAL PENDIDIKAN IRJE (Indonesian Research Journal in Education) Batoboh : Jurnal Pengabdian Pada Masyarakat SEIKO : Journal of Management & Business JMKSP (Jurnal Manajemen, Kepemimpinan, dan Supervisi Pendidikan) Jurnal Kolaboratif Sains NUSANTARA : Jurnal Ilmu Pengetahuan Sosial JURNAL PENDIDIKAN TAMBUSAI Jurnal Basicedu Journal of Education Technology Mimbar Ilmu Aulad : Journal on Early Childhood International Journal of Educational Dynamics (IJEDS) JURTEKSI JURIS (Jurnal Ilmiah Syariah) Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya JTP - Jurnal Teknologi Pendidikan Pagaruyuang Law Journal Kasuari: Physics Education Journal (KPEJ) DIDAKTIKA : Jurnal Kependidikan International Journal for Educational and Vocational Studies JRTI (Jurnal Riset Tindakan Indonesia) Adaara: Jurnal Manajemen Pendidikan Islam JURNAL LENTERA BISNIS KOLOKIUM: Jurnal Pendidikan Luar Sekolah Jurnal Optimalisasi Jurnal Bisnis Dan Kajian Strategi Manajemen Ekombis: Jurnal Fakultas Ekonomi Performance : Jurnal Bisnis dan Akuntansi Akbis: Media Riset Akuntansi dan Bisnis Silampari Jurnal Pendidikan Ilmu Fisika JATI (Jurnal Mahasiswa Teknik Informatika) PEDAGOGIKA Indonesian Journal of Electrical Engineering and Computer Science Public Corner SOSIOEDUKASI : JURNAL ILMIAH ILMU PENDIDIKAN DAN SOSIAL Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Bidayah: Studi Ilmu-Ilmu Keislaman wacana equiliberium (jurnal pemikiran penelitian ekonomi) Jurnal Paedagogy Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat JURNAL PENDIDIKAN, SAINS DAN TEKNOLOGI Teknomekanik Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jurnal Pengabdian Masyarakat Asia Indomera : Jurnal Magister Manajemen Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Tarikhuna: Journal of History and History Education Jurnal Pengabdian kepada Masyarakat Continuous Education : Journal of Science and Research Journal of Applied Sciences, Management and Engineering Technology (JASMET) Journal of Educational Administration and Leadership (JEAL) Jurnal Ilmiah Teunuleh: The International Journal of Social Sciences Jurnal Pengabdian Masyarakat (ABDIRA) Journal of Information System and Technology (JOINT) International Journal of Educational Review, Law And Social Sciences (IJERLAS) Journal of Educational Management and Instruction (JEMIn) Kontribusi: Jurnal Penelitian dan Pengabdian Kepada Masyarakat International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Jurnal Esensi Infokom: Jurnal Esensi Sistem Informasi dan Sistem Komputer eScience Humanity Journal International Journal of Humanities Education and Social Sciences Jurnal Family Education Jurnal Vokasi Mekanika Jurnal Ekonomi, Manajemen, Bisnis dan Akuntansi (JEMBA) Sinomika Journal: Publikasi Ilmiah Bidang Ekonomi dan Akuntansi Journal of Innovation Research and Knowledge BISMA Cendekia Journal of Educational Sciences PERADABAN JOURNAL of ECONOMIC and BUSINESS Devotion: Journal Corner of Community Service Journal Cerdas Mahasiswa Technologica PENA LAW: International Journal of Law Jurnal Basicedu Indonesian Journal of Community Empowerment YASIN: Jurnal Pendidikan dan Sosial Budaya ARZUSIN: Jurnal Manajemen dan Pendidikan Dasar JoEELE JURNAL PENGABDIAN AGRO AND MARINE INDUSTRY Jurnal Kesehatan Samawa Cerdika: Jurnal Ilmiah Indonesia Journal of Public and Business Accounting Jurnal Pengabdian Masyarakat Dharma Andalas Regress: Journal of Economics & Management Journal of Engineering Researcher and Lecturer Seminar Nasional Hasil Penelitian LP2M UNM TOFEDU: The Future of Education Journal Jurnal Pendidikan Sosial dan Konseling Jeinsa : Jurnal Ekonomi Ichsan Sidenreng Rappang Triwikrama: Jurnal Ilmu Sosial Journal of Contemporary Local Politics International Journal of Education Research and Development Jurnal Riset Kajian Teknologi dan Lingkungan Journal of Social Work and Science Education Society Greenation International Journal of Law and Social Sciences Joong-Ki Jurnal Pendidikan MIPA Tafani Journal of Green Science and Technology Cermat : Jurnal Cendekiawan dan Riset Multidisiplin Akademik Terintegrasi Journal of Management Branding Jurnal Riset dan Pengabdian Interdisipliner KOMPUTASI Jurnal Jejak Hukum Indonesia (JHI) Jurnal Kajian Ekonomi dan Perbankan Syariah Jurnal Nispatti
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Journal : Teknomekanik

Design of Catamaran Ship Using Solar Power Ramadhan, Ozi; Syahril, Syahril; Nurdin, Hendri; Purwantono, Purwantono
Teknomekanik Vol. 2 No. 1 (2019): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.416 KB) | DOI: 10.24036/tm.v2i1.2472

Abstract

Solar power is a renewable energy that can replace oil fuel as the main energy of the ship. The use of fuel oil can worsen the environment in the Maninjau lake tourism area. This paper aims to develop a ship propulsion design using solar power with the main size of the WL bilge Length 367.33 cm, Width (B) 170 cm, Height (H) 70 cm, Draught (T) 30.7 cm. To produce the power needed at a speed of 6 knots, using the method of theoretical analysis by counting, total energy and solar panels to convert sunlight into electrical energy. The result of calculating the total energy needed to reach 6 knots is 0.932 kW. The solar panels needed to produce the power are 4 pieces with a capacity of 100 Wp. This system does not use an inverter because it uses a DC electric motor as a vessel driver. The design of a solar-powered boat can be an option for the community as an environmentally friendly tourist ship without fuel.
Study of Ship Design Maninjau Lake Tourism by Using Catamaran Hull Type and Fiberglass Material Trisyaldi, Ar; syahril, syahril; Purwantono, Purwantono; Waskito, Waskito; Primawati, Primawati
Teknomekanik Vol. 2 No. 1 (2019): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.727 KB) | DOI: 10.24036/tm.v2i2.3072

Abstract

Maninjau lake uses ships designed in a simple way without significant innovation from time to time. This case is caused by design methods that are based on hereditary knowledge from generations to generations, so that the ships that are made tend to have the same shape and size. Innovation is needed to get a higher level of efficiency and effectiveness on a ship. The innovation that needs to be done is the design of ships with a multi-hull shape or catamaran. The pre-design of the catamaran hull is based on using the comparation method as the dimension ratio of the ship, so that the dimensions of the ship are LWL = 4 m; LPP = 3.96 m; B = 1.7 m; B1 = 0.36 m; D = 0.7 m; d = 0.307 m. After that, testing the resistance (resistance) while determining the amount of Power needed. The next step is to analyze Stability and Seakeeping to determine the efficiency and effectiveness of the hull type. Analysis carried out on this type of hull was applied to several models, then the best hull design was found. Each design is distinguished by hull shape, but has the same displacement which is equal to 0.448 tons. The first model of the catamaran hull with the type of Flat Inside Symmetry; second with the type of symmetry Flat Outside; and the third type with gastric Asymmetry.
Stability Study of Flat Hull Ship for Fishing Tourism Nabawi, Rahmat Azis; Syahril, Syahril; Salmat, Salmat
Teknomekanik Vol. 3 No. 2 (2020): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (205.328 KB) | DOI: 10.24036/teknomekanik.v3i2.9272

Abstract

The availability of boats is needed to develop fishing tourism. Most of the boats used so far generally use fishing boats made of woodcut in the forest, so this can damage the environment and cause natural disasters. Ships using a flat plate hull made of steel can be a substitute for wooden ships. This study aims to test the stability of a flat plate vessel designed for fishing boats. The ship stability test was carried out using a computer simulation method using Maxsurf Stability software. The ship stability criteria refer to the International Maritime Organization code A.749 (18), Ch 3-design criteria applicable to all ships. The ship stability analysis was carried out on two variations of the load case. The value of GZ at A h 300, A h 400 and A h 300 - A h 400 for load case 1 and 2 are greater than the minimum standards determined by IMO. The maximum GZ value at load case 1 occurs at an angle of 400 and at load case 2 at an angle of 60.90. The GM value in load case 1 is 0.609 meters and in load case 2 is 0.485 meters. Based on the results of the tests that have been carried out, it can be denied that the flatboat design model for fishing tourism meets the criteria set by the International Maritime Organization.
Loading-dependent mechanical performance of alkali-treated areca nut husk fiber reinforced polyester composites modified with Uncaria gambir extract Nabawi, Rahmat Azis; Syahril, Syahril; Abral, Hairul
Teknomekanik Vol. 8 No. 2 (2025): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v8i2.52472

Abstract

Natural fiber-reinforced polymer composites often experience mechanical performance limitations due to weak interfacial bonds between hydrophilic fibers and hydrophobic matrices. This study experimentally examined the effect of alkali treatment and modification using Uncaria gambir extract (UGE) on the mechanical properties and interface morphology of polyester composites reinforced with areca nut husk fiber (ANHF). Four composite configurations were prepared with a constant fiber weight fraction of 40 wt.% after alkali treatment using 6% NaOH for 24 hours, while the remaining 2 wt.% UGE was selectively applied as a fiber surface treatment, matrix additive, or a combination of both. Tensile and flexural properties were evaluated in accordance with ASTM standards, while interface morphology was examined using scanning electron microscopy (SEM). The results showed that alkali-treated composites without UGE addition had the highest tensile strength, which was attributed to increased fiber surface roughness and mechanical interlocking mechanisms. Conversely, fiber surface modification using UGE significantly increased flexural strength, indicating better stress distribution under flexural loading due to increased interface continuity. However, the addition of UGE to the matrix caused a decrease in tensile strength, which was thought to be related to a reduction in matrix stiffness. SEM observations confirm the presence of distinct interface morphology differences according to the treatment applied. These findings indicate that UGE serves primarily as a bio-based interfacial modifier, enhancing flexural performance, while its effectiveness is strongly governed by the mechanical loading mode.
Co-Authors A Halim A.A. Ketut Agung Cahyawan W Abd. Rasyid Syamsuri Abdul Aziz Abdul Wahab Abdullah, MT, Dr. Rijal Abdullah, Wahyuddin Abral, Hairul Abrar Tanjung Abrar Tanjung Abrori, Faizul Ade Candra, Ade Adelina, Yustika Adi, Nelfia Aditia, Jefri Afif Rahman Riyanda Aflin Dwi Fajar Afriliyan, Rahmatul Agariadne Dwinggo Samala Aglis Andhita Hatmawan, Aglis Andhita Agus Setiawan Ahmad Fajar Ahmad Husein, Ahmad Ahmad Nurhuda Aini, Nur Rohmatul Aldio, M. Fikhri Alfian Alfian Alim, Irwan Alinur, Armayanti Alisman, Alisman Almansa Fitra, Mohamad Alwifari, M. Qari Alwiyah Alwiyah Amalia, Putty Maura Ambiyar, Ambiyar Amien, Muhammad Aminuddin, Fattachul Huda Aminuyati Amiruldin, Rizki Amriani, Nilda Ana Fitriyatul Bilgies, Ana Fitriyatul Anam, Rifat Shafwatul Ananda Putri, Ananda Andati, Jilla Andre Kurniawan Andre, Joni Andykhatria, Andykhatria Anisa cairani Anisah Anugrah, Septriyan Aprilia, Nadia Ardian, Ibnu Arham, Zulvika Anisa Arie Saputra Arif Rahman Arifhan, Rafly Fadhilah Arisna, Puput Ariyanti, Putri Novira Arsela, Maria Arsuwendi, Arsuwendi Aryanto Aryanto Aulia, Ihsanul Austin, Diah Anggraini Awaludin Awaludin, Awaludin Ayu Ningrum, Tia Azhar Azhar Azis, Hasbi Azizah Amini Azizahwati Azizahwati Baehaqi Bambang Hermanto Bambang Sugeng Subagio Bangun, Elsi Titasari Br Barung, Rachmat Basir B Basril, Ali Batubara, Hendra Saputra Bestari, Putri Bestri, Rafikah Boil, Silvermen Boy, Gasper Br Bangun, Lonaria Budi Syahri Bunga Ramadhana, Aisyah Burhanuddin Burhanuddin Cahyani, Dina Caniago, Winda Safitri Catrayasa, I Wayan Chandra, Rofi Citra, Helfira Claudia, Vista Dali, Randi dari, diana wulan Datu Anggareksa Debri Yosintiara Dedi Supendra Dedy Irfan Defi, Wahyu Fitrina Delviandri, Rahmi Desri, Rahmania Desti Syavira Amanda Dewi Widiyastutin Suripto Dewi, Risna Dewi, Wini Efrika Dhea Deswita Sari Dian Ariani Dian Safitri Dicky Wahyudi Doharni, Hasnah Doni Winarso, Doni Dyna Marisa Khairina Edo Arribe, Edo Eke Wince, Eke Elmanisar, Velnika Elwardah, Khairiah Elza, Elza Erizon, Nelvi Ermita Ermita ERNA SURYANI Ernidawati, Ernidawati Erwindani, Erwindani Fadel Mubarak Fadhilah Fadhilah Fadholi, Muhamad Fadly Nendra Fadrial, Yogi Ersan Fahmi Rizal Fajrah, Ria Nur Fajri, Suryadi Fajrizal Fajrizal, Fajrizal Fakhruddin Fakhruddin Fakhruddin Z Farilya, Mita Fatriyanto, Fatriyanto Fauni, Arini Maya Fauzia Rahma, Khairo Fauziat, Najwa Zuhuriati Febri Prasetya Febrianti, Ina Febrianti, Sari Febrina, Weli Feronika, Feronika Fikri, Rijalul Firmansyah, Muhammad Maya Fitra, Dinul Fitra, Rizki Fitriadi Fitriadi Fitrisna, Hana Fourinta, Ananda Furqan, Teuku Kamal Gaddafi, Muammar Ganefri . Geni Firuliadhim, Geni Ginanjar, Singgih Guci, Taufik Hadi, Fajri Hadiyanto Hadiyanto Hafid Hafid, Hafid Hafis, M Hafsari, Rizka Hakim, Annisa Hamdani, Riza Nugra Hamdhan, Indra Noer Hamler Hamler Hamsir Hamsir Hamzah, Muh. Qardawi Hamzah, Syukri Hanif Muzakki, Naufal Hapzi Ali Harmaini Harmaini Hasbiana Anwar Hasibuan, Zulkarnain Haslina Haslina Hasratuddin Hasratuddin Hawing, Hardianto Hayati, Hazimah Dzikra Hebron, Hebron Hellani, Anisa Helmi Noviar Hermansyah, Firman Hermanto, Andi Hery Kresnadi Himawan, Ferdiansyah Hutasoit, Hasudungan Ibrahim Al Razzak Ikhsan, Haerul Iklima Nur Aulia Ilham, Al Ilham, Kurniadi Ilyas Suratman Imron Natsir, Imron Indah Putri Raflianita Indah, Sandra Gamba INDRAYANI INDRAYANI Inggriani, Siska Intan Mayang Sari Irfan Sulthoni Irianto, Kartika Dewi Irma Yulia Basri Irmayani Irmayani Irnawati Irnawati Irsyad, Irsyad irsyad, irsyad Irwansya, Muh. Irzal, Irzal Islamiah, Farida Iwan Iwan Jamil, Muh Jamil, Soraya Nuron Jamilah, Yumn Janah, Fathul Jasrial Jasrial, Jasrial Jasriani, Jasriani Jeffriansyah Dwi Sahputra Amory Joni Taufik Hidayat Juita, Ani Sri Junil Adri Jurianto Kadri, Hanif Al Khairul Hadi Khanan, Ryan Mufasil Khojir Kiong, Tee Tze Korompot, Nur Kresnadi, Rosnita KURNIA KURNIA, KURNIA Laden, Delfan Rynaldo Lamsir, Seno Latifa, Dinda Khaira Leli Putri Ansari Lindawati Lindawati Lismaryanti, Lismaryanti Lola Yustrisia Lusi Susanti, Lusi M Said Abdullah M. Nasir M. Rahmad Ma'aruf, Zuhdi Maharani Putri, Yori Mahesi Agni Zaus Mahgrifa Auliana Rahim Mahrizal Mahrizal Maliza, Nabila Manalu, Meyanti Mardaleta, Mardaleta Mardiansyah Mardiansyah, Mardiansyah Marfin, Muhammad Margana, Riki Ridwan Margayasa, I Ketut Mariam Mariam Marjanis, Marjanis Marjoni, Del Marwenny, Elwidarifa Masbur Masbur Masraudhah, Masraudhah Maulianawati, Diana Maurizka Khoirunisa Melda Fajra Metro, Wardi Misti, Afifah Mitri Irianti Mochammad Imron Awalludin Moh. Baqir Ainun Moh. Kurdi Mohammad Herli Mohammad Hidayaturrahman Monalisa, Zainatun Muammar Khaddafi Muarif, Putri Fadhilla Muda, Rudin Mudinillah, Adam Muh. Fadli Muhammad Nasir Muhammad Syarif, Muhammad Muhammad, Fadil Mukhamad Ilyasin Muliati, A. Murdiono Murdiono, Murdiono Mustaqin, Iqbal Muzakir Nabawi, Rahmat Azis Nadia Putri Naess, Victor Firstkiel Feber Naila Fauza Naska N, Naska N Nasrun, Moh Nastifauziah, Hafifi Nasty, Aulia zulkarnaen Nasution, Lily Karlina Nasution, Suriani Nellitawati Nellitawati Netriwati Nifriza, Ifna Ningsih, Selly Kudrati Nino Sri Purnama Yanti Nizwardi Jalinus Norsafira, Mira Noval Suhendra Novalinda, Rina Novendra, Rizki Noverta, Widiyati Novi Hendri Adi Novi Luthfiyana Nugraha, Wisnu Nur Aisyah Nur Islami Nur Syafaat Nuraini Asriati Nurasyiah, Nurasyiah Nurdin Hendri Nurfaidah Nurfaidah Nurinda, Nurinda Nurrenti, Aulya Sukma Oktofani, Khansa Nuansa Oky Setiawan Paputungan, Andika Pardi, Yusriadi Parijo Parijo Prasasto, Angger Bagus Pratama, Awal pratiwi, juli Preti, Agia Kulkarni Primawati Primawati, Primawati Purnama Yanti, Nino Sri Purwanto, Wawan Purwantono, Purwantono Putri Izzatunnisa Putri Putri, Putri Putri Ramadhani, Putri Putri Riwana, Presti Putri, Anju Maulidhea Putri, Arpini Putri, Aulia Rahmi Putri, Bella R. Rusli Rachmat Barung Rachmiati Sunarya, Fitri Rafdi, Faris Abi Rahayu, Rati Rahmad Cahaya Rahmad Firdaus Rahmad Husein Rahmadayena , Shylfia Rahmatullah, Ramadhani Rahmawati, Milatul Rahmawati, Rahmawati Ramadhan, Ozi Ramadhani, Witri Ramli S Ramli Semmawi, Ramli Raoda, Andini Aisyah Nur Refdinal, Refdinal Reni Dahar Rhena, Rhena Ridha Nuradila Ridwan, Ridwan Rifai, Muhammad Aditya` Rifelino Rifelino Rifma Rifma Risma, Okta Rabiana Risnal Diansyah, Risnal Rispendra, Rispendra Rizky, Fahrul Ronal Watrianthos Rony Wahyudi, Rony Rosidah, Ana Rosidawati Wiradirja, Imas Rosminah, Rosminah Roza, Nelfa Rusdinal, Rusdinal Rusnani Rusnani S, Risa Azka Sabandi, Ahmad Saiful Badli Saiful Badli, Saiful Saifullah Idris Salim, Rezky Azhari Salma Salma Salmat, Salmat Salny, Revina Samtidar, Samtidar Sanchia Leona, Maidella Santika, Tiara Santoso , Yulianto Santoso, Yulianto Saputra, Arfi Sari, Siti Wulan Sarmadan Pohan Sasra Maiharja, Regi Sembiring, Maximus Gorky Sendi Ramdhani Septya Maharani, Septya Shaputra, M Rio Eka Shifa, Mutiara Siegfried Siegfried Silitonga, May Exaudi Silvia Silvia Simanjuntak, Meita Simbara, Adam Siregar, Lenni Marlina Sitepu, Tunggul Siti Hajar Thaitami Siti Shania Marirah Siti Zulaikha Sri Utami, Dinda Sri Wahyuni Sriwahyuni, Eci Suci Ariani Sufyarma Marsidin Suhendra, Noval Sukardi Sukardi Sulahyuningsih, Evie Sulastri Sulastri Sunanto Sunanto Sunarto, Suhaera Sururi Sururi, Sururi Surya Ningsih Suryani Musi Susi Handayani Sutan Emir Hidayat Sutejo Sutejo SUTRIONO SUTRIONO Syafrida, Mexi Syahputra, Oktavian Yoga Syahreza Pahlevi Syahruddin Syahruddin Syahrul Syahrul Syaiful Islami Syam, Fahmi Syamsul Muarif Syamsul Rizal Syuhri, Saifuddin Taslim Taslim Taufiq, Reny Medikawati Tonny Judiantono Topik, Alda Toresa, Dafwen Totok Hermawan, Totok Tranminingsih, Utami Trisni, Nurila Trisyaldi, Ar Ummami, Wage Utama, Dian Sandi Utami, Batina Yulia Vilmala, Berry Kurnia Vitalyevna, Sokolova Elizaveta Wahyu Wahyu Wakhinuddin Wakhinuddin, Wakhinuddin Walef, Sri Mures Waskito Waskito, Waskito Wayan Catra Yasa, I Wicaksono, Adam Nur Wide Mulyana Widya Ramadhani Wijaya Panjaitan, Pita Uli Artha Wijaya, Setyawan Ardhi Win Konadi Wulansari, Rizky Ema Yahya Yahya Yanti, Siti Hikma Yelda, Nira Yennita Yonni Kurniawan Yulianta, Agus Giri Yulianti, Lili Yulistio, Didi Yunidar Purnama Sari Yusi Hidjrawan Yusra, Ilhamdi Zahra Meiza Zainal Abadi Zainal Asril Zainuddin, Zaidah Zaky Lutfy Ramadhan Zalzabila Nurul Faizah Zibran, Zibran Zikri, Ahmad Zilfa Zilfa Zuhdi Arman Zuhdi Ma’aruf Zulhelmi, Zulhelmi