p-Index From 2021 - 2026
7.662
P-Index
This Author published in this journals
All Journal Jurnal Gaussian Jurnal Online Mahasiswa (JOM) Bidang Ilmu Sosial dan Ilmu Politik Jurnal Online Mahasiswa (JOM) Bidang Ilmu Ekonomi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Jurnal Mahasiswa Fakultas Hukum Jurnal Administrasi Bisnis INTEKNA Jurnal Ilmiah Mahasiswa Pendidikan Geografi Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) JURNAL MAHASISWA BK AN-NUR : BERBEDA, BERMAKNA, MULIA Literasi: Jurnal Ilmiah Pendidikan Bahasa, Sastra Indonesia dan Daerah Eksakta : Berkala Ilmiah Bidang MIPA Transparansi Jurnal Ilmiah Ilmu Administrasi Jurnal Perangkat Lunak Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Wahana Dedikasi : Jurnal PkM Ilmu Kependidikan Jurnal Administrasi Publik dan Pembangunan (JPP) TAFSE: Journal of Qur'anic Studies juremi: jurnal riset ekonomi Jurnal Riset dan Pengabdian Masyarakat JCDD International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Jurnal Teknologi Al-MIKRAJ: Jurnal studi Islam dan Humaniora Jurnal Pengabdian Mandiri Jurnal Teknik Mesin, Industri, Elektro dan Informatika International Journal of Integrative Sciences Fusion : Jurnal Pengabdian Kepada Masyarakat KHIDMAH: Jurnal Pengabdian kepada Masyarakat Jurnal Riset Manajemen Gudang Jurnal Multidisiplin Ilmu Jurnal Yudistira RechtIdee Akuntansi: Jurnal Riset Ilmu Akuntansi Journal of Contemporary Law Studies Jurnal Ilmu Fisika dan Terapannya (JIFTA) Jurnal Manajemen, Akuntansi dan Logistik (JUMATI) Corona: Jurnal Ilmu Kesehatan Umum, Psikolog, Keperawatan dan Kebidanan Jurnal Pengabdian Masyarakat dan Riset Pendidikan Moneter : Jurnal Ekonomi dan Keuangan JURNAL ILMIAH PENELITIAN MAHASISWA International Journal of Community Engagement and Development Jurnal Ekonomi dan Pembangunan Indonesia Inovasi Kesehatan Global Protein: Jurnal Ilmu Keperawatan dan Kebidanan Baktimu : Jurnal Pengabdian Kepada Masyarakat Venus: Jurnal Publikasi Rumpun Ilmu Teknik Prosiding Seminar Nasional Ilmu Pendidikan Hirarki : Jurnal Ilmiah Manajemen dan Bisnis Al-Qadim - Jurnal Tafsir dan Ilmu Tafsir Reflection: Islamic Education Journal International Journal of Mechanical, Electrical and Civil Engineering Kesejahteraan Bersama : Jurnal Pengabdian dan Keberlanjutan Masyarakat Masyarakat Mandiri: Jurnal Pengabdian Dan Pembangunan Lokal AT-TAKLIM: Jurnal Pendidikan Multidisiplin International Journal of Politics and Public Pulicy Buitenzorg: Journal of Tropical Science Joong-Ki Ekopedia: Jurnal Ilmiah Ekonomi Baktimu : Jurnal Pengabdian Kepada Masyarakat Jurnal Pengabdian Kader Bangsa Jurnal Mitra Pengabdian Farmasi Jurnal Ilmu Hukum Catha : Jurnal Penelitian Kreatif dan Inovatif Al-Khazin: Jurnal Pendidikan Agama Islam The Indonesian Journal of Islamic Economics Research
Claim Missing Document
Check
Articles

Analisis Gelombang Elektromagnetik pada Transmisi Jaringan 5G di Indonesia Rafif Abyakto; Qonita Auliani; Naif Baihaqi; Muhammad Rizki; Diyajeng Luluk Karlina
Jurnal Teknik Mesin, Industri, Elektro dan Informatika Vol. 3 No. 4 (2024): Desember : JURNAL TEKNIK MESIN, INDUSTRI, ELEKTRO DAN INFORMATIKA
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jtmei.v3i4.4545

Abstract

Electromagnetic waves in 5G transmission in Indonesia, a cellular network based on electromagnetic waves, which has revolutionized wireless communications. This wireless technology is more advanced than previous wireless technologies (1G, 2G, 3G and 4G). Electromagnetic waves are a type of electromagnetic radiation consisting of electric and magnetic fields moving simultaneously. 5G operates at a higher frequency than previous cellular technologies. The relationship between 5G signals and electromagnetic waves and their impact on signal performance and range. Here we discuss how 5G operates at higher frequency ranges, including millimeter wave (mmWave), which offers very high data speeds and large capacities. 5G technology is a fifth generation wireless communication network that offers faster data speeds, lower latency, and greater connection capacity compared to previous generations. Of particular concern is the impact of the electromagnetic fields (EMF) generated by this technology on the environment and human health. 5G technology uses higher frequencies in the millimeter wave (mmWave) spectrum, reaching 24 to 100 GHz, in addition to low to medium frequencies also used by 4G networks. Research has shown that the electromagnetic field of 5G technology has different properties, such as shorter wavelengths so that the penetration depth into living tissue is smaller.
Synthesis of Kaolinite Nanotubes as Heterogeneous Catalysts for Transesterification Reaction of Waste Cooking Oil into Biodiesel Muhammad Rizki; Fitri, Ernarisa; Syukri Arief; Rahadian Zainul; Syukri
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 04 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss04/545

Abstract

Kaolinite, a naturally abundant clay mineral, possesses a significant surface area and catalytic properties. To enhance its catalytic efficiency, modification into kaolinite nanotubes is necessary, as this transformation increases surface area and porosity. The synthesis of kaolinite nanotubes was achieved through a solvothermal method, incorporating multiple intercalation and rolling processes influenced by ultrasonic waves, subsequently utilizing these nanotubes as heterogeneous catalysts. The resulting kaolinite nanotube catalysts exhibited well-defined nanotube morphology and were applied in the transesterification of waste cooking oil, with variations in methanol-to-oil ratios. The optimal biodiesel yield achieved was 49.84%, obtained after a 3-hour reaction period using a 3% w catalyst at 60 °C, with a methanol-oil ratio of 3:1. This research highlights the potential of kaolinite nanotubes as effective catalysts in biodiesel production.
Metodologi Dan Konsep Hadis Sahih Imam Muslim Di Era Kini Syahrudi Nst; Idris Siregar; Muhammad Rizki; Zikra
Gudang Jurnal Multidisiplin Ilmu Vol. 3 No. 1 (2025): GJMI - JANUARI
Publisher : PT. Gudang Pustaka Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59435/gjmi.v3i1.1263

Abstract

Imam Muslim merupakan salah satu tokoh besar dalam sejarah Islam yang memberikan kontribusi signifikan dalam bidang ilmu hadis. Melalui karya utamanya, Sahih Muslim, beliau menyusun koleksi hadis yang diakui sebagai salah satu kitab hadis paling otoritatif dalam Islam, berdampingan dengan Sahih Bukhari. Penelitian ini bertujuan untuk menggali lebih dalam tentang kehidupan Imam Muslim, metodologi yang digunakan dalam menyusun hadis, serta dampak karyanya terhadap perkembangan ilmu hadis dan masyarakat Muslim secara luas. Dengan pendekatan studi literatur, jurnal ini menganalisis sumber-sumber primer dan sekunder terkait kehidupan dan karya Imam Muslim. Hasil penelitian menunjukkan bahwa kejelian Imam Muslim dalam menyeleksi dan mengklasifikasi hadis memberikan sumbangsih besar bagi keilmuan Islam, khususnya dalam memastikan validitas hadis. Selain itu, karyanya menjadi rujukan utama bagi para ulama hingga saat ini, menunjukkan relevansi yang terus berlanjut sepanjang sejarah. Penelitian ini menegaskan bahwa Imam Muslim tidak hanya berperan sebagai ulama hadis, tetapi juga sebagai pelopor metode ilmiah dalam tradisi Islam.
Pendidikan Sebagai Pembentuk Karakter Era Modern Menurut Perspektif Ibnu Khaldun Muhammad Rizki; Putri Dewi Sinta; Herlini Puspika Sari
Reflection : Islamic Education Journal Vol. 2 No. 1 (2025): Reflection : Islamic Education Journal
Publisher : Asosiasi Riset Ilmu Pendidikan Agama dan Filsafat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/reflection.v2i1.425

Abstract

The role of education in shaping character has been a subject of discourse throughout history, with its significance amplified in the face of contemporary challenges. This study examines the relevance of Ibn Khaldun's educational philosophy in the context of modern character formation. The reseaarch aims to analyze Ibn Khaldun's perspective on education and its potential application in contemporary character-building efforts. A qualitative approach is employed, focusing on a comprehensive review of secondary sources and scholarly interpretations of Ibn Khaldun's educational theories. The study synthesizes various perspectives on Ibn Khaldun's educational philosophy and examines their applicability to current educational practices and challenges. This approach allows for a broader understanding of Ibn Khaldun's ideas within the context of modern educational needs. The study reveals that Ibn Khaldun's educational theory emphasizes the integration of religious, moral, and practical knowledge in character development. His holistic approach to education, which includes the cultivation of critical thinking, social skills, and ethical values, aligns closely with current educational needs. The findings suggest that Ibn Khaldun's educational principles can significantly contribute to addressing modern character-building challenges, particularly in fostering resilience, cultural understanding, and ethical decision-making among students. This research provides valuable insights for educators and policymakers in developing comprehensive character education programs that balance traditional wisdom with contemporary demands. Moreover, it highlights the importance of revisiting historical educational philosophies to inform and enrich modern a pedagogical practices, especially in the realm of character education.
Analisis Peran Desentralisasi sebagai Solusi untuk Mengatasi Ketimpangan Pembangunan di daerah Septiyandri Sya'bani Zidane; Desi Mehliyana; Davina Indah Ramadhani; Muhammad Rizki; Muhammad Rusdan; Syalsabila Syalsabila; Citra Darminto
JURNAL ILMIAH PENELITIAN MAHASISWA Vol 3 No 1 (2025): Februari
Publisher : Kampus Akademik Publiser

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jipm.v3i`1.656

Abstract

The development disparity among regions in Indonesia poses a significant challenge that can hinder economic growth and create social jealousy. This study aims to analyze the factors causing development disparity, the role of decentralization in addressing it, and the forms of decentralization implementation in Indonesia. The study collects data on variations in the Human Development Index (HDI) using a qualitative method and a descriptive analytical methodology. infrastructure distribution, and development fund allocation. The findings indicate that disparities are caused by differences in natural resources, demographic conditions, concentration of economic activities, and uneven fund allocation. Decentralization through regional autonomy, special allocation funds, special autonomy, and direct regional head elections offers solutions to accelerate equitable development. However, the success of decentralization heavily depends on regional readiness in managing resources and enhancing infrastructure and human resource capacities..
Analisis Potensi Unggulan Kabupaten Empat Lawang Menggunakan Alat Analisis Regional Marini Wulandari; Muhammad Rizki; Sumiyarti Sumiyarti
Jurnal Ekonomi dan Pembangunan Indonesia Vol. 2 No. 4 (2024): November : Jurnal Ekonomi dan Pembangunan Indonesia
Publisher : Asosiasi Riset Ekonomi dan Akuntansi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/jepi.v2i4.929

Abstract

Empat Lawang Regency, once classified as a disadvantaged region, has made significant progress in improving the welfare of its population. This is reflected in the declining poverty rate and increasing Human Development Index (HDI). However, the region's economic growth, as measured by GRDP and GRDP per capita, lags behind other regions in Sumatera Selatan. This research seeks to pinpoint the key economic sectors driving Empat Lawang Regency's development by employing a combined analysis of LQ, Shift Share, and Tipology Klassen. The analysis results indicate that no sector can be unequivocally classified as a leading sector in Empat Lawang Regency. Nonetheless, several sectors such as agriculture, forestry, fisheries, wholesale and retail trade, also the other sectors exhibit potential for further growth. These findings underscore the importance of targeted policies and investments to stimulate economic growth and enhance the livelihoods of the local population.
Proses Port Clearance In/Out Dengan Inaportnet Kapal SV. PACIFIC LEGACY Oleh Perusahaan Pelayaran PT. Sanindo Antar Nusa Pada Kantor Kesyahbandaran Lhokseumawe Muhammad Rizki; Syarifur Ridho; Yefta Vianus Marbun
JURNAL RISET MANAJEMEN (JURMA) Vol 3 No 1 (2025): JURNAL RISET MANAJEMEN (JURMA)
Publisher : Institut Teknologi dan Bisnis (ITB) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54066/jurma.v3i1.3052

Abstract

This study aims to describe the Port Clearance process for SV vessels In/Out PACIFIC LEGACY with Inaportnet implemented by PT. Sanindo Antar Nusa at the Lhokseumawe Harbormaster's office. Inaportnet is an electronic portal that facilitates the exchange of port service data and information quickly, safely, neutrally and easily, and is integrated with government agencies, port business entities and logistics industry players to increase the competitiveness of the Indonesian logistics community. The activities of various government agencies at ports aim to support the implementation of the main tasks and functions of ports as connectors, interfaces, gateways and industrial entities. Government agencies related to shipping and shipping include the Port Authority and Harbormaster. Apart from that, other government agencies such as Customs, Immigration and Quarantine also operate at the port. Overall, Port Clearance In/Out process for SV vessels. PACIFIC LEGACY carried out by PT. Sanindo Antar Nusa using Inaportnet has been running well, including the clearance in, clearance out and Port Clearance issuance processes in accordance with procedures and carried out carefully in filling in ship records. This paper was written using the Field Research and Library Research methods.
Strategi Digital Marketing Dalam Meningkatkan Penjualan Burgo Di Palembang Tata Sutabri; Nailah Ramadhani Laboy; Putri Asyifah Vahlevi; Muhammad Rizki
Akuntansi Vol. 2 No. 4 (2023): Desember : Jurnal Riset Ilmu Akuntansi
Publisher : Asosiasi Riset Ekonomi dan Akuntansi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/akuntansi.v2i4.1284

Abstract

Burgo is a kind of vegetable rice cake commonly eaten for breakfast by the people of Palembang. Burgo is made from a mixture of rice flour and starch shaped like a pancake and then cut into pieces like rice cakes then doused with fish sauce. This food recipe has been around for a long time and has been passed down from generation to generation. Even now this burgo food has been traded in stalls or eating places that serve it. This research aims to increase burgo sales in Palembang by using digital marketing strategies and how they can manage the digital. The method used is a literature study by collecting data from scientific journals and articles related to digital marketing strategies and burgo sales in Palembang. The results showed that with the presence of Burgo cakes in the market and the ease of buying them, Burgo can be a product that is highly appreciated and favored by the younger generation and other circles of society, in addition to being a snack food product that can compete with other snacks. Promotional strategies with creative visual communication messages by creating posters accompanied by illustrations and graphics so that people can always remember the existence of this traditional cuisine in the future to create a modern impression. The use of modern style with a traditional touch aims to attract people, especially the younger generation, to be interested in buying traditional food products typical of Palembang, especially burgo and other traditional Palembang dishes. this may be popular among young people. And the purpose of this promotion is that people, especially the younger generation, know the existence of this burgo food and want to make it a daily snack through promotional campaigns, target audiences, design styles that the target audience likes and very easily reach the target.
Optimalisasi rumah baca untuk meningkatkan kemampuan literasi masyarakat Pesisir Desa Kwala Gebang Diyan Yusri; Anjur Perkasa Alam; Muhammad Zahid Albuni Pane; Muhammad Rizki; Ari Anggara
Fusion: Jurnal Pengabdian kepada Masyarakat Vol. 4 No. 1 (2025): September
Publisher : peduli riset dan pengabdian masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Reading Houses is a forum for providing reading material for the community in order to meet the needs of the community to access information and knowledge and increase reading hobby. The limitations of facilities and infrastructure in the village make the benefits of reading homes not be felt optimally. This causes a lack of interest and motivation to learn through reading. Even though the development of community literacy is very dependent on reading the people. Kwala Gebang Village is a village located in Gebang District Langkat Regency which has the potential to develop a reading house. Therefore the solution offered is through the community service program, namely the optimization of reading homes to improve the literacy capabilities of the coastal community of Kwala Gebang Village. The program was held from March 15, 2025 to March 22, 2025. The program implementation includes the arrangement of reading houses, the formation of study groups and the implementation of the assistance to read, write and counting. The target of this program is Kindergarten, SD and MTss in Kwala Gebang Village. This program can improve the skills of kindergarten children, elementary and mtss in Kwala Gebang Village. Therefore, the optimization of the reading house is expected to improve literacy capacity, especially the coastal community of Kwala Gebang Village.
Kemampuan Menulis Teks Eksplanasi Siswa Sekolah Dasar SD Negeri Saruaso Muhammad Rizki; Chandra Chandra; Inggria Kharisma
Jurnal Yudistira : Publikasi Riset Ilmu Pendidikan dan Bahasa Vol. 3 No. 3 (2025): Jurnal Yudistira : Publikasi Riset Ilmu Pendidikan dan Bahasa
Publisher : Asosiasi Riset Ilmu Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/yudistira.v3i3.1971

Abstract

This study aims to describe the ability of sixth-grade elementary school students in understanding and writing explanatory texts. The method used in this research is a qualitative approach with descriptive techniques. The subjects of the study were five sixth-grade students selected purposively. Data were collected through a 10-item multiple-choice test. The results showed that three students achieved perfect scores (10 correct), one student answered 9 correctly, and another answered 8 correctly. In the writing task, all students were able to compose explanatory texts with appropriate structure. However, weaknesses were found in the linguistic features, particularly in the use of causal conjunctions and scientific terminology. These findings indicate that students have a good grasp of the basic concept of explanatory texts but require further guidance in mastering linguistic elements.
Co-Authors Abdul Wahab Abdi Abiyyu Imamul Abriyoso, Octojaya Ade Priyatna Adelia Khoirunnisa Andari Adi Saputra Ismy Adnan Afrinnisa Herawati Simbolon Agung Palendra Agus Mahardika Agus Rusgiyono Agus Rustamana Agustinus Sihombing Ainun Mardiah Aldora Pratama Alfitri Rizka Rinanda Ali Fakhrudin Alqirana, Rizkyna Jihan Amin, Badaruddin Aminuyati Ana Fitria Ana Haziqah A Rashid Andini Suparmun, Arifah Cahyo Andreanto Anggie Maulia Anjani Nur Febriyanti Anjur Perkasa Alam Anoesyirwan Moeins Apipah Apipah Ari Anggara Arief Kuswidyanarko Ariska Juniarti Armansyah, Armasyah Asyiq, Abdullah Atika Azzahra Azimah Dianah Baharuddin Abbas, Baharuddin Beby Melati Budi Priyono Chandra Chandra Charlina ' Citra Darminto Cut Mah Bengi Aminesta Darmawan Davina Indah Ramadhani Dayanti Nuroazi Utari Desi Mehliyana Desimaria Panjaitan Didik Aribowo Diyajeng Luluk Karlina Diyan Yusri Djamhur Hamid Dr. Ir. Latifah, M. T Dudung Burhanudin Dwi Satria Nugraha Eko Harsoyo Eko Setia Budi Elfera Rizky Ena Vadila Engeline Marlin Erick Immanuel Erik Iman Heri Ujianto Eva zuraidh Fadillah Binti Zaini Fahtur Rahman Fara Berliana Fatahuddin, Fatahuddin Fatma Febri Asti Hilda Zatira Febri Yuliani Ferlita Ferlita Fitri, Ernarisa Giyanah, Siti Halimah Mohd Yusof Hamdani, Hamdani Haniah Hanafie Haniffah Maharani Azahra Helen Oktafiani Henni Riyanti Herlini Puspika Sari Herman Ibrahim Idris Siregar Iin Darmiyati Ikke Aulia Nabila Ilham Saputra Imelda Zaskia Putri Imron Rosadi Inggria Kharisma Iqbal Ubaidillah Iradhad Taqwa Sihidi Jajang Abdul Jabar Jazuli Fadil Kamaldi, Alfian Kurniawaty Fitri Laily Maghfiroh Leli Arnita Lilian Lilian Lubis, Fitriani Surayya Luthfi Nurul Hayati M. Ardian Pratama M. Zidan Mubarok Maidayani Maidayani Mansuriza Mansuriza Marini Wulandari Mas Idayu Saidi Masnaeni Melisa Pujiandini Mia Enjelina Mia Kaitana Helyanan Moch. Abdul Mukid Moh Fuzan Yasin Mohd Sharial Bungsu Muhammad Aldi Firdaus Muhammad Dewanto Adi Saputra Muhammad Dicky Saputra Muhammad Firdaus Muhammad Habbibun Nizar Muhammad Iqbal Aqilsah Muhammad Mursalin Muhammad Nur Hidayat Muhammad Rafael Muhammad Raihan Aditya Muhammad Ridwan Muhammad Rusdan Muhammad Syaiful Rahmat Ariyadi Muhammad Zahid Albuni Pane Muhbib Fazlurrohman Muqtafin, Muqtafin Muslimin Muslimin Nada Syifa Nurulhuda Nadia Anugraini Naif Baihaqi Nailah Ramadhani Laboy Nanda Kristia Santoso Nazaruddin Nida Fauziyah Nida’ unnuha Mufida Nijusiho Manik Nofirza Novi Ernawati Novi Shintia Noviatul Rochmah Nur Fajri Faiz Nur Salamah Okvrilllia Reony Ondri Osni Erza Perani Rosyani Pernanda Bhatara Putri Asyifah Vahlevi Putri Dewi Nurhasana Putri Dewi Sinta Qonita Auliani Rafif Abyakto Rafli Muhammad Rahadian Zainul Rahmat Hidayat Rahmatullah Ramadhani, Dwi Aryanti Reli Yani Resti Amalia Rian Setiawan Rianto Rianto Ridwan Ridwan Rifki Alfarizi Riki Herman Rina Desiana Rita Arieza Riyan Aditya Rizaldi Safriadi Samsul Bahri Sanwani Saparuddin Saputra, Eka Kurnia Sari Fitri Satriadi Satriadi Sella Titania Selvi Fauzar Septiyandri Sya'bani Zidane Sewaka Silvia Rismayanti Siti Nurhikmah Pujiati Suci Hidayah Sudarmin Sumaryanto Sumiyarti Sumiyarti Suparno Suparno Suparno Supriyadi, Tugimin Susi Hendriani Susi Kurnianingsih Syahrudi nst Syalsabila Syalsabila Syarifur Ridho Syukri Syukri Arief Syukriadi Syukriadi Tata Sutabri Thamrin Kamaruddin Tri Yuli Ardiyansah Trisylvana Azwari Tubel Agusven Vina Yuliasih Vitria Margharet Vivi Oktaviani Dwi Anggraini Wulandari Wulandari Yadi Putra Yefta Vianus Marbun Yenni Elizah Yogi Sumantri Yono Cahyono Yudi Nugraha Yundari, Yundari Yuniadi Mayowan Yusra Dewi Siregar Zada Aulia Munawarah Zeffanya Raphael Wijaya