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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis IJOG : Indonesian Journal on Geoscience GEA, Jurnal Pendidikan Geografi JATI (Jurnal Mahasiswa Teknik Informatika) International Journal of Research in Community Services International Journal of Global Operations Research Jurnal Ilmia Widya Pustaka Pendidikan Bulletin of Geology
Abdurrahman, Umar
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Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Languange, Linguistic, Communication & Media Library & Information Science Mathematics Social Sciences Other

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PERANCANGAN DESAIN APLIKASI EDUKASI KOMPUTER BERBASIS MOBILE DENGAN QUIZ INTERAKTIF MENGGUNAKAN CANVA Syahputra, Fahmy; Sabrina, Elsa; Abdurrahman, Umar; Yunansyah Siregar, Wal; Munawwar, Muhammad; Naufal Ilham, Muhammad; Afriansyah Pulungan, Wira
JATI (Jurnal Mahasiswa Teknik Informatika) Vol. 8 No. 5 (2024): JATI Vol. 8 No. 5
Publisher : Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jati.v8i5.11718

Abstract

Pengetahuan tentang komputer menjadi hal yang penting bagi anak-anak dalam era digital saat ini, namun kurangnya media pembelajaran yang interaktif dan menarik menjadi permasalahan utama. Untuk mengatasi hal tersebut, penelitian ini bertujuan merancang aplikasi edukasi komputer berbasis mobile dengan fitur quiz interaktif yang menyajikan materi tentang komponen komputer secara visual. Metode yang digunakan dalam pengembangan aplikasi ini berfokus pada desain antarmuka pengguna (UI) menggunakan Canva, yang memudahkan pembuatan elemen visual seperti ikon, tombol, dan tata letak. Hasil dari desain aplikasi ini menunjukkan bahwa media edukasi ini dapat memberikan pengalaman belajar yang lebih menarik dan menyenangkan bagi anak-anak dalam memahami konsep dasar komputer.
Coral Reef Restoration for Coastal Protection: Water Quality Monitoring in Indonesia Coral Reef Garden Nusa Dua, Bali Burhanuddin, Safri; Badriana, Mochamad Riam; Nur, Ashadi Arifin; Abdurrahman, Umar; Jeon, Chungkyun; Radjawane, Ivonne Milichristi; Park, Hansan; Hutahaean, Andreas Albertino
Indonesian Journal on Geoscience Vol. 11 No. 3 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.3.455-470

Abstract

The Indonesia Coral Reef Garden (ICRG) is a coral reef restoration program with Nusa Dua as one of five sites in Bali. A plantation program has been done by 2020, but it is necessary to monitor the condition. A field survey in Nusa Dua was carried out on October 3-4, 2022 to measure and check ocean parameters that are suitable for coral life and diving in artificial coral reefs installed. In the survey, several points had been measured through CTD Valeport Midas+ prior to measuring ocean parameters in the same location as a preliminary survey done two years in advance. The sea condition of temperature, salinity, pH, turbidity, and DO is 24.89 - 28.69 °C, 33.75 - 34.22 psu, 8.0 - 8.1, 1.19 - 4.27 FTU, and 4.47 - 5.24 mg/L, respectively. Based on the conformity of water quality, the water condition is good for coral growth. A total of 15 locations are used to put artificial coral reefs in many forms or structures. The coral plantation program in Nusa Dua shows promising progress in qualitatively consisting of species of Montipora sp., Acropora sp., and Alcyonacea sp. A continuous measurement is demanded to monitor the condition of coral growth quantitatively.
Land Cover Changes of Pangandaran: Revealing the Tourism Attraction Impact on Coastal Urban Expansion Abdurrahman, Umar; Iskandar, Zahara Sitta; Subiyanto, Subiyanto; Maqbul, Ismail; Alina, Dining Nika; Ismail, Mochamad Rudyansyah
International Journal of Research in Community Services Vol 6, No 2 (2025)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i2.871

Abstract

Land cover changes in the Pangandaran Coastal area are significantly influenced by tourism attractions as well as geographic and socio-economic dynamics. As one of the main coastal tourism destinations in West Java, Pangandaran receives more than 3.5 million tourists annually, which puts significant pressure on the coastal environment. This study uses land cover data from 2017–2023 analyzed using a regression and GIS approach, this study identifies spatial and temporal patterns of urban expansion and their implications for environmental sustainability. The results show that urbanization in Pangandaran is concentrated in the coastal lowlands, especially in Pangandaran and Sidamulih Districts, increasing vulnerability to natural disasters such as tsunamis. This expansion is triggered by the need for tourism infrastructure that often sacrifices natural ecosystems such as mangroves and coastal forests. In Cimerak and Parigi Districts, changes are more influenced by industrial and agro-industrial development, while growth in Cijulang is hampered by karst topography which is less supportive of urban development. Meanwhile, Kalipucang remains relatively natural due to geographic limitations that limit urban expansion. This study emphasizes the importance of sustainable coastal management, including adaptive spatial planning, conservation of critical ecosystems, and community-based initiatives to mitigate risks posed by unplanned urban expansion. The results of this study provide important insights for policymakers to balance tourism-based development with environmental resilience in the coastal area of Pangandaran.
ANALISIS KURANGNYA KEMAMPUAN MAHASISWA DALAM MENGGUNAKAN MICROSOFT WORD DAN DAMPAKNYA TERHADAP PENYELESAIAN TUGAS KULIAH Abdurrahman, Umar; Armando, Gali; Siregar, Wal Yunansyah; Munawwar, Muhammad; Ilham, Muhammad Naufal; Dalimunthe, Syairal Fahmy
Widya Pustaka : Jurnal Ilmiah Pendidikan Vol 13 No 1: Edisi Januari - Juni 2025
Publisher : Jurusan Ilmu Pendidikan FKIP Universitas Mataram

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

Abstract

This research aims to analyze the factors that influence students' ability to use Microsoft Word at Medan State University. Data was obtained through a questionnaire filled out by 30 students with questions related to ICT learning in high school, difficulties faced in using Microsoft Word, level of knowledge regarding important features of Microsoft Word, and the main obstacles in improving the ability to use this application. The method used is a descriptive quantitative method with frequency and percentage analysis. The research results show that the lack of ICT learning in high school (60%) is the main factor causing the lack of skills in using Microsoft Word. In addition, the majority of students admitted that they often faced difficulties in using this application, even though they felt they had a fairly good knowledge of its features. The main obstacle faced is the lack of technological facilities and time to practice. These findings indicate the need to increase ICT learning in high schools and provide adequate facilities in tertiary institutions.
Tidal Characteristic Analysis Utilizing Radar Tide Gauge in Cirebon Seawater Badriana, Mochamad Riam; Abdurrahman, Umar; Arifin Nur, Ashadi; Jeon, Chungkyun; Miliachristi Radjawane, Ivonne; Park, Hansan
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 16 No. 1 (2024): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v16i1.52987

Abstract

Pengukur pasang surut berbasis radar merupakan salah satu pendekatan dalam mengukur elevasi muka air yang mudah diinstal dan dipelihara. Perekaman data pasang surut yang pernah dilakukan umumnya menggunakan palem pasut atau pressure tide gauge. Pada studi ini radar tide gauge dipasang di pelabuhan Cirebon, bagian utara pulau Jawa, untuk mengetahui karakteristik pasang surut di perairan Cirebon. Data elevasi muka air direkam setiap 15 menit dari bulan Juli 2022 hingga November 2023. Komponen pasang surut dihitung menggunakan metode least square dan tipe pasang surut ditentukan melalui bilangan Formzahl. Komponen dominan pasang surut yang diketahui terdiri dari komponen semidiurnal M2, S2, N2, K2, 2N2; komponen diurnal K1, O1, P1, Q1, K1, J1, TAU1; dan komponen perairan dangkal SSA dengan tinggi secara berurutan sebesar 11.98, 5.58, 2.91, 2.11, 1.45, 11.80, 3.89, 6.11, 2.08, 1.56, dan 3.11 (dalam cm). Tipe pasang surut di area kajian adalah campuran condong semidiurnal. Tunggang pasut di daerah studi setinggi 0.8-1 m dengan kondisi pasang saat pukul 6.00-9.00 dan 18.00 - 21.00, sedangkan kondisi surut pada rentang pukul 11.00 - 14.00 dan 01.00 - 04.00. Perhitungan tinggi elevasi berdasarkan datum dilakukan dengan mengkombinasikan komponen pasang surut. Data pengukuran pasang surut menggunakan radar dapat menjadi data alternatif untuk mendukung dan melengkapi data yang terekam di Cirebon serta dapat menjadi pertimbangan untuk pembangunan dan kegiatan maritim lainnya.
ANALISIS PERUBAHAN GARIS PANTAI AKIBAT PEMBANGUNAN JETTY DI WILAYAH PANTAI KARANGSONG, INDRAMAYU, INDONESIA Abdurrahman, Umar; Ningsih, Nining Sari; Suprijo, Totok; Tarya, Ayi
Bulletin of Geology Vol 5 No 2 (2021): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2021.5.2.5

Abstract

Pada tahun 2005 dilakukan pembangunan jetty di muara Sungai Prajagumiwang, tepatnya di Pantai Karangsong, Desa Karangsong, Kecamatan Indramayu, Kabupaten Indramayu, JawaBarat. Pembangunan jetty ini merupakan salah satu solusi dari permasalahan pendangkalan alur pelayaran di wilayah tersebut. Selain berdampak pada aktivitas perikanan setempat, pembangunan jetty ini juga berdampak pada perubahan garis pantai di Pantai Karangsong. Pada penelitian ini, analisis perubahan garis pantai dilakukan dengan memanfaatkan data citra satelit dari Google Earth yang terdiri daritahun 2001, 2008, 2009. 2013, 2014, 2015, 2016, dan 2017. Garis air tinggi dipilih sebagai indikator penentu garis pantai dengan tujuan untuk meminimalisir kesalahan yang dapat terjadi akibat penentuan garis pantai secara manual. Hasil analisis secara kualitatif dan kuantitatif menunjukkan adanya pola perubahan garis pantai yang semula didominasi oleh terjadinya erosi, setelah pembangunan jetty berubah menjadi didominasi oleh akresi. Berdasarkan analisis perubahan luas dan garis pantai yang dilakukan pada penelitian ini, perubahan luas pantai dan garis pantai terbesar terjadi pada periode 2001 –2008 yaitu sebesar 297.136 m2dan 13.897 m. Pada periode 2008 –2017 nilai perubahan luas dan garis pantai menunjukkan kondisi yang berubah ubah dan perubahannya semakin mengecil. Hal ini menunjukkan Pantai Karangsong mengalami proses pantai menuju setimbang. Kata kunci:Perubahan garis pantai, pembangunan jetty, Pantai Karangsong, Google Earth
IMPLEMENTASI OBJECT-ORIENTED PROGRAMMING (OOP) DALAM APLIKASI 'ORDERWASH' BERBASIS DESKTOP MENGGUNAKAN VISUAL BASIC Abdurrahman, Umar; Yunansyah Siregar, Wal; Siregar, Rosma
JATI (Jurnal Mahasiswa Teknik Informatika) Vol. 9 No. 4 (2025): JATI Vol. 9 No. 4
Publisher : Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36040/jati.v9i4.13964

Abstract

Perkembangan teknologi dalam bidang pemrograman memungkinkan penerapan konsep Object-Oriented Programming (OOP) dalam pengembangan perangkat lunak, termasuk pada sistem transaksi laundry. Namun, masih banyak pelaku usaha laundry yang menggunakan pencatatan manual sehingga proses transaksi menjadi kurang efisien dan rawan kesalahan. Penelitian ini bertujuan untuk mengembangkan aplikasi desktop berbasis OOP yang dapat mempermudah pengelolaan transaksi laundry. Aplikasi yang dinamakan Orderwash ini dikembangkan menggunakan bahasa pemrograman Visual Basic melalui platform Visual Studio 2022. Metode penelitian yang digunakan adalah metode deskriptif, yaitu dengan menjelaskan fungsi dari setiap komponen dalam aplikasi dan bagaimana implementasi konsep OOP diterapkan. Hasil implementasi menunjukkan bahwa penggunaan OOP meningkatkan modularitas program, memudahkan proses pemeliharaan, serta memberikan efisiensi dalam pengelolaan data transaksi. Aplikasi Orderwash mampu membantu pemilik usaha laundry dalam mencatat, menyimpan, menghapus, dan mencetak laporan transaksi secara lebih cepat, akurat, dan terstruktur.
Land Cover Changes of Pangandaran: Revealing the Tourism Attraction Impact on Coastal Urban Expansion Abdurrahman, Umar; Iskandar, Zahara Sitta; Subiyanto, Subiyanto; Maqbul, Ismail; Alina, Dining Nika; Ismail, Mochamad Rudyansyah
International Journal of Research in Community Services Vol. 6 No. 2 (2025)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i2.871

Abstract

Land cover changes in the Pangandaran Coastal area are significantly influenced by tourism attractions as well as geographic and socio-economic dynamics. As one of the main coastal tourism destinations in West Java, Pangandaran receives more than 3.5 million tourists annually, which puts significant pressure on the coastal environment. This study uses land cover data from 2017–2023 analyzed using a regression and GIS approach, this study identifies spatial and temporal patterns of urban expansion and their implications for environmental sustainability. The results show that urbanization in Pangandaran is concentrated in the coastal lowlands, especially in Pangandaran and Sidamulih Districts, increasing vulnerability to natural disasters such as tsunamis. This expansion is triggered by the need for tourism infrastructure that often sacrifices natural ecosystems such as mangroves and coastal forests. In Cimerak and Parigi Districts, changes are more influenced by industrial and agro-industrial development, while growth in Cijulang is hampered by karst topography which is less supportive of urban development. Meanwhile, Kalipucang remains relatively natural due to geographic limitations that limit urban expansion. This study emphasizes the importance of sustainable coastal management, including adaptive spatial planning, conservation of critical ecosystems, and community-based initiatives to mitigate risks posed by unplanned urban expansion. The results of this study provide important insights for policymakers to balance tourism-based development with environmental resilience in the coastal area of Pangandaran.
Analyzing Benthic Distribution and Public Infrastructure to Support Tourism Zoning on Tunda Island Subiyanto; Abdurrahman, Umar; Khadami, Faruq; Anwar, Iwan Pramesti
International Journal of Research in Community Services Vol. 6 No. 3 (2025): International Journal of Research in Community Service (IJRCS)
Publisher : Research Collaboration Community (Rescollacom)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v6i3.629

Abstract

This study presents a comprehensive analysis of benthic habitat distribution and public infrastructure on Tunda Island, aimed at developing effective tourism zoning strategies. By integrating high-resolution spatial data derived from field surveys and remote sensing technologies, including multispectral imagery and Geographic Information System (GIS) methodologies, the research delineates distinct zones optimal for diverse tourism activities. The findings indicate that the southern and southeastern parts of the island, characterized by sandy substrates and proximity to resorts and docks, are well-suited for intensive tourism. Conversely, the northern and northwestern regions, dominated by coral and rocky substrates, are proposed for conservation-oriented educational tourism due to their rich biodiversity. The research also highlights the potential of community-based tourism facilitated by existing public infrastructure such as schools and mosques, which supports local engagement in tourism development. The resultant zoning map serves as a vital tool for local authorities and stakeholders in Tunda Island, guiding sustainable tourism management practices that value ecological integrity and community involvement. This study underscores the importance of interdisciplinary approaches in ecological monitoring and tourism planning, contributing to the broader discourse on sustainable practices in small island contexts
Urban Expansion and Land Cover Changes in the Special Region of Yogyakarta: The Impact of Transportation and Tourist Attractions Iskandar, Zahara Sitta; Abdurrahman, Umar; Nandi, Nandi
Jurnal Pendidikan Geografi Gea Vol 25, No 2 (2025)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/gea.v25i2.85969

Abstract

This study examines the relationship between urban expansion and land cover changes in the Special Region of Yogyakarta (DIY), with a focus on the impacts of transportation infrastructure and tourist attractions. Over recent decades, rapid urbanization driven by economic growth, improved transportation networks, and expanding tourism has significantly transformed land use patterns across the province. The development of the Yogyakarta International Airport (YIA) and the improvement of road networks have been key drivers of urban sprawl, particularly in Sleman and Bantul. These areas have experienced the conversion of agricultural land into residential and commercial zones. The expansion of tourist destinations, such as Gunung Merapi and Prambanan, has further accelerated land use changes, intensifying urban growth and putting pressure on local ecosystems. This study utilizes satellite imagery and spatial regression models to examine land cover changes and their drivers, revealing that infrastructure development and the tourism sector play pivotal roles in shaping the region's landscape. The findings underscore the need for sustainable spatial planning policies to mitigate the environmental impacts of urban sprawl and ensure the long-term resilience of DIY's natural resources and cultural heritage.
Co-Authors Afriansyah Pulungan, Wira Alina, Dining Nika Anwar, Iwan Pramesti Arifin Nur, Ashadi Armando, Gali Ayi Tarya Badriana, Mochamad Riam Hutahaean, Andreas Albertino Ilham, Muhammad Naufal Iskandar, Zahara Sitta Jeon, Chungkyun Khadami, Faruq Maqbul, Ismail Miliachristi Radjawane, Ivonne Mochamad Rudyansyah Ismail Munawwar, Muhammad Nandi Nandi, Nandi Naufal Ilham, Muhammad Nining Sari Ningsih Nur, Ashadi Arifin Park, Hansan Radjawane, Ivonne Milichristi Rosma Siregar SABRINA, ELSA Safri Burhanuddin Saqina Ramadhanti, Defania Siregar, Wal Yunansyah Subiyanto Syahputra, Fahmy Syairal Fahmy Dalimunthe Totok Suprijo Yunansyah Siregar, Wal