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Transformation of Geospatial Modelling of Soil Erosion Susceptibility Using Machine Learning Olii, Muhammad Ramdhan; Nento, Sartan; Doda, Nurhayati; Olii, Rizky Selly Nazarina; Djafar, Haris; Pakaya, Ririn
Journal of the Civil Engineering Forum Vol. 11 No. 2 (May 2025)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.19581

Abstract

Soil erosion presents substantial environmental and economic challenges, especially in areas prone to land degradation. This study assesses the use of Machine Learning (ML) methods—Support Vector Machines (SVM) and Generalized Linear Models (GLM)—to model Soil Erosion Susceptibility (SES) in the Saddang Watershed, Indonesia. It incorporates environmental, hydrological, and topographical factors to improve prediction accuracy. The approach includes multi-source geospatial data collection, erosion inventory mapping, and relevant factor selection. SVM and GLM were applied to classify SES, with performance evaluated using accuracy, AUC, and precision metrics. Results show SVM classified 40.59% of the area as moderately susceptible and 38.50% as low susceptibility. GLM identified 24.55% as very low and 38.59% as low susceptibility. Both models demonstrated high accuracy (SVM: 87.4%, GLM: 87.2%) and strong AUC values (SVM: 0.916, GLM: 0.939), though GLM showed better specificity and recall. Feature importance analysis highlights that GLM favors hydrological factors like river proximity and drainage density, while SVM balances across various environmental inputs. These findings affirm the value of ML-based geospatial modeling for SES assessment, supporting interventions such as reforestation and erosion control. SVM is suitable for localized planning, whereas GLM offers strategic-level insights. This research contributes to advancing environmental modeling by embedding domain knowledge into ML frameworks, and suggests future work integrate real-time remote sensing and more sophisticated models for broader SES prediction.
Evaluasi Sistem Informasi Menggunakan Model HOT-FIT Pada Sistem Penerimaan Mahasiswa Baru di Lingkungan Universitas Muhammadiyah Gorontalo Syahrial, Syahrial; Larote, Yonis; Lasarudin, Alter; Olii, Muhammad Ramdhan
Jurnal Ilmu Komputer (JUIK) Vol 4, No 2 (2024): JUNE 2024
Publisher : Universitas Muhammadiyah Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31314/juik.v4i2.3315

Abstract

This research was conducted to evaluate the website for new student admissions at the Universitas Muhammadiyah Gorontalo. Evaluation was carried out by applying the HOT-Fit model method to 4 components. Focus evaluation on technological, human, organizational and benefits components. The aim is to determine the level of usability of the Universitas Muhammadiyah Gorontalo New Student Admissions System. The research method was carried out quantitatively by collecting questionnaire data from the committee and registrants. The HOT-Fit model is applied in determining system evaluation indicators. The results of the HOT-Fit model approach on 8 variables are good. There is a test value for System Quality (KS) with a value of 73.8 (Good), then Service Quality (KL) with a value of 82.0 (Very Good), then Information Quality (KI) with a value of 72.3 (Good), then System Usage (PS) with a value of 77.9 (Good), then User Satisfaction (KP) with a value of 74.2 (Good), then Organizational Environment (LO) with a value of 82.7 (Very Good), then Organizational Structure (SO ) with a score of 66.7 (Good), and System Benefits (MS) with a score of 82.2 (Very Good). Categories in 8 variables are good to use based on the HOT-Fit method with a value obtained of 76.5. The Usability Testing results are good for use based on the HOT-Fit method and the assessment of new students as respondents.
Enhancing Compressive Strength of Self-Compacting Concrete (SCC) through Rice Husk Ash and Superplasticizer Incorporation Olii, Muhammad Ramdhan; Ali, Azhar Zukur Putra M.; Djau, Rahman Abdul; Doda, Nurhayati; Olii, Rizky Selly Nazarina
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.611

Abstract

The increasing demand for sustainable construction materials has encouraged the utilization of alternative materials, such as rice husk ash (RHA), and the use of chemical admixtures like superplasticizers in self-compacting concrete (SCC). This study aims to evaluate the effects of RHA and superplasticizer incorporation on the fresh and hardened properties of SCC, focusing on flowability, segregation resistance, and compressive strength. The experimental program involved three SCC mixtures: normal concrete, and SCC with 4% and 8% RHA and superplasticizer by cement weight. Fresh concrete properties were assessed using the slump flow, V-Funnel, and L-Box tests, while compressive strength tests were conducted on cube specimens after 28 days of curing. The results indicated that the addition of 4% RHA and superplasticizer enhanced the compressive strength to 34.02 MPa and maintained flowability within the specified limits, with an average slump flow diameter of 675–697 mm, V-Funnel time of 7.35–8.72 seconds, and L-Box ratio of 0.84–0.85. However, the 8% RHA mixture exhibited a decline in compressive strength (28.51 MPa), highlighting the detrimental effects of excessive superplasticizers on particle cohesion. Furthermore, the use of RHA reduced concrete density, showcasing its potential for lightweight construction applications. These findings confirm that a 4% RHA and superplasticizer dosage optimizes SCC performance, supporting sustainable construction through resource-efficient and durable materials. The study underscores the need for precise mix designs and suggests broader applications of RHA and chemical admixtures in advancing green concrete technologies.
OPTIMALISASI KUAT TEKAN BETON GEOPOLIMER MENGGUNAKAN FLY ASH DAN ABU SEKAM PADI Olii, Muhammad Ramdhan; Mangewa, Novia; Abdul Djau, Rahman; Nento, Sartan; Zailani Olii, Abdul Kadir
JURNAL TEKNIK SIPIL CENDEKIA (JTSC) Vol 6 No 2 (2025): July
Publisher : Departement of Civil Engineering, Universitas Winaya Mukti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51988/jtsc.v6i2.286

Abstract

Beton merupakan material konstruksi yang banyak digunakan, namun dampak lingkungan yang ditimbulkan, terutama dalam hal emisi CO?, mendorong pencarian alternatif yang lebih ramah lingkungan. Beton geopolimer, yang memanfaatkan fly ash dan abu sekam padi sebagai bahan pengikat, dapat menjadi solusi yang menjanjikan untuk menggantikan beton konvensional. Penelitian ini bertujuan untuk mengkaji pengaruh variasi komposisi fly ash dan abu sekam padi terhadap sifat mekanis dan workability beton geopolimer. Variasi campuran yang digunakan terdiri dari proporsi fly ash dan abu sekam padi sebesar 100:0, 80:20, 70:30, dan 50:50, dengan larutan alkali aktivator NaOH 12M dan Na?SiO? dengan rasio 1:2,5. Hasil penelitian menunjukkan bahwa campuran dengan 100% fly ash menghasilkan kuat tekan tertinggi, yaitu 23,13 MPa, dan nilai slump 8,0 cm, yang mengindikasikan kinerja beton yang baik dalam hal kekuatan dan workability. Sebaliknya, peningkatan proporsi abu sekam padi menyebabkan penurunan kuat tekan dan slump, dengan nilai terendah pada campuran 50% abu sekam padi, yang menghasilkan kuat tekan 17,20 MPa dan nilai slump 5,5 cm. Berdasarkan hasil ini, dapat disimpulkan bahwa fly ash tetap menjadi bahan pengikat utama yang lebih baik untuk beton geopolimer, sementara abu sekam padi dapat digunakan dalam proporsi terkendali untuk mendukung keberlanjutan lingkungan. Penelitian lanjutan disarankan untuk mengeksplorasi penggunaan bahan tambahan lainnya dan melakukan analisis mikrostruktur untuk meningkatkan performa beton geopolimer.
ANALISIS KARAKTERISTIK BETON MENGGUNAKAN TEMPURUNG KELAPA PENGGANTI SEBAGIAN AGREGAT KASAR DENGAN MUTU FC 20 MPA Nento, Sartan; Abdullah, Julius Tri Octavian R.; Doda, Nurhayati; Olii, Muh. Ramdhan; Djau, Rahman A
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 10 No. 2 (2022): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

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

Abstract

Abstrak: Analisis Karakteristik Beton Menggunakan Tempurung Kelapa Pengganti Sebagian Agregat Kasar Dengan Mutu Fc 20 MPA. Teknologi bahan serta teknik-teknik pelaksanaan yang diperoleh dari hasil penelitian dan percobaan dimaksudkan untuk menjawab tuntutan yang semakin tinggi terhadap pemakaian beton serta mengatasi kendala-kendala yang sering terjadi pada pengerjaan di lapangan. Peningkatan mutu beton dapat dilakukan dengan memberikan bahan ganti atau bahan tambah, Salah satu bahan alternatif yang dapat digunakan sebagai bahan pengganti yaitu pecahan tempurung kelapa. Penelitian ini bertujuan untuk mengetahui karakteristik, nilai kuat tekan beton pada umur 28 hari yang telah menggunakan pecahan tempurung kelapa pengganti sebagian agregat kasar pada kadar 3%, 5.5%, 7.5%, 9.5% dan 11.5%. Pengumpulan data dilakukan dengan uji Laboratorium berdasarkan SNI 2012. Analisis data dilakukan dengan menghitung rata-rata hasil pengujian kemudian dibandingkan dengan SNI-7656 2012. Dari hasil penelitian pada kadar 3% tempurung kelapa didapatkan nilai kuat tekan 20.66 MPA di bandingkan dengan kuat tekan beton normal rencana menurut SNI 7656: 2012 yaitu 20 MPA mengalami kenaikan sebesar 3.3%. Jadi dengan menggunakan Pecahan tempurung kelapa sebagai bahan pengganti sebagian agregat kasar pada campuran beton dapat menghasilkan nilai kuat tekan beton lebih tinggi daripada kuat tekan yang direncanakan. Kata kunci :Tempurung Kelapa; Agregat Kasar; Beton Abstract: Analysis of Concrete Characteristics Using Coconut Shell as Partial Substitute for Coarse Aggregate with Fc Quality 20 MPA. Material technology and implementation techniques obtained from the results of research and experiments are intended to answer the increasingly high demands on the use of concrete and overcome obstacles that often occur in field work. Improving the quality of concrete can be done by providing substitute materials or added materials. One alternative material that can be used as a substitute is coconut shell fragments. This study was conducted to determine the characteristics of the compressive strength of concrete at the age of 28 days using coconut shell fraction as a partial replacement for coarse aggregate at levels of 3%, 5.5%, 7.5%, 9.5% and 11.5%. Data collection was carried out by laboratory tests based on SNI 2012. Data analysis was carried out by calculating the average test results and then compared with SNI-7656 2012. From the results of the study at the level of 3% coconut shell, the compressive strength value of 20.66 MPA was compared with the compressive strength of normal concrete. The plan according to SNI 7656: 2012 which is 20 MPA increased by 3.3%. Therefore, by using coconut shell fragments as a partial substitute for coarse aggregate in the concrete mixture, it can produce a higher compressive strength value of concrete than the planned compressive strength. Keywords: coconut shell; Coarse Aggregate; Concrete
PERENCANAAN GEDUNG RAWAT INAP RS MM DUNDA MENGUNAKAN SOFTWARE SAP 2000 Nento, Sartan; Otto, Abdul Rajab; Olii, Muh Ramdhan; Olii, Aleks; Doda, Nurhayati
RADIAL : Jurnal Peradaban Sains, Rekayasa dan Teknologi Vol. 11 No. 2 (2023): RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi
Publisher : Universitas Bina Taruna Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37971/radial.v11i2.413

Abstract

This research aims to analyze the structural analysis of a building using software Since computerization is used to complete every building plan or design, the development of technology and information, especially computerization in the world of construction, cannot be separated anymore and is not a new phenomenon. The decision to use a computer to complete construction plans was based on the fact that computers have the advantage of not only being able to finish quickly but also having accuracy, effectiveness, and ease of use (Dwi Deshariyanto, Anita Intan Nura Diana 2021). The following findings have been achieved based on the final results of the development of this final report. using the SAP 2000 version 22 program to calculate reinforcement in columns, beams, and floor slabs, Using earthquake response spectrum design analysis, earthquake load calculations refer to SNI 1726: 2019 (Procedures for Planning Earthquake Resistance for Buildings and Non-Buildings), The design of this building is based on the type of reinforced concrete structure and the Unique Moment Resisting Frame System (SRPMK). The floor difference is in accordance with the relevant SNI criteria
ENVIRONMENTALLY FRIENDLY CONCRETE USING WASTE GLASS POWDER (WGP) AS A PARTIAL SUBSTITUTE OF CEMENT Olii, Muhammad Ramdhan; Sahrul Hidayat, Andi; Saliko, Maxidin; Santoso, Triyadi; Hippy, Mohamad Alfandi; Pakaya, Ririn
JURNAL TEKNIK SIPIL Vol 12, No 2 (2023): Volume 12 Nomor 2 November 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v12i2.32883

Abstract

The utilization of waste materials in concrete production is gaining significant attention as a means to mitigate environmental issues and promote sustainable construction practices. This study investigates the potential of waste glass powder (WGP) as a partial replacement for cement in concrete. The aim is to evaluate the effects of WGP on the properties and performance of concrete, with a focus on enhancing sustainability and reducing the environmental impact associated with cement production. The experimental investigation involved preparing concrete mixtures with varying proportions of WGP, ranging from 10% to 25%, as a partial replacement for cement. Based on the research findings, it can be concluded that the substitution of 20%WGP) for cement is the optimal dosage. The results of various tests and evaluations show that the concrete has desirable properties and performance characteristics at this level of replacement. This 20% substitution ratio strikes a balance between maintaining adequate compresive strength and improving the concrete's sustainability. In conclusion, the incorporation of WGP as a partial replacement for cement in concrete shows promises as an environmentally friendly and sustainable approach. Further research and optimization of mix proportions are recommended to maximize the benefits of utilizing WGP in concrete and promote its widespread application in the construction industry.
Compressive Strength Performance of Rice Husk Ash-Based Geopolymer Concrete with Fly Ash as a Secondary Material Olii, Muhammad Ramdhan; Saliko, Maxidin; Doda, Nurhayati; Nento, Sartan; Olii, Rizky Selly Nazarina
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.259-266

Abstract

Concrete production heavily relies on cement, whose manufacturing significantly contributes to carbon emissions, necessitating alternative materials for sustainable construction. This study investigates the effect of varying compositions of rice husk ash (RHA) and fly ash on the compressive strength and workability of concrete. Five variations of RHA and fly ash ratios (80:20, 75:25, 70:30, 65:35, and 60:40) were tested to identify the optimal mixture. The results show that the 60:40 ratio produced the highest compressive strength of 16.66 MPa and a slump value of 9.5 cm, indicating enhanced workability and mechanical performance. This finding highlights the complementary roles of RHA, which contributes to pozzolanic activity, and fly ash, which enhances hydration and cementitious properties. Excessive RHA content, however, leads to reduced strength due to its lower reactivity. The exponential trend observed in the compressive strength characteristics (R² = 0.9081) confirms the nonlinear relationship between material composition and performance. This research aligns with previous studies demonstrating the benefits of using industrial by-products in concrete. The findings underscore the potential of combining RHA and fly ash as an eco-friendly solution for high-strength concrete, promoting waste utilization and sustainability in the construction industry. Future studies should explore long-term durability and scaling for industrial applications.
LIMBAH KACA SEBAGAI PENGANTI SEBAGIAN AGREGAT HALUS UNTUK BETON RAMAH LINGKUNGAN Olii, Muhammad Ramdhan; E.Poe, Isran; Ichsan, Ilyas; Olii, Aleks
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 1 (2021): Maret 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i1.407

Abstract

Abstrak Limbah kaca menyebabkan masalah lingkungan yang kronis karena sangat sulit terurai di dalam tanah. Kaca banyak digunakan dalam kehidupan sehari-hari melalui produk manufaktur seperti kaca lembaran, botol, dan barang pecah belah. Kaca adalah bahan yang berpotensi besar untuk didaur ulang. Penggunaan kaca daur ulang membantu dalam penghematan energi dan perbaikan lingkungan. Meningkatnya kesadaran akan daur ulang kaca mempercepat perubahan penggunaan limbah kaca dengan bentuk berbeda di berbagai bidang. Salah satu kontribusinya yang signifikan adalah pada bidang konstruksi dimana limbah kaca digunakan kembali untuk produksi beton. Sifat-sifat beton yang mengandung limbah kaca sebagai agregat halus diteliti dalam penelitian ini. Limbah kaca digunakan sebagai pengganti sebagian agregat halus pada campuran beton 20%, 40%, 60%, 80% dan 100%. Kuat tekan beton umur 3, 7, 14, 21 dan 28 hari dibandingkan dengan beton yang dibuat dengan agregat halus alami (beton normal). Hasil tersebut membuktikan bahwa kekuatan tertinggi diberikan oleh limbah debu kaca setelah 28 hari. Kuat tekan benda uji dengan variasi limbah kaca 20% dan 40% memiliki kuat tekan melebihi dari kuat tekan rencana (24,95Mpa), masing-masing 26,290Mpa dan 25,602 Mpa atau melebihi 5,4% dan 2,6%. Jika dibandingkan dengan kuat tekan rata-rata beton dan beton karakteristik beton normal, semua variasi limbah kaca mengalami penurunan. Di masa depan, penggunaan limbah kaca dalam beton ramah lingkungan akan memberikan dampak yang baik untuk konservasi sumber daya alam. Kata kunci: Kaca, beton, kuat tekan, ramah lingkungan.  AbstractGlass waste causes chronic environmental problems because it is very difficult to decompose in the soil. Glass is widely used in everyday life through manufactured products such as flat glass, bottles and glassware. Glass is a material with great potential for recycling. The use of recycled glass helps in saving energy and improving the environment. Increasing awareness of glass recycling is accelerating the change in the use of different forms of glass waste in various fields. One of its significant contributions is in the construction sector where glass waste is reused for concrete production. The properties of concrete containing glass waste as fine aggregate were investigated in this study. Glass waste is used as a partial replacement for fine aggregate in 20%, 40%, 60%, 80% and 100% concrete mixtures. The compressive strength of concrete aged 3, 7, 14, 21 and 28 days was compared with concrete made with natural fine aggregate (normal concrete). These results prove that the highest strength is given by the waste glass dust after 28 days. The compressive strength of the test specimens with variations of glass waste of 20% and 40% had compressive strength exceeding the design compressive strength (24.95MPa), respectively 26.290MPa and 25.602MPa or exceeding 5.4% and 2.6%. When compared with the average compressive strength of normal concrete and compressive strength of normal concrete characteristics, all variations of glass waste have decreased. In the future, the use of glass waste in environmentally friendly concrete will have a good impact on the conservation of natural resources. Keywords: Glass, concrete, compressive strength, environmentally friendly.
Kajian Penyusunan UKL UPL pada Pekerjaan Revitalisasi Pasar Tolango Kabupaten Gorontalo Utara Olii, Muhammad Ramdhan; Pakaya, Ririn; Olii, Aleks
Insan Cita : Jurnal Pengabdian Kepada Masyarakat Vol 2, No 2 (2020): Agustus 2020 - Insan Cita Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (786.793 KB) | DOI: 10.32662/insancita.v2i2.1125

Abstract

Pasar merupakan komponen terpenting dalam menggerakkan roda perekonomian masyarakat dan mendukung kelancaran logistik dan distribusi bahan kebutuhan masyarakat di daerah-daerah. Revitalisasi Pasar Tolango merupakan amanat dari Undang-undang nomor 7 tahun 2014 tentang perdagangan dan salah satu program nasional oleh Presiden dan Kementerian Perdagangan RI dalam merevitalisasi atau membangunan 5.000 pasar di seluruh Indonesia. Sehubungan dengan adanya Rencana Revitalisasi Pasar Tolango, maka diperlukan informasi yang akurat dan mampu menggambarkan kondisi sumber daya alami dan lingkungan hidup sebelum pasar tersebut dibangun. Hal ini dilakukan untuk mengantisipasi dampak yang akan terjadi setelah beroperasinya pasar, baik aspek lingkungan, sosial ekonomi dan budaya, dan aspek kesehatan yang secara keseluruhan dapat mempengaruhi masyarakat yang berada di sekitar lokasi pasar maupun di Kecamatan Anggrek pada umumnya. Metode yang digunakan berdasarkan metode rapid appraisal berbasis matriks interaksi Leopod dengan format berdasarkan Peraturan Menteri Lingkungan Hidup dan Kehutanan Republik Indonesia Nomor P.26/MENLHK/SETJEN/KUM.1/7/2018 Tentang Pedoman Penyusunan dan Penilaian Serta Pemeriksaan Dokumen Lingkungan Hidup Dalam Pelaksanaan Pelayanan Perizinan Berusaha Terintegrasi Secara Elektronik. Kajian ini dapat memeberikan gambaran kebijakan pengelolaan dan pemantauan lingkungan hidup di sekitar lokasi pembangunan pasar dan menjadi pedoman stake holder dan masyarakat dalam memelihara lingkungan hidup di sekitar Pasar Tolango.