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ANALISIS POTENSI LIKUEFAKSI PASIR PANTAI ANYER SEBAGAI SUBGRADE JALAN YANG DISTABILISASI DENGAN BAKTERI SPOROSARCINA SP Ezra Finesia Simbolon, Eva; Firia, Nisa; Amalia, Dewi; Aswin, Lim
Jurnal Jalan Jembatan Vol 42 No 1 (2025)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58499/jatan.v42i1.1315

Abstract

Earthquakes are natural disasters that can cause significant damage to infrastructure, particularly the subgrade layer, and induce secondary effects such as liquefaction. This impact phenomenon is indicated by loose soil material, such as sand, losing its strength and exhibiting a fluid-like behaviour due to specific shocks or pressures. As a result, the soil becomes unstable so that it is unable to support the load above it. The use of loose sand as a subgrade requires repair or replacement with stronger, more stable soil, which can be addressed with the proper stabilisation method. Currently, a more environmentally friendly soil stabilisation method has been found, known as bio-grouting or MICP (Microbially Induced Calcite Precipitation). This study was conducted to develop and apply Sporosarcina Sp bacteria on Anyer beach sand with four methods, including A (injection, 10 ml of bacteria), A1 (soaking, 10 ml of bacteria), B (injection, 100 ml of bacteria), and C (injection, only nutrients). The results of soil stabilisation using four methods in a 14-day incubation period can increase the CBR value of the soil by more than 40% compared to the initial condition. The CBR value of the soil, which was originally around 2.25%, became 3.156% (method A), 3.016% (method A1), and 3.367% (method B). The increase in the SF value, which was previously around 0.20-0.21, was shown after stabilisation, and the SF value was obtained with a range of 2-5.6 in methods A, A1, and B. This value has increased significantly and can reduce the potential for liquefaction in sand as a road subgrade with a depth range of 0-1 m, as shown at the research location. Kata Kunci: gempa bumi, likuefaksi, tanah pasir pantai, Sporosarcina Sp, subgrade   Keywords: earthquake, liquefaction, coastal sandy soil, Sporosarcina Sp, subgrade 
The Influence of Buton Tailing and Expanded Polystyrene (EPS) on The Shear Strength of Sandy Soil Amalia, Dewi; Gulo, Elrich Gratiawan WD; Hendry, Hendry; Kumala sari, Putu tantri; Lhwaint, Abdallh
Potensi: Jurnal Sipil Politeknik Vol. 27 No. 1 (2025): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v27i1.6415

Abstract

Buton tailings, which are a by-product of Buton asphalt, have not been optimally utilized. In fact, research shows that Buton tailings have the potential as an additive to improve soil characteristics, especially sandy soil. This study aims to analyze the effect of the addition of Buton tailings and Expanded Polystyrene (EPS) on the shear strength of sandy soil. The sandy soil used came from Padalarang, Indonesia. Tests were conducted by adding Buton tailings at 0%, 2.5%, 5%, 7.5%, 10%, and 12.5% of the soil weight, and EPS at 0.15%, 0.3%, and 0.45%. The results showed that the addition of Buton tailings increased the cohesion and shear angle of sand soil. The most significant increase occurred with the addition of 5% Buton tailings and 0.15% EPS which increased the inner shear angle by 44% from the initial condition. Based on these results, it can be concluded that the combination of Buton tailings and EPS has the potential to increase the shear strength of sand soil.
The Role of Narcism in The Detection of Financial Fraud: A Systematic Literature Review Amalia, Dewi; Tarjo, Tarjo; Muhammad, Erfan; Said, Jamaliah
AKRUAL: JURNAL AKUNTANSI Vol 15 No 1 (2023): AKRUAL: Jurnal Akuntansi
Publisher : Accounting Study Programme Faculty of Economics and Business Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jaj.v15n1.p63-76

Abstract

Introduction / Main Objectives: This article aims to map the literature review regarding financial fraud detection by analyzing narcissistic individuals when using social media. Background Problems: The writer found indications of narcissism in the literature with the keywords "the impact of narcissism using social media" and "detection of financial fraud on narcissistic behavior." The findings show that narcissism is a personality disorder characterized by excessive self-assessment, thirst for recognition, and lack of empathy. Narcissism can negatively influence individuals when uploading content on their social media. The rise of wealth-flexing content is evidence of selfish individuals trying to gain social recognition. Without realizing it, flexing range triggers destructive perceptions from other people, especially if they excessively highlight wealth items on virtual networks. Perceptions about alleged unethical behavior in financial crimes. Even though it does not have a strong correlation, these allegations of narcissistic individuals can have the potential to commit financial fraud. Novelty: The novelty of this research is how to map the literature review regarding narcissism in detecting financial fraud Research Method: This article uses the bibliometric method to describe research developments related to narcissism and financial fraud. Findings/Result: The findings presented results from an empirical review of 207 Scopus-indexed papers. The mapping results show that 40 pieces meet the criteria for an empirical study of narcissism. Conclusion: Through this bibliometric approach, the authors conclude that although there is no strong correlation, narcissistic individuals can potentially commit financial fraud.
CORPORATE SOCIAL RESPONSIBILITY DISCLOSURE IN HIGH-RISK INDUSTRIES: THE ROLE OF STANDALONE REPORTS AND FIRM CHARACTERISTICS Hidayat, Muhammad Fahrurrozi; Amalia, Dewi
Journal Economics Technology And Entrepreneur Vol 4 No 03 (2025): ECOTECHNOPRENEUR : JOURNAL ECONOMICS, TECHNOLOGY AND ENTREPRENEUR
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/ecotechnopreneur.v4i03.1622

Abstract

The issue of Corporate Social Responsibility Disclosure (CSRD) remains a concern in Indonesia, particularly in response to various environmental pollution incidents involving companies. This study aims to examine the influence of profitability, standalone report, firm size, the tenure of the board of directors, the size of the board of commissioners, the proportion of independent commissioners, and managerial ownership on CSRD in energy sector companies. The data were collected using a purposive sampling method, sourced from financial reports and/or sustainability reports published by the companies. The results of the panel data regression analysis indicate that the standalone reports and firm size have a positive effect on CSRD. The variables of profitability, tenure of the board of directors, size of the board of commissioners, independent commissioners, and managerial ownership do not have a significant effect on CSRD. Firm size and standalone report influence CSRD, in line with stakeholder and agency theoretical frameworks.
Pemanfaatan Limbah Beton dan Serbuk Batu Kapur sebagai Bahan Stabilisaasi Tanah Lunak Amalia, Dewi; Firuliadhim, Firuliadhim; Rani Betseba, Sitorus Tio; Sabila, Rifa
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1304

Abstract

Abstrak   Tanah lempung lunak sering menjadi kendala dalam pekerjaan konstruksi karena daya dukungnya rendah dan sifatnya mudah berubah akibat kadar air. Untuk mengatasi hal tersebut, penelitian ini dilakukan dengan menstabilisasi tanah menggunakan campuran serbuk batu kapur 10% dan limbah beton sebanyak 5%, 10%, dan 15% sebagai bahan alternatif ramah lingkungan. Serangkaian pengujian laboratorium seperti berat jenis, analisa ukuran butir, atterberg limit, pemadatan, california bearing ratio (CBR), dan swelling dilakukan setelah masa pemeraman selama 14 hari. Hasil menunjukkan bahwa campuran terbaik terdapat pada variasi 10% serbuk batu kapur dan 15% limbah beton. Pada variasi ini, indeks plastisitas menurun 85,90%, dari 36,60% menjadi 5,15%. Nilai CBR unsoaked meningkat 435,38%, dari 6,2% menjadi 33,2%, sedangkan nilai CBR soaked meningkat 523,66%, dari 4,65% menjadi 29%. Nilai swelling pun mengalami penurunan sebesar 89,18%, dari 6,47% menjadi 0,70%. Hasil ini membuktikan bahwa kombinasi bahan tersebut efektif memperbaiki karakteristik tanah lempung lunak.   Kata kunci: Stabilisasi, Lempung, Limbah Beton, Serbuk Batu Kapur, California Bearing Ratio   Abstract   Soft clay soils often pose challenges in construction due to their low bearing capacity and high sensitivity to moisture content. To address this issue, this study stabilized soft clay using a mixture of 10% limestone powder and concrete waste at 5%, 10%, and 15% as environmentally friendly alternative materials. Laboratory tests—including specific gravity, grain size analysis, Atterberg limits, compaction, California Bearing Ratio (CBR), and swelling—were conducted after 14 days of curing. The results showed the optimal mix was 10% limestone powder and 15% concrete waste. In this variation, the plasticity index decreased by 85.90%, from 36.60% to 5.15%. The unsoaked CBR value increased by 435.38%, from 6.2% to 33.2%, while the soaked CBR value rose by 523.66%, from 4.65% to 29%. Swelling also decreased significantly by 89.18%, from 6.47% to 0.70%. These findings confirm that the material combination effectively improves the engineering properties of soft clay soils.   Keywords: Stabilization, Clay, Concrete Waste, Limestone Powder, California Bearing Ratio
Assessment of the Pelangwot-Sedayu Lawas Floodway Capacity for Managing Floods in the Lower Bengawan Solo River Amalia, Dewi; Sumiadi, Sumiadi; Dermawan, Very; Ivan, Hans
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 15 No. 2 (2024)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2024.015.02.7

Abstract

The Pelangwot-Sedayu Lawas floodway is the main infrastructure for a flood control system in the Lower Bengawan Solo. However, frequent flooding still occurs in the Turi and Kali Tengah subdistricts of Lamongan Regency. Therefore, the number of emergency gates in the floodway has been increased. An important aspect of this flood control is ensuring that, despite the increase in capacity of the Pelangwot-Sedayu Lawas floodway gates, the water surface elevation at Pelangwot does not lead to overflow and that the floodway channel from Pelangwot to Sedayu Lawas effectively conveys the maximum discharge. This study aims to assess the capacity of the emergency gates to convey a flood discharge of 1000 m³/s and the capability of the floodway channel to accommodate flows from both the emergency gates and outlet of Jabung Retarding Basin, which amounts to 1140 m³/s. The analysis of floodway capacity involves calculating the discharge through five floodway gates and simulating the floodway channel to manage flood discharge using the HEC-RAS 5.0.7 software. Results indicate that with a gate opening of 5 m, the five gates can discharge 1000 m³/s at a water surface elevation of +7.03 masl, reducing floods by 32.09%. To improve capacity, the embankment must be elevated by 1.0 meters, with a crest width of 4.00 meters along the left bank for 4.4 km and the right bank for 4.35 km. These modifications are essential to enhance flood management and protect downstream areas.
Evaluasi Kapasitas Emergency Gate Floodway Pelangwot-Sedayu Lawas sebagai Sistem Pengendalian Banjir di Bengawan Solo Hilir Amalia, Dewi; Sumiadi, Sumiadi; Dermawan, Very
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 3 No. 1 (2023): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2023.003.01.07

Abstract

Pelangwot-Sedayu Lawas floodway is the main infrastructure of the flood control system in the lower reach of Solo River. Based on the conditions in the field, there is still often occurs flood in that area therefore it is planned to increase the design flood of 1000 m3/s. This study aimed to determine the capability of three flood emergency gates to drain flood discharge of 1000 m3/s and the capability of the flood channels to accommodate discharge from the emergency gates and Rawa Jabung of 1310 m3/s. The analysis of the emergency gate capability is carried out by calculating the discharge that can pass through the emergency gates while the analysis of the flood channel is simulated using HEC-RAS 5.0.7. The results show that with gates opening (w) of 5 m, the emergency gates can drain the design flood of 1000 m3/s, with elevation at Pelangwot +7,190 masl and the condition of the flow is free flow. The percentage of flood reduction in Solo River reached 30.265%. The existing floodway channel has not been able to drain the discharge of 1310 m3/s, so it is necessary to raise the embankment or normalize the flood channel.Floodway Pelangwot-Sedayu Lawas merupakan infrastruktur utama dalam sistem pengendalian banjir Bengawan Solo Hilir. Berdasarkan kondisi di lapangan, diketahui bahwa masih sering terjadi banjir di daerah Bengawan Solo Hilir, maka dari itu direncanakan untuk meningkatkan kapasitas debit yang akan dialirkan menuju ke floodway, yaitu sebesar 1000 m3/dt. Tujuan studi ini adalah untuk mengetahui kemampuan tiga emergency gate floodway dalam mengalirkan debit banjir 1000 m3/dt dan kemampuan saluran floodway untuk menampung debit dari emergency gate maupun dari Rawa Jabung sebesar 1310 m3/dt. Analisis kemampuan emergency gate untuk mengalirkan debit banjir dilakukan dengan menghitung kapasitas debit yang dapat dialirkan melewati tiga pintu floodway, sedangkan analisis kemampuan saluran floodway dalam menampung debit banjir disimulasikan menggunakan aplikasi HEC-RAS 5.0.7. Hasil analisis menunjukkan dengan bukaan pintu (w) 5 m, ketiga pintu floodway tersebut mampu mengalirkan debit banjir rencana 1000 m3/dt, dengan elevasi di Pelangwot adalah +7,190 mdpl, dengan  kondisi aliran yang terjadi di hulu pintu adalah aliran bebas. Persentase reduksi banjir Bengawan Solo dengan kapasita floodway 1000 m3/dt, mencapai 30,265%. Saluran floodway eksisting belum mampu mengalirkan debit 1310 m3/dt, sehingga diperlukan peninggian tanggul ataupun normalisasi pada saluran floodway tersebut.
PERBANDINGAN KARAKTERISTIK GAMBUT PALANGKARAYA YANG TELAH DISTABILISASI DENGAN BAKTERI BACILLUS SUBTILIS Khoerani, Annisa; Amalia, Dewi; Sulaiman, Suherman
Potensi: Jurnal Sipil Politeknik Vol. 25 No. 2 (2023): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v25i2.5824

Abstract

Indonesia merupakan negara dengan sebaran gambut terbanyak di Asia Tenggara. Luas lahan gambut di Indonesia mencapai 13.43 juta hektar yang tersebar di empat pulau besar di Indonesia. Pembangunan infrastruktur di lahan gambut memiliki banyak resiko karena karakteritik gambut yang buruk, seperti kadar air dan kadar serat yang tinggi, hingga daya dukung yang rendah. Oleh karena itu pada saat ini banyak penelitian yang dilakukan untuk meningkatkan karakteristik gambut berupa stabilisasi, hanya saja stabilisasi yang dilakukan banyak menggunakan bahan kimia yang dapat mencemari lingkungan. Pada dewasa ini, stabilisasi dengan bakteri dianggap lebih ramah lingkungan seperti stabilisasi dengan metode Microbially Induced Calcite Precipitation (MICP) menggunakan bakteri Bacillus subtilis. Proses stabilisasi dengan penambahan 7.5% larutan bakteri dapat meningkatkan kuat geser gambut dari 17.693 kPa menjadi 24.047 kPa. Peningkatan kuat geser pada gambut diikuti dengan perubahan karakteristiknya. Gambut yang berasal dari Kota Palangkaraya, Kalimantan Tengah memiliki karakteristik sebagai gambut berserat tipe hemic dengan kandungan abu yang tinggi kadar organik yang tinggi, tingkat keasaman yang tinggi, serta kemampuan penyerapan air yang sedang. Setelah dilakukan stabilisasi didapatkan karakteristik gambut menjadi gambut tidak berserat tipe sapric dengan kadar abu yang tinggi, kadar organik yang rendah, tingkat keasaman yang sedang, serta kemampuan penyerapan air yang rendah.
The Effect of Polyacrylamide Polymer Stabilization Soil on the Magnitude of Settlement and Stability of Bridge Approach Slabs Yuswandono, Mulyadi; Amalia, Dewi; Permana, Rahmat; Hendry; Arofah, Muhammad Bayu; Sulaiman , Raihan Maulana; Ahmed, Suliman Badawi
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 1 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i1.5840

Abstract

The main problems that often occur in embankments built on soft soil are subsidence of the subgrade and stability of the embankment. This research aims to determine the effect of applying silty clay soil stabilized by PAM on subgrade subsidence and embankment operation stability. Apart from that, this research also analyzes the effect of variations in slope on subgrade subsidence and embankment stability. Analysis uses the finite element method with Plaxis 2D V20 software. From the analysis results it is known that the use of 0.2% PAM stabilized silty clay backfill material; 0.4%; 0.6%; 0.8%; and 1% has a higher Safety Factor (SF) value than the selected embankment, where the SF increase is 28.72%; 29.90%; 30.81%; 32.75%; and 33.10%, respectively. The use of silty clay material stabilized by PAM (0.2%; 0.4%; 0.6%; 0.8%; and 1%) succeeded in reducing settlement occurring in the field respectively by 10.23%; 6.77%; 5.79%; 4.41%; and 1.09%. This means saving on the need for stockpiled materials. Variations in slope affect the decrease in the stability of the subgrade and embankments, where the smaller the slope angle, the smaller the subsidence of the subgrade and the greater the value of the embankment stability safety figure obtained.
Influence of Scouring Phenomenon on Slope Stability in Substructure Construction of Cipeles Bridge Jordy, Riskia; Amalia, Dewi; Amarta, Agastyasa Ghea
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 1 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i1.5848

Abstract

Slope stability represents a crucial aspect of terrain integrity, safeguarding against potential landslides and ensuring structural resilience. Instabilities arise primarily from diminished safety margins and landslide occurrences triggered by alterations in slope dimensions or geometry induced by river water scouring. Such scouring processes engender heightened slope steepness, exacerbating vulnerability to failure. Utilizing Finite Element Method (FEM) software, specifically Plaxis 2D Version 22, back calculation analysis, or reverse analysis, offers a robust approach to assess safety factors and collapse patterns resulting from scour-induced alterations. Our investigation reveals a pronounced expansion of slope failure zones attributable to scour phenomena, encompassing both primary and secondary scour instances. Concurrently, there is a discernible reduction in Safety Factor (SF) values and y-displacement magnitudes along the slope, with the most notable declines observed under condition 3 (displacement-y value reaches 79,53 mm). These alterations stem from geometric transformations within the slope, culminating in increased steepness and corresponding destabilization.
Co-Authors Abdallh Lhwaint, Abdallh Ahmed, Suliman Badawi Amarta, Agastyasa Ghea Antonius Siswanto ANWAR, WIWIN ARMOLDO OKTAVIANI Ariani, Windy Novita Arofah, Muhammad Bayu Asri, Muhammad Rizal Aswin, Lim Aziza, Putri Fadhilla Azizah, Zahra Fitri Chamidy, Harita Nurwahyu Chatarina Umbul Wahyuni Desiandi Sayful Anwar Dinata, Noer Fadzri Perdana Djatnika, Tjetjep Erfan Muhammad, Erfan Ery Radya Juarti, Ery Radya Ezra Finesia Simbolon, Eva Faisal Estu Yulianto, Faisal Estu Febrianti, Resty Firia, Nisa Firuliadhim, Firuliadhim Fitria, Syarifa Fitriani, Anisa Putri Githa Pratiwi, Shiwanggie Gulo, Elrich Gratiawan WD Guritno, Bagus Hatta, Fitriani Hendry . Hidayat, Muhammad Fahrurrozi Ida Sugiarti Ishaq, Ardan Maulana Ivan, Hans Jordy, Riskia Kartika, Hendira Rita Keryanti, Keryanti Khoerani, Annisa Krisologus, Yulianto Petrus Kumala sari, Putu tantri Kusuma, Yusmiati Liana Susanto Lindung Zalbuin Mase, Lindung Zalbuin Min, Joe Lian Muhammad Abu Bakar Sidik Mujiman Mujiman, Mujiman Mulyadi Yuswandono Nasution, Ade Nur Rabbiah Ni Luh Putu Hariastuti Nisrina, Ratu Salma Nursyafril, Nursyafril Permana, Adrian Dwi Pratama, Andreas Dhiyong Prayetno, Eko PUDIN, APIP Puspita, Deasy Hary Rahman Rahayu, M. Ageng Rahmat Permana, Rahmat Rani Betseba, Sitorus Tio Ruchiyat, Iman Ruchyat, Iman Sabila, Rifa Said, Jamaliah Saputri, Aisyatul Widad Setyaningrum, Dewi Janti Sihombing, Atmy Verani Rouly Sugiarto, Vito Andrianto Pratama Sukandar, Beny Mulyana Sulaiman , Raihan Maulana Sulaiman, Suherman Sumiadi, Sumiadi Suripto Suripto Tarjo Tarjo Tuty Emilia Agustina Very Dermawan WD Gulo, Elrich Gratiawan Winata, Candra Yackob Astor Yuniarwati, Yuniarwati Yuswandono, Mulyadi