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All Journal Media Teknik Sipil REKA INTEGRA Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Mahasiswa Jurusan Teknik Sipil Journal of Degraded and Mining Lands Management Jurnal Pembangunan dan Alam Lestari Rekayasa Sipil Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Geo-Image Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JEPA (Jurnal Ekonomi Pertanian dan Agribisnis) eCo-Buss Indonesian Journal of Social and Environmental Issues (IJSEI) International Journal of Community Service & Engagement Journal of Business and Management Inaba Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital
Arief Rachmansyah
Jurusan Teknik Sipil Fakultas Teknik Universitas Brawijaya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences

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PERBANDINGAN EFEKTIFITAS VARIASI VOLTASE PADA INJEKSI LARUTAN ELEKTRO KIMIA BaSO4 TERHADAP KUAT GESER DAN POTENSI PENGEMBANGAN TANAH EKSPANSIF Karl Raffeelino Y.H, Raynard; Zaika, Yulvi; Rachmansyah, Arief
Jurnal Mahasiswa Jurusan Teknik Sipil Vol. 1 No. 2 (2025): Student Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Brawijaya

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

Abstract

PERBANDINGAN EFEKTIFITAS VARIASI VOLTASE PADA INJEKSI LARUTAN ELEKTRO KIMIA BaSO4 TERHADAP KUAT GESER DAN POTENSI PENGEMBANGAN TANAH EKSPANSIF (Comparison of the Effectiveness of Voltage Variations in the Injection of BaSO4 Electrochemical Solutions on the Shear Strength and Swelling Potential of Expansive Soil) Raynard Karl Raffeelino Y.H., Yulvi Zaika, Arief Rachmansyah Departemen Teknik Sipil, Fakultas Teknik, Universitas Brawijaya Jalan MT. Haryono 167, Malang 65145, Jawa Timur, Indonesia Email : haryanto.raynard@gmail.com   ABSTRAK Pada tahun 1939, Cassagrande membuktikan bahwa ketika elektrokinetik diterapkan terhadap tanah berbutir halus yang memiliki kelembaban tinggi, tanah akan mengalami peningkatan tekanan efektif dikarenakan oleh tekanan air pori. Mulai saat itu, beberapa negara di Eropa telah menggunakan metode ini dalam memperbaiki tanah berbutir halus. Tujuan dari penelitian ini adalah untuk memperbaiki masalah pada tanah lempung muai dan mengetahui pengaruh fluktuasi tegangan terhadap kuat geser dan kembang pada tanah lempung muai dengan menggunakan metode injeksi larutan elektrokimia. Injeksi larutan elektrokimia adalah tindakan yang dilakukan dengan memanfaatkan fenomena elektroosmosis (pergerakan air melalui bahan padat dalam medan listrik) atau aliran larutan polarisasi dikarenakan perbedaan potensial/arus listrik. Larutan yang digunakan dalam penelitian ini adalah BaSO4 dengan konsentrasi 10% dan perubahan tegangan 12 volt, 15 volt, 18 volt, dan 24 volt. Sampel tanah ditempatkan dalam kotak uji berukuran 150 x 150 x 500 milimeter. Injeksi larutan elektrokimia dilakukan selama 7 hari. Pada penelitian ini ditemukan bahwa variasi perubahan tegangan selama penginjeksian pada tanah lempung yang diperluas mampu meningkatkan nilai kuat geser yang didapatkan dari uji triaksial yaitu dengan meningkatkan tegangan yang diterapkan, nilai kohesi tanah akan  mengalami peningkatan. Hasil pengujian kuat geser sayap menunjukkan bahwa nilai kuat geser setelah dilakukan injeksi sebesar 1,65 kg/cm2 yang mengalami peningkatan dibandingkan dengan nilai kuat geser sebelum injeksi. Uji konsolidasi membuktikan bahwa sampel tanah setelah injeksi menunjukkan kemungkinan terjadinya penurunan nilai Cs tanah sebelum injeksi yaitu 0,03 berubah menjadi 0,017 setelah injeksi. Selain itu, uji kembang bebas menunjukkan hasil yang sama yaitu potensi kembang turun dari 46,67% tanah asli menjadi 12,90% tanah sampel setelah injeksi. Kata kunci: Injeksi larutan elektrokimia, larutan BaSO4, tanah ekspansif, kuat geser, potensial kembang ABSTRACT In 1939, Cassagrande demonstrated that when electrokinetics was applied to fine-grained soil with high moisture content, the soil would experience an increase in effective pressure due to pore water pressure. Since then, several European countries have used this method to improve fine-grained soil. The purpose of this study was to improve the problem of expanding clay soil and to determine the effect of stress fluctuations on the shear strength and swelling of expanding clay soil using the electrochemical solution injection method. Electrochemical solution injection is an action carried out by utilizing the phenomenon of electroosmosis (the movement of water through a solid material in an electric field) or the flow of a polarized solution due to a difference in potential/electric current. The solution used in this study was BaSO4 with a concentration of 10% and voltage changes of 12 volts, 15 volts, 18 volts, and 24 volts. The soil samples were placed in a test box measuring 150 x 150 x 500 millimeters. The electrochemical solution injection was carried out for 7 days. This study found that variations in stress changes during injection into expanded clay soil can increase the shear strength values obtained from triaxial tests. This means that increasing the applied stress increases the soil cohesion value. The wing shear strength test results showed that the shear strength value after injection was 1.65 kg/cm2, an increase compared to the shear strength value before injection. Consolidation tests demonstrated that the soil sample after injection showed a possible decrease in the Cs value of the soil before injection, from 0.03 to 0.017 after injection. Furthermore, the free swelling test showed the same results, with the swelling potential decreasing from 46.67% of the original soil to 12.90% of the sample soil after injection. Keywords: Electrochemical solution injection, BaSO4 solution, expansive soil, shear strength, swelling potential
Pengaruh Kompensasi dan Motivasi Kerja Terhadap Kinerja Karyawan Pada Bank BJB Cabang Tamansari Bandung Novitasari, Dian; Rachmansyah, Arief
eCo-Buss Vol. 8 No. 1 (2025): eCo-Buss
Publisher : Komunitas Dosen Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32877/eb.v8i1.2907

Abstract

Pencapaian kinerja optimal dalam suatu entitas bisnis sangat ditentukan oleh kapasitas dan kompetensi individu yang terlibat di dalamnya. Dalam upaya meningkatkan kinerja karyawan, perusahaan menerapkan berbagai strategi seperti pemberian kompensasi dan peningkatan motivasi kerja. Tujuan kajian ini adalah mengkaji keterkaitan antara kompensasi serta motivasi kerja dengan tingkat kinerja karyawan di Bank BJB Cabang Tamansari Bandung. Pendekatan kuantitatif menggabungkan metode deskriptif serta metode asosiatif. Proses pengumpulan data melalui penyebaran kuesioner kepada 50 responden Data kemudian diolah dan dianalisis secara statistik menggunakan perangkat lunak SPSS versi 25. Variabel kompensasi tidak berkontribusi signifikan pada kinerja karyawan, ditunjukkan oleh nilai t hitung < t tabel (1,335 < 1,677) dengan signifikansi 0,188. Sebaliknya, variabel motivasi berkontribusi positif dan signifikan pada kinerja, dengan t hitung > t tabel (4,880 > 1,677) dan signifikansi < 0,001. Kompensasi dan motivasi secara bersama-sama berkontribusi signifikan pada kinerja karyawan, dengan nilai F hitung sebesar 19,952 > 3,20 dan nilai signifikansi < 0,001. Nilai koefisien determinasi (R²) sebesar 0,459 menunjukkan bahwa 45,9% variasi kinerja karyawan dipengaruhi oleh kompensasi dan motivasi, sedangkan sisanya dipengaruhi oleh variabel lain. Berdasarkan temuan tersebut, perusahaan disarankan untuk lebih memfokuskan upaya peningkatan motivasi karyawan sebagai strategi utama dalam mendorong peningkatan kinerja.
Effect of hydroseeding media materials on soil stability from landslide sites Zairina, Anisa; Soemarno, Soemarno; Rachmansyah, Arief; Yanuwiadi, Bagyo; Leksono, Amin Setyo
Journal of Degraded and Mining Lands Management Vol. 12 No. 5 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.125.8635

Abstract

Landslides can cause soil and land quality degradation. Soil originating from landslide sites has less stable aggregates because it is nutrient-poor. This study aimed to evaluate the effect of hydroseeding media materials on soil stability after landslides. This study was conducted in two landslide areas in Pujon District, Malang Regency (112.417958 E, 7.867472 S) and toll road KM 78 Purwodadi, Pasuruhan Regency (112.726777 E, 7.804978 S), East Java. Soil analysis was carried out with parameters including soil physical characteristics data (bulk density, specific gravity, water content, porosity, texture and permeability) and soil chemical characteristics (organic matter, organic C, N, P, K, pH, CEC, exchangeable K, Na, Ca, Mg, total N and C/N ratio). The application of hydroseeding media was carried out with a combination of the following media: mulch (M), blotong (B), and fertilizer (cow manure; F). The results showed that the two-material formula generally had soil aggregates that were more resistant to water droplets. Soil aggregates with the MB formula treatment had the best aggregate stability compared to ten hydroseeding formulas with other material combinations.
IMPACT OF COAL MINING IN FOREST AREA TO CARBON EMISSION IN KUTAI KARTANEGARA, EAST KALIMANTAN Kartikasari, Retna; Rachmansyah, Arief; Leksono, Amin Setyo
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 9 No 4 (2019): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.9.4.1066-1074

Abstract

Coal mining is an activity that contribute to greenhouse gas emissions, both from methane gas release of coal trap and the loss of lan cover plants. This study was conducted to estimate carbon emissions in coal mining areas inside forest areas by analyzing changes in landcover. The area of this study is Kutai Kartanegara Regency, East Kalimantan, where coal mining activities are quite massive. To obtain the extent of changes in land cover and the amount of carbon emissions in the area, analysis of Landsat 5 TM and Landsat 7 ETM+ imagery in 2010 and also the 2016 Landsat 8 OLI / TIRS imagery was used. The results showed that in the area of study there was a change in landcover of 12,663.28 Ha in the forest areas used for coal mining activities. Carbon emissions generated from this activity amounted to 0.60 Mton CO2-Eq
IDENTIFIKASI STRUKTUR GEOLOGI DAN PENGARUHNYA TERHADAP SUHU PERMUKAAN TANAH BERDASARKAN DATA LANDSAT 8 DI LAPANGAN PANASBUMI BLAWAN Azhari, Anjar Pranggawan; Maryanto, Sukir; Rachmansyah, Arief
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 13 No. 1 (2016)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/inderaja.v13i1.3316

Abstract

This paper presents the use of remote sensing methods for identifying geological structures on the Blawan-Ijen geothermal field and its system. Remote sensing data, specifically Landsat 8 and DEM SRTM, were utilized to extract lineaments from the 753 multispectral band and derive land surface temperature (LST) from a single thermal infrared band using a retrieval method. Surface emissivity was determined based on the Normalized Difference Vegetation Index (NDVI) of the study area. Remote sensing analysis proved to be an effective approach for identifying geological structures from the surface that control thermal manifestations in the Blawan geothermal field. The results indicate that the Blawan fault is the primary structure in the geothermal field, associated with high LST and hot springs. Interpretation suggests that the reservoir of the Blawan-Ijen geothermal system extends from Plalangan to the southwest area.
Sustainability Analysis of Farming Roads for Increased Food Security (Case Study on Woro Village, Kepohbaru Subdistrict, Bojonegoro Regency) Lestari, Puji; Rachmansyah, Arief; Efani, Anthon; Koentjoro, Maharani Pertiwi
Jurnal Penelitian Pendidikan IPA Vol 9 No SpecialIssue (2023): UNRAM journals and research based on science education, science applic
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9iSpecialIssue.6420

Abstract

Villages are often serve as primary centers for agricultural activities and play a crucial role as the main supporters of national food security. Numerous efforts have been undertaken to food security, with the development of farm road infrastructure being one significant initiative. The village government, aligning with its commitment to support the national program, initiated out the construction of farm roads in 2021-2022. This research explores the sustainability of farm road development with the objective of enhancing agricultural productivity, examining five pillars: environment, social aspects, economic considerations, institutional dimension, and law enforcement. The case analysis on Woro Village in the Kepohbaru District, Bojonegoro Region.A quantitative research methodology was employed, collecting data through a questionnaire distributed to 84 respondents who are members of the village community. The data analysis employed Structural Equation Modeling - Partial Least Squares (SEM-PLS) using SMartPLS 4.0 software. The result is indicated by the path-coefficient values of 0.286; 0.294; 0.351; 0.174; and 0.131; with corresponding t-statistic values of 3.746; 2.517; 3.108, 2.154, and 2.393. The associated p-values were 0.00; 0.012; 0.002; 0.031; and 0.017; respectively. The research findings highlight a notable and positive impact stemming from the five development pillars, namely environment, social, economic, institutional, and law enforcement, on the sustainability of agriculture road development.
Community Perception on Flats Development as a Living House in Urban Area, Singosari Sub-District, Malang Regency Halim, Lusiani Ferelia; Rachmansyah, Arief; Soemarno, Soemarno
Jurnal Pembangunan dan Alam Lestari Vol. 16 No. 2 (2025): Jurnal Pembangunan dan Alam Lestari
Publisher : Postgraduate School of Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpal.2025.016.02.06

Abstract

The increase in land limitation as a living space triggered the higher price in the Malang area, thus becoming unaffordable for low-income communities. This problem causes the shift of land choices to the border area, as happened in the Singosari sub-district. But unfortunately, the trend of housing as a current model of housing development will impact the reduction of land space, land conversion, slums, reduced water catchment area, etc. The development of flats is considered to be more appropriate for the sustainable development concept. This study aims to determine the community interest and to know the level of economic affordability for the development of a flats model, especially for low-income communities in Singosari. To support this research, we made 2 designs of flat buildings. This research was conducted at Bumi Mondoroko Raya housing (37.62 Ha). This housing focuses on providing living housing for low-income communities.  We use a descriptive qualitative method and quantitative methods through the distribution of questionnaires. The result shows that the community can not accept the house with the flats model, although they can reach the selling price of flats as 95.24% economically by utilizing the subsidized mortgage for 20 years. Keywords: Flats, Low Income Community, Interest
Navigating Organizational Change In Streaming Platforms: A Systematic Literature Review Rachmansyah, Arief; El Khaldi, Malika
Journal of Business and Management Inaba Vol. 4 No. 2 (2025): Volume 4 Number 2, December 2025
Publisher : Universitas Indonesia Membangun (Inaba)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56956/jbmi.v4i2.501

Abstract

Despite the rapid growth and disruption introduced by streaming platforms in the media industry, little is known about how these organizations experience and manage internal change. Organizational change in this context is driven by evolving technologies, audience behaviors, and competitive dynamics. To better understand how streaming platforms navigate such change, a systematic literature review is conducted. We categorize existing research into major themes, including strategic adaptation, structural transformation, and innovation capabilities. We analyze the core characteristics of organizational change within streaming services, discuss theoretical and practical challenges, and highlight implications for both scholars and industry leaders. Finally, we propose future research directions to deepen our understanding of change management in digital platform environments.
Co-Authors A.A. Ketut Agung Cahyawan W Aditya, Tri Destian Afifuddin, Annas Agung, Annisa Tri Kurnia Agus Suharyanto Agustia, Daffa Fadhiel Aji, Muhammad Satria Bayu Akbarrina, Ailia Rizky Akhmad Afandi Al Islami, Auliya Nusyura Alfi Syahr, Enrico Widy Alfianto, Galih Alwafi Pujiraharjo Amin Setyo Leksono Aminudin Afandhi Andrianto, Haris Anisa Zairina Anjar Pranggawan Azhari Ansor, Zakaria Al Anthon Efani Ardiyansari, Anisa Oktavia Asyifa, Hira Atikah, Laras Bagyo Yanuwiadi Bambang Semedi Bangalino, Arvi Bayuaji, Gerardus David Ady Purnama Chandra, Farhan Prima Darmawan, Wahid Dharmawan, Aditya Leo Dian Novitasari Dirman, Eris Nur Diza, Novia Fara Eko Andi Suryo El Khaldi, Malika Fadh, Ghulam Aghnia Faradita, Putri Agil GITA PERMATA LIANSARI Halim, Lusiani Ferelia Harimurti . Haristama, Iffat Shafwan Harsuko Riniwati Hidayat, Mahesa Hikmawati, Viona Faiqoh Hutama Putra, Made Dwika imaniyah, rifatul Indradi Wijatmiko Iswardhana, Fanny Pramudya Karimah, Maslin Akhlaqul Karl Raffeelino Y.H, Raynard Kartikasari, Retna Ludfi Djakfar M. Hamzah Hasyim Machsusiyah, Firanda Nuriszatul Maharani Pertiwi Koentjoro Marjono Marjono Meisy Putri Rahmawati, Ika Mohammad Bisri Munawir, As'ad Munawir, As’ad Nizar, Faisal Nuddin Harahab Pertiwi, Maharani Pramadana, Farhan Prana, Resa Bagus Dharma Prasetyo, Raenal Adji Pratama, Dicky Rosian Pudyono . PUJI LESTARI Pujo Susilo, Ekki Darmawan Purbiantoro, Arie Putro, Galih Karno Qomariyatus Sholihah Raditya, Achmad Gusti Raehanayati Raehanayati Rahayu Kusumaningrum Rahmadya, Reza Roseno Ratri, Lola Kumala Rifqi, Moch. Fachrur Safitri, Ni Luh Eka Sanjaya, Rofi Trianto Sauri, Sofyan Sjaputra, Rakha Soemarno Soemarno Solimun, Solimun Suhasmoro, Auliyah Rizky Sukir Maryanto Suwandoko, Adiwena Bachtiar Syam's, Nova Dewi Safitri Tonny Sahusilawane Undiprastya, Guruh Wardhana, Febra Ndaru Widagda, Rahamdhana Purwa Wulansari, Yunita Yulvi Zaika Yuniar Yuniar