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All Journal Bulletin of Scientific Contribution : Geology Jurnal Ilmiah Peuradeun Jurnal Ilmiah Universitas Batanghari Jambi Mediakom : Jurnal Ilmu Komunikasi JISA (Jurnal Informatika dan Sains) EDUNursing SEMAR Journal of Government and Politics (JGOP) Asimetris: Pendidikan Matematika dan Sains Jurnal Kinerja Kependidikan (JKK) Jurnal Pendidikan Pemuda Nusantara Pancasakti Journal Of Public Health Science And Research Proceedings of International Conference on Multidiciplinary Research JIEPS: Jurnal Ilmiah Ekonomi Islam dan Perbankan Syariah Fakultas Agama Islam Universitas Muhammadiyah Aceh Journal of Innovation Research and Knowledge ABDINE Jurnal Pengabdian Masyarakat Accounting Research Journal Analysis Jurnal Pengabdian Masyarakat dan Riset Pendidikan JPM AKSIOMA : Jurnal Sains Ekonomi dan Edukasi Seminar Nasional Riset dan Teknologi (SEMNAS RISTEK) Journal of Engineering and Technological Sciences Journal of Economy Business Development Jurnal Geosaintek Jurnal Ekonomi, Manajemen, dan Bisnis
Rizka Rizka, Rizka
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STUDI EKSPERIMENTAL DARI PERMEABILITAS DAN STRUKTUR MIKRO PADA TANAH DI TPA BAKUNG Rizka, Rizka; Irwan Iskandar; M Bisri Mustofa
Journal of Innovation Research and Knowledge Vol. 5 No. 7 (2025): Desember 2025
Publisher : Bajang Institute

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Abstract

Penelitian ini mengamati karakteristik permeabilitas makroskopis, komposisi mineral, dan perubahan mikrostruktur pada lempung di TPA Bakung menggunakan uji permeabilitas falling head test, X-ray diffraction (XRD), and Scanning Electron Microscope (SEM). Hasil uji permeabilitas falling head test menunjukan bahwa nilai permeabilitas diantara 0.000004 cm/det sampai 0.000042 cm/det yang merupakan tanah lempung. Uji XRD dan SEM menunjukkan bahwa mineral pada TPA Bakung mayoritas termasuk mineral lempung yang terdiri dari kaolinit, kristobalit, muskovit, dan quartz. Berdasarkan nilai permeabilitas dapat disimpulkan tidak semua tanah di TPA Bakung memiliki permeabilitas yang sesuai dengan persayaratan peraturan kementerian lingkungan hidup
Pemberdayaan Perempuan Berbasis Green Economy untuk Meningkatkan Kesejahteraan Kader Perempuan Muhammadiyah Yunanto, Primadiyanti; Setiowati, Yuli; Nuraini, Nuraini; Salamah, Salamah; Rizka, Rizka; Nida, Syaima
ABDINE: Jurnal Pengabdian Masyarakat Vol. 5 No. 2 (2025): ABDINE : Jurnal Pengabdian Masyarakat
Publisher : Sekolah Tinggi Teknologi Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52072/abdine.v5i2.1612

Abstract

Permasalahan limbah organik rumah tangga yang belum dikelola secara optimal serta rendahnya literasi kewirausahaan ramah lingkungan menjadi tantangan bagi kader perempuan Muhammadiyah di Kabupaten Paser. Kegiatan pengabdian ini bertujuan meningkatkan kapasitas kader melalui pendekatan green economy dengan fokus pada produksi ecoenzyme dan pemanfaatan pemasaran digital. Metode pelaksanaan meliputi sosialisasi, pelatihan kewirausahaan berkelanjutan, green marketing, digital marketing, praktik pembuatan ecoenzyme, serta pendampingan intensif secara langsung maupun melalui media digital. Mitra kegiatan terdiri atas 35 kader perempuan Muhammadiyah. Hasil evaluasi melalui pre-test dan post-test menunjukkan peningkatan pemahaman peserta dari 40% menjadi 85%. Sebanyak 91% peserta mampu memproduksi ecoenzyme secara mandiri, 71% dapat memasarkan produknya secara digital, dan 80% menyatakan minat untuk mengembangkan usaha ramah lingkungan. Program ini terbukti meningkatkan keterampilan teknis (hard skills) dan kemampuan non-teknis (soft skills) peserta secara signifikan, serta mendorong terbentuknya komunitas usaha perempuan yang berkelanjutan dan berorientasi pada pelestarian lingkungan.
Implementation of a Website-Based Proposal Seminar Registration System Using the Waterfall Method at Sheikh Abdul Halim Hasan Binjai Institute Rizka, Rizka; Lubis, Fitra Hidayat; Berutu, Asro Hayati; Ritonga, Saprina Putri Utama; Gibran, M Khalil
JISA(Jurnal Informatika dan Sains) Vol 8, No 1 (2025): JISA(Jurnal Informatika dan Sains)
Publisher : Universitas Trilogi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31326/jisa.v8i1.2200

Abstract

Registration of proposal seminars at the Sheikh Abdul Halim Hasan Binjai Institute is still done manually, which causes problems such as late information, errors in data recording, and lack of efficiency in administrative management. The institute currently has approximately 1,200 active students, with an average of 150–200 students submitting seminar proposals each semester. This increasing number of participants makes the manual system even more burdensome and prone to errors. To overcome these problems, a website-based proposal seminar registration system was implemented. This system is designed to make it easier for students to register, as well as help the administration in managing the data of seminar participants in a more effective and structured manner. The system development uses the PHP programming language with a MySQL database and the waterfall development method as a systematic approach in the implementation process. The results of the implementation show that the system is able to improve the efficiency of the registration process, minimize data errors, and provide real-time information for students and supervisors. With this system, it is expected that the proposal seminar administration process will become more organized and transparent.
Assessment of Groundwater Contamination around Bakung Landfill, Lampung, Indonesia Using Geoelectrical Resistivity and Hydrogeochemical Data Rizka, Rizka; Santoso, Djoko; Warsa, Warsa; Iskandar, Irwan
Journal of Engineering and Technological Sciences Vol. 58 No. 2 (2026): Vol. 58 No. 2 (2026): April
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2026.58.2.1

Abstract

This study investigates groundwater contamination caused by leachate migration at the Bakung landfill during the wet and dry seasons using geoelectrical resistivity and hydrogeochemical methods. The objective is to describe groundwater contamination resulting from leachate and assess groundwater quality from nearby wells along the edge of the Bakung landfill. 1D resistivity sounding (vertical electrical sounding (VES)) survey was conducted at eight sounding points using the Schlumberger configuration, and four lines of 2D resistivity imaging (electrical resistivity tomography (ERT)) were acquired inside and outside the landfill site using the Wenner configuration. The 1D resistivity inversion model show that subsurface resistivity values lower than 40 Ωm are likely associated with tuff rocks, whereas resistivity values greater than 40 Ωm are associated with volcanic breccia. The 2D resistivity imaging model indicates a leachate plume. Migrating into the lower layers of the landfill occurs from the northeast and northwest, suggesting potential contamination of shallow groundwater systems as the landfill ages. The hydrogeochemical assessment of groundwater samples followed APHA standards, identifying hydrogeochemical facies using the Piper diagram and interpreting hydrogeochemical processes using the Gibbs and Gaillardet diagrams. The Piper diagram shows the presence of mixed Ca-Mg-Cl, Ca-HCO3, and Na-Cl facies, with the Na-Cl type found only in well W1, which contains leachate. Contaminated areas exhibit slight increases in ionic concentrations. To prevent contamination from migrating into the aquifer, contaminated zones must be identified.
Analysis of Service Quality for Transjakarta Bus Transportation Users Effendi, Ahmad Haidar; Dawina, Fathia Ayu; Farlina, Happy Yeary; Savira, Naura; Rizka, Rizka
Jurnal Ekonomi, Manajemen, dan Bisnis Vol. 3 No. 2 (2025): Jurnal Ekonomi, Manajemen dan Bisnis
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/emis.v3i2.249

Abstract

This study aims to examine the quality of Transjakarta Bus service from the user’s perspective. Using a qualitative approach and descriptive survey method, data were collected from 202 respondents through an online questionnaire based on a Likert scale. This study focuses on five dimensions of SERVQUAL, namely Physical, Reliability, Responsiveness, Assurance, and Empathy. The results of thematic analysis show that many respondents emphasize the importance of physical comfort of the bus, punctuality of service, and official interaction as the main factors in assessing their satisfaction. Responsiveness and empathy from officers are the two dimensions that most influence positive user views. This study also found obstacles such as lack of information about routes and the number of passengers exceeding the limit, which often become obstacles in the travel experience. The conclusion of this study is that improvements in the aspects of responsiveness, assurance, and clear information delivery to passengers have the potential to increase user satisfaction and loyalty to Transjakarta services. As a recommendation, it is suggested that Transjakarta management improve the accuracy of bus schedules, enhance officer training in customer service, and optimize fleet distribution during peak hours to address waiting time issues and improve overall service quality.
PENGARUH PENJUALAN, BIAYA PRODUKSI DAN BIAYA OPERASIONAL TERHADAP LABA BERSIH PT VALE INDONESIA TBK. PERIODE 2018-2024 Rizka, Rizka; Kurniawan, Reza; Mulyana, Asep
Accounting Research Journal Vol. 3 No. 2 (2025): Accounting Research Journal (March 2025 - Aug 2025)
Publisher : Department of Accounting, Faculty of Economics, Universitas Nurtanio Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56244/accrual.v3i2.994

Abstract

Penelitian ini dilakukan bertujuan untuk mengetahui pengaruh penjualan,biaya produksi dan biaya operasional terhadap laba bersih PT Vale Indonesia Tbk. periode 2018—2024. Metode penelitian yang digunakan deskriptif dan asosiatif. Data yang digunakan merupakan data sekunder berupa laporan keuangan yang di dapatkan melalui laman resmi Bursa Efek Indonesia (BEI). Berdasarkan hasil penelitian secara parsial penjualan berpengaruh terhadap laba bersih, biaya produksi tidak berpengaruh terhadap laba bersih dan biaya operasional tidak berpengaruh terhadap laba bersih. Penjualan, biaya produksi dan biaya operasional secara simultan berpengaruh terhadap laba bersih.
Pemberdayaan Masyarakat Dalam Pengembangan Sagu Sebagai Produk Unggulan Lokal Menuju Kampung Sagu Di Desa Tanah Periuk Kabupaten Paser Jufri, Fikri; Nuraini, Nuraini; Setiowati, Yuli; Aminullah, Veri Febrian; Rahman, Fathur; Rizka, Rizka; Nida, Syaima
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 15, No 1 (2026): Mei
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v15i1.110699

Abstract

Program pengabdian masyarakat ini bertujuan untuk meningkatkan pengetahuan dan keterampilan masyarakat Desa Tanah Periuk dalam diversifikasi olahan sagu, serta menumbuhkan jiwa kewirausahaan melalui pelatihan pembuatan produk bernilai ekonomi tinggi menuju terbentuknya "Kampung Sagu". Berdasarkan hasil penelitian (Farisa et al., 2024), Desa Tanah Periuk memiliki potensi 1.200 pohon sagu yang terdiri dari 1.170 sagu Molat dan 30 sagu Tuni yang belum dimanfaatkan secara optimal. Metode pelaksanaan meliputi: (1) Survei dan FGD untuk identifikasi kebutuhan; (2) Sosialisasi tentang potensi ekonomi sagu; dan (3) Pelatihan praktik pembuatan kue kenari dan kue lapis sagu. Kegiatan dilaksanakan pada 23-24 Mei 2024 di Kantor Desa Tanah Periuk dengan melibatkan 15 peserta ibu-ibu PKK dan Teras UMKM Paser sebagai narasumber. Hasil evaluasi menunjukkan peningkatan pengetahuan peserta sebesar 76% (dari rata-rata skor pre-test 45 menjadi post-test 79), dan 93% peserta mampu mempraktikkan pembuatan kedua produk dengan baik. Sebanyak 11 peserta (73%) menyatakan berminat membuka usaha olahan sagu skala rumah tangga. Program ini berhasil membuka wawasan baru tentang diversifikasi olahan sagu dan menumbuhkan motivasi kewirausahaan di kalangan ibu-ibu PKK Desa Tanah Periuk.Kata kunci: Sagu; Kampung Sagu; Pemberdayaan Masyarakat; Diversifikasi Produk; Kewirausahaan.
Co-Authors Abubakar Abubakar Agam, Jumaegi Ahmad Rowatul Irham Ahmad Sinala ahmad yani Aminullah, Veri Febrian Amrullah, Muhammad Ilham Anwar Anwar Aprilia Aprilia, Aprilia Arfan, Fahmi Arlina Arlina, Arlina Arwizet Arwizet, Arwizet Asep Mulyana Assegaf, S. Zulfikar B.M.A.S. Anaconda Bangkara Baehaqi Bashkara, Oktavian Teguh Berutu, Asro Hayati Dawina, Fathia Ayu Djoko Santoso Effendi, Ahmad Haidar Ervan Prasetyo Faridy, Najihatul Farlina, Happy Yeary Fathur Rahman Finta Amalinda Firman Firman Gibran, Enrico Gibran, M Khalil hanifah hanifah Hayati Hayati Herdiansyah Herdiansyah Husaini Husaini Idrus M. Said Ifandri, Ifandri Ihsan Ihsan Imam Gunanjar Indri Safitri, Indri Irwan Irwan Irwan Iskandar Jufri, Fikri Kalsum Kalsum Khotimah Khotimah Lea Kristi Agustina Lubis, Fitra Hidayat M Bisri Mustofa M. Sholahuddin Manda, Darmawati Mansyur, Mauluddin Marlina Marlina Mathius, Denny Mazmuloh, Hot Meilin Anggreyni Mohamad, Mohamad Mu'in, Fathul Muhamad Saleh Muhammad Idris Mutia, Ratna Nasir Nasir Natsir, Fanda Indiana Novita Naufaldi, Muhammad Iqbal Nida, Syaima Niko, Niko Nuraini Nuraini Padnadi, Wahyudi W. Putraloka, Arvico Qhoirunnisa Abdul Malik, Nur Fitri Rachmawati, Diana Widhi Rahmatun, Rahmatun Rahmi, Ince Ramdani Salam Reza Kurniawan Ririn Ririn Riska Riska Ritonga, Saprina Putri Utama salamah salamah Saragih, Tuty Kurniawaty Savira, Naura Setyowati, Irlisa Sihombing, Andreas Pujian Simamora, Elisabet Ade Saputri Siti Hasanah Siti Khaulah, Siti Khaulah Sudirman Sudirman Sulistiawati Sulistiawati Sulthanah, Sulthanah Sutanto, Vinnawaty Syamsuddin, Nurfiani Toibah Umi Kalsum Warsa Warsa Waruwu, Petrus Wati, Ambar Wulandari Wulandari Yuli Setiowati Yunanto, Primadiyanti Yusup, Yusup