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All Journal JURNAL TAHURI Makara Journal of Technology IIJSE Journal of Learning Technology
Anggara Anggara, Anggara
Departemen Teknik Kimia, Universitas Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Other

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CO2 Absorption from Its Mixture with CH4 or N2 through Hollow Fiber Membrane Contactor using Water as Solvent Kartohardjono, Sutrasno; Anggara, Anggara; Subihi, Subihi; Yuliusman, Yuliusman
Makara Journal of Technology Vol. 11, No. 2
Publisher : UI Scholars Hub

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Abstract

CO2 Absorption from Its Mixture with CH4 or N2 through Hollow Fiber Membrane Contactor using Water as Solvent. Hollow fiber membrane contactors have been widely used as gas-liquid contactors recently such as in the CO2 absorption process from gas stream. This research aims to evaluate the effectiveness of hollow fiber membrane contactor to absorb CO2 from its mixture with CH4 or N2 using water through mass transfer and hydrodynamic tests. There are 3 membrane modules used in this research with shell diameter of 1.9 cm, length of 40 cm, outer fiber diameter of 2.7 mm and fiber number in the contactors of 10, 15 and 20. Liquid flow rates in the hollow fiber membrane contactors are varied in this research. Research results show that mass transfer coefficients in the membrane contactor increase with increasing liquid flow rate and decrease with increasing fiber number in the contactor. Flux of CO2 into water can achieve 1.4x10-9 mol CO2 /m2.s and mass transfer coefficients can achieve 1.23 x 10-7 m/s. Meanwhile, hydrodynamic test results show that water pressure drop in the membrane contactors increase with increasing fiber number in the contactors.
Mobile Learning Berbasis Android Sebagai Media Pembelajaran Bahasa Inggris Pada SDN 1 Banjar Manis Anggara, Anggara; Mardiyanto, Mardiyanto
JELTec (Journal of Learning Technology) Vol. 3 No. 1 (2025): JELTec (Journal of Learning Technology)
Publisher : YHMM PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56327/jeltec.v3i1.102

Abstract

In today's modern era, technological advancements have transformed traditional face-to-face learning into information technology-based education. Books and teachers, once the primary sources of learning, are now supplemented by internet-based resources, especially during the Covid-19 pandemic, which required online learning innovations. One such innovation is mobile learning, defined as the use of mobile devices in teaching and learning processes. This study aims to develop electronic teaching materials in the form of mobile learning for the English subject at SDN 1 Banjar Manis. English is a compulsory subject at the elementary level, emphasizing interaction and vocabulary development to support daily communication skills. The mobile learning application allows students to download teaching materials via smartphones installed with the mobile learning platform. The application was developed using Android Studio, Notepad, PHP, a MySQL database, and designed with Photoshop. With this application, teachers and students can easily interact online, and learning materials can be accessed anytime and anywhere, making the learning process more flexible and effective.
Uncovering Factors Affecting Employee Performance in the Poultry Processing Industry in Kuningan Regency: Competency, Training, and Compensation Mubina, Syahdu Fatham; Anggara, Anggara; Sulistiyowati, Lisa Harry; Sunimah, Sunimah
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Sharia Economics Department Universitas KH. Abdul Chalim, Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.7117

Abstract

Enhancing employee performance is influenced by competence, training, and pay. The study’s goal was to examine how these three elements affected worker performance in Kuningan’s poultry processing sector. The study employed a quantitative, associative research design. Out of 242 employees, 151 respondents were chosen for the study using a purposive sampling technique. Using SmartPLS software, questionnaires with a five-level Likert scale were distributed in order to collect data, which was then analyzed using the Structural Equation Modeling (SEM) method based on Partial Least Square (PLS). The findings indicated that while compensation did not significantly affect employee performance on its own, competency and training did. On the other hand, with a 54.1% contribution, competence, training, and pay all significantly affect employee performance. Competency is the variable that influences other variables the most strongly.
Learning Beyond the Classroom: English Clubs and Students’ Speaking Competence in an Indonesian EFL Context Aditya, Noval; Prayogo, Dimas; Anggara, Anggara
Jurnal Tahuri Vol 21 No 2 (2024): August 2024
Publisher : Jurusan Pendidikan Bahasa dan Seni FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tahurivol21issue2page137-154

Abstract

This study investigates learning beyond the classroom by examining the role of English Clubs in enhancing students’ speaking competence within the Indonesian EFL context. It is motivated by the limited opportunities for authentic speaking practice in formal classrooms, which remain predominantly grammar- and exam-oriented. Focusing on the English Club at SMA 54 Jakarta, the research aims to describe its design and management, analyze how its activities support students’ speaking development, and identify supporting and inhibiting factors affecting its effectiveness. Adopting a qualitative descriptive–interpretative approach, data were collected through participant observation, in-depth interviews with the club advisor and 10–15 student members, and documentation of club activities and student outputs. Thematic analysis identified recurring patterns in learning practices, perceived progress, and influencing factors, supported by triangulation for credibility. Findings indicate that the English Club serves as an alternative, empowering learning space that complements formal instruction through communicative activities, debates, storytelling, public speaking, and games, that foster fluency, confidence, pronunciation, and interactional strategies. Key enablers include intrinsic motivation, peer solidarity, and teacher support, while time constraints and varied proficiency levels present challenges. The study contributes to understanding English Clubs as communities of practice that operationalize Communicative Language Teaching and Task-Based Learning, offering a replicable model for schools and policy support for student-led initiatives.
Co-Authors Aditya, Noval Mardiyanto Mardiyanto Mubina, Syahdu Fatham Prayogo, Dimas Subihi Subihi, Subihi Sulistiyowati, Lisa Harry Sunimah, Sunimah Sutrasno Kartohardjono Yuliusman Yuliusman