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All Journal Jurnal Ilmiah Teknik Kimia Semantik : Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya Journal Economic Excellence Ibnu Sina
Rahma Amalia
Unknown Affiliation
Arts Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Social Sciences

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Pengaruh Upah Minimum, Tingkat Pengangguran Terbuka, Dan Pendidikan Terhadap Jumlah Penduduk Miskin Di Jawa Timur Tahun 2014-2023 Rahma Amalia; Lastri Khafiah; Tahta Rajani; Muhammad Kurniawan
Journal Economic Excellence Ibnu Sina Vol. 2 No. 2 (2024): Juni : Journal Economic Excellence Ibnu Sina
Publisher : STIKes Ibnu Sina Ajibarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59841/excellence.v2i2.1309

Abstract

Poverty is a complex and multifaceted issue faced by various countries, including Indonesia. East Java, as one of the provinces with the largest population in Indonesia, still has a relatively high poverty rate. Minimum wage, open unemployment rate, and education are three important factors believed to influence the poverty rate. Minimum wage is expected to increase the purchasing power of poor people, while high open unemployment rate and low education levels can exacerbate poverty. This study aims to analyze the influence of Minimum Wage, Open Unemployment Rate, and Education on the Number of Poor People in East Java Province. The independent variables are Minimum Wage, Open Unemployment Rate, and Education, and the dependent variable is the Number of Poor People. This research uses secondary data in the form of time series for 10 years, from 2014 to 2023. The data was obtained from Statistics Indonesia (BPS). The research method is quantitative with data analysis using classical assumption tests (Normality Test, Multicollinearity Test, Heteroscedasticity Test, Autocorrelation Test), multiple linear regression, and statistical tests (Coefficient of Determination Test (R2), T-Test, and F-Test) using Eviews - 10. The partial regression coefficient results show that minimum wage and education do not have a significant effect on the number of poor people in East Java, while the open unemployment rate has a significant effect on the number of poor people in East Java.
Efektivitas Metode Simak-Respons dalam Meningkatkan Hasil Belajar Menyimak pada Siswa SMP Kelas VII Rahma Amalia; Intan Nabila Azahra; Silmi Aulia Nurul Qolbi
Semantik : Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya Vol. 3 No. 2 (2025): May: Semantik : Jurnal Riset Ilmu Pendidikan, Bahasa dan Budaya
Publisher : Asosiasi Periset Bahasa Sastra Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/semantik.v3i2.1668

Abstract

This study explores how a digital-based listen–response method—combining vibrant video stimuli with instant, game-like feedback on the Quizizz platform—can transform listening comprehension from a passive task into an energizing adventure. Involving 39 junior high students, the research gathered performance data from structured listening quizzes and direct teacher observations. With an impressive average score of 87.17—most students achieving “Good” to “Excellent” levels—and vivid improvements in focus and enthusiasm, the findings reveal that turning listening exercises into interactive challenges boosts both comprehension and motivation. Yet, to master higher-order inferential skills, follow-up discussions and reflection activities are essential. By harnessing this method, educators can reimagine listening lessons as interactive journeys that captivate learners and deepen their language skills.
Transformation of Agricultural Waste into Silica–Cellulose Microsponge Adsorbent for Optimization of Waste Cooking Oil as Biodiesel Feedstock Sipayung, Rosmawati; Rahma Amalia; Rara Ayu Lestary; Nita Widyastuti; Oki Alfernando; Ira Galih Prabasari; Nazarudin; Putri Ananda; Intan Nandia Sakti
Jurnal Ilmiah Teknik Kimia Vol. 10 No. 1 (2026): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v10i1.54342

Abstract

The utilization of used cooking oil as a biodiesel feedstock is hindered by its high free fatty acid (FFA) content, which interferes with the transesterification process. This study aims to reduce FFA levels through adsorption using a silica–cellulose-based microsponge adsorbent synthesized from rice husk ash and corn cob waste. The investigated process variables include adsorbent mass (1, 3, 5 g), temperature (30, 45, 60 °C), contact time (30, 60, 90 minutes), and silica-to-cellulose ratios (40:60, 50:50, 60:40). FTIR analysis revealed characteristic peaks of Si–O–Si (~1053 cm⁻¹) and Si–O (~795 cm⁻¹) indicating the presence of amorphous silica, while the O–H stretching (~3200–3500 cm⁻¹) of cellulose appeared weaker due to silica dominance on the surface. This confirms the successful formation of the silica–cellulose composite with strong chemical interaction. Furthermore, Brunauer–Emmett–Teller (BET) analysis showed a specific surface area of 87.77 m²/g with mesoporous characteristics, confirming the microsponge structure with high affinity toward polar molecules such as FFA. The optimum conditions were obtained at 5 g adsorbent mass, 30 °C, 60 minutes contact time, and a 60:40 silica-to-cellulose ratio, achieving an FFA reduction efficiency of 49.62%. These physicochemical properties make the adsorbent efficient, energy-saving, and environmentally friendly, highlighting the great potential of agricultural waste transformation into active materials for pre-purification of used cooking oil toward sustainable biodiesel production.
Co-Authors Intan Nabila Azahra Intan Nandia Sakti Ira Galih Prabasari Lastri khafiah Muhammad Kurniawan Nazarudin Nita Widyastuti Oki Alfernando Putri Ananda Rara Ayu Lestary Rosmawati Sipayung Silmi Aulia Nurul Qolbi Tahta Rajani