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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan International Journal of Applied Sciences and Smart Technologies JURNAL ILMIAH EDUKATIF Griya Journal of Mathematics Education and Application Alinea: Jurnal Bahasa, Sastra, dan Pengajaran JUVOTEK JURNAL: Jurnal Vokasi Teknik Jurnal Ilmiah Teknik dan Sains (JITS) Language, Technology, and Social Media International Journal of Social and Education (INJOSEDU) Indonesian Journal of Education (INJOE)
Darry Christine Silowaty Purba
Politeknik Teknologi Kimia Industri Medan
Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences

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Perhitungan Neraca Massa Pada Unit Screw Press di PT. XYZ Novia Nelza; Darry Christine Silowaty Purba; Agustin Nurya Savitri
JURNAL VOKASI TEKNIK Vol 1 No 01 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

Screw press berfungsi untuk mengekstraksi atau memisahkan minyak kasar (crude oil) dari daging buah (mesocrap) secara mekanis. Pada proses ekstraksi secara mekanis semua massa yang keluar dari digester akan di ekstraksi pada alat yang bernama screw press dengan kapasitas produksi 12 ton/jam, pada proses ekstraksi ditambahkan air dilusi sebesar 9% dari kapasitas produksi. Penelitian ini bertujuan untuk menghitung laju massa masuk dan keluar pada screw press. Metode yang digunakan adalah perhitungan neraca massa. Neraca massa adalah suatu perhitungan dari semua bahan-bahan yang masuk, yang terakumulasi dan keluar pada suatu sistem dalam waktu tertentu. Dari hasil perhitungan neraca massa diperoleh hasil laju massa yang masuk pada screw press yang terdiri dari cacahan yang keluar dari digester sebesar 8,0604 ton/jam dan Air dilusi sebesar 1,08 ton/jam. Sedangkan laju massa yang keluar pada screw press berupa ampas press sebesar 2,352 ton/jam dan crude palm oil sebesar 6,7884 ton/jam.
PENGARUH PEMAKAIAN KLORIN TERHADAP KADAR MANGAN (Mn) DAN BESI (Fe) PADA POST – CHLORINASI DI PT XYZ Rosmiati, Rosmiati; Barus, Adil; Rachmiadji, Irwan; Silowaty Purba, Darry Christine
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

Air sungai Deli yang digunakan sebagai air baku PT. XYZ Deli Tua terdapat zat mangan dan besi dengan kadarnya cukup tinggi serta melebihi ambang baku mutu. Tujuan penelitian ini untuk mengetahui efektivitas kaporit dalam menurunkan kadar mangan dan besi sehingga memenuhi standar baku mutu Peraturan Menteri Kesehatan Nomor 492 Tahun 2010. Sampel air yang digunakan dalam penelitian ini diambil dari 2 titik lokasi Instalasi Pengolahan Air (IPA) Deli Tua. Sampel air baku diambil dengan menggunakan pompa air submersible (pompa celup) yang berada di dasar sungai Deli. Penelitian dilakukan dengan eksperimen jar test di laboratorium. Metode analisis untuk menentukan kadar mangan berdasarkan 1-(2-Pyridylazo)-2-Napthol PAN Method tahun 1977 dan kadar besi mengacu pada FerroZine Rapid Liquid Method tahun 1970 dengan menggunakan metode Spektrofotometri. Hasil penelitian menunjukan kadar mangan dan besi yang cukup tinggi hingga melebihi standar yang telah ditetapkan dalam Peraturan Menteri Kesehatan Nomor 492 Tahun 2010 dengan kadar Mn maksimal 0,4 mg/L dan kadar Fe maksimal 0,3 mg/L. Setelah dilakukan penambahan bahan kimia kaporit ke dalam sampel air sungai Deli dari IPA Deli Tua untuk penurunan Mn dan Fe dapat efektif menurunkan kadar Mn sebesar 82,29 dan Fe sebesar 62,87% dan memenuhi standar baku mutu yang digunakan.
TEACHERS, CURRICULUM AND PROBLEMS: A CRITICAL REFLECTION ON EDUCATION Loso Judijanto; Agustin Nurya Savitri; Darry Christine Silowaty Purba
Jurnal Ilmiah Edukatif Vol. 10 No. 2 (2024): Desember
Publisher : FAKULTAS TARBIYAH INSTITUT AGAMA ISLAM SULTAN MUHAMMAD SYAFIUDDIN SAMBAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37567/jie.v10i2.3307

Abstract

This article examines the relationship between teachers, curriculum and various problems in the education system through critical reflection. Teachers play a central role in curriculum implementation and its influence on the quality of student learning. Nonetheless, they are often faced with various challenges, including lack of welfare, limited professional training and high workloads, which impact on their ability to teach effectively. In addition, rigid curricula that are sometimes irrelevant to 21st century needs often hinder the development of students' cognitive and creative capacities. These problems highlight the need for a more flexible and adaptive curriculum revision and the contribution of all parties in creating a better education system. Collaboration between the government, education managers, teachers and the community is needed to produce an education that not only focuses on academic knowledge, but also on developing important life skills for students.
The Potential of Spent Bleaching Earth In Charcoal Briquettes as Energy Source Tarigan, Enda Rasilta; Mirnandaulia, Meutia; Mustakim, Mustakim; Sitinjak, Anna Angela; Purba, Darry Christine Silowaty; Karo-Karo, Justaman Arifin; Silalahi, Meriahni; Fitri, Li Idi'il; Anwar, Dedy
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 2 (2025): July 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i2.380-392

Abstract

Eco-friendly alternative fuels encourage the use of waste biomass as a material for making briquettes. This study aimed to develop briquettes from rice husk biomass and peat moss and add spent leaching earth (SBE). SBE is a hazardous and toxic waste increasingly piling up in landfills. The research method involved carbonizing rice husks and peat moss, mixing them with SBE, molding with a 200 kg/cm2 Hydraulic Press, and drying. The resulting briquettes had an average water content of 5.86% and an ash content of 2.18%, which meet the SNI No. 01/6235/2000 standard. Morphological analysis revealed that the briquettes were round but exhibited non-homogeneous aggregation. The highest calorific value was found in C4 briquettes of 5030.17 cal/gr. The composition of C4 was 40% rice husk charcoal (4.8 g), 45% peat (5.4 g), and 15% SBE (1.8 g), with SBE dried for seven days. The addition of peat increased the calorific value of the briquettes. Based on scanning electron microscopy (SEM)/ energy-dispersive X-ray (EDX) analysis, the carbon content in the C4 briquettes reached 72.2%. This study shows that the combination of rice husk charcoal, SBE, and peat provides a renewable energy source and contributes to the reduction of environmental waste, thereby promoting sustainability. 
Analisis Tantangan, Peluang serta Implikasi Perbankan Digital terhadap Program Penjaminan Simpanan oleh LPS Purba, Switamy Angnitha; Tampubolon, Ferdinan; Angela Sitinjak, Anna; Nelza, Novia; Christine S. Purba, Darry
Griya Journal of Mathematics Education and Application Vol. 5 No. 3 (2025): September 2025
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v5i3.789

Abstract

Dewasa ini, teknologi informasi berkembang sangat cepat diberbagai bidang layanan salah satunya pada industri perbankan. Saat ini banyak bermunculan perbankan digital yang menawarkan berbagai fitur menarik dan kemudahannya. Namun tak dapat dipungkiri tingkat kepercayaan masyarakat masih terhitung besar pada perbankan konvensional dibandingkan perbankan digital. Lembaga Penjamin Simpanan (LPS) merupakan lembaga negara dengan status berbadan hukum yang independen, transparan dan akuntabel yang berfungsi menjamin simpanan nasabah penyimpan serta turut berperan aktif dalam memelihara stabilitas sistem perbankan sesuai dengan kewenangannya. Dengan adanya LPS diharapkan dapat memulihkan kepercayaan masyarakat terhadap sektor keuangan dan tidak khawatir untuk menyimpan uangnya di perbankan. Fokus penelitian ini adalah untuk mengetahui tantangan dan peluang perbankan digital serta implikasinya terhadap program penjaminan simpanan oleh LPS.
Comparison the adsorption of Pb with Ecofriendly Bio-Adsorbent From Rice Husk Ash and Boiler Fly Ash Tarigan, Enda Rasilta; Sitinjak, Anna Angela; Silalahi, Meriahni; Purba, Switamy Angnitha; Sitanggang, Yenny; Purba, Darry
International Journal of Applied Sciences and Smart Technologies Volume 06, Issue 1, June 2024
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v6i1.7173

Abstract

The amount of environmental pollution is in line with the increasing of industry. Industry can generate waste in the form of solid, liquid or gas. Utilization of waste as an adsorbent is a solution that can be done in dealing with waste such as metal waste contained in water. Therefore, this research aims to make a bio-adsorbent in the form of silica from rice husk ash and boiler fly ash and know the comparison of the Pb absorbed. The research method used is an experimental method by synthesizing the manufacture of silica. Then testing of Pb based on contact time was 30 minutes, 60 minutes, 90 minutes and 120 minutes. The results showed that the two silica-based bio-adsorbents could adsorb Pb. Bio-adsorbent from rice husk ash absorbed 56.51% of Pb in 30 minutes, 52.93% in 60 minutes, 48.65% in 90 minutes and 43.55% in 120 minutes. The bio-adsorbent from the fly ash boiler absorbed 50.15% of Pb in 30 minutes, 44.28% in 60 minutes, 38.48% in 90 minutes and 36.45% in 120 minutes. Bio-adsorbent from rice husk ash absorbs more Pb ions than from boiler fly ash. Because the silica in the rice husk ash forms a collection in the pores, whereas in the fly ash boiler there is silica that is spread out. This research can be a basis for further research in the form of dye bio-adsorbent products based on their short use time.
ADAPTIVE LEARNING TECHNOLOGIES: PERSONALIZING INSTRUCTION TO ENHANCE STUDENT MOTIVATION AND LEARNING OUTCOMES A LITERATURE REVIEW Fitriany; Agustin Nurya Savitri; Darry Christine Silowaty Purba
INJOSEDU: International Journal of Social and Education Vol. 2 No. 12 (2026): International Journal of Social and Education (INJOSEDU)
Publisher : Adisam Publisher

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Abstract

The development of digital technology has encouraged the emergence of adaptive learning technologies that allow personalized learning based on students' abilities and needs. This study aims to examine the development of adaptive learning technology and its implications on learning motivation and student learning outcomes through the library research method. Research data was obtained from various reputable scientific articles indexed by Scopus and other relevant academic sources, then analyzed using content analysis techniques to identify research trends, key findings, and research gaps related to adaptive learning. The results of the study show that adaptive learning technology has the potential to increase student engagement and learning motivation through the presentation of materials that are tailored to individual abilities. In addition, personalization of learning also contributes to improved learning outcomes when supported by appropriate pedagogic design and effective technology integration. However, the implementation of adaptive systems still faces challenges related to infrastructure readiness, educator competence, and user data protection aspects. Therefore, future development of adaptive learning will need to integrate technology, pedagogical strategies, and institutional support to create a more effective and sustainable learning experience.
RESOURCE MANAGEMENT STRATEGIES TO IMPROVE EDUCATION QUALITY IN PRIMARY SCHOOLS Mulyadi; Darry Christine S. Purba; Farida Asy'ari; Al-Amin
Indonesian Journal of Education (INJOE) Vol. 3 No. 2 (2024): Indonesian Journal of Education (INJOE)
Publisher : CV. ADIBA AISHA AMIRA

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Abstract

Effective resource management strategies are key to improving the quality of education in primary schools. Continuous development of teachers' capacity through training programs in line with curriculum needs and the use of the latest educational technology play a vital role in enriching students' learning experience. Improved school infrastructure such as conducive classrooms, updated laboratories and well-stocked libraries support more efficient and interactive teaching and learning. Collaboration with parents and the school site community is equally important, through mobilizing additional support and resources, which in turn, improves student motivation and learning outcomes. The research method used in this study is the literature research method. The results show that continuous professional development for teachers is a dominant factor in improving the quality of learning. Effective programs include customized training that is integrated with current educational needs and objectives. Adequate educational infrastructure and access to educational technology also play an important role in creating an efficient learning environment and encouraging students to perform better academically. Finally, parental and community involvement was found to be a key aspect in enhancing students' learning motivation and sustaining the school's efforts in providing educational resources. It also strengthens the school's relationship with external stakeholders and helps in the mobilization of additional resources
An Evaluation of English Language Learning Based on Outcome-Based Education (OBE) in Higher Education Agustin Nurya Savitri; Darry Christine Silowaty Purba
Alinea: Jurnal Bahasa, Sastra dan Pengajaran Vol. 6 No. 2 (2026): Alinea: Jurnal Bahasa, Sastra, dan Pengajaran
Publisher : Bale Literasi: Lembaga Riset, Pelatihan & Edukasi, Sosial, Publikasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58218/alinea.v6i2.3094

Abstract

The implementation of Outcome-Based Education (OBE) in Indonesian higher education has reshaped English language learning, yet systematic evaluation of its effectiveness remains limited. This research addresses the urgent need to evaluate whether OBE-based English instruction achieves intended learning outcomes, given persistent gaps between curriculum design and classroom practice. The objective of this study is to evaluate OBE-based English language learning in higher education, specifically examining outcome achievement, curriculum-practice alignment, implementation challenges, and stakeholder perception consistency. A qualitative evaluative approach was employed, involving semi-structured interviews with six English instructors, focus group discussions with fifteen students across proficiency levels, classroom observations of twenty sessions, and document analysis of course syllabi and OBE policy documents. Thematic analysis revealed four main findings: OBE learning outcomes are partially achieved, with writing outcomes significantly lower than speaking and listening; substantial misalignment exists between OBE curriculum documents and practice, with teacher-centered instruction dominating 70% of observed sessions; multidimensional challenges including resource limitations, pedagogical difficulties, and cultural factors constrain implementation; and instructors systematically overestimate student outcome attainment compared to student self-assessments. The study concludes that OBE-based English learning requires targeted writing interventions, instructor professional development in authentic assessment design, technology infrastructure investment, multi-stakeholder evaluation mechanisms, and cultural adaptation strategies. Further longitudinal and comparative studies across institutions are recommended.
Pengaruh Pemakaian Klorin Terhadap Kadar Mangan (Mn) Dan Besi (Fe) Pada Post – Chlorinasi di PT Xyz Rosmiati Rosmiati; Darry Christine Silowaty Purba; Adil Barus; Irwan Rachmiadji
JURNAL VOKASI TEKNIK Vol 1 No 02 (2023): JURNAL VOKASI TEKNIK (JUVOTEK)
Publisher : CV MEDAN TEKNO SOLUSI

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Abstract

The water of the Deli river used as raw water for PT. XYZ Deli Tua contains manganese and iron, which levels were quite high and exceeded the quality standard. The purposes of the research are to determine the effectiveness of caporite to reduce levels of manganese and iron to reach levels that meet the standards Minister of Health Regulation Number 492 of 2010. The sample used in this study was the water of the Deli river used as a source of raw water for PT. XYZ Medan water treatment plant (WTP) location in Deli Tua. Raw water was taken using a submersible water pump located at the bottom of the Deli river. The analytical method used as a reference manganese levels was based on 1- (2-Pyridylazo) -2-Naphthol PAN Method 1977, for determining iron levels was based on the FerroZine Rapid Liquid Method 1970, and for both methods using the Spectrophotometric method. The results showed that iron and manganese levels were quite high, exceeding the standards Minister of Health Regulation Number 492 of 2010 with a maximum standard of manganese level is 0.4 mg/L and a maximum standard of iron content is 0.3 mg/L. After adding a certain dose of chlorine to Deli river water in the Deli Tua WTP, it was found that chlorine effectively reduced Mn 66,6% and Fe 43,03% and meet the quality standards.
Co-Authors Adil Barus Agustin Nurya Savitri Al-Amin Angela Sitinjak, Anna ANWAR, DEDY Barus, Adil Darni Paranita Dimas Frananta Simatupang Donda Donda Farida Asy'ari Fitri, Li Idi'il Fitriany Herry Darmadi Iqbal Huseini Irwan Rachmiadji Karo-Karo, Justaman Arifin Loso Judijanto Manan Ginting Maulidna, Maulidna Meutia Mirnandaulia Muhammad Vandi Mulyadi Mustakim Mustakim Naqasya Asyrori Sidabutar Nelza, Novia Novia Nelza Purba, Switamy Angnitha Rachmiadji, Irwan Ratih Paramitha Ratna Kristina Tarigan Rosmiati Rosmiati Rosmiati Rosmiati Silalahi, Meriahni Sindi Wahyuni Sitanggang, Yenny Tampubolon, Ferdinan Tarigan, Enda Rasilta Ulfani Ikhwana Purba