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Menampilkan 1–10 dari 31 artikel
Effect of Different Layers on the Performance of Laminate Epoxy Composite Reinforced with Textile Waste
Thomas Junaedi
; Siregar, Januar Parlaungan
; Zalani, Mohamed Reza
; Imran, Al Ichlas
; Tezara Cionita
; Endah Murtiana Sari
; Deni Fajar Fitriyana
; Etanto Heiliano Wijayanto
Post-consumer textile waste poses significant environmental problems, but its potential for commercial recycling remains under-researched. Therefore, this study utilizes calico textile (CT) waste as reinforcement in polymer composites. The effect of layering number of CT in epoxy composite will be investigated. CT was varied with three layers, namely 1, 3, and 5 embedded in epoxy resin with the hand lay-up method in open molding. The mechanical testing of pure epoxy as a control point for tensil...
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IMPLEMENTASI PENDIDIKAN KARAKTER DALAM MATA PELAJARAN PENDIDIKAN KEPERCAYAAN TERHADAP TUHAN YANG MAHA ESA DAN BUDI PEKERTI DI SMP NEGERI 2 SUMOWONO KABUPATEN SEMARANG
NALAR: Jurnal Pendidikan dan Kebudayaan
Vol 4
, No 2
(2025)
Penelitian ini menganalisis implementasi pendidikan karakter oleh Penyuluh dalam mata pelajaran Pendidikan Kepercayaan Terhadap Tuhan Yang Maha Esa dan Budi Pekerti di SMP Negeri 2 Sumowono. Fokus penelitian meliputi strategi pengajaran, metode penyampaian nilai karakter, tantangan, serta faktor pendukung dan penghambat. Metode kualitatif digunakan dengan wawancara, observasi, dan analisis dokumen. Hasil menunjukkan pendidikan karakter diterapkan melalui lima elemen utama yaitu Sejarah, Keagunga...
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Development of A Parametric Cost Estimation Model for Landfill Construction Projects
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
Indonesia’s waste management system is still dominated by the collect–transport–dispose approach, making landfills crucial for environmental sustainability. Landfill construction is a complex process requiring accurate cost estimation to prevent overruns and delays. This study develops a landfill construction cost estimation model using the Cost Significant Model (CSM) approach. Data were obtained from landfill project budgets in Java, Indonesia (2013–2021) and analyzed using multiple linear reg...
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Mechanical Properties of Epoxy Composite Reinforced with Spent Coffee Ground and Coffee Husk
Etanto Heiliano Wijayanto
; Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Mohd Ruzaimi Mat Rejab
; Tezara Cionita
; Wisnu Prayogo
; Deni Fajar Fitriyana
; Rozanna Dewi
; Thomas Junaedi
; Agustinus Purna Irawan
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
This study aims to investigate the effect of increasing the concentration of natural filler on the mechanical properties of Spent Coffee Ground (SCG) / Coffee Husk (CH) reinforced epoxy matrix composite. The materials used in this study are epoxy resin as a matrix and waste coffee grounds and coffee husks as natural fillers with sizes of 100-mesh and concentrations of 10, 20, and 30 wt.%. The results showed that SCG 10 wt.% produced the best mechanical properties compared to the other samples ba...
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Mechanical Performance of Epoxy Composite Reinforced with Wood Dust and Crumb Rubber Waste
Imran, Al Ichlas
; Siregar, Januar Parlaungan
; Cionita, Tezara
; Fitriyana, Deni Fajar
; Anis, Samsudin
; Dewi, Rozanna
; Junaedi, Thomas
; Wijayanto, Etanto Heiliano
; Prayogo, Wisnu
Advance Sustainable Science, Engineering and Technology (ASSET)
Vol 7
, No 4
(2025)
The incorporation of wood dust and crumb rubber waste as filler in polymer matrix composite still requires in-depth evaluation of mechanical properties because they have different characteristics. This study evaluates the tensile, flexural, and hardness properties of epoxy composites reinforced with various fractions of wood dust and crumb rubber (5, 10, and 15%). The results showed that the composite with 5% crumb rubber produced the highest tensile strength of 15.52 MPa (CR5), while the highes...
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PENGGUNAAN MEDIA BELAJAR PUZZLE SIMBOL PRIBADI MANUSIA UNTUK MENINGKATKAN KEMAMPUAN KOGNITIF PESERTA DIDIK SAPTA DARMA KELAS 5 PADA MATA PELAJARAN PENDIDIKAN KEPERCAYAAN TERHADAP TUHAN YANG MAHA ESA DAN BUDI PEKERTI DI SDN SAMBAN 2 KABUPATEN SEMARANG
NALAR: Jurnal Pendidikan dan Kebudayaan
Vol 4
, No 1
(2025)
Pendidikan abad ke-21 menuntut adanya pengembangan kognitif sebagai bagian integral dari proses pembelajaran. Penelitian tindakan kelas ini bertujuan untuk meningkatkan kemampuan kognitif peserta didik penghayat Sapta Darma Kelas 5 di SDN Samban 2 Kabupaten Semarang, melalui penerapan media puzzle simbol pribadi manusia. Penelitian ini berlangsung selama dua siklus. Variabel bebas dalam penelitian ini yaitu media belajar puzzle Simbol Pribadi Manusia, sedangkan kemampuan kognitif sebagai variab...
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3D Model Autocad Of The Piston Displacer Cup For A Gamma Stirling Engine Using The API Method
Rahmat, Rahmat
; Dean Anggara Putra
; Rifo Nurlaksana Restu
; Jefri Imron
; Marhaendra Natawibawa
; Hery Sumardiyanto
; Khairil Munawar
; Thomas Junaedi
Jurnal Elektronika dan Komputer
Vol 18
, No 1
(2025)
When producing a perfect product, design process namely 2D modeling and 3D drawing, are closely related. The purpose of this study is to design a 3D model of a gun mastering machine product as a fan drive using CAD applications. The method of this study is decision data on API production (analytical product inspection). Measurement of sterling machine degradation using CPK (deviation) received results of -0.97, -0.22, 0.86, 0.11, 0.11 between zero and what indicates this specification. On averag...
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EFFECT OF FERTILIZER TYPE ON THE PRODUCTIVITY OF ELEPHANT GRASS (PENNISETUM PURPUREUM): A COMPARATIVE STUDY OF GOAT MANURE COMPOST, UREA, AND NPK ON INCEPTISOL SOIL
Agrisaintifika : Jurnal Ilmu - Ilmu Pertanian
Vol 9
, No 2
(2025)
Forage productivity strongly depends on appropriate fertilization strategies, particularly in the cultivation of Pennisetum purpureum (elephant grass), a key tropical livestock feed. This study aimed to compare the effects of three fertilizer types—goat manure compost, urea, and NPK—on the productivity of elephant grass grown on inceptisol soil. A Completely Randomized Design (CRD) was employed with four treatments (no fertilizer, 2 tons/ha compost, 150 kg/ha urea, and 422 kg/ha NPK) and three r...
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Digital Mind-Mapping in EFL Learners‘ Speaking: Seeking the Improvement
Scripta : English Department Journal
Vol 12
, No 1
(2025)
This study explores the integration of digital mind mapping to enhance the speaking skills of ninth-grade learners at SMP Darul Hikmah Kutoarjo. The research adopts a CAR, which is a Classroom Action Research approach, which is conveyed over two stages. This research addresses concerns, particularly limited idea generation, less motivation in speaking, and lack of self-confidence among learners. Data analysis employed research findings, data visualization, and data reduction techniques. Res...
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English Lecturers' Perceptions towards the Quillbot App: An Alternative for Students in Paraphrasing and Rewriting English Writing
International Journal of Research in Education
Vol 5
, No 1
(2025)
This study examines the perceptions of English lecturers at the Faculty of Languages and Culture, University of 17 Agustus 1945 Semarang, regarding the use of QuillBot, an AI-powered paraphrasing tool, in academic writing. In an era where digital tools are transforming educational practices, QuillBot offers features such as grammar improvement, paraphrasing, and plagiarism prevention, which are particularly beneficial for non-native English speakers. Employing a quantitative research approach, d...
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