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All Journal Transmisi: Jurnal Ilmiah Teknik Elektro Rotasi REKA RACANA Novum : Jurnal Hukum E-SOSPOL Pedagogi : Jurnal Penelitian Pendidikan Profesi Pendidikan Dasar JURNAL KEPERAWATAN MERSI Journal of Civil Engineering Jurnal DIDIKA: Wahana Ilmiah Pendidikan Dasar Tadarus: Jurnal Pendidikan Islam DIDAKTIKA TAUHIDI: JURNAL PENDIDIKAN GURU SEKOLAH DASAR Ciencias : Jurnal Penelitian dan Pengembangan Pendidikan Ensiklopedia of Journal Jurnal Gentala Pendidikan Dasar Wahana Sekolah Dasar PrimaryEdu - Journal of Primary Education Jurnal Prakarsa Paedagogia SABILARRASYAD Jurnal Ilmiah Profesi Pendidikan JIIP (Jurnal Ilmiah Ilmu Pendidikan) Didaktik : Jurnal Ilmiah PGSD STKIP Subang Jurnal Pendidikan Dasar Perkhasa Construction and Material Journal APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) jurnal dikdas bantara Renjana Pendidikan Dasar Pendagogia: Jurnal Pendidikan Dasar Ibtidai'y Datokarama: Jurnal Pendidikan Dasar Pendikdas: Jurnal Pendidikan Dasar caXra: Jurnal Pendidikan Sekolah Dasar Makara Journal of Technology Wicarana Jurnal Pendidikan Dasar Borneo (Judikdas Borneo) Jurnal Studi Keperawatan Mamangan Social Science Journal Jurnal Ilmia Widya Pustaka Pendidikan Jurnal Adijaya Multidisiplin Jurnal Sains Student Research Attadrib: Jurnal Pendidikan Guru Madrasah Ibtidaiyah Jurnal Edutrained : Jurnal Pendidikan dan Pelatihan Trends in Applied Sciences, Social Sciences, and Education Himpunan: Jurnal Ilmiah Mahasiswa Pendidikan Matematika TERAS: Jurnal Pengabdian Masyarakat Sosial Budaya Pena Anda PAEDAGOGIE EDUKASI : Jurnal Penelitian dan Artikel Pendidikan
Heru Purnomo
Universitas Indonesia
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Pengaruh Penggunaan Media Kotak Pintar Terhadap Kemampuan Membaca Pada Siswa Kelas I SD Negeri Kasongan Olanda, Viona; Purnomo, Heru
Edukasi: Jurnal Penelitian dan Artikel Pendidikan Vol 16 No 2 (2024)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/edukasi.v16i2.11619

Abstract

This research seeks to assess the impact of using smart box media on the reading abilities of first-grade students at SD Negeri Kasongan. The research adopts a quantitative approach with a Quasi-Experimental Design method of the nonequivalent control group design type. The sample in this study was taken using a saturated sampling technique, consisting of two classes: class I A at SD Negeri Kasongan with 25 students as the experimental class using the smart box media and class I B at SD Negeri Kasongan with 25 students as the control class using PowerPoint media. The methods for data collection included observation, questionnaires, tests, and documentation. Data analysis techniques involved normality testing using the Shapiro-Wilk test, homogeneity testing using the F-test, hypothesis testing using the Independent Sample T-test, and effect size testing with SPSS 25. The study results indicated a significant improvement in students' reading abilities after using the smart box media. The experimental group had average pretest and posttest scores of 58.16 and 87.64, respectively, while the control group had scores of 58.84 and 70.68, respectively. Hypothesis testing was conducted at a significance level of 0.05. The analysis of posttest data using the independent samples test in IBM SPSS Statistics 25 yielded a value of 0.000 < 0.05, leading to the acceptance of H1 and rejection of H0. The effect size test indicated that the smart box media had a strong effect, with a value of 2.3. Therefore, it can be concluded that the smart box media positively impacts the reading abilities of Class I at students at SD Negeri Kasongan.
Jarak Optimum Tie Constraint at Screws pada Cold-Formed Steel Built-Up Box Beams dengan Four-Point Flexural Loading Swastika, Tri Widya; Purnomo, Heru; Ashadi, Henki Wibowo; Sukarno, Praganif
RekaRacana: Jurnal Teknik Sipil Vol 11, No 3: November 2025
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v11i3.231

Abstract

ABSTRAKCold-formed steel (CFS) memiliki sejumlah keunggulan: antara lain kekuatan tinggi, ringan, pemasangan cepat dan praktis, tahan terhadap kebakaran, daya tahan yang baik, serta dapat didaur ulang. Namun, balok dengan penampang terbuka yang umum digunakan pada konstruksi rentan terhadap ketidakstabilan akibat ketidaksamaan letak titik geser dan titik berat. Untuk mengatasi permasalahan tersebut, salah satu solusi yang banyak digunakan adalah penggunaan balok dengan built-up section. Penelitian ini menyajikan studi eksperimental mengenai pengaruh variasi jarak tie constraint at screws pada CFS built-up box beams terhadap pembebanan lentur empat titik. Enam spesimen balok dengan bentang 1.300 mm diproduksi dari profil C75×35 dengan tebal 0,75 mm; kemudian dirakit secara berhadapan menjadi penampang kotak dengan menggunakan self-drilling screw yang dipasang sepanjang sayap untuk berfungsi sebagai tie constraint at screws. Tiga konfigurasi jarak sekrup digunakan, yaitu H; 2H; dan 5,5H; dengan H adalah tinggi penampang. Semua pengujian dilakukan pada kondisi tumpuan sederhana. Hasil pengujian menunjukkan bahwa variasi jarak tie constraint at screws berpengaruh signifikan terhadap perilaku lentur CFS built-up box beams. Berdasarkan hasil yang diperoleh, jarak sekrup 5,5H direkomendasikan untuk aplikasi desain pada kondisi pembebanan lentur empat titik.Kata kunci: cold-formed steel, built-up box beams, jarak tie constraint at screws, eksperimental ABSTRACKCold-formed steel (CFS) has many advantages, including high strength, lightweight, fast and practical installation, durability, recyclable, non-combustibility, and simple manufacturing procedures. However, since the shear center and the centroid of the cross-section do not coincide, open-section beams are prone to instability modes. To address this issue, researchers have used doubly symmetric built-up sections or built-up closed sections beams. This study presents an experimental investigation on CFS built-up box beams with varying screw spacing arrangements. Six beam specimens; each with a span of 1,300 mm; were subjected to four-point bending tests. The beams were fabricated from C75×35 profiles with a thickness of 0.75 mm, assembled face-to-face into built-up box sections using self-drilling screws positioned along the flanges to act as tie constraint at screws. Three screw spacing configurations were considered—H, 2H, and 5.5H—where H denotes the section depth. All tests were conducted under simple support conditions. Findings indicate that screw spacing significantly influences the flexural behavior of CFS built-up box beams. Based on the outcomes, a screw spacing of 5.5H is recommended for design applications under four-point bending conditions.Keywords: cold-formed steel, built-up box beams, tie constraint at screws spacing, experiment
KAJIAN KUAT TEKAN BETON RINGAN TIDAK TERKEKANG BERAGREGAT KASAR POLIPROPILENA DILAPISI PASIR Waoma, Adolf; Purnomo, Heru; Musalamah, Sittati
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7522

Abstract

This study aims to determine the compressive strength, density, and crack pattern of lightweight concrete utilizing polypropylene coated with sand as coarse aggregate and Tayan sand as fine aggregate. The research employs three mix design clusters based on the water-to-cement ratio (w/c): Cluster A with a w/c ratio of 0.347, Cluster B with a w/c ratio of 0.339, and Cluster C with a w/c ratio of 0.319. Cylinder-shaped specimens measuring 15×30 cm were prepared for each cluster. For the 15×30 cm cylinder specimens, the average compressive strength obtained was 21.69 MPa, 22.15 MPa, and 24.53 MPa for Clusters A, B, and C, respectively, with standard deviations of 0.59, 0.49, and 1.51. The density of lightweight concrete was recorded as 1717.54 kg/m³, 1689.17 kg/m³, and 1802.93 kg/m³ for Clusters A, B, and C, respectively. The observed crack pattern corresponds to Type 3, in reference to ASTM C39. Keywords: Lightweight Concrete; Polypropylene; Tayan
The Eksperimental Study of Cold Form Steel Closed Box Section 32 mm x 31 x 0,3 mm Under 3 Point Flexural Loading Test Utami, Ghina; Purnomo, Heru; Swastika, Tri Widya
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7542

Abstract

Cold-formed steel materials are widely used in the construction industry. One such application is closed box cold-formed steel beams, which are commonly used as battens in ceiling structures. Cold-formed steel is produced through cold roll forming or bending processes, resulting in folds along the profile. This study aims to investigate the effects of these folds on stiffness, deflection, ductility, and failure patterns. A total of 18 specimens, with lengths of 500 mm and 1100 mm, were tested using three-point bending tests. The folds were varied in location: placed in the top area, bottom area, and the side area. Tensile coupon tests were also testing to determine the material properties of the cold-formed steel. The results show that beams with a length of 500 mm can carry greater vertical loads compared to those with a length of 1100 mm. Additionally, the displacement and rotation observed in the 500 mm beams were smaller than those in the 1100 mm beams, which more significant deflection and rotation. Beams with folds located in the top area and bottom area shower greater load-carry capacity than those with folds in the web area. The failure patterns of the 500 mm beams were dominantly characterized by excessive deformation in the bottom are due to vertical loading. Similar deformation was observed in the 1100 mm beams. This excessive deformation occurred beneath the point of vertical load application with a roller-type support. Momen capacity of the experimental test results was also compared with the theoretical calculation using the Direct Strength Method, the results showed a comparative value that was almost close, but it is better to modify the formula to the theoretical formula of the Direct Strength Method for cross-sections with folds.
The EXPERIMENTAL STUDY OF COLD-FORMED STEEL CLOSED BOX SECTION 32 MM X 31 MM X 0,3 MM BEAM ON 4-POINT FLEXURAL LOADING Pregawati, Dyah Ayu; Purnomo, Heru
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7543

Abstract

This study evaluates the effect of beam length and fold position on the flexural performance, deflection, and failure pattern of closed-box cold-formed steel beams with dimensions of 32 mm × 31 mm × 0.3 mm under four-point bending tests. A total of 18 specimens were tested using this method with two length variations, 500 mm and 1100 mm, and fold positions located either on the top flange, bottom flange, or side web. The results show that the 500 mm beams were able to carry greater vertical loads compared to the 1100 mm beams, with smaller mid-span deflections and relatively smaller rotation. In contrast, the 1100 mm beams experienced more significant mid-span deflections and rotations. The presence of folds on the top or bottom flanges increased the beam’s vertical load-carrying capacity by approximately 10% to 15% compared to when the fold was placed on the side web. The failure pattern of the shorter beams was dominated by excessive deformation on the upper part of the beam due to vertical loading, and similar deformation was also observed in the longer beams. This excessive deformation occurred beneath the vertical load application point near the roller support. In addition, comparison with the Direct Strength Method (DSM) revealed that DSM predicted higher flexural moment capacities than those obtained from experiments, M experiment / MDSM ratios ranging from 0.33–0.45 for 500 mm spans and 0.49–0.54 for 1100 mm spans. These results indicate that DSM is more conservative for shorter beams and can serve as a safe preliminary approach for designing cold-formed steel beams subjected to four-point bending.
Potensi Implementasi Pendekatan Deep Learning dalam Pembelajaran Numerasi di Kelas 4 Sekolah Dasar Nurahmadani, Anisa; Purnomo, Heru
Pendagogia: Jurnal Pendidikan Dasar Vol 5 No 2a: Oktober 2025
Publisher : Educational Consultant & Counseling Career (EC3) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Numeracy skills are an important component of mathematical literacy that need to be instilled from an early age so that students are able to face real-life problems logically and systematically. However, the reality on the ground shows that numeracy learning at the elementary school level still faces various obstacles, particularly in terms of learning approaches that do not fully encourage active involvement and in-depth student understanding. This study aims to describe the real conditions of numeracy learning implementation in fourth grade elementary schools based on observations and interviews, and explore the possibility of implementing a deep learning approach as an innovative strategy that is adaptive to the learning needs of 21st-century students. The study was conducted using a descriptive qualitative approach, through observations of numeracy learning and semi-structured interviews with class teachers. The results of the study indicate that conventional approaches are still dominant, with low student engagement and limited understanding of numeracy concepts, especially in fractions. Nevertheless, there are positive indications that the use of visual media and contextual activities can increase student enthusiasm and participation. These findings indicate that the deep learning approach has the potential to be integrated into numeracy learning, provided it is supported by increased teacher capacity and the provision of adequate digital learning infrastructure.
Co-Authors Abidin, Nurul Achmad, Mohammad Adhela Septiria Wardani Afiqoh Agustin Agus Pamuji Ajeng Titah Normawati Anggraeni, Levina Anisa Nur Rahma Anjarwati, Nely Anjelin, Anggela Ermitha Arel Sabila, Thifan Ariffia, Citrani Natha Arini, Srikandi Wahyu Ariyani, Silvia Aulia Wijayanti, Luluk Dina Azzahra, Melia Ceda, Katarina Aprillia darwan darwan, darwan Devi Anggraini Dewanti, Luthfia Nilam Dewi, Melani Dhiniaty Gularso Dian Fitriyani Dian Puspita Djoeli Satridjo Dorce Sisfiani Sarimin Elly Tjahjono, Elly Epi Saptaningrum Faizatul Muna, Faizatul Muna Farhatuaini, Lia Fatah Zahrasiwi, Reiki Findy Yonanta, Apriliya Fitriya, Fathul Laila Galih Dani Septiyan Rahayu Hadi Suyono Henki W Ashadi Imam Jauhari Maknun, Imam Jauhari Irwan Katili, Irwan Istiqomah Kardi, Tanti Indriyani Kartadarma, Supriyatni KATNI KATNI, KATNI Komalasari, Mahilda Dea Lukitoaji, Beny Dwi Melinda, Tika Morin Prita Laura Mu'awanah, Mu'awanah Muawanah Muawanah Mudhofar, Mohammad Nur Mudhofar, Muhamad Nor Muhammad Amien, Muhammad Amien Muhammad Ridho Mumtaza, Nadhila Dzikrina Munawaroh, Raden Roro Zakiyah Murdono, Feryandy Musalamah, Sittati Natasah, Sintia Ngurah Ayu Nyoman Murniati Noor Miyono Nugraha, Febby Fajar Nur Khasanah, Fitria Nurahmadani, Anisa Nurizka, Rian Nurul Bahiyah Olanda, Viona Perwitasari, Ningrum Pradita, Erni Praganif Sukarno Pregawati, Dyah Ayu Primastuti, Kurnia Pawestri Purnomo, Sidiq Rahma, Fitri Nur Ramadhani, Dina Suci Ramdhani, Fitri Galuh Ratna Widyawati Rigianti, Henry Aditia Rini Nur Hasanah Rusita Purnamasari Safira, Utin Trisna Saluky Selly Distian Cahya Siti Utami Dewi, Siti Utami Sitirahayu, Sitirahayu Soekarno, Praganif Suhardono Suhardono Sumartono, Ignatius Harry Suradi Efendi Susilo Wirawan Tri Widya Swastika, Tri Widya Triana Rahmawati Triyono, Agung Utami, Ghina Vidliana, Tantri Wahyu Kurniawati Waoma, Adolf Wati, Ririn Asma Widyastuti, Ani widya_ningrum, wiyanda Wijayanti, Luluk Dina Aulia Yasminda, Fitria Ika Ari Yudhistari, Elsa Yulianto, Tomi Yuni Astriani Zela Septikasari, Zela