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All Journal Medical Journal of Indonesia Majalah Kulit, Karet, dan Plastik Metal Indonesia Buffer Informatika STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Prosiding SNTTM
Sugeng Supriadi, Sugeng
Departemen Teknik Mesin, Fakultas Teknik, Universitas Indonesia, Kampus UI Depok, 16424
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology

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Pengaruh kecepatan drum proses terhadap sifat fisik kulit kambing untuk sarung tangan golf Supriadi, Sugeng; Purnomo, Eddy; Meiyanti, Meiyanti
Majalah Kulit, Karet, dan Plastik Vol 12, No 25 (1998): Majalah Barang Kulit, Karet, dan Plastik
Publisher : Center for Leather, Rubber, and Plastic Ministry of Industry, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (912.92 KB) | DOI: 10.20543/mkkp.v12i25.357

Abstract

Fifteen pieces of wet blue were devided into three groups of equal number of pieces. All of the group were processed into glove leather with drum rotational speed of 15 RPM and 25 RPM resfectively. Analysis of varians showed that the speed effected the tensile strength, tensile stretch, elongation, and tear strength of the leather obtained. The leather processed at 25 RPM gave the highest tensile strength (138,56 kg/cm2) tensile stretch (29,30 mm), elongation (58,60%), and tear strength (30,53 kh/cm).   INTISARI Penelitian ini bertujuan untuk mengetahui pengaruh kecepatan drum terhadap sifat fisik kulit sarung tangan. Lima belas lembar kulit wet blue dibagi menjadi tiga kelompok yang sama jumlahnya. Masing-masing kelompok diproses menjadi kulit sarung tangan dengan variasi kecepatan drum 15 RPM, 20 RPM, dan 25 RPM. Analisa variansi menunjukkan terdapat perbedaan nyata diantara perlakuan terhadap kekuatan tarik, pertambahan mulur, persen pertambahan mulur dan ketahanan sobek. Hasil penelitian menunjukkan bahwa kulit yangdiputar dengan kecepatan 25 RPM memberikan nilai rata-rata tertinggi pada kekuatan tarik, pertambahan mulur, persen pertambahan mulur, dan ketahanan sobek masing-masing sebesar 138,56 kg/cm2, 29,30 mm, 58,60 % dan 30,53 kg/cm
RANCANGBANGUN GAME EDUKASI PENGENALAN HURUF HIJAIYAH DENGAN GAME EGINE CONSTRUCT 2 Supriadi, Sugeng
BUFFER INFORMATIKA Vol 4, No 1 (2018)
Publisher : TI S1 FKOM UNIKU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25134/buffer.v4i1.1136

Abstract

AbstrakGame edukasi merupakan sebuah permainan dibuat dan dirancang khusus untuk dijadikan sebuah media yang digunakan untuk mengajar orang melalui materi yang berisikan suara, teks, gambar, video, dan animasi, yang pokok materinya membahas suatu subjek tertentu, yang memiliki tujuan untuk dapat memperluas konsep, memberikan pemahaman yang lebih baik dari materi yang mengajarkan sebuah peristiwa sejarah maupun budaya. Huruf hijaiyah adalah Dalam Kamus Besar Bahasa Indonesia kata hijaiyah berarti “system aksara Arab; Abjad Arab”. (Departemen Pendidikan Nasional, Op. Cit., hlm. 401). Agar bisa membaca Al-Qur’an, kita perlu mengenali huruf-huruf hijaiyah, bagaimana bentuknya dan cara membacanya. penulis merasa tertarik untuk meneliti dengan menerapkan pola Game Edukasi dengan pembelajaran huruf hijaiyah. Sehingga dalam proses belajar mengenal huruf hijaiyah tidak merasa jenuh dan semakin tertarik dan tahu bagaimana melafad kannya dengan baik dan benar. peneliti merancang sebuah game edukasi pengenalan huruf hijaiyah dengan judul “Rancangbangun Game Edukasi Pengenalan Huruf Hijaiyah Dengan Game Egine Construct 2.Kata Kunci : Game Edukasi, Huruf Hijaiyah, Construct2.
Pemilihan Material Rangka Kendaraan Pemanen Jagung Kombinasi dengan Metode CRITIC, Digital Logic dan TOPSIS Martin Doloksaribu; Agus Juniawan Khairi; Muhammad Fathurrohman; Sugeng Supriadi
Jurnal Metal Indonesia Vol 43, No 2 (2021): Metal Indonesia
Publisher : Balai Besar Logam dan Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32423/jmi.2021.v43.67-76

Abstract

Desain rangka kendaraan pemanen jagung kombinasi menuntut rangka kendaraan yang memiliki berat dan kekuatan yang efisien selain kriteria sifat lain yang perlu dipertimbangkan. Pemilihan material dengan banyak kriteria merupakan hal rumit dan memerlukan metode yang tepat untuk meningkatkan probabilitas keberhasilan produk. Pemilihan material rangka kendaraan pemanen jagung kombinasi dilakukan dengan metode CRITIC, Digital Logic dan TOPSIS. Bobot kriteria dihitung dengan metode CRITIC dan Digital Logic. Kandidat material diurutkan dengan metode TOPSIS. Kandidat material terdiri dari dua golongan material yaitu aluminium dan baja struktur. Urutan pertama dengan bobot kriteria metode CRITIC dan metode DL adalah A7075-T6. Urutan kedua dengan metode CRITIC adalah A6061-T6 dan dengan metode DL adalah SSA710. Metode pemilihan material yang tepat dapat memberikan urutan material yang handal.Desain rangka kendaraan pemanen jagung kombinasi menuntut rangka kendaraan yangmemiliki berat dan kekuatan yang efisien selain kriteria sifat lain yang perlu dipertimbangkan.Pemilihan material dengan banyak kriteria merupakan hal rumit dan memerlukan metode yang tepatuntuk meningkatkan probabilitas keberhasilan produk. Pemilihan material rangka kendaraanpemanenjagung kombinasi dilakukan dengan metode CRITIC, Digital Logic dan TOPSIS. Bobot kriteriadihitung dengan metode CRITIC dan Digital Logic. Kandidat material diurutkan dengan metodeTOPSIS. Kandidat material terdiri dari dua golongan material yaitu aluminium dan baja struktur.Urutan pertama dengan bobot kriteria metode CRITIC dan metode DL adalah A7075-T6. Urutankedua dengan metode CRITIC adalah A6061-T6 dan dengan metode DL adalah SSA710. Metodepemilihan material yang tepat dapat memberikan urutan material yang handal.
Studi Pengembangan Komponen Implan Paduan Ti6Al4V untuk Aplikasi Biomedis dengan Proses Metal Injection Molding Dea Anggraheni Pusparasmi; Bambang Suharno; Sugeng Supriadi
STRING (Satuan Tulisan Riset dan Inovasi Teknologi) Vol 6, No 1 (2021)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (574.606 KB) | DOI: 10.30998/string.v6i1.10033

Abstract

Titanium alloy Ti6Al4V is a material that has a combination of mechanical properties required for implants such as good ductility, high corrosion resistance and good biocompatibility, so it is widely used as a material for biomedical implant applications. One method that is currently widely used to produce Ti6Al4V implants is by using the metal injection molding (MIM) process. The MIM process is widely used because it can produce parts more effectively, and low-cost production. One of the important factors in the MIM process is the powder loading of metal powders and the binder system used as feedstock material. So, it is necessary to conduct further studies and in-depth literature review related to this matter. Literature search using the ScienceDirect, a digital database and limited to year 2011-2020. The results of the study show that both the binder and powder loading systems have an influence on the mechanical properties of the injection product, the results are evident that the viscosity of the feedstock decreases with the increase in the shear rate.
Radiological and histological assessment of a novel interlocking three-dimensional miniplate for mandibular angle fractures: an animal study Kreshanti, Prasetyanugraheni; Noviana, Deni; Priosoeryanto, Bambang Pontjo; Kekalih, Aria; Rahyussalim; Supriadi, Sugeng; Hatibie, Mendy Juniaty; Sukasah, Chaula Luthfia
Medical Journal of Indonesia Vol. 33 No. 4 (2024): December
Publisher : Faculty of Medicine Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13181/mji.oa.247567

Abstract

BACKGROUND Open reduction and internal fixation are considered the gold standard for managing mandibular fractures, as they effectively restore anatomical structure and functionality. Three-dimensional (3D) miniplates were developed to obtain a geometrically stable structure. However, the rigid structure of 3D miniplate may cause screw holes to be located within the fracture lines or directly above important anatomical structures. Hence, we have developed customizable interlocking 3D miniplates that allow for modifications in the configuration of the horizontal miniplates and vertical cross-struts to meet specific requirements. METHODS This study included 24 goats divided into 2 groups: interlocking 3D miniplate and standard plate. Each group was further divided into subgroups sacrificed on Days 5, 28, and 56. Radiological assessments were performed to evaluate bone, muscle, peri-implant bone, and peri-implant muscle density. Histological assessments were performed using Masson's trichome (MT) for bone healing evaluation and hematoxylin and eosin (H&E) staining for biocompatibility. RESULTS Radiological assessment indicated an increase in density across all measured parameters from Day 5 to 56. Histological evaluation from MT staining showed a significantly higher fibrocartilage in the interlocking 3D miniplate group (6.109%, IQR 1.453–10.828) compared to standard plate (1.311%, IQR 0.636–2.553; p = 0.001). Furthermore, H&E staining showed significantly higher inflammatory cell counts in the standard group on Days 28 and 56 compared to the interlocking 3D miniplate group (p = 0.027). CONCLUSIONS This study concluded that the interlocking 3D miniplate showed better bone healing properties and biocompatibility than the standard plate.
Investigation of chessboard scanning strategy in selective laser melting of ti6al4v Amirah Salsabila Widad Putri; Supriadi, Sugeng; Suharno, Bambang
Prosiding SNTTM Vol 23 No 1 (2025): SNTTM XXIII October 2025
Publisher : BKS-TM Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71452/j8jemj90

Abstract

Selective Laser Melting (SLM) is recognized as a technology capable of producing metallic components with advantages in geometric flexibility and consistency of mechanical properties. mong the various alloys processed through SLM, titanium alloy Ti6Al4V is particularly attractive due to its superior strength-to-weight ratio, corrosion resistance, and thermal stability. Nevertheless, the quality of as-SLM Ti6Al4V parts is strongly affected by the selection of process parameters. In particular, the laser scanning strategy plays a decisive role in governing energy distribution, thermal gradients, and subsequent microstructural evolution during fabrication. One of the scanning approaches, the chessboard strategy, has gained significant attention because it subdivides the building area into smaller islands that are scanned alternately, reducing scan length and promoting more uniform heat distribution. This study investigates the application of the chessboard strategy in fabricating cylindrical Ti6Al4V specimens, with process maintained constantly. The fabricated geometry exhibited good agreement with the original design, confirming the capability of SLM to reproduce complex features under controlled conditions. Surface characterization revealed protrusions on the top surface (upskin), attributed to excess energy accumulation at the end of scan tracks, while fine wavy-bulgy patterns were observed on the lateral surfaces due to overlapping melt pools and re-solidified particles. The measured average surface roughness (Ra) was 4.275 ± 0.655 µm, falling within an acceptable range for SLM-fabricated components. In addition, scanning electron microscopy (SEM) analysis revealed the presence of lack-of-fusion porosity, indicating localized imperfections in powder melting and consolidation. Overall, the findings highlight that the chessboard scanning strategy not only influences thermal distribution but also directly affects surface morphology and porosity characteristics, providing essential insights for optimizing as-SLM Ti6Al4V.
Co-Authors Agus Juniawan Khairi Amirah Salsabila Widad Putri Aria Kekalih Bambang Irawan Bambang Pontjo Priosoeryanto Bambang Suharno Bambang Suharno Dea Anggraheni Pusparasmi Deni Noviana Eddy Purnomo Gunawan Gunawan Hatibie, Mendy Juniaty Heri Sulistyo Budhi, Heri Jos Istiyanto Kreshanti, Prasetyanugraheni Marsetio, Aldo Fransiskus Martin Doloksaribu Meiyanti Meiyanti, Meiyanti Muhammad Fathurrohman Pribadi, Pancar Muhammad Rahyussalim Rahyussalim Rahyussalim, Rahyussalim Sukasah, Chaula Luthfia Tito Sitanggang, Tito Tito Winnerson Sitanggang, Tito Winnerson Tjokro Prasetyadi, Tjokro Yanuar Yanuar, Yanuar Yudan Whulanza