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All Journal Global Medical and Health Communication PRODUCTUM : Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) The Indonesian Design Journal Jurnal Sains Materi Indonesia
Djati, Imam Damar
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Arts Humanities Dentistry Engineering Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Nursing Public Health

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Arbovirus Detection of Adult Female Aedes aegypti for Dengue Surveillance: a Cohort Study in Bandung City, Indonesia Faridah, Lia; Ekawardhani, Savira; Fauziah, Nisa; Djati, Imam Damar; Putra, Ramadhani Eka; Watanabe, Kozo
Global Medical & Health Communication (GMHC) Vol 11, No 3 (2023)
Publisher : Universitas Islam Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/gmhc.v11i3.12749

Abstract

Dengue surveillance is an important activity to prevent dengue outbreaks. This activity becomes a significant challenge for the region with limited logistic capabilities. Developing a simple mathematical model to predict the possibility of dengue incidence provides a reliable early warning system. This study compared the correlation between vector (adult female Aedes aegypti) and arbovirus detection on a vector to dengue incidence, which generalized linear mixed models tested. The incidence of adult female Aedes aegypti and dengue fever cases were interpolated through third-power inverse distance weighting (IDW). A spatial correlation between female Aedes aegypti incidence and dengue incidence was obtained from polynomial regression. Collection sites were 16 villages in Bandung city, one of the significant dengue endemic areas in January–December 2017. A total of 8,402 mosquitoes of Aedes aegypti, Aedes albopictus, and Culex sp., with 17% belonging to Aedes aegypti as the subject of the dengue virus (DENV) infection test. Data analysis only showed a weak correlation between the numbers of adult female Aedes aegypti and dengue incidence. On the other hand, there is no correlation between positive dengue infection of vector and dengue incidence. This study highlights the importance of constant arbovirus surveillance and integrated surveillance methods on all possible dengue vectors to develop an early warning system for dengue incidence.
Mechanical Properties of Banana Peduncle Fiber Ropes Nur, Christmastuti; Djati, Imam Damar; Widiawati, Dian
Jurnal Sains Materi Indonesia Vol. 27 No. 1 (2025): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2025.9439

Abstract

Banana plants are utilized in almost all parts except for the peduncle due to their hardness and the presence of gum. This research, aimed at evaluating the mechanical properties of banana peduncle fiber, particularly its tensile strength, is significant in exploring the potential of this underutilized part of the plant. The tensile test followed the SNI 12-0064-1987 standard to assess and compare Manila and sisal ropes. Six types of fiber were tested: bleached peduncle fiber, unbleached peduncle fiber, abaca (Manila) fiber, coir fiber, marketed abaca fiber, and marketed coir. The highest average maximum load was found in marketed abaca rope, which measured 346.7 kg. However, this is still below the minimum load standard required by SNI, which is 480 kg. The results of the marketed abaca differ from those of abaca ropes spun using a foot spindle, indicating that the spinning and twisting techniques significantly influence tensile test outcomes. The test also shows that the bleaching process weakens the fiber strength because the unbleached banana peduncle ropes reach a higher average maximum load (92.9 kg) than the bleached banana peduncle ropes (45.2 kg). Moreover, the tensile strength tests revealed that the average breaking load of banana peduncle fiber rope was 92.9 kg, comparable to abaca fiber at 93.7 kg and coir fiber at 92.8 kg. This comparison was based on similar variables: a diameter of 8 millimeters, similar spinning techniques using a foot spindle, and no prior bleaching process. These findings underscore the potential of underutilized banana peduncle fiber ropes as a promising alternative to abaca or coir due to their load-bearing capabilities. It is important to note that the results of this tensile test are comparative rather than absolute.
Pengembangan Desain Fitting untuk Furnitur Kardus dengan Memanfaatkan Teknologi Pencetakan 3D Maulana, Abdul Gafur; Djati, Imam Damar
Jurnal Desain Indonesia. Vol 7 No 02 (2025): Desain untuk Masa Depan : Apa selanjutnya ?
Publisher : Aliansi Desainer Produk Industri Indonesia (ADPII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52265/jdi.v7i02.635

Abstract

Cardboard furniture has emerged as a lightweight, easy-to-assemble, and efficient alternative for temporary use. However, the structural limitations of cardboard, particularly at panel joints, make it susceptible to deformation and damage due to external forces. This study aims to design and develop fittings as joint components to optimize the stability and strength of cardboard furniture. The fittings were developed using 3D printing technology with the Fused Deposition Modeling (FDM) method, utilizing a MakerBot Replicator 2 machine and MakerBot PLA filament. In this study, two fitting designs were developed, namely symmetric and asymmetric designs, which were then compared to determine the most optimal design. Finite Element Analysis (FEA) was used to evaluate the structural strength of both designs. The results showed that the symmetric design exhibited better resistance to tensile forces than the asymmetric design. In the symmetric design, the ultimate tensile strength (62 MPa) was reached at a tensile force of 46 N, while the asymmetric design only reached 44 N. Based on these findings, the symmetric design was selected as the foundation for developing 17 module variants, consisting of edge joints and corner joints with various configurations. These module variants enable diverse structural joint mechanisms in the assembly system of cardboard furniture and can also be applied to existing cardboard furniture as additional accessories to enhance its structural integrity.
Pengembangan desain furnitur kardus modular dengan memanfaatkan fitting berbasis pencetakan 3D Achmad, Abdul Gafur Maulana; Djati, Imam Damar
PRODUCTUM Jurnal Desain Produk (Pengetahuan dan Perancangan Produk) Vol 8, No 2 (2025)
Publisher : Institut Seni Indonesia Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24821/productum.v8i2.14964

Abstract

Modular cardboard furniture is becoming increasingly popular as a practical, economical, and efficient solution for temporary use. However, existing modular cardboard furniture generally relies on a stacking system without a secure locking mechanism, making it less stable in various configurations. Fittings as connector components play a crucial role in enhancing the modularity and stability of cardboard furniture. This study aims to design and develop 3D-printed fittings to optimize the joints between modular cardboard furniture units. In this study, single-wall flute C cardboard was used to develop a modular cardboard shelf unit in the form of a cube with dimensions of 35 × 35 × 35 cm, with holes at each corner to accommodate the fittings. Structural strength testing showed that the module could withstand loads of up to 18 kg before experiencing buckling at the pressure-receiving surface. The fittings were developed using 3D printing technology with the Fused Deposition Modeling (FDM) method, utilizing a MakerBot Replicator 2 printer and MakerBot PLA filament. Finite Element Analysis (FEA) was used to analyze the structural strength of the fittings. The development resulted in 17 modular fitting variants, consisting of edge connectors and corner connectors, with flexible configurations. With these fittings, the configuration of modular cardboard furniture becomes more flexible, stable, and adaptable to user needs. This study contributes to the development of a 3D-printed joint system for cardboard furniture, offering a more optimized solution compared to conventional methods.
Co-Authors Achmad, Abdul Gafur Maulana Dian Widiawati Fauziah, Nisa Lia Faridah Maulana, Abdul Gafur Nur, Christmastuti Ramadhani Eka Putra Savira Ekawardhani Watanabe, Kozo