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All Journal Global Medical and Health Communication 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

Furnitur kardus berkembang sebagai solusi alternatif yang ringan, mudah dirakit, dan efisien untuk penggunaan sementara. Namun, keterbatasan struktural kardus, terutama pada sambungan antar panel, membuatnya rentan terhadap deformasi dan kerusakan akibat gaya eksternal. Penelitian ini bertujuan untuk merancang dan mengembangkan fitting sebagai komponen sambungan untuk mengoptimalkan kestabilan dan kekuatan furnitur kardus. Pengembangan fitting dilakukan menggunakan teknologi pencetakan 3D metode Fused Deposition Modeling (FDM) dengan mesin MakerBot Replicator 2 dan filamen PLA MakerBot. Dalam penelitian ini, dua desain fitting dikembangkan, yaitu desain simetris dan desain asimetris, yang kemudian dibandingkan untuk menentukan desain yang paling optimal. Metode Finite Element Analysis (FEA) digunakan untuk menganalisis kekuatan struktural pada kedua desain tersebut. Hasilnya menunjukkan bahwa desain simetris memiliki ketahanan lebih baik terhadap gaya tarik dibandingkan desain asimetris. Pada desain simetris, tensile strength (62 MPa) tercapai pada gaya tarik 46 N, sementara desain asimetris hanya mencapai 44 N. Berdasarkan hasil ini, desain simetris dipilih sebagai dasar pengembangan 17 varian modul, yang terdiri dari modul sambungan tepi dan modul sambungan sudut, dengan konfigurasi yang beragam. Varian modul ini dapat menghasilkan berbagai macam mekanisme sambungan struktur dalam sistem perakitan furnitur kardus serta dapat diaplikasikan pada furnitur kardus yang sudah ada sebagai aksesori untuk mengoptimalkan strukturalnya.
Co-Authors Dian Widiawati Fauziah, Nisa Lia Faridah Maulana, Abdul Gafur Nur, Christmastuti Ramadhani Eka Putra Savira Ekawardhani Watanabe, Kozo