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Online communities of practice as agricultural information platforms : a case study of Indonesian shrimp farmers during the covid-19 pandemic
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| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Bies: Bulletin of Indonesian Economic Studies |
| Volume / Edisi | : | 61 (No. 1) |
| Halaman | : | 123–158 |
| Abstrak | : | Amid the challenges of the Covid-19 pandemic, this study examines the potential of online communities of practice (OCoPs) to provide agricultural extension services. Using a unique data set of 1,574 shrimp farmers, including members of one of Indonesia’s largest public OCoP Facebook groups, we found that, despite the pandemic, Indonesian farmers continue to rely primarily on their neighbours for farming information, utilising OCoPs only as a complementary resource. This reliance may stem from the fragmented and codified nature of information shared by OCoP members, making it challenging to access specific and useful farming information, particularly on shrimp disease, and difficult to revalidate practices in the field. Consequently, farmers prefer to observe their neighbours’ practices and replicate their farming success, given similar ecological prerequisites. To compensate for these shortcomings, it is recommended that context-specific and timely information from conventional extension services be integrated into OCoPs |
Peristiwa Kentong Gobyok: Di Antara Mengingat Sekaligus Melupakan Kekerasan 1965 di Klaten, Jawa Tengah
| Pengarang | : | Kuncoro Hadi, F.X. Domini B.B. Hera |
| Nama Majalah/Jurnal | : | Bandar Maulana |
| Volume / Edisi | : | 25 (No. 1) |
| Halaman | : | 1-11 |
| Abstrak | : | Kajian ini berfokus pada ingatan sekaligus pelupaan dari peristiwa kentong gobyok, sebuah kekerasan pasca G30S 1965 di Klaten. Peristiwa tersebut menjadi penanda memori di antara pihak-pihak yang berseteru pada masa itu, yakni eks tapol dan Pemuda Marhaen yang mengikuti rivalitas dari kedua partai afiliasi mereka di Klaten, yakni PKI dan PNI. Kajian ini memiliki tiga rumusan masalah. Pertama, bagaimana kronologi peristiwa kentong gobyok terjadi di antara semua pihak yang terkait? Kedua, sejauh mana pembelahan ingatan pasca peristiwa kentong gobyok? Ketiga, mengapa ada memori yang diingat sekaligus dilupakan oleh masing-masing pihak yang dahulu pernah berseteru? Kajian ini menggunakan teknik penelitian sejarah dengan memanfaatkan sumber sejarah dan wawancara dengan para pelaku peristiwa maupun saksi mata yang terlibat. Kajian ini berguna untuk memperkaya studi sejarah dan politik memori pada studi kekerasan 1965 yang menjadi ujian sejarah bagi bangsa Indonesia. Memahami aspek kejadian pada waktu peristiwa berlangsung, pembelahan memori hingga rekonsiliasi yang memiliki tumpang tindih ingatan menjadi kunci untuk mengurai kompleksitas trauma dan membuka peluang daya penyembuh luka batin bagi mereka yang telah terstigma. |
REFLEKSI TENTANG HUBUNGAN MANUSIA DAN TEKNOLOGI MENJELANG AKHIR ABAD XX
| Pengarang | : | Witjaksana Tjahjana |
| Nama Majalah/Jurnal | : | Bina Darma |
| Volume / Edisi | : | 13-48 (No. 48) |
| Halaman | : | 55-62 |
| Abstrak | : | Abstrak tidak tersedia. |
A DOMAIN DECOMPOSITION METHOD FOR SOLUTION OF A PDE-CONSTRAINED GENERALIZED NASH EQUILIBRIUM MODEL OF BIOFILM COMMUNITY METABOLISM
| Pengarang | : | Klaper, Isaac [et al...] |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 84 (No. 1) |
| Halaman | : | 97-113 |
| Abstrak | : | Microbes are able to deploy different strategies in response to, and depending upon, local environmental conditions. In the setting of a microbial community, this property induces a Nash equilibrium problem because access to environmental resources is bounded. If microbes are also distributed in space, then those resources are subject to transport limitations (encoded in a PDE) and so microbial strategies at one location influence resources and, hence, microbial strategies, at another. Here we formulate the resulting PDE-coupled generalized Nash equilibrium problem for a multispecies biofilm community, and propose a domain-decomposition-based method for its solution. An example consisting of a model with two microbial species biofilm with 33 externally transported chemical concentrations is presented. |
ILMU DAN TEKNOLOGI SEBAGAI IDEOLOGI
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Bina Darma |
| Volume / Edisi | : | 13-48 (No. 48) |
| Halaman | : | 43-54 |
| Abstrak | : | - |
LAYER STRIPPING APPROACH TO RECONSTRUCT SHAPE VARIATIONS IN WAVEGUIDES USING LOCALLY RESONANT FREQUENCIES
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 84 (No. 1) |
| Halaman | : | 75-96 |
| Abstrak | : | This article presents a new method to reconstruct slowly varying width defects in two-dimensional waveguides using one-side section measurements at locally resonant frequencies. At these frequencies, locally resonant modes propagate in the waveguide up to a ``cut-off"" position. In this particular point, the local width of the waveguide can be recovered. Given multifrequency data measured on a section of the waveguide, we perform an efficient layer stripping approach to recover, section by section, the shape variations. It provides an L infinity-stable method to reconstruct the width of a slowly monotonous varying waveguide. We validate this method on numerical data and discuss its limits. |
INTERVENSI PENGEMBANGAN USAHA KECIL DI INDONESIA: DILEMA ANTARA GLOBALISASI DENGAN BIROKRATISASI
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Bina Darma |
| Volume / Edisi | : | 13-48 (No. 48) |
| Halaman | : | 30-42 |
| Abstrak | : | - |
NONLINEAR MONOTONE ENERGY STABILITY OF PLANE SHEAR FLOWS: JOSEPH OR ORR CRITICAL THRESHOLDS
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | Siam Journal On Applied Mathematics |
| Volume / Edisi | : | 84 (No. 1) |
| Halaman | : | 60-74 |
| Abstrak | : | Critical Reynolds numbers for the monotone exponential energy stability of Couette and Poiseuille plane flows were obtained by Orr in 1907 [Proc. Roy. Irish Acad. A, 27 (1907), pp. 9-68, 69-138] in a famous paper, and by Joseph in 1966 [J. Fluid Mech., 33 (1966), pp. 617 621], Joseph and Carmi in 1969 [Quart. Appl. Math., 26 (1969), pp. 575-579], and Busse in 1972 [Arch. Ration. Mech. Anal., 47 (1972), pp. 28-35]. All these authors obtained their results applying variational methods to compute the maximum of a functional ratio derived from the Reynolds-Orr energy identity. Orr and Joseph obtained different results; for instance, in the Couette case Orr computed the critical Reynolds value of 44.3 (on spanwise perturbations) and Joseph 20.65 (on streamwise perturbations). Recently in [P. Falsaperla, G. Mulone, and C. Perrone, Eur. J. Mech. B Fluids, 93 (2022), pp. 93-100], the authors conjectured that the search of the maximum should be restricted to a subspace of the space of kinematically admissible perturbations. With this conjecture, the critical nonlinear energy Reynolds number was found among spanwise perturbations (a Squire theorem for nonlinear systems). With a direct proof and an appropriate and original decomposition of the dissipation terms in the Reynolds-Orr identity we show the validity of this conjecture in the space of three-dimensional perturbations. |
MENYIAPKAN KETAHANAN EKONOMI MELALUI INDUSTRI KECIL DAN MENENGAH
| Pengarang | : | Mangara Tambunan |
| Nama Majalah/Jurnal | : | Bina Darma |
| Volume / Edisi | : | 13-48 (No. 48) |
| Halaman | : | 13-29 |
| Abstrak | : | - |
Sphero Mini Sensor Board for First-Year Physics Labs
| Pengarang | : | - |
| Nama Majalah/Jurnal | : | The Physics Teacher |
| Volume / Edisi | : | 62 (No. 5) |
| Halaman | : | 335-338 |
| Abstrak | : | This project originated from the urgent need to transition to remote learning in March 2020 due to the COVID-19 pandemic. The sudden shift to remote instruction provided only a week’s notice, leaving little time to adapt the curriculum. At that time, I resorted to using computer simulations, particularly the PhET Interactive Simulations,1 which I frequently incorporated as teaching aids during lectures. However, it became apparent that simulations alone could not adequately replace hands-on laboratory experiences. Recognizing the importance of practical laboratory work, I aimed to provide my students with authentic lab experiences using tangible equipment. This approach aligns with the 2014 “AAPT Recommendations for the Undergraduate Physics Laboratory Curriculum,”2 which emphasizes the significance of conducting real experiments. As I prepared to teach General Physics I (classical mechanics) in the upcoming fall semester, I recognized the need to promptly begin planning and preparation to ensure the quality and effectiveness of the laboratory component. |