Judul: Desain Aliran Proses dan Tata Letak Unit Pengelolaan Limbah Cangkang Rajungan Terpadu (UPLCT)
Abstrak: Cangkang rajungan merupakan sisa limbah hasil produksi rajungan yang belum termanfaatkan dengan baik sampai saat ini. Namun, cangkang rajungan sebenarnya memiliki potensi nilai tambah yang dapat dimanfaatkan dalam berbagai industri. Kandungan nutrisi yang tinggi menjadikan cangkang berpotensi sebagain pupuk dan juga pakan ternak, kemudian kandungan senyawa bioaktif bisa dijadikan produk kitin dan kitosan. Dalam mencapai nilai tambah yang dinginkan perlu penanganan yang tepat, oleh karena itu di desain unit pengelolaan limbah cangkang rajungan terpadu (UPLCT). Desain aliran proses dan tata letak merupakan aspek penting dalam perencanaan UPLCT, desain aliran proses yang baik dapat mengoptimalkan aliran bahan baku, tenaga kerja dan juga efisiensi waktu. Desain tata letak memperhitungkan aliran proses agar penempatan setiap aktivitas sesuai dengan keterkaitannya masing-masing dan meningkatkan produktivitas kerja. Desain tata letak yang dihasilkan memerlukan area seluas 26m x 21m. Desain aliran proses dalam UPLCT dimulai dari penerimaan bahan baku, pengeringan, pengepresan, pengemasan, dan penyimpanan. Rute penjemputan dari UPLCT ke setiap miniplant menempuh jarak sejauh 4210m. Validasi ke semua pemangku kepentingan, bahwa desain disetujui dan sesuai dengan area yang tersedia., The crab shell is the remaining waste from crab production which has not been utilized properly until now. However, crab shell actually has potential added value that can be utilized in various industries. The high nutritional content makes the shells potentially used as fertilizer and also animal feed, then the content of bioactive compounds can be used as chitin and chitosan products. In achieving the desired added value, proper handling is needed, therefore an integrated crab shell waste management (UPLCT) was designed. Process flow design and layout is an important aspect in UPLCT planning, a good process flow design can optimize the flow of raw materials, labor and also time efficiency. The layout design takes into account the flow of the process so that the placement of each activity is in accordance with their respective relationships and increases work productivity. The resulting layout design requires an area of 26m x 21m. Process flow design in UPLCT starts from receiving raw materials, drying, pressing, packaging, and storage. The pick-up route from UPLCT to each miniplant covers a distance of 4210m. Validation to all stakeholders, that the design is approved and in accordance with the available area.
Keyword: Crab Shell, Layout, Process Flow, UPLCT

Judul: Business Model Design and Financial Feasibility Analysis for UPLCT
Abstrak: Rajungan merupakan salah satu komoditas hasil laut yang memiliki potensi pengolahan yang besar dari hasil daging dan cangkangnya. Pemanfaatan cangkang atau limbah padat rajungan dapat diolah menjadi berbagai jenis produk dengan nilai tambahnya yang berbeda-beda. Limbah padat yang dihasilkan dari pengolahan rajungan memiliki jumlah sebanyak 60% dari total berat rajungan. Hal ini menunjukkan bahwa potensi dari cangkang rajungan ini sangat besar dan perlu dimanfaatkan dengan baik. Permasalahan saat ini dari cangkang rajungan adalah penyebarannya yang tidak merata dan jumlahnya yang beragam. Proyek desain utama ini bertujuan mendesain model bisnis yang kolaboratif yang dapat menyediakan bahan baku cangkang sesuai dengan kebutuhan industri pengolah cangkang. Hasil validasi prototipe menunjukkan bahwa rancangan solusi yang diberikan diterima dan dapat menjawab permasalahan yang ada. Berdasarkan hasil penelitian juga dapat diambil kesimpulan bahwa UPLCT layak untuk dijalankan dilihat dari aspek finansial dengan kriteria nilai NPV lebih dari 0 (Rp201.257.103), IRR lebih dari Suku Bunga Dasar Kredit (SBDK) ritel BRI (8,25%) yaitu 14,67%, B/C Ratio lebih dari 1 (1,3), dan payback period kurang dari asumsi umur proyek 20 tahun (4,93 tahun)., Blue swimming crab is one of the marine product commodities that has great processing potential from its meat and shells. The utilization of crab shells can be processed into various types of products with different added values. The solid waste generated from crab processing accounts for as much as 60% of the total crab weight. This shows that the potential of this crab shell is very large and needs to be utilized properly. The current problem of crab shells is their uneven distribution and varying amounts. This main design project aims to design a collaborative business model that can provide shell raw materials according to the needs of the shell processing industry. The prototype validation results show that the solution design provided is accepted and can answer existing problems. Based on the research results it can also be concluded that UPLCT is feasible to run from a financial perspective with criteria for an NPV value of more than 0 (Rp201,257,103), IRR is more than BRI's retail prime lending rate (SBDK) (8.25%), namely 14.67%, the B/C ratio is more than 1 (1.3), and the payback period is less than the assumed project life of 20 years (4.93 years).
Keyword: Crab shell, Financial, Feasibility

Judul: Pengaruh vaksinasi terhadap dinamika populasi pada model SIR (Susceptible-Infected-Recovered)
Abstrak: SIR model can be used to model the spread of diseases in a closed population based on certain assumptions. In this research, the SIR model is formulated by including the factor of vaccination. As the result, the model has been shown to have two equilibrium points, i.e. disease free and endemic equilibrium. A simulation study is carried out to illustrate the model. The results show that some equilibrium points are asymptotically stable. Moreover, a minimum level of vaccination has been defined. For the vaccination level less than the minimum level, increase in the vaccination level results in decrease of the proportion of infected individuals in the corresponding equilibrium point. On the other hand, for the vaccination level greater than the minimum level, increase in the vaccination level results in decrease the proportion of susceptible individuals in the corresponding equilibrium point. Furthermore, when vaccination level is greater than the minimum level, it is found that the time needed for the disease to extinct is shorter.
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