Judul: The Use of Household Organic Waste as Magot Living Media and the Use of Magot as Animal Feed
Abstrak: Sampah organik banyak dihasilkan dari aktivitas manusia dalam kehidupan rumah tangga. Jumlah sampah organik yang melimpah berpotensi menghasilkan gas metana sebagai penyebab terjadinya pemanasan global dan menimbulkan bau yang menyengat, sehingga mencemari lingkungan. Budi daya magot dapat dijadikan solusi dalam penguraian sampah organik, sehingga jumlah sampah yang terangkut ke tempat penimbunan akhir dapat tereduksi. Limbah organik yang digunakan ialah sampah dapur rumah tangga yang difermentasi dengan probiotik EM4 dan dedak padi difermentasi probiotik EM4; yakult sebagai media pembanding. Penelitian ini bertujuan memanfaatkan limbah organik rumah tangga sebagai media pertumbuhan magot, menggunakan magot sebagai alternatif pakan ternak, dan mendapatkan hasil samping berupa pupuk organik (kasgot). Hasil eksperimen berupa tepung magot dengan kandungan protein 30,15–31,49% dan kasgot dengan kandungan nitrogen 0,52–1,19%. Magot berpotensi sebagai alternatif pakan ayam karena mengandung protein yang tinggi, sedangkan kasgot belum dapat digunakan sebagai campuran media tanam karena kandungan nitrogennya rendah, sehingga kurang optimal untuk pertumbuhan tanaman., Human activities in daily life produce a large amount of organic waste. With so much garbage, it may produce methane gas, which contributes to global warming and causes odors, harmful for the ecosystem. The use of magot as a decomposition aid for organic waste can help to reduce the amount of garbage sent to landfills. Household kitchen waste fermented with EM4 probiotic, fermented rice husk with EM4 probiotic, and yakult as a comparative medium were employed as organic wastes. The research aims to use household organic waste as a substrate for magot development, to use magot as an alternative animal feed, and to harvest by-products as organic fertilizer (kasgot). Magot flour has a protein level of 30,15–31,49% and kasgot had a nitrogen content of 0,52–1,19%, according to this experiments. Because of its high protein content, magot can be utilized as a substitute for chicken feed. In contrast, kasgot cannot be used as a planting medium mix due to its low nitrogen concentration, making it unsuitable for plant growth.
Keyword: magot, probiotik, sampah organik, organic waste, probiotic

Judul: EVALUATION OF HIGH PROTEIN FEEDING IN IMPROVING MAGGOT PRODUCTIVITY
Abstrak: Maggot dapat dijadikan pakan alternatif sebagai pakan sumber protein hewani karena maggot memiliki kandungan nutrisi yang baik terutama pada kadar protein yang tinggi dan mudah ditemukan serta dikembangkan. Penelitian ini bertujuan membandingkan media tumbuh maggot dari bahan organik dengan formula pakan tinggi protein. Penelitian ini menggunakan rancangan acak lengkap dengan 2 perlakuan dan 4 ulangan. Perlakuan yang digunakan adalah P0 (pakan kontrol limbah buah dan limbah rumah tangga) dan P1 (pakan konsentrat protein tinggi). Pakan kontrol dan perlakuan protein tinggi diberikan sebanyak 13 kg selama pemeliharaan. Parameter yang diukur adalah konsumsi (gram), reduksi substrat (%), total biomassa akhir (g), jumlah maggot, bobot maggot (gram), indeks pengurangan limbah (%), FCR dan biokonversi (%). Data dianalisis menggunakan uji T sampel berpasangan. Hasil penelitian menunjukkan bahwa larva BSF yang diberi perlakuan protein tinggi berpengaruh nyata (P<0,05) dibandingkan dengan pakan kontrol untuk parameter FCR namun untuk larva yang diberi perlakuan protein tinggi nyata lebih rendah untuk parameter konsumsi pakan, reduksi substrat, total biomassa akhir, jumlah maggot, bobot maggot, WRI, dan biokonversi larva. Kesimpulan dari penelitian ini pemberian pakan maggot menggunakan media tumbuh organik dan ransum buatan protein tinggi menghasilkan performa, biokonversi, nilai pengurangan limbah yang sama. Perlakuan bahan organik dan ransum protein tinggi menghasilkan FCR yang berbeda., Maggot can be used as an alternative feed as a source of animal protein because maggot has good nutritional content, especially at high protein levels and is easy to find and develop. This study aims to compare maggot growing media from organic materials with high protein feed formulas. This study used a completely randomized design with 2 treatments and 4 replicates. The treatments used were P0 (fruit waste control feed and household waste) and P1 (high protein concentrate feed). The control feed and high protein treatment were given as much as 13 kg during maintenance. Parameters measured were consumption (grams), substrate reduction (%), final total biomass (g), maggot number, maggot weight (grams), waste reduction index (%), FCR and bioconversion (%). Data were analyzed using paired sample T test. The results showed that BSF larvae treated with high protein had a significant effect (P<0.05) compared to the control feed for FCR parameters, but the larvae treated with high protein were significantly lower for the parameters of feed consumption, substrate reduction, total final biomass, maggot number, maggot weight, WRI, and larval bioconversion. The conclusion of this study is that maggot feeding using organic growing media and high protein artificial rations produces the same performance, bioconversion, waste reduction value. The treatment of organic matter and high protein rations resulted in different FCR.
Keyword: Biokonversi, limbah, maggot, pakan alternatif, produktifitas

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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