Judul: Evaluasi Budidaya Stek Sambung Nyawa dengan  Penggunaan Miko-seedcookies
Abstrak: Penelitian ini bertujuan mengevaluasi pertumbuhan dan produksi sambung nyawa yang dibudidayakan dengan penggunaan miko-seedcookies. Penelitian ini menggunakan rancangan acak kelompok (RAK) dengan lima kelompok yang meliputi K1, K2, K3, K4, K5 dan empat perlakuan diameter miko-seedcookies yang meliputi P0 (kontrol), P1 (4 cm), P2 (5 cm), dan P3 (6 cm). Penelitian ini menggunakan 120 stek sambung nyawa dengan diameter rata-rata 1,30 ± 0,13 cm dan panjang tanam 19,07 cm. Parameter yang diukur adalah persentase bertunas stek, tinggi tanaman, jumlah daun, luas daun, berat segar, berat kering, dan kolonisasi mikoriza. Hasil penelitian menunjukkan bahwa penggunaan miko-seedcookies meningkatkan tinggi tanaman; jumlah daun; berat segar pucuk, daun dewasa, batang edible; berat kering daun dewasa, batang edible; dan kolonisasi mikoriza sambung nyawa. Penggunaan miko-seedcookies tidak memberikan pengaruh pada persentase bertunas stek, berat kering pucuk, dan luas daun. Penggunaan miko-seedcookies berdiameter 6 cm mampu meningkatkan pertumbuhan, produksi, dan kolonisasi mikoriza sambung nyawa., This research was conducted to evaluate the growth and production of Gynura procumbens with the miko-seedcookies addition usage. This research was use a randomized block design (RBD) with five blocks which included K1, K2, K3, K4, K5, and four treatments of miko-seedcookies diameter which included P0 (control), P1 (4 cm), P2 (5 cm), and P3 (6 cm). The research used 120 Gynura procumbens stem cuttings with an average diameter of 1.30 ± 0.13 cm and a planting length of 19.07 cm. Parameters measured were the percentage of germinating cuttings, plant height, number of leaves, leaf area, fresh weight, dry weight, and mycorrhizal colonization. The results showed that the mico-seedcookies usage increased plant height; number of leaves; fresh weight of shoot, mature leaves, edible stems; dry weight of mature leaves, edible stems; and mycorrhizae colonization. The miko-seedcookies has no effect on the percentage germinating cuttings, shoot dry weight, and leaf area. The use 6 diameter of miko-seedcookies could enhance the growth, production, and mycorrhizae colonization continuously.
Keyword: cultivation, cuttings, Gynura procumbens, miko-seedcookies

Judul: Miko-seedcookies® Effectivity on Improving the Growth and Production of Sorghum Samurai 2 (Sorghum Bicolor L. Moench) in the Post Mining Land of Limestone
Abstrak: MOHAMMAD DISAM ALFAIN. Efektivitas Miko-seedcookies® dalam Meningkatkan Pertumbuhan dan Produksi Sorgum Samurai 2 (Sorghum bicolor L. Moench) di Lahan Pascatambang Kapur. Dibimbing oleh PANCA DEWI MANU HARA KARTI dan IWAN PRIHANTORO. Tujuan penelitian adalah untuk mengevaluasi efektivitas Miko-seedcookies® dalam meningkatkan pertumbuhan dan produksi Sorghum Samurai 2 (Sorghum bicolor L. Moench) di lahan pascatambang kapur. Penelitian menggunakan rancangan acak kelompok (RAK) yang terdiri dari empat perlakuan berdasarkan dosis Miko-seedcookies® dan tiga kelompok. Data dianalisis menggunakan analisis ragam (ANOVA), jika ditemukan perbedaan yang signifikan (P<0,05), dilakukan uji lanjut Duncan. Parameter yang diamati meliputi kolonisasi fungi mikoriza arbuskula, daya tumbuh, jumlah daun, tinggi tanaman, diameter batang, umur berbunga, produksi biomassa segar dan kering, rasio batang dan daun, dan brix. Hasil penelitian menunjukkan bahwa peningkatan dosis Miko-seedcookies® sangat efektif untuk meningkatkan pertumbuhan dan produksi Sorgum Samurai 2 di lahan pascatambang kapur. Dosis Miko-seedcookies® 53 gram per titik tanam adalah yang terbaik. Kata kunci: fungi mikoriza arbuskula, Miko-seedcookies®, pertumbuhan, produksi, sorgum, MOHAMMAD DISAM ALFAIN. Miko-seedcookies® Effectivity on Improving the Growth and Production of Sorghum Samurai 2 (Sorghum Bicolor L. Moench) in the Post Mining Land of Limestone. Supervised by PANCA DEWI MANU HARA KARTI and IWAN PRIHANTORO. The objective this research was to evaluate Miko-seedcookies® effectivity on improving the growth and production of Sorghum Samurai 2 (Sorghum bicolor L. Moench) in the post mining land of limestone. The study used a randomized block design (RBD) consisting of four treatments based on Miko-seedcookies® dosage and three blocks. The data were analyzed using analysis of variance (ANOVA), if significant differences were found (P<0.05), Duncan's post hoc test was conducted. The parameters observed were arbuscular mycorrhizal fungi colonization, germination rate, leaf number, plant height, stem diameter, flowering age, fresh and dry biomass production, stem and leaf ratio, and brix. The results showed that enhancement the dose of Miko-seedcookies® is very effective in increasing the growth and production of Sorghum Samurai 2 in the post mining land of limestone. Miko-seedcookies® dosage of 53 grams per planting point is the best. Keywords: arbuscular mycorrhizal fungi, growth, Miko-seedcookies®, production, sorghum
Keyword: arbuscular mycorrhizal fungi, growth, Miko-seedcookies®, production, sorghum

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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