Judul: Increased Yield of Torbangun Plant (Coleus amboinicus Lour.) by Giving Auxins and Various Bioactivators Treatment
Abstrak: Perbanyakan torbangun (Coleus ambinicus Lour.) dilakukan dengan menggunakan stek batang. Penelitian ini bertujuan untuk mempelajari peranan auksin dan bioaktivator sebagai mikroorganisme positif yang mampu meningkatkan produksi tanaman. Penelitian dilaksanakan di Cipanas, Kabupaten Cianjur, Jawa Barat. Percobaan dilaksanakan menggunakan rancangan kelompok lengkap teracak (RKLT) dengan dua faktor. Faktor pertama penelitian ini mengunakan Auksin (IAA yang dilarutkan menggunakan NaOH) dengan dosis 100 ppm. Faktor kedua variasi bioaktivator menggunakan EM4, PGPR, Trichoderma sp., dan asam laktat dengan dosis 10 ml/L. Percobaan terdiri dari 30 satuan percobaan dengan 600 tanaman dan 180 tanaman sampel. Hasil sidik ragam beberapa parameter seperti bobot daun layak jual, bobot daun tidak layak jual, bobot batang dan bobot panen total pada panen 4 menunjukkan adanya pengaruh yang berbeda nyata dari percobaan menggunakan auksin.
Keyword: pemanenan, Perbanyakan torbangun, sidik ragam

Judul: Peningkatan Mutu Bibit Torbangun (Plecranthus amboinicus Spreng.) dengan Pemilihan Asal dan Pemberian Auksin
Abstrak: Torbangun is an indigenous vegetable that its leaves used as herbal plant. Torbangun propagation still done vegetatively by cutting, but it has not been developed. The purpose of this research is to get the best combination part of stem cuttings and auxin concentration, in order to achieve vigor cutting. This research was conducted at Conservation and Biopharmaca Cultivation, Cikabayan IPB, Bogor from January until March 2014. This research consisted of 2 experiments. The first experiment treatments were part of stem cuttings torbangun (tips, central and base) and auxin concentrations (0, 20 and 40 ppm). Second experiment treatments were length of tips cuttings torbangun (3.5, 7, and 10.5 cm) and auxin concentration (0, 20, dan 40 ppm). Because of limited seed, tips cuttings at first experiment was same with tips cuttings with 7 cm length at second experimment. There were 15 combination of treatments, 3 replications and each treatment consisted of 10 cuttings, in this way a total was 450 cuttings. The experiments was laid out in Randomized Completely Block Design – Factorial with two factor. The result of this experiments showed that tips was the best part of stem cuttings to achieve vigor cutting torbangun. All concentrated of auxin until 40 ppm did not affect to cutting’s indicator. 10.5 cm of length tips cuttings was the best to increase long roots and nodes of torbangun
Keyword: seed quality, Plectranthus amboinicus, indigenous, cutting methods

Judul: Kekonsistenan Hamiltonian pada Gerak Gelombang Interfacial
Abstrak: The interfacial wave is an internal wave that occurs at boundary of two layers fluid. It appears because there is difference of mass density between the two layers. The objective of this thesis is to formulate the motion of internal wave with flat base and flat as well as free upper bound surface. The motion equation obtained is a Hamiltonian system. The Hamiltonian in this system is expressed by variable of wave deviation and horizontal component of potential velocity. Under assumption that interfacial wave moves only in one direction, it can be shown that the Hamiltonian depends on the solution of the wave motion equation. The coefficients of the equation depend on the physical characteristics of the two layers of fluid, i.e. thickness and mass density. The numerical results show that Hamiltonian in the system is constant. It is consistent with Hamiltonian characteristic, which does not depend on time.
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