Judul: Penerimaan, sifat fisik dan kandungan zat gizi kerupuk singkong (manihot esculenta L. Crantz.) dengan penambahan tempe
Abstrak: Tujuan umum penelitian ini adalah untuk mengetahui pengaruh penambahan tempe pada pembuatan kerupuk singkong terhadap kandungan zat gizi dan penerimaannya. Sedangkan tujuan khusus penelitian ini adalah (1) Menentukan perbandingan tempe dengan singkong segar dan tepung tempe dengan tepung singkong (2) Mempelajari tingkat kesukaan panelis terhadap kerupuk yang tambahkan tempe (3) Menganalisis sifat fisik dan zat gizi dari kerupuk yang tambahkan tempe. (4) Menganalisis pengaruh penambahan tempe terhadap tingkat kesukaan, sifat fisik dan zat gizi dari kerupuk yang ditambahkan tempe.
Keyword: cassava crackers, tempeh, cassava, manihot esculenta L. Crantz

Judul: Physicalization-Chemical Flour and Cassava-Based Noodles from Kalimantan and Bogor
Abstrak: Singkong (Manihot esculenta) merupakan salah satu tanaman yang banyak dibudidayakan di Indonesia, dan termasuk sumber karbohidrat terbesar selain beras. Singkong biasanya diolah dengan digoreng maupun direbus. Penelitian mengenai tepung singkong sudah banyak tetapi untuk singkong dari varietas Pacar dari Kalimantan masih sedikit, dan belum ada penelitian mi yang berasal dari tepung singkong ini. Penelitian ini bertujuan mengkaji karakteristik tepung singkong yang dihasilkan dari singkong varietas Pacar dari Kalimantan dan singkong varietas Manggu dari Bogor, serta mendapatkan karakteristik fisiko-kimia mi berbahan dasar tepung singkong yang didapatkan dari proses penelitian sebelumnya. Penelitian ini dilakukan dengan dua tahapan yaitu proses pembuatan tepung singkong dengan metode pengeringan yang berbeda dan tahapan proses pembuatan mi singkong dengan metode kalendering. Metode analisis yang dilakukan antara lain analisis proksimat, analisis serat, analisis fisik (derajat keputihan, bentuk granula pati, cooking loss, texture profile, dan gelatinisasi pati). Berdasarkan hasil analisis fisik, tepung dengan perlakuan terbaik adalah tepung singkong varietas Pacar dari Kalimantan dengan perlakuan sinar matahari, dan tepung singkong varietas Manggu dari Bogor dengan perlakuan oven. Berdasarkan hasil analisis fisiko-kimia, formulasi terbaik mi singkong diperoleh dengan penggunaan 100% tepung singkong varietas Pacar dengan penambahan glukomanan sebesar 8% dan xanthan gum sebesar 4%., Cassava is one of the most cultivated plants in Indonesia, which is one of the largest sources of carbohydrates besides rice. Cassava is usually processed by frying or boiling. Research on cassava flour has been a lot but for cassava from the Pacar variety from Kalimantan is still a little in Indonesia, as well as research on noodles derived from its cassava flour. This study aims to examine the characteristics of cassava flour produced from cassava variety from Kalimantan and cassava variety Manggu from Bogor, as well as to get the physical-chemical characteristics of cassava noodle made from cassava flour obtained from the previous research process both cassava. This research was conducted with two stages, namely the process of making cassava flour with different drying methods and the stages of the cassava noodle making process with the calendaring method. The analytical methods carried out include proximal analysis, fiber analysis, physical analysis (degree of vaginal discharge, granule shape of starch, cooking loss, texture profile, and gelatinization of starch). Based on the results of physical analysis, the flour with the best treatment is cassava flour from Kalimantan with sunlight treatment, and Cassava flour manggu variety from Bogor with oven treatment. Based on the results of physical-chemical analysis, the best formulation of cassava noodles is obtained with the use of 100% cassava flour of the Pacar variety with the addition of glucomannan by 8% and xanthan gum by 4%.
Keyword: Cassava Flour, Cassava Noodles, Drying, Gelatinization, Physical  Analysis

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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