Judul: Sistem monitoring thesis progress mahasiswa pascasarjana Institut Pertanian Bogor
Abstrak: Thesis progress merupakan serangkaian kegiatan yang harus dilalui untuk memperoleh gelar Magister pada Sekolah Pascasarjana Institut Pertanian Bogor (SPs-IPB). Kegiatan thesis progress dimulai dari sidang komisi I, kolokium, sidang komisi II, seminar, sidang komisi III, sidang tesis, dan SKL. Proses monitoring masih kurang efektif karena tidak dapat diakses oleh dosen dan mahasiswa. Penelitian ini bertujuan membangun sistem berbasis web untuk monitoring thesis progress dan indeks prestasi mahasiswa. Sistem dibangun dengan metode web engineering menggunakan framework CodeIgniter. Monitoring tesis terdiri atas monitoring progress per angkatan, rekapitulasi progress per program studi, progress per dosen pembimbing, dan rata-rata lama studi lima angkatan terakhir. Monitoring nilai dibagi menjadi monitoring nilai per mata kuliah, kelanjutan studi, rekap indeks prestasi kumulatif (IPK) empat angkatan terakhir, dan rata-rata IPK lima angkatan terakhir. Pembangunan sistem pada penelitian ini diharapkan dapat mempermudah pihak manajerial dalam melakukan proses monitoring untuk meningkatkan kualitas pendidikan.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, GPA, Monitoring system, Postgraduate, Thesis, Web engineering

Judul: Sistem Monitoring Thesis Progress Mahasiswa Pascasarjana Institut Pertanian Bogor
Abstrak: Thesis progress is a series of activities that must be passed to obtain a Master's degree at the postgraduate school of Bogor Agricultural University (SPs-IPB). The activities started from the first commission meeting, colloquium, second commission meeting, seminar, third commission meeting, thesis, and graduation certificate. Monitoring process is currently not very effective because it can not be accessed by lecturers and students. This research aims to build a web-based system for monitoring thesis progress and student's grade point. The system is built with web engineering method using CodeIgniter framework. Thesis monitoring consists of monitoring progress per class, progress recapitulation per course of study, thesis progress per supervisor, and the average length of study from the last five classes. Grade monitoring are divided into grades per subject, the continuation of study, GPA recaps from the last four classes, and the GPA average from the last five classes. The system development in this research is expected to facilitate the users in the process of monitoring to improve the quality of education.
Keyword: GPA, monitoring system, postgraduate, thesis, web engineering

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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