Judul: Analisis Keputusan Konsumen serta Implikasi terhadap Bauran Pemasaran Restoran DBC & Spageti, Kota Bogor
Abstrak: DBC & Spageti restaurant is a restaurant that serves a variety of menubased chocolate and spaghetti. The purpose of this research is to analyze the purchase decision prosess of consumers, the factors which can influence consumer purchasing decisions, the importance satisfaction level for performance attributes that will provide an alternative strategy attributes repairment in DBC & Spageti restaurant. The method of research is a descriptive analysis method, Customer Satisfaction Index (CSI), and Importance Performance Analysis (IPA).In the purchasing decision (nature of the visit depends on the situation, frequency of purchase only once a month, the visit does not necessarily, time to visit at afternoon, and the costs which is spend for eating from 50 000 until 100 000), and post-purchase decision are consumers satisfied and consumers have an interest to come back again. The results are the consumer satisfaction rate at DBC & Spageti restaurant is satisfied and can be seen from Costumer Satisfaction Index which is at 77.07 percent that will mean the consumers are satisfied.
Keyword: satisfaction, purchase decision prosess, DBC & Spageti restaurant, Bogor Agricultural University (IPB)

Judul: Analisis keputusan pembelian konsumen di RM. Bumi Aki Kota Bogor
Abstrak: Bogor is a well known city for culinary recreation in JABODETABEK. The emerging of Bumi Aki restaurant in Bogor has made the competition in culinary sector more competitive. The purpose of this research was to analyze the process of purchasing decision and consumer satisfaction of Bumi Aki restaurant. The purchasing decision process was analyzed in a descriptive way, and the consumer satisfaction level was analyzed using Importance Performance Analysis (IPA) and Customer Satisfaction Index (CSI). Based on IPA, there were three attributes located in quadrant I wich they performance were the main priority to be fixed, they were foods and beverages prices, order service speed, and responsiveness of complain handling. Attributes that located in quadrant II, wich they performance were need to be maintained, were foods and beverages taste, restaurant location, restaurant cleanliness, parking lot capacity, restaurant comfortness, and waitress hospitality and politeness. The result of CSI showed that consumers of Bumi Aki restaurant were satisfied.
Keyword: CSI, IPA, satisfaction, purchasing decision, Bogor Agricultural University (IPB)

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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