Judul: Analisis Keputusan Pembelian Daging Sapi oleh Konsumen Rumah Tangga (Kasus: Hipermarket Giant Taman Yasmin Bogor)
Abstrak: The beef price rising affected other meat products purchasing, such as chicken and fish. The increasing of beef price also happened at the modern market in Bogor. This study analyses the process of beef purchasing by consumer, interest level and performance attributes of beef at Giant Taman Yasmin. By using Costumer Satisfaction Index (CSI) and Importance Performance Analysis (IPA) methods, the results are the consumer satisfaction rate of beef sales at Giant Taman Yasmin is satisfied, where consumers have felt the performance of beef in Giant Taman Yasmin has good, but there is still need to be improved, and the price attribute is the first priority which has to be improve
Keyword: satisfaction, process of purchasing, Giant Taman Yasmin

Judul: Sikap Konsumen terhadap Pembelian Daging Sapi di Pasar Tradisional Kabupaten Bogor
Abstrak: Konsumsi daging sapi di Kabupaten Bogor mengalami peningkatan setiap tahunnya. Pasar tradisional menjadi pilihan pertama konsumen dalam memeroleh daging sapi karena harga yang murah dan dekat dengan tempat tinggal. Namun, peningkatan ini diiringi oleh pertumbuhan jumlah pasar tradisional yang rendah. Disisi lain, kondisi tersebut tidak mengurangi minat konsumen untuk membeli daging sapi di pasar tradisional. Tujuan penelitian ini adalah menganalisis proses pengambilan keputusan konsumen dan sikap konsumen terhadap atribut daging sapi di pasar tradisional Kabupaten Bogor. Hasil penelitian menemukan bahwa proses keputusan pembelian daging sapi dimulai dari pengenalan kebutuhan, pencarian informasi, evaluasi alternatif, pembelian, dan yang terakhir perilaku pasca pembelian. Sikap konsumen terhadap kesembilan atribut daging sapi yang diteliti adalah positif dengan urutan atribut yang dipertimbangkan saat membeli daging sapi di pasar tradisional dimulai dari harga, warna, aroma, kandungan lemak, tekstur, bentuk promosi, warna lemak, golongan potongan, dan yang terakhir adalah atribut kandungan air., Beef consumption in Bogor Regency increases every year. Traditional markets are the first choice of consumers for obtaining beef due to their low prices and proximity. However, the number of traditional markets is experiencing low growth despite this increase. On the other hand, this condition does not reduce consumer interest in buying beef in traditional markets. The purpose of this study was to analyze the consumer decision-making process and consumer attitudes towards beef attributes in traditional markets in Bogor Regency. The results found that the beef purchase decision process starts with need recognition, information search, alternative evaluation, purchase, and finally post-purchase behavior. Consumer attitudes towards the nine beef attributes studied are positive, with the order of attributes considered when buying beef in traditional markets starting from price, color, aroma, fat content, texture, promotional form, fat color, cut class, and the last being the water content attribute.
Keyword: Beef, consumer attitude, fishbein

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.
Keyword: