Judul: Perilaku Konsumen dalam Aktivitas Pembelian Telur Omega-3 di Beberapa Supermarket di Kota Bogor
Abstrak: Omega-3 egg is egg that contains more omega-3 than conventional egg but still not too popular in society. The aim of this study was to identify consumer behavior towards purchasing activity omega-3 egg in several categories supermarket in Bogor City. This study conducted in 26 August – 26 September 2013 in 6 supermarkets namely Ramayana Tanah Sareal, Lotte Mart Cimanggu, Yogya Cimanggu, Giant Yasmin, Giant Botani Square and Superindo Jembatan Merah. There were 60 selected samples were divided 10 samples supermarket-1. This study used non randomized sampling method. Consumer in Bogor city have known the information about omega-3 egg from print media, buy it from supermarket purpose to consumed, all family member consume but not rutine, amount of eggs 10 eggs purchase-1, brown egg shell is preferred, the most preferred packaging was plastic mica, egg price 2.500 rupiah egg-1 and respondents thought that omega-3 egg price expensive.
Keyword: Bogor Agricultural University (IPB), respondents., popular, omega-3 egg, consumer, behavior

Judul: Perception and Consumer Behavior of Beef Nuggets Products of Adult Consumers in Kota Bogor
Abstrak: Naget yang ada di pasaran biasanya berupa naget ayam, sapi, dan ikan. Di pasaran, naget sapi belum banyak dikenal masyarakat. Penelitian ini bertujuan menganalisa persepsi, perilaku konsumen, dan hubungan persepsi dan perilaku konsumen masyarakat dewasa di Kota Bogor terhadap produk naget daging sapi. Sampel diambil sebanyak 100 responden dewasa di Kota Bogor dengan teknik disproportionate stratified random sampling. Tahap dalam penelitian adalah menggunakan rumus Slovin untuk menentukan jumlah sampel dari populasi, menentukan jenis dan pengumpulan data, kemudian pengolahan data menggunakan uji Chi-Square dan Rank Spearman. Hasil penelitian didapatkan bahwa terdapat hubungan antara persepsi dan perilaku konsumen yang signifikan antara persepsi kemasan dan cara penyajian. Ukuran kemasan yang paling banyak dipilih adalah 250 g dengan frekuensi membeli yaitu satu bulan sekali. Terdapat hubungan korelasi antara karakteristik (pendapatan, pekerjaan, dan pendidikan) dengan perilaku konsumsi (frekuensi, harga, dan ukuran yang dipilih untuk membeli naget sapi). Sebanyak 64% responden yang belum pernah mencoba naget sapi tertarik untuk mencoba naget sapi., Nuggets at the market are usually chicken, beef, and fish nuggets. In the market, beef nuggets are not widely known to the public. This study aimed to analyze perceptions, consumer behavior, and the relationship between perceptions and consumer behavior of adults in the city of Bogor towards beef nuggets. Samples were taken from as many as 100 adult respondents in the city of Bogor with a disproportionate stratified random sampling technique. The stage in the research was to use the Slovin formula to determine the number of samples from the population, determine the type and collection of data, then process the data using the Chi-Square and Rank Spearman tests. The results showed that there was a significant relationship between consumer perception and behavior perceived quality and consumption frequency. The most widely chosen packaging size is 250 gs with a frequency of buying once a month. There was a correlation between characteristics (income, occupation, and education) with consumption behavior (frequency, price, and price chosen to buy beef nuggets). As many as 64% of respondents who had never tried beef nuggets chose to be interested in trying beef nuggets.
Keyword: adult, beef nugget, consumer’s behavior, perception

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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