Judul: Analisis Tingkat Partisipasi Anggota Koperasi Peternak Sapi Bandung Utara (KPSBU) Jabar
Abstrak: The role of cooperatives in economic development can be realized by exsisting their member active participations in every cooperative business activity which are benefit for improving welfare in the form of social and economic benefits. This study aims to analyze the level of member participation in the activities of North Bandung Cattle Breeder Cooperative (KPSBU) West Java. The method of analysis used was the Spearman Rank analysis which determined the relationship between the cooperative’s socio-economic benefits and its member participation level. The results showed that the relationship between social-economic benefits and member participation level in the fields of organization, business and capital had a strong relationship or moderately high association. The strongest relationship which was seen between the social-economic benefits and the member participation level was the relationship in a field of organization, especially the members’attendant in annual member meeting (RAT). The perceived social benefits are the relations of good cooperation between executive board members in terms of service and the fulfillment of the requirements for breeders. While the economic benefits perceived is the guarantee marketing milk and additional income after being a member (KPSBU) West Java.
Keyword: Participation, Socio-economic benefits, Cooperative

Judul: Persepsi peternak sapi perah anggota koperasi terhadap peranan dan fungsi koperasi : studi kasus koperasi peternak sapi Bandung Utara (KPSBU) Kecamatan Lembang Kabupaten Bandung
Abstrak: Penelitian ini bertujuan untuk : (1) mengetahui persepsi peternak sapi perah anggota koperasi terhadap peranan dan fungsi koperasi, (2) mengetahui karakteristik peternak sapi perah anggota koperasi, dan (3) mengetahui tingkat hubungan antara karakteristik peternak sapi perah anggota koperasi dengan persepsi mereka terhadap peranan dan fungsi koperasi. Penelitian ini dirancang sebagai studi kasus dan didesain dalam bentuk deskripsi korelasional. Dalam hubungannya dengan penelitian ini, karakteristik peternak yang diteliti meliputi (1) jenis kelamin, (2) umur, (3) pendidikan formal, (4) pekerjaan pokok, (5) lama menjadi anggota koperasi, (6) skala pemilikan sapi perah, (7) pengalaman beternak, (8) tingkat partisipasi, dan (9) motivasi menjadi anggota koperasi. Persepsi peternak terhadap peranan dan fungsi koperasi diukur dengan lima indikator, yaitu : (1) penyediaan input produksi, (2) penyediaan modal dan kredit, (3) pembinaan kepada peternak anggota, (4) pelayanan dalam pemasaran, dan (5) penyediaan kebutuhan anggota.
Keyword: sapi perah

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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