Judul: Jumlah Konsumsi Pakan Udang Galah Macrobrachium rosenbergii yang Diberi Pakan dengan Jenis Atraktan Berbeda.
Abstrak: The addition of attractants is expected to give positive correlations to the amount of feed taken and the growth of the shrimp. The purpose of this study was to determine the best attractant of three different sources squid meal, small shrimp meal and shrimp paste in order to stimulate the appetite of the shrimps. The experiments were performed using 8 units of aquariums sized 100x50x35 cm3 with stocking density of 10 shrimps/aquarium. Design used in this study was completely randomized design with three treatments of attractants addition on commercial feed in duplicaty. As much as 2% of squid meal, 2% of small shrimp meal, and 2% of shrimp paste was added to the commercial feed of each treatment using re-pelleting method while commercial feed without addition of attractants was used as the control diet. Feed test was given using at satiation method. The results showed that the best treatment of this study was the addition of 2% of shrimp paste which showed total feed consumption of 56.11±1.54 gram which could be concluded that it could be used as attractant for giant freshwater prawn feed.
Keyword: Macrobrachium rosenbergii., total feed consumption, attractant

Judul: Penambahan Jenis Atraktan yang Berbeda terhadap Respons Konsumsi Pakan pada Lobster Air Tawar Cherax quadricarinatus
Abstrak: Freshwater crayfish Cherax quadricarinatus of species belonging to rely on smell in finding foot and eating slowly so that the necessary existence of feed attractants in order lobster faster in finding and consuming feed. The purpose of this study was to determine the best type of attractant to increase feed intake response of freshwater crayfish. Three kind of attractants tested in this study were small shrimp flour, squid flour, and shrimp paste at rate of 2%. The study was conducted for 40 days and the lobster was given experiment feed using at satiation method, with feeding frequency 2 times a day. The average size of lobsters used in this study was 1.11±0.005grams/ lobster reared in 12 units of aquariums sized 50x 40x 30 cm3, with water depth of 15 cm. The results showed that the best of three types of attractant used in this study was small shrimp flour at rate of 2% with feed intake response as much 21.36±0.34 gram
Keyword: palatability, feed intake, Cherax quadricarinatus, attractant

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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