Judul: Kajian Pengaruh Tipe Ventilasi dan Suhu Penyimpanan Terhadap Perubahan Mutu Buah Alpukat (Persea Americana,Mill) dan Sebaran Suhu Dalam Kemasan
Abstrak: Post harvest handling of avocado in Indonesia usually are still done with less carefull during harvesting, packaging, transportation, and storage can lead to mechanical, physiological, chemical, and microbiological damage. Mechanical damage during the distribution process of fruits due to impact between fruit inside the packaging, the impact of the fruit with a wall packaging, as well as the excess pressure due to pile in one package. The use of corrugated box packaging by giving insulation between the fruit and ventilation holes are expected to reduce mechanical damage and changes in avocado fruit quality such as shrinkage weight, hardness, total soluble solids, and physical damage during storage. This research was done to investigate four packaging types : packaging without ventilation, circle type ventilation packaging, oblong type, insulation type; and two treatment of storage temperature of room temperature and 8 0C temperature. The testing result in the temperature distribution on the packaging indicates that the packaging with oblong ventilation type most quickly reach the expected storage temperature. The transport simulation results of the which was equivalent with 184.82 miles in the road out of town or approximately 3:08 hours for trucks with speed of 60 km / h shows the level of fruits mechanical damage in 0% on all packaging. Although the package with oblong ventilation is better in distribution temperature, but overall, the decreasing quality of avocado in circle ventilation package is slower than the other packages. Due to, the best package to be distributed the avocado is package with circle ventilation in temperature of 8 oC.
Keyword: 

Judul: Mempelajari pengaruh "Modified Atmosphere Packaging" terhadap masa simpan alpukat (Persea americana, Mill)
Abstrak: Tujuan dari penelitian ini adalah untuk mempelajari pengaruh penyimpanan modifikasi atmosfer terhadap buah al- pukat, dengan menggunakan kemasan plastik fleksibel, serta pendugaan komposisi gas 02 dan CO2 selama penyimpanan. Bahan utama yang dipakai dalam penelitian ini adalah alpukat (Persea americana, Mill) yang terdiri dari tiga varietas yaitu Fuerte (lokal: Kodok), West Indian dan Guatemala. Varietas Fuerte (lokal: Kodok) diperoleh dari Ciku- rai, Bogor; varietas West Indian diperoleh dari Padjajar- an, Bogor dan varietas Guatemala diperoleh dari Garut...
Keyword: 

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
Keyword: