Judul: The effect of filler material of packaging to mechanical damages of yellow passion fruit (Passiflora flavicarpa) during transportation
Abstrak: The purpose of this study were to examine the amount of mechanical damage of yellow passion fruit in each package after transportation simulation, to study the effect of filler materials to the damage of those yellow passion fruit during transportation, and to determine the best among used filler materials for yellow passion fruit transportation. There were five packages used in this study which consist of four packages for treatment and one package for control. The four treatment packages were package with: shredded paper filler, wrapping paper filler, rice straw filler, and dried banana leaves filler. All of the packaged were simulated on the road (frequency 3.38 Hz, amplitude 4.04 cm for vertical vibration, during 154 minutes). It can be concluded that the yellow passion fruit packaged by wrapping paper filler only has a lowest mechanical damage, so this package method should be a good filler material of package for the distribution transportation of yellow passion fruit in carton.
Keyword: yellow passion fruit, packaging fillers, packaging, mechanical damage

Judul: Pengaruh Perlakuan Bahan Pengisi Kemasan terhadap Mutu Fisik Buah Pepaya Varietas IPB 9 (Callina) Selama Transportasi
Abstrak: Packaging is the most important method to keep horticultural comodity still maintained in the best quality. Filler material that will be used to package the horticultural comodity. Papaya is one of the horticultural comodity that has a great potential to be developed commercially. The objectives of this research was to asses the endurance of physical quality parameters of its fruits, such as mechanical damage on papaya, hardness, total solid soluble and weight losses. The first treatment is used sliced filler paper, sliced and sheet of spons, partition of cardboard for the filler material in the pack and control pack without filler. The second treatment is arranged the papaya position in packaging by using two different methods, such as horizontal and vertikal methods. The result has sown the papaya which arranged horizontal and packaged with the sliced filler paper is the suitable treatment for packaging. After transportation simulation, the treatment showed 16.67 % of mechanical damaged, 3.6 Kgf of hardness, 0.02 % of weight loss and 7.42 0Brix of total solid soluble. At the 8th days, showed 75 % of mechanical damaged, 0.405 Kgf of hardness, 10.26 % of weight loss and 8.39 0Brix of total solid soluble. The papaya which arranged horizontal and packaged with the sliced filler paper can reduce the vibration better than other.
Keyword: 

Judul: Invers dari Matriks Tridiagonal Jacobi
Abstrak: Suatu matriks berukuran n×n dinamakan matriks tridiagonal jika untuk . Karya ilmiah ini memberikan algoritma yang mudah untuk menemukan invers ( dari matriks tridiagonal Jacobi yang simetrik dan nonsimetrik. Setiap elemen pada matriks tridiagonal ini adalah bilangan real. Terdapat 3 lema dan 2 teorema untuk menentukan . Lema pertama menunjukkan persamaan utama dalam membuktikan lema-lema dan teorema-teorema selanjutnya. Invers dari matriks yang simetrik dibuktikan oleh lema kedua yang menunjukkan elemen-elemen baris ke- dari . Selanjutnya, lema kedua dilengkapi dengan teorema pertama yang menunjukkan elemen-elemen dengan . Invers dari matriks yang nonsimetrik dibuktikan oleh lema ketiga yang menunjukkan elemen-elemen dengan dan elemen-elemen dengan dibuktikankan oleh teorema kedua.
Keyword: symmetric, nonsymmetric, matrix