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: Study on the effect of inner layer and filler materials to quality of tomato fruit (Lycopersicon esculentum Mill.) in wooden box package during transportation
Abstrak: The purpose of this study were to examine the amount of mechanical damage of tomatoes in each package after transportation simulation, the effect of inner layer and filler materials to the damage of those tomatoes during transportation, and determine to the best among used inner layer and filler materials for tomatoes transportation. The study was carried out on February to April 2011 in TPPHP Laboratory of IPB. 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 newspaper filler only, package with dried banana leaves filler only, package with inner layer and shredded newspaper filler, and package with inner layer and dried banana leaves filler. The material of inner layer was a paper that usually used for packing of cement. All of the packaged were simulated on the road in the Sub’urb condition (frequency 3.23 Hz, amplitude 4.75 cm for vertical vibration, during 80 minutes) so the path length (distance) equality was 106.16 km. The package with inner layer and dried banana leaves filler material have the highest mechanical damage there is 44.96%. Then followed by the package with dried banana leaves only, the package with inner layer and shredded newspaper filler material, and the package with shredded newspaper only, those are 32.97%, 27.53%, and 25.20% respectively. On the other hand, the package for control (no treatment) have the mechanical damage in amount of 53.79%. It can be concluded that the tomatoes packaged by shredded newspaper filler only has a lowest mechanical damage, so this package should be a good package for the distribution transportation of tomatoes in wooden box.
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