Judul: Respon Kualitas Pascapanen Bawang Merah (Allium ascalonicum L.) Terolah Minimal Pada Beberapa Suhu Penyimpanan.
Abstrak: Shallots are agricultural products that very important for Indonesian people. Nowdays, demand for ready to be processed vegetables and fruits are increased. Fresh and ready to be processed shallots are still not commonly found in the market. The purpose of this study was to analyze the quality change of the minimally processed shallots (Allium ascalonicum L.) stored at low temperature and determine the storaged time. The outer skin of the shallots were peeled and cleaned and then packed in styrofoam coated with food grade plastic films (plastic polymer). Shallots were stored at a temperature of 0 °C, 5 °C with RH 65-75 % and room temperature. The changes in quality parameters i.e water content, weight loss, thoughness, VRS levels and the percentage of damage were measured during storage period. The results showed that shallots stored at room temperature after two weeks storage due to moldy and rotten. The quality of shallots stored at temperature 0 °C showed better than quality of shallots at temperature 5 °C. Water content were fluctuated and tend to rise until the end of storaged time. Weight loss and damaged of shallots were increased until the end of storaged time. Firmness and VRS of shallots were decreased during storage.
Keyword: low temperature, minimal processed, shallots, storage

Judul: Pengaruh Suhu dan Kemasan Terhadap Mutu Bibit Bawang Merah (Allium ascalonicum L.)
Abstrak: In storing of shallot seedbulbs, the damage because porous, disease, rooting and sprouting are often occur. The objective of this study was to determine the optimum temperature and packaging in order to maintain the qualities of shallot seedbulbs during the storing time. In this study, the packaging used is plastic net and polyethylene, stored at 10°C, 15°C, and room temperature. Parameters measured were weight loss, moisture content, hardness, damage, and sprouting. Room temperature could withstand the increasing of weight lost from week 2 to week 8 and temperature treatment could not withstand the decreasing of moisture content and hardness during the storing time. Storing at room temperature could withstand sprouting and damage of seedbulbs during the storing time. Plastic net packaging could withstand the increasing of weight loss at week 1 and week 2. Packaging treatment could not withstand the decreasing moisture content and hardness during the storing time. Polyethylene packaging could reduce damage during the storing time. Plastic net and polyethylene packaging could reduce sprouting during the storing time. Storing at room temperature with polyethylene packaging could reduce damage by 11.97% and sprouting by 0.004% during the storing time
Keyword: quality., packaging, temperature, shallot seedbulbs

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