Judul: The Influence of Soybean Curd Sludge Addition, Calcium Addition and  Temperature  Treatment  on  the  Growth  and  the  Development  of  the  Lumbricus  rubellus  worm  and  the  Quality  of Vermicompost  by  using  the Media  of Manure.
Abstrak: Earthworm, gives to human beings, a lot of utilities and benefits. Nowadays, people start to develop and to multiply it by using the technique of Vermiculture. The growth and the development of earthworm is, among other things, influenced by the availability of organic matter, acidity, humidity and temperature. Every kind of earthworm needs different sorts of condition for its growth and its development. Yet, all this time, the vermiculture process executed, is still using a mixture of several kinds of earthworms, which doesn't result an optimum growth and development of worms. Purifying the different kinds of earthworms is needed in order to create an optimum condition for the earthworm's growth and development and also, for the vermicompost result, itself. The aim of the research is to fmd out the influence of soybean curd sludge addition, calcium addition and temperature treatment on the growth and the development of the Lumbricus rubellus worm by using the media of manure.
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Judul: The  Effect  of  lime,  Gliricidia  maculata  (H.  B.  K)  Leaves  and Soybean  curd  sludge  (SCS)  Addition  on  The Quality  of  Vermicompost Medium  Chicken  Manure Mixed with  Rice  Straw.
Abstrak: Application of agricultural intensification on the lack of land due to increasing human population could decreased organic matter so that land productivity also decreased. The decreasing of organic matter can be pusshed by adding organic matter into the soil using any kind of waste product, such as plants, manure etc. as organic amelioration which produced by composting. With the development of biotechnology. now composting technic can be improved by vermicomposting namely; composting organic matter technic by the help of earthworm. One of orgnic matter that can be use in vemicomposting is chicken manure. Fresh chicken manure contain significant amounts of inorganic salt and ammonia which may kill earthworm, but after removal of these materials or mixed it with another organic matter, earthworm can grow well and produce compost with high nutrient. The purpose of this research is to learn about the effect additional of lime. laves of Gliricidia maculata (H.B.K) and soybean curd sludge (SCS) on the quality of vermicompost with medium chicken manure mixed with rice straw. This research was conducted in Soil Physics and Conservation Laboratory. Soil Science Departement, Faculty of Agriculture, Bogor Agriculture University. from Allgust to December 2000. Analysis of chemical, physical and biological vermicompost were conducted in Chemical and Soil Fertility Laboratory. Soil Physics and Conservation Laboratory, and Soil Biology Laboratory. Soil Science DepartemenL Faculty of Agriculture, Bogor Agriculture University. This research used completely randomize designed experiment with 10 treatments. namely AOPO (without lime + without leaves of Gliricidia maculala (H.B.K) and soybean curd sludge (SCS», AOPI {without lime + 5% of soybean curd sludge (SCS»). AOP2 (without lime + 10% of soybean curd sludge (SCS)). AOP3 (without lime + 5% of Gliricidia sp. leaves). AOP4 (without lime + 10% of Gliricidia sp. leaves). AIPO (l % of lime + without leaves of Gliricidia maculala (H.B.K) and soybean curd sludge (SCS», Al PI (l % of lime + 5% of soybean curd sludge (SCS». AIP2 (1% of lime + 10% of soybean curd sludge (SCS», AIP3 (1% of lime + 5% of Gliricidia sp. leaves) and Al P4 (1 % of lime + 10% of Gliricidia sp. leaves). with 3 repetition of each treatment, so there were 30 sets of experiment.
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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