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Journal of Mathematical and Fundamental Sciences
Published by Institut Teknologi Bandung
ISSN : 23375760     EISSN : 23385510     DOI : https://doi.org/10.5614/j.math.fund.sci.
Core Subject : Science, Education,
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics
Journal of Mathematical and Fundamental Sciences welcomes full research articles in the area of Mathematics and Natural Sciences from the following subject areas: Astronomy, Chemistry, Earth Sciences (Geodesy, Geology, Geophysics, Oceanography, Meteorology), Life Sciences (Agriculture, Biochemistry, Biology, Health, Medical, Pharmacy), Mathematics, Physics, and Statistics.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 3 Documents
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Search results for , issue "Vol. 12 No. 2 (1979)" : 3 Documents clear
Pemetaan Nilpoten Achmad Arifin
Journal of Mathematical and Fundamental Sciences Vol. 12 No. 2 (1979)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Sari. Dibuktikan teorema mengenai dekomposisi pada ruang vector yang diakibatkan oleh suatu pementaan nilpotent. Dekomposisi ini, disamping ditentukan oleh indeks nilpoten, juga ditentukan oleh nolitas pemetaan. Abstract. The theorm on the decomposition of a vector space caused by a nilpotent map is proved. The decomposition is determined besides by the index of nilpotency, also by the nullity of the map.
Metal Fabricating Process by Powder Metallurgy D.N. Adnyana
Journal of Mathematical and Fundamental Sciences Vol. 12 No. 2 (1979)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. The aim of this introductory paper is to consider some of the important principles that are commonly involved in the field of powder metallurgy. These principles cover a general description of the interrelations of the various effects in the powder metallurgy such as characterization of powders, compaction and sintering. Their influences on all process routes are described and their pertinent relations to the experimental results are discussed. Sari. Maksud dari tulisan ini adalah untuk memberikan pengarahan dengan memperhatikan beberapa prinsip-prinsip dasar penting yang biasanya dikaitkan dengan bidang puder metallurgi(+). Prinsip-prinsip ini meliputin suatu uraian umum dari hubungan-hubungan untuk bermacam-macam pengaruh di dalam puder metallurgi, seperti: peranan dan sifat-sifat puder, proses-proses pengepresan dan penyinteran. Suatu uraian dan diskusi diberikan mengenai pengaruh-pengaruh itu terhadap semua jalnnya proses dan kemudian dihubungkan dengan hasil-hasil eksperimen yang diperoleh.
Pengaruh Lima Jenis Jamur Penicillium terhadap Daya Kecambah Gabah U. Suriawiria; Hilda Zulkifli
Journal of Mathematical and Fundamental Sciences Vol. 12 No. 2 (1979)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Sari. Kadar air merupakan salah satu factor yang dapat menyokong pertumbuhan dan perkembangan jamur pada biji-bijian yang disimpan selain temperature dan kelembababn relatif dari tempat penyimpanan. Akibat pertumbuhan dan perkembangan jamur pada biji-bijian dapat menyebabkan penurunan daya kecambah biji. Penelitian ini melaporkan hasil pengamatan jamur Penicillium chrysogenum, P. islandicum, P. citrinum, P. decumbens dan P. notatum yang berasal/tumbuh pada beras dan gabah tersimpan. Dari hasil analisa statistika selama 3 bulan didapatkan bahwa tidak ada pengaruh pertumbuhan jamur secara nyata terhadap daya kecambah gabah pada kadar air dibawah 14.0%. Abstract. Next to the temperature and relative humidity of the storage house, the moisture content of the grains will influence growth and development of contaminating molds on the stored grains. Growth and development of these molds may result in decrease of seed germination. This paper reports the observed influence of Penicillium chrysogenum, P. islandicum, P. citrinum, P. decumbens and P. notatum growing on stored rice and paddy. Statistical analysis made during 3 months observations showed that at a moisture content of below 14.0%, no obvious influence of mold growth towards seed germination occurred.

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