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Journal of Mathematical and Fundamental Sciences
ISSN : 23375760     EISSN : 23385510     DOI : https://doi.org/10.5614/j.math.fund.sci.
Core Subject : Science, Education,
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.
Articles 3 Documents
Search results for , issue "Vol. 7 No. 4 (1974)" : 3 Documents clear
Poisson Bracket Relativistic Hans J. Wospakrik
Journal of Mathematical and Fundamental Sciences Vol. 7 No. 4 (1974)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. Classical Poisson Bracket is extended to the four dimensional space - time formalism in Special Relativity. This formulation gives the relativistic equation of motion appeared directly as its consequenced. Ringkasan. Dalam artikel ini dicoba memperluaskan notasi Poisson Bracket dalam Mekanika Klassik ke dalam ruang-waktu berdimensi empat dari Teori Relativistik Khusus. Formulasi ini, ternyata sangat menarik sekali karena memberikan persamaan-persamaan gerak relativistik muncul secara wajar sebagai konsekwensinya.
Vinti's Surface Density as a Means of Representing the Earth's Disturbance Potential Harijono Djojodihardjo
Journal of Mathematical and Fundamental Sciences Vol. 7 No. 4 (1974)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. Vinti's method of representing the potential of the earth in two parts, with the first part represented by spheroidal potential and the second part being the earth disturbance potential, is outlined. The earth's disturbance potential is then represented as a surface distribution σ of mass density of variable sign over a sphere S just clearing the earth. The feasibility of the method is evaluated by calculating the distribution of o from satellite determination of the harmonic coefficients. Ringkasan. Suatu metoda untuk menyatakan potensial bumi berdasarkan teori Vinti diuraikan. Menurut metoda ini, potensial bumi dinyatakan sebagai jumlah potensial utama, yang diperoleh sebagai potensial spheroid, dan potensial gangguan, yang dinyatakan sebagai distribusi kerapatan masa permukaan pada suatu bola yang tepat menyelubungi bumi. Kegunaan metoda ini diuji dengan menghitung distribusi σ dengan menggunakan koefisien-koefisien harmonik yang ditentukan dari analisa data satelit.
Reproduksi pada Suatu Jenis Chiroptera dari Daerah Tropis Tadarida plicatus plicatus (Horsfield) Sri Sudarwati; Lien A. Sutasurja
Journal of Mathematical and Fundamental Sciences Vol. 7 No. 4 (1974)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Ringkasan. Siklus reproduksi Tadarida plicatus plicatus (Horsfield) telah diselidiki selama dua tahun berturut-turut. Tenyata dalam setahun terdapat dua kali masa berkembang-biak, yakni pada bulan-bulan Maret-April serta September-Oktober. Type uterusnya bicornuatus dengan tanduk kiri yang tereduksi, karena itu implantasi embryo selalu berlangsung dalam tanduk uterus yang kanan. Abstract. The reproductive cycle of Tadarida plicatus plicatus (Horsfield) has been studied for two consecutive years. Results show a biannual breeding season, in March-April and September-October. The uterus is bicornuate with a reduced left horn, implantation of embryo therefore always occurs in the right horn. 

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