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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
 1 
Search results for , issue "Vol. 18 No. 1 (1985)" : 3 Documents clear
Spektrofotodensitometri untuk Menentukan Antidepresan Amin Trisiklik yang Beredar di Indonesia dalam Tablet dan dalam Urin Raslim Rasyid; Yeyet C. Sumirtapura; Tisno Suwarno; INK Widjaja; Anwar Anwar
Journal of Mathematical and Fundamental Sciences Vol. 18 No. 1 (1985)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Penentuan kadar antidepresan amin trisiklik yang beredar di Indonesia (amitriptilin, nortriptilin, dan imipramin) dengan cara spektrofotodensitometri dilakukan terhadap tablet dan urin. Isolasi dari tablet dilakukan dengan methanol dan dari urin dengan eter. Cara ini sudah dicoba untuk menentukan kadar senyawa amin trisiklik dalam tablet dan urin sukarelawan setelah pemberian senyawa-senyawa ini dalam dosis tunggal. A spectrophotodensitometric method has been carried out for the determination of tricylic amine antidepressants available in lndonesia (amitriptyline, nortriptyline and imipramine) in tablets and urine. Isolation was done by methanol from tablets and by ether from urine. The method has been applied for examinations of tricyclic amine compounds in tablets as well as in urine of volunteers receiving a single dose of the compounds. 
Vibration and Tooth Strain Measurement on a Pair Misaligned Power Transmission Helical Gears Komang Bagiasna; Kiyohiko Umezawa; Toshio Suzuki
Journal of Mathematical and Fundamental Sciences Vol. 18 No. 1 (1985)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Sari. Suatu penyelidikan dilakukan terhadap pasangan roda gigi miring yang memiliki spesifikasi sebagai berikut: totaI contact ratio lebih besar dari 2,0 dan overlap ratio lebih kecil dari 1,0. Dalam penyelidikan ini dibuat suatur set up percobaan untuk mengukur pengaruh kesalahan pemasangan poros roda gigi terhadap karakteristik getaran maupun regangan yang terjadi pada roga gigi miring tersebut. Besaran yang diukur mencakup percepatan akselerasi getaran, regangan pada akar gigi, dan dilakukan pula analisa frekuensi terhadap sinyal getaran tersebut. Data yang diperoleh menunjukkan bahwa tingkat kesalahan pemasangan yang tertentu memberikan pengaruh yang besar terhadap karakteristik getaran maupun pola regangan pada roda gigi miring tersebut. Kesalahan deviasi poros maupun inklinasi poros yang sama besar, yang terjadi pada sisi depan dan pada sisi belakangan roda gigi, ternyata menghasilkan karakteristik getaran maupun harga regangan yang berbeda. Abstract. A pair of helical gears with the following specifications: (1) the total contact ratio of more than 2.0, and (2) the overlap ratio of less than 1.0, has been investigated to determine the relationship of the gears shaft alignment errors with the vibration characteristic, and with the tooth strains as well. For this purpose an experimental set up has been made available to measure the acceleration level, tooth root strains, and to carry out frequency analysis of the gear vibration signals. It was found that at a certain level of gears shaft alignment errors the characteristic of gear vibration were strongly affected by errors. The results demonstrated that for the same amount of error, the gear shaft deviation and gear shaft inclination applied at different sides, i.e., at gear leading side and at gear trailing side, produced different gear vibration characteristics as well as tooth strain values.
Problems of Combining Absolute and Relative Points and Area Symbols, With Special Reference to Mapping Industrial Workers in North and West Sumatera, Indonesia T. Lukman Aziz
Journal of Mathematical and Fundamental Sciences Vol. 18 No. 1 (1985)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

Abstract. The most important phase of cartographic processes is the selection of map symbols for data presentations, since the effectiveness of maps as a medium of communication depends on this selection. A great variety of map symbols can be chosen. This study shows how to utilize symbols in solving a typical problem of a map showing distribution.Sari. Salah satu tahap yang paling menentukan dalam proses kartografi adalah pemilihan simbol untuk memetakan data. Hal ini disebabkan oleh kenyataan bahwa symbol itu banyak sekali macamnya. Manfaat peta sebagai media komunikasi akan sangat terasa bila symbol yang dipilih tepat atau cocok dengan maksud serta tujuan pembuatan peta tadi. Tulisan ini membahas bagaimana cara memilih serta menggunakan symbol untuk suatu persoalan, khususnya yang menyangkut masalah distribusi.

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