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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 4 Documents
 1 
Search results for , issue "Vol. 1 No. 1 (1961)" : 4 Documents clear
Anatomites brochiiformis Welter var. rotundata Tjia Hong Djin
Journal of Mathematical and Fundamental Sciences Vol. 1 No. 1 (1961)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

DARI FOSIL-FOSIL CHEPALOPODA JANG TELAH DIKUMPULKAN di Basleo. Timor, oleh salah satu espedisi geologi dari Fakultas Ilmu Pasti dan Ilmu Alam, Universitas Indonesia di Bandung, beberapa telah diselidiki, antara lain species Anatomites brochiiformis. Untuk spesies ini, dua varian dapat ditentukan : ialah Anatomites brochiiformis var.rotundata jang mempunjai mulut dengan tinggi lebih ketjil  daripada lebar, dan Anatomites brochiiformis var. elongata jang mempunjai mulut dengan tinggi lebih besar daripada lebar. 
Coriolis Concept : Useful or Not? John A. Feyk
Journal of Mathematical and Fundamental Sciences Vol. 1 No. 1 (1961)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

GAJA CORIOLIS DI SINI DIURAIKAN SECARA KWALITATIP. Perhitungannja didasarkan pada sistem salib sumbu-sumbu jang tetap dan lagi atas sistem salib sumbu yang bergerak (gaja coriolis). Diterangkan bahwa tjara dengan memakai sumbu jang tetap ini, adalah lebih mudah daripada tjara dengan perhitungan coriolis jang matematis komplex. Effek coriolis adalah menarik sekali, karena ini dapat memberi kesan yang salah, umpamanja untuk seorang pengamat satelit dari bumi. Djalan yang ditempuh satelit sesungguhnja terletak dalam bidang datar, tetapi si pengamat tadi melihatnja sebagai djalan lengkung. 
The Behaviour of Blood Chloride During Osmo-regulation in the Sawahcrab (Paratelphusa Conveka) Lim Lian Nio
Journal of Mathematical and Fundamental Sciences Vol. 1 No. 1 (1961)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

PARATELPHUSA CONVEXA, JG MULA-MULA ADALAH CHEWAN laut dan sekarang hidup di air tawar dan djelas menggambarkan kemampuannja untuk memelihara komposisi darahnja dalam berbagai matjam keadaan sekitarnya (osmoregulasi).Bila ketam sawah itu dibiarkan di dalam air suling, maka mula-mula kadar chlorida di dalam darahnja menurun tetapi kadar chlorida tersebut tjepat kembali seperti semula. Kedjadian ini mungkin disebabkan karena pelepasan chlorida di dalam chewan itu. Pelepasan chlorida itu mungkin dipengaruhi oleh berbagai faktor, misalnja konsentrasi total daripada sekitarnja, konsentrasi chlorida, atau konsentrasi daripada ion-ion lainnja. Banjak dari kemungkinan-kemungkinan itu telah ditjoba dengan memakai tjampuran-tjampuran garam  buatan dan kadar chlorida dalam darah telah ditentukan setjara kwantitatip (micro Volhard). Ternjata turunnja chlorida darah dalam air suling itu tidak hanja disebabkan karena kekurangan kadar chlorida. Faktor-faktor jang sesuai sudah diselidiki  dan hubungan kwantitatip antara kadar chlorida darah dan pelepasan chlorida telah dianalisa. 
Laporan Sementara Mengenai Geologi Daerah Ombilin Pesisir Utara Danau Singkarak John Katili; Kamal Kamal
Journal of Mathematical and Fundamental Sciences Vol. 1 No. 1 (1961)
Publisher : Institute for Research and Community Services (LPPM) ITB

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Abstract

DETAILED GEOLOGICAL MAPPING WAS CARRIED OUT IN THE OMBILIN AREA, North of Lake Singkarak in order to study more closely the Late Palaeozoic_Early Mesozoic volcanic sedimentary deposits known as the Silungkang formation, the Triassic and the so-called Pre-Permian granite of Guguk Bulat. Some fusulinas of the Silungkang formation were determined and considered to be as Permian age*.The Silungkang formation is correlated with similar sedimentary volcanic series of Gk. Gie Sie Top Top and the Lake Air Tawar of North Sumatra. Field investigations have revealed that a part of the limestone in the upper stream of the river Lurah Tambang does not belong to the Triassic, but to the Silungkang formation. Furthermore it became evident that the Pre-Premian granite does not exist, on the contrary we have to consider the arkosic rock of Guguk Bulat  as a part of the Tertiary quartzstandstone formation, resulting from weathering of a younger granite, possibly Cretaceousin age. The quartzdiorite which occurs as small bodies between the granite and the Pre-Tertiary volcanic products, is considered as altered andesitic rocks of the Silungkang volcanic series, caused by the formation of granites.*) The determination was done by MARKS, former lecturer in palaeontology, of the faculty of Science, University of Indonesia, Bandung  

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