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Jurnal Matematika & Sains
Published by Institut Teknologi Bandung
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
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Articles 3 Documents
 1 
Search results for , issue " Vol 1, No 1 (1996)" : 3 Documents clear
Beberapa Aplikasi dari Ultraproducts di Dalam Teori Model Oki Neswan
Jurnal Matematika & Sains Vol 1, No 1 (1996)
Publisher : Institut Teknologi Bandung

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Abstract

Pengertian filter pertama kali dikemukakan oleh H. Cartan. Pembahasan kekonvergenan yang lengkap dengan menggunakan filter dapat ditemukan dalam N Bourbaki. Dari konsep filter muncullah ultra filter dan ultraproduct yang belakangan memainkan peranan penting di berbagai cabang matematika khususnya topologi, aljabar, dan juga teori model.             Dalam makalah singkat ini kita ingin menyelidiki peranan dan pemakaian ultraproduct dalam teori model. Di dalam teori model konstruksi model melalui konstanta-konstanta, fungsi-fungsi Skolem, dan rantai elementer telah umum digunakan untuk membangun model baru dari model-model tersedia. T. Skolem yang mula-mula menggunakan ultraproduct di dalam teori model. Ia menggunakan bentuk khusus dari ultraproduct, yaitu ultrapower, untuk membangun model nonstandar lengkap complete nonstandard untuk aritmetika. Ini menunjukkan bahwa ultra product juga dapat berperan sebagai alat konstruksi model. Selain itu ultraproduct juga sangat penting dalam analisis nonstandard (nonstandard analysis).
Aplikasi Metoda Elemen Hingga Dengan Algoritma Crank-Nicolson Dalam Penyelesaian Persamaan Difusi Panas Untuk Pembuatan Sel Surya Silikon Amorf (a-Si) Terpadu Ridwan Abdullah Sani; M. Barmawi; Toto Winata; Sukirno Sukirno
Jurnal Matematika & Sains Vol 1, No 1 (1996)
Publisher : Institut Teknologi Bandung

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Abstract

The solution of thermal diffusion equation computed numerically by finite element method is used to determine optimum conditions of laser irradiations in the solar cell fabrication. Structure discretization is analyzed in axisymmetric triangular ring elements. The program are codes in written using Fortran 77 language. The Crank-Nicolson algorithm and Fortran 77 IMSL library were used in solving stiffnen matrix equations of the structure. The convergence of the results are shown 50, 98, and 140 elements. The temperature distribution of at the center of laser beam in the all three layers of a-Si solar cells is also shown and superior compared with that of Kishi et al [19].
Persebaran Meruang Forficula auricularia (Dermaptera: Forficulidae) Pada Awal Perioda Pencarian Makan Tati Suryati Syamsudin Subahar
Jurnal Matematika & Sains Vol 1, No 1 (1996)
Publisher : Institut Teknologi Bandung

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Abstract

The spatial distribution of the European earwig in the early of the free foraging phase were analysed using dispersion index and spatial autocorrelation index. The observation found that during investigation period, were dominated by third instar larvae. Horizontal trapping above the ground showed that the the distribution per trap was very aggregative with dispersion index varies from 16.64 to 33.89. Spatial index of autocorrelation varies from -0.65 to 3.71, which indicate that earwigs chose certain place in their movement during this period.

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