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INDONESIA
Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111934     EISSN : 24429147     DOI : -
Merupakan media informasi dan komunikasi para praktisi, peneliti, dan akademisi yang berkecimpung dan menaruh minat serta perhatian pada pengembangan Matematika, ilmu pengetahuan dan teknologi. Diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Terbuka.
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Articles 6 Documents
Search results for , issue "Vol. 7 No. 1 (2006)" : 6 Documents clear
KETEGARAN UJI-t TERHADAP KETIDAKNORMALAN DATA Agus Santoso
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (334.682 KB) | DOI: 10.33830/jmst.v7i1.620.2006

Abstract

t-test used to test means of two populations assumes that each population is normally distributed. Theoretically, violation of the assumption makes the result of the test invalid. This research evaluates the robustness of the t-test on various value of sample size using three types of distribution: normal, symmetric non-normal, and not symmetric non-normal. Different computation techniques of t-value which depend on the variance of the two populations were also employed. The simulation showed that t-test used to test mean of two populations is not influenced by non-normality of the population distribution. The exploration of distribution of the difference between two samples means showed that its distribution was normal. Therefore, the robustness against non-normality of the t-test was the consequences of the difference between two sample means that normally is distributed.
METODE ELEMEN HINGGA UNTUK PENYELESAIAN PERSAMAAN SCHRÖDINGER ATOM HIDROGENIK Paken Pandiangan; Supriyadi Supriyadi; A Arkundato
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.032 KB) | DOI: 10.33830/jmst.v7i1.623.2006

Abstract

The research computed the energy levels and radial wave functions of the Hydrogen Atom. The method used for computation was FEM (finite element method). Using the variational method approach, FEM was applied to the action integral of Schrödinger equation. This lead to the eigenvalue equation in the form of global matrix equation. The results of computation were depended on boundary of the action integral of Schrödinger equation and number of elements. For boundary 0 - 100a0 and 100 elements, they were the realistic and best choice of computation to the closed analytic results. The computation of first five energy levels resulted E1 = -0.99917211 R∞, E2 = -0.24984445 R∞, E3 = -0.11105532 R∞, E4 = -0.06247405 R∞ and E5 = -0.03998598 R∞ where 1 R∞ = 13.6 eV. They had relative error under 0.1% to the analytic results.
PENDUDUK DAN KEBUTUHAN PANGAN DI INDONESIA 2005-2050: SUATU PROYEKSI Rachmini Saparita
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (302.616 KB) | DOI: 10.33830/jmst.v7i1.626.2006

Abstract

The aim of this study was to identify population growth during 1960-2002, and also its projection until 2050. The study also analyzed its impact and look for alternative policies in overcoming the problem to fulfill food security. The model used in the study was dynamic system approach which analyzes previous events to predict the upcoming condition. The study result indicated that the population increased rapidly, and was predicted would continue growing fast. Population growth and food requirement per capita determined the level of requirement of total food. To reach food security, the requirement would be better fulfilling by domestic production and did not depend on import. The policy alternative, which consisted of farm harvest enlargement and technological adoptions, were proposed to meet domestic production exceeding the requirement.
KAJIAN PENGARUH KADAR GULA DAN LAMA FERMENTASI TERHADAP KUALITAS NATA de SOYA Siti Nurhayati
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (189.03 KB) | DOI: 10.33830/jmst.v7i1.627.2006

Abstract

The aim of the research was to determine the effect of sugar content, time length of fermentations and their interaction on the qualities of the Nata de Soya. The design of the experiment was factorial 3x2 and arranged by the Randomized Complete Design (RCD), with three replications. The first factor was sugar content. G1= 100 g sucrose/l waste of soya, G2= 150 g/l and G3= 200 g/l. The second factor was days of the fermentation F1= 7 days, F2= 14 days. The result showed that (i) the adding of sugar content was not affected the weight, temperature, acidity, moisture content, fiber content and protein content of the Nata de Soya. (ii) The days of fermentation were significant in affecting the weight of the Nata de Soya, but not significant for other parameters. The maximum weight (418,411g) was reached at 7 days of the fermentations. (iii) The interaction between sugar content and time length of fermentations influenced acidity.
ANALISIS KANDUNGAN ZAT GIZI SOUN GANYONG (Canna edulis) DAN DAYA TERIMA KONSUMEN Trimurti Artama; Eko Yuliastuti E.S
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.244 KB) | DOI: 10.33830/jmst.v7i1.628.2006

Abstract

Food resistance will be strengthened with diversity of food products. In order to augment raw materials for soun, a variety of white starch noodle, a research was conducted using starch of ganyong (Canna edulis). The purpose of the research was to survey the nutrient content and consumer acceptance of soun ganyong. Nutrient content was analyzed by proximate method and consumer acceptance was analyzed by organoleptic test. The result showed that carbohydrate content was 83.86% to 85.12% higher than the carbohydrate of white rice, main food supply of the population. Therefore, it can be suggested that soun ganyong be used as supplement for the carbohydrate food supply. The organoleptic test showed that consumers prefer (acceptability) the color, taste, and aroma of the white variety than the blue one, while the texture for both varieties was generally accepted.
FORMULASI MODEL KADAR KOLESTEROL SERUM MELALUI PENDEKATAN UKURAN SKINFOLD PADA ORANG DEWASA Ila Fadila
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 1 (2006)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.111 KB) | DOI: 10.33830/jmst.v7i1.629.2006

Abstract

The study was conducted to explore the relationship between anthropometric measurement, i.e. skinfold thickness and cholesterol consentration in adult male and female blood. Other variables assumed as confounders including respondent characters namely: age, sex, ethnic, smoking habit, and activity. Analysis was done to a data from Health and Nutrition Survey on Adult on six cities in Indonesia. Prediction model of serum cholesterol with nutritional status assessment was developed by multiple regression analysis. Backward elimination procedure was used for model processing. The study result indicated that there was positive correlation between cholesterol and skinfold, age, and ethnic. Prediction model of serum cholesterol can be showed: Serum Cholesterol = 153,58 + 0,36 Skinfold + 0,34 age – 1,46 Sex – 48,71 Activity + 27,84 Ethnic

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