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Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111942     EISSN : 24433586     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 357 Documents
STUDI KANDUNGAN NUTRISI LIMBAH MEDIA TANAMJAMUR TIRAM PUTIH (PLEUROTUS OSTREATUS) UNTUK PAKAN TERNAK RUMINANSIA ES, Eko Yuliastuti; Susilo, Adhi
Jurnal Matematika Sains dan Teknologi Vol. 4 No. 1 (2003)
Publisher : LPPM Universitas Terbuka

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Abstract

Growth media waste of white oyster mushroom cultivation can be used as ruminant feed. We observed the nutrient content of the growth media waste. The focus is on the protein, carbohydrate, mineral and crude fiber. The protein, calcium and phosphor content of white oyster mushroom growth media waste is higher than the protein content in the media before it was used for mushroom cultivation. However, the fat content is lower after the media was used than control (the media before it was used). The difference is caused by microorganism degradation. The growth media waste can be used as ruminant feed up to 75 % of total forage dry matter without any negative effect.
SUATU STUDI TENTANG UJI HIDUP DIPERCEPAT TEGANGANBERTINGKAT: PERKEMBANGAN MUTAKHIR Soejoeti, Zanzawi
Jurnal Matematika Sains dan Teknologi Vol. 4 No. 1 (2003)
Publisher : LPPM Universitas Terbuka

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Abstract

This paper is reviewing the development of life testing data analysis of lie testing conducted in normal stress condition; stronger than normal stress (or constant stress accelerated life testing); and step stress accelerated life testing. It used exponential life test distribution model, log-normal accelerated model and tempered failure rate step stress model. It is completed by describing several problem for the future research.
PENAKSIRAN FUNGSI DENSITAS UNTUK SUATU DATA DENGAN PENAKSIR KERNEL Sunandi, Netty; Malau, Ribut Alam
Jurnal Matematika Sains dan Teknologi Vol. 4 No. 1 (2003)
Publisher : LPPM Universitas Terbuka

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Abstract

One of the estimating of density function which has been recognized is histogram. Histogram has some weaknesses, i.e. the different starting points and the width of class intervals. Different starting points or different class intervals result different histogram forms. This article is about the estimating of the density function by using kernel function. This method does not require the determination starting points and the interval class width. The obtained curve has a smooth density function, a small sampling variance, and the important information from data are still kept.
PERHITUNGAN TAMPANG LINTANG DIFERENSIAL HAMBURAN ELASTIK ELEKTRON-ARGON PADA 10,4 EV DENGAN ANALISIS GELOMBANG PARSIAL Settings Paken Pandiangan; Suhartono
Jurnal Matematika Sains dan Teknologi Vol. 5 No. 2 (2004)
Publisher : LPPM Universitas Terbuka

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Abstract

It has been calculated theoretically using the partial wave methods for the elastic scattering differential cross-section of electron-argon at 10.4 eV.  The wave function from Schrodinger equation  was computed by the Numerov integration methods.  For simplicity of scattering system , the Gaussian potential form has been employed.  For comparison between theoretical and experimental approach then we used the test. The  for this research is 2.386 that shows this calculation is good. 
PENGARUH KADMIUM TERHADAP GANGGUAN PATOLOGIK PADA HATI TIKUS PERCOBAAN Ratnaningsih, Anna
Jurnal Matematika Sains dan Teknologi Vol. 4 No. 1 (2003)
Publisher : LPPM Universitas Terbuka

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Cadmium is a toxic heavy metal which causes of environmental pollution and toxic effect to the human and animal life. The specific objectives of the research were 1) to analyze cadmium content of rice and 2) to identify the effect of cadmium on liver function. The failure of liver?s function is indicated by accumulation of cadmium on liver, SGOT value and SGPT value in the serum of Wistar rats. Cadmium was administered by adding it in drinking water. The levels were composed based on highest level of cadmium found in rice. This study was performed by using four cadmium?s concentrations on drinking water which are 0 mg/L (control); 0,06 mg/L; 6,6 mg/L and 66 mg/L. Observation was conducted during 0 week; 2 weeks; 4 weeks; 6 weeks and 8 weeks. The result showed that the exposure of cadmium through drinking water caused pathophysiology effect in rats such as increasing of enzymes SGPT & SGOT and accumulation of cadmium in liver. Pathological effects such as cell degeneration of liver were also observed.
KANDUNGAN ANTIOKSIDAN BEBERAPA LALAPAN Amril Latif
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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The product of fat oxidation on food has a significant effect towards human?s health, especially those who often consume it. It has been known for long time that vegetables, fruits, and fish have an ability to stifle Free Radical through the activities of antioxidant belonged to them. Among some kinds of antioxidant, natural antioxidant is the one which does not have any side-effects. This research is aimed to know the ability of antioxidant consisted in kemangi leaves, kemangi, rende, poh-pohan, and lettuce to stifle Free Radical.  Based on the result of spectrophotometer test towards those dishes of raw vegetables (lalapan), kemang leaves have the most antioxidant with 0,488 absorption, followed by rende leaves with 0,394 absorption, kemangi leaves with 0,326 absorption, poh-pohan leaves with 0,176 absorption, and lettuce with 0,1635 absorption. Based on the spectrum analysis, it can be seen that lettuce leaves have more effective antioxidant to stifle Free Radical.
KONTRIBUSI TEKNOLOGI PENGENDALIAN HAMA TERPADU PADA PENURUNAN PENGGUNAAN PESTISIDA: KASUS PRODUKSI PADI DI YOGYAKARTA Joko Mariyono
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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The objective of this study is to examine the contribution of integtated pest management technology to significant decrease in use of pesticides in rice production.  This study was conducted in Yogyakarta, where the technology has been intensively disseminated through farmer?s field school. Aggregate data shows that the use of pesticides declines significantly after the introduction of the technology.  A constant elasticity of input demand model was employed in this study. The results of the study show that IPM technologi was increasingly disseminated during 1989-1998. At the same period, pesticide use declined significantly. The decrease in pesticide use was affected by the increase dissemination of IPM technology and the increase in relative price of pesticides.
KAJIAN BEBERAPA UJI KENORMALAN DAN KAITANNYA DENGAN ASUMSI KENORMALAN PADA BEBERAPA UJI STATISTIKA Santoso, Agus
Jurnal Matematika Sains dan Teknologi Vol. 6 No. 1 (2005)
Publisher : LPPM Universitas Terbuka

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T-test is proposed as a parametric test to evaluate mean of population(s).  Therefore, it is assumed that the data are normally distributed. Recently simulation based research reveal that t-test are robust against non-normality assumption, as long as the distribution of the data are symmetric. For that reason, it is interesting to evaluate the normality test that commonly used before the t-test is applied, particularly on its power and its suitability on symmetrical assumption of t-test on distribution of the data.  On this research, the evaluation on normality test was focused at several tests, which are Anderson Darling, Kolmogorov-Smirnov, Ryan-Joiner, and normality test based on skewness and kurtosis, wether the t-test was restricted in evaluation of mean of one population. The simulation reveals that, in general, Anderson-Darling has greater power than the other test in evaluating the normality of the distribution of the data, wether the normality test based on skewness and kurtosis have greater suitability on symmetrical assumption of t-test on distribution of the data. Hence, it is recommended that the normality test based on skewness and kurtosis are used to evaluate the symmetrical assumption of t-test on distribution of the data.
TINGKAT EFISIENSI METODE REGRESI ROBUST DALAM MENAKSIR KOEFISIEN GARIS REGRESI JIKA RAGAM GALAT TIDAK HOMOGEN Sugiarti, Harmi; Megawarni, Andi
Jurnal Matematika Sains dan Teknologi Vol. 6 No. 1 (2005)
Publisher : LPPM Universitas Terbuka

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This paper aims to compare the relative efficiency of weighted least square (WLS), ordinary least square (OLS) and robust regression method in regression coefficient estimation when the error term is not homogen.   The assumption of homegeneous error variance underlying the ordinary least square (OLS) is very important to get the best linear unbiased estimation of the regression coefficients. The investigation compares the methods in calculating efficiency of booth simulation and experimental data.   In conclusion, the WLS method is relatively more efficient than OLS and Robust Regression methods.
KARAKTERISASI SIFAT TOLERANSI TERHADAP CEKAMAN KERING KACANG TANAH (ARACHIS HYPOGEGA L.) VARIETAS NASIONAL PADA TAHAP PERKECAMBAHAN Adisyahputra Adisyahputra; Settings Reni Indrayanti; Dwi Eldina
Jurnal Matematika Sains dan Teknologi Vol. 5 No. 1 (2004)
Publisher : LPPM Universitas Terbuka

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The aim of this research is to determine character for drought tolerance character prediction of peanut national variety on germination phase using PEG 6000 solution. Preliminary test using drought tolerance genotipes (US 605 and US 693), susceptible genotipe (PI 409) conducted to evaluate appropriate concentration of PEG solution as drought treatment. PEG 10% is appropriate for drought treatment. Experiment using factorial random complete design with eight national varieties, Badak, Gajah, Jerapah, Kelinci, Komodo, Macan, Panther, Singa, and PEG solution. Minimum water uptake for germination is obtained from proportion between seedling weight to seed weight with seed weight. Root length, number of lateral root and seedling dry weight (without cotyledon) are counted on seventh day after germination. Seed germinated using UKDdp method. ANOVA two way for water uptake variable, ANOVA one way for root length and number of lateral root and seedling dry weight (without cotyledon) is used to analyze data, continue with DMRT and Pearson product moment correlation between minimum water uptake for germination and root length, seedling dry weight (without cotyledon). And Spearman correlation is used between minimum water uptakes for germination with number of lateral root. The results base on this research are, drought tolerance characterization of peanut national variety could evaluate on germination phase simulated by 10% PEG 6000 solution. (2) Minimum water uptake for peanut seed germination could be use as determine character to drought (3) Base on minimum water uptake for germination, Gajah and Panther grouped as drought tolerance varieties, Macan, Jerapah, Singa and Badak as medium tolerance varieties, and Komodo and kelinci as susceptible varieties.(4) In peanut, root length, number of lateral root and seedling dry weight (without cotyledon) can not be use as determine character to drought on germination phase.

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