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INDONESIA
Jurnal Matematika Sains dan Teknologi
Published by Universitas Terbuka
ISSN : 14111934     EISSN : 24429147     DOI : -
Core Subject : Education, Agriculture,
Agriculture, Biological Sciences & Forestry Mathematics Other
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.
Arjuna Subject : -
Articles 6 Documents
 1 
Search results for , issue "Vol. 7 No. 2 (2006)" : 6 Documents clear
MODEL ARSITEKTUR POHON PADA HULU DAS CIANJUR ZONA SUB-MONTANA TAMAN NASIONAL GUNUNG GEDE PANGRANGO Arrijani; Boy J.A Lombok
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

Tree architectural model represents one of the important concepts to quip characteristic takson in plant morphology and plant taxonomic. Every tree grows at the watershed has a typical architectural model and different ability in rainfall transformation such as stemflow, throughfall, and interception. This research explores tree architectural models at upstream Cianjur watersheds in Mt. Gede Pangrango National Park. Sampling conducted by using plot method to chose 15 trees at sub-montana zone to measure IVI and elevation bevel. Results of the research indicate that there are 12 tree architectural models at upstream Cianjur watersheds. At sub-montana and montana zone models the architectural models are ATTIMS (1 sp), FAGERLIND (1 sp), KWAN-KORIBA (1 sp), MASART (1 sp), PETIT (3 sp) PREVOST (2 sp), RAUH (2 sp), ROUX (1 sp), SCARRONE (1 sp), STONE (1 sp,) and THEORETICAL I (1 sp).
CALENDAR VARIATION MODEL FOR FORECASTING TIME SERIES DATA WITH ISLAMIC CALENDAR EFFECT Suhartono
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

The aim of this paper is to develop a statistical model for explaining and forecasting the time series that contains Islamic Calendar effect. In time series literature, calendar variation is defined as a periodic and recurrent pattern with variation length period that usually caused by cultures and religions of people in a certain area. In Indonesia, the effect of the Eids holiday in many daily activities, such as transportation, inflation and consumption, is one example of calendar variations. This holiday happens on different month after three years or shift to previous month after at the same month on three years. This paper evaluates the disadvantage of seasonal classical time series model, such as Winter’s, Decomposition and ARIMA models, and develops a Calendar Variation model for forecasting time series that contain Islamic Calendar Effect. In this research, a real data about monthly sales of sardines are used as a case study. The results show that classical time series models, such as Winter’s, Decomposition and ARIMA models, cannot describe the calendar variation effect and yield invalid and unreliable forecast, particularly at the time (month) when the calendar variation happens. On the contrary, Calendar Variation model is a model that can explain precisely the impact of the calendar variation effect and gives valid and reliable forecasts.
ANALISIS VEGETASI PADA TEGAKAN YANG TERINVASI AKASIA (Acacia nilotica) DI TAMAN NASIONAL BALURAN, JAWA TIMUR Djufri
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

The research was done in Baluran National Park, Banyuwangi East Java in April until June 2004. The objectives of this research are: to determine species composition, importance value of species, diversity index and evenness index, similarity index, and distribution pattern of species. This research used quadratic method. The determination of the species distribution was calculated using Poisson distribution formula and classification of community using similarity index formula and cluster analysis. The results of this research indicated that, there were 63 species of plants including 18 families. The importance value was between 0,97-42,58, the diversity index was between 1,1504-2,7556 and evenness index was between 1,1067-1,7854. The result of classification community indicated that savanna Baluran National Park can be devided into three groups (a). Open savanna no A. nilotica stand, (b).savanna with density of A. nilotica stand 1500-3000 individuals/ha, and (c).savanna with dense A. nilotica stand > 3000 individuals/ha.
KANDUNGAN NON NUTRISI DAN BILANGAN PEROKSIDA KERUPUK KULIT (KERUPUK JANGEK) Lula Nadia
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

The aim of this research was to find the non nutrition compound of ‘kerupuk Jangek’. Several steps were used to determine: (1) the content of cholesterol, (2) the content of uric acid, (3) the content of peroxide, and (4) the hedonic value of ‘kerupuk Jangek’ storaged for several period of time. The HPLC with ELSD detector analysis showed that no cholesterol was detected in both samples of the beef skin crackers and the buffalo skin crackers. Using Photometer 4020, it was found that there was 0.64 – 0.7 mg uric acid in 100 gr of the beef skin crackers. The rate of peroxide in the beef skin cracker was 1.0 mg/kg sample after 4 – 5 weeks storage in 30°C condition. From hedonic analysis, it was found that ‘kerupuk Jangek’ being rejected by the panelist after 7 weeks storage in 30°C condition, and the content of peroxide was 1.83 mg/kg. It is suggested that, the skin crackers should be consumed before 7 week storage in room temperature and it is not recommended for hyperuricemia one.
KANDUNGAN ANTIOKSIDAN BEBERAPA LALAPAN Amril Latif
Jurnal Matematika Sains dan Teknologi Vol. 7 No. 2 (2006)
Publisher : LPPM Universitas Terbuka

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Abstract

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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Abstract

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.

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