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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 4 Documents
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Search results for , issue " Vol 11 No 1 (2010)" : 4 Documents clear
PENGOLAHAN LINDI SEBAGAI PUPUK CAIR UNTUK MENDUKUNG PENGEMBANGAN TPA SAMPAH LESTARI Nurhasanah, Nurhasanah; Darusman, Latifah K; Sutjahjo, Surjono Hadi; Lay, Bibiana Widiati
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

A laboratory scale research to obtain environmentally safe effluent and liquid fertilizer from leachate from Final Waste Disposal Site in Galuga owned by Regional Government of Bogor City was conducted from July 2006 through to April 2007. The experiment was initiated by aerating the leachate in 4 difference aeration rates (0, 10, 30 and 70 liters/minute) followed by processing the sediment to product the liquid fertilizer. The experiment of production liquid fertilizer was carried out by adding lime with different dosage into sediment generated from processing by aerating at 70 liters/minute followed by centrifugation process or secher. Further, the liquid fertilizer generated from such experiment was applied to chilis planting (Capsicum annum). The research found that the processing conducted by aerating at the rate 70 liters/minute was the most effective in reducing pollutant from leachate. The addition of 1000 ppm CaO or Ca(OH)2 limes in sediment from aeration is the most effective in depositing the dissolved material compared to the addition of limes in other dosage. Liquid fertilizer generated through the addition of 1000 ppm CaO have the content of N = 375,83 ppm, P = 121,44 ppm, K = 948,11 ppm, Ca = 827,20 ppm, Mg = 959,50 ppm, S = 48,53 ppm, Cu = 8,23 ppm, Zn = 30,02 ppm, Mn = 230,57 ppm, Fe = 320,95 ppm, Pb = 10,34 ppm, Cd = 7,46 ppm and Cr = 2,05 ppm. The use of liquid fertilizer generated by adding 1000 ppm CaO was the most effective in enhancing vegetation growth and production of chili. The non essential elements (Pb, Cd and Cr) in fruits from vegetation given liquid fertilizer produced from such treatment did not exceed tolerable threshold.
KOMPETENSI PENYULUH DALAM MENGAKSES INFORMASI PERTANIAN (KASUS ALUMNI UT DI WILAYAH SERANG) Huda, Nurul; Setijorini, Ludivica Endang
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

The objectives of this study were to describe the competence of the agriculture extension workers in terms of their access on agricultural information. By using an explanatory research design and a census method, all population of agricultural extention workers in Serang Regency, West Java were used as respondent. Data were collected by questionnaire and analyzed with descriptive and regression analysis. The results of this study indicated that generally no relation was found between factors on individual characteristics, learning activities at UT, other learning source, environment factors, and their competence on information access. It was found that their competence level was categorized as moderate. The same level was also on their competence aspects, those were cognitive, affective, and psychomotor. Related to their perfomance in innovation implementation, the findings indicated that the level was moderate. In conclusion, the competence of agriculture extension workers which was categorized as moderate need to to be improved in order to give a better service to farmer.  
BEBERAPA KONSEKUENSI SITUASI MEDIASI SEMPURNA PADA STRUKTUR KORELASI, KONTRIBUSI MEDIATOR, DAN UKURAN SAMPEL Suhardi, Deddy A; Isfarudi, Isfarudi
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

A very popular article by Baron and Kenny (1986), later extended by Kenny, Kashy, and Bolger (1998), recommended to social psychologists a test of mediation based on a set of steps involving correlations and regression weights. The serial published tests of mediation has come to be known as the Baron-Kenny approach. By the Baron-Kenny approach, a simple complete mediation is to be indicated which is a test of the direct path between an independent variable (X) and a dependent variable (Y) with a mediator variable (M) controlled is not significant. A simple mediation model has three correlations of their variables each. According to sequential regression analysis on a simple mediation model, a mediator M come after an independent variable X exist in the model, has a contribution of the mediator. Otherwise, sample size is a critical component to test as well as statistically significances. We argue the importance of investigating condition and interrelation of the three correlations, sequential contribution of the mediator, and sample size in the simple complete mediation cases by using hypotetical data generated by Microsoft Excel. We indicate some general consequences of simple complete mediation cases that are: (i) average of correlation XY is lower than average of correlation XM that lower than average of correlation MY; (ii) average contribution of mediator, indicated by R2 change, at interval of 23% up to 27%; (iii) distribution of effects X on Y when M controlled is influenced by sample size, the higher sample size, the lower distribution is; and (iv) average of mediation effects is at interval: 0.4 and above for levels of small sampel size (10 up to 40), between 0.2 and 0.4 for levels of medium sample size (50 up to 300), and under 0.2 for levels of large sample size (500 or above).  
KERJA PASAK BUMI (Eurycoma Longifolia. JACK) TERHADAP TINGKAH LAKU DAN LIBIDO TIKUS PUTIH JANTAN Pratomo, Hurip; Winarto, Adi; Rusdiyanto, Edi
Jurnal Matematika Sains dan Teknologi Vol 11 No 1 (2010)
Publisher : LPPM Universitas Terbuka

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Abstract

A research to observe sexual behavior or libido because of the treatment of pasak bumi (Eurycoma longifolia Jack) boiled water was conducted. Observation used a designed cage within an estrus female white rat partitioned by wire net. There were four variations doses of pasak bumi boiled water administered to white male mature rats. The first dose was 18 mg/200 g bw (bw= body weight), the second dose was 100 mg/200 g bw, the third dose was 200 mg/200 bw, and the control that administered aquadest 1 ml. Male rat sexual behavior characteristics were: 1. Coming near female partition, 2. Scratching/nipping partition, 3. Meet face to face. The result of the analysis showed that libido stimulated by administered pasak bumi boiled water. The best effect of libido raised by administered the first dose = 18 mg/200 g bw. Meanwhile the effect of libido of dose 2 and 3 better than the control group aquadest but lower than the effect of dose 1 did.  

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