| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 53-66 |
| Abstraksi Narasi | : | The objective of this paper is to know how to obtain the posterior predictive density from ARX model under the Normal-Gamma and the Normal-Wishart Invers assumptions. The ARX model in this object, is built from a transfer function model: Some proposed method are proved analytically for k-steps ahead forecast. It is two-stages approach method that is proposed to provide an estimator of the posterior predictive density for any future observation. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 67-75 |
| Abstraksi Narasi | : | This article discusses the numerical solution of initial value problem of the second order of ordinary differential equation based on a rational approximation. We assume a rational function as the function solution of the second order ordinary differential equation (ODE). The function can be denote |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 81-91 |
| Abstraksi Narasi | : | The study of improving tomato plant quality (Lycorpersicum esculentum Mill) was conducted by mutation. The aims of the study were to determine the best of extracted parts of tobacco plant and its concertration that improve the quality of the tomato plant variety of Ratna. The experimental design was completely randomized design with 2 factors, and 5 replications. The first factor was qualitive measurenments consisted of parts of tobacco plant namely root, stem, and leaves. The second factors was the concentrations of the extracted part of tobaco plant; 0%, 1.5%, 3.0%, 4.5%, 6.0%, 7.5% and 9.0%. Data were analyzed by using ANOVA and the mean difference of each treatment was calculated by using LSD with alfa of 5%. The results indicated that extract of the root of tobacco plant increased the plant height, leaf wide, and fruit production. However, the flower formation was slower. It could be concluded that the extract of tobacco plant might cause poliploid but it was not enough for improving the quality of tomato plant. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 35-41 |
| Abstraksi Narasi | : | The basic assumption in regression analysis of the time series data is stationer.If the assumption is violated then the estimation and the festing for the parameters are bias. To test the stationary data, can be used testing of unit roots, the testing of degree of integration, and the Testing of Cointegration. The application in econimic is presented. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 31-34 |
| Abstraksi Narasi | : | Deskripsi abstrak ringkas tidak tersedia untuk artikel ini. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 8-12 |
| Abstraksi Narasi | : | Determination of the constant rate chemical reaction of lomustine (k) was studied by cyclic voltammetry based on the peak current anodic (ipa), the peak current cathodic (ipc),the peak potential anodic (Epa), the peak potential cathodic (Epc), the potential switching (EI), and the scan rate potential (v). The mechamism electrode reaction can be determined by plotting of ipc/ipa with v. The constant rate chemical reaction (k) of uramustine can be evaluated by connection of ipc/ipc with kt. The results showed that the mechanism of electrode reaction followed EC mechanism. The constant rate chemical reaction (k) of lomustine was 5.22/s. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 111-117 |
| Abstraksi Narasi | : | Culture of whole blood from infertile men and from fertile men, was done in vitro. In this study the infertile men were divided into three groups: azoospermia, oligozoospermia. The investigation was to know whether the spermiophage that induced in vitro, could be used as a test for cellular immune response to spermatozoa. For this purpose the correlation between spermatozoa cell count and migration inhibition test has been tested. The result of the study were: (1) spermiophage were found if the blood of fertile and infertile men were cultured together with their homolog, (2) there were differences of appearance frequency of spermiophage between fertile and infertile men, (3) There were differences frequency of spermiophage of infertile men except between oligozoospermia and normozoospermia groups. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 42-48 |
| Abstraksi Narasi | : | The linear estimation method has been used extensively in spatial probability function of hydrology and soil sciences. Both the certainty and uncertainnty parameter differences have been studied by the linear model and Bayes procedure. The results showed that the drift coefficient of the Bayes estimation were same as the linear estimation in term of minimum variance. |
| Nama Pengarang | : | - |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 92-110 |
| Abstraksi Narasi | : | A strong negative relation between latitude and species diversity has been documented on many occasions for both plants and animals, from marine, freshwater, and terrestrial habitats including parasitic species. Although many factors, both biotic and abiotic, have been recognized as being important in limiting species distribution, the general pattern in species diversity must be correlated to some climatic factor,or combination factors that changes in a consistent manner with latitude. Several factors such as average temperature, annual rainfall, and seasonallity could be candidates; however ecologist have not succeeded in finding a convincing link between species diversity and patterns in physical environment. Temperature is likely to be primary cause of latitudinal gradients in species diversity since temperature gradients exist in a consistent manner across latitudes. |
| Nama Pengarang | : | John Hendri, Suratman Umar, Muhammad Nur Aidi, Sutyarso, Hardoko Insan Qudus, Rudi Situmeang, Nairobi, Eti Ernawiati, Suharsono, La Zakaria, Tina Yunarti, R. Supriyanto, Zipora Sembiring, Suharsono, Aspita Laila, Agus Susanta |
| Nama Majalah/Jurnal | : | Jurnal Penelitian Sains dan Teknologi |
| Volume / Nomor Edisi | : | - |
| Nomor Halaman | : | 13-20 |
| Abstraksi Narasi | : | Methods of activation of zeolite has been reported to increase the adsorbent capacity. In the research, combination between acid and temperature treatment was investigated in term of three variables; variation of temperature from 150-350C with concentration of sulfuric acid 0.25 N, variation concentration of sulfuric acid from 0.1-0.3 N with temperature optimum and variation of heating time from 60-180 minute with temperature and concentration of sulfuric acid optimum. The effects of each treatment erfe determined based on adsorption capacity of amonium ion, surface area, and structure ascertation by x-ray diffraction. These results suggested that the combination of the treatment at optimum conditions increased the adsorption capacity of amunium ion from 8.207 ppm/gram to 9,022 pmm/gram zeolite and surface area from 38.11m^2/g to 53.32 m^2/gram, without changing the framework of structure. The optimum conditions was 0.2 N for sulfuric acid, temperature was 225C, and heating time was 120 minutes |
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