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Jurnal Ilmu Dasar
Published by Universitas Jember
ISSN : 24425613     EISSN : -     DOI : https://doi.org/10.19184/jid.v24i2.36657
Core Subject : Education, Engineering,
Control & Systems Engineering Mathematics
Jurnal ILMU DASAR (JID) is a national peer-reviewed and open access journal that publishes research papers encompasses all aspects of natural sciences including Mathematics, Physics, Chemistry and Biology. JID publishes 2 issues in 1 volume per year. First published, volume 1 issue 1, in January 2000 and avalaible in electronically since 2012 with ISSN 1411-5735 (Print) and avalaible in electronically since 2012 with ISSN 2442-5613 (online). Jurnal ILMU DASAR is accredited SINTA 3 by the Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia (Kemendibukristek) No. 152/E/KPT/2023 (September 25, 2023), Ministry of Research, Technology and Higher Education of the Republic of Indonesia (RISTEKDIKTI), No. 200/M/KPT/2020 (December. 23, 2020). All accepted manuscripts will be published worldwide JID has been indexed in DOAJ, Dimension, OCLC WorldCat, PKP Index, Crossref, Google Scholar, Base, Garuda, and OneSearch. JID have been collaborated in KOBI-ID (Konsorsium Biologi Indonesia) and HKI (Himpunan Kimia Indonesia) since 2017.
Arjuna Subject : Matematika - Kontrol dan Optimasi
Articles 15 Documents
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Search results for , issue "Vol 12 No 1 (2011)" : 15 Documents clear
Outlier Detection in Observation at Multivariate Linear Models with Likelihood Displacement Statistic-Lagrange Method Makkulau Makkulau; Susanti Linuwih; Purhadi Purhadi; Muhammad Mashuri
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

There are two different outliers, i.e outlier in observations and outlier in models. The existing outlier detection method in models is using common Likelihood method. The limitation of this method is the optimal value produced might be not the real optimal values. This research yields a method for outlier detection in multivariate linear models with Likelihood Displacement Statistic-Lagrange method (LDL method). This method uses multiplier Lagrange with constraint the confidence interval of parameter’s vector. This parameter’s vector is obtained from the data set which is outlier free. This parameter estimation process uses numerical method with Karush-Kuhn Tucker condition in nonlinear programming. This method compares between LDL value and the table F value that follows the distribution of F value to indentify the outlier in models.
Development System and Reconstruction Method of Translation-Rotation Computed Tomography Using Efficient Sampling Nuril Ukhrowiyah; Khusnul Ain
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Translation-rotation computed tomography system has been successfully built on this research. The system can be used for the scanning process with sampling method square and hexagonal. It also has been obtained interpolation and reconstruction methods are able to produce reconstruction images fast and accurate. Translation-rotation computed tomography system was built by assembling several instruments that have been made and have existed in the laboratory. Performance of the system was tested by scanning test object. Scanning process has been conducted with the circular test object from metal. Scanning process carried out by performing various of three resolutions, i.e. 31 pixels × 31 pixels, 63 pixels × 63 pixels and 127 pixels × 127 pixels. The sinogram data are square and hexagonal patterns. The sinograms are reconstructed by SCFBP (Summation Convolution Filtered Back Projection) and ART (Algebraic Reconstruction Technique) reconstruction method. Hexagonal sinogram pattern has been interpolated by vertical, horizontal and cross interpolation before reconstructed by ART and SCFBP reconstruction method. Reconstruction image of hexagonal pattern were analyzed by comparing the line profile and its rmsd value of the reconstruction image of square pattern. Performance of the constructed system in the research produced reconstruction image appropriated with objects test. The best interpolation for hexagonal sinogram pattern is cross interpolation. The ART methods produced image reconstruction better than SCFBP reconstruction methods.
On The Existence of Non-Diregular Digraphs of Order Two Less than the Moore Bound S Slamin; Mirka Miller
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

A communication network can be modelled as a graph or a directed graph, where each processing element is represented by a vertex and the connection between two processing elements is represented by an edge (or, in case of directed connections, by an arc). When designing a communication network, there are several criteria to be considered. For example, we can require an overall balance of the system. Given that all the processing elements have the same status, the flow of information and exchange of data between processing elements will be on average faster if there is a similar number of interconnections coming in and going out of each processing element, that is, if there is a balance (or regularity) in the network. This means that the in-degree and out-degree of each vertex in a directed graph (digraph) must be regular. In this paper, we present the existence of digraphs which are not diregular (regular out-degree, but not regular in-degree) with the number of vertices two less than the unobtainable upper bound for most values of out-degree and diameter, the so-called Moore bound.
A Study of Solid-Liquid Extraction with HF And HNO3 as Solvent for Determination of Cr and Cu in the River Sediment near the Muria Nuclear Power Plant Imelda Fajriati; Malawati Rizkiyah; Muzakky Muzakky
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

A Study of solid-liquid extraction for determination of Cr and Cu in the river sediment near the Muria Nuclear Power Plant has been studied. The river sediment assayed is in Kancilan, Balong, Suru, Dombang, and Wareng rivers. A study of solid liquid extraction focus on the optimum condition of extraction such as: concentrations of HF and HNO3 as are solvent, the extraction time, the accurate of this method; and comparing HF+ HNO3 solvent ability with HNO3 4N + HCl 0.7N and HCl 0.5N in extracting Cr and Cu in the river sediment. Determination of Cr and Cu concentration uses Atomic Absorpton Spectrometry. The research result shows that the optimum condition of extraction obtained in HF and HNO3 concentrations is 40% and 65% v/v respectively; and the extraction time is 5 hours. This research method shows good accuracy that is 84.810 % and 102.461 % for Cr and Cu respectively. In comparing the solvent ability to extract metal, it is obtained that HF 40% + HNO3 65% solvent is the best solvent in Cr metal extraction, whereas HNO3 4N + HCl 0.7N solvent is the best solvent in Cu metal extraction from the river sediment sample.
Pore Structure and Morphology Characterizations of Mesoporous ZSM-5 Synthesized at Various Aging Time Djoko Hartanto; Tri Esti Purbaningtias; Hamzah Fansuri; Didik Prasetyoko
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Mesoporous ZSM-5 has been successfully synthesized at various aging time of 6, 12 and 24 h. Mesoporous ZSM-5 was synthesized using cetyltrimethylammonium bromide (CTABr) as a template. Synthesis was carried out hydrothermally with aging and crystallization temperature at 60oC and 150oC. XRD patterns of the resulted material showed diffraction lines at 2θ = 23o and at small angle (2θ < 5o) which is characteristic of the structure of ZSM-5 and the existing of the mesoporous material. It was found that crystallinity of the sample increased at longer aging time. The result of nitrogen gas sorption analysis showed that all samples have pore size about 3,8 nm. The porosity of ZSM-5 decreased with shorter of aging time. ZSM-5 synthesized at 6 h aging time has the highest porosity of 72.57%. Aging time also affected the particle size, the longer the aging time, the smaller the particle size. The particle size was ranging 1.25 – 1.0 μm.
Antimicrobial Activity of the Extract and Fraction of Red Betel Leaf (Piper betle Linn.) Julia Reveny
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Antimicrobial activity of ethanolic extract of red betel leaf (Piper betle Linn.), n-hexane fraction and ethyl acetate against Staphylococcus aureus, Escherichia coli and Candida albicans had been carried out. Red betel leaf powder was extracted with 80% ethanol, followed fractionate with n-hexane and ethylacetate. The result was tested in vitro with agar diffusion method using a steel cylinder. Phytochemical screening test was performed to betel leaf powder, while the extract and each fraction were tested with antimicrobial activity in vitro. The thin layer chromatography (TLC) was performed with stationary phase silica gel GF 254 and moving phase of n-hexane: ethyl acetate (8:2), (7:3), (6:4), (5:5) toluene: ethyl acetate (6:4), chloroform: methanol (7:3). Phytochemical screening result indicated the presence of glycosides, triterpenoids/steroids, flavonoids, tannins and anthraquinon. Both of 80% ethanol extract and fractions of red betel leaf (Piper betle Linn.) have antimicrobial activity with Minimum Inhibitory Concentration (MIC) of ethanol extract 80% against Staphylococcus aureus, Escherichia coli and Candida albicans are 2.5%, 2.5%, 10%. The n-hexane fractions were 20%, 15%, 10% and the ethyl acetate fractions are 2.5%, 1%, 2.5%, while the water fraction did not show any antimicrobial effects. The ethanol extract indicated a higher inhibitory effect in Escherichia coli, while the ethyl acetate fraction showed a higher effect on Staphylococcus aureus and Candida albicans. The TLC results showed the presence of terpenoids/steroids, flavonoids, and tannins in ethanol extract, tannin and flavonoid in ethyl acetate, terpenoid/steroids in n-hexane fraction.
Isolation and Characterization of Gene Encoded Tonoplast Intrinsic Proteins from Halophyte Plant Salicornia herbacea Netty Ermawati
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Salicornia herbacea is a succulent halophyte plant which grows optimally under 300 mM NaCl. These plants may have acquired specific genes that are essential for tolerating salt. To obtain insight into the comprehensive molecular characteristics related to the salt tolerance mechanism, we performed a screening of salt-inducible genes in S. herbacea shoots by differential display. A comparative analysis of gene expression between control and salt-stressed conditions led to the detection of 6 cDNA clones induced by salt. Sequence analysis and database searching revealed that all of the clones have homology with tonoplast intrinsic proteins. We designated them as ShTIP1 to ShTIP6 (S. herbacea Tonoplast Intrinsic Proteins). One the identified genes, ShTIP6 showed higher induced under salt stress compared to other ShTIP genes. In this study, we characterized the expression of ShTIP6 in different organs and stresses.
On The Graphs and Their Complements with Prescribed Circumference TA Kusmayadi; L Caccetta
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Let Gt(n) be the class of connected graphs on n vertices having the longest cycle of length t and let G ∈ Gt(n). Woodall (1976) determined the maximum number of edges of G. An alternative proof and characterization of the extremal (edge-maximal) graphs given by Caccetta & Vijayan (1991). The edge-maximal graphs have the property that their complements are either disconnected or have a cycle going through each vertex (i.e. they are hamiltonian). This motivates us to investigate connected graphs with prescribed circumference (length of the longest cycle) having connected complements with cycles . More specifically, we focus our investigations on the class G (n, c, c) denoting the class of connected graphs on n vertices having circumference c and whose connected complements have circumference c. The problem of interest is that of determining the bounds of the number of edges of a graph G∈ G(n, c, c) and characterize the extremal graphs of G(n, c, c). We discuss the class G (n, c, c) and present some results for small c. In particular for c=4 and c =n-2, we provide a complete solution.
X-Ray Diffraction and Microstructure of Tin Dioxide with Addition of Fe Posman Manurung
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Preparation and characterization of tin dioxide, SnO2, had been carried out by precipitation process of SnCl2.2H2O in ammonia and aqua solutions with comparison of 1 : 7. FeCl3 was added to solution with variation of 0, 0,1, 0.2, 0.5 and 1.0 gram respectively and then sintered at 900°C. The X-ray diffraction (XRD) analysis shows that the intensity of diffraction increases with the addition of Fe. The addition of Fe does not cause the new phase. Generally, the Bragg angle is relative same for all samples that means Fe does not change significantly the cell parameters. Scanning electron microscopy (SEM) image shows the microstructure changed with the addition of Fe. On the small addition, the microstructure tends to oval and on the larger addition to plateau.
Recycle Waste Glass for Thermal Insulator Agus Setyo Budi; Sujito Sujito
Jurnal ILMU DASAR Vol 12 No 1 (2011)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

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Abstract

Series of ceramics from recycle waste glass and mica powder have successfully been made and their physical properties of these glasses which include density, bulk modulus, volume expansion and compressive strength have been determined. Comparison of their physical specification to the conventional insulators has also been made. The results show that these ceramics exhibit reasonable mechanical, thermal and physical properties to be a potential thermal insulator. 

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