cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Solikhatun
Contact Email
solikhatun@ugm.ac.id
Phone
+62331334293
Journal Mail Official
jid@unej.ac.id
Editorial Address
Jl. Kalimantan 37 Kampus Tegalboto Jember 68121 Telp. 62 331 334293 Fax. 62 331 330225
Location
Kab. jember,
Jawa timur
INDONESIA
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 415 Documents
 11   12   13   14   15 
Antioxidant Isosantosimol from Garcinia griffithii Stem Bark Elfita Elfita; Supriyatna Supriyatna; Husein H. Bahti; Dachariyanus Dachariyanus
Jurnal ILMU DASAR Vol 9 No 2 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.764 KB)

Abstract

A polyisoprenylated benzophenone, isosantosimol had been isolated from the stem bark of Garcinia griffithii T. Anders. The structure of these compound was determined on the basis of spectroscopic data including UV, IR, 1H NMR, 13C NMR, HMQC, HMBC and COSY, as well as by direct comparison with those of reported data. The antioxidant activity of this compound was observed using radical scavenging 1,1-diphenyl-2-picryl hydrazyl (DPPH) model systems.
Fabrication and Characterization Dye-Sensitized Solar Cell based on TiO2/SnO2 Composit Electrode and Polymer Electrolite Irmansyah Irmansyah; Akhiruddin Maddu; Mahfuddin Zuhri
Jurnal ILMU DASAR Vol 9 No 2 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (385.271 KB)

Abstract

A solid-state dye-sensitized solar cell based on TiO2/SnO2 composite electrode and polyethylene glycol (PEG) based electrolyte has been fabricated. The solar cell was formed in sandwich structure, which two electrodes sandwiching polymer electrolyte containing a redox couple (I-/I3-). One of the electrode was TiO2/SnO2 composite layer on TCO (transparent conducting oxide) coated glass substrate which sensitized with Ruthenium complex dye as electron donor, and the other electrode was a carbon sheet as a counter electrode. Active area of solar cell was 1.5 cm x 1 cmm. The solar cell was tested by irradiation with mercury lamp of 400 Watt with intensity of 30 mW/cm2 at a distance of 30 cm and sunlight with intensity of 36 mW/cm2. The cell tested with mercury lamp result in an open circuit voltage (VOC) of 420 mV, short circuit current (ISC) of 52 μA, maximum power (Pmax) of 10.4 μW, fill factor (FF) of 48% and energy conversion (η) of 0.023 %. On the other hand, the cell tested with sunlight source result in VOC=480 mV, ISC=48μA, Pmax=12.6 μW, FF=55% and η=0.023%.
Detection of The High Resoluiton in The Shallow Fault Reactive by The Geophysics Method, VLF-EM Puguh Hiskiawan
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1720.127 KB)

Abstract

VLF-EM method is one of the geophysics methods used to examine rock structure below earth surface. The fault is an earth rock layering process that is usually filled with mineral or seeped with conductive fluid that cause conductivity changes. This fault influences a change in electromagnetic field parameter. This research applied interval variation measurement, to obtain high resolution conductivity. Karous-Hjelt filtering analysis methods was used to explain the response of VLF-EM method about fracture condition or fault reactive occurred in Renokenongo village, Sidoarjo. The result can identify a fault pattern which indicated a very significant reactive fault.
Tetraoksigenasi Santon dari Kulit Batang Garcinia nigrolineata Tetraoxygenated Xanthone from The Stem Bark of Garcinia nigrolineata Muharni Muharni; Supriyatna Supriyatna; Husein Bahti; Dachrianus Dachrianus
Jurnal ILMU DASAR Vol 10 No 1 (2009)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (191.756 KB)

Abstract

A tetraoxygenated xanthone, 1,7-dihidroxy-3-methoxy-4-(3methylbut-2-enyl),6’,6’ –dimethylpyrano (2’ , 3’ : 5, 6) xanthone had been isolated from the ethyl acetate extract of the stem bark of Garcinia nigrolineata Planch Ex T. Anders. The structure of these compounds were determined on the basis of spectroscopic NMR 1D and 2D.
Estimating of Survival Function of Hepatitis Virus in Jember Mohamad Fatekurohman
Jurnal ILMU DASAR Vol 8 No 2 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.474 KB)

Abstract

Statistical method to analyse data of lifetime is called survival analysis. One problem in survival analysis is estimation of survival function. This function can be estimated by using nonparametric method. One problem in  medical is to study the lifetime of hepatitis virus. In this paper the lifetime of hepatitis viruses (A, B, C) are estimated using Nelson’s method. The results show that the three type of viruses have different lifetime and virus type A has the longest lifetime.
Onyx and Marmer Objects Modeling by Joining and Choosing Parametric 2) 1) Modifications of Bezier Revolution Surfaces Kusno Kusno; Antonius Cahya P; Mahros Darsin
Jurnal ILMU DASAR Vol 8 No 2 (2007)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (396.202 KB)

Abstract

We formulate application of Bezier revolution surfaces for modeling onyx and marmer objects in three steps as the following. Firstly, calculating the parametric representation of Bezier revolution surfaces and its shape modification in some different forms is done. Secondly, we formulate parametric continuity for joining the surfaces. Finally, the application of those formulas for modeling onyx and marmer objects of revolution by using computer are simulated.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1326.445 KB)

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (281.175 KB)

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1455.828 KB)

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.
Solution methods of neutron transport equation in nuclear reactors Mohamad Ali Shafii
Jurnal ILMU DASAR Vol 14 No 2 (2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (530.187 KB) | DOI: 10.19184/jid.v14i2.320

Abstract

A few numerical methods that usually used to solve neutron transport equation in nuclear reactor are SN dan PN method, Monte Carlo, Collision Probability and Methods of Characteristics . First two methods have been developed using diffusion approach, and last three methods suitable are applicated for transport approximation. Those of three methods have important role in the desain of nuclear reactors. In addition to follow the development of advanced reactor designs, the three methods were chosen because they do not use diffusion approach these are more accurate methods, as well as less need considerable computer memory. Of all the existing methods, the CP method has several advantages among the others. Keywords : Neutron transport, SN, PN, CP, MOC, MC

Page 13 of 42 | Total Record : 415

 11   12   13   14   15 

Filter by Year

2007 2025


Reset
Filter By Issues
All Issue Vol. 26 No. 2 (2025) Vol 26 No 1 (2025) Vol 25 No 2 (2024) Vol 25 No 1 (2024) Vol 24 No 2 (2023) Vol 24 No 1 (2023) Vol 23 No 2 (2022) Vol 23 No 1 (2022) Vol 22 No 2 (2021) Vol 22 No 1 (2021) Vol 21 No 2 (2020) Vol 21 No 1 (2020) Vol 20 No 2 (2019) Vol 20 No 1 (2019) Vol 19 No 2 (2018) Vol 19 No 1 (2018) Vol 18 No 2 (2017) Vol 18 No 1 (2017) Vol 17 No 2 (2016) Vol 17 No 1 (2016) Vol 16 No 2 (2015) Vol 16 No 1 (2015) Vol 15 No 2 (2014) Vol 15 No 1 (2014) Vol 14 No 2 (2013) Vol 14 No 1 (2013) Vol 13 No 1 (2012) Vol 12 No 2 (2011) Vol 12 No 1 (2011) Vol 11 No 2 (2010) Vol 11 No 1 (2010) Vol 10 No 2 (2009) Vol 10 No 1 (2009) Vol 9 No 2 (2008) Vol 9 No 1 (2008) Vol 8 No 2 (2007) Vol 8 No 1 (2007) More Issue