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Contact Name
Dr. Eng. Sugiarto
Contact Email
journal.aijst@unsyiah.net
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Journal Mail Official
journal.aijst@unsyiah.net
Editorial Address
Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia
Location
Kab. aceh besar,
Aceh
INDONESIA
Aceh International Journal of Science & Technology
ISSN : 20889860     EISSN : 20032348     DOI : -
Core Subject : Engineering,
Aceh International Journal of Science & Technology (AIJST) is devoted to identifying, mapping, understanding, and interpreting new trends and patterns in science & technology development especially within Asian countries as well as other parts of the world. The journal endeavors to highlight science & technology development from different perspectives. The aim is to promote a broader dissemination of the results of scholarly endeavors into a broader subject of knowledge and practices and to establish an effective means of communication among academic and research institutions, policy makers, government agencies and persons concerned with the complex issue of science & technology development. The Journal is a peer-reviewed journal. The acceptance decision is made based upon an independent review process supported by rigorous processes, provides constructive and prompt evaluations of submitted manuscripts, ensuring that only intellectual and scholarly work of the greatest contribution and highest significance is published.
Arjuna Subject : -
Articles 133 Documents
A Preliminary Study on Rainfall Interception Loss and Water Yield Analysis on Arabica Coffee Plants in Central Aceh Regency, Indonesia Yulianur BC, Alfiansyah; Rizalihadi, Maimun; Benara, Reza
Aceh International Journal of Science and Technology Vol 1, No 3: December 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (258.257 KB) | DOI: 10.13170/aijst.1.3.137

Abstract

Abstract - Rainfall interception loss from plants or trees can reduce a net rainfall as source of water yield. The amount of rainfall interception loss depends on kinds of plants and hydro-meteorological characteristics. Therefore, it is important to study rainfall interception loss such as from Arabica Coffee plantation which is as main agricultural commodity for Central Aceh Regency. In this study, rainfall interception loss from Arabica Coffee plants was studied in Kebet Village of Central Aceh Regency, Indonesia from January 20 to March 9, 2011. Arabica coffee plants used in this study was 15 years old, height of 1.5 m and canopy of 4.567 m2. Rainfall interception loss was determined based on water balance approach of daily rainfall, throughfall, and stemflow data. Empirical regression equation between rainfall interception loss and rainfall were adopted as a model to estimate rainfall interception loss from Arabica Coffee plantation, which the coefficient of correlation, r is 0.98. In water yield analysis, this formula was applied and founded that Arabica Coffee plants intercept 76% of annual rainfall or it leaved over annual net rainfall 24% of annual rainfall. Using this net rainfall, water yield produced from Paya Bener River which is the catchment area covered by Arabica Coffee plantation was analyzed in a planning of water supply project for water needs domestic of 3 sub-districts in Central Aceh Regency. Based on increasing population until year of 2025, the results showed that the water yield will be not enough from year of 2015. However, if the catchment area is covered by forest, the water yield is still enough until year of 2025
Linear Subspaces of Solutions Applied to Hirota Bilinear Equations Adamu, M. Y.; Suleiman, E.
Aceh International Journal of Science and Technology Vol 1, No 2: August 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (424.454 KB) | DOI: 10.13170/aijst.1.2.125

Abstract

Abstract - Linear subspace of solution is applied to Boussinesq and Kadomtseve-Petviashvili (KP) equations using Hirota bilinear transformation. A sufficient and necessary condition for the existence of linear subspaces of exponential travelling wave solutions to Hirota bilinear equations is applied to show that multivariate polynomials whose zeros form a vector space can generate the desire Hirota bilinear equations with given linear subspaces of solutions and formulate such multivariate polynomials by using multivariate polynomials which have one and only one zero.Keywords: Hirota bilinear form, solton solution, N-wave solution, linear subspaces.
On the Oscillation of the Generalized Food-Limited Equations with Delay M. Abdulhamid, Bala; Haruna, Yusuf; M. Muhammad, Bamaina
Aceh International Journal of Science and Technology Vol 1, No 3: December 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (431.385 KB) | DOI: 10.13170/aijst.1.3.132

Abstract

Abstract - The objective of the paper is to find conditions for the oscillation of the food-limited equation. We established conditions for the oscillation of all solutions of the generalized foodlimited equation by transforming the equation to a non-linear delay differential equation and then to a scalar delay differential equation and using the property of the scalar delay differential equation to obtain our result. Similarly we establish conditions for the oscillation of all solutions of the foodlimited equation with several delays by transforming the equation to a scalar differential equation to obtain the oscillatory property.
Grey Model for Stream Flow Prediction B, Vishnu; P, Syamala
Aceh International Journal of Science and Technology Vol 1, No 1: April 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1833.037 KB) | DOI: 10.13170/aijst.1.1.9

Abstract

Abstract – Design, operation and planning of water resources, irrigation and water supply systems require estimation of stream flow. A grey system or stochastic approach is required for dealing with the hydrological complexities of mid and long-term stream flow prediction. Generally relatively long period data series of stream flow records is required for the prediction using stochastic methods. In developing countries like India, availability of long period hydrological records is a problem. Grey system theory is applicable in the case of unclear inner relationship, uncertain mechanisms and insufficient information and requires only small samples for parameter estimation. Stream flow records of Bharathapuzha river basin, Kerala, India is subjected to grey analysis. Model parameters were estimated using leastsquares method. Statistical indices for the developed models indicate their ability to predict stream flow in the river under study with reasonable accuracy.
SiRNA Mediated Gene Silencing: A Mini Review Joseph, Baby; S.U, Ajisha; M.V, Jeevitha
Aceh International Journal of Science and Technology Vol 1, No 3: December 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (249.727 KB) | DOI: 10.13170/aijst.1.3.140

Abstract

Abstract - RNA interference (RNAi) technology has become a novel tool for silencing gene expression in cells or organisms. RNA interference is the process that double-stranded RNA induces the homology-dependent degradation of cognate mRNA mediated by 21-23 nucleotide short interfering RNA (siRNA). RNA interference is a powerful mechanism of gene silencing that underlies many aspects of eukaryotic biology. On the molecular level, RNAi is mediated by a family of ribonucleoprotein (RNP) complexes called RNA-Induced Silencing Complexes (RISCs), which can be programmed to target virtually any nucleic acid sequence for silencing. The ability of RISC to locate target RNAs been co-opted by evolution many times to generate a broad spectrum of gene silencing pathways. The study about the Silencing of gene expression by siRNA is rapidly becoming a powerful tool for genetic analysis and represents a potential strategy for therapeutic product development. In this study, the applications of siRNA expressing recombinant adenovirus system in plants, animals and in cancer gene therapy are given importance with its modifications
The Hardness of Boride Layer on the S45C Iron (A preliminary study on surface hardening of ferrous material) S, Sutrisno; Soegijono, Bambang
Aceh International Journal of Science and Technology Vol 1, No 2: August 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (515.574 KB) | DOI: 10.13170/aijst.1.2.126

Abstract

Abstract - The property such as microhardness of boridelayer formed on S45C iron was investigated. Boronizing was carried out in a solid medium consisting of nano size powders of 50% B4C as a donor, 45% SiC as a diluent, and 5% KBF4 as an activator treated at the temperature of 10000C for 8 hours. The phases that were formed on the substrate was found as Fe2B and FeB layer that had smooth and flate shape morphology. The hardness of boride layer on S45C was over 2000 HV, while the hardness of untreated S45C iron was about 196,39 HV. Depending on process time and temperature, the depth of boride layer ranges from 25 to 55 μm, leading to a diffusion controlled process.Keywords : Boronization, hard layer, heat treatment, B4C.KBF4.SiC powder, low carbon steel.
A Review on Viscometer Devices for Gas Phase Yusibani, Elin
Aceh International Journal of Science and Technology Vol 1, No 3: December 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (679.696 KB) | DOI: 10.13170/aijst.1.3.133

Abstract

Abstract -Viscosity, one of the transport properties, is a basic property required for developing any device in which fluid flows. In the present paper, major gas viscometers devices are reviewed. The review is covering to the pressures and the temperatures ranges, methods and accuracy of the instruments, and the coefficient of viscosity-range of the sample. This study is expected become useful information for any researcher who wants to develop a gas viscometer apparatus in a near future. By identifying the coefficient of viscosity-range and the  easurement-range of temperatures and pressures, then we can choose the effective and efficient method to be developed.
A Study on Learning Pre-Algebra Using Interactive Multimedia Courseware Within Collaborative Learning Set-Up and E-Mail Interactions Khalid, Mohd Sazali; Yamin, Sulaiman; Sari, Sri Adelila
Aceh International Journal of Science and Technology Vol 1, No 1: April 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (224.92 KB) | DOI: 10.13170/aijst.1.1.10

Abstract

Abstract – Many students at diploma level are weak in mathematics even after spending eleven years in Malaysian education system. However, throughout the world there are research studies been done with mixed results using technology and collaborative learning. The objective of this paper is to analyze the effect of learning pre-algebra using interactive courseware with collaborative learning by using STAD set ups with interactive courseware using e-mail facilities during team discussion only. Quasi experimental type research was used. The gain score (differences between post and pre test) between the two equivalent groups were obtained. Diploma Information Technology first year students in two different intake years 2009 and 2010 in UTHM were employed. ‘t-test’ results revealed the second group using e-mail is statistically significantly inferior to the group using purely interactive multimedia courseware CDiCL only with STAD team discussion. On average participants experienced higher gain scores in the first group (Mean = 3.28, SE=0.433), than participants in the second group (M=0.77, SE=0.354). This difference was statistically significant (t (74) = 4.51, p
Some Practical Guidelines for Effective Sample-Size Determination in Observational Studies Wan Ahmad, Wan Muhamad Amir; Wan Mohd Amin, Wan Abdul Aziz; Azlida Aleng, Nor; Mohamed, Norizan
Aceh International Journal of Science and Technology Vol 1, No 2: August 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (110.589 KB) | DOI: 10.13170/aijst.1.2.127

Abstract

Abstract- The purpose of this present study was to determine the right sample size in observational study which is focusing on medical or health sciences field. Sample size calculation is actually depends on the type of how the study is designed. For example different formulas are used to calculate the sample size in different type of the study. In this article, the formula of single proportion and two proportions is discussed and an example from medical research, which may contribute to the understanding of this problem, is presented.
Potential Biomass Evaluation on Forest Plant Stands In Aceh Province, Indonesia: A Case Study of Forest Product Utilization Permit for Cultivated Forest Area by PT. Acehnusa Indrapuri Basri, Hairul; D, Dahlan; Nurochman, Deden
Aceh International Journal of Science and Technology Vol 1, No 3: December 2012
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (249.535 KB) | DOI: 10.13170/aijst.1.3.135

Abstract

Abstract – Development of industrial forest plantation currently has a primary function to produce timber for the fulfillment of the pulp and paper industry raw matter. In times of growing trees plantations have the ability to absorb carbon dioxide gases (CO2) in the atmosphere throught the process of photosynthesis which builds biomass stands and produce oxygen gases (O2). The potency of forest stands biomass and build a model standing stock biomass using the Normalized Difference Vegetation Index (NDVI) value from Satellite Imagery was investigated. Types of crops grown in Forest Product Utilization Permit for Cultivated Forest Area in PT.Acehnusa Indrapuri are A.mangium and E.urophylla plantations with area approximately 15,500.59 ha. The results showed the biomass content at the lowest value 16.81 tons per hectare with the NDVI Value of 0.342 whereas the highest content of biomass amounted to 145.750 tons per hectare in NDVI value 0.813. The content of plant biomass of forest stands can be expected by NDVI values using the model equation Y = 250.32 X 2 -15.221X- 3.3623 with R2 of 97.27%

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