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Aceh International Journal of Science & Technology
Published by Universitas Syiah Kuala
ISSN : 20889860     EISSN : 25032348     DOI : https://doi.org/10.13170/aijst
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Transportation
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 : Ilmu Lingkungan (semua ketegori) - Global dan Perubahan Planet
Articles 147 Documents
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USING LANDSAT-8 IMAGERY DATA ON MAPPING OF THE SEAGRASS DISTRIBUTION IN MATAHARI ISLAND, PULAU BANYAK DISTRICT, ACEH PROVINCE, INDONESIA Purnawan, Syahrul; Aulia, Fauzan; Khairuman, Teuku
Aceh International Journal of Science and Technology Vol 5, No 2 (2016): August 2016
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.5.2.4928

Abstract

The objective of the present study was to gathers information about the seagrass distribution area using the remote sensing that retrieved from Landsat-8. Analysis of Landsat-8 image is classified into 6 classes; seagrass, coral reefs, sand, sea, and cloud. The agreement between processed image of seagrass bed and ground truth reference was 70%. The seagrass ecosystem is well distributed along the Matahari Island, with the total area approximately 44.0123 Ha.
APPLICATION OF VERTICAL ELECTRICAL SOUNDING (VES) FOR SUBSURFACE PROFILING IN WEH ISLAND, ACEH PROVINCE Marwan, Marwan; Rifqan, Rifqan; Syafrizal, Idris; Muhammad, Yanis
Aceh International Journal of Science and Technology Vol 8, No 1 (2019): April 2019
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.8.1.12879

Abstract

Groundwater availability is the main concern in a developing region such as Weh Island, Aceh. To locate groundwater resources, vertical electrical sounding (VES) was used to identify subsurface profiles. The study area is located on a volcanic island. The lithology consists of volcanic rocks as andesite lava and pyroclastic rocks as lapily-tuff until breccia. VES method was carried out in 4 measurement points using the Schlumberger array. The resistivity value used to identify subsurface lithology. The top layer of alluvium and weathered lava have resistivity ranges from 14.3 ?m to 17.7 ?m with thickness varies from 0 m ? 17.4 m. It is followed by andesite resistivity ranges from 17.3 ?m to 18.2 ?m with averages thickness is 17.4 m ? 35.2 m. Finally, the bottom layer is filled by breccia-tuff with resistivity value from 5.5 ?m to 7.3 ?m. The physical properties of some related rocks allow water accumulation to their bodies. The current polarization indicates water content in the pore space of breecia at the study area which polarization point is identified as the water table.
SEROLOGICAL SURVEY OF DENGUE VIRUS IMMUNOGLOBULIN M AMONG FEBRILE PATIENTS IN KADUNA METROPOLIS, NIGERIA Idoko, Matthew O.; Ado, Saleh A.; Umoh, Veronica J.
Aceh International Journal of Science and Technology Vol 3, No 3: December 2014
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.3.3.1997

Abstract

The purposes of this research were to determine the prevalence of dengue virus in the study population, to determine the relationship between the occurrence of dengue virus IgM and potential risk factors and to determine the association between the occurrence of dengue virus and some symptoms. In this study, blood specimen were collected from 340 subjects with febrile complaints attending hospitals in Kaduna metropolis, Nigeria and who gave their consent to participate. Serological determination of dengue virus IgM was carried out using enzyme linked immunosorbent assay technique. Structured questionnaires were also administered to obtain data on demographic, risk factors,  and symptoms of illness. A total of 6 subjects were positive for dengue virus IgM giving a prevalence of 1.8%. There was no statistically significant association between the occurrence of dengue virus IgM and potential risk factors, demographic factors and symptoms of the illness. The occurrence of dengue virus in the study population was confirmed.
RESIDUAL RADIOISOTOPES GENERATED FROM NEUTRON IRRADIATED ALUMINUM CAPSULES Kambali, Imam; Saptiama, Indra; Suryanto, Hari
Aceh International Journal of Science and Technology Vol 6, No 3 (2017): December 2017
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.6.3.8116

Abstract

Aluminum (Al) is often used to house a molybdenum oxide (MoO3) target for neutron or proton-produced technetium-99m (99mTc) radioisotope. During neutron or proton bombardment of an Al body, residual radioisotopes could be generated following nuclear reactions between the incoming particles and the Al body. In this research, residual radioisotopes produced following nuclear reactor based-neutron irradiation of Al body were experimentally measured using a portable gamma ray spectroscopy system; whereas TALYS 2015 calculated data were used to evaluate various nuclear reactions for the by-product identification. As a comparison, Al body used in a cyclotron-based 99mTc production was also analyzed. Experimental data indicated that relatively long-lived radioisotopes such as 26Al, 22Na and 24Na were identified in the Al body following nuclear reactor-based 99mTc production, whereas the presence of 27Mg radioisotope was, for the first time, experimentally detected in both the Al bodies for nuclear reactor-based and cyclotron-based 99mTc production. A special safety attention should be paid to the radiation workers when producing 99mTc using a nuclear reactor since it generates 26Al (half life = 716,600 years).
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 | Download Original | Original Source | Check in Google Scholar | 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
ANALYSIS OF PARAMETER ROASTING ON COLOR AND PEANUTS ROASTED TASTE Yanti, Silvi Ari; Soekardi, Chandrasa; Lubis, M. Sobron Yamin
Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.7.2.8964

Abstract

The purpose of this study is to determine the optimum temperature of roasting, optimal rotation speed of tube and roasting time, to produce roasted peanuts with good taste and good colour. The research method is experimental using a Completely Randomized Design (CRD) with three factors of temperature, rotation and time. And analyzed using Anova method and Multiple Linear Regression. Temperature consists of five variables, namely 80oC, 85oC, 90oC, 95oC and 100oC. For rotations speed consists of 30, 35, 40 and 45 RPM. Variable of roasting time consists of four roasting times of 10, 15, 20 and 25 minutes. The numbers of data were 80 experiments. With three observation parameters namely moisture containing, color and aroma. It can be concluded that the temperature 95oC is the optimal roasting temperature; the optimal rotation speed is 40 RPM and 25 minutes for each roasting time. With the variable values mentioned, roasted bean products contain a fairly good taste, good moisture and good colour.
ISOLATION AND IDENTIFICATION OF AIR BORNE FUNGAL SPORES AND FRAGMENTS IN BUILDINGS WITHIN USMANU DANFODIYO UNIVERSITY SOKOTO, NIGERIA Sa?adatu Aliyu, Shinkafi; Gambo, Aliyu
Aceh International Journal of Science and Technology Vol 3, No 2: August 2014
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.3.2.1390

Abstract

 Abstract - Indoor air contains a complex mixture of microorganisms, microorganism fragments, and by products such as molds, bacteria, endotoxins, mycotoxins, and volatile microbial organic compounds. Airborne fungi and bacteria can be toxic, allergenic and/or infectious. A research was conducted to determine the number and types of airborne fungal spores in Buildings of Usmanu Danfodiyo University Sokoto, Nigeria. Five (5) areas were chosen within the University for the Survey, these were student Hostel, Staff Quarters, Botanical garden, Microbiology laboratory and city campus of Usmanu Danfodiyo University. . A total number of fifteen (15) petri dishes containing potato dextrose agar each were vertically placed in each sampler and exposed at end of each height and site for 10 and 20 minutes respectively.  A total of thirteen (13) different fungal specie were identified namely; Aspergillus niger, A. flavus, A fumigates, A. ustus, A. terreus, Fusarium solani, F. oxysporum, Alterneria altenata, Rhizopus oryzae,  R. stolonifer, Helminthosporum sp., Penicillum candidum and Absedia corymbifera. Aspergillus niger had the highest frequency of occurrence of (14.9%), Helminthosporus species had the least frequency of occurrence of (1.5%). Conclusively it was observed that the concentration of fungal spores was high in the upper surface than the ground level at the time of the survey.
WASTE TIRE APPLICATION IN CONCRETE STRUCTURES Maryoto, Agus; waluyo, sugeng; haryanto, yanuar; Intang Setyo Hermanto, Nor
Aceh International Journal of Science and Technology Vol 6, No 1 (2017): April 2017
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.6.1.5279

Abstract

The waste tire is produced more than 10 million tons every year in the world. This problem needs serious treatment to eliminate the waste tires. This work is aimed to recycle the waste tire in concrete as a reinforcement. The contribution of the waste tires in flexural strength capacity of concrete is investigated by using experimental work and numerical simulation. Since material is quite non-homogenous compared to the pure concrete, we use six concrete beam specimens with dimension 150 mm x 150 mm x 1000 mm to get better fitting results. One specimen is non reinforced concrete beam and five specimens are waste tires reinforced concrete beam. For each of the five specimen, the waste tire reinforcement is tensioned with 0%, 17%, 25%, 40% and 60% strain before casting the concrete. The flexural strength tests are conducted after 28 days concrete ages under three point loadings. After the test, we observe that the waste tire reinforcement together with pre-stress contribute significantly on the flexural strength of the concrete beam as predicted. Finally, to support the test, finite element analysis is performed as well in this work and compared with the experimental results.
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 | Download Original | Original Source | Check in Google Scholar | 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 ?m, leading to a diffusion controlled process.Keywords : Boronization, hard layer, heat treatment, B4C.KBF4.SiC powder, low carbon steel.
STOCHASTIC PRODUCTION FRONTIER MODELS TO EXPLORE CONSTRAINTS ON HOUSEHOLD TRAVEL EXPENDITURES CONSIDERING HOUSEHOLD INCOME CLASSES Saleh, Sofyan M.; Sugiarto, Sugiarto
Aceh International Journal of Science and Technology Vol 5, No 1 (2016): April 2016
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.5.1.3839

Abstract

This paper explores the variation of household travel expenditure frontiers (HTEFs) prior to CC reform in Jakarta. This study incorporates the variation of household income classes into the modeling of HTEFs and investigates the degree to which various determinants influence levels of HTEF. The HTEF is defined as an unseen maximum (capacity) amount of money that a certain income class is willing to dedicate to their travel. A stochastic production frontier is applied to model and explore upper bound household travel expenditure (HTE). Using a comprehensive household travel survey (HTS) in Jakarta in 2004, the observed HTE spending in a month is treated as an exogenous variable. The estimation results obtained using three proposed models, for low, medium and high income classes, show that HTEFs are significantly associated with life stage structure attributes, socio-demographics and life environment factors such as professional activity engagements, which is disclosed to be varied across income classes. Finding further reveals that considerable differences in average of HTEFs across models. This finding calls for the formulation of policies that consider the needs to be addressed for low and medium income groups in order to promote more equity policy thereby leading to more acceptable CC reform.

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