Aceh International Journal of Science and Technlogy
Aceh International Journal of Science and Technology Aceh International Journal of Science and Technology Aceh International Journal of Science and Technology (AIJST) is accredited by Kemenristek Dikti, Republic of Indonesia, No. 36b/E/KPT/2016 started from 31 May 2016 to 31 May 2021. Aceh International Journal of Science & Technology (AIJST) is published by Graduate School of Syiah Kuala University (PPs Unsyiah) and Indonesian Soil Science Association (Himpunan Ilmu Tanah Indonesia, Komda Aceh). It 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. Scopes Starting from 2016 AIJST focuses on science and engineering aspects, and therefore now AIJST consideres the topics but not limited to : Engineering (Mechanical, Chemical, Civil, Architecture, Transportation) Geology and Geomorphology Environmental Science (Hydrology, Pollution, Water Treatment, Soil Science, Climatology) Physical Oceanography Mathematics Physics and Geophysics Information Technology All manuscripts should follow the instruction for author strictly and proof-read by native or professional speakers and be submitted through online submission at: www.jurnal.unsyiah.ac.id/aijst/login
Articles
156 Documents
<![CDATA[Effectiveness of the Vietnamese Good Agricultural Practice (VietGAP) on plant growth and quality of Choy Sum (Brassica rapa var. Parachinensis) in Northern Vietnam ]]>
<![CDATA[Ha, Tuan M.]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 3, No 3: December 2014 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.3.3.2023
<![CDATA[In response to the recent concerns about human health, ecosystem sustainability and thus demands for food safety, production of clean produce, particularly daily-consumed vegetables, is essential. The study was carried out in Thai Nguyen city (northern Vietnam) during August – November 2011 to evaluate impacts of a VietGAP guideline on plant growth and quality of Choy Sum, one of the major vegetables in the research area. The experiment comprised two treatments, a control (local farmers’ conventional practice) and an experimental treatment (plants grown according to the VietGAP guideline). Plant samples of the latter treatment were collected for quality test at the end of the experiment. Results showed that the experimental plants had significant higher growth parameters with regards to leaf areas (7.13 dm2) and average top plant weight (3.33 kg m-2), while those of the control treatment were 5.80 dm2 and 2.77 kg m-2, respectively. Lab test results showed the experimental plant samples met the national quality standards to be certified as a clean product. The participatory on-field experiment would facilitate critical reflections, transformative learning and readiness for adoption of eco-friendly production practices by the local farmers]]>
<![CDATA[Luwak Coffee Classification Using UV-Vis Spectroscopy Data: Comparison of Linear Discriminant Analysis and Support Vector Machine Methods ]]>
<![CDATA[Suhandy, Diding]]>;
<![CDATA[Yulia, Meinilwita]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.7.2.8972
<![CDATA[UV-Vis spectroscopy has been used as a promising method for coffee quality evaluation including in authentication of several high-economic coffee types. In this paper, we have compared the abilities of linear discriminant analysis (LDA) and support vector machines classification (SVMC) methods for Luwak coffee classification. UV-Vis spectral data of 50 samples of pure Luwak coffee and 50 samples of pure non-Luwak coffee were acquired using a UV-Vis spectrometer in transmittance mode. The results show that UV-Vis spectroscopy combined with LDA and SVMC was an effective method to classify Luwak and non-Luwak coffee samples. The classification result was acceptable and yielded 100% classification accuracy for both LDA and SVMC methods. However, due to the simplicity and volume of the required calculation, in this present study LDA method is superior to SVMC method.]]>
<![CDATA[Water and Sediment Quality Index Due To Gold Mining in The Krueng Kluet Hilir Watershed, Aceh Selatan Regency ]]>
<![CDATA[Ramli, Ichwana]]>;
<![CDATA[., Syahrul]]>;
<![CDATA[Lestari, Mutia Rizka]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 9, No 1 (2020): April 2020 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.9.1.15267
<![CDATA[Increasing population growth, economic and industrial development will lead to the utilization of natural resources effected on water pollution. One of those activities related to natural resource utilization is gold mining. Mining activities cannot be separated from the use of chemicals that are harmful to living things; for example, it is mercury. This study aims to determine levels of mercury (Hg) that accumulate in water and sediments. The tools used in this research are QGIS 2.18.27 software and Global Positioning System. The material used is water and sediment samples. Water and sediment samples were analyzed at the Industrial Standardization Research Institute Laboratory to obtain several potential parameters such as hydrogen (pH), mercury (Hg), Lead (Pb), Iron (Fe), and Copper (Cu). These potential parameters are further analyzed using the Pollution Index (PI) method and Sediment Quality Guidelines (SQGs). The results demonstrated that the water quality in downstream of Krueng Kluet sub-watershed in for 2019 using the Pollution Index (PI) method for the drinking water (Class I) with the value is 6.2036. It is classified as moderately polluted water quality criteria and for the agricultural water (Class IV) with the value is 6.0796, classified as moderately polluted water quality criteria. The quality of sediments in the downstream of Krueng Kluet sub-watershed using the sediment quality guidelines method with the value is 0.2343 is classified as an adverse effect for the biota of heavy metals on medium value. This shows that neither the water quality nor the sediment in the downstream of Krueng Kluet sub-watershed does not accord with the water and sediment quality standards. Pollution Index can assess the quality of water bodies and becomes a consideration in taking actions to improve water quality. At the same time, SQGs show chemical concentrations that have biological effects on aquatic biodata.]]>
<![CDATA[Adaptive Thermal Comfort in The Tropic: A Case Study of The Aceh Tsunami Museum ]]>
<![CDATA[Hilma Sari, Laina]]>;
<![CDATA[., Zulfian]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 2, No 3: December 2013 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.2.3.1008
<![CDATA[Abstract - Thermal comfort calculated using ISO 7730 has been questioned and responded by more adaptive thermal comfort methods. This study was therefore conducted to assess the acceptable thermal comfort for the local people in the tropical Aceh using the measurement based on ISO 7730 and with adaptive thermal comfort method by questionnaires. In this research, Aceh Tsunami Museum building, located in Banda Aceh, Indonesia, was in an open designed layout to be assessed as a case study. This study was conducted onsite using mechanical equipment and involving 138 respondents. The result shows that the comfort temperature calculated by mechanical equipment based on ISO 7730 is 23.140C. This is in contrast with the result of the questionnaires that showed people in an open building design rate the air temperature up to 320C as slightly cool. This condition is influenced by the mean air speed of 2.34 m/s and the mean relative humidity of 66.25%. This finding agrees that obtaining the comfort air temperature especially in tropics merely from the prediction of comfort index in ISO 7730 is inaccurate since the respondents actually could adapt with the higher air temperature. Keywords: Adaptive thermal comfort; Tropics; Aceh Tsunami Museum]]>
<![CDATA[Woodcutting Activities in Tabuk Region (Saudi Arabia): Assessment of Conservation Knowledge ]]>
<![CDATA[Al-Mutairi, Khalid A.]]>;
<![CDATA[Al-Atawi, Adnan]]>;
<![CDATA[Alajlan, Abdulmajeed]]>;
<![CDATA[Al-Shami, Salman A.]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 4, No 2 (2015): August 2015 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.4.2.2489
<![CDATA[The present study aims to investigate the effect of different social factors on the woodcutting frequency in Tabuk Region. A total of 100 people participated in this study by answering the questionnaire questions. The conservation knowledge of the participants was also assessed through 4 questions (Yes or No). The final score of the conservation knowledge assessment is 4. The present study findings showed that most of people like to cut the wood for heating during winter and fall seasons. The frequency of woodcutting in Tabuk Region was once a month. Among the social factors involved in this study, education showed negative and significant relationship with the number of logging times. However, age had positive relationship with the number of logging times. The most favourbale species to be cut and used for heating and cooking in Tabuk are; Acacia tortilis, Acacia ehrenbergiana, Retama reaetam and Calligonum comosum. For the assessment of the public conservation knowledge, it was found that most of participants had moderate to good conservation knowledge as most of them answered 3 questions correctly out of 4. The conservation knowledge showed to be affected positively by education level and negatively by the number of family members. In conclusion, it was found that there is remarkable woodcutting stress on wild plants in Tabuk Region and immediate and effective actions should be performed]]>
<![CDATA[Modeling Hydrologic Response to Land Use and Climate Change in the Krueng Jreu Sub Watershed of Aceh Besar ]]>
<![CDATA[Ferijal, Teuku]]>;
<![CDATA[Bachtiar, Mustafril]]>;
<![CDATA[Jayanti, Dewi Sri]]>;
<![CDATA[Jafaruddin, Dahlan]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 5, No 3 (2016): December 2016 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.5.3.5762
<![CDATA[Soil and Water Assessment Tool (SWAT) model was used to simulate impact of landuse and climate change on water resources in Krueng Jreu subwatershed located in Aceh Province – Indonesia. The subwatershed is a primary source of water to irrigated 233.52 km2 paddy field area through a surface irrigation system. The model performance was considerably good in predicting streamflow. The coefficients of determination varied between 0.58 and 0.72, while the Nash-Sutcliffe coefficients (ENS) ranged between 0.65-0.72 and the percentage bias were in the range of -0.36 to 2.30. Scenarios were applied to the best fit model to evaluate watershed responses to land use and climate changes. The model predicted increases in both runoff and water yield by 1% and 0.1% respectively as the result of increasing 15% settlement area. When all agricultural land within subwatershed converted to forest, water yield would increase by 1% during dry period and runoff contribution would decrease by 5%. Increases in surface flow by 23.6% and water yield by 15.1% were found under scenario of increasing 10% of daily precipitation. Increasing in evapotranspiration caused by an increase of 1.5â°C in daily air temperature would decrease surface flow and water yield by 0.8% and 1.3%, respectively. Combination scenarios of changes in daily temperature and precipitation would increase evapotranspiration rate, annual water yield and runoff contribution.]]>
<![CDATA[Role of Age Hardening Heat Treatment on the Hardness Values of 93.95 Al-5 Zn-1.05 Sn/5 Al2o3- Sio2 Particulate Composite ]]>
<![CDATA[P. Ihom, Aondona]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 3, No 2: August 2014 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.3.2.1389
<![CDATA[Abstract - The effect of age hardening heat treatment on the hardness values of 93.95Al-5Zn-1.05Sn/5Al2O3-SiO2 particulate composite has been studied. The data used for the work was generated at the National Metallurgical Development Centre, Jos Foundry shop, where the composite was developed. The composite was developed using the stir cast method. The result of the work has shown that the composite has a response to age hardening heat treatment with the optimum hardness value occurring at 2 hours of age hardening. A model was developed for the relationship between age hardening time and hardness of the composite. It was tested, and the product moment of correlation and the coefficient of correlation values attested to the degree of correlation existing between the two variables.]]>
<![CDATA[PM3 and DFT Computational Studies of the Reaction Mechanism of Formaldehyde and Isoleucine ]]>
<![CDATA[Hamza, Umar]]>;
<![CDATA[Uzairu, Adamu]]>;
<![CDATA[Sallau, Muhammad S.]]>;
<![CDATA[Abechi, Stephen E.]]>;
<![CDATA[Shallangwa, Gideon A.]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 5, No 1 (2016): April 2016 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.5.1.3838
<![CDATA[The reaction of formaldehyde and Isoleucine was studied using semi-empirical and density functional theory methods. Possible reactive sites are proposed and reaction mechanism postulated. It was found that the Isoleucine nitrogen attacks the carbonyl carbon of formaldehyde and forms a methylol intermediate that undergoes a condensation with another Isoleucine to produce a Methylenediisoleucine through a methylene bridge (cross-linking). The enthalpies of the reaction are -78.79 kJ/mol and -39.14kJ/mol for PM3 and DFT respectively also ΔSo and ΔGo, for the PM3 and DFT studies predicted. The reaction was found to be exothermic and second order.]]>
<![CDATA[Analisis Of Varians And Correlation Study Of Chlorophyll-A In A North And South Coast Of Lombok Island Using Aqua Modis Images Data ]]>
<![CDATA[Wibisana, Hendrata]]>;
<![CDATA[Zainab, Siti]]>;
<![CDATA[Kamandang, Zetta Rasullia]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 9, No 2 (2020): August 2020 in press ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.9.2.16468
<![CDATA[Chlorophyll-a mapping in the coastal environment is widely used as material for fishing fishermen who are more familiar with the terrain. In contrast, one of the parameters required the presence of chlorophyll-a in phytoplankton is much investigated regarding its relationship with the existence of fish as a source of livelihood for fishermen capture fisheries. One method that is widely developed is the use of satellite imagery as a medium for the detection of chlorophyll-content on a global scale. This study aims to monitor how much content or distribution of chlorophyll-a is on the north coast and south coast of Lombok island, where topographically, the type of beach in the two coastal regions is not much different as well as the livelihoods of the dependent coastal population from capture fisheries. By using the method of analysis of variance and parametric statistical tests with t-distribution, we want to see the correlation between the two types of chlorophyll-a distribution on the coast of the island of Lombok. The results obtained from this study the distribution of chlorophyll-a concentrations on the north coast and the south side of the coast are not the same, the south coast of Lombok island has smaller variances in the sense that the concentration distribution is relatively the same, different from the north where distribution does not show diversity, this is indicated by a fairly wide interval wherein some coordinates it has a relatively diffuse chlorophyll-a concentration with a fairly high distribution level. The conclusions of this study indicate that from the analysis of variance, bot,h the north and south coasts have different fertility levels, which, are characterized by the growth rate of chlorophyll-a on the surface of the coast.]]>
<![CDATA[Liquefaction Assessment Using the CPT and Accounting for Soil Ageing ]]>
<![CDATA[Setiawan, Bambang]]>;
<![CDATA[Jaksa, Mark]]>
<![CDATA[ Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018 ]]>
Publisher : <![CDATA[Graduate Program of Syiah Kuala University ]]>
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DOI: 10.13170/aijst.7.3.11544
<![CDATA[Due to its continuous data recording capability, excellent repeatability and accuracy, relatively low cost and simplicity of operation, the cone penetration test (CPT) offers enhanced liquefaction assessment over its predecessor the standard penetration test (SPT). However, soil ageing, which influences the cyclic resistance ratio (CRR), is difficult, if not impossible, to be detected by the CPT due to disturbance during the test. This situation may lead to excessively conservative estimation of CRR values which result in conservative assessment of liquefaction potential. This paper presents and discusses liquefaction assessment using the CPT and methods for accounting for soil ageing. A field study, conducted at Gillman, South Australia, is presented and the study site is assessed for liquefaction potential. This paper also explores the influence of soil ageing on the subsequent liquefaction assessment.]]>
