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Aceh International Journal of Science and Technology
Published by Universitas Syiah Kuala
ISSN : 20889860     EISSN : 25032348     DOI : http://10.13170/aijst
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences
Aceh International Journal of Science & Technology (AIJST) is published by the Graduate School of Syiah Kuala University (PPs Unsyiah) and the 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 broader dissemination of the results of scholarly endeavors into a broader subject of knowledge and practices and to establish effective communication among academic and research institutions, policymakers, 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 and provides constructive and prompt evaluations of submitted manuscripts, ensuring that only intellectual and scholarly work of the greatest contribution and highest significance is published. The AIJST publishes original conceptual and research papers, review papers, technical reports, case studies, management reports, book reviews, research notes, and commentaries. It will occasionally come out with special issues devoted to important topics concerning science & technology development issues. Scopes Starting in 2016, AIJST has focused on science and engineering aspects, and therefore now AIJST considers the topics but not limited to : Engineering (Mechanical, Chemical, Civil, Transportation) Geology and Geomorphology Environmental Science (Hydrology, Pollution, Water Treatment, Soil Science, Climatology) Physical Oceanography Mathematics Physics and Geophysics Geospatial and Information Technology
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Global dan Perubahan Planet
Articles 354 Documents
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Utilization of Unmanned Aerial Vehicle (UAV) for Topographic Survey Using Ground Control Points (GCP) from Geodetic GNSS Nizamuddin, Nizamuddin; Wirandha, Freddy Sapta; Ardiansyah, Ardiansyah
Aceh International Journal of Science and Technology Vol 12, No 1 (2023): April 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.1.31606

Abstract

Mapping with UAVs is a large-scale mapping strategy or method that can shorten the implementation time compared to conventional survey methods that sometimes cannot represent an area as a whole. Aerial photos recorded by drones generally still have a level of position error of up to several meters, so tie points are needed to improve the accuracy of aerial photos. This research aims to utilize drone camera technology to produce geospatial data, both in the form of raster data from aerial photographs and vector data in the form of land contours showing the height of the land surface in Gampong Cot, Gampong Blang, Krueng Kalee, and Angan in Darussalam District, Gampong Durung and Neuheun in Masjid Raya District, Gampong Labuy and Lam Ujong in Baitussalam District. Aerial photo processing produces highresolution image data of 5 cm/pixel. Ground Control Points (GCPs) are used as tie points to improve the accuracy of aerial imagery. GCP measurements use geodetic GNSS, which has an accuracy of cm to mm. Aerial photos that previously had an error rate of 2-7 meters, after being bound with GCP points, the error rate decreased to below 1 meter. Aerial photographs also show that the land cover in the study area is partly forest. Some areas in the west and north are C excavation mining areas. Based on the contour extraction results, the ground elevation in block 1 (Gampong Durung, Gampong Cot, Gampong Angan, and Gampong Lam Ujong) is 66 to 301 meters, block 2 (Gampong Neuhen) is 50 to 260 meters, and block 3 (Gampong Lam Ujong and Labuy) is 90 to 188 meters.
Adsorptive Removal of Copper (Cu) in Sasirangan Liquid Waste by Utilization of Rice Husk as Activated Carbon Syauqiah, Isna; Nurandini*, Desi; Prihatini, Nopi Stiyati; Jamiyaturrasyidah, Jamiyaturrasyidah
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.26431

Abstract

- The business of sasirangan - the conventional texture of Banjar Tribe - has been one of the superb items of South Kalimantan. Sasirangan creation in the shading system utilizes many synthetic components containing weighty metals, which is and its waste possibly dirties the climate. One weighty metal squanders copper (Cu), poisonous to sea-going living beings and people. The treatment for Sasirangan modern wastewater should be possible by an adsorption cycle that utilizations enacted carbon as an adsorbent. This study intends to decide the capacity of enacted carbon produced using rice husk to adsorb Cu from sasirangan fluid burn by dissecting the impact of contact time and adsorbent dose on the adsorption interaction. The bunch framework led the activity with substance and actual actuation. Synthetic initiation was finished by dousing the enacted carbon of rice husk with HCl answer for 24 hours. Simultaneously, actual enactment was done by consuming a heater at 500C for 2 hours. The adsorption treatment was given on sasirangan burn through examples with varieties in contact time (30, 60, and 120 minutes) and the adsorbent portion (2, 4, and 6 grams). The highest productivity of contained Cu decrease is 72.34% utilizing carbon with initiation. The ideal contact time expected in the adsorption cycle of weighty metal Cu in Sasirangan liquid waste is 120 minutes, with the ideal portion of 4 grams of actuated rice husk carbon adsorbent.
Quantifying the Seismicity Parameters of A New Model of Seismic Source Zone for Aceh and Surrounding Areas Juellyan, Juellyan; Setiawan*, Bambang; Muttaqin, Muttaqin; Saidi, Taufiq
Aceh International Journal of Science and Technology Vol 11, No 3 (2022): December 2022
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.11.3.28360

Abstract

Aceh is justified as one of the Indonesian provinces with a high level of seismicity. This high seismicity certainly has a severe negative impact on various aspects of human life in Aceh and the surrounding areas. Various types of efforts must be carried out to solve and mitigate the problem caused by any earthquake in Aceh and the surrounding areas. One aspect that can be carried out to minimize the hazards of seismic activity is the characterization of the source of the earthquake. This characterization can be used for various purposes for further seismic-related studies, including for studying seismic hazard analysis using the probabilistic seismic hazard analysis (PSHA) method. This research aims to determine the characteristics of the seismic source zones for Aceh and the surrounding areas. Based on the geological setting and seismicity catalog data of Aceh and the surrounding areas, a new model of seismic source zones was developed. This new model proposed that Aceh and the surrounding areas be divided into four zones, namely shallow background seismic source zones (divided into two source zones), two deep background seismic source zones, two megathrust source zones, and one fault zone, namely the Sumatra fault zone. The results of this study suggest that Zone I and Zone II of shallow background seismic source zones have a-values of 2.36 and 4.7, b-values of 0.545, and Mmax of 7.7 and 6.8. Deep background seismic source zone I has an a-value of 4.43 and a b-value of 0.9 with a maximum magnitude of 7 Mw. Meanwhile, deep background seismic source zone II has an a-value of 3.28 and a b-value of 0.755 with a maximum magnitude of 6.1 Mw. Megathrust seismic source zone I has an a-value of 3.53 and a b-value of 0.691 with a Mmax of 7.7 Mw. Meanwhile, the megathrust seismic source zone II has an a-value of 3.81 and a b-value of 0.702 with a Mmax of 7.1 Mw. Sumatra fault seismic source zone has an a-value of 2.88 and a b-value of 0.615 with a Mmax of 6.7 Mw.
Adsorption of Phosphate from Aqueous Solution by Calcination of Silicified Coal: Kinetic and Isotherm Studies Fandana, Lisa; Abdullah, Faisal; Muslim*, Abrar; Suhendrayatna, Suhendrayatna; Meilina, Hesti
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.31967

Abstract

Silicified coal (SC) consisting of SiO2 is a promising raw material for adsorbent. The present study aimed to utilize silicified coal bottom ash (SCBA) adsorbent by calcination of the SC at temperatures of 600, 800, and 1000 oC for 1 hour. The FTIR result showed that the SCBA_600, SCBA_800, and SCBA_1000 had chemical functional groups such as the asymmetric Si-O-Si, the symmetric Si-O-Si and Si-O-Si bond rocking for adsorption of phosphate (PO4 3) with the lowest percentage of transmittance of SCBA-1000. The adsorption test showed that rapid adsorption occurred in the first 10 minutes of contact time, and it did not change significantly for the rest of contact time until reaching an equilibrium time of 30 min. The PO4 3 adsorption efficiency and capacity fluctuated over the initial PO4 3 in solution in the 60.02480.29 mg/L range. The highest PO4 3 adsorption efficiency and capacity were at 480.29 mg/L, 95.49 %, and 45.86 mg/g, respectively, using the SCBA-1000. The adsorption kinetic fitted better to the pseudo-second-order kinetics model (average R2 = 0.999) with the adsorption capacity of 45.454, 45.662, and 45.872 for the SCBA_600, SCBA_800, and SCBA_1000, respectively, and the PO4 3 adsorption rate was 0.0007, 0.0008 and 0.001 g/mg.min, respectively. The adsorption isotherm followed Langmuir model (average R2 = 0.873), with the adsorption capacity being 2.357, 1.198, and 8.196 mg/g, respectively, and the pore volume being 0.0316, 0.0364 and 0.2103 L/mg, respectively.
Evaluation of Land Capability and Land Use Direction in the Krueng Peusangan Hilir Sub-watershed, Bireuen Regency Akbar, Halim; Sarifuddin, Sarifuddin; Puarada, Sakral Hasby
Aceh International Journal of Science and Technology Vol 12, No 1 (2023): April 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.1.31566

Abstract

The destruction of forests in watershed areas has now become a concern of many parties, resulting in floods, landslides, and droughts that continue to increase. Watershed damage is accelerated by increased utilization of natural resources due to population growth and economic development, conflicts of interest, and lack of integration between sectors between the upstream-middle-downstream areas. For this reason, it is necessary to assess land capability in a watershed so that land development follows the land capability class. The research was carried out in the Krueng Peusangan Hilir Sub-watershed, Bireuen Regency, Aceh, Indonesia, from October 2021 to February 2022, which is geographically located at 9558''00 - 9652''00 East Longitude and 506''00- 517 ''00" North Latitude. Land use in the study is dominated by dry land agriculture, covering an area of 19,100.28 ha with a topography area from 0-8% to 25-40%. A survey method by analyzing land capability classes at the study site was carried out for each land map unit (LMU) by comparing land conditions with the land capability evaluation Hockensmith and Steeles criteria (overlaid of determined thematic maps). The result shows that soil erodibility decreased linearly with increasing organic matter in the soil. Soils with high organic matter content have high erodibility. For the limiting factor on slopes in land capability classes found in II, III, IV, and VI class categories that are found in all LMUs, if these LMUs are used for agricultural cultivation, soil conservation measures are needed, such as making mound terraces or canal mound terraces, planting in strips and using mulch. The results show that the land capability classes consisted of 16668.30 ha in the land capability II class, 4184.06 ha land capability in the III class, 4524.91 ha in the land capability IV class, and 190.79 ha land capability VI class with a factor inhibiting soil erodibility (medium very high) and slopes (wavy - rather steep).
Life Cycle Cost Analysis And Payback Period of 12-Kw Wind Turbine For a Remote Telecommunications Base Station In Malaysia Azmi, A.; Sebayang*, Abdi Hanra; Harjon, Aditiya
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.33010

Abstract

Owing to the unavailability of electricity in many remote areas in Peninsular and East Malaysia, these areas do not have access to telephone signals. In remote areas, a diesel generator is used as the power source for the telecommunications base station. Hence, the continuous supply of diesel (which is a fossil fuel) is necessary in these remote areas. In this study, an attempt is made to assess the potential of replacing diesel-generated electricity with wind energy, which is renewable energy. Life cycle cost analysis is carried out, and the payback period of a wind energy system is determined for a remote telecommunications base station in Malaysia. The load characteristics and wind data are obtained from the Mersing Meteorological Station, Malaysia, and it was found that the annual load and base load are 12 kW. Hence, a 12-kW wind turbine is selected for the life cycle cost analysis at the site. The results show that the total specific cost of the 12-kW wind turbine is MYR 0.27/kWh based on a discount rate of 5% and electricity tariff in Malaysia of MYR 0.28/kWh. The payback period and discounted payback period of the 12-kW wind turbine are estimated to be 11.8 and 18.2 yr, respectively. Based on the load characteristics in Mersing, Malaysia, the 12-kW wind turbine is economically viable for the remote telecommunications base station. Nonetheless, the 12-kW wind turbine is not economically viable because the simple payback period is greater than 1/3 of the wind turbine's lifetime, which is 20 years. The 12-kW wind turbine, on the other hand, is suitable for use as a remote telecommunications base station.
Impact of Natural Pozzolan And The Degree of Circularity of Aggregates on The Thickness, Strength and Durability Of ITZ in Concrete ( Modeling and Experimentation) Loumachi, Lazhar; Mezghiche, Bouzidi; Belkadi, Ahmed Abderraouf
Aceh International Journal of Science and Technology Vol 12, No 1 (2023): April 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.1.28901

Abstract

The interfacial transition zone (ITZ) significantly negatively impacts the structural performance of concrete. This negative impact can be ameliorated by introducing mineral additions into the concrete. In this study, different forms (degree of circularity) of coarse aggregates and three contents (10%, 15%, and 20%) of mineral addition (natural pozzolan) were used to prepare ordinary concrete. This article aims to determine the optimal and effective mixture (the best form of aggregate and addition). This article aims to determine the optimal and efficient mixture (the best form of aggregate and addition) based on mechanical (compressive strength) and chemical (immersion in 3.5 % H2SO4 solution) tests. Furthermore, the effect of the interaction between the aggregate and the modified cementitious matrix was analyzed and discussed using the scanning electron microscope (SEM). The results show that adding 20% pozzolana improves the aggregate/matrix transition zone, making it possible to develop a maximum compressive strength at 60 days (51 MPa). In addition, the effect of mineral additions varies depending on the shape of the coarse aggregate. Thus, effective numerical modeling of the compressive strength is based on the full factorial design approach, considering the degree of circularity of the coarse aggregates and the pozzolan content.
Soil Chemical Properties and Nutrient Status on Various Land Slopes of Gayo Arabica Coffee Plantation, Aceh, Indonesia Muyassir*, Muyassir; Helmi, Helmi; Rahyunnisa, Meidilla
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.31413

Abstract

The chemical and soil nutrients on different land slopes are intriguing and crucial to investigate since they constitute the most significant impediment in sustaining soil fertility in coffee plantations. The issue is whether the slope of the soil can impact the soil's nutrient and chemical characteristics. This study aimed to identify soil chemical characteristics and available nutrients on different slopes of Gayo Arabica coffee plantations. The study used a survey method on smallholder coffee plantations in 6 villages in Bandar District, Bener Meriah Regency, and 12 composite soil samples were taken for laboratory analysis. The determination of the research location and sample points was selected by purposive sampling, with the slope of the land serving as the independent variable and the chemical composition of the soil serving as the dependent variable. The results showed that C-organic, C/N ratio, and base saturation differed significantly at various land slopes, while pH, CEC, N, P, and K were not significantly different. The soil C/N ratio in Gayo coffee plantations is modest, and the amount of C-organic material decreases with increasing land slope. Soil base saturation in Gayo Coffee plantations is very low, where the highest values are found on land slopes of 8-15%. Nitrogen and potassium content are moderate, while Phosphate is very low. The amount of these three nutrients is not affected by the land slope.
The Performance of Concentrically Braced Frames (CBF) in Chevron V Brace and Diagonal Configuration by Considering Various Frame Heights Panjaitan*, Arief; Hasibuan, Purwandy; Putra, Rudiansyah; Afifuddin, Mochammad; Haiqal, Muhammad; Adian, Fakhran; Naulia, Dwi Putroe; Hazid, Asraf
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.30848

Abstract

Concentrically Braced Frame (CBF) is a structural system with high stiffness, so it is recommended to be implemented in earthquake-hazard areas. The stiffness in CBF is contributed by its diagonal component, which is called bracing. Bracing reduces lateral deformation on the frame system because of the earthquake and prevents heavy damage or failure of the structure. So far, several studies have been conducted. However, the effect of the frame height and the bracing configuration on the CBF performance has not yet been clarified. This study analytically investigated several models of CBF in Chevron V Brace and Diagonal configurations. Those models were prepared with different frame heights. The analyses were conducted by employing the cyclic load and considering yield displacement control in each model. The observation was emphasized on the load-displacement hysteresis curve, from which the performance of each model can be revealed. Three parameters of performance are evaluated: strength, stiffness, and dissipation energy. The analysis discovered that the Diagonal CBF performed better than the Chevron V Brace CBF by presenting a larger and more stable hysteresis curve, which is addressed to better energy dissipation. It is also discovered that reducing the frame height is suggested to enhance the CBF performance due to the earthquake.
Development of a Portable Universal Testing Machine for Investigating the Mechanical Properties of Medium-Strength Materials Rizal, Muhammad; Aulia, Udink; Yudiansyah, Radinal
Aceh International Journal of Science and Technology Vol 12, No 1 (2023): April 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.1.31159

Abstract

The tensile test is reliable for revealing the fundamental stress-strain relationship. However, researchers have challenges when applying sufficient equipment to comprehend and assess the tensile characteristics of low-to-mediumstrength materials. This study describes the design and construction of a portable universal testing machine (UTM) for investigating the mechanical characteristics of medium-strength materials. The components of this machine include two stepper motors, a load cell, a load cell amplifier, a linear potentiometer, and a data acquisition system. The capability of this machine component is designed for a load of 10 kN with a maximum stroke of 150 mm with vertical motion. Samples of jute and glass fiber composites were tested at room temperature on this machine. The generated results were compared with those obtained from a commercial UTM to validate the developed machine. The values of the mechanical characteristics that a commercial UTM measured are quite similar to those acquired from the measurements that were taken by this machine. The conclusion is that this testing machine is simple, portable, reliable, and might be constructed cheaply

Page 24 of 36 | Total Record : 354

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