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Aceh International Journal of Science & Technology
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.
Articles
126
Articles
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Development Chitosan-based forward Osmosis Membranes for Emergency Drinking Water Supply

Saiful, Saiful, Riana, Ulfa, Marlina, Marlina, Ramli, Muliadi, Mahmud, Nizar

Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

Development of forward osmosis (FO) membranes became one of the alternative methods for drinking water supply in an emergency. In this research, drinking water bags based on FO membrane  have been developed using chitosan as the basic material of membrane. The chitosan membrane used for the manufacture of drinking water bags has a thickness of 0.043 mm, 30.3% porosity, tensile strength 28.83 kgf / mm2, swelling degree 43.5% and elongation of 7.16%. Drinking water bags are made with a combination of Polypropylene Plastic (PP) and aluminum foil with FO membrane inside. This drinking water bag can be applied for brackish water purification to be energy drinking water as one of the solutions for the drinking water supply in emergencies. FO process testing is done by using variation of sugar solution as the draw solution, that are glucose, fructose, sucrose and mixture. The concentration of applied draw solution is 1, 2 and 3M within 1 hour treatment. The highest water flux was obtained in 3M sucrose solution with a flux value of 5.25 L/m2hour. The results of drinking water quality parameters  analysis  in the form of pH, Total Dissolve Solid (TDS), salinity, conductivity, heavy metals and Escherichia coli (E. coli) contents showed that the FO water produc meets drinking water quality standards based on  Indonesian government regulation of drinking water quality. FO-membrane-based drinking water bags are potentially used as an alternative solution for the energy drinking water supply in an emergency.

Effects of Drying Time on Yield and Moisture Content of “Sumahe” Powdered Drink Using Spray Dryer

Ismiyati, Ismiyati, Sari, Fatma, Nugrahani, Ratri Ariatmi, Ramadhan, Anwar Ilmar

Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

As people today are becoming more health-conscious, various efforts have been made to keep up one’s health, such as by consuming highly nutritious food and drinks. One of the nutritious food sources produced from bees is honey, bioactive compounds of polyphenols, glyoxal and methylglioxal. Honey could be used as a health drink by mixing with ginger. This health drink is also produced as powdered drink to simplify storing, reduce the use of plastic packaging, and to add product value to increase market share. The aim of this research was to analyze the effects of drying time for 5, 15, and 25 minutes with an addition of maltodextrin on the yield, density, and moisture content of “Sumahe” instant powdered drink, made from cow’s milk, honey, and ginger. The results showed that the longer the drying time, the lower the moisture content of the drink. Meanwhile, the longer the drying time, the higher the yield became. A taste test of “Sumahe” also indicated that from 25 minutes of drying time, most of the panelists rated the drink as tasteful and delicious.

Analysis of Digital Divide in Mastery of ICT in Palangka Raya City

Purmasari, Purmasari Purmasari, Setyohadi, Djoko Budiyanto, Santoso, Albertus Joko

Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

This study aims to measure the digital divide by analyzing the influencing factors of the divide (gap) and the effectiveness of ICT public services in Palangka Raya City. The method used for measuring the digital divide in this study was the SIBIS method, the result of the activities of the European Commission which is used for analyzing and comparing different indicators and adapted to environmental conditions. The SIBIS GPS (General Population Survey) indicator was used in this study included the availability of ICT access, ICT utilization, and levels of ICT and e-government capability. The population in this study was the people of Palangka Raya City with a sample of 399 respondents. The results of digital divide measurement in this study showed that the level of digital divide as seen from the aspects of access availability, utilization and level of ICT capability was at medium category, the level of digital divide as seen from the aspect of e-government was in low category, and the level of digital divide as seen from the aspect of demography showed a clear distinction to the digital divide in Palangka Raya City

Atmospheric Pollutant Flow and Precipitation: Modeling Effects on the Vegetation Ecosystem

Fateh, Allag, Bouharati, Saddek, Tedjar, Lamri, Fenni, Mohamed

Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

Because of their fixed life and wide distribution, plants are the first victims of air pollution. The atmosphere is considered polluted when the increase of the rate of certain components causes harmful effects on the different constituents of the ecosystems. The study of the flow of air near a polluting source (cement plant in our case), allows to predict its impact on the surrounding plant ecosystem. Different factors are to be considered. The chemical composition of the air, the climatic conditions, and the impacted plant species are complex parameters to be analyzed using conventional mathematical methods. In this study, we propose a system based on artificial neural networks. Since artificial neural networks have the capacity to treat different complex parameters, their application in this domain is adequate. The proposed system makes it possible to match the input and output spaces. The variables that constitute the input space are the chemical composition, the concentration of the latter in the rainwater, their duration of deposition on the leaves and stems, the climatic conditions characterizing the environment, as well as the species of plant studied. The output variable expresses the rate of degradation of this species under the effect of pollution. Learning the system makes it possible to establish the transfer function and thus predict the impact of pollutants on the vegetation.

Liquefaction Assessment Using the CPT and Accounting for Soil Ageing

Setiawan, Bambang, Jaksa, Mark

Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

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.

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

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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.

Characterization of Rare Earth Elements in Tailing of Ex-Tin Mining Sands from Singkep Island, Indonesia

Hamzah, Yanuar, Mardhiansyah, Muhammad, Firdaus, Liong Nyuk

Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

The objective of this research is to determine the rare earth elements (REEs) from themonazite minerals content of several tin tailing sands (TTS)of ex-tin mining area in Kuala Raya Singkep Island, Indonesia. We used the energy dispersive analysis of  X-ray (EDAX)-scanning electron microscopy (SEM) and x-ray diffraction (XRD) to characterize the contents of the samples. The coupled analytical of XRD with SEM/EDX approach enabled to be used for mineralogical identification on the heavy mineral as a rapid determination approach. The analysis of the samples indicates only the presence of REEs including lanthanum (La), cerium (Ce), and thorium (Th) are consistent with the identification of monazite and minerals in the tailing sand. The results show that the average REEs consist of La at 0.2 .%, Ce at 7.8 %, and Th at 2.0% respectively. It is concluded that monazite minerals in TTS has an economic potential to be developed. These monazite minerals can be used as material for semiconductor devices.   

Luwak Coffee Classification Using UV-Vis Spectroscopy Data: Comparison of Linear Discriminant Analysis and Support Vector Machine Methods

Suhandy, Diding, Yulia, Meinilwita

Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

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.

Evaluation of Workers and Customers Exposure to Noise Level in Delta Mall and Robinson Plaza, Delta State, Nigeria

Farouq, Ado Umar, Ahonsi, Peter I

Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

This research work titled â??Evaluation of Noise Exposure Level in Delta Mall and Robinson Plazaâ?ť was aimed at the determination of the noise exposure level and itâ??s implication to the health of workers/individuals in Delta Mall and Robinson Plaza. A sound level meter (SLM) of model 407736 was used to measure the noise level in Delta Mall and Robinson Plaza. At Robinson plaza, the noise was measured in 13 different locations and they are numbered Block A â?? N with an exception of Block I. The procedure was carried out in the morning (9:00am â?? 9:30am), afternoon (1:00pm â?? 1:30pm), and evening (6:00pm â?? 6:30pm) measurements for a period of 30 days. The noise exposure level of the entire study area for Robinson Plaza, revealed an average dose of 177.2% and equivalent TWA of 94.1 dBA for 12 hours duration per day and when compared with OSHA standard, it exceeded the exposure action value in the OSHA noise exposure limits (90 dBA for 8 hours duration per day), hence, a detailed risk assessment must be completed for the entire Robinson Plaza. While the noise exposure level of the entire study area for Delta Mall, revealed an average dose of 115.5% and equivalent TWA of 91.0 dBA for 12 hours duration per day and when compared with OSHA standard, it exceeded the exposure action value in the OSHA noise exposure limits (90 dBA for 8 hours duration per day), hence, a detailed risk assessment must be completed for the entire Delta Mall. Itâ??s therefore concluded that the noise generated from both Delta Mall and Robinson Plaza can be harmful to the health of workers. It was recommended that due to these possible effects of noise pollution on the populace, the following action should be carried out: Isolate noise at source, Using protection equipment, Urgent need for legislation to control noise pollution, and Public awakening and education.

Measuring Passenger Car Unit (PCU) at Four Legged Roundabout using Time Occupancy Data Collected from Drone

Sugiarto, Sugiarto, Apriandy, Fadhlullah, Faisal, Ruhdi, Saleh, Sofyan M.

Aceh International Journal of Science and Technology Vol 7, No 2 (2018): August 2018
Publisher : Graduate School of Syiah Kuala University

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Abstract

This study aims to measure the values of passenger car unit (PCU) at a four-legged roundabout based on the time occupancy data in complex traffic operation. Within mixed traffic, the PCUs are needed as a equivalency factor to convert various type of vehicles to a standard unit. The unit of PCU was used to determine capacity and level of service of specific the traffic condition. The composition of vehicles going through the intersection,  mostly varies and each type of vehicles tends to have diverse effects on capacity and level of services. Consequently, a conversion factor from various vehicles to a standard vehicle is required.   The data of this study was collected using a drone at the investigated roundabout at one of the major roundabouts in Aceh Besar, Aceh province, Indonesia. The method used was the vehicles time occupancy, in which  calculated from  the average time required by each vehicle to pass through the roundabout area. The results show that the PCU values obtained is 0.16 for motorcycle, 0.59 for rickshaw, 1.07 for pickup, 1.91 for a medium vehicle, and 3.76 for the heavy vehicle. These results should be utilized for converting various type of vehicles into PCUs to estimate capacity and level of services, especially at the roundabout trafict. This results may be suitable to revise the Indonesian Traffic Code, named Indonesian Highway Capacity Manual 1997, and useful for ongoing national-level efforts to upgrade the  Indonesian Highway Capacity Manual.