Garuda - Garba Rujukan Digital

All

Aceh International Journal of Science and Technology

AIJST
Website

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

11 12 13 14 15

The Analysis of SEIRS-SEI Epidemic Models on Malaria with Regard to Human Recovery Rate Resmawan Resmawan; Paian Sianturi; Endar Hasafah Nugrahani
Aceh International Journal of Science and Technology Vol 6, No 3 (2017): December 2017
Publisher : Graduate Program of Syiah Kuala University

This article discusses SEIRS-SEI epidemic models on malaria with regard to human recovery rate. SEIRS-SEI in this model is an abbreviation of the population class used in the model, ie Susceptible, Exposed, Infected, and Recovered populations in humans and Susceptible, Exposed, and Infected populations in mosquito. These epidemic models belong to mathematical models which clarify a phenomenon of epidemic transmission of malaria by observing the human recovery rate after being infected and susceptible. Human population falls into four classes, namely susceptible humans, exposed humans, infected humans, and recovered humans. Meanwhile, mosquito population serving as vectors of the disease is divided into three classes, including susceptible mosquitoes, exposed mosquitoes, and infected mosquitoes. Such models are termed SEIRS-SEI epidemic models. Analytical discussion covers model formation, existence and stability of equilibrium points, as well as numerical simulation to find out the influence of human recovery rate on population dynamics of both species. The results show that the fixed point without disease ( ) is stable in condition and unstable in condition . The simulation results show that the given treatment has an influence on the dynamics of the human population and mosquitoes. If the human recovery rate from the infected state becomes susceptible to increased, then the number of infected populations of both species will decrease. As a result, the disease will not spread and within a certain time will disappear from the population.

Grey Model for Stream Flow Prediction Vishnu B; Syamala P
Aceh International Journal of Science and Technology Vol 1, No 1 (2012): April 2012
Publisher : Graduate Program of Syiah Kuala University

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.

Capability of Catfish (Clarias gariepinus) to Accumulate Hg2+ From Water Heny Suseno
Aceh International Journal of Science and Technology Vol 4, No 3 (2015): December 2015
Publisher : Graduate Program of Syiah Kuala University

Mercury is hazardous contaminant that can be accumulated by aquatic organisms such as fishes, mussels etc. Catfish is one of source of animal protein but it also can accumulate Hg2+ from water that used in aquaculture. Due to less information about capability of catfish to accumulate Hg2+, therefore we studied bioaccumulation of Hg2+ that used biokinetic approach (aqueous uptake-rate, and elimination-rate). Nuclear application technique was applied in this study by using radiotracer of 203Hg. A simple kinetic model was then constructed to predict the bioaccumulation capability of by catfish. The result of experiments were shown that the uptake rate of difference Hg2+ concentration were 79.90 to 101.22 ml.g-1.d-1. Strong correlation between uptake rates with increasing Hg2+concentration. In addition, the elimination rates were range 0.080 – 0.081 day-1. The biology half time (t1/2b) of Hg2+ in whole body catfish were 8.50 – 8.63 days. However, no clear correlation between elimination rate with increasing concentration of Hg2+. The calculation of Bio Concentration Factor (BCF) shown catfish have capability to accumulated Hg maximum 1242.69 time than its concentration in water

PAPER TEMPLATE Word (.doc) and; Portable Document Format (.pdf)
Aceh International Journal of Science and Technology Vol 1, No 1 (2012): April 2012
Publisher : Graduate Program of Syiah Kuala University

Example Paper Template is below

Surface Energy Balance in Jakarta and Neighboring Regions As Simulated Using Fifth Mesoscale Model (MM5) Yopi Ilhamsyah
Aceh International Journal of Science and Technology Vol 3, No 1 (2014): April 2014
Publisher : Graduate Program of Syiah Kuala University

Abstract – The objective of the present research was to assess the surface energy balance particularly in terms of the computed surface energy and radiation balance and the development of boundary layer over Jakarta and Neighboring Regions (JNR) by means of numerical model of fifth generation of Mesoscale Model (MM5). The MM5 with four domains of 9 kilometers in spatial resolution presenting the outermost and the innermost of JNR is utilized. The research focuses on the third and fourth domains covering the entire JNR. The description between radiation and energy balance at the surface is obtained from the model. The result showed that energy balance is higher in the city area during daytime. Meanwhile, energy components, e.g., surface sensible and latent heat flux showed that at the sea and in the city areas were higher than other areas. Moreover, ground flux showed eastern region was higher than others. In general, radiation and energy balance was higher in the daytime and lower in the nighttime for all regions. The calculation of Bowen Ratio, the ratio of surface sensible and latent heat fluxes, was also higher in the city area, reflecting the dominations of urban and built-up land in the region. Meanwhile, Bowen Ratio in the rural area dominated by irrigated cropland was lower. It is consistent with changes of land cover properties, e.g. albedo, soil moisture, and thermal characteristics. In addition, the boundary layer is also higher in the city. Meanwhile western region dominated by suburban showed higher boundary layer instead of eastern region. Keywords: MM5; Energy components; Land cover properties

Participatory Mapping of Environment Sanitation Conditions in Settlement of Floating House in Ternate City Firdawaty Marasabessy; Vrita Tri Aryuni
Aceh International Journal of Science and Technology Vol 9, No 3 (2020): December 2020
Publisher : Graduate Program of Syiah Kuala University

The water settlement has unique and distinctive characteristics, but it can become an environmental problem if the sanitary conditions are poor. The poor sanitary occurred in the water settlement, namely in Makassar Timur and Mangga Dua Utara, which were initially iconic settlements, but now, both of these settlements have environmental degradation. In line with the Sustainable Development Goals, strengthening community participation was carried out to realize clean water and proper sanitation. The research aimed to map the environmental sanitary conditions by involving community participation. This mapping describes sanitary water settlement characteristics to become a planning database to handle both areas' sustainable hygienic. The results showed that the sanitary achievement index in the two regions, above 50% of the conditions were carried or sufficient. The findings showed the mapping of settlement on the water in the two areas, revealed environment condition with the same characteristics in which the environmental conditions had experienced environmental degradation due to contamination of water bodies because of solid and liquid waste originating from residential houses deliverables from upland settlements. In the future, the settlement environment in Makassar Timur District will be planned to be completely stockpiled. As a result, this environmental area will lose its identity as a settlement on the water. Meanwhile, land conflicts occurred in Mangga Dua Utara District's settlement, resulting in the lack of government programs in this environment to structure slum environmental conditions

Antibacterial Mechanism of The Ehyl Acetate Extracts From Naked Oat Again Bacillus subtilis Li-Huan Yuan; Qing-Ping Hu; Jian-Guo Xu
Aceh International Journal of Science and Technology Vol 4, No 1 (2015): April 2015
Publisher : Graduate Program of Syiah Kuala University

The antibacterial mechanism of the ethyl acetate extracts from naked oat against Bacillus subtilis were studied in this paper based on assays such as cell wall alkaline phosphatase (AKP), permeability and integrity of cell membrane as well as electron microscopy observations. The results showed that the ethyl acetate extracts had significant effects on AKP, permeability and integrity of cell membrane. We concluded that the mechanism of action of the ethyl acetate extracts against B. subtilis might be described as:Acting on cell wall and membrane, resulting in disruption, cell lysis, and the leakage of intracellular constituents according to the results of AKP, the leakage of electrolytes, the losses of contents (proteins, reducing sugars and 260 nm absorbing materials) assays and electron microscopy observations. Overall, the results clearly indicated that the ethyl acetate extracts from naked oat was potential to control the contamination of foods caused by bacterial diseases

Quantifying the Seismicity Parameters of A New Model of Seismic Source Zone for Aceh and Surrounding Areas Juellyan Juellyan; Bambang Setiawan; Muttaqin Hasan; Taufiq Saidi
Aceh International Journal of Science and Technology Vol 11, No 3 (2022): December 2022
Publisher : Graduate Program of Syiah Kuala University

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 each 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 for Aceh and the surrounding areas is divided into four zones: 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.

Atmospheric Pollutant Flow and Precipitation: Modeling Effects on the Vegetation Ecosystem Allag Fateh; Saddek Bouharati; Lamri Tedjar; Mohamed Fenni
Aceh International Journal of Science and Technology Vol 7, No 3 (2018): December 2018
Publisher : Graduate Program of Syiah Kuala University

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.

Impact of On-street Parking on Urban Arterial Performance: A Quantitative Study on Travel Speed and Capacity Deterioration Sugiarto -; Thirayoot Limanoond
Aceh International Journal of Science and Technology Vol 2, No 2 (2013): August 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract - Traffic congestion has been a serious social and technical problem since the early year’s rapid motorization in Banda Aceh, Aceh Province of Indonesia. Urban arterial performance becomes the crucial concerns of many traffic engineers. Arterial performances were analyzed using oblique cumulative plots and breakdown method. The approaches are time series treatment between cumulative vehicles arrival versus time contracted from data recorded by video cameras. Investigations were conducted during both morning and evening peak hours on three regular weekdays for observing saturation condition in order to observe the maximum capacity under prevailing conditions. This study examined the impact of presence on-street parking on deterioration both travel speed and capacity. It found that capacity diminished slightly 10-13% (275-368vph) compared to the pre-breakdown condition. Likewise, during the breakdown, speed dropped about 13-19% (3-5kph) controlled by pre-breakdown as well. The simulation software so called VISSIM 5.30 was governed to estimate the measurement of effectiveness (MOEs) by removing on-street parking from a site of study. The MOEs reveal that removing on-street parking able to reduce average delay approximately 12 sec/veh (32%) and increase speed about 5kph (24%). Keywords: Arterial performance, pre-breakdown, breakdown, travel speed, capacity, on-street parking, simulation, VISSIM 5.30, MOEs.

Page 13 of 36 | Total Record : 354

11 12 13 14 15

Filter by Year

2012 2025

Filter By Issues

All Issue Vol 14, No 2 (2025): August 2025 Vol 14, No 1 (2025): April 2025 Vol 13, No 3 (2024): December 2024 Vol 13, No 2 (2024): August 2024 Vol 13, No 1 (2024): April 2024 Vol 12, No 3 (2023): December 2023 Vol 12, No 2 (2023): August 2023 Vol 12, No 1 (2023): April 2023 Vol 11, No 3 (2022): December 2022 Vol 11, No 2 (2022): August 2022 Vol 11, No 1 (2022): April 2022 Vol 10, No 3 (2021): December 2021 Vol 10, No 2 (2021): August 2021 Vol 10, No 1 (2021): April 2021 Vol 9, No 3 (2020): December 2020 Vol 9, No 2 (2020): August 2020 Vol 9, No 1 (2020): April 2020 Vol 8, No 3 (2019): December 2019 Vol 8, No 2 (2019): August 2019 Vol 8, No 1 (2019): April 2019 Vol 7, No 3 (2018): December 2018 Vol 7, No 2 (2018): August 2018 Vol 7, No 1 (2018): April 2018 Vol 6, No 3 (2017): December 2017 Vol 6, No 2 (2017): August 2017 Vol 6, No 1 (2017): April 2017 Vol 5, No 3 (2016): December 2016 Vol 5, No 2 (2016): August 2016 Vol 5, No 1 (2016): April 2016 Vol 4, No 3 (2015): December 2015 Vol 4, No 2 (2015): August 2015 Vol 4, No 1 (2015): April 2015 Vol 3, No 3 (2014): December 2014 Vol 3, No 2 (2014): August 2014 Vol 3, No 1 (2014): April 2014 Vol 2, No 3 (2013): December 2013 Vol 2, No 2 (2013): August 2013 Vol 2, No 1 (2013): April 2013 Vol 1, No 3 (2012): December 2012 Vol 1, No 2 (2012): August 2012 Vol 1, No 1 (2012): April 2012 More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Sugianto

Contact Email
sugianto@usk.ac.id

Phone
+6281360560198

Journal Mail Official
journal.aijst@usk.ac.id

Editorial Address
Graduate Program of Syiah Kuala University Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia. Phone: 62-(0)651- 7407659. E-mail: journal.aijst@usk.ac.id

Location
Kab. aceh besar,

Aceh

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Sugianto

Contact Email sugianto@usk.ac.id

Phone +6281360560198

Journal Mail Official journal.aijst@usk.ac.id

Editorial Address Graduate Program of Syiah Kuala University Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia. Phone: 62-(0)651- 7407659. E-mail: journal.aijst@usk.ac.id

Location Kab. aceh besar, Aceh INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Sugianto

Contact Email
sugianto@usk.ac.id

Phone
+6281360560198

Journal Mail Official
journal.aijst@usk.ac.id

Editorial Address
Graduate Program of Syiah Kuala University Kopelma Darussalam, Banda Aceh 23111, Aceh, Indonesia. Phone: 62-(0)651- 7407659. E-mail: journal.aijst@usk.ac.id

Location
Kab. aceh besar,

Aceh

INDONESIA