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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 6 Documents

Search results for , issue "Vol 2, No 1 (2013): April 2013" : 6 Documents clear

Development of Rainfall-runoff Modeling Using a Tank Model: Problems and Challenges in Province of Aceh, Indonesia Hairul Basri
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abtstract - Rainfall-runoff modeling using tank model founded by Sugawara has been widely used in Asia. Many researchers use the tank model to predict water availability and flooding in a watershed. This paper describes the concept of rainfall-runoff modeling using tank model, discuss the problems and challenges the use of tank model, especially in Province of Aceh, Indonesia and how to improve the outcome of simulation of tank model. Many factors affect the rainfall-runoff phenomena of a wide range of watershed include: soil type, land use types, rainfall, morphometry, geology and geomorphology, caused the tank model usefull only for concerning watershed. It is necessary to adjust some parameters of tank model for other watershed by recalibrating the observed and simulated discharges. Rainfall runoff modeling using the tank model for a watershed scale is more reasonable focused on each sub-watershed by considering soil types, land use types and rainfall of the concerning watershed. Land use data can be enhanced by using landsat imagery or aerial photographs to support the validation the existing of land use type. Long term of observed discharges and rainfall data should be increased by set up the AWLR (Automatic Water Level Recorder) and rainfall stations for each of sub-watersheds. The reasonable tank model can be resulted not only by calibrating the observed and simulated discharges, but also by considering the observed and simulated infiltration for each soil and land use types of the concerning watershed.

Determining Groundwater Recharge from Stream Flow with Seasonal Recession Method Ichwana -; Zulkifli Nasution; Sumono -
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract - Volume of groundwater recharge showed a picture of a watershed to determine the flow instability due to the physical characteristics of the watershed and precipitation. Many methods had been constructed to understand the dynamic movement of water discharge. One of them was the analysis of the stream hydrograph with Seasonal Recession Method. Information about groundwater recharge condition at several sub watershed in Krueng Peusangan Watershed was really needed in management of watershed for sustainable water resources. The study aimed to determine groundwater recharge from stream flow with seasonal recession method was conducted in Krueng Peusangan watershed, Aceh Province, Indonesia. The results showed that the trend pattern of the stream hydrograph could be explained using the exponential function where the dots lowest discharge that is the end of the recession (y) than any period of time on stream hydrograph semi logarithmic (x). The pattern of results that occurred in the watershed of Krueng Peusangan: (A) Krueng Seumpo had a trend for y = 9.2x-0.35, (B) Simpang Jaya for y = 559.7x-0.5, (C) Beukah village for y = 142x-0.32 , (D) Sub watershed of Lut Tawar (Wih Nareh) for y = 1.3x-0.12 and (E) Sub watershed of Teupin Mane (Krueng Teumbo) for y = 1.94x-0.42. It also showed that the location of A, B, C, E had a higher slope and a decreased recharge pattern compared to the location of D (sub watershed of Lut Tawar) that tended to flat. The volume of groundwater recharge that occurred in a region (A and D) increased while the other location was very volatile. Moreover, recharge instability occurred in Krueng Teumbo. Therefore, it needed a clear direction for land use and functions of forests, especially in the recharge area, in order to maintain the balance of the hydrological cycle, and the quantity of groundwater. Keywords: groundwater recharge, seasonal recession method, base flow, stream flow, water resources

Effects of Dietary Katuk Leaf Extract on Growth Performance, Feeding Behavior and Water Quality of Grouper Epinephelus coioides Agus Putra A. S; Urip Santoso; Meng Chou Lee; Fan Hua Nan
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract - Plant-derived materials are believed as potential nutrient sources to be applied in aquaculture. Although many studies to assess the benefits of plant extracts have been conducted, however effects of dietary katuk (Sauropus androgynus L. Merr.) on growth performances, feeding behavior and water quality of grouper (Epinephelus coioides) are not well known. In this study, 25 grouper juveniles weighing 11.27 ± 2.53 g were reared into 100-L tank (60 x 50 x 35 cm) and cultivated for 70 days. The fish were divided into four groups in triplicate, and were offered diet without katuk extract (control), diet supplemented with 1% katuk extract (SAA); diet supplemented with 2.5% katuk extract (SAB) and diet supplemented with 5.0% katuk extract (SAC) twice daily. Statistical analyses showed that dietary katuk extract caused a significant (P 0.05) increase in growth rate and feed intake. The efficiency of feed was also significant when fish offered diets supplemented with 1% of katuk extract which indicated by a lower feed conversion ratio. However, no statistical differences were observed on the survival rate, condition factor, viscerosomatic index and hepatosomatic index. Observation on feeding behavior found that all treated fish consumed compounded diet just after provided into their tank and there were no abnormal behavior or any healthy problems during experimental periods. It demonstrated that application of katuk extract in fish diets is acceptable and can stimulate the fish appetites. In conclusion, our studies indicated that dietary katuk (Sauropus androgynus) extract can be applied in aquaculture to stimulate the growth and improve feed utilization.Keywords: Feed conversion ratio, feed utilization, plant extract, Sauropus androgynus.

Development of Rainfall-runoff Model Using Tank Model: Problems and Challenges in Province of Aceh, Indonesia Hairul Basri
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abtstract - Rainfall-runoff model using tank model founded by Sugawara has been widely used in Asia. Many researchers use the tank model to predict water availability and flooding in a watershed. This paper describes the concept of rainfall-runoff model using tank model, discuss the problems and challenges in using of the model, especially in Province of Aceh, Indonesia and how to improve the outcome of simulation of tank model. Many factors affect the rainfall-runoff phenomena of a wide range of watershed include: soil types, land use types, rainfall, morphometry, geology and geomorphology, caused the tank model usefull only for concerning watershed. It is necessary to adjust some parameters of tank model for other watershed by recalibrating the parameters of the model. Rainfall runoff model using the tank model for a watershed scale is more reasonable focused on each sub-watershed by considering soil types, land use types and rainfall of the concerning watershed. Land use data can be enhanced by using landsat imagery or aerial photographs to support the validation the existing of land use type. Long term of observed discharges and rainfall data should be increased by set up the AWLR (Automatic Water Level Recorder) and rainfall stations for each of sub-watersheds. The reasonable tank model can be resulted not only by calibrating the parameters, but also by considering the observed and simulated infiltration for each soil and land use types of the concerning watershed. Key words: rainfall-runoff model, tank model, infiltration, land use types, soil types, watershed

Facility Location Modeling in Multi-Echelon Distribution System: A Case Study of Indonesian Liquefied Petroleum Gas Supply Chain Ilyas Masudin
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract -This paper presents model of Indonesian LPG supply chain by opening new facilities (new echelon) taking into account the current facilities. The objective is to investigate the relation between distribution costs such as transportation, inventory cost and facility location in Indonesian multi-echelon LPG supply chain. Fixed-charged capacitated facility location problem is used to determine the optimal solution of the proposed model. In the sensitivity analysis, it is reported that the trade-offs between facility locations and distribution costs are exist. Results report that as the number of facility increases, total transportation and inventory cost also increase.Keywords: LPG supply, location, inventory, transportation

Vectorial Formalism of Polyphase Synchronous Machine With Permanents Magnets Abdelkrim Sellam; Boubakeur Dehiba; Mohamed B. Benabdallah; Mohamed Abid; Nacéra Bachir Bouiadjra; Boubakeur Bensaid; Mustapha Djouhri
Aceh International Journal of Science and Technology Vol 2, No 1 (2013): April 2013
Publisher : Graduate Program of Syiah Kuala University

Abstract- This paper presents a mathematical model that transforms the real machine to fictitious machines and our goal is to simulate these and see the behavior of these machines in load. The polyphase machines are developed mainly in the field of variable speed drives of high power because increasing the number of phases on the one hand allows to reduce the dimensions of the components in power modulators energy and secondly to improve the operating safety. By a vector approach (vector space), it is possible to find a set of single-phase machine and / or two-phase fictitious equivalent to polyphase synchronous machine. These fictitious machines are coupled electrically and mechanically but decoupled magnetically. This approach leads to introduce the concept of the equivalent machine (multimachine multiconverter system MMS) which aims to analyze systems composed of multiple machines (or multiple converters) in electric drives. A first classification multimachine multiconverter system follows naturally from MMS formalism. We present an example of a pentaphase (polyphase) synchronous machine for a simulation and study the behavior of the machine load. Keywords: Polyphase machines, multimachine concept, vector space, eigenvectors, eigenvalues, pentaphase machine.

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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

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

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