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Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter
Published by Universitas Syiah Kuala
ISSN : -     EISSN : -     DOI : -
Core Subject : Education, Engineering,
Engineering Other
Arjuna Subject : -
Articles 19 Documents
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Search results for , issue "Vol 4, No 1 (2014): Engineering" : 19 Documents clear
Analysis for ground anchor using 2D simulation model by MIDAS/GTS software MUNIRA SUNGKAR; JASON WU
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

Ground anchors are commonly exposed to both acidic and alkaline ground conditions depending on ground mineral content, soil/rock type, age and groundwater flow path. It is essential to understand the limitations to ground anchorage materials especially when exposed to aggressive ground conditions whilst in a stressed state. This study discusses about ground anchors and analysis of the ground anchor failure trigger by corrosion, which analysed by using difference software in previous study (ABAQUS) compare with simulation model analysed by 2D Midas/GTS. Numerical techniques may be very efficient for investigating the load transfer of ground anchors. The results of anchor failures in numerical modeling are different from previous study (field test results), practiced by first cement crack and then wire break. Recommendations are given for applying FEM (finite element method) analysis to the design of anchored stabilization systems, and also for analyzing design variables, and design loads, to achieve more efficient and cost-effective anchored stabilization systems. Several models or simulations are presented to illustrate the displacement and the load that applied to the anchor which analyzed by Midas/GTS software. However, the condition that the numbers of occurrence correspond to load of failures at the time of damages is caused as the consequence of material and model deviation
Tidal analysis at Kuala Langsa and Pusong Island using Admiralty method ANNISA S. SUGIARTI; . MARWAN; ICHSAN SETIAWAN
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

A research about tidal analysis at Kuala Langsa and Pusong Island with different physical condition had been done, where Kuala Langsa is an estuary and Pusong Island is a coastal area in Kota Langsa District, Aceh Province. The purpose of this research is to determine tidal type on both locations. This research used secondary data which is obtained from Kuala Langsa – Pusong Island Hydro – Oceanographic Survey and primary data which is taken about 29 hours at both locations.  Admiralty method had been using to analyze the tides and from this method can be obtain amplitude and phase lag based on Formhazl number. The result of this research according to Formhazl number for Kuala Langsa and Pusong Island are 0.12 and 0.23 respectively. Both values of Formhazl number of the locations are smaller than 0.25, it concluded that both locations had showed same tidal type, i.e. semidiurnal. The phase lag for tidal types in Kuala Langsa for M2 is 3590while for Pusong Island is 3300. While for the amplitude of both locations for M2 is 56 cm for Kuala Langsa and 48 cm for Pusong Island. It is shown that the amplitudes at Kuala Langsa are a little bit higher than that of Pusong Island. The difference is suspect due to the different physical condition of the observation areas
Fault modelling based on local magnetic anomaly data in geothermal prospect area Rajabasa Lampung IKA DARUWATI
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

Two and half dimensions fault modelling was conducted based on Local Magnetic Anomaly Data in Mount Rajabasa site, Lampung. The research utilized total magnetic anomaly secondary data to perform quantitative interpretation. The total magnetic anomaly data was then transformed into flat field, reduced to a pole and carried upward continuation until at an altitude of 4000 MSL to separate local anomaly and regional anomaly. Based on the qualitative interpretation of the anomalous magnetic field, it indicates a normal fault with the direction of northeast – southwest and northwest – southeast. In the research, quantitative interpretation was done to local anomaly by selecting two locations that showed the presence of lineament patterns in the contour. Modelling was conducted by using Mag2DC software. By modelling those two sites, was obtained that fault model that is located in Mount Rajabasa area is a normal fault trending northwest – southeast with the value of magnetic susceptibility contrast of 0.004 and -0.015 in cgs units
Wastewater characteristics from tofu processing facilities in Banda Aceh M. FAISAL; FARID MULANA; POCUT N. ALAM; HIROYUKI DAIMON
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

Tofu is a very favorite food in Asian countries such Indonesia, and is gaining popularity among west countries as well, due to the associated health benefits and its acceptable price. Tofu which is produced by grinding of soy bean produces high of amount wastewater, and is considered as one of the most polluting food-industrial effluent due to its high values of organic pollutants. This paper analyzed  some pollutants parameter discharged from tofu industries in Banda Aceh. The parameter of BOD, COD, MLSS, PO4-P NH3-N, Turbidity and pH were analyzed based on the standard method for the examination of water and wastewater, approved by the EPA. The COD and BOD of wastewater from tofu processing facilities in Banda Aceh is ranging from 5000-8500 and 3500-4500 mg/L, respectively. Site investigation showed that in Banda aceh city, the tofu waste has been disposed into the environment without any treatment, causing bad odours and pollution of the surface, ground water and river
Effect of combination of dispersion and non linear term to downstream running nonlinear water waves MARWAN RAMLI; T. KHAIRUMAN3; SAID MUNZIR
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

This paper discuss the impact of dispersion and non-linear terms combinations the surface wave equation particularly on the peaking phenomena of the wave water that initially in the form of a bichromatic wave. The study for both of these terms are focused on the position where the bichromatic wave experience its highest peaking and its related bichromatic amplitude amplification. In the previous study, the position where the bichromatic wave experience its highest peaking is of order   and its bichromatic amplitude amplification is of order , where  and  are the amplitude and frequency of the bichromatic wave envelope, respectively. This result is based on the fifth order Korteweg de Vries (KdV) equation and the quantity that obtained is called Maximal Temporal Amplitude (MTA). However, despite the the position where the bichromatic wave experience its highest peaking suits the result  of Stansberg experiment and the result of numerical calculation using HUBRIS, its related bichromatic wave amplitude amplification is not close enough. The source of this discrepancy is suspected from the dispersion and non-linear terms of the KdV equation used. This study shows that the existence of the dispersion and non-linear terms influences the position of  Maximal Temporal Amplitude (MTA) and its bichromatic wave amplitude amplification.  For the coefficient of dispersion term of 1.0065 and  nonlinear term of , the position of MTA and bichromatic wave amplitude amplification suits the result of Stansberg experiment and the result of numerical calculation using HUBRIS
The effect of MA/MAPE combination as coupling agent in formation of rice husk and recycled HDPE-based composites FARID MULANA
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

In this study, composites were made from source of recycled HDPE and rice husk as filler as well as addition of double coupling agent in order to improve mechanical properties of produced composites. The aim of this study is to know the effect of addition of double coupling agent of maleic anhydride (MA) and maleic anhydride polyethylene (MAPE) on quality of produced composites. In this research, the ratio of MA and MAPE that applied are 1:1; 1:2 and 2:1. The hot press method was used in order to form these composites. The composite formation process was perfomed at medium temperature of 170 oC for 30 minutes. After pressed manually and heated at these temperature later composite samples were cooled to room temperature naturally, and finally composites were tested to know its mechanical properties of tensile strength and bending strength as well as water absorption capacity. The results showed that the simultant addition of MA and MAPE as double coupling agent can improve the quality of the produced composites. The amount of MAPE that is added in MA coupling agent affected both the value of the tensile strength and bonding strength of the composites. The similar characterstics also occurred on property of water absorption on immersed composite. By addition of the MAPE and MA together then both coupling agents are increasing bonding adhesion between matrix and filler becomes stronger and tighter. The highest value of tensile strength of 5.75 MPa was obtained on the composite ratio of MA:MAPE= 1:2. While the highest value of bending strength of 4.1 MPa was also obtained on the composite with the same ratio. The highest water absorption of produced composites was found on composite by adding of ratio MA:MAPE=2:1 that is 9.4%
Ten years since 2004 Sumatera earthquake and three years since 2011 2011 Tohoku earthquake: Early-warning system alone cannot save everyone KIMATA FUMIAKI
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

Much  Japanese watched the tsunami video attacking  Banda Aceh on the 2004 Sumatra, and they have a lot of tsunami disaster memories, and early tsunami warming system. However,  we lost about  20,000 people by the 2011 Tohoku earthquake tsunami.  It makes clear that we never rescue the people from the tsunami only by an early warming syste. In February 2004, a research team of Nagoya University was coming to Banda Aceh to investigate the disaster on th 2004 Sumatra earthquake tsunami (I was a research member of Nagoya University  at the 2004 Sumatra earthquake, and joint the research team  since the first field survey in 2012). Not only the natural scientists but also the humanities’ scientists, including Indonesians join the research team, and field researches in Aceh have been continued every year until now. As results of the research, eight annual reports totally to 1,000 pages and four books, including writings in Indonesia are published. Through the first interviews in Banda Aceh, we understand that not so many peo- ple remained the tsunami coming after the earthquake felt, and when they watched the tsunami they never shouted ”Tsunami!”. They shouted out,”Sea is ascending”. As re- sults, there are many fatalities by the tsunami along the coastlines.They had no time to evacuate from the tsunami, because they started the evacuation after they watched the attacking tsunami. In one village, only the people going out the village to the down-town were saving their lives.
Performance of a double-junction solar cell under various environmental conditions I. D. SARA
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

PV manufacturers only provide performance of a PV technology at a standard test condition (STC) where the irradiance at 1000 W/m2, spectrum of AM1.5 and a module temperature at 25°C. This information is inadequate to represent the performance of the PV device under real operating conditions. This paper investigates the performance of a double-junction solar cell under different climatic conditions, i.e. temperature, irradiance, solar spectrum, and the angle of incidence. The effects of environmental conditions on the cell’s performance are observed by simulating their current and voltage characteristics using a one-diode. The results show that the short-circuit current of a double-junction device is spectrally sensitive to the incident irradiance and solar spectrum. When the angle of incidence is greater than 60°, the maximum power of a double-junction solar cell reduces significantly
Determination of platinum group elements (PGE) in soil and grass using ICP-MS in UKM Engineering Lake RINDI G. HATIKA
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

Three elements in platinum group elements (PGE) which are platinum (Pt), palladium (Pd) and rhodium (Rh) are widely used in vehicle exhaust as catalyst in changing material and toxic gases such as CO, HC and NOx. However, the release of vehicle exhaust emission has increased the content of platinum group elements in the environment including dust, soil, water and grasses and sediments. The research aimed to determine the PGE content in grass and soil and to determine the concentration of Pt, Pd and Rh metals obtained in samples. The research was done at 4 station at UKM Engineering Lake, Malaysia. Analysis was done using Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Result of the research showed that Rh metal was present at grass and soil sample. The Rh metal concentration in grass sample is between 1. 770 µg/g to 15.225 µg/g and in soil sample is between 2.347  µg/g to 9.579  µg/g. Pt and Pd were not detected in all samples and all stations. There are 80 other elements detected in the analysis. However, only four elements were taken into consideration which were Cu, Zn, Ni and Pb Since these elements were originated from vehicles activities. Their presence showed that Rh metal detected was from catalyzed changer in vehicles
Antifungal properties of cassava starch edible film incorporated with lemongrass essential oil YULIA ANNISA; ISMAIL SULAIMAN; NOVI SAFRIANI; M. DANI SUPARDAN
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 1 (2014): Engineering
Publisher : Syiah Kuala University

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Abstract

The aim of this study was to evaluate the antifungal properties of cassava edible film incorporated with lemongrass essential oil against two strains of fungal, Trichoderma sp and Penicillium sp. Edible films were prepared from a mixture of cassava starch and glycerol. Lemongrass oil (0.5%, 1%, 2%, 3% and 4% w/w) was added to edible films as natural antifungal agent. The agar disc diffusion method was used to determine the antifungal activity of cassava starch edible film. Antifungal behaviour was determined by the mold absences upon the film and by the inhibition zone formed. The experimental results showed that Trichoderma sp and Penicillium sp was not appear above the film until the fourth day. However, cassava starch edible films containing lemongrass oil did form any inhibition zone toward both of fungal

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