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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 40 Documents
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Search results for , issue "Vol 2, No 2 (2012): Engineering" : 40 Documents clear
Mechanism of cavitation-induced atomization in two-dimensional nozzles Muhammad Ilham Maulana; . Jalaluddin
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

It has been pointed out that cavitation, i.e., super cavitation regime may occur in a nozzle of pressure atomizers, and may influence atomization of a liquid jet discharged from the 2D nozzle. Once we clarify the mechanism of atomization induced by the supercavitation, we will be able to develop new atomizers in which the atomization mechanism is utilized more efficiently. Hence, this study has been conducted to clarify the mechanism in the 2D nozzle. As a result, the following conclusions are obtained: (1) The frequency of the shedding and collapse of cavitation clouds in the supercavitation regime agrees with that of strong turbulence near the exit; (2) When the trace of a cavitation cloud comes out of the 2D nozzle, a ligament is formed at the liquid jet interface; (3) Strong turbulence is produced by the collapse of cavitation clouds near the exit of the 2D nozzle.and induces ligament formation, which, in turn, causes liquid jet atomization.
Composites Prepared from Rice Husk and Recycled/Virgin HDPE with Addition of CouplingAgent Farid Mulana
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Compositesweremade from recycled HDPE and virgin HDPE as matrix and ricehusk as filler and also added with polyethylene-graft-maleic anhydride (MAPE) as a coupling agent to improve the physical and mechanical properties of composites. Theaim of study is to find the optimum condition of the type of used matrixs and the percentage of added coupling agent on the quality of the producedcomposites. Compositeswere prepared byhot press method. Hot press process was performed at a temperature of 150 oC for 30 minutes.After cooling to room temperature, the product was tested oftensile strength, bending strength, thermal test and FTIR. The results show thatcompositesprepared byvirgin HDPE have much betterphysical and mechanical properties compared to composites prepared by recycled HDPE. The highest tensile strength valueof 5.69 MPawas foundon composite withmatrix of virgin HDPE and addition of 4 wt% MAPE. While the highest bending strength valueof 0.35 Mpa was obtained oncomposite with matrix of recycled HDPE and addition of 2 wt% MAPE. The presence of a number of MAPE concentration in the mixture resulted in increased adhesion properties between rice husk and HDPE thereby increasing the physical mechanical properties of composites.
Finite Element Modelling of Unreinforced Masonry (URM) Wall with Openings: Studies in Australia . Meillyta
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Unreinforced Masonry (URM) wall is vulnerable in resisting horizontal load suchas wind and seismic loading. It is due to the low tensile strength of masonry, the mortar connection between the brick units. URM structures are still widely used in the world as an infill wall and commonly constructed with door and window openings. This research aimed to investigate the behaviour of URM wall with openings when horizontal load acting on it and developed load-drift relationship of the wall. The finite element (FE) method was chosen to numerically simulate the behaviour of URM with openings. In this research,ABAQUS, commercially available FE software with explicit solver was employed. In order to ensure the numerical model can accurately represent the behaviour of an URM wall, the model was validated for URM wall without openings using available experimental results. Load displacement relationship of numerical model is well agreed with experimental results. Evidence shows the same load displacement curve shape obtained from the FE model. After validating the model, parametric study conducted on URM wall with openings to investigatethe influence of area of openings and pre-compressive load on the horizontal load capacity of the wall. The result showed that the increasing of area of openings decrease the capacity of the wall in resisting horizontal loading. It is also well observed from the result that capacity of the wall increased with the increasing of pre-compressive load applied on the top of the walls.
Indoor Thermal Assessment of Post Tsunami-Housing in Banda Aceh, Indonesia Laina Hilma Sari
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

The purpose of the study is to see and evaluate the annual indoor thermalperformance of post tsunami housing in Banda Aceh, Indonesia by comparing the data with the annual inside thermal performance of unaffected existing house and Acehnese traditional house and the neutral temperatures in tropics. This study is approached by analysing the results of a field survey carried out using questionnaires, onsite measurements, and the relevant literatures. The further analysis in predicting the annual indoor thermal performance was conducted using TAS thermal analysis simulation software. The finding show that there is no significant difference in inside air temperature between thepost-tsunami housing and the unaffected existing housing (except traditional Acehnese houses). This study performs the actual indoor thermal performance in the post tsunami housing for couple of days and the predicted annual data of the houses simulated using TAS software. This information is valuable for both the government and Non-Governmental Organizations who carried out the post reconstruction programs in performing their „products‟ (donated houses) dealing with the long term local climate
Numerical Simulation for Scenario Based Volcanic Hazard Assessment (VHA) at Seulawah Agam Volcano, Aceh, Sumatra Muhammad Syukri; Amir Fauzi; . Fashbir; . Irwandi
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Seulawah Agam is an active volcano with high 1,810 m located at 5.448°N 95.658°E and close to the capital of Aceh province densely populated. Following Sumatra-Andaman earthquake 26 December 2004, Sumatra Island has increased not only seismicity but also volcanic activity. On the other hand, Sinabung volcano categorized as inactive volcano, but beyond expectations on the 3rd September 2010 experienced eruption and the closest volcanic eruption location to Seulawah Agam volcano. Meanwhile, in 1 September 2010, Seulawah Agam categorized as active volcano was alert to level 2. We cannot predict what happens in future to the Seulawah Agam volcano, but we can provide volcano hazard assessment as important step for mitigation procedure. This paper introduces numerical study for volcanic eruption and integrated with a GIS-based tool for volcanic hazard assessment VORIS (VOlcanic Risk Information System) which develop by Alicia Felpeto.  This model investigate scenario based volcanic eruption for ash fallout, PDC (pyroclastic density currents), and lava. Digital elevation model (DEM) from SRTM (Shuttle Radar Topography Mission), meteorological data from NOAA, and geological study are used in this model. In the statovolcano mountain four geothermal manifestations appeared, such as: Fumarol Simpago, crater Heutz, ground steam Ie-Jue, and hot spring Ie-Suum. In this numerical simulation, we consider the location as potential eruption vent to produce erupted material. Wind velocity data at 3rd January 2012 and 1 July 2012 above the summit is selected to represent wet and dry season condition for scenario based ash fallout. Further, the simulation show the ash fallout is possible to reach Banda Aceh and potentially disrupt flight at Sultan Iskandar Muda Air port. Lava flow simulations are only depending on topography data (DEM) and applying some parameter for maximum flow length 5 km. The Simulation resolution depend on DEM data (90m) which produce more precise then volcanic hazard map produce by Center of Volcanology and Geological Hazard Mitigation, Bandung (CVGHM) and more reasonable with topography slope of mountain at southern part and northern part. Furthermore, PDC simulations are conducted scenario for height eruption column (starting point of the flow) 20m dan 200m. The simulations show PDC can be reach longer location until Banda-Aceh Medan Highway compare then CVGHM map.  This preliminary research should be developed to apply high resolution DEM and using adequate method for estimation eruption parameters. This method will be potential to provide more precise volcano hazard assessment for others volcano in Indonesia
Analaysis of The Effect of Relative Humidity in The Eggs Incubator Mohd. Isa T. Ibrahim; Ahmad Syuhada; . Hamdani
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

This study aimed to verify the effect of relative humidity during incubation ofduck eggs in the incubator on the rate of decline in egg weight, hatching day old duck weight, length and hatching eggs energy difference duck. Duck eggs taken from the poultry business in Meunasah Krueng, water fence, Lambaro, Aceh Besar. Then each egg was placed in an incubator unit in the three experimental groups, namely low humidity (57/58% RH), intermediate humidity (67/68% RH) and high humidity (71/72% RH). Incubation process done manually with temperature 38 oC incubator. Eggs were coded X and O adjacent to facilitate marking a reversal in current twice a day. Primary data retrieval from the first day until the fifteenth day by weighing the eggs and using electronic scales. Changes in egg weight reduction on the fifteenth day following (10.666%), (3.853%) and (2.859%) for the treatment of low humidity, intermediate andhigh, then the day of hatching eggs weigh hatching day old duck also showed that the weight is also affected by incubation and humidity differences by ANOVA analysis it can be concluded that the changes in egg weight reduction greatly influence the hatching duck weight difference and the difference so long incubation energy hatching day old duckling have more energy at low humidity (57/58% RH).
Algorithm Development to Predict the Dynamic Characteristic of a Multi Rotor System Amir Zaki Mubarak
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Rotor systems have been widely used in mechanical applications in industry andeven in daily live equipments. The motion effects of the rotor in certain cases can cause discomfort to the user even can cause of failure to the system itself. Therefore the dynamic characteristic analysis of the system is very essential to be analysed in designing a rotor system. By the development of computer technology, the analysis can be straightforwardly performed through numeric method by utilizing existing computational software, i.e. MATLAB. Existing researchers have developed the algorithm to analyse the dynamiccharacteristic of Jeffcot rotor and dual rotor systems by using MATLAB. The objective of this research is to conduct further investigation in developing algorithm to predict the dynamic characteristic of a multi rotor system. The analysed rotor system consists of a rotor shaft and several disks. The analysis is conducted for a variation number of disk. The equation of motion of the system is derived based on the potential and kinetic energy of the system. Lagrange‟s equation is then applied to the equation of motion that it can be solvednumerically. Based on the equation of motion, a computational algorithm is then developed to determine the natural frequency of the rotor shaft which is the main objective of this research. The algorithm is developed and simulated in MATLAB. The simulation result is closed with theoretical analysis.
Wind Power Generator for Small Scale Fish Processing Unit at Coastal Area in Aceh, Indonesia . Hamdani; . Irwansyah
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

This paper presents a wind power technology used to generate electricity forsmall scale fish processing unit. The units consist of ice machines, green house solar dryer, fish smoke house and utilities. A 10 kW wind turbine system were installed in 2010 at Lancang Paru village, Pidie Jaya. Total number of energy required for small scale fish processing unit are calculated. Initial test shown that wind power generator able to produce maximum power of 5 kW at 4 m/s wind speed. This wind turbine is enough to provide electricity for small scale fish processing unit
Process design of patchouli oil distillation by varying operating conditions to increase yields of patchouli oil . Harunsyah; M. Yunus
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

Patchouli oil is part of the essential oils obtained from patchouli plants by distillation. Patchouli oil is widely used in industry as provider of aroma and flavour. Quality of patchouli oil is determined by its natural characteristics and foreign materials contain in the patchouli oil. The foreign materials contain in the patchouli oil can be damage the quality of patchouli oil. Aceh Province is the largest contribute in producing patchouli oil in Indonesia. Patchouli oil processing areas in the Aceh region, precisely in the North Aceh and South Aceh district. In generally farmer of patchouli in Aceh is traditional farmer and many of them not yet follow the best refine system. They do it base of previously experience. Refinery equipment that used from former drum that can be reaction with patchouli oil, with the result can to change chemistry structure of patchouli oil, so that the oil produced is dirty and has dark colour and does not meet the specified quality requirements). The main purpose of this research is to increase yield and the quality of patchouli oil by using of refinery equipment modification process to meet quality standards. In this research the former drum is replaced by stainless steel drum. Method of test quality and procedure of test quality same as standard method of SNI-06-2385-2006. The results showed that the using of refinery equipment (stainless steel drum) able to increase the yield and oil quality, especially in terms of colour, physicochemical properties and concentration of its main components and also meet the quality requirements of national standards
The Use of Membrane Cellulose from Nata as a Filter of Pliek U Oil . Faridah; . Elwina; . Nadia
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 2, No 2 (2012): Engineering
Publisher : Syiah Kuala University

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Abstract

The research has been carried out in the laboratory scale to create and assess the ability of membrane cellulose from nata. Nata was produced from coconut-water and nira aren with a ratio 100%: 0%, 0%:100% and 50%:50%, which fermented with the addition of sugar and without the addition of sugar. Acetobacter xylinumwas added in medium as starter. The fermentation process was be done at 5, 7 9 days. The objective of this research was to study the influence of membrane cellulose as filter for Pliek U oil. Pliek U oil was filtered through membrane cellulose. Pliek U oil which was resulted have a good quality than before. Where membrane cellulosehas been able to reduce Free Fatty Acid (FFA), the results showed that the use of membrane cellulose from nata significantly reducesFree Fatty Acid (FFA). The membrane cellulose from coconut-water and nira aren without the addition of sugarat 9 days was reduced Free Fatty Acid from 2,43 % to 1,2%. But for density and index bias of Pliek U oil does not reduced with using membrane cellulose

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