Asian Transactions on Engineering

Volume: 01, Issue: 04, September 2011
ISSN 2221-4267


Title: Effect of molybdenum on the intercritical heat-affected zone of the low carbon Cr-Mo steels
Authors: Mehtap MURATOGLU, Mehmet EROGLU
Paper ID: ATE-40126045
Pages: 1-5
Abstract: In the present study, the effect of molybdenum with a content of 0.8 wt % chromium on the microstructure and hardness of intercritical heat-affected zone (HAZ) of a low carbon Cr-Mo steel were investigated. Low carbon steel specimens containing 0.4, 0.8, 1.4, 1.8 and 2.3 wt % Mo were welded using a submerged arc welding process with the heat inputs of 0.5, 1 and 2 kJ mm-1. After welding, microstructure and hardness of the intercritical HAZs were investigated. From the microstructural observations, for a heat input of 0.5 kJ mm-1 it was seen that 0.4 wt % molybdenum was effective on the formation of bainite with martensite and greater values of that encouraged the formation of martensite producing higher content hardness values. As the heat input increased to 1 kJ mm-1, it was seen that 0.8 wt % molybdenum and higher values of that were effective on the formation of bainite and martensite. However, bainite and martensite did not appear for the low molybdenum contents with the heat input of 2 kJ mm-1.

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Title: Assessment to the Soil-Structure Resonance Using Microtremor Analysis on Pare East Java, Indonesia
Authors: Dwa Desa Warnana, Triwulan, Sungkono, Widya Utama
Paper ID: ATE-50102046
Pages: 6-12
Abstract: The determination of seismic hazard, oriented to seismic risk management in urban areas, particularly on Pare – East java, force us to know the resonance range between the dynamic behavior of ground and the one of building structures. Since no major damaging earthquake has occurred in site in recent times, the presence of soil–structure interaction effects from observed damage pattern are not available. In order to assess the soil-structure resonance for this site study, the microtremor measurements was applied. Microtremor measurements were performed 6 free-field and inside 6 buildings of various heights. We focused on important public buildings (i.e. schools and mosque). The Horizontal-to-Vertical Spectral ratio (HVSR) analysis was applied in order to access the fundamental frequencies of the sediments, beside the longitudinal (EW) and transverse (NS) fundamental frequencies of each building determined from amplitude spectra and the Floor Spectral Ratio (FSR). When one of these frequencies is close to a nearby free-field fundamental frequency, a potential soil-structure resonance is present. Among 6 buildings with established frequencies we found two buildings with low, one with medium to high and three building with high danger of soil-structure resonance. This study shows that the microtremor method could be used to make preliminary assessment of soil-structure resonance.

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Title: Model Design of Adaptive Production Planning and Inventory Control (PPIC) in the Food Industry
Authors: Iveline Anne Marie , Eriyatno , Yandra Arkeman , Dadan Umar Daihani
Paper ID: ATE-70109048
Pages: 13-22
Abstract: Raw materials for the food processing industries include plant, animal and marine products, packaging materials, food ingredients and food chemicals. Major food companies produce large quantities of semi-processed and consumer food products in continuous-flow operations, that must be utilized. The conventional PPIC Model cannot anticipate unpredictable problems and handle disturbances occurred in their production systems effectively. Thus, the objectives of this research are to develop a PPIC Model, which is suitable for food industry, and propose Disturbance Models to increase the PPIC function in order to control disturbances occurred in the production system. The developing PPIC models for food industry including Demand Management by Artificial Neural Network, Master Production Scheduling by Fuzzy Multi Objectives Linear Programming, Raw Material Inventory Planning by EOQp, Raw Material Inventory Control by Continuous Probabilistic Review System by Reorder Point, Material Requirement Planning for Production, Scheduling by Flow Shop Scheduling Genetic Algorithm and Distribution Routing by Travelling Salesman Problem Genetic Algorithm (TSPGA). Whereas, the Disturbances Control Model incorporating Operational Disturbances Control Model and Variance Model. The disturbances models can help in controlling the disturbances occurred and updating the % Loss Raw Material and % Loss Finished Good to adapt the PPIC System

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Title: Effect of hydraulic retention time and influent substrate concentration on nutrient removal and membrane fouling in an anoxic/anaerobic-aerobic MBR
Authors: Zubair Ahmed
Paper ID: ATE-80120049
Pages: 23-35
Abstract: In this study, effects of organic loading rates on biological nutrient removal and in an MBR based nutrient removal system were investigated. Furthermore, trans-membrane pressure at different applied conditions was monitored to observe impact on membrane fouling Three different levels of CODinf and three HRTs (4, 5 & 8 hrs) were applied. An improved performance with 74 % & 89% of TN & TP removal respectively was observed when the SAM was fed with high CODinf. When the MBR based BNR process was operated at relatively higher influent COD and at short HRT, efficient TN and TP removal efficiencies were observed at stable TMP variation throughout the test. The membrane fouling was accelerated at short HRT but suppressed when concentration of CODinf was increased. The optimum specific organic loading rate was found to be 0.3 kg COD•kg-1 MLVSS•day for the MBR based BNR system.

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Title: Effect of sand impact on the erosion behaviour of HDPE 100 and PVC pipes
Authors: Shawnim R. Jalal
Paper ID: ATE-90121040
Pages: 36-42
Abstract: Experimental were carried out to study the effect of sand impact on the erosion behaviour of HDPE 100 and PVC pipes. The erosion wear is evaluated at different impingement angles (30, 45, 60, 90) degree at two different velocity (34m/sec and 109 m/sec). The erodent used is silica sand with the size rang 200-600 µm of irregular shape. The result shows the same brittle behavior with maximum erosion rate at 90 degree impingement angle for both pipes and the erosion rate increased with increasing the size of the sand particles and reduced with increasing distance traveled by the jet or particles.

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Title: ALTERATION OF OIL-BASED DRILLING MUD PROPERTIES DUE TO CONTACT WITH CO2 GAS KICK DURING DRILLING
Authors: Adebayo Thomas A, Balogun Omotola, Igweze Augusta, Harrison Oluwaseyi
Paper ID: ATE-10113042
Pages: 43-47
Abstract: There is a possibility of CO 2 leakage from the storage reservoir during carbon sequestration and storage (CSS) process and this may lead to kick in nearby reservoir being drilled. The CO 2 kick, when it comes into contact with the drilling mud, will tend to alter the properties of the drilling mud. The alteration in the properties of the drilling mud could result into failure of the drilling programme. This experimental research work studied the effect of CO 2 kick on the properties of oil-based (water-in-oil emulsion) mud. It was observed that CO 2 contamination of the water-in-oil drilling mud resulted into 3.45% increase in the density of the mud and 96.98% increase in the yield strength within the first eight days of contamination. It also led to 82.79% increase in the viscosity of the mud within the first 5 days of contamination and a further 18.55% within the next 3 days of contamination. Within the 8th day and the 16th day of mud contamination with CO 2 there was a further increase in density, viscosity and yield strength of the water-in-oil based mud. The rate of increase was less than the preceding days with 18.02% increases in viscosity; 17.48% increase in yield streght and a 3.44% in mud density. This shows that the critical stage in the contamination was the first 8days of mud application after contamination with CO 2 . Though, there was negligible increase in the mud density, which is easily manageable, but there was drastic increase in the viscosity and the yield strength which greatly altered the effectiveness of the mud as the mud becomes too viscous.Experimental were carried out to study the effect of sand impact on the erosion behaviour of HDPE 100 and PVC pipes. The erosion wear is evaluated at different impingement angles (30, 45, 60, 90) degree at two different velocity (34m/sec and 109 m/sec). The erodent used is silica sand with the size rang 200-600 µm of irregular shape. The result shows the same brittle behavior with maximum erosion rate at 90 degree impingement angle for both pipes and the erosion rate increased with increasing the size of the sand particles and reduced with increasing distance traveled by the jet or particles.

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Title: APPLYING INFORMATION TECHNOLOGIES IN MEASURING THE CHANGING QUALITY OF LIFE: "FROM NOMAD TO URBANISM"
Authors: O. M. Amireh
Paper ID: ATE-20114043
Pages: 48-54
Abstract: Integrating advanced and modern surveying systems using information technologies with conventional urban surveying systems on conventional communities raises some crucial questions; what are the possibilities of bringing modern technology and conventional communities together? Which of them needs to change? To modernize the communities or to conventionalize the technology, Tackling the above issue is being examined in the semi urban, originally nomad community at Al-Huseiniah, Ma`an, South of Jordan. It is obvious that under the current circumstances, that the pace and trend of change in both systems is taking a different direction.

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