Mobilizing the Vietnamese Body: Dance Theory, Critical Refugee Studies, and the Aftermaths of War in Andrew X. Pham’s Catfish and Mandala

Mobilizing the Vietnamese Body: Dance Theory, Critical Refugee Studies, and the Aftermaths of War in Andrew X. Pham’s Catfish and Mandala Through analysis of Andrew X. Pham’s Catfish and Mandala: A Two-Wheeled Voyage through the Landscape and Memory of Vietnam, this collaboration between a literary scholar and dance scholar joins methodologies from their respective fields to explore the politicized dimensions of the Vietnamese body-in-motion. Published in 1999, Pham\u27s memoir documents his journey, as a Vietnamese refugee living in the U.S., as he travels throughout Vietnam on a bicycle. We argue that through the literal and theoretical mobilization of his body, Catfish and Mandala constitutes a choreographic text that animates the Vietnamese body as making meaning within and beyond post-Vietnam war geopolitical formations. As such the text productively critiques the dyad of resistance and accommodation that have long structured and haunted critical inquiries into power

Corrosion of Carbon Steel in Artificial Geothermal Brine: Influence of Carbon Dioxide at 70 °C and 150 °C

This study focuses on the corrosion mechanism of carbon steel exposed to an artificial geothermal brine influenced by carbon dioxide (CO2) gas. The tested brine simulates a geothermal source in Sibayak, Indonesia, containing 1500 mg/L of Cl−, 20 mg/L of SO42−, and 15 mg/L of HCO3− with pH 4. To reveal the temperature effect on the corrosion behavior of carbon steel, exposure and electrochemical tests were carried out at 70 °C and 150 °C. Surface analysis of corroded specimens showed localized corrosion at both temperatures, despite the formation of corrosion products on the surface. After 7 days at 150 °C, SEM images showed the formation of an adherent, dense, and crystalline FeCO3 layer. Whereas at 70 °C, the corrosion products consisted of chukanovite (Fe2(OH)2CO3) and siderite (FeCO3), which are less dense and less protective than that at 150 °C. Control experiments under Ar-environment were used to investigate the corrosive effect of CO2. Free corrosion potential (Ecorr) and electrochemical impedance spectroscopy (EIS) confirm that at both temperatures, the corrosive effect of CO2 was more significant compared to that measured in the Ar-containing solution. In terms of temperature effect, carbon steel remained active at 70 °C, while at 150 °C, it became passive due to the FeCO3 formation. These results suggest that carbon steel is more susceptible to corrosion at the near ground surface of a geothermal well, whereas at a deeper well with a higher temperature, there is a possible risk of scaling (FeCO3 layer). A longer exposure test at 150 °C with a stagnant solution for 28 days, however, showed the unstable FeCO3 layer and therefore a deeper localized corrosion compared to that of seven-day exposed specimens

Removal of malachite green oxalate from aqueous solution using sawdust as a biosorbent

Dyes are using in many industries such as textile, paper and ink, printing, pharmaceuticals, food industries…. They are highly visible contaminants and often toxic. Many dyes are stable to light and difficult to degrade, hence contaminants due to dyes pose to not only public health concern but also environmental problems. Due to the toxic nature of most dyes to human, plants and micro-organisms, colored waste water cannot be discharged without adequate treatment. Many methods to remove dye from industrial waste water are used such as biodegradation, coagulation-flocculation, adsorption, ozone treatment…. These methods are either not efficient or expensive. This study deals with low cost, locally available bio-sorbents. The literatures are reviewed using rich sources of information from library books, special journals and papers and internet. By studying the references, the methodology to study potential of using biosorbents to remove Malachite Green Oxalate has been come out. There are four main experiments will be conducted including factors influence dye biosorption, equilibrium test, kinetic study and effect of different forms of sorbent on biosorption of dye. The project can be the solution for current issue not only on colored waste water but also solid waste disposal. Since the bio-materials used are the waste from industries and agriculture. Furthermore, the result of this project can be used as reference for further study on biosorption using other types of biomaterial

Influence of semi-trailer truck operating conditions on road surface friendliness

In order to analyze the influence of semi-trailer truck operating conditions on road surface, a three-dimensional vehicle-pavement coupled model with 14 degrees of freedom is established for simulation and calculation. The influence of the different vehicle operating conditions on the dynamic tire loads, dynamic load coefficient (DLC) and road-friendliness which include road surfaces, vehicle speeds, vehicle loads are analyzed in this study. The results shown that the influence of the road surface roughness and vehicle loads on the tire dynamic load coefficient as well as road-friendliness is very obvious. Especially, the DLC values of the 3rd axle increase from 23.97 %, and 34.88 % when vehicle moves on three different road conditions with a velocity of 20 m/s and fully loaded. Finally, this study result gives the road-friendly limit of driving speed for 5-axle semi-trailer truck when vehicle operates under the different conditions

Comparing the performance of suspension system of semi-trailer truck with two air suspension systems

In order to compare the performance of heavy truck suspension system, a 3D dynamic model with 14 degrees of freedom is developed with the dynamic models of the traditional and new air suspension systems to compare the performance of the air suspension systems for reducing the negative impacts on the road surface when vehicle moves on the different road conditions. Dynamic modes of two different types of the air suspension systems are respectively established and a dynamic load coefficient (DLC) is chosen as objective function which uses Matlab/Simulink software to simulate and determine the values of objective function. The results shown that the performance of the new air suspension system is better than the tradition air suspension for reducing the negative impact on road surface under the different operating conditions of vehicle. Especially, the DLC values of wheels at 3rd axle of vehicle with the new air suspension system are respectively reduced by 6.7 %, 7.0 %, 7.4 %, 7.7 % and 8.5 % in comparison with the traditional air suspension system when vehicle moves on the different pavement conditions a velocity of 20 m/s and fully loaded. In addition, the study results not only can provide a reference for designers but also traffic management to reduce the negative impact on road surface