Asian Transactions on Engineering

Volume: 03, Issue: 03, July 2013
ISSN 2221-4267


Title: Determining the Optimal Sitting Position and Analyze Loads in Body
Author(s): Fikret Veljovic, Fahira Veljovic fizijatar, Nusreta Mulic – Adilovic medicine rada
Paper ID: ATE-50222066
Pages: 1 - 10
Abstract: Analyze loads in body at 5 different positions of backrest and analyze influence of legs rest at loads in body. Provide char models which satisfy results of analyze and main ergonomic criteria's.

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Title: Mathematical Modeling of Weft yarn Tension in Pirn Winding
Author(s): EASK Fernando, TSS Jayawardana
Paper ID: ATE-40310035
Pages: 11 - 17
Abstract: Pirn winding is an operation of winding yarn from supply yarn package onto pirns which are used for shuttle weft insertion. Firm and coherent winding tension is required to maintain in the pirn winding process to withstand the high forces produced by the deceleration of the shuttle at the end of each pick and to avoid permanent strains in yarns which will appears as fabric defects in weaving. The package size and its diameter vary due to subsequent winding of pirns. Hence the balloon effect varies and caused to change the thread tension at the winding point of the pirn. The thread tension variation is considerably significant from the first pirn wound from a package to the last pirn wound from the same if no tension controlling mechanism is devised. Placing dead weights on the disc tension controller which adds a tension to take off tension may help to compensate the yarn tension variation to some extent to combat with this problem. However, this is a stepwise manual compensation technique which needs the correct timing of compensation to avoid significant tension variations in pirn windings. The author attempted to theoretically analyze the tension variation in the yarn path of the pirn winding machine and theoretically model the tension variation with and without deadweight placement on the tensioners. Author also verified the accuracy and the validity of the model developed through the experimental results obtained at different locations along the yarn path

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Title: UTILIZATION OF GUM ARABIC TO IMPROVE WASTE MATERIALS USES IN CONCRETE
Author(s): Zainab Hasan Abdulabbas
Paper ID: ATE-90302030
Pages: 18 - 23
Abstract: This study aims to reveal the influence of Gum Arabic and waste materials on concrete properties. The waste materials comprised metal cans and bottles caps of juices and soft drinks. The waste materials was used in two manners; the first, it was used as fibers and was added with 15% by weight of cement. The second, it was used with 25% as a replacement of coarse aggregate volume. Gum Arabic was dissolved in water to use it in liquid state. The dosage of Gum Arabic was specified by using slump test. The properties of concrete specimens were evaluated by measuring compressive strength, flexural strength, splitting tensile strength, absorption percent, density, and ultrasonic pulse velocity. The using of bottles caps as waste materials fibers in concrete increased compressive strength, flexural strength, and splitting tensile strength. While the using of walls of cans as waste materials fibers in concrete decreased them. When compacted bottles caps and pull-tab of cans was used as a replacement of coarse aggregate volume in concrete, the mechanical properties of concrete slightly less than reference mix and they were improved by using Gum Arabic. The using of Gum Arabic in liquid state in concrete mixes improved compressive strength, flexural strength, splitting tensile strength, decreased segregation, increased the absorption percent and decreased the density of concrete.

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