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Geotechnical Parameter Assessment for Tall Building Foundation Design
Poulos, Harry G.,Badelow, Frances Council on Tall Building and Urban Habitat Korea 2015 International journal of high-rise buildings Vol.4 No.4
This paper discusses the design parameters that are required for the design of high-rise building foundations, and suggests that the method of assessment for these parameters should be consistent with the level of complexity involved for various stages in the design process. Requirements for effective ground investigation are discussed, together with relevant in-situ and laboratory test techniques for deriving the necessary strength and stiffness parameters. Some empirical correlations are also presented to assist in the early stages of design, and to act as a check for parameters that are deduced from more detailed testing. Pile load testing is then discussed and a method of interpreting bi-directional tests to obtain pile design parameters is outlined. Examples of the application of the assessment process are described, including high-rise projects in Dubai and Saudi Arabia.
Psychosocial Factors and Injury Risk in Taekwondo: An Exploratory Prospective Cohort Study
( Reidar P. Lystad ),( Petra L. Graham ),( Roslyn G. Poulos ) 국제태권도학회 2015 Journal of the International Association for Taekw Vol.2 No.1
The purpose of this study was to examine the psychological profile of Taekwondo athletes competing at the 2011 Australian National Championships and to explore the potential relationship between psychosocial variables and injury risk. Forty-five athletes aged 16 years and older consented to complete a pre-tournament survey comprising demographic information and a battery of questionnaires designed to quantify four separate psychosocial factors (i.e., life-changing events, competition anxiety, coping skills, and social support). Older athletes had significantly lower competition anxiety (p = 0.035) and greater satisfaction with social support (p = 0.019) relative to younger athletes. Female athletes reported significantly fewer positive life events (p = 0.039) compared to their male counterparts. These findings indicate that younger or inexperienced athletes and females may be at greater risk from psychosocial stressors. Targeted programs to address these stressors may be beneficial; however, further research is needed to elucidate the relationships between injury risk and psychosocial factors in Taekwondo athletes.
Poulose, Anesh Manjaly,Elnour, Ahmed Yagoub,Anis, Arfat,Shaikh, Hamid,Al-Zahrani, S.M.,George, Justin,Al-Wabel, Mohammad I.,Usman, Adel R.,Ok, Yong Sik,Tsang, Daniel C.W.,Sarmah, Ajit K. Elsevier 2018 The Science of the total environment Vol.619 No.-
<P><B>Abstract</B></P> <P>The application of biochar (BC) as a filler in polymers can be viewed as a sustainable approach that incorporates pyrolysed waste based value-added material and simultaneously mitigate bio-waste in a smart way. The overarching aim of this work was to investigate the electrical, mechanical, thermal and rheological properties of biocomposite developed by utilizing date palm waste-derived BC for the reinforcing of polypropylene (PP) matrix. Date palm waste derived BC prepared at (700 and 900°C) were blended at different proportions with polypropylene and the resultant composites (BC/PP) were characterized using an array of techniques (scanning electron microscope, energy-dispersive X-ray spectroscopy and Fourier transform infra-red spectroscopy). Additionally the thermal, mechanical, electrical and rheological properties of the BC/PP composites were evaluated at different loading of BC content (from 0 to15% w/w). The mechanical properties of BC/PP composites showed an improvement in the tensile modulus while that of electrical characterization revealed an enhanced electrical conductivity with increased BC loading. Although the BC incorporation into the PP matrix has significantly reduced the total crystallinity of the resulted composites, however; a positive effect on the crystallization temperature (T<SUB>c</SUB>) was observed. The rheological characterization of BC/PP composites revealed that the addition of BC had minimal effect on the storage modulus (G′) compared to the neat (PP).</P> <P><B>Highlights</B></P> <P> <UL> <LI> Date palm waste derived biochar was used as filler for polymer composites' applications. </LI> <LI> Biochar/polypropylene (BC/PP) composites' properties such as electrical, mechanical, thermal and rheological were investigated. </LI> <LI> The BC/PP composites' surface resistivity was decreased by four orders of magnitude. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>