Naresuan University Journal
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Rethinking Intersectionality and Whiteness at the borders of citizenship
No full textThis article critically engages with the concept of intersectionality, beginning with an account of its roots in Black feminist' theorizing and critical legal studies. The article argues that it is important to understand the origin and roots of the term in order to track its radical potential. Whilst intersectionality as a concept has been perhaps one of feminism's most successful exports, the article also considers some of the potential pitfalls in the widespread usage of the language. It asks: has intersectionality lost something in its travelling and re-interpretation? The article argues that there is a risk that intersectionality has, in some contexts of its usage, lost its critical, anti-racist and feminist edge. Considering the campaigns against changes in the spousal visa regulations in Britain, the article tracks the production of whiteness and of citizens and non-citizens in Britain. This example is used to argue for the maintenance of a more flexible and complex range of vocabularies with which to examine exclusion and oppression
The nature and neural correlates of semantic association versus conceptual similarity
No full textThe ability to represent concepts and the relationships between them is critical to human cognition. How does the brain code relationships between items that share basic conceptual properties (e.g., dog and wolf) while simultaneously representing associative links between dissimilar items that co-occur in particular contexts (e.g., dog and bone)? To clarify the neural bases of these semantic components in neurologically intact participants, both types of semantic relationship were investigated in an fMRI study optimized for anterior temporal lobe (ATL) coverage. The clear principal finding was that the same core semantic network (ATL, superior temporal sulcus, ventral prefrontal cortex) was equivalently engaged when participants made semantic judgments on the basis of association or conceptual similarity. Direct comparisons revealed small, weaker differences for conceptual similarity > associative decisions (e.g., inferior prefrontal cortex) and associative > conceptual similarity (e.g., ventral parietal cortex) which appear to reflect graded differences in task difficulty. Indeed, once reaction time was entered as a covariate into the analysis, no associative versus category differences remained. The paper concludes with a discussion of how categorical/feature-based and associative relationships might be represented within a single, unified semantic system
Progress towards non-intrusive optical measurement of gas turbine exhaust species distributions
No full textWe report on the development of three systems intended to provide fast, non-intrusive measurement of cross-sectional distributions of pollutant species within gas turbine exhaust flows, during ground-based testing. This research is motivated by the need for measurement systems to support the introduction of technologies for reducing the environmental impact of civil aviation. Tomographic techniques will allow estimation of the distributions of CO2, unburnt hydrocarbons (UHC), and soot, without obstruction of the exhaust, bypass or entrained flows, from measurements made in a plane immediately aft of the engine
Measurement of the -jet and -jet differential production cross sections in collisions at TeV
No full textHistory and practitioners: the use of history by humanitarians and potential benefits of history to the humanitarian sector
No full textA Hybrid Organic-Inorganic Molecular Daisy Chain
No full textA hybrid organic-inorganic molecular daisy chain has been synthesised in one pot reaction. The molecule contains two {Cr6Zn2} rings linked through an organic molecule that acts as both template and ligand. Magnetic and spectroscopic data reveal themagnetic complexity of the daisy chain, which can be casted to two magnetic isomers through comparison of experimental and simulated data for Cr(III) chains
Electrospun sodium alginate/polyethylene oxide fibers and nano-coated yarns
No full textSodium alginate (NaAlg), as a natural biopolymer, was electrospun from aqueous solution via blending with a bio-friendly synthetic polymer polyethylene oxide. The morphology and chemical properties of resultant alginate-based nanofibers were characterized by using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), powder X-ray diffractometer (PXRD) and differential scanning calorimetry (DSC). At a wide voltage window (i.e. 12-24 kV), smooth and uniform nanofibers were obtained from the 5.0% concentration with the NaAlg/PEO ratio ranging from 1:1 to 1:3. The results from FTIR, PXRD and DSC demonstrate that molecular interaction exists between these two polymers and therefore contributes to the alteration of crystallinity of electrospun fibers. In addition, NaAlg/PEO nanofiber coated polylactic acid (PLA) yarns with different twist levels were also fabricated in this work. The results show that the tensile strength of the nano-coated hybrid yarn and the uncoated yarn increase with the twist per centimeter (TPC) up to 0.5 but decrease when TPC is further increased. The tensile properties of hybrid yarn are superior to those of the uncoated yarn
Composite Repair in Wind Turbine Blades: An Overview
No full textRenewable energy sources such as wind energy-together with energy-efficient technologies-are essential to meet global energy demands and address climate change. Fiber-reinforced polymer composites, with their superior structural properties (e.g., high stiffness-to-weight) that allow lightweight and robust designs, play a significant part in the design and manufacture of modern wind turbines, especially turbine blades, for demanding service conditions. However, with the current global growth in onshore/offshore wind farm installations (with total global capacity of similar to 282GW by the end of 2012) and trend in wind turbine design (similar to 7-8MW turbine capacity with similar to 70-80m blade length for offshore installations), one of the challenges that the wind energy industry faces with composite turbine blades is the aspect of structural maintenance and repair. Although wind turbines are typically designed for a service life of about 20 years, robust structural maintenance and repair procedures are essential to ensure the structural integrity of wind turbines and prevent catastrophic failures. Wind blades are damaged due to demanding mechanical loads (e.g., static and fatigue), environmental conditions (e.g., temperature and humidity) and also manufacturing defects. If material damage is not extensive, structural repair is the only viable option to restore strength since replacing the entire blade is not cost-effective, especially for larger blades. Composite repairs (e.g., external and scarf patches) can be used to restore damaged laminate/sandwich regions in wind blades. With composite materials in the spar (similar to 30-80mm thick glass/carbon fiber laminates) and aerodynamic shells (sandwich sections with thin glass fiber skins and thick foam/wood as core), it is important to have reliable and cost-effective structural repair procedures to restore damaged wind blades. However, compared to aerospace bonded repairs, structural repair procedures in wind blades are not as well developed and thus face several challenges. In this regard, the area of composite repair in wind blades is broadly reviewed to provide an overview as well as identify associated challenges