Isabel Graça, Tomás Seixas, Alberto C. Ferro and Mafalda Guedes
The reliable performance of critical components working under extreme conditions is paramount to the safe operation of aircraft, and material selection is critical. Copper alloys…
Abstract
Purpose
The reliable performance of critical components working under extreme conditions is paramount to the safe operation of aircraft, and material selection is critical. Copper alloys are an obvious choice for such applications whenever a combination of transport, mechanical and tribological properties is required. However, low strength and hardness issues require development of new copper alloys and composites to improve service life and reliability. This study aims to investigate the effect of carbon nanotubes as reinforcement phase in copper-matrix composites.
Design/methodology/approach
The development of novel copper-based composites refined to the nanoscale was envisaged through mechanical milling of mixtures containing copper and carbon nanotubes (2 Wt.%). Milling took place in a planetary ball mill for times varying between 1 h and 16 h at 400 rpm. A ball-to-powder ratio of 20:1 and alumina vial and copper spheres were used under dry conditions or with addition of isopropyl alcohol. Scanning electron microscopy/energy dispersive spectroscopy, size distribution, Raman spectroscopy and X-ray diffraction were used to study the produced powders.
Findings
Attained results show that mechanical milling of the studied system produces nanostructured powders containing second-phase carbon nanotubes homogeneously distributed in the metallic matrix, together with severe copper grain refinement. This should correspond to increased residual microstresses, envisaging significant improvement of mechanical properties of the produced copper composites.
Originality/value
The novelty of the work resides in the use of carbon nanotubes for the reinforcement of copper, and on the systematic microstructural characterisation of the produced composites.
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Darlene H. Anderson, Michelle Marchant and Nancy Y. Somarriba
ABA has been described as a precise psychological approach to the study of behavior (Bailey & Burch, 2002), involving well-defined principles that can be used in the analysis and…
Abstract
ABA has been described as a precise psychological approach to the study of behavior (Bailey & Burch, 2002), involving well-defined principles that can be used in the analysis and modification of individual behavior (Miltenberger, 1997). Special education, on the contrary, has been characterized as “a customized instructional program designed to meet the unique needs of the individual learner” (Gargiulo, 2009, p. 9). Certainly the two disciplines have much in common; indeed, ABA specifically addresses issues at the focal point of IDEA. For instance, ABA's stance on the right to effective behavioral treatment (Van Houten et al., 1988) is similar to special education regulations regarding the right to an appropriate public education and the right to be educated in the least restrictive environment.
Mickey Losinski and Robin Parks Ennis
Repetitive and restrictive behaviors are one of the core components of diagnosing a child with an autism spectrum disorder. These behaviors may take the form of repetitive motor…
Abstract
Repetitive and restrictive behaviors are one of the core components of diagnosing a child with an autism spectrum disorder. These behaviors may take the form of repetitive motor movements or vocalizations, often referred to as stereotypical behaviors. These behaviors can impede the child’s educational and social opportunities, and have thus become a target for intervention. A variety of interventions have been used to reduce stereotypical behaviors with varied success. One of the most oft-used interventions is deep pressure therapy (e.g., weighted vests), a practice that enjoys substantial anecdotal but little empirical support. Conversely, interventions based on functional behavior assessment (FBA) have been shown to reduce these behaviors, but may not be used frequently within schools. Therefore, this chapter will provide a brief overview of stereotypical behaviors and compare these two intervention approaches, with a clear preference for FBA-based interventions due to their stronger empirical support.
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Investigates the differences in protocols between arbitral tribunals and courts, with particular emphasis on US, Greek and English law. Gives examples of each country and its way…
Abstract
Investigates the differences in protocols between arbitral tribunals and courts, with particular emphasis on US, Greek and English law. Gives examples of each country and its way of using the law in specific circumstances, and shows the variations therein. Sums up that arbitration is much the better way to gok as it avoids delays and expenses, plus the vexation/frustration of normal litigation. Concludes that the US and Greek constitutions and common law tradition in England appear to allow involved parties to choose their own judge, who can thus be an arbitrator. Discusses e‐commerce and speculates on this for the future.
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Costanza Nosi, Alberto Mattiacci and Fabiola Sfodera
The purpose of this paper is to investigate how grape varieties are narrated online by non-winery-owned sources in four countries: Australia, Canada the UK and the USA. This study…
Abstract
Purpose
The purpose of this paper is to investigate how grape varieties are narrated online by non-winery-owned sources in four countries: Australia, Canada the UK and the USA. This study focuses on Sangiovese, the most important varietal of Italy.
Design/methodology/approach
Texts collected on the Internet underwent a software-assisted semantic clustering procedure based on text-mining techniques. Identified clusters were then qualitatively analyzed by content.
Findings
The digital narrative on Sangiovese is mainly technical and conveyed by adopting a professional slant that is suitable for knowledgeable consumers but less effective for common and unexperienced wine drinkers. Online information is concentrated in few websites that act as information gatekeepers.
Research limitations/implications
The study contributes to the wine-related managerial literature on grape varieties, which are considered one of the most powerful factors in addressing consumer wine choice. Additionally, the investigation sheds light on the online wine ecosystem, by providing insights on how information is provided and the contents that are conveyed on the Internet. The findings of this study may be useful for Italian operators willing to promote Sangiovese-based wines in foreign markets.
Originality/value
Though explorative in nature, this study represents one of the first attempts to investigate the online narrative of grape varieties by presenting a marketing perspective and examining the characteristics of non-winery-owned online information which may shape wine consumers’ behavior.
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This paper presents the second-generation estimates for the Italian engineering industry in 1911, a year documented both by the customary demographic census, and the first…
Abstract
This paper presents the second-generation estimates for the Italian engineering industry in 1911, a year documented both by the customary demographic census, and the first industrial census. The first part of this paper uses the census data to estimate the industry’s value added, sector by sector; the second further disaggregates each sector by activity, and estimates the value added, employment, physical product, and metal consumption of each one. A third, concluding section dwells on the dependence of cross-section estimates on time-series evidence. Three appendices detail the specific algorithms that generate the present estimates; a fourth, a useful sample of firm-specific data.
Examines the tenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects…
Abstract
Examines the tenth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.
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Examines the ninth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects…
Abstract
Examines the ninth published year of the ITCRR. Runs the whole gamut of textile innovation, research and testing, some of which investigates hitherto untouched aspects. Subjects discussed include cotton fabric processing, asbestos substitutes, textile adjuncts to cardiovascular surgery, wet textile processes, hand evaluation, nanotechnology, thermoplastic composites, robotic ironing, protective clothing (agricultural and industrial), ecological aspects of fibre properties – to name but a few! There would appear to be no limit to the future potential for textile applications.