Search results

The purpose of this paper is to conduct a comparative analysis between a straight blade (SB) and a curved caudal-fin tidal turbine blade (CB) and to examine the aspects relating to geometry, turbulence modelling, non-dimensional forces lift and power coefficients.

The comparison utilises results obtained from a default horizontal axis tidal turbine with turbine models available from the literature. A computational design method was then developed and implemented for “horizontal axis tidal turbine blade”. Computational fluid dynamics (CFD) results for the blade design are presented in terms of lift coefficient distribution at mid-height blades, power coefficients and blade surface pressure distributions. Moving the CB back towards the SB ensures that the total blade height stays constant for all geometries. A 3D mesh independency study of a “straight blade horizontal axis tidal turbine blade” modelled using CFD was carried out. The grid convergence study was produced by employing two turbulence models, the standard k-ε model and shear stress transport (SST) in ANSYS CFX. Three parameters were investigated: mesh resolution, turbulence model, and power coefficient in the initial CFD, analysis.

It was found that the mesh resolution and the turbulence model affect the power coefficient results. The power coefficients obtained from the standard k-ε model are 15 to 20 per cent lower than the accuracy of the SST model. Further analysis was performed on both the designed blades using ANSYS CFX and SST turbulence model. The variation in pressure distributions yields to the varying lift coefficient distribution across blade spans. The lift coefficient reached its peak between 0.75 and 0.8 of the blade span where the total lift accelerates with increasing pressure before drastically dropping down at 0.9 onwards due to the escalating rotational velocity of the blades.

The work presents a computational design methodological approach that is entirely original. While this numerical method has proven to be accurate and robust for many traditional tidal turbines, it has now been verified further for CB tidal turbines.

Develops an original 12‐step management of technology protocol and applies it to 51 applications which range from Du Pont’s failure in Nylon to the Single Online Trade Exchange for Auto Parts procurement by GM, Ford, Daimler‐Chrysler and Renault‐Nissan. Provides many case studies with regards to the adoption of technology and describes seven chief technology officer characteristics. Discusses common errors when companies invest in technology and considers the probabilities of success. Provides 175 questions and answers to reinforce the concepts introduced. States that this substantial journal is aimed primarily at the present and potential chief technology officer to assist their survival and success in national and international markets.

This chapter is based on a self-study of teacher education practices (S-STEP) project that explored the pedagogical practices of a teacher educator and the impact of such practices on a teacher candidate engaged in the process of becoming a translingual teacher. This S-STEP study includes David, a professor in a teacher education program in the greater New York City metropolitan area, and Mary, a teacher candidate enrolled in the program. The purpose of the study was to discover how different class activities influenced the philosophical and pedagogical views of one teacher candidate in the program. The following are the two research questions of the study:

1. How did the class experiences that a teacher education professor, David, designed help teacher candidates conceptualize translingual approach to language and literacy development?

2. How did a monolingual teacher candidate, Mary, develop her role as a translingual English teacher through the completion of these experiences?

How did the class experiences that a teacher education professor, David, designed help teacher candidates conceptualize translingual approach to language and literacy development?

How did a monolingual teacher candidate, Mary, develop her role as a translingual English teacher through the completion of these experiences?

The findings of this S-STEP project demonstrate that the Sociocultural Reflection, the Community Study, and the Linguistic Landscape fostered a translingual approach to language and literacy in the classroom. Moreover, the findings suggest that upon the completion of the projects, one teacher education candidate was able to better define translingualism as a phenomenon of study, ideology, and pedagogy.

Since this investigation is based on a S-STEP project of a single teacher educator and a single teacher candidate, more research with larger populations is needed. Practical implications for teacher educators and teacher candidates in other settings are explored.

This paper aims to conduct a comprehensive literature review in the tidal energy physics, the ocean environment, hydrodynamics of horizontal axis tidal turbines and bio-mimicry.

The paper provides an insight of the tidal turbine blade design and need for renewable energy sources to generate electricity through clean energy sources and less CO₂ emission. The ocean environment, along with hydrodynamic design principles of a horizontal axis tidal turbine blade, is described, including theoretical maximum efficiency, blade element momentum theory and non-dimensional forces acting on tidal turbine blades.

This review gives an overview of fish locomotion identifying the attributes of the swimming like lift-based thrust propulsion, the locomotion driving factors: dorsal fins, caudal fins in propulsion, which enable the fish to be efficient even at low tidal velocities.

Finally, after understanding the phenomenon of caudal fin propulsion and its relationship with tidal turbine blade hydrodynamics, this review focuses on the implications of bio-mimicking a curved caudal fin to design an efficient horizontal axis tidal turbine.

At every period of time marked by years, the seasons by turns and twists in history, among country folk especially, the years of great storms and hard winters; in law enforcement, the passing of some far‐reaching, profound statutory measure, there is this almost universal tendency to look back—over your shoulder‐assessing changes, progressive or otherwise, discerning trends and assaying prospects. We are about to emerge from the seventies—battered but unbowed!—into the new decade of the eighties, perhaps with a feeling that things can only get better.

The purpose of this article is to outline possibilities for the integration of text mining and other digital humanities computing techniques into library catalogs and “discovery systems”.

The approach has been to survey existing text mining apparatus and apply this to traditional library systems.

Through this process it is found that there are many ways library interfaces can be augmented to go beyond the processes of find and get and evolve to include processes of use and understand.

To the best of the author's knowledge, this type of augmentation has yet to be suggested or implemented across libraries.

India generates a massive 9.4 million tonnes of plastic waste annually; out of which approximately 5.6 million tonnes go for recycling and 3.8 million tonnes are left uncollected or leaked from after-use collection systems. Reckless production and consumption of non-biodegradable plastic has serious implications, especially for developing nations where plastic use is predominant for fulfilling needs of increasing population and rapid urbanisation. Despite the harmful impacts of plastic, its desirability is inevitable due to its versatility. For the stringently growing economies, affordable and durable solutions will always be priorities over mindfulness. Imprudent plastic waste has precipitated the ban-change-collect challenge. Options like banning single use plastic (SUP), using alternative bio-benign products and improving waste collection systems are not proactively embraced by businesses and governments. Also, user-awareness and behaviour change for make-use-dispose is not instantaneous and easy. Optimistically, the government, NGOs and industry units have started exhibiting sensitivity to the cause and the emergence of start-ups is decentralising waste management in India. Inclusion of informal waste pickers in the formal waste management system has increased the reach and social impact of start-ups in India, imparting a distinctive and promising twist to the waste management sector. This chapter investigates the plastic waste management scenario in India through extensive literature review. It scrutinises the social aspects associated with the plastic waste management sector and attempts to comprehend connotations of ‘socially responsible plastic’ through semi-structured interviews with service providers in the sector. Thematic analysis was used to analyse interview data. The research indicated the initiation of systemic efforts towards formalisation of the sector. It emphasised the importance of role of waste pickers and their recognition as enablers of the system. Need of an ecosystem approach to nurture start-ups and facilitate better transparency and integration in the waste management system is also illustrated in this research.

Who will lead Ambridge in the years to come? Theories rooted in psychology and political science, when applied to family dynamics in The Archers, allow for some educated guesses. Social learning theory suggests that children who see their parents vote, run for office and participate in other civic activities are more likely to do the same in adulthood. Emma Grundy did just that when she followed in the footsteps of her father, Neil Carter, in winning a seat on the parish council. Previous research has found that birth order also can shape future leaders, with the eldest child more likely to benefit developmentally from parents' undivided attention in the early years, and also more likely to establish a hierarchy of power over younger siblings. With these factors in mind, who are the most probable contenders to lead Ambridge in the spheres of politics, business and civic affairs? The extant research points to Pip Archer, Lily Pargetter, Phoebe Aldridge and George Grundy. The unique circumstances of Ruairi Donovan's childhood suggest he may also be a formidable candidate. And, as is the case in so many contexts, one would be wise not to overlook Molly Button.

Extant literature on entrepreneurship highlights the importance of the entrepreneurs' social network in mobilizing resources for their ventures. Over the last few years, entrepreneurial crowdfunding opportunities have become a subject of growing research interest as it acts as a tool to mobilize financial resources. However, many of these studies are limited within the scope of new ventures, creative industries, and commercial entrepreneurship. In this study, we examine crowdfunding within the context of social entrepreneurship in order to gain a deeper understanding of the motivation and the characteristics of the pool of individuals that contribute to social entrepreneurial crowdfunding. Data for this study have been collected from four cases of social entrepreneurial crowdfunding campaigns. The campaigners, who raised the funds in France for social ventures based in India, shared their knowledge of 157 individuals that contributed to their crowdfunding campaign. The findings inform that crowdfunders mainly originate from the crowdfunding campaigner's helper network, such as family, friends, and colleagues. A small percentage were also acquaintances and strangers. This network of individuals was motivated to support the campaigner achieve her/his goal or was attracted to the social cause that triggered them in creating a social impact. Moreover, the crowdfunders were generally open-minded and well-traveled individuals accustomed to participating in social and voluntary activities. Our study reveals that some members of the helper network are likely to disappoint by not supporting the crowdfunding campaign, thus emphasizing a twist to the existing literature on entrepreneurship. This has practical implications that prompt social entrepreneurs to exercise their social capital, networking skills, and communication strategies to attract and expand their community of helpers in order to trigger individuals from both their helper network as well as individuals outside their current network toward crowdfunding.

The long controversy that has waxed furiously around the implementation of the EEC Directives on the inspection of poultry meat and hygiene standards to be observed in poultry slaughterhouses, cutting‐up premises, &c, appears to be resolved at last. (The Prayer lodged against the Regulations when they were formally laid before Parliament just before the summer recess, which meant they would have to be debated when the House reassembled, could have resulted in some delay to the early operative dates, but little chance of the main proposals being changed.) The controversy began as soon as the EEC draft directive was published and has continued from the Directive of 1971 with 1975 amendments. There has been long and painstaking study of problems by the Ministry with all interested parties; enforcement was not the least of these. The expansion and growth of the poultry meat industry in the past decade has been tremendous and the constitution of what is virtually a new service, within the framework of general food inspection, was inevitable. None will question the need for efficient inspection or improved and higher standards of hygiene, but the extent of the