Modeling the tensile behavior of fibers with geometrical and structural irregularities

Virtually all fibers exhibit some dimensional and structural irregularities. These include the conventional textile fibers, the high-performance brittle fibers and even the newly developed nano-fibers. In recent years, we have systematically examined the effect of fiber dimensional irregularities on the mechanical behavior of the irregular fibers. This paper extends our research to include the combined effect of dimensional and structural irregularities, using the finite element method (FEM). The dimensional irregularities are represented by sine waves with a 30 % magnitude of diameter variation while the structural irregularities are represented by longitudinal and horizontal cavities distributed within the fiber structure. The results indicate that fiber geometrical or dimensional variations have a marked influence on the tensile properties of the fiber. It affects not only the values of the breaking load and extension, but also the shape of the load-extension curves. The fiber structural irregularities simulated in this study appear to have little effect on the shape of the load-extension curves.

Pieces of silver : examples of the economic impact and management of the silver gull (Larus novaehollandiae) in Melbourne, Australia

Like a number of gull species, the silver gull Larus novaehollandiae has expanded its population in response to human food subsidy. The major anthropogenic food source is food waste at rubbish tips. Other sources of human food waste are also exploited. Many problems result from the activities of these birds, including human health and safety, economic impacts, and effects on the conservation of other species. My study examines aspects of the economic impacts of the silver gull on the human community of the Greater Melbourne Area comprising approximately 4065 km2 (1569 square miles). My data collection method involves identifying sites where problems have been experienced and completing questionnaires during face to face interviews with the managers of those sites. Data collected at this early stage of the study demonstrate that there are significant, quantifiable economic impacts associated with the superabundance of the silver gull in this area. Other impacts, such as reduced amenity and potential health hazards are equally real but more difficult to quantify. Costs include damage to structures and products, damage prevention measures, and loss of production. Information about the costs of these problems will be presented to the relevant landfill management authorities to encourage them to consider alternative means of disposing of putrescible waste, rather than by open landfill disposal, because even current best practice management of open landfill sites (rubbish tips) provides ample opportunity for silver gulls and certain other bird species to exploit this food source. Controlling access by the silver gull to food at rubbish tips would be an important first step in managing the population of this species.

Is there global inclusion of authors in the five leading advertising journals? A regional comparison 1998-2007

A question that has been raised in academia has to do with whether there is global inclusion of authors in publishing. While this issue has been explored in some areas in business and marketing it has generally not been investigated across 30 years of advertising research activity. This paper seeks to examine the global inclusion of authors in five advertising-focused journals. We found that, while there appears to be an increase in international publishing activity in advertising compared to data extrapolated from past studies, published advertising research still reveals a North American bias/domination. A failure to be globally inclusive may lead to an under-exploration of academic issues and perspectives, as important 'non-US' issues could possibly be ignored.

Autobiography in Australian parliamentary first speeches

This article analyzes the autobiographical content in the First Speeches of three Australian parliaments (1950, 1976, and 1996). It argues that such autobiographical disclosure has significant political functions—in particular, representing credentials, and representing social and political affiliations. The essay argues that these functions highlight, and finesse, the paradoxical condition that parliamentarians find themselves in, of having to simultaneously represent themselves and their constituencies.

International operations strategy of public sector organisations

Public sector organisations in many countries are internationalising their operations into other countries. This internationalisation frequently follows channels such as aid schemes offered by the country's government. An investigation was conducted to determine whether the four categories of stJ'ategy approach in Miles and Snow's typology could be used to categorise the internationalisation operation strategy approach of Australian public sector organisations. Qualitative data collected from eight Australian public sector organisations determined that a set of nine operations strategy dimensions identified from the literature applied to the internationalisation behaviours of Australian public sector organisations. The data also indicated that Miles and Snow's four categories of strategy could be used to describe the combined international operation strategy behaviours of Australian public sector organisations. In addition, it was found that the international operation strategy behaviours of Australian public sector organisations aligned with at least two (and in one case four) of Miles and Snow's strategy categories. Alignment with two of Miles and Snow's strategy categories was quite commonly identified in other empirical studies of this typology.

Population genetics of the spotted seahorse (Hippocampus kuda) in Thai waters : implications for conservation

A population genetics approach was used to investigate the genetic diversity of the spotted seahorse (Hippocampus kuda) in Thai waters; specifically, the degree of genetic differentiation and species evolution was inferred from sequence analysis of 353 bp of the mitochondrial (mt)DNA control region. The data were then used to identify discrete populations in Thai waters for effective conservation and management. Spotted seahorses were collected from 4 regions on the east and west coasts of the Gulf of Thailand and a geographically separated region in the Andaman Sea. Of the 101 mtDNA sequences analyzed, 7 haplotypes were identified, 5 of which were shared among individuals from the east and west coasts of the Gulf of Thailand. The remaining haplotypes were restricted to individuals from the Andaman Sea. Nucleotide and haplotype diversities were similar within the Gulf of Thailand samples, whereas diversity was lower in the Andaman Sea sample. Genetic differentiation appeared between pairs of samples from the Gulf of Thailand and Andaman Sea (FST, p < 0.0001). A large genetic variance appeared among the 2 population groups (94.46%, ΦCT = 0.94464, p < 0.01). A Neighbor-joining tree indicated that individuals from the Gulf of Thailand and Andaman Sea formed 2 phylogenetically distinct groups, which were segregated into different population-based clades. While results reported here indicate that populations from the Gulf of Thailand and Andaman Sea should be treated as separate conservation units, a larger sample size from the Andaman Sea is required to confirm this genetic partitioning and low level of diversity observed in the present study.

From whence it came: understanding source effects in consumer‑generated advertising

Web 2.0 technologies are empowering consumers to co-produce online brand communications and thereby co-create brand meaning. As both consumers and marketers are increasingly using video-sharing websites to showcase their brand communication efforts, viewers of these ads are inadvertently becoming part of the co-production process as they create context around the ads (in the forms of reviews, comments and ratings). The environment in which such online advertisements are viewed has significant effects on consumer perceptions of the ad message, and ultimately impacts the persuasive properties and efficacy of the ad. This study reports on research conducted to test the source effects of consumer-generated advertising. Schlinger’s Viewer Response Profile (VRP) is used to assess the impact of three source variables: ad creator, ad popularity and motivation for creation of the ad. Findings confirm the importance of popularity ratings on consumer ad evaluation, and also suggest that certain source effects result in consumers being more critical in their evaluation of the ads.

The effect of product placement in computer games on brand attitude and recall

Media fragmentation and proliferation, in concert with declining television advertising efficacy, has engendered interest in developing more effective ways to reach consumers – particularly non-users of a brand. This study explores the effect of active product placement in computer games on both brand attitude (Abrand) and recall. Findings suggest that exposure to a particular brand in a computer game can increase Abrand among consumers whose pre-existing attitude towards the brand in question is fairly low. It was concluded that product placement within computer games is an effective means of fostering high spontaneous brand recall and even of influencing consumers less positively predisposed towards a brand (analogous to non-users). These findings have promising managerial implications for firms looking to grow their customer base through acquisition and conversion.

Squatting at the digital campfire: researching the open source software community

This paper describes an internet-mediated netnography of the open source software (OSS) community. A brief history of OSS is presented, along with a discussion of the defining characteristics of the phenomenon. A theoretical rationale for the method is then offered and several unique features detailed. The evolution of the methodology in practice is described and salient lessons highlighted. In addition to gathering a large volume of rich data as intended, early phases of the implementation of this method produced a number of unanticipated but significant findings. The paper concludes by summarising the key methodological considerations for conducting a phenomenology of a true online community