Strategic concealment of sexual identity in an estrildid finch

One explanation for the evolution of sexual monomorphism is the sexual indistinguishability hypothesis, which argues that in group-living species individuals might benefit by concealing their sex to reduce sexual competition. We tested this hypothesis in long-tailed finches Poephila acuticauda. Males and females could not be reliably distinguished morphologically or by analysis of the reflectance spectra (300-700 nm) from the plumage and bill. Males seemed unable to distinguish the sex of an unfamiliar individual in the absence of behavioural cues; they were equally likely to court and copulate with unfamiliar males and females but rarely courted familiar males. Here we report the first experimental evidence that sexual monomorphism enables strategic concealment of sex. Males were more likely to reveal their sex when faced with a solitary unfamiliar individual than a group of unfamiliar individuals. When encountering an unfamiliar male that revealed his sex, subordinate males were more likely to conceal their sex than dominant males.

Modification of the visual background increases the conspicuousness of golden-collared manakin displays

Effective visual communication requires signals that are easy to detect, transmit, receive, and discriminate. Animals can increase the probability that their visual signals would be detected by evolving signals that contrast with their visual background. Animals can further enhance this contrast by behaviorally modifying the existing visual background. Male golden-collared manakins (Manacus vitellinus) clear leaf litter from the ground to form courts, which are used as display arenas. Using reflectance measures of the signal (male plumage) and the visual background (cleared court and adjacent litter), the irradiance measures of ambient light during display, and published measures of photoreceptor sensitivity of a Passerine, we test the hypothesis that court-clearing augments the contrast between male plumage and the visual background. We find that the chromatic and brightness contrasts of golden patches used during courtship are greater against the cleared court than against adjacent litter. In addition, we find that cleared courts provide a less variable background for these color patches, resulting in displays that consistently contrast the visual background. These results suggest that behavioral modification of the visual background may act to increase the conspicuousness of colorful male plumage during display, providing an explanation for why golden-collared manakins, and possibly other species, build or clear display courts.

Male great bowerbirds create forced perspective illusions with consistently different individual quality

Males often produce elaborate displays that increase their attractiveness to females, and some species extend their displays to include structures or objects that are not part of their body. Such "extended phenotypes" may communicate information that cannot be transmitted by bodily signals or may provide a more reliable signal than bodily signals. However, it is unclear whether these signals are individually distinct and whether they are consistent over long periods of time. Male bowerbirds construct and decorate bowers that function in mate choice. Bower display courts constructed by male great bowerbirds (Ptilonorhynchus nuchalis) induce a visual illusion known as forced perspective for the female viewing the male's display over the court, and the quality of illusion is associated with mating success. We improved the quality of the forced perspective to determine whether males maintained it at the new higher level, decreased the perspective quality back to its original value, or allowed it to decay at random over time. We found that the original perspective quality was actively recovered to individual original values within 3 d.We measured forced perspective over the course of one breeding season and compared the forced perspective of individual males between two successive breeding seasons. We found that differences in the quality of visual illusion among males were consistent within and between two breeding seasons. This suggests that forced perspective is actively and strongly maintained at a different level by each individual male.

Social capital framework in the adoption of e-learning

This is a study of the influence of social and cultural factors on the adoption of e-­learning in higher education in Malaysia, Indonesia, Turkey, Singapore and Australia. Particular attention in each case was given to factors relating to social capital, attitudes and patterns of behavior in leadership, entrepreneurialism, and teaching and to broader sets of attitudes that shape general outlook. A case study approach was chosen in order to enable a richer and more finely grained analysis of the issues. The case studies are based on semi-­structured interviews and observations conducted over several years. This research shows that previously known factors that affect the adoption of e-­learning in higher education, namely, policy, guidelines, paradigm shifts and pedagogical change, are also significant in the contexts of each of the case studies in this research. However, this research shows that the adoption and uptake of e-­learning technologies is also strongly shaped by cultural and social factors but not in ways that might first have been expected. It is not so much that there are specific cultural and social factors relating to specific e-­learning technologies, but rather, that the degree of uptake of these technologies depends on teachers being encouraged, guided and assisted to innovate and adopt new technology. This can only occur when there is sufficient social capital, mediated through appropriate social networks, to build trust, overcome objections and anxieties, and generally motivate staff to engage in challenging, time-­consuming initiatives in e-­learning that generally do not promise immediate rewards.

Certain culture-­based issues emerged as important. These included staff mentoring, clustering through ‘bamboo networking’, trust-­building and overcoming fear of ‘losing face’ (kiasu), facilitating women to take the initiative and lead, developing sensitivity to cultural differences, encouraging entrepreneurialism and rewarding pioneering endeavours, all of which were present in varying degrees across all five case studies. There were subtle variations on a central theme, which was clearly that of the impact of social capital as a driver. It was social capital played out through personal relationships and social networks that most strongly influenced individual teachers to be sufficiently motivated to add to an already busy schedule by taking on the additional burdens of pioneering e-­learning technology and it was those social relationships that provided guidance and ongoing encouragement. As a consequence of these findings, this study offers a social capital model of e-­learning adoption, which suggests that the adoption and uptake of e-­learning technologies is strongly shaped by cultural and social factors.

Production of solidarities in YouTube: a visual study of Uyghur nationalism

The uprising in Tibet, which gained the attention of the global media during the preparation for the Beijing Olympics in 2008, and the ethnic riots in Xinjiang in 2009 showed Western audiences the extent of the ethnic conflict between China’s Han ethnic majority and its ethnic minority groups, the Uyghurs being one of them. In the late twentieth century, Uyghur diaspora communities formed their own cultural and political associations in Central Asia, Russia, Turkey, Europe, and North America, while Uyghur political activists have been increasingly using the Internet for spreading political messages promoting Uyghur national ideas. Among their efforts, different Uyghur organizations and individuals have created YouTube channels in order to generate interest in the Uyghur question, to internationalize Xinjiang issues, and to seek support from a variety of audiences. The aim of this research is to examine the structure of political communication about the Han–Uyghur conflict on YouTube, taking into consideration the contents of the videos and available information about authors and audiences. This study combines quantitative and qualitative methods of data analysis and offers insights into how the Internet is used by dispersed political actors within a framework of a single nationalist movement. It also provides a unique window into ethnic relations in Xinjiang and elucidates on how ethnic minority and transnational activist networks search for discourses that could serve as the basis for ethnic mobilization.

The impact of court delays on the prosecutor and the defendant: an economic analysis

One important aspect of the economic theory of criminal court delay is to understand how the prosecutor and the defendant make their decisions, and how these respond to changes in trial delay. If both parties jointly maximise expected utility, trial delay may increase or decrease the number of trials, depending upon the decision makers' attitudes towards risk. The main policy implication is that providing the criminal courts with more resources in the form of additional judges and court capacity may lengthen the trial queue rather than shorten it. This is a counterintuitive result contrary to popular belief.

Court delays and the defendant behaviour: an economic analysis

Court delays are consistently criticised as being inimical to social welfare. However, the theoretical basis for this assertion is not well established in the law and economics literature. As a first step, very little is known about the impact of court delay on the defendant's optimal plea decision. If the defendant is rational in the sense of inter temporally optimising, court delay may increase or decrease the probability of a trial depending on the defendant's bail status. Some empirical support for this theoretical proposition is found using data on plea behaviour for a selection of cases heard in NSW Australia.

Case note - Roosters, ducks and labour hire arrangements : Damevski v Guidice (2003) 202 ALR 494 (FCA Full Court)

One of the features of the current Australian labour market is the growth in the number of businesses "contracting out" work that was previously performed by their employees. The "contracting out" is often done through labour hire arrangements: the business engages a labour hire agency to provide it with suitable labour on an "as needs" basis. A common scenario is that the labour hire agency contracts both with the workers who provide the services to the agency's client, and with the client to whom those services are provided. Often the agency pays the workers and bills its client for the labour costs, plus a service fee. Research indicates that during the first half of the 1990s, "the number of agency workers more or less doubled."1 Analysis of the latest data from the Australian Bureau of Statistics on the number of workers employed through labour hire arrangements has suggested: "290,100 employees were 'on-hired' through agencies in June 2002 and 162,000 workers were paid by labour hire firms in November 2001 (almost doubling from 84,300 some three years earlier)." The value of the employment services industry in 2001-02 was $10.2 billion. 2

Re Alex: adolescent gender identity disorder and the family court of Australia

'People with gender identity disorder live with a conviction that their physical anatomy is incompatible with their true gender role. They have an overwhelming desire to live and function in the opposite biological sex' . The manifestation of the disorder in children and adolescents is dominated by secrecy, confusion and shame. The purpose of this article is to promote discussion amongst the legal fraternity of the difficult issues confronting the Family Court of Australia when asked to make decisions with life-altering ramifications for the young and vulnerable.

Strategies for the marketing of higher education with comparative contextual references between Australia and Turkey

Education is now a global product with institutions worldwide competing for students and finding ever more creative ways to satisfy student needs and preferences. With the continuing rise in the preference for flexible distance learning, educational institutions are finding that when students and faculty have significantly different cultural backgrounds and learning styles that the expectations of the learning experience can be unfulfilled. In Australia, international students have made education Australia’s third largest service export, earning $5.8 billion. This means that student populations have moved from being homogenous and captive to domestic constraints and expectations, to being multi-cultural, dispersed and subject to a plethora of constraints and expectations. Today in Turkey, education is the responsibility of government however, in recent years, the private sector has entered the market providing educational services at all levels. In particular, after the 1990s, private higher education institutions (HEIs) with a commercial focus have mushroomed.

In 2007, there are 25 private universities in Turkey with more than 2.000.000 students enrolled in these universities. Of these students, more than 1.000.000 are registered in distance education faculties. With such large student numbers competition between private universities for students has intensified particularly over the last 15 years. As a consequence the need to develop strategies for attracting students has become more important. Marketing strategies in Turkey have tended to concentrate on three distinct categories: strategies between governmental HEIs, private HEIs and distance education HEIs. The contribution of technologies to education processes has been immense with students and faculty each learning to adapt to an environment of continuous change and opportunities. This paper seeks to explore the notion that a competitive advantage in marketing of higher education can be attained by customizing learning experiences for particular student cohorts in a pro-active and constructive way.