Is proof dead in the computer-age school curriculum?

The article questions the status of proof in mathematics. The article mentions that proof has always been the driving force in historical developments in mathematics. It mentions that proof has been for centuries the staple of mathematics and is used to prepare students for higher mathematical studies and to help them learn to handle the demands of daily life. It cites that changes in school curriculum in the last decades of the twentieth century has rendered proof-free mathematics.

Estimating survival and movements using both live and dead recoveries : a case study of oystercatchers confronted with habitat change

1. Animals facing partial habitat loss can try to survive in the remaining habitat or emigrate. Effects on survival and movements should be studied simultaneously since survival rates may be underestimated if emigrants are not considered, and since emigrants may experience reduced survival.

2. We analysed movements and survival of adult wintering oystercatcher Haematopus ostralegus in response to the 1986–1987 partial closure of the Oosterschelde in the Dutch Delta. This reduced by one-third the tidal area of this major European wintering area for waders.

3. We developed a novel variant of a multistate capture–recapture model allowing simultaneous estimation of survival and movement between sites using a mixture of data (live recaptures and dead recoveries). We used a two-step process, first estimating movements between sites followed by site-specific survival rates.

4. Most birds were faithful to their ringing site. Winter survival was negatively affected by winter severity and was lowest among birds changing wintering site (i.e. moving outside of the Oosterschelde).

5. During mild winters, survival rates were very high, and similar to before the closure in both changed and unchanged sectors of the Oosterschelde. However, the combined effect of habitat loss with severe winters decreased the survival of birds from changed sectors and induced emigration.

6. The coastal engineering project coincided with three severe winters and high food stock, making assessment of its effects difficult. However, the habitat loss seems to have had less impact on adult survival and movements than did winter severity.

7. Synthesis and applications. Human-induced habitat change may result in population decline through costly emigration or reduced survival or reproduction of individuals that stay. Long-term monitoring of marked individuals helps to understand how populations respond to environmental change, but site-specific survival and movement rates should be integrated in the same model in order to maximize the information yield. Our modelling approach facilitates this because it allows the inclusion of recoveries from outside the study area.

Letter to a dead playwright : daily grind, Vicki Reynolds and archive fever, part 2

'Nothing is less reliable, nothing is less clear today than the word "archive",' observed Jacques Derrida in his book Archive Fever, a Freudian Impression (1996). This paper reflects on the unsettling process of establishing (or commencing) the Melbourne Workers Theatre archive, which is part of the ARC funded AusStage project. It does so with reference to Derrida's account of archive fever, which he characterises as an 'irrepressible desire to return to the origin, a homesickness, a nostalgia for the return to the most archaic place of absolute commencement' (91). In short, the paper uses Derrida's commentary on questions of memory, authority, inscription, hauntology and heritage to identify some of the philosophical and ethical aporias I have enountered while working on the AusStage project. The paper pays particular attention to what Derrida calls the spectral structure of the archive, and stages a conversation with the ghosts that haunt the digitised Melbourne Workers Theatre documents. It also unpacks the logic of Derrida's so-called messianic account of the archive, which 'opens out of the future' thereby affirming the future-to-come, and unsettling the normative notion of the archive as a repository for what has passed.

Resuscitating students’ learning : exploring the “Living Dead” phenomenon

There is research spanning the 20th century on student disengagement. Despite all the research, the problem remains. It is time to adopt a different perspective. This article attempts to make transparent the influences on disengagement in schools by applying Jean Gebser’s (1985) empirical phenomenological study of cultural consciousness. What differentiates this approach from previous arguments is the basic premise that the “problem” of disengagement lies not with an individual or group, but with the cultural consciousness.

Letter to a dead playwright : daily grind, Vicki Reynolds, and archive fever

’Nothing is less reliable, nothing is less clear today than the word “archive”,’ observed Jacques Derrida in his book Archive Fever: a Freudian Impression (1996). This paper reflects on the unsettling process of establishing (or commencing) an archive for the Melbourne Workers Theatre, to form part of the AusStage digital archive which records information on live performance in Australia. Glenn D'Cruz's paper juxtaposes two disparate but connected registers of writing: an open letter to a deceased Australian playwright, Vicki Reynolds, and a critical reflection on the politics of the archive with reference to Derrida's account of archive fever, which he characterizes as an ‘irrepressible desire to return to the origin, a homesickness, a nostalgia for the return to the most archaic place of absolute commencement’. Using Derrida's commentary on questions of memory, authority, inscription, hauntology, and heritage to identify some of the philosophical and ethical aporias he encountered while working on the project, D’Cruz pays particular attention to what Derrida calls the spectral structure of the archive, and stages a conversation with the ghosts that haunt the digitized Melbourne Workers Theatre documents. He also unpacks the logic of Derrida's so-called messianic account of the archive, which ‘opens out of the future’, thereby affirming the future-to-come, and unsettling the normative notion of the archive as a repository for what has passed. Glenn D’Cruz teaches at Deakin University, Australia. He is the author of Midnight's Orphans: Anglo-Indians in Post/Colonial Literature (Peter Lang, 2006) and editor of Class Act: Melbourne Workers Theatre 1987–2007 (Vulgar Press, 2007).

Ghosts in the machine : do the dead live on in Facebook?

Of the many ways in which identity is constructed and performed online, few are as strongly ‘anchored’ to existing offline relationships as in online social networks like Facebook and Myspace. These networks utilise profiles that extend our practical, psychological and even corporeal identity in ways that give them considerable phenomenal presence in the lives of spatially distant people. This raises interesting questions about the persistence of identity when these online profiles survive the deaths of the users behind them, via the practice of ‘memorialising’ social network profile pages. I situate these practices within a phenomenology of grief that accounts for the ways in which the dead can persist as moral patients, and show how online survival in this case illuminates an important difference between persons and selves within contemporary philosophy of personal identity. Ultimately, the online persistence of the dead helps bring into view a deep ontological contradiction implicit in our dealings with death: the dead both live on as objects of duty and yet completely cease to exist.

Better off dead? Prices realised for Australian paintings sold at auction

Using auction sales data on Australian paintings over the period 1995 and 2003 we investigate the relationship between artists‟ living status and the price of paintings sold at auction. For deceased artists we consider the time since their death and for living artists their conditional life expectancy. Hedonic regression analysis is applied separately to the data on Indigenous and non-Indigenous paintings. Comparing the modelling results across Indigenous and non-Indigenous paintings we see evidence of two different patterns of response to an artist‟s living status. Both yield non-linear impacts but for Indigenous paintings these are quadratic and for non-Indigenous they are quartic. Thus the response to living status in the more recent market for Indigenous paintings is different to the more established market for non-Indigenous paintings. Whilst the responses differ for the two types of paintings, in answer to the question posed and in terms of the price of a painting at auction an artist is better off long dead or close to death.