Radicalizing refamiliarization

In this short article, our aim is to consider contemporary American visual culture through a contribution to the question concerning Barack Obama. However, our article is not a work of academic philosophy, art theory, or even a description of the theoretical humanities. Rather, it is a postmodern meditation on the condition of American appropriation art

Evaluating the impact of Internet provision on students’ information‐gathering strategies

This paper explores the use of the World Wide Web (WWW) as a teaching and learning tool. In particular, it focuses on the impact of new technology on students’ learning. An investigative study was undertaken using two cohorts of students taking modules supported by WWW pages. Two modules were selected. These were taught by the same lecturer but adopted distinctly different approaches to delivering module content via the WWW. The administrative structure of both pages was similar in the delivery of basic information, lecture themes, assessment details, outline of essential reading, etc. However, the depth of the material provided in support of each lecture topic, and the styles of assessment for each module, were quite different. The study identified distinct differences in confidence in using the WWW and perceptions of its value for learning, between the two student cohorts. It is proposed that this is a reflection of the depth of material provided and the type of knowledge acquisition encouraged by the contrasting styles of the WWW pages

The regularity of the boundary of a multidimensional aggregation patch

Let $d \geq 2$ and let $N(y)$ be the fundamental solution of the Laplace equation in $R^d$ We consider the aggregation equation $$\frac{\partial \rho}{\partial t} + \operatorname{div}(\rho v) =0, v = -\nabla N * \rho$$ with initial data $\rho(x,0) = \chi_{D_0}$, where $\chi_{D_0}$ is the indicator function of a bounded domain $D_0 \subset R^d.$ We now fix $0 < \gamma < 1$ and take $D_0$ to be a bounded $C^{1+\gamma}$ domain (a domain with smooth boundary of class $C^{1+\gamma}$). Then we have Theorem: If $D_0$ is a $C^{1 + \gamma}$ domain, then the initial value problem above has a solution given by $$\rho(x,t) = \frac{1}{1 -t} \chi_{D_t}(x), \quad x \in R^d, \quad 0 \le t < 1$$ where $D_t$ is a $C^{1 + \gamma}$ domain for all $0 \leq t < 1$

Characterization of radially symmetric finite time blowup in multidimensional aggregation equations,

This paper studies the transport of a mass $\mu$ in $\real^d, d \geq 2,$ by a flow field $v= -\nabla K*\mu$. We focus on kernels $K=|x|^\alpha/ \alpha$ for $2-d\leq \alpha<2$ for which the smooth densities are known to develop singularities in finite time. For this range This paper studies the transport of a mass $\mu$ in $\real^d, d \geq 2,$ by a flow field $v= -\nabla K*\mu$. We focus on kernels $K=|x|^\alpha/ \alpha$ for $2-d\leq \alpha<2$ for which the smooth densities are known to develop singularities in finite time. For this range we prove the existence for all time of radially symmetric measure solutions that are monotone decreasing as a function of the radius, thus allowing for continuation of the solution past the blowup time. The monotone constraint on the data is consistent with the typical blowup profiles observed in recent numerical studies of these singularities. We prove monotonicity is preserved for all time, even after blowup, in contrast to the case $\alpha >2$ where radially symmetric solutions are known to lose monotonicity. In the case of the Newtonian potential ($\alpha=2-d$), under the assumption of radial symmetry the equation can be transformed into the inviscid Burgers equation on a half line. This enables us to prove preservation of monotonicity using the classical theory of conservation laws. In the case $2 -d < \alpha < 2$ and at the critical exponent $p$ we exhibit initial data in $L^p$ for which the solution immediately develops a Dirac mass singularity. This extends recent work on the local ill-posedness of solutions at the critical exponent.Comment: 30 page

Income Security and Stability During Retirement in Canada

Post-war policies and subsequent debates had two policy targets: reducing old-age poverty and enhancing income security for the “average worker” after retirement. While we know a lot about the first issue, the second has received less attention as a result of data limitations. We take advantage of unique longitudinal data based on Canadian tax files (the LAD) to examine income replacement rates of older Canadians relative to their economic status when they were in their mid-fifties. In 2005, the replacement income of retired individuals in their mid-seventies who were in the middle of the income distribution at age 55 (in the early 1980s) was between 70 and 80 percent of their previous incomes some 20 years earlier This figure is at the high end of the range (65 to 75 percent) that experts generally consider “adequate” for middle-income retirees to maintain their pre-retirement living standards. However, we also show that there is considerable variation in replacement rates. By age 75, about a quarter of middle-income persons had retirement incomes of less than 60 percent of the income they were receiving in their mid-fifties, a result of differential access to private pension income. We also ask whether income replacement rates have been rising or falling among more recent cohorts of retirees but find little change. Finally, we report results about the stability of incomes in the retirement years. We conclude that year to year instability in family income declines for both high and low income earners as they age, largely because of the stabilizing effect of public pension income sources.retirement, income security

Why Have Poorer Neighbourhoods Stagnated Economically, While the Richer have Flourished? Neighbourhood Income Inequality in Canadian Cities

Higher income neighbourhoods in Canada’s eight largest cities flourished economically during the past quarter century, while lower income communities stagnated. This paper identifies some of the underlying processes that led to this outcome. Increasing family income inequality drove much of the rise in neighbourhood inequality. Increased spatial economic segregation, the increasing tendency of “like to live nearby likeâ€, also played a role. In the end, the differential economic outcomes between richer and poorer neighbourhoods originated in the labour market, or in family formation patterns. Changes in investment, pension income, or government transfers played a very minor role. But it was not unemployment that differentiated the richer from poorer neighbourhoods. Rather, it was the type of job found, particularly the annual earnings generated. The end result has been little improvement in economic resources in poor neighbourhoods during a period of substantial economic growth, and a rise in neighbourhood income inequality.Inequality, Neighbourhood, Poverty

From outer circle to center stage: The maturation of heterodox economics

This is chapter 2 of the book "Future Directions in Heterodox Economics" by John T. Harvey and Robert F. Garnett, Jr., Editors. The inner circle of neoclassical economics has limited its horizons, increasing the scope for heterodox economists to claim ever more of the most important issues. Two values contend for primacy: being scientific, and being relevant. These need not—and should not—be in conflict; an important goal for economics in the future is to bring them into better harmony.Heterodox economics, contextual economics, neoclassical theory, economic goals, history of economic thought

Spacelab- The First Mission & Beyond

The recent successful flight of Spacelab 1 while being the culmination of over 10 years of international cooperation is seen as just the start of a new era in manned scientific operations in orbit. This paper highlights the objectives and results of that first mission, as well as describing the international Spacelab program, its concept, and its history. Then looking to the future, the plans for utilizing Spacelab, its versatility and potential to the science community and its continuing evolution are discussed. Plans for substantially improving the cost effectiveness of Spacelab are examined including the use of dedicated discipline laboratories and small payload carriers. Finally, the paper evaluates the importance of incorporating Spacelab technology, concepts, lessons learned, and methodology into the development and utilization of an international Space Station over the next decade

The complete plastome of Hyacinthoides non-scripta (L.) Chouard ex Rothm. (Asparagaceae)

The whole plastome sequence ofHyacinthoides non-scripta, was assembled and annotated in this study.This is the first complete plastid genome for the genusHyacinthoides. The plastome is 155,035 bp longand consists of a large single-copy (LSC) region spanning 83,947 bp, a small single-copy (SSC) regionspanning 18,496bp, and two inverted repeat (IR) regions, each of which is 26,296bp in length. Thereare 132 genes annotated in the plastome, of which the protein-coding geneinfAhas pseudogenized