Testing bulls for breeding soundness

New tests are available to ensure that bulls are fertile

Choosing a calcium supplement for sheep fed cereal grains

Sheep fed cereal grains as an energy source over summer usually need added calcium because cereal grains are generally low in calcium (for example, 0.03 per cent calcium compared to 0.26 per cent phosphorus), and there may not be a natural source such as clover, weeds, leafy stubble or edible bush in the paddock. The safestt and most effective calcium supplement is finely ground limestone added to the feed, but some farmers have used other sources of calcium such as gypsum and superphosphate in this manner

“A Process of Controlled Serendipity”: An Exploratory Study of Historians’ and Digital Historians’ Experiences of Serendipity in Digital Environments

We investigate historians\u27 experiences with serendipity in both physical and digital environments through an online survey. Through a combination of qualitative and quantitative data analyses, our preliminary findings show that many digital historians select a specific digital environment because of the expectation that it may elicit a serendipitous experience. Historians also create heuristic methods of using digital tools to integrate elements of serendipity into their research practice. Four features of digital environments were identified by participants as supporting serendipity: exploration, highlighted triggers, allowed for keyword searching and connected them to other people

Black holes in asymptotically Lifshitz spacetimes with arbitrary critical exponent

Recently, a class of gravitational backgrounds in 3+1 dimensions have been proposed as holographic duals to a Lifshitz theory describing critical phenomena in 2+1 dimensions with critical exponent $z\geq 1$. We numerically explore black holes in these backgrounds for a range of values of $z$. We find drastically different behavior for $z>2$ and $z2$ ($z<2$) the Lifshitz fixed point is repulsive (attractive) when going to larger radial parameter $r$. For the repulsive $z>2$ backgrounds, we find a continuous family of black holes satisfying a finite energy condition. However, for $z<2$ we find that the finite energy condition is more restrictive, and we expect only a discrete set of black hole solutions, unless some unexpected cancellations occur. For all black holes, we plot temperature $T$ as a function of horizon radius $r_0$. For $z\lessapprox 1.761$ we find that this curve develops a negative slope for certain values of $r_0$ possibly indicating a thermodynamic instability.Comment: 23 pages, 6 figures, references corrected, graphs made readable in greyscal

Testing a direct mail offer in magazine subscription promotion

Direct marketing is an $82 million per year business. Its history dates back over a century with roots in direct mail. Direct marketing today involves not only mail, but a variety of media, including newspapers and magazines, radio, television and telephone. The cornerstone of direct marketing is its measurability and accountability, as well as a reliance on lists and a database (Baier, 1983). In other words, direct marketing allows marketers to improve their skills by measuring what they do against previous tests. The availability of lists and data about lists provides populations from which samples can be drawn to conduct tests. Although direct marketers can use a variety of direct response techniques to generate measurable responses, direct mail accounts for approximately one-half of the total expenditures on direct response advertising (Baier, 1983). A major advantage direct mail has over other media is that it is most suitable for testing. Other advantages are the ability of direct mail to be personalized, the flexibility it offers, and its ability to maximize customer list profits. Direct mail also has the highest response rate of the marketing medias. One disadvantage of direct mail is its relatively high cost-per-thousand, as compared to magazines, television, or newspapers

Institutional ethnography of Aboriginal Australian child separation histories : implications of social organising practices in accounting for the past

How we come to know about social phenomena is an important sociological question and a central focus of this thesis. How knowledge is organised and produced and becomes part of ruling relations is empirically interrogated through an institutional ethnography. I do this in the context of explicating the construction of a public history concerning Aboriginal Australian child separations over the 20th century, and in particular as it arose in the 1990s as a social problem. Particular attention is given to knowledge construction practices around the Australian National Inquiry into the Separation of Aboriginal Children from Their Families (1996-1997) and the related Bringing Them Home Oral History Project (1998-2002). The once separated children have come to be known as The Stolen Generation(s) in public discourse and have been represented as sharing a common experience as well as reasons for the separations. Against the master narrative of common experience and discussion of the reasons for it, this thesis raises the problematic that knowledge is grounded in particular times and places, and also that many people who are differently related and who have experiences which contain many differences as well as similarities end up being represented as though saying the same thing. Through an institutional ethnography grounded in explicating the social organising activities which produced the Bringing Them Home Oral History Project, I examine how institutional relations coordinate the multiplicity and variability of people’s experiences through a textually-mediated project with a focused concern regarding the knowing subject, ideology, accounts, texts and analytical mapping. Through this I show how ruling relations are implicated in constructing what is known about the Aboriginal child separation histories, and more generally how experience, memory, the telling of a life and the making of public history are embedded in social organising practices

Spacetime and the Holographic Renormalization Group

Anti-de Sitter (AdS) space can be foliated by a family of nested surfaces homeomorphic to the boundary of the space. We propose a holographic correspondence between theories living on each surface in the foliation and quantum gravity in the enclosed volume. The flow of observables between our ``interior'' theories is described by a renormalization group equation. The dependence of these flows on the foliation of space encodes bulk geometry.Comment: 12 page

String Thermalization at a Black Hole Horizon

Susskind has recently shown that a relativistic string approaching the event horizon of a black hole spreads in both the transverse and longitudinal directions in the reference frame of an outside observer. The transverse spreading can be described as a branching diffusion of wee string bits. This stochastic process provides a mechanism for thermalizing the quantum state of the string as it spreads across the stretched horizon.Comment: 14 pages, latex, SU-ITP-94-4, NSF-ITP-94-1