Modelling of selection and mating decisions in tree breeding programs

Hardwood trees from the temperate forests of southern Australia are an important source of timber for high quality paper. Two species in particular, Eucalyptus globulus and Eucalyptus nitens are well suited to this purpose and are now widely grown in commercial plantations. These plantations have been established by professional tree breeders using seedlings derived originally from broadly based collection of seed in natural forests. To increase productivity it is desirable to select trees that grow quickly and give high yields of top quality timber. Nevertheless it is important to maintain genetic diversity in the breeding population and thereby retain a robust capacity to adapt to changing environmental factors. In this article we formulate a number of related mathematical models for the selection and mating processes and discuss the consequences of these models. We recommend a relatively simple scheme which can be implemented on an IBM compatible PC using standard algorithms

Understanding EBLIP at an organizational level: an initial maturity model

Objective - Existing research around evidence based practice in the LIS (library and information science) professional context over the past two decades has captured the experience of individual practitioners, rather than the organization as a whole. Current models of evidence based library and information practice (EBLIP) relate to, and apply predominantly to, individuals or specific scenarios. Yet despite a growing demand from institutional and library leaders for evidence to demonstrate why investments in libraries should continue, little is known about how an organization can enhance its maturity in evidence based practice. This paper addresses this gap by seeking to understand what an evidence based university library looks like and answering the questions: how does a university library leader know the library’s service and practice is evidence based? How can a university library measure and progress its maturity in evidence based practice? Methods - Sixteen semi-structured interviews were conducted with library professionals employed at Australian and New Zealand university libraries. Transcripts were analyzed using thematic analysis techniques. The interviews, combined with a literature review and environmental scan of evidence based practices in university libraries, informed the development of a draft capability maturity model as a framework for developing evidence based practice in university libraries. Results - The model identifies and describes characteristics at five different levels of evidence based practice maturity from least mature (Ad hoc/Sporadic) to most mature (Transforming). Three dimensions of experience help to define the characteristics at each level of maturity and provide a framework to understand how a university library might develop its organizational capacity in evidence based library and information practice. Conclusion - Library leaders and practitioners will benefit from the model as they seek to identify and build upon their evidence based practice maturity, enabling more robust decision-making, a deeper understanding of their clients and demonstration of value and impact to their stakeholders

Efficient self-consistent viscous-inviscid solutions for unsteady transonic flow

An improved method is presented for coupling a boundary layer code with an unsteady inviscid transonic computer code in a quasi-steady fashion. At each fixed time step, the boundary layer and inviscid equations are successively solved until the process converges. An explicit coupling of the equations is described which greatly accelerates the convergence process. Computer times for converged viscous-inviscid solutions are about 1.8 times the comparable inviscid values. Comparison of the results obtained with experimental data on three airfoils are presented. These comparisons demonstrate that the explicitly coupled viscous-inviscid solutions can provide efficient predictions of pressure distributions and lift for unsteady two-dimensional transonic flow

The Military Career of James Gettys

James Gettys was a Federalist, tried and true. From his role in the American Revolution to his final position as Vice Brigadier General during the War of 1812, James understood the necessity for “we the people” to remain united as one, power in numbers. He lived that way, worked that way, and built his town on that premise. Like most of the frontiersmen of his time, his life was difficult, and his rise to the top was not always met with valor. Much like his father, Samuel, James Gettys fought for everything he had, and his attainments were well earned. Until recently, discussion of James Gettys’ military career began with his 1781 role as a Cornet in a Light Horsemen of York County. While any role in the Revolutionary War was beneficial, his appeared fairly insignificant, as a Cornet was a lower ranked officer, and Gettys’ unit was never activated.1 Seemingly odd given his numerous promotions within the militia, James appeared to witness the fighting safely on the sidelines. New research, however, reveals, that this version of events is not entirely accurate. This article reviews that new evidence and narrates the postwar Revolutionary War life of Gettysburg’s founding father

Cosmological Forecasts for Combined and Next Generation Peculiar Velocity Surveys

Peculiar velocity surveys present a very promising route to measuring the growth rate of large-scale structure and its scale dependence. However, individual peculiar velocity surveys suffer from large statistical errors due to the intrinsic scatter in the relations used to infer a galaxy's true distance. In this context we use a Fisher Matrix formalism to investigate the statistical benefits of combining multiple peculiar velocity surveys. We find that for all cases we consider there is a marked improvement on constraints on the linear growth rate $f\sigma_{8}$. For example, the constraining power of only a few peculiar velocity measurements is such that the addition of the 2MASS Tully-Fisher survey (containing only $\sim2,000$ galaxies) to the full redshift and peculiar velocity samples of the 6-degree Field Galaxy Survey (containing $\sim 110,000$ redshifts and $\sim 9,000$ velocities) can improve growth rate constraints by $\sim20\%$. Furthermore, the combination of the future TAIPAN and WALLABY+WNSHS surveys has the potential to reach a $\sim3\%$ error on $f\sigma_{8}$, which will place tight limits on possible extensions to General Relativity. We then turn to look at potential systematics in growth rate measurements that can arise due to incorrect calibration of the peculiar velocity zero-point and from scale-dependent spatial and velocity bias. For next generation surveys, we find that neglecting velocity bias in particular has the potential to bias constraints on the growth rate by over $5\sigma$, but that an offset in the zero-point has negligible impact on the velocity power spectrum.Comment: 24 pages, 11 figures, 7 tables. Accepted for publication in MNRA

The Epistemology and Ethics of Media Markets in the Age of Information

The paper will seek to demonstrate that information as communication has a dual inherent normative structure that commits its disseminators, especially the media, offline and online, to epistemological and ethical principles that are universally mandatory. With regard to the dissemination of information by the media, its business intelligence constituted by its commercial interests as a media market must always be congruent with moral intelligence on the basis of the epistemological and ethical universal principles that the dual normative structure of information gives rise and to which the media itself is committed. When the media?s business intelligence comes into conflict with moral intelligence, the latter must always take precedent over the former. Moreover, the communication of information to the public by the media, offline and online, even if conceived merely as another market commodity, commits the media to ethical conduct regardless of any other commercial interests that may come into conflict with the media?s ethical commitments to the public