Sea to hume fish passage task force

In 2001, the Murray-Darling Basin Commission (MDBC) initiated a program to improve fish passage along 2225km of the River Murray, from the sea to Hume Dam, including the construction of 15 new fishways. The three disciplines of biology, hydraulics and engineering are inherently linked in fishway design. As such, a Fish Passage Taskforce (FPTF) was established to recommend fishway design criteria and comprised a team of scientists, engineers, managers and river operators. In order to complement the FPTF, a team of freshwater fish scientists from three states of the Basin (NSW, Victoria, South Australia) was also created to quantitatively assess fishway performance and any associated longer-term benefits from improved fish passage. The rigour instilled in the design process by the integration of the three disciplines was crucial to the overall success of the program. The FPTF has provided a good model for interdisciplinary cooperation and integration of ideas in relation to the conceptual design, construction and monitoring of fishways, setting objectives according to the characteristics of native fish species. An adaptive management approach to fishway design was taken, thus leading to constant design improvements, optimisation, and improved cost-effectiveness as the construction program progressed. The program had a strategic, holistic view and a strong ecological basis, recognising that fish migration can occur over hundreds, and occasionally thousands, of kilometres

An Alternative Teacher Preparation Journey

The following report discusses one university\u27s alternative pathway journey. Four candidates were accepted into the program the first year in the fall of 2003. Since then numbers have increased to over 175 active program participants. Such substantial growth evidences the need for highly qualified teachers, especially in particular content areas and geographic regions as highlighted in the following report. State guidelines and regulation requirements help ensure quality, rigorous programs

Rethinking the foundations: towards powerful professional knowledge in teacher education in the USA and England

In this paper, we aim to outline what foundations can offer in terms of understanding education and educational practice, and thus for providing a basis for teachers’ professional knowledge. We look critically at the struggle foundation disciplines often experience with coherence and integration in terms of both their relation to each other and to broader (e.g. philosophical or sociological) thought. We begin to rethink foundations more as a (strong, disciplinary and professionally orientated) region rather than a singular or a set of singulars (to use Bernstein’s terms), although one that is rather different from other regions. In doing so, we suggest that Bernstein’s work, in providing a rich lens to understand curricula and pedagogic practice while holding social and political issues and implications close, is a useful exemplar of the type of educational knowledge which should be at the core of the foundations. A revitalized region of educational foundations can offer the ‘powerful professional knowledge’ that will enable teachers to make knowledgeable professional judgements in educational practice

Guide to cataloging slotMusic based on AACR2 Chapters 6 and 9

In September 2008 SanDisk announced it would begin making music available for purchase on its microSD flash memory card format.1 The audio files on a slotMusic card are in MP3 format and are offered free of any digital rights management controls. In addition to containing an album\u27s worth of music (i.e., a slotMusic release generally corresponds to a collection of music issued on other formats such as compact disc), a typical slotMusic card may come pre-loaded with images, video, text, MIDI files, etc. Each card contains 1 GB of memory (well more than what is required for the pre-loaded content) and the extra memory can be used in whatever way the buyer wishes. Indeed, the preloaded content can be moved to another storage device and the memory card can be formatted and used like any other card. Music on slotMusic cards can be accessed using any device that both accepts microSD cards and is able to play MP3 files at up to 320 kbps.2 In addition, some slotMusic cards come packaged with a special microSD-to-USB adapter, which makes it possible to load slotMusic content onto a computer, car stereo, or any other device equipped with a USB jack. Some slotMusic cards are also sold as bundles, which in addition to the memory card and USB adapter include special dedicated MP3 players that accept the microSD format. Many early media responses questioned whether there would be a market for slotMusic, reasoning that music consumers interested in MP3s generally are comfortable with downloading them through computer network connections.3 But a more recent report in the Los Angeles Times argues that the format is doing better than many expected.4 Still, in April 2010, a search for “slotmusic” in WorldCat retrieves only the record created by this task force as an example, and it is unclear whether any libraries have begun collecting this new format. In terms of cataloging, slotMusic offers a number of challenges. Like much electronic media, the cards exhibit aspects of more than one format, in this case at least sound recordings and electronic resources. Currently, and as the name implies, slotMusic only offers musical sound recordings, but future releases could potentially contain non-musical sound. SlotMusic releases contain no descriptive information on the card itself, making choice of chief sources of information challenging. And slotMusic releases often come bundled with peripheral items (such as USB adapters and MP3 players) that contain no intellectual content, making for interesting accompanying materials notes. And finally, since the devices that can play the cards are numerous, but the technical requirements of those devices are complex, clear notes regarding the playback characteristics of the cards are necessary

Transcript for Episode 36: Beyond Montana: Tom Judge\u27s 2nd Term Builds International Trade and Sustainable Growth (THIS TRANSCRIPT IS NOT YET AVAILABLE; WILL BE INSTALLED WHEN AVAILABLE)

https://digitalcommons.mtech.edu/crucible_transcriptions/1035/thumbnail.jp

Formation of the first three gravitational-wave observations through isolated binary evolution

During its first 4 months of taking data, Advanced LIGO has detected gravitational waves from two binary black hole mergers, GW150914 and GW151226, along with the statistically less significant binary black hole merger candidate LVT151012. We use our rapid binary population synthesis code COMPAS to show that all three events can be explained by a single evolutionary channel -- classical isolated binary evolution via mass transfer including a common envelope phase. We show all three events could have formed in low-metallicity environments (Z = 0.001) from progenitor binaries with typical total masses $\gtrsim 160 M_\odot$, $\gtrsim 60 M_\odot$ and $\gtrsim 90 M_\odot$, for GW150914, GW151226, and LVT151012, respectively.Comment: Published in Nature Communication

Accuracy of inference on the physics of binary evolution from gravitational-wave observations

The properties of the population of merging binary black holes encode some of the uncertain physics of the evolution of massive stars in binaries. The binary black hole merger rate and chirp mass distribution are being measured by ground-based gravitational-wave detectors. We consider isolated binary evolution and explore how accurately the physical model can be constrained with such observations by applying the Fisher information matrix to the merging black hole population simulated with the rapid binary population synthesis code COMPAS. We investigate variations in four COMPAS parameters: common envelope efficiency, kick velocity dispersion, and mass loss rates during the luminous blue variable and Wolf--Rayet stellar evolutionary phases. We find that 1000 observations would constrain these model parameters to a fractional accuracy of a few percent. Given the empirically determined binary black hole merger rate, we can expect gravitational-wave observations alone to place strong constraints on the physics of stellar and binary evolution within a few years.Comment: 12 pages, 9 figures; version accepted by Monthly Notices of the Royal Astronomical Societ

STROOPWAFEL: Simulating rare outcomes from astrophysical populations, with application to gravitational-wave sources

Gravitational-wave observations of double compact object (DCO) mergers are providing new insights into the physics of massive stars and the evolution of binary systems. Making the most of expected near-future observations for understanding stellar physics will rely on comparisons with binary population synthesis models. However, the vast majority of simulated binaries never produce DCOs, which makes calculating such populations computationally inefficient. We present an importance sampling algorithm, STROOPWAFEL, that improves the computational efficiency of population studies of rare events, by focusing the simulation around regions of the initial parameter space found to produce outputs of interest. We implement the algorithm in the binary population synthesis code COMPAS, and compare the efficiency of our implementation to the standard method of Monte Carlo sampling from the birth probability distributions. STROOPWAFEL finds $\sim$25-200 times more DCO mergers than the standard sampling method with the same simulation size, and so speeds up simulations by up to two orders of magnitude. Finding more DCO mergers automatically maps the parameter space with far higher resolution than when using the traditional sampling. This increase in efficiency also leads to a decrease of a factor $\sim$3-10 in statistical sampling uncertainty for the predictions from the simulations. This is particularly notable for the distribution functions of observable quantities such as the black hole and neutron star chirp mass distribution, including in the tails of the distribution functions where predictions using standard sampling can be dominated by sampling noise.Comment: Accepted. Data and scripts to reproduce main results is publicly available. The code for the STROOPWAFEL algorithm will be made publicly available. Early inquiries can be addressed to the lead autho