Stakeholders\u27 Perspectives on Standardised Water Accounting Reports: Accountability Perspective

Purpose – This paper explores the perceptions of potential users about water accounting reports prepared under Standardised Water Accounting (SWA), and reflected in the Exposure Draft of Australian Water Accounting Standard 1 (ED AWAS 1). One of the shortfalls in the development of ED AWAS 1 is the lack of a proper study on the information needs of potential users of water accounting reports and this research paper attempts to fill in this gap. Efficient and effective water management is an important element in alleviating water crises caused by misuse of water resources. Design/methodology/approach – The theoretical framework adopted in this paper is Accountability. This concept is explored in depth across three main ideas: clarity of relationship, transparency and power. A mixed method approach was utilised in which a questionnaire was administered to users with water-related interests in five different water-related seminars. The results yield to 36 usable responses. Most questions were closed ended with possible responses ranging from either a five-point Likert scale or a ‘Yes/No/Undecided’. The qualitative phase involved the analysis of secondary by examining public submissions to the Water Accounting Standards Board on ED AWAS 1. Findings – The majority of respondents perceive that it is useful to use a standard system to prepare water accounting reports (applying SWA). Moreover, the majority of potential users are unsure about the effectiveness of such reports in discharging the accountability of water managers, and a significant number of stakeholders were unaware of its development. After analysing the submissions based on the integrated accountability model, it was found that accountability is unlikely to be fully realised. Submissions reflect the perceptions on potential users of General Purpose Water Accounting Reports (GPWAR)

Clearcutting: Can You See the Forest for the Trees?

The Organic Act of 1897 provided for the establishment and ,management of the national forest and park lands. In West Virginia Division of the Izaak Walton League v. Butz the United States District Court, applying the plain meaning of the Organic Act, permanently enjoined clearcutting on the Monongahela National Forest of West Virginia. The meaning of isolated words, however, is rarely determinative of Congressional intent. This article will demonstrate the shortcomings of the court\u27s decision through an examination of the doctrines of statutory construction and analysis of the legislative history and administrative interpretation of the Act and by addressing the real issue, clearcutting as a scientific management technique

The Long and the Short of It: The Influence of Briefs on Outcomes in the Roberts Court

This Article considers the role of information, affected groups, and persuasion in the connection between justice votes and the content of briefs in the Roberts Court. Hazelton, Hinkle, and Spriggs shed new light on the previously observed finding that the side with the most briefs is more likely to win. The authors find that the true advantage lies in providing the Court with a greater amount of information overall, and that holding total information constant, a greater number of briefs is, surprisingly, a disadvantage

Hydrogen Epoch of Reionization Array (HERA)

The Hydrogen Epoch of Reionization Array (HERA) is a staged experiment to measure 21 cm emission from the primordial intergalactic medium (IGM) throughout cosmic reionization ($z=6-12$), and to explore earlier epochs of our Cosmic Dawn ($z\sim30$). During these epochs, early stars and black holes heated and ionized the IGM, introducing fluctuations in 21 cm emission. HERA is designed to characterize the evolution of the 21 cm power spectrum to constrain the timing and morphology of reionization, the properties of the first galaxies, the evolution of large-scale structure, and the early sources of heating. The full HERA instrument will be a 350-element interferometer in South Africa consisting of 14-m parabolic dishes observing from 50 to 250 MHz. Currently, 19 dishes have been deployed on site and the next 18 are under construction. HERA has been designated as an SKA Precursor instrument. In this paper, we summarize HERA's scientific context and provide forecasts for its key science results. After reviewing the current state of the art in foreground mitigation, we use the delay-spectrum technique to motivate high-level performance requirements for the HERA instrument. Next, we present the HERA instrument design, along with the subsystem specifications that ensure that HERA meets its performance requirements. Finally, we summarize the schedule and status of the project. We conclude by suggesting that, given the realities of foreground contamination, current-generation 21 cm instruments are approaching their sensitivity limits. HERA is designed to bring both the sensitivity and the precision to deliver its primary science on the basis of proven foreground filtering techniques, while developing new subtraction techniques to unlock new capabilities. The result will be a major step toward realizing the widely recognized scientific potential of 21 cm cosmology.Comment: 26 pages, 24 figures, 2 table

Mapping Cosmic Dawn and Reionization: Challenges and Synergies

Cosmic dawn and the Epoch of Reionization (EoR) are among the least explored observational eras in cosmology: a time at which the first galaxies and supermassive black holes formed and reionized the cold, neutral Universe of the post-recombination era. With current instruments, only a handful of the brightest galaxies and quasars from that time are detectable as individual objects, due to their extreme distances. Fortunately, a multitude of multi-wavelength intensity mapping measurements, ranging from the redshifted 21 cm background in the radio to the unresolved X-ray background, contain a plethora of synergistic information about this elusive era. The coming decade will likely see direct detections of inhomogenous reionization with CMB and 21 cm observations, and a slew of other probes covering overlapping areas and complementary physical processes will provide crucial additional information and cross-validation. To maximize scientific discovery and return on investment, coordinated survey planning and joint data analysis should be a high priority, closely coupled to computational models and theoretical predictions.Comment: 5 pages, 1 figure, submitted to the Astro2020 Decadal Survey Science White Paper cal

Cosmology with the Highly Redshifted 21cm Line

In addition to being a probe of Cosmic Dawn and Epoch of Reionization astrophysics, the 21cm line at $z>6$ is also a powerful way to constrain cosmology. Its power derives from several unique capabilities. First, the 21cm line is sensitive to energy injections into the intergalactic medium at high redshifts. It also increases the number of measurable modes compared to existing cosmological probes by orders of magnitude. Many of these modes are on smaller scales than are accessible via the CMB, and moreover have the advantage of being firmly in the linear regime (making them easy to model theoretically). Finally, the 21cm line provides access to redshifts prior to the formation of luminous objects. Together, these features of 21cm cosmology at $z>6$ provide multiple pathways toward precise cosmological constraints. These include the "marginalizing out" of astrophysical effects, the utilization of redshift space distortions, the breaking of CMB degeneracies, the identification of signatures of relative velocities between baryons and dark matter, and the discovery of unexpected signs of physics beyond the $\Lambda$CDM paradigm at high redshifts.Comment: Science white paper submitted to Decadal 2020 surve

Cosmopolitan Species As Models for Ecophysiological Responses to Global Change: The Common Reed \u3cem\u3ePhragmites australis\u3c/em\u3e

Phragmites australis is a cosmopolitan grass and often the dominant species in the ecosystems it inhabits. Due to high intraspecific diversity and phenotypic plasticity, P. australis has an extensive ecological amplitude and a great capacity to acclimate to adverse environmental conditions; it can therefore offer valuable insights into plant responses to global change. Here we review the ecology and ecophysiology of prominent P. australis lineages and their responses to multiple forms of global change. Key findings of our review are that: (1) P. australis lineages are well-adapted to regions of their phylogeographic origin and therefore respond differently to changes in climatic conditions such as temperature or atmospheric CO2; (2) each lineage consists of populations that may occur in geographically different habitats and contain multiple genotypes; (3) the phenotypic plasticity of functional and fitness-related traits of a genotype determine the responses to global change factors; (4) genotypes with high plasticity to environmental drivers may acclimate or even vastly expand their ranges, genotypes of medium plasticity must acclimate or experience range-shifts, and those with low plasticity may face local extinction; (5) responses to ancillary types of global change, like shifting levels of soil salinity, flooding, and drought, are not consistent within lineages and depend on adaptation of individual genotypes. These patterns suggest that the diverse lineages of P. australis will undergo intense selective pressure in the face of global change such that the distributions and interactions of co-occurring lineages, as well as those of genotypes within-lineages, are very likely to be altered. We propose that the strong latitudinal clines within and between P. australis lineages can be a useful tool for predicting plant responses to climate change in general and present a conceptual framework for using P. australis lineages to predict plant responses to global change and its consequences