Byenup Hill catchment report : Carlecatup catchment land conservation district

The Byenup Hill Catchment is situated just west of Graham\u27s Well which was a major watering point for early travellers. The area was first settled around 1890 and some of the names associated with early settlement are Hinchey, Dennis, Bilney, Holding and Gabette. Clearing with axes was a slow process and most of the sheep were run in the bush in areas free from poison bush. A reasonable number of trees were left standing and the last clearing was done in the 1980\u27s. The first signs of salt appeared in the 1930\u27s and advanced with increased clearing

The Evaluation of Composite Energy Absorbers for Use in UAM EVTOL Vehicle Impact Attenuation

The demand for new personal air-taxi services is leading to the development of lightweight Vertical Take-off and Landing (eVTOL) vehicles with electric propulsion for the Urban Air Mobility (UAM) industry. Manufacturers (OEMs) are considering many different designs to develop a vehicle that is able to take-off, cruise, and land autonomously with seating arrangements ranging between 2 and 15 passengers. It is unclear at present how the eventual market will mature; however, one of the common design characteristics noted by many of the OEMs is the use of advanced materials such as composites. A test and analysis program was initiated at NASA Langley Research Center (LaRC) in 2018 to evaluate the impact attenuation capabilities of various composite material systems with the goal of eventual implementation into an eVTOL vehicle. A series of 3-inch diameter by 6-inch length tubular specimens were fabricated from different material systems which included both traditional carbon and hybrid woven layers of fibers. Additionally, a subset of specimens were filled with closed-cell polyisocyanurate foam to help both with stabilization and crush response. The ultimate goal of the test program was to design a specimen capable of limiting the sustained crush acceleration to 20 g through a stable crush progression. After a series of material tests, these specimens were evaluated under both static and dynamic conditions for impact energy attenuation characteristics and crush stability. Additionally, a series of simulation models were developed in parallel to the test efforts. It is anticipated that the models developed using the component level test efforts can be used to help guide the development of a design for use in full-scale eVTOL vehicle applications

Benefits and costs of saltland pastures on moderately salt-affected land

Summary The analyses in this report show that there could be significant economic benefits to the state, regions and affected farm businesses from establishing improved saltland pasture systems on moderately salt-affected land. The report clearly describes the methods of analysis and the assumptions about prices, productivity and adoption levels. The price of grain has been used as the key factor controlling the economic value of the saltland grazing because grain is the alternative supplementary feed for sheep over the summer and autumn period. Therefore, where yield is below break-even on moderately salt-affected land, it has a higher economic value and is more profitable when converted into productive pastures rather than used for cropping

North Stirling Land Conservation District - soils manual

The North Stirling Land Conservation District is located between Katanning and Albany on the northern edge of the Stirling Ranges in south-western Western Australia.It includes parts of the Shires of Cranbrook and Tambellup, covering approximately 100,000ha of the catchment of the North Stirling basin. The basin is a flat area formed on Eocene sediments with poorly defined drainage lines and many salt lakes. It is surrounded by low granite and sandstone hills. The climate is Mediterranean, with cool wet winters and hot dry summers. Average annual rainfall ranges from 375-500 mm per annum. There is very little surface or underground water flow through the basin and the area is subject to waterlogging and salinity owing to the rising water-tables following the clearing of native vegetation (Lewis1992). The Land Conservation District was formed in 1985 following concern about the rapid decline in productivity resulting from this salinity and waterlogging. There are about 80 landholders in the district, mostly involved in wool, barley, oat and lupin production.This manual has been produced to help you identify and map the soils on your farm. The manual has been compiled for the North Stirling Land Conservation District (L.C.D.) and a list of its members is included in Appendix 1. As well as assisting you to identify soil types, the manual encourages everyone within the L.C.D. to use the same terms so that individual soil maps can be compared

Quantum Dot Potentials: Symanzik Scaling, Resurgent Expansions and Quantum Dynamics

This article is concerned with a special class of the ``double-well-like'' potentials that occur naturally in the analysis of finite quantum systems. Special attention is paid, in particular, to the so-called Fokker-Planck potential, which has a particular property: the perturbation series for the ground-state energy vanishes to all orders in the coupling parameter, but the actual ground-state energy is positive and dominated by instanton configurations of the form exp(-a/g), where a is the instanton action. The instanton effects are most naturally taken into account within the modified Bohr-Sommerfeld quantization conditions whose expansion leads to the generalized perturbative expansions (so-called resurgent expansions) for the energy values of the Fokker-Planck potential. Until now, these resurgent expansions have been mainly applied for small values of coupling parameter g, while much less attention has been paid to the strong-coupling regime. In this contribution, we compare the energy values, obtained by directly resumming generalized Bohr-Sommerfeld quantization conditions, to the strong-coupling expansion, for which we determine the first few expansion coefficients in powers of g^(-2/3). Detailed calculations are performed for a wide range of coupling parameters g and indicate a considerable overlap between the regions of validity of the weak-coupling resurgent series and of the strong-coupling expansion. Apart from the analysis of the energy spectrum of the Fokker-Planck Hamiltonian, we also briefly discuss the computation of its eigenfunctions. These eigenfunctions may be utilized for the numerical integration of the (single-particle) time-dependent Schroedinger equation and, hence, for studying the dynamical evolution of the wavepackets in the double-well-like potentials.Comment: 13 pages; RevTe

Water quality study of the Muchea livestock truck wash

Across Australia there is a lack of information on the quality of the water discharged from facilities that are used to wash livestock trucks. This water quality scoping study partially fills that information gap and provides a starting point for future planning, design and construction of livestock truck washes. The study was undertaken in 2011–12 at the Western Australian Muchea Livestock Centre, and aimed to gain insights into water quality associated with the truck wash facility at that site. These insights can help to inform the planning for further construction of truck wash facilities throughout the state, and whether disposing wastewater to Water Corporation’s sewerage system could be part of a new facility. We examined water quality at primary points of the wastewater treatment system to understand the impact of each part of the system and determine the most appropriate site for detailed temporal monitoring. This was followed by a two-day sampling program at one point in the treatment system. We concluded that the minimum infrastructure requirements to satisfy Water Corporation’s maximum allowable limits for disposal to the sewerage system include sieve bend screens (Hunter screens), an anaerobic or settling pond, and a holding pond to ensure sufficient safety margins if sewer disposal was ever delayed. We recommend that further consideration is given to estimating the capital and operational costs of a truck wash facility that meets these minimum requirements, compared to a closed system that retains all wastewater on-site, or other systems that recover nutrients from high-value products. We also recommend that a sampling program be conducted across all truck washes in WA to gain insight into possible geographical variations and the wider applicability of this study’s findings

Convergence of the expansion of the Laplace-Borel integral in perturbative QCD improved by conformal mapping

The optimal conformal mapping of the Borel plane was recently used to accelerate the convergence of the perturbation expansions in QCD. In this work we discuss the relevance of the method for the calculation of the Laplace-Borel integral expressing formally the QCD Green functions. We define an optimal expansion of the Laplace-Borel integral in the principal value prescription and establish conditions under which the expansion is convergent.Comment: 10 pages, no figure