TGLE Vol 50 nos. 3 & 4 full issue

The Great Lakes Entomologist Volume 50 Numbers 3 & 4 Fall/Winter full issue

Improving productivity of the private native forest resource in southern Queensland and northern New South Wales

Private native forests across Queensland and New South Wales (NSW) are an important source of domestic timber supply upon which the Australian hardwood timber industry depends. This project aimed to generate new information for the timber industry and landholders on the timber producing potential of private native forests in southern Queensland and northern NSW. Specifically, the project aimed to determine: (i) the spatial extent and condition of the private native forest resource and establish a framework for ongoing inventory; (ii) the influence of forest management (i.e. thinning regimes) on tree growth rates, carbon stocks and ecological attributes; and (iii) the potential return on investment associated with silvicultural management

Cost Sharing for Biodiversity Conservation: A Conceptual Framework

„h Many resource users undertake actions that conserve biodiversity. If, however, there were public demand for more conservation than would be provided voluntarily by the private sector alone, there are two broad principles for determining who should bear the costs ¡X ¡¥impacter pays¡¦ or ¡¥beneficiary pays¡¦. The two principles have different efficiency and distributional effects. „h A fundamental step in determining which cost sharing principle to apply is the clarification of the rights and responsibilities implied by existing property rights. This is an important issue that requires further work. „h If property rights effectively require resource users to meet an environmental standard, resource users who fail to achieve this may be considered to generate external costs. In these circumstances, on efficiency grounds, the impacter pays principle should generally be adopted to internalise external costs. This effectively amounts to enforcement of an individual¡¦s existing legal responsibilities. However, if the costs of implementing the impacter pays principle were to outweigh its efficiency advantages, the beneficiary pays principle may be considered.environment, conservation, biodiversity

Abstracts for Other Oral Presentations

Abstracts for Other Oral Presentations pp.1-2

Putting the Stars within Reach Using NASA 3D Data-Based Models

This study investigated the quantifiable effects of data-based 3D models and prints on spatial reasoning skills and interest in science, technology, engineering, and mathematics (STEM) fields, for n = 100 youths aged 9-12 (99 female and 1 non-binary), primarily from traditionally underrepresented groups in STEM. In a pre-post design, participants engaged in workshops using data-based astrophysical 3D models delivered via computer-based interactions, virtual reality, and 3D prints. Multivariate ANOVAs yielded significantly increased STEM interest but were not significant for increasing spatial ability. The results are discussed in terms of the need to extend exposure and science communications to STEM activities to female youths that are younger than middle school aged

Effective Design and Operation of Supply Chains for Remnant Inventory Systems

This research considers a stochastic supply chain problem that (a) has applications in anumber of continuous production industries, and (b) integrates elements of several classicaloperations research problems, including the cutting stock problem, inventory management,facility location, and distribution. The research also uses techniques such as stochasticprogramming and Benders' decomposition. We consider an environment in which a companyhas geographically dispersed distribution points where it can stock standard sizes of a productfrom its plants. In the most general problem, we are given a set of candidate distributioncenters with different fixed costs at the di®erent locations, and we may choose not to operate facilities at one or more of these locations. We assume that the customer demand for smaller sizes comes from other geographically distributed points on a continuing basis and this demand is stochastic in nature and is modeled by a Poisson process. Furthermore, we address a sustainable manufacturing environment where the trim is not considered waste, but rather, gets recycled and thus has an inherent value associated with it. Most importantly, the problem is not a static one where a one-time decision has to be made. Rather, decisions are made on a continuing basis, and decisions made at one point in time have a significant impact on those made at later points. An example of where this problem would arise is a steel or aluminum company that produces product in rolls of standard widths. The decision maker must decide which facilities to open, to find long-run replenishment rates for standard sizes, and to develop long-run policies for cutting these into smaller pieces so as to satisfy customer demand. The cutting stock, facility-location, and transportation problems reside at the heart of the research, and all these are integrated into the framework of a supply chain. We can see that, (1) a decision made at some point in time a®ects the ability to satisfy demand at a later point, and (2) that there might be multiple ways to satisfy demand. The situation is further complicated by the fact that customer demand is stochastic and that this demand could be potentially satisfied by more than one distribution center. Given this background, this research examines broad alternatives for how the company's supply chain should be designed and operated in order to remain competitive with smaller and more nimble companies. The research develops a LP formulation, a mixed-integer programming formulation, and a stochastic programming formulation to model di®erent aspects of the problem. We present new solution methodologies based on Benders' decomposition and the L-shaped method to solve the NP-hard mixed-integer problem and the stochastic problem respectively. Results from duality will be used to develop shadow prices for the units in stock, and these in turn will be used to develop a policy to help make decisions on an ongoing basis. We investigate the theoretical underpinnings of the models, develop new, sophisticated computational methods and interesting properties of its solution, build a simulation model to compare the policies developed with other ones commonly in use, and conduct computational studies to compare the performance of new methods with their corresponding existing methods

Leadership in Multi-sided Markets

I analyze the role of leadership in multi-sided markets as online advertising. Search and display advertising are better characterized by (respectively) quantity and price competition. A platform that reached dominance in search may have an incentive to limit services to consumers to be aggressive with the advertisers, to exploit its scale in search to build barriers to entry, or to adopt click-weighted auctions to manipulate the pricing of sponsored links. On the other side, a dominant platform in display advertising may increase the rewards of content providers to increase prices on advertisers, or may adopt exclusive clauses to predate on other platforms.Multisided markets, Leadership, Dominance

The role of trees in sustainable agriculture : a national conference : reprints of Western Australian papers

The role of trees in land and stream salinity control in Western Australia (Conference paper: N.J. Schofield, M.A. Ban, D.T. Bell, W.J. Boddington, R.J. George, N.E. Pettit) The role of trees in providing shelter and controlling erosion in the dry temperate and semi-arid southern agricultural areas of Western Australia (Conference paper: D. Bicknell) Management of native woody vegetation on farms in Western Australia (Conference paper: J.P. Pigott) Producing timber from trees - options for farmers in Western Australia (Conference paper: R. Moore) Trees and shrubs as sources of fodder in Western Australia (Conference paper: E.C. Lefroy) Minor forest products in WA (Conference paper: M.A. Scheltema) Conservation, production and planted trees – Conservation are they compatible? (Workshop Paper: J. Bartle and and M.A. Scheltema) Production A method of determining the long term costs and benefits of alternative farm plans (Workshop Paper: A. Kubicki, C. Denby, M. Stevens, A. Haagensen) Trees to control groundwater - some examples from WA (Workshop Paper: P.R. Scott) Looking forward with our feet on the ground (Workshop Paper: G. Bee) Ecological indicators of sustainable agriculture (Workshop Paper: E.C. Lefroy and R.J. Hobbs) There’s more to growing timber than just planting trees (Workshop Paper: R. Moore) Agroforestry systems as a product - selling to the market (Workshop paper - P.R. Scott