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How to measure a halo

Conservation fences are a new and challenging method of protecting Australian threatened mammal species, as evidenced in a recent article in The Conversation.At present, fences protect populations of native species behind their walls. In future, we want to use these fences as source populations to restock the surrounding landscape. Extra animals that can't fit into the small space offered by the fences would be released into the surrounding landscape. These released animals would create a "halo-effect", where the benefit of …

Study level
Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Accurately and efficiently fitting surfaces to measured data

Many problems in applied mathematics require the reconstruction or extrapolation of a surface based on (limited) measured data points on the surface.An example of this includes reconstructing physical surfaces from information in photographic, point scanner or medical imaging data. Less obvious examples include extending a mathematical surface defined only locally to something defined globally: this has application in modelling moving interfaces in fluids.With these problems it's important to consider how to accurately and efficiently calculate the surface and how to …

Study level
PhD, Master of Philosophy, Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

How many species have been saved by national parks?

National parks are the cornerstone of modern conservation efforts. They now cover more than 10% of the Earth’s land surface, and are found on every continent (and sea) on the planet.We can prove that these national parks stop human destruction of habitat, and we can prove that they benefit the lives and livelihoods of people who visit and surround them. However, we cannot yet prove that they have stopped the extinction of a single species. This is not because we …

Study level
PhD, Master of Philosophy, Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Optimal guerilla conservation

Guerilla conservation is the use of illegal activities to positively or negatively alter a region’s biodiversity. Famous examples include the “direct action” activities of Sea Shepherd (e.g., damaging whaling vessels), or the practice of “tree spiking” that was common in the forest wars in the temperate rainforests of Tasmania and the Pacific Northwest in the USA.In recent years, guerilla conservation actors have attempted to achieve their aims by releasing new species into ecosystems. Examples include the release of foxes into …

Study level
Master of Philosophy, Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Data centre management and optimisation with improved energy efficiency

Data centres have been increasingly built to provide a wide range of data, network, and cloud services. The increasing demand in various services requires more and more data centre resources and consequently more and more energy is consumed in data centres. It is estimated that about 30% of the running cost of a data centre is the energy consumption. Therefore, it is significant to manage and optimize data centre resources and energy consumption in data centres.

Study level
PhD, Master of Philosophy, Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Electrical Engineering and Computer Science

The freezing method for models with chemotaxis

The freezing method is a numerical technique developed by Byen and collaborators to numerically compute and investigate the stability of traveling waves in partial differential equations (PDEs). The freezing method uses equivariances to transform the PDE into a partial differential algebraic equation (PDAE) and subsequently solves this PDAE. Currently, the freezing method does not work for a suite of models for cell migrations since these models possess chemotaxis terms.The aims of this project are to:understand the freezing methodextend it to …

Study level
Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Sequences for cryptography and communications

Pseudo-random sequences have applications in many fields, including cryptography and other areas of communications (information transmission and retrieval). For these applications it is often useful to consider binary sequences that can be generated from a finite state using a Boolean state update function.For most applications, desirable sequence properties include maximal period, high non-linearity, high algebraic degree and several others. These can be assessed for any given function; however, for states of moderate size it is not feasible to list all …

Study level
PhD, Master of Philosophy, Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Cryptanalysis of authenticated encryption algorithms

Cryptography is the science of securing communications. It includes encryption (to provide confidentiality of message content), message authentication (to provide some assurance that the content has not been altered in transit) and a number of other services. These services can be provided by dedicated algorithms (block ciphers) or by finite state machines (stream ciphers, 'sponge' structures).Algorithms that have been proposed for providing such services are analysed using various techniques, to determine if there are any weaknesses that an attacker could …

Study level
PhD, Master of Philosophy, Honours
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

QUT Arm Farm

Deep Learning has seen significant growth and improvements in computer vision systems over the last years. Our work at the Australian Centre for Robotic Vision is looking at how robotic manipulation tasks be improved by using visual feedback. A lot of activities at the intersection at robotics, vision and learning at QUT.

Study level
PhD, Master of Philosophy, Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Electrical Engineering and Computer Science

Creation of fibre meshworks at moving interfaces

Extracellular matrix (ECM) secreted by cells is composed of a meshwork of fibres infiltrated with proteins and/or minerals. This fibre meshwork often matures after its creation by rearranging its structure, e.g. according to local mechanical clues, or by the infiltration of new molecules [1]. In this project, the fibre meshwork will be represented by a continuous tensorial field [2].ReferencesBidan C et al. Gradual conversion of cellular stress patterns into pre-stressed matrix architecture during in vitro tissue growth, J R Soc …

Study level
Master of Philosophy, Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Stochastic patterns of tissue inclusions

Biological tissue growth involves the secretion of new tissue (extracellular matrix, collagen fibers) by cells. This secretion incorporates scattered inclusions such as proteins and minerals into the new tissue. During bone tissue growth, some of the tissue-secreting cells themselves become incorporated into the new tissue. The distribution of these tissue-embedded cells is believed to influence subsequent tissue growth processes.

Study level
PhD, Master of Philosophy, Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

Collisions with evolving surfaces

The density of impacts of particles colliding with an evolving surface is of particular interest for several industrial and biological applications. These include etching and deposition processes [1], the incorporation of molecules in a tissue during its growth, budding cell membranes, and biological tissue growth [2]. Impacts on an evolving surface are generated unevenly depending on the relative velocity between the particles and the surface. The distribution of impacts further evolves in a curvature-dependent manner due to the local distortions …

Study level
PhD, Master of Philosophy, Honours, Vacation research experience scheme
Faculty
Science and Engineering Faculty
Lead unit
School of Mathematical Sciences

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