A5008322137- Forest ecology and management
- Wood Treatment and Properties
- Forest Biomass Utilization and Management
- Forest Insect Ecology and Management
- Forest Management and Policy
- Forest Ecology and Biodiversity Studies
- Tree Root and Stability Studies
- Insect-Plant Interactions and Control
- Optimization and Packing Problems
- Material Properties and Processing
- Remote Sensing and LiDAR Applications
- Industrial Vision Systems and Defect Detection
- Fire effects on ecosystems
- Computational Geometry and Mesh Generation
- Plant Pathogens and Fungal Diseases
- Biological Control of Invasive Species
- Digital and Cyber Forensics
- Advanced Cellulose Research Studies
- Plant Pathogens and Resistance
- 3D Modeling in Geospatial Applications
- Entomopathogenic Microorganisms in Pest Control
- Cloud Computing and Resource Management
- Manufacturing Process and Optimization
- Electronic Packaging and Soldering Technologies
- Electrostatic Discharge in Electronics
Scion
2014-2024
Museum of New Zealand Te Papa Tongarewa
2023-2024
Future Forests Research
1997-2012
Australian Defence Force Academy
2010
UNSW Sydney
2010
Forest Research Institute
2000
Today most sawmills use optimization techniques to maximize yields from logs. If open market conditions are assumed when maximizing volume or value yields, overproduction of some products and underproduction others may result. In this study, a system is described that links production with log sawing while also addressing demands for timber differing qualities. The based on an framework implemented in simulator, AUTOSAW. Unlike other systems static product ''values'' such as board price,...
Shrubland biomass is important for fire management programmes and carbon estimates. Aboveground the combustible portion of biomass, fuel load, in past have been measured using destructive techniques. These techniques are detailed, highly labour intensive, costly; hence, an alternative approach was sought. The new used linear mixed-effects models to estimate loads from easily field variables: shrub overstorey height cover, understorey cover. Site regarded as a random effect. Sampling sites...
Abstract Cerambycid species of the Spondylidinae subfamily are distributed worldwide and known for being prolific invaders that infest conifers. In New Zealand, Arhopalus ferus (Mulsant), burnt pine longhorn beetle, is well-established requires monitoring at high-risk sites such as ports, airports, sawmills part requirements to meet log export standards set by Zealand Ministry Primary Industries (MPI). Currently, its surveillance relies on traps baited with host volatiles (i.e., ethanol...
Exposure to carbon monoxide (CO) emitted by chainsaws can negatively impact health in forestry workers. This exploratory study measures CO concentration within the breathing zone of chainsaw operators during motor-manual operations, and discusses potential influences on exposure levels. A monitoring instrument was paired with a concurrent video recording task activities enable correlation exact working operations critical Multiple streams meteorological data were also collected from sensors...
To understand the effects of silvicultural treatments on tree and product modulus elasticity (MOE), an intensive study along stand-tree-product value chain was conducted. Acoustic tests were performed 460 Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees from two sites in US Pacific Northwest. Trees a site Washington 51 years old, while those situated Oregon 45 old. Both comprised five plots: Plot A control, Plots B, C, D, E prescribed with differing thinning treatments. readings...
In this study, the inverse relationship between lifetime and secondary creep rate was verified suggesting that shorter duration tests can be used to evaluate lifetimes. Also, variability in significantly lower than previous studies using enhanced testing facilities could reduce required number of repetitions. A novel finding an observed transition point applied loading level where cyclic humidity conditions had highest rates at low loads constant high loads. Finally, it determined a standard...
Background: Accurate estimates of wood density are needed by the forest sector to increase value along tree-to-product value-chain. Amongst tools supporting in-situ assessments, micro-drills and acoustic hammers have become increasingly popular. Our objective was use these tools, other easily-obtained measures, develop predictive models for assessments Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees in western North America. Methods: Wood 133 trees, 60–75 years-old, were benchmarked...
Abstract With today's tree improvement technology coupled with knowledge of the influence forest management practices on growth and log quality, it is possible to manipulate form engineer trees specific characteristics. Theoretically we can create portfolios optimize suitability for different end uses. We could design structural forests optimal building materials, LongClears Forests furniture mouldings markets, or PulpWood pulp paper industries. This project's goal was explore methods...
New Zealand-grown cypresses are typically harvested at 35–40 years of age; however, shorter rotations have been proposed. The objective this study was to evaluate the feasibility producing structural products from through examination wood properties younger cypress trees. A detailed radial property trends necessary, and first ring-level models for three taxa were developed because there no predictive available. Radial in density, microfibril angle (MFA) modulus elasticity (MOE) examined 55...
Acoustic tools have simplified estimation of wood modulus elasticity (MOE). Strong relationships between acoustic velocity and MOE logs encouraged use acoustics at earlier points in the value chain, culminating development harvesting systems. With accurate estimates individual trees, improvements efficiency along chain increased recovery will result. Our aim was to quantify accuracy three distinct points: pre-harvest (standing trees), during harvest (merchantable boles), post-harvest (5-m...
Control of weeds is important for survival, growth and uniformity planted conifers, such as Pinus radiata D.Don Pseudotsuga mensiesii var. menziesii (Mirb.) Franco. Despite pressure to find environmentally benign herbicides these species, little research has identified non-residual that are cost-effective result in minimal loss compared those used operationally. The objective this study was compare efficacy cost current operational practice a range alternative herbicide treatments the...
Abstract The solitary larval endoparasitoid Eadya daenerys Ridenbaugh (Hymenoptera: Braconidae) is a proposed biocontrol agent of Paropsis charybdis Stål (Coleoptera: Chrysomelidae, Chrysomelinae), pest eucalypts in New Zealand. oviposition behaviour was examined two assay types during host range testing, with the aim improving ecological prediction. No‐choice sequential and two‐choice behavioural observations were undertaken against nine closely related species Zealand non‐target beetle...
There is worldwide interest in non-destructive evaluation (NDE) tools to extract more value from logs. Technologies range high precision, resolution scanners, such as computed tomography (CT) less precise or lower technologies. While the lesser technologies are associated with costs, they accompanied by reduced precision. In this study, effect of precision on lumber yield was examined determine whether benefits still possible imperfect knowledge internal defects. As attainment optimal a log...
Background: Red needle cast (RNC) is a foliar disease of radiata pine (Pinus D.Don), caused by Phytophthora pluvialis Reeser, Sutton & E.Hansen and occasionally kernoviae Brasier, Beales S.A.Kirk. The has impacted plantations in New Zealand since at least 2008. To develop management recommendations for red cast, research focused on identifying chemical control options understanding pathogen epidemiology to guide optimal timing spray application. objectives this study were to: (1) assess...
Abstract Aerial application of an herbicide mixture triclopyr, dicamba, picloram, and aminopyralid is used to control dense infestations exotic conifers, notably lodgepole pine ( Pinus contorta Douglas ex Loudon), in New Zealand. The rates applied these tree weeds has the potential for off-target impacts through persistence forest floor, soil, water. Persistence three herbicides was investigated cast needles, floor (litter, fermented humic layer [LFH]), soil following their operational...
Abstract A survey was conducted at nine sawmills in Japan to evaluate and compare the sawing of sugi (Cryptomeria japonica D. Don) logs 30 cm more diameter. The purpose fourfold: (1) document patterns appropriate large-diameter logs; (2) examine composition wood components (structural, nonstructural, fixtures) produced from those patterns; (3) investigate log product prices; (4) ascertain distances supplier markets. Impetus for study arose a forecasted shift diameter distribution plantation...