Blar i Vitenskapelige artikler på forfatter "Talbot, Bruce"
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A comparison of two methods of data collection for modelling productivity of harvesters: manual time study and follow-up study using on-board-computer stem records
Brewer, Julia; Talbot, Bruce; Belbo, Helmer; Ackerman, Pierre; Ackerman, Simon (Journal article; Peer reviewed, 2018-04-13)Productivity of a mechanized P. patula cut-to-length harvesting operation was estimated and modelled using two methods of data collection: manual time study and follow-up study using StanForD stem files. The objective of ... -
An inverse shortest path approach to find forwarder productivity functions
Søvde, Nils Egil; Astrup, Rasmus Andreas; Talbot, Bruce (Journal article; Peer reviewed, 2018-06-05)This paper presents an optimization model designed to find productivity functions for timber forwarding. Timber forwarding or skidding has for some 25 years been calculated using shortest path formulations on grid networks. ... -
An operational UAV-based approach for stand-level assessment of soil disturbance after forest harvesting
Talbot, Bruce; Rahlf, Johannes; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018-01-16)The effectiveness of generating virtual transects on unmanned aerial vehicle-derived orthomosaics was evaluated in estimating the extent of soil disturbance by severity class. Combinations of 4 transect lengths (5–50 m) ... -
Applications of DEA and SFA in benchmarking studies in forestry: state-of-the-art and future directions
Strange, Niels; Bogetoft, Peter; Ottaviani Aalmo, Giovanna; Talbot, Bruce; Holt, Anders Holm; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2021-05-17)The forestry sector is constantly looking for ways for making data-driven decisions and improving efficiency. The application of Data Envelopment Analysis (DEA) and Stochastic Frontier Analysis (SFA) allow the users to go ... -
Assessing Harvested Sites in a Forested Boreal Mountain Catchment through Global Forest Watch
Rossi, Fernando; Breidenbach, Johannes; Puliti, Stefano; Astrup, Rasmus Andreas; Talbot, Bruce (Journal article; Peer reviewed, 2019-03-06)Global Forest Watch (GFW) provides a global map of annual forest cover loss (FCL) produced from Landsat imagery, offering a potentially powerful tool for monitoring changes in forest cover. In managed forests, FCL primarily ... -
Detection and Classification of Root and Butt-Rot (RBR) in Stumps of Norway Spruce using RGB Images and Machine Learning
Ostovar, Ahmad; Talbot, Bruce; Puliti, Stefano; Astrup, Rasmus Andreas; Ola, Ringdahl (Journal article; Peer reviewed, 2019-04-01)Root and butt-rot (RBR) has a significant impact on both the material and economic outcome of timber harvesting, and therewith on the individual forest owner and collectively on the forest and wood processing industries. ... -
The effect of tree and harvester size on productivity and harvester investment decisions
Ackerman, Simon A.; Talbot, Bruce; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2021-11-02)Long-term machine-derived data sets comprising 140,000 trees were collected from four harvesters of equal age and similar working conditions, into two machine size classes, viz. two Ponsse Bears and two smaller Ponsse ... -
Efficiency drivers in harvesting operations in mixed Boreal stands: a Norwegian case study
Ottaviani Aalmo, Giovanna; Kerstens, Pieter Jan; Belbo, Helmer; Peter, Bogetoft; Talbot, Bruce; Strange, Niels (Peer reviewed; Journal article, 2020-06-17)This paper uses Data Envelopment Analysis (DEA) to evaluate how the technical efficiency of forest harvesting operations is influenced by terrain conditions and forest attributes, in addition to exploring the existence of ... -
High-pruning of European beech (Fagus sylvatica L.) and pedunculate oak (Quercus robur L.): work efficiency for target pruning as a function of tree species, pruning height, branch characteristics, pole saw type and operator
Skovsgaard, Jens Peter; Markmann, Jacob Johan Mohr; Attocchi, Giulia; Talbot, Bruce (Journal article; Peer reviewed, 2018-02-27)The objective of this study was to establish an operational model of productive work time per tree (work efficiency) for high-pruning of young European beech and pedunculate oak depending on tree species, pruning height, ... -
A review of Sensors, Sensor-Platforms and Methods Used in 3D Modelling of Soil Displacement after Timber Harvesting
Talbot, Bruce; Astrup, Rasmus Andreas (Peer reviewed; Journal article, 2021)Proximal sensing technologies are becoming widely used across a range of applications in environmental sciences. One of these applications is in the measurement of the ground surface in describing soil displacement impacts ... -
Spatio-temporal prediction of soil moisture and soil strength by depth-to-water maps
Schönauer, Marian; Väätäinen, Kari; Prinz, Robert; Lindeman, Harri; Pszenny, Dariusz; Jansen, Martin; Maack, Joachim; Talbot, Bruce; Astrup, Rasmus Andreas; Jaeger, Dirk (Peer reviewed; Journal article, 2021-11-16)The utilization of detailed digital terrain models entails an enhanced basis for supporting sustainable forest management, including the reduction of soil impacts through predictions of site trafficability during mechanized ... -
Tree-Stump Detection, Segmentation, Classification, and Measurement Using Unmanned Aerial Vehicle (UAV) Imagery
Puliti, Stefano; Talbot, Bruce; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018-02-27)Unmanned aerial vehicles (UAVs) are increasingly used as tools to perform a detailed assessment of post-harvest sites. One of the potential use of UAV photogrammetric data is to obtain tree-stump information that can then ...