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16 records – page 1 of 2.

Capabilities of airborne infrared remote sensing systems to detect hotspots

https://library.fpinnovations.ca/en/permalink/fpipub3937
Author
Beck, Judi
Date
April 2004
Edition
40661
Material Type
Research report
Field
Fibre Supply
Author
Beck, Judi
Date
April 2004
Edition
40661
Material Type
Research report
Physical Description
15 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Thermography
Sensors
Infrared spectroscopy
Advantage
Series Number
Advantage ; Vol. 5, No. 11
Language
English
Abstract
The Forest Engineering Research institute of Canada (FERIC) conducted a study to assess the reliability, effectiveness, and cost of airborne infrared remote sensing, mapping and analysis systems used in Alberta. Field trials were conducted to develop assessment methods and to facilitate preliminary tests of the hotspot detection capabilities of two airborne infrared remote sensing systems: an AWIS (Airborne Wildfire Intelligence System) mounted on a twin-engine aircraft, and a FLIR 2000 mounted on a "birddog" aircraft. Logistic regression was used to develop probability of detection models for each of the sensor and aircraft platforms evaluated. This report also describes the development of a simple model that allows fire managers to assess the cost effectiveness of alternative technologies.
Infrared
Fire control
Fire detection
AWIS
FLIR
Remote sensing
Sensors
Thermography
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Determination of DDAC surface retention by FTIR : Test III - effect of surface texture

https://library.fpinnovations.ca/en/permalink/fpipub41118
Author
Byrne, Anthony (Tony)
Daniels, C. Robert
Weigel, G.
Date
March 1995
Material Type
Research report
Field
Sustainable Construction
Author
Byrne, Anthony (Tony)
Daniels, C. Robert
Weigel, G.
Contributor
Canada. Canadian Forest Service.
Date
March 1995
Material Type
Research report
Physical Description
12 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Spectroscopy
Preservatives tests
Preservatives
Infrared spectroscopy
Analysis
Series Number
Canadian Forest Service No. 36
Contract no. 1712L022
W-1188
Location
Vancouver, British Columbia
Language
English
Abstract
Fourier Transform Infrared spectroscopy (FTIR) has been identified as a potential analytical method that might improve monitoring of sapstain control chemicals application in sawmills. The main benefit from use of this technique would be the ability to respond immediately to application problems identified. Based on preliminary laboratory data Bomem Inc., Forintek Canada Corp. (FCC) and the Pacific Forestry Centre (PFC) agreed to undertake research aimed at the development of FTIR for commercial application in sawmills. The first stage in this project was to validate the FTIR method in the laboratory. A protocol was agreed upon for a test which would determine the precision of the FTIR retention predictions on a variety of wood surfaces. Wood strips of rough, planed and intermediate surface texture were prepared. At FCC a technique was devised by which the wood strips were treated with known amounts of DDAC. Intermediate textured replicate samples were treated to known retentions of DDAC and sent to PFC to use in calibrating the FTIR instrument. Additionally, 20 replicates of each surface texture were treated with random amounts of DDAC over the range 0 - 200ug/cm squared. These "unknowns" were also sent to PFC for analyses by FTIR and prediction of DDAC retentions. Although correlation between actual and predicted DDAC retentions was linear within a particular surface texture, results show a mean difference or error between the actual (weight uptake) and FTIR determinations of DDAC retentions of 46% (standard deviation 28%). Therefore, overall, the FTIR analytical method gave unsatisfactory results. Our conclusion is that, based on the current calibration, the FTIR analytical method is not sufficiently accurate for general sawmill application. The surface texture of the wood being scanned significantly affected the retention of DDAC as determined by FTIR and corrections for surface texture would need to be incorporated into the software if further development was to be considered. Additionally, other variables than surface texture (e.g. formulation additives) may influence analytical results and were not considered in this study.
Preservatives - Alkylammonium compound (AAC)
Preservatives - Tests
Preservatives - Chemical analysis
Spectroscopy, Infrared
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Effect of species on magnetic resonance T1 and T2 parameters

https://library.fpinnovations.ca/en/permalink/fpipub5436
Author
Hailey, J.R.T.
Whittall, K.P.
Close, L.M.
MacKay, A.L.
Lyons, M.J.
Date
March 1989
Edition
36868
Material Type
Research report
Field
Sustainable Construction
Author
Hailey, J.R.T.
Whittall, K.P.
Close, L.M.
MacKay, A.L.
Lyons, M.J.
Date
March 1989
Edition
36868
Material Type
Research report
Physical Description
39 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Nuclear magnetic resonance (NMR)
Spectroscopy
Wood
Identification
Series Number
CFS No. 25
contract no. 1212K001
W-749
Location
Vancouver, British Columbia
Language
English
Abstract
Summary included
Identification - Woods
Spectroscopy - Nuclear magnetic resonance
Documents
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Energy dispersive x-ray microanalysis of sticker-stained wood

https://library.fpinnovations.ca/en/permalink/fpipub38317
Author
Keith, C.T.
Chauret, Gilles
Date
February 1989
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Keith, C.T.
Chauret, Gilles
Date
February 1989
Material Type
Research report
Physical Description
9 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Sticker stains
Stain
Spectroscopy
Series Number
CFS project no.25a
Project no.3712K206
E-1036
Location
Ottawa, Ontario
Language
English
Abstract
Sticker stain
Stains - Chemical
Xray spectroscopy - Wood staining
Documents
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Enhanced wood products

https://library.fpinnovations.ca/en/permalink/fpipub41119
Author
Cui, F.
Date
March 1995
Material Type
Research report
Field
Sustainable Construction
Author
Cui, F.
Contributor
Canada. Canadian Forest Service.
Date
March 1995
Material Type
Research report
Physical Description
30 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Weathering
Wood decay
Spectroscopy
Infrared spectroscopy
Series Number
Canadian Forest Service No. 37
Contract no. 1712K031
W-1189
Location
Vancouver, British Columbia
Language
English
Abstract
Wood is very susceptible to weathering when used outdoors because of its inherent nature of UV degradability and dimensional instability. Without effective protection, wood rapidly loses its attractive natural appearance and becomes unserviceable within a few years. Protection has traditionally taken the form of system design to avoid trapping water, and surface finishing to shed water and prevent UV degradation. Unfortunately, surface finishes such as paint and stain last only a few years and the need to repeatedly refinish wood has led to the perception of wood products as high maintenance building materials. The objective of this project is to develop fundamental information leading to processes which can be used by our industry to produce high- performance wood products with extended service lives and low maintenance requirements. The project has been focusing on UV resistance to the present stage. Wood samples were treated with chemicals that have UV stabilizing properties and their weathering performance evaluated by both accelerated and natural weathering tests. UV-visible spectroscopy was used to monitor the color change, and FTIR (Fourier Transform Infrared spectroscopy) was used to monitor lignin degradation on the wood surface. Rate of erosion, water absorption, and dimensional change during accelerated weathering was also studied. Preliminary weathering results are discussed in this report and recommendations made for further research.
Spectroscopy, Infrared
Spectroscopy, Ultraviolet
Finishes - Decay
Weathering
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Evaluation of near infrared spectroscopy as a potential quality assurance tool for the wood preservation industry

https://library.fpinnovations.ca/en/permalink/fpipub42475
Author
Stirling, Rod
Date
February 2012
Material Type
Research report
Field
Sustainable Construction
Author
Stirling, Rod
Date
February 2012
Material Type
Research report
Physical Description
17 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Spectroscopy
Retention
Preservatives penetration
Preservatives
Penetration
Measurement
Infrared spectroscopy
Series Number
Future Focus No. TT1.1.07
W-2881
Location
Vancouver, British Columbia
Language
English
Abstract
Wood preservation standards typically specify quality assurance procedures to determine whether wood is adequately treated. As a result there is a need to identify sapwood and heartwood, and measure preservative retention and penetration. For spruce and hem-fir there are no reliable methods to differentiate sapwood and heartwood. For carbon-based preservatives, preservative retention measurement typically requires GC or HPLC analyses; the only methods available to determine penetration involve detecting a surrogate in the formulation rather than the active ingredients. Multivariate models based on near infrared (NIR) spectra have been used to predict a wide range of wood properties over the past 20 years. The present research evaluates the potential use of NIR-based models as quality assurance tools for the wood preservation industry. Models were developed to differentiate hemlock and amabilis fir sapwood and heartwood. Attempts to differentiate spruce sapwood and heartwood were unsuccessful. NIR-based models were also able to differentiate untreated wood from wood treated with DDACarbonate and wood treated with tebuconazole. Models developed to predict DDACarbonate and tebuconazole retention were moderately accurate, but likely not precise enough to replace current quantitative assays. However, the sensitivity to the presence of the actives may be sufficient for estimating preservative penetration. Further work is needed using small probes suitable for scanning increment cores to adapt this technology for industrial use. In addition to conventional NIR, hyperspectral images were obtained to differentiate untreated wood from DDACarbonate- and tebuconazole-treated wood, but accurate calibrations could not be developed.
Preservatives - Penetration - Measurement
Preservatives - Retention - Measurement
Spectroscopy, Infrared
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Fourier transform infrared (FTIR) spectroscopy for species separation

https://library.fpinnovations.ca/en/permalink/fpipub36954
Author
Nault, J.R.
Date
March 1989
Material Type
Research report
Field
Sustainable Construction
Author
Nault, J.R.
Date
March 1989
Material Type
Research report
Physical Description
22 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Spectroscopy
Softwoods
Infrared spectroscopy
Wood
Identification
Series Number
CFS No. 48
contract no.89-512K410
W-664
Location
Vancouver, British Columbia
Language
English
Abstract
Summary included
Spectroscopy, Infrared
Identification - Woods
Softwoods - Identification
Documents
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Long range development plan for internal scanning using magnetic resonance

https://library.fpinnovations.ca/en/permalink/fpipub36866
Author
Hailey, J.R.T.
Date
March 1989
Material Type
Research report
Field
Wood Manufacturing & Digitalization
OF LOGS MR Spectroscopy of Wood - Species and Wood characteristics Identifiable Wood Characteristics
Author
Hailey, J.R.T.
Date
March 1989
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Nuclear magnetic resonance (NMR)
Spectroscopy
Identification
Wood
Series Number
CFS No. 25
contract no.1212K001
W-747
Location
Vancouver, British Columbia
Language
English
Abstract
Spectroscopy - Nuclear magnetic resonance
Identification - Woods
Documents
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NMR determination of the physiological water distribution in wood during drying

https://library.fpinnovations.ca/en/permalink/fpipub37134
Author
Menon, R.S.
Hailey, J.R.T.
Swanson, J.S.
Date
March 1986
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Menon, R.S.
Hailey, J.R.T.
Swanson, J.S.
Date
March 1986
Material Type
Research report
Physical Description
24 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Nuclear magnetic resonance (NMR)
Spectroscopy
Series Number
CFS No. 15;02-12-12-001
W-370
Location
Vancouver, British Columbia
Language
English
Abstract
Moisture content
Spectroscopy, Nuclear magnetic resonance
Moisture determination - Spectroscopy
Documents
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Prediction of extractives content from western redcedar increment cores and decay resistance in sample blocks by near infrared spectroscopy

https://library.fpinnovations.ca/en/permalink/fpipub42482
Author
Stirling, Rod
Morris, Paul I.
Date
March 2012
Material Type
Research report
Field
Sustainable Construction
Author
Stirling, Rod
Morris, Paul I.
Date
March 2012
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Thuja plicata
Spectroscopy
Infrared spectroscopy
Analysis
Series Number
W-2891
Location
Vancouver, British Columbia
Language
English
Abstract
Recent work suggested that near infrared (NIR) spectroscopy may be able to estimate extractive concentration in western redcedar (WRC) heartwood. This would facilitate the screening of breeding stock that will produce durable heartwood. Increment cores from 50 trees were scanned and analysed for extractives content to evaluate existing models. Extractives data were not accurately predicted by the developed models. This was likely due in part to the much smaller range of extractives in the increment core data set. Subsequent partial least squares (PLS) models based on the increment core data set confirmed that NIR is not sensitive enough to small variations in extractives to differentiate wood with small or medium differences in extractives content. The present work also examined the ability of PLS models to predict decay resistance from NIR spectra. The developed models were not able to accurately predict weight loss caused by Coniophora puteana in a soil block test. Correlations between extractives data and decay resistance data were very weak. This weakness may have been exacerbated by the leaching and biodegradation steps that would have reduced the concentration of thujaplicins in the samples.
Spectroscopy, Infrared
Thuja plicata - Chemical analysis
Thuja plicata - Extractives
Documents
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16 records – page 1 of 2.