International Business & Economics Research Journal (IBER), 2011
The concept of structuration is still under construction. After tracking its development to date,... more The concept of structuration is still under construction. After tracking its development to date, this paper asks what happens to the concept when it is applied to understanding work behaviour in an organisational context. The concept of structuration is made more elaborate by introducing a new constituent to the process, the element of preferential role. What influence, if any do the actuations of preferential roles by individuals have on the social structure and of the collective group behaviour? The paper serves as a model for anyone who seeks ways of testing the concept of structuration in practice.The research reported in this paper suggests an answer to a practical question thrown up by the concept of structuration. Structuration is one way of resolving the opposition between those collectivists who seek to observe structure as a determinate of individual behaviour and those individualists who see group behaviour as nothing more than the sum total of individual behaviours. Ant...
Salinity and fresh water are two sides of the same coin and most conveniently measured by electri... more Salinity and fresh water are two sides of the same coin and most conveniently measured by electrical conductivity; therefore they can be mapped rapidly, in three dimensions, using airborne electromagnetics (AEM). Recent developments in AEM, in particular the calibration of airborne data against field measurements, lend new insights into salinity, groundwater flow systems and water resources. Mapping of soil and
We describe the presentation, exam findings, surgical repair techniques, and short-term outcomes ... more We describe the presentation, exam findings, surgical repair techniques, and short-term outcomes in a series of patients with isolated inferior labral tears. A retrospective chart review was performed at a large academic medical center. Isolated inferior labral tears were defined as between the 4 o'clock and 8 o'clock position of the glenoid as determined by direct arthroscopic visualization. Tears that were smaller were also included but were required to cross the 6 o'clock point, having anterior and posterior components. Patients were excluded if they had any other pathology or treatment of the shoulder. 1-year follow-up was required. Of the 17 patients who met inclusion criteria for review, 12 were available for a minimum 1-year follow-up. Average total follow-up for patients to complete the phone interview/Oxford Shoulder Instability Score (OSIS) was an average of 37.7 months (range: 16-79 months). Postoperatively, all reported symptom improvement or resolution since...
Background: Acromioclavicular joint dislocations are common orthopaedic injuries. Numerous operat... more Background: Acromioclavicular joint dislocations are common orthopaedic injuries. Numerous operative techniques have been described, but the gold standard has yet to be defined. The goal of fixation is to create a stiff and strong reconstruction of the coracoclavicular ligaments to provide optimal stability. The modified Weaver-Dunn is the traditional surgical procedure. However, due to the high rate of recurrent instability
ABSTRACTThe rigid-rod polymer system poly(phenylenebenzobisthiazole), designated as PBZT, has con... more ABSTRACTThe rigid-rod polymer system poly(phenylenebenzobisthiazole), designated as PBZT, has considerable potential in materials engineering. The vacuum thermal behavior of this system and various substituted analogues, including methyl-, phenyl-, and benzothiazolyl-substituted members, has been studied using the combined techniques of thermogravimetry and mass spectroscopy (TG-MS).Primary volatile products identified from the PBZT series include H2S, HCN, CS2, NH3, C6H5CN, C6H4(CN)2, and HSCN. The presence of pendant groups such as methyl, phenyl, or benzothiazolyl results in the evolution of methane, benzene, or benzothiazole in low-temperature degradation processes. The relative abundance and temporal sequence of these gases which are evolved during slow heating in vacuum provide valuable information concerning thermal stability.The implications of the identification and study of evolved gases toward the understanding of the mechanisms of heat treating of rigid-rod polymer syste...
International Journal of Applied Earth Observation and Geoinformation, 2000
Although airborne geophysical techniques have been used at the catchment scale to map salt stores... more Although airborne geophysical techniques have been used at the catchment scale to map salt stores, palaeochannels and soil variability few studies have evaluated the usefulness of these techniques to provide detailed, paddock-scale, land management tools.In this paper, we examine two approaches to see whether airborne electromagnetics (AEM) can identify salinity problems at the paddock-scale: (1) direct comparison between airborne and
Pressure-sensitive paint (PSP) is playing an important role in aerodynamic testing. Its use provi... more Pressure-sensitive paint (PSP) is playing an important role in aerodynamic testing. Its use provides a number of advantages over discrete pressure taps traditionally used on conventional wind tunnel models: (i) obtaining continuous quantitative pressure distributions over a surface; (ii) visualizing dynamic flow processes that measure areas not possible with conventional pressure taps (e.g. thin trailing edges); and (iii) real time
The purpose of this study was to determine the most accurate imaging modality to quantify glenoid... more The purpose of this study was to determine the most accurate imaging modality to quantify glenoid bone loss in recurrent anterior shoulder instability. This will allow the best preoperative prediction for patients needing a bone graft. Seven fresh frozen shoulder cadavers were imaged with radiographs, magnetic resonance imaging (MRI), computed tomography (CT), and 3-dimensional CT (3-D CT). Native shoulders were imaged, and 3 sequential anterior-inferior glenoid defects were created, measured, and reimaged. Defect sizes were <12.5%, 12.5% to 27%, and >27%. Four blinded evaluators (2 musculoskeletal radiologists, 2 shoulder fellowship-trained surgeons) reviewed the 112 image sets and estimated the percentage of glenoid bone loss. Images were scrambled and re-reviewed by the same observers 2 months later to determine intraobserver reliability. Pearson correlation coefficients between predicted vs true bone loss across all 4 raters were 0.875 (3-D CT), 0.831 (CT), 0.693 (MRI), and 0.457 (x-ray imaging). Prediction errors (PE) were (mean ± SD in percentages) 3-D CT (-3.3 ± -6.6), CT (-3.7 ± -8.0), MRI (-2.75 ± -10.6), and x-ray images (-6.9 ± -13.1). Mean PE values were not significantly different among 3-D CT, CT, and MRI; however, the PE SDs were similar among the 4 evaluators for 3-D CT and lower than all other imaging techniques. Prediction based on x-ray images had the largest PE and SD. Covariance parameters revealed large variances for shoulders for MRI and x-ray imaging. The intraobserver intraclass correlation coefficients were 0.947 (3-D CT), 0.927 (CT), 0.837 (MRI), and 0.726 (x-ray image). The most accurate imaging modality in predicting glenoid bone loss among the 4 blinded independent evaluators was 3-D CT.
The purpose of this research was to provide an overview of the current state of intergenerational... more The purpose of this research was to provide an overview of the current state of intergenerational programming in one Canadian city. One-hundred and seven individuals in charge of programming in youth and seniors' organizations completed a telephone survey about intergenerational programs. More than one-third of organizations surveyed reported offering intergenerational programs, and the majority of these perceived their program to
The distribution of relative abundances between the species of a plant community has been remarka... more The distribution of relative abundances between the species of a plant community has been remarkably little analysed. We examine differences in relative abundance distribution (RAD) between different soil fertility levels, and trends through time in the development of a ...
Surface and bulk fouling of four Jet-A fuels has been studied at 185 °C. Results are reported for... more Surface and bulk fouling of four Jet-A fuels has been studied at 185 °C. Results are reported for two experimental configurations. In the first, fuel is stressed in a single-pass heat exchanger designed to simulate the application of aviation fuel as a heat sink for cooling aircraft ...
Posttraumatic anterior shoulder instability is associated with anterior glenoid bone loss, contri... more Posttraumatic anterior shoulder instability is associated with anterior glenoid bone loss, contributing to recurrence. Accurate preoperative quantification of bone loss is paramount to avoid failure of a soft tissue stabilization procedure as bone reconstruction is recommended for glenoid defects greater than 20% to 27%. We determined whether radiography, MRI, or CT was most reliable to quantify glenoid bone loss in recurrent anterior shoulder instability. Seven intact fresh-frozen human cadaveric shoulders were imaged with radiography, MRI, CT, and three-dimensional (3-D) CT. Three sequential anterior glenoid defects then were created, measured, and the shoulders reimaged after each defect. Defect sizes were less than 12%, 12% to 25%, and 25% to 40%. The gold standard measurement was determined by comparing measurements taken on the cadaver by two surgeons using digital calipers with the measurements determined by using electronic digital calipers on the 3-D CT. This measurement was used for comparison of all estimations by the evaluators. Twelve independent blinded evaluators reviewed the 112 image sets and estimated the percent of glenoid bone loss. Images were scrambled and rereviewed by the same observers 2 months later to determine intraobserver reliability. We determined reliability with kappa values. Kappa values between predicted bone loss versus true loss (determined by our gold standard measurements) across all 12 raters for each modality were: 3-D CT, 0.50; CT, 0.40; MRI, 0.27; and radiographs, 0.15. Interobserver agreement (kappa) values were: 3-D CT, 0.54; CT, 0.47; MRI, 0.31; and radiographs, 0.15. The intraobserver agreement (kappa) values were: 3-D CT, 0.59; CT, 0.64; MRI, 0.51; and radiographs, 0.45. Three-dimensional CT was the most reliable imaging modality for predicting glenoid bone loss. Regular CT was the second most reliable and reproducible modality.
International Business & Economics Research Journal (IBER), 2011
The concept of structuration is still under construction. After tracking its development to date,... more The concept of structuration is still under construction. After tracking its development to date, this paper asks what happens to the concept when it is applied to understanding work behaviour in an organisational context. The concept of structuration is made more elaborate by introducing a new constituent to the process, the element of preferential role. What influence, if any do the actuations of preferential roles by individuals have on the social structure and of the collective group behaviour? The paper serves as a model for anyone who seeks ways of testing the concept of structuration in practice.The research reported in this paper suggests an answer to a practical question thrown up by the concept of structuration. Structuration is one way of resolving the opposition between those collectivists who seek to observe structure as a determinate of individual behaviour and those individualists who see group behaviour as nothing more than the sum total of individual behaviours. Ant...
Salinity and fresh water are two sides of the same coin and most conveniently measured by electri... more Salinity and fresh water are two sides of the same coin and most conveniently measured by electrical conductivity; therefore they can be mapped rapidly, in three dimensions, using airborne electromagnetics (AEM). Recent developments in AEM, in particular the calibration of airborne data against field measurements, lend new insights into salinity, groundwater flow systems and water resources. Mapping of soil and
We describe the presentation, exam findings, surgical repair techniques, and short-term outcomes ... more We describe the presentation, exam findings, surgical repair techniques, and short-term outcomes in a series of patients with isolated inferior labral tears. A retrospective chart review was performed at a large academic medical center. Isolated inferior labral tears were defined as between the 4 o'clock and 8 o'clock position of the glenoid as determined by direct arthroscopic visualization. Tears that were smaller were also included but were required to cross the 6 o'clock point, having anterior and posterior components. Patients were excluded if they had any other pathology or treatment of the shoulder. 1-year follow-up was required. Of the 17 patients who met inclusion criteria for review, 12 were available for a minimum 1-year follow-up. Average total follow-up for patients to complete the phone interview/Oxford Shoulder Instability Score (OSIS) was an average of 37.7 months (range: 16-79 months). Postoperatively, all reported symptom improvement or resolution since...
Background: Acromioclavicular joint dislocations are common orthopaedic injuries. Numerous operat... more Background: Acromioclavicular joint dislocations are common orthopaedic injuries. Numerous operative techniques have been described, but the gold standard has yet to be defined. The goal of fixation is to create a stiff and strong reconstruction of the coracoclavicular ligaments to provide optimal stability. The modified Weaver-Dunn is the traditional surgical procedure. However, due to the high rate of recurrent instability
ABSTRACTThe rigid-rod polymer system poly(phenylenebenzobisthiazole), designated as PBZT, has con... more ABSTRACTThe rigid-rod polymer system poly(phenylenebenzobisthiazole), designated as PBZT, has considerable potential in materials engineering. The vacuum thermal behavior of this system and various substituted analogues, including methyl-, phenyl-, and benzothiazolyl-substituted members, has been studied using the combined techniques of thermogravimetry and mass spectroscopy (TG-MS).Primary volatile products identified from the PBZT series include H2S, HCN, CS2, NH3, C6H5CN, C6H4(CN)2, and HSCN. The presence of pendant groups such as methyl, phenyl, or benzothiazolyl results in the evolution of methane, benzene, or benzothiazole in low-temperature degradation processes. The relative abundance and temporal sequence of these gases which are evolved during slow heating in vacuum provide valuable information concerning thermal stability.The implications of the identification and study of evolved gases toward the understanding of the mechanisms of heat treating of rigid-rod polymer syste...
International Journal of Applied Earth Observation and Geoinformation, 2000
Although airborne geophysical techniques have been used at the catchment scale to map salt stores... more Although airborne geophysical techniques have been used at the catchment scale to map salt stores, palaeochannels and soil variability few studies have evaluated the usefulness of these techniques to provide detailed, paddock-scale, land management tools.In this paper, we examine two approaches to see whether airborne electromagnetics (AEM) can identify salinity problems at the paddock-scale: (1) direct comparison between airborne and
Pressure-sensitive paint (PSP) is playing an important role in aerodynamic testing. Its use provi... more Pressure-sensitive paint (PSP) is playing an important role in aerodynamic testing. Its use provides a number of advantages over discrete pressure taps traditionally used on conventional wind tunnel models: (i) obtaining continuous quantitative pressure distributions over a surface; (ii) visualizing dynamic flow processes that measure areas not possible with conventional pressure taps (e.g. thin trailing edges); and (iii) real time
The purpose of this study was to determine the most accurate imaging modality to quantify glenoid... more The purpose of this study was to determine the most accurate imaging modality to quantify glenoid bone loss in recurrent anterior shoulder instability. This will allow the best preoperative prediction for patients needing a bone graft. Seven fresh frozen shoulder cadavers were imaged with radiographs, magnetic resonance imaging (MRI), computed tomography (CT), and 3-dimensional CT (3-D CT). Native shoulders were imaged, and 3 sequential anterior-inferior glenoid defects were created, measured, and reimaged. Defect sizes were <12.5%, 12.5% to 27%, and >27%. Four blinded evaluators (2 musculoskeletal radiologists, 2 shoulder fellowship-trained surgeons) reviewed the 112 image sets and estimated the percentage of glenoid bone loss. Images were scrambled and re-reviewed by the same observers 2 months later to determine intraobserver reliability. Pearson correlation coefficients between predicted vs true bone loss across all 4 raters were 0.875 (3-D CT), 0.831 (CT), 0.693 (MRI), and 0.457 (x-ray imaging). Prediction errors (PE) were (mean ± SD in percentages) 3-D CT (-3.3 ± -6.6), CT (-3.7 ± -8.0), MRI (-2.75 ± -10.6), and x-ray images (-6.9 ± -13.1). Mean PE values were not significantly different among 3-D CT, CT, and MRI; however, the PE SDs were similar among the 4 evaluators for 3-D CT and lower than all other imaging techniques. Prediction based on x-ray images had the largest PE and SD. Covariance parameters revealed large variances for shoulders for MRI and x-ray imaging. The intraobserver intraclass correlation coefficients were 0.947 (3-D CT), 0.927 (CT), 0.837 (MRI), and 0.726 (x-ray image). The most accurate imaging modality in predicting glenoid bone loss among the 4 blinded independent evaluators was 3-D CT.
The purpose of this research was to provide an overview of the current state of intergenerational... more The purpose of this research was to provide an overview of the current state of intergenerational programming in one Canadian city. One-hundred and seven individuals in charge of programming in youth and seniors' organizations completed a telephone survey about intergenerational programs. More than one-third of organizations surveyed reported offering intergenerational programs, and the majority of these perceived their program to
The distribution of relative abundances between the species of a plant community has been remarka... more The distribution of relative abundances between the species of a plant community has been remarkably little analysed. We examine differences in relative abundance distribution (RAD) between different soil fertility levels, and trends through time in the development of a ...
Surface and bulk fouling of four Jet-A fuels has been studied at 185 °C. Results are reported for... more Surface and bulk fouling of four Jet-A fuels has been studied at 185 °C. Results are reported for two experimental configurations. In the first, fuel is stressed in a single-pass heat exchanger designed to simulate the application of aviation fuel as a heat sink for cooling aircraft ...
Posttraumatic anterior shoulder instability is associated with anterior glenoid bone loss, contri... more Posttraumatic anterior shoulder instability is associated with anterior glenoid bone loss, contributing to recurrence. Accurate preoperative quantification of bone loss is paramount to avoid failure of a soft tissue stabilization procedure as bone reconstruction is recommended for glenoid defects greater than 20% to 27%. We determined whether radiography, MRI, or CT was most reliable to quantify glenoid bone loss in recurrent anterior shoulder instability. Seven intact fresh-frozen human cadaveric shoulders were imaged with radiography, MRI, CT, and three-dimensional (3-D) CT. Three sequential anterior glenoid defects then were created, measured, and the shoulders reimaged after each defect. Defect sizes were less than 12%, 12% to 25%, and 25% to 40%. The gold standard measurement was determined by comparing measurements taken on the cadaver by two surgeons using digital calipers with the measurements determined by using electronic digital calipers on the 3-D CT. This measurement was used for comparison of all estimations by the evaluators. Twelve independent blinded evaluators reviewed the 112 image sets and estimated the percent of glenoid bone loss. Images were scrambled and rereviewed by the same observers 2 months later to determine intraobserver reliability. We determined reliability with kappa values. Kappa values between predicted bone loss versus true loss (determined by our gold standard measurements) across all 12 raters for each modality were: 3-D CT, 0.50; CT, 0.40; MRI, 0.27; and radiographs, 0.15. Interobserver agreement (kappa) values were: 3-D CT, 0.54; CT, 0.47; MRI, 0.31; and radiographs, 0.15. The intraobserver agreement (kappa) values were: 3-D CT, 0.59; CT, 0.64; MRI, 0.51; and radiographs, 0.45. Three-dimensional CT was the most reliable imaging modality for predicting glenoid bone loss. Regular CT was the second most reliable and reproducible modality.
Uploads
Papers by Grant Jones