The Experts below are selected from a list of 8247 Experts worldwide ranked by ideXlab platform
C E Chapman - One of the best experts on this subject based on the ideXlab platform.
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a high stability fluxgate magnetic gradiometer for shallow geophysical survey applications
Archaeological Prospection, 2004Co-Authors: G Bartington, C E ChapmanAbstract:The detection of induced and remanent magnetization of subsurface features provides a rapid survey technique. Rejection of the unwanted geomagnetic field and its diurnal variations is accomplished by adopting a gradient magnetometer arrangement in which only the difference signal from two magnetometers, separated by a short distance, is recorded. Nuclear resonance scalar magnetometers offer high sensitivity but have higher power requirements and therefore suffer a weight penalty relative to fluxgate types. Fluxgate magnetometers are vector sensing and their sensitivity is limited, mainly by thermally induced mechanical and electronic drift. This paper describes the development of a 1-m separation, vertical component, fluxgate magnetometer that alleviates these problems. Single and multiple array gradiometer configurations are presented, together with a description of data Logging Software developed to enhance survey efficiency. Survey data acquired during trials and testing are presented. The ergonomics of portable instrument surveying is also discussed. Copyright © 2003 John Wiley & Sons, Ltd.
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A high‐stability fluxgate magnetic gradiometer for shallow geophysical survey applications
Archaeological Prospection, 2004Co-Authors: G Bartington, C E ChapmanAbstract:The detection of induced and remanent magnetization of subsurface features provides a rapid survey technique. Rejection of the unwanted geomagnetic field and its diurnal variations is accomplished by adopting a gradient magnetometer arrangement in which only the difference signal from two magnetometers, separated by a short distance, is recorded. Nuclear resonance scalar magnetometers offer high sensitivity but have higher power requirements and therefore suffer a weight penalty relative to fluxgate types. Fluxgate magnetometers are vector sensing and their sensitivity is limited, mainly by thermally induced mechanical and electronic drift. This paper describes the development of a 1-m separation, vertical component, fluxgate magnetometer that alleviates these problems. Single and multiple array gradiometer configurations are presented, together with a description of data Logging Software developed to enhance survey efficiency. Survey data acquired during trials and testing are presented. The ergonomics of portable instrument surveying is also discussed. Copyright © 2003 John Wiley & Sons, Ltd.
G Bartington - One of the best experts on this subject based on the ideXlab platform.
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a high stability fluxgate magnetic gradiometer for shallow geophysical survey applications
Archaeological Prospection, 2004Co-Authors: G Bartington, C E ChapmanAbstract:The detection of induced and remanent magnetization of subsurface features provides a rapid survey technique. Rejection of the unwanted geomagnetic field and its diurnal variations is accomplished by adopting a gradient magnetometer arrangement in which only the difference signal from two magnetometers, separated by a short distance, is recorded. Nuclear resonance scalar magnetometers offer high sensitivity but have higher power requirements and therefore suffer a weight penalty relative to fluxgate types. Fluxgate magnetometers are vector sensing and their sensitivity is limited, mainly by thermally induced mechanical and electronic drift. This paper describes the development of a 1-m separation, vertical component, fluxgate magnetometer that alleviates these problems. Single and multiple array gradiometer configurations are presented, together with a description of data Logging Software developed to enhance survey efficiency. Survey data acquired during trials and testing are presented. The ergonomics of portable instrument surveying is also discussed. Copyright © 2003 John Wiley & Sons, Ltd.
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A high‐stability fluxgate magnetic gradiometer for shallow geophysical survey applications
Archaeological Prospection, 2004Co-Authors: G Bartington, C E ChapmanAbstract:The detection of induced and remanent magnetization of subsurface features provides a rapid survey technique. Rejection of the unwanted geomagnetic field and its diurnal variations is accomplished by adopting a gradient magnetometer arrangement in which only the difference signal from two magnetometers, separated by a short distance, is recorded. Nuclear resonance scalar magnetometers offer high sensitivity but have higher power requirements and therefore suffer a weight penalty relative to fluxgate types. Fluxgate magnetometers are vector sensing and their sensitivity is limited, mainly by thermally induced mechanical and electronic drift. This paper describes the development of a 1-m separation, vertical component, fluxgate magnetometer that alleviates these problems. Single and multiple array gradiometer configurations are presented, together with a description of data Logging Software developed to enhance survey efficiency. Survey data acquired during trials and testing are presented. The ergonomics of portable instrument surveying is also discussed. Copyright © 2003 John Wiley & Sons, Ltd.
Marco Gamba - One of the best experts on this subject based on the ideXlab platform.
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boris a free versatile open source event Logging Software for video audio coding and live observations
Methods in Ecology and Evolution, 2016Co-Authors: Olivier Friard, Marco GambaAbstract:Summary Quantitative aspects of the study of animal and human behaviour are increasingly relevant to test hypotheses and find empirical support for them. At the same time, photo and video cameras can store a large number of video recordings and are often used to monitor the subjects remotely. Researchers frequently face the need to code considerable quantities of video recordings with relatively flexible Software, often constrained by species-specific options or exact settings. BORIS is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations. Being open to user-specific settings, the program allows a project-based ethogram to be defined that can then be shared with collaborators, or can be imported or modified. Projects created in BORIS can include a list of observations, and each observation may include one or two videos (e.g. simultaneous screening of visual stimuli and the subject being tested; recordings from different sides of an aquarium). Once the user has set an ethogram, including state or point events or both, coding can be performed using previously assigned keys on the computer keyboard. BORIS allows definition of an unlimited number of events (states/point events) and subjects. Once the coding process is completed, the program can extract a time-budget or single or grouped observations automatically and present an at-a-glance summary of the main behavioural features. The observation data and time-budget analysis can be exported in many common formats (TSV, CSV, ODF, XLS, SQL and JSON). The observed events can be plotted and exported in various graphic formats (SVG, PNG, JPG, TIFF, EPS and PDF).
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BORIS: a free, versatile open‐source event‐Logging Software for video/audio coding and live observations
Methods in Ecology and Evolution, 2016Co-Authors: Olivier Friard, Marco GambaAbstract:Summary Quantitative aspects of the study of animal and human behaviour are increasingly relevant to test hypotheses and find empirical support for them. At the same time, photo and video cameras can store a large number of video recordings and are often used to monitor the subjects remotely. Researchers frequently face the need to code considerable quantities of video recordings with relatively flexible Software, often constrained by species-specific options or exact settings. BORIS is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations. Being open to user-specific settings, the program allows a project-based ethogram to be defined that can then be shared with collaborators, or can be imported or modified. Projects created in BORIS can include a list of observations, and each observation may include one or two videos (e.g. simultaneous screening of visual stimuli and the subject being tested; recordings from different sides of an aquarium). Once the user has set an ethogram, including state or point events or both, coding can be performed using previously assigned keys on the computer keyboard. BORIS allows definition of an unlimited number of events (states/point events) and subjects. Once the coding process is completed, the program can extract a time-budget or single or grouped observations automatically and present an at-a-glance summary of the main behavioural features. The observation data and time-budget analysis can be exported in many common formats (TSV, CSV, ODF, XLS, SQL and JSON). The observed events can be plotted and exported in various graphic formats (SVG, PNG, JPG, TIFF, EPS and PDF).
Diana Mazgutova - One of the best experts on this subject based on the ideXlab platform.
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effects of task complexity on l2 writing behaviors and linguistic complexity
Language Learning, 2017Co-Authors: Andrea Revesz, Nektariaefstathia Kourtali, Diana MazgutovaAbstract:This study investigated whether task complexity influences second language (L2) writers’ fluency, pausing, and revision behaviors and the cognitive processes underlying these behaviors; whether task complexity affects linguistic complexity of written output; and whether relationships between writing behaviors and linguistic complexity are moderated by task complexity. Participants were 73 advanced L2 writers, who completed simple or complex essay tasks. Task complexity was operationalized as the absence versus presence of content support. Participants’ writing behaviors were recorded via keystroke Logging Software. Four writers, drawn from groups performing simple and complex tasks, additionally engaged in stimulated recall. Content support was found to lead to less pausing, more revision, and increased linguistic complexity. When content support was absent, more frequent pauses and revisions were associated with less sophisticated lexis. These results, combined with stimulated recall comments, suggest that content support likely reduced processing burden on planning processes, facilitating attention to linguistic encoding.
Olivier Friard - One of the best experts on this subject based on the ideXlab platform.
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boris a free versatile open source event Logging Software for video audio coding and live observations
Methods in Ecology and Evolution, 2016Co-Authors: Olivier Friard, Marco GambaAbstract:Summary Quantitative aspects of the study of animal and human behaviour are increasingly relevant to test hypotheses and find empirical support for them. At the same time, photo and video cameras can store a large number of video recordings and are often used to monitor the subjects remotely. Researchers frequently face the need to code considerable quantities of video recordings with relatively flexible Software, often constrained by species-specific options or exact settings. BORIS is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations. Being open to user-specific settings, the program allows a project-based ethogram to be defined that can then be shared with collaborators, or can be imported or modified. Projects created in BORIS can include a list of observations, and each observation may include one or two videos (e.g. simultaneous screening of visual stimuli and the subject being tested; recordings from different sides of an aquarium). Once the user has set an ethogram, including state or point events or both, coding can be performed using previously assigned keys on the computer keyboard. BORIS allows definition of an unlimited number of events (states/point events) and subjects. Once the coding process is completed, the program can extract a time-budget or single or grouped observations automatically and present an at-a-glance summary of the main behavioural features. The observation data and time-budget analysis can be exported in many common formats (TSV, CSV, ODF, XLS, SQL and JSON). The observed events can be plotted and exported in various graphic formats (SVG, PNG, JPG, TIFF, EPS and PDF).
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BORIS: a free, versatile open‐source event‐Logging Software for video/audio coding and live observations
Methods in Ecology and Evolution, 2016Co-Authors: Olivier Friard, Marco GambaAbstract:Summary Quantitative aspects of the study of animal and human behaviour are increasingly relevant to test hypotheses and find empirical support for them. At the same time, photo and video cameras can store a large number of video recordings and are often used to monitor the subjects remotely. Researchers frequently face the need to code considerable quantities of video recordings with relatively flexible Software, often constrained by species-specific options or exact settings. BORIS is a free, open-source and multiplatform standalone program that allows a user-specific coding environment to be set for a computer-based review of previously recorded videos or live observations. Being open to user-specific settings, the program allows a project-based ethogram to be defined that can then be shared with collaborators, or can be imported or modified. Projects created in BORIS can include a list of observations, and each observation may include one or two videos (e.g. simultaneous screening of visual stimuli and the subject being tested; recordings from different sides of an aquarium). Once the user has set an ethogram, including state or point events or both, coding can be performed using previously assigned keys on the computer keyboard. BORIS allows definition of an unlimited number of events (states/point events) and subjects. Once the coding process is completed, the program can extract a time-budget or single or grouped observations automatically and present an at-a-glance summary of the main behavioural features. The observation data and time-budget analysis can be exported in many common formats (TSV, CSV, ODF, XLS, SQL and JSON). The observed events can be plotted and exported in various graphic formats (SVG, PNG, JPG, TIFF, EPS and PDF).
