title: Tracking jockeys in a cluttered environment with group dynamics

authors: Hedayati, Mohammad

abstract: This project aims to detect and track jockeys at the turning point of the horse races. The detection and tracking of the objects is a very challenging task in a crowded environment such as horse racing due to occlusion. However, in the horse race, the jockeys follow each other's paths and move as a slowly changing group. This group dynamic gives an important cue to approximate the location of obscured jockeys. This paper proposes a novel approach to handle occlusion by the integration of the group dynamic into jockeys tracking framework. The experimental result shows the effect of group dynamics on the tracking performance against partial and full occlusions.

text: Tracking jockeys in a cluttered environment with group dynamics This project aims to detect and track jockeys at the turning point of the horse races. The detection and tracking of the objects is a very challenging task in a crowded environment such as horse racing due to occlusion. However, in the horse race, the jockeys follow each other's paths and move as a slowly changing group. This group dynamic gives an important cue to approximate the location of obscured jockeys. This paper proposes a novel approach to handle occlusion by the integration of the group dynamic into jockeys tracking framework. The experimental result shows the effect of group dynamics on the tracking performance against partial and full occlusions.

year: 2019

title: Dispersal of dredging plumes in Tauranga Harbour, New Zealand: A field study

authors: Cussioli, Mariana C.

abstract: Water quality standards associated with dredging have become more stringent, requiring better monitoring and prediction. Here, we describe the dynamics and development of plumes generated during two dredging cycles and how they vary with respect to time and distance from the dredging activity. Backscatter signals were measured using a boat-mounted acoustic Doppler current profiler (ADCP) and total suspended solid concentrations (TSS) were determined from water samples. Results show that background TSS ranged from 7 to 9 mg l‒1 whilst dredging plumes exhibited a vertical gradient of TSS ranging from 9 to 15 mg l‒1 near the surface (0–2 m), and 24 to 70 mg l‒1 near the bottom (10–12 m). ADCP transects conducted during and after dredging showed that the plume dissipated from the dredged area within 1 hour. Final transects (~1 hour after the dredging ended), revealed backscatter signals ranging from background levels to ~1.2 times greater than the background. Based on TSS concentrations and time for plume dispersion, previous studies indicated that a plume with duration of 1 to 2 hours and TSS concentration around 70 mg l‒1 is below the threshold for causing serious impacts to the biota; therefore, only minor effects can be expected for the two dredging plumes monitored.

text: Dispersal of dredging plumes in Tauranga Harbour, New Zealand: A field study Water quality standards associated with dredging have become more stringent, requiring better monitoring and prediction. Here, we describe the dynamics and development of plumes generated during two dredging cycles and how they vary with respect to time and distance from the dredging activity. Backscatter signals were measured using a boat-mounted acoustic Doppler current profiler (ADCP) and total suspended solid concentrations (TSS) were determined from water samples. Results show that background TSS ranged from 7 to 9 mg l‒1 whilst dredging plumes exhibited a vertical gradient of TSS ranging from 9 to 15 mg l‒1 near the surface (0–2 m), and 24 to 70 mg l‒1 near the bottom (10–12 m). ADCP transects conducted during and after dredging showed that the plume dissipated from the dredged area within 1 hour. Final transects (~1 hour after the dredging ended), revealed backscatter signals ranging from background levels to ~1.2 times greater than the background. Based on TSS concentrations and time for plume dispersion, previous studies indicated that a plume with duration of 1 to 2 hours and TSS concentration around 70 mg l‒1 is below the threshold for causing serious impacts to the biota; therefore, only minor effects can be expected for the two dredging plumes monitored.

year: 2015-09-16

title: Invading the Waikato: A postcolonial re-view

authors: Dench, Simon

subjects: New Zealand

abstract: The article discusses images of the Waikato Region of New Zealand from the 1860s, examining them within the context of British colonization and invasion. It comments on photographs by surveyor Daniel Manders Beere and British Army Royal Artillery Regiment Assistant Surgeon William Temple. The author also comments on a map of New Zealand's North Island made by surveyor Charles Heaphy and a map of Newcastle, New Zealand, depicting its earlier names of Ngāruawāhia and Queenstown. Other topics include spatial history, postcolonialism, and the 1863 to 1864 British invasion of Waikato.

text: Invading the Waikato: A postcolonial re-view The article discusses images of the Waikato Region of New Zealand from the 1860s, examining them within the context of British colonization and invasion. It comments on photographs by surveyor Daniel Manders Beere and British Army Royal Artillery Regiment Assistant Surgeon William Temple. The author also comments on a map of New Zealand's North Island made by surveyor Charles Heaphy and a map of Newcastle, New Zealand, depicting its earlier names of Ngāruawāhia and Queenstown. Other topics include spatial history, postcolonialism, and the 1863 to 1864 British invasion of Waikato.

year: 2011