Swimmers were submitted to the maximum effort in the 50-m freestyle, filmed by three camcorders to determine biomechanical parameters (Figure 1B ). The first camera was positioned for the analysis of the swim start (CASIO® Exilim FH-25), the second for all course and clean swimming (GoPro® HERO3 +), and the third was exclusive for the turns (GoPro® HERO3 +). All of them were configured with a sampling frequency of 30 Hz. In addition, a light signal was used as a reference to the starting signal in the video.
Hero3
Manufactured by GoPro
Sourced in United States
The GoPro Hero3 is a compact, lightweight video camera designed for capturing high-quality footage. It features a 12-megapixel sensor and the ability to record video at resolutions up to 4K at 15 frames per second, or 1080p at 60 frames per second. The camera is waterproof up to 40 meters without the need for a separate housing.
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Lab products found in correlation
27 protocols using hero3
1
Biomechanical Analysis of 50-m Freestyle Swimmers
2
Parental Nest Attendance Monitoring
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During the first breeding round, when the pairs had hatchlings and the median age of a brood reached 5, 8, 11 or 14 days, a camera (Panasonic HC-v500, Osaka, Japan/ JVC, Everio HDD, Kanagawa, Japan/ JVC quad, Kanagawa, Japan) was placed in the middle of the room to simultaneously film all focal cages from the front. These videos were later used to score nest attendance of the parents. To validate whether nest attendance predicted feeding events, in-nest cameras (GoPro HERO 3+, GoPro, CA, USA) that could be fixed under the roof of the nest box were used to record inside the nest. To prevent a neophobia response to the in-nest cameras during filming, dummy cameras (a black cardboard dummy in size and shape resembling the GoPro HERO 3+) had been attached to all nest boxes from day 1 onwards. These were replaced with real cameras only on the day of filming and returned afterwards. Filming always took place between 9:00 to 12:00 am for the duration of 55 min and the schedule was balanced by nest, brood age and treatment. For the second breeding round, when nest attendance had been validated to predict feeding events (see below), only nest attendance was assessed (filming the breeding pairs with chicks with the room camera).
3
Observing Parental Nest Attendance
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During the first breeding round, when the pairs had hatchlings and the median age of a brood reached 5, 8, 11 or 14 days, a camera (Panasonic HC-v500, Osaka, Japan/ JVC, Everio HDD, Kanagawa, Japan/ JVC quad, Kanagawa, Japan) was placed in the middle of the room to simultaneously film all focal cages from the front. These videos were later used to score nest attendance of the parents. To validate whether nest attendance predicted feeding events, in-nest cameras (GoPro HERO 3+, GoPro, CA, USA) that could be fixed under the roof of the nest box were used to record inside the nest. To prevent a neophobia response to the in-nest cameras during filming, dummy cameras (a black cardboard dummy in size and shape resembling the GoPro HERO 3+) had been attached to all nest boxes from day 1 onwards. These were replaced with real cameras only on the day of filming and returned afterwards. Filming always took place between 9:00 to 12:00 am for the duration of 55 min and the schedule was balanced by nest, brood age and treatment. For the second breeding round, when nest attendance had been validated to predict feeding events (see below), only nest attendance was assessed (filming the breeding pairs with chicks with the room camera).
4
Behavioral Arena Experiments on Snakes
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During experiments on A. duboisii, A. laevis, A. tenuis and H. major at the University of Adelaide, a snake was transferred from the seawater holding tank (24˗28°C, 450L volume, 35 ppm, 12 h:12 h day: night) to a round, black plastic behavioural arena (60 cm diameter × 60 cm height, 50 L volume) filled with seawater (24˗28°C, 35 L volume, 13 cm depth) and covered by a mesh net. The arena was housed in a dark room lit by a single florescent red globe positioned 1 m above the arena (Figure S7). A lid was placed over the arena for 1˗2 h to allow the snakes to adapt to the arena before initiating trials.
Trials were recorded with a camera (GoPro Hero3+, Go Pro Inc., USA; 29.97 fps; 1920 × 1080) positioned above the behavioural arena. During experiments on A. laevis, A. mosaicus, A. tenuis, H. darwiniensis, H. major, H. stokesii and H. platurus at field sites, snakes were transferred to a rectangular, black plastic behavioural arena (66 cm length × 44 cm width × 23 cm height, 60 L volume) filled with freshwater (29 L, 10 cm depth) and covered by a mesh net. A lid was placed over the arena as described in experiments at the University of Adelaide, and trials were recorded directly by the observer and (where possible) with a camera (GoPro Hero3+, Go Pro Inc., USA; 29.97 fps; 1920 × 1080) positioned above the behavioural arena.
Trials were recorded with a camera (GoPro Hero3+, Go Pro Inc., USA; 29.97 fps; 1920 × 1080) positioned above the behavioural arena. During experiments on A. laevis, A. mosaicus, A. tenuis, H. darwiniensis, H. major, H. stokesii and H. platurus at field sites, snakes were transferred to a rectangular, black plastic behavioural arena (66 cm length × 44 cm width × 23 cm height, 60 L volume) filled with freshwater (29 L, 10 cm depth) and covered by a mesh net. A lid was placed over the arena as described in experiments at the University of Adelaide, and trials were recorded directly by the observer and (where possible) with a camera (GoPro Hero3+, Go Pro Inc., USA; 29.97 fps; 1920 × 1080) positioned above the behavioural arena.
5
Drone-Assisted Cryoconite Hole Characterization
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Images of the glacier surface were recorded with a drone (DJI phantom 2 with 3-axis stabilized gimbal and GoPro Hero 3+) during two flights between 17:00 and 18:00 UTC. In total, 19 images with a resolution of 12 megapixel were analyzed from the medial moraine (n = 10), north of the glacier/lake ice ridge (n = 6) and white ice patch within the lake ice (n = 3). Batch modifications of all histograms with the software Fiji (Schindelin et al., 2012 (link)) improved the contrast between cryoconite holes and glacier ice. Also, dark-colored moraine ice was successfully discriminated from cryoconite holes. Next, the images were thresholded which resulted in region of interests (ROIs) with a variety of shapes. Only ROIs with a roundness > 0.6 were considered in the final calculation where roundness was defined as 4 × Area / (π + Major Axis2).
6
Deep Brain Stimulation Effects on Rat Mobility
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Rats were pair-housed for 8 days, during which they had received DBS on days 3–7. Stimulation was activated in the STIM rats (n = 7; 130 Hz, 90 μS/phase pulse-width, 50 μS inter-pulse spacing, 200 μA biphasic) for 1 h, at 12 p.m. each day. Rats underwent recordings of EEG and mobility before and after this period, using a wireless recording system (W32; Multichannel Systems) and a video-tracking system (Cinelab; Plexon). During stimulation sessions, the status of the animals was monitored in another room using a camera mounted above the cages (Hero 3; GoPro).
7
Novel Object Test for Neophobia in Chickens
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To assess neophobia and inspective curiosity, birds were subjected to a novel object test (NOT) in the same area as the OFT but the following day and in pairs. As such, the arena was not novel and the impact of social isolation was removed during the NOT. Birds were placed in the center of the bottom third of the arena, 1 m away from a novel object and left for five minutes. The novel object (NO) was a small florescent orange traffic cone (130 mm H × 70 mm W × 70 mm L). Behavior was recorded via a GoPro camera (Hero3, GoPro Inc., San Mateo, CA, USA) mounted above the arena and later assessed by one trained assessor blind to treatment. Time to reach the NO and binary score of ‘interacted with NO or not’ was recorded. The first bird out of the pair to approach and/or interact with the NO was recorded. The average distance of both chickens to the NO was measured via screenshots every 30 s and calculated using ImageJ software (Bethesda, MD, USA).
After the NOT, each chicken was weighed and leg health was assessed using a 5-point gait scoring method developed by Kestin et al. [23 (link)]. Leg health was expected to improve in the P group if perch use was frequent relative to C and HC birds that did not receive access to perches.
After the NOT, each chicken was weighed and leg health was assessed using a 5-point gait scoring method developed by Kestin et al. [23 (link)]. Leg health was expected to improve in the P group if perch use was frequent relative to C and HC birds that did not receive access to perches.
8
Motion Capture in Dance Studio
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Video recordings were made with three GoPro cameras (type; HERO 3 and 4). Two cameras (labeled overview cameras) were placed at opposite corners of the dance studio at a minimum height of two meters to create an overview of the whole studio. A third GoPro camera (referred to as feedback camera) was attached to a chest harness worn by the teachers. This camera was primarily used to examine the vantage point of the teacher and record verbal communication offered by the teacher.
9
Open-Field Test Behavior in Chickens
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Chickens were transported by hand to the test arena (1900 L × 920 W × 570 H) in a testing room < 5 m from their home pen but visually and audibly isolated. The testing room was identical to the rooms that contained the home pens and wood shaving litter flooring was provided in the test area, similar to the home pen environment. Chickens were placed in the center of the front third of the arena and left for five minutes. Behavior was recorded via GoPro digital camera (Hero3, GoPro Inc., San Mateo, CA, USA) mounted directly above the arena. At a later time, videos were analyzed by one trained observer. Open field test (OFT) measures included latency to vocalize, number of vocalizations and defecations and time spent immobile in addition to binary assessment of whether a bird attempted to escape. An escape attempt was defined as two legs leaving the ground and jumping into, onto or over the test arena wall.
10
Assessing Tonic Immobility in Chickens
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We utilized the tonic immobility method reported by Jones [21 (link)]. Each chicken was tested in a quiet isolated room, transported by one handler using two hands. The chicken was inverted and restrained gently on its back in a U-shaped cradle, the head was lightly covered and light pressure was applied to the sternum for 15 s. After 15 s of pressure, the handler removed the tactile interaction and moved away out of sight of the chicken until the chicken righted itself. A maximum of five attempts were made to induce the TI state. A successful induction was considered when the chicken remained in TI for more than 15 s after the handler released pressure. Chickens were permitted to remain in a TI state for a maximum of 600 s after which they were gently righted. If TI was not induced after five attempts, that chicken was given a score of zero. The bird’s response was captured by video recorders (Hero3, GoPro Inc., San Mateo, CA, USA) and the length of time that the chickens remained in TI was assessed from the recordings at a later time by one assessor who was blind to treatment.
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