We recruited participants aged 7–8 years old through the Health Insurance Plan of New York (HIP) between 2008 and 2009 [31 (link)]. Indoor environmental characteristics, including building type, were recorded by a field technician. Questionnaires also captured clinically relevant data. Hourly relative temperature and humidity data were collected using HOBO loggers (Onset Computer Corporation, Bourne, MA) which were placed in each site for approx imately 1 week beginning at the time dust samples were initially collected. Participants were asked about general air-conditioning use. However, participants were not asked about monthly or seasonal differences in air-conditioning use. We collected floor dust from each home at a single time point and allowed the fungal community in each sample to be representative of the season in which the home was sampled.
Loggers
Manufactured by Hobo
Sourced in United States
HOBO loggers are compact, portable data logging devices designed to record various environmental parameters, such as temperature, humidity, light intensity, and more. They are equipped with sensors to capture data and store it internally for later retrieval and analysis.
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Lab products found in correlation
5 protocols using loggers
1
Environmental Factors and Fungal Exposure in Children
2
Acceleration Data Loggers for Sheep Behavior
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HOBO® Pendant G acceleration data loggers were used (dimensions: 58 mm x 33 mm x 23 mm, weight: 18 g) (Onset Computer Corporation, Pocasset, MA, USA). The HOBO® Waterproof Shuttle and HOBOware® Pro software (version 3.7.8) were used for programming and reading the HOBO loggers (Onset Computer Corporation, Pocasset, MA, USA). Data loggers were programmed to record tilt and acceleration at a logging interval of 0.25 s (4 Hz, measurement range: ±3 gravitational force (g); accuracy: ±0.075 g at 25°C). Immediately prior to testing, loggers were activated using a magnet and then attached to the back of the neck of the sheep using a small strip of Velcro®. Velcro® provided a fast, easy method of attachment, requiring only a short period of restraint and a small point of contact with the sheep when compared to other methods such as a collar or halter. Wool on the back of the neck was parted and the logger was nestled as close to the skin as possible so that movement of wool had minimal impact on logger angle. Sheep in all groups had been shorn 5 months prior to testing. The current paper does not discuss the suitability of these data loggers for measuring vigilance, it reports on whether attachment of the loggers altered animal behaviour during testing.
3
Beet Leafhopper Oviposition on Non-Crop Hosts
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We measured oviposition of beet leafhoppers reared on non-agricultural host plant species under fluctuating temperature conditions. Individual pairs of newly emerged beet leafhoppers (< 24 h-old) were released into meshed cages (d = 6 cm, h = 10 cm) containing non-agricultural host plants (two replicates for each host plant species under different temperature conditions). For E. cicutarium, P. ovata, and S. tragus, meshed cages were maintained under experimental field settings at the University of California, Davis during winter months. Meshed cages for K. scoparia were maintained in a greenhouse to mimic summer temperature conditions (S1 Table ). Host plant leaves were collected weekly for a total of 10 to 15 weeks (depending on longevity of beet leafhopper females), and leaves were stained as described above to count numbers of eggs laid. Daily ambient temperatures were recorded using Hobo loggers (Onset Computer, Co., Bourne, MA, USA) and used to predict beet leafhopper oviposition.
4
Accelerometer-Based Cattle Behavior Monitoring
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Two accelerometers were attached to each cow. The first accelerometer was attached to the neck collar (right side) and the second was attached to the right hind leg as shown in Figure 1. The acceleration data were logged with a sampling rate of 1 Hz (1 sample each second) using HOBO loggers (Onset Computer Corporation, Pocasset, MA) . The HOBO logger is a waterproof 3-channel logger with 8-bit resolution, which can record up to approximately 21,800 combined acceleration readings or internal logger events. The logger uses an internal 3-axis accelerometer with a range of ± 3 g (accuracy ± 0.075 g at 25°C with a resolution of 0.025 g) based on micro-machined silicon sensors consisting of beams that deflect with acceleration.
The orientation of the accelerometers when the cow is standing and lying is shown in Figure 1. This orientation was respected for all cows. The clocks of the observer, the video recording system, and the sensors were synchronized at the start and at the end of the observation period so that observation data could be aligned accurately with the tri-axial accelerometer data retrieved from the sensors. In total, 96 hours of data (i.e., 6 h/cow, 16 cows total) were recorded for every accelerometer and used for classification of the behaviours.
The orientation of the accelerometers when the cow is standing and lying is shown in Figure 1. This orientation was respected for all cows. The clocks of the observer, the video recording system, and the sensors were synchronized at the start and at the end of the observation period so that observation data could be aligned accurately with the tri-axial accelerometer data retrieved from the sensors. In total, 96 hours of data (i.e., 6 h/cow, 16 cows total) were recorded for every accelerometer and used for classification of the behaviours.
5
Monitoring Thermal Stress in Dairy Cows
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Temperature and humidity data were collected using Hobo loggers (Onset Computer Corp., Pocasset, MA) installed in each of the barns in which prepartum and postpartum cows were housed. Temperature-humidity index (THI) was calculated for every 2-h interval within a 24-h period (12 intervals) and daily for each barn. The percentage of 2-h intervals with THI >68 was calculated for each day.
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