Find research datasets worth reusing

Measurement of interstellar extinction for classical TTauri stars using FUV H2 line fluxes

Understanding the interstellar and potentially circumstellar extinction in sight lines of classical TTauri stars is an important ingredient for constructing reliable spectral energy distributions, which catalyze for example protoplanetary disk chemistry. Therefore, some attempts of measuring AV towards individual stars have been made using partly different wavelength regimes and different under- lying assumptions. Here, we use strong lines of Lyα fluorescent H2 and derive extinction based on the assumption of optically thin transitions. We investigate a sample of 72 classical TTauri stars observed with the Hubble Space Telescope in the framework of the ULLYSES programme. We compute AV and RV values for the 34 with sufficient data quality as well as an additionally AV value for the canonical RV = 3.1-value. Our results agree largely with values obtained from optical data. Moreover, we confirm the degeneracy between AV and RV and present possibilities to break this. Finally, we discuss the validity of the assumption of optical thin lines. Here we show the used line fits and A_V modelling. Appendix of the publication in Astronomy and Astrophysics:  Measurement of interstellar extinction for classical TTauri stars using FUV H2 line fluxes

Machine-learning-based validation of Microsoft Azure Kinect in measuring gait profiles

The dataset was used to validate Microsoft Azure Kinect in measuring gait profiles, employing machine learning techniques to investigate the impact of residual errors due to environmental, methodological, and processing factors on the accuracy of gait profile assessments. Data were collected from healthy and post-stroke subjects using a motion capture system and a 3D camera-based system with MAK, and corresponding gait profiles were estimated and compiled into a dataset. The estimated gait profiles include spatiotemporal, asymmetry, and body center of mass parameters to capture various normal and pathological gait characteristics. Contact e-mail: claudia.ferraris@cnr.it (Claudia Ferraris) lucavisma@hotmail.com (Luca Vismara) veronica.cimolin@polimi.it (Veronica Cimolin)

opencc-by-sa-4.0Nov 2024View details →

Emission library populated with emission rates and effectiveness rates from risk mitigation measures.

This document contains  an emission library populated with emission rates from at least 10-15 industrial activities and effectiveness rates from at least 30 risk mitigation measures (RMMs)”, which includes a literature review of emission factors from diverse sources and a review of effectiveness rates for different risk mitigation measures (RMMs), as well as a description of the methodology applied during the reviews. This document is part of the report of Action B5  of  NANOHEALTH project (LIFE20 ENV/ES/000187).

Improving the Scalability of DBRepo - Runtime Measurement Data

Contains the results for the runtime evaluation of the changes to DBRepo's architecture proposed in the bachelor's thesis "Enabling the Scalability of DBRepo" by Tobias Grantner reported in the unit of nanoseconds. The files are named according to the scheme <code><operation>_<change>_<state>.csv</code>, where <code><operation></code> specifies the operation that is evaluated, <code><change></code> corresponds to the name of the proposed change to the architecture and <code><state></code> describes whether the system was evaluated before or after the change was implemented.

Strain Measurements made in the blade with FBG and DFO sensors.

Record of Strain measurements made in the blade with FBG and DFO sensors. The blade strain measurements are collected in order to carry out monitoring activities of the structural health of the blade developed as part of the MAREWIND project.

opencc-by-nc-1.0Nov 2024View details →

Measurement, self-similarity, and TNT equivalence of blasts from exploding wires

This dataset contains raw overpressure time histories from blasts generated from exploding aluminum wires, recorded under controlled conditions at five energy levels and six standoff distances. The time histories, referenced in the accompanying study, provide detailed information about the shock wave profiles specific to aluminum-wire explosions.

opencc-zeroFeb 2020View details →

Coping with branch excision when measuring leaf net photosynthetic rates in a lowland tropical forest

Measuring leaf gas exchange from canopy leaves is fundamental for our understanding of photosynthesis and for a realistic representation of carbon uptake in vegetation models. Since canopy leaves are often difficult to reach, especially in tropical forests with emergent trees up to 60 meters at remote places, canopy access techniques such as canopy cranes or towers have facilitated photosynthetic measurements. These structures are expensive and therefore not very common. As an alternative, branches are often cut to enable leaf gas exchange measurements. The effect of branch excision on leaf gas exchange rates should be minimised and quantified to evaluate possible bias. We compared light-saturated leaf net photosynthetic rates measured on excised and intact branches. We selected branches positioned at three canopy positions, estimated relative to the top of the canopy: upper sunlit foliage, middle canopy foliage, and lower canopy foliage. We studied the variation of the effects of branch excision and transport amongst branches at these different heights in the canopy. After excision and transport, light-saturated leaf net photosynthetic rates were close to zero for most leaves due to stomatal closure. However, when the branch had acclimated to its new environmental conditions – which took on average 20 minutes –light-saturated leaf net photosynthetic rates did not significantly differ between the excised and intact branches. We therefore conclude that branch excision does not affect the measurement of light-saturated leaf net photosynthesis, provided that the branch is recut under water and is allowed sufficient time to acclimate to its new environmental conditions.

opencc-zeroDec 2018View details →

Data from: Dynamic measurements of black oystercatcher (Haematopus bachmani) predation on mussels (Mytilus californianus)

Intertidal zone mussels can face threats from a variety of predatory species during high and low tides, and they must balance the threat of predation against other needs such as feeding and aerobic respiration. Black oystercatchers (Haematopus bachmani) on the Pacific coast of North America can depend on the mussel Mytilus californianus for a substantial portion of their diet. Observations suggest that oystercatchers tend to focus on mussels beginning to gape their valves during rising tides, following periods of aerial emersion. We present detailed, autonomous field measurements of the dynamics of three such predation events in the rocky intertidal zone. We measured accelerations of up to 4 g imposed on mussels, with handling times of 115 to 290 s required to open the shell and remove the majority of tissue. In each case a single oystercatcher attacked a mussel that had gaped the shell valves slightly wider than its neighbors as the rising tide began to splash the mussel bed, but no other obvious characteristic of the mussels, such as body temperature or orientation, could be linked to the oystercatcher's individual prey choice.

opencc-zeroMar 2020View details →

Optical traits perform equally well as directly-measured functional traits in explaining the impact of an invasive plant on litter decomposition

1. Functional traits can help elucidate and predict the impact of invasive plant species on ecosystem functioning. Yet, this approach requires comprehensive and labor-intensive trait collection campaigns, covering intraspecific trait variation of both the invader and native species in the invaded community. One potential way to overcome these logistic constraints is using hyperspectral remote sensing technology to efficiently quantify functional trait values. Although such spectrally derived or 'optical' traits are known to closely link to directly-measured functional traits, little research has explored how well these optical traits perform in assessing invader-induced ecosystem impact. 2. Here, we explored the trait-mediated impact of the invasive Rosa rugosa on litter decomposition and evaluated whether optical traits perform equally well as directly-measured traits in predicting litter decomposition variation. We collected data on species-specific functional traits, leaf hyperspectral reflectance and standardized 'tea bag index' litter decomposition across 25 invaded and 25 uninvaded coastal grassland plots. The selected traits were all potentially related to litter decomposition and covered the leaf economics spectrum, additional leaf structural components and competitive ability. Optical traits were quantified through a combination of a physical radiative transfer model inversion and vegetation indices calculations. 3. Invasion significantly increased the stabilization factor, i.e. the amount of resulting recalcitrant litter. Invader impact on litter decomposition could be entirely explained by changes it induced in the functional traits of the native community, rather than by the invader's traits itself. More specifically, the invader pushed the invaded community towards traits associated with high litter quality. Optical traits performed equally well as directly-measured traits in explaining the invasion impact on the stabilization factor (R2= 41.9% vs. 38.5%). Furthermore, the interpretation of the results based on optical traits resulted in a similar functional understanding of the invader impact. 4. Synthesis: Our results indicate the potential of hyperspectral data to explain changes in ecosystem functioning. The combination of radiative transfer models and vegetation indices allowed to extract all relevant trait information from the hyperspectral data. This framework thus presents a practical short-cut to assess relevant leaf traits, requiring only a limited amount of field trait measurements.

opencc-zeroMay 2020View details →

An automated sensitive approach for measuring whole gut transit time

Background Commonly used methods to measure whole gut transit time in rodents have yet to combine high sensitivity, objectivity and automation. We have developed a novel method using oral gavage of non-toxic fluorescent dye particles and their detection by fluorescence imaging to enable unbiased automated detection of gut transit time simultaneously in 8 cages. Methods Naïve mice (n=20) were gavaged with a 4.4% suspension of fluorescent dye in CMC in 3 groups on 2 occasions. Each group was imaged in 8 cages at 5-minute intervals using blue LEDs for illumination and a Sony full-frame mirrorless camera with a green band-pass emission filter. Custom Matlab code counted the number of fluorescent boli per cage post-hoc and provided graphical and spreadsheet output. Boli counts across a wide range of parameters were compared to blind assessments by an experimenter. Results Fluorescent boli were detected with high sensitivity, while unstained boli were readily rejected. All cages showed no fluorescent boli for the first ~20 frames (120 minutes), after which many cages gradually show a rise to 1-6 fluorescent boli. The mean time to first fluorescent bolus in each session was 264±141 and 223±81 minutes post-gavage, with no within subject consistency. There was high correlation between automated scores and that of experimenter (r=0.95±0.02), being robust to parameter changes. Conclusions & Inferences This novel approach provides a reliable, automatic and low-cost method of measuring gastrointestinal transit time in mice.

opencc-zeroJun 2021View details →

A common measure of prey immune function is not constrained by the cascading effects of predators

Simultaneously defending against predators, stymieing competitors, and generating immune responses can impose conflicting demands for host species caught in the entanglement of a food web. Host immunity is not only shaped by direct interactions among species, but also many indirect cascading effects. By reducing competition, predators in particular can affect resource acquisition necessary for hosts to mount energetically costly immune responses. However, identifying the links between predators and host immune responses determined by resource acquisition is a complex affair, because predators can (i) reduce host density and thus competition among hosts, (ii) exert non-consumptive trait-mediated effects on host resource acquisition behavior, and (iii) generate natural selection on host resource acquisition behavior. To examine the relative contributions of these potential predator driven density- and trait-mediated effects on a key aspect of immune function (total phenoloxidase activity, total PO), we conducted mesocosm and field experiments with larval damselflies ( Enallagma signatum ) and their dominant fish predator ( Lepomis macrochirus ). Although we expected to observe declines in total PO activity with increases in damselfly density, we found no relationship between density and total PO activity. We also found no support for the prediction that total PO activity would vary as a result of either non-consumptive trait-mediated effects or selection on damselfly foraging activity underlying resource acquisition. Despite the lack of trait- or densitymediated effects, we did find that total PO activity increased with damselfly prey density among lakes, implying resource limitation for this aspect of immune function. These unexpected results point to the need to better understand the ecological conditions whereby predators and competitors constrain immune functions necessary for species to defend themselves in complex food webs.

opencc-by-4.0Jun 2021View details →

Chloroform fluxes measured at the tundra on King George Island, Antarctica

In this study, the first in situ static-chamber measurements were conducted at coastal Antarctica tundra for CHCl3 fluxes, which showed that CHCl3 was naturally emitted from the Antarctic tundra. This dataset includes the chloroform fluxes measured from the tundra at the Fildes Peninsula and Ardley Island based upon static-chamber measurements and lab-based incubations under different manipulated conditions. Chloroform concentrations were analyzed by gas chromatography coupled with a mass spectrometry (GC/MS; Agilent 6890N/5973, Agilent Technologies, Santa Clara, CA).

opencc-by-4.0Jun 2021View details →

Co2 concentration, temperature and humidity in primary classrooms during the Covid-19 Safety Measures in Spain

Co2 concentration, temperature and humidity in primary classrooms during the Covid-19 Safety Measures in Spain. The data presented were collected between 1 May 2020 and 23 June 2021 using a low-cost CO2 sensor called SCD30 (https://bit.ly/3dDWXu1). This sensor can messure CO2, temperature and air humidity. Six nodes were built and deployed in six classrooms in two different schools in two different periods. In the first school, located in Vilafamés (Castellón, Spain), a total of 38,891 observations were carried out. Altogether 34,570 measurements were captured in the second school located in Vall d’Alba (Castellón, Spain).

opencc-by-4.0Jun 2016View details →

REFIT: Electrical Load Measurements (Cleaned)

The REFIT Electrical Load Measurements dataset includes cleaned electrical consumption data in Watts for 20 households at aggregate and appliance level, timestamped and sampled at 8 second intervals. This dataset is intended to be used for research into energy conservation and advanced energy services, ranging from non-intrusive appliance load monitoring, demand response measures, tailored energy and retrofit advice, appliance usage analysis, consumption and time-use statistics and smart home/building automation.

opencc-by-4.0Jun 2021View details →

December 2020 Eclipse Festival of Frequency Measurement: 10 MHz Data

These data are the results of a frequency estimation algorithm applied to WAV recordings of a 10 MHz carrier.  metadata.csv contains station records, notably decimal lat/lon coordinates for all stations. Ham radio callsigns are used as identifiers. Dec2020EclipseFestival-complete.csv contains the processed data. The following stations' data are included in this file: W8EDU, PY2ZX, AD0CY, DV1YKL, IU2EFA, JBRUH (*SWL), KI4MZA, SV2BBO, PA0SLT, VA3CBN, W2AAT, KB2YSI, VE3FYN, W2AGC, W3OA, N2UQS, K6FOD, W1ZOT, LU7WA, JJ1BDX, N2OA, K1FR-2, VK7KPC, VE4GLS, K9VB, ZS6YZ, VK5FPAW, W3MR, UA9LIF, VK2DLR, VE3YX, N6ITY-2, CE2MHW, N2KJD, W2MV, KI5JCN, G0LHZ, CA6NDC, I3JPA, CA6JAU, W7SUA, KN7BT, W8KTM, VA3EDB, W0EJO, KX4PR, PU3VRW, N6ITY-1, EA7QL, LU2JGP, KD7WPQ, W1CS, K1FR-1, G1KOT, HH2MK, DO1REH, N8VMX, VE6IXD, JI3XOK, VE6GRT, F4IEW, WV5L, K3JDB, KD2REU, KD8RV ___________________________________________________________________________________________________ *SWL: This indicates "shortwave listener." JBRUH is an abbreviation of a name, not a callsign. The station list was obtained using the following terminal command:  awk '{print $4}' Dec2020EclipseFestival-complete.csv | sed '/^$/d' | sed 's/Tone,//g' | sed 's/WWVH//g' | sed 's/WWV//g' | sed 's/,//g' | uniq ___________________________________________________________________________________________________ Errata: -F4IEW's UTC shift may be incorrect -VK7KPC's coordinates should be corrected to –41.56881 and 147.24237

Acoustic feature measurements of male and female NZ bellbird (Anthornis melanura) song syllables

Acoustic feature measurements of 20,700 syllables (acoustic units) of male and female birdsong, from NZ bellbirds (Anthornis melanura). The measurements were extracted in Koe bioacoustics software (koe.io.ac.nz), on recordings from six sites in the Hauraki Gulf, northeastern New Zealand. The sites are Tawhiti Rahi island (Poor Knights island group), Lady Alice Island (Hen and Chicks island group), Hauturu (Little Barrier Island), Tawharanui Peninsula, Repanga (Cuvier Island), and Tiritiri Matangi Island. Descriptions of extracted acoustic features can be found at https://github.com/fzyukio/koe/wiki#extract-unit-features

Replication package for: Measuring the Incentive to Collude: The Vitamin Cartels, 1990–1999 (version 3)

This replication package contains the data and the code to generate the results reported in "Measuring the Incentive to Collude: The Vitamin Cartels, 1990–1999" by Mitsuru Igami and Takuo Sugaya, to be published in The Review of Economic Studies.

Functional near-infrared spectroscopy visually evoked measurements and Autism Questionnaire score in adults and children

Functional near-infrared spectroscopy (fNIRS) visually-evoked data collected from healthy adults and children. We recruited a total of 40 adult participants (20 women, age: 31.05 ± 3.94 (SD) years) and 19 children (5 girls, age: 7.20 ± 3.01 (SD) years). Adult participants filled in the Autistic-traits Quotient (AQ) questionnaire, a 50-items self-administered report validated for the Italian version. The items consist of descriptive statements assessing personal preferences and typical behavior. Since child self-report might be affected by reading and comprehension difficulties, the children's version of Autism Spectrum Quotient (Italian version of AQ-child) was completed by parents. To measure changes in total Hb (THb) concentration and relative oxygenation levels (OHb and DHb) in the occipital cortex during the task, we used a continuous-wave NIRS system with 8 red light-sources operating at 760 nm and 850 nm, and 7 detectors, forming an array of 22 multi-distant channels.    The dataset includes 2 '.zip' files containing artifact-free visually-evoked transients HDF data, exported from Homer 3 (https://github.com/BUNPC/Homer3) in '.txt' format. Subfolders correspond to different stimulation conditions, for details refer to this paper [preprint coming soon]. Each txt file is named with the corresponding subject code and contains two events [tagged as 1 (baseline) and 2 (stimulus)].  The file 'annotations.csv' contains the following fields: Code [Subjects id name, that corresponds to the filename in the recording folders] Sex [M or F] Valid  [1 or 0, 0 means excluded subject] Age [int] CH_exclude [list of excluded channels] CH_Red [ list of channels that did not passed the calibration step] Category  [adult or child]    Cartoon_fixed  [cartoon name] Cartoon_chosen    [cartoon name] AQ  [global AQ score]   AQ_S  [ AQ subscale social ]    AQ_C  [ AQ subscale communication ]    AQ_A  [ AQ subscale attention]    AQ_D  [ AQ subscale detail]  AQ_I [ AQ subscale imagination]

ACORBA: Automated workflow to measure Arabidopsis thaliana root tip angle dynamic

Raw data linked to the research article "ACORBA: Automated workflow to measure Arabidopsis thaliana root tip angle dynamic"