cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.3886/e233591v1
title: Efficacy of universal masking for source control and personal protection from simulated respiratory aerosols in a room

description: Masks block aerosols produced during coughs and exhalations (“source control”). Masks also slow and deflect cough and exhalation airflows, which changes the dispersion of aerosols. Factors such as the directions in which people are facing (orientation) and separation distance also affect aerosol dispersion. However, it is not clear how masking, orientation, and distance interact. We placed a respiratory aerosol simulator (“source”) and a breathing simulator (“recipient”) in a chamber and measured aerosol concentrations for different combinations of masking, orientation, and separation distance. When the simulators were front-to-front during coughing, masks reduced the 15-minute mean aerosol concentration at the recipient by 92% (p \u003c 0.0001) at 0.9 and 1.8 m separation. When the simulators were side-by-side, masks reduced the concentration by 81% at 0.9 m and 78% at 1.8 m (p \u003c 0.0001 for both). During breathing, masks reduced the aerosol concentration by 66% when front-to-front (p = 0.0056) and 76% when side-by-side (p \u003c 0.0001) at 0.9 m. Similar results were seen at 1.8 m. When the simulators were unmasked, changing the orientations from front-to-front to side-by-side reduced the cough aerosol concentration by 59% at 0.9 m and 60% at 1.8 m (p \u003c 0.0001 for both). When both simulators were masked, changing the orientations did not significantly change the concentration at either distance during coughing or breathing. Increasing the distance between the simulators from 0.9 m to 1.8 m during coughing reduced the aerosol concentration by 25% when no masks were worn (p \u003c 0.0001) but had little effect when both simulators were masked (4% decrease, p = 0.7090). During breathing, when neither simulator was masked, increasing the separation reduced the concentration by 13%, which approached significance (p = 0.0737), while the change was not significant when both source and recipient were masked (8% decrease, p = 0.3235). Our results suggest that universal masking reduces exposure to respiratory aerosol particles regardless of the orientation and separation distance between the source and recipient.
DOI: 10.15468/dl.cyqg7a
title: Occurrence Download

description: A dataset containing 42 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Arceuthobium yecorense Hawksw. & Wiens"
 ]
}

 The dataset includes 42 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058276-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17617/3.zlhnkb
title: Invariant HVC size in female canaries singing under testosterone: Unlocking function through neural differentiation, not growth.

description: Raw images for Fig. 2: Song development and HVC size stability during testosterone-induced singing in adult female canaries.
DOI: 10.15468/dl.reakrt
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((1.1382 20.0599,-7.8618 20.0599,-7.8618 11.0599,1.1382 11.0599,1.1382 20.0599))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058277-250525065834625/datasets/export for details.
DOI: 10.3886/e233578
title: Trends in Worker Hearing Loss by Industry Sector, 1981-2010

description: Background: The purpose of this study was to estimate the incidence and prevalence of hearing loss for noise-exposed U.S. workers by industry sector and 5-year time period, covering 30 years.<br><br>Methods: Audiograms for 1.8 million workers from 1981-2010 were examined. Incidence and prevalence were estimated by industry sector and time period. The adjusted risk of incident hearing loss within each time period and industry sector as compared with a reference time period was also estimated.<br><br>Results: The adjusted risk for incident hearing loss decreased over time when all industry sectors were combined. However, the risk remained high for workers in Healthcare and Social Assistance, and the prevalence was consistently high for Mining and Construction workers.<br><br>Conclusions: While progress has been made in reducing the risk of incident hearing loss within most industry sectors, additional efforts are needed within Mining, Construction and Healthcare and Social Assistance.
DOI: 10.3886/e233578v1
title: Trends in Worker Hearing Loss by Industry Sector, 1981-2010

description: Background: The purpose of this study was to estimate the incidence and prevalence of hearing loss for noise-exposed U.S. workers by industry sector and 5-year time period, covering 30 years.<br><br>Methods: Audiograms for 1.8 million workers from 1981-2010 were examined. Incidence and prevalence were estimated by industry sector and time period. The adjusted risk of incident hearing loss within each time period and industry sector as compared with a reference time period was also estimated.<br><br>Results: The adjusted risk for incident hearing loss decreased over time when all industry sectors were combined. However, the risk remained high for workers in Healthcare and Social Assistance, and the prevalence was consistently high for Mining and Construction workers.<br><br>Conclusions: While progress has been made in reducing the risk of incident hearing loss within most industry sectors, additional efforts are needed within Mining, Construction and Healthcare and Social Assistance.
DOI: 10.15468/dl.2kqgrm
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((25.0214 -34.0501,25.5395 -34.1098,25.5395 -32.9007,20.509 -32.9007,20.509 -34.5676,20.524 -34.555,20.8859 -34.5419,20.9606 -34.4398,21.2995 -34.5131,21.5296 -34.4338,21.8696 -34.4439,22.0323 -34.2835,22.221 -34.2428,22.2566 -34.1304,22.5993 -34.0741,22.9652 -34.1674,23.4069 -34.1858,23.4955 -34.0792,23.6056 -34.0563,24.8471 -34.2877,24.9447 -34.2397,25.0214 -34.0501))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058278-250525065834625/datasets/export for details.
DOI: 10.5281/zenodo.15701774
title: IMPACT OF MOODLE TRAINING ON DIGITAL COMPETENCIES OF TEACHERS IN TECHNICAL-PRODUCTIVE EDUCATION

description: La integración de tecnología en la educación técnico-productiva requiere que los docentes fortalezcan sus competencias digitales para gestionar eficazmente entornos virtuales de aprendizaje. En la investigación realizada, se analizó el impacto de un programa de capacitación en Moodle para el desarrollo de competencias digitales docentes en un Centro Técnico-Productivo (CETPRO) de Lima, Perú. Se empleó un diseño cuasiexperimental con un enfoque cuantitativo, transversal y descriptivo, evaluando a 50 docentes divididos en un grupo experimental (capacitación en Moodle) v un grupo control (sin intervención). Los resultados evidenciaron mejoras significativas en la competencia digital docente global en el grupo experimental (+43%), con incrementos notables en comunicación y colaboración digital (+41%), aplicación didáctica de la tecnología (+43/o) y confianza frente a la tecnología (+42%). El análisis estadístico confirmó diferencias significativas entre los grupos (p<0.001, r>0.80), indicando un impacto positivo de la capacitación en Moodle. Se concluye que la formación docente en entornos digitales no solo fortalece la integración de tecnología en la enseñanza, sino que también promueve metodologías activas e innovadoras. Se recomienda ampliar la investigación a nivel longitudinal y explorar su influencia en el rendimiento estudiantil.
DOI: 10.5281/zenodo.15701775
title: IMPACT OF MOODLE TRAINING ON DIGITAL COMPETENCIES OF TEACHERS IN TECHNICAL-PRODUCTIVE EDUCATION

description: La integración de tecnología en la educación técnico-productiva requiere que los docentes fortalezcan sus competencias digitales para gestionar eficazmente entornos virtuales de aprendizaje. En la investigación realizada, se analizó el impacto de un programa de capacitación en Moodle para el desarrollo de competencias digitales docentes en un Centro Técnico-Productivo (CETPRO) de Lima, Perú. Se empleó un diseño cuasiexperimental con un enfoque cuantitativo, transversal y descriptivo, evaluando a 50 docentes divididos en un grupo experimental (capacitación en Moodle) v un grupo control (sin intervención). Los resultados evidenciaron mejoras significativas en la competencia digital docente global en el grupo experimental (+43%), con incrementos notables en comunicación y colaboración digital (+41%), aplicación didáctica de la tecnología (+43/o) y confianza frente a la tecnología (+42%). El análisis estadístico confirmó diferencias significativas entre los grupos (p<0.001, r>0.80), indicando un impacto positivo de la capacitación en Moodle. Se concluye que la formación docente en entornos digitales no solo fortalece la integración de tecnología en la enseñanza, sino que también promueve metodologías activas e innovadoras. Se recomienda ampliar la investigación a nivel longitudinal y explorar su influencia en el rendimiento estudiantil.
DOI: 10.15468/dl.zkvunb
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((1.1382 29.0599,-7.8618 29.0599,-7.8618 20.0599,1.1382 20.0599,1.1382 29.0599))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058280-250525065834625/datasets/export for details.
DOI: 10.15468/dl.g7meyq
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((32.064 -28.9416,32.4847 -28.5786,30.5701 -28.5786,30.5701 -30.7329,30.6252 -30.6659,31.4179 -29.4257,31.8178 -29.0299,32.064 -28.9416))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058281-250525065834625/datasets/export for details.
DOI: 10.5281/zenodo.15620108
title: Dataset for Alcacer et al., Cell Reports 2025

description: Data set from manuscript Abnormal hyperactivity of striatal ensembles encodes distinct dyskinetic behaviors revealed by high-resolution clustering, Alcacer et al., Cell Reports 2025. Specific description of figures panels in 'README_Tabular_data' document.
DOI: 10.6084/m9.figshare.29367533
title: SLR: NLP in SE (Data Extraction Form)

description: A systematic literature review about the usage and trendings of Natural Language Processing (and LLMs) techniques in Software Engineering.
DOI: 10.6084/m9.figshare.29367533.v1
title: SLR: NLP in SE (Data Extraction Form)

description: A systematic literature review about the usage and trendings of Natural Language Processing (and LLMs) techniques in Software Engineering.
DOI: 10.15468/dl.52kfn5
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((-10.6025 29.6545,-11.3716 29.0599,-7.8618 29.0599,-7.8618 34.0821,-8.7804 33.6886,-9.6416 32.8946,-9.7854 32.3021,-10.3184 31.5413,-10.3907 30.6396,-10.1682 30.2237,-10.6025 29.6545))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058282-250525065834625/datasets/export for details.
DOI: 10.15468/dl.hb9qpp
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((35.5808 -24.13,35.5909 -24.0715,30.5701 -24.0715,30.5701 -28.5786,32.4847 -28.5786,32.55 -28.5222,33.0346 -26.8668,32.9741 -26.7838,33.0415 -26.059,32.9304 -26.0011,32.7994 -26.1281,32.6834 -26.0015,32.813 -25.8728,32.8513 -25.7166,33.3048 -25.3731,35.1489 -24.6699,35.5808 -24.13))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058283-250525065834625/datasets/export for details.
DOI: 10.5281/zenodo.15700906
title: Au-delà de la mesure: repenser à l'évaluation des dispositifs pédagogiques à l'aune des enjeux contemporains

description: Comment aborder sa pratique évaluative en enseignement ?

Ce travail avait pour but de définir et d'interroger la notion d'efficacité des pratiques evaluatives dans le domaine de l'éducation.
DOI: 10.5281/zenodo.15700907
title: Au-delà de la mesure: repenser à l'évaluation des dispositifs pédagogiques à l'aune des enjeux contemporains

description: Comment aborder sa pratique évaluative en enseignement ?

Ce travail avait pour but de définir et d'interroger la notion d'efficacité des pratiques evaluatives dans le domaine de l'éducation.
DOI: 10.15468/dl.5qsu6r
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((-16.8295 11.8376,-16.8618 11.7189,-16.8618 11.0599,-7.8618 11.0599,-7.8618 20.0599,-16.8618 20.0599,-16.8618 19.0648,-16.6653 18.7702,-16.5447 17.7591,-16.8618 16.9131,-16.8618 11.8636,-16.8295 11.8376))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058284-250525065834625/datasets/export for details.
DOI: 10.15468/dl.ftb9nk
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((31.8862 -21.3285,30.5701 -20.3186,30.5701 -24.0715,35.5909 -24.0715,35.6007 -24.0157,35.6007 -23.8125,35.4969 -23.7035,35.6007 -23.165,35.6007 -22.9702,35.227 -22.2482,34.6862 -21.6944,34.013 -21.3095,33.5 -21.1593,32.9675 -21.1092,32.4352 -21.1612,31.8862 -21.3285))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058285-250525065834625/datasets/export for details.
DOI: 10.5281/zenodo.15701615
title: prueba1
DOI: 10.5281/zenodo.15701616
title: prueba1
DOI: 10.15468/dl.q53phq
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((27.1586 -33.5889,28.2048 -32.9007,25.5395 -32.9007,25.5395 -34.1098,25.6468 -34.1222,25.7787 -34.0734,25.7098 -33.9109,25.8639 -33.797,26.4806 -33.8473,27.1586 -33.5889))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058288-250525065834625/datasets/export for details.
DOI: 10.15468/dl.rgkrku
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((-16.8319 22.8052,-16.8618 22.7792,-16.8618 20.0599,-7.8618 20.0599,-7.8618 29.0599,-11.3716 29.0599,-11.7891 28.737,-13.2712 28.3165,-13.6289 27.8814,-13.9674 27.0555,-14.8908 26.4573,-15.3388 24.986,-16.3247 24.0887,-16.8319 22.8052))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058287-250525065834625/datasets/export for details.
DOI: 10.15468/dl.cxaf7r
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cylindrocystis Meneghini ex De Bary, 1858",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((18.2339 -32.5266,18.1411 -32.657,18.1007 -32.7021,18.0224 -32.6366,17.8923 -32.6419,17.754 -32.8255,17.7723 -32.9007,20.509 -32.9007,20.509 -28.5786,16.2782 -28.5786,16.4358 -28.7202,16.726 -29.1235,17.1957 -30.3752,17.6655 -31.1743,18.1322 -31.7679,18.2495 -32.2638,18.2339 -32.5266))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058290-250525065834625/datasets/export for details.
DOI: 10.15468/dl.9698g5
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Neolamprologus furcifer (Boulenger, 1898)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "BasisOfRecord is one of (Specimen, Living Specimen, Observation, Human Observation, Machine Observation, Material sample, Literature Occurrence, Material citation, Occurrence evidence)",
 "Geometry POLYGON ((-16.8996 20.2064,-16.9237 20.0599,-16.8618 20.0599,-16.8618 22.7792,-17.2424 22.4474,-17.4477 21.9344,-17.5933 20.7331,-17.3825 20.3945,-16.8996 20.2064))"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058291-250525065834625/datasets/export for details.
DOI: 10.15468/dl.bs7rrh
title: Occurrence Download

description: A dataset containing 1172350 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Calamagrostis canadensis (Michx.) P.Beauv., Chamaenerion Seguier, Equisetum arvense L., Equisetum variegatum Schleich. ex F.Weber & D.Mohr, Hedysarum hedysaroides subsp. arcticum (B.Fedtsch.) P.W.Ball)",
 "Geometry POLYGON ((-180 45.53015, 180 45.53015, 180 83.62313, -180 83.62313, -180 45.53015))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "CoordinateUncertaintyInMeters is less than or equal to 50000"
 ]
}

 The dataset includes 1172350 records from 1443 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0058279-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.18015214
title: Mice ephys datasets for "Synaptic plasticity in the perforant pathway drives inhibitory reorganization enhancing Dentate Gyrus functionality" Estarellas et al. 2026

description: The repository constains the datasets (PV) used in the publication:Synaptic plasticity in the perforant pathway drives inhibitory reorganization enhancing Dentate Gyrus functionality.

Authors:

Cristian Estarellas, Efrén Álvarez-Salvado, Laura Pérez-Cervera, José María Caramés, Elena Pérez-5 Montoyo, Víctor J. López-Madrona, Raquel Garcia-Hernandez, Claudio R. Mirasso, Santiago Canals
DOI: 10.5281/zenodo.18015213
title: Mice ephys datasets for "Synaptic plasticity in the perforant pathway drives inhibitory reorganization enhancing Dentate Gyrus functionality" Estarellas et al. 2026

description: The repository constains the datasets (PV) used in the publication:Synaptic plasticity in the perforant pathway drives inhibitory reorganization enhancing Dentate Gyrus functionality.

Authors:

Cristian Estarellas, Efrén Álvarez-Salvado, Laura Pérez-Cervera, José María Caramés, Elena Pérez-5 Montoyo, Víctor J. López-Madrona, Raquel Garcia-Hernandez, Claudio R. Mirasso, Santiago Canals
DOI: 10.15468/dl.mr7u8w
title: Occurrence Download

description: A dataset containing 2175 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Scomberomorus guttatus"
 ]
}

 The dataset includes 2175 records from 46 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0063747-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3nqvhx
title: Occurrence Download

description: A dataset containing 293 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Astrophytum asterias (Zucc.) Lem."
 ]
}

 The dataset includes 293 records from 31 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001392-250123221155621/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.b98wjj
title: Occurrence Download

description: A dataset containing 758 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Country is Colombia",
 "OccurrenceStatus is Present",
 "TaxonKey is Winteraceae"
 ]
}

 The dataset includes 758 records from 74 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001393-250123221155621/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.