cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.zqcejh
title: Occurrence Download

description: A dataset containing 17135509 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Spiza americana (J.F.Gmelin, 1789), Cardinalis cardinalis (Linnaeus, 1758))",
 "BasisOfRecord is one of (Human Observation, Literature Occurrence, Living Specimen, Observation, Specimen, Occurrence evidence)",
 "Year is greater than or equal to 1901",
 "Year is less than or equal to 2021",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 17135509 records from 155 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0275666-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tgvegv
title: Occurrence Download

description: A dataset containing 23 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Cnidaria",
 "DatasetKey is Dr Mary Gillham Archive Project",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Geometry POLYGON ((-25.03991 31.75, 41.65954 31.75, 41.65954 71.53037, -25.03991 71.53037, -25.03991 31.75))"
 ]
}

 The dataset includes 23 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0208787-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.52kmhe
title: Occurrence Download

description: A dataset containing 288 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 {
 "or" : [
 "Geometry POLYGON((-114.8019 42.80823,-112.45845 42.80823,-112.45845 43.91929,-114.8019 43.91929,-114.8019 42.80823))",
 "Geometry POLYGON((-117.10326 42.58053,-114.22076 42.58053,-114.22076 43.9433,-117.10326 43.9433,-117.10326 42.58053))"
 ]
 },
 "HasGeospatialIssue is false",
 "TaxonKey is Artemisia tridentata (Nutt.) W.A.Weber"
 ]
}

 The dataset includes 288 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0275804-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25919/g58k-mj43
title: Parkes observations for project PX500 semester 2024APRS_04

description: This proposal relates to time purchased by the Chinese Academy of Sciences for Parkes follow-up confirmation and timing of FAST discoveries. As the observing time has been purchased this proposal (and the related PX501) does not require TAC grading. The primary reason for submitting a proposal is to ensure an outreach statement and that the proposal is entered into OPAL for the data archive to access. The Chinese team have two time requests. The time scheduled for the first, relating to this proposal, will be allocated in blocks of 24 hours and the data will become available in the data archive with an 18 month embargo period. The second type of time will be scheduled in shorter blocks and the data archived with a 10 year embargo.
DOI: 10.15468/dl.3pessw
title: Occurrence Download

description: A dataset containing 25 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Felicia microsperma DC."
 ]
}

 The dataset includes 25 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0209594-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7ndpf7
title: Occurrence Download

description: A dataset containing 7641 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Colibri serrirostris (Vieillot, 1816)"
 ]
}

 The dataset includes 7641 records from 28 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0275798-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.35vjxd
title: Occurrence Download

description: A dataset containing 11248339 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Cardinalis sinuatus Bonaparte, 1838, Pheucticus melanocephalus (Swainson, 1827), Pheucticus ludovicianus (Linnaeus, 1766), Mirafra javanica Horsfield, 1821, Lullula arborea (Linnaeus, 1758), Orthonyx temminckii Ranzani, 1822, Orthonyx spaldingii E.P.Ramsay, 1868, Entomodestes leucotis (Tschudi, 1844), Turdus grayi Bonaparte, 1838, Turdus merula Linnaeus, 1758)",
 "BasisOfRecord is one of (Human Observation, Literature Occurrence, Living Specimen, Observation, Specimen, Occurrence evidence)",
 "Year is greater than or equal to 1901",
 "Year is less than or equal to 2021",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present"
 ]
}

 The dataset includes 11248339 records from 4001 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0275697-220831081235567/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.j9qksa
title: Occurrence Download

description: A dataset containing 143 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is CardObs : Observations naturalistes issues de l'outil CardObs-Données naturalistes de Bruno OGER",
 "Country is Croatia"
 ]
}

 The dataset includes 143 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027243-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.br3pj2
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Pomatoschistus canestrinii (Ninni, 1883)",
 "HasCoordinate is true",
 "Year is greater than or equal to 2013",
 "Year is less than or equal to 2018",
 "CoordinateUncertaintyInMeters is less than or equal to 1000"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027244-241024112534372/datasets/export for details.
DOI: 10.15468/dl.kf2zpu
title: Occurrence Download

description: A dataset containing 134 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Collection Polychaeta SMF",
 "Country is Croatia"
 ]
}

 The dataset includes 134 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027247-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.14042715
title: Logger_2,_Blessberg,_Breitenbach_2024

description: # Logger_2,_Blessberg,_Breitenbach_2024

## DOI10.5281/zenodo.14042715

## Related DOI

## Data

### CategoryLoggerdata

### TypeCave air

### Measurement 1

#### VariableTemperature

#### Unit°C

#### Commentfixed on a stalactite, close to the wall

### Date

#### Start2020-12-12 06:00:00 GMT+01:00

#### End2024-05-09 14:00:00 GMT+01:00

#### Measurement interval60 min

### Download date2024-05-09 15:33:00

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42931

#### Longitude (E)11.01384

#### Height (m asl)499

### CaveBleßberghöhle

#### Local informationBaseball-Arena

#### Next survey point2/90

#### Distance from entry (m)170

#### Cover (m)56

## Measurement device

### DeviceHOBO U22-001 Water Temp

### Device SN2411291

### Internal nameLogger_2,_Blessberg,_Breitenbach

## ContactNorbert Marwan (marwan@pik-potsdam.de)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.15468/dl.qcqr6z
title: Occurrence Download

description: A dataset containing 1813951 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Observation, Machine Observation)",
 "CoordinateUncertaintyInMeters 0.0-1060.0",
 "GbifRegion is Europe and Central Asia",
 "LifeStage is Adult",
 "OccurrenceStatus is Present",
 "TaxonKey is Odonata"
 ]
}

 The dataset includes 1813951 records from 56 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027181-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.3qshwb
title: Occurrence Download

description: A dataset containing 115 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Collection Aves (bird skins) SMF",
 "Country is Croatia"
 ]
}

 The dataset includes 115 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027245-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.x7ud4x
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Knipowitschia panizzae (Verga, 1841)",
 "HasCoordinate is true",
 "Year is greater than or equal to 2013",
 "Year is less than or equal to 2018",
 "CoordinateUncertaintyInMeters is less than or equal to 1000"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027248-241024112534372/datasets/export for details.
DOI: 10.15468/dl.shstef
title: Occurrence Download

description: A dataset containing 159 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Collection Bryozoa SMF",
 "Country is Croatia"
 ]
}

 The dataset includes 159 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027246-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.14042556
title: Norbert_BBH_Logger_7

description: # Norbert_BBH_Logger_7

## DOI10.5281/zenodo.14042556

## Related DOI

## Data

### CategoryLoggerdata

### TypeCave water

### Measurement 1

#### VariableTemperature

#### Unit°C

#### Commentunder water in sinter basin; corrupted data after 2021-06-30

### Date

#### Start2020-12-12 06:00:00 GMT+01:00

#### End2022-06-16 12:00:00 GMT+01:00

#### Measurement interval60 min

### Download date2022-06-16 13:12:00

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42965

#### Longitude (E)11.01239

#### Height (m asl)506

### CaveBleßberghöhle

#### Local informationGoldener Westen, Theke under water

#### Next survey point3/119

#### Distance from entry (m)59

#### Cover (m)26

## Measurement device

### DeviceHOBO UA-002-64 Pendant Temp/Light

### Device SN9899702

### Internal nameNorbert_BBH_Logger_7

## ContactNorbert Marwan (marwan@pik-potsdam.de)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.15468/dl.cyxrcy
title: Occurrence Download

description: A dataset containing 1339711 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is EBCC Atlas of European Breeding Birds"
 ]
}

 The dataset includes 1339711 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027118-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.jvq5hg
title: Occurrence Download

description: A dataset containing 17231 species occurrences available in GBIF matching the query:
{
 "and" : [
 "ScientificName is one of (Rhea pennata d'Orbigny, 1834)",
 "HasCoordinate is true"
 ]
}

 The dataset includes 17231 records from 17 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027249-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.68kkfv
title: Occurrence Download

description: A dataset containing 476743 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is Aranzadi Ringing Scheme (bird ring-recovery data)"
 ]
}

 The dataset includes 476743 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027107-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.14044663
title: Logger_1,_Blessberg,_Breitenbach_2024

description: # Logger_1,_Blessberg,_Breitenbach_2024

## DOI10.5281/zenodo.14044663

## Related DOI

## Data

### CategoryLoggerdata

### TypeCave air

### Measurement 1

#### VariableTemperature

#### Unit°C

#### Commentmounted on a rock, halfway between the floor and the ceiling

### Date

#### Start2020-12-12 06:00:00 GMT+01:00

#### End2024-05-09 14:00:00 GMT+01:00

#### Measurement interval60 min

### Download date2024-05-09 15:28:00

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42992

#### Longitude (E)11.01227

#### Height (m asl)509

### CaveBleßberghöhle

#### Local informationVerbruchberg/ Harnischflächengang

#### Next survey point4/105

#### Distance from entry (m)115

#### Cover (m)25

## Measurement device

### DeviceHOBO U22-001 Water Temp

### Device SN968031

### Internal nameLogger_1,_Blessberg,_Breitenbach

## ContactNorbert Marwan (marwan@pik-potsdam.de)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.5281/zenodo.14042640
title: Logger_1,_Blessberg,_Breitenbach_2024

description: # Logger_1,_Blessberg,_Breitenbach_2024

## DOI10.5281/zenodo.14042640

## Related DOI

## Data

### CategoryLoggerdata

### TypeCave air

### Measurement 1

#### VariableTemperature

#### Unit°C

#### Commentmounted on a rock, halfway between the floor and the ceiling

### Date

#### Start2020-12-12 06:00:00 GMT+01:00

#### End2024-05-09 14:00:00 GMT+01:00

#### Measurement interval60 min

### Download date2024-05-09 15:28:00

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42992

#### Longitude (E)11.01227

#### Height (m asl)509

### CaveBleßberghöhle

#### Local informationVerbruchberg/ Harnischflächengang

#### Next survey point4/105

#### Distance from entry (m)115 m

#### Cover (m)25

## Measurement device

### DeviceHOBO U22-001 Water Temp

### Device SN968031

### Internal nameLogger_1,_Blessberg,_Breitenbach

## ContactNorbert Marwan (marwan@pik-potsdam.de)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.5281/zenodo.14042841
title: Stalagmate_mit_U2-SN885083-Zeitraum-20230529-20240410

description: # Stalagmate_mit_U2-SN885083-Zeitraum-20230529-20240410

## DOI10.5281/zenodo.14042841

## Related DOI10.5281/zenodo.14042828

## Data

### CategoryLoggerdata

### TypeCave drip rate

### Measurement 1

#### VariableDrip rate

#### UnitCounts

#### Commentat cave floor

### Date

#### Start2023-05-29 15:00:31

#### End2024-04-10 15:00:00

#### Measurement interval30 min

### Download date2024-04-10 15:26:13

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42980

#### Longitude (E)11.01190

#### Height (m asl)506

### CaveBleßberghöhle

#### Local informationGoldener Westen

#### Next survey point3/125

#### Distance from entry (m)18

#### Cover (m)16 ## Measurement device

### DeviceStalagmate TGC-0011

### Device SN885083

### Internal nameStalagmate_mit_U2-SN885083

## ContactSebastian Breitenbach (sebastian.breitenbach@northumbria.ac.uk)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.5281/zenodo.14042742
title: Stalagmate_mit_U1-SN885079-Zeitraum-20201212-20220507

description: # Stalagmate_mit_U1-SN885079-Zeitraum-20201212-20220507

## DOI10.5281/zenodo.14042742

## Related DOI

## Data

### CategoryLoggerdata

### TypeCave drip rate

### Measurement 1

#### VariableDrip rate

#### UnitCounts

#### Commentat cave floor

### Date

#### Start2020-12-12 06:00:07

#### End2022-05-07 13:00:00

#### Measurement interval30 min

### Download date2022-05-07 13:44:53

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42976

#### Longitude (E)11.01197

#### Height (m asl)505

### CaveBleßberghöhle

#### Local informationGoldener Westen

#### Next survey point3/124

#### Distance from entry (m)25

#### Cover (m)21

## Measurement device

### DeviceStalagmate TGC-0011

### Device SN885079

### Internal nameStalagmate_mit_U1-SN885079

## ContactSebastian Breitenbach (sebastian.breitenbach@northumbria.ac.uk)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.15468/dl.g7z2xc
title: Occurrence Download

description: A dataset listing the 64032 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is United Kingdom of Great Britain and Northern Ireland",
 "BasisOfRecord is one of (Human Observation)"
 ]
}

 The dataset's 64032 records were derived from 1174 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027187-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5281/zenodo.14042805
title: Stalagmate_mit_U1-SN885079-Zeitraum-20220507-20240317

description: # Stalagmate_mit_U1-SN885079-Zeitraum-20220507-20240317

## DOI10.5281/zenodo.14042805

## Related DOI10.5281/zenodo.14042742

## Data

### CategoryLoggerdata

### TypeCave drip rate

### Measurement 1

#### VariableDrip rate

#### UnitCounts

#### Commentat cave floor

### Date

#### Start2022-05-07 14:00:45

#### End2024-03-17 00:30:00

#### Measurement interval30 min

### Download date2024-04-10 15:17:14

## Location

### CountryGermany

### Coordinates

#### Latitude (N)50.42976

#### Longitude (E)11.01197

#### Height (m asl)505

### CaveBleßberghöhle

#### Local informationGoldener Westen

#### Next survey point3/124

#### Distance from entry (m)25

#### Cover (m)21

## Measurement device

### DeviceStalagmate TGC-0011

### Device SN885079

### Internal nameStalagmate_mit_U1-SN885079

## ContactSebastian Breitenbach (sebastian.breitenbach@northumbria.ac.uk)

## LicenceCreative Commons Attribution 4.0 International
DOI: 10.15468/dl.epsaby
title: Occurrence Download

description: A dataset containing 200 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Triturus carnifex (Laurenti, 1768)",
 "HasCoordinate is true",
 "Year is greater than or equal to 2013",
 "Year is less than or equal to 2018",
 "CoordinateUncertaintyInMeters is less than or equal to 1000"
 ]
}

 The dataset includes 200 records from 6 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027252-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.5258/soton/d3292
title: Dataset for Thesis: Unveiling perspectives: Systematic review of therapy experiences among UK Muslims and compassion views in British Muslim women'

description: Dataset for Doctoral Thesis: 
Interview transcripts
DOI: 10.15468/dl.xu2s2w
title: Occurrence Download

description: A dataset containing 179 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is CorMedNet- Distribution and demographic data of habitat-forming invertebrate species from Mediterranean coralligenous assemblages between 1882 and 2019.",
 "Country is Croatia"
 ]
}

 The dataset includes 179 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027251-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.uhdtrj
title: Occurrence Download

description: A dataset containing 133 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is DORSA - German Orthoptera Collections",
 "Country is Croatia"
 ]
}

 The dataset includes 133 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027254-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dzk8yn
title: Occurrence Download

description: A dataset containing 113 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Diveboard - Scuba diving citizen science observations",
 "Country is Croatia"
 ]
}

 The dataset includes 113 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027255-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.xb8ykb
title: Occurrence Download

description: A dataset listing the 3 species recorded in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-23.24786 -42.59270,65.93426 -42.59270,65.93426 -6.93512,-23.24786 -6.93512,-23.24786 -42.59270))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Gossypium barbadense L."
 ]
}

 The dataset's 3 records were derived from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0027196-241024112534372/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17031/66f55cb9f0b08
title: Dove Time Series WP2 Microsope and FlowCam

description: Zooplankton (predominantly haloplankton) abundance per metre3 data from 1969 - 2008; 55.116667,  -1.33333; collected monthly weather permitting via a WP2 net towed vertically 4 times, processing consisted of subsampling using a stempel pipette and all predominantly holoplankton identified or  Each sample was gently mixed by inverting several times and then > 1mm fraction analysed under a microscope. 100ml of the sample was taken and loaded into a Folsom plankton splitter. The Folsom sample was split until estimated visually to be of a suitable density for subsequent analysis in the FlowCAM image analyser. The Folsom fraction was then placed in a small beaker and further diluted, typically to 50ml.
DOI: 10.5281/zenodo.13909077
title: Merged HLS2 and GEDI data for estimating canopy height with IBM's granite-geospatial-canopyheight model

description: This dataset contains merged Harmonized Landsat-Sentinel 2 (HLS2) (L30 only) and Global Ecosystem Dynamics Investigation (GEDI) L2A data following CRS:4326. It has been assembled for estimating canopy height with a fine-tuned granite geospatial foundation model developed by IBM Research. Please see https://huggingface.co/ibm-granite/granite-geospatial-canopyheight for more information on data preparation and model use.

HLS2—Masek, J., J. Ju, J. Roger, S. Skakun, E. Vermote, M. Claverie, J. Dungan, Z. Yin, B. Freitag, C. Justice. HLS Sentinel-2 MSI Surface Reflectance Daily Global 30m v2.0. 2021, distributed by NASA EOSDIS Land Processes DAAC, https://doi.org/10.5067/HLS/HLSS30.002 

GEDI L2A—Lee, J., S. Favrichon, S. Mauceri, Y. Yang, J. Armston, and S. Saatchi. 2023. Addressing underestimation in global forest structure mapping. https://doi.org/10.22541/essoar.167276451.10705079/v1