cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25381/cput.30598670
title: Impact damage assessment of sandwich composite materials using non-destructive techniques

description: This study examines the low-velocity impact response and damage tolerance of sandwich composites fabricated via the autoclave process. A detailed damage assessment was conducted on specimens comprising glass fibre-reinforced polymer (GFRP) and carbon fibre-reinforced polymer (CFRP) face sheets, with a polyvinyl chloride (PVC) foam core. Initial mechanical testing was performed to determine key material properties relevant to impact performance.Subsequent impact testing was carried out to evaluate damage behaviour under low-velocity conditions. Damage mechanisms were characterised using X-ray micro-computed tomography (micro-CT), a non-destructive technique that revealed matrix cracking, intra-laminar and inter-laminar delamination, fibre breakage, foam shearing, and densification across varying impact energy levels. BVID was shown to significantly reduce residual strength, thereby undermining structural integrity. ImageJ software was employed to validate the quality of the reconstructed CT images.To complement the experimental findings, a numerical study was conducted using nonlinear finite element (FE) analysis in Abaqus, integrated with a Fortran compiler. The computational framework incorporated a user-defined material subroutine (VUMAT) implementing 3D Hashin failure criteria. Notably, this study extended existing modelling approaches by integrating both ductile and shear damage into the PVC Crushable Plasticity model, an enhancement not commonly addressed in prior work.The inclusion of ductile damage enabled the simulation of progressive stiffness degradation due to plastic deformation, while shear damage was critical for capturing delamination and core-skin debonding phenomena. The foam core's post-yield behaviour prior to densification was effectively represented through ductile damage modelling, and shear damage accounted for sliding and tearing effects.These findings provide a valuable framework for evaluating and optimising newly developed composite materials for diverse engineering applications. Furthermore, the developed FE modelling approach contributes to the advancement of generalised methodologies for simulating deformation and failure in sandwich composite structures.
DOI: 10.25381/cput.30598670.v1
title: Impact damage assessment of sandwich composite materials using non-destructive techniques

description: This study examines the low-velocity impact response and damage tolerance of sandwich composites fabricated via the autoclave process. A detailed damage assessment was conducted on specimens comprising glass fibre-reinforced polymer (GFRP) and carbon fibre-reinforced polymer (CFRP) face sheets, with a polyvinyl chloride (PVC) foam core. Initial mechanical testing was performed to determine key material properties relevant to impact performance.Subsequent impact testing was carried out to evaluate damage behaviour under low-velocity conditions. Damage mechanisms were characterised using X-ray micro-computed tomography (micro-CT), a non-destructive technique that revealed matrix cracking, intra-laminar and inter-laminar delamination, fibre breakage, foam shearing, and densification across varying impact energy levels. BVID was shown to significantly reduce residual strength, thereby undermining structural integrity. ImageJ software was employed to validate the quality of the reconstructed CT images.To complement the experimental findings, a numerical study was conducted using nonlinear finite element (FE) analysis in Abaqus, integrated with a Fortran compiler. The computational framework incorporated a user-defined material subroutine (VUMAT) implementing 3D Hashin failure criteria. Notably, this study extended existing modelling approaches by integrating both ductile and shear damage into the PVC Crushable Plasticity model, an enhancement not commonly addressed in prior work.The inclusion of ductile damage enabled the simulation of progressive stiffness degradation due to plastic deformation, while shear damage was critical for capturing delamination and core-skin debonding phenomena. The foam core's post-yield behaviour prior to densification was effectively represented through ductile damage modelling, and shear damage accounted for sliding and tearing effects.These findings provide a valuable framework for evaluating and optimising newly developed composite materials for diverse engineering applications. Furthermore, the developed FE modelling approach contributes to the advancement of generalised methodologies for simulating deformation and failure in sandwich composite structures.
DOI: 10.17026/dans-x4e-94e8
title: Inheemse bewoning uit de ijzertijd en Romeinse tijd in plangebied Naaldwijk-Nieuwe Naaldhorst (gemeente Westland)
title: Een Archeologisch Inventariserend Veldonderzoek door middel van proefsleuven

description: &lt;p&gt;In opdracht van de gemeente Westland heeft Archeologisch Onderzoek Leiden (Archol BV) een verkennend archeologisch onderzoek uitgevoerd door middel van proefsleuven in plangebied Nieuwe Naaldhorst te Naaldwijk. Voorgaand booronderzoek heeft aangetoond dat het plangebied zich deels op de flank van een haakwal met duinafzettingen bevindt en deels op geul- en komafzettingen. Opgravingen in de directe omgeving hebben uitgewezen dat vooral op de haakwal bewoningssporen uit de Romeinse tijd zijn te verwachten.&lt;br&gt;Het proefsleuvenonderzoek heeft weliswaar de resten van deze haakwal in het zuidwesten aangetoond, maar de top van het zandlichaam blijkt geen bewoningssporen uit de Romeinse tijd te bevatten. Sporen uit deze periode zijn daarentegen wel in het omringende, lager gelegen kleigebied gevonden. Ze bestaan uit enkele greppels en een sloot. Het ontbreken van overige spoortypen zoals (paal)kuilen of waterputten van een nederzetting en de geringe hoeveelheid vondsten wijzen er op dat het terrein in de Romeinse tijd in gebruik moet zijn geweest als een buitengebied, bijvoorbeeld als akker- of weidegebied. De greppels zijn vermoedelijk gegraven voor de ontwatering van het (wellicht toen al) drassige terrein en voor de afbakening van percelen. Enkele greppels en sloten uit de late middeleeuwen en nieuwe tijd wijzen op een zelfde gebruik in deze perioden.&lt;br&gt;De belangrijkste ontdekking is in de zuidoosthoek van het plangebied gedaan. Hier zijn op twee stratigrafisch gescheiden niveaus in het kleidek sporen en vondsten uit de ijzertijd aangetroffen. Afdekkende kleilagen hebben beide niveaus goed beschermd tegen latere verstoringen zoals ploeg- of graafactiviteiten. Meest opvallend spoor is een boogvormige greppel op het bovenste ijzertijdniveau. In de sporen en de omgevende kleilagen van beide niveaus zijn vondsten van aardewerk, steen en bot gedaan. Samen lijken de archeologische resten te wijzen op de aanwezigheid van een nederzetting uit de (vroeg en late) ijzertijd. Vermoedelijk hebben de sleuven in het zuiden van het plangebied net de noordelijke randzone van deze vindplaats aangesneden. De kern is ten zuiden van de sleuven te verwachten. Het onderste, oudste ijzertijdniveau is wellicht te relateren aan de vondst van een Harpstedt-pot ca. 50 tot 100 m zuidelijker in de bouwput van het zwembad. Ter hoogte van dit zwembad zijn bij voorgaand onderzoek tevens belangrijke nederzettingssporen uit de Romeinse tijd ontdekt.&lt;/p&gt;
description: Date Copyrighted: 2008
description: Date Submitted: 2011-06-20
DOI: 10.15468/dl.54824t
title: Occurrence Download

description: A dataset containing 447576 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Senecio inaequidens"
 ]
}

 The dataset includes 447576 records from 1270 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007423-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.24403/jp.1512716
title: Vielfalt leben, Teilhabe ermöglichen, Zukunft gestalten : Die Stadtbibliothek Bremen / Angebote für Kongressbesucherinnen und -besucher / Anika Schmidt, Lucia Werder
DOI: 10.25381/cput.30609305
title: Multiple sclerosis in relation to diagnosis and disability progression

description: Ethical Reference # CPUT/HW-REC 2019/H27Description of data: This dataset comprises brain volumes for several brain areas. Brain volumes were calculated using the FLAIR and T1 pictures and the Sequence Adaptive Multimodal SEGmentation (SAMSEG) software, which is included in FreeSurfer 7.2.
DOI: 10.25381/cput.30609305.v1
title: Multiple sclerosis in relation to diagnosis and disability progression

description: Ethical Reference # CPUT/HW-REC 2019/H27Description of data: This dataset comprises brain volumes for several brain areas. Brain volumes were calculated using the FLAIR and T1 pictures and the Sequence Adaptive Multimodal SEGmentation (SAMSEG) software, which is included in FreeSurfer 7.2.
DOI: 10.15468/dl.wfp8nz
title: Occurrence Download

description: A dataset containing 140 records in GBIF matching the query:
SELECT
 kingdom,
 kingdomkey,
 phylum,
 phylumkey,
 class,
 classkey,
 "order",
 orderkey,
 family,
 familykey,
 genus,
 genuskey,
 species,
 specieskey,
 "year",
 IF(ISNULL(kingdomkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY kingdomkey, "year")) kingdomcount,
 IF(ISNULL(phylumkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY phylumkey, "year")) phylumcount,
 IF(ISNULL(classkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY classkey, "year")) classcount,
 IF(ISNULL(orderkey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY orderkey, "year")) ordercount,
 IF(ISNULL(familykey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY familykey, "year")) familycount,
 IF(ISNULL(genuskey), NULL, SUM(COUNT(*)) OVER (
 PARTITION BY genuskey, "year")) genuscount,
 COUNT(*) occurrences,
 MIN(GBIF_TEMPORALUNCERTAINTY(eventdate, eventtime)) mintemporaluncertainty,
 MIN(COALESCE(coordinateuncertaintyinmeters, 1000)) mincoordinateuncertaintyinmeters
FROM
 occurrence
WHERE
 occurrence.countrycode = 'CL'
 AND occurrence.occurrencestatus = 'PRESENT'
 AND (CAST(occurrence.taxonkey AS INTEGER) = 2978223 OR CAST(occurrence.acceptedtaxonkey AS INTEGER) = 2978223 OR CAST(occurrence.kingdomkey AS INTEGER) = 2978223 OR CAST(occurrence.phylumkey AS INTEGER) = 2978223 OR CAST(occurrence.classkey AS INTEGER) = 2978223 OR CAST(occurrence.orderkey AS INTEGER) = 2978223 OR CAST(occurrence.familykey AS INTEGER) = 2978223 OR CAST(occurrence.genuskey AS INTEGER) = 2978223 OR CAST(occurrence.specieskey AS INTEGER) = 2978223)
 AND occurrence.hasgeospatialissues = FALSE
 AND NOT GBIF_STRINGARRAYCONTAINS(occurrence.issue, 'TAXON_MATCH_FUZZY', TRUE)
 AND (occurrence.distancefromcentroidinmeters &gt;= 2000.0 OR occurrence.distancefromcentroidinmeters IS NULL)
 AND NOT occurrence.basisofrecord IN ('FOSSIL_SPECIMEN', 'LIVING_SPECIMEN')
 AND (occurrence.specieskey IS NOT NULL AND occurrence."year" IS NOT NULL)
GROUP BY
 occurrence.kingdom,
 occurrence.kingdomkey,
 occurrence.phylum,
 occurrence.phylumkey,
 occurrence.class,
 occurrence.classkey,
 occurrence."order",
 occurrence.orderkey,
 occurrence.family,
 occurrence.familykey,
 occurrence.genus,
 occurrence.genuskey,
 occurrence.species,
 occurrence.specieskey,
 occurrence."year"

 The dataset's 140 records were derived from 34 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007442-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5nnwd8
title: Occurrence Download

description: A dataset containing 33 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Europe",
 "TaxonKey is Ceratocystis platani"
 ]
}

 The dataset includes 33 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007462-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25381/cput.30614642
title: Exploring trainers' experiences of distance education at the South African military academy

description: Like some government departments, the South African National Defence Force (SANDF) continuously seeks to improve the quality of service through various initiatives presented in the White Paper on Defence. The SANDF continuously seeks to restore legitimacy in South Africa through professional military education and training. Continuous professional development is one of the crucial processes used to improve the quality of services by making the personnel aware of development trends and the use of new technologies. The South African Military Academy (SAMA) a training unit in the SANDF provides a qualification-based course in distance education mode in partnership with Stellenbosch University to young officers to imbue them with a knowledge framework and to equip them for career opportunities. The evolution of Information and Communication Technology (ICT) and online educational platforms are gradually being embraced as means for providing distance education, thereby bringing new experiences and challenges to the SAMA that educators had to deal with. Military educators may have difficulties coping with these changes and challenges. Their experiences with these changes and challenges are essential in sustaining the provision of distance education through both paper and electronic forms. This study aimed to explore the experiences of these military educators in distance education at the SAMA in the Western Cape to gain a deeper understanding of how their experiences affect distance education. The study was conducted at the SAMA. The purpose of this proposal is to provide a narrative justifying the need to conduct a study to explore the experiences of educators in the defence force concerning distance education and training environments in the face of the influence of information and communication technologies. The study population consisted of 66 military educators of which purposive sampling was used to choose the sample of individuals to interview. The research employed a case study at the SAMA through a qualitative approach in which data was collected using interviews. Data was interpreted qualitatively, and the findings were organised into key themes. The findings and recommendations ensuing from the study contribute towards the quality and effectiveness of distance education.
DOI: 10.25381/cput.30614642.v1
title: Exploring trainers' experiences of distance education at the South African military academy

description: Like some government departments, the South African National Defence Force (SANDF) continuously seeks to improve the quality of service through various initiatives presented in the White Paper on Defence. The SANDF continuously seeks to restore legitimacy in South Africa through professional military education and training. Continuous professional development is one of the crucial processes used to improve the quality of services by making the personnel aware of development trends and the use of new technologies. The South African Military Academy (SAMA) a training unit in the SANDF provides a qualification-based course in distance education mode in partnership with Stellenbosch University to young officers to imbue them with a knowledge framework and to equip them for career opportunities. The evolution of Information and Communication Technology (ICT) and online educational platforms are gradually being embraced as means for providing distance education, thereby bringing new experiences and challenges to the SAMA that educators had to deal with. Military educators may have difficulties coping with these changes and challenges. Their experiences with these changes and challenges are essential in sustaining the provision of distance education through both paper and electronic forms. This study aimed to explore the experiences of these military educators in distance education at the SAMA in the Western Cape to gain a deeper understanding of how their experiences affect distance education. The study was conducted at the SAMA. The purpose of this proposal is to provide a narrative justifying the need to conduct a study to explore the experiences of educators in the defence force concerning distance education and training environments in the face of the influence of information and communication technologies. The study population consisted of 66 military educators of which purposive sampling was used to choose the sample of individuals to interview. The research employed a case study at the SAMA through a qualitative approach in which data was collected using interviews. Data was interpreted qualitatively, and the findings were organised into key themes. The findings and recommendations ensuing from the study contribute towards the quality and effectiveness of distance education.
DOI: 10.15468/dl.v232cr
title: Occurrence Download

description: A dataset containing 226 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Europe",
 "TaxonKey is Xylella fastidiosa"
 ]
}

 The dataset includes 226 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007464-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.z385ca
title: Occurrence Download

description: A dataset containing 10 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Antarctica",
 "OccurrenceStatus is Present",
 "TaxonKey is Ceratophysella denticulata"
 ]
}

 The dataset includes 10 records from 3 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007465-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5z3a46
title: Occurrence Download

description: A dataset containing 12 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is Lund University Biological Museum - Insect collections Specimens",
 "TaxonKey is Brintesia circe"
 ]
}

 The dataset includes 12 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007467-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.dd7npt
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Antarctica",
 "OccurrenceStatus is Present",
 "TaxonKey is Folsomia candida"
 ]
}

 The dataset includes 2 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007466-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.j88pyh
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Antarctica",
 "OccurrenceStatus is Present",
 "TaxonKey is Porcellio scaber"
 ]
}

 The dataset includes 3 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007469-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.6084/m9.figshare.30662408
title: <b>Data for "</b>Nitrogen enrichment amplifies the role of dominant species in sustaining ecosystem multifunctionality across spatial scales<b>"</b>

description: Using an eight-year field experiment in a subalpine meadow that combined N addition with the removal of either dominant grasses or subordinate forbs, we tested whether ecosystem multifunctionality under N enrichment is sustained by species diversity or by dominant species from local (α-) to larger (γ-) spatial scales. We found that removing dominant grasses, sharply reduced multifunctionality at both α- and γ-scales, despite increasing plant diversity. In contrast, removing subordinate forbs reduced diversity but had little impact on multifunctionality, as the remaining dominant grasses continued to support key ecosystem functions. Nitrogen enrichment further strengthened the role of these dominant species.
DOI: 10.6084/m9.figshare.30662408.v1
title: <b>Data for "Plant dominance rather than diversity sustains multifunctionality across scales under nitrogen enrichment"</b>

description: Using an eight-year field experiment in a subalpine meadow that combined N addition with the removal of either dominant grasses or subordinate forbs, we tested whether ecosystem multifunctionality under N enrichment is sustained by species diversity or by dominant species from local (α-) to larger (γ-) spatial scales. We found that removing dominant grasses, sharply reduced multifunctionality at both α- and γ-scales, despite increasing plant diversity. In contrast, removing subordinate forbs reduced diversity but had little impact on multifunctionality, as the remaining dominant grasses continued to support key ecosystem functions. Nitrogen enrichment further strengthened the role of these dominant species.
DOI: 10.6084/m9.figshare.30662408.v2
title: <b>Data for "</b>Nitrogen enrichment amplifies the role of dominant species in sustaining ecosystem multifunctionality across spatial scales<b>"</b>

description: Using an eight-year field experiment in a subalpine meadow that combined N addition with the removal of either dominant grasses or subordinate forbs, we tested whether ecosystem multifunctionality under N enrichment is sustained by species diversity or by dominant species from local (α-) to larger (γ-) spatial scales. We found that removing dominant grasses, sharply reduced multifunctionality at both α- and γ-scales, despite increasing plant diversity. In contrast, removing subordinate forbs reduced diversity but had little impact on multifunctionality, as the remaining dominant grasses continued to support key ecosystem functions. Nitrogen enrichment further strengthened the role of these dominant species.
DOI: 10.15468/dl.3pwbdf
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Sweden",
 "OccurrenceStatus is Present",
 "ScientificName is Gulo gulo",
 "TaxonKey is Gulo gulo",
 "Year 1980-2010"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007468-251120083545085/datasets/export for details.
DOI: 10.48804/njah7e
title: Replication Data for: Optimal Placement of Heat Pump Substations in District Heating Networks for Cost-Effective Temperature Reduction

description: A dataset containing the structure, input parameters and optimization results of the heating network, producer, and substations used in the test case of the paper "Optimal Placement of Heat Pump Substations in District Heating Networks for Cost-Effective Temperature Reduction". The optimization results can be replicated using the methodology and formulations described in the paper.
DOI: 10.13140/rg.2.2.26846.29766
title: U1 CONCEPT OF FM
DOI: 10.15468/dl.e2q5pw
title: Occurrence Download

description: A dataset containing 110 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Finland",
 "OccurrenceStatus is Present",
 "TaxonKey is Gulo gulo",
 "Year 1980-2010"
 ]
}

 The dataset includes 110 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007472-251120083545085/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.