cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.7274/25607772
title: Large Parallel Adaptive Multiscale Modeling of Interfaces

description: The computationally demanding nature of multiscale modeling (e.g., Computational Homogenization (CH)) necessitates the development of parallel and adaptive strategies for industrial-scale applications. Accordingly, this dissertation introduces an adaptive and parallel multiscale strategy for interface modeling. It adopts an adaptive approach, selecting between two microscale models through an offline database. This database utilizes nonlinear classifiers based on Support Vector Regression (SVR) constructed from microscale sampling data to serve as a preprocessing step for multiscale simulations. A co-designed parallel network library, facilitating seamless model selection, integrates tailored communication layers to ensure scalability, which is essential in parallel computing environments. This work presents a novel multiscale solver capable of executing high-fidelity, large-scale engineering simulations. The implementation of the solver is verified and validated through the application, demonstrating its ability to capture the physics observed in experimental data at both macro and micro scales. This is illustrated through the analysis of the failure of a large wind turbine blade.
DOI: 10.7274/25607772.v1
title: Large Parallel Adaptive Multiscale Modeling of Interfaces

description: The computationally demanding nature of multiscale modeling (e.g., Computational Homogenization (CH)) necessitates the development of parallel and adaptive strategies for industrial-scale applications. Accordingly, this dissertation introduces an adaptive and parallel multiscale strategy for interface modeling. It adopts an adaptive approach, selecting between two microscale models through an offline database. This database utilizes nonlinear classifiers based on Support Vector Regression (SVR) constructed from microscale sampling data to serve as a preprocessing step for multiscale simulations. A co-designed parallel network library, facilitating seamless model selection, integrates tailored communication layers to ensure scalability, which is essential in parallel computing environments. This work presents a novel multiscale solver capable of executing high-fidelity, large-scale engineering simulations. The implementation of the solver is verified and validated through the application, demonstrating its ability to capture the physics observed in experimental data at both macro and micro scales. This is illustrated through the analysis of the failure of a large wind turbine blade.
DOI: 10.15468/dl.8qpat2
title: Occurrence Download

description: A dataset containing 5206 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is one of (Bidens bipinnata Hook. & Arn., Bidens pinnata Noronha, Bidens connata Muhl. ex Willd., Bidens connata Muhl., Bidens cornuta Sherff, Bidens coronata Britton ex Sherff, 1913, Bidens cognata Greene, Bidens coronata (L.) Fisch., Bidens coronata (L.) Fisch. ex Britton, Bidens coronata Fisch. ex Colla)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year is greater than or equal to 2000"
 ]
}

 The dataset includes 5206 records from 147 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007759-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tftjak
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Pelophylax esculentus (Linnaeus, 1758)",
 "Year is 33",
 "Country is Netherlands"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007761-241107131044228/datasets/export for details.
DOI: 10.7274/25607823
title: The Development of Hybrid Volitional Control for Robotic Transtibial Prostheses

description: This dissertation contributes fundamental advances to the control of robotic transtibial prostheses by developing and assessing hybrid volitional control (HVC), a novel modular control framework. HVC is designed to enable reliable autonomous control for standard cyclic tasks, as well as direct user control to alter or augment the behavior of the prosthetic ankle and achieve non-standard tasks at the user’s discretion. In this dissertation, HVC is investigated through three primary pursuits. Firstly, a framework for HVC applied across the full gait cycle is presented for robotic ankle control, and its implementation is demonstrated by combining finite-state machine (FSM) impedance control with direct myoelectric control (DMC). The utility of HVC is shown, in that it allows users to walk on level ground with biomechanics similar to able-bodied individuals, as well as to volitionally stand on tip-toes, tap the foot, side step, walk backwards, and kick. Secondly, different volitional calibration postures and their relationships with volitional control performance are investigated to fill the need for calibration standardization within HVC and all myoelectric control approaches. Fundamental calibration differences due to lower-limb muscular physiology of individuals with and without amputation are uncovered, and myoelectric calibration recommendations are made. Thirdly, a novel continuous phase variable impedance control approach based on the global tibia kinematics is used to ultimately improve the performance of HVC. This HVC implementation enables seamless transition to other cyclic tasks, such as ramp ascent and descent, by volitionally adapting the controller without requiring task classification or additional controller tuning. User feedback throughout this work shows that HVC is more useful and produces higher overall satisfaction compared to various autonomous controllers. Effectively incorporating the volitional input of the user with reliable autonomous control via HVC offers a pathway to further improve the mobility, independence, and quality of life of individuals with amputation.
DOI: 10.7274/25607823.v1
title: The Development of Hybrid Volitional Control for Robotic Transtibial Prostheses

description: This dissertation contributes fundamental advances to the control of robotic transtibial prostheses by developing and assessing hybrid volitional control (HVC), a novel modular control framework. HVC is designed to enable reliable autonomous control for standard cyclic tasks, as well as direct user control to alter or augment the behavior of the prosthetic ankle and achieve non-standard tasks at the user’s discretion. In this dissertation, HVC is investigated through three primary pursuits. Firstly, a framework for HVC applied across the full gait cycle is presented for robotic ankle control, and its implementation is demonstrated by combining finite-state machine (FSM) impedance control with direct myoelectric control (DMC). The utility of HVC is shown, in that it allows users to walk on level ground with biomechanics similar to able-bodied individuals, as well as to volitionally stand on tip-toes, tap the foot, side step, walk backwards, and kick. Secondly, different volitional calibration postures and their relationships with volitional control performance are investigated to fill the need for calibration standardization within HVC and all myoelectric control approaches. Fundamental calibration differences due to lower-limb muscular physiology of individuals with and without amputation are uncovered, and myoelectric calibration recommendations are made. Thirdly, a novel continuous phase variable impedance control approach based on the global tibia kinematics is used to ultimately improve the performance of HVC. This HVC implementation enables seamless transition to other cyclic tasks, such as ramp ascent and descent, by volitionally adapting the controller without requiring task classification or additional controller tuning. User feedback throughout this work shows that HVC is more useful and produces higher overall satisfaction compared to various autonomous controllers. Effectively incorporating the volitional input of the user with reliable autonomous control via HVC offers a pathway to further improve the mobility, independence, and quality of life of individuals with amputation.
DOI: 10.15468/dl.yb8384
title: Occurrence Download

description: A dataset containing 521 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is India",
 "OccurrenceStatus is Present",
 "TaxonKey is Prosopis juliflora (Sw.) DC."
 ]
}

 The dataset includes 521 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007762-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.7274/25608510
title: Direct Computation of Wall-Pressure Fluctuations in Weakly Compressible Turbulent Wall-Bounded Flows

description: Knowledge of wall-pressure fluctuations in turbulent wall-bounded flows is important for predictions of structural vibration and noise. In this study, compressible direct numerical simulations with a sixth-order, non-dissipative finite difference scheme are employed to accurately capture the spatiotemporal characteristics of wall-pressure fluctuations in low-Mach-number turbulent wall-bounded flows. Turbulent channel flow simulations are conducted at bulk Mach numbers 0.4, 0.2 and 0.1, and friction Reynolds number 180. In addition to the convective ridge that is virtually Mach number independent, acoustic ridges, whose magnitudes are orders of magnitude lower, are identified in the two-dimensional wavenumber-frequency spectrum. At lower frequencies, the acoustic ridges represent propagating longitudinal and oblique waves that match the theoretical predictions of two-dimensional duct modes with a uniform mean flow. They decay with decreasing Mach numbers but remain distinctly identifiable even at Mach 0.1. At high frequencies, in contrast, no propagating waves are found, and the spectral level in the supersonic wavenumber range is broadly elevated and increases with decreasing Mach number.

At Mach 0.4, two additional simulations are carried out, one in a plane channel at friction Reynolds number 500 to explore the Reynolds number effect, and the other in a channel with a surface hump at friction Reynolds number 180 to examine the impact of surface inhomogeneity. A strong Reynolds number dependence is observed in the subconvective wavenumber region, where the spectral level shows a significant elevation with increasing Reynolds number, especially at higher frequencies. The presence of the small two-dimensional hump along the spanwise direction is shown to vastly increase the acoustic energy for both longitudinal and oblique modes as well as the broadband subconvective spectral level as a result of diffraction and turbulence generation induced by the hump.

Moreover, the fluctuating wall pressure beneath a flat-plate turbulent boundary layer is investigated at freestream Mach number 0.4 and momentum-thickness Reynolds numbers up to 1918. The results reveal the presence of acoustic ridges associated with longitudinally propagating waves in the two-dimensional wavenumber-frequency spectra. These acoustic ridges are less prominent compared with their counterparts in the plane channel. With proper frequency scaling, the convective ridges in TBL and plane-channel flows are found to be nearly identical. A small two-dimensional surface hump is found to substantially increase the acoustic energy for the downstream propagating waves downstream of the hump, but has less impact on the upstream region.
DOI: 10.7274/25608510.v1
title: Direct Computation of Wall-Pressure Fluctuations in Weakly Compressible Turbulent Wall-Bounded Flows

description: Knowledge of wall-pressure fluctuations in turbulent wall-bounded flows is important for predictions of structural vibration and noise. In this study, compressible direct numerical simulations with a sixth-order, non-dissipative finite difference scheme are employed to accurately capture the spatiotemporal characteristics of wall-pressure fluctuations in low-Mach-number turbulent wall-bounded flows. Turbulent channel flow simulations are conducted at bulk Mach numbers 0.4, 0.2 and 0.1, and friction Reynolds number 180. In addition to the convective ridge that is virtually Mach number independent, acoustic ridges, whose magnitudes are orders of magnitude lower, are identified in the two-dimensional wavenumber-frequency spectrum. At lower frequencies, the acoustic ridges represent propagating longitudinal and oblique waves that match the theoretical predictions of two-dimensional duct modes with a uniform mean flow. They decay with decreasing Mach numbers but remain distinctly identifiable even at Mach 0.1. At high frequencies, in contrast, no propagating waves are found, and the spectral level in the supersonic wavenumber range is broadly elevated and increases with decreasing Mach number.

At Mach 0.4, two additional simulations are carried out, one in a plane channel at friction Reynolds number 500 to explore the Reynolds number effect, and the other in a channel with a surface hump at friction Reynolds number 180 to examine the impact of surface inhomogeneity. A strong Reynolds number dependence is observed in the subconvective wavenumber region, where the spectral level shows a significant elevation with increasing Reynolds number, especially at higher frequencies. The presence of the small two-dimensional hump along the spanwise direction is shown to vastly increase the acoustic energy for both longitudinal and oblique modes as well as the broadband subconvective spectral level as a result of diffraction and turbulence generation induced by the hump.

Moreover, the fluctuating wall pressure beneath a flat-plate turbulent boundary layer is investigated at freestream Mach number 0.4 and momentum-thickness Reynolds numbers up to 1918. The results reveal the presence of acoustic ridges associated with longitudinally propagating waves in the two-dimensional wavenumber-frequency spectra. These acoustic ridges are less prominent compared with their counterparts in the plane channel. With proper frequency scaling, the convective ridges in TBL and plane-channel flows are found to be nearly identical. A small two-dimensional surface hump is found to substantially increase the acoustic energy for the downstream propagating waves downstream of the hump, but has less impact on the upstream region.
DOI: 10.15468/dl.9dtr6n
title: Occurrence Download

description: A dataset containing 5277 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Abaeis nicippe (Cramer, 1779)",
 "BasisOfRecord is one of (Specimen)"
 ]
}

 The dataset includes 5277 records from 89 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0007760-241107131044228/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.wq3px4
title: Occurrence Download

description: A dataset containing 498 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gossypium tomentosum Nutt. ex Seem."
 ]
}

 The dataset includes 498 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0339676-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.u6wqor
title: Occurrence Download

description: A dataset containing 1634 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Agosia chrysogaster Girard, 1856"
 ]
}

 The dataset includes 1634 records from 33 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006737-180730143533302/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8qzn6s
title: Occurrence Download

description: A dataset containing 279 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "TaxonKey is Ambystoma mexicanum (Shaw & Nodder, 1798)"
 ]
}

 The dataset includes 279 records from 14 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0047276-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.5sbpmm
title: Occurrence Download

description: A dataset containing 193 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Encelia resinifera C.Clark",
 "HasCoordinate is true",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 193 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0057582-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kzjg0b
title: Occurrence Download

description: A dataset containing 1905 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Plantae",
 "DecimalLatitude is greater than 19.3942829332526",
 "DecimalLatitude is less than 19.9642361417073",
 "DecimalLongitude is greater than -156.328961165686",
 "DecimalLongitude is less than -155.732072760541"
 ]
}

 The dataset includes 1905 records from 20 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006737-180824113759888/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8bwcnq
title: Occurrence Download

description: A dataset containing 626957 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is Europe",
 "Country is Germany",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Year 2000-2020"
 ]
}

 The dataset includes 626957 records from 163 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0079101-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kx6mky
title: Occurrence Download

description: A dataset containing 3 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Manuherikia douglasi Worthy, Tennyson, Hand & Scofield, 2008"
 ]
}

 The dataset includes 3 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0052804-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.bs1qqx
title: Occurrence Download

description: A dataset containing 57 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pteropus niger (Kerr, 1792)"
 ]
}

 The dataset includes 57 records from 13 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0006737-181108115102211/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.8sukpx
title: Occurrence Download

description: A dataset containing 1 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Continent is North America",
 "Country is Mexico",
 "TaxonKey is Lynx rufus (Schreber, 1777)",
 "Year 2010-2020"
 ]
}

 The dataset includes 1 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0068703-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kc5sfw
title: Occurrence Download

description: A dataset containing 156 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((57.34863 25.23675,61.21582 24.11868,63.14941 25.71282,64.2041 27.909,62.53418 31.12067,61.83105 33.49743,62.18262 37.01308,57.34863 39.02089,53.12988 38.12764,50.31738 38.05847,48.99902 39.22544,46.62598 40.30634,45.4834 39.49726,43.46191 39.56505,44.60449 34.87872,47.15332 32.5394,47.59277 30.74372,50.49316 28.06422,56.54526 26.33748,56.43745 25.79606,57.34863 25.23675))",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Eumeces schneiderii (Daudin, 1802)"
 ]
}

 The dataset includes 156 records from 7 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0057553-210914110416597/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.bg34bb
title: Occurrence Download

description: A dataset containing 175 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Exostratum blumii L.Ellis, 1985"
 ]
}

 The dataset includes 175 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048885-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.1yez3t
title: Occurrence Download

description: A dataset containing 2165 species occurrences available in GBIF matching the query:
{
 "and" : [
 {
 "or" : [
 "Country is Guatemala",
 "Country is Mexico",
 "Country is Belize",
 "Country is Nicaragua",
 "Country is Honduras",
 "Country is El Salvador"
 ]
 },
 {
 "or" : [
 "TaxonKey is Rhinoclemmys areolata (Duméril, Bibron & Duméril, 1851)",
 "TaxonKey is Lepidophyma mayae Bezy, 1973",
 "TaxonKey is Rhadinella pilonaorum (Stuart, 1954)",
 "TaxonKey is Agkistrodon bilineatus Günther, 1863",
 "TaxonKey is Claudius angustatus Cope, 1865",
 "TaxonKey is Kinosternon acutum Gray, 1831",
 "TaxonKey is Kinosternon acuta Spinks Et Al., 2014",
 "TaxonKey is Staurotypus salvinii Gray, 1864",
 "TaxonKey is Staurotypus salvini Günther, 1885",
 "TaxonKey is Staurotypus triporcatus (Wiegmann, 1828)",
 "TaxonKey is Staurotypus triporcatus Duméril & Bibron, 1835"
 ]
 }
 ]
}

 The dataset includes 2165 records from 71 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004343-180508205500799/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.qcemlt
title: Occurrence Download

description: A dataset containing 20998084 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-109.90723 22.91792,-109.29199 26.03704,-105.77637 21.53485,-105.16113 19.55979,-101.29395 17.14079,-97.60254 15.96133,-95.05371 16.04581,-93.20801 15.28419,-90.65918 13.83808,-89.60449 15.02969,-91.27441 17.81146,-88.98926 18.14585,-87.75879 19.47695,-86.87988 21.04349,-88.46191 21.45307,-90.30762 20.71502,-91.80176 18.56295,-95.1416 18.39623,-95.93262 19.14517,-97.51465 21.1255,-97.69043 24.28703,-97.33887 25.95804,-98.65723 26.5099,-100.7666 29.30556,-102.34863 29.61167,-103.75488 29.38218,-105.5127 31.1282,-107.3584 31.57854,-111.22559 31.50363,-117.55371 32.84267,-115.18066 29.38218,-114.65332 27.37177,-112.9834 26.58853,-112.0166 24.84657,-109.90723 22.91792))",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 20998084 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004930-191105090559680/datasets/export for details.
DOI: 10.15468/dl.qygshp
title: Occurrence Download

description: A dataset containing 227543 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Phaseolus vulgaris L."
 ]
}

 The dataset includes 227543 records from 352 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0048882-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.