Find research datasets worth reusing

Fig. 8 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 8. The camenellan tommotiid Dailyatia sp. 1 A sclerites and fragments from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Holyoake Range, Transantarctic Mountains, East Antarctica. A. A sclerite, NRM X10006, apical (A1), anterior (A2), oblique posterior (A3), and posterior (A4) views, magnification of radial plicae on the lateral field (A5), magnification of single plica showing the densely stacked growth series of the radial plicae (A6). B. Fragment of A sclerite anterior field, NRM X10007, general view (B1), oblique view showing cross section of plicae (B2). C. Fragment of A sclerite anterior field, NRM X10008, top of specimen (C1), general view (C2), detail showing plicae (C3). D. Fragment of A sclerite with partial lateral and anterior field, NRM X10009. E. Fragment of sclerite lateral field, NRM X10010. F. Fragment of A sclerite lateral field, NRM X10011. G. Fragment of unknown sclerite type, with chaotically distributed plicae, NRM X10012, general view (G1), detail (G2). Scale bars 200 µm.

Fig. 11. The tommotiid Shetlandia multiplicata Wrona, 2004, unknown type sclerite fragments from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 11. The tommotiid Shetlandia multiplicata Wrona, 2004, unknown type sclerite fragments from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Holyoake Range, Transantarctic Mountains, East Antarctica. A. NRM X10020, general view (A1), detail showing arched growth series (A2). B. NRM X10021, general view (B1), detail of broken margin (B2). C. NRM X10022, general view (C1), detail of comarginal ribs and broken edge (C2). D. NRM X10023. E. NRM X10024. Scale bars 200 µm, except B2, 100 µm. A–C taken with backscattered electron detector.

Fig. 5 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 5. The camenellan tommotiid Dailyatia icari sp. nov. C1 sclerites and sclerite fragments from the lower Cambrian Schneider Hills limestone, Schneider Hills, Argentina Range, East Antarctica. A. Dextral sclerite, KUMIP 585059, apical view (A1), view of dorsal (A2) and ventral (A3) surfaces, view of distal (A4) and proximal (A5) edges. B. Sinistral sclerite, KUMIP 585060, apical view (B1), oblique view of proximal edge and dorsal surface (B2), oblique view of distal edge and ventral surface (B3), view of distal edge (B4). C. Dextral sclerite, KUMIP 585061, dorsal (C1), apical (C2), and oblique dextral (C3) views. D. Dextral sclerite, KUMIP 585062, apical (D1), apical-dorsal (D2), ventral (D3), and lateral (D4) views. E. Large fragment from unknown sclerite type, KUMIP 585063. F. Sclerite of unknown chirality, KUMIP 585064, apical (F1) and lateral (F2) views. G. Sclerite fragment from unknown sclerite type, KUMIP 585065, detail showing distinctive pseudoplicae (G1), general view (G2). H. Sclerite of unknown chirality, KUMIP 585066, detail of apertural margin (H1), oblique views of the aperture (H2, H3). I. Fragment of unknown sclerite type showing pseudoplicae, KUMIP 585067. Scale bars 200 µm.

Fig. 2 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 2. Stratigraphic columns of the sampled sections in the Holyoake Range (HRA) and Churchill Mountains (CM2). Grain size: B, boundstone; G, grainstone; M, mudstone; P, packstone; W, wackestone.

Fig. 1. A in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 1. A. Topographic map of the Central Transantarctic Mountains (adapted from the USGS 2008) with the main geographic features and the sites visited by the Kansas University expeditions (study areas marked by section names GM, 87-L2, M, H, S). The locality GM is the type locality for Dailyatia braddocki, which is close to the location of the CM2 section. The locality M is the type locality of Dailyatia odyssei). B. The area of the Churchill Mountains visited by the Swedish-Australian expedition, showing the location of the CM2 section. C. The area of the Holyoake Range visited by the Swedish-Australian expedition, showing the location of the HRA section. D. Overview of Antarctica showing the extent of the Transantarctic Mountains, including the the location of the Argentina Range, and IC (location on sections unknown) in the Schneider Hills (sampled by the Kansas Expeditions).

Fig. 10. The tommotiid Kennardiidae indet. from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 10. The tommotiid Kennardiidae indet. from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Holyoake Range, Transantarctic Mountains, East Antarctica. A. Symmetrical first sclerite type, KUMIP 585077, apical view (A1), oblique view of posterior field (A2), lateral field (A3). B. Third sclerite type, KUMIP 585078, apical (B1) and lateral (B2) views. C. Third sclerite type, KUMIP 585079, apical view (C1), ventral side (C2), dorsal side (C3). D. Third sclerite type, KUMIP 585080, ventral side (D1), apical view (D2). E. Third sclerite type, KUMIP 233002, apical view (E1), detail of dorsal side (E2), detail of ventral side (E3), ventral side (E4). F. Third type of sclerite, KUMIP 585081, ventral side (F1), detail showing plicae on ventral surface (F2), distal edge (F3). G. Second type of sclerite, KUMIP 585082, apical view (G1), oblique view of posterior field (G2), lateral field (G3). H. Third type of sclerite, KUMIP 585083, posterior side (H1), distal edge (H2), apical view (H3). I. Third type of sclerite, KUMIP 585084, ventral side (I1), detail showing plicae on the ventral surface (I2). Scale bars 200 µm, except E2, E3, I2, 100 µm.

Fig. 7. The camenellan tommotiids from from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 7. The camenellan tommotiids from from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Transantarctic Mountains, East Antarctica. Dailyatia braddocki Evans and Rowell, 1990, Churchill Mountains (A, B), Dailyatia decobruta Betts in Betts et al., 2019, Holyoake Range (C–F), and Dailyatia cf. odyssei, Holyoake Range (G–I). A. C sclerite, NRM X10001, ventral view (A1), detail showing fold in the margin of the ventral field (A2). B. Sclerite of unknown chirality, NRM X10002, dorsal view (B1), detail showing apex (B2). C. Dextral C sclerite, KUMIP 585071, details showing micro-ornament on the anterior-lateral (C1) and the posterior (C3) fields, apical view (C2). D. Dextral C sclerite, KUMIP 585072, apical view (D1), view of proximal edge and dorsal field (D2). E. Sclerite of unknown chirality, KUMIP 585073, oblique view of ventral field (E1), view of apical area showing perforated apex (E2). F. Sclerite of unknown chirality, KUMIP 585074, dorsal (F1) and oblique apical (F2) views. G. Dextral C sclerite, NRM X10003, view of broken dorsal field (G1), detail showing fine growth series (G2), apex (G3), oblique basal view showing plicae at distal edge (G4). H. Sinistral C sclerite, NRM X10004, apical view (H1), oblique view of distal edge and part of ventral field (H2). I. Unknown sclerite type, NRM X10005, ventral view (I1), detail showing fine growth series (I2). Scale bars 200 µm, except E2, 50 µm.

Fig. 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 4. The camenellan tommotiid Dailyatia icari sp. nov. A sclerites from the lower Cambrian Schneider Hills limestone, Schneider Hills, Argentina Range, Antarctica. A. KUMIP 585054, view of anterior field (A1), enlarged view of the anterior apical area (A2), oblique view of the lateral field (A3), apical view with anterior to the top (A4). B. KUMIP 585055, anterior field of broken sclerite. C. KUMIP 585056 anterior field of broken sclerite. D. KUMIP 585057, view of anterior field (D1), apical view with anterior to the top (D2), lateral view (D3). E. KUMIP 585058, view of anterior field (E1), apical view with anterior to the top (E2). Scale bars 200 µm.

Fig. 3 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 3. Palaeobiogeographic maps of the distribution of Dailyatia and other camenellan tommotiids from East Gondwana (dark grey). New occurrences described in this paper in bold. Maps show the Cambrian (A) Terreneuvian Series to basal Series 2, Stage 3 (i.e., upper range of the Micrina etheridgei Zone for South Australia, Betts et al. 2016, 2017) and (B) Series 2 (from the base of the Dailyatia odyssei Zone for South Australia, Betts et al. 2016, 2017). Data for previous occurrences: 1 Laurie 1986; 2 Skovsted et al. 2015; 3 Betts et al. 2016; 4 Betts et al. 2017; 5 Betts et al. 2019; 6 Evans and Rowell 1990; 7 Wrona 2004. Abbreviations: CTM, Central Transantarctic Mountains; KGI, King George Island; AR, Argentina Range. Map adapted from Torsvik and Cocks (2013) and Yang et al. (2015).

Fig. 9. The camenellan tommotiid from the Cambrian Series 2, Stages 3, 4 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 9. The camenellan tommotiid from the Cambrian Series 2, Stages 3, 4, Shackleton Limestone, Transantarctic Mountains, East Antarctica. Dailyatia sp. 1, C sclerites and indeterminate fragments, Holyoake Range and Churchill Mountains (A–G) and Dailyatia braddocki Evans and Rowell, 1990, Churchill Mountains (H, I). A. Dextral C sclerite, NRM X10013, apical view (A1), dorsal field (A2), proximal edge (A4), distal edge (A3), ventral field ( A5), detail showing broken apex (A6). B. Dextral C sclerite, NRM X10014, oblique view of distal edge and dorsal field (B1), oblique view of proximal edge and ventral field (B2), and apical view (B3). C. Sinistral C sclerite, NRM X10015, apical view (C1), oblique view of proximal edge and dorsal →

Fig. 6 in Camenellan tommotiids from the Cambrian Series 2 of East Antarctica: Biostratigraphy, palaeobiogeography, and systematics

Fig. 6. The camenellan tommotiid Dailyatia icari sp. nov. C2 sclerites from the lower Cambrian Schneider Hills limestone, Schneider Hills, Argentina Range, East Antarctica. A. KUMIP 585068, apical (A1), oblique lateral (A2), ventral (A3), lateral (A4), and dorsal (A5) views, detail of pustulose ornament on the central surface of A1 (A6). B. KUMIP 585069, apical (B1), lateral (B2), and ventral (B3) views. C. KUMIP 585070, apical (C1), lateral-dorsal (C2), ventral (C3), lateral (C4), and dorsal (C5) views. Scale bars 200 µm, except A6, 100 µm.

opencc-by-4.0Jun 2024View details →

Central Italy Complete Daily Precipitation Series

The "Central Italy Complete Daily Precipitation Series" dataset provides a meticulously gap-filled daily precipitation record for 201 stations in Central Italy from 1951 to 2019. Using quantile mapping, spatial interpolation, machine learning, and multi-strategy merging techniques, the dataset ensures serial completeness and high accuracy. It incorporates data from neighboring stations and ERA5 estimates, validated through quality control measures such as Correlation Coefficient (CC), Root Mean Square Error (RMSE), Relative Bias, and Kling-Gupta Efficiency (KGE). This dataset is ideal for hydroclimatic modeling and projections. The dataset includes a CSV file with essential station information, such as station ID, latitude, longitude, elevation, and station name. The observed, estimated, and final Serially Complete Dataset are available in MAT format, with each column representing a time series of a station in the same order as in the CSV file. Additionally, the Nearby Info file provides the correlation coefficient (CC) and the distance between each target station and its assigned nearby stations, with each column corresponding to a target station in the same order as in the CSV file.

Figure 3 in Addressing biases in replacement series: the importance of reference density selection for interpretation of competition outcomes

Figure 3. Aboveground biomass (g m−2) across densities (plants m−2) for maize and Setorio foberi. Vertical arrows indicate the maize (black numbers) and S. foberi (gray numbers) densities at which S. foberi reaches inflection point and 90% of maximum biomass. Horizontal arrows indicate S. foberi biomass at inflection point and 90% of maximum biomass.

Figure 4 in Addressing biases in replacement series: the importance of reference density selection for interpretation of competition outcomes

Figure 4. Relative biomass of Amoronthus hybridus:maize replacement series from experiment 1 (left) and experiment 2 (right) with densities based in inflection point (A and B), maximum biomass (C and D), and equal N uptake (E and F). Black circles represent maize relative biomass,white circles represent A. hybridus relative biomass,and gray diamonds represent relative yield total biomass (RYT). Dotted line represents a relative biomass of 1 for all the proportions. The points and error bars represent data means and standard errors.

Figure 2 in Addressing biases in replacement series: the importance of reference density selection for interpretation of competition outcomes

Figure 2. Aboveground biomass (g m−2) across densities (plants m−2) for maize and Amoronthus hybridus. Vertical arrows indicate the maize (black numbers) and A. hybridus (gray numbers) densities at which A. hybridus reaches inflection point and 90% of maximum biomass. Horizontal arrows indicate A. hybridus biomass at the inflection point and 90% of maximum biomass.

Figure 1 in Addressing biases in replacement series: the importance of reference density selection for interpretation of competition outcomes

Figure 1. Theoretical relationship between relative biomass and plant density ratios of (A) two species of the same size and (B) two species with species 1 being larger than species 2. Dashed lines represent the regression lines for both species, and solid lines represent theoretical line of parity (1:1) between species.

Figure 5 in Addressing biases in replacement series: the importance of reference density selection for interpretation of competition outcomes

Figure 5. Relative biomass of Setorio foberi:maize replacement series from experiment 1 (left) and experiment 2 (right) with densities based in inflection point (A and B), maximum biomass (C and D), and equal N uptake (E and F). Black circles represent maize relative biomass, white circles represent S. foberi relative biomass, and gray diamonds represent relative yield total biomass (RYT). Dotted line represents a relative biomass of 1 for all the proportions. The points and error bars represent data means and standard errors.

opencc-by-4.0Jul 2024View details →

Uranium series data of phreatic overgrowth on speleothems and stalactites from Genovesa and Drac caves.

Open the record for dataset details and reuse information.

opencc-by-4.0Jul 2024View details →

Data from: Evaluating Window Size Effects on Univariate Time Series Forecasting with Machine Learning

In the realm of time series prediction modeling, the window size (w) is a critical hyperparameter that determines the number of time units included in each example provided to a learning model. This hyperparameter is crucial because it allows the learning model to recognize both long-term and short-term trends, as well as seasonal patterns, while reducing sensitivity to random noise. This study aims to elucidate the impact of window size on the performance of machine learning algorithms in univariate time series forecasting tasks. To achieve this, we employed 40 time series from two different domains, conducting experiments with varying window sizes using four types of machine learning algorithms: Bagging, Boosting, Stacking, and a Recurrent Neural Network (RNN) architecture. The results reveal that increasing the window size generally enhances the evaluation metric values up to a stabilization point, beyond which further increases do not significantly improve predictive accuracy. This stabilization effect was observed in both domains when w values exceeded 100 time steps. Moreover, the study found that RNN architectures do not consistently outperform ensemble models in various univariate time series forecasting scenarios.