Find research datasets worth reusing

opencc-by-4.0Jan 2023View details →

Global simulations of multi-frequency HF signal absorption for direct observation of middle atmosphere temperature and composition

The model used in the publication for Global simulations of multi-frequency HF signal absorption for direct observation of middle atmosphere temperature and composition   This paper presents the first numerical study on a new concept for the direct measurement of D-region absorption in the HF band. Numerical simulations based on the Appleton–Hartree and Garrett equations of refractive index are presented. Electron temperature as a result of HF radio pumping of the ionosphere is included in the calculations using proper numerical formulation. Both O- and X-mode radio wave polarizations are taken into consideration. A global map of HF absorption in the northern hemisphere is calculated. Detailed calculations of HF radio wave absorption as it propagates through the lower atmosphere are presented. The effect of several parameters on the amount of absorption is calculated. The best frequencies to be used for the purpose of this study are discussed. A machine learning model is developed and the capability of the model in estimation of D and E-region constituents includes $N_2$, $O$, $O_2$, as well as $T$ and $N_e$ is examined. Such a technique can also lead to global mapping of HF absorption and improve OTHR (over-the-horizon-radar) performance.

dryad28/100

Improving results from touch DNA evidence with optimized direct PCR methods

Improved methods to generate high-quality DNA profiles from touch DNA samples are of considerable interest to forensic DNA laboratories. Direct polymerase chain reaction (PCR) amplification, a sample processing method in which samples are added directly to amplification reactions without prior purification or quantification, has been identified as a method that may improve the generation of genotyping data from such samples; however, laboratories in the United States are required to use standard DNA processing methods to process low-level sample types. In part, this is due to FBI Quality Assurance Standard (QAS) 9.4, which requires all unknown forensic samples to undergo human-specific DNA quantification prior to amplification of short tandem repeat (STR) loci. The goal of this 3-year study was to generate data in support of a reevaluation of QAS 9.4. In two phases, this study examined the following: direct PCR-compatible collection methods in conjunction with mock touch DNA evidence samples on a variety of substrates (Phase I), direct PCR of touch DNA samples that were stored at room temperature for up to six months after collection with the optimum methods identified in Phase I, and direct PCR of touch DNA samples that were re-sampled after initial processing. Nine collection methods and various substrates were examined in Phase I, and three time points were examined in Phase II. In both phases, two processing methods were used: standard processing samples were extracted, quantified, and amplified in accordance with the QAS; and direct PCR samples were directly amplified. All STR profiles were assessed for overall profile quality. This project was supported by Award No. 2019-DU-BX-0009, awarded by the National Institute of Justice, Office of Justice Programs, U.S. Department of Justice. The opinions, findings, and conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect those of the Department of Justice.

opencc-zeroDec 2022View details →

dryad28/100

Tree identity and diversity directly affect soil moisture and temperature but not soil carbon ten years after planting

1. Soil C is the largest C pool in forest ecosystems that contributes to C sequestration and mitigates climate change. Tree diversity enhances forest productivity, so diversifying the tree species composition, notably in managed forests, could increase the quantity of organic matter being transferred to soils, and alter other soil properties relevant to the C cycle. 2. A ten-year-old tree diversity experiment was used to study the effects of tree identity and diversity (functional and taxonomic) on soils. Surface (0-10 cm) mineral soil was repeatedly measured for soil C concentration, C:N ratio, pH, moisture and temperature in twenty-four tree species mixtures and twelve corresponding monocultures (replicated in four blocks). 3. Soil pH, moisture and temperature responded to tree diversity and identity. Greater productivity in above- and below-ground tree components did not increase soil C concentration. Soil pH increased and soil moisture decreased with functional diversity, more specifically, when species had different growth strategies and shade tolerances. Functional identity affected soil moisture and temperature, such that tree communities with more slow-growing and shade-tolerant species had greater soil moisture and temperature. Higher temperature was measured in communities with broadleaf-deciduous species compared to communities with coniferous-evergreen species. 4. We conclude that long-term soil C cycling in forest plantations will likely respond to changes in soil pH, moisture and temperature that is mediated by tree species composition, since tree species affect these soil properties through their litter quality, water uptake and physical control of soil microclimates.

opencc-zeroJan 2023View details →

opencc-by-4.0Sep 2022View details →

Directional aspects of vegetation linear and circular polarization biosignatures.

This contains the experimental data collected by the authors for the article "Directional aspects of vegetation linear and circular polarization biosignatures", published in Astrobiology volume 22 issue 9 on September 5, 2022 (https://doi.org/10.1089/ast.2021.0156). A preprint of the article is freely available on ArXiv: https://arxiv.org/abs/2207.08125 (https://doi.org/10.48550/arXiv.2207.08125). The article provides the methodology for the experimental aquisitions, discussion of the errors and uncertainties, analysis of the spectra and their implications. The file is in csv format and the content of each column is indicated in the first line (header).

openMar 2023View details →

Monterey Bay, Monterey Peninsula, and Santa Cruz Directional Spectra

Directional spectra estimated from SOFAR Ocean Spotter buoy and Nortek Signature 1000 acoustic doppler current profilers.  Data used in the manuscript "Shoreline and Bottom-Influenced Sea-Swell Wave Reflection Across Sandy and Rocky Shores" by Collins, MacMahan, Thornton, Benbow and Jessen. Code used to generate the directional spectra from the Nortek Signature 1000 ADCP is available at: https://github.com/patrick-aus/Bayesian-Directional-Tilted-ADCP

opennotspecifiedMar 2023View details →

Figure 17 in Fossil diversity in 'dawn' hexapods (Diplura: Projapygoidea), with direct evidence for being chemically predaceous in the Cretaceous

Figure 17. Scanning electron micrographs of the secretion. A, tangled mass. B, amorphous mass.

opencc-zeroJul 2023View details →

Supplementary material 1 from: Röder N, Schwenk K (2023) Direct PCR meets high-throughput sequencing – metabarcoding of chironomid communities without DNA extraction. Metabarcoding and Metagenomics 7: e102455. https://doi.org/10.3897/mbmg.7.102455

Overview of chironomid size classes

opencc-zeroJul 2023View details →

Supplementary material 2 from: Röder N, Schwenk K (2023) Direct PCR meets high-throughput sequencing – metabarcoding of chironomid communities without DNA extraction. Metabarcoding and Metagenomics 7: e102455. https://doi.org/10.3897/mbmg.7.102455

Composition of the two artificial chironomid communities

opennotspecifiedMay 2020View details →

Fig. 6 in Site-directed mutagenesis of β sesquiphellandrene synthase enhances enzyme promiscuity

Fig. 6. Hydroxylated sesquiterpene product of PmSTS mutants L454G and L454A.

opencc-by-4.0Aug 2023View details →

Information theory-based direct causality measure to assess cardiac fibrillation dynamics

This repository contains the optical imaging data used in the article "Information theory-based direct causality measure to assess cardiac fibrillation dynamics"

opencc-by-4.0Aug 2023View details →

Data from: Direct contribution of invertebrate holobionts to methane release from coastal sediments

In this study, we incubated 103 animals specimens equivalent to 19 macrofaunal species to quantify holobiont-associated methane (CH4) fluxes and metabolic processes [oxygen (O2) - respiration and ammonium (NH4+) - excretion rates]. The specific goals were to quantify holobionts CH4 production/uptake and to establish correlations between CH4 fluxes and environmental factors (e.g., salinity). Invertebrates were collected in 4 coastal systems and incubated in 22 mL glass microcosms filled with 0.22 µm twice-filtered in situ water. Individual and Mass-standardized CH4 Production Rates (IPR and MPR, respectively), O2 Respiration Rates (IRR and MRR) and  NH4+ Excretion Rates (IER and MER) were measured in 103 animals’ incubations. 1. IRR were calculated from linear regression analysis of the solute (O2) versus time equation:         $IRR=(Reg.Slope × V)/N$        where IRR (µmol O2 ind.−1 day−1) is the respiration of the chemical species O2; Reg.Slope is the slope of the regression (µmol O2 L−1 day−1); V (L) is the water volume in the glass microcosm; N is the number of incubated animals per microcosm. 2. IER and IPR were calculated from the difference in concentrations (NH4+ and CH4) in the water using the equation:         $IER and IPR = ((C_f-C_i )×V)/(N×t)$         where IER and IPR (µmol ind.−1 day−1 and nmol ind.−1 day−1) are the excretion or production of the chemical species (NH4+ or CH4); Cf and Ci (µmol or nmol L−1) are the final and initial concentrations of the chemical species; V (L) is the water volume in the glass microcosm; N is the number of incubated animals per microcosm; and t (days) is the incubation time. Positive values represent productions while negative values represent uptake. Same equations were used to calculated mass-standardized rates, but instead of N the total animal biomass (gdw) was used. Animals’ biomass was determined as dry weight (DW) or as dry weight shell free (DWSF) for bivalves, after the desiccation at 70°C until constant mass. Water temperature and salinity were measured in situ with a multiple probe (556 MPS, YSI).  Rates are reported as average ± standard error.

Impact of Active Choice on Advance Directive Completion Rates

ClinicalTrials.gov study NCT02289105. IPD Sharing: Not stated. Countries: 1. Publications: 0.

Routine Application of Point-of-care PCR Test to Identify and Direct Therapy for Acute Respiratory Infection in the Emergency Department Trial

ClinicalTrials.gov study NCT06780566. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.

Suprainguinal Fascia Iliaca Compartment Block in Direct Anterior Approach to Total Hip Arthroplasty

ClinicalTrials.gov study NCT05237479. IPD Sharing: NO. Countries: 0. Publications: 20.

Directed Topical Drug Delivery for Treatment for PASC Hyposmia

ClinicalTrials.gov study NCT05970731. IPD Sharing: NO. Countries: 1. Publications: 0.

Impact of Renal Function Availability to Community Pharmacist for Dispensing Direct Oral Anticoagulant in Ambulatory Patients on Bleeding Occurrence

ClinicalTrials.gov study NCT06739603. IPD Sharing: UNDECIDED. Countries: 0. Publications: 0.

Direct Peritoneal Resuscitation in Gastroschisis

ClinicalTrials.gov study NCT03205553. IPD Sharing: NO. Countries: 1. Publications: 0.

Clinical Investigation of the F-Composite 2 System in Direct Filling Therapy

ClinicalTrials.gov study NCT03221660. IPD Sharing: Not stated. Countries: 1. Publications: 0.

Comparative Study Between Biodentine and Mineral Trioxide Aggregate in Direct Pulp Capping

ClinicalTrials.gov study NCT02803528. IPD Sharing: NO. Countries: 1. Publications: 5.

Transcutaneous Laryngeal Ultrasound as an Alternative to Direct Flexible Laryngoscopy in Assessment of Vocal Cords

ClinicalTrials.gov study NCT06161467. IPD Sharing: Not stated. Countries: 0. Publications: 2.