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5,573 results for “optimality”
Dataset related to "High-frequency optimally windowed chirp rheometry for rapidly evolving viscoelastic materials: Application to a crosslinking thermoset"
<p>Knowledge of the evolution in the mechanical properties of a curing polymer matrix is of great importance in composite parts or structure<br>fabrication. Conventional rheometry, based on small amplitude oscillatory shear, is limited by long interrogation times. In rapidly evolving<br>materials, time sweeps can provide a meaningful measurement albeit at a single frequency. To overcome this constraint, we utilize a combined<br>frequency- and amplitude-modulated chirped strain waveform in conjunction with a homemade sliding plate piezo-operated rheometer (PZR)<br>and a dual-head commercial rotational rheometer (Anton Paar MCR 702) to probe the linear viscoelasticity of these time-evolving materials.<br>The direct controllability of the PZR, resulting from the absence of any kind of firmware and the microsecond actuator-sensor response<br>renders this device ideal for exploring the advantages of this technique. The high frequency capability allows us to extend the upper limits of<br>the accessible linear viscoelastic spectrum and, most importantly, to shorten the length of the interrogating strain signal (OWCh-PZR) to subsecond<br>scales, while retaining a high time-bandwidth product. This short duration ensures that the mutation number (NMu) is kept sufficiently<br>low, even in fast-curing resins. The method is validated via calibration tests in both instruments, and the corresponding limitations are discussed.<br>As a proof of concept, the technique is applied to a curing vinylester resin. The linear viscoelastic (LVE) spectrum is assessed every<br>20 s to monitor the rapid evolution in the time and frequency dependence of the complex modulus. Comparison of the chirp implementation,<br>based on parameters such as duration of the experiment, sampling frequency, and frequency range, in a commercial rotational rheometer with<br>the PZR provides further information on the applicability of this technique and its limitations. Finally, FTIR spectroscopy is utilized to gain<br>insights into the evolution of the chemical network, and the gap dependence of the evolving material properties in these heterogeneous<br>systems is also investigated</p>
Data and code from: Birds optimize fruit size consumed near their geographic range limits
<p>This dataset is <a href="https://doi.org/10.5061/dryad.931zcrjs5">available from Dryad</a>. </p>
Optimizing protein quality: synergies and comparisons of single and combined alternative proteins from diverse sources
<p>This dataset includes (1) the AAS of alternative protein ingredients, calculated with the references set by PDCAAS and DIAAS (adult age group); (2) the AAS of the limiting AA for combinations made with these protein ingredients (AAS calculated based on PDCAAS reference); and (3) the AAS of the limiting AA for combinations made with these protein ingredients (AAS calculated based on DIAAS reference)</p>
Optimal low thrust transfers among asteroid belt asteroids.
<p>This dataset contains > 3,000,000 optimal low-thrust transfers between asteroids in the belt. It was created from the asteroids data released during the 12th edition of the Global Trajectory optimization competitions (see the <a href="https://sophia.estec.esa.int/gtoc_portal/">official GTOC portal</a>) and considering a spacecraft having an initial mass <strong>ms</strong> in the range [700, 8000] kg, a maximum thrust <strong>TM</strong> = 0.6 N with a specific impule <strong>Isp</strong> = 4000 s, resulting in possible initial acceleration levels in the range [7.5 1e-5, 8.6 1e-4] m/s^2.</p> <p>The dataset was developed in the context of our contribution to the International Symposium on Space Flight Dynamics 2024 (ISSFD).</p> <p>Starting from a sampled asteroid couple <strong>(As</strong> <strong>Af)</strong>, and an initial mass <strong>ms:</strong></p> <ul> <li>The minimum time transfer <strong>tof_min </strong>is found solving the corresponding optimal control problem (in a Keplerian dynamics) and the resulting transfer recorded in a first dataset.</li> <li>In some cases, for several fixed <strong>tof</strong> > <strong>tof_min</strong> the maximum final mass transfer is found solving the corresponding optimal control problem and the resulting transfer recorded in a second dataset.</li> </ul> <p>Each line in the csv dataset correspond to a specific optimal transfer (randevouz) and contains the following information:</p> <p>[<strong>xs</strong>, <strong>ys</strong>, <strong>zs</strong>, <strong>vxs</strong>, <strong>vys</strong>, <strong>vzs</strong>, <strong>xf</strong>, <strong>yf</strong>, <strong>zf</strong>, <strong>vxf</strong>, <strong>vyf</strong>, <strong>vzf</strong>, <strong>ms</strong>, <strong>tof</strong>, <strong>mf</strong>, <strong>MIMA</strong>, <strong>MIMA2</strong>, <strong>MIMA3</strong>, <strong>mfms_approx</strong>]</p> <p>, i.e. the starting (<strong>s</strong>) spacecarft state, the final (<strong>f</strong>) spacecraft state, the starting spacecraft mass <strong>ms</strong>, the time of flight <strong>tof </strong>and the final mass <strong>mf</strong>. Several analytical approximations are also reported: <strong>MIMA</strong>, <strong>MIMA2,</strong> <strong>MIMA3, mfms_approx.</strong></p> <p>The analytical approximation <strong>MIMA</strong> is derived and published in:</p> <ul> <li>Hennes, D., Izzo, D., & Landau, D. (2016, December). Fast approximators for optimal low-thrust hops between main belt asteroids. In <em>2016 IEEE Symposium Series on Computational Intelligence (SSCI)</em> (pp. 1-7). IEEE.</li> </ul> <p>A second improved version (<strong>MIMA2</strong>) is derived and published in:</p> <ul> <li>Izzo, D., Märtens, M., L. Beauregard ..., G. Acciarini et al. "Asteroid Mining: ACT&Friends’ Results for the GTOC 12 Problem." <em>to appear in Astrodynamics (Springer).</em></li> </ul> <p>and the final one, <strong>MIMA3,</strong> is derived and published in:</p> <ul> <li>G. Acciarini, Beauregard L. and Izzo, D., Computing low-thrust transfers in the asteroid belt, a comparison between astrodynamical manipulations and a machine learning approach. <em>ISSFD conference, Darmstadt, 2024</em>.</li> </ul> <p>The MIMAs approximate the maximum initial mass a spacecarft can have to perform a given fixed time transfer (that also is, in the optimal time of flight transfer dataset <strong>ms</strong>). For these transfers no coast arc exists. In all other cases, a related analytical approach can be used to approximate <strong>mf</strong>. The result, when available is added to the dataset as <strong>mfms_approx </strong>(approximating the ratio <strong>mf/ms</strong>, an approximation for the final mass can be retreived multiplying by <strong>ms</strong>)</p> <p> </p> <p>NOTE: the <strong>MIMAs</strong> and <strong>mfms_approx </strong>sometimes fail numerically or conceptually in which case a nan is reported or a 'nonsensical' number (e.g. lower than the actual starting mass).</p> <p>NOTE: The second version of the dataset corrects some trajectories in the time-optimal dataset that were not time optimal since during the optimization they hit a lower bound on the mass (500kg). They have now been removed. Thanks to Hongxin Shen for testing and reporting the issue.</p> <p> </p>
DIN: A Decentralized Inexact Newton Algorithm for Consensus Optimization: SW and Data
<p>This upload contains the main simulation code and related datasets used in the conference paper entitled <a href="https://ieeexplore.ieee.org/document/10278721" target="_blank" rel="nofollow noreferrer noopener">DIN: A Decentralized Inexact Newton Algorithm for Consensus Optimization</a>, which was presented at <a href="https://icc2023.ieee-icc.org/" target="_blank" rel="nofollow noreferrer noopener">IEEE ICC 2023</a>.</p>
Dataset for the Julia code titled "Image Similarity Detection using ORB & Julia : Leveraging Hamming Distance & Keypoint Optimization"
<p>The above Dataset contains</p> <p>1) Real PCB Pics</p> <p>2) Real Car Fusebox pics</p> <p>3) Real & Filtered Human face pics</p> <p>4) Readme file</p> <p>The above Dataset is designed to be used for the Julia Code titled "Image Similarity Detection using ORB & Julia : Leveraging Hamming Distance & Keypoint Optimization". The Code should be run on either similar PCB pics or Car Fusebox pics or Human Face Pics(Vikrant or Mat or Paris). Proper Choice of Hamming Distance & the number of Keypoints is necessary to achieve the desired number of similar images. </p>
Data from: Linking in vivo muscle dynamics to in situ force-length and force-velocity reveals that guinea fowl lateral gastrocnemius operates at shorter than optimal lengths
<p>Force-length (F-L) and force-velocity (F-V) properties characterize skeletal muscle's intrinsic properties under controlled conditions, and it is thought that these properties can inform and predict <em>in vivo</em> muscle function. Here, we map dynamic <em>in vivo</em> operating range and mechanical function during walking and running, to the measured <em>in situ</em> F-L and F-V characteristics of guinea fowl (<em>Numida meleagris</em>) lateral gastrocnemius (LG), a primary ankle extensor. We use <em>in vivo</em> patterns of muscle (tendon) force, fascicle length, and activation to test the hypothesis that muscle fascicles operate at optimal lengths and velocities to maximize force or power production during walking and running. Our findings only partly support our hypothesis: <em>in vivo</em> LG velocities are consistent with optimizing power during work production, and economy of force at higher loads. However, LG does not operate at lengths on the force plateau (±5% Fmax) during force production. LG length was near L<sub>0</sub> at the time of EMG onset but shortened rapidly such that force development during stance occurred almost entirely on the ascending limb of the F-L curve, at shorter than optimal lengths. These data suggest that muscle fascicles shorten across optimal lengths in late swing, to optimize the potential for rapid force development near the swing-stance transition. This may provide resistance against unexpected perturbations that require rapid force development at foot contact. We also found evidence of passive force rise (in absence of EMG activity) in late swing, at lengths where passive force is zero <em>in situ</em>, suggesting that history dependent and viscoelastic effects may contribute to <em>in vivo</em> force development. Direct comparison of<em> in vivo </em>work loops and physiological operating ranges to traditional measures of F-L and F-V properties suggests the need for new approaches to characterize dynamic muscle properties in controlled conditions that more closely resemble <em>in vivo </em>dynamics.</p>
Mixed Precision Optimization Method acceleration time and numerical simulation results
<p>The stored data are the speedup ratios of the MPFlow method and other acceleration algorithms, as well as the elastic wave response data obtained by numerical simulation using the MPFlow method.</p>
Figure 1 in Application of the NucliSENS easyMAG system for nucleic acid extraction: optimization of DNA extraction for molecular diagnosis of parasitic and fungal diseases
Figure 1. Study design.
Supplemental Data for "Adaptive Container Service: a New Paradigm for Robust and Optimized Bioinformatics Workflow Deployment in the Cloud."
<p>All supplemental data for "Adaptive Container Service: a New Paradigm for Robust and Optimized Bioinformatics Workflow Deployment in the Cloud."<br><br>Abstract:<br>We propose Adaptive Container Service (ACS), a new paradigm for deploying bioinformatics workflows in cloud computing environments. By encapsulating the entire workflow within a single virtual container, combined with automatic workflow checkpointing and dynamic migration to appropriately scaled containers, ACS-based deployment demonstrates several key advantages over alternative strategies: it enables optimal resource provision to any workflow that comprise of multiple applications with diverse computing needs; it provides protection against application-agnostic out-of-memory (OOM) errors or spot instance interruptions; and it reduces efforts required for workflow development, optimization, and management because it runs workflows with minimal or no code modifications. Proof-of-concept experiments show that ACS avoided both under- and over-provisioning in monolithic single-container deployment. Despite being deployed as a single container, it achieved comparable resource utilization efficiency as optimized Nextflow-managed, multi-modular workflows. Analysis of over 18,000 workflow runs demonstrated that ACS can effectively reduce workflow failures by two-thirds. These findings suggest that ACS frees developers from navigating the complexity of deploying robust workflows and rightsizing compute resources in the cloud, leading to significant reduction in workflow development time and savings in cloud computing costs.<br><br>Contains the following directories:<br>Fig2-bbtools: running metrics for BBTools<br>Fig3-rna-seq: running metrics for RNA-Seq<br>Fig4-Job_records: meta data and running metrics of 18,000+ jobs</p>
Optimizing the detection of biological signals through a semi-automated feature selection tool
<p>This repository contains the .xml files generated by the MZmine (Schmid et al., 2023) software version 2.53 during the preprocessing of the raw data (.raw) according to the recommendations of the 2007 Metabolomics Standards Initiative (Summer et al., 2007).</p> <p> </p> <p>Schmid R et al. Integrative analysis of multimodal mass spectrometry data in MZmine 3. Nat Biotechnol. 2023 Apr;41(4):447-449.</p> <p>Sumner et al. Proposed minimum reporting standards for chemical analysis Chemical Analysis Working Group (CAWG) Metabolomics Standards Initiative (MSI). Metabolomics. 2007 Sep;3(3):211-221. </p>
"Power system investment optimization to identify carbon neutrality scenarios for Italy", scripts and data
<p>Script and data to reproduce the main results of "Power system investment optimization to identify carbon neutrality scenarios for Italy"</p>
Applicability of new sustainable and efficient alginate-based composites for critical raw materials recovery: General composites fabrication optimization and adsorption performance evaluation
<p>This dataset contains the raw data for the publication "Applicability of new sustainable and efficient alginate-based composites for critical raw materials recovery: General composites fabrication optimization and adsorption performance evaluation" by Fila et al, published in Chemical Engineering Journal. The upload includes raw data of physicochemical characterizations of calcium alginate and its composites, i.e. alginate-biochar and alginate-clinoptilolite, including BET, SEM, TG, XPS and XRD analyses. </p>
Fig.1 in Protocol Optimization For Genomic Dna Extraction And Rapd-Pcr Of Alien Ponto-Caspian Amphipod Pontogammarus Robustoides
Fig.1. Localities of sampling sities in the Latvian reservoirs.
Fig. 4. Optimized pond for B in Action Plan For The Fire-Bellied Toad Bombina Bombina In Latvia: Assessment Of The Implementation For Ten Years, Releasing From Aquaculture And Restoration Of Habitats In 2006-2016
Fig. 4. Optimized pond for B.bombina population in Katriniski.
dataset of prompts for development of the optimization guiding framework if-act
Open the record for dataset details and reuse information.
Modeling and simulation of a new Urban Lightweight Electric Vehicle concept based on the optimized use of renewable energies and the reduction of CO2 emissions
<p>This work has produced a series of scientifc contributions. This library develops different mathematical expressions and assumptions for the dynamic modelling of an smart-grid located within a solar-powered ULEV are derived. The code was developed using Dymola</p>
Metrics EOD optimization
<p>Excel file with the results of the optimization of the Earth Observation Data (EOD) Processing and Distribution pilot case using the ENTICE middleware. The EOD pilot consists of four virtual machines: process4EO, monitor4EO, archive4EO, user4EO. The metrics used to measure the optimization of each virtual machine are the sizes, creation times, delivery times, deployment time. Finally, the percentaje reductions were calculated.</p>
Figure 2. Flow chart of the CoDOA (Kose & Arslan, 2015).0Cognitive Development Optimization Algorithm Based Support Vector Machines for Determining Diabetes
<p>The related algorithm steps can be visualized with a flow chart as shown in Figure 2 [26].</p>
USP5 Zf-UBD Fluorescence Polarization Displacement Assay Optimization
<p>Optimization of a fluorescence polarization (FP) assay for USP5 zinc finger ubiquitin binding domain (Zf-UBD) with an N-terminal FITC-labeled ubiquitin RLRGG peptide. </p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.