1,253,259 Hits in 4.8 sec

Seismic Performance of F3D Free-Form Structures Using Small-Scale Shaking Table Tests

Min Jae Park, Gain Cheon, Robel Wondimu Alemayehu, Young K. Ju
2022 Materials  
Therefore, in this study, we tested a free-form structure constructed by F3D printing using small-scale models that satisfy the similitude law with shaking tables.  ...  However, not many studies have evaluated the structural performance of free-form concrete structures using free-form formwork 3D printer (F3D) technology, a 3D printing technology.  ...  Concept of free-form structure. Figure 3 . 3 Figure 3. Manufacturing process of free-form concrete structure with EPS foam molds. Figure 2 . 2 Figure 2. Concept of free-form structure.  ... 
doi:10.3390/ma15082868 pmid:35454561 pmcid:PMC9029542 fatcat:grb6l364qneuze54i5fsadjtam

The Spatial Distribution of the Galactic First Stars. II. Smoothed Particle Hydrodynamics Approach

Chris B. Brook, Daisuke Kawata, Evan Scannapieco, Hugo Martel, Brad K. Gibson
2007 Astrophysical Journal  
According to our models, these trends are not sensitive to the merger histories of the disk galaxies or the implementation of supernova feedback.  ...  We find that metal-free stars continue to form until z~4 in halos that are chemically isolated and located far away from the biggest progenitor of the final system.  ...  history of metal-free stars.  ... 
doi:10.1086/511514 fatcat:gwarai3zmjhnflv4vixoyag3am

The evolution of the spiral galaxy M51a

Xiaoyu Kang, Fenghui Zhang, Ruixiang Chang
2015 Proceedings of the International Astronomical Union  
A simple model for M51a is constructed to explore its evolutionary history by assuming its disk grows from continuous gas infall, which is shaped by a free parameter-the infall-peak time t p.  ...  By adopting a constant infall-peak time t p = 7.0Gyr, our model predictions can reproduce most of the observed constraints and still show that the disk of M51a forms inside-out.  ...  By comparing the model predictions with the observed data, we can discuss the probable ranges for free parameters in the model and then know more about the main properties of the evolution and SF history  ... 
doi:10.1017/s1743921315009916 fatcat:lbblzw2zgbfhfapb7a6qj7e4ee

Rebounding Cores to Build Star Cluster Multiple Populations [article]

G. Parmentier, A. Pasquali
2021 arXiv   pre-print
Clumps for which failed cores are the dominant core type experience star formation histories with peaks and troughs.  ...  We identify three main parameters shaping the star formation history of a clump: the star and core formation efficiencies per free-fall time, and the time-scale on which failed cores return to the clump  ...  Our model is able to generate very diverse star formation histories, from a star formation rate steadily decreasing with time to 'jagged' star formation histories.  ... 
arXiv:2110.14470v1 fatcat:j6ornods2zg3jcvqx6za2gtvee

Theoretical Model of Polymer Network Chain Formation under Strain

Yong Yu, Shunping Yan, Ye Fang, Qinshu He, Huyi Wang, Yong Qiu, Qiang Wan
2018 ACS Omega  
In our model, the free energy change for a chain formation is associated with the reaction sequences, except network chain cross-linking or cross-link scission reactions under the same strain stage.  ...  model.  ...  We express our gratitude to the reviewers for helpful criticism and important comments with respect to the manuscript.  ... 
doi:10.1021/acsomega.8b01748 pmid:31458218 pmcid:PMC6643838 fatcat:dgznuwxozrfz5k2bjxkne35cau

Combining Structured and Free-text Electronic Medical Record Data for Real-time Clinical Decision Support

Emilia Apostolova, Tony Wang, Tim Tschampel, Ioannis Koutroulis, Tom Velez
2019 Proceedings of the 18th BioNLP Workshop and Shared Task  
the prediction model results.  ...  We present a deep learning approach to combining in real time available diagnosis codes (ICD codes) and free-text notes: Patient Context Vectors.  ...  Results show that Patient Context Vectors can be easily combined with structured data in the form of vital signs an lab results and improve significantly the prediction model results.  ... 
doi:10.18653/v1/w19-5007 dblp:conf/bionlp/ApostolovaWTKV19 fatcat:ylphmzzhajffljd2w72wpctydu

Free energy and states of fractional-order hereditariness

Luca Deseri, Mario Di Paola, Massimiliano Zingales
2014 International Journal of Solids and Structures  
As a consequence the material free energy cannot be defined in a unique manner yielding a significative lack of knowledge of the maximum recoverable work that can extracted from the material.  ...  The non-uniqueness of the free energy function is removed in the paper for power-laws relaxation/creep function by using a recently proposed mechanical analogue to fractional-order hereditariness.  ...  form of the strain histories with measure provided by the relaxation function GðtÞ.  ... 
doi:10.1016/j.ijsolstr.2014.05.008 fatcat:vah7mxmo6bfojeiw7iqpre4je4

Modelling the effects of unsteady flow phenomena on flapping flight dynamics—stability and control [chapter]

G.K. Taylor
2006 Flow Phenomena in Nature Volume 1  
Flight dynamics modelling is complicated by the interaction of the vehicle's solid body dynamics with the fluid dynamics of the surrounding air.  ...  Unsteady aerodynamic effects dominate the complex flows associated with flapping flight, and a key challenge in flapping flight dynamics modelling will therefore be to account adequately for the effects  ...  It follows that the most difficult kinds of unsteady flow phenomena to incorporate in flight dynamics models are those forming non-autonomous inputs to the system, because the motion history with respect  ... 
doi:10.2495/1-84564-001-2/2e fatcat:ziy5thbm5veo7gcq4fge4yoojy

The maximum contribution to reionization from metal-free stars [article]

Jose M. Rozas, Jordi Miralda-Escude, Eduard Salvador-Sole
2005 arXiv   pre-print
We estimate the maximum contribution to reionization from the first generation of massive stars, with zero metallicity, under the assumption that one of these stars forms with a fixed mass in every collapsed  ...  We assume that any halo that has already had stars previously formed in one of their halo progenitors will form only stars with metals, which are assigned an emissivity of ionizing radiation equal to that  ...  In practice, atomic cooling can be neglected because metal-free stars form very rarely in halos with virial temperature above ∼ 8000 K in our model.  ... 
arXiv:astro-ph/0511489v1 fatcat:rkxo742cevealdp6t6ajv4dt6a

Comparative Analysis of Flat Slab with or without Perimeter Beam under Earthquake Load by Time History Analysis

Abhilash Jain
2020 International Journal for Research in Applied Science and Engineering Technology  
The time history curve show that peak acceleration will be decreases in model 2 and the effect is vary with variation in time period.  ...  Flat slab structures with drop panels and without perimeter beams, Flat slab structures with drop panels and with perimeter beams uses fast non-linear time history analysis method.  ...  Table 6 shows the Base shear for time history function maximum and minimum value. Fig. 1 : 1 Grid (b) 3-Dimensional Model Fig 4: Model 2: Flat Slab with Drop & With Perimeter Beam A.  ... 
doi:10.22214/ijraset.2020.31888 fatcat:ignv5r2cibcrxa4cjub3s3b7k4

Formation of star clusters: Models and simulations

Philip C. Myers
2015 Proceedings of the International Astronomical Union  
Recently observed core-filament systems with sonic line widths and parsec lengths present challenges for turbulent models.  ...  Recent models and simulations describe the core mass function, the protostar mass function, and the star-formation rate.  ...  Birth history. Each simulation shows a continuous history of protostar births, at a mean rate ∼ 100 births per free-fall time.  ... 
doi:10.1017/s1743921316007390 fatcat:b55wfd24m5eqjhav56gfzshoeq

Comparison of artificial neural network and binary logistic regression for determination of impaired glucose tolerance/diabetes

A Kazemnejad, Z Batvandi, J Faradmal
2010 Eastern Mediterranean Health Journal  
Models based on an artificial neural network (the multilayer perceptron) and binary logistic regression were compared in their ability to differentiate between disease-free subjects and those with impaired  ...  There was no performance difference between models based on logistic regression and an artificial neural network for differentiating impaired glucose tolerance/diabetes patients from disease-free patients  ...  Table 1 shows that the IGT and particularly the DM groups had a higher proportion of subjects with a positive history of hyperlipidaemia compared with the disease-free group (36.4%, 51.0% and 22.3% for  ... 
pmid:20799588 fatcat:s22y67l435aypgkqwmunhaanhq

Study on the influence of the seafloor soft soil layer on seismic ground motion

Jingyan Lan, Juan Liu, Xing Song
2021 Natural Hazards and Earth System Sciences  
In this paper, four sets of typical free-field models are constructed and established, comprising a land model, land model with surface soft soil, sea model and sea model with surface soft soil.  ...  The dynamic finite-difference method is used to carry out two-dimensional seismic response analysis of a typical free field based on the input forms of P and SV waves.  ...  Figure 1 . 1 Four typical free-field models. Figure 2 . 2 Acceleration time history curve of seismic waves.  ... 
doi:10.5194/nhess-21-577-2021 fatcat:fkjv72bsijgyzkbjrjea4u4e4m

Page 219 of SPE Reservoir Evaluation & Engineering Vol. 9, Issue 3 [page]

2006 SPE Reservoir Evaluation & Engineering  
This set forms the history-matching wavelet coefficients that correspond to produc- tion-data information.  ...  To start with, the Haar wavelet transformation is performed on the history-matched model, and the problem is mapped to the wavelet domain.  ... 

Prediction of the shape of inline wave force and free surface elevation using First Order Reliability Method (FORM)

Amin Ghadirian, Henrik Bredmose, Signe Schløer
2017 Energy Procedia  
The application is validated against the NewWave model and also the NewForce model, which is introduced as the force equivalent of NewWave theory, that is, the most likely time history of inline force  ...  The application is validated against the NewWave model and also the NewForce model, which is introduced as the force equivalent of NewWave theory, that is, the most likely time history of inline force  ...  It is expected that with a more nonlinear model a better agreement between the FORM results and the measurements is possible.  ... 
doi:10.1016/j.egypro.2017.10.343 fatcat:yjm5wnyclfd3nifjaxl25pjp4y
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