Results 31 to 40 of about 1,371,086 (345)

Optimization of biochar preparation process and carbon sequestration effect of pruned wolfberry branches

open access: yesGreen Processing and Synthesis, 2022
Pruned wolfberry branches are abundant and ideal raw material for biomass carbonization. It would provide valuable guidance for optimizing the preparation conditions of biochar of pruned wolfberry branches for carbon sequestration and emission reduction.
Yu Jiawen, Song Mingdan, Li Zhengpeng
doaj   +1 more source

Fixed-effects panel regression model.

open access: yes, 2023
Several automated aesthetic assessment models were developed to assist artists in producing artwork with high aesthetic appeal. However, most of them focused on static visual art, such as photographs and paintings, and evaluations of dynamic art received
Liqun Zhang (115900)   +3 more
core   +1 more source

Fitting of fixed regression curves with different residual variance structures for Nellore cattle growth modeling

open access: yesSemina: Ciências Agrárias, 2020
Different polynomial functions were tested for mean trajectory modeling with different residual variance structures. A total of 15,148 weight records of 3,115 Nellore Mocho cattle with ages between 1 and 660 days, raised in northern Brazil.
Diego Helcias Cavalcante   +6 more
doaj   +1 more source

A Primer on Bayesian Model-Averaged Meta-Analysis

open access: yesAdvances in Methods and Practices in Psychological Science, 2021
Meta-analysis is the predominant approach for quantitatively synthesizing a set of studies. If the studies themselves are of high quality, meta-analysis can provide valuable insights into the current scientific state of knowledge about a particular ...
Quentin F. Gronau   +4 more
doaj   +1 more source

Free Space Optics Communication for Ultra-High-Speed Train Running in Evacuated Tube

open access: yesApplied Sciences, 2022
This paper develops a novel communication method for an ultra-high-speed train that runs in an evacuated tube. The proposed method significantly reduces the number of needed base stations to provide adequate coverage and data rates.
Hasan Abbas Al-Mohammed, Elias Yaacoub
doaj   +1 more source

The demographic and economic features: the nexus with internet use

open access: yesHeliyon, 2022
The goal of this study was to examine the nexus between demographic dividend type and economic features with internet use. The data source was from the World Development Indicator of the World Bank. The unit analysis was country.
Wilson Rajagukguk
doaj   +1 more source

A convenient method for the estimation of the multinomial logit model with fixed effects [PDF]

open access: yesEconomics Letters, 2016
Abstract The conditional maximum likelihood estimator of the fixed-effect logit model suffers from a curse of dimensionality that may have severely limited its use in practice. As the number of alternatives and the number of choice situations per individual increase, the number of addends in the denominator of the fixed-effect logit formula grows ...
Iaria, Alessandro   +1 more
openaire   +3 more sources

A Semi-Analytical Nonlinear Approach for Size-Dependent Analysis of Longitudinal Vibration in Terms of Axially Functionally Graded Nanorods [PDF]

open access: yesMechanics of Advanced Composite Structures
In this paper, the size dependency of the nonlinear free longitudinal vibration of axially functionally graded (AFG) nanorods is studied using the nonlocal elasticity theory.
Reza Nazemnezhad
doaj   +1 more source

Catalytic combustion of isopropanol over Co–ZSM-5 zeolite membrane catalysts in structured fixed-bed reactor [PDF]

open access: yesRoyal Society Open Science, 2018
Catalytic combustion of isopropanol in the structured fixed-bed reactor was investigated over Co–ZSM-5 zeolite membrane catalysts. Firstly, ZSM-5 zeolite membrane catalysts with different Si/Al ratios were coated onto the surface of stainless steel ...
Xiaotong Zhang, Ying Yan
doaj   +1 more source

The isolation of nucleic acids from fixed, paraffin-embedded tissues-which methods are useful when?

open access: yes, 2007
Museums and pathology collections around the world represent an archive of genetic material to study populations and diseases. For preservation purposes, a large portion of these collections has been fixed in formalin-containing solutions, a treatment ...
Haselkorn, Tamara   +35 more
core   +1 more source

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