Results 21 to 30 of about 2,532,253 (181)

Personality and leadership: a qualitative and quantitative review.

open access: yesJournal of Applied Psychology, 2002
This article provides a qualitative review of the trait perspective in leadership research, followed by a meta-analysis. The authors used the five-factor model as an organizing framework and meta-analyzed 222 correlations from 73 samples.
T. Judge   +3 more
semanticscholar   +1 more source

Shrinkage of Micro-Synthetic Fiber-Reinforced Mortar

open access: yesInfrastructures, 2022
Repair materials have been developed in this research by adding micro-synthetic fibers in cement-based mortar. In addition, accelerator is incorporated in the mortar to obtain high early strength of the repair materials.
Endah Safitri   +2 more
doaj   +1 more source

Presolving linear bilevel optimization problems

open access: yesEURO Journal on Computational Optimization, 2021
Linear bilevel optimization problems are known to be strongly NP-hard and the computational techniques to solve these problems are often motivated by techniques from single-level mixed-integer optimization.
Thomas Kleinert   +3 more
doaj  

Competitive Variety Testing of winter common wheat in the conditions of the Penza region

open access: yesЗерновое хозяйство России, 2023
The current paper has presented the results of winter common wheat, studied in the nursery of the Competitive Variety Testing in the forest-steppe zone of the Penza region for 2016–2020.
S. V. Kosenko
doaj   +1 more source

Outcome of Root Canal Treatments Using a New Calcium Silicate Root Canal Sealer: A Non-Randomized Clinical Trial

open access: yesJournal of Clinical Medicine, 2020
Background: The aim of this study was to compare the success rate of root canal treatments undertaken using a calcium silicate root canal sealer in combination with a single cone with non-calcium silicate cement and warm vertical condensation.
A. Zavattini   +3 more
semanticscholar   +1 more source

Isolation and screening of a chitin deacetylase producing Bacillus cereus and its potential for chitosan preparation

open access: yesFrontiers in Bioengineering and Biotechnology, 2023
Chitosan is a biopolymer material extracted from marine biomass waste such as shrimp and crab shells, which has good biocompatibility and degradability with great potential for application in the field of wastewater treatment and soil remediation.
Yingying Zhang   +5 more
doaj   +1 more source

Dye Removal From Textile Waste Water Through The Adsorption By Pumice Used In Stone Washing

open access: yesAUTEX Research Journal, 2015
Because the waste production is inevitable in almost all industries, the elimination of these wastes is a requirement in terms of environmental regulations and welfare of all the creatures in the future.
Körlü Aysegül Ekmekçi   +4 more
doaj   +1 more source

Synthesis of [B,Al]-EWT-Type Zeolite and Its Catalytic Properties

open access: yesMolecules, 2022
EWT zeolite belongs to ultra-large pore zeolite with the 10MR and 21MR channels, which has good thermal stability, certain acid strength and good application prospects in petroleum refining and petrochemical reactions.
Youju Wang   +5 more
doaj   +1 more source

The study of the source material of potatoes under conditions of Kirov region

open access: yesАграрная наука Евро-Северо-Востока, 2020
The article presents the results of study of potato varieties and hybrids collection in the conditions of Kirov region, including varieties of modern Russian and foreign collections, interspecific hybrids of VIR, Falenskaya selection station and other ...
N. F. Sintsova, I. V. Lyskova
doaj   +1 more source

A robust basic cyclic scheduling problem

open access: yesEURO Journal on Computational Optimization, 2018
This paper addresses the Basic Cyclic Scheduling Problem where the processing times are affected by uncertainties. We formulate the problem as a two-stage robust optimization problem with a budgeted uncertainty set.
Idir Hamaz   +2 more
doaj  

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