Results 111 to 120 of about 9,441 (308)

Opening the Black Box of Nonprofit Reputation and Volunteer Attraction With Supervised Machine Learning

Nonprofit Management and Leadership, EarlyView.
ABSTRACT With the aim to explore the potential of machine learning for nonprofit research, this article contrasts traditional linear regression with four contemporary supervised machine learning approaches. Concretely, we predict (1) reputation ratings and (2) the total number of volunteers for 4021 non‐profit organizations in the U.S.
Moritz Schmid, Hannes Lampe, Jurgen Willems   +2 more
wiley   +1 more source

Tertiary creep in concrete

, 2017
Time dependent concrete fracture is simulated using a rate type creep model coupled with a discrete concrete model. The numerical study uses experimental data, of various tests, three point bending, relaxation, tensile, performed on concrete. This contribution demonstrates the capability of the model to capture the time dependent fracture behavior of ...
I. Boumakis, G. Di Luzio, J. Vorel, R. Wendner   +3 more
openaire   +1 more source

Coupling creep and damage in concrete under high sustained loading: Experimental investigation on bending beams and application of Acoustic Emission technique

EPJ Web of Conferences, 2010
Creep and damage in concrete govern the long-term deformability of concrete. Thus, it is important to understand the interaction between creep and damage in order to design reliable civil engineering structures subjected to high level loading during a
Grondin F., Loukili A., Saliba J.
doaj   +1 more source

Experimental Research and Numerical Simulation of Post-Crack Creep Behavior of SFRC Loaded in TensionMechanics and Physics of Creep, Shrinkage, and Durability of Concrete

, 2013
This paper mainly studies uniaxial tensile creep behavior of pre-cracked steel fiber reinforced concrete (SFRC). A series of uniaxial tensile creep tests were carried out on SFRC cylinder specimens which were pre-cracked at 0.2mm.
Guanyu Zhao, Lucie Vandewalle, Marco di Prisco, DI PRISCO, MARCO   +3 more
core   +1 more source

Toward a Framework for Understanding Localization in Its Institutional Context: A Systems Perspective for Incorporating Local Values

Public Administration and Development, EarlyView.
ABSTRACT This paper explores how we might integrate local traditional values into a systems approach for analyzing and maximizing localization in the context of foreign aid. The paper situates localization and its operationalization in the older and broader literature on the political economy of foreign aid.
Jennifer M. Brinkerhoff
wiley   +1 more source

CREEP Coefficient and Specific Creep of Engineered Cementitious Composite -Bendable Concrete

Civil and Environmental Engineering
Creep is a complex behavior of concrete since it induces different stages of response under loading and unloading with time. It represents the time-dependent strain as a result of a constant sustained load applied with time.
Al-Mulla Ikram Faraoun, Al-Ameeri Abbas Salim, Al-Attar Tareq Salih   +2 more
doaj   +1 more source

Early-age tensile creep and shrinkage-induced cracking in internally restrained concrete members

, 2019
© 2018 ICE Publishing: All rights reserved. Experiments were carried out under ambient conditions and in a temperature-humidity control room to assess the influences of early-age shrinkage and tensile creep on cracking in reinforced-concrete (RC) members
Gilbert, RI, Castel, A, Xu, T, Khan, I
core   +1 more source

What turns us off about green and blue spaces in cities? Understanding perceived problems and unpleasant experiences for more just urban planning, design and management

People and Nature, EarlyView.
Abstract The planning, design and management of urban green and blue spaces necessitate trade‐offs between these spaces' many benefits and their drawbacks, but knowledge of perceived problems and unpleasant experiences in urban green and blue spaces remains limited.
Alyssa L. Solvie, Oriol García‐Antúnez, Elizabeth M. Cook, Natalie M. Gulsrud, Anton Stahl Olafsson, Megan Maurer   +5 more
wiley   +1 more source

A study of time-dependent deformations in modern concrete

, 2009
If we consider modem concrete structures subjected to severe environment or severe loading, dense concretes are often used. Hereby, two important features are creep and shrinkage that have paramount importance for serviceability, durability, and long ...
Jonasson, Jan-Erik,
core  

Value‐Added Recycling of Beverage Carton Waste Into Thermoplastic Sandwich Structures With Enhanced Energy Absorption and Damping Properties

Polymer Composites, EarlyView.
Preparation of lightweight composite panels from multilayer beverage carton waste. ABSTRACT Beverage carton waste, a multi‐layer composite of cardboard, polymer, and aluminum, presents significant recycling challenges for conventional recovery technologies. This work presents a manufacturing process‐oriented method that allows shredded beverage cartons
Csenge Tóth, Róbert Nagy, Ábris Dávid Virág   +2 more
wiley   +1 more source