Results 91 to 100 of about 145,655 (304)

An Experimental Study of the Feasibility of Identifying the Impact Damages of Reinforced Concrete Piers Using a Modal Frequency Method

Advances in Civil Engineering, 2020
In this research study, horizontal impact tests were carried out on five reduced scale pier models using China’s most advanced multifunctional ultrahigh heavy drop hammer impact test system and DHDAS dynamic signal acquisition and analysis system. Due to
Xiwu Zhou, Wenchao Zhang, Yushen Gao, Guoxue Zhang, Mengdan Wen   +4 more
doaj   +1 more source

A cross-national study on the antecedents of work–life balance from the fit and balance perspective [PDF]

, 2019
Drawing on the perceived work–family fit and balance perspective, this study investigates demands and resources as antecedents of work–life balance (WLB) across four countries (New Zealand, France, Italy and Spain), so as to provide empirical cross ...
A Grönlund, A Newman, A Ollier-Malaterre, A Ollier-Malaterre, A Ollier-Malaterre, A Ollier-Malaterre, A Ollier-Malaterre, AA Grandey, AB Butler, Albert Sune, Ariane Ollier-Malaterre, BB Baltes, C Straub, CA Thompson, DA Kenny, DE Guest, DT Hall, E Hill, E Riva, EE Kossek, EE Kossek, EE Kossek, EL Kelly, F Buonocuore, F Pichler, GN Powell, GN Powell, GW Cheung, HK Knudsen, HN Odle-Dusseau, I Laurijssen, J Greenhaus, J Keeney, J Sturges, J Sturges, JA Chatman, Jarrod M. Haar, JC Bou, JCP Maertz, JF Hair, JH Greenhaus, JH Greenhaus, JM Haar, JM Haar, JM Haar, JS Michel, JV Johnson, K Byron, KM Shockley, L Aiken, LA McNall, LB Hammer, LB Hammer, LB Hammer, LJ Williams, LL Brummelhuis ten, LN Lapierre, LT Eby, M Csikszentmihalyi, M Evans, M Russo, M Russo, M Valcour, M Vera, Marcello Russo, ML Kohn, ML Kohn, MR Frone, MR Frone, N Yang, P Biernacki, P Moen, P Voydanoff, P Voydanoff, PE Spector, PM Bentler, RA Karasek, RA Karasek, RA Karasek, RW Brislin, S Schieman, S Wayne, SAY Poelmans, SE Anderson, SJ Lambert, SL Boyar, SL Boyar, SR Marks, TD Allen, TL Crain, VS Carvalho, WJ Casper, Z Chen   +92 more
core   +2 more sources

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Identifying Physical Interactions in Contact‐Based Robot Manipulation for Learning from Demonstration

Advanced Robotics Research, EarlyView.
Robots can learn manipulation tasks from human demonstrations. This work proposes a versatile method to identify the physical interactions that occur in a demonstration, such as sequences of different contacts and interactions with mechanical constraints.
Alex Harm Gert‐Jan Overbeek, Herman van der Kooij, Douwe Dresscher, Mark Vlutters   +3 more
wiley   +1 more source

Machining stability and machine tool dynamics [PDF]

, 2007
Machining is a common manufacturing process in industry due to its high flexibility and ability to produce parts which excellent quality. The productivity and quality in machining operations can be limited by several process constraints one of which is ...
Budak, Erhan
core  

In Situ Measurements of Interfacial Contact Pressure During Impact Hammer Tests [PDF]

Understanding the nonlinear dynamical contact interactions within joints is crucial for understanding and predicting the dynamics of assembled structures. In spite of this, most experimental investigations focused on the global vibration behavior, since the local interactions at the interface cannot be observed with standard techniques.
B. Seeger, P. Butaud, M. V. Baloglu, F. Du, M. R. W. Brake, C. W. Schwingshackl   +5 more
openaire   +1 more source

Techno‐Economic Analysis of Polylactic Acid from Corn Stover: Understanding Uncertainty and Variability via Artificial Intelligence Tools

Advanced Sustainable Systems, EarlyView.
This study analyses the uncertainty and variability existing in the economic performance of polylactic acid (PLA) production, via integrating techno‐economic analysis with process models and Monte Carlo simulation enabled by artificial intelligence. The results show that the minimum selling price varies from $2,107 to $3076/t PLA.
Yinqiao Wang, Jiawei Huang, Chuan Xu, Sipan Liu, Junwei Li, Kai Lan   +5 more
wiley   +1 more source

Concrete production using marble powder and marble coarse aggregates: an analysis of mechanical properties and sustainability

Budownictwo i Architektura
The growing demand for concrete driven by infrastructure and urbanization puts pressure on natural resources and harms the ecosystem. Using recycled materials like waste marble powder (WMP) and marble coarse aggregates (MCA) in concrete can address this
Saloua Filali, Abdelkader Nasser
doaj   +1 more source

Ground Simulation Test of 2D Dynamic Overload Environment of Fuze Launching

Shock and Vibration, 2020
The fuze launch process is subjected to backseat and spin overloads. To address this issue, a loading method of a 2D dynamic acceleration environment was developed in this study for testing fuze antioverload performance on ground.
Zhibo Wu, Tiehua Ma, Yanbing Zhang, Hongyan Zhang   +3 more
doaj   +1 more source

Pollen elicits proboscis extension but does not reinforce PER learning in honeybees [PDF]

, 2013
The function of pollen as a reward for foraging bees is little understood, though there is evidence to suggest that it can reinforce associations with visual and olfactory floral cues.
Casteel, Erber, Goodman, Hammer, Hardin, Levin, Menzel, Menzel, Robertson, Roulston, Schmidt   +10 more
core   +2 more sources