Results 51 to 60 of about 529,224 (335)

Research on High-Precision Control of Hydraulic Excavator Based on Optimal Trajectory Planning

IEEE Access
In this article, the trajectory planning and high-precision motion control of an excavator based on the independent hydraulic system of the load port are studied.
Junxiang Chen, Kelong Xu, Xiangdong Kong, Yujie Guo, Chao Ai   +4 more
doaj   +1 more source

Space spider crane [PDF]

, 1988
A space spider crane for the movement, placement, and or assembly of various components on or in the vicinity of a space structure is described. As permanent space structures are utilized by the space program, a means will be required to transport cargo ...
Bryan, Charles F., Jr., Kinkead, Rebecca L., Macconochie, Ian O., Mikulas, Martin M., Jr., Pennington, Jack E.   +4 more
core   +1 more source

Modeling and energy-based sway reduction control for tower crane systems with double-pendulum and spherical-pendulum effects

, 2020
As typical underactuated systems, tower crane systems present complicated nonlinear dynamics. For simplicity, the payload swing is traditionally modeled as a single-pendulum in existing works. Actually, when the hook mass is close to the payload mass, or
Menghua Zhang, Yongfeng Zhang, Bing Ji, Changhui Ma, Xingong Cheng   +4 more
semanticscholar   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

The Anatomical Record, EarlyView.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source

Monitoring Grassland Bird Communities with Acoustic Indices

Birds
Several researchers have tried to find relationships between acoustic indices and vocal animal communities to use acoustic indices as a passive monitoring method, as human-derived surveys are expensive, time-consuming, and suffer from observer bias ...
Bethany L. Ostrom, Mary J. Harner, Andrew J. Caven   +2 more
doaj   +1 more source

Exploring Alexithymia, Uncertainty, Anxious Arousal, and Social Anxiety as Mediators of the Relationship Between Sensory Processing Differences and Restricted and Repetitive Behaviors in Autistic Adults

Autism Research, EarlyView.
ABSTRACT Restricted and repetitive behaviors (RRB) are associated with sensory processing (SP) differences for autistic people, and are thought to be a coping strategy to help manage the sensory environment. Previous work shows that, for autistic people, alexithymia, intolerance of uncertainty (IU), and anxiety mediate the relationship between SP ...
Heather L. Moore, Samuel Brice, Natalya Spraggon, Barry Ingham, Mark Freeston, Jeremy R. Parr, Jacqui Rodgers   +6 more
wiley   +1 more source

Sea urchin-inspired rigid-soft hybrid tactile sensor with wide linear range, fast response speed, and excellent robustness

npj Flexible Electronics
Wide linear range and fast response of tactile sensors are crucial for simplifying signal conversion and enhancing real-time perception. However, traditional tactile sensors struggle to control force-electric response and viscoelastic hysteresis ...
Weihua Gao, Jiantao Yao, Xiangyu Fei, Xianhe Yu, Chaoming Li, Congtian Gu, Guoliang Ma, Dakai Wang, Zhiwu Han, Luquan Ren   +9 more
doaj   +1 more source

Climate change and land management implications for a declining Neotropical migratory songbird breeding in the North American Great Plains

Avian Conservation and Ecology, 2020
Anthropogenic climate change and habitat loss pose major threats to grassland breeding birds, the most rapidly declining group of birds in continental North America.
Alex J. Glass, Andrew J. Caven, Daniel Kim, Madison O. Sutton, Nico Arcilla   +4 more
doaj  

Mindfulness and resilience: The experiences of global majority students in a mindfulness intervention Programme at a UK university

British Educational Research Journal, EarlyView.
Abstract Wellbeing in higher education (HE) in the United Kingdom has been increasingly prioritised for many institutions, with a growing demand for student support requests. There are various determinants in life that can influence mental health. As such, protected characteristics, including race, can indicate that students who are Black or Asian ...
Amy Bywater, Helen Keane
wiley   +1 more source

Parents’ Growth Mindsets and Home-Learning Activities: A Cross-Cultural Comparison of Danish and US Parents

Frontiers in Psychology, 2020
Mindset is a term commonly used to represent an individual’s beliefs about the role of ability and effort in learning. In this study, we assessed parental mindset—ability mindset and effort mindset—for 497 parents in two countries (United States and ...
Laura M. Justice, Kelly M. Purtell, Dorthe Bleses, Sugene Cho   +3 more
doaj   +1 more source