On the spatial stability of tube flows subject to body forces

1993 ◽  
Vol 5 (12) ◽  
pp. 3107-3121 ◽  
Author(s):  
D. J. Goering ◽  
J. A. C. Humphrey
Keyword(s):  
Spatial Stability ◽  
Body Forces

Delta function model for the helium trimer: origin of three-body forces

2001 ◽  
Vol 99 (1) ◽  
pp. 53-56 ◽  
Author(s):  
S. M. Blinder, Lawrence L. Lohr
Keyword(s):  
Delta Function ◽  
Function Model ◽  
Helium Trimer ◽  
Body Forces ◽  
Three Body

Large eddy simulation in complex geometric configurations using boundary body forces

AIAA Journal ◽  
2000 ◽  
Vol 38 ◽  
pp. 427-433 ◽  
Author(s):  
Roberto Verzicco ◽  
Jamaludin Mohd-Yusof ◽  
Paolo Orlandi ◽  
Daniel Haworth
Keyword(s):  
Large Eddy Simulation ◽  
Eddy Simulation ◽  
Geometric Configurations ◽  
Body Forces ◽  
Large Eddy

Extension of f and g series to non-two-body forces

1964 ◽  
Author(s):  
R. BAKER, JR.
Keyword(s):  
Body Forces

Cycle Length Dynamics and Spatial Stability at the Onset of Postinfarction Monomorphic Ventricular Tachycardias Induced in Patients and Canine Preparations

Circulation ◽  
1996 ◽  
Vol 93 (10) ◽  
pp. 1845-1859 ◽  
Author(s):  
Alain Vinet ◽  
René Cardinal ◽  
Pierre LeFranc ◽  
François Hélie ◽  
Pierre Rocque ◽  
...  
Keyword(s):  
Cycle Length ◽  
Spatial Stability ◽  
Ventricular Tachycardias

Variance and the Large Scale Spatial Stability of Aphids, Moths and Birds

10.2307/4230 ◽  
1980 ◽  
Vol 49 (3) ◽  
pp. 831 ◽  
Author(s):  
L. R. Taylor ◽  
I. P. Woiwod ◽  
J. N. Perry
Keyword(s):  
Large Scale ◽  
Spatial Stability

Hate Crime and Place: The Spatial and Temporal Concentration of Bias-Motivated Crime in Washington, D.C.

2021 ◽  
pp. 088626052098781
Author(s):  
Marin R. Wenger ◽  
Brendan Lantz
Keyword(s):  
Hate Crime ◽  
Hate Crimes ◽  
Temporal Perspective ◽  
Spatial Stability ◽  
Units Of Analysis ◽  
Crime Types ◽  
High Degree ◽  
Block Groups ◽  
Street Segments

Prior research suggests that many crime types are spatially concentrated and stable over time. Hate crime, however, is a unique crime type that is etiologically distinct from others. As such, examination of hate crime from a spatial and temporal perspective offers an opportunity to understand hate crime and the spatial concentration of crime more generally. The current study examines the spatial stability of hate crimes reported to the police in Washington, D.C., from 2012 through 2018 using street segments, intersections, and block groups as units of analysis. Findings reveal that hate crime is spatially concentrated, with less than 4% of street segments and intersections experiencing hate crime over the study period. Results reveal a high degree of spatial stability, both year-to-year and over the long term even when restricting the analysis to units that experienced at least one hate crime.

scholarly journals Design, modeling, and demonstration of a new dual-mode back-assist exosuit with extension mechanism

2021 ◽  
Vol 2 ◽  
Author(s):  
Erik P. Lamers ◽  
Karl E. Zelik
Keyword(s):  
Biomechanical Model ◽  
Mode Switching ◽  
Design Parameters ◽  
Dual Mode ◽  
Extension Mechanism ◽  
Body Forces ◽  
Low Profile ◽  
Military Healthcare ◽  
The Moment ◽  
Practical Factors

Abstract Occupational exoskeletons and exosuits have been shown to reduce muscle demands and fatigue for physical tasks relevant to a variety of industries (e.g., logistics, construction, manufacturing, military, healthcare). However, adoption of these devices into the workforce has been slowed by practical factors related to comfort, form-factor, weight, and not interfering with movement or posture. We previously introduced a low-profile, dual-mode exosuit comprised of textile and elastic materials to address these adoption barriers. Here we build upon this prior work by introducing an extension mechanism that increases the moment arm of the exosuit while in engaged mode, then collapses in disengaged mode to retain key benefits related to being lightweight, low-profile, and unobstructive. Here we demonstrate both analytically and empirically how this extensible exosuit concept can (a) reduce device-to-body forces (which can improve comfort for some users and situations), or (b) increase the magnitude of torque assistance about the low back (which may be valuable for heavy-lifting jobs) without increasing shoulder or leg forces relative to the prior form-fitting exosuit. We also introduce a novel mode-switching mechanism, as well as a human-exosuit biomechanical model to elucidate how individual design parameters affect exosuit assistance torque and device-to-body forces. The proof-of-concept prototype, case study, and modeling work provide a foundation for understanding and implementing extensible exosuits for a broad range of applications. We envision promising opportunities to apply this new dual-mode extensible exosuit concept to assist heavy-lifting, to further enhance user comfort, and to address the unique needs of last-mile and other delivery workers.

Spatial stability of arc and weld formation in welding thin sheets of AI with right‐angle different polarity pulses

2001 ◽  
Vol 15 (10) ◽  
pp. 805-807
Author(s):  
I E Lapin ◽  
V A Kosovich ◽  
A N Potapov ◽  
O A Rusol
Keyword(s):  
Thin Sheets ◽  
Weld Formation ◽  
Spatial Stability
Sign in / Sign up

Export Citation Format

Share Document