Results 1 to 10 of about 602,649 (335)

Rotation Accuracy Analysis of Aerostatic Spindle Considering Shaft’s Roundness and Cylindricity

Applied Sciences, 2021
The rotation accuracy of the aerostatic spindle can easily be affected by shaft shape errors due to the small gas film clearance. Thus, the main shaft shape errors with the largest scale—that is, the roundness and cylindricity errors—are studied in this ...
Guoqing Zhang, Jianming Zheng, Hechun Yu, Renfeng Zhao, Weichao Shi, Jin Wang   +5 more
doaj   +2 more sources

Evaluating Sand Particle Surface Smoothness Using a New Computer-Based Approach to Improve the Characterization of Macroscale Parameters

Geotechnics, 2023
The analysis of sands, and the foundation systems with which they interact, are largely dependent on macroscale behavioral parameters that represent the aggregated response of several microscale characteristics. This research paper examines the influence
Anthony Tessari, Mark Muszynski
doaj   +1 more source

BODY ROUNDNESS INDEX IMPROVES THE PREDICTIVE VALUE OF CARDIOVASCULAR DISEASE RISK IN HYPERTENSIVE PATIENTS WITH OBSTRUCTIVE SLEEP APNEA: A COHORT STUDY

Clinical and experimental hypertension, 2023
Objective: Obesity, especially visceral obesity, plays an important role in the progression of cardiovascular disease (CVD). The body roundness index (BRI) is a new measure of obesity that is considered to reflect visceral obesity more comprehensively ...
Xintian Cai, Shuaiwei Song, Junli Hu, Qing Zhu, Wenbo Yang, Jing Hong, Q. Luo, X. Yao, Nan-fang Li   +8 more
semanticscholar   +1 more source

Systematic effect of particle roundness/angularity on macro- and microscopic behavior of granular materials

Granular Matter, 2023
Roundness/angularity is a vital shape descriptor that significantly impacts the mechanical response of granular materials and is closely associated with many geotechnical problems, such as liquefaction, slope stability, and bearing capacity.
Usman Ali, M. Kikumoto, M. Ciantia, Ying Cui, M. Previtali   +4 more
semanticscholar   +1 more source

Measurement Uncertainty Analysis of the Stitching Linear-Scan Method for the Measurable Dimension of Small Cylinders

Applied Sciences, 2023
A stitching linear scan method is proposed for roundness and diameter measurement of small cylindrical workpieces instead of the conventional rotary scan method due to the crucial alignments of eccentricity and inclination.
Jiali Zhao, Liang Zhang, Dan Wu, Bobo Shen, Qiaolin Li   +4 more
doaj   +1 more source

A nonlinear association between body roundness index and all-cause mortality and cardiovascular mortality in general population

Public Health Nutrition, 2022
Objective: The aim of the study was to investigate the association between body roundness index (BRI) and all-cause mortality and cardiovascular mortality in general population. Design: A retrospective cohort study.
Dan Zhou, Xiao-cong Liu, Yuqing Huang, Ying-qing Feng   +3 more
semanticscholar   +1 more source

Relationship between body roundness index and the risk of heart failure in Chinese adults: the Kailuan cohort study

ESC Heart Failure, 2022
Body roundness index (BRI) is an obesity‐related anthropometric index that combines waist circumference and height to better reflect body fat. This study aims to prospectively explore the relationship between BRI and the risk of heart failure (HF) based ...
Jianing Wang, Mingyang Wu, Shouling Wu, Yaohua Tian   +3 more
semanticscholar   +1 more source

Round and Round [PDF]

Journal of General Internal Medicine, 2010
I know all about vertigo. As a primary care doctor who cares for myriad elderly patients, I treat dizziness all the time. I can distinguish between central and peripheral causes, I know when it’s benign and when it’s concerning, I can recite the pathophysiology of the disorder, I know when to use meclizine and can skillfully instruct people in ...
  +5 more sources

Feasibility Study of a Piezo Actuator as a Potential Standard in Calibration for Roundness Instruments

Sensors, 2022
The paper presents experimental data that show the possible application of a piezo actuator in the role of calibration standard that can serve as an alternative route to currently available methods like gauge blocks or flick standards.
Anna Trych-Wildner, Krzysztof Wildner, Piotr Sosinowski   +2 more
doaj   +1 more source

Influence of roundness errors of bearing components on rotational accuracy of cylindrical roller bearings

Scientific Reports, 2022
Understanding the influence of bearing component roundness errors and roller number on the rotational accuracy of rolling bearings is crucial in the design of high precision bearings.
Y. Yu, Jishun Li, Y. Xue
semanticscholar   +1 more source