相关实验视频
Updated: Aug 1, 2026
09:36
Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
3.2K
抓能力:英国人口的互测可靠性和规范性抓强度
Sharah Abdul Mutalib1, Deepika Sharma2, Sonia Pike2
1GRIPABLE Ltd, London, UK; Bioengineering Department, Imperial College of Science, Technology and Medicine, London, UK.
概括
这项研究在使用GripAble设备的英国成年人群中确定了手握强度的可靠参考值. 这些发现证实了GripAble的存在.
科学领域:
- 生物医学工程 生物医学工程
- 老年学是指老年学的学科.
- 公共卫生 公共卫生
背景情况:
- 手握强度 (HGS) 是预测死亡率,残疾和疾病风险的关键健康指标和生物标志物.
- GripAble动力表为HGS测量提供了现代,数字和准确的方法.
研究的目的:
- 为了评估最大抓力 (MGS) 测量的测量器间可靠性.
- 通过使用GripAble.为英国成年人口建立性别,年龄组和手工分层的规范性MGS参考值.
主要方法:
- 采用了横截面研究设计.
- 评估者之间的可靠性是使用三个评价者和30名参与者之间的类内相关性来评估的.
- 从907名参与者中收集了规范性MGS数据,分析包括描述性统计数据,年龄相关趋势的定量回归和人口统计影响的通用线性模型.
主要成果:
- 在MGS测量中观察到极佳的间隔测量器可靠性 (ICC = 0.991).
- MGS与年龄呈现出曲线关系,在中年达到峰值,然后下降.
- 性别和手的优势是MGS的主要决定因素,手的长度,周长,年龄,体重和身高也影响了结果.
结论:
- 该研究为使用GripAble的英国成年人提供了规范性MGS参考值,有助于解释测量结果.
- 据证实,GripAble是测量MGS的可靠和有效工具,得到了本研究和以前的研究的支持.
更多相关视频
08:40Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
Published on: June 12, 2019
7.4K
07:22Measuring the Motor Aspect of Cancer-Related Fatigue using a Handheld Dynamometer
Published on: February 20, 2020
5.9K
相关概念视频
01:24Testing a Claim about Population Proportion
A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
01:20Strength of Cement
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in ASTM C...
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in ASTM C...
01:12Bonding and Strength of Aggregate
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
01:12Non-destructive Tests for Concrete Strength
The rebound hammer test, also known as the Schmidt hammer test, is a non-destructive technique for evaluating the hardness of concrete and, indirectly, the strength of concrete. It operates on the principle that the rebound of a spring-driven mass from a concrete surface correlates to the surface's hardness. The device comprises a mass within a tubular housing, a spring mechanism, and a plunger that strikes the concrete. Upon release, the energy imparted to the mass by the spring causes it to...
01:30Relation Between Tensile Strength and Compressive Strength of Concrete
Concrete is a fundamental building material, and understanding its strengths is crucial for construction projects. The relationship between its tensile and compressive strengths is intricate, showing that while these strengths are related, they do not increase at the same rate. Tensile strength's growth is slower and is affected by various factors such as the methods used for testing, the size and shape of the specimen, the texture of the aggregate used, and the moisture content of the concrete.
01:21Impact Strength of Concrete
Impact strength in concrete is a critical measure that reflects the material's capability to endure the forces applied during pile driving and when supporting machinery foundations that experience impulsive loads. It is also essential when handling precast concrete components to prevent accidental damage. The impact strength is assessed by observing the concrete's resistance to repeated impacts and energy absorption capacity. A key indicator of significant damage to concrete is when it does not...