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相关概念视频

Sampling Methods: Overview01:06

Sampling Methods: Overview

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A sample refers to a smaller subset representative of a larger population. In analytical chemistry, studying or analyzing an entire population is often impractical or impossible. Therefore, samples are used to draw inferences and generalize the whole population. The sampling method selects individuals or items from a population to create a sample. Standard sampling methods include random, judgemental, systematic, stratified, and cluster sampling. 
In analytical chemistry, the choice of...
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Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

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In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
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Dose Size and Dosing Frequency: Determination Methods01:21

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Determining the optimal dose size and dosing frequency in pharmacotherapy is crucial for achieving therapeutic effectiveness while minimizing adverse effects. This article explores the methodologies employed in determining these parameters, focusing on their significance and interplay to tailor dosing regimens.Dose Size: Dose size refers to the amount of a drug administered in a single dose. It is determined based on the drug's pharmacodynamics and pharmacokinetics properties and...
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Time Course of Drug Effect01:14

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The progression of a drug's impact can be analyzed by examining both the concentration-time course and the effect-time course. The concentration-time course is determined by the drug's half-life and is influenced by factors such as its pharmacokinetics, including absorption, distribution, metabolism, and elimination. The effect of the drug is often related to its concentration in the plasma and is calculated using the maximum drug effect and the plasma concentration that generates 50...
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Data Collection by Experiments01:13

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Data collection is a systematic method of obtaining, observing, measuring, and analyzing accurate information. An experimental study is a standard method of data collection that involves the manipulation of the samples by applying some form of treatment prior to data collection. It refers to manipulating one variable to determine its changes on another variable. The sample subjected to treatment is known as “experimental units.”
An example of the experimental method is a public...
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Convenience Sampling Method00:55

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Sampling is a technique to select a portion (or subset) of the larger population and study that portion (the sample) to gain information about the population. Data are the result of sampling from a population. The sampling method ensures that samples are drawn without bias and accurately represent the population.
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相关实验视频

Updated: Jan 10, 2026

An Application for Pairing with Wearable Devices to Monitor Personal Health Status
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DOSE:一个基于iOS手表的开源工具,用于体验采样.

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    此摘要是机器生成的。

    研究人员创建了DOSE,这是Apple Watch体验采样方法 (ESM) 的开源框架. 这种实用工具使ESM研究能够轻松部署,在实地研究中显示出高响应率和快速交互.

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    科学领域:

    • 数字健康数字健康
    • 人与计算机的交互
    • 心理学研究方法 心理学研究方法

    背景情况:

    • 智能手表提供适合经验采样方法 (ESM) 的低负荷微互动.
    • 尽管果手表很受欢迎,但它缺乏用于ESM部署的可访问框架,这阻碍了研究.
    • 现有的方法往往需要技术专业知识,限制了更广泛的采用.

    研究的目的:

    • 开发和评估DOSE,这是一个开源框架,用于使用Apple Watch进行ESM研究.
    • 为研究人员提供无代码解决方案,用于调查配置,应用程序构建和数据部署.
    • 在现实环境中评估DOSE框架的可行性和有效性.

    主要方法:

    • 开发了DOSE框架,这是Apple Watch ESM的开源工具包.
    • 这是一项为期28天的实地研究,涉及18名参与者 (平均年龄=55.3岁).
    • 评估快速交付可靠性,响应率和交互时间.

    主要成果:

    • DOSE证明了可靠的及时交付,并实现了超过80%的整体响应率.
    • 对于ESM提示的中位相互作用时间始终在10秒以下.
    • 在整个研究期间,参与者表现出更好的反应效率.

    结论:

    • DOSE框架是基于Apple Watch的ESM的实用和可扩展的解决方案.
    • 它降低了研究人员的技术障碍,促进了基于智能手表的研究的更广泛采用.
    • DOSE为推进使用智能手表的移动健康和心理研究提供了坚实的基础.