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相关概念视频

Significant Figures in Calculations00:58

Significant Figures in Calculations

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Uncertainty in measurements can be avoided by reporting the results of a calculation with the correct number of significant figures. This can be determined by the following rules for rounding numbers:
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Vector Addition of Forces01:23

Vector Addition of Forces

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When understanding the effects of multiple forces acting on an object, vector addition is a crucial concept to grasp. This mathematical concept can be used to calculate the net force acting on an object when two or more forces are involved.
To understand the concept of vector addition, consider the scenario of a ship being pulled by two small tugboats. The two forces, F1 and F2, act concurrently on the ship in different directions. The parallelogram law can be used to calculate the net force...
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Sum and Difference OpAmps01:22

Sum and Difference OpAmps

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Operational amplifiers (op-amps) are versatile devices that extend beyond amplification. In this context, two specific op-amp configurations are explored: the summing and difference amplifiers.
A summing amplifier, or an adder, utilizes an op-amp to merge multiple input signals into a single output signal. When audio signals are introduced into its input channels, the input resistors initiate currents that traverse feedback resistors, resulting in an output voltage. Applying Kirchhoff's...
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Vector Algebra: Method of Components01:08

Vector Algebra: Method of Components

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It is cumbersome to find the magnitudes of vectors using the parallelogram rule or using the graphical method to perform mathematical operations like addition, subtraction, and multiplication. There are two ways to circumvent this algebraic complexity. One way is to draw the vectors to scale, as in navigation, and read approximate vector lengths and angles (directions) from the graphs. The other way is to use the method of components.
In many applications, the magnitudes and directions of...
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Arithmetic Mean01:08

Arithmetic Mean

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The arithmetic mean is the most commonly used measure of the central tendency of a data set. It is defined as the sum of all the elements constituting the data set, divided by the total number of elements. It is sometimes loosely referred to as the “average.”
When all the values in a data set are not unique, the sum in the numerator can be calculated by multiplying each distinct value by its frequency.
Sometimes, the arithmetic mean of a sample can be affected by a few data points...
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Adjusting a Traverse01:12

Adjusting a Traverse

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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Multimedia Battery for Assessment of Cognitive and Basic Skills in Mathematics BM-PROMA
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添加起来吗?

Gordon Parker1

  • 1Discipline of Psychiatry & Mental Health, School of Clinical Medicine, University of New South Wales, Sydney, NSW, Australia.

Australasian psychiatry : bulletin of Royal Australian and New Zealand College of Psychiatrists
|October 30, 2023
PubMed
概括

该研究假设,增加移动技术和数字媒体的使用可能会导致成人发病的注意力缺陷障碍 (ADD) 和注意力缺陷多动性障碍 (ADHD). 当前的数据和观测证实了这一理论,但需要进一步证明.

科学领域:

  • 神经科学是一个神经科学.
  • 精神病学是一个精神病学.
  • 数字健康数字健康

背景情况:

  • 成年开始的注意力缺陷障碍 (ADD) 和注意力缺陷多动障碍 (ADHD) 存在独特的诊断挑战.
  • 移动技术和数字媒体的普遍使用引发了关于其对认知和行为健康的影响的问题.

研究的目的:

  • 调查移动技术和数字媒体使用作为成年发病ADD/ADHD的病因因素的潜在作用.
  • 探索这样的假设,即增加对数字刺激的暴露可能与这些疾病在成年人中日益增多的患病率有关.

主要方法:

  • 对现有数据和临床观察的审查.
  • 在成人ADD/ADHD的病因因素的假设建模.

主要成果:

  • 初步数据和临床见解表明,数字媒体习惯与成人开始的ADD/ADHD之间存在相关性.
  • 这些发现为进一步实证研究这种关系提供了基础.

结论:

  • 移动技术和数字媒体使用导致成年人发病的ADD/ADHD的假设得到了当前证据的支持.
  • 进一步的研究是必要的,以最终确定因果关系,并了解潜在的机制.
关键词:
注意力缺陷障碍是一种注意力缺陷障碍.注意缺陷多动障碍注意缺陷多动障碍迟发症的注意力缺陷多动性障碍.

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