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Adjusting a Traverse01:12

Adjusting a Traverse

357
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...
357
Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

403
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
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Direct Motor Pathways01:11

Direct Motor Pathways

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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
4.1K
Continuity of a Function01:23

Continuity of a Function

198
A function is continuous at a point a if three conditions are met: the function is defined at a, the limit of the function as x approaches a exists, and this limit equals the function’s value. Mathematically, this is written asThis definition ensures the graph of the function does not exhibit any breaks, holes, or jumps at that point. Discontinuities occur when any of these conditions fail. A removable discontinuity exists when the two-sided limit exists but the function is either...
198
Interference: Path Lengths01:10

Interference: Path Lengths

1.9K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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Masonry Paving01:21

Masonry Paving

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The construction of masonry paving involves using materials such as bricks, stones, and concrete masonry units. These materials are chosen for their shape, color, strength, and resistance to abrasion and weathering. Masonry units can be installed dry on a thin layer of sand and a gravel base, or they can be embedded in mortar or asphalt on a concrete slab. For areas subjected to heavy vehicular loads, a rigid base layer of reinforced or unreinforced concrete is recommended. In contrast,...
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相关实验视频

Updated: Jan 13, 2026

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision
09:29

A Standardized Obstacle Course for Assessment of Visual Function in Ultra Low Vision and Artificial Vision

Published on: February 11, 2014

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这是你的最终目的地吗? 创建的基石路径不同,取决于路径是否结束或继续.

Jeffrey B Wagman1, Will Ervin1, Maisha Tahsin Orthy1

  • 1Department of Psychology, Illinois State University, Normal, USA.

Quarterly journal of experimental psychology (2006)
|October 29, 2025
PubMed
概括
此摘要是机器生成的。

这项研究表明,人们如何创造负担能力或环境行动机会取决于预期的目标. 参与者根据他们是否需要停止或继续,根据不同的路径创建调整,支持新出现的负担能力的想法.

关键词:
负担得起的支出路径 路径 路径 路径一步一步地迈进.

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相关实验视频

Last Updated: Jan 13, 2026

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科学领域:

  • 生态心理学 生态心理学
  • 感知-行动研究研究.
  • 负担得起的理论.

背景情况:

  • 负担能力是生物及其环境之间的更高层次关系.
  • 之前的研究表明,负担能力是直接感知的,而不是从更简单的元素构成的.

研究的目的:

  • 调查是否也可以作为新兴的,更高层次的关系来创造负担能力.
  • 为了确定是否根据预期的动作序列创建affordances有所不同.

主要方法:

  • 参与者使用地毯创建了石路径.
  • 使用了两个条件:"停在B" (路径A到B) 和"继续到C" (路径A到B到C).
  • 路径配置根据差距距,轨迹和可变性进行分析.

主要成果:

  • 对于A-to-B部分的路径创建在"停止在B"和"继续到C"条件之间存在显著差异.
  • 在间隙距离和路径可变性方面观察到特定的差异.
  • 在"继续到C"条件下,A-to-B段与B-to-C段的配置没有发现差异.

结论:

  • 穿越路径的费用是根据总体目标 (停止与继续) 创建的.
  • 这些发现支持了生态学观点,即负担能力是作为新兴的,更高级别的属性而产生的.
  • 这表明,对于负担能力的感知和创造,有一个统一的机制.