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Social Traps01:41

Social Traps

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Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned...
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Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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Manipulation and Analysis01:21

Manipulation and Analysis

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GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
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Noncompartmental Analysis: Mean Transit, Absorption and Dissolution Time01:02

Noncompartmental Analysis: Mean Transit, Absorption and Dissolution Time

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When drugs are administered extravascularly, a comprehensive evaluation through noncompartmental analysis becomes imperative. This analytical approach considers various parameters that play a crucial role in understanding the pharmacokinetics of these drugs.
One of the key parameters is the mean transit time (MTT), which refers to the total duration required for drug molecules to transit through the body. MTT is determined by calculating the ratio of the area under the moment curve to the area...
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

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The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
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相关实验视频

Updated: Jul 18, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

Published on: January 20, 2023

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按需公共交通系统的可持续性分析框架

Nael Alsaleh1, Bilal Farooq2

  • 1Laboratory of Innovations in Transportation (LiTrans), Department of Civil Engineering, Toronto Metropolitan University, Toronto, ON, M5B 2K3, Canada.

Scientific reports
|August 18, 2023
PubMed
概括

按需公共交通 (ODT) 对运输机构来说可能具有成本效益,特别是在没有激增定价的情况下,并且每天低于3.37乘客/平方公里. 电气化车队显著减少了排放,使得ODT成为一个可持续的选择.

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Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
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Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

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Watershed Planning within a Quantitative Scenario Analysis Framework
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Watershed Planning within a Quantitative Scenario Analysis Framework

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相关实验视频

Last Updated: Jul 18, 2025

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Watershed Planning within a Quantitative Scenario Analysis Framework
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科学领域:

  • 运输科学 运输科学
  • 城市规划 城市规划
  • 环境可持续性 环境可持续性

背景情况:

  • 越来越多的人对用按需公共交通 (ODT) 取代固定路线运输感兴趣.
  • 在不同背景下,关于ODT系统的效率和可持续性的不确定性.

研究的目的:

  • 开发一个全面的框架来评估ODT的可持续性.
  • 评估ODT的效率,环境影响和社会公平.

主要方法:

  • 适用于英尼斯菲尔的框架,安大略省的ODT系统 (自2017年开始运行).
  • 基于需求水平和定价策略的成本效益分析.
  • 环境影响评估,包括温室气体 (GHG) 排放.
  • 关于旅行和等待时间的社会公平评价.

主要成果:

  • 众包的ODT在3.37骑手/公里2/天以下是最具成本效益的,没有激增定价.
  • 混合动力系统是最佳的,激增定价在1.18到3.37骑手/公里2/天之间.
  • 私人车辆在3.37乘客/公里2/天以下更具可持续性,但电气化公共交通大幅减少温室气体排放 (>98%).
  • 交通系统在等待和车载时间方面表现出类似的公平性.

结论:

  • 在特定的需求和定价条件下,ODT系统可以高效和可持续.
  • 电气化和优化充电是最大限度地减少公共交通环境足迹的关键.
  • 开放式运输系统提供了与传统运输相美的社会公平.