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Related Concept Videos

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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Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
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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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Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
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A schema is a mental construct consisting of a cluster or collection of related concepts (Bartlett, 1932). There are many different types of schemata, and they all have one thing in common: schemata are a method of organizing information that allows the brain to work more efficiently. When a schema is activated, the brain makes immediate assumptions about the person or object being observed.
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Drug regulation encompasses the management of drug usage by evaluating its safety and efficacy through assessments conducted by regulatory authorities. Regrettably, the history of drug regulation is marred by several catastrophic events. One such incident is the Elixir Sulfanilamide tragedy, in which the toxic compound diethyl glycol was included in a sweet-tasting medication, leading to numerous fatalities. This event prompted the enactment of the Food, Drug, and Cosmetic Act in 1938. Under...
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Related Experiment Video

Updated: May 17, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
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Bridging THC Knowledge Gaps for Safer Roads: A Call for Action.

Peizhi Li1, Guohua An1

  • 1Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, University of Iowa, Iowa City, Iowa, USA.

Clinical Pharmacology and Therapeutics
|May 16, 2025
PubMed
Summary

Rising cannabis-impaired driving needs better laws. More research on THC

Area of Science:

  • Public Health
  • Forensic Science
  • Pharmacology

Background:

  • Cannabis-impaired driving is a growing public safety issue.
  • Current state regulations lack scientific validation.
  • Limited clinical data hinders understanding of THC's effects.

Purpose of the Study:

  • To highlight the need for improved cannabis driving regulations.
  • To emphasize the importance of comprehensive THC pharmacokinetics (PK) and pharmacodynamics (PD) research.

Main Methods:

  • This study is a call for action, not an experimental study.
  • It reviews existing challenges in cannabis-impaired driving research.

Main Results:

  • Current regulations for cannabis-impaired driving are not scientifically robust.

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  • Insufficient understanding of THC's PK/PD is a major barrier.

    • Conclusions:

    • Further research into cannabis pharmacokinetics and pharmacodynamics is crucial.
    • Collaboration between researchers and policymakers is needed to validate and improve driving regulations.