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Related Concept Videos

Weir: Problem Solving01:26

Weir: Problem Solving

Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
Frames: Problem Solving I01:24

Frames: Problem Solving I

Consider a jib crane with an external load suspended from the pulley. The dimensions of the crane members are shown in the figure. A systematic analysis of the frame structure is required to determine the reaction forces at the pin joints, assuming that the pulleys are frictionless.
Frames: Problem Solving II01:26

Frames: Problem Solving II

Consider a hydraulic hoist supporting a load of 1 kN. Assuming a simplified schematic representation of this frame structure, the force acting on BD and BF members can be determined.
Problem-Solving01:29

Problem-Solving

Effective problem-solving consists of two steps: 1. identifying the problem and 2. selecting the appropriate problem-solving strategy (i.e., a plan of action used to find a solution). Humans use four problem-solving strategies:
Method of Joints: Problem Solving II01:30

Method of Joints: Problem Solving II

Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
Friction: Problem Solving01:21

Friction: Problem Solving

Friction is an essential force that influences the motion of objects in daily life. Depending on the situation, it can be either beneficial or problematic. Consider a bus with a mass of three megagrams and its center of mass at a specific point, moving along a banked road at a constant speed. The coefficient of static friction between the tires and the road is 0.5. Find the maximum angle of the banked road at which the bus would not slip or tip.
Initially, a visual representation of the...

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Updated: Jun 20, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
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Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

An old problem, a new solution.

Robert E Fintelmann1, Robert H Rosenwasser, Pascal Jabbour

  • 1Wills Eye Institute, Department of Ophthalmology, Philadelphia, Pennsylvania, USA. rofi@gmx.li

Survey of Ophthalmology
|September 4, 2009
PubMed
Summary
This summary is machine-generated.

Carotid artery stenting is an effective treatment for recurrent carotid artery stenosis causing ocular ischemic syndrome. This procedure offers an alternative to traditional carotid endarterectomy for managing vision loss due to artery narrowing.

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Last Updated: Jun 20, 2026

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities
10:26

Problem-Solving Before Instruction (PS-I): A Protocol for Assessment and Intervention in Students with Different Abilities

Published on: September 11, 2021

The Innovation Arena: A Method for Comparing Innovative Problem-Solving Across Groups
14:14

The Innovation Arena: A Method for Comparing Innovative Problem-Solving Across Groups

Published on: May 13, 2022

Area of Science:

  • Vascular Surgery
  • Ophthalmology
  • Interventional Cardiology

Background:

  • Ocular ischemic syndrome (OIS) can result from severe carotid artery stenosis.
  • Recurrent stenosis after carotid endarterectomy poses a treatment challenge.
  • Carotid artery stenting is an established treatment for primary stenosis.

Observation:

  • A 75-year-old woman presented with painful vision loss.
  • Diagnosis revealed ocular ischemic syndrome due to carotid artery restenosis post-endarterectomy.

Findings:

  • The patient successfully underwent carotid artery stenting for recurrent stenosis.
  • Carotid artery stenting is increasingly utilized for secondary carotid artery stenosis.

Implications:

  • Carotid artery stenting provides a viable option for OIS management in recurrent stenosis.
  • This approach may improve outcomes and reduce visual morbidity in affected patients.
  • Further research into stenting for recurrent carotid stenosis is warranted.