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  • Video 
    Why the Tacoma Narrows Bridge Collapsed

    Why the Tacoma Narrows Bridge Collapsed

    Wind can be one of the most critical and complicated loads on civil structures. The case of the Tacoma Narrows bridge is a well-known cautionary tale that’s discussed in engineering and physics classrooms across the world. Both resonance from vortex shedding and aeroelastic flutter contributed to the failure. When you push the envelope, you have to be vigilant because things that didn’t matter before start to become important (e.g. wind loads on lighter structures). Unanticipated challenges are a cost of innovation and that’s something that we can all keep in mind.

    Subjects:
    Structural Engineering
    Keywords:
    Washington (State) -- Tacoma -- Tacoma Narrows Bridge (1940) Suspension bridges Wind-pressure
    Resource Type:
    Video
     
  • Video 
    Why Tunnels Don't Collapse

    Why Tunnels Don't Collapse

    This video shows how simple reinforcement is used to prevent collapse of rock tunnels. Tunnels play an important role in our constructed environment as passageways for mines, conveyance for utilities, and routes for transportation. Rock bolts are a type of reinforcement for stabilizing rock excavations, usually made from steel bars or bolts. This simple construction method dramatically reduces the cost of making tunnels through rock safe from collapse.

    Subjects:
    Structural Engineering
    Keywords:
    Underground construction Rock bolts Tunneling Tunnels
    Resource Type:
    Video
     
  • Video 
    Why Concrete Needs Reinforcement

    Why Concrete Needs Reinforcement

    This video shows more destructive testing to answer your questions about concrete. Concrete's greatest weakness is its tensile strength, which can be less than 10% of its compressive strength. So, we often reinforce it to create a composite material strong against all types of stress. This video briefly touches on conventional rebar and prestressed/post-tensioned reinforcement.

    Subjects:
    Building and Real Estate
    Keywords:
    Reinforced concrete Concrete
    Resource Type:
    Video
     
  • Video 
    Why Bridges Move...

    Why Bridges Move...

    This video explains why ridges move, and other musings on thermal movement of large civil works. Most people have a certain intuition about thermal expansion, but you may not have considered how engineers design to accommodate it on large civil structures. The video gives a quick overview on this important consideration that engineers must account for when designing infrastructure like pipelines, bridges, and even sidewalks.

    Subjects:
    Structural Engineering
    Keywords:
    Structural analysis (Engineering) Expansion (Heat)
    Resource Type:
    Video
     
  • Video 
    When Trees Meet Buildings

    When Trees Meet Buildings

    Architects, engineers and developers are creating increasingly greener structures - and doing it in a more literal way than ever before. This is what happens when trees meet buildings.

    Subjects:
    Environmental Engineering, Building Services Engineering, and Building and Real Estate
    Keywords:
    Buildings -- Energy conservation Roof gardening Sustainable buildings Sustainable construction Trees in cities
    Resource Type:
    Video
     
  • Video 
    What is Prestressed Concrete?

    What is Prestressed Concrete?

    Sometimes conventional reinforcement isn't enough. The basics of prestressed concrete. Prestressing reinforcement doesn't necessarily make concrete stronger. But, it does increase the serviceability of concrete members by reducing the amount of deflection under load. This video explains the two most common types of prestressed concrete: pre-tensioned and post-tensioned. Prestressed concrete is used in all kinds of structures from bridges to buildings to silos and tanks. It’s a great way to minimize cracking and take fuller advantage of the incredible strength of reinforced concrete.

    Subjects:
    Building and Real Estate
    Keywords:
    Prestressed concrete Reinforced concrete
    Resource Type:
    Video
     
  • Video 
    What is Concrete?

    What is Concrete?

    What's the difference between concrete and cement? Concrete is the most important construction material on earth and foundation of our modern society. At first glance it seems rudimentary, but there is a tremendous amount of complexity involved in every part of designing and placing concrete. This video is meant to be a bare-bones introduction to the topic, with a cool demonstration of concrete strength using a hydraulic press.

    Subjects:
    Building and Real Estate
    Keywords:
    Concrete Cement
    Resource Type:
    Video
     
  • Video 
    What is Cavitation?

    What is Cavitation?

    This video shows the basics of fluid cavitation, including demonstration from AvE. If you subject a fluid to a sudden change in pressure, some interesting things can happen. You can cause tremendous damage to moving parts, or you can harness this destructive power in many beneficial ways.

    Keywords:
    Hydrodynamics Cavitation Fluid mechanics
    Resource Type:
    Video
     
  • Video 
    Was Roman Concrete Better?

    Was Roman Concrete Better?

    This video discusses a few modern techniques that help improve design life of concrete, including roller compacted concrete (RCC) and water reducing admixtures (superplasticizers). There are a whole host of differences between modern concrete and that of the western Roman empire that I didn’t have time to go into, including freeze/thaw damage.

    Subjects:
    Building and Real Estate
    Keywords:
    Concrete construction Roller compacted concrete Concrete -- Additives Concrete
    Resource Type:
    Video
     
  • Open (Access) Journal-Article 
    Using Six Sigma DMAIC Methodology and Discrete Event Simulation to Reduce Patient Discharge Time in King Hussein Cancer Center

    Using Six Sigma DMAIC Methodology and Discrete Event Simulation to Reduce Patient Discharge Time in King Hussein Cancer Center

    Short discharge time from hospitals increases both bed availability and patients and families satisfaction. In this study, the Six Sigma process improvement methodology was applied to reduce patients discharge time in a cancer treatment hospital. Data on the duration of all activities, from the physician signing the discharge form to the patient leaving the treatment room, were collected through patient shadowing. These data were analyzed using detailed process maps and cause-and-effect diagrams. Fragmented and unstandardized processes and procedures and a lack of communication among the stakeholders were among the leading causes of long discharge times. Categorizing patients by their needs enabled better design of the discharge processes. Discrete event simulation was utilized as a decision support tool to test the effect of the improvements under different scenarios. Simplified and standardized processes, improved communications, and system-wide management are among the proposed improvements, which reduced patient discharge time by 54 from 216 minutes. Cultivating the necessary ownership through stakeholder analysis is an essential ingredient of sustainable improvement efforts.

    Subjects:
    Health Sciences and Management
    Keywords:
    Hospitals -- Administration Process control Six sigma (Quality control stard)
    Resource Type:
    Open (Access) Journal-Article
     
    OER