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Calculation Example – Undamped free Vibration (Part B).
Calculate the modal frequencies for the shear frame at the previous exercise Undamped free Vibration (Part A). The story weight of the first floor is W1=60 KN end at the second floor W2=50 KN. The cro...
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ExxonMobil is sued again, this time for polluting Mystic River
The company is accused for not taking action against the potential impacts of climate change that would result in the release of toxic pollutants The company is accused for not taking action agains...
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DFI Releases Report from Workshop on Quality Assurance for Post-Grouted Drilled Shafts
Deep Foundations Institute (DFI) has released a free, 187-page report from a workshop on quality assurance practices for acceptance of post-grouted drilled shafts. Deep Foundations Institute (DFI) ha...
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Small and elegant wind turbine trees generate energy in urban environments
A French company aspires to change the established perception of ugly and noisy wind generators A French company aspires to change the established perception of ugly and noisy wind generators Fren...
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Meet this three-wheeled electric scooter for those who want to go smaller
Its creator believes it is the future of transportation Its creator believes it is the future of transportation Kartik Ram, the inventor of the Zeitgeist electric bike which debuted this spring, i...
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Texas remembers the deadly accident of September, 15th, 2001
The State of Texas organized a ceremony to commemorate the victims of the accident of September 15th, 2001. That day, the Queen Isabella Causeway bridge in Texas collapsed because of a collision betwe...
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NASA Research Indicates Mercury is Seismically Active
Based on research from data collected with the MESSENGER spacecraft, NASA believes that Mercury is tectonically active. If correct, this makes Mercury the only tectonically active planet in the solar...
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Soil consistency evaluation with the HS-4210 digital static cone penetrometer
The HS-4210 digital, static cone penetrometer (DSCP), with its large, digital readout, makes testing and recording readings easy. The DSCP can be used to evaluate soil consistency by determining the s...
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Magnetite particles from air pollution found in human brains are linked to higher risk of Alzheimer’s disease
However, the research is still a long way from proving that the air pollution particles cause or exacerbate Alzheimer’s. However, the research is still a long way from proving that the air po...
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Building collapses in Italy: the second failure in few days!
Last Thursday, a collapse of a four-story building occurred in the Ponte Milvio area of northern Rome, near the Foreign Ministry. Fortunately there are no deaths or injuries, but many people lost thei...
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