
Thirty-nine crash tests were run under six different restraint conditions at speeds ranging from 10 to 25 miles/hr. The fetus was instrumented with accelerometers in the head and thorax and a transducer to measure force transmission through the uterus. Our goal was to develop a pregnancy insert for the Hybrid III (First Technology, Farmington, Mich.) crash dummy allowing evaluation of the effects of various restraint conditions on energy transmission to both the fetal and maternal compartments.Ī pregnancy insert with an elasticized vinyl uterine shell, simulated silicon amniotic fluid, and a 28-week simulated fetus was fitted to a female crash. Yes, of course, you could achieve the same results by purchasing a separate three-component accelerometer and developing a graphical user interface (GUI) that could display the signal in a user-friendly manner. With some seed funding and guidance from the Incorporated Research Institutions for Seismology (IRIS), SeisMac was honed into a real seismograph. However, freelance programmer Daniel Griscom realized the potential and created SeisMac (which he wrote about in Electronic Seismologist for SRL volume 77, issue 6 (November/December 2006) pp.
#Need seismac values mac
Early on, Mac users discovered this feature and were using it to do things like turn their laptops into Star Wars light sabers (complete with sound effects). Trust us (or, rather, trust the dents in our laptops). These Mac laptops are installed with a sudden-motion sensor, similar to automobile air-bag accelerometers, that is designed to lock up your hard drive if your laptop falls to the ground.
#Need seismac values mac os x
SeisMac is a free Mac OS X application that runs on a MacBook or MacBook Pro and turns built-in accelerometers into a three-component seismograph. Well, your wish has been granted! In fact, you very well may have access to it already. You wish you had an actual seismometer to whip out and use to demonstrate your points. The problem is that you are showing them a static black-and-white image of squiggly lines, and you just can't get them to see the dynamic motions and transfers of energy involved. You are excited and enthusiastic, talking about frequencies and wavelengths, dispersion, Hilbert transforms, and so on, and all you get in return is blank stares. Or maybe it is your spouse (or child, grandparent, parole officer, whatever).

You're trying to explain the arrival of seismic waves to your class.

Have information we can use to flesh out or correct this record let us know.You probably are familiar with the situation. This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect.
#Need seismac values software
The site features a link to download the software and a link to help files for installing and using it. Time labels tell exactly when an event occurred, the sampling rate can be adjusted, and acceleration data can be smoothed. The software allows users to pause the display to study an event scroll back in time to see older data enlarge or contract the graph, both vertically and horizontally and copy, print or save the screen. The resizable, real-time scrolling display lets students see the seismic waves from tapping their toes on the floor, lay the laptop on their chests to see their heartbeats, or see seismic waves from real earthquakes. It uses the Sudden Motion Sensor (accelerometer) that these machines are equipped with to create and display real-time, three-axis acceleration graphs (seismograms). SeisMac is a free Mac OS X application that turns MacBook or MacBook Pro laptops into seismographs.
