IMG Seminar: Beamforming Fundamentals and Practical Applications

Event date: 
Thu, 10/14/2010 - 7:00pm to 8:00pm

Presenter: Chris Bahr, Ph.D.

Description: In aeroacoustic testing, the determination of acoustic source locations in an experiment is often critical, as the sources must be located before they can be mitigated.  One of the most common techniques used to determine source locations, known as beamforming, utilizes an array of microphones and acoustic source modeling.

In this presentation, the classic delay-and-sum (DAS) beamformer is discussed in both the time and frequency domains from a theoretical perspective.  Common implementations of the beamformer as used in wind tunnel testing are then shown, with discussion of appropriate usage and corrections.

IMG Seminar: Rapid prototyping capabilities of Mydea Technologies

Event date: 
Wed, 09/29/2010 - 7:00pm to 8:00pm

Guest speaker Mike Siemer, the owner of Mydea Technologies, will speak to IMG about modern day rapid prototyping methods and the rapid prototyping capabilities of Mydea Technologies. Sample fabricated specimens will be available to see during the seminar. All of IMG is encouraged to attend.

Refreshments will be provided.

IMG Seminar: Surface Micromachined Multilayer Composite right/left Handed Metamaterial for Highly Compact RF Circuits

Event date: 
Wed, 09/22/2010 - 8:30pm to 9:00pm

Please note that this week's seminar is from 4PM (not 3PM) due to speaker's conflict.

Snacks and drinks will be served

Speaker: David Senior

Abstract: Highly compact metamaterial devices are demonstrated by combining the composite right-left handed transmission line approach with a multilayer surface micromachined fabrication processusing SU8 as a dielectric layer. Multiband microwave metamaterial applications for ISM frequencies of 2.4GHz and 5.8GHz are implemented The use of microfabrication techniques eliminates the necessity of using surface mounting device (SMD) based lumped components and makes the CRLH structures compatible and integrable with CMOS/MEMS processes while allowing batch fabrication of multiple devices.

IMG Seminar: A High Gain Circular Polarization Antenna using Metamaterial Slabs

Event date: 
Wed, 09/22/2010 - 8:00pm to 8:30pm

Please note that this week's seminar is from 4PM (not 3PM) due to speaker's conflict.

Snacks and drinks will be served

Speaker: Cheolbok Kim

Abstract: Modern satellite communication systems often demand low-profile, wide bandwidth, high gain, and circular polarization antennas. For this applications, a high gain circular polarization antenna with metamaterial slabs has been proposed. Metamaterial slabs having periodic circular lattices have been used to focus beam while fan-shaped patches are added on the slabs to generate circular polarization. The proposed antenna has shown a good axial ratio at the resonant frequency band. It also has shown a simulated gain improvement and transmission gain improvement. In addition, the left/right handed polarization is simply controlled by turning over metamaterial slabs.

IMG Seminar: Spatially Controlled Electrospun Solid Gradient Aligned Nanofiber Tissue Scaffold for Guided Spiral Ganglion Neuron Culture

Event date: 
Wed, 09/15/2010 - 7:00pm to 7:30pm

Speaker: PitFee Jao

The direction of cell growth is associated with chemical, structural and/or mechanical properties of the substrate. Structurally, electrospun nanofibers provide a suitable environment for cell attachment and proliferation due to their similar physical dimension to that of the extracellular matrix. Furthermore, by modulating the topographical features of nanofibers, which include fiber diameter and orientation, cell growth and its related functions can be modified. Here, we demonstrate a solid gradient scaffold for directional growth of spiral ganglion neurons (SGNs).

IMG Seminar: LabVIEW Programming: Reusable, Reliable, Readable

Event date: 
Wed, 09/08/2010 - 7:00pm to 7:30pm

This Wednesday, Jared Allen will be giving a seminar on the LabVIEW programming language. LabVIEW is a very useful tool for data acquisition, analysis, and control. This seminar will discuss different program architectures that can greatly increase performance and reliability. Some useful tips, shortcuts, and program features will be explained.

Note: Drinks and snacks will be provided.