Archive for July, 2009

Scientists Close to Creating Artificial Human Brain

Model of Human Brain

Image provided by bbc.co.uk


Scientists in Switzerland believe they are on the cusp of creating the first, fully functional, artificial human brain. The Blue Brain Project was launched in 2005 by a group of scientists in Switzerland who hope to “reverse engineer” the human brain.

So far the Blue Brain Project has already successfully simulated the elements of a rat brain, however Henry Markram, director of the Blue Brain Project, is confident that his team should now focus all their attention on the human brain, as opposed to recreating the brains of other animals. “It is not impossible to build a human brain and we can do it in 10 years,” exclaimed Markram.

Markram and other scientists have focused on the neocortex of the brain. The neocortex is made up of thousands of neurons which contribute to the higher functions of the brain, such as communication, sensory perception, reasoning, and motor skills.

The project now has a software model of “tens of thousands” of neurons – each one of which is different – which has allowed them to digitally construct an artificial neocortical column. Although each neuron is unique, the team has found the patterns of circuitry in different brains have common patterns.

“Even though your brain may be smaller, bigger, may have different morphologies of neurons – we do actually share the same fabric,” [Markram] said. “And we think this is species specific, which could explain why we can’t communicate across species.”

To recreate the human brain model, Markram and his team use the IBM Blue Gene Machine, which has 10,000 processors (one processors for each neuron of the brain).


The Future of Printing is 3D

Courtesy of Dimension Printing (UK)

Courtesy of Dimension Printing (UK)

At this year’s annual ASEE Conference in Austin, one of the main topics of conversation started with the question, “have you seen the 3D printer?”. The company Stratasys, Inc. has created their Dimension 3D Printers. Their latest innovation is their line of uPrint machines, which are less costly (prices starting at $14,900) and are small enough to keep in your home or office. The 3D Printers are able to create “functional 3D models from the bottom up, one layer at a time with tough, durable acrylonitrile butadiene styrene (ABS) plastic.”

Jesse Roitenberg, the representative from Stratasys at the conference, explained the benefits of using 3D printing as opposed to building models by hand:

“With a 3D printer, you are actually able to create an object as you had designed it. Once the object is created, the designer is then able to hold, test and verify the design. The object created is more accurate and the process is less time consuming.”

Roitenberg had a display of a variety of objects created by the 3D Printers including a replicated alligator skull, a working wrench, a small jewelry box, and just for fun, a figurine of the character Yoda from Star Wars. “You know all engineers love Star Wars, so once they see Yoda, they ask when the uPrint can be shipped to their house,” jokes Roitenberg.

Image taken at 2009 Annual ASEE Conference

Image taken at 2009 Annual ASEE Conference

The uPrint machines are able to print up to one cubic inch per hour. The ABS plastic is used to create each layer of the designed object. Stratasys, Inc. offers an explanation on how the process works:

STL files are imported into Catalyst® EX Software which automatically slices and orients the parts and creates any necessary support structures. The software automatically plots a precise deposition path for Dimension to follow. ABS plastic (in filament form within auto-loading cartridges) is fed into an extrusion head, heated to a semi-liquid state and accurately deposited in layers as fine as 0.007-inch (0.178 mm) thick. After completion of the build, support structures are simply removed.
ABS plastic is heated to a semi-liquid state and deposited in thin layers by a patented extrusion head.
Catalyst software automatically determines when and where to deposit ABS or support material throughout the build process.

ABS is considered a strong material and is offered in a variety of colors for the uPrint machines.

The Dimension 3D printers have been used in both educational facilities and the workplace, benefiting everyone from engineers to middle school science teachers. Below is a video of Jay Leno explaining how he was able to use the 3D printer to recreate an old steam engine car part. On the Dimension Printers website, Statasys will send a sample part as well as more information about the uPrint machines if requested (*no 3D glasses required*).


Rice Concrete Cuts Greenhouse Emissions

Rice Concrete Cuts Greenhouse Emissions

A new way of processing rice husks for use in concrete could lead to a boom in green construction.

Rice husks form small cases around edible kernels of rice and are rich in silicon dioxide (SiO2), an essential ingredient in concrete. Scientists have recognized the potential value of rice husks as a building material for decades, but past attempts to burn it produced an ash too contaminated with carbon to be useful as a cement substitute.

Now, Rajan Vempati of ChK Group, Inc. in Plano, Texas, and a team of researchers have figured out a way to make nearly carbon-free rice husk ash. Heating husks to 800 degrees centigrade (1,472 degrees Fahrenheit) in an oxygen-free furnace drives off carbon, leaving fine particles of nearly pure silica behind.

“The process emits some CO2, but it’s carbon neutral. Any that we emit goes back annually into the rice paddies,” Vempati said.

Related: Engineering Fly Ash BricksSandwich Brick, Reusing Waste MaterialTX Active CementUW-Madison Wins 4th Concrete Canoe Competition


University of Wisconsin Engineering Education Improvements

Joel Dresang of the Journal Sentinel explores the attempts by the University of Wisconsin to improve engineering education in Engineering Interest:

As industries and societies around the world face mind-boggling challenges involving such matters as infrastructure, medicine, information technology and energy, engineers are the workers trained to apply scientific knowledge to practical solutions, says Peercy, UW’s engineering dean.

The need for engineers is acute. They’re perennially on the most-wanted list in Manpower Inc.’s talent shortage surveys. Federal stimulus spending in such areas as energy technology and infrastructure should increase demand, Peercy said, and competition from emerging economies such as China and India is accelerating.

“We are so short on engineers in some disciplines in this country that my colleagues from industry in this country are telling me that they have to relocate offshore to get the workforce they need,” Peercy said in an interview.

The UW System Board of Regents approved an extra tuition charge of $700 a semester for engineering students to help the college offset higher costs of engineering instruction and to beef up staffing and enrollment. Peercy told the regents he’d boost undergraduate enrollment by 20% in five years. Already, in the first year, enrollment is up almost 8%, to 3,450 from 3,200.

Retooling curriculum: the college is integrating disciplines and broadening students’ exposure to other fields through team-teaching and more common coursework. It’s stressing experiential learning and entrepreneurial thinking through hands-on projects, competitions and student organizations such as Engineers Without Borders. It’s fostering more teamwork and communication.

Related: Duderstadt Urges Revolution in Engineering EducationWilliam Wulf Webcast: Engineering Education in the 21st CenturyEngineering Education at Smith CollegeIllinois and Olin Aim to Transform Engineering EducationPrinceton Engineering School Targets Societal Needs


Search on this site:


Categories:

Links:

Tags:

appropriate technology ASEE career Civil Engineering Computer Science design Diversity Do-it-yourself economics Education Electrical Engineering energy engineering engineering education engineering projects engineers Engineers Without Boarders Environmental Engineering Envirotech fellowships funding Future green engineering How Things Work Innovation internet k-12 making a difference managing engineers materials engineering mechanical engineering NSF project management Research robots science science literacy Society technology The Economy The National Interest university webcast women workplace
  • Archives: