Friday, September 7, 2007

The high-tech savvy


24 hours news .


education era


Students at Hamilton's McMaster University can hear the first lecture of the year for introductory psychology this week without going anywhere near a classroom.


In a break with tradition, the course's main lectures will be prerecorded and posted on the Web, available for students to watch when they have a free half hour and an Internet connection.


The online lectures, on topics such as colour perception and sexual motivation, are available only to students and, to ward off procrastination, are posted for a limited time. They include interactive slides, practice quizzes and a search function.


Students can pause or rewind, join chat groups or e-mail questions.


"I want them to think psychology is cool," says the course's creator, Professor Joe Kim.


"The old lecture model, that is what we are used to, but in a large hall it is not the most satisfying experience."


Prof. Kim, 35, has spent long hours this summer redesigning a course which, with upward of 3,000 students, is easily the largest on campus. He's already recorded all 13 of his fall lectures in a studio, with the help of a homemade teleprompter and a sizable support crew.


Such online, on-demand instruction is a far cry from the standard lecture format, and it's the latest development in a long line of changes in the classroom.


Higher education is becoming increasingly high-tech as professors look for ways to engage a generation raised on the Internet and video games.


The burgeoning use of technology also raises questions about the nature of university education, as schools use it to cope with growing class sizes and limited resources.


The only required face-to-face contact at the McMaster course, for instance, are tutorial groups of 40 to 45 students led by third- or fourth-year undergraduates that meet twice a week.


Is the tech wave a way to enhance education, or simply to make do with less?


"This generation of students, they expect teachers to be more than a talking head," says Veselin Jungic, a math professor at Simon Fraser University in Burnaby.


Prof. Jungic says he has overhauled his teaching style since he came to Canada from his native Bosnia. Along the way, he also has created a superhero - Math Girl - and two animated short films to help explain difficult concepts to his first-year calculus class.


The early morning introductory course is likely the hardest thing his students will face during their fall term, so he created the cartoons - available on YouTube by searching Math Girl - as an unthreatening way to introduce difficult topics, he says.


"At 8:30, you make 500 people laugh. That is a good start. That creates a chance for a teacher to reach those students," he explains.


After showing the cartoon, he spends his lecture discussing the concept and then finishes by playing the cartoon again.


Preliminary studies show that students who watch the cartoons - inspired by a former top student - have a better grasp on the material. "There is something, I call it magic, in that pop culture. It really reaches young people," Prof. Jungic says.


He is working on his third instalment with local artist Lou Crockett, which will focus on pi.


Across the country, professors are experimenting with other approaches to get their messages across.


Many are putting lectures on podcasts for students to listen to at their leisure. A handful have gone one step further than Prof. Kim at McMaster and are using video podcasting, offering all their lectures and course material online without any face-to-face meetings.


Others have introduced "clickers" in the classroom that allow them to poll students as a way of increasing interaction in large lecture halls. At the University of British Columbia, technology is being used to increase student feedback, with the rollout of online professor-evaluation forms.


Julia Christensen Hughes, head of the business department at the University of Guelph and a long-time champion of improving teaching practices, applauds these attempts to enrich the old lecture model.


"The classroom should be a value-added experience. It should not be just a straight transmission of information," she says.


At the same time, she cautions that "technology is not a panacea" and cannot be a substitute for face-to-face contact. "For me, learning is a social activity."


At McMaster, Prof. Kim agrees. In addition to his online lectures, he plans to give optional "live" talks on special topics.


He also plans to spice up his online offerings with hidden features that his students can discover and game shows involving students and tutorial assistants from the course. He's thinking he'll model it after Who Wants to Be a Millionaire.


He says given the number of students who enroll in his course, teaching in person would mean cramming thousands of them into a large lecture hall.


In past years, students in the course went to tutorials and watched a videotape of the lecture. This new format allows more time for discussion in class and forces them to become involved as they listen, he says.


While most of the personal instruction will come from undergraduates, Prof. Kim says his new job is designed with an emphasis on teaching, and the majority of his time will be devoted to this course.


He will be dropping in on tutorials, he says, and holding regular office hours if students prefer to ask questions in person.


Finally, as a professor of psychology, he's hoping to use the new course design to study how this new generation of students learns. The real test, he says, will be whether the combination of interactive, online learning and small group meetings will allow students to take in difficult concepts more easily.


"I'll be watching how they perform," he says.


CALCULUS SUPERHERO


How does a math professor create a cartoon superhero?


Veselin Jungic says he got the idea from watching the way his two sons, now grown, were captivated by characters in pop culture. "These superhero characters, they are able to bring a message to young people," said Prof. Jungic, 52, in English that carries the accent of his native Bosnia.


He started thinking that he could use a superhero to turn learning calculus into a positive experience for his first-year students. One day in 2003, as he handed back mid-term tests to students, he found his inspiration. Only one student got 100 per cent and, when he asked her to stand up, he saw a tiny young woman reluctantly rise in the large lecture hall. "That was my math girl," he said.


Prof. Jungic says he still has lots to learn about being a writer. The cartoons, filled with formulas and complicated concepts, are not likely to make it into a Saturday morning time slot. Still, there have been refinements. The first Math Girl episode, for example, didn't have a villain, but one was created for the sequel at the advice of his students. Prof. Jungic says he also has gained inspiration from old episodes of the Batman television series and predicts Math Girl 3, now in production, will be his best yet.


"I am just warming up,"


Cool tools


The latest crop of university students share many characteristics that professors can use to improve the teaching experience, says University of Guelph professor Julia Christensen Hughes. They are generally tech-savvy, are comfortable communicating online and are more willing to learn through trial and error than their parents.


"When they get a new piece of technology," she said, "they aren't going to look at the manual."


The same goes for the wave of young professors arriving on Canadian campuses. But just because technology is available doesn't mean every learning experience needs lots of bells and whistles, Prof. Christensen Hughes says. Posing questions and encouraging discussion is also a great way to foster different kinds of learning, she says.


"Some students find it very refreshing to go into a course without PowerPoint because it is a break," she said.


The trick, she believes, is to offer students a variety of learning options so that they can pick the style that works for them.


Some of the techniques now being used include:


Course websites: There are lots of developments on this front as websites evolve from a source of general information such as lecture outlines and assignment schedules to interactive hubs with discussion groups, professor blogs and links to journal articles or other sources.


Podcasts: Making lectures available in MP3 format is becoming a popular feature of many courses. The option means students can catch up on a missed class, review material at exam time or go over difficult concepts at their own pace. Many podcasts are also available to the general public. But some scholars worry students will forgo class altogether and just listen online.


Video podcasts: A few professors have gone one step further and created recordings with pictures and text that can be downloaded onto computers, MP3 players or even video-game consoles. They also allow students to review material and go at their own pace, but also provide charts, slides, video and other features for students who are visual learners.




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Intel Socket Xeon 7300 quad-core processor-


24 hours news. Santa Clara, Calif.-based Intel Corp. officially announced its new four-socket, quad-core Xeon 7300 Series this week, code-named Tigerton -- just five days before Advanced Micro Devices Inc. (AMD)'s quad-core processor Barcelona is to be introduced.


Compared with the company's previous-generation four-socket, dual-core products, the new quad-core Xeon 7300 series processors pack more than twice the performance and more than three times the performance per watt - and at the same price, Intel says. The Xeon 7300 completes Intel's transition to Core microarchitecture, a move that Intel first announced in June 2006.


Intel's consolidation mission
Intel is pushing users to move away from the phased-out single-core processors onto the quad-core platform, saying the Intel Xeon 7300 is designed for server consolidation. It has four times the memory capacity of the previous generation: a four-socket, dual-core code-named Tulsa.


"We are not charging a premium for quad-core, so all of our dual-core processor pricing is replaced with quad-core prices," said Kirk Skaugen, Intel vice president and general manager of the Server Products Group. "We've eliminated every reason not to go to quad core. Many [users] have single-core servers that are utilized only 15% to 20%. Now we have a platform with five times the performance of single core, so you can take dozens of underutilized systems, create virtual partitions and increase utilization dramatically."


The more energy-efficient Xeon 7300 series includes frequencies up to 2.93 GHz at 130 watts; several 80-watt processors; as well as a 50-watt version, or 12.5 watts per core, with a frequency of 1.86 GHz for ultradense deployments, such as four-socket blade servers.


It's also possible to upgrade the Xeon 7300 to Intel's next-generation chips. Code-named Dunnington, the 45-nanometer (nm) processor with four or more cores is due out next year, Skaugen said. In mid-2008, Intel plans to ship its Nehalem family of processors, which will include one to eight cores per product. In 2009, Intel plans to introduce its 32-nm manufacturing process.


In addition, the Xeon 7300 includes a new Data Traffic Optimizations feature that enhances data movement between processors, memory and I/O connections, Intel said. While previously an interconnect was shared, each processor will now have its own interconnect, Skaugen said.


The previously announced Intel VT FlexMigration will assist in the seamless upgrade of virtual machines to Intel's next-generation 45-nm Core microarchitecture-based platforms.
VMware Inc. of Palo Alto, Calif., and Intel worked together to optimize VMware ESX Server on the Xeon 7300 for live migration with VMotion between Intel processor families. This means users with Intel Xeon processors can perform live migrations of virtual machines to servers with future-generation Intel processors.


Users won't be able to do live migrations between AMD and Intel-based servers, however.


AMD's two cents on Tigerton
When AMD of Sunnyvale, Calif., releases its first quad-core processor next week, the two-, four- and eight-socket versions of the chip, code-named Barcelona, will surpass performance of Intel's Xeon quad-core processor line.
"Tigerton has the unfortunate distinction of being near last in a line of a dying architecture based on a front-side bus bottleneck," said Bruce Shaw, director of server and workstation product marketing. "Nowhere are the limitations of a front-side bus architecture more keenly felt than in the high-end multiprocessor server market. So while Intel may publicly 'celebrate' the arrival of Tigerton, it is in fact the final inadequate attempt by Intel to make the front-side bus architecture scale."


AMD's quad-core processor will be on one die, making it the first "native" quad-core processor. Intel's quad-core processors are two dual cores stuck together.


"Tigerton is still a dual-core processor design, just as Penryn will be, said AMD's Shaw. "To achieve full-performance scaling on real-world multithreaded workloads, real design work is needed. Packaging dual-cores together into quad cores is insufficient, as Intel itself clearly understands. Why else transition to native quad core in late 2008?"


Intel spokesperson Nick Knupffer said Intel's Xeon quad-core processor performance is the same as if it were on a single piece of silicon. He did not confirm any plans to move to a single die in the future.


"We are interested in end-user performance, and we are proud of the performance we have been delivering," Knupffer said.


Since November 2006, Intel has introduced more than 20 quad-core processors in the server and desktop market segments.


Vendors add servers designed for Xeon 7300
Starting today, servers based on the Xeon 7300 series processors are available from more than 50 system manufacturers, including Dell Inc., Egenera Inc., Fujitsu, Fujitsu Siemens, Hitachi, IBM Corp., NEC Corp., Sun Microsystems Inc., Super Micro Computer Inc., and Unisys Corp.
Today, for example, Hewlett-Packard Co. announced its enhanced lineup of multiprocessor-based server systems based on the Xeon 7300.


The rack-based HP ProLiant DL580 G5 server and the HP ProLiant BL680c G5, HP's first four-processor, quad-core server blade, offer increased performance with double the number of processor cores.


Pricing for the new Intel Xeon quad-core processors depends on the speed, features and volume ordered, and cost ranges from $856 to $2,301 in quantities of 1,000. For additional details on the performance characteristics of the quad-core Intel Xeon 7300 series, visit Intel's Web site.




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