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Real Life Debugged » 2007 » April

Archive for ◊ April, 2007 ◊

Ever get stuck, not knowing how to fix a hand-held calculator or cell phone? Then check out a new book by Lisa Simone, PhD, of Bridgewater, an assistant professor, at New Jersey Institute of Technology (NJIT).

If I Only Changed the Software, Why Is the Phone on Fire? (Elsevier, 2007) offers step-by-step, easy-to-understand information about how to debug small and large electronic products ranging from pocket calculators to cell phones.

“Debugging is the process of removing bugs and problems from software and devices,” said Simone. “It is a valuable skill for anyone working in a technical field like engineering. Unfortunately, it is difficult to teach debugging, and most people have to learn through experience, which can be time consuming and frustrating.”

The book introduces readers to real-world technical mysteries of progressive complexity, guiding them toward successful solutions. Simone hopes the audience will be for the general public as well as engineers. “I’ve created a fictional company with a cast of engineers. The engineers tackle real-life software and hardware technical problems while upper management and customers hover nervously.

The book shows engineers faced with technical mysteries and products behaving badly. In one instance, a new software engineer uses a newly-developed monitor to measure her own heart-rate. To her surprise, her heart-rate has mysteriously doubled. She and a senior colleague brainstorm to find the bug. Eventually, by eliminating hardware and software parts, they fix the monitor. The book’s final chapter offers a summary of smart debugging techniques introduced throughout the text.

Simone’s idea for the book grew from realizing while working in industry that students, developers, computer scientists and engineers often don’t know how to solve problems.

At NJIT, Simone is developing a portable low-cost glove for functional hand measures that can be worn by victims of stroke or traumatic brain injury. The National Institutes of Health is funding the research. The device will help researchers, physicians and therapists assess the degree of injury and methods that might help patients regain mobility. Other current projects also focus on using wearable embedded systems and technology to help rehabilitate people with physical disabilities. Simone’s research has been published in six peer-reviewed journals and she has presented at 13 prominent conferences. She received her PhD in biomedical engineering from Rutgers University.

The Press Release can be found here.

For students, Lisa Simone is a dream professor.

She uses the latest technology to teach her classes and her students work in teams on hands-on projects. She arrived for a recent class, for instance, carrying bags of ice, lighters and heat guns, which she used to help her students design devices for temperature detection.

In another of her classes, students use LEGO Mindstorm kits to build robots that perform simulated surgeries. The class meets in a biomedical engineering studio where students work together on interactive projects.

Simone is young, friendly and adventurous. Her idea of fun is to frolic underwater with a school of sharks. She’s an avid scuba diver who has traveled the world photographing marine life. Sneaking up on napping sharks and snapping their photographs gives her great joy. Photographs of marine life adorn her office wall.

She is also a writer. She’s just written a new book — a high-tech thriller in which software engineers act like detectives, forever on the hunt for bugs: software bugs that can cause computer-based products to crash and burn.

The book — If I Only Changed the Software, Why Is the Phone on Fire?– teaches students and readers how to contend with software bugs.

Software engineering is a subject Simone knows well.

Before coming to NJIT in 2006, she worked as an embedded-systems engineer for Lucent Technologies and Motorola. She led teams of engineers who worked on innovative cell-phone technology. Her teaching is informed by real-world experience and she treats her students as if they were actual engineers developing cutting-edge technology.

In the below interview, Simone discusses her teaching, her book, her research projects as well as main passion in life: scuba diving.

Why did you write a mystery novel about problem solving, embedded systems and debugging?

I didn’t want to write a boring textbook about debugging. Instead, I wanted to make the learning fun, so I decided to use mysteries to teach problem-solving skills. Since most people learn debugging through experience and since people like mysteries and stories, I created a fictional engineering company with engineers who have to combat a series of 10 technical mysteries - kind of like CSI or Law and Order for engineers. The company has a cast of new and seasoned engineers, and the book is filled with machines that crash and a phone that catches fire.

My goal is to tease the reader with a series of symptoms, clues, and realistic bugs and provide logical steps to help the reader learn what could be wrong with the software and hardware. The book includes many common types of software bugs, and introduces both traditional and nontraditional debugging methods and testing. Students need to understand that problem solving is a logical process that isn’t that difficult to learn.

I based the mysteries on my actual experiences, and I hope the book will help students and people working in the field gain experience debugging code. I’ve started to use the book in my graduate class, Intro to Embedded Systems, and the students say they like it.

Tell us about the engineers in the book, and why readers might like to read about engineers solving technical mysteries?

I wrote the book to be fun. I’ve tried to make it as realistic as possible, from the way problems are found and reported to the engineers, to the way managers tend to react, which is “this must be fixed today.” The Hudson Technologies engineers — Oscar, Josie, Ravi, and Li Mei — are a fairly typical engineering team: they have flashes of inspiration and at other times bang their sleepless heads on the bench. They feel pressure to nail the bugs amid sometimes frustrating team dynamics, missing tools, some difficult customers and a stressful trade show demonstration. I want readers to identify with the characters so they understand what it’s like to work in industry.

Why is it important for students to know about debugging software and embedded systems?

Most people don’t know what an embedded system is, even though they own dozens of them! An embedded product is anything with smarts - with a computer or microprocessor embedded inside - like a cell phone, a remote control, an iPod, or even in once humble products like toasters. Since more and more of these devices have software in them, they often have bugs which can be challenging to figure out. Software errors are estimated to cost the U.S. economy $60 billion a year. Software bugs in medical devices have killed patients. Student engineers who will design, build, or test smart products will face debugging challenges. Effective problem- solving skills will make a student a valuable asset to any company.

How do you expect readers to use this book?

The book can be enjoyed in a number of ways; it was written for folks of all experience levels from students and new engineers to seasoned technologists. Each mystery provides a “Day in the Life” for folks curious about working in industry. Each mystery stands alone, although the Hudson team is the thread that weaves the stories together. In my preface to the book, I invite readers to write in the margins and work through the examples to solve the mysteries before the team at Hudson Technologies does. Or, just glide along with the team as they tackle one technical mystery after another.

I hope that readers get caught up in the mysteries and that the team’s tricks come floating back out when readers find a similar bug or symptom in their own technical travels. I also included an appendix with a nice summary of bugs and tricks in each mystery.

How long did it take you to write the book?

The book took about 18 months to write part-time, in two chunks. I started the project around 2002 but got busy with research, and a few years later picked it back up again when I joined NJIT. From the beginning, I had created a very detailed outline of each mystery. I am an extremely driven and organized individual, so when it came time to actually write the book I just filled in the blanks.

I loved writing the book! There were some stressful times, such as when I had to produce the three final chapters in about 6 weeks before classes started last fall, but also some wonderful times writing at my kitchen table with a cat on my lap, a few writing marathons in Florida, and a productive stretch at a sidewalk café in Chicago that had free wireless access, a supportive manager, and great beer.

What was your biggest challenge in writing this book?

The biggest challenge was to make the technical mysteries realistic and fun for readers of all experience levels. Real-life engineering problems and believable people. Thanks to my father I am a good technical writer, but this was my first big foray into fiction. I am an avid reader and I found that plot and dialog came pretty easily, but my biggest challenge was perspective or point-of-view. Normally a book is written from one person’s point of view - you’re in their head - you hear what they think and see what they see. But I wanted to get into the heads of all of my fictional engineers so my readers could identify with each. I ended up taking a chance and changing point of view multiple times in each mystery, so each of the team members is a main character at different times. Hopefully now my readers can identify with at least one of the characters to make the mysteries more realistic.

How do you like teaching biomedical engineering at NJIT?

I love it. I run the Capstone Design Program for seniors who are biomedical engineering majors. I’ve been able to redesign that program and make it much more rigorous, project driven and applicable to the real world. I’ve worked in industry for years, and I treat the seniors as if they are engineers in my big engineering design firm. I teach them how to design for the real world, including all the real-life experiences working with difficult customers, writing documentation, submitting invention disclosures and performance reviews. Stuff they don’t expect to learn in college.

You teach several engineering classes and do research at the same time: isn’t this challenging?

Research is challenging but also rewarding, especially in medicine and rehabilitation, so I will always try to balance research and teaching. The people who participate in my studies have suffered brain injuries, but they are excited to help my team develop new methods and therapies, even if those discoveries don’t help them directly. Their enthusiasm is inspirational and one of my subjects emphatically told me he would do anything to help my research efforts: “You can paint me pink and stick me to the ceiling,” he said, “if it helps someone else who has a stroke.”

Tell us about your research projects at NJIT?

I have some neat research projects, and I have five master’s students who are assisting me and I love working with them. In my lab, we design low-cost systems to treat patients with movement disorders that happen after a brain injury, such as a stroke or traumatic brain injury. With funding from the National Institutes of Health, I’m developing a wearable sensor device for the hand called the Shadow Monitor; it helps understand how people use their hands after an injury. Why is this useful? Doctors and researchers know patients with the above injuries often struggle with daily tasks like dressing and eating, but we don’t have good tools to measure and find out which therapies help them the most. With our device, we can observe hand use over 24 hours, and evaluate how well rehabilitation is helping patients regain their hand functions.

We’ve also combined Second Life, the online 3D interactive world, with the Wii Remote game controller, to create a low-cost virtual reality game that patients can use to regain control of their arms.

You are a scuba diving instructor who travels the world photographing underwater shipwrecks and marine life, including some potentially menacing ones, like sharks?

I love scuba diving because when you are underwater there is not enough room in your brain for the stress of daily life. Your senses are overwhelmed with the sea and its bountiful life. We’re the outsiders underwater, but brave sea creatures will check us out if we respect them. Once while diving, I happened upon a baby octopus. I stuck out my finger. He wrapped a tentacle around it and tugged. I suspect he was assessing how big of a threat I presented. After a few tugs, he must have suddenly realized I was larger than he thought and instantly zipped away. I have danced under water with sea lions, twirling around as they tugged on my camera and fins. After nearly 30 exhausting minutes of tumbling play - we humans are much less graceful underwater than they are — I was rewarded with a sea lion kiss. Brave and curious sea turtles have stared me down for a moment, and swam off. Swimming through huge schools of barracuda, salemas and jacks — thousands of fish swimming in a tight ball — makes you feel insignificant.

One of my favorite dive sites is Truk Lagoon near Guam, the site of many WWII shipwrecks. The wrecks are full of supplies, ammo, tanks, torpedoes and small airplanes. (Our dive master told us, “be careful not to bang your dive gear on the torpedoes - they are still live.”) On the Fujikawa Maru, I swam down through the engine room, out of the hull and right through a torpedo hole - the one that had sunk the ship. The shipwrecks are wonderful to explore, but you can’t help feeling sad for the soldiers who died.

And yes, I like sharks. Sharks are pretty cool - I sneak up on white tips and nurse sharks to snap pictures as they sleep - the best shots are right after they wake up! Shark feedings in Fiji and Tahiti can get frenzied, and we’ve collected sharks teeth afterwards. While diving in the Galapagos Islands, I have swum beside massive 40-foot whale sharks and their 15-foot long babies. One of my shark adventures I still can’t tell my mother about. It started with a few silky sharks (they’re like the trouble-making teenagers hanging out on the corner), but evolved into a circle of 35 sharks - with me and another diver in the middle. That’s the only time I’ve ever wondered if they can smell fear through a wetsuit…

(By Robert Flordia, University Web Services)
Read the rest of the interview here.

Phone on Fire Newsletter, Issue 9
Friday, April 06th, 2007 | Author: lisaksimone


I am returning from the 2007 Embedded Systems Conference in San Jose and the official premiere of Phone on Fire! If you are in the field and have never been to an Embedded conference - you need to go. What a great collection of vendors, classes, and seminars! (Ed Note: I would include a static website for the conferences in general, but it changes every year. So, check out the Embedded Systems website, which always has great information including ALL the embedded systems conferences.)

In this newsletter -
- Highlights the Show,
- Phone on Fire Premiere,
- My Best Takeout Pizza Experience,
- Shameless Photos.


Book Premiere

Author with Dave, an interested reader at the Embedded Systems Conference

I’m here at the Embedded Systems Conference in San Jose and the official premiere of Phone on Fire! If you are in the field and have never been to an Embedded conference - you need to go. What a great collection of vendors, classes, and seminars!

The Phone on Fire book signing was a great success - it was the top-selling book in the Elsevier booth. I met several great people who were surprised and intrigued by the idea of using a mystery format to teach debugging skills. I was also surprised to learn that Phone on Fire is Elsevier’s first book of fiction! Lisa and an interested reader, Dave, and the Elsevier Booth. more…

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