Almost a year ago you had a chance to ask professor Kevin Fu about medical device security. A number of events (including the collapse of his house) conspired to delay the answering of those questions. Professor Fu has finally found respite from calamity, coincidentally at a time when the FDA has issued guidance on the security of medical devices. Below you'll find his answers to your old but not forgotten questions.

An anonymous reader writes "Patrick Lin of California Polytechnic State University explores one of the ethical problems autonomous car developers are going to have to solve: crash prioritization. He posits this scenario: suppose an autonomous car determines a crash is unavoidable, but has the option of swerving right into a small car with few safety features or swerving left into a heavier car that's more structurally sound. Do the people programming the car have it intentionally crash into the vehicle less likely to crumple? It might make more sense, and lead to fewer fatalities — but it sure wouldn't feel that way to the people in the car that got hit. He says, '[W]hile human drivers may be forgiven for making a poor split-second reaction – for instance, crashing into a Pinto that's prone to explode, instead of a more stable object – robot cars won't enjoy that freedom. Programmers have all the time in the world to get it right. It's the difference between premeditated murder and involuntary manslaughter.' We could somewhat randomize outcomes, but that would lead to generate just as much trouble. Lin adds, 'The larger challenge, though, isn't thinking through ethical dilemmas. It's also about setting accurate expectations with users and the general public who might find themselves surprised in bad ways by autonomous cars. Whatever answer to an ethical dilemma the car industry might lean towards will not be satisfying to everyone.'"

A while ago you had a chance to ask John McAfee about his past, politics, and what he has planned for the future. As usual, John answered with extreme frankness, with some interesting advice for anyone stuck at a checkpoint in the third world. Below you can read all his answers to your questions.

New submitter mjone13 writes "Dave Feldman, in a blog posts, says that the problem Android faces is giving consumers too much choice. He cites several studies which state that consumers generally are unhappier when they have too much choice. 'Catering to all individual preferences creates a bloated, bland product. Not to mention a UI that’s impossible to navigate. Furthermore, people are notoriously bad at identifying what we want. And what we do want is influenced heavily by what we know — our expectations are constrained by our experience.' He then goes on to talk about Android fragmentation, app developer problems and bug issues. Finally he says the people who general prefer the choice Android provides are tinkers similar to gear heads who love tinkering with their car. 'I think many who extol Android’s flexibility fall into the tinkerer category, including some tech bloggers. They love all the ways they can customize their phones, not because they’re seeking some perfect setup, but because they can swap in a new launcher every week. That’s fun for them; but they’ve made the mistake of not understanding how their motivation differs from the rest of us.' Is choice really a problem for Android?" Whether it's a problem depends on what the goals are. Providing a satisfying experience to a bunch of tinkerers is a very different thing from providing a satisfying experience to the multitude of non-tinkerers who buy smartphones.

Last week you had the chance to ask software designer and international man on the run John McAfee about his exploits in business, programming, and the jungle. Mr. McAfee provided some extraordinarily entertaining and frank answers to your questions. Read below and enjoy.

A while ago you had the chance to ask Bruce Perens about how open source has changed in the past 15 years, what's happening now, and what's to come. Bruce has been busy traveling, but he's found some free time and sent in his answers. Read below to see what he has to say.

MassDosage writes "Having developed software for nearly fifteen years, I remember the dark days before testing was all the rage and the large number of bugs that had to be arduously found and fixed manually. The next step was nervously releasing the code without the safety net of a test bed and having no idea if one had introduced regressions or new bugs. When I first came across unit testing I ardently embraced it and am a huge fan of testing of various forms — from automated to smoke tests to performance and load tests to end user and exploratory testing. So it was with much enthusiasm that I picked up How Google Tests Software — written by some of the big names in testing at Google. I was hoping it would give me fresh insights into testing software at "Google Scale" as promised on the back cover, hopefully coupled with some innovative new techniques and tips. While partially succeeding on these fronts, the book as a whole didn't quite live up to my expectations and feels like a missed opportunity." Read below for the rest of MassDosage's review.

jkauzlar writes "The standard Oracle JVM has about sixty 'developer' (-XX) options which are directly related to performance monitoring or tuning. With names such as 'UseMPSS' or 'AllocatePrefetchStyle', it's clear that Joe Schmo Code Monkey was not meant to be touching them, at least until he/she learned how the forbidding inner recesses of the JVM work, particularly the garbage collectors and 'just-in-time' compiler. This dense, 600-page book will not only explain these developer options and the underlying JVM technology, but discusses performance, profiling, benchmarking and related tools in surprising breadth and detail. Not all developers will gain from this knowledge and a few will surrender to the book's side-effect of being an insomnia treatment, but for those responsible for maintaining production software, this will be essential reading and a useful long-term reference." Keep reading for the rest of jkauzlar's review.

Last week, you asked questions of "father of the Internet" Vint Cerf; read on below for Cerf's thoughts on the present and future of IPv6, standards and nomenclature, the origin of his beard, and more. Thanks, Vint!

I wasn't sure what to expect from the new X-Men: First Class movie. The previous 3 films have been riddled with ups and downs. What I didn't realize is that this film was going to really be a Prequel. I thought it was going to be a bit more of a reboot, but it still tries to fit in with the previous films. Read on for a brief review which will contain some spoilers. You have been warned!

RickJWagner writes "20 percent inert ingredients, 80 percent nitro glycerin. That's how I'd describe JBoss AS 5 Performance Tuning from Packt. The first 50 pages are nothing to get excited about. This first chapter and a half describes the author's performance tuning life cycle methodology and introduces us to a handful of open source tools that can assist us in our tuning efforts. The tools section seems especially weak-- there are plenty of screenshots showing the tool's menu screens, something you'd normally pick up in about a minute from the tool's distribution website. Honestly, at this point I was beginning to wonder if this book was going to live up to my expectations. Luckily I pressed on for a few more pages, and hit the rich paydirt that makes up the rest of the book. From that point on, every section yielded valuable tuning advice." Keep reading for the rest of Rick's review.

Champions Online is Cryptic Studios' latest entry into the Superhero MMORPG genre, representing several years of advancement in game design both for Cryptic and for MMOs as a whole. It's no longer a new field, and there are now certain expectations about what an MMO should contain, and how it should play. Two major factors to a new game's success or failure are the standards they embrace and do well, and the ones they reject and do differently. Champions Online succeeds at adapting many established concepts, while still setting themselves apart from the typical swords & sorcery backdrop. Read on for the rest of my thoughts.

The first projector I remember seeing in person had three great big glass eyes (for red, green, and blue lamps) and BNC connectors. It probably weighed more than 100 pounds, and had to be carefully calibrated to align the lenses. Now, I've got a projector above my head that weighs less than a Neal Stephenson novel and has a sharper, brighter image than that monster. I've been looking into LED projectors for a few years now; in that time, I've been waiting for them to come down in price and bump up in lumens. So I was very curious about BenQ's GP1 LED projector (also known, somewhat oddly, as "Joybee"), and was happy to get a sample for review. It may seem retrograde to bother with an 800x600, 100 lumen (no missing zero there: one-hundred lumen) projector in 2009 A.D., but for the past four weeks, I've used it as my primary display, and come out happy. It has some drawbacks, but it's an impressive little device for its $499 pricetag, and I hope a harbinger of even better things to come. Read on for my take on what BenQ got right, and what rough spots stick out.

First-person shooters comprise one of the most well-developed video game genres in existence. The number of high-quality games and franchises practically demands that any new entry must have an interesting concept and a rock-solid engine. Otherwise, it will quickly get buried under an avalanche of award-winning titles. When the original F.E.A.R. came out in 2005, a well-crafted horror theme, the AI, and a few gameplay innovations allowed it to succeed despite direct competition from established franchises, such as Quake 4 and Call of Duty 2, among others. F.E.A.R. 2: Project Origin draws on the strengths of its predecessor and adds a few improvements. The question that now remains is whether or not the additions make up for the fact that the game's concept is no longer new and unique. Read on for the rest of my thoughts.

liraz writes "Stuart Cohen, former CEO of Open Source Development Labs, has written an op-ed on BusinessWeek claiming that the traditional open source business model, which relies solely on support and service revenue streams, is failing to meet the expectations of investors. He discusses the 'great paradox' of the FOSS business model, saying: 'For anyone who hasn't been paying attention to the software industry lately, I have some bad news. The open source business model is broken. Open source code is generally great code, not requiring much support. So open source companies that rely on support and service alone are not long for this world.' Cohen goes on to outline the beginnings of a business model that can work for FOSS going forward."

prostoalex writes "Most companies would call themselves innovative and would claim they're delivering an above-average service to their customers. Yet, their customers opinions might differ. If you drill a company on their innovation practices, they would probably mention two approaches they employ: 1. Their research department meets with target groups, compiles presentations for the upper management, which then occasionally hands those reports over to the development department. 2. Their research or marketing department comes up with competitive matrix of the products available from competition. In a meeting then, executives see that their product is missing a feature, and hence the development department is assigned the task of adding 'an Internet-enabled installer' to the product, since everybody else offers them, thereby creating market expectations." Read on for the rest of Alex's review.

From a certain point of view, Halo 3 is without a doubt the biggest game of the year. The combination of fan anticipation, marketing, and the skill of Bungie's design combine to create a game that's larger than life; if gaming has a blockbuster franchise to match the movie industry's punch, it's the tale of Master Chief. The importance of the Halo franchise to gaming is a very big issue, though, and one worth it's own article. Having played through the game, there's really only one question I'm here to answer today. Does it meet expectations? In a word: yes. It's not the best game ever made, and it may not even be the best game this year. Will it make the fans happy, and deservedly sell thousands of Xbox 360s? Very much yes. Read on for my impressions of Bungie's years-in-the-making epic, Halo 3.

Nothing disappoints me more than having my expectations met. I managed to see The Matrix without knowing what to expect, and as a result it was a fine moviegoing experience. Lair, one of the first in a series of high profile PlayStation 3 games due out this year, met every expectation I had when I picked up the controller. If you haven't been paying attention to games sites of late ... that's bad. Pushed for time and under pressure from higher ups at Sony, Factor 5 has poorly rehashed the same formula that made for a couple of very playable GameCube games. The difference? Lair is, in some places, literally unplayable. It's disappointing, and a frustrating way to begin my relationship with the PS3. Read on for my thoughts on Lair, and what might have been.

Earlier this month Dr. Eyjólfur "Eyjo" Guðmundsson, the newly hired EVE Online economist, released his first market report looking at the mining and trade of minerals within CCP's massively multiplayer online game. I had a chance to speak to Dr. Guðmundsson at GDC Austin, to further understand why it is that an online game needs an econ professor on staff. We discussed his work on the mineral information, future plans, the reality of trust in an inherently hostile world and why that makes for a bad banking environment, and a few words on player communication from CCP CEO Hilmar Petursson. Read on for the full interview.

Last week we asked you for questions to pass on to Turbine CEO Jeff Anderson, about their recently released Lord of the Rings Online Massively Multiplayer Online Game. There were a ton of great queries, and unfortunately Mr. Anderson had only a limited time to spare for us. Over the phone we still managed to discuss a wide variety of topics, including: their use of the license, lessons learned from the Asheron games, World of Warcraft impact on the genre, what Tolkien would have thought, and whether or not they're working on a Linux/Mac client. Make sure to give them a look, and many thanks again to Mr. Anderson for taking the time to speak with us.