Research jokes

Streaming video over wireless sensor networks? Multiple hops? And over IEEE 802.15.4? I really wanted to scream why? Sometimes I would give the researchers the benefit of the doubt when I come across some bizarre piece of research which I don’t claim expertise in. Afterall, the researchers could be brilliant, and I’m just not on the same wavelength as they are. So it’s probably a good idea I’m not making a fool out of myself. BUT quite often there are many researchers, particularly those that just finished their degree, and then pursue a PhD straight away, have little idea whether their research are useful, if novel at all. For them, it seems to me, fundings for their research are easy to come by, because people in the UK don’t fight over each other to become researchers. Many top graduates instead prefer to work in the more lucrative financial sectors in the City. So research becomes an easy way out for graduates who couldn’t get into the industries.

Fair enough, universities may not be able to always retain the best people to do cutting edge research. That’s life. But those who stay on to do research are no muppets either. They are highly educated. So what’s gone wrong when you see a lot of mickey mouse papers being accepted in conferences? Oh come on, I’m sure many of you have come across such papers or presentations before. I’ve a friend who got his PhD from Cambridge. He gives me the impression that the more publications you have, the more impressive your CV becomes. When asked about the quality, he told me that very often people can get away with the quality of the publications provided that you have enough quantity. Because, employers often do not know enough about the research area of the PhDs, particularly when they move to work in a different field. Scandalous, especially when there are so many obscure conferences around that pretty much accept any paper as long as you submit one. This is really a waste of taxpayers money, on people who have no ambition of producing good research.

Having said that, I believe the supervisors of the PhD students are partly to blame as well. I’ve come across some supervisors who give very little guidance to the students. These students then work like headless chicken, with no good directions given by their supervisors. The results are, these students end up spending a lot of time working on something that add little value to the state-of-the-art, despite their effort. This is a shame. At least the situation is better in the UK, compare to some other parts of Europe, where students are not awarded their doctorate if their work are not up to their mark. This is good, as getting a PhD ain’t no walk in the park. In some countries, at least I’m aware of, not only did some jokers get their PhD, they are now assistant professors! There’s no way, in my mind, that these people have what it takes to become assistant professors so soon. In the UK, I don’t think they are even qualified to be a lecturer! So you can get a feel of why the work produced by the PhDs can sometimes be so bad.

In all honesty, the industries have an important role to play in shaping the research as well, for example when the industries are involved in collaboration work with the academia. But unfortunately, from what I’ve seen so far, a lot of the companies put their own agenda first when it comes to working in this kind of environment. In some European Integrated Project I’ve involved in, it feels like the partners work together by working independently. Incredible. And some companies are part of the consortium just because they are giant brands in their industries. They get a slice of the fundings yet can get away without contributing much to the project. Frustrating isn’t it? If European research wants to be on a par with those across the atlantic, think all the stakeholders above really need to get their act together!

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Imagine

Fast forward a couple of years and imagine that we now have the “perfect” wireless sensors, what do we foresee them to add to our life? Consider the scenario where these sensors are dotted everywhere, can last an awful long time, hardy, reliable, with their position known (either by themselves or by somebody else), cheap enough to be disposable in an environmental friendly way after use, can be re-tasked or upgraded easily, etc, etc. There are going to be an awful lot of physical information that will be captured by these devices. So now what? What do we do with these information?

Like our 5 senses, we don’t need every single piece of information we sense all the time. So the capability to boil these raw information down to something meaningful and useful will be crucial. But that’s only the start. We need to be able to close the loop. As in we need to be able to do something to the information we possess, however important and useful they are. Take for example temperature sensors dotted around in a room. We have all these information about the temperature of the room. Temperature near the window is lower than the rest of the room. There’s big temperature variations across the height of the room, as the air vent is located at the ceiling. Based on these information, can we, or more precisely in this case the air vent, do something about improving the comfort level of the people who occupy the room? Maybe not, as some may argue that temperature alone is not enough. The air vent is too old-fashioned and we can’t control in which direction we want the air to blow. And the definition of comfort could well be very different for different people. But the important thing is to be able to at least control the room temperature based on the feedback from the sensors. So the key is a closed-loop process. But the loop need not be immediate, where say the air vent will be immediately controlled. Buildings or facilities may be improved based on the information gathered over time. Beautiful. Isn’t it?

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WSN Deployment Survey

There is a prize to participate in this Wireless Sensor Network (WSN) survey!

“1 full-service weekend in the alps including room and board, ski pass, and professional guiding for you. Powder guaranteed. In case you prefer summer (no skis) I am sure we can negotiate! Transport there and back is excluded.”

Wow, but I rather they pay me in cash instead, should I win!

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Wireless sensor that sits behind the ear

There was a short article in the October IET magazine about using a small ZigBee sensor the size of a hearing aid to collect and transmit data from the human body. I suspect that hearing-aid-size sensor, which is “inspired by the semicircular canals of the inner ear responsible for controlling motion and balance”, is probably only made up of a simple accelerometer sensor, which can be easily found in most prototype wireless sensor motes on offer in the market nowadays. Nothing earth-shattering really, in my opinion, merely decoupling a simple sensor from wires. If the “whole package” is just about monitoring raw data collected from the sensor then that is even more disappointing. The power of modern sensor network lies in its ability to gather information from multiple cheap wireless sensors, with the resultant information giving more accurate insight into the sensed object or enviroment than a single sensor can achieve. I’d expect more from the “pioneer” in body sensor networks!

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Java seems to be the future of wireless motes

About a year ago we wanted to get our hands on some Sun SPOTs motes for our project because we have more people around that know how to write Java applications and use the familiar development tools (not many people heard of TinyOS’s nesC, and using the primitive word editor to write applications seems to be the norm!). But unfortunately Sun, or more precisely that particular team, was unable to deliver their products on time, not to mention shipping products outside the US, due to ROHS issues.

Now another major mote manufacturer seems to share the vision of using Java as the platform for developing applications for the wireless sensor motes. “We at Sentilla (formerly Moteiv) are extremely excited about the use of Java technology in our products”, quoted from Joe Polastre of Sentilla (see here for more details). As I said, this makes a lot of sense and it will be interesting to see if Crossbow will soon follow suit. Java may soon be the future.

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