All of us know stupid people and at times have thought about how could a human be so dumb and still survive. Now after years of research Scientists at the Johns Hopkins Medical School and the University of Nebraska have found a possible reason for some of the folks being so dumb. There is a virus that exists in the green algae found in ponds and lakes that affects cognitive functions in the brain. In their tests 44% of the test subjects had the virus infection and those who tested positive for the virus scored 7-9 points lower on tests designed to measure the brain’s accuracy and speed.
They then ran some tests on mice after infecting them with the virus and found that the infected mice had a harder time exiting from the test maze than uninfected mice.
The researchers were conducting a completely unrelated study into throat microbes when they realised that DNA in the throats of healthy people matched the DNA of a chlorovirus virus known as ATCV-1.
ATCV-1 is a virus that infects the green algae found in freshwater lakes and ponds. It had previously been thought to be non-infectious to humans, but the scientists found that it actually affects cognitive functions in the brain by shortening attention span and causing a decrease in spatial awareness.
The researchers then studied how ATCV-1 affected mice by injecting the virus into their digestive tracts.
They then put the mice into a maze, where the animals infected by the virus had a more difficult time finding their way round and were less likely to pay attention to a new object or notice a new entry that had been previously inaccessible.
ATCV-1 was able to get into the hippocampus pathways of the mice and alter the expression of genes relating to memory formation, learning and synaptic plasticity (an important foundation of learning and memory), as well as how the immune systems of the mice responded to being exposed to the virus.
The full study is is published in the Proceedings of the National Academy of Sciences (PNAS) journal.
Thanks to Slashdot.org for the link to the original story.
If you are like me then you must have spent a ton of money and time playing classic arcade games like Frogger, Pac-man plus etc over many long afternoons. A few days ago (2 days to be exact) over 900 of such games were released online and the best part is that you can play them right in the browser. Say good-bye to the possibility of doing any productive work for the next couple of days.
Check it out at: The Internet Arcade.
Of the roughly 900 arcade games (yes, nine hundred arcade games) up there, some are in pretty weird shape – vector games are an issue, scaling is broken for some, and some have control mechanisms that are just not going to translate to a keyboard or even a joypad.
But damn if so many are good enough. More than good enough. In the right browser, on a speedy machine, it almost feels perfect. The usual debates about the “realness” of emulation come into play, but it works.
Obviously, a lot of people are going to migrate to games they recognize and ones that they may not have played in years. They’ll do a few rounds, probably get their asses kicked, smile, and go back to their news sites.
A few more, I hope, will go towards games they’ve never heard of, with rules they have to suss out, and maybe more people will play some of these arcades in the coming months than the games ever saw in their “real” lifetimes.
Well this is all for now. I am off to relive some memories and to try getting the stupid frog across the road without getting squished.
Those who know me know that I am a big fan of Doctor Who and have been a fan for a while. It is one of the most iconic Science Fiction shows out there along with Star Trek and Star Wars. Now BBC is planning on using that popularity to encourage children to learn coding. Yes, you read that right: “Dr Who is going to help kids learn how to code”. The game is called “The Doctor and the Dalek” and it aims to get children to use logical reasoning, variables and loops and repetition to help the Doctor save the universe from the Daleks, teaching them the basics of programing while having fun.
Unfortunately the game is only accessible if you are based out of UK which is not surprising considering this is BBC we are talking about. They are famous for restricting content based on geographical boundaries. But from what I have read about it online, it looks like a lot of fun and even though I know programing I want to try it out. Hopefully they will open it up to a broader audience in the near future as I would love to have my Nieces and Nephews take it out for a spin. (and I will of course be there to ‘help’ them play the game)
If you are located in UK you can check it out at the cbbc site.
Do you think you have the skills to write code that is as readable, clear, innocent and straightforward as possible, and yet somehow exhibits evil behavior that cannot be seen even when staring at the source code? If so then you should take a look at The Underhanded C Contest. The contest has been running for about 6 years now and it is amazing how easy these guys make it look to create code that does something but looks like it is doing something else.
The 7th Underhanded C Contest is now open.
The goal of the contest is to write code that is as readable, clear, innocent and straightforward as possible, and yet it must fail to perform at its apparent function. To be more specific, it should do something subtly evil. Every year, we will propose a challenge to coders to solve a simple data processing problem, but with covert malicious behavior. Examples include miscounting votes, shaving money from financial transactions, or leaking information to an eavesdropper. The main goal, however, is to write source code that easily passes visual inspection by other programmers.
Check it out at: The Underhanded C Contest.
No, this is not a joke or a toy for a 5 year old. In the 70’s the computers were still not in the affordable range for 99% of the population so a bright chap by the name of David Hagelbarger working at Bell Laboratories designed CARDIAC (CARDboard Illustrative Aid to Computation) as an educational tool to give people without access to computers the ability to learn how computers work. Basically it is a micro-processor made out of cardboard.
The CARDIAC computer is a single-accumulator single-address machine, which means that instructions operate on the accumulator alone, or on the accumulator and a memory location. The machine implements 10 instructions, each of which is assigned a 3-digit decimal opcode. The instruction set architecture includes instructions common to simple Von Neumann processors, such as load, store, add/subtract, and conditional branch.
Operating the computer is fairly simple–the cardboard slides guide you through the operation of the ALU and instruction decoder, and the flow chart shows you which stage to go to next. The program counter is represented by a cardboard ladybug which is manually moved through the program memory after each instruction completes.
Even though the CARDIAC is dated and very simplistic, it is still a useful tool to teach how microprocessors work. Although modern processors include multi-stage pipelines, finely-tuned branch predictors, and numerous other improvements, the basic principles of operation remain the same
You can print your own by visiting Kyle Miller’s Site. More information about CARDIAC and how to use it is available at cs.drexel.edu and on it’s Wikipedia site.
Thanks to Hackaday.com for the story.
Here’s an interesting site that teaches Cybersecurity to folks in the form of a game. As you know cyber criminals are getting more and more sophisticated and the best way to counter that is to train more folks on the basic principles of Cyber Security. It is targeted towards children but is good fun for adults as well.
Take cybersecurity into your own hands. In this Lab, you’ll defend a company that is the target of increasingly sophisticated cyber attacks. Your task is to strengthen your cyber defenses and thwart the attackers by completing a series of cybersecurity challenges. You’ll crack passwords, craft code, and defeat malicious hackers.
Check it out at: NovaLabs Cybersecurity
Did you know that India’s very own Mangalyaan is racing to Mars and about to do the final course corrections to enter Mars orbit? If the corrections work then India will be the first country to successfully enter the Mars orbit on the first try and the first Asian country to make it to mars.
The Indian Space Research Organisation has published a handy slide deck (PDF) explaining what happens next. There’s lots of little chores like uploading of commands going on at the moment, but things get interesting on September 24th. The PDF has a breakdown of what is expected when the action starts so do check it out.
I am going to try staying up at night to see if there is live coverage of the event. This is a great day in the Indian Space age.
Now, there are a lot of folks who are making comments to effect of “India should spend money on feeding the poor, instead of launching space rockets”. I have seen multiple comments to this effect on various blogs and forums. What these folks don’t realize is that spending money on the poor is all well and good but we need to start spending money on the Space program as well because end of the day we don’t have that much room on earth and the only place for us to go once Earth is full is out in space. There we have a lot more resources, enough space to expand and figure out new technologies that will make it easier/cheaper to feed the folks on earth.
Well this is all for now. Will write more later.
1. India vs America: Earthling invaders in race to MARS
2. India’s MOM Mars mission makes final course correction
3. ISRO Website
Too many so called photographers today think that putting a black and white filter on a photo of food makes it an artistic photo. Unfortunately that is not true. If you are interested in Photojournalism or just want to learn how to take good photographs (and I am not talking about selfies here) you should check out this free MIT course: Documentary Photography and Photojournalism: Still Images of a World in Motion.
Check it out if you have some time.
Thanks to Lifehacker.com for the link.
Boffins at MIT have run some tests and found out that if you peel the bark off a Pine tree branch and pour water through the stick, then it will block upto 99% of e-coli bacteria and a host of other bad stuff giving up to four liters of drinkable water per day. This makes it a lot cheaper than any current commercial water filtration implementation in the market and a lot more scalable.
Dirty water is a major cause of mortality in the developing world. ‘The most common water-borne pathogens are bacteria (e.g. Escherichia coli, Salmonella typhi, Vibrio cholerae), viruses (e.g. adenoviruses, enteroviruses, hepatitis, rotavirus), and protozoa (e.g. giardia). These pathogens cause child mortality and also contribute to malnutrition and stunted growth of children.’ People have been working on engineering cheaper and cheaper filtration systems for years, but now a group of researchers has found a promising and simple solution: a tree branch. ‘Approximately 3 cm^3 of sapwood can filter water at the rate of several liters per day, sufficient to meet the clean drinking water needs of one person.’
Of course there are some caveats; the system can trap most types of bacteria, the smallest of which measure about 200 nanometers but currently cannot trap viruses most of which are much smaller in size. Also, the stick needs to be kept wet or the filtration is not that effective.
The researchers have published a paper in this week’s journal PLoS ONE where they go over their findings and demo this functionality. Check it out if you have some time.
I am definitely adding this to my things to know in case of an emergency list.
Thanks to Slashdot for the initial story.
Additional reading: Need a water filter? Peel a tree branch – MIT News Office
Ideally you should know if you have posted something online that will get you fired, but as we all know there are people in the world who are a bit slow and need extra help in figuring out stuff. So for these people there is a new web service called “FireMe! Who wants to get fired?” that goes over your tweets and uses an algorithm to figure out the chances of you getting fired if you boss reads your Twitter history.
Personally I think that if you need help figuring out whether you said something online that will get you fired then there is a high chance that you actually did post something which will get you fired.
According to the site, they are doing this to raise awareness about the dangers of public online data. Plenty of folks have been fired for things they posted online. Don’t become another statistic, post responsibly.
Thanks to PopSci for the initial Link,