Monday, 22 April 2013

Week 4 - Ten fingers, two hands and one huge leap


Leap Motion is a new kind of motion sensing device which allows you to use fingers/objects in 3D space to control things on your computer screen. It looks like small box (matchbox size) and it could be placed in front of computer. To interact you use space above it. The device is similar to Kinect controller but much more sensitive - in 1 meter hemisperical area it’s able to track object with precision of 0.01 mm. To achieve this precision it uses 2 cameras and 3 infrared LEDs and special tracking algorithms. It gives possibility to perform different natural real life gestures like pointing, swiping, navigating in 3D space, pinch-to-zoom, drawing in a really responsive and merely "organic" way. You can even pick something and put it down. I already see myself during editing video and building slideshows just like Tom Cruise in Minority Report movie. Ten fingers, two hands and one huge leap. Everything for just $79.99!

https://www.leapmotion.com/


At first glance it looks amazing and I think it’s worth discussing about future use. Will it be a huge success and a real replacement of keyboard and mouse or only a niche complement device? What about lack of feedback and hand fatigue after long interaction? During interaction with mouse our hand is more relaxed and precise at the same time. What about drawing? Digital graphic tablets convert analog interaction to digital world while maintaining pressure sensitivity and pen tilt for a real pen-on-paper feel. Here we have drawing in the air. Is it useful for artists? On the order hand let’s imagine doctors using medical applications without touching computer maintaining sterility or interactive lesson with educational app for children presenting for example 3D solar system.


There are opinions that the main problem is not with interaction or device itself but it’s about lack of innovative apps showing the real potential of Leap Motion. That’s why producers are looking for developers. If you feel really interested and want to create unique experience by developing new apps you can join developer community:


Special online store called “Airspace” will be launch in May for downloading and buying apps and games designed to use with Leap Motion.

Well I’m a little skeptical about this device but of course I’ve already preordered one in February and I'm waiting for premiere in May ;)

Some questions for you:

1. Do you think that's really groundbreaking device or only another digital gadget?
2. Do you find it useful for interaction in your work/play?
3. Will you buy it at this price?
4. Which existing applications/games should be augmented with this technology to get better interactive experience?
5. Do you have an idea for a new application/game/interface using this device? 


Sunday, 21 April 2013

Week 4 - Project Glass

Google seems to be trying to branch out into all sorts of futuristic inventions that go far beyond search and advertising which are their core products. We've seen self-driving cars, electronic devices such as the Nexus Q (which has already failed), Chrome notebooks and high speed internet (Google Fiber). Perhaps the most interesting of them all is the Google Glass project - a tiny wearable screen which projects images directly in front of your eye. Equipped with a camera, microphone and connectivity, it becomes something right out of a science fiction movie. And yet here it is:




Questions:

1. Will this catch on and become as ubiquitous as mobile phones, or is it a niche product in your opinion?
2. Do you think it's OK to wear a discrete recording device everywhere at all times? Should there be any restrictions?
3. Although Google is already hinting that advertisements will not be allowed, how would you feel if they were?
4. Is it too distracting or is it solving the problem of more distracting handheld devices as Google claims?

Monday, 15 April 2013

Week 3 - Bitcoin Revolution




Hi all,

                 I was wondering what do you think about Bitcoin?  Recently it made a lot of big waves about them, I found few articles about BTC, so pleas read them and tell me your opinion.
Below 2 attached articles I placed a few questions.


Nobody Knows If There's A Bitcoin Bubble
 
It has become almost obligatory for mainstream journalists writing about Bitcoin to describe the currency’s current value as a bubble. It’s widely assumed that the recent increase in the value of a bitcoin, from $13.50 at the start of the year to more than $250 today, must be the result of speculative excess.
But I have yet to see anyone actually make the argument for this point of view. Lots of people have made arguments that Bitcoin is nothing but a fad, and that it’s value will be $0 in the long run. I think that view is incorrect but it’s not a crazy view—it’s one I held a couple of years ago. But I don’t know of anyone who has made a convincing argument that Bitcoins are worth something, but that the current price is too high.
As I write this, the value of all outstanding Bitcoins is a bit less than $3 billion. Is that a big number or a small number? It’s a difficult question because the answer depends on what happens to the underlying Bitcoin economy in the coming years. The value of Bitcoin-denominated transactions has been rising steadily. If that process continues, the “Bitcoin economy” could be much larger in five or ten years than it is today.
To give just one example, Western Union has a market capitalization of $8.5 billion and earned $1.3 billion in profit in 2010. If you think Bitcoin will eventually become a popular way to transmit money internationally, it’s not crazy to think Bitcoin’s “market cap” will be in the same ballpark as Western Union’s.
Obviously, that’s just a rough back-of-the-envelope estimate. Maybe Bitcoins won’t pose a competitive threat to Western Union. But the point is that at the scale of global financial networks, $3 billion is a pretty small amount of money. If Bitcoin proves superior to conventional financial networks for at least one significant application, it’s easy to imagine enough demand for the currency to justify the current valuation.
A lot of people seem to be comparing the current transaction volume to the current valuation. But that’s a mistake. If you think the fundamentals of the Bitcoin economy will support a price of $500 by 2018, it’s rational to buy bitcoins at $250 today even if today’s fundamentals only support a price of $50. So the recent rise in Bitcoin’s price is a bet on the future size of the Bitcoin economy. That bet may turn out to have been mistaken, but we won’t know until we see how people use Bitcoin in the coming decade.
Disclosure: I own some Bitcoins.

 

Four Reasons Bitcoin Is Worth Studying

As Adam Ozimek points out Bitcoin has so far largely been greeted with eye-rolling by professional economists. One reason is that the cryptocurrency’s most enthusiastic advocates tend to subscribe to a hard-money, end-the-Fed worldview that is unpopular among elites. That has caused the latter to reflexively take the opposite view, treating Bitcoin as primarily a monetary policy experiment and predicting its doom.
My sympathies are with the pros here. Fiat currency isn’t perfect, but I think alternatives like the gold standard would be worse. But Bitcoin is a more than a gold standard for the Internet age. It’s the world’s first fully decentralized payment system, combining the irreversibility of cash with the convenience of electronic payment. There’s never been anything quite like it before, and as a result it poses a number of interesting intellectual puzzles. Here are four examples.

Monetary economics

What gives money its value? One popular theory says that modern fiat currencies get their value by “government fiat”: the government declares a currency to be the official one, requires that currency be used to compute and pay taxes, and thereby confers value on what would otherwise be worthless slips of paper.
Bitcoin is a clear challenge to that view. It has no “backing” from any government or other large institution, yet the stock of outstanding bitcoins is now worth more than $1 billion.
The conventional response is to dismiss Bitcoin as merely a bubble, with no intrinsic value at all. But that view makes it hard to explain the events of late 2011. The value of Bitcoins fell from $32 in June to $2 in November. Then the price started going up again, rising to $4 in December 2011 and to $7 in January.
That should surprise you. Even after watching the value of their previous investments decline by a factor of 16, a critical mass of Bitcoin enthusiasts was prepared to pour millions of dollars into the currency. It’s possible, of course, that all those people were delusional. But it’s at least possible they saw something the rest of the world didn’t. Certainly, that was the conclusion I came to. I rethought my previous skepticism and bought some Bitcoins of my own in early 2012.
Even if you think the current value of of more than $140 is a bubble, it’s clear that Bitcoin has some genuine applications. The number of daily Bitcoin transactions has soared from around 1000 at the beginning of 2011 to about 50,000 today. Figuring out the “fundamentals” that drive the currency’s long-term value seems like an interesting theoretical puzzle.

Political philosophy

The great technological feat of Bitcoin is its solution to the “double spending problem.” The cryptographic protocols needed for one currency holder to “sign over” his currency to another have been well-understood for decades. But no cryptographic operation can prove you haven’t given the same coins to someone else. Before Bitcoin, the only known way to address this issue was to have a centralized transaction register. Control over that list was inevitably a point of control for the currency as a whole.
Bitcoin uses a clever scheme to maintain a fully decentralized transaction register, preventing double-spending without giving anyone de facto control over the system. The global, shared register of Bitcoin transactions is called the blockchain, and it’s organized into “blocks.” One block is added approximately every 10 minutes. Each node in the Bitcoin network creates a candidate block and then races to solve a difficult mathematical puzzle that takes its block as an input. The winner of the race gets to add its block to the blockchain, and in that block it can credit itself a fixed number of new bitcoins (currently 25 BTC) as a reward for participating in this process. All bitcoins now in circulation were originally created by this process, which is known as mining.
When a new block is announced, the other nodes in the network confirm that the proposed block follows all of the rules of the Bitcoin protocol. If it doesn’t, the block is discarded and the other nodes continue working on their own candidate blocks.
A few weeks ago, a node that had upgraded to version 0.8 of the client software generated a block that nodes running version 0.7 and earlier didn’t recognize as valid. This produced a “fork” in the network, with each half generating blocks the other half viewed as illegitimate.
If this situation had continued unchecked, it would have led to chaos, because it would have allowed hackers to spend the same bitcoins twice: once in the 0.7 version of the blockchain and again in the 0.8 blockchain. Fortunately, the most influential members of the Bitcoin community moved quickly. They made a judgment call that it would be easier to get 0.8 nodes to downgrade than to get the older nodes to upgrade. They persuaded those who had upgraded to 0.8 to downgrade, abandoning the blocks they had created since the fork and accepting the 0.7 branch as the official one.
It was important to move quickly because the stakes were growing higher with every passing hour. Every few minutes another block was added to the blockchain, earning its creator about $1000. For many of the miners, abandoning the 0.8 branch meant giving up thousands of dollars in cold cash. The longer the fork had lasted, the bigger the financial hit they would have needed to take to heal the rift.
A core part of Bitcoin’s appeal is that it’s not under anyone’s control. Supposedly, nobody has the authority to change the Bitcoin money supply, cancel or reverse transactions, or otherwise change the attributes of the protocol. But in practice that’s not really true. In the wake of last month’s fork, the elites in the Bitcoin community effectively changed the rules in a matter of hours. In principle, there’s no reason those same elites couldn’t make other changes to the Bitcoin protocol.
There’s a direct parallel here to issues of political legitimacy in a nation state. In principle, most democratic nations have constitutions that bind the behavior of government officials. In practice, a cabal of elites can and regularly do change those rules with minimal input from the rank and file. Yet the discretion of elites is not unlimited. In the case of both Bitcoins and nation states, it’s easy to make changes that will be intuitively appealing to the broader public. But even a broad coalition of elites may not be able to make changes that are strongly opposed by rank and file members of the community.

Economies of scale and competition policy

When Bitcoin is described as a decentralized system, a key assumption is that no single party controls a majority of the network’s computing power. The randomized process for deciding who gets to create the next block effectively works on a “one CPU cycle, one vote” principle. If any single party gained 51 percent of the network’s computing power, it could effectively take control of the network, ignoring blocks produced by the other 49 percent of the nodes. A successful attacker could not only claim 100 percent of the mining profits for itself, it would also gain the power to block transactions it didn’t approve of by simply not including them in its blocks.
Early in Bitcoin’s life, this wasn’t a cause for concern because the barriers to entry was very low. Anyone could download the Bitcoin client onto his computer and run it. But a technological arms race has made Bitcoin mining an increasingly esoteric business. Today, the leading miners use custom-built Bitcoin mining gear that costs thousands of dollars. Indeed, this high-end hardware is so much more energy-efficient that conventional PCs are no longer energy-efficient enough to make Bitcoin mining profitable.
As a result of this and other factors, Bitcoin mining has become increasingly centralized. Bitcoin miners have organized themselves into “pools” that cooperate and share the spoils among their members in proportion to the computing power they contribute. If this chart is to be believed, the top two pools control 53 percent of the Bitcoin network’s computing power.
In principle, these two pools might be able to join forces and execute a 51 percent (or 53 percent) attack on the rest of the network. But doing so might prove foolish in the long run, since that kind of power grab might undermine public confidence in the currency’s long-term viability, since a mining cartel might have the power to change the rules of the Bitcoin protocol in ways that benefit themselves at the expense of ordinary users.

Data

Imagine if Visa were to give researchers a complete record of every transaction it had ever processed. That database would provide the raw material for numerous studies on consumer spending patterns, the business cycle, and much more.
The decentralized nature of the Bitcoin protocol means that every transaction is automatically published to the world. To be sure, there are some limitations to its value for research purposes. Users can and often do make up new addresses for each transction, making it hard to tell which transactions were made by the same person. And the blockchain doesn’t include annotations on why each Bitcoin transaction was made.
Still, a clever researcher should be able to extract a significant amount of useful information. For example, many companies and individuals publish official addresses for receiving funds. Also, in many cases it will be possible to make inferences about which funds are related by observing when funds are combined and spent together. And at a minimum, you can study things like the volume of Bitcoin transactions over time, the average transaction size, the fraction of bitcoins that are in active circulation at any one point in time, and so forth.
Nothing quite like Bitcoin has ever existed before. Even if you think the current price of Bitcoin represents a ludicrous bubble (for what it’s worth, I don’t), it’s still likely to be a fertile laboratory for testing our economic intuitions.
Disclosure: I own some Bitcoins.
Update: A friend who knows more about economics than me says that Kiyotaki and Wright’s account is considered the standard account of fiat money’s value in the profession.

Questions:
1-      Do you think Bitcoin is a big bubble?
2-      Do you bought or plan to buy a Bitcoin?
3-   What do you think when you'll be able to do ordinary shopping by paying the BTC?
3-      Is a virtual currency necessary for us ?  is a development of virtual decentralized currency an inevitable progress ?

Wednesday, 10 April 2013

Week 2: Personal time management tips.



Hello All,

The topic I’d like to discuss with you is about how do you manage your time.
This is something that affects all of us.

In the era of ever-increasing pressure on the outcome how can we manage our time not to lose control? 
Do we control what to do or maybe the environment decides what we do?
I personally do not feel that I have one hundred percent prescription how to compose my time.

Do you?

Here is the list of tips from different people of how they manage to have some time:

For individuals that do not want to discuss the time topic I have something lighter – weather.
Not too many days ago we had Easter holidays. 

Did you have trouble to distinguish whether that was Easter or Christmas?
I did. I also heard my youngest kid saying that it might be that Santa Claus will visit us :).
Usually that amount of snow is hard to get even on Christmas :). 

And this awful time change that took away 1 hour of valuable rest we could have. Do we need that ‘every 6 month time switch’?

Do you miss full blown Spring with a warm sunshine and green growing from everywhere?

Not only Poland suffers from the extreme weather – please see the short article regarding possible explanations of the weird weather we have:

Sunday, 7 April 2013

Week 2: Going around the city… Bicycle style!


Spring has come at last! If we look outside the window many of us would just want to get out, do something active and lose that additional weight that we gained during the winter.  As one of the most popular summer ways of spending time actively is cycling. I would like to go one step further and write about using bikes as a way of transportation (and not just as a thing that we do from time to time).

The city that is probably the most famous for the amount of people using bikes as a primary way of getting around is Amsterdam in the Netherlands. I remember my shock when I visited this city for the first time and saw myriads of people riding their bikes – old, young, from serious looking businessmen wearing suits to old ladies carrying baskets full of groceries.  This made me wonder, why is this not so popular in Warsaw?
If you didn’t visit Amsterdam before, you may look at the following video to have some insight about what I’m writing about:

A year back I went to visit my friend, who lives in Paris. When I asked her how she gets around in the city she replied: “by bike”. Again I was quite moved by this response, especially when she told me that she uses the bike to get to most places, including tango evenings (called milongas).  Imagining her wearing a fancy looking dress and riding a bike brought a smile to my face. She saw my look and pointed out that it’s something normal for people living there.

About that time I heard that a project “Veturilo” was starting in Warsaw.  This initiative was about allowing people to borrow bikes and use them to get around the city. There were quite a lot of places where you could pick up (or park) the bikes and the prices for using them were not high.  I was curious how this will get on.
Recently I’ve heard that this had become a major success and that so many people are using it that the company has decided to extend the numbers of bikes and stations so that it could meet the ever-growing demand. Here’s a promotional video:

One more example of a city friendly to this way of transportation is Copenhagen. I have never been to this city but looking at the following video I am impressed by the infrastructure and the approach the authorities have to make this a more safe, and accessible way of getting around:

What is your approach to this? Do you think that seeing a man wearing a suit and riding a bike is something that will be seen in the near future in Poland?  Have you ever been in a place where cars were not the primary source of transportation?  What future do you see for unconventional means of transport?