Monday, August 24, 2009

comparing HDMI cables

While I don't even have a HD TV, one day I probably will.

And so I'm not looking at getting an HDMI cable and saw this guy reviewing cables at Amazon. But come to think of it, the HDMI cable will probably come with the cable box and/or Blu-Ray player, so the following will probably be useless, but since I've written this far, WTH, here goes.

* * *

Explanation of technique used for Review (actual results are below with accompanying title).

My first inclination when I received this cable, was to attempt to do a side-by-side comparison of various HDMI cables to determine what benefit, if any the various cables provide. To make such a test fair however, I had to find identical televisions, input devices, (cable box, blu-ray, standard dvd, etc), and a place to put them; as you may imagine this proved to be way more effort than it would be worth.

After contemplating the issue I came to the conclusion that such a test would be pretty worthless anyways. Since I (like most people) never watch identical televisions side by side the real question lies in whether one HDMI cable improves the picture enough that it is discernable without viewing the pictures simultaneously. After all, if a viewer cannot discern a difference between the two without looking at both together, then there is no justifiable reason to buy one over the other.

With this in mind I used the following equipment to test the cables:
Television: Sony Grand WEGA KDS-55A2000 55-Inch SXRD 1080p Rear Projection HDTV

Cables:
1. HDMI Cable 6ft 6 ft 1.3 1080P FOR PS3 TO DVD LCD HDTV
2. Cables To Go 98035 Premium HDMI v1.3 Digital Audio/Video Cable (8 Feet, Black/Grey)
3. Mediabridge - 6ft Ultra-High Speed HDMI Cable - 120 Hz - Version 1.3 Category 2 - 1080p - PS3 - Blu-Ray
4. Monster M Series M1000 HDTV HDMI Cable (8 ft. / 2.43 m.)
5. Sony 5mm High speed HDMI cable ver. 1.3 (White)

Inputs:
1. PlayStation 3 80GB
2. Optimum HD Cable Box/DVR (not sure of the model number)

**The Test**
To conduct the test I had my wife label each of the cables with a number, the cables were mixed then piled together behind the television. With my wife assigned as the operator. I and two friends sat on the other side of the television. We watched pieces of Planet Earth on Blu-Ray, as well as Transformers on Blu-Ray and Standard Def. In addition, we watched the same song from American Idol in both HD and SD, and portions of an NBA playoff game.
Each of us had a card numbered 1-5 with space for comments on image quality, sound, etc., for each cable. The test was, as aforementioned, blind. This was to ensure that one of my friends (one of whom provided the $200 monster cable) and I, owner of the .01 + shipping no name cable (and most of the other ones) would not be biased by knowing it was our cable. If you shell out $200 for something you really want it to outperform, which creates bias.

And now:

**The Results**
All three of us agreed that there were no conclusive differences in the test. After a lot of switching between various inputs the conclusion was that while we occasionally perceived slight differences it was never clear and would be impossible to tell if the two pictures were not side by side.
Thus I must conclude that these 5 HDMI cables are, for all practical purposes, identical. Which means that they all had average performance and the main purchase determiners are price, aesthetic quality and build quality.
So to sum up, taking into account my opinion of the different cables, the HDMI Cable 6ft 6 ft 1.3 1080P FOR PS3 TO DVD LCD HDTV is the cheapest and feels it, it will probably need to be replaced soonest as well but at .01 cent plus shipping you can afford to. The Cables To Go 98035 Premium HDMI v1.3 Digital Audio/Video Cable (8 Feet, Black/Grey) and Mediabridge - 6ft Ultra-High Speed HDMI Cable - 120 Hz - Version 1.3 Category 2 - 1080p - PS3 - Blu-Ray were pretty similar but I like the design and build quality of the Cable-to-Go a little more, it feels more solid, I feel like this one would last a while longer than the first cable but I didn't do any endurance tests. My least favorite of the bunch in terms of feel/price was the Sony 5mm High speed HDMI cable ver. 1.3 (White) which I felt, was very thin and cheap feeling considering its price tag, I wouldn't bet that it would outlast either the Cable-to-Go cable or the Mediabridge. The Monster M Series M1000 HDTV HDMI Cable (8 ft. / 2.43 m.) is well made and aesthetically pleasing and looks as if it will last you until something replaces HDMI, I cannot however recommend it because the price tag is simply preposterous, as it provides no visual or auditory improvement.

Wednesday, August 05, 2009

temperature rise not explained entirely by carbon

A team of scientists led by a University of Hawaii oceanographer had a big surprise when they looked to the ancient past for clues to global warming.

Atmospheric carbon increased 70 percent during the period known as Paleocene-Eocene Thermal Maximum 55 million years ago, said Richard Zeebe. Yet it was less than expected to explain a rapid increase in temperatures, he said in an interview.

"This constitutes an enigma because carbon dioxide released cannot account for the entire warming. This means something else contributed significantly to the warming," he said.

"We're not saying carbon dioxide is not important," he emphasized. "It is very important. Current and future warming is almost entirely due to carbon emissions. There is no doubt about this."

However, his team believes other mechanisms could have contributed to the rapid heating during the Paleocene-Eocene Thermal Maximum period, which they said represents "a possible analogue for the future."

"The question is still open by how much the global temperature will increase until the end of the century, depending how much carbon dioxide we put into the atmosphere," Zeebe said.

Monday, August 03, 2009

a coin flip isn't a coin flip

We use coin tosses to settle disputes and decide outcomes because we believe they are unbiased with 50-50 odds.

Yet recent research into coin flips has discovered that the laws of mechanics determine the outcome of coin tosses: The startling finding is they aren't random. Instead, for natural flips, the chance of a coin coming up on the same side as it started is about 51 percent. Heads facing up predicts heads; tails facing up predicts tails.

Three academics—Persi Diaconis, Susan Holmes, and Richard Montgomery—through vigorous analysis made an interesting discovery at Stanford University. As they note in their published results, "Dynamical Bias in the Coin Toss," laws of mechanics govern coin flips, meaning, "their flight is determined by their initial conditions."