Thursday, January 27, 2011
Norton partition magic 9.0 2010
Norton partition magic 9.0 2010
* Divides a single hard drive into two or more partitions
* Lets you safely run multiple operating systems on the same PC
* BootMagic™ makes it easy to switch between different operating systems
* Allows you to copy, move, resize, split, or merge partitions as needed without losing data
* How-to wizards guide you step by step through the partitioning process
* Intuitive Windows®-****d browser lets you find, copy and paste files in both Windows and Linux® partitions
* Allows you to create and modify partitions up to 300 GB*
* Supports USB 2.0, USB 1.1, and FireWire® external drives**
* Supports FAT, FAT32, NTFS, Ext2, and Ext3 file systems
* Converts partitions among FAT, FAT32, and NTFS without losing data
* Allows you to enlarge an NTFS partition without restarting your computer
* Resizes NTFS system clusters to the most effective size
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Wednesday, January 12, 2011
How Much Sleep Do You Really Need?
How Much Sleep Do You Really Need?
Sleep is one of the richest topics in science today: why we need it, why it can be hard to get, and how that affects everything from our athletic performance to our income. Daniel Kripke, co-director of research at the Scripps Clinic Sleep Center in La Jolla, Calif., has looked at the most important question of all. In 2002, he compared death rates among more than 1 million American adults who, as part of a study on cancer prevention, reported their average nightly amount of sleep. To many, his results were surprising, but they've since been corroborated by similar studies in Europe and East Asia. Kripke explains.
Q: How much sleep is ideal?
A: Studies show that people who sleep between 6.5 hr. and 7.5 hr. a night, as they report, live the longest. And people who sleep 8 hr. or more, or less than 6.5 hr., they don't live quite as long. There is just as much risk associated with sleeping too long as with sleeping too short. The big surprise is that long sleep seems to start at 8 hr. Sleeping 8.5 hr. might really be a little worse than sleeping 5 hr.
Morbidity [or sickness] is also "U-shaped" in the sense that both very short sleep and very long sleep are associated with many illnesses—with depression, with obesity—and therefore with heart disease—and so forth. But the [ideal amount of sleep] for different health measures isn't all in the same place. Most of the low points are at 7 or 8 hr., but there are some at 6 hr. and even at 9 hr. I think diabetes is lowest in 7-hr. sleepers [for example]. But these measures aren't as clear as the mortality data.
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Why Do We Remember Bad Things?
Why Do We Remember Bad Things?
You remember where you were on the morning of 9/11, but you have no recollection of what you had for lunch last Thursday. One of life's great mysteries is why certain experiences get lodged immovably in our memory, while others are forgotten. Fortunately, recent advances in neuroscience have helped spur major breakthroughs in scientists' understanding of the nature of memory. To explain, TIME asked Matt Wilson, a professor of neurobiology at MIT's Picower Institute for Learning and Memory.
Q: Why do we remember unpleasant events better than ordinary ones?
A: We think of memory as a record of our experience. But the idea is not just to store information; it's to store relevant information. [The idea is] to use our experience to guide future behavior.
There's been a lot of really interesting research that points to a connection between our memory of the past and our ability to imagine the future. In our studies of animal models of memory, where we're able to go in and actually watch the pattern of [a rat's] brain activity, we can see that the brain activity while the animal is in a behavior-based situation, [such as navigating a maze,] directly corresponds to its future behavior: what it can, may and will do in the future. We can see that the animal does in fact — I hesitate to use the word, but I'll use it anyway — "think." In terms of brain activity, anticipating the future and remembering the past seem to be related.
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Which Are Worse: Calories from Carbs or Fat?
Which Are Worse: Calories from Carbs or Fat?
If you're one of millions of Americans trying to lose weight, you probably wish you had a more effective diet than the one you're on now. And if you're wondering whether Dean Ornish's low-fat diet will help you shed pounds better than Dr. Atkins' low-carb menu, the answer is simple: it doesn't matter. Scientists know that on a molecular level, different types of starch and different types of fat have varying effects when they hit the body. But in terms of weight loss, low-fat diets and low-carb diets overall are equally effective (and, most of the time, neither will help you keep the weight off long-term), says Walter Willett, chair of the department of nutrition at Harvard School of Public Health. Here's why.
Q:Will eating a calorie of fat make you fatter than eating a calorie of carbohydrate?
A: From many kinds of studies conducted over years, we are quite confident now that a calorie from fat will cause a similar amount of weight gain as a calorie from carbohydrate. There are some interesting questions about whether eating carbohydrate calories versus fat calories will make you eat more calories, but based on what you put into your mouth, it's pretty clear that the source of the calories is really not important.
[Whether fats or carbohydrates are more filling] is one issue that's been raised — but it's been raised on both sides. The best way to get to the bottom line is to look at long-term studies where we randomize people to a high-fat/low-carb diet or to a low-fat/high-carb diet and follow them for at least a year or more. That kind of study takes into account the possibility that one kind of diet provides more satiety; so, over the long run you would see more weight loss on that diet. But those studies — half a dozen or more have been done — show quite clearly that the percentage of calories from fat has very little effect on long-term weight loss.
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Why Do Women Live Longer Than Men?
Why Do Women Live Longer Than Men?
Across the industrialized world, women still live 5 to 10 years longer than men. Among people over 100 years old, 85% are women, according to Tom Perls, founder of the New England Centenarian Study at Boston University and creator of the website LivingTo100.com. Time.com asks him why.
Q: Why do women live longer than men?
A: One important reason is the big delay — and advantage — women have over men in terms of cardiovascular disease, like heart attack and stroke. Women develop these problems usually in their 70s and 80s, about 10 years later than men, who develop them in their 50s and 60s. For a long time, doctors thought the difference was due to estrogen. But studies have shown that this may not be the case, and now we know that giving estrogen to women post-menopause can actually be bad for them.
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Saturday, January 8, 2011
Why Are People Taller Today Than Yesterday?
Skeletons and written records show that human beings today are inches taller than humans just a century or two ago. And yet even today average heights vary among different nationalities, even among genetically homogenous populations, like the South Koreans and North Koreans. (South Koreans are taller.) John Komlos, professor of economics at the University of Munich and a pioneer in studying human well-being through history, explains what governs human height, and why some populations are taller than others.
Q: Why are people taller today than yesterday?
A: There are two main reasons. One is that the diet has improved considerably. In spite of some very negative aspects of the diet of industrialized populations, we have much better vitamin, mineral and protein intake than 100 or 200 years ago. As a consequence the body can grow much better.
Monday, January 3, 2011
7 Billion, National Geographic Magazine
Read more about this important issue at ngm.nationalgeographic.com With the worldwide population expected to exceed seven billion in 2011, National Geographic magazine offers a 7-part series examining specific challenges and solutions to the issues we face. The magazine introduces the series with its January cover story "7 Billion," offering a broad overview of demographic trends that got us to today and will impact us all tomorrow. The first in-depth story will appear in the March issue, focusi
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