How many different types of plants are there?

Scientists have found and described more than 275,000 kinds of plants, but they believe that many more are yet to be discovered. Plants vary greatly in size and appearance. Some, like single-celled algae, are so small that you can only see them with the help of a microscope. Others, like giant sequoia trees, are so big that you cannot even see the tops of them. Plants are very different from one another because they have developed features—over millions of years—to help them live in the world’s many different environments.

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Are Machines making human a dumb?

Imagine being surrounded by technologies, and hardly being aware of them. For instance, a person walks into a room and without doing anything, the entire atmosphere is fine-tuned to his or her current mood or expectations. Measurements are taken, personal data is sensed and recorded, and the room adjusts to integrate with the person’s countenance. All this occurs without turning a switch or adjusting an appliance simply walk into the room. We’re beginning to move in this direction, with recent advances in medical technology, with personal fitness devices, and with smart home systems.

Behind the scenes, as the individual enters the room, the unseen technology helps advance the person’s security, health, comfort, and even creativity by providing a seamless set of adjustments and changes to everything from room temperature to computer access to food preparation. What’s not seen are the computers running super-high-speed algorithms, computations, and calculations processing commands and actions to create a seamless life existence for everyday needs.

Here’s a real-world scenario: The person walks in the room. The sensors identify the person, as well as the mood of the person using facial features and expressions, body temperature, and movements, including gait and posture. Additionally, the smart room can monitor an individual’s current health conditions, such as blood pressure, heart rate, breathing, and chemical composition. This is all done in real time.

Next, a robot comes out bringing you water and vitamin supplements from sensing those that are physically lacking. While sitting in a couch overlooking a virtually-generated ocean with the sound of crashing waves, the user decides to catch up on what is happening in the world and accesses the latest news by making a quick sweeping gesture in the air. The room instantaneously turns off the ocean scene and pulls up a news program. It all happens without the user needing to be fully aware of the entire process.

Such a scenario isn’t just limited to the confines of a person’s living quarters. It can apply to a city, a park, a museum, or a business. Imagine a society that’s so intelligent that the machines and computers are constantly collecting data, and learning from our actions and behaviors to make sound judgements and decisions. This human centric vision is just that, centered on the individual with technology serving to enhance, nurture, and protect, making life continually easier, healthier, and more productive. Importantly, people will retain and use the power to preprogram myriad commands and conditions suitable for their daily lifestyles and activities.

Are these innovative technologies are “dumbing” ground for your kids future?

Stop Error Checking in code

Error codes are the problem, not the solution. You probably don’t realize it, but all that code you add to “handle errors” are just making the problem worse. And no matter how much more time you devote to “error checking,” you will never end up with a system that’s smart enough to keep itself error free.

So why do you keep trying? As it happens, there is a better way: just stop doing the error checking. Purge your system of the concept of “error” in the right way, in fact, and you’ll end up with an implementation that works better in nominal cases and gives you better insight and opportunity to regain control when something unexpected happens. Your code will be simpler, too. To get this right we’ll need to reformulate your thinking a little.

Let’s talk about software errors/exceptions and how you can craft better software by giving them appropriate design considerations. I’ve often found that developers, even experienced developers, don’t put much thought into the error objects that they produce.

1. Be specific :
When an exceptional situation occurs and you wish to throw an exception for that state, what type of error should you throw?

2. Great software error messages :
While that seems helpful, it is not a wise idea. Firstly, it leaks implementation details to any users who might see the error message. Secondly, there’s only so much context you can squeeze into the message.

3. Use error properties :
You can simply add properties to your implementation that states properties that matter to you.

4. Only use exceptions in exceptional cases :
This is more a general rule, but exceptions are supposed to be exceptional. They break control flow making it difficult to understand the repercussions of an exception. That means it can be hard for other developers to understand your code. Further making this worse, exceptions are often treated in special ways by the host runtime. Exceptions should be exceptional.

Why is some extreme behaviour called “beyond the pale”?

The expression dates back to the English Crown’s first efforts to control the Irish by outlawing their language and customs. But the unruly Irish were just that, and by the fifteenth century the English still controlled only a small area around Dublin, protected by a fortification called “The Pale,” meaning sharp sticks (i.e., impaled). To the British, to go “beyond The Pale” meant that you were entering the uncivilized realm of the wild Irish.

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Why do we perspire on a hot day?

When the body temperature rises, the sweat glands are stimulated to secrete perspiration. It is nature’s way to keep the body cool. During the process of evaporation of sweat, body heat is taken away, thus giving a sense of coolness.

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Why should I visit the library often?

Libraries offer books for people of all ages, and much, much more—they are places of learning and discovery for everyone. Besides books, public libraries offer videos, DVDs, free access to computers and the Internet, and many literacy-related programs. For elementary school children, there are variations of the read-alouds and storytelling hours that often include discussions and presentations by the children themselves, as well as summer reading programs. For middle-school kids, there may also be book talks, summer reading programs, creative writing seminars, drama groups, and poetry readings. The more you read, the more you learn! In addition, the library is a place to find information and help with schoolwork. Your school library may offer some of these services as well.

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How can kids help the homeless?

Kids can help the homeless in a number of ways. You can collect canned food or freshly baked items and take them to a shelter. You can ask your parents if you can clean out your closet and give some of your old clothes to homeless children. You can collect toys from your friends, and then donate them to a local shelter. You can open a lemonade stand or have a bake sale and give the money you make to a shelter or an organization that helps the homeless. And, if you are old enough, you can volunteer to help out at a local shelter—you can baby sit, read, help with homework, or play games with the children.

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Why is the bugle call at day’s end called “taps”?

In the seventeenth century, the British borrowed a Dutch army custom of sounding a drum and bugle to signal soldiers that it was time to stop socializing and return to their barracks for the night. The Dutch called it “taptoe,” meaning “shut off the taps,” and the abbreviated “taps” became a signal for tavern owners to turn off the spigots on their beer and wine casks. After lights out, taps signals that the soldiers are safely home, which is why it’s played at funerals.

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