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kicks off the first of 10 stories which follow the incredible journey of “El Boomerang” around the world! Come, follow the bouncing ball! “Buster Baxter and the Letter from the Sea” - While on vacation with the Read family, Buster |
discovers a message in a bottle on the shore. Could it be an urgent message from the people of the Lost City of Atlantis? Buster is determined to find out and sends them a message back…by throwing his own bottles |
in the ocean! Will he learn that keeping the beach and waters clean is the real message? “The Cherry Tree” Muffy will do anything to have a gigantic Dream Bouncy Castle at her party, or so she thinks. When her |
favorite cherry tree is cut down to make room for the castle in her yard, she starts to have regrets. Then to make matters worse, she learns that cutting down trees hurts the environment, too. What can Muffy do to |
in Endless Park’s pond, but a sudden rainstorm sweeps it down the sewer grate! While searching for the boat, Steve and George learn that debris from the street ends up in the ocean. Will they ever find Steve’s little boat |
in the big ocean or will he be taking history again next year? “Windmill Monkey” – George proudly finishes planting his rooftop garden when he turns around to find that Compass and his friends have eaten all the seeds. The |
scarecrow overlooking the garden didn’t scare them at all! While buying more seeds, George spots a windmill and learns how the wind can power just about anything. The inspired monkey sets out to create the world’s first wind powered scarecrow |
in hopes that will keep his seeds safe. But some things are more easily planned than done! “Tiddalick the Frog” Whyatt’s mom tells him that he’s wasting water. This is a really big problem and he's not sure how to |
fix it. So the Super Readers dash into the Australian folk tale of Tiddalick the Frog and make the acquaintance of a funny amphibian whose puddle jumping is using up all the water and leaving his neighbors in the dust |
– literally! As the Super Readers help Tiddalick and his dry friends, they learn how important water is to the planet, along with a valuable lesson about conservation. All is not well in Perfectamundo, a dome-enclosed cybersite, when orange spots |
are discovered building up on the dome’s interior surface, blocking the site’s precious sunlight. What source could be responsible for the spots multiplying so fast? Is it Hacker’s new factory that pours out orange clouds through smoky stacks? It can’t |
be that new Digifizz toy, with its tiny burst of colorful sparkles shooting into the air each time it gets used. With time running out, the CyberSquad must come to grips with the power of multiplication and use it to |
undo the site’s pollution problem. ANGELINA BALLERINA™ THE NEXT STEPS “Angelina and the Dance-a-thon” Angelina and her friends organize a dance marathon for the Chipping Cheddar Earth Club as part of their "Camembert Cares" school project. After Gracie accidentally recycles |
the pledge sheet, Angelina uses her ingenuity to save the day! “EARTH DAY GIRL” When the villainous (and very large) Birthday Girl learns that planet Earth is having a special celebration on the same day as her happy occasion, she |
decides to wreak environmental havoc, just to teach the Earth a lesson. Can WordGirl find a way to stop the Birthday Girl’s eco-rampage and save Earth Day? MAYA & MIGUEL™ “EVERY DAY IS EARTH DAY” For a school Earth Day |
project, the kids decide to clean up an old lot and plant a community garden. But as the deadline approaches, a rainstorm hits, turning the patch of dirt into a muddy mess. How will Maya get her friends out of |
the muck this time? THE ELECTRIC COMPANY “The Flube Whisperer” Keith sends away for a Skeleckian pet that lives in a biosphere. But when the biosphere malfunctions, will Manny save the day? CLIFFORD THE BIG RED DOG® It’s Keep Birdwell |
Beautiful month and the kids are doing their part by planting a flower garden. Seeing this, the dogs decide to create a doggie flower garden of their own. But when Cleo hears that almost anything grows in Birdwell Island soil, |
she decides she’d much rather grow a garden full of dog toys! She soon learns, however, that working alone for a selfish end is not nearly as rewarding as working together for the whole community. BARNEY & FRIENDS™ “Home Sweet |
Earth: The Rainforest” It’s Earth Day, a great time for everyone to learn how to help take care of our world, but Ben is wasting paper while BJ isn’t too concerned about cutting down a tree to make room for |
a new playground. After a trip to the rainforest and a meeting with Mother Nature, everyone learns the importance of taking care of our world. As Earth Day comes to an end, Barney reminds us all that taking good care |
of our Earth is the natural thing to do for the people we love. About PBS KIDS PBS KIDS, the number one educational media brand for kids, offers all children the opportunity to explore new ideas and new worlds through |
television, online and community-based programs. More than 21 million children watch PBS KIDS on TV, and more than 21 million engage with PBS KIDS online each quarter. For more information on specific PBS KIDS programs supporting literacy, science, math and |
more, visit PBS.org/pressroom, and follow PBS KIDS on Twitter and Facebook. Curious George is a production of Imagine, WGBH and Universal. Curious George and related characters, created by Margret and H.A. Rey, are copyrighted and trademarked by Houghton Mifflin Harcourt |
Use these simple activities to get beyond the bubble and into some cool science. 1. Blow Bubbles: Take your bubble stuff outside or into the tub. Play around and notice what catches your child's interest. Watch, wonder, and experiment together. |
2. Observe Bubbles: Look carefully at a bubble on your child's wand. Ask: How does the shape change as you blow? What shape is the bubble when it floats into the air? What happens when the bubble lands? 3. Chase |
and Catch Bubbles: Notice how bubbles move in the air. Are they all moving in the same direction? Invite your child to blow at a bubble or fan it. What happens? Let your child try to catch a bubble on |
a bubble wand. Ask: Can you catch a bubble on top of another bubble? What happens when two bubbles touch each other? Gather items with holes to use as bubble wands: slotted spoons, funnels, fly swatters, plastic soda can six-pack |
holders, etc. Wave or blow through the "wands" and look at the bubbles. Ask: How are the bubbles from each wand the same? How are they different? Are the bubbles connected or single? Does the size of the openings in |
the wand make a difference in the size of the bubbles? Age Range: 3-5 Curious George is a production of Imagine, WGBH and Universal. Curious George and related characters, created by Margret and H.A. Rey, are copyrighted and trademarked by |
Houghton Mifflin Harcourt Publishing Company and used under license. Licensed by Universal Studios Licensing LLC. Television Series: ©2013. Universal Studios. All Rights Reserved. The PBS KIDS logo is a registered mark of PBS and is used with permission. Proud sponsors |
Ray Tracing and Gaming - Quake 4: Ray Traced Project Quake 4: Ray traced An algorithm was invented for this work that uses rays for collision detection (CD). A polygon-exact CD is quite easy for direct weapons. Only one ray is needed to determine the target. Shooting this ray works through the exact same mechanisms and... |
a ray to get a color value in rendering. (Polygon exact collision detection using ray tracing) For the player model a bounding sphere was approximated through many rays like in a radar system. (Bounding sphere approximated through rays) An interesting special effect which I want to present here in more detail is water.... |
should reflect the surrounding environment and it should be possible to look through the water with some refractions going on. Water in motion should not look flat; there should be some visible height differences in the waves. I want to present you some examples of water in games that we have seen the last years. Of co... |
to be done to make the game render fast enough, so this should not be a critic of the game or company itself. It should just show how water looks today in some games, what it lacks and how it could look in ray tracing games. ('Far Cry' (2004): The reflection in the water shows only the mountains, not the |
used for reflection on that normal maps, one ray is used to get the refraction through the water. The result is nice looking water. ('Quake 4: Ray traced': The water reflects the environment and the player) Samples from Q4RT in action can be seen in this video: |
Are you taking your PPI consistently, but still not having complete relief of your symptoms? Maybe it's what you’re putting in your mouth. Your diet and eating habits can actually make your digestive condition worse. There are a couple of ways certain foods can cause problems. Some may relax the lower esophageal sphinc... |
a valve between your esophagus and stomach. If this muscle relaxes and doesn’t close properly, acid can reflux back up into the esophagus. Also, some foods may irritate the damaged lining of the esophagus or stomach. Learn about foods and ways of eating that may be causing you to reach for those extra antacids. You may... |
before sitting down for a big pasta dinner or an all-you-can-eat pizza buffet. Tomato-based products, such as sauces, are acidic foods that may increase reflux symptoms and cause stomach irritation. Other acidic culprits include citrus fruits like grapefruits, lemons, oranges, and their juices. Eating large portions of... |
acid into the esophagus. To avoid this discomfort, eat smaller, more frequent meals. Spearmint and peppermint extracts are used in many foods, but unfortunately, they may exacerbate the symptoms of GERD. Mint may relax the muscles in the gastrointestinal tract, including the LES. But don’t put away your mint-flavored g... |
after a meal reduces acid reflux. Gum is thought to work by increasing saliva production, which helps to neutralize acid. Caffeine and Carbonation That morning cup of coffee or afternoon soda may be causing you discomfort. Caffeine is thought to increase acid levels and relax the LES, which can aggravate an existing ul... |
that even decaf coffee may relax the LES. Carbonated beverages, such as sodas or carbonated waters, may lead to acid reflux by increasing the pressure in your stomach. Fatty foods trigger reflux symptoms by decreasing the pressure of the LES. Eating too many fatty foods can increase digestive symptoms and may lead to w... |
being overweight and GERD. Studies show that obese people with GERD who lose weight have significant improvement in their symptoms. If you have recently gained weight and your clothes are too tight, this too may be making your symptoms worse. Tight-fitting clothes put pressure on the stomach, causing acid to flow into ... |
make your heartburn and stomach pain sizzle. Foods with a little kick are often responsible for GERD symptoms. Although spicy fare may irritate the stomach of people with ulcers, it does not cause ulcers. Actually, people with ulcers do not need to follow a bland diet, as previously thought. However, if a specific spic... |
be a good idea to avoid that food. Are you a chocoholic? Be careful, because those little treats you are allowing yourself could wreak havoc on your esophagus. Chocolate aggravates GERD by relaxing the LES. That chocolate snack may be particularly problematic at night time. Snacking late may increase the risk of nightt... |
eat two to three hours before lying down to sleep. Raising the head of your bed may also help to keep the acid in your stomach where it belongs. Having a few drinks this weekend? Before mixing that martini, think about the consequences. Alcohol may trigger GERD symptoms in three ways: - Increasing acid secretion - Rela... |
Slowing the movement of food through the gut One study showed that men who drank alcohol and smoked were more likely to have GERD. Smoking contributes to digestive problems by increasing acid secretion, relaxing the LES, and decreasing saliva (saliva neutralizes acid). Smokers are more prone to ulcers, and smokers and ... |
an ulcer. Know Yourself and Communicate With Your Doctor We are all individuals. Not everyone will have the same reaction to each food. The best way to determine your food triggers is to keep a food and symptom journal--write down what you eat, how much you consume, and how you feel afterward. You may soon be able to i... |
foods or habits causing you to take those extra antacids. Make sure to talk to your health care provider if you are not experiencing relief from your symptoms despite being on a PPI. |
Some of our nation’s costliest social problems—like child abuse and neglect—are rooted in early childhood. April is National Child Abuse Prevention Month, a time to recognize the proven policies that help break the cycle of abuse and that promote the social and emotional well-being of children and families. Voluntary h... |
throughout their child’s early years—a critical developmental period. Increasingly, states are turning to evidence-based home visiting programs in an effort to prevent abuse and neglect. Learn more about how home visiting gives families a solid foundation and helps states save money. The Annie E. Casey Foundation, Kids... |
of maltreatment by age group (Percent) – 2009," accessed February 28, 2012. Olds DL, Eckenrode J, Henderson CR, Kitzman H, Powers J, Cole R, Sidora K, Morris P, Pettitt LM, Luckey D, “Long-term Effects of Home Visitation on Maternal Life Course and Child Abuse and Neglect: 15-Year Follow-up of a Randomized Trial,” Jour... |
Health and Human Services (USDHHS), Administration on Children, Youth and Families, "Child Maltreatment 2008," accessed February 28, 2012. Fang X, Brown DS, Florence CS, Mercy JA, "The economic burden of child maltreatment in the United States and implications for prevention," Child Abuse & Neglect. 2012; In Press. Old... |
LM, Luckey D, “Long-term Effects of Home Visitation on Maternal Life Course and Child Abuse and Neglect: 15-Year Follow-up of a Randomized Trial,” Journal of the American Medical Association. 1997; 278(8): 637-643; Lowell DI, Carter AS, Godoy L, Paulicin B, Briggs-Gowan MJ, “A randomized controlled trial of Child FIRST... |
Lee E, Michell-Herzfeld SD, Lowenfels AA, Greene R, Dorabawila V, DuMont KA, “Reducing low birth weight through home visitation: a randomized controlled trial,” American Journal of Preventive Medicine. 2009; 36(2):154–160. Levenstein P, Levenstein S, Shiminski J A, Stolzberg JE, “Long-term impact of a verbal interactio... |
New on the IBM developerWorks, there's an article looking at using the Scilab software integrated into PHP to perform some more complicated mathematical processing. Scripting languages like Ruby, Python, and PHP power modern-day server-side Web development. These languages are great because you can easily and rapidly b... |
and the sciences. [...] In this article, we'll investigate one particular way to merge the power of a particular bit of scientific software - Scilab - with the ease of development and Web-friendliness of a server-side language: PHP. Your script uses the Scilab tool from the command line, called via something like exec,... |
the viewer. They show how to create two pages with form elements for allowing the user to interact with the script and one that helps you generate a graph based on some results. |
Gamma ray bursts are believed to be the most energetic phenomena in the universe. In one second they can emit more than 100 times the energy that the sun does |
throughout its entire 10 billion year life. This energy output is short lived, however, and within days the burst has faded forever beyond the reach of our telescopes. 3000 bursts |
having been detected through their gamma ray emission, only 30 have been seen with ground-based telescopes, and only one of these has been observed within an hour. In an ambitious |
project to detect the gamma ray bursts in the crucial first minute of their occurence, the School of Physics has entered a collaboration with the University of Michigan, Los Alamos |
National Laboratories, and Lawrence Livermore National Laboratory, to place a robotic telescope, ROTSE-III, at Siding Spring Observatory. triggered into action by a signal relayed through the Internet from an earth-orbiting |
satellite. The specially designed mounting for ROTSE-III allows it to point to any position in the sky and take an image within 5-10 seconds. The images are then automatically analysed |
for any new or rapidly varying sources, and this information is made available to other observatories throughout the world within minutes. The precise positions provided by ROTSE-III are essential to |
allow the worlds largest telescopes to observe the gamma for the new telescope occurred in March 2001. The enclosure and weather station were installed in April 2001, with the telescope |
During this tutorial you will be asked to perform calculations involving trigonometric functiions. You will need a calulator to proceed. | The purpose of this tutorial is to review with you the elementary properties of the trigonometric functions. Facility with |
this subject is essential to success in all branches of science, and you are strongly urged to review and practice the concepts presented here until they are mastered. Let us consider the right-angle triangle shown in Panel 1. The angle |
at C is a right angle and the angle A we will call θ. The lengths of the sides of the triangle we will denote as p, q and r. From your elementary geometry, you know several things about this |
triangle. For example, you know the Pythagorean relation, q² = p² + r². That is, the square of the length of the side opposite the right angle, which we call the hypotenuse, is equal to the sum of the squares |
of the lengths of the other two sides. We know other things. For example, we know that if the lengths of the three sides of any triangle p, q and r are specified, then the whole triangle is determined, angles |
included. If you think about this for a moment, you will see it is correct. If I give you three sticks of fixed length and told you to lay them down in a triangle, there's only one triangle which you |
could make. What we would like to have is a way of relating the angles in the triangle, say θ, to the lengths of the sides. It turns out that there's no simple analytic way to do this. Even though |
the triangle is specified by the lengths of the three sides, there is not a simple formula that will allow you to calculate the angle θ. We must specify it in some new way. |To do this, we define three |
ratios of the sides of the triangle. One ratio we call the sine of theta, written sin(θ), and it is defined as the ratio of the side opposite θ to the hypotenuse, that is r/q. The cosine of θ, written |
cos(θ), is the side adjacent to θ over the hypotenuse, that is, p/q. This is really enough, but because it simplifies our mathematics later on, we define the tangent of θ, written tan(θ), as the ratio of the opposite to |
the adjacent sides, that is r/p. This is not an independent definition since you can readily see that the tangent of θ is equal to the sine of θ divided by the cosine of θ. Verify for yourself that this |
is correct. All scientific calculators provide this information. The first thing to ensure is that your calculator is set to the anglular measure that you want. Angles are usually measured in either degrees or radians (see tutorial on DIMENSIONAL ANALYSIS). |
The angle 2º is a much different angle than 2 radians since 180º = π radians = 3.1416... radians. Make sure that your calculator is set to degrees. Now suppose that we want the sine of 24º. Simply press 24 |
followed by the [sin] key and the display should show the value 0.4067. Therefore, the sine of 24º is 0.4067. That is, in a triangle like panel 1 where θ = 24º, the ratio of the sides r to q |
is 0.4067. Next set your calculator to radians and find the sine of 0.42 radians. To do this enter 0.42 followed by the [sin] key. You should obtain a value of 0.4078. This is nearly the same value as you |
obtained for the sine of 24º. Using the relation above you should confirm that 24º is close to 0.42 radians Obviously, using your calculator to find values of sines is very simple. Now find sine of 42º 24 minutes. The |
sine of 42º 24 minutes is 0.6743. Did you get this result? If not, remember that 24 minutes corresponds to 24/60 or 0.4º. The total angle is then 42.4º | The determination of cosines and tangents on your calculator is |
similar. It is now possible for us to solve the simple problem concerning triangles. For example, in Panel 2, the length of the hypotenuse is 3 cm and the angle θ is 24º. What is the length of the opposite |
that the opposite side was 2 cm long and the hypotenuse was 3 cm long, as in panel 3, what is the angle θ? First determine the sine of θ You should find that the sine of θ is 2/3, |
which equals 0.6667. Now we need determine what angle has 0.6667 as its sine. If you want your answer to be in degrees, be sure that your calculator is set to degrees. Then enter 0.6667 followed by the [INV] key |
functions which is very important is the calculation of components of vectors. In panel 4 is shown a vector OA in an xy reference frame. We would like to find the y component of this vector. That is, the projection |
relations among the trigonometric functions which are important, but one in particular you will find used quite often. Panel 1 has been repeated as Panel 5 for you. Let us look at the sum cos² + sin². From the figure, |
far has been limited to angles between 0 and 90º. One can, using the calculator, find the the sine of larger angles (eg 140º ) or negative angles (eg -32º ) directly. Sometimes, however, it is useful to find the |
corresponding angle betweeen 0 and 90º. Panel 6 will help us here. |In this xy reference frame, the angle θ is clearly between 90º and 180 º, and clearly, the angle a, which is 180 - θ ( a is |
marked with a double arc) can be dealt with. In this case, we say that the magnitude of sine, cosine, and tangent of θ are those of the supplement a and we only have to examine whether or not they |
are positive or negative. For example, what is the sine, cosine and tangent of 140º? The supplement is 180º - 140º = 40º. Find the sine, the cosine and the tangent of 40º. |
|May20-06, 05:24 PM||#1| Stuck on couple related rates problems.. 1. A ship with a long anchor chain is anchored in 11 fathoms of water. The anchor chain is being wound |
in at a rate of 10 fathoms/minute, causing the ship to move toward the spot directly above the anchor resting on the seabed. The hawsehole ( the point of contact |
between ship and chain) is located 1 fathom above the water line. At what speed is the ship moving when there are exatly 13 fathoms of chain still out? For |
me, perhaps making the above drawing void. Another thing I don't understand is that it says it's anchored in 11 fathoms of water.. how could the question be asking what |
speed the boat would be moving if it were at 13 fathoms? 2. A ladder 41 feet long was leaning against a vertical wall and begins to slip. Its top |
slides down the wall whilte its bottom moves along the level ground at a constant speed of 4ft/sec. How fast is the top of the ladder moving when it is |
9 feet above the ground? For this one.. I didn't even know what to do.. of course I drew a triangle, hypotenuse of 41 and the vertical side of 9 |
feet.. and then.......? Mainly, I think problems such as these are really easy, but I have a really hard time picturing the problem or drawing it out. I don't know |
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