Chronology of Events in Science, Mathematics, and Technology. Primordial Weirdness: Did the Early Universe Have One Dimension? BUFFALO, N.Y. -- Did the early universe have just one spatial dimension? That's the mind-boggling concept at the heart of a theory that University at Buffalo physicist Dejan Stojkovic and colleagues proposed in 2010. They suggested that the early universe -- which exploded from a single point and was very, very small at first -- was one-dimensional (like a straight line) before expanding to include two dimensions (like a plane) and then three (like the world in which we live today). The theory, if valid, would address important problems in particle physics.
Now, in a new paper in Physical Review Letters, Stojkovic and Loyola Marymount University physicist Jonas Mureika describe a test that could prove or disprove the "vanishing dimensions" hypothesis. Because it takes time for light and other waves to travel to Earth, telescopes peering out into space can, essentially, look back into time as they probe the universe's outer reaches. * The mystery of the universe's accelerating expansion.
100 Helpful Photography Tutorials for Beginners and Professionals. Photography as both a profession and a hobby is an incredibly expansive topic that covers a remarkably vast range of subjects from science and art. No matter where you lie on the professional spectrum, there is simply always more to learn. We spent countless hours scouring the web for the best content we could find and share with you, and today we'll help you expand your knowledge with 100 photography related tutorials! "There are many composition guidelines which can be applied in almost any situation, to enhance the impact of a scene. Below are ten of the most popular and most widely respected composition rules. " "Graphic illustrations [and explanations] of the difference between RAW and JPEG (also called JPG).
Understanding this will help with an understanding of why correct exposure and white balance in the camera are important. " A basic discussion of white balance and how to respond to different lighting situations. "Use a simple device to get perfect color in all of your shots" We come from the future. What's Special About This Number? Product curves. Curve S is n2, so the product curves on the right side of the spiral are n2 – 1, n2 – 4, n2 – 9, etc. Curve P is n2 + n so the curves on the left side are n2 + n – 2, n2 + n – 6, n2 + n – 12, etc.
These curves have many interesting properties.. I'll point out just a few. As the S-minus curves extend outward, the angles subtended by the numbers on them approach zero rotations (zero degrees). Therefore the fractional parts of the square roots of integers on those curves must approach zero. Similarly, the angles subtended by the numbers on Curve P and all the P-minus curves approach an angle of 1/2 rotation (180 degrees). The differences between S and the "S-minus curves" are perfect squares. Odd curves (those with factors that differ by odd numbers) are offset from curve P, and even curves are offset from curve S. The nth product curve on the even (square) side, counting curve S as zero, has a difference between factors of 2n and an offset from curve S of n2. The illustrated guide to a Ph.D.
Imagine a circle that contains all of human knowledge: By the time you finish elementary school, you know a little: By the time you finish high school, you know a bit more: With a bachelor's degree, you gain a specialty: A master's degree deepens that specialty: Reading research papers takes you to the edge of human knowledge: Once you're at the boundary, you focus: You push at the boundary for a few years: Until one day, the boundary gives way: And, that dent you've made is called a Ph.D Of course, the world looks different to you now: So, don't forget the bigger picture: Keep pushing. There's a bit more below, but I also wrote a follow-up 5 years after the illustrated guide which may be of interest -- HOWTO: Get tenure. Related posts If you like these posts, then I recommend the book A PhD Is Not Enough Get it in print; fund students; save lives By request, a print version of The Illustrated Guide to a Ph.D. is on sale.
Click here to preview or buy it. Why biology? License: Creative Commons Resources. 55 Amazing Adobe After Effects Tutorials For Beginners & Experts. Lectures. 10 Rock Solid Website Layout Examples. Layout can both be one of the easiest and one of the trickiest facets of web design. Sometimes a designer can bust out an amazing layout in minutes and sometimes that same designer can struggle for the better part of day with the same task. Each project is unique and calls for a unique solution, but I’ve found it helpful to keep a few rock solid and incredibly versatile alignments in mind that I can bust out when I get stuck.
The ten layouts below should be enough to get you through even the worst cases of designer’s block when you can’t figure out the best way to arrange the content on your page. Keeping It Simple Page layout is equal parts art and science. Designers often stress out far too much about the layout process. However, if you have a good look around the web you’ll see that this isn’t necessarily the case. Great looking websites often use layouts that are fairly simple and not the least bit unique. 1. This is probably the most simple layout on the list. 2. 3D Screenshots 3. 4. IP over Avian Carriers. A homing pigeon can carry Internet Protocol traffic. In computer networking, IP over Avian Carriers (IPoAC) is a humorously-intended proposal to carry Internet Protocol (IP) traffic by birds such as homing pigeons.
IP over Avian Carriers was initially described in RFC 1149, a Request for Comments (RFC) issued by the Internet Engineering Task Force (IETF) written by D. Waitzman and released on April 1, 1990. It is one of several April Fools' Day RFCs. Waitzman described an improvement of his protocol in RFC 2549, IP over Avian Carriers with Quality of Service (1 April 1999). Later, in RFC 6214 released on 1 April 2011, and 13 years after the introduction of IPv6, Carpenter and Hinden published Adaptation of RFC 1149 for IPv6.[1] Real-life implementation[edit] This real life implementation was mentioned by the French MP Martine Billard in the French Assemblée Nationale,[5] during debates about Hadopi. Risks[edit] Other avian data transfer methods[edit] See also[edit] References[edit] The Top 10 Best Science Fiction Books. Before the comments fill up with “Why didn’t you include this” and various slights against our personal and professional integrity, this is just a list of ten great science fiction novels, not in order, and by no means the top ten ever produced.
‘Ten of the best’, not ‘the ten best’. That being said, please post up your own favourites, as we’re always looking for new things to read. 10. The Moon Is A Harsh MistressPublished: 1966 Author: Robert Heinlein Awards: Hugo (1967), Nebula (1966), Prometheus, (1983)Buy it on Amazon Heinlein’s elegantly constructed novel evokes some of the finest traditions in science fiction, with a near-future setting on the mongrel colony of Luna, which is preparing its revolution against the tyrannical rule of Earth. 9.
. | Kindle Edition 8. It’s nigh-on impossible to talk seriously about the post-apocalyptic subgenre of science fiction without mentioning Walter M Miller Jr’s A Canticle For Leibowitz. 7. . | Kindle Edition 6. . | Kindle Edition 5. . | Kindle Edition 4. Who Came Up With Computer Symbols? Simple animation to explain complex principles - Electronics. 1, aircraft radial engine 2, oval Regulation 3, sewing machines 4, Malta Cross movement - second hand movement used to control the clock 5, auto change file mechanism 6, auto constant velocity universal joint 6.gif 7, gun ammunition loading system 8 rotary engine - an internal combustion engine, the heat rather than the piston movement into rotary movement # Via World Of Technology. 1, inline engine - it's cylinders lined up side by side 2, V-type engine - cylinder arranged at an angle of two plane 3, boxer engine - cylinder engine arranged in two planes relative.
Ancient Roman History Timeline. Provides a chronological index of the history of Ancient Rome with extensive links to internet resources. Emphasis is placed upon the use of primary source material, numismatics, and a focus upon the roles of women in ancient time. scroll down for the timeline Thank you for visiting! Timeline Menu Ridley Scott's GLADIATOR is a great film. Is it great history? Click here to learn the real story behind the events and characters portrayed in the movie. Kindly report any suggestions, problems, errors, or dead links by emailing david(at)exovedate.com Using info from this site?
For detailed copyright information and bibliographic citation, click here contact the author by emailing david(at)exovedate.com (note: replace (at) with the @ symbol) Copyright © David Neelin: All Rights Reserved c. 2nd Millennium BCE || Archeological Remains Archeology reveals human remains, elk bones, bronze artifacts (rings, axes, etc.) C. 1st Millennium BCE || The Etruscans 753 BCE || Legendary Founding of Rome then later: Freud's *The Interpretation of Dreams* Chapter 1, Section D. Back to Psych Web Home Page Back to The Interpretation of Dreams Table of Contents D. Why Dreams Are Forgotten After Waking That a dream fades away in the morning is proverbial. The forgetting of dreams is treated in the most detailed manner by Strumpell.
In the first place, all those factors which induce forgetfulness in the waking state determine also the forgetting of dreams. . * Periodically recurrent dreams have been observed repeatedly. According to Strumpell, other factors, deriving from the relation of the dream to the waking state, are even more effective in causing us to forget our dreams. Finally, we should remember that the fact that most people take but little interest in their dreams is conducive to the forgetting of dreams. It is therefore all the more remarkable, as Strumpell himself observes, that, in spite of all these reasons for forgetting the dream, so many dreams are retained in the memory. Jessen (p. 547) expresses himself in very decided terms: The observations of V. Sheep Brain Dissection: The Anatomy of Memory. The Official String Theory Web Site.
Table of Contents. Existence. First published Wed Oct 10, 2012 Existence raises deep and important problems in metaphysics, philosophy of language, and philosophical logic. Many of the issues can be organized around the following two questions: Is existence a property of individuals? And Assuming that existence is a property of individuals, are there individuals that lack it? What does it mean to ask if existence is a property? A full answer to this question requires a general theory of properties, which is well beyond the scope of this article. There is a debate in the literature on properties between the abundant conception of properties, according to which there is a property corresponding to every natural language predicate and, more generally, every class of individuals, and the sparse conception of properties, according to which a predicate expresses a property only if the objects that predicate is true of resemble one another in an intrinsic way. 1.
Russell's strategy depends on two claims. nBot, a two wheel balancing robot. nBot Balancing Robot David P. Anderson nBot: 27 January 2003 Update: 14 Sept 2013: nBot Rev 6.0. nBot completely rebuilt as Version 6.0 after the disastrous LiPo Fire of 2012. Update: 14 June 2012: nBot finally has some avoidance and navigation sensors, two PING))) ultrasonic sonar sensors, and five SHARP IR distance detectors, in addition to the MicroStrain FAS-G IMU. Here is a video of nBot doing perimeter following (72M mpeg) in the basement of the building where I work. I've been working on a two-wheeled balancing robot, nBot . This robot was featured as NASA's Cool Robot of the Week for 19 May 2003.
The basic idea for a two-wheeled dynamically balancing robot is pretty simple: drive the wheels in the direction that the upper part of the robot is falling. The robot hardware was built in my home machine shop. Rev 1. Rev 2. Rev 3. The ball-bearing pivot and angle sensor were replaced by a piezo-electric gyroscope and ADXL202 accelerometer mounted just above the motor deck. Rev 4. Main page - Introduction to Genetic Algorithms - Tutorial with Interactive Java Applets. These pages introduce some fundamentals of genetic algorithms. Pages are intended to be used for learning about genetic algorithms without any previous knowledge from this area. Only some knowledge of computer programming is assumed. You can find here several interactive Java applets demonstrating work of genetic algorithms.
As the area of genetic algorithms is very wide, it is not possible to cover everything in these pages. But you should get some idea, what the genetic algorithms are and what they could be useful for. Now please choose next to continue or you can choose any topic from the menu on the left side. There are translations of these pages available as well - Portuguese one (original mirror here) by Hermelindo Pinheiro Manoel, Japanese one by Ishii Manabu and Bulgarian one by Todor Dimitrov Balabanov. You can also check recommendations for your browser or read about the background of these pages. (c) Marek Obitko, 1998 - Terms of use. Psychological ("personality") Types. Psychological ("personality") Types According to Jung's theory of Psychological Types we are all different in fundamental ways. One's ability to process different information is limited by their particular type.
These types are sixteen. People can be either Extroverts or Introverts, depending on the direction of their activity ; Thinking, Feeling, Sensing, Intuitive, according to their own information pathways; Judging or Perceiving, depending on the method in which they process received information. Extroverts vs. Introverts Extroverts are directed towards the objective world whereas Introverts are directed towards the subjective world. Sensing vs. Sensing is an ability to deal with information on the basis of its physical qualities and its affection by other information. Thinking vs. Thinking is an ability to deal with information on the basis of its structure and its function. Perceiving vs. Perceiving types are motivated into activity by the changes in a situation.
ENTp , ISFp , ESFj. Machine Guns and Gun Systems" In the 1800s, gun manufacturers designed a number of mechanisms to address the problems associated with limited firing ability. A lot of these early machine guns combined several barrels and firing hammers into a single unit. Among the most popular designs was the Gatling gun, named after its inventor Richard Jordan Gatling. This weapon -- the first machine gun to gain widespread popularity -- consists of six to 10 gun barrels positioned in a cylinder. Each barrel has its own breech and firing pin system. Each firing pin has a small cam head that catches hold of a slanted groove in the gun's body.
The Gatling gun played an important role in several 19th century battles, but it wasn't until the early 20th century that the machine gun really established itself as a weapon to be reckoned with. The Gatling gun is often considered a machine gun because it shoots a large number of bullets in a short amount of time. Recoil systemsBlowback systemsGas mechanisms. Elasticity. Stephen Wolfram: A New Kind of Science | Online - Table of Contents.
Color Psychology. Ask a Mathematician / Ask a Physicist | Your Math and Physics Questions Answered. What Does Your Body Language Say About You? How To Read Signs and Recognize Gestures - Jinxi Boo - Jinxi Boo. Online | Math Monday: Mailing Tubes. Tutorial - Controlling The Real World With Computers. For One Tiny Instant, Physicists May Have Broken a Law of Nature. Index of free personality tests and intelligence tests.