A photon is an elementary particle associated with light. However, for about a decade, some scientists believed that there was what they call a dark or dark photon. To an ordinary person, such a formulation seems to be a contradiction in itself. For physicists, this makes sense, because, in their opinion, it leads to unraveling the mystery of dark matter. New analyzes of data from experiments on accelerators, mainly the results of the BaBar detector, show where the dark photon does not hide, i.e. excludes zones in which it was not detected. The BaBar experiment, which ran from 1999 to 2008 at SLAC (Stanford Linear Accelerator Center) in Menlo Park, California, collected data from electron-positron collisions, positively charged electron antiparticles. The main part of the experiment, called PKP-II, ...

The Bay Bridge, the second famous bridge in San Francisco after the Golden Gate, will be the first bridge of its kind in the world to be illuminated by LED lights. 25000 LEDs will be placed on the structure in honor of its 75th anniversary. The name of the project, authored by Leo Villareal, an artist known for such installations, is Lights Bay. According to the plan, the launch of lighting should take place on March 5. It will be possible to admire them for the next two years. A team of several electricians is working on installing a large lighting system that weaves a dense network of wires around the spans of the bridge. The authors of the project do not disclose what the electricity bill will be? Do you have a project website? zp8497586rq

We continue the interrupted presentation of heavy vehicles. We will start the second part with an object coveted by many, especially young people, an object known from many excellent films of an American tractor, often shining from afar with chrome-plated chrome. American truck A great truck tractor with a powerful engine in the front, shining chrome in the sun and piercing the sky with vertical exhaust pipes - such an image, shaped by pop culture, mainly cinematography, will certainly appear before our eyes when we think about the American counterparts of trucks. In general, it will be a real vision, although there are other types of trucks in America. Where exactly does the different style and design come from - there is no unambiguous answer to this question, but several conclusions can be drawn. Americans generally love big cars, so this is also reflected in the truck, routes in America ...

The US Navy has patented "reality structure enhancement," a compact fusion reactor, an "inertial mass reduction" engine, and many other weird-sounding things. US Patent Law in the US allows you to file these so-called "UFO Patents". However, according to some reports, prototypes were to be built. At least that's what The War Zone, which conducted a journalistic investigation into these mysterious patents, claims. Dr. Salvatore Cesar Pais (1) is proven to be behind them. Although his image is known, journalists write that they are not sure if this person really exists. According to them, Pais worked in many different departments. Navy, including the Naval Center Aviation Division (NAVAIR/NAWCAD) and the Strategic Systems Program (SSP). SSP Mission:…

We have received a new signal amplifier from TP-LINK. This modern design device will easily save the user from the problem of the so-called. dead zones that each of us has encountered on our virtual journey. With 11AC Wi-Fi technology, we can easily expand our existing wireless network. It is important to note that the amplifier works with all wireless routers and allows you to create a dual-band network throughout your home or office. The device has a very modern design, thanks to which it fits well into any interior. It works in two wireless bands - at a speed of 300 Mbps in the 2,4 GHz band and 867 Mbps in the 5 GHz band, thanks to which we get connections with a total speed of up to 1200 Mbps. With. Two…

The crash of a flying car prototype piloted by Stefan Klein of the Slovak company AeroMobil, which had been working on this type of design for several years, caused everyone who had already seen hovering cars in everyday use to once again put their visions on hold. For the next one. Klein, at an altitude of about 300 m, managed to activate an improved parachute system launched from a special container. This saved his life - during the accident he was only slightly injured. However, the company assures that testing of the machine will continue, although it is not known exactly when the next prototypes will be considered ready for flights in normal airspace. Where are these flying wonders? In the second part of the popular movie series Back to the Future, set in 2015, we saw cars speeding through…

Smart weapons - this concept currently has at least two meanings. The first is related to military weapons and ammunition, which are aimed only at the armed enemy, his positions, equipment and people, without harming the civilian population and their own troops. The second refers to weapons that cannot be used by anyone other than those who are called to do so. These include adults, owners, authorized persons, all those who will not use it accidentally or for illegal purposes. Recently, there have been several tragedies in the United States caused by insufficient protection of weapons from children. Veronica Rutledge's two-year-old son of Blackfoot, Idaho pulled a gun from his mother's purse and pulled the trigger, killing her. Subsequent…

The glue gun, known in the workshop as a glue gun, is a simple, modern and very useful tool that allows you to use hot melt adhesives to bond various materials. Thanks to new types of adhesives with more and more specialized application possibilities, this method is increasingly replacing conventional mechanical connections. Let's take a look at YATO's beautiful red and black YT-82421 instrument. The gun is packaged in a disposable transparent packaging that must be irretrievably destroyed in order to be opened. After unpacking, let's read the instructions for use, because it contains important information that is better known before than after damage. After the YT-82421 is turned on with a small switch, the green LED will light up. Insert the stick of glue into the hole provided for this purpose on the back of the torso. After waiting about four to six minutes, the gun is ready ...

The Earth's climate is getting warmer. One can argue, first of all it is a person or the main reasons should be sought elsewhere. However, accurate measurements that were carried out over several decades cannot be denied? the temperature in the biosphere is getting higher and higher, and the ice cap covering the North Pole region melted to a record low size during the summer of 2012. According to data released by the German Institute for Renewable Energy, anthropogenic emissions of CO2, the gas considered the biggest contributor to adverse climate change, reached a record 2011 billion tons in 34. In turn, the International Meteorological Organization reported in November 2012 that the Earth's atmosphere already contains 390,9 parts per million of carbon dioxide, which is two parts more than ...

Acid-base indicators are compounds that turn different colors depending on the pH of the medium. From the numerous substances of this type, we will choose a pair that will allow you to conduct a seemingly impossible experiment. Some colors are created when we mix other colors together. But will we get blue by combining red with red? And vice versa: red from a combination of blue and blue? Everyone will definitely say no. Anyone, but not a chemist, for whom this task will not be a problem. All you need is an acid, a base, a Congo red indicator, and red and blue litmus papers. Prepare acid solutions in beakers (for example, by adding a little hydrochloric acid HCl to water) and basic solutions (sodium hydroxide solution, NaOH). After…

The outskirts of our solar system can be compared to the earth's oceans. Just like they (on a cosmic scale) are almost at our fingertips, but it is difficult for us to examine them thoroughly. We know many other more distant regions of space better than the regions of the Kuiper belt outside the orbit of Neptune and the Oort cloud outside (1). The New Horizons probe is already halfway between Pluto and its next exploration target, the 2014 Kuiper belt object. This is the region beyond the orbit of Neptune, starting at 69 AU. e. (or a. e., which is the average distance of the Earth from the Sun) and ending at about 30 a. e. from the Sun. 100. Kuiper belt and Oort cloud New Horizons unmanned aerial vehicle,…

Panasonic's Activelink, which created the Power Loader, calls it a "strength-enhancing robot." It is similar to many exoskeleton prototypes on display at trade shows and other technology presentations. However, it differs from them in that it will soon be possible to buy it normally and at a good price. Power Loader enhances human muscle strength with 22 actuators. The impulses that drive the actuator of the device are transmitted when a force is applied by the user. Sensors placed in the levers allow you to determine not only the pressure, but also the vector of the applied force, thanks to which the machine “knows” in which direction to act. A version is currently being tested that allows you to freely lift 50-60 kg. The plans include Power Loader with a load capacity of 100 kg. The designers emphasize that the device is not so much ...

The local Pittsburgh Business Times spotted a Uber-tested automatic car on the streets of that city, known for its famous app that replaces city taxis. The company's plans for self-driving cars became known last year, when it announced a collaboration with researchers from Carnegie Mellon University. Uber responded to a reporter's question about the construction, denying it was a complete system. A spokesman for the company explained in the newspaper that it was "the first exploratory attempt at mapping and security of autonomous systems." And Uber doesn't want to provide any further information. The photo, taken by the newspaper, shows a black Ford with the inscription "Uber Center of Excellence" and a rather large characteristic "growth" on the roof, which probably contains ...

Liquid fuels are usually obtained from the refining of crude oil or (to a lesser extent) from hard coal and lignite. They are mainly used to drive internal combustion engines and, to a lesser extent, to start steam boilers, for heating and technological purposes. The most important liquid fuels are: gasoline, diesel, fuel oil, kerosene, synthetic fuels. Gas A mixture of liquid hydrocarbons, one of the main types of fuel used in the engines of cars, aircraft and some other devices. Also used as a solvent. From a chemical point of view, the main components of gasoline are aliphatic hydrocarbons with the number of carbon atoms from 5 to 12. There are also traces of unsaturated and aromatic hydrocarbons. Gasoline supplies energy to the engine through combustion, that is, with oxygen from the atmosphere. ...