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«    November 2018    »










DateDate: 30-11-2018, 05:57
The nanotechnology development company UbiQD, Inc., based in New Mexico, has released its first commercial product quantum dot film for greenhouses UbiGro.
“We have developed a safer, more budget and reliable technology of quantum dots and apply it on films for greenhouses. Before that, we used a film that converted shortwave ultraviolet radiation into longwave. During the experiments, films with quantum dots contributed to an increase in crop yields by more than 10%, as well as improved quality, ”said Matt Bergren, head of the UbiQD product department.
UbiGro with quantum dots is a modified luminescent film. It is installed above crops in greenhouses and contributes to better growth and development of plants. Currently, nanofilms are installed in five commercial greenhouses in New Mexico, Oregon and Colorado, where growers grow tomatoes, cucumbers, cannabis and hemp.
Photo 1. In the United States have developed a film with quantum dots for greenhouses
According to Mr. Bergren, almost every aspect of greenhouse farming is optimized and precisely controlled. And sunlight varies in color and intensity depending on the season and climate. Today, the only way to control the spectrum of light in a greenhouse is expensive, additional lighting. The UbiGro film contains copper-based quantum dots that adapt the spectrum of sunlight for optimized crop growth, transforming portions of ultraviolet, blue, and green sunlight into an orange glow.
In November of this year, the Environmental Protection Agency (EPA) granted UbiQD permission to start large-scale commercial production of quantum dots.

DateDate: 29-11-2018, 05:57

The new method allows, for example, to distinguish plant species according to the structure of their flower, as well as to study the smallest structures of herbs that are pollinated by the wind, the US Botanical Society said. A detailed description of the development appeared in the journal Applications in Plant Sciences.
The structures of flowers and other plant parts provide a rich and complex source of information that can provide answers to various questions about the evolution and systematics of plants. As computational approaches are becoming increasingly important for biological research, there is a great need to translate this information into acceptable numerical data for analysis. Phillip Klahs and his colleagues at the University of Iowa have developed a method for 3D modeling plant structures. They demonstrated the effectiveness of this method by creating models of flowers of three species of herbaceous plants from the family of Gramineae, which includes cereals, and reeds, and forage grasses.
Because of the small, compact and hidden structure, it is usually difficult to study the flowers of plants that are pollinated by the wind. Three-dimensional digital representations of these structures can help students studying botany to learn how to identify different types of herbs only by the flower structure.
Knowledge of the flowers of grassy plants will not only help in education - it is of great importance for the economy, since proper pollination of flowers leads to the production of grain crops, such as rice, wheat and maize. “Understanding the structure of seeds and the conditions under which pollen grains are pollinated can play a big role in agriculture,” Klais said. In addition, there are many weeds pollinated by the wind, information about which is also needed in agriculture.
The new method involves shooting thin areas of plant material using a light microscope and reconstructing these two-dimensional images into a 3D model using computer-aided design. This development has several advantages compared with existing methods of creating three-dimensional models of plant structures, such as optical photogrammetry and X-ray tomography. Firstly, the new method is cheaper than X-ray tomography. Secondly, in contrast to optical photogrammetry, it allows you to create a model of the internal - and not external - structure of a flower.

DateDate: 28-11-2018, 05:56

In Norway, they plan to use the waste of the fishing industry as a fuel for marine vessels. So writes, referring to the "New Time".
A cruise operator called “Hurtigruten” took up the implementation of this project. In total, it has seventeen aircraft. By 2021, this cruise operator plans to transfer six of its vessels to the above-mentioned biofuel. Representatives of "Hurtigruten" noted that this decision will make them the first cruise company in the world, whose ships will not work on fuel, which is based on fossils.
It is worth noting that this step is part of a large plan of this cruise company, the essence of which is to neutralize carbon. According to the Hurtigruthen staff, the first bio-powered ship may appear next year.
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DateDate: 27-11-2018, 05:56
Experts from Artezio analyzed the functionality of over 20 instant messengers and named the Top 8 most secure mobile instant messaging applications. Some quite popular sites turned out to be unsafe for users.
Reports about it
In an analytical study, experts examined the quality of encryption and the possibility of information disclosure, the degree of protection of personal data of users, the functionality of basic storage systems and other components. In total, more than 30 criteria were investigated. The first place went to the Signal service, the advantage of which is two-factor identification and encryption method. Second place went to the American messenger Wickr, which is great for corporate use. Telegram has the third place. The fourth line at the Confide application.
The fifth position went to Viber, and the sixth - Line. In seventh place WhatsApp, and closes the Top iMessage. Experts advised to bypass the Facebook Messenger. This platform has weak protection and is unable to delete comments.

DateDate: 26-11-2018, 05:55

An atmospheric ion engine has been developed that allows the creation of aircraft that have no moving parts.
A group of researchers and engineers from the Massachusetts Institute of Technology managed to do what was considered impossible for quite a long time - to lift and keep an aircraft in the air that does not use any moving parts to create lift. This device, weighing only 2.3 kilograms and having a wingspan of about 5 meters, is very similar to the model of the airframe, to which an unusual design is attached to the bottom. This design is an atmospheric ion engine, creating a silent stream of ionized air, due to which the aircraft is able to fly a distance of 60 meters. And this restriction is not imposed by the capabilities of the ion engine or energy source, the length of the room of the sports center, within which the tests were carried out, has such a length.
The principle used by the experts at the Massachusetts Institute of Technology in the ion engine is called electro-aerodynamics, and it was discovered in the 1920s by the famous pilot and designer Alexander Major Se de Seversky. The idea is to create a grid of thin wires or strips of foil, one of the grids serves as a positive, and the second - a negative electrode. The electric potential at these electrodes separates electrons from air molecules, which begin to move towards the negative electrode. Collisions with other neutral air molecules generate a stream of air that is capable of creating a weak thrust force, which, however, can already be measured.
The problem of electrodynamics lies in the fact that devices created on its basis had, until recently, large dimensions, which excluded the possibility of their practical application. Because of this, the range of such devices was small and limited mainly to ionic air cleaning systems.
The breakthrough in the creation of an atmospheric ion engine was made possible by the work of Professor Steven Barrett, who dedicated about this direction to about 9 years. The result of this work was a fairly highly efficient ion engine consisting of conductors of different thickness, which makes it look like some kind of exotic radio antenna. These conductors act as separate electrodes, and the alternation of positive and negative electrodes in a particular sequence and allowed to increase the efficiency of the engine as a whole.
The energy source of the ion engine is a small lithium-polymer rechargeable battery located in the fuselage of the aircraft. A specialized high-voltage electronic system, developed and created by experts of the Power Electronics Research Group, allows to obtain an electrical potential of 40 thousand volts, which is fed to the electrodes of the ion engine.
As you can see, the design of the atmospheric ion engine is very primitive, but this engine allows the aircraft to actually fly rather than plan, constantly sliding downward through the air currents.
“Since the atmospheric ion engine runs exclusively on electricity and does not need fuel, it can be used to ensure the flight of stratospheric aircraft, rising almost to the border with space,” says Professor Barrett, “Besides, such an engine can be a source of additional traction for aircraft using more traditional technologies. "
Researchers recognize that practical aircraft using similar ion engines will not appear very soon. Nevertheless, the efficiency and environmental friendliness of such an engine makes scientists continue to work in this direction. And in the near future, researchers plan to increase efficiency with the help of technologies to increase the area of electrodes, which do not require a significant increase in the size and weight of the engine.