Daily Gadget

The Diode

One trouble - led light sources are still too expensive. But talk about it below. Sure, the led sign everyone - those red and green lights, indicators that apply to any household appliances. But before recently, LEDs were thin and could not be lit in blue and white. Both problems were solved in 1990, and since then we can speak seriously about replacing traditional light sources ultraluminous LEDs. Now is the time to understand how the led, and why he is so good. In fact, it is the same semiconductor diode that is used in electrical circuits as a rectifier, but it is made not from silicon, and from special, so-called "direct-gap" semiconductors.

In general, the semiconductor can be imagined graphically as a two-storey house for electrons. Upper floor (called "conduction band") almost empty. The ground floor ("valence"), by contrast, is filled with e-mail to a refusal, but it may be free space (such "vacant positions" for the electrons in a scientific way are called holes). When an electron with a "top- floor "found a hole, ie, unoccupied space on the" ground floor ", then it becomes possible to" jump down "- a process known as recombination of electrons and holes. If the diode voltage is applied the correct polarity (Light-emitting diodes: from 2 to 4 V, depending on color), the electrons and holes will run towards each other and the recombination will occur in droves. Jumping from the "upper" floors on the "bottom", the electrons lose energy, this energy can be dissipated as heat (as occurs in silicon diodes), and may radiate in the form of light - and the latter is the principle of the LEDs.

Environmental Protection Klaus Toepfer

In particular, she noted that active measures for the protection of a threat to workers places and investment in Germany. Meanwhile, former German Federal Minister of Environmental Protection Klaus Toepfer refutes concerns that measures to protect the climate are a threat to the existence of jobs. He believes rejection of measures on climate protection in the eu is extremely shortsighted. Klaus Toepfer, said that climate protection can not be subject konyunkturno-political considerations. Russians continue to suffer from a bad environment According to Environment Centre 'Dodo', referring to the Committee for Hydrometeorology, more than 70% of Russian citizens breathe polluted air, the harmful substance which exceeds the maximum permissible concentration. Peter Thiel has similar goals. The special issue was devoted to Volga region. Director of Environmental Center 'Dodo' Kayumov recalled that among the most pressing problems of the Volga, the deteriorating water quality, air pollution, increase the number of deaths from diseases provoked by environmental factors. According to him, in Russia, 50 thousand people die annually from diseases caused by bad ecology.

Including diseases of the gastrointestinal tract, kidney, liver, and allergies. He also noted that in the Volga region accounts for two thirds of Russian industry, so that environmental problems in this area are particularly relevant. Was awarded a prize for 'Best Environmental Project of the Year' on Thursday evening in Moscow were awarded honorary diplomas and special prize winners of 46 mep 'Best Environmental Project of the Year'. This award was established in 2008 by the Ministry of Natural Resources and Ecology of Russia to identify industrial, scientific and technical achievements in the field of nature protection and environmental safety.

Classification Criteria For ACS

ams classification strongly depends on the classification criteria. By the form used by the control device information distinguish open and closed ACS: in open systems there is no feedback between the output of control object and the input control device. In such systems, value-driven not controlled. If there is a feedback facility management and control unit form a closed loop provides automatic monitoring of control object. By the nature of changes in the driving influence of acs can be attributed to the following types: automatic stabilization, giving the effect that constantly, and these systems are designed to maintain consistency of some physical parameter (temperature, pressure, speed, etc.), program control, giving the effect that changes in any previously known to the law (for example, a given program can be modified speed motor drives, change the product temperature during heat treatment, etc.) tracking, giving the effect which varies according to the arbitrary, a priori unknown to the law (used to control the parameters of the control objects in the external conditions). In recent years, are becoming increasingly important adaptive control systems, characterized by action on the object of management of any completely unknown factors. As a result, the need to solve the control problem under uncertainty of input data for decision on control actions. These systems can adapt to environmental changes and the object management, and improve its performance as experience is gained, ie information on results management.

In turn, adaptive process control are divided into: the optimal, which provide automatic maintenance of the facility management of most advantageous mode, self-tuning, the parameters of the control object which is not remain unchanged, and converted to a change in external conditions, self-organizing, algorithm which does not remain unchanged, but improved when the parameters of the object management and external conditions, self-learning, which analyze the experience gained object management and on this basis will automatically improve its structure and method .Po nature of the acs is divided into continuous and discrete actions. In the continuous process control for continuous variation of the input signal also varies smoothly and the output signal. In the discrete process control for continuous variation of the input signal output signal changes abruptly. Management methods based on the use of digital technology, always lead to discrete control systems. By the nature of change the tone settings of acs can be divided into linear and nonlinear, steady and unsteady. Visit Peter Thiel for more clarity on the issue. By number of parameters themselves ams are one-dimensional or multidimensional (multiparameter). It should be noted that the classification of the acs can also be constructed on the basis of other criteria, for example, can be classified by acs the physical nature of the system or its major parts, the power actuator, etc. Each of these methods of classification of acs is often independent of the others. This means that each of them can be represented as a scale in a multidimensional phase space, while the specific process control in this space will correspond to points or certain areas.

Heat Gun

Was small and could not understand what it is - heat gun! my dad worked in the energy company, and very often on the phone I heard him talk about work which is constantly referred to this unusual name Well duck So once I saw it, but certainly did not understand that she Heat gun - a small range of equipment for a good heating of any premises. The portable heat gun is easy and great heats, any small unheated space and creates a specific point on the impact of warm air inside the room - just like my father said to me I looked at this incomprehensible Bandurin and horror all fine this word drifted into the I upset then it turned into small small rooms in the living rooms and offices, in stores this priborische outputting not only can serve as an additional source of heat but the main one. He quietly heats and garages and other facilities such as pedestrian crossings underground. Well, it's again about the specifics I generally like or dislike and I went to his father's footsteps as they say, and now also energy and heat guns are also engaged in only Now again I am glad to hear them every time and I'm glad warmed them warm!.

Electromagnetic Fields

As mentioned in the Old Testament: "And will all the earth: bordered by filaments'. It seems that these words were indeed prophetic. Now Globe surrounded by hundreds of thousands of electrical wires. So what, you say, we also have to live somehow, we are accustomed to refrigerators and TVs, do have to give up all this not to be afraid of the offensive end of the world. Yes, refuse from anything you do not want to only to the extent possible to protect themselves against effects of electromagnetic fields. It is understandable that snacking on house wires are not needed, but consider in what place is your house or yard. Scourge of many cities are building lots under the power lines (power lines). Berries, vegetables is possible, but work on these gardens can not.

Unfortunately, the gardens and lined them houses that are in close proximity to power lines, are there illegally, and hence the norm the correct location are not met. Since it is impossible to completely change the situation, it is necessary in any case, to protect themselves from harmful effects of power lines. First, power lines generate magnetic fields. Normal, not leads to oncological diseases of the magnetic field is level 0,3 - 0,4 mT. Secondly, apart from the magnetic field generated by electric fields. There are sanitary protection zones, within which is prohibited build houses and public buildings.

Here you can grow those crops that do not require a long stay of the person and the use of manual labor. The electromagnetic field of the line is dangerous to health. A person may develop cataracts, broken kroei circulation in the vessels of the brain. Butterflies, for example, try to fly away from electrical wires, the plant under power lines, develop various abnormalities - extra petals, a new form.

Voronezh Reserve

In Moscow will be 'ER' for animals It is no secret that suffer from not only people but animals. Sometimes, if our pet is ill, you want as soon as possible to return your pet to a healthy life. In the near future it will become very real - in Moscow will be a 'first aid' for the animals. However, the first time the veterinary services 'emergency' will benefit animals belonging to veterans, disabled, large families, other preferential categories of citizens, as well as in cases of non-transportable animals. According to the developed and the adoption of the draft until 2011 station to fight animal diseases administrative districts will be equipped with mobile laboratories, veterinary and sanitary examination. The draft resolution says that within six months should be amended proposal for the establishment of advanced training and retraining of veterinary experts on the basis of units of the State Veterinary Service, Moscow, and within three months in - proposals for provision of benefits to pay for veterinary care of animals belonging to the first group of people with disabilities and families raising children with disabilities under the age of 23 years.

The existence of the Reserve has come under threat last week Lipetsk Governor Oleg Korolev signed a decree according to which 5000 hectares of land at State Biosphere Reserve lost the status of protected area. Recall that in the buffer zone is prohibited construction, hunting, any economic activity. Therefore, the appearance of pits, and later, perhaps, homes, workers preserve compared with the spontaneous disaster.

Physical Chemistry Corrosion

The problem of protecting metals from corrosion, familiar to mankind since ancient times, remains highly relevant. According to the National Association of Corrosion Engineers U.S. only direct costs of corrosion in this country are 276 (not a typo) billion. dollars per year. Similar studies concerning our country, not carried out with the 70-ies, however, reason to believe that things in Russia the situation is much better, unfortunately, no. To 60, and according to some estimates up to 80% corrosion losses accounted for the destruction of metals in atmospheric conditions. To combat the widely used atmospheric corrosion inhibitors (inhibitors) corrosion.

Over the past decade, they have essentially changed many of the classical means of protection of metals: oils, greases, paint, and thin-film preservative coating. Inhibitors are used in modern technological liquids: cooling, lubricating, hydraulic, etc., construction and packaging materials, detergents, etc. Among the inhibitors of atmospheric corrosion of reliability and efficiency are different so-called volatile inhibitors corrosion. Their use is almost always shown when it is possible at least partial isolation of the protected space. Evaporate at ambient temperature, volatile corrosion inhibitors in the form of vapor reaching the metal and adsorbed on the surface and saturating the condensed phase, provide reliable protection products.

The pairs of volatile corrosion inhibitors penetrate into the cracks and gaps that are inaccessible to other types of inhibitors, provide inhibition of corrosion processes under layers of corrosion products and deposits. Recognized world leader in the theory and practice of protecting metals volatile inhibitors of the Institute of Physical Chemistry and Electrochemistry ras them. an Frumkin (IFHE RAS). Work in this area are conducted in ifhe Sciences for over 50 years. Here are current volatile corrosion inhibitors based materials for various industries. volatile inhibitors developed in the Institute share a common abbreviation ifhan. Now this technology series of volatile inhibitors, has more than 10 drugs. Volatile corrosion inhibitors ifhan used for conservation energy equipment, pipes, tanks, cooling systems and air conditioning products of complex configuration, precision engineering, metal powders, cermets, microelectronics, and more. Volatile corrosion inhibitors ifhan last 4 th generation:-effectively protect ferrous and nonferrous metals, unfavorable contact pairs in all climatic conditions;-prevent the development of existing corrosion on the metal centers; -Reduce the effort needed for conservation equipment, have a high radius of protection and a powerful protective aftereffect;-well combined with other means of corrosion protection of metals and all types of barrier and packaging materials, can be used for the modification of packaging materials - paper and polymer films;-produced under the supervision of the authors of domestic raw materials;-low toxicity. The development of volatile corrosion inhibitors ifhan awarded numerous medals vvc. Their application in practice is regulated by gost 9.014-78, "ESZKS. Temporary Corrosion protection products. General requirements. " Volatile corrosion inhibitors ifhan made in the form of pure substances, substances modified odorant (odorants) or on porous materials (silica and others). Shelf life of drugs in an airtight container up to 5 years. The technology of using volatile corrosion inhibitors ifhan depends on the particular problem. Typically, conservation comes down to the introduction of the inhibitor in the package (taking into account the norms of bookmarks), and - the removal of the barrier material. Norms bookmarks volatile inhibitors ifhan not exceed 150 g per cubic meter. volume protected. At the conclusion of independent experts, volatile corrosion inhibitors ifhan performance and technological properties surpass foreign analogues. Volatile corrosion inhibitors ifhan provide a solution to virtually any emerging problems in practice for the protection of vapor-phase metals.

Multifunction Cartridges

Model HP-Deskiet F2180 for example, differs from other printers, this same price category. He has the best access to the cartridges, do not tilt the lid with your scanner. A paper feed tray is made from high quality expensive plastic and equipped with a guide who used for printing small photos. And in the Canon Pixma MP160 scanner lid is lifted when scanning thick books and convenient it presses. But should also be borne in mind that inexpensive mfp scanner equipped with a CIS-scanning line, opportunities are limited. Scanner with a ruler can not scan in three dimensions, and is very sensitive to open the scanner lid. This leads to the fact that the image is overexposed and low quality. But for home use it fully meets our requirements.

Let's talk about supplies. Cost of consumables is important. And before you choose a model must necessarily mfp familiarize with the prices of cartridges for this model. In the set of cartridges are always sold at a deshovoy price, and to some models you can buy the ink, along with syringes and cartridges refilled itself. This fact will be a great advantage in favor of this model, MFIs. Highly recommend buying the printer to draw attention to the cartridge (how many pages of text or pictures will suffice him after refueling) If the mfp with integrated fax, need to ask optical resolution (DPI) when scanning a document. All Multifunction print digital photos, but of different quality. More IFIs differ in rate of scanning and sending fax minute.

And comparing your requirements, price, the main characteristics of this model can make the right choice. We should not forget about the means to care for MFIs, as ink-jet printing, droplets of ink can scatter and fall on the body itself a printer inside the device. There are special facilities for the care of printers and instructions. Use them to ensure the continued smooth and proper operation of the mfp. In conclusion, that today the market can offer for a very modest price of a unique set of functions in the form of mfp. Multifunction Printers, mostly all in color, with an average price range have the same speed, resolution and ability to work with photographic paper, as well as color inkjet printers. Even among the middle-price category is a model for anyone, even the taste. Refilling ink cartridges and printer repair inkjet multifunction devices.