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Technology

Free VPNs – Is My Private Network Really Private If It’s Free?

free vpn

Free VPNs are very popular and there is certainly many different outlets and groups claiming to offer you a high-quality VPN completely free of charge! It really does sound too good to be true, doesn’t it?

Well, that is because it more than likely is. That is not to say there aren’t some good free VPNs available, but in the majority of cases a paid for VPN is going to be the better option. So, before your download that free VPN let’s take a look at some of the risks and downsides of using one.

They’re Outdated

The digital landscape is constantly changing and many free VPNs understandably don’t offer the latest security and encryption. Many only offer the older PPTP (Point to point tunneling protocol) which is nowadays a very standard and outdated encryption.

This means that you are only getting very basic security with a free VPN, that might not be all that useful or even that secure. An open VPN is generally thought to be the most useful VPN service available today and you won’t find many free VPNs offering you this.

Adverts

In a strange case of irony using a free VPN can actually cause you to see more ads than you would have without it! While many people use a VPN to prevent intrusive advertisements and a free VPN can certainly do that in some cases, you should consider whether dealing with a bunch of random pop-up ads every time you use the VPN is a good trade.

Customer Service

The saying “you get what you pay for” really applies when it comes to free VPNs, can you really expect much assistance if the VPN suddenly stops working if you’re not paying for it? Whereas the provider for a paid for VPN will likely be able to help you if your IP address is blocked or something goes wrong, the same can’t be said for a free one.

Security Risks

While this does not apply to all free VPNs it is important that you know the security risks involved with using one. Not all free VPNs are entirely legit, the providers could easily be logging your information to sell on and they could also open your device to harm from viruses and malware.

So you have to consider whether the risks are worth it just to save some money. The Anta.net website is a great place to research and compare VPN services and ensure that you only deal with legitimate VPN providers. And before you use any VPN whether it is a free or paid model you should search for reviews and information to ensure you you’re using a legitimate service.

The Final Say

It might be tempting to go for a free VPN after all, who doesn’t love to save a bit of money? But a paid for VPN is likely going to be a faster, more consistent and most importantly more secure alternative. You may indeed find a free VPN to be useful and perfectly suitable for your needs, but if you want a VPN service you can always rely on then a paid for VPN service is a safer and more reliable option.

Technology

Admiring of modern tendency in building is up to eye of beholder

swiss expo blur building of water

Architecture is sort of creative special-effect mechanism that taken you aback with breathtaking beauty and mysterious construction process. It could be noticed in all sized and shapes worldwide, from ashtray to urban planning. The common between these two kind of things is challenges the supposition concerning agreement of area. The vast majority of building companies keep up with recent development and could provide help with the craziest idea that comes to your mind. The most prominent British building services company – Piggott and Whitfield. It features following favors like project management, building and design, mechanical and electrical services, intelligent solutions, construction, fits-out etc.

Many of other, similar to previous mentioned, building services company have a tendency to create extraordinary, luxurious and gorgeous buildings. The bright example of them is exhibition pavilion that was built in honor of Swiss Expo 2012 that is founded near Geneva. The thing is that initial building material of this masterpiece is water. You could not find there roof or walls, only just the bulk of atomized water. Looks quite strange, doesn’t it? However in the era of globalization and computer progress, the architecture field is also in need of weird ideas and have voracious appetite for something that inspiring and out of the ordinary. Swiss Expo pavilion is considered to be the best known and most photographed place around the world. It demonstrates how modern high technologies could change our vision and understanding of possible architecture oddity.

Without a doubt, now you wonder, how does such building exist and actually for what purposes? The point is in pumping the water from lake, filtering and shooting in as a transparent mist. By the way, there is a station that checks not only the shifting conditions of damp, dew point, temperature, the direction and speed of wind and so long. These indicators processes data in the central computer and regulate measure and pressure of water and entirely distribution of it. Covering the area in size like football field and capture the area of 300 feet wide, it makes an impression of fascinating and stunning piece of art that you virtually haven’t seen before.

The feature that makes it so special is eccentricity. The problem is that most of the people accustom to normal space, however this future building is, in fact, blur. It is formeless, scareless, purposeless, dimessionless and depthless. Moreover, creating such architecture becomes a mainstream. For instance, The Institute of the Contemporary Art is situated in Boston’s waterfront or completely glassed elevator in size of New York studio apartment. On one hand, you could consider such installations kind of madness. On the other hand, the major point of them is close connection with the nature. The Institute of Contemporary Art gives you a golden opportunity to observe masterpieces in natural light rather than in artificial. Panoramic view of Atlantic Ocean and its tides could also help to be fully absorbed in art atmosphere. As far as huge lifts go, they could give you the feeling of flight through the coming light and air on all sides.

Technology

Roofing & Waterproofing Essentials: The Industrial Use

roof-coating-bearsden-clydebank

Roofing, waterproofing and sealing materials, especially roll, sheet and custom-made products, are designed to ensure complete isolation of the structures of buildings and structures from the damaging impact of aggressive environment, especially water, humidity and atmospheric factors. In this regard, the materials of this group should be firstly watertight, and secondly, to meet strength, deformability, chemical resistance, water-resistant and durable.

The spheres of using of these materials are diverse. They are required for internal and external protection of underground buildings, pits, foundations, culverts and pipes, sewers, tunnels, vaults, trenches and other types of facilities from the effects of groundwater with dissolved therein aggressive salts, acids and alkalis, as well as other chemicals. Protective coatings are also used for the following purposes:

  • the isolation of reservoirs, ponds, reservoirs (protection bridge structures carriageway supports);
  • at the device impervious screens and fortification coatings in hydraulic engineering;
  • to isolate the bottom and slopes of channels in the construction of irrigation systems;
  • for filling cavities in rocks at the device bases and foundations;
  • in the protection of floors in production areas and bathrooms;
  • when applying water-filled flat roofs, roofing of buildings and sealing layers in the roof;
  • for sealing joints, expansion joints, holes in the panel construction and piping.

Waterproofing not only protects the surface from contact with an aqueous medium, but favors the steam and gas isolation and increase resistance to corrosion of structural material.

An excursion into history

The application of waterproofing materials began in ancient times. According to the excavations found that 4500-5000 years ago natural bitumen and tar was used as binders and waterproofing materials in the construction of the Egyptian and Babylonian structures, isolation channels and drains, foundations of palaces and temples. Walls and floors in barns and granaries protected bituminous paint that provides long-term preservation of grain and other agricultural products. To increase the strength and thermal stability of bitumen frequently added to the particulate materials (mineral powder).

It should be noted that the natural bitumen is still one of the most reliable waterproofing materials. High varnishes, mastics, paints and enamels take advantage of this material during their manufacturing. However, a much larger share of waterproofing and roofing materials presently belongs to artificial bitumens (of oil) and wood tar binders. A tough bitumen and tar competitor and a stunning waterproofing material was obtained on the basis of synthetic resins and polymers. As for the quality it surpasses bitumen and tar and therefore polymers are widely used in waterproof plastic. However, for waterproofing even more likely to use compounded binders. Polyshield, according to Britannia public sales statistics, a far-famed UK business involved in roof coating and roof waterproofing materials production since 1996, finds itself among the top-3 bestselling products.

By type of binder used for roofing and waterproofing materials are classified as bituminous, wood tar, wood tar bitumen, bitumen-polymer and bitumen-rubber. Basing on the physical condition and appearance of the roofing and waterproofing materials are divided into roll and sheet types, piece goods, mastics, pastes and emulsions, paints and varnishes. Each of these species has its own specific features in the composition, structure and properties.

Technology

Cement quality: the works, the properties, the types

hydraulic lime

Modern architectural companies involved in historical restorations and ambitious modern construction projects, like Wolverhampton-based Telling, largely utilising neoteric hydraulic lime and lime mortar solutions, sets tough requirements towards cement quality. It should offer good adhesion after mixing with water and sand, but only after a certain period of time (45 to 60 minutes), so it can be prepared and used diligently. According to the theory of academician Baikov, cement setting takes place in three stages. First, there is the hydration of the mixture to form particles of calcium hydroxide, which is excreted in the amorphous state, glues cement grains. The second stage is setting of the cement. Then begins the third step – crystallisation or solidification. Calcium hydroxide particles become larger, turning into a needle-like crystals that seem to be riddling the amorphous mass of calcium silicate and sealing it. It should be noted that hardening of cement is the most effective when the temperature is not too low. Therefore, in winter the builders are taking measures to heat the buildings that are under construction.

Aluminous type

A higher quality than the silicate has aluminous cement, produced with the use of clays of a low silica content. The main components of this cement are calcium aluminates. It is more expensive than silica, but it offers more advantages. So, aluminous cement better resists the action of the sea water, it hardens quickly, and moreover, the addition of water to calcium aluminate provides exothermic reaction. This is very important because it is possible to conduct the work in winter with no extra expenses on heating designs. Within hours the solidified calcium aluminate cement has a strength that some lime types achieve only in a month. Not accidently, it is called ‘stone glue’. With this cement at your disposal you can prepare the concrete, which is not afraid of water, does not burn in the fire and doesn’t lose its properties for long decades to come.

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Technology

The weak points of plasma waste disposal: the focus on feasibility

plasma waste disposal

According to experts, industrial systems, implemented on technologies using plasma heating will be significantly inferior in terms of specific capital and operating costs of conventional incineration. According to estimates, the practical implementation of such a facility for the processing of solid waste on an industrial scale would cost 600-770 pounds per 1 ton of capacity (calculated annually). At the same time, the capital cost of the plant for the traditional ayer incineration with movable grate 350-450 pounds per 1 ton/year.

In comparisons of the energy efficiency (in terms of the total energy of the combustible components produced syngas) processes and plasma autothermal gasification at temperature of 1126,85°C for one and the same type of fuel (waste), it is shown that an additional energy yield of the synthesis gas, is achieved through the plasma, with existing methods of energy conversion, even without loss of cooling, ballasting of the working mixture in the reactor, etc. It can not cover the actual costs of electricity. It was also found that a further increase in temperature is accompanied by a slight increase in the chemical energy of the synthesis gas, that is, in terms of energy is not effective. Consequently, the use of plasma technology creates additional problems that reduce reliability and efficiency of the entire plant.

Environmental benefits are also doubtful (significantly less impact on the environment and a simplified diagram of the gas cleaning). The resulting synthesis gas has to be subjected to deep cleaning of contaminants which are formed in a reducing atmosphere at high temperatures: hydrogen sulfide, ammonia, phosphine, arsine, hydrogen chloride and others. The efficiency of rapid quenching of the synthesis gas used to destroy compounds such as dioxins and furans has not yet been proven by independent studies.

Let us consider in more detail the most proven technology by Simdean Company, a UK-based plasma waste disposal and industrial waste disposal solutions expert, servicing the domestic and abroad markets. The proposed technology relies on the use of plasma heat to produce synthesis gas (which is subsequently used to generate heat and electricity), a vitrified inert slag (which is converted and inorganic waste which can then be used in industrial production), and metals.

In general, the process of recycling is organised as follows. The waste from garbage trucks are unloaded into a hopper, where they are subjected to a powerful grinding to achieve the required size. Sewage sludge is partially dried (50% RH), and the tire is cut to obtain pieces of the required size for mixing with the solid waste and other waste to the gasification process. Prepared for the processing of waste into the upper part of the gasification reactor used in the gasification technology the company offers is different from other types of gasifiers primarily in construction of plasma torches with adjustable power, located in its bottom part (relative to the gasification zone) and the presence of lumpy coke cushion that prevents mass gasified product to fall below a certain point adjustment gasifier. Due to these differences gasifier provides recycling differ considerably in their morphological and physicochemical properties. The enhanced construction defines the increased efficiency that explains the reasonability of installing the technology at large enterprises with ongoing waste processing.

 

Technology

The industrial-scale use of ultrasonic cleaning equipment: the technology in action

1416914418_6vDuQ7gB_ultrasonicvamillenium

Under the influence of ultrasound of a certain intensity cavitation occurs in the liquid (occurrence and further explosion of huge number of microscopic bubbles). With the explosion of bubbles on the surface of some object immersed in the treatment solution, an enormous amount energy is released at the micro level, that leads to rapid separation of different impurities. This technology allows achieving a high degree of purification and is implemented by means of ultrasonic baths with embedded or immersed emitters. The use of ultrasound in some cases eliminates the use of chemically aggressive and environmentally harmful solutions.

The serial production largely utilises complex ultrasound washing equipment. An average system consists of nodes mounted on the modular principle, the use of which provides a broad range of technological capabilities. The nodes are combined into a mechanised or automated line of surface cleaning products after manufacturing operations. The complex is generally composed of an ultrasonic bath for cleaning, rinsing bath to finalise washing, drying chamber for transportation of clean products, automatic control and management panels.

For continuous precision cleaning of rolled products (wire, sheet, wire) a specialised ultrasonic line can be used. Cleaning and rinsing modules are fed with the washing solution and along with washing an imposition of high-power ultrasonic vibrations takes place. After washing an object is moved to a drying chamber. At the exit line, if necessary, heating of the product prior to coating, can be initiated. The line is built directly at the exit of the rolling equipment, or put to a separate production area and equipped with their own supply arrangements.

Cleaning of metal pipes from various manufacturing and operational pollution by using two sets of ultrasonic tools equipped with two channels for supplying a washing solution. Purification of the outer surface is carried out with magnetostrictive transducer from mechanical acoustical transformer of appropriate design and reflective plate on the opposite side of the pipe. Cleaning the insides of the pipe is implemented by a shell composed of an ultrasonic transmitter and an acoustic transformer converting the vibrations of the front end of the radiator into radial ones. The feed mechanism allows movement of the pipe through the nodes of cleaning the external and internal surfaces at a speed which provides the desired level of purification. At the inlet an induction heater can be installed for softening the oil and wax deposition.

To maintain cost savings and environmental procession improvement such systems can carry a variety of filtration systems and regeneration of process solutions. To supply washing modules with distilled water an industrial distiller can be used. With the advent of the technology and emergence of such innovating companies as Hilsonic, focusing on ultrasonic cleaner equipment manufacturing, the cost-efficiency of the cleaning method is pushing the use of ultrasonic cleaning equipment closer to medium and small enterprises; an obvious economical feasibility is confirmed by leasing opportunities manufacturers have started to offer.